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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 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_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
00036     { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
00037     { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
00038     { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
00039     { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
00040     { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
00041     { CODEC_ID_AAC       , 0x66 }, /* MPEG2 AAC Main */
00042     { CODEC_ID_AAC       , 0x67 }, /* MPEG2 AAC Low */
00043     { CODEC_ID_AAC       , 0x68 }, /* MPEG2 AAC SSR */
00044     { CODEC_ID_MP3       , 0x69 }, /* 13818-3 */
00045     { CODEC_ID_MP2       , 0x69 }, /* 11172-3 */
00046     { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
00047     { CODEC_ID_MP3       , 0x6B }, /* 11172-3 */
00048     { CODEC_ID_MJPEG     , 0x6C }, /* 10918-1 */
00049     { CODEC_ID_PNG       , 0x6D },
00050     { CODEC_ID_JPEG2000  , 0x6E }, /* 15444-1 */
00051     { CODEC_ID_VC1       , 0xA3 },
00052     { CODEC_ID_DIRAC     , 0xA4 },
00053     { CODEC_ID_AC3       , 0xA5 },
00054     { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
00055     { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
00056     { CODEC_ID_QCELP     , 0xE1 },
00057     { 0, 0 },
00058 };
00059 
00060 const AVCodecTag codec_movvideo_tags[] = {
00061 /*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
00062 
00063     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
00064 /*  { CODEC_ID_RAWVIDEO, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */
00065     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
00066     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
00067 
00068     { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
00069     { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
00070     { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
00071 /*  { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
00072     { CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
00073     { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
00074 
00075     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
00076     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
00077     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
00078     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
00079 
00080     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
00081     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00082     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
00083     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
00084 
00085     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
00086     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
00087 
00088     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
00089     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
00090     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
00091     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
00092     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
00093     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
00094     { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
00095     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
00096     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
00097     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
00098     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
00099     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */
00100 
00101     { CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
00102     { CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
00103     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
00104     { CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
00105     { CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
00106     { CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
00107     { CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },
00108     { CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
00109 
00110     { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },
00111 
00112     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
00113 
00114     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
00115     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
00116     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
00117     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
00118     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
00119     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
00120     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
00121     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
00122     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
00123     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
00124     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
00125     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
00126     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
00127     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
00128     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
00129     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
00130     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
00131     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
00132     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
00133     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
00134     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
00135     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
00136     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
00137     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
00138     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
00139     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
00140     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
00141     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
00142     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
00143     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
00144     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
00145     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
00146     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
00147     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
00148     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
00149     { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
00150     { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
00151 
00152     { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
00153 
00154     { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
00155     { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
00156     { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
00157     { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },
00158 
00159     { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
00160     { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
00161 
00162     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
00163     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
00164     { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
00165 
00166     { CODEC_ID_NONE, 0 },
00167 };
00168 
00169 const AVCodecTag codec_movaudio_tags[] = {
00170     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
00171     { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
00172     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
00173     { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
00174     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
00175     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
00176     { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
00177     { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
00178     { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
00179     { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
00180     { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
00181     { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
00182     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
00183     { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */
00184 
00185     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
00186 
00187     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
00188     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
00189 
00190     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
00191     { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
00192 
00193 /*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
00194 
00195     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
00196     { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
00197 
00198     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
00199     { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
00200 
00201     { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
00202     { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
00203 
00204     { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
00205     { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
00206 
00207     { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
00208 
00209     { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
00210     { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
00211 
00212     { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
00213 
00214     { CODEC_ID_NONE, 0 },
00215 };
00216 
00217 const AVCodecTag ff_codec_movsubtitle_tags[] = {
00218     { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
00219     { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
00220     { CODEC_ID_NONE, 0 },
00221 };
00222 
00223 /* map numeric codes from mdhd atom to ISO 639 */
00224 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
00225 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
00226 /* deprecated by putting the code as 3*5bit ascii */
00227 static const char * const mov_mdhd_language_map[] = {
00228     /* 0-9 */
00229     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
00230     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
00231     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",  NULL,
00232     "fo ",  NULL, "rus", "chi",  NULL, "iri", "alb", "ron", "ces", "slk",
00233     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
00234     /*?*/
00235     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",  NULL, "pus",
00236     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
00237     "pa ", "ori", "mal", "kan", "tam", "tel",  NULL, "bur", "khm", "lao",
00238     /*                   roman? arabic? */
00239     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
00240     /*==rundi?*/
00241     NULL, "run",  NULL, "mlg", "epo",  NULL,  NULL,  NULL,  NULL,  NULL,
00242     /* 100 */
00243     NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
00244     NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,
00245     NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL, "wel", "baq",
00246     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
00247 };
00248 
00249 int ff_mov_iso639_to_lang(const char *lang, int mp4)
00250 {
00251     int i, code = 0;
00252 
00253     /* old way, only for QT? */
00254     for (i = 0; !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
00255         if (mov_mdhd_language_map[i] && !strcmp(lang, mov_mdhd_language_map[i]))
00256             return i;
00257     }
00258     /* XXX:can we do that in mov too? */
00259     if (!mp4)
00260         return -1;
00261     /* handle undefined as such */
00262     if (lang[0] == '\0')
00263         lang = "und";
00264     /* 5bit ascii */
00265     for (i = 0; i < 3; i++) {
00266         unsigned char c = (unsigned char)lang[i];
00267         if (c < 0x60)
00268             return -1;
00269         if (c > 0x60 + 0x1f)
00270             return -1;
00271         code <<= 5;
00272         code |= (c - 0x60);
00273     }
00274     return code;
00275 }
00276 
00277 int ff_mov_lang_to_iso639(unsigned code, char *to)
00278 {
00279     int i;
00280     /* is it the mangled iso code? */
00281     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
00282     if (code > 138) {
00283         for (i = 2; i >= 0; i--) {
00284             to[i] = 0x60 + (code & 0x1f);
00285             code >>= 5;
00286         }
00287         return 1;
00288     }
00289     /* old fashion apple lang code */
00290     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
00291         return 0;
00292     if (!mov_mdhd_language_map[code])
00293         return 0;
00294     strncpy(to, mov_mdhd_language_map[code], 4);
00295     return 1;
00296 }

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