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 "config_components.h"
23
24 #include <stdint.h>
25
26 #include "libavutil/crc.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/random_seed.h"
30 #include "libavcodec/xiph.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/flac.h"
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "internal.h"
36 #include "version.h"
37 #include "vorbiscomment.h"
38
39 #define MAX_PAGE_SIZE 65025
40
41 typedef struct OGGPage {
42 int64_t start_granule;
43 int64_t granule;
44 int stream_index;
45 uint8_t flags;
46 uint8_t segments_count;
47 uint8_t segments[255];
48 uint8_t data[MAX_PAGE_SIZE];
49 uint16_t size;
50 } OGGPage;
51
52 typedef struct OGGStreamContext {
53 unsigned page_counter;
54 uint8_t *header[3];
55 int header_len[3];
56 /** for theora granule */
57 int kfgshift;
58 int64_t last_kf_pts;
59 int vrev;
60 /* for VP8 granule */
61 int isvp8;
62 int eos;
63 unsigned page_count; ///< number of page buffered
64 OGGPage page; ///< current page
65 unsigned serial_num; ///< serial number
66 int64_t last_granule; ///< last packet granule
67 } OGGStreamContext;
68
69 typedef struct OGGPageList {
70 OGGPage page;
71 struct OGGPageList *next;
72 } OGGPageList;
73
74 typedef struct OGGContext {
75 const AVClass *class;
76 OGGPageList *page_list;
77 int pref_size; ///< preferred page size (0 => fill all segments)
78 int64_t pref_duration; ///< preferred page duration (0 => fill all segments)
79 int serial_offset;
80 } OGGContext;
81
82 #define OFFSET(x) offsetof(OGGContext, x)
83 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
84
85 static const AVOption options[] = {
86 { "serial_offset", "serial number offset",
87 OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM },
88 { "oggpagesize", "Set preferred Ogg page size.",
89 OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, PARAM},
90 { "pagesize", "preferred page size in bytes (deprecated)",
91 OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
92 { "page_duration", "preferred page duration, in microseconds",
93 OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
94 { NULL },
95 };
96
97 static const AVClass ogg_muxer_class = {
98 .class_name = "Ogg (audio/video/Speex/Opus) muxer",
99 .item_name = av_default_item_name,
100 .option = options,
101 .version = LIBAVUTIL_VERSION_INT,
102 };
103
ogg_write_page(AVFormatContext * s,OGGPage * page,int extra_flags)104 static void ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
105 {
106 OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
107 uint8_t buf[4 + 1 + 1 + 8 + 4 + 4 + 4 + 1 + 255], *ptr = buf, *crc_pos;
108 const AVCRC *crc_table = av_crc_get_table(AV_CRC_32_IEEE);
109 uint32_t crc;
110
111 bytestream_put_le32(&ptr, MKTAG('O', 'g', 'g', 'S'));
112 bytestream_put_byte(&ptr, 0);
113 bytestream_put_byte(&ptr, page->flags | extra_flags);
114 bytestream_put_le64(&ptr, page->granule);
115 bytestream_put_le32(&ptr, oggstream->serial_num);
116 bytestream_put_le32(&ptr, oggstream->page_counter++);
117 crc_pos = ptr;
118 bytestream_put_le32(&ptr, 0);
119 bytestream_put_byte(&ptr, page->segments_count);
120 bytestream_put_buffer(&ptr, page->segments, page->segments_count);
121
122 crc = av_crc(crc_table, 0, buf, ptr - buf);
123 crc = av_crc(crc_table, crc, page->data, page->size);
124 bytestream_put_be32(&crc_pos, crc);
125
126 avio_write(s->pb, buf, ptr - buf);
127 avio_write(s->pb, page->data, page->size);
128 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
129 oggstream->page_count--;
130 }
131
ogg_key_granule(OGGStreamContext * oggstream,int64_t granule)132 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
133 {
134 return (oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1))) ||
135 (oggstream->isvp8 && !((granule >> 3) & 0x07ffffff));
136 }
137
