FFmpeg  4.2.3
oggenc.c
Go to the documentation of this file.
1 /*
2  * Ogg muxer
3  * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at free dot fr>
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 <stdint.h>
23 
24 #include "libavutil/crc.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/random_seed.h"
28 #include "libavcodec/xiph.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavcodec/flac.h"
31 #include "avformat.h"
32 #include "avio_internal.h"
33 #include "internal.h"
34 #include "vorbiscomment.h"
35 
36 #define MAX_PAGE_SIZE 65025
37 
38 typedef struct OGGPage {
39  int64_t start_granule;
40  int64_t granule;
46  uint16_t size;
47 } OGGPage;
48 
49 typedef struct OGGStreamContext {
50  unsigned page_counter;
52  int header_len[3];
53  /** for theora granule */
54  int kfgshift;
55  int64_t last_kf_pts;
56  int vrev;
57  /* for VP8 granule */
58  int isvp8;
59  int eos;
60  unsigned page_count; ///< number of page buffered
61  OGGPage page; ///< current page
62  unsigned serial_num; ///< serial number
63  int64_t last_granule; ///< last packet granule
65 
66 typedef struct OGGPageList {
68  struct OGGPageList *next;
69 } OGGPageList;
70 
71 typedef struct OGGContext {
72  const AVClass *class;
74  int pref_size; ///< preferred page size (0 => fill all segments)
75  int64_t pref_duration; ///< preferred page duration (0 => fill all segments)
77 } OGGContext;
78 
79 #define OFFSET(x) offsetof(OGGContext, x)
80 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
81 
82 static const AVOption options[] = {
83  { "serial_offset", "serial number offset",
84  OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM },
85  { "oggpagesize", "Set preferred Ogg page size.",
86  OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, PARAM},
87  { "pagesize", "preferred page size in bytes (deprecated)",
88  OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
89  { "page_duration", "preferred page duration, in microseconds",
90  OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
91  { NULL },
92 };
93 
94 #define OGG_CLASS(flavor, name)\
95 static const AVClass flavor ## _muxer_class = {\
96  .class_name = #name " muxer",\
97  .item_name = av_default_item_name,\
98  .option = options,\
99  .version = LIBAVUTIL_VERSION_INT,\
100 };
101 
102 static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
103 {
104  int64_t pos = avio_tell(pb);
105  uint32_t checksum = ffio_get_checksum(pb);
106  avio_seek(pb, crc_offset, SEEK_SET);
107  avio_wb32(pb, checksum);
108  avio_seek(pb, pos, SEEK_SET);
109 }
110 
111 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
112 {
113  OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
114  AVIOContext *pb;
115  int64_t crc_offset;
116  int ret, size;
117  uint8_t *buf;
118 
119  ret = avio_open_dyn_buf(&pb);
120  if (ret < 0)
121  return ret;
123  ffio_wfourcc(pb, "OggS");
124  avio_w8(pb, 0);
125  avio_w8(pb, page->flags | extra_flags);
126  avio_wl64(pb, page->granule);
127  avio_wl32(pb, oggstream->serial_num);
128  avio_wl32(pb, oggstream->page_counter++);
129  crc_offset = avio_tell(pb);
130  avio_wl32(pb, 0); // crc
131  avio_w8(pb, page->segments_count);
132  avio_write(pb, page->segments, page->segments_count);
133  avio_write(pb, page->data, page->size);
134 
135  ogg_update_checksum(s, pb, crc_offset);
136  avio_flush(pb);
137 
138  size = avio_close_dyn_buf(pb, &buf);
139  if (size < 0)
140  return size;
141 
142  avio_write(s->pb, buf, size);
143  avio_flush(s->pb);
144  av_free(buf);
145  oggstream->page_count--;
146  return 0;
147 }
148 
149 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
150 {
151  return (oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1))) ||
152  (oggstream->isvp8 && !((granule >> 3) & 0x07ffffff));
153 }
154 
155 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
156 {
157  if (oggstream->kfgshift)
158  return (granule>>oggstream->kfgshift) +
159  (granule & ((1<<oggstream->kfgshift)-1));
