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 /* 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
66 typedef struct OGGPageList {
67 OGGPage page;
68 struct OGGPageList *next;
69 } OGGPageList;
70
71 typedef 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
82 static 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)\
95 static 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
ogg_write_page(AVFormatContext * s,OGGPage * page,int extra_flags)102 static void ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
103 {
104 OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
105 uint8_t buf[4 + 1 + 1 + 8 + 4 + 4 + 4 + 1 + 255], *ptr = buf, *crc_pos;
106 const AVCRC *crc_table = av_crc_get_table(AV_CRC_32_IEEE);
107 uint32_t crc;
108
109 bytestream_put_le32(&ptr, MKTAG('O', 'g', 'g', 'S'));
110 bytestream_put_byte(&ptr, 0);
111 bytestream_put_byte(&ptr, page->flags | extra_flags);
112 bytestream_put_le64(&ptr, page->granule);
113 bytestream_put_le32(&ptr, oggstream->serial_num);
114 bytestream_put_le32(&ptr, oggstream->page_counter++);
115 crc_pos = ptr;
116 bytestream_put_le32(&ptr, 0);
117 bytestream_put_byte(&ptr, page->segments_count);
118 bytestream_put_buffer(&ptr, page->segments, page->segments_count);
119
120 crc = av_crc(crc_table, 0, buf, ptr - buf);
121 crc = av_crc(crc_table, crc, page->data, page->size);
122 bytestream_put_be32(&crc_pos, crc);
123
124 avio_write(s->pb, buf, ptr - buf);
125 avio_write(s->pb, page->data, page->size);
126 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
127 oggstream->page_count--;
128 }
129
ogg_key_granule(OGGStreamContext * oggstream,int64_t granule)130 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
131 {
132 return (oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1))) ||
133 (oggstream->isvp8 && !((granule >> 3) & 0x07ffffff));
134 }
135
ogg_granule_to_timestamp(OGGStreamContext * oggstream,int64_t granule)136 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
137 {
138 if (oggstream->kfgshift)
139 return (granule>>oggstream->kfgshift) +
140 (granule & ((1<<oggstream->kfgshift)-1));
141 else if (oggstream->isvp8)
142 return granule >> 32;
143 else
144 return granule;
145 }
146
ogg_compare_granule(AVFormatContext * s,OGGPage * next,OGGPage * page)147 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
148 {
149 AVStream *st2 = s->streams[next->stream_index];
150 AVStream *st = s->streams[page->stream_index];
151 int64_t next_granule, cur_granule;
152
153 if (next->granule == -1 || page->granule == -1)
154 return 0;
155
156 next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
157 st2->time_base, AV_TIME_BASE_Q);
158 cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
159 st ->time_base, AV_TIME_BASE_Q);
160 return next_granule > cur_granule;
161 }
162
ogg_reset_cur_page(OGGStreamContext * oggstream)163 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
164 {
165 oggstream->page.granule = -1;
166 oggstream->page.flags = 0;
167 oggstream->page.segments_count = 0;
168 oggstream->page.size = 0;
169 return 0;
170 }
171
ogg_buffer_page(AVFormatContext * s,OGGStreamContext * oggstream)172 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
173 {
174 OGGContext *ogg = s->priv_data;
175 OGGPageList **p = &ogg->page_list;
176 OGGPageList *l = av_mallocz(sizeof(*l));
177
178 if (!l)
179 return AVERROR(ENOMEM);
180 l->page = oggstream->page;
181
182 oggstream->page.start_granule = ogg_granule_to_timestamp(oggstream, oggstream->page.granule);
183 oggstream->page_count++;
184 ogg_reset_cur_page(oggstream);
185
186 while (*p) {
187 if (ogg_compare_granule(s, &(*p)->page, &l->page))
188 break;
189 p = &(*p)->next;
190 }
191 l->next = *p;
192 *p = l;
193
194 return 0;
195 }
196
ogg_buffer_data(AVFormatContext * s,AVStream * st,uint8_t * data,unsigned size,int64_t granule,int header)197 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
198 uint8_t *data, unsigned size, int64_t granule,
199 int header)
200 {
201 OGGStreamContext *oggstream = st->priv_data;
202 OGGContext *ogg = s->priv_data;
203 int total_segments = size / 255 + 1;
204 uint8_t *p = data;
205 int i, segments, len, flush = 0;
206
207 // Handles VFR by flushing page because this frame needs to have a timestamp
208 // For theora and VP8, keyframes also need to have a timestamp to correctly mark
209 // them as such, otherwise seeking will not work correctly at the very
210 // least with old libogg versions.