ogg_granule_to_timestamp(OGGStreamContext * oggstream,int64_t granule)138 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
139 {
140 if (oggstream->kfgshift)
141 return (granule>>oggstream->kfgshift) +
142 (granule & ((1<<oggstream->kfgshift)-1));
143 else if (oggstream->isvp8)
144 return granule >> 32;
145 else
146 return granule;
147 }
148
ogg_compare_granule(AVFormatContext * s,OGGPage * next,OGGPage * page)149 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
150 {
151 AVStream *st2 = s->streams[next->stream_index];
152 AVStream *st = s->streams[page->stream_index];
153 int64_t next_granule, cur_granule;
154
155 if (next->granule == -1 || page->granule == -1)
156 return 0;
157
158 next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
159 st2->time_base, AV_TIME_BASE_Q);
160 cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
161 st ->time_base, AV_TIME_BASE_Q);
162 return next_granule > cur_granule;
163 }
164
ogg_reset_cur_page(OGGStreamContext * oggstream)165 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
166 {
167 oggstream->page.granule = -1;
168 oggstream->page.flags = 0;
169 oggstream->page.segments_count = 0;
170 oggstream->page.size = 0;
171 return 0;
172 }
173
ogg_buffer_page(AVFormatContext * s,OGGStreamContext * oggstream)174 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
175 {
176 OGGContext *ogg = s->priv_data;
177 OGGPageList **p = &ogg->page_list;
178 OGGPageList *l = av_mallocz(sizeof(*l));
179
180 if (!l)
181 return AVERROR(ENOMEM);
182 l->page = oggstream->page;
183
184 oggstream->page.start_granule = ogg_granule_to_timestamp(oggstream, oggstream->page.granule);
185 oggstream->page_count++;
186 ogg_reset_cur_page(oggstream);
187
188 while (*p) {
189 if (ogg_compare_granule(s, &(*p)->page, &l->page))
190 break;
191 p = &(*p)->next;
192 }
193 l->next = *p;
194 *p = l;
195
196 return 0;
197 }
198
ogg_buffer_data(AVFormatContext * s,AVStream * st,const uint8_t * data,unsigned size,int64_t granule,int header)199 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
200 const uint8_t *data, unsigned size, int64_t granule,
201 int header)
202 {
203 OGGStreamContext *oggstream = st->priv_data;
204 OGGContext *ogg = s->priv_data;
205 int total_segments = size / 255 + 1;
206 const uint8_t *p = data;
207 int i, segments, len, flush = 0;
208
209 // Handles VFR by flushing page because this frame needs to have a timestamp
210 // For theora and VP8, keyframes also need to have a timestamp to correctly mark
211 // them as such, otherwise seeking will not work correctly at the very
212 // least with old libogg versions.
213 // Do not try to flush header packets though, that will create broken files.
214 if ((st->codecpar->codec_id == AV_CODEC_ID_THEORA || st->codecpar->codec_id == AV_CODEC_ID_VP8) && !header &&
215 (ogg_granule_to_timestamp(oggstream, granule) >
216 ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
217 ogg_key_granule(oggstream, granule))) {
218 if (oggstream->page.granule != -1)
219 ogg_buffer_page(s, oggstream);
220 flush = 1;
221 }
222
223 // avoid a continued page
224 if (!header && oggstream->page.size > 0 &&
225 MAX_PAGE_SIZE - oggstream->page.size < size) {
226 ogg_buffer_page(s, oggstream);
227 }
228
229 for (i = 0; i < total_segments; ) {
230 OGGPage *page = &oggstream->page;
231
232 segments = FFMIN(total_segments - i, 255 - page->segments_count);
233
234 if (i && !page->segments_count)
235 page->flags |= 1; // continued packet
236
237 memset(page->segments+page->segments_count, 255, segments - 1);
238 page->segments_count += segments - 1;
239
240 len = FFMIN(size, segments*255);
241 page->segments[page->segments_count++] = len - (segments-1)*255;
242 memcpy(page->data+page->size, p, len);
243 p += len;
244 size -= len;
245 i += segments;
246 page->size += len;
247
248 if (i == total_segments)
249 page->granule = granule;
250
251 {