160  else if (oggstream->isvp8)
161  return granule >> 32;
162  else
163  return granule;
164 }
165 
167 {
168  AVStream *st2 = s->streams[next->stream_index];
169  AVStream *st = s->streams[page->stream_index];
170  int64_t next_granule, cur_granule;
171 
172  if (next->granule == -1 || page->granule == -1)
173  return 0;
174 
175  next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
176  st2->time_base, AV_TIME_BASE_Q);
177  cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
178  st ->time_base, AV_TIME_BASE_Q);
179  return next_granule > cur_granule;
180 }
181 
182 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
183 {
184  oggstream->page.granule = -1;
185  oggstream->page.flags = 0;
186  oggstream->page.segments_count = 0;
187  oggstream->page.size = 0;
188  return 0;
189 }
190 
192 {
193  OGGContext *ogg = s->priv_data;
194  OGGPageList **p = &ogg->page_list;
195  OGGPageList *l = av_mallocz(sizeof(*l));
196 
197  if (!l)
198  return AVERROR(ENOMEM);
199  l->page = oggstream->page;
200 
201  oggstream->page.start_granule = ogg_granule_to_timestamp(oggstream, oggstream->page.granule);
202  oggstream->page_count++;
203  ogg_reset_cur_page(oggstream);
204 
205  while (*p) {
206  if (ogg_compare_granule(s, &(*p)->page, &l->page))
207  break;
208  p = &(*p)->next;
209  }
210  l->next = *p;
211  *p = l;
212 
213  return 0;
214 }
215 
217  uint8_t *data, unsigned size, int64_t granule,
218  int header)
219 {
220  OGGStreamContext *oggstream = st->priv_data;
221  OGGContext *ogg = s->priv_data;
222  int total_segments = size / 255 + 1;
223  uint8_t *p = data;
224  int i, segments, len, flush = 0;
225 
226  // Handles VFR by flushing page because this frame needs to have a timestamp
227  // For theora and VP8, keyframes also need to have a timestamp to correctly mark
228  // them as such, otherwise seeking will not work correctly at the very
229  // least with old libogg versions.
230  // Do not try to flush header packets though, that will create broken files.
231  if ((st->codecpar->codec_id == AV_CODEC_ID_THEORA || st->codecpar->codec_id == AV_CODEC_ID_VP8) && !header &&
232  (ogg_granule_to_timestamp(oggstream, granule) >
233  ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
234  ogg_key_granule(oggstream, granule))) {
235  if (oggstream->page.granule != -1)
236  ogg_buffer_page(s, oggstream);
237  flush = 1;
238  }
239 
240  // avoid a continued page
241  if (!header && oggstream->page.size > 0 &&
242  MAX_PAGE_SIZE - oggstream->page.size < size) {
243  ogg_buffer_page(s, oggstream);
244  }
245 
246  for (i = 0; i < total_segments; ) {
247  OGGPage *page = &oggstream->page;
248 
249  segments = FFMIN(total_segments - i, 255 - page->segments_count);
250 
251  if (i && !page->segments_count)
252  page->flags |= 1; // continued packet
253 
254  memset(page->segments+page->segments_count, 255, segments - 1);
255  page->segments_count += segments - 1;
256 
257  len = FFMIN(size, segments*255);
258  page->segments[page->segments_count++] = len - (segments-1)*255;
259  memcpy(page->data+page->size, p, len);
260  p += len;
261  size -= len;
262  i += segments;
263  page->size += len;
264 
265  if (i == total_segments)
266  page->granule = granule;
267 
268  {
269  AVStream *st = s->streams[page->stream_index];
270 
271  int64_t start = av_rescale_q(page->start_granule, st->time_base,
273  int64_t next = av_rescale_q(ogg_granule_to_timestamp(oggstream, page->granule),
275 
276  if (page->segments_count == 255) {
277  ogg_buffer_page(s, oggstream);
278  } else if (!header) {
279  if ((ogg->pref_size > 0 && page->size >= ogg->pref_size) ||
280  (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
281  ogg_buffer_page(s, oggstream);
282  }
283  }
284  }
285  }
286 
287  if (flush && oggstream->page.granule != -1)
288  ogg_buffer_page(s, oggstream);
289 
290  return 0;
291 }
292 
293 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
294  int *header_len, AVDictionary **m, int framing_bit,
