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oggenc.c
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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  int eos;
58  unsigned page_count; ///< number of page buffered
59  OGGPage page; ///< current page
60  unsigned serial_num; ///< serial number
61  int64_t last_granule; ///< last packet granule
63 
64 typedef struct OGGPageList {
66  struct OGGPageList *next;
67 } OGGPageList;
68 
69 typedef struct OGGContext {
70  const AVClass *class;
72  int pref_size; ///< preferred page size (0 => fill all segments)
73  int64_t pref_duration; ///< preferred page duration (0 => fill all segments)
75 } OGGContext;
76 
77 #define OFFSET(x) offsetof(OGGContext, x)
78 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
79 
80 static const AVOption options[] = {
81  { "serial_offset", "serial number offset",
82  OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM },
83  { "oggpagesize", "Set preferred Ogg page size.",
84  OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, PARAM},
85  { "pagesize", "preferred page size in bytes (deprecated)",
86  OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
87  { "page_duration", "preferred page duration, in microseconds",
88  OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
89  { NULL },
90 };
91 
92 #define OGG_CLASS(flavor, name)\
93 static const AVClass flavor ## _muxer_class = {\
94  .class_name = #name " muxer",\
95  .item_name = av_default_item_name,\
96  .option = options,\
97  .version = LIBAVUTIL_VERSION_INT,\
98 };
99 
100 static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
101 {
102  int64_t pos = avio_tell(pb);
103  uint32_t checksum = ffio_get_checksum(pb);
104  avio_seek(pb, crc_offset, SEEK_SET);
105  avio_wb32(pb, checksum);
106  avio_seek(pb, pos, SEEK_SET);
107 }
108 
109 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
110 {
111  OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
112  AVIOContext *pb;
113  int64_t crc_offset;
114  int ret, size;
115  uint8_t *buf;
116 
117  ret = avio_open_dyn_buf(&pb);
118  if (ret < 0)
119  return ret;
121  ffio_wfourcc(pb, "OggS");
122  avio_w8(pb, 0);
123  avio_w8(pb, page->flags | extra_flags);
124  avio_wl64(pb, page->granule);
125  avio_wl32(pb, oggstream->serial_num);
126  avio_wl32(pb, oggstream->page_counter++);
127  crc_offset = avio_tell(pb);
128  avio_wl32(pb, 0); // crc
129  avio_w8(pb, page->segments_count);
130  avio_write(pb, page->segments, page->segments_count);
131  avio_write(pb, page->data, page->size);
132 
133  ogg_update_checksum(s, pb, crc_offset);
134  avio_flush(pb);
135 
136  size = avio_close_dyn_buf(pb, &buf);
137  if (size < 0)
138  return size;
139 
140  avio_write(s->pb, buf, size);
141  avio_flush(s->pb);
142  av_free(buf);
143  oggstream->page_count--;
144  return 0;
145 }
146 
147 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
148 {
149  return oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1));
150 }
151 
152 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
153 {
154  if (oggstream->kfgshift)
155  return (granule>>oggstream->kfgshift) +
156  (granule & ((1<<oggstream->kfgshift)-1));
157  else
158  return granule;
159 }
160 
162 {
163  AVStream *st2 = s->streams[next->stream_index];
164  AVStream *st = s->streams[page->stream_index];
165  int64_t next_granule, cur_granule;
166 
167  if (next->granule == -1 || page->granule == -1)
168  return 0;
169 
170  next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
171  st2->time_base, AV_TIME_BASE_Q);
172  cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
173  st ->time_base, AV_TIME_BASE_Q);
174  return next_granule > cur_granule;
175 }
176 
177 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
178 {
179  oggstream->page.granule = -1;
180  oggstream->page.flags = 0;
181  oggstream->page.segments_count = 0;
182  oggstream->page.size = 0;
183  return 0;
184 }
185 
187 {
188  OGGContext *ogg = s->priv_data;
189  OGGPageList **p = &ogg->page_list;
190  OGGPageList *l = av_mallocz(sizeof(*l));
191 
192  if (!l)
193  return AVERROR(ENOMEM);
194  l->page = oggstream->page;
195 
196  oggstream->page.start_granule = oggstream->page.granule;
197  oggstream->page_count++;
198  ogg_reset_cur_page(oggstream);
199 
200  while (*p) {
201  if (ogg_compare_granule(s, &(*p)->page, &l->page))
202  break;
203  p = &(*p)->next;
204  }
205  l->next = *p;
206  *p = l;
207 
208  return 0;
209 }
210 
212  uint8_t *data, unsigned size, int64_t granule,
213  int header)
214 {
215  OGGStreamContext *oggstream = st->priv_data;
216  OGGContext *ogg = s->priv_data;
217  int total_segments = size / 255 + 1;
218  uint8_t *p = data;
219  int i, segments, len, flush = 0;
220 
221  // Handles VFR by flushing page because this frame needs to have a timestamp
222  // For theora, keyframes also need to have a timestamp to correctly mark
223  // them as such, otherwise seeking will not work correctly at the very
224  // least with old libogg versions.
