oggenc: accept only STREAMINFO extradata
[ffmpeg.git] / libavformat / oggenc.c
1 /*
2  * Ogg muxer
3  * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at free dot fr>
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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 {
39     int64_t start_granule;
40     int64_t granule;
41     int stream_index;
42     uint8_t flags;
43     uint8_t segments_count;
44     uint8_t segments[255];
45     uint8_t data[MAX_PAGE_SIZE];
46     uint16_t size;
47 } OGGPage;
48
49 typedef struct {
50     unsigned page_counter;
51     uint8_t *header[3];
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
62 } OGGStreamContext;
63
64 typedef struct OGGPageList {
65     OGGPage page;
66     struct OGGPageList *next;
67 } OGGPageList;
68
69 typedef struct {
70     const AVClass *class;
71     OGGPageList *page_list;
72     int pref_size; ///< preferred page size (0 => fill all segments)
73     int64_t pref_duration;      ///< preferred page duration (0 => fill all segments)
74 } OGGContext;
75
76 #define OFFSET(x) offsetof(OGGContext, x)
77 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
78
79 static const AVOption options[] = {
80     { "pagesize", "preferred page size in bytes (deprecated)",
81         OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
82     { "page_duration", "preferred page duration, in microseconds",
83         OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
84     { NULL },
85 };
86
87 #define OGG_CLASS(flavor)\
88 static const AVClass flavor ## _muxer_class = {\
89     .class_name = #flavor " muxer",\
90     .item_name  = av_default_item_name,\
91     .option     = options,\
92     .version    = LIBAVUTIL_VERSION_INT,\
93 };
94
95 static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
96 {
97     int64_t pos = avio_tell(pb);
98     uint32_t checksum = ffio_get_checksum(pb);
99     avio_seek(pb, crc_offset, SEEK_SET);
100     avio_wb32(pb, checksum);
101     avio_seek(pb, pos, SEEK_SET);
102 }
103
104 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
105 {
106     OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
107     AVIOContext *pb;
108     int64_t crc_offset;
109     int ret, size;
110     uint8_t *buf;
111
112     ret = avio_open_dyn_buf(&pb);
113     if (ret < 0)
114         return ret;
115     ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
116     ffio_wfourcc(pb, "OggS");
117     avio_w8(pb, 0);
118     avio_w8(pb, page->flags | extra_flags);
119     avio_wl64(pb, page->granule);
120     avio_wl32(pb, oggstream->serial_num);
121     avio_wl32(pb, oggstream->page_counter++);
122     crc_offset = avio_tell(pb);
123     avio_wl32(pb, 0); // crc
124     avio_w8(pb, page->segments_count);
125     avio_write(pb, page->segments, page->segments_count);
126     avio_write(pb, page->data, page->size);
127
128     ogg_update_checksum(s, pb, crc_offset);
129     avio_flush(pb);
130
131     size = avio_close_dyn_buf(pb, &buf);
132     if (size < 0)
133         return size;
134
135     avio_write(s->pb, buf, size);
136     avio_flush(s->pb);
137     av_free(buf);
138     oggstream->page_count--;
139     return 0;
140 }
141
142 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
143 {
144     if (oggstream->kfgshift)
145         return (granule>>oggstream->kfgshift) +
146             (granule & ((1<<oggstream->kfgshift)-1));
147     else
148         return granule;
149 }
150
151 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
152 {
153     AVStream *st2 = s->streams[next->stream_index];
154     AVStream *st  = s->streams[page->stream_index];
155     int64_t next_granule, cur_granule;
156
157     if (next->granule == -1 || page->granule == -1)
158         return 0;
159
160     next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
161                                 st2->time_base, AV_TIME_BASE_Q);
162     cur_granule  = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
163                                 st ->time_base, AV_TIME_BASE_Q);
164     return next_granule > cur_granule;
165 }
166
167 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
168 {
169     oggstream->page.granule = -1;
170     oggstream->page.flags = 0;
171     oggstream->page.segments_count = 0;
172     oggstream->page.size = 0;
173     return 0;
174 }
175
176 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
177 {
178     OGGContext *ogg = s->priv_data;
179     OGGPageList **p = &ogg->page_list;
180     OGGPageList *l = av_mallocz(sizeof(*l));
181
182     if (!l)
183         return AVERROR(ENOMEM);
184     l->page = oggstream->page;
185
186     oggstream->page.start_granule = oggstream->page.granule;
187     oggstream->page_count++;
188     ogg_reset_cur_page(oggstream);
189
190     while (*p) {
