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
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"
40 #include "libavcodec/bytestream.h"
41 #include "libavcodec/internal.h"
42 #include "libavcodec/raw.h"
44 #include "audiointerleave.h"
46 #include "avio_internal.h"
58 * various utility functions for use within FFmpeg
61 unsigned avformat_version(void)
63 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
64 return LIBAVFORMAT_VERSION_INT;
67 const char *avformat_configuration(void)
69 return FFMPEG_CONFIGURATION;
72 const char *avformat_license(void)
74 #define LICENSE_PREFIX "libavformat license: "
75 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
78 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
80 static int is_relative(int64_t ts) {
81 return ts > (RELATIVE_TS_BASE - (1LL<<48));
85 * Wrap a given time stamp, if there is an indication for an overflow
88 * @param timestamp the time stamp to wrap
89 * @return resulting time stamp
91 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
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);
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)
113 int64_t av_stream_get_end_pts(const AVStream *st)
118 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
123 void av_format_inject_global_side_data(AVFormatContext *s)
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;
133 static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
135 if (st->codec->codec)
136 return st->codec->codec;
138 switch (st->codec->codec_type) {
139 case AVMEDIA_TYPE_VIDEO:
140 if (s->video_codec) return s->video_codec;
142 case AVMEDIA_TYPE_AUDIO:
143 if (s->audio_codec) return s->audio_codec;
145 case AVMEDIA_TYPE_SUBTITLE:
146 if (s->subtitle_codec) return s->subtitle_codec;
150 return avcodec_find_decoder(codec_id);
153 int av_format_get_probe_score(const AVFormatContext *s)
155 return s->probe_score;
158 /* an arbitrarily chosen "sane" max packet size -- 50M */
159 #define SANE_CHUNK_SIZE (50000000)
161 int ffio_limit(AVIOContext *s, int size)
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);
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);
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)
185 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
186 int orig_size = pkt->size;
190 int prev_size = pkt->size;
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. */
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
200 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
203 ret = av_grow_packet(pkt, read_size);
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));
216 pkt->flags |= AV_PKT_FLAG_CORRUPT;
221 return pkt->size > orig_size ? pkt->size - orig_size : ret;
224 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
229 pkt->pos = avio_tell(s);
231 return append_packet_chunked(s, pkt, size);
234 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
237 return av_get_packet(s, pkt, size);
238 return append_packet_chunked(s, pkt, size);
241 int av_filename_number_test(const char *filename)
245 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
248 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
251 static const struct {
254 enum AVMediaType 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 },
269 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
271 if (fmt && st->request_probe <= score) {
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,
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;
288 /************************************************************/
289 /* input media file */
291 int av_demuxer_open(AVFormatContext *ic) {
294 if (ic->iformat->read_header) {
295 err = ic->iformat->read_header(ic);
300 if (ic->pb && !ic->data_offset)
301 ic->data_offset = avio_tell(ic->pb);
306 /* Open input file and probe the format if necessary. */
307 static int init_input(AVFormatContext *s, const char *filename,
308 AVDictionary **options)
311 AVProbeData pd = { filename, NULL, 0 };
312 int score = AVPROBE_SCORE_RETRY;
315 s->flags |= AVFMT_FLAG_CUSTOM_IO;
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");
325 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
326 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
329 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
330 &s->interrupt_callback, options)) < 0)
334 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
335 s, 0, s->format_probesize);
338 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
339 AVPacketList **plast_pktl)
341 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
346 (*plast_pktl)->next = pktl;
348 *packet_buffer = pktl;
350 /* Add the packet in the buffered packet list. */
356 int avformat_queue_attached_pictures(AVFormatContext *s)
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, "
369 copy.buf = av_buffer_ref(copy.buf);
371 return AVERROR(ENOMEM);
373 add_to_pktbuf(&s->raw_packet_buffer, ©,
374 &s->raw_packet_buffer_end);
379 int avformat_open_input(AVFormatContext **ps, const char *filename,
380 AVInputFormat *fmt, AVDictionary **options)
382 AVFormatContext *s = *ps;
384 AVDictionary *tmp = NULL;
385 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
387 if (!s && !(s = avformat_alloc_context()))
388 return AVERROR(ENOMEM);
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);
397 av_dict_copy(&tmp, *options, 0);
399 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
402 if ((ret = init_input(s, filename, &tmp)) < 0)
404 s->probe_score = ret;
405 avio_skip(s->pb, s->skip_initial_bytes);
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);
415 s->duration = s->start_time = AV_NOPTS_VALUE;
416 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
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);
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)
432 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
434 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0);
436 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
437 if ((ret = s->iformat->read_header(s)) < 0)
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)
446 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
448 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
450 if ((ret = avformat_queue_attached_pictures(s)) < 0)
453 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
454 s->data_offset = avio_tell(s->pb);
456 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
459 av_dict_free(options);
466 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
468 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
470 avformat_free_context(s);
475 /*******************************************************/
477 static void force_codec_ids(AVFormatContext *s, AVStream *st)
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;
484 case AVMEDIA_TYPE_AUDIO:
485 if (s->audio_codec_id)
486 st->codec->codec_id = s->audio_codec_id;
488 case AVMEDIA_TYPE_SUBTITLE:
489 if (s->subtitle_codec_id)
490 st->codec->codec_id = s->subtitle_codec_id;
495 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
497 if (st->request_probe>0) {
498 AVProbeData *pd = &st->probe_data;
500 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
504 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
506 av_log(s, AV_LOG_WARNING,
507 "Failed to reallocate probe buffer for stream %d\n",
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);
517 st->probe_packets = 0;
519 av_log(s, AV_LOG_WARNING,
520 "nothing to probe for stream %d\n", st->index);
524 end= s->raw_packet_buffer_remaining_size <= 0
525 || st->probe_packets<= 0;
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)
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);
537 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
539 force_codec_ids(s, st);
545 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
547 int64_t ref = pkt->dts;
548 int i, pts_wrap_behavior;
549 int64_t pts_wrap_reference;
550 AVProgram *first_program;
552 if (ref == AV_NOPTS_VALUE)
554 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
556 ref &= (1LL << st->pts_wrap_bits)-1;
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;
565 first_program = av_find_program_from_stream(s, NULL, stream_index);
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;
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;
581 AVProgram *program = first_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;
588 program = av_find_program_from_stream(s, program, stream_index);
591 // update every program with differing pts_wrap_reference
592 program = first_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;
600 program->pts_wrap_reference = pts_wrap_reference;
601 program->pts_wrap_behavior = pts_wrap_behavior;
603 program = av_find_program_from_stream(s, program, stream_index);
609 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
615 AVPacketList *pktl = s->raw_packet_buffer;
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)
623 if (st->request_probe <= 0) {
624 s->raw_packet_buffer = pktl->next;
625 s->raw_packet_buffer_remaining_size += pkt->size;
634 ret = s->iformat->read_packet(s, pkt);
636 if (!pktl || ret == AVERROR(EAGAIN))
638 for (i = 0; i < s->nb_streams; i++) {
640 if (st->probe_packets)
641 if ((err = probe_codec(s, st, NULL)) < 0)
643 av_assert0(st->request_probe <= 0);
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",
657 if (pkt->stream_index >= (unsigned)s->nb_streams) {
658 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
662 st = s->streams[pkt->stream_index];
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);
674 pkt->dts = wrap_timestamp(st, pkt->dts);
675 pkt->pts = wrap_timestamp(st, pkt->pts);
677 force_codec_ids(s, st);
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);
683 if (!pktl && st->request_probe <= 0)
686 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
687 s->raw_packet_buffer_remaining_size -= pkt->size;
689 if ((err = probe_codec(s, st, pkt)) < 0)
694 #if FF_API_READ_PACKET
695 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
697 return ff_read_packet(s, pkt);
702 /**********************************************************/
704 static int determinable_frame_size(AVCodecContext *avctx)
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*/)
716 * Return the frame duration in seconds. Return 0 if not available.
718 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
719 AVCodecParserContext *pc, AVPacket *pkt)
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;
740 *pnum *= 1 + pc->repeat_pict;
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)
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)
754 *pden = st->codec->sample_rate;
761 static int is_intra_only(AVCodecContext *enc) {
762 const AVCodecDescriptor *desc;
764 if (enc->codec_type != AVMEDIA_TYPE_VIDEO)
767 desc = av_codec_get_codec_descriptor(enc);
769 desc = avcodec_descriptor_get(enc->codec_id);
770 av_codec_set_codec_descriptor(enc, desc);
773 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
777 static int has_decode_delay_been_guessed(AVStream *st)
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
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)
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;
792 return st->nb_decoded_frames >= 20;
795 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
799 if (pktl == s->packet_buffer_end)
800 return s->parse_queue;
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;
809 int delay = st->codec->has_b_frames;
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) {
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;
840 if (dts == AV_NOPTS_VALUE)
846 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
847 int64_t dts, int64_t pts, AVPacket *pkt)
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];
855 if (st->first_dts != AV_NOPTS_VALUE ||
856 dts == AV_NOPTS_VALUE ||
857 st->cur_dts == AV_NOPTS_VALUE ||
861 delay = st->codec->has_b_frames;
862 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
864 shift = st->first_dts - RELATIVE_TS_BASE;
866 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
867 pts_buffer[i] = AV_NOPTS_VALUE;
869 if (is_relative(pts))
872 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
873 if (pktl->pkt.stream_index != stream_index)
875 if (is_relative(pktl->pkt.pts))
876 pktl->pkt.pts += shift;
878 if (is_relative(pktl->pkt.dts))
879 pktl->pkt.dts += shift;
881 if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
882 st->start_time = pktl->pkt.pts;
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]);
889 pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
893 if (st->start_time == AV_NOPTS_VALUE)
894 st->start_time = pts;
897 static void update_initial_durations(AVFormatContext *s, AVStream *st,
898 int stream_index, int duration)
900 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
901 int64_t cur_dts = RELATIVE_TS_BASE;
903 if (st->first_dts != AV_NOPTS_VALUE) {
904 if (st->update_initial_durations_done)
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 ||
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);
923 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
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)
931 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
932 if (pktl->pkt.stream_index != stream_index)
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;
944 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
947 st->cur_dts = cur_dts;
950 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
951 AVCodecParserContext *pc, AVPacket *pkt)
953 int num, den, presentation_delayed, delay, i;
956 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
957 st->codec->codec_id != AV_CODEC_ID_HEVC;
959 if (s->flags & AVFMT_FLAG_NOFILLIN)
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) {
967 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
968 "DTS %"PRIi64" < %"PRIi64" out of order\n",
970 st->last_dts_for_order_check);
971 st->dts_misordered++;
973 if (st->dts_ordered + st->dts_misordered > 250) {
974 st->dts_ordered >>= 1;
975 st->dts_misordered >>= 1;
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;
984 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
985 pkt->dts = AV_NOPTS_VALUE;
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;
992 /* do we have a video B-frame ? */
993 delay = st->codec->has_b_frames;
994 presentation_delayed = 0;
996 /* XXX: need has_b_frame, but cannot get it if the codec is
999 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1000 presentation_delayed = 1;
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;
1008 pkt->pts += 1LL << st->pts_wrap_bits;
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;
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);
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,
1035 if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1036 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
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)
1045 if (pkt->dts != AV_NOPTS_VALUE)
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;
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)) &&
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;
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 ||
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,
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);
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]);
1104 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1106 // We skipped it above so we try here.
