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->codecpar->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         {
 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_buffer_page(s, oggstream);
 273             } else if (!header) {
 274                 if ((ogg->pref_size     > 0 && page->size   >= ogg->pref_size) ||
 275                     (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) {
 276                     ogg_buffer_page(s, oggstream);
 277                 }
 278             }
 279         }
 280     }
 281
 282     if (flush && oggstream->page.granule != -1)
 283         ogg_buffer_page(s, oggstream);
 284
 285     return 0;
 286 }
 287
 288 static uint8_t *ogg_write_vorbiscomment(int64_t offset, int bitexact,
 289                                         int *header_len, AVDictionary **m, int framing_bit)
 290 {
 291     const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT;
 292     int64_t size;
 293     uint8_t *p, *p0;
 294
 295     ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL);
 296
 297     size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit;
 298     if (size > INT_MAX)
 299         return NULL;
 300     p = av_mallocz(size);
 301     if (!p)
 302         return NULL;
 303     p0 = p;
 304
 305     p += offset;
 306     ff_vorbiscomment_write(&p, m, vendor);
 307     if (framing_bit)
 308         bytestream_put_byte(&p, 1);
 309
 310     *header_len = size;
 311     return p0;
 312 }
 313
 314 static int ogg_build_flac_headers(AVCodecParameters *par,
 315                                   OGGStreamContext *oggstream, int bitexact,
 316                                   AVDictionary **m)
 317 {
 318     uint8_t *p;
 319
 320     if (par->extradata_size < FLAC_STREAMINFO_SIZE)
 321         return AVERROR(EINVAL);
 322
 323     // first packet: STREAMINFO
 324     oggstream->header_len[0] = 51;
 325     oggstream->header[0] = av_mallocz(51); // per ogg flac specs
 326     p = oggstream->header[0];
 327     if (!p)
 328         return AVERROR(ENOMEM);
 329     bytestream_put_byte(&p, 0x7F);
 330     bytestream_put_buffer(&p, "FLAC", 4);
 331     bytestream_put_byte(&p, 1); // major version
 332     bytestream_put_byte(&p, 0); // minor version
 333     bytestream_put_be16(&p, 1); // headers packets without this one
 334     bytestream_put_buffer(&p, "fLaC", 4);
 335     bytestream_put_byte(&p, 0x00); // streaminfo
 336     bytestream_put_be24(&p, 34);
 337     bytestream_put_buffer(&p, par->extradata, FLAC_STREAMINFO_SIZE);
 338
 339     // second packet: VorbisComment
 340     p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0);
 341     if (!p)
 342         return AVERROR(ENOMEM);
 343     oggstream->header[1] = p;
 344     bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment
 345     bytestream_put_be24(&p, oggstream->header_len[1] - 4);
 346
 347     return 0;
 348 }
 349
 350 #define SPEEX_HEADER_SIZE 80
 351
 352 static int ogg_build_speex_headers(AVCodecParameters *par,
 353                                    OGGStreamContext *oggstream, int bitexact,
 354                                    AVDictionary **m)
 355 {
 356     uint8_t *p;
 357
 358     if (par->extradata_size < SPEEX_HEADER_SIZE)
 359         return AVERROR_INVALIDDATA;
 360
 361     // first packet: Speex header
 362     p = av_mallocz(SPEEX_HEADER_SIZE);
 363     if (!p)
 364         return AVERROR(ENOMEM);
 365     oggstream->header[0] = p;
 366     oggstream->header_len[0] = SPEEX_HEADER_SIZE;
 367     bytestream_put_buffer(&p, par->extradata, SPEEX_HEADER_SIZE);
 368     AV_WL32(&oggstream->header[0][68], 0);  // set extra_headers to 0
 369
 370     // second packet: VorbisComment
 371     p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0);
 372     if (!p)
 373         return AVERROR(ENOMEM);
 374     oggstream->header[1] = p;
 375
 376     return 0;
 377 }
 378
 379 #define OPUS_HEADER_SIZE 19
 380
 381 static int ogg_build_opus_headers(AVCodecParameters *par,
 382                                   OGGStreamContext *oggstream, int bitexact,
 383                                   AVDictionary **m)
 384 {
 385     uint8_t *p;
 386
 387     if (par->extradata_size < OPUS_HEADER_SIZE)
 388         return AVERROR_INVALIDDATA;
 389
 390     /* first packet: Opus header */
 391     p = av_mallocz(par->extradata_size);
 392     if (!p)
 393         return AVERROR(ENOMEM);
 394     oggstream->header[0] = p;
 395     oggstream->header_len[0] = par->extradata_size;
 396     bytestream_put_buffer(&p, par->extradata, par->extradata_size);
