Replace all remaining occurances of step/depth_minus1 and offset_plus1
[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 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;
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 OGGStreamContext {
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 OGGContext {
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     int serial_offset;
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;
120     ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
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
161 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
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
186 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
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
211 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
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->codec->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,
267                                          AV_TIME_BASE_Q);
268             int64_t next  = av_rescale_q(page->granule, st->time_base,
269                                          AV_TIME_BASE_Q);
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
295     ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
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
314 static int ogg_build_flac_headers(AVCodecContext *avctx,
315                                   OGGStreamContext *oggstream, int bitexact,
316                                   AVDictionary **m)
317 {
318     uint8_t *p;
319
320     if (avctx->extradata_size < FLAC_STREAMINFO_SIZE)
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);
337     bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE);
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
352 static int ogg_build_speex_headers(AVCodecContext *avctx,
353                                    OGGStreamContext *oggstream, int bitexact,
354                                    AVDictionary **m)
355 {
356     uint8_t *p;
357
358     if (avctx->extradata_size < SPEEX_HEADER_SIZE)
359         return AVERROR_INVALIDDATA;
360
361     // first packet: Speex header
362     p = av_mallocz(SPEEX_HEADER_SIZE);
363     if (!p)
364         return AVERROR(ENOMEM);
365     oggstream->header[0] = p;
366     oggstream->header_len[0] = SPEEX_HEADER_SIZE;
367     bytestream_put_buffer(&p, avctx->extradata, 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
381 static int ogg_build_opus_headers(AVCodecContext *avctx,
382                                   OGGStreamContext *oggstream, int bitexact,
383                                   AVDictionary **m)
384 {
385     uint8_t *p;
386
387     if (avctx->extradata_size < OPUS_HEADER_SIZE)
388         return AVERROR_INVALIDDATA;
389
390     /* first packet: Opus header */
391     p = av_mallocz(avctx->extradata_size);
392     if (!p)
393         return AVERROR(ENOMEM);
394     oggstream->header[0] = p;
395     oggstream->header_len[0] = avctx->extradata_size;
396     bytestream_put_buffer(&p, avctx->extradata, avctx->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
408 static void ogg_write_pages(AVFormatContext *s, int flush)
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 =
418             s->streams[p->page.stream_index]->priv_data;
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
430 static int ogg_write_header(AVFormatContext *s)
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->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
444             if (st->codec->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->codec->sample_rate);
449         }
450
451         if (st->codec->codec_id != AV_CODEC_ID_VORBIS &&
452             st->codec->codec_id != AV_CODEC_ID_THEORA &&
453             st->codec->codec_id != AV_CODEC_ID_SPEEX  &&
454             st->codec->codec_id != AV_CODEC_ID_FLAC   &&
455             st->codec->codec_id != AV_CODEC_ID_OPUS) {
456             av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
457             return AVERROR(EINVAL);
458         }
459
460         if (!st->codec->extradata || !st->codec->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
481         av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
482
483         st->priv_data = oggstream;
484         if (st->codec->codec_id == AV_CODEC_ID_FLAC) {
485             int err = ogg_build_flac_headers(st->codec, oggstream,
486                                              s->flags & AVFMT_FLAG_BITEXACT,
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->codec->codec_id == AV_CODEC_ID_SPEEX) {
494             int err = ogg_build_speex_headers(st->codec, oggstream,
495                                               s->flags & AVFMT_FLAG_BITEXACT,
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->codec->codec_id == AV_CODEC_ID_OPUS) {
503             int err = ogg_build_opus_headers(st->codec, oggstream,
504                                              s->flags & AVFMT_FLAG_BITEXACT,
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->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
514             int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
515             int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
516
517             if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size,
518                                       st->codec->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
525             p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
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->codec->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
571 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
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->codec->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->codec->codec_id == AV_CODEC_ID_OPUS)
591         granule = pkt->pts + pkt->duration +
592                   av_rescale_q(st->codec->initial_padding,
593                                (AVRational){ 1, st->codec->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
612 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
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
629 static int ogg_write_trailer(AVFormatContext *s)
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->codec->codec_id == AV_CODEC_ID_FLAC ||
647             st->codec->codec_id == AV_CODEC_ID_SPEEX ||
648             st->codec->codec_id == AV_CODEC_ID_OPUS) {
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 ?
673                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
674     .video_codec       = AV_CODEC_ID_THEORA,
675     .write_header      = ogg_write_header,
676     .write_packet      = ogg_write_packet,
677     .write_trailer     = ogg_write_trailer,
678     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
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,
693     .write_header      = ogg_write_header,
694     .write_packet      = ogg_write_packet,
695     .write_trailer     = ogg_write_trailer,
696     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
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,
710     .write_header      = ogg_write_header,
711     .write_packet      = ogg_write_packet,
712     .write_trailer     = ogg_write_trailer,
713     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
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,
727     .write_header      = ogg_write_header,
728     .write_packet      = ogg_write_packet,
729     .write_trailer     = ogg_write_trailer,
730     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
731     .priv_class        = &opus_muxer_class,
732 };
733 #endif