FFmpeg  4.4.4
isom.c
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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 "internal.h"
26 #include "isom.h"
27 #include "libavcodec/mpeg4audio.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/intreadwrite.h"
31 
32 /* http://www.mp4ra.org */
33 /* ordered by muxing preference */
35  { AV_CODEC_ID_MOV_TEXT , 0x08 },
36  { AV_CODEC_ID_MPEG4 , 0x20 },
37  { AV_CODEC_ID_H264 , 0x21 },
38  { AV_CODEC_ID_HEVC , 0x23 },
39  { AV_CODEC_ID_AAC , 0x40 },
40  { AV_CODEC_ID_MP4ALS , 0x40 }, /* 14496-3 ALS */
41  { AV_CODEC_ID_MPEG2VIDEO , 0x61 }, /* MPEG-2 Main */
42  { AV_CODEC_ID_MPEG2VIDEO , 0x60 }, /* MPEG-2 Simple */
43  { AV_CODEC_ID_MPEG2VIDEO , 0x62 }, /* MPEG-2 SNR */
44  { AV_CODEC_ID_MPEG2VIDEO , 0x63 }, /* MPEG-2 Spatial */
45  { AV_CODEC_ID_MPEG2VIDEO , 0x64 }, /* MPEG-2 High */
46  { AV_CODEC_ID_MPEG2VIDEO , 0x65 }, /* MPEG-2 422 */
47  { AV_CODEC_ID_AAC , 0x66 }, /* MPEG-2 AAC Main */
48  { AV_CODEC_ID_AAC , 0x67 }, /* MPEG-2 AAC Low */
49  { AV_CODEC_ID_AAC , 0x68 }, /* MPEG-2 AAC SSR */
50  { AV_CODEC_ID_MP3 , 0x69 }, /* 13818-3 */
51  { AV_CODEC_ID_MP2 , 0x69 }, /* 11172-3 */
52  { AV_CODEC_ID_MPEG1VIDEO , 0x6A }, /* 11172-2 */
53  { AV_CODEC_ID_MP3 , 0x6B }, /* 11172-3 */
54  { AV_CODEC_ID_MJPEG , 0x6C }, /* 10918-1 */
55  { AV_CODEC_ID_PNG , 0x6D },
56  { AV_CODEC_ID_JPEG2000 , 0x6E }, /* 15444-1 */
57  { AV_CODEC_ID_VC1 , 0xA3 },
58  { AV_CODEC_ID_DIRAC , 0xA4 },
59  { AV_CODEC_ID_AC3 , 0xA5 },
60  { AV_CODEC_ID_EAC3 , 0xA6 },
61  { AV_CODEC_ID_DTS , 0xA9 }, /* mp4ra.org */
62  { AV_CODEC_ID_OPUS , 0xAD }, /* mp4ra.org */
63  { AV_CODEC_ID_VP9 , 0xB1 }, /* mp4ra.org */
64  { AV_CODEC_ID_FLAC , 0xC1 }, /* nonstandard, update when there is a standard value */
65  { AV_CODEC_ID_TSCC2 , 0xD0 }, /* nonstandard, camtasia uses it */
66  { AV_CODEC_ID_EVRC , 0xD1 }, /* nonstandard, pvAuthor uses it */
67  { AV_CODEC_ID_VORBIS , 0xDD }, /* nonstandard, gpac uses it */
68  { AV_CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* nonstandard, see unsupported-embedded-subs-2.mp4 */
69  { AV_CODEC_ID_QCELP , 0xE1 },
70  { AV_CODEC_ID_MPEG4SYSTEMS, 0x01 },
71  { AV_CODEC_ID_MPEG4SYSTEMS, 0x02 },
72  { AV_CODEC_ID_NONE , 0 },
73 };
74 
76  { AV_CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },
77  { AV_CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },
78  { AV_CODEC_ID_EIA_608, MKTAG('c', '6', '0', '8') },
79  { AV_CODEC_ID_NONE, 0 },
80 };
81 
83  { AV_CODEC_ID_BIN_DATA, MKTAG('g', 'p', 'm', 'd') },
84  { AV_CODEC_ID_NONE, 0 },
85 };
86 
87 /* map numeric codes from mdhd atom to ISO 639 */
88 /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
