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 OGGPage {
  39     int64_t start_granule;
  40     int64_t granule;
  41     int stream_index;
  42     uint8_t flags;
  43     uint8_t segments_count;
  44     uint8_t segments[255];
  45     uint8_t data[MAX_PAGE_SIZE];
  46     uint16_t size;
  47 } OGGPage;
  48
  49 typedef struct OGGStreamContext {
  50     unsigned page_counter;
  51     uint8_t *header[3];
  52     int header_len[3];
  53     /** for theora granule */
  54     int kfgshift;
  55     int64_t last_kf_pts;
  56     int vrev;
  57     int eos;
  58     unsigned page_count; ///< number of page buffered
  59     OGGPage page; ///< current page
  60     unsigned serial_num; ///< serial number
  61     int64_t last_granule; ///< last packet granule
  62 } OGGStreamContext;
  63
  64 typedef struct OGGPageList {
  65     OGGPage page;
  66     struct OGGPageList *next;
  67 } OGGPageList;
  68
  69 typedef struct OGGContext {
  70     const AVClass *class;
  71     OGGPageList *page_list;
  72     int pref_size; ///< preferred page size (0 => fill all segments)
  73     int64_t pref_duration;      ///< preferred page duration (0 => fill all segments)
  74     int serial_offset;
  75 } OGGContext;
  76
  77 #define OFFSET(x) offsetof(OGGContext, x)
  78 #define PARAM AV_OPT_FLAG_ENCODING_PARAM
  79
  80 static const AVOption options[] = {
  81     { "serial_offset", "serial number offset",
  82         OFFSET(serial_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, PARAM },
  83     { "oggpagesize", "Set preferred Ogg page size.",
  84       OFFSET(pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, PARAM},
  85     { "pagesize", "preferred page size in bytes (deprecated)",
  86         OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM },
  87     { "page_duration", "preferred page duration, in microseconds",
  88         OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM },
  89     { NULL },
  90 };
  91
  92 #define OGG_CLASS(flavor, name)\
  93 static const AVClass flavor ## _muxer_class = {\
  94     .class_name = #name " muxer",\
  95     .item_name  = av_default_item_name,\
  96     .option     = options,\
  97     .version    = LIBAVUTIL_VERSION_INT,\
  98 };
  99
 100 static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset)
 101 {
 102     int64_t pos = avio_tell(pb);
 103     uint32_t checksum = ffio_get_checksum(pb);
 104     avio_seek(pb, crc_offset, SEEK_SET);
 105     avio_wb32(pb, checksum);
 106     avio_seek(pb, pos, SEEK_SET);
 107 }
 108
 109 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
 110 {
 111     OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
 112     AVIOContext *pb;
 113     int64_t crc_offset;
 114     int ret, size;
 115     uint8_t *buf;
 116
 117     ret = avio_open_dyn_buf(&pb);
 118     if (ret < 0)
 119         return ret;
 120     ffio_init_checksum(pb, ff_crc04C11DB7_update, 0);
 121     ffio_wfourcc(pb, "OggS");
 122     avio_w8(pb, 0);
 123     avio_w8(pb, page->flags | extra_flags);
 124     avio_wl64(pb, page->granule);
 125     avio_wl32(pb, oggstream->serial_num);
 126     avio_wl32(pb, oggstream->page_counter++);
 127     crc_offset = avio_tell(pb);
 128     avio_wl32(pb, 0); // crc
 129     avio_w8(pb, page->segments_count);
 130     avio_write(pb, page->segments, page->segments_count);
 131     avio_write(pb, page->data, page->size);
 132
 133     ogg_update_checksum(s, pb, crc_offset);
 134     avio_flush(pb);
 135
 136     size = avio_close_dyn_buf(pb, &buf);
 137     if (size < 0)
 138         return size;
 139
 140     avio_write(s->pb, buf, size);
 141     avio_flush(s->pb);
 142     av_free(buf);
 143     oggstream->page_count--;
 144     return 0;
 145 }
 146
 147 static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule)
 148 {
 149     return oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1));
 150 }
 151
 152 static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule)
 153 {
 154     if (oggstream->kfgshift)
 155         return (granule>>oggstream->kfgshift) +
 156             (granule & ((1<<oggstream->kfgshift)-1));
 157     else
 158         return granule;
 159 }
 160
 161 static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
 162 {
 163     AVStream *st2 = s->streams[next->stream_index];
 164     AVStream *st  = s->streams[page->stream_index];
