git.sesse.net Git - ffmpeg/blob - 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 {
  39     int64_t start_granule;
  40     int64_t granule;
  41     int stream_index;
  42     uint8_t flags;
  43     uint8_t segments_count;
  44     uint8_t segments[255];
  45     uint8_t data[MAX_PAGE_SIZE];
  46     uint16_t size;
  47 } OGGPage;
  48
  49 typedef struct {
  50     unsigned page_counter;
  51     uint8_t *header[3];
  52     int header_len[3];
  53     /** for theora granule */
  54     int kfgshift;
  55     int64_t last_kf_pts;
  56     int vrev;
  57     int eos;
  58     unsigned page_count; ///< number of page buffered
  59     OGGPage page; ///< current page
  60     unsigned serial_num; ///< serial number
  61     int64_t last_granule; ///< last packet granule
  62 } OGGStreamContext;
  63
  64 typedef struct OGGPageList {
  65     OGGPage page;
  66     struct OGGPageList *next;
  67 } OGGPageList;
  68
  69 typedef struct {
  70     const AVClass *class;
  71     OGGPageList *page_list;
  72     int pref_size; ///< preferred page size (0 => fill all segments)
  73     int64_t pref_duration;      ///< preferred page duration (0 => fill all segments)
  74 } OGGContext;
  75
  76 #define OFFSET(x) offsetof(OGGContext, x)
  77 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
  78
  79 static const AVOption options[] = {
  80     { "oggpagesize", "Set preferred Ogg page size.",
  81       offsetof(OGGContext, pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_PARAM},
  82     { "pagesize", "preferred page size in bytes (deprecated)",
  83         OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
  84     { "page_duration", "preferred page duration, in microseconds",
  85         OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
  86     { NULL },
  87 };
  88
  89 #define OGG_CLASS(flavor, name)\
  90 static const AVClass flavor ## _muxer_class = {\
  91     .class_name = #name " muxer",\
  92     .item_name  = av_default_item_name,\
  93     .option     = options,\
  94     .version    = LIBAVUTIL_VERSION_INT,\
  95 };
  96
  97 static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
  98 {
  99     int64_t pos = avio_tell(pb);
 100     uint32_t checksum = ffio_get_checksum(pb);
 101     avio_seek(pb, crc_offset, SEEK_SET);
 102     avio_wb32(pb, checksum);
 103     avio_seek(pb, pos, SEEK_SET);
 104 }
 105
 106 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
 107 {
 108     OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
 109     AVIOContext *pb;
 110     int64_t crc_offset;
 111     int ret, size;
 112     uint8_t *buf;
 113
 114     ret = avio_open_dyn_buf(&pb);
 115     if (ret < 0)
 116         return ret;
 117     ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
 118     ffio_wfourcc(pb, "OggS");
 119     avio_w8(pb, 0);
 120     avio_w8(pb, page->flags | extra_flags);
 121     avio_wl64(pb, page->granule);
 122     avio_wl32(pb, oggstream->serial_num);
 123     avio_wl32(pb, oggstream->page_counter++);
 124     crc_offset = avio_tell(pb);
 125     avio_wl32(pb, 0); // crc
 126     avio_w8(pb, page->segments_count);
 127     avio_write(pb, page->segments, page->segments_count);
 128     avio_write(pb, page->data, page->size);
 129
 130     ogg_update_checksum(s, pb, crc_offset);
 131     avio_flush(pb);
 132
 133     size = avio_close_dyn_buf(pb, &buf);
 134     if (size < 0)
 135         return size;
 136
 137     avio_write(s->pb, buf, size);
 138     avio_flush(s->pb);
 139     av_free(buf);
 140     oggstream->page_count--;
 141     return 0;
 142 }
 143
 144 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
 145 {
 146     return oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1));
 147 }
 148
 149 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
 150 {
 151     if (oggstream->kfgshift)
 152         return (granule>>oggstream->kfgshift) +
 153             (granule & ((1<<oggstream->kfgshift)-1));
 154     else
 155         return granule;
 156 }
 157
 158 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
 159 {
 160     AVStream *st2 = s->streams[next->stream_index];
 161     AVStream *st  = s->streams[page->stream_index];
 162     int64_t next_granule, cur_granule;
 163
 164     if (next->granule == -1 || page->granule == -1)
