summaryrefslogtreecommitdiff
path: root/libavformat/isom.c
blob: 9064576834ce71a05a1c624becd1711ba489cb74 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/*
 * ISO Media common code
 * Copyright (c) 2001 Fabrice Bellard
 * Copyright (c) 2002 Francois Revol <revol@free.fr>
 * Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "avformat.h"
#include "internal.h"
#include "isom.h"

/* http://www.mp4ra.org */
/* ordered by muxing preference */
const AVCodecTag ff_mp4_obj_type[] = {
    { CODEC_ID_MOV_TEXT  , 0x08 },
    { CODEC_ID_MPEG4     , 0x20 },
    { CODEC_ID_H264      , 0x21 },
    { CODEC_ID_AAC       , 0x40 },
    { CODEC_ID_MP4ALS    , 0x40 }, /* 14496-3 ALS */
    { CODEC_ID_MPEG2VIDEO, 0x61 }, /* MPEG2 Main */
    { CODEC_ID_MPEG2VIDEO, 0x60 }, /* MPEG2 Simple */
    { CODEC_ID_MPEG2VIDEO, 0x62 }, /* MPEG2 SNR */
    { CODEC_ID_MPEG2VIDEO, 0x63 }, /* MPEG2 Spatial */
    { CODEC_ID_MPEG2VIDEO, 0x64 }, /* MPEG2 High */
    { CODEC_ID_MPEG2VIDEO, 0x65 }, /* MPEG2 422 */
    { CODEC_ID_AAC       , 0x66 }, /* MPEG2 AAC Main */
    { CODEC_ID_AAC       , 0x67 }, /* MPEG2 AAC Low */
    { CODEC_ID_AAC       , 0x68 }, /* MPEG2 AAC SSR */
    { CODEC_ID_MP3       , 0x69 }, /* 13818-3 */
    { CODEC_ID_MP2       , 0x69 }, /* 11172-3 */
    { CODEC_ID_MPEG1VIDEO, 0x6A }, /* 11172-2 */
    { CODEC_ID_MP3       , 0x6B }, /* 11172-3 */
    { CODEC_ID_MJPEG     , 0x6C }, /* 10918-1 */
    { CODEC_ID_PNG       , 0x6D },
    { CODEC_ID_JPEG2000  , 0x6E }, /* 15444-1 */
    { CODEC_ID_VC1       , 0xA3 },
    { CODEC_ID_DIRAC     , 0xA4 },
    { CODEC_ID_AC3       , 0xA5 },
    { CODEC_ID_VORBIS    , 0xDD }, /* non standard, gpac uses it */
    { CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
    { CODEC_ID_QCELP     , 0xE1 },
    { CODEC_ID_NONE      ,    0 },
};

const AVCodecTag codec_movvideo_tags[] = {
/*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */

    { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
    { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
    { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
    { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
    { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */

    { CODEC_ID_RAWVIDEO, MKTAG('L', '5', '5', '5') },
    { CODEC_ID_RAWVIDEO, MKTAG('L', '5', '6', '5') },
    { CODEC_ID_RAWVIDEO, MKTAG('B', '5', '6', '5') },
    { CODEC_ID_RAWVIDEO, MKTAG('2', '4', 'B', 'G') },
    { CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },
    { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },
    { CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },
    { CODEC_ID_RAWVIDEO, MKTAG('b', '1', '6', 'g') },
    { CODEC_ID_RAWVIDEO, MKTAG('b', '4', '8', 'r') },

    { CODEC_ID_R10K,   MKTAG('R', '1', '0', 'k') }, /* UNCOMPRESSED 10BIT RGB */
    { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
    { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */

    { CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
    { CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
    { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
/*  { CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */
    { CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */
    { CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */

    { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
    { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */

    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
    { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */

    { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
    { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */

    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */
    { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */
    { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */
    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */

    { CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
    { CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
    { CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
    { CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
    { CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
    { CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },
    { CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */

    { CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },

    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */

    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
    { CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') },
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */
    { CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */
    { CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') },

    { CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */

    { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */
    { CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */
    { CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */
    { CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },

    { CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */
    { CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },

    { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
    { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
    { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
    { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
    { CODEC_ID_SGI,   MKTAG('s', 'g', 'i', ' ') }, /* SGI  */
    { CODEC_ID_DPX,   MKTAG('d', 'p', 'x', ' ') }, /* DPX */