191         if (ogg_compare_granule(s, &(*p)->page, &l->page))
192             break;
193         p = &(*p)->next;
194     }
195     l->next = *p;
196     *p = l;
197
198     return 0;
199 }
200
201 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
202                            uint8_t *data, unsigned size, int64_t granule,
203                            int header)
204 {
205     OGGStreamContext *oggstream = st->priv_data;
206     OGGContext *ogg = s->priv_data;
207     int total_segments = size / 255 + 1;
208     uint8_t *p = data;
209     int i, segments, len, flush = 0;
210
211     // Handles VFR by flushing page because this frame needs to have a timestamp
212     if (st->codec->codec_id == AV_CODEC_ID_THEORA && !header &&
213         ogg_granule_to_timestamp(oggstream, granule) >
214         ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1) {
215         if (oggstream->page.granule != -1)
216             ogg_buffer_page(s, oggstream);
217         flush = 1;
218     }
219
220     // avoid a continued page
221     if (!header && oggstream->page.size > 0 &&
222         MAX_PAGE_SIZE - oggstream->page.size < size) {
223         ogg_buffer_page(s, oggstream);
224     }
225
226     for (i = 0; i < total_segments; ) {
227         OGGPage *page = &oggstream->page;
228
229         segments = FFMIN(total_segments - i, 255 - page->segments_count);
230
231         if (i && !page->segments_count)
232             page->flags |= 1; // continued packet
233
234         memset(page->segments+page->segments_count, 255, segments - 1);
235         page->segments_count += segments - 1;
236
237         len = FFMIN(size, segments*255);
238         page->segments[page->segments_count++] = len - (segments-1)*255;
239         memcpy(page->data+page->size, p, len);
240         p += len;
241         size -= len;
242         i += segments;
243         page->size += len;
244
245         if (i == total_segments)
246             page->granule = granule;
247
248         if (!header) {
249             AVStream *st = s->streams[page->stream_index];
250
251             int64_t start = av_rescale_q(page->start_granule, st->time_base,
252                                          AV_TIME_BASE_Q);
253             int64_t next  = av_rescale_q(page->granule, st->time_base,
254                                          AV_TIME_BASE_Q);
255
256             if (page->segments_count == 255 ||
257                 (ogg->pref_size     > 0 && page->size   >= ogg->pref_size) ||
258                 (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
259                 ogg_buffer_page(s, oggstream);
260             }
261         }
262     }
263
264     if (flush && oggstream->page.granule != -1)
265         ogg_buffer_page(s, oggstream);
266
267     return 0;
268 }
269
270 static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact,
271                                         int *header_len, AVDictionary **m, int framing_bit)
272 {
273     const char *vendor = bitexact ? "Libav" : LIBAVFORMAT_IDENT;
274     int size;
275     uint8_t *p, *p0;
276
277     ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
278
279     size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
280     p = av_mallocz(size);
281     if (!p)
282         return NULL;
283     p0 = p;
284
285     p += offset;
286     ff_vorbiscomment_write(&p, m, vendor);
287     if (framing_bit)
288         bytestream_put_byte(&p, 1);
289
290     *header_len = size;
291     return p0;
292 }
293
294 static int ogg_build_flac_headers(AVCodecContext *avctx,
295                                   OGGStreamContext *oggstream, int bitexact,
296                                   AVDictionary **m)
297 {
298     uint8_t *p;
299
300     if (avctx->extradata_size < FLAC_STREAMINFO_SIZE)
301         return AVERROR(EINVAL);
302
303     // first packet: STREAMINFO
304     oggstream->header_len[0] = 51;
305     oggstream->header[0] = av_mallocz(51); // per ogg flac specs
306     p = oggstream->header[0];
307     if (!p)
308         return AVERROR(ENOMEM);
309     bytestream_put_byte(&p, 0x7F);
310     bytestream_put_buffer(&p, "FLAC", 4);
311     bytestream_put_byte(&p, 1); // major version
312     bytestream_put_byte(&p, 0); // minor version
313     bytestream_put_be16(&p, 1); // headers packets without this one
314     bytestream_put_buffer(&p, "fLaC", 4);
315     bytestream_put_byte(&p, 0x00); // streaminfo
316     bytestream_put_be24(&p, 34);
317     bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE);
318
319     // second packet: VorbisComment
320     p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
321     if (!p)
322         return AVERROR(ENOMEM);
323     oggstream->header[1] = p;
324     bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