89 /* http://developer.apple.com/documentation/mac/Text/Text-368.html */
90 /* deprecated by putting the code as 3*5 bits ASCII */
91 static const char mov_mdhd_language_map[][4] = {
92  "eng", /* 0 English */
93  "fra", /* 1 French */
94  "ger", /* 2 German */
95  "ita", /* 3 Italian */
96  "dut", /* 4 Dutch */
97  "sve", /* 5 Swedish */
98  "spa", /* 6 Spanish */
99  "dan", /* 7 Danish */
100  "por", /* 8 Portuguese */
101  "nor", /* 9 Norwegian */
102  "heb", /* 10 Hebrew */
103  "jpn", /* 11 Japanese */
104  "ara", /* 12 Arabic */
105  "fin", /* 13 Finnish */
106  "gre", /* 14 Greek */
107  "ice", /* 15 Icelandic */
108  "mlt", /* 16 Maltese */
109  "tur", /* 17 Turkish */
110  "hr ", /* 18 Croatian */
111  "chi", /* 19 Traditional Chinese */
112  "urd", /* 20 Urdu */
113  "hin", /* 21 Hindi */
114  "tha", /* 22 Thai */
115  "kor", /* 23 Korean */
116  "lit", /* 24 Lithuanian */
117  "pol", /* 25 Polish */
118  "hun", /* 26 Hungarian */
119  "est", /* 27 Estonian */
120  "lav", /* 28 Latvian */
121  "", /* 29 Sami */
122  "fo ", /* 30 Faroese */
123  "", /* 31 Farsi */
124  "rus", /* 32 Russian */
125  "chi", /* 33 Simplified Chinese */
126  "", /* 34 Flemish */
127  "iri", /* 35 Irish */
128  "alb", /* 36 Albanian */
129  "ron", /* 37 Romanian */
130  "ces", /* 38 Czech */
131  "slk", /* 39 Slovak */
132  "slv", /* 40 Slovenian */
133  "yid", /* 41 Yiddish */
134  "sr ", /* 42 Serbian */
135  "mac", /* 43 Macedonian */
136  "bul", /* 44 Bulgarian */
137  "ukr", /* 45 Ukrainian */
138  "bel", /* 46 Belarusian */
139  "uzb", /* 47 Uzbek */
140  "kaz", /* 48 Kazakh */
141  "aze", /* 49 Azerbaijani */
142  "aze", /* 50 AzerbaijanAr */
143  "arm", /* 51 Armenian */
144  "geo", /* 52 Georgian */
145  "mol", /* 53 Moldavian */
146  "kir", /* 54 Kirghiz */
147  "tgk", /* 55 Tajiki */
148  "tuk", /* 56 Turkmen */
149  "mon", /* 57 Mongolian */
150  "", /* 58 MongolianCyr */
151  "pus", /* 59 Pashto */
152  "kur", /* 60 Kurdish */
153  "kas", /* 61 Kashmiri */
154  "snd", /* 62 Sindhi */
155  "tib", /* 63 Tibetan */
156  "nep", /* 64 Nepali */
157  "san", /* 65 Sanskrit */
158  "mar", /* 66 Marathi */
159  "ben", /* 67 Bengali */
160  "asm", /* 68 Assamese */
161  "guj", /* 69 Gujarati */
162  "pa ", /* 70 Punjabi */
163  "ori", /* 71 Oriya */
164  "mal", /* 72 Malayalam */
165  "kan", /* 73 Kannada */
166  "tam", /* 74 Tamil */
167  "tel", /* 75 Telugu */
168  "", /* 76 Sinhala */
169  "bur", /* 77 Burmese */
170  "khm", /* 78 Khmer */
171  "lao", /* 79 Lao */
172  "vie", /* 80 Vietnamese */
173  "ind", /* 81 Indonesian */
174  "tgl", /* 82 Tagalog */
175  "may", /* 83 MalayRoman */
176  "may", /* 84 MalayArabic */
177  "amh", /* 85 Amharic */