 165     int64_t next_granule, cur_granule;
 166
 167     if (next->granule == -1 || page->granule == -1)
 168         return 0;
 169
 170     next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule),
 171                                 st2->time_base, AV_TIME_BASE_Q);
 172     cur_granule  = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule),
 173                                 st ->time_base, AV_TIME_BASE_Q);
 174     return next_granule > cur_granule;
 175 }
 176
 177 static int ogg_reset_cur_page(OGGStreamContext *oggstream)
 178 {
 179     oggstream->page.granule = -1;
 180     oggstream->page.flags = 0;
 181     oggstream->page.segments_count = 0;
 182     oggstream->page.size = 0;
 183     return 0;
 184 }
 185
 186 static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
 187 {
 188     OGGContext *ogg = s->priv_data;
 189     OGGPageList **p = &ogg->page_list;
 190     OGGPageList *l = av_mallocz(sizeof(*l));
 191
 192     if (!l)
 193         return AVERROR(ENOMEM);
 194     l->page = oggstream->page;
 195
 196     oggstream->page.start_granule = oggstream->page.granule;
 197     oggstream->page_count++;
 198     ogg_reset_cur_page(oggstream);
 199
 200     while (*p) {
 201         if (ogg_compare_granule(s, &(*p)->page, &l->page))
 202             break;
 203         p = &(*p)->next;
 204     }
 205     l->next = *p;
 206     *p = l;
 207
 208     return 0;
 209 }
 210
 211 static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
 212                            uint8_t *data, unsigned size, int64_t granule,
 213                            int header)
 214 {
 215     OGGStreamContext *oggstream = st->priv_data;
 216     OGGContext *ogg = s->priv_data;
 217     int total_segments = size / 255 + 1;
 218     uint8_t *p = data;
 219     int i, segments, len, flush = 0;
 220
 221     // Handles VFR by flushing page because this frame needs to have a timestamp
 222     // For theora, keyframes also need to have a timestamp to correctly mark
 223     // them as such, otherwise seeking will not work correctly at the very
 224     // least with old libogg versions.
 225     // Do not try to flush header packets though, that will create broken files.
 226     if (st->codec->codec_id == AV_CODEC_ID_THEORA && !header &&
 227         (ogg_granule_to_timestamp(oggstream, granule) >
 228          ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 ||
 229          ogg_key_granule(oggstream, granule))) {
 230         if (oggstream->page.granule != -1)
 231             ogg_buffer_page(s, oggstream);
 232         flush = 1;
 233     }
 234
 235     // avoid a continued page
 236     if (!header && oggstream->page.size > 0 &&
 237         MAX_PAGE_SIZE - oggstream->page.size < size) {
 238         ogg_buffer_page(s, oggstream);
 239     }
 240
 241     for (i = 0; i < total_segments; ) {
 242         OGGPage *page = &oggstream->page;
 243
 244         segments = FFMIN(total_segments - i, 255 - page->segments_count);
 245
 246         if (i && !page->segments_count)
 247             page->flags |= 1; // continued packet
 248
 249         memset(page->segments+page->segments_count, 255, segments - 1);
 250         page->segments_count += segments - 1;
 251
 252         len = FFMIN(size, segments*255);
 253         page->segments[page->segments_count++] = len - (segments-1)*255;
 254         memcpy(page->data+page->size, p, len);
 255         p += len;
 256         size -= len;
 257         i += segments;
 258         page->size += len;
 259
 260         if (i == total_segments)
 261             page->granule = granule;
 262
 263         if (!header) {
 264             AVStream *st = s->streams[page->stream_index];
 265
 266             int64_t start = av_rescale_q(page->start_granule, st->time_base,
 267                                          AV_TIME_BASE_Q);
 268             int64_t next  = av_rescale_q(page->granule, st->time_base,
 269                                          AV_TIME_BASE_Q);
 270
 271             if (page->segments_count == 255 ||
 272                 (ogg->pref_size     > 0 && page->size   >= ogg->pref_size) ||
 273                 (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
 274                 ogg_buffer_page(s, oggstream);
 275             }
 276         }
 277     }
 278