325     bytestream_put_be24(&p, oggstream->header_len[1] - 4);
326
327     return 0;
328 }
329
330 #define SPEEX_HEADER_SIZE 80
331
332 static int ogg_build_speex_headers(AVCodecContext *avctx,
333                                    OGGStreamContext *oggstream, int bitexact,
334                                    AVDictionary **m)
335 {
336     uint8_t *p;
337
338     if (avctx->extradata_size < SPEEX_HEADER_SIZE)
339         return -1;
340
341     // first packet: Speex header
342     p = av_mallocz(SPEEX_HEADER_SIZE);
343     if (!p)
344         return AVERROR(ENOMEM);
345     oggstream->header[0] = p;
346     oggstream->header_len[0] = SPEEX_HEADER_SIZE;
347     bytestream_put_buffer(&p, avctx->extradata, SPEEX_HEADER_SIZE);
348     AV_WL32(&oggstream->header[0][68], 0);  // set extra_headers to 0
349
350     // second packet: VorbisComment
351     p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
352     if (!p)
353         return AVERROR(ENOMEM);
354     oggstream->header[1] = p;
355
356     return 0;
357 }
358
359 #define OPUS_HEADER_SIZE 19
360
361 static int ogg_build_opus_headers(AVCodecContext *avctx,
362                                   OGGStreamContext *oggstream, int bitexact,
363                                   AVDictionary **m)
364 {
365     uint8_t *p;
366
367     if (avctx->extradata_size < OPUS_HEADER_SIZE)
368         return -1;
369
370     /* first packet: Opus header */
371     p = av_mallocz(avctx->extradata_size);
372     if (!p)
373         return AVERROR(ENOMEM);
374     oggstream->header[0] = p;
375     oggstream->header_len[0] = avctx->extradata_size;
376     bytestream_put_buffer(&p, avctx->extradata, avctx->extradata_size);
377
378     /* second packet: VorbisComment */
379     p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
380     if (!p)
381         return AVERROR(ENOMEM);
382     oggstream->header[1] = p;
383     bytestream_put_buffer(&p, "OpusTags", 8);
384
385     return 0;
386 }
387
388 static void ogg_write_pages(AVFormatContext *s, int flush)
389 {
390     OGGContext *ogg = s->priv_data;
391     OGGPageList *next, *p;
392
393     if (!ogg->page_list)
394         return;
395
396     for (p = ogg->page_list; p; ) {
397         OGGStreamContext *oggstream =
398             s->streams[p->page.stream_index]->priv_data;
399         if (oggstream->page_count < 2 && !flush)
400             break;
401         ogg_write_page(s, &p->page,
402                        flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
403         next = p->next;
404         av_freep(&p);
405         p = next;
406     }
407     ogg->page_list = p;
408 }
409
410 static int ogg_write_header(AVFormatContext *s)
411 {
412     OGGContext *ogg = s->priv_data;
413     OGGStreamContext *oggstream;
414     int i, j;
415
416     if (ogg->pref_size)
417         av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
418
419     for (i = 0; i < s->nb_streams; i++) {
420         AVStream *st = s->streams[i];
421         unsigned serial_num = i;
422
423         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
424             if (st->codec->codec_id == AV_CODEC_ID_OPUS)
425                 /* Opus requires a fixed 48kHz clock */
426                 avpriv_set_pts_info(st, 64, 1, 48000);
427             else
428                 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
429
430         if (st->codec->codec_id != AV_CODEC_ID_VORBIS &&
431             st->codec->codec_id != AV_CODEC_ID_THEORA &&
432             st->codec->codec_id != AV_CODEC_ID_SPEEX  &&
433             st->codec->codec_id != AV_CODEC_ID_FLAC   &&
434             st->codec->codec_id != AV_CODEC_ID_OPUS) {
435             av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
436             return -1;
437         }
438
439         if (!st->codec->extradata || !st->codec->extradata_size) {
440             av_log(s, AV_LOG_ERROR, "No extradata present\n");
441             return -1;
442         }
443         oggstream = av_mallocz(sizeof(*oggstream));
444         oggstream->page.stream_index = i;
445
446         if (!(s->flags & AVFMT_FLAG_BITEXACT))
447             do {
448                 serial_num = av_get_random_seed();
449                 for (j = 0; j < i; j++) {
450                     OGGStreamContext *sc = s->streams[j]->priv_data;
451                     if (serial_num == sc->serial_num)
452                         break;
453                 }
454             } while (j < i);
455         oggstream->serial_num = serial_num;
456
457         st->priv_data = oggstream;
458         if (st->codec->codec_id == AV_CODEC_ID_FLAC) {
459             int err = ogg_build_flac_headers(st->codec, oggstream,
460                                              s->flags & AVFMT_FLAG_BITEXACT,