252 AVStream *st = s->streams[page->stream_index];
253
254 int64_t start = av_rescale_q(page->start_granule, st->time_base,
255 AV_TIME_BASE_Q);
256 int64_t next = av_rescale_q(ogg_granule_to_timestamp(oggstream, page->granule),
257 st->time_base, AV_TIME_BASE_Q);
258
259 if (page->segments_count == 255) {
260 ogg_buffer_page(s, oggstream);
261 } else if (!header) {
262 if ((ogg->pref_size > 0 && page->size >= ogg->pref_size) ||
263 (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
264 ogg_buffer_page(s, oggstream);
265 }
266 }
267 }
268 }
269
270 if (flush && oggstream->page.granule != -1)
271 ogg_buffer_page(s, oggstream);
272
273 return 0;
274 }
275
ogg_write_vorbiscomment(int64_t offset,int bitexact,int * header_len,AVDictionary ** m,int framing_bit,AVChapter ** chapters,unsigned int nb_chapters)276 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
277 int *header_len, AVDictionary **m, int framing_bit,
278 AVChapter **chapters, unsigned int nb_chapters)
279 {
280 const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
281 FFIOContext pb;
282 int64_t size;
283 uint8_t *p;
284
285 ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
286
287 size = offset + ff_vorbiscomment_length(*m, vendor, chapters, nb_chapters) + framing_bit;
288 if (size > INT_MAX)
289 return NULL;
290 p = av_mallocz(size);
291 if (!p)
292 return NULL;
293
294 ffio_init_context(&pb, p + offset, size - offset, 1, NULL, NULL, NULL, NULL);
295 ff_vorbiscomment_write(&pb.pub, *m, vendor, chapters, nb_chapters);
296 if (framing_bit)
297 avio_w8(&pb.pub, 1);
298
299 *header_len = size;
300 return p;
301 }
302
ogg_build_flac_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m)303 static int ogg_build_flac_headers(AVCodecParameters *par,
304 OGGStreamContext *oggstream, int bitexact,
305 AVDictionary **m)
306 {
307 uint8_t *p;
308
309 if (par->extradata_size < FLAC_STREAMINFO_SIZE)
310 return AVERROR(EINVAL);
311
312 // first packet: STREAMINFO
313 oggstream->header_len[0] = 51;
314 oggstream->header[0] = av_mallocz(51); // per ogg flac specs
315 p = oggstream->header[0];
316 if (!p)
317 return AVERROR(ENOMEM);
318 bytestream_put_byte(&p, 0x7F);
319 bytestream_put_buffer(&p, "FLAC", 4);
320 bytestream_put_byte(&p, 1); // major version
321 bytestream_put_byte(&p, 0); // minor version
322 bytestream_put_be16(&p, 1); // headers packets without this one
323 bytestream_put_buffer(&p, "fLaC", 4);
324 bytestream_put_byte(&p, 0x00); // streaminfo
325 bytestream_put_be24(&p, 34);
326 bytestream_put_buffer(&p, par->extradata, FLAC_STREAMINFO_SIZE);
327
328 // second packet: VorbisComment
329 p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
330 if (!p)
331 return AVERROR(ENOMEM);
332 oggstream->header[1] = p;
333 bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
334 bytestream_put_be24(&p, oggstream->header_len[1] - 4);
335
336 return 0;
337 }
338
339 #define SPEEX_HEADER_SIZE 80
340
ogg_build_speex_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m)341 static int ogg_build_speex_headers(AVCodecParameters *par,
342 OGGStreamContext *oggstream, int bitexact,
343 AVDictionary **m)
344 {
345 uint8_t *p;
346
347 if (par->extradata_size < SPEEX_HEADER_SIZE)
348 return AVERROR_INVALIDDATA;
349
350 // first packet: Speex header
351 p = av_mallocz(SPEEX_HEADER_SIZE);
352 if (!p)
353 return AVERROR(ENOMEM);
354 oggstream->header[0] = p;
355 oggstream->header_len[0] = SPEEX_HEADER_SIZE;
356 bytestream_put_buffer(&p, par->extradata, SPEEX_HEADER_SIZE);
357 AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0
358
359 // second packet: VorbisComment
360 p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
361 if (!p)
362 return AVERROR(ENOMEM);
363 oggstream->header[1] = p;
364
365 return 0;
366 }
367
368 #define OPUS_HEADER_SIZE 19
369