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;
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));
1117 if (is_intra_only(st->codec))
1118 pkt->flags |= AV_PKT_FLAG_KEY;
1120 pkt->convergence_duration = pc->convergence_duration;
1123 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1126 AVPacketList *pktl = *pkt_buf;
1127 *pkt_buf = pktl->next;
1128 av_free_packet(&pktl->pkt);
1131 *pkt_buf_end = NULL;
1135 * Parse a packet, add all split parts to parse_queue.
1137 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1139 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
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;
1148 av_init_packet(&flush_pkt);
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);
1156 while (size > 0 || (pkt == &flush_pkt && got_output)) {
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);
1164 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1166 /* increment read pointer */
1170 got_output = !!out_pkt.size;
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;
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) {
1187 av_rescale_q_rnd(st->parser->duration,
1188 (AVRational) { 1, st->codec->sample_rate },
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;
1199 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1200 out_pkt.pos = st->parser->frame_offset;
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;
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;
1210 compute_pkt_fields(s, st, st->parser, &out_pkt);
1212 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1213 out_pkt.buf = pkt->buf;
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
1222 if ((ret = av_dup_packet(&out_pkt)) < 0)
1225 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1226 av_free_packet(&out_pkt);
1227 ret = AVERROR(ENOMEM);
1232 /* end of the stream => close and free the parser */
1233 if (pkt == &flush_pkt) {
1234 av_parser_close(st->parser);
1239 av_free_packet(pkt);
1243 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1244 AVPacketList **pkt_buffer_end,
1248 av_assert0(*pkt_buffer);
1251 *pkt_buffer = pktl->next;
1253 *pkt_buffer_end = NULL;
1258 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1260 return av_rescale(ts, st->time_base.num * st->codec->sample_rate, st->time_base.den);
1263 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1265 int ret = 0, i, got_packet = 0;
1266 AVDictionary *metadata = NULL;
1268 av_init_packet(pkt);
1270 while (!got_packet && !s->parse_queue) {
1274 /* read next packet */
1275 ret = ff_read_packet(s, &cur_pkt);
1277 if (ret == AVERROR(EAGAIN))
1279 /* flush the parsers */
1280 for (i = 0; i < s->nb_streams; i++) {
1282 if (st->parser && st->need_parsing)
1283 parse_packet(s, NULL, st->index);
1285 /* all remaining packets are now in parse_queue =>
1286 * really terminate parsing */
1290 st = s->streams[cur_pkt.stream_index];
1292 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1293 cur_pkt.dts != AV_NOPTS_VALUE &&
1294 cur_pkt.pts < cur_pkt.dts) {
1295 av_log(s, AV_LOG_WARNING,
1296 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1297 cur_pkt.stream_index,
1298 av_ts2str(cur_pkt.pts),
1299 av_ts2str(cur_pkt.dts),
1302 if (s->debug & FF_FDEBUG_TS)
1303 av_log(s, AV_LOG_DEBUG,
1304 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1305 cur_pkt.stream_index,
1306 av_ts2str(cur_pkt.pts),
1307 av_ts2str(cur_pkt.dts),
1308 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1310 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1311 st->parser = av_parser_init(st->codec->codec_id);
1313 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1314 "%s, packets or times may be invalid.\n",
1315 avcodec_get_name(st->codec->codec_id));
1316 /* no parser available: just output the raw packets */
1317 st->need_parsing = AVSTREAM_PARSE_NONE;
1318 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1319 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1320 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1321 st->parser->flags |= PARSER_FLAG_ONCE;
1322 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1323 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1326 if (!st->need_parsing || !st->parser) {
1327 /* no parsing needed: we just output the packet as is */
1329 compute_pkt_fields(s, st, NULL, pkt);
1330 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1331 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1332 ff_reduce_index(s, st->index);
1333 av_add_index_entry(st, pkt->pos, pkt->dts,
1334 0, 0, AVINDEX_KEYFRAME);
1337 } else if (st->discard < AVDISCARD_ALL) {
1338 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1342 av_free_packet(&cur_pkt);
1344 if (pkt->flags & AV_PKT_FLAG_KEY)
1345 st->skip_to_keyframe = 0;
1346 if (st->skip_to_keyframe) {
1347 av_free_packet(&cur_pkt);
1355 if (!got_packet && s->parse_queue)
1356 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1359 AVStream *st = s->streams[pkt->stream_index];
1360 int discard_padding = 0;
1361 if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1362 int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1363 int64_t sample = ts_to_samples(st, pts);
1364 int duration = ts_to_samples(st, pkt->duration);
1365 int64_t end_sample = sample + duration;
1366 if (duration > 0 && end_sample >= st->first_discard_sample &&
1367 sample < st->last_discard_sample)
1368 discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1370 if (st->skip_samples || discard_padding) {
1371 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1373 AV_WL32(p, st->skip_samples);
1374 AV_WL32(p + 4, discard_padding);
1375 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1377 st->skip_samples = 0;
1380 if (st->inject_global_side_data) {
1381 for (i = 0; i < st->nb_side_data; i++) {
1382 AVPacketSideData *src_sd = &st->side_data[i];
1385 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1388 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1390 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1394 memcpy(dst_data, src_sd->data, src_sd->size);
1396 st->inject_global_side_data = 0;
1399 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1400 av_packet_merge_side_data(pkt);
1403 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1405 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1406 av_dict_copy(&s->metadata, metadata, 0);
1407 av_dict_free(&metadata);
1408 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1411 if (s->debug & FF_FDEBUG_TS)
1412 av_log(s, AV_LOG_DEBUG,
1413 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1414 "size=%d, duration=%d, flags=%d\n",
1416 av_ts2str(pkt->pts),
1417 av_ts2str(pkt->dts),
1418 pkt->size, pkt->duration, pkt->flags);
1423 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1425 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1431 ret = s->packet_buffer
1432 ? read_from_packet_buffer(&s->packet_buffer,
1433 &s->packet_buffer_end, pkt)
1434 : read_frame_internal(s, pkt);
1441 AVPacketList *pktl = s->packet_buffer;
1444 AVPacket *next_pkt = &pktl->pkt;
1446 if (next_pkt->dts != AV_NOPTS_VALUE) {
1447 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1448 // last dts seen for this stream. if any of packets following
1449 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1450 int64_t last_dts = next_pkt->dts;
1451 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1452 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1453 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1454 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1456 next_pkt->pts = pktl->pkt.dts;
1458 if (last_dts != AV_NOPTS_VALUE) {
1459 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1460 last_dts = pktl->pkt.dts;
1465 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1466 // Fixing the last reference frame had none pts issue (For MXF etc).
1467 // We only do this when
1469 // 2. we are not able to resolve a pts value for current packet.
1470 // 3. the packets for this stream at the end of the files had valid dts.
