2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/parseutils.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/thread.h"
36 #include "libavutil/time.h"
37 #include "libavutil/time_internal.h"
38 #include "libavutil/timestamp.h"
40 #include "libavcodec/bytestream.h"
41 #include "libavcodec/internal.h"
42 #include "libavcodec/raw.h"
44 #include "audiointerleave.h"
46 #include "avio_internal.h"
56 #include "libavutil/ffversion.h"
57 const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
59 static AVMutex avformat_mutex = AV_MUTEX_INITIALIZER;
63 * various utility functions for use within FFmpeg
66 unsigned avformat_version(void)
68 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
69 return LIBAVFORMAT_VERSION_INT;
72 const char *avformat_configuration(void)
74 return FFMPEG_CONFIGURATION;
77 const char *avformat_license(void)
79 #define LICENSE_PREFIX "libavformat license: "
80 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
83 int ff_lock_avformat(void)
85 return ff_mutex_lock(&avformat_mutex) ? -1 : 0;
88 int ff_unlock_avformat(void)
90 return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
93 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
95 static int is_relative(int64_t ts) {
96 return ts > (RELATIVE_TS_BASE - (1LL<<48));
100 * Wrap a given time stamp, if there is an indication for an overflow
103 * @param timestamp the time stamp to wrap
104 * @return resulting time stamp
106 static int64_t wrap_timestamp(const AVStream *st, int64_t timestamp)
108 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
109 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
110 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
111 timestamp < st->pts_wrap_reference)
112 return timestamp + (1ULL << st->pts_wrap_bits);
113 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
114 timestamp >= st->pts_wrap_reference)
115 return timestamp - (1ULL << st->pts_wrap_bits);
120 #if FF_API_FORMAT_GET_SET
121 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
122 #if FF_API_LAVF_FFSERVER
123 FF_DISABLE_DEPRECATION_WARNINGS
124 MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration)
125 FF_ENABLE_DEPRECATION_WARNINGS
127 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
128 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
129 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
130 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, data_codec)
131 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
132 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
133 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
134 #if FF_API_OLD_OPEN_CALLBACKS
135 FF_DISABLE_DEPRECATION_WARNINGS
136 MAKE_ACCESSORS(AVFormatContext, format, AVOpenCallback, open_cb)
137 FF_ENABLE_DEPRECATION_WARNINGS
141 int64_t av_stream_get_end_pts(const AVStream *st)
143 if (st->internal->priv_pts) {
144 return st->internal->priv_pts->val;
146 return AV_NOPTS_VALUE;
149 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
154 void av_format_inject_global_side_data(AVFormatContext *s)
157 s->internal->inject_global_side_data = 1;
158 for (i = 0; i < s->nb_streams; i++) {
159 AVStream *st = s->streams[i];
160 st->inject_global_side_data = 1;
164 int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
166 av_assert0(!dst->codec_whitelist &&
167 !dst->format_whitelist &&
168 !dst->protocol_whitelist &&
169 !dst->protocol_blacklist);
170 dst-> codec_whitelist = av_strdup(src->codec_whitelist);
171 dst->format_whitelist = av_strdup(src->format_whitelist);
172 dst->protocol_whitelist = av_strdup(src->protocol_whitelist);
173 dst->protocol_blacklist = av_strdup(src->protocol_blacklist);
174 if ( (src-> codec_whitelist && !dst-> codec_whitelist)
175 || (src-> format_whitelist && !dst-> format_whitelist)
176 || (src->protocol_whitelist && !dst->protocol_whitelist)
177 || (src->protocol_blacklist && !dst->protocol_blacklist)) {
178 av_log(dst, AV_LOG_ERROR, "Failed to duplicate black/whitelist\n");
179 return AVERROR(ENOMEM);
184 static const AVCodec *find_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
186 #if FF_API_LAVF_AVCTX
187 FF_DISABLE_DEPRECATION_WARNINGS
188 if (st->codec->codec)
189 return st->codec->codec;
190 FF_ENABLE_DEPRECATION_WARNINGS
193 switch (st->codecpar->codec_type) {
194 case AVMEDIA_TYPE_VIDEO:
195 if (s->video_codec) return s->video_codec;
197 case AVMEDIA_TYPE_AUDIO:
198 if (s->audio_codec) return s->audio_codec;
200 case AVMEDIA_TYPE_SUBTITLE:
201 if (s->subtitle_codec) return s->subtitle_codec;
205 return avcodec_find_decoder(codec_id);
208 static const AVCodec *find_probe_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
210 const AVCodec *codec;
212 #if CONFIG_H264_DECODER
213 /* Other parts of the code assume this decoder to be used for h264,
214 * so force it if possible. */
215 if (codec_id == AV_CODEC_ID_H264)
216 return avcodec_find_decoder_by_name("h264");
219 codec = find_decoder(s, st, codec_id);
223 if (codec->capabilities & AV_CODEC_CAP_AVOID_PROBING) {
224 const AVCodec *probe_codec = NULL;
225 while (probe_codec = av_codec_next(probe_codec)) {
226 if (probe_codec->id == codec_id &&
227 av_codec_is_decoder(probe_codec) &&
228 !(probe_codec->capabilities & (AV_CODEC_CAP_AVOID_PROBING | AV_CODEC_CAP_EXPERIMENTAL))) {
237 #if FF_API_FORMAT_GET_SET
238 int av_format_get_probe_score(const AVFormatContext *s)
240 return s->probe_score;
244 /* an arbitrarily chosen "sane" max packet size -- 50M */
245 #define SANE_CHUNK_SIZE (50000000)
247 int ffio_limit(AVIOContext *s, int size)
249 if (s->maxsize>= 0) {
250 int64_t remaining= s->maxsize - avio_tell(s);
251 if (remaining < size) {
252 int64_t newsize = avio_size(s);
253 if (!s->maxsize || s->maxsize<newsize)
254 s->maxsize = newsize - !newsize;
255 remaining= s->maxsize - avio_tell(s);
256 remaining= FFMAX(remaining, 0);
259 if (s->maxsize>= 0 && remaining+1 < size) {
260 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
267 /* Read the data in sane-sized chunks and append to pkt.
268 * Return the number of bytes read or an error. */
269 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
271 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
272 int orig_size = pkt->size;
276 int prev_size = pkt->size;
279 /* When the caller requests a lot of data, limit it to the amount
280 * left in file or SANE_CHUNK_SIZE when it is not known. */
282 if (read_size > SANE_CHUNK_SIZE/10) {
283 read_size = ffio_limit(s, read_size);
284 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
286 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
289 ret = av_grow_packet(pkt, read_size);
293 ret = avio_read(s, pkt->data + prev_size, read_size);
294 if (ret != read_size) {
295 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
302 pkt->flags |= AV_PKT_FLAG_CORRUPT;
306 av_packet_unref(pkt);
307 return pkt->size > orig_size ? pkt->size - orig_size : ret;
310 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
315 pkt->pos = avio_tell(s);
317 return append_packet_chunked(s, pkt, size);
320 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
323 return av_get_packet(s, pkt, size);
324 return append_packet_chunked(s, pkt, size);
327 int av_filename_number_test(const char *filename)
331 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
334 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
337 static const struct {
340 enum AVMediaType type;
342 { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
343 { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
344 { "aptx", AV_CODEC_ID_APTX, AVMEDIA_TYPE_AUDIO },
345 { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
346 { "dvbsub", AV_CODEC_ID_DVB_SUBTITLE,AVMEDIA_TYPE_SUBTITLE },
347 { "dvbtxt", AV_CODEC_ID_DVB_TELETEXT,AVMEDIA_TYPE_SUBTITLE },
348 { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
349 { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
350 { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
351 { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
352 { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
353 { "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
354 { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
355 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
356 { "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
360 const AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
364 av_log(s, AV_LOG_DEBUG,
365 "Probe with size=%d, packets=%d detected %s with score=%d\n",
366 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
368 for (i = 0; fmt_id_type[i].name; i++) {
369 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
370 if (fmt_id_type[i].type != AVMEDIA_TYPE_AUDIO &&
371 st->codecpar->sample_rate)
373 if (st->request_probe > score &&
374 st->codecpar->codec_id != fmt_id_type[i].id)
376 st->codecpar->codec_id = fmt_id_type[i].id;
377 st->codecpar->codec_type = fmt_id_type[i].type;
378 st->internal->need_context_update = 1;
379 #if FF_API_LAVF_AVCTX
380 FF_DISABLE_DEPRECATION_WARNINGS
381 st->codec->codec_type = st->codecpar->codec_type;
382 st->codec->codec_id = st->codecpar->codec_id;
383 FF_ENABLE_DEPRECATION_WARNINGS
392 /************************************************************/
393 /* input media file */
395 int av_demuxer_open(AVFormatContext *ic) {
398 if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) {
399 av_log(ic, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", ic->format_whitelist);
400 return AVERROR(EINVAL);
403 if (ic->iformat->read_header) {
404 err = ic->iformat->read_header(ic);
409 if (ic->pb && !ic->internal->data_offset)
410 ic->internal->data_offset = avio_tell(ic->pb);
415 /* Open input file and probe the format if necessary. */
416 static int init_input(AVFormatContext *s, const char *filename,
417 AVDictionary **options)
420 AVProbeData pd = { filename, NULL, 0 };
421 int score = AVPROBE_SCORE_RETRY;
424 s->flags |= AVFMT_FLAG_CUSTOM_IO;
426 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
427 s, 0, s->format_probesize);
428 else if (s->iformat->flags & AVFMT_NOFILE)
429 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
430 "will be ignored with AVFMT_NOFILE format.\n");
434 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
435 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
438 if ((ret = s->io_open(s, &s->pb, filename, AVIO_FLAG_READ | s->avio_flags, options)) < 0)
443 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
444 s, 0, s->format_probesize);
447 int ff_packet_list_put(AVPacketList **packet_buffer,
448 AVPacketList **plast_pktl,
449 AVPacket *pkt, int flags)
451 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
455 return AVERROR(ENOMEM);
457 if (flags & FF_PACKETLIST_FLAG_REF_PACKET) {
458 if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
463 // TODO: Adapt callers in this file so the line below can use
464 // av_packet_move_ref() to effectively move the reference
470 (*plast_pktl)->next = pktl;
472 *packet_buffer = pktl;
474 /* Add the packet in the buffered packet list. */
479 int avformat_queue_attached_pictures(AVFormatContext *s)
482 for (i = 0; i < s->nb_streams; i++)
