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BaseTools: Update Brotli Compress to the latest one 1.0.6 

https://bugzilla.tianocore.org/show_bug.cgi?id=1201
Update Brotli to the latest version 1.0.6
https://github.com/google/brotli
Verify VS2017, GCC5 build.
Verify Decompression boot functionality.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Liming Gao 2018-08-09 14:55:19 +08:00
parent 78af0984b4
commit dd4f667e70
99 changed files with 21720 additions and 30845 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
BaseTools/BinWrappers/PosixLike/BrotliCompress
View File

@ -2,7 +2,7 @@
#
# This script will exec Brotli tool with -e/-d options.
#
# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@ -11,18 +11,15 @@
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
QLT="-q 9"
INPUTFLAG=0
QLT="-q 9 -w 22"
ARGS=
while test $# -gt 0
do
case $1 in
-e)
INPUTFLAG=1
;;
-d)
INPUTFLAG=1
ARGS+="$1 "
;;
-o|-g)
@ -34,16 +31,10 @@ do
shift
;;
*)
if [ $INPUTFLAG -eq 1 ]
then
ARGS+="-i $1 "
INPUTFLAG=0
else
ARGS+="$1 "
fi
ARGS+="$1 "
;;
esac
shift
done
exec Brotli $ARGS $QLT
exec Brotli $QLT $ARGS

16
BaseTools/Source/C/BrotliCompress/BrotliCompress.bat → BaseTools/BinWrappers/WindowsLike/BrotliCompress.bat
View File

@ -1,7 +1,7 @@
@REM @file
@REM This script will exec Brotli tool with -e/-d options.
@REM
@REM Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
@REM Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
@REM This program and the accompanying materials
@REM are licensed and made available under the terms and conditions of the BSD License
@REM which accompanies this distribution. The full text of the license may be found at
@ -14,22 +14,19 @@
@echo off
@setlocal
set QLT=-q 9
set INPUTFLAG=0
set QLT=-q 9 -w 22
set ARGS=
:Begin
if "%1"=="" goto End
if "%1"=="-d" (
set INPUTFLAG=1
set ARGS=%ARGS% %1
shift
goto Begin
)
if "%1"=="-e" (
set INPUTFLAG=1
shift
goto Begin
)
@ -55,15 +52,10 @@ if "%1"=="-q" (
goto Begin
)
if %INPUTFLAG% == 1 (
set ARGS=%ARGS% -i %1
set INPUTFLAG=0
) else (
set ARGS=%ARGS% %1
)
set ARGS=%ARGS% %1
shift
goto Begin
:End
Brotli %ARGS% %QLT%
Brotli %QLT% %ARGS%
@echo on

7
BaseTools/Source/C/BrotliCompress/GNUmakefile
View File

@ -15,20 +15,24 @@ MAKEROOT ?= ..
APPNAME = Brotli
OBJECTS = \
tools/bro.o \
tools/brotli.o \
common/dictionary.o \
common/transform.o \
dec/bit_reader.o \
dec/decode.o \
dec/huffman.o \
dec/state.o \
enc/backward_references.o \
enc/backward_references_hq.o \
enc/bit_cost.o \
enc/block_splitter.o \
enc/brotli_bit_stream.o \
enc/cluster.o \
enc/compress_fragment.o \
enc/compress_fragment_two_pass.o \
enc/dictionary_hash.o \
enc/encode.o \
enc/encoder_dict.o \
enc/entropy_encode.o \
enc/histogram.o \
enc/literal_cost.o \
@ -39,4 +43,5 @@ OBJECTS = \
include $(MAKEROOT)/Makefiles/app.makefile
TOOL_INCLUDE = -I ./include
LIBS += -lm

20
BaseTools/Source/C/BrotliCompress/Makefile
View File

@ -1,7 +1,7 @@
## @file
# Windows makefile for 'Brotli' module build.
#
# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
@ -12,13 +12,14 @@
#
!INCLUDE ..\Makefiles\ms.common
INC = -I .\include $(INC)
CFLAGS = $(CFLAGS) /W2
APPNAME = Brotli
#LIBS = $(LIB_PATH)\Common.lib
COMMON_OBJ = common\dictionary.obj
COMMON_OBJ = common\dictionary.obj common\transform.obj
DEC_OBJ = \
dec\bit_reader.obj \
dec\decode.obj \
@ -26,13 +27,16 @@ DEC_OBJ = \
dec\state.obj
ENC_OBJ = \
enc\backward_references.obj \
enc\backward_references_hq.obj \
enc\bit_cost.obj \
enc\block_splitter.obj \
enc\brotli_bit_stream.obj \
enc\cluster.obj \
enc\compress_fragment.obj \
enc\compress_fragment_two_pass.obj \
enc\dictionary_hash.obj \
enc\encode.obj \
enc\encoder_dict.obj \
enc\entropy_encode.obj \
enc\histogram.obj \
enc\literal_cost.obj \
@ -42,19 +46,9 @@ ENC_OBJ = \
enc\utf8_util.obj
OBJECTS = \
tools\bro.obj \
tools\brotli.obj \
$(COMMON_OBJ) \
$(DEC_OBJ) \
$(ENC_OBJ)
!INCLUDE ..\Makefiles\ms.app
all: $(BIN_PATH)\BrotliCompress.bat
$(BIN_PATH)\BrotliCompress.bat: BrotliCompress.bat
copy BrotliCompress.bat $(BIN_PATH)\BrotliCompress.bat /Y
cleanall: localCleanall
localCleanall:
del /f /q $(BIN_PATH)\BrotliCompress.bat > nul

2
BaseTools/Source/C/BrotliCompress/ReadMe.txt
View File

@ -1,2 +1,2 @@
It is based on the Brotli v0.5.2.
It is based on the Brotli v1.0.6.
Brotli was released on the website https://github.com/google/brotli.

25
BaseTools/Source/C/BrotliCompress/common/constants.h
View File

@ -28,14 +28,25 @@
/* "code length of 8 is repeated" */
#define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8
/* "Large Window Brotli" */
#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U
#define BROTLI_LARGE_MIN_WBITS 10
#define BROTLI_LARGE_MAX_WBITS 30
/* Specification: 4. Encoding of distances */
#define BROTLI_NUM_DISTANCE_SHORT_CODES 16
#define BROTLI_MAX_NPOSTFIX 3
#define BROTLI_MAX_NDIRECT 120
/* BROTLI_NUM_DISTANCE_SYMBOLS == 520 */
#define BROTLI_NUM_DISTANCE_SYMBOLS (BROTLI_NUM_DISTANCE_SHORT_CODES + \
BROTLI_MAX_NDIRECT + \
(24 << (BROTLI_MAX_NPOSTFIX + 1)))
#define BROTLI_MAX_DISTANCE_BITS 24U
#define BROTLI_DISTANCE_ALPHABET_SIZE(NPOSTFIX, NDIRECT, MAXNBITS) ( \
BROTLI_NUM_DISTANCE_SHORT_CODES + (NDIRECT) + \
((MAXNBITS) << ((NPOSTFIX) + 1)))
/* BROTLI_NUM_DISTANCE_SYMBOLS == 1128 */
#define BROTLI_NUM_DISTANCE_SYMBOLS \
BROTLI_DISTANCE_ALPHABET_SIZE( \
BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS)
#define BROTLI_MAX_DISTANCE 0x3FFFFFC
#define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC
/* 7.1. Context modes and context ID lookup for literals */
/* "context IDs for literals are in the range of 0..63" */
@ -44,4 +55,10 @@
/* 7.2. Context ID for distances */
#define BROTLI_DISTANCE_CONTEXT_BITS 2
/* 9.1. Format of the Stream Header */
/* Number of slack bytes for window size. Don't confuse
with BROTLI_NUM_DISTANCE_SHORT_CODES. */
#define BROTLI_WINDOW_GAP 16
#define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP)
#endif /* BROTLI_COMMON_CONSTANTS_H_ */

330
BaseTools/Source/C/BrotliCompress/dec/context.h → BaseTools/Source/C/BrotliCompress/common/context.h
View File

@ -6,110 +6,171 @@
/* Lookup table to map the previous two bytes to a context id.
There are four different context modeling modes defined here:
CONTEXT_LSB6: context id is the least significant 6 bits of the last byte,
CONTEXT_MSB6: context id is the most significant 6 bits of the last byte,
CONTEXT_UTF8: second-order context model tuned for UTF8-encoded text,
CONTEXT_SIGNED: second-order context model tuned for signed integers.
There are four different context modeling modes defined here:
CONTEXT_LSB6: context id is the least significant 6 bits of the last byte,
CONTEXT_MSB6: context id is the most significant 6 bits of the last byte,
CONTEXT_UTF8: second-order context model tuned for UTF8-encoded text,
CONTEXT_SIGNED: second-order context model tuned for signed integers.
The context id for the UTF8 context model is calculated as follows. If p1
and p2 are the previous two bytes, we calculate the context as
If |p1| and |p2| are the previous two bytes, and |mode| is current context
mode, we calculate the context as:
context = kContextLookup[p1] | kContextLookup[p2 + 256].
context = ContextLut(mode)[p1] | ContextLut(mode)[p2 + 256].
If the previous two bytes are ASCII characters (i.e. < 128), this will be
equivalent to
For CONTEXT_UTF8 mode, if the previous two bytes are ASCII characters
(i.e. < 128), this will be equivalent to
context = 4 * context1(p1) + context2(p2),
context = 4 * context1(p1) + context2(p2),
where context1 is based on the previous byte in the following way:
where context1 is based on the previous byte in the following way:
0 : non-ASCII control
1 : \t, \n, \r
2 : space
3 : other punctuation
4 : " '
5 : %
6 : ( < [ {
7 : ) > ] }
8 : , ; :
9 : .
10 : =
11 : number
12 : upper-case vowel
13 : upper-case consonant
14 : lower-case vowel
15 : lower-case consonant
0 : non-ASCII control
1 : \t, \n, \r
2 : space
3 : other punctuation
4 : " '
5 : %
6 : ( < [ {
7 : ) > ] }
8 : , ; :
9 : .
10 : =
11 : number
12 : upper-case vowel
13 : upper-case consonant
14 : lower-case vowel
15 : lower-case consonant
and context2 is based on the second last byte:
and context2 is based on the second last byte:
0 : control, space
1 : punctuation
2 : upper-case letter, number
3 : lower-case letter
0 : control, space
1 : punctuation
2 : upper-case letter, number
3 : lower-case letter
If the last byte is ASCII, and the second last byte is not (in a valid UTF8
stream it will be a continuation byte, value between 128 and 191), the
context is the same as if the second last byte was an ASCII control or space.
If the last byte is ASCII, and the second last byte is not (in a valid UTF8
stream it will be a continuation byte, value between 128 and 191), the
context is the same as if the second last byte was an ASCII control or space.
If the last byte is a UTF8 lead byte (value >= 192), then the next byte will
be a continuation byte and the context id is 2 or 3 depending on the LSB of
the last byte and to a lesser extent on the second last byte if it is ASCII.
If the last byte is a UTF8 lead byte (value >= 192), then the next byte will
be a continuation byte and the context id is 2 or 3 depending on the LSB of
the last byte and to a lesser extent on the second last byte if it is ASCII.
If the last byte is a UTF8 continuation byte, the second last byte can be:
- continuation byte: the next byte is probably ASCII or lead byte (assuming
4-byte UTF8 characters are rare) and the context id is 0 or 1.
- lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1
- lead byte (208 - 255): next byte is continuation byte, context is 2 or 3
If the last byte is a UTF8 continuation byte, the second last byte can be:
- continuation byte: the next byte is probably ASCII or lead byte (assuming
4-byte UTF8 characters are rare) and the context id is 0 or 1.
- lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1
- lead byte (208 - 255): next byte is continuation byte, context is 2 or 3
The possible value combinations of the previous two bytes, the range of
context ids and the type of the next byte is summarized in the table below:
The possible value combinations of the previous two bytes, the range of
context ids and the type of the next byte is summarized in the table below:
|--------\-----------------------------------------------------------------|
| \ Last byte |
| Second \---------------------------------------------------------------|
| last byte \ ASCII | cont. byte | lead byte |
| \ (0-127) | (128-191) | (192-) |
|=============|===================|=====================|==================|
| ASCII | next: ASCII/lead | not valid | next: cont. |
| (0-127) | context: 4 - 63 | | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. |
| (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: ASCII/lead | not valid |
| (192-207) | | context: 0 - 1 | |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: cont. | not valid |
| (208-) | | context: 2 - 3 | |
|-------------|-------------------|---------------------|------------------|
The context id for the signed context mode is calculated as:
context = (kContextLookup[512 + p1] << 3) | kContextLookup[512 + p2].
For any context modeling modes, the context ids can be calculated by |-ing
together two lookups from one table using context model dependent offsets:
context = kContextLookup[offset1 + p1] | kContextLookup[offset2 + p2].
where offset1 and offset2 are dependent on the context mode.
|--------\-----------------------------------------------------------------|
| \ Last byte |
| Second \---------------------------------------------------------------|
| last byte \ ASCII | cont. byte | lead byte |
| \ (0-127) | (128-191) | (192-) |
|=============|===================|=====================|==================|
| ASCII | next: ASCII/lead | not valid | next: cont. |
| (0-127) | context: 4 - 63 | | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. |
| (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: ASCII/lead | not valid |
| (192-207) | | context: 0 - 1 | |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: cont. | not valid |
| (208-) | | context: 2 - 3 | |
|-------------|-------------------|---------------------|------------------|
*/
#ifndef BROTLI_DEC_CONTEXT_H_
#define BROTLI_DEC_CONTEXT_H_
#ifndef BROTLI_COMMON_CONTEXT_H_
#define BROTLI_COMMON_CONTEXT_H_
#include "../common/types.h"
#include <brotli/types.h>
enum ContextType {
typedef enum ContextType {
CONTEXT_LSB6 = 0,
CONTEXT_MSB6 = 1,
CONTEXT_UTF8 = 2,
CONTEXT_SIGNED = 3
};
} ContextType;
/* Common context lookup table for all context modes. */
static const uint8_t kContextLookup[1792] = {
static const uint8_t kContextLookup[2048] = {
/* CONTEXT_LSB6, last byte. */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* CONTEXT_LSB6, second last byte, */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* CONTEXT_MSB6, last byte. */
0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11,
12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15,
16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19,
20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27,
28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35,
36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39,
40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43,
44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47,
48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51,
52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55,
56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59,
60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63,
/* CONTEXT_MSB6, second last byte, */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* CONTEXT_UTF8, last byte. */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0,
@ -130,6 +191,7 @@ static const uint8_t kContextLookup[1792] = {
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
/* CONTEXT_UTF8 second last byte. */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@ -150,23 +212,7 @@ static const uint8_t kContextLookup[1792] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
/* CONTEXT_SIGNED, second last byte. */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
/* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */
0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@ -184,68 +230,32 @@ static const uint8_t kContextLookup[1792] = {
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56,
/* CONTEXT_LSB6, last byte. */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
/* CONTEXT_MSB6, last byte. */
0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7,
8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11,
12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15,
16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19,
20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27,
28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35,
36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39,
40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43,
44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47,
48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51,
52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55,
56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59,
60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63,
/* CONTEXT_{M,L}SB6, second last byte, */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* CONTEXT_SIGNED, second last byte. */
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
};
static const int kContextLookupOffsets[8] = {
/* CONTEXT_LSB6 */
1024, 1536,
/* CONTEXT_MSB6 */
1280, 1536,
/* CONTEXT_UTF8 */
0, 256,
/* CONTEXT_SIGNED */
768, 512,
};
typedef const uint8_t* ContextLut;
#endif /* BROTLI_DEC_CONTEXT_H_ */
/* typeof(MODE) == ContextType; returns ContextLut */
#define BROTLI_CONTEXT_LUT(MODE) (&kContextLookup[(MODE) << 9])
/* typeof(LUT) == ContextLut */
#define BROTLI_CONTEXT(P1, P2, LUT) ((LUT)[P1] | ((LUT) + 256)[P2])
#endif /* BROTLI_COMMON_CONTEXT_H_ */

15341
BaseTools/Source/C/BrotliCompress/common/dictionary.c
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47
BaseTools/Source/C/BrotliCompress/common/dictionary.h
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@ -9,18 +9,53 @@
#ifndef BROTLI_COMMON_DICTIONARY_H_
#define BROTLI_COMMON_DICTIONARY_H_
#include "./types.h"
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
extern const uint8_t kBrotliDictionary[122784];
extern const uint32_t kBrotliDictionaryOffsetsByLength[25];
extern const uint8_t kBrotliDictionarySizeBitsByLength[25];
typedef struct BrotliDictionary {
/**
* Number of bits to encode index of dictionary word in a bucket.
*
* Specification: Appendix A. Static Dictionary Data
*
* Words in a dictionary are bucketed by length.
* @c 0 means that there are no words of a given length.
* Dictionary consists of words with length of [4..24] bytes.
* Values at [0..3] and [25..31] indices should not be addressed.
*/
uint8_t size_bits_by_length[32];
#define kBrotliMinDictionaryWordLength 4
#define kBrotliMaxDictionaryWordLength 24
/* assert(offset[i + 1] == offset[i] + (bits[i] ? (i << bits[i]) : 0)) */
uint32_t offsets_by_length[32];
/* assert(data_size == offsets_by_length[31]) */
size_t data_size;
/* Data array is not bound, and should obey to size_bits_by_length values.
Specified size matches default (RFC 7932) dictionary. Its size is
defined by data_size */
const uint8_t* data;
} BrotliDictionary;
BROTLI_COMMON_API const BrotliDictionary* BrotliGetDictionary(void);
/**
* Sets dictionary data.
*
* When dictionary data is already set / present, this method is no-op.
*
* Dictionary data MUST be provided before BrotliGetDictionary is invoked.
* This method is used ONLY in multi-client environment (e.g. C + Java),
* to reduce storage by sharing single dictionary between implementations.
*/
BROTLI_COMMON_API void BrotliSetDictionaryData(const uint8_t* data);
#define BROTLI_MIN_DICTIONARY_WORD_LENGTH 4
#define BROTLI_MAX_DICTIONARY_WORD_LENGTH 24
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */

558
BaseTools/Source/C/BrotliCompress/common/platform.h Normal file
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@ -0,0 +1,558 @@
/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific features and build options.
Build options are:
* BROTLI_BUILD_32_BIT disables 64-bit optimizations
* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
read and overlapping memcpy; this reduces decompression speed by 5%
* BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
* BROTLI_DEBUG dumps file name and line number when decoder detects stream
or memory error
* BROTLI_ENABLE_LOG enables asserts and dumps various state information
*/
#ifndef BROTLI_COMMON_PLATFORM_H_
#define BROTLI_COMMON_PLATFORM_H_
#include <string.h> /* memcpy */
#include <stdlib.h> /* malloc, free */
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(OS_LINUX) || defined(OS_CYGWIN)
#include <endian.h>
#elif defined(OS_FREEBSD)
#include <machine/endian.h>
#elif defined(OS_MACOSX)
#include <machine/endian.h>
/* Let's try and follow the Linux convention */
#define BROTLI_X_BYTE_ORDER BYTE_ORDER
#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN
#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
#endif
#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
#include <assert.h>
#include <stdio.h>
#endif
/* The following macros were borrowed from https://github.com/nemequ/hedley
* with permission of original author - Evan Nemerson <evan@nemerson.com> */
/* >>> >>> >>> hedley macros */
/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable
compilers.
To apply compiler hint, enclose the branching condition into macros, like this:
if (BROTLI_PREDICT_TRUE(zero == 0)) {
// main execution path
} else {
// compiler should place this code outside of main execution path
}
OR:
if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) {
// compiler should place this code outside of main execution path
}
*/
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 12, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(7, 3, 0) || \
BROTLI_TINYC_VERSION_CHECK(0, 9, 27)
#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0))
#else
#define BROTLI_PREDICT_FALSE(x) (x)
#define BROTLI_PREDICT_TRUE(x) (x)
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!defined(__cplusplus)
#define BROTLI_RESTRICT restrict
#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \
BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \
(BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus))
#define BROTLI_RESTRICT __restrict
#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus)
#define BROTLI_RESTRICT _Restrict
#else
#define BROTLI_RESTRICT
#endif
#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
(defined(__cplusplus) && (__cplusplus >= 199711L))
#define BROTLI_MAYBE_INLINE inline
#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \
BROTLI_ARM_VERSION_CHECK(6, 2, 0)
#define BROTLI_MAYBE_INLINE __inline__
#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0)
#define BROTLI_MAYBE_INLINE __inline
#else
#define BROTLI_MAYBE_INLINE
#endif
#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__))
#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline
#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced")
#else
#define BROTLI_INLINE BROTLI_MAYBE_INLINE
#endif
#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__))
#define BROTLI_NOINLINE __attribute__((__noinline__))
#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0)
#define BROTLI_NOINLINE __declspec(noinline)
#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0)
#define BROTLI_NOINLINE _Pragma("noinline")
#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus)
#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;")
#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0)
#define BROTLI_NOINLINE _Pragma("inline=never")
#else
#define BROTLI_NOINLINE
#endif
/* BROTLI_INTERNAL could be defined to override visibility, e.g. for tests. */
#if !defined(BROTLI_INTERNAL)
#if defined(_WIN32) || defined(__CYGWIN__)
#define BROTLI_INTERNAL
#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && \
defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__))
#define BROTLI_INTERNAL __attribute__ ((visibility ("hidden")))
#else
#define BROTLI_INTERNAL
#endif
#endif
/* <<< <<< <<< end of hedley macros. */
#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused))
#else
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE
#endif
#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \
(defined(M_ARM) && (M_ARM == 7))
#define BROTLI_TARGET_ARMV7
#endif /* ARMv7 */
#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \
defined(__aarch64__) || defined(__ARM64_ARCH_8__)
#define BROTLI_TARGET_ARMV8_ANY
#if defined(__ARM_32BIT_STATE)
#define BROTLI_TARGET_ARMV8_32
#elif defined(__ARM_64BIT_STATE)
#define BROTLI_TARGET_ARMV8_64
#endif
#endif /* ARMv8 */
#if defined(__i386) || defined(_M_IX86)
#define BROTLI_TARGET_X86
#endif
#if defined(__x86_64__) || defined(_M_X64)
#define BROTLI_TARGET_X64
#endif
#if defined(__PPC64__)
#define BROTLI_TARGET_POWERPC64
#endif
#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64
#define BROTLI_TARGET_RISCV64
#endif
#if defined(BROTLI_BUILD_64_BIT)
#define BROTLI_64_BITS 1
#elif defined(BROTLI_BUILD_32_BIT)
#define BROTLI_64_BITS 0
#elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \
defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64)
#define BROTLI_64_BITS 1
#else
#define BROTLI_64_BITS 0
#endif
#if (BROTLI_64_BITS)
#define brotli_reg_t uint64_t
#else
#define brotli_reg_t uint32_t
#endif
#if defined(BROTLI_BUILD_BIG_ENDIAN)
#define BROTLI_BIG_ENDIAN 1
#elif defined(BROTLI_BUILD_LITTLE_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL)
/* Just break elif chain. */
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(_WIN32) || defined(BROTLI_TARGET_X64)
/* Win32 & x64 can currently always be assumed to be little endian */
#define BROTLI_LITTLE_ENDIAN 1
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define BROTLI_BIG_ENDIAN 1
#elif defined(BROTLI_X_BYTE_ORDER)
#if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN
#define BROTLI_LITTLE_ENDIAN 1
#elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN
#define BROTLI_BIG_ENDIAN 1
#endif
#endif /* BROTLI_X_BYTE_ORDER */
#if !defined(BROTLI_LITTLE_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 0
#endif
#if !defined(BROTLI_BIG_ENDIAN)
#define BROTLI_BIG_ENDIAN 0
#endif
#if defined(BROTLI_X_BYTE_ORDER)
#undef BROTLI_X_BYTE_ORDER
#undef BROTLI_X_LITTLE_ENDIAN
#undef BROTLI_X_BIG_ENDIAN
#endif
#if defined(BROTLI_BUILD_PORTABLE)
#define BROTLI_ALIGNED_READ (!!1)
#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \
defined(BROTLI_TARGET_RISCV64)
/* Allow unaligned read only for white-listed CPUs. */
#define BROTLI_ALIGNED_READ (!!0)
#else
#define BROTLI_ALIGNED_READ (!!1)
#endif
#if BROTLI_ALIGNED_READ
/* Portable unaligned memory access: read / write values via memcpy. */
static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
uint16_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
uint32_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
uint64_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
memcpy(p, &v, sizeof v);
}
#else /* BROTLI_ALIGNED_READ */
/* Unaligned memory access is allowed: just cast pointer to requested type. */
#if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
defined(MEMORY_SANITIZER)
/* Consider we have an unaligned load/store of 4 bytes from address 0x...05.
AddressSanitizer will treat it as a 3-byte access to the range 05:07 and
will miss a bug if 08 is the first unaddressable byte.
ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will
miss a race between this access and some other accesses to 08.
MemorySanitizer will correctly propagate the shadow on unaligned stores
and correctly report bugs on unaligned loads, but it may not properly
update and report the origin of the uninitialized memory.
For all three tools, replacing an unaligned access with a tool-specific
callback solves the problem. */
#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */
uint16_t __sanitizer_unaligned_load16(const void* p);
uint32_t __sanitizer_unaligned_load32(const void* p);
uint64_t __sanitizer_unaligned_load64(const void* p);
void __sanitizer_unaligned_store64(void* p, uint64_t v);
#if defined(__cplusplus)
} /* extern "C" */
#endif /* __cplusplus */
#define BrotliUnalignedRead16 __sanitizer_unaligned_load16
#define BrotliUnalignedRead32 __sanitizer_unaligned_load32
#define BrotliUnalignedRead64 __sanitizer_unaligned_load64
#define BrotliUnalignedWrite64 __sanitizer_unaligned_store64
#else
static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
return *(const uint16_t*)p;
}
static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) {
return *(const uint32_t*)p;
}
#if (BROTLI_64_BITS)
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
return *(const uint64_t*)p;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
*(uint64_t*)p = v;
}
#else /* BROTLI_64_BITS */
/* Avoid emitting LDRD / STRD, which require properly aligned address. */
/* If __attribute__(aligned) is available, use that. Otherwise, memcpy. */
#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)
typedef __attribute__((aligned(1))) uint64_t brotli_unaligned_uint64_t;
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
return (uint64_t) ((brotli_unaligned_uint64_t*) p)[0];
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p;
dwords[0] = (brotli_unaligned_uint64_t) v;
}
#else /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
uint64_t v;
memcpy(&v, p, sizeof(uint64_t));
return v;
}
static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
memcpy(p, &v, sizeof(uint64_t));
}
#endif /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
#endif /* BROTLI_64_BITS */
#endif /* ASAN / TSAN / MSAN */
#endif /* BROTLI_ALIGNED_READ */
#if BROTLI_LITTLE_ENDIAN
/* Straight endianness. Just read / write values. */
#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16
#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32
#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64
#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64
#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */
/* Explain compiler to byte-swap values. */
#define BROTLI_BSWAP16_(V) ((uint16_t)( \
(((V) & 0xFFU) << 8) | \
(((V) >> 8) & 0xFFU)))
static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
uint16_t value = BrotliUnalignedRead16(p);
return BROTLI_BSWAP16_(value);
}
#define BROTLI_BSWAP32_(V) ( \
(((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \
(((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU))
static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
uint32_t value = BrotliUnalignedRead32(p);
return BROTLI_BSWAP32_(value);
}
#define BROTLI_BSWAP64_(V) ( \
(((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \
(((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \
(((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \
(((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU))
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
uint64_t value = BrotliUnalignedRead64(p);
return BROTLI_BSWAP64_(value);
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
uint64_t value = BROTLI_BSWAP64_(v);
BrotliUnalignedWrite64(p, value);
}
#else /* BROTLI_LITTLE_ENDIAN */
/* Read / store values byte-wise; hopefully compiler will understand. */
static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
return (uint16_t)(in[0] | (in[1] << 8));
}
static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
uint32_t value = (uint32_t)(in[0]);
value |= (uint32_t)(in[1]) << 8;
value |= (uint32_t)(in[2]) << 16;
value |= (uint32_t)(in[3]) << 24;
return value;
}
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) {
const uint8_t* in = (const uint8_t*)p;
uint64_t value = (uint64_t)(in[0]);
value |= (uint64_t)(in[1]) << 8;
value |= (uint64_t)(in[2]) << 16;
value |= (uint64_t)(in[3]) << 24;
value |= (uint64_t)(in[4]) << 32;
value |= (uint64_t)(in[5]) << 40;
value |= (uint64_t)(in[6]) << 48;
value |= (uint64_t)(in[7]) << 56;
return value;
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
uint8_t* out = (uint8_t*)p;
out[0] = (uint8_t)v;
out[1] = (uint8_t)(v >> 8);
out[2] = (uint8_t)(v >> 16);
out[3] = (uint8_t)(v >> 24);
out[4] = (uint8_t)(v >> 32);
out[5] = (uint8_t)(v >> 40);
out[6] = (uint8_t)(v >> 48);
out[7] = (uint8_t)(v >> 56);
}
#endif /* BROTLI_LITTLE_ENDIAN */
/* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
#define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x))
#else
#define BROTLI_IS_CONSTANT(x) (!!0)
#endif
#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
#define BROTLI_HAS_UBFX (!!1)
#else
#define BROTLI_HAS_UBFX (!!0)
#endif
#if defined(BROTLI_ENABLE_LOG)
#define BROTLI_DCHECK(x) assert(x)
#define BROTLI_LOG(x) printf x
#else
#define BROTLI_DCHECK(x)
#define BROTLI_LOG(x)
#endif
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
fflush(stderr);
}
#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
#else
#define BROTLI_DUMP() (void)(0)
#endif
/* TODO: add appropriate icc/sunpro/arm/ibm/ti checks. */
#if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \
!defined(BROTLI_BUILD_NO_RBIT)
#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY)
/* TODO: detect ARMv6T2 and enable this code for it. */
static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) {
brotli_reg_t output;
__asm__("rbit %0, %1\n" : "=r"(output) : "r"(input));
return output;
}
#define BROTLI_RBIT(x) BrotliRBit(x)
#endif /* armv7 / armv8 */
#endif /* gcc || clang */
#if !defined(BROTLI_RBIT)
static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ }
#endif /* BROTLI_RBIT */
#define BROTLI_REPEAT(N, X) { \
if ((N & 1) != 0) {X;} \
if ((N & 2) != 0) {X; X;} \
if ((N & 4) != 0) {X; X; X; X;} \
}
#define BROTLI_UNUSED(X) (void)(X)
#define BROTLI_MIN_MAX(T) \
static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \
static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; }
BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int)
BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t)
#undef BROTLI_MIN_MAX
#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B)))
#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B)))
#define BROTLI_SWAP(T, A, I, J) { \
T __brotli_swap_tmp = (A)[(I)]; \
(A)[(I)] = (A)[(J)]; \
(A)[(J)] = __brotli_swap_tmp; \
}
/* Default brotli_alloc_func */
static void* BrotliDefaultAllocFunc(void* opaque, size_t size) {
BROTLI_UNUSED(opaque);
return malloc(size);
}
/* Default brotli_free_func */
static void BrotliDefaultFreeFunc(void* opaque, void* address) {
BROTLI_UNUSED(opaque);
free(address);
}
BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) {
BROTLI_UNUSED(&BrotliSuppressUnusedFunctions);
BROTLI_UNUSED(&BrotliUnalignedRead16);
BROTLI_UNUSED(&BrotliUnalignedRead32);
BROTLI_UNUSED(&BrotliUnalignedRead64);
BROTLI_UNUSED(&BrotliUnalignedWrite64);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE);
BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE);
BROTLI_UNUSED(&BrotliRBit);
BROTLI_UNUSED(&brotli_min_double);
BROTLI_UNUSED(&brotli_max_double);
BROTLI_UNUSED(&brotli_min_float);
BROTLI_UNUSED(&brotli_max_float);
BROTLI_UNUSED(&brotli_min_int);
BROTLI_UNUSED(&brotli_max_int);
BROTLI_UNUSED(&brotli_min_size_t);
BROTLI_UNUSED(&brotli_max_size_t);
BROTLI_UNUSED(&brotli_min_uint32_t);
BROTLI_UNUSED(&brotli_max_uint32_t);
BROTLI_UNUSED(&brotli_min_uint8_t);
BROTLI_UNUSED(&brotli_max_uint8_t);
BROTLI_UNUSED(&BrotliDefaultAllocFunc);
BROTLI_UNUSED(&BrotliDefaultFreeFunc);
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
BROTLI_UNUSED(&BrotliDump);
#endif
}
#endif /* BROTLI_COMMON_PLATFORM_H_ */

107
BaseTools/Source/C/BrotliCompress/common/port.h
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@ -1,107 +0,0 @@
/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific features and build options. */
#ifndef BROTLI_COMMON_PORT_H_
#define BROTLI_COMMON_PORT_H_
/* Compatibility with non-clang compilers. */
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
#define BROTLI_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
#else
#define BROTLI_GCC_VERSION 0
#endif
#if defined(__ICC)
#define BROTLI_ICC_VERSION __ICC
#else
#define BROTLI_ICC_VERSION 0
#endif
#if defined(BROTLI_BUILD_MODERN_COMPILER)
#define BROTLI_MODERN_COMPILER 1
#elif BROTLI_GCC_VERSION > 300 || BROTLI_ICC_VERSION >= 1600
#define BROTLI_MODERN_COMPILER 1
#else
#define BROTLI_MODERN_COMPILER 0
#endif
/* Define "PREDICT_TRUE" and "PREDICT_FALSE" macros for capable compilers.
To apply compiler hint, enclose the branching condition into macros, like this:
if (PREDICT_TRUE(zero == 0)) {
// main execution path
} else {
// compiler should place this code outside of main execution path
}
OR:
if (PREDICT_FALSE(something_rare_or_unexpected_happens)) {
// compiler should place this code outside of main execution path
}
*/
#if BROTLI_MODERN_COMPILER || __has_builtin(__builtin_expect)
#define PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
#define PREDICT_FALSE(x) (__builtin_expect(x, 0))
#else
#define PREDICT_FALSE(x) (x)
#define PREDICT_TRUE(x) (x)
#endif
#if BROTLI_MODERN_COMPILER || __has_attribute(always_inline)
#define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline))
#else
#define ATTRIBUTE_ALWAYS_INLINE
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
#define ATTRIBUTE_VISIBILITY_HIDDEN
#elif BROTLI_MODERN_COMPILER || __has_attribute(visibility)
#define ATTRIBUTE_VISIBILITY_HIDDEN __attribute__ ((visibility ("hidden")))
#else
#define ATTRIBUTE_VISIBILITY_HIDDEN
#endif
#ifndef BROTLI_INTERNAL
#define BROTLI_INTERNAL ATTRIBUTE_VISIBILITY_HIDDEN
#endif
#ifndef _MSC_VER
#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
__STDC_VERSION__ >= 199901L
#define BROTLI_INLINE inline ATTRIBUTE_ALWAYS_INLINE
#else
#define BROTLI_INLINE
#endif
#else /* _MSC_VER */
#define BROTLI_INLINE __forceinline
#endif /* _MSC_VER */
#if BROTLI_MODERN_COMPILER || __has_attribute(noinline)
#define BROTLI_NOINLINE __attribute__((noinline))
#else
#define BROTLI_NOINLINE
#endif
#define BROTLI_UNUSED(X) (void)(X)
#endif /* BROTLI_COMMON_PORT_H_ */

235
BaseTools/Source/C/BrotliCompress/common/transform.c Normal file
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@ -0,0 +1,235 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#include "./transform.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* RFC 7932 transforms string data */
static const char kPrefixSuffix[217] =
"\1 \2, \10 of the \4 of \2s \1.\5 and \4 "
/* 0x _0 _2 __5 _E _3 _6 _8 _E */
"in \1\"\4 to \2\">\1\n\2. \1]\5 for \3 a \6 "
/* 2x _3_ _5 _A_ _D_ _F _2 _4 _A _E */
"that \1\'\6 with \6 from \4 by \1(\6. T"
/* 4x _5_ _7 _E _5 _A _C */
"he \4 on \4 as \4 is \4ing \2\n\t\1:\3ed "
/* 6x _3 _8 _D _2 _7_ _ _A _C */
"\2=\"\4 at \3ly \1,\2=\'\5.com/\7. This \5"
/* 8x _0 _ _3 _8 _C _E _ _1 _7 _F */
" not \3er \3al \4ful \4ive \5less \4es"
/* Ax _5 _9 _D _2 _7 _D */
"t \4ize \2\xc2\xa0\4ous \5 the \2e \0";
/* Cx _2 _7___ ___ _A _F _5 _8 */
static const uint16_t kPrefixSuffixMap[50] = {
0x00, 0x02, 0x05, 0x0E, 0x13, 0x16, 0x18, 0x1E, 0x23, 0x25,
0x2A, 0x2D, 0x2F, 0x32, 0x34, 0x3A, 0x3E, 0x45, 0x47, 0x4E,
0x55, 0x5A, 0x5C, 0x63, 0x68, 0x6D, 0x72, 0x77, 0x7A, 0x7C,
0x80, 0x83, 0x88, 0x8C, 0x8E, 0x91, 0x97, 0x9F, 0xA5, 0xA9,
0xAD, 0xB2, 0xB7, 0xBD, 0xC2, 0xC7, 0xCA, 0xCF, 0xD5, 0xD8
};
/* RFC 7932 transforms */
static const uint8_t kTransformsData[] = {
49, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_IDENTITY, 0,
0, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_OMIT_FIRST_1, 49,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 47,
0, BROTLI_TRANSFORM_IDENTITY, 49,
4, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 6,
49, BROTLI_TRANSFORM_OMIT_FIRST_2, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 49,
1, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 1,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 7,
49, BROTLI_TRANSFORM_IDENTITY, 9,
48, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 8,
49, BROTLI_TRANSFORM_IDENTITY, 5,
49, BROTLI_TRANSFORM_IDENTITY, 10,
49, BROTLI_TRANSFORM_IDENTITY, 11,
49, BROTLI_TRANSFORM_OMIT_LAST_3, 49,
49, BROTLI_TRANSFORM_IDENTITY, 13,
49, BROTLI_TRANSFORM_IDENTITY, 14,
49, BROTLI_TRANSFORM_OMIT_FIRST_3, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_2, 49,
49, BROTLI_TRANSFORM_IDENTITY, 15,
49, BROTLI_TRANSFORM_IDENTITY, 16,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 12,
5, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 1,
49, BROTLI_TRANSFORM_OMIT_FIRST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 18,
49, BROTLI_TRANSFORM_IDENTITY, 17,
49, BROTLI_TRANSFORM_IDENTITY, 19,
49, BROTLI_TRANSFORM_IDENTITY, 20,
49, BROTLI_TRANSFORM_OMIT_FIRST_5, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_6, 49,
47, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 22,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 23,
49, BROTLI_TRANSFORM_IDENTITY, 24,
49, BROTLI_TRANSFORM_IDENTITY, 25,
49, BROTLI_TRANSFORM_OMIT_LAST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 26,
49, BROTLI_TRANSFORM_IDENTITY, 27,
49, BROTLI_TRANSFORM_IDENTITY, 28,
0, BROTLI_TRANSFORM_IDENTITY, 12,
49, BROTLI_TRANSFORM_IDENTITY, 29,
49, BROTLI_TRANSFORM_OMIT_FIRST_9, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_6, 49,
49, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_OMIT_LAST_8, 49,
49, BROTLI_TRANSFORM_IDENTITY, 31,
49, BROTLI_TRANSFORM_IDENTITY, 32,
47, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_OMIT_LAST_5, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_9, 49,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 8,
5, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 10,
49, BROTLI_TRANSFORM_IDENTITY, 30,
0, BROTLI_TRANSFORM_IDENTITY, 5,
35, BROTLI_TRANSFORM_IDENTITY, 49,
47, BROTLI_TRANSFORM_IDENTITY, 2,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 17,
49, BROTLI_TRANSFORM_IDENTITY, 36,
49, BROTLI_TRANSFORM_IDENTITY, 33,
5, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_IDENTITY, 37,
0, BROTLI_TRANSFORM_IDENTITY, 30,
49, BROTLI_TRANSFORM_IDENTITY, 38,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_IDENTITY, 39,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 8,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
0, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_IDENTITY, 40,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
49, BROTLI_TRANSFORM_IDENTITY, 41,
49, BROTLI_TRANSFORM_IDENTITY, 42,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 17,
49, BROTLI_TRANSFORM_IDENTITY, 43,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 10,
0, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
49, BROTLI_TRANSFORM_IDENTITY, 44,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
45, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 33,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
49, BROTLI_TRANSFORM_IDENTITY, 46,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 33,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
};
static BrotliTransforms kBrotliTransforms = {
sizeof(kPrefixSuffix),
(const uint8_t*)kPrefixSuffix,
kPrefixSuffixMap,
sizeof(kTransformsData) / (3 * sizeof(kTransformsData[0])),
kTransformsData,
{0, 12, 27, 23, 42, 63, 56, 48, 59, 64}
};
const BrotliTransforms* BrotliGetTransforms(void) {
return &kBrotliTransforms;
}
static int ToUpperCase(uint8_t* p) {
if (p[0] < 0xC0) {
if (p[0] >= 'a' && p[0] <= 'z') {
p[0] ^= 32;
}
return 1;
}
/* An overly simplified uppercasing model for UTF-8. */
if (p[0] < 0xE0) {
p[1] ^= 32;
return 2;
}
/* An arbitrary transform for three byte characters. */
p[2] ^= 5;
return 3;
}
int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len,
const BrotliTransforms* transforms, int transfom_idx) {
int idx = 0;
const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, transfom_idx);
uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, transfom_idx);
const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, transfom_idx);
{
int prefix_len = *prefix++;
while (prefix_len--) { dst[idx++] = *prefix++; }
}
{
const int t = type;
int i = 0;
if (t <= BROTLI_TRANSFORM_OMIT_LAST_9) {
len -= t;
} else if (t >= BROTLI_TRANSFORM_OMIT_FIRST_1
&& t <= BROTLI_TRANSFORM_OMIT_FIRST_9) {
int skip = t - (BROTLI_TRANSFORM_OMIT_FIRST_1 - 1);
word += skip;
len -= skip;
}
while (i < len) { dst[idx++] = word[i++]; }
if (t == BROTLI_TRANSFORM_UPPERCASE_FIRST) {
ToUpperCase(&dst[idx - len]);
} else if (t == BROTLI_TRANSFORM_UPPERCASE_ALL) {
uint8_t* uppercase = &dst[idx - len];
while (len > 0) {
int step = ToUpperCase(uppercase);
uppercase += step;
len -= step;
}
}
}
{
int suffix_len = *suffix++;
while (suffix_len--) { dst[idx++] = *suffix++; }
return idx;
}
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

80
BaseTools/Source/C/BrotliCompress/common/transform.h Normal file
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@ -0,0 +1,80 @@
/* transforms is a part of ABI, but not API.
It means that there are some functions that are supposed to be in "common"
library, but header itself is not placed into include/brotli. This way,
aforementioned functions will be available only to brotli internals.
*/
#ifndef BROTLI_COMMON_TRANSFORM_H_
#define BROTLI_COMMON_TRANSFORM_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
enum BrotliWordTransformType {
BROTLI_TRANSFORM_IDENTITY = 0,
BROTLI_TRANSFORM_OMIT_LAST_1 = 1,
BROTLI_TRANSFORM_OMIT_LAST_2 = 2,
BROTLI_TRANSFORM_OMIT_LAST_3 = 3,
BROTLI_TRANSFORM_OMIT_LAST_4 = 4,
BROTLI_TRANSFORM_OMIT_LAST_5 = 5,
BROTLI_TRANSFORM_OMIT_LAST_6 = 6,
BROTLI_TRANSFORM_OMIT_LAST_7 = 7,
BROTLI_TRANSFORM_OMIT_LAST_8 = 8,
BROTLI_TRANSFORM_OMIT_LAST_9 = 9,
BROTLI_TRANSFORM_UPPERCASE_FIRST = 10,
BROTLI_TRANSFORM_UPPERCASE_ALL = 11,
BROTLI_TRANSFORM_OMIT_FIRST_1 = 12,
BROTLI_TRANSFORM_OMIT_FIRST_2 = 13,
BROTLI_TRANSFORM_OMIT_FIRST_3 = 14,
BROTLI_TRANSFORM_OMIT_FIRST_4 = 15,
BROTLI_TRANSFORM_OMIT_FIRST_5 = 16,
BROTLI_TRANSFORM_OMIT_FIRST_6 = 17,
BROTLI_TRANSFORM_OMIT_FIRST_7 = 18,
BROTLI_TRANSFORM_OMIT_FIRST_8 = 19,
BROTLI_TRANSFORM_OMIT_FIRST_9 = 20,
BROTLI_NUM_TRANSFORM_TYPES /* Counts transforms, not a transform itself. */
};
#define BROTLI_TRANSFORMS_MAX_CUT_OFF BROTLI_TRANSFORM_OMIT_LAST_9
typedef struct BrotliTransforms {
uint16_t prefix_suffix_size;
/* Last character must be null, so prefix_suffix_size must be at least 1. */
const uint8_t* prefix_suffix;
const uint16_t* prefix_suffix_map;
uint32_t num_transforms;
/* Each entry is a [prefix_id, transform, suffix_id] triplet. */
const uint8_t* transforms;
/* Indices of transforms like ["", BROTLI_TRANSFORM_OMIT_LAST_#, ""].
0-th element corresponds to ["", BROTLI_TRANSFORM_IDENTITY, ""].
-1, if cut-off transform does not exist. */
int16_t cutOffTransforms[BROTLI_TRANSFORMS_MAX_CUT_OFF + 1];
} BrotliTransforms;
/* T is BrotliTransforms*; result is uint8_t. */
#define BROTLI_TRANSFORM_PREFIX_ID(T, I) ((T)->transforms[((I) * 3) + 0])
#define BROTLI_TRANSFORM_TYPE(T, I) ((T)->transforms[((I) * 3) + 1])
#define BROTLI_TRANSFORM_SUFFIX_ID(T, I) ((T)->transforms[((I) * 3) + 2])
/* T is BrotliTransforms*; result is const uint8_t*. */
#define BROTLI_TRANSFORM_PREFIX(T, I) (&(T)->prefix_suffix[ \
(T)->prefix_suffix_map[BROTLI_TRANSFORM_PREFIX_ID(T, I)]])
#define BROTLI_TRANSFORM_SUFFIX(T, I) (&(T)->prefix_suffix[ \
(T)->prefix_suffix_map[BROTLI_TRANSFORM_SUFFIX_ID(T, I)]])
BROTLI_COMMON_API const BrotliTransforms* BrotliGetTransforms(void);
BROTLI_COMMON_API int BrotliTransformDictionaryWord(
uint8_t* dst, const uint8_t* word, int len,
const BrotliTransforms* transforms, int transform_idx);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_COMMON_TRANSFORM_H_ */

58
BaseTools/Source/C/BrotliCompress/common/types.h
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@ -1,58 +0,0 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Common types */
#ifndef BROTLI_COMMON_TYPES_H_
#define BROTLI_COMMON_TYPES_H_
#include <stddef.h> /* for size_t */
#if defined(_MSC_VER) && (_MSC_VER < 1600)
typedef __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
#else
#include <stdint.h>
#endif /* defined(_MSC_VER) && (_MSC_VER < 1600) */
#if (!defined(_MSC_VER) || (_MSC_VER >= 1800)) && \
(defined(__cplusplus) || (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L))
#include <stdbool.h>
#define BROTLI_BOOL bool
#define BROTLI_TRUE true
#define BROTLI_FALSE false
#define TO_BROTLI_BOOL(X) (!!(X))
#else
typedef enum {
BROTLI_FALSE = 0,
BROTLI_TRUE = !BROTLI_FALSE
} BROTLI_BOOL;
#define TO_BROTLI_BOOL(X) (!!(X) ? BROTLI_TRUE : BROTLI_FALSE)
#endif
#define MAKE_UINT64_T(high, low) ((((uint64_t)(high)) << 32) | low)
#define BROTLI_UINT32_MAX (~((uint32_t)0))
#define BROTLI_SIZE_MAX (~((size_t)0))
/* Allocating function pointer. Function MUST return 0 in the case of failure.
Otherwise it MUST return a valid pointer to a memory region of at least
size length. Neither items nor size are allowed to be 0.
opaque argument is a pointer provided by client and could be used to bind
function to specific object (memory pool). */
typedef void* (*brotli_alloc_func)(void* opaque, size_t size);
/* Deallocating function pointer. Function SHOULD be no-op in the case the
address is 0. */
typedef void (*brotli_free_func)(void* opaque, void* address);
#endif /* BROTLI_COMMON_TYPES_H_ */

26
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@ -0,0 +1,26 @@
/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Version definition. */
#ifndef BROTLI_COMMON_VERSION_H_
#define BROTLI_COMMON_VERSION_H_
/* This macro should only be used when library is compiled together with client.
If library is dynamically linked, use BrotliDecoderVersion and
BrotliEncoderVersion methods. */
/* Semantic version, calculated as (MAJOR << 24) | (MINOR << 12) | PATCH */
#define BROTLI_VERSION 0x1000006
/* This macro is used by build system to produce Libtool-friendly soname. See
https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
*/
/* ABI version, calculated as (CURRENT << 24) | (REVISION << 12) | AGE */
#define BROTLI_ABI_VERSION 0x1006000
#endif /* BROTLI_COMMON_VERSION_H_ */

6
BaseTools/Source/C/BrotliCompress/dec/bit_reader.c
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@ -8,8 +8,8 @@
#include "./bit_reader.h"
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -24,7 +24,7 @@ BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
size_t aligned_read_mask = (sizeof(br->val_) >> 1) - 1;
/* Fixing alignment after unaligned BrotliFillWindow would result accumulator
overflow. If unalignment is caused by BrotliSafeReadBits, then there is
enough space in accumulator to fix aligment. */
enough space in accumulator to fix alignment. */
if (!BROTLI_ALIGNED_READ) {
aligned_read_mask = 0;
}

162
BaseTools/Source/C/BrotliCompress/dec/bit_reader.h
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@ -11,22 +11,16 @@
#include <string.h> /* memcpy */
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#if (BROTLI_64_BITS)
#define BROTLI_SHORT_FILL_BIT_WINDOW_READ 4
typedef uint64_t reg_t;
#else
#define BROTLI_SHORT_FILL_BIT_WINDOW_READ 2
typedef uint32_t reg_t;
#endif
#define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1)
static const uint32_t kBitMask[33] = { 0x0000,
static const uint32_t kBitMask[33] = { 0x00000000,
0x00000001, 0x00000003, 0x00000007, 0x0000000F,
0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
@ -38,34 +32,35 @@ static const uint32_t kBitMask[33] = { 0x0000,
};
static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
if (IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
/* Masking with this expression turns to a single
"Unsigned Bit Field Extract" UBFX instruction on ARM. */
return ~((0xffffffffU) << n);
return ~((0xFFFFFFFFu) << n);
} else {
return kBitMask[n];
}
}
typedef struct {
reg_t val_; /* pre-fetched bits */
brotli_reg_t val_; /* pre-fetched bits */
uint32_t bit_pos_; /* current bit-reading position in val_ */
const uint8_t* next_in; /* the byte we're reading from */
size_t avail_in;
} BrotliBitReader;
typedef struct {
reg_t val_;
brotli_reg_t val_;
uint32_t bit_pos_;
const uint8_t* next_in;
size_t avail_in;
} BrotliBitReaderState;
/* Initializes the bitreader fields. */
/* Initializes the BrotliBitReader fields. */
BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* const br);
/* Ensures that accumulator is not empty. May consume one byte of input.
Returns 0 if data is required but there is no input available.
/* Ensures that accumulator is not empty.
May consume up to sizeof(brotli_reg_t) - 1 bytes of input.
Returns BROTLI_FALSE if data is required but there is no input available.
For BROTLI_ALIGNED_READ this function also prepares bit reader for aligned
reading. */
BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br);
@ -97,89 +92,34 @@ static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) {
return br->avail_in + (BrotliGetAvailableBits(br) >> 3);
}
/* Checks if there is at least num bytes left in the input ringbuffer (excluding
the bits remaining in br->val_). */
/* Checks if there is at least |num| bytes left in the input ring-buffer
(excluding the bits remaining in br->val_). */
static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount(
BrotliBitReader* const br, size_t num) {
return TO_BROTLI_BOOL(br->avail_in >= num);
}
static BROTLI_INLINE uint16_t BrotliLoad16LE(const uint8_t* in) {
if (BROTLI_LITTLE_ENDIAN) {
return *((const uint16_t*)in);
} else if (BROTLI_BIG_ENDIAN) {
uint16_t value = *((const uint16_t*)in);
return (uint16_t)(((value & 0xFFU) << 8) | ((value & 0xFF00U) >> 8));
} else {
return (uint16_t)(in[0] | (in[1] << 8));
}
}
static BROTLI_INLINE uint32_t BrotliLoad32LE(const uint8_t* in) {
if (BROTLI_LITTLE_ENDIAN) {
return *((const uint32_t*)in);
} else if (BROTLI_BIG_ENDIAN) {
uint32_t value = *((const uint32_t*)in);
return ((value & 0xFFU) << 24) | ((value & 0xFF00U) << 8) |
((value & 0xFF0000U) >> 8) | ((value & 0xFF000000U) >> 24);
} else {
uint32_t value = (uint32_t)(*(in++));
value |= (uint32_t)(*(in++)) << 8;
value |= (uint32_t)(*(in++)) << 16;
value |= (uint32_t)(*(in++)) << 24;
return value;
}
}
#if (BROTLI_64_BITS)
static BROTLI_INLINE uint64_t BrotliLoad64LE(const uint8_t* in) {
if (BROTLI_LITTLE_ENDIAN) {
return *((const uint64_t*)in);
} else if (BROTLI_BIG_ENDIAN) {
uint64_t value = *((const uint64_t*)in);
return
((value & 0xFFU) << 56) |
((value & 0xFF00U) << 40) |
((value & 0xFF0000U) << 24) |
((value & 0xFF000000U) << 8) |
((value & 0xFF00000000U) >> 8) |
((value & 0xFF0000000000U) >> 24) |
((value & 0xFF000000000000U) >> 40) |
((value & 0xFF00000000000000U) >> 56);
} else {
uint64_t value = (uint64_t)(*(in++));
value |= (uint64_t)(*(in++)) << 8;
value |= (uint64_t)(*(in++)) << 16;
value |= (uint64_t)(*(in++)) << 24;
value |= (uint64_t)(*(in++)) << 32;
value |= (uint64_t)(*(in++)) << 40;
value |= (uint64_t)(*(in++)) << 48;
value |= (uint64_t)(*(in++)) << 56;
return value;
}
}
#endif
/* Guarantees that there are at least n_bits + 1 bits in accumulator.
/* Guarantees that there are at least |n_bits| + 1 bits in accumulator.
Precondition: accumulator contains at least 1 bit.
n_bits should be in the range [1..24] for regular build. For portable
non-64-bit little endian build only 16 bits are safe to request. */
|n_bits| should be in the range [1..24] for regular build. For portable
non-64-bit little-endian build only 16 bits are safe to request. */
static BROTLI_INLINE void BrotliFillBitWindow(
BrotliBitReader* const br, uint32_t n_bits) {
#if (BROTLI_64_BITS)
if (!BROTLI_ALIGNED_READ && IS_CONSTANT(n_bits) && (n_bits <= 8)) {
if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
if (br->bit_pos_ >= 56) {
br->val_ >>= 56;
br->bit_pos_ ^= 56; /* here same as -= 56 because of the if condition */
br->val_ |= BrotliLoad64LE(br->next_in) << 8;
br->val_ |= BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 8;
br->avail_in -= 7;
br->next_in += 7;
}
} else if (!BROTLI_ALIGNED_READ && IS_CONSTANT(n_bits) && (n_bits <= 16)) {
} else if (
!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 16)) {
if (br->bit_pos_ >= 48) {
br->val_ >>= 48;
br->bit_pos_ ^= 48; /* here same as -= 48 because of the if condition */
br->val_ |= BrotliLoad64LE(br->next_in) << 16;
br->val_ |= BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 16;
br->avail_in -= 6;
br->next_in += 6;
}
@ -187,17 +127,17 @@ static BROTLI_INLINE void BrotliFillBitWindow(
if (br->bit_pos_ >= 32) {
br->val_ >>= 32;
br->bit_pos_ ^= 32; /* here same as -= 32 because of the if condition */
br->val_ |= ((uint64_t)BrotliLoad32LE(br->next_in)) << 32;
br->val_ |= ((uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in)) << 32;
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
}
#else
if (!BROTLI_ALIGNED_READ && IS_CONSTANT(n_bits) && (n_bits <= 8)) {
if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
if (br->bit_pos_ >= 24) {
br->val_ >>= 24;
br->bit_pos_ ^= 24; /* here same as -= 24 because of the if condition */
br->val_ |= BrotliLoad32LE(br->next_in) << 8;
br->val_ |= BROTLI_UNALIGNED_LOAD32LE(br->next_in) << 8;
br->avail_in -= 3;
br->next_in += 3;
}
@ -205,7 +145,7 @@ static BROTLI_INLINE void BrotliFillBitWindow(
if (br->bit_pos_ >= 16) {
br->val_ >>= 16;
br->bit_pos_ ^= 16; /* here same as -= 16 because of the if condition */
br->val_ |= ((uint32_t)BrotliLoad16LE(br->next_in)) << 16;
br->val_ |= ((uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in)) << 16;
br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
}
@ -213,13 +153,14 @@ static BROTLI_INLINE void BrotliFillBitWindow(
#endif
}
/* Mosltly like BrotliFillBitWindow, but guarantees only 16 bits and reads no
/* Mostly like BrotliFillBitWindow, but guarantees only 16 bits and reads no
more than BROTLI_SHORT_FILL_BIT_WINDOW_READ bytes of input. */
static BROTLI_INLINE void BrotliFillBitWindow16(BrotliBitReader* const br) {
BrotliFillBitWindow(br, 17);
}
/* Pulls one byte of input to accumulator. */
/* Tries to pull one byte of input to accumulator.
Returns BROTLI_FALSE if there is no input available. */
static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
if (br->avail_in == 0) {
return BROTLI_FALSE;
@ -237,8 +178,9 @@ static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
}
/* Returns currently available bits.
The number of valid bits could be calclulated by BrotliGetAvailableBits. */
static BROTLI_INLINE reg_t BrotliGetBitsUnmasked(BrotliBitReader* const br) {
The number of valid bits could be calculated by BrotliGetAvailableBits. */
static BROTLI_INLINE brotli_reg_t BrotliGetBitsUnmasked(
BrotliBitReader* const br) {
return br->val_ >> br->bit_pos_;
}
@ -250,15 +192,16 @@ static BROTLI_INLINE uint32_t BrotliGet16BitsUnmasked(
return (uint32_t)BrotliGetBitsUnmasked(br);
}
/* Returns the specified number of bits from br without advancing bit pos. */
/* Returns the specified number of bits from |br| without advancing bit
position. */
static BROTLI_INLINE uint32_t BrotliGetBits(
BrotliBitReader* const br, uint32_t n_bits) {
BrotliFillBitWindow(br, n_bits);
return (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
}
/* Tries to peek the specified amount of bits. Returns 0, if there is not
enough input. */
/* Tries to peek the specified amount of bits. Returns BROTLI_FALSE, if there
is not enough input. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
while (BrotliGetAvailableBits(br) < n_bits) {
@ -270,7 +213,7 @@ static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits(
return BROTLI_TRUE;
}
/* Advances the bit pos by n_bits. */
/* Advances the bit pos by |n_bits|. */
static BROTLI_INLINE void BrotliDropBits(
BrotliBitReader* const br, uint32_t n_bits) {
br->bit_pos_ += n_bits;
@ -289,17 +232,17 @@ static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) {
br->bit_pos_ += unused_bits;
}
/* Reads the specified number of bits from br and advances the bit pos.
Precondition: accumulator MUST contain at least n_bits. */
/* Reads the specified number of bits from |br| and advances the bit pos.
Precondition: accumulator MUST contain at least |n_bits|. */
static BROTLI_INLINE void BrotliTakeBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
*val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
BROTLI_LOG(("[BrotliReadBits] %d %d %d val: %6x\n",
(int)br->avail_in, (int)br->bit_pos_, n_bits, (int)*val));
(int)br->avail_in, (int)br->bit_pos_, (int)n_bits, (int)*val));
BrotliDropBits(br, n_bits);
}
/* Reads the specified number of bits from br and advances the bit pos.
/* Reads the specified number of bits from |br| and advances the bit pos.
Assumes that there is enough input to perform BrotliFillBitWindow. */
static BROTLI_INLINE uint32_t BrotliReadBits(
BrotliBitReader* const br, uint32_t n_bits) {
@ -319,8 +262,8 @@ static BROTLI_INLINE uint32_t BrotliReadBits(
}
}
/* Tries to read the specified amount of bits. Returns 0, if there is not
enough input. n_bits MUST be positive. */
/* Tries to read the specified amount of bits. Returns BROTLI_FALSE, if there
is not enough input. |n_bits| MUST be positive. */
static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
while (BrotliGetAvailableBits(br) < n_bits) {
@ -343,25 +286,8 @@ static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) {
return TO_BROTLI_BOOL(pad_bits == 0);
}
/* Peeks a byte at specified offset.
Precondition: bit reader is parked to a byte boundary.
Returns -1 if operation is not feasible. */
static BROTLI_INLINE int BrotliPeekByte(BrotliBitReader* br, size_t offset) {
uint32_t available_bits = BrotliGetAvailableBits(br);
size_t bytes_left = available_bits >> 3;
BROTLI_DCHECK((available_bits & 7) == 0);
if (offset < bytes_left) {
return (BrotliGetBitsUnmasked(br) >> (unsigned)(offset << 3)) & 0xFF;
}
offset -= bytes_left;
if (offset < br->avail_in) {
return br->next_in[offset];
}
return -1;
}
/* Copies remaining input bytes stored in the bit reader to the output. Value
num may not be larger than BrotliGetRemainingBytes. The bit reader must be
|num| may not be larger than BrotliGetRemainingBytes. The bit reader must be
warmed up again after this. */
static BROTLI_INLINE void BrotliCopyBytes(uint8_t* dest,
BrotliBitReader* br, size_t num) {

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188
BaseTools/Source/C/BrotliCompress/dec/decode.h
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@ -1,188 +0,0 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* API for Brotli decompression */
#ifndef BROTLI_DEC_DECODE_H_
#define BROTLI_DEC_DECODE_H_
#include "../common/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
typedef struct BrotliDecoderStateStruct BrotliDecoderState;
typedef enum {
/* Decoding error, e.g. corrupt input or memory allocation problem */
BROTLI_DECODER_RESULT_ERROR = 0,
/* Decoding successfully completed */
BROTLI_DECODER_RESULT_SUCCESS = 1,
/* Partially done; should be called again with more input */
BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT = 2,
/* Partially done; should be called again with more output */
BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT = 3
} BrotliDecoderResult;
#define BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE, SEPARATOR) \
BROTLI_ERROR_CODE(_, NO_ERROR, 0) SEPARATOR \
/* Same as BrotliDecoderResult values */ \
BROTLI_ERROR_CODE(_, SUCCESS, 1) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_INPUT, 2) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_OUTPUT, 3) SEPARATOR \
\
/* Errors caused by invalid input */ \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_NIBBLE, -1) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, RESERVED, -2) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_META_NIBBLE, -3) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_ALPHABET, -4) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_SAME, -5) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CL_SPACE, -6) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, HUFFMAN_SPACE, -7) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CONTEXT_MAP_REPEAT, -8) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_1, -9) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_2, -10) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, TRANSFORM, -11) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, DICTIONARY, -12) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, WINDOW_BITS, -13) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_1, -14) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_2, -15) SEPARATOR \
\
/* -16..-20 codes are reserved */ \
\
/* Memory allocation problems */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MODES, -21) SEPARATOR \
/* Literal, insert and distance trees together */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, TREE_GROUPS, -22) SEPARATOR \
/* -23..-24 codes are reserved for distinct tree groups */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MAP, -25) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_1, -26) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_2, -27) SEPARATOR \
/* -28..-29 codes are reserved for dynamic ringbuffer allocation */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, BLOCK_TYPE_TREES, -30) SEPARATOR \
\
/* "Impossible" states */ \
BROTLI_ERROR_CODE(_ERROR_, UNREACHABLE, -31)
typedef enum {
#define _BROTLI_COMMA ,
#define _BROTLI_ERROR_CODE_ENUM_ITEM(PREFIX, NAME, CODE) \
BROTLI_DECODER ## PREFIX ## NAME = CODE
BROTLI_DECODER_ERROR_CODES_LIST(_BROTLI_ERROR_CODE_ENUM_ITEM, _BROTLI_COMMA)
#undef _BROTLI_ERROR_CODE_ENUM_ITEM
#undef _BROTLI_COMMA
} BrotliDecoderErrorCode;
#define BROTLI_LAST_ERROR_CODE BROTLI_DECODER_ERROR_UNREACHABLE
/* Creates the instance of BrotliDecoderState and initializes it. |alloc_func|
and |free_func| MUST be both zero or both non-zero. In the case they are both
zero, default memory allocators are used. |opaque| is passed to |alloc_func|
and |free_func| when they are called. */
BrotliDecoderState* BrotliDecoderCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/* Deinitializes and frees BrotliDecoderState instance. */
void BrotliDecoderDestroyInstance(BrotliDecoderState* state);
/* Decompresses the data in |encoded_buffer| into |decoded_buffer|, and sets
|*decoded_size| to the decompressed length. */
BrotliDecoderResult BrotliDecoderDecompress(
size_t encoded_size, const uint8_t* encoded_buffer, size_t* decoded_size,
uint8_t* decoded_buffer);
/* Decompresses the data. Supports partial input and output.
Must be called with an allocated input buffer in |*next_in| and an allocated
output buffer in |*next_out|. The values |*available_in| and |*available_out|
must specify the allocated size in |*next_in| and |*next_out| respectively.
After each call, |*available_in| will be decremented by the amount of input
bytes consumed, and the |*next_in| pointer will be incremented by that
amount. Similarly, |*available_out| will be decremented by the amount of
output bytes written, and the |*next_out| pointer will be incremented by that
amount. |total_out|, if it is not a null-pointer, will be set to the number
of bytes decompressed since the last state initialization.
Input is never overconsumed, so |next_in| and |available_in| could be passed
to the next consumer after decoding is complete. */
BrotliDecoderResult BrotliDecoderDecompressStream(
BrotliDecoderState* s, size_t* available_in, const uint8_t** next_in,
size_t* available_out, uint8_t** next_out, size_t* total_out);
/* Fills the new state with a dictionary for LZ77, warming up the ringbuffer,
e.g. for custom static dictionaries for data formats.
Not to be confused with the built-in transformable dictionary of Brotli.
|size| should be less or equal to 2^24 (16MiB), otherwise the dictionary will
be ignored. The dictionary must exist in memory until decoding is done and
is owned by the caller. To use:
1) Allocate and initialize state with BrotliCreateInstance
2) Use BrotliSetCustomDictionary
3) Use BrotliDecompressStream
4) Clean up and free state with BrotliDestroyState
*/
void BrotliDecoderSetCustomDictionary(
BrotliDecoderState* s, size_t size, const uint8_t* dict);
/* Returns true, if decoder has some unconsumed output.
Otherwise returns false. */
BROTLI_BOOL BrotliDecoderHasMoreOutput(const BrotliDecoderState* s);
/* Returns true, if decoder has already received some input bytes.
Otherwise returns false. */
BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* s);
/* Returns true, if decoder is in a state where we reached the end of the input
and produced all of the output; returns false otherwise. */
BROTLI_BOOL BrotliDecoderIsFinished(const BrotliDecoderState* s);
/* Returns detailed error code after BrotliDecompressStream returns
BROTLI_DECODER_RESULT_ERROR. */
BrotliDecoderErrorCode BrotliDecoderGetErrorCode(const BrotliDecoderState* s);
const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c);
/* DEPRECATED >>> */
typedef enum {
BROTLI_RESULT_ERROR = 0,
BROTLI_RESULT_SUCCESS = 1,
BROTLI_RESULT_NEEDS_MORE_INPUT = 2,
BROTLI_RESULT_NEEDS_MORE_OUTPUT = 3
} BrotliResult;
typedef enum {
#define _BROTLI_COMMA ,
#define _BROTLI_ERROR_CODE_ENUM_ITEM(PREFIX, NAME, CODE) \
BROTLI ## PREFIX ## NAME = CODE
BROTLI_DECODER_ERROR_CODES_LIST(_BROTLI_ERROR_CODE_ENUM_ITEM, _BROTLI_COMMA)
#undef _BROTLI_ERROR_CODE_ENUM_ITEM
#undef _BROTLI_COMMA
} BrotliErrorCode;
typedef struct BrotliStateStruct BrotliState;
BrotliState* BrotliCreateState(
brotli_alloc_func alloc, brotli_free_func free, void* opaque);
void BrotliDestroyState(BrotliState* state);
BROTLI_BOOL BrotliDecompressedSize(
size_t encoded_size, const uint8_t* encoded_buffer, size_t* decoded_size);
BrotliResult BrotliDecompressBuffer(
size_t encoded_size, const uint8_t* encoded_buffer, size_t* decoded_size,
uint8_t* decoded_buffer);
BrotliResult BrotliDecompressStream(
size_t* available_in, const uint8_t** next_in, size_t* available_out,
uint8_t** next_out, size_t* total_out, BrotliState* s);
void BrotliSetCustomDictionary(
size_t size, const uint8_t* dict, BrotliState* s);
BROTLI_BOOL BrotliStateIsStreamStart(const BrotliState* s);
BROTLI_BOOL BrotliStateIsStreamEnd(const BrotliState* s);
BrotliErrorCode BrotliGetErrorCode(const BrotliState* s);
const char* BrotliErrorString(BrotliErrorCode c);
/* <<< DEPRECATED */
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_DECODE_H_ */

