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(AVStream, stream, char *, recommended_encoder_configuration)
107 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
108 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
109 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
110 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
111 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
112 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
114 int64_t av_stream_get_end_pts(const AVStream *st)
119 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
124 void av_format_inject_global_side_data(AVFormatContext *s)
127 s->internal->inject_global_side_data = 1;
128 for (i = 0; i < s->nb_streams; i++) {
129 AVStream *st = s->streams[i];
130 st->inject_global_side_data = 1;
134 int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
136 av_assert0(!dst->codec_whitelist && !dst->format_whitelist);
137 dst-> codec_whitelist = av_strdup(src->codec_whitelist);
138 dst->format_whitelist = av_strdup(src->format_whitelist);
139 if ( (src-> codec_whitelist && !dst-> codec_whitelist)
140 || (src->format_whitelist && !dst->format_whitelist)) {
141 av_log(dst, AV_LOG_ERROR, "Failed to duplicate whitelist\n");
142 return AVERROR(ENOMEM);
147 static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
149 if (st->codec->codec)
150 return st->codec->codec;
152 switch (st->codec->codec_type) {
153 case AVMEDIA_TYPE_VIDEO:
154 if (s->video_codec) return s->video_codec;
156 case AVMEDIA_TYPE_AUDIO:
157 if (s->audio_codec) return s->audio_codec;
159 case AVMEDIA_TYPE_SUBTITLE:
160 if (s->subtitle_codec) return s->subtitle_codec;
164 return avcodec_find_decoder(codec_id);
167 int av_format_get_probe_score(const AVFormatContext *s)
169 return s->probe_score;
172 /* an arbitrarily chosen "sane" max packet size -- 50M */
173 #define SANE_CHUNK_SIZE (50000000)
175 int ffio_limit(AVIOContext *s, int size)
177 if (s->maxsize>= 0) {
178 int64_t remaining= s->maxsize - avio_tell(s);
179 if (remaining < size) {
180 int64_t newsize = avio_size(s);
181 if (!s->maxsize || s->maxsize<newsize)
182 s->maxsize = newsize - !newsize;
183 remaining= s->maxsize - avio_tell(s);
184 remaining= FFMAX(remaining, 0);
187 if (s->maxsize>= 0 && remaining+1 < size) {
188 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
195 /* Read the data in sane-sized chunks and append to pkt.
196 * Return the number of bytes read or an error. */
197 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
199 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
200 int orig_size = pkt->size;
204 int prev_size = pkt->size;
207 /* When the caller requests a lot of data, limit it to the amount
208 * left in file or SANE_CHUNK_SIZE when it is not known. */
210 if (read_size > SANE_CHUNK_SIZE/10) {
211 read_size = ffio_limit(s, read_size);
212 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
214 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
217 ret = av_grow_packet(pkt, read_size);
221 ret = avio_read(s, pkt->data + prev_size, read_size);
222 if (ret != read_size) {
223 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
230 pkt->flags |= AV_PKT_FLAG_CORRUPT;
235 return pkt->size > orig_size ? pkt->size - orig_size : ret;
238 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
243 pkt->pos = avio_tell(s);
245 return append_packet_chunked(s, pkt, size);
248 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
251 return av_get_packet(s, pkt, size);
252 return append_packet_chunked(s, pkt, size);
255 int av_filename_number_test(const char *filename)
259 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
262 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
265 static const struct {
268 enum AVMediaType type;
270 { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
271 { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
272 { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
273 { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
274 { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
275 { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
276 { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
277 { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
278 { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
279 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
283 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
285 if (fmt && st->request_probe <= score) {
287 av_log(s, AV_LOG_DEBUG,
288 "Probe with size=%d, packets=%d detected %s with score=%d\n",
289 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
291 for (i = 0; fmt_id_type[i].name; i++) {
292 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
293 st->codec->codec_id = fmt_id_type[i].id;
294 st->codec->codec_type = fmt_id_type[i].type;
302 /************************************************************/
303 /* input media file */
305 int av_demuxer_open(AVFormatContext *ic) {
308 if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) {
309 av_log(ic, AV_LOG_ERROR, "Format not on whitelist\n");
310 return AVERROR(EINVAL);
313 if (ic->iformat->read_header) {
314 err = ic->iformat->read_header(ic);
319 if (ic->pb && !ic->data_offset)
320 ic->data_offset = avio_tell(ic->pb);
325 /* Open input file and probe the format if necessary. */
326 static int init_input(AVFormatContext *s, const char *filename,
327 AVDictionary **options)
330 AVProbeData pd = { filename, NULL, 0 };
331 int score = AVPROBE_SCORE_RETRY;
334 s->flags |= AVFMT_FLAG_CUSTOM_IO;
336 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
337 s, 0, s->format_probesize);
338 else if (s->iformat->flags & AVFMT_NOFILE)
339 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
340 "will be ignored with AVFMT_NOFILE format.\n");
344 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
345 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
348 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
349 &s->interrupt_callback, options)) < 0)
353 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
354 s, 0, s->format_probesize);
357 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
358 AVPacketList **plast_pktl)
360 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
365 (*plast_pktl)->next = pktl;
367 *packet_buffer = pktl;
369 /* Add the packet in the buffered packet list. */
375 int avformat_queue_attached_pictures(AVFormatContext *s)
378 for (i = 0; i < s->nb_streams; i++)
379 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
380 s->streams[i]->discard < AVDISCARD_ALL) {
381 AVPacket copy = s->streams[i]->attached_pic;
382 if (copy.size <= 0) {
383 av_log(s, AV_LOG_WARNING,
384 "Attached picture on stream %d has invalid size, "
388 copy.buf = av_buffer_ref(copy.buf);
390 return AVERROR(ENOMEM);
392 add_to_pktbuf(&s->raw_packet_buffer, ©,
393 &s->raw_packet_buffer_end);
398 int avformat_open_input(AVFormatContext **ps, const char *filename,
399 AVInputFormat *fmt, AVDictionary **options)
401 AVFormatContext *s = *ps;
403 AVDictionary *tmp = NULL;
404 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
406 if (!s && !(s = avformat_alloc_context()))
407 return AVERROR(ENOMEM);
409 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
410 return AVERROR(EINVAL);
416 av_dict_copy(&tmp, *options, 0);
418 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
421 if ((ret = init_input(s, filename, &tmp)) < 0)
423 s->probe_score = ret;
425 if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
426 av_log(s, AV_LOG_ERROR, "Format not on whitelist\n");
427 ret = AVERROR(EINVAL);
431 avio_skip(s->pb, s->skip_initial_bytes);
433 /* Check filename in case an image number is expected. */
434 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
435 if (!av_filename_number_test(filename)) {
436 ret = AVERROR(EINVAL);
441 s->duration = s->start_time = AV_NOPTS_VALUE;
442 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
444 /* Allocate private data. */
445 if (s->iformat->priv_data_size > 0) {
446 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
447 ret = AVERROR(ENOMEM);
450 if (s->iformat->priv_class) {
451 *(const AVClass **) s->priv_data = s->iformat->priv_class;
452 av_opt_set_defaults(s->priv_data);
453 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
458 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
460 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0);
462 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
463 if ((ret = s->iformat->read_header(s)) < 0)
466 if (id3v2_extra_meta) {
467 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
468 !strcmp(s->iformat->name, "tta")) {
469 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
472 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
474 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
476 if ((ret = avformat_queue_attached_pictures(s)) < 0)
479 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
480 s->data_offset = avio_tell(s->pb);
482 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
485 av_dict_free(options);
492 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
494 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
496 avformat_free_context(s);
501 /*******************************************************/
503 static void force_codec_ids(AVFormatContext *s, AVStream *st)
505 switch (st->codec->codec_type) {
506 case AVMEDIA_TYPE_VIDEO:
507 if (s->video_codec_id)
508 st->codec->codec_id = s->video_codec_id;
510 case AVMEDIA_TYPE_AUDIO:
511 if (s->audio_codec_id)
512 st->codec->codec_id = s->audio_codec_id;
514 case AVMEDIA_TYPE_SUBTITLE:
515 if (s->subtitle_codec_id)
516 st->codec->codec_id = s->subtitle_codec_id;
521 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
523 if (st->request_probe>0) {
524 AVProbeData *pd = &st->probe_data;
526 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
530 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
532 av_log(s, AV_LOG_WARNING,
533 "Failed to reallocate probe buffer for stream %d\n",
538 memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
539 pd->buf_size += pkt->size;
540 memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
543 st->probe_packets = 0;
545 av_log(s, AV_LOG_WARNING,
546 "nothing to probe for stream %d\n", st->index);
550 end= s->raw_packet_buffer_remaining_size <= 0
551 || st->probe_packets<= 0;
553 if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
554 int score = set_codec_from_probe_data(s, st, pd);
555 if ( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY)
559 st->request_probe = -1;
560 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
561 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
563 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
565 force_codec_ids(s, st);
571 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
573 int64_t ref = pkt->dts;
574 int i, pts_wrap_behavior;
575 int64_t pts_wrap_reference;
576 AVProgram *first_program;
578 if (ref == AV_NOPTS_VALUE)
580 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
582 ref &= (1LL << st->pts_wrap_bits)-1;
584 // reference time stamp should be 60 s before first time stamp
585 pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
586 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
587 pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
588 (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
589 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
591 first_program = av_find_program_from_stream(s, NULL, stream_index);
593 if (!first_program) {
594 int default_stream_index = av_find_default_stream_index(s);
595 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
596 for (i = 0; i < s->nb_streams; i++) {
597 if (av_find_program_from_stream(s, NULL, i))
599 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
600 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
604 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
605 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
609 AVProgram *program = first_program;
611 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
612 pts_wrap_reference = program->pts_wrap_reference;
613 pts_wrap_behavior = program->pts_wrap_behavior;
616 program = av_find_program_from_stream(s, program, stream_index);
619 // update every program with differing pts_wrap_reference
620 program = first_program;
622 if (program->pts_wrap_reference != pts_wrap_reference) {
623 for (i = 0; i<program->nb_stream_indexes; i++) {
624 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
625 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
628 program->pts_wrap_reference = pts_wrap_reference;
629 program->pts_wrap_behavior = pts_wrap_behavior;
631 program = av_find_program_from_stream(s, program, stream_index);
637 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
643 AVPacketList *pktl = s->raw_packet_buffer;
647 st = s->streams[pkt->stream_index];
648 if (s->raw_packet_buffer_remaining_size <= 0)
649 if ((err = probe_codec(s, st, NULL)) < 0)
651 if (st->request_probe <= 0) {
652 s->raw_packet_buffer = pktl->next;
653 s->raw_packet_buffer_remaining_size += pkt->size;
662 ret = s->iformat->read_packet(s, pkt);
664 if (!pktl || ret == AVERROR(EAGAIN))
666 for (i = 0; i < s->nb_streams; i++) {
668 if (st->probe_packets)
669 if ((err = probe_codec(s, st, NULL)) < 0)
671 av_assert0(st->request_probe <= 0);
676 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
677 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
678 av_log(s, AV_LOG_WARNING,
679 "Dropped corrupted packet (stream = %d)\n",
685 if (pkt->stream_index >= (unsigned)s->nb_streams) {
686 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
690 st = s->streams[pkt->stream_index];
692 if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
693 // correct first time stamps to negative values
694 if (!is_relative(st->first_dts))
695 st->first_dts = wrap_timestamp(st, st->first_dts);
696 if (!is_relative(st->start_time))
697 st->start_time = wrap_timestamp(st, st->start_time);
698 if (!is_relative(st->cur_dts))
699 st->cur_dts = wrap_timestamp(st, st->cur_dts);
702 pkt->dts = wrap_timestamp(st, pkt->dts);
703 pkt->pts = wrap_timestamp(st, pkt->pts);
705 force_codec_ids(s, st);
707 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
708 if (s->use_wallclock_as_timestamps)
709 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
711 if (!pktl && st->request_probe <= 0)
714 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
715 s->raw_packet_buffer_remaining_size -= pkt->size;
717 if ((err = probe_codec(s, st, pkt)) < 0)
723 /**********************************************************/
725 static int determinable_frame_size(AVCodecContext *avctx)
727 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
728 avctx->codec_id == AV_CODEC_ID_MP1 ||
729 avctx->codec_id == AV_CODEC_ID_MP2 ||
730 avctx->codec_id == AV_CODEC_ID_MP3/* ||
731 avctx->codec_id == AV_CODEC_ID_CELT*/)
737 * Return the frame duration in seconds. Return 0 if not available.