483 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
484 s->streams[i]->discard < AVDISCARD_ALL) {
485 if (s->streams[i]->attached_pic.size <= 0) {
486 av_log(s, AV_LOG_WARNING,
487 "Attached picture on stream %d has invalid size, "
492 ret = ff_packet_list_put(&s->internal->raw_packet_buffer,
493 &s->internal->raw_packet_buffer_end,
494 &s->streams[i]->attached_pic,
495 FF_PACKETLIST_FLAG_REF_PACKET);
502 static int update_stream_avctx(AVFormatContext *s)
505 for (i = 0; i < s->nb_streams; i++) {
506 AVStream *st = s->streams[i];
508 if (!st->internal->need_context_update)
511 /* close parser, because it depends on the codec */
512 if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
513 av_parser_close(st->parser);
517 /* update internal codec context, for the parser */
518 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
522 #if FF_API_LAVF_AVCTX
523 FF_DISABLE_DEPRECATION_WARNINGS
524 /* update deprecated public codec context */
525 ret = avcodec_parameters_to_context(st->codec, st->codecpar);
528 FF_ENABLE_DEPRECATION_WARNINGS
531 st->internal->need_context_update = 0;
537 int avformat_open_input(AVFormatContext **ps, const char *filename,
538 ff_const59 AVInputFormat *fmt, AVDictionary **options)
540 AVFormatContext *s = *ps;
542 AVDictionary *tmp = NULL;
543 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
545 if (!s && !(s = avformat_alloc_context()))
546 return AVERROR(ENOMEM);
548 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
549 return AVERROR(EINVAL);
555 av_dict_copy(&tmp, *options, 0);
557 if (s->pb) // must be before any goto fail
558 s->flags |= AVFMT_FLAG_CUSTOM_IO;
560 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
563 if (!(s->url = av_strdup(filename ? filename : ""))) {
564 ret = AVERROR(ENOMEM);
568 #if FF_API_FORMAT_FILENAME
569 FF_DISABLE_DEPRECATION_WARNINGS
570 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
571 FF_ENABLE_DEPRECATION_WARNINGS
573 if ((ret = init_input(s, filename, &tmp)) < 0)
575 s->probe_score = ret;
577 if (!s->protocol_whitelist && s->pb && s->pb->protocol_whitelist) {
578 s->protocol_whitelist = av_strdup(s->pb->protocol_whitelist);
579 if (!s->protocol_whitelist) {
580 ret = AVERROR(ENOMEM);
585 if (!s->protocol_blacklist && s->pb && s->pb->protocol_blacklist) {
586 s->protocol_blacklist = av_strdup(s->pb->protocol_blacklist);
587 if (!s->protocol_blacklist) {
588 ret = AVERROR(ENOMEM);
593 if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
594 av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist);
595 ret = AVERROR(EINVAL);
599 avio_skip(s->pb, s->skip_initial_bytes);
601 /* Check filename in case an image number is expected. */
602 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
603 if (!av_filename_number_test(filename)) {
604 ret = AVERROR(EINVAL);
609 s->duration = s->start_time = AV_NOPTS_VALUE;
611 /* Allocate private data. */
612 if (s->iformat->priv_data_size > 0) {
613 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
614 ret = AVERROR(ENOMEM);
617 if (s->iformat->priv_class) {
618 *(const AVClass **) s->priv_data = s->iformat->priv_class;
619 av_opt_set_defaults(s->priv_data);
620 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
625 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
627 ff_id3v2_read_dict(s->pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
630 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
631 if ((ret = s->iformat->read_header(s)) < 0)
635 s->metadata = s->internal->id3v2_meta;
636 s->internal->id3v2_meta = NULL;
637 } else if (s->internal->id3v2_meta) {
638 int level = AV_LOG_WARNING;
639 if (s->error_recognition & AV_EF_COMPLIANT)
640 level = AV_LOG_ERROR;
641 av_log(s, level, "Discarding ID3 tags because more suitable tags were found.\n");
642 av_dict_free(&s->internal->id3v2_meta);
643 if (s->error_recognition & AV_EF_EXPLODE)
644 return AVERROR_INVALIDDATA;
647 if (id3v2_extra_meta) {
648 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
649 !strcmp(s->iformat->name, "tta") || !strcmp(s->iformat->name, "wav")) {
650 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
652 if ((ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0)
654 if ((ret = ff_id3v2_parse_priv(s, &id3v2_extra_meta)) < 0)
657 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
659 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
661 if ((ret = avformat_queue_attached_pictures(s)) < 0)
664 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->internal->data_offset)
665 s->internal->data_offset = avio_tell(s->pb);
667 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
669 update_stream_avctx(s);
671 for (i = 0; i < s->nb_streams; i++)
672 s->streams[i]->internal->orig_codec_id = s->streams[i]->codecpar->codec_id;
675 av_dict_free(options);
682 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
684 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
686 avformat_free_context(s);
691 /*******************************************************/
693 static void force_codec_ids(AVFormatContext *s, AVStream *st)
695 switch (st->codecpar->codec_type) {
696 case AVMEDIA_TYPE_VIDEO:
697 if (s->video_codec_id)
698 st->codecpar->codec_id = s->video_codec_id;
700 case AVMEDIA_TYPE_AUDIO:
701 if (s->audio_codec_id)
702 st->codecpar->codec_id = s->audio_codec_id;
704 case AVMEDIA_TYPE_SUBTITLE:
705 if (s->subtitle_codec_id)
706 st->codecpar->codec_id = s->subtitle_codec_id;
708 case AVMEDIA_TYPE_DATA:
709 if (s->data_codec_id)
710 st->codecpar->codec_id = s->data_codec_id;
715 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
717 if (st->request_probe>0) {
718 AVProbeData *pd = &st->probe_data;
720 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
724 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
726 av_log(s, AV_LOG_WARNING,
727 "Failed to reallocate probe buffer for stream %d\n",
732 memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
733 pd->buf_size += pkt->size;
734 memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
737 st->probe_packets = 0;
739 av_log(s, AV_LOG_WARNING,
740 "nothing to probe for stream %d\n", st->index);
744 end= s->internal->raw_packet_buffer_remaining_size <= 0
745 || st->probe_packets<= 0;
747 if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
748 int score = set_codec_from_probe_data(s, st, pd);
749 if ( (st->codecpar->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY)
753 st->request_probe = -1;
754 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
755 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
757 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
759 force_codec_ids(s, st);
765 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
767 int64_t ref = pkt->dts;
768 int i, pts_wrap_behavior;
769 int64_t pts_wrap_reference;
770 AVProgram *first_program;
772 if (ref == AV_NOPTS_VALUE)
774 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
776 ref &= (1LL << st->pts_wrap_bits)-1;
778 // reference time stamp should be 60 s before first time stamp
779 pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
780 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
781 pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
782 (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
783 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
785 first_program = av_find_program_from_stream(s, NULL, stream_index);
787 if (!first_program) {
788 int default_stream_index = av_find_default_stream_index(s);
789 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
790 for (i = 0; i < s->nb_streams; i++) {
791 if (av_find_program_from_stream(s, NULL, i))
793 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
794 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
798 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
799 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
803 AVProgram *program = first_program;
805 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
806 pts_wrap_reference = program->pts_wrap_reference;
807 pts_wrap_behavior = program->pts_wrap_behavior;
810 program = av_find_program_from_stream(s, program, stream_index);
813 // update every program with differing pts_wrap_reference
814 program = first_program;
816 if (program->pts_wrap_reference != pts_wrap_reference) {
817 for (i = 0; i<program->nb_stream_indexes; i++) {
818 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
819 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
822 program->pts_wrap_reference = pts_wrap_reference;
823 program->pts_wrap_behavior = pts_wrap_behavior;
825 program = av_find_program_from_stream(s, program, stream_index);
831 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
837 AVPacketList *pktl = s->internal->raw_packet_buffer;
841 st = s->streams[pkt->stream_index];
842 if (s->internal->raw_packet_buffer_remaining_size <= 0)
843 if ((err = probe_codec(s, st, NULL)) < 0)
845 if (st->request_probe <= 0) {
846 s->internal->raw_packet_buffer = pktl->next;
847 s->internal->raw_packet_buffer_remaining_size += pkt->size;
856 ret = s->iformat->read_packet(s, pkt);
858 /* Some demuxers return FFERROR_REDO when they consume
859 data and discard it (ignored streams, junk, extradata).
860 We must re-call the demuxer to get the real packet. */
861 if (ret == FFERROR_REDO)
863 if (!pktl || ret == AVERROR(EAGAIN))
865 for (i = 0; i < s->nb_streams; i++) {
867 if (st->probe_packets || st->request_probe > 0)
868 if ((err = probe_codec(s, st, NULL)) < 0)
870 av_assert0(st->request_probe <= 0);
875 err = av_packet_make_refcounted(pkt);
879 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
880 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
881 av_log(s, AV_LOG_WARNING,
882 "Dropped corrupted packet (stream = %d)\n",
884 av_packet_unref(pkt);
888 if (pkt->stream_index >= (unsigned)s->nb_streams) {
889 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
893 st = s->streams[pkt->stream_index];
895 if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
896 // correct first time stamps to negative values
897 if (!is_relative(st->first_dts))
898 st->first_dts = wrap_timestamp(st, st->first_dts);
899 if (!is_relative(st->start_time))
900 st->start_time = wrap_timestamp(st, st->start_time);
901 if (!is_relative(st->cur_dts))
902 st->cur_dts = wrap_timestamp(st, st->cur_dts);
905 pkt->dts = wrap_timestamp(st, pkt->dts);
906 pkt->pts = wrap_timestamp(st, pkt->pts);
908 force_codec_ids(s, st);
910 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
911 if (s->use_wallclock_as_timestamps)
912 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
914 if (!pktl && st->request_probe <= 0)
917 err = ff_packet_list_put(&s->internal->raw_packet_buffer,
918 &s->internal->raw_packet_buffer_end,
922 s->internal->raw_packet_buffer_remaining_size -= pkt->size;
924 if ((err = probe_codec(s, st, pkt)) < 0)
930 /**********************************************************/
932 static int determinable_frame_size(AVCodecContext *avctx)
934 switch(avctx->codec_id) {
935 case AV_CODEC_ID_MP1:
936 case AV_CODEC_ID_MP2:
937 case AV_CODEC_ID_MP3:
938 case AV_CODEC_ID_CODEC2:
946 * Return the frame duration in seconds. Return 0 if not available.