 279     if (flush && oggstream->page.granule != -1)
 280         ogg_buffer_page(s, oggstream);
 281
 282     return 0;
 283 }
 284
 285 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
 286                                         int *header_len, AVDictionary **m, int framing_bit)
 287 {
 288     const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
 289     int64_t size;
 290     uint8_t *p, *p0;
 291
 292     ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
 293
 294     size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
 295     if (size > INT_MAX)
 296         return NULL;
 297     p = av_mallocz(size);
 298     if (!p)
 299         return NULL;
 300     p0 = p;
 301
 302     p += offset;
 303     ff_vorbiscomment_write(&p, m, vendor);
 304     if (framing_bit)
 305         bytestream_put_byte(&p, 1);
 306
 307     *header_len = size;
 308     return p0;
 309 }
 310
 311 static int ogg_build_flac_headers(AVCodecContext *avctx,
 312                                   OGGStreamContext *oggstream, int bitexact,
 313                                   AVDictionary **m)
 314 {
 315     uint8_t *p;
 316
 317     if (avctx->extradata_size < FLAC_STREAMINFO_SIZE)
 318         return AVERROR(EINVAL);
 319
 320     // first packet: STREAMINFO
 321     oggstream->header_len[0] = 51;
 322     oggstream->header[0] = av_mallocz(51); // per ogg flac specs
 323     p = oggstream->header[0];
 324     if (!p)
 325         return AVERROR(ENOMEM);
 326     bytestream_put_byte(&p, 0x7F);
 327     bytestream_put_buffer(&p, "FLAC", 4);
 328     bytestream_put_byte(&p, 1); // major version
 329     bytestream_put_byte(&p, 0); // minor version
 330     bytestream_put_be16(&p, 1); // headers packets without this one
 331     bytestream_put_buffer(&p, "fLaC", 4);
 332     bytestream_put_byte(&p, 0x00); // streaminfo
 333     bytestream_put_be24(&p, 34);
 334     bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE);
 335
 336     // second packet: VorbisComment
 337     p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
 338     if (!p)
 339         return AVERROR(ENOMEM);
 340     oggstream->header[1] = p;
 341     bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
 342     bytestream_put_be24(&p, oggstream->header_len[1] - 4);
 343
 344     return 0;
 345 }
 346
 347 #define SPEEX_HEADER_SIZE 80
 348
 349 static int ogg_build_speex_headers(AVCodecContext *avctx,
 350                                    OGGStreamContext *oggstream, int bitexact,
 351                                    AVDictionary **m)
 352 {
 353     uint8_t *p;
 354
 355     if (avctx->extradata_size < SPEEX_HEADER_SIZE)
 356         return AVERROR_INVALIDDATA;
 357
 358     // first packet: Speex header
 359     p = av_mallocz(SPEEX_HEADER_SIZE);
 360     if (!p)
 361         return AVERROR(ENOMEM);
 362     oggstream->header[0] = p;
 363     oggstream->header_len[0] = SPEEX_HEADER_SIZE;
 364     bytestream_put_buffer(&p, avctx->extradata, SPEEX_HEADER_SIZE);
 365     AV_WL32(&oggstream->header[0][68], 0);  // set extra_headers to 0
 366
 367     // second packet: VorbisComment
 368     p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
 369     if (!p)
 370         return AVERROR(ENOMEM);
 371     oggstream->header[1] = p;
 372
 373     return 0;
 374 }
 375
 376 #define OPUS_HEADER_SIZE 19
 377
 378 static int ogg_build_opus_headers(AVCodecContext *avctx,
 379                                   OGGStreamContext *oggstream, int bitexact,
 380                                   AVDictionary **m)
 381 {
 382     uint8_t *p;
 383
 384     if (avctx->extradata_size < OPUS_HEADER_SIZE)
 385         return AVERROR_INVALIDDATA;
 386
 387     /* first packet: Opus header */
 388     p = av_mallocz(avctx->extradata_size);
 389     if (!p)
 390         return AVERROR(ENOMEM);
 391     oggstream->header[0] = p;
 392     oggstream->header_len[0] = avctx->extradata_size;
 393     bytestream_put_buffer(&p, avctx->extradata, avctx->extradata_size);
 394
 395     /* second packet: VorbisComment */
 396     p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
 397     if (!p)
 398         return AVERROR(ENOMEM);
 399     oggstream->header[1] = p;
 400     bytestream_put_buffer(&p, "OpusTags", 8);
 401
 402     return 0;
 403 }
 404
 405 static void ogg_write_pages(AVFormatContext *s, int flush)
 406 {