1471 next_pkt->pts = last_dts + next_pkt->duration;
1473 pktl = s->packet_buffer;
1476 /* read packet from packet buffer, if there is data */
1477 st = s->streams[next_pkt->stream_index];
1478 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1479 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1480 ret = read_from_packet_buffer(&s->packet_buffer,
1481 &s->packet_buffer_end, pkt);
1486 ret = read_frame_internal(s, pkt);
1488 if (pktl && ret != AVERROR(EAGAIN)) {
1495 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1496 &s->packet_buffer_end)) < 0)
1497 return AVERROR(ENOMEM);
1502 st = s->streams[pkt->stream_index];
1503 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1504 ff_reduce_index(s, st->index);
1505 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1508 if (is_relative(pkt->dts))
1509 pkt->dts -= RELATIVE_TS_BASE;
1510 if (is_relative(pkt->pts))
1511 pkt->pts -= RELATIVE_TS_BASE;
1516 /* XXX: suppress the packet queue */
1517 static void flush_packet_queue(AVFormatContext *s)
1519 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1520 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1521 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1523 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1526 /*******************************************************/
1529 int av_find_default_stream_index(AVFormatContext *s)
1533 int best_stream = 0;
1534 int best_score = -1;
1536 if (s->nb_streams <= 0)
1538 for (i = 0; i < s->nb_streams; i++) {
1541 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1542 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1543 if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames)
1548 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1549 if (!st->codec->sample_rate && !st->codec_info_nb_frames)
1555 if (score > best_score) {
1563 /** Flush the frame reader. */
1564 void ff_read_frame_flush(AVFormatContext *s)
1569 flush_packet_queue(s);
1571 /* Reset read state for each stream. */
1572 for (i = 0; i < s->nb_streams; i++) {
1576 av_parser_close(st->parser);
1579 st->last_IP_pts = AV_NOPTS_VALUE;
1580 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1581 if (st->first_dts == AV_NOPTS_VALUE)
1582 st->cur_dts = RELATIVE_TS_BASE;
1584 /* We set the current DTS to an unspecified origin. */
1585 st->cur_dts = AV_NOPTS_VALUE;
1587 st->probe_packets = MAX_PROBE_PACKETS;
1589 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1590 st->pts_buffer[j] = AV_NOPTS_VALUE;
1592 if (s->internal->inject_global_side_data)
1593 st->inject_global_side_data = 1;
1597 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1601 for (i = 0; i < s->nb_streams; i++) {
1602 AVStream *st = s->streams[i];
1605 av_rescale(timestamp,
1606 st->time_base.den * (int64_t) ref_st->time_base.num,
1607 st->time_base.num * (int64_t) ref_st->time_base.den);
1611 void ff_reduce_index(AVFormatContext *s, int stream_index)
1613 AVStream *st = s->streams[stream_index];
1614 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1616 if ((unsigned) st->nb_index_entries >= max_entries) {
1618 for (i = 0; 2 * i < st->nb_index_entries; i++)
1619 st->index_entries[i] = st->index_entries[2 * i];
1620 st->nb_index_entries = i;
1624 int ff_add_index_entry(AVIndexEntry **index_entries,
1625 int *nb_index_entries,
1626 unsigned int *index_entries_allocated_size,
1627 int64_t pos, int64_t timestamp,
1628 int size, int distance, int flags)
1630 AVIndexEntry *entries, *ie;
1633 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1636 if (timestamp == AV_NOPTS_VALUE)
1637 return AVERROR(EINVAL);
1639 if (size < 0 || size > 0x3FFFFFFF)
1640 return AVERROR(EINVAL);
1642 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1643 timestamp -= RELATIVE_TS_BASE;
1645 entries = av_fast_realloc(*index_entries,
1646 index_entries_allocated_size,
1647 (*nb_index_entries + 1) *
1648 sizeof(AVIndexEntry));
1652 *index_entries = entries;
1654 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1655 timestamp, AVSEEK_FLAG_ANY);
1658 index = (*nb_index_entries)++;
1659 ie = &entries[index];
1660 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1662 ie = &entries[index];
1663 if (ie->timestamp != timestamp) {
1664 if (ie->timestamp <= timestamp)
1666 memmove(entries + index + 1, entries + index,
1667 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1668 (*nb_index_entries)++;
1669 } else if (ie->pos == pos && distance < ie->min_distance)
1670 // do not reduce the distance
1671 distance = ie->min_distance;
1675 ie->timestamp = timestamp;
1676 ie->min_distance = distance;
1683 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1684 int size, int distance, int flags)
1686 timestamp = wrap_timestamp(st, timestamp);
1687 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1688 &st->index_entries_allocated_size, pos,
1689 timestamp, size, distance, flags);
1692 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1693 int64_t wanted_timestamp, int flags)
1701 // Optimize appending index entries at the end.
1702 if (b && entries[b - 1].timestamp < wanted_timestamp)
1707 timestamp = entries[m].timestamp;
1708 if (timestamp >= wanted_timestamp)
1710 if (timestamp <= wanted_timestamp)
1713 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1715 if (!(flags & AVSEEK_FLAG_ANY))
1716 while (m >= 0 && m < nb_entries &&
1717 !(entries[m].flags & AVINDEX_KEYFRAME))
1718 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1720 if (m == nb_entries)
1725 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1727 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1728 wanted_timestamp, flags);
1731 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1732 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1734 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1735 if (stream_index >= 0)
1736 ts = wrap_timestamp(s->streams[stream_index], ts);
1740 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1741 int64_t target_ts, int flags)
1743 AVInputFormat *avif = s->iformat;
1744 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1745 int64_t ts_min, ts_max, ts;
1750 if (stream_index < 0)
1753 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1756 ts_min = AV_NOPTS_VALUE;
1757 pos_limit = -1; // GCC falsely says it may be uninitialized.
1759 st = s->streams[stream_index];
1760 if (st->index_entries) {
1763 /* FIXME: Whole function must be checked for non-keyframe entries in
1764 * index case, especially read_timestamp(). */
1765 index = av_index_search_timestamp(st, target_ts,
1766 flags | AVSEEK_FLAG_BACKWARD);
1767 index = FFMAX(index, 0);
1768 e = &st->index_entries[index];
1770 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1772 ts_min = e->timestamp;
1773 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1774 pos_min, av_ts2str(ts_min));
1776 av_assert1(index == 0);
1779 index = av_index_search_timestamp(st, target_ts,
1780 flags & ~AVSEEK_FLAG_BACKWARD);
1781 av_assert0(index < st->nb_index_entries);
1783 e = &st->index_entries[index];
1784 av_assert1(e->timestamp >= target_ts);
1786 ts_max = e->timestamp;
1787 pos_limit = pos_max - e->min_distance;
1788 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1789 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1793 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1794 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1799 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1802 ff_read_frame_flush(s);
1803 ff_update_cur_dts(s, st, ts);
1808 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1809 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1811 int64_t step = 1024;
1812 int64_t limit, ts_max;
1813 int64_t filesize = avio_size(s->pb);
1814 int64_t pos_max = filesize - 1;
1817 pos_max = FFMAX(0, (pos_max) - step);
1818 ts_max = ff_read_timestamp(s, stream_index,
1819 &pos_max, limit, read_timestamp);
1821 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1822 if (ts_max == AV_NOPTS_VALUE)
1826 int64_t tmp_pos = pos_max + 1;
1827 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1828 &tmp_pos, INT64_MAX, read_timestamp);
1829 if (tmp_ts == AV_NOPTS_VALUE)
1831 av_assert0(tmp_pos > pos_max);
1834 if (tmp_pos >= filesize)
1846 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1847 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1848 int64_t ts_min, int64_t ts_max,
1849 int flags, int64_t *ts_ret,
1850 int64_t (*read_timestamp)(struct AVFormatContext *, int,
1851 int64_t *, int64_t))
1858 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1860 if (ts_min == AV_NOPTS_VALUE) {
1861 pos_min = s->data_offset;
1862 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1863 if (ts_min == AV_NOPTS_VALUE)
1867 if (ts_min >= target_ts) {
1872 if (ts_max == AV_NOPTS_VALUE) {
1873 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
1875 pos_limit = pos_max;
1878 if (ts_max <= target_ts) {
1883 if (ts_min > ts_max)
1885 else if (ts_min == ts_max)
1886 pos_limit = pos_min;
1889 while (pos_min < pos_limit) {
1891 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1892 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1893 assert(pos_limit <= pos_max);
1895 if (no_change == 0) {
1896 int64_t approximate_keyframe_distance = pos_max - pos_limit;
1897 // interpolate position (better than dichotomy)
1898 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
1900 pos_min - approximate_keyframe_distance;
1901 } else if (no_change == 1) {
1902 // bisection if interpolation did not change min / max pos last time
1903 pos = (pos_min + pos_limit) >> 1;
1905 /* linear search if bisection failed, can only happen if there
1906 * are very few or no keyframes between min/max */
1911 else if (pos > pos_limit)
1915 // May pass pos_limit instead of -1.
1916 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
1921 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
1922 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1923 pos_min, pos, pos_max,
1924 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1925 pos_limit, start_pos, no_change);
1926 if (ts == AV_NOPTS_VALUE) {
1927 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1930 if (target_ts <= ts) {
1931 pos_limit = start_pos - 1;
1935 if (target_ts >= ts) {
1941 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1942 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1945 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1947 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1948 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1949 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1955 static int seek_frame_byte(AVFormatContext *s, int stream_index,
1956 int64_t pos, int flags)
1958 int64_t pos_min, pos_max;
1960 pos_min = s->data_offset;
1961 pos_max = avio_size(s->pb) - 1;
1965 else if (pos > pos_max)
1968 avio_seek(s->pb, pos, SEEK_SET);
1970 s->io_repositioned = 1;
1975 static int seek_frame_generic(AVFormatContext *s, int stream_index,
1976 int64_t timestamp, int flags)
1983 st = s->streams[stream_index];
1985 index = av_index_search_timestamp(st, timestamp, flags);
1987 if (index < 0 && st->nb_index_entries &&
1988 timestamp < st->index_entries[0].timestamp)
1991 if (index < 0 || index == st->nb_index_entries - 1) {
1995 if (st->nb_index_entries) {
1996 av_assert0(st->index_entries);
1997 ie = &st->index_entries[st->nb_index_entries - 1];
1998 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2000 ff_update_cur_dts(s, st, ie->timestamp);
2002 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
2008 read_status = av_read_frame(s, &pkt);
2009 } while (read_status == AVERROR(EAGAIN));
2010 if (read_status < 0)
2012 av_free_packet(&pkt);
2013 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2014 if (pkt.flags & AV_PKT_FLAG_KEY)
2016 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2017 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);
2022 index = av_index_search_timestamp(st, timestamp, flags);
2027 ff_read_frame_flush(s);
2028 if (s->iformat->read_seek)
2029 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2031 ie = &st->index_entries[index];
2032 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2034 ff_update_cur_dts(s, st, ie->timestamp);
2039 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2040 int64_t timestamp, int flags)
2045 if (flags & AVSEEK_FLAG_BYTE) {
2046 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2048 ff_read_frame_flush(s);
2049 return seek_frame_byte(s, stream_index, timestamp, flags);
2052 if (stream_index < 0) {
2053 stream_index = av_find_default_stream_index(s);
2054 if (stream_index < 0)
2057 st = s->streams[stream_index];
2058 /* timestamp for default must be expressed in AV_TIME_BASE units */
2059 timestamp = av_rescale(timestamp, st->time_base.den,
2060 AV_TIME_BASE * (int64_t) st->time_base.num);
2063 /* first, we try the format specific seek */
2064 if (s->iformat->read_seek) {
2065 ff_read_frame_flush(s);
2066 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2072 if (s->iformat->read_timestamp &&
2073 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2074 ff_read_frame_flush(s);
2075 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2076 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2077 ff_read_frame_flush(s);
2078 return seek_frame_generic(s, stream_index, timestamp, flags);
2083 int av_seek_frame(AVFormatContext *s, int stream_index,
2084 int64_t timestamp, int flags)
2088 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2089 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2090 if ((flags & AVSEEK_FLAG_BACKWARD))
2094 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2095 flags & ~AVSEEK_FLAG_BACKWARD);
2098 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2101 ret = avformat_queue_attached_pictures(s);
2106 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2107 int64_t ts, int64_t max_ts, int flags)
2109 if (min_ts > ts || max_ts < ts)
2111 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2112 return AVERROR(EINVAL);
2115 flags |= AVSEEK_FLAG_ANY;
2116 flags &= ~AVSEEK_FLAG_BACKWARD;
2118 if (s->iformat->read_seek2) {
2120 ff_read_frame_flush(s);
2122 if (stream_index == -1 && s->nb_streams == 1) {
2123 AVRational time_base = s->streams[0]->time_base;
2124 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2125 min_ts = av_rescale_rnd(min_ts, time_base.den,
2126 time_base.num * (int64_t)AV_TIME_BASE,
2127 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2128 max_ts = av_rescale_rnd(max_ts, time_base.den,
2129 time_base.num * (int64_t)AV_TIME_BASE,
2130 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2133 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2137 ret = avformat_queue_attached_pictures(s);
2141 if (s->iformat->read_timestamp) {
2142 // try to seek via read_timestamp()
2145 // Fall back on old API if new is not implemented but old is.
