Libav 0.7.1
libavformat/isom.c
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00001 /*
00002  * ISO Media common code
00003  * Copyright (c) 2001 Fabrice Bellard
00004  * Copyright (c) 2002 Francois Revol <revol@free.fr>
00005  * Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
00006  *
00007  * This file is part of Libav.
00008  *
00009  * Libav is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * Libav is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with Libav; if not, write to the Free Software
00021  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00022  */
00023 
00024 //#define DEBUG
00025 
00026 #include "avformat.h"
00027 #include "internal.h"
00028 #include "isom.h"
00029 #include "riff.h"
00030 #include "libavcodec/mpeg4audio.h"
00031 #include "libavcodec/mpegaudiodata.h"
00032 
00033 /* http://www.mp4ra.org */
00034 /* ordered by muxing preference */
00035 const AVCodecTag ff_mp4_obj_type[] = {
00036     { CODEC_ID_MOV_TEXT  , 0x08 },
00037     { CODEC_ID_MPEG4     , 0x20 },
00038     { CODEC_ID_H264      , 0x21 },
00039     { CODEC_ID_AAC       , 0x40 },
00040     { CODEC_ID_MP4ALS    , 0x40 }, /* 14496-3 ALS */
00041     { CODEC_ID_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
00042     { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
00043     { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
00044     { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
00045     { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
00046     { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
00047     { CODEC_ID_AAC       , 0x66 }, /* MPEG2 AAC Main */
00048     { CODEC_ID_AAC       , 0x67 }, /* MPEG2 AAC Low */
00049     { CODEC_ID_AAC       , 0x68 }, /* MPEG2 AAC SSR */
00050     { CODEC_ID_MP3       , 0x69 }, /* 13818-3 */
00051     { CODEC_ID_MP2       , 0x69 }, /* 11172-3 */
00052     { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
00053     { CODEC_ID_MP3       , 0x6B }, /* 11172-3 */
00054     { CODEC_ID_MJPEG     , 0x6C }, /* 10918-1 */
00055     { CODEC_ID_PNG       , 0x6D },
00056     { CODEC_ID_JPEG2000  , 0x6E }, /* 15444-1 */
00057     { CODEC_ID_VC1       , 0xA3 },
00058     { CODEC_ID_DIRAC     , 0xA4 },
00059     { CODEC_ID_AC3       , 0xA5 },
00060     { CODEC_ID_DTS       , 0xA9 }, /* mp4ra.org */
00061     { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
00062     { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
00063     { CODEC_ID_QCELP     , 0xE1 },
00064     { CODEC_ID_NONE      ,    0 },
00065 };
00066 
00067 const AVCodecTag codec_movvideo_tags[] = {
00068 /*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
00069 
00070     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
00071     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
00072     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
00073     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
00074     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */
00075 
00076     { CODEC_ID_RAWVIDEO, MKTAG('L', '5', '5', '5') },
00077     { CODEC_ID_RAWVIDEO, MKTAG('L', '5', '6', '5') },
00078     { CODEC_ID_RAWVIDEO, MKTAG('B', '5', '6', '5') },
00079     { CODEC_ID_RAWVIDEO, MKTAG('2', '4', 'B', 'G') },
00080     { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },
00081     { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },
00082     { CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },
00083     { CODEC_ID_RAWVIDEO, MKTAG('b', '1', '6', 'g') },
00084     { CODEC_ID_RAWVIDEO, MKTAG('b', '4', '8', 'r') },
00085     { CODEC_ID_RAWVIDEO, MKTAG('D', 'V', 'O', 'O') }, /* Digital Voodoo SD 8 Bit */
00086 
00087     { CODEC_ID_R10K,   MKTAG('R', '1', '0', 'k') }, /* UNCOMPRESSED 10BIT RGB */
00088     { CODEC_ID_R10K,   MKTAG('R', '1', '0', 'g') }, /* UNCOMPRESSED 10BIT RGB */
00089     { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
00090     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
00091 
00092     { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
00093     { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
00094     { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
00095 /*  { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
00096     { CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
00097     { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
00098 
00099     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
00100     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
00101     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
00102     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
00103 
00104     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
00105     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00106     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
00107     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
00108 
00109     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
00110     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
00111 
00112     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
00113     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
00114     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
00115     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
00116     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
00117     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
00118     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
00119     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
00120     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
00121     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
00122     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },
00123     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },
00124     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
00125     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
00126     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */
00127 
00128     { CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
00129     { CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
00130     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
00131     { CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
00132     { CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
00133     { CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
00134     { CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },
00135     { CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
00136 
00137     { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },
00138 
00139     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
00140     { CODEC_ID_H264, MKTAG('a', 'i', '5', '5') }, /* AVC Intra  50 / 1080 interlace */
00141     { CODEC_ID_H264, MKTAG('a', 'i', '5', 'q') }, /* AVC Intra  50 /  720 */
