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 * Get the number of samples of an audio frame. Return -1 on error.
718 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
722 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
731 * Return the frame duration in seconds. Return 0 if not available.
733 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
734 AVCodecParserContext *pc, AVPacket *pkt)
740 switch (st->codec->codec_type) {
741 case AVMEDIA_TYPE_VIDEO:
742 if (st->r_frame_rate.num && !pc) {
743 *pnum = st->r_frame_rate.den;
744 *pden = st->r_frame_rate.num;
745 } else if (st->time_base.num * 1000LL > st->time_base.den) {
746 *pnum = st->time_base.num;
747 *pden = st->time_base.den;
748 } else if (st->codec->time_base.num * 1000LL > st->codec->time_base.den) {
749 *pnum = st->codec->time_base.num;
750 *pden = st->codec->time_base.den;
751 if (pc && pc->repeat_pict) {
752 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
753 *pden /= 1 + pc->repeat_pict;
755 *pnum *= 1 + pc->repeat_pict;
757 /* If this codec can be interlaced or progressive then we need
758 * a parser to compute duration of a packet. Thus if we have
759 * no parser in such case leave duration undefined. */
760 if (st->codec->ticks_per_frame > 1 && !pc)
764 case AVMEDIA_TYPE_AUDIO:
765 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
766 if (frame_size <= 0 || st->codec->sample_rate <= 0)
769 *pden = st->codec->sample_rate;
776 static int is_intra_only(AVCodecContext *enc) {
777 const AVCodecDescriptor *desc;
779 if (enc->codec_type != AVMEDIA_TYPE_VIDEO)
782 desc = av_codec_get_codec_descriptor(enc);
784 desc = avcodec_descriptor_get(enc->codec_id);
785 av_codec_set_codec_descriptor(enc, desc);
788 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
792 static int has_decode_delay_been_guessed(AVStream *st)
794 if (st->codec->codec_id != AV_CODEC_ID_H264) return 1;
795 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
797 #if CONFIG_H264_DECODER
798 if (st->codec->has_b_frames &&
799 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
802 if (st->codec->has_b_frames<3)
803 return st->nb_decoded_frames >= 7;
804 else if (st->codec->has_b_frames<4)
805 return st->nb_decoded_frames >= 18;
807 return st->nb_decoded_frames >= 20;
810 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
814 if (pktl == s->packet_buffer_end)
815 return s->parse_queue;
819 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
820 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
821 st->codec->codec_id != AV_CODEC_ID_HEVC;
824 int delay = st->codec->has_b_frames;
827 if (dts == AV_NOPTS_VALUE) {
828 int64_t best_score = INT64_MAX;
829 for (i = 0; i<delay; i++) {
830 if (st->pts_reorder_error_count[i]) {
831 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
832 if (score < best_score) {
839 for (i = 0; i<delay; i++) {
840 if (pts_buffer[i] != AV_NOPTS_VALUE) {
841 int64_t diff = FFABS(pts_buffer[i] - dts)
842 + (uint64_t)st->pts_reorder_error[i];
843 diff = FFMAX(diff, st->pts_reorder_error[i]);
844 st->pts_reorder_error[i] = diff;
845 st->pts_reorder_error_count[i]++;
846 if (st->pts_reorder_error_count[i] > 250) {
847 st->pts_reorder_error[i] >>= 1;
848 st->pts_reorder_error_count[i] >>= 1;
855 if (dts == AV_NOPTS_VALUE)
861 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
862 int64_t dts, int64_t pts, AVPacket *pkt)
864 AVStream *st = s->streams[stream_index];
865 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
866 int64_t pts_buffer[MAX_REORDER_DELAY+1];
870 if (st->first_dts != AV_NOPTS_VALUE ||
871 dts == AV_NOPTS_VALUE ||
872 st->cur_dts == AV_NOPTS_VALUE ||
876 delay = st->codec->has_b_frames;
877 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
879 shift = st->first_dts - RELATIVE_TS_BASE;
881 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
882 pts_buffer[i] = AV_NOPTS_VALUE;
884 if (is_relative(pts))
887 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
888 if (pktl->pkt.stream_index != stream_index)
890 if (is_relative(pktl->pkt.pts))
891 pktl->pkt.pts += shift;
893 if (is_relative(pktl->pkt.dts))
894 pktl->pkt.dts += shift;
896 if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
897 st->start_time = pktl->pkt.pts;
899 if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
900 pts_buffer[0] = pktl->pkt.pts;
901 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
902 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
904 pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
908 if (st->start_time == AV_NOPTS_VALUE)
909 st->start_time = pts;
912 static void update_initial_durations(AVFormatContext *s, AVStream *st,
913 int stream_index, int duration)
915 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
916 int64_t cur_dts = RELATIVE_TS_BASE;
918 if (st->first_dts != AV_NOPTS_VALUE) {
919 if (st->update_initial_durations_done)
921 st->update_initial_durations_done = 1;
922 cur_dts = st->first_dts;
923 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
924 if (pktl->pkt.stream_index == stream_index) {
925 if (pktl->pkt.pts != pktl->pkt.dts ||
926 pktl->pkt.dts != AV_NOPTS_VALUE ||
932 if (pktl && pktl->pkt.dts != st->first_dts) {
933 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %d) in the queue\n",
934 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
938 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
941 pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
942 st->first_dts = cur_dts;
943 } else if (st->cur_dts != RELATIVE_TS_BASE)
946 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
947 if (pktl->pkt.stream_index != stream_index)
949 if (pktl->pkt.pts == pktl->pkt.dts &&
950 (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) &&
951 !pktl->pkt.duration) {
952 pktl->pkt.dts = cur_dts;
953 if (!st->codec->has_b_frames)
954 pktl->pkt.pts = cur_dts;
955 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
956 pktl->pkt.duration = duration;
959 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
962 st->cur_dts = cur_dts;
965 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
966 AVCodecParserContext *pc, AVPacket *pkt)
968 int num, den, presentation_delayed, delay, i;
971 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
972 st->codec->codec_id != AV_CODEC_ID_HEVC;
974 if (s->flags & AVFMT_FLAG_NOFILLIN)
977 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
978 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
979 if (st->last_dts_for_order_check <= pkt->dts) {
982 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
983 "DTS %"PRIi64" < %"PRIi64" out of order\n",
985 st->last_dts_for_order_check);
986 st->dts_misordered++;
988 if (st->dts_ordered + st->dts_misordered > 250) {
989 st->dts_ordered >>= 1;
990 st->dts_misordered >>= 1;
994 st->last_dts_for_order_check = pkt->dts;
995 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
996 pkt->dts = AV_NOPTS_VALUE;
999 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1000 pkt->dts = AV_NOPTS_VALUE;
1002 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1003 && !st->codec->has_b_frames)
1004 //FIXME Set low_delay = 0 when has_b_frames = 1
1005 st->codec->has_b_frames = 1;
1007 /* do we have a video B-frame ? */
1008 delay = st->codec->has_b_frames;
1009 presentation_delayed = 0;
1011 /* XXX: need has_b_frame, but cannot get it if the codec is
1012 * not initialized */
1014 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1015 presentation_delayed = 1;
1017 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1018 st->pts_wrap_bits < 63 &&
1019 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1020 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1021 pkt->dts -= 1LL << st->pts_wrap_bits;
1023 pkt->pts += 1LL << st->pts_wrap_bits;
1026 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1027 * We take the conservative approach and discard both.
1028 * Note: If this is misbehaving for an H.264 file, then possibly
1029 * presentation_delayed is not set correctly. */
1030 if (delay == 1 && pkt->dts == pkt->pts &&
1031 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1032 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1033 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1034 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1035 pkt->dts = AV_NOPTS_VALUE;
1038 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1039 if (pkt->duration == 0) {
1040 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1042 duration = (AVRational) {num, den};
1043 pkt->duration = av_rescale_rnd(1,
1044 num * (int64_t) st->time_base.den,
1045 den * (int64_t) st->time_base.num,
1050 if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1051 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1053 /* Correct timestamps with byte offset if demuxers only have timestamps
1054 * on packet boundaries */
1055 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1056 /* this will estimate bitrate based on this frame's duration and size */
1057 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1058 if (pkt->pts != AV_NOPTS_VALUE)
1060 if (pkt->dts != AV_NOPTS_VALUE)
1064 /* This may be redundant, but it should not hurt. */
1065 if (pkt->dts != AV_NOPTS_VALUE &&
1066 pkt->pts != AV_NOPTS_VALUE &&
1067 pkt->pts > pkt->dts)
1068 presentation_delayed = 1;
1071 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1072 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1073 pkt->stream_index, pc, pkt->duration);
1074 /* Interpolate PTS and DTS if they are not present. We skip H264
1075 * currently because delay and has_b_frames are not reliably set. */
1076 if ((delay == 0 || (delay == 1 && pc)) &&
1078 if (presentation_delayed) {
1079 /* DTS = decompression timestamp */
1080 /* PTS = presentation timestamp */
1081 if (pkt->dts == AV_NOPTS_VALUE)
1082 pkt->dts = st->last_IP_pts;
1083 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1084 if (pkt->dts == AV_NOPTS_VALUE)
1085 pkt->dts = st->cur_dts;
1087 /* This is tricky: the dts must be incremented by the duration
1088 * of the frame we are displaying, i.e. the last I- or P-frame. */
1089 if (st->last_IP_duration == 0)
1090 st->last_IP_duration = pkt->duration;
1091 if (pkt->dts != AV_NOPTS_VALUE)
1092 st->cur_dts = pkt->dts + st->last_IP_duration;
1093 st->last_IP_duration = pkt->duration;
1094 st->last_IP_pts = pkt->pts;
1095 /* Cannot compute PTS if not present (we can compute it only
1096 * by knowing the future. */
1097 } else if (pkt->pts != AV_NOPTS_VALUE ||
1098 pkt->dts != AV_NOPTS_VALUE ||
1101 /* presentation is not delayed : PTS and DTS are the same */
1102 if (pkt->pts == AV_NOPTS_VALUE)
1103 pkt->pts = pkt->dts;
1104 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1106 if (pkt->pts == AV_NOPTS_VALUE)
1107 pkt->pts = st->cur_dts;
1108 pkt->dts = pkt->pts;
1109 if (pkt->pts != AV_NOPTS_VALUE)
1110 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1114 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
1115 st->pts_buffer[0] = pkt->pts;
1116 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1117 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1119 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1121 // We skipped it above so we try here.