211 // Do not try to flush header packets though, that will create broken files.
212 if ((st->codecpar->codec_id == AV_CODEC_ID_THEORA || st->codecpar->codec_id == AV_CODEC_ID_VP8) && !header &&
213 (ogg_granule_to_timestamp(oggstream, granule) >
214 ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
215 ogg_key_granule(oggstream, granule))) {
216 if (oggstream->page.granule != -1)
217 ogg_buffer_page(s, oggstream);
218 flush = 1;
219 }
220
221 // avoid a continued page
222 if (!header && oggstream->page.size > 0 &&
223 MAX_PAGE_SIZE - oggstream->page.size < size) {
224 ogg_buffer_page(s, oggstream);
225 }
226
227 for (i = 0; i < total_segments; ) {
228 OGGPage *page = &oggstream->page;
229
230 segments = FFMIN(total_segments - i, 255 - page->segments_count);
231
232 if (i && !page->segments_count)
233 page->flags |= 1; // continued packet
234
235 memset(page->segments+page->segments_count, 255, segments - 1);
236 page->segments_count += segments - 1;
237
238 len = FFMIN(size, segments*255);
239 page->segments[page->segments_count++] = len - (segments-1)*255;
240 memcpy(page->data+page->size, p, len);
241 p += len;
242 size -= len;
243 i += segments;
244 page->size += len;
245
246 if (i == total_segments)
247 page->granule = granule;
248
249 {
250 AVStream *st = s->streams[page->stream_index];
251
252 int64_t start = av_rescale_q(page->start_granule, st->time_base,
253 AV_TIME_BASE_Q);
254 int64_t next = av_rescale_q(ogg_granule_to_timestamp(oggstream, page->granule),
255 st->time_base, AV_TIME_BASE_Q);
256
257 if (page->segments_count == 255) {
258 ogg_buffer_page(s, oggstream);
259 } else if (!header) {
260 if ((ogg->pref_size > 0 && page->size >= ogg->pref_size) ||
261 (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
262 ogg_buffer_page(s, oggstream);
263 }
264 }
265 }
266 }
267
268 if (flush && oggstream->page.granule != -1)
269 ogg_buffer_page(s, oggstream);
270
271 return 0;
272 }
273
ogg_write_vorbiscomment(int64_t offset,int bitexact,int * header_len,AVDictionary ** m,int framing_bit,AVChapter ** chapters,unsigned int nb_chapters)274 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
275 int *header_len, AVDictionary **m, int framing_bit,
276 AVChapter **chapters, unsigned int nb_chapters)
277 {
278 const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
279 AVIOContext pb;
280 int64_t size;
281 uint8_t *p;
282
283 ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
284
285 size = offset + ff_vorbiscomment_length(*m, vendor, chapters, nb_chapters) + framing_bit;
286 if (size > INT_MAX)
287 return NULL;
288 p = av_mallocz(size);
289 if (!p)
290 return NULL;
291
292 ffio_init_context(&pb, p + offset, size - offset, 1, NULL, NULL, NULL, NULL);
293 ff_vorbiscomment_write(&pb, *m, vendor, chapters, nb_chapters);
294 if (framing_bit)
295 avio_w8(&pb, 1);
296
297 *header_len = size;
298 return p;
299 }
300
ogg_build_flac_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m)301 static int ogg_build_flac_headers(AVCodecParameters *par,
302 OGGStreamContext *oggstream, int bitexact,
303 AVDictionary **m)
304 {
305 uint8_t *p;
306
307 if (par->extradata_size < FLAC_STREAMINFO_SIZE)
308 return AVERROR(EINVAL);
309
310 // first packet: STREAMINFO
311 oggstream->header_len[0] = 51;
312 oggstream->header[0] = av_mallocz(51); // per ogg flac specs
313 p = oggstream->header[0];
314 if (!p)
315 return AVERROR(ENOMEM);
316 bytestream_put_byte(&p, 0x7F);
317 bytestream_put_buffer(&p, "FLAC", 4);
318 bytestream_put_byte(&p, 1); // major version
319 bytestream_put_byte(&p, 0); // minor version