2146 // Note the old API has somewhat different semantics.
2147 if (s->iformat->read_seek || 1) {
2148 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2149 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2150 if (ret<0 && ts != min_ts && max_ts != ts) {
2151 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2153 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2158 // try some generic seek like seek_frame_generic() but with new ts semantics
2159 return -1; //unreachable
2162 /*******************************************************/
2165 * Return TRUE if the stream has accurate duration in any stream.
2167 * @return TRUE if the stream has accurate duration for at least one component.
2169 static int has_duration(AVFormatContext *ic)
2174 for (i = 0; i < ic->nb_streams; i++) {
2175 st = ic->streams[i];
2176 if (st->duration != AV_NOPTS_VALUE)
2179 if (ic->duration != AV_NOPTS_VALUE)
2185 * Estimate the stream timings from the one of each components.
2187 * Also computes the global bitrate if possible.
2189 static void update_stream_timings(AVFormatContext *ic)
2191 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2192 int64_t duration, duration1, filesize;
2197 start_time = INT64_MAX;
2198 start_time_text = INT64_MAX;
2199 end_time = INT64_MIN;
2200 duration = INT64_MIN;
2201 for (i = 0; i < ic->nb_streams; i++) {
2202 st = ic->streams[i];
2203 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2204 start_time1 = av_rescale_q(st->start_time, st->time_base,
2206 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2207 if (start_time1 < start_time_text)
2208 start_time_text = start_time1;
2210 start_time = FFMIN(start_time, start_time1);
2211 end_time1 = AV_NOPTS_VALUE;
2212 if (st->duration != AV_NOPTS_VALUE) {
2213 end_time1 = start_time1 +
2214 av_rescale_q(st->duration, st->time_base,
2216 end_time = FFMAX(end_time, end_time1);
2218 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2219 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2220 p->start_time = start_time1;
2221 if (p->end_time < end_time1)
2222 p->end_time = end_time1;
2225 if (st->duration != AV_NOPTS_VALUE) {
2226 duration1 = av_rescale_q(st->duration, st->time_base,
2228 duration = FFMAX(duration, duration1);
2231 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2232 start_time = start_time_text;
2233 else if (start_time > start_time_text)
2234 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2236 if (start_time != INT64_MAX) {
2237 ic->start_time = start_time;
2238 if (end_time != INT64_MIN) {
2239 if (ic->nb_programs) {
2240 for (i = 0; i < ic->nb_programs; i++) {
2241 p = ic->programs[i];
2242 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2243 duration = FFMAX(duration, p->end_time - p->start_time);
2246 duration = FFMAX(duration, end_time - start_time);
2249 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2250 ic->duration = duration;
2252 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2253 /* compute the bitrate */
2254 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2255 (double) ic->duration;
2256 if (bitrate >= 0 && bitrate <= INT_MAX)
2257 ic->bit_rate = bitrate;
2261 static void fill_all_stream_timings(AVFormatContext *ic)
2266 update_stream_timings(ic);
2267 for (i = 0; i < ic->nb_streams; i++) {
2268 st = ic->streams[i];
2269 if (st->start_time == AV_NOPTS_VALUE) {
2270 if (ic->start_time != AV_NOPTS_VALUE)
2271 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2273 if (ic->duration != AV_NOPTS_VALUE)
2274 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2280 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2282 int64_t filesize, duration;
2283 int i, show_warning = 0;
2286 /* if bit_rate is already set, we believe it */
2287 if (ic->bit_rate <= 0) {
2289 for (i = 0; i < ic->nb_streams; i++) {
2290 st = ic->streams[i];
2291 if (st->codec->bit_rate > 0) {
2292 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2296 bit_rate += st->codec->bit_rate;
2299 ic->bit_rate = bit_rate;
2302 /* if duration is already set, we believe it */
2303 if (ic->duration == AV_NOPTS_VALUE &&
2304 ic->bit_rate != 0) {
2305 filesize = ic->pb ? avio_size(ic->pb) : 0;
2306 if (filesize > ic->data_offset) {
2307 filesize -= ic->data_offset;
2308 for (i = 0; i < ic->nb_streams; i++) {
2309 st = ic->streams[i];
2310 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2311 && st->duration == AV_NOPTS_VALUE) {
2312 duration = av_rescale(8 * filesize, st->time_base.den,
2314 (int64_t) st->time_base.num);
2315 st->duration = duration;
2322 av_log(ic, AV_LOG_WARNING,
2323 "Estimating duration from bitrate, this may be inaccurate\n");
2326 #define DURATION_MAX_READ_SIZE 250000LL
2327 #define DURATION_MAX_RETRY 4
2329 /* only usable for MPEG-PS streams */
2330 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2332 AVPacket pkt1, *pkt = &pkt1;
2334 int num, den, read_size, i, ret;
2335 int found_duration = 0;
2337 int64_t filesize, offset, duration;
2340 /* flush packet queue */
2341 flush_packet_queue(ic);
2343 for (i = 0; i < ic->nb_streams; i++) {
2344 st = ic->streams[i];
2345 if (st->start_time == AV_NOPTS_VALUE &&
2346 st->first_dts == AV_NOPTS_VALUE &&
2347 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2348 av_log(st->codec, AV_LOG_WARNING,
2349 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2352 av_parser_close(st->parser);
2357 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2358 /* estimate the end time (duration) */
2359 /* XXX: may need to support wrapping */
2360 filesize = ic->pb ? avio_size(ic->pb) : 0;
2362 is_end = found_duration;
2363 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2367 avio_seek(ic->pb, offset, SEEK_SET);
2370 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2374 ret = ff_read_packet(ic, pkt);
2375 } while (ret == AVERROR(EAGAIN));
2378 read_size += pkt->size;
2379 st = ic->streams[pkt->stream_index];
2380 if (pkt->pts != AV_NOPTS_VALUE &&
2381 (st->start_time != AV_NOPTS_VALUE ||
2382 st->first_dts != AV_NOPTS_VALUE)) {
2383 if (pkt->duration == 0) {
2384 ff_compute_frame_duration(&num, &den, st, st->parser, pkt);
2386 pkt->duration = av_rescale_rnd(1,
2387 num * (int64_t) st->time_base.den,
2388 den * (int64_t) st->time_base.num,
2392 duration = pkt->pts + pkt->duration;
2394 if (st->start_time != AV_NOPTS_VALUE)
2395 duration -= st->start_time;
2397 duration -= st->first_dts;
2399 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2400 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2401 st->duration = duration;
2402 st->info->last_duration = duration;
2405 av_free_packet(pkt);
2408 /* check if all audio/video streams have valid duration */
2411 for (i = 0; i < ic->nb_streams; i++) {
2412 st = ic->streams[i];
2413 switch (st->codec->codec_type) {
2414 case AVMEDIA_TYPE_VIDEO:
2415 case AVMEDIA_TYPE_AUDIO:
2416 if (st->duration == AV_NOPTS_VALUE)
2423 ++retry <= DURATION_MAX_RETRY);
2425 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2427 /* warn about audio/video streams which duration could not be estimated */
2428 for (i = 0; i < ic->nb_streams; i++) {
2429 st = ic->streams[i];
2430 if (st->duration == AV_NOPTS_VALUE) {
2431 switch (st->codec->codec_type) {
2432 case AVMEDIA_TYPE_VIDEO:
2433 case AVMEDIA_TYPE_AUDIO:
2434 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2435 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2437 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2441 fill_all_stream_timings(ic);
2443 avio_seek(ic->pb, old_offset, SEEK_SET);
2444 for (i = 0; i < ic->nb_streams; i++) {
2447 st = ic->streams[i];
2448 st->cur_dts = st->first_dts;
2449 st->last_IP_pts = AV_NOPTS_VALUE;
2450 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2451 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2452 st->pts_buffer[j] = AV_NOPTS_VALUE;
2456 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2460 /* get the file size, if possible */
2461 if (ic->iformat->flags & AVFMT_NOFILE) {
2464 file_size = avio_size(ic->pb);
2465 file_size = FFMAX(0, file_size);
2468 if ((!strcmp(ic->iformat->name, "mpeg") ||
2469 !strcmp(ic->iformat->name, "mpegts")) &&
2470 file_size && ic->pb->seekable) {
2471 /* get accurate estimate from the PTSes */
2472 estimate_timings_from_pts(ic, old_offset);
2473 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2474 } else if (has_duration(ic)) {
2475 /* at least one component has timings - we use them for all
2477 fill_all_stream_timings(ic);
2478 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2480 /* less precise: use bitrate info */
2481 estimate_timings_from_bit_rate(ic);
2482 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2484 update_stream_timings(ic);
2488 AVStream av_unused *st;
2489 for (i = 0; i < ic->nb_streams; i++) {
2490 st = ic->streams[i];
2491 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2492 (double) st->start_time / AV_TIME_BASE,
2493 (double) st->duration / AV_TIME_BASE);
2496 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2497 (double) ic->start_time / AV_TIME_BASE,
2498 (double) ic->duration / AV_TIME_BASE,
2499 ic->bit_rate / 1000);
2503 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2505 AVCodecContext *avctx = st->codec;
2507 #define FAIL(errmsg) do { \
2509 *errmsg_ptr = errmsg; \
2513 if ( avctx->codec_id == AV_CODEC_ID_NONE
2514 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2515 FAIL("unknown codec");
2516 switch (avctx->codec_type) {
2517 case AVMEDIA_TYPE_AUDIO:
2518 if (!avctx->frame_size && determinable_frame_size(avctx))
2519 FAIL("unspecified frame size");
2520 if (st->info->found_decoder >= 0 &&
2521 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2522 FAIL("unspecified sample format");
2523 if (!avctx->sample_rate)
2524 FAIL("unspecified sample rate");