 165         return 0;
 166
 167     next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
 168                                 st2->time_base, AV_TIME_BASE_Q);
 169     cur_granule  = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
 170                                 st ->time_base, AV_TIME_BASE_Q);
 171     return next_granule > cur_granule;
 172 }
 173
 174 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
 175 {
 176     oggstream->page.granule = -1;
 177     oggstream->page.flags = 0;
 178     oggstream->page.segments_count = 0;
 179     oggstream->page.size = 0;
 180     return 0;
 181 }
 182
 183 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
 184 {
 185     OGGContext *ogg = s->priv_data;
 186     OGGPageList **p = &ogg->page_list;
 187     OGGPageList *l = av_mallocz(sizeof(*l));
 188
 189     if (!l)
 190         return AVERROR(ENOMEM);
 191     l->page = oggstream->page;
 192
 193     oggstream->page.start_granule = oggstream->page.granule;
 194     oggstream->page_count++;
 195     ogg_reset_cur_page(oggstream);
 196
 197     while (*p) {
 198         if (ogg_compare_granule(s, &(*p)->page, &l->page))
 199             break;
 200         p = &(*p)->next;
 201     }
 202     l->next = *p;
 203     *p = l;
 204
 205     return 0;
 206 }
 207
 208 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
 209                            uint8_t *data, unsigned size, int64_t granule,
 210                            int header)
 211 {
 212     OGGStreamContext *oggstream = st->priv_data;
 213     OGGContext *ogg = s->priv_data;
 214     int total_segments = size / 255 + 1;
 215     uint8_t *p = data;
 216     int i, segments, len, flush = 0;
 217
 218     // Handles VFR by flushing page because this frame needs to have a timestamp
 219     // For theora, keyframes also need to have a timestamp to correctly mark
 220     // them as such, otherwise seeking will not work correctly at the very
 221     // least with old libogg versions.
 222     // Do not try to flush header packets though, that will create broken files.
 223     if (st->codec->codec_id == AV_CODEC_ID_THEORA && !header &&
 224         (ogg_granule_to_timestamp(oggstream, granule) >
 225          ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
 226          ogg_key_granule(oggstream, granule))) {
 227         if (oggstream->page.granule != -1)
 228             ogg_buffer_page(s, oggstream);
 229         flush = 1;
 230     }
 231
 232     // avoid a continued page
 233     if (!header && oggstream->page.size > 0 &&
 234         MAX_PAGE_SIZE - oggstream->page.size < size) {
 235         ogg_buffer_page(s, oggstream);
 236     }
 237
 238     for (i = 0; i < total_segments; ) {
 239         OGGPage *page = &oggstream->page;
 240
 241         segments = FFMIN(total_segments - i, 255 - page->segments_count);
 242
 243         if (i && !page->segments_count)
 244             page->flags |= 1; // continued packet
 245
 246         memset(page->segments+page->segments_count, 255, segments - 1);
 247         page->segments_count += segments - 1;
 248
 249         len = FFMIN(size, segments*255);
 250         page->segments[page->segments_count++] = len - (segments-1)*255;
 251         memcpy(page->data+page->size, p, len);
 252         p += len;
 253         size -= len;
 254         i += segments;
 255         page->size += len;
 256
 257         if (i == total_segments)
 258             page->granule = granule;
 259
 260         if (!header) {
 261             AVStream *st = s->streams[page->stream_index];
 262
 263             int64_t start = av_rescale_q(page->start_granule, st->time_base,
 264                                          AV_TIME_BASE_Q);
 265             int64_t next  = av_rescale_q(page->granule, st->time_base,
 266                                          AV_TIME_BASE_Q);
 267
 268             if (page->segments_count == 255 ||
 269                 (ogg->pref_size     > 0 && page->size   >= ogg->pref_size) ||
 270                 (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
 271                 ogg_buffer_page(s, oggstream);
 272             }
 273         }
 274     }
 275
 276     if (flush && oggstream->page.granule != -1)
 277         ogg_buffer_page(s, oggstream);
 278
 279     return 0;
 280 }
 281