320 bytestream_put_be16(&p, 1); // headers packets without this one
321 bytestream_put_buffer(&p, "fLaC", 4);
322 bytestream_put_byte(&p, 0x00); // streaminfo
323 bytestream_put_be24(&p, 34);
324 bytestream_put_buffer(&p, par->extradata, FLAC_STREAMINFO_SIZE);
325
326 // second packet: VorbisComment
327 p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
328 if (!p)
329 return AVERROR(ENOMEM);
330 oggstream->header[1] = p;
331 bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
332 bytestream_put_be24(&p, oggstream->header_len[1] - 4);
333
334 return 0;
335 }
336
337 #define SPEEX_HEADER_SIZE 80
338
ogg_build_speex_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m)339 static int ogg_build_speex_headers(AVCodecParameters *par,
340 OGGStreamContext *oggstream, int bitexact,
341 AVDictionary **m)
342 {
343 uint8_t *p;
344
345 if (par->extradata_size < SPEEX_HEADER_SIZE)
346 return AVERROR_INVALIDDATA;
347
348 // first packet: Speex header
349 p = av_mallocz(SPEEX_HEADER_SIZE);
350 if (!p)
351 return AVERROR(ENOMEM);
352 oggstream->header[0] = p;
353 oggstream->header_len[0] = SPEEX_HEADER_SIZE;
354 bytestream_put_buffer(&p, par->extradata, SPEEX_HEADER_SIZE);
355 AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0
356
357 // second packet: VorbisComment
358 p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0, NULL, 0);
359 if (!p)
360 return AVERROR(ENOMEM);
361 oggstream->header[1] = p;
362
363 return 0;
364 }
365
366 #define OPUS_HEADER_SIZE 19
367
ogg_build_opus_headers(AVCodecParameters * par,OGGStreamContext * oggstream,int bitexact,AVDictionary ** m,AVChapter ** chapters,unsigned int nb_chapters)368 static int ogg_build_opus_headers(AVCodecParameters *par,
369 OGGStreamContext *oggstream, int bitexact,
370 AVDictionary **m, AVChapter **chapters,
371 unsigned int nb_chapters)
372 {
373 uint8_t *p;
374
375 if (par->extradata_size < OPUS_HEADER_SIZE)
376 return AVERROR_INVALIDDATA;
377
378 /* first packet: Opus header */
379 p = av_mallocz(par->extradata_size);
380 if (!p)
381 return AVERROR(ENOMEM);
382 oggstream->header[0] = p;
383 oggstream->header_len[0] = par->extradata_size;
384 bytestream_put_buffer(&p, par->extradata, par->extradata_size);
385
386 /* second packet: VorbisComment */
387 p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0, chapters, nb_chapters);
388 if (!p)
389 return AVERROR(ENOMEM);
390 oggstream->header[1] = p;
391 bytestream_put_buffer(&p, "OpusTags", 8);
392
393 return 0;
394 }
395
396 #define VP8_HEADER_SIZE 26
397
ogg_build_vp8_headers(AVFormatContext * s,AVStream * st,OGGStreamContext * oggstream,int bitexact)398 static int ogg_build_vp8_headers(AVFormatContext *s, AVStream *st,
399 OGGStreamContext *oggstream, int bitexact)
400 {
401 AVCodecParameters *par = st->codecpar;
402 uint8_t *p;
403
404 /* first packet: VP8 header */
405 p = av_mallocz(VP8_HEADER_SIZE);
406 if (!p)
407 return AVERROR(ENOMEM);
408 oggstream->header[0] = p;
409 oggstream->header_len[0] = VP8_HEADER_SIZE;
410 bytestream_put_byte(&p, 0x4f); // HDRID
411 bytestream_put_buffer(&p, "VP80", 4); // Identifier
412 bytestream_put_byte(&p, 1); // HDRTYP
413 bytestream_put_byte(&p, 1); // VMAJ
414 bytestream_put_byte(&p, 0); // VMIN
415 bytestream_put_be16(&p, par->width);
416 bytestream_put_be16(&p, par->height);
417 bytestream_put_be24(&p, par->sample_aspect_ratio.num);
418 bytestream_put_be24(&p, par->sample_aspect_ratio.den);
419 if (st->r_frame_rate.num > 0 && st->r_frame_rate.den > 0) {
420 // OggVP8 requires pts to increase by 1 per visible frame, so use the least common
421 // multiple framerate if available.