 407     OGGContext *ogg = s->priv_data;
 408     OGGPageList *next, *p;
 409
 410     if (!ogg->page_list)
 411         return;
 412
 413     for (p = ogg->page_list; p; ) {
 414         OGGStreamContext *oggstream =
 415             s->streams[p->page.stream_index]->priv_data;
 416         if (oggstream->page_count < 2 && !flush)
 417             break;
 418         ogg_write_page(s, &p->page,
 419                        flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
 420         next = p->next;
 421         av_freep(&p);
 422         p = next;
 423     }
 424     ogg->page_list = p;
 425 }
 426
 427 static int ogg_write_header(AVFormatContext *s)
 428 {
 429     OGGContext *ogg = s->priv_data;
 430     OGGStreamContext *oggstream = NULL;
 431     int i, j;
 432
 433     if (ogg->pref_size)
 434         av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
 435
 436     for (i = 0; i < s->nb_streams; i++) {
 437         AVStream *st = s->streams[i];
 438         unsigned serial_num = i + ogg->serial_offset;
 439
 440         if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
 441             if (st->codec->codec_id == AV_CODEC_ID_OPUS)
 442                 /* Opus requires a fixed 48kHz clock */
 443                 avpriv_set_pts_info(st, 64, 1, 48000);
 444             else
 445                 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
 446         }
 447
 448         if (st->codec->codec_id != AV_CODEC_ID_VORBIS &&
 449             st->codec->codec_id != AV_CODEC_ID_THEORA &&
 450             st->codec->codec_id != AV_CODEC_ID_SPEEX  &&
 451             st->codec->codec_id != AV_CODEC_ID_FLAC   &&
 452             st->codec->codec_id != AV_CODEC_ID_OPUS) {
 453             av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
 454             return AVERROR(EINVAL);
 455         }
 456
 457         if (!st->codec->extradata || !st->codec->extradata_size) {
 458             av_log(s, AV_LOG_ERROR, "No extradata present\n");
 459             return AVERROR_INVALIDDATA;
 460         }
 461         oggstream = av_mallocz(sizeof(*oggstream));
 462         if (!oggstream)
 463             return AVERROR(ENOMEM);
 464
 465         oggstream->page.stream_index = i;
 466
 467         if (!(s->flags & AVFMT_FLAG_BITEXACT))
 468             do {
 469                 serial_num = av_get_random_seed();
 470                 for (j = 0; j < i; j++) {
 471                     OGGStreamContext *sc = s->streams[j]->priv_data;
 472                     if (serial_num == sc->serial_num)
 473                         break;
 474                 }
 475             } while (j < i);
 476         oggstream->serial_num = serial_num;
 477
 478         av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
 479
 480         st->priv_data = oggstream;
 481         if (st->codec->codec_id == AV_CODEC_ID_FLAC) {
 482             int err = ogg_build_flac_headers(st->codec, oggstream,
 483                                              s->flags & AVFMT_FLAG_BITEXACT,
 484                                              &st->metadata);
 485             if (err) {
 486                 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
 487                 av_freep(&st->priv_data);
 488                 return err;
 489             }
 490         } else if (st->codec->codec_id == AV_CODEC_ID_SPEEX) {
 491             int err = ogg_build_speex_headers(st->codec, oggstream,
 492                                               s->flags & AVFMT_FLAG_BITEXACT,
 493                                               &st->metadata);
 494             if (err) {
 495                 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
 496                 av_freep(&st->priv_data);
 497                 return err;
 498             }
 499         } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
 500             int err = ogg_build_opus_headers(st->codec, oggstream,
 501                                              s->flags & AVFMT_FLAG_BITEXACT,
 502                                              &st->metadata);
 503             if (err) {
 504                 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
 505                 av_freep(&st->priv_data);
 506                 return err;
 507             }
 508         } else {
 509             uint8_t *p;
