FFmpeg: libavformat/isom.c Source File

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