739 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
740 AVCodecParserContext *pc, AVPacket *pkt)
742 AVRational codec_framerate = s->iformat ? st->codec->framerate :
743 av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
748 switch (st->codec->codec_type) {
749 case AVMEDIA_TYPE_VIDEO:
750 if (st->r_frame_rate.num && !pc && s->iformat) {
751 *pnum = st->r_frame_rate.den;
752 *pden = st->r_frame_rate.num;
753 } else if (st->time_base.num * 1000LL > st->time_base.den) {
754 *pnum = st->time_base.num;
755 *pden = st->time_base.den;
756 } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
757 av_assert0(st->codec->ticks_per_frame);
758 av_reduce(pnum, pden,
760 codec_framerate.num * (int64_t)st->codec->ticks_per_frame,
763 if (pc && pc->repeat_pict) {
764 av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
765 av_reduce(pnum, pden,
766 (*pnum) * (1LL + pc->repeat_pict),
770 /* If this codec can be interlaced or progressive then we need
771 * a parser to compute duration of a packet. Thus if we have
772 * no parser in such case leave duration undefined. */
773 if (st->codec->ticks_per_frame > 1 && !pc)
777 case AVMEDIA_TYPE_AUDIO:
778 frame_size = av_get_audio_frame_duration(st->codec, pkt->size);
779 if (frame_size <= 0 || st->codec->sample_rate <= 0)
782 *pden = st->codec->sample_rate;
789 static int is_intra_only(AVCodecContext *enc) {
790 const AVCodecDescriptor *desc;
792 if (enc->codec_type != AVMEDIA_TYPE_VIDEO)
795 desc = av_codec_get_codec_descriptor(enc);
797 desc = avcodec_descriptor_get(enc->codec_id);
798 av_codec_set_codec_descriptor(enc, desc);
801 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
805 static int has_decode_delay_been_guessed(AVStream *st)
807 if (st->codec->codec_id != AV_CODEC_ID_H264) return 1;
808 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
810 #if CONFIG_H264_DECODER
811 if (st->codec->has_b_frames &&
812 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
815 if (st->codec->has_b_frames<3)
816 return st->nb_decoded_frames >= 7;
817 else if (st->codec->has_b_frames<4)
818 return st->nb_decoded_frames >= 18;
820 return st->nb_decoded_frames >= 20;
823 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
827 if (pktl == s->packet_buffer_end)
828 return s->parse_queue;
832 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
833 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
834 st->codec->codec_id != AV_CODEC_ID_HEVC;
837 int delay = st->codec->has_b_frames;
840 if (dts == AV_NOPTS_VALUE) {
841 int64_t best_score = INT64_MAX;
842 for (i = 0; i<delay; i++) {
843 if (st->pts_reorder_error_count[i]) {
844 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
845 if (score < best_score) {
852 for (i = 0; i<delay; i++) {
853 if (pts_buffer[i] != AV_NOPTS_VALUE) {
854 int64_t diff = FFABS(pts_buffer[i] - dts)
855 + (uint64_t)st->pts_reorder_error[i];
856 diff = FFMAX(diff, st->pts_reorder_error[i]);
857 st->pts_reorder_error[i] = diff;
858 st->pts_reorder_error_count[i]++;
859 if (st->pts_reorder_error_count[i] > 250) {
860 st->pts_reorder_error[i] >>= 1;
861 st->pts_reorder_error_count[i] >>= 1;
868 if (dts == AV_NOPTS_VALUE)
874 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
875 int64_t dts, int64_t pts, AVPacket *pkt)
877 AVStream *st = s->streams[stream_index];
878 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
879 int64_t pts_buffer[MAX_REORDER_DELAY+1];
883 if (st->first_dts != AV_NOPTS_VALUE ||
884 dts == AV_NOPTS_VALUE ||
885 st->cur_dts == AV_NOPTS_VALUE ||
889 delay = st->codec->has_b_frames;
890 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
892 shift = st->first_dts - RELATIVE_TS_BASE;
894 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
895 pts_buffer[i] = AV_NOPTS_VALUE;
897 if (is_relative(pts))
900 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
901 if (pktl->pkt.stream_index != stream_index)
903 if (is_relative(pktl->pkt.pts))
904 pktl->pkt.pts += shift;
906 if (is_relative(pktl->pkt.dts))
907 pktl->pkt.dts += shift;
909 if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
910 st->start_time = pktl->pkt.pts;
912 if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
913 pts_buffer[0] = pktl->pkt.pts;
914 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
915 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
917 pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
921 if (st->start_time == AV_NOPTS_VALUE)
922 st->start_time = pts;
925 static void update_initial_durations(AVFormatContext *s, AVStream *st,
926 int stream_index, int duration)
928 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
929 int64_t cur_dts = RELATIVE_TS_BASE;
931 if (st->first_dts != AV_NOPTS_VALUE) {
932 if (st->update_initial_durations_done)
934 st->update_initial_durations_done = 1;
935 cur_dts = st->first_dts;
936 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
937 if (pktl->pkt.stream_index == stream_index) {
938 if (pktl->pkt.pts != pktl->pkt.dts ||
939 pktl->pkt.dts != AV_NOPTS_VALUE ||
945 if (pktl && pktl->pkt.dts != st->first_dts) {
946 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %d) in the queue\n",
947 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
951 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
954 pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
955 st->first_dts = cur_dts;
956 } else if (st->cur_dts != RELATIVE_TS_BASE)
959 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
960 if (pktl->pkt.stream_index != stream_index)
962 if (pktl->pkt.pts == pktl->pkt.dts &&
963 (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) &&
964 !pktl->pkt.duration) {
965 pktl->pkt.dts = cur_dts;
966 if (!st->codec->has_b_frames)
967 pktl->pkt.pts = cur_dts;
968 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
969 pktl->pkt.duration = duration;
972 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
975 st->cur_dts = cur_dts;
978 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
979 AVCodecParserContext *pc, AVPacket *pkt,
980 int64_t next_dts, int64_t next_pts)
982 int num, den, presentation_delayed, delay, i;
985 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
986 st->codec->codec_id != AV_CODEC_ID_HEVC;
988 if (s->flags & AVFMT_FLAG_NOFILLIN)
991 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
992 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
993 if (st->last_dts_for_order_check <= pkt->dts) {
996 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
997 "DTS %"PRIi64" < %"PRIi64" out of order\n",
999 st->last_dts_for_order_check);
1000 st->dts_misordered++;
1002 if (st->dts_ordered + st->dts_misordered > 250) {
1003 st->dts_ordered >>= 1;
1004 st->dts_misordered >>= 1;
1008 st->last_dts_for_order_check = pkt->dts;
1009 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1010 pkt->dts = AV_NOPTS_VALUE;
1013 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1014 pkt->dts = AV_NOPTS_VALUE;
1016 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1017 && !st->codec->has_b_frames)
1018 //FIXME Set low_delay = 0 when has_b_frames = 1
1019 st->codec->has_b_frames = 1;
1021 /* do we have a video B-frame ? */
1022 delay = st->codec->has_b_frames;
1023 presentation_delayed = 0;
1025 /* XXX: need has_b_frame, but cannot get it if the codec is
1026 * not initialized */
1028 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1029 presentation_delayed = 1;
1031 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1032 st->pts_wrap_bits < 63 &&
1033 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1034 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1035 pkt->dts -= 1LL << st->pts_wrap_bits;
1037 pkt->pts += 1LL << st->pts_wrap_bits;
1040 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1041 * We take the conservative approach and discard both.
1042 * Note: If this is misbehaving for an H.264 file, then possibly
1043 * presentation_delayed is not set correctly. */
1044 if (delay == 1 && pkt->dts == pkt->pts &&
1045 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1046 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1047 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1048 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1049 pkt->dts = AV_NOPTS_VALUE;
1052 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1053 if (pkt->duration == 0) {
1054 ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1056 duration = (AVRational) {num, den};
1057 pkt->duration = av_rescale_rnd(1,
1058 num * (int64_t) st->time_base.den,
1059 den * (int64_t) st->time_base.num,
1064 if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1065 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1067 /* Correct timestamps with byte offset if demuxers only have timestamps
1068 * on packet boundaries */
1069 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1070 /* this will estimate bitrate based on this frame's duration and size */
1071 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1072 if (pkt->pts != AV_NOPTS_VALUE)
1074 if (pkt->dts != AV_NOPTS_VALUE)
1078 /* This may be redundant, but it should not hurt. */
1079 if (pkt->dts != AV_NOPTS_VALUE &&
1080 pkt->pts != AV_NOPTS_VALUE &&
1081 pkt->pts > pkt->dts)
1082 presentation_delayed = 1;
1085 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d delay:%d onein_oneout:%d\n",
1086 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1087 pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1088 /* Interpolate PTS and DTS if they are not present. We skip H264
1089 * currently because delay and has_b_frames are not reliably set. */
1090 if ((delay == 0 || (delay == 1 && pc)) &&
1092 if (presentation_delayed) {
1093 /* DTS = decompression timestamp */
1094 /* PTS = presentation timestamp */
1095 if (pkt->dts == AV_NOPTS_VALUE)
1096 pkt->dts = st->last_IP_pts;
1097 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1098 if (pkt->dts == AV_NOPTS_VALUE)
1099 pkt->dts = st->cur_dts;
1101 /* This is tricky: the dts must be incremented by the duration
1102 * of the frame we are displaying, i.e. the last I- or P-frame. */
1103 if (st->last_IP_duration == 0)
1104 st->last_IP_duration = pkt->duration;
1105 if (pkt->dts != AV_NOPTS_VALUE)
1106 st->cur_dts = pkt->dts + st->last_IP_duration;
1107 if (pkt->dts != AV_NOPTS_VALUE &&
1108 pkt->pts == AV_NOPTS_VALUE &&
1109 st->last_IP_duration > 0 &&
1110 ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1111 next_dts != next_pts &&
1112 next_pts != AV_NOPTS_VALUE)
1113 pkt->pts = next_dts;
1115 st->last_IP_duration = pkt->duration;
1116 st->last_IP_pts = pkt->pts;
1117 /* Cannot compute PTS if not present (we can compute it only
1118 * by knowing the future. */
1119 } else if (pkt->pts != AV_NOPTS_VALUE ||
1120 pkt->dts != AV_NOPTS_VALUE ||
1123 /* presentation is not delayed : PTS and DTS are the same */
1124 if (pkt->pts == AV_NOPTS_VALUE)
1125 pkt->pts = pkt->dts;
1126 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1128 if (pkt->pts == AV_NOPTS_VALUE)
1129 pkt->pts = st->cur_dts;
1130 pkt->dts = pkt->pts;
1131 if (pkt->pts != AV_NOPTS_VALUE)
1132 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1136 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
1137 st->pts_buffer[0] = pkt->pts;
1138 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1139 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1141 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1143 // We skipped it above so we try here.