 510             const char *cstr = st->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
 511             int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
 512             int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
 513
 514             if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size,
 515                                       st->codec->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
 516                                       (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
 517                 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
 518                 av_freep(&st->priv_data);
 519                 return AVERROR_INVALIDDATA;
 520             }
 521
 522             p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
 523                                         &oggstream->header_len[1], &st->metadata,
 524                                         framing_bit);
 525             oggstream->header[1] = p;
 526             if (!p)
 527                 return AVERROR(ENOMEM);
 528
 529             bytestream_put_byte(&p, header_type);
 530             bytestream_put_buffer(&p, cstr, 6);
 531
 532             if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
 533                 /** KFGSHIFT is the width of the less significant section of the granule position
 534                     The less significant section is the frame count since the last keyframe */
 535                 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
 536                 oggstream->vrev = oggstream->header[0][9];
 537                 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
 538                        oggstream->kfgshift, oggstream->vrev);
 539             }
 540         }
 541     }
 542
 543     for (j = 0; j < s->nb_streams; j++) {
 544         OGGStreamContext *oggstream = s->streams[j]->priv_data;
 545         ogg_buffer_data(s, s->streams[j], oggstream->header[0],
 546                         oggstream->header_len[0], 0, 1);
 547         oggstream->page.flags |= 2; // bos
 548         ogg_buffer_page(s, oggstream);
 549     }
 550     for (j = 0; j < s->nb_streams; j++) {
 551         AVStream *st = s->streams[j];
 552         OGGStreamContext *oggstream = st->priv_data;
 553         for (i = 1; i < 3; i++) {
 554             if (oggstream->header_len[i])
 555                 ogg_buffer_data(s, st, oggstream->header[i],
 556                                 oggstream->header_len[i], 0, 1);
 557         }
 558         ogg_buffer_page(s, oggstream);
 559     }
 560
 561     oggstream->page.start_granule = AV_NOPTS_VALUE;
 562
 563     ogg_write_pages(s, 2);
 564
 565     return 0;
 566 }
 567
 568 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 569 {
 570     AVStream *st = s->streams[pkt->stream_index];
 571     OGGStreamContext *oggstream = st->priv_data;
 572     int ret;
 573     int64_t granule;
 574
 575     if (st->codec->codec_id == AV_CODEC_ID_THEORA) {
 576         int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
 577         int pframe_count;
 578         if (pkt->flags & AV_PKT_FLAG_KEY)
 579             oggstream->last_kf_pts = pts;
 580         pframe_count = pts - oggstream->last_kf_pts;
 581         // prevent frame count from overflow if key frame flag is not set
 582         if (pframe_count >= (1<<oggstream->kfgshift)) {
 583             oggstream->last_kf_pts += pframe_count;
 584             pframe_count = 0;
 585         }
 586         granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
 587     } else if (st->codec->codec_id == AV_CODEC_ID_OPUS)
 588         granule = pkt->pts + pkt->duration +
 589                   av_rescale_q(st->codec->initial_padding,
 590                                (AVRational){ 1, st->codec->sample_rate },
 591                                st->time_base);
 592     else
 593         granule = pkt->pts + pkt->duration;
 594
 595     if (oggstream->page.start_granule == AV_NOPTS_VALUE)
 596         oggstream->page.start_granule = pkt->pts;
 597
 598     ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
 599     if (ret < 0)
 600         return ret;
 601
 602     ogg_write_pages(s, 0);
 603
 604     oggstream->last_granule = granule;
 605
 606     return 0;
 607 }
 608
 609 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
 610 {