ogg_build_opus_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m,AVChapter ** chapters,unsigned int nb_chapters)370 static int ogg_build_opus_headers(AVCodecParameters *par,
371 OGGStreamContext *oggstream, int bitexact,
372 AVDictionary **m, AVChapter **chapters,
373 unsigned int nb_chapters)
374 {
375 uint8_t *p;
376
377 if (par->extradata_size < OPUS_HEADER_SIZE)
378 return AVERROR_INVALIDDATA;
379
380 /* first packet: Opus header */
381 p = av_mallocz(par->extradata_size);
382 if (!p)
383 return AVERROR(ENOMEM);
384 oggstream->header[0] = p;
385 oggstream->header_len[0] = par->extradata_size;
386 bytestream_put_buffer(&p, par->extradata, par->extradata_size);
387
388 /* second packet: VorbisComment */
389 p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0, chapters, nb_chapters);
390 if (!p)
391 return AVERROR(ENOMEM);
392 oggstream->header[1] = p;
393 bytestream_put_buffer(&p, "OpusTags", 8);
394
395 return 0;
396 }
397
398 #define VP8_HEADER_SIZE 26
399
ogg_build_vp8_headers(AVFormatContext * s,AVStream * st,OGGStreamContext * oggstream,int bitexact)400 static int ogg_build_vp8_headers(AVFormatContext *s, AVStream *st,
401 OGGStreamContext *oggstream, int bitexact)
402 {
403 AVCodecParameters *par = st->codecpar;
404 uint8_t *p;
405
406 /* first packet: VP8 header */
407 p = av_mallocz(VP8_HEADER_SIZE);
408 if (!p)
409 return AVERROR(ENOMEM);
410 oggstream->header[0] = p;
411 oggstream->header_len[0] = VP8_HEADER_SIZE;
412 bytestream_put_byte(&p, 0x4f); // HDRID
413 bytestream_put_buffer(&p, "VP80", 4); // Identifier
414 bytestream_put_byte(&p, 1); // HDRTYP
415 bytestream_put_byte(&p, 1); // VMAJ
416 bytestream_put_byte(&p, 0); // VMIN
417 bytestream_put_be16(&p, par->width);
418 bytestream_put_be16(&p, par->height);
419 bytestream_put_be24(&p, par->sample_aspect_ratio.num);
420 bytestream_put_be24(&p, par->sample_aspect_ratio.den);
421 if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) {
422 // OggVP8 requires pts to increase by 1 per visible frame, so use the least common
423 // multiple framerate if available.
424 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
425 st->time_base.num, st->time_base.den,
426 st->r_frame_rate.den, st->r_frame_rate.num);
427 avpriv_set_pts_info(st, 64, st->r_frame_rate.den, st->r_frame_rate.num);
428 }
429 bytestream_put_be32(&p, st->time_base.den);
430 bytestream_put_be32(&p, st->time_base.num);
431
432 /* optional second packet: VorbisComment */
433 if (av_dict_get(st->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
434 p = ogg_write_vorbiscomment(7, bitexact, &oggstream->header_len[1], &st->metadata, 0, NULL, 0);
435 if (!p)
436 return AVERROR(ENOMEM);
437 oggstream->header[1] = p;
438 bytestream_put_byte(&p, 0x4f); // HDRID
439 bytestream_put_buffer(&p, "VP80", 4); // Identifier
440 bytestream_put_byte(&p, 2); // HDRTYP
441 bytestream_put_byte(&p, 0x20);
442 }
443
444 oggstream->isvp8 = 1;
445
446 return 0;
447 }
448
ogg_write_pages(AVFormatContext * s,int flush)449 static void ogg_write_pages(AVFormatContext *s, int flush)
450 {
451 OGGContext *ogg = s->priv_data;
452 OGGPageList *next, *p;
453
454 if (!ogg->page_list)
455 return;
456
457 for (p = ogg->page_list; p; ) {
458 OGGStreamContext *oggstream =
459 s->streams[p->page.stream_index]->priv_data;
460 if (oggstream->page_count < 2 && !flush)
461 break;
462 ogg_write_page(s, &p->page,
463 flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
464 next = p->next;
465 av_freep(&p);
466 p = next;
467 }
468 ogg->page_list = p;
469 }
470
ogg_init(AVFormatContext * s)471 static int ogg_init(AVFormatContext *s)
472 {
473 OGGContext *ogg = s->priv_data;
474 OGGStreamContext *oggstream = NULL;
475 int i, j;
476
477 if (ogg->pref_size)
478 av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
479
480 for (i = 0; i < s->nb_streams; i++) {
481 AVStream *st = s->streams[i];
482 unsigned serial_num = i + ogg->serial_offset;
