2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 #include "libavutil/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/dict.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/parseutils.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/time.h"
38 #include "libavutil/timestamp.h"
40 #include "libavcodec/bytestream.h"
41 #include "libavcodec/internal.h"
42 #include "libavcodec/raw.h"
44 #include "audiointerleave.h"
46 #include "avio_internal.h"
58 * various utility functions for use within FFmpeg
61 unsigned avformat_version(void)
63 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
64 return LIBAVFORMAT_VERSION_INT;
67 const char *avformat_configuration(void)
69 return FFMPEG_CONFIGURATION;
72 const char *avformat_license(void)
74 #define LICENSE_PREFIX "libavformat license: "
75 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
78 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
80 static int is_relative(int64_t ts) {
81 return ts > (RELATIVE_TS_BASE - (1LL<<48));
85 * Wrap a given time stamp, if there is an indication for an overflow
88 * @param timestamp the time stamp to wrap
89 * @return resulting time stamp
91 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
93 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
94 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
95 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
96 timestamp < st->pts_wrap_reference)
97 return timestamp + (1ULL << st->pts_wrap_bits);
98 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
99 timestamp >= st->pts_wrap_reference)
100 return timestamp - (1ULL << st->pts_wrap_bits);
105 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
106 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
107 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
108 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
109 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
110 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
111 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
113 void av_format_inject_global_side_data(AVFormatContext *s)
116 s->internal->inject_global_side_data = 1;
117 for (i = 0; i < s->nb_streams; i++) {
118 AVStream *st = s->streams[i];
119 st->inject_global_side_data = 1;
123 static AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
125 if (st->codec->codec)
126 return st->codec->codec;
128 switch (st->codec->codec_type) {
129 case AVMEDIA_TYPE_VIDEO:
130 if (s->video_codec) return s->video_codec;
132 case AVMEDIA_TYPE_AUDIO:
133 if (s->audio_codec) return s->audio_codec;
135 case AVMEDIA_TYPE_SUBTITLE:
136 if (s->subtitle_codec) return s->subtitle_codec;
140 return avcodec_find_decoder(codec_id);
143 int av_format_get_probe_score(const AVFormatContext *s)
145 return s->probe_score;
148 /* an arbitrarily chosen "sane" max packet size -- 50M */
149 #define SANE_CHUNK_SIZE (50000000)
151 int ffio_limit(AVIOContext *s, int size)
153 if (s->maxsize>= 0) {
154 int64_t remaining= s->maxsize - avio_tell(s);
155 if (remaining < size) {
156 int64_t newsize = avio_size(s);
157 if (!s->maxsize || s->maxsize<newsize)
158 s->maxsize = newsize - !newsize;
159 remaining= s->maxsize - avio_tell(s);
160 remaining= FFMAX(remaining, 0);
163 if (s->maxsize>= 0 && remaining+1 < size) {
164 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
171 /* Read the data in sane-sized chunks and append to pkt.
172 * Return the number of bytes read or an error. */
173 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
175 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
176 int orig_size = pkt->size;
180 int prev_size = pkt->size;
183 /* When the caller requests a lot of data, limit it to the amount
184 * left in file or SANE_CHUNK_SIZE when it is not known. */
186 if (read_size > SANE_CHUNK_SIZE/10) {
187 read_size = ffio_limit(s, read_size);
188 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
190 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
193 ret = av_grow_packet(pkt, read_size);
197 ret = avio_read(s, pkt->data + prev_size, read_size);
198 if (ret != read_size) {
199 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
206 pkt->flags |= AV_PKT_FLAG_CORRUPT;
211 return pkt->size > orig_size ? pkt->size - orig_size : ret;
214 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
219 pkt->pos = avio_tell(s);
221 return append_packet_chunked(s, pkt, size);
224 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
227 return av_get_packet(s, pkt, size);
228 return append_packet_chunked(s, pkt, size);
231 int av_filename_number_test(const char *filename)
235 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
238 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
241 AVProbeData lpd = *pd;
242 AVInputFormat *fmt1 = NULL, *fmt;
243 int score, nodat = 0, score_max = 0;
244 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
247 lpd.buf = zerobuffer;
249 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
250 int id3len = ff_id3v2_tag_len(lpd.buf);
251 if (lpd.buf_size > id3len + 16) {
253 lpd.buf_size -= id3len;
259 while ((fmt1 = av_iformat_next(fmt1))) {
260 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
263 if (fmt1->read_probe) {
264 score = fmt1->read_probe(&lpd);
265 if (fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
266 score = FFMAX(score, nodat ? AVPROBE_SCORE_EXTENSION / 2 - 1 : 1);
267 } else if (fmt1->extensions) {
268 if (av_match_ext(lpd.filename, fmt1->extensions))
269 score = AVPROBE_SCORE_EXTENSION;
271 if (score > score_max) {
274 } else if (score == score_max)
278 score_max = FFMIN(AVPROBE_SCORE_EXTENSION / 2 - 1, score_max);
279 *score_ret = score_max;
284 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
287 AVInputFormat *fmt = av_probe_input_format3(pd, is_opened, &score_ret);
288 if (score_ret > *score_max) {
289 *score_max = score_ret;
295 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
298 return av_probe_input_format2(pd, is_opened, &score);
301 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
304 static const struct {
307 enum AVMediaType type;
309 { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
310 { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
311 { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
312 { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
313 { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
314 { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
315 { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
316 { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
317 { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
318 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
322 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
324 if (fmt && st->request_probe <= score) {