295  AVChapter **chapters, unsigned int nb_chapters)
296 {
297  const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
298  int64_t size;
299  uint8_t *p, *p0;
300 
302 
303  size = offset + ff_vorbiscomment_length(*m, vendor, chapters, nb_chapters) + framing_bit;
304  if (size > INT_MAX)
305  return NULL;
306  p = av_mallocz(size);
307  if (!p)
308  return NULL;
309  p0 = p;
310 
311  p += offset;
312  ff_vorbiscomment_write(&p, m, vendor, chapters, nb_chapters);
313  if (framing_bit)
314  bytestream_put_byte(&p, 1);
315 
316  *header_len = size;
317  return p0;
318 }
319 
321  OGGStreamContext *oggstream, int bitexact,
322  AVDictionary **m)
323 {
324  uint8_t *p;
325 
327  return AVERROR(EINVAL);
328 
329  // first packet: STREAMINFO
330  oggstream->header_len[0] = 51;
331  oggstream->header[0] = av_mallocz(51); // per ogg flac specs
332  p = oggstream->header[0];
333  if (!p)
334  return AVERROR(ENOMEM);
335  bytestream_put_byte(&p, 0x7F);
336  bytestream_put_buffer(&p, "FLAC", 4);
337  bytestream_put_byte(&p, 1); // major version
338  bytestream_put_byte(&p, 0); // minor version
339  bytestream_put_be16(&p, 1); // headers packets without this one
340  bytestream_put_buffer(&p, "fLaC", 4);
341  bytestream_put_byte(&p, 0x00); // streaminfo
342  bytestream_put_be24(&p, 34);
344 
345  // second packet: VorbisComment
346  p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
347  if (!p)
348  return AVERROR(ENOMEM);
349  oggstream->header[1] = p;
350  bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
351  bytestream_put_be24(&p, oggstream->header_len[1] - 4);
352 
353  return 0;
354 }
355 
356 #define SPEEX_HEADER_SIZE 80
357 
359  OGGStreamContext *oggstream, int bitexact,
360  AVDictionary **m)
361 {
362  uint8_t *p;
363 
365  return AVERROR_INVALIDDATA;
366 
367  // first packet: Speex header
369  if (!p)
370  return AVERROR(ENOMEM);
371  oggstream->header[0] = p;
372  oggstream->header_len[0] = SPEEX_HEADER_SIZE;
374  AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0
375 
376  // second packet: VorbisComment
377  p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
378  if (!p)
379  return AVERROR(ENOMEM);
380  oggstream->header[1] = p;
381 
382  return 0;
383 }
384 
385 #define OPUS_HEADER_SIZE 19
386 
388  OGGStreamContext *oggstream, int bitexact,
389  AVDictionary **m, AVChapter **chapters,
390  unsigned int nb_chapters)
391 {
392  uint8_t *p;
393 
394  if (par->extradata_size < OPUS_HEADER_SIZE)
395  return AVERROR_INVALIDDATA;
396 
397  /* first packet: Opus header */
398  p = av_mallocz(par->extradata_size);
399  if (!p)
400  return AVERROR(ENOMEM);
401  oggstream->header[0] = p;
402  oggstream->header_len[0] = par->extradata_size;
404 
405  /* second packet: VorbisComment */
406  p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0, chapters, nb_chapters);
407  if (!p)
408  return AVERROR(ENOMEM);
409  oggstream->header[1] = p;
410  bytestream_put_buffer(&p, "OpusTags", 8);
411 
412  return 0;
413 }
414 
415 #define VP8_HEADER_SIZE 26
416 
418  OGGStreamContext *oggstream, int bitexact)
419 {
420  AVCodecParameters *par = st->codecpar;
421  uint8_t *p;
422 
423  /* first packet: VP8 header */
425  if (!p)
426  return AVERROR(ENOMEM);
427  oggstream->header[0] = p;
428  oggstream->header_len[0] = VP8_HEADER_SIZE;
429  bytestream_put_byte(&p, 0x4f); // HDRID
430  bytestream_put_buffer(&p, "VP80", 4); // Identifier
431  bytestream_put_byte(&p, 1); // HDRTYP
432  bytestream_put_byte(&p, 1); // VMAJ
433  bytestream_put_byte(&p, 0); // VMIN
434  bytestream_put_be16(&p, par->width);
435  bytestream_put_be16(&p, par->height);
436  bytestream_put_be24(&p, par->sample_aspect_ratio.num);
437  bytestream_put_be24(&p, par->sample_aspect_ratio.den);
438  if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) {
439  // OggVP8 requires pts to increase by 1 per visible frame, so use the least common
440  // multiple framerate if available.