00142     { CODEC_ID_H264, MKTAG('a', 'i', '1', '5') }, /* AVC Intra 100 / 1080 interlace */
00143     { CODEC_ID_H264, MKTAG('a', 'i', '1', 'q') }, /* AVC Intra 100 /  720 */
00144     { CODEC_ID_H264, MKTAG('a', 'i', '1', '2') }, /* AVC Intra 100 / 1080 */
00145 
00146     { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') }, /* Apple MPEG-1 Camcorder */
00147     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
00148     { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') }, /* Apple MPEG-2 Camcorder */
00149     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
00150     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
00151     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
00152     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
00153     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
00154     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
00155     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
00156     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
00157     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
00158     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
00159     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
00160     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
00161     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
00162     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '4') }, /* XDCAM HD422 720p24 CBR */
00163     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '5') }, /* XDCAM HD422 720p25 CBR */
00164     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
00165     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
00166     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
00167     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
00168     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
00169     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
00170     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
00171     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
00172     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
00173     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
00174     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
00175     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
00176     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
00177     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
00178     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
00179     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
00180     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
00181     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
00182     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
00183     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
00184     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
00185     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
00186     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
00187 
00188     { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
00189 
00190     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
00191     { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
00192     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
00193     { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },
00194 
00195     { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
00196     { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
00197 
00198     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
00199     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
00200     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
00201     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
00202     { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
00203     { CODEC_ID_DPX,   MKTAG('d', 'p', 'x', ' ') }, /* DPX */
00204 
00205     { CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'h') }, /* Apple ProRes 422 High Quality */
00206     { CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'n') }, /* Apple ProRes 422 Standard Definition */
00207     { CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 's') }, /* Apple ProRes 422 LT */
00208     { CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'o') }, /* Apple ProRes 422 Proxy */
00209     { CODEC_ID_PRORES, MKTAG('a', 'p', '4', 'h') }, /* Apple ProRes 4444 */
00210 
00211     { CODEC_ID_NONE, 0 },
00212 };
00213 
00214 const AVCodecTag codec_movaudio_tags[] = {
00215     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
00216     { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
00217     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
00218     { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
00219     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
00220     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
00221     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
00222     { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
00223     { CODEC_ID_PCM_F32LE, MKTAG('f', 'l', '3', '2') },
00224     { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
00225     { CODEC_ID_PCM_F64LE, MKTAG('f', 'l', '6', '4') },
00226     { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
00227     { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
00228     { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
00229     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
00230     { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */
00231 
00232     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
00233 
00234     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
00235     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
00236 
00237     { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
00238     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */
00239 
00240     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
00241     { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
00242 
00243 /*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00244 
00245     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
00246     { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
00247     { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */
00248     { CODEC_ID_DTS, MKTAG('d', 't', 's', 'c') }, /* mp4ra.org */
00249     { CODEC_ID_DTS, MKTAG('D', 'T', 'S', ' ') }, /* non-standard */
00250 
00251     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
00252     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
00253 
00254     { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
00255     { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
00256 
00257     { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