225  // Do not try to flush header packets though, that will create broken files.
226  if (st->codecpar->codec_id == AV_CODEC_ID_THEORA && !header &&
227  (ogg_granule_to_timestamp(oggstream, granule) >
228  ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
229  ogg_key_granule(oggstream, granule))) {
230  if (oggstream->page.granule != -1)
231  ogg_buffer_page(s, oggstream);
232  flush = 1;
233  }
234 
235  // avoid a continued page
236  if (!header && oggstream->page.size > 0 &&
237  MAX_PAGE_SIZE - oggstream->page.size < size) {
238  ogg_buffer_page(s, oggstream);
239  }
240 
241  for (i = 0; i < total_segments; ) {
242  OGGPage *page = &oggstream->page;
243 
244  segments = FFMIN(total_segments - i, 255 - page->segments_count);
245 
246  if (i && !page->segments_count)
247  page->flags |= 1; // continued packet
248 
249  memset(page->segments+page->segments_count, 255, segments - 1);
250  page->segments_count += segments - 1;
251 
252  len = FFMIN(size, segments*255);
253  page->segments[page->segments_count++] = len - (segments-1)*255;
254  memcpy(page->data+page->size, p, len);
255  p += len;
256  size -= len;
257  i += segments;
258  page->size += len;
259 
260  if (i == total_segments)
261  page->granule = granule;
262 
263  {
264  AVStream *st = s->streams[page->stream_index];
265 
266  int64_t start = av_rescale_q(page->start_granule, st->time_base,
268  int64_t next = av_rescale_q(page->granule, st->time_base,
270 
271  if (page->segments_count == 255) {
272  ogg_buffer_page(s, oggstream);
273  } else if (!header) {
274  if ((ogg->pref_size > 0 && page->size >= ogg->pref_size) ||
275  (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
276  ogg_buffer_page(s, oggstream);
277  }
278  }
279  }
280  }
281 
282  if (flush && oggstream->page.granule != -1)
283  ogg_buffer_page(s, oggstream);
284 
285  return 0;
286 }
287 
288 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
289  int *header_len, AVDictionary **m, int framing_bit)
290 {
291  const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
292  int64_t size;
293  uint8_t *p, *p0;
294 
296 
297  size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
298  if (size > INT_MAX)
299  return NULL;
300  p = av_mallocz(size);
301  if (!p)
302  return NULL;
303  p0 = p;
304 
305  p += offset;
306  ff_vorbiscomment_write(&p, m, vendor);
307  if (framing_bit)
308  bytestream_put_byte(&p, 1);
309 
310  *header_len = size;
311  return p0;
312 }
313 
315  OGGStreamContext *oggstream, int bitexact,
316  AVDictionary **m)
317 {
318  uint8_t *p;
319 
321  return AVERROR(EINVAL);
322 
323  // first packet: STREAMINFO
324  oggstream->header_len[0] = 51;
325  oggstream->header[0] = av_mallocz(51); // per ogg flac specs
326  p = oggstream->header[0];
327  if (!p)
328  return AVERROR(ENOMEM);
329  bytestream_put_byte(&p, 0x7F);
330  bytestream_put_buffer(&p, "FLAC", 4);
331  bytestream_put_byte(&p, 1); // major version
332  bytestream_put_byte(&p, 0); // minor version
333  bytestream_put_be16(&p, 1); // headers packets without this one
334  bytestream_put_buffer(&p, "fLaC", 4);
335  bytestream_put_byte(&p, 0x00); // streaminfo
336  bytestream_put_be24(&p, 34);
338 
339  // second packet: VorbisComment
340  p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
341  if (!p)
342  return AVERROR(ENOMEM);
343  oggstream->header[1] = p;
344  bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
345  bytestream_put_be24(&p, oggstream->header_len[1] - 4);
346 
347  return 0;
348 }
349 
350 #define SPEEX_HEADER_SIZE 80
351 
353  OGGStreamContext *oggstream, int bitexact,
354  AVDictionary **m)
355 {
356  uint8_t *p;
357 
359  return AVERROR_INVALIDDATA;