2525 if (!avctx->channels)
2526 FAIL("unspecified number of channels");
2527 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2528 FAIL("no decodable DTS frames");
2530 case AVMEDIA_TYPE_VIDEO:
2532 FAIL("unspecified size");
2533 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2534 FAIL("unspecified pixel format");
2535 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2536 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2537 FAIL("no frame in rv30/40 and no sar");
2539 case AVMEDIA_TYPE_SUBTITLE:
2540 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2541 FAIL("unspecified size");
2543 case AVMEDIA_TYPE_DATA:
2544 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2550 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2551 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2552 AVDictionary **options)
2554 const AVCodec *codec;
2555 int got_picture = 1, ret = 0;
2556 AVFrame *frame = av_frame_alloc();
2557 AVSubtitle subtitle;
2558 AVPacket pkt = *avpkt;
2561 return AVERROR(ENOMEM);
2563 if (!avcodec_is_open(st->codec) &&
2564 st->info->found_decoder <= 0 &&
2565 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2566 AVDictionary *thread_opt = NULL;
2568 codec = find_decoder(s, st, st->codec->codec_id);
2571 st->info->found_decoder = -st->codec->codec_id;
2576 /* Force thread count to 1 since the H.264 decoder will not extract
2577 * SPS and PPS to extradata during multi-threaded decoding. */
2578 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2579 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2581 av_dict_free(&thread_opt);
2583 st->info->found_decoder = -st->codec->codec_id;
2586 st->info->found_decoder = 1;
2587 } else if (!st->info->found_decoder)
2588 st->info->found_decoder = 1;
2590 if (st->info->found_decoder < 0) {
2595 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2597 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2598 (!st->codec_info_nb_frames &&
2599 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2601 switch (st->codec->codec_type) {
2602 case AVMEDIA_TYPE_VIDEO:
2603 ret = avcodec_decode_video2(st->codec, frame,
2604 &got_picture, &pkt);
2606 case AVMEDIA_TYPE_AUDIO:
2607 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2609 case AVMEDIA_TYPE_SUBTITLE:
2610 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2611 &got_picture, &pkt);
2619 st->nb_decoded_frames++;
2626 if (!pkt.data && !got_picture)
2630 av_frame_free(&frame);
2634 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2636 while (tags->id != AV_CODEC_ID_NONE) {
2644 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2647 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2648 if (tag == tags[i].tag)
2650 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2651 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2653 return AV_CODEC_ID_NONE;
2656 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2661 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2663 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2665 return AV_CODEC_ID_NONE;
2670 if (sflags & (1 << (bps - 1))) {
2673 return AV_CODEC_ID_PCM_S8;
2675 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2677 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2679 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2681 return AV_CODEC_ID_NONE;
2686 return AV_CODEC_ID_PCM_U8;
2688 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2690 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2692 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2694 return AV_CODEC_ID_NONE;
2700 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2703 if (!av_codec_get_tag2(tags, id, &tag))
2708 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2712 for (i = 0; tags && tags[i]; i++) {
2713 const AVCodecTag *codec_tags = tags[i];
2714 while (codec_tags->id != AV_CODEC_ID_NONE) {
2715 if (codec_tags->id == id) {
2716 *tag = codec_tags->tag;
2725 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2728 for (i = 0; tags && tags[i]; i++) {
2729 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2730 if (id != AV_CODEC_ID_NONE)
2733 return AV_CODEC_ID_NONE;
2736 static void compute_chapters_end(AVFormatContext *s)
2739 int64_t max_time = s->duration +
2740 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2742 for (i = 0; i < s->nb_chapters; i++)
2743 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2744 AVChapter *ch = s->chapters[i];
2745 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2749 for (j = 0; j < s->nb_chapters; j++) {
2750 AVChapter *ch1 = s->chapters[j];
2751 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2753 if (j != i && next_start > ch->start && next_start < end)
2756 ch->end = (end == INT64_MAX) ? ch->start : end;
2760 static int get_std_framerate(int i)
2763 return (i + 1) * 1001;
2765 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12;
2768 /* Is the time base unreliable?
2769 * This is a heuristic to balance between quick acceptance of the values in
2770 * the headers vs. some extra checks.
2771 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2772 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2773 * And there are "variable" fps files this needs to detect as well. */
2774 static int tb_unreliable(AVCodecContext *c)
2776 if (c->time_base.den >= 101L * c->time_base.num ||
2777 c->time_base.den < 5L * c->time_base.num ||
2778 // c->codec_tag == AV_RL32("DIVX") ||
2779 // c->codec_tag == AV_RL32("XVID") ||
2780 c->codec_tag == AV_RL32("mp4v") ||
2781 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2782 c->codec_id == AV_CODEC_ID_GIF ||
2783 c->codec_id == AV_CODEC_ID_H264)
2788 #if FF_API_FORMAT_PARAMETERS
2789 int av_find_stream_info(AVFormatContext *ic)
2791 return avformat_find_stream_info(ic, NULL);
2795 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2799 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2800 avctx->extradata_size = 0;
2801 return AVERROR(EINVAL);
2803 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2804 if (avctx->extradata) {
2805 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2806 avctx->extradata_size = size;
2809 avctx->extradata_size = 0;
2810 ret = AVERROR(ENOMEM);
2815 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
2817 int ret = ff_alloc_extradata(avctx, size);
2820 ret = avio_read(pb, avctx->extradata, size);
2822 av_freep(&avctx->extradata);
2823 avctx->extradata_size = 0;
2824 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
2825 return ret < 0 ? ret : AVERROR_INVALIDDATA;
2831 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
2834 int64_t last = st->info->last_dts;
2836 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
2837 && ts - (uint64_t)last < INT64_MAX) {
2838 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
2839 int64_t duration = ts - last;
2841 if (!st->info->duration_error)
2842 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2843 if (!st->info->duration_error)
2844 return AVERROR(ENOMEM);
2846 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2847 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2848 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2849 if (st->info->duration_error[0][1][i] < 1e10) {
2850 int framerate = get_std_framerate(i);
2851 double sdts = dts*framerate/(1001*12);
2852 for (j= 0; j<2; j++) {
2853 int64_t ticks = llrint(sdts+j*0.5);
2854 double error= sdts - ticks + j*0.5;
2855 st->info->duration_error[j][0][i] += error;
2856 st->info->duration_error[j][1][i] += error*error;
2860 st->info->duration_count++;
2861 st->info->rfps_duration_sum += duration;
2863 if (st->info->duration_count % 10 == 0) {
2864 int n = st->info->duration_count;
2865 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2866 if (st->info->duration_error[0][1][i] < 1e10) {
2867 double a0 = st->info->duration_error[0][0][i] / n;
2868 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
2869 double a1 = st->info->duration_error[1][0][i] / n;
2870 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
2871 if (error0 > 0.04 && error1 > 0.04) {
2872 st->info->duration_error[0][1][i] = 2e10;
2873 st->info->duration_error[1][1][i] = 2e10;
2879 // ignore the first 4 values, they might have some random jitter
2880 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
2881 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2883 if (ts != AV_NOPTS_VALUE)
2884 st->info->last_dts = ts;
2889 void ff_rfps_calculate(AVFormatContext *ic)
2893 for (i = 0; i < ic->nb_streams; i++) {
2894 AVStream *st = ic->streams[i];
2896 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
2898 // the check for tb_unreliable() is not completely correct, since this is not about handling
2899 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2900 // ipmovie.c produces.
2901 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)
2902 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);
2903 if (st->info->duration_count>1 && !st->r_frame_rate.num
2904 && tb_unreliable(st->codec)) {
2906 double best_error= 0.01;
2907 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
2909 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
2912 if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2914 if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2917 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
2920 for (k= 0; k<2; k++) {
2921 int n = st->info->duration_count;
2922 double a= st->info->duration_error[k][0][j] / n;
2923 double error= st->info->duration_error[k][1][j]/n - a*a;
2925 if (error < best_error && best_error> 0.000000001) {
2927 num = get_std_framerate(j);
2930 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2933 // do not increase frame rate by more than 1 % in order to match a standard rate.