326 av_log(s, AV_LOG_DEBUG,
327 "Probe with size=%d, packets=%d detected %s with score=%d\n",
328 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
330 for (i = 0; fmt_id_type[i].name; i++) {
331 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
332 st->codec->codec_id = fmt_id_type[i].id;
333 st->codec->codec_type = fmt_id_type[i].type;
341 /************************************************************/
342 /* input media file */
344 int av_demuxer_open(AVFormatContext *ic) {
347 if (ic->iformat->read_header) {
348 err = ic->iformat->read_header(ic);
353 if (ic->pb && !ic->data_offset)
354 ic->data_offset = avio_tell(ic->pb);
360 int av_probe_input_buffer2(AVIOContext *pb, AVInputFormat **fmt,
361 const char *filename, void *logctx,
362 unsigned int offset, unsigned int max_probe_size)
364 AVProbeData pd = { filename ? filename : "" };
367 int ret = 0, probe_size, buf_offset = 0;
371 max_probe_size = PROBE_BUF_MAX;
372 else if (max_probe_size > PROBE_BUF_MAX)
373 max_probe_size = PROBE_BUF_MAX;
374 else if (max_probe_size < PROBE_BUF_MIN) {
375 av_log(logctx, AV_LOG_ERROR,
376 "Specified probe size value %u cannot be < %u\n", max_probe_size, PROBE_BUF_MIN);
377 return AVERROR(EINVAL);
380 if (offset >= max_probe_size)
381 return AVERROR(EINVAL);
383 if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
384 if (!av_strcasecmp(mime_type, "audio/aacp")) {
385 *fmt = av_find_input_format("aac");
387 av_freep(&mime_type);
390 for (probe_size = PROBE_BUF_MIN; probe_size <= max_probe_size && !*fmt;
391 probe_size = FFMIN(probe_size << 1,
392 FFMAX(max_probe_size, probe_size + 1))) {
393 score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
395 /* Read probe data. */
396 if ((ret = av_reallocp(&buf, probe_size + AVPROBE_PADDING_SIZE)) < 0)
398 if ((ret = avio_read(pb, buf + buf_offset,
399 probe_size - buf_offset)) < 0) {
400 /* Fail if error was not end of file, otherwise, lower score. */
401 if (ret != AVERROR_EOF) {
406 ret = 0; /* error was end of file, nothing read */
409 if (buf_offset < offset)
411 pd.buf_size = buf_offset - offset;
412 pd.buf = &buf[offset];
414 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
416 /* Guess file format. */
417 *fmt = av_probe_input_format2(&pd, 1, &score);
419 /* This can only be true in the last iteration. */
420 if (score <= AVPROBE_SCORE_RETRY) {
421 av_log(logctx, AV_LOG_WARNING,
422 "Format %s detected only with low score of %d, "
423 "misdetection possible!\n", (*fmt)->name, score);
425 av_log(logctx, AV_LOG_DEBUG,
426 "Format %s probed with size=%d and score=%d\n",
427 (*fmt)->name, probe_size, score);
429 FILE *f = fopen("probestat.tmp", "ab");
430 fprintf(f, "probe_size:%d format:%s score:%d filename:%s\n", probe_size, (*fmt)->name, score, filename);
438 return AVERROR_INVALIDDATA;
441 /* Rewind. Reuse probe buffer to avoid seeking. */
442 ret = ffio_rewind_with_probe_data(pb, &buf, buf_offset);
444 return ret < 0 ? ret : score;
447 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
448 const char *filename, void *logctx,
449 unsigned int offset, unsigned int max_probe_size)
451 int ret = av_probe_input_buffer2(pb, fmt, filename, logctx, offset, max_probe_size);
452 return ret < 0 ? ret : 0;
455 /* Open input file and probe the format if necessary. */
456 static int init_input(AVFormatContext *s, const char *filename,
457 AVDictionary **options)
460 AVProbeData pd = { filename, NULL, 0 };
461 int score = AVPROBE_SCORE_RETRY;
464 s->flags |= AVFMT_FLAG_CUSTOM_IO;
466 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
468 else if (s->iformat->flags & AVFMT_NOFILE)
469 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
470 "will be ignored with AVFMT_NOFILE format.\n");
474 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
475 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
478 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
479 &s->interrupt_callback, options)) < 0)
483 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
487 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
488 AVPacketList **plast_pktl)
490 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
495 (*plast_pktl)->next = pktl;
497 *packet_buffer = pktl;
499 /* Add the packet in the buffered packet list. */
505 int avformat_queue_attached_pictures(AVFormatContext *s)
508 for (i = 0; i < s->nb_streams; i++)
509 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
510 s->streams[i]->discard < AVDISCARD_ALL) {
511 AVPacket copy = s->streams[i]->attached_pic;
512 copy.buf = av_buffer_ref(copy.buf);
514 return AVERROR(ENOMEM);
516 add_to_pktbuf(&s->raw_packet_buffer, ©,
517 &s->raw_packet_buffer_end);
522 int avformat_open_input(AVFormatContext **ps, const char *filename,
523 AVInputFormat *fmt, AVDictionary **options)
525 AVFormatContext *s = *ps;
527 AVDictionary *tmp = NULL;
528 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
530 if (!s && !(s = avformat_alloc_context()))
531 return AVERROR(ENOMEM);
533 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
534 return AVERROR(EINVAL);
540 av_dict_copy(&tmp, *options, 0);
542 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
545 if ((ret = init_input(s, filename, &tmp)) < 0)
547 s->probe_score = ret;
548 avio_skip(s->pb, s->skip_initial_bytes);
550 /* Check filename in case an image number is expected. */
551 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
552 if (!av_filename_number_test(filename)) {
553 ret = AVERROR(EINVAL);
558 s->duration = s->start_time = AV_NOPTS_VALUE;
559 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
561 /* Allocate private data. */
562 if (s->iformat->priv_data_size > 0) {
563 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
564 ret = AVERROR(ENOMEM);
567 if (s->iformat->priv_class) {
568 *(const AVClass **) s->priv_data = s->iformat->priv_class;
569 av_opt_set_defaults(s->priv_data);
570 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
575 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
577 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0);
579 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
580 if ((ret = s->iformat->read_header(s)) < 0)
583 if (id3v2_extra_meta) {
584 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
585 !strcmp(s->iformat->name, "tta")) {
586 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
589 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
591 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
593 if ((ret = avformat_queue_attached_pictures(s)) < 0)
596 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
597 s->data_offset = avio_tell(s->pb);
599 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
602 av_dict_free(options);
609 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