1123 // This should happen on the first packet
1124 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1125 if (pkt->dts > st->cur_dts)
1126 st->cur_dts = pkt->dts;
1128 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1129 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1132 if (is_intra_only(st->codec))
1133 pkt->flags |= AV_PKT_FLAG_KEY;
1135 pkt->convergence_duration = pc->convergence_duration;
1138 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1141 AVPacketList *pktl = *pkt_buf;
1142 *pkt_buf = pktl->next;
1143 av_free_packet(&pktl->pkt);
1146 *pkt_buf_end = NULL;
1150 * Parse a packet, add all split parts to parse_queue.
1152 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1154 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1156 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1157 AVStream *st = s->streams[stream_index];
1158 uint8_t *data = pkt ? pkt->data : NULL;
1159 int size = pkt ? pkt->size : 0;
1160 int ret = 0, got_output = 0;
1163 av_init_packet(&flush_pkt);
1166 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1167 // preserve 0-size sync packets
1168 compute_pkt_fields(s, st, st->parser, pkt);
1171 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1174 av_init_packet(&out_pkt);
1175 len = av_parser_parse2(st->parser, st->codec,
1176 &out_pkt.data, &out_pkt.size, data, size,
1177 pkt->pts, pkt->dts, pkt->pos);
1179 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1181 /* increment read pointer */
1185 got_output = !!out_pkt.size;
1190 if (pkt->side_data) {
1191 out_pkt.side_data = pkt->side_data;
1192 out_pkt.side_data_elems = pkt->side_data_elems;
1193 pkt->side_data = NULL;
1194 pkt->side_data_elems = 0;
1197 /* set the duration */
1198 out_pkt.duration = 0;
1199 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1200 if (st->codec->sample_rate > 0) {
1202 av_rescale_q_rnd(st->parser->duration,
1203 (AVRational) { 1, st->codec->sample_rate },
1209 out_pkt.stream_index = st->index;
1210 out_pkt.pts = st->parser->pts;
1211 out_pkt.dts = st->parser->dts;
1212 out_pkt.pos = st->parser->pos;
1214 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1215 out_pkt.pos = st->parser->frame_offset;
1217 if (st->parser->key_frame == 1 ||
1218 (st->parser->key_frame == -1 &&
1219 st->parser->pict_type == AV_PICTURE_TYPE_I))
1220 out_pkt.flags |= AV_PKT_FLAG_KEY;
1222 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1223 out_pkt.flags |= AV_PKT_FLAG_KEY;
1225 compute_pkt_fields(s, st, st->parser, &out_pkt);
1227 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1228 out_pkt.buf = pkt->buf;
1230 #if FF_API_DESTRUCT_PACKET
1231 FF_DISABLE_DEPRECATION_WARNINGS
1232 out_pkt.destruct = pkt->destruct;
1233 pkt->destruct = NULL;
1234 FF_ENABLE_DEPRECATION_WARNINGS
1237 if ((ret = av_dup_packet(&out_pkt)) < 0)
1240 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1241 av_free_packet(&out_pkt);
1242 ret = AVERROR(ENOMEM);
1247 /* end of the stream => close and free the parser */
1248 if (pkt == &flush_pkt) {
1249 av_parser_close(st->parser);
1254 av_free_packet(pkt);
1258 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1259 AVPacketList **pkt_buffer_end,
1263 av_assert0(*pkt_buffer);
1266 *pkt_buffer = pktl->next;
1268 *pkt_buffer_end = NULL;
1273 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1275 int ret = 0, i, got_packet = 0;
1276 AVDictionary *metadata = NULL;
1278 av_init_packet(pkt);
1280 while (!got_packet && !s->parse_queue) {
1284 /* read next packet */
1285 ret = ff_read_packet(s, &cur_pkt);
1287 if (ret == AVERROR(EAGAIN))
1289 /* flush the parsers */
1290 for (i = 0; i < s->nb_streams; i++) {
1292 if (st->parser && st->need_parsing)
1293 parse_packet(s, NULL, st->index);
1295 /* all remaining packets are now in parse_queue =>
1296 * really terminate parsing */
1300 st = s->streams[cur_pkt.stream_index];
1302 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1303 cur_pkt.dts != AV_NOPTS_VALUE &&
1304 cur_pkt.pts < cur_pkt.dts) {
1305 av_log(s, AV_LOG_WARNING,
1306 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1307 cur_pkt.stream_index,
1308 av_ts2str(cur_pkt.pts),
1309 av_ts2str(cur_pkt.dts),
1312 if (s->debug & FF_FDEBUG_TS)
1313 av_log(s, AV_LOG_DEBUG,
1314 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1315 cur_pkt.stream_index,
1316 av_ts2str(cur_pkt.pts),
1317 av_ts2str(cur_pkt.dts),
1318 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1320 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1321 st->parser = av_parser_init(st->codec->codec_id);
1323 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1324 "%s, packets or times may be invalid.\n",
1325 avcodec_get_name(st->codec->codec_id));
1326 /* no parser available: just output the raw packets */
1327 st->need_parsing = AVSTREAM_PARSE_NONE;
1328 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1329 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1330 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1331 st->parser->flags |= PARSER_FLAG_ONCE;
1332 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1333 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1336 if (!st->need_parsing || !st->parser) {
1337 /* no parsing needed: we just output the packet as is */
1339 compute_pkt_fields(s, st, NULL, pkt);
1340 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1341 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1342 ff_reduce_index(s, st->index);
1343 av_add_index_entry(st, pkt->pos, pkt->dts,
1344 0, 0, AVINDEX_KEYFRAME);
1347 } else if (st->discard < AVDISCARD_ALL) {
1348 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1352 av_free_packet(&cur_pkt);
1354 if (pkt->flags & AV_PKT_FLAG_KEY)
1355 st->skip_to_keyframe = 0;
1356 if (st->skip_to_keyframe) {
1357 av_free_packet(&cur_pkt);
1365 if (!got_packet && s->parse_queue)
1366 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1369 AVStream *st = s->streams[pkt->stream_index];
1370 if (st->skip_samples) {
1371 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1373 AV_WL32(p, st->skip_samples);
1374 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1376 st->skip_samples = 0;
1379 if (st->inject_global_side_data) {
1380 for (i = 0; i < st->nb_side_data; i++) {
1381 AVPacketSideData *src_sd = &st->side_data[i];
1384 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1387 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1389 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1393 memcpy(dst_data, src_sd->data, src_sd->size);
1395 st->inject_global_side_data = 0;
1398 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1399 av_packet_merge_side_data(pkt);
1402 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1404 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1405 av_dict_copy(&s->metadata, metadata, 0);
1406 av_dict_free(&metadata);
1407 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1410 if (s->debug & FF_FDEBUG_TS)
1411 av_log(s, AV_LOG_DEBUG,
1412 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1413 "size=%d, duration=%d, flags=%d\n",
1415 av_ts2str(pkt->pts),
1416 av_ts2str(pkt->dts),
1417 pkt->size, pkt->duration, pkt->flags);
1422 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1424 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1430 ret = s->packet_buffer
1431 ? read_from_packet_buffer(&s->packet_buffer,
1432 &s->packet_buffer_end, pkt)
1433 : read_frame_internal(s, pkt);
1440 AVPacketList *pktl = s->packet_buffer;
1443 AVPacket *next_pkt = &pktl->pkt;
1445 if (next_pkt->dts != AV_NOPTS_VALUE) {
1446 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1447 // last dts seen for this stream. if any of packets following
1448 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1449 int64_t last_dts = next_pkt->dts;
1450 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1451 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1452 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1453 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1455 next_pkt->pts = pktl->pkt.dts;
1457 if (last_dts != AV_NOPTS_VALUE) {
1458 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1459 last_dts = pktl->pkt.dts;
1464 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1465 // Fixing the last reference frame had none pts issue (For MXF etc).
1466 // We only do this when
1468 // 2. we are not able to resolve a pts value for current packet.
1469 // 3. the packets for this stream at the end of the files had valid dts.