2934 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
2935 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2937 if ( !st->avg_frame_rate.num
2938 && st->r_frame_rate.num && st->info->rfps_duration_sum
2939 && st->info->codec_info_duration <= 0
2940 && st->info->duration_count > 2
2941 && 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
2943 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
2944 st->avg_frame_rate = st->r_frame_rate;
2947 av_freep(&st->info->duration_error);
2948 st->info->last_dts = AV_NOPTS_VALUE;
2949 st->info->duration_count = 0;
2950 st->info->rfps_duration_sum = 0;
2954 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2956 int i, count, ret = 0, j;
2959 AVPacket pkt1, *pkt;
2960 int64_t old_offset = avio_tell(ic->pb);
2961 // new streams might appear, no options for those
2962 int orig_nb_streams = ic->nb_streams;
2964 int64_t max_analyze_duration = ic->max_analyze_duration2;
2965 int64_t probesize = ic->probesize2;
2967 if (!max_analyze_duration)
2968 max_analyze_duration = ic->max_analyze_duration;
2970 probesize = ic->probesize;
2971 flush_codecs = probesize > 0;
2973 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
2975 if (!max_analyze_duration) {
2976 if (!strcmp(ic->iformat->name, "flv") && !(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2977 max_analyze_duration = 10*AV_TIME_BASE;
2979 max_analyze_duration = 5*AV_TIME_BASE;
2983 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
2984 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
2986 for (i = 0; i < ic->nb_streams; i++) {
2987 const AVCodec *codec;
2988 AVDictionary *thread_opt = NULL;
2989 st = ic->streams[i];
2991 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2992 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2993 /* if (!st->time_base.num)
2995 if (!st->codec->time_base.num)
2996 st->codec->time_base = st->time_base;
2998 // only for the split stuff
2999 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
3000 st->parser = av_parser_init(st->codec->codec_id);
3002 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3003 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3004 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3005 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3007 } else if (st->need_parsing) {
3008 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3009 "%s, packets or times may be invalid.\n",
3010 avcodec_get_name(st->codec->codec_id));
3013 codec = find_decoder(ic, st, st->codec->codec_id);
3015 /* Force thread count to 1 since the H.264 decoder will not extract
3016 * SPS and PPS to extradata during multi-threaded decoding. */
3017 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3019 /* Ensure that subtitle_header is properly set. */
3020 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3021 && codec && !st->codec->codec) {
3022 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3023 av_log(ic, AV_LOG_WARNING,
3024 "Failed to open codec in av_find_stream_info\n");
3027 // Try to just open decoders, in case this is enough to get parameters.
3028 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3029 if (codec && !st->codec->codec)
3030 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3031 av_log(ic, AV_LOG_WARNING,
3032 "Failed to open codec in av_find_stream_info\n");
3035 av_dict_free(&thread_opt);
3038 for (i = 0; i < ic->nb_streams; i++) {
3039 #if FF_API_R_FRAME_RATE
3040 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3042 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3043 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3049 if (ff_check_interrupt(&ic->interrupt_callback)) {
3051 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3055 /* check if one codec still needs to be handled */
3056 for (i = 0; i < ic->nb_streams; i++) {
3057 int fps_analyze_framecount = 20;
3059 st = ic->streams[i];
3060 if (!has_codec_parameters(st, NULL))
3062 /* If the timebase is coarse (like the usual millisecond precision
3063 * of mkv), we need to analyze more frames to reliably arrive at
3064 * the correct fps. */
3065 if (av_q2d(st->time_base) > 0.0005)
3066 fps_analyze_framecount *= 2;
3067 if (!tb_unreliable(st->codec))
3068 fps_analyze_framecount = 0;
3069 if (ic->fps_probe_size >= 0)
3070 fps_analyze_framecount = ic->fps_probe_size;
3071 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3072 fps_analyze_framecount = 0;
3073 /* variable fps and no guess at the real fps */
3074 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3075 st->info->duration_count < fps_analyze_framecount &&
3076 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3078 if (st->parser && st->parser->parser->split &&
3079 !st->codec->extradata)
3081 if (st->first_dts == AV_NOPTS_VALUE &&
3082 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3083 st->codec_info_nb_frames < ic->max_ts_probe &&
3084 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3085 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3088 if (i == ic->nb_streams) {
3089 /* NOTE: If the format has no header, then we need to read some
3090 * packets to get most of the streams, so we cannot stop here. */
3091 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3092 /* If we found the info for all the codecs, we can stop. */
3094 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3099 /* We did not get all the codec info, but we read too much data. */
3100 if (read_size >= probesize) {
3102 av_log(ic, AV_LOG_DEBUG,
3103 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3104 for (i = 0; i < ic->nb_streams; i++)
3105 if (!ic->streams[i]->r_frame_rate.num &&
3106 ic->streams[i]->info->duration_count <= 1 &&
3107 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3108 strcmp(ic->iformat->name, "image2"))
3109 av_log(ic, AV_LOG_WARNING,
3110 "Stream #%d: not enough frames to estimate rate; "
3111 "consider increasing probesize\n", i);
3115 /* NOTE: A new stream can be added there if no header in file
3116 * (AVFMTCTX_NOHEADER). */
3117 ret = read_frame_internal(ic, &pkt1);
3118 if (ret == AVERROR(EAGAIN))
3126 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3127 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3129 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3130 &ic->packet_buffer_end);
3132 ret = AVERROR(ENOMEM);
3133 goto find_stream_info_err;
3135 if ((ret = av_dup_packet(pkt)) < 0)
3136 goto find_stream_info_err;
3139 st = ic->streams[pkt->stream_index];
3140 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3141 read_size += pkt->size;
3143 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3144 /* check for non-increasing dts */
3145 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3146 st->info->fps_last_dts >= pkt->dts) {
3147 av_log(ic, AV_LOG_DEBUG,
3148 "Non-increasing DTS in stream %d: packet %d with DTS "
3149 "%"PRId64", packet %d with DTS %"PRId64"\n",
3150 st->index, st->info->fps_last_dts_idx,
3151 st->info->fps_last_dts, st->codec_info_nb_frames,
3153 st->info->fps_first_dts =
3154 st->info->fps_last_dts = AV_NOPTS_VALUE;
3156 /* Check for a discontinuity in dts. If the difference in dts
3157 * is more than 1000 times the average packet duration in the
3158 * sequence, we treat it as a discontinuity. */
3159 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3160 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3161 (pkt->dts - st->info->fps_last_dts) / 1000 >
3162 (st->info->fps_last_dts - st->info->fps_first_dts) /
3163 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3164 av_log(ic, AV_LOG_WARNING,
3165 "DTS discontinuity in stream %d: packet %d with DTS "
3166 "%"PRId64", packet %d with DTS %"PRId64"\n",
3167 st->index, st->info->fps_last_dts_idx,
3168 st->info->fps_last_dts, st->codec_info_nb_frames,
3170 st->info->fps_first_dts =
3171 st->info->fps_last_dts = AV_NOPTS_VALUE;
3174 /* update stored dts values */
3175 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3176 st->info->fps_first_dts = pkt->dts;
3177 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3179 st->info->fps_last_dts = pkt->dts;
3180 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3182 if (st->codec_info_nb_frames>1) {
3185 if (st->time_base.den > 0)
3186 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3187 if (st->avg_frame_rate.num > 0)
3188 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3191 && st->codec_info_nb_frames>30
3192 && st->info->fps_first_dts != AV_NOPTS_VALUE
3193 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3194 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3196 if (t >= max_analyze_duration) {
3197 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n",
3198 max_analyze_duration,
3202 if (pkt->duration) {
3203 st->info->codec_info_duration += pkt->duration;
3204 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3207 #if FF_API_R_FRAME_RATE
3208 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3209 ff_rfps_add_frame(ic, st, pkt->dts);
3211 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3212 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3213 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3214 if (ff_alloc_extradata(st->codec, i))
3215 return AVERROR(ENOMEM);
3216 memcpy(st->codec->extradata, pkt->data,
3217 st->codec->extradata_size);
3221 /* If still no information, we try to open the codec and to
3222 * decompress the frame. We try to avoid that in most cases as
3223 * it takes longer and uses more memory. For MPEG-4, we need to
3224 * decompress for QuickTime.
