| 1 | /* |
| 2 | * various utility functions for use within FFmpeg |
| 3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
| 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 | #undef NDEBUG |
| 23 | #include <assert.h> |
| 24 | #include <stdarg.h> |
| 25 | #include <stdint.h> |
| 26 | |
| 27 | #include "config.h" |
| 28 | |
| 29 | #include "libavutil/avassert.h" |
| 30 | #include "libavutil/avstring.h" |
| 31 | #include "libavutil/dict.h" |
| 32 | #include "libavutil/internal.h" |
| 33 | #include "libavutil/mathematics.h" |
| 34 | #include "libavutil/opt.h" |
| 35 | #include "libavutil/parseutils.h" |
| 36 | #include "libavutil/pixdesc.h" |
| 37 | #include "libavutil/time.h" |
| 38 | #include "libavutil/timestamp.h" |
| 39 | |
| 40 | #include "libavcodec/bytestream.h" |
| 41 | #include "libavcodec/internal.h" |
| 42 | #include "libavcodec/raw.h" |
| 43 | |
| 44 | #include "audiointerleave.h" |
| 45 | #include "avformat.h" |
| 46 | #include "avio_internal.h" |
| 47 | #include "id3v2.h" |
| 48 | #include "internal.h" |
| 49 | #include "metadata.h" |
| 50 | #if CONFIG_NETWORK |
| 51 | #include "network.h" |
| 52 | #endif |
| 53 | #include "riff.h" |
| 54 | #include "url.h" |
| 55 | |
| 56 | /** |
| 57 | * @file |
| 58 | * various utility functions for use within FFmpeg |
| 59 | */ |
| 60 | |
| 61 | unsigned avformat_version(void) |
| 62 | { |
| 63 | av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100); |
| 64 | return LIBAVFORMAT_VERSION_INT; |
| 65 | } |
| 66 | |
| 67 | const char *avformat_configuration(void) |
| 68 | { |
| 69 | return FFMPEG_CONFIGURATION; |
| 70 | } |
| 71 | |
| 72 | const char *avformat_license(void) |
| 73 | { |
| 74 | #define LICENSE_PREFIX "libavformat license: " |
| 75 | return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
| 76 | } |
| 77 | |
| 78 | #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48)) |
| 79 | |
| 80 | static int is_relative(int64_t ts) { |
| 81 | return ts > (RELATIVE_TS_BASE - (1LL<<48)); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Wrap a given time stamp, if there is an indication for an overflow |
| 86 | * |
| 87 | * @param st stream |
| 88 | * @param timestamp the time stamp to wrap |
| 89 | * @return resulting time stamp |
| 90 | */ |
| 91 | static int64_t wrap_timestamp(AVStream *st, int64_t timestamp) |
| 92 | { |
| 93 | if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE && |
| 94 | st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) { |
| 95 | if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET && |
| 96 | timestamp < st->pts_wrap_reference) |
| 97 | return timestamp + (1ULL << st->pts_wrap_bits); |
| 98 | else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET && |
| 99 | timestamp >= st->pts_wrap_reference) |
| 100 | return timestamp - (1ULL << st->pts_wrap_bits); |
| 101 | } |
| 102 | return timestamp; |
| 103 | } |
| 104 | |
| 105 | MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate) |
| 106 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec) |
| 107 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec) |
| 108 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec) |
| 109 | MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding) |
| 110 | MAKE_ACCESSORS(AVFormatContext, format, void *, opaque) |
| 111 | MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb) |
| 112 | |
| 113 | int64_t av_stream_get_end_pts(const AVStream *st) |
| 114 | { |
| 115 | return st->pts.val; |
| 116 | } |
| 117 | |
| 118 | struct AVCodecParserContext *av_stream_get_parser(const AVStream *st) |
| 119 | { |
| 120 | return st->parser; |
| 121 | } |
| 122 | |
| 123 | void av_format_inject_global_side_data(AVFormatContext *s) |
| 124 | { |
| 125 | int i; |
| 126 | s->internal->inject_global_side_data = 1; |
| 127 | for (i = 0; i < s->nb_streams; i++) { |
| 128 | AVStream *st = s->streams[i]; |
| 129 | st->inject_global_side_data = 1; |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id) |
| 134 | { |
| 135 | if (st->codec->codec) |
| 136 | return st->codec->codec; |
| 137 | |
| 138 | switch (st->codec->codec_type) { |
| 139 | case AVMEDIA_TYPE_VIDEO: |
| 140 | if (s->video_codec) return s->video_codec; |
| 141 | break; |
| 142 | case AVMEDIA_TYPE_AUDIO: |
| 143 | if (s->audio_codec) return s->audio_codec; |
| 144 | break; |
| 145 | case AVMEDIA_TYPE_SUBTITLE: |
| 146 | if (s->subtitle_codec) return s->subtitle_codec; |
| 147 | break; |
| 148 | } |
| 149 | |
| 150 | return avcodec_find_decoder(codec_id); |
| 151 | } |
| 152 | |
| 153 | int av_format_get_probe_score(const AVFormatContext *s) |
| 154 | { |
| 155 | return s->probe_score; |
| 156 | } |
| 157 | |
| 158 | /* an arbitrarily chosen "sane" max packet size -- 50M */ |
| 159 | #define SANE_CHUNK_SIZE (50000000) |
| 160 | |
| 161 | int ffio_limit(AVIOContext *s, int size) |
| 162 | { |
| 163 | if (s->maxsize>= 0) { |
| 164 | int64_t remaining= s->maxsize - avio_tell(s); |
| 165 | if (remaining < size) { |
| 166 | int64_t newsize = avio_size(s); |
| 167 | if (!s->maxsize || s->maxsize<newsize) |
| 168 | s->maxsize = newsize - !newsize; |
| 169 | remaining= s->maxsize - avio_tell(s); |
| 170 | remaining= FFMAX(remaining, 0); |
| 171 | } |
| 172 | |
| 173 | if (s->maxsize>= 0 && remaining+1 < size) { |
| 174 | av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1); |
| 175 | size = remaining+1; |
| 176 | } |
| 177 | } |
| 178 | return size; |
| 179 | } |
| 180 | |
| 181 | /* Read the data in sane-sized chunks and append to pkt. |
| 182 | * Return the number of bytes read or an error. */ |
| 183 | static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size) |
| 184 | { |
| 185 | int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos |
| 186 | int orig_size = pkt->size; |
| 187 | int ret; |
| 188 | |
| 189 | do { |
| 190 | int prev_size = pkt->size; |
| 191 | int read_size; |
| 192 | |
| 193 | /* When the caller requests a lot of data, limit it to the amount |
| 194 | * left in file or SANE_CHUNK_SIZE when it is not known. */ |
| 195 | read_size = size; |
| 196 | if (read_size > SANE_CHUNK_SIZE/10) { |
| 197 | read_size = ffio_limit(s, read_size); |
| 198 | // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE |
| 199 | if (s->maxsize < 0) |
| 200 | read_size = FFMIN(read_size, SANE_CHUNK_SIZE); |
| 201 | } |
| 202 | |
| 203 | ret = av_grow_packet(pkt, read_size); |
| 204 | if (ret < 0) |
| 205 | break; |
| 206 | |
| 207 | ret = avio_read(s, pkt->data + prev_size, read_size); |
| 208 | if (ret != read_size) { |
| 209 | av_shrink_packet(pkt, prev_size + FFMAX(ret, 0)); |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | size -= read_size; |
| 214 | } while (size > 0); |
| 215 | if (size > 0) |
| 216 | pkt->flags |= AV_PKT_FLAG_CORRUPT; |
| 217 | |
| 218 | pkt->pos = orig_pos; |
| 219 | if (!pkt->size) |
| 220 | av_free_packet(pkt); |
| 221 | return pkt->size > orig_size ? pkt->size - orig_size : ret; |
| 222 | } |
| 223 | |
| 224 | int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) |
| 225 | { |
| 226 | av_init_packet(pkt); |
| 227 | pkt->data = NULL; |
| 228 | pkt->size = 0; |
| 229 | pkt->pos = avio_tell(s); |
| 230 | |
| 231 | return append_packet_chunked(s, pkt, size); |
| 232 | } |
| 233 | |
| 234 | int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) |
| 235 | { |
| 236 | if (!pkt->size) |
| 237 | return av_get_packet(s, pkt, size); |
| 238 | return append_packet_chunked(s, pkt, size); |
| 239 | } |
| 240 | |
| 241 | int av_filename_number_test(const char *filename) |
| 242 | { |
| 243 | char buf[1024]; |
| 244 | return filename && |
| 245 | (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0); |
| 246 | } |
| 247 | |
| 248 | static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, |
| 249 | AVProbeData *pd) |
| 250 | { |
| 251 | static const struct { |
| 252 | const char *name; |
| 253 | enum AVCodecID id; |
| 254 | enum AVMediaType type; |
| 255 | } fmt_id_type[] = { |
| 256 | { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO }, |
| 257 | { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO }, |
| 258 | { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO }, |
| 259 | { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO }, |
| 260 | { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO }, |
| 261 | { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO }, |
| 262 | { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO }, |
| 263 | { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO }, |
| 264 | { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO }, |
| 265 | { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO }, |
| 266 | { 0 } |
| 267 | }; |
| 268 | int score; |
| 269 | AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score); |
| 270 | |
| 271 | if (fmt && st->request_probe <= score) { |
| 272 | int i; |
| 273 | av_log(s, AV_LOG_DEBUG, |
| 274 | "Probe with size=%d, packets=%d detected %s with score=%d\n", |
| 275 | pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, |
| 276 | fmt->name, score); |
| 277 | for (i = 0; fmt_id_type[i].name; i++) { |
| 278 | if (!strcmp(fmt->name, fmt_id_type[i].name)) { |
| 279 | st->codec->codec_id = fmt_id_type[i].id; |
| 280 | st->codec->codec_type = fmt_id_type[i].type; |
| 281 | return score; |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | /************************************************************/ |
| 289 | /* input media file */ |
| 290 | |
| 291 | int av_demuxer_open(AVFormatContext *ic) { |
| 292 | int err; |
| 293 | |
| 294 | if (ic->iformat->read_header) { |
| 295 | err = ic->iformat->read_header(ic); |
| 296 | if (err < 0) |
| 297 | return err; |
| 298 | } |
| 299 | |
| 300 | if (ic->pb && !ic->data_offset) |
| 301 | ic->data_offset = avio_tell(ic->pb); |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* Open input file and probe the format if necessary. */ |
| 307 | static int init_input(AVFormatContext *s, const char *filename, |
| 308 | AVDictionary **options) |
| 309 | { |
| 310 | int ret; |
| 311 | AVProbeData pd = { filename, NULL, 0 }; |
| 312 | int score = AVPROBE_SCORE_RETRY; |
| 313 | |
| 314 | if (s->pb) { |
| 315 | s->flags |= AVFMT_FLAG_CUSTOM_IO; |
| 316 | if (!s->iformat) |
| 317 | return av_probe_input_buffer2(s->pb, &s->iformat, filename, |
| 318 | s, 0, s->format_probesize); |
| 319 | else if (s->iformat->flags & AVFMT_NOFILE) |
| 320 | av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and " |
| 321 | "will be ignored with AVFMT_NOFILE format.\n"); |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) || |
| 326 | (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score)))) |
| 327 | return score; |
| 328 | |
| 329 | if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags, |
| 330 | &s->interrupt_callback, options)) < 0) |
| 331 | return ret; |
| 332 | if (s->iformat) |
| 333 | return 0; |
| 334 | return av_probe_input_buffer2(s->pb, &s->iformat, filename, |
| 335 | s, 0, s->format_probesize); |
| 336 | } |
| 337 | |
| 338 | static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt, |
| 339 | AVPacketList **plast_pktl) |
| 340 | { |
| 341 | AVPacketList *pktl = av_mallocz(sizeof(AVPacketList)); |
| 342 | if (!pktl) |
| 343 | return NULL; |
| 344 | |
| 345 | if (*packet_buffer) |
| 346 | (*plast_pktl)->next = pktl; |
| 347 | else |
| 348 | *packet_buffer = pktl; |
| 349 | |
| 350 | /* Add the packet in the buffered packet list. */ |
| 351 | *plast_pktl = pktl; |
| 352 | pktl->pkt = *pkt; |
| 353 | return &pktl->pkt; |
| 354 | } |
| 355 | |
| 356 | int avformat_queue_attached_pictures(AVFormatContext *s) |
| 357 | { |
| 358 | int i; |
| 359 | for (i = 0; i < s->nb_streams; i++) |
| 360 | if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC && |
| 361 | s->streams[i]->discard < AVDISCARD_ALL) { |
| 362 | AVPacket copy = s->streams[i]->attached_pic; |
| 363 | if (copy.size <= 0) { |
| 364 | av_log(s, AV_LOG_WARNING, |
| 365 | "Attached picture on stream %d has invalid size, " |
| 366 | "ignoring\n", i); |
| 367 | continue; |
| 368 | } |
| 369 | copy.buf = av_buffer_ref(copy.buf); |
| 370 | if (!copy.buf) |
| 371 | return AVERROR(ENOMEM); |
| 372 | |
| 373 | add_to_pktbuf(&s->raw_packet_buffer, ©, |
| 374 | &s->raw_packet_buffer_end); |
| 375 | } |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | int avformat_open_input(AVFormatContext **ps, const char *filename, |
| 380 | AVInputFormat *fmt, AVDictionary **options) |
| 381 | { |
| 382 | AVFormatContext *s = *ps; |
| 383 | int ret = 0; |
| 384 | AVDictionary *tmp = NULL; |
| 385 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
| 386 | |
| 387 | if (!s && !(s = avformat_alloc_context())) |
| 388 | return AVERROR(ENOMEM); |
| 389 | if (!s->av_class) { |
| 390 | av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n"); |
| 391 | return AVERROR(EINVAL); |
| 392 | } |
| 393 | if (fmt) |
| 394 | s->iformat = fmt; |
| 395 | |
| 396 | if (options) |
| 397 | av_dict_copy(&tmp, *options, 0); |
| 398 | |
| 399 | if ((ret = av_opt_set_dict(s, &tmp)) < 0) |
| 400 | goto fail; |
| 401 | |
| 402 | if ((ret = init_input(s, filename, &tmp)) < 0) |
| 403 | goto fail; |
| 404 | s->probe_score = ret; |
| 405 | avio_skip(s->pb, s->skip_initial_bytes); |
| 406 | |
| 407 | /* Check filename in case an image number is expected. */ |
| 408 | if (s->iformat->flags & AVFMT_NEEDNUMBER) { |
| 409 | if (!av_filename_number_test(filename)) { |
| 410 | ret = AVERROR(EINVAL); |
| 411 | goto fail; |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | s->duration = s->start_time = AV_NOPTS_VALUE; |
| 416 | av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename)); |
| 417 | |
| 418 | /* Allocate private data. */ |
| 419 | if (s->iformat->priv_data_size > 0) { |
| 420 | if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) { |
| 421 | ret = AVERROR(ENOMEM); |
| 422 | goto fail; |
| 423 | } |
| 424 | if (s->iformat->priv_class) { |
| 425 | *(const AVClass **) s->priv_data = s->iformat->priv_class; |
| 426 | av_opt_set_defaults(s->priv_data); |
| 427 | if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
| 428 | goto fail; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ |
| 433 | if (s->pb) |
| 434 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0); |
| 435 | |
| 436 | if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header) |
| 437 | if ((ret = s->iformat->read_header(s)) < 0) |
| 438 | goto fail; |
| 439 | |
| 440 | if (id3v2_extra_meta) { |
| 441 | if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") || |
| 442 | !strcmp(s->iformat->name, "tta")) { |
| 443 | if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) |
| 444 | goto fail; |
| 445 | } else |
| 446 | av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n"); |
| 447 | } |
| 448 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| 449 | |
| 450 | if ((ret = avformat_queue_attached_pictures(s)) < 0) |
| 451 | goto fail; |
| 452 | |
| 453 | if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset) |
| 454 | s->data_offset = avio_tell(s->pb); |
| 455 | |
| 456 | s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
| 457 | |
| 458 | if (options) { |
| 459 | av_dict_free(options); |
| 460 | *options = tmp; |
| 461 | } |
| 462 | *ps = s; |
| 463 | return 0; |
| 464 | |
| 465 | fail: |
| 466 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| 467 | av_dict_free(&tmp); |
| 468 | if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) |
| 469 | avio_close(s->pb); |
| 470 | avformat_free_context(s); |
| 471 | *ps = NULL; |
| 472 | return ret; |
| 473 | } |
| 474 | |
| 475 | /*******************************************************/ |
| 476 | |
| 477 | static void force_codec_ids(AVFormatContext *s, AVStream *st) |
| 478 | { |
| 479 | switch (st->codec->codec_type) { |
| 480 | case AVMEDIA_TYPE_VIDEO: |
| 481 | if (s->video_codec_id) |
| 482 | st->codec->codec_id = s->video_codec_id; |
| 483 | break; |
| 484 | case AVMEDIA_TYPE_AUDIO: |
| 485 | if (s->audio_codec_id) |
| 486 | st->codec->codec_id = s->audio_codec_id; |
| 487 | break; |
| 488 | case AVMEDIA_TYPE_SUBTITLE: |
| 489 | if (s->subtitle_codec_id) |
| 490 | st->codec->codec_id = s->subtitle_codec_id; |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt) |
| 496 | { |
| 497 | if (st->request_probe>0) { |
| 498 | AVProbeData *pd = &st->probe_data; |
| 499 | int end; |
| 500 | av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets); |
| 501 | --st->probe_packets; |
| 502 | |
| 503 | if (pkt) { |
| 504 | uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
| 505 | if (!new_buf) { |
| 506 | av_log(s, AV_LOG_WARNING, |
| 507 | "Failed to reallocate probe buffer for stream %d\n", |
| 508 | st->index); |
| 509 | goto no_packet; |
| 510 | } |
| 511 | pd->buf = new_buf; |
| 512 | memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size); |
| 513 | pd->buf_size += pkt->size; |
| 514 | memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE); |
| 515 | } else { |
| 516 | no_packet: |
| 517 | st->probe_packets = 0; |
| 518 | if (!pd->buf_size) { |
| 519 | av_log(s, AV_LOG_WARNING, |
| 520 | "nothing to probe for stream %d\n", st->index); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | end= s->raw_packet_buffer_remaining_size <= 0 |
| 525 | || st->probe_packets<= 0; |
| 526 | |
| 527 | if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) { |
| 528 | int score = set_codec_from_probe_data(s, st, pd); |
| 529 | if ( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY) |
| 530 | || end) { |
| 531 | pd->buf_size = 0; |
| 532 | av_freep(&pd->buf); |
| 533 | st->request_probe = -1; |
| 534 | if (st->codec->codec_id != AV_CODEC_ID_NONE) { |
| 535 | av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index); |
| 536 | } else |
| 537 | av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index); |
| 538 | } |
| 539 | force_codec_ids(s, st); |
| 540 | } |
| 541 | } |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt) |
| 546 | { |
| 547 | int64_t ref = pkt->dts; |
| 548 | int i, pts_wrap_behavior; |
| 549 | int64_t pts_wrap_reference; |
| 550 | AVProgram *first_program; |
| 551 | |
| 552 | if (ref == AV_NOPTS_VALUE) |
| 553 | ref = pkt->pts; |
| 554 | if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow) |
| 555 | return 0; |
| 556 | ref &= (1LL << st->pts_wrap_bits)-1; |
| 557 | |
| 558 | // reference time stamp should be 60 s before first time stamp |
| 559 | pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num); |
| 560 | // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset |
| 561 | pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) || |
| 562 | (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ? |
| 563 | AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET; |
| 564 | |
| 565 | first_program = av_find_program_from_stream(s, NULL, stream_index); |
| 566 | |
| 567 | if (!first_program) { |
| 568 | int default_stream_index = av_find_default_stream_index(s); |
| 569 | if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) { |
| 570 | for (i = 0; i < s->nb_streams; i++) { |
| 571 | s->streams[i]->pts_wrap_reference = pts_wrap_reference; |
| 572 | s->streams[i]->pts_wrap_behavior = pts_wrap_behavior; |
| 573 | } |
| 574 | } |
| 575 | else { |
| 576 | st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference; |
| 577 | st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior; |
| 578 | } |
| 579 | } |
| 580 | else { |
| 581 | AVProgram *program = first_program; |
| 582 | while (program) { |