461                                              &s->metadata);
462             if (err) {
463                 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
464                 av_freep(&st->priv_data);
465                 return err;
466             }
467         } else if (st->codec->codec_id == AV_CODEC_ID_SPEEX) {
468             int err = ogg_build_speex_headers(st->codec, oggstream,
469                                               s->flags & AVFMT_FLAG_BITEXACT,
470                                               &s->metadata);
471             if (err) {
472                 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
473                 av_freep(&st->priv_data);
474                 return err;
475             }
476         } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
477             int err = ogg_build_opus_headers(st->codec, oggstream,
478                                              s->flags & AVFMT_FLAG_BITEXACT,
479                                              &s->metadata);
480             if (err) {
481                 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
482                 av_freep(&st->priv_data);
483                 return err;
484             }
485         } else {
486             uint8_t *p;
487             const char *cstr = st->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
488             int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
489             int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
490
491             if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size,
492                                       st->codec->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
493                                       oggstream->header, oggstream->header_len) < 0) {
494                 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
495                 av_freep(&st->priv_data);
496                 return -1;
497             }
498
499             p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
500                                         &oggstream->header_len[1], &s->metadata,
501                                         framing_bit);
502             oggstream->header[1] = p;
503             if (!p)
504                 return AVERROR(ENOMEM);
505
506             bytestream_put_byte(&p, header_type);
507             bytestream_put_buffer(&p, cstr, 6);
508
509             if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
510                 /** KFGSHIFT is the width of the less significant section of the granule position
511                     The less significant section is the frame count since the last keyframe */
512                 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
513                 oggstream->vrev = oggstream->header[0][9];
514                 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
515                        oggstream->kfgshift, oggstream->vrev);
516             }
517         }
518     }
519
520     for (j = 0; j < s->nb_streams; j++) {
521         OGGStreamContext *oggstream = s->streams[j]->priv_data;
522         ogg_buffer_data(s, s->streams[j], oggstream->header[0],
523                         oggstream->header_len[0], 0, 1);
524         oggstream->page.flags |= 2; // bos
525         ogg_buffer_page(s, oggstream);
526     }
527     for (j = 0; j < s->nb_streams; j++) {
528         AVStream *st = s->streams[j];
529         OGGStreamContext *oggstream = st->priv_data;
530         for (i = 1; i < 3; i++) {
531             if (oggstream->header_len[i])
532                 ogg_buffer_data(s, st, oggstream->header[i],
533                                 oggstream->header_len[i], 0, 1);
534         }
535         ogg_buffer_page(s, oggstream);
536     }
537
538     oggstream->page.start_granule = AV_NOPTS_VALUE;
539
540     ogg_write_pages(s, 2);
541
542     return 0;
543 }
544
545 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
546 {
547     AVStream *st = s->streams[pkt->stream_index];
548     OGGStreamContext *oggstream = st->priv_data;
549     int ret;
550     int64_t granule;
551
552     if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
553         int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
554         int pframe_count;
555         if (pkt->flags & AV_PKT_FLAG_KEY)
556             oggstream->last_kf_pts = pts;
557         pframe_count = pts - oggstream->last_kf_pts;
558         // prevent frame count from overflow if key frame flag is not set
559         if (pframe_count >= (1<<oggstream->kfgshift)) {
560             oggstream->last_kf_pts += pframe_count;
561             pframe_count = 0;
562         }
563         granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