1470 next_pkt->pts = last_dts + next_pkt->duration;
1472 pktl = s->packet_buffer;
1475 /* read packet from packet buffer, if there is data */
1476 st = s->streams[next_pkt->stream_index];
1477 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1478 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1479 ret = read_from_packet_buffer(&s->packet_buffer,
1480 &s->packet_buffer_end, pkt);
1485 ret = read_frame_internal(s, pkt);
1487 if (pktl && ret != AVERROR(EAGAIN)) {
1494 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1495 &s->packet_buffer_end)) < 0)
1496 return AVERROR(ENOMEM);
1501 st = s->streams[pkt->stream_index];
1502 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1503 ff_reduce_index(s, st->index);
1504 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1507 if (is_relative(pkt->dts))
1508 pkt->dts -= RELATIVE_TS_BASE;
1509 if (is_relative(pkt->pts))
1510 pkt->pts -= RELATIVE_TS_BASE;
1515 /* XXX: suppress the packet queue */
1516 static void flush_packet_queue(AVFormatContext *s)
1518 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1519 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1520 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1522 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1525 /*******************************************************/
1528 int av_find_default_stream_index(AVFormatContext *s)
1532 int best_stream = 0;
1533 int best_score = -1;
1535 if (s->nb_streams <= 0)
1537 for (i = 0; i < s->nb_streams; i++) {
1540 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1541 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1542 if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames)
1547 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1548 if (!st->codec->sample_rate && !st->codec_info_nb_frames)
1554 if (score > best_score) {
1562 /** Flush the frame reader. */
1563 void ff_read_frame_flush(AVFormatContext *s)
1568 flush_packet_queue(s);
1570 /* Reset read state for each stream. */
1571 for (i = 0; i < s->nb_streams; i++) {
1575 av_parser_close(st->parser);
1578 st->last_IP_pts = AV_NOPTS_VALUE;
1579 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1580 if (st->first_dts == AV_NOPTS_VALUE)
1581 st->cur_dts = RELATIVE_TS_BASE;
1583 /* We set the current DTS to an unspecified origin. */
1584 st->cur_dts = AV_NOPTS_VALUE;
1586 st->probe_packets = MAX_PROBE_PACKETS;
1588 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1589 st->pts_buffer[j] = AV_NOPTS_VALUE;
1591 if (s->internal->inject_global_side_data)
1592 st->inject_global_side_data = 1;
1596 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1600 for (i = 0; i < s->nb_streams; i++) {
1601 AVStream *st = s->streams[i];
1604 av_rescale(timestamp,
1605 st->time_base.den * (int64_t) ref_st->time_base.num,
1606 st->time_base.num * (int64_t) ref_st->time_base.den);
1610 void ff_reduce_index(AVFormatContext *s, int stream_index)
1612 AVStream *st = s->streams[stream_index];
1613 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1615 if ((unsigned) st->nb_index_entries >= max_entries) {
1617 for (i = 0; 2 * i < st->nb_index_entries; i++)
1618 st->index_entries[i] = st->index_entries[2 * i];
1619 st->nb_index_entries = i;
1623 int ff_add_index_entry(AVIndexEntry **index_entries,
1624 int *nb_index_entries,
1625 unsigned int *index_entries_allocated_size,
1626 int64_t pos, int64_t timestamp,
1627 int size, int distance, int flags)
1629 AVIndexEntry *entries, *ie;
1632 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1635 if (timestamp == AV_NOPTS_VALUE)
1636 return AVERROR(EINVAL);
1638 if (size < 0 || size > 0x3FFFFFFF)
1639 return AVERROR(EINVAL);
1641 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1642 timestamp -= RELATIVE_TS_BASE;
1644 entries = av_fast_realloc(*index_entries,
1645 index_entries_allocated_size,
1646 (*nb_index_entries + 1) *
1647 sizeof(AVIndexEntry));
1651 *index_entries = entries;
1653 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1654 timestamp, AVSEEK_FLAG_ANY);
1657 index = (*nb_index_entries)++;
1658 ie = &entries[index];
1659 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1661 ie = &entries[index];
1662 if (ie->timestamp != timestamp) {
1663 if (ie->timestamp <= timestamp)
1665 memmove(entries + index + 1, entries + index,
1666 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1667 (*nb_index_entries)++;
1668 } else if (ie->pos == pos && distance < ie->min_distance)
1669 // do not reduce the distance
1670 distance = ie->min_distance;
1674 ie->timestamp = timestamp;
1675 ie->min_distance = distance;
1682 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1683 int size, int distance, int flags)
1685 timestamp = wrap_timestamp(st, timestamp);
1686 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1687 &st->index_entries_allocated_size, pos,
1688 timestamp, size, distance, flags);
1691 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1692 int64_t wanted_timestamp, int flags)
1700 // Optimize appending index entries at the end.
1701 if (b && entries[b - 1].timestamp < wanted_timestamp)
1706 timestamp = entries[m].timestamp;
1707 if (timestamp >= wanted_timestamp)
1709 if (timestamp <= wanted_timestamp)
1712 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1714 if (!(flags & AVSEEK_FLAG_ANY))
1715 while (m >= 0 && m < nb_entries &&
1716 !(entries[m].flags & AVINDEX_KEYFRAME))
1717 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1719 if (m == nb_entries)
1724 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1726 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1727 wanted_timestamp, flags);
1730 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1731 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1733 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1734 if (stream_index >= 0)
1735 ts = wrap_timestamp(s->streams[stream_index], ts);
1739 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1740 int64_t target_ts, int flags)
1742 AVInputFormat *avif = s->iformat;
1743 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1744 int64_t ts_min, ts_max, ts;
1749 if (stream_index < 0)
1752 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1755 ts_min = AV_NOPTS_VALUE;
1756 pos_limit = -1; // GCC falsely says it may be uninitialized.
1758 st = s->streams[stream_index];
1759 if (st->index_entries) {
1762 /* FIXME: Whole function must be checked for non-keyframe entries in
1763 * index case, especially read_timestamp(). */
1764 index = av_index_search_timestamp(st, target_ts,
1765 flags | AVSEEK_FLAG_BACKWARD);
1766 index = FFMAX(index, 0);
1767 e = &st->index_entries[index];
1769 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1771 ts_min = e->timestamp;
1772 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1773 pos_min, av_ts2str(ts_min));
1775 av_assert1(index == 0);
1778 index = av_index_search_timestamp(st, target_ts,
1779 flags & ~AVSEEK_FLAG_BACKWARD);
1780 av_assert0(index < st->nb_index_entries);
1782 e = &st->index_entries[index];
1783 av_assert1(e->timestamp >= target_ts);
1785 ts_max = e->timestamp;
1786 pos_limit = pos_max - e->min_distance;
1787 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1788 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1792 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1793 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1798 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1801 ff_read_frame_flush(s);
1802 ff_update_cur_dts(s, st, ts);
1807 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1808 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1810 int64_t step = 1024;
1811 int64_t limit, ts_max;
1812 int64_t filesize = avio_size(s->pb);
1813 int64_t pos_max = filesize - 1;
1816 pos_max = FFMAX(0, (pos_max) - step);
1817 ts_max = ff_read_timestamp(s, stream_index,
1818 &pos_max, limit, read_timestamp);
1820 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1821 if (ts_max == AV_NOPTS_VALUE)
1825 int64_t tmp_pos = pos_max + 1;
1826 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1827 &tmp_pos, INT64_MAX, read_timestamp);
1828 if (tmp_ts == AV_NOPTS_VALUE)
1830 av_assert0(tmp_pos > pos_max);
1833 if (tmp_pos >= filesize)
1845 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1846 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1847 int64_t ts_min, int64_t ts_max,
1848 int flags, int64_t *ts_ret,
1849 int64_t (*read_timestamp)(struct AVFormatContext *, int,
1850 int64_t *, int64_t))
1857 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1859 if (ts_min == AV_NOPTS_VALUE) {
1860 pos_min = s->data_offset;
1861 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1862 if (ts_min == AV_NOPTS_VALUE)
1866 if (ts_min >= target_ts) {
1871 if (ts_max == AV_NOPTS_VALUE) {
1872 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
1874 pos_limit = pos_max;
1877 if (ts_max <= target_ts) {
1882 if (ts_min > ts_max)
1884 else if (ts_min == ts_max)
1885 pos_limit = pos_min;
1888 while (pos_min < pos_limit) {
1890 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1891 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1892 assert(pos_limit <= pos_max);
1894 if (no_change == 0) {
1895 int64_t approximate_keyframe_distance = pos_max - pos_limit;
1896 // interpolate position (better than dichotomy)
1897 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
1899 pos_min - approximate_keyframe_distance;
1900 } else if (no_change == 1) {
1901 // bisection if interpolation did not change min / max pos last time
1902 pos = (pos_min + pos_limit) >> 1;
1904 /* linear search if bisection failed, can only happen if there
1905 * are very few or no keyframes between min/max */
1910 else if (pos > pos_limit)
1914 // May pass pos_limit instead of -1.
1915 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
1920 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
1921 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1922 pos_min, pos, pos_max,
1923 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1924 pos_limit, start_pos, no_change);
1925 if (ts == AV_NOPTS_VALUE) {
1926 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1929 assert(ts != AV_NOPTS_VALUE);
1930 if (target_ts <= ts) {
1931 pos_limit = start_pos - 1;
1935 if (target_ts >= ts) {
1941 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1942 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1945 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1947 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1948 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1949 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1955 static int seek_frame_byte(AVFormatContext *s, int stream_index,
1956 int64_t pos, int flags)
1958 int64_t pos_min, pos_max;
1960 pos_min = s->data_offset;
1961 pos_max = avio_size(s->pb) - 1;
1965 else if (pos > pos_max)
1968 avio_seek(s->pb, pos, SEEK_SET);
1970 s->io_repositioned = 1;
1975 static int seek_frame_generic(AVFormatContext *s, int stream_index,
1976 int64_t timestamp, int flags)
1983 st = s->streams[stream_index];
1985 index = av_index_search_timestamp(st, timestamp, flags);
1987 if (index < 0 && st->nb_index_entries &&
1988 timestamp < st->index_entries[0].timestamp)
1991 if (index < 0 || index == st->nb_index_entries - 1) {
1995 if (st->nb_index_entries) {
1996 av_assert0(st->index_entries);
1997 ie = &st->index_entries[st->nb_index_entries - 1];
1998 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2000 ff_update_cur_dts(s, st, ie->timestamp);
2002 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
2008 read_status = av_read_frame(s, &pkt);
2009 } while (read_status == AVERROR(EAGAIN));
2010 if (read_status < 0)
2012 av_free_packet(&pkt);
2013 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2014 if (pkt.flags & AV_PKT_FLAG_KEY)
2016 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2017 av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
2022 index = av_index_search_timestamp(st, timestamp, flags);
2027 ff_read_frame_flush(s);
2028 if (s->iformat->read_seek)
2029 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2031 ie = &st->index_entries[index];
2032 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2034 ff_update_cur_dts(s, st, ie->timestamp);
2039 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2040 int64_t timestamp, int flags)
2045 if (flags & AVSEEK_FLAG_BYTE) {
2046 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2048 ff_read_frame_flush(s);
2049 return seek_frame_byte(s, stream_index, timestamp, flags);
2052 if (stream_index < 0) {
2053 stream_index = av_find_default_stream_index(s);
2054 if (stream_index < 0)
2057 st = s->streams[stream_index];
2058 /* timestamp for default must be expressed in AV_TIME_BASE units */
2059 timestamp = av_rescale(timestamp, st->time_base.den,
2060 AV_TIME_BASE * (int64_t) st->time_base.num);
2063 /* first, we try the format specific seek */
2064 if (s->iformat->read_seek) {
2065 ff_read_frame_flush(s);
2066 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2072 if (s->iformat->read_timestamp &&
2073 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2074 ff_read_frame_flush(s);
2075 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2076 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2077 ff_read_frame_flush(s);
2078 return seek_frame_generic(s, stream_index, timestamp, flags);
2083 int av_seek_frame(AVFormatContext *s, int stream_index,
2084 int64_t timestamp, int flags)
2088 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2089 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2090 if ((flags & AVSEEK_FLAG_BACKWARD))
2094 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2095 flags & ~AVSEEK_FLAG_BACKWARD);
2098 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2101 ret = avformat_queue_attached_pictures(s);
2106 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2107 int64_t ts, int64_t max_ts, int flags)
2109 if (min_ts > ts || max_ts < ts)
2111 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2112 return AVERROR(EINVAL);
2115 flags |= AVSEEK_FLAG_ANY;
2116 flags &= ~AVSEEK_FLAG_BACKWARD;
2118 if (s->iformat->read_seek2) {
2120 ff_read_frame_flush(s);
2122 if (stream_index == -1 && s->nb_streams == 1) {
2123 AVRational time_base = s->streams[0]->time_base;
2124 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2125 min_ts = av_rescale_rnd(min_ts, time_base.den,
2126 time_base.num * (int64_t)AV_TIME_BASE,
2127 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2128 max_ts = av_rescale_rnd(max_ts, time_base.den,
2129 time_base.num * (int64_t)AV_TIME_BASE,
2130 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2133 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2137 ret = avformat_queue_attached_pictures(s);
2141 if (s->iformat->read_timestamp) {
2142 // try to seek via read_timestamp()
2145 // Fall back on old API if new is not implemented but old is.
