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 int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1260 int ret = 0, i, got_packet = 0;
1261 AVDictionary *metadata = NULL;
1263 av_init_packet(pkt);
1265 while (!got_packet && !s->parse_queue) {
1269 /* read next packet */
1270 ret = ff_read_packet(s, &cur_pkt);
1272 if (ret == AVERROR(EAGAIN))
1274 /* flush the parsers */
1275 for (i = 0; i < s->nb_streams; i++) {
1277 if (st->parser && st->need_parsing)
1278 parse_packet(s, NULL, st->index);
1280 /* all remaining packets are now in parse_queue =>
1281 * really terminate parsing */
1285 st = s->streams[cur_pkt.stream_index];
1287 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1288 cur_pkt.dts != AV_NOPTS_VALUE &&
1289 cur_pkt.pts < cur_pkt.dts) {
1290 av_log(s, AV_LOG_WARNING,
1291 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1292 cur_pkt.stream_index,
1293 av_ts2str(cur_pkt.pts),
1294 av_ts2str(cur_pkt.dts),
1297 if (s->debug & FF_FDEBUG_TS)
1298 av_log(s, AV_LOG_DEBUG,
1299 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1300 cur_pkt.stream_index,
1301 av_ts2str(cur_pkt.pts),
1302 av_ts2str(cur_pkt.dts),
1303 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1305 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1306 st->parser = av_parser_init(st->codec->codec_id);
1308 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1309 "%s, packets or times may be invalid.\n",
1310 avcodec_get_name(st->codec->codec_id));
1311 /* no parser available: just output the raw packets */
1312 st->need_parsing = AVSTREAM_PARSE_NONE;
1313 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1314 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1315 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1316 st->parser->flags |= PARSER_FLAG_ONCE;
1317 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1318 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1321 if (!st->need_parsing || !st->parser) {
1322 /* no parsing needed: we just output the packet as is */
1324 compute_pkt_fields(s, st, NULL, pkt);
1325 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1326 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1327 ff_reduce_index(s, st->index);
1328 av_add_index_entry(st, pkt->pos, pkt->dts,
1329 0, 0, AVINDEX_KEYFRAME);
1332 } else if (st->discard < AVDISCARD_ALL) {
1333 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1337 av_free_packet(&cur_pkt);
1339 if (pkt->flags & AV_PKT_FLAG_KEY)
1340 st->skip_to_keyframe = 0;
1341 if (st->skip_to_keyframe) {
1342 av_free_packet(&cur_pkt);
1350 if (!got_packet && s->parse_queue)
1351 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1354 AVStream *st = s->streams[pkt->stream_index];
1355 if (st->skip_samples) {
1356 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1358 AV_WL32(p, st->skip_samples);
1359 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1361 st->skip_samples = 0;
1364 if (st->inject_global_side_data) {
1365 for (i = 0; i < st->nb_side_data; i++) {
1366 AVPacketSideData *src_sd = &st->side_data[i];
1369 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1372 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1374 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1378 memcpy(dst_data, src_sd->data, src_sd->size);
1380 st->inject_global_side_data = 0;
1383 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1384 av_packet_merge_side_data(pkt);
1387 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1389 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1390 av_dict_copy(&s->metadata, metadata, 0);
1391 av_dict_free(&metadata);
1392 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1395 if (s->debug & FF_FDEBUG_TS)
1396 av_log(s, AV_LOG_DEBUG,
1397 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1398 "size=%d, duration=%d, flags=%d\n",
1400 av_ts2str(pkt->pts),
1401 av_ts2str(pkt->dts),
1402 pkt->size, pkt->duration, pkt->flags);
1407 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1409 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1415 ret = s->packet_buffer
1416 ? read_from_packet_buffer(&s->packet_buffer,
1417 &s->packet_buffer_end, pkt)
1418 : read_frame_internal(s, pkt);
1425 AVPacketList *pktl = s->packet_buffer;
1428 AVPacket *next_pkt = &pktl->pkt;
1430 if (next_pkt->dts != AV_NOPTS_VALUE) {
1431 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1432 // last dts seen for this stream. if any of packets following
1433 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1434 int64_t last_dts = next_pkt->dts;
1435 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1436 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1437 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1438 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1440 next_pkt->pts = pktl->pkt.dts;
1442 if (last_dts != AV_NOPTS_VALUE) {
1443 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1444 last_dts = pktl->pkt.dts;
1449 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1450 // Fixing the last reference frame had none pts issue (For MXF etc).
1451 // We only do this when
1453 // 2. we are not able to resolve a pts value for current packet.
1454 // 3. the packets for this stream at the end of the files had valid dts.
1455 next_pkt->pts = last_dts + next_pkt->duration;
1457 pktl = s->packet_buffer;
1460 /* read packet from packet buffer, if there is data */
1461 st = s->streams[next_pkt->stream_index];
1462 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1463 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1464 ret = read_from_packet_buffer(&s->packet_buffer,
1465 &s->packet_buffer_end, pkt);
1470 ret = read_frame_internal(s, pkt);
1472 if (pktl && ret != AVERROR(EAGAIN)) {
1479 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1480 &s->packet_buffer_end)) < 0)
1481 return AVERROR(ENOMEM);
1486 st = s->streams[pkt->stream_index];
1487 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1488 ff_reduce_index(s, st->index);
1489 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1492 if (is_relative(pkt->dts))
1493 pkt->dts -= RELATIVE_TS_BASE;
1494 if (is_relative(pkt->pts))
1495 pkt->pts -= RELATIVE_TS_BASE;
1500 /* XXX: suppress the packet queue */
1501 static void flush_packet_queue(AVFormatContext *s)
1503 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1504 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1505 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1507 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1510 /*******************************************************/
1513 int av_find_default_stream_index(AVFormatContext *s)
1517 int best_stream = 0;
1518 int best_score = -1;
1520 if (s->nb_streams <= 0)
1522 for (i = 0; i < s->nb_streams; i++) {
1525 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1526 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1527 if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames)
1532 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1533 if (!st->codec->sample_rate && !st->codec_info_nb_frames)
1539 if (score > best_score) {
1547 /** Flush the frame reader. */
1548 void ff_read_frame_flush(AVFormatContext *s)
1553 flush_packet_queue(s);
1555 /* Reset read state for each stream. */
1556 for (i = 0; i < s->nb_streams; i++) {
1560 av_parser_close(st->parser);
1563 st->last_IP_pts = AV_NOPTS_VALUE;
1564 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1565 if (st->first_dts == AV_NOPTS_VALUE)
1566 st->cur_dts = RELATIVE_TS_BASE;
1568 /* We set the current DTS to an unspecified origin. */
1569 st->cur_dts = AV_NOPTS_VALUE;
1571 st->probe_packets = MAX_PROBE_PACKETS;
1573 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1574 st->pts_buffer[j] = AV_NOPTS_VALUE;
1576 if (s->internal->inject_global_side_data)
1577 st->inject_global_side_data = 1;
1581 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1585 for (i = 0; i < s->nb_streams; i++) {
1586 AVStream *st = s->streams[i];
1589 av_rescale(timestamp,
1590 st->time_base.den * (int64_t) ref_st->time_base.num,
1591 st->time_base.num * (int64_t) ref_st->time_base.den);
1595 void ff_reduce_index(AVFormatContext *s, int stream_index)
1597 AVStream *st = s->streams[stream_index];
1598 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1600 if ((unsigned) st->nb_index_entries >= max_entries) {
1602 for (i = 0; 2 * i < st->nb_index_entries; i++)
1603 st->index_entries[i] = st->index_entries[2 * i];
1604 st->nb_index_entries = i;
1608 int ff_add_index_entry(AVIndexEntry **index_entries,
1609 int *nb_index_entries,
1610 unsigned int *index_entries_allocated_size,
1611 int64_t pos, int64_t timestamp,
1612 int size, int distance, int flags)
1614 AVIndexEntry *entries, *ie;
1617 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1620 if (timestamp == AV_NOPTS_VALUE)
1621 return AVERROR(EINVAL);
1623 if (size < 0 || size > 0x3FFFFFFF)
1624 return AVERROR(EINVAL);
1626 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1627 timestamp -= RELATIVE_TS_BASE;
1629 entries = av_fast_realloc(*index_entries,
1630 index_entries_allocated_size,
1631 (*nb_index_entries + 1) *
1632 sizeof(AVIndexEntry));
1636 *index_entries = entries;
1638 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1639 timestamp, AVSEEK_FLAG_ANY);
1642 index = (*nb_index_entries)++;
1643 ie = &entries[index];
1644 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1646 ie = &entries[index];
1647 if (ie->timestamp != timestamp) {
1648 if (ie->timestamp <= timestamp)
1650 memmove(entries + index + 1, entries + index,
1651 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1652 (*nb_index_entries)++;
1653 } else if (ie->pos == pos && distance < ie->min_distance)
1654 // do not reduce the distance
1655 distance = ie->min_distance;
1659 ie->timestamp = timestamp;
1660 ie->min_distance = distance;
1667 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1668 int size, int distance, int flags)
1670 timestamp = wrap_timestamp(st, timestamp);
1671 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1672 &st->index_entries_allocated_size, pos,
1673 timestamp, size, distance, flags);
1676 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1677 int64_t wanted_timestamp, int flags)
1685 // Optimize appending index entries at the end.