422 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
423 st->time_base.num, st->time_base.den,
424 st->r_frame_rate.den, st->r_frame_rate.num);
425 avpriv_set_pts_info(st, 64, st->r_frame_rate.den, st->r_frame_rate.num);
426 }
427 bytestream_put_be32(&p, st->time_base.den);
428 bytestream_put_be32(&p, st->time_base.num);
429
430 /* optional second packet: VorbisComment */
431 if (av_dict_get(st->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
432 p = ogg_write_vorbiscomment(7, bitexact, &oggstream->header_len[1], &st->metadata, 0, NULL, 0);
433 if (!p)
434 return AVERROR(ENOMEM);
435 oggstream->header[1] = p;
436 bytestream_put_byte(&p, 0x4f); // HDRID
437 bytestream_put_buffer(&p, "VP80", 4); // Identifier
438 bytestream_put_byte(&p, 2); // HDRTYP
439 bytestream_put_byte(&p, 0x20);
440 }
441
442 oggstream->isvp8 = 1;
443
444 return 0;
445 }
446
ogg_write_pages(AVFormatContext * s,int flush)447 static void ogg_write_pages(AVFormatContext *s, int flush)
448 {
449 OGGContext *ogg = s->priv_data;
450 OGGPageList *next, *p;
451
452 if (!ogg->page_list)
453 return;
454
455 for (p = ogg->page_list; p; ) {
456 OGGStreamContext *oggstream =
457 s->streams[p->page.stream_index]->priv_data;
458 if (oggstream->page_count < 2 && !flush)
459 break;
460 ogg_write_page(s, &p->page,
461 flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
462 next = p->next;
463 av_freep(&p);
464 p = next;
465 }
466 ogg->page_list = p;
467 }
468
ogg_init(AVFormatContext * s)469 static int ogg_init(AVFormatContext *s)
470 {
471 OGGContext *ogg = s->priv_data;
472 OGGStreamContext *oggstream = NULL;
473 int i, j;
474
475 if (ogg->pref_size)
476 av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
477
478 for (i = 0; i < s->nb_streams; i++) {
479 AVStream *st = s->streams[i];
480 unsigned serial_num = i + ogg->serial_offset;
481
482 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
483 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
484 /* Opus requires a fixed 48kHz clock */
485 avpriv_set_pts_info(st, 64, 1, 48000);
486 else
487 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
488 }
489
490 if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
491 st->codecpar->codec_id != AV_CODEC_ID_THEORA &&
492 st->codecpar->codec_id != AV_CODEC_ID_SPEEX &&
493 st->codecpar->codec_id != AV_CODEC_ID_FLAC &&
494 st->codecpar->codec_id != AV_CODEC_ID_OPUS &&
495 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
496 av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
497 return AVERROR(EINVAL);
498 }
499
500 if ((!st->codecpar->extradata || !st->codecpar->extradata_size) &&
501 st->codecpar->codec_id != AV_CODEC_ID_VP8) {
502 av_log(s, AV_LOG_ERROR, "No extradata present\n");
503 return AVERROR_INVALIDDATA;
504 }
505 oggstream = av_mallocz(sizeof(*oggstream));
506 if (!oggstream)
507 return AVERROR(ENOMEM);
508
509 oggstream->page.stream_index = i;
510
511 if (!(s->flags & AVFMT_FLAG_BITEXACT))
512 do {
513 serial_num = av_get_random_seed();
514 for (j = 0; j < i; j++) {
515 OGGStreamContext *sc = s->streams[j]->priv_data;
516 if (serial_num == sc->serial_num)
517 break;
518 }
519 } while (j < i);
520 oggstream->serial_num = serial_num;
521
522 av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
523
524 st->priv_data = oggstream;
525 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
