FFmpeg
oggparsevorbis.c
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1 /*
2  * Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
3  *
4  * Permission is hereby granted, free of charge, to any person
5  * obtaining a copy of this software and associated documentation
6  * files (the "Software"), to deal in the Software without
7  * restriction, including without limitation the rights to use, copy,
8  * modify, merge, publish, distribute, sublicense, and/or sell copies
9  * of the Software, and to permit persons to whom the Software is
10  * furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be
13  * included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 #include <stdlib.h>
26 
27 #include "libavutil/avstring.h"
28 #include "libavutil/base64.h"
29 #include "libavutil/bswap.h"
30 #include "libavutil/dict.h"
31 
32 #include "libavcodec/bytestream.h"
34 
35 #include "avformat.h"
36 #include "flac_picture.h"
37 #include "internal.h"
38 #include "oggdec.h"
39 #include "vorbiscomment.h"
40 #include "replaygain.h"
41 
43 {
44  int i, cnum, h, m, s, ms, keylen = strlen(key);
45  AVChapter *chapter = NULL;
46 
47  if (keylen < 9 || av_strncasecmp(key, "CHAPTER", 7) || sscanf(key+7, "%03d", &cnum) != 1)
48  return 0;
49 
50  if (keylen <= 10) {
51  if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
52  return 0;
53 
54  avpriv_new_chapter(as, cnum, (AVRational) { 1, 1000 },
55  ms + 1000 * (s + 60 * (m + 60 * h)),
57  av_free(val);
58  } else if (!av_strcasecmp(key + keylen - 4, "NAME")) {
59  for (i = 0; i < as->nb_chapters; i++)
60  if (as->chapters[i]->id == cnum) {
61  chapter = as->chapters[i];
62  break;
63  }
64  if (!chapter)
65  return 0;
66 
67  av_dict_set(&chapter->metadata, "title", val, AV_DICT_DONT_STRDUP_VAL);
68  } else
69  return 0;
70 
71  av_free(key);
72  return 1;
73 }
74 
76  const uint8_t *buf, int size)
77 {
78  int updates = ff_vorbis_comment(as, &st->metadata, buf, size, 1);
79 
80  if (updates > 0) {
82  }
83 
84  return updates;
85 }
86 
88  const uint8_t *buf, int size,
89  int parse_picture)
90 {
91  const uint8_t *p = buf;
92  const uint8_t *end = buf + size;
93  int updates = 0;
94  unsigned n;
95  int s;
96 
97  /* must have vendor_length and user_comment_list_length */
98  if (size < 8)
99  return AVERROR_INVALIDDATA;
100 
101  s = bytestream_get_le32(&p);
102 
103  if (end - p - 4 < s || s < 0)
104  return AVERROR_INVALIDDATA;
105 
106  p += s;
107 
108  n = bytestream_get_le32(&p);
109 
110  while (end - p >= 4 && n > 0) {
111  const char *t, *v;
112  int tl, vl;
113 
114  s = bytestream_get_le32(&p);
115 
116  if (end - p < s || s < 0)
117  break;
118 
119  t = p;
120  p += s;
121  n--;
122 
123  v = memchr(t, '=', s);
124  if (!v)
125  continue;
126 
127  tl = v - t;
128  vl = s - tl - 1;
129  v++;
130 
131  if (tl && vl) {
132  char *tt, *ct;
133 
134  tt = av_malloc(tl + 1);
135  ct = av_malloc(vl + 1);
136  if (!tt || !ct) {
137  av_freep(&tt);
138  av_freep(&ct);
139  return AVERROR(ENOMEM);
140  }
141 
142  memcpy(tt, t, tl);
143  tt[tl] = 0;
144 
145  memcpy(ct, v, vl);
146  ct[vl] = 0;
147 
148  /* The format in which the pictures are stored is the FLAC format.
149  * Xiph says: "The binary FLAC picture structure is base64 encoded
150  * and placed within a VorbisComment with the tag name
151  * 'METADATA_BLOCK_PICTURE'. This is the preferred and
152  * recommended way of embedding cover art within VorbisComments."
