| 1 | /* |
| 2 | * Ogg muxer |
| 3 | * Copyright (c) 2007 Baptiste Coudurier <baptiste dot coudurier at free dot fr> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include <stdint.h> |
| 23 | |
| 24 | #include "libavutil/crc.h" |
| 25 | #include "libavutil/mathematics.h" |
| 26 | #include "libavutil/opt.h" |
| 27 | #include "libavutil/random_seed.h" |
| 28 | #include "libavcodec/xiph.h" |
| 29 | #include "libavcodec/bytestream.h" |
| 30 | #include "libavcodec/flac.h" |
| 31 | #include "avformat.h" |
| 32 | #include "avio_internal.h" |
| 33 | #include "internal.h" |
| 34 | #include "vorbiscomment.h" |
| 35 | |
| 36 | #define MAX_PAGE_SIZE 65025 |
| 37 | |
| 38 | typedef struct { |
| 39 | int64_t start_granule; |
| 40 | int64_t granule; |
| 41 | int stream_index; |
| 42 | uint8_t flags; |
| 43 | uint8_t segments_count; |
| 44 | uint8_t segments[255]; |
| 45 | uint8_t data[MAX_PAGE_SIZE]; |
| 46 | uint16_t size; |
| 47 | } OGGPage; |
| 48 | |
| 49 | typedef struct { |
| 50 | unsigned page_counter; |
| 51 | uint8_t *header[3]; |
| 52 | int header_len[3]; |
| 53 | /** for theora granule */ |
| 54 | int kfgshift; |
| 55 | int64_t last_kf_pts; |
| 56 | int vrev; |
| 57 | int eos; |
| 58 | unsigned page_count; ///< number of page buffered |
| 59 | OGGPage page; ///< current page |
| 60 | unsigned serial_num; ///< serial number |
| 61 | int64_t last_granule; ///< last packet granule |
| 62 | } OGGStreamContext; |
| 63 | |
| 64 | typedef struct OGGPageList { |
| 65 | OGGPage page; |
| 66 | struct OGGPageList *next; |
| 67 | } OGGPageList; |
| 68 | |
| 69 | typedef struct { |
| 70 | const AVClass *class; |
| 71 | OGGPageList *page_list; |
| 72 | int pref_size; ///< preferred page size (0 => fill all segments) |
| 73 | int64_t pref_duration; ///< preferred page duration (0 => fill all segments) |
| 74 | } OGGContext; |
| 75 | |
| 76 | #define OFFSET(x) offsetof(OGGContext, x) |
| 77 | #define PARAM AV_OPT_FLAG_ENCODING_PARAM |
| 78 | |
| 79 | static const AVOption options[] = { |
| 80 | { "oggpagesize", "Set preferred Ogg page size.", |
| 81 | offsetof(OGGContext, pref_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_PARAM}, |
| 82 | { "pagesize", "preferred page size in bytes (deprecated)", |
| 83 | OFFSET(pref_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, MAX_PAGE_SIZE, PARAM }, |
| 84 | { "page_duration", "preferred page duration, in microseconds", |
| 85 | OFFSET(pref_duration), AV_OPT_TYPE_INT64, { .i64 = 1000000 }, 0, INT64_MAX, PARAM }, |
| 86 | { NULL }, |
| 87 | }; |
| 88 | |
| 89 | #define OGG_CLASS(flavor, name)\ |
| 90 | static const AVClass flavor ## _muxer_class = {\ |
| 91 | .class_name = #name " muxer",\ |
| 92 | .item_name = av_default_item_name,\ |
| 93 | .option = options,\ |
| 94 | .version = LIBAVUTIL_VERSION_INT,\ |
| 95 | }; |
| 96 | |
| 97 | static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc_offset) |
| 98 | { |
| 99 | int64_t pos = avio_tell(pb); |
| 100 | uint32_t checksum = ffio_get_checksum(pb); |
| 101 | avio_seek(pb, crc_offset, SEEK_SET); |
| 102 | avio_wb32(pb, checksum); |
| 103 | avio_seek(pb, pos, SEEK_SET); |
| 104 | } |
| 105 | |
| 106 | static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags) |
