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ffmpeg.wasm-core
Commit 99971952 authored by Thilo Borgmann's avatar Thilo Borgmann Committed by Carl Eugen Hoyos
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Add MPEG-4 Audio Lossless Coding (ALS) decoder. 

Patch by Thilo Borgmann, thilo D borgmann A googlemail

Originally committed as revision 20517 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 24026a2d
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Changelog
View file @ 99971952
......@@ -41,6 +41,7 @@ version <next>:
- Atrac1 decoder
- MD STUDIO audio demuxer
- RF64 support in WAV demuxer
- MPEG-4 Audio Lossless Coding (ALS) decoder
......
doc/general.texi
View file @ 99971952
......@@ -569,6 +569,7 @@ following image formats are supported:
@item MP2 (MPEG audio layer 2) @tab IX @tab IX
@item MP3 (MPEG audio layer 3) @tab E @tab IX
@tab encoding supported through external library LAME, ADU MP3 and MP3onMP4 also supported
@item MPEG-4 Audio Lossless Coding (ALS) @tab @tab X
@item Musepack SV7 @tab @tab X
@item Musepack SV8 @tab @tab X
@item Nellymoser Asao @tab X @tab X
......
libavcodec/Makefile
View file @ 99971952
......@@ -51,6 +51,7 @@ OBJS-$(CONFIG_AC3_DECODER) += ac3dec.o ac3tab.o \
OBJS-$(CONFIG_AC3_ENCODER) += ac3enc.o ac3tab.o ac3.o
OBJS-$(CONFIG_ALAC_DECODER) += alac.o
OBJS-$(CONFIG_ALAC_ENCODER) += alacenc.o
OBJS-$(CONFIG_ALS_DECODER) += alsdec.o
OBJS-$(CONFIG_AMV_DECODER) += sp5xdec.o mjpegdec.o mjpeg.o
OBJS-$(CONFIG_APE_DECODER) += apedec.o
OBJS-$(CONFIG_ASV1_DECODER) += asv1.o mpeg12data.o
......
libavcodec/allcodecs.c
View file @ 99971952
......@@ -200,6 +200,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (AAC, aac);
REGISTER_ENCDEC (AC3, ac3);
REGISTER_ENCDEC (ALAC, alac);
REGISTER_DECODER (ALS, als);
REGISTER_DECODER (APE, ape);
REGISTER_DECODER (ATRAC1, atrac1);
REGISTER_DECODER (ATRAC3, atrac3);
......
libavcodec/als_data.h 0 → 100644
View file @ 99971952
/*
* ALS header file for common data
* Copyright (c) 2009 Thilo Borgmann <thilo.borgmann _at_ googlemail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_ALS_DATA_H
#define AVCODEC_ALS_DATA_H
/**
* @file libavcodec/als_data.h
* MPEG-4 ALS common data tables
* @author Thilo Borgmann <thilo.borgmann _at_ googlemail.com>
*/
#include <stdint.h>
/** Rice parameters and corresponding index offsets for decoding the
* indices of scaled PARCOR values. The table choosen is set globally
* by the encoder and stored in ALSSpecificConfig.
*/
static const int8_t parcor_rice_table[3][20][2] = {
{ {-52, 4}, {-29, 5}, {-31, 4}, { 19, 4}, {-16, 4},
{ 12, 3}, { -7, 3}, { 9, 3}, { -5, 3}, { 6, 3},
{ -4, 3}, { 3, 3}, { -3, 2}, { 3, 2}, { -2, 2},
{ 3, 2}, { -1, 2}, { 2, 2}, { -1, 2}, { 2, 2} },
{ {-58, 3}, {-42, 4}, {-46, 4}, { 37, 5}, {-36, 4},
{ 29, 4}, {-29, 4}, { 25, 4}, {-23, 4}, { 20, 4},
{-17, 4}, { 16, 4}, {-12, 4}, { 12, 3}, {-10, 4},
{ 7, 3}, { -4, 4}, { 3, 3}, { -1, 3}, { 1, 3} },
{ {-59, 3}, {-45, 5}, {-50, 4}, { 38, 4}, {-39, 4},
{ 32, 4}, {-30, 4}, { 25, 3}, {-23, 3}, { 20, 3},
{-20, 3}, { 16, 3}, {-13, 3}, { 10, 3}, { -7, 3},
{ 3, 3}, { 0, 3}, { -1, 3}, { 2, 3}, { -1, 2} }
};
/** Scaled PARCOR values used for the first two PARCOR coefficients.
* To be indexed by the Rice coded indices.
* Generated by: parcor_scaled_values[i] = 32 + ((i * (i+1)) << 7) - (1 << 20)
* Actual values are divided by 32 in order to be stored in 16 bits.
*/
static const int16_t parcor_scaled_values[] = {
-1048544 / 32, -1048288 / 32, -1047776 / 32, -1047008 / 32,
-1045984 / 32, -1044704 / 32, -1043168 / 32, -1041376 / 32,
-1039328 / 32, -1037024 / 32, -1034464 / 32, -1031648 / 32,
-1028576 / 32, -1025248 / 32, -1021664 / 32, -1017824 / 32,
-1013728 / 32, -1009376 / 32, -1004768 / 32, -999904 / 32,
-994784 / 32, -989408 / 32, -983776 / 32, -977888 / 32,
-971744 / 32, -965344 / 32, -958688 / 32, -951776 / 32,
-944608 / 32, -937184 / 32, -929504 / 32, -921568 / 32,
-913376 / 32, -904928 / 32, -896224 / 32, -887264 / 32,
-878048 / 32, -868576 / 32, -858848 / 32, -848864 / 32,
-838624 / 32, -828128 / 32, -817376 / 32, -806368 / 32,
-795104 / 32, -783584 / 32, -771808 / 32, -759776 / 32,
-747488 / 32, -734944 / 32, -722144 / 32, -709088 / 32,
-695776 / 32, -682208 / 32, -668384 / 32, -654304 / 32,
-639968 / 32, -625376 / 32, -610528 / 32, -595424 / 32,
-580064 / 32, -564448 / 32, -548576 / 32, -532448 / 32,
-516064 / 32, -499424 / 32, -482528 / 32, -465376 / 32,
-447968 / 32, -430304 / 32, -412384 / 32, -394208 / 32,
-375776 / 32, -357088 / 32, -338144 / 32, -318944 / 32,
-299488 / 32, -279776 / 32, -259808 / 32, -239584 / 32,
-219104 / 32, -198368 / 32, -177376 / 32, -156128 / 32,
-134624 / 32, -112864 / 32, -90848 / 32, -68576 / 32,
-46048 / 32, -23264 / 32, -224 / 32, 23072 / 32,
46624 / 32, 70432 / 32, 94496 / 32, 118816 / 32,
143392 / 32, 168224 / 32, 193312 / 32, 218656 / 32,
244256 / 32, 270112 / 32, 296224 / 32, 322592 / 32,
349216 / 32, 376096 / 32, 403232 / 32, 430624 / 32,
458272 / 32, 486176 / 32, 514336 / 32, 542752 / 32,
571424 / 32, 600352 / 32, 629536 / 32, 658976 / 32,
688672 / 32, 718624 / 32, 748832 / 32, 779296 / 32,
810016 / 32, 840992 / 32, 872224 / 32, 903712 / 32,
935456 / 32, 967456 / 32, 999712 / 32, 1032224 / 32
};
#endif /* AVCODEC_ALS_DATA_H */
libavcodec/alsdec.c 0 → 100644
View file @ 99971952
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