| 583 | if (program->pts_wrap_reference != AV_NOPTS_VALUE) { |
| 584 | pts_wrap_reference = program->pts_wrap_reference; |
| 585 | pts_wrap_behavior = program->pts_wrap_behavior; |
| 586 | break; |
| 587 | } |
| 588 | program = av_find_program_from_stream(s, program, stream_index); |
| 589 | } |
| 590 | |
| 591 | // update every program with differing pts_wrap_reference |
| 592 | program = first_program; |
| 593 | while (program) { |
| 594 | if (program->pts_wrap_reference != pts_wrap_reference) { |
| 595 | for (i = 0; i<program->nb_stream_indexes; i++) { |
| 596 | s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference; |
| 597 | s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior; |
| 598 | } |
| 599 | |
| 600 | program->pts_wrap_reference = pts_wrap_reference; |
| 601 | program->pts_wrap_behavior = pts_wrap_behavior; |
| 602 | } |
| 603 | program = av_find_program_from_stream(s, program, stream_index); |
| 604 | } |
| 605 | } |
| 606 | return 1; |
| 607 | } |
| 608 | |
| 609 | int ff_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 610 | { |
| 611 | int ret, i, err; |
| 612 | AVStream *st; |
| 613 | |
| 614 | for (;;) { |
| 615 | AVPacketList *pktl = s->raw_packet_buffer; |
| 616 | |
| 617 | if (pktl) { |
| 618 | *pkt = pktl->pkt; |
| 619 | st = s->streams[pkt->stream_index]; |
| 620 | if (s->raw_packet_buffer_remaining_size <= 0) |
| 621 | if ((err = probe_codec(s, st, NULL)) < 0) |
| 622 | return err; |
| 623 | if (st->request_probe <= 0) { |
| 624 | s->raw_packet_buffer = pktl->next; |
| 625 | s->raw_packet_buffer_remaining_size += pkt->size; |
| 626 | av_free(pktl); |
| 627 | return 0; |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | pkt->data = NULL; |
| 632 | pkt->size = 0; |
| 633 | av_init_packet(pkt); |
| 634 | ret = s->iformat->read_packet(s, pkt); |
| 635 | if (ret < 0) { |
| 636 | if (!pktl || ret == AVERROR(EAGAIN)) |
| 637 | return ret; |
| 638 | for (i = 0; i < s->nb_streams; i++) { |
| 639 | st = s->streams[i]; |
| 640 | if (st->probe_packets) |
| 641 | if ((err = probe_codec(s, st, NULL)) < 0) |
| 642 | return err; |
| 643 | av_assert0(st->request_probe <= 0); |
| 644 | } |
| 645 | continue; |
| 646 | } |
| 647 | |
| 648 | if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) && |
| 649 | (pkt->flags & AV_PKT_FLAG_CORRUPT)) { |
| 650 | av_log(s, AV_LOG_WARNING, |
| 651 | "Dropped corrupted packet (stream = %d)\n", |
| 652 | pkt->stream_index); |
| 653 | av_free_packet(pkt); |
| 654 | continue; |
| 655 | } |
| 656 | |
| 657 | if (pkt->stream_index >= (unsigned)s->nb_streams) { |
| 658 | av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index); |
| 659 | continue; |
| 660 | } |
| 661 | |
| 662 | st = s->streams[pkt->stream_index]; |
| 663 | |
| 664 | if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) { |
| 665 | // correct first time stamps to negative values |
| 666 | if (!is_relative(st->first_dts)) |
| 667 | st->first_dts = wrap_timestamp(st, st->first_dts); |
| 668 | if (!is_relative(st->start_time)) |
| 669 | st->start_time = wrap_timestamp(st, st->start_time); |
| 670 | if (!is_relative(st->cur_dts)) |
| 671 | st->cur_dts = wrap_timestamp(st, st->cur_dts); |
| 672 | } |
| 673 | |
| 674 | pkt->dts = wrap_timestamp(st, pkt->dts); |
| 675 | pkt->pts = wrap_timestamp(st, pkt->pts); |
| 676 | |
| 677 | force_codec_ids(s, st); |
| 678 | |
| 679 | /* TODO: audio: time filter; video: frame reordering (pts != dts) */ |
| 680 | if (s->use_wallclock_as_timestamps) |
| 681 | pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base); |
| 682 | |
| 683 | if (!pktl && st->request_probe <= 0) |
| 684 | return ret; |
| 685 | |
| 686 | add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
| 687 | s->raw_packet_buffer_remaining_size -= pkt->size; |
| 688 | |
| 689 | if ((err = probe_codec(s, st, pkt)) < 0) |
| 690 | return err; |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | #if FF_API_READ_PACKET |
| 695 | int av_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 696 | { |
| 697 | return ff_read_packet(s, pkt); |
| 698 | } |
| 699 | #endif |
| 700 | |
| 701 | |
| 702 | /**********************************************************/ |
| 703 | |
| 704 | static int determinable_frame_size(AVCodecContext *avctx) |
| 705 | { |
| 706 | if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/ |
| 707 | avctx->codec_id == AV_CODEC_ID_MP1 || |
| 708 | avctx->codec_id == AV_CODEC_ID_MP2 || |
| 709 | avctx->codec_id == AV_CODEC_ID_MP3/* || |
| 710 | avctx->codec_id == AV_CODEC_ID_CELT*/) |
| 711 | return 1; |
| 712 | return 0; |
| 713 | } |
| 714 | |
| 715 | /** |
| 716 | * Return the frame duration in seconds. Return 0 if not available. |
| 717 | */ |
| 718 | void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st, |
| 719 | AVCodecParserContext *pc, AVPacket *pkt) |
| 720 | { |
| 721 | int frame_size; |
| 722 | |
| 723 | *pnum = 0; |
| 724 | *pden = 0; |
| 725 | switch (st->codec->codec_type) { |
| 726 | case AVMEDIA_TYPE_VIDEO: |
| 727 | if (st->r_frame_rate.num && !pc) { |
| 728 | *pnum = st->r_frame_rate.den; |
| 729 | *pden = st->r_frame_rate.num; |
| 730 | } else if (st->time_base.num * 1000LL > st->time_base.den) { |
| 731 | *pnum = st->time_base.num; |
| 732 | *pden = st->time_base.den; |
| 733 | } else if (st->codec->time_base.num * 1000LL > st->codec->time_base.den) { |
| 734 | *pnum = st->codec->time_base.num; |
| 735 | *pden = st->codec->time_base.den; |
| 736 | if (pc && pc->repeat_pict) { |
| 737 | if (*pnum > INT_MAX / (1 + pc->repeat_pict)) |
| 738 | *pden /= 1 + pc->repeat_pict; |
| 739 | else |
| 740 | *pnum *= 1 + pc->repeat_pict; |
| 741 | } |
| 742 | /* If this codec can be interlaced or progressive then we need |
| 743 | * a parser to compute duration of a packet. Thus if we have |
| 744 | * no parser in such case leave duration undefined. */ |
| 745 | if (st->codec->ticks_per_frame > 1 && !pc) |
| 746 | *pnum = *pden = 0; |
| 747 | } |
| 748 | break; |
| 749 | case AVMEDIA_TYPE_AUDIO: |
| 750 | frame_size = av_get_audio_frame_duration(st->codec, pkt->size); |
| 751 | if (frame_size <= 0 || st->codec->sample_rate <= 0) |
| 752 | break; |
| 753 | *pnum = frame_size; |
| 754 | *pden = st->codec->sample_rate; |
| 755 | break; |
| 756 | default: |
| 757 | break; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | static int is_intra_only(AVCodecContext *enc) { |
| 762 | const AVCodecDescriptor *desc; |
| 763 | |
| 764 | if (enc->codec_type != AVMEDIA_TYPE_VIDEO) |
| 765 | return 1; |
| 766 | |
| 767 | desc = av_codec_get_codec_descriptor(enc); |
| 768 | if (!desc) { |
| 769 | desc = avcodec_descriptor_get(enc->codec_id); |
| 770 | av_codec_set_codec_descriptor(enc, desc); |
| 771 | } |
| 772 | if (desc) |
| 773 | return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY); |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | static int has_decode_delay_been_guessed(AVStream *st) |
| 778 | { |
| 779 | if (st->codec->codec_id != AV_CODEC_ID_H264) return 1; |
| 780 | if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy |
| 781 | return 1; |
| 782 | #if CONFIG_H264_DECODER |
| 783 | if (st->codec->has_b_frames && |
| 784 | avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames) |
| 785 | return 1; |
| 786 | #endif |
| 787 | if (st->codec->has_b_frames<3) |
| 788 | return st->nb_decoded_frames >= 7; |
| 789 | else if (st->codec->has_b_frames<4) |
| 790 | return st->nb_decoded_frames >= 18; |
| 791 | else |
| 792 | return st->nb_decoded_frames >= 20; |
| 793 | } |
| 794 | |
| 795 | static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl) |
| 796 | { |
| 797 | if (pktl->next) |
| 798 | return pktl->next; |
| 799 | if (pktl == s->packet_buffer_end) |
| 800 | return s->parse_queue; |
| 801 | return NULL; |
| 802 | } |
| 803 | |
| 804 | static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) { |
| 805 | int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && |
| 806 | st->codec->codec_id != AV_CODEC_ID_HEVC; |
| 807 | |
| 808 | if(!onein_oneout) { |
| 809 | int delay = st->codec->has_b_frames; |
| 810 | int i; |
| 811 | |
| 812 | if (dts == AV_NOPTS_VALUE) { |
| 813 | int64_t best_score = INT64_MAX; |
| 814 | for (i = 0; i<delay; i++) { |
| 815 | if (st->pts_reorder_error_count[i]) { |
| 816 | int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i]; |
| 817 | if (score < best_score) { |
| 818 | best_score = score; |
| 819 | dts = pts_buffer[i]; |
| 820 | } |
| 821 | } |
| 822 | } |
| 823 | } else { |
| 824 | for (i = 0; i<delay; i++) { |
| 825 | if (pts_buffer[i] != AV_NOPTS_VALUE) { |
| 826 | int64_t diff = FFABS(pts_buffer[i] - dts) |
| 827 | + (uint64_t)st->pts_reorder_error[i]; |
| 828 | diff = FFMAX(diff, st->pts_reorder_error[i]); |
| 829 | st->pts_reorder_error[i] = diff; |
| 830 | st->pts_reorder_error_count[i]++; |
| 831 | if (st->pts_reorder_error_count[i] > 250) { |
| 832 | st->pts_reorder_error[i] >>= 1; |
| 833 | st->pts_reorder_error_count[i] >>= 1; |
| 834 | } |
| 835 | } |
| 836 | } |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | if (dts == AV_NOPTS_VALUE) |
| 841 | dts = pts_buffer[0]; |
| 842 | |
| 843 | return dts; |
| 844 | } |
| 845 | |
| 846 | static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
| 847 | int64_t dts, int64_t pts, AVPacket *pkt) |
| 848 | { |
| 849 | AVStream *st = s->streams[stream_index]; |
| 850 | AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; |
| 851 | int64_t pts_buffer[MAX_REORDER_DELAY+1]; |
| 852 | int64_t shift; |
| 853 | int i, delay; |
| 854 | |
| 855 | if (st->first_dts != AV_NOPTS_VALUE || |
| 856 | dts == AV_NOPTS_VALUE || |
| 857 | st->cur_dts == AV_NOPTS_VALUE || |
| 858 | is_relative(dts)) |
| 859 | return; |
| 860 | |
| 861 | delay = st->codec->has_b_frames; |
| 862 | st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE); |
| 863 | st->cur_dts = dts; |
| 864 | shift = st->first_dts - RELATIVE_TS_BASE; |
| 865 | |
| 866 | for (i = 0; i<MAX_REORDER_DELAY+1; i++) |
| 867 | pts_buffer[i] = AV_NOPTS_VALUE; |
| 868 | |
| 869 | if (is_relative(pts)) |
| 870 | pts += shift; |
| 871 | |
| 872 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { |
| 873 | if (pktl->pkt.stream_index != stream_index) |
| 874 | continue; |
| 875 | if (is_relative(pktl->pkt.pts)) |
| 876 | pktl->pkt.pts += shift; |
| 877 | |
| 878 | if (is_relative(pktl->pkt.dts)) |
| 879 | pktl->pkt.dts += shift; |
| 880 | |
| 881 | if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE) |
| 882 | st->start_time = pktl->pkt.pts; |
| 883 | |
| 884 | if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) { |
| 885 | pts_buffer[0] = pktl->pkt.pts; |
| 886 | for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++) |
| 887 | FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]); |
| 888 | |
| 889 | pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts); |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | if (st->start_time == AV_NOPTS_VALUE) |
| 894 | st->start_time = pts; |
| 895 | } |
| 896 | |
| 897 | static void update_initial_durations(AVFormatContext *s, AVStream *st, |
| 898 | int stream_index, int duration) |
| 899 | { |
| 900 | AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; |
| 901 | int64_t cur_dts = RELATIVE_TS_BASE; |
| 902 | |
| 903 | if (st->first_dts != AV_NOPTS_VALUE) { |
| 904 | if (st->update_initial_durations_done) |
| 905 | return; |
| 906 | st->update_initial_durations_done = 1; |
| 907 | cur_dts = st->first_dts; |
| 908 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { |
| 909 | if (pktl->pkt.stream_index == stream_index) { |
| 910 | if (pktl->pkt.pts != pktl->pkt.dts || |
| 911 | pktl->pkt.dts != AV_NOPTS_VALUE || |
| 912 | pktl->pkt.duration) |
| 913 | break; |
| 914 | cur_dts -= duration; |
| 915 | } |
| 916 | } |
| 917 | if (pktl && pktl->pkt.dts != st->first_dts) { |
| 918 | av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %d) in the queue\n", |
| 919 | av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration); |
| 920 | return; |
| 921 | } |
| 922 | if (!pktl) { |
| 923 | av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts)); |
| 924 | return; |
| 925 | } |
| 926 | pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; |
| 927 | st->first_dts = cur_dts; |
| 928 | } else if (st->cur_dts != RELATIVE_TS_BASE) |
| 929 | return; |
| 930 | |
| 931 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { |
| 932 | if (pktl->pkt.stream_index != stream_index) |
| 933 | continue; |
| 934 | if (pktl->pkt.pts == pktl->pkt.dts && |
| 935 | (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) && |
| 936 | !pktl->pkt.duration) { |
| 937 | pktl->pkt.dts = cur_dts; |
| 938 | if (!st->codec->has_b_frames) |
| 939 | pktl->pkt.pts = cur_dts; |
| 940 | // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) |
| 941 | pktl->pkt.duration = duration; |
| 942 | } else |
| 943 | break; |
| 944 | cur_dts = pktl->pkt.dts + pktl->pkt.duration; |
| 945 | } |
| 946 | if (!pktl) |
| 947 | st->cur_dts = cur_dts; |
| 948 | } |
| 949 | |
| 950 | static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
| 951 | AVCodecParserContext *pc, AVPacket *pkt) |
| 952 | { |
| 953 | int num, den, presentation_delayed, delay, i; |
| 954 | int64_t offset; |
| 955 | AVRational duration; |
| 956 | int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && |
| 957 | st->codec->codec_id != AV_CODEC_ID_HEVC; |
| 958 | |
| 959 | if (s->flags & AVFMT_FLAG_NOFILLIN) |
| 960 | return; |
| 961 | |
| 962 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) { |
| 963 | if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) { |
| 964 | if (st->last_dts_for_order_check <= pkt->dts) { |
| 965 | st->dts_ordered++; |
| 966 | } else { |
| 967 | av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING, |
| 968 | "DTS %"PRIi64" < %"PRIi64" out of order\n", |
| 969 | pkt->dts, |
| 970 | st->last_dts_for_order_check); |
| 971 | st->dts_misordered++; |
| 972 | } |
| 973 | if (st->dts_ordered + st->dts_misordered > 250) { |
| 974 | st->dts_ordered >>= 1; |
| 975 | st->dts_misordered >>= 1; |
| 976 | } |
| 977 | } |
| 978 | |
| 979 | st->last_dts_for_order_check = pkt->dts; |
| 980 | if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts) |
| 981 | pkt->dts = AV_NOPTS_VALUE; |
| 982 | } |
| 983 | |
| 984 | if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE) |
| 985 | pkt->dts = AV_NOPTS_VALUE; |
| 986 | |
| 987 | if (pc && pc->pict_type == AV_PICTURE_TYPE_B |
| 988 | && !st->codec->has_b_frames) |
| 989 | //FIXME Set low_delay = 0 when has_b_frames = 1 |
| 990 | st->codec->has_b_frames = 1; |
| 991 | |
| 992 | /* do we have a video B-frame ? */ |
| 993 | delay = st->codec->has_b_frames; |
| 994 | presentation_delayed = 0; |
| 995 | |
| 996 | /* XXX: need has_b_frame, but cannot get it if the codec is |
| 997 | * not initialized */ |
| 998 | if (delay && |
| 999 | pc && pc->pict_type != AV_PICTURE_TYPE_B) |
| 1000 | presentation_delayed = 1; |
| 1001 | |
| 1002 | if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && |
| 1003 | st->pts_wrap_bits < 63 && |
| 1004 | pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) { |
| 1005 | if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) { |
| 1006 | pkt->dts -= 1LL << st->pts_wrap_bits; |
| 1007 | } else |
| 1008 | pkt->pts += 1LL << st->pts_wrap_bits; |
| 1009 | } |
| 1010 | |
| 1011 | /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg). |
| 1012 | * We take the conservative approach and discard both. |
| 1013 | * Note: If this is misbehaving for an H.264 file, then possibly |
| 1014 | * presentation_delayed is not set correctly. */ |
| 1015 | if (delay == 1 && pkt->dts == pkt->pts && |
| 1016 | pkt->dts != AV_NOPTS_VALUE && presentation_delayed) { |
| 1017 | av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts); |
| 1018 | if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2") |
| 1019 | && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism |
| 1020 | pkt->dts = AV_NOPTS_VALUE; |
| 1021 | } |
| 1022 | |
| 1023 | duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base); |
| 1024 | if (pkt->duration == 0) { |
| 1025 | ff_compute_frame_duration(&num, &den, st, pc, pkt); |
| 1026 | if (den && num) { |
| 1027 | duration = (AVRational) {num, den}; |
| 1028 | pkt->duration = av_rescale_rnd(1, |
| 1029 | num * (int64_t) st->time_base.den, |
| 1030 | den * (int64_t) st->time_base.num, |
| 1031 | AV_ROUND_DOWN); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue)) |
| 1036 | update_initial_durations(s, st, pkt->stream_index, pkt->duration); |
| 1037 | |
| 1038 | /* Correct timestamps with byte offset if demuxers only have timestamps |
| 1039 | * on packet boundaries */ |
| 1040 | if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) { |
| 1041 | /* this will estimate bitrate based on this frame's duration and size */ |
| 1042 | offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
| 1043 | if (pkt->pts != AV_NOPTS_VALUE) |
| 1044 | pkt->pts += offset; |
| 1045 | if (pkt->dts != AV_NOPTS_VALUE) |
| 1046 | pkt->dts += offset; |
| 1047 | } |
| 1048 | |
| 1049 | /* This may be redundant, but it should not hurt. */ |
| 1050 | if (pkt->dts != AV_NOPTS_VALUE && |
| 1051 | pkt->pts != AV_NOPTS_VALUE && |
| 1052 | pkt->pts > pkt->dts) |
| 1053 | presentation_delayed = 1; |
| 1054 | |
| 1055 | av_dlog(NULL, |
| 1056 | "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n", |
| 1057 | presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), |
| 1058 | pkt->stream_index, pc, pkt->duration); |
| 1059 | /* Interpolate PTS and DTS if they are not present. We skip H264 |
| 1060 | * currently because delay and has_b_frames are not reliably set. */ |
| 1061 | if ((delay == 0 || (delay == 1 && pc)) && |
| 1062 | onein_oneout) { |
| 1063 | if (presentation_delayed) { |
| 1064 | /* DTS = decompression timestamp */ |
| 1065 | /* PTS = presentation timestamp */ |
| 1066 | if (pkt->dts == AV_NOPTS_VALUE) |
| 1067 | pkt->dts = st->last_IP_pts; |
| 1068 | update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); |
| 1069 | if (pkt->dts == AV_NOPTS_VALUE) |
| 1070 | pkt->dts = st->cur_dts; |
| 1071 | |
| 1072 | /* This is tricky: the dts must be incremented by the duration |
| 1073 | * of the frame we are displaying, i.e. the last I- or P-frame. */ |
| 1074 | if (st->last_IP_duration == 0) |
| 1075 | st->last_IP_duration = pkt->duration; |
| 1076 | if (pkt->dts != AV_NOPTS_VALUE) |
| 1077 | st->cur_dts = pkt->dts + st->last_IP_duration; |
| 1078 | st->last_IP_duration = pkt->duration; |
| 1079 | st->last_IP_pts = pkt->pts; |
| 1080 | /* Cannot compute PTS if not present (we can compute it only |
| 1081 | * by knowing the future. */ |
| 1082 | } else if (pkt->pts != AV_NOPTS_VALUE || |
| 1083 | pkt->dts != AV_NOPTS_VALUE || |
| 1084 | pkt->duration ) { |
| 1085 | |
| 1086 | /* presentation is not delayed : PTS and DTS are the same */ |
| 1087 | if (pkt->pts == AV_NOPTS_VALUE) |
| 1088 | pkt->pts = pkt->dts; |
| 1089 | update_initial_timestamps(s, pkt->stream_index, pkt->pts, |
| 1090 | pkt->pts, pkt); |
| 1091 | if (pkt->pts == AV_NOPTS_VALUE) |
| 1092 | pkt->pts = st->cur_dts; |
| 1093 | pkt->dts = pkt->pts; |
| 1094 | if (pkt->pts != AV_NOPTS_VALUE) |
| 1095 | st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1); |
| 1096 | } |
| 1097 | } |
| 1098 | |
| 1099 | if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) { |
| 1100 | st->pts_buffer[0] = pkt->pts; |
| 1101 | for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++) |
| 1102 | FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]); |