59
BaseTools/Source/C/BrotliCompress/dec/huffman.c
View File

@ -11,8 +11,8 @@
#include <string.h> /* memcpy, memset */
#include "../common/constants.h"
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -20,8 +20,9 @@ extern "C" {
#define BROTLI_REVERSE_BITS_MAX 8
#ifdef BROTLI_RBIT
#define BROTLI_REVERSE_BITS_BASE (32 - BROTLI_REVERSE_BITS_MAX)
#if defined(BROTLI_RBIT)
#define BROTLI_REVERSE_BITS_BASE \
((sizeof(brotli_reg_t) << 3) - BROTLI_REVERSE_BITS_MAX)
#else
#define BROTLI_REVERSE_BITS_BASE 0
static uint8_t kReverseBits[1 << BROTLI_REVERSE_BITS_MAX] = {
@ -61,13 +62,13 @@ static uint8_t kReverseBits[1 << BROTLI_REVERSE_BITS_MAX] = {
#endif /* BROTLI_RBIT */
#define BROTLI_REVERSE_BITS_LOWEST \
(1U << (BROTLI_REVERSE_BITS_MAX - 1 + BROTLI_REVERSE_BITS_BASE))
((brotli_reg_t)1 << (BROTLI_REVERSE_BITS_MAX - 1 + BROTLI_REVERSE_BITS_BASE))
/* Returns reverse(num >> BROTLI_REVERSE_BITS_BASE, BROTLI_REVERSE_BITS_MAX),
where reverse(value, len) is the bit-wise reversal of the len least
significant bits of value. */
static BROTLI_INLINE uint32_t BrotliReverseBits(uint32_t num) {
#ifdef BROTLI_RBIT
static BROTLI_INLINE brotli_reg_t BrotliReverseBits(brotli_reg_t num) {
#if defined(BROTLI_RBIT)
return BROTLI_RBIT(num);
#else
return kReverseBits[num];
@ -85,9 +86,9 @@ static BROTLI_INLINE void ReplicateValue(HuffmanCode* table,
} while (end > 0);
}
/* Returns the table width of the next 2nd level table. count is the histogram
of bit lengths for the remaining symbols, len is the code length of the next
processed symbol */
/* Returns the table width of the next 2nd level table. |count| is the histogram
of bit lengths for the remaining symbols, |len| is the code length of the
next processed symbol. */
static BROTLI_INLINE int NextTableBitSize(const uint16_t* const count,
int len, int root_bits) {
int left = 1 << (len - root_bits);
@ -103,12 +104,12 @@ static BROTLI_INLINE int NextTableBitSize(const uint16_t* const count,
void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table,
const uint8_t* const code_lengths,
uint16_t* count) {
HuffmanCode code; /* current table entry */
int symbol; /* symbol index in original or sorted table */
uint32_t key; /* prefix code */
uint32_t key_step; /* prefix code addend */
int step; /* step size to replicate values in current table */
int table_size; /* size of current table */
HuffmanCode code; /* current table entry */
int symbol; /* symbol index in original or sorted table */
brotli_reg_t key; /* prefix code */
brotli_reg_t key_step; /* prefix code addend */
int step; /* step size to replicate values in current table */
int table_size; /* size of current table */
int sorted[BROTLI_CODE_LENGTH_CODES]; /* symbols sorted by code length */
/* offsets in sorted table for each length */
int offset[BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH + 1];
@ -117,7 +118,7 @@ void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table,
BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH <=
BROTLI_REVERSE_BITS_MAX);
/* generate offsets into sorted symbol table by code length */
/* Generate offsets into sorted symbol table by code length. */
symbol = -1;
bits = 1;
BROTLI_REPEAT(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH, {
@ -128,7 +129,7 @@ void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table,
/* Symbols with code length 0 are placed after all other symbols. */
offset[0] = BROTLI_CODE_LENGTH_CODES - 1;
/* sort symbols by length, by symbol order within each length */
/* Sort symbols by length, by symbol order within each length. */
symbol = BROTLI_CODE_LENGTH_CODES;
do {
BROTLI_REPEAT(6, {
@ -143,13 +144,13 @@ void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table,
if (offset[0] == 0) {
code.bits = 0;
code.value = (uint16_t)sorted[0];
for (key = 0; key < (uint32_t)table_size; ++key) {
for (key = 0; key < (brotli_reg_t)table_size; ++key) {
table[key] = code;
}
return;
}
/* fill in table */
/* Fill in table. */
key = 0;
key_step = BROTLI_REVERSE_BITS_LOWEST;
symbol = 0;
@ -175,10 +176,10 @@ uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
HuffmanCode* table; /* next available space in table */
int len; /* current code length */
int symbol; /* symbol index in original or sorted table */
uint32_t key; /* prefix code */
uint32_t key_step; /* prefix code addend */
uint32_t sub_key; /* 2nd level table prefix code */
uint32_t sub_key_step; /* 2nd level table prefix code addend */
brotli_reg_t key; /* prefix code */
brotli_reg_t key_step; /* prefix code addend */
brotli_reg_t sub_key; /* 2nd level table prefix code */
brotli_reg_t sub_key_step; /* 2nd level table prefix code addend */
int step; /* step size to replicate values in current table */
int table_bits; /* key length of current table */
int table_size; /* size of current table */
@ -199,9 +200,8 @@ uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
table_size = 1 << table_bits;
total_size = table_size;
/* fill in root table */
/* let's reduce the table size to a smaller size if possible, and */
/* create the repetitions by memcpy if possible in the coming loop */
/* Fill in the root table. Reduce the table size to if possible,
and create the repetitions by memcpy. */
if (table_bits > max_length) {
table_bits = max_length;
table_size = 1 << table_bits;
@ -223,15 +223,14 @@ uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
key_step >>= 1;
} while (++bits <= table_bits);
/* if root_bits != table_bits we only created one fraction of the */
/* table, and we need to replicate it now. */
/* If root_bits != table_bits then replicate to fill the remaining slots. */
while (total_size != table_size) {
memcpy(&table[table_size], &table[0],
(size_t)table_size * sizeof(table[0]));
table_size <<= 1;
}
/* fill in 2nd level tables and add pointers to root table */
/* Fill in 2nd level tables and add pointers to root table. */
key_step = BROTLI_REVERSE_BITS_LOWEST >> (root_bits - 1);
sub_key = (BROTLI_REVERSE_BITS_LOWEST << 1);
sub_key_step = BROTLI_REVERSE_BITS_LOWEST;

24
BaseTools/Source/C/BrotliCompress/dec/huffman.h
View File

@ -9,8 +9,8 @@
#ifndef BROTLI_DEC_HUFFMAN_H_
#define BROTLI_DEC_HUFFMAN_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -19,10 +19,11 @@ extern "C" {
#define BROTLI_HUFFMAN_MAX_CODE_LENGTH 15
/* Maximum possible Huffman table size for an alphabet size of (index * 32),
* max code length 15 and root table bits 8. */
max code length 15 and root table bits 8. */
static const uint16_t kMaxHuffmanTableSize[] = {
256, 402, 436, 468, 500, 534, 566, 598, 630, 662, 694, 726, 758, 790, 822,
854, 886, 920, 952, 984, 1016, 1048, 1080};
854, 886, 920, 952, 984, 1016, 1048, 1080, 1112, 1144, 1176, 1208, 1240, 1272,
1304, 1336, 1368, 1400, 1432, 1464, 1496, 1528};
/* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */
#define BROTLI_HUFFMAN_MAX_SIZE_26 396
/* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */
@ -41,23 +42,26 @@ typedef struct {
BROTLI_INTERNAL void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* root_table,
const uint8_t* const code_lengths, uint16_t* count);
/* Builds Huffman lookup table assuming code lengths are in symbol order. */
/* Returns size of resulting table. */
/* Builds Huffman lookup table assuming code lengths are in symbol order.
Returns size of resulting table. */
BROTLI_INTERNAL uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
int root_bits, const uint16_t* const symbol_lists, uint16_t* count_arg);
/* Builds a simple Huffman table. The num_symbols parameter is to be */
/* interpreted as follows: 0 means 1 symbol, 1 means 2 symbols, 2 means 3 */
/* symbols, 3 means 4 symbols with lengths 2,2,2,2, 4 means 4 symbols with */
/* lengths 1,2,3,3. */
/* Builds a simple Huffman table. The |num_symbols| parameter is to be
interpreted as follows: 0 means 1 symbol, 1 means 2 symbols,
2 means 3 symbols, 3 means 4 symbols with lengths [2, 2, 2, 2],
4 means 4 symbols with lengths [1, 2, 3, 3]. */
BROTLI_INTERNAL uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table,
int root_bits, uint16_t* symbols, uint32_t num_symbols);
/* Contains a collection of Huffman trees with the same alphabet size. */
/* max_symbol is needed due to simple codes since log2(alphabet_size) could be
greater than log2(max_symbol). */
typedef struct {
HuffmanCode** htrees;
HuffmanCode* codes;
uint16_t alphabet_size;
uint16_t max_symbol;
uint16_t num_htrees;
} HuffmanTreeGroup;

159
BaseTools/Source/C/BrotliCompress/dec/port.h
View File

@ -1,159 +0,0 @@
/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific features and build options.
Build options are:
* BROTLI_BUILD_32_BIT disables 64-bit optimizations
* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
* BROTLI_BUILD_MODERN_COMPILER forces to use modern compilers built-ins,
features and attributes
* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
read and overlapping memcpy; this reduces decompression speed by 5%
* BROTLI_DEBUG dumps file name and line number when decoder detects stream
or memory error
* BROTLI_ENABLE_LOG enables asserts and dumps various state information
*/
#ifndef BROTLI_DEC_PORT_H_
#define BROTLI_DEC_PORT_H_
#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
#include <assert.h>
#include <stdio.h>
#endif
#include "../common/port.h"
#if defined(__arm__) || defined(__thumb__) || \
defined(_M_ARM) || defined(_M_ARMT)
#define BROTLI_TARGET_ARM
#if (defined(__ARM_ARCH) && (__ARM_ARCH >= 7)) || \
(defined(M_ARM) && (M_ARM >= 7))
#define BROTLI_TARGET_ARMV7
#endif /* ARMv7 */
#if defined(__aarch64__)
#define BROTLI_TARGET_ARMV8
#endif /* ARMv8 */
#endif /* ARM */
#if defined(__i386) || defined(_M_IX86)
#define BROTLI_TARGET_X86
#endif
#if defined(__x86_64__) || defined(_M_X64)
#define BROTLI_TARGET_X64
#endif
#if defined(__PPC64__)
#define BROTLI_TARGET_POWERPC64
#endif
#ifdef BROTLI_BUILD_PORTABLE
#define BROTLI_ALIGNED_READ (!!1)
#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \
defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8)
/* Allow unaligned read only for whitelisted CPUs. */
#define BROTLI_ALIGNED_READ (!!0)
#else
#define BROTLI_ALIGNED_READ (!!1)
#endif
/* IS_CONSTANT macros returns true for compile-time constant expressions. */
#if BROTLI_MODERN_COMPILER || __has_builtin(__builtin_constant_p)
#define IS_CONSTANT(x) (!!__builtin_constant_p(x))
#else
#define IS_CONSTANT(x) (!!0)
#endif
#ifdef BROTLI_ENABLE_LOG
#define BROTLI_DCHECK(x) assert(x)
#define BROTLI_LOG(x) printf x
#else
#define BROTLI_DCHECK(x)
#define BROTLI_LOG(x)
#endif
#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
fflush(stderr);
}
#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
#else
#define BROTLI_DUMP() (void)(0)
#endif
#if defined(BROTLI_BUILD_64_BIT)
#define BROTLI_64_BITS 1
#elif defined(BROTLI_BUILD_32_BIT)
#define BROTLI_64_BITS 0
#elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8) || \
defined(BROTLI_TARGET_POWERPC64)
#define BROTLI_64_BITS 1
#else
#define BROTLI_64_BITS 0
#endif
#if defined(BROTLI_BUILD_BIG_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 0
#define BROTLI_BIG_ENDIAN 1
#elif defined(BROTLI_BUILD_LITTLE_ENDIAN)
#define BROTLI_LITTLE_ENDIAN 1
#define BROTLI_BIG_ENDIAN 0
#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL)
#define BROTLI_LITTLE_ENDIAN 0
#define BROTLI_BIG_ENDIAN 0
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define BROTLI_LITTLE_ENDIAN 1
#define BROTLI_BIG_ENDIAN 0
#elif defined(_WIN32)
/* Win32 can currently always be assumed to be little endian */
#define BROTLI_LITTLE_ENDIAN 1
#define BROTLI_BIG_ENDIAN 0
#else
#if (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
#define BROTLI_BIG_ENDIAN 1
#else
#define BROTLI_BIG_ENDIAN 0
#endif
#define BROTLI_LITTLE_ENDIAN 0
#endif
#define BROTLI_REPEAT(N, X) { \
if ((N & 1) != 0) {X;} \
if ((N & 2) != 0) {X; X;} \
if ((N & 4) != 0) {X; X; X; X;} \
}
#if BROTLI_MODERN_COMPILER || defined(__llvm__)
#if defined(BROTLI_TARGET_ARMV7)
static BROTLI_INLINE unsigned BrotliRBit(unsigned input) {
unsigned output;
__asm__("rbit %0, %1\n" : "=r"(output) : "r"(input));
return output;
}
#define BROTLI_RBIT(x) BrotliRBit(x)
#endif /* armv7 */
#endif /* gcc || clang */
#if defined(BROTLI_TARGET_ARM)
#define BROTLI_HAS_UBFX (!!1)
#else
#define BROTLI_HAS_UBFX (!!0)
#endif
#define BROTLI_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L)
#define BROTLI_FREE(S, X) { \
S->free_func(S->memory_manager_opaque, X); \
X = NULL; \
}
#endif /* BROTLI_DEC_PORT_H_ */

9
BaseTools/Source/C/BrotliCompress/dec/prefix.h
View File

@ -5,17 +5,16 @@
*/
/* Lookup tables to map prefix codes to value ranges. This is used during
decoding of the block lengths, literal insertion lengths and copy lengths.
*/
decoding of the block lengths, literal insertion lengths and copy lengths. */
#ifndef BROTLI_DEC_PREFIX_H_
#define BROTLI_DEC_PREFIX_H_
#include "../common/constants.h"
#include "../common/types.h"
#include <brotli/types.h>
/* Represents the range of values belonging to a prefix code: */
/* [offset, offset + 2^nbits) */
/* Represents the range of values belonging to a prefix code:
[offset, offset + 2^nbits) */
struct PrefixCodeRange {
uint16_t offset;
uint8_t nbits;

90
BaseTools/Source/C/BrotliCompress/dec/state.c
View File

@ -8,32 +8,18 @@
#include <stdlib.h> /* free, malloc */
#include "../common/types.h"
#include <brotli/types.h>
#include "./huffman.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static void* DefaultAllocFunc(void* opaque, size_t size) {
BROTLI_UNUSED(opaque);
return malloc(size);
}
static void DefaultFreeFunc(void* opaque, void* address) {
BROTLI_UNUSED(opaque);
free(address);
}
void BrotliDecoderStateInit(BrotliDecoderState* s) {
BrotliDecoderStateInitWithCustomAllocators(s, 0, 0, 0);
}
void BrotliDecoderStateInitWithCustomAllocators(BrotliDecoderState* s,
BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) {
if (!alloc_func) {
s->alloc_func = DefaultAllocFunc;
s->free_func = DefaultFreeFunc;
s->alloc_func = BrotliDefaultAllocFunc;
s->free_func = BrotliDefaultFreeFunc;
s->memory_manager_opaque = 0;
} else {
s->alloc_func = alloc_func;
@ -41,8 +27,11 @@ void BrotliDecoderStateInitWithCustomAllocators(BrotliDecoderState* s,
s->memory_manager_opaque = opaque;
}
s->error_code = 0; /* BROTLI_DECODER_NO_ERROR */
BrotliInitBitReader(&s->br);
s->state = BROTLI_STATE_UNINITED;
s->large_window = 0;
s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE;
s->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE;
s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE;
@ -60,6 +49,9 @@ void BrotliDecoderStateInitWithCustomAllocators(BrotliDecoderState* s,
s->block_type_trees = NULL;
s->block_len_trees = NULL;
s->ringbuffer = NULL;
s->ringbuffer_size = 0;
s->new_ringbuffer_size = 0;
s->ringbuffer_mask = 0;
s->context_map = NULL;
s->context_modes = NULL;
@ -76,10 +68,12 @@ void BrotliDecoderStateInitWithCustomAllocators(BrotliDecoderState* s,
s->distance_hgroup.codes = NULL;
s->distance_hgroup.htrees = NULL;
s->custom_dict = NULL;
s->custom_dict_size = 0;
s->is_last_metablock = 0;
s->is_uncompressed = 0;
s->is_metadata = 0;
s->should_wrap_ringbuffer = 0;
s->canny_ringbuffer_allocation = 1;
s->window_bits = 0;
s->max_distance = 0;
s->dist_rb[0] = 16;
@ -93,14 +87,19 @@ void BrotliDecoderStateInitWithCustomAllocators(BrotliDecoderState* s,
/* Make small negative indexes addressable. */
s->symbol_lists = &s->symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1];
s->mtf_upper_bound = 255;
s->mtf_upper_bound = 63;
s->dictionary = BrotliGetDictionary();
s->transforms = BrotliGetTransforms();
return BROTLI_TRUE;
}
void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
s->meta_block_remaining_len = 0;
s->block_length[0] = 1U << 28;
s->block_length[1] = 1U << 28;
s->block_length[2] = 1U << 28;
s->block_length[0] = 1U << 24;
s->block_length[1] = 1U << 24;
s->block_length[2] = 1U << 24;
s->num_block_types[0] = 1;
s->num_block_types[1] = 1;
s->num_block_types[2] = 1;
@ -117,8 +116,7 @@ void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
s->literal_htree = NULL;
s->dist_context_map_slice = NULL;
s->dist_htree_index = 0;
s->context_lookup1 = NULL;
s->context_lookup2 = NULL;
s->context_lookup = NULL;
s->literal_hgroup.codes = NULL;
s->literal_hgroup.htrees = NULL;
s->insert_copy_hgroup.codes = NULL;
@ -128,39 +126,37 @@ void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) {
}
void BrotliDecoderStateCleanupAfterMetablock(BrotliDecoderState* s) {
BROTLI_FREE(s, s->context_modes);
BROTLI_FREE(s, s->context_map);
BROTLI_FREE(s, s->dist_context_map);
BrotliDecoderHuffmanTreeGroupRelease(s, &s->literal_hgroup);
BrotliDecoderHuffmanTreeGroupRelease(s, &s->insert_copy_hgroup);
BrotliDecoderHuffmanTreeGroupRelease(s, &s->distance_hgroup);
BROTLI_DECODER_FREE(s, s->context_modes);
BROTLI_DECODER_FREE(s, s->context_map);
BROTLI_DECODER_FREE(s, s->dist_context_map);
BROTLI_DECODER_FREE(s, s->literal_hgroup.htrees);
BROTLI_DECODER_FREE(s, s->insert_copy_hgroup.htrees);
BROTLI_DECODER_FREE(s, s->distance_hgroup.htrees);
}
void BrotliDecoderStateCleanup(BrotliDecoderState* s) {
BrotliDecoderStateCleanupAfterMetablock(s);
BROTLI_FREE(s, s->ringbuffer);
BROTLI_FREE(s, s->block_type_trees);
BROTLI_DECODER_FREE(s, s->ringbuffer);
BROTLI_DECODER_FREE(s, s->block_type_trees);
}
void BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
HuffmanTreeGroup* group, uint32_t alphabet_size, uint32_t ntrees) {
BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
HuffmanTreeGroup* group, uint32_t alphabet_size, uint32_t max_symbol,
uint32_t ntrees) {
/* Pack two allocations into one */
const size_t max_table_size = kMaxHuffmanTableSize[(alphabet_size + 31) >> 5];
const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size;
const size_t htree_size = sizeof(HuffmanCode*) * ntrees;
char* p = (char*)BROTLI_ALLOC(s, code_size + htree_size);
/* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */
HuffmanCode** p = (HuffmanCode**)BROTLI_DECODER_ALLOC(s,
code_size + htree_size);
group->alphabet_size = (uint16_t)alphabet_size;
group->max_symbol = (uint16_t)max_symbol;
group->num_htrees = (uint16_t)ntrees;
group->codes = (HuffmanCode*)p;
group->htrees = (HuffmanCode**)(p + code_size);
}
void BrotliDecoderHuffmanTreeGroupRelease(
BrotliDecoderState* s, HuffmanTreeGroup* group) {
BROTLI_FREE(s, group->codes);
group->htrees = NULL;
group->htrees = p;
group->codes = (HuffmanCode*)(&p[ntrees]);
return !!p;
}
#if defined(__cplusplus) || defined(c_plusplus)

82
BaseTools/Source/C/BrotliCompress/dec/state.h
View File

@ -10,10 +10,12 @@
#define BROTLI_DEC_STATE_H_
#include "../common/constants.h"
#include "../common/types.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include "../common/transform.h"
#include <brotli/types.h>
#include "./bit_reader.h"
#include "./huffman.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -21,6 +23,8 @@ extern "C" {
typedef enum {
BROTLI_STATE_UNINITED,
BROTLI_STATE_LARGE_WINDOW_BITS,
BROTLI_STATE_INITIALIZE,
BROTLI_STATE_METABLOCK_BEGIN,
BROTLI_STATE_METABLOCK_HEADER,
BROTLI_STATE_METABLOCK_HEADER_2,
@ -115,7 +119,6 @@ struct BrotliDecoderStateStruct {
int pos;
int max_backward_distance;
int max_backward_distance_minus_custom_dict_size;
int max_distance;
int ringbuffer_size;
int ringbuffer_mask;
@ -126,21 +129,22 @@ struct BrotliDecoderStateStruct {
uint8_t* ringbuffer;
uint8_t* ringbuffer_end;
HuffmanCode* htree_command;
const uint8_t* context_lookup1;
const uint8_t* context_lookup2;
const uint8_t* context_lookup;
uint8_t* context_map_slice;
uint8_t* dist_context_map_slice;
/* This ring buffer holds a few past copy distances that will be used by */
/* some special distance codes. */
/* This ring buffer holds a few past copy distances that will be used by
some special distance codes. */
HuffmanTreeGroup literal_hgroup;
HuffmanTreeGroup insert_copy_hgroup;
HuffmanTreeGroup distance_hgroup;
HuffmanCode* block_type_trees;
HuffmanCode* block_len_trees;
/* This is true if the literal context map histogram type always matches the
block type. It is then not needed to keep the context (faster decoding). */
block type. It is then not needed to keep the context (faster decoding). */
int trivial_literal_context;
/* Distance context is actual after command is decoded and before distance is
computed. After distance computation it is used as a temporary variable. */
int distance_context;
int meta_block_remaining_len;
uint32_t block_length_index;
@ -160,17 +164,17 @@ struct BrotliDecoderStateStruct {
int copy_length;
int distance_code;
/* For partial write operations */
size_t rb_roundtrips; /* How many times we went around the ringbuffer */
size_t partial_pos_out; /* How much output to the user in total (<= rb) */
/* For partial write operations. */
size_t rb_roundtrips; /* how many times we went around the ring-buffer */
size_t partial_pos_out; /* how much output to the user in total */
/* For ReadHuffmanCode */
/* For ReadHuffmanCode. */
uint32_t symbol;
uint32_t repeat;
uint32_t space;
HuffmanCode table[32];
/* List of of symbol chains. */
/* List of heads of symbol chains. */
uint16_t* symbol_lists;
/* Storage from symbol_lists. */
uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 +
@ -178,29 +182,26 @@ struct BrotliDecoderStateStruct {
/* Tails of symbol chains. */
int next_symbol[32];
uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES];
/* Population counts for the code lengths */
/* Population counts for the code lengths. */
uint16_t code_length_histo[16];
/* For HuffmanTreeGroupDecode */
/* For HuffmanTreeGroupDecode. */
int htree_index;
HuffmanCode* next;
/* For DecodeContextMap */
/* For DecodeContextMap. */
uint32_t context_index;
uint32_t max_run_length_prefix;
uint32_t code;
HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272];
/* For InverseMoveToFrontTransform */
/* For InverseMoveToFrontTransform. */
uint32_t mtf_upper_bound;
uint8_t mtf[256 + 4];
uint32_t mtf[64 + 1];
/* For custom dictionaries */
const uint8_t* custom_dict;
int custom_dict_size;
/* Less used attributes are at the end of this struct. */
/* less used attributes are in the end of this struct */
/* States inside function calls */
/* States inside function calls. */
BrotliRunningMetablockHeaderState substate_metablock_header;
BrotliRunningTreeGroupState substate_tree_group;
BrotliRunningContextMapState substate_context_map;
@ -209,35 +210,46 @@ struct BrotliDecoderStateStruct {
BrotliRunningDecodeUint8State substate_decode_uint8;
BrotliRunningReadBlockLengthState substate_read_block_length;
uint8_t is_last_metablock;
uint8_t is_uncompressed;
uint8_t is_metadata;
uint8_t size_nibbles;
unsigned int is_last_metablock : 1;
unsigned int is_uncompressed : 1;
unsigned int is_metadata : 1;
unsigned int should_wrap_ringbuffer : 1;
unsigned int canny_ringbuffer_allocation : 1;
unsigned int large_window : 1;
unsigned int size_nibbles : 8;
uint32_t window_bits;
int new_ringbuffer_size;
uint32_t num_literal_htrees;
uint8_t* context_map;
uint8_t* context_modes;
const BrotliDictionary* dictionary;
const BrotliTransforms* transforms;
uint32_t trivial_literal_contexts[8]; /* 256 bits */
};
typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal;
#define BrotliDecoderState BrotliDecoderStateInternal
BROTLI_INTERNAL void BrotliDecoderStateInit(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateInitWithCustomAllocators(
BrotliDecoderState* s, brotli_alloc_func alloc_func,
brotli_free_func free_func, void* opaque);
BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
BROTLI_INTERNAL void BrotliDecoderStateCleanup(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock(
BrotliDecoderState* s);
BROTLI_INTERNAL void BrotliDecoderHuffmanTreeGroupInit(
BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(
BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size,
uint32_t ntrees);
BROTLI_INTERNAL void BrotliDecoderHuffmanTreeGroupRelease(
BrotliDecoderState* s, HuffmanTreeGroup* group);
uint32_t max_symbol, uint32_t ntrees);
#define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L)
#define BROTLI_DECODER_FREE(S, X) { \
S->free_func(S->memory_manager_opaque, X); \
X = NULL; \
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */

300
BaseTools/Source/C/BrotliCompress/dec/transform.h
View File

@ -1,300 +0,0 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Transformations on dictionary words. */
#ifndef BROTLI_DEC_TRANSFORM_H_
#define BROTLI_DEC_TRANSFORM_H_
#include "../common/types.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
enum WordTransformType {
kIdentity = 0,
kOmitLast1 = 1,
kOmitLast2 = 2,
kOmitLast3 = 3,
kOmitLast4 = 4,
kOmitLast5 = 5,
kOmitLast6 = 6,
kOmitLast7 = 7,
kOmitLast8 = 8,
kOmitLast9 = 9,
kUppercaseFirst = 10,
kUppercaseAll = 11,
kOmitFirst1 = 12,
kOmitFirst2 = 13,
kOmitFirst3 = 14,
kOmitFirst4 = 15,
kOmitFirst5 = 16,
kOmitFirst6 = 17,
kOmitFirst7 = 18,
kOmitFirst8 = 19,
kOmitFirst9 = 20
};
typedef struct {
const uint8_t prefix_id;
const uint8_t transform;
const uint8_t suffix_id;
} Transform;
static const char kPrefixSuffix[208] =
"\0 \0, \0 of the \0 of \0s \0.\0 and \0 in \0\"\0 to \0\">\0\n\0. \0]\0"
" for \0 a \0 that \0\'\0 with \0 from \0 by \0(\0. The \0 on \0 as \0"
" is \0ing \0\n\t\0:\0ed \0=\"\0 at \0ly \0,\0=\'\0.com/\0. This \0"
" not \0er \0al \0ful \0ive \0less \0est \0ize \0\xc2\xa0\0ous ";
enum {
/* EMPTY = ""
SP = " "
DQUOT = "\""
SQUOT = "'"
CLOSEBR = "]"
OPEN = "("
SLASH = "/"
NBSP = non-breaking space "\0xc2\xa0"
*/
kPFix_EMPTY = 0,
kPFix_SP = 1,
kPFix_COMMASP = 3,
kPFix_SPofSPtheSP = 6,
kPFix_SPtheSP = 9,
kPFix_eSP = 12,
kPFix_SPofSP = 15,
kPFix_sSP = 20,
kPFix_DOT = 23,
kPFix_SPandSP = 25,
kPFix_SPinSP = 31,
kPFix_DQUOT = 36,
kPFix_SPtoSP = 38,
kPFix_DQUOTGT = 43,
kPFix_NEWLINE = 46,
kPFix_DOTSP = 48,
kPFix_CLOSEBR = 51,
kPFix_SPforSP = 53,
kPFix_SPaSP = 59,
kPFix_SPthatSP = 63,
kPFix_SQUOT = 70,
kPFix_SPwithSP = 72,
kPFix_SPfromSP = 79,
kPFix_SPbySP = 86,
kPFix_OPEN = 91,
kPFix_DOTSPTheSP = 93,
kPFix_SPonSP = 100,
kPFix_SPasSP = 105,
kPFix_SPisSP = 110,
kPFix_ingSP = 115,
kPFix_NEWLINETAB = 120,
kPFix_COLON = 123,
kPFix_edSP = 125,
kPFix_EQDQUOT = 129,
kPFix_SPatSP = 132,
kPFix_lySP = 137,
kPFix_COMMA = 141,
kPFix_EQSQUOT = 143,
kPFix_DOTcomSLASH = 146,
kPFix_DOTSPThisSP = 152,
kPFix_SPnotSP = 160,
kPFix_erSP = 166,
kPFix_alSP = 170,
kPFix_fulSP = 174,
kPFix_iveSP = 179,
kPFix_lessSP = 184,
kPFix_estSP = 190,
kPFix_izeSP = 195,
kPFix_NBSP = 200,
kPFix_ousSP = 203
};
static const Transform kTransforms[] = {
{ kPFix_EMPTY, kIdentity, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SP },
{ kPFix_SP, kIdentity, kPFix_SP },
{ kPFix_EMPTY, kOmitFirst1, kPFix_EMPTY },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_SPtheSP },
{ kPFix_SP, kIdentity, kPFix_EMPTY },
{ kPFix_sSP, kIdentity, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_SPofSP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SPandSP },
{ kPFix_EMPTY, kOmitFirst2, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast1, kPFix_EMPTY },
{ kPFix_COMMASP, kIdentity, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_COMMASP },
{ kPFix_SP, kUppercaseFirst, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_SPinSP },
{ kPFix_EMPTY, kIdentity, kPFix_SPtoSP },
{ kPFix_eSP, kIdentity, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_DQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_DOT },
{ kPFix_EMPTY, kIdentity, kPFix_DQUOTGT },
{ kPFix_EMPTY, kIdentity, kPFix_NEWLINE },
{ kPFix_EMPTY, kOmitLast3, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_CLOSEBR },
{ kPFix_EMPTY, kIdentity, kPFix_SPforSP },
{ kPFix_EMPTY, kOmitFirst3, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast2, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SPaSP },
{ kPFix_EMPTY, kIdentity, kPFix_SPthatSP },
{ kPFix_SP, kUppercaseFirst, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_DOTSP },
{ kPFix_DOT, kIdentity, kPFix_EMPTY },
{ kPFix_SP, kIdentity, kPFix_COMMASP },
{ kPFix_EMPTY, kOmitFirst4, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SPwithSP },
{ kPFix_EMPTY, kIdentity, kPFix_SQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_SPfromSP },
{ kPFix_EMPTY, kIdentity, kPFix_SPbySP },
{ kPFix_EMPTY, kOmitFirst5, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitFirst6, kPFix_EMPTY },
{ kPFix_SPtheSP, kIdentity, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast4, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_DOTSPTheSP },
{ kPFix_EMPTY, kUppercaseAll, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SPonSP },
{ kPFix_EMPTY, kIdentity, kPFix_SPasSP },
{ kPFix_EMPTY, kIdentity, kPFix_SPisSP },
{ kPFix_EMPTY, kOmitLast7, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast1, kPFix_ingSP },
{ kPFix_EMPTY, kIdentity, kPFix_NEWLINETAB },
{ kPFix_EMPTY, kIdentity, kPFix_COLON },
{ kPFix_SP, kIdentity, kPFix_DOTSP },
{ kPFix_EMPTY, kIdentity, kPFix_edSP },
{ kPFix_EMPTY, kOmitFirst9, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitFirst7, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast6, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_OPEN },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_COMMASP },
{ kPFix_EMPTY, kOmitLast8, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_SPatSP },
{ kPFix_EMPTY, kIdentity, kPFix_lySP },
{ kPFix_SPtheSP, kIdentity, kPFix_SPofSP },
{ kPFix_EMPTY, kOmitLast5, kPFix_EMPTY },
{ kPFix_EMPTY, kOmitLast9, kPFix_EMPTY },
{ kPFix_SP, kUppercaseFirst, kPFix_COMMASP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_DQUOT },
{ kPFix_DOT, kIdentity, kPFix_OPEN },
{ kPFix_EMPTY, kUppercaseAll, kPFix_SP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_DQUOTGT },
{ kPFix_EMPTY, kIdentity, kPFix_EQDQUOT },
{ kPFix_SP, kIdentity, kPFix_DOT },
{ kPFix_DOTcomSLASH, kIdentity, kPFix_EMPTY },
{ kPFix_SPtheSP, kIdentity, kPFix_SPofSPtheSP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_SQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_DOTSPThisSP },
{ kPFix_EMPTY, kIdentity, kPFix_COMMA },
{ kPFix_DOT, kIdentity, kPFix_SP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_OPEN },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_DOT },
{ kPFix_EMPTY, kIdentity, kPFix_SPnotSP },
{ kPFix_SP, kIdentity, kPFix_EQDQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_erSP },
{ kPFix_SP, kUppercaseAll, kPFix_SP },
{ kPFix_EMPTY, kIdentity, kPFix_alSP },
{ kPFix_SP, kUppercaseAll, kPFix_EMPTY },
{ kPFix_EMPTY, kIdentity, kPFix_EQSQUOT },
{ kPFix_EMPTY, kUppercaseAll, kPFix_DQUOT },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_DOTSP },
{ kPFix_SP, kIdentity, kPFix_OPEN },
{ kPFix_EMPTY, kIdentity, kPFix_fulSP },
{ kPFix_SP, kUppercaseFirst, kPFix_DOTSP },
{ kPFix_EMPTY, kIdentity, kPFix_iveSP },
{ kPFix_EMPTY, kIdentity, kPFix_lessSP },
{ kPFix_EMPTY, kUppercaseAll, kPFix_SQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_estSP },
{ kPFix_SP, kUppercaseFirst, kPFix_DOT },
{ kPFix_EMPTY, kUppercaseAll, kPFix_DQUOTGT },
{ kPFix_SP, kIdentity, kPFix_EQSQUOT },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_COMMA },
{ kPFix_EMPTY, kIdentity, kPFix_izeSP },
{ kPFix_EMPTY, kUppercaseAll, kPFix_DOT },
{ kPFix_NBSP, kIdentity, kPFix_EMPTY },
{ kPFix_SP, kIdentity, kPFix_COMMA },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_EQDQUOT },
{ kPFix_EMPTY, kUppercaseAll, kPFix_EQDQUOT },
{ kPFix_EMPTY, kIdentity, kPFix_ousSP },
{ kPFix_EMPTY, kUppercaseAll, kPFix_COMMASP },
{ kPFix_EMPTY, kUppercaseFirst, kPFix_EQSQUOT },
{ kPFix_SP, kUppercaseFirst, kPFix_COMMA },
{ kPFix_SP, kUppercaseAll, kPFix_EQDQUOT },
{ kPFix_SP, kUppercaseAll, kPFix_COMMASP },
{ kPFix_EMPTY, kUppercaseAll, kPFix_COMMA },
{ kPFix_EMPTY, kUppercaseAll, kPFix_OPEN },
{ kPFix_EMPTY, kUppercaseAll, kPFix_DOTSP },
{ kPFix_SP, kUppercaseAll, kPFix_DOT },
{ kPFix_EMPTY, kUppercaseAll, kPFix_EQSQUOT },
{ kPFix_SP, kUppercaseAll, kPFix_DOTSP },
{ kPFix_SP, kUppercaseFirst, kPFix_EQDQUOT },
{ kPFix_SP, kUppercaseAll, kPFix_EQSQUOT },
{ kPFix_SP, kUppercaseFirst, kPFix_EQSQUOT },
};
static const int kNumTransforms = sizeof(kTransforms) / sizeof(kTransforms[0]);
static int ToUpperCase(uint8_t* p) {
if (p[0] < 0xc0) {
if (p[0] >= 'a' && p[0] <= 'z') {
p[0] ^= 32;
}
return 1;
}
/* An overly simplified uppercasing model for utf-8. */
if (p[0] < 0xe0) {
p[1] ^= 32;
return 2;
}
/* An arbitrary transform for three byte characters. */
p[2] ^= 5;
return 3;
}
static BROTLI_NOINLINE int TransformDictionaryWord(
uint8_t* dst, const uint8_t* word, int len, int transform) {
int idx = 0;
{
const char* prefix = &kPrefixSuffix[kTransforms[transform].prefix_id];
while (*prefix) { dst[idx++] = (uint8_t)*prefix++; }
}
{
const int t = kTransforms[transform].transform;
int i = 0;
int skip = t - (kOmitFirst1 - 1);
if (skip > 0) {
word += skip;
len -= skip;
} else if (t <= kOmitLast9) {
len -= t;
}
while (i < len) { dst[idx++] = word[i++]; }
if (t == kUppercaseFirst) {
ToUpperCase(&dst[idx - len]);
} else if (t == kUppercaseAll) {
uint8_t* uppercase = &dst[idx - len];
while (len > 0) {
int step = ToUpperCase(uppercase);
uppercase += step;
len -= step;
}
}
}
{
const char* suffix = &kPrefixSuffix[kTransforms[transform].suffix_id];
while (*suffix) { dst[idx++] = (uint8_t)*suffix++; }
return idx;
}
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_TRANSFORM_H_ */

840
BaseTools/Source/C/BrotliCompress/enc/backward_references.c
View File

@ -8,208 +8,19 @@
#include "./backward_references.h"
#include <math.h> /* INFINITY */
#include <string.h> /* memcpy, memset */
#include "../common/constants.h"
#include "../common/types.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./fast_log.h"
#include "./find_match_length.h"
#include "./literal_cost.h"
#include "./dictionary_hash.h"
#include "./memory.h"
#include "./port.h"
#include "./prefix.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#ifdef INFINITY
static const float kInfinity = INFINITY;
#else
static const float kInfinity = 3.4028e38f;
#endif
void BrotliInitZopfliNodes(ZopfliNode* array, size_t length) {
ZopfliNode stub;
size_t i;
stub.length = 1;
stub.distance = 0;
stub.insert_length = 0;
stub.u.cost = kInfinity;
for (i = 0; i < length; ++i) array[i] = stub;
}
static BROTLI_INLINE uint32_t ZopfliNodeCopyLength(const ZopfliNode* self) {
return self->length & 0xffffff;
}
static BROTLI_INLINE uint32_t ZopfliNodeLengthCode(const ZopfliNode* self) {
const uint32_t modifier = self->length >> 24;
return ZopfliNodeCopyLength(self) + 9u - modifier;
}
static BROTLI_INLINE uint32_t ZopfliNodeCopyDistance(const ZopfliNode* self) {
return self->distance & 0x1ffffff;
}
static BROTLI_INLINE uint32_t ZopfliNodeDistanceCode(const ZopfliNode* self) {
const uint32_t short_code = self->distance >> 25;
return short_code == 0 ? ZopfliNodeCopyDistance(self) + 15 : short_code - 1;
}
static BROTLI_INLINE uint32_t ZopfliNodeCommandLength(const ZopfliNode* self) {
return ZopfliNodeCopyLength(self) + self->insert_length;
}
/* Histogram based cost model for zopflification. */
typedef struct ZopfliCostModel {
/* The insert and copy length symbols. */
float cost_cmd_[BROTLI_NUM_COMMAND_SYMBOLS];
float cost_dist_[BROTLI_NUM_DISTANCE_SYMBOLS];
/* Cumulative costs of literals per position in the stream. */
float* literal_costs_;
float min_cost_cmd_;
size_t num_bytes_;
} ZopfliCostModel;
static void InitZopfliCostModel(
MemoryManager* m, ZopfliCostModel* self, size_t num_bytes) {
self->num_bytes_ = num_bytes;
self->literal_costs_ = BROTLI_ALLOC(m, float, num_bytes + 2);
if (BROTLI_IS_OOM(m)) return;
}
static void CleanupZopfliCostModel(MemoryManager* m, ZopfliCostModel* self) {
BROTLI_FREE(m, self->literal_costs_);
}
static void SetCost(const uint32_t* histogram, size_t histogram_size,
float* cost) {
size_t sum = 0;
float log2sum;
size_t i;
for (i = 0; i < histogram_size; i++) {
sum += histogram[i];
}
log2sum = (float)FastLog2(sum);
for (i = 0; i < histogram_size; i++) {
if (histogram[i] == 0) {
cost[i] = log2sum + 2;
continue;
}
/* Shannon bits for this symbol. */
cost[i] = log2sum - (float)FastLog2(histogram[i]);
/* Cannot be coded with less than 1 bit */
if (cost[i] < 1) cost[i] = 1;
}
}
static void ZopfliCostModelSetFromCommands(ZopfliCostModel* self,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const Command* commands,
size_t num_commands,
size_t last_insert_len) {
uint32_t histogram_literal[BROTLI_NUM_LITERAL_SYMBOLS];
uint32_t histogram_cmd[BROTLI_NUM_COMMAND_SYMBOLS];
uint32_t histogram_dist[BROTLI_NUM_DISTANCE_SYMBOLS];
float cost_literal[BROTLI_NUM_LITERAL_SYMBOLS];
size_t pos = position - last_insert_len;
float min_cost_cmd = kInfinity;
size_t i;
float* cost_cmd = self->cost_cmd_;
memset(histogram_literal, 0, sizeof(histogram_literal));
memset(histogram_cmd, 0, sizeof(histogram_cmd));
memset(histogram_dist, 0, sizeof(histogram_dist));
for (i = 0; i < num_commands; i++) {
size_t inslength = commands[i].insert_len_;
size_t copylength = CommandCopyLen(&commands[i]);
size_t distcode = commands[i].dist_prefix_;
size_t cmdcode = commands[i].cmd_prefix_;
size_t j;
histogram_cmd[cmdcode]++;
if (cmdcode >= 128) histogram_dist[distcode]++;
for (j = 0; j < inslength; j++) {
histogram_literal[ringbuffer[(pos + j) & ringbuffer_mask]]++;
}
pos += inslength + copylength;
}
SetCost(histogram_literal, BROTLI_NUM_LITERAL_SYMBOLS, cost_literal);
SetCost(histogram_cmd, BROTLI_NUM_COMMAND_SYMBOLS, cost_cmd);
SetCost(histogram_dist, BROTLI_NUM_DISTANCE_SYMBOLS, self->cost_dist_);
for (i = 0; i < BROTLI_NUM_COMMAND_SYMBOLS; ++i) {
min_cost_cmd = BROTLI_MIN(float, min_cost_cmd, cost_cmd[i]);
}
self->min_cost_cmd_ = min_cost_cmd;
{
float* literal_costs = self->literal_costs_;
size_t num_bytes = self->num_bytes_;
literal_costs[0] = 0.0;
for (i = 0; i < num_bytes; ++i) {
literal_costs[i + 1] = literal_costs[i] +
cost_literal[ringbuffer[(position + i) & ringbuffer_mask]];
}
}
}
static void ZopfliCostModelSetFromLiteralCosts(ZopfliCostModel* self,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
float* literal_costs = self->literal_costs_;
float* cost_dist = self->cost_dist_;
float* cost_cmd = self->cost_cmd_;
size_t num_bytes = self->num_bytes_;
size_t i;
BrotliEstimateBitCostsForLiterals(position, num_bytes, ringbuffer_mask,
ringbuffer, &literal_costs[1]);
literal_costs[0] = 0.0;
for (i = 0; i < num_bytes; ++i) {
literal_costs[i + 1] += literal_costs[i];
}
for (i = 0; i < BROTLI_NUM_COMMAND_SYMBOLS; ++i) {
cost_cmd[i] = (float)FastLog2(11 + (uint32_t)i);
}
for (i = 0; i < BROTLI_NUM_DISTANCE_SYMBOLS; ++i) {
cost_dist[i] = (float)FastLog2(20 + (uint32_t)i);
}
self->min_cost_cmd_ = (float)FastLog2(11);
}
static BROTLI_INLINE float ZopfliCostModelGetCommandCost(
const ZopfliCostModel* self, uint16_t cmdcode) {
return self->cost_cmd_[cmdcode];
}
static BROTLI_INLINE float ZopfliCostModelGetDistanceCost(
const ZopfliCostModel* self, size_t distcode) {
return self->cost_dist_[distcode];
}
static BROTLI_INLINE float ZopfliCostModelGetLiteralCosts(
const ZopfliCostModel* self, size_t from, size_t to) {
return self->literal_costs_[to] - self->literal_costs_[from];
}
static BROTLI_INLINE float ZopfliCostModelGetMinCostCmd(
const ZopfliCostModel* self) {
return self->min_cost_cmd_;
}
static BROTLI_INLINE size_t ComputeDistanceCode(size_t distance,
size_t max_distance,
const int* dist_cache) {
@ -231,440 +42,15 @@ static BROTLI_INLINE size_t ComputeDistanceCode(size_t distance,
return 3;
}
}
return distance + 15;
}
/* REQUIRES: len >= 2, start_pos <= pos */
/* REQUIRES: cost < kInfinity, nodes[start_pos].cost < kInfinity */
/* Maintains the "ZopfliNode array invariant". */
static BROTLI_INLINE void UpdateZopfliNode(ZopfliNode* nodes, size_t pos,
size_t start_pos, size_t len, size_t len_code, size_t dist,
size_t short_code, float cost) {
ZopfliNode* next = &nodes[pos + len];
next->length = (uint32_t)(len | ((len + 9u - len_code) << 24));
next->distance = (uint32_t)(dist | (short_code << 25));
next->insert_length = (uint32_t)(pos - start_pos);
next->u.cost = cost;
}
typedef struct PosData {
size_t pos;
int distance_cache[4];
float costdiff;
float cost;
} PosData;
/* Maintains the smallest 8 cost difference together with their positions */
typedef struct StartPosQueue {
PosData q_[8];
size_t idx_;
} StartPosQueue;
static BROTLI_INLINE void InitStartPosQueue(StartPosQueue* self) {
self->idx_ = 0;
}
static size_t StartPosQueueSize(const StartPosQueue* self) {
return BROTLI_MIN(size_t, self->idx_, 8);
}
static void StartPosQueuePush(StartPosQueue* self, const PosData* posdata) {
size_t offset = ~(self->idx_++) & 7;
size_t len = StartPosQueueSize(self);
size_t i;
PosData* q = self->q_;
q[offset] = *posdata;
/* Restore the sorted order. In the list of |len| items at most |len - 1|
adjacent element comparisons / swaps are required. */
for (i = 1; i < len; ++i) {
if (q[offset & 7].costdiff > q[(offset + 1) & 7].costdiff) {
BROTLI_SWAP(PosData, q, offset & 7, (offset + 1) & 7);
}
++offset;
}
}
static const PosData* StartPosQueueAt(const StartPosQueue* self, size_t k) {
return &self->q_[(k - self->idx_) & 7];
}
/* Returns the minimum possible copy length that can improve the cost of any */
/* future position. */
static size_t ComputeMinimumCopyLength(const float start_cost,
const ZopfliNode* nodes,
const size_t num_bytes,
const size_t pos) {
/* Compute the minimum possible cost of reaching any future position. */
float min_cost = start_cost;
size_t len = 2;
size_t next_len_bucket = 4;
size_t next_len_offset = 10;
while (pos + len <= num_bytes && nodes[pos + len].u.cost <= min_cost) {
/* We already reached (pos + len) with no more cost than the minimum
possible cost of reaching anything from this pos, so there is no point in
looking for lengths <= len. */
++len;
if (len == next_len_offset) {
/* We reached the next copy length code bucket, so we add one more
extra bit to the minimum cost. */
min_cost += 1.0f;
next_len_offset += next_len_bucket;
next_len_bucket *= 2;
}
}
return len;
}
/* REQUIRES: nodes[pos].cost < kInfinity
REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */
static uint32_t ComputeDistanceShortcut(const size_t block_start,
const size_t pos,
const size_t max_backward,
const ZopfliNode* nodes) {
const size_t clen = ZopfliNodeCopyLength(&nodes[pos]);
const size_t ilen = nodes[pos].insert_length;
const size_t dist = ZopfliNodeCopyDistance(&nodes[pos]);
/* Since |block_start + pos| is the end position of the command, the copy part
starts from |block_start + pos - clen|. Distances that are greater than
this or greater than |max_backward| are static dictionary references, and
do not update the last distances. Also distance code 0 (last distance)
does not update the last distances. */
if (pos == 0) {
return 0;
} else if (dist + clen <= block_start + pos &&
dist <= max_backward &&
ZopfliNodeDistanceCode(&nodes[pos]) > 0) {
return (uint32_t)pos;
} else {
return nodes[pos - clen - ilen].u.shortcut;
}
}
/* Fills in dist_cache[0..3] with the last four distances (as defined by
Section 4. of the Spec) that would be used at (block_start + pos) if we
used the shortest path of commands from block_start, computed from
nodes[0..pos]. The last four distances at block_start are in
starting_dist_cach[0..3].
REQUIRES: nodes[pos].cost < kInfinity
REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */
static void ComputeDistanceCache(const size_t pos,
const int* starting_dist_cache,
const ZopfliNode* nodes,
int* dist_cache) {
int idx = 0;
size_t p = nodes[pos].u.shortcut;
while (idx < 4 && p > 0) {
const size_t ilen = nodes[p].insert_length;
const size_t clen = ZopfliNodeCopyLength(&nodes[p]);
const size_t dist = ZopfliNodeCopyDistance(&nodes[p]);
dist_cache[idx++] = (int)dist;
/* Because of prerequisite, p >= clen + ilen >= 2. */
p = nodes[p - clen - ilen].u.shortcut;
}
for (; idx < 4; ++idx) {
dist_cache[idx] = *starting_dist_cache++;
}
}
static void UpdateNodes(const size_t num_bytes,
const size_t block_start,
const size_t pos,
const uint8_t* ringbuffer,
const size_t ringbuffer_mask,
const BrotliEncoderParams* params,
const size_t max_backward_limit,
const int* starting_dist_cache,
const size_t num_matches,
const BackwardMatch* matches,
const ZopfliCostModel* model,
StartPosQueue* queue,
ZopfliNode* nodes) {
const size_t cur_ix = block_start + pos;
const size_t cur_ix_masked = cur_ix & ringbuffer_mask;
const size_t max_distance = BROTLI_MIN(size_t, cur_ix, max_backward_limit);
const size_t max_len = num_bytes - pos;
const size_t max_zopfli_len = MaxZopfliLen(params);
const size_t max_iters = MaxZopfliCandidates(params);
size_t min_len;
size_t k;
{
/* Save cost, because ComputeDistanceCache invalidates it. */
float node_cost = nodes[pos].u.cost;
nodes[pos].u.shortcut = ComputeDistanceShortcut(
block_start, pos, max_backward_limit, nodes);
if (node_cost <= ZopfliCostModelGetLiteralCosts(model, 0, pos)) {
PosData posdata;
posdata.pos = pos;
posdata.cost = node_cost;
posdata.costdiff = node_cost -
ZopfliCostModelGetLiteralCosts(model, 0, pos);
ComputeDistanceCache(
pos, starting_dist_cache, nodes, posdata.distance_cache);
StartPosQueuePush(queue, &posdata);
}
}
{
const PosData* posdata = StartPosQueueAt(queue, 0);
float min_cost = (posdata->cost + ZopfliCostModelGetMinCostCmd(model) +
ZopfliCostModelGetLiteralCosts(model, posdata->pos, pos));
min_len = ComputeMinimumCopyLength(min_cost, nodes, num_bytes, pos);
}
/* Go over the command starting positions in order of increasing cost
difference. */
for (k = 0; k < max_iters && k < StartPosQueueSize(queue); ++k) {
const PosData* posdata = StartPosQueueAt(queue, k);
const size_t start = posdata->pos;
const uint16_t inscode = GetInsertLengthCode(pos - start);
const float start_costdiff = posdata->costdiff;
const float base_cost = start_costdiff + (float)GetInsertExtra(inscode) +
ZopfliCostModelGetLiteralCosts(model, 0, pos);
/* Look for last distance matches using the distance cache from this
starting position. */
size_t best_len = min_len - 1;
size_t j = 0;
for (; j < BROTLI_NUM_DISTANCE_SHORT_CODES && best_len < max_len; ++j) {
const size_t idx = kDistanceCacheIndex[j];
const size_t backward =
(size_t)(posdata->distance_cache[idx] + kDistanceCacheOffset[j]);
size_t prev_ix = cur_ix - backward;
if (prev_ix >= cur_ix) {
continue;
}
if (PREDICT_FALSE(backward > max_distance)) {
continue;
}
prev_ix &= ringbuffer_mask;
if (cur_ix_masked + best_len > ringbuffer_mask ||
prev_ix + best_len > ringbuffer_mask ||
ringbuffer[cur_ix_masked + best_len] !=
ringbuffer[prev_ix + best_len]) {
continue;
}
{
const size_t len =
FindMatchLengthWithLimit(&ringbuffer[prev_ix],
&ringbuffer[cur_ix_masked],
max_len);
const float dist_cost = base_cost +
ZopfliCostModelGetDistanceCost(model, j);
size_t l;
for (l = best_len + 1; l <= len; ++l) {
const uint16_t copycode = GetCopyLengthCode(l);
const uint16_t cmdcode =
CombineLengthCodes(inscode, copycode, j == 0);
const float cost = (cmdcode < 128 ? base_cost : dist_cost) +
(float)GetCopyExtra(copycode) +
ZopfliCostModelGetCommandCost(model, cmdcode);
if (cost < nodes[pos + l].u.cost) {
UpdateZopfliNode(nodes, pos, start, l, l, backward, j + 1, cost);
}
best_len = l;
}
}
}
/* At higher iterations look only for new last distance matches, since
looking only for new command start positions with the same distances
does not help much. */
if (k >= 2) continue;
{
/* Loop through all possible copy lengths at this position. */
size_t len = min_len;
for (j = 0; j < num_matches; ++j) {
BackwardMatch match = matches[j];
size_t dist = match.distance;
BROTLI_BOOL is_dictionary_match = TO_BROTLI_BOOL(dist > max_distance);
/* We already tried all possible last distance matches, so we can use
normal distance code here. */
size_t dist_code = dist + 15;
uint16_t dist_symbol;
uint32_t distextra;
uint32_t distnumextra;
float dist_cost;
size_t max_match_len;
PrefixEncodeCopyDistance(dist_code, 0, 0, &dist_symbol, &distextra);
distnumextra = distextra >> 24;
dist_cost = base_cost + (float)distnumextra +
ZopfliCostModelGetDistanceCost(model, dist_symbol);
/* Try all copy lengths up until the maximum copy length corresponding
to this distance. If the distance refers to the static dictionary, or
the maximum length is long enough, try only one maximum length. */
max_match_len = BackwardMatchLength(&match);
if (len < max_match_len &&
(is_dictionary_match || max_match_len > max_zopfli_len)) {
len = max_match_len;
}
for (; len <= max_match_len; ++len) {
const size_t len_code =
is_dictionary_match ? BackwardMatchLengthCode(&match) : len;
const uint16_t copycode = GetCopyLengthCode(len_code);
const uint16_t cmdcode = CombineLengthCodes(inscode, copycode, 0);
const float cost = dist_cost + (float)GetCopyExtra(copycode) +
ZopfliCostModelGetCommandCost(model, cmdcode);
if (cost < nodes[pos + len].u.cost) {
UpdateZopfliNode(nodes, pos, start, len, len_code, dist, 0, cost);
}
}
}
}
}
}
static size_t ComputeShortestPathFromNodes(size_t num_bytes,
ZopfliNode* nodes) {
size_t index = num_bytes;
size_t num_commands = 0;
while (nodes[index].insert_length == 0 && nodes[index].length == 1) --index;
nodes[index].u.next = BROTLI_UINT32_MAX;
while (index != 0) {
size_t len = ZopfliNodeCommandLength(&nodes[index]);
index -= len;
nodes[index].u.next = (uint32_t)len;
num_commands++;
}
return num_commands;
}
void BrotliZopfliCreateCommands(const size_t num_bytes,
const size_t block_start,
const size_t max_backward_limit,
const ZopfliNode* nodes,
int* dist_cache,
size_t* last_insert_len,
Command* commands,
size_t* num_literals) {
size_t pos = 0;
uint32_t offset = nodes[0].u.next;
size_t i;
for (i = 0; offset != BROTLI_UINT32_MAX; i++) {
const ZopfliNode* next = &nodes[pos + offset];
size_t copy_length = ZopfliNodeCopyLength(next);
size_t insert_length = next->insert_length;
pos += insert_length;
offset = next->u.next;
if (i == 0) {
insert_length += *last_insert_len;
*last_insert_len = 0;
}
{
size_t distance = ZopfliNodeCopyDistance(next);
size_t len_code = ZopfliNodeLengthCode(next);
size_t max_distance =
BROTLI_MIN(size_t, block_start + pos, max_backward_limit);
BROTLI_BOOL is_dictionary = TO_BROTLI_BOOL(distance > max_distance);
size_t dist_code = ZopfliNodeDistanceCode(next);
InitCommand(
&commands[i], insert_length, copy_length, len_code, dist_code);
if (!is_dictionary && dist_code > 0) {
dist_cache[3] = dist_cache[2];
dist_cache[2] = dist_cache[1];
dist_cache[1] = dist_cache[0];
dist_cache[0] = (int)distance;
}
}
*num_literals += insert_length;
pos += copy_length;
}
*last_insert_len += num_bytes - pos;
}
static size_t ZopfliIterate(size_t num_bytes,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const BrotliEncoderParams* params,
const size_t max_backward_limit,
const int* dist_cache,
const ZopfliCostModel* model,
const uint32_t* num_matches,
const BackwardMatch* matches,
ZopfliNode* nodes) {
const size_t max_zopfli_len = MaxZopfliLen(params);
StartPosQueue queue;
size_t cur_match_pos = 0;
size_t i;
nodes[0].length = 0;
nodes[0].u.cost = 0;
InitStartPosQueue(&queue);
for (i = 0; i + 3 < num_bytes; i++) {
UpdateNodes(num_bytes, position, i, ringbuffer, ringbuffer_mask,
params, max_backward_limit, dist_cache, num_matches[i],
&matches[cur_match_pos], model, &queue, nodes);
cur_match_pos += num_matches[i];
/* The zopflification can be too slow in case of very long lengths, so in
such case skip it all, it does not cost a lot of compression ratio. */
if (num_matches[i] == 1 &&
BackwardMatchLength(&matches[cur_match_pos - 1]) > max_zopfli_len) {
i += BackwardMatchLength(&matches[cur_match_pos - 1]) - 1;
InitStartPosQueue(&queue);
}
}
return ComputeShortestPathFromNodes(num_bytes, nodes);
}
size_t BrotliZopfliComputeShortestPath(MemoryManager* m,
size_t num_bytes,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const BrotliEncoderParams* params,
const size_t max_backward_limit,
const int* dist_cache,
H10* hasher,
ZopfliNode* nodes) {
const size_t max_zopfli_len = MaxZopfliLen(params);
ZopfliCostModel model;
StartPosQueue queue;
BackwardMatch matches[MAX_NUM_MATCHES_H10];
const size_t store_end = num_bytes >= StoreLookaheadH10() ?
position + num_bytes - StoreLookaheadH10() + 1 : position;
size_t i;
nodes[0].length = 0;
nodes[0].u.cost = 0;
InitZopfliCostModel(m, &model, num_bytes);
if (BROTLI_IS_OOM(m)) return 0;
ZopfliCostModelSetFromLiteralCosts(
&model, position, ringbuffer, ringbuffer_mask);
InitStartPosQueue(&queue);
for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; i++) {
const size_t pos = position + i;
const size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
size_t num_matches = FindAllMatchesH10(hasher, ringbuffer, ringbuffer_mask,
pos, num_bytes - i, max_distance, params, matches);
if (num_matches > 0 &&
BackwardMatchLength(&matches[num_matches - 1]) > max_zopfli_len) {
matches[0] = matches[num_matches - 1];
num_matches = 1;
}
UpdateNodes(num_bytes, position, i, ringbuffer, ringbuffer_mask,
params, max_backward_limit, dist_cache, num_matches, matches,
&model, &queue, nodes);
if (num_matches == 1 && BackwardMatchLength(&matches[0]) > max_zopfli_len) {
/* Add the tail of the copy to the hasher. */
StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1, BROTLI_MIN(
size_t, pos + BackwardMatchLength(&matches[0]), store_end));
i += BackwardMatchLength(&matches[0]) - 1;
InitStartPosQueue(&queue);
}
}
CleanupZopfliCostModel(m, &model);
return ComputeShortestPathFromNodes(num_bytes, nodes);
return distance + BROTLI_NUM_DISTANCE_SHORT_CODES - 1;
}
#define EXPAND_CAT(a, b) CAT(a, b)
#define CAT(a, b) a ## b
#define FN(X) EXPAND_CAT(X, HASHER())
#define EXPORT_FN(X) EXPAND_CAT(X, EXPAND_CAT(PREFIX(), HASHER()))
#define PREFIX() N
#define HASHER() H2
/* NOLINTNEXTLINE(build/include) */
@ -691,21 +77,6 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m,
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H7
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H8
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H9
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H40
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
@ -721,170 +92,51 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m,
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H54
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H35
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H55
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#define HASHER() H65
/* NOLINTNEXTLINE(build/include) */
#include "./backward_references_inc.h"
#undef HASHER
#undef PREFIX
#undef EXPORT_FN
#undef FN
#undef CAT
#undef EXPAND_CAT
static BROTLI_NOINLINE void CreateZopfliBackwardReferences(
MemoryManager* m, size_t num_bytes, size_t position, BROTLI_BOOL is_last,
const uint8_t* ringbuffer, size_t ringbuffer_mask,
const BrotliEncoderParams* params, H10* hasher, int* dist_cache,
size_t* last_insert_len, Command* commands, size_t* num_commands,
size_t* num_literals) {
const size_t max_backward_limit = MaxBackwardLimit(params->lgwin);
ZopfliNode* nodes;
InitH10(m, hasher, ringbuffer, params, position, num_bytes, is_last);
if (BROTLI_IS_OOM(m)) return;
StitchToPreviousBlockH10(hasher, num_bytes, position,
ringbuffer, ringbuffer_mask);
nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
if (BROTLI_IS_OOM(m)) return;
BrotliInitZopfliNodes(nodes, num_bytes + 1);
*num_commands += BrotliZopfliComputeShortestPath(m, num_bytes, position,
ringbuffer, ringbuffer_mask, params, max_backward_limit,
dist_cache, hasher, nodes);
if (BROTLI_IS_OOM(m)) return;
BrotliZopfliCreateCommands(num_bytes, position, max_backward_limit, nodes,
dist_cache, last_insert_len, commands, num_literals);
BROTLI_FREE(m, nodes);
}
static BROTLI_NOINLINE void CreateHqZopfliBackwardReferences(
MemoryManager* m, size_t num_bytes, size_t position, BROTLI_BOOL is_last,
const uint8_t* ringbuffer, size_t ringbuffer_mask,
const BrotliEncoderParams* params, H10* hasher, int* dist_cache,
size_t* last_insert_len, Command* commands, size_t* num_commands,
size_t* num_literals) {
const size_t max_backward_limit = MaxBackwardLimit(params->lgwin);
uint32_t* num_matches = BROTLI_ALLOC(m, uint32_t, num_bytes);
size_t matches_size = 4 * num_bytes;
const size_t store_end = num_bytes >= StoreLookaheadH10() ?
position + num_bytes - StoreLookaheadH10() + 1 : position;
size_t cur_match_pos = 0;
size_t i;
size_t orig_num_literals;
size_t orig_last_insert_len;
int orig_dist_cache[4];
size_t orig_num_commands;
ZopfliCostModel model;
ZopfliNode* nodes;
BackwardMatch* matches = BROTLI_ALLOC(m, BackwardMatch, matches_size);
if (BROTLI_IS_OOM(m)) return;
InitH10(m, hasher, ringbuffer, params, position, num_bytes, is_last);
if (BROTLI_IS_OOM(m)) return;
StitchToPreviousBlockH10(hasher, num_bytes, position,
ringbuffer, ringbuffer_mask);
for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; ++i) {
const size_t pos = position + i;
size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
size_t max_length = num_bytes - i;
size_t num_found_matches;
size_t cur_match_end;
size_t j;
/* Ensure that we have enough free slots. */
BROTLI_ENSURE_CAPACITY(m, BackwardMatch, matches, matches_size,
cur_match_pos + MAX_NUM_MATCHES_H10);
if (BROTLI_IS_OOM(m)) return;
num_found_matches = FindAllMatchesH10(hasher, ringbuffer, ringbuffer_mask,
pos, max_length, max_distance, params, &matches[cur_match_pos]);
cur_match_end = cur_match_pos + num_found_matches;
for (j = cur_match_pos; j + 1 < cur_match_end; ++j) {
assert(BackwardMatchLength(&matches[j]) <
BackwardMatchLength(&matches[j + 1]));
assert(matches[j].distance > max_distance ||
matches[j].distance <= matches[j + 1].distance);
}
num_matches[i] = (uint32_t)num_found_matches;
if (num_found_matches > 0) {
const size_t match_len = BackwardMatchLength(&matches[cur_match_end - 1]);
if (match_len > MAX_ZOPFLI_LEN_QUALITY_11) {
const size_t skip = match_len - 1;
matches[cur_match_pos++] = matches[cur_match_end - 1];
num_matches[i] = 1;
/* Add the tail of the copy to the hasher. */
StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1,
BROTLI_MIN(size_t, pos + match_len, store_end));
memset(&num_matches[i + 1], 0, skip * sizeof(num_matches[0]));
i += skip;
} else {
cur_match_pos = cur_match_end;
}
}
}
orig_num_literals = *num_literals;
orig_last_insert_len = *last_insert_len;
memcpy(orig_dist_cache, dist_cache, 4 * sizeof(dist_cache[0]));
orig_num_commands = *num_commands;
nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
if (BROTLI_IS_OOM(m)) return;
InitZopfliCostModel(m, &model, num_bytes);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < 2; i++) {
BrotliInitZopfliNodes(nodes, num_bytes + 1);
if (i == 0) {
ZopfliCostModelSetFromLiteralCosts(
&model, position, ringbuffer, ringbuffer_mask);
} else {
ZopfliCostModelSetFromCommands(&model, position, ringbuffer,
ringbuffer_mask, commands, *num_commands - orig_num_commands,
orig_last_insert_len);
}
*num_commands = orig_num_commands;
*num_literals = orig_num_literals;
*last_insert_len = orig_last_insert_len;
memcpy(dist_cache, orig_dist_cache, 4 * sizeof(dist_cache[0]));
*num_commands += ZopfliIterate(num_bytes, position, ringbuffer,
ringbuffer_mask, params, max_backward_limit, dist_cache,
&model, num_matches, matches, nodes);
BrotliZopfliCreateCommands(num_bytes, position, max_backward_limit,
nodes, dist_cache, last_insert_len, commands, num_literals);
}
CleanupZopfliCostModel(m, &model);
BROTLI_FREE(m, nodes);
BROTLI_FREE(m, matches);
BROTLI_FREE(m, num_matches);
}
void BrotliCreateBackwardReferences(MemoryManager* m,
size_t num_bytes,
size_t position,
BROTLI_BOOL is_last,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const BrotliEncoderParams* params,
Hashers* hashers,
int* dist_cache,
size_t* last_insert_len,
Command* commands,
size_t* num_commands,
size_t* num_literals) {
if (params->quality == ZOPFLIFICATION_QUALITY) {
CreateZopfliBackwardReferences(
m, num_bytes, position, is_last, ringbuffer, ringbuffer_mask,
params, hashers->h10, dist_cache,
last_insert_len, commands, num_commands, num_literals);
return;
} else if (params->quality == HQ_ZOPFLIFICATION_QUALITY) {
CreateHqZopfliBackwardReferences(
m, num_bytes, position, is_last, ringbuffer, ringbuffer_mask,
params, hashers->h10, dist_cache,
last_insert_len, commands, num_commands, num_literals);
return;
}
switch (ChooseHasher(params)) {
#define _CASE(N) \
case N: \
CreateBackwardReferencesH ## N(m, num_bytes, position, is_last, \
ringbuffer, ringbuffer_mask, params, hashers->h ## N, dist_cache, \
last_insert_len, commands, num_commands, num_literals); \
break;
FOR_GENERIC_HASHERS(_CASE)
#undef _CASE
void BrotliCreateBackwardReferences(
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals) {
switch (params->hasher.type) {
#define CASE_(N) \
case N: \
CreateBackwardReferencesNH ## N( \
num_bytes, position, ringbuffer, \
ringbuffer_mask, params, hasher, dist_cache, \
last_insert_len, commands, num_commands, num_literals); \
return;
FOR_GENERIC_HASHERS(CASE_)
#undef CASE_
default:
break;
}
if (BROTLI_IS_OOM(m)) return;
}
#if defined(__cplusplus) || defined(c_plusplus)