| 107 | { |
| 108 | OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data; |
| 109 | AVIOContext *pb; |
| 110 | int64_t crc_offset; |
| 111 | int ret, size; |
| 112 | uint8_t *buf; |
| 113 | |
| 114 | ret = avio_open_dyn_buf(&pb); |
| 115 | if (ret < 0) |
| 116 | return ret; |
| 117 | ffio_init_checksum(pb, ff_crc04C11DB7_update, 0); |
| 118 | ffio_wfourcc(pb, "OggS"); |
| 119 | avio_w8(pb, 0); |
| 120 | avio_w8(pb, page->flags | extra_flags); |
| 121 | avio_wl64(pb, page->granule); |
| 122 | avio_wl32(pb, oggstream->serial_num); |
| 123 | avio_wl32(pb, oggstream->page_counter++); |
| 124 | crc_offset = avio_tell(pb); |
| 125 | avio_wl32(pb, 0); // crc |
| 126 | avio_w8(pb, page->segments_count); |
| 127 | avio_write(pb, page->segments, page->segments_count); |
| 128 | avio_write(pb, page->data, page->size); |
| 129 | |
| 130 | ogg_update_checksum(s, pb, crc_offset); |
| 131 | avio_flush(pb); |
| 132 | |
| 133 | size = avio_close_dyn_buf(pb, &buf); |
| 134 | if (size < 0) |
| 135 | return size; |
| 136 | |
| 137 | avio_write(s->pb, buf, size); |
| 138 | avio_flush(s->pb); |
| 139 | av_free(buf); |
| 140 | oggstream->page_count--; |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int ogg_key_granule(OGGStreamContext *oggstream, int64_t granule) |
| 145 | { |
| 146 | return oggstream->kfgshift && !(granule & ((1<<oggstream->kfgshift)-1)); |
| 147 | } |
| 148 | |
| 149 | static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, int64_t granule) |
| 150 | { |
| 151 | if (oggstream->kfgshift) |
| 152 | return (granule>>oggstream->kfgshift) + |
| 153 | (granule & ((1<<oggstream->kfgshift)-1)); |
| 154 | else |
| 155 | return granule; |
| 156 | } |
| 157 | |
| 158 | static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page) |
| 159 | { |
| 160 | AVStream *st2 = s->streams[next->stream_index]; |
| 161 | AVStream *st = s->streams[page->stream_index]; |
| 162 | int64_t next_granule, cur_granule; |
| 163 | |
| 164 | if (next->granule == -1 || page->granule == -1) |
| 165 | return 0; |
| 166 | |
| 167 | next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next->granule), |
| 168 | st2->time_base, AV_TIME_BASE_Q); |
| 169 | cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page->granule), |
| 170 | st ->time_base, AV_TIME_BASE_Q); |
| 171 | return next_granule > cur_granule; |
| 172 | } |
| 173 | |
| 174 | static int ogg_reset_cur_page(OGGStreamContext *oggstream) |
| 175 | { |
| 176 | oggstream->page.granule = -1; |
| 177 | oggstream->page.flags = 0; |
| 178 | oggstream->page.segments_count = 0; |
| 179 | oggstream->page.size = 0; |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream) |
| 184 | { |
| 185 | OGGContext *ogg = s->priv_data; |
| 186 | OGGPageList **p = &ogg->page_list; |
| 187 | OGGPageList *l = av_mallocz(sizeof(*l)); |
| 188 | |
| 189 | if (!l) |
| 190 | return AVERROR(ENOMEM); |
| 191 | l->page = oggstream->page; |
| 192 | |
| 193 | oggstream->page.start_granule = oggstream->page.granule; |
| 194 | oggstream->page_count++; |
| 195 | ogg_reset_cur_page(oggstream); |
| 196 | |
| 197 | while (*p) { |
| 198 | if (ogg_compare_granule(s, &(*p)->page, &l->page)) |