| 1103 | |
| 1104 | pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts); |
| 1105 | } |
| 1106 | // We skipped it above so we try here. |
| 1107 | if (!onein_oneout) |
| 1108 | // This should happen on the first packet |
| 1109 | update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); |
| 1110 | if (pkt->dts > st->cur_dts) |
| 1111 | st->cur_dts = pkt->dts; |
| 1112 | |
| 1113 | av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n", |
| 1114 | presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts)); |
| 1115 | |
| 1116 | /* update flags */ |
| 1117 | if (is_intra_only(st->codec)) |
| 1118 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 1119 | if (pc) |
| 1120 | pkt->convergence_duration = pc->convergence_duration; |
| 1121 | } |
| 1122 | |
| 1123 | static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end) |
| 1124 | { |
| 1125 | while (*pkt_buf) { |
| 1126 | AVPacketList *pktl = *pkt_buf; |
| 1127 | *pkt_buf = pktl->next; |
| 1128 | av_free_packet(&pktl->pkt); |
| 1129 | av_freep(&pktl); |
| 1130 | } |
| 1131 | *pkt_buf_end = NULL; |
| 1132 | } |
| 1133 | |
| 1134 | /** |
| 1135 | * Parse a packet, add all split parts to parse_queue. |
| 1136 | * |
| 1137 | * @param pkt Packet to parse, NULL when flushing the parser at end of stream. |
| 1138 | */ |
| 1139 | static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index) |
| 1140 | { |
| 1141 | AVPacket out_pkt = { 0 }, flush_pkt = { 0 }; |
| 1142 | AVStream *st = s->streams[stream_index]; |
| 1143 | uint8_t *data = pkt ? pkt->data : NULL; |
| 1144 | int size = pkt ? pkt->size : 0; |
| 1145 | int ret = 0, got_output = 0; |
| 1146 | |
| 1147 | if (!pkt) { |
| 1148 | av_init_packet(&flush_pkt); |
| 1149 | pkt = &flush_pkt; |
| 1150 | got_output = 1; |
| 1151 | } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
| 1152 | // preserve 0-size sync packets |
| 1153 | compute_pkt_fields(s, st, st->parser, pkt); |
| 1154 | } |
| 1155 | |
| 1156 | while (size > 0 || (pkt == &flush_pkt && got_output)) { |
| 1157 | int len; |
| 1158 | |
| 1159 | av_init_packet(&out_pkt); |
| 1160 | len = av_parser_parse2(st->parser, st->codec, |
| 1161 | &out_pkt.data, &out_pkt.size, data, size, |
| 1162 | pkt->pts, pkt->dts, pkt->pos); |
| 1163 | |
| 1164 | pkt->pts = pkt->dts = AV_NOPTS_VALUE; |
| 1165 | pkt->pos = -1; |
| 1166 | /* increment read pointer */ |
| 1167 | data += len; |
| 1168 | size -= len; |
| 1169 | |
| 1170 | got_output = !!out_pkt.size; |
| 1171 | |
| 1172 | if (!out_pkt.size) |
| 1173 | continue; |
| 1174 | |
| 1175 | if (pkt->side_data) { |
| 1176 | out_pkt.side_data = pkt->side_data; |
| 1177 | out_pkt.side_data_elems = pkt->side_data_elems; |
| 1178 | pkt->side_data = NULL; |
| 1179 | pkt->side_data_elems = 0; |
| 1180 | } |
| 1181 | |
| 1182 | /* set the duration */ |
| 1183 | out_pkt.duration = 0; |
| 1184 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 1185 | if (st->codec->sample_rate > 0) { |
| 1186 | out_pkt.duration = |
| 1187 | av_rescale_q_rnd(st->parser->duration, |
| 1188 | (AVRational) { 1, st->codec->sample_rate }, |
| 1189 | st->time_base, |
| 1190 | AV_ROUND_DOWN); |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | out_pkt.stream_index = st->index; |
| 1195 | out_pkt.pts = st->parser->pts; |
| 1196 | out_pkt.dts = st->parser->dts; |
| 1197 | out_pkt.pos = st->parser->pos; |
| 1198 | |
| 1199 | if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) |
| 1200 | out_pkt.pos = st->parser->frame_offset; |
| 1201 | |
| 1202 | if (st->parser->key_frame == 1 || |
| 1203 | (st->parser->key_frame == -1 && |
| 1204 | st->parser->pict_type == AV_PICTURE_TYPE_I)) |
| 1205 | out_pkt.flags |= AV_PKT_FLAG_KEY; |
| 1206 | |
| 1207 | if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY)) |
| 1208 | out_pkt.flags |= AV_PKT_FLAG_KEY; |
| 1209 | |
| 1210 | compute_pkt_fields(s, st, st->parser, &out_pkt); |
| 1211 | |
| 1212 | if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) { |
| 1213 | out_pkt.buf = pkt->buf; |
| 1214 | pkt->buf = NULL; |
| 1215 | #if FF_API_DESTRUCT_PACKET |
| 1216 | FF_DISABLE_DEPRECATION_WARNINGS |
| 1217 | out_pkt.destruct = pkt->destruct; |
| 1218 | pkt->destruct = NULL; |
| 1219 | FF_ENABLE_DEPRECATION_WARNINGS |
| 1220 | #endif |
| 1221 | } |
| 1222 | if ((ret = av_dup_packet(&out_pkt)) < 0) |
| 1223 | goto fail; |
| 1224 | |
| 1225 | if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) { |
| 1226 | av_free_packet(&out_pkt); |
| 1227 | ret = AVERROR(ENOMEM); |
| 1228 | goto fail; |
| 1229 | } |
| 1230 | } |
| 1231 | |
| 1232 | /* end of the stream => close and free the parser */ |
| 1233 | if (pkt == &flush_pkt) { |
| 1234 | av_parser_close(st->parser); |
| 1235 | st->parser = NULL; |
| 1236 | } |
| 1237 | |
| 1238 | fail: |
| 1239 | av_free_packet(pkt); |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
| 1243 | static int read_from_packet_buffer(AVPacketList **pkt_buffer, |
| 1244 | AVPacketList **pkt_buffer_end, |
| 1245 | AVPacket *pkt) |
| 1246 | { |
| 1247 | AVPacketList *pktl; |
| 1248 | av_assert0(*pkt_buffer); |
| 1249 | pktl = *pkt_buffer; |
| 1250 | *pkt = pktl->pkt; |
| 1251 | *pkt_buffer = pktl->next; |
| 1252 | if (!pktl->next) |
| 1253 | *pkt_buffer_end = NULL; |
| 1254 | av_freep(&pktl); |
| 1255 | return 0; |
| 1256 | } |
| 1257 | |
| 1258 | static int read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
| 1259 | { |
| 1260 | int ret = 0, i, got_packet = 0; |
| 1261 | AVDictionary *metadata = NULL; |
| 1262 | |
| 1263 | av_init_packet(pkt); |
| 1264 | |
| 1265 | while (!got_packet && !s->parse_queue) { |
| 1266 | AVStream *st; |
| 1267 | AVPacket cur_pkt; |
| 1268 | |
| 1269 | /* read next packet */ |
| 1270 | ret = ff_read_packet(s, &cur_pkt); |
| 1271 | if (ret < 0) { |
| 1272 | if (ret == AVERROR(EAGAIN)) |
| 1273 | return ret; |
| 1274 | /* flush the parsers */ |
| 1275 | for (i = 0; i < s->nb_streams; i++) { |
| 1276 | st = s->streams[i]; |
| 1277 | if (st->parser && st->need_parsing) |
| 1278 | parse_packet(s, NULL, st->index); |
| 1279 | } |
| 1280 | /* all remaining packets are now in parse_queue => |
| 1281 | * really terminate parsing */ |
| 1282 | break; |
| 1283 | } |
| 1284 | ret = 0; |
| 1285 | st = s->streams[cur_pkt.stream_index]; |
| 1286 | |
| 1287 | if (cur_pkt.pts != AV_NOPTS_VALUE && |
| 1288 | cur_pkt.dts != AV_NOPTS_VALUE && |
| 1289 | cur_pkt.pts < cur_pkt.dts) { |
| 1290 | av_log(s, AV_LOG_WARNING, |
| 1291 | "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n", |
| 1292 | cur_pkt.stream_index, |
| 1293 | av_ts2str(cur_pkt.pts), |
| 1294 | av_ts2str(cur_pkt.dts), |
| 1295 | cur_pkt.size); |
| 1296 | } |
| 1297 | if (s->debug & FF_FDEBUG_TS) |
| 1298 | av_log(s, AV_LOG_DEBUG, |
| 1299 | "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n", |
| 1300 | cur_pkt.stream_index, |
| 1301 | av_ts2str(cur_pkt.pts), |
| 1302 | av_ts2str(cur_pkt.dts), |
| 1303 | cur_pkt.size, cur_pkt.duration, cur_pkt.flags); |
| 1304 | |
| 1305 | if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) { |
| 1306 | st->parser = av_parser_init(st->codec->codec_id); |
| 1307 | if (!st->parser) { |
| 1308 | av_log(s, AV_LOG_VERBOSE, "parser not found for codec " |
| 1309 | "%s, packets or times may be invalid.\n", |
| 1310 | avcodec_get_name(st->codec->codec_id)); |
| 1311 | /* no parser available: just output the raw packets */ |
| 1312 | st->need_parsing = AVSTREAM_PARSE_NONE; |
| 1313 | } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS) |
| 1314 | st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| 1315 | else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) |
| 1316 | st->parser->flags |= PARSER_FLAG_ONCE; |
| 1317 | else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) |
| 1318 | st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; |
| 1319 | } |
| 1320 | |
| 1321 | if (!st->need_parsing || !st->parser) { |
| 1322 | /* no parsing needed: we just output the packet as is */ |
| 1323 | *pkt = cur_pkt; |
| 1324 | compute_pkt_fields(s, st, NULL, pkt); |
| 1325 | if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && |
| 1326 | (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) { |
| 1327 | ff_reduce_index(s, st->index); |
| 1328 | av_add_index_entry(st, pkt->pos, pkt->dts, |
| 1329 | 0, 0, AVINDEX_KEYFRAME); |
| 1330 | } |
| 1331 | got_packet = 1; |
| 1332 | } else if (st->discard < AVDISCARD_ALL) { |
| 1333 | if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0) |
| 1334 | return ret; |
| 1335 | } else { |
| 1336 | /* free packet */ |
| 1337 | av_free_packet(&cur_pkt); |
| 1338 | } |
| 1339 | if (pkt->flags & AV_PKT_FLAG_KEY) |
| 1340 | st->skip_to_keyframe = 0; |
| 1341 | if (st->skip_to_keyframe) { |
| 1342 | av_free_packet(&cur_pkt); |
| 1343 | if (got_packet) { |
| 1344 | *pkt = cur_pkt; |
| 1345 | } |
| 1346 | got_packet = 0; |
| 1347 | } |
| 1348 | } |
| 1349 | |
| 1350 | if (!got_packet && s->parse_queue) |
| 1351 | ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt); |
| 1352 | |
| 1353 | if (ret >= 0) { |
| 1354 | AVStream *st = s->streams[pkt->stream_index]; |
| 1355 | if (st->skip_samples) { |
| 1356 | uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10); |
| 1357 | if (p) { |
| 1358 | AV_WL32(p, st->skip_samples); |
| 1359 | av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples); |
| 1360 | } |
| 1361 | st->skip_samples = 0; |
| 1362 | } |
| 1363 | |
| 1364 | if (st->inject_global_side_data) { |
| 1365 | for (i = 0; i < st->nb_side_data; i++) { |
| 1366 | AVPacketSideData *src_sd = &st->side_data[i]; |
| 1367 | uint8_t *dst_data; |
| 1368 | |
| 1369 | if (av_packet_get_side_data(pkt, src_sd->type, NULL)) |
| 1370 | continue; |
| 1371 | |
| 1372 | dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size); |
| 1373 | if (!dst_data) { |
| 1374 | av_log(s, AV_LOG_WARNING, "Could not inject global side data\n"); |
| 1375 | continue; |
| 1376 | } |
| 1377 | |
| 1378 | memcpy(dst_data, src_sd->data, src_sd->size); |
| 1379 | } |
| 1380 | st->inject_global_side_data = 0; |
| 1381 | } |
| 1382 | |
| 1383 | if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA)) |
| 1384 | av_packet_merge_side_data(pkt); |
| 1385 | } |
| 1386 | |
| 1387 | av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata); |
| 1388 | if (metadata) { |
| 1389 | s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED; |
| 1390 | av_dict_copy(&s->metadata, metadata, 0); |
| 1391 | av_dict_free(&metadata); |
| 1392 | av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN); |
| 1393 | } |
| 1394 | |
| 1395 | if (s->debug & FF_FDEBUG_TS) |
| 1396 | av_log(s, AV_LOG_DEBUG, |
| 1397 | "read_frame_internal stream=%d, pts=%s, dts=%s, " |
| 1398 | "size=%d, duration=%d, flags=%d\n", |
| 1399 | pkt->stream_index, |
| 1400 | av_ts2str(pkt->pts), |
| 1401 | av_ts2str(pkt->dts), |
| 1402 | pkt->size, pkt->duration, pkt->flags); |
| 1403 | |
| 1404 | return ret; |
| 1405 | } |
| 1406 | |
| 1407 | int av_read_frame(AVFormatContext *s, AVPacket *pkt) |
| 1408 | { |
| 1409 | const int genpts = s->flags & AVFMT_FLAG_GENPTS; |
| 1410 | int eof = 0; |
| 1411 | int ret; |
| 1412 | AVStream *st; |
| 1413 | |
| 1414 | if (!genpts) { |
| 1415 | ret = s->packet_buffer |
| 1416 | ? read_from_packet_buffer(&s->packet_buffer, |
| 1417 | &s->packet_buffer_end, pkt) |
| 1418 | : read_frame_internal(s, pkt); |
| 1419 | if (ret < 0) |
| 1420 | return ret; |
| 1421 | goto return_packet; |
| 1422 | } |
| 1423 | |
| 1424 | for (;;) { |
| 1425 | AVPacketList *pktl = s->packet_buffer; |
| 1426 | |
| 1427 | if (pktl) { |
| 1428 | AVPacket *next_pkt = &pktl->pkt; |
| 1429 | |
| 1430 | if (next_pkt->dts != AV_NOPTS_VALUE) { |
| 1431 | int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits; |
| 1432 | // last dts seen for this stream. if any of packets following |
| 1433 | // current one had no dts, we will set this to AV_NOPTS_VALUE. |
| 1434 | int64_t last_dts = next_pkt->dts; |
| 1435 | while (pktl && next_pkt->pts == AV_NOPTS_VALUE) { |
| 1436 | if (pktl->pkt.stream_index == next_pkt->stream_index && |
| 1437 | (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) { |
| 1438 | if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { |
| 1439 | // not B-frame |
| 1440 | next_pkt->pts = pktl->pkt.dts; |
| 1441 | } |
| 1442 | if (last_dts != AV_NOPTS_VALUE) { |
| 1443 | // Once last dts was set to AV_NOPTS_VALUE, we don't change it. |
| 1444 | last_dts = pktl->pkt.dts; |
| 1445 | } |
| 1446 | } |
| 1447 | pktl = pktl->next; |
| 1448 | } |
| 1449 | if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) { |
| 1450 | // Fixing the last reference frame had none pts issue (For MXF etc). |
| 1451 | // We only do this when |
| 1452 | // 1. eof. |
| 1453 | // 2. we are not able to resolve a pts value for current packet. |
| 1454 | // 3. the packets for this stream at the end of the files had valid dts. |
| 1455 | next_pkt->pts = last_dts + next_pkt->duration; |
| 1456 | } |
| 1457 | pktl = s->packet_buffer; |
| 1458 | } |
| 1459 | |
| 1460 | /* read packet from packet buffer, if there is data */ |
| 1461 | st = s->streams[next_pkt->stream_index]; |
| 1462 | if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL && |
| 1463 | next_pkt->dts != AV_NOPTS_VALUE && !eof)) { |
| 1464 | ret = read_from_packet_buffer(&s->packet_buffer, |
| 1465 | &s->packet_buffer_end, pkt); |
| 1466 | goto return_packet; |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | ret = read_frame_internal(s, pkt); |
| 1471 | if (ret < 0) { |
| 1472 | if (pktl && ret != AVERROR(EAGAIN)) { |
| 1473 | eof = 1; |
| 1474 | continue; |
| 1475 | } else |
| 1476 | return ret; |
| 1477 | } |
| 1478 | |
| 1479 | if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt, |
| 1480 | &s->packet_buffer_end)) < 0) |
| 1481 | return AVERROR(ENOMEM); |
| 1482 | } |
| 1483 | |
| 1484 | return_packet: |
| 1485 | |
| 1486 | st = s->streams[pkt->stream_index]; |
| 1487 | if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) { |
| 1488 | ff_reduce_index(s, st->index); |
| 1489 | av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); |
| 1490 | } |
| 1491 | |
| 1492 | if (is_relative(pkt->dts)) |
| 1493 | pkt->dts -= RELATIVE_TS_BASE; |
| 1494 | if (is_relative(pkt->pts)) |
| 1495 | pkt->pts -= RELATIVE_TS_BASE; |
| 1496 | |
| 1497 | return ret; |
| 1498 | } |
| 1499 | |
| 1500 | /* XXX: suppress the packet queue */ |
| 1501 | static void flush_packet_queue(AVFormatContext *s) |
| 1502 | { |
| 1503 | free_packet_buffer(&s->parse_queue, &s->parse_queue_end); |
| 1504 | free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end); |
| 1505 | free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end); |
| 1506 | |
| 1507 | s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
| 1508 | } |
| 1509 | |
| 1510 | /*******************************************************/ |
| 1511 | /* seek support */ |
| 1512 | |
| 1513 | int av_find_default_stream_index(AVFormatContext *s) |
| 1514 | { |
| 1515 | int i; |
| 1516 | AVStream *st; |
| 1517 | int best_stream = 0; |
| 1518 | int best_score = -1; |
| 1519 | |
| 1520 | if (s->nb_streams <= 0) |
| 1521 | return -1; |
| 1522 | for (i = 0; i < s->nb_streams; i++) { |
| 1523 | int score = 0; |
| 1524 | st = s->streams[i]; |
| 1525 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
| 1526 | !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) { |
| 1527 | if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames) |
| 1528 | score += 25; |
| 1529 | else |
| 1530 | score += 100; |
| 1531 | } |
| 1532 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 1533 | if (!st->codec->sample_rate && !st->codec_info_nb_frames) |
| 1534 | score += 12; |
| 1535 | else |
| 1536 | score += 50; |
| 1537 | } |
| 1538 | |
| 1539 | if (score > best_score) { |
| 1540 | best_score = score; |
| 1541 | best_stream = i; |
| 1542 | } |
| 1543 | } |
| 1544 | return best_stream; |
| 1545 | } |
| 1546 | |
| 1547 | /** Flush the frame reader. */ |
| 1548 | void ff_read_frame_flush(AVFormatContext *s) |
| 1549 | { |
| 1550 | AVStream *st; |
| 1551 | int i, j; |
| 1552 | |
| 1553 | flush_packet_queue(s); |
| 1554 | |
| 1555 | /* Reset read state for each stream. */ |
| 1556 | for (i = 0; i < s->nb_streams; i++) { |
| 1557 | st = s->streams[i]; |
| 1558 | |
| 1559 | if (st->parser) { |
| 1560 | av_parser_close(st->parser); |
| 1561 | st->parser = NULL; |
| 1562 | } |
| 1563 | st->last_IP_pts = AV_NOPTS_VALUE; |
| 1564 | st->last_dts_for_order_check = AV_NOPTS_VALUE; |
| 1565 | if (st->first_dts == AV_NOPTS_VALUE) |
| 1566 | st->cur_dts = RELATIVE_TS_BASE; |
| 1567 | else |
| 1568 | /* We set the current DTS to an unspecified origin. */ |
| 1569 | st->cur_dts = AV_NOPTS_VALUE; |
| 1570 | |
| 1571 | st->probe_packets = MAX_PROBE_PACKETS; |
| 1572 | |
| 1573 | for (j = 0; j < MAX_REORDER_DELAY + 1; j++) |
| 1574 | st->pts_buffer[j] = AV_NOPTS_VALUE; |
| 1575 | |
| 1576 | if (s->internal->inject_global_side_data) |
| 1577 | st->inject_global_side_data = 1; |
| 1578 | } |
| 1579 | } |
| 1580 | |
| 1581 | void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp) |
| 1582 | { |
| 1583 | int i; |
| 1584 | |
| 1585 | for (i = 0; i < s->nb_streams; i++) { |
| 1586 | AVStream *st = s->streams[i]; |
| 1587 | |
| 1588 | st->cur_dts = |
| 1589 | av_rescale(timestamp, |
| 1590 | st->time_base.den * (int64_t) ref_st->time_base.num, |
| 1591 | st->time_base.num * (int64_t) ref_st->time_base.den); |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | void ff_reduce_index(AVFormatContext *s, int stream_index) |
| 1596 | { |
| 1597 | AVStream *st = s->streams[stream_index]; |
| 1598 | unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry); |
| 1599 | |
| 1600 | if ((unsigned) st->nb_index_entries >= max_entries) { |
| 1601 | int i; |
| 1602 | for (i = 0; 2 * i < st->nb_index_entries; i++) |
| 1603 | st->index_entries[i] = st->index_entries[2 * i]; |
| 1604 | st->nb_index_entries = i; |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | int ff_add_index_entry(AVIndexEntry **index_entries, |
| 1609 | int *nb_index_entries, |
| 1610 | unsigned int *index_entries_allocated_size, |
| 1611 | int64_t pos, int64_t timestamp, |
| 1612 | int size, int distance, int flags) |
| 1613 | { |
| 1614 | AVIndexEntry *entries, *ie; |
| 1615 | int index; |
| 1616 | |
| 1617 | if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
| 1618 | return -1; |
| 1619 | |
| 1620 | if (timestamp == AV_NOPTS_VALUE) |
| 1621 | return AVERROR(EINVAL); |
| 1622 | |
| 1623 | if (size < 0 || size > 0x3FFFFFFF) |
| 1624 | return AVERROR(EINVAL); |
| 1625 | |
| 1626 | if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known |
| 1627 | timestamp -= RELATIVE_TS_BASE; |
| 1628 | |
| 1629 | entries = av_fast_realloc(*index_entries, |
| 1630 | index_entries_allocated_size, |
| 1631 | (*nb_index_entries + 1) * |
| 1632 | sizeof(AVIndexEntry)); |
| 1633 | if (!entries) |
| 1634 | return -1; |
| 1635 | |
| 1636 | *index_entries = entries; |
| 1637 | |
| 1638 | index = ff_index_search_timestamp(*index_entries, *nb_index_entries, |
| 1639 | timestamp, AVSEEK_FLAG_ANY); |
| 1640 | |
| 1641 | if (index < 0) { |
| 1642 | index = (*nb_index_entries)++; |
| 1643 | ie = &entries[index]; |
| 1644 | av_assert0(index == 0 || ie[-1].timestamp < timestamp); |
| 1645 | } else { |
| 1646 | ie = &entries[index]; |
| 1647 | if (ie->timestamp != timestamp) { |
| 1648 | if (ie->timestamp <= timestamp) |
| 1649 | return -1; |
| 1650 | memmove(entries + index + 1, entries + index, |