948 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
949 AVCodecParserContext *pc, AVPacket *pkt)
951 AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
952 av_mul_q(av_inv_q(st->internal->avctx->time_base), (AVRational){1, st->internal->avctx->ticks_per_frame});
953 int frame_size, sample_rate;
955 #if FF_API_LAVF_AVCTX
956 FF_DISABLE_DEPRECATION_WARNINGS
957 if ((!codec_framerate.den || !codec_framerate.num) && st->codec->time_base.den && st->codec->time_base.num)
958 codec_framerate = av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
959 FF_ENABLE_DEPRECATION_WARNINGS
964 switch (st->codecpar->codec_type) {
965 case AVMEDIA_TYPE_VIDEO:
966 if (st->r_frame_rate.num && !pc && s->iformat) {
967 *pnum = st->r_frame_rate.den;
968 *pden = st->r_frame_rate.num;
969 } else if (st->time_base.num * 1000LL > st->time_base.den) {
970 *pnum = st->time_base.num;
971 *pden = st->time_base.den;
972 } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
973 av_assert0(st->internal->avctx->ticks_per_frame);
974 av_reduce(pnum, pden,
976 codec_framerate.num * (int64_t)st->internal->avctx->ticks_per_frame,
979 if (pc && pc->repeat_pict) {
980 av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
981 av_reduce(pnum, pden,
982 (*pnum) * (1LL + pc->repeat_pict),
986 /* If this codec can be interlaced or progressive then we need
987 * a parser to compute duration of a packet. Thus if we have
988 * no parser in such case leave duration undefined. */
989 if (st->internal->avctx->ticks_per_frame > 1 && !pc)
993 case AVMEDIA_TYPE_AUDIO:
994 if (st->internal->avctx_inited) {
995 frame_size = av_get_audio_frame_duration(st->internal->avctx, pkt->size);
996 sample_rate = st->internal->avctx->sample_rate;
998 frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
999 sample_rate = st->codecpar->sample_rate;
1001 if (frame_size <= 0 || sample_rate <= 0)
1004 *pden = sample_rate;
1011 static int is_intra_only(enum AVCodecID id)
1013 const AVCodecDescriptor *d = avcodec_descriptor_get(id);
1016 if (d->type == AVMEDIA_TYPE_VIDEO && !(d->props & AV_CODEC_PROP_INTRA_ONLY))
1021 static int has_decode_delay_been_guessed(AVStream *st)
1023 if (st->codecpar->codec_id != AV_CODEC_ID_H264) return 1;
1024 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
1026 #if CONFIG_H264_DECODER
1027 if (st->internal->avctx->has_b_frames &&
1028 avpriv_h264_has_num_reorder_frames(st->internal->avctx) == st->internal->avctx->has_b_frames)
1031 if (st->internal->avctx->has_b_frames<3)
1032 return st->nb_decoded_frames >= 7;
1033 else if (st->internal->avctx->has_b_frames<4)
1034 return st->nb_decoded_frames >= 18;
1036 return st->nb_decoded_frames >= 20;
1039 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
1043 if (pktl == s->internal->packet_buffer_end)
1044 return s->internal->parse_queue;
1048 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
1049 int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1050 st->codecpar->codec_id != AV_CODEC_ID_HEVC;
1053 int delay = st->internal->avctx->has_b_frames;
1056 if (dts == AV_NOPTS_VALUE) {
1057 int64_t best_score = INT64_MAX;
1058 for (i = 0; i<delay; i++) {
1059 if (st->pts_reorder_error_count[i]) {
1060 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
1061 if (score < best_score) {
1063 dts = pts_buffer[i];
1068 for (i = 0; i<delay; i++) {
1069 if (pts_buffer[i] != AV_NOPTS_VALUE) {
1070 int64_t diff = FFABS(pts_buffer[i] - dts)
1071 + (uint64_t)st->pts_reorder_error[i];
1072 diff = FFMAX(diff, st->pts_reorder_error[i]);
1073 st->pts_reorder_error[i] = diff;
1074 st->pts_reorder_error_count[i]++;
1075 if (st->pts_reorder_error_count[i] > 250) {
1076 st->pts_reorder_error[i] >>= 1;
1077 st->pts_reorder_error_count[i] >>= 1;
1084 if (dts == AV_NOPTS_VALUE)
1085 dts = pts_buffer[0];
1091 * Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts
1092 * of the packets in a window.
1094 static void update_dts_from_pts(AVFormatContext *s, int stream_index,
1095 AVPacketList *pkt_buffer)
1097 AVStream *st = s->streams[stream_index];
1098 int delay = st->internal->avctx->has_b_frames;
1101 int64_t pts_buffer[MAX_REORDER_DELAY+1];
1103 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
1104 pts_buffer[i] = AV_NOPTS_VALUE;
1106 for (; pkt_buffer; pkt_buffer = get_next_pkt(s, st, pkt_buffer)) {
1107 if (pkt_buffer->pkt.stream_index != stream_index)
1110 if (pkt_buffer->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1111 pts_buffer[0] = pkt_buffer->pkt.pts;
1112 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
1113 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
1115 pkt_buffer->pkt.dts = select_from_pts_buffer(st, pts_buffer, pkt_buffer->pkt.dts);
1120 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
1121 int64_t dts, int64_t pts, AVPacket *pkt)
1123 AVStream *st = s->streams[stream_index];
1124 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1125 AVPacketList *pktl_it;
1129 if (st->first_dts != AV_NOPTS_VALUE ||
1130 dts == AV_NOPTS_VALUE ||
1131 st->cur_dts == AV_NOPTS_VALUE ||
1132 st->cur_dts < INT_MIN + RELATIVE_TS_BASE ||
1136 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
1138 shift = (uint64_t)st->first_dts - RELATIVE_TS_BASE;
1140 if (is_relative(pts))
1143 for (pktl_it = pktl; pktl_it; pktl_it = get_next_pkt(s, st, pktl_it)) {
1144 if (pktl_it->pkt.stream_index != stream_index)
1146 if (is_relative(pktl_it->pkt.pts))
1147 pktl_it->pkt.pts += shift;
1149 if (is_relative(pktl_it->pkt.dts))
1150 pktl_it->pkt.dts += shift;
1152 if (st->start_time == AV_NOPTS_VALUE && pktl_it->pkt.pts != AV_NOPTS_VALUE) {
1153 st->start_time = pktl_it->pkt.pts;
1154 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate)
1155 st->start_time += av_rescale_q(st->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
1159 if (has_decode_delay_been_guessed(st)) {
1160 update_dts_from_pts(s, stream_index, pktl);
1163 if (st->start_time == AV_NOPTS_VALUE) {
1164 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || !(pkt->flags & AV_PKT_FLAG_DISCARD)) {
1165 st->start_time = pts;
1167 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate)
1168 st->start_time += av_rescale_q(st->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
1172 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1173 int stream_index, int duration)
1175 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1176 int64_t cur_dts = RELATIVE_TS_BASE;
1178 if (st->first_dts != AV_NOPTS_VALUE) {
1179 if (st->update_initial_durations_done)
1181 st->update_initial_durations_done = 1;
1182 cur_dts = st->first_dts;
1183 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1184 if (pktl->pkt.stream_index == stream_index) {
1185 if (pktl->pkt.pts != pktl->pkt.dts ||
1186 pktl->pkt.dts != AV_NOPTS_VALUE ||
1189 cur_dts -= duration;
1192 if (pktl && pktl->pkt.dts != st->first_dts) {
1193 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %"PRId64") in the queue\n",
1194 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1198 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1201 pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1202 st->first_dts = cur_dts;
1203 } else if (st->cur_dts != RELATIVE_TS_BASE)
1206 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1207 if (pktl->pkt.stream_index != stream_index)
1209 if ((pktl->pkt.pts == pktl->pkt.dts ||
1210 pktl->pkt.pts == AV_NOPTS_VALUE) &&
1211 (pktl->pkt.dts == AV_NOPTS_VALUE ||
1212 pktl->pkt.dts == st->first_dts ||
1213 pktl->pkt.dts == RELATIVE_TS_BASE) &&
1214 !pktl->pkt.duration) {
1215 pktl->pkt.dts = cur_dts;
1216 if (!st->internal->avctx->has_b_frames)
1217 pktl->pkt.pts = cur_dts;
1218 // if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1219 pktl->pkt.duration = duration;
1222 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1225 st->cur_dts = cur_dts;
1228 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1229 AVCodecParserContext *pc, AVPacket *pkt,
1230 int64_t next_dts, int64_t next_pts)
1232 int num, den, presentation_delayed, delay, i;
1234 AVRational duration;
1235 int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1236 st->codecpar->codec_id != AV_CODEC_ID_HEVC;
1238 if (s->flags & AVFMT_FLAG_NOFILLIN)
1241 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1242 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
1243 if (st->last_dts_for_order_check <= pkt->dts) {
1246 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
1247 "DTS %"PRIi64" < %"PRIi64" out of order\n",
1249 st->last_dts_for_order_check);
1250 st->dts_misordered++;
1252 if (st->dts_ordered + st->dts_misordered > 250) {
1253 st->dts_ordered >>= 1;
1254 st->dts_misordered >>= 1;
1258 st->last_dts_for_order_check = pkt->dts;
1259 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1260 pkt->dts = AV_NOPTS_VALUE;
1263 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1264 pkt->dts = AV_NOPTS_VALUE;
1266 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1267 && !st->internal->avctx->has_b_frames)
1268 //FIXME Set low_delay = 0 when has_b_frames = 1
1269 st->internal->avctx->has_b_frames = 1;
1271 /* do we have a video B-frame ? */
1272 delay = st->internal->avctx->has_b_frames;
1273 presentation_delayed = 0;
1275 /* XXX: need has_b_frame, but cannot get it if the codec is
1276 * not initialized */
1278 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1279 presentation_delayed = 1;
1281 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1282 st->pts_wrap_bits < 63 &&
1283 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1284 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1285 pkt->dts -= 1LL << st->pts_wrap_bits;
1287 pkt->pts += 1LL << st->pts_wrap_bits;
1290 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1291 * We take the conservative approach and discard both.