| 199 | break; |
| 200 | p = &(*p)->next; |
| 201 | } |
| 202 | l->next = *p; |
| 203 | *p = l; |
| 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | static int ogg_buffer_data(AVFormatContext *s, AVStream *st, |
| 209 | uint8_t *data, unsigned size, int64_t granule, |
| 210 | int header) |
| 211 | { |
| 212 | OGGStreamContext *oggstream = st->priv_data; |
| 213 | OGGContext *ogg = s->priv_data; |
| 214 | int total_segments = size / 255 + 1; |
| 215 | uint8_t *p = data; |
| 216 | int i, segments, len, flush = 0; |
| 217 | |
| 218 | // Handles VFR by flushing page because this frame needs to have a timestamp |
| 219 | // For theora, keyframes also need to have a timestamp to correctly mark |
| 220 | // them as such, otherwise seeking will not work correctly at the very |
| 221 | // least with old libogg versions. |
| 222 | // Do not try to flush header packets though, that will create broken files. |
| 223 | if (st->codec->codec_id == AV_CODEC_ID_THEORA && !header && |
| 224 | (ogg_granule_to_timestamp(oggstream, granule) > |
| 225 | ogg_granule_to_timestamp(oggstream, oggstream->last_granule) + 1 || |
| 226 | ogg_key_granule(oggstream, granule))) { |
| 227 | if (oggstream->page.granule != -1) |
| 228 | ogg_buffer_page(s, oggstream); |
| 229 | flush = 1; |
| 230 | } |
| 231 | |
| 232 | // avoid a continued page |
| 233 | if (!header && oggstream->page.size > 0 && |
| 234 | MAX_PAGE_SIZE - oggstream->page.size < size) { |
| 235 | ogg_buffer_page(s, oggstream); |
| 236 | } |
| 237 | |
| 238 | for (i = 0; i < total_segments; ) { |
| 239 | OGGPage *page = &oggstream->page; |
| 240 | |
| 241 | segments = FFMIN(total_segments - i, 255 - page->segments_count); |
| 242 | |
| 243 | if (i && !page->segments_count) |
| 244 | page->flags |= 1; // continued packet |
| 245 | |
| 246 | memset(page->segments+page->segments_count, 255, segments - 1); |
| 247 | page->segments_count += segments - 1; |
| 248 | |
| 249 | len = FFMIN(size, segments*255); |
| 250 | page->segments[page->segments_count++] = len - (segments-1)*255; |
| 251 | memcpy(page->data+page->size, p, len); |
| 252 | p += len; |
| 253 | size -= len; |
| 254 | i += segments; |
| 255 | page->size += len; |
| 256 | |
| 257 | if (i == total_segments) |
| 258 | page->granule = granule; |
| 259 | |
| 260 | if (!header) { |
| 261 | AVStream *st = s->streams[page->stream_index]; |
| 262 | |
| 263 | int64_t start = av_rescale_q(page->start_granule, st->time_base, |
| 264 | AV_TIME_BASE_Q); |
| 265 | int64_t next = av_rescale_q(page->granule, st->time_base, |
| 266 | AV_TIME_BASE_Q); |
| 267 | |
| 268 | if (page->segments_count == 255 || |
| 269 | (ogg->pref_size > 0 && page->size >= ogg->pref_size) || |
| 270 | (ogg->pref_duration > 0 && next - start >= ogg->pref_duration)) { |
| 271 | ogg_buffer_page(s, oggstream); |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if (flush && oggstream->page.granule != -1) |
| 277 | ogg_buffer_page(s, oggstream); |
| 278 | |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact, |
| 283 | int *header_len, AVDictionary **m, int framing_bit) |
| 284 | { |
| 285 | const char *vendor = bitexact ? "ffmpeg" : LIBAVFORMAT_IDENT; |
| 286 | int size; |