3226 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3227 * least one frame of codec data, this makes sure the codec initializes
3228 * the channel configuration and does not only trust the values from
3230 try_decode_frame(ic, st, pkt,
3231 (options && i < orig_nb_streams) ? &options[i] : NULL);
3233 st->codec_info_nb_frames++;
3238 AVPacket empty_pkt = { 0 };
3240 av_init_packet(&empty_pkt);
3242 for (i = 0; i < ic->nb_streams; i++) {
3244 st = ic->streams[i];
3246 /* flush the decoders */
3247 if (st->info->found_decoder == 1) {
3249 err = try_decode_frame(ic, st, &empty_pkt,
3250 (options && i < orig_nb_streams)
3251 ? &options[i] : NULL);
3252 } while (err > 0 && !has_codec_parameters(st, NULL));
3255 av_log(ic, AV_LOG_INFO,
3256 "decoding for stream %d failed\n", st->index);
3261 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
3263 // close codecs which were opened in try_decode_frame()
3264 for (i = 0; i < ic->nb_streams; i++) {
3265 st = ic->streams[i];
3266 avcodec_close(st->codec);
3269 ff_rfps_calculate(ic);
3271 for (i = 0; i < ic->nb_streams; i++) {
3272 st = ic->streams[i];
3273 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3274 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3275 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3276 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt)
3277 st->codec->codec_tag= tag;
3280 /* estimate average framerate if not set by demuxer */
3281 if (st->info->codec_info_duration_fields &&
3282 !st->avg_frame_rate.num &&
3283 st->info->codec_info_duration) {
3285 double best_error = 0.01;
3287 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3288 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3289 st->info->codec_info_duration < 0)
3291 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3292 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3293 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3295 /* Round guessed framerate to a "standard" framerate if it's
3296 * within 1% of the original estimate. */
3297 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3298 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3299 double error = fabs(av_q2d(st->avg_frame_rate) /
3300 av_q2d(std_fps) - 1);
3302 if (error < best_error) {
3304 best_fps = std_fps.num;
3308 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3309 best_fps, 12 * 1001, INT_MAX);
3312 if (!st->r_frame_rate.num) {
3313 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3314 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3315 st->r_frame_rate.num = st->codec->time_base.den;
3316 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3318 st->r_frame_rate.num = st->time_base.den;
3319 st->r_frame_rate.den = st->time_base.num;
3322 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3323 if (!st->codec->bits_per_coded_sample)
3324 st->codec->bits_per_coded_sample =
3325 av_get_bits_per_sample(st->codec->codec_id);
3326 // set stream disposition based on audio service type
3327 switch (st->codec->audio_service_type) {
3328 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3329 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3331 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3332 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3334 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3335 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3337 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3338 st->disposition = AV_DISPOSITION_COMMENT;
3340 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3341 st->disposition = AV_DISPOSITION_KARAOKE;
3348 estimate_timings(ic, old_offset);
3350 if (ret >= 0 && ic->nb_streams)
3351 /* We could not have all the codec parameters before EOF. */
3353 for (i = 0; i < ic->nb_streams; i++) {
3355 st = ic->streams[i];
3356 if (!has_codec_parameters(st, &errmsg)) {
3358 avcodec_string(buf, sizeof(buf), st->codec, 0);
3359 av_log(ic, AV_LOG_WARNING,
3360 "Could not find codec parameters for stream %d (%s): %s\n"
3361 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3368 compute_chapters_end(ic);
3370 find_stream_info_err:
3371 for (i = 0; i < ic->nb_streams; i++) {
3372 st = ic->streams[i];
3373 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3374 ic->streams[i]->codec->thread_count = 0;
3376 av_freep(&st->info->duration_error);
3377 av_freep(&ic->streams[i]->info);
3380 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3381 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3385 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3389 for (i = 0; i < ic->nb_programs; i++) {
3390 if (ic->programs[i] == last) {
3394 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3395 if (ic->programs[i]->stream_index[j] == s)
3396 return ic->programs[i];
3402 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3403 int wanted_stream_nb, int related_stream,
3404 AVCodec **decoder_ret, int flags)
3406 int i, nb_streams = ic->nb_streams;
3407 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3408 unsigned *program = NULL;
3409 const AVCodec *decoder = NULL, *best_decoder = NULL;
3411 if (related_stream >= 0 && wanted_stream_nb < 0) {
3412 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3414 program = p->stream_index;
3415 nb_streams = p->nb_stream_indexes;
3418 for (i = 0; i < nb_streams; i++) {
3419 int real_stream_index = program ? program[i] : i;
3420 AVStream *st = ic->streams[real_stream_index];
3421 AVCodecContext *avctx = st->codec;
3422 if (avctx->codec_type != type)
3424 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3426 if (wanted_stream_nb != real_stream_index &&
3427 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3428 AV_DISPOSITION_VISUAL_IMPAIRED))
3430 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3433 decoder = find_decoder(ic, st, st->codec->codec_id);
3436 ret = AVERROR_DECODER_NOT_FOUND;
3440 count = st->codec_info_nb_frames;
3441 bitrate = avctx->bit_rate;
3443 bitrate = avctx->rc_max_rate;
3444 multiframe = FFMIN(5, count);
3445 if ((best_multiframe > multiframe) ||
3446 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3447 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3450 best_bitrate = bitrate;
3451 best_multiframe = multiframe;
3452 ret = real_stream_index;
3453 best_decoder = decoder;
3454 if (program && i == nb_streams - 1 && ret < 0) {
3456 nb_streams = ic->nb_streams;
3457 /* no related stream found, try again with everything */
3462 *decoder_ret = (AVCodec*)best_decoder;
3466 /*******************************************************/
3468 int av_read_play(AVFormatContext *s)
3470 if (s->iformat->read_play)
3471 return s->iformat->read_play(s);
3473 return avio_pause(s->pb, 0);
3474 return AVERROR(ENOSYS);
3477 int av_read_pause(AVFormatContext *s)
3479 if (s->iformat->read_pause)
3480 return s->iformat->read_pause(s);
3482 return avio_pause(s->pb, 1);
3483 return AVERROR(ENOSYS);
3486 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3488 av_assert0(s->nb_streams>0);
3489 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3491 for (j = 0; j < st->nb_side_data; j++)
3492 av_freep(&st->side_data[j].data);
3493 av_freep(&st->side_data);
3494 st->nb_side_data = 0;
3497 av_parser_close(st->parser);
3499 if (st->attached_pic.data)
3500 av_free_packet(&st->attached_pic);
3501 av_dict_free(&st->metadata);
3502 av_freep(&st->probe_data.buf);
3503 av_freep(&st->index_entries);
3504 av_freep(&st->codec->extradata);
3505 av_freep(&st->codec->subtitle_header);
3506 av_freep(&st->codec);
3507 av_freep(&st->priv_data);
3509 av_freep(&st->info->duration_error);
3510 av_freep(&st->info);
3511 av_freep(&s->streams[ --s->nb_streams ]);
3514 void avformat_free_context(AVFormatContext *s)
3522 if (s->iformat && s->iformat->priv_class && s->priv_data)
3523 av_opt_free(s->priv_data);
3524 if (s->oformat && s->oformat->priv_class && s->priv_data)
3525 av_opt_free(s->priv_data);
3527 for (i = s->nb_streams - 1; i >= 0; i--) {
3528 ff_free_stream(s, s->streams[i]);
3530 for (i = s->nb_programs - 1; i >= 0; i--) {
3531 av_dict_free(&s->programs[i]->metadata);
3532 av_freep(&s->programs[i]->stream_index);
3533 av_freep(&s->programs[i]);
3535 av_freep(&s->programs);
3536 av_freep(&s->priv_data);
3537 while (s->nb_chapters--) {
3538 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3539 av_freep(&s->chapters[s->nb_chapters]);
3541 av_freep(&s->chapters);
3542 av_dict_free(&s->metadata);
3543 av_freep(&s->streams);
3544 av_freep(&s->internal);
3545 flush_packet_queue(s);
3549 #if FF_API_CLOSE_INPUT_FILE
3550 void av_close_input_file(AVFormatContext *s)
3552 avformat_close_input(&s);
3556 void avformat_close_input(AVFormatContext **ps)
3567 if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) ||
3568 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3571 flush_packet_queue(s);
3574 if (s->iformat->read_close)
3575 s->iformat->read_close(s);
3577 avformat_free_context(s);
3584 #if FF_API_NEW_STREAM
3585 AVStream *av_new_stream(AVFormatContext *s, int id)
3587 AVStream *st = avformat_new_stream(s, NULL);
3594 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3600 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3602 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3605 s->streams = streams;
3607 st = av_mallocz(sizeof(AVStream));
3610 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3614 st->info->last_dts = AV_NOPTS_VALUE;
3616 st->codec = avcodec_alloc_context3(c);
3618 /* no default bitrate if decoding */
3619 st->codec->bit_rate = 0;
3621 /* default pts setting is MPEG-like */
3622 avpriv_set_pts_info(st, 33, 1, 90000);
3625 st->index = s->nb_streams;
3626 st->start_time = AV_NOPTS_VALUE;
3627 st->duration = AV_NOPTS_VALUE;
3628 /* we set the current DTS to 0 so that formats without any timestamps
3629 * but durations get some timestamps, formats with some unknown
3630 * timestamps have their first few packets buffered and the
3631 * timestamps corrected before they are returned to the user */
3632 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3633 st->first_dts = AV_NOPTS_VALUE;
3634 st->probe_packets = MAX_PROBE_PACKETS;
3635 st->pts_wrap_reference = AV_NOPTS_VALUE;
3636 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3638 st->last_IP_pts = AV_NOPTS_VALUE;
3639 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3640 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3641 st->pts_buffer[i] = AV_NOPTS_VALUE;
3643 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3645 #if FF_API_R_FRAME_RATE
3646 st->info->last_dts = AV_NOPTS_VALUE;
3648 st->info->fps_first_dts = AV_NOPTS_VALUE;
3649 st->info->fps_last_dts = AV_NOPTS_VALUE;
3651 st->inject_global_side_data = s->internal->inject_global_side_data;
3653 s->streams[s->nb_streams++] = st;
3657 AVProgram *av_new_program(AVFormatContext *ac, int id)
3659 AVProgram *program = NULL;
3662 av_dlog(ac, "new_program: id=0x%04x\n", id);
3664 for (i = 0; i < ac->nb_programs; i++)
3665 if (ac->programs[i]->id == id)
3666 program = ac->programs[i];
3669 program = av_mallocz(sizeof(AVProgram));
3672 dynarray_add(&ac->programs, &ac->nb_programs, program);
3673 program->discard = AVDISCARD_NONE;
3676 program->pts_wrap_reference = AV_NOPTS_VALUE;
3677 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3679 program->start_time =
3680 program->end_time = AV_NOPTS_VALUE;
3685 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3686 int64_t start, int64_t end, const char *title)
3688 AVChapter *chapter = NULL;
3691 if (end != AV_NOPTS_VALUE && start > end) {
3692 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
3696 for (i = 0; i < s->nb_chapters; i++)
3697 if (s->chapters[i]->id == id)
3698 chapter = s->chapters[i];
3701 chapter = av_mallocz(sizeof(AVChapter));
3704 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3706 av_dict_set(&chapter->metadata, "title", title, 0);
3708 chapter->time_base = time_base;
3709 chapter->start = start;
3715 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3718 AVProgram *program = NULL;
3721 if (idx >= ac->nb_streams) {
3722 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3726 for (i = 0; i < ac->nb_programs; i++) {
3727 if (ac->programs[i]->id != progid)
3729 program = ac->programs[i];
3730 for (j = 0; j < program->nb_stream_indexes; j++)
3731 if (program->stream_index[j] == idx)
3734 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3737 program->stream_index = tmp;
3738 program->stream_index[program->nb_stream_indexes++] = idx;
3743 uint64_t ff_ntp_time(void)
3745 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3748 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3751 char *q, buf1[20], c;
3752 int nd, len, percentd_found;
3764 while (av_isdigit(*p))
3765 nd = nd * 10 + *p++ - '0';
3767 } while (av_isdigit(c));