2146 // Note the old API has somewhat different semantics.
2147 if (s->iformat->read_seek || 1) {
2148 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2149 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2150 if (ret<0 && ts != min_ts && max_ts != ts) {
2151 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2153 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2158 // try some generic seek like seek_frame_generic() but with new ts semantics
2159 return -1; //unreachable
2162 /*******************************************************/
2165 * Return TRUE if the stream has accurate duration in any stream.
2167 * @return TRUE if the stream has accurate duration for at least one component.
2169 static int has_duration(AVFormatContext *ic)
2174 for (i = 0; i < ic->nb_streams; i++) {
2175 st = ic->streams[i];
2176 if (st->duration != AV_NOPTS_VALUE)
2179 if (ic->duration != AV_NOPTS_VALUE)
2185 * Estimate the stream timings from the one of each components.
2187 * Also computes the global bitrate if possible.
2189 static void update_stream_timings(AVFormatContext *ic)
2191 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2192 int64_t duration, duration1, filesize;
2197 start_time = INT64_MAX;
2198 start_time_text = INT64_MAX;
2199 end_time = INT64_MIN;
2200 duration = INT64_MIN;
2201 for (i = 0; i < ic->nb_streams; i++) {
2202 st = ic->streams[i];
2203 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2204 start_time1 = av_rescale_q(st->start_time, st->time_base,
2206 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2207 if (start_time1 < start_time_text)
2208 start_time_text = start_time1;
2210 start_time = FFMIN(start_time, start_time1);
2211 end_time1 = AV_NOPTS_VALUE;
2212 if (st->duration != AV_NOPTS_VALUE) {
2213 end_time1 = start_time1 +
2214 av_rescale_q(st->duration, st->time_base,
2216 end_time = FFMAX(end_time, end_time1);
2218 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2219 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2220 p->start_time = start_time1;
2221 if (p->end_time < end_time1)
2222 p->end_time = end_time1;
2225 if (st->duration != AV_NOPTS_VALUE) {
2226 duration1 = av_rescale_q(st->duration, st->time_base,
2228 duration = FFMAX(duration, duration1);
2231 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2232 start_time = start_time_text;
2233 else if (start_time > start_time_text)
2234 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2236 if (start_time != INT64_MAX) {
2237 ic->start_time = start_time;
2238 if (end_time != INT64_MIN) {
2239 if (ic->nb_programs) {
2240 for (i = 0; i < ic->nb_programs; i++) {
2241 p = ic->programs[i];
2242 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2243 duration = FFMAX(duration, p->end_time - p->start_time);
2246 duration = FFMAX(duration, end_time - start_time);
2249 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2250 ic->duration = duration;
2252 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2253 /* compute the bitrate */
2254 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2255 (double) ic->duration;
2256 if (bitrate >= 0 && bitrate <= INT_MAX)
2257 ic->bit_rate = bitrate;
2261 static void fill_all_stream_timings(AVFormatContext *ic)
2266 update_stream_timings(ic);
2267 for (i = 0; i < ic->nb_streams; i++) {
2268 st = ic->streams[i];
2269 if (st->start_time == AV_NOPTS_VALUE) {
2270 if (ic->start_time != AV_NOPTS_VALUE)
2271 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2273 if (ic->duration != AV_NOPTS_VALUE)
2274 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2280 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2282 int64_t filesize, duration;
2283 int i, show_warning = 0;
2286 /* if bit_rate is already set, we believe it */
2287 if (ic->bit_rate <= 0) {
2289 for (i = 0; i < ic->nb_streams; i++) {
2290 st = ic->streams[i];
2291 if (st->codec->bit_rate > 0) {
2292 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2296 bit_rate += st->codec->bit_rate;
2299 ic->bit_rate = bit_rate;
2302 /* if duration is already set, we believe it */
2303 if (ic->duration == AV_NOPTS_VALUE &&
2304 ic->bit_rate != 0) {
2305 filesize = ic->pb ? avio_size(ic->pb) : 0;
2307 for (i = 0; i < ic->nb_streams; i++) {
2308 st = ic->streams[i];
2309 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2310 && st->duration == AV_NOPTS_VALUE) {
2311 duration = av_rescale(8 * filesize, st->time_base.den,
2313 (int64_t) st->time_base.num);
2314 st->duration = duration;
2321 av_log(ic, AV_LOG_WARNING,
2322 "Estimating duration from bitrate, this may be inaccurate\n");
2325 #define DURATION_MAX_READ_SIZE 250000LL
2326 #define DURATION_MAX_RETRY 4
2328 /* only usable for MPEG-PS streams */
2329 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2331 AVPacket pkt1, *pkt = &pkt1;
2333 int num, den, read_size, i, ret;
2334 int found_duration = 0;
2336 int64_t filesize, offset, duration;
2339 /* flush packet queue */
2340 flush_packet_queue(ic);
2342 for (i = 0; i < ic->nb_streams; i++) {
2343 st = ic->streams[i];
2344 if (st->start_time == AV_NOPTS_VALUE &&
2345 st->first_dts == AV_NOPTS_VALUE &&
2346 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2347 av_log(st->codec, AV_LOG_WARNING,
2348 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2351 av_parser_close(st->parser);
2356 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2357 /* estimate the end time (duration) */
2358 /* XXX: may need to support wrapping */
2359 filesize = ic->pb ? avio_size(ic->pb) : 0;
2361 is_end = found_duration;
2362 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2366 avio_seek(ic->pb, offset, SEEK_SET);
2369 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2373 ret = ff_read_packet(ic, pkt);
2374 } while (ret == AVERROR(EAGAIN));
2377 read_size += pkt->size;
2378 st = ic->streams[pkt->stream_index];
2379 if (pkt->pts != AV_NOPTS_VALUE &&
2380 (st->start_time != AV_NOPTS_VALUE ||
2381 st->first_dts != AV_NOPTS_VALUE)) {
2382 if (pkt->duration == 0) {
2383 ff_compute_frame_duration(&num, &den, st, st->parser, pkt);
2385 pkt->duration = av_rescale_rnd(1,
2386 num * (int64_t) st->time_base.den,
2387 den * (int64_t) st->time_base.num,
2391 duration = pkt->pts + pkt->duration;
2393 if (st->start_time != AV_NOPTS_VALUE)
2394 duration -= st->start_time;
2396 duration -= st->first_dts;
2398 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2399 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2400 st->duration = duration;
2401 st->info->last_duration = duration;
2404 av_free_packet(pkt);
2407 /* check if all audio/video streams have valid duration */
2410 for (i = 0; i < ic->nb_streams; i++) {
2411 st = ic->streams[i];
2412 switch (st->codec->codec_type) {
2413 case AVMEDIA_TYPE_VIDEO:
2414 case AVMEDIA_TYPE_AUDIO:
2415 if (st->duration == AV_NOPTS_VALUE)
2422 ++retry <= DURATION_MAX_RETRY);
2424 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2426 /* warn about audio/video streams which duration could not be estimated */
2427 for (i = 0; i < ic->nb_streams; i++) {
2428 st = ic->streams[i];
2429 if (st->duration == AV_NOPTS_VALUE) {
2430 switch (st->codec->codec_type) {
2431 case AVMEDIA_TYPE_VIDEO:
2432 case AVMEDIA_TYPE_AUDIO:
2433 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2434 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2436 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2440 fill_all_stream_timings(ic);
2442 avio_seek(ic->pb, old_offset, SEEK_SET);
2443 for (i = 0; i < ic->nb_streams; i++) {
2446 st = ic->streams[i];
2447 st->cur_dts = st->first_dts;
2448 st->last_IP_pts = AV_NOPTS_VALUE;
2449 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2450 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2451 st->pts_buffer[j] = AV_NOPTS_VALUE;
2455 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2459 /* get the file size, if possible */
2460 if (ic->iformat->flags & AVFMT_NOFILE) {
2463 file_size = avio_size(ic->pb);
2464 file_size = FFMAX(0, file_size);
2467 if ((!strcmp(ic->iformat->name, "mpeg") ||
2468 !strcmp(ic->iformat->name, "mpegts")) &&
2469 file_size && ic->pb->seekable) {
2470 /* get accurate estimate from the PTSes */
2471 estimate_timings_from_pts(ic, old_offset);
2472 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2473 } else if (has_duration(ic)) {
2474 /* at least one component has timings - we use them for all
2476 fill_all_stream_timings(ic);
2477 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2479 /* less precise: use bitrate info */
2480 estimate_timings_from_bit_rate(ic);
2481 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2483 update_stream_timings(ic);
2487 AVStream av_unused *st;
2488 for (i = 0; i < ic->nb_streams; i++) {
2489 st = ic->streams[i];
2490 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2491 (double) st->start_time / AV_TIME_BASE,
2492 (double) st->duration / AV_TIME_BASE);
2495 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2496 (double) ic->start_time / AV_TIME_BASE,
2497 (double) ic->duration / AV_TIME_BASE,
2498 ic->bit_rate / 1000);
2502 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2504 AVCodecContext *avctx = st->codec;
2506 #define FAIL(errmsg) do { \
2508 *errmsg_ptr = errmsg; \
2512 if ( avctx->codec_id == AV_CODEC_ID_NONE
2513 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2514 FAIL("unknown codec");
2515 switch (avctx->codec_type) {
2516 case AVMEDIA_TYPE_AUDIO:
2517 if (!avctx->frame_size && determinable_frame_size(avctx))
2518 FAIL("unspecified frame size");
2519 if (st->info->found_decoder >= 0 &&
2520 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2521 FAIL("unspecified sample format");
2522 if (!avctx->sample_rate)
2523 FAIL("unspecified sample rate");
2524 if (!avctx->channels)