| 287 | uint8_t *p, *p0; |
| 288 | |
| 289 | ff_metadata_conv(m, ff_vorbiscomment_metadata_conv, NULL); |
| 290 | |
| 291 | size = offset + ff_vorbiscomment_length(*m, vendor) + framing_bit; |
| 292 | p = av_mallocz(size); |
| 293 | if (!p) |
| 294 | return NULL; |
| 295 | p0 = p; |
| 296 | |
| 297 | p += offset; |
| 298 | ff_vorbiscomment_write(&p, m, vendor); |
| 299 | if (framing_bit) |
| 300 | bytestream_put_byte(&p, 1); |
| 301 | |
| 302 | *header_len = size; |
| 303 | return p0; |
| 304 | } |
| 305 | |
| 306 | static int ogg_build_flac_headers(AVCodecContext *avctx, |
| 307 | OGGStreamContext *oggstream, int bitexact, |
| 308 | AVDictionary **m) |
| 309 | { |
| 310 | uint8_t *p; |
| 311 | |
| 312 | if (avctx->extradata_size < FLAC_STREAMINFO_SIZE) |
| 313 | return AVERROR(EINVAL); |
| 314 | |
| 315 | // first packet: STREAMINFO |
| 316 | oggstream->header_len[0] = 51; |
| 317 | oggstream->header[0] = av_mallocz(51); // per ogg flac specs |
| 318 | p = oggstream->header[0]; |
| 319 | if (!p) |
| 320 | return AVERROR(ENOMEM); |
| 321 | bytestream_put_byte(&p, 0x7F); |
| 322 | bytestream_put_buffer(&p, "FLAC", 4); |
| 323 | bytestream_put_byte(&p, 1); // major version |
| 324 | bytestream_put_byte(&p, 0); // minor version |
| 325 | bytestream_put_be16(&p, 1); // headers packets without this one |
| 326 | bytestream_put_buffer(&p, "fLaC", 4); |
| 327 | bytestream_put_byte(&p, 0x00); // streaminfo |
| 328 | bytestream_put_be24(&p, 34); |
| 329 | bytestream_put_buffer(&p, avctx->extradata, FLAC_STREAMINFO_SIZE); |
| 330 | |
| 331 | // second packet: VorbisComment |
| 332 | p = ogg_write_vorbiscomment(4, bitexact, &oggstream->header_len[1], m, 0); |
| 333 | if (!p) |
| 334 | return AVERROR(ENOMEM); |
| 335 | oggstream->header[1] = p; |
| 336 | bytestream_put_byte(&p, 0x84); // last metadata block and vorbis comment |
| 337 | bytestream_put_be24(&p, oggstream->header_len[1] - 4); |
| 338 | |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | #define SPEEX_HEADER_SIZE 80 |
| 343 | |
| 344 | static int ogg_build_speex_headers(AVCodecContext *avctx, |
| 345 | OGGStreamContext *oggstream, int bitexact, |
| 346 | AVDictionary **m) |
| 347 | { |
| 348 | uint8_t *p; |
| 349 | |
| 350 | if (avctx->extradata_size < SPEEX_HEADER_SIZE) |
| 351 | return AVERROR_INVALIDDATA; |
| 352 | |
| 353 | // first packet: Speex header |
| 354 | p = av_mallocz(SPEEX_HEADER_SIZE); |
| 355 | if (!p) |
| 356 | return AVERROR(ENOMEM); |
| 357 | oggstream->header[0] = p; |
| 358 | oggstream->header_len[0] = SPEEX_HEADER_SIZE; |
| 359 | bytestream_put_buffer(&p, avctx->extradata, SPEEX_HEADER_SIZE); |
| 360 | AV_WL32(&oggstream->header[0][68], 0); // set extra_headers to 0 |
| 361 | |
| 362 | // second packet: VorbisComment |
| 363 | p = ogg_write_vorbiscomment(0, bitexact, &oggstream->header_len[1], m, 0); |
| 364 | if (!p) |
| 365 | return AVERROR(ENOMEM); |
| 366 | oggstream->header[1] = p; |
| 367 | |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | #define OPUS_HEADER_SIZE 19 |
| 372 | |
| 373 | static int ogg_build_opus_headers(AVCodecContext *avctx, |
| 374 | OGGStreamContext *oggstream, int bitexact, |
| 375 | AVDictionary **m) |
