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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
38typedef 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
49typedef 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 /* 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
64} OGGStreamContext;
65
66typedef struct OGGPageList {
67 OGGPage page;
68 struct OGGPageList *next;
69} OGGPageList;
70
71typedef struct OGGContext {
72 const AVClass *class;
73 OGGPageList *page_list;
74 int pref_size; ///< preferred page size (0 => fill all segments)
75 int64_t pref_duration; ///< preferred page duration (0 => fill all segments)
76 int serial_offset;
77} OGGContext;
78
79#define OFFSET(x) offsetof(OGGContext, x)
80#define PARAM AV_OPT_FLAG_ENCODING_PARAM
81
82static 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)\
95static 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
102static 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
111static 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;
122 ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
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
149static 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
155static 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
166static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
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
182static 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
191static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
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
216static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
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,
272 AV_TIME_BASE_Q);
273 int64_t next = av_rescale_q(ogg_granule_to_timestamp(oggstream, page->granule),
274 st->time_base, AV_TIME_BASE_Q);
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
293static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
294 int *header_len, AVDictionary **m, int framing_bit)
295{
296 const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
297 int64_t size;
298 uint8_t *p, *p0;
299
300 ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
301
302 size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
303 if (size > INT_MAX)
304 return NULL;
305 p = av_mallocz(size);
306 if (!p)
307 return NULL;
308 p0 = p;
309
310 p += offset;
311 ff_vorbiscomment_write(&p, m, vendor);
312 if (framing_bit)
313 bytestream_put_byte(&p, 1);
314
315 *header_len = size;
316 return p0;
317}
318
319static int ogg_build_flac_headers(AVCodecParameters *par,
320 OGGStreamContext *oggstream, int bitexact,
321 AVDictionary **m)
322{
323 uint8_t *p;
324
325 if (par->extradata_size < FLAC_STREAMINFO_SIZE)
326 return AVERROR(EINVAL);
327
328 // first packet: STREAMINFO
329 oggstream->header_len[0] = 51;
330 oggstream->header[0] = av_mallocz(51); // per ogg flac specs
331 p = oggstream->header[0];
332 if (!p)
333 return AVERROR(ENOMEM);
334 bytestream_put_byte(&p, 0x7F);
335 bytestream_put_buffer(&p, "FLAC", 4);
336 bytestream_put_byte(&p, 1); // major version
337 bytestream_put_byte(&p, 0); // minor version
338 bytestream_put_be16(&p, 1); // headers packets without this one
339 bytestream_put_buffer(&p, "fLaC", 4);
340 bytestream_put_byte(&p, 0x00); // streaminfo
341 bytestream_put_be24(&p, 34);
342 bytestream_put_buffer(&p, par->extradata, FLAC_STREAMINFO_SIZE);
343
344 // second packet: VorbisComment
345 p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
346 if (!p)
347 return AVERROR(ENOMEM);
348 oggstream->header[1] = p;
349 bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
350 bytestream_put_be24(&p, oggstream->header_len[1] - 4);
351
352 return 0;
353}
354
355#define SPEEX_HEADER_SIZE 80
356
357static int ogg_build_speex_headers(AVCodecParameters *par,