441  av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
442  st->time_base.num, st->time_base.den,
443  st->r_frame_rate.den, st->r_frame_rate.num);
445  }
446  bytestream_put_be32(&p, st->time_base.den);
447  bytestream_put_be32(&p, st->time_base.num);
448 
449  /* optional second packet: VorbisComment */
451  p = ogg_write_vorbiscomment(7, bitexact, &oggstream->header_len[1], &st->metadata, 0, NULL, 0);
452  if (!p)
453  return AVERROR(ENOMEM);
454  oggstream->header[1] = p;
455  bytestream_put_byte(&p, 0x4f); // HDRID
456  bytestream_put_buffer(&p, "VP80", 4); // Identifier
457  bytestream_put_byte(&p, 2); // HDRTYP
458  bytestream_put_byte(&p, 0x20);
459  }
460 
461  oggstream->isvp8 = 1;
462 
463  return 0;
464 }
465 
467 {
468  OGGContext *ogg = s->priv_data;
469  OGGPageList *next, *p;
470 
471  if (!ogg->page_list)
472  return;
473 
474  for (p = ogg->page_list; p; ) {
475  OGGStreamContext *oggstream =
477  if (oggstream->page_count < 2 && !flush)
478  break;
479  ogg_write_page(s, &p->page,
480  flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
481  next = p->next;
482  av_freep(&p);
483  p = next;
484  }
485  ogg->page_list = p;
486 }
487 
489 {
490  OGGContext *ogg = s->priv_data;
491  OGGStreamContext *oggstream = NULL;
492  int i, j;
493 
494  if (ogg->pref_size)
495  av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
496 
497  for (i = 0; i < s->nb_streams; i++) {
498  AVStream *st = s->streams[i];
499  unsigned serial_num = i + ogg->serial_offset;
500 
501  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
502  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
503  /* Opus requires a fixed 48kHz clock */
504  avpriv_set_pts_info(st, 64, 1, 48000);
505  else
506  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
507  }
508 
509  if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
515  av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
516  return AVERROR(EINVAL);
517  }
518 
519  if ((!st->codecpar->extradata || !st->codecpar->extradata_size) &&
521  av_log(s, AV_LOG_ERROR, "No extradata present\n");
522  return AVERROR_INVALIDDATA;
523  }
524  oggstream = av_mallocz(sizeof(*oggstream));
525  if (!oggstream)
526  return AVERROR(ENOMEM);
527 
528  oggstream->page.stream_index = i;
529 
530  if (!(s->flags & AVFMT_FLAG_BITEXACT))
531  do {
532  serial_num = av_get_random_seed();
533  for (j = 0; j < i; j++) {
534  OGGStreamContext *sc = s->streams[j]->priv_data;
535  if (serial_num == sc->serial_num)
536  break;
537  }
538  } while (j < i);
539  oggstream->serial_num = serial_num;
540 
542 
543  st->priv_data = oggstream;
544  if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
545  int err = ogg_build_flac_headers(st->codecpar, oggstream,
547  &st->metadata);
548  if (err) {
549  av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
550  return err;
551  }
552  } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
553  int err = ogg_build_speex_headers(st->codecpar, oggstream,
555  &st->metadata);
556  if (err) {
557  av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
558  return err;
559  }
560  } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
561  int err = ogg_build_opus_headers(st->codecpar, oggstream,
563  &st->metadata, s->chapters, s->nb_chapters);
564  if (err) {
565  av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
