Simplify by combining increment with array access.
[FFMpeg-mirror/lagarith.git] / libavformat / isom.c
blob23d716fef31ea3ee7bfaf7214cbe64829828af78
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>
7 * This file is part of FFmpeg.
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.
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.
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
24 #include "avformat.h"
25 #include "riff.h"
26 #include "isom.h"
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_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
36 { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
37 { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
38 { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
39 { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
40 { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
41 { CODEC_ID_AAC , 0x66 }, /* MPEG2 AAC Main */
42 { CODEC_ID_AAC , 0x67 }, /* MPEG2 AAC Low */
43 { CODEC_ID_AAC , 0x68 }, /* MPEG2 AAC SSR */
44 { CODEC_ID_MP3 , 0x69 }, /* 13818-3 */
45 { CODEC_ID_MP2 , 0x69 }, /* 11172-3 */
46 { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
47 { CODEC_ID_MP3 , 0x6B }, /* 11172-3 */
48 { CODEC_ID_MJPEG , 0x6C }, /* 10918-1 */
49 { CODEC_ID_PNG , 0x6D },
50 { CODEC_ID_JPEG2000 , 0x6E }, /* 15444-1 */
51 { CODEC_ID_VC1 , 0xA3 },
52 { CODEC_ID_DIRAC , 0xA4 },
53 { CODEC_ID_AC3 , 0xA5 },
54 { CODEC_ID_VORBIS , 0xDD }, /* non standard, gpac uses it */
55 { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
56 { CODEC_ID_QCELP , 0xE1 },
57 { 0, 0 },
60 const AVCodecTag codec_movvideo_tags[] = {
61 /* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
63 { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
64 { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
65 { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
66 { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
68 { CODEC_ID_V210, MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
70 { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
71 { CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
72 { CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
73 /* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
74 { CODEC_ID_MJPEG, MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
75 { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
77 { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
78 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
79 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
80 { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
82 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
83 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
84 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
85 { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
87 { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
88 { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
90 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
91 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
92 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
93 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
94 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
95 { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
96 { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
97 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
98 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
99 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
100 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },
101 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },
102 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
103 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
104 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */
106 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
107 { CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
108 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
109 { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
110 { CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
111 { CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
112 { CODEC_ID_MSRLE, MKTAG('W', 'R', 'L', 'E') },
113 { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
115 { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },
117 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
119 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
120 { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') },
121 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
122 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
123 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
124 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
125 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
126 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
127 { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
128 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
129 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
130 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
131 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
132 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
133 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
134 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
135 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
136 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
137 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
138 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
139 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
140 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
141 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
142 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
143 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
144 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
145 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
146 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
147 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
148 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
149 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
150 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
151 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
152 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
153 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
154 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
155 { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
156 { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
157 { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') },
159 { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */
161 { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
162 { CODEC_ID_TIFF, MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
163 { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
164 { CODEC_ID_PNG, MKTAG('p', 'n', 'g', ' ') },
166 { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
167 { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },
169 { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
170 { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
171 { CODEC_ID_SGI, MKTAG('s', 'g', 'i', ' ') }, /* SGI */
172 { CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') }, /* DPX */
174 { CODEC_ID_NONE, 0 },
177 const AVCodecTag codec_movaudio_tags[] = {
178 { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
179 { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
180 { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
181 { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
182 { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
183 { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
184 { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
185 { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
186 { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
187 { CODEC_ID_PCM_S8, MKTAG('s', 'o', 'w', 't') },
188 { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
189 { CODEC_ID_PCM_U8, MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
190 { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
191 { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
193 { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
195 { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
196 { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
198 { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
199 { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */
201 { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
202 { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */
204 /* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
206 { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
207 { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
208 { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */
210 { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
211 { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
213 { CODEC_ID_GSM, MKTAG('a', 'g', 's', 'm') },
214 { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
216 { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
217 { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
218 { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */
220 { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
222 { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
223 { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },
225 { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },
227 { CODEC_ID_NONE, 0 },
230 const AVCodecTag ff_codec_movsubtitle_tags[] = {
231 { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
232 { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
233 { CODEC_ID_NONE, 0 },
236 /* map numeric codes from mdhd atom to ISO 639 */
237 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
238 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
239 /* deprecated by putting the code as 3*5bit ascii */
240 static const char * const mov_mdhd_language_map[] = {
241 /* 0-9 */
242 "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
243 "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
244 "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav", NULL,
245 "fo ", NULL, "rus", "chi", NULL, "iri", "alb", "ron", "ces", "slk",
246 "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
247 /*?*/
248 "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon", NULL, "pus",
249 "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
250 "pa ", "ori", "mal", "kan", "tam", "tel", NULL, "bur", "khm", "lao",
251 /* roman? arabic? */
252 "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
253 /*==rundi?*/
254 NULL, "run", NULL, "mlg", "epo", NULL, NULL, NULL, NULL, NULL,
255 /* 100 */
256 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
257 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
258 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "wel", "baq",
259 "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
262 int ff_mov_iso639_to_lang(const char *lang, int mp4)
264 int i, code = 0;
266 /* old way, only for QT? */
267 for (i = 0; !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
268 if (mov_mdhd_language_map[i] && !strcmp(lang, mov_mdhd_language_map[i]))
269 return i;
271 /* XXX:can we do that in mov too? */
272 if (!mp4)
273 return -1;
274 /* handle undefined as such */
275 if (lang[0] == '\0')
276 lang = "und";
277 /* 5bit ascii */
278 for (i = 0; i < 3; i++) {
279 unsigned char c = (unsigned char)lang[i];
280 if (c < 0x60)
281 return -1;
282 if (c > 0x60 + 0x1f)
283 return -1;
284 code <<= 5;
285 code |= (c - 0x60);
287 return code;
290 int ff_mov_lang_to_iso639(unsigned code, char *to)
292 int i;
293 /* is it the mangled iso code? */
294 /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
295 if (code > 138) {
296 for (i = 2; i >= 0; i--) {
297 to[i] = 0x60 + (code & 0x1f);
298 code >>= 5;
300 return 1;
302 /* old fashion apple lang code */
303 if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
304 return 0;
305 if (!mov_mdhd_language_map[code])
306 return 0;
307 strncpy(to, mov_mdhd_language_map[code], 4);
308 return 1;