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