566  return err;
567  }
568  } else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
569  int err = ogg_build_vp8_headers(s, st, oggstream,
571  if (err) {
572  av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n");
573  return err;
574  }
575  } else {
576  uint8_t *p;
577  const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
578  int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
579  int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
580 
582  st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
583  (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
584  av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
585  oggstream->header[1] = NULL;
586  return AVERROR_INVALIDDATA;
587  }
588 
590  &oggstream->header_len[1], &st->metadata,
591  framing_bit, NULL, 0);
592  oggstream->header[1] = p;
593  if (!p)
594  return AVERROR(ENOMEM);
595 
596  bytestream_put_byte(&p, header_type);
597  bytestream_put_buffer(&p, cstr, 6);
598 
599  if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
600  int den = AV_RB32(oggstream->header[0] + 22), num = AV_RB32(oggstream->header[0] + 26);
601  /* Make sure to use time base stored in the Theora stream header to write
602  correct timestamps */
603  if (st->time_base.num != num || st->time_base.den != den) {
604  av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
605  st->time_base.num, st->time_base.den, num, den);
606  avpriv_set_pts_info(st, 64, num, den);
607  }
608  /** KFGSHIFT is the width of the less significant section of the granule position
609  The less significant section is the frame count since the last keyframe */
610  oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
611  oggstream->vrev = oggstream->header[0][9];
612  av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
613  oggstream->kfgshift, oggstream->vrev);
614  }
615  }
616  }
617 
618  return 0;
619 }
620 
622 {
623  OGGStreamContext *oggstream = NULL;
624  int i, j;
625 
626  for (j = 0; j < s->nb_streams; j++) {
627  oggstream = s->streams[j]->priv_data;
628  ogg_buffer_data(s, s->streams[j], oggstream->header[0],
629  oggstream->header_len[0], 0, 1);
630  oggstream->page.flags |= 2; // bos
631  ogg_buffer_page(s, oggstream);
632  }
633  for (j = 0; j < s->nb_streams; j++) {
634  AVStream *st = s->streams[j];
635  oggstream = st->priv_data;
636  for (i = 1; i < 3; i++) {
637  if (oggstream->header_len[i])
638  ogg_buffer_data(s, st, oggstream->header[i],
639  oggstream->header_len[i], 0, 1);
640  }
641  ogg_buffer_page(s, oggstream);
642  }
643 
644  oggstream->page.start_granule = AV_NOPTS_VALUE;
645 
646  ogg_write_pages(s, 2);
647 
648  return 0;
649 }
650 
652 {
653  AVStream *st = s->streams[pkt->stream_index];
654  OGGStreamContext *oggstream = st->priv_data;
655  int ret;
656  int64_t granule;
657 
658  if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
659  int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
660  int pframe_count;
661  if (pkt->flags & AV_PKT_FLAG_KEY)
662  oggstream->last_kf_pts = pts;
663  pframe_count = pts - oggstream->last_kf_pts;
664  // prevent frame count from overflow if key frame flag is not set
665  if (pframe_count >= (1<<oggstream->kfgshift)) {
666  oggstream->last_kf_pts += pframe_count;
667  pframe_count = 0;
668  }
669  granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