1686 if (b && entries[b - 1].timestamp < wanted_timestamp)
1691 timestamp = entries[m].timestamp;
1692 if (timestamp >= wanted_timestamp)
1694 if (timestamp <= wanted_timestamp)
1697 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1699 if (!(flags & AVSEEK_FLAG_ANY))
1700 while (m >= 0 && m < nb_entries &&
1701 !(entries[m].flags & AVINDEX_KEYFRAME))
1702 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1704 if (m == nb_entries)
1709 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1711 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1712 wanted_timestamp, flags);
1715 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1716 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1718 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1719 if (stream_index >= 0)
1720 ts = wrap_timestamp(s->streams[stream_index], ts);
1724 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1725 int64_t target_ts, int flags)
1727 AVInputFormat *avif = s->iformat;
1728 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1729 int64_t ts_min, ts_max, ts;
1734 if (stream_index < 0)
1737 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1740 ts_min = AV_NOPTS_VALUE;
1741 pos_limit = -1; // GCC falsely says it may be uninitialized.
1743 st = s->streams[stream_index];
1744 if (st->index_entries) {
1747 /* FIXME: Whole function must be checked for non-keyframe entries in
1748 * index case, especially read_timestamp(). */
1749 index = av_index_search_timestamp(st, target_ts,
1750 flags | AVSEEK_FLAG_BACKWARD);
1751 index = FFMAX(index, 0);
1752 e = &st->index_entries[index];
1754 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1756 ts_min = e->timestamp;
1757 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1758 pos_min, av_ts2str(ts_min));
1760 av_assert1(index == 0);
1763 index = av_index_search_timestamp(st, target_ts,
1764 flags & ~AVSEEK_FLAG_BACKWARD);
1765 av_assert0(index < st->nb_index_entries);
1767 e = &st->index_entries[index];
1768 av_assert1(e->timestamp >= target_ts);
1770 ts_max = e->timestamp;
1771 pos_limit = pos_max - e->min_distance;
1772 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1773 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1777 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1778 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1783 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1786 ff_read_frame_flush(s);
1787 ff_update_cur_dts(s, st, ts);
1792 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1793 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1795 int64_t step = 1024;
1796 int64_t limit, ts_max;
1797 int64_t filesize = avio_size(s->pb);
1798 int64_t pos_max = filesize - 1;
1801 pos_max = FFMAX(0, (pos_max) - step);
1802 ts_max = ff_read_timestamp(s, stream_index,
1803 &pos_max, limit, read_timestamp);
1805 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1806 if (ts_max == AV_NOPTS_VALUE)
1810 int64_t tmp_pos = pos_max + 1;
1811 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1812 &tmp_pos, INT64_MAX, read_timestamp);
1813 if (tmp_ts == AV_NOPTS_VALUE)
1815 av_assert0(tmp_pos > pos_max);
1818 if (tmp_pos >= filesize)
1830 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1831 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1832 int64_t ts_min, int64_t ts_max,
1833 int flags, int64_t *ts_ret,
1834 int64_t (*read_timestamp)(struct AVFormatContext *, int,
1835 int64_t *, int64_t))
1842 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1844 if (ts_min == AV_NOPTS_VALUE) {
1845 pos_min = s->data_offset;
1846 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1847 if (ts_min == AV_NOPTS_VALUE)
1851 if (ts_min >= target_ts) {
1856 if (ts_max == AV_NOPTS_VALUE) {
1857 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
1859 pos_limit = pos_max;
1862 if (ts_max <= target_ts) {
1867 if (ts_min > ts_max)
1869 else if (ts_min == ts_max)
1870 pos_limit = pos_min;
1873 while (pos_min < pos_limit) {
1875 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1876 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1877 assert(pos_limit <= pos_max);
1879 if (no_change == 0) {
1880 int64_t approximate_keyframe_distance = pos_max - pos_limit;
1881 // interpolate position (better than dichotomy)
1882 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
1884 pos_min - approximate_keyframe_distance;
1885 } else if (no_change == 1) {
1886 // bisection if interpolation did not change min / max pos last time
1887 pos = (pos_min + pos_limit) >> 1;
1889 /* linear search if bisection failed, can only happen if there
1890 * are very few or no keyframes between min/max */
1895 else if (pos > pos_limit)
1899 // May pass pos_limit instead of -1.
1900 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
1905 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
1906 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1907 pos_min, pos, pos_max,
1908 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1909 pos_limit, start_pos, no_change);
1910 if (ts == AV_NOPTS_VALUE) {
1911 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1914 if (target_ts <= ts) {
1915 pos_limit = start_pos - 1;
1919 if (target_ts >= ts) {
1925 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1926 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1929 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1931 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1932 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1933 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1939 static int seek_frame_byte(AVFormatContext *s, int stream_index,
1940 int64_t pos, int flags)
1942 int64_t pos_min, pos_max;
1944 pos_min = s->data_offset;
1945 pos_max = avio_size(s->pb) - 1;
1949 else if (pos > pos_max)
1952 avio_seek(s->pb, pos, SEEK_SET);
1954 s->io_repositioned = 1;
1959 static int seek_frame_generic(AVFormatContext *s, int stream_index,
1960 int64_t timestamp, int flags)
1967 st = s->streams[stream_index];
1969 index = av_index_search_timestamp(st, timestamp, flags);
1971 if (index < 0 && st->nb_index_entries &&
1972 timestamp < st->index_entries[0].timestamp)
1975 if (index < 0 || index == st->nb_index_entries - 1) {
1979 if (st->nb_index_entries) {
1980 av_assert0(st->index_entries);
1981 ie = &st->index_entries[st->nb_index_entries - 1];
1982 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1984 ff_update_cur_dts(s, st, ie->timestamp);
1986 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1992 read_status = av_read_frame(s, &pkt);
1993 } while (read_status == AVERROR(EAGAIN));
1994 if (read_status < 0)
1996 av_free_packet(&pkt);
1997 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
1998 if (pkt.flags & AV_PKT_FLAG_KEY)
2000 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2001 av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
2006 index = av_index_search_timestamp(st, timestamp, flags);
2011 ff_read_frame_flush(s);
2012 if (s->iformat->read_seek)
2013 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2015 ie = &st->index_entries[index];
2016 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2018 ff_update_cur_dts(s, st, ie->timestamp);
2023 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2024 int64_t timestamp, int flags)
2029 if (flags & AVSEEK_FLAG_BYTE) {
2030 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2032 ff_read_frame_flush(s);
2033 return seek_frame_byte(s, stream_index, timestamp, flags);
2036 if (stream_index < 0) {
2037 stream_index = av_find_default_stream_index(s);
2038 if (stream_index < 0)
2041 st = s->streams[stream_index];
2042 /* timestamp for default must be expressed in AV_TIME_BASE units */
2043 timestamp = av_rescale(timestamp, st->time_base.den,
2044 AV_TIME_BASE * (int64_t) st->time_base.num);
2047 /* first, we try the format specific seek */
2048 if (s->iformat->read_seek) {
2049 ff_read_frame_flush(s);
2050 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2056 if (s->iformat->read_timestamp &&
2057 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2058 ff_read_frame_flush(s);
2059 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2060 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2061 ff_read_frame_flush(s);
2062 return seek_frame_generic(s, stream_index, timestamp, flags);
2067 int av_seek_frame(AVFormatContext *s, int stream_index,
2068 int64_t timestamp, int flags)
2072 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2073 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2074 if ((flags & AVSEEK_FLAG_BACKWARD))
2078 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2079 flags & ~AVSEEK_FLAG_BACKWARD);
2082 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2085 ret = avformat_queue_attached_pictures(s);
2090 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2091 int64_t ts, int64_t max_ts, int flags)
2093 if (min_ts > ts || max_ts < ts)
2095 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2096 return AVERROR(EINVAL);
2099 flags |= AVSEEK_FLAG_ANY;
2100 flags &= ~AVSEEK_FLAG_BACKWARD;
2102 if (s->iformat->read_seek2) {
2104 ff_read_frame_flush(s);
2106 if (stream_index == -1 && s->nb_streams == 1) {
2107 AVRational time_base = s->streams[0]->time_base;
2108 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2109 min_ts = av_rescale_rnd(min_ts, time_base.den,
2110 time_base.num * (int64_t)AV_TIME_BASE,
2111 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2112 max_ts = av_rescale_rnd(max_ts, time_base.den,
2113 time_base.num * (int64_t)AV_TIME_BASE,
2114 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2117 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2121 ret = avformat_queue_attached_pictures(s);
2125 if (s->iformat->read_timestamp) {
2126 // try to seek via read_timestamp()
2129 // Fall back on old API if new is not implemented but old is.