611 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
613 avformat_free_context(s);
618 /*******************************************************/
620 static void force_codec_ids(AVFormatContext *s, AVStream *st)
622 switch (st->codec->codec_type) {
623 case AVMEDIA_TYPE_VIDEO:
624 if (s->video_codec_id)
625 st->codec->codec_id = s->video_codec_id;
627 case AVMEDIA_TYPE_AUDIO:
628 if (s->audio_codec_id)
629 st->codec->codec_id = s->audio_codec_id;
631 case AVMEDIA_TYPE_SUBTITLE:
632 if (s->subtitle_codec_id)
633 st->codec->codec_id = s->subtitle_codec_id;
638 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
640 if (st->request_probe>0) {
641 AVProbeData *pd = &st->probe_data;
643 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
647 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
649 av_log(s, AV_LOG_WARNING,
650 "Failed to reallocate probe buffer for stream %d\n",
655 memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
656 pd->buf_size += pkt->size;
657 memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
660 st->probe_packets = 0;
662 av_log(s, AV_LOG_WARNING,
663 "nothing to probe for stream %d\n", st->index);
667 end= s->raw_packet_buffer_remaining_size <= 0
668 || st->probe_packets<= 0;
670 if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
671 int score = set_codec_from_probe_data(s, st, pd);
672 if ( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY)
676 st->request_probe = -1;
677 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
678 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
680 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
682 force_codec_ids(s, st);
688 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
690 int64_t ref = pkt->dts;
691 int i, pts_wrap_behavior;
692 int64_t pts_wrap_reference;
693 AVProgram *first_program;
695 if (ref == AV_NOPTS_VALUE)
697 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
699 ref &= (1LL << st->pts_wrap_bits)-1;
701 // reference time stamp should be 60 s before first time stamp
702 pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
703 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
704 pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
705 (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
706 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
708 first_program = av_find_program_from_stream(s, NULL, stream_index);
710 if (!first_program) {
711 int default_stream_index = av_find_default_stream_index(s);
712 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
713 for (i = 0; i < s->nb_streams; i++) {
714 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
715 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
719 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
720 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
724 AVProgram *program = first_program;
726 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
727 pts_wrap_reference = program->pts_wrap_reference;
728 pts_wrap_behavior = program->pts_wrap_behavior;
731 program = av_find_program_from_stream(s, program, stream_index);
734 // update every program with differing pts_wrap_reference
735 program = first_program;
737 if (program->pts_wrap_reference != pts_wrap_reference) {
738 for (i = 0; i<program->nb_stream_indexes; i++) {
739 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
740 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
743 program->pts_wrap_reference = pts_wrap_reference;
744 program->pts_wrap_behavior = pts_wrap_behavior;
746 program = av_find_program_from_stream(s, program, stream_index);
752 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
758 AVPacketList *pktl = s->raw_packet_buffer;
762 st = s->streams[pkt->stream_index];
763 if (s->raw_packet_buffer_remaining_size <= 0)
764 if ((err = probe_codec(s, st, NULL)) < 0)
766 if (st->request_probe <= 0) {
767 s->raw_packet_buffer = pktl->next;
768 s->raw_packet_buffer_remaining_size += pkt->size;
777 ret = s->iformat->read_packet(s, pkt);
779 if (!pktl || ret == AVERROR(EAGAIN))
781 for (i = 0; i < s->nb_streams; i++) {
783 if (st->probe_packets)
784 if ((err = probe_codec(s, st, NULL)) < 0)
786 av_assert0(st->request_probe <= 0);
791 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
792 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
793 av_log(s, AV_LOG_WARNING,
794 "Dropped corrupted packet (stream = %d)\n",
800 if (pkt->stream_index >= (unsigned)s->nb_streams) {
801 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
805 st = s->streams[pkt->stream_index];
807 if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
808 // correct first time stamps to negative values
809 if (!is_relative(st->first_dts))
810 st->first_dts = wrap_timestamp(st, st->first_dts);
811 if (!is_relative(st->start_time))
812 st->start_time = wrap_timestamp(st, st->start_time);
813 if (!is_relative(st->cur_dts))
814 st->cur_dts = wrap_timestamp(st, st->cur_dts);
817 pkt->dts = wrap_timestamp(st, pkt->dts);
818 pkt->pts = wrap_timestamp(st, pkt->pts);
820 force_codec_ids(s, st);
822 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
823 if (s->use_wallclock_as_timestamps)
824 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
826 if (!pktl && st->request_probe <= 0)
829 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
830 s->raw_packet_buffer_remaining_size -= pkt->size;
832 if ((err = probe_codec(s, st, pkt)) < 0)
837 #if FF_API_READ_PACKET
838 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
840 return ff_read_packet(s, pkt);
845 /**********************************************************/
847 static int determinable_frame_size(AVCodecContext *avctx)
849 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
850 avctx->codec_id == AV_CODEC_ID_MP1 ||
851 avctx->codec_id == AV_CODEC_ID_MP2 ||
852 avctx->codec_id == AV_CODEC_ID_MP3/* ||
853 avctx->codec_id == AV_CODEC_ID_CELT*/)
859 * Get the number of samples of an audio frame. Return -1 on error.
861 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
865 /* give frame_size priority if demuxing */
866 if (!mux && enc->frame_size > 1)
867 return enc->frame_size;
869 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
872 /* Fall back on using frame_size if muxing. */
873 if (enc->frame_size > 1)
874 return enc->frame_size;
876 //For WMA we currently have no other means to calculate duration thus we
877 //do it here by assuming CBR, which is true for all known cases.
878 if (!mux && enc->bit_rate>0 && size>0 && enc->sample_rate>0 && enc->block_align>1) {
879 if (enc->codec_id == AV_CODEC_ID_WMAV1 || enc->codec_id == AV_CODEC_ID_WMAV2)
880 return ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
887 * Return the frame duration in seconds. Return 0 if not available.