 397
 398     /* second packet: VorbisComment */
 399     p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0);
 400     if (!p)
 401         return AVERROR(ENOMEM);
 402     oggstream->header[1] = p;
 403     bytestream_put_buffer(&p, "OpusTags", 8);
 404
 405     return 0;
 406 }
 407
 408 static void ogg_write_pages(AVFormatContext *s, int flush)
 409 {
 410     OGGContext *ogg = s->priv_data;
 411     OGGPageList *next, *p;
 412
 413     if (!ogg->page_list)
 414         return;
 415
 416     for (p = ogg->page_list; p; ) {
 417         OGGStreamContext *oggstream =
 418             s->streams[p->page.stream_index]->priv_data;
 419         if (oggstream->page_count < 2 && !flush)
 420             break;
 421         ogg_write_page(s, &p->page,
 422                        flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
 423         next = p->next;
 424         av_freep(&p);
 425         p = next;
 426     }
 427     ogg->page_list = p;
 428 }
 429
 430 static int ogg_write_header(AVFormatContext *s)
 431 {
 432     OGGContext *ogg = s->priv_data;
 433     OGGStreamContext *oggstream = NULL;
 434     int i, j;
 435
 436     if (ogg->pref_size)
 437         av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n");
 438
 439     for (i = 0; i < s->nb_streams; i++) {
 440         AVStream *st = s->streams[i];
 441         unsigned serial_num = i + ogg->serial_offset;
 442
 443         if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
 444             if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
 445                 /* Opus requires a fixed 48kHz clock */
 446                 avpriv_set_pts_info(st, 64, 1, 48000);
 447             else
 448                 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
 449         }
 450
 451         if (st->codecpar->codec_id != AV_CODEC_ID_VORBIS &&
 452             st->codecpar->codec_id != AV_CODEC_ID_THEORA &&
 453             st->codecpar->codec_id != AV_CODEC_ID_SPEEX  &&
 454             st->codecpar->codec_id != AV_CODEC_ID_FLAC   &&
 455             st->codecpar->codec_id != AV_CODEC_ID_OPUS) {
 456             av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i);
 457             return AVERROR(EINVAL);
 458         }
 459
 460         if (!st->codecpar->extradata || !st->codecpar->extradata_size) {
 461             av_log(s, AV_LOG_ERROR, "No extradata present\n");
 462             return AVERROR_INVALIDDATA;
 463         }
 464         oggstream = av_mallocz(sizeof(*oggstream));
 465         if (!oggstream)
 466             return AVERROR(ENOMEM);
 467
 468         oggstream->page.stream_index = i;
 469
 470         if (!(s->flags & AVFMT_FLAG_BITEXACT))
 471             do {
 472                 serial_num = av_get_random_seed();
 473                 for (j = 0; j < i; j++) {
 474                     OGGStreamContext *sc = s->streams[j]->priv_data;
 475                     if (serial_num == sc->serial_num)
 476                         break;
 477                 }
 478             } while (j < i);
 479         oggstream->serial_num = serial_num;
 480
 481         av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE);
 482
 483         st->priv_data = oggstream;
 484         if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) {
 485             int err = ogg_build_flac_headers(st->codecpar, oggstream,
 486                                              s->flags & AVFMT_FLAG_BITEXACT,
 487                                              &st->metadata);
 488             if (err) {
 489                 av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
 490                 av_freep(&st->priv_data);
 491                 return err;
 492             }
 493         } else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
 494             int err = ogg_build_speex_headers(st->codecpar, oggstream,
 495                                               s->flags & AVFMT_FLAG_BITEXACT,
 496                                               &st->metadata);
 497             if (err) {
 498                 av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
 499                 av_freep(&st->priv_data);
 500                 return err;
 501             }
 502         } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
 503             int err = ogg_build_opus_headers(st->codecpar, oggstream,
 504                                              s->flags & AVFMT_FLAG_BITEXACT,
 505                                              &st->metadata);
 506             if (err) {