360 
361  // first packet: Speex header
363  if (!p)
364  return AVERROR(ENOMEM);
365  oggstream->header[0] = p;
366  oggstream->header_len[0] = SPEEX_HEADER_SIZE;
368  AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0
369 
370  // second packet: VorbisComment
371  p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
372  if (!p)
373  return AVERROR(ENOMEM);
374  oggstream->header[1] = p;
375 
376  return 0;
377 }
378 
379 #define OPUS_HEADER_SIZE 19
380 
382  OGGStreamContext *oggstream, int bitexact,
383  AVDictionary **m)
384 {
385  uint8_t *p;
386 
387  if (par->extradata_size < OPUS_HEADER_SIZE)
388  return AVERROR_INVALIDDATA;
389 
390  /* first packet: Opus header */
391  p = av_mallocz(par->extradata_size);
392  if (!p)
393  return AVERROR(ENOMEM);
394  oggstream->header[0] = p;
395  oggstream->header_len[0] = par->extradata_size;
397 
398  /* second packet: VorbisComment */
399  p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
400  if (!p)
401  return AVERROR(ENOMEM);
402  oggstream->header[1] = p;
403  bytestream_put_buffer(&p, "OpusTags", 8);
404 
405  return 0;
406 }
407 
409 {
410  OGGContext *ogg = s->priv_data;
411  OGGPageList *next, *p;
412 
413  if (!ogg->page_list)
414  return;
415 
416  for (p = ogg->page_list; p; ) {
417  OGGStreamContext *oggstream =
419  if (oggstream->page_count < 2 && !flush)
420  break;
421  ogg_write_page(s, &p->page,
422  flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
423  next = p->next;
424  av_freep(&p);
425  p = next;
426  }
427  ogg->page_list = p;
428 }
429 
431 {
432  OGGContext *ogg = s->priv_data;
433  OGGStreamContext *oggstream = NULL;
434  int i, j;
435 
436  if (ogg->pref_size)
437  av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
438 
439  for (i = 0; i < s->nb_streams; i++) {
440  AVStream *st = s->streams[i];
441  unsigned serial_num = i + ogg->serial_offset;
442 
443  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
444  if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
445  /* Opus requires a fixed 48kHz clock */
446  avpriv_set_pts_info(st, 64, 1, 48000);
447  else
448  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
449  }
450 
451  if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
456  av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
457  return AVERROR(EINVAL);
458  }
459 
460  if (!st->codecpar->extradata || !st->codecpar->extradata_size) {
461  av_log(s, AV_LOG_ERROR, "No extradata present\n");
462  return AVERROR_INVALIDDATA;
463  }
464  oggstream = av_mallocz(sizeof(*oggstream));
465  if (!oggstream)
466  return AVERROR(ENOMEM);
467 
468  oggstream->page.stream_index = i;
469 
470  if (!(s->flags & AVFMT_FLAG_BITEXACT))
471  do {
472  serial_num = av_get_random_seed();
473  for (j = 0; j < i; j++) {
474  OGGStreamContext *sc = s->streams[j]->priv_data;
475  if (serial_num == sc->serial_num)
476  break;
477  }
478  } while (j < i);
479  oggstream->serial_num = serial_num;
480 
482 
483  st->priv_data = oggstream;
484  if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
485  int err = ogg_build_flac_headers(st->codecpar, oggstream,
487  &st->metadata);
488  if (err) {
489  av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
490  av_freep(&st->priv_data);
491  return err;
492  }
493  } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
494  int err = ogg_build_speex_headers(st->codecpar, oggstream,
496  &st->metadata);
497  if (err) {
498  av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
499  av_freep(&st->priv_data);
500  return err;
501  }
502  } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
503  int err = ogg_build_opus_headers(st->codecpar, oggstream,