1145 // This should happen on the first packet
1146 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1147 if (pkt->dts > st->cur_dts)
1148 st->cur_dts = pkt->dts;
1150 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1151 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1154 if (is_intra_only(st->codec))
1155 pkt->flags |= AV_PKT_FLAG_KEY;
1157 pkt->convergence_duration = pc->convergence_duration;
1160 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1163 AVPacketList *pktl = *pkt_buf;
1164 *pkt_buf = pktl->next;
1165 av_free_packet(&pktl->pkt);
1168 *pkt_buf_end = NULL;
1172 * Parse a packet, add all split parts to parse_queue.
1174 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1176 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1178 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1179 AVStream *st = s->streams[stream_index];
1180 uint8_t *data = pkt ? pkt->data : NULL;
1181 int size = pkt ? pkt->size : 0;
1182 int ret = 0, got_output = 0;
1185 av_init_packet(&flush_pkt);
1188 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1189 // preserve 0-size sync packets
1190 compute_pkt_fields(s, st, st->parser, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1193 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1195 int64_t next_pts = pkt->pts;
1196 int64_t next_dts = pkt->dts;
1198 av_init_packet(&out_pkt);
1199 len = av_parser_parse2(st->parser, st->codec,
1200 &out_pkt.data, &out_pkt.size, data, size,
1201 pkt->pts, pkt->dts, pkt->pos);
1203 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1205 /* increment read pointer */
1209 got_output = !!out_pkt.size;
1214 if (pkt->side_data) {
1215 out_pkt.side_data = pkt->side_data;
1216 out_pkt.side_data_elems = pkt->side_data_elems;
1217 pkt->side_data = NULL;
1218 pkt->side_data_elems = 0;
1221 /* set the duration */
1222 out_pkt.duration = 0;
1223 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1224 if (st->codec->sample_rate > 0) {
1226 av_rescale_q_rnd(st->parser->duration,
1227 (AVRational) { 1, st->codec->sample_rate },
1233 out_pkt.stream_index = st->index;
1234 out_pkt.pts = st->parser->pts;
1235 out_pkt.dts = st->parser->dts;
1236 out_pkt.pos = st->parser->pos;
1238 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1239 out_pkt.pos = st->parser->frame_offset;
1241 if (st->parser->key_frame == 1 ||
1242 (st->parser->key_frame == -1 &&
1243 st->parser->pict_type == AV_PICTURE_TYPE_I))
1244 out_pkt.flags |= AV_PKT_FLAG_KEY;
1246 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1247 out_pkt.flags |= AV_PKT_FLAG_KEY;
1249 compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1251 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1252 out_pkt.buf = pkt->buf;
1254 #if FF_API_DESTRUCT_PACKET
1255 FF_DISABLE_DEPRECATION_WARNINGS
1256 out_pkt.destruct = pkt->destruct;
1257 pkt->destruct = NULL;
1258 FF_ENABLE_DEPRECATION_WARNINGS
1261 if ((ret = av_dup_packet(&out_pkt)) < 0)
1264 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1265 av_free_packet(&out_pkt);
1266 ret = AVERROR(ENOMEM);
1271 /* end of the stream => close and free the parser */
1272 if (pkt == &flush_pkt) {
1273 av_parser_close(st->parser);
1278 av_free_packet(pkt);
1282 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1283 AVPacketList **pkt_buffer_end,
1287 av_assert0(*pkt_buffer);
1290 *pkt_buffer = pktl->next;
1292 *pkt_buffer_end = NULL;
1297 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1299 return av_rescale(ts, st->time_base.num * st->codec->sample_rate, st->time_base.den);
1302 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1304 int ret = 0, i, got_packet = 0;
1305 AVDictionary *metadata = NULL;
1307 av_init_packet(pkt);
1309 while (!got_packet && !s->parse_queue) {
1313 /* read next packet */
1314 ret = ff_read_packet(s, &cur_pkt);
1316 if (ret == AVERROR(EAGAIN))
1318 /* flush the parsers */
1319 for (i = 0; i < s->nb_streams; i++) {
1321 if (st->parser && st->need_parsing)
1322 parse_packet(s, NULL, st->index);
1324 /* all remaining packets are now in parse_queue =>
1325 * really terminate parsing */
1329 st = s->streams[cur_pkt.stream_index];
1331 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1332 cur_pkt.dts != AV_NOPTS_VALUE &&
1333 cur_pkt.pts < cur_pkt.dts) {
1334 av_log(s, AV_LOG_WARNING,
1335 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1336 cur_pkt.stream_index,
1337 av_ts2str(cur_pkt.pts),
1338 av_ts2str(cur_pkt.dts),
1341 if (s->debug & FF_FDEBUG_TS)
1342 av_log(s, AV_LOG_DEBUG,
1343 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1344 cur_pkt.stream_index,
1345 av_ts2str(cur_pkt.pts),
1346 av_ts2str(cur_pkt.dts),
1347 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1349 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1350 st->parser = av_parser_init(st->codec->codec_id);
1352 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1353 "%s, packets or times may be invalid.\n",
1354 avcodec_get_name(st->codec->codec_id));
1355 /* no parser available: just output the raw packets */
1356 st->need_parsing = AVSTREAM_PARSE_NONE;
1357 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1358 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1359 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1360 st->parser->flags |= PARSER_FLAG_ONCE;
1361 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1362 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1365 if (!st->need_parsing || !st->parser) {
1366 /* no parsing needed: we just output the packet as is */
1368 compute_pkt_fields(s, st, NULL, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1369 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1370 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1371 ff_reduce_index(s, st->index);
1372 av_add_index_entry(st, pkt->pos, pkt->dts,
1373 0, 0, AVINDEX_KEYFRAME);
1376 } else if (st->discard < AVDISCARD_ALL) {
1377 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1381 av_free_packet(&cur_pkt);
1383 if (pkt->flags & AV_PKT_FLAG_KEY)
1384 st->skip_to_keyframe = 0;
1385 if (st->skip_to_keyframe) {
1386 av_free_packet(&cur_pkt);
1394 if (!got_packet && s->parse_queue)
1395 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1398 AVStream *st = s->streams[pkt->stream_index];
1399 int discard_padding = 0;
1400 if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1401 int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1402 int64_t sample = ts_to_samples(st, pts);
1403 int duration = ts_to_samples(st, pkt->duration);
1404 int64_t end_sample = sample + duration;
1405 if (duration > 0 && end_sample >= st->first_discard_sample &&
1406 sample < st->last_discard_sample)
1407 discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1409 if (st->skip_samples || discard_padding) {
1410 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1412 AV_WL32(p, st->skip_samples);
1413 AV_WL32(p + 4, discard_padding);
1414 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1416 st->skip_samples = 0;
1419 if (st->inject_global_side_data) {
1420 for (i = 0; i < st->nb_side_data; i++) {
1421 AVPacketSideData *src_sd = &st->side_data[i];
1424 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1427 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1429 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1433 memcpy(dst_data, src_sd->data, src_sd->size);
1435 st->inject_global_side_data = 0;
1438 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1439 av_packet_merge_side_data(pkt);
1442 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1444 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1445 av_dict_copy(&s->metadata, metadata, 0);
1446 av_dict_free(&metadata);
1447 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1450 if (s->debug & FF_FDEBUG_TS)
1451 av_log(s, AV_LOG_DEBUG,
1452 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1453 "size=%d, duration=%d, flags=%d\n",
1455 av_ts2str(pkt->pts),
1456 av_ts2str(pkt->dts),
1457 pkt->size, pkt->duration, pkt->flags);
1462 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1464 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1470 ret = s->packet_buffer
1471 ? read_from_packet_buffer(&s->packet_buffer,
1472 &s->packet_buffer_end, pkt)
1473 : read_frame_internal(s, pkt);
1480 AVPacketList *pktl = s->packet_buffer;
1483 AVPacket *next_pkt = &pktl->pkt;
1485 if (next_pkt->dts != AV_NOPTS_VALUE) {
1486 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1487 // last dts seen for this stream. if any of packets following
1488 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1489 int64_t last_dts = next_pkt->dts;
1490 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1491 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1492 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1493 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1495 next_pkt->pts = pktl->pkt.dts;
1497 if (last_dts != AV_NOPTS_VALUE) {
1498 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1499 last_dts = pktl->pkt.dts;
1504 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1505 // Fixing the last reference frame had none pts issue (For MXF etc).
1506 // We only do this when
1508 // 2. we are not able to resolve a pts value for current packet.
1509 // 3. the packets for this stream at the end of the files had valid dts.