564     } else if (st->codec->codec_id == AV_CODEC_ID_OPUS)
565         granule = pkt->pts + pkt->duration +
566                   av_rescale_q(st->codec->initial_padding,
567                                (AVRational){ 1, st->codec->sample_rate },
568                                st->time_base);
569     else
570         granule = pkt->pts + pkt->duration;
571
572     if (oggstream->page.start_granule == AV_NOPTS_VALUE)
573         oggstream->page.start_granule = pkt->pts;
574
575     ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
576     if (ret < 0)
577         return ret;
578
579     ogg_write_pages(s, 0);
580
581     oggstream->last_granule = granule;
582
583     return 0;
584 }
585
586 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
587 {
588     int i;
589
590     if (pkt)
591         return ogg_write_packet_internal(s, pkt);
592
593     for (i = 0; i < s->nb_streams; i++) {
594         OGGStreamContext *oggstream = s->streams[i]->priv_data;
595         if (oggstream->page.segments_count)
596             ogg_buffer_page(s, oggstream);
597     }
598
599     ogg_write_pages(s, 2);
600     return 0;
601 }
602
603 static int ogg_write_trailer(AVFormatContext *s)
604 {
605     int i;
606
607     /* flush current page if needed */
608     for (i = 0; i < s->nb_streams; i++) {
609         OGGStreamContext *oggstream = s->streams[i]->priv_data;
610
611         if (oggstream->page.size > 0)
612             ogg_buffer_page(s, oggstream);
613     }
614
615     ogg_write_pages(s, 1);
616
617     for (i = 0; i < s->nb_streams; i++) {
618         AVStream *st = s->streams[i];
619         OGGStreamContext *oggstream = st->priv_data;
620         if (st->codec->codec_id == AV_CODEC_ID_FLAC ||
621             st->codec->codec_id == AV_CODEC_ID_SPEEX ||
622             st->codec->codec_id == AV_CODEC_ID_OPUS) {
623             av_free(oggstream->header[0]);
624         }
625         av_freep(&oggstream->header[1]);
626         av_freep(&st->priv_data);
627     }
628     return 0;
629 }
630
631 #if CONFIG_OGG_MUXER
632 OGG_CLASS(ogg)
633 AVOutputFormat ff_ogg_muxer = {
634     .name              = "ogg",
635     .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
636     .mime_type         = "application/ogg",
637     .extensions        = "ogg,ogv",
638     .priv_data_size    = sizeof(OGGContext),
639     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
640                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
641     .video_codec       = AV_CODEC_ID_THEORA,
642     .write_header      = ogg_write_header,
643     .write_packet      = ogg_write_packet,
644     .write_trailer     = ogg_write_trailer,
645     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
646     .priv_class        = &ogg_muxer_class,
647 };
648 #endif
649
650 #if CONFIG_OGA_MUXER
651 OGG_CLASS(oga)
652 AVOutputFormat ff_oga_muxer = {
653     .name              = "oga",
654     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Audio"),
655     .mime_type         = "audio/ogg",
656     .extensions        = "oga",
657     .priv_data_size    = sizeof(OGGContext),
658     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
659                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
660     .write_header      = ogg_write_header,
661     .write_packet      = ogg_write_packet,
662     .write_trailer     = ogg_write_trailer,
663     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
664     .priv_class        = &oga_muxer_class,
665 };
666 #endif
667
668 #if CONFIG_SPX_MUXER
669 OGG_CLASS(spx)
670 AVOutputFormat ff_spx_muxer = {
671     .name              = "spx",
672     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Speex"),
673     .mime_type         = "audio/ogg",
674     .extensions        = "spx",
675     .priv_data_size    = sizeof(OGGContext),
676     .audio_codec       = AV_CODEC_ID_SPEEX,
677     .write_header      = ogg_write_header,
678     .write_packet      = ogg_write_packet,
679     .write_trailer     = ogg_write_trailer,
680     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
681     .priv_class        = &spx_muxer_class,
682 };
683 #endif
684
685 #if CONFIG_OPUS_MUXER
686 OGG_CLASS(opus)
687 AVOutputFormat ff_opus_muxer = {
688     .name              = "opus",
689     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Opus"),
690     .mime_type         = "audio/ogg",
691     .extensions        = "opus",
692     .priv_data_size    = sizeof(OGGContext),
693     .audio_codec       = AV_CODEC_ID_OPUS,
694     .write_header      = ogg_write_header,
695     .write_packet      = ogg_write_packet,
696     .write_trailer     = ogg_write_trailer,
697     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
698     .priv_class        = &opus_muxer_class,
699 };
700 #endif