release/src/router/ffmpeg/libavformat/isom.c

   1 /*
   2  * ISO Media common code
   3  * Copyright (c) 2001 Fabrice Bellard
   4  * Copyright (c) 2002 Francois Revol <revol@free.fr>
   5  * Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
   6  *
   7  * This file is part of FFmpeg.
   8  *
   9  * FFmpeg is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * FFmpeg is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with FFmpeg; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include "avformat.h"
  25 #include "riff.h"
  26 #include "isom.h"
  27
  28 /* http://www.mp4ra.org */
  29 /* ordered by muxing preference */
  30 const AVCodecTag ff_mp4_obj_type[] = {
  31     { CODEC_ID_MOV_TEXT  , 0x08 },
  32     { CODEC_ID_MPEG4     , 0x20 },
  33     { CODEC_ID_H264      , 0x21 },
  34     { CODEC_ID_AAC       , 0x40 },
  35     { CODEC_ID_MP4ALS    , 0x40 }, /* 14496-3 ALS */
  36     { CODEC_ID_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
  37     { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
  38     { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
  39     { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
  40     { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
  41     { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
  42     { CODEC_ID_AAC       , 0x66 }, /* MPEG2 AAC Main */
  43     { CODEC_ID_AAC       , 0x67 }, /* MPEG2 AAC Low */
  44     { CODEC_ID_AAC       , 0x68 }, /* MPEG2 AAC SSR */
  45     { CODEC_ID_MP3       , 0x69 }, /* 13818-3 */
  46     { CODEC_ID_MP2       , 0x69 }, /* 11172-3 */
  47     { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
  48     { CODEC_ID_MP3       , 0x6B }, /* 11172-3 */
  49     { CODEC_ID_MJPEG     , 0x6C }, /* 10918-1 */
  50     { CODEC_ID_PNG       , 0x6D },
  51     { CODEC_ID_JPEG2000  , 0x6E }, /* 15444-1 */
  52     { CODEC_ID_VC1       , 0xA3 },
  53     { CODEC_ID_DIRAC     , 0xA4 },
  54     { CODEC_ID_AC3       , 0xA5 },
  55     { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
  56     { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
  57     { CODEC_ID_QCELP     , 0xE1 },
  58     { CODEC_ID_NONE      ,    0 },
  59 };
  60
  61 const AVCodecTag codec_movvideo_tags[] = {
  62 /*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
  63
  64     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
  65     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
  66     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
  67     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
  68     { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */
  69
  70     { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
  71     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
  72
  73     { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
  74     { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
  75     { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
  76 /*  { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
  77     { CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
  78     { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
  79
  80     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
  81     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
  82     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
  83     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
  84
  85     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
  86     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
  87     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
  88     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
  89
  90     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
  91     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
  92
  93     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
  94     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
  95     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
  96     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
  97     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
  98     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
  99     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
 100     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
 101     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
 102     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
 103     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },
 104     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },
 105     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
 106     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
 107     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */
 108
 109     { CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
 110     { CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
 111     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
 112     { CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
 113     { CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
 114     { CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
 115     { CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },
 116     { CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
 117
 118     { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },
 119
 120     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
 121
 122     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
 123     { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') },
 124     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
 125     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
 126     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
 127     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
 128     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
 129     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
 130     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
 131     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
 132     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
 133     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
 134     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
 135     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
 136     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
 137     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
 138     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
 139     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
 140     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
 141     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
 142     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
 143     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
 144     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
 145     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
 146     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
 147     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
 148     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
 149     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
 150     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
 151     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
 152     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
 153     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
 154     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
 155     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
 156     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
 157     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
 158     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
 159     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
 160     { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') },
 161
 162     { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
 163
 164     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
 165     { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
 166     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
 167     { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },
 168
 169     { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
 170     { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
 171
 172     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
 173     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
 174     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
 175     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
 176     { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
 177     { CODEC_ID_DPX,   MKTAG('d', 'p', 'x', ' ') }, /* DPX */
 178
 179     { CODEC_ID_NONE, 0 },
 180 };
 181
 182 const AVCodecTag codec_movaudio_tags[] = {
 183     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
 184     { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
 185     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
 186     { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
 187     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
 188     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
 189     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
 190     { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
 191     { CODEC_ID_PCM_F32LE, MKTAG('f', 'l', '3', '2') },
 192     { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
 193     { CODEC_ID_PCM_F64LE, MKTAG('f', 'l', '6', '4') },
 194     { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
 195     { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
 196     { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
 197     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
 198     { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */
 199
 200     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
 201
 202     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
 203     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
 204
 205     { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
 206     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */
 207
 208     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
 209     { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
 210
 211 /*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
 212
 213     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
 214     { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
 215     { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */
 216
 217     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
 218     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
 219
 220     { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
 221     { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
 222
 223     { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
 224     { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
 225     { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
 226
 227     { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
 228
 229     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
 230     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
 231
 232     { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
 233
 234     { CODEC_ID_NONE, 0 },
 235 };
 236
 237 const AVCodecTag ff_codec_movsubtitle_tags[] = {
 238     { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
 239     { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
 240     { CODEC_ID_NONE, 0 },
 241 };
 242
 243 /* map numeric codes from mdhd atom to ISO 639 */
 244 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
 245 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
 246 /* deprecated by putting the code as 3*5bit ascii */
 247 static const char mov_mdhd_language_map[][4] = {
 248     /* 0-9 */
 249     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
 250     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
 251     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",
 252     "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",
 253     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
 254     /*?*/
 255     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",
 256     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
 257     "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",
 258     /*                   roman? arabic? */
 259     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
 260     /*==rundi?*/
 261        "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",
 262     /* 100 */
 263        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
 264        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
 265        "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",
 266     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
 267 };
 268
 269 int ff_mov_iso639_to_lang(const char lang[4], int mp4)
 270 {
 271     int i, code = 0;
 272
 273     /* old way, only for QT? */
 274     for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
 275         if (!strcmp(lang, mov_mdhd_language_map[i]))
 276             return i;
 277     }
 278     /* XXX:can we do that in mov too? */
 279     if (!mp4)
 280         return -1;
 281     /* handle undefined as such */
 282     if (lang[0] == '\0')
 283         lang = "und";
 284     /* 5bit ascii */
 285     for (i = 0; i < 3; i++) {
 286         uint8_t c = lang[i];
 287         c -= 0x60;
 288         if (c > 0x1f)
 289             return -1;
 290         code <<= 5;
 291         code |= c;
 292     }
 293     return code;
 294 }
 295
 296 int ff_mov_lang_to_iso639(unsigned code, char to[4])
 297 {
 298     int i;
 299     memset(to, 0, 4);
 300     /* is it the mangled iso code? */
 301     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
 302     if (code > 138) {
 303         for (i = 2; i >= 0; i--) {
 304             to[i] = 0x60 + (code & 0x1f);
 305             code >>= 5;
 306         }
 307         return 1;
 308     }
 309     /* old fashion apple lang code */
 310     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
 311         return 0;
 312     if (!mov_mdhd_language_map[code][0])
 313         return 0;
 314     memcpy(to, mov_mdhd_language_map[code], 4);
 315     return 1;
 316 }