178  "tir", /* 86 Galla */
179  "orm", /* 87 Oromo */
180  "som", /* 88 Somali */
181  "swa", /* 89 Swahili */
182  "", /* 90 Kinyarwanda */
183  "run", /* 91 Rundi */
184  "", /* 92 Nyanja */
185  "mlg", /* 93 Malagasy */
186  "epo", /* 94 Esperanto */
187  "", /* 95 */
188  "", /* 96 */
189  "", /* 97 */
190  "", /* 98 */
191  "", /* 99 */
192  "", /* 100 */
193  "", /* 101 */
194  "", /* 102 */
195  "", /* 103 */
196  "", /* 104 */
197  "", /* 105 */
198  "", /* 106 */
199  "", /* 107 */
200  "", /* 108 */
201  "", /* 109 */
202  "", /* 110 */
203  "", /* 111 */
204  "", /* 112 */
205  "", /* 113 */
206  "", /* 114 */
207  "", /* 115 */
208  "", /* 116 */
209  "", /* 117 */
210  "", /* 118 */
211  "", /* 119 */
212  "", /* 120 */
213  "", /* 121 */
214  "", /* 122 */
215  "", /* 123 */
216  "", /* 124 */
217  "", /* 125 */
218  "", /* 126 */
219  "", /* 127 */
220  "wel", /* 128 Welsh */
221  "baq", /* 129 Basque */
222  "cat", /* 130 Catalan */
223  "lat", /* 131 Latin */
224  "que", /* 132 Quechua */
225  "grn", /* 133 Guarani */
226  "aym", /* 134 Aymara */
227  "tat", /* 135 Tatar */
228  "uig", /* 136 Uighur */
229  "dzo", /* 137 Dzongkha */
230  "jav", /* 138 JavaneseRom */
231 };
232 
233 int ff_mov_iso639_to_lang(const char lang[4], int mp4)
234 {
235  int i, code = 0;
236 
237  /* old way, only for QT? */
238  for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {
239  if (!strcmp(lang, mov_mdhd_language_map[i]))
240  return i;
241  }
242  /* XXX:can we do that in mov too? */
243  if (!mp4)
244  return -1;
245  /* handle undefined as such */
246  if (lang[0] == '\0')
247  lang = "und";
248  /* 5 bits ASCII */
249  for (i = 0; i < 3; i++) {
250  uint8_t c = lang[i];
251  c -= 0x60;
252  if (c > 0x1f)
253  return -1;
254  code <<= 5;
255  code |= c;
256  }
257  return code;
258 }
259 
260 int ff_mov_lang_to_iso639(unsigned code, char to[4])
261 {
262  int i;
263  memset(to, 0, 4);
264  /* is it the mangled iso code? */
265  /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
266  if (code >= 0x400 && code != 0x7fff) {
267  for (i = 2; i >= 0; i--) {
268  to[i] = 0x60 + (code & 0x1f);
269  code >>= 5;
270  }
271  return 1;
272  }
273  /* old fashion apple lang code */
275  return 0;
276  if (!mov_mdhd_language_map[code][0])
277  return 0;
278  memcpy(to, mov_mdhd_language_map[code], 4);
279  return 1;
280 }
281 
283 {
284  int len = 0;
285  int count = 4;
286  while (count--) {
287  int c = avio_r8(pb);
288  len = (len << 7) | (c & 0x7f);
289  if (!(c & 0x80))
290  break;
291  }
292  return len;
293 }
294 
296 {
297  int len;
298  *tag = avio_r8(pb);
300  av_log(fc, AV_LOG_TRACE, "MPEG-4 description: tag=0x%02x len=%d\n", *tag, len);