153  */
154  if (!av_strcasecmp(tt, "METADATA_BLOCK_PICTURE") && parse_picture) {
155  int ret, len = AV_BASE64_DECODE_SIZE(vl);
156  char *pict = av_malloc(len);
157 
158  if (!pict) {
159  av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n");
160  av_freep(&tt);
161  av_freep(&ct);
162  continue;
163  }
164  ret = av_base64_decode(pict, ct, len);
165  av_freep(&tt);
166  av_freep(&ct);
167  if (ret > 0)
168  ret = ff_flac_parse_picture(as, pict, ret, 0);
169  av_freep(&pict);
170  if (ret < 0) {
171  av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
172  continue;
173  }
174  } else if (!ogm_chapter(as, tt, ct)) {
175  updates++;
176  if (av_dict_get(*m, tt, NULL, 0)) {
177  av_dict_set(m, tt, ";", AV_DICT_APPEND);
178  }
179  av_dict_set(m, tt, ct,
182  }
183  }
184  }
185 
186  if (p != end)
187  av_log(as, AV_LOG_INFO,
188  "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
189  if (n > 0)
190  av_log(as, AV_LOG_INFO,
191  "truncated comment header, %i comments not found\n", n);
192 
194 
195  return updates;
196 }
197 
198 /*
199  * Parse the vorbis header
200  *
201  * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
202  * [vorbis_version] = read 32 bits as unsigned integer | Not used
203  * [audio_channels] = read 8 bit integer as unsigned | Used
204  * [audio_sample_rate] = read 32 bits as unsigned integer | Used
205  * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
206  * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
207  * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
208  * [blocksize_0] = read 4 bits as unsigned integer | Not Used
209  * [blocksize_1] = read 4 bits as unsigned integer | Not Used
210  * [framing_flag] = read one bit | Not Used
211  */
212 
214  unsigned int len[3];
215  unsigned char *packet[3];
217  int64_t final_pts;
219 };
220 
222  struct oggvorbis_private *priv,
223  uint8_t **buf)
224 {
225  int i, offset, len, err;
226  int buf_len;
227  unsigned char *ptr;
228 
229  len = priv->len[0] + priv->len[1] + priv->len[2];
230  buf_len = len + len / 255 + 64;
231 
232  if (*buf)
233  return AVERROR_INVALIDDATA;
234 
235  ptr = *buf = av_realloc(NULL, buf_len);
236  if (!ptr)
237  return AVERROR(ENOMEM);
238  memset(*buf, '\0', buf_len);
239 
240  ptr[0] = 2;
241  offset = 1;
242  offset += av_xiphlacing(&ptr[offset], priv->len[0]);
243  offset += av_xiphlacing(&ptr[offset], priv->len[1]);
244  for (i = 0; i < 3; i++) {
245  memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
246  offset += priv->len[i];
247  av_freep(&priv->packet[i]);
248  }
249  if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
250  return err;
251  return offset;
252 }
253 
254 static void vorbis_cleanup(AVFormatContext *s, int idx)
255 {
256  struct ogg *ogg = s->priv_data;
257  struct ogg_stream *os = ogg->streams + idx;
258  struct oggvorbis_private *priv = os->private;
259  int i;
260  if (os->private) {
261  av_vorbis_parse_free(&priv->vp);
262  for (i = 0; i < 3; i++)
263  av_freep(&priv->packet[i]);
264  }
265 }
266 
268 {
269  struct ogg *ogg = s->priv_data;
270  struct ogg_stream *os = ogg->streams + idx;
271  AVStream *st = s->streams[idx];
272  int ret;
273 
274  if (os->psize <= 8)
275  return 0;
276 
277  /* New metadata packet; release old data. */
278  av_dict_free(&st->metadata);
279  ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
280  os->psize - 8);
281  if (ret < 0)
282  return ret;
283 
284  /* Update the metadata if possible. */
285  av_freep(&os->new_metadata);
286  if (st->metadata) {
288  /* Send an empty dictionary to indicate that metadata has been cleared. */
289  } else {
290  os->new_metadata = av_mallocz(1);
291  os->new_metadata_size = 0;
292  }
293 
294  return ret;
