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 #include "avformat.h"
00025 #include "riff.h"
00026 #include "isom.h"
00027 
00028 /* http://www.mp4ra.org */
00029 /* ordered by muxing preference */
00030 const AVCodecTag ff_mp4_obj_type[] = {
00031     { CODEC_ID_MOV_TEXT  , 0x08 },
00032     { CODEC_ID_MPEG4     , 0x20 },
00033     { CODEC_ID_H264      , 0x21 },
00034     { CODEC_ID_AAC       , 0x40 },
00035     { CODEC_ID_MP4ALS    , 0x40 }, /* 14496-3 ALS */
00036     { CODEC_ID_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
00037     { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
00038     { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
00039     { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
00040     { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
00041     { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
00042     { CODEC_ID_AAC       , 0x66 }, /* MPEG2 AAC Main */
00043     { CODEC_ID_AAC       , 0x67 }, /* MPEG2 AAC Low */
00044     { CODEC_ID_AAC       , 0x68 }, /* MPEG2 AAC SSR */
00045     { CODEC_ID_MP3       , 0x69 }, /* 13818-3 */
00046     { CODEC_ID_MP2       , 0x69 }, /* 11172-3 */
00047     { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
00048     { CODEC_ID_MP3       , 0x6B }, /* 11172-3 */
00049     { CODEC_ID_MJPEG     , 0x6C }, /* 10918-1 */
00050     { CODEC_ID_PNG       , 0x6D },
00051     { CODEC_ID_JPEG2000  , 0x6E }, /* 15444-1 */
00052     { CODEC_ID_VC1       , 0xA3 },
00053     { CODEC_ID_DIRAC     , 0xA4 },
00054     { CODEC_ID_AC3       , 0xA5 },
00055     { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
00056     { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
00057     { CODEC_ID_QCELP     , 0xE1 },
00058     { CODEC_ID_NONE      ,    0 },
00059 };
00060 
00061 const AVCodecTag codec_movvideo_tags[] = {
00062 /*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
00063 
00064     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
00065     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
00066     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
00067     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
00068     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */
00069 
00070     { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
00071     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
00072 
00073     { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
00074     { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
00075     { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
00076 /*  { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
00077     { CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
00078     { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
00079 
00080     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
00081     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
00082     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
00083     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
00084 
00085     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
00086     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00087     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
00088     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
00089 
00090     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
00091     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
00092 
00093     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
00094     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
00095     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
00096     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
00097     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
00098     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
00099     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
00100     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
00101     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
00102     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
00103     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },
00104     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },
00105     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
00106     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
00107     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */
00108 
00109     { CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
00110     { CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
00111     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
00112     { CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
00113     { CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
00114     { CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
00115     { CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },
00116     { CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
00117 
00118     { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },
00119 
00120     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
00121 
00122     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
00123     { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') },
00124     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
00125     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
00126     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
00127     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
00128     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
00129     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
00130     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
00131     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
00132     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
00133     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
00134     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
00135     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
00136     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
00137     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
00138     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
00139     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
00140     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
00141     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
00142     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
00143     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
00144     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
00145     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
00146     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
00147     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
00148     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
00149     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
00150     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
00151     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
00152     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
00153     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
00154     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
00155     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
00156     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
00157     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
00158     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
00159     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
00160     { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') },
00161 
00162     { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
00163 
00164     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
00165     { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
00166     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
00167     { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },
00168 
00169     { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
00170     { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
00171 
00172     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
00173     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
00174     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
00175     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
00176     { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
00177     { CODEC_ID_DPX,   MKTAG('d', 'p', 'x', ' ') }, /* DPX */
00178 
00179     { CODEC_ID_NONE, 0 },
00180 };
00181 
00182 const AVCodecTag codec_movaudio_tags[] = {
00183     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
00184     { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
00185     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
00186     { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
00187     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
00188     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
00189     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
00190     { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
00191     { CODEC_ID_PCM_F32LE, MKTAG('f', 'l', '3', '2') },
00192     { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
00193     { CODEC_ID_PCM_F64LE, MKTAG('f', 'l', '6', '4') },
00194     { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
00195     { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
00196     { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
00197     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
00198     { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */
00199 
00200     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
00201 
00202     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
00203     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
00204 
00205     { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
00206     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */
00207 
00208     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
00209     { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
00210 
00211 /*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00212 
00213     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
00214     { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
00215     { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */
00216 
00217     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
00218     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
00219 
00220     { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
00221     { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
00222 
00223     { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
00224     { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
00225     { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
00226 
00227     { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
00228 
00229     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
00230     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
00231 
00232     { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
00233 
00234     { CODEC_ID_NONE, 0 },
00235 };
00236 
00237 const AVCodecTag ff_codec_movsubtitle_tags[] = {
00238     { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
00239     { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
00240     { CODEC_ID_NONE, 0 },
00241 };
00242 
00243 /* map numeric codes from mdhd atom to ISO 639 */
00244 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
00245 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
00246 /* deprecated by putting the code as 3*5bit ascii */
00247 static const char mov_mdhd_language_map[][4] = {
00248     /* 0-9 */
00249     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
00250     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
00251     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",
00252     "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",
00253     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
00254     /*?*/
00255     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",
00256     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
00257     "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",
00258     /*                   roman? arabic? */
00259     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
00260     /*==rundi?*/
00261        "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",
00262     /* 100 */
00263        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00264        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
00265        "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",
00266     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
00267 };
00268 
00269 int ff_mov_iso639_to_lang(const char lang[4], int mp4)
00270 {
00271     int i, code = 0;
00272 
00273     /* old way, only for QT? */
00274     for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
00275         if (!strcmp(lang, mov_mdhd_language_map[i]))
00276             return i;
00277     }
00278     /* XXX:can we do that in mov too? */
00279     if (!mp4)
00280         return -1;
00281     /* handle undefined as such */
00282     if (lang[0] == '\0')
00283         lang = "und";
00284     /* 5bit ascii */
00285     for (i = 0; i < 3; i++) {
00286         uint8_t c = lang[i];
00287         c -= 0x60;
00288         if (c > 0x1f)
00289             return -1;
00290         code <<= 5;
00291         code |= c;
00292     }
00293     return code;
00294 }
00295 
00296 int ff_mov_lang_to_iso639(unsigned code, char to[4])
00297 {
00298     int i;
00299     memset(to, 0, 4);
00300     /* is it the mangled iso code? */
00301     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
00302     if (code > 138) {
00303         for (i = 2; i >= 0; i--) {
00304             to[i] = 0x60 + (code & 0x1f);
00305             code >>= 5;
00306         }
00307         return 1;
00308     }
00309     /* old fashion apple lang code */
00310     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
00311         return 0;
00312     if (!mov_mdhd_language_map[code][0])
00313         return 0;
00314     memcpy(to, mov_mdhd_language_map[code], 4);
00315     return 1;
00316 }