 611     int i;
 612
 613     if (pkt)
 614         return ogg_write_packet_internal(s, pkt);
 615
 616     for (i = 0; i < s->nb_streams; i++) {
 617         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 618         if (oggstream->page.segments_count)
 619             ogg_buffer_page(s, oggstream);
 620     }
 621
 622     ogg_write_pages(s, 2);
 623     return 1;
 624 }
 625
 626 static int ogg_write_trailer(AVFormatContext *s)
 627 {
 628     int i;
 629
 630     /* flush current page if needed */
 631     for (i = 0; i < s->nb_streams; i++) {
 632         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 633
 634         if (oggstream->page.size > 0)
 635             ogg_buffer_page(s, oggstream);
 636     }
 637
 638     ogg_write_pages(s, 1);
 639
 640     for (i = 0; i < s->nb_streams; i++) {
 641         AVStream *st = s->streams[i];
 642         OGGStreamContext *oggstream = st->priv_data;
 643         if (st->codec->codec_id == AV_CODEC_ID_FLAC ||
 644             st->codec->codec_id == AV_CODEC_ID_SPEEX ||
 645             st->codec->codec_id == AV_CODEC_ID_OPUS) {
 646             av_freep(&oggstream->header[0]);
 647         }
 648         av_freep(&oggstream->header[1]);
 649         av_freep(&st->priv_data);
 650     }
 651     return 0;
 652 }
 653
 654 #if CONFIG_OGG_MUXER
 655 OGG_CLASS(ogg, Ogg)
 656 AVOutputFormat ff_ogg_muxer = {
 657     .name              = "ogg",
 658     .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
 659     .mime_type         = "application/ogg",
 660     .extensions        = "ogg,ogv"
 661 #if !CONFIG_SPX_MUXER
 662                          ",spx"
 663 #endif
 664 #if !CONFIG_OPUS_MUXER
 665                          ",opus"
 666 #endif
 667                          ,
 668     .priv_data_size    = sizeof(OGGContext),
 669     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 670                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 671     .video_codec       = AV_CODEC_ID_THEORA,
 672     .write_header      = ogg_write_header,
 673     .write_packet      = ogg_write_packet,
 674     .write_trailer     = ogg_write_trailer,
 675     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 676     .priv_class        = &ogg_muxer_class,
 677 };
 678 #endif
 679
 680 #if CONFIG_OGA_MUXER
 681 OGG_CLASS(oga, Ogg audio)
 682 AVOutputFormat ff_oga_muxer = {
 683     .name              = "oga",
 684     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Audio"),
 685     .mime_type         = "audio/ogg",
 686     .extensions        = "oga",
 687     .priv_data_size    = sizeof(OGGContext),
 688     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 689                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 690     .write_header      = ogg_write_header,
 691     .write_packet      = ogg_write_packet,
 692     .write_trailer     = ogg_write_trailer,
 693     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 694     .priv_class        = &oga_muxer_class,
 695 };
 696 #endif
 697
 698 #if CONFIG_SPX_MUXER
 699 OGG_CLASS(spx, Ogg Speex)
 700 AVOutputFormat ff_spx_muxer = {
 701     .name              = "spx",
 702     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Speex"),
 703     .mime_type         = "audio/ogg",
 704     .extensions        = "spx",
 705     .priv_data_size    = sizeof(OGGContext),
 706     .audio_codec       = AV_CODEC_ID_SPEEX,
 707     .write_header      = ogg_write_header,
 708     .write_packet      = ogg_write_packet,
 709     .write_trailer     = ogg_write_trailer,
 710     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 711     .priv_class        = &spx_muxer_class,
 712 };
 713 #endif
 714
 715 #if CONFIG_OPUS_MUXER
 716 OGG_CLASS(opus, Ogg Opus)
 717 AVOutputFormat ff_opus_muxer = {
 718     .name              = "opus",
 719     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Opus"),
 720     .mime_type         = "audio/ogg",
 721     .extensions        = "opus",
 722     .priv_data_size    = sizeof(OGGContext),
 723     .audio_codec       = AV_CODEC_ID_OPUS,
 724     .write_header      = ogg_write_header,
 725     .write_packet      = ogg_write_packet,
 726     .write_trailer     = ogg_write_trailer,
 727     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 728     .priv_class        = &opus_muxer_class,
 729 };
 730 #endif