| 376 | { |
| 377 | uint8_t *p; |
| 378 | |
| 379 | if (avctx->extradata_size < OPUS_HEADER_SIZE) |
| 380 | return AVERROR_INVALIDDATA; |
| 381 | |
| 382 | /* first packet: Opus header */ |
| 383 | p = av_mallocz(avctx->extradata_size); |
| 384 | if (!p) |
| 385 | return AVERROR(ENOMEM); |
| 386 | oggstream->header[0] = p; |
| 387 | oggstream->header_len[0] = avctx->extradata_size; |
| 388 | bytestream_put_buffer(&p, avctx->extradata, avctx->extradata_size); |
| 389 | |
| 390 | /* second packet: VorbisComment */ |
| 391 | p = ogg_write_vorbiscomment(8, bitexact, &oggstream->header_len[1], m, 0); |
| 392 | if (!p) |
| 393 | return AVERROR(ENOMEM); |
| 394 | oggstream->header[1] = p; |
| 395 | bytestream_put_buffer(&p, "OpusTags", 8); |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static void ogg_write_pages(AVFormatContext *s, int flush) |
| 401 | { |
| 402 | OGGContext *ogg = s->priv_data; |
| 403 | OGGPageList *next, *p; |
| 404 | |
| 405 | if (!ogg->page_list) |
| 406 | return; |
| 407 | |
| 408 | for (p = ogg->page_list; p; ) { |
| 409 | OGGStreamContext *oggstream = |
| 410 | s->streams[p->page.stream_index]->priv_data; |
| 411 | if (oggstream->page_count < 2 && !flush) |
| 412 | break; |
| 413 | ogg_write_page(s, &p->page, |
| 414 | flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos |
| 415 | next = p->next; |
| 416 | av_freep(&p); |
| 417 | p = next; |
| 418 | } |
| 419 | ogg->page_list = p; |
| 420 | } |
| 421 | |
| 422 | static int ogg_write_header(AVFormatContext *s) |
| 423 | { |
| 424 | OGGContext *ogg = s->priv_data; |
| 425 | OGGStreamContext *oggstream = NULL; |
| 426 | int i, j; |
| 427 | |
| 428 | if (ogg->pref_size) |
| 429 | av_log(s, AV_LOG_WARNING, "The pagesize option is deprecated\n"); |
| 430 | |
| 431 | for (i = 0; i < s->nb_streams; i++) { |
| 432 | AVStream *st = s->streams[i]; |
| 433 | unsigned serial_num = i; |
| 434 | |
| 435 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 436 | if (st->codec->codec_id == AV_CODEC_ID_OPUS) |
| 437 | /* Opus requires a fixed 48kHz clock */ |
| 438 | avpriv_set_pts_info(st, 64, 1, 48000); |
| 439 | else |
| 440 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
| 441 | } |
| 442 | |
| 443 | if (st->codec->codec_id != AV_CODEC_ID_VORBIS && |
| 444 | st->codec->codec_id != AV_CODEC_ID_THEORA && |
| 445 | st->codec->codec_id != AV_CODEC_ID_SPEEX && |
| 446 | st->codec->codec_id != AV_CODEC_ID_FLAC && |
| 447 | st->codec->codec_id != AV_CODEC_ID_OPUS) { |
| 448 | av_log(s, AV_LOG_ERROR, "Unsupported codec id in stream %d\n", i); |
| 449 | return AVERROR(EINVAL); |
| 450 | } |
| 451 | |
| 452 | if (!st->codec->extradata || !st->codec->extradata_size) { |
| 453 | av_log(s, AV_LOG_ERROR, "No extradata present\n"); |
| 454 | return AVERROR_INVALIDDATA; |
| 455 | } |
| 456 | oggstream = av_mallocz(sizeof(*oggstream)); |
| 457 | if (!oggstream) |
| 458 | return AVERROR(ENOMEM); |
| 459 | |
| 460 | oggstream->page.stream_index = i; |
| 461 | |
| 462 | if (!(s->flags & AVFMT_FLAG_BITEXACT)) |
| 463 | do { |
| 464 | serial_num = av_get_random_seed(); |
| 465 | for (j = 0; j < i; j++) { |
| 466 | OGGStreamContext *sc = s->streams[j]->priv_data; |
