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 
00138     { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') }, /* Apple MPEG-1 Camcorder */
00139     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
00140     { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') }, /* Apple MPEG-2 Camcorder */
00141     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
00142     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
00143     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
00144     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
00145     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
00146     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
00147     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
00148     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
00149     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
00150     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
00151     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
00152     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
00153     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
00154     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '4') }, /* XDCAM HD422 720p24 CBR */
00155     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
00156     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
00157     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
00158     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
00159     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
00160     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
00161     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
00162     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
00163     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
00164     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
00165     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
00166     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
00167     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
00168     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
00169     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
00170     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
00171     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
00172     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
00173     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
00174     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
00175     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
00176     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
00177     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
00178 
00179     { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
00180 
00181     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
00182     { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
00183     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
00184     { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },
00185 
00186     { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
00187     { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
00188 
00189     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
00190     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
00191     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
00192     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
00193     { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
00194     { CODEC_ID_DPX,   MKTAG('d', 'p', 'x', ' ') }, /* DPX */
00195 
00196     { CODEC_ID_NONE, 0 },
00197 };
00198 
00199 const AVCodecTag codec_movaudio_tags[] = {
00200     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
00201     { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
00202     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
00203     { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
00204     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
00205     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
00206     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
00207     { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
00208     { CODEC_ID_PCM_F32LE, MKTAG('f', 'l', '3', '2') },
00209     { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
00210     { CODEC_ID_PCM_F64LE, MKTAG('f', 'l', '6', '4') },
00211     { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
00212     { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
00213     { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
00214     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
00215     { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */
00216 
00217     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
00218 
00219     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
00220     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
00221 
00222     { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
00223     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */
00224 
00225     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
00226     { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
00227 
00228 /*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00229 
00230     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
00231     { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
00232     { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */
00233 
00234     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
00235     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
00236 
00237     { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
00238     { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
00239 
00240     { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
00241     { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
00242     { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
00243 
00244     { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
00245 
00246     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
00247     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
00248 
00249     { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
00250 
00251     { CODEC_ID_NONE, 0 },
00252 };
00253 
00254 const AVCodecTag ff_codec_movsubtitle_tags[] = {
00255     { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
00256     { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
00257     { CODEC_ID_NONE, 0 },
00258 };
00259 
00260 /* map numeric codes from mdhd atom to ISO 639 */
00261 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
00262 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
00263 /* deprecated by putting the code as 3*5bit ascii */
00264 static const char mov_mdhd_language_map[][4] = {
00265     /* 0-9 */
00266     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
00267     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
00268     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",
00269     "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",
00270     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
00271     /*?*/
00272     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",
00273     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
00274     "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",
00275     /*                   roman? arabic? */
00276     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
00277     /*==rundi?*/
00278        "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",
00279     /* 100 */
00280        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00281        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00282        "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",
00283     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
00284 };
00285 
00286 int ff_mov_iso639_to_lang(const char lang[4], int mp4)
00287 {
00288     int i, code = 0;
00289 
00290     /* old way, only for QT? */
00291     for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
00292         if (!strcmp(lang, mov_mdhd_language_map[i]))
00293             return i;
00294     }
00295     /* XXX:can we do that in mov too? */
00296     if (!mp4)
00297         return -1;
00298     /* handle undefined as such */
00299     if (lang[0] == '\0')
00300         lang = "und";
00301     /* 5bit ascii */
00302     for (i = 0; i < 3; i++) {
00303         uint8_t c = lang[i];
00304         c -= 0x60;
00305         if (c > 0x1f)
00306             return -1;
00307         code <<= 5;
00308         code |= c;
00309     }
00310     return code;
00311 }
00312 
00313 int ff_mov_lang_to_iso639(unsigned code, char to[4])
00314 {
00315     int i;
00316     memset(to, 0, 4);
00317     /* is it the mangled iso code? */
00318     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
00319     if (code > 138) {
00320         for (i = 2; i >= 0; i--) {
00321             to[i] = 0x60 + (code & 0x1f);
00322             code >>= 5;
00323         }
00324         return 1;
00325     }
00326     /* old fashion apple lang code */
00327     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
00328         return 0;
00329     if (!mov_mdhd_language_map[code][0])
00330         return 0;
00331     memcpy(to, mov_mdhd_language_map[code], 4);
00332     return 1;
00333 }
00334 
00335 int ff_mp4_read_descr_len(ByteIOContext *pb)
00336 {
00337     int len = 0;
00338     int count = 4;
00339     while (count--) {
00340         int c = get_byte(pb);
00341         len = (len << 7) | (c & 0x7f);
00342         if (!(c & 0x80))
00343             break;
00344     }
00345     return len;
00346 }
00347 
00348 int ff_mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
00349 {
00350     int len;
00351     *tag = get_byte(pb);
00352     len = ff_mp4_read_descr_len(pb);
00353     dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
00354     return len;
00355 }
00356 
00357 static const AVCodecTag mp4_audio_types[] = {
00358     { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
00359     { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
00360     { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
00361     { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
00362     { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
00363     { CODEC_ID_NONE,   AOT_NULL },
00364 };
00365 
00366 int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, ByteIOContext *pb)
00367 {
00368     int len, tag;
00369     int object_type_id = get_byte(pb);
00370     get_byte(pb); /* stream type */
00371     get_be24(pb); /* buffer size db */
00372     get_be32(pb); /* max bitrate */
00373     get_be32(pb); /* avg bitrate */
00374 
00375     st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
00376     dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
00377     len = ff_mp4_read_descr(fc, pb, &tag);
00378     if (tag == MP4DecSpecificDescrTag) {
00379         dprintf(fc, "Specific MPEG4 header len=%d\n", len);
00380         if((uint64_t)len > (1<<30))
00381             return -1;
00382         av_free(st->codec->extradata);
00383         st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
00384         if (!st->codec->extradata)
00385             return AVERROR(ENOMEM);
00386         get_buffer(pb, st->codec->extradata, len);
00387         st->codec->extradata_size = len;
00388         if (st->codec->codec_id == CODEC_ID_AAC) {
00389             MPEG4AudioConfig cfg;
00390             ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
00391                                      st->codec->extradata_size);
00392             st->codec->channels = cfg.channels;
00393             if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
00394                 st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
00395             else if (cfg.ext_sample_rate)
00396                 st->codec->sample_rate = cfg.ext_sample_rate;
00397             else
00398                 st->codec->sample_rate = cfg.sample_rate;
00399             dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
00400                     "sample rate %d ext sample rate %d\n", st->codec->channels,
00401                     cfg.object_type, cfg.ext_object_type,
00402                     cfg.sample_rate, cfg.ext_sample_rate);
00403             if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
00404                                                         cfg.object_type)))
00405                 st->codec->codec_id = CODEC_ID_AAC;
00406         }
00407     }
00408     return 0;
00409 }