301  return len;
302 }
303 
304 void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
305 {
306  int flags;
307  if (es_id) *es_id = avio_rb16(pb);
308  else avio_rb16(pb);
309  flags = avio_r8(pb);
310  if (flags & 0x80) //streamDependenceFlag
311  avio_rb16(pb);
312  if (flags & 0x40) { //URL_Flag
313  int len = avio_r8(pb);
314  avio_skip(pb, len);
315  }
316  if (flags & 0x20) //OCRstreamFlag
317  avio_rb16(pb);
318 }
319 
320 static const AVCodecTag mp4_audio_types[] = {
321  { AV_CODEC_ID_MP3ON4, AOT_PS }, /* old mp3on4 draft */
322  { AV_CODEC_ID_MP3ON4, AOT_L1 }, /* layer 1 */
323  { AV_CODEC_ID_MP3ON4, AOT_L2 }, /* layer 2 */
324  { AV_CODEC_ID_MP3ON4, AOT_L3 }, /* layer 3 */
325  { AV_CODEC_ID_MP4ALS, AOT_ALS }, /* MPEG-4 ALS */
327 };
328 
330 {
331  enum AVCodecID codec_id;
332  unsigned v;
333  int len, tag;
334  int ret;
335  int object_type_id = avio_r8(pb);
336  avio_r8(pb); /* stream type */
337  avio_rb24(pb); /* buffer size db */
338 
339  v = avio_rb32(pb);
340 
341  // TODO: fix this with codecpar
342 #if FF_API_LAVF_AVCTX
344  if (v < INT32_MAX)
345  st->codec->rc_max_rate = v;
347 #endif
348 
349  st->codecpar->bit_rate = avio_rb32(pb); /* avg bitrate */
350 
351  codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
352  if (codec_id)
353  st->codecpar->codec_id = codec_id;
354  av_log(fc, AV_LOG_TRACE, "esds object type id 0x%02x\n", object_type_id);
355  len = ff_mp4_read_descr(fc, pb, &tag);
356  if (tag == MP4DecSpecificDescrTag) {
357  av_log(fc, AV_LOG_TRACE, "Specific MPEG-4 header len=%d\n", len);
358  /* As per 14496-3:2009 9.D.2.2, No decSpecificInfo is defined
359  for MPEG-1 Audio or MPEG-2 Audio; MPEG-2 AAC excluded. */
360  if (object_type_id == 0x69 || object_type_id == 0x6b)
361  return 0;
362  if (!len || (uint64_t)len > (1<<30))
363  return AVERROR_INVALIDDATA;
364  if ((ret = ff_get_extradata(fc, st->codecpar, pb, len)) < 0)
365  return ret;
366  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
367  MPEG4AudioConfig cfg = {0};
369  st->codecpar->extradata_size, 1, fc);
370  if (ret < 0)
371  return ret;
372  st->codecpar->channels = cfg.channels;
373  if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
375  else if (cfg.ext_sample_rate)
377  else
378  st->codecpar->sample_rate = cfg.sample_rate;
379  av_log(fc, AV_LOG_TRACE, "mp4a config channels %d obj %d ext obj %d "
380  "sample rate %d ext sample rate %d\n", st->codecpar->channels,
381  cfg.object_type, cfg.ext_object_type,
382  cfg.sample_rate, cfg.ext_sample_rate);
384  cfg.object_type)))
386  }
387  }
388  return 0;
389 }
390 
391 typedef struct MovChannelLayout {
392  int64_t channel_layout;