| 467 | if (serial_num == sc->serial_num) |
| 468 | break; |
| 469 | } |
| 470 | } while (j < i); |
| 471 | oggstream->serial_num = serial_num; |
| 472 | |
| 473 | av_dict_copy(&st->metadata, s->metadata, AV_DICT_DONT_OVERWRITE); |
| 474 | |
| 475 | st->priv_data = oggstream; |
| 476 | if (st->codec->codec_id == AV_CODEC_ID_FLAC) { |
| 477 | int err = ogg_build_flac_headers(st->codec, oggstream, |
| 478 | s->flags & AVFMT_FLAG_BITEXACT, |
| 479 | &st->metadata); |
| 480 | if (err) { |
| 481 | av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n"); |
| 482 | av_freep(&st->priv_data); |
| 483 | return err; |
| 484 | } |
| 485 | } else if (st->codec->codec_id == AV_CODEC_ID_SPEEX) { |
| 486 | int err = ogg_build_speex_headers(st->codec, oggstream, |
| 487 | s->flags & AVFMT_FLAG_BITEXACT, |
| 488 | &st->metadata); |
| 489 | if (err) { |
| 490 | av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n"); |
| 491 | av_freep(&st->priv_data); |
| 492 | return err; |
| 493 | } |
| 494 | } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) { |
| 495 | int err = ogg_build_opus_headers(st->codec, oggstream, |
| 496 | s->flags & AVFMT_FLAG_BITEXACT, |
| 497 | &st->metadata); |
| 498 | if (err) { |
| 499 | av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n"); |
| 500 | av_freep(&st->priv_data); |
| 501 | return err; |
| 502 | } |
| 503 | } else { |
| 504 | uint8_t *p; |
| 505 | const char *cstr = st->codec->codec_id == AV_CODEC_ID_VORBIS ? "vorbis" : "theora"; |
| 506 | int header_type = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 3 : 0x81; |
| 507 | int framing_bit = st->codec->codec_id == AV_CODEC_ID_VORBIS ? 1 : 0; |
| 508 | |
| 509 | if (avpriv_split_xiph_headers(st->codec->extradata, st->codec->extradata_size, |
| 510 | st->codec->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42, |
| 511 | oggstream->header, oggstream->header_len) < 0) { |
| 512 | av_log(s, AV_LOG_ERROR, "Extradata corrupted\n"); |
| 513 | av_freep(&st->priv_data); |
| 514 | return AVERROR_INVALIDDATA; |
| 515 | } |
| 516 | |
| 517 | p = ogg_write_vorbiscomment(7, s->flags & AVFMT_FLAG_BITEXACT, |
| 518 | &oggstream->header_len[1], &st->metadata, |
| 519 | framing_bit); |
| 520 | oggstream->header[1] = p; |
| 521 | if (!p) |
| 522 | return AVERROR(ENOMEM); |
| 523 | |
| 524 | bytestream_put_byte(&p, header_type); |
| 525 | bytestream_put_buffer(&p, cstr, 6); |
| 526 | |
| 527 | if (st->codec->codec_id == AV_CODEC_ID_THEORA) { |
| 528 | /** KFGSHIFT is the width of the less significant section of the granule position |
| 529 | The less significant section is the frame count since the last keyframe */ |
| 530 | oggstream->kfgshift = ((oggstream->header[0][40]&3)<<3)|(oggstream->header[0][41]>>5); |
| 531 | oggstream->vrev = oggstream->header[0][9]; |
| 532 | av_log(s, AV_LOG_DEBUG, "theora kfgshift %d, vrev %d\n", |
| 533 | oggstream->kfgshift, oggstream->vrev); |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | for (j = 0; j < s->nb_streams; j++) { |
| 539 | OGGStreamContext *oggstream = s->streams[j]->priv_data; |
| 540 | ogg_buffer_data(s, s->streams[j], oggstream->header[0], |
| 541 | oggstream->header_len[0], 0, 1); |