670  } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
671  granule = pkt->pts + pkt->duration +
673  (AVRational){ 1, st->codecpar->sample_rate },
674  st->time_base);
675  else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
676  int64_t pts, invcnt, dist;
677  int visible;
678 
679  visible = (pkt->data[0] >> 4) & 1;
680  pts = pkt->pts + pkt->duration;
681  invcnt = (oggstream->last_granule >> 30) & 3;
682  invcnt = visible ? 3 : (invcnt == 3 ? 0 : invcnt + 1);
683  dist = (pkt->flags & AV_PKT_FLAG_KEY) ? 0 : ((oggstream->last_granule >> 3) & 0x07ffffff) + 1;
684 
685  granule = (pts << 32) | (invcnt << 30) | (dist << 3);
686  } else
687  granule = pkt->pts + pkt->duration;
688 
689  if (oggstream->page.start_granule == AV_NOPTS_VALUE)
690  oggstream->page.start_granule = pkt->pts;
691 
692  ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
693  if (ret < 0)
694  return ret;
695 
696  ogg_write_pages(s, 0);
697 
698  oggstream->last_granule = granule;
699 
700  return 0;
701 }
702 
704 {
705  int i;
706 
707  if (pkt)
708  return ogg_write_packet_internal(s, pkt);
709 
710  for (i = 0; i < s->nb_streams; i++) {
711  OGGStreamContext *oggstream = s->streams[i]->priv_data;
712  if (oggstream->page.segments_count)
713  ogg_buffer_page(s, oggstream);
714  }
715 
716  ogg_write_pages(s, 2);
717  return 1;
718 }
719 
721 {
722  int i;
723 
724  /* flush current page if needed */
725  for (i = 0; i < s->nb_streams; i++) {
726  OGGStreamContext *oggstream = s->streams[i]->priv_data;
727 
728  if (oggstream->page.size > 0)
729  ogg_buffer_page(s, oggstream);
730  }
731 
732  ogg_write_pages(s, 1);
733 
734  return 0;
735 }
736 
738 {
739  int i;
740 
741  for (i = 0; i < s->nb_streams; i++) {
742  AVStream *st = s->streams[i];
743  OGGStreamContext *oggstream = st->priv_data;
744  if (!oggstream)
745  continue;
746  if (st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
750  av_freep(&oggstream->header[0]);
751  }
752  av_freep(&oggstream->header[1]);
753  }
754 }
755 
756 #if CONFIG_OGG_MUXER
757 OGG_CLASS(ogg, Ogg)
759  .name = "ogg",
760  .long_name = NULL_IF_CONFIG_SMALL("Ogg"),
761  .mime_type = "application/ogg",
762  .extensions = "ogg"
763 #if !CONFIG_OGV_MUXER
764  ",ogv"
765 #endif
766 #if !CONFIG_SPX_MUXER
767  ",spx"
768 #endif
769 #if !CONFIG_OPUS_MUXER
770  ",opus"
771 #endif
772  ,
773  .priv_data_size = sizeof(OGGContext),
774  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
776  .video_codec = AV_CODEC_ID_THEORA,
777  .init = ogg_init,
781  .deinit = ogg_free,
783  .priv_class = &ogg_muxer_class,
784 };
785 #endif
786 
787 #if CONFIG_OGA_MUXER
788 OGG_CLASS(oga, Ogg audio)
790  .name = "oga",
791  .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"),
792  .mime_type = "audio/ogg",
793  .extensions = "oga",
794  .priv_data_size = sizeof(OGGContext),
795  .audio_codec = AV_CODEC_ID_FLAC,
796  .init = ogg_init,
800  .deinit = ogg_free,
802  .priv_class = &oga_muxer_class,
803 };
804 #endif
805 
806 #if CONFIG_OGV_MUXER
807 OGG_CLASS(ogv, Ogg video)
809  .name = "ogv",
810  .long_name = NULL_IF_CONFIG_SMALL("Ogg Video"),
811  .mime_type = "video/ogg",
812  .extensions = "ogv",
813  .priv_data_size = sizeof(OGGContext),
814  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
816  .video_codec = CONFIG_LIBTHEORA_ENCODER ?