2525 FAIL("unspecified number of channels");
2526 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2527 FAIL("no decodable DTS frames");
2529 case AVMEDIA_TYPE_VIDEO:
2531 FAIL("unspecified size");
2532 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2533 FAIL("unspecified pixel format");
2534 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2535 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2536 FAIL("no frame in rv30/40 and no sar");
2538 case AVMEDIA_TYPE_SUBTITLE:
2539 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2540 FAIL("unspecified size");
2542 case AVMEDIA_TYPE_DATA:
2543 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2549 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2550 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2551 AVDictionary **options)
2553 const AVCodec *codec;
2554 int got_picture = 1, ret = 0;
2555 AVFrame *frame = av_frame_alloc();
2556 AVSubtitle subtitle;
2557 AVPacket pkt = *avpkt;
2560 return AVERROR(ENOMEM);
2562 if (!avcodec_is_open(st->codec) &&
2563 st->info->found_decoder <= 0 &&
2564 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2565 AVDictionary *thread_opt = NULL;
2567 codec = find_decoder(s, st, st->codec->codec_id);
2570 st->info->found_decoder = -st->codec->codec_id;
2575 /* Force thread count to 1 since the H.264 decoder will not extract
2576 * SPS and PPS to extradata during multi-threaded decoding. */
2577 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2578 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2580 av_dict_free(&thread_opt);
2582 st->info->found_decoder = -st->codec->codec_id;
2585 st->info->found_decoder = 1;
2586 } else if (!st->info->found_decoder)
2587 st->info->found_decoder = 1;
2589 if (st->info->found_decoder < 0) {
2594 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2596 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2597 (!st->codec_info_nb_frames &&
2598 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2600 switch (st->codec->codec_type) {
2601 case AVMEDIA_TYPE_VIDEO:
2602 ret = avcodec_decode_video2(st->codec, frame,
2603 &got_picture, &pkt);
2605 case AVMEDIA_TYPE_AUDIO:
2606 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2608 case AVMEDIA_TYPE_SUBTITLE:
2609 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2610 &got_picture, &pkt);
2618 st->nb_decoded_frames++;
2625 if (!pkt.data && !got_picture)
2629 av_frame_free(&frame);
2633 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2635 while (tags->id != AV_CODEC_ID_NONE) {
2643 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2646 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2647 if (tag == tags[i].tag)
2649 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2650 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2652 return AV_CODEC_ID_NONE;
2655 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2660 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2662 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2664 return AV_CODEC_ID_NONE;
2669 if (sflags & (1 << (bps - 1))) {
2672 return AV_CODEC_ID_PCM_S8;
2674 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2676 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2678 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2680 return AV_CODEC_ID_NONE;
2685 return AV_CODEC_ID_PCM_U8;
2687 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2689 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2691 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2693 return AV_CODEC_ID_NONE;
2699 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2702 if (!av_codec_get_tag2(tags, id, &tag))
2707 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2711 for (i = 0; tags && tags[i]; i++) {
2712 const AVCodecTag *codec_tags = tags[i];
2713 while (codec_tags->id != AV_CODEC_ID_NONE) {
2714 if (codec_tags->id == id) {
2715 *tag = codec_tags->tag;
2724 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2727 for (i = 0; tags && tags[i]; i++) {
2728 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2729 if (id != AV_CODEC_ID_NONE)
2732 return AV_CODEC_ID_NONE;
2735 static void compute_chapters_end(AVFormatContext *s)
2738 int64_t max_time = s->duration +
2739 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2741 for (i = 0; i < s->nb_chapters; i++)
2742 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2743 AVChapter *ch = s->chapters[i];
2744 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2748 for (j = 0; j < s->nb_chapters; j++) {
2749 AVChapter *ch1 = s->chapters[j];
2750 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2752 if (j != i && next_start > ch->start && next_start < end)
2755 ch->end = (end == INT64_MAX) ? ch->start : end;
2759 static int get_std_framerate(int i)
2762 return (i + 1) * 1001;
2764 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12;
2767 /* Is the time base unreliable?
2768 * This is a heuristic to balance between quick acceptance of the values in
2769 * the headers vs. some extra checks.
2770 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2771 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2772 * And there are "variable" fps files this needs to detect as well. */
2773 static int tb_unreliable(AVCodecContext *c)
2775 if (c->time_base.den >= 101L * c->time_base.num ||
2776 c->time_base.den < 5L * c->time_base.num ||
2777 // c->codec_tag == AV_RL32("DIVX") ||
2778 // c->codec_tag == AV_RL32("XVID") ||
2779 c->codec_tag == AV_RL32("mp4v") ||
2780 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2781 c->codec_id == AV_CODEC_ID_GIF ||
2782 c->codec_id == AV_CODEC_ID_H264)
2787 #if FF_API_FORMAT_PARAMETERS
2788 int av_find_stream_info(AVFormatContext *ic)
2790 return avformat_find_stream_info(ic, NULL);
2794 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2798 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2799 avctx->extradata_size = 0;
2800 return AVERROR(EINVAL);
2802 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2803 if (avctx->extradata) {
2804 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2805 avctx->extradata_size = size;
2808 avctx->extradata_size = 0;
2809 ret = AVERROR(ENOMEM);
2814 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
2816 int ret = ff_alloc_extradata(avctx, size);
2819 ret = avio_read(pb, avctx->extradata, size);
2821 av_freep(&avctx->extradata);
2822 avctx->extradata_size = 0;
2823 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
2824 return ret < 0 ? ret : AVERROR_INVALIDDATA;
2830 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
2833 int64_t last = st->info->last_dts;
2835 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
2836 && ts - (uint64_t)last < INT64_MAX) {
2837 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
2838 int64_t duration = ts - last;
2840 if (!st->info->duration_error)
2841 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2842 if (!st->info->duration_error)
2843 return AVERROR(ENOMEM);
2845 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2846 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2847 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2848 if (st->info->duration_error[0][1][i] < 1e10) {
2849 int framerate = get_std_framerate(i);
2850 double sdts = dts*framerate/(1001*12);
2851 for (j= 0; j<2; j++) {
2852 int64_t ticks = llrint(sdts+j*0.5);
2853 double error= sdts - ticks + j*0.5;
2854 st->info->duration_error[j][0][i] += error;
2855 st->info->duration_error[j][1][i] += error*error;
2859 st->info->duration_count++;
2860 st->info->rfps_duration_sum += duration;
2862 if (st->info->duration_count % 10 == 0) {
2863 int n = st->info->duration_count;
2864 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2865 if (st->info->duration_error[0][1][i] < 1e10) {
2866 double a0 = st->info->duration_error[0][0][i] / n;
2867 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
2868 double a1 = st->info->duration_error[1][0][i] / n;
2869 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
2870 if (error0 > 0.04 && error1 > 0.04) {
2871 st->info->duration_error[0][1][i] = 2e10;
2872 st->info->duration_error[1][1][i] = 2e10;
2878 // ignore the first 4 values, they might have some random jitter
2879 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
2880 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2882 if (ts != AV_NOPTS_VALUE)
2883 st->info->last_dts = ts;
2888 void ff_rfps_calculate(AVFormatContext *ic)
2892 for (i = 0; i < ic->nb_streams; i++) {
2893 AVStream *st = ic->streams[i];
2895 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
2897 // the check for tb_unreliable() is not completely correct, since this is not about handling
2898 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2899 // ipmovie.c produces.
2900 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)
2901 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);
2902 if (st->info->duration_count>1 && !st->r_frame_rate.num
2903 && tb_unreliable(st->codec)) {
2905 double best_error= 0.01;
2906 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
2908 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
2911 if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2913 if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2916 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
2919 for (k= 0; k<2; k++) {
2920 int n = st->info->duration_count;
2921 double a= st->info->duration_error[k][0][j] / n;
2922 double error= st->info->duration_error[k][1][j]/n - a*a;
2924 if (error < best_error && best_error> 0.000000001) {
2926 num = get_std_framerate(j);
2929 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2932 // do not increase frame rate by more than 1 % in order to match a standard rate.