889 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
890 AVCodecParserContext *pc, AVPacket *pkt)
896 switch (st->codec->codec_type) {
897 case AVMEDIA_TYPE_VIDEO:
898 if (st->r_frame_rate.num && !pc) {
899 *pnum = st->r_frame_rate.den;
900 *pden = st->r_frame_rate.num;
901 } else if (st->time_base.num * 1000LL > st->time_base.den) {
902 *pnum = st->time_base.num;
903 *pden = st->time_base.den;
904 } else if (st->codec->time_base.num * 1000LL > st->codec->time_base.den) {
905 *pnum = st->codec->time_base.num;
906 *pden = st->codec->time_base.den;
907 if (pc && pc->repeat_pict) {
908 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
909 *pden /= 1 + pc->repeat_pict;
911 *pnum *= 1 + pc->repeat_pict;
913 /* If this codec can be interlaced or progressive then we need
914 * a parser to compute duration of a packet. Thus if we have
915 * no parser in such case leave duration undefined. */
916 if (st->codec->ticks_per_frame > 1 && !pc)
920 case AVMEDIA_TYPE_AUDIO:
921 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
922 if (frame_size <= 0 || st->codec->sample_rate <= 0)
925 *pden = st->codec->sample_rate;
932 static int is_intra_only(AVCodecContext *enc) {
933 const AVCodecDescriptor *desc;
935 if (enc->codec_type != AVMEDIA_TYPE_VIDEO)
938 desc = av_codec_get_codec_descriptor(enc);
940 desc = avcodec_descriptor_get(enc->codec_id);
941 av_codec_set_codec_descriptor(enc, desc);
944 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
948 static int has_decode_delay_been_guessed(AVStream *st)
950 if (st->codec->codec_id != AV_CODEC_ID_H264) return 1;
951 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
953 #if CONFIG_H264_DECODER
954 if (st->codec->has_b_frames &&
955 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
958 if (st->codec->has_b_frames<3)
959 return st->nb_decoded_frames >= 7;
960 else if (st->codec->has_b_frames<4)
961 return st->nb_decoded_frames >= 18;
963 return st->nb_decoded_frames >= 20;
966 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
970 if (pktl == s->packet_buffer_end)
971 return s->parse_queue;
975 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
976 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
977 st->codec->codec_id != AV_CODEC_ID_HEVC;
980 int delay = st->codec->has_b_frames;
983 if (dts == AV_NOPTS_VALUE) {
984 int64_t best_score = INT64_MAX;
985 for (i = 0; i<delay; i++) {
986 if (st->pts_reorder_error_count[i]) {
987 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
988 if (score < best_score) {
995 for (i = 0; i<delay; i++) {
996 if (pts_buffer[i] != AV_NOPTS_VALUE) {
997 int64_t diff = FFABS(pts_buffer[i] - dts)
998 + (uint64_t)st->pts_reorder_error[i];
999 diff = FFMAX(diff, st->pts_reorder_error[i]);
1000 st->pts_reorder_error[i] = diff;
1001 st->pts_reorder_error_count[i]++;
1002 if (st->pts_reorder_error_count[i] > 250) {
1003 st->pts_reorder_error[i] >>= 1;
1004 st->pts_reorder_error_count[i] >>= 1;
1011 if (dts == AV_NOPTS_VALUE)
1012 dts = pts_buffer[0];
1017 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
1018 int64_t dts, int64_t pts, AVPacket *pkt)
1020 AVStream *st = s->streams[stream_index];
1021 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
1022 int64_t pts_buffer[MAX_REORDER_DELAY+1];
1026 if (st->first_dts != AV_NOPTS_VALUE ||
1027 dts == AV_NOPTS_VALUE ||
1028 st->cur_dts == AV_NOPTS_VALUE ||
1032 delay = st->codec->has_b_frames;
1033 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
1035 shift = st->first_dts - RELATIVE_TS_BASE;
1037 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
1038 pts_buffer[i] = AV_NOPTS_VALUE;
1040 if (is_relative(pts))
1043 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1044 if (pktl->pkt.stream_index != stream_index)
1046 if (is_relative(pktl->pkt.pts))
1047 pktl->pkt.pts += shift;
1049 if (is_relative(pktl->pkt.dts))
1050 pktl->pkt.dts += shift;
1052 if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
1053 st->start_time = pktl->pkt.pts;
1055 if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
1056 pts_buffer[0] = pktl->pkt.pts;
1057 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
1058 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
1060 pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
1064 if (st->start_time == AV_NOPTS_VALUE)
1065 st->start_time = pts;
1068 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1069 int stream_index, int duration)
1071 AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
1072 int64_t cur_dts = RELATIVE_TS_BASE;
1074 if (st->first_dts != AV_NOPTS_VALUE) {
1075 if (st->update_initial_durations_done)
1077 st->update_initial_durations_done = 1;
1078 cur_dts = st->first_dts;
1079 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1080 if (pktl->pkt.stream_index == stream_index) {
1081 if (pktl->pkt.pts != pktl->pkt.dts ||
1082 pktl->pkt.dts != AV_NOPTS_VALUE ||
1085 cur_dts -= duration;
1088 if (pktl && pktl->pkt.dts != st->first_dts) {
1089 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %d) in the queue\n",
1090 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1094 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1097 pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue;
1098 st->first_dts = cur_dts;
1099 } else if (st->cur_dts != RELATIVE_TS_BASE)
1102 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1103 if (pktl->pkt.stream_index != stream_index)
1105 if (pktl->pkt.pts == pktl->pkt.dts &&
1106 (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) &&
1107 !pktl->pkt.duration) {
1108 pktl->pkt.dts = cur_dts;
1109 if (!st->codec->has_b_frames)
1110 pktl->pkt.pts = cur_dts;
1111 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1112 pktl->pkt.duration = duration;
1115 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1118 st->cur_dts = cur_dts;
1121 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1122 AVCodecParserContext *pc, AVPacket *pkt)
1124 int num, den, presentation_delayed, delay, i;
1126 AVRational duration;
1127 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
1128 st->codec->codec_id != AV_CODEC_ID_HEVC;
1130 if (s->flags & AVFMT_FLAG_NOFILLIN)
1133 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1134 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
1135 if (st->last_dts_for_order_check <= pkt->dts) {
1138 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
1139 "DTS %"PRIi64" < %"PRIi64" out of order\n",
1141 st->last_dts_for_order_check);
1142 st->dts_misordered++;
1144 if (st->dts_ordered + st->dts_misordered > 250) {
1145 st->dts_ordered >>= 1;
1146 st->dts_misordered >>= 1;
1150 st->last_dts_for_order_check = pkt->dts;
1151 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1152 pkt->dts = AV_NOPTS_VALUE;
1155 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1156 pkt->dts = AV_NOPTS_VALUE;
1158 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1159 && !st->codec->has_b_frames)
1160 //FIXME Set low_delay = 0 when has_b_frames = 1
1161 st->codec->has_b_frames = 1;
1163 /* do we have a video B-frame ? */
1164 delay = st->codec->has_b_frames;
1165 presentation_delayed = 0;
1167 /* XXX: need has_b_frame, but cannot get it if the codec is
1168 * not initialized */
1170 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1171 presentation_delayed = 1;
1173 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1174 st->pts_wrap_bits < 63 &&
1175 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1176 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1177 pkt->dts -= 1LL << st->pts_wrap_bits;
1179 pkt->pts += 1LL << st->pts_wrap_bits;
1182 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1183 * We take the conservative approach and discard both.