 282 static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact,
 283                                         int *header_len, AVDictionary **m, int framing_bit)
 284 {
 285     const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
 286     int size;
 287     uint8_t *p, *p0;
 288
 289     ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
 290
 291     size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
 292     p = av_mallocz(size);
 293     if (!p)
 294         return NULL;
 295     p0 = p;
 296
 297     p += offset;
 298     ff_vorbiscomment_write(&p, m, vendor);
 299     if (framing_bit)
 300         bytestream_put_byte(&p, 1);
 301
 302     *header_len = size;
 303     return p0;
 304 }
 305
 306 static int ogg_build_flac_headers(AVCodecContext *avctx,
 307                                   OGGStreamContext *oggstream, int bitexact,
 308                                   AVDictionary **m)
 309 {
 310     uint8_t *p;
 311
 312     if (avctx->extradata_size < FLAC_STREAMINFO_SIZE)
 313         return AVERROR(EINVAL);
 314
 315     // first packet: STREAMINFO
 316     oggstream->header_len[0] = 51;
 317     oggstream->header[0] = av_mallocz(51); // per ogg flac specs
 318     p = oggstream->header[0];
 319     if (!p)
 320         return AVERROR(ENOMEM);
 321     bytestream_put_byte(&p, 0x7F);
 322     bytestream_put_buffer(&p, "FLAC", 4);
 323     bytestream_put_byte(&p, 1); // major version
 324     bytestream_put_byte(&p, 0); // minor version
 325     bytestream_put_be16(&p, 1); // headers packets without this one
 326     bytestream_put_buffer(&p, "fLaC", 4);
 327     bytestream_put_byte(&p, 0x00); // streaminfo
 328     bytestream_put_be24(&p, 34);
 329     bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE);
 330
 331     // second packet: VorbisComment
 332     p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
 333     if (!p)
 334         return AVERROR(ENOMEM);
 335     oggstream->header[1] = p;
 336     bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
 337     bytestream_put_be24(&p, oggstream->header_len[1] - 4);
 338
 339     return 0;
 340 }
 341
 342 #define SPEEX_HEADER_SIZE 80
 343
 344 static int ogg_build_speex_headers(AVCodecContext *avctx,
 345                                    OGGStreamContext *oggstream, int bitexact,
 346                                    AVDictionary **m)
 347 {
 348     uint8_t *p;
 349
 350     if (avctx->extradata_size < SPEEX_HEADER_SIZE)
 351         return AVERROR_INVALIDDATA;
 352
 353     // first packet: Speex header
 354     p = av_mallocz(SPEEX_HEADER_SIZE);
 355     if (!p)
 356         return AVERROR(ENOMEM);
 357     oggstream->header[0] = p;
 358     oggstream->header_len[0] = SPEEX_HEADER_SIZE;
 359     bytestream_put_buffer(&p, avctx->extradata, SPEEX_HEADER_SIZE);
 360     AV_WL32(&oggstream->header[0][68], 0);  // set extra_headers to 0
 361
 362     // second packet: VorbisComment
 363     p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
 364     if (!p)
 365         return AVERROR(ENOMEM);
 366     oggstream->header[1] = p;
 367
 368     return 0;
 369 }
 370
 371 #define OPUS_HEADER_SIZE 19
 372
 373 static int ogg_build_opus_headers(AVCodecContext *avctx,
 374                                   OGGStreamContext *oggstream, int bitexact,
 375                                   AVDictionary **m)
 376 {
 377     uint8_t *p;
 378
 379     if (avctx->extradata_size < OPUS_HEADER_SIZE)
 380         return AVERROR_INVALIDDATA;
 381
 382     /* first packet: Opus header */
 383     p = av_mallocz(avctx->extradata_size);
 384     if (!p)
 385         return AVERROR(ENOMEM);
 386     oggstream->header[0] = p;
 387     oggstream->header_len[0] = avctx->extradata_size;
 388     bytestream_put_buffer(&p, avctx->extradata, avctx->extradata_size);
 389
 390     /* second packet: VorbisComment */
 391     p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
 392     if (!p)
 393         return AVERROR(ENOMEM);
 394     oggstream->header[1] = p;
 395     bytestream_put_buffer(&p, "OpusTags", 8);
 396
 397     return 0;
 398 }
 399
 400 static void ogg_write_pages(AVFormatContext *s, int flush)
 401 {
 402     OGGContext *ogg = s->priv_data;
 403     OGGPageList *next, *p;
 404
 405     if (!ogg->page_list)
 406         return;