77
BaseTools/Source/C/BrotliCompress/enc/backward_references.h
View File

@ -9,11 +9,12 @@
#ifndef BROTLI_ENC_BACKWARD_REFERENCES_H_
#define BROTLI_ENC_BACKWARD_REFERENCES_H_
#include "../common/types.h"
#include "../common/constants.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./hash.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -25,72 +26,10 @@ extern "C" {
CreateBackwardReferences calls, and must be incremented by the amount written
by this call. */
BROTLI_INTERNAL void BrotliCreateBackwardReferences(
MemoryManager* m, size_t num_bytes, size_t position, BROTLI_BOOL is_last,
const uint8_t* ringbuffer, size_t ringbuffer_mask,
const BrotliEncoderParams* params, Hashers* hashers, int* dist_cache,
size_t* last_insert_len, Command* commands, size_t* num_commands,
size_t* num_literals);
typedef struct ZopfliNode {
/* best length to get up to this byte (not including this byte itself)
highest 8 bit is used to reconstruct the length code */
uint32_t length;
/* distance associated with the length
highest 7 bit contains distance short code + 1 (or zero if no short code)
*/
uint32_t distance;
/* number of literal inserts before this copy */
uint32_t insert_length;
/* This union holds information used by dynamic-programming. During forward
pass |cost| it used to store the goal function. When node is processed its
|cost| is invalidated in favor of |shortcut|. On path backtracing pass
|next| is assigned the offset to next node on the path. */
union {
/* Smallest cost to get to this byte from the beginning, as found so far. */
float cost;
/* Offset to the next node on the path. Equals to command_length() of the
next node on the path. For last node equals to BROTLI_UINT32_MAX */
uint32_t next;
/* Node position that provides next distance for distance cache. */
uint32_t shortcut;
} u;
} ZopfliNode;
BROTLI_INTERNAL void BrotliInitZopfliNodes(ZopfliNode* array, size_t length);
/* Computes the shortest path of commands from position to at most
position + num_bytes.
On return, path->size() is the number of commands found and path[i] is the
length of the ith command (copy length plus insert length).
Note that the sum of the lengths of all commands can be less than num_bytes.
On return, the nodes[0..num_bytes] array will have the following
"ZopfliNode array invariant":
For each i in [1..num_bytes], if nodes[i].cost < kInfinity, then
(1) nodes[i].copy_length() >= 2
(2) nodes[i].command_length() <= i and
(3) nodes[i - nodes[i].command_length()].cost < kInfinity */
BROTLI_INTERNAL size_t BrotliZopfliComputeShortestPath(
MemoryManager* m, size_t num_bytes, size_t position,
const uint8_t* ringbuffer, size_t ringbuffer_mask,
const BrotliEncoderParams* params, const size_t max_backward_limit,
const int* dist_cache, H10* hasher, ZopfliNode* nodes);
BROTLI_INTERNAL void BrotliZopfliCreateCommands(const size_t num_bytes,
const size_t block_start,
const size_t max_backward_limit,
const ZopfliNode* nodes,
int* dist_cache,
size_t* last_insert_len,
Command* commands,
size_t* num_literals);
/* Maximum distance, see section 9.1. of the spec. */
static BROTLI_INLINE size_t MaxBackwardLimit(int lgwin) {
return (1u << lgwin) - 16;
}
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */

830
BaseTools/Source/C/BrotliCompress/enc/backward_references_hq.c Normal file
View File

@ -0,0 +1,830 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Function to find backward reference copies. */
#include "./backward_references_hq.h"
#include <string.h> /* memcpy, memset */
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./fast_log.h"
#include "./find_match_length.h"
#include "./literal_cost.h"
#include "./memory.h"
#include "./params.h"
#include "./prefix.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE 544
static const float kInfinity = 1.7e38f; /* ~= 2 ^ 127 */
static const uint32_t kDistanceCacheIndex[] = {
0, 1, 2, 3, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
};
static const int kDistanceCacheOffset[] = {
0, 0, 0, 0, -1, 1, -2, 2, -3, 3, -1, 1, -2, 2, -3, 3
};
void BrotliInitZopfliNodes(ZopfliNode* array, size_t length) {
ZopfliNode stub;
size_t i;
stub.length = 1;
stub.distance = 0;
stub.dcode_insert_length = 0;
stub.u.cost = kInfinity;
for (i = 0; i < length; ++i) array[i] = stub;
}
static BROTLI_INLINE uint32_t ZopfliNodeCopyLength(const ZopfliNode* self) {
return self->length & 0x1FFFFFF;
}
static BROTLI_INLINE uint32_t ZopfliNodeLengthCode(const ZopfliNode* self) {
const uint32_t modifier = self->length >> 25;
return ZopfliNodeCopyLength(self) + 9u - modifier;
}
static BROTLI_INLINE uint32_t ZopfliNodeCopyDistance(const ZopfliNode* self) {
return self->distance;
}
static BROTLI_INLINE uint32_t ZopfliNodeDistanceCode(const ZopfliNode* self) {
const uint32_t short_code = self->dcode_insert_length >> 27;
return short_code == 0 ?
ZopfliNodeCopyDistance(self) + BROTLI_NUM_DISTANCE_SHORT_CODES - 1 :
short_code - 1;
}
static BROTLI_INLINE uint32_t ZopfliNodeCommandLength(const ZopfliNode* self) {
return ZopfliNodeCopyLength(self) + (self->dcode_insert_length & 0x7FFFFFF);
}
/* Histogram based cost model for zopflification. */
typedef struct ZopfliCostModel {
/* The insert and copy length symbols. */
float cost_cmd_[BROTLI_NUM_COMMAND_SYMBOLS];
float* cost_dist_;
uint32_t distance_histogram_size;
/* Cumulative costs of literals per position in the stream. */
float* literal_costs_;
float min_cost_cmd_;
size_t num_bytes_;
} ZopfliCostModel;
static void InitZopfliCostModel(
MemoryManager* m, ZopfliCostModel* self, const BrotliDistanceParams* dist,
size_t num_bytes) {
uint32_t distance_histogram_size = dist->alphabet_size;
if (distance_histogram_size > BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE) {
distance_histogram_size = BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE;
}
self->num_bytes_ = num_bytes;
self->literal_costs_ = BROTLI_ALLOC(m, float, num_bytes + 2);
self->cost_dist_ = BROTLI_ALLOC(m, float, dist->alphabet_size);
self->distance_histogram_size = distance_histogram_size;
if (BROTLI_IS_OOM(m)) return;
}
static void CleanupZopfliCostModel(MemoryManager* m, ZopfliCostModel* self) {
BROTLI_FREE(m, self->literal_costs_);
BROTLI_FREE(m, self->cost_dist_);
}
static void SetCost(const uint32_t* histogram, size_t histogram_size,
BROTLI_BOOL literal_histogram, float* cost) {
size_t sum = 0;
size_t missing_symbol_sum;
float log2sum;
float missing_symbol_cost;
size_t i;
for (i = 0; i < histogram_size; i++) {
sum += histogram[i];
}
log2sum = (float)FastLog2(sum);
missing_symbol_sum = sum;
if (!literal_histogram) {
for (i = 0; i < histogram_size; i++) {
if (histogram[i] == 0) missing_symbol_sum++;
}
}
missing_symbol_cost = (float)FastLog2(missing_symbol_sum) + 2;
for (i = 0; i < histogram_size; i++) {
if (histogram[i] == 0) {
cost[i] = missing_symbol_cost;
continue;
}
/* Shannon bits for this symbol. */
cost[i] = log2sum - (float)FastLog2(histogram[i]);
/* Cannot be coded with less than 1 bit */
if (cost[i] < 1) cost[i] = 1;
}
}
static void ZopfliCostModelSetFromCommands(ZopfliCostModel* self,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const Command* commands,
size_t num_commands,
size_t last_insert_len) {
uint32_t histogram_literal[BROTLI_NUM_LITERAL_SYMBOLS];
uint32_t histogram_cmd[BROTLI_NUM_COMMAND_SYMBOLS];
uint32_t histogram_dist[BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE];
float cost_literal[BROTLI_NUM_LITERAL_SYMBOLS];
size_t pos = position - last_insert_len;
float min_cost_cmd = kInfinity;
size_t i;
float* cost_cmd = self->cost_cmd_;
memset(histogram_literal, 0, sizeof(histogram_literal));
memset(histogram_cmd, 0, sizeof(histogram_cmd));
memset(histogram_dist, 0, sizeof(histogram_dist));
for (i = 0; i < num_commands; i++) {
size_t inslength = commands[i].insert_len_;
size_t copylength = CommandCopyLen(&commands[i]);
size_t distcode = commands[i].dist_prefix_ & 0x3FF;
size_t cmdcode = commands[i].cmd_prefix_;
size_t j;
histogram_cmd[cmdcode]++;
if (cmdcode >= 128) histogram_dist[distcode]++;
for (j = 0; j < inslength; j++) {
histogram_literal[ringbuffer[(pos + j) & ringbuffer_mask]]++;
}
pos += inslength + copylength;
}
SetCost(histogram_literal, BROTLI_NUM_LITERAL_SYMBOLS, BROTLI_TRUE,
cost_literal);
SetCost(histogram_cmd, BROTLI_NUM_COMMAND_SYMBOLS, BROTLI_FALSE,
cost_cmd);
SetCost(histogram_dist, self->distance_histogram_size, BROTLI_FALSE,
self->cost_dist_);
for (i = 0; i < BROTLI_NUM_COMMAND_SYMBOLS; ++i) {
min_cost_cmd = BROTLI_MIN(float, min_cost_cmd, cost_cmd[i]);
}
self->min_cost_cmd_ = min_cost_cmd;
{
float* literal_costs = self->literal_costs_;
float literal_carry = 0.0;
size_t num_bytes = self->num_bytes_;
literal_costs[0] = 0.0;
for (i = 0; i < num_bytes; ++i) {
literal_carry +=
cost_literal[ringbuffer[(position + i) & ringbuffer_mask]];
literal_costs[i + 1] = literal_costs[i] + literal_carry;
literal_carry -= literal_costs[i + 1] - literal_costs[i];
}
}
}
static void ZopfliCostModelSetFromLiteralCosts(ZopfliCostModel* self,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
float* literal_costs = self->literal_costs_;
float literal_carry = 0.0;
float* cost_dist = self->cost_dist_;
float* cost_cmd = self->cost_cmd_;
size_t num_bytes = self->num_bytes_;
size_t i;
BrotliEstimateBitCostsForLiterals(position, num_bytes, ringbuffer_mask,
ringbuffer, &literal_costs[1]);
literal_costs[0] = 0.0;
for (i = 0; i < num_bytes; ++i) {
literal_carry += literal_costs[i + 1];
literal_costs[i + 1] = literal_costs[i] + literal_carry;
literal_carry -= literal_costs[i + 1] - literal_costs[i];
}
for (i = 0; i < BROTLI_NUM_COMMAND_SYMBOLS; ++i) {
cost_cmd[i] = (float)FastLog2(11 + (uint32_t)i);
}
for (i = 0; i < self->distance_histogram_size; ++i) {
cost_dist[i] = (float)FastLog2(20 + (uint32_t)i);
}
self->min_cost_cmd_ = (float)FastLog2(11);
}
static BROTLI_INLINE float ZopfliCostModelGetCommandCost(
const ZopfliCostModel* self, uint16_t cmdcode) {
return self->cost_cmd_[cmdcode];
}
static BROTLI_INLINE float ZopfliCostModelGetDistanceCost(
const ZopfliCostModel* self, size_t distcode) {
return self->cost_dist_[distcode];
}
static BROTLI_INLINE float ZopfliCostModelGetLiteralCosts(
const ZopfliCostModel* self, size_t from, size_t to) {
return self->literal_costs_[to] - self->literal_costs_[from];
}
static BROTLI_INLINE float ZopfliCostModelGetMinCostCmd(
const ZopfliCostModel* self) {
return self->min_cost_cmd_;
}
/* REQUIRES: len >= 2, start_pos <= pos */
/* REQUIRES: cost < kInfinity, nodes[start_pos].cost < kInfinity */
/* Maintains the "ZopfliNode array invariant". */
static BROTLI_INLINE void UpdateZopfliNode(ZopfliNode* nodes, size_t pos,
size_t start_pos, size_t len, size_t len_code, size_t dist,
size_t short_code, float cost) {
ZopfliNode* next = &nodes[pos + len];
next->length = (uint32_t)(len | ((len + 9u - len_code) << 25));
next->distance = (uint32_t)dist;
next->dcode_insert_length = (uint32_t)(
(short_code << 27) | (pos - start_pos));
next->u.cost = cost;
}
typedef struct PosData {
size_t pos;
int distance_cache[4];
float costdiff;
float cost;
} PosData;
/* Maintains the smallest 8 cost difference together with their positions */
typedef struct StartPosQueue {
PosData q_[8];
size_t idx_;
} StartPosQueue;
static BROTLI_INLINE void InitStartPosQueue(StartPosQueue* self) {
self->idx_ = 0;
}
static size_t StartPosQueueSize(const StartPosQueue* self) {
return BROTLI_MIN(size_t, self->idx_, 8);
}
static void StartPosQueuePush(StartPosQueue* self, const PosData* posdata) {
size_t offset = ~(self->idx_++) & 7;
size_t len = StartPosQueueSize(self);
size_t i;
PosData* q = self->q_;
q[offset] = *posdata;
/* Restore the sorted order. In the list of |len| items at most |len - 1|
adjacent element comparisons / swaps are required. */
for (i = 1; i < len; ++i) {
if (q[offset & 7].costdiff > q[(offset + 1) & 7].costdiff) {
BROTLI_SWAP(PosData, q, offset & 7, (offset + 1) & 7);
}
++offset;
}
}
static const PosData* StartPosQueueAt(const StartPosQueue* self, size_t k) {
return &self->q_[(k - self->idx_) & 7];
}
/* Returns the minimum possible copy length that can improve the cost of any */
/* future position. */
static size_t ComputeMinimumCopyLength(const float start_cost,
const ZopfliNode* nodes,
const size_t num_bytes,
const size_t pos) {
/* Compute the minimum possible cost of reaching any future position. */
float min_cost = start_cost;
size_t len = 2;
size_t next_len_bucket = 4;
size_t next_len_offset = 10;
while (pos + len <= num_bytes && nodes[pos + len].u.cost <= min_cost) {
/* We already reached (pos + len) with no more cost than the minimum
possible cost of reaching anything from this pos, so there is no point in
looking for lengths <= len. */
++len;
if (len == next_len_offset) {
/* We reached the next copy length code bucket, so we add one more
extra bit to the minimum cost. */
min_cost += 1.0f;
next_len_offset += next_len_bucket;
next_len_bucket *= 2;
}
}
return len;
}
/* REQUIRES: nodes[pos].cost < kInfinity
REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */
static uint32_t ComputeDistanceShortcut(const size_t block_start,
const size_t pos,
const size_t max_backward,
const size_t gap,
const ZopfliNode* nodes) {
const size_t clen = ZopfliNodeCopyLength(&nodes[pos]);
const size_t ilen = nodes[pos].dcode_insert_length & 0x7FFFFFF;
const size_t dist = ZopfliNodeCopyDistance(&nodes[pos]);
/* Since |block_start + pos| is the end position of the command, the copy part
starts from |block_start + pos - clen|. Distances that are greater than
this or greater than |max_backward| are static dictionary references, and
do not update the last distances. Also distance code 0 (last distance)
does not update the last distances. */
if (pos == 0) {
return 0;
} else if (dist + clen <= block_start + pos + gap &&
dist <= max_backward + gap &&
ZopfliNodeDistanceCode(&nodes[pos]) > 0) {
return (uint32_t)pos;
} else {
return nodes[pos - clen - ilen].u.shortcut;
}
}
/* Fills in dist_cache[0..3] with the last four distances (as defined by
Section 4. of the Spec) that would be used at (block_start + pos) if we
used the shortest path of commands from block_start, computed from
nodes[0..pos]. The last four distances at block_start are in
starting_dist_cache[0..3].
REQUIRES: nodes[pos].cost < kInfinity
REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */
static void ComputeDistanceCache(const size_t pos,
const int* starting_dist_cache,
const ZopfliNode* nodes,
int* dist_cache) {
int idx = 0;
size_t p = nodes[pos].u.shortcut;
while (idx < 4 && p > 0) {
const size_t ilen = nodes[p].dcode_insert_length & 0x7FFFFFF;
const size_t clen = ZopfliNodeCopyLength(&nodes[p]);
const size_t dist = ZopfliNodeCopyDistance(&nodes[p]);
dist_cache[idx++] = (int)dist;
/* Because of prerequisite, p >= clen + ilen >= 2. */
p = nodes[p - clen - ilen].u.shortcut;
}
for (; idx < 4; ++idx) {
dist_cache[idx] = *starting_dist_cache++;
}
}
/* Maintains "ZopfliNode array invariant" and pushes node to the queue, if it
is eligible. */
static void EvaluateNode(
const size_t block_start, const size_t pos, const size_t max_backward_limit,
const size_t gap, const int* starting_dist_cache,
const ZopfliCostModel* model, StartPosQueue* queue, ZopfliNode* nodes) {
/* Save cost, because ComputeDistanceCache invalidates it. */
float node_cost = nodes[pos].u.cost;
nodes[pos].u.shortcut = ComputeDistanceShortcut(
block_start, pos, max_backward_limit, gap, nodes);
if (node_cost <= ZopfliCostModelGetLiteralCosts(model, 0, pos)) {
PosData posdata;
posdata.pos = pos;
posdata.cost = node_cost;
posdata.costdiff = node_cost -
ZopfliCostModelGetLiteralCosts(model, 0, pos);
ComputeDistanceCache(
pos, starting_dist_cache, nodes, posdata.distance_cache);
StartPosQueuePush(queue, &posdata);
}
}
/* Returns longest copy length. */
static size_t UpdateNodes(
const size_t num_bytes, const size_t block_start, const size_t pos,
const uint8_t* ringbuffer, const size_t ringbuffer_mask,
const BrotliEncoderParams* params, const size_t max_backward_limit,
const int* starting_dist_cache, const size_t num_matches,
const BackwardMatch* matches, const ZopfliCostModel* model,
StartPosQueue* queue, ZopfliNode* nodes) {
const size_t cur_ix = block_start + pos;
const size_t cur_ix_masked = cur_ix & ringbuffer_mask;
const size_t max_distance = BROTLI_MIN(size_t, cur_ix, max_backward_limit);
const size_t max_len = num_bytes - pos;
const size_t max_zopfli_len = MaxZopfliLen(params);
const size_t max_iters = MaxZopfliCandidates(params);
size_t min_len;
size_t result = 0;
size_t k;
size_t gap = 0;
EvaluateNode(block_start, pos, max_backward_limit, gap, starting_dist_cache,
model, queue, nodes);
{
const PosData* posdata = StartPosQueueAt(queue, 0);
float min_cost = (posdata->cost + ZopfliCostModelGetMinCostCmd(model) +
ZopfliCostModelGetLiteralCosts(model, posdata->pos, pos));
min_len = ComputeMinimumCopyLength(min_cost, nodes, num_bytes, pos);
}
/* Go over the command starting positions in order of increasing cost
difference. */
for (k = 0; k < max_iters && k < StartPosQueueSize(queue); ++k) {
const PosData* posdata = StartPosQueueAt(queue, k);
const size_t start = posdata->pos;
const uint16_t inscode = GetInsertLengthCode(pos - start);
const float start_costdiff = posdata->costdiff;
const float base_cost = start_costdiff + (float)GetInsertExtra(inscode) +
ZopfliCostModelGetLiteralCosts(model, 0, pos);
/* Look for last distance matches using the distance cache from this
starting position. */
size_t best_len = min_len - 1;
size_t j = 0;
for (; j < BROTLI_NUM_DISTANCE_SHORT_CODES && best_len < max_len; ++j) {
const size_t idx = kDistanceCacheIndex[j];
const size_t backward =
(size_t)(posdata->distance_cache[idx] + kDistanceCacheOffset[j]);
size_t prev_ix = cur_ix - backward;
size_t len = 0;
uint8_t continuation = ringbuffer[cur_ix_masked + best_len];
if (cur_ix_masked + best_len > ringbuffer_mask) {
break;
}
if (BROTLI_PREDICT_FALSE(backward > max_distance + gap)) {
continue;
}
if (backward <= max_distance) {
if (prev_ix >= cur_ix) {
continue;
}
prev_ix &= ringbuffer_mask;
if (prev_ix + best_len > ringbuffer_mask ||
continuation != ringbuffer[prev_ix + best_len]) {
continue;
}
len = FindMatchLengthWithLimit(&ringbuffer[prev_ix],
&ringbuffer[cur_ix_masked],
max_len);
} else {
continue;
}
{
const float dist_cost = base_cost +
ZopfliCostModelGetDistanceCost(model, j);
size_t l;
for (l = best_len + 1; l <= len; ++l) {
const uint16_t copycode = GetCopyLengthCode(l);
const uint16_t cmdcode =
CombineLengthCodes(inscode, copycode, j == 0);
const float cost = (cmdcode < 128 ? base_cost : dist_cost) +
(float)GetCopyExtra(copycode) +
ZopfliCostModelGetCommandCost(model, cmdcode);
if (cost < nodes[pos + l].u.cost) {
UpdateZopfliNode(nodes, pos, start, l, l, backward, j + 1, cost);
result = BROTLI_MAX(size_t, result, l);
}
best_len = l;
}
}
}
/* At higher iterations look only for new last distance matches, since
looking only for new command start positions with the same distances
does not help much. */
if (k >= 2) continue;
{
/* Loop through all possible copy lengths at this position. */
size_t len = min_len;
for (j = 0; j < num_matches; ++j) {
BackwardMatch match = matches[j];
size_t dist = match.distance;
BROTLI_BOOL is_dictionary_match =
TO_BROTLI_BOOL(dist > max_distance + gap);
/* We already tried all possible last distance matches, so we can use
normal distance code here. */
size_t dist_code = dist + BROTLI_NUM_DISTANCE_SHORT_CODES - 1;
uint16_t dist_symbol;
uint32_t distextra;
uint32_t distnumextra;
float dist_cost;
size_t max_match_len;
PrefixEncodeCopyDistance(
dist_code, params->dist.num_direct_distance_codes,
params->dist.distance_postfix_bits, &dist_symbol, &distextra);
distnumextra = dist_symbol >> 10;
dist_cost = base_cost + (float)distnumextra +
ZopfliCostModelGetDistanceCost(model, dist_symbol & 0x3FF);
/* Try all copy lengths up until the maximum copy length corresponding
to this distance. If the distance refers to the static dictionary, or
the maximum length is long enough, try only one maximum length. */
max_match_len = BackwardMatchLength(&match);
if (len < max_match_len &&
(is_dictionary_match || max_match_len > max_zopfli_len)) {
len = max_match_len;
}
for (; len <= max_match_len; ++len) {
const size_t len_code =
is_dictionary_match ? BackwardMatchLengthCode(&match) : len;
const uint16_t copycode = GetCopyLengthCode(len_code);
const uint16_t cmdcode = CombineLengthCodes(inscode, copycode, 0);
const float cost = dist_cost + (float)GetCopyExtra(copycode) +
ZopfliCostModelGetCommandCost(model, cmdcode);
if (cost < nodes[pos + len].u.cost) {
UpdateZopfliNode(nodes, pos, start, len, len_code, dist, 0, cost);
result = BROTLI_MAX(size_t, result, len);
}
}
}
}
}
return result;
}
static size_t ComputeShortestPathFromNodes(size_t num_bytes,
ZopfliNode* nodes) {
size_t index = num_bytes;
size_t num_commands = 0;
while ((nodes[index].dcode_insert_length & 0x7FFFFFF) == 0 &&
nodes[index].length == 1) --index;
nodes[index].u.next = BROTLI_UINT32_MAX;
while (index != 0) {
size_t len = ZopfliNodeCommandLength(&nodes[index]);
index -= len;
nodes[index].u.next = (uint32_t)len;
num_commands++;
}
return num_commands;
}
/* REQUIRES: nodes != NULL and len(nodes) >= num_bytes + 1 */
void BrotliZopfliCreateCommands(const size_t num_bytes,
const size_t block_start,
const size_t max_backward_limit,
const ZopfliNode* nodes,
int* dist_cache,
size_t* last_insert_len,
const BrotliEncoderParams* params,
Command* commands,
size_t* num_literals) {
size_t pos = 0;
uint32_t offset = nodes[0].u.next;
size_t i;
size_t gap = 0;
for (i = 0; offset != BROTLI_UINT32_MAX; i++) {
const ZopfliNode* next = &nodes[pos + offset];
size_t copy_length = ZopfliNodeCopyLength(next);
size_t insert_length = next->dcode_insert_length & 0x7FFFFFF;
pos += insert_length;
offset = next->u.next;
if (i == 0) {
insert_length += *last_insert_len;
*last_insert_len = 0;
}
{
size_t distance = ZopfliNodeCopyDistance(next);
size_t len_code = ZopfliNodeLengthCode(next);
size_t max_distance =
BROTLI_MIN(size_t, block_start + pos, max_backward_limit);
BROTLI_BOOL is_dictionary = TO_BROTLI_BOOL(distance > max_distance + gap);
size_t dist_code = ZopfliNodeDistanceCode(next);
InitCommand(&commands[i], &params->dist, insert_length,
copy_length, (int)len_code - (int)copy_length, dist_code);
if (!is_dictionary && dist_code > 0) {
dist_cache[3] = dist_cache[2];
dist_cache[2] = dist_cache[1];
dist_cache[1] = dist_cache[0];
dist_cache[0] = (int)distance;
}
}
*num_literals += insert_length;
pos += copy_length;
}
*last_insert_len += num_bytes - pos;
}
static size_t ZopfliIterate(size_t num_bytes,
size_t position,
const uint8_t* ringbuffer,
size_t ringbuffer_mask,
const BrotliEncoderParams* params,
const size_t max_backward_limit,
const size_t gap,
const int* dist_cache,
const ZopfliCostModel* model,
const uint32_t* num_matches,
const BackwardMatch* matches,
ZopfliNode* nodes) {
const size_t max_zopfli_len = MaxZopfliLen(params);
StartPosQueue queue;
size_t cur_match_pos = 0;
size_t i;
nodes[0].length = 0;
nodes[0].u.cost = 0;
InitStartPosQueue(&queue);
for (i = 0; i + 3 < num_bytes; i++) {
size_t skip = UpdateNodes(num_bytes, position, i, ringbuffer,
ringbuffer_mask, params, max_backward_limit, dist_cache,
num_matches[i], &matches[cur_match_pos], model, &queue, nodes);
if (skip < BROTLI_LONG_COPY_QUICK_STEP) skip = 0;
cur_match_pos += num_matches[i];
if (num_matches[i] == 1 &&
BackwardMatchLength(&matches[cur_match_pos - 1]) > max_zopfli_len) {
skip = BROTLI_MAX(size_t,
BackwardMatchLength(&matches[cur_match_pos - 1]), skip);
}
if (skip > 1) {
skip--;
while (skip) {
i++;
if (i + 3 >= num_bytes) break;
EvaluateNode(position, i, max_backward_limit, gap, dist_cache, model,
&queue, nodes);
cur_match_pos += num_matches[i];
skip--;
}
}
}
return ComputeShortestPathFromNodes(num_bytes, nodes);
}
/* REQUIRES: nodes != NULL and len(nodes) >= num_bytes + 1 */
size_t BrotliZopfliComputeShortestPath(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
const size_t max_backward_limit, const int* dist_cache, HasherHandle hasher,
ZopfliNode* nodes) {
const size_t max_zopfli_len = MaxZopfliLen(params);
ZopfliCostModel model;
StartPosQueue queue;
BackwardMatch matches[2 * (MAX_NUM_MATCHES_H10 + 64)];
const size_t store_end = num_bytes >= StoreLookaheadH10() ?
position + num_bytes - StoreLookaheadH10() + 1 : position;
size_t i;
size_t gap = 0;
size_t lz_matches_offset = 0;
nodes[0].length = 0;
nodes[0].u.cost = 0;
InitZopfliCostModel(m, &model, &params->dist, num_bytes);
if (BROTLI_IS_OOM(m)) return 0;
ZopfliCostModelSetFromLiteralCosts(
&model, position, ringbuffer, ringbuffer_mask);
InitStartPosQueue(&queue);
for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; i++) {
const size_t pos = position + i;
const size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
size_t skip;
size_t num_matches = FindAllMatchesH10(hasher, &params->dictionary,
ringbuffer, ringbuffer_mask, pos, num_bytes - i, max_distance, gap,
params, &matches[lz_matches_offset]);
if (num_matches > 0 &&
BackwardMatchLength(&matches[num_matches - 1]) > max_zopfli_len) {
matches[0] = matches[num_matches - 1];
num_matches = 1;
}
skip = UpdateNodes(num_bytes, position, i, ringbuffer, ringbuffer_mask,
params, max_backward_limit, dist_cache, num_matches, matches, &model,
&queue, nodes);
if (skip < BROTLI_LONG_COPY_QUICK_STEP) skip = 0;
if (num_matches == 1 && BackwardMatchLength(&matches[0]) > max_zopfli_len) {
skip = BROTLI_MAX(size_t, BackwardMatchLength(&matches[0]), skip);
}
if (skip > 1) {
/* Add the tail of the copy to the hasher. */
StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1, BROTLI_MIN(
size_t, pos + skip, store_end));
skip--;
while (skip) {
i++;
if (i + HashTypeLengthH10() - 1 >= num_bytes) break;
EvaluateNode(position, i, max_backward_limit, gap, dist_cache, &model,
&queue, nodes);
skip--;
}
}
}
CleanupZopfliCostModel(m, &model);
return ComputeShortestPathFromNodes(num_bytes, nodes);
}
void BrotliCreateZopfliBackwardReferences(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals) {
const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
ZopfliNode* nodes;
nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
if (BROTLI_IS_OOM(m)) return;
BrotliInitZopfliNodes(nodes, num_bytes + 1);
*num_commands += BrotliZopfliComputeShortestPath(m,
num_bytes, position, ringbuffer, ringbuffer_mask,
params, max_backward_limit, dist_cache, hasher, nodes);
if (BROTLI_IS_OOM(m)) return;
BrotliZopfliCreateCommands(num_bytes, position, max_backward_limit, nodes,
dist_cache, last_insert_len, params, commands, num_literals);
BROTLI_FREE(m, nodes);
}
void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals) {
const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
uint32_t* num_matches = BROTLI_ALLOC(m, uint32_t, num_bytes);
size_t matches_size = 4 * num_bytes;
const size_t store_end = num_bytes >= StoreLookaheadH10() ?
position + num_bytes - StoreLookaheadH10() + 1 : position;
size_t cur_match_pos = 0;
size_t i;
size_t orig_num_literals;
size_t orig_last_insert_len;
int orig_dist_cache[4];
size_t orig_num_commands;
ZopfliCostModel model;
ZopfliNode* nodes;
BackwardMatch* matches = BROTLI_ALLOC(m, BackwardMatch, matches_size);
size_t gap = 0;
size_t shadow_matches = 0;
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; ++i) {
const size_t pos = position + i;
size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
size_t max_length = num_bytes - i;
size_t num_found_matches;
size_t cur_match_end;
size_t j;
/* Ensure that we have enough free slots. */
BROTLI_ENSURE_CAPACITY(m, BackwardMatch, matches, matches_size,
cur_match_pos + MAX_NUM_MATCHES_H10 + shadow_matches);
if (BROTLI_IS_OOM(m)) return;
num_found_matches = FindAllMatchesH10(hasher,
&params->dictionary, ringbuffer, ringbuffer_mask, pos, max_length,
max_distance, gap, params, &matches[cur_match_pos + shadow_matches]);
cur_match_end = cur_match_pos + num_found_matches;
for (j = cur_match_pos; j + 1 < cur_match_end; ++j) {
BROTLI_DCHECK(BackwardMatchLength(&matches[j]) <=
BackwardMatchLength(&matches[j + 1]));
}
num_matches[i] = (uint32_t)num_found_matches;
if (num_found_matches > 0) {
const size_t match_len = BackwardMatchLength(&matches[cur_match_end - 1]);
if (match_len > MAX_ZOPFLI_LEN_QUALITY_11) {
const size_t skip = match_len - 1;
matches[cur_match_pos++] = matches[cur_match_end - 1];
num_matches[i] = 1;
/* Add the tail of the copy to the hasher. */
StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1,
BROTLI_MIN(size_t, pos + match_len, store_end));
memset(&num_matches[i + 1], 0, skip * sizeof(num_matches[0]));
i += skip;
} else {
cur_match_pos = cur_match_end;
}
}
}
orig_num_literals = *num_literals;
orig_last_insert_len = *last_insert_len;
memcpy(orig_dist_cache, dist_cache, 4 * sizeof(dist_cache[0]));
orig_num_commands = *num_commands;
nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
if (BROTLI_IS_OOM(m)) return;
InitZopfliCostModel(m, &model, &params->dist, num_bytes);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < 2; i++) {
BrotliInitZopfliNodes(nodes, num_bytes + 1);
if (i == 0) {
ZopfliCostModelSetFromLiteralCosts(
&model, position, ringbuffer, ringbuffer_mask);
} else {
ZopfliCostModelSetFromCommands(&model, position, ringbuffer,
ringbuffer_mask, commands, *num_commands - orig_num_commands,
orig_last_insert_len);
}
*num_commands = orig_num_commands;
*num_literals = orig_num_literals;
*last_insert_len = orig_last_insert_len;
memcpy(dist_cache, orig_dist_cache, 4 * sizeof(dist_cache[0]));
*num_commands += ZopfliIterate(num_bytes, position, ringbuffer,
ringbuffer_mask, params, max_backward_limit, gap, dist_cache,
&model, num_matches, matches, nodes);
BrotliZopfliCreateCommands(num_bytes, position, max_backward_limit,
nodes, dist_cache, last_insert_len, params, commands, num_literals);
}
CleanupZopfliCostModel(m, &model);
BROTLI_FREE(m, nodes);
BROTLI_FREE(m, matches);
BROTLI_FREE(m, num_matches);
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Function to find backward reference copies. */
#ifndef BROTLI_ENC_BACKWARD_REFERENCES_HQ_H_
#define BROTLI_ENC_BACKWARD_REFERENCES_HQ_H_
#include "../common/constants.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./hash.h"
#include "./memory.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
BROTLI_INTERNAL void BrotliCreateZopfliBackwardReferences(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals);
BROTLI_INTERNAL void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
Command* commands, size_t* num_commands, size_t* num_literals);
typedef struct ZopfliNode {
/* Best length to get up to this byte (not including this byte itself)
highest 7 bit is used to reconstruct the length code. */
uint32_t length;
/* Distance associated with the length. */
uint32_t distance;
/* Number of literal inserts before this copy; highest 5 bits contain
distance short code + 1 (or zero if no short code). */
uint32_t dcode_insert_length;
/* This union holds information used by dynamic-programming. During forward
pass |cost| it used to store the goal function. When node is processed its
|cost| is invalidated in favor of |shortcut|. On path back-tracing pass
|next| is assigned the offset to next node on the path. */
union {
/* Smallest cost to get to this byte from the beginning, as found so far. */
float cost;
/* Offset to the next node on the path. Equals to command_length() of the
next node on the path. For last node equals to BROTLI_UINT32_MAX */
uint32_t next;
/* Node position that provides next distance for distance cache. */
uint32_t shortcut;
} u;
} ZopfliNode;
BROTLI_INTERNAL void BrotliInitZopfliNodes(ZopfliNode* array, size_t length);
/* Computes the shortest path of commands from position to at most
position + num_bytes.
On return, path->size() is the number of commands found and path[i] is the
length of the i-th command (copy length plus insert length).
Note that the sum of the lengths of all commands can be less than num_bytes.
On return, the nodes[0..num_bytes] array will have the following
"ZopfliNode array invariant":
For each i in [1..num_bytes], if nodes[i].cost < kInfinity, then
(1) nodes[i].copy_length() >= 2
(2) nodes[i].command_length() <= i and
(3) nodes[i - nodes[i].command_length()].cost < kInfinity */
BROTLI_INTERNAL size_t BrotliZopfliComputeShortestPath(MemoryManager* m,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask, const BrotliEncoderParams* params,
const size_t max_backward_limit, const int* dist_cache, HasherHandle hasher,
ZopfliNode* nodes);
BROTLI_INTERNAL void BrotliZopfliCreateCommands(
const size_t num_bytes, const size_t block_start,
const size_t max_backward_limit, const ZopfliNode* nodes,
int* dist_cache, size_t* last_insert_len, const BrotliEncoderParams* params,
Command* commands, size_t* num_literals);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_BACKWARD_REFERENCES_HQ_H_ */

70
BaseTools/Source/C/BrotliCompress/enc/backward_references_inc.h
View File

@ -5,18 +5,16 @@
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN */
/* template parameters: EXPORT_FN, FN */
#define Hasher HASHER()
static BROTLI_NOINLINE void FN(CreateBackwardReferences)(
MemoryManager* m, size_t num_bytes, size_t position, BROTLI_BOOL is_last,
static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
size_t num_bytes, size_t position,
const uint8_t* ringbuffer, size_t ringbuffer_mask,
const BrotliEncoderParams* params, Hasher* hasher, int* dist_cache,
const BrotliEncoderParams* params, HasherHandle hasher, int* dist_cache,
size_t* last_insert_len, Command* commands, size_t* num_commands,
size_t* num_literals) {
/* Set maximum distance, see section 9.1. of the spec. */
const size_t max_backward_limit = MaxBackwardLimit(params->lgwin);
const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
const Command* const orig_commands = commands;
size_t insert_length = *last_insert_len;
@ -28,42 +26,42 @@ static BROTLI_NOINLINE void FN(CreateBackwardReferences)(
const size_t random_heuristics_window_size =
LiteralSpreeLengthForSparseSearch(params);
size_t apply_random_heuristics = position + random_heuristics_window_size;
const size_t gap = 0;
/* Minimum score to accept a backward reference. */
const score_t kMinScore = BROTLI_SCORE_BASE + 400;
const score_t kMinScore = BROTLI_SCORE_BASE + 100;
FN(Init)(m, hasher, ringbuffer, params, position, num_bytes, is_last);
if (BROTLI_IS_OOM(m)) return;
FN(StitchToPreviousBlock)(hasher, num_bytes, position,
ringbuffer, ringbuffer_mask);
FN(PrepareDistanceCache)(hasher, dist_cache);
while (position + FN(HashTypeLength)() < pos_end) {
size_t max_length = pos_end - position;
size_t max_distance = BROTLI_MIN(size_t, position, max_backward_limit);
HasherSearchResult sr;
sr.len = 0;
sr.len_x_code = 0;
sr.len_code_delta = 0;
sr.distance = 0;
sr.score = kMinScore;
if (FN(FindLongestMatch)(hasher, ringbuffer, ringbuffer_mask, dist_cache,
position, max_length, max_distance, &sr)) {
FN(FindLongestMatch)(hasher, &params->dictionary,
ringbuffer, ringbuffer_mask, dist_cache, position,
max_length, max_distance, gap,
params->dist.max_distance, &sr);
if (sr.score > kMinScore) {
/* Found a match. Let's look for something even better ahead. */
int delayed_backward_references_in_row = 0;
--max_length;
for (;; --max_length) {
const score_t cost_diff_lazy = 700;
BROTLI_BOOL is_match_found;
const score_t cost_diff_lazy = 175;
HasherSearchResult sr2;
sr2.len = params->quality < MIN_QUALITY_FOR_EXTENSIVE_REFERENCE_SEARCH ?
BROTLI_MIN(size_t, sr.len - 1, max_length) : 0;
sr2.len_x_code = 0;
sr2.len_code_delta = 0;
sr2.distance = 0;
sr2.score = kMinScore;
max_distance = BROTLI_MIN(size_t, position + 1, max_backward_limit);
is_match_found = FN(FindLongestMatch)(hasher, ringbuffer,
ringbuffer_mask, dist_cache, position + 1, max_length, max_distance,
&sr2);
if (is_match_found && sr2.score >= sr.score + cost_diff_lazy) {
FN(FindLongestMatch)(hasher, &params->dictionary,
ringbuffer, ringbuffer_mask, dist_cache, position + 1, max_length,
max_distance, gap, params->dist.max_distance, &sr2);
if (sr2.score >= sr.score + cost_diff_lazy) {
/* Ok, let's just write one byte for now and start a match from the
next byte. */
++position;
@ -80,26 +78,36 @@ static BROTLI_NOINLINE void FN(CreateBackwardReferences)(
position + 2 * sr.len + random_heuristics_window_size;
max_distance = BROTLI_MIN(size_t, position, max_backward_limit);
{
/* The first 16 codes are special shortcodes,
/* The first 16 codes are special short-codes,
and the minimum offset is 1. */
size_t distance_code =
ComputeDistanceCode(sr.distance, max_distance, dist_cache);
if (sr.distance <= max_distance && distance_code > 0) {
ComputeDistanceCode(sr.distance, max_distance + gap, dist_cache);
if ((sr.distance <= (max_distance + gap)) && distance_code > 0) {
dist_cache[3] = dist_cache[2];
dist_cache[2] = dist_cache[1];
dist_cache[1] = dist_cache[0];
dist_cache[0] = (int)sr.distance;
FN(PrepareDistanceCache)(hasher, dist_cache);
}
InitCommand(commands++, insert_length, sr.len, sr.len ^ sr.len_x_code,
distance_code);
InitCommand(commands++, &params->dist, insert_length,
sr.len, sr.len_code_delta, distance_code);
}
*num_literals += insert_length;
insert_length = 0;
/* Put the hash keys into the table, if there are enough bytes left.
Depending on the hasher implementation, it can push all positions
in the given range or only a subset of them. */
FN(StoreRange)(hasher, ringbuffer, ringbuffer_mask, position + 2,
BROTLI_MIN(size_t, position + sr.len, store_end));
in the given range or only a subset of them.
Avoid hash poisoning with RLE data. */
{
size_t range_start = position + 2;
size_t range_end = BROTLI_MIN(size_t, position + sr.len, store_end);
if (sr.distance < (sr.len >> 2)) {
range_start = BROTLI_MIN(size_t, range_end, BROTLI_MAX(size_t,
range_start, position + sr.len - (sr.distance << 2)));
}
FN(StoreRange)(hasher, ringbuffer, ringbuffer_mask, range_start,
range_end);
}
position += sr.len;
} else {
++insert_length;
@ -143,5 +151,3 @@ static BROTLI_NOINLINE void FN(CreateBackwardReferences)(
*last_insert_len = insert_length;
*num_commands += (size_t)(commands - orig_commands);
}
#undef Hasher

4
BaseTools/Source/C/BrotliCompress/enc/bit_cost.c
View File

@ -9,10 +9,10 @@
#include "./bit_cost.h"
#include "../common/constants.h"
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./fast_log.h"
#include "./histogram.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {

12
BaseTools/Source/C/BrotliCompress/enc/bit_cost.h
View File

@ -9,20 +9,20 @@
#ifndef BROTLI_ENC_BIT_COST_H_
#define BROTLI_ENC_BIT_COST_H_
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./fast_log.h"
#include "./histogram.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static BROTLI_INLINE double ShannonEntropy(const uint32_t *population,
size_t size, size_t *total) {
static BROTLI_INLINE double ShannonEntropy(
const uint32_t* population, size_t size, size_t* total) {
size_t sum = 0;
double retval = 0;
const uint32_t *population_end = population + size;
const uint32_t* population_end = population + size;
size_t p;
if (size & 1) {
goto odd_number_of_elements_left;
@ -42,7 +42,7 @@ static BROTLI_INLINE double ShannonEntropy(const uint32_t *population,
}
static BROTLI_INLINE double BitsEntropy(
const uint32_t *population, size_t size) {
const uint32_t* population, size_t size) {
size_t sum;
double retval = ShannonEntropy(population, size, &sum);
if (retval < sum) {

13
BaseTools/Source/C/BrotliCompress/enc/block_encoder_inc.h
View File

@ -13,9 +13,9 @@
stream. */
static void FN(BuildAndStoreEntropyCodes)(MemoryManager* m, BlockEncoder* self,
const HistogramType* histograms, const size_t histograms_size,
HuffmanTree* tree, size_t* storage_ix, uint8_t* storage) {
const size_t alphabet_size = self->alphabet_size_;
const size_t table_size = histograms_size * alphabet_size;
const size_t alphabet_size, HuffmanTree* tree,
size_t* storage_ix, uint8_t* storage) {
const size_t table_size = histograms_size * self->histogram_length_;
self->depths_ = BROTLI_ALLOC(m, uint8_t, table_size);
self->bits_ = BROTLI_ALLOC(m, uint16_t, table_size);
if (BROTLI_IS_OOM(m)) return;
@ -23,9 +23,10 @@ static void FN(BuildAndStoreEntropyCodes)(MemoryManager* m, BlockEncoder* self,
{
size_t i;
for (i = 0; i < histograms_size; ++i) {
size_t ix = i * alphabet_size;
BuildAndStoreHuffmanTree(&histograms[i].data_[0], alphabet_size, tree,
&self->depths_[ix], &self->bits_[ix], storage_ix, storage);
size_t ix = i * self->histogram_length_;
BuildAndStoreHuffmanTree(&histograms[i].data_[0], self->histogram_length_,
alphabet_size, tree, &self->depths_[ix], &self->bits_[ix],
storage_ix, storage);
}
}
}

11
BaseTools/Source/C/BrotliCompress/enc/block_splitter.c
View File

@ -8,16 +8,15 @@
#include "./block_splitter.h"
#include <assert.h>
#include <string.h> /* memcpy, memset */
#include "../common/platform.h"
#include "./bit_cost.h"
#include "./cluster.h"
#include "./command.h"
#include "./fast_log.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -74,11 +73,9 @@ static void CopyLiteralsToByteArray(const Command* cmds,
}
}
static BROTLI_INLINE unsigned int MyRand(unsigned int* seed) {
static BROTLI_INLINE uint32_t MyRand(uint32_t* seed) {
/* Initial seed should be 7. In this case, loop length is (1 << 29). */
*seed *= 16807U;
if (*seed == 0) {
*seed = 1;
}
return *seed;
}
@ -177,7 +174,7 @@ void BrotliSplitBlock(MemoryManager* m,
for (i = 0; i < num_commands; ++i) {
const Command* cmd = &cmds[i];
if (CommandCopyLen(cmd) && cmd->cmd_prefix_ >= 128) {
distance_prefixes[j++] = cmd->dist_prefix_;
distance_prefixes[j++] = cmd->dist_prefix_ & 0x3FF;
}
}
/* Create the block split on the array of distance prefixes. */

4
BaseTools/Source/C/BrotliCompress/enc/block_splitter.h
View File

@ -9,10 +9,10 @@
#ifndef BROTLI_ENC_BLOCK_SPLITTER_H_
#define BROTLI_ENC_BLOCK_SPLITTER_H_
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)

35
BaseTools/Source/C/BrotliCompress/enc/block_splitter_inc.h
View File

@ -13,7 +13,7 @@ static void FN(InitialEntropyCodes)(const DataType* data, size_t length,
size_t stride,
size_t num_histograms,
HistogramType* histograms) {
unsigned int seed = 7;
uint32_t seed = 7;
size_t block_length = length / num_histograms;
size_t i;
FN(ClearHistograms)(histograms, num_histograms);
@ -29,14 +29,13 @@ static void FN(InitialEntropyCodes)(const DataType* data, size_t length,
}
}
static void FN(RandomSample)(unsigned int* seed,
static void FN(RandomSample)(uint32_t* seed,
const DataType* data,
size_t length,
size_t stride,
HistogramType* sample) {
size_t pos = 0;
if (stride >= length) {
pos = 0;
stride = length;
} else {
pos = MyRand(seed) % (length - stride + 1);
@ -50,7 +49,7 @@ static void FN(RefineEntropyCodes)(const DataType* data, size_t length,
HistogramType* histograms) {
size_t iters =
kIterMulForRefining * length / stride + kMinItersForRefining;
unsigned int seed = 7;
uint32_t seed = 7;
size_t iter;
iters = ((iters + num_histograms - 1) / num_histograms) * num_histograms;
for (iter = 0; iter < iters; ++iter) {
@ -61,7 +60,7 @@ static void FN(RefineEntropyCodes)(const DataType* data, size_t length,
}
}
/* Assigns a block id from the range [0, vec.size()) to each data element
/* Assigns a block id from the range [0, num_histograms) to each data element
in data[0..length) and fills in block_id[0..length) with the assigned values.
Returns the number of blocks, i.e. one plus the number of block switches. */
static size_t FN(FindBlocks)(const DataType* data, const size_t length,
@ -71,13 +70,13 @@ static size_t FN(FindBlocks)(const DataType* data, const size_t length,
double* insert_cost,
double* cost,
uint8_t* switch_signal,
uint8_t *block_id) {
uint8_t* block_id) {
const size_t data_size = FN(HistogramDataSize)();
const size_t bitmaplen = (num_histograms + 7) >> 3;
size_t num_blocks = 1;
size_t i;
size_t j;
assert(num_histograms <= 256);
BROTLI_DCHECK(num_histograms <= 256);
if (num_histograms <= 1) {
for (i = 0; i < length; ++i) {
block_id[i] = 0;
@ -127,7 +126,7 @@ static size_t FN(FindBlocks)(const DataType* data, const size_t length,
if (cost[k] >= block_switch_cost) {
const uint8_t mask = (uint8_t)(1u << (k & 7));
cost[k] = block_switch_cost;
assert((k >> 3) < bitmaplen);
BROTLI_DCHECK((k >> 3) < bitmaplen);
switch_signal[ix + (k >> 3)] |= mask;
}
}
@ -138,7 +137,7 @@ static size_t FN(FindBlocks)(const DataType* data, const size_t length,
uint8_t cur_id = block_id[byte_ix];
while (byte_ix > 0) {
const uint8_t mask = (uint8_t)(1u << (cur_id & 7));
assert(((size_t)cur_id >> 3) < bitmaplen);
BROTLI_DCHECK(((size_t)cur_id >> 3) < bitmaplen);
--byte_ix;
ix -= bitmaplen;
if (switch_signal[ix + (cur_id >> 3)] & mask) {
@ -162,16 +161,16 @@ static size_t FN(RemapBlockIds)(uint8_t* block_ids, const size_t length,
new_id[i] = kInvalidId;
}
for (i = 0; i < length; ++i) {
assert(block_ids[i] < num_histograms);
BROTLI_DCHECK(block_ids[i] < num_histograms);
if (new_id[block_ids[i]] == kInvalidId) {
new_id[block_ids[i]] = next_id++;
}
}
for (i = 0; i < length; ++i) {
block_ids[i] = (uint8_t)new_id[block_ids[i]];
assert(block_ids[i] < num_histograms);
BROTLI_DCHECK(block_ids[i] < num_histograms);
}
assert(next_id <= num_histograms);
BROTLI_DCHECK(next_id <= num_histograms);
return next_id;
}
@ -214,7 +213,6 @@ static void FN(ClusterBlocks)(MemoryManager* m,
size_t num_final_clusters;
static const uint32_t kInvalidIndex = BROTLI_UINT32_MAX;
uint32_t* new_index;
uint8_t max_type = 0;
size_t i;
uint32_t sizes[HISTOGRAMS_PER_BATCH] = { 0 };
uint32_t new_clusters[HISTOGRAMS_PER_BATCH] = { 0 };
@ -228,13 +226,13 @@ static void FN(ClusterBlocks)(MemoryManager* m,
{
size_t block_idx = 0;
for (i = 0; i < length; ++i) {
assert(block_idx < num_blocks);
BROTLI_DCHECK(block_idx < num_blocks);
++block_lengths[block_idx];
if (i + 1 == length || block_ids[i] != block_ids[i + 1]) {
++block_idx;
}
}
assert(block_idx == num_blocks);
BROTLI_DCHECK(block_idx == num_blocks);
}
for (i = 0; i < num_blocks; i += HISTOGRAMS_PER_BATCH) {
@ -270,8 +268,8 @@ static void FN(ClusterBlocks)(MemoryManager* m,
histogram_symbols[i + j] = (uint32_t)num_clusters + remap[symbols[j]];
}
num_clusters += num_new_clusters;
assert(num_clusters == cluster_size_size);
assert(num_clusters == all_histograms_size);
BROTLI_DCHECK(num_clusters == cluster_size_size);
BROTLI_DCHECK(num_clusters == all_histograms_size);
}
BROTLI_FREE(m, histograms);
@ -337,6 +335,7 @@ static void FN(ClusterBlocks)(MemoryManager* m,
{
uint32_t cur_length = 0;
size_t block_idx = 0;
uint8_t max_type = 0;
for (i = 0; i < num_blocks; ++i) {
cur_length += block_lengths[i];
if (i + 1 == num_blocks ||
@ -398,7 +397,7 @@ static void FN(SplitByteVector)(MemoryManager* m,
{
/* Find a good path through literals with the good entropy codes. */
uint8_t* block_ids = BROTLI_ALLOC(m, uint8_t, length);
size_t num_blocks;
size_t num_blocks = 0;
const size_t bitmaplen = (num_histograms + 7) >> 3;
double* insert_cost = BROTLI_ALLOC(m, double, data_size * num_histograms);
double* cost = BROTLI_ALLOC(m, double, num_histograms);