526 int err = ogg_build_flac_headers(st->codecpar, oggstream,
527 s->flags & AVFMT_FLAG_BITEXACT,
528 &st->metadata);
529 if (err) {
530 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
531 return err;
532 }
533 } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
534 int err = ogg_build_speex_headers(st->codecpar, oggstream,
535 s->flags & AVFMT_FLAG_BITEXACT,
536 &st->metadata);
537 if (err) {
538 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
539 return err;
540 }
541 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
542 int err = ogg_build_opus_headers(st->codecpar, oggstream,
543 s->flags & AVFMT_FLAG_BITEXACT,
544 &st->metadata, s->chapters, s->nb_chapters);
545 if (err) {
546 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
547 return err;
548 }
549 } else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
550 int err = ogg_build_vp8_headers(s, st, oggstream,
551 s->flags & AVFMT_FLAG_BITEXACT);
552 if (err) {
553 av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n");
554 return err;
555 }
556 } else {
557 uint8_t *p;
558 const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
559 int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
560 int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
561
562 if (avpriv_split_xiph_headers(st->codecpar->extradata, st->codecpar->extradata_size,
563 st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
564 (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
565 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
566 oggstream->header[1] = NULL;
567 return AVERROR_INVALIDDATA;
568 }
569
570 p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
571 &oggstream->header_len[1], &st->metadata,
572 framing_bit, NULL, 0);
573 oggstream->header[1] = p;
574 if (!p)
575 return AVERROR(ENOMEM);
576
577 bytestream_put_byte(&p, header_type);
578 bytestream_put_buffer(&p, cstr, 6);
579
580 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
581 int den = AV_RB32(oggstream->header[0] + 22), num = AV_RB32(oggstream->header[0] + 26);
582 /* Make sure to use time base stored in the Theora stream header to write
583 correct timestamps */
584 if (st->time_base.num != num || st->time_base.den != den) {
585 av_log(s, AV_LOG_DEBUG, "Changing time base from %d/%d to %d/%d\n",
586 st->time_base.num, st->time_base.den, num, den);
587 avpriv_set_pts_info(st, 64, num, den);
588 }
589 /** KFGSHIFT is the width of the less significant section of the granule position
590 The less significant section is the frame count since the last keyframe */
591 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
592 oggstream->vrev = oggstream->header[0][9];
593 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
594 oggstream->kfgshift, oggstream->vrev);
595 }
596 }
597 }
598
599 return 0;
600 }
601
ogg_write_header(AVFormatContext * s)602 static int ogg_write_header(AVFormatContext *s)
603 {
604 OGGStreamContext *oggstream = NULL;
605 int i, j;
606
607 for (j = 0; j < s->nb_streams; j++) {
608 oggstream = s->streams[j]->priv_data;
609 ogg_buffer_data(s, s->streams[j], oggstream->header[0],
610 oggstream->header_len[0], 0, 1);
611 oggstream->page.flags |= 2; // bos
612 ogg_buffer_page(s, oggstream);
613 }
614 for (j = 0; j < s->nb_streams; j++) {
615 AVStream *st = s->streams[j];