| 1651 | sizeof(AVIndexEntry) * (*nb_index_entries - index)); |
| 1652 | (*nb_index_entries)++; |
| 1653 | } else if (ie->pos == pos && distance < ie->min_distance) |
| 1654 | // do not reduce the distance |
| 1655 | distance = ie->min_distance; |
| 1656 | } |
| 1657 | |
| 1658 | ie->pos = pos; |
| 1659 | ie->timestamp = timestamp; |
| 1660 | ie->min_distance = distance; |
| 1661 | ie->size = size; |
| 1662 | ie->flags = flags; |
| 1663 | |
| 1664 | return index; |
| 1665 | } |
| 1666 | |
| 1667 | int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, |
| 1668 | int size, int distance, int flags) |
| 1669 | { |
| 1670 | timestamp = wrap_timestamp(st, timestamp); |
| 1671 | return ff_add_index_entry(&st->index_entries, &st->nb_index_entries, |
| 1672 | &st->index_entries_allocated_size, pos, |
| 1673 | timestamp, size, distance, flags); |
| 1674 | } |
| 1675 | |
| 1676 | int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, |
| 1677 | int64_t wanted_timestamp, int flags) |
| 1678 | { |
| 1679 | int a, b, m; |
| 1680 | int64_t timestamp; |
| 1681 | |
| 1682 | a = -1; |
| 1683 | b = nb_entries; |
| 1684 | |
| 1685 | // Optimize appending index entries at the end. |
| 1686 | if (b && entries[b - 1].timestamp < wanted_timestamp) |
| 1687 | a = b - 1; |
| 1688 | |
| 1689 | while (b - a > 1) { |
| 1690 | m = (a + b) >> 1; |
| 1691 | timestamp = entries[m].timestamp; |
| 1692 | if (timestamp >= wanted_timestamp) |
| 1693 | b = m; |
| 1694 | if (timestamp <= wanted_timestamp) |
| 1695 | a = m; |
| 1696 | } |
| 1697 | m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
| 1698 | |
| 1699 | if (!(flags & AVSEEK_FLAG_ANY)) |
| 1700 | while (m >= 0 && m < nb_entries && |
| 1701 | !(entries[m].flags & AVINDEX_KEYFRAME)) |
| 1702 | m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
| 1703 | |
| 1704 | if (m == nb_entries) |
| 1705 | return -1; |
| 1706 | return m; |
| 1707 | } |
| 1708 | |
| 1709 | int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags) |
| 1710 | { |
| 1711 | return ff_index_search_timestamp(st->index_entries, st->nb_index_entries, |
| 1712 | wanted_timestamp, flags); |
| 1713 | } |
| 1714 | |
| 1715 | static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, |
| 1716 | int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) |
| 1717 | { |
| 1718 | int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit); |
| 1719 | if (stream_index >= 0) |
| 1720 | ts = wrap_timestamp(s->streams[stream_index], ts); |
| 1721 | return ts; |
| 1722 | } |
| 1723 | |
| 1724 | int ff_seek_frame_binary(AVFormatContext *s, int stream_index, |
| 1725 | int64_t target_ts, int flags) |
| 1726 | { |
| 1727 | AVInputFormat *avif = s->iformat; |
| 1728 | int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit; |
| 1729 | int64_t ts_min, ts_max, ts; |
| 1730 | int index; |
| 1731 | int64_t ret; |
| 1732 | AVStream *st; |
| 1733 | |
| 1734 | if (stream_index < 0) |
| 1735 | return -1; |
| 1736 | |
| 1737 | av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts)); |
| 1738 | |
| 1739 | ts_max = |
| 1740 | ts_min = AV_NOPTS_VALUE; |
| 1741 | pos_limit = -1; // GCC falsely says it may be uninitialized. |
| 1742 | |
| 1743 | st = s->streams[stream_index]; |
| 1744 | if (st->index_entries) { |
| 1745 | AVIndexEntry *e; |
| 1746 | |
| 1747 | /* FIXME: Whole function must be checked for non-keyframe entries in |
| 1748 | * index case, especially read_timestamp(). */ |
| 1749 | index = av_index_search_timestamp(st, target_ts, |
| 1750 | flags | AVSEEK_FLAG_BACKWARD); |
| 1751 | index = FFMAX(index, 0); |
| 1752 | e = &st->index_entries[index]; |
| 1753 | |
| 1754 | if (e->timestamp <= target_ts || e->pos == e->min_distance) { |
| 1755 | pos_min = e->pos; |
| 1756 | ts_min = e->timestamp; |
| 1757 | av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n", |
| 1758 | pos_min, av_ts2str(ts_min)); |
| 1759 | } else { |
| 1760 | av_assert1(index == 0); |
| 1761 | } |
| 1762 | |
| 1763 | index = av_index_search_timestamp(st, target_ts, |
| 1764 | flags & ~AVSEEK_FLAG_BACKWARD); |
| 1765 | av_assert0(index < st->nb_index_entries); |
| 1766 | if (index >= 0) { |
| 1767 | e = &st->index_entries[index]; |
| 1768 | av_assert1(e->timestamp >= target_ts); |
| 1769 | pos_max = e->pos; |
| 1770 | ts_max = e->timestamp; |
| 1771 | pos_limit = pos_max - e->min_distance; |
| 1772 | av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64 |
| 1773 | " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max)); |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, |
| 1778 | ts_min, ts_max, flags, &ts, avif->read_timestamp); |
| 1779 | if (pos < 0) |
| 1780 | return -1; |
| 1781 | |
| 1782 | /* do the seek */ |
| 1783 | if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0) |
| 1784 | return ret; |
| 1785 | |
| 1786 | ff_read_frame_flush(s); |
| 1787 | ff_update_cur_dts(s, st, ts); |
| 1788 | |
| 1789 | return 0; |
| 1790 | } |
| 1791 | |
| 1792 | int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, |
| 1793 | int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) |
| 1794 | { |
| 1795 | int64_t step = 1024; |
| 1796 | int64_t limit, ts_max; |
| 1797 | int64_t filesize = avio_size(s->pb); |
| 1798 | int64_t pos_max = filesize - 1; |
| 1799 | do { |
| 1800 | limit = pos_max; |
| 1801 | pos_max = FFMAX(0, (pos_max) - step); |
| 1802 | ts_max = ff_read_timestamp(s, stream_index, |
| 1803 | &pos_max, limit, read_timestamp); |
| 1804 | step += step; |
| 1805 | } while (ts_max == AV_NOPTS_VALUE && 2*limit > step); |
| 1806 | if (ts_max == AV_NOPTS_VALUE) |
| 1807 | return -1; |
| 1808 | |
| 1809 | for (;;) { |
| 1810 | int64_t tmp_pos = pos_max + 1; |
| 1811 | int64_t tmp_ts = ff_read_timestamp(s, stream_index, |
| 1812 | &tmp_pos, INT64_MAX, read_timestamp); |
| 1813 | if (tmp_ts == AV_NOPTS_VALUE) |
| 1814 | break; |
| 1815 | av_assert0(tmp_pos > pos_max); |
| 1816 | ts_max = tmp_ts; |
| 1817 | pos_max = tmp_pos; |
| 1818 | if (tmp_pos >= filesize) |
| 1819 | break; |
| 1820 | } |
| 1821 | |
| 1822 | if (ts) |
| 1823 | *ts = ts_max; |
| 1824 | if (pos) |
| 1825 | *pos = pos_max; |
| 1826 | |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
| 1830 | int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, |
| 1831 | int64_t pos_min, int64_t pos_max, int64_t pos_limit, |
| 1832 | int64_t ts_min, int64_t ts_max, |
| 1833 | int flags, int64_t *ts_ret, |
| 1834 | int64_t (*read_timestamp)(struct AVFormatContext *, int, |
| 1835 | int64_t *, int64_t)) |
| 1836 | { |
| 1837 | int64_t pos, ts; |
| 1838 | int64_t start_pos; |
| 1839 | int no_change; |
| 1840 | int ret; |
| 1841 | |
| 1842 | av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts)); |
| 1843 | |
| 1844 | if (ts_min == AV_NOPTS_VALUE) { |
| 1845 | pos_min = s->data_offset; |
| 1846 | ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
| 1847 | if (ts_min == AV_NOPTS_VALUE) |
| 1848 | return -1; |
| 1849 | } |
| 1850 | |
| 1851 | if (ts_min >= target_ts) { |
| 1852 | *ts_ret = ts_min; |
| 1853 | return pos_min; |
| 1854 | } |
| 1855 | |
| 1856 | if (ts_max == AV_NOPTS_VALUE) { |
| 1857 | if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0) |
| 1858 | return ret; |
| 1859 | pos_limit = pos_max; |
| 1860 | } |
| 1861 | |
| 1862 | if (ts_max <= target_ts) { |
| 1863 | *ts_ret = ts_max; |
| 1864 | return pos_max; |
| 1865 | } |
| 1866 | |
| 1867 | if (ts_min > ts_max) |
| 1868 | return -1; |
| 1869 | else if (ts_min == ts_max) |
| 1870 | pos_limit = pos_min; |
| 1871 | |
| 1872 | no_change = 0; |
| 1873 | while (pos_min < pos_limit) { |
| 1874 | av_dlog(s, |
| 1875 | "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n", |
| 1876 | pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max)); |
| 1877 | assert(pos_limit <= pos_max); |
| 1878 | |
| 1879 | if (no_change == 0) { |
| 1880 | int64_t approximate_keyframe_distance = pos_max - pos_limit; |
| 1881 | // interpolate position (better than dichotomy) |
| 1882 | pos = av_rescale(target_ts - ts_min, pos_max - pos_min, |
| 1883 | ts_max - ts_min) + |
| 1884 | pos_min - approximate_keyframe_distance; |
| 1885 | } else if (no_change == 1) { |
| 1886 | // bisection if interpolation did not change min / max pos last time |
| 1887 | pos = (pos_min + pos_limit) >> 1; |
| 1888 | } else { |
| 1889 | /* linear search if bisection failed, can only happen if there |
| 1890 | * are very few or no keyframes between min/max */ |
| 1891 | pos = pos_min; |
| 1892 | } |
| 1893 | if (pos <= pos_min) |
| 1894 | pos = pos_min + 1; |
| 1895 | else if (pos > pos_limit) |
| 1896 | pos = pos_limit; |
| 1897 | start_pos = pos; |
| 1898 | |
| 1899 | // May pass pos_limit instead of -1. |
| 1900 | ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); |
| 1901 | if (pos == pos_max) |
| 1902 | no_change++; |
| 1903 | else |
| 1904 | no_change = 0; |
| 1905 | av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s" |
| 1906 | " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n", |
| 1907 | pos_min, pos, pos_max, |
| 1908 | av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts), |
| 1909 | pos_limit, start_pos, no_change); |
| 1910 | if (ts == AV_NOPTS_VALUE) { |
| 1911 | av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n"); |
| 1912 | return -1; |
| 1913 | } |
| 1914 | if (target_ts <= ts) { |
| 1915 | pos_limit = start_pos - 1; |
| 1916 | pos_max = pos; |
| 1917 | ts_max = ts; |
| 1918 | } |
| 1919 | if (target_ts >= ts) { |
| 1920 | pos_min = pos; |
| 1921 | ts_min = ts; |
| 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
| 1926 | ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
| 1927 | #if 0 |
| 1928 | pos_min = pos; |
| 1929 | ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
| 1930 | pos_min++; |
| 1931 | ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
| 1932 | av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n", |
| 1933 | pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max)); |
| 1934 | #endif |
| 1935 | *ts_ret = ts; |
| 1936 | return pos; |
| 1937 | } |
| 1938 | |
| 1939 | static int seek_frame_byte(AVFormatContext *s, int stream_index, |
| 1940 | int64_t pos, int flags) |
| 1941 | { |
| 1942 | int64_t pos_min, pos_max; |
| 1943 | |
| 1944 | pos_min = s->data_offset; |
| 1945 | pos_max = avio_size(s->pb) - 1; |
| 1946 | |
| 1947 | if (pos < pos_min) |
| 1948 | pos = pos_min; |
| 1949 | else if (pos > pos_max) |
| 1950 | pos = pos_max; |
| 1951 | |
| 1952 | avio_seek(s->pb, pos, SEEK_SET); |
| 1953 | |
| 1954 | s->io_repositioned = 1; |
| 1955 | |
| 1956 | return 0; |
| 1957 | } |
| 1958 | |
| 1959 | static int seek_frame_generic(AVFormatContext *s, int stream_index, |
| 1960 | int64_t timestamp, int flags) |
| 1961 | { |
| 1962 | int index; |
| 1963 | int64_t ret; |
| 1964 | AVStream *st; |
| 1965 | AVIndexEntry *ie; |
| 1966 | |
| 1967 | st = s->streams[stream_index]; |
| 1968 | |
| 1969 | index = av_index_search_timestamp(st, timestamp, flags); |
| 1970 | |
| 1971 | if (index < 0 && st->nb_index_entries && |
| 1972 | timestamp < st->index_entries[0].timestamp) |
| 1973 | return -1; |
| 1974 | |
| 1975 | if (index < 0 || index == st->nb_index_entries - 1) { |
| 1976 | AVPacket pkt; |
| 1977 | int nonkey = 0; |
| 1978 | |
| 1979 | if (st->nb_index_entries) { |
| 1980 | av_assert0(st->index_entries); |
| 1981 | ie = &st->index_entries[st->nb_index_entries - 1]; |
| 1982 | if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
| 1983 | return ret; |
| 1984 | ff_update_cur_dts(s, st, ie->timestamp); |
| 1985 | } else { |
| 1986 | if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0) |
| 1987 | return ret; |
| 1988 | } |
| 1989 | for (;;) { |
| 1990 | int read_status; |
| 1991 | do { |
| 1992 | read_status = av_read_frame(s, &pkt); |
| 1993 | } while (read_status == AVERROR(EAGAIN)); |
| 1994 | if (read_status < 0) |
| 1995 | break; |
| 1996 | av_free_packet(&pkt); |
| 1997 | if (stream_index == pkt.stream_index && pkt.dts > timestamp) { |
| 1998 | if (pkt.flags & AV_PKT_FLAG_KEY) |
| 1999 | break; |
| 2000 | if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) { |
| 2001 | av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey); |
| 2002 | break; |
| 2003 | } |
| 2004 | } |
| 2005 | } |
| 2006 | index = av_index_search_timestamp(st, timestamp, flags); |
| 2007 | } |
| 2008 | if (index < 0) |
| 2009 | return -1; |
| 2010 | |
| 2011 | ff_read_frame_flush(s); |
| 2012 | if (s->iformat->read_seek) |
| 2013 | if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
| 2014 | return 0; |
| 2015 | ie = &st->index_entries[index]; |
| 2016 | if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
| 2017 | return ret; |
| 2018 | ff_update_cur_dts(s, st, ie->timestamp); |
| 2019 | |
| 2020 | return 0; |
| 2021 | } |
| 2022 | |
| 2023 | static int seek_frame_internal(AVFormatContext *s, int stream_index, |
| 2024 | int64_t timestamp, int flags) |
| 2025 | { |
| 2026 | int ret; |
| 2027 | AVStream *st; |
| 2028 | |
| 2029 | if (flags & AVSEEK_FLAG_BYTE) { |
| 2030 | if (s->iformat->flags & AVFMT_NO_BYTE_SEEK) |
| 2031 | return -1; |
| 2032 | ff_read_frame_flush(s); |
| 2033 | return seek_frame_byte(s, stream_index, timestamp, flags); |
| 2034 | } |
| 2035 | |
| 2036 | if (stream_index < 0) { |
| 2037 | stream_index = av_find_default_stream_index(s); |
| 2038 | if (stream_index < 0) |
| 2039 | return -1; |
| 2040 | |
| 2041 | st = s->streams[stream_index]; |
| 2042 | /* timestamp for default must be expressed in AV_TIME_BASE units */ |
| 2043 | timestamp = av_rescale(timestamp, st->time_base.den, |
| 2044 | AV_TIME_BASE * (int64_t) st->time_base.num); |
| 2045 | } |
| 2046 | |
| 2047 | /* first, we try the format specific seek */ |
| 2048 | if (s->iformat->read_seek) { |
| 2049 | ff_read_frame_flush(s); |
| 2050 | ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
| 2051 | } else |
| 2052 | ret = -1; |
| 2053 | if (ret >= 0) |
| 2054 | return 0; |
| 2055 | |
| 2056 | if (s->iformat->read_timestamp && |
| 2057 | !(s->iformat->flags & AVFMT_NOBINSEARCH)) { |
| 2058 | ff_read_frame_flush(s); |
| 2059 | return ff_seek_frame_binary(s, stream_index, timestamp, flags); |
| 2060 | } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) { |
| 2061 | ff_read_frame_flush(s); |
| 2062 | return seek_frame_generic(s, stream_index, timestamp, flags); |
| 2063 | } else |
| 2064 | return -1; |
| 2065 | } |
| 2066 | |
| 2067 | int av_seek_frame(AVFormatContext *s, int stream_index, |
| 2068 | int64_t timestamp, int flags) |
| 2069 | { |
| 2070 | int ret; |
| 2071 | |
| 2072 | if (s->iformat->read_seek2 && !s->iformat->read_seek) { |
| 2073 | int64_t min_ts = INT64_MIN, max_ts = INT64_MAX; |
| 2074 | if ((flags & AVSEEK_FLAG_BACKWARD)) |
| 2075 | max_ts = timestamp; |
| 2076 | else |
| 2077 | min_ts = timestamp; |
| 2078 | return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts, |
| 2079 | flags & ~AVSEEK_FLAG_BACKWARD); |
| 2080 | } |
| 2081 | |
| 2082 | ret = seek_frame_internal(s, stream_index, timestamp, flags); |
| 2083 | |
| 2084 | if (ret >= 0) |
| 2085 | ret = avformat_queue_attached_pictures(s); |
| 2086 | |
| 2087 | return ret; |
| 2088 | } |
| 2089 | |
| 2090 | int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, |
| 2091 | int64_t ts, int64_t max_ts, int flags) |
| 2092 | { |
| 2093 | if (min_ts > ts || max_ts < ts) |
| 2094 | return -1; |
| 2095 | if (stream_index < -1 || stream_index >= (int)s->nb_streams) |
| 2096 | return AVERROR(EINVAL); |
| 2097 | |
| 2098 | if (s->seek2any>0) |
| 2099 | flags |= AVSEEK_FLAG_ANY; |
| 2100 | flags &= ~AVSEEK_FLAG_BACKWARD; |
| 2101 | |
| 2102 | if (s->iformat->read_seek2) { |
| 2103 | int ret; |
| 2104 | ff_read_frame_flush(s); |
| 2105 | |
| 2106 | if (stream_index == -1 && s->nb_streams == 1) { |
| 2107 | AVRational time_base = s->streams[0]->time_base; |
| 2108 | ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base); |
| 2109 | min_ts = av_rescale_rnd(min_ts, time_base.den, |
| 2110 | time_base.num * (int64_t)AV_TIME_BASE, |
| 2111 | AV_ROUND_UP | AV_ROUND_PASS_MINMAX); |
| 2112 | max_ts = av_rescale_rnd(max_ts, time_base.den, |
| 2113 | time_base.num * (int64_t)AV_TIME_BASE, |
| 2114 | AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX); |
| 2115 | } |
| 2116 | |
| 2117 | ret = s->iformat->read_seek2(s, stream_index, min_ts, |
| 2118 | ts, max_ts, flags); |
| 2119 | |
| 2120 | if (ret >= 0) |
| 2121 | ret = avformat_queue_attached_pictures(s); |
| 2122 | return ret; |
| 2123 | } |
| 2124 | |
| 2125 | if (s->iformat->read_timestamp) { |
| 2126 | // try to seek via read_timestamp() |
| 2127 | } |
| 2128 | |
| 2129 | // Fall back on old API if new is not implemented but old is. |
| 2130 | // Note the old API has somewhat different semantics. |
| 2131 | if (s->iformat->read_seek || 1) { |
| 2132 | int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0); |
| 2133 | int ret = av_seek_frame(s, stream_index, ts, flags | dir); |
| 2134 | if (ret<0 && ts != min_ts && max_ts != ts) { |
| 2135 | ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir); |
| 2136 | if (ret >= 0) |
| 2137 | ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD)); |
| 2138 | } |
| 2139 | return ret; |
| 2140 | } |
| 2141 | |
| 2142 | // try some generic seek like seek_frame_generic() but with new ts semantics |
| 2143 | return -1; //unreachable |
| 2144 | } |
| 2145 | |
| 2146 | /*******************************************************/ |
| 2147 | |
| 2148 | /** |
| 2149 | * Return TRUE if the stream has accurate duration in any stream. |
| 2150 | * |
| 2151 | * @return TRUE if the stream has accurate duration for at least one component. |
| 2152 | */ |
| 2153 | static int has_duration(AVFormatContext *ic) |
| 2154 | { |
| 2155 | int i; |
| 2156 | AVStream *st; |
| 2157 | |
| 2158 | for (i = 0; i < ic->nb_streams; i++) { |
| 2159 | st = ic->streams[i]; |
| 2160 | if (st->duration != AV_NOPTS_VALUE) |
| 2161 | return 1; |
| 2162 | } |
| 2163 | if (ic->duration != AV_NOPTS_VALUE) |
| 2164 | return 1; |
| 2165 | return 0; |
| 2166 | } |
| 2167 | |
| 2168 | /** |
| 2169 | * Estimate the stream timings from the one of each components. |
| 2170 | * |
| 2171 | * Also computes the global bitrate if possible. |
| 2172 | */ |
| 2173 | static void update_stream_timings(AVFormatContext *ic) |
| 2174 | { |
| 2175 | int64_t start_time, start_time1, start_time_text, end_time, end_time1; |
| 2176 | int64_t duration, duration1, filesize; |
| 2177 | int i; |
| 2178 | AVStream *st; |
| 2179 | AVProgram *p; |
| 2180 | |
| 2181 | start_time = INT64_MAX; |
| 2182 | start_time_text = INT64_MAX; |
| 2183 | end_time = INT64_MIN; |
| 2184 | duration = INT64_MIN; |
| 2185 | for (i = 0; i < ic->nb_streams; i++) { |
| 2186 | st = ic->streams[i]; |
| 2187 | if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) { |
| 2188 | start_time1 = av_rescale_q(st->start_time, st->time_base, |
| 2189 | AV_TIME_BASE_Q); |
| 2190 | if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) { |
| 2191 | if (start_time1 < start_time_text) |
| 2192 | start_time_text = start_time1; |
| 2193 | } else |
| 2194 | start_time = FFMIN(start_time, start_time1); |
| 2195 | end_time1 = AV_NOPTS_VALUE; |
| 2196 | if (st->duration != AV_NOPTS_VALUE) { |
| 2197 | end_time1 = start_time1 + |
| 2198 | av_rescale_q(st->duration, st->time_base, |
| 2199 | AV_TIME_BASE_Q); |
| 2200 | end_time = FFMAX(end_time, end_time1); |
| 2201 | } |
| 2202 | for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) { |
| 2203 | if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1) |