505  &st->metadata);
506  if (err) {
507  av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
508  av_freep(&st->priv_data);
509  return err;
510  }
511  } else {
512  uint8_t *p;
513  const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
514  int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
515  int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
516 
518  st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
519  (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
520  av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
521  av_freep(&st->priv_data);
522  return AVERROR_INVALIDDATA;
523  }
524 
526  &oggstream->header_len[1], &st->metadata,
527  framing_bit);
528  oggstream->header[1] = p;
529  if (!p)
530  return AVERROR(ENOMEM);
531 
532  bytestream_put_byte(&p, header_type);
533  bytestream_put_buffer(&p, cstr, 6);
534 
535  if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
536  /** KFGSHIFT is the width of the less significant section of the granule position
537  The less significant section is the frame count since the last keyframe */
538  oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
539  oggstream->vrev = oggstream->header[0][9];
540  av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
541  oggstream->kfgshift, oggstream->vrev);
542  }
543  }
544  }
545 
546  for (j = 0; j < s->nb_streams; j++) {
547  OGGStreamContext *oggstream = s->streams[j]->priv_data;
548  ogg_buffer_data(s, s->streams[j], oggstream->header[0],
549  oggstream->header_len[0], 0, 1);
550  oggstream->page.flags |= 2; // bos
551  ogg_buffer_page(s, oggstream);
552  }
553  for (j = 0; j < s->nb_streams; j++) {
554  AVStream *st = s->streams[j];
555  OGGStreamContext *oggstream = st->priv_data;
556  for (i = 1; i < 3; i++) {
557  if (oggstream->header_len[i])
558  ogg_buffer_data(s, st, oggstream->header[i],
559  oggstream->header_len[i], 0, 1);
560  }
561  ogg_buffer_page(s, oggstream);
562  }
563 
564  oggstream->page.start_granule = AV_NOPTS_VALUE;
565 
566  ogg_write_pages(s, 2);
567 
568  return 0;
569 }
570 
572 {
573  AVStream *st = s->streams[pkt->stream_index];
574  OGGStreamContext *oggstream = st->priv_data;
575  int ret;
576  int64_t granule;
577 
578  if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
579  int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
580  int pframe_count;
581  if (pkt->flags & AV_PKT_FLAG_KEY)
582  oggstream->last_kf_pts = pts;
583  pframe_count = pts - oggstream->last_kf_pts;
584  // prevent frame count from overflow if key frame flag is not set
585  if (pframe_count >= (1<<oggstream->kfgshift)) {
586  oggstream->last_kf_pts += pframe_count;
587  pframe_count = 0;
588  }
589  granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
590  } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
591  granule = pkt->pts + pkt->duration +
593  (AVRational){ 1, st->codecpar->sample_rate },
594  st->time_base);
595  else
596  granule = pkt->pts + pkt->duration;
597 
598  if (oggstream->page.start_granule == AV_NOPTS_VALUE)
599  oggstream->page.start_granule = pkt->pts;
600 
601  ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
602  if (ret < 0)
603  return ret;
604 
605  ogg_write_pages(s, 0);
606 
607  oggstream->last_granule = granule;
608 
609  return 0;
610 }
611 
613 {
614  int i;
615 
616  if (pkt)
617  return ogg_write_packet_internal(s, pkt);
618 
619  for (i = 0; i < s->nb_streams; i++) {
620  OGGStreamContext *oggstream = s->streams[i]->priv_data;
621  if (oggstream->page.segments_count)
622  ogg_buffer_page(s, oggstream);
623  }
624 
625  ogg_write_pages(s, 2);
626  return 1;
627 }
628 