1184 * Note: If this is misbehaving for an H.264 file, then possibly
1185 * presentation_delayed is not set correctly. */
1186 if (delay == 1 && pkt->dts == pkt->pts &&
1187 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1188 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1189 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1190 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1191 pkt->dts = AV_NOPTS_VALUE;
1194 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1195 if (pkt->duration == 0) {
1196 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1198 duration = (AVRational) {num, den};
1199 pkt->duration = av_rescale_rnd(1,
1200 num * (int64_t) st->time_base.den,
1201 den * (int64_t) st->time_base.num,
1206 if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1207 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1209 /* Correct timestamps with byte offset if demuxers only have timestamps
1210 * on packet boundaries */
1211 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1212 /* this will estimate bitrate based on this frame's duration and size */
1213 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1214 if (pkt->pts != AV_NOPTS_VALUE)
1216 if (pkt->dts != AV_NOPTS_VALUE)
1220 /* This may be redundant, but it should not hurt. */
1221 if (pkt->dts != AV_NOPTS_VALUE &&
1222 pkt->pts != AV_NOPTS_VALUE &&
1223 pkt->pts > pkt->dts)
1224 presentation_delayed = 1;
1227 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1228 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1229 pkt->stream_index, pc, pkt->duration);
1230 /* Interpolate PTS and DTS if they are not present. We skip H264
1231 * currently because delay and has_b_frames are not reliably set. */
1232 if ((delay == 0 || (delay == 1 && pc)) &&
1234 if (presentation_delayed) {
1235 /* DTS = decompression timestamp */
1236 /* PTS = presentation timestamp */
1237 if (pkt->dts == AV_NOPTS_VALUE)
1238 pkt->dts = st->last_IP_pts;
1239 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1240 if (pkt->dts == AV_NOPTS_VALUE)
1241 pkt->dts = st->cur_dts;
1243 /* This is tricky: the dts must be incremented by the duration
1244 * of the frame we are displaying, i.e. the last I- or P-frame. */
1245 if (st->last_IP_duration == 0)
1246 st->last_IP_duration = pkt->duration;
1247 if (pkt->dts != AV_NOPTS_VALUE)
1248 st->cur_dts = pkt->dts + st->last_IP_duration;
1249 st->last_IP_duration = pkt->duration;
1250 st->last_IP_pts = pkt->pts;
1251 /* Cannot compute PTS if not present (we can compute it only
1252 * by knowing the future. */
1253 } else if (pkt->pts != AV_NOPTS_VALUE ||
1254 pkt->dts != AV_NOPTS_VALUE ||
1257 /* presentation is not delayed : PTS and DTS are the same */
1258 if (pkt->pts == AV_NOPTS_VALUE)
1259 pkt->pts = pkt->dts;
1260 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1262 if (pkt->pts == AV_NOPTS_VALUE)
1263 pkt->pts = st->cur_dts;
1264 pkt->dts = pkt->pts;
1265 if (pkt->pts != AV_NOPTS_VALUE)
1266 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1270 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
1271 st->pts_buffer[0] = pkt->pts;
1272 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1273 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1275 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1277 // We skipped it above so we try here.
1279 // This should happen on the first packet
1280 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1281 if (pkt->dts > st->cur_dts)
1282 st->cur_dts = pkt->dts;
1284 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1285 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1288 if (is_intra_only(st->codec))
1289 pkt->flags |= AV_PKT_FLAG_KEY;
1291 pkt->convergence_duration = pc->convergence_duration;
1294 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1297 AVPacketList *pktl = *pkt_buf;
1298 *pkt_buf = pktl->next;
1299 av_free_packet(&pktl->pkt);
1302 *pkt_buf_end = NULL;
1306 * Parse a packet, add all split parts to parse_queue.
1308 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1310 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1312 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1313 AVStream *st = s->streams[stream_index];
1314 uint8_t *data = pkt ? pkt->data : NULL;
1315 int size = pkt ? pkt->size : 0;
1316 int ret = 0, got_output = 0;
1319 av_init_packet(&flush_pkt);
1322 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1323 // preserve 0-size sync packets
1324 compute_pkt_fields(s, st, st->parser, pkt);
1327 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1330 av_init_packet(&out_pkt);
1331 len = av_parser_parse2(st->parser, st->codec,
1332 &out_pkt.data, &out_pkt.size, data, size,
1333 pkt->pts, pkt->dts, pkt->pos);
1335 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1337 /* increment read pointer */
1341 got_output = !!out_pkt.size;
1346 if (pkt->side_data) {
1347 out_pkt.side_data = pkt->side_data;
1348 out_pkt.side_data_elems = pkt->side_data_elems;
1349 pkt->side_data = NULL;
1350 pkt->side_data_elems = 0;
1353 /* set the duration */
1354 out_pkt.duration = 0;
1355 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1356 if (st->codec->sample_rate > 0) {
1358 av_rescale_q_rnd(st->parser->duration,
1359 (AVRational) { 1, st->codec->sample_rate },
1365 out_pkt.stream_index = st->index;
1366 out_pkt.pts = st->parser->pts;
1367 out_pkt.dts = st->parser->dts;
1368 out_pkt.pos = st->parser->pos;
1370 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1371 out_pkt.pos = st->parser->frame_offset;
1373 if (st->parser->key_frame == 1 ||
1374 (st->parser->key_frame == -1 &&
1375 st->parser->pict_type == AV_PICTURE_TYPE_I))
1376 out_pkt.flags |= AV_PKT_FLAG_KEY;
1378 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1379 out_pkt.flags |= AV_PKT_FLAG_KEY;