223
BaseTools/Source/C/BrotliCompress/enc/brotli_bit_stream.c
View File

@ -13,13 +13,14 @@
#include <string.h> /* memcpy, memset */
#include "../common/constants.h"
#include "../common/types.h"
#include "./context.h"
#include "../common/context.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./entropy_encode.h"
#include "./entropy_encode_static.h"
#include "./fast_log.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#include "./write_bits.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -27,6 +28,11 @@ extern "C" {
#endif
#define MAX_HUFFMAN_TREE_SIZE (2 * BROTLI_NUM_COMMAND_SYMBOLS + 1)
/* The maximum size of Huffman dictionary for distances assuming that
NPOSTFIX = 0 and NDIRECT = 0. */
#define MAX_SIMPLE_DISTANCE_ALPHABET_SIZE \
BROTLI_DISTANCE_ALPHABET_SIZE(0, 0, BROTLI_LARGE_MAX_DISTANCE_BITS)
/* MAX_SIMPLE_DISTANCE_ALPHABET_SIZE == 140 */
/* Represents the range of values belonging to a prefix code:
[offset, offset + 2^nbits) */
@ -76,16 +82,16 @@ static BROTLI_INLINE size_t NextBlockTypeCode(
return type_code;
}
/* nibblesbits represents the 2 bits to encode MNIBBLES (0-3)
/* |nibblesbits| represents the 2 bits to encode MNIBBLES (0-3)
REQUIRES: length > 0
REQUIRES: length <= (1 << 24) */
static void BrotliEncodeMlen(size_t length, uint64_t* bits,
size_t* numbits, uint64_t* nibblesbits) {
size_t lg = (length == 1) ? 1 : Log2FloorNonZero((uint32_t)(length - 1)) + 1;
size_t mnibbles = (lg < 16 ? 16 : (lg + 3)) / 4;
assert(length > 0);
assert(length <= (1 << 24));
assert(lg <= 24);
BROTLI_DCHECK(length > 0);
BROTLI_DCHECK(length <= (1 << 24));
BROTLI_DCHECK(lg <= 24);
*nibblesbits = mnibbles - 4;
*numbits = mnibbles * 4;
*bits = length - 1;
@ -252,7 +258,7 @@ static void StoreSimpleHuffmanTree(const uint8_t* depths,
size_t symbols[4],
size_t num_symbols,
size_t max_bits,
size_t *storage_ix, uint8_t *storage) {
size_t* storage_ix, uint8_t* storage) {
/* value of 1 indicates a simple Huffman code */
BrotliWriteBits(2, 1, storage_ix, storage);
BrotliWriteBits(2, num_symbols - 1, storage_ix, storage); /* NSYM - 1 */
@ -291,7 +297,7 @@ static void StoreSimpleHuffmanTree(const uint8_t* depths,
depths = symbol depths */
void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
HuffmanTree* tree,
size_t *storage_ix, uint8_t *storage) {
size_t* storage_ix, uint8_t* storage) {
/* Write the Huffman tree into the brotli-representation.
The command alphabet is the largest, so this allocation will fit all
alphabets. */
@ -305,7 +311,7 @@ void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
int num_codes = 0;
size_t code = 0;
assert(num <= BROTLI_NUM_COMMAND_SYMBOLS);
BROTLI_DCHECK(num <= BROTLI_NUM_COMMAND_SYMBOLS);
BrotliWriteHuffmanTree(depths, num, &huffman_tree_size, huffman_tree,
huffman_tree_extra_bits);
@ -343,7 +349,7 @@ void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
code_length_bitdepth[code] = 0;
}
/* Store the real huffman tree now. */
/* Store the real Huffman tree now. */
BrotliStoreHuffmanTreeToBitMask(huffman_tree_size,
huffman_tree,
huffman_tree_extra_bits,
@ -354,8 +360,9 @@ void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
/* Builds a Huffman tree from histogram[0:length] into depth[0:length] and
bits[0:length] and stores the encoded tree to the bit stream. */
static void BuildAndStoreHuffmanTree(const uint32_t *histogram,
const size_t length,
static void BuildAndStoreHuffmanTree(const uint32_t* histogram,
const size_t histogram_length,
const size_t alphabet_size,
HuffmanTree* tree,
uint8_t* depth,
uint16_t* bits,
@ -365,7 +372,7 @@ static void BuildAndStoreHuffmanTree(const uint32_t *histogram,
size_t s4[4] = { 0 };
size_t i;
size_t max_bits = 0;
for (i = 0; i < length; i++) {
for (i = 0; i < histogram_length; i++) {
if (histogram[i]) {
if (count < 4) {
s4[count] = i;
@ -377,7 +384,7 @@ static void BuildAndStoreHuffmanTree(const uint32_t *histogram,
}
{
size_t max_bits_counter = length - 1;
size_t max_bits_counter = alphabet_size - 1;
while (max_bits_counter) {
max_bits_counter >>= 1;
++max_bits;
@ -392,14 +399,14 @@ static void BuildAndStoreHuffmanTree(const uint32_t *histogram,
return;
}
memset(depth, 0, length * sizeof(depth[0]));
BrotliCreateHuffmanTree(histogram, length, 15, tree, depth);
BrotliConvertBitDepthsToSymbols(depth, length, bits);
memset(depth, 0, histogram_length * sizeof(depth[0]));
BrotliCreateHuffmanTree(histogram, histogram_length, 15, tree, depth);
BrotliConvertBitDepthsToSymbols(depth, histogram_length, bits);
if (count <= 4) {
StoreSimpleHuffmanTree(depth, s4, count, max_bits, storage_ix, storage);
} else {
BrotliStoreHuffmanTree(depth, length, tree, storage_ix, storage);
BrotliStoreHuffmanTree(depth, histogram_length, tree, storage_ix, storage);
}
}
@ -450,7 +457,7 @@ void BrotliBuildAndStoreHuffmanTreeFast(MemoryManager* m,
for (l = length; l != 0;) {
--l;
if (histogram[l]) {
if (PREDICT_TRUE(histogram[l] >= count_limit)) {
if (BROTLI_PREDICT_TRUE(histogram[l] >= count_limit)) {
InitHuffmanTree(node, histogram[l], -1, (int16_t)l);
} else {
InitHuffmanTree(node, count_limit, -1, (int16_t)l);
@ -548,7 +555,7 @@ void BrotliBuildAndStoreHuffmanTreeFast(MemoryManager* m,
/* Complex Huffman Tree */
StoreStaticCodeLengthCode(storage_ix, storage);
/* Actual rle coding. */
/* Actual RLE coding. */
for (i = 0; i < length;) {
const uint8_t value = depth[i];
size_t reps = 1;
@ -613,7 +620,7 @@ static void MoveToFrontTransform(const uint32_t* BROTLI_RESTRICT v_in,
for (i = 1; i < v_size; ++i) {
if (v_in[i] > max_value) max_value = v_in[i];
}
assert(max_value < 256u);
BROTLI_DCHECK(max_value < 256u);
for (i = 0; i <= max_value; ++i) {
mtf[i] = (uint8_t)i;
}
@ -621,7 +628,7 @@ static void MoveToFrontTransform(const uint32_t* BROTLI_RESTRICT v_in,
size_t mtf_size = max_value + 1;
for (i = 0; i < v_size; ++i) {
size_t index = IndexOf(mtf, mtf_size, (uint8_t)v_in[i]);
assert(index < mtf_size);
BROTLI_DCHECK(index < mtf_size);
v_out[i] = (uint32_t)index;
MoveToFront(mtf, index);
}
@ -653,7 +660,7 @@ static void RunLengthCodeZeros(const size_t in_size,
*max_run_length_prefix = max_prefix;
*out_size = 0;
for (i = 0; i < in_size;) {
assert(*out_size <= i);
BROTLI_DCHECK(*out_size <= i);
if (v[i] != 0) {
v[*out_size] = v[i] + *max_run_length_prefix;
++i;
@ -723,6 +730,7 @@ static void EncodeContextMap(MemoryManager* m,
}
}
BuildAndStoreHuffmanTree(histogram, num_clusters + max_run_length_prefix,
num_clusters + max_run_length_prefix,
tree, depths, bits, storage_ix, storage);
for (i = 0; i < num_rle_symbols; ++i) {
const uint32_t rle_symbol = rle_symbols[i] & kSymbolMask;
@ -782,10 +790,11 @@ static void BuildAndStoreBlockSplitCode(const uint8_t* types,
}
StoreVarLenUint8(num_types - 1, storage_ix, storage);
if (num_types > 1) { /* TODO: else? could StoreBlockSwitch occur? */
BuildAndStoreHuffmanTree(&type_histo[0], num_types + 2, tree,
BuildAndStoreHuffmanTree(&type_histo[0], num_types + 2, num_types + 2, tree,
&code->type_depths[0], &code->type_bits[0],
storage_ix, storage);
BuildAndStoreHuffmanTree(&length_histo[0], BROTLI_NUM_BLOCK_LEN_SYMBOLS,
BROTLI_NUM_BLOCK_LEN_SYMBOLS,
tree, &code->length_depths[0],
&code->length_bits[0], storage_ix, storage);
StoreBlockSwitch(code, lengths[0], types[0], 1, storage_ix, storage);
@ -816,8 +825,8 @@ static void StoreTrivialContextMap(size_t num_types,
for (i = context_bits; i < alphabet_size; ++i) {
histogram[i] = 1;
}
BuildAndStoreHuffmanTree(histogram, alphabet_size, tree,
depths, bits, storage_ix, storage);
BuildAndStoreHuffmanTree(histogram, alphabet_size, alphabet_size,
tree, depths, bits, storage_ix, storage);
for (i = 0; i < num_types; ++i) {
size_t code = (i == 0 ? 0 : i + context_bits - 1);
BrotliWriteBits(depths[code], bits[code], storage_ix, storage);
@ -832,7 +841,7 @@ static void StoreTrivialContextMap(size_t num_types,
/* Manages the encoding of one block category (literal, command or distance). */
typedef struct BlockEncoder {
size_t alphabet_size_;
size_t histogram_length_;
size_t num_block_types_;
const uint8_t* block_types_; /* Not owned. */
const uint32_t* block_lengths_; /* Not owned. */
@ -845,10 +854,10 @@ typedef struct BlockEncoder {
uint16_t* bits_;
} BlockEncoder;
static void InitBlockEncoder(BlockEncoder* self, size_t alphabet_size,
static void InitBlockEncoder(BlockEncoder* self, size_t histogram_length,
size_t num_block_types, const uint8_t* block_types,
const uint32_t* block_lengths, const size_t num_blocks) {
self->alphabet_size_ = alphabet_size;
self->histogram_length_ = histogram_length;
self->num_block_types_ = num_block_types;
self->block_types_ = block_types;
self->block_lengths_ = block_lengths;
@ -884,7 +893,7 @@ static void StoreSymbol(BlockEncoder* self, size_t symbol, size_t* storage_ix,
uint32_t block_len = self->block_lengths_[block_ix];
uint8_t block_type = self->block_types_[block_ix];
self->block_len_ = block_len;
self->entropy_ix_ = block_type * self->alphabet_size_;
self->entropy_ix_ = block_type * self->histogram_length_;
StoreBlockSwitch(&self->block_split_code_, block_len, block_type, 0,
storage_ix, storage);
}
@ -913,7 +922,7 @@ static void StoreSymbolWithContext(BlockEncoder* self, size_t symbol,
--self->block_len_;
{
size_t histo_ix = context_map[self->entropy_ix_ + context];
size_t ix = histo_ix * self->alphabet_size_ + symbol;
size_t ix = histo_ix * self->histogram_length_ + symbol;
BrotliWriteBits(self->depths_[ix], self->bits_[ix], storage_ix, storage);
}
}
@ -939,42 +948,38 @@ static void JumpToByteBoundary(size_t* storage_ix, uint8_t* storage) {
}
void BrotliStoreMetaBlock(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
uint8_t prev_byte,
uint8_t prev_byte2,
BROTLI_BOOL is_last,
uint32_t num_direct_distance_codes,
uint32_t distance_postfix_bits,
ContextType literal_context_mode,
const Command *commands,
size_t n_commands,
const MetaBlockSplit* mb,
size_t *storage_ix,
uint8_t *storage) {
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
uint8_t prev_byte, uint8_t prev_byte2, BROTLI_BOOL is_last,
const BrotliEncoderParams* params, ContextType literal_context_mode,
const Command* commands, size_t n_commands, const MetaBlockSplit* mb,
size_t* storage_ix, uint8_t* storage) {
size_t pos = start_pos;
size_t i;
size_t num_distance_codes =
BROTLI_NUM_DISTANCE_SHORT_CODES + num_direct_distance_codes +
(48u << distance_postfix_bits);
uint32_t num_distance_symbols = params->dist.alphabet_size;
uint32_t num_effective_distance_symbols = num_distance_symbols;
HuffmanTree* tree;
ContextLut literal_context_lut = BROTLI_CONTEXT_LUT(literal_context_mode);
BlockEncoder literal_enc;
BlockEncoder command_enc;
BlockEncoder distance_enc;
const BrotliDistanceParams* dist = &params->dist;
if (params->large_window &&
num_effective_distance_symbols > BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS) {
num_effective_distance_symbols = BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS;
}
StoreCompressedMetaBlockHeader(is_last, length, storage_ix, storage);
tree = BROTLI_ALLOC(m, HuffmanTree, MAX_HUFFMAN_TREE_SIZE);
if (BROTLI_IS_OOM(m)) return;
InitBlockEncoder(&literal_enc, 256, mb->literal_split.num_types,
mb->literal_split.types, mb->literal_split.lengths,
mb->literal_split.num_blocks);
InitBlockEncoder(&literal_enc, BROTLI_NUM_LITERAL_SYMBOLS,
mb->literal_split.num_types, mb->literal_split.types,
mb->literal_split.lengths, mb->literal_split.num_blocks);
InitBlockEncoder(&command_enc, BROTLI_NUM_COMMAND_SYMBOLS,
mb->command_split.num_types, mb->command_split.types,
mb->command_split.lengths, mb->command_split.num_blocks);
InitBlockEncoder(&distance_enc, num_distance_codes,
InitBlockEncoder(&distance_enc, num_effective_distance_symbols,
mb->distance_split.num_types, mb->distance_split.types,
mb->distance_split.lengths, mb->distance_split.num_blocks);
@ -983,9 +988,10 @@ void BrotliStoreMetaBlock(MemoryManager* m,
BuildAndStoreBlockSwitchEntropyCodes(
&distance_enc, tree, storage_ix, storage);
BrotliWriteBits(2, distance_postfix_bits, storage_ix, storage);
BrotliWriteBits(4, num_direct_distance_codes >> distance_postfix_bits,
storage_ix, storage);
BrotliWriteBits(2, dist->distance_postfix_bits, storage_ix, storage);
BrotliWriteBits(
4, dist->num_direct_distance_codes >> dist->distance_postfix_bits,
storage_ix, storage);
for (i = 0; i < mb->literal_split.num_types; ++i) {
BrotliWriteBits(2, literal_context_mode, storage_ix, storage);
}
@ -1011,13 +1017,16 @@ void BrotliStoreMetaBlock(MemoryManager* m,
}
BuildAndStoreEntropyCodesLiteral(m, &literal_enc, mb->literal_histograms,
mb->literal_histograms_size, tree, storage_ix, storage);
mb->literal_histograms_size, BROTLI_NUM_LITERAL_SYMBOLS, tree,
storage_ix, storage);
if (BROTLI_IS_OOM(m)) return;
BuildAndStoreEntropyCodesCommand(m, &command_enc, mb->command_histograms,
mb->command_histograms_size, tree, storage_ix, storage);
mb->command_histograms_size, BROTLI_NUM_COMMAND_SYMBOLS, tree,
storage_ix, storage);
if (BROTLI_IS_OOM(m)) return;
BuildAndStoreEntropyCodesDistance(m, &distance_enc, mb->distance_histograms,
mb->distance_histograms_size, tree, storage_ix, storage);
mb->distance_histograms_size, num_distance_symbols, tree,
storage_ix, storage);
if (BROTLI_IS_OOM(m)) return;
BROTLI_FREE(m, tree);
@ -1035,7 +1044,8 @@ void BrotliStoreMetaBlock(MemoryManager* m,
} else {
size_t j;
for (j = cmd.insert_len_; j != 0; --j) {
size_t context = Context(prev_byte, prev_byte2, literal_context_mode);
size_t context =
BROTLI_CONTEXT(prev_byte, prev_byte2, literal_context_lut);
uint8_t literal = input[pos & mask];
StoreSymbolWithContext(&literal_enc, literal, context,
mb->literal_context_map, storage_ix, storage,
@ -1050,9 +1060,9 @@ void BrotliStoreMetaBlock(MemoryManager* m,
prev_byte2 = input[(pos - 2) & mask];
prev_byte = input[(pos - 1) & mask];
if (cmd.cmd_prefix_ >= 128) {
size_t dist_code = cmd.dist_prefix_;
uint32_t distnumextra = cmd.dist_extra_ >> 24;
uint64_t distextra = cmd.dist_extra_ & 0xffffff;
size_t dist_code = cmd.dist_prefix_ & 0x3FF;
uint32_t distnumextra = cmd.dist_prefix_ >> 10;
uint64_t distextra = cmd.dist_extra_;
if (mb->distance_context_map_size == 0) {
StoreSymbol(&distance_enc, dist_code, storage_ix, storage);
} else {
@ -1076,7 +1086,7 @@ void BrotliStoreMetaBlock(MemoryManager* m,
static void BuildHistograms(const uint8_t* input,
size_t start_pos,
size_t mask,
const Command *commands,
const Command* commands,
size_t n_commands,
HistogramLiteral* lit_histo,
HistogramCommand* cmd_histo,
@ -1093,7 +1103,7 @@ static void BuildHistograms(const uint8_t* input,
}
pos += CommandCopyLen(&cmd);
if (CommandCopyLen(&cmd) && cmd.cmd_prefix_ >= 128) {
HistogramAddDistance(dist_histo, cmd.dist_prefix_);
HistogramAddDistance(dist_histo, cmd.dist_prefix_ & 0x3FF);
}
}
}
@ -1101,7 +1111,7 @@ static void BuildHistograms(const uint8_t* input,
static void StoreDataWithHuffmanCodes(const uint8_t* input,
size_t start_pos,
size_t mask,
const Command *commands,
const Command* commands,
size_t n_commands,
const uint8_t* lit_depth,
const uint16_t* lit_bits,
@ -1128,9 +1138,9 @@ static void StoreDataWithHuffmanCodes(const uint8_t* input,
}
pos += CommandCopyLen(&cmd);
if (CommandCopyLen(&cmd) && cmd.cmd_prefix_ >= 128) {
const size_t dist_code = cmd.dist_prefix_;
const uint32_t distnumextra = cmd.dist_extra_ >> 24;
const uint32_t distextra = cmd.dist_extra_ & 0xffffff;
const size_t dist_code = cmd.dist_prefix_ & 0x3FF;
const uint32_t distnumextra = cmd.dist_prefix_ >> 10;
const uint32_t distextra = cmd.dist_extra_;
BrotliWriteBits(dist_depth[dist_code], dist_bits[dist_code],
storage_ix, storage);
BrotliWriteBits(distnumextra, distextra, storage_ix, storage);
@ -1139,25 +1149,21 @@ static void StoreDataWithHuffmanCodes(const uint8_t* input,
}
void BrotliStoreMetaBlockTrivial(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
BROTLI_BOOL is_last,
const Command *commands,
size_t n_commands,
size_t *storage_ix,
uint8_t *storage) {
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
BROTLI_BOOL is_last, const BrotliEncoderParams* params,
const Command* commands, size_t n_commands,
size_t* storage_ix, uint8_t* storage) {
HistogramLiteral lit_histo;
HistogramCommand cmd_histo;
HistogramDistance dist_histo;
uint8_t lit_depth[256];
uint16_t lit_bits[256];
uint8_t lit_depth[BROTLI_NUM_LITERAL_SYMBOLS];
uint16_t lit_bits[BROTLI_NUM_LITERAL_SYMBOLS];
uint8_t cmd_depth[BROTLI_NUM_COMMAND_SYMBOLS];
uint16_t cmd_bits[BROTLI_NUM_COMMAND_SYMBOLS];
uint8_t dist_depth[64];
uint16_t dist_bits[64];
uint8_t dist_depth[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
uint16_t dist_bits[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
HuffmanTree* tree;
uint32_t num_distance_symbols = params->dist.alphabet_size;
StoreCompressedMetaBlockHeader(is_last, length, storage_ix, storage);
@ -1172,13 +1178,16 @@ void BrotliStoreMetaBlockTrivial(MemoryManager* m,
tree = BROTLI_ALLOC(m, HuffmanTree, MAX_HUFFMAN_TREE_SIZE);
if (BROTLI_IS_OOM(m)) return;
BuildAndStoreHuffmanTree(lit_histo.data_, 256, tree,
BuildAndStoreHuffmanTree(lit_histo.data_, BROTLI_NUM_LITERAL_SYMBOLS,
BROTLI_NUM_LITERAL_SYMBOLS, tree,
lit_depth, lit_bits,
storage_ix, storage);
BuildAndStoreHuffmanTree(cmd_histo.data_, BROTLI_NUM_COMMAND_SYMBOLS, tree,
BuildAndStoreHuffmanTree(cmd_histo.data_, BROTLI_NUM_COMMAND_SYMBOLS,
BROTLI_NUM_COMMAND_SYMBOLS, tree,
cmd_depth, cmd_bits,
storage_ix, storage);
BuildAndStoreHuffmanTree(dist_histo.data_, 64, tree,
BuildAndStoreHuffmanTree(dist_histo.data_, MAX_SIMPLE_DISTANCE_ALPHABET_SIZE,
num_distance_symbols, tree,
dist_depth, dist_bits,
storage_ix, storage);
BROTLI_FREE(m, tree);
@ -1193,15 +1202,14 @@ void BrotliStoreMetaBlockTrivial(MemoryManager* m,
}
void BrotliStoreMetaBlockFast(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
BROTLI_BOOL is_last,
const Command *commands,
size_t n_commands,
size_t *storage_ix,
uint8_t *storage) {
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
BROTLI_BOOL is_last, const BrotliEncoderParams* params,
const Command* commands, size_t n_commands,
size_t* storage_ix, uint8_t* storage) {
uint32_t num_distance_symbols = params->dist.alphabet_size;
uint32_t distance_alphabet_bits =
Log2FloorNonZero(num_distance_symbols - 1) + 1;
StoreCompressedMetaBlockHeader(is_last, length, storage_ix, storage);
BrotliWriteBits(13, 0, storage_ix, storage);
@ -1245,8 +1253,8 @@ void BrotliStoreMetaBlockFast(MemoryManager* m,
uint16_t lit_bits[BROTLI_NUM_LITERAL_SYMBOLS];
uint8_t cmd_depth[BROTLI_NUM_COMMAND_SYMBOLS];
uint16_t cmd_bits[BROTLI_NUM_COMMAND_SYMBOLS];
uint8_t dist_depth[64];
uint16_t dist_bits[64];
uint8_t dist_depth[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
uint16_t dist_bits[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
HistogramClearLiteral(&lit_histo);
HistogramClearCommand(&cmd_histo);
HistogramClearDistance(&dist_histo);
@ -1266,7 +1274,8 @@ void BrotliStoreMetaBlockFast(MemoryManager* m,
if (BROTLI_IS_OOM(m)) return;
BrotliBuildAndStoreHuffmanTreeFast(m, dist_histo.data_,
dist_histo.total_count_,
/* max_bits = */ 6,
/* max_bits = */
distance_alphabet_bits,
dist_depth, dist_bits,
storage_ix, storage);
if (BROTLI_IS_OOM(m)) return;
@ -1285,11 +1294,11 @@ void BrotliStoreMetaBlockFast(MemoryManager* m,
/* This is for storing uncompressed blocks (simple raw storage of
bytes-as-bytes). */
void BrotliStoreUncompressedMetaBlock(BROTLI_BOOL is_final_block,
const uint8_t * BROTLI_RESTRICT input,
const uint8_t* BROTLI_RESTRICT input,
size_t position, size_t mask,
size_t len,
size_t * BROTLI_RESTRICT storage_ix,
uint8_t * BROTLI_RESTRICT storage) {
size_t* BROTLI_RESTRICT storage_ix,
uint8_t* BROTLI_RESTRICT storage) {
size_t masked_pos = position & mask;
BrotliStoreUncompressedMetaBlockHeader(len, storage_ix, storage);
JumpToByteBoundary(storage_ix, storage);
@ -1317,18 +1326,6 @@ void BrotliStoreUncompressedMetaBlock(BROTLI_BOOL is_final_block,
}
}
void BrotliStoreSyncMetaBlock(size_t* BROTLI_RESTRICT storage_ix,
uint8_t* BROTLI_RESTRICT storage) {
/* Empty metadata meta-block bit pattern:
1 bit: is_last (0)
2 bits: num nibbles (3)
1 bit: reserved (0)
2 bits: metadata length bytes (0) */
BrotliWriteBits(6, 6, storage_ix, storage);
JumpToByteBoundary(storage_ix, storage);
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

63
BaseTools/Source/C/BrotliCompress/enc/brotli_bit_stream.h
View File

@ -16,13 +16,13 @@
#ifndef BROTLI_ENC_BROTLI_BIT_STREAM_H_
#define BROTLI_ENC_BROTLI_BIT_STREAM_H_
#include "../common/types.h"
#include "../common/context.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./command.h"
#include "./context.h"
#include "./entropy_encode.h"
#include "./memory.h"
#include "./metablock.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -32,7 +32,7 @@ extern "C" {
position for the current storage. */
BROTLI_INTERNAL void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
HuffmanTree* tree, size_t *storage_ix, uint8_t *storage);
HuffmanTree* tree, size_t* storage_ix, uint8_t* storage);
BROTLI_INTERNAL void BrotliBuildAndStoreHuffmanTreeFast(
MemoryManager* m, const uint32_t* histogram, const size_t histogram_total,
@ -42,63 +42,40 @@ BROTLI_INTERNAL void BrotliBuildAndStoreHuffmanTreeFast(
/* REQUIRES: length > 0 */
/* REQUIRES: length <= (1 << 24) */
BROTLI_INTERNAL void BrotliStoreMetaBlock(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
uint8_t prev_byte,
uint8_t prev_byte2,
BROTLI_BOOL is_final_block,
uint32_t num_direct_distance_codes,
uint32_t distance_postfix_bits,
ContextType literal_context_mode,
const Command* commands,
size_t n_commands,
const MetaBlockSplit* mb,
size_t* storage_ix,
uint8_t* storage);
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
uint8_t prev_byte, uint8_t prev_byte2, BROTLI_BOOL is_last,
const BrotliEncoderParams* params, ContextType literal_context_mode,
const Command* commands, size_t n_commands, const MetaBlockSplit* mb,
size_t* storage_ix, uint8_t* storage);
/* Stores the meta-block without doing any block splitting, just collects
one histogram per block category and uses that for entropy coding.
REQUIRES: length > 0
REQUIRES: length <= (1 << 24) */
BROTLI_INTERNAL void BrotliStoreMetaBlockTrivial(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
BROTLI_BOOL is_last,
const Command *commands,
size_t n_commands,
size_t* storage_ix,
uint8_t* storage);
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
BROTLI_BOOL is_last, const BrotliEncoderParams* params,
const Command* commands, size_t n_commands,
size_t* storage_ix, uint8_t* storage);
/* Same as above, but uses static prefix codes for histograms with a only a few
symbols, and uses static code length prefix codes for all other histograms.
REQUIRES: length > 0
REQUIRES: length <= (1 << 24) */
BROTLI_INTERNAL void BrotliStoreMetaBlockFast(MemoryManager* m,
const uint8_t* input,
size_t start_pos,
size_t length,
size_t mask,
BROTLI_BOOL is_last,
const Command *commands,
size_t n_commands,
size_t* storage_ix,
uint8_t* storage);
const uint8_t* input, size_t start_pos, size_t length, size_t mask,
BROTLI_BOOL is_last, const BrotliEncoderParams* params,
const Command* commands, size_t n_commands,
size_t* storage_ix, uint8_t* storage);
/* This is for storing uncompressed blocks (simple raw storage of
bytes-as-bytes).
REQUIRES: length > 0
REQUIRES: length <= (1 << 24) */
BROTLI_INTERNAL void BrotliStoreUncompressedMetaBlock(
BROTLI_BOOL is_final_block, const uint8_t* input, size_t position,
size_t mask, size_t len, size_t* storage_ix, uint8_t* storage);
/* Stores an empty metadata meta-block and syncs to a byte boundary. */
BROTLI_INTERNAL void BrotliStoreSyncMetaBlock(size_t* storage_ix,
uint8_t* storage);
BROTLI_BOOL is_final_block, const uint8_t* BROTLI_RESTRICT input,
size_t position, size_t mask, size_t len,
size_t* BROTLI_RESTRICT storage_ix, uint8_t* BROTLI_RESTRICT storage);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */

4
BaseTools/Source/C/BrotliCompress/enc/cluster.c
View File

@ -8,12 +8,12 @@
#include "./cluster.h"
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./bit_cost.h" /* BrotliPopulationCost */
#include "./fast_log.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {

4
BaseTools/Source/C/BrotliCompress/enc/cluster.h
View File

@ -9,10 +9,10 @@
#ifndef BROTLI_ENC_CLUSTER_H_
#define BROTLI_ENC_CLUSTER_H_
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {

2
BaseTools/Source/C/BrotliCompress/enc/cluster_inc.h
View File

@ -17,6 +17,8 @@ BROTLI_INTERNAL void FN(BrotliCompareAndPushToQueue)(
size_t* num_pairs) CODE({
BROTLI_BOOL is_good_pair = BROTLI_FALSE;
HistogramPair p;
p.idx1 = p.idx2 = 0;
p.cost_diff = p.cost_combo = 0;
if (idx1 == idx2) {
return;
}

83
BaseTools/Source/C/BrotliCompress/enc/command.h
View File

@ -9,9 +9,11 @@
#ifndef BROTLI_ENC_COMMAND_H_
#define BROTLI_ENC_COMMAND_H_
#include "../common/types.h"
#include "../common/port.h"
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./fast_log.h"
#include "./params.h"
#include "./prefix.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -60,15 +62,21 @@ static BROTLI_INLINE uint16_t GetCopyLengthCode(size_t copylen) {
static BROTLI_INLINE uint16_t CombineLengthCodes(
uint16_t inscode, uint16_t copycode, BROTLI_BOOL use_last_distance) {
uint16_t bits64 =
(uint16_t)((copycode & 0x7u) | ((inscode & 0x7u) << 3));
if (use_last_distance && inscode < 8 && copycode < 16) {
return (copycode < 8) ? bits64 : (bits64 | 64);
(uint16_t)((copycode & 0x7u) | ((inscode & 0x7u) << 3u));
if (use_last_distance && inscode < 8u && copycode < 16u) {
return (copycode < 8u) ? bits64 : (bits64 | 64u);
} else {
/* "To convert an insert-and-copy length code to an insert length code and
a copy length code, the following table can be used" */
static const uint16_t cells[9] = { 128u, 192u, 384u, 256u, 320u, 512u,
448u, 576u, 640u };
return cells[(copycode >> 3) + 3 * (inscode >> 3)] | bits64;
/* Specification: 5 Encoding of ... (last table) */
/* offset = 2 * index, where index is in range [0..8] */
uint32_t offset = 2u * ((copycode >> 3u) + 3u * (inscode >> 3u));
/* All values in specification are K * 64,
where K = [2, 3, 6, 4, 5, 8, 7, 9, 10],
i + 1 = [1, 2, 3, 4, 5, 6, 7, 8, 9],
K - i - 1 = [1, 1, 3, 0, 0, 2, 0, 1, 2] = D.
All values in D require only 2 bits to encode.
Magic constant is shifted 6 bits left, to avoid final multiplication. */
offset = (offset << 5u) + 0x40u + ((0x520D40u >> offset) & 0xC0u);
return (uint16_t)(offset | bits64);
}
}
@ -98,44 +106,61 @@ static BROTLI_INLINE uint32_t GetCopyExtra(uint16_t copycode) {
typedef struct Command {
uint32_t insert_len_;
/* Stores copy_len in low 24 bits and copy_len XOR copy_code in high 8 bit. */
/* Stores copy_len in low 25 bits and copy_code - copy_len in high 7 bit. */
uint32_t copy_len_;
/* Stores distance extra bits. */
uint32_t dist_extra_;
uint16_t cmd_prefix_;
/* Stores distance code in low 10 bits
and number of extra bits in high 6 bits. */
uint16_t dist_prefix_;
} Command;
/* distance_code is e.g. 0 for same-as-last short code, or 16 for offset 1. */
static BROTLI_INLINE void InitCommand(Command* self, size_t insertlen,
size_t copylen, size_t copylen_code, size_t distance_code) {
static BROTLI_INLINE void InitCommand(Command* self,
const BrotliDistanceParams* dist, size_t insertlen,
size_t copylen, int copylen_code_delta, size_t distance_code) {
/* Don't rely on signed int representation, use honest casts. */
uint32_t delta = (uint8_t)((int8_t)copylen_code_delta);
self->insert_len_ = (uint32_t)insertlen;
self->copy_len_ = (uint32_t)(copylen | ((copylen_code ^ copylen) << 24));
self->copy_len_ = (uint32_t)(copylen | (delta << 25));
/* The distance prefix and extra bits are stored in this Command as if
npostfix and ndirect were 0, they are only recomputed later after the
clustering if needed. */
PrefixEncodeCopyDistance(
distance_code, 0, 0, &self->dist_prefix_, &self->dist_extra_);
distance_code, dist->num_direct_distance_codes,
dist->distance_postfix_bits, &self->dist_prefix_, &self->dist_extra_);
GetLengthCode(
insertlen, copylen_code, TO_BROTLI_BOOL(self->dist_prefix_ == 0),
&self->cmd_prefix_);
insertlen, (size_t)((int)copylen + copylen_code_delta),
TO_BROTLI_BOOL((self->dist_prefix_ & 0x3FF) == 0), &self->cmd_prefix_);
}
static BROTLI_INLINE void InitInsertCommand(Command* self, size_t insertlen) {
self->insert_len_ = (uint32_t)insertlen;
self->copy_len_ = 4 << 24;
self->copy_len_ = 4 << 25;
self->dist_extra_ = 0;
self->dist_prefix_ = 16;
self->dist_prefix_ = BROTLI_NUM_DISTANCE_SHORT_CODES;
GetLengthCode(insertlen, 4, BROTLI_FALSE, &self->cmd_prefix_);
}
static BROTLI_INLINE uint32_t CommandDistanceCode(const Command* self) {
if (self->dist_prefix_ < 16) {
return self->dist_prefix_;
static BROTLI_INLINE uint32_t CommandRestoreDistanceCode(
const Command* self, const BrotliDistanceParams* dist) {
if ((self->dist_prefix_ & 0x3FFu) <
BROTLI_NUM_DISTANCE_SHORT_CODES + dist->num_direct_distance_codes) {
return self->dist_prefix_ & 0x3FFu;
} else {
uint32_t nbits = self->dist_extra_ >> 24;
uint32_t extra = self->dist_extra_ & 0xffffff;
uint32_t prefix = self->dist_prefix_ - 12u - 2u * nbits;
return (prefix << nbits) + extra + 12;
uint32_t dcode = self->dist_prefix_ & 0x3FFu;
uint32_t nbits = self->dist_prefix_ >> 10;
uint32_t extra = self->dist_extra_;
uint32_t postfix_mask = (1U << dist->distance_postfix_bits) - 1U;
uint32_t hcode = (dcode - dist->num_direct_distance_codes -
BROTLI_NUM_DISTANCE_SHORT_CODES) >>
dist->distance_postfix_bits;
uint32_t lcode = (dcode - dist->num_direct_distance_codes -
BROTLI_NUM_DISTANCE_SHORT_CODES) & postfix_mask;
uint32_t offset = ((2U + (hcode & 1U)) << nbits) - 4U;
return ((offset + extra) << dist->distance_postfix_bits) + lcode +
dist->num_direct_distance_codes + BROTLI_NUM_DISTANCE_SHORT_CODES;
}
}
@ -149,11 +174,13 @@ static BROTLI_INLINE uint32_t CommandDistanceContext(const Command* self) {
}
static BROTLI_INLINE uint32_t CommandCopyLen(const Command* self) {
return self->copy_len_ & 0xFFFFFF;
return self->copy_len_ & 0x1FFFFFF;
}
static BROTLI_INLINE uint32_t CommandCopyLenCode(const Command* self) {
return (self->copy_len_ & 0xFFFFFF) ^ (self->copy_len_ >> 24);
uint32_t modifier = self->copy_len_ >> 25;
int32_t delta = (int8_t)((uint8_t)(modifier | ((modifier & 0x40) << 1)));
return (uint32_t)((int32_t)(self->copy_len_ & 0x1FFFFFF) + delta);
}
#if defined(__cplusplus) || defined(c_plusplus)

189
BaseTools/Source/C/BrotliCompress/enc/compress_fragment.c
View File

@ -16,37 +16,39 @@
#include <string.h> /* memcmp, memcpy, memset */
#include "../common/types.h"
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./brotli_bit_stream.h"
#include "./entropy_encode.h"
#include "./fast_log.h"
#include "./find_match_length.h"
#include "./memory.h"
#include "./port.h"
#include "./write_bits.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define MAX_DISTANCE (long)BROTLI_MAX_BACKWARD_LIMIT(18)
/* kHashMul32 multiplier has these properties:
* The multiplier must be odd. Otherwise we may lose the highest bit.
* No long streaks of 1s or 0s.
* No long streaks of ones or zeros.
* There is no effort to ensure that it is a prime, the oddity is enough
for this use.
* The number has been tuned heuristically against compression benchmarks. */
static const uint32_t kHashMul32 = 0x1e35a7bd;
static const uint32_t kHashMul32 = 0x1E35A7BD;
static BROTLI_INLINE uint32_t Hash(const uint8_t* p, size_t shift) {
const uint64_t h = (BROTLI_UNALIGNED_LOAD64(p) << 24) * kHashMul32;
const uint64_t h = (BROTLI_UNALIGNED_LOAD64LE(p) << 24) * kHashMul32;
return (uint32_t)(h >> shift);
}
static BROTLI_INLINE uint32_t HashBytesAtOffset(
uint64_t v, int offset, size_t shift) {
assert(offset >= 0);
assert(offset <= 3);
BROTLI_DCHECK(offset >= 0);
BROTLI_DCHECK(offset <= 3);
{
const uint64_t h = ((v >> (8 * offset)) << 24) * kHashMul32;
return (uint32_t)(h >> shift);
@ -55,7 +57,7 @@ static BROTLI_INLINE uint32_t HashBytesAtOffset(
static BROTLI_INLINE BROTLI_BOOL IsMatch(const uint8_t* p1, const uint8_t* p2) {
return TO_BROTLI_BOOL(
BROTLI_UNALIGNED_LOAD32(p1) == BROTLI_UNALIGNED_LOAD32(p2) &&
BrotliUnalignedRead32(p1) == BrotliUnalignedRead32(p2) &&
p1[4] == p2[4]);
}
@ -132,7 +134,7 @@ static void BuildAndStoreCommandPrefixCode(const uint32_t histogram[128],
BrotliCreateHuffmanTree(histogram, 64, 15, tree, depth);
BrotliCreateHuffmanTree(&histogram[64], 64, 14, tree, &depth[64]);
/* We have to jump through a few hoopes here in order to compute
/* We have to jump through a few hoops here in order to compute
the command bits because the symbols are in a different order than in
the full alphabet. This looks complicated, but having the symbols
in this order in the command bits saves a few branches in the Emit*
@ -200,7 +202,7 @@ static BROTLI_INLINE void EmitInsertLen(size_t insertlen,
} else {
BrotliWriteBits(depth[61], bits[61], storage_ix, storage);
BrotliWriteBits(12, insertlen - 2114, storage_ix, storage);
++histo[21];
++histo[61];
}
}
@ -213,11 +215,11 @@ static BROTLI_INLINE void EmitLongInsertLen(size_t insertlen,
if (insertlen < 22594) {
BrotliWriteBits(depth[62], bits[62], storage_ix, storage);
BrotliWriteBits(14, insertlen - 6210, storage_ix, storage);
++histo[22];
++histo[62];
} else {
BrotliWriteBits(depth[63], bits[63], storage_ix, storage);
BrotliWriteBits(24, insertlen - 22594, storage_ix, storage);
++histo[23];
++histo[63];
}
}
@ -249,7 +251,7 @@ static BROTLI_INLINE void EmitCopyLen(size_t copylen,
} else {
BrotliWriteBits(depth[39], bits[39], storage_ix, storage);
BrotliWriteBits(24, copylen - 2118, storage_ix, storage);
++histo[47];
++histo[39];
}
}
@ -291,7 +293,7 @@ static BROTLI_INLINE void EmitCopyLenLastDistance(size_t copylen,
BrotliWriteBits(depth[39], bits[39], storage_ix, storage);
BrotliWriteBits(24, copylen - 2120, storage_ix, storage);
BrotliWriteBits(depth[64], bits[64], storage_ix, storage);
++histo[47];
++histo[39];
++histo[64];
}
}
@ -322,27 +324,26 @@ static BROTLI_INLINE void EmitLiterals(const uint8_t* input, const size_t len,
}
}
/* REQUIRES: len <= 1 << 20. */
/* REQUIRES: len <= 1 << 24. */
static void BrotliStoreMetaBlockHeader(
size_t len, BROTLI_BOOL is_uncompressed, size_t* storage_ix,
uint8_t* storage) {
size_t nibbles = 6;
/* ISLAST */
BrotliWriteBits(1, 0, storage_ix, storage);
if (len <= (1U << 16)) {
/* MNIBBLES is 4 */
BrotliWriteBits(2, 0, storage_ix, storage);
BrotliWriteBits(16, len - 1, storage_ix, storage);
} else {
/* MNIBBLES is 5 */
BrotliWriteBits(2, 1, storage_ix, storage);
BrotliWriteBits(20, len - 1, storage_ix, storage);
nibbles = 4;
} else if (len <= (1U << 20)) {
nibbles = 5;
}
BrotliWriteBits(2, nibbles - 4, storage_ix, storage);
BrotliWriteBits(nibbles * 4, len - 1, storage_ix, storage);
/* ISUNCOMPRESSED */
BrotliWriteBits(1, (uint64_t)is_uncompressed, storage_ix, storage);
}
static void UpdateBits(size_t n_bits, uint32_t bits, size_t pos,
uint8_t *array) {
uint8_t* array) {
while (n_bits > 0) {
size_t byte_pos = pos >> 3;
size_t n_unchanged_bits = pos & 7;
@ -421,13 +422,11 @@ static uint32_t kCmdHistoSeed[128] = {
1, 1, 1, 1, 0, 0, 0, 0,
};
void BrotliCompressFragmentFast(MemoryManager* m,
const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last,
int* table, size_t table_size,
uint8_t cmd_depth[128], uint16_t cmd_bits[128],
size_t* cmd_code_numbits, uint8_t* cmd_code,
size_t* storage_ix, uint8_t* storage) {
static BROTLI_INLINE void BrotliCompressFragmentFastImpl(
MemoryManager* m, const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last, int* table, size_t table_bits, uint8_t cmd_depth[128],
uint16_t cmd_bits[128], size_t* cmd_code_numbits, uint8_t* cmd_code,
size_t* storage_ix, uint8_t* storage) {
uint32_t cmd_histo[128];
const uint8_t* ip_end;
@ -442,7 +441,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
static const size_t kFirstBlockSize = 3 << 15;
static const size_t kMergeBlockSize = 1 << 16;
const size_t kInputMarginBytes = 16;
const size_t kInputMarginBytes = BROTLI_WINDOW_GAP;
const size_t kMinMatchLen = 5;
const uint8_t* metablock_start = input;
@ -460,21 +459,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
const uint8_t* ip;
int last_distance;
const size_t shift = 64u - Log2FloorNonZero(table_size);
assert(table_size);
assert(table_size <= (1u << 31));
/* table must be power of two */
assert((table_size & (table_size - 1)) == 0);
assert(table_size - 1 ==
(size_t)(MAKE_UINT64_T(0xFFFFFFFF, 0xFFFFFF) >> shift));
if (input_size == 0) {
assert(is_last);
BrotliWriteBits(1, 1, storage_ix, storage); /* islast */
BrotliWriteBits(1, 1, storage_ix, storage); /* isempty */
*storage_ix = (*storage_ix + 7u) & ~7u;
return;
}
const size_t shift = 64u - table_bits;
BrotliStoreMetaBlockHeader(block_size, 0, storage_ix, storage);
/* No block splits, no contexts. */
@ -506,7 +491,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
last_distance = -1;
ip_end = input + block_size;
if (PREDICT_TRUE(block_size >= kInputMarginBytes)) {
if (BROTLI_PREDICT_TRUE(block_size >= kInputMarginBytes)) {
/* For the last block, we need to keep a 16 bytes margin so that we can be
sure that all distances are at most window size - 16.
For all other blocks, we only need to keep a margin of 5 bytes so that
@ -530,40 +515,44 @@ void BrotliCompressFragmentFast(MemoryManager* m,
and doesn't bother looking for matches everywhere.
The "skip" variable keeps track of how many bytes there are since the
last match; dividing it by 32 (ie. right-shifting by five) gives the
last match; dividing it by 32 (i.e. right-shifting by five) gives the
number of bytes to move ahead for each iteration. */
uint32_t skip = 32;
const uint8_t* next_ip = ip;
const uint8_t* candidate;
assert(next_emit < ip);
BROTLI_DCHECK(next_emit < ip);
trawl:
do {
uint32_t hash = next_hash;
uint32_t bytes_between_hash_lookups = skip++ >> 5;
assert(hash == Hash(next_ip, shift));
BROTLI_DCHECK(hash == Hash(next_ip, shift));
ip = next_ip;
next_ip = ip + bytes_between_hash_lookups;
if (PREDICT_FALSE(next_ip > ip_limit)) {
if (BROTLI_PREDICT_FALSE(next_ip > ip_limit)) {
goto emit_remainder;
}
next_hash = Hash(next_ip, shift);
candidate = ip - last_distance;
if (IsMatch(ip, candidate)) {
if (PREDICT_TRUE(candidate < ip)) {
if (BROTLI_PREDICT_TRUE(candidate < ip)) {
table[hash] = (int)(ip - base_ip);
break;
}
}
candidate = base_ip + table[hash];
assert(candidate >= base_ip);
assert(candidate < ip);
BROTLI_DCHECK(candidate >= base_ip);
BROTLI_DCHECK(candidate < ip);
table[hash] = (int)(ip - base_ip);
} while (PREDICT_TRUE(!IsMatch(ip, candidate)));
} while (BROTLI_PREDICT_TRUE(!IsMatch(ip, candidate)));
/* Check copy distance. If candidate is not feasible, continue search.
Checking is done outside of hot loop to reduce overhead. */
if (ip - candidate > MAX_DISTANCE) goto trawl;
/* Step 2: Emit the found match together with the literal bytes from
"next_emit" to the bit stream, and then see if we can find a next macth
"next_emit" to the bit stream, and then see if we can find a next match
immediately afterwards. Repeat until we find no match for the input
without emitting some literal bytes. */
@ -576,8 +565,8 @@ void BrotliCompressFragmentFast(MemoryManager* m,
int distance = (int)(base - candidate); /* > 0 */
size_t insert = (size_t)(base - next_emit);
ip += matched;
assert(0 == memcmp(base, candidate, matched));
if (PREDICT_TRUE(insert < 6210)) {
BROTLI_DCHECK(0 == memcmp(base, candidate, matched));
if (BROTLI_PREDICT_TRUE(insert < 6210)) {
EmitInsertLen(insert, cmd_depth, cmd_bits, cmd_histo,
storage_ix, storage);
} else if (ShouldUseUncompressedMode(metablock_start, next_emit, insert,
@ -606,14 +595,14 @@ void BrotliCompressFragmentFast(MemoryManager* m,
storage_ix, storage);
next_emit = ip;
if (PREDICT_FALSE(ip >= ip_limit)) {
if (BROTLI_PREDICT_FALSE(ip >= ip_limit)) {
goto emit_remainder;
}
/* We could immediately start working at ip now, but to improve
compression we first update "table" with the hashes of some positions
within the last copy. */
{
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 3);
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 3);
uint32_t prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
uint32_t cur_hash = HashBytesAtOffset(input_bytes, 3, shift);
table[prev_hash] = (int)(ip - base_ip - 3);
@ -633,23 +622,24 @@ void BrotliCompressFragmentFast(MemoryManager* m,
const uint8_t* base = ip;
size_t matched = 5 + FindMatchLengthWithLimit(
candidate + 5, ip + 5, (size_t)(ip_end - ip) - 5);
if (ip - candidate > MAX_DISTANCE) break;
ip += matched;
last_distance = (int)(base - candidate); /* > 0 */
assert(0 == memcmp(base, candidate, matched));
BROTLI_DCHECK(0 == memcmp(base, candidate, matched));
EmitCopyLen(matched, cmd_depth, cmd_bits, cmd_histo,
storage_ix, storage);
EmitDistance((size_t)last_distance, cmd_depth, cmd_bits,
cmd_histo, storage_ix, storage);
next_emit = ip;
if (PREDICT_FALSE(ip >= ip_limit)) {
if (BROTLI_PREDICT_FALSE(ip >= ip_limit)) {
goto emit_remainder;
}
/* We could immediately start working at ip now, but to improve
compression we first update "table" with the hashes of some positions
within the last copy. */
{
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 3);
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 3);
uint32_t prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
uint32_t cur_hash = HashBytesAtOffset(input_bytes, 3, shift);
table[prev_hash] = (int)(ip - base_ip - 3);
@ -668,7 +658,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
}
emit_remainder:
assert(next_emit <= ip_end);
BROTLI_DCHECK(next_emit <= ip_end);
input += block_size;
input_size -= block_size;
block_size = BROTLI_MIN(size_t, input_size, kMergeBlockSize);
@ -678,7 +668,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
if (input_size > 0 &&
total_block_size + block_size <= (1 << 20) &&
ShouldMergeBlock(input, block_size, lit_depth)) {
assert(total_block_size > (1 << 16));
BROTLI_DCHECK(total_block_size > (1 << 16));
/* Update the size of the current meta-block and continue emitting commands.
We can do this because the current size and the new size both have 5
nibbles. */
@ -690,7 +680,7 @@ void BrotliCompressFragmentFast(MemoryManager* m,
/* Emit the remaining bytes as literals. */
if (next_emit < ip_end) {
const size_t insert = (size_t)(ip_end - next_emit);
if (PREDICT_TRUE(insert < 6210)) {
if (BROTLI_PREDICT_TRUE(insert < 6210)) {
EmitInsertLen(insert, cmd_depth, cmd_bits, cmd_histo,
storage_ix, storage);
EmitLiterals(next_emit, insert, lit_depth, lit_bits, storage_ix, storage);
@ -728,11 +718,7 @@ next_block:
goto emit_commands;
}
if (is_last) {
BrotliWriteBits(1, 1, storage_ix, storage); /* islast */
BrotliWriteBits(1, 1, storage_ix, storage); /* isempty */
*storage_ix = (*storage_ix + 7u) & ~7u;
} else {
if (!is_last) {
/* If this is not the last block, update the command and distance prefix
codes for the next block and store the compressed forms. */
cmd_code[0] = 0;
@ -742,6 +728,63 @@ next_block:
}
}
#define FOR_TABLE_BITS_(X) X(9) X(11) X(13) X(15)
#define BAKE_METHOD_PARAM_(B) \
static BROTLI_NOINLINE void BrotliCompressFragmentFastImpl ## B( \
MemoryManager* m, const uint8_t* input, size_t input_size, \
BROTLI_BOOL is_last, int* table, uint8_t cmd_depth[128], \
uint16_t cmd_bits[128], size_t* cmd_code_numbits, uint8_t* cmd_code, \
size_t* storage_ix, uint8_t* storage) { \
BrotliCompressFragmentFastImpl(m, input, input_size, is_last, table, B, \
cmd_depth, cmd_bits, cmd_code_numbits, cmd_code, storage_ix, storage); \
}
FOR_TABLE_BITS_(BAKE_METHOD_PARAM_)
#undef BAKE_METHOD_PARAM_
void BrotliCompressFragmentFast(
MemoryManager* m, const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last, int* table, size_t table_size, uint8_t cmd_depth[128],
uint16_t cmd_bits[128], size_t* cmd_code_numbits, uint8_t* cmd_code,
size_t* storage_ix, uint8_t* storage) {
const size_t initial_storage_ix = *storage_ix;
const size_t table_bits = Log2FloorNonZero(table_size);
if (input_size == 0) {
BROTLI_DCHECK(is_last);
BrotliWriteBits(1, 1, storage_ix, storage); /* islast */
BrotliWriteBits(1, 1, storage_ix, storage); /* isempty */
*storage_ix = (*storage_ix + 7u) & ~7u;
return;
}
switch (table_bits) {
#define CASE_(B) \
case B: \
BrotliCompressFragmentFastImpl ## B( \
m, input, input_size, is_last, table, cmd_depth, cmd_bits, \
cmd_code_numbits, cmd_code, storage_ix, storage); \
break;
FOR_TABLE_BITS_(CASE_)
#undef CASE_
default: BROTLI_DCHECK(0); break;
}
/* If output is larger than single uncompressed block, rewrite it. */
if (*storage_ix - initial_storage_ix > 31 + (input_size << 3)) {
EmitUncompressedMetaBlock(input, input + input_size, initial_storage_ix,
storage_ix, storage);
}
if (is_last) {
BrotliWriteBits(1, 1, storage_ix, storage); /* islast */
BrotliWriteBits(1, 1, storage_ix, storage); /* isempty */
*storage_ix = (*storage_ix + 7u) & ~7u;
}
}
#undef FOR_TABLE_BITS_
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

9
BaseTools/Source/C/BrotliCompress/enc/compress_fragment.h
View File

@ -12,9 +12,9 @@
#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_H_
#define BROTLI_ENC_COMPRESS_FRAGMENT_H_
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./memory.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -37,8 +37,11 @@ extern "C" {
updated to represent the updated "cmd_depth" and "cmd_bits".
REQUIRES: "input_size" is greater than zero, or "is_last" is 1.
REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24).
REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero.
REQUIRES: "table_size" is a power of two */
REQUIRES: "table_size" is an odd (9, 11, 13, 15) power of two
OUTPUT: maximal copy distance <= |input_size|
OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */
BROTLI_INTERNAL void BrotliCompressFragmentFast(MemoryManager* m,
const uint8_t* input,
size_t input_size,

296
BaseTools/Source/C/BrotliCompress/enc/compress_fragment_two_pass.c
View File

@ -14,49 +14,54 @@
#include <string.h> /* memcmp, memcpy, memset */
#include "../common/types.h"
#include "../common/constants.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./bit_cost.h"
#include "./brotli_bit_stream.h"
#include "./entropy_encode.h"
#include "./fast_log.h"
#include "./find_match_length.h"
#include "./memory.h"
#include "./port.h"
#include "./write_bits.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define MAX_DISTANCE (long)BROTLI_MAX_BACKWARD_LIMIT(18)
/* kHashMul32 multiplier has these properties:
* The multiplier must be odd. Otherwise we may lose the highest bit.
* No long streaks of 1s or 0s.
* No long streaks of ones or zeros.
* There is no effort to ensure that it is a prime, the oddity is enough
for this use.
* The number has been tuned heuristically against compression benchmarks. */
static const uint32_t kHashMul32 = 0x1e35a7bd;
static const uint32_t kHashMul32 = 0x1E35A7BD;
static BROTLI_INLINE uint32_t Hash(const uint8_t* p, size_t shift) {
const uint64_t h = (BROTLI_UNALIGNED_LOAD64(p) << 16) * kHashMul32;
static BROTLI_INLINE uint32_t Hash(const uint8_t* p,
size_t shift, size_t length) {
const uint64_t h =
(BROTLI_UNALIGNED_LOAD64LE(p) << ((8 - length) * 8)) * kHashMul32;
return (uint32_t)(h >> shift);
}
static BROTLI_INLINE uint32_t HashBytesAtOffset(
uint64_t v, int offset, size_t shift) {
assert(offset >= 0);
assert(offset <= 2);
static BROTLI_INLINE uint32_t HashBytesAtOffset(uint64_t v, size_t offset,
size_t shift, size_t length) {
BROTLI_DCHECK(offset <= 8 - length);
{
const uint64_t h = ((v >> (8 * offset)) << 16) * kHashMul32;
const uint64_t h = ((v >> (8 * offset)) << ((8 - length) * 8)) * kHashMul32;
return (uint32_t)(h >> shift);
}
}
static BROTLI_INLINE BROTLI_BOOL IsMatch(const uint8_t* p1, const uint8_t* p2) {
return TO_BROTLI_BOOL(
BROTLI_UNALIGNED_LOAD32(p1) == BROTLI_UNALIGNED_LOAD32(p2) &&
p1[4] == p2[4] &&
p1[5] == p2[5]);
static BROTLI_INLINE BROTLI_BOOL IsMatch(const uint8_t* p1, const uint8_t* p2,
size_t length) {
if (BrotliUnalignedRead32(p1) == BrotliUnalignedRead32(p2)) {
if (length == 4) return BROTLI_TRUE;
return TO_BROTLI_BOOL(p1[4] == p2[4] && p1[5] == p2[5]);
}
return BROTLI_FALSE;
}
/* Builds a command and distance prefix code (each 64 symbols) into "depth" and
@ -71,7 +76,7 @@ static void BuildAndStoreCommandPrefixCode(
uint16_t cmd_bits[64];
BrotliCreateHuffmanTree(histogram, 64, 15, tree, depth);
BrotliCreateHuffmanTree(&histogram[64], 64, 14, tree, &depth[64]);
/* We have to jump through a few hoopes here in order to compute
/* We have to jump through a few hoops here in order to compute
the command bits because the symbols are in a different order than in
the full alphabet. This looks complicated, but having the symbols
in this order in the command bits saves a few branches in the Emit*
@ -213,31 +218,31 @@ static BROTLI_INLINE void EmitDistance(uint32_t distance, uint32_t** commands) {
++(*commands);
}
/* REQUIRES: len <= 1 << 20. */
/* REQUIRES: len <= 1 << 24. */
static void BrotliStoreMetaBlockHeader(
size_t len, BROTLI_BOOL is_uncompressed, size_t* storage_ix,
uint8_t* storage) {
size_t nibbles = 6;
/* ISLAST */
BrotliWriteBits(1, 0, storage_ix, storage);
if (len <= (1U << 16)) {
/* MNIBBLES is 4 */
BrotliWriteBits(2, 0, storage_ix, storage);
BrotliWriteBits(16, len - 1, storage_ix, storage);
} else {
/* MNIBBLES is 5 */
BrotliWriteBits(2, 1, storage_ix, storage);
BrotliWriteBits(20, len - 1, storage_ix, storage);
nibbles = 4;
} else if (len <= (1U << 20)) {
nibbles = 5;
}
BrotliWriteBits(2, nibbles - 4, storage_ix, storage);
BrotliWriteBits(nibbles * 4, len - 1, storage_ix, storage);
/* ISUNCOMPRESSED */
BrotliWriteBits(1, (uint64_t)is_uncompressed, storage_ix, storage);
}
static void CreateCommands(const uint8_t* input, size_t block_size,
size_t input_size, const uint8_t* base_ip, int* table, size_t table_size,
static BROTLI_INLINE void CreateCommands(const uint8_t* input,
size_t block_size, size_t input_size, const uint8_t* base_ip, int* table,
size_t table_bits, size_t min_match,
uint8_t** literals, uint32_t** commands) {
/* "ip" is the input pointer. */
const uint8_t* ip = input;
const size_t shift = 64u - Log2FloorNonZero(table_size);
const size_t shift = 64u - table_bits;
const uint8_t* ip_end = input + block_size;
/* "next_emit" is a pointer to the first byte that is not covered by a
previous copy. Bytes between "next_emit" and the start of the next copy or
@ -245,27 +250,19 @@ static void CreateCommands(const uint8_t* input, size_t block_size,
const uint8_t* next_emit = input;
int last_distance = -1;
const size_t kInputMarginBytes = 16;
const size_t kMinMatchLen = 6;
const size_t kInputMarginBytes = BROTLI_WINDOW_GAP;
assert(table_size);
assert(table_size <= (1u << 31));
/* table must be power of two */
assert((table_size & (table_size - 1)) == 0);
assert(table_size - 1 ==
(size_t)(MAKE_UINT64_T(0xFFFFFFFF, 0xFFFFFF) >> shift));
if (PREDICT_TRUE(block_size >= kInputMarginBytes)) {
if (BROTLI_PREDICT_TRUE(block_size >= kInputMarginBytes)) {
/* For the last block, we need to keep a 16 bytes margin so that we can be
sure that all distances are at most window size - 16.
For all other blocks, we only need to keep a margin of 5 bytes so that
we don't go over the block size with a copy. */
const size_t len_limit = BROTLI_MIN(size_t, block_size - kMinMatchLen,
const size_t len_limit = BROTLI_MIN(size_t, block_size - min_match,
input_size - kInputMarginBytes);
const uint8_t* ip_limit = input + len_limit;
uint32_t next_hash;
for (next_hash = Hash(++ip, shift); ; ) {
for (next_hash = Hash(++ip, shift, min_match); ; ) {
/* Step 1: Scan forward in the input looking for a 6-byte-long match.
If we get close to exhausting the input then goto emit_remainder.
@ -286,34 +283,38 @@ static void CreateCommands(const uint8_t* input, size_t block_size,
const uint8_t* next_ip = ip;
const uint8_t* candidate;
assert(next_emit < ip);
BROTLI_DCHECK(next_emit < ip);
trawl:
do {
uint32_t hash = next_hash;
uint32_t bytes_between_hash_lookups = skip++ >> 5;
ip = next_ip;
assert(hash == Hash(ip, shift));
BROTLI_DCHECK(hash == Hash(ip, shift, min_match));
next_ip = ip + bytes_between_hash_lookups;
if (PREDICT_FALSE(next_ip > ip_limit)) {
if (BROTLI_PREDICT_FALSE(next_ip > ip_limit)) {
goto emit_remainder;
}
next_hash = Hash(next_ip, shift);
next_hash = Hash(next_ip, shift, min_match);
candidate = ip - last_distance;
if (IsMatch(ip, candidate)) {
if (PREDICT_TRUE(candidate < ip)) {
if (IsMatch(ip, candidate, min_match)) {
if (BROTLI_PREDICT_TRUE(candidate < ip)) {
table[hash] = (int)(ip - base_ip);
break;
}
}
candidate = base_ip + table[hash];
assert(candidate >= base_ip);
assert(candidate < ip);
BROTLI_DCHECK(candidate >= base_ip);
BROTLI_DCHECK(candidate < ip);
table[hash] = (int)(ip - base_ip);
} while (PREDICT_TRUE(!IsMatch(ip, candidate)));
} while (BROTLI_PREDICT_TRUE(!IsMatch(ip, candidate, min_match)));
/* Check copy distance. If candidate is not feasible, continue search.
Checking is done outside of hot loop to reduce overhead. */
if (ip - candidate > MAX_DISTANCE) goto trawl;
/* Step 2: Emit the found match together with the literal bytes from
"next_emit", and then see if we can find a next macth immediately
"next_emit", and then see if we can find a next match immediately
afterwards. Repeat until we find no match for the input
without emitting some literal bytes. */
@ -321,12 +322,13 @@ static void CreateCommands(const uint8_t* input, size_t block_size,
/* We have a 6-byte match at ip, and we need to emit bytes in
[next_emit, ip). */
const uint8_t* base = ip;
size_t matched = 6 + FindMatchLengthWithLimit(
candidate + 6, ip + 6, (size_t)(ip_end - ip) - 6);
size_t matched = min_match + FindMatchLengthWithLimit(
candidate + min_match, ip + min_match,
(size_t)(ip_end - ip) - min_match);
int distance = (int)(base - candidate); /* > 0 */
int insert = (int)(base - next_emit);
ip += matched;
assert(0 == memcmp(base, candidate, matched));
BROTLI_DCHECK(0 == memcmp(base, candidate, matched));
EmitInsertLen((uint32_t)insert, commands);
memcpy(*literals, next_emit, (size_t)insert);
*literals += insert;
@ -340,79 +342,107 @@ static void CreateCommands(const uint8_t* input, size_t block_size,
EmitCopyLenLastDistance(matched, commands);
next_emit = ip;
if (PREDICT_FALSE(ip >= ip_limit)) {
if (BROTLI_PREDICT_FALSE(ip >= ip_limit)) {
goto emit_remainder;
}
{
/* We could immediately start working at ip now, but to improve
compression we first update "table" with the hashes of some
positions within the last copy. */
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 5);
uint32_t prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
uint64_t input_bytes;
uint32_t cur_hash;
table[prev_hash] = (int)(ip - base_ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift);
table[prev_hash] = (int)(ip - base_ip - 4);
prev_hash = HashBytesAtOffset(input_bytes, 2, shift);
table[prev_hash] = (int)(ip - base_ip - 3);
input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 2);
cur_hash = HashBytesAtOffset(input_bytes, 2, shift);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift);
table[prev_hash] = (int)(ip - base_ip - 1);
uint32_t prev_hash;
if (min_match == 4) {
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 3);
cur_hash = HashBytesAtOffset(input_bytes, 3, shift, min_match);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 3);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 1);
} else {
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 4);
prev_hash = HashBytesAtOffset(input_bytes, 2, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 3);
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 2);
cur_hash = HashBytesAtOffset(input_bytes, 2, shift, min_match);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 1);
}
candidate = base_ip + table[cur_hash];
table[cur_hash] = (int)(ip - base_ip);
}
}
while (IsMatch(ip, candidate)) {
while (ip - candidate <= MAX_DISTANCE &&
IsMatch(ip, candidate, min_match)) {
/* We have a 6-byte match at ip, and no need to emit any
literal bytes prior to ip. */
const uint8_t* base = ip;
size_t matched = 6 + FindMatchLengthWithLimit(
candidate + 6, ip + 6, (size_t)(ip_end - ip) - 6);
size_t matched = min_match + FindMatchLengthWithLimit(
candidate + min_match, ip + min_match,
(size_t)(ip_end - ip) - min_match);
ip += matched;
last_distance = (int)(base - candidate); /* > 0 */
assert(0 == memcmp(base, candidate, matched));
BROTLI_DCHECK(0 == memcmp(base, candidate, matched));
EmitCopyLen(matched, commands);
EmitDistance((uint32_t)last_distance, commands);
next_emit = ip;
if (PREDICT_FALSE(ip >= ip_limit)) {
if (BROTLI_PREDICT_FALSE(ip >= ip_limit)) {
goto emit_remainder;
}
{
/* We could immediately start working at ip now, but to improve
compression we first update "table" with the hashes of some
positions within the last copy. */
uint64_t input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 5);
uint32_t prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
uint64_t input_bytes;
uint32_t cur_hash;
table[prev_hash] = (int)(ip - base_ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift);
table[prev_hash] = (int)(ip - base_ip - 4);
prev_hash = HashBytesAtOffset(input_bytes, 2, shift);
table[prev_hash] = (int)(ip - base_ip - 3);
input_bytes = BROTLI_UNALIGNED_LOAD64(ip - 2);
cur_hash = HashBytesAtOffset(input_bytes, 2, shift);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift);
table[prev_hash] = (int)(ip - base_ip - 1);
uint32_t prev_hash;
if (min_match == 4) {
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 3);
cur_hash = HashBytesAtOffset(input_bytes, 3, shift, min_match);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 3);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 2, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 1);
} else {
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 5);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 4);
prev_hash = HashBytesAtOffset(input_bytes, 2, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 3);
input_bytes = BROTLI_UNALIGNED_LOAD64LE(ip - 2);
cur_hash = HashBytesAtOffset(input_bytes, 2, shift, min_match);
prev_hash = HashBytesAtOffset(input_bytes, 0, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 2);
prev_hash = HashBytesAtOffset(input_bytes, 1, shift, min_match);
table[prev_hash] = (int)(ip - base_ip - 1);
}
candidate = base_ip + table[cur_hash];
table[cur_hash] = (int)(ip - base_ip);
}
}
next_hash = Hash(++ip, shift);
next_hash = Hash(++ip, shift, min_match);
}
}
emit_remainder:
assert(next_emit <= ip_end);
BROTLI_DCHECK(next_emit <= ip_end);
/* Emit the remaining bytes as literals. */
if (next_emit < ip_end) {
const uint32_t insert = (uint32_t)(ip_end - next_emit);
@ -457,7 +487,9 @@ static void StoreCommands(MemoryManager* m,
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < num_commands; ++i) {
++cmd_histo[commands[i] & 0xff];
const uint32_t code = commands[i] & 0xFF;
BROTLI_DCHECK(code < 128);
++cmd_histo[code];
}
cmd_histo[1] += 1;
cmd_histo[2] += 1;
@ -468,8 +500,9 @@ static void StoreCommands(MemoryManager* m,
for (i = 0; i < num_commands; ++i) {
const uint32_t cmd = commands[i];
const uint32_t code = cmd & 0xff;
const uint32_t code = cmd & 0xFF;
const uint32_t extra = cmd >> 8;
BROTLI_DCHECK(code < 128);
BrotliWriteBits(cmd_depths[code], cmd_bits[code], storage_ix, storage);
BrotliWriteBits(kNumExtraBits[code], extra, storage_ix, storage);
if (code < 24) {
@ -504,15 +537,32 @@ static BROTLI_BOOL ShouldCompress(
}
}
void BrotliCompressFragmentTwoPass(MemoryManager* m,
const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last,
uint32_t* command_buf, uint8_t* literal_buf,
int* table, size_t table_size,
size_t* storage_ix, uint8_t* storage) {
static void RewindBitPosition(const size_t new_storage_ix,
size_t* storage_ix, uint8_t* storage) {
const size_t bitpos = new_storage_ix & 7;
const size_t mask = (1u << bitpos) - 1;
storage[new_storage_ix >> 3] &= (uint8_t)mask;
*storage_ix = new_storage_ix;
}
static void EmitUncompressedMetaBlock(const uint8_t* input, size_t input_size,
size_t* storage_ix, uint8_t* storage) {
BrotliStoreMetaBlockHeader(input_size, 1, storage_ix, storage);
*storage_ix = (*storage_ix + 7u) & ~7u;
memcpy(&storage[*storage_ix >> 3], input, input_size);
*storage_ix += input_size << 3;
storage[*storage_ix >> 3] = 0;
}
static BROTLI_INLINE void BrotliCompressFragmentTwoPassImpl(
MemoryManager* m, const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last, uint32_t* command_buf, uint8_t* literal_buf,
int* table, size_t table_bits, size_t min_match,
size_t* storage_ix, uint8_t* storage) {
/* Save the start of the first block for position and distance computations.
*/
const uint8_t* base_ip = input;
BROTLI_UNUSED(is_last);
while (input_size > 0) {
size_t block_size =
@ -520,8 +570,8 @@ void BrotliCompressFragmentTwoPass(MemoryManager* m,
uint32_t* commands = command_buf;
uint8_t* literals = literal_buf;
size_t num_literals;
CreateCommands(input, block_size, input_size, base_ip, table, table_size,
&literals, &commands);
CreateCommands(input, block_size, input_size, base_ip, table,
table_bits, min_match, &literals, &commands);
num_literals = (size_t)(literals - literal_buf);
if (ShouldCompress(input, block_size, num_literals)) {
const size_t num_commands = (size_t)(commands - command_buf);
@ -535,15 +585,51 @@ void BrotliCompressFragmentTwoPass(MemoryManager* m,
/* Since we did not find many backward references and the entropy of
the data is close to 8 bits, we can simply emit an uncompressed block.
This makes compression speed of uncompressible data about 3x faster. */
BrotliStoreMetaBlockHeader(block_size, 1, storage_ix, storage);
*storage_ix = (*storage_ix + 7u) & ~7u;
memcpy(&storage[*storage_ix >> 3], input, block_size);
*storage_ix += block_size << 3;
storage[*storage_ix >> 3] = 0;
EmitUncompressedMetaBlock(input, block_size, storage_ix, storage);
}
input += block_size;
input_size -= block_size;
}
}
#define FOR_TABLE_BITS_(X) \
X(8) X(9) X(10) X(11) X(12) X(13) X(14) X(15) X(16) X(17)
#define BAKE_METHOD_PARAM_(B) \
static BROTLI_NOINLINE void BrotliCompressFragmentTwoPassImpl ## B( \
MemoryManager* m, const uint8_t* input, size_t input_size, \
BROTLI_BOOL is_last, uint32_t* command_buf, uint8_t* literal_buf, \
int* table, size_t* storage_ix, uint8_t* storage) { \
size_t min_match = (B <= 15) ? 4 : 6; \
BrotliCompressFragmentTwoPassImpl(m, input, input_size, is_last, command_buf,\
literal_buf, table, B, min_match, storage_ix, storage); \
}
FOR_TABLE_BITS_(BAKE_METHOD_PARAM_)
#undef BAKE_METHOD_PARAM_
void BrotliCompressFragmentTwoPass(
MemoryManager* m, const uint8_t* input, size_t input_size,
BROTLI_BOOL is_last, uint32_t* command_buf, uint8_t* literal_buf,
int* table, size_t table_size, size_t* storage_ix, uint8_t* storage) {
const size_t initial_storage_ix = *storage_ix;
const size_t table_bits = Log2FloorNonZero(table_size);
switch (table_bits) {
#define CASE_(B) \
case B: \
BrotliCompressFragmentTwoPassImpl ## B( \
m, input, input_size, is_last, command_buf, \
literal_buf, table, storage_ix, storage); \
break;
FOR_TABLE_BITS_(CASE_)
#undef CASE_
default: BROTLI_DCHECK(0); break;
}
/* If output is larger than single uncompressed block, rewrite it. */
if (*storage_ix - initial_storage_ix > 31 + (input_size << 3)) {
RewindBitPosition(initial_storage_ix, storage_ix, storage);
EmitUncompressedMetaBlock(input, input_size, storage_ix, storage);
}
if (is_last) {
BrotliWriteBits(1, 1, storage_ix, storage); /* islast */
@ -552,6 +638,8 @@ void BrotliCompressFragmentTwoPass(MemoryManager* m,
}
}
#undef FOR_TABLE_BITS_
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