483
484 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
485 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
486 /* Opus requires a fixed 48kHz clock */
487 avpriv_set_pts_info(st, 64, 1, 48000);
488 else
489 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
490 }
491
492 if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
493 st->codecpar->codec_id != AV_CODEC_ID_THEORA &&
494 st->codecpar->codec_id != AV_CODEC_ID_SPEEX &&
495 st->codecpar->codec_id != AV_CODEC_ID_FLAC &&
496 st->codecpar->codec_id != AV_CODEC_ID_OPUS &&
497 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
498 av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
499 return AVERROR(EINVAL);
500 }
501
502 if ((!st->codecpar->extradata || !st->codecpar->extradata_size) &&
503 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
504 av_log(s, AV_LOG_ERROR, "No extradata present\n");
505 return AVERROR_INVALIDDATA;
506 }
507 oggstream = av_mallocz(sizeof(*oggstream));
508 if (!oggstream)
509 return AVERROR(ENOMEM);
510
511 oggstream->page.stream_index = i;
512
513 if (!(s->flags & AVFMT_FLAG_BITEXACT))
514 do {
515 serial_num = av_get_random_seed();
516 for (j = 0; j < i; j++) {
517 OGGStreamContext *sc = s->streams[j]->priv_data;
518 if (serial_num == sc->serial_num)
519 break;
520 }
521 } while (j < i);
522 oggstream->serial_num = serial_num;
523
524 av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
525
526 st->priv_data = oggstream;
527 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
528 int err = ogg_build_flac_headers(st->codecpar, oggstream,
529 s->flags & AVFMT_FLAG_BITEXACT,
530 &st->metadata);
531 if (err) {
532 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
533 return err;
534 }
535 } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
536 int err = ogg_build_speex_headers(st->codecpar, oggstream,
537 s->flags & AVFMT_FLAG_BITEXACT,
538 &st->metadata);
539 if (err) {
540 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
541 return err;
542 }
543 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
544 int err = ogg_build_opus_headers(st->codecpar, oggstream,
545 s->flags & AVFMT_FLAG_BITEXACT,
546 &st->metadata, s->chapters, s->nb_chapters);
547 if (err) {
548 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
549 return err;
550 }
551 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
552 int err = ogg_build_vp8_headers(s, st, oggstream,
553 s->flags & AVFMT_FLAG_BITEXACT);
554 if (err) {
555 av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n");
556 return err;
557 }
558 } else {
559 uint8_t *p;
560 const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
561 int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
562 int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
563
564 if (avpriv_split_xiph_headers(st->codecpar->extradata, st->codecpar->extradata_size,
565 st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
566 (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
567 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
568 oggstream->header[1] = NULL;
569 return AVERROR_INVALIDDATA;
570 }
571
572 p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
573 &oggstream->header_len[1], &st->metadata,
574 framing_bit, NULL, 0);
575 oggstream->header[1] = p;
576 if (!p)
577 return AVERROR(ENOMEM);
578
579 bytestream_put_byte(&p, header_type);
580 bytestream_put_buffer(&p, cstr, 6);
581
582 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
583 int den = AV_RB32(oggstream->header[0] + 22), num = AV_RB32(oggstream->header[0] + 26);
584 /* Make sure to use time base stored in the Theora stream header to write
585 correct timestamps */
586 if (st->time_base.num != num || st->time_base.den != den) {
587 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
588 st->time_base.num, st->time_base.den, num, den);