1292 * Note: If this is misbehaving for an H.264 file, then possibly
1293 * presentation_delayed is not set correctly. */
1294 if (delay == 1 && pkt->dts == pkt->pts &&
1295 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1296 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1297 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1298 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1299 pkt->dts = AV_NOPTS_VALUE;
1302 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1303 if (pkt->duration == 0) {
1304 ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1306 duration = (AVRational) {num, den};
1307 pkt->duration = av_rescale_rnd(1,
1308 num * (int64_t) st->time_base.den,
1309 den * (int64_t) st->time_base.num,
1314 if (pkt->duration != 0 && (s->internal->packet_buffer || s->internal->parse_queue))
1315 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1317 /* Correct timestamps with byte offset if demuxers only have timestamps
1318 * on packet boundaries */
1319 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1320 /* this will estimate bitrate based on this frame's duration and size */
1321 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1322 if (pkt->pts != AV_NOPTS_VALUE)
1324 if (pkt->dts != AV_NOPTS_VALUE)
1328 /* This may be redundant, but it should not hurt. */
1329 if (pkt->dts != AV_NOPTS_VALUE &&
1330 pkt->pts != AV_NOPTS_VALUE &&
1331 pkt->pts > pkt->dts)
1332 presentation_delayed = 1;
1334 if (s->debug & FF_FDEBUG_TS)
1335 av_log(s, AV_LOG_DEBUG,
1336 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%"PRId64" delay:%d onein_oneout:%d\n",
1337 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1338 pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1340 /* Interpolate PTS and DTS if they are not present. We skip H264
1341 * currently because delay and has_b_frames are not reliably set. */
1342 if ((delay == 0 || (delay == 1 && pc)) &&
1344 if (presentation_delayed) {
1345 /* DTS = decompression timestamp */
1346 /* PTS = presentation timestamp */
1347 if (pkt->dts == AV_NOPTS_VALUE)
1348 pkt->dts = st->last_IP_pts;
1349 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1350 if (pkt->dts == AV_NOPTS_VALUE)
1351 pkt->dts = st->cur_dts;
1353 /* This is tricky: the dts must be incremented by the duration
1354 * of the frame we are displaying, i.e. the last I- or P-frame. */
1355 if (st->last_IP_duration == 0 && (uint64_t)pkt->duration <= INT32_MAX)
1356 st->last_IP_duration = pkt->duration;
1357 if (pkt->dts != AV_NOPTS_VALUE)
1358 st->cur_dts = pkt->dts + st->last_IP_duration;
1359 if (pkt->dts != AV_NOPTS_VALUE &&
1360 pkt->pts == AV_NOPTS_VALUE &&
1361 st->last_IP_duration > 0 &&
1362 ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1363 next_dts != next_pts &&
1364 next_pts != AV_NOPTS_VALUE)
1365 pkt->pts = next_dts;
1367 if ((uint64_t)pkt->duration <= INT32_MAX)
1368 st->last_IP_duration = pkt->duration;
1369 st->last_IP_pts = pkt->pts;
1370 /* Cannot compute PTS if not present (we can compute it only
1371 * by knowing the future. */
1372 } else if (pkt->pts != AV_NOPTS_VALUE ||
1373 pkt->dts != AV_NOPTS_VALUE ||
1376 /* presentation is not delayed : PTS and DTS are the same */
1377 if (pkt->pts == AV_NOPTS_VALUE)
1378 pkt->pts = pkt->dts;
1379 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1381 if (pkt->pts == AV_NOPTS_VALUE)
1382 pkt->pts = st->cur_dts;
1383 pkt->dts = pkt->pts;
1384 if (pkt->pts != AV_NOPTS_VALUE)
1385 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1389 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1390 st->pts_buffer[0] = pkt->pts;
1391 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1392 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1394 if(has_decode_delay_been_guessed(st))
1395 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1397 // We skipped it above so we try here.
1399 // This should happen on the first packet
1400 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1401 if (pkt->dts > st->cur_dts)
1402 st->cur_dts = pkt->dts;
1404 if (s->debug & FF_FDEBUG_TS)
1405 av_log(s, AV_LOG_DEBUG, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s st:%d (%d)\n",
1406 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), st->index, st->id);
1409 if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA || is_intra_only(st->codecpar->codec_id))
1410 pkt->flags |= AV_PKT_FLAG_KEY;
1411 #if FF_API_CONVERGENCE_DURATION
1412 FF_DISABLE_DEPRECATION_WARNINGS
1414 pkt->convergence_duration = pc->convergence_duration;
1415 FF_ENABLE_DEPRECATION_WARNINGS
1419 void ff_packet_list_free(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1421 AVPacketList *tmp = *pkt_buf;
1424 AVPacketList *pktl = tmp;
1426 av_packet_unref(&pktl->pkt);
1430 *pkt_buf_end = NULL;
1434 * Parse a packet, add all split parts to parse_queue.
1436 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1438 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1440 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1441 AVStream *st = s->streams[stream_index];
1442 uint8_t *data = pkt ? pkt->data : NULL;
1443 int size = pkt ? pkt->size : 0;
1444 int ret = 0, got_output = 0;
1447 av_init_packet(&flush_pkt);
1450 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1451 // preserve 0-size sync packets
1452 compute_pkt_fields(s, st, st->parser, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1455 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1457 int64_t next_pts = pkt->pts;
1458 int64_t next_dts = pkt->dts;
1460 av_init_packet(&out_pkt);
1461 len = av_parser_parse2(st->parser, st->internal->avctx,
1462 &out_pkt.data, &out_pkt.size, data, size,
1463 pkt->pts, pkt->dts, pkt->pos);
1465 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1467 /* increment read pointer */
1471 got_output = !!out_pkt.size;
1476 if (pkt->buf && out_pkt.data == pkt->data) {
1477 /* reference pkt->buf only when out_pkt.data is guaranteed to point
1478 * to data in it and not in the parser's internal buffer. */
1479 /* XXX: Ensure this is the case with all parsers when st->parser->flags
1480 * is PARSER_FLAG_COMPLETE_FRAMES and check for that instead? */
1481 out_pkt.buf = av_buffer_ref(pkt->buf);
1483 ret = AVERROR(ENOMEM);
1487 ret = av_packet_make_refcounted(&out_pkt);
1492 if (pkt->side_data) {
1493 out_pkt.side_data = pkt->side_data;
1494 out_pkt.side_data_elems = pkt->side_data_elems;
1495 pkt->side_data = NULL;
1496 pkt->side_data_elems = 0;
1499 /* set the duration */
1500 out_pkt.duration = (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->duration : 0;
1501 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1502 if (st->internal->avctx->sample_rate > 0) {
1504 av_rescale_q_rnd(st->parser->duration,
1505 (AVRational) { 1, st->internal->avctx->sample_rate },
1511 out_pkt.stream_index = st->index;
1512 out_pkt.pts = st->parser->pts;
1513 out_pkt.dts = st->parser->dts;
1514 out_pkt.pos = st->parser->pos;
1515 out_pkt.flags |= pkt->flags & AV_PKT_FLAG_DISCARD;
1517 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1518 out_pkt.pos = st->parser->frame_offset;
1520 if (st->parser->key_frame == 1 ||
1521 (st->parser->key_frame == -1 &&
1522 st->parser->pict_type == AV_PICTURE_TYPE_I))
1523 out_pkt.flags |= AV_PKT_FLAG_KEY;
1525 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1526 out_pkt.flags |= AV_PKT_FLAG_KEY;
1528 compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1530 ret = ff_packet_list_put(&s->internal->parse_queue,
1531 &s->internal->parse_queue_end,
1534 av_packet_unref(&out_pkt);
1539 /* end of the stream => close and free the parser */
1540 if (pkt == &flush_pkt) {
1541 av_parser_close(st->parser);
1546 av_packet_unref(pkt);
1550 int ff_packet_list_get(AVPacketList **pkt_buffer,
1551 AVPacketList **pkt_buffer_end,
1555 av_assert0(*pkt_buffer);
1558 *pkt_buffer = pktl->next;
1560 *pkt_buffer_end = NULL;
1565 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1567 return av_rescale(ts, st->time_base.num * st->codecpar->sample_rate, st->time_base.den);
1570 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1572 int ret = 0, i, got_packet = 0;
1573 AVDictionary *metadata = NULL;
1575 av_init_packet(pkt);
1577 while (!got_packet && !s->internal->parse_queue) {
1581 /* read next packet */
1582 ret = ff_read_packet(s, &cur_pkt);
1584 if (ret == AVERROR(EAGAIN))
1586 /* flush the parsers */
1587 for (i = 0; i < s->nb_streams; i++) {
1589 if (st->parser && st->need_parsing)
1590 parse_packet(s, NULL, st->index);
1592 /* all remaining packets are now in parse_queue =>
1593 * really terminate parsing */
1597 st = s->streams[cur_pkt.stream_index];
1599 /* update context if required */
1600 if (st->internal->need_context_update) {
1601 if (avcodec_is_open(st->internal->avctx)) {
1602 av_log(s, AV_LOG_DEBUG, "Demuxer context update while decoder is open, closing and trying to re-open\n");
1603 avcodec_close(st->internal->avctx);
1604 st->info->found_decoder = 0;
1607 /* close parser, because it depends on the codec */
1608 if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
1609 av_parser_close(st->parser);
1613 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
1617 #if FF_API_LAVF_AVCTX
1618 FF_DISABLE_DEPRECATION_WARNINGS
1619 /* update deprecated public codec context */
1620 ret = avcodec_parameters_to_context(st->codec, st->codecpar);
1623 FF_ENABLE_DEPRECATION_WARNINGS
1626 st->internal->need_context_update = 0;
1629 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1630 cur_pkt.dts != AV_NOPTS_VALUE &&
1631 cur_pkt.pts < cur_pkt.dts) {
1632 av_log(s, AV_LOG_WARNING,
1633 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1634 cur_pkt.stream_index,
1635 av_ts2str(cur_pkt.pts),
1636 av_ts2str(cur_pkt.dts),
1639 if (s->debug & FF_FDEBUG_TS)
1640 av_log(s, AV_LOG_DEBUG,
1641 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%"PRId64", flags=%d\n",
1642 cur_pkt.stream_index,
1643 av_ts2str(cur_pkt.pts),
1644 av_ts2str(cur_pkt.dts),
1645 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1647 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1648 st->parser = av_parser_init(st->codecpar->codec_id);
1650 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1651 "%s, packets or times may be invalid.\n",