295 }
296 
297 static int vorbis_header(AVFormatContext *s, int idx)
298 {
299  struct ogg *ogg = s->priv_data;
300  AVStream *st = s->streams[idx];
301  struct ogg_stream *os = ogg->streams + idx;
302  struct oggvorbis_private *priv;
303  int pkt_type = os->buf[os->pstart];
304 
305  if (!os->private) {
306  os->private = av_mallocz(sizeof(struct oggvorbis_private));
307  if (!os->private)
308  return AVERROR(ENOMEM);
309  }
310 
311  priv = os->private;
312 
313  if (!(pkt_type & 1))
314  return priv->vp ? 0 : AVERROR_INVALIDDATA;
315 
316  if (os->psize < 1 || pkt_type > 5)
317  return AVERROR_INVALIDDATA;
318 
319  if (priv->packet[pkt_type >> 1])
320  return AVERROR_INVALIDDATA;
321  if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
322  return priv->vp ? 0 : AVERROR_INVALIDDATA;
323 
324  priv->len[pkt_type >> 1] = os->psize;
325  priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
326  if (!priv->packet[pkt_type >> 1])
327  return AVERROR(ENOMEM);
328  memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
329  if (os->buf[os->pstart] == 1) {
330  const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
331  unsigned blocksize, bs0, bs1;
332  int srate;
333  int channels;
334 
335  if (os->psize != 30)
336  return AVERROR_INVALIDDATA;
337 
338  if (bytestream_get_le32(&p) != 0) /* vorbis_version */
339  return AVERROR_INVALIDDATA;
340 
341  channels = bytestream_get_byte(&p);
342  if (st->codecpar->channels && channels != st->codecpar->channels) {
343  av_log(s, AV_LOG_ERROR, "Channel change is not supported\n");
344  return AVERROR_PATCHWELCOME;
345  }
346  st->codecpar->channels = channels;
347  srate = bytestream_get_le32(&p);
348  p += 4; // skip maximum bitrate
349  st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
350  p += 4; // skip minimum bitrate
351 
352  blocksize = bytestream_get_byte(&p);
353  bs0 = blocksize & 15;
354  bs1 = blocksize >> 4;
355 
356  if (bs0 > bs1)
357  return AVERROR_INVALIDDATA;
358  if (bs0 < 6 || bs1 > 13)
359  return AVERROR_INVALIDDATA;
360 
361  if (bytestream_get_byte(&p) != 1) /* framing_flag */
362  return AVERROR_INVALIDDATA;
363 
366 
367  if (srate > 0) {
368  st->codecpar->sample_rate = srate;
369  avpriv_set_pts_info(st, 64, 1, srate);
370  }
371  } else if (os->buf[os->pstart] == 3) {
372  if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) {
373  unsigned new_len;
374 
375  int ret = ff_replaygain_export(st, st->metadata);
376  if (ret < 0)
377  return ret;
378 
379  // drop all metadata we parsed and which is not required by libvorbis
380  new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
381  if (new_len >= 16 && new_len < os->psize) {
382  AV_WL32(priv->packet[1] + new_len - 5, 0);
383  priv->packet[1][new_len - 1] = 1;
384  priv->len[1] = new_len;
385  }
386  }
387  } else {
388  int ret;
389 
390  if (priv->vp)
391  return AVERROR_INVALIDDATA;
392 
393  ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
394  if (ret < 0) {
395  st->codecpar->extradata_size = 0;
396  return ret;
397  }
398  st->codecpar->extradata_size = ret;
399 
401  if (!priv->vp) {
402  av_freep(&st->codecpar->extradata);
403  st->codecpar->extradata_size = 0;
404  return AVERROR_UNKNOWN;
405  }
406  }
407 
408  return 1;
409 }
410 
411 static int vorbis_packet(AVFormatContext *s, int idx)
412 {
413  struct ogg *ogg = s->priv_data;
414  struct ogg_stream *os = ogg->streams + idx;
415  struct oggvorbis_private *priv = os->private;
416  int duration, flags = 0;
417 
418  if (!priv->vp)
419  return AVERROR_INVALIDDATA;
420 
421  /* first packet handling
422  * here we parse the duration of each packet in the first page and compare
423  * the total duration to the page granule to find the encoder delay and