 407
 408     for (p = ogg->page_list; p; ) {
 409         OGGStreamContext *oggstream =
 410             s->streams[p->page.stream_index]->priv_data;
 411         if (oggstream->page_count < 2 && !flush)
 412             break;
 413         ogg_write_page(s, &p->page,
 414                        flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
 415         next = p->next;
 416         av_freep(&p);
 417         p = next;
 418     }
 419     ogg->page_list = p;
 420 }
 421
 422 static int ogg_write_header(AVFormatContext *s)
 423 {
 424     OGGContext *ogg = s->priv_data;
 425     OGGStreamContext *oggstream = NULL;
 426     int i, j;
 427
 428     if (ogg->pref_size)
 429         av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
 430
 431     for (i = 0; i < s->nb_streams; i++) {
 432         AVStream *st = s->streams[i];
 433         unsigned serial_num = i;
 434
 435         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
 436             if (st->codec->codec_id == AV_CODEC_ID_OPUS)
 437                 /* Opus requires a fixed 48kHz clock */
 438                 avpriv_set_pts_info(st, 64, 1, 48000);
 439             else
 440                 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
 441         }
 442
 443         if (st->codec->codec_id != AV_CODEC_ID_VORBIS &&
 444             st->codec->codec_id != AV_CODEC_ID_THEORA &&
 445             st->codec->codec_id != AV_CODEC_ID_SPEEX  &&
 446             st->codec->codec_id != AV_CODEC_ID_FLAC   &&
 447             st->codec->codec_id != AV_CODEC_ID_OPUS) {
 448             av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
 449             return AVERROR(EINVAL);
 450         }
 451
 452         if (!st->codec->extradata || !st->codec->extradata_size) {
 453             av_log(s, AV_LOG_ERROR, "No extradata present\n");
 454             return AVERROR_INVALIDDATA;
 455         }
 456         oggstream = av_mallocz(sizeof(*oggstream));
 457         if (!oggstream)
 458             return AVERROR(ENOMEM);
 459
 460         oggstream->page.stream_index = i;
 461
 462         if (!(s->flags & AVFMT_FLAG_BITEXACT))
 463             do {
 464                 serial_num = av_get_random_seed();
 465                 for (j = 0; j < i; j++) {
 466                     OGGStreamContext *sc = s->streams[j]->priv_data;
 467                     if (serial_num == sc->serial_num)
 468                         break;
 469                 }
 470             } while (j < i);
 471         oggstream->serial_num = serial_num;
 472
 473         av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
 474
 475         st->priv_data = oggstream;
 476         if (st->codec->codec_id == AV_CODEC_ID_FLAC) {
 477             int err = ogg_build_flac_headers(st->codec, oggstream,
 478                                              s->flags & AVFMT_FLAG_BITEXACT,
 479                                              &st->metadata);
 480             if (err) {
 481                 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
 482                 av_freep(&st->priv_data);
 483                 return err;
 484             }
 485         } else if (st->codec->codec_id == AV_CODEC_ID_SPEEX) {
 486             int err = ogg_build_speex_headers(st->codec, oggstream,
 487                                               s->flags & AVFMT_FLAG_BITEXACT,
 488                                               &st->metadata);
 489             if (err) {
 490                 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
 491                 av_freep(&st->priv_data);
 492                 return err;
 493             }
 494         } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
 495             int err = ogg_build_opus_headers(st->codec, oggstream,
 496                                              s->flags & AVFMT_FLAG_BITEXACT,
 497                                              &st->metadata);
 498             if (err) {
 499                 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
 500                 av_freep(&st->priv_data);
 501                 return err;
 502             }
 503         } else {
 504             uint8_t *p;
 505             const char *cstr = st->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
