FFmpeg  4.4.5
aiffdec.c
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1 /*
2  * AIFF/AIFF-C demuxer
3  * Copyright (c) 2006 Patrick Guimond
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "avformat.h"
25 #include "internal.h"
26 #include "pcm.h"
27 #include "aiff.h"
28 #include "id3v2.h"
29 #include "mov_chan.h"
30 #include "replaygain.h"
31 
32 #define AIFF 0
33 #define AIFF_C_VERSION1 0xA2805140
34 
35 typedef struct AIFFInputContext {
39 
40 static enum AVCodecID aiff_codec_get_id(int bps)
41 {
42  if (bps <= 8)
43  return AV_CODEC_ID_PCM_S8;
44  if (bps <= 16)
45  return AV_CODEC_ID_PCM_S16BE;
46  if (bps <= 24)
47  return AV_CODEC_ID_PCM_S24BE;
48  if (bps <= 32)
49  return AV_CODEC_ID_PCM_S32BE;
50 
51  /* bigger than 32 isn't allowed */
52  return AV_CODEC_ID_NONE;
53 }
54 
55 /* returns the size of the found tag */
56 static int64_t get_tag(AVIOContext *pb, uint32_t * tag)
57 {
58  int64_t size;
59 
60  if (avio_feof(pb))
61  return AVERROR(EIO);
62 
63  *tag = avio_rl32(pb);
64  size = avio_rb32(pb);
65 
66  return size;
67 }
68 
69 /* Metadata string read */
70 static void get_meta(AVFormatContext *s, const char *key, int64_t size)
71 {
72  uint8_t *str = NULL;
73 
74  if (size < SIZE_MAX)
75  str = av_malloc(size+1);
76 
77  if (str) {
78  int res = avio_read(s->pb, str, size);
79  if (res < 0){
80  av_free(str);
81  return;
82  }
83  size -= res;
84  str[res] = 0;
86  }
87 
88  avio_skip(s->pb, size);
89 }
90 
91 /* Returns the number of sound data frames or negative on error */
93  unsigned version)
94 {
95  AVIOContext *pb = s->pb;
96  AVCodecParameters *par = s->streams[0]->codecpar;
97  AIFFInputContext *aiff = s->priv_data;
98  int exp;
99  uint64_t val;
100  int sample_rate;
101  unsigned int num_frames;
102 
103  if (size & 1)
104  size++;
106  par->channels = avio_rb16(pb);
107  num_frames = avio_rb32(pb);
108  par->bits_per_coded_sample = avio_rb16(pb);
109 
110  exp = avio_rb16(pb) - 16383 - 63;
111  val = avio_rb64(pb);
112  if (exp <-63 || exp >63) {
113  av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp);
114  return AVERROR_INVALIDDATA;
115  }
116  if (exp >= 0)
117  sample_rate = val << exp;
118  else
119  sample_rate = (val + (1ULL<<(-exp-1))) >> -exp;
120  if (sample_rate <= 0)
121  return AVERROR_INVALIDDATA;
122 
123  par->sample_rate = sample_rate;
124  if (size < 18)
125  return AVERROR_INVALIDDATA;
126  size -= 18;
127 
128  /* get codec id for AIFF-C */
129  if (size < 4) {
130  version = AIFF;
131  } else if (version == AIFF_C_VERSION1) {
132  par->codec_tag = avio_rl32(pb);
134  if (par->codec_id == AV_CODEC_ID_NONE)
135  avpriv_request_sample(s, "unknown or unsupported codec tag: %s",
136  av_fourcc2str(par->codec_tag));
137  size -= 4;
138  }
139 
143  aiff->block_duration = 1;
144  } else {
145  switch (par->codec_id) {
151  aiff->block_duration = 1;
152  break;
154  par->block_align = 34 * par->channels;
155  break;
156  case AV_CODEC_ID_MACE3:
157  par->block_align = 2 * par->channels;
158  break;
160  par->bits_per_coded_sample = 5;
163  case AV_CODEC_ID_MACE6:
165  par->block_align = 1 * par->channels;
166  break;
167  case AV_CODEC_ID_GSM:
168  par->block_align = 33;
169  break;
170  default:
171  aiff->block_duration = 1;
172  break;
173  }
174  if (par->block_align > 0)
176  par->block_align);
177  }
178 
179  /* Block align needs to be computed in all cases, as the definition
180  * is specific to applications -> here we use the WAVE format definition */
181  if (!par->block_align)
182  par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3;
183 
184  if (aiff->block_duration) {
185  par->bit_rate = av_rescale(par->sample_rate, par->block_align * 8LL,
186  aiff->block_duration);
187  if (par->bit_rate < 0)
188  par->bit_rate = 0;
189  }
190 
191  /* Chunk is over */
192  if (size)
193  avio_skip(pb, size);
194 
195  return num_frames;
196 }
197 
198 static int aiff_probe(const AVProbeData *p)
199 {
200  /* check file header */
201  if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
202  p->buf[2] == 'R' && p->buf[3] == 'M' &&
203  p->buf[8] == 'A' && p->buf[9] == 'I' &&
204  p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
205  return AVPROBE_SCORE_MAX;
206  else
207  return 0;
208 }
209 
210 /* aiff input */
212 {
213  int ret;
214  int64_t filesize, size;
215  int64_t offset = 0, position;
216  uint32_t tag;
217  unsigned version = AIFF_C_VERSION1;
218  AVIOContext *pb = s->pb;
219  AVStream * st;
220  AIFFInputContext *aiff = s->priv_data;
221  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
222 
223  /* check FORM header */
224  filesize = get_tag(pb, &tag);
225  if (filesize < 4 || tag != MKTAG('F', 'O', 'R', 'M'))
226  return AVERROR_INVALIDDATA;
227 
228  /* AIFF data type */
229  tag = avio_rl32(pb);
230  if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
231  version = AIFF;
232  else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
233  return AVERROR_INVALIDDATA;
234 
235  filesize -= 4;
236 
237  st = avformat_new_stream(s, NULL);
238  if (!st)
239  return AVERROR(ENOMEM);
240 
241  while (filesize > 0) {
242  /* parse different chunks */
243  size = get_tag(pb, &tag);