589 avpriv_set_pts_info(st, 64, num, den);
590 }
591 /** KFGSHIFT is the width of the less significant section of the granule position
592 The less significant section is the frame count since the last keyframe */
593 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
594 oggstream->vrev = oggstream->header[0][9];
595 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
596 oggstream->kfgshift, oggstream->vrev);
597 }
598 }
599 }
600
601 return 0;
602 }
603
ogg_write_header(AVFormatContext * s)604 static int ogg_write_header(AVFormatContext *s)
605 {
606 OGGStreamContext *oggstream = NULL;
607 int i, j;
608
609 for (j = 0; j < s->nb_streams; j++) {
610 oggstream = s->streams[j]->priv_data;
611 ogg_buffer_data(s, s->streams[j], oggstream->header[0],
612 oggstream->header_len[0], 0, 1);
613 oggstream->page.flags |= 2; // bos
614 ogg_buffer_page(s, oggstream);
615 }
616 for (j = 0; j < s->nb_streams; j++) {
617 AVStream *st = s->streams[j];
618 oggstream = st->priv_data;
619 for (i = 1; i < 3; i++) {
620 if (oggstream->header_len[i])
621 ogg_buffer_data(s, st, oggstream->header[i],
622 oggstream->header_len[i], 0, 1);
623 }
624 ogg_buffer_page(s, oggstream);
625 }
626
627 oggstream->page.start_granule = AV_NOPTS_VALUE;
628
629 ogg_write_pages(s, 2);
630
631 return 0;
632 }
633
ogg_write_packet_internal(AVFormatContext * s,AVPacket * pkt)634 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
635 {
636 AVStream *st = s->streams[pkt->stream_index];
637 OGGStreamContext *oggstream = st->priv_data;
638 int ret;
639 int64_t granule;
640
641 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
642 int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
643 int pframe_count;
644 if (pkt->flags & AV_PKT_FLAG_KEY)
645 oggstream->last_kf_pts = pts;
646 pframe_count = pts - oggstream->last_kf_pts;
647 // prevent frame count from overflow if key frame flag is not set
648 if (pframe_count >= (1<<oggstream->kfgshift)) {
649 oggstream->last_kf_pts += pframe_count;
650 pframe_count = 0;
651 }
652 granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
653 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
654 granule = pkt->pts + pkt->duration +
655 av_rescale_q(st->codecpar->initial_padding,
656 (AVRational){ 1, st->codecpar->sample_rate },
657 st->time_base);
658 else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
659 int64_t pts, invcnt, dist;
660 int visible;
661
662 visible = (pkt->data[0] >> 4) & 1;
663 pts = pkt->pts + pkt->duration;
664 invcnt = (oggstream->last_granule >> 30) & 3;
665 invcnt = visible ? 3 : (invcnt == 3 ? 0 : invcnt + 1);
666 dist = (pkt->flags & AV_PKT_FLAG_KEY) ? 0 : ((oggstream->last_granule >> 3) & 0x07ffffff) + 1;
667
668 granule = (pts << 32) | (invcnt << 30) | (dist << 3);
669 } else
670 granule = pkt->pts + pkt->duration;
671
672 if (oggstream->page.start_granule == AV_NOPTS_VALUE)
673 oggstream->page.start_granule = pkt->pts;
674
675 ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
676 if (ret < 0)
677 return ret;
678
679 ogg_write_pages(s, 0);
680
681 oggstream->last_granule = granule;
682
683 return 0;
684 }
685
ogg_write_packet(AVFormatContext * s,AVPacket * pkt)686 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
687 {
688 int i;
689
690 if (pkt)
691 return ogg_write_packet_internal(s, pkt);
692
693 for (i = 0; i < s->nb_streams; i++) {
694 OGGStreamContext *oggstream = s->streams[i]->priv_data;
695 if (oggstream->page.segments_count)
696 ogg_buffer_page(s, oggstream);
697 }
698
699 ogg_write_pages(s, 2);
700 return 1;
701 }
702
ogg_write_trailer(AVFormatContext * s)703 static int ogg_write_trailer(AVFormatContext *s)
704 {
705 int i;
706
707 /* flush current page if needed */
708 for (i = 0; i < s->nb_streams; i++) {
709 OGGStreamContext *oggstream = s->streams[i]->priv_data;
710
711 if (oggstream->page.size > 0)