424  * set the first timestamp */
425  if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) {
426  int seg, d;
427  uint8_t *last_pkt = os->buf + os->pstart;
428  uint8_t *next_pkt = last_pkt;
429 
430  av_vorbis_parse_reset(priv->vp);
431  duration = 0;
432  seg = os->segp;
433  d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
434  if (d < 0) {
436  return 0;
437  } else if (flags & VORBIS_FLAG_COMMENT) {
438  vorbis_update_metadata(s, idx);
439  flags = 0;
440  }
441  duration += d;
442  last_pkt = next_pkt = next_pkt + os->psize;
443  for (; seg < os->nsegs; seg++) {
444  if (os->segments[seg] < 255) {
445  int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
446  if (d < 0) {
447  duration = os->granule;
448  break;
449  } else if (flags & VORBIS_FLAG_COMMENT) {
450  vorbis_update_metadata(s, idx);
451  flags = 0;
452  }
453  duration += d;
454  last_pkt = next_pkt + os->segments[seg];
455  }
456  next_pkt += os->segments[seg];
457  }
458  os->lastpts =
459  os->lastdts = os->granule - duration;
460 
461  if (!os->granule && duration) //hack to deal with broken files (Ticket3710)
462  os->lastpts = os->lastdts = AV_NOPTS_VALUE;
463 
464  if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
465  s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
466  if (s->streams[idx]->duration != AV_NOPTS_VALUE)
467  s->streams[idx]->duration -= s->streams[idx]->start_time;
468  }
469  priv->final_pts = AV_NOPTS_VALUE;
470  av_vorbis_parse_reset(priv->vp);
471  }
472 
473  /* parse packet duration */
474  if (os->psize > 0) {
475  duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags);
476  if (duration < 0) {
478  return 0;
479  } else if (flags & VORBIS_FLAG_COMMENT) {
480  vorbis_update_metadata(s, idx);
481  flags = 0;
482  }
483  os->pduration = duration;
484  }
485 
486  /* final packet handling
487  * here we save the pts of the first packet in the final page, sum up all
488  * packet durations in the final page except for the last one, and compare
489  * to the page granule to find the duration of the final packet */
490  if (os->flags & OGG_FLAG_EOS) {
491  if (os->lastpts != AV_NOPTS_VALUE) {
492  priv->final_pts = os->lastpts;
493  priv->final_duration = 0;
494  }
495  if (os->segp == os->nsegs)
496  os->pduration = os->granule - priv->final_pts - priv->final_duration;
497  priv->final_duration += os->pduration;
498  }
499 
500  return 0;
501 }
502 
503 const struct ogg_codec ff_vorbis_codec = {
504  .magic = "\001vorbis",
505  .magicsize = 7,
506  .header = vorbis_header,
507  .packet = vorbis_packet,
508  .cleanup = vorbis_cleanup,
509  .nb_header = 3,
510 };
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1468
int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, const uint8_t *buf, int size)
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int vorbis_header(AVFormatContext *s, int idx)
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
Definition: avformat.h:1006
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggdec.h:31
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
unsigned int pflags
Definition: oggdec.h:67
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
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:4871
static int fixup_vorbis_headers(AVFormatContext *as, struct oggvorbis_private *priv, uint8_t **buf)
int event_flags
Flags indicating events happening on the stream, a combination of AVSTREAM_EVENT_FLAG_*.
Definition: avformat.h:999
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVVorbisParseContext * av_vorbis_parse_init(const uint8_t *extradata, int extradata_size)
Allocate and initialize the Vorbis parser using headers in the extradata.