| 542 | oggstream->page.flags |= 2; // bos |
| 543 | ogg_buffer_page(s, oggstream); |
| 544 | } |
| 545 | for (j = 0; j < s->nb_streams; j++) { |
| 546 | AVStream *st = s->streams[j]; |
| 547 | OGGStreamContext *oggstream = st->priv_data; |
| 548 | for (i = 1; i < 3; i++) { |
| 549 | if (oggstream->header_len[i]) |
| 550 | ogg_buffer_data(s, st, oggstream->header[i], |
| 551 | oggstream->header_len[i], 0, 1); |
| 552 | } |
| 553 | ogg_buffer_page(s, oggstream); |
| 554 | } |
| 555 | |
| 556 | oggstream->page.start_granule = AV_NOPTS_VALUE; |
| 557 | |
| 558 | ogg_write_pages(s, 2); |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static int ogg_write_packet_internal(AVFormatContext *s, AVPacket *pkt) |
| 564 | { |
| 565 | AVStream *st = s->streams[pkt->stream_index]; |
| 566 | OGGStreamContext *oggstream = st->priv_data; |
| 567 | int ret; |
| 568 | int64_t granule; |
| 569 | |
| 570 | if (st->codec->codec_id == AV_CODEC_ID_THEORA) { |
| 571 | int64_t pts = oggstream->vrev < 1 ? pkt->pts : pkt->pts + pkt->duration; |
| 572 | int pframe_count; |
| 573 | if (pkt->flags & AV_PKT_FLAG_KEY) |
| 574 | oggstream->last_kf_pts = pts; |
| 575 | pframe_count = pts - oggstream->last_kf_pts; |
| 576 | // prevent frame count from overflow if key frame flag is not set |
| 577 | if (pframe_count >= (1<<oggstream->kfgshift)) { |
| 578 | oggstream->last_kf_pts += pframe_count; |
| 579 | pframe_count = 0; |
| 580 | } |
| 581 | granule = (oggstream->last_kf_pts<<oggstream->kfgshift) | pframe_count; |
| 582 | } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) |
| 583 | granule = pkt->pts + pkt->duration + |
| 584 | av_rescale_q(st->codec->initial_padding, |
| 585 | (AVRational){ 1, st->codec->sample_rate }, |
| 586 | st->time_base); |
| 587 | else |
| 588 | granule = pkt->pts + pkt->duration; |
| 589 | |
| 590 | if (oggstream->page.start_granule == AV_NOPTS_VALUE) |
| 591 | oggstream->page.start_granule = pkt->pts; |
| 592 | |
| 593 | ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule, 0); |
| 594 | if (ret < 0) |
| 595 | return ret; |
| 596 | |
| 597 | ogg_write_pages(s, 0); |
| 598 | |
| 599 | oggstream->last_granule = granule; |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt) |
| 605 | { |
| 606 | int i; |
| 607 | |
| 608 | if (pkt) |
| 609 | return ogg_write_packet_internal(s, pkt); |
| 610 | |
| 611 | for (i = 0; i < s->nb_streams; i++) { |
| 612 | OGGStreamContext *oggstream = s->streams[i]->priv_data; |
| 613 | if (oggstream->page.segments_count) |
| 614 | ogg_buffer_page(s, oggstream); |
| 615 | } |
| 616 | |
| 617 | ogg_write_pages(s, 2); |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | static int ogg_write_trailer(AVFormatContext *s) |
| 622 | { |
| 623 | int i; |
| 624 | |
| 625 | /* flush current page if needed */ |
| 626 | for (i = 0; i < s->nb_streams; i++) { |
| 627 | OGGStreamContext *oggstream = s->streams[i]->priv_data; |
| 628 | |
| 629 | if (oggstream->page.size > 0) |
| 630 | ogg_buffer_page(s, oggstream); |
| 631 | } |
| 632 | |
| 633 | ogg_write_pages(s, 1); |
| 634 | |
| 635 | for (i = 0; i < s->nb_streams; i++) { |
| 636 | AVStream *st = s->streams[i]; |
| 637 | OGGStreamContext *oggstream = st->priv_data; |