358 OGGStreamContext *oggstream, int bitexact,
359 AVDictionary **m)
360{
361 uint8_t *p;
362
363 if (par->extradata_size < SPEEX_HEADER_SIZE)
364 return AVERROR_INVALIDDATA;
365
366 // first packet: Speex header
367 p = av_mallocz(SPEEX_HEADER_SIZE);
368 if (!p)
369 return AVERROR(ENOMEM);
370 oggstream->header[0] = p;
371 oggstream->header_len[0] = SPEEX_HEADER_SIZE;
372 bytestream_put_buffer(&p, par->extradata, SPEEX_HEADER_SIZE);
373 AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0
374
375 // second packet: VorbisComment
376 p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
377 if (!p)
378 return AVERROR(ENOMEM);
379 oggstream->header[1] = p;
380
381 return 0;
382}
383
384#define OPUS_HEADER_SIZE 19
385
386static int ogg_build_opus_headers(AVCodecParameters *par,
387 OGGStreamContext *oggstream, int bitexact,
388 AVDictionary **m)
389{
390 uint8_t *p;
391
392 if (par->extradata_size < OPUS_HEADER_SIZE)
393 return AVERROR_INVALIDDATA;
394
395 /* first packet: Opus header */
396 p = av_mallocz(par->extradata_size);
397 if (!p)
398 return AVERROR(ENOMEM);
399 oggstream->header[0] = p;
400 oggstream->header_len[0] = par->extradata_size;
401 bytestream_put_buffer(&p, par->extradata, par->extradata_size);
402
403 /* second packet: VorbisComment */
404 p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
405 if (!p)
406 return AVERROR(ENOMEM);
407 oggstream->header[1] = p;
408 bytestream_put_buffer(&p, "OpusTags", 8);
409
410 return 0;
411}
412
413#define VP8_HEADER_SIZE 26
414
415static int ogg_build_vp8_headers(AVFormatContext *s, AVStream *st,
416 OGGStreamContext *oggstream, int bitexact)
417{
418 AVCodecParameters *par = st->codecpar;
419 uint8_t *p;
420
421 /* first packet: VP8 header */
422 p = av_mallocz(VP8_HEADER_SIZE);
423 if (!p)
424 return AVERROR(ENOMEM);
425 oggstream->header[0] = p;
426 oggstream->header_len[0] = VP8_HEADER_SIZE;
427 bytestream_put_byte(&p, 0x4f); // HDRID
428 bytestream_put_buffer(&p, "VP80", 4); // Identifier
429 bytestream_put_byte(&p, 1); // HDRTYP
430 bytestream_put_byte(&p, 1); // VMAJ
431 bytestream_put_byte(&p, 0); // VMIN
432 bytestream_put_be16(&p, par->width);
433 bytestream_put_be16(&p, par->height);
434 bytestream_put_be24(&p, par->sample_aspect_ratio.num);
435 bytestream_put_be24(&p, par->sample_aspect_ratio.den);
436 if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) {
437 // OggVP8 requires pts to increase by 1 per visible frame, so use the least common
438 // multiple framerate if available.
439 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
440 st->time_base.num, st->time_base.den,
441 st->r_frame_rate.den, st->r_frame_rate.num);
442 avpriv_set_pts_info(st, 64, st->r_frame_rate.den, st->r_frame_rate.num);
443 }
444 bytestream_put_be32(&p, st->time_base.den);
445 bytestream_put_be32(&p, st->time_base.num);
446
447 /* optional second packet: VorbisComment */
448 if (av_dict_get(st->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
449 p = ogg_write_vorbiscomment(7, bitexact, &oggstream->header_len[1], &st->metadata, 0);
450 if (!p)
451 return AVERROR(ENOMEM);
452 oggstream->header[1] = p;
453 bytestream_put_byte(&p, 0x4f); // HDRID
454 bytestream_put_buffer(&p, "VP80", 4); // Identifier
455 bytestream_put_byte(&p, 2); // HDRTYP
456 bytestream_put_byte(&p, 0x20);
457 }
458
459 oggstream->isvp8 = 1;
460
461 return 0;
462}
463
464static void ogg_write_pages(AVFormatContext *s, int flush)
465{
466 OGGContext *ogg = s->priv_data;
467 OGGPageList *next, *p;
468
469 if (!ogg->page_list)
470 return;
471
472 for (p = ogg->page_list; p; ) {
473 OGGStreamContext *oggstream =
474 s->streams[p->page.stream_index]->priv_data;
475 if (oggstream->page_count < 2 && !flush)
476 break;
477 ogg_write_page(s, &p->page,
478 flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
479 next = p->next;
480 av_freep(&p);