1510 next_pkt->pts = last_dts + next_pkt->duration;
1512 pktl = s->packet_buffer;
1515 /* read packet from packet buffer, if there is data */
1516 st = s->streams[next_pkt->stream_index];
1517 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1518 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1519 ret = read_from_packet_buffer(&s->packet_buffer,
1520 &s->packet_buffer_end, pkt);
1525 ret = read_frame_internal(s, pkt);
1527 if (pktl && ret != AVERROR(EAGAIN)) {
1534 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1535 &s->packet_buffer_end)) < 0)
1536 return AVERROR(ENOMEM);
1541 st = s->streams[pkt->stream_index];
1542 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1543 ff_reduce_index(s, st->index);
1544 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1547 if (is_relative(pkt->dts))
1548 pkt->dts -= RELATIVE_TS_BASE;
1549 if (is_relative(pkt->pts))
1550 pkt->pts -= RELATIVE_TS_BASE;
1555 /* XXX: suppress the packet queue */
1556 static void flush_packet_queue(AVFormatContext *s)
1558 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1559 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1560 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1562 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1565 /*******************************************************/
1568 int av_find_default_stream_index(AVFormatContext *s)
1572 int best_stream = 0;
1573 int best_score = -1;
1575 if (s->nb_streams <= 0)
1577 for (i = 0; i < s->nb_streams; i++) {
1580 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1581 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1582 if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames)
1587 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1588 if (!st->codec->sample_rate && !st->codec_info_nb_frames)
1594 if (score > best_score) {
1602 /** Flush the frame reader. */
1603 void ff_read_frame_flush(AVFormatContext *s)
1608 flush_packet_queue(s);
1610 /* Reset read state for each stream. */
1611 for (i = 0; i < s->nb_streams; i++) {
1615 av_parser_close(st->parser);
1618 st->last_IP_pts = AV_NOPTS_VALUE;
1619 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1620 if (st->first_dts == AV_NOPTS_VALUE)
1621 st->cur_dts = RELATIVE_TS_BASE;
1623 /* We set the current DTS to an unspecified origin. */
1624 st->cur_dts = AV_NOPTS_VALUE;
1626 st->probe_packets = MAX_PROBE_PACKETS;
1628 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1629 st->pts_buffer[j] = AV_NOPTS_VALUE;
1631 if (s->internal->inject_global_side_data)
1632 st->inject_global_side_data = 1;
1636 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1640 for (i = 0; i < s->nb_streams; i++) {
1641 AVStream *st = s->streams[i];
1644 av_rescale(timestamp,
1645 st->time_base.den * (int64_t) ref_st->time_base.num,
1646 st->time_base.num * (int64_t) ref_st->time_base.den);
1650 void ff_reduce_index(AVFormatContext *s, int stream_index)
1652 AVStream *st = s->streams[stream_index];
1653 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1655 if ((unsigned) st->nb_index_entries >= max_entries) {
1657 for (i = 0; 2 * i < st->nb_index_entries; i++)
1658 st->index_entries[i] = st->index_entries[2 * i];
1659 st->nb_index_entries = i;
1663 int ff_add_index_entry(AVIndexEntry **index_entries,
1664 int *nb_index_entries,
1665 unsigned int *index_entries_allocated_size,
1666 int64_t pos, int64_t timestamp,
1667 int size, int distance, int flags)
1669 AVIndexEntry *entries, *ie;
1672 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1675 if (timestamp == AV_NOPTS_VALUE)
1676 return AVERROR(EINVAL);
1678 if (size < 0 || size > 0x3FFFFFFF)
1679 return AVERROR(EINVAL);
1681 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1682 timestamp -= RELATIVE_TS_BASE;
1684 entries = av_fast_realloc(*index_entries,
1685 index_entries_allocated_size,
1686 (*nb_index_entries + 1) *
1687 sizeof(AVIndexEntry));
1691 *index_entries = entries;
1693 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1694 timestamp, AVSEEK_FLAG_ANY);
1697 index = (*nb_index_entries)++;
1698 ie = &entries[index];
1699 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1701 ie = &entries[index];
1702 if (ie->timestamp != timestamp) {
1703 if (ie->timestamp <= timestamp)
1705 memmove(entries + index + 1, entries + index,
1706 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1707 (*nb_index_entries)++;
1708 } else if (ie->pos == pos && distance < ie->min_distance)
1709 // do not reduce the distance
1710 distance = ie->min_distance;
1714 ie->timestamp = timestamp;
1715 ie->min_distance = distance;
1722 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1723 int size, int distance, int flags)
1725 timestamp = wrap_timestamp(st, timestamp);
1726 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1727 &st->index_entries_allocated_size, pos,
1728 timestamp, size, distance, flags);
1731 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1732 int64_t wanted_timestamp, int flags)
1740 // Optimize appending index entries at the end.
1741 if (b && entries[b - 1].timestamp < wanted_timestamp)
1746 timestamp = entries[m].timestamp;
1747 if (timestamp >= wanted_timestamp)
1749 if (timestamp <= wanted_timestamp)
1752 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1754 if (!(flags & AVSEEK_FLAG_ANY))
1755 while (m >= 0 && m < nb_entries &&
1756 !(entries[m].flags & AVINDEX_KEYFRAME))
1757 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1759 if (m == nb_entries)
1764 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1766 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1767 wanted_timestamp, flags);
1770 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1771 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1773 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1774 if (stream_index >= 0)
1775 ts = wrap_timestamp(s->streams[stream_index], ts);
1779 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1780 int64_t target_ts, int flags)
1782 AVInputFormat *avif = s->iformat;
1783 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1784 int64_t ts_min, ts_max, ts;
1789 if (stream_index < 0)
1792 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1795 ts_min = AV_NOPTS_VALUE;
1796 pos_limit = -1; // GCC falsely says it may be uninitialized.
1798 st = s->streams[stream_index];
1799 if (st->index_entries) {
1802 /* FIXME: Whole function must be checked for non-keyframe entries in
1803 * index case, especially read_timestamp(). */
1804 index = av_index_search_timestamp(st, target_ts,
1805 flags | AVSEEK_FLAG_BACKWARD);
1806 index = FFMAX(index, 0);
1807 e = &st->index_entries[index];
1809 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1811 ts_min = e->timestamp;
1812 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1813 pos_min, av_ts2str(ts_min));
1815 av_assert1(index == 0);
1818 index = av_index_search_timestamp(st, target_ts,
1819 flags & ~AVSEEK_FLAG_BACKWARD);
1820 av_assert0(index < st->nb_index_entries);
1822 e = &st->index_entries[index];
1823 av_assert1(e->timestamp >= target_ts);
1825 ts_max = e->timestamp;
1826 pos_limit = pos_max - e->min_distance;
1827 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1828 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1832 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1833 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1838 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1841 ff_read_frame_flush(s);
1842 ff_update_cur_dts(s, st, ts);
1847 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1848 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1850 int64_t step = 1024;
1851 int64_t limit, ts_max;
1852 int64_t filesize = avio_size(s->pb);
1853 int64_t pos_max = filesize - 1;
1856 pos_max = FFMAX(0, (pos_max) - step);
1857 ts_max = ff_read_timestamp(s, stream_index,
1858 &pos_max, limit, read_timestamp);
1860 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1861 if (ts_max == AV_NOPTS_VALUE)
1865 int64_t tmp_pos = pos_max + 1;
1866 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1867 &tmp_pos, INT64_MAX, read_timestamp);
1868 if (tmp_ts == AV_NOPTS_VALUE)
1870 av_assert0(tmp_pos > pos_max);
1873 if (tmp_pos >= filesize)
1885 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1886 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1887 int64_t ts_min, int64_t ts_max,
1888 int flags, int64_t *ts_ret,
1889 int64_t (*read_timestamp)(struct AVFormatContext *, int,
1890 int64_t *, int64_t))
1897 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1899 if (ts_min == AV_NOPTS_VALUE) {
1900 pos_min = s->data_offset;
1901 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1902 if (ts_min == AV_NOPTS_VALUE)
1906 if (ts_min >= target_ts) {
1911 if (ts_max == AV_NOPTS_VALUE) {
1912 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
1914 pos_limit = pos_max;
1917 if (ts_max <= target_ts) {
1922 av_assert0(ts_min < ts_max);
1925 while (pos_min < pos_limit) {
1927 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1928 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1929 av_assert0(pos_limit <= pos_max);
1931 if (no_change == 0) {
1932 int64_t approximate_keyframe_distance = pos_max - pos_limit;
1933 // interpolate position (better than dichotomy)
1934 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
1936 pos_min - approximate_keyframe_distance;
1937 } else if (no_change == 1) {
1938 // bisection if interpolation did not change min / max pos last time
1939 pos = (pos_min + pos_limit) >> 1;
1941 /* linear search if bisection failed, can only happen if there
1942 * are very few or no keyframes between min/max */
1947 else if (pos > pos_limit)
1951 // May pass pos_limit instead of -1.
1952 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
1957 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
1958 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1959 pos_min, pos, pos_max,
1960 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1961 pos_limit, start_pos, no_change);
1962 if (ts == AV_NOPTS_VALUE) {
1963 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1966 if (target_ts <= ts) {
1967 pos_limit = start_pos - 1;
1971 if (target_ts >= ts) {
1977 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1978 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1981 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1983 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1984 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1985 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1991 static int seek_frame_byte(AVFormatContext *s, int stream_index,
1992 int64_t pos, int flags)
1994 int64_t pos_min, pos_max;
1996 pos_min = s->data_offset;
1997 pos_max = avio_size(s->pb) - 1;
2001 else if (pos > pos_max)
2004 avio_seek(s->pb, pos, SEEK_SET);
2006 s->io_repositioned = 1;
2011 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2012 int64_t timestamp, int flags)
2019 st = s->streams[stream_index];
2021 index = av_index_search_timestamp(st, timestamp, flags);
2023 if (index < 0 && st->nb_index_entries &&
2024 timestamp < st->index_entries[0].timestamp)
2027 if (index < 0 || index == st->nb_index_entries - 1) {
2031 if (st->nb_index_entries) {
2032 av_assert0(st->index_entries);
2033 ie = &st->index_entries[st->nb_index_entries - 1];
2034 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2036 ff_update_cur_dts(s, st, ie->timestamp);
2038 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
2044 read_status = av_read_frame(s, &pkt);
2045 } while (read_status == AVERROR(EAGAIN));
2046 if (read_status < 0)
2048 av_free_packet(&pkt);
2049 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2050 if (pkt.flags & AV_PKT_FLAG_KEY)
2052 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2053 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);
2058 index = av_index_search_timestamp(st, timestamp, flags);
2063 ff_read_frame_flush(s);
2064 if (s->iformat->read_seek)
2065 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2067 ie = &st->index_entries[index];
2068 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2070 ff_update_cur_dts(s, st, ie->timestamp);
2075 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2076 int64_t timestamp, int flags)
2081 if (flags & AVSEEK_FLAG_BYTE) {
2082 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2084 ff_read_frame_flush(s);
2085 return seek_frame_byte(s, stream_index, timestamp, flags);
2088 if (stream_index < 0) {
2089 stream_index = av_find_default_stream_index(s);
2090 if (stream_index < 0)
2093 st = s->streams[stream_index];
2094 /* timestamp for default must be expressed in AV_TIME_BASE units */
2095 timestamp = av_rescale(timestamp, st->time_base.den,
2096 AV_TIME_BASE * (int64_t) st->time_base.num);
2099 /* first, we try the format specific seek */
2100 if (s->iformat->read_seek) {
2101 ff_read_frame_flush(s);
2102 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2108 if (s->iformat->read_timestamp &&
2109 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2110 ff_read_frame_flush(s);
2111 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2112 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2113 ff_read_frame_flush(s);
2114 return seek_frame_generic(s, stream_index, timestamp, flags);
2119 int av_seek_frame(AVFormatContext *s, int stream_index,
2120 int64_t timestamp, int flags)
2124 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2125 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2126 if ((flags & AVSEEK_FLAG_BACKWARD))
2130 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2131 flags & ~AVSEEK_FLAG_BACKWARD);
2134 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2137 ret = avformat_queue_attached_pictures(s);
2142 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2143 int64_t ts, int64_t max_ts, int flags)
2145 if (min_ts > ts || max_ts < ts)
2147 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2148 return AVERROR(EINVAL);
2151 flags |= AVSEEK_FLAG_ANY;
2152 flags &= ~AVSEEK_FLAG_BACKWARD;
2154 if (s->iformat->read_seek2) {
2156 ff_read_frame_flush(s);
2158 if (stream_index == -1 && s->nb_streams == 1) {
2159 AVRational time_base = s->streams[0]->time_base;
2160 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2161 min_ts = av_rescale_rnd(min_ts, time_base.den,
2162 time_base.num * (int64_t)AV_TIME_BASE,
2163 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2164 max_ts = av_rescale_rnd(max_ts, time_base.den,
2165 time_base.num * (int64_t)AV_TIME_BASE,
2166 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2169 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2173 ret = avformat_queue_attached_pictures(s);
2177 if (s->iformat->read_timestamp) {
2178 // try to seek via read_timestamp()
2181 // Fall back on old API if new is not implemented but old is.