| 2204 | p->start_time = start_time1; |
| 2205 | if (p->end_time < end_time1) |
| 2206 | p->end_time = end_time1; |
| 2207 | } |
| 2208 | } |
| 2209 | if (st->duration != AV_NOPTS_VALUE) { |
| 2210 | duration1 = av_rescale_q(st->duration, st->time_base, |
| 2211 | AV_TIME_BASE_Q); |
| 2212 | duration = FFMAX(duration, duration1); |
| 2213 | } |
| 2214 | } |
| 2215 | if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE)) |
| 2216 | start_time = start_time_text; |
| 2217 | else if (start_time > start_time_text) |
| 2218 | av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE); |
| 2219 | |
| 2220 | if (start_time != INT64_MAX) { |
| 2221 | ic->start_time = start_time; |
| 2222 | if (end_time != INT64_MIN) { |
| 2223 | if (ic->nb_programs) { |
| 2224 | for (i = 0; i < ic->nb_programs; i++) { |
| 2225 | p = ic->programs[i]; |
| 2226 | if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time) |
| 2227 | duration = FFMAX(duration, p->end_time - p->start_time); |
| 2228 | } |
| 2229 | } else |
| 2230 | duration = FFMAX(duration, end_time - start_time); |
| 2231 | } |
| 2232 | } |
| 2233 | if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) { |
| 2234 | ic->duration = duration; |
| 2235 | } |
| 2236 | if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) { |
| 2237 | /* compute the bitrate */ |
| 2238 | double bitrate = (double) filesize * 8.0 * AV_TIME_BASE / |
| 2239 | (double) ic->duration; |
| 2240 | if (bitrate >= 0 && bitrate <= INT_MAX) |
| 2241 | ic->bit_rate = bitrate; |
| 2242 | } |
| 2243 | } |
| 2244 | |
| 2245 | static void fill_all_stream_timings(AVFormatContext *ic) |
| 2246 | { |
| 2247 | int i; |
| 2248 | AVStream *st; |
| 2249 | |
| 2250 | update_stream_timings(ic); |
| 2251 | for (i = 0; i < ic->nb_streams; i++) { |
| 2252 | st = ic->streams[i]; |
| 2253 | if (st->start_time == AV_NOPTS_VALUE) { |
| 2254 | if (ic->start_time != AV_NOPTS_VALUE) |
| 2255 | st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, |
| 2256 | st->time_base); |
| 2257 | if (ic->duration != AV_NOPTS_VALUE) |
| 2258 | st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, |
| 2259 | st->time_base); |
| 2260 | } |
| 2261 | } |
| 2262 | } |
| 2263 | |
| 2264 | static void estimate_timings_from_bit_rate(AVFormatContext *ic) |
| 2265 | { |
| 2266 | int64_t filesize, duration; |
| 2267 | int i, show_warning = 0; |
| 2268 | AVStream *st; |
| 2269 | |
| 2270 | /* if bit_rate is already set, we believe it */ |
| 2271 | if (ic->bit_rate <= 0) { |
| 2272 | int bit_rate = 0; |
| 2273 | for (i = 0; i < ic->nb_streams; i++) { |
| 2274 | st = ic->streams[i]; |
| 2275 | if (st->codec->bit_rate > 0) { |
| 2276 | if (INT_MAX - st->codec->bit_rate < bit_rate) { |
| 2277 | bit_rate = 0; |
| 2278 | break; |
| 2279 | } |
| 2280 | bit_rate += st->codec->bit_rate; |
| 2281 | } |
| 2282 | } |
| 2283 | ic->bit_rate = bit_rate; |
| 2284 | } |
| 2285 | |
| 2286 | /* if duration is already set, we believe it */ |
| 2287 | if (ic->duration == AV_NOPTS_VALUE && |
| 2288 | ic->bit_rate != 0) { |
| 2289 | filesize = ic->pb ? avio_size(ic->pb) : 0; |
| 2290 | if (filesize > ic->data_offset) { |
| 2291 | filesize -= ic->data_offset; |
| 2292 | for (i = 0; i < ic->nb_streams; i++) { |
| 2293 | st = ic->streams[i]; |
| 2294 | if ( st->time_base.num <= INT64_MAX / ic->bit_rate |
| 2295 | && st->duration == AV_NOPTS_VALUE) { |
| 2296 | duration = av_rescale(8 * filesize, st->time_base.den, |
| 2297 | ic->bit_rate * |
| 2298 | (int64_t) st->time_base.num); |
| 2299 | st->duration = duration; |
| 2300 | show_warning = 1; |
| 2301 | } |
| 2302 | } |
| 2303 | } |
| 2304 | } |
| 2305 | if (show_warning) |
| 2306 | av_log(ic, AV_LOG_WARNING, |
| 2307 | "Estimating duration from bitrate, this may be inaccurate\n"); |
| 2308 | } |
| 2309 | |
| 2310 | #define DURATION_MAX_READ_SIZE 250000LL |
| 2311 | #define DURATION_MAX_RETRY 4 |
| 2312 | |
| 2313 | /* only usable for MPEG-PS streams */ |
| 2314 | static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
| 2315 | { |
| 2316 | AVPacket pkt1, *pkt = &pkt1; |
| 2317 | AVStream *st; |
| 2318 | int num, den, read_size, i, ret; |
| 2319 | int found_duration = 0; |
| 2320 | int is_end; |
| 2321 | int64_t filesize, offset, duration; |
| 2322 | int retry = 0; |
| 2323 | |
| 2324 | /* flush packet queue */ |
| 2325 | flush_packet_queue(ic); |
| 2326 | |
| 2327 | for (i = 0; i < ic->nb_streams; i++) { |
| 2328 | st = ic->streams[i]; |
| 2329 | if (st->start_time == AV_NOPTS_VALUE && |
| 2330 | st->first_dts == AV_NOPTS_VALUE && |
| 2331 | st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) |
| 2332 | av_log(st->codec, AV_LOG_WARNING, |
| 2333 | "start time for stream %d is not set in estimate_timings_from_pts\n", i); |
| 2334 | |
| 2335 | if (st->parser) { |
| 2336 | av_parser_close(st->parser); |
| 2337 | st->parser = NULL; |
| 2338 | } |
| 2339 | } |
| 2340 | |
| 2341 | av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN); |
| 2342 | /* estimate the end time (duration) */ |
| 2343 | /* XXX: may need to support wrapping */ |
| 2344 | filesize = ic->pb ? avio_size(ic->pb) : 0; |
| 2345 | do { |
| 2346 | is_end = found_duration; |
| 2347 | offset = filesize - (DURATION_MAX_READ_SIZE << retry); |
| 2348 | if (offset < 0) |
| 2349 | offset = 0; |
| 2350 | |
| 2351 | avio_seek(ic->pb, offset, SEEK_SET); |
| 2352 | read_size = 0; |
| 2353 | for (;;) { |
| 2354 | if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0))) |
| 2355 | break; |
| 2356 | |
| 2357 | do { |
| 2358 | ret = ff_read_packet(ic, pkt); |
| 2359 | } while (ret == AVERROR(EAGAIN)); |
| 2360 | if (ret != 0) |
| 2361 | break; |
| 2362 | read_size += pkt->size; |
| 2363 | st = ic->streams[pkt->stream_index]; |
| 2364 | if (pkt->pts != AV_NOPTS_VALUE && |
| 2365 | (st->start_time != AV_NOPTS_VALUE || |
| 2366 | st->first_dts != AV_NOPTS_VALUE)) { |
| 2367 | if (pkt->duration == 0) { |
| 2368 | ff_compute_frame_duration(&num, &den, st, st->parser, pkt); |
| 2369 | if (den && num) { |
| 2370 | pkt->duration = av_rescale_rnd(1, |
| 2371 | num * (int64_t) st->time_base.den, |
| 2372 | den * (int64_t) st->time_base.num, |
| 2373 | AV_ROUND_DOWN); |
| 2374 | } |
| 2375 | } |
| 2376 | duration = pkt->pts + pkt->duration; |
| 2377 | found_duration = 1; |
| 2378 | if (st->start_time != AV_NOPTS_VALUE) |
| 2379 | duration -= st->start_time; |
| 2380 | else |
| 2381 | duration -= st->first_dts; |
| 2382 | if (duration > 0) { |
| 2383 | if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 || |
| 2384 | (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num)) |
| 2385 | st->duration = duration; |
| 2386 | st->info->last_duration = duration; |
| 2387 | } |
| 2388 | } |
| 2389 | av_free_packet(pkt); |
| 2390 | } |
| 2391 | |
| 2392 | /* check if all audio/video streams have valid duration */ |
| 2393 | if (!is_end) { |
| 2394 | is_end = 1; |
| 2395 | for (i = 0; i < ic->nb_streams; i++) { |
| 2396 | st = ic->streams[i]; |
| 2397 | switch (st->codec->codec_type) { |
| 2398 | case AVMEDIA_TYPE_VIDEO: |
| 2399 | case AVMEDIA_TYPE_AUDIO: |
| 2400 | if (st->duration == AV_NOPTS_VALUE) |
| 2401 | is_end = 0; |
| 2402 | } |
| 2403 | } |
| 2404 | } |
| 2405 | } while (!is_end && |
| 2406 | offset && |
| 2407 | ++retry <= DURATION_MAX_RETRY); |
| 2408 | |
| 2409 | av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN); |
| 2410 | |
| 2411 | /* warn about audio/video streams which duration could not be estimated */ |
| 2412 | for (i = 0; i < ic->nb_streams; i++) { |
| 2413 | st = ic->streams[i]; |
| 2414 | if (st->duration == AV_NOPTS_VALUE) { |
| 2415 | switch (st->codec->codec_type) { |
| 2416 | case AVMEDIA_TYPE_VIDEO: |
| 2417 | case AVMEDIA_TYPE_AUDIO: |
| 2418 | if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) { |
| 2419 | av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i); |
| 2420 | } else |
| 2421 | av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i); |
| 2422 | } |
| 2423 | } |
| 2424 | } |
| 2425 | fill_all_stream_timings(ic); |
| 2426 | |
| 2427 | avio_seek(ic->pb, old_offset, SEEK_SET); |
| 2428 | for (i = 0; i < ic->nb_streams; i++) { |
| 2429 | int j; |
| 2430 | |
| 2431 | st = ic->streams[i]; |
| 2432 | st->cur_dts = st->first_dts; |
| 2433 | st->last_IP_pts = AV_NOPTS_VALUE; |
| 2434 | st->last_dts_for_order_check = AV_NOPTS_VALUE; |
| 2435 | for (j = 0; j < MAX_REORDER_DELAY + 1; j++) |
| 2436 | st->pts_buffer[j] = AV_NOPTS_VALUE; |
| 2437 | } |
| 2438 | } |
| 2439 | |
| 2440 | static void estimate_timings(AVFormatContext *ic, int64_t old_offset) |
| 2441 | { |
| 2442 | int64_t file_size; |
| 2443 | |
| 2444 | /* get the file size, if possible */ |
| 2445 | if (ic->iformat->flags & AVFMT_NOFILE) { |
| 2446 | file_size = 0; |
| 2447 | } else { |
| 2448 | file_size = avio_size(ic->pb); |
| 2449 | file_size = FFMAX(0, file_size); |
| 2450 | } |
| 2451 | |
| 2452 | if ((!strcmp(ic->iformat->name, "mpeg") || |
| 2453 | !strcmp(ic->iformat->name, "mpegts")) && |
| 2454 | file_size && ic->pb->seekable) { |
| 2455 | /* get accurate estimate from the PTSes */ |
| 2456 | estimate_timings_from_pts(ic, old_offset); |
| 2457 | ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS; |
| 2458 | } else if (has_duration(ic)) { |
| 2459 | /* at least one component has timings - we use them for all |
| 2460 | * the components */ |
| 2461 | fill_all_stream_timings(ic); |
| 2462 | ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM; |
| 2463 | } else { |
| 2464 | /* less precise: use bitrate info */ |
| 2465 | estimate_timings_from_bit_rate(ic); |
| 2466 | ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE; |
| 2467 | } |
| 2468 | update_stream_timings(ic); |
| 2469 | |
| 2470 | { |
| 2471 | int i; |
| 2472 | AVStream av_unused *st; |
| 2473 | for (i = 0; i < ic->nb_streams; i++) { |
| 2474 | st = ic->streams[i]; |
| 2475 | av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i, |
| 2476 | (double) st->start_time / AV_TIME_BASE, |
| 2477 | (double) st->duration / AV_TIME_BASE); |
| 2478 | } |
| 2479 | av_dlog(ic, |
| 2480 | "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", |
| 2481 | (double) ic->start_time / AV_TIME_BASE, |
| 2482 | (double) ic->duration / AV_TIME_BASE, |
| 2483 | ic->bit_rate / 1000); |
| 2484 | } |
| 2485 | } |
| 2486 | |
| 2487 | static int has_codec_parameters(AVStream *st, const char **errmsg_ptr) |
| 2488 | { |
| 2489 | AVCodecContext *avctx = st->codec; |
| 2490 | |
| 2491 | #define FAIL(errmsg) do { \ |
| 2492 | if (errmsg_ptr) \ |
| 2493 | *errmsg_ptr = errmsg; \ |
| 2494 | return 0; \ |
| 2495 | } while (0) |
| 2496 | |
| 2497 | if ( avctx->codec_id == AV_CODEC_ID_NONE |
| 2498 | && avctx->codec_type != AVMEDIA_TYPE_DATA) |
| 2499 | FAIL("unknown codec"); |
| 2500 | switch (avctx->codec_type) { |
| 2501 | case AVMEDIA_TYPE_AUDIO: |
| 2502 | if (!avctx->frame_size && determinable_frame_size(avctx)) |
| 2503 | FAIL("unspecified frame size"); |
| 2504 | if (st->info->found_decoder >= 0 && |
| 2505 | avctx->sample_fmt == AV_SAMPLE_FMT_NONE) |
| 2506 | FAIL("unspecified sample format"); |
| 2507 | if (!avctx->sample_rate) |
| 2508 | FAIL("unspecified sample rate"); |
| 2509 | if (!avctx->channels) |
| 2510 | FAIL("unspecified number of channels"); |
| 2511 | if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS) |
| 2512 | FAIL("no decodable DTS frames"); |
| 2513 | break; |
| 2514 | case AVMEDIA_TYPE_VIDEO: |
| 2515 | if (!avctx->width) |
| 2516 | FAIL("unspecified size"); |
| 2517 | if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE) |
| 2518 | FAIL("unspecified pixel format"); |
| 2519 | if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40) |
| 2520 | if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames) |
| 2521 | FAIL("no frame in rv30/40 and no sar"); |
| 2522 | break; |
| 2523 | case AVMEDIA_TYPE_SUBTITLE: |
| 2524 | if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width) |
| 2525 | FAIL("unspecified size"); |
| 2526 | break; |
| 2527 | case AVMEDIA_TYPE_DATA: |
| 2528 | if (avctx->codec_id == AV_CODEC_ID_NONE) return 1; |
| 2529 | } |
| 2530 | |
| 2531 | return 1; |
| 2532 | } |
| 2533 | |
| 2534 | /* returns 1 or 0 if or if not decoded data was returned, or a negative error */ |
| 2535 | static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt, |
| 2536 | AVDictionary **options) |
| 2537 | { |
| 2538 | const AVCodec *codec; |
| 2539 | int got_picture = 1, ret = 0; |
| 2540 | AVFrame *frame = av_frame_alloc(); |
| 2541 | AVSubtitle subtitle; |
| 2542 | AVPacket pkt = *avpkt; |
| 2543 | |
| 2544 | if (!frame) |
| 2545 | return AVERROR(ENOMEM); |
| 2546 | |
| 2547 | if (!avcodec_is_open(st->codec) && |
| 2548 | st->info->found_decoder <= 0 && |
| 2549 | (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) { |
| 2550 | AVDictionary *thread_opt = NULL; |
| 2551 | |
| 2552 | codec = find_decoder(s, st, st->codec->codec_id); |
| 2553 | |
| 2554 | if (!codec) { |
| 2555 | st->info->found_decoder = -st->codec->codec_id; |
| 2556 | ret = -1; |
| 2557 | goto fail; |
| 2558 | } |
| 2559 | |
| 2560 | /* Force thread count to 1 since the H.264 decoder will not extract |
| 2561 | * SPS and PPS to extradata during multi-threaded decoding. */ |
| 2562 | av_dict_set(options ? options : &thread_opt, "threads", "1", 0); |
| 2563 | ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt); |
| 2564 | if (!options) |
| 2565 | av_dict_free(&thread_opt); |
| 2566 | if (ret < 0) { |
| 2567 | st->info->found_decoder = -st->codec->codec_id; |
| 2568 | goto fail; |
| 2569 | } |
| 2570 | st->info->found_decoder = 1; |
| 2571 | } else if (!st->info->found_decoder) |
| 2572 | st->info->found_decoder = 1; |
| 2573 | |
| 2574 | if (st->info->found_decoder < 0) { |
| 2575 | ret = -1; |
| 2576 | goto fail; |
| 2577 | } |
| 2578 | |
| 2579 | while ((pkt.size > 0 || (!pkt.data && got_picture)) && |
| 2580 | ret >= 0 && |
| 2581 | (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) || |
| 2582 | (!st->codec_info_nb_frames && |
| 2583 | st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) { |
| 2584 | got_picture = 0; |
| 2585 | switch (st->codec->codec_type) { |
| 2586 | case AVMEDIA_TYPE_VIDEO: |
| 2587 | ret = avcodec_decode_video2(st->codec, frame, |
| 2588 | &got_picture, &pkt); |
| 2589 | break; |
| 2590 | case AVMEDIA_TYPE_AUDIO: |
| 2591 | ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt); |
| 2592 | break; |
| 2593 | case AVMEDIA_TYPE_SUBTITLE: |
| 2594 | ret = avcodec_decode_subtitle2(st->codec, &subtitle, |
| 2595 | &got_picture, &pkt); |
| 2596 | ret = pkt.size; |
| 2597 | break; |
| 2598 | default: |
| 2599 | break; |
| 2600 | } |
| 2601 | if (ret >= 0) { |
| 2602 | if (got_picture) |
| 2603 | st->nb_decoded_frames++; |
| 2604 | pkt.data += ret; |
| 2605 | pkt.size -= ret; |
| 2606 | ret = got_picture; |
| 2607 | } |
| 2608 | } |
| 2609 | |
| 2610 | if (!pkt.data && !got_picture) |
| 2611 | ret = -1; |
| 2612 | |
| 2613 | fail: |
| 2614 | av_frame_free(&frame); |
| 2615 | return ret; |
| 2616 | } |
| 2617 | |
| 2618 | unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id) |
| 2619 | { |
| 2620 | while (tags->id != AV_CODEC_ID_NONE) { |
| 2621 | if (tags->id == id) |
| 2622 | return tags->tag; |
| 2623 | tags++; |
| 2624 | } |
| 2625 | return 0; |
| 2626 | } |
| 2627 | |
| 2628 | enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag) |
| 2629 | { |
| 2630 | int i; |
| 2631 | for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++) |
| 2632 | if (tag == tags[i].tag) |
| 2633 | return tags[i].id; |
| 2634 | for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++) |
| 2635 | if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag)) |
| 2636 | return tags[i].id; |
| 2637 | return AV_CODEC_ID_NONE; |
| 2638 | } |
| 2639 | |
| 2640 | enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags) |
| 2641 | { |
| 2642 | if (flt) { |
| 2643 | switch (bps) { |
| 2644 | case 32: |
| 2645 | return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE; |
| 2646 | case 64: |
| 2647 | return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE; |
| 2648 | default: |
| 2649 | return AV_CODEC_ID_NONE; |
| 2650 | } |
| 2651 | } else { |
| 2652 | bps += 7; |
| 2653 | bps >>= 3; |
| 2654 | if (sflags & (1 << (bps - 1))) { |
| 2655 | switch (bps) { |
| 2656 | case 1: |
| 2657 | return AV_CODEC_ID_PCM_S8; |
| 2658 | case 2: |
| 2659 | return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE; |
| 2660 | case 3: |
| 2661 | return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE; |
| 2662 | case 4: |
| 2663 | return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE; |
| 2664 | default: |
| 2665 | return AV_CODEC_ID_NONE; |
| 2666 | } |
| 2667 | } else { |
| 2668 | switch (bps) { |
| 2669 | case 1: |
| 2670 | return AV_CODEC_ID_PCM_U8; |
| 2671 | case 2: |
| 2672 | return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE; |
| 2673 | case 3: |
| 2674 | return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE; |
| 2675 | case 4: |
| 2676 | return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE; |
| 2677 | default: |
| 2678 | return AV_CODEC_ID_NONE; |
| 2679 | } |
| 2680 | } |
| 2681 | } |
| 2682 | } |
| 2683 | |
| 2684 | unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id) |
| 2685 | { |
| 2686 | unsigned int tag; |
| 2687 | if (!av_codec_get_tag2(tags, id, &tag)) |
| 2688 | return 0; |
| 2689 | return tag; |
| 2690 | } |
| 2691 | |
| 2692 | int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id, |
| 2693 | unsigned int *tag) |
| 2694 | { |
| 2695 | int i; |
| 2696 | for (i = 0; tags && tags[i]; i++) { |
| 2697 | const AVCodecTag *codec_tags = tags[i]; |
| 2698 | while (codec_tags->id != AV_CODEC_ID_NONE) { |
| 2699 | if (codec_tags->id == id) { |
| 2700 | *tag = codec_tags->tag; |
| 2701 | return 1; |
| 2702 | } |
| 2703 | codec_tags++; |
| 2704 | } |
| 2705 | } |
| 2706 | return 0; |
| 2707 | } |
| 2708 | |
| 2709 | enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag) |
| 2710 | { |
| 2711 | int i; |
| 2712 | for (i = 0; tags && tags[i]; i++) { |
| 2713 | enum AVCodecID id = ff_codec_get_id(tags[i], tag); |
| 2714 | if (id != AV_CODEC_ID_NONE) |
| 2715 | return id; |
| 2716 | } |
| 2717 | return AV_CODEC_ID_NONE; |
| 2718 | } |
| 2719 | |
| 2720 | static void compute_chapters_end(AVFormatContext *s) |
| 2721 | { |
| 2722 | unsigned int i, j; |
| 2723 | int64_t max_time = s->duration + |
| 2724 | ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time); |
| 2725 | |
| 2726 | for (i = 0; i < s->nb_chapters; i++) |
| 2727 | if (s->chapters[i]->end == AV_NOPTS_VALUE) { |
| 2728 | AVChapter *ch = s->chapters[i]; |
| 2729 | int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, |
| 2730 | ch->time_base) |
| 2731 | : INT64_MAX; |
| 2732 | |
| 2733 | for (j = 0; j < s->nb_chapters; j++) { |
| 2734 | AVChapter *ch1 = s->chapters[j]; |
| 2735 | int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, |
| 2736 | ch->time_base); |
| 2737 | if (j != i && next_start > ch->start && next_start < end) |
| 2738 | end = next_start; |
| 2739 | } |
| 2740 | ch->end = (end == INT64_MAX) ? ch->start : end; |
| 2741 | } |
| 2742 | } |
| 2743 | |
| 2744 | static int get_std_framerate(int i) |
| 2745 | { |
| 2746 | if (i < 60 * 12) |
| 2747 | return (i + 1) * 1001; |
| 2748 | else |
| 2749 | return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12; |
| 2750 | } |
| 2751 | |
| 2752 | /* Is the time base unreliable? |
| 2753 | * This is a heuristic to balance between quick acceptance of the values in |