00258     { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
00259     { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
00260 
00261     { CODEC_ID_QDMC, MKTAG('Q', 'D', 'M', 'C') }, /* QDMC */
00262     { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
00263 
00264     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
00265     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
00266 
00267     { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
00268 
00269     { CODEC_ID_NONE, 0 },
00270 };
00271 
00272 const AVCodecTag ff_codec_movsubtitle_tags[] = {
00273     { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
00274     { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
00275     { CODEC_ID_NONE, 0 },
00276 };
00277 
00278 /* map numeric codes from mdhd atom to ISO 639 */
00279 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
00280 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
00281 /* deprecated by putting the code as 3*5bit ascii */
00282 static const char mov_mdhd_language_map[][4] = {
00283     /* 0-9 */
00284     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
00285     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
00286     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",
00287     "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",
00288     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
00289     /*?*/
00290     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",
00291     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
00292     "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",
00293     /*                   roman? arabic? */
00294     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
00295     /*==rundi?*/
00296        "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",
00297     /* 100 */
00298        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00299        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00300        "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",
00301     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
00302 };
00303 
00304 int ff_mov_iso639_to_lang(const char lang[4], int mp4)
00305 {
00306     int i, code = 0;
00307 
00308     /* old way, only for QT? */
00309     for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
00310         if (!strcmp(lang, mov_mdhd_language_map[i]))
00311             return i;
00312     }
00313     /* XXX:can we do that in mov too? */
00314     if (!mp4)
00315         return -1;
00316     /* handle undefined as such */
00317     if (lang[0] == '\0')
00318         lang = "und";
00319     /* 5bit ascii */
00320     for (i = 0; i < 3; i++) {
00321         uint8_t c = lang[i];
00322         c -= 0x60;
00323         if (c > 0x1f)
00324             return -1;
00325         code <<= 5;
00326         code |= c;
00327     }
00328     return code;
00329 }
00330 
00331 int ff_mov_lang_to_iso639(unsigned code, char to[4])
00332 {
00333     int i;
00334     memset(to, 0, 4);
00335     /* is it the mangled iso code? */
00336     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
00337     if (code > 138) {
00338         for (i = 2; i >= 0; i--) {
00339             to[i] = 0x60 + (code & 0x1f);
00340             code >>= 5;
00341         }
00342         return 1;
00343     }
00344     /* old fashion apple lang code */
00345     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
00346         return 0;
00347     if (!mov_mdhd_language_map[code][0])
00348         return 0;
00349     memcpy(to, mov_mdhd_language_map[code], 4);
00350     return 1;
00351 }
00352 
00353 int ff_mp4_read_descr_len(AVIOContext *pb)
00354 {
00355     int len = 0;
00356     int count = 4;
00357     while (count--) {
00358         int c = avio_r8(pb);
00359         len = (len << 7) | (c & 0x7f);
00360         if (!(c & 0x80))
00361             break;
00362     }
00363     return len;
00364 }
00365 
00366 int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
00367 {
00368     int len;
00369     *tag = avio_r8(pb);
00370     len = ff_mp4_read_descr_len(pb);
00371     av_dlog(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
00372     return len;
00373 }
00374 
00375 static const AVCodecTag mp4_audio_types[] = {
00376     { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
00377     { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
00378     { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
00379     { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
00380     { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
00381     { CODEC_ID_NONE,   AOT_NULL },
00382 };
00383 
00384 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
00385 {
00386     int len, tag;
00387     int object_type_id = avio_r8(pb);
00388     avio_r8(pb); /* stream type */
00389     avio_rb24(pb); /* buffer size db */
00390     avio_rb32(pb); /* max bitrate */
00391     avio_rb32(pb); /* avg bitrate */
00392 
00393     st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
00394     av_dlog(fc, "esds object type id 0x%02x\n", object_type_id);
00395     len = ff_mp4_read_descr(fc, pb, &tag);
00396     if (tag == MP4DecSpecificDescrTag) {
00397         av_dlog(fc, "Specific MPEG4 header len=%d\n", len);
00398         if((uint64_t)len > (1<<30))
00399             return -1;
00400         av_free(st->codec->extradata);
00401         st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
00402         if (!st->codec->extradata)
00403             return AVERROR(ENOMEM);
00404         avio_read(pb, st->codec->extradata, len);
00405         st->codec->extradata_size = len;
00406         if (st->codec->codec_id == CODEC_ID_AAC) {
00407             MPEG4AudioConfig cfg;
00408             ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
00409                                      st->codec->extradata_size);
00410             st->codec->channels = cfg.channels;
00411             if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
00412                 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
00413             else if (cfg.ext_sample_rate)
00414                 st->codec->sample_rate = cfg.ext_sample_rate;
00415             else
00416                 st->codec->sample_rate = cfg.sample_rate;
00417             av_dlog(fc, "mp4a config channels %d obj %d ext obj %d "
00418                     "sample rate %d ext sample rate %d\n", st->codec->channels,
00419                     cfg.object_type, cfg.ext_object_type,
00420                     cfg.sample_rate, cfg.ext_sample_rate);
00421             if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
00422                                                         cfg.object_type)))
00423                 st->codec->codec_id = CODEC_ID_AAC;
00424         }
00425     }
00426     return 0;
00427 }