393  uint32_t layout_tag;
395 
397  { AV_CH_LAYOUT_MONO, (100<<16) | 1}, // kCAFChannelLayoutTag_Mono
398  { AV_CH_LAYOUT_STEREO, (101<<16) | 2}, // kCAFChannelLayoutTag_Stereo
399  { AV_CH_LAYOUT_STEREO, (102<<16) | 2}, // kCAFChannelLayoutTag_StereoHeadphones
400  { AV_CH_LAYOUT_2_1, (131<<16) | 3}, // kCAFChannelLayoutTag_ITU_2_1
401  { AV_CH_LAYOUT_QUAD, (132<<16) | 4}, // kCAFChannelLayoutTag_ITU_2_2
402  { AV_CH_LAYOUT_2_2, (132<<16) | 4}, // kCAFChannelLayoutTag_ITU_2_2
403  { AV_CH_LAYOUT_QUAD, (108<<16) | 4}, // kCAFChannelLayoutTag_Quadraphonic
404  { AV_CH_LAYOUT_SURROUND, (113<<16) | 3}, // kCAFChannelLayoutTag_MPEG_3_0_A
405  { AV_CH_LAYOUT_4POINT0, (115<<16) | 4}, // kCAFChannelLayoutTag_MPEG_4_0_A
406  { AV_CH_LAYOUT_5POINT0_BACK, (117<<16) | 5}, // kCAFChannelLayoutTag_MPEG_5_0_A
407  { AV_CH_LAYOUT_5POINT0, (117<<16) | 5}, // kCAFChannelLayoutTag_MPEG_5_0_A
408  { AV_CH_LAYOUT_5POINT1_BACK, (121<<16) | 6}, // kCAFChannelLayoutTag_MPEG_5_1_A
409  { AV_CH_LAYOUT_5POINT1, (121<<16) | 6}, // kCAFChannelLayoutTag_MPEG_5_1_A
410  { AV_CH_LAYOUT_7POINT1, (128<<16) | 8}, // kCAFChannelLayoutTag_MPEG_7_1_C
411  { AV_CH_LAYOUT_7POINT1_WIDE, (126<<16) | 8}, // kCAFChannelLayoutTag_MPEG_7_1_A
412  { AV_CH_LAYOUT_5POINT1_BACK|AV_CH_LAYOUT_STEREO_DOWNMIX, (130<<16) | 8}, // kCAFChannelLayoutTag_SMPTE_DTV
413  { AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY, (133<<16) | 3}, // kCAFChannelLayoutTag_DVD_4
414  { AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY, (134<<16) | 4}, // kCAFChannelLayoutTag_DVD_5
415  { AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY, (135<<16) | 4}, // kCAFChannelLayoutTag_DVD_6
416  { AV_CH_LAYOUT_2_2|AV_CH_LOW_FREQUENCY, (135<<16) | 4}, // kCAFChannelLayoutTag_DVD_6
417  { AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, (136<<16) | 4}, // kCAFChannelLayoutTag_DVD_10
418  { AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY, (137<<16) | 5}, // kCAFChannelLayoutTag_DVD_11
419  { 0, 0},
420 };
421 
422 void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
423 {
424  const MovChannelLayout *layouts;
425  uint32_t layout_tag = 0;
426 
427  for (layouts = mov_channel_layout; layouts->channel_layout; layouts++)
428  if (channel_layout == layouts->channel_layout) {
429  layout_tag = layouts->layout_tag;
430  break;
431  }
432 
433  if (layout_tag) {
434  avio_wb32(pb, layout_tag); // mChannelLayoutTag
435  avio_wb32(pb, 0); // mChannelBitmap
436  } else {
437  avio_wb32(pb, 0x10000); // kCAFChannelLayoutTag_UseChannelBitmap
438  avio_wb32(pb, channel_layout);
439  }
440  avio_wb32(pb, 0); // mNumberChannelDescriptions
441 }
uint8_t
Main libavformat public API header.