2130 // Note the old API has somewhat different semantics.
2131 if (s->iformat->read_seek || 1) {
2132 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2133 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2134 if (ret<0 && ts != min_ts && max_ts != ts) {
2135 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2137 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2142 // try some generic seek like seek_frame_generic() but with new ts semantics
2143 return -1; //unreachable
2146 /*******************************************************/
2149 * Return TRUE if the stream has accurate duration in any stream.
2151 * @return TRUE if the stream has accurate duration for at least one component.
2153 static int has_duration(AVFormatContext *ic)
2158 for (i = 0; i < ic->nb_streams; i++) {
2159 st = ic->streams[i];
2160 if (st->duration != AV_NOPTS_VALUE)
2163 if (ic->duration != AV_NOPTS_VALUE)
2169 * Estimate the stream timings from the one of each components.
2171 * Also computes the global bitrate if possible.
2173 static void update_stream_timings(AVFormatContext *ic)
2175 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2176 int64_t duration, duration1, filesize;
2181 start_time = INT64_MAX;
2182 start_time_text = INT64_MAX;
2183 end_time = INT64_MIN;
2184 duration = INT64_MIN;
2185 for (i = 0; i < ic->nb_streams; i++) {
2186 st = ic->streams[i];
2187 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2188 start_time1 = av_rescale_q(st->start_time, st->time_base,
2190 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2191 if (start_time1 < start_time_text)
2192 start_time_text = start_time1;
2194 start_time = FFMIN(start_time, start_time1);
2195 end_time1 = AV_NOPTS_VALUE;
2196 if (st->duration != AV_NOPTS_VALUE) {
2197 end_time1 = start_time1 +
2198 av_rescale_q(st->duration, st->time_base,
2200 end_time = FFMAX(end_time, end_time1);
2202 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2203 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2204 p->start_time = start_time1;
2205 if (p->end_time < end_time1)
2206 p->end_time = end_time1;
2209 if (st->duration != AV_NOPTS_VALUE) {
2210 duration1 = av_rescale_q(st->duration, st->time_base,
2212 duration = FFMAX(duration, duration1);
2215 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2216 start_time = start_time_text;
2217 else if (start_time > start_time_text)
2218 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2220 if (start_time != INT64_MAX) {
2221 ic->start_time = start_time;
2222 if (end_time != INT64_MIN) {
2223 if (ic->nb_programs) {
2224 for (i = 0; i < ic->nb_programs; i++) {
2225 p = ic->programs[i];
2226 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2227 duration = FFMAX(duration, p->end_time - p->start_time);
2230 duration = FFMAX(duration, end_time - start_time);
2233 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2234 ic->duration = duration;
2236 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2237 /* compute the bitrate */
2238 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2239 (double) ic->duration;
2240 if (bitrate >= 0 && bitrate <= INT_MAX)
2241 ic->bit_rate = bitrate;
2245 static void fill_all_stream_timings(AVFormatContext *ic)
2250 update_stream_timings(ic);
2251 for (i = 0; i < ic->nb_streams; i++) {
2252 st = ic->streams[i];
2253 if (st->start_time == AV_NOPTS_VALUE) {
2254 if (ic->start_time != AV_NOPTS_VALUE)
2255 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2257 if (ic->duration != AV_NOPTS_VALUE)
2258 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2264 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2266 int64_t filesize, duration;
2267 int i, show_warning = 0;
2270 /* if bit_rate is already set, we believe it */
2271 if (ic->bit_rate <= 0) {
2273 for (i = 0; i < ic->nb_streams; i++) {
2274 st = ic->streams[i];
2275 if (st->codec->bit_rate > 0) {
2276 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2280 bit_rate += st->codec->bit_rate;
2283 ic->bit_rate = bit_rate;
2286 /* if duration is already set, we believe it */
2287 if (ic->duration == AV_NOPTS_VALUE &&
2288 ic->bit_rate != 0) {
2289 filesize = ic->pb ? avio_size(ic->pb) : 0;
2291 for (i = 0; i < ic->nb_streams; i++) {
2292 st = ic->streams[i];
2293 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2294 && st->duration == AV_NOPTS_VALUE) {
2295 duration = av_rescale(8 * filesize, st->time_base.den,
2297 (int64_t) st->time_base.num);
2298 st->duration = duration;
2305 av_log(ic, AV_LOG_WARNING,
2306 "Estimating duration from bitrate, this may be inaccurate\n");
2309 #define DURATION_MAX_READ_SIZE 250000LL
2310 #define DURATION_MAX_RETRY 4
2312 /* only usable for MPEG-PS streams */
2313 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2315 AVPacket pkt1, *pkt = &pkt1;
2317 int num, den, read_size, i, ret;
2318 int found_duration = 0;
2320 int64_t filesize, offset, duration;
2323 /* flush packet queue */
2324 flush_packet_queue(ic);
2326 for (i = 0; i < ic->nb_streams; i++) {
2327 st = ic->streams[i];
2328 if (st->start_time == AV_NOPTS_VALUE &&
2329 st->first_dts == AV_NOPTS_VALUE &&
2330 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2331 av_log(st->codec, AV_LOG_WARNING,
2332 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2335 av_parser_close(st->parser);
2340 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2341 /* estimate the end time (duration) */
2342 /* XXX: may need to support wrapping */
2343 filesize = ic->pb ? avio_size(ic->pb) : 0;
2345 is_end = found_duration;
2346 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2350 avio_seek(ic->pb, offset, SEEK_SET);
2353 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2357 ret = ff_read_packet(ic, pkt);
2358 } while (ret == AVERROR(EAGAIN));
2361 read_size += pkt->size;
2362 st = ic->streams[pkt->stream_index];
2363 if (pkt->pts != AV_NOPTS_VALUE &&
2364 (st->start_time != AV_NOPTS_VALUE ||
2365 st->first_dts != AV_NOPTS_VALUE)) {
2366 if (pkt->duration == 0) {
2367 ff_compute_frame_duration(&num, &den, st, st->parser, pkt);
2369 pkt->duration = av_rescale_rnd(1,
2370 num * (int64_t) st->time_base.den,
2371 den * (int64_t) st->time_base.num,
2375 duration = pkt->pts + pkt->duration;
2377 if (st->start_time != AV_NOPTS_VALUE)
2378 duration -= st->start_time;
2380 duration -= st->first_dts;
2382 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2383 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2384 st->duration = duration;
2385 st->info->last_duration = duration;
2388 av_free_packet(pkt);
2391 /* check if all audio/video streams have valid duration */
2394 for (i = 0; i < ic->nb_streams; i++) {
2395 st = ic->streams[i];
2396 switch (st->codec->codec_type) {
2397 case AVMEDIA_TYPE_VIDEO:
2398 case AVMEDIA_TYPE_AUDIO:
2399 if (st->duration == AV_NOPTS_VALUE)
2406 ++retry <= DURATION_MAX_RETRY);
2408 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2410 /* warn about audio/video streams which duration could not be estimated */
2411 for (i = 0; i < ic->nb_streams; i++) {
2412 st = ic->streams[i];
2413 if (st->duration == AV_NOPTS_VALUE) {
2414 switch (st->codec->codec_type) {
2415 case AVMEDIA_TYPE_VIDEO:
2416 case AVMEDIA_TYPE_AUDIO:
2417 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2418 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2420 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2424 fill_all_stream_timings(ic);