1652 avcodec_get_name(st->codecpar->codec_id));
1653 /* no parser available: just output the raw packets */
1654 st->need_parsing = AVSTREAM_PARSE_NONE;
1655 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1656 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1657 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1658 st->parser->flags |= PARSER_FLAG_ONCE;
1659 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1660 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1663 if (!st->need_parsing || !st->parser) {
1664 /* no parsing needed: we just output the packet as is */
1666 compute_pkt_fields(s, st, NULL, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1667 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1668 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1669 ff_reduce_index(s, st->index);
1670 av_add_index_entry(st, pkt->pos, pkt->dts,
1671 0, 0, AVINDEX_KEYFRAME);
1674 } else if (st->discard < AVDISCARD_ALL) {
1675 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1677 st->codecpar->sample_rate = st->internal->avctx->sample_rate;
1678 st->codecpar->bit_rate = st->internal->avctx->bit_rate;
1679 st->codecpar->channels = st->internal->avctx->channels;
1680 st->codecpar->channel_layout = st->internal->avctx->channel_layout;
1681 st->codecpar->codec_id = st->internal->avctx->codec_id;
1684 av_packet_unref(&cur_pkt);
1686 if (pkt->flags & AV_PKT_FLAG_KEY)
1687 st->skip_to_keyframe = 0;
1688 if (st->skip_to_keyframe) {
1689 av_packet_unref(&cur_pkt);
1697 if (!got_packet && s->internal->parse_queue)
1698 ret = ff_packet_list_get(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
1701 AVStream *st = s->streams[pkt->stream_index];
1702 int discard_padding = 0;
1703 if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1704 int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1705 int64_t sample = ts_to_samples(st, pts);
1706 int duration = ts_to_samples(st, pkt->duration);
1707 int64_t end_sample = sample + duration;
1708 if (duration > 0 && end_sample >= st->first_discard_sample &&
1709 sample < st->last_discard_sample)
1710 discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1712 if (st->start_skip_samples && (pkt->pts == 0 || pkt->pts == RELATIVE_TS_BASE))
1713 st->skip_samples = st->start_skip_samples;
1714 if (st->skip_samples || discard_padding) {
1715 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1717 AV_WL32(p, st->skip_samples);
1718 AV_WL32(p + 4, discard_padding);
1719 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d / discard %d\n", st->skip_samples, discard_padding);
1721 st->skip_samples = 0;
1724 if (st->inject_global_side_data) {
1725 for (i = 0; i < st->nb_side_data; i++) {
1726 AVPacketSideData *src_sd = &st->side_data[i];
1729 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1732 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1734 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1738 memcpy(dst_data, src_sd->data, src_sd->size);
1740 st->inject_global_side_data = 0;
1744 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1746 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1747 av_dict_copy(&s->metadata, metadata, 0);
1748 av_dict_free(&metadata);
1749 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1752 #if FF_API_LAVF_AVCTX
1753 update_stream_avctx(s);
1756 if (s->debug & FF_FDEBUG_TS)
1757 av_log(s, AV_LOG_DEBUG,
1758 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1759 "size=%d, duration=%"PRId64", flags=%d\n",
1761 av_ts2str(pkt->pts),
1762 av_ts2str(pkt->dts),
1763 pkt->size, pkt->duration, pkt->flags);
1768 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1770 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1776 ret = s->internal->packet_buffer
1777 ? ff_packet_list_get(&s->internal->packet_buffer,
1778 &s->internal->packet_buffer_end, pkt)
1779 : read_frame_internal(s, pkt);
1786 AVPacketList *pktl = s->internal->packet_buffer;
1789 AVPacket *next_pkt = &pktl->pkt;
1791 if (next_pkt->dts != AV_NOPTS_VALUE) {
1792 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1793 // last dts seen for this stream. if any of packets following
1794 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1795 int64_t last_dts = next_pkt->dts;
1796 av_assert2(wrap_bits <= 64);
1797 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1798 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1799 av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2ULL << (wrap_bits - 1)) < 0) {
1800 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2ULL << (wrap_bits - 1))) {
1802 next_pkt->pts = pktl->pkt.dts;
1804 if (last_dts != AV_NOPTS_VALUE) {
1805 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1806 last_dts = pktl->pkt.dts;
1811 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1812 // Fixing the last reference frame had none pts issue (For MXF etc).
1813 // We only do this when
1815 // 2. we are not able to resolve a pts value for current packet.
1816 // 3. the packets for this stream at the end of the files had valid dts.
1817 next_pkt->pts = last_dts + next_pkt->duration;
1819 pktl = s->internal->packet_buffer;
1822 /* read packet from packet buffer, if there is data */
1823 st = s->streams[next_pkt->stream_index];
1824 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1825 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1826 ret = ff_packet_list_get(&s->internal->packet_buffer,
1827 &s->internal->packet_buffer_end, pkt);
1832 ret = read_frame_internal(s, pkt);
1834 if (pktl && ret != AVERROR(EAGAIN)) {
1841 ret = ff_packet_list_put(&s->internal->packet_buffer,
1842 &s->internal->packet_buffer_end,
1843 pkt, FF_PACKETLIST_FLAG_REF_PACKET);
1844 av_packet_unref(pkt);
1851 st = s->streams[pkt->stream_index];
1852 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1853 ff_reduce_index(s, st->index);
1854 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1857 if (is_relative(pkt->dts))
1858 pkt->dts -= RELATIVE_TS_BASE;
1859 if (is_relative(pkt->pts))
1860 pkt->pts -= RELATIVE_TS_BASE;
1865 /* XXX: suppress the packet queue */
1866 static void flush_packet_queue(AVFormatContext *s)
1870 ff_packet_list_free(&s->internal->parse_queue, &s->internal->parse_queue_end);
1871 ff_packet_list_free(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
1872 ff_packet_list_free(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
1874 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1877 /*******************************************************/
1880 int av_find_default_stream_index(AVFormatContext *s)
1884 int best_stream = 0;
1885 int best_score = INT_MIN;
1887 if (s->nb_streams <= 0)
1889 for (i = 0; i < s->nb_streams; i++) {
1892 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1893 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
1895 if (st->codecpar->width && st->codecpar->height)
1899 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1900 if (st->codecpar->sample_rate)
1903 if (st->codec_info_nb_frames)
1906 if (st->discard != AVDISCARD_ALL)
1909 if (score > best_score) {
1917 /** Flush the frame reader. */
1918 void ff_read_frame_flush(AVFormatContext *s)
1923 flush_packet_queue(s);
1925 /* Reset read state for each stream. */
1926 for (i = 0; i < s->nb_streams; i++) {
1930 av_parser_close(st->parser);
1933 st->last_IP_pts = AV_NOPTS_VALUE;
1934 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1935 if (st->first_dts == AV_NOPTS_VALUE)
1936 st->cur_dts = RELATIVE_TS_BASE;
1938 /* We set the current DTS to an unspecified origin. */
1939 st->cur_dts = AV_NOPTS_VALUE;
1941 st->probe_packets = MAX_PROBE_PACKETS;
1943 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1944 st->pts_buffer[j] = AV_NOPTS_VALUE;
1946 if (s->internal->inject_global_side_data)
1947 st->inject_global_side_data = 1;
1949 st->skip_samples = 0;
1953 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1957 for (i = 0; i < s->nb_streams; i++) {
1958 AVStream *st = s->streams[i];
1961 av_rescale(timestamp,
1962 st->time_base.den * (int64_t) ref_st->time_base.num,
1963 st->time_base.num * (int64_t) ref_st->time_base.den);
1967 void ff_reduce_index(AVFormatContext *s, int stream_index)
1969 AVStream *st = s->streams[stream_index];
1970 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1972 if ((unsigned) st->nb_index_entries >= max_entries) {
1974 for (i = 0; 2 * i < st->nb_index_entries; i++)
1975 st->index_entries[i] = st->index_entries[2 * i];
1976 st->nb_index_entries = i;
1980 int ff_add_index_entry(AVIndexEntry **index_entries,
1981 int *nb_index_entries,
1982 unsigned int *index_entries_allocated_size,
1983 int64_t pos, int64_t timestamp,
1984 int size, int distance, int flags)
1986 AVIndexEntry *entries, *ie;
1989 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1992 if (timestamp == AV_NOPTS_VALUE)
1993 return AVERROR(EINVAL);
1995 if (size < 0 || size > 0x3FFFFFFF)
1996 return AVERROR(EINVAL);
1998 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1999 timestamp -= RELATIVE_TS_BASE;
2001 entries = av_fast_realloc(*index_entries,
2002 index_entries_allocated_size,
2003 (*nb_index_entries + 1) *
2004 sizeof(AVIndexEntry));
2008 *index_entries = entries;
2010 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
2011 timestamp, AVSEEK_FLAG_ANY);
2014 index = (*nb_index_entries)++;
2015 ie = &entries[index];
2016 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
2018 ie = &entries[index];
2019 if (ie->timestamp != timestamp) {
2020 if (ie->timestamp <= timestamp)
2022 memmove(entries + index + 1, entries + index,
2023 sizeof(AVIndexEntry) * (*nb_index_entries - index));
2024 (*nb_index_entries)++;
2025 } else if (ie->pos == pos && distance < ie->min_distance)
2026 // do not reduce the distance
2027 distance = ie->min_distance;
2031 ie->timestamp = timestamp;
2032 ie->min_distance = distance;
2039 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2040 int size, int distance, int flags)
2042 timestamp = wrap_timestamp(st, timestamp);
2043 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
2044 &st->index_entries_allocated_size, pos,
2045 timestamp, size, distance, flags);
2048 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
2049 int64_t wanted_timestamp, int flags)
2057 // Optimize appending index entries at the end.