2933 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
2934 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2936 if ( !st->avg_frame_rate.num
2937 && st->r_frame_rate.num && st->info->rfps_duration_sum
2938 && st->info->codec_info_duration <= 0
2939 && st->info->duration_count > 2
2940 && 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
2942 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
2943 st->avg_frame_rate = st->r_frame_rate;
2946 av_freep(&st->info->duration_error);
2947 st->info->last_dts = AV_NOPTS_VALUE;
2948 st->info->duration_count = 0;
2949 st->info->rfps_duration_sum = 0;
2953 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2955 int i, count, ret = 0, j;
2958 AVPacket pkt1, *pkt;
2959 int64_t old_offset = avio_tell(ic->pb);
2960 // new streams might appear, no options for those
2961 int orig_nb_streams = ic->nb_streams;
2963 int64_t max_analyze_duration = ic->max_analyze_duration2;
2964 int64_t probesize = ic->probesize2;
2966 if (!max_analyze_duration)
2967 max_analyze_duration = ic->max_analyze_duration;
2969 probesize = ic->probesize;
2970 flush_codecs = probesize > 0;
2972 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
2974 if (!max_analyze_duration) {
2975 if (!strcmp(ic->iformat->name, "flv") && !(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2976 max_analyze_duration = 10*AV_TIME_BASE;
2978 max_analyze_duration = 5*AV_TIME_BASE;
2982 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
2983 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
2985 for (i = 0; i < ic->nb_streams; i++) {
2986 const AVCodec *codec;
2987 AVDictionary *thread_opt = NULL;
2988 st = ic->streams[i];
2990 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2991 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2992 /* if (!st->time_base.num)
2994 if (!st->codec->time_base.num)
2995 st->codec->time_base = st->time_base;
2997 // only for the split stuff
2998 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2999 st->parser = av_parser_init(st->codec->codec_id);
3001 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3002 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3003 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3004 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3006 } else if (st->need_parsing) {
3007 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3008 "%s, packets or times may be invalid.\n",
3009 avcodec_get_name(st->codec->codec_id));
3012 codec = find_decoder(ic, st, st->codec->codec_id);
3014 /* Force thread count to 1 since the H.264 decoder will not extract
3015 * SPS and PPS to extradata during multi-threaded decoding. */
3016 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3018 /* Ensure that subtitle_header is properly set. */
3019 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3020 && codec && !st->codec->codec) {
3021 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3022 av_log(ic, AV_LOG_WARNING,
3023 "Failed to open codec in av_find_stream_info\n");
3026 // Try to just open decoders, in case this is enough to get parameters.
3027 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3028 if (codec && !st->codec->codec)
3029 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3030 av_log(ic, AV_LOG_WARNING,
3031 "Failed to open codec in av_find_stream_info\n");
3034 av_dict_free(&thread_opt);
3037 for (i = 0; i < ic->nb_streams; i++) {
3038 #if FF_API_R_FRAME_RATE
3039 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3041 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3042 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3048 if (ff_check_interrupt(&ic->interrupt_callback)) {
3050 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3054 /* check if one codec still needs to be handled */
3055 for (i = 0; i < ic->nb_streams; i++) {
3056 int fps_analyze_framecount = 20;
3058 st = ic->streams[i];
3059 if (!has_codec_parameters(st, NULL))
3061 /* If the timebase is coarse (like the usual millisecond precision
3062 * of mkv), we need to analyze more frames to reliably arrive at
3063 * the correct fps. */
3064 if (av_q2d(st->time_base) > 0.0005)
3065 fps_analyze_framecount *= 2;
3066 if (!tb_unreliable(st->codec))
3067 fps_analyze_framecount = 0;
3068 if (ic->fps_probe_size >= 0)
3069 fps_analyze_framecount = ic->fps_probe_size;
3070 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3071 fps_analyze_framecount = 0;
3072 /* variable fps and no guess at the real fps */
3073 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3074 st->info->duration_count < fps_analyze_framecount &&
3075 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3077 if (st->parser && st->parser->parser->split &&
3078 !st->codec->extradata)
3080 if (st->first_dts == AV_NOPTS_VALUE &&
3081 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3082 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3083 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3086 if (i == ic->nb_streams) {
3087 /* NOTE: If the format has no header, then we need to read some
3088 * packets to get most of the streams, so we cannot stop here. */
3089 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3090 /* If we found the info for all the codecs, we can stop. */
3092 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3097 /* We did not get all the codec info, but we read too much data. */
3098 if (read_size >= probesize) {
3100 av_log(ic, AV_LOG_DEBUG,
3101 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3102 for (i = 0; i < ic->nb_streams; i++)
3103 if (!ic->streams[i]->r_frame_rate.num &&
3104 ic->streams[i]->info->duration_count <= 1 &&
3105 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3106 strcmp(ic->iformat->name, "image2"))
3107 av_log(ic, AV_LOG_WARNING,
3108 "Stream #%d: not enough frames to estimate rate; "
3109 "consider increasing probesize\n", i);
3113 /* NOTE: A new stream can be added there if no header in file
3114 * (AVFMTCTX_NOHEADER). */
3115 ret = read_frame_internal(ic, &pkt1);
3116 if (ret == AVERROR(EAGAIN))
3124 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3125 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3127 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3128 &ic->packet_buffer_end);
3130 ret = AVERROR(ENOMEM);
3131 goto find_stream_info_err;
3133 if ((ret = av_dup_packet(pkt)) < 0)
3134 goto find_stream_info_err;
3137 st = ic->streams[pkt->stream_index];
3138 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3139 read_size += pkt->size;
3141 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3142 /* check for non-increasing dts */
3143 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3144 st->info->fps_last_dts >= pkt->dts) {
3145 av_log(ic, AV_LOG_DEBUG,
3146 "Non-increasing DTS in stream %d: packet %d with DTS "
3147 "%"PRId64", packet %d with DTS %"PRId64"\n",
3148 st->index, st->info->fps_last_dts_idx,
3149 st->info->fps_last_dts, st->codec_info_nb_frames,
3151 st->info->fps_first_dts =
3152 st->info->fps_last_dts = AV_NOPTS_VALUE;
3154 /* Check for a discontinuity in dts. If the difference in dts
3155 * is more than 1000 times the average packet duration in the
3156 * sequence, we treat it as a discontinuity. */
3157 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3158 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3159 (pkt->dts - st->info->fps_last_dts) / 1000 >
3160 (st->info->fps_last_dts - st->info->fps_first_dts) /
3161 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3162 av_log(ic, AV_LOG_WARNING,
3163 "DTS discontinuity in stream %d: packet %d with DTS "
3164 "%"PRId64", packet %d with DTS %"PRId64"\n",
3165 st->index, st->info->fps_last_dts_idx,
3166 st->info->fps_last_dts, st->codec_info_nb_frames,
3168 st->info->fps_first_dts =
3169 st->info->fps_last_dts = AV_NOPTS_VALUE;
3172 /* update stored dts values */
3173 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3174 st->info->fps_first_dts = pkt->dts;
3175 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3177 st->info->fps_last_dts = pkt->dts;
3178 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3180 if (st->codec_info_nb_frames>1) {
3183 if (st->time_base.den > 0)
3184 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3185 if (st->avg_frame_rate.num > 0)
3186 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3189 && st->codec_info_nb_frames>30
3190 && st->info->fps_first_dts != AV_NOPTS_VALUE
3191 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3192 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3194 if (t >= max_analyze_duration) {
3195 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n",
3196 max_analyze_duration,
3200 if (pkt->duration) {
3201 st->info->codec_info_duration += pkt->duration;
3202 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3205 #if FF_API_R_FRAME_RATE
3206 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3207 ff_rfps_add_frame(ic, st, pkt->dts);
3209 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3210 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3211 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3212 if (ff_alloc_extradata(st->codec, i))
3213 return AVERROR(ENOMEM);
3214 memcpy(st->codec->extradata, pkt->data,
3215 st->codec->extradata_size);
3219 /* If still no information, we try to open the codec and to
3220 * decompress the frame. We try to avoid that in most cases as
3221 * it takes longer and uses more memory. For MPEG-4, we need to
3222 * decompress for QuickTime.