481 p = next;
482 }
483 ogg->page_list = p;
484}
485
486static int ogg_write_header(AVFormatContext *s)
487{
488 OGGContext *ogg = s->priv_data;
489 OGGStreamContext *oggstream = NULL;
490 int i, j;
491
492 if (ogg->pref_size)
493 av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
494
495 for (i = 0; i < s->nb_streams; i++) {
496 AVStream *st = s->streams[i];
497 unsigned serial_num = i + ogg->serial_offset;
498
499 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
500 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
501 /* Opus requires a fixed 48kHz clock */
502 avpriv_set_pts_info(st, 64, 1, 48000);
503 else
504 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
505 }
506
507 if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
508 st->codecpar->codec_id != AV_CODEC_ID_THEORA &&
509 st->codecpar->codec_id != AV_CODEC_ID_SPEEX &&
510 st->codecpar->codec_id != AV_CODEC_ID_FLAC &&
511 st->codecpar->codec_id != AV_CODEC_ID_OPUS &&
512 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
513 av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
514 return AVERROR(EINVAL);
515 }
516
517 if ((!st->codecpar->extradata || !st->codecpar->extradata_size) &&
518 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
519 av_log(s, AV_LOG_ERROR, "No extradata present\n");
520 return AVERROR_INVALIDDATA;
521 }
522 oggstream = av_mallocz(sizeof(*oggstream));
523 if (!oggstream)
524 return AVERROR(ENOMEM);
525
526 oggstream->page.stream_index = i;
527
528 if (!(s->flags & AVFMT_FLAG_BITEXACT))
529 do {
530 serial_num = av_get_random_seed();
531 for (j = 0; j < i; j++) {
532 OGGStreamContext *sc = s->streams[j]->priv_data;
533 if (serial_num == sc->serial_num)
534 break;
535 }
536 } while (j < i);
537 oggstream->serial_num = serial_num;
538
539 av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
540
541 st->priv_data = oggstream;
542 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
543 int err = ogg_build_flac_headers(st->codecpar, oggstream,
544 s->flags & AVFMT_FLAG_BITEXACT,
545 &st->metadata);
546 if (err) {
547 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
548 av_freep(&st->priv_data);
549 return err;
550 }
551 } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
552 int err = ogg_build_speex_headers(st->codecpar, oggstream,
553 s->flags & AVFMT_FLAG_BITEXACT,
554 &st->metadata);
555 if (err) {
556 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
557 av_freep(&st->priv_data);
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,
562 s->flags & AVFMT_FLAG_BITEXACT,
563 &st->metadata);
564 if (err) {
565 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
566 av_freep(&st->priv_data);
567 return err;
568 }
569 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
570 int err = ogg_build_vp8_headers(s, st, oggstream,
571 s->flags & AVFMT_FLAG_BITEXACT);
572 if (err) {
573 av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n");
574 av_freep(&st->priv_data);
575 return err;
576 }
577 } else {
578 uint8_t *p;
579 const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
580 int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
581 int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
582
583 if (avpriv_split_xiph_headers(st->codecpar->extradata, st->codecpar->extradata_size,
584 st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
585 (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
586 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
587 av_freep(&st->priv_data);
588 return AVERROR_INVALIDDATA;
589 }
590
591 p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
592 &oggstream->header_len[1], &st->metadata,
593 framing_bit);
594 oggstream->header[1] = p;
595 if (!p)
596 return AVERROR(ENOMEM);
597
598 bytestream_put_byte(&p, header_type);
599 bytestream_put_buffer(&p, cstr, 6);
600