2182 // Note the old API has somewhat different semantics.
2183 if (s->iformat->read_seek || 1) {
2184 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2185 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2186 if (ret<0 && ts != min_ts && max_ts != ts) {
2187 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2189 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2194 // try some generic seek like seek_frame_generic() but with new ts semantics
2195 return -1; //unreachable
2198 /*******************************************************/
2201 * Return TRUE if the stream has accurate duration in any stream.
2203 * @return TRUE if the stream has accurate duration for at least one component.
2205 static int has_duration(AVFormatContext *ic)
2210 for (i = 0; i < ic->nb_streams; i++) {
2211 st = ic->streams[i];
2212 if (st->duration != AV_NOPTS_VALUE)
2215 if (ic->duration != AV_NOPTS_VALUE)
2221 * Estimate the stream timings from the one of each components.
2223 * Also computes the global bitrate if possible.
2225 static void update_stream_timings(AVFormatContext *ic)
2227 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2228 int64_t duration, duration1, filesize;
2233 start_time = INT64_MAX;
2234 start_time_text = INT64_MAX;
2235 end_time = INT64_MIN;
2236 duration = INT64_MIN;
2237 for (i = 0; i < ic->nb_streams; i++) {
2238 st = ic->streams[i];
2239 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2240 start_time1 = av_rescale_q(st->start_time, st->time_base,
2242 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2243 if (start_time1 < start_time_text)
2244 start_time_text = start_time1;
2246 start_time = FFMIN(start_time, start_time1);
2247 end_time1 = AV_NOPTS_VALUE;
2248 if (st->duration != AV_NOPTS_VALUE) {
2249 end_time1 = start_time1 +
2250 av_rescale_q(st->duration, st->time_base,
2252 end_time = FFMAX(end_time, end_time1);
2254 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2255 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2256 p->start_time = start_time1;
2257 if (p->end_time < end_time1)
2258 p->end_time = end_time1;
2261 if (st->duration != AV_NOPTS_VALUE) {
2262 duration1 = av_rescale_q(st->duration, st->time_base,
2264 duration = FFMAX(duration, duration1);
2267 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2268 start_time = start_time_text;
2269 else if (start_time > start_time_text)
2270 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2272 if (start_time != INT64_MAX) {
2273 ic->start_time = start_time;
2274 if (end_time != INT64_MIN) {
2275 if (ic->nb_programs) {
2276 for (i = 0; i < ic->nb_programs; i++) {
2277 p = ic->programs[i];
2278 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2279 duration = FFMAX(duration, p->end_time - p->start_time);
2282 duration = FFMAX(duration, end_time - start_time);
2285 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2286 ic->duration = duration;
2288 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2289 /* compute the bitrate */
2290 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2291 (double) ic->duration;
2292 if (bitrate >= 0 && bitrate <= INT_MAX)
2293 ic->bit_rate = bitrate;
2297 static void fill_all_stream_timings(AVFormatContext *ic)
2302 update_stream_timings(ic);
2303 for (i = 0; i < ic->nb_streams; i++) {
2304 st = ic->streams[i];
2305 if (st->start_time == AV_NOPTS_VALUE) {
2306 if (ic->start_time != AV_NOPTS_VALUE)
2307 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2309 if (ic->duration != AV_NOPTS_VALUE)
2310 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2316 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2318 int64_t filesize, duration;
2319 int i, show_warning = 0;
2322 /* if bit_rate is already set, we believe it */
2323 if (ic->bit_rate <= 0) {
2325 for (i = 0; i < ic->nb_streams; i++) {
2326 st = ic->streams[i];
2327 if (st->codec->bit_rate > 0) {
2328 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2332 bit_rate += st->codec->bit_rate;
2333 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2334 // If we have a videostream with packets but without a bitrate
2335 // then consider the sum not known
2340 ic->bit_rate = bit_rate;
2343 /* if duration is already set, we believe it */
2344 if (ic->duration == AV_NOPTS_VALUE &&
2345 ic->bit_rate != 0) {
2346 filesize = ic->pb ? avio_size(ic->pb) : 0;
2347 if (filesize > ic->data_offset) {
2348 filesize -= ic->data_offset;
2349 for (i = 0; i < ic->nb_streams; i++) {
2350 st = ic->streams[i];
2351 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2352 && st->duration == AV_NOPTS_VALUE) {
2353 duration = av_rescale(8 * filesize, st->time_base.den,
2355 (int64_t) st->time_base.num);
2356 st->duration = duration;
2363 av_log(ic, AV_LOG_WARNING,
2364 "Estimating duration from bitrate, this may be inaccurate\n");
2367 #define DURATION_MAX_READ_SIZE 250000LL
2368 #define DURATION_MAX_RETRY 4
2370 /* only usable for MPEG-PS streams */
2371 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2373 AVPacket pkt1, *pkt = &pkt1;
2375 int num, den, read_size, i, ret;
2376 int found_duration = 0;
2378 int64_t filesize, offset, duration;
2381 /* flush packet queue */
2382 flush_packet_queue(ic);
2384 for (i = 0; i < ic->nb_streams; i++) {
2385 st = ic->streams[i];
2386 if (st->start_time == AV_NOPTS_VALUE &&
2387 st->first_dts == AV_NOPTS_VALUE &&
2388 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2389 av_log(st->codec, AV_LOG_WARNING,
2390 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2393 av_parser_close(st->parser);
2398 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2399 /* estimate the end time (duration) */
2400 /* XXX: may need to support wrapping */
2401 filesize = ic->pb ? avio_size(ic->pb) : 0;
2403 is_end = found_duration;
2404 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2408 avio_seek(ic->pb, offset, SEEK_SET);
2411 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2415 ret = ff_read_packet(ic, pkt);
2416 } while (ret == AVERROR(EAGAIN));
2419 read_size += pkt->size;
2420 st = ic->streams[pkt->stream_index];
2421 if (pkt->pts != AV_NOPTS_VALUE &&
2422 (st->start_time != AV_NOPTS_VALUE ||
2423 st->first_dts != AV_NOPTS_VALUE)) {
2424 if (pkt->duration == 0) {
2425 ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2427 pkt->duration = av_rescale_rnd(1,
2428 num * (int64_t) st->time_base.den,
2429 den * (int64_t) st->time_base.num,
2433 duration = pkt->pts + pkt->duration;
2435 if (st->start_time != AV_NOPTS_VALUE)
2436 duration -= st->start_time;
2438 duration -= st->first_dts;
2440 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2441 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2442 st->duration = duration;
2443 st->info->last_duration = duration;
2446 av_free_packet(pkt);
2449 /* check if all audio/video streams have valid duration */
2452 for (i = 0; i < ic->nb_streams; i++) {
2453 st = ic->streams[i];
2454 switch (st->codec->codec_type) {
2455 case AVMEDIA_TYPE_VIDEO:
2456 case AVMEDIA_TYPE_AUDIO:
2457 if (st->duration == AV_NOPTS_VALUE)
2464 ++retry <= DURATION_MAX_RETRY);
2466 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2468 /* warn about audio/video streams which duration could not be estimated */
2469 for (i = 0; i < ic->nb_streams; i++) {
2470 st = ic->streams[i];
2471 if (st->duration == AV_NOPTS_VALUE) {
2472 switch (st->codec->codec_type) {
2473 case AVMEDIA_TYPE_VIDEO:
2474 case AVMEDIA_TYPE_AUDIO:
2475 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2476 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2478 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2482 fill_all_stream_timings(ic);
2484 avio_seek(ic->pb, old_offset, SEEK_SET);
2485 for (i = 0; i < ic->nb_streams; i++) {
2488 st = ic->streams[i];
2489 st->cur_dts = st->first_dts;
2490 st->last_IP_pts = AV_NOPTS_VALUE;
2491 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2492 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2493 st->pts_buffer[j] = AV_NOPTS_VALUE;
2497 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2501 /* get the file size, if possible */
2502 if (ic->iformat->flags & AVFMT_NOFILE) {
2505 file_size = avio_size(ic->pb);
2506 file_size = FFMAX(0, file_size);
2509 if ((!strcmp(ic->iformat->name, "mpeg") ||
2510 !strcmp(ic->iformat->name, "mpegts")) &&
2511 file_size && ic->pb->seekable) {
2512 /* get accurate estimate from the PTSes */
2513 estimate_timings_from_pts(ic, old_offset);
2514 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2515 } else if (has_duration(ic)) {
2516 /* at least one component has timings - we use them for all
2518 fill_all_stream_timings(ic);
2519 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2521 /* less precise: use bitrate info */
2522 estimate_timings_from_bit_rate(ic);
2523 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2525 update_stream_timings(ic);
2529 AVStream av_unused *st;
2530 for (i = 0; i < ic->nb_streams; i++) {
2531 st = ic->streams[i];
2532 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2533 (double) st->start_time / AV_TIME_BASE,
2534 (double) st->duration / AV_TIME_BASE);
2537 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2538 (double) ic->start_time / AV_TIME_BASE,
2539 (double) ic->duration / AV_TIME_BASE,
2540 ic->bit_rate / 1000);
2544 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2546 AVCodecContext *avctx = st->codec;
2548 #define FAIL(errmsg) do { \
2550 *errmsg_ptr = errmsg; \
2554 if ( avctx->codec_id == AV_CODEC_ID_NONE
2555 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2556 FAIL("unknown codec");
2557 switch (avctx->codec_type) {
2558 case AVMEDIA_TYPE_AUDIO:
2559 if (!avctx->frame_size && determinable_frame_size(avctx))
2560 FAIL("unspecified frame size");
2561 if (st->info->found_decoder >= 0 &&
2562 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2563 FAIL("unspecified sample format");
2564 if (!avctx->sample_rate)
2565 FAIL("unspecified sample rate");
2566 if (!avctx->channels)
2567 FAIL("unspecified number of channels");
2568 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2569 FAIL("no decodable DTS frames");
2571 case AVMEDIA_TYPE_VIDEO:
2573 FAIL("unspecified size");
2574 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2575 FAIL("unspecified pixel format");
2576 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2577 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2578 FAIL("no frame in rv30/40 and no sar");
2580 case AVMEDIA_TYPE_SUBTITLE:
2581 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2582 FAIL("unspecified size");
2584 case AVMEDIA_TYPE_DATA:
2585 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2591 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2592 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2593 AVDictionary **options)
2595 const AVCodec *codec;
2596 int got_picture = 1, ret = 0;
2597 AVFrame *frame = av_frame_alloc();
2598 AVSubtitle subtitle;
2599 AVPacket pkt = *avpkt;
2602 return AVERROR(ENOMEM);
2604 if (!avcodec_is_open(st->codec) &&
2605 st->info->found_decoder <= 0 &&
2606 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2607 AVDictionary *thread_opt = NULL;
2609 codec = find_decoder(s, st, st->codec->codec_id);
2612 st->info->found_decoder = -st->codec->codec_id;
2617 /* Force thread count to 1 since the H.264 decoder will not extract
2618 * SPS and PPS to extradata during multi-threaded decoding. */
2619 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2620 if (s->codec_whitelist)
2621 av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
2622 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2624 av_dict_free(&thread_opt);
2626 st->info->found_decoder = -st->codec->codec_id;
2629 st->info->found_decoder = 1;
2630 } else if (!st->info->found_decoder)
2631 st->info->found_decoder = 1;
2633 if (st->info->found_decoder < 0) {
2638 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2640 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2641 (!st->codec_info_nb_frames &&
2642 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2644 switch (st->codec->codec_type) {
2645 case AVMEDIA_TYPE_VIDEO:
2646 ret = avcodec_decode_video2(st->codec, frame,
2647 &got_picture, &pkt);
2649 case AVMEDIA_TYPE_AUDIO:
2650 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2652 case AVMEDIA_TYPE_SUBTITLE:
2653 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2654 &got_picture, &pkt);
2662 st->nb_decoded_frames++;
2669 if (!pkt.data && !got_picture)
2673 av_frame_free(&frame);
2677 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2679 while (tags->id != AV_CODEC_ID_NONE) {
2687 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2690 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2691 if (tag == tags[i].tag)
2693 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2694 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2696 return AV_CODEC_ID_NONE;
2699 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2704 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2706 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2708 return AV_CODEC_ID_NONE;
2713 if (sflags & (1 << (bps - 1))) {
2716 return AV_CODEC_ID_PCM_S8;
2718 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2720 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2722 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2724 return AV_CODEC_ID_NONE;
2729 return AV_CODEC_ID_PCM_U8;
2731 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2733 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2735 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2737 return AV_CODEC_ID_NONE;
2743 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2746 if (!av_codec_get_tag2(tags, id, &tag))
2751 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2755 for (i = 0; tags && tags[i]; i++) {
2756 const AVCodecTag *codec_tags = tags[i];
2757 while (codec_tags->id != AV_CODEC_ID_NONE) {
2758 if (codec_tags->id == id) {
2759 *tag = codec_tags->tag;
2768 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2771 for (i = 0; tags && tags[i]; i++) {
2772 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2773 if (id != AV_CODEC_ID_NONE)
2776 return AV_CODEC_ID_NONE;
2779 static void compute_chapters_end(AVFormatContext *s)
2782 int64_t max_time = s->duration +
2783 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2785 for (i = 0; i < s->nb_chapters; i++)
2786 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2787 AVChapter *ch = s->chapters[i];
2788 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2792 for (j = 0; j < s->nb_chapters; j++) {
2793 AVChapter *ch1 = s->chapters[j];
2794 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2796 if (j != i && next_start > ch->start && next_start < end)
2799 ch->end = (end == INT64_MAX) ? ch->start : end;
2803 static int get_std_framerate(int i)
2806 return (i + 1) * 1001;
2810 return ((const int[]) { 40, 48, 50, 60, 80, 120, 240})[i] * 1001 * 12;
2814 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
2817 /* Is the time base unreliable?