 507                 av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
 508                 av_freep(&st->priv_data);
 509                 return err;
 510             }
 511         } else {
 512             uint8_t *p;
 513             const char *cstr = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora";
 514             int header_type = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81;
 515             int framing_bit = st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0;
 516
 517             if (avpriv_split_xiph_headers(st->codecpar->extradata, st->codecpar->extradata_size,
 518                                       st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
 519                                       (const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
 520                 av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
 521                 av_freep(&st->priv_data);
 522                 return AVERROR_INVALIDDATA;
 523             }
 524
 525             p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT,
 526                                         &oggstream->header_len[1], &st->metadata,
 527                                         framing_bit);
 528             oggstream->header[1] = p;
 529             if (!p)
 530                 return AVERROR(ENOMEM);
 531
 532             bytestream_put_byte(&p, header_type);
 533             bytestream_put_buffer(&p, cstr, 6);
 534
 535             if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
 536                 /** KFGSHIFT is the width of the less significant section of the granule position
 537                     The less significant section is the frame count since the last keyframe */
 538                 oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5);
 539                 oggstream->vrev = oggstream->header[0][9];
 540                 av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n",
 541                        oggstream->kfgshift, oggstream->vrev);
 542             }
 543         }
 544     }
 545
 546     for (j = 0; j < s->nb_streams; j++) {
 547         OGGStreamContext *oggstream = s->streams[j]->priv_data;
 548         ogg_buffer_data(s, s->streams[j], oggstream->header[0],
 549                         oggstream->header_len[0], 0, 1);
 550         oggstream->page.flags |= 2; // bos
 551         ogg_buffer_page(s, oggstream);
 552     }
 553     for (j = 0; j < s->nb_streams; j++) {
 554         AVStream *st = s->streams[j];
 555         OGGStreamContext *oggstream = st->priv_data;
 556         for (i = 1; i < 3; i++) {
 557             if (oggstream->header_len[i])
 558                 ogg_buffer_data(s, st, oggstream->header[i],
 559                                 oggstream->header_len[i], 0, 1);
 560         }
 561         ogg_buffer_page(s, oggstream);
 562     }
 563
 564     oggstream->page.start_granule = AV_NOPTS_VALUE;
 565
 566     ogg_write_pages(s, 2);
 567
 568     return 0;
 569 }
 570
 571 static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 572 {
 573     AVStream *st = s->streams[pkt->stream_index];
 574     OGGStreamContext *oggstream = st->priv_data;
 575     int ret;
 576     int64_t granule;
 577
 578     if (st->codecpar->codec_id == AV_CODEC_ID_THEORA) {
 579         int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration;
 580         int pframe_count;
 581         if (pkt->flags & AV_PKT_FLAG_KEY)
 582             oggstream->last_kf_pts = pts;
 583         pframe_count = pts - oggstream->last_kf_pts;
 584         // prevent frame count from overflow if key frame flag is not set
 585         if (pframe_count >= (1<<oggstream->kfgshift)) {
 586             oggstream->last_kf_pts += pframe_count;
 587             pframe_count = 0;
 588         }
 589         granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count;
 590     } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS)
 591         granule = pkt->pts + pkt->duration +
 592                   av_rescale_q(st->codecpar->initial_padding,
 593                                (AVRational){ 1, st->codecpar->sample_rate },
 594                                st->time_base);
 595     else
 596         granule = pkt->pts + pkt->duration;
 597
 598     if (oggstream->page.start_granule == AV_NOPTS_VALUE)
 599         oggstream->page.start_granule = pkt->pts;
 600
 601     ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0);
 602     if (ret < 0)
 603         return ret;
 604
 605     ogg_write_pages(s, 0);