3776 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3778 if ((q - buf + len) > buf_size - 1)
3780 memcpy(q, buf1, len);
3788 if ((q - buf) < buf_size - 1)
3792 if (!percentd_found)
3801 void av_url_split(char *proto, int proto_size,
3802 char *authorization, int authorization_size,
3803 char *hostname, int hostname_size,
3804 int *port_ptr, char *path, int path_size, const char *url)
3806 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3812 if (authorization_size > 0)
3813 authorization[0] = 0;
3814 if (hostname_size > 0)
3819 /* parse protocol */
3820 if ((p = strchr(url, ':'))) {
3821 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3828 /* no protocol means plain filename */
3829 av_strlcpy(path, url, path_size);
3833 /* separate path from hostname */
3834 ls = strchr(p, '/');
3835 ls2 = strchr(p, '?');
3839 ls = FFMIN(ls, ls2);
3841 av_strlcpy(path, ls, path_size);
3843 ls = &p[strlen(p)]; // XXX
3845 /* the rest is hostname, use that to parse auth/port */
3847 /* authorization (user[:pass]@hostname) */
3849 while ((at = strchr(p, '@')) && at < ls) {
3850 av_strlcpy(authorization, at2,
3851 FFMIN(authorization_size, at + 1 - at2));
3852 p = at + 1; /* skip '@' */
3855 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3857 av_strlcpy(hostname, p + 1,
3858 FFMIN(hostname_size, brk - p));
3859 if (brk[1] == ':' && port_ptr)
3860 *port_ptr = atoi(brk + 2);
3861 } else if ((col = strchr(p, ':')) && col < ls) {
3862 av_strlcpy(hostname, p,
3863 FFMIN(col + 1 - p, hostname_size));
3865 *port_ptr = atoi(col + 1);
3867 av_strlcpy(hostname, p,
3868 FFMIN(ls + 1 - p, hostname_size));
3872 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3875 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3878 'C', 'D', 'E', 'F' };
3879 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3882 'c', 'd', 'e', 'f' };
3883 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3885 for (i = 0; i < s; i++) {
3886 buff[i * 2] = hex_table[src[i] >> 4];
3887 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3893 int ff_hex_to_data(uint8_t *data, const char *p)
3900 p += strspn(p, SPACE_CHARS);
3903 c = av_toupper((unsigned char) *p++);
3904 if (c >= '0' && c <= '9')
3906 else if (c >= 'A' && c <= 'F')
3921 #if FF_API_SET_PTS_INFO
3922 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3923 unsigned int pts_num, unsigned int pts_den)
3925 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3929 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3930 unsigned int pts_num, unsigned int pts_den)
3933 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
3934 if (new_tb.num != pts_num)
3935 av_log(NULL, AV_LOG_DEBUG,
3936 "st:%d removing common factor %d from timebase\n",
3937 s->index, pts_num / new_tb.num);
3939 av_log(NULL, AV_LOG_WARNING,
3940 "st:%d has too large timebase, reducing\n", s->index);
3942 if (new_tb.num <= 0 || new_tb.den <= 0) {
3943 av_log(NULL, AV_LOG_ERROR,
3944 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
3945 new_tb.num, new_tb.den,
3949 s->time_base = new_tb;
3950 av_codec_set_pkt_timebase(s->codec, new_tb);
3951 s->pts_wrap_bits = pts_wrap_bits;
3954 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3957 const char *ptr = str;
3959 /* Parse key=value pairs. */
3962 char *dest = NULL, *dest_end;
3963 int key_len, dest_len = 0;
3965 /* Skip whitespace and potential commas. */
3966 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
3973 if (!(ptr = strchr(key, '=')))
3976 key_len = ptr - key;
3978 callback_get_buf(context, key, key_len, &dest, &dest_len);
3979 dest_end = dest + dest_len - 1;
3983 while (*ptr && *ptr != '\"') {
3987 if (dest && dest < dest_end)
3991 if (dest && dest < dest_end)
3999 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
4000 if (dest && dest < dest_end)
4008 int ff_find_stream_index(AVFormatContext *s, int id)
4011 for (i = 0; i < s->nb_streams; i++)
4012 if (s->streams[i]->id == id)
4017 int64_t ff_iso8601_to_unix_time(const char *datestr)
4019 struct tm time1 = { 0 }, time2 = { 0 };
4021 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4022 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4024 return av_timegm(&time2);
4026 return av_timegm(&time1);
4029 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
4033 if (ofmt->query_codec)
4034 return ofmt->query_codec(codec_id, std_compliance);
4035 else if (ofmt->codec_tag)
4036 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4037 else if (codec_id == ofmt->video_codec ||
4038 codec_id == ofmt->audio_codec ||
4039 codec_id == ofmt->subtitle_codec)
4042 return AVERROR_PATCHWELCOME;
4045 int avformat_network_init(void)
4049 ff_network_inited_globally = 1;
4050 if ((ret = ff_network_init()) < 0)
4057 int avformat_network_deinit(void)
4066 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4067 uint64_t channel_layout, int32_t sample_rate,
4068 int32_t width, int32_t height)
4074 return AVERROR(EINVAL);
4077 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4079 if (channel_layout) {
4081 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4085 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4087 if (width || height) {
4089 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4091 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4093 return AVERROR(ENOMEM);
4094 bytestream_put_le32(&data, flags);
4096 bytestream_put_le32(&data, channels);
4098 bytestream_put_le64(&data, channel_layout);
4100 bytestream_put_le32(&data, sample_rate);
4101 if (width || height) {
4102 bytestream_put_le32(&data, width);
4103 bytestream_put_le32(&data, height);
4108 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4110 AVRational undef = {0, 1};
4111 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4112 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4113 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4115 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4116 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4117 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4118 stream_sample_aspect_ratio = undef;
4120 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4121 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4122 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4123 frame_sample_aspect_ratio = undef;
4125 if (stream_sample_aspect_ratio.num)
4126 return stream_sample_aspect_ratio;
4128 return frame_sample_aspect_ratio;
4131 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4133 AVRational fr = st->r_frame_rate;
4134 AVRational codec_fr = av_inv_q(st->codec->time_base);
4135 AVRational avg_fr = st->avg_frame_rate;
4137 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4138 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4143 if (st->codec->ticks_per_frame > 1) {
4144 codec_fr.den *= st->codec->ticks_per_frame;
4145 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4146 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4153 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4156 if (*spec <= '9' && *spec >= '0') /* opt:index */
4157 return strtol(spec, NULL, 0) == st->index;
4158 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4159 *spec == 't') { /* opt:[vasdt] */
4160 enum AVMediaType type;
4163 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4164 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4165 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4166 case 'd': type = AVMEDIA_TYPE_DATA; break;
4167 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4168 default: av_assert0(0);
4170 if (type != st->codec->codec_type)
4172 if (*spec++ == ':') { /* possibly followed by :index */
4173 int i, index = strtol(spec, NULL, 0);
4174 for (i = 0; i < s->nb_streams; i++)
4175 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4176 return i == st->index;
4180 } else if (*spec == 'p' && *(spec + 1) == ':') {
4184 prog_id = strtol(spec, &endptr, 0);
4185 for (i = 0; i < s->nb_programs; i++) {
4186 if (s->programs[i]->id != prog_id)
4189 if (*endptr++ == ':') {
4190 int stream_idx = strtol(endptr, NULL, 0);
4191 return stream_idx >= 0 &&
4192 stream_idx < s->programs[i]->nb_stream_indexes &&
4193 st->index == s->programs[i]->stream_index[stream_idx];
4196 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4197 if (st->index == s->programs[i]->stream_index[j])
4201 } else if (*spec == '#' ||
4202 (*spec == 'i' && *(spec + 1) == ':')) {
4205 spec += 1 + (*spec == 'i');
4206 stream_id = strtol(spec, &endptr, 0);
4208 return stream_id == st->id;
4209 } else if (*spec == 'm' && *(spec + 1) == ':') {
4210 AVDictionaryEntry *tag;
4215 val = strchr(spec, ':');
4217 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
4219 return AVERROR(ENOMEM);
4221 tag = av_dict_get(st->metadata, key, NULL, 0);
4223 if (!val || !strcmp(tag->value, val + 1))
4232 } else if (!*spec) /* empty specifier, matches everything */
4235 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4236 return AVERROR(EINVAL);
4239 int ff_generate_avci_extradata(AVStream *st)
4241 static const uint8_t avci100_1080p_extradata[] = {
4243 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4244 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4245 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4246 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4247 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4248 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4249 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4250 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4251 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4253 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4256 static const uint8_t avci100_1080i_extradata[] = {
4258 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4259 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4260 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4261 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4262 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4263 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4264 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4265 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4266 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4267 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4268 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
4270 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4273 static const uint8_t avci50_1080i_extradata[] = {
4275 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4276 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4277 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4278 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4279 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4280 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4281 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4282 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4283 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4284 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4285 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4287 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4290 static const uint8_t avci100_720p_extradata[] = {
4292 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4293 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4294 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4295 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4296 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4297 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4298 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4299 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4300 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4301 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4303 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4307 const uint8_t *data = NULL;
4310 if (st->codec->width == 1920) {
4311 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4312 data = avci100_1080p_extradata;
4313 size = sizeof(avci100_1080p_extradata);
4315 data = avci100_1080i_extradata;
4316 size = sizeof(avci100_1080i_extradata);
4318 } else if (st->codec->width == 1440) {
4319 data = avci50_1080i_extradata;
4320 size = sizeof(avci50_1080i_extradata);
4321 } else if (st->codec->width == 1280) {
4322 data = avci100_720p_extradata;
4323 size = sizeof(avci100_720p_extradata);
4329 av_freep(&st->codec->extradata);
4330 if (ff_alloc_extradata(st->codec, size))
4331 return AVERROR(ENOMEM);
4332 memcpy(st->codec->extradata, data, size);
4337 uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
4342 for (i = 0; i < st->nb_side_data; i++) {
4343 if (st->side_data[i].type == type) {
4345 *size = st->side_data[i].size;
4346 return st->side_data[i].data;