630 {
631  int i;
632 
633  /* flush current page if needed */
634  for (i = 0; i < s->nb_streams; i++) {
635  OGGStreamContext *oggstream = s->streams[i]->priv_data;
636 
637  if (oggstream->page.size > 0)
638  ogg_buffer_page(s, oggstream);
639  }
640 
641  ogg_write_pages(s, 1);
642 
643  for (i = 0; i < s->nb_streams; i++) {
644  AVStream *st = s->streams[i];
645  OGGStreamContext *oggstream = st->priv_data;
646  if (st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
649  av_freep(&oggstream->header[0]);
650  }
651  av_freep(&oggstream->header[1]);
652  av_freep(&st->priv_data);
653  }
654  return 0;
655 }
656 
657 #if CONFIG_OGG_MUXER
658 OGG_CLASS(ogg, Ogg)
659 AVOutputFormat ff_ogg_muxer = {
660  .name = "ogg",
661  .long_name = NULL_IF_CONFIG_SMALL("Ogg"),
662  .mime_type = "application/ogg",
663  .extensions = "ogg,ogv"
664 #if !CONFIG_SPX_MUXER
665  ",spx"
666 #endif
667 #if !CONFIG_OPUS_MUXER
668  ",opus"
669 #endif
670  ,
671  .priv_data_size = sizeof(OGGContext),
672  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
674  .video_codec = AV_CODEC_ID_THEORA,
679  .priv_class = &ogg_muxer_class,
680 };
681 #endif
682 
683 #if CONFIG_OGA_MUXER
684 OGG_CLASS(oga, Ogg audio)
685 AVOutputFormat ff_oga_muxer = {
686  .name = "oga",
687  .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"),
688  .mime_type = "audio/ogg",
689  .extensions = "oga",
690  .priv_data_size = sizeof(OGGContext),
691  .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
692  AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
697  .priv_class = &oga_muxer_class,
698 };
699 #endif
700 
701 #if CONFIG_SPX_MUXER
702 OGG_CLASS(spx, Ogg Speex)
703 AVOutputFormat ff_spx_muxer = {
704  .name = "spx",
705  .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"),
706  .mime_type = "audio/ogg",
707  .extensions = "spx",
708  .priv_data_size = sizeof(OGGContext),
709  .audio_codec = AV_CODEC_ID_SPEEX,
714  .priv_class = &spx_muxer_class,
715 };
716 #endif
717 
718 #if CONFIG_OPUS_MUXER
719 OGG_CLASS(opus, Ogg Opus)
720 AVOutputFormat ff_opus_muxer = {
721  .name = "opus",
722  .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"),
723  .mime_type = "audio/ogg",
724  .extensions = "opus",
725  .priv_data_size = sizeof(OGGContext),
726  .audio_codec = AV_CODEC_ID_OPUS,
731  .priv_class = &opus_muxer_class,
732 };
733 #endif
int header_len[3]
Definition: oggenc.c:52
static int ogg_write_header(AVFormatContext *s)
Definition: oggenc.c:430
#define NULL
Definition: coverity.c:32
int64_t granule
Definition: oggenc.c:40
int64_t last_granule
last packet granule
Definition: oggenc.c:61
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#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:1272
AVOption.
Definition: opt.h:245
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
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:58
#define AV_DICT_DONT_OVERWRITE
Don'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:4436
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3922
int size
Definition: avcodec.h:1581
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
uint8_t data[MAX_PAGE_SIZE]
Definition: oggenc.c:45
OGGPage page
Definition: oggenc.c:65
void * priv_data
Definition: avformat.h:891
OGGPage page
current page
Definition: oggenc.c:59
static AVPacket pkt
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:493
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1260
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3914
#define OPUS_HEADER_SIZE
Definition: oggenc.c:379
int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m, const char *vendor_string)
Write a VorbisComment into a buffer.
