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