1381 compute_pkt_fields(s, st, st->parser, &out_pkt);
1383 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1384 out_pkt.buf = pkt->buf;
1386 #if FF_API_DESTRUCT_PACKET
1387 FF_DISABLE_DEPRECATION_WARNINGS
1388 out_pkt.destruct = pkt->destruct;
1389 pkt->destruct = NULL;
1390 FF_ENABLE_DEPRECATION_WARNINGS
1393 if ((ret = av_dup_packet(&out_pkt)) < 0)
1396 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1397 av_free_packet(&out_pkt);
1398 ret = AVERROR(ENOMEM);
1403 /* end of the stream => close and free the parser */
1404 if (pkt == &flush_pkt) {
1405 av_parser_close(st->parser);
1410 av_free_packet(pkt);
1414 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1415 AVPacketList **pkt_buffer_end,
1419 av_assert0(*pkt_buffer);
1422 *pkt_buffer = pktl->next;
1424 *pkt_buffer_end = NULL;
1429 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1431 int ret = 0, i, got_packet = 0;
1433 av_init_packet(pkt);
1435 while (!got_packet && !s->parse_queue) {
1439 /* read next packet */
1440 ret = ff_read_packet(s, &cur_pkt);
1442 if (ret == AVERROR(EAGAIN))
1444 /* flush the parsers */
1445 for (i = 0; i < s->nb_streams; i++) {
1447 if (st->parser && st->need_parsing)
1448 parse_packet(s, NULL, st->index);
1450 /* all remaining packets are now in parse_queue =>
1451 * really terminate parsing */
1455 st = s->streams[cur_pkt.stream_index];
1457 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1458 cur_pkt.dts != AV_NOPTS_VALUE &&
1459 cur_pkt.pts < cur_pkt.dts) {
1460 av_log(s, AV_LOG_WARNING,
1461 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1462 cur_pkt.stream_index,
1463 av_ts2str(cur_pkt.pts),
1464 av_ts2str(cur_pkt.dts),
1467 if (s->debug & FF_FDEBUG_TS)
1468 av_log(s, AV_LOG_DEBUG,
1469 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1470 cur_pkt.stream_index,
1471 av_ts2str(cur_pkt.pts),
1472 av_ts2str(cur_pkt.dts),
1473 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1475 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1476 st->parser = av_parser_init(st->codec->codec_id);
1478 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1479 "%s, packets or times may be invalid.\n",
1480 avcodec_get_name(st->codec->codec_id));
1481 /* no parser available: just output the raw packets */
1482 st->need_parsing = AVSTREAM_PARSE_NONE;
1483 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1484 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1485 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1486 st->parser->flags |= PARSER_FLAG_ONCE;
1487 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1488 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1491 if (!st->need_parsing || !st->parser) {
1492 /* no parsing needed: we just output the packet as is */
1494 compute_pkt_fields(s, st, NULL, pkt);
1495 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1496 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1497 ff_reduce_index(s, st->index);
1498 av_add_index_entry(st, pkt->pos, pkt->dts,
1499 0, 0, AVINDEX_KEYFRAME);
1502 } else if (st->discard < AVDISCARD_ALL) {
1503 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1507 av_free_packet(&cur_pkt);
1509 if (pkt->flags & AV_PKT_FLAG_KEY)
1510 st->skip_to_keyframe = 0;
1511 if (st->skip_to_keyframe) {
1512 av_free_packet(&cur_pkt);
1520 if (!got_packet && s->parse_queue)
1521 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1524 AVStream *st = s->streams[pkt->stream_index];
1525 if (st->skip_samples) {
1526 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1528 AV_WL32(p, st->skip_samples);
1529 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1531 st->skip_samples = 0;
1534 if (st->inject_global_side_data) {
1535 for (i = 0; i < st->nb_side_data; i++) {
1536 AVPacketSideData *src_sd = &st->side_data[i];
1539 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1542 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1544 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1548 memcpy(dst_data, src_sd->data, src_sd->size);
1550 st->inject_global_side_data = 0;
1553 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1554 av_packet_merge_side_data(pkt);
1557 if (s->debug & FF_FDEBUG_TS)
1558 av_log(s, AV_LOG_DEBUG,
1559 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1560 "size=%d, duration=%d, flags=%d\n",
1562 av_ts2str(pkt->pts),
1563 av_ts2str(pkt->dts),
1564 pkt->size, pkt->duration, pkt->flags);
1569 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1571 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1577 ret = s->packet_buffer
1578 ? read_from_packet_buffer(&s->packet_buffer,
1579 &s->packet_buffer_end, pkt)
1580 : read_frame_internal(s, pkt);
1587 AVPacketList *pktl = s->packet_buffer;
1590 AVPacket *next_pkt = &pktl->pkt;
1592 if (next_pkt->dts != AV_NOPTS_VALUE) {
1593 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1594 // last dts seen for this stream. if any of packets following
1595 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1596 int64_t last_dts = next_pkt->dts;
1597 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1598 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1599 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1600 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1602 next_pkt->pts = pktl->pkt.dts;
1604 if (last_dts != AV_NOPTS_VALUE) {
1605 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1606 last_dts = pktl->pkt.dts;
1611 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1612 // Fixing the last reference frame had none pts issue (For MXF etc).
1613 // We only do this when
1615 // 2. we are not able to resolve a pts value for current packet.
1616 // 3. the packets for this stream at the end of the files had valid dts.