 606
 607     oggstream->last_granule = granule;
 608
 609     return 0;
 610 }
 611
 612 static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
 613 {
 614     int i;
 615
 616     if (pkt)
 617         return ogg_write_packet_internal(s, pkt);
 618
 619     for (i = 0; i < s->nb_streams; i++) {
 620         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 621         if (oggstream->page.segments_count)
 622             ogg_buffer_page(s, oggstream);
 623     }
 624
 625     ogg_write_pages(s, 2);
 626     return 1;
 627 }
 628
 629 static int ogg_write_trailer(AVFormatContext *s)
 630 {
 631     int i;
 632
 633     /* flush current page if needed */
 634     for (i = 0; i < s->nb_streams; i++) {
 635         OGGStreamContext *oggstream = s->streams[i]->priv_data;
 636
 637         if (oggstream->page.size > 0)
 638             ogg_buffer_page(s, oggstream);
 639     }
 640
 641     ogg_write_pages(s, 1);
 642
 643     for (i = 0; i < s->nb_streams; i++) {
 644         AVStream *st = s->streams[i];
 645         OGGStreamContext *oggstream = st->priv_data;
 646         if (st->codecpar->codec_id == AV_CODEC_ID_FLAC ||
 647             st->codecpar->codec_id == AV_CODEC_ID_SPEEX ||
 648             st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
 649             av_freep(&oggstream->header[0]);
 650         }
 651         av_freep(&oggstream->header[1]);
 652         av_freep(&st->priv_data);
 653     }
 654     return 0;
 655 }
 656
 657 #if CONFIG_OGG_MUXER
 658 OGG_CLASS(ogg, Ogg)
 659 AVOutputFormat ff_ogg_muxer = {
 660     .name              = "ogg",
 661     .long_name         = NULL_IF_CONFIG_SMALL("Ogg"),
 662     .mime_type         = "application/ogg",
 663     .extensions        = "ogg,ogv"
 664 #if !CONFIG_SPX_MUXER
 665                          ",spx"
 666 #endif
 667 #if !CONFIG_OPUS_MUXER
 668                          ",opus"
 669 #endif
 670                          ,
 671     .priv_data_size    = sizeof(OGGContext),
 672     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 673                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 674     .video_codec       = AV_CODEC_ID_THEORA,
 675     .write_header      = ogg_write_header,
 676     .write_packet      = ogg_write_packet,
 677     .write_trailer     = ogg_write_trailer,
 678     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 679     .priv_class        = &ogg_muxer_class,
 680 };
 681 #endif
 682
 683 #if CONFIG_OGA_MUXER
 684 OGG_CLASS(oga, Ogg audio)
 685 AVOutputFormat ff_oga_muxer = {
 686     .name              = "oga",
 687     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Audio"),
 688     .mime_type         = "audio/ogg",
 689     .extensions        = "oga",
 690     .priv_data_size    = sizeof(OGGContext),
 691     .audio_codec       = CONFIG_LIBVORBIS_ENCODER ?
 692                          AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC,
 693     .write_header      = ogg_write_header,
 694     .write_packet      = ogg_write_packet,
 695     .write_trailer     = ogg_write_trailer,
 696     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 697     .priv_class        = &oga_muxer_class,
 698 };
 699 #endif
 700
 701 #if CONFIG_SPX_MUXER
 702 OGG_CLASS(spx, Ogg Speex)
 703 AVOutputFormat ff_spx_muxer = {
 704     .name              = "spx",
 705     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Speex"),
 706     .mime_type         = "audio/ogg",
 707     .extensions        = "spx",
 708     .priv_data_size    = sizeof(OGGContext),
 709     .audio_codec       = AV_CODEC_ID_SPEEX,
 710     .write_header      = ogg_write_header,
 711     .write_packet      = ogg_write_packet,
 712     .write_trailer     = ogg_write_trailer,
 713     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 714     .priv_class        = &spx_muxer_class,
 715 };
 716 #endif
 717
 718 #if CONFIG_OPUS_MUXER
 719 OGG_CLASS(opus, Ogg Opus)
 720 AVOutputFormat ff_opus_muxer = {
 721     .name              = "opus",
 722     .long_name         = NULL_IF_CONFIG_SMALL("Ogg Opus"),
 723     .mime_type         = "audio/ogg",
 724     .extensions        = "opus",
 725     .priv_data_size    = sizeof(OGGContext),
 726     .audio_codec       = AV_CODEC_ID_OPUS,
 727     .write_header      = ogg_write_header,
 728     .write_packet      = ogg_write_packet,
 729     .write_trailer     = ogg_write_trailer,
 730     .flags             = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH,
 731     .priv_class        = &opus_muxer_class,
 732 };
 733 #endif