2426 avio_seek(ic->pb, old_offset, SEEK_SET);
2427 for (i = 0; i < ic->nb_streams; i++) {
2430 st = ic->streams[i];
2431 st->cur_dts = st->first_dts;
2432 st->last_IP_pts = AV_NOPTS_VALUE;
2433 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2434 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2435 st->pts_buffer[j] = AV_NOPTS_VALUE;
2439 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2443 /* get the file size, if possible */
2444 if (ic->iformat->flags & AVFMT_NOFILE) {
2447 file_size = avio_size(ic->pb);
2448 file_size = FFMAX(0, file_size);
2451 if ((!strcmp(ic->iformat->name, "mpeg") ||
2452 !strcmp(ic->iformat->name, "mpegts")) &&
2453 file_size && ic->pb->seekable) {
2454 /* get accurate estimate from the PTSes */
2455 estimate_timings_from_pts(ic, old_offset);
2456 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2457 } else if (has_duration(ic)) {
2458 /* at least one component has timings - we use them for all
2460 fill_all_stream_timings(ic);
2461 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2463 /* less precise: use bitrate info */
2464 estimate_timings_from_bit_rate(ic);
2465 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2467 update_stream_timings(ic);
2471 AVStream av_unused *st;
2472 for (i = 0; i < ic->nb_streams; i++) {
2473 st = ic->streams[i];
2474 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2475 (double) st->start_time / AV_TIME_BASE,
2476 (double) st->duration / AV_TIME_BASE);
2479 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2480 (double) ic->start_time / AV_TIME_BASE,
2481 (double) ic->duration / AV_TIME_BASE,
2482 ic->bit_rate / 1000);
2486 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2488 AVCodecContext *avctx = st->codec;
2490 #define FAIL(errmsg) do { \
2492 *errmsg_ptr = errmsg; \
2496 if ( avctx->codec_id == AV_CODEC_ID_NONE
2497 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2498 FAIL("unknown codec");
2499 switch (avctx->codec_type) {
2500 case AVMEDIA_TYPE_AUDIO:
2501 if (!avctx->frame_size && determinable_frame_size(avctx))
2502 FAIL("unspecified frame size");
2503 if (st->info->found_decoder >= 0 &&
2504 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2505 FAIL("unspecified sample format");
2506 if (!avctx->sample_rate)
2507 FAIL("unspecified sample rate");
2508 if (!avctx->channels)
2509 FAIL("unspecified number of channels");
2510 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2511 FAIL("no decodable DTS frames");
2513 case AVMEDIA_TYPE_VIDEO:
2515 FAIL("unspecified size");
2516 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2517 FAIL("unspecified pixel format");
2518 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2519 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2520 FAIL("no frame in rv30/40 and no sar");
2522 case AVMEDIA_TYPE_SUBTITLE:
2523 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2524 FAIL("unspecified size");
2526 case AVMEDIA_TYPE_DATA:
2527 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2533 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2534 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2535 AVDictionary **options)
2537 const AVCodec *codec;
2538 int got_picture = 1, ret = 0;
2539 AVFrame *frame = av_frame_alloc();
2540 AVSubtitle subtitle;
2541 AVPacket pkt = *avpkt;
2544 return AVERROR(ENOMEM);
2546 if (!avcodec_is_open(st->codec) &&
2547 st->info->found_decoder <= 0 &&
2548 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2549 AVDictionary *thread_opt = NULL;
2551 codec = find_decoder(s, st, st->codec->codec_id);
2554 st->info->found_decoder = -st->codec->codec_id;
2559 /* Force thread count to 1 since the H.264 decoder will not extract
2560 * SPS and PPS to extradata during multi-threaded decoding. */
2561 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2562 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2564 av_dict_free(&thread_opt);
2566 st->info->found_decoder = -st->codec->codec_id;
2569 st->info->found_decoder = 1;
2570 } else if (!st->info->found_decoder)
2571 st->info->found_decoder = 1;
2573 if (st->info->found_decoder < 0) {
2578 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2580 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2581 (!st->codec_info_nb_frames &&
2582 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2584 switch (st->codec->codec_type) {
2585 case AVMEDIA_TYPE_VIDEO:
2586 ret = avcodec_decode_video2(st->codec, frame,
2587 &got_picture, &pkt);
2589 case AVMEDIA_TYPE_AUDIO:
2590 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2592 case AVMEDIA_TYPE_SUBTITLE:
2593 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2594 &got_picture, &pkt);
2602 st->nb_decoded_frames++;
2609 if (!pkt.data && !got_picture)
2613 av_frame_free(&frame);
2617 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2619 while (tags->id != AV_CODEC_ID_NONE) {
2627 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2630 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2631 if (tag == tags[i].tag)
2633 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2634 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2636 return AV_CODEC_ID_NONE;
2639 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2644 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2646 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2648 return AV_CODEC_ID_NONE;
2653 if (sflags & (1 << (bps - 1))) {
2656 return AV_CODEC_ID_PCM_S8;
2658 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2660 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2662 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2664 return AV_CODEC_ID_NONE;
2669 return AV_CODEC_ID_PCM_U8;
2671 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2673 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2675 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2677 return AV_CODEC_ID_NONE;
2683 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2686 if (!av_codec_get_tag2(tags, id, &tag))
2691 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2695 for (i = 0; tags && tags[i]; i++) {
2696 const AVCodecTag *codec_tags = tags[i];
2697 while (codec_tags->id != AV_CODEC_ID_NONE) {
2698 if (codec_tags->id == id) {
2699 *tag = codec_tags->tag;
2708 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2711 for (i = 0; tags && tags[i]; i++) {
2712 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2713 if (id != AV_CODEC_ID_NONE)
2716 return AV_CODEC_ID_NONE;
2719 static void compute_chapters_end(AVFormatContext *s)
2722 int64_t max_time = s->duration +
2723 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2725 for (i = 0; i < s->nb_chapters; i++)
2726 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2727 AVChapter *ch = s->chapters[i];
2728 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2732 for (j = 0; j < s->nb_chapters; j++) {
2733 AVChapter *ch1 = s->chapters[j];
2734 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2736 if (j != i && next_start > ch->start && next_start < end)
2739 ch->end = (end == INT64_MAX) ? ch->start : end;
2743 static int get_std_framerate(int i)
2746 return (i + 1) * 1001;
2748 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12;
2751 /* Is the time base unreliable?
2752 * This is a heuristic to balance between quick acceptance of the values in
2753 * the headers vs. some extra checks.