9
BaseTools/Source/C/BrotliCompress/enc/compress_fragment_two_pass.h
View File

@ -13,9 +13,9 @@
#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_TWO_PASS_H_
#define BROTLI_ENC_COMPRESS_FRAGMENT_TWO_PASS_H_
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./memory.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -29,10 +29,13 @@ static const size_t kCompressFragmentTwoPassBlockSize = 1 << 17;
If "is_last" is 1, emits an additional empty last meta-block.
REQUIRES: "input_size" is greater than zero, or "is_last" is 1.
REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24).
REQUIRES: "command_buf" and "literal_buf" point to at least
kCompressFragmentTwoPassBlockSize long arrays.
REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero.
REQUIRES: "table_size" is a power of two */
REQUIRES: "table_size" is a power of two
OUTPUT: maximal copy distance <= |input_size|
OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */
BROTLI_INTERNAL void BrotliCompressFragmentTwoPass(MemoryManager* m,
const uint8_t* input,
size_t input_size,

161
BaseTools/Source/C/BrotliCompress/enc/compressor.h
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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* C++ API for Brotli compression. */
#ifndef BROTLI_ENC_COMPRESSOR_H_
#define BROTLI_ENC_COMPRESSOR_H_
#include "./encode.h"
#include "./streams.h"
namespace brotli {
static const int kMinWindowBits = kBrotliMinWindowBits;
static const int kMaxWindowBits = kBrotliMaxWindowBits;
static const int kMinInputBlockBits = kBrotliMinInputBlockBits;
static const int kMaxInputBlockBits = kBrotliMaxInputBlockBits;
struct BrotliParams {
BrotliParams(void)
: mode(MODE_GENERIC),
quality(11),
lgwin(22),
lgblock(0),
enable_dictionary(true),
enable_transforms(false),
greedy_block_split(false),
enable_context_modeling(true) {}
enum Mode {
/* Default compression mode. The compressor does not know anything in
advance about the properties of the input. */
MODE_GENERIC = 0,
/* Compression mode for UTF-8 format text input. */
MODE_TEXT = 1,
/* Compression mode used in WOFF 2.0. */
MODE_FONT = 2
};
Mode mode;
/* Controls the compression-speed vs compression-density tradeoffs. The higher
the |quality|, the slower the compression. Range is 0 to 11. */
int quality;
/* Base 2 logarithm of the sliding window size. Range is 10 to 24. */
int lgwin;
/* Base 2 logarithm of the maximum input block size. Range is 16 to 24.
If set to 0, the value will be set based on the quality. */
int lgblock;
/* These settings are deprecated and will be ignored.
All speed vs. size compromises are controlled by the |quality| param. */
bool enable_dictionary;
bool enable_transforms;
bool greedy_block_split;
bool enable_context_modeling;
};
/* An instance can not be reused for multiple brotli streams. */
class BrotliCompressor {
public:
explicit BrotliCompressor(BrotliParams params);
~BrotliCompressor(void);
/* The maximum input size that can be processed at once. */
size_t input_block_size(void) const {
return BrotliEncoderInputBlockSize(state_);
}
/* Encodes the data in |input_buffer| as a meta-block and writes it to
|encoded_buffer| (|*encoded_size should| be set to the size of
|encoded_buffer|) and sets |*encoded_size| to the number of bytes that
was written. The |input_size| must not be greater than input_block_size().
Returns false if there was an error and true otherwise. */
bool WriteMetaBlock(const size_t input_size,
const uint8_t* input_buffer,
const bool is_last,
size_t* encoded_size,
uint8_t* encoded_buffer);
/* Writes a metadata meta-block containing the given input to encoded_buffer.
|*encoded_size| should be set to the size of the encoded_buffer.
Sets |*encoded_size| to the number of bytes that was written.
Note that the given input data will not be part of the sliding window and
thus no backward references can be made to this data from subsequent
metablocks. |input_size| must not be greater than 2^24 and provided
|*encoded_size| must not be less than |input_size| + 6.
Returns false if there was an error and true otherwise. */
bool WriteMetadata(const size_t input_size,
const uint8_t* input_buffer,
const bool is_last,
size_t* encoded_size,
uint8_t* encoded_buffer);
/* Writes a zero-length meta-block with end-of-input bit set to the
internal output buffer and copies the output buffer to |encoded_buffer|
(|*encoded_size| should be set to the size of |encoded_buffer|) and sets
|*encoded_size| to the number of bytes written.
Returns false if there was an error and true otherwise. */
bool FinishStream(size_t* encoded_size, uint8_t* encoded_buffer);
/* Copies the given input data to the internal ring buffer of the compressor.
No processing of the data occurs at this time and this function can be
called multiple times before calling WriteBrotliData() to process the
accumulated input. At most input_block_size() bytes of input data can be
copied to the ring buffer, otherwise the next WriteBrotliData() will fail.
*/
void CopyInputToRingBuffer(const size_t input_size,
const uint8_t* input_buffer);
/* Processes the accumulated input data and sets |*out_size| to the length of
the new output meta-block, or to zero if no new output meta-block has been
created (in this case the processed input data is buffered internally).
If |*out_size| is positive, |*output| points to the start of the output
data. If |is_last| or |force_flush| is true, an output meta-block is always
created. However, until |is_last| is true encoder may retain up to 7 bits
of the last byte of output. To force encoder to dump the remaining bits
use WriteMetadata() to append an empty meta-data block.
Returns false if the size of the input data is larger than
input_block_size(). */
bool WriteBrotliData(const bool is_last, const bool force_flush,
size_t* out_size, uint8_t** output);
/* Fills the new state with a dictionary for LZ77, warming up the ringbuffer,
e.g. for custom static dictionaries for data formats.
Not to be confused with the built-in transformable dictionary of Brotli.
To decode, use BrotliSetCustomDictionary() of the decoder with the same
dictionary. */
void BrotliSetCustomDictionary(size_t size, const uint8_t* dict);
/* No-op, but we keep it here for API backward-compatibility. */
void WriteStreamHeader(void) {}
private:
BrotliEncoderState* state_;
};
/* Compresses the data in |input_buffer| into |encoded_buffer|, and sets
|*encoded_size| to the compressed length.
Returns 0 if there was an error and 1 otherwise. */
int BrotliCompressBuffer(BrotliParams params,
size_t input_size,
const uint8_t* input_buffer,
size_t* encoded_size,
uint8_t* encoded_buffer);
/* Same as above, but uses the specified input and output classes instead
of reading from and writing to pre-allocated memory buffers. */
int BrotliCompress(BrotliParams params, BrotliIn* in, BrotliOut* out);
/* Before compressing the data, sets a custom LZ77 dictionary with
BrotliCompressor::BrotliSetCustomDictionary. */
int BrotliCompressWithCustomDictionary(size_t dictsize, const uint8_t* dict,
BrotliParams params,
BrotliIn* in, BrotliOut* out);
} /* namespace brotli */
#endif /* BROTLI_ENC_COMPRESSOR_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Functions to map previous bytes into a context id. */
#ifndef BROTLI_ENC_CONTEXT_H_
#define BROTLI_ENC_CONTEXT_H_
#include "../common/types.h"
#include "../common/port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Second-order context lookup table for UTF8 byte streams.
If p1 and p2 are the previous two bytes, we calculate the context as
context = kUTF8ContextLookup[p1] | kUTF8ContextLookup[p2 + 256].
If the previous two bytes are ASCII characters (i.e. < 128), this will be
equivalent to
context = 4 * context1(p1) + context2(p2),
where context1 is based on the previous byte in the following way:
0 : non-ASCII control
1 : \t, \n, \r
2 : space
3 : other punctuation
4 : " '
5 : %
6 : ( < [ {
7 : ) > ] }
8 : , ; :
9 : .
10 : =
11 : number
12 : upper-case vowel
13 : upper-case consonant
14 : lower-case vowel
15 : lower-case consonant
and context2 is based on the second last byte:
0 : control, space
1 : punctuation
2 : upper-case letter, number
3 : lower-case letter
If the last byte is ASCII, and the second last byte is not (in a valid UTF8
stream it will be a continuation byte, value between 128 and 191), the
context is the same as if the second last byte was an ASCII control or space.
If the last byte is a UTF8 lead byte (value >= 192), then the next byte will
be a continuation byte and the context id is 2 or 3 depending on the LSB of
the last byte and to a lesser extent on the second last byte if it is ASCII.
If the last byte is a UTF8 continuation byte, the second last byte can be:
- continuation byte: the next byte is probably ASCII or lead byte (assuming
4-byte UTF8 characters are rare) and the context id is 0 or 1.
- lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1
- lead byte (208 - 255): next byte is continuation byte, context is 2 or 3
The possible value combinations of the previous two bytes, the range of
context ids and the type of the next byte is summarized in the table below:
|--------\-----------------------------------------------------------------|
| \ Last byte |
| Second \---------------------------------------------------------------|
| last byte \ ASCII | cont. byte | lead byte |
| \ (0-127) | (128-191) | (192-) |
|=============|===================|=====================|==================|
| ASCII | next: ASCII/lead | not valid | next: cont. |
| (0-127) | context: 4 - 63 | | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. |
| (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: ASCII/lead | not valid |
| (192-207) | | context: 0 - 1 | |
|-------------|-------------------|---------------------|------------------|
| lead byte | not valid | next: cont. | not valid |
| (208-) | | context: 2 - 3 | |
|-------------|-------------------|---------------------|------------------|
*/
static const uint8_t kUTF8ContextLookup[512] = {
/* Last byte. */
/* */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12,
44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12,
12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48,
52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12,
12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56,
60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12, 0,
/* UTF8 continuation byte range. */
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
/* UTF8 lead byte range. */
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
/* Second last byte. */
/* */
/* ASCII range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0,
/* UTF8 continuation byte range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* UTF8 lead byte range. */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
};
/* Context lookup table for small signed integers. */
static const uint8_t kSigned3BitContextLookup[] = {
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
};
typedef enum ContextType {
CONTEXT_LSB6 = 0,
CONTEXT_MSB6 = 1,
CONTEXT_UTF8 = 2,
CONTEXT_SIGNED = 3
} ContextType;
static BROTLI_INLINE uint8_t Context(uint8_t p1, uint8_t p2, ContextType mode) {
switch (mode) {
case CONTEXT_LSB6:
return p1 & 0x3f;
case CONTEXT_MSB6:
return (uint8_t)(p1 >> 2);
case CONTEXT_UTF8:
return kUTF8ContextLookup[p1] | kUTF8ContextLookup[p2 + 256];
case CONTEXT_SIGNED:
return (uint8_t)((kSigned3BitContextLookup[p1] << 3) +
kSigned3BitContextLookup[p2]);
default:
return 0;
}
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_CONTEXT_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* API for Brotli compression. */
#ifndef BROTLI_ENC_ENCODE_H_
#define BROTLI_ENC_ENCODE_H_
#include "../common/types.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static const int kBrotliMaxWindowBits = 24;
static const int kBrotliMinWindowBits = 10;
static const int kBrotliMinInputBlockBits = 16;
static const int kBrotliMaxInputBlockBits = 24;
#define BROTLI_MIN_QUALITY 0
#define BROTLI_MAX_QUALITY 11
typedef enum BrotliEncoderMode {
/* Default compression mode. The compressor does not know anything in
advance about the properties of the input. */
BROTLI_MODE_GENERIC = 0,
/* Compression mode for UTF-8 format text input. */
BROTLI_MODE_TEXT = 1,
/* Compression mode used in WOFF 2.0. */
BROTLI_MODE_FONT = 2
} BrotliEncoderMode;
#define BROTLI_DEFAULT_QUALITY 11
#define BROTLI_DEFAULT_WINDOW 22
#define BROTLI_DEFAULT_MODE BROTLI_MODE_GENERIC
typedef enum BrotliEncoderOperation {
BROTLI_OPERATION_PROCESS = 0,
/* Request output stream to flush. Performed when input stream is depleted
and there is enough space in output stream. */
BROTLI_OPERATION_FLUSH = 1,
/* Request output stream to finish. Performed when input stream is depleted
and there is enough space in output stream. */
BROTLI_OPERATION_FINISH = 2
} BrotliEncoderOperation;
typedef enum BrotliEncoderParameter {
BROTLI_PARAM_MODE = 0,
/* Controls the compression-speed vs compression-density tradeoffs. The higher
the quality, the slower the compression. Range is 0 to 11. */
BROTLI_PARAM_QUALITY = 1,
/* Base 2 logarithm of the sliding window size. Range is 10 to 24. */
BROTLI_PARAM_LGWIN = 2,
/* Base 2 logarithm of the maximum input block size. Range is 16 to 24.
If set to 0, the value will be set based on the quality. */
BROTLI_PARAM_LGBLOCK = 3
} BrotliEncoderParameter;
/* A state can not be reused for multiple brotli streams. */
typedef struct BrotliEncoderStateStruct BrotliEncoderState;
BROTLI_BOOL BrotliEncoderSetParameter(
BrotliEncoderState* state, BrotliEncoderParameter p, uint32_t value);
/* Creates the instance of BrotliEncoderState and initializes it.
|alloc_func| and |free_func| MUST be both zero or both non-zero. In the case
they are both zero, default memory allocators are used. |opaque| is passed to
|alloc_func| and |free_func| when they are called. */
BrotliEncoderState* BrotliEncoderCreateInstance(brotli_alloc_func alloc_func,
brotli_free_func free_func,
void* opaque);
/* Deinitializes and frees BrotliEncoderState instance. */
void BrotliEncoderDestroyInstance(BrotliEncoderState* state);
/* The maximum input size that can be processed at once. */
size_t BrotliEncoderInputBlockSize(BrotliEncoderState* state);
/* Encodes the data in |input_buffer| as a meta-block and writes it to
|encoded_buffer| (|*encoded_size should| be set to the size of
|encoded_buffer|) and sets |*encoded_size| to the number of bytes that
was written. The |input_size| must not be greater than input_block_size().
Returns false if there was an error and true otherwise. */
BROTLI_BOOL BrotliEncoderWriteMetaBlock(
BrotliEncoderState* state, const size_t input_size,
const uint8_t* input_buffer, const BROTLI_BOOL is_last,
size_t* encoded_size, uint8_t* encoded_buffer);
/* Writes a metadata meta-block containing the given input to encoded_buffer.
|*encoded_size| should be set to the size of the encoded_buffer.
Sets |*encoded_size| to the number of bytes that was written.
Note that the given input data will not be part of the sliding window and
thus no backward references can be made to this data from subsequent
metablocks. |input_size| must not be greater than 2^24 and provided
|*encoded_size| must not be less than |input_size| + 6.
Returns false if there was an error and true otherwise. */
BROTLI_BOOL BrotliEncoderWriteMetadata(
BrotliEncoderState* state, const size_t input_size,
const uint8_t* input_buffer, const BROTLI_BOOL is_last,
size_t* encoded_size, uint8_t* encoded_buffer);
/* Writes a zero-length meta-block with end-of-input bit set to the
internal output buffer and copies the output buffer to |encoded_buffer|
(|*encoded_size| should be set to the size of |encoded_buffer|) and sets
|*encoded_size| to the number of bytes written.
Returns false if there was an error and true otherwise. */
BROTLI_BOOL BrotliEncoderFinishStream(
BrotliEncoderState* state, size_t* encoded_size, uint8_t* encoded_buffer);
/* Copies the given input data to the internal ring buffer of the compressor.
No processing of the data occurs at this time and this function can be
called multiple times before calling WriteBrotliData() to process the
accumulated input. At most input_block_size() bytes of input data can be
copied to the ring buffer, otherwise the next WriteBrotliData() will fail.
*/
void BrotliEncoderCopyInputToRingBuffer(BrotliEncoderState* state,
const size_t input_size,
const uint8_t* input_buffer);
/* Processes the accumulated input data and sets |*out_size| to the length of
the new output meta-block, or to zero if no new output meta-block has been
created (in this case the processed input data is buffered internally).
If |*out_size| is positive, |*output| points to the start of the output
data. If |is_last| or |force_flush| is 1, an output meta-block is always
created. However, until |is_last| is 1 encoder may retain up to 7 bits
of the last byte of output. To force encoder to dump the remaining bits
use WriteMetadata() to append an empty meta-data block.
Returns false if the size of the input data is larger than
input_block_size(). */
BROTLI_BOOL BrotliEncoderWriteData(
BrotliEncoderState* state, const BROTLI_BOOL is_last,
const BROTLI_BOOL force_flush, size_t* out_size, uint8_t** output);
/* Fills the new state with a dictionary for LZ77, warming up the ringbuffer,
e.g. for custom static dictionaries for data formats.
Not to be confused with the built-in transformable dictionary of Brotli.
To decode, use BrotliSetCustomDictionary() of the decoder with the same
dictionary. */
void BrotliEncoderSetCustomDictionary(BrotliEncoderState* state, size_t size,
const uint8_t* dict);
/* Returns buffer size that is large enough to contain BrotliEncoderCompress
output for any input.
Returns 0 if result does not fit size_t. */
size_t BrotliEncoderMaxCompressedSize(size_t input_size);
/* Compresses the data in |input_buffer| into |encoded_buffer|, and sets
|*encoded_size| to the compressed length.
BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW and BROTLI_DEFAULT_MODE should
be used as |quality|, |lgwin| and |mode| if there are no specific
requirements to encoder speed and compression ratio.
If compression fails, |*encoded_size| is set to 0.
If BrotliEncoderMaxCompressedSize(|input_size|) is not zero, then
|*encoded_size| is never set to the bigger value.
Returns false if there was an error and true otherwise. */
BROTLI_BOOL BrotliEncoderCompress(
int quality, int lgwin, BrotliEncoderMode mode, size_t input_size,
const uint8_t* input_buffer, size_t* encoded_size, uint8_t* encoded_buffer);
/* Progressively compress input stream and push produced bytes to output stream.
Internally workflow consists of 3 tasks:
* (optional) copy input data to internal buffer
* actually compress data and (optionally) store it to internal buffer
* (optional) copy compressed bytes from internal buffer to output stream
Whenever all 3 tasks can't move forward anymore, or error occurs, this
method returns.
|available_in| and |next_in| represent input stream; when X bytes of input
are consumed, X is subtracted from |available_in| and added to |next_in|.
|available_out| and |next_out| represent output stream; when Y bytes are
pushed to output, Y is subtracted from |available_out| and added to
|next_out|. |total_out|, if it is not a null-pointer, is assigned to the
total amount of bytes pushed by the instance of encoder to output.
|op| is used to perform flush or finish the stream.
Flushing the stream means forcing encoding of all input passed to encoder and
completing the current output block, so it could be fully decoded by stream
decoder. To perform flush |op| must be set to BROTLI_OPERATION_FLUSH. Under
some circumstances (e.g. lack of output stream capacity) this operation would
require several calls to BrotliEncoderCompressStream. The method must be
called again until both input stream is depleted and encoder has no more
output (see BrotliEncoderHasMoreOutput) after the method is called.
Finishing the stream means encoding of all input passed to encoder and
adding specific "final" marks, so stream decoder could determine that stream
is complete. To perform finish |op| must be set to BROTLI_OPERATION_FINISH.
Under some circumstances (e.g. lack of output stream capacity) this operation
would require several calls to BrotliEncoderCompressStream. The method must
be called again until both input stream is depleted and encoder has no more
output (see BrotliEncoderHasMoreOutput) after the method is called.
WARNING: when flushing and finishing, |op| should not change until operation
is complete; input stream should not be refilled as well.
Returns false if there was an error and true otherwise.
*/
BROTLI_BOOL BrotliEncoderCompressStream(
BrotliEncoderState* s, BrotliEncoderOperation op, size_t* available_in,
const uint8_t** next_in, size_t* available_out, uint8_t** next_out,
size_t* total_out);
/* Check if encoder is in "finished" state, i.e. no more input is acceptable and
no more output will be produced.
Works only with BrotliEncoderCompressStream workflow.
Returns 1 if stream is finished and 0 otherwise. */
BROTLI_BOOL BrotliEncoderIsFinished(BrotliEncoderState* s);
/* Check if encoder has more output bytes in internal buffer.
Works only with BrotliEncoderCompressStream workflow.
Returns 1 if has more output (in internal buffer) and 0 otherwise. */
BROTLI_BOOL BrotliEncoderHasMoreOutput(BrotliEncoderState* s);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_ENCODE_H_ */

27
BaseTools/Source/C/BrotliCompress/enc/encode_parallel.h
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@ -1,27 +0,0 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* API for parallel Brotli compression
Note that this is only a proof of concept currently and not part of the
final API yet. */
#ifndef BROTLI_ENC_ENCODE_PARALLEL_H_
#define BROTLI_ENC_ENCODE_PARALLEL_H_
#include "../common/types.h"
#include "./compressor.h"
namespace brotli {
int BrotliCompressBufferParallel(BrotliParams params,
size_t input_size,
const uint8_t* input_buffer,
size_t* encoded_size,
uint8_t* encoded_buffer);
} /* namespace brotli */
#endif /* BROTLI_ENC_ENCODE_PARALLEL_H_ */

32
BaseTools/Source/C/BrotliCompress/enc/encoder_dict.c Normal file
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@ -0,0 +1,32 @@
/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#include "./encoder_dict.h"
#include "../common/dictionary.h"
#include "../common/transform.h"
#include "./dictionary_hash.h"
#include "./hash.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
void BrotliInitEncoderDictionary(BrotliEncoderDictionary* dict) {
dict->words = BrotliGetDictionary();
dict->hash_table = kStaticDictionaryHash;
dict->buckets = kStaticDictionaryBuckets;
dict->dict_words = kStaticDictionaryWords;
dict->cutoffTransformsCount = kCutoffTransformsCount;
dict->cutoffTransforms = kCutoffTransforms;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

41
BaseTools/Source/C/BrotliCompress/enc/encoder_dict.h Normal file
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@ -0,0 +1,41 @@
/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#ifndef BROTLI_ENC_ENCODER_DICT_H_
#define BROTLI_ENC_ENCODER_DICT_H_
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./static_dict_lut.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Dictionary data (words and transforms) for 1 possible context */
typedef struct BrotliEncoderDictionary {
const BrotliDictionary* words;
/* cut off for fast encoder */
uint32_t cutoffTransformsCount;
uint64_t cutoffTransforms;
/* from dictionary_hash.h, for fast encoder */
const uint16_t* hash_table;
/* from static_dict_lut.h, for slow encoder */
const uint16_t* buckets;
const DictWord* dict_words;
} BrotliEncoderDictionary;
BROTLI_INTERNAL void BrotliInitEncoderDictionary(BrotliEncoderDictionary* dict);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_ENCODER_DICT_H_ */

46
BaseTools/Source/C/BrotliCompress/enc/entropy_encode.c
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@ -11,8 +11,8 @@
#include <string.h> /* memset */
#include "../common/constants.h"
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -23,7 +23,7 @@ BROTLI_BOOL BrotliSetDepth(
int stack[16];
int level = 0;
int p = p0;
assert(max_depth <= 15);
BROTLI_DCHECK(max_depth <= 15);
stack[0] = -1;
while (BROTLI_TRUE) {
if (pool[p].index_left_ >= 0) {
@ -66,11 +66,11 @@ static BROTLI_INLINE BROTLI_BOOL SortHuffmanTree(
we are not planning to use this with extremely long blocks.
See http://en.wikipedia.org/wiki/Huffman_coding */
void BrotliCreateHuffmanTree(const uint32_t *data,
void BrotliCreateHuffmanTree(const uint32_t* data,
const size_t length,
const int tree_limit,
HuffmanTree* tree,
uint8_t *depth) {
uint8_t* depth) {
uint32_t count_limit;
HuffmanTree sentinel;
InitHuffmanTree(&sentinel, BROTLI_UINT32_MAX, -1, -1);
@ -165,7 +165,7 @@ static void BrotliWriteHuffmanTreeRepetitions(
size_t* tree_size,
uint8_t* tree,
uint8_t* extra_bits_data) {
assert(repetitions > 0);
BROTLI_DCHECK(repetitions > 0);
if (previous_value != value) {
tree[*tree_size] = value;
extra_bits_data[*tree_size] = 0;
@ -246,7 +246,7 @@ void BrotliOptimizeHuffmanCountsForRle(size_t length, uint32_t* counts,
size_t limit;
size_t sum;
const size_t streak_limit = 1240;
/* Let's make the Huffman code more compatible with rle encoding. */
/* Let's make the Huffman code more compatible with RLE encoding. */
size_t i;
for (i = 0; i < length; i++) {
if (counts[i]) {
@ -293,10 +293,10 @@ void BrotliOptimizeHuffmanCountsForRle(size_t length, uint32_t* counts,
}
}
/* 2) Let's mark all population counts that already can be encoded
with an rle code. */
with an RLE code. */
memset(good_for_rle, 0, length);
{
/* Let's not spoil any of the existing good rle codes.
/* Let's not spoil any of the existing good RLE codes.
Mark any seq of 0's that is longer as 5 as a good_for_rle.
Mark any seq of non-0's that is longer as 7 as a good_for_rle. */
uint32_t symbol = counts[0];
@ -319,7 +319,7 @@ void BrotliOptimizeHuffmanCountsForRle(size_t length, uint32_t* counts,
}
}
}
/* 3) Let's replace those population counts that lead to more rle codes.
/* 3) Let's replace those population counts that lead to more RLE codes.
Math here is in 24.8 fixed point representation. */
stride = 0;
limit = 256 * (counts[0] + counts[1] + counts[2]) / 3 + 420;
@ -371,8 +371,8 @@ void BrotliOptimizeHuffmanCountsForRle(size_t length, uint32_t* counts,
}
static void DecideOverRleUse(const uint8_t* depth, const size_t length,
BROTLI_BOOL *use_rle_for_non_zero,
BROTLI_BOOL *use_rle_for_zero) {
BROTLI_BOOL* use_rle_for_non_zero,
BROTLI_BOOL* use_rle_for_zero) {
size_t total_reps_zero = 0;
size_t total_reps_non_zero = 0;
size_t count_reps_zero = 1;
@ -420,15 +420,15 @@ void BrotliWriteHuffmanTree(const uint8_t* depth,
}
}
/* First gather statistics on if it is a good idea to do rle. */
/* First gather statistics on if it is a good idea to do RLE. */
if (length > 50) {
/* Find rle coding for longer codes.
Shorter codes seem not to benefit from rle. */
/* Find RLE coding for longer codes.
Shorter codes seem not to benefit from RLE. */
DecideOverRleUse(depth, new_length,
&use_rle_for_non_zero, &use_rle_for_zero);
}
/* Actual rle coding. */
/* Actual RLE coding. */
for (i = 0; i < new_length;) {
const uint8_t value = depth[i];
size_t reps = 1;
@ -454,26 +454,26 @@ void BrotliWriteHuffmanTree(const uint8_t* depth,
static uint16_t BrotliReverseBits(size_t num_bits, uint16_t bits) {
static const size_t kLut[16] = { /* Pre-reversed 4-bit values. */
0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf
0x00, 0x08, 0x04, 0x0C, 0x02, 0x0A, 0x06, 0x0E,
0x01, 0x09, 0x05, 0x0D, 0x03, 0x0B, 0x07, 0x0F
};
size_t retval = kLut[bits & 0xf];
size_t retval = kLut[bits & 0x0F];
size_t i;
for (i = 4; i < num_bits; i += 4) {
retval <<= 4;
bits = (uint16_t)(bits >> 4);
retval |= kLut[bits & 0xf];
retval |= kLut[bits & 0x0F];
}
retval >>= ((0 - num_bits) & 0x3);
retval >>= ((0 - num_bits) & 0x03);
return (uint16_t)retval;
}
/* 0..15 are values for bits */
#define MAX_HUFFMAN_BITS 16
void BrotliConvertBitDepthsToSymbols(const uint8_t *depth,
void BrotliConvertBitDepthsToSymbols(const uint8_t* depth,
size_t len,
uint16_t *bits) {
uint16_t* bits) {
/* In Brotli, all bit depths are [1..15]
0 bit depth means that the symbol does not exist. */
uint16_t bl_count[MAX_HUFFMAN_BITS] = { 0 };

18
BaseTools/Source/C/BrotliCompress/enc/entropy_encode.h
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@ -9,8 +9,8 @@
#ifndef BROTLI_ENC_ENTROPY_ENCODE_H_
#define BROTLI_ENC_ENTROPY_ENCODE_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -30,7 +30,7 @@ static BROTLI_INLINE void InitHuffmanTree(HuffmanTree* self, uint32_t count,
self->index_right_or_value_ = right;
}
/* Returns 1 is assignment of depths succeded, otherwise 0. */
/* Returns 1 is assignment of depths succeeded, otherwise 0. */
BROTLI_INTERNAL BROTLI_BOOL BrotliSetDepth(
int p, HuffmanTree* pool, uint8_t* depth, int max_depth);
@ -46,14 +46,14 @@ BROTLI_INTERNAL BROTLI_BOOL BrotliSetDepth(
be at least 2 * length + 1 long.
See http://en.wikipedia.org/wiki/Huffman_coding */
BROTLI_INTERNAL void BrotliCreateHuffmanTree(const uint32_t *data,
BROTLI_INTERNAL void BrotliCreateHuffmanTree(const uint32_t* data,
const size_t length,
const int tree_limit,
HuffmanTree* tree,
uint8_t *depth);
uint8_t* depth);
/* Change the population counts in a way that the consequent
Huffman tree compression, especially its rle-part will be more
Huffman tree compression, especially its RLE-part will be more
likely to compress this data more efficiently.
length contains the size of the histogram.
@ -62,7 +62,7 @@ BROTLI_INTERNAL void BrotliCreateHuffmanTree(const uint32_t *data,
BROTLI_INTERNAL void BrotliOptimizeHuffmanCountsForRle(
size_t length, uint32_t* counts, uint8_t* good_for_rle);
/* Write a Huffman tree from bit depths into the bitstream representation
/* Write a Huffman tree from bit depths into the bit-stream representation
of a Huffman tree. The generated Huffman tree is to be compressed once
more using a Huffman tree */
BROTLI_INTERNAL void BrotliWriteHuffmanTree(const uint8_t* depth,
@ -72,9 +72,9 @@ BROTLI_INTERNAL void BrotliWriteHuffmanTree(const uint8_t* depth,
uint8_t* extra_bits_data);
/* Get the actual bit values for a tree of bit depths. */
BROTLI_INTERNAL void BrotliConvertBitDepthsToSymbols(const uint8_t *depth,
BROTLI_INTERNAL void BrotliConvertBitDepthsToSymbols(const uint8_t* depth,
size_t len,
uint16_t *bits);
uint16_t* bits);
/* Input size optimized Shell sort. */
typedef BROTLI_BOOL (*HuffmanTreeComparator)(

10
BaseTools/Source/C/BrotliCompress/enc/entropy_encode_static.h
View File

@ -10,8 +10,8 @@
#define BROTLI_ENC_ENTROPY_ENCODE_STATIC_H_
#include "../common/constants.h"
#include "../common/port.h"
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./write_bits.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -83,7 +83,7 @@ static const uint32_t kCodeLengthBits[18] = {
static BROTLI_INLINE void StoreStaticCodeLengthCode(
size_t* storage_ix, uint8_t* storage) {
BrotliWriteBits(
40, MAKE_UINT64_T(0x0000ffU, 0x55555554U), storage_ix, storage);
40, BROTLI_MAKE_UINT64_T(0x0000FFu, 0x55555554u), storage_ix, storage);
}
static const uint64_t kZeroRepsBits[BROTLI_NUM_COMMAND_SYMBOLS] = {
@ -516,7 +516,7 @@ static const uint16_t kStaticCommandCodeBits[BROTLI_NUM_COMMAND_SYMBOLS] = {
static BROTLI_INLINE void StoreStaticCommandHuffmanTree(
size_t* storage_ix, uint8_t* storage) {
BrotliWriteBits(
56, MAKE_UINT64_T(0x926244U, 0x16307003U), storage_ix, storage);
56, BROTLI_MAKE_UINT64_T(0x926244U, 0x16307003U), storage_ix, storage);
BrotliWriteBits(3, 0x00000000U, storage_ix, storage);
}
@ -529,7 +529,7 @@ static const uint16_t kStaticDistanceCodeBits[64] = {
static BROTLI_INLINE void StoreStaticDistanceHuffmanTree(
size_t* storage_ix, uint8_t* storage) {
BrotliWriteBits(28, 0x0369dc03U, storage_ix, storage);
BrotliWriteBits(28, 0x0369DC03u, storage_ix, storage);
}
#if defined(__cplusplus) || defined(c_plusplus)

8
BaseTools/Source/C/BrotliCompress/enc/fast_log.h
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@ -11,15 +11,17 @@
#include <math.h>
#include "../common/types.h"
#include "../common/port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static BROTLI_INLINE uint32_t Log2FloorNonZero(size_t n) {
#ifdef __GNUC__
/* TODO: generalize and move to platform.h */
#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
return 31u ^ (uint32_t)__builtin_clz((uint32_t)n);
#else
uint32_t result = 0;

22
BaseTools/Source/C/BrotliCompress/enc/find_match_length.h
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@ -9,29 +9,29 @@
#ifndef BROTLI_ENC_FIND_MATCH_LENGTH_H_
#define BROTLI_ENC_FIND_MATCH_LENGTH_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Separate implementation for little-endian 64-bit targets, for speed. */
#if defined(__GNUC__) && defined(_LP64) && defined(IS_LITTLE_ENDIAN)
#if defined(__GNUC__) && defined(_LP64) && defined(BROTLI_LITTLE_ENDIAN)
static BROTLI_INLINE size_t FindMatchLengthWithLimit(const uint8_t* s1,
const uint8_t* s2,
size_t limit) {
size_t matched = 0;
size_t limit2 = (limit >> 3) + 1; /* + 1 is for pre-decrement in while */
while (PREDICT_TRUE(--limit2)) {
if (PREDICT_FALSE(BROTLI_UNALIGNED_LOAD64(s2) ==
BROTLI_UNALIGNED_LOAD64(s1 + matched))) {
while (BROTLI_PREDICT_TRUE(--limit2)) {
if (BROTLI_PREDICT_FALSE(BROTLI_UNALIGNED_LOAD64LE(s2) ==
BROTLI_UNALIGNED_LOAD64LE(s1 + matched))) {
s2 += 8;
matched += 8;
} else {
uint64_t x =
BROTLI_UNALIGNED_LOAD64(s2) ^ BROTLI_UNALIGNED_LOAD64(s1 + matched);
uint64_t x = BROTLI_UNALIGNED_LOAD64LE(s2) ^
BROTLI_UNALIGNED_LOAD64LE(s1 + matched);
size_t matching_bits = (size_t)__builtin_ctzll(x);
matched += matching_bits >> 3;
return matched;
@ -39,7 +39,7 @@ static BROTLI_INLINE size_t FindMatchLengthWithLimit(const uint8_t* s1,
}
limit = (limit & 7) + 1; /* + 1 is for pre-decrement in while */
while (--limit) {
if (PREDICT_TRUE(s1[matched] == *s2)) {
if (BROTLI_PREDICT_TRUE(s1[matched] == *s2)) {
++s2;
++matched;
} else {
@ -60,8 +60,8 @@ static BROTLI_INLINE size_t FindMatchLengthWithLimit(const uint8_t* s1,
the first non-matching bit and use that to calculate the total
length of the match. */
while (s2_ptr <= s2_limit - 4 &&
BROTLI_UNALIGNED_LOAD32(s2_ptr) ==
BROTLI_UNALIGNED_LOAD32(s1 + matched)) {
BrotliUnalignedRead32(s2_ptr) ==
BrotliUnalignedRead32(s1 + matched)) {
s2_ptr += 4;
matched += 4;
}

736
BaseTools/Source/C/BrotliCompress/enc/hash.h
View File

@ -14,12 +14,12 @@
#include "../common/constants.h"
#include "../common/dictionary.h"
#include "../common/types.h"
#include "./dictionary_hash.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./encoder_dict.h"
#include "./fast_log.h"
#include "./find_match_length.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#include "./static_dict.h"
@ -27,51 +27,91 @@
extern "C" {
#endif
#define MAX_TREE_SEARCH_DEPTH 64
#define MAX_TREE_COMP_LENGTH 128
/* Pointer to hasher data.
*
* Excluding initialization and destruction, hasher can be passed as
* HasherHandle by value.
*
* Typically hasher data consists of 3 sections:
* * HasherCommon structure
* * private structured hasher data, depending on hasher type
* * private dynamic hasher data, depending on hasher type and parameters
*
* Using "define" instead of "typedef", because on MSVC __restrict does not work
* on typedef pointer types. */
#define HasherHandle uint8_t*
typedef struct {
BrotliHasherParams params;
/* False if hasher needs to be "prepared" before use. */
BROTLI_BOOL is_prepared_;
size_t dict_num_lookups;
size_t dict_num_matches;
} HasherCommon;
static BROTLI_INLINE HasherCommon* GetHasherCommon(HasherHandle handle) {
return (HasherCommon*)handle;
}
#define score_t size_t
static const uint32_t kDistanceCacheIndex[] = {
0, 1, 2, 3, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
};
static const int kDistanceCacheOffset[] = {
0, 0, 0, 0, -1, 1, -2, 2, -3, 3, -1, 1, -2, 2, -3, 3
};
static const uint32_t kCutoffTransformsCount = 10;
static const uint8_t kCutoffTransforms[] = {
0, 12, 27, 23, 42, 63, 56, 48, 59, 64
};
/* 0, 12, 27, 23, 42, 63, 56, 48, 59, 64 */
/* 0+0, 4+8, 8+19, 12+11, 16+26, 20+43, 24+32, 28+20, 32+27, 36+28 */
static const uint64_t kCutoffTransforms =
BROTLI_MAKE_UINT64_T(0x071B520A, 0xDA2D3200);
typedef struct HasherSearchResult {
size_t len;
size_t len_x_code; /* == len ^ len_code */
size_t distance;
score_t score;
int len_code_delta; /* == len_code - len */
} HasherSearchResult;
typedef struct DictionarySearchStatictics {
size_t num_lookups;
size_t num_matches;
} DictionarySearchStatictics;
/* kHashMul32 multiplier has these properties:
* The multiplier must be odd. Otherwise we may lose the highest bit.
* No long streaks of 1s or 0s.
* No long streaks of ones or zeros.
* There is no effort to ensure that it is a prime, the oddity is enough
for this use.
* The number has been tuned heuristically against compression benchmarks. */
static const uint32_t kHashMul32 = 0x1e35a7bd;
static const uint32_t kHashMul32 = 0x1E35A7BD;
static const uint64_t kHashMul64 = BROTLI_MAKE_UINT64_T(0x1E35A7BD, 0x1E35A7BD);
static const uint64_t kHashMul64Long =
BROTLI_MAKE_UINT64_T(0x1FE35A7Bu, 0xD3579BD3u);
static BROTLI_INLINE uint32_t Hash14(const uint8_t* data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32(data) * kHashMul32;
uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - 14);
}
#define BROTLI_LITERAL_BYTE_SCORE 540
#define BROTLI_DISTANCE_BIT_PENALTY 120
static BROTLI_INLINE void PrepareDistanceCache(
int* BROTLI_RESTRICT distance_cache, const int num_distances) {
if (num_distances > 4) {
int last_distance = distance_cache[0];
distance_cache[4] = last_distance - 1;
distance_cache[5] = last_distance + 1;
distance_cache[6] = last_distance - 2;
distance_cache[7] = last_distance + 2;
distance_cache[8] = last_distance - 3;
distance_cache[9] = last_distance + 3;
if (num_distances > 10) {
int next_last_distance = distance_cache[1];
distance_cache[10] = next_last_distance - 1;
distance_cache[11] = next_last_distance + 1;
distance_cache[12] = next_last_distance - 2;
distance_cache[13] = next_last_distance + 2;
distance_cache[14] = next_last_distance - 3;
distance_cache[15] = next_last_distance + 3;
}
}
}
#define BROTLI_LITERAL_BYTE_SCORE 135
#define BROTLI_DISTANCE_BIT_PENALTY 30
/* Score must be positive after applying maximal penalty. */
#define BROTLI_SCORE_BASE (BROTLI_DISTANCE_BIT_PENALTY * 8 * sizeof(size_t))
@ -97,97 +137,83 @@ static BROTLI_INLINE score_t BackwardReferenceScore(
BROTLI_DISTANCE_BIT_PENALTY * Log2FloorNonZero(backward_reference_offset);
}
static const score_t kDistanceShortCodeCost[BROTLI_NUM_DISTANCE_SHORT_CODES] = {
/* Repeat last */
BROTLI_SCORE_BASE + 60,
/* 2nd, 3rd, 4th last */
BROTLI_SCORE_BASE - 95,
BROTLI_SCORE_BASE - 117,
BROTLI_SCORE_BASE - 127,
/* Last with offset */
BROTLI_SCORE_BASE - 93,
BROTLI_SCORE_BASE - 93,
BROTLI_SCORE_BASE - 96,
BROTLI_SCORE_BASE - 96,
BROTLI_SCORE_BASE - 99,
BROTLI_SCORE_BASE - 99,
/* 2nd last with offset */
BROTLI_SCORE_BASE - 105,
BROTLI_SCORE_BASE - 105,
BROTLI_SCORE_BASE - 115,
BROTLI_SCORE_BASE - 115,
BROTLI_SCORE_BASE - 125,
BROTLI_SCORE_BASE - 125
};
static BROTLI_INLINE score_t BackwardReferenceScoreUsingLastDistance(
size_t copy_length, size_t distance_short_code) {
size_t copy_length) {
return BROTLI_LITERAL_BYTE_SCORE * (score_t)copy_length +
kDistanceShortCodeCost[distance_short_code];
BROTLI_SCORE_BASE + 15;
}
static BROTLI_INLINE void DictionarySearchStaticticsReset(
DictionarySearchStatictics* self) {
self->num_lookups = 0;
self->num_matches = 0;
static BROTLI_INLINE score_t BackwardReferencePenaltyUsingLastDistance(
size_t distance_short_code) {
return (score_t)39 + ((0x1CA10 >> (distance_short_code & 0xE)) & 0xE);
}
static BROTLI_INLINE BROTLI_BOOL TestStaticDictionaryItem(
size_t item, const uint8_t* data, size_t max_length, size_t max_backward,
const BrotliEncoderDictionary* dictionary, size_t item, const uint8_t* data,
size_t max_length, size_t max_backward, size_t max_distance,
HasherSearchResult* out) {
size_t len;
size_t dist;
size_t word_idx;
size_t offset;
size_t matchlen;
size_t backward;
score_t score;
len = item & 31;
dist = item >> 5;
offset = kBrotliDictionaryOffsetsByLength[len] + len * dist;
len = item & 0x1F;
word_idx = item >> 5;
offset = dictionary->words->offsets_by_length[len] + len * word_idx;
if (len > max_length) {
return BROTLI_FALSE;
}
matchlen = FindMatchLengthWithLimit(data, &kBrotliDictionary[offset], len);
if (matchlen + kCutoffTransformsCount <= len || matchlen == 0) {
matchlen =
FindMatchLengthWithLimit(data, &dictionary->words->data[offset], len);
if (matchlen + dictionary->cutoffTransformsCount <= len || matchlen == 0) {
return BROTLI_FALSE;
}
{
size_t transform_id = kCutoffTransforms[len - matchlen];
backward = max_backward + dist + 1 +
(transform_id << kBrotliDictionarySizeBitsByLength[len]);
size_t cut = len - matchlen;
size_t transform_id = (cut << 2) +
(size_t)((dictionary->cutoffTransforms >> (cut * 6)) & 0x3F);
backward = max_backward + 1 + word_idx +
(transform_id << dictionary->words->size_bits_by_length[len]);
}
if (backward > max_distance) {
return BROTLI_FALSE;
}
score = BackwardReferenceScore(matchlen, backward);
if (score < out->score) {
return BROTLI_FALSE;
}
out->len = matchlen;
out->len_x_code = len ^ matchlen;
out->len_code_delta = (int)len - (int)matchlen;
out->distance = backward;
out->score = score;
return BROTLI_TRUE;
}
static BROTLI_INLINE BROTLI_BOOL SearchInStaticDictionary(
DictionarySearchStatictics* self, const uint8_t* data, size_t max_length,
size_t max_backward, HasherSearchResult* out, BROTLI_BOOL shallow) {
static BROTLI_INLINE void SearchInStaticDictionary(
const BrotliEncoderDictionary* dictionary,
HasherHandle handle, const uint8_t* data, size_t max_length,
size_t max_backward, size_t max_distance,
HasherSearchResult* out, BROTLI_BOOL shallow) {
size_t key;
size_t i;
BROTLI_BOOL is_match_found = BROTLI_FALSE;
if (self->num_matches < (self->num_lookups >> 7)) {
return BROTLI_FALSE;
HasherCommon* self = GetHasherCommon(handle);
if (self->dict_num_matches < (self->dict_num_lookups >> 7)) {
return;
}
key = Hash14(data) << 1;
for (i = 0; i < (shallow ? 1 : 2); ++i, ++key) {
size_t item = kStaticDictionaryHash[key];
self->num_lookups++;
if (item != 0 &&
TestStaticDictionaryItem(item, data, max_length, max_backward, out)) {
self->num_matches++;
is_match_found = BROTLI_TRUE;
for (i = 0; i < (shallow ? 1u : 2u); ++i, ++key) {
size_t item = dictionary->hash_table[key];
self->dict_num_lookups++;
if (item != 0) {
BROTLI_BOOL item_matches = TestStaticDictionaryItem(
dictionary, item, data, max_length, max_backward, max_distance, out);
if (item_matches) {
self->dict_num_matches++;
}
}
}
return is_match_found;
}
typedef struct BackwardMatch {
@ -221,320 +247,26 @@ static BROTLI_INLINE size_t BackwardMatchLengthCode(const BackwardMatch* self) {
#define CAT(a, b) a ## b
#define FN(X) EXPAND_CAT(X, HASHER())
#define MAX_NUM_MATCHES_H10 (64 + MAX_TREE_SEARCH_DEPTH)
#define HASHER() H10
#define HashToBinaryTree HASHER()
#define BUCKET_BITS 17
#define BUCKET_SIZE (1 << BUCKET_BITS)
static size_t FN(HashTypeLength)(void) { return 4; }
static size_t FN(StoreLookahead)(void) { return MAX_TREE_COMP_LENGTH; }
static uint32_t FN(HashBytes)(const uint8_t *data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - BUCKET_BITS);
}
/* A (forgetful) hash table where each hash bucket contains a binary tree of
sequences whose first 4 bytes share the same hash code.
Each sequence is MAX_TREE_COMP_LENGTH long and is identified by its starting
position in the input data. The binary tree is sorted by the lexicographic
order of the sequences, and it is also a max-heap with respect to the
starting positions. */
typedef struct HashToBinaryTree {
/* The window size minus 1 */
size_t window_mask_;
/* Hash table that maps the 4-byte hashes of the sequence to the last
position where this hash was found, which is the root of the binary
tree of sequences that share this hash bucket. */
uint32_t buckets_[BUCKET_SIZE];
/* The union of the binary trees of each hash bucket. The root of the tree
corresponding to a hash is a sequence starting at buckets_[hash] and
the left and right children of a sequence starting at pos are
forest_[2 * pos] and forest_[2 * pos + 1]. */
uint32_t* forest_;
/* A position used to mark a non-existent sequence, i.e. a tree is empty if
its root is at invalid_pos_ and a node is a leaf if both its children
are at invalid_pos_. */
uint32_t invalid_pos_;
size_t forest_size_;
BROTLI_BOOL is_dirty_;
} HashToBinaryTree;
static void FN(Reset)(HashToBinaryTree* self) {
self->is_dirty_ = BROTLI_TRUE;
}
static void FN(Initialize)(HashToBinaryTree* self) {
self->forest_ = NULL;
self->forest_size_ = 0;
FN(Reset)(self);
}
static void FN(Cleanup)(MemoryManager* m, HashToBinaryTree* self) {
BROTLI_FREE(m, self->forest_);
}
static void FN(Init)(
MemoryManager* m, HashToBinaryTree* self, const uint8_t* data,
const BrotliEncoderParams* params, size_t position, size_t bytes,
BROTLI_BOOL is_last) {
if (self->is_dirty_) {
uint32_t invalid_pos;
size_t num_nodes;
uint32_t i;
BROTLI_UNUSED(data);
self->window_mask_ = (1u << params->lgwin) - 1u;
invalid_pos = (uint32_t)(0 - self->window_mask_);
self->invalid_pos_ = invalid_pos;
for (i = 0; i < BUCKET_SIZE; i++) {
self->buckets_[i] = invalid_pos;
}
num_nodes = (position == 0 && is_last) ? bytes : self->window_mask_ + 1;
if (num_nodes > self->forest_size_) {
BROTLI_FREE(m, self->forest_);
self->forest_ = BROTLI_ALLOC(m, uint32_t, 2 * num_nodes);
if (BROTLI_IS_OOM(m)) return;
self->forest_size_ = num_nodes;
}
self->is_dirty_ = BROTLI_FALSE;
}
}
static BROTLI_INLINE size_t FN(LeftChildIndex)(HashToBinaryTree* self,
const size_t pos) {
return 2 * (pos & self->window_mask_);
}
static BROTLI_INLINE size_t FN(RightChildIndex)(HashToBinaryTree* self,
const size_t pos) {
return 2 * (pos & self->window_mask_) + 1;
}
/* Stores the hash of the next 4 bytes and in a single tree-traversal, the
hash bucket's binary tree is searched for matches and is re-rooted at the
current position.
If less than MAX_TREE_COMP_LENGTH data is available, the hash bucket of the
current position is searched for matches, but the state of the hash table
is not changed, since we can not know the final sorting order of the
current (incomplete) sequence.
This function must be called with increasing cur_ix positions. */
static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
HashToBinaryTree* self, const uint8_t* const BROTLI_RESTRICT data,
const size_t cur_ix, const size_t ring_buffer_mask, const size_t max_length,
const size_t max_backward, size_t* const BROTLI_RESTRICT best_len,
BackwardMatch* BROTLI_RESTRICT matches) {
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
const size_t max_comp_len =
BROTLI_MIN(size_t, max_length, MAX_TREE_COMP_LENGTH);
const BROTLI_BOOL should_reroot_tree =
TO_BROTLI_BOOL(max_length >= MAX_TREE_COMP_LENGTH);
const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
size_t prev_ix = self->buckets_[key];
/* The forest index of the rightmost node of the left subtree of the new
root, updated as we traverse and reroot the tree of the hash bucket. */
size_t node_left = FN(LeftChildIndex)(self, cur_ix);
/* The forest index of the leftmost node of the right subtree of the new
root, updated as we traverse and reroot the tree of the hash bucket. */
size_t node_right = FN(RightChildIndex)(self, cur_ix);
/* The match length of the rightmost node of the left subtree of the new
root, updated as we traverse and reroot the tree of the hash bucket. */
size_t best_len_left = 0;
/* The match length of the leftmost node of the right subtree of the new
root, updated as we traverse and reroot the tree of the hash bucket. */
size_t best_len_right = 0;
size_t depth_remaining;
if (should_reroot_tree) {
self->buckets_[key] = (uint32_t)cur_ix;
}
for (depth_remaining = MAX_TREE_SEARCH_DEPTH; ; --depth_remaining) {
const size_t backward = cur_ix - prev_ix;
const size_t prev_ix_masked = prev_ix & ring_buffer_mask;
if (backward == 0 || backward > max_backward || depth_remaining == 0) {
if (should_reroot_tree) {
self->forest_[node_left] = self->invalid_pos_;
self->forest_[node_right] = self->invalid_pos_;
}
break;
}
{
const size_t cur_len = BROTLI_MIN(size_t, best_len_left, best_len_right);
size_t len;
assert(cur_len <= MAX_TREE_COMP_LENGTH);
len = cur_len +
FindMatchLengthWithLimit(&data[cur_ix_masked + cur_len],
&data[prev_ix_masked + cur_len],
max_length - cur_len);
assert(0 == memcmp(&data[cur_ix_masked], &data[prev_ix_masked], len));
if (matches && len > *best_len) {
*best_len = len;
InitBackwardMatch(matches++, backward, len);
}
if (len >= max_comp_len) {
if (should_reroot_tree) {
self->forest_[node_left] =
self->forest_[FN(LeftChildIndex)(self, prev_ix)];
self->forest_[node_right] =
self->forest_[FN(RightChildIndex)(self, prev_ix)];
}
break;
}
if (data[cur_ix_masked + len] > data[prev_ix_masked + len]) {
best_len_left = len;
if (should_reroot_tree) {
self->forest_[node_left] = (uint32_t)prev_ix;
}
node_left = FN(RightChildIndex)(self, prev_ix);
prev_ix = self->forest_[node_left];
} else {
best_len_right = len;
if (should_reroot_tree) {
self->forest_[node_right] = (uint32_t)prev_ix;
}
node_right = FN(LeftChildIndex)(self, prev_ix);
prev_ix = self->forest_[node_right];
}
}
}
return matches;
}
/* Finds all backward matches of &data[cur_ix & ring_buffer_mask] up to the
length of max_length and stores the position cur_ix in the hash table.
Sets *num_matches to the number of matches found, and stores the found
matches in matches[0] to matches[*num_matches - 1]. The matches will be
sorted by strictly increasing length and (non-strictly) increasing
distance. */
static BROTLI_INLINE size_t FN(FindAllMatches)(HashToBinaryTree* self,
const uint8_t* data, const size_t ring_buffer_mask, const size_t cur_ix,
const size_t max_length, const size_t max_backward,
const BrotliEncoderParams* params, BackwardMatch* matches) {
BackwardMatch* const orig_matches = matches;
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
size_t best_len = 1;
const size_t short_match_max_backward =
params->quality != HQ_ZOPFLIFICATION_QUALITY ? 16 : 64;
size_t stop = cur_ix - short_match_max_backward;
uint32_t dict_matches[BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN + 1];
size_t i;
if (cur_ix < short_match_max_backward) { stop = 0; }
for (i = cur_ix - 1; i > stop && best_len <= 2; --i) {
size_t prev_ix = i;
const size_t backward = cur_ix - prev_ix;
if (PREDICT_FALSE(backward > max_backward)) {
break;
}
prev_ix &= ring_buffer_mask;
if (data[cur_ix_masked] != data[prev_ix] ||
data[cur_ix_masked + 1] != data[prev_ix + 1]) {
continue;
}
{
const size_t len =
FindMatchLengthWithLimit(&data[prev_ix], &data[cur_ix_masked],
max_length);
if (len > best_len) {
best_len = len;
InitBackwardMatch(matches++, backward, len);
}
}
}
if (best_len < max_length) {
matches = FN(StoreAndFindMatches)(self, data, cur_ix, ring_buffer_mask,
max_length, max_backward, &best_len, matches);
}
for (i = 0; i <= BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN; ++i) {
dict_matches[i] = kInvalidMatch;
}
{
size_t minlen = BROTLI_MAX(size_t, 4, best_len + 1);
if (BrotliFindAllStaticDictionaryMatches(&data[cur_ix_masked], minlen,
max_length, &dict_matches[0])) {
size_t maxlen = BROTLI_MIN(
size_t, BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN, max_length);
size_t l;
for (l = minlen; l <= maxlen; ++l) {
uint32_t dict_id = dict_matches[l];
if (dict_id < kInvalidMatch) {
InitDictionaryBackwardMatch(matches++,
max_backward + (dict_id >> 5) + 1, l, dict_id & 31);
}
}
}
}
return (size_t)(matches - orig_matches);
}
/* Stores the hash of the next 4 bytes and re-roots the binary tree at the
current sequence, without returning any matches.
REQUIRES: ix + MAX_TREE_COMP_LENGTH <= end-of-current-block */
static BROTLI_INLINE void FN(Store)(HashToBinaryTree* self, const uint8_t *data,
const size_t mask, const size_t ix) {
/* Maximum distance is window size - 16, see section 9.1. of the spec. */
const size_t max_backward = self->window_mask_ - 15;
FN(StoreAndFindMatches)(self, data, ix, mask, MAX_TREE_COMP_LENGTH,
max_backward, NULL, NULL);
}
static BROTLI_INLINE void FN(StoreRange)(HashToBinaryTree* self,
const uint8_t *data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i = ix_start + 63 <= ix_end ? ix_end - 63 : ix_start;
for (; i < ix_end; ++i) {
FN(Store)(self, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HashToBinaryTree* self,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 &&
position >= MAX_TREE_COMP_LENGTH) {
/* Store the last `MAX_TREE_COMP_LENGTH - 1` positions in the hasher.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
const size_t i_start = position - MAX_TREE_COMP_LENGTH + 1;
const size_t i_end = BROTLI_MIN(size_t, position, i_start + num_bytes);
size_t i;
for (i = i_start; i < i_end; ++i) {
/* Maximum distance is window size - 16, see section 9.1. of the spec.
Furthermore, we have to make sure that we don't look further back
from the start of the next block than the window size, otherwise we
could access already overwritten areas of the ringbuffer. */
const size_t max_backward =
self->window_mask_ - BROTLI_MAX(size_t, 15, position - i);
/* We know that i + MAX_TREE_COMP_LENGTH <= position + num_bytes, i.e. the
end of the current block and that we have at least
MAX_TREE_COMP_LENGTH tail in the ringbuffer. */
FN(StoreAndFindMatches)(self, ringbuffer, i, ringbuffer_mask,
MAX_TREE_COMP_LENGTH, max_backward, NULL, NULL);
}
}
}
#undef BUCKET_SIZE
#define MAX_TREE_SEARCH_DEPTH 64
#define MAX_TREE_COMP_LENGTH 128
#include "./hash_to_binary_tree_inc.h" /* NOLINT(build/include) */
#undef MAX_TREE_SEARCH_DEPTH
#undef MAX_TREE_COMP_LENGTH
#undef BUCKET_BITS
#undef HASHER
/* MAX_NUM_MATCHES == 64 + MAX_TREE_SEARCH_DEPTH */
#define MAX_NUM_MATCHES_H10 128
/* For BUCKET_SWEEP == 1, enabling the dictionary lookup makes compression
a little faster (0.5% - 1%) and it compresses 0.15% better on small text
and html inputs. */
and HTML inputs. */
#define HASHER() H2
#define BUCKET_BITS 16
#define BUCKET_SWEEP 1
#define HASH_LEN 5
#define USE_DICTIONARY 1
#include "./hash_longest_match_quickly_inc.h" /* NOLINT(build/include) */
#undef BUCKET_SWEEP
@ -556,48 +288,17 @@ static BROTLI_INLINE void FN(StitchToPreviousBlock)(HashToBinaryTree* self,
#define USE_DICTIONARY 1
#include "./hash_longest_match_quickly_inc.h" /* NOLINT(build/include) */
#undef USE_DICTIONARY
#undef HASH_LEN
#undef BUCKET_SWEEP
#undef BUCKET_BITS
#undef HASHER
#define HASHER() H5
#define BUCKET_BITS 14
#define BLOCK_BITS 4
#define NUM_LAST_DISTANCES_TO_CHECK 4
#include "./hash_longest_match_inc.h" /* NOLINT(build/include) */
#undef BLOCK_BITS
#undef HASHER
#define HASHER() H6
#define BLOCK_BITS 5
#include "./hash_longest_match_inc.h" /* NOLINT(build/include) */
#undef NUM_LAST_DISTANCES_TO_CHECK
#undef BLOCK_BITS
#undef BUCKET_BITS
#undef HASHER
#define HASHER() H7
#define BUCKET_BITS 15
#define BLOCK_BITS 6
#define NUM_LAST_DISTANCES_TO_CHECK 10
#include "./hash_longest_match_inc.h" /* NOLINT(build/include) */
#undef BLOCK_BITS
#undef HASHER
#define HASHER() H8
#define BLOCK_BITS 7
#include "./hash_longest_match_inc.h" /* NOLINT(build/include) */
#undef NUM_LAST_DISTANCES_TO_CHECK
#undef BLOCK_BITS
#undef HASHER
#define HASHER() H9
#define BLOCK_BITS 8
#define NUM_LAST_DISTANCES_TO_CHECK 16
#include "./hash_longest_match_inc.h" /* NOLINT(build/include) */
#undef NUM_LAST_DISTANCES_TO_CHECK
#undef BLOCK_BITS
#undef BUCKET_BITS
#include "./hash_longest_match64_inc.h" /* NOLINT(build/include) */
#undef HASHER
#define BUCKET_BITS 15
@ -630,86 +331,165 @@ static BROTLI_INLINE void FN(StitchToPreviousBlock)(HashToBinaryTree* self,
#undef BUCKET_BITS
#define HASHER() H54
#define BUCKET_BITS 20
#define BUCKET_SWEEP 4
#define HASH_LEN 7
#define USE_DICTIONARY 0
#include "./hash_longest_match_quickly_inc.h" /* NOLINT(build/include) */
#undef USE_DICTIONARY
#undef HASH_LEN
#undef BUCKET_SWEEP
#undef BUCKET_BITS
#undef HASHER
/* fast large window hashers */
#define HASHER() HROLLING_FAST
#define CHUNKLEN 32
#define JUMP 4
#define NUMBUCKETS 16777216
#define MASK ((NUMBUCKETS * 64) - 1)
#include "./hash_rolling_inc.h" /* NOLINT(build/include) */
#undef JUMP
#undef HASHER
#define HASHER() HROLLING
#define JUMP 1
#include "./hash_rolling_inc.h" /* NOLINT(build/include) */
#undef MASK
#undef NUMBUCKETS
#undef JUMP
#undef CHUNKLEN
#undef HASHER
#define HASHER() H35
#define HASHER_A H3
#define HASHER_B HROLLING_FAST
#include "./hash_composite_inc.h" /* NOLINT(build/include) */
#undef HASHER_A
#undef HASHER_B
#undef HASHER
#define HASHER() H55
#define HASHER_A H54
#define HASHER_B HROLLING_FAST
#include "./hash_composite_inc.h" /* NOLINT(build/include) */
#undef HASHER_A
#undef HASHER_B
#undef HASHER
#define HASHER() H65
#define HASHER_A H6
#define HASHER_B HROLLING
#include "./hash_composite_inc.h" /* NOLINT(build/include) */
#undef HASHER_A
#undef HASHER_B
#undef HASHER
#undef FN
#undef CAT
#undef EXPAND_CAT
#define FOR_GENERIC_HASHERS(H) H(2) H(3) H(4) H(5) H(6) H(7) H(8) H(9) \
H(40) H(41) H(42)
#define FOR_GENERIC_HASHERS(H) H(2) H(3) H(4) H(5) H(6) H(40) H(41) H(42) H(54)\
H(35) H(55) H(65)
#define FOR_ALL_HASHERS(H) FOR_GENERIC_HASHERS(H) H(10)
typedef struct Hashers {
#define _MEMBER(N) H ## N* h ## N;
FOR_ALL_HASHERS(_MEMBER)
#undef _MEMBER
} Hashers;
static BROTLI_INLINE void InitHashers(Hashers* self) {
#define _INIT(N) self->h ## N = 0;
FOR_ALL_HASHERS(_INIT)
#undef _INIT
static BROTLI_INLINE void DestroyHasher(
MemoryManager* m, HasherHandle* handle) {
if (*handle == NULL) return;
BROTLI_FREE(m, *handle);
}
static BROTLI_INLINE void DestroyHashers(MemoryManager* m, Hashers* self) {
if (self->h10) CleanupH10(m, self->h10);
#define _CLEANUP(N) BROTLI_FREE(m, self->h ## N)
FOR_ALL_HASHERS(_CLEANUP)
#undef _CLEANUP
static BROTLI_INLINE void HasherReset(HasherHandle handle) {
if (handle == NULL) return;
GetHasherCommon(handle)->is_prepared_ = BROTLI_FALSE;
}
static BROTLI_INLINE void HashersReset(Hashers* self, int type) {
switch (type) {
#define _RESET(N) case N: ResetH ## N(self->h ## N); break;
FOR_ALL_HASHERS(_RESET)
#undef _RESET
default: break;
static BROTLI_INLINE size_t HasherSize(const BrotliEncoderParams* params,
BROTLI_BOOL one_shot, const size_t input_size) {
size_t result = sizeof(HasherCommon);
switch (params->hasher.type) {
#define SIZE_(N) \
case N: \
result += HashMemAllocInBytesH ## N(params, one_shot, input_size); \
break;
FOR_ALL_HASHERS(SIZE_)
#undef SIZE_
default:
break;
}
return result;
}
static BROTLI_INLINE void HasherSetup(MemoryManager* m, HasherHandle* handle,
BrotliEncoderParams* params, const uint8_t* data, size_t position,
size_t input_size, BROTLI_BOOL is_last) {
HasherHandle self = NULL;
HasherCommon* common = NULL;
BROTLI_BOOL one_shot = (position == 0 && is_last);
if (*handle == NULL) {
size_t alloc_size;
ChooseHasher(params, &params->hasher);
alloc_size = HasherSize(params, one_shot, input_size);
self = BROTLI_ALLOC(m, uint8_t, alloc_size);
if (BROTLI_IS_OOM(m)) return;
*handle = self;
common = GetHasherCommon(self);
common->params = params->hasher;
switch (common->params.type) {
#define INITIALIZE_(N) \
case N: \
InitializeH ## N(*handle, params); \
break;
FOR_ALL_HASHERS(INITIALIZE_);
#undef INITIALIZE_
default:
break;
}
HasherReset(*handle);
}
self = *handle;
common = GetHasherCommon(self);
if (!common->is_prepared_) {
switch (common->params.type) {
#define PREPARE_(N) \
case N: \
PrepareH ## N(self, one_shot, input_size, data); \
break;
FOR_ALL_HASHERS(PREPARE_)
#undef PREPARE_
default: break;
}
if (position == 0) {
common->dict_num_lookups = 0;
common->dict_num_matches = 0;
}
common->is_prepared_ = BROTLI_TRUE;
}
}
static BROTLI_INLINE void HashersSetup(
MemoryManager* m, Hashers* self, int type) {
switch (type) {
#define _SETUP(N) case N: self->h ## N = BROTLI_ALLOC(m, H ## N, 1); break;
FOR_ALL_HASHERS(_SETUP)
#undef _SETUP
default: break;
}
static BROTLI_INLINE void InitOrStitchToPreviousBlock(
MemoryManager* m, HasherHandle* handle, const uint8_t* data, size_t mask,
BrotliEncoderParams* params, size_t position, size_t input_size,
BROTLI_BOOL is_last) {
HasherHandle self;
HasherSetup(m, handle, params, data, position, input_size, is_last);
if (BROTLI_IS_OOM(m)) return;
if (type == 10) InitializeH10(self->h10);
HashersReset(self, type);
}
#define _WARMUP_HASH(N) \
static BROTLI_INLINE void WarmupHashH ## N(MemoryManager* m, \
const BrotliEncoderParams* params, const size_t size, const uint8_t* dict, \
H ## N* hasher) { \
size_t overlap = (StoreLookaheadH ## N()) - 1; \
size_t i; \
InitH ## N(m, hasher, dict, params, 0, size, BROTLI_FALSE); \
if (BROTLI_IS_OOM(m)) return; \
for (i = 0; i + overlap < size; i++) { \
StoreH ## N(hasher, dict, ~(size_t)0, i); \
} \
}
FOR_ALL_HASHERS(_WARMUP_HASH)
#undef _WARMUP_HASH
/* Custom LZ77 window. */
static BROTLI_INLINE void HashersPrependCustomDictionary(
MemoryManager* m, Hashers* self, const BrotliEncoderParams* params,
const size_t size, const uint8_t* dict) {
int hasher_type = ChooseHasher(params);
switch (hasher_type) {
#define _PREPEND(N) \
case N: WarmupHashH ## N(m, params, size, dict, self->h ## N); break;
FOR_ALL_HASHERS(_PREPEND)
#undef _PREPEND
self = *handle;
switch (GetHasherCommon(self)->params.type) {
#define INIT_(N) \
case N: \
StitchToPreviousBlockH ## N(self, input_size, position, data, mask); \
break;
FOR_ALL_HASHERS(INIT_)
#undef INIT_
default: break;
}
if (BROTLI_IS_OOM(m)) return;
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