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:225
const char * key
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int flags
Definition: oggdec.h:76
int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
AVDictionary * metadata
Definition: avformat.h:1200
unsigned char * packet[3]
int64_t lastpts
Definition: oggdec.h:72
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that&#39;s been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:73
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4580
Format I/O context.
Definition: avformat.h:1239
unsigned int psize
Definition: oggdec.h:66
Public dictionary API.
uint8_t
#define av_malloc(s)
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int id
unique ID to identify the chapter
Definition: avformat.h:1197
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1307
int64_t duration
Definition: movenc.c:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
A public API for Vorbis parsing.
ptrdiff_t size
Definition: opengl_enc.c:100
int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
Parse replaygain tags and export them as per-stream side data.
Definition: replaygain.c:91
static void vorbis_cleanup(AVFormatContext *s, int idx)
channels
Definition: aptx.h:33
#define av_log(a,...)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
const AVMetadataConv ff_vorbiscomment_metadata_conv[]
VorbisComment metadata conversion mapping.
Definition: vorbiscomment.c:33
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void av_vorbis_parse_free(AVVorbisParseContext **s)
Free the parser and everything associated with it.
#define PTRDIFF_SPECIFIER
Definition: internal.h:228
#define OGG_FLAG_EOS
Definition: oggdec.h:113
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVChapter ** chapters
Definition: avformat.h:1469
#define FFMAX(a, b)
Definition: common.h:94
uint8_t segments[255]
Definition: oggdec.h:80
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
unsigned int new_metadata_size
Definition: oggdec.h:90
uint64_t granule
Definition: oggdec.h:70
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:215
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
unsigned int pstart
Definition: oggdec.h:65
struct ogg_stream * streams
Definition: oggdec.h:103
int segp
Definition: oggdec.h:79
static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_DICT_APPEND
If the entry already exists, append to it.
Definition: dict.h:80
static int vorbis_update_metadata(AVFormatContext *s, int idx)
AVDictionary * metadata
Definition: avformat.h:944
#define VORBIS_FLAG_COMMENT
Definition: vorbis_parser.h:45
Stream structure.
Definition: avformat.h:880
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:161
unsigned int pduration
Definition: oggdec.h:68
int nsegs
Definition: oggdec.h:79
unsigned int len[3]
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
Definition: avpacket.c:495
void * private
Definition: oggdec.h:91
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
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
Encode extradata length to a buffer.
Definition: utils.c:1831
Rational number (pair of numerator and denominator).
Definition: rational.h:58
uint8_t * new_metadata
Definition: oggdec.h:89
byte swapping routines
int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf, int buf_size, int *flags)
Get the duration for a Vorbis packet.
int64_t lastdts
Definition: oggdec.h:73
AVVorbisParseContext * vp
#define flags(name, subs,...)
Definition: cbs_av1.c:560
const int8_t * magic
Definition: oggdec.h:32
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:929
int sample_rate
Audio only.
Definition: codec_par.h:170
uint8_t * buf
Definition: oggdec.h:62
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:919
static int vorbis_packet(AVFormatContext *s, int idx)
#define AV_BASE64_DECODE_SIZE(x)
Calculate the output size in bytes needed to decode a base64 string with length x to a data buffer...
Definition: base64.h:48
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:402
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
#define av_free(p)
Definition: oggdec.h:102
int len
void * priv_data
Format private data.
Definition: avformat.h:1267
const struct ogg_codec ff_vorbis_codec
int av_base64_decode(uint8_t *out, const char *in_str, int out_size)
Decode a base64-encoded string.
Definition: base64.c:79
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size, int truncate_workaround)
Definition: flac_picture.c:32
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1045
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
static double val(void *priv, double ch)
Definition: aeval.c:76
int i
Definition: input.c:407
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
void av_vorbis_parse_reset(AVVorbisParseContext *s)
#define AV_WL32(p, v)
Definition: intreadwrite.h:426