| 2754 | * the headers vs. some extra checks. |
| 2755 | * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. |
| 2756 | * MPEG-2 commonly misuses field repeat flags to store different framerates. |
| 2757 | * And there are "variable" fps files this needs to detect as well. */ |
| 2758 | static int tb_unreliable(AVCodecContext *c) |
| 2759 | { |
| 2760 | if (c->time_base.den >= 101L * c->time_base.num || |
| 2761 | c->time_base.den < 5L * c->time_base.num || |
| 2762 | // c->codec_tag == AV_RL32("DIVX") || |
| 2763 | // c->codec_tag == AV_RL32("XVID") || |
| 2764 | c->codec_tag == AV_RL32("mp4v") || |
| 2765 | c->codec_id == AV_CODEC_ID_MPEG2VIDEO || |
| 2766 | c->codec_id == AV_CODEC_ID_GIF || |
| 2767 | c->codec_id == AV_CODEC_ID_H264) |
| 2768 | return 1; |
| 2769 | return 0; |
| 2770 | } |
| 2771 | |
| 2772 | #if FF_API_FORMAT_PARAMETERS |
| 2773 | int av_find_stream_info(AVFormatContext *ic) |
| 2774 | { |
| 2775 | return avformat_find_stream_info(ic, NULL); |
| 2776 | } |
| 2777 | #endif |
| 2778 | |
| 2779 | int ff_alloc_extradata(AVCodecContext *avctx, int size) |
| 2780 | { |
| 2781 | int ret; |
| 2782 | |
| 2783 | if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) { |
| 2784 | avctx->extradata_size = 0; |
| 2785 | return AVERROR(EINVAL); |
| 2786 | } |
| 2787 | avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 2788 | if (avctx->extradata) { |
| 2789 | memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| 2790 | avctx->extradata_size = size; |
| 2791 | ret = 0; |
| 2792 | } else { |
| 2793 | avctx->extradata_size = 0; |
| 2794 | ret = AVERROR(ENOMEM); |
| 2795 | } |
| 2796 | return ret; |
| 2797 | } |
| 2798 | |
| 2799 | int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size) |
| 2800 | { |
| 2801 | int ret = ff_alloc_extradata(avctx, size); |
| 2802 | if (ret < 0) |
| 2803 | return ret; |
| 2804 | ret = avio_read(pb, avctx->extradata, size); |
| 2805 | if (ret != size) { |
| 2806 | av_freep(&avctx->extradata); |
| 2807 | avctx->extradata_size = 0; |
| 2808 | av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size); |
| 2809 | return ret < 0 ? ret : AVERROR_INVALIDDATA; |
| 2810 | } |
| 2811 | |
| 2812 | return ret; |
| 2813 | } |
| 2814 | |
| 2815 | int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts) |
| 2816 | { |
| 2817 | int i, j; |
| 2818 | int64_t last = st->info->last_dts; |
| 2819 | |
| 2820 | if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last |
| 2821 | && ts - (uint64_t)last < INT64_MAX) { |
| 2822 | double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base); |
| 2823 | int64_t duration = ts - last; |
| 2824 | |
| 2825 | if (!st->info->duration_error) |
| 2826 | st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2); |
| 2827 | if (!st->info->duration_error) |
| 2828 | return AVERROR(ENOMEM); |
| 2829 | |
| 2830 | // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 2831 | // av_log(NULL, AV_LOG_ERROR, "%f\n", dts); |
| 2832 | for (i = 0; i<MAX_STD_TIMEBASES; i++) { |
| 2833 | if (st->info->duration_error[0][1][i] < 1e10) { |
| 2834 | int framerate = get_std_framerate(i); |
| 2835 | double sdts = dts*framerate/(1001*12); |
| 2836 | for (j= 0; j<2; j++) { |
| 2837 | int64_t ticks = llrint(sdts+j*0.5); |
| 2838 | double error= sdts - ticks + j*0.5; |
| 2839 | st->info->duration_error[j][0][i] += error; |
| 2840 | st->info->duration_error[j][1][i] += error*error; |
| 2841 | } |
| 2842 | } |
| 2843 | } |
| 2844 | st->info->duration_count++; |
| 2845 | st->info->rfps_duration_sum += duration; |
| 2846 | |
| 2847 | if (st->info->duration_count % 10 == 0) { |
| 2848 | int n = st->info->duration_count; |
| 2849 | for (i = 0; i<MAX_STD_TIMEBASES; i++) { |
| 2850 | if (st->info->duration_error[0][1][i] < 1e10) { |
| 2851 | double a0 = st->info->duration_error[0][0][i] / n; |
| 2852 | double error0 = st->info->duration_error[0][1][i] / n - a0*a0; |
| 2853 | double a1 = st->info->duration_error[1][0][i] / n; |
| 2854 | double error1 = st->info->duration_error[1][1][i] / n - a1*a1; |
| 2855 | if (error0 > 0.04 && error1 > 0.04) { |
| 2856 | st->info->duration_error[0][1][i] = 2e10; |
| 2857 | st->info->duration_error[1][1][i] = 2e10; |
| 2858 | } |
| 2859 | } |
| 2860 | } |
| 2861 | } |
| 2862 | |
| 2863 | // ignore the first 4 values, they might have some random jitter |
| 2864 | if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last)) |
| 2865 | st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); |
| 2866 | } |
| 2867 | if (ts != AV_NOPTS_VALUE) |
| 2868 | st->info->last_dts = ts; |
| 2869 | |
| 2870 | return 0; |
| 2871 | } |
| 2872 | |
| 2873 | void ff_rfps_calculate(AVFormatContext *ic) |
| 2874 | { |
| 2875 | int i, j; |
| 2876 | |
| 2877 | for (i = 0; i < ic->nb_streams; i++) { |
| 2878 | AVStream *st = ic->streams[i]; |
| 2879 | |
| 2880 | if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) |
| 2881 | continue; |
| 2882 | // the check for tb_unreliable() is not completely correct, since this is not about handling |
| 2883 | // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g. |
| 2884 | // ipmovie.c produces. |
| 2885 | if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num) |
| 2886 | av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX); |
| 2887 | if (st->info->duration_count>1 && !st->r_frame_rate.num |
| 2888 | && tb_unreliable(st->codec)) { |
| 2889 | int num = 0; |
| 2890 | double best_error= 0.01; |
| 2891 | AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base); |
| 2892 | |
| 2893 | for (j= 0; j<MAX_STD_TIMEBASES; j++) { |
| 2894 | int k; |
| 2895 | |
| 2896 | if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j)) |
| 2897 | continue; |
| 2898 | if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j)) |
| 2899 | continue; |
| 2900 | |
| 2901 | if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j)) |
| 2902 | continue; |
| 2903 | |
| 2904 | for (k= 0; k<2; k++) { |
| 2905 | int n = st->info->duration_count; |
| 2906 | double a= st->info->duration_error[k][0][j] / n; |
| 2907 | double error= st->info->duration_error[k][1][j]/n - a*a; |
| 2908 | |
| 2909 | if (error < best_error && best_error> 0.000000001) { |
| 2910 | best_error= error; |
| 2911 | num = get_std_framerate(j); |
| 2912 | } |
| 2913 | if (error < 0.02) |
| 2914 | av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error); |
| 2915 | } |
| 2916 | } |
| 2917 | // do not increase frame rate by more than 1 % in order to match a standard rate. |
| 2918 | if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate))) |
| 2919 | av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
| 2920 | } |
| 2921 | if ( !st->avg_frame_rate.num |
| 2922 | && st->r_frame_rate.num && st->info->rfps_duration_sum |
| 2923 | && st->info->codec_info_duration <= 0 |
| 2924 | && st->info->duration_count > 2 |
| 2925 | && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0 |
| 2926 | ) { |
| 2927 | av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n"); |
| 2928 | st->avg_frame_rate = st->r_frame_rate; |
| 2929 | } |
| 2930 | |
| 2931 | av_freep(&st->info->duration_error); |
| 2932 | st->info->last_dts = AV_NOPTS_VALUE; |
| 2933 | st->info->duration_count = 0; |
| 2934 | st->info->rfps_duration_sum = 0; |
| 2935 | } |
| 2936 | } |
| 2937 | |
| 2938 | int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
| 2939 | { |
| 2940 | int i, count, ret = 0, j; |
| 2941 | int64_t read_size; |
| 2942 | AVStream *st; |
| 2943 | AVPacket pkt1, *pkt; |
| 2944 | int64_t old_offset = avio_tell(ic->pb); |
| 2945 | // new streams might appear, no options for those |
| 2946 | int orig_nb_streams = ic->nb_streams; |
| 2947 | int flush_codecs; |
| 2948 | int64_t max_analyze_duration = ic->max_analyze_duration2; |
| 2949 | int64_t probesize = ic->probesize2; |
| 2950 | |
| 2951 | if (!max_analyze_duration) |
| 2952 | max_analyze_duration = ic->max_analyze_duration; |
| 2953 | if (ic->probesize) |
| 2954 | probesize = ic->probesize; |
| 2955 | flush_codecs = probesize > 0; |
| 2956 | |
| 2957 | av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN); |
| 2958 | |
| 2959 | if (!max_analyze_duration) { |
| 2960 | if (!strcmp(ic->iformat->name, "flv") && !(ic->ctx_flags & AVFMTCTX_NOHEADER)) { |
| 2961 | max_analyze_duration = 10*AV_TIME_BASE; |
| 2962 | } else |
| 2963 | max_analyze_duration = 5*AV_TIME_BASE; |
| 2964 | } |
| 2965 | |
| 2966 | if (ic->pb) |
| 2967 | av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n", |
| 2968 | avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count); |
| 2969 | |
| 2970 | for (i = 0; i < ic->nb_streams; i++) { |
| 2971 | const AVCodec *codec; |
| 2972 | AVDictionary *thread_opt = NULL; |
| 2973 | st = ic->streams[i]; |
| 2974 | |
| 2975 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
| 2976 | st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
| 2977 | /* if (!st->time_base.num) |
| 2978 | st->time_base = */ |
| 2979 | if (!st->codec->time_base.num) |
| 2980 | st->codec->time_base = st->time_base; |
| 2981 | } |
| 2982 | // only for the split stuff |
| 2983 | if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) { |
| 2984 | st->parser = av_parser_init(st->codec->codec_id); |
| 2985 | if (st->parser) { |
| 2986 | if (st->need_parsing == AVSTREAM_PARSE_HEADERS) { |
| 2987 | st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| 2988 | } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) { |
| 2989 | st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; |
| 2990 | } |
| 2991 | } else if (st->need_parsing) { |
| 2992 | av_log(ic, AV_LOG_VERBOSE, "parser not found for codec " |
| 2993 | "%s, packets or times may be invalid.\n", |
| 2994 | avcodec_get_name(st->codec->codec_id)); |
| 2995 | } |
| 2996 | } |
| 2997 | codec = find_decoder(ic, st, st->codec->codec_id); |
| 2998 | |
| 2999 | /* Force thread count to 1 since the H.264 decoder will not extract |
| 3000 | * SPS and PPS to extradata during multi-threaded decoding. */ |
| 3001 | av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0); |
| 3002 | |
| 3003 | /* Ensure that subtitle_header is properly set. */ |
| 3004 | if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE |
| 3005 | && codec && !st->codec->codec) { |
| 3006 | if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) |
| 3007 | av_log(ic, AV_LOG_WARNING, |
| 3008 | "Failed to open codec in av_find_stream_info\n"); |
| 3009 | } |
| 3010 | |
| 3011 | // Try to just open decoders, in case this is enough to get parameters. |
| 3012 | if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) { |
| 3013 | if (codec && !st->codec->codec) |
| 3014 | if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) |
| 3015 | av_log(ic, AV_LOG_WARNING, |
| 3016 | "Failed to open codec in av_find_stream_info\n"); |
| 3017 | } |
| 3018 | if (!options) |
| 3019 | av_dict_free(&thread_opt); |
| 3020 | } |
| 3021 | |
| 3022 | for (i = 0; i < ic->nb_streams; i++) { |
| 3023 | #if FF_API_R_FRAME_RATE |
| 3024 | ic->streams[i]->info->last_dts = AV_NOPTS_VALUE; |
| 3025 | #endif |
| 3026 | ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE; |
| 3027 | ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE; |
| 3028 | } |
| 3029 | |
| 3030 | count = 0; |
| 3031 | read_size = 0; |
| 3032 | for (;;) { |
| 3033 | if (ff_check_interrupt(&ic->interrupt_callback)) { |
| 3034 | ret = AVERROR_EXIT; |
| 3035 | av_log(ic, AV_LOG_DEBUG, "interrupted\n"); |
| 3036 | break; |
| 3037 | } |
| 3038 | |
| 3039 | /* check if one codec still needs to be handled */ |
| 3040 | for (i = 0; i < ic->nb_streams; i++) { |
| 3041 | int fps_analyze_framecount = 20; |
| 3042 | |
| 3043 | st = ic->streams[i]; |
| 3044 | if (!has_codec_parameters(st, NULL)) |
| 3045 | break; |
| 3046 | /* If the timebase is coarse (like the usual millisecond precision |
| 3047 | * of mkv), we need to analyze more frames to reliably arrive at |
| 3048 | * the correct fps. */ |
| 3049 | if (av_q2d(st->time_base) > 0.0005) |
| 3050 | fps_analyze_framecount *= 2; |
| 3051 | if (!tb_unreliable(st->codec)) |
| 3052 | fps_analyze_framecount = 0; |
| 3053 | if (ic->fps_probe_size >= 0) |
| 3054 | fps_analyze_framecount = ic->fps_probe_size; |
| 3055 | if (st->disposition & AV_DISPOSITION_ATTACHED_PIC) |
| 3056 | fps_analyze_framecount = 0; |
| 3057 | /* variable fps and no guess at the real fps */ |
| 3058 | if (!(st->r_frame_rate.num && st->avg_frame_rate.num) && |
| 3059 | st->info->duration_count < fps_analyze_framecount && |
| 3060 | st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 3061 | break; |
| 3062 | if (st->parser && st->parser->parser->split && |
| 3063 | !st->codec->extradata) |
| 3064 | break; |
| 3065 | if (st->first_dts == AV_NOPTS_VALUE && |
| 3066 | !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) && |
| 3067 | st->codec_info_nb_frames < ic->max_ts_probe && |
| 3068 | (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
| 3069 | st->codec->codec_type == AVMEDIA_TYPE_AUDIO)) |
| 3070 | break; |
| 3071 | } |
| 3072 | if (i == ic->nb_streams) { |
| 3073 | /* NOTE: If the format has no header, then we need to read some |
| 3074 | * packets to get most of the streams, so we cannot stop here. */ |
| 3075 | if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { |
| 3076 | /* If we found the info for all the codecs, we can stop. */ |
| 3077 | ret = count; |
| 3078 | av_log(ic, AV_LOG_DEBUG, "All info found\n"); |
| 3079 | flush_codecs = 0; |
| 3080 | break; |
| 3081 | } |
| 3082 | } |
| 3083 | /* We did not get all the codec info, but we read too much data. */ |
| 3084 | if (read_size >= probesize) { |
| 3085 | ret = count; |
| 3086 | av_log(ic, AV_LOG_DEBUG, |
| 3087 | "Probe buffer size limit of %"PRId64" bytes reached\n", probesize); |
| 3088 | for (i = 0; i < ic->nb_streams; i++) |
| 3089 | if (!ic->streams[i]->r_frame_rate.num && |
| 3090 | ic->streams[i]->info->duration_count <= 1 && |
| 3091 | ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
| 3092 | strcmp(ic->iformat->name, "image2")) |
| 3093 | av_log(ic, AV_LOG_WARNING, |
| 3094 | "Stream #%d: not enough frames to estimate rate; " |
| 3095 | "consider increasing probesize\n", i); |
| 3096 | break; |
| 3097 | } |
| 3098 | |
| 3099 | /* NOTE: A new stream can be added there if no header in file |
| 3100 | * (AVFMTCTX_NOHEADER). */ |
| 3101 | ret = read_frame_internal(ic, &pkt1); |
| 3102 | if (ret == AVERROR(EAGAIN)) |
| 3103 | continue; |
| 3104 | |
| 3105 | if (ret < 0) { |
| 3106 | /* EOF or error*/ |
| 3107 | break; |
| 3108 | } |
| 3109 | |
| 3110 | if (ic->flags & AVFMT_FLAG_NOBUFFER) |
| 3111 | free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end); |
| 3112 | { |
| 3113 | pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1, |
| 3114 | &ic->packet_buffer_end); |
| 3115 | if (!pkt) { |
| 3116 | ret = AVERROR(ENOMEM); |
| 3117 | goto find_stream_info_err; |
| 3118 | } |
| 3119 | if ((ret = av_dup_packet(pkt)) < 0) |
| 3120 | goto find_stream_info_err; |
| 3121 | } |
| 3122 | |
| 3123 | st = ic->streams[pkt->stream_index]; |
| 3124 | if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) |
| 3125 | read_size += pkt->size; |
| 3126 | |
| 3127 | if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) { |
| 3128 | /* check for non-increasing dts */ |
| 3129 | if (st->info->fps_last_dts != AV_NOPTS_VALUE && |
| 3130 | st->info->fps_last_dts >= pkt->dts) { |
| 3131 | av_log(ic, AV_LOG_DEBUG, |
| 3132 | "Non-increasing DTS in stream %d: packet %d with DTS " |
| 3133 | "%"PRId64", packet %d with DTS %"PRId64"\n", |
| 3134 | st->index, st->info->fps_last_dts_idx, |
| 3135 | st->info->fps_last_dts, st->codec_info_nb_frames, |
| 3136 | pkt->dts); |
| 3137 | st->info->fps_first_dts = |
| 3138 | st->info->fps_last_dts = AV_NOPTS_VALUE; |
| 3139 | } |
| 3140 | /* Check for a discontinuity in dts. If the difference in dts |
| 3141 | * is more than 1000 times the average packet duration in the |
| 3142 | * sequence, we treat it as a discontinuity. */ |
| 3143 | if (st->info->fps_last_dts != AV_NOPTS_VALUE && |
| 3144 | st->info->fps_last_dts_idx > st->info->fps_first_dts_idx && |
| 3145 | (pkt->dts - st->info->fps_last_dts) / 1000 > |
| 3146 | (st->info->fps_last_dts - st->info->fps_first_dts) / |
| 3147 | (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) { |
| 3148 | av_log(ic, AV_LOG_WARNING, |
| 3149 | "DTS discontinuity in stream %d: packet %d with DTS " |
| 3150 | "%"PRId64", packet %d with DTS %"PRId64"\n", |
| 3151 | st->index, st->info->fps_last_dts_idx, |
| 3152 | st->info->fps_last_dts, st->codec_info_nb_frames, |
| 3153 | pkt->dts); |
| 3154 | st->info->fps_first_dts = |
| 3155 | st->info->fps_last_dts = AV_NOPTS_VALUE; |
| 3156 | } |
| 3157 | |
| 3158 | /* update stored dts values */ |
| 3159 | if (st->info->fps_first_dts == AV_NOPTS_VALUE) { |
| 3160 | st->info->fps_first_dts = pkt->dts; |
| 3161 | st->info->fps_first_dts_idx = st->codec_info_nb_frames; |
| 3162 | } |
| 3163 | st->info->fps_last_dts = pkt->dts; |
| 3164 | st->info->fps_last_dts_idx = st->codec_info_nb_frames; |
| 3165 | } |
| 3166 | if (st->codec_info_nb_frames>1) { |
| 3167 | int64_t t = 0; |
| 3168 | |
| 3169 | if (st->time_base.den > 0) |
| 3170 | t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q); |
| 3171 | if (st->avg_frame_rate.num > 0) |
| 3172 | t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q)); |
| 3173 | |
| 3174 | if ( t == 0 |
| 3175 | && st->codec_info_nb_frames>30 |
| 3176 | && st->info->fps_first_dts != AV_NOPTS_VALUE |
| 3177 | && st->info->fps_last_dts != AV_NOPTS_VALUE) |
| 3178 | t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q)); |
| 3179 | |
| 3180 | if (t >= max_analyze_duration) { |
| 3181 | av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n", |
| 3182 | max_analyze_duration, |
| 3183 | t); |
| 3184 | break; |
| 3185 | } |
| 3186 | if (pkt->duration) { |
| 3187 | st->info->codec_info_duration += pkt->duration; |
| 3188 | st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2; |
| 3189 | } |
| 3190 | } |
| 3191 | #if FF_API_R_FRAME_RATE |
| 3192 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| 3193 | ff_rfps_add_frame(ic, st, pkt->dts); |
| 3194 | #endif |
| 3195 | if (st->parser && st->parser->parser->split && !st->codec->extradata) { |
| 3196 | int i = st->parser->parser->split(st->codec, pkt->data, pkt->size); |
| 3197 | if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) { |
| 3198 | if (ff_alloc_extradata(st->codec, i)) |
| 3199 | return AVERROR(ENOMEM); |
| 3200 | memcpy(st->codec->extradata, pkt->data, |
| 3201 | st->codec->extradata_size); |
| 3202 | } |
| 3203 | } |
| 3204 | |
| 3205 | /* If still no information, we try to open the codec and to |
| 3206 | * decompress the frame. We try to avoid that in most cases as |
| 3207 | * it takes longer and uses more memory. For MPEG-4, we need to |
| 3208 | * decompress for QuickTime. |
| 3209 | * |
| 3210 | * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at |
| 3211 | * least one frame of codec data, this makes sure the codec initializes |
| 3212 | * the channel configuration and does not only trust the values from |
| 3213 | * the container. */ |
| 3214 | try_decode_frame(ic, st, pkt, |
| 3215 | (options && i < orig_nb_streams) ? &options[i] : NULL); |
| 3216 | |
| 3217 | st->codec_info_nb_frames++; |
| 3218 | count++; |
| 3219 | } |
| 3220 | |
| 3221 | if (flush_codecs) { |
| 3222 | AVPacket empty_pkt = { 0 }; |
| 3223 | int err = 0; |
| 3224 | av_init_packet(&empty_pkt); |
| 3225 | |
| 3226 | for (i = 0; i < ic->nb_streams; i++) { |