616 oggstream = st->priv_data;
617 for (i = 1; i < 3; i++) {
618 if (oggstream->header_len[i])
619 ogg_buffer_data(s, st, oggstream->header[i],
620 oggstream->header_len[i], 0, 1);
621 }
622 ogg_buffer_page(s, oggstream);
623 }
624
625 oggstream->page.start_granule = AV_NOPTS_VALUE;
626
627 ogg_write_pages(s, 2);
628
629 return 0;
630 }
631
ogg_write_packet_internal(AVFormatContext * s,AVPacket * pkt)632 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
633 {
634 AVStream *st = s->streams[pkt->stream_index];
635 OGGStreamContext *oggstream = st->priv_data;
636 int ret;
637 int64_t granule;
638
639 if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
640 int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
641 int pframe_count;
642 if (pkt->flags & AV_PKT_FLAG_KEY)
643 oggstream->last_kf_pts = pts;
644 pframe_count = pts - oggstream->last_kf_pts;
645 // prevent frame count from overflow if key frame flag is not set
646 if (pframe_count >= (1<<oggstream->kfgshift)) {
647 oggstream->last_kf_pts += pframe_count;
648 pframe_count = 0;
649 }
650 granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
651 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
652 granule = pkt->pts + pkt->duration +
653 av_rescale_q(st->codecpar->initial_padding,
654 (AVRational){ 1, st->codecpar->sample_rate },
655 st->time_base);
656 else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
657 int64_t pts, invcnt, dist;
658 int visible;
659
660 visible = (pkt->data[0] >> 4) & 1;
661 pts = pkt->pts + pkt->duration;
662 invcnt = (oggstream->last_granule >> 30) & 3;
663 invcnt = visible ? 3 : (invcnt == 3 ? 0 : invcnt + 1);
664 dist = (pkt->flags & AV_PKT_FLAG_KEY) ? 0 : ((oggstream->last_granule >> 3) & 0x07ffffff) + 1;
665
666 granule = (pts << 32) | (invcnt << 30) | (dist << 3);
667 } else
668 granule = pkt->pts + pkt->duration;
669
670 if (oggstream->page.start_granule == AV_NOPTS_VALUE)
671 oggstream->page.start_granule = pkt->pts;
672
673 ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
674 if (ret < 0)
675 return ret;
676
677 ogg_write_pages(s, 0);
678
679 oggstream->last_granule = granule;
680
681 return 0;
682 }
683
ogg_write_packet(AVFormatContext * s,AVPacket * pkt)684 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
685 {
686 int i;
687
688 if (pkt)
689 return ogg_write_packet_internal(s, pkt);
690
691 for (i = 0; i < s->nb_streams; i++) {
692 OGGStreamContext *oggstream = s->streams[i]->priv_data;
693 if (oggstream->page.segments_count)
694 ogg_buffer_page(s, oggstream);
695 }
696
697 ogg_write_pages(s, 2);
698 return 1;
699 }
700
ogg_write_trailer(AVFormatContext * s)701 static int ogg_write_trailer(AVFormatContext *s)
702 {
703 int i;
704
705 /* flush current page if needed */
706 for (i = 0; i < s->nb_streams; i++) {
707 OGGStreamContext *oggstream = s->streams[i]->priv_data;
708
709 if (oggstream->page.size > 0)
710 ogg_buffer_page(s, oggstream);
711 }
712
713 ogg_write_pages(s, 1);
714
715 return 0;
716 }
717
ogg_free(AVFormatContext * s)718 static void ogg_free(AVFormatContext *s)
719 {
720 OGGContext *ogg = s->priv_data;
721 OGGPageList *p = ogg->page_list;
722 int i;
723
724 for (i = 0; i < s->nb_streams; i++) {
725 AVStream *st = s->streams[i];
726 OGGStreamContext *oggstream = st->priv_data;
727 if (!oggstream)
728 continue;