3224 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3225 * least one frame of codec data, this makes sure the codec initializes
3226 * the channel configuration and does not only trust the values from
3228 try_decode_frame(ic, st, pkt,
3229 (options && i < orig_nb_streams) ? &options[i] : NULL);
3231 st->codec_info_nb_frames++;
3236 AVPacket empty_pkt = { 0 };
3238 av_init_packet(&empty_pkt);
3240 for (i = 0; i < ic->nb_streams; i++) {
3242 st = ic->streams[i];
3244 /* flush the decoders */
3245 if (st->info->found_decoder == 1) {
3247 err = try_decode_frame(ic, st, &empty_pkt,
3248 (options && i < orig_nb_streams)
3249 ? &options[i] : NULL);
3250 } while (err > 0 && !has_codec_parameters(st, NULL));
3253 av_log(ic, AV_LOG_INFO,
3254 "decoding for stream %d failed\n", st->index);
3259 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
3261 // close codecs which were opened in try_decode_frame()
3262 for (i = 0; i < ic->nb_streams; i++) {
3263 st = ic->streams[i];
3264 avcodec_close(st->codec);
3267 ff_rfps_calculate(ic);
3269 for (i = 0; i < ic->nb_streams; i++) {
3270 st = ic->streams[i];
3271 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3272 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3273 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3274 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt)
3275 st->codec->codec_tag= tag;
3278 /* estimate average framerate if not set by demuxer */
3279 if (st->info->codec_info_duration_fields &&
3280 !st->avg_frame_rate.num &&
3281 st->info->codec_info_duration) {
3283 double best_error = 0.01;
3285 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3286 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3287 st->info->codec_info_duration < 0)
3289 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3290 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3291 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3293 /* Round guessed framerate to a "standard" framerate if it's
3294 * within 1% of the original estimate. */
3295 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3296 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3297 double error = fabs(av_q2d(st->avg_frame_rate) /
3298 av_q2d(std_fps) - 1);
3300 if (error < best_error) {
3302 best_fps = std_fps.num;
3306 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3307 best_fps, 12 * 1001, INT_MAX);
3310 if (!st->r_frame_rate.num) {
3311 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3312 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3313 st->r_frame_rate.num = st->codec->time_base.den;
3314 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3316 st->r_frame_rate.num = st->time_base.den;
3317 st->r_frame_rate.den = st->time_base.num;
3320 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3321 if (!st->codec->bits_per_coded_sample)
3322 st->codec->bits_per_coded_sample =
3323 av_get_bits_per_sample(st->codec->codec_id);
3324 // set stream disposition based on audio service type
3325 switch (st->codec->audio_service_type) {
3326 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3327 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3329 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3330 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3332 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3333 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3335 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3336 st->disposition = AV_DISPOSITION_COMMENT;
3338 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3339 st->disposition = AV_DISPOSITION_KARAOKE;
3346 estimate_timings(ic, old_offset);
3348 if (ret >= 0 && ic->nb_streams)
3349 /* We could not have all the codec parameters before EOF. */
3351 for (i = 0; i < ic->nb_streams; i++) {
3353 st = ic->streams[i];
3354 if (!has_codec_parameters(st, &errmsg)) {
3356 avcodec_string(buf, sizeof(buf), st->codec, 0);
3357 av_log(ic, AV_LOG_WARNING,
3358 "Could not find codec parameters for stream %d (%s): %s\n"
3359 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3366 compute_chapters_end(ic);
3368 find_stream_info_err:
3369 for (i = 0; i < ic->nb_streams; i++) {
3370 st = ic->streams[i];
3371 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3372 ic->streams[i]->codec->thread_count = 0;
3374 av_freep(&st->info->duration_error);
3375 av_freep(&ic->streams[i]->info);
3378 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3379 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3383 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3387 for (i = 0; i < ic->nb_programs; i++) {
3388 if (ic->programs[i] == last) {
3392 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3393 if (ic->programs[i]->stream_index[j] == s)
3394 return ic->programs[i];
3400 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3401 int wanted_stream_nb, int related_stream,
3402 AVCodec **decoder_ret, int flags)
3404 int i, nb_streams = ic->nb_streams;
3405 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3406 unsigned *program = NULL;
3407 const AVCodec *decoder = NULL, *best_decoder = NULL;
3409 if (related_stream >= 0 && wanted_stream_nb < 0) {
3410 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3412 program = p->stream_index;
3413 nb_streams = p->nb_stream_indexes;
3416 for (i = 0; i < nb_streams; i++) {
3417 int real_stream_index = program ? program[i] : i;
3418 AVStream *st = ic->streams[real_stream_index];
3419 AVCodecContext *avctx = st->codec;
3420 if (avctx->codec_type != type)
3422 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3424 if (wanted_stream_nb != real_stream_index &&
3425 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3426 AV_DISPOSITION_VISUAL_IMPAIRED))
3428 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3431 decoder = find_decoder(ic, st, st->codec->codec_id);
3434 ret = AVERROR_DECODER_NOT_FOUND;
3438 count = st->codec_info_nb_frames;
3439 bitrate = avctx->bit_rate;
3441 bitrate = avctx->rc_max_rate;
3442 multiframe = FFMIN(5, count);
3443 if ((best_multiframe > multiframe) ||
3444 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3445 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3448 best_bitrate = bitrate;
3449 best_multiframe = multiframe;
3450 ret = real_stream_index;
3451 best_decoder = decoder;
3452 if (program && i == nb_streams - 1 && ret < 0) {
3454 nb_streams = ic->nb_streams;
3455 /* no related stream found, try again with everything */
3460 *decoder_ret = (AVCodec*)best_decoder;
3464 /*******************************************************/
3466 int av_read_play(AVFormatContext *s)
3468 if (s->iformat->read_play)
3469 return s->iformat->read_play(s);
3471 return avio_pause(s->pb, 0);
3472 return AVERROR(ENOSYS);
3475 int av_read_pause(AVFormatContext *s)
3477 if (s->iformat->read_pause)
3478 return s->iformat->read_pause(s);
3480 return avio_pause(s->pb, 1);
3481 return AVERROR(ENOSYS);
3484 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3486 av_assert0(s->nb_streams>0);
3487 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3489 for (j = 0; j < st->nb_side_data; j++)
3490 av_freep(&st->side_data[j].data);
3491 av_freep(&st->side_data);
3492 st->nb_side_data = 0;
3495 av_parser_close(st->parser);
3497 if (st->attached_pic.data)
3498 av_free_packet(&st->attached_pic);
3499 av_dict_free(&st->metadata);
3500 av_freep(&st->probe_data.buf);
3501 av_freep(&st->index_entries);
3502 av_freep(&st->codec->extradata);
3503 av_freep(&st->codec->subtitle_header);
3504 av_freep(&st->codec);
3505 av_freep(&st->priv_data);
3507 av_freep(&st->info->duration_error);
3508 av_freep(&st->info);
3509 av_freep(&s->streams[ --s->nb_streams ]);
3512 void avformat_free_context(AVFormatContext *s)
3520 if (s->iformat && s->iformat->priv_class && s->priv_data)
3521 av_opt_free(s->priv_data);
3522 if (s->oformat && s->oformat->priv_class && s->priv_data)
3523 av_opt_free(s->priv_data);
3525 for (i = s->nb_streams - 1; i >= 0; i--) {
3526 ff_free_stream(s, s->streams[i]);
3528 for (i = s->nb_programs - 1; i >= 0; i--) {
3529 av_dict_free(&s->programs[i]->metadata);
3530 av_freep(&s->programs[i]->stream_index);
3531 av_freep(&s->programs[i]);
3533 av_freep(&s->programs);
3534 av_freep(&s->priv_data);
3535 while (s->nb_chapters--) {
3536 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3537 av_freep(&s->chapters[s->nb_chapters]);
3539 av_freep(&s->chapters);
3540 av_dict_free(&s->metadata);
3541 av_freep(&s->streams);
3542 av_freep(&s->internal);
3546 #if FF_API_CLOSE_INPUT_FILE
3547 void av_close_input_file(AVFormatContext *s)
3549 avformat_close_input(&s);
3553 void avformat_close_input(AVFormatContext **ps)
3564 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3565 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3568 flush_packet_queue(s);
3571 if (s->iformat->read_close)
3572 s->iformat->read_close(s);
3574 avformat_free_context(s);
3581 #if FF_API_NEW_STREAM
3582 AVStream *av_new_stream(AVFormatContext *s, int id)
3584 AVStream *st = avformat_new_stream(s, NULL);
3591 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3597 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3599 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3602 s->streams = streams;
3604 st = av_mallocz(sizeof(AVStream));
3607 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3611 st->info->last_dts = AV_NOPTS_VALUE;
3613 st->codec = avcodec_alloc_context3(c);
3615 /* no default bitrate if decoding */
3616 st->codec->bit_rate = 0;
3618 /* default pts setting is MPEG-like */
3619 avpriv_set_pts_info(st, 33, 1, 90000);
3622 st->index = s->nb_streams;
3623 st->start_time = AV_NOPTS_VALUE;
3624 st->duration = AV_NOPTS_VALUE;
3625 /* we set the current DTS to 0 so that formats without any timestamps
3626 * but durations get some timestamps, formats with some unknown
3627 * timestamps have their first few packets buffered and the
3628 * timestamps corrected before they are returned to the user */
3629 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3630 st->first_dts = AV_NOPTS_VALUE;
3631 st->probe_packets = MAX_PROBE_PACKETS;
3632 st->pts_wrap_reference = AV_NOPTS_VALUE;
3633 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3635 st->last_IP_pts = AV_NOPTS_VALUE;
3636 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3637 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3638 st->pts_buffer[i] = AV_NOPTS_VALUE;
3640 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3642 #if FF_API_R_FRAME_RATE
3643 st->info->last_dts = AV_NOPTS_VALUE;
3645 st->info->fps_first_dts = AV_NOPTS_VALUE;
3646 st->info->fps_last_dts = AV_NOPTS_VALUE;
3648 st->inject_global_side_data = s->internal->inject_global_side_data;
3650 s->streams[s->nb_streams++] = st;
3654 AVProgram *av_new_program(AVFormatContext *ac, int id)
3656 AVProgram *program = NULL;
3659 av_dlog(ac, "new_program: id=0x%04x\n", id);
3661 for (i = 0; i < ac->nb_programs; i++)
3662 if (ac->programs[i]->id == id)
3663 program = ac->programs[i];
3666 program = av_mallocz(sizeof(AVProgram));
3669 dynarray_add(&ac->programs, &ac->nb_programs, program);
3670 program->discard = AVDISCARD_NONE;
3673 program->pts_wrap_reference = AV_NOPTS_VALUE;
3674 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3676 program->start_time =
3677 program->end_time = AV_NOPTS_VALUE;
3682 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3683 int64_t start, int64_t end, const char *title)
3685 AVChapter *chapter = NULL;
3688 if (end != AV_NOPTS_VALUE && start > end) {
3689 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
3693 for (i = 0; i < s->nb_chapters; i++)
3694 if (s->chapters[i]->id == id)
3695 chapter = s->chapters[i];
3698 chapter = av_mallocz(sizeof(AVChapter));
3701 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3703 av_dict_set(&chapter->metadata, "title", title, 0);
3705 chapter->time_base = time_base;
3706 chapter->start = start;
3712 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3715 AVProgram *program = NULL;
3718 if (idx >= ac->nb_streams) {
3719 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3723 for (i = 0; i < ac->nb_programs; i++) {
3724 if (ac->programs[i]->id != progid)
3726 program = ac->programs[i];
3727 for (j = 0; j < program->nb_stream_indexes; j++)
3728 if (program->stream_index[j] == idx)
3731 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3734 program->stream_index = tmp;
3735 program->stream_index[program->nb_stream_indexes++] = idx;
3740 uint64_t ff_ntp_time(void)
3742 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3745 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3748 char *q, buf1[20], c;
3749 int nd, len, percentd_found;
3761 while (av_isdigit(*p))
3762 nd = nd * 10 + *p++ - '0';
3764 } while (av_isdigit(c));