2818 * This is a heuristic to balance between quick acceptance of the values in
2819 * the headers vs. some extra checks.
2820 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2821 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2822 * And there are "variable" fps files this needs to detect as well. */
2823 static int tb_unreliable(AVCodecContext *c)
2825 if (c->time_base.den >= 101L * c->time_base.num ||
2826 c->time_base.den < 5L * c->time_base.num ||
2827 // c->codec_tag == AV_RL32("DIVX") ||
2828 // c->codec_tag == AV_RL32("XVID") ||
2829 c->codec_tag == AV_RL32("mp4v") ||
2830 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2831 c->codec_id == AV_CODEC_ID_GIF ||
2832 c->codec_id == AV_CODEC_ID_H264)
2837 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2841 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2842 avctx->extradata_size = 0;
2843 return AVERROR(EINVAL);
2845 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2846 if (avctx->extradata) {
2847 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2848 avctx->extradata_size = size;
2851 avctx->extradata_size = 0;
2852 ret = AVERROR(ENOMEM);
2857 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
2859 int ret = ff_alloc_extradata(avctx, size);
2862 ret = avio_read(pb, avctx->extradata, size);
2864 av_freep(&avctx->extradata);
2865 avctx->extradata_size = 0;
2866 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
2867 return ret < 0 ? ret : AVERROR_INVALIDDATA;
2873 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
2876 int64_t last = st->info->last_dts;
2878 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
2879 && ts - (uint64_t)last < INT64_MAX) {
2880 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
2881 int64_t duration = ts - last;
2883 if (!st->info->duration_error)
2884 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2885 if (!st->info->duration_error)
2886 return AVERROR(ENOMEM);
2888 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2889 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2890 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2891 if (st->info->duration_error[0][1][i] < 1e10) {
2892 int framerate = get_std_framerate(i);
2893 double sdts = dts*framerate/(1001*12);
2894 for (j= 0; j<2; j++) {
2895 int64_t ticks = llrint(sdts+j*0.5);
2896 double error= sdts - ticks + j*0.5;
2897 st->info->duration_error[j][0][i] += error;
2898 st->info->duration_error[j][1][i] += error*error;
2902 st->info->duration_count++;
2903 st->info->rfps_duration_sum += duration;
2905 if (st->info->duration_count % 10 == 0) {
2906 int n = st->info->duration_count;
2907 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2908 if (st->info->duration_error[0][1][i] < 1e10) {
2909 double a0 = st->info->duration_error[0][0][i] / n;
2910 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
2911 double a1 = st->info->duration_error[1][0][i] / n;
2912 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
2913 if (error0 > 0.04 && error1 > 0.04) {
2914 st->info->duration_error[0][1][i] = 2e10;
2915 st->info->duration_error[1][1][i] = 2e10;
2921 // ignore the first 4 values, they might have some random jitter
2922 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
2923 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2925 if (ts != AV_NOPTS_VALUE)
2926 st->info->last_dts = ts;
2931 void ff_rfps_calculate(AVFormatContext *ic)
2935 for (i = 0; i < ic->nb_streams; i++) {
2936 AVStream *st = ic->streams[i];
2938 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
2940 // the check for tb_unreliable() is not completely correct, since this is not about handling
2941 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2942 // ipmovie.c produces.
2943 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)
2944 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);
2945 if (st->info->duration_count>1 && !st->r_frame_rate.num
2946 && tb_unreliable(st->codec)) {
2948 double best_error= 0.01;
2949 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
2951 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
2954 if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2956 if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2959 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
2962 for (k= 0; k<2; k++) {
2963 int n = st->info->duration_count;
2964 double a= st->info->duration_error[k][0][j] / n;
2965 double error= st->info->duration_error[k][1][j]/n - a*a;
2967 if (error < best_error && best_error> 0.000000001) {
2969 num = get_std_framerate(j);
2972 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2975 // do not increase frame rate by more than 1 % in order to match a standard rate.
2976 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
2977 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2979 if ( !st->avg_frame_rate.num
2980 && st->r_frame_rate.num && st->info->rfps_duration_sum
2981 && st->info->codec_info_duration <= 0
2982 && st->info->duration_count > 2
2983 && 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
2985 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
2986 st->avg_frame_rate = st->r_frame_rate;
2989 av_freep(&st->info->duration_error);
2990 st->info->last_dts = AV_NOPTS_VALUE;
2991 st->info->duration_count = 0;
2992 st->info->rfps_duration_sum = 0;
2996 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2998 int i, count, ret = 0, j;
3001 AVPacket pkt1, *pkt;
3002 int64_t old_offset = avio_tell(ic->pb);
3003 // new streams might appear, no options for those
3004 int orig_nb_streams = ic->nb_streams;
3006 int64_t max_analyze_duration = ic->max_analyze_duration2;
3007 int64_t max_stream_analyze_duration;
3008 int64_t probesize = ic->probesize2;
3010 if (!max_analyze_duration)
3011 max_analyze_duration = ic->max_analyze_duration;
3013 probesize = ic->probesize;
3014 flush_codecs = probesize > 0;
3016 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
3018 max_stream_analyze_duration = max_analyze_duration;
3019 if (!max_analyze_duration) {
3020 max_stream_analyze_duration =
3021 max_analyze_duration = 5*AV_TIME_BASE;
3022 if (!strcmp(ic->iformat->name, "flv"))
3023 max_stream_analyze_duration = 30*AV_TIME_BASE;
3027 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
3028 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
3030 for (i = 0; i < ic->nb_streams; i++) {
3031 const AVCodec *codec;
3032 AVDictionary *thread_opt = NULL;
3033 st = ic->streams[i];
3035 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3036 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3037 /* if (!st->time_base.num)
3039 if (!st->codec->time_base.num)
3040 st->codec->time_base = st->time_base;
3042 // only for the split stuff
3043 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
3044 st->parser = av_parser_init(st->codec->codec_id);
3046 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3047 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3048 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3049 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3051 } else if (st->need_parsing) {
3052 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3053 "%s, packets or times may be invalid.\n",
3054 avcodec_get_name(st->codec->codec_id));
3057 codec = find_decoder(ic, st, st->codec->codec_id);
3059 /* Force thread count to 1 since the H.264 decoder will not extract
3060 * SPS and PPS to extradata during multi-threaded decoding. */
3061 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3063 if (ic->codec_whitelist)
3064 av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0);
3066 /* Ensure that subtitle_header is properly set. */
3067 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3068 && codec && !st->codec->codec) {
3069 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3070 av_log(ic, AV_LOG_WARNING,
3071 "Failed to open codec in av_find_stream_info\n");
3074 // Try to just open decoders, in case this is enough to get parameters.