2058 if (b && entries[b - 1].timestamp < wanted_timestamp)
2064 // Search for the next non-discarded packet.
2065 while ((entries[m].flags & AVINDEX_DISCARD_FRAME) && m < b && m < nb_entries - 1) {
2067 if (m == b && entries[m].timestamp >= wanted_timestamp) {
2073 timestamp = entries[m].timestamp;
2074 if (timestamp >= wanted_timestamp)
2076 if (timestamp <= wanted_timestamp)
2079 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
2081 if (!(flags & AVSEEK_FLAG_ANY))
2082 while (m >= 0 && m < nb_entries &&
2083 !(entries[m].flags & AVINDEX_KEYFRAME))
2084 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
2086 if (m == nb_entries)
2091 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
2094 int64_t pos_delta = 0;
2096 //We could use URLProtocol flags here but as many user applications do not use URLProtocols this would be unreliable
2097 const char *proto = avio_find_protocol_name(s->url);
2100 av_log(s, AV_LOG_INFO,
2101 "Protocol name not provided, cannot determine if input is local or "
2102 "a network protocol, buffers and access patterns cannot be configured "
2103 "optimally without knowing the protocol\n");
2106 if (proto && !(strcmp(proto, "file") && strcmp(proto, "pipe") && strcmp(proto, "cache")))
2109 for (ist1 = 0; ist1 < s->nb_streams; ist1++) {
2110 AVStream *st1 = s->streams[ist1];
2111 for (ist2 = 0; ist2 < s->nb_streams; ist2++) {
2112 AVStream *st2 = s->streams[ist2];
2118 for (i1 = i2 = 0; i1 < st1->nb_index_entries; i1++) {
2119 AVIndexEntry *e1 = &st1->index_entries[i1];
2120 int64_t e1_pts = av_rescale_q(e1->timestamp, st1->time_base, AV_TIME_BASE_Q);
2122 skip = FFMAX(skip, e1->size);
2123 for (; i2 < st2->nb_index_entries; i2++) {
2124 AVIndexEntry *e2 = &st2->index_entries[i2];
2125 int64_t e2_pts = av_rescale_q(e2->timestamp, st2->time_base, AV_TIME_BASE_Q);
2126 if (e2_pts - e1_pts < time_tolerance)
2128 pos_delta = FFMAX(pos_delta, e1->pos - e2->pos);
2136 /* XXX This could be adjusted depending on protocol*/
2137 if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
2138 av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
2139 ffio_set_buf_size(s->pb, pos_delta);
2140 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
2143 if (skip < (1<<23)) {
2144 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, skip);
2148 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
2150 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
2151 wanted_timestamp, flags);
2154 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
2155 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2157 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
2158 if (stream_index >= 0)
2159 ts = wrap_timestamp(s->streams[stream_index], ts);
2163 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
2164 int64_t target_ts, int flags)
2166 const AVInputFormat *avif = s->iformat;
2167 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
2168 int64_t ts_min, ts_max, ts;
2173 if (stream_index < 0)
2176 av_log(s, AV_LOG_TRACE, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2179 ts_min = AV_NOPTS_VALUE;
2180 pos_limit = -1; // GCC falsely says it may be uninitialized.
2182 st = s->streams[stream_index];
2183 if (st->index_entries) {
2186 /* FIXME: Whole function must be checked for non-keyframe entries in
2187 * index case, especially read_timestamp(). */
2188 index = av_index_search_timestamp(st, target_ts,
2189 flags | AVSEEK_FLAG_BACKWARD);
2190 index = FFMAX(index, 0);
2191 e = &st->index_entries[index];
2193 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
2195 ts_min = e->timestamp;
2196 av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
2197 pos_min, av_ts2str(ts_min));
2199 av_assert1(index == 0);
2202 index = av_index_search_timestamp(st, target_ts,
2203 flags & ~AVSEEK_FLAG_BACKWARD);
2204 av_assert0(index < st->nb_index_entries);
2206 e = &st->index_entries[index];
2207 av_assert1(e->timestamp >= target_ts);
2209 ts_max = e->timestamp;
2210 pos_limit = pos_max - e->min_distance;
2211 av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
2212 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
2216 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
2217 ts_min, ts_max, flags, &ts, avif->read_timestamp);
2222 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2225 ff_read_frame_flush(s);
2226 ff_update_cur_dts(s, st, ts);
2231 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
2232 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2234 int64_t step = 1024;
2235 int64_t limit, ts_max;
2236 int64_t filesize = avio_size(s->pb);
2237 int64_t pos_max = filesize - 1;
2240 pos_max = FFMAX(0, (pos_max) - step);
2241 ts_max = ff_read_timestamp(s, stream_index,
2242 &pos_max, limit, read_timestamp);
2244 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
2245 if (ts_max == AV_NOPTS_VALUE)
2249 int64_t tmp_pos = pos_max + 1;
2250 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
2251 &tmp_pos, INT64_MAX, read_timestamp);
2252 if (tmp_ts == AV_NOPTS_VALUE)
2254 av_assert0(tmp_pos > pos_max);
2257 if (tmp_pos >= filesize)
2269 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
2270 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
2271 int64_t ts_min, int64_t ts_max,
2272 int flags, int64_t *ts_ret,
2273 int64_t (*read_timestamp)(struct AVFormatContext *, int,
2274 int64_t *, int64_t))
2281 av_log(s, AV_LOG_TRACE, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2283 if (ts_min == AV_NOPTS_VALUE) {
2284 pos_min = s->internal->data_offset;
2285 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2286 if (ts_min == AV_NOPTS_VALUE)
2290 if (ts_min >= target_ts) {
2295 if (ts_max == AV_NOPTS_VALUE) {
2296 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2298 pos_limit = pos_max;
2301 if (ts_max <= target_ts) {
2306 av_assert0(ts_min < ts_max);
2309 while (pos_min < pos_limit) {
2310 av_log(s, AV_LOG_TRACE,
2311 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2312 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2313 av_assert0(pos_limit <= pos_max);
2315 if (no_change == 0) {
2316 int64_t approximate_keyframe_distance = pos_max - pos_limit;
2317 // interpolate position (better than dichotomy)
2318 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2320 pos_min - approximate_keyframe_distance;
2321 } else if (no_change == 1) {
2322 // bisection if interpolation did not change min / max pos last time
2323 pos = (pos_min + pos_limit) >> 1;
2325 /* linear search if bisection failed, can only happen if there
2326 * are very few or no keyframes between min/max */
2331 else if (pos > pos_limit)
2335 // May pass pos_limit instead of -1.
2336 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2341 av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2342 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2343 pos_min, pos, pos_max,
2344 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2345 pos_limit, start_pos, no_change);
2346 if (ts == AV_NOPTS_VALUE) {
2347 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2350 if (target_ts <= ts) {
2351 pos_limit = start_pos - 1;
2355 if (target_ts >= ts) {
2361 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2362 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2365 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2367 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2368 av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2369 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2375 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2376 int64_t pos, int flags)
2378 int64_t pos_min, pos_max;
2380 pos_min = s->internal->data_offset;
2381 pos_max = avio_size(s->pb) - 1;
2385 else if (pos > pos_max)
2388 avio_seek(s->pb, pos, SEEK_SET);
2390 s->io_repositioned = 1;
2395 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2396 int64_t timestamp, int flags)
2403 st = s->streams[stream_index];
2405 index = av_index_search_timestamp(st, timestamp, flags);
2407 if (index < 0 && st->nb_index_entries &&
2408 timestamp < st->index_entries[0].timestamp)
2411 if (index < 0 || index == st->nb_index_entries - 1) {
2415 if (st->nb_index_entries) {
2416 av_assert0(st->index_entries);
2417 ie = &st->index_entries[st->nb_index_entries - 1];
2418 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2420 ff_update_cur_dts(s, st, ie->timestamp);
2422 if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
2428 read_status = av_read_frame(s, &pkt);
2429 } while (read_status == AVERROR(EAGAIN));
2430 if (read_status < 0)
2432 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2433 if (pkt.flags & AV_PKT_FLAG_KEY) {
2434 av_packet_unref(&pkt);
2437 if (nonkey++ > 1000 && st->codecpar->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2438 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);
2439 av_packet_unref(&pkt);
2443 av_packet_unref(&pkt);
2445 index = av_index_search_timestamp(st, timestamp, flags);
2450 ff_read_frame_flush(s);
2451 if (s->iformat->read_seek)
2452 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2454 ie = &st->index_entries[index];
2455 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2457 ff_update_cur_dts(s, st, ie->timestamp);
2462 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2463 int64_t timestamp, int flags)
2468 if (flags & AVSEEK_FLAG_BYTE) {
2469 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2471 ff_read_frame_flush(s);
2472 return seek_frame_byte(s, stream_index, timestamp, flags);
2475 if (stream_index < 0) {
2476 stream_index = av_find_default_stream_index(s);
2477 if (stream_index < 0)
2480 st = s->streams[stream_index];
2481 /* timestamp for default must be expressed in AV_TIME_BASE units */
2482 timestamp = av_rescale(timestamp, st->time_base.den,
2483 AV_TIME_BASE * (int64_t) st->time_base.num);
2486 /* first, we try the format specific seek */
2487 if (s->iformat->read_seek) {
2488 ff_read_frame_flush(s);
2489 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2495 if (s->iformat->read_timestamp &&
2496 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2497 ff_read_frame_flush(s);
2498 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2499 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2500 ff_read_frame_flush(s);
2501 return seek_frame_generic(s, stream_index, timestamp, flags);
2506 int av_seek_frame(AVFormatContext *s, int stream_index,
2507 int64_t timestamp, int flags)
2511 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2512 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2513 if ((flags & AVSEEK_FLAG_BACKWARD))
2517 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2518 flags & ~AVSEEK_FLAG_BACKWARD);
2521 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2524 ret = avformat_queue_attached_pictures(s);
2529 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2530 int64_t ts, int64_t max_ts, int flags)
2532 if (min_ts > ts || max_ts < ts)
2534 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2535 return AVERROR(EINVAL);
2538 flags |= AVSEEK_FLAG_ANY;
2539 flags &= ~AVSEEK_FLAG_BACKWARD;
2541 if (s->iformat->read_seek2) {
2543 ff_read_frame_flush(s);
2545 if (stream_index == -1 && s->nb_streams == 1) {
2546 AVRational time_base = s->streams[0]->time_base;
2547 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2548 min_ts = av_rescale_rnd(min_ts, time_base.den,
2549 time_base.num * (int64_t)AV_TIME_BASE,
2550 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2551 max_ts = av_rescale_rnd(max_ts, time_base.den,
2552 time_base.num * (int64_t)AV_TIME_BASE,
2553 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2557 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2561 ret = avformat_queue_attached_pictures(s);
2565 if (s->iformat->read_timestamp) {
2566 // try to seek via read_timestamp()
2569 // Fall back on old API if new is not implemented but old is.