    { CODEC_ID_NONE, 0 },
};

const AVCodecTag codec_movaudio_tags[] = {
    { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },
    { CODEC_ID_PCM_S32LE, MKTAG('i', 'n', '3', '2') },
    { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },
    { CODEC_ID_PCM_S24LE, MKTAG('i', 'n', '2', '4') },
    { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
    { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */
    { CODEC_ID_PCM_S16LE, MKTAG('l', 'p', 'c', 'm') },
    { CODEC_ID_PCM_F32BE, MKTAG('f', 'l', '3', '2') },
    { CODEC_ID_PCM_F32LE, MKTAG('f', 'l', '3', '2') },
    { CODEC_ID_PCM_F64BE, MKTAG('f', 'l', '6', '4') },
    { CODEC_ID_PCM_F64LE, MKTAG('f', 'l', '6', '4') },
    { CODEC_ID_PCM_S8,    MKTAG('s', 'o', 'w', 't') },
    { CODEC_ID_PCM_U8,    MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
    { CODEC_ID_PCM_U8,    MKTAG('N', 'O', 'N', 'E') }, /* uncompressed */
    { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */
    { CODEC_ID_PCM_ALAW,  MKTAG('a', 'l', 'a', 'w') }, /*  */

    { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */

    { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
    { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */

    { CODEC_ID_MP1, MKTAG('.', 'm', 'p', '1') }, /* MPEG layer 1 */
    { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '2') }, /* MPEG layer 2 */

    { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
    { CODEC_ID_MP3, 0x6D730055 }, /* MPEG layer 3 */

/*  { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

    { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
    { CODEC_ID_AC3, MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */
    { CODEC_ID_AC3, MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */

    { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
    { CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */

    { CODEC_ID_GSM,  MKTAG('a', 'g', 's', 'm') },
    { CODEC_ID_ALAC, MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */

    { CODEC_ID_QCELP, MKTAG('Q','c','l','p') },
    { CODEC_ID_QCELP, MKTAG('Q','c','l','q') },
    { CODEC_ID_QCELP, MKTAG('s','q','c','p') }, /* ISO Media fourcc */

    { CODEC_ID_QDM2, MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */

    { CODEC_ID_DVAUDIO, MKTAG('v', 'd', 'v', 'a') },
    { CODEC_ID_DVAUDIO, MKTAG('d', 'v', 'c', 'a') },

    { CODEC_ID_WMAV2, MKTAG('W', 'M', 'A', '2') },

    { CODEC_ID_NONE, 0 },
};

const AVCodecTag ff_codec_movsubtitle_tags[] = {
    { CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
    { CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
    { CODEC_ID_NONE, 0 },
};

/* map numeric codes from mdhd atom to ISO 639 */
/* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
/* http://developer.apple.com/documentation/mac/Text/Text-368.html */
/* deprecated by putting the code as 3*5bit ascii */
static const char mov_mdhd_language_map[][4] = {
    /* 0-9 */
    "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
    "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,
    "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",
    "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",
    "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",
    /*?*/
    "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",
    "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",
    "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",
    /*                   roman? arabic? */
    "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",
    /*==rundi?*/
       "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",
    /* 100 */
       "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
       "",    "",    "",    "",    "",    "",    "",    "",    "",    "",
       "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",
    "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"
};

int ff_mov_iso639_to_lang(const char lang[4], int mp4)
{
    int i, code = 0;

    /* old way, only for QT? */
    for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
        if (!strcmp(lang, mov_mdhd_language_map[i]))
            return i;
    }
    /* XXX:can we do that in mov too? */
    if (!mp4)
        return -1;
    /* handle undefined as such */
    if (lang[0] == '\0')
        lang = "und";
    /* 5bit ascii */
    for (i = 0; i < 3; i++) {
        uint8_t c = lang[i];
        c -= 0x60;
        if (c > 0x1f)
            return -1;
        code <<= 5;
        code |= c;
    }
    return code;
}

int ff_mov_lang_to_iso639(unsigned code, char to[4])
{
    int i;
    memset(to, 0, 4);
    /* is it the mangled iso code? */
    /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
    if (code > 138) {
        for (i = 2; i >= 0; i--) {
            to[i] = 0x60 + (code & 0x1f);
            code >>= 5;
        }
        return 1;
    }
    /* old fashion apple lang code */
    if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))
        return 0;
    if (!mov_mdhd_language_map[code][0])
        return 0;
    memcpy(to, mov_mdhd_language_map[code], 4);
    return 1;
}