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:383
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:766
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:774
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define fc(width, name, range_min, range_max)
Definition: cbs_av1.c:551
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define AV_CH_LAYOUT_QUAD
#define AV_CH_LAYOUT_4POINT0
#define AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_STEREO_DOWNMIX
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_2_2
#define AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_7POINT1_WIDE
#define AV_CH_LAYOUT_5POINT0_BACK
#define AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_2_1
#define AV_CH_LAYOUT_5POINT1_BACK
#define AV_CH_LOW_FREQUENCY
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
@ AV_CODEC_ID_DIRAC
Definition: codec_id.h:165
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:429
@ AV_CODEC_ID_PNG
Definition: codec_id.h:110
@ AV_CODEC_ID_EAC3
Definition: codec_id.h:464
@ AV_CODEC_ID_DVD_SUBTITLE
Definition: codec_id.h:523
@ AV_CODEC_ID_MP4ALS
Definition: codec_id.h:469
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_EVRC
Definition: codec_id.h:496
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:137
@ AV_CODEC_ID_VC1
Definition: codec_id.h:119
@ AV_CODEC_ID_EIA_608
Definition: codec_id.h:534
@ AV_CODEC_ID_MP2
Definition: codec_id.h:424
@ AV_CODEC_ID_DTS
Definition: codec_id.h:428
@ AV_CODEC_ID_HEVC
Definition: codec_id.h:223
@ AV_CODEC_ID_BIN_DATA
Definition: codec_id.h:564
@ AV_CODEC_ID_AAC
Definition: codec_id.h:426
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:436
@ AV_CODEC_ID_QCELP
Definition: codec_id.h:448
@ AV_CODEC_ID_AC3
Definition: codec_id.h:427
@ AV_CODEC_ID_MP3ON4
Definition: codec_id.h:438
@ AV_CODEC_ID_TSCC2
Definition: codec_id.h:213
@ AV_CODEC_ID_MPEG4
Definition: codec_id.h:61
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_MPEG4SYSTEMS
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: codec_id.h:571
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:425
@ AV_CODEC_ID_VP9
Definition: codec_id.h:217
@ AV_CODEC_ID_MPEG1VIDEO
Definition: codec_id.h:50
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:484
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
@ AV_CODEC_ID_MOV_TEXT
Definition: codec_id.h:528
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
int i
Definition: input.c:407
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
Definition: isom.c:304
int ff_mp4_read_descr_len(AVIOContext *pb)
Definition: isom.c:282
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
int ff_mov_iso639_to_lang(const char lang[4], int mp4)
Definition: isom.c:233
static const char mov_mdhd_language_map[][4]
Definition: isom.c:91
int ff_mov_lang_to_iso639(unsigned code, char to[4])
Definition: isom.c:260
static const AVCodecTag mp4_audio_types[]
Definition: isom.c:320
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)
Definition: isom.c:329
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
Definition: isom.c:422
const AVCodecTag ff_codec_movdata_tags[]
Definition: isom.c:82
static const MovChannelLayout mov_channel_layout[]
Definition: isom.c:396
const AVCodecTag ff_codec_movsubtitle_tags[]
Definition: isom.c:75
int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)
Definition: isom.c:295
#define MP4DecSpecificDescrTag
Definition: isom.h:311
const char * to
Definition: webvttdec.c:34
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3332
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
common internal API header
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
uint32_t tag
Definition: movenc.c:1611
int avpriv_mpeg4audio_get_config2(MPEG4AudioConfig *c, const uint8_t *buf, int size, int sync_extension, void *logctx)
Parse MPEG-4 systems extradata from a raw buffer to retrieve audio configuration.
Definition: mpeg4audio.c:190
@ AOT_ALS
Y Audio LosslesS.
Definition: mpeg4audio.h:122
@ AOT_L3
Y Layer 3.
Definition: mpeg4audio.h:120
@ AOT_L2
Y Layer 2.
Definition: mpeg4audio.h:119
@ AOT_L1
Y Layer 1.
Definition: mpeg4audio.h:118
@ AOT_NULL
Definition: mpeg4audio.h:88
@ AOT_PS
N Parametric Stereo.
Definition: mpeg4audio.h:115
const uint16_t avpriv_mpa_freq_tab[3]
Definition: mpegaudiodata.c:40
mpeg audio layer common tables.
#define FF_ARRAY_ELEMS(a)
const uint8_t * code
Definition: spdifenc.c:413
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:1416
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int channels
Audio only.
Definition: codec_par.h:166
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
attribute_deprecated AVCodecContext * codec
Definition: avformat.h:886
uint32_t layout_tag
Definition: isom.c:393
int64_t channel_layout
Definition: isom.c:392
#define av_log(a,...)
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
int len
static double c[64]