818  .init = ogg_init,
822  .deinit = ogg_free,
824  .priv_class = &ogv_muxer_class,
825 };
826 #endif
827 
828 #if CONFIG_SPX_MUXER
829 OGG_CLASS(spx, Ogg Speex)
831  .name = "spx",
832  .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"),
833  .mime_type = "audio/ogg",
834  .extensions = "spx",
835  .priv_data_size = sizeof(OGGContext),
836  .audio_codec = AV_CODEC_ID_SPEEX,
837  .init = ogg_init,
841  .deinit = ogg_free,
843  .priv_class = &spx_muxer_class,
844 };
845 #endif
846 
847 #if CONFIG_OPUS_MUXER
848 OGG_CLASS(opus, Ogg Opus)
850  .name = "opus",
851  .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"),
852  .mime_type = "audio/ogg",
853  .extensions = "opus",
854  .priv_data_size = sizeof(OGGContext),
855  .audio_codec = AV_CODEC_ID_OPUS,
856  .init = ogg_init,
860  .deinit = ogg_free,
862  .priv_class = &opus_muxer_class,
863 };
864 #endif
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1587
int header_len[3]
Definition: oggenc.c:52
static int ogg_write_header(AVFormatContext *s)
Definition: oggenc.c:621
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:690
#define NULL
Definition: coverity.c:32
int64_t granule
Definition: oggenc.c:40
int64_t last_granule
last packet granule
Definition: oggenc.c:63
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1415
AVOption.
Definition: opt.h:246
static void flush(AVCodecContext *avctx)
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
unsigned page_count
number of page buffered
Definition: oggenc.c:60
#define AV_DICT_DONT_OVERWRITE
Don&#39;t overwrite existing entries.
Definition: dict.h:79
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:4903
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4033
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1478
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
uint8_t data[MAX_PAGE_SIZE]
Definition: oggenc.c:45
OGGPage page
Definition: oggenc.c:67
void * priv_data
Definition: avformat.h:896
OGGPage page
current page
Definition: oggenc.c:61
static AVPacket pkt
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:476
#define CONFIG_LIBTHEORA_ENCODER
Definition: config.h:1406
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1386
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:477
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
#define OPUS_HEADER_SIZE
Definition: oggenc.c:385
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
Definition: oggenc.c:111
Format I/O context.
Definition: avformat.h:1358
static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
Definition: oggenc.c:102
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
uint8_t
static void ogg_free(AVFormatContext *s)
Definition: oggenc.c:737
int width
Video only.
Definition: avcodec.h:4023
AVOptions.
uint16_t size
Definition: oggenc.c:46
#define AV_RB32
Definition: intreadwrite.h:130
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
#define MAX_PAGE_SIZE
Definition: oggenc.c:36
uint8_t segments_count
Definition: oggenc.c:43
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
static int ogg_build_speex_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
Definition: oggenc.c:358
int64_t last_kf_pts
Definition: oggenc.c:55
Public header for CRC hash function implementation.
int initial_padding
Audio only.
Definition: avcodec.h:4086
AVOutputFormat ff_spx_muxer
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
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1489
uint8_t * data
Definition: avcodec.h:1477
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
static const uint8_t header[24]
Definition: sdr2.c:67
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
Definition: oggenc.c:38
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1506
static const AVOption options[]
Definition: oggenc.c:82
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
static int ogg_build_flac_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
Definition: oggenc.c:320
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:457
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
unsigned page_counter
Definition: oggenc.c:50
const AVMetadataConv ff_vorbiscomment_metadata_conv[]
VorbisComment metadata conversion mapping.
Definition: vorbiscomment.c:33
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
static int ogg_buffer_data(AVFormatContext *s, AVStream *st, uint8_t *data, unsigned size, int64_t granule, int header)
Definition: oggenc.c:216
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
int64_t start_granule
Definition: oggenc.c:39
#define AVERROR(e)
Definition: error.h:43
struct OGGPageList * next
Definition: oggenc.c:68
int pref_size
preferred page size (0 => fill all segments)
Definition: oggenc.c:74
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
AVChapter ** chapters
Definition: avformat.h:1588
AVOutputFormat ff_ogv_muxer
int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m, const char *vendor_string, AVChapter **chapters, unsigned int nb_chapters)
Write a VorbisComment into a buffer.