1617 next_pkt->pts = last_dts + next_pkt->duration;
1619 pktl = s->packet_buffer;
1622 /* read packet from packet buffer, if there is data */
1623 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1624 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1625 ret = read_from_packet_buffer(&s->packet_buffer,
1626 &s->packet_buffer_end, pkt);
1631 ret = read_frame_internal(s, pkt);
1633 if (pktl && ret != AVERROR(EAGAIN)) {
1640 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1641 &s->packet_buffer_end)) < 0)
1642 return AVERROR(ENOMEM);
1647 st = s->streams[pkt->stream_index];
1648 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1649 ff_reduce_index(s, st->index);
1650 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1653 if (is_relative(pkt->dts))
1654 pkt->dts -= RELATIVE_TS_BASE;
1655 if (is_relative(pkt->pts))
1656 pkt->pts -= RELATIVE_TS_BASE;
1661 /* XXX: suppress the packet queue */
1662 static void flush_packet_queue(AVFormatContext *s)
1664 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1665 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1666 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1668 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1671 /*******************************************************/
1674 int av_find_default_stream_index(AVFormatContext *s)
1676 int first_audio_index = -1;
1680 if (s->nb_streams <= 0)
1682 for (i = 0; i < s->nb_streams; i++) {
1684 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1685 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1688 if (first_audio_index < 0 &&
1689 st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1690 first_audio_index = i;
1692 return first_audio_index >= 0 ? first_audio_index : 0;
1695 /** Flush the frame reader. */
1696 void ff_read_frame_flush(AVFormatContext *s)
1701 flush_packet_queue(s);
1703 /* Reset read state for each stream. */
1704 for (i = 0; i < s->nb_streams; i++) {
1708 av_parser_close(st->parser);
1711 st->last_IP_pts = AV_NOPTS_VALUE;
1712 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1713 if (st->first_dts == AV_NOPTS_VALUE)
1714 st->cur_dts = RELATIVE_TS_BASE;
1716 /* We set the current DTS to an unspecified origin. */
1717 st->cur_dts = AV_NOPTS_VALUE;
1719 st->probe_packets = MAX_PROBE_PACKETS;
1721 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1722 st->pts_buffer[j] = AV_NOPTS_VALUE;
1724 if (s->internal->inject_global_side_data)
1725 st->inject_global_side_data = 1;
1729 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1733 for (i = 0; i < s->nb_streams; i++) {
1734 AVStream *st = s->streams[i];
1737 av_rescale(timestamp,
1738 st->time_base.den * (int64_t) ref_st->time_base.num,
1739 st->time_base.num * (int64_t) ref_st->time_base.den);
1743 void ff_reduce_index(AVFormatContext *s, int stream_index)
1745 AVStream *st = s->streams[stream_index];
1746 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1748 if ((unsigned) st->nb_index_entries >= max_entries) {
1750 for (i = 0; 2 * i < st->nb_index_entries; i++)
1751 st->index_entries[i] = st->index_entries[2 * i];
1752 st->nb_index_entries = i;
1756 int ff_add_index_entry(AVIndexEntry **index_entries,
1757 int *nb_index_entries,
1758 unsigned int *index_entries_allocated_size,
1759 int64_t pos, int64_t timestamp,
1760 int size, int distance, int flags)
1762 AVIndexEntry *entries, *ie;
1765 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1768 if (timestamp == AV_NOPTS_VALUE)
1769 return AVERROR(EINVAL);
1771 if (size < 0 || size > 0x3FFFFFFF)
1772 return AVERROR(EINVAL);
1774 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1775 timestamp -= RELATIVE_TS_BASE;
1777 entries = av_fast_realloc(*index_entries,
1778 index_entries_allocated_size,
1779 (*nb_index_entries + 1) *
1780 sizeof(AVIndexEntry));
1784 *index_entries = entries;
1786 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1787 timestamp, AVSEEK_FLAG_ANY);
1790 index = (*nb_index_entries)++;
1791 ie = &entries[index];
1792 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1794 ie = &entries[index];
1795 if (ie->timestamp != timestamp) {
1796 if (ie->timestamp <= timestamp)
1798 memmove(entries + index + 1, entries + index,
1799 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1800 (*nb_index_entries)++;
1801 } else if (ie->pos == pos && distance < ie->min_distance)
1802 // do not reduce the distance
1803 distance = ie->min_distance;
1807 ie->timestamp = timestamp;
1808 ie->min_distance = distance;
1815 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1816 int size, int distance, int flags)
1818 timestamp = wrap_timestamp(st, timestamp);
1819 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1820 &st->index_entries_allocated_size, pos,
1821 timestamp, size, distance, flags);
1824 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1825 int64_t wanted_timestamp, int flags)
1833 // Optimize appending index entries at the end.
1834 if (b && entries[b - 1].timestamp < wanted_timestamp)
1839 timestamp = entries[m].timestamp;
1840 if (timestamp >= wanted_timestamp)
1842 if (timestamp <= wanted_timestamp)
1845 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1847 if (!(flags & AVSEEK_FLAG_ANY))
1848 while (m >= 0 && m < nb_entries &&
1849 !(entries[m].flags & AVINDEX_KEYFRAME))
1850 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1852 if (m == nb_entries)
1857 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1859 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1860 wanted_timestamp, flags);
1863 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1864 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1866 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1867 if (stream_index >= 0)
1868 ts = wrap_timestamp(s->streams[stream_index], ts);
1872 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1873 int64_t target_ts, int flags)
1875 AVInputFormat *avif = s->iformat;
1876 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1877 int64_t ts_min, ts_max, ts;
1882 if (stream_index < 0)
1885 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1888 ts_min = AV_NOPTS_VALUE;
1889 pos_limit = -1; // GCC falsely says it may be uninitialized.
1891 st = s->streams[stream_index];
1892 if (st->index_entries) {
1895 /* FIXME: Whole function must be checked for non-keyframe entries in
1896 * index case, especially read_timestamp(). */
1897 index = av_index_search_timestamp(st, target_ts,
1898 flags | AVSEEK_FLAG_BACKWARD);
1899 index = FFMAX(index, 0);
1900 e = &st->index_entries[index];
1902 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1904 ts_min = e->timestamp;
1905 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1906 pos_min, av_ts2str(ts_min));
1908 av_assert1(index == 0);
1911 index = av_index_search_timestamp(st, target_ts,
1912 flags & ~AVSEEK_FLAG_BACKWARD);
1913 av_assert0(index < st->nb_index_entries);
1915 e = &st->index_entries[index];
1916 av_assert1(e->timestamp >= target_ts);
1918 ts_max = e->timestamp;
1919 pos_limit = pos_max - e->min_distance;
1920 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1921 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1925 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1926 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1931 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1934 ff_read_frame_flush(s);
1935 ff_update_cur_dts(s, st, ts);
1940 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1941 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1943 int64_t step = 1024;
1944 int64_t limit, ts_max;
1945 int64_t filesize = avio_size(s->pb);
1946 int64_t pos_max = filesize - 1;
1949 pos_max = FFMAX(0, (pos_max) - step);
1950 ts_max = ff_read_timestamp(s, stream_index,
1951 &pos_max, limit, read_timestamp);
1953 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1954 if (ts_max == AV_NOPTS_VALUE)
1958 int64_t tmp_pos = pos_max + 1;
1959 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1960 &tmp_pos, INT64_MAX, read_timestamp);
1961 if (tmp_ts == AV_NOPTS_VALUE)
1963 av_assert0(tmp_pos > pos_max);
1966 if (tmp_pos >= filesize)
1978 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1979 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1980 int64_t ts_min, int64_t ts_max,
1981 int flags, int64_t *ts_ret,
1982 int64_t (*read_timestamp)(struct AVFormatContext *, int,
1983 int64_t *, int64_t))
1990 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1992 if (ts_min == AV_NOPTS_VALUE) {
1993 pos_min = s->data_offset;
1994 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1995 if (ts_min == AV_NOPTS_VALUE)
1999 if (ts_min >= target_ts) {
2004 if (ts_max == AV_NOPTS_VALUE) {
2005 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2007 pos_limit = pos_max;
2010 if (ts_max <= target_ts) {
2015 if (ts_min > ts_max)
2017 else if (ts_min == ts_max)
2018 pos_limit = pos_min;
2021 while (pos_min < pos_limit) {
2023 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2024 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2025 assert(pos_limit <= pos_max);
2027 if (no_change == 0) {
2028 int64_t approximate_keyframe_distance = pos_max - pos_limit;
2029 // interpolate position (better than dichotomy)
2030 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2032 pos_min - approximate_keyframe_distance;
2033 } else if (no_change == 1) {
2034 // bisection if interpolation did not change min / max pos last time
2035 pos = (pos_min + pos_limit) >> 1;
2037 /* linear search if bisection failed, can only happen if there
2038 * are very few or no keyframes between min/max */
2043 else if (pos > pos_limit)
2047 // May pass pos_limit instead of -1.