3075 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3076 if (codec && !st->codec->codec)
3077 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3078 av_log(ic, AV_LOG_WARNING,
3079 "Failed to open codec in av_find_stream_info\n");
3082 av_dict_free(&thread_opt);
3085 for (i = 0; i < ic->nb_streams; i++) {
3086 #if FF_API_R_FRAME_RATE
3087 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3089 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3090 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3096 int analyzed_all_streams;
3097 if (ff_check_interrupt(&ic->interrupt_callback)) {
3099 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3103 /* check if one codec still needs to be handled */
3104 for (i = 0; i < ic->nb_streams; i++) {
3105 int fps_analyze_framecount = 20;
3107 st = ic->streams[i];
3108 if (!has_codec_parameters(st, NULL))
3110 /* If the timebase is coarse (like the usual millisecond precision
3111 * of mkv), we need to analyze more frames to reliably arrive at
3112 * the correct fps. */
3113 if (av_q2d(st->time_base) > 0.0005)
3114 fps_analyze_framecount *= 2;
3115 if (!tb_unreliable(st->codec))
3116 fps_analyze_framecount = 0;
3117 if (ic->fps_probe_size >= 0)
3118 fps_analyze_framecount = ic->fps_probe_size;
3119 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3120 fps_analyze_framecount = 0;
3121 /* variable fps and no guess at the real fps */
3122 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3123 st->info->duration_count < fps_analyze_framecount &&
3124 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3126 if (st->parser && st->parser->parser->split &&
3127 !st->codec->extradata)
3129 if (st->first_dts == AV_NOPTS_VALUE &&
3130 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3131 st->codec_info_nb_frames < ic->max_ts_probe &&
3132 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3133 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3136 analyzed_all_streams = 0;
3137 if (i == ic->nb_streams) {
3138 analyzed_all_streams = 1;
3139 /* NOTE: If the format has no header, then we need to read some
3140 * packets to get most of the streams, so we cannot stop here. */
3141 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3142 /* If we found the info for all the codecs, we can stop. */
3144 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3149 /* We did not get all the codec info, but we read too much data. */
3150 if (read_size >= probesize) {
3152 av_log(ic, AV_LOG_DEBUG,
3153 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3154 for (i = 0; i < ic->nb_streams; i++)
3155 if (!ic->streams[i]->r_frame_rate.num &&
3156 ic->streams[i]->info->duration_count <= 1 &&
3157 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3158 strcmp(ic->iformat->name, "image2"))
3159 av_log(ic, AV_LOG_WARNING,
3160 "Stream #%d: not enough frames to estimate rate; "
3161 "consider increasing probesize\n", i);
3165 /* NOTE: A new stream can be added there if no header in file
3166 * (AVFMTCTX_NOHEADER). */
3167 ret = read_frame_internal(ic, &pkt1);
3168 if (ret == AVERROR(EAGAIN))
3176 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3177 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3179 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3180 &ic->packet_buffer_end);
3182 ret = AVERROR(ENOMEM);
3183 goto find_stream_info_err;
3185 if ((ret = av_dup_packet(pkt)) < 0)
3186 goto find_stream_info_err;
3189 st = ic->streams[pkt->stream_index];
3190 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3191 read_size += pkt->size;
3193 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3194 /* check for non-increasing dts */
3195 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3196 st->info->fps_last_dts >= pkt->dts) {
3197 av_log(ic, AV_LOG_DEBUG,
3198 "Non-increasing DTS in stream %d: packet %d with DTS "
3199 "%"PRId64", packet %d with DTS %"PRId64"\n",
3200 st->index, st->info->fps_last_dts_idx,
3201 st->info->fps_last_dts, st->codec_info_nb_frames,
3203 st->info->fps_first_dts =
3204 st->info->fps_last_dts = AV_NOPTS_VALUE;
3206 /* Check for a discontinuity in dts. If the difference in dts
3207 * is more than 1000 times the average packet duration in the
3208 * sequence, we treat it as a discontinuity. */
3209 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3210 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3211 (pkt->dts - st->info->fps_last_dts) / 1000 >
3212 (st->info->fps_last_dts - st->info->fps_first_dts) /
3213 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3214 av_log(ic, AV_LOG_WARNING,
3215 "DTS discontinuity in stream %d: packet %d with DTS "
3216 "%"PRId64", packet %d with DTS %"PRId64"\n",
3217 st->index, st->info->fps_last_dts_idx,
3218 st->info->fps_last_dts, st->codec_info_nb_frames,
3220 st->info->fps_first_dts =
3221 st->info->fps_last_dts = AV_NOPTS_VALUE;
3224 /* update stored dts values */
3225 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3226 st->info->fps_first_dts = pkt->dts;
3227 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3229 st->info->fps_last_dts = pkt->dts;
3230 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3232 if (st->codec_info_nb_frames>1) {
3235 if (st->time_base.den > 0)
3236 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3237 if (st->avg_frame_rate.num > 0)
3238 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3241 && st->codec_info_nb_frames>30
3242 && st->info->fps_first_dts != AV_NOPTS_VALUE
3243 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3244 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3246 if (t >= (analyzed_all_streams ? max_analyze_duration : max_stream_analyze_duration)) {
3247 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n",
3248 max_analyze_duration,
3250 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3251 av_packet_unref(pkt);
3254 if (pkt->duration) {
3255 st->info->codec_info_duration += pkt->duration;
3256 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3259 #if FF_API_R_FRAME_RATE
3260 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3261 ff_rfps_add_frame(ic, st, pkt->dts);
3263 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3264 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3265 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3266 if (ff_alloc_extradata(st->codec, i))
3267 return AVERROR(ENOMEM);
3268 memcpy(st->codec->extradata, pkt->data,
3269 st->codec->extradata_size);
3273 /* If still no information, we try to open the codec and to
3274 * decompress the frame. We try to avoid that in most cases as
3275 * it takes longer and uses more memory. For MPEG-4, we need to
3276 * decompress for QuickTime.
3278 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3279 * least one frame of codec data, this makes sure the codec initializes
3280 * the channel configuration and does not only trust the values from
3282 try_decode_frame(ic, st, pkt,
3283 (options && i < orig_nb_streams) ? &options[i] : NULL);
3285 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3286 av_packet_unref(pkt);
3288 st->codec_info_nb_frames++;
3293 AVPacket empty_pkt = { 0 };
3295 av_init_packet(&empty_pkt);
3297 for (i = 0; i < ic->nb_streams; i++) {
3299 st = ic->streams[i];
3301 /* flush the decoders */
3302 if (st->info->found_decoder == 1) {
3304 err = try_decode_frame(ic, st, &empty_pkt,
3305 (options && i < orig_nb_streams)
3306 ? &options[i] : NULL);
3307 } while (err > 0 && !has_codec_parameters(st, NULL));
3310 av_log(ic, AV_LOG_INFO,
3311 "decoding for stream %d failed\n", st->index);
3317 // close codecs which were opened in try_decode_frame()
3318 for (i = 0; i < ic->nb_streams; i++) {
3319 st = ic->streams[i];
3320 avcodec_close(st->codec);
3323 ff_rfps_calculate(ic);
3325 for (i = 0; i < ic->nb_streams; i++) {
3326 st = ic->streams[i];
3327 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3328 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3329 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3330 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt)
3331 st->codec->codec_tag= tag;
3334 /* estimate average framerate if not set by demuxer */
3335 if (st->info->codec_info_duration_fields &&
3336 !st->avg_frame_rate.num &&
3337 st->info->codec_info_duration) {
3339 double best_error = 0.01;
3341 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3342 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3343 st->info->codec_info_duration < 0)
3345 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3346 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3347 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3349 /* Round guessed framerate to a "standard" framerate if it's
3350 * within 1% of the original estimate. */
3351 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3352 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3353 double error = fabs(av_q2d(st->avg_frame_rate) /
3354 av_q2d(std_fps) - 1);
3356 if (error < best_error) {
3358 best_fps = std_fps.num;
3362 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3363 best_fps, 12 * 1001, INT_MAX);
3366 if (!st->r_frame_rate.num) {
3367 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3368 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3369 st->r_frame_rate.num = st->codec->time_base.den;
3370 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3372 st->r_frame_rate.num = st->time_base.den;
3373 st->r_frame_rate.den = st->time_base.num;
3376 if (st->display_aspect_ratio.num && st->display_aspect_ratio.den) {
3377 AVRational hw_ratio = { st->codec->height, st->codec->width };
3378 st->sample_aspect_ratio = av_mul_q(st->display_aspect_ratio,
3381 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3382 if (!st->codec->bits_per_coded_sample)
3383 st->codec->bits_per_coded_sample =
3384 av_get_bits_per_sample(st->codec->codec_id);
3385 // set stream disposition based on audio service type
3386 switch (st->codec->audio_service_type) {
3387 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3388 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3390 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3391 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3393 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3394 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3396 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3397 st->disposition = AV_DISPOSITION_COMMENT;
3399 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3400 st->disposition = AV_DISPOSITION_KARAOKE;
3407 estimate_timings(ic, old_offset);
3409 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
3411 if (ret >= 0 && ic->nb_streams)
3412 /* We could not have all the codec parameters before EOF. */
3414 for (i = 0; i < ic->nb_streams; i++) {
3416 st = ic->streams[i];
3417 if (!has_codec_parameters(st, &errmsg)) {
3419 avcodec_string(buf, sizeof(buf), st->codec, 0);
3420 av_log(ic, AV_LOG_WARNING,
3421 "Could not find codec parameters for stream %d (%s): %s\n"
3422 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3429 compute_chapters_end(ic);
3431 find_stream_info_err:
3432 for (i = 0; i < ic->nb_streams; i++) {
3433 st = ic->streams[i];
3434 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3435 ic->streams[i]->codec->thread_count = 0;
3437 av_freep(&st->info->duration_error);
3438 av_freep(&ic->streams[i]->info);
3441 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3442 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3446 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3450 for (i = 0; i < ic->nb_programs; i++) {
3451 if (ic->programs[i] == last) {
3455 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3456 if (ic->programs[i]->stream_index[j] == s)
3457 return ic->programs[i];
3463 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3464 int wanted_stream_nb, int related_stream,
3465 AVCodec **decoder_ret, int flags)
3467 int i, nb_streams = ic->nb_streams;
3468 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3469 unsigned *program = NULL;
3470 const AVCodec *decoder = NULL, *best_decoder = NULL;
3472 if (related_stream >= 0 && wanted_stream_nb < 0) {
3473 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3475 program = p->stream_index;
3476 nb_streams = p->nb_stream_indexes;
3479 for (i = 0; i < nb_streams; i++) {
3480 int real_stream_index = program ? program[i] : i;
3481 AVStream *st = ic->streams[real_stream_index];
3482 AVCodecContext *avctx = st->codec;
3483 if (avctx->codec_type != type)
3485 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3487 if (wanted_stream_nb != real_stream_index &&
3488 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3489 AV_DISPOSITION_VISUAL_IMPAIRED))