2570 // Note the old API has somewhat different semantics.
2571 if (s->iformat->read_seek || 1) {
2572 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2573 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2574 if (ret<0 && ts != min_ts && max_ts != ts) {
2575 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2577 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2582 // try some generic seek like seek_frame_generic() but with new ts semantics
2583 return -1; //unreachable
2586 int avformat_flush(AVFormatContext *s)
2588 ff_read_frame_flush(s);
2592 /*******************************************************/
2595 * Return TRUE if the stream has accurate duration in any stream.
2597 * @return TRUE if the stream has accurate duration for at least one component.
2599 static int has_duration(AVFormatContext *ic)
2604 for (i = 0; i < ic->nb_streams; i++) {
2605 st = ic->streams[i];
2606 if (st->duration != AV_NOPTS_VALUE)
2609 if (ic->duration != AV_NOPTS_VALUE)
2615 * Estimate the stream timings from the one of each components.
2617 * Also computes the global bitrate if possible.
2619 static void update_stream_timings(AVFormatContext *ic)
2621 int64_t start_time, start_time1, start_time_text, end_time, end_time1, end_time_text;
2622 int64_t duration, duration1, duration_text, filesize;
2626 start_time = INT64_MAX;
2627 start_time_text = INT64_MAX;
2628 end_time = INT64_MIN;
2629 end_time_text = INT64_MIN;
2630 duration = INT64_MIN;
2631 duration_text = INT64_MIN;
2633 for (i = 0; i < ic->nb_streams; i++) {
2634 AVStream *st = ic->streams[i];
2635 int is_text = st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ||
2636 st->codecpar->codec_type == AVMEDIA_TYPE_DATA;
2637 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2638 start_time1 = av_rescale_q(st->start_time, st->time_base,
2641 start_time_text = FFMIN(start_time_text, start_time1);
2643 start_time = FFMIN(start_time, start_time1);
2644 end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
2646 AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
2647 if (end_time1 != AV_NOPTS_VALUE && (end_time1 > 0 ? start_time1 <= INT64_MAX - end_time1 : start_time1 >= INT64_MIN - end_time1)) {
2648 end_time1 += start_time1;
2650 end_time_text = FFMAX(end_time_text, end_time1);
2652 end_time = FFMAX(end_time, end_time1);
2654 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2655 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2656 p->start_time = start_time1;
2657 if (p->end_time < end_time1)
2658 p->end_time = end_time1;
2661 if (st->duration != AV_NOPTS_VALUE) {
2662 duration1 = av_rescale_q(st->duration, st->time_base,
2665 duration_text = FFMAX(duration_text, duration1);
2667 duration = FFMAX(duration, duration1);
2670 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - (uint64_t)start_time_text < AV_TIME_BASE))
2671 start_time = start_time_text;
2672 else if (start_time > start_time_text)
2673 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2675 if (end_time == INT64_MIN || (end_time < end_time_text && end_time_text - (uint64_t)end_time < AV_TIME_BASE))
2676 end_time = end_time_text;
2677 else if (end_time < end_time_text)
2678 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE);
2680 if (duration == INT64_MIN || (duration < duration_text && duration_text - duration < AV_TIME_BASE))
2681 duration = duration_text;
2682 else if (duration < duration_text)
2683 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE);
2685 if (start_time != INT64_MAX) {
2686 ic->start_time = start_time;
2687 if (end_time != INT64_MIN) {
2688 if (ic->nb_programs > 1) {
2689 for (i = 0; i < ic->nb_programs; i++) {
2690 p = ic->programs[i];
2691 if (p->start_time != AV_NOPTS_VALUE &&
2692 p->end_time > p->start_time &&
2693 p->end_time - (uint64_t)p->start_time <= INT64_MAX)
2694 duration = FFMAX(duration, p->end_time - p->start_time);
2696 } else if (end_time >= start_time && end_time - (uint64_t)start_time <= INT64_MAX) {
2697 duration = FFMAX(duration, end_time - start_time);
2701 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2702 ic->duration = duration;
2704 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration > 0) {
2705 /* compute the bitrate */
2706 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2707 (double) ic->duration;
2708 if (bitrate >= 0 && bitrate <= INT64_MAX)
2709 ic->bit_rate = bitrate;
2713 static void fill_all_stream_timings(AVFormatContext *ic)
2718 update_stream_timings(ic);
2719 for (i = 0; i < ic->nb_streams; i++) {
2720 st = ic->streams[i];
2721 if (st->start_time == AV_NOPTS_VALUE) {
2722 if (ic->start_time != AV_NOPTS_VALUE)
2723 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2725 if (ic->duration != AV_NOPTS_VALUE)
2726 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2732 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2734 int64_t filesize, duration;
2735 int i, show_warning = 0;
2738 /* if bit_rate is already set, we believe it */
2739 if (ic->bit_rate <= 0) {
2740 int64_t bit_rate = 0;
2741 for (i = 0; i < ic->nb_streams; i++) {
2742 st = ic->streams[i];
2743 if (st->codecpar->bit_rate <= 0 && st->internal->avctx->bit_rate > 0)
2744 st->codecpar->bit_rate = st->internal->avctx->bit_rate;
2745 if (st->codecpar->bit_rate > 0) {
2746 if (INT64_MAX - st->codecpar->bit_rate < bit_rate) {
2750 bit_rate += st->codecpar->bit_rate;
2751 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2752 // If we have a videostream with packets but without a bitrate
2753 // then consider the sum not known
2758 ic->bit_rate = bit_rate;
2761 /* if duration is already set, we believe it */
2762 if (ic->duration == AV_NOPTS_VALUE &&
2763 ic->bit_rate != 0) {
2764 filesize = ic->pb ? avio_size(ic->pb) : 0;
2765 if (filesize > ic->internal->data_offset) {
2766 filesize -= ic->internal->data_offset;
2767 for (i = 0; i < ic->nb_streams; i++) {
2768 st = ic->streams[i];
2769 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2770 && st->duration == AV_NOPTS_VALUE) {
2771 duration = av_rescale(8 * filesize, st->time_base.den,
2773 (int64_t) st->time_base.num);
2774 st->duration = duration;
2781 av_log(ic, AV_LOG_WARNING,
2782 "Estimating duration from bitrate, this may be inaccurate\n");
2785 #define DURATION_MAX_READ_SIZE 250000LL
2786 #define DURATION_MAX_RETRY 6
2788 /* only usable for MPEG-PS streams */
2789 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2791 AVPacket pkt1, *pkt = &pkt1;
2793 int num, den, read_size, i, ret;
2794 int found_duration = 0;
2796 int64_t filesize, offset, duration;
2799 /* flush packet queue */
2800 flush_packet_queue(ic);
2802 for (i = 0; i < ic->nb_streams; i++) {
2803 st = ic->streams[i];
2804 if (st->start_time == AV_NOPTS_VALUE &&
2805 st->first_dts == AV_NOPTS_VALUE &&
2806 st->codecpar->codec_type != AVMEDIA_TYPE_UNKNOWN)
2807 av_log(ic, AV_LOG_WARNING,
2808 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2811 av_parser_close(st->parser);
2816 if (ic->skip_estimate_duration_from_pts) {
2817 av_log(ic, AV_LOG_INFO, "Skipping duration calculation in estimate_timings_from_pts\n");
2818 goto skip_duration_calc;
2821 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2822 /* estimate the end time (duration) */
2823 /* XXX: may need to support wrapping */
2824 filesize = ic->pb ? avio_size(ic->pb) : 0;
2826 is_end = found_duration;
2827 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2831 avio_seek(ic->pb, offset, SEEK_SET);
2834 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2838 ret = ff_read_packet(ic, pkt);
2839 } while (ret == AVERROR(EAGAIN));
2842 read_size += pkt->size;
2843 st = ic->streams[pkt->stream_index];
2844 if (pkt->pts != AV_NOPTS_VALUE &&
2845 (st->start_time != AV_NOPTS_VALUE ||
2846 st->first_dts != AV_NOPTS_VALUE)) {
2847 if (pkt->duration == 0) {
2848 ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2850 pkt->duration = av_rescale_rnd(1,
2851 num * (int64_t) st->time_base.den,
2852 den * (int64_t) st->time_base.num,
2856 duration = pkt->pts + pkt->duration;
2858 if (st->start_time != AV_NOPTS_VALUE)
2859 duration -= st->start_time;
2861 duration -= st->first_dts;
2863 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2864 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2865 st->duration = duration;
2866 st->info->last_duration = duration;
2869 av_packet_unref(pkt);
2872 /* check if all audio/video streams have valid duration */
2875 for (i = 0; i < ic->nb_streams; i++) {
2876 st = ic->streams[i];
2877 switch (st->codecpar->codec_type) {
2878 case AVMEDIA_TYPE_VIDEO:
2879 case AVMEDIA_TYPE_AUDIO:
2880 if (st->duration == AV_NOPTS_VALUE)
2887 ++retry <= DURATION_MAX_RETRY);
2889 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2891 /* warn about audio/video streams which duration could not be estimated */
2892 for (i = 0; i < ic->nb_streams; i++) {
2893 st = ic->streams[i];
2894 if (st->duration == AV_NOPTS_VALUE) {
2895 switch (st->codecpar->codec_type) {
2896 case AVMEDIA_TYPE_VIDEO:
2897 case AVMEDIA_TYPE_AUDIO:
2898 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2899 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2901 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2906 fill_all_stream_timings(ic);
2908 avio_seek(ic->pb, old_offset, SEEK_SET);
2909 for (i = 0; i < ic->nb_streams; i++) {
2912 st = ic->streams[i];
2913 st->cur_dts = st->first_dts;
2914 st->last_IP_pts = AV_NOPTS_VALUE;