 506             int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
 507             int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
 508
 509             if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size,
 510                                       st->codec->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
 511                                       (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
 512                 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
 513                 av_freep(&st->priv_data);
 514                 return AVERROR_INVALIDDATA;
 515             }
 516
 517             p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
 518                                         &oggstream->header_len[1], &st->metadata,
 519                                         framing_bit);
 520             oggstream->header[1] = p;
 521             if (!p)
 522                 return AVERROR(ENOMEM);
 523
 524             bytestream_put_byte(&p, header_type);
 525             bytestream_put_buffer(&p, cstr, 6);
 526
 527             if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
 528                 /** KFGSHIFT is the width of the less significant section of the granule position
 529                     The less significant section is the frame count since the last keyframe */
 530                 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
 531                 oggstream->vrev = oggstream->header[0][9];
 532                 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
 533                        oggstream->kfgshift, oggstream->vrev);
 534             }
 535         }
 536     }
 537
 538     for (j = 0; j < s->nb_streams; j++) {
 539         OGGStreamContext *oggstream = s->streams[j]->priv_data;
 540         ogg_buffer_data(s, s->streams[j], oggstream->header[0],
 541                         oggstream->header_len[0], 0, 1);
 542         oggstream->page.flags |= 2; // bos
 543         ogg_buffer_page(s, oggstream);
 544     }
 545     for (j = 0; j < s->nb_streams; j++) {
 546         AVStream *st = s->streams[j];
 547         OGGStreamContext *oggstream = st->priv_data;
 548         for (i = 1; i < 3; i++) {
 549             if (oggstream->header_len[i])
 550                 ogg_buffer_data(s, st, oggstream->header[i],
 551                                 oggstream->header_len[i], 0, 1);
 552         }
 553         ogg_buffer_page(s, oggstream);
 554     }
 555
 556     oggstream->page.start_granule = AV_NOPTS_VALUE;
 557
 558     ogg_write_pages(s, 2);
 559
 560     return 0;
 561 }
 562
 563 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 564 {
 565     AVStream *st = s->streams[pkt->stream_index];
 566     OGGStreamContext *oggstream = st->priv_data;
 567     int ret;
 568     int64_t granule;
 569
 570     if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
 571         int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
 572         int pframe_count;
 573         if (pkt->flags & AV_PKT_FLAG_KEY)
 574             oggstream->last_kf_pts = pts;
 575         pframe_count = pts - oggstream->last_kf_pts;
 576         // prevent frame count from overflow if key frame flag is not set
 577         if (pframe_count >= (1<<oggstream->kfgshift)) {
 578             oggstream->last_kf_pts += pframe_count;
 579             pframe_count = 0;
 580         }
 581         granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
 582     } else if (st->codec->codec_id == AV_CODEC_ID_OPUS)
 583         granule = pkt->pts + pkt->duration +
 584                   av_rescale_q(st->codec->initial_padding,
 585                                (AVRational){ 1, st->codec->sample_rate },
 586                                st->time_base);
 587     else
 588         granule = pkt->pts + pkt->duration;
 589
 590     if (oggstream->page.start_granule == AV_NOPTS_VALUE)
 591         oggstream->page.start_granule = pkt->pts;
 592
 593     ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
 594     if (ret < 0)
 595         return ret;
 596
 597     ogg_write_pages(s, 0);
 598
 599     oggstream->last_granule = granule;
 600
 601     return 0;
 602 }
 603
 604 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
 605 {
 606     int i;
 607
 608     if (pkt)