601 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
602 int den = AV_RB32(oggstream->header[0] + 22), num = AV_RB32(oggstream->header[0] + 26);
603 /* Make sure to use time base stored in the Theora stream header to write
604 correct timestamps */
605 if (st->time_base.num != num || st->time_base.den != den) {
606 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
607 st->time_base.num, st->time_base.den, num, den);
608 avpriv_set_pts_info(st, 64, num, den);
609 }
610 /** KFGSHIFT is the width of the less significant section of the granule position
611 The less significant section is the frame count since the last keyframe */
612 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
613 oggstream->vrev = oggstream->header[0][9];
614 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
615 oggstream->kfgshift, oggstream->vrev);
616 }
617 }
618 }
619
620 for (j = 0; j < s->nb_streams; j++) {
621 OGGStreamContext *oggstream = s->streams[j]->priv_data;
622 ogg_buffer_data(s, s->streams[j], oggstream->header[0],
623 oggstream->header_len[0], 0, 1);
624 oggstream->page.flags |= 2; // bos
625 ogg_buffer_page(s, oggstream);
626 }
627 for (j = 0; j < s->nb_streams; j++) {
628 AVStream *st = s->streams[j];
629 OGGStreamContext *oggstream = st->priv_data;
630 for (i = 1; i < 3; i++) {
631 if (oggstream->header_len[i])
632 ogg_buffer_data(s, st, oggstream->header[i],
633 oggstream->header_len[i], 0, 1);
634 }
635 ogg_buffer_page(s, oggstream);
636 }
637
638 oggstream->page.start_granule = AV_NOPTS_VALUE;
639
640 ogg_write_pages(s, 2);
641
642 return 0;
643}
644
645static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
646{
647 AVStream *st = s->streams[pkt->stream_index];
648 OGGStreamContext *oggstream = st->priv_data;
649 int ret;
650 int64_t granule;
651
652 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
653 int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
654 int pframe_count;
655 if (pkt->flags & AV_PKT_FLAG_KEY)
656 oggstream->last_kf_pts = pts;
657 pframe_count = pts - oggstream->last_kf_pts;
658 // prevent frame count from overflow if key frame flag is not set
659 if (pframe_count >= (1<<oggstream->kfgshift)) {
660 oggstream->last_kf_pts += pframe_count;
661 pframe_count = 0;
662 }
663 granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
664 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
665 granule = pkt->pts + pkt->duration +
666 av_rescale_q(st->codecpar->initial_padding,
667 (AVRational){ 1, st->codecpar->sample_rate },
668 st->time_base);
669 else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
670 int64_t pts, invcnt, dist;
671 int visible;
672
673 visible = (pkt->data[0] >> 4) & 1;
674 pts = pkt->pts + pkt->duration;
675 invcnt = (oggstream->last_granule >> 30) & 3;
676 invcnt = visible ? 3 : (invcnt == 3 ? 0 : invcnt + 1);
677 dist = (pkt->flags & AV_PKT_FLAG_KEY) ? 0 : ((oggstream->last_granule >> 3) & 0x07ffffff) + 1;
678
679 granule = (pts << 32) | (invcnt << 30) | (dist << 3);
680 } else
681 granule = pkt->pts + pkt->duration;
682
683 if (oggstream->page.start_granule == AV_NOPTS_VALUE)
684 oggstream->page.start_granule = pkt->pts;
685
686 ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
687 if (ret < 0)
688 return ret;
689
690 ogg_write_pages(s, 0);
691
692 oggstream->last_granule = granule;
693
694 return 0;
695}
696
697static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
698{
699 int i;
700
701 if (pkt)
702 return ogg_write_packet_internal(s, pkt);
703
704 for (i = 0; i < s->nb_streams; i++) {
705 OGGStreamContext *oggstream = s->streams[i]->priv_data;
706 if (oggstream->page.segments_count)
707 ogg_buffer_page(s, oggstream);
708 }
709
710 ogg_write_pages(s, 2);
711 return 1;
712}
713
714static int ogg_write_trailer(AVFormatContext *s)
715{
716 int i;
717
718 /* flush current page if needed */