729 if (st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
730 st->codecpar->codec_id == AV_CODEC_ID_SPEEX ||
731 st->codecpar->codec_id == AV_CODEC_ID_OPUS ||
732 st->codecpar->codec_id == AV_CODEC_ID_VP8) {
733 av_freep(&oggstream->header[0]);
734 }
735 av_freep(&oggstream->header[1]);
736 }
737
738 while (p) {
739 OGGPageList *next = p->next;
740 av_free(p);
741 p = next;
742 }
743 ogg->page_list = NULL;
744 }
745
746 #if CONFIG_OGG_MUXER
747 OGG_CLASS(ogg, Ogg)
748 AVOutputFormat ff_ogg_muxer = {
749 .name = "ogg",
750 .long_name = NULL_IF_CONFIG_SMALL("Ogg"),
751 .mime_type = "application/ogg",
752 .extensions = "ogg"
753 #if !CONFIG_OGV_MUXER
754 ",ogv"
755 #endif
756 #if !CONFIG_SPX_MUXER
757 ",spx"
758 #endif
759 #if !CONFIG_OPUS_MUXER
760 ",opus"
761 #endif
762 ,
763 .priv_data_size = sizeof(OGGContext),
764 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
765 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
766 .video_codec = AV_CODEC_ID_THEORA,
767 .init = ogg_init,
768 .write_header = ogg_write_header,
769 .write_packet = ogg_write_packet,
770 .write_trailer = ogg_write_trailer,
771 .deinit = ogg_free,
772 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
773 .priv_class = &ogg_muxer_class,
774 };
775 #endif
776
777 #if CONFIG_OGA_MUXER
778 OGG_CLASS(oga, Ogg audio)
779 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 = &oga_muxer_class,
793 };
794 #endif
795
796 #if CONFIG_OGV_MUXER
797 OGG_CLASS(ogv, Ogg video)
798 AVOutputFormat ff_ogv_muxer = {
799 .name = "ogv",
800 .long_name = NULL_IF_CONFIG_SMALL("Ogg Video"),
801 .mime_type = "video/ogg",
802 .extensions = "ogv",
803 .priv_data_size = sizeof(OGGContext),
804 .audio_codec = CONFIG_LIBVORBIS_ENCODER ?
805 AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
806 .video_codec = CONFIG_LIBTHEORA_ENCODER ?
807 AV_CODEC_ID_THEORA : AV_CODEC_ID_VP8,
808 .init = ogg_init,
809 .write_header = ogg_write_header,
810 .write_packet = ogg_write_packet,
811 .write_trailer = ogg_write_trailer,
812 .deinit = ogg_free,
813 .flags = AVFMT_TS_NEGATIVE | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH,
814 .priv_class = &ogv_muxer_class,
815 };
816 #endif
817
818 #if CONFIG_SPX_MUXER
819 OGG_CLASS(spx, Ogg Speex)
820 AVOutputFormat ff_spx_muxer = {
821 .name = "spx",
822 .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"),
823 .mime_type = "audio/ogg",
824 .extensions = "spx",
825 .priv_data_size = sizeof(OGGContext),
826 .audio_codec = AV_CODEC_ID_SPEEX,
827 .init = ogg_init,
828 .write_header = ogg_write_header,
829 .write_packet = ogg_write_packet,
830 .write_trailer = ogg_write_trailer,
831 .deinit = ogg_free,
832 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
833 .priv_class = &spx_muxer_class,
834 };
835 #endif
836
837 #if CONFIG_OPUS_MUXER
838 OGG_CLASS(opus, Ogg Opus)
839 AVOutputFormat ff_opus_muxer = {
840 .name = "opus",
841 .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"),
842 .mime_type = "audio/ogg",
843 .extensions = "opus",
844 .priv_data_size = sizeof(OGGContext),
845 .audio_codec = AV_CODEC_ID_OPUS,
846 .init = ogg_init,
847 .write_header = ogg_write_header,
848 .write_packet = ogg_write_packet,
849 .write_trailer = ogg_write_trailer,
850 .deinit = ogg_free,
851 .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
852 .priv_class = &opus_muxer_class,
853 };
854 #endif
855