2915 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2916 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2917 st->pts_buffer[j] = AV_NOPTS_VALUE;
2921 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2925 /* get the file size, if possible */
2926 if (ic->iformat->flags & AVFMT_NOFILE) {
2929 file_size = avio_size(ic->pb);
2930 file_size = FFMAX(0, file_size);
2933 if ((!strcmp(ic->iformat->name, "mpeg") ||
2934 !strcmp(ic->iformat->name, "mpegts")) &&
2935 file_size && (ic->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2936 /* get accurate estimate from the PTSes */
2937 estimate_timings_from_pts(ic, old_offset);
2938 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2939 } else if (has_duration(ic)) {
2940 /* at least one component has timings - we use them for all
2942 fill_all_stream_timings(ic);
2943 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2945 /* less precise: use bitrate info */
2946 estimate_timings_from_bit_rate(ic);
2947 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2949 update_stream_timings(ic);
2953 AVStream av_unused *st;
2954 for (i = 0; i < ic->nb_streams; i++) {
2955 st = ic->streams[i];
2956 if (st->time_base.den)
2957 av_log(ic, AV_LOG_TRACE, "stream %d: start_time: %0.3f duration: %0.3f\n", i,
2958 (double) st->start_time * av_q2d(st->time_base),
2959 (double) st->duration * av_q2d(st->time_base));
2961 av_log(ic, AV_LOG_TRACE,
2962 "format: start_time: %0.3f duration: %0.3f bitrate=%"PRId64" kb/s\n",
2963 (double) ic->start_time / AV_TIME_BASE,
2964 (double) ic->duration / AV_TIME_BASE,
2965 (int64_t)ic->bit_rate / 1000);
2969 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2971 AVCodecContext *avctx = st->internal->avctx;
2973 #define FAIL(errmsg) do { \
2975 *errmsg_ptr = errmsg; \
2979 if ( avctx->codec_id == AV_CODEC_ID_NONE
2980 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2981 FAIL("unknown codec");
2982 switch (avctx->codec_type) {
2983 case AVMEDIA_TYPE_AUDIO:
2984 if (!avctx->frame_size && determinable_frame_size(avctx))
2985 FAIL("unspecified frame size");
2986 if (st->info->found_decoder >= 0 &&
2987 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2988 FAIL("unspecified sample format");
2989 if (!avctx->sample_rate)
2990 FAIL("unspecified sample rate");
2991 if (!avctx->channels)
2992 FAIL("unspecified number of channels");
2993 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2994 FAIL("no decodable DTS frames");
2996 case AVMEDIA_TYPE_VIDEO:
2998 FAIL("unspecified size");
2999 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
3000 FAIL("unspecified pixel format");
3001 if (st->codecpar->codec_id == AV_CODEC_ID_RV30 || st->codecpar->codec_id == AV_CODEC_ID_RV40)
3002 if (!st->sample_aspect_ratio.num && !st->codecpar->sample_aspect_ratio.num && !st->codec_info_nb_frames)
3003 FAIL("no frame in rv30/40 and no sar");
3005 case AVMEDIA_TYPE_SUBTITLE:
3006 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
3007 FAIL("unspecified size");
3009 case AVMEDIA_TYPE_DATA:
3010 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
3016 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
3017 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
3018 AVDictionary **options)
3020 AVCodecContext *avctx = st->internal->avctx;
3021 const AVCodec *codec;
3022 int got_picture = 1, ret = 0;
3023 AVFrame *frame = av_frame_alloc();
3024 AVSubtitle subtitle;
3025 AVPacket pkt = *avpkt;
3026 int do_skip_frame = 0;
3027 enum AVDiscard skip_frame;
3030 return AVERROR(ENOMEM);
3032 if (!avcodec_is_open(avctx) &&
3033 st->info->found_decoder <= 0 &&
3034 (st->codecpar->codec_id != -st->info->found_decoder || !st->codecpar->codec_id)) {
3035 AVDictionary *thread_opt = NULL;
3037 codec = find_probe_decoder(s, st, st->codecpar->codec_id);
3040 st->info->found_decoder = -st->codecpar->codec_id;
3045 /* Force thread count to 1 since the H.264 decoder will not extract
3046 * SPS and PPS to extradata during multi-threaded decoding. */
3047 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
3048 if (s->codec_whitelist)
3049 av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
3050 ret = avcodec_open2(avctx, codec, options ? options : &thread_opt);
3052 av_dict_free(&thread_opt);
3054 st->info->found_decoder = -avctx->codec_id;
3057 st->info->found_decoder = 1;
3058 } else if (!st->info->found_decoder)
3059 st->info->found_decoder = 1;
3061 if (st->info->found_decoder < 0) {
3066 if (avpriv_codec_get_cap_skip_frame_fill_param(avctx->codec)) {
3068 skip_frame = avctx->skip_frame;
3069 avctx->skip_frame = AVDISCARD_ALL;
3072 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
3074 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
3075 (!st->codec_info_nb_frames &&
3076 (avctx->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)))) {
3078 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3079 avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
3080 ret = avcodec_send_packet(avctx, &pkt);
3081 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3085 ret = avcodec_receive_frame(avctx, frame);
3088 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
3090 } else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3091 ret = avcodec_decode_subtitle2(avctx, &subtitle,
3092 &got_picture, &pkt);
3098 st->nb_decoded_frames++;
3103 if (!pkt.data && !got_picture)
3107 if (do_skip_frame) {
3108 avctx->skip_frame = skip_frame;
3111 av_frame_free(&frame);
3115 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
3117 while (tags->id != AV_CODEC_ID_NONE) {
3125 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
3128 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3129 if (tag == tags[i].tag)
3131 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3132 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
3134 return AV_CODEC_ID_NONE;
3137 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
3139 if (bps <= 0 || bps > 64)
3140 return AV_CODEC_ID_NONE;
3145 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
3147 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
3149 return AV_CODEC_ID_NONE;
3154 if (sflags & (1 << (bps - 1))) {
3157 return AV_CODEC_ID_PCM_S8;
3159 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
3161 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
3163 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
3165 return be ? AV_CODEC_ID_PCM_S64BE : AV_CODEC_ID_PCM_S64LE;
3167 return AV_CODEC_ID_NONE;
3172 return AV_CODEC_ID_PCM_U8;
3174 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
3176 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
3178 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
3180 return AV_CODEC_ID_NONE;
3186 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
3189 if (!av_codec_get_tag2(tags, id, &tag))
3194 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
3198 for (i = 0; tags && tags[i]; i++) {
3199 const AVCodecTag *codec_tags = tags[i];
3200 while (codec_tags->id != AV_CODEC_ID_NONE) {
3201 if (codec_tags->id == id) {
3202 *tag = codec_tags->tag;
3211 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
3214 for (i = 0; tags && tags[i]; i++) {
3215 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
3216 if (id != AV_CODEC_ID_NONE)
3219 return AV_CODEC_ID_NONE;
3222 static void compute_chapters_end(AVFormatContext *s)
3225 int64_t max_time = 0;
3227 if (s->duration > 0 && s->start_time < INT64_MAX - s->duration)
3228 max_time = s->duration +
3229 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
3231 for (i = 0; i < s->nb_chapters; i++)
3232 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
3233 AVChapter *ch = s->chapters[i];
3234 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
3238 for (j = 0; j < s->nb_chapters; j++) {
3239 AVChapter *ch1 = s->chapters[j];
3240 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
3242 if (j != i && next_start > ch->start && next_start < end)
3245 ch->end = (end == INT64_MAX || end < ch->start) ? ch->start : end;
3249 static int get_std_framerate(int i)
3252 return (i + 1) * 1001;
3256 return (i + 31) * 1001 * 12;
3260 return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
3264 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
3267 /* Is the time base unreliable?
3268 * This is a heuristic to balance between quick acceptance of the values in
3269 * the headers vs. some extra checks.
3270 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
3271 * MPEG-2 commonly misuses field repeat flags to store different framerates.
3272 * And there are "variable" fps files this needs to detect as well. */
3273 static int tb_unreliable(AVCodecContext *c)
3275 if (c->time_base.den >= 101LL * c->time_base.num ||
3276 c->time_base.den < 5LL * c->time_base.num ||
3277 // c->codec_tag == AV_RL32("DIVX") ||
3278 // c->codec_tag == AV_RL32("XVID") ||
3279 c->codec_tag == AV_RL32("mp4v") ||
3280 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
3281 c->codec_id == AV_CODEC_ID_GIF ||
3282 c->codec_id == AV_CODEC_ID_HEVC ||
3283 c->codec_id == AV_CODEC_ID_H264)
3288 int ff_alloc_extradata(AVCodecParameters *par, int size)
3290 av_freep(&par->extradata);
3291 par->extradata_size = 0;
3293 if (size < 0 || size >= INT32_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
3294 return AVERROR(EINVAL);
3296 par->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
3297 if (!par->extradata)
3298 return AVERROR(ENOMEM);
3300 memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3301 par->extradata_size = size;