719 for (i = 0; i < s->nb_streams; i++) {
720 OGGStreamContext *oggstream = s->streams[i]->priv_data;
721
722 if (oggstream->page.size > 0)
723 ogg_buffer_page(s, oggstream);
724 }
725
726 ogg_write_pages(s, 1);
727
728 for (i = 0; i < s->nb_streams; i++) {
729 AVStream *st = s->streams[i];
730 OGGStreamContext *oggstream = st->priv_data;
731 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
732 st->codecpar->codec_id == AV_CODEC_ID_SPEEX ||
733 st->codecpar->codec_id == AV_CODEC_ID_OPUS ||
734 st->codecpar->codec_id == AV_CODEC_ID_VP8) {
735 av_freep(&oggstream->header[0]);
736 }
737 av_freep(&oggstream->header[1]);
738 av_freep(&st->priv_data);
739 }
740 return 0;
741}
742
743#if CONFIG_OGG_MUXER
744OGG_CLASS(ogg, Ogg)
745AVOutputFormat ff_ogg_muxer = {
746 .name = "ogg",
747 .long_name = NULL_IF_CONFIG_SMALL("Ogg"),
748 .mime_type = "application/ogg",
749 .extensions = "ogg"
750#if !CONFIG_OGV_MUXER
751 ",ogv"
752#endif
753#if !CONFIG_SPX_MUXER
754 ",spx"
755#endif
756#if !CONFIG_OPUS_MUXER
757 ",opus"
758#endif
759 ,
760 .priv_data_size = sizeof(OGGContext),
761 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
762 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
763 .video_codec = AV_CODEC_ID_THEORA,
764 .write_header = ogg_write_header,
765 .write_packet = ogg_write_packet,
766 .write_trailer = ogg_write_trailer,
767 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
768 .priv_class = &ogg_muxer_class,
769};
770#endif
771
772#if CONFIG_OGA_MUXER
773OGG_CLASS(oga, Ogg audio)
774AVOutputFormat ff_oga_muxer = {
775 .name = "oga",
776 .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"),
777 .mime_type = "audio/ogg",
778 .extensions = "oga",
779 .priv_data_size = sizeof(OGGContext),
780 .audio_codec = AV_CODEC_ID_FLAC,
781 .write_header = ogg_write_header,
782 .write_packet = ogg_write_packet,
783 .write_trailer = ogg_write_trailer,
784 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
785 .priv_class = &oga_muxer_class,
786};
787#endif
788
789#if CONFIG_OGV_MUXER
790OGG_CLASS(ogv, Ogg video)
791AVOutputFormat ff_ogv_muxer = {
792 .name = "ogv",
793 .long_name = NULL_IF_CONFIG_SMALL("Ogg Video"),
794 .mime_type = "video/ogg",
795 .extensions = "ogv",
796 .priv_data_size = sizeof(OGGContext),
797 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
798 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
799 .video_codec = CONFIG_LIBTHEORA_ENCODER ?
800 AV_CODEC_ID_THEORA : AV_CODEC_ID_VP8,
801 .write_header = ogg_write_header,
802 .write_packet = ogg_write_packet,
803 .write_trailer = ogg_write_trailer,
804 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
805 .priv_class = &ogv_muxer_class,
806};
807#endif
808
809#if CONFIG_SPX_MUXER
810OGG_CLASS(spx, Ogg Speex)
811AVOutputFormat ff_spx_muxer = {
812 .name = "spx",
813 .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"),
814 .mime_type = "audio/ogg",
815 .extensions = "spx",
816 .priv_data_size = sizeof(OGGContext),
817 .audio_codec = AV_CODEC_ID_SPEEX,
818 .write_header = ogg_write_header,
819 .write_packet = ogg_write_packet,
820 .write_trailer = ogg_write_trailer,
821 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
822 .priv_class = &spx_muxer_class,
823};
824#endif
825
826#if CONFIG_OPUS_MUXER
827OGG_CLASS(opus, Ogg Opus)
828AVOutputFormat ff_opus_muxer = {
829 .name = "opus",
830 .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"),
831 .mime_type = "audio/ogg",
832 .extensions = "opus",
833 .priv_data_size = sizeof(OGGContext),
834 .audio_codec = AV_CODEC_ID_OPUS,
835 .write_header = ogg_write_header,
836 .write_packet = ogg_write_packet,
837 .write_trailer = ogg_write_trailer,
838 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
839 .priv_class = &opus_muxer_class,
840};
841#endif
842
generated by cgit at 2024-05-17 03:40:07 (GMT)