244 
245  if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) {
246  av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
247  goto got_sound;
248  }
249  if (size < 0)
250  return size;
251 
252  filesize -= size + 8;
253 
254  switch (tag) {
255  case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
256  /* Then for the complete header info */
258  if (st->nb_frames < 0)
259  return st->nb_frames;
260  if (offset > 0) // COMM is after SSND
261  goto got_sound;
262  break;
263  case MKTAG('I', 'D', '3', ' '):
264  position = avio_tell(pb);
265  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
266  if (id3v2_extra_meta)
267  if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 ||
268  (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) {
269  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
270  return ret;
271  }
272  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
273  if (position + size > avio_tell(pb))
274  avio_skip(pb, position + size - avio_tell(pb));
275  break;
276  case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
277  version = avio_rb32(pb);
278  break;
279  case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
280  get_meta(s, "title" , size);
281  break;
282  case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
283  get_meta(s, "author" , size);
284  break;
285  case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
286  get_meta(s, "copyright", size);
287  break;
288  case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
289  get_meta(s, "comment" , size);
290  break;
291  case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
292  if (size < 8)
293  return AVERROR_INVALIDDATA;
294  aiff->data_end = avio_tell(pb) + size;
295  offset = avio_rb32(pb); /* Offset of sound data */
296  avio_rb32(pb); /* BlockSize... don't care */
297  offset += avio_tell(pb); /* Compute absolute data offset */
298  if (st->codecpar->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) /* Assume COMM already parsed */
299  goto got_sound;
300  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
301  av_log(s, AV_LOG_ERROR, "file is not seekable\n");
302  return -1;
303  }
304  avio_skip(pb, size - 8);
305  break;
306  case MKTAG('w', 'a', 'v', 'e'):
307  if ((uint64_t)size > (1<<30))
308  return -1;
309  if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0)
310  return ret;
312  && size>=12*4 && !st->codecpar->block_align) {
313  st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4);
314  aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4);
315  } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
316  char rate = 0;
317  if (size >= 25)
318  rate = st->codecpar->extradata[24];
319  switch (rate) {
320  case 'H': // RATE_HALF
321  st->codecpar->block_align = 17;
322  break;
323  case 'F': // RATE_FULL
324  default:
325  st->codecpar->block_align = 35;
326  }
327  aiff->block_duration = 160;
328  st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * (st->codecpar->block_align << 3) /
329  aiff->block_duration;
330  }
331  break;
332  case MKTAG('C','H','A','N'):
333  if ((ret = ff_mov_read_chan(s, pb, st, size)) < 0)
334  return ret;
335  break;
336  case MKTAG('A','P','C','M'): /* XA ADPCM compressed sound chunk */
338  aiff->data_end = avio_tell(pb) + size;
339  offset = avio_tell(pb) + 8;
340  /* This field is unknown and its data seems to be irrelevant */
341  avio_rb32(pb);
342  st->codecpar->block_align = avio_rb32(pb);
343 
344  goto got_sound;
345  break;
346  case 0:
347  if (offset > 0 && st->codecpar->block_align) // COMM && SSND
348  goto got_sound;
349  default: /* Jump */
350  avio_skip(pb, size);
351  }
352 
353  /* Skip required padding byte for odd-sized chunks. */
354  if (size & 1) {
355  filesize--;
356  avio_skip(pb, 1);
357  }
358  }
359 
360  ret = ff_replaygain_export(st, s->metadata);
361  if (ret < 0)
362  return ret;
363 
364 got_sound:
365  if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
366  av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n");
367  st->codecpar->block_align = 35;
368  } else if (st->codecpar->block_align <= 0) {
369  av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
370  return -1;
371  }
372  if (aiff->block_duration < 0)
373  return AVERROR_INVALIDDATA;
374 
375  /* Now positioned, get the sound data start and end */
376  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
377  st->start_time = 0;
378  st->duration = st->nb_frames * aiff->block_duration;
379 
380  /* Position the stream at the first block */
381  avio_seek(pb, offset, SEEK_SET);
382 
383  return 0;
384 }
385 
386 #define MAX_SIZE 4096
387 
389  AVPacket *pkt)
390 {
391  AVStream *st = s->streams[0];
392  AIFFInputContext *aiff = s->priv_data;
393  int64_t max_size;
394  int res, size;
395 
396  /* calculate size of remaining data */
397  max_size = aiff->data_end - avio_tell(s->pb);
398  if (max_size <= 0)
399  return AVERROR_EOF;
400 
401  if (!st->codecpar->block_align) {
402  av_log(s, AV_LOG_ERROR, "block_align not set\n");
403  return AVERROR_INVALIDDATA;
404  }
405 
406  /* Now for that packet */
407  switch (st->codecpar->codec_id) {
409  case AV_CODEC_ID_GSM:
410  case AV_CODEC_ID_QDM2:
411  case AV_CODEC_ID_QCELP:
412  size = st->codecpar->block_align;
413  break;
414  default:
416  if (!size)
417  return AVERROR_INVALIDDATA;
418  }
419  size = FFMIN(max_size, size);
420  res = av_get_packet(s->pb, pkt, size);
421  if (res < 0)
422  return res;
423 
424  if (size >= st->codecpar->block_align)
426  /* Only one stream in an AIFF file */
427  pkt->stream_index = 0;
428  pkt->duration = (res / st->codecpar->block_align) * (int64_t) aiff->block_duration;
429  return 0;
430 }
431 
433  .name = "aiff",
434  .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
435  .priv_data_size = sizeof(AIFFInputContext),
440  .codec_tag = ff_aiff_codec_tags_list,
441 };
static double val(void *priv, double ch)
Definition: aeval.c:76
const AVCodecTag ff_codec_aiff_tags[]
Definition: aiff.c:26
const AVCodecTag *const ff_aiff_codec_tags_list[]
Definition: aiff.c:54
common header for AIFF muxer and demuxer
#define MAX_SIZE
Definition: aiffdec.c:386
static int aiff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: aiffdec.c:388
static int aiff_read_header(AVFormatContext *s)
Definition: aiffdec.c:211
static int aiff_probe(const AVProbeData *p)
Definition: aiffdec.c:198
AVInputFormat ff_aiff_demuxer
Definition: aiffdec.c:432
static void get_meta(AVFormatContext *s, const char *key, int64_t size)
Definition: aiffdec.c:70
#define AIFF
Definition: aiffdec.c:32
static int get_aiff_header(AVFormatContext *s, int64_t size, unsigned version)
Definition: aiffdec.c:92
#define AIFF_C_VERSION1
Definition: aiffdec.c:33
static int64_t get_tag(AVIOContext *pb, uint32_t *tag)
Definition: aiffdec.c:56
static enum AVCodecID aiff_codec_get_id(int bps)
Definition: aiffdec.c:40
uint8_t
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:902
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:766
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_RB32
Definition: intreadwrite.h:130
#define s(width, name)
Definition: cbs_vp9.c:257
#define FFMIN(a, b)
Definition: common.h:105
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
Public dictionary API.
int8_t exp
Definition: eval.c:72
sample_rate
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:326
@ AV_CODEC_ID_ADPCM_IMA_WS
Definition: codec_id.h:357
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:313
@ AV_CODEC_ID_GSM
as in Berlin toast format
Definition: codec_id.h:442
@ AV_CODEC_ID_PCM_F32BE
Definition: codec_id.h:333
@ AV_CODEC_ID_ADPCM_G722
Definition: codec_id.h:381
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:314
@ AV_CODEC_ID_ADPCM_XA
Definition: codec_id.h:361
@ AV_CODEC_ID_SDX2_DPCM
Definition: codec_id.h:419
@ AV_CODEC_ID_ADPCM_G726LE
Definition: codec_id.h:389
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:317
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:320
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: codec_id.h:353
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:335
@ AV_CODEC_ID_QCELP
Definition: codec_id.h:448
@ AV_CODEC_ID_MACE3
Definition: codec_id.h:433
@ AV_CODEC_ID_MACE6
Definition: codec_id.h:434
@ AV_CODEC_ID_QDM2
Definition: codec_id.h:443
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:322
@ AV_CODEC_ID_QDMC
Definition: codec_id.h:474
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:319
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:636
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:871
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:411
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:74
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
const char * key
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1120
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1126
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header.
Definition: id3v2.c:1142
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1182
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4945
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
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:56
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
version
Definition: libkvazaar.c:326
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:547
uint32_t tag
Definition: movenc.c:1611
unsigned bps
Definition: movenc.c:1612
int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
Parse replaygain tags and export them as per-stream side data.
Definition: replaygain.c:91
int block_duration
Definition: aiffdec.c:37
int64_t data_end
Definition: aiffdec.c:36
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
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
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int block_align
Audio only.
Definition: codec_par.h:177
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
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
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:924
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
#define av_free(p)
#define avpriv_request_sample(...)
#define av_malloc(s)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
int size
if(ret< 0)
Definition: vf_mcdeint.c:282
static const uint8_t offset[127][2]
Definition: vf_spp.c:107