133
BaseTools/Source/C/BrotliCompress/enc/hash_composite_inc.h Normal file
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@ -0,0 +1,133 @@
/* NOLINT(build/header_guard) */
/* Copyright 2018 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN, HASHER_A, HASHER_B */
/* Composite hasher: This hasher allows to combine two other hashers, HASHER_A
and HASHER_B. */
#define HashComposite HASHER()
#define FN_A(X) EXPAND_CAT(X, HASHER_A)
#define FN_B(X) EXPAND_CAT(X, HASHER_B)
static BROTLI_INLINE size_t FN(HashTypeLength)(void) {
size_t a = FN_A(HashTypeLength)();
size_t b = FN_B(HashTypeLength)();
return a > b ? a : b;
}
static BROTLI_INLINE size_t FN(StoreLookahead)(void) {
size_t a = FN_A(StoreLookahead)();
size_t b = FN_B(StoreLookahead)();
return a > b ? a : b;
}
typedef struct HashComposite {
HasherHandle ha;
HasherHandle hb;
const BrotliEncoderParams* params;
} HashComposite;
static BROTLI_INLINE HashComposite* FN(Self)(HasherHandle handle) {
return (HashComposite*)&(GetHasherCommon(handle)[1]);
}
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
HashComposite* self = FN(Self)(handle);
self->ha = 0;
self->hb = 0;
self->params = params;
/* TODO: Initialize of the hashers is defered to Prepare (and params
remembered here) because we don't get the one_shot and input_size params
here that are needed to know the memory size of them. Instead provide
those params to all hashers FN(Initialize) */
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashComposite* self = FN(Self)(handle);
if (!self->ha) {
HasherCommon* common_a;
HasherCommon* common_b;
self->ha = handle + sizeof(HasherCommon) + sizeof(HashComposite);
common_a = (HasherCommon*)self->ha;
common_a->params = self->params->hasher;
common_a->is_prepared_ = BROTLI_FALSE;
common_a->dict_num_lookups = 0;
common_a->dict_num_matches = 0;
FN_A(Initialize)(self->ha, self->params);
self->hb = self->ha + sizeof(HasherCommon) + FN_A(HashMemAllocInBytes)(
self->params, one_shot, input_size);
common_b = (HasherCommon*)self->hb;
common_b->params = self->params->hasher;
common_b->is_prepared_ = BROTLI_FALSE;
common_b->dict_num_lookups = 0;
common_b->dict_num_matches = 0;
FN_B(Initialize)(self->hb, self->params);
}
FN_A(Prepare)(self->ha, one_shot, input_size, data);
FN_B(Prepare)(self->hb, one_shot, input_size, data);
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
return sizeof(HashComposite) + 2 * sizeof(HasherCommon) +
FN_A(HashMemAllocInBytes)(params, one_shot, input_size) +
FN_B(HashMemAllocInBytes)(params, one_shot, input_size);
}
static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
HashComposite* self = FN(Self)(handle);
FN_A(Store)(self->ha, data, mask, ix);
FN_B(Store)(self->hb, data, mask, ix);
}
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
HashComposite* self = FN(Self)(handle);
FN_A(StoreRange)(self->ha, data, mask, ix_start, ix_end);
FN_B(StoreRange)(self->hb, data, mask, ix_start, ix_end);
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ring_buffer_mask) {
HashComposite* self = FN(Self)(handle);
FN_A(StitchToPreviousBlock)(self->ha, num_bytes, position, ringbuffer,
ring_buffer_mask);
FN_B(StitchToPreviousBlock)(self->hb, num_bytes, position, ringbuffer,
ring_buffer_mask);
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
HashComposite* self = FN(Self)(handle);
FN_A(PrepareDistanceCache)(self->ha, distance_cache);
FN_B(PrepareDistanceCache)(self->hb, distance_cache);
}
static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
const size_t max_length, const size_t max_backward, const size_t gap,
const size_t max_distance, HasherSearchResult* BROTLI_RESTRICT out) {
HashComposite* self = FN(Self)(handle);
FN_A(FindLongestMatch)(self->ha, dictionary, data, ring_buffer_mask,
distance_cache, cur_ix, max_length, max_backward, gap, max_distance, out);
FN_B(FindLongestMatch)(self->hb, dictionary, data, ring_buffer_mask,
distance_cache, cur_ix, max_length, max_backward, gap, max_distance, out);
}
#undef HashComposite

145
BaseTools/Source/C/BrotliCompress/enc/hash_forgetful_chain_inc.h
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@ -28,8 +28,8 @@ static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
/* HashBytes is the function that chooses the bucket to place the address in.*/
static BROTLI_INLINE size_t FN(HashBytes)(const uint8_t *data) {
const uint32_t h = BROTLI_UNALIGNED_LOAD32(data) * kHashMul32;
static BROTLI_INLINE size_t FN(HashBytes)(const uint8_t* data) {
const uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - BUCKET_BITS);
@ -51,65 +51,57 @@ typedef struct HashForgetfulChain {
uint8_t tiny_hash[65536];
FN(Bank) banks[NUM_BANKS];
uint16_t free_slot_idx[NUM_BANKS];
BROTLI_BOOL is_dirty_;
DictionarySearchStatictics dict_search_stats_;
size_t max_hops;
} HashForgetfulChain;
static void FN(Reset)(HashForgetfulChain* self) {
self->is_dirty_ = BROTLI_TRUE;
DictionarySearchStaticticsReset(&self->dict_search_stats_);
static BROTLI_INLINE HashForgetfulChain* FN(Self)(HasherHandle handle) {
return (HashForgetfulChain*)&(GetHasherCommon(handle)[1]);
}
static void FN(InitEmpty)(HashForgetfulChain* self) {
if (self->is_dirty_) {
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
FN(Self)(handle)->max_hops =
(params->quality > 6 ? 7u : 8u) << (params->quality - 4);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashForgetfulChain* self = FN(Self)(handle);
/* Partial preparation is 100 times slower (per socket). */
size_t partial_prepare_threshold = BUCKET_SIZE >> 6;
if (one_shot && input_size <= partial_prepare_threshold) {
size_t i;
for (i = 0; i < input_size; ++i) {
size_t bucket = FN(HashBytes)(&data[i]);
/* See InitEmpty comment. */
self->addr[bucket] = 0xCCCCCCCC;
self->head[bucket] = 0xCCCC;
}
} else {
/* Fill |addr| array with 0xCCCCCCCC value. Because of wrapping, position
processed by hasher never reaches 3GB + 64M; this makes all new chains
to be terminated after the first node. */
memset(self->addr, 0xCC, sizeof(self->addr));
memset(self->head, 0, sizeof(self->head));
memset(self->tiny_hash, 0, sizeof(self->tiny_hash));
memset(self->free_slot_idx, 0, sizeof(self->free_slot_idx));
self->is_dirty_ = BROTLI_FALSE;
}
}
static void FN(InitForData)(HashForgetfulChain* self, const uint8_t* data,
size_t num) {
size_t i;
for (i = 0; i < num; ++i) {
size_t bucket = FN(HashBytes)(&data[i]);
/* See InitEmpty comment. */
self->addr[bucket] = 0xCCCCCCCC;
self->head[bucket] = 0xCCCC;
}
memset(self->tiny_hash, 0, sizeof(self->tiny_hash));
memset(self->free_slot_idx, 0, sizeof(self->free_slot_idx));
if (num != 0) {
self->is_dirty_ = BROTLI_FALSE;
}
}
static void FN(Init)(
MemoryManager* m, HashForgetfulChain* self, const uint8_t* data,
const BrotliEncoderParams* params, size_t position, size_t bytes,
BROTLI_BOOL is_last) {
/* Choose which init method is faster.
Init() is about 100 times faster than InitForData(). */
const size_t kMaxBytesForPartialHashInit = BUCKET_SIZE >> 6;
BROTLI_UNUSED(m);
self->max_hops = (params->quality > 6 ? 7u : 8u) << (params->quality - 4);
if (position == 0 && is_last && bytes <= kMaxBytesForPartialHashInit) {
FN(InitForData)(self, data, bytes);
} else {
FN(InitEmpty)(self);
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
BROTLI_UNUSED(params);
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
return sizeof(HashForgetfulChain);
}
/* Look at 4 bytes at &data[ix & mask]. Compute a hash from these, and prepend
node to corresponding chain; also update tiny_hash for current position. */
static BROTLI_INLINE void FN(Store)(HashForgetfulChain* BROTLI_RESTRICT self,
static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
HashForgetfulChain* self = FN(Self)(handle);
const size_t key = FN(HashBytes)(&data[ix & mask]);
const size_t bank = key & (NUM_BANKS - 1);
const size_t idx = self->free_slot_idx[bank]++ & (BANK_SIZE - 1);
@ -122,56 +114,68 @@ static BROTLI_INLINE void FN(Store)(HashForgetfulChain* BROTLI_RESTRICT self,
self->head[key] = (uint16_t)idx;
}
static BROTLI_INLINE void FN(StoreRange)(HashForgetfulChain* self,
const uint8_t *data, const size_t mask, const size_t ix_start,
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i;
for (i = ix_start; i < ix_end; ++i) {
FN(Store)(self, data, mask, i);
FN(Store)(handle, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HashForgetfulChain* self,
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ring_buffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
/* Prepare the hashes for three last bytes of the last write.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
FN(Store)(self, ringbuffer, ring_buffer_mask, position - 3);
FN(Store)(self, ringbuffer, ring_buffer_mask, position - 2);
FN(Store)(self, ringbuffer, ring_buffer_mask, position - 1);
FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 3);
FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 2);
FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 1);
}
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
BROTLI_UNUSED(handle);
PrepareDistanceCache(distance_cache, NUM_LAST_DISTANCES_TO_CHECK);
}
/* Find a longest backward match of &data[cur_ix] up to the length of
max_length and stores the position cur_ix in the hash table.
REQUIRES: FN(PrepareDistanceCache) must be invoked for current distance cache
values; if this method is invoked repeatedly with the same distance
cache values, it is enough to invoke FN(PrepareDistanceCache) once.
Does not look for matches longer than max_length.
Does not look for matches further away than max_backward.
Writes the best match into |out|.
Returns 1 when match is found, otherwise 0. */
static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
HashForgetfulChain* self, const uint8_t* BROTLI_RESTRICT data,
const size_t ring_buffer_mask, const int* BROTLI_RESTRICT distance_cache,
|out|->score is updated only if a better match is found. */
static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache,
const size_t cur_ix, const size_t max_length, const size_t max_backward,
const size_t gap, const size_t max_distance,
HasherSearchResult* BROTLI_RESTRICT out) {
HashForgetfulChain* self = FN(Self)(handle);
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
BROTLI_BOOL is_match_found = BROTLI_FALSE;
/* Don't accept a short copy from far away. */
score_t min_score = out->score;
score_t best_score = out->score;
size_t best_len = out->len;
size_t i;
const size_t key = FN(HashBytes)(&data[cur_ix_masked]);
const uint8_t tiny_hash = (uint8_t)(key);
out->len = 0;
out->len_x_code = 0;
out->len_code_delta = 0;
/* Try last distance first. */
for (i = 0; i < NUM_LAST_DISTANCES_TO_CHECK; ++i) {
const size_t idx = kDistanceCacheIndex[i];
const size_t backward =
(size_t)(distance_cache[idx] + kDistanceCacheOffset[i]);
const size_t backward = (size_t)distance_cache[i];
size_t prev_ix = (cur_ix - backward);
/* For distance code 0 we want to consider 2-byte matches. */
if (i > 0 && self->tiny_hash[(uint16_t)prev_ix] != tiny_hash) continue;
if (prev_ix >= cur_ix || backward > max_backward) {
continue;
@ -182,14 +186,16 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
&data[cur_ix_masked],
max_length);
if (len >= 2) {
score_t score = BackwardReferenceScoreUsingLastDistance(len, i);
score_t score = BackwardReferenceScoreUsingLastDistance(len);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
is_match_found = BROTLI_TRUE;
if (i != 0) score -= BackwardReferencePenaltyUsingLastDistance(i);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
}
}
}
}
@ -228,18 +234,17 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
out->len = best_len;
out->distance = backward;
out->score = best_score;
is_match_found = BROTLI_TRUE;
}
}
}
}
FN(Store)(self, data, ring_buffer_mask, cur_ix);
FN(Store)(handle, data, ring_buffer_mask, cur_ix);
}
if (!is_match_found) {
is_match_found = SearchInStaticDictionary(&self->dict_search_stats_,
&data[cur_ix_masked], max_length, max_backward, out, BROTLI_FALSE);
if (out->score == min_score) {
SearchInStaticDictionary(dictionary,
handle, &data[cur_ix_masked], max_length, max_backward + gap,
max_distance, out, BROTLI_FALSE);
}
return is_match_found;
}
#undef BANK_SIZE

266
BaseTools/Source/C/BrotliCompress/enc/hash_longest_match64_inc.h Normal file
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@ -0,0 +1,266 @@
/* NOLINT(build/header_guard) */
/* Copyright 2010 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN */
/* A (forgetful) hash table to the data seen by the compressor, to
help create backward references to previous data.
This is a hash map of fixed size (bucket_size_) to a ring buffer of
fixed size (block_size_). The ring buffer contains the last block_size_
index positions of the given hash key in the compressed data. */
#define HashLongestMatch HASHER()
static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 8; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 8; }
/* HashBytes is the function that chooses the bucket to place the address in. */
static BROTLI_INLINE uint32_t FN(HashBytes)(const uint8_t* data,
const uint64_t mask,
const int shift) {
const uint64_t h = (BROTLI_UNALIGNED_LOAD64LE(data) & mask) * kHashMul64Long;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return (uint32_t)(h >> shift);
}
typedef struct HashLongestMatch {
/* Number of hash buckets. */
size_t bucket_size_;
/* Only block_size_ newest backward references are kept,
and the older are forgotten. */
size_t block_size_;
/* Left-shift for computing hash bucket index from hash value. */
int hash_shift_;
/* Mask for selecting the next 4-8 bytes of input */
uint64_t hash_mask_;
/* Mask for accessing entries in a block (in a ring-buffer manner). */
uint32_t block_mask_;
/* --- Dynamic size members --- */
/* Number of entries in a particular bucket. */
/* uint16_t num[bucket_size]; */
/* Buckets containing block_size_ of backward references. */
/* uint32_t* buckets[bucket_size * block_size]; */
} HashLongestMatch;
static BROTLI_INLINE HashLongestMatch* FN(Self)(HasherHandle handle) {
return (HashLongestMatch*)&(GetHasherCommon(handle)[1]);
}
static BROTLI_INLINE uint16_t* FN(Num)(HashLongestMatch* self) {
return (uint16_t*)(&self[1]);
}
static BROTLI_INLINE uint32_t* FN(Buckets)(HashLongestMatch* self) {
return (uint32_t*)(&FN(Num)(self)[self->bucket_size_]);
}
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
HasherCommon* common = GetHasherCommon(handle);
HashLongestMatch* self = FN(Self)(handle);
BROTLI_UNUSED(params);
self->hash_shift_ = 64 - common->params.bucket_bits;
self->hash_mask_ = (~((uint64_t)0U)) >> (64 - 8 * common->params.hash_len);
self->bucket_size_ = (size_t)1 << common->params.bucket_bits;
self->block_size_ = (size_t)1 << common->params.block_bits;
self->block_mask_ = (uint32_t)(self->block_size_ - 1);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
/* Partial preparation is 100 times slower (per socket). */
size_t partial_prepare_threshold = self->bucket_size_ >> 6;
if (one_shot && input_size <= partial_prepare_threshold) {
size_t i;
for (i = 0; i < input_size; ++i) {
const uint32_t key = FN(HashBytes)(&data[i], self->hash_mask_,
self->hash_shift_);
num[key] = 0;
}
} else {
memset(num, 0, self->bucket_size_ * sizeof(num[0]));
}
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
size_t bucket_size = (size_t)1 << params->hasher.bucket_bits;
size_t block_size = (size_t)1 << params->hasher.block_bits;
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
return sizeof(HashLongestMatch) + bucket_size * (2 + 4 * block_size);
}
/* Look at 4 bytes at &data[ix & mask].
Compute a hash from these, and store the value of ix at that position. */
static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
const size_t mask, const size_t ix) {
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
const uint32_t key = FN(HashBytes)(&data[ix & mask], self->hash_mask_,
self->hash_shift_);
const size_t minor_ix = num[key] & self->block_mask_;
const size_t offset =
minor_ix + (key << GetHasherCommon(handle)->params.block_bits);
FN(Buckets)(self)[offset] = (uint32_t)ix;
++num[key];
}
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i;
for (i = ix_start; i < ix_end; ++i) {
FN(Store)(handle, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
/* Prepare the hashes for three last bytes of the last write.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
}
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
PrepareDistanceCache(distance_cache,
GetHasherCommon(handle)->params.num_last_distances_to_check);
}
/* Find a longest backward match of &data[cur_ix] up to the length of
max_length and stores the position cur_ix in the hash table.
REQUIRES: FN(PrepareDistanceCache) must be invoked for current distance cache
values; if this method is invoked repeatedly with the same distance
cache values, it is enough to invoke FN(PrepareDistanceCache) once.
Does not look for matches longer than max_length.
Does not look for matches further away than max_backward.
Writes the best match into |out|.
|out|->score is updated only if a better match is found. */
static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
const size_t max_length, const size_t max_backward, const size_t gap,
const size_t max_distance, HasherSearchResult* BROTLI_RESTRICT out) {
HasherCommon* common = GetHasherCommon(handle);
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
uint32_t* buckets = FN(Buckets)(self);
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
/* Don't accept a short copy from far away. */
score_t min_score = out->score;
score_t best_score = out->score;
size_t best_len = out->len;
size_t i;
out->len = 0;
out->len_code_delta = 0;
/* Try last distance first. */
for (i = 0; i < (size_t)common->params.num_last_distances_to_check; ++i) {
const size_t backward = (size_t)distance_cache[i];
size_t prev_ix = (size_t)(cur_ix - backward);
if (prev_ix >= cur_ix) {
continue;
}
if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
continue;
}
prev_ix &= ring_buffer_mask;
if (cur_ix_masked + best_len > ring_buffer_mask ||
prev_ix + best_len > ring_buffer_mask ||
data[cur_ix_masked + best_len] != data[prev_ix + best_len]) {
continue;
}
{
const size_t len = FindMatchLengthWithLimit(&data[prev_ix],
&data[cur_ix_masked],
max_length);
if (len >= 3 || (len == 2 && i < 2)) {
/* Comparing for >= 2 does not change the semantics, but just saves for
a few unnecessary binary logarithms in backward reference score,
since we are not interested in such short matches. */
score_t score = BackwardReferenceScoreUsingLastDistance(len);
if (best_score < score) {
if (i != 0) score -= BackwardReferencePenaltyUsingLastDistance(i);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
}
}
}
}
}
{
const uint32_t key = FN(HashBytes)(
&data[cur_ix_masked], self->hash_mask_, self->hash_shift_);
uint32_t* BROTLI_RESTRICT bucket =
&buckets[key << common->params.block_bits];
const size_t down =
(num[key] > self->block_size_) ?
(num[key] - self->block_size_) : 0u;
for (i = num[key]; i > down;) {
size_t prev_ix = bucket[--i & self->block_mask_];
const size_t backward = cur_ix - prev_ix;
if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
break;
}
prev_ix &= ring_buffer_mask;
if (cur_ix_masked + best_len > ring_buffer_mask ||
prev_ix + best_len > ring_buffer_mask ||
data[cur_ix_masked + best_len] != data[prev_ix + best_len]) {
continue;
}
{
const size_t len = FindMatchLengthWithLimit(&data[prev_ix],
&data[cur_ix_masked],
max_length);
if (len >= 4) {
/* Comparing for >= 3 does not change the semantics, but just saves
for a few unnecessary binary logarithms in backward reference
score, since we are not interested in such short matches. */
score_t score = BackwardReferenceScore(len, backward);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
}
}
}
}
bucket[num[key] & self->block_mask_] = (uint32_t)cur_ix;
++num[key];
}
if (min_score == out->score) {
SearchInStaticDictionary(dictionary,
handle, &data[cur_ix_masked], max_length, max_backward + gap,
max_distance, out, BROTLI_FALSE);
}
}
#undef HashLongestMatch

231
BaseTools/Source/C/BrotliCompress/enc/hash_longest_match_inc.h
View File

@ -5,158 +5,177 @@
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN, BUCKET_BITS, BLOCK_BITS,
NUM_LAST_DISTANCES_TO_CHECK */
/* template parameters: FN */
/* A (forgetful) hash table to the data seen by the compressor, to
help create backward references to previous data.
This is a hash map of fixed size (BUCKET_SIZE) to a ring buffer of
fixed size (BLOCK_SIZE). The ring buffer contains the last BLOCK_SIZE
This is a hash map of fixed size (bucket_size_) to a ring buffer of
fixed size (block_size_). The ring buffer contains the last block_size_
index positions of the given hash key in the compressed data. */
#define HashLongestMatch HASHER()
/* Number of hash buckets. */
#define BUCKET_SIZE (1 << BUCKET_BITS)
/* Only BLOCK_SIZE newest backward references are kept,
and the older are forgotten. */
#define BLOCK_SIZE (1u << BLOCK_BITS)
/* Mask for accessing entries in a block (in a ringbuffer manner). */
#define BLOCK_MASK ((1 << BLOCK_BITS) - 1)
#define HASH_MAP_SIZE (2 << BUCKET_BITS)
static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
/* HashBytes is the function that chooses the bucket to place
the address in. The HashLongestMatch and HashLongestMatchQuickly
classes have separate, different implementations of hashing. */
static uint32_t FN(HashBytes)(const uint8_t *data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32(data) * kHashMul32;
/* HashBytes is the function that chooses the bucket to place the address in. */
static uint32_t FN(HashBytes)(const uint8_t* data, const int shift) {
uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - BUCKET_BITS);
return (uint32_t)(h >> shift);
}
typedef struct HashLongestMatch {
/* Number of hash buckets. */
size_t bucket_size_;
/* Only block_size_ newest backward references are kept,
and the older are forgotten. */
size_t block_size_;
/* Left-shift for computing hash bucket index from hash value. */
int hash_shift_;
/* Mask for accessing entries in a block (in a ring-buffer manner). */
uint32_t block_mask_;
/* --- Dynamic size members --- */
/* Number of entries in a particular bucket. */
uint16_t num_[BUCKET_SIZE];
/* uint16_t num[bucket_size]; */
/* Buckets containing BLOCK_SIZE of backward references. */
uint32_t buckets_[BLOCK_SIZE << BUCKET_BITS];
/* True if num_ array needs to be initialized. */
BROTLI_BOOL is_dirty_;
DictionarySearchStatictics dict_search_stats_;
/* Buckets containing block_size_ of backward references. */
/* uint32_t* buckets[bucket_size * block_size]; */
} HashLongestMatch;
static void FN(Reset)(HashLongestMatch* self) {
self->is_dirty_ = BROTLI_TRUE;
DictionarySearchStaticticsReset(&self->dict_search_stats_);
static BROTLI_INLINE HashLongestMatch* FN(Self)(HasherHandle handle) {
return (HashLongestMatch*)&(GetHasherCommon(handle)[1]);
}
static void FN(InitEmpty)(HashLongestMatch* self) {
if (self->is_dirty_) {
memset(self->num_, 0, sizeof(self->num_));
self->is_dirty_ = BROTLI_FALSE;
}
static BROTLI_INLINE uint16_t* FN(Num)(HashLongestMatch* self) {
return (uint16_t*)(&self[1]);
}
static void FN(InitForData)(HashLongestMatch* self, const uint8_t* data,
size_t num) {
size_t i;
for (i = 0; i < num; ++i) {
const uint32_t key = FN(HashBytes)(&data[i]);
self->num_[key] = 0;
}
if (num != 0) {
self->is_dirty_ = BROTLI_FALSE;
}
static BROTLI_INLINE uint32_t* FN(Buckets)(HashLongestMatch* self) {
return (uint32_t*)(&FN(Num)(self)[self->bucket_size_]);
}
static void FN(Init)(
MemoryManager* m, HashLongestMatch* self, const uint8_t* data,
const BrotliEncoderParams* params, size_t position, size_t bytes,
BROTLI_BOOL is_last) {
/* Choose which init method is faster.
Init() is about 100 times faster than InitForData(). */
const size_t kMaxBytesForPartialHashInit = HASH_MAP_SIZE >> 7;
BROTLI_UNUSED(m);
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
HasherCommon* common = GetHasherCommon(handle);
HashLongestMatch* self = FN(Self)(handle);
BROTLI_UNUSED(params);
if (position == 0 && is_last && bytes <= kMaxBytesForPartialHashInit) {
FN(InitForData)(self, data, bytes);
self->hash_shift_ = 32 - common->params.bucket_bits;
self->bucket_size_ = (size_t)1 << common->params.bucket_bits;
self->block_size_ = (size_t)1 << common->params.block_bits;
self->block_mask_ = (uint32_t)(self->block_size_ - 1);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
/* Partial preparation is 100 times slower (per socket). */
size_t partial_prepare_threshold = self->bucket_size_ >> 6;
if (one_shot && input_size <= partial_prepare_threshold) {
size_t i;
for (i = 0; i < input_size; ++i) {
const uint32_t key = FN(HashBytes)(&data[i], self->hash_shift_);
num[key] = 0;
}
} else {
FN(InitEmpty)(self);
memset(num, 0, self->bucket_size_ * sizeof(num[0]));
}
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
size_t bucket_size = (size_t)1 << params->hasher.bucket_bits;
size_t block_size = (size_t)1 << params->hasher.block_bits;
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
return sizeof(HashLongestMatch) + bucket_size * (2 + 4 * block_size);
}
/* Look at 4 bytes at &data[ix & mask].
Compute a hash from these, and store the value of ix at that position. */
static BROTLI_INLINE void FN(Store)(HashLongestMatch* self, const uint8_t *data,
static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
const size_t mask, const size_t ix) {
const uint32_t key = FN(HashBytes)(&data[ix & mask]);
const size_t minor_ix = self->num_[key] & BLOCK_MASK;
self->buckets_[minor_ix + (key << BLOCK_BITS)] = (uint32_t)ix;
++self->num_[key];
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
const uint32_t key = FN(HashBytes)(&data[ix & mask], self->hash_shift_);
const size_t minor_ix = num[key] & self->block_mask_;
const size_t offset =
minor_ix + (key << GetHasherCommon(handle)->params.block_bits);
FN(Buckets)(self)[offset] = (uint32_t)ix;
++num[key];
}
static BROTLI_INLINE void FN(StoreRange)(HashLongestMatch* self,
const uint8_t *data, const size_t mask, const size_t ix_start,
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i;
for (i = ix_start; i < ix_end; ++i) {
FN(Store)(self, data, mask, i);
FN(Store)(handle, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HashLongestMatch* self,
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
/* Prepare the hashes for three last bytes of the last write.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
}
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
PrepareDistanceCache(distance_cache,
GetHasherCommon(handle)->params.num_last_distances_to_check);
}
/* Find a longest backward match of &data[cur_ix] up to the length of
max_length and stores the position cur_ix in the hash table.
REQUIRES: FN(PrepareDistanceCache) must be invoked for current distance cache
values; if this method is invoked repeatedly with the same distance
cache values, it is enough to invoke FN(PrepareDistanceCache) once.
Does not look for matches longer than max_length.
Does not look for matches further away than max_backward.
Writes the best match into |out|.
Returns true when match is found, otherwise false. */
static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(HashLongestMatch* self,
|out|->score is updated only if a better match is found. */
static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
const size_t max_length, const size_t max_backward,
HasherSearchResult* BROTLI_RESTRICT out) {
const size_t max_length, const size_t max_backward, const size_t gap,
const size_t max_distance, HasherSearchResult* BROTLI_RESTRICT out) {
HasherCommon* common = GetHasherCommon(handle);
HashLongestMatch* self = FN(Self)(handle);
uint16_t* num = FN(Num)(self);
uint32_t* buckets = FN(Buckets)(self);
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
BROTLI_BOOL is_match_found = BROTLI_FALSE;
/* Don't accept a short copy from far away. */
score_t min_score = out->score;
score_t best_score = out->score;
size_t best_len = out->len;
size_t i;
out->len = 0;
out->len_x_code = 0;
out->len_code_delta = 0;
/* Try last distance first. */
for (i = 0; i < NUM_LAST_DISTANCES_TO_CHECK; ++i) {
const size_t idx = kDistanceCacheIndex[i];
const size_t backward =
(size_t)(distance_cache[idx] + kDistanceCacheOffset[i]);
for (i = 0; i < (size_t)common->params.num_last_distances_to_check; ++i) {
const size_t backward = (size_t)distance_cache[i];
size_t prev_ix = (size_t)(cur_ix - backward);
if (prev_ix >= cur_ix) {
continue;
}
if (PREDICT_FALSE(backward > max_backward)) {
if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
continue;
}
prev_ix &= ring_buffer_mask;
@ -174,27 +193,31 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(HashLongestMatch* self,
/* Comparing for >= 2 does not change the semantics, but just saves for
a few unnecessary binary logarithms in backward reference score,
since we are not interested in such short matches. */
score_t score = BackwardReferenceScoreUsingLastDistance(len, i);
score_t score = BackwardReferenceScoreUsingLastDistance(len);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
is_match_found = BROTLI_TRUE;
if (i != 0) score -= BackwardReferencePenaltyUsingLastDistance(i);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = best_len;
out->distance = backward;
out->score = best_score;
}
}
}
}
}
{
const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
uint32_t* BROTLI_RESTRICT bucket = &self->buckets_[key << BLOCK_BITS];
const uint32_t key =
FN(HashBytes)(&data[cur_ix_masked], self->hash_shift_);
uint32_t* BROTLI_RESTRICT bucket =
&buckets[key << common->params.block_bits];
const size_t down =
(self->num_[key] > BLOCK_SIZE) ? (self->num_[key] - BLOCK_SIZE) : 0u;
for (i = self->num_[key]; i > down;) {
size_t prev_ix = bucket[--i & BLOCK_MASK];
(num[key] > self->block_size_) ? (num[key] - self->block_size_) : 0u;
for (i = num[key]; i > down;) {
size_t prev_ix = bucket[--i & self->block_mask_];
const size_t backward = cur_ix - prev_ix;
if (PREDICT_FALSE(backward > max_backward)) {
if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
break;
}
prev_ix &= ring_buffer_mask;
@ -218,24 +241,18 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(HashLongestMatch* self,
out->len = best_len;
out->distance = backward;
out->score = best_score;
is_match_found = BROTLI_TRUE;
}
}
}
}
bucket[self->num_[key] & BLOCK_MASK] = (uint32_t)cur_ix;
++self->num_[key];
bucket[num[key] & self->block_mask_] = (uint32_t)cur_ix;
++num[key];
}
if (!is_match_found) {
is_match_found = SearchInStaticDictionary(&self->dict_search_stats_,
&data[cur_ix_masked], max_length, max_backward, out, BROTLI_FALSE);
if (min_score == out->score) {
SearchInStaticDictionary(dictionary,
handle, &data[cur_ix_masked], max_length, max_backward + gap,
max_distance, out, BROTLI_FALSE);
}
return is_match_found;
}
#undef HASH_MAP_SIZE
#undef BLOCK_MASK
#undef BLOCK_SIZE
#undef BUCKET_SIZE
#undef HashLongestMatch

163
BaseTools/Source/C/BrotliCompress/enc/hash_longest_match_quickly_inc.h
View File

@ -5,7 +5,9 @@
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN, BUCKET_BITS, BUCKET_SWEEP, USE_DICTIONARY */
/* template parameters: FN, BUCKET_BITS, BUCKET_SWEEP, HASH_LEN,
USE_DICTIONARY
*/
#define HashLongestMatchQuickly HASHER()
@ -19,10 +21,9 @@ static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 8; }
/* HashBytes is the function that chooses the bucket to place
the address in. The HashLongestMatch and HashLongestMatchQuickly
classes have separate, different implementations of hashing. */
static uint32_t FN(HashBytes)(const uint8_t *data) {
/* Computing a hash based on 5 bytes works much better for
qualities 1 and 3, where the next hash value is likely to replace */
uint64_t h = (BROTLI_UNALIGNED_LOAD64(data) << 24) * kHashMul32;
static uint32_t FN(HashBytes)(const uint8_t* data) {
const uint64_t h = ((BROTLI_UNALIGNED_LOAD64LE(data) << (64 - 8 * HASH_LEN)) *
kHashMul64);
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return (uint32_t)(h >> (64 - BUCKET_BITS));
@ -35,88 +36,86 @@ static uint32_t FN(HashBytes)(const uint8_t *data) {
given index, BUCKET_SWEEP buckets are used to store values of a key. */
typedef struct HashLongestMatchQuickly {
uint32_t buckets_[BUCKET_SIZE + BUCKET_SWEEP];
/* True if buckets_ array needs to be initialized. */
BROTLI_BOOL is_dirty_;
DictionarySearchStatictics dict_search_stats_;
} HashLongestMatchQuickly;
static void FN(Reset)(HashLongestMatchQuickly* self) {
self->is_dirty_ = BROTLI_TRUE;
DictionarySearchStaticticsReset(&self->dict_search_stats_);
static BROTLI_INLINE HashLongestMatchQuickly* FN(Self)(HasherHandle handle) {
return (HashLongestMatchQuickly*)&(GetHasherCommon(handle)[1]);
}
static void FN(InitEmpty)(HashLongestMatchQuickly* self) {
if (self->is_dirty_) {
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
BROTLI_UNUSED(handle);
BROTLI_UNUSED(params);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashLongestMatchQuickly* self = FN(Self)(handle);
/* Partial preparation is 100 times slower (per socket). */
size_t partial_prepare_threshold = HASH_MAP_SIZE >> 7;
if (one_shot && input_size <= partial_prepare_threshold) {
size_t i;
for (i = 0; i < input_size; ++i) {
const uint32_t key = FN(HashBytes)(&data[i]);
memset(&self->buckets_[key], 0, BUCKET_SWEEP * sizeof(self->buckets_[0]));
}
} else {
/* It is not strictly necessary to fill this buffer here, but
not filling will make the results of the compression stochastic
(but correct). This is because random data would cause the
system to find accidentally good backward references here and there. */
memset(&self->buckets_[0], 0, sizeof(self->buckets_));
self->is_dirty_ = BROTLI_FALSE;
}
}
static void FN(InitForData)(HashLongestMatchQuickly* self, const uint8_t* data,
size_t num) {
size_t i;
for (i = 0; i < num; ++i) {
const uint32_t key = FN(HashBytes)(&data[i]);
memset(&self->buckets_[key], 0, BUCKET_SWEEP * sizeof(self->buckets_[0]));
}
if (num != 0) {
self->is_dirty_ = BROTLI_FALSE;
}
}
static void FN(Init)(
MemoryManager* m, HashLongestMatchQuickly* self, const uint8_t* data,
const BrotliEncoderParams* params, size_t position, size_t bytes,
BROTLI_BOOL is_last) {
/* Choose which init method is faster.
Init() is about 100 times faster than InitForData(). */
const size_t kMaxBytesForPartialHashInit = HASH_MAP_SIZE >> 7;
BROTLI_UNUSED(m);
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
BROTLI_UNUSED(params);
if (position == 0 && is_last && bytes <= kMaxBytesForPartialHashInit) {
FN(InitForData)(self, data, bytes);
} else {
FN(InitEmpty)(self);
}
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
return sizeof(HashLongestMatchQuickly);
}
/* Look at 5 bytes at &data[ix & mask].
Compute a hash from these, and store the value somewhere within
[ix .. ix+3]. */
static BROTLI_INLINE void FN(Store)(HashLongestMatchQuickly* self,
const uint8_t *data, const size_t mask, const size_t ix) {
static BROTLI_INLINE void FN(Store)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix) {
const uint32_t key = FN(HashBytes)(&data[ix & mask]);
/* Wiggle the value with the bucket sweep range. */
const uint32_t off = (ix >> 3) % BUCKET_SWEEP;
self->buckets_[key + off] = (uint32_t)ix;
FN(Self)(handle)->buckets_[key + off] = (uint32_t)ix;
}
static BROTLI_INLINE void FN(StoreRange)(HashLongestMatchQuickly* self,
const uint8_t *data, const size_t mask, const size_t ix_start,
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i;
for (i = ix_start; i < ix_end; ++i) {
FN(Store)(self, data, mask, i);
FN(Store)(handle, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(
HashLongestMatchQuickly* self, size_t num_bytes, size_t position,
HasherHandle handle, size_t num_bytes, size_t position,
const uint8_t* ringbuffer, size_t ringbuffer_mask) {
if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
/* Prepare the hashes for three last bytes of the last write.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
}
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
BROTLI_UNUSED(handle);
BROTLI_UNUSED(distance_cache);
}
/* Find a longest backward match of &data[cur_ix & ring_buffer_mask]
up to the length of max_length and stores the position cur_ix in the
hash table.
@ -124,22 +123,25 @@ static BROTLI_INLINE void FN(StitchToPreviousBlock)(
Does not look for matches longer than max_length.
Does not look for matches further away than max_backward.
Writes the best match into |out|.
Returns true if match is found, otherwise false. */
static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
HashLongestMatchQuickly* self, const uint8_t* BROTLI_RESTRICT data,
|out|->score is updated only if a better match is found. */
static BROTLI_INLINE void FN(FindLongestMatch)(
HasherHandle handle, const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data,
const size_t ring_buffer_mask, const int* BROTLI_RESTRICT distance_cache,
const size_t cur_ix, const size_t max_length, const size_t max_backward,
const size_t gap, const size_t max_distance,
HasherSearchResult* BROTLI_RESTRICT out) {
HashLongestMatchQuickly* self = FN(Self)(handle);
const size_t best_len_in = out->len;
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
int compare_char = data[cur_ix_masked + best_len_in];
score_t min_score = out->score;
score_t best_score = out->score;
size_t best_len = best_len_in;
size_t cached_backward = (size_t)distance_cache[0];
size_t prev_ix = cur_ix - cached_backward;
BROTLI_BOOL is_match_found = BROTLI_FALSE;
out->len_x_code = 0;
out->len_code_delta = 0;
if (prev_ix < cur_ix) {
prev_ix &= (uint32_t)ring_buffer_mask;
if (compare_char == data[prev_ix + best_len]) {
@ -147,17 +149,18 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
&data[cur_ix_masked],
max_length);
if (len >= 4) {
best_score = BackwardReferenceScoreUsingLastDistance(len, 0);
best_len = len;
out->len = len;
out->distance = cached_backward;
out->score = best_score;
compare_char = data[cur_ix_masked + best_len];
if (BUCKET_SWEEP == 1) {
self->buckets_[key] = (uint32_t)cur_ix;
return BROTLI_TRUE;
} else {
is_match_found = BROTLI_TRUE;
const score_t score = BackwardReferenceScoreUsingLastDistance(len);
if (best_score < score) {
best_score = score;
best_len = len;
out->len = len;
out->distance = cached_backward;
out->score = best_score;
compare_char = data[cur_ix_masked + best_len];
if (BUCKET_SWEEP == 1) {
self->buckets_[key] = (uint32_t)cur_ix;
return;
}
}
}
}
@ -171,22 +174,25 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
backward = cur_ix - prev_ix;
prev_ix &= (uint32_t)ring_buffer_mask;
if (compare_char != data[prev_ix + best_len_in]) {
return BROTLI_FALSE;
return;
}
if (PREDICT_FALSE(backward == 0 || backward > max_backward)) {
return BROTLI_FALSE;
if (BROTLI_PREDICT_FALSE(backward == 0 || backward > max_backward)) {
return;
}
len = FindMatchLengthWithLimit(&data[prev_ix],
&data[cur_ix_masked],
max_length);
if (len >= 4) {
out->len = len;
out->distance = backward;
out->score = BackwardReferenceScore(len, backward);
return BROTLI_TRUE;
const score_t score = BackwardReferenceScore(len, backward);
if (best_score < score) {
out->len = len;
out->distance = backward;
out->score = score;
return;
}
}
} else {
uint32_t *bucket = self->buckets_ + key;
uint32_t* bucket = self->buckets_ + key;
int i;
prev_ix = *bucket++;
for (i = 0; i < BUCKET_SWEEP; ++i, prev_ix = *bucket++) {
@ -196,7 +202,7 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
if (compare_char != data[prev_ix + best_len]) {
continue;
}
if (PREDICT_FALSE(backward == 0 || backward > max_backward)) {
if (BROTLI_PREDICT_FALSE(backward == 0 || backward > max_backward)) {
continue;
}
len = FindMatchLengthWithLimit(&data[prev_ix],
@ -211,17 +217,16 @@ static BROTLI_INLINE BROTLI_BOOL FN(FindLongestMatch)(
out->distance = backward;
out->score = score;
compare_char = data[cur_ix_masked + best_len];
is_match_found = BROTLI_TRUE;
}
}
}
}
if (USE_DICTIONARY && !is_match_found) {
is_match_found = SearchInStaticDictionary(&self->dict_search_stats_,
&data[cur_ix_masked], max_length, max_backward, out, BROTLI_TRUE);
if (USE_DICTIONARY && min_score == out->score) {
SearchInStaticDictionary(dictionary,
handle, &data[cur_ix_masked], max_length, max_backward + gap,
max_distance, out, BROTLI_TRUE);
}
self->buckets_[key + ((cur_ix >> 3) % BUCKET_SWEEP)] = (uint32_t)cur_ix;
return is_match_found;
}
#undef HASH_MAP_SIZE

215
BaseTools/Source/C/BrotliCompress/enc/hash_rolling_inc.h Normal file
View File

@ -0,0 +1,215 @@
/* NOLINT(build/header_guard) */
/* Copyright 2018 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN, JUMP, NUMBUCKETS, MASK, CHUNKLEN */
/* NUMBUCKETS / (MASK + 1) = probability of storing and using hash code. */
/* JUMP = skip bytes for speedup */
/* Rolling hash for long distance long string matches. Stores one position
per bucket, bucket key is computed over a long region. */
#define HashRolling HASHER()
static const uint32_t FN(kRollingHashMul32) = 69069;
static const uint32_t FN(kInvalidPos) = 0xffffffff;
/* This hasher uses a longer forward length, but returning a higher value here
will hurt compression by the main hasher when combined with a composite
hasher. The hasher tests for forward itself instead. */
static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
/* Computes a code from a single byte. A lookup table of 256 values could be
used, but simply adding 1 works about as good. */
static uint32_t FN(HashByte)(uint8_t byte) {
return (uint32_t)byte + 1u;
}
static uint32_t FN(HashRollingFunctionInitial)(uint32_t state, uint8_t add,
uint32_t factor) {
return (uint32_t)(factor * state + FN(HashByte)(add));
}
static uint32_t FN(HashRollingFunction)(uint32_t state, uint8_t add,
uint8_t rem, uint32_t factor,
uint32_t factor_remove) {
return (uint32_t)(factor * state +
FN(HashByte)(add) - factor_remove * FN(HashByte)(rem));
}
typedef struct HashRolling {
uint32_t state;
uint32_t* table;
size_t next_ix;
uint32_t chunk_len;
uint32_t factor;
uint32_t factor_remove;
} HashRolling;
static BROTLI_INLINE HashRolling* FN(Self)(HasherHandle handle) {
return (HashRolling*)&(GetHasherCommon(handle)[1]);
}
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
HashRolling* self = FN(Self)(handle);
size_t i;
self->state = 0;
self->next_ix = 0;
self->factor = FN(kRollingHashMul32);
/* Compute the factor of the oldest byte to remove: factor**steps modulo
0xffffffff (the multiplications rely on 32-bit overflow) */
self->factor_remove = 1;
for (i = 0; i < CHUNKLEN; i += JUMP) {
self->factor_remove *= self->factor;
}
self->table = (uint32_t*)((HasherHandle)self + sizeof(HashRolling));
for (i = 0; i < NUMBUCKETS; i++) {
self->table[i] = FN(kInvalidPos);
}
BROTLI_UNUSED(params);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashRolling* self = FN(Self)(handle);
size_t i;
/* Too small size, cannot use this hasher. */
if (input_size < CHUNKLEN) return;
self->state = 0;
for (i = 0; i < CHUNKLEN; i += JUMP) {
self->state = FN(HashRollingFunctionInitial)(
self->state, data[i], self->factor);
}
BROTLI_UNUSED(one_shot);
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
return sizeof(HashRolling) + NUMBUCKETS * sizeof(uint32_t);
BROTLI_UNUSED(params);
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
}
static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
BROTLI_UNUSED(handle);
BROTLI_UNUSED(data);
BROTLI_UNUSED(mask);
BROTLI_UNUSED(ix);
}
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
BROTLI_UNUSED(handle);
BROTLI_UNUSED(data);
BROTLI_UNUSED(mask);
BROTLI_UNUSED(ix_start);
BROTLI_UNUSED(ix_end);
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ring_buffer_mask) {
/* In this case we must re-initialize the hasher from scratch from the
current position. */
HashRolling* self = FN(Self)(handle);
size_t position_masked;
size_t available = num_bytes;
if ((position & (JUMP - 1)) != 0) {
size_t diff = JUMP - (position & (JUMP - 1));
available = (diff > available) ? 0 : (available - diff);
position += diff;
}
position_masked = position & ring_buffer_mask;
/* wrapping around ringbuffer not handled. */
if (available > ring_buffer_mask - position_masked) {
available = ring_buffer_mask - position_masked;
}
FN(Prepare)(handle, BROTLI_FALSE, available,
ringbuffer + (position & ring_buffer_mask));
self->next_ix = position;
BROTLI_UNUSED(num_bytes);
}
static BROTLI_INLINE void FN(PrepareDistanceCache)(
HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
BROTLI_UNUSED(handle);
BROTLI_UNUSED(distance_cache);
}
static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary,
const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
const size_t max_length, const size_t max_backward, const size_t gap,
const size_t max_distance, HasherSearchResult* BROTLI_RESTRICT out) {
HashRolling* self = FN(Self)(handle);
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
size_t pos = self->next_ix;
if ((cur_ix & (JUMP - 1)) != 0) return;
/* Not enough lookahead */
if (max_length < CHUNKLEN) return;
for (pos = self->next_ix; pos <= cur_ix; pos += JUMP) {
uint32_t code = self->state & MASK;
uint8_t rem = data[pos & ring_buffer_mask];
uint8_t add = data[(pos + CHUNKLEN) & ring_buffer_mask];
size_t found_ix = FN(kInvalidPos);
self->state = FN(HashRollingFunction)(
self->state, add, rem, self->factor, self->factor_remove);
if (code < NUMBUCKETS) {
found_ix = self->table[code];
self->table[code] = (uint32_t)pos;
if (pos == cur_ix && found_ix != FN(kInvalidPos)) {
/* The cast to 32-bit makes backward distances up to 4GB work even
if cur_ix is above 4GB, despite using 32-bit values in the table. */
size_t backward = (uint32_t)(cur_ix - found_ix);
if (backward <= max_backward) {
const size_t found_ix_masked = found_ix & ring_buffer_mask;
const size_t len = FindMatchLengthWithLimit(&data[found_ix_masked],
&data[cur_ix_masked],
max_length);
if (len >= 4 && len > out->len) {
score_t score = BackwardReferenceScore(len, backward);
if (score > out->score) {
out->len = len;
out->distance = backward;
out->score = score;
out->len_code_delta = 0;
}
}
}
}
}
}
self->next_ix = cur_ix + JUMP;
/* NOTE: this hasher does not search in the dictionary. It is used as
backup-hasher, the main hasher already searches in it. */
BROTLI_UNUSED(dictionary);
BROTLI_UNUSED(distance_cache);
BROTLI_UNUSED(gap);
BROTLI_UNUSED(max_distance);
}
#undef HashRolling

327
BaseTools/Source/C/BrotliCompress/enc/hash_to_binary_tree_inc.h Normal file
View File

@ -0,0 +1,327 @@
/* NOLINT(build/header_guard) */
/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* template parameters: FN, BUCKET_BITS, MAX_TREE_COMP_LENGTH,
MAX_TREE_SEARCH_DEPTH */
/* A (forgetful) hash table where each hash bucket contains a binary tree of
sequences whose first 4 bytes share the same hash code.
Each sequence is MAX_TREE_COMP_LENGTH long and is identified by its starting
position in the input data. The binary tree is sorted by the lexicographic
order of the sequences, and it is also a max-heap with respect to the
starting positions. */
#define HashToBinaryTree HASHER()
#define BUCKET_SIZE (1 << BUCKET_BITS)
static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
static BROTLI_INLINE size_t FN(StoreLookahead)(void) {
return MAX_TREE_COMP_LENGTH;
}
static uint32_t FN(HashBytes)(const uint8_t* data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - BUCKET_BITS);
}
typedef struct HashToBinaryTree {
/* The window size minus 1 */
size_t window_mask_;
/* Hash table that maps the 4-byte hashes of the sequence to the last
position where this hash was found, which is the root of the binary
tree of sequences that share this hash bucket. */
uint32_t buckets_[BUCKET_SIZE];
/* A position used to mark a non-existent sequence, i.e. a tree is empty if
its root is at invalid_pos_ and a node is a leaf if both its children
are at invalid_pos_. */
uint32_t invalid_pos_;
/* --- Dynamic size members --- */
/* The union of the binary trees of each hash bucket. The root of the tree
corresponding to a hash is a sequence starting at buckets_[hash] and
the left and right children of a sequence starting at pos are
forest_[2 * pos] and forest_[2 * pos + 1]. */
/* uint32_t forest[2 * num_nodes] */
} HashToBinaryTree;
static BROTLI_INLINE HashToBinaryTree* FN(Self)(HasherHandle handle) {
return (HashToBinaryTree*)&(GetHasherCommon(handle)[1]);
}
static BROTLI_INLINE uint32_t* FN(Forest)(HashToBinaryTree* self) {
return (uint32_t*)(&self[1]);
}
static void FN(Initialize)(
HasherHandle handle, const BrotliEncoderParams* params) {
HashToBinaryTree* self = FN(Self)(handle);
self->window_mask_ = (1u << params->lgwin) - 1u;
self->invalid_pos_ = (uint32_t)(0 - self->window_mask_);
}
static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
size_t input_size, const uint8_t* data) {
HashToBinaryTree* self = FN(Self)(handle);
uint32_t invalid_pos = self->invalid_pos_;
uint32_t i;
BROTLI_UNUSED(data);
BROTLI_UNUSED(one_shot);
BROTLI_UNUSED(input_size);
for (i = 0; i < BUCKET_SIZE; i++) {
self->buckets_[i] = invalid_pos;
}
}
static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
size_t input_size) {
size_t num_nodes = (size_t)1 << params->lgwin;
if (one_shot && input_size < num_nodes) {
num_nodes = input_size;
}
return sizeof(HashToBinaryTree) + 2 * sizeof(uint32_t) * num_nodes;
}
static BROTLI_INLINE size_t FN(LeftChildIndex)(HashToBinaryTree* self,
const size_t pos) {
return 2 * (pos & self->window_mask_);
}
static BROTLI_INLINE size_t FN(RightChildIndex)(HashToBinaryTree* self,
const size_t pos) {
return 2 * (pos & self->window_mask_) + 1;
}
/* Stores the hash of the next 4 bytes and in a single tree-traversal, the
hash bucket's binary tree is searched for matches and is re-rooted at the
current position.
If less than MAX_TREE_COMP_LENGTH data is available, the hash bucket of the
current position is searched for matches, but the state of the hash table
is not changed, since we can not know the final sorting order of the
current (incomplete) sequence.
This function must be called with increasing cur_ix positions. */
static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
HashToBinaryTree* self, const uint8_t* const BROTLI_RESTRICT data,
const size_t cur_ix, const size_t ring_buffer_mask, const size_t max_length,
const size_t max_backward, size_t* const BROTLI_RESTRICT best_len,
BackwardMatch* BROTLI_RESTRICT matches) {
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
const size_t max_comp_len =
BROTLI_MIN(size_t, max_length, MAX_TREE_COMP_LENGTH);
const BROTLI_BOOL should_reroot_tree =
TO_BROTLI_BOOL(max_length >= MAX_TREE_COMP_LENGTH);
const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
uint32_t* forest = FN(Forest)(self);
size_t prev_ix = self->buckets_[key];
/* The forest index of the rightmost node of the left subtree of the new
root, updated as we traverse and re-root the tree of the hash bucket. */
size_t node_left = FN(LeftChildIndex)(self, cur_ix);
/* The forest index of the leftmost node of the right subtree of the new
root, updated as we traverse and re-root the tree of the hash bucket. */
size_t node_right = FN(RightChildIndex)(self, cur_ix);
/* The match length of the rightmost node of the left subtree of the new
root, updated as we traverse and re-root the tree of the hash bucket. */
size_t best_len_left = 0;
/* The match length of the leftmost node of the right subtree of the new
root, updated as we traverse and re-root the tree of the hash bucket. */
size_t best_len_right = 0;
size_t depth_remaining;
if (should_reroot_tree) {
self->buckets_[key] = (uint32_t)cur_ix;
}
for (depth_remaining = MAX_TREE_SEARCH_DEPTH; ; --depth_remaining) {
const size_t backward = cur_ix - prev_ix;
const size_t prev_ix_masked = prev_ix & ring_buffer_mask;
if (backward == 0 || backward > max_backward || depth_remaining == 0) {
if (should_reroot_tree) {
forest[node_left] = self->invalid_pos_;
forest[node_right] = self->invalid_pos_;
}
break;
}
{
const size_t cur_len = BROTLI_MIN(size_t, best_len_left, best_len_right);
size_t len;
BROTLI_DCHECK(cur_len <= MAX_TREE_COMP_LENGTH);
len = cur_len +
FindMatchLengthWithLimit(&data[cur_ix_masked + cur_len],
&data[prev_ix_masked + cur_len],
max_length - cur_len);
BROTLI_DCHECK(
0 == memcmp(&data[cur_ix_masked], &data[prev_ix_masked], len));
if (matches && len > *best_len) {
*best_len = len;
InitBackwardMatch(matches++, backward, len);
}
if (len >= max_comp_len) {
if (should_reroot_tree) {
forest[node_left] = forest[FN(LeftChildIndex)(self, prev_ix)];
forest[node_right] = forest[FN(RightChildIndex)(self, prev_ix)];
}
break;
}
if (data[cur_ix_masked + len] > data[prev_ix_masked + len]) {
best_len_left = len;
if (should_reroot_tree) {
forest[node_left] = (uint32_t)prev_ix;
}
node_left = FN(RightChildIndex)(self, prev_ix);
prev_ix = forest[node_left];
} else {
best_len_right = len;
if (should_reroot_tree) {
forest[node_right] = (uint32_t)prev_ix;
}
node_right = FN(LeftChildIndex)(self, prev_ix);
prev_ix = forest[node_right];
}
}
}
return matches;
}
/* Finds all backward matches of &data[cur_ix & ring_buffer_mask] up to the
length of max_length and stores the position cur_ix in the hash table.
Sets *num_matches to the number of matches found, and stores the found
matches in matches[0] to matches[*num_matches - 1]. The matches will be
sorted by strictly increasing length and (non-strictly) increasing
distance. */
static BROTLI_INLINE size_t FN(FindAllMatches)(HasherHandle handle,
const BrotliEncoderDictionary* dictionary, const uint8_t* data,
const size_t ring_buffer_mask, const size_t cur_ix,
const size_t max_length, const size_t max_backward, const size_t gap,
const BrotliEncoderParams* params, BackwardMatch* matches) {
BackwardMatch* const orig_matches = matches;
const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
size_t best_len = 1;
const size_t short_match_max_backward =
params->quality != HQ_ZOPFLIFICATION_QUALITY ? 16 : 64;
size_t stop = cur_ix - short_match_max_backward;
uint32_t dict_matches[BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN + 1];
size_t i;
if (cur_ix < short_match_max_backward) { stop = 0; }
for (i = cur_ix - 1; i > stop && best_len <= 2; --i) {
size_t prev_ix = i;
const size_t backward = cur_ix - prev_ix;
if (BROTLI_PREDICT_FALSE(backward > max_backward)) {
break;
}
prev_ix &= ring_buffer_mask;
if (data[cur_ix_masked] != data[prev_ix] ||
data[cur_ix_masked + 1] != data[prev_ix + 1]) {
continue;
}
{
const size_t len =
FindMatchLengthWithLimit(&data[prev_ix], &data[cur_ix_masked],
max_length);
if (len > best_len) {
best_len = len;
InitBackwardMatch(matches++, backward, len);
}
}
}
if (best_len < max_length) {
matches = FN(StoreAndFindMatches)(FN(Self)(handle), data, cur_ix,
ring_buffer_mask, max_length, max_backward, &best_len, matches);
}
for (i = 0; i <= BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN; ++i) {
dict_matches[i] = kInvalidMatch;
}
{
size_t minlen = BROTLI_MAX(size_t, 4, best_len + 1);
if (BrotliFindAllStaticDictionaryMatches(dictionary,
&data[cur_ix_masked], minlen, max_length, &dict_matches[0])) {
size_t maxlen = BROTLI_MIN(
size_t, BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN, max_length);
size_t l;
for (l = minlen; l <= maxlen; ++l) {
uint32_t dict_id = dict_matches[l];
if (dict_id < kInvalidMatch) {
size_t distance = max_backward + gap + (dict_id >> 5) + 1;
if (distance <= params->dist.max_distance) {
InitDictionaryBackwardMatch(matches++, distance, l, dict_id & 31);
}
}
}
}
}
return (size_t)(matches - orig_matches);
}
/* Stores the hash of the next 4 bytes and re-roots the binary tree at the
current sequence, without returning any matches.
REQUIRES: ix + MAX_TREE_COMP_LENGTH <= end-of-current-block */
static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
const size_t mask, const size_t ix) {
HashToBinaryTree* self = FN(Self)(handle);
/* Maximum distance is window size - 16, see section 9.1. of the spec. */
const size_t max_backward = self->window_mask_ - BROTLI_WINDOW_GAP + 1;
FN(StoreAndFindMatches)(self, data, ix, mask, MAX_TREE_COMP_LENGTH,
max_backward, NULL, NULL);
}
static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
const uint8_t* data, const size_t mask, const size_t ix_start,
const size_t ix_end) {
size_t i = ix_start;
size_t j = ix_start;
if (ix_start + 63 <= ix_end) {
i = ix_end - 63;
}
if (ix_start + 512 <= i) {
for (; j < i; j += 8) {
FN(Store)(handle, data, mask, j);
}
}
for (; i < ix_end; ++i) {
FN(Store)(handle, data, mask, i);
}
}
static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
size_t num_bytes, size_t position, const uint8_t* ringbuffer,
size_t ringbuffer_mask) {
HashToBinaryTree* self = FN(Self)(handle);
if (num_bytes >= FN(HashTypeLength)() - 1 &&
position >= MAX_TREE_COMP_LENGTH) {
/* Store the last `MAX_TREE_COMP_LENGTH - 1` positions in the hasher.
These could not be calculated before, since they require knowledge
of both the previous and the current block. */
const size_t i_start = position - MAX_TREE_COMP_LENGTH + 1;
const size_t i_end = BROTLI_MIN(size_t, position, i_start + num_bytes);
size_t i;
for (i = i_start; i < i_end; ++i) {
/* Maximum distance is window size - 16, see section 9.1. of the spec.
Furthermore, we have to make sure that we don't look further back
from the start of the next block than the window size, otherwise we
could access already overwritten areas of the ring-buffer. */
const size_t max_backward =
self->window_mask_ - BROTLI_MAX(size_t,
BROTLI_WINDOW_GAP - 1,
position - i);
/* We know that i + MAX_TREE_COMP_LENGTH <= position + num_bytes, i.e. the
end of the current block and that we have at least
MAX_TREE_COMP_LENGTH tail in the ring-buffer. */
FN(StoreAndFindMatches)(self, ringbuffer, i, ringbuffer_mask,
MAX_TREE_COMP_LENGTH, max_backward, NULL, NULL);
}
}
}
#undef BUCKET_SIZE
#undef HashToBinaryTree

13
BaseTools/Source/C/BrotliCompress/enc/histogram.c
View File

@ -8,9 +8,9 @@
#include "./histogram.h"
#include "../common/context.h"
#include "./block_splitter.h"
#include "./command.h"
#include "./context.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -63,11 +63,16 @@ void BrotliBuildHistogramsWithContext(
BlockSplitIteratorNext(&insert_and_copy_it);
HistogramAddCommand(&insert_and_copy_histograms[insert_and_copy_it.type_],
cmd->cmd_prefix_);
/* TODO: unwrap iterator blocks. */
for (j = cmd->insert_len_; j != 0; --j) {
size_t context;
BlockSplitIteratorNext(&literal_it);
context = (literal_it.type_ << BROTLI_LITERAL_CONTEXT_BITS) +
Context(prev_byte, prev_byte2, context_modes[literal_it.type_]);
context = literal_it.type_;
if (context_modes) {
ContextLut lut = BROTLI_CONTEXT_LUT(context_modes[context]);
context = (context << BROTLI_LITERAL_CONTEXT_BITS) +
BROTLI_CONTEXT(prev_byte, prev_byte2, lut);
}
HistogramAddLiteral(&literal_histograms[context],
ringbuffer[pos & mask]);
prev_byte2 = prev_byte;
@ -84,7 +89,7 @@ void BrotliBuildHistogramsWithContext(
context = (dist_it.type_ << BROTLI_DISTANCE_CONTEXT_BITS) +
CommandDistanceContext(cmd);
HistogramAddDistance(&copy_dist_histograms[context],
cmd->dist_prefix_);
cmd->dist_prefix_ & 0x3FF);
}
}
}

11
BaseTools/Source/C/BrotliCompress/enc/histogram.h
View File

@ -12,16 +12,19 @@
#include <string.h> /* memset */
#include "../common/constants.h"
#include "../common/types.h"
#include "../common/context.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./block_splitter.h"
#include "./command.h"
#include "./context.h"
#include "./port.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* The distance symbols effectively used by "Large Window Brotli" (32-bit). */
#define BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS 544
#define FN(X) X ## Literal
#define DATA_SIZE BROTLI_NUM_LITERAL_SYMBOLS
#define DataType uint8_t
@ -38,7 +41,7 @@ extern "C" {
#undef FN
#define FN(X) X ## Distance
#define DATA_SIZE BROTLI_NUM_DISTANCE_SYMBOLS
#define DATA_SIZE BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS
#include "./histogram_inc.h" /* NOLINT(build/include) */
#undef DataType
#undef DATA_SIZE

2
BaseTools/Source/C/BrotliCompress/enc/histogram_inc.h
View File

@ -33,7 +33,7 @@ static BROTLI_INLINE void FN(HistogramAdd)(FN(Histogram)* self, size_t val) {
}
static BROTLI_INLINE void FN(HistogramAddVector)(FN(Histogram)* self,
const DataType *p, size_t n) {
const DataType* p, size_t n) {
self->total_count_ += n;
n += 1;
while (--n) ++self->data_[*p++];

21
BaseTools/Source/C/BrotliCompress/enc/literal_cost.c
View File

@ -9,9 +9,9 @@
#include "./literal_cost.h"
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./fast_log.h"
#include "./port.h"
#include "./utf8_util.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -25,7 +25,7 @@ static size_t UTF8Position(size_t last, size_t c, size_t clamp) {
return BROTLI_MIN(size_t, 1, clamp);
} else {
/* Let's decide over the last byte if this ends the sequence. */
if (last < 0xe0) {
if (last < 0xE0) {
return 0; /* Completed two or three byte coding. */
} else { /* Next one is the 'Byte 3' of utf-8 encoding. */
return BROTLI_MIN(size_t, 2, clamp);
@ -34,16 +34,14 @@ static size_t UTF8Position(size_t last, size_t c, size_t clamp) {
}
static size_t DecideMultiByteStatsLevel(size_t pos, size_t len, size_t mask,
const uint8_t *data) {
const uint8_t* data) {
size_t counts[3] = { 0 };
size_t max_utf8 = 1; /* should be 2, but 1 compresses better. */
size_t last_c = 0;
size_t utf8_pos = 0;
size_t i;
for (i = 0; i < len; ++i) {
size_t c = data[(pos + i) & mask];
utf8_pos = UTF8Position(last_c, c, 2);
++counts[utf8_pos];
++counts[UTF8Position(last_c, c, 2)];
last_c = c;
}
if (counts[2] < 500) {
@ -56,16 +54,15 @@ static size_t DecideMultiByteStatsLevel(size_t pos, size_t len, size_t mask,
}
static void EstimateBitCostsForLiteralsUTF8(size_t pos, size_t len, size_t mask,
const uint8_t *data, float *cost) {
/* max_utf8 is 0 (normal ascii single byte modeling),
1 (for 2-byte utf-8 modeling), or 2 (for 3-byte utf-8 modeling). */
const uint8_t* data, float* cost) {
/* max_utf8 is 0 (normal ASCII single byte modeling),
1 (for 2-byte UTF-8 modeling), or 2 (for 3-byte UTF-8 modeling). */
const size_t max_utf8 = DecideMultiByteStatsLevel(pos, len, mask, data);
size_t histogram[3][256] = { { 0 } };
size_t window_half = 495;
size_t in_window = BROTLI_MIN(size_t, window_half, len);
size_t in_window_utf8[3] = { 0 };
size_t i;
{ /* Bootstrap histograms. */
size_t last_c = 0;
@ -128,7 +125,7 @@ static void EstimateBitCostsForLiteralsUTF8(size_t pos, size_t len, size_t mask,
}
void BrotliEstimateBitCostsForLiterals(size_t pos, size_t len, size_t mask,
const uint8_t *data, float *cost) {
const uint8_t* data, float* cost) {
if (BrotliIsMostlyUTF8(data, pos, mask, len, kMinUTF8Ratio)) {
EstimateBitCostsForLiteralsUTF8(pos, len, mask, data, cost);
return;