2754 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2755 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2756 * And there are "variable" fps files this needs to detect as well. */
2757 static int tb_unreliable(AVCodecContext *c)
2759 if (c->time_base.den >= 101L * c->time_base.num ||
2760 c->time_base.den < 5L * c->time_base.num ||
2761 // c->codec_tag == AV_RL32("DIVX") ||
2762 // c->codec_tag == AV_RL32("XVID") ||
2763 c->codec_tag == AV_RL32("mp4v") ||
2764 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2765 c->codec_id == AV_CODEC_ID_GIF ||
2766 c->codec_id == AV_CODEC_ID_H264)
2771 #if FF_API_FORMAT_PARAMETERS
2772 int av_find_stream_info(AVFormatContext *ic)
2774 return avformat_find_stream_info(ic, NULL);
2778 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2782 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2783 avctx->extradata_size = 0;
2784 return AVERROR(EINVAL);
2786 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2787 if (avctx->extradata) {
2788 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2789 avctx->extradata_size = size;
2792 avctx->extradata_size = 0;
2793 ret = AVERROR(ENOMEM);
2798 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
2800 int ret = ff_alloc_extradata(avctx, size);
2803 ret = avio_read(pb, avctx->extradata, size);
2805 av_freep(&avctx->extradata);
2806 avctx->extradata_size = 0;
2807 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
2808 return ret < 0 ? ret : AVERROR_INVALIDDATA;
2814 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
2817 int64_t last = st->info->last_dts;
2819 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
2820 && ts - (uint64_t)last < INT64_MAX) {
2821 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
2822 int64_t duration = ts - last;
2824 if (!st->info->duration_error)
2825 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2826 if (!st->info->duration_error)
2827 return AVERROR(ENOMEM);
2829 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2830 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2831 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2832 if (st->info->duration_error[0][1][i] < 1e10) {
2833 int framerate = get_std_framerate(i);
2834 double sdts = dts*framerate/(1001*12);
2835 for (j= 0; j<2; j++) {
2836 int64_t ticks = llrint(sdts+j*0.5);
2837 double error= sdts - ticks + j*0.5;
2838 st->info->duration_error[j][0][i] += error;
2839 st->info->duration_error[j][1][i] += error*error;
2843 st->info->duration_count++;
2844 st->info->rfps_duration_sum += duration;
2846 if (st->info->duration_count % 10 == 0) {
2847 int n = st->info->duration_count;
2848 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2849 if (st->info->duration_error[0][1][i] < 1e10) {
2850 double a0 = st->info->duration_error[0][0][i] / n;
2851 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
2852 double a1 = st->info->duration_error[1][0][i] / n;
2853 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
2854 if (error0 > 0.04 && error1 > 0.04) {
2855 st->info->duration_error[0][1][i] = 2e10;
2856 st->info->duration_error[1][1][i] = 2e10;
2862 // ignore the first 4 values, they might have some random jitter
2863 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
2864 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2866 if (ts != AV_NOPTS_VALUE)
2867 st->info->last_dts = ts;
2872 void ff_rfps_calculate(AVFormatContext *ic)
2876 for (i = 0; i < ic->nb_streams; i++) {
2877 AVStream *st = ic->streams[i];
2879 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
2881 // the check for tb_unreliable() is not completely correct, since this is not about handling
2882 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2883 // ipmovie.c produces.
2884 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)
2885 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);
2886 if (st->info->duration_count>1 && !st->r_frame_rate.num
2887 && tb_unreliable(st->codec)) {
2889 double best_error= 0.01;
2890 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
2892 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
2895 if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2897 if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2900 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
2903 for (k= 0; k<2; k++) {
2904 int n = st->info->duration_count;
2905 double a= st->info->duration_error[k][0][j] / n;
2906 double error= st->info->duration_error[k][1][j]/n - a*a;
2908 if (error < best_error && best_error> 0.000000001) {
2910 num = get_std_framerate(j);
2913 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2916 // do not increase frame rate by more than 1 % in order to match a standard rate.
2917 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
2918 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2920 if ( !st->avg_frame_rate.num
2921 && st->r_frame_rate.num && st->info->rfps_duration_sum
2922 && st->info->codec_info_duration <= 0
2923 && st->info->duration_count > 2
2924 && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0
2926 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
2927 st->avg_frame_rate = st->r_frame_rate;
2930 av_freep(&st->info->duration_error);
2931 st->info->last_dts = AV_NOPTS_VALUE;
2932 st->info->duration_count = 0;
2933 st->info->rfps_duration_sum = 0;
2937 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2939 int i, count, ret = 0, j;
2942 AVPacket pkt1, *pkt;
2943 int64_t old_offset = avio_tell(ic->pb);
2944 // new streams might appear, no options for those
2945 int orig_nb_streams = ic->nb_streams;
2947 int64_t max_analyze_duration = ic->max_analyze_duration2;
2948 int64_t probesize = ic->probesize2;
2950 if (!max_analyze_duration)
2951 max_analyze_duration = ic->max_analyze_duration;
2953 probesize = ic->probesize;
2954 flush_codecs = probesize > 0;
2956 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
2958 if (!max_analyze_duration) {
2959 if (!strcmp(ic->iformat->name, "flv") && !(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2960 max_analyze_duration = 10*AV_TIME_BASE;
2962 max_analyze_duration = 5*AV_TIME_BASE;
2966 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
2967 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
2969 for (i = 0; i < ic->nb_streams; i++) {
2970 const AVCodec *codec;
2971 AVDictionary *thread_opt = NULL;
2972 st = ic->streams[i];
2974 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2975 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2976 /* if (!st->time_base.num)
2978 if (!st->codec->time_base.num)
2979 st->codec->time_base = st->time_base;
2981 // only for the split stuff
2982 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2983 st->parser = av_parser_init(st->codec->codec_id);
2985 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
2986 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2987 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2988 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2990 } else if (st->need_parsing) {
2991 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2992 "%s, packets or times may be invalid.\n",
2993 avcodec_get_name(st->codec->codec_id));
2996 codec = find_decoder(ic, st, st->codec->codec_id);
2998 /* Force thread count to 1 since the H.264 decoder will not extract
2999 * SPS and PPS to extradata during multi-threaded decoding. */
3000 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3002 /* Ensure that subtitle_header is properly set. */
3003 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3004 && codec && !st->codec->codec) {
3005 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3006 av_log(ic, AV_LOG_WARNING,
3007 "Failed to open codec in av_find_stream_info\n");
3010 // Try to just open decoders, in case this is enough to get parameters.
3011 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3012 if (codec && !st->codec->codec)
3013 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3014 av_log(ic, AV_LOG_WARNING,
3015 "Failed to open codec in av_find_stream_info\n");
3018 av_dict_free(&thread_opt);
3021 for (i = 0; i < ic->nb_streams; i++) {
3022 #if FF_API_R_FRAME_RATE
3023 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3025 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3026 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3032 if (ff_check_interrupt(&ic->interrupt_callback)) {
3034 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3038 /* check if one codec still needs to be handled */
3039 for (i = 0; i < ic->nb_streams; i++) {
3040 int fps_analyze_framecount = 20;
3042 st = ic->streams[i];
3043 if (!has_codec_parameters(st, NULL))
3045 /* If the timebase is coarse (like the usual millisecond precision
3046 * of mkv), we need to analyze more frames to reliably arrive at
3047 * the correct fps. */
3048 if (av_q2d(st->time_base) > 0.0005)
3049 fps_analyze_framecount *= 2;
3050 if (!tb_unreliable(st->codec))
3051 fps_analyze_framecount = 0;
3052 if (ic->fps_probe_size >= 0)
3053 fps_analyze_framecount = ic->fps_probe_size;
3054 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3055 fps_analyze_framecount = 0;
3056 /* variable fps and no guess at the real fps */
3057 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3058 st->info->duration_count < fps_analyze_framecount &&
3059 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3061 if (st->parser && st->parser->parser->split &&
3062 !st->codec->extradata)
3064 if (st->first_dts == AV_NOPTS_VALUE &&
3065 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3066 st->codec_info_nb_frames < ic->max_ts_probe &&
3067 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3068 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3071 if (i == ic->nb_streams) {
3072 /* NOTE: If the format has no header, then we need to read some
3073 * packets to get most of the streams, so we cannot stop here. */
3074 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3075 /* If we found the info for all the codecs, we can stop. */
3077 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3082 /* We did not get all the codec info, but we read too much data. */
3083 if (read_size >= probesize) {
3085 av_log(ic, AV_LOG_DEBUG,
3086 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3087 for (i = 0; i < ic->nb_streams; i++)
3088 if (!ic->streams[i]->r_frame_rate.num &&
3089 ic->streams[i]->info->duration_count <= 1 &&
3090 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3091 strcmp(ic->iformat->name, "image2"))
3092 av_log(ic, AV_LOG_WARNING,
3093 "Stream #%d: not enough frames to estimate rate; "
3094 "consider increasing probesize\n", i);
3098 /* NOTE: A new stream can be added there if no header in file
3099 * (AVFMTCTX_NOHEADER). */
3100 ret = read_frame_internal(ic, &pkt1);
3101 if (ret == AVERROR(EAGAIN))
3109 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3110 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3112 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3113 &ic->packet_buffer_end);
3115 ret = AVERROR(ENOMEM);
3116 goto find_stream_info_err;
3118 if ((ret = av_dup_packet(pkt)) < 0)
3119 goto find_stream_info_err;
3122 st = ic->streams[pkt->stream_index];
3123 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3124 read_size += pkt->size;
3126 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3127 /* check for non-increasing dts */
3128 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3129 st->info->fps_last_dts >= pkt->dts) {
3130 av_log(ic, AV_LOG_DEBUG,
3131 "Non-increasing DTS in stream %d: packet %d with DTS "
3132 "%"PRId64", packet %d with DTS %"PRId64"\n",
3133 st->index, st->info->fps_last_dts_idx,
3134 st->info->fps_last_dts, st->codec_info_nb_frames,
3136 st->info->fps_first_dts =
3137 st->info->fps_last_dts = AV_NOPTS_VALUE;
3139 /* Check for a discontinuity in dts. If the difference in dts
3140 * is more than 1000 times the average packet duration in the
3141 * sequence, we treat it as a discontinuity. */
3142 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3143 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3144 (pkt->dts - st->info->fps_last_dts) / 1000 >
3145 (st->info->fps_last_dts - st->info->fps_first_dts) /
3146 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3147 av_log(ic, AV_LOG_WARNING,
3148 "DTS discontinuity 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;
3157 /* update stored dts values */
3158 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3159 st->info->fps_first_dts = pkt->dts;
3160 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3162 st->info->fps_last_dts = pkt->dts;
3163 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3165 if (st->codec_info_nb_frames>1) {
3168 if (st->time_base.den > 0)
3169 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3170 if (st->avg_frame_rate.num > 0)
3171 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3174 && st->codec_info_nb_frames>30
3175 && st->info->fps_first_dts != AV_NOPTS_VALUE
3176 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3177 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3179 if (t >= max_analyze_duration) {
3180 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n",
3181 max_analyze_duration,
3185 if (pkt->duration) {
3186 st->info->codec_info_duration += pkt->duration;
3187 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3190 #if FF_API_R_FRAME_RATE
3191 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3192 ff_rfps_add_frame(ic, st, pkt->dts);
3194 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3195 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3196 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3197 if (ff_alloc_extradata(st->codec, i))
3198 return AVERROR(ENOMEM);
3199 memcpy(st->codec->extradata, pkt->data,
3200 st->codec->extradata_size);
3204 /* If still no information, we try to open the codec and to
3205 * decompress the frame. We try to avoid that in most cases as
3206 * it takes longer and uses more memory. For MPEG-4, we need to
3207 * decompress for QuickTime.