| 3227 | |
| 3228 | st = ic->streams[i]; |
| 3229 | |
| 3230 | /* flush the decoders */ |
| 3231 | if (st->info->found_decoder == 1) { |
| 3232 | do { |
| 3233 | err = try_decode_frame(ic, st, &empty_pkt, |
| 3234 | (options && i < orig_nb_streams) |
| 3235 | ? &options[i] : NULL); |
| 3236 | } while (err > 0 && !has_codec_parameters(st, NULL)); |
| 3237 | |
| 3238 | if (err < 0) { |
| 3239 | av_log(ic, AV_LOG_INFO, |
| 3240 | "decoding for stream %d failed\n", st->index); |
| 3241 | } |
| 3242 | } |
| 3243 | } |
| 3244 | } |
| 3245 | av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN); |
| 3246 | |
| 3247 | // close codecs which were opened in try_decode_frame() |
| 3248 | for (i = 0; i < ic->nb_streams; i++) { |
| 3249 | st = ic->streams[i]; |
| 3250 | avcodec_close(st->codec); |
| 3251 | } |
| 3252 | |
| 3253 | ff_rfps_calculate(ic); |
| 3254 | |
| 3255 | for (i = 0; i < ic->nb_streams; i++) { |
| 3256 | st = ic->streams[i]; |
| 3257 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| 3258 | if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) { |
| 3259 | uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
| 3260 | if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt) |
| 3261 | st->codec->codec_tag= tag; |
| 3262 | } |
| 3263 | |
| 3264 | /* estimate average framerate if not set by demuxer */ |
| 3265 | if (st->info->codec_info_duration_fields && |
| 3266 | !st->avg_frame_rate.num && |
| 3267 | st->info->codec_info_duration) { |
| 3268 | int best_fps = 0; |
| 3269 | double best_error = 0.01; |
| 3270 | |
| 3271 | if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2|| |
| 3272 | st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den || |
| 3273 | st->info->codec_info_duration < 0) |
| 3274 | continue; |
| 3275 | av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
| 3276 | st->info->codec_info_duration_fields * (int64_t) st->time_base.den, |
| 3277 | st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000); |
| 3278 | |
| 3279 | /* Round guessed framerate to a "standard" framerate if it's |
| 3280 | * within 1% of the original estimate. */ |
| 3281 | for (j = 0; j < MAX_STD_TIMEBASES; j++) { |
| 3282 | AVRational std_fps = { get_std_framerate(j), 12 * 1001 }; |
| 3283 | double error = fabs(av_q2d(st->avg_frame_rate) / |
| 3284 | av_q2d(std_fps) - 1); |
| 3285 | |
| 3286 | if (error < best_error) { |
| 3287 | best_error = error; |
| 3288 | best_fps = std_fps.num; |
| 3289 | } |
| 3290 | } |
| 3291 | if (best_fps) |
| 3292 | av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
| 3293 | best_fps, 12 * 1001, INT_MAX); |
| 3294 | } |
| 3295 | |
| 3296 | if (!st->r_frame_rate.num) { |
| 3297 | if ( st->codec->time_base.den * (int64_t) st->time_base.num |
| 3298 | <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) { |
| 3299 | st->r_frame_rate.num = st->codec->time_base.den; |
| 3300 | st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; |
| 3301 | } else { |
| 3302 | st->r_frame_rate.num = st->time_base.den; |
| 3303 | st->r_frame_rate.den = st->time_base.num; |
| 3304 | } |
| 3305 | } |
| 3306 | } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| 3307 | if (!st->codec->bits_per_coded_sample) |
| 3308 | st->codec->bits_per_coded_sample = |
| 3309 | av_get_bits_per_sample(st->codec->codec_id); |
| 3310 | // set stream disposition based on audio service type |
| 3311 | switch (st->codec->audio_service_type) { |
| 3312 | case AV_AUDIO_SERVICE_TYPE_EFFECTS: |
| 3313 | st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; |
| 3314 | break; |
| 3315 | case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED: |
| 3316 | st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; |
| 3317 | break; |
| 3318 | case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED: |
| 3319 | st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; |
| 3320 | break; |
| 3321 | case AV_AUDIO_SERVICE_TYPE_COMMENTARY: |
| 3322 | st->disposition = AV_DISPOSITION_COMMENT; |
| 3323 | break; |
| 3324 | case AV_AUDIO_SERVICE_TYPE_KARAOKE: |
| 3325 | st->disposition = AV_DISPOSITION_KARAOKE; |
| 3326 | break; |
| 3327 | } |
| 3328 | } |
| 3329 | } |
| 3330 | |
| 3331 | if (probesize) |
| 3332 | estimate_timings(ic, old_offset); |
| 3333 | |
| 3334 | if (ret >= 0 && ic->nb_streams) |
| 3335 | /* We could not have all the codec parameters before EOF. */ |
| 3336 | ret = -1; |
| 3337 | for (i = 0; i < ic->nb_streams; i++) { |
| 3338 | const char *errmsg; |
| 3339 | st = ic->streams[i]; |
| 3340 | if (!has_codec_parameters(st, &errmsg)) { |
| 3341 | char buf[256]; |
| 3342 | avcodec_string(buf, sizeof(buf), st->codec, 0); |
| 3343 | av_log(ic, AV_LOG_WARNING, |
| 3344 | "Could not find codec parameters for stream %d (%s): %s\n" |
| 3345 | "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n", |
| 3346 | i, buf, errmsg); |
| 3347 | } else { |
| 3348 | ret = 0; |
| 3349 | } |
| 3350 | } |
| 3351 | |
| 3352 | compute_chapters_end(ic); |
| 3353 | |
| 3354 | find_stream_info_err: |
| 3355 | for (i = 0; i < ic->nb_streams; i++) { |
| 3356 | st = ic->streams[i]; |
| 3357 | if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO) |
| 3358 | ic->streams[i]->codec->thread_count = 0; |
| 3359 | if (st->info) |
| 3360 | av_freep(&st->info->duration_error); |
| 3361 | av_freep(&ic->streams[i]->info); |
| 3362 | } |
| 3363 | if (ic->pb) |
| 3364 | av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n", |
| 3365 | avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count); |
| 3366 | return ret; |
| 3367 | } |
| 3368 | |
| 3369 | AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s) |
| 3370 | { |
| 3371 | int i, j; |
| 3372 | |
| 3373 | for (i = 0; i < ic->nb_programs; i++) { |
| 3374 | if (ic->programs[i] == last) { |
| 3375 | last = NULL; |
| 3376 | } else { |
| 3377 | if (!last) |
| 3378 | for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++) |
| 3379 | if (ic->programs[i]->stream_index[j] == s) |
| 3380 | return ic->programs[i]; |
| 3381 | } |
| 3382 | } |
| 3383 | return NULL; |
| 3384 | } |
| 3385 | |
| 3386 | int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, |
| 3387 | int wanted_stream_nb, int related_stream, |
| 3388 | AVCodec **decoder_ret, int flags) |
| 3389 | { |
| 3390 | int i, nb_streams = ic->nb_streams; |
| 3391 | int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe; |
| 3392 | unsigned *program = NULL; |
| 3393 | const AVCodec *decoder = NULL, *best_decoder = NULL; |
| 3394 | |
| 3395 | if (related_stream >= 0 && wanted_stream_nb < 0) { |
| 3396 | AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream); |
| 3397 | if (p) { |
| 3398 | program = p->stream_index; |
| 3399 | nb_streams = p->nb_stream_indexes; |
| 3400 | } |
| 3401 | } |
| 3402 | for (i = 0; i < nb_streams; i++) { |
| 3403 | int real_stream_index = program ? program[i] : i; |
| 3404 | AVStream *st = ic->streams[real_stream_index]; |
| 3405 | AVCodecContext *avctx = st->codec; |
| 3406 | if (avctx->codec_type != type) |
| 3407 | continue; |
| 3408 | if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb) |
| 3409 | continue; |
| 3410 | if (wanted_stream_nb != real_stream_index && |
| 3411 | st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED | |
| 3412 | AV_DISPOSITION_VISUAL_IMPAIRED)) |
| 3413 | continue; |
| 3414 | if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels) |
| 3415 | continue; |
| 3416 | if (decoder_ret) { |
| 3417 | decoder = find_decoder(ic, st, st->codec->codec_id); |
| 3418 | if (!decoder) { |
| 3419 | if (ret < 0) |
| 3420 | ret = AVERROR_DECODER_NOT_FOUND; |
| 3421 | continue; |
| 3422 | } |
| 3423 | } |
| 3424 | count = st->codec_info_nb_frames; |
| 3425 | bitrate = avctx->bit_rate; |
| 3426 | if (!bitrate) |
| 3427 | bitrate = avctx->rc_max_rate; |
| 3428 | multiframe = FFMIN(5, count); |
| 3429 | if ((best_multiframe > multiframe) || |
| 3430 | (best_multiframe == multiframe && best_bitrate > bitrate) || |
| 3431 | (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count)) |
| 3432 | continue; |
| 3433 | best_count = count; |
| 3434 | best_bitrate = bitrate; |
| 3435 | best_multiframe = multiframe; |
| 3436 | ret = real_stream_index; |
| 3437 | best_decoder = decoder; |
| 3438 | if (program && i == nb_streams - 1 && ret < 0) { |
| 3439 | program = NULL; |
| 3440 | nb_streams = ic->nb_streams; |
| 3441 | /* no related stream found, try again with everything */ |
| 3442 | i = 0; |
| 3443 | } |
| 3444 | } |
| 3445 | if (decoder_ret) |
| 3446 | *decoder_ret = (AVCodec*)best_decoder; |
| 3447 | return ret; |
| 3448 | } |
| 3449 | |
| 3450 | /*******************************************************/ |
| 3451 | |
| 3452 | int av_read_play(AVFormatContext *s) |
| 3453 | { |
| 3454 | if (s->iformat->read_play) |
| 3455 | return s->iformat->read_play(s); |
| 3456 | if (s->pb) |
| 3457 | return avio_pause(s->pb, 0); |
| 3458 | return AVERROR(ENOSYS); |
| 3459 | } |
| 3460 | |
| 3461 | int av_read_pause(AVFormatContext *s) |
| 3462 | { |
| 3463 | if (s->iformat->read_pause) |
| 3464 | return s->iformat->read_pause(s); |
| 3465 | if (s->pb) |
| 3466 | return avio_pause(s->pb, 1); |
| 3467 | return AVERROR(ENOSYS); |
| 3468 | } |
| 3469 | |
| 3470 | void ff_free_stream(AVFormatContext *s, AVStream *st) { |
| 3471 | int j; |
| 3472 | av_assert0(s->nb_streams>0); |
| 3473 | av_assert0(s->streams[ s->nb_streams - 1 ] == st); |
| 3474 | |
| 3475 | for (j = 0; j < st->nb_side_data; j++) |
| 3476 | av_freep(&st->side_data[j].data); |
| 3477 | av_freep(&st->side_data); |
| 3478 | st->nb_side_data = 0; |
| 3479 | |
| 3480 | if (st->parser) { |
| 3481 | av_parser_close(st->parser); |
| 3482 | } |
| 3483 | if (st->attached_pic.data) |
| 3484 | av_free_packet(&st->attached_pic); |
| 3485 | av_dict_free(&st->metadata); |
| 3486 | av_freep(&st->probe_data.buf); |
| 3487 | av_freep(&st->index_entries); |
| 3488 | av_freep(&st->codec->extradata); |
| 3489 | av_freep(&st->codec->subtitle_header); |
| 3490 | av_freep(&st->codec); |
| 3491 | av_freep(&st->priv_data); |
| 3492 | if (st->info) |
| 3493 | av_freep(&st->info->duration_error); |
| 3494 | av_freep(&st->info); |
| 3495 | av_freep(&s->streams[ --s->nb_streams ]); |
| 3496 | } |
| 3497 | |
| 3498 | void avformat_free_context(AVFormatContext *s) |
| 3499 | { |
| 3500 | int i; |
| 3501 | |
| 3502 | if (!s) |
| 3503 | return; |
| 3504 | |
| 3505 | av_opt_free(s); |
| 3506 | if (s->iformat && s->iformat->priv_class && s->priv_data) |
| 3507 | av_opt_free(s->priv_data); |
| 3508 | if (s->oformat && s->oformat->priv_class && s->priv_data) |
| 3509 | av_opt_free(s->priv_data); |
| 3510 | |
| 3511 | for (i = s->nb_streams - 1; i >= 0; i--) { |
| 3512 | ff_free_stream(s, s->streams[i]); |
| 3513 | } |
| 3514 | for (i = s->nb_programs - 1; i >= 0; i--) { |
| 3515 | av_dict_free(&s->programs[i]->metadata); |
| 3516 | av_freep(&s->programs[i]->stream_index); |
| 3517 | av_freep(&s->programs[i]); |
| 3518 | } |
| 3519 | av_freep(&s->programs); |
| 3520 | av_freep(&s->priv_data); |
| 3521 | while (s->nb_chapters--) { |
| 3522 | av_dict_free(&s->chapters[s->nb_chapters]->metadata); |
| 3523 | av_freep(&s->chapters[s->nb_chapters]); |
| 3524 | } |
| 3525 | av_freep(&s->chapters); |
| 3526 | av_dict_free(&s->metadata); |
| 3527 | av_freep(&s->streams); |
| 3528 | av_freep(&s->internal); |
| 3529 | flush_packet_queue(s); |
| 3530 | av_free(s); |
| 3531 | } |
| 3532 | |
| 3533 | #if FF_API_CLOSE_INPUT_FILE |
| 3534 | void av_close_input_file(AVFormatContext *s) |
| 3535 | { |
| 3536 | avformat_close_input(&s); |
| 3537 | } |
| 3538 | #endif |
| 3539 | |
| 3540 | void avformat_close_input(AVFormatContext **ps) |
| 3541 | { |
| 3542 | AVFormatContext *s; |
| 3543 | AVIOContext *pb; |
| 3544 | |
| 3545 | if (!ps || !*ps) |
| 3546 | return; |
| 3547 | |
| 3548 | s = *ps; |
| 3549 | pb = s->pb; |
| 3550 | |
| 3551 | if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) || |
| 3552 | (s->flags & AVFMT_FLAG_CUSTOM_IO)) |
| 3553 | pb = NULL; |
| 3554 | |
| 3555 | flush_packet_queue(s); |
| 3556 | |
| 3557 | if (s->iformat) |
| 3558 | if (s->iformat->read_close) |
| 3559 | s->iformat->read_close(s); |
| 3560 | |
| 3561 | avformat_free_context(s); |
| 3562 | |
| 3563 | *ps = NULL; |
| 3564 | |
| 3565 | avio_close(pb); |
| 3566 | } |
| 3567 | |
| 3568 | #if FF_API_NEW_STREAM |
| 3569 | AVStream *av_new_stream(AVFormatContext *s, int id) |
| 3570 | { |
| 3571 | AVStream *st = avformat_new_stream(s, NULL); |
| 3572 | if (st) |
| 3573 | st->id = id; |
| 3574 | return st; |
| 3575 | } |
| 3576 | #endif |
| 3577 | |
| 3578 | AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c) |
| 3579 | { |
| 3580 | AVStream *st; |
| 3581 | int i; |
| 3582 | AVStream **streams; |
| 3583 | |
| 3584 | if (s->nb_streams >= INT_MAX/sizeof(*streams)) |
| 3585 | return NULL; |
| 3586 | streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams)); |
| 3587 | if (!streams) |
| 3588 | return NULL; |
| 3589 | s->streams = streams; |
| 3590 | |
| 3591 | st = av_mallocz(sizeof(AVStream)); |
| 3592 | if (!st) |
| 3593 | return NULL; |
| 3594 | if (!(st->info = av_mallocz(sizeof(*st->info)))) { |
| 3595 | av_free(st); |
| 3596 | return NULL; |
| 3597 | } |
| 3598 | st->info->last_dts = AV_NOPTS_VALUE; |
| 3599 | |
| 3600 | st->codec = avcodec_alloc_context3(c); |
| 3601 | if (s->iformat) { |
| 3602 | /* no default bitrate if decoding */ |
| 3603 | st->codec->bit_rate = 0; |
| 3604 | |
| 3605 | /* default pts setting is MPEG-like */ |
| 3606 | avpriv_set_pts_info(st, 33, 1, 90000); |
| 3607 | } |
| 3608 | |
| 3609 | st->index = s->nb_streams; |
| 3610 | st->start_time = AV_NOPTS_VALUE; |
| 3611 | st->duration = AV_NOPTS_VALUE; |
| 3612 | /* we set the current DTS to 0 so that formats without any timestamps |
| 3613 | * but durations get some timestamps, formats with some unknown |
| 3614 | * timestamps have their first few packets buffered and the |
| 3615 | * timestamps corrected before they are returned to the user */ |
| 3616 | st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0; |
| 3617 | st->first_dts = AV_NOPTS_VALUE; |
| 3618 | st->probe_packets = MAX_PROBE_PACKETS; |
| 3619 | st->pts_wrap_reference = AV_NOPTS_VALUE; |
| 3620 | st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; |
| 3621 | |
| 3622 | st->last_IP_pts = AV_NOPTS_VALUE; |
| 3623 | st->last_dts_for_order_check = AV_NOPTS_VALUE; |
| 3624 | for (i = 0; i < MAX_REORDER_DELAY + 1; i++) |
| 3625 | st->pts_buffer[i] = AV_NOPTS_VALUE; |
| 3626 | |
| 3627 | st->sample_aspect_ratio = (AVRational) { 0, 1 }; |
| 3628 | |
| 3629 | #if FF_API_R_FRAME_RATE |
| 3630 | st->info->last_dts = AV_NOPTS_VALUE; |
| 3631 | #endif |
| 3632 | st->info->fps_first_dts = AV_NOPTS_VALUE; |
| 3633 | st->info->fps_last_dts = AV_NOPTS_VALUE; |
| 3634 | |
| 3635 | st->inject_global_side_data = s->internal->inject_global_side_data; |
| 3636 | |
| 3637 | s->streams[s->nb_streams++] = st; |
| 3638 | return st; |
| 3639 | } |
| 3640 | |
| 3641 | AVProgram *av_new_program(AVFormatContext *ac, int id) |
| 3642 | { |
| 3643 | AVProgram *program = NULL; |
| 3644 | int i; |
| 3645 | |
| 3646 | av_dlog(ac, "new_program: id=0x%04x\n", id); |
| 3647 | |
| 3648 | for (i = 0; i < ac->nb_programs; i++) |
| 3649 | if (ac->programs[i]->id == id) |
| 3650 | program = ac->programs[i]; |
| 3651 | |
| 3652 | if (!program) { |
| 3653 | program = av_mallocz(sizeof(AVProgram)); |
| 3654 | if (!program) |
| 3655 | return NULL; |
| 3656 | dynarray_add(&ac->programs, &ac->nb_programs, program); |
| 3657 | program->discard = AVDISCARD_NONE; |
| 3658 | } |
| 3659 | program->id = id; |
| 3660 | program->pts_wrap_reference = AV_NOPTS_VALUE; |
| 3661 | program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; |
| 3662 | |
| 3663 | program->start_time = |
| 3664 | program->end_time = AV_NOPTS_VALUE; |
| 3665 | |
| 3666 | return program; |
| 3667 | } |
| 3668 | |
| 3669 | AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, |
| 3670 | int64_t start, int64_t end, const char *title) |
| 3671 | { |
| 3672 | AVChapter *chapter = NULL; |
| 3673 | int i; |
| 3674 | |
| 3675 | if (end != AV_NOPTS_VALUE && start > end) { |
| 3676 | av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start); |
| 3677 | return NULL; |
| 3678 | } |
| 3679 | |
| 3680 | for (i = 0; i < s->nb_chapters; i++) |
| 3681 | if (s->chapters[i]->id == id) |
| 3682 | chapter = s->chapters[i]; |
| 3683 | |
| 3684 | if (!chapter) { |
| 3685 | chapter = av_mallocz(sizeof(AVChapter)); |
| 3686 | if (!chapter) |
| 3687 | return NULL; |
| 3688 | dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
| 3689 | } |
| 3690 | av_dict_set(&chapter->metadata, "title", title, 0); |
| 3691 | chapter->id = id; |
| 3692 | chapter->time_base = time_base; |
| 3693 | chapter->start = start; |
| 3694 | chapter->end = end; |
| 3695 | |
| 3696 | return chapter; |
| 3697 | } |
| 3698 | |
| 3699 | void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx) |
| 3700 | { |
| 3701 | int i, j; |
| 3702 | AVProgram *program = NULL; |
| 3703 | void *tmp; |
| 3704 | |
| 3705 | if (idx >= ac->nb_streams) { |
| 3706 | av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx); |
| 3707 | return; |
| 3708 | } |
| 3709 | |
| 3710 | for (i = 0; i < ac->nb_programs; i++) { |
| 3711 | if (ac->programs[i]->id != progid) |
| 3712 | continue; |
| 3713 | program = ac->programs[i]; |
| 3714 | for (j = 0; j < program->nb_stream_indexes; j++) |
| 3715 | if (program->stream_index[j] == idx) |
| 3716 | return; |
| 3717 | |
| 3718 | tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int)); |
| 3719 | if (!tmp) |
| 3720 | return; |
| 3721 | program->stream_index = tmp; |
| 3722 | program->stream_index[program->nb_stream_indexes++] = idx; |
| 3723 | return; |
| 3724 | } |
| 3725 | } |
| 3726 | |
| 3727 | uint64_t ff_ntp_time(void) |
| 3728 | { |
| 3729 | return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US; |
| 3730 | } |
| 3731 | |
| 3732 | int av_get_frame_filename(char *buf, int buf_size, const char *path, int number) |
| 3733 | { |
| 3734 | const char *p; |
| 3735 | char *q, buf1[20], c; |
| 3736 | int nd, len, percentd_found; |
| 3737 | |
| 3738 | q = buf; |
| 3739 | p = path; |
| 3740 | percentd_found = 0; |
| 3741 | for (;;) { |
| 3742 | c = *p++; |
| 3743 | if (c == '\0') |
| 3744 | break; |
| 3745 | if (c == '%') { |
| 3746 | do { |
| 3747 | nd = 0; |
| 3748 | while (av_isdigit(*p)) |
| 3749 | nd = nd * 10 + *p++ - '0'; |
| 3750 | c = *p++; |
| 3751 | } while (av_isdigit(c)); |
| 3752 | |
| 3753 | switch (c) { |
| 3754 | case '%': |
| 3755 | goto addchar; |
| 3756 | case 'd': |
| 3757 | if (percentd_found) |
| 3758 | goto fail; |
| 3759 | percentd_found = 1; |
| 3760 | snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
| 3761 | len = strlen(buf1); |
| 3762 | if ((q - buf + len) > buf_size - 1) |
| 3763 | goto fail; |
| 3764 | memcpy(q, buf1, len); |
| 3765 | q += len; |
| 3766 | break; |
| 3767 | default: |
| 3768 | goto fail; |
| 3769 | } |
| 3770 | } else { |
| 3771 | addchar: |
| 3772 | if ((q - buf) < buf_size - 1) |
| 3773 | *q++ = c; |
| 3774 | } |
| 3775 | } |
| 3776 | if (!percentd_found) |
| 3777 | goto fail; |
| 3778 | *q = '\0'; |
| 3779 | return 0; |
| 3780 | fail: |
| 3781 | *q = '\0'; |
| 3782 | return -1; |
| 3783 | } |
| 3784 | |
| 3785 | void av_url_split(char *proto, int proto_size, |
| 3786 | char *authorization, int authorization_size, |
| 3787 | char *hostname, int hostname_size, |
| 3788 | int *port_ptr, char *path, int path_size, const char *url) |