Definition: vorbiscomment.c:54
static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
Definition: oggenc.c:109
Format I/O context.
Definition: avformat.h:1325
static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
Definition: oggenc.c:100
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:346
uint8_t
AVOptions.
uint16_t size
Definition: oggenc.c:46
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1598
#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:1393
static int ogg_build_speex_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
Definition: oggenc.c:352
int64_t last_kf_pts
Definition: oggenc.c:55
int initial_padding
Audio only.
Definition: avcodec.h:4051
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1436
uint8_t * data
Definition: avcodec.h:1580
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
static const uint8_t header[24]
Definition: sdr2.c:67
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:66
Definition: oggenc.c:38
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1453
static const AVOption options[]
Definition: oggenc.c:80
#define av_log(a,...)
unsigned m
Definition: audioconvert.c:187
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1612
static int ogg_build_flac_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
Definition: oggenc.c:314
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:434
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 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:1539
static int ogg_buffer_data(AVFormatContext *s, AVStream *st, uint8_t *data, unsigned size, int64_t granule, int header)
Definition: oggenc.c:211
static int ogg_build_opus_headers(AVCodecParameters *par, OGGStreamContext *oggstream, int bitexact, AVDictionary **m)
Definition: oggenc.c:381
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:66
int pref_size
preferred page size (0 => fill all segments)
Definition: oggenc.c:72
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#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:3918
int64_t ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string)
Calculate the length in bytes of a VorbisComment.
Definition: vorbiscomment.c:41
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:177
static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
Definition: oggenc.c:152
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1586
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3940
static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
Definition: oggenc.c:571
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
static int ogg_write_trailer(AVFormatContext *s)
Definition: oggenc.c:629
#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:577
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:224
#define FFMIN(a, b)
Definition: common.h:96
int serial_offset
Definition: oggenc.c:74
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:557
const char * name
Definition: avformat.h:522
static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
Definition: oggenc.c:161
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
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
AVDictionary * metadata
Definition: avformat.h:945
static volatile int checksum
Definition: adler32.c:28
uint8_t * header[3]
Definition: oggenc.c:51
#define SPEEX_HEADER_SIZE
Definition: oggenc.c:350
Stream structure.
Definition: avformat.h:876
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:182
static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
Definition: oggenc.c:186
void * buf
Definition: avisynth_c.h:553
int stream_index
Definition: oggenc.c:41
static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: oggenc.c:612
Describe the class of an AVClass context structure.
Definition: log.h:67
#define OGG_CLASS(flavor, name)
Definition: oggenc.c:92
rational number numerator/denominator
Definition: rational.h:43
unsigned long ffio_get_checksum(AVIOContext *s)
Definition: aviobuf.c:569
static uint8_t * ogg_write_vorbiscomment(int64_t offset, int bitexact, int *header_len, AVDictionary **m, int framing_bit)
Definition: oggenc.c:288
unsigned serial_num
serial number
Definition: oggenc.c:60
#define PARAM
Definition: oggenc.c:78
static int64_t pts
Global timestamp for the audio frames.
static int flags
Definition: cpu.c:47
OGGPageList * page_list
Definition: oggenc.c:71
int sample_rate
Audio only.
Definition: avcodec.h:4032
Main libavformat public API header.
#define OFFSET(x)
Definition: oggenc.c:77
static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
Definition: oggenc.c:147
int kfgshift
for theora granule
Definition: oggenc.c:54
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:1353
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:498
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3936
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:354
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
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:114
AVCodecParameters * codecpar
Definition: avformat.h:1228
int stream_index
Definition: avcodec.h:1582
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
int64_t pref_duration
preferred page duration (0 => fill all segments)
Definition: oggenc.c:73
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:499
static void ogg_write_pages(AVFormatContext *s, int flush)
Definition: oggenc.c:408
This structure stores compressed data.
Definition: avcodec.h:1557
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1573
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#define AV_WL32(p, v)
Definition: intreadwrite.h:426