3209 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3210 * least one frame of codec data, this makes sure the codec initializes
3211 * the channel configuration and does not only trust the values from
3213 try_decode_frame(ic, st, pkt,
3214 (options && i < orig_nb_streams) ? &options[i] : NULL);
3216 st->codec_info_nb_frames++;
3221 AVPacket empty_pkt = { 0 };
3223 av_init_packet(&empty_pkt);
3225 for (i = 0; i < ic->nb_streams; i++) {
3227 st = ic->streams[i];
3229 /* flush the decoders */
3230 if (st->info->found_decoder == 1) {
3232 err = try_decode_frame(ic, st, &empty_pkt,
3233 (options && i < orig_nb_streams)
3234 ? &options[i] : NULL);
3235 } while (err > 0 && !has_codec_parameters(st, NULL));
3238 av_log(ic, AV_LOG_INFO,
3239 "decoding for stream %d failed\n", st->index);
3244 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
3246 // close codecs which were opened in try_decode_frame()
3247 for (i = 0; i < ic->nb_streams; i++) {
3248 st = ic->streams[i];
3249 avcodec_close(st->codec);
3252 ff_rfps_calculate(ic);
3254 for (i = 0; i < ic->nb_streams; i++) {
3255 st = ic->streams[i];
3256 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3257 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3258 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3259 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt)
3260 st->codec->codec_tag= tag;
3263 /* estimate average framerate if not set by demuxer */
3264 if (st->info->codec_info_duration_fields &&
3265 !st->avg_frame_rate.num &&
3266 st->info->codec_info_duration) {
3268 double best_error = 0.01;
3270 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3271 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3272 st->info->codec_info_duration < 0)
3274 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3275 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3276 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3278 /* Round guessed framerate to a "standard" framerate if it's
3279 * within 1% of the original estimate. */
3280 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3281 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3282 double error = fabs(av_q2d(st->avg_frame_rate) /
3283 av_q2d(std_fps) - 1);
3285 if (error < best_error) {
3287 best_fps = std_fps.num;
3291 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3292 best_fps, 12 * 1001, INT_MAX);
3295 if (!st->r_frame_rate.num) {
3296 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3297 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3298 st->r_frame_rate.num = st->codec->time_base.den;
3299 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3301 st->r_frame_rate.num = st->time_base.den;
3302 st->r_frame_rate.den = st->time_base.num;
3305 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3306 if (!st->codec->bits_per_coded_sample)
3307 st->codec->bits_per_coded_sample =
3308 av_get_bits_per_sample(st->codec->codec_id);
3309 // set stream disposition based on audio service type
3310 switch (st->codec->audio_service_type) {
3311 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3312 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3314 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3315 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3317 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3318 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3320 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3321 st->disposition = AV_DISPOSITION_COMMENT;
3323 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3324 st->disposition = AV_DISPOSITION_KARAOKE;
3331 estimate_timings(ic, old_offset);
3333 if (ret >= 0 && ic->nb_streams)
3334 /* We could not have all the codec parameters before EOF. */
3336 for (i = 0; i < ic->nb_streams; i++) {
3338 st = ic->streams[i];
3339 if (!has_codec_parameters(st, &errmsg)) {
3341 avcodec_string(buf, sizeof(buf), st->codec, 0);
3342 av_log(ic, AV_LOG_WARNING,
3343 "Could not find codec parameters for stream %d (%s): %s\n"
3344 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3351 compute_chapters_end(ic);
3353 find_stream_info_err:
3354 for (i = 0; i < ic->nb_streams; i++) {
3355 st = ic->streams[i];
3356 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3357 ic->streams[i]->codec->thread_count = 0;
3359 av_freep(&st->info->duration_error);
3360 av_freep(&ic->streams[i]->info);
3363 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3364 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3368 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3372 for (i = 0; i < ic->nb_programs; i++) {
3373 if (ic->programs[i] == last) {
3377 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3378 if (ic->programs[i]->stream_index[j] == s)
3379 return ic->programs[i];
3385 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3386 int wanted_stream_nb, int related_stream,
3387 AVCodec **decoder_ret, int flags)
3389 int i, nb_streams = ic->nb_streams;
3390 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3391 unsigned *program = NULL;
3392 const AVCodec *decoder = NULL, *best_decoder = NULL;
3394 if (related_stream >= 0 && wanted_stream_nb < 0) {
3395 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3397 program = p->stream_index;
3398 nb_streams = p->nb_stream_indexes;
3401 for (i = 0; i < nb_streams; i++) {
3402 int real_stream_index = program ? program[i] : i;
3403 AVStream *st = ic->streams[real_stream_index];
3404 AVCodecContext *avctx = st->codec;
3405 if (avctx->codec_type != type)
3407 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3409 if (wanted_stream_nb != real_stream_index &&
3410 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3411 AV_DISPOSITION_VISUAL_IMPAIRED))
3413 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3416 decoder = find_decoder(ic, st, st->codec->codec_id);
3419 ret = AVERROR_DECODER_NOT_FOUND;
3423 count = st->codec_info_nb_frames;
3424 bitrate = avctx->bit_rate;
3426 bitrate = avctx->rc_max_rate;
3427 multiframe = FFMIN(5, count);
3428 if ((best_multiframe > multiframe) ||
3429 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3430 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3433 best_bitrate = bitrate;
3434 best_multiframe = multiframe;
3435 ret = real_stream_index;
3436 best_decoder = decoder;
3437 if (program && i == nb_streams - 1 && ret < 0) {
3439 nb_streams = ic->nb_streams;
3440 /* no related stream found, try again with everything */
3445 *decoder_ret = (AVCodec*)best_decoder;
3449 /*******************************************************/
3451 int av_read_play(AVFormatContext *s)
3453 if (s->iformat->read_play)
3454 return s->iformat->read_play(s);
3456 return avio_pause(s->pb, 0);
3457 return AVERROR(ENOSYS);
3460 int av_read_pause(AVFormatContext *s)
3462 if (s->iformat->read_pause)
3463 return s->iformat->read_pause(s);
3465 return avio_pause(s->pb, 1);
3466 return AVERROR(ENOSYS);
3469 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3471 av_assert0(s->nb_streams>0);
3472 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3474 for (j = 0; j < st->nb_side_data; j++)
3475 av_freep(&st->side_data[j].data);
3476 av_freep(&st->side_data);
3477 st->nb_side_data = 0;
3480 av_parser_close(st->parser);
3482 if (st->attached_pic.data)
3483 av_free_packet(&st->attached_pic);
3484 av_dict_free(&st->metadata);
3485 av_freep(&st->probe_data.buf);
3486 av_freep(&st->index_entries);
3487 av_freep(&st->codec->extradata);
3488 av_freep(&st->codec->subtitle_header);
3489 av_freep(&st->codec);
3490 av_freep(&st->priv_data);
3492 av_freep(&st->info->duration_error);
3493 av_freep(&st->info);
3494 av_freep(&s->streams[ --s->nb_streams ]);
3497 void avformat_free_context(AVFormatContext *s)
3505 if (s->iformat && s->iformat->priv_class && s->priv_data)
3506 av_opt_free(s->priv_data);
3507 if (s->oformat && s->oformat->priv_class && s->priv_data)
3508 av_opt_free(s->priv_data);
3510 for (i = s->nb_streams - 1; i >= 0; i--) {
3511 ff_free_stream(s, s->streams[i]);
3513 for (i = s->nb_programs - 1; i >= 0; i--) {
3514 av_dict_free(&s->programs[i]->metadata);
3515 av_freep(&s->programs[i]->stream_index);
3516 av_freep(&s->programs[i]);
3518 av_freep(&s->programs);
3519 av_freep(&s->priv_data);
3520 while (s->nb_chapters--) {
3521 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3522 av_freep(&s->chapters[s->nb_chapters]);
3524 av_freep(&s->chapters);
3525 av_dict_free(&s->metadata);
3526 av_freep(&s->streams);
3527 av_freep(&s->internal);
3528 flush_packet_queue(s);