| 3789 | { |
| 3790 | const char *p, *ls, *ls2, *at, *at2, *col, *brk; |
| 3791 | |
| 3792 | if (port_ptr) |
| 3793 | *port_ptr = -1; |
| 3794 | if (proto_size > 0) |
| 3795 | proto[0] = 0; |
| 3796 | if (authorization_size > 0) |
| 3797 | authorization[0] = 0; |
| 3798 | if (hostname_size > 0) |
| 3799 | hostname[0] = 0; |
| 3800 | if (path_size > 0) |
| 3801 | path[0] = 0; |
| 3802 | |
| 3803 | /* parse protocol */ |
| 3804 | if ((p = strchr(url, ':'))) { |
| 3805 | av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url)); |
| 3806 | p++; /* skip ':' */ |
| 3807 | if (*p == '/') |
| 3808 | p++; |
| 3809 | if (*p == '/') |
| 3810 | p++; |
| 3811 | } else { |
| 3812 | /* no protocol means plain filename */ |
| 3813 | av_strlcpy(path, url, path_size); |
| 3814 | return; |
| 3815 | } |
| 3816 | |
| 3817 | /* separate path from hostname */ |
| 3818 | ls = strchr(p, '/'); |
| 3819 | ls2 = strchr(p, '?'); |
| 3820 | if (!ls) |
| 3821 | ls = ls2; |
| 3822 | else if (ls && ls2) |
| 3823 | ls = FFMIN(ls, ls2); |
| 3824 | if (ls) |
| 3825 | av_strlcpy(path, ls, path_size); |
| 3826 | else |
| 3827 | ls = &p[strlen(p)]; // XXX |
| 3828 | |
| 3829 | /* the rest is hostname, use that to parse auth/port */ |
| 3830 | if (ls != p) { |
| 3831 | /* authorization (user[:pass]@hostname) */ |
| 3832 | at2 = p; |
| 3833 | while ((at = strchr(p, '@')) && at < ls) { |
| 3834 | av_strlcpy(authorization, at2, |
| 3835 | FFMIN(authorization_size, at + 1 - at2)); |
| 3836 | p = at + 1; /* skip '@' */ |
| 3837 | } |
| 3838 | |
| 3839 | if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
| 3840 | /* [host]:port */ |
| 3841 | av_strlcpy(hostname, p + 1, |
| 3842 | FFMIN(hostname_size, brk - p)); |
| 3843 | if (brk[1] == ':' && port_ptr) |
| 3844 | *port_ptr = atoi(brk + 2); |
| 3845 | } else if ((col = strchr(p, ':')) && col < ls) { |
| 3846 | av_strlcpy(hostname, p, |
| 3847 | FFMIN(col + 1 - p, hostname_size)); |
| 3848 | if (port_ptr) |
| 3849 | *port_ptr = atoi(col + 1); |
| 3850 | } else |
| 3851 | av_strlcpy(hostname, p, |
| 3852 | FFMIN(ls + 1 - p, hostname_size)); |
| 3853 | } |
| 3854 | } |
| 3855 | |
| 3856 | char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase) |
| 3857 | { |
| 3858 | int i; |
| 3859 | static const char hex_table_uc[16] = { '0', '1', '2', '3', |
| 3860 | '4', '5', '6', '7', |
| 3861 | '8', '9', 'A', 'B', |
| 3862 | 'C', 'D', 'E', 'F' }; |
| 3863 | static const char hex_table_lc[16] = { '0', '1', '2', '3', |
| 3864 | '4', '5', '6', '7', |
| 3865 | '8', '9', 'a', 'b', |
| 3866 | 'c', 'd', 'e', 'f' }; |
| 3867 | const char *hex_table = lowercase ? hex_table_lc : hex_table_uc; |
| 3868 | |
| 3869 | for (i = 0; i < s; i++) { |
| 3870 | buff[i * 2] = hex_table[src[i] >> 4]; |
| 3871 | buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
| 3872 | } |
| 3873 | |
| 3874 | return buff; |
| 3875 | } |
| 3876 | |
| 3877 | int ff_hex_to_data(uint8_t *data, const char *p) |
| 3878 | { |
| 3879 | int c, len, v; |
| 3880 | |
| 3881 | len = 0; |
| 3882 | v = 1; |
| 3883 | for (;;) { |
| 3884 | p += strspn(p, SPACE_CHARS); |
| 3885 | if (*p == '\0') |
| 3886 | break; |
| 3887 | c = av_toupper((unsigned char) *p++); |
| 3888 | if (c >= '0' && c <= '9') |
| 3889 | c = c - '0'; |
| 3890 | else if (c >= 'A' && c <= 'F') |
| 3891 | c = c - 'A' + 10; |
| 3892 | else |
| 3893 | break; |
| 3894 | v = (v << 4) | c; |
| 3895 | if (v & 0x100) { |
| 3896 | if (data) |
| 3897 | data[len] = v; |
| 3898 | len++; |
| 3899 | v = 1; |
| 3900 | } |
| 3901 | } |
| 3902 | return len; |
| 3903 | } |
| 3904 | |
| 3905 | #if FF_API_SET_PTS_INFO |
| 3906 | void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
| 3907 | unsigned int pts_num, unsigned int pts_den) |
| 3908 | { |
| 3909 | avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den); |
| 3910 | } |
| 3911 | #endif |
| 3912 | |
| 3913 | void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, |
| 3914 | unsigned int pts_num, unsigned int pts_den) |
| 3915 | { |
| 3916 | AVRational new_tb; |
| 3917 | if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) { |
| 3918 | if (new_tb.num != pts_num) |
| 3919 | av_log(NULL, AV_LOG_DEBUG, |
| 3920 | "st:%d removing common factor %d from timebase\n", |
| 3921 | s->index, pts_num / new_tb.num); |
| 3922 | } else |
| 3923 | av_log(NULL, AV_LOG_WARNING, |
| 3924 | "st:%d has too large timebase, reducing\n", s->index); |
| 3925 | |
| 3926 | if (new_tb.num <= 0 || new_tb.den <= 0) { |
| 3927 | av_log(NULL, AV_LOG_ERROR, |
| 3928 | "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", |
| 3929 | new_tb.num, new_tb.den, |
| 3930 | s->index); |
| 3931 | return; |
| 3932 | } |
| 3933 | s->time_base = new_tb; |
| 3934 | av_codec_set_pkt_timebase(s->codec, new_tb); |
| 3935 | s->pts_wrap_bits = pts_wrap_bits; |
| 3936 | } |
| 3937 | |
| 3938 | void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, |
| 3939 | void *context) |
| 3940 | { |
| 3941 | const char *ptr = str; |
| 3942 | |
| 3943 | /* Parse key=value pairs. */ |
| 3944 | for (;;) { |
| 3945 | const char *key; |
| 3946 | char *dest = NULL, *dest_end; |
| 3947 | int key_len, dest_len = 0; |
| 3948 | |
| 3949 | /* Skip whitespace and potential commas. */ |
| 3950 | while (*ptr && (av_isspace(*ptr) || *ptr == ',')) |
| 3951 | ptr++; |
| 3952 | if (!*ptr) |
| 3953 | break; |
| 3954 | |
| 3955 | key = ptr; |
| 3956 | |
| 3957 | if (!(ptr = strchr(key, '='))) |
| 3958 | break; |
| 3959 | ptr++; |
| 3960 | key_len = ptr - key; |
| 3961 | |
| 3962 | callback_get_buf(context, key, key_len, &dest, &dest_len); |
| 3963 | dest_end = dest + dest_len - 1; |
| 3964 | |
| 3965 | if (*ptr == '\"') { |
| 3966 | ptr++; |
| 3967 | while (*ptr && *ptr != '\"') { |
| 3968 | if (*ptr == '\\') { |
| 3969 | if (!ptr[1]) |
| 3970 | break; |
| 3971 | if (dest && dest < dest_end) |
| 3972 | *dest++ = ptr[1]; |
| 3973 | ptr += 2; |
| 3974 | } else { |
| 3975 | if (dest && dest < dest_end) |
| 3976 | *dest++ = *ptr; |
| 3977 | ptr++; |
| 3978 | } |
| 3979 | } |
| 3980 | if (*ptr == '\"') |
| 3981 | ptr++; |
| 3982 | } else { |
| 3983 | for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++) |
| 3984 | if (dest && dest < dest_end) |
| 3985 | *dest++ = *ptr; |
| 3986 | } |
| 3987 | if (dest) |
| 3988 | *dest = 0; |
| 3989 | } |
| 3990 | } |
| 3991 | |
| 3992 | int ff_find_stream_index(AVFormatContext *s, int id) |
| 3993 | { |
| 3994 | int i; |
| 3995 | for (i = 0; i < s->nb_streams; i++) |
| 3996 | if (s->streams[i]->id == id) |
| 3997 | return i; |
| 3998 | return -1; |
| 3999 | } |
| 4000 | |
| 4001 | int64_t ff_iso8601_to_unix_time(const char *datestr) |
| 4002 | { |
| 4003 | struct tm time1 = { 0 }, time2 = { 0 }; |
| 4004 | char *ret1, *ret2; |
| 4005 | ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1); |
| 4006 | ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2); |
| 4007 | if (ret2 && !ret1) |
| 4008 | return av_timegm(&time2); |
| 4009 | else |
| 4010 | return av_timegm(&time1); |
| 4011 | } |
| 4012 | |
| 4013 | int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id, |
| 4014 | int std_compliance) |
| 4015 | { |
| 4016 | if (ofmt) { |
| 4017 | if (ofmt->query_codec) |
| 4018 | return ofmt->query_codec(codec_id, std_compliance); |
| 4019 | else if (ofmt->codec_tag) |
| 4020 | return !!av_codec_get_tag(ofmt->codec_tag, codec_id); |
| 4021 | else if (codec_id == ofmt->video_codec || |
| 4022 | codec_id == ofmt->audio_codec || |
| 4023 | codec_id == ofmt->subtitle_codec) |
| 4024 | return 1; |
| 4025 | } |
| 4026 | return AVERROR_PATCHWELCOME; |
| 4027 | } |
| 4028 | |
| 4029 | int avformat_network_init(void) |
| 4030 | { |
| 4031 | #if CONFIG_NETWORK |
| 4032 | int ret; |
| 4033 | ff_network_inited_globally = 1; |
| 4034 | if ((ret = ff_network_init()) < 0) |
| 4035 | return ret; |
| 4036 | ff_tls_init(); |
| 4037 | #endif |
| 4038 | return 0; |
| 4039 | } |
| 4040 | |
| 4041 | int avformat_network_deinit(void) |
| 4042 | { |
| 4043 | #if CONFIG_NETWORK |
| 4044 | ff_network_close(); |
| 4045 | ff_tls_deinit(); |
| 4046 | #endif |
| 4047 | return 0; |
| 4048 | } |
| 4049 | |
| 4050 | int ff_add_param_change(AVPacket *pkt, int32_t channels, |
| 4051 | uint64_t channel_layout, int32_t sample_rate, |
| 4052 | int32_t width, int32_t height) |
| 4053 | { |
| 4054 | uint32_t flags = 0; |
| 4055 | int size = 4; |
| 4056 | uint8_t *data; |
| 4057 | if (!pkt) |
| 4058 | return AVERROR(EINVAL); |
| 4059 | if (channels) { |
| 4060 | size += 4; |
| 4061 | flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT; |
| 4062 | } |
| 4063 | if (channel_layout) { |
| 4064 | size += 8; |
| 4065 | flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT; |
| 4066 | } |
| 4067 | if (sample_rate) { |
| 4068 | size += 4; |
| 4069 | flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE; |
| 4070 | } |
| 4071 | if (width || height) { |
| 4072 | size += 8; |
| 4073 | flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS; |
| 4074 | } |
| 4075 | data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size); |
| 4076 | if (!data) |
| 4077 | return AVERROR(ENOMEM); |
| 4078 | bytestream_put_le32(&data, flags); |
| 4079 | if (channels) |
| 4080 | bytestream_put_le32(&data, channels); |
| 4081 | if (channel_layout) |
| 4082 | bytestream_put_le64(&data, channel_layout); |
| 4083 | if (sample_rate) |
| 4084 | bytestream_put_le32(&data, sample_rate); |
| 4085 | if (width || height) { |
| 4086 | bytestream_put_le32(&data, width); |
| 4087 | bytestream_put_le32(&data, height); |
| 4088 | } |
| 4089 | return 0; |
| 4090 | } |
| 4091 | |
| 4092 | AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame) |
| 4093 | { |
| 4094 | AVRational undef = {0, 1}; |
| 4095 | AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef; |
| 4096 | AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef; |
| 4097 | AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio; |
| 4098 | |
| 4099 | av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den, |
| 4100 | stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX); |
| 4101 | if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0) |
| 4102 | stream_sample_aspect_ratio = undef; |
| 4103 | |
| 4104 | av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den, |
| 4105 | frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX); |
| 4106 | if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0) |
| 4107 | frame_sample_aspect_ratio = undef; |
| 4108 | |
| 4109 | if (stream_sample_aspect_ratio.num) |
| 4110 | return stream_sample_aspect_ratio; |
| 4111 | else |
| 4112 | return frame_sample_aspect_ratio; |
| 4113 | } |
| 4114 | |
| 4115 | AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame) |
| 4116 | { |
| 4117 | AVRational fr = st->r_frame_rate; |
| 4118 | AVRational codec_fr = av_inv_q(st->codec->time_base); |
| 4119 | AVRational avg_fr = st->avg_frame_rate; |
| 4120 | |
| 4121 | if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 && |
| 4122 | av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) { |
| 4123 | fr = avg_fr; |
| 4124 | } |
| 4125 | |
| 4126 | |
| 4127 | if (st->codec->ticks_per_frame > 1) { |
| 4128 | codec_fr.den *= st->codec->ticks_per_frame; |
| 4129 | if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7 |
| 4130 | && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1) |
| 4131 | fr = codec_fr; |
| 4132 | } |
| 4133 | |
| 4134 | return fr; |
| 4135 | } |
| 4136 | |
| 4137 | int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, |
| 4138 | const char *spec) |
| 4139 | { |
| 4140 | if (*spec <= '9' && *spec >= '0') /* opt:index */ |
| 4141 | return strtol(spec, NULL, 0) == st->index; |
| 4142 | else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' || |
| 4143 | *spec == 't') { /* opt:[vasdt] */ |
| 4144 | enum AVMediaType type; |
| 4145 | |
| 4146 | switch (*spec++) { |
| 4147 | case 'v': type = AVMEDIA_TYPE_VIDEO; break; |
| 4148 | case 'a': type = AVMEDIA_TYPE_AUDIO; break; |
| 4149 | case 's': type = AVMEDIA_TYPE_SUBTITLE; break; |
| 4150 | case 'd': type = AVMEDIA_TYPE_DATA; break; |
| 4151 | case 't': type = AVMEDIA_TYPE_ATTACHMENT; break; |
| 4152 | default: av_assert0(0); |
| 4153 | } |
| 4154 | if (type != st->codec->codec_type) |
| 4155 | return 0; |
| 4156 | if (*spec++ == ':') { /* possibly followed by :index */ |
| 4157 | int i, index = strtol(spec, NULL, 0); |
| 4158 | for (i = 0; i < s->nb_streams; i++) |
| 4159 | if (s->streams[i]->codec->codec_type == type && index-- == 0) |
| 4160 | return i == st->index; |
| 4161 | return 0; |
| 4162 | } |
| 4163 | return 1; |
| 4164 | } else if (*spec == 'p' && *(spec + 1) == ':') { |
| 4165 | int prog_id, i, j; |
| 4166 | char *endptr; |
| 4167 | spec += 2; |
| 4168 | prog_id = strtol(spec, &endptr, 0); |
| 4169 | for (i = 0; i < s->nb_programs; i++) { |
| 4170 | if (s->programs[i]->id != prog_id) |
| 4171 | continue; |
| 4172 | |
| 4173 | if (*endptr++ == ':') { |
| 4174 | int stream_idx = strtol(endptr, NULL, 0); |
| 4175 | return stream_idx >= 0 && |
| 4176 | stream_idx < s->programs[i]->nb_stream_indexes && |
| 4177 | st->index == s->programs[i]->stream_index[stream_idx]; |
| 4178 | } |
| 4179 | |
| 4180 | for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) |
| 4181 | if (st->index == s->programs[i]->stream_index[j]) |
| 4182 | return 1; |
| 4183 | } |
| 4184 | return 0; |
| 4185 | } else if (*spec == '#' || |
| 4186 | (*spec == 'i' && *(spec + 1) == ':')) { |
| 4187 | int stream_id; |
| 4188 | char *endptr; |
| 4189 | spec += 1 + (*spec == 'i'); |
| 4190 | stream_id = strtol(spec, &endptr, 0); |
| 4191 | if (!*endptr) |
| 4192 | return stream_id == st->id; |
| 4193 | } else if (*spec == 'm' && *(spec + 1) == ':') { |
| 4194 | AVDictionaryEntry *tag; |
| 4195 | char *key, *val; |
| 4196 | int ret; |
| 4197 | |
| 4198 | spec += 2; |
| 4199 | val = strchr(spec, ':'); |
| 4200 | |
| 4201 | key = val ? av_strndup(spec, val - spec) : av_strdup(spec); |
| 4202 | if (!key) |
| 4203 | return AVERROR(ENOMEM); |
| 4204 | |
| 4205 | tag = av_dict_get(st->metadata, key, NULL, 0); |
| 4206 | if (tag) { |
| 4207 | if (!val || !strcmp(tag->value, val + 1)) |
| 4208 | ret = 1; |
| 4209 | else |
| 4210 | ret = 0; |
| 4211 | } else |
| 4212 | ret = 0; |
| 4213 | |
| 4214 | av_freep(&key); |
| 4215 | return ret; |
| 4216 | } else if (!*spec) /* empty specifier, matches everything */ |
| 4217 | return 1; |
| 4218 | |
| 4219 | av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec); |
| 4220 | return AVERROR(EINVAL); |
| 4221 | } |
| 4222 | |
| 4223 | int ff_generate_avci_extradata(AVStream *st) |
| 4224 | { |
| 4225 | static const uint8_t avci100_1080p_extradata[] = { |
| 4226 | // SPS |
| 4227 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
| 4228 | 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, |
| 4229 | 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, |
| 4230 | 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e, |
| 4231 | 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8, |
| 4232 | 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2, |
| 4233 | 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00, |
| 4234 | 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca, |
| 4235 | 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 4236 | // PPS |
| 4237 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, |
| 4238 | 0xd0 |
| 4239 | }; |
| 4240 | static const uint8_t avci100_1080i_extradata[] = { |
| 4241 | // SPS |
| 4242 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
| 4243 | 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, |
| 4244 | 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, |
| 4245 | 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65, |
| 4246 | 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26, |
| 4247 | 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50, |
| 4248 | 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e, |
| 4249 | 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28, |
| 4250 | 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0, |
| 4251 | 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03, |
| 4252 | 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00, |
| 4253 | // PPS |
| 4254 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, |
| 4255 | 0xd0 |
| 4256 | }; |
| 4257 | static const uint8_t avci50_1080i_extradata[] = { |
| 4258 | // SPS |
| 4259 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28, |
| 4260 | 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, |
| 4261 | 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, |
| 4262 | 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61, |
| 4263 | 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06, |
| 4264 | 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63, |
| 4265 | 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19, |
| 4266 | 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16, |
| 4267 | 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01, |
| 4268 | 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03, |
| 4269 | 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00, |
| 4270 | // PPS |
| 4271 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, |
| 4272 | 0x11 |
| 4273 | }; |
| 4274 | static const uint8_t avci100_720p_extradata[] = { |
| 4275 | // SPS |
| 4276 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
| 4277 | 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62, |
| 4278 | 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5, |
| 4279 | 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8, |
| 4280 | 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95, |
| 4281 | 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43, |
| 4282 | 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01, |
| 4283 | 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05, |
| 4284 | 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03, |
| 4285 | 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 4286 | // PPS |
| 4287 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12, |
| 4288 | 0x11 |
| 4289 | }; |
| 4290 | |
| 4291 | const uint8_t *data = NULL; |
| 4292 | int size = 0; |
| 4293 | |
| 4294 | if (st->codec->width == 1920) { |
| 4295 | if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { |
| 4296 | data = avci100_1080p_extradata; |
| 4297 | size = sizeof(avci100_1080p_extradata); |
| 4298 | } else { |
| 4299 | data = avci100_1080i_extradata; |
| 4300 | size = sizeof(avci100_1080i_extradata); |
| 4301 | } |
| 4302 | } else if (st->codec->width == 1440) { |
| 4303 | data = avci50_1080i_extradata; |
| 4304 | size = sizeof(avci50_1080i_extradata); |
| 4305 | } else if (st->codec->width == 1280) { |
| 4306 | data = avci100_720p_extradata; |
| 4307 | size = sizeof(avci100_720p_extradata); |
| 4308 | } |
| 4309 | |
| 4310 | if (!size) |
| 4311 | return 0; |
| 4312 | |
| 4313 | av_freep(&st->codec->extradata); |
| 4314 | if (ff_alloc_extradata(st->codec, size)) |
| 4315 | return AVERROR(ENOMEM); |
| 4316 | memcpy(st->codec->extradata, data, size); |
| 4317 | |
| 4318 | return 0; |
| 4319 | } |
| 4320 | |
| 4321 | uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type, |
| 4322 | int *size) |
| 4323 | { |
| 4324 | int i; |
| 4325 | |
| 4326 | for (i = 0; i < st->nb_side_data; i++) { |
| 4327 | if (st->side_data[i].type == type) { |
| 4328 | if (size) |
| 4329 | *size = st->side_data[i].size; |
| 4330 | return st->side_data[i].data; |
| 4331 | } |
| 4332 | } |
| 4333 | return NULL; |
| 4334 | } |