3491 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3494 decoder = find_decoder(ic, st, st->codec->codec_id);
3497 ret = AVERROR_DECODER_NOT_FOUND;
3501 count = st->codec_info_nb_frames;
3502 bitrate = avctx->bit_rate;
3504 bitrate = avctx->rc_max_rate;
3505 multiframe = FFMIN(5, count);
3506 if ((best_multiframe > multiframe) ||
3507 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3508 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3511 best_bitrate = bitrate;
3512 best_multiframe = multiframe;
3513 ret = real_stream_index;
3514 best_decoder = decoder;
3515 if (program && i == nb_streams - 1 && ret < 0) {
3517 nb_streams = ic->nb_streams;
3518 /* no related stream found, try again with everything */
3523 *decoder_ret = (AVCodec*)best_decoder;
3527 /*******************************************************/
3529 int av_read_play(AVFormatContext *s)
3531 if (s->iformat->read_play)
3532 return s->iformat->read_play(s);
3534 return avio_pause(s->pb, 0);
3535 return AVERROR(ENOSYS);
3538 int av_read_pause(AVFormatContext *s)
3540 if (s->iformat->read_pause)
3541 return s->iformat->read_pause(s);
3543 return avio_pause(s->pb, 1);
3544 return AVERROR(ENOSYS);
3547 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3549 av_assert0(s->nb_streams>0);
3550 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3552 for (j = 0; j < st->nb_side_data; j++)
3553 av_freep(&st->side_data[j].data);
3554 av_freep(&st->side_data);
3555 st->nb_side_data = 0;
3558 av_parser_close(st->parser);
3560 if (st->attached_pic.data)
3561 av_free_packet(&st->attached_pic);
3562 av_dict_free(&st->metadata);
3563 av_freep(&st->probe_data.buf);
3564 av_freep(&st->index_entries);
3565 av_freep(&st->codec->extradata);
3566 av_freep(&st->codec->subtitle_header);
3567 av_freep(&st->codec);
3568 av_freep(&st->priv_data);
3570 av_freep(&st->info->duration_error);
3571 av_freep(&st->info);
3572 av_freep(&st->recommended_encoder_configuration);
3573 av_freep(&s->streams[ --s->nb_streams ]);
3576 void avformat_free_context(AVFormatContext *s)
3584 if (s->iformat && s->iformat->priv_class && s->priv_data)
3585 av_opt_free(s->priv_data);
3586 if (s->oformat && s->oformat->priv_class && s->priv_data)
3587 av_opt_free(s->priv_data);
3589 for (i = s->nb_streams - 1; i >= 0; i--) {
3590 ff_free_stream(s, s->streams[i]);
3592 for (i = s->nb_programs - 1; i >= 0; i--) {
3593 av_dict_free(&s->programs[i]->metadata);
3594 av_freep(&s->programs[i]->stream_index);
3595 av_freep(&s->programs[i]);
3597 av_freep(&s->programs);
3598 av_freep(&s->priv_data);
3599 while (s->nb_chapters--) {
3600 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3601 av_freep(&s->chapters[s->nb_chapters]);
3603 av_freep(&s->chapters);
3604 av_dict_free(&s->metadata);
3605 av_freep(&s->streams);
3606 av_freep(&s->internal);
3607 flush_packet_queue(s);
3611 void avformat_close_input(AVFormatContext **ps)
3622 if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) ||
3623 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3626 flush_packet_queue(s);
3629 if (s->iformat->read_close)
3630 s->iformat->read_close(s);
3632 avformat_free_context(s);
3639 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3645 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3647 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3650 s->streams = streams;
3652 st = av_mallocz(sizeof(AVStream));
3655 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3659 st->info->last_dts = AV_NOPTS_VALUE;
3661 st->codec = avcodec_alloc_context3(c);
3668 /* no default bitrate if decoding */
3669 st->codec->bit_rate = 0;
3671 /* default pts setting is MPEG-like */
3672 avpriv_set_pts_info(st, 33, 1, 90000);
3675 st->index = s->nb_streams;
3676 st->start_time = AV_NOPTS_VALUE;
3677 st->duration = AV_NOPTS_VALUE;
3678 /* we set the current DTS to 0 so that formats without any timestamps
3679 * but durations get some timestamps, formats with some unknown
3680 * timestamps have their first few packets buffered and the
3681 * timestamps corrected before they are returned to the user */
3682 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3683 st->first_dts = AV_NOPTS_VALUE;
3684 st->probe_packets = MAX_PROBE_PACKETS;
3685 st->pts_wrap_reference = AV_NOPTS_VALUE;
3686 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3688 st->last_IP_pts = AV_NOPTS_VALUE;
3689 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3690 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3691 st->pts_buffer[i] = AV_NOPTS_VALUE;
3693 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3695 #if FF_API_R_FRAME_RATE
3696 st->info->last_dts = AV_NOPTS_VALUE;
3698 st->info->fps_first_dts = AV_NOPTS_VALUE;
3699 st->info->fps_last_dts = AV_NOPTS_VALUE;
3701 st->inject_global_side_data = s->internal->inject_global_side_data;
3703 s->streams[s->nb_streams++] = st;
3707 AVProgram *av_new_program(AVFormatContext *ac, int id)
3709 AVProgram *program = NULL;
3712 av_dlog(ac, "new_program: id=0x%04x\n", id);
3714 for (i = 0; i < ac->nb_programs; i++)
3715 if (ac->programs[i]->id == id)
3716 program = ac->programs[i];
3719 program = av_mallocz(sizeof(AVProgram));
3722 dynarray_add(&ac->programs, &ac->nb_programs, program);
3723 program->discard = AVDISCARD_NONE;
3726 program->pts_wrap_reference = AV_NOPTS_VALUE;
3727 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3729 program->start_time =
3730 program->end_time = AV_NOPTS_VALUE;
3735 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3736 int64_t start, int64_t end, const char *title)
3738 AVChapter *chapter = NULL;
3741 if (end != AV_NOPTS_VALUE && start > end) {
3742 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
3746 for (i = 0; i < s->nb_chapters; i++)
3747 if (s->chapters[i]->id == id)
3748 chapter = s->chapters[i];
3751 chapter = av_mallocz(sizeof(AVChapter));
3754 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3756 av_dict_set(&chapter->metadata, "title", title, 0);
3758 chapter->time_base = time_base;
3759 chapter->start = start;
3765 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3768 AVProgram *program = NULL;
3771 if (idx >= ac->nb_streams) {
3772 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3776 for (i = 0; i < ac->nb_programs; i++) {
3777 if (ac->programs[i]->id != progid)
3779 program = ac->programs[i];
3780 for (j = 0; j < program->nb_stream_indexes; j++)
3781 if (program->stream_index[j] == idx)
3784 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3787 program->stream_index = tmp;
3788 program->stream_index[program->nb_stream_indexes++] = idx;
3793 uint64_t ff_ntp_time(void)
3795 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3798 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3801 char *q, buf1[20], c;
3802 int nd, len, percentd_found;
3814 while (av_isdigit(*p))
3815 nd = nd * 10 + *p++ - '0';
3817 } while (av_isdigit(c));
3826 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3828 if ((q - buf + len) > buf_size - 1)
3830 memcpy(q, buf1, len);
3838 if ((q - buf) < buf_size - 1)
3842 if (!percentd_found)
3851 void av_url_split(char *proto, int proto_size,
3852 char *authorization, int authorization_size,
3853 char *hostname, int hostname_size,
3854 int *port_ptr, char *path, int path_size, const char *url)
3856 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3862 if (authorization_size > 0)
3863 authorization[0] = 0;
3864 if (hostname_size > 0)
3869 /* parse protocol */
3870 if ((p = strchr(url, ':'))) {
3871 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3878 /* no protocol means plain filename */
3879 av_strlcpy(path, url, path_size);
3883 /* separate path from hostname */
3884 ls = strchr(p, '/');
3885 ls2 = strchr(p, '?');
3889 ls = FFMIN(ls, ls2);
3891 av_strlcpy(path, ls, path_size);
3893 ls = &p[strlen(p)]; // XXX
3895 /* the rest is hostname, use that to parse auth/port */
3897 /* authorization (user[:pass]@hostname) */
3899 while ((at = strchr(p, '@')) && at < ls) {
3900 av_strlcpy(authorization, at2,
3901 FFMIN(authorization_size, at + 1 - at2));
3902 p = at + 1; /* skip '@' */
3905 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3907 av_strlcpy(hostname, p + 1,
3908 FFMIN(hostname_size, brk - p));
3909 if (brk[1] == ':' && port_ptr)
3910 *port_ptr = atoi(brk + 2);
3911 } else if ((col = strchr(p, ':')) && col < ls) {
3912 av_strlcpy(hostname, p,
3913 FFMIN(col + 1 - p, hostname_size));
3915 *port_ptr = atoi(col + 1);
3917 av_strlcpy(hostname, p,
3918 FFMIN(ls + 1 - p, hostname_size));
3922 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3925 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3928 'C', 'D', 'E', 'F' };
3929 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3932 'c', 'd', 'e', 'f' };
3933 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3935 for (i = 0; i < s; i++) {
3936 buff[i * 2] = hex_table[src[i] >> 4];
3937 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3943 int ff_hex_to_data(uint8_t *data, const char *p)
3950 p += strspn(p, SPACE_CHARS);
3953 c = av_toupper((unsigned char) *p++);
3954 if (c >= '0' && c <= '9')
3956 else if (c >= 'A' && c <= 'F')
3971 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3972 unsigned int pts_num, unsigned int pts_den)
3975 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
3976 if (new_tb.num != pts_num)
3977 av_log(NULL, AV_LOG_DEBUG,
3978 "st:%d removing common factor %d from timebase\n",
3979 s->index, pts_num / new_tb.num);
3981 av_log(NULL, AV_LOG_WARNING,
3982 "st:%d has too large timebase, reducing\n", s->index);
3984 if (new_tb.num <= 0 || new_tb.den <= 0) {
3985 av_log(NULL, AV_LOG_ERROR,
3986 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
3987 new_tb.num, new_tb.den,
3991 s->time_base = new_tb;
3992 av_codec_set_pkt_timebase(s->codec, new_tb);
3993 s->pts_wrap_bits = pts_wrap_bits;
3996 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3999 const char *ptr = str;
4001 /* Parse key=value pairs. */
4004 char *dest = NULL, *dest_end;
4005 int key_len, dest_len = 0;
4007 /* Skip whitespace and potential commas. */
4008 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
4015 if (!(ptr = strchr(key, '=')))
4018 key_len = ptr - key;
4020 callback_get_buf(context, key, key_len, &dest, &dest_len);
4021 dest_end = dest + dest_len - 1;
4025 while (*ptr && *ptr != '\"') {
4029 if (dest && dest < dest_end)
4033 if (dest && dest < dest_end)
4041 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
4042 if (dest && dest < dest_end)
4050 int ff_find_stream_index(AVFormatContext *s, int id)
4053 for (i = 0; i < s->nb_streams; i++)
4054 if (s->streams[i]->id == id)
4059 int64_t ff_iso8601_to_unix_time(const char *datestr)
4061 struct tm time1 = { 0 }, time2 = { 0 };
4063 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4064 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4066 return av_timegm(&time2);
4068 return av_timegm(&time1);
4071 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
4075 if (ofmt->query_codec)
4076 return ofmt->query_codec(codec_id, std_compliance);
4077 else if (ofmt->codec_tag)
4078 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4079 else if (codec_id == ofmt->video_codec ||
4080 codec_id == ofmt->audio_codec ||
4081 codec_id == ofmt->subtitle_codec)
4084 return AVERROR_PATCHWELCOME;
4087 int avformat_network_init(void)
4091 ff_network_inited_globally = 1;
4092 if ((ret = ff_network_init()) < 0)
4099 int avformat_network_deinit(void)
4108 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4109 uint64_t channel_layout, int32_t sample_rate,
4110 int32_t width, int32_t height)
4116 return AVERROR(EINVAL);
4119 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4121 if (channel_layout) {
4123 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4127 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4129 if (width || height) {
4131 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4133 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4135 return AVERROR(ENOMEM);
4136 bytestream_put_le32(&data, flags);
4138 bytestream_put_le32(&data, channels);
4140 bytestream_put_le64(&data, channel_layout);
4142 bytestream_put_le32(&data, sample_rate);
4143 if (width || height) {
4144 bytestream_put_le32(&data, width);
4145 bytestream_put_le32(&data, height);
4150 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4152 AVRational undef = {0, 1};
4153 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4154 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4155 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4157 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4158 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4159 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4160 stream_sample_aspect_ratio = undef;