3532 #if FF_API_CLOSE_INPUT_FILE
3533 void av_close_input_file(AVFormatContext *s)
3535 avformat_close_input(&s);
3539 void avformat_close_input(AVFormatContext **ps)
3550 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3551 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3554 flush_packet_queue(s);
3557 if (s->iformat->read_close)
3558 s->iformat->read_close(s);
3560 avformat_free_context(s);
3567 #if FF_API_NEW_STREAM
3568 AVStream *av_new_stream(AVFormatContext *s, int id)
3570 AVStream *st = avformat_new_stream(s, NULL);
3577 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3583 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3585 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3588 s->streams = streams;
3590 st = av_mallocz(sizeof(AVStream));
3593 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3597 st->info->last_dts = AV_NOPTS_VALUE;
3599 st->codec = avcodec_alloc_context3(c);
3601 /* no default bitrate if decoding */
3602 st->codec->bit_rate = 0;
3604 /* default pts setting is MPEG-like */
3605 avpriv_set_pts_info(st, 33, 1, 90000);
3608 st->index = s->nb_streams;
3609 st->start_time = AV_NOPTS_VALUE;
3610 st->duration = AV_NOPTS_VALUE;
3611 /* we set the current DTS to 0 so that formats without any timestamps
3612 * but durations get some timestamps, formats with some unknown
3613 * timestamps have their first few packets buffered and the
3614 * timestamps corrected before they are returned to the user */
3615 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3616 st->first_dts = AV_NOPTS_VALUE;
3617 st->probe_packets = MAX_PROBE_PACKETS;
3618 st->pts_wrap_reference = AV_NOPTS_VALUE;
3619 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3621 st->last_IP_pts = AV_NOPTS_VALUE;
3622 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3623 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3624 st->pts_buffer[i] = AV_NOPTS_VALUE;
3626 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3628 #if FF_API_R_FRAME_RATE
3629 st->info->last_dts = AV_NOPTS_VALUE;
3631 st->info->fps_first_dts = AV_NOPTS_VALUE;
3632 st->info->fps_last_dts = AV_NOPTS_VALUE;
3634 st->inject_global_side_data = s->internal->inject_global_side_data;
3636 s->streams[s->nb_streams++] = st;
3640 AVProgram *av_new_program(AVFormatContext *ac, int id)
3642 AVProgram *program = NULL;
3645 av_dlog(ac, "new_program: id=0x%04x\n", id);
3647 for (i = 0; i < ac->nb_programs; i++)
3648 if (ac->programs[i]->id == id)
3649 program = ac->programs[i];
3652 program = av_mallocz(sizeof(AVProgram));
3655 dynarray_add(&ac->programs, &ac->nb_programs, program);
3656 program->discard = AVDISCARD_NONE;
3659 program->pts_wrap_reference = AV_NOPTS_VALUE;
3660 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3662 program->start_time =
3663 program->end_time = AV_NOPTS_VALUE;
3668 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3669 int64_t start, int64_t end, const char *title)
3671 AVChapter *chapter = NULL;
3674 if (end != AV_NOPTS_VALUE && start > end) {
3675 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
3679 for (i = 0; i < s->nb_chapters; i++)
3680 if (s->chapters[i]->id == id)
3681 chapter = s->chapters[i];
3684 chapter = av_mallocz(sizeof(AVChapter));
3687 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3689 av_dict_set(&chapter->metadata, "title", title, 0);
3691 chapter->time_base = time_base;
3692 chapter->start = start;
3698 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3701 AVProgram *program = NULL;
3704 if (idx >= ac->nb_streams) {
3705 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3709 for (i = 0; i < ac->nb_programs; i++) {
3710 if (ac->programs[i]->id != progid)
3712 program = ac->programs[i];
3713 for (j = 0; j < program->nb_stream_indexes; j++)
3714 if (program->stream_index[j] == idx)
3717 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3720 program->stream_index = tmp;
3721 program->stream_index[program->nb_stream_indexes++] = idx;
3726 uint64_t ff_ntp_time(void)
3728 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3731 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3734 char *q, buf1[20], c;
3735 int nd, len, percentd_found;
3747 while (av_isdigit(*p))
3748 nd = nd * 10 + *p++ - '0';
3750 } while (av_isdigit(c));
3759 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3761 if ((q - buf + len) > buf_size - 1)
3763 memcpy(q, buf1, len);
3771 if ((q - buf) < buf_size - 1)
3775 if (!percentd_found)
3784 void av_url_split(char *proto, int proto_size,
3785 char *authorization, int authorization_size,
3786 char *hostname, int hostname_size,
3787 int *port_ptr, char *path, int path_size, const char *url)
3789 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3795 if (authorization_size > 0)
3796 authorization[0] = 0;
3797 if (hostname_size > 0)
3802 /* parse protocol */
3803 if ((p = strchr(url, ':'))) {
3804 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3811 /* no protocol means plain filename */
3812 av_strlcpy(path, url, path_size);
3816 /* separate path from hostname */
3817 ls = strchr(p, '/');
3818 ls2 = strchr(p, '?');
3822 ls = FFMIN(ls, ls2);
3824 av_strlcpy(path, ls, path_size);
3826 ls = &p[strlen(p)]; // XXX
3828 /* the rest is hostname, use that to parse auth/port */
3830 /* authorization (user[:pass]@hostname) */
3832 while ((at = strchr(p, '@')) && at < ls) {
3833 av_strlcpy(authorization, at2,
3834 FFMIN(authorization_size, at + 1 - at2));
3835 p = at + 1; /* skip '@' */
3838 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3840 av_strlcpy(hostname, p + 1,
3841 FFMIN(hostname_size, brk - p));
3842 if (brk[1] == ':' && port_ptr)
3843 *port_ptr = atoi(brk + 2);
3844 } else if ((col = strchr(p, ':')) && col < ls) {
3845 av_strlcpy(hostname, p,
3846 FFMIN(col + 1 - p, hostname_size));
3848 *port_ptr = atoi(col + 1);
3850 av_strlcpy(hostname, p,
3851 FFMIN(ls + 1 - p, hostname_size));
3855 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3858 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3861 'C', 'D', 'E', 'F' };
3862 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3865 'c', 'd', 'e', 'f' };
3866 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3868 for (i = 0; i < s; i++) {
3869 buff[i * 2] = hex_table[src[i] >> 4];
3870 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3876 int ff_hex_to_data(uint8_t *data, const char *p)
3883 p += strspn(p, SPACE_CHARS);
3886 c = av_toupper((unsigned char) *p++);
3887 if (c >= '0' && c <= '9')
3889 else if (c >= 'A' && c <= 'F')
3904 #if FF_API_SET_PTS_INFO
3905 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3906 unsigned int pts_num, unsigned int pts_den)
3908 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3912 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3913 unsigned int pts_num, unsigned int pts_den)
3916 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
3917 if (new_tb.num != pts_num)
3918 av_log(NULL, AV_LOG_DEBUG,
3919 "st:%d removing common factor %d from timebase\n",
3920 s->index, pts_num / new_tb.num);
3922 av_log(NULL, AV_LOG_WARNING,
3923 "st:%d has too large timebase, reducing\n", s->index);
3925 if (new_tb.num <= 0 || new_tb.den <= 0) {
3926 av_log(NULL, AV_LOG_ERROR,
3927 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
3928 new_tb.num, new_tb.den,
3932 s->time_base = new_tb;
3933 av_codec_set_pkt_timebase(s->codec, new_tb);
3934 s->pts_wrap_bits = pts_wrap_bits;
3937 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3940 const char *ptr = str;
3942 /* Parse key=value pairs. */
3945 char *dest = NULL, *dest_end;
3946 int key_len, dest_len = 0;
3948 /* Skip whitespace and potential commas. */
3949 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
3956 if (!(ptr = strchr(key, '=')))
3959 key_len = ptr - key;
3961 callback_get_buf(context, key, key_len, &dest, &dest_len);
3962 dest_end = dest + dest_len - 1;
3966 while (*ptr && *ptr != '\"') {
3970 if (dest && dest < dest_end)
3974 if (dest && dest < dest_end)
3982 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
3983 if (dest && dest < dest_end)
3991 int ff_find_stream_index(AVFormatContext *s, int id)
3994 for (i = 0; i < s->nb_streams; i++)
3995 if (s->streams[i]->id == id)
4000 int64_t ff_iso8601_to_unix_time(const char *datestr)
4002 struct tm time1 = { 0 }, time2 = { 0 };
4004 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4005 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4007 return av_timegm(&time2);
4009 return av_timegm(&time1);
4012 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