Definition: vorbiscomment.c:65
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
uint8_t flags
Definition: oggenc.c:42
static int ogg_reset_cur_page(OGGStreamContext *oggstream)
Definition: oggenc.c:182
static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
Definition: oggenc.c:155
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
Definition: oggenc.c:651
#define VP8_HEADER_SIZE
Definition: oggenc.c:415
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
static int ogg_write_trailer(AVFormatContext *s)
Definition: oggenc.c:720
#define LIBAVFORMAT_IDENT
Definition: version.h:46
void ffio_init_checksum(AVIOContext *s, unsigned long(*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len), unsigned long checksum)
Definition: aviobuf.c:626
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
static int ogg_build_opus_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m, AVChapter **chapters, unsigned int nb_chapters)
Definition: oggenc.c:387
#define FFMIN(a, b)
Definition: common.h:96
int serial_offset
Definition: oggenc.c:76
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len)
Definition: aviobuf.c:600
int64_t ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string, AVChapter **chapters, unsigned int nb_chapters)
Calculate the length in bytes of a VorbisComment.
Definition: vorbiscomment.c:41
const char * name
Definition: avformat.h:505
static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
Definition: oggenc.c:166
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
#define s(width, name)
Definition: cbs_vp9.c:257
int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, int first_header_size, const uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
#define CONFIG_LIBVORBIS_ENCODER
Definition: config.h:1409
AVDictionary * metadata
Definition: avformat.h:945
static volatile int checksum
Definition: adler32.c:30
uint8_t * header[3]
Definition: oggenc.c:51
#define SPEEX_HEADER_SIZE
Definition: oggenc.c:356
Stream structure.
Definition: avformat.h:881
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
Definition: oggenc.c:191
void * buf
Definition: avisynth_c.h:766
int stream_index
Definition: oggenc.c:41
static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: oggenc.c:703
Describe the class of an AVClass context structure.
Definition: log.h:67
#define OGG_CLASS(flavor, name)
Definition: oggenc.c:94
Rational number (pair of numerator and denominator).
Definition: rational.h:58
unsigned long ffio_get_checksum(AVIOContext *s)
Definition: aviobuf.c:618
unsigned serial_num
serial number
Definition: oggenc.c:62
#define PARAM
Definition: oggenc.c:80
static int64_t pts
OGGPageList * page_list
Definition: oggenc.c:73
static int ogg_init(AVFormatContext *s)
Definition: oggenc.c:488
int sample_rate
Audio only.
Definition: avcodec.h:4067
Main libavformat public API header.
AVOutputFormat ff_oga_muxer
AVOutputFormat ff_ogg_muxer
#define OFFSET(x)
Definition: oggenc.c:79
static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
Definition: oggenc.c:149
int kfgshift
for theora granule
Definition: oggenc.c:54
int den
Denominator.
Definition: rational.h:60
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:368
#define av_free(p)
Definition: oggdec.h:101
int len
void * priv_data
Format private data.
Definition: avformat.h:1386
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
AVOutputFormat ff_opus_muxer
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:377
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
uint8_t segments[255]
Definition: oggenc.c:44
uint32_t av_get_random_seed(void)
Get a seed to use in conjunction with random functions.
Definition: random_seed.c:120
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int stream_index
Definition: avcodec.h:1479
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
int64_t pref_duration
preferred page duration (0 => fill all segments)
Definition: oggenc.c:75
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:482
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1005
static void ogg_write_pages(AVFormatContext *s, int flush)
Definition: oggenc.c:466
This structure stores compressed data.
Definition: avcodec.h:1454
static uint8_t * ogg_write_vorbiscomment(int64_t offset, int bitexact, int *header_len, AVDictionary **m, int framing_bit, AVChapter **chapters, unsigned int nb_chapters)
Definition: oggenc.c:293
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
static int ogg_build_vp8_headers(AVFormatContext *s, AVStream *st, OGGStreamContext *oggstream, int bitexact)
Definition: oggenc.c:417
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_WL32(p, v)
Definition: intreadwrite.h:426