| 638 | if (st->codec->codec_id == AV_CODEC_ID_FLAC || |
| 639 | st->codec->codec_id == AV_CODEC_ID_SPEEX || |
| 640 | st->codec->codec_id == AV_CODEC_ID_OPUS) { |
| 641 | av_freep(&oggstream->header[0]); |
| 642 | } |
| 643 | av_freep(&oggstream->header[1]); |
| 644 | av_freep(&st->priv_data); |
| 645 | } |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | #if CONFIG_OGG_MUXER |
| 650 | OGG_CLASS(ogg, Ogg) |
| 651 | AVOutputFormat ff_ogg_muxer = { |
| 652 | .name = "ogg", |
| 653 | .long_name = NULL_IF_CONFIG_SMALL("Ogg"), |
| 654 | .mime_type = "application/ogg", |
| 655 | .extensions = "ogg,ogv" |
| 656 | #if !CONFIG_SPX_MUXER |
| 657 | ",spx" |
| 658 | #endif |
| 659 | #if !CONFIG_OPUS_MUXER |
| 660 | ",opus" |
| 661 | #endif |
| 662 | , |
| 663 | .priv_data_size = sizeof(OGGContext), |
| 664 | .audio_codec = CONFIG_LIBVORBIS_ENCODER ? |
| 665 | AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, |
| 666 | .video_codec = AV_CODEC_ID_THEORA, |
| 667 | .write_header = ogg_write_header, |
| 668 | .write_packet = ogg_write_packet, |
| 669 | .write_trailer = ogg_write_trailer, |
| 670 | .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| 671 | .priv_class = &ogg_muxer_class, |
| 672 | }; |
| 673 | #endif |
| 674 | |
| 675 | #if CONFIG_OGA_MUXER |
| 676 | OGG_CLASS(oga, Ogg audio) |
| 677 | AVOutputFormat ff_oga_muxer = { |
| 678 | .name = "oga", |
| 679 | .long_name = NULL_IF_CONFIG_SMALL("Ogg Audio"), |
| 680 | .mime_type = "audio/ogg", |
| 681 | .extensions = "oga", |
| 682 | .priv_data_size = sizeof(OGGContext), |
| 683 | .audio_codec = CONFIG_LIBVORBIS_ENCODER ? |
| 684 | AV_CODEC_ID_VORBIS : AV_CODEC_ID_FLAC, |
| 685 | .write_header = ogg_write_header, |
| 686 | .write_packet = ogg_write_packet, |
| 687 | .write_trailer = ogg_write_trailer, |
| 688 | .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| 689 | .priv_class = &oga_muxer_class, |
| 690 | }; |
| 691 | #endif |
| 692 | |
| 693 | #if CONFIG_SPX_MUXER |
| 694 | OGG_CLASS(spx, Ogg Speex) |
| 695 | AVOutputFormat ff_spx_muxer = { |
| 696 | .name = "spx", |
| 697 | .long_name = NULL_IF_CONFIG_SMALL("Ogg Speex"), |
| 698 | .mime_type = "audio/ogg", |
| 699 | .extensions = "spx", |
| 700 | .priv_data_size = sizeof(OGGContext), |
| 701 | .audio_codec = AV_CODEC_ID_SPEEX, |
| 702 | .write_header = ogg_write_header, |
| 703 | .write_packet = ogg_write_packet, |
| 704 | .write_trailer = ogg_write_trailer, |
| 705 | .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| 706 | .priv_class = &spx_muxer_class, |
| 707 | }; |
| 708 | #endif |
| 709 | |
| 710 | #if CONFIG_OPUS_MUXER |
| 711 | OGG_CLASS(opus, Ogg Opus) |
| 712 | AVOutputFormat ff_opus_muxer = { |
| 713 | .name = "opus", |
| 714 | .long_name = NULL_IF_CONFIG_SMALL("Ogg Opus"), |
| 715 | .mime_type = "audio/ogg", |
| 716 | .extensions = "opus", |
| 717 | .priv_data_size = sizeof(OGGContext), |
| 718 | .audio_codec = AV_CODEC_ID_OPUS, |
| 719 | .write_header = ogg_write_header, |
| 720 | .write_packet = ogg_write_packet, |
| 721 | .write_trailer = ogg_write_trailer, |
| 722 | .flags = AVFMT_TS_NEGATIVE | AVFMT_ALLOW_FLUSH, |
| 723 | .priv_class = &opus_muxer_class, |
| 724 | }; |
| 725 | #endif |