8
BaseTools/Source/C/BrotliCompress/enc/literal_cost.h
View File

@ -10,18 +10,18 @@
#ifndef BROTLI_ENC_LITERAL_COST_H_
#define BROTLI_ENC_LITERAL_COST_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Estimates how many bits the literals in the interval [pos, pos + len) in the
ringbuffer (data, mask) will take entropy coded and writes these estimates
ring-buffer (data, mask) will take entropy coded and writes these estimates
to the cost[0..len) array. */
BROTLI_INTERNAL void BrotliEstimateBitCostsForLiterals(
size_t pos, size_t len, size_t mask, const uint8_t *data, float *cost);
size_t pos, size_t len, size_t mask, const uint8_t* data, float* cost);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */

23
BaseTools/Source/C/BrotliCompress/enc/memory.c
View File

@ -9,12 +9,11 @@
#include "./memory.h"
#include <assert.h>
#include <stdlib.h> /* exit, free, malloc */
#include <string.h> /* memcpy */
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -28,22 +27,12 @@ extern "C" {
#define NEW_ALLOCATED_OFFSET MAX_PERM_ALLOCATED
#define NEW_FREED_OFFSET (MAX_PERM_ALLOCATED + MAX_NEW_ALLOCATED)
static void* DefaultAllocFunc(void* opaque, size_t size) {
BROTLI_UNUSED(opaque);
return malloc(size);
}
static void DefaultFreeFunc(void* opaque, void* address) {
BROTLI_UNUSED(opaque);
free(address);
}
void BrotliInitMemoryManager(
MemoryManager* m, brotli_alloc_func alloc_func, brotli_free_func free_func,
void* opaque) {
if (!alloc_func) {
m->alloc_func = DefaultAllocFunc;
m->free_func = DefaultFreeFunc;
m->alloc_func = BrotliDefaultAllocFunc;
m->free_func = BrotliDefaultFreeFunc;
m->opaque = 0;
} else {
m->alloc_func = alloc_func;
@ -132,11 +121,11 @@ static void CollectGarbagePointers(MemoryManager* m) {
m->pointers + NEW_FREED_OFFSET, m->new_freed);
m->perm_allocated -= annihilated;
m->new_freed -= annihilated;
assert(m->new_freed == 0);
BROTLI_DCHECK(m->new_freed == 0);
}
if (m->new_allocated != 0) {
assert(m->perm_allocated + m->new_allocated <= MAX_PERM_ALLOCATED);
BROTLI_DCHECK(m->perm_allocated + m->new_allocated <= MAX_PERM_ALLOCATED);
memcpy(m->pointers + PERM_ALLOCATED_OFFSET + m->perm_allocated,
m->pointers + NEW_ALLOCATED_OFFSET,
sizeof(void*) * m->new_allocated);

46
BaseTools/Source/C/BrotliCompress/enc/memory.h
View File

@ -9,8 +9,10 @@
#ifndef BROTLI_ENC_MEMORY_H_
#define BROTLI_ENC_MEMORY_H_
#include "../common/types.h"
#include "./port.h"
#include <string.h> /* memcpy */
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -39,7 +41,8 @@ BROTLI_INTERNAL void BrotliInitMemoryManager(
void* opaque);
BROTLI_INTERNAL void* BrotliAllocate(MemoryManager* m, size_t n);
#define BROTLI_ALLOC(M, T, N) ((T*)BrotliAllocate((M), (N) * sizeof(T)))
#define BROTLI_ALLOC(M, T, N) \
((N) > 0 ? ((T*)BrotliAllocate((M), (N) * sizeof(T))) : NULL)
BROTLI_INTERNAL void BrotliFree(MemoryManager* m, void* p);
#define BROTLI_FREE(M, P) { \
@ -55,6 +58,43 @@ BROTLI_INTERNAL void BrotliFree(MemoryManager* m, void* p);
BROTLI_INTERNAL void BrotliWipeOutMemoryManager(MemoryManager* m);
/*
Dynamically grows array capacity to at least the requested size
M: MemoryManager
T: data type
A: array
C: capacity
R: requested size
*/
#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) { \
if (C < (R)) { \
size_t _new_size = (C == 0) ? (R) : C; \
T* new_array; \
while (_new_size < (R)) _new_size *= 2; \
new_array = BROTLI_ALLOC((M), T, _new_size); \
if (!BROTLI_IS_OOM(M) && C != 0) \
memcpy(new_array, A, C * sizeof(T)); \
BROTLI_FREE((M), A); \
A = new_array; \
C = _new_size; \
} \
}
/*
Appends value and dynamically grows array capacity when needed
M: MemoryManager
T: data type
A: array
C: array capacity
S: array size
V: value to append
*/
#define BROTLI_ENSURE_CAPACITY_APPEND(M, T, A, C, S, V) { \
(S)++; \
BROTLI_ENSURE_CAPACITY(M, T, A, C, S); \
A[(S) - 1] = (V); \
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

432
BaseTools/Source/C/BrotliCompress/enc/metablock.c
View File

@ -10,29 +10,131 @@
#include "./metablock.h"
#include "../common/constants.h"
#include "../common/types.h"
#include "../common/context.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./bit_cost.h"
#include "./block_splitter.h"
#include "./cluster.h"
#include "./context.h"
#include "./entropy_encode.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
void BrotliInitDistanceParams(BrotliEncoderParams* params,
uint32_t npostfix, uint32_t ndirect) {
BrotliDistanceParams* dist_params = &params->dist;
uint32_t alphabet_size, max_distance;
dist_params->distance_postfix_bits = npostfix;
dist_params->num_direct_distance_codes = ndirect;
alphabet_size = BROTLI_DISTANCE_ALPHABET_SIZE(
npostfix, ndirect, BROTLI_MAX_DISTANCE_BITS);
max_distance = ndirect + (1U << (BROTLI_MAX_DISTANCE_BITS + npostfix + 2)) -
(1U << (npostfix + 2));
if (params->large_window) {
static const uint32_t bound[BROTLI_MAX_NPOSTFIX + 1] = {0, 4, 12, 28};
uint32_t postfix = 1U << npostfix;
alphabet_size = BROTLI_DISTANCE_ALPHABET_SIZE(
npostfix, ndirect, BROTLI_LARGE_MAX_DISTANCE_BITS);
/* The maximum distance is set so that no distance symbol used can encode
a distance larger than BROTLI_MAX_ALLOWED_DISTANCE with all
its extra bits set. */
if (ndirect < bound[npostfix]) {
max_distance = BROTLI_MAX_ALLOWED_DISTANCE - (bound[npostfix] - ndirect);
} else if (ndirect >= bound[npostfix] + postfix) {
max_distance = (3U << 29) - 4 + (ndirect - bound[npostfix]);
} else {
max_distance = BROTLI_MAX_ALLOWED_DISTANCE;
}
}
dist_params->alphabet_size = alphabet_size;
dist_params->max_distance = max_distance;
}
static void RecomputeDistancePrefixes(Command* cmds,
size_t num_commands,
const BrotliDistanceParams* orig_params,
const BrotliDistanceParams* new_params) {
size_t i;
if (orig_params->distance_postfix_bits == new_params->distance_postfix_bits &&
orig_params->num_direct_distance_codes ==
new_params->num_direct_distance_codes) {
return;
}
for (i = 0; i < num_commands; ++i) {
Command* cmd = &cmds[i];
if (CommandCopyLen(cmd) && cmd->cmd_prefix_ >= 128) {
PrefixEncodeCopyDistance(CommandRestoreDistanceCode(cmd, orig_params),
new_params->num_direct_distance_codes,
new_params->distance_postfix_bits,
&cmd->dist_prefix_,
&cmd->dist_extra_);
}
}
}
static BROTLI_BOOL ComputeDistanceCost(const Command* cmds,
size_t num_commands,
const BrotliDistanceParams* orig_params,
const BrotliDistanceParams* new_params,
double* cost) {
size_t i;
BROTLI_BOOL equal_params = BROTLI_FALSE;
uint16_t dist_prefix;
uint32_t dist_extra;
double extra_bits = 0.0;
HistogramDistance histo;
HistogramClearDistance(&histo);
if (orig_params->distance_postfix_bits == new_params->distance_postfix_bits &&
orig_params->num_direct_distance_codes ==
new_params->num_direct_distance_codes) {
equal_params = BROTLI_TRUE;
}
for (i = 0; i < num_commands; i++) {
const Command* cmd = &cmds[i];
if (CommandCopyLen(cmd) && cmd->cmd_prefix_ >= 128) {
if (equal_params) {
dist_prefix = cmd->dist_prefix_;
} else {
uint32_t distance = CommandRestoreDistanceCode(cmd, orig_params);
if (distance > new_params->max_distance) {
return BROTLI_FALSE;
}
PrefixEncodeCopyDistance(distance,
new_params->num_direct_distance_codes,
new_params->distance_postfix_bits,
&dist_prefix,
&dist_extra);
}
HistogramAddDistance(&histo, dist_prefix & 0x3FF);
extra_bits += dist_prefix >> 10;
}
}
*cost = BrotliPopulationCostDistance(&histo) + extra_bits;
return BROTLI_TRUE;
}
void BrotliBuildMetaBlock(MemoryManager* m,
const uint8_t* ringbuffer,
const size_t pos,
const size_t mask,
const BrotliEncoderParams* params,
BrotliEncoderParams* params,
uint8_t prev_byte,
uint8_t prev_byte2,
const Command* cmds,
Command* cmds,
size_t num_commands,
ContextType literal_context_mode,
MetaBlockSplit* mb) {
@ -40,10 +142,52 @@ void BrotliBuildMetaBlock(MemoryManager* m,
static const size_t kMaxNumberOfHistograms = 256;
HistogramDistance* distance_histograms;
HistogramLiteral* literal_histograms;
ContextType* literal_context_modes;
size_t num_literal_contexts;
size_t num_distance_contexts;
ContextType* literal_context_modes = NULL;
size_t literal_histograms_size;
size_t distance_histograms_size;
size_t i;
size_t literal_context_multiplier = 1;
uint32_t npostfix;
uint32_t ndirect_msb = 0;
BROTLI_BOOL check_orig = BROTLI_TRUE;
double best_dist_cost = 1e99;
BrotliEncoderParams orig_params = *params;
BrotliEncoderParams new_params = *params;
for (npostfix = 0; npostfix <= BROTLI_MAX_NPOSTFIX; npostfix++) {
for (; ndirect_msb < 16; ndirect_msb++) {
uint32_t ndirect = ndirect_msb << npostfix;
BROTLI_BOOL skip;
double dist_cost;
BrotliInitDistanceParams(&new_params, npostfix, ndirect);
if (npostfix == orig_params.dist.distance_postfix_bits &&
ndirect == orig_params.dist.num_direct_distance_codes) {
check_orig = BROTLI_FALSE;
}
skip = !ComputeDistanceCost(
cmds, num_commands,
&orig_params.dist, &new_params.dist, &dist_cost);
if (skip || (dist_cost > best_dist_cost)) {
break;
}
best_dist_cost = dist_cost;
params->dist = new_params.dist;
}
if (ndirect_msb > 0) ndirect_msb--;
ndirect_msb /= 2;
}
if (check_orig) {
double dist_cost;
ComputeDistanceCost(cmds, num_commands,
&orig_params.dist, &orig_params.dist, &dist_cost);
if (dist_cost < best_dist_cost) {
/* NB: currently unused; uncomment when more param tuning is added. */
/* best_dist_cost = dist_cost; */
params->dist = orig_params.dist;
}
}
RecomputeDistancePrefixes(cmds, num_commands,
&orig_params.dist, &params->dist);
BrotliSplitBlock(m, cmds, num_commands,
ringbuffer, pos, mask, params,
@ -52,68 +196,87 @@ void BrotliBuildMetaBlock(MemoryManager* m,
&mb->distance_split);
if (BROTLI_IS_OOM(m)) return;
literal_context_modes =
BROTLI_ALLOC(m, ContextType, mb->literal_split.num_types);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < mb->literal_split.num_types; ++i) {
literal_context_modes[i] = literal_context_mode;
if (!params->disable_literal_context_modeling) {
literal_context_multiplier = 1 << BROTLI_LITERAL_CONTEXT_BITS;
literal_context_modes =
BROTLI_ALLOC(m, ContextType, mb->literal_split.num_types);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < mb->literal_split.num_types; ++i) {
literal_context_modes[i] = literal_context_mode;
}
}
num_literal_contexts =
mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
num_distance_contexts =
mb->distance_split.num_types << BROTLI_DISTANCE_CONTEXT_BITS;
literal_histograms = BROTLI_ALLOC(m, HistogramLiteral, num_literal_contexts);
literal_histograms_size =
mb->literal_split.num_types * literal_context_multiplier;
literal_histograms =
BROTLI_ALLOC(m, HistogramLiteral, literal_histograms_size);
if (BROTLI_IS_OOM(m)) return;
ClearHistogramsLiteral(literal_histograms, num_literal_contexts);
ClearHistogramsLiteral(literal_histograms, literal_histograms_size);
assert(mb->command_histograms == 0);
distance_histograms_size =
mb->distance_split.num_types << BROTLI_DISTANCE_CONTEXT_BITS;
distance_histograms =
BROTLI_ALLOC(m, HistogramDistance, distance_histograms_size);
if (BROTLI_IS_OOM(m)) return;
ClearHistogramsDistance(distance_histograms, distance_histograms_size);
BROTLI_DCHECK(mb->command_histograms == 0);
mb->command_histograms_size = mb->command_split.num_types;
mb->command_histograms =
BROTLI_ALLOC(m, HistogramCommand, mb->command_histograms_size);
if (BROTLI_IS_OOM(m)) return;
ClearHistogramsCommand(mb->command_histograms, mb->command_histograms_size);
distance_histograms =
BROTLI_ALLOC(m, HistogramDistance, num_distance_contexts);
if (BROTLI_IS_OOM(m)) return;
ClearHistogramsDistance(distance_histograms, num_distance_contexts);
BrotliBuildHistogramsWithContext(cmds, num_commands,
&mb->literal_split, &mb->command_split, &mb->distance_split,
ringbuffer, pos, mask, prev_byte, prev_byte2, literal_context_modes,
literal_histograms, mb->command_histograms, distance_histograms);
BROTLI_FREE(m, literal_context_modes);
assert(mb->literal_context_map == 0);
BROTLI_DCHECK(mb->literal_context_map == 0);
mb->literal_context_map_size =
mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
mb->literal_context_map =
BROTLI_ALLOC(m, uint32_t, mb->literal_context_map_size);
if (BROTLI_IS_OOM(m)) return;
assert(mb->literal_histograms == 0);
BROTLI_DCHECK(mb->literal_histograms == 0);
mb->literal_histograms_size = mb->literal_context_map_size;
mb->literal_histograms =
BROTLI_ALLOC(m, HistogramLiteral, mb->literal_histograms_size);
if (BROTLI_IS_OOM(m)) return;
BrotliClusterHistogramsLiteral(m, literal_histograms,
mb->literal_context_map_size,
kMaxNumberOfHistograms,
mb->literal_histograms,
&mb->literal_histograms_size,
mb->literal_context_map);
BrotliClusterHistogramsLiteral(m, literal_histograms, literal_histograms_size,
kMaxNumberOfHistograms, mb->literal_histograms,
&mb->literal_histograms_size, mb->literal_context_map);
if (BROTLI_IS_OOM(m)) return;
BROTLI_FREE(m, literal_histograms);
assert(mb->distance_context_map == 0);
if (params->disable_literal_context_modeling) {
/* Distribute assignment to all contexts. */
for (i = mb->literal_split.num_types; i != 0;) {
size_t j = 0;
i--;
for (; j < (1 << BROTLI_LITERAL_CONTEXT_BITS); j++) {
mb->literal_context_map[(i << BROTLI_LITERAL_CONTEXT_BITS) + j] =
mb->literal_context_map[i];
}
}
}
BROTLI_DCHECK(mb->distance_context_map == 0);
mb->distance_context_map_size =
mb->distance_split.num_types << BROTLI_DISTANCE_CONTEXT_BITS;
mb->distance_context_map =
BROTLI_ALLOC(m, uint32_t, mb->distance_context_map_size);
if (BROTLI_IS_OOM(m)) return;
assert(mb->distance_histograms == 0);
BROTLI_DCHECK(mb->distance_histograms == 0);
mb->distance_histograms_size = mb->distance_context_map_size;
mb->distance_histograms =
BROTLI_ALLOC(m, HistogramDistance, mb->distance_histograms_size);
if (BROTLI_IS_OOM(m)) return;
BrotliClusterHistogramsDistance(m, distance_histograms,
mb->distance_context_map_size,
kMaxNumberOfHistograms,
@ -136,53 +299,7 @@ void BrotliBuildMetaBlock(MemoryManager* m,
#include "./metablock_inc.h" /* NOLINT(build/include) */
#undef FN
void BrotliBuildMetaBlockGreedy(MemoryManager* m,
const uint8_t* ringbuffer,
size_t pos,
size_t mask,
const Command *commands,
size_t n_commands,
MetaBlockSplit* mb) {
BlockSplitterLiteral lit_blocks;
BlockSplitterCommand cmd_blocks;
BlockSplitterDistance dist_blocks;
size_t num_literals = 0;
size_t i;
for (i = 0; i < n_commands; ++i) {
num_literals += commands[i].insert_len_;
}
InitBlockSplitterLiteral(m, &lit_blocks, 256, 512, 400.0, num_literals,
&mb->literal_split, &mb->literal_histograms,
&mb->literal_histograms_size);
if (BROTLI_IS_OOM(m)) return;
InitBlockSplitterCommand(m, &cmd_blocks, BROTLI_NUM_COMMAND_SYMBOLS, 1024,
500.0, n_commands, &mb->command_split, &mb->command_histograms,
&mb->command_histograms_size);
if (BROTLI_IS_OOM(m)) return;
InitBlockSplitterDistance(m, &dist_blocks, 64, 512, 100.0, n_commands,
&mb->distance_split, &mb->distance_histograms,
&mb->distance_histograms_size);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < n_commands; ++i) {
const Command cmd = commands[i];
size_t j;
BlockSplitterAddSymbolCommand(&cmd_blocks, cmd.cmd_prefix_);
for (j = cmd.insert_len_; j != 0; --j) {
BlockSplitterAddSymbolLiteral(&lit_blocks, ringbuffer[pos & mask]);
++pos;
}
pos += CommandCopyLen(&cmd);
if (CommandCopyLen(&cmd) && cmd.cmd_prefix_ >= 128) {
BlockSplitterAddSymbolDistance(&dist_blocks, cmd.dist_prefix_);
}
}
BlockSplitterFinishBlockLiteral(&lit_blocks, /* is_final = */ BROTLI_TRUE);
BlockSplitterFinishBlockCommand(&cmd_blocks, /* is_final = */ BROTLI_TRUE);
BlockSplitterFinishBlockDistance(&dist_blocks, /* is_final = */ BROTLI_TRUE);
}
#define BROTLI_MAX_STATIC_CONTEXTS 13
/* Greedy block splitter for one block category (literal, command or distance).
Gathers histograms for all context buckets. */
@ -214,7 +331,7 @@ typedef struct ContextBlockSplitter {
/* Offset of the histograms of the previous two block types. */
size_t last_histogram_ix_[2];
/* Entropy of the previous two block types. */
double* last_entropy_;
double last_entropy_[2 * BROTLI_MAX_STATIC_CONTEXTS];
/* The number of times we merged the current block with the last one. */
size_t merge_last_count_;
} ContextBlockSplitter;
@ -226,6 +343,7 @@ static void InitContextBlockSplitter(
size_t* histograms_size) {
size_t max_num_blocks = num_symbols / min_block_size + 1;
size_t max_num_types;
BROTLI_DCHECK(num_contexts <= BROTLI_MAX_STATIC_CONTEXTS);
self->alphabet_size_ = alphabet_size;
self->num_contexts_ = num_contexts;
@ -250,29 +368,23 @@ static void InitContextBlockSplitter(
split->lengths, split->lengths_alloc_size, max_num_blocks);
if (BROTLI_IS_OOM(m)) return;
split->num_blocks = max_num_blocks;
self->last_entropy_ = BROTLI_ALLOC(m, double, 2 * num_contexts);
if (BROTLI_IS_OOM(m)) return;
assert(*histograms == 0);
BROTLI_DCHECK(*histograms == 0);
*histograms_size = max_num_types * num_contexts;
*histograms = BROTLI_ALLOC(m, HistogramLiteral, *histograms_size);
self->histograms_ = *histograms;
if (BROTLI_IS_OOM(m)) return;
/* Clear only current historgram. */
/* Clear only current histogram. */
ClearHistogramsLiteral(&self->histograms_[0], num_contexts);
self->last_histogram_ix_[0] = self->last_histogram_ix_[1] = 0;
}
static void CleanupContextBlockSplitter(
MemoryManager* m, ContextBlockSplitter* self) {
BROTLI_FREE(m, self->last_entropy_);
}
/* Does either of three things:
(1) emits the current block with a new block type;
(2) emits the current block with the type of the second last block;
(3) merges the current block with the last block. */
static void ContextBlockSplitterFinishBlock(
MemoryManager* m, ContextBlockSplitter* self, BROTLI_BOOL is_final) {
ContextBlockSplitter* self, MemoryManager* m, BROTLI_BOOL is_final) {
BlockSplit* split = self->split_;
const size_t num_contexts = self->num_contexts_;
double* last_entropy = self->last_entropy_;
@ -305,10 +417,10 @@ static void ContextBlockSplitterFinishBlock(
respective set of histograms for the last and second last block types.
Decide over the split based on the total reduction of entropy across
all contexts. */
double* entropy = BROTLI_ALLOC(m, double, num_contexts);
double entropy[BROTLI_MAX_STATIC_CONTEXTS];
HistogramLiteral* combined_histo =
BROTLI_ALLOC(m, HistogramLiteral, 2 * num_contexts);
double* combined_entropy = BROTLI_ALLOC(m, double, 2 * num_contexts);
double combined_entropy[2 * BROTLI_MAX_STATIC_CONTEXTS];
double diff[2] = { 0.0 };
size_t i;
if (BROTLI_IS_OOM(m)) return;
@ -383,9 +495,7 @@ static void ContextBlockSplitterFinishBlock(
self->target_block_size_ += self->min_block_size_;
}
}
BROTLI_FREE(m, combined_entropy);
BROTLI_FREE(m, combined_histo);
BROTLI_FREE(m, entropy);
}
if (is_final) {
*self->histograms_size_ = split->num_types * num_contexts;
@ -395,30 +505,49 @@ static void ContextBlockSplitterFinishBlock(
/* Adds the next symbol to the current block type and context. When the
current block reaches the target size, decides on merging the block. */
static void ContextBlockSplitterAddSymbol(MemoryManager* m,
ContextBlockSplitter* self, size_t symbol, size_t context) {
static void ContextBlockSplitterAddSymbol(
ContextBlockSplitter* self, MemoryManager* m,
size_t symbol, size_t context) {
HistogramAddLiteral(&self->histograms_[self->curr_histogram_ix_ + context],
symbol);
++self->block_size_;
if (self->block_size_ == self->target_block_size_) {
ContextBlockSplitterFinishBlock(m, self, /* is_final = */ BROTLI_FALSE);
ContextBlockSplitterFinishBlock(self, m, /* is_final = */ BROTLI_FALSE);
if (BROTLI_IS_OOM(m)) return;
}
}
void BrotliBuildMetaBlockGreedyWithContexts(MemoryManager* m,
const uint8_t* ringbuffer,
size_t pos,
size_t mask,
uint8_t prev_byte,
uint8_t prev_byte2,
ContextType literal_context_mode,
size_t num_contexts,
const uint32_t* static_context_map,
const Command *commands,
size_t n_commands,
MetaBlockSplit* mb) {
ContextBlockSplitter lit_blocks;
static void MapStaticContexts(MemoryManager* m,
size_t num_contexts,
const uint32_t* static_context_map,
MetaBlockSplit* mb) {
size_t i;
BROTLI_DCHECK(mb->literal_context_map == 0);
mb->literal_context_map_size =
mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
mb->literal_context_map =
BROTLI_ALLOC(m, uint32_t, mb->literal_context_map_size);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < mb->literal_split.num_types; ++i) {
uint32_t offset = (uint32_t)(i * num_contexts);
size_t j;
for (j = 0; j < (1u << BROTLI_LITERAL_CONTEXT_BITS); ++j) {
mb->literal_context_map[(i << BROTLI_LITERAL_CONTEXT_BITS) + j] =
offset + static_context_map[j];
}
}
}
static BROTLI_INLINE void BrotliBuildMetaBlockGreedyInternal(
MemoryManager* m, const uint8_t* ringbuffer, size_t pos, size_t mask,
uint8_t prev_byte, uint8_t prev_byte2, ContextLut literal_context_lut,
const size_t num_contexts, const uint32_t* static_context_map,
const Command* commands, size_t n_commands, MetaBlockSplit* mb) {
union {
BlockSplitterLiteral plain;
ContextBlockSplitter ctx;
} lit_blocks;
BlockSplitterCommand cmd_blocks;
BlockSplitterDistance dist_blocks;
size_t num_literals = 0;
@ -427,9 +556,15 @@ void BrotliBuildMetaBlockGreedyWithContexts(MemoryManager* m,
num_literals += commands[i].insert_len_;
}
InitContextBlockSplitter(m, &lit_blocks, 256, num_contexts, 512, 400.0,
num_literals, &mb->literal_split, &mb->literal_histograms,
&mb->literal_histograms_size);
if (num_contexts == 1) {
InitBlockSplitterLiteral(m, &lit_blocks.plain, 256, 512, 400.0,
num_literals, &mb->literal_split, &mb->literal_histograms,
&mb->literal_histograms_size);
} else {
InitContextBlockSplitter(m, &lit_blocks.ctx, 256, num_contexts, 512, 400.0,
num_literals, &mb->literal_split, &mb->literal_histograms,
&mb->literal_histograms_size);
}
if (BROTLI_IS_OOM(m)) return;
InitBlockSplitterCommand(m, &cmd_blocks, BROTLI_NUM_COMMAND_SYMBOLS, 1024,
500.0, n_commands, &mb->command_split, &mb->command_histograms,
@ -445,12 +580,17 @@ void BrotliBuildMetaBlockGreedyWithContexts(MemoryManager* m,
size_t j;
BlockSplitterAddSymbolCommand(&cmd_blocks, cmd.cmd_prefix_);
for (j = cmd.insert_len_; j != 0; --j) {
size_t context = Context(prev_byte, prev_byte2, literal_context_mode);
uint8_t literal = ringbuffer[pos & mask];
ContextBlockSplitterAddSymbol(
m, &lit_blocks, literal, static_context_map[context]);
if (num_contexts == 1) {
BlockSplitterAddSymbolLiteral(&lit_blocks.plain, literal);
} else {
size_t context =
BROTLI_CONTEXT(prev_byte, prev_byte2, literal_context_lut);
ContextBlockSplitterAddSymbol(&lit_blocks.ctx, m, literal,
static_context_map[context]);
if (BROTLI_IS_OOM(m)) return;
}
prev_byte2 = prev_byte;
if (BROTLI_IS_OOM(m)) return;
prev_byte = literal;
++pos;
}
@ -459,38 +599,52 @@ void BrotliBuildMetaBlockGreedyWithContexts(MemoryManager* m,
prev_byte2 = ringbuffer[(pos - 2) & mask];
prev_byte = ringbuffer[(pos - 1) & mask];
if (cmd.cmd_prefix_ >= 128) {
BlockSplitterAddSymbolDistance(&dist_blocks, cmd.dist_prefix_);
BlockSplitterAddSymbolDistance(&dist_blocks, cmd.dist_prefix_ & 0x3FF);
}
}
}
ContextBlockSplitterFinishBlock(m, &lit_blocks, /* is_final = */ BROTLI_TRUE);
if (BROTLI_IS_OOM(m)) return;
CleanupContextBlockSplitter(m, &lit_blocks);
if (num_contexts == 1) {
BlockSplitterFinishBlockLiteral(
&lit_blocks.plain, /* is_final = */ BROTLI_TRUE);
} else {
ContextBlockSplitterFinishBlock(
&lit_blocks.ctx, m, /* is_final = */ BROTLI_TRUE);
if (BROTLI_IS_OOM(m)) return;
}
BlockSplitterFinishBlockCommand(&cmd_blocks, /* is_final = */ BROTLI_TRUE);
BlockSplitterFinishBlockDistance(&dist_blocks, /* is_final = */ BROTLI_TRUE);
assert(mb->literal_context_map == 0);
mb->literal_context_map_size =
mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
mb->literal_context_map =
BROTLI_ALLOC(m, uint32_t, mb->literal_context_map_size);
if (BROTLI_IS_OOM(m)) return;
for (i = 0; i < mb->literal_split.num_types; ++i) {
size_t j;
for (j = 0; j < (1u << BROTLI_LITERAL_CONTEXT_BITS); ++j) {
mb->literal_context_map[(i << BROTLI_LITERAL_CONTEXT_BITS) + j] =
(uint32_t)(i * num_contexts) + static_context_map[j];
}
if (num_contexts > 1) {
MapStaticContexts(m, num_contexts, static_context_map, mb);
}
}
void BrotliOptimizeHistograms(size_t num_direct_distance_codes,
size_t distance_postfix_bits,
void BrotliBuildMetaBlockGreedy(MemoryManager* m,
const uint8_t* ringbuffer,
size_t pos,
size_t mask,
uint8_t prev_byte,
uint8_t prev_byte2,
ContextLut literal_context_lut,
size_t num_contexts,
const uint32_t* static_context_map,
const Command* commands,
size_t n_commands,
MetaBlockSplit* mb) {
if (num_contexts == 1) {
BrotliBuildMetaBlockGreedyInternal(m, ringbuffer, pos, mask, prev_byte,
prev_byte2, literal_context_lut, 1, NULL, commands, n_commands, mb);
} else {
BrotliBuildMetaBlockGreedyInternal(m, ringbuffer, pos, mask, prev_byte,
prev_byte2, literal_context_lut, num_contexts, static_context_map,
commands, n_commands, mb);
}
}
void BrotliOptimizeHistograms(uint32_t num_distance_codes,
MetaBlockSplit* mb) {
uint8_t good_for_rle[BROTLI_NUM_COMMAND_SYMBOLS];
size_t num_distance_codes;
size_t i;
for (i = 0; i < mb->literal_histograms_size; ++i) {
BrotliOptimizeHuffmanCountsForRle(256, mb->literal_histograms[i].data_,
@ -501,8 +655,6 @@ void BrotliOptimizeHistograms(size_t num_direct_distance_codes,
mb->command_histograms[i].data_,
good_for_rle);
}
num_distance_codes = BROTLI_NUM_DISTANCE_SHORT_CODES +
num_direct_distance_codes + (48u << distance_postfix_bits);
for (i = 0; i < mb->distance_histograms_size; ++i) {
BrotliOptimizeHuffmanCountsForRle(num_distance_codes,
mb->distance_histograms[i].data_,

35
BaseTools/Source/C/BrotliCompress/enc/metablock.h
View File

@ -10,13 +10,13 @@
#ifndef BROTLI_ENC_METABLOCK_H_
#define BROTLI_ENC_METABLOCK_H_
#include "../common/types.h"
#include "../common/context.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./block_splitter.h"
#include "./command.h"
#include "./context.h"
#include "./histogram.h"
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -67,42 +67,37 @@ static BROTLI_INLINE void DestroyMetaBlockSplit(
BROTLI_FREE(m, mb->distance_histograms);
}
/* Uses the slow shortest-path block splitter and does context clustering. */
/* Uses the slow shortest-path block splitter and does context clustering.
The distance parameters are dynamically selected based on the commands
which get recomputed under the new distance parameters. The new distance
parameters are stored into *params. */
BROTLI_INTERNAL void BrotliBuildMetaBlock(MemoryManager* m,
const uint8_t* ringbuffer,
const size_t pos,
const size_t mask,
const BrotliEncoderParams* params,
BrotliEncoderParams* params,
uint8_t prev_byte,
uint8_t prev_byte2,
const Command* cmds,
Command* cmds,
size_t num_commands,
ContextType literal_context_mode,
MetaBlockSplit* mb);
/* Uses a fast greedy block splitter that tries to merge current block with the
last or the second last block and does not do any context modeling. */
BROTLI_INTERNAL void BrotliBuildMetaBlockGreedy(MemoryManager* m,
const uint8_t* ringbuffer,
size_t pos,
size_t mask,
const Command* commands,
size_t n_commands,
MetaBlockSplit* mb);
/* Uses a fast greedy block splitter that tries to merge current block with the
last or the second last block and uses a static context clustering which
is the same for all block types. */
BROTLI_INTERNAL void BrotliBuildMetaBlockGreedyWithContexts(
BROTLI_INTERNAL void BrotliBuildMetaBlockGreedy(
MemoryManager* m, const uint8_t* ringbuffer, size_t pos, size_t mask,
uint8_t prev_byte, uint8_t prev_byte2, ContextType literal_context_mode,
uint8_t prev_byte, uint8_t prev_byte2, ContextLut literal_context_lut,
size_t num_contexts, const uint32_t* static_context_map,
const Command* commands, size_t n_commands, MetaBlockSplit* mb);
BROTLI_INTERNAL void BrotliOptimizeHistograms(size_t num_direct_distance_codes,
size_t distance_postfix_bits,
BROTLI_INTERNAL void BrotliOptimizeHistograms(uint32_t num_distance_codes,
MetaBlockSplit* mb);
BROTLI_INTERNAL void BrotliInitDistanceParams(BrotliEncoderParams* params,
uint32_t npostfix, uint32_t ndirect);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif

2
BaseTools/Source/C/BrotliCompress/enc/metablock_inc.h
View File

@ -67,7 +67,7 @@ static void FN(InitBlockSplitter)(
split->lengths, split->lengths_alloc_size, max_num_blocks);
if (BROTLI_IS_OOM(m)) return;
self->split_->num_blocks = max_num_blocks;
assert(*histograms == 0);
BROTLI_DCHECK(*histograms == 0);
*histograms_size = max_num_types;
*histograms = BROTLI_ALLOC(m, HistogramType, *histograms_size);
self->histograms_ = *histograms;

44
BaseTools/Source/C/BrotliCompress/enc/params.h Normal file
View File

@ -0,0 +1,44 @@
/* Copyright 2017 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Parameters for the Brotli encoder with chosen quality levels. */
#ifndef BROTLI_ENC_PARAMS_H_
#define BROTLI_ENC_PARAMS_H_
#include <brotli/encode.h>
#include "./encoder_dict.h"
typedef struct BrotliHasherParams {
int type;
int bucket_bits;
int block_bits;
int hash_len;
int num_last_distances_to_check;
} BrotliHasherParams;
typedef struct BrotliDistanceParams {
uint32_t distance_postfix_bits;
uint32_t num_direct_distance_codes;
uint32_t alphabet_size;
size_t max_distance;
} BrotliDistanceParams;
/* Encoding parameters */
typedef struct BrotliEncoderParams {
BrotliEncoderMode mode;
int quality;
int lgwin;
int lgblock;
size_t size_hint;
BROTLI_BOOL disable_literal_context_modeling;
BROTLI_BOOL large_window;
BrotliHasherParams hasher;
BrotliDistanceParams dist;
BrotliEncoderDictionary dictionary;
} BrotliEncoderParams;
#endif /* BROTLI_ENC_PARAMS_H_ */

168
BaseTools/Source/C/BrotliCompress/enc/port.h
View File

@ -1,168 +0,0 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for endianness, branch prediction and unaligned loads and stores. */
#ifndef BROTLI_ENC_PORT_H_
#define BROTLI_ENC_PORT_H_
#include <assert.h>
#include <string.h> /* memcpy */
#include "../common/port.h"
#include "../common/types.h"
#if defined OS_LINUX || defined OS_CYGWIN
#include <endian.h>
#elif defined OS_FREEBSD
#include <machine/endian.h>
#elif defined OS_MACOSX
#include <machine/endian.h>
/* Let's try and follow the Linux convention */
#define __BYTE_ORDER BYTE_ORDER
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#endif
/* define the macro IS_LITTLE_ENDIAN
using the above endian definitions from endian.h if
endian.h was included */
#ifdef __BYTE_ORDER
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define IS_LITTLE_ENDIAN
#endif
#else
#if defined(__LITTLE_ENDIAN__)
#define IS_LITTLE_ENDIAN
#endif
#endif /* __BYTE_ORDER */
#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define IS_LITTLE_ENDIAN
#endif
/* Enable little-endian optimization for x64 architecture on Windows. */
#if (defined(_WIN32) || defined(_WIN64)) && defined(_M_X64)
#define IS_LITTLE_ENDIAN
#endif
/* Portable handling of unaligned loads, stores, and copies.
On some platforms, like ARM, the copy functions can be more efficient
then a load and a store. */
#if defined(ARCH_PIII) || \
defined(ARCH_ATHLON) || defined(ARCH_K8) || defined(_ARCH_PPC)
/* x86 and x86-64 can perform unaligned loads/stores directly;
modern PowerPC hardware can also do unaligned integer loads and stores;
but note: the FPU still sends unaligned loads and stores to a trap handler!
*/
#define BROTLI_UNALIGNED_LOAD32(_p) (*(const uint32_t *)(_p))
#define BROTLI_UNALIGNED_LOAD64(_p) (*(const uint64_t *)(_p))
#define BROTLI_UNALIGNED_STORE32(_p, _val) \
(*(uint32_t *)(_p) = (_val))
#define BROTLI_UNALIGNED_STORE64(_p, _val) \
(*(uint64_t *)(_p) = (_val))
#elif defined(__arm__) && \
!defined(__ARM_ARCH_5__) && \
!defined(__ARM_ARCH_5T__) && \
!defined(__ARM_ARCH_5TE__) && \
!defined(__ARM_ARCH_5TEJ__) && \
!defined(__ARM_ARCH_6__) && \
!defined(__ARM_ARCH_6J__) && \
!defined(__ARM_ARCH_6K__) && \
!defined(__ARM_ARCH_6Z__) && \
!defined(__ARM_ARCH_6ZK__) && \
!defined(__ARM_ARCH_6T2__)
/* ARMv7 and newer support native unaligned accesses, but only of 16-bit
and 32-bit values (not 64-bit); older versions either raise a fatal signal,
do an unaligned read and rotate the words around a bit, or do the reads very
slowly (trip through kernel mode). */
#define BROTLI_UNALIGNED_LOAD32(_p) (*(const uint32_t *)(_p))
#define BROTLI_UNALIGNED_STORE32(_p, _val) \
(*(uint32_t *)(_p) = (_val))
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
uint64_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
memcpy(p, &v, sizeof v);
}
#else
/* These functions are provided for architectures that don't support */
/* unaligned loads and stores. */
static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32(const void *p) {
uint32_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
uint64_t t;
memcpy(&t, p, sizeof t);
return t;
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE32(void *p, uint32_t v) {
memcpy(p, &v, sizeof v);
}
static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
memcpy(p, &v, sizeof v);
}
#endif
#if !defined(__cplusplus) && !defined(c_plusplus) && __STDC_VERSION__ >= 199901L
#define BROTLI_RESTRICT restrict
#elif BROTLI_GCC_VERSION > 295 || defined(__llvm__)
#define BROTLI_RESTRICT __restrict
#else
#define BROTLI_RESTRICT
#endif
#define _TEMPLATE(T) \
static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \
static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; }
_TEMPLATE(double) _TEMPLATE(float) _TEMPLATE(int)
_TEMPLATE(size_t) _TEMPLATE(uint32_t) _TEMPLATE(uint8_t)
#undef _TEMPLATE
#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B)))
#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B)))
#define BROTLI_SWAP(T, A, I, J) { \
T __brotli_swap_tmp = (A)[(I)]; \
(A)[(I)] = (A)[(J)]; \
(A)[(J)] = __brotli_swap_tmp; \
}
#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) { \
if (C < (R)) { \
size_t _new_size = (C == 0) ? (R) : C; \
T* new_array; \
while (_new_size < (R)) _new_size *= 2; \
new_array = BROTLI_ALLOC((M), T, _new_size); \
if (!BROTLI_IS_OOM(m) && C != 0) \
memcpy(new_array, A, C * sizeof(T)); \
BROTLI_FREE((M), A); \
A = new_array; \
C = _new_size; \
} \
}
#endif /* BROTLI_ENC_PORT_H_ */

11
BaseTools/Source/C/BrotliCompress/enc/prefix.h
View File

@ -11,14 +11,16 @@
#define BROTLI_ENC_PREFIX_H_
#include "../common/constants.h"
#include "../common/port.h"
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./fast_log.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* Here distance_code is an intermediate code, i.e. one of the special codes or
the actual distance increased by BROTLI_NUM_DISTANCE_SHORT_CODES - 1. */
static BROTLI_INLINE void PrefixEncodeCopyDistance(size_t distance_code,
size_t num_direct_codes,
size_t postfix_bits,
@ -37,11 +39,10 @@ static BROTLI_INLINE void PrefixEncodeCopyDistance(size_t distance_code,
size_t prefix = (dist >> bucket) & 1;
size_t offset = (2 + prefix) << bucket;
size_t nbits = bucket - postfix_bits;
*code = (uint16_t)(
*code = (uint16_t)((nbits << 10) |
(BROTLI_NUM_DISTANCE_SHORT_CODES + num_direct_codes +
((2 * (nbits - 1) + prefix) << postfix_bits) + postfix));
*extra_bits = (uint32_t)(
(nbits << 24) | ((dist - offset) >> postfix_bits));
*extra_bits = (uint32_t)((dist - offset) >> postfix_bits);
}
}

91
BaseTools/Source/C/BrotliCompress/enc/quality.h
View File

@ -10,36 +10,29 @@
#ifndef BROTLI_ENC_QUALITY_H_
#define BROTLI_ENC_QUALITY_H_
#include "./encode.h"
#include "../common/platform.h"
#include <brotli/encode.h>
#include "./params.h"
#define FAST_ONE_PASS_COMPRESSION_QUALITY 0
#define FAST_TWO_PASS_COMPRESSION_QUALITY 1
#define ZOPFLIFICATION_QUALITY 10
#define HQ_ZOPFLIFICATION_QUALITY 11
#define MAX_QUALITY_FOR_STATIC_ENRTOPY_CODES 2
#define MAX_QUALITY_FOR_STATIC_ENTROPY_CODES 2
#define MIN_QUALITY_FOR_BLOCK_SPLIT 4
#define MIN_QUALITY_FOR_NONZERO_DISTANCE_PARAMS 4
#define MIN_QUALITY_FOR_OPTIMIZE_HISTOGRAMS 4
#define MIN_QUALITY_FOR_EXTENSIVE_REFERENCE_SEARCH 5
#define MIN_QUALITY_FOR_CONTEXT_MODELING 5
#define MIN_QUALITY_FOR_HQ_CONTEXT_MODELING 7
#define MIN_QUALITY_FOR_HQ_BLOCK_SPLITTING 10
/* Only for "font" mode. */
#define MIN_QUALITY_FOR_RECOMPUTE_DISTANCE_PREFIXES 10
/* For quality below MIN_QUALITY_FOR_BLOCK_SPLIT there is no block splitting,
so we buffer at most this much literals and commands. */
#define MAX_NUM_DELAYED_SYMBOLS 0x2fff
#define MAX_NUM_DELAYED_SYMBOLS 0x2FFF
/* Encoding parameters */
typedef struct BrotliEncoderParams {
BrotliEncoderMode mode;
int quality;
int lgwin;
int lgblock;
} BrotliEncoderParams;
/* Returns hashtable size for quality levels 0 and 1. */
/* Returns hash-table size for quality levels 0 and 1. */
static BROTLI_INLINE size_t MaxHashTableSize(int quality) {
return quality == FAST_ONE_PASS_COMPRESSION_QUALITY ? 1 << 15 : 1 << 17;
}
@ -48,13 +41,16 @@ static BROTLI_INLINE size_t MaxHashTableSize(int quality) {
#define MAX_ZOPFLI_LEN_QUALITY_10 150
#define MAX_ZOPFLI_LEN_QUALITY_11 325
/* Do not thoroughly search when a long copy is found. */
#define BROTLI_LONG_COPY_QUICK_STEP 16384
static BROTLI_INLINE size_t MaxZopfliLen(const BrotliEncoderParams* params) {
return params->quality <= 10 ?
MAX_ZOPFLI_LEN_QUALITY_10 :
MAX_ZOPFLI_LEN_QUALITY_11;
}
/* Number of best candidates to evaluate to expand zopfli chain. */
/* Number of best candidates to evaluate to expand Zopfli chain. */
static BROTLI_INLINE size_t MaxZopfliCandidates(
const BrotliEncoderParams* params) {
return params->quality <= 10 ? 1 : 5;
@ -63,10 +59,15 @@ static BROTLI_INLINE size_t MaxZopfliCandidates(
static BROTLI_INLINE void SanitizeParams(BrotliEncoderParams* params) {
params->quality = BROTLI_MIN(int, BROTLI_MAX_QUALITY,
BROTLI_MAX(int, BROTLI_MIN_QUALITY, params->quality));
if (params->lgwin < kBrotliMinWindowBits) {
params->lgwin = kBrotliMinWindowBits;
} else if (params->lgwin > kBrotliMaxWindowBits) {
params->lgwin = kBrotliMaxWindowBits;
if (params->quality <= MAX_QUALITY_FOR_STATIC_ENTROPY_CODES) {
params->large_window = BROTLI_FALSE;
}
if (params->lgwin < BROTLI_MIN_WINDOW_BITS) {
params->lgwin = BROTLI_MIN_WINDOW_BITS;
} else {
int max_lgwin = params->large_window ? BROTLI_LARGE_MAX_WINDOW_BITS :
BROTLI_MAX_WINDOW_BITS;
if (params->lgwin > max_lgwin) params->lgwin = max_lgwin;
}
}
@ -84,8 +85,8 @@ static BROTLI_INLINE int ComputeLgBlock(const BrotliEncoderParams* params) {
lgblock = BROTLI_MIN(int, 18, params->lgwin);
}
} else {
lgblock = BROTLI_MIN(int, kBrotliMaxInputBlockBits,
BROTLI_MAX(int, kBrotliMinInputBlockBits, lgblock));
lgblock = BROTLI_MIN(int, BROTLI_MAX_INPUT_BLOCK_BITS,
BROTLI_MAX(int, BROTLI_MIN_INPUT_BLOCK_BITS, lgblock));
}
return lgblock;
}
@ -94,14 +95,15 @@ static BROTLI_INLINE int ComputeLgBlock(const BrotliEncoderParams* params) {
Allocate at least lgwin + 1 bits for the ring buffer so that the newly
added block fits there completely and we still get lgwin bits and at least
read_block_size_bits + 1 bits because the copy tail length needs to be
smaller than ringbuffer size. */
smaller than ring-buffer size. */
static BROTLI_INLINE int ComputeRbBits(const BrotliEncoderParams* params) {
return 1 + BROTLI_MAX(int, params->lgwin, params->lgblock);
}
static BROTLI_INLINE size_t MaxMetablockSize(
const BrotliEncoderParams* params) {
int bits = BROTLI_MIN(int, ComputeRbBits(params), kBrotliMaxInputBlockBits);
int bits =
BROTLI_MIN(int, ComputeRbBits(params), BROTLI_MAX_INPUT_BLOCK_BITS);
return (size_t)1 << bits;
}
@ -116,15 +118,48 @@ static BROTLI_INLINE size_t LiteralSpreeLengthForSparseSearch(
return params->quality < 9 ? 64 : 512;
}
static BROTLI_INLINE int ChooseHasher(const BrotliEncoderParams* params) {
static BROTLI_INLINE void ChooseHasher(const BrotliEncoderParams* params,
BrotliHasherParams* hparams) {
if (params->quality > 9) {
return 10;
hparams->type = 10;
} else if (params->quality == 4 && params->size_hint >= (1 << 20)) {
hparams->type = 54;
} else if (params->quality < 5) {
return params->quality;
hparams->type = params->quality;
} else if (params->lgwin <= 16) {
return params->quality < 7 ? 40 : params->quality < 9 ? 41 : 42;
hparams->type = params->quality < 7 ? 40 : params->quality < 9 ? 41 : 42;
} else if (params->size_hint >= (1 << 20) && params->lgwin >= 19) {
hparams->type = 6;
hparams->block_bits = params->quality - 1;
hparams->bucket_bits = 15;
hparams->hash_len = 5;
hparams->num_last_distances_to_check =
params->quality < 7 ? 4 : params->quality < 9 ? 10 : 16;
} else {
hparams->type = 5;
hparams->block_bits = params->quality - 1;
hparams->bucket_bits = params->quality < 7 ? 14 : 15;
hparams->num_last_distances_to_check =
params->quality < 7 ? 4 : params->quality < 9 ? 10 : 16;
}
if (params->lgwin > 24) {
/* Different hashers for large window brotli: not for qualities <= 2,
these are too fast for large window. Not for qualities >= 10: their
hasher already works well with large window. So the changes are:
H3 --> H35: for quality 3.
H54 --> H55: for quality 4 with size hint > 1MB
H6 --> H65: for qualities 5, 6, 7, 8, 9. */
if (hparams->type == 3) {
hparams->type = 35;
}
if (hparams->type == 54) {
hparams->type = 55;
}
if (hparams->type == 6) {
hparams->type = 65;
}
}
return params->quality;
}
#endif /* BROTLI_ENC_QUALITY_H_ */

38
BaseTools/Source/C/BrotliCompress/enc/ringbuffer.h
View File

@ -11,9 +11,9 @@
#include <string.h> /* memcpy */
#include "../common/types.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./memory.h"
#include "./port.h"
#include "./quality.h"
#if defined(__cplusplus) || defined(c_plusplus)
@ -30,7 +30,7 @@ extern "C" {
buffer_[-1] == buffer_[(1 << window_bits) - 1] and
buffer_[-2] == buffer_[(1 << window_bits) - 2]. */
typedef struct RingBuffer {
/* Size of the ringbuffer is (1 << window_bits) + tail_size_. */
/* Size of the ring-buffer is (1 << window_bits) + tail_size_. */
const uint32_t size_;
const uint32_t mask_;
const uint32_t tail_size_;
@ -41,9 +41,9 @@ typedef struct RingBuffer {
uint32_t pos_;
/* The actual ring buffer containing the copy of the last two bytes, the data,
and the copy of the beginning as a tail. */
uint8_t *data_;
/* The start of the ringbuffer. */
uint8_t *buffer_;
uint8_t* data_;
/* The start of the ring-buffer. */
uint8_t* buffer_;
} RingBuffer;
static BROTLI_INLINE void RingBufferInit(RingBuffer* rb) {
@ -91,9 +91,9 @@ static BROTLI_INLINE void RingBufferInitBuffer(
}
static BROTLI_INLINE void RingBufferWriteTail(
const uint8_t *bytes, size_t n, RingBuffer* rb) {
const uint8_t* bytes, size_t n, RingBuffer* rb) {
const size_t masked_pos = rb->pos_ & rb->mask_;
if (PREDICT_FALSE(masked_pos < rb->tail_size_)) {
if (BROTLI_PREDICT_FALSE(masked_pos < rb->tail_size_)) {
/* Just fill the tail buffer with the beginning data. */
const size_t p = rb->size_ + masked_pos;
memcpy(&rb->buffer_[p], bytes,
@ -103,10 +103,10 @@ static BROTLI_INLINE void RingBufferWriteTail(
/* Push bytes into the ring buffer. */
static BROTLI_INLINE void RingBufferWrite(
MemoryManager* m, const uint8_t *bytes, size_t n, RingBuffer* rb) {
MemoryManager* m, const uint8_t* bytes, size_t n, RingBuffer* rb) {
if (rb->pos_ == 0 && n < rb->tail_size_) {
/* Special case for the first write: to process the first block, we don't
need to allocate the whole ringbuffer and we don't need the tail
need to allocate the whole ring-buffer and we don't need the tail
either. However, we do this memory usage optimization only if the
first write is less than the tail size, which is also the input block
size, otherwise it is likely that other blocks will follow and we
@ -131,7 +131,7 @@ static BROTLI_INLINE void RingBufferWrite(
/* The length of the writes is limited so that we do not need to worry
about a write */
RingBufferWriteTail(bytes, n, rb);
if (PREDICT_TRUE(masked_pos + n <= rb->size_)) {
if (BROTLI_PREDICT_TRUE(masked_pos + n <= rb->size_)) {
/* A single write fits. */
memcpy(&rb->buffer_[masked_pos], bytes, n);
} else {
@ -144,12 +144,16 @@ static BROTLI_INLINE void RingBufferWrite(
n - (rb->size_ - masked_pos));
}
}
rb->buffer_[-2] = rb->buffer_[rb->size_ - 2];
rb->buffer_[-1] = rb->buffer_[rb->size_ - 1];
rb->pos_ += (uint32_t)n;
if (rb->pos_ > (1u << 30)) {
/* Wrap, but preserve not-a-first-lap feature. */
rb->pos_ = (rb->pos_ & ((1u << 30) - 1)) | (1u << 30);
{
BROTLI_BOOL not_first_lap = (rb->pos_ & (1u << 31)) != 0;
uint32_t rb_pos_mask = (1u << 31) - 1;
rb->buffer_[-2] = rb->buffer_[rb->size_ - 2];
rb->buffer_[-1] = rb->buffer_[rb->size_ - 1];
rb->pos_ = (rb->pos_ & rb_pos_mask) + (uint32_t)(n & rb_pos_mask);
if (not_first_lap) {
/* Wrap, but preserve not-a-first-lap feature. */
rb->pos_ |= 1u << 31;
}
}
}

118
BaseTools/Source/C/BrotliCompress/enc/static_dict.c
View File

@ -7,21 +7,17 @@
#include "./static_dict.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include "../common/transform.h"
#include "./encoder_dict.h"
#include "./find_match_length.h"
#include "./port.h"
#include "./static_dict_lut.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static const uint8_t kUppercaseFirst = 10;
static const uint8_t kOmitLastNTransforms[10] = {
0, 12, 27, 23, 42, 63, 56, 48, 59, 64,
};
static BROTLI_INLINE uint32_t Hash(const uint8_t *data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32(data) * kDictHashMul32;
static BROTLI_INLINE uint32_t Hash(const uint8_t* data) {
uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kDictHashMul32;
/* The higher bits contain more mixture from the multiplication,
so we take our results from there. */
return h >> (32 - kDictNumBits);
@ -33,23 +29,24 @@ static BROTLI_INLINE void AddMatch(size_t distance, size_t len, size_t len_code,
matches[len] = BROTLI_MIN(uint32_t, matches[len], match);
}
static BROTLI_INLINE size_t DictMatchLength(const uint8_t* data,
static BROTLI_INLINE size_t DictMatchLength(const BrotliDictionary* dictionary,
const uint8_t* data,
size_t id,
size_t len,
size_t maxlen) {
const size_t offset = kBrotliDictionaryOffsetsByLength[len] + len * id;
return FindMatchLengthWithLimit(&kBrotliDictionary[offset], data,
const size_t offset = dictionary->offsets_by_length[len] + len * id;
return FindMatchLengthWithLimit(&dictionary->data[offset], data,
BROTLI_MIN(size_t, len, maxlen));
}
static BROTLI_INLINE BROTLI_BOOL IsMatch(
static BROTLI_INLINE BROTLI_BOOL IsMatch(const BrotliDictionary* dictionary,
DictWord w, const uint8_t* data, size_t max_length) {
if (w.len > max_length) {
return BROTLI_FALSE;
} else {
const size_t offset = kBrotliDictionaryOffsetsByLength[w.len] +
const size_t offset = dictionary->offsets_by_length[w.len] +
(size_t)w.len * (size_t)w.idx;
const uint8_t* dict = &kBrotliDictionary[offset];
const uint8_t* dict = &dictionary->data[offset];
if (w.transform == 0) {
/* Match against base dictionary word. */
return
@ -78,31 +75,33 @@ static BROTLI_INLINE BROTLI_BOOL IsMatch(
}
BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
const uint8_t* data, size_t min_length, size_t max_length,
uint32_t* matches) {
const BrotliEncoderDictionary* dictionary, const uint8_t* data,
size_t min_length, size_t max_length, uint32_t* matches) {
BROTLI_BOOL has_found_match = BROTLI_FALSE;
{
size_t offset = kStaticDictionaryBuckets[Hash(data)];
size_t offset = dictionary->buckets[Hash(data)];
BROTLI_BOOL end = !offset;
while (!end) {
DictWord w = kStaticDictionaryWords[offset++];
const size_t l = w.len & 0x7F;
const size_t n = (size_t)1 << kBrotliDictionarySizeBitsByLength[l];
DictWord w = dictionary->dict_words[offset++];
const size_t l = w.len & 0x1F;
const size_t n = (size_t)1 << dictionary->words->size_bits_by_length[l];
const size_t id = w.idx;
end = !!(w.len & 0x80);
w.len = (uint8_t)l;
if (w.transform == 0) {
const size_t matchlen = DictMatchLength(data, id, l, max_length);
const size_t matchlen =
DictMatchLength(dictionary->words, data, id, l, max_length);
const uint8_t* s;
size_t minlen;
size_t maxlen;
size_t len;
/* Transform "" + kIdentity + "" */
/* Transform "" + BROTLI_TRANSFORM_IDENTITY + "" */
if (matchlen == l) {
AddMatch(id, l, l, matches);
has_found_match = BROTLI_TRUE;
}
/* Transforms "" + kOmitLast1 + "" and "" + kOmitLast1 + "ing " */
/* Transforms "" + BROTLI_TRANSFORM_OMIT_LAST_1 + "" and
"" + BROTLI_TRANSFORM_OMIT_LAST_1 + "ing " */
if (matchlen >= l - 1) {
AddMatch(id + 12 * n, l - 1, l, matches);
if (l + 2 < max_length &&
@ -112,19 +111,22 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
}
has_found_match = BROTLI_TRUE;
}
/* Transform "" + kOmitLastN + "" (N = 2 .. 9) */
/* Transform "" + BROTLI_TRANSFORM_OMIT_LAST_# + "" (# = 2 .. 9) */
minlen = min_length;
if (l > 9) minlen = BROTLI_MAX(size_t, minlen, l - 9);
maxlen = BROTLI_MIN(size_t, matchlen, l - 2);
for (len = minlen; len <= maxlen; ++len) {
AddMatch(id + kOmitLastNTransforms[l - len] * n, len, l, matches);
size_t cut = l - len;
size_t transform_id = (cut << 2) +
(size_t)((dictionary->cutoffTransforms >> (cut * 6)) & 0x3F);
AddMatch(id + transform_id * n, len, l, matches);
has_found_match = BROTLI_TRUE;
}
if (matchlen < l || l + 6 >= max_length) {
continue;
}
s = &data[l];
/* Transforms "" + kIdentity + <suffix> */
/* Transforms "" + BROTLI_TRANSFORM_IDENTITY + <suffix> */
if (s[0] == ' ') {
AddMatch(id + n, l + 1, l, matches);
if (s[1] == 'a') {
@ -271,12 +273,13 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
}
}
} else {
/* Set is_all_caps=0 for kUppercaseFirst and
is_all_caps=1 otherwise (kUppercaseAll) transform. */
/* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and
is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL)
transform. */
const BROTLI_BOOL is_all_caps =
TO_BROTLI_BOOL(w.transform != kUppercaseFirst);
TO_BROTLI_BOOL(w.transform != BROTLI_TRANSFORM_UPPERCASE_FIRST);
const uint8_t* s;
if (!IsMatch(w, data, max_length)) {
if (!IsMatch(dictionary->words, w, data, max_length)) {
continue;
}
/* Transform "" + kUppercase{First,All} + "" */
@ -321,27 +324,29 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
/* Transforms with prefixes " " and "." */
if (max_length >= 5 && (data[0] == ' ' || data[0] == '.')) {
BROTLI_BOOL is_space = TO_BROTLI_BOOL(data[0] == ' ');
size_t offset = kStaticDictionaryBuckets[Hash(&data[1])];
size_t offset = dictionary->buckets[Hash(&data[1])];
BROTLI_BOOL end = !offset;
while (!end) {
DictWord w = kStaticDictionaryWords[offset++];
const size_t l = w.len & 0x7F;
const size_t n = (size_t)1 << kBrotliDictionarySizeBitsByLength[l];
DictWord w = dictionary->dict_words[offset++];
const size_t l = w.len & 0x1F;
const size_t n = (size_t)1 << dictionary->words->size_bits_by_length[l];
const size_t id = w.idx;
end = !!(w.len & 0x80);
w.len = (uint8_t)l;
if (w.transform == 0) {
const uint8_t* s;
if (!IsMatch(w, &data[1], max_length - 1)) {
if (!IsMatch(dictionary->words, w, &data[1], max_length - 1)) {
continue;
}
/* Transforms " " + kIdentity + "" and "." + kIdentity + "" */
/* Transforms " " + BROTLI_TRANSFORM_IDENTITY + "" and
"." + BROTLI_TRANSFORM_IDENTITY + "" */
AddMatch(id + (is_space ? 6 : 32) * n, l + 1, l, matches);
has_found_match = BROTLI_TRUE;
if (l + 2 >= max_length) {
continue;
}
/* Transforms " " + kIdentity + <suffix> and "." + kIdentity + <suffix>
/* Transforms " " + BROTLI_TRANSFORM_IDENTITY + <suffix> and
"." + BROTLI_TRANSFORM_IDENTITY + <suffix>
*/
s = &data[l + 1];
if (s[0] == ' ') {
@ -368,12 +373,13 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
}
}
} else if (is_space) {
/* Set is_all_caps=0 for kUppercaseFirst and
is_all_caps=1 otherwise (kUppercaseAll) transform. */
/* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and
is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL)
transform. */
const BROTLI_BOOL is_all_caps =
TO_BROTLI_BOOL(w.transform != kUppercaseFirst);
TO_BROTLI_BOOL(w.transform != BROTLI_TRANSFORM_UPPERCASE_FIRST);
const uint8_t* s;
if (!IsMatch(w, &data[1], max_length - 1)) {
if (!IsMatch(dictionary->words, w, &data[1], max_length - 1)) {
continue;
}
/* Transforms " " + kUppercase{First,All} + "" */
@ -409,21 +415,22 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
}
}
if (max_length >= 6) {
/* Transforms with prefixes "e ", "s ", ", " and "\xc2\xa0" */
/* Transforms with prefixes "e ", "s ", ", " and "\xC2\xA0" */
if ((data[1] == ' ' &&
(data[0] == 'e' || data[0] == 's' || data[0] == ',')) ||
(data[0] == 0xc2 && data[1] == 0xa0)) {
size_t offset = kStaticDictionaryBuckets[Hash(&data[2])];
(data[0] == 0xC2 && data[1] == 0xA0)) {
size_t offset = dictionary->buckets[Hash(&data[2])];
BROTLI_BOOL end = !offset;
while (!end) {
DictWord w = kStaticDictionaryWords[offset++];
const size_t l = w.len & 0x7F;
const size_t n = (size_t)1 << kBrotliDictionarySizeBitsByLength[l];
DictWord w = dictionary->dict_words[offset++];
const size_t l = w.len & 0x1F;
const size_t n = (size_t)1 << dictionary->words->size_bits_by_length[l];
const size_t id = w.idx;
end = !!(w.len & 0x80);
w.len = (uint8_t)l;
if (w.transform == 0 && IsMatch(w, &data[2], max_length - 2)) {
if (data[0] == 0xc2) {
if (w.transform == 0 &&
IsMatch(dictionary->words, w, &data[2], max_length - 2)) {
if (data[0] == 0xC2) {
AddMatch(id + 102 * n, l + 2, l, matches);
has_found_match = BROTLI_TRUE;
} else if (l + 2 < max_length && data[l + 2] == ' ') {
@ -441,16 +448,17 @@ BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
data[3] == 'e' && data[4] == ' ') ||
(data[0] == '.' && data[1] == 'c' && data[2] == 'o' &&
data[3] == 'm' && data[4] == '/')) {
size_t offset = kStaticDictionaryBuckets[Hash(&data[5])];
size_t offset = dictionary->buckets[Hash(&data[5])];
BROTLI_BOOL end = !offset;
while (!end) {
DictWord w = kStaticDictionaryWords[offset++];
const size_t l = w.len & 0x7F;
const size_t n = (size_t)1 << kBrotliDictionarySizeBitsByLength[l];
DictWord w = dictionary->dict_words[offset++];
const size_t l = w.len & 0x1F;
const size_t n = (size_t)1 << dictionary->words->size_bits_by_length[l];
const size_t id = w.idx;
end = !!(w.len & 0x80);
w.len = (uint8_t)l;
if (w.transform == 0 && IsMatch(w, &data[5], max_length - 5)) {
if (w.transform == 0 &&
IsMatch(dictionary->words, w, &data[5], max_length - 5)) {
AddMatch(id + (data[0] == ' ' ? 41 : 72) * n, l + 5, l, matches);
has_found_match = BROTLI_TRUE;
if (l + 5 < max_length) {

9
BaseTools/Source/C/BrotliCompress/enc/static_dict.h
View File

@ -9,15 +9,17 @@
#ifndef BROTLI_ENC_STATIC_DICT_H_
#define BROTLI_ENC_STATIC_DICT_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/dictionary.h"
#include "../common/platform.h"
#include <brotli/types.h>
#include "./encoder_dict.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN 37
static const uint32_t kInvalidMatch = 0xfffffff;
static const uint32_t kInvalidMatch = 0xFFFFFFF;
/* Matches data against static dictionary words, and for each length l,
for which a match is found, updates matches[l] to be the minimum possible
@ -27,6 +29,7 @@ static const uint32_t kInvalidMatch = 0xfffffff;
matches array is at least BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN + 1 long
all elements are initialized to kInvalidMatch */
BROTLI_INTERNAL BROTLI_BOOL BrotliFindAllStaticDictionaryMatches(
const BrotliEncoderDictionary* dictionary,
const uint8_t* data, size_t min_length, size_t max_length,
uint32_t* matches);