4016 if (ofmt->query_codec)
4017 return ofmt->query_codec(codec_id, std_compliance);
4018 else if (ofmt->codec_tag)
4019 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4020 else if (codec_id == ofmt->video_codec ||
4021 codec_id == ofmt->audio_codec ||
4022 codec_id == ofmt->subtitle_codec)
4025 return AVERROR_PATCHWELCOME;
4028 int avformat_network_init(void)
4032 ff_network_inited_globally = 1;
4033 if ((ret = ff_network_init()) < 0)
4040 int avformat_network_deinit(void)
4049 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4050 uint64_t channel_layout, int32_t sample_rate,
4051 int32_t width, int32_t height)
4057 return AVERROR(EINVAL);
4060 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4062 if (channel_layout) {
4064 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4068 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4070 if (width || height) {
4072 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4074 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4076 return AVERROR(ENOMEM);
4077 bytestream_put_le32(&data, flags);
4079 bytestream_put_le32(&data, channels);
4081 bytestream_put_le64(&data, channel_layout);
4083 bytestream_put_le32(&data, sample_rate);
4084 if (width || height) {
4085 bytestream_put_le32(&data, width);
4086 bytestream_put_le32(&data, height);
4091 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4093 AVRational undef = {0, 1};
4094 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4095 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4096 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4098 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4099 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4100 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4101 stream_sample_aspect_ratio = undef;
4103 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4104 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4105 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4106 frame_sample_aspect_ratio = undef;
4108 if (stream_sample_aspect_ratio.num)
4109 return stream_sample_aspect_ratio;
4111 return frame_sample_aspect_ratio;
4114 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4116 AVRational fr = st->r_frame_rate;
4117 AVRational codec_fr = av_inv_q(st->codec->time_base);
4118 AVRational avg_fr = st->avg_frame_rate;
4120 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4121 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4126 if (st->codec->ticks_per_frame > 1) {
4127 codec_fr.den *= st->codec->ticks_per_frame;
4128 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4129 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4136 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4139 if (*spec <= '9' && *spec >= '0') /* opt:index */
4140 return strtol(spec, NULL, 0) == st->index;
4141 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4142 *spec == 't') { /* opt:[vasdt] */
4143 enum AVMediaType type;
4146 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4147 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4148 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4149 case 'd': type = AVMEDIA_TYPE_DATA; break;
4150 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4151 default: av_assert0(0);
4153 if (type != st->codec->codec_type)
4155 if (*spec++ == ':') { /* possibly followed by :index */
4156 int i, index = strtol(spec, NULL, 0);
4157 for (i = 0; i < s->nb_streams; i++)
4158 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4159 return i == st->index;
4163 } else if (*spec == 'p' && *(spec + 1) == ':') {
4167 prog_id = strtol(spec, &endptr, 0);
4168 for (i = 0; i < s->nb_programs; i++) {
4169 if (s->programs[i]->id != prog_id)
4172 if (*endptr++ == ':') {
4173 int stream_idx = strtol(endptr, NULL, 0);
4174 return stream_idx >= 0 &&
4175 stream_idx < s->programs[i]->nb_stream_indexes &&
4176 st->index == s->programs[i]->stream_index[stream_idx];
4179 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4180 if (st->index == s->programs[i]->stream_index[j])
4184 } else if (*spec == '#' ||
4185 (*spec == 'i' && *(spec + 1) == ':')) {
4188 spec += 1 + (*spec == 'i');
4189 stream_id = strtol(spec, &endptr, 0);
4191 return stream_id == st->id;
4192 } else if (*spec == 'm' && *(spec + 1) == ':') {
4193 AVDictionaryEntry *tag;
4198 val = strchr(spec, ':');
4200 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
4202 return AVERROR(ENOMEM);
4204 tag = av_dict_get(st->metadata, key, NULL, 0);
4206 if (!val || !strcmp(tag->value, val + 1))
4215 } else if (!*spec) /* empty specifier, matches everything */
4218 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4219 return AVERROR(EINVAL);
4222 int ff_generate_avci_extradata(AVStream *st)
4224 static const uint8_t avci100_1080p_extradata[] = {
4226 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4227 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4228 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4229 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4230 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4231 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4232 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4233 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4234 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4236 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4239 static const uint8_t avci100_1080i_extradata[] = {
4241 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4242 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4243 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4244 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4245 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4246 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4247 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4248 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4249 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4250 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4251 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
4253 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4256 static const uint8_t avci50_1080i_extradata[] = {
4258 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4259 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4260 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4261 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4262 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4263 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4264 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4265 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4266 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4267 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4268 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4270 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4273 static const uint8_t avci100_720p_extradata[] = {
4275 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4276 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4277 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4278 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4279 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4280 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4281 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4282 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4283 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4284 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4286 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4290 const uint8_t *data = NULL;
4293 if (st->codec->width == 1920) {
4294 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4295 data = avci100_1080p_extradata;
4296 size = sizeof(avci100_1080p_extradata);
4298 data = avci100_1080i_extradata;
4299 size = sizeof(avci100_1080i_extradata);
4301 } else if (st->codec->width == 1440) {
4302 data = avci50_1080i_extradata;
4303 size = sizeof(avci50_1080i_extradata);
4304 } else if (st->codec->width == 1280) {
4305 data = avci100_720p_extradata;
4306 size = sizeof(avci100_720p_extradata);
4312 av_freep(&st->codec->extradata);
4313 if (ff_alloc_extradata(st->codec, size))
4314 return AVERROR(ENOMEM);
4315 memcpy(st->codec->extradata, data, size);
4320 uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
4325 for (i = 0; i < st->nb_side_data; i++) {
4326 if (st->side_data[i].type == type) {
4328 *size = st->side_data[i].size;
4329 return st->side_data[i].data;