 609         return ogg_write_packet_internal(s, pkt);
 610
 611     for (i = 0; i < s->nb_streams; i++) {
 612         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 613         if (oggstream->page.segments_count)
 614             ogg_buffer_page(s, oggstream);
 615     }
 616
 617     ogg_write_pages(s, 2);
 618     return 0;
 619 }
 620
 621 static int ogg_write_trailer(AVFormatContext *s)
 622 {
 623     int i;
 624
 625     /* flush current page if needed */
 626     for (i = 0; i < s->nb_streams; i++) {
 627         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 628
 629         if (oggstream->page.size > 0)
 630             ogg_buffer_page(s, oggstream);
 631     }
 632
 633     ogg_write_pages(s, 1);
 634
 635     for (i = 0; i < s->nb_streams; i++) {
 636         AVStream *st = s->streams[i];
 637         OGGStreamContext *oggstream = st->priv_data;
 638         if (st->codec->codec_id == AV_CODEC_ID_FLAC ||
 639             st->codec->codec_id == AV_CODEC_ID_SPEEX ||
 640             st->codec->codec_id == AV_CODEC_ID_OPUS) {
 641             av_freep(&oggstream->header[0]);
 642         }
 643         av_freep(&oggstream->header[1]);
 644         av_freep(&st->priv_data);
 645     }
 646     return 0;
 647 }
 648
 649 #if CONFIG_OGG_MUXER
 650 OGG_CLASS(ogg, Ogg)
 651 AVOutputFormat ff_ogg_muxer = {
 652     .name              = "ogg",
 653     .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
 654     .mime_type         = "application/ogg",
 655     .extensions        = "ogg,ogv"
 656 #if !CONFIG_SPX_MUXER
 657                          ",spx"
 658 #endif
 659 #if !CONFIG_OPUS_MUXER
 660                          ",opus"
 661 #endif
 662                          ,
 663     .priv_data_size    = sizeof(OGGContext),
 664     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 665                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 666     .video_codec       = AV_CODEC_ID_THEORA,
 667     .write_header      = ogg_write_header,
 668     .write_packet      = ogg_write_packet,
 669     .write_trailer     = ogg_write_trailer,
 670     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 671     .priv_class        = &ogg_muxer_class,
 672 };
 673 #endif
 674
 675 #if CONFIG_OGA_MUXER
 676 OGG_CLASS(oga, Ogg audio)
 677 AVOutputFormat ff_oga_muxer = {
 678     .name              = "oga",
 679     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Audio"),
 680     .mime_type         = "audio/ogg",
 681     .extensions        = "oga",
 682     .priv_data_size    = sizeof(OGGContext),
 683     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 684                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 685     .write_header      = ogg_write_header,
 686     .write_packet      = ogg_write_packet,
 687     .write_trailer     = ogg_write_trailer,
 688     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 689     .priv_class        = &oga_muxer_class,
 690 };
 691 #endif
 692
 693 #if CONFIG_SPX_MUXER
 694 OGG_CLASS(spx, Ogg Speex)
 695 AVOutputFormat ff_spx_muxer = {
 696     .name              = "spx",
 697     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Speex"),
 698     .mime_type         = "audio/ogg",
 699     .extensions        = "spx",
 700     .priv_data_size    = sizeof(OGGContext),
 701     .audio_codec       = AV_CODEC_ID_SPEEX,
 702     .write_header      = ogg_write_header,
 703     .write_packet      = ogg_write_packet,
 704     .write_trailer     = ogg_write_trailer,
 705     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 706     .priv_class        = &spx_muxer_class,
 707 };
 708 #endif
 709
 710 #if CONFIG_OPUS_MUXER
 711 OGG_CLASS(opus, Ogg Opus)
 712 AVOutputFormat ff_opus_muxer = {
 713     .name              = "opus",
 714     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Opus"),
 715     .mime_type         = "audio/ogg",
 716     .extensions        = "opus",
 717     .priv_data_size    = sizeof(OGGContext),
 718     .audio_codec       = AV_CODEC_ID_OPUS,
 719     .write_header      = ogg_write_header,
 720     .write_packet      = ogg_write_packet,
 721     .write_trailer     = ogg_write_trailer,
 722     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 723     .priv_class        = &opus_muxer_class,
 724 };
 725 #endif