3773 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3775 if ((q - buf + len) > buf_size - 1)
3777 memcpy(q, buf1, len);
3785 if ((q - buf) < buf_size - 1)
3789 if (!percentd_found)
3798 void av_url_split(char *proto, int proto_size,
3799 char *authorization, int authorization_size,
3800 char *hostname, int hostname_size,
3801 int *port_ptr, char *path, int path_size, const char *url)
3803 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3809 if (authorization_size > 0)
3810 authorization[0] = 0;
3811 if (hostname_size > 0)
3816 /* parse protocol */
3817 if ((p = strchr(url, ':'))) {
3818 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3825 /* no protocol means plain filename */
3826 av_strlcpy(path, url, path_size);
3830 /* separate path from hostname */
3831 ls = strchr(p, '/');
3832 ls2 = strchr(p, '?');
3836 ls = FFMIN(ls, ls2);
3838 av_strlcpy(path, ls, path_size);
3840 ls = &p[strlen(p)]; // XXX
3842 /* the rest is hostname, use that to parse auth/port */
3844 /* authorization (user[:pass]@hostname) */
3846 while ((at = strchr(p, '@')) && at < ls) {
3847 av_strlcpy(authorization, at2,
3848 FFMIN(authorization_size, at + 1 - at2));
3849 p = at + 1; /* skip '@' */
3852 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3854 av_strlcpy(hostname, p + 1,
3855 FFMIN(hostname_size, brk - p));
3856 if (brk[1] == ':' && port_ptr)
3857 *port_ptr = atoi(brk + 2);
3858 } else if ((col = strchr(p, ':')) && col < ls) {
3859 av_strlcpy(hostname, p,
3860 FFMIN(col + 1 - p, hostname_size));
3862 *port_ptr = atoi(col + 1);
3864 av_strlcpy(hostname, p,
3865 FFMIN(ls + 1 - p, hostname_size));
3869 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3872 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3875 'C', 'D', 'E', 'F' };
3876 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3879 'c', 'd', 'e', 'f' };
3880 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3882 for (i = 0; i < s; i++) {
3883 buff[i * 2] = hex_table[src[i] >> 4];
3884 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3890 int ff_hex_to_data(uint8_t *data, const char *p)
3897 p += strspn(p, SPACE_CHARS);
3900 c = av_toupper((unsigned char) *p++);
3901 if (c >= '0' && c <= '9')
3903 else if (c >= 'A' && c <= 'F')
3918 #if FF_API_SET_PTS_INFO
3919 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3920 unsigned int pts_num, unsigned int pts_den)
3922 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3926 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3927 unsigned int pts_num, unsigned int pts_den)
3930 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
3931 if (new_tb.num != pts_num)
3932 av_log(NULL, AV_LOG_DEBUG,
3933 "st:%d removing common factor %d from timebase\n",
3934 s->index, pts_num / new_tb.num);
3936 av_log(NULL, AV_LOG_WARNING,
3937 "st:%d has too large timebase, reducing\n", s->index);
3939 if (new_tb.num <= 0 || new_tb.den <= 0) {
3940 av_log(NULL, AV_LOG_ERROR,
3941 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
3942 new_tb.num, new_tb.den,
3946 s->time_base = new_tb;
3947 av_codec_set_pkt_timebase(s->codec, new_tb);
3948 s->pts_wrap_bits = pts_wrap_bits;
3951 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3954 const char *ptr = str;
3956 /* Parse key=value pairs. */
3959 char *dest = NULL, *dest_end;
3960 int key_len, dest_len = 0;
3962 /* Skip whitespace and potential commas. */
3963 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
3970 if (!(ptr = strchr(key, '=')))
3973 key_len = ptr - key;
3975 callback_get_buf(context, key, key_len, &dest, &dest_len);
3976 dest_end = dest + dest_len - 1;
3980 while (*ptr && *ptr != '\"') {
3984 if (dest && dest < dest_end)
3988 if (dest && dest < dest_end)
3996 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
3997 if (dest && dest < dest_end)
4005 int ff_find_stream_index(AVFormatContext *s, int id)
4008 for (i = 0; i < s->nb_streams; i++)
4009 if (s->streams[i]->id == id)
4014 int64_t ff_iso8601_to_unix_time(const char *datestr)
4016 struct tm time1 = { 0 }, time2 = { 0 };
4018 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4019 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4021 return av_timegm(&time2);
4023 return av_timegm(&time1);
4026 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
4030 if (ofmt->query_codec)
4031 return ofmt->query_codec(codec_id, std_compliance);
4032 else if (ofmt->codec_tag)
4033 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4034 else if (codec_id == ofmt->video_codec ||
4035 codec_id == ofmt->audio_codec ||
4036 codec_id == ofmt->subtitle_codec)
4039 return AVERROR_PATCHWELCOME;
4042 int avformat_network_init(void)
4046 ff_network_inited_globally = 1;
4047 if ((ret = ff_network_init()) < 0)
4054 int avformat_network_deinit(void)
4063 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4064 uint64_t channel_layout, int32_t sample_rate,
4065 int32_t width, int32_t height)
4071 return AVERROR(EINVAL);
4074 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4076 if (channel_layout) {
4078 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4082 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4084 if (width || height) {
4086 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4088 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4090 return AVERROR(ENOMEM);
4091 bytestream_put_le32(&data, flags);
4093 bytestream_put_le32(&data, channels);
4095 bytestream_put_le64(&data, channel_layout);
4097 bytestream_put_le32(&data, sample_rate);
4098 if (width || height) {
4099 bytestream_put_le32(&data, width);
4100 bytestream_put_le32(&data, height);
4105 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4107 AVRational undef = {0, 1};
4108 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4109 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4110 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4112 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4113 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4114 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4115 stream_sample_aspect_ratio = undef;
4117 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4118 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4119 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4120 frame_sample_aspect_ratio = undef;
4122 if (stream_sample_aspect_ratio.num)
4123 return stream_sample_aspect_ratio;
4125 return frame_sample_aspect_ratio;
4128 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4130 AVRational fr = st->r_frame_rate;
4131 AVRational codec_fr = av_inv_q(st->codec->time_base);
4132 AVRational avg_fr = st->avg_frame_rate;
4134 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4135 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4140 if (st->codec->ticks_per_frame > 1) {
4141 codec_fr.den *= st->codec->ticks_per_frame;
4142 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4143 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4150 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4153 if (*spec <= '9' && *spec >= '0') /* opt:index */
4154 return strtol(spec, NULL, 0) == st->index;
4155 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4156 *spec == 't') { /* opt:[vasdt] */
4157 enum AVMediaType type;
4160 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4161 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4162 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4163 case 'd': type = AVMEDIA_TYPE_DATA; break;
4164 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4165 default: av_assert0(0);
4167 if (type != st->codec->codec_type)
4169 if (*spec++ == ':') { /* possibly followed by :index */
4170 int i, index = strtol(spec, NULL, 0);
4171 for (i = 0; i < s->nb_streams; i++)
4172 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4173 return i == st->index;
4177 } else if (*spec == 'p' && *(spec + 1) == ':') {
4181 prog_id = strtol(spec, &endptr, 0);
4182 for (i = 0; i < s->nb_programs; i++) {
4183 if (s->programs[i]->id != prog_id)
4186 if (*endptr++ == ':') {
4187 int stream_idx = strtol(endptr, NULL, 0);
4188 return stream_idx >= 0 &&
4189 stream_idx < s->programs[i]->nb_stream_indexes &&
4190 st->index == s->programs[i]->stream_index[stream_idx];
4193 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4194 if (st->index == s->programs[i]->stream_index[j])
4198 } else if (*spec == '#' ||
4199 (*spec == 'i' && *(spec + 1) == ':')) {
4202 spec += 1 + (*spec == 'i');
4203 stream_id = strtol(spec, &endptr, 0);
4205 return stream_id == st->id;
4206 } else if (*spec == 'm' && *(spec + 1) == ':') {
4207 AVDictionaryEntry *tag;
4212 val = strchr(spec, ':');
4214 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
4216 return AVERROR(ENOMEM);
4218 tag = av_dict_get(st->metadata, key, NULL, 0);
4220 if (!val || !strcmp(tag->value, val + 1))
4229 } else if (!*spec) /* empty specifier, matches everything */
4232 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4233 return AVERROR(EINVAL);
4236 int ff_generate_avci_extradata(AVStream *st)
4238 static const uint8_t avci100_1080p_extradata[] = {
4240 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4241 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4242 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4243 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4244 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4245 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4246 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4247 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4248 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4250 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4253 static const uint8_t avci100_1080i_extradata[] = {
4255 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4256 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4257 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4258 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4259 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4260 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4261 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4262 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4263 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4264 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4265 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
4267 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4270 static const uint8_t avci50_1080i_extradata[] = {
4272 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4273 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4274 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4275 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4276 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4277 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4278 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4279 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4280 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4281 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4282 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4284 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4287 static const uint8_t avci100_720p_extradata[] = {
4289 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4290 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4291 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4292 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4293 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4294 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4295 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4296 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4297 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4298 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4300 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4304 const uint8_t *data = NULL;
4307 if (st->codec->width == 1920) {
4308 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4309 data = avci100_1080p_extradata;
4310 size = sizeof(avci100_1080p_extradata);
4312 data = avci100_1080i_extradata;
4313 size = sizeof(avci100_1080i_extradata);
4315 } else if (st->codec->width == 1440) {
4316 data = avci50_1080i_extradata;
4317 size = sizeof(avci50_1080i_extradata);
4318 } else if (st->codec->width == 1280) {
4319 data = avci100_720p_extradata;
4320 size = sizeof(avci100_720p_extradata);
4326 av_freep(&st->codec->extradata);
4327 if (ff_alloc_extradata(st->codec, size))
4328 return AVERROR(ENOMEM);
4329 memcpy(st->codec->extradata, data, size);
4334 uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
4339 for (i = 0; i < st->nb_side_data; i++) {
4340 if (st->side_data[i].type == type) {
4342 *size = st->side_data[i].size;
4343 return st->side_data[i].data;