712 ogg_buffer_page(s, oggstream);
713 }
714
715 ogg_write_pages(s, 1);
716
717 return 0;
718 }
719
ogg_free(AVFormatContext * s)720 static void ogg_free(AVFormatContext *s)
721 {
722 OGGContext *ogg = s->priv_data;
723 OGGPageList *p = ogg->page_list;
724 int i;
725
726 for (i = 0; i < s->nb_streams; i++) {
727 AVStream *st = s->streams[i];
728 OGGStreamContext *oggstream = st->priv_data;
729 if (!oggstream)
730 continue;
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 }
739
740 while (p) {
741 OGGPageList *next = p->next;
742 av_free(p);
743 p = next;
744 }
745 ogg->page_list = NULL;
746 }
747
748 #if CONFIG_OGG_MUXER
749 const AVOutputFormat ff_ogg_muxer = {
750 .name = "ogg",
751 .long_name = NULL_IF_CONFIG_SMALL("Ogg"),
752 .mime_type = "application/ogg",
753 .extensions = "ogg"
754 #if !CONFIG_OGV_MUXER
755 ",ogv"
756 #endif
757 #if !CONFIG_SPX_MUXER
758 ",spx"
759 #endif
760 #if !CONFIG_OPUS_MUXER
761 ",opus"
762 #endif
763 ,
764 .priv_data_size = sizeof(OGGContext),
765 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
766 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
767 .video_codec = AV_CODEC_ID_THEORA,
768 .init = ogg_init,
769 .write_header = ogg_write_header,
770 .write_packet = ogg_write_packet,
771 .write_trailer = ogg_write_trailer,
772 .deinit = ogg_free,
773 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
774 .priv_class = &ogg_muxer_class,
775 };
776 #endif
777
778 #if CONFIG_OGA_MUXER
779 const AVOutputFormat ff_oga_muxer = {
780 .name = "oga",
781 .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"),
782 .mime_type = "audio/ogg",
783 .extensions = "oga",
784 .priv_data_size = sizeof(OGGContext),
785 .audio_codec = AV_CODEC_ID_FLAC,
786 .init = ogg_init,
787 .write_header = ogg_write_header,
788 .write_packet = ogg_write_packet,
789 .write_trailer = ogg_write_trailer,
790 .deinit = ogg_free,
791 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
792 .priv_class = &ogg_muxer_class,
793 };
794 #endif
795
796 #if CONFIG_OGV_MUXER
797 const AVOutputFormat ff_ogv_muxer = {
798 .name = "ogv",
799 .long_name = NULL_IF_CONFIG_SMALL("Ogg Video"),
800 .mime_type = "video/ogg",
801 .extensions = "ogv",
802 .priv_data_size = sizeof(OGGContext),
803 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
804 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
805 .video_codec = CONFIG_LIBTHEORA_ENCODER ?
806 AV_CODEC_ID_THEORA : AV_CODEC_ID_VP8,
807 .init = ogg_init,
808 .write_header = ogg_write_header,
809 .write_packet = ogg_write_packet,
810 .write_trailer = ogg_write_trailer,
811 .deinit = ogg_free,
812 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
813 .priv_class = &ogg_muxer_class,
814 };
815 #endif
816
817 #if CONFIG_SPX_MUXER
818 const AVOutputFormat ff_spx_muxer = {
819 .name = "spx",
820 .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"),
821 .mime_type = "audio/ogg",
822 .extensions = "spx",
823 .priv_data_size = sizeof(OGGContext),
824 .audio_codec = AV_CODEC_ID_SPEEX,
825 .init = ogg_init,
826 .write_header = ogg_write_header,
827 .write_packet = ogg_write_packet,
828 .write_trailer = ogg_write_trailer,
829 .deinit = ogg_free,
830 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
831 .priv_class = &ogg_muxer_class,
832 };
833 #endif
834
835 #if CONFIG_OPUS_MUXER
836 const AVOutputFormat ff_opus_muxer = {
837 .name = "opus",
838 .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"),
839 .mime_type = "audio/ogg",
840 .extensions = "opus",
841 .priv_data_size = sizeof(OGGContext),
842 .audio_codec = AV_CODEC_ID_OPUS,
843 .init = ogg_init,
844 .write_header = ogg_write_header,
845 .write_packet = ogg_write_packet,
846 .write_trailer = ogg_write_trailer,
847 .deinit = ogg_free,
848 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
849 .priv_class = &ogg_muxer_class,
850 };
851 #endif
852