17035
BaseTools/Source/C/BrotliCompress/enc/static_dict_lut.h
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File diff suppressed because it is too large Load Diff

121
BaseTools/Source/C/BrotliCompress/enc/streams.h
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@ -1,121 +0,0 @@
/* Copyright 2009 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Input and output classes for streaming brotli compression. */
#ifndef BROTLI_ENC_STREAMS_H_
#define BROTLI_ENC_STREAMS_H_
#include <stdio.h>
#include <string>
#include "../common/types.h"
namespace brotli {
/* Input interface for the compression routines. */
class BrotliIn {
public:
virtual ~BrotliIn(void) {}
/* Return a pointer to the next block of input of at most n bytes.
Return the actual length in *nread.
At end of data, return NULL. Don't return NULL if there is more data
to read, even if called with n == 0.
Read will only be called if some of its bytes are needed. */
virtual const void* Read(size_t n, size_t* nread) = 0;
};
/* Output interface for the compression routines. */
class BrotliOut {
public:
virtual ~BrotliOut(void) {}
/* Write n bytes of data from buf.
Return true if all written, false otherwise. */
virtual bool Write(const void *buf, size_t n) = 0;
};
/* Adapter class to make BrotliIn objects from raw memory. */
class BrotliMemIn : public BrotliIn {
public:
BrotliMemIn(const void* buf, size_t len);
void Reset(const void* buf, size_t len);
/* returns the amount of data consumed */
size_t position(void) const { return pos_; }
const void* Read(size_t n, size_t* OUTPUT);
private:
const void* buf_; /* start of input buffer */
size_t len_; /* length of input */
size_t pos_; /* current read position within input */
};
/* Adapter class to make BrotliOut objects from raw memory. */
class BrotliMemOut : public BrotliOut {
public:
BrotliMemOut(void* buf, size_t len);
void Reset(void* buf, size_t len);
/* returns the amount of data written */
size_t position(void) const { return pos_; }
bool Write(const void* buf, size_t n);
private:
void* buf_; /* start of output buffer */
size_t len_; /* length of output */
size_t pos_; /* current write position within output */
};
/* Adapter class to make BrotliOut objects from a string. */
class BrotliStringOut : public BrotliOut {
public:
/* Create a writer that appends its data to buf.
buf->size() will grow to at most max_size
buf is expected to be empty when constructing BrotliStringOut. */
BrotliStringOut(std::string* buf, size_t max_size);
void Reset(std::string* buf, size_t max_len);
bool Write(const void* buf, size_t n);
private:
std::string* buf_; /* start of output buffer */
size_t max_size_; /* max length of output */
};
/* Adapter class to make BrotliIn object from a file. */
class BrotliFileIn : public BrotliIn {
public:
BrotliFileIn(FILE* f, size_t max_read_size);
~BrotliFileIn(void);
const void* Read(size_t n, size_t* bytes_read);
private:
FILE* f_;
char* buf_;
size_t buf_size_;
};
/* Adapter class to make BrotliOut object from a file. */
class BrotliFileOut : public BrotliOut {
public:
explicit BrotliFileOut(FILE* f);
bool Write(const void* buf, size_t n);
private:
FILE* f_;
};
} /* namespace brotli */
#endif /* BROTLI_ENC_STREAMS_H_ */

42
BaseTools/Source/C/BrotliCompress/enc/utf8_util.c
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@ -8,7 +8,7 @@
#include "./utf8_util.h"
#include "../common/types.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -25,37 +25,37 @@ static size_t BrotliParseAsUTF8(
}
/* 2-byte UTF8 */
if (size > 1u &&
(input[0] & 0xe0) == 0xc0 &&
(input[1] & 0xc0) == 0x80) {
*symbol = (((input[0] & 0x1f) << 6) |
(input[1] & 0x3f));
if (*symbol > 0x7f) {
(input[0] & 0xE0) == 0xC0 &&
(input[1] & 0xC0) == 0x80) {
*symbol = (((input[0] & 0x1F) << 6) |
(input[1] & 0x3F));
if (*symbol > 0x7F) {
return 2;
}
}
/* 3-byte UFT8 */
if (size > 2u &&
(input[0] & 0xf0) == 0xe0 &&
(input[1] & 0xc0) == 0x80 &&
(input[2] & 0xc0) == 0x80) {
*symbol = (((input[0] & 0x0f) << 12) |
((input[1] & 0x3f) << 6) |
(input[2] & 0x3f));
if (*symbol > 0x7ff) {
(input[0] & 0xF0) == 0xE0 &&
(input[1] & 0xC0) == 0x80 &&
(input[2] & 0xC0) == 0x80) {
*symbol = (((input[0] & 0x0F) << 12) |
((input[1] & 0x3F) << 6) |
(input[2] & 0x3F));
if (*symbol > 0x7FF) {
return 3;
}
}
/* 4-byte UFT8 */
if (size > 3u &&
(input[0] & 0xf8) == 0xf0 &&
(input[1] & 0xc0) == 0x80 &&
(input[2] & 0xc0) == 0x80 &&
(input[3] & 0xc0) == 0x80) {
(input[0] & 0xF8) == 0xF0 &&
(input[1] & 0xC0) == 0x80 &&
(input[2] & 0xC0) == 0x80 &&
(input[3] & 0xC0) == 0x80) {
*symbol = (((input[0] & 0x07) << 18) |
((input[1] & 0x3f) << 12) |
((input[2] & 0x3f) << 6) |
(input[3] & 0x3f));
if (*symbol > 0xffff && *symbol <= 0x10ffff) {
((input[1] & 0x3F) << 12) |
((input[2] & 0x3F) << 6) |
(input[3] & 0x3F));
if (*symbol > 0xFFFF && *symbol <= 0x10FFFF) {
return 4;
}
}

6
BaseTools/Source/C/BrotliCompress/enc/utf8_util.h
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@ -9,8 +9,8 @@
#ifndef BROTLI_ENC_UTF8_UTIL_H_
#define BROTLI_ENC_UTF8_UTIL_H_
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -19,7 +19,7 @@ extern "C" {
static const double kMinUTF8Ratio = 0.75;
/* Returns 1 if at least min_fraction of the bytes between pos and
pos + length in the (data, mask) ringbuffer is UTF8-encoded, otherwise
pos + length in the (data, mask) ring-buffer is UTF8-encoded, otherwise
returns 0. */
BROTLI_INTERNAL BROTLI_BOOL BrotliIsMostlyUTF8(
const uint8_t* data, const size_t pos, const size_t mask,

41
BaseTools/Source/C/BrotliCompress/enc/write_bits.h
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@ -9,11 +9,8 @@
#ifndef BROTLI_ENC_WRITE_BITS_H_
#define BROTLI_ENC_WRITE_BITS_H_
#include <assert.h>
#include <stdio.h> /* printf */
#include "../common/types.h"
#include "./port.h"
#include "../common/platform.h"
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
@ -38,27 +35,27 @@ extern "C" {
and locate the rest in BYTE+1, BYTE+2, etc. */
static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
uint64_t bits,
size_t * BROTLI_RESTRICT pos,
uint8_t * BROTLI_RESTRICT array) {
#ifdef IS_LITTLE_ENDIAN
size_t* BROTLI_RESTRICT pos,
uint8_t* BROTLI_RESTRICT array) {
#if defined(BROTLI_LITTLE_ENDIAN)
/* This branch of the code can write up to 56 bits at a time,
7 bits are lost by being perhaps already in *p and at least
1 bit is needed to initialize the bit-stream ahead (i.e. if 7
bits are in *p and we write 57 bits, then the next write will
access a byte that was never initialized). */
uint8_t *p = &array[*pos >> 3];
uint64_t v = *p;
#ifdef BIT_WRITER_DEBUG
printf("WriteBits %2d 0x%016llx %10d\n", n_bits, bits, *pos);
#endif
assert((bits >> n_bits) == 0);
assert(n_bits <= 56);
uint8_t* p = &array[*pos >> 3];
uint64_t v = (uint64_t)(*p); /* Zero-extend 8 to 64 bits. */
BROTLI_LOG(("WriteBits %2d 0x%08x%08x %10d\n", (int)n_bits,
(uint32_t)(bits >> 32), (uint32_t)(bits & 0xFFFFFFFF),
(int)*pos));
BROTLI_DCHECK((bits >> n_bits) == 0);
BROTLI_DCHECK(n_bits <= 56);
v |= bits << (*pos & 7);
BROTLI_UNALIGNED_STORE64(p, v); /* Set some bits. */
BROTLI_UNALIGNED_STORE64LE(p, v); /* Set some bits. */
*pos += n_bits;
#else
/* implicit & 0xff is assumed for uint8_t arithmetics */
uint8_t *array_pos = &array[*pos >> 3];
/* implicit & 0xFF is assumed for uint8_t arithmetics */
uint8_t* array_pos = &array[*pos >> 3];
const size_t bits_reserved_in_first_byte = (*pos & 7);
size_t bits_left_to_write;
bits <<= bits_reserved_in_first_byte;
@ -75,11 +72,9 @@ static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
}
static BROTLI_INLINE void BrotliWriteBitsPrepareStorage(
size_t pos, uint8_t *array) {
#ifdef BIT_WRITER_DEBUG
printf("WriteBitsPrepareStorage %10d\n", pos);
#endif
assert((pos & 7) == 0);
size_t pos, uint8_t* array) {
BROTLI_LOG(("WriteBitsPrepareStorage %10d\n", (int)pos));
BROTLI_DCHECK((pos & 7) == 0);
array[pos >> 3] = 0;
}

344
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@ -0,0 +1,344 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* API for Brotli decompression.
*/
#ifndef BROTLI_DEC_DECODE_H_
#define BROTLI_DEC_DECODE_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/**
* Opaque structure that holds decoder state.
*
* Allocated and initialized with ::BrotliDecoderCreateInstance.
* Cleaned up and deallocated with ::BrotliDecoderDestroyInstance.
*/
typedef struct BrotliDecoderStateStruct BrotliDecoderState;
/**
* Result type for ::BrotliDecoderDecompress and
* ::BrotliDecoderDecompressStream functions.
*/
typedef enum {
/** Decoding error, e.g. corrupted input or memory allocation problem. */
BROTLI_DECODER_RESULT_ERROR = 0,
/** Decoding successfully completed. */
BROTLI_DECODER_RESULT_SUCCESS = 1,
/** Partially done; should be called again with more input. */
BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT = 2,
/** Partially done; should be called again with more output. */
BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT = 3
} BrotliDecoderResult;
/**
* Template that evaluates items of ::BrotliDecoderErrorCode.
*
* Example: @code {.cpp}
* // Log Brotli error code.
* switch (brotliDecoderErrorCode) {
* #define CASE_(PREFIX, NAME, CODE) \
* case BROTLI_DECODER ## PREFIX ## NAME: \
* LOG(INFO) << "error code:" << #NAME; \
* break;
* #define NEWLINE_
* BROTLI_DECODER_ERROR_CODES_LIST(CASE_, NEWLINE_)
* #undef CASE_
* #undef NEWLINE_
* default: LOG(FATAL) << "unknown brotli error code";
* }
* @endcode
*/
#define BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE, SEPARATOR) \
BROTLI_ERROR_CODE(_, NO_ERROR, 0) SEPARATOR \
/* Same as BrotliDecoderResult values */ \
BROTLI_ERROR_CODE(_, SUCCESS, 1) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_INPUT, 2) SEPARATOR \
BROTLI_ERROR_CODE(_, NEEDS_MORE_OUTPUT, 3) SEPARATOR \
\
/* Errors caused by invalid input */ \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_NIBBLE, -1) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, RESERVED, -2) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_META_NIBBLE, -3) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_ALPHABET, -4) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_SAME, -5) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CL_SPACE, -6) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, HUFFMAN_SPACE, -7) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, CONTEXT_MAP_REPEAT, -8) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_1, -9) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_2, -10) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, TRANSFORM, -11) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, DICTIONARY, -12) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, WINDOW_BITS, -13) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_1, -14) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_2, -15) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_FORMAT_, DISTANCE, -16) SEPARATOR \
\
/* -17..-18 codes are reserved */ \
\
BROTLI_ERROR_CODE(_ERROR_, DICTIONARY_NOT_SET, -19) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_, INVALID_ARGUMENTS, -20) SEPARATOR \
\
/* Memory allocation problems */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MODES, -21) SEPARATOR \
/* Literal, insert and distance trees together */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, TREE_GROUPS, -22) SEPARATOR \
/* -23..-24 codes are reserved for distinct tree groups */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MAP, -25) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_1, -26) SEPARATOR \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_2, -27) SEPARATOR \
/* -28..-29 codes are reserved for dynamic ring-buffer allocation */ \
BROTLI_ERROR_CODE(_ERROR_ALLOC_, BLOCK_TYPE_TREES, -30) SEPARATOR \
\
/* "Impossible" states */ \
BROTLI_ERROR_CODE(_ERROR_, UNREACHABLE, -31)
/**
* Error code for detailed logging / production debugging.
*
* See ::BrotliDecoderGetErrorCode and ::BROTLI_LAST_ERROR_CODE.
*/
typedef enum {
#define BROTLI_COMMA_ ,
#define BROTLI_ERROR_CODE_ENUM_ITEM_(PREFIX, NAME, CODE) \
BROTLI_DECODER ## PREFIX ## NAME = CODE
BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE_ENUM_ITEM_, BROTLI_COMMA_)
} BrotliDecoderErrorCode;
#undef BROTLI_ERROR_CODE_ENUM_ITEM_
#undef BROTLI_COMMA_
/**
* The value of the last error code, negative integer.
*
* All other error code values are in the range from ::BROTLI_LAST_ERROR_CODE
* to @c -1. There are also 4 other possible non-error codes @c 0 .. @c 3 in
* ::BrotliDecoderErrorCode enumeration.
*/
#define BROTLI_LAST_ERROR_CODE BROTLI_DECODER_ERROR_UNREACHABLE
/** Options to be used with ::BrotliDecoderSetParameter. */
typedef enum BrotliDecoderParameter {
/**
* Disable "canny" ring buffer allocation strategy.
*
* Ring buffer is allocated according to window size, despite the real size of
* the content.
*/
BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION = 0,
/**
* Flag that determines if "Large Window Brotli" is used.
*/
BROTLI_DECODER_PARAM_LARGE_WINDOW = 1
} BrotliDecoderParameter;
/**
* Sets the specified parameter to the given decoder instance.
*
* @param state decoder instance
* @param param parameter to set
* @param value new parameter value
* @returns ::BROTLI_FALSE if parameter is unrecognized, or value is invalid
* @returns ::BROTLI_TRUE if value is accepted
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderSetParameter(
BrotliDecoderState* state, BrotliDecoderParameter param, uint32_t value);
/**
* Creates an instance of ::BrotliDecoderState and initializes it.
*
* The instance can be used once for decoding and should then be destroyed with
* ::BrotliDecoderDestroyInstance, it cannot be reused for a new decoding
* session.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
* @returns @c 0 if instance can not be allocated or initialized
* @returns pointer to initialized ::BrotliDecoderState otherwise
*/
BROTLI_DEC_API BrotliDecoderState* BrotliDecoderCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/**
* Deinitializes and frees ::BrotliDecoderState instance.
*
* @param state decoder instance to be cleaned up and deallocated
*/
BROTLI_DEC_API void BrotliDecoderDestroyInstance(BrotliDecoderState* state);
/**
* Performs one-shot memory-to-memory decompression.
*
* Decompresses the data in @p encoded_buffer into @p decoded_buffer, and sets
* @p *decoded_size to the decompressed length.
*
* @param encoded_size size of @p encoded_buffer
* @param encoded_buffer compressed data buffer with at least @p encoded_size
* addressable bytes
* @param[in, out] decoded_size @b in: size of @p decoded_buffer; \n
* @b out: length of decompressed data written to
* @p decoded_buffer
* @param decoded_buffer decompressed data destination buffer
* @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory
* allocation failed, or @p decoded_buffer is not large enough;
* @returns ::BROTLI_DECODER_RESULT_SUCCESS otherwise
*/
BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompress(
size_t encoded_size,
const uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(encoded_size)],
size_t* decoded_size,
uint8_t decoded_buffer[BROTLI_ARRAY_PARAM(*decoded_size)]);
/**
* Decompresses the input stream to the output stream.
*
* The values @p *available_in and @p *available_out must specify the number of
* bytes addressable at @p *next_in and @p *next_out respectively.
* When @p *available_out is @c 0, @p next_out is allowed to be @c NULL.
*
* After each call, @p *available_in will be decremented by the amount of input
* bytes consumed, and the @p *next_in pointer will be incremented by that
* amount. Similarly, @p *available_out will be decremented by the amount of
* output bytes written, and the @p *next_out pointer will be incremented by
* that amount.
*
* @p total_out, if it is not a null-pointer, will be set to the number
* of bytes decompressed since the last @p state initialization.
*
* @note Input is never overconsumed, so @p next_in and @p available_in could be
* passed to the next consumer after decoding is complete.
*
* @param state decoder instance
* @param[in, out] available_in @b in: amount of available input; \n
* @b out: amount of unused input
* @param[in, out] next_in pointer to the next compressed byte
* @param[in, out] available_out @b in: length of output buffer; \n
* @b out: remaining size of output buffer
* @param[in, out] next_out output buffer cursor;
* can be @c NULL if @p available_out is @c 0
* @param[out] total_out number of bytes decompressed so far; can be @c NULL
* @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory
* allocation failed, arguments were invalid, etc.;
* use ::BrotliDecoderGetErrorCode to get detailed error code
* @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT decoding is blocked until
* more input data is provided
* @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT decoding is blocked until
* more output space is provided
* @returns ::BROTLI_DECODER_RESULT_SUCCESS decoding is finished, no more
* input might be consumed and no more output will be produced
*/
BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompressStream(
BrotliDecoderState* state, size_t* available_in, const uint8_t** next_in,
size_t* available_out, uint8_t** next_out, size_t* total_out);
/**
* Checks if decoder has more output.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE, if decoder has some unconsumed output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderHasMoreOutput(
const BrotliDecoderState* state);
/**
* Acquires pointer to internal output buffer.
*
* This method is used to make language bindings easier and more efficient:
* -# push data to ::BrotliDecoderDecompressStream,
* until ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT is reported
* -# use ::BrotliDecoderTakeOutput to peek bytes and copy to language-specific
* entity
*
* Also this could be useful if there is an output stream that is able to
* consume all the provided data (e.g. when data is saved to file system).
*
* @attention After every call to ::BrotliDecoderTakeOutput @p *size bytes of
* output are considered consumed for all consecutive calls to the
* instance methods; returned pointer becomes invalidated as well.
*
* @note Decoder output is not guaranteed to be contiguous. This means that
* after the size-unrestricted call to ::BrotliDecoderTakeOutput,
* immediate next call to ::BrotliDecoderTakeOutput may return more data.
*
* @param state decoder instance
* @param[in, out] size @b in: number of bytes caller is ready to take, @c 0 if
* any amount could be handled; \n
* @b out: amount of data pointed by returned pointer and
* considered consumed; \n
* out value is never greater than in value, unless it is @c 0
* @returns pointer to output data
*/
BROTLI_DEC_API const uint8_t* BrotliDecoderTakeOutput(
BrotliDecoderState* state, size_t* size);
/**
* Checks if instance has already consumed input.
*
* Instance that returns ::BROTLI_FALSE is considered "fresh" and could be
* reused.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE if decoder has already used some input bytes
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* state);
/**
* Checks if decoder instance reached the final state.
*
* @param state decoder instance
* @returns ::BROTLI_TRUE if decoder is in a state where it reached the end of
* the input and produced all of the output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsFinished(
const BrotliDecoderState* state);
/**
* Acquires a detailed error code.
*
* Should be used only after ::BrotliDecoderDecompressStream returns
* ::BROTLI_DECODER_RESULT_ERROR.
*
* See also ::BrotliDecoderErrorString
*
* @param state decoder instance
* @returns last saved error code
*/
BROTLI_DEC_API BrotliDecoderErrorCode BrotliDecoderGetErrorCode(
const BrotliDecoderState* state);
/**
* Converts error code to a c-string.
*/
BROTLI_DEC_API const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c);
/**
* Gets a decoder library version.
*
* Look at BROTLI_VERSION for more information.
*/
BROTLI_DEC_API uint32_t BrotliDecoderVersion(void);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_DEC_DECODE_H_ */

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@ -0,0 +1,427 @@
/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* API for Brotli compression.
*/
#ifndef BROTLI_ENC_ENCODE_H_
#define BROTLI_ENC_ENCODE_H_
#include <brotli/port.h>
#include <brotli/types.h>
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/** Minimal value for ::BROTLI_PARAM_LGWIN parameter. */
#define BROTLI_MIN_WINDOW_BITS 10
/**
* Maximal value for ::BROTLI_PARAM_LGWIN parameter.
*
* @note equal to @c BROTLI_MAX_DISTANCE_BITS constant.
*/
#define BROTLI_MAX_WINDOW_BITS 24
/**
* Maximal value for ::BROTLI_PARAM_LGWIN parameter
* in "Large Window Brotli" (32-bit).
*/
#define BROTLI_LARGE_MAX_WINDOW_BITS 30
/** Minimal value for ::BROTLI_PARAM_LGBLOCK parameter. */
#define BROTLI_MIN_INPUT_BLOCK_BITS 16
/** Maximal value for ::BROTLI_PARAM_LGBLOCK parameter. */
#define BROTLI_MAX_INPUT_BLOCK_BITS 24
/** Minimal value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_MIN_QUALITY 0
/** Maximal value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_MAX_QUALITY 11
/** Options for ::BROTLI_PARAM_MODE parameter. */
typedef enum BrotliEncoderMode {
/**
* Default compression mode.
*
* In this mode compressor does not know anything in advance about the
* properties of the input.
*/
BROTLI_MODE_GENERIC = 0,
/** Compression mode for UTF-8 formatted text input. */
BROTLI_MODE_TEXT = 1,
/** Compression mode used in WOFF 2.0. */
BROTLI_MODE_FONT = 2
} BrotliEncoderMode;
/** Default value for ::BROTLI_PARAM_QUALITY parameter. */
#define BROTLI_DEFAULT_QUALITY 11
/** Default value for ::BROTLI_PARAM_LGWIN parameter. */
#define BROTLI_DEFAULT_WINDOW 22
/** Default value for ::BROTLI_PARAM_MODE parameter. */
#define BROTLI_DEFAULT_MODE BROTLI_MODE_GENERIC
/** Operations that can be performed by streaming encoder. */
typedef enum BrotliEncoderOperation {
/**
* Process input.
*
* Encoder may postpone producing output, until it has processed enough input.
*/
BROTLI_OPERATION_PROCESS = 0,
/**
* Produce output for all processed input.
*
* Actual flush is performed when input stream is depleted and there is enough
* space in output stream. This means that client should repeat
* ::BROTLI_OPERATION_FLUSH operation until @p available_in becomes @c 0, and
* ::BrotliEncoderHasMoreOutput returns ::BROTLI_FALSE. If output is acquired
* via ::BrotliEncoderTakeOutput, then operation should be repeated after
* output buffer is drained.
*
* @warning Until flush is complete, client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* When flush is complete, output data will be sufficient for decoder to
* reproduce all the given input.
*/
BROTLI_OPERATION_FLUSH = 1,
/**
* Finalize the stream.
*
* Actual finalization is performed when input stream is depleted and there is
* enough space in output stream. This means that client should repeat
* ::BROTLI_OPERATION_FINISH operation until @p available_in becomes @c 0, and
* ::BrotliEncoderHasMoreOutput returns ::BROTLI_FALSE. If output is acquired
* via ::BrotliEncoderTakeOutput, then operation should be repeated after
* output buffer is drained.
*
* @warning Until finalization is complete, client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* Helper function ::BrotliEncoderIsFinished checks if stream is finalized and
* output fully dumped.
*
* Adding more input data to finalized stream is impossible.
*/
BROTLI_OPERATION_FINISH = 2,
/**
* Emit metadata block to stream.
*
* Metadata is opaque to Brotli: neither encoder, nor decoder processes this
* data or relies on it. It may be used to pass some extra information from
* encoder client to decoder client without interfering with main data stream.
*
* @note Encoder may emit empty metadata blocks internally, to pad encoded
* stream to byte boundary.
*
* @warning Until emitting metadata is complete client @b SHOULD @b NOT swap,
* reduce or extend input stream.
*
* @warning The whole content of input buffer is considered to be the content
* of metadata block. Do @b NOT @e append metadata to input stream,
* before it is depleted with other operations.
*
* Stream is soft-flushed before metadata block is emitted. Metadata block
* @b MUST be no longer than than 16MiB.
*/
BROTLI_OPERATION_EMIT_METADATA = 3
} BrotliEncoderOperation;
/** Options to be used with ::BrotliEncoderSetParameter. */
typedef enum BrotliEncoderParameter {
/**
* Tune encoder for specific input.
*
* ::BrotliEncoderMode enumerates all available values.
*/
BROTLI_PARAM_MODE = 0,
/**
* The main compression speed-density lever.
*
* The higher the quality, the slower the compression. Range is
* from ::BROTLI_MIN_QUALITY to ::BROTLI_MAX_QUALITY.
*/
BROTLI_PARAM_QUALITY = 1,
/**
* Recommended sliding LZ77 window size.
*
* Encoder may reduce this value, e.g. if input is much smaller than
* window size.
*
* Window size is `(1 << value) - 16`.
*
* Range is from ::BROTLI_MIN_WINDOW_BITS to ::BROTLI_MAX_WINDOW_BITS.
*/
BROTLI_PARAM_LGWIN = 2,
/**
* Recommended input block size.
*
* Encoder may reduce this value, e.g. if input is much smaller than input
* block size.
*
* Range is from ::BROTLI_MIN_INPUT_BLOCK_BITS to
* ::BROTLI_MAX_INPUT_BLOCK_BITS.
*
* @note Bigger input block size allows better compression, but consumes more
* memory. \n The rough formula of memory used for temporary input
* storage is `3 << lgBlock`.
*/
BROTLI_PARAM_LGBLOCK = 3,
/**
* Flag that affects usage of "literal context modeling" format feature.
*
* This flag is a "decoding-speed vs compression ratio" trade-off.
*/
BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING = 4,
/**
* Estimated total input size for all ::BrotliEncoderCompressStream calls.
*
* The default value is 0, which means that the total input size is unknown.
*/
BROTLI_PARAM_SIZE_HINT = 5,
/**
* Flag that determines if "Large Window Brotli" is used.
*/
BROTLI_PARAM_LARGE_WINDOW = 6,
/**
* Recommended number of postfix bits (NPOSTFIX).
*
* Encoder may change this value.
*
* Range is from 0 to ::BROTLI_MAX_NPOSTFIX.
*/
BROTLI_PARAM_NPOSTFIX = 7,
/**
* Recommended number of direct distance codes (NDIRECT).
*
* Encoder may change this value.
*
* Range is from 0 to (15 << NPOSTFIX) in steps of (1 << NPOSTFIX).
*/
BROTLI_PARAM_NDIRECT = 8
} BrotliEncoderParameter;
/**
* Opaque structure that holds encoder state.
*
* Allocated and initialized with ::BrotliEncoderCreateInstance.
* Cleaned up and deallocated with ::BrotliEncoderDestroyInstance.
*/
typedef struct BrotliEncoderStateStruct BrotliEncoderState;
/**
* Sets the specified parameter to the given encoder instance.
*
* @param state encoder instance
* @param param parameter to set
* @param value new parameter value
* @returns ::BROTLI_FALSE if parameter is unrecognized, or value is invalid
* @returns ::BROTLI_FALSE if value of parameter can not be changed at current
* encoder state (e.g. when encoding is started, window size might be
* already encoded and therefore it is impossible to change it)
* @returns ::BROTLI_TRUE if value is accepted
* @warning invalid values might be accepted in case they would not break
* encoding process.
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderSetParameter(
BrotliEncoderState* state, BrotliEncoderParameter param, uint32_t value);
/**
* Creates an instance of ::BrotliEncoderState and initializes it.
*
* @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the
* case they are both zero, default memory allocators are used. @p opaque is
* passed to @p alloc_func and @p free_func when they are called. @p free_func
* has to return without doing anything when asked to free a NULL pointer.
*
* @param alloc_func custom memory allocation function
* @param free_func custom memory free function
* @param opaque custom memory manager handle
* @returns @c 0 if instance can not be allocated or initialized
* @returns pointer to initialized ::BrotliEncoderState otherwise
*/
BROTLI_ENC_API BrotliEncoderState* BrotliEncoderCreateInstance(
brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
/**
* Deinitializes and frees ::BrotliEncoderState instance.
*
* @param state decoder instance to be cleaned up and deallocated
*/
BROTLI_ENC_API void BrotliEncoderDestroyInstance(BrotliEncoderState* state);
/**
* Calculates the output size bound for the given @p input_size.
*
* @warning Result is only valid if quality is at least @c 2 and, in
* case ::BrotliEncoderCompressStream was used, no flushes
* (::BROTLI_OPERATION_FLUSH) were performed.
*
* @param input_size size of projected input
* @returns @c 0 if result does not fit @c size_t
*/
BROTLI_ENC_API size_t BrotliEncoderMaxCompressedSize(size_t input_size);
/**
* Performs one-shot memory-to-memory compression.
*
* Compresses the data in @p input_buffer into @p encoded_buffer, and sets
* @p *encoded_size to the compressed length.
*
* @note If ::BrotliEncoderMaxCompressedSize(@p input_size) returns non-zero
* value, then output is guaranteed to be no longer than that.
*
* @param quality quality parameter value, e.g. ::BROTLI_DEFAULT_QUALITY
* @param lgwin lgwin parameter value, e.g. ::BROTLI_DEFAULT_WINDOW
* @param mode mode parameter value, e.g. ::BROTLI_DEFAULT_MODE
* @param input_size size of @p input_buffer
* @param input_buffer input data buffer with at least @p input_size
* addressable bytes
* @param[in, out] encoded_size @b in: size of @p encoded_buffer; \n
* @b out: length of compressed data written to
* @p encoded_buffer, or @c 0 if compression fails
* @param encoded_buffer compressed data destination buffer
* @returns ::BROTLI_FALSE in case of compression error
* @returns ::BROTLI_FALSE if output buffer is too small
* @returns ::BROTLI_TRUE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderCompress(
int quality, int lgwin, BrotliEncoderMode mode, size_t input_size,
const uint8_t input_buffer[BROTLI_ARRAY_PARAM(input_size)],
size_t* encoded_size,
uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(*encoded_size)]);
/**
* Compresses input stream to output stream.
*
* The values @p *available_in and @p *available_out must specify the number of
* bytes addressable at @p *next_in and @p *next_out respectively.
* When @p *available_out is @c 0, @p next_out is allowed to be @c NULL.
*
* After each call, @p *available_in will be decremented by the amount of input
* bytes consumed, and the @p *next_in pointer will be incremented by that
* amount. Similarly, @p *available_out will be decremented by the amount of
* output bytes written, and the @p *next_out pointer will be incremented by
* that amount.
*
* @p total_out, if it is not a null-pointer, will be set to the number
* of bytes compressed since the last @p state initialization.
*
*
*
* Internally workflow consists of 3 tasks:
* -# (optionally) copy input data to internal buffer
* -# actually compress data and (optionally) store it to internal buffer
* -# (optionally) copy compressed bytes from internal buffer to output stream
*
* Whenever all 3 tasks can't move forward anymore, or error occurs, this
* method returns the control flow to caller.
*
* @p op is used to perform flush, finish the stream, or inject metadata block.
* See ::BrotliEncoderOperation for more information.
*
* Flushing the stream means forcing encoding of all input passed to encoder and
* completing the current output block, so it could be fully decoded by stream
* decoder. To perform flush set @p op to ::BROTLI_OPERATION_FLUSH.
* Under some circumstances (e.g. lack of output stream capacity) this operation
* would require several calls to ::BrotliEncoderCompressStream. The method must
* be called again until both input stream is depleted and encoder has no more
* output (see ::BrotliEncoderHasMoreOutput) after the method is called.
*
* Finishing the stream means encoding of all input passed to encoder and
* adding specific "final" marks, so stream decoder could determine that stream
* is complete. To perform finish set @p op to ::BROTLI_OPERATION_FINISH.
* Under some circumstances (e.g. lack of output stream capacity) this operation
* would require several calls to ::BrotliEncoderCompressStream. The method must
* be called again until both input stream is depleted and encoder has no more
* output (see ::BrotliEncoderHasMoreOutput) after the method is called.
*
* @warning When flushing and finishing, @p op should not change until operation
* is complete; input stream should not be swapped, reduced or
* extended as well.
*
* @param state encoder instance
* @param op requested operation
* @param[in, out] available_in @b in: amount of available input; \n
* @b out: amount of unused input
* @param[in, out] next_in pointer to the next input byte
* @param[in, out] available_out @b in: length of output buffer; \n
* @b out: remaining size of output buffer
* @param[in, out] next_out compressed output buffer cursor;
* can be @c NULL if @p available_out is @c 0
* @param[out] total_out number of bytes produced so far; can be @c NULL
* @returns ::BROTLI_FALSE if there was an error
* @returns ::BROTLI_TRUE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderCompressStream(
BrotliEncoderState* state, BrotliEncoderOperation op, size_t* available_in,
const uint8_t** next_in, size_t* available_out, uint8_t** next_out,
size_t* total_out);
/**
* Checks if encoder instance reached the final state.
*
* @param state encoder instance
* @returns ::BROTLI_TRUE if encoder is in a state where it reached the end of
* the input and produced all of the output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderIsFinished(BrotliEncoderState* state);
/**
* Checks if encoder has more output.
*
* @param state encoder instance
* @returns ::BROTLI_TRUE, if encoder has some unconsumed output
* @returns ::BROTLI_FALSE otherwise
*/
BROTLI_ENC_API BROTLI_BOOL BrotliEncoderHasMoreOutput(
BrotliEncoderState* state);
/**
* Acquires pointer to internal output buffer.
*
* This method is used to make language bindings easier and more efficient:
* -# push data to ::BrotliEncoderCompressStream,
* until ::BrotliEncoderHasMoreOutput returns BROTL_TRUE
* -# use ::BrotliEncoderTakeOutput to peek bytes and copy to language-specific
* entity
*
* Also this could be useful if there is an output stream that is able to
* consume all the provided data (e.g. when data is saved to file system).
*
* @attention After every call to ::BrotliEncoderTakeOutput @p *size bytes of
* output are considered consumed for all consecutive calls to the
* instance methods; returned pointer becomes invalidated as well.
*
* @note Encoder output is not guaranteed to be contiguous. This means that
* after the size-unrestricted call to ::BrotliEncoderTakeOutput,
* immediate next call to ::BrotliEncoderTakeOutput may return more data.
*
* @param state encoder instance
* @param[in, out] size @b in: number of bytes caller is ready to take, @c 0 if
* any amount could be handled; \n
* @b out: amount of data pointed by returned pointer and
* considered consumed; \n
* out value is never greater than in value, unless it is @c 0
* @returns pointer to output data
*/
BROTLI_ENC_API const uint8_t* BrotliEncoderTakeOutput(
BrotliEncoderState* state, size_t* size);
/**
* Gets an encoder library version.
*
* Look at BROTLI_VERSION for more information.
*/
BROTLI_ENC_API uint32_t BrotliEncoderVersion(void);
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif
#endif /* BROTLI_ENC_ENCODE_H_ */

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/* Copyright 2016 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Macros for compiler / platform specific API declarations. */
#ifndef BROTLI_COMMON_PORT_H_
#define BROTLI_COMMON_PORT_H_
/* The following macros were borrowed from https://github.com/nemequ/hedley
* with permission of original author - Evan Nemerson <evan@nemerson.com> */
/* >>> >>> >>> hedley macros */
#define BROTLI_MAKE_VERSION(major, minor, revision) \
(((major) * 1000000) + ((minor) * 1000) + (revision))
#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__)
#define BROTLI_GNUC_VERSION \
BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
#elif defined(__GNUC__)
#define BROTLI_GNUC_VERSION BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, 0)
#endif
#if defined(BROTLI_GNUC_VERSION)
#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) \
(BROTLI_GNUC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 140000000)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION((_MSC_FULL_VER / 10000000), \
(_MSC_FULL_VER % 10000000) / 100000, \
(_MSC_FULL_VER % 100000) / 100)
#elif defined(_MSC_FULL_VER)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION((_MSC_FULL_VER / 1000000), \
(_MSC_FULL_VER % 1000000) / 10000, \
(_MSC_FULL_VER % 10000) / 10)
#elif defined(_MSC_VER)
#define BROTLI_MSVC_VERSION \
BROTLI_MAKE_VERSION(_MSC_VER / 100, _MSC_VER % 100, 0)
#endif
#if !defined(_MSC_VER)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) (0)
#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_FULL_VER >= ((major * 10000000) + (minor * 100000) + (patch)))
#elif defined(_MSC_VER) && (_MSC_VER >= 1200)
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_FULL_VER >= ((major * 1000000) + (minor * 10000) + (patch)))
#else
#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \
(_MSC_VER >= ((major * 100) + (minor)))
#endif
#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE)
#define BROTLI_INTEL_VERSION \
BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, \
__INTEL_COMPILER % 100, \
__INTEL_COMPILER_UPDATE)
#elif defined(__INTEL_COMPILER)
#define BROTLI_INTEL_VERSION \
BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, 0)
#endif
#if defined(BROTLI_INTEL_VERSION)
#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) \
(BROTLI_INTEL_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__PGI) && \
defined(__PGIC__) && defined(__PGIC_MINOR__) && defined(__PGIC_PATCHLEVEL__)
#define BROTLI_PGI_VERSION \
BROTLI_MAKE_VERSION(__PGIC__, __PGIC_MINOR__, __PGIC_PATCHLEVEL__)
#endif
#if defined(BROTLI_PGI_VERSION)
#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) \
(BROTLI_PGI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__SUNPRO_C) && (__SUNPRO_C > 0x1000)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION( \
(((__SUNPRO_C >> 16) & 0xf) * 10) + ((__SUNPRO_C >> 12) & 0xf), \
(((__SUNPRO_C >> 8) & 0xf) * 10) + ((__SUNPRO_C >> 4) & 0xf), \
(__SUNPRO_C & 0xf) * 10)
#elif defined(__SUNPRO_C)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION((__SUNPRO_C >> 8) & 0xf, \
(__SUNPRO_C >> 4) & 0xf, \
(__SUNPRO_C) & 0xf)
#elif defined(__SUNPRO_CC) && (__SUNPRO_CC > 0x1000)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION( \
(((__SUNPRO_CC >> 16) & 0xf) * 10) + ((__SUNPRO_CC >> 12) & 0xf), \
(((__SUNPRO_CC >> 8) & 0xf) * 10) + ((__SUNPRO_CC >> 4) & 0xf), \
(__SUNPRO_CC & 0xf) * 10)
#elif defined(__SUNPRO_CC)
#define BROTLI_SUNPRO_VERSION \
BROTLI_MAKE_VERSION((__SUNPRO_CC >> 8) & 0xf, \
(__SUNPRO_CC >> 4) & 0xf, \
(__SUNPRO_CC) & 0xf)
#endif
#if defined(BROTLI_SUNPRO_VERSION)
#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) \
(BROTLI_SUNPRO_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__CC_ARM) && defined(__ARMCOMPILER_VERSION)
#define BROTLI_ARM_VERSION \
BROTLI_MAKE_VERSION((__ARMCOMPILER_VERSION / 1000000), \
(__ARMCOMPILER_VERSION % 1000000) / 10000, \
(__ARMCOMPILER_VERSION % 10000) / 100)
#elif defined(__CC_ARM) && defined(__ARMCC_VERSION)
#define BROTLI_ARM_VERSION \
BROTLI_MAKE_VERSION((__ARMCC_VERSION / 1000000), \
(__ARMCC_VERSION % 1000000) / 10000, \
(__ARMCC_VERSION % 10000) / 100)
#endif
#if defined(BROTLI_ARM_VERSION)
#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) \
(BROTLI_ARM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__ibmxl__)
#define BROTLI_IBM_VERSION \
BROTLI_MAKE_VERSION(__ibmxl_version__, \
__ibmxl_release__, \
__ibmxl_modification__)
#elif defined(__xlC__) && defined(__xlC_ver__)
#define BROTLI_IBM_VERSION \
BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, (__xlC_ver__ >> 8) & 0xff)
#elif defined(__xlC__)
#define BROTLI_IBM_VERSION BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, 0)
#endif
#if defined(BROTLI_IBM_VERSION)
#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) \
(BROTLI_IBM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__TI_COMPILER_VERSION__)
#define BROTLI_TI_VERSION \
BROTLI_MAKE_VERSION((__TI_COMPILER_VERSION__ / 1000000), \
(__TI_COMPILER_VERSION__ % 1000000) / 1000, \
(__TI_COMPILER_VERSION__ % 1000))
#endif
#if defined(BROTLI_TI_VERSION)
#define BROTLI_TI_VERSION_CHECK(major, minor, patch) \
(BROTLI_TI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_TI_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__IAR_SYSTEMS_ICC__)
#if __VER__ > 1000
#define BROTLI_IAR_VERSION \
BROTLI_MAKE_VERSION((__VER__ / 1000000), \
(__VER__ / 1000) % 1000, \
(__VER__ % 1000))
#else
#define BROTLI_IAR_VERSION BROTLI_MAKE_VERSION(VER / 100, __VER__ % 100, 0)
#endif
#endif
#if defined(BROTLI_IAR_VERSION)
#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) \
(BROTLI_IAR_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__TINYC__)
#define BROTLI_TINYC_VERSION \
BROTLI_MAKE_VERSION(__TINYC__ / 1000, (__TINYC__ / 100) % 10, __TINYC__ % 100)
#endif
#if defined(BROTLI_TINYC_VERSION)
#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) \
(BROTLI_TINYC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch))
#else
#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) (0)
#endif
#if defined(__has_attribute)
#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \
__has_attribute(attribute)
#else
#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \
BROTLI_GNUC_VERSION_CHECK(major, minor, patch)
#endif
#if defined(__has_builtin)
#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \
__has_builtin(builtin)
#else
#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \
BROTLI_GNUC_VERSION_CHECK(major, minor, patch)
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
#define BROTLI_PUBLIC
#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \
BROTLI_TI_VERSION_CHECK(8, 0, 0) || \
BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \
BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \
BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \
BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \
(BROTLI_TI_VERSION_CHECK(7, 3, 0) && \
defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__))
#define BROTLI_PUBLIC __attribute__ ((visibility ("default")))
#else
#define BROTLI_PUBLIC
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
!defined(__STDC_NO_VLA__) && !defined(__cplusplus) && \
!defined(__PGI) && !defined(__PGIC__) && !defined(__TINYC__)
#define BROTLI_ARRAY_PARAM(name) (name)
#else
#define BROTLI_ARRAY_PARAM(name)
#endif
/* <<< <<< <<< end of hedley macros. */
#if defined(BROTLI_SHARED_COMPILATION)
#if defined(_WIN32)
#if defined(BROTLICOMMON_SHARED_COMPILATION)
#define BROTLI_COMMON_API __declspec(dllexport)
#else
#define BROTLI_COMMON_API __declspec(dllimport)
#endif /* BROTLICOMMON_SHARED_COMPILATION */
#if defined(BROTLIDEC_SHARED_COMPILATION)
#define BROTLI_DEC_API __declspec(dllexport)
#else
#define BROTLI_DEC_API __declspec(dllimport)
#endif /* BROTLIDEC_SHARED_COMPILATION */
#if defined(BROTLIENC_SHARED_COMPILATION)
#define BROTLI_ENC_API __declspec(dllexport)
#else
#define BROTLI_ENC_API __declspec(dllimport)
#endif /* BROTLIENC_SHARED_COMPILATION */
#else /* _WIN32 */
#define BROTLI_COMMON_API BROTLI_PUBLIC
#define BROTLI_DEC_API BROTLI_PUBLIC
#define BROTLI_ENC_API BROTLI_PUBLIC
#endif /* _WIN32 */
#else /* BROTLI_SHARED_COMPILATION */
#define BROTLI_COMMON_API
#define BROTLI_DEC_API
#define BROTLI_ENC_API
#endif
#endif /* BROTLI_COMMON_PORT_H_ */

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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/**
* @file
* Common types used in decoder and encoder API.
*/
#ifndef BROTLI_COMMON_TYPES_H_
#define BROTLI_COMMON_TYPES_H_
#include <stddef.h> /* for size_t */
#if defined(_MSC_VER) && (_MSC_VER < 1600)
typedef __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
#else
#include <stdint.h>
#endif /* defined(_MSC_VER) && (_MSC_VER < 1600) */
/**
* A portable @c bool replacement.
*
* ::BROTLI_BOOL is a "documentation" type: actually it is @c int, but in API it
* denotes a type, whose only values are ::BROTLI_TRUE and ::BROTLI_FALSE.
*
* ::BROTLI_BOOL values passed to Brotli should either be ::BROTLI_TRUE or
* ::BROTLI_FALSE, or be a result of ::TO_BROTLI_BOOL macros.
*
* ::BROTLI_BOOL values returned by Brotli should not be tested for equality
* with @c true, @c false, ::BROTLI_TRUE, ::BROTLI_FALSE, but rather should be
* evaluated, for example: @code{.cpp}
* if (SomeBrotliFunction(encoder, BROTLI_TRUE) &&
* !OtherBrotliFunction(decoder, BROTLI_FALSE)) {
* bool x = !!YetAnotherBrotliFunction(encoder, TO_BROLTI_BOOL(2 * 2 == 4));
* DoSomething(x);
* }
* @endcode
*/
#define BROTLI_BOOL int
/** Portable @c true replacement. */
#define BROTLI_TRUE 1
/** Portable @c false replacement. */
#define BROTLI_FALSE 0
/** @c bool to ::BROTLI_BOOL conversion macros. */
#define TO_BROTLI_BOOL(X) (!!(X) ? BROTLI_TRUE : BROTLI_FALSE)
#define BROTLI_MAKE_UINT64_T(high, low) ((((uint64_t)(high)) << 32) | low)
#define BROTLI_UINT32_MAX (~((uint32_t)0))
#define BROTLI_SIZE_MAX (~((size_t)0))
/**
* Allocating function pointer type.
*
* @param opaque custom memory manager handle provided by client
* @param size requested memory region size; can not be @c 0
* @returns @c 0 in the case of failure
* @returns a valid pointer to a memory region of at least @p size bytes
* long otherwise
*/
typedef void* (*brotli_alloc_func)(void* opaque, size_t size);
/**
* Deallocating function pointer type.
*
* This function @b SHOULD do nothing if @p address is @c 0.
*
* @param opaque custom memory manager handle provided by client
* @param address memory region pointer returned by ::brotli_alloc_func, or @c 0
*/
typedef void (*brotli_free_func)(void* opaque, void* address);
#endif /* BROTLI_COMMON_TYPES_H_ */

554
BaseTools/Source/C/BrotliCompress/tools/bro.c
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@ -1,554 +0,0 @@
/* Copyright 2014 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Example main() function for Brotli library. */
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <Common/BuildVersion.h>
#include "../dec/decode.h"
#include "../enc/encode.h"
#if !defined(_WIN32)
#include <unistd.h>
#else
#include <io.h>
#include <share.h>
#define MAKE_BINARY(FILENO) (_setmode((FILENO), _O_BINARY), (FILENO))
#if !defined(__MINGW32__)
#define STDIN_FILENO MAKE_BINARY(_fileno(stdin))
#define STDOUT_FILENO MAKE_BINARY(_fileno(stdout))
#define S_IRUSR S_IREAD
#define S_IWUSR S_IWRITE
#endif
#define fdopen _fdopen
#define unlink _unlink
#define fopen ms_fopen
#define open ms_open
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
#define fseek _fseeki64
#define ftell _ftelli64
#endif
static FILE* ms_fopen(const char *filename, const char *mode) {
FILE* result = 0;
fopen_s(&result, filename, mode);
return result;
}
static int ms_open(const char *filename, int oflag, int pmode) {
int result = -1;
_sopen_s(&result, filename, oflag | O_BINARY, _SH_DENYNO, pmode);
return result;
}
#endif /* WIN32 */
static int ParseQuality(const char* s, int* quality) {
if (s[0] >= '0' && s[0] <= '9') {
*quality = s[0] - '0';
if (s[1] >= '0' && s[1] <= '9') {
*quality = *quality * 10 + s[1] - '0';
return (s[2] == 0) ? 1 : 0;
}
return (s[1] == 0) ? 1 : 0;
}
return 0;
}
#define UTILITY_NAME "Brotli"
#define UTILITY_MAJOR_VERSION 0
#define UTILITY_MINOR_VERSION 5
#define UTILITY_REVERSION 2
static void ParseArgv(int argc, char **argv,
char **input_path,
char **output_path,
char **dictionary_path,
int *force,
int *quality,
int *gapmem,
int *decompress,
int *repeat,
int *verbose,
int *lgwin) {
int k;
*force = 0;
*input_path = 0;
*output_path = 0;
*repeat = 1;
*verbose = 0;
*lgwin = 22;
{
size_t argv0_len = strlen(argv[0]);
*decompress =
argv0_len >= 5 && strcmp(&argv[0][argv0_len - 5], "unbro") == 0;
}
for (k = 1; k < argc; ++k) {
if (!strcmp("--force", argv[k]) ||
!strcmp("-f", argv[k])) {
if (*force != 0) {
goto error;
}
*force = 1;
continue;
} else if (!strcmp("--decompress", argv[k]) ||
!strcmp("--uncompress", argv[k]) ||
!strcmp("-d", argv[k])) {
*decompress = 1;
continue;
} else if (!strcmp("--verbose", argv[k]) ||
!strcmp("-v", argv[k])) {
if (*verbose != 0) {
goto error;
}
*verbose = 1;
continue;
} else if (!strcmp("--version", argv[k])) {
fprintf(stderr,
"%s Version %d.%d.%d %s\n",
UTILITY_NAME,
UTILITY_MAJOR_VERSION,
UTILITY_MINOR_VERSION,
UTILITY_REVERSION,
__BUILD_VERSION);
exit(1);
}
if (k < argc - 1) {
if (!strcmp("--input", argv[k]) ||
!strcmp("--in", argv[k]) ||
!strcmp("-i", argv[k])) {
if (*input_path != 0) {
goto error;
}
*input_path = argv[k + 1];
++k;
continue;
} else if (!strcmp("--output", argv[k]) ||
!strcmp("--out", argv[k]) ||
!strcmp("-o", argv[k])) {
if (*output_path != 0) {
goto error;
}
*output_path = argv[k + 1];
++k;
continue;
} else if (!strcmp("--custom-dictionary", argv[k])) {
if (*dictionary_path != 0) {
goto error;
}
*dictionary_path = argv[k + 1];
++k;
continue;
} else if (!strcmp("--quality", argv[k]) ||
!strcmp("-q", argv[k])) {
if (!ParseQuality(argv[k + 1], quality)) {
goto error;
}
++k;
continue;
} else if (!strcmp("--repeat", argv[k]) ||
!strcmp("-r", argv[k])) {
if (!ParseQuality(argv[k + 1], repeat)) {
goto error;
}
++k;
continue;
} else if (!strcmp("--window", argv[k]) ||
!strcmp("-w", argv[k])) {
if (!ParseQuality(argv[k + 1], lgwin)) {
goto error;
}
if (*lgwin < 10 || *lgwin >= 25) {
goto error;
}
++k;
continue;
} else if (!strcmp("--gap", argv[k]) ||
!strcmp("-g", argv[k])) {
if (!ParseQuality(argv[k + 1], gapmem)) {
goto error;
}
++k;
continue;
}
}
goto error;
}
return;
error:
fprintf(stderr,
"Usage: %s [--force] [--quality n] [--gap n] [--decompress]"
" [--input filename] [--output filename] [--repeat iters]"
" [--verbose] [--window n] [--custom-dictionary filename]"
" [--version]\n",
argv[0]);
exit(1);
}
static FILE* OpenInputFile(const char* input_path) {
FILE* f;
if (input_path == 0) {
return fdopen(STDIN_FILENO, "rb");
}
f = fopen(input_path, "rb");
if (f == 0) {
perror("fopen");
exit(1);
}
return f;
}
static FILE *OpenOutputFile(const char *output_path, const int force) {
int fd;
if (output_path == 0) {
return fdopen(STDOUT_FILENO, "wb");
}
fd = open(output_path, O_CREAT | (force ? 0 : O_EXCL) | O_WRONLY | O_TRUNC,
S_IRUSR | S_IWUSR);
if (fd < 0) {
if (!force) {
struct stat statbuf;
if (stat(output_path, &statbuf) == 0) {
fprintf(stderr, "output file exists\n");
exit(1);
}
}
perror("open");
exit(1);
}
return fdopen(fd, "wb");
}
static int64_t FileSize(const char *path) {
FILE *f = fopen(path, "rb");
int64_t retval;
if (f == NULL) {
return -1;
}
if (fseek(f, 0L, SEEK_END) != 0) {
fclose(f);
return -1;
}
retval = ftell(f);
if (fclose(f) != 0) {
return -1;
}
return retval;
}
/* Brotli specified memory allocate function */
static void *BrAlloc (void *memsize, size_t size) {
*(int64_t *)memsize += size;
return malloc(size);
}
/* Brotli specified memory free function */
static void BrFree (void *memsize, void *ptr) {
free(ptr);
}
/* Result ownersip is passed to caller.
|*dictionary_size| is set to resulting buffer size. */
static uint8_t* ReadDictionary(const char* path, size_t* dictionary_size, void *memsize) {
static const int kMaxDictionarySize = (1 << 24) - 16;
FILE *f = fopen(path, "rb");
int64_t file_size_64;
uint8_t* buffer;
size_t bytes_read;
if (f == NULL) {
perror("fopen");
exit(1);
}
file_size_64 = FileSize(path);
if (file_size_64 == -1) {
fprintf(stderr, "could not get size of dictionary file");
exit(1);
}
if (file_size_64 > kMaxDictionarySize) {
fprintf(stderr, "dictionary is larger than maximum allowed: %d\n",
kMaxDictionarySize);
exit(1);
}
*dictionary_size = (size_t)file_size_64;
buffer = (uint8_t *)BrAlloc(memsize, *dictionary_size);
if (!buffer) {
fprintf(stderr, "could not read dictionary: out of memory\n");
exit(1);
}
bytes_read = fread(buffer, sizeof(uint8_t), *dictionary_size, f);
if (bytes_read != *dictionary_size) {
fprintf(stderr, "could not read dictionary\n");
exit(1);
}
fclose(f);
return buffer;
}
static const size_t kFileBufferSize = 65536;
static int Decompress(FILE* fin, FILE* fout, const char* dictionary_path, void *memsize) {
/* Dictionary should be kept during first rounds of decompression. */
uint8_t* dictionary = NULL;
uint8_t* input;
uint8_t* output;
size_t total_out;
size_t available_in;
const uint8_t* next_in;
size_t available_out = kFileBufferSize;
uint8_t* next_out;
BrotliResult result = BROTLI_RESULT_ERROR;
BrotliState* s = BrotliCreateState(BrAlloc, BrFree, memsize);
if (!s) {
fprintf(stderr, "out of memory\n");
return 0;
}
if (dictionary_path != NULL) {
size_t dictionary_size = 0;
dictionary = ReadDictionary(dictionary_path, &dictionary_size, memsize);
BrotliSetCustomDictionary(dictionary_size, dictionary, s);
}
input = (uint8_t*)BrAlloc(memsize, kFileBufferSize);
output = (uint8_t*)BrAlloc(memsize, kFileBufferSize);
if (!input || !output) {
fprintf(stderr, "out of memory\n");
goto end;
}
next_out = output;
result = BROTLI_RESULT_NEEDS_MORE_INPUT;
while (1) {
if (result == BROTLI_RESULT_NEEDS_MORE_INPUT) {
if (feof(fin)) {
break;
}
available_in = fread(input, 1, kFileBufferSize, fin);
next_in = input;
if (ferror(fin)) {
break;
}
} else if (result == BROTLI_RESULT_NEEDS_MORE_OUTPUT) {
fwrite(output, 1, kFileBufferSize, fout);
if (ferror(fout)) {
break;
}
available_out = kFileBufferSize;
next_out = output;
} else {
break; /* Error or success. */
}
result = BrotliDecompressStream(&available_in, &next_in,
&available_out, &next_out, &total_out, s);
}
if (next_out != output) {
fwrite(output, 1, (size_t)(next_out - output), fout);
}
if ((result == BROTLI_RESULT_NEEDS_MORE_OUTPUT) || ferror(fout)) {
fprintf(stderr, "failed to write output\n");
} else if (result != BROTLI_RESULT_SUCCESS) { /* Error or needs more input. */
fprintf(stderr, "corrupt input\n");
}
end:
BrFree(memsize, dictionary);
BrFree(memsize, input);
BrFree(memsize, output);
BrotliDestroyState(s);
return (result == BROTLI_RESULT_SUCCESS) ? 1 : 0;
}
static int Compress(int quality, int lgwin, FILE* fin, FILE* fout,
const char *dictionary_path, void *memsize) {
BrotliEncoderState* s = BrotliEncoderCreateInstance(BrAlloc, BrFree, memsize);
uint8_t* buffer = (uint8_t*)BrAlloc(memsize, kFileBufferSize << 1);
uint8_t* input = buffer;
uint8_t* output = buffer + kFileBufferSize;
size_t available_in = 0;
const uint8_t* next_in = NULL;
size_t available_out = kFileBufferSize;
uint8_t* next_out = output;
int is_eof = 0;
int is_ok = 1;
if (!s || !buffer) {
is_ok = 0;
goto finish;
}
BrotliEncoderSetParameter(s, BROTLI_PARAM_QUALITY, (uint32_t)quality);
BrotliEncoderSetParameter(s, BROTLI_PARAM_LGWIN, (uint32_t)lgwin);
if (dictionary_path != NULL) {
size_t dictionary_size = 0;
uint8_t* dictionary = ReadDictionary(dictionary_path, &dictionary_size, memsize);
BrotliEncoderSetCustomDictionary(s, dictionary_size, dictionary);
BrFree(memsize, dictionary);
}
while (1) {
if (available_in == 0 && !is_eof) {
available_in = fread(input, 1, kFileBufferSize, fin);
next_in = input;
if (ferror(fin)) break;
is_eof = feof(fin);
}
if (!BrotliEncoderCompressStream(s,
is_eof ? BROTLI_OPERATION_FINISH : BROTLI_OPERATION_PROCESS,
&available_in, &next_in, &available_out, &next_out, NULL)) {
is_ok = 0;
break;
}
if (available_out != kFileBufferSize) {
size_t out_size = kFileBufferSize - available_out;
fwrite(output, 1, out_size, fout);
if (ferror(fout)) break;
available_out = kFileBufferSize;
next_out = output;
}
if (BrotliEncoderIsFinished(s)) break;
}
finish:
BrFree(memsize, buffer);
BrotliEncoderDestroyInstance(s);
if (!is_ok) {
/* Should detect OOM? */
fprintf(stderr, "failed to compress data\n");
return 0;
} else if (ferror(fout)) {
fprintf(stderr, "failed to write output\n");
return 0;
} else if (ferror(fin)) {
fprintf(stderr, "failed to read input\n");
return 0;
}
return 1;
}
#define GAP_MEM_BLOCK 4096
int main(int argc, char** argv) {
char *input_path = 0;
char *output_path = 0;
char *dictionary_path = 0;
int force = 0;
int quality = 11;
int gmem = 1;
int decompress = 0;
int repeat = 1;
int verbose = 0;
int lgwin = 0;
clock_t clock_start;
int i;
int64_t originsize = 0;
int64_t msize = 0;
ParseArgv(argc, argv, &input_path, &output_path, &dictionary_path, &force,
&quality, &gmem, &decompress, &repeat, &verbose, &lgwin);
clock_start = clock();
for (i = 0; i < repeat; ++i) {
FILE* fin = OpenInputFile(input_path);
FILE* fout = OpenOutputFile(output_path, force || repeat);
int is_ok = 0;
if (decompress) {
if (fseek(fin, 16, SEEK_SET) != 0) {
fclose(fin);
return -1;
}
is_ok = Decompress(fin, fout, dictionary_path, (void *)&msize);
} else {
originsize = FileSize(input_path); /* get original file size */
fwrite(&originsize, 1, sizeof(int64_t), fout); /* add in original binary file size */
fwrite(&msize, 1, sizeof(int64_t), fout); /* add in dummy decompression required memory size */
is_ok = Compress(quality, lgwin, fin, fout, dictionary_path, (void *)&msize);
}
if (!is_ok) {
unlink(output_path);
exit(1);
}
if (fclose(fin) != 0) {
perror("fclose");
exit(1);
}
if (fclose(fout) != 0) {
perror("fclose");
exit(1);
}
/* after compression operation then execute decompression operation
to get decompression required memory size. */
if (decompress == 0) {
fin = OpenInputFile(output_path);
fout = tmpfile ();
msize = 0;
if (fseek(fin, 16, SEEK_SET) != 0) {
fclose(fin);
return -1;
}
is_ok = Decompress(fin, fout, dictionary_path, (void *)&msize);
if (!is_ok) {
exit(1);
}
if (fclose(fin) != 0) {
perror("fclose");
exit(1);
}
if (fclose(fout) != 0) {
perror("fclose");
exit(1);
}
fout = fopen(output_path, "rb+"); /* open output_path file and add in head info */
/* seek to the offset of decompression required memory size */
if (fseek(fout, 8, SEEK_SET) != 0) {
fclose(fout);
return -1;
}
msize += gmem * GAP_MEM_BLOCK; /* there is a memory gap between IA32 and X64 environment*/
fwrite(&msize, 1, sizeof(int64_t), fout); /* update final decompression required memory size */
if (fclose(fout) != 0) {
perror("fclose");
exit(1);
}
}
}
if (verbose) {
clock_t clock_end = clock();
double duration = (double)(clock_end - clock_start) / CLOCKS_PER_SEC;
int64_t uncompressed_size;
double uncompressed_bytes_in_MB;
if (duration < 1e-9) {
duration = 1e-9;
}
uncompressed_size = FileSize(decompress ? output_path : input_path);
if (uncompressed_size == -1) {
fprintf(stderr, "failed to determine uncompressed file size\n");
exit(1);
}
uncompressed_bytes_in_MB =
(double)(repeat * uncompressed_size) / (1024.0 * 1024.0);
if (decompress) {
printf("Brotli decompression speed: ");
} else {
printf("Brotli compression speed: ");
}
printf("%g MB/s\n", uncompressed_bytes_in_MB / duration);
}
return 0;
}

1143
BaseTools/Source/C/BrotliCompress/tools/brotli.c Normal file
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107
BaseTools/Source/C/BrotliCompress/tools/brotli.md Normal file
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brotli(1) -- brotli, unbrotli - compress or decompress files
================================================================
SYNOPSIS
--------
`brotli` [*OPTION|FILE*]...
`unbrotli` is equivalent to `brotli --decompress`
DESCRIPTION
-----------
`brotli` is a generic-purpose lossless compression algorithm that compresses
data using a combination of a modern variant of the **LZ77** algorithm, Huffman
coding and 2-nd order context modeling, with a compression ratio comparable to
the best currently available general-purpose compression methods. It is similar
in speed with deflate but offers more dense compression.
`brotli` command line syntax similar to `gzip (1)` and `zstd (1)`.
Unlike `gzip (1)`, source files are preserved by default. It is possible to
remove them after processing by using the `--rm` _option_.
Arguments that look like "`--name`" or "`--name=value`" are _options_. Every
_option_ has a short form "`-x`" or "`-x value`". Multiple short form _options_
could be coalesced:
* "`--decompress --stdout --suffix=.b`" works the same as
* "`-d -s -S .b`" and
* "`-dsS .b`"
`brotli` has 3 operation modes:
* default mode is compression;
* `--decompress` option activates decompression mode;
* `--test` option switches to integrity test mode; this option is equivalent to
"`--decompress --stdout`" except that the decompressed data is discarded
instead of being written to standard output.
Every non-option argument is a _file_ entry. If no _files_ are given or _file_
is "`-`", `brotli` reads from standard input. All arguments after "`--`" are
_file_ entries.
Unless `--stdout` or `--output` is specified, _files_ are written to a new file
whose name is derived from the source _file_ name:
* when compressing, a suffix is appended to the source filename to
get the target filename
* when decompressing, a suffix is removed from the source filename to
get the target filename
Default suffix is `.br`, but it could be specified with `--suffix` option.
Conflicting or duplicate _options_ are not allowed.
OPTIONS
-------
* `-#`:
compression level (0-9); bigger values cause denser, but slower compression
* `-c`, `--stdout`:
write on standard output
* `-d`, `--decompress`:
decompress mode
* `-f`, `--force`:
force output file overwrite
* `-h`, `--help`:
display this help and exit
* `-j`, `--rm`:
remove source file(s); `gzip (1)`-like behaviour
* `-k`, `--keep`:
keep source file(s); `zstd (1)`-like behaviour
* `-n`, `--no-copy-stat`:
do not copy source file(s) attributes
* `-o FILE`, `--output=FILE`
output file; valid only if there is a single input entry
* `-q NUM`, `--quality=NUM`:
compression level (0-11); bigger values cause denser, but slower compression
* `-t`, `--test`:
test file integrity mode
* `-v`, `--verbose`:
increase output verbosity
* `-w NUM`, `--lgwin=NUM`:
set LZ77 window size (0, 10-24) (default: 22); window size is
`(2**NUM - 16)`; 0 lets compressor decide over the optimal value; bigger
windows size improve density; decoder might require up to window size
memory to operate
* `-S SUF`, `--suffix=SUF`:
output file suffix (default: `.br`)
* `-V`, `--version`:
display version and exit
* `-Z`, `--best`:
use best compression level (default); same as "`-q 11`"
SEE ALSO
--------
`brotli` file format is defined in
[RFC 7932](https://www.ietf.org/rfc/rfc7932.txt).
`brotli` is open-sourced under the
[MIT License](https://opensource.org/licenses/MIT).
Mailing list: https://groups.google.com/forum/#!forum/brotli
BUGS
----
Report bugs at: https://github.com/google/brotli/issues

14
BaseTools/Source/C/BrotliCompress/tools/version.h
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@ -1,14 +0,0 @@
/* Copyright 2015 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Defines a common version string used by all of the brotli tools. */
#ifndef BROTLI_TOOLS_VERSION_H_
#define BROTLI_TOOLS_VERSION_H_
#define BROTLI_VERSION "0.5.2"
#endif /* BROTLI_TOOLS_VERSION_H_ */