2048 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2053 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2054 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2055 pos_min, pos, pos_max,
2056 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2057 pos_limit, start_pos, no_change);
2058 if (ts == AV_NOPTS_VALUE) {
2059 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2062 assert(ts != AV_NOPTS_VALUE);
2063 if (target_ts <= ts) {
2064 pos_limit = start_pos - 1;
2068 if (target_ts >= ts) {
2074 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2075 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2078 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2080 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2081 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2082 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2088 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2089 int64_t pos, int flags)
2091 int64_t pos_min, pos_max;
2093 pos_min = s->data_offset;
2094 pos_max = avio_size(s->pb) - 1;
2098 else if (pos > pos_max)
2101 avio_seek(s->pb, pos, SEEK_SET);
2103 s->io_repositioned = 1;
2108 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2109 int64_t timestamp, int flags)
2116 st = s->streams[stream_index];
2118 index = av_index_search_timestamp(st, timestamp, flags);
2120 if (index < 0 && st->nb_index_entries &&
2121 timestamp < st->index_entries[0].timestamp)
2124 if (index < 0 || index == st->nb_index_entries - 1) {
2128 if (st->nb_index_entries) {
2129 av_assert0(st->index_entries);
2130 ie = &st->index_entries[st->nb_index_entries - 1];
2131 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2133 ff_update_cur_dts(s, st, ie->timestamp);
2135 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
2141 read_status = av_read_frame(s, &pkt);
2142 } while (read_status == AVERROR(EAGAIN));
2143 if (read_status < 0)
2145 av_free_packet(&pkt);
2146 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2147 if (pkt.flags & AV_PKT_FLAG_KEY)
2149 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2150 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);
2155 index = av_index_search_timestamp(st, timestamp, flags);
2160 ff_read_frame_flush(s);
2161 if (s->iformat->read_seek)
2162 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2164 ie = &st->index_entries[index];
2165 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2167 ff_update_cur_dts(s, st, ie->timestamp);
2172 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2173 int64_t timestamp, int flags)
2178 if (flags & AVSEEK_FLAG_BYTE) {
2179 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2181 ff_read_frame_flush(s);
2182 return seek_frame_byte(s, stream_index, timestamp, flags);
2185 if (stream_index < 0) {
2186 stream_index = av_find_default_stream_index(s);
2187 if (stream_index < 0)
2190 st = s->streams[stream_index];
2191 /* timestamp for default must be expressed in AV_TIME_BASE units */
2192 timestamp = av_rescale(timestamp, st->time_base.den,
2193 AV_TIME_BASE * (int64_t) st->time_base.num);
2196 /* first, we try the format specific seek */
2197 if (s->iformat->read_seek) {
2198 ff_read_frame_flush(s);
2199 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2205 if (s->iformat->read_timestamp &&
2206 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2207 ff_read_frame_flush(s);
2208 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2209 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2210 ff_read_frame_flush(s);
2211 return seek_frame_generic(s, stream_index, timestamp, flags);
2216 int av_seek_frame(AVFormatContext *s, int stream_index,
2217 int64_t timestamp, int flags)
2221 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2222 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2223 if ((flags & AVSEEK_FLAG_BACKWARD))
2227 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2228 flags & ~AVSEEK_FLAG_BACKWARD);
2231 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2234 ret = avformat_queue_attached_pictures(s);
2239 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2240 int64_t ts, int64_t max_ts, int flags)
2242 if (min_ts > ts || max_ts < ts)
2244 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2245 return AVERROR(EINVAL);
2248 flags |= AVSEEK_FLAG_ANY;
2249 flags &= ~AVSEEK_FLAG_BACKWARD;
2251 if (s->iformat->read_seek2) {
2253 ff_read_frame_flush(s);
2255 if (stream_index == -1 && s->nb_streams == 1) {
2256 AVRational time_base = s->streams[0]->time_base;
2257 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2258 min_ts = av_rescale_rnd(min_ts, time_base.den,
2259 time_base.num * (int64_t)AV_TIME_BASE,
2260 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2261 max_ts = av_rescale_rnd(max_ts, time_base.den,
2262 time_base.num * (int64_t)AV_TIME_BASE,
2263 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2266 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2270 ret = avformat_queue_attached_pictures(s);
2274 if (s->iformat->read_timestamp) {
2275 // try to seek via read_timestamp()
2278 // Fall back on old API if new is not implemented but old is.
2279 // Note the old API has somewhat different semantics.
2280 if (s->iformat->read_seek || 1) {
2281 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2282 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2283 if (ret<0 && ts != min_ts && max_ts != ts) {
2284 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2286 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2291 // try some generic seek like seek_frame_generic() but with new ts semantics
2292 return -1; //unreachable
2295 /*******************************************************/
2298 * Return TRUE if the stream has accurate duration in any stream.
2300 * @return TRUE if the stream has accurate duration for at least one component.
2302 static int has_duration(AVFormatContext *ic)
2307 for (i = 0; i < ic->nb_streams; i++) {
2308 st = ic->streams[i];
2309 if (st->duration != AV_NOPTS_VALUE)
2312 if (ic->duration != AV_NOPTS_VALUE)
2318 * Estimate the stream timings from the one of each components.
2320 * Also computes the global bitrate if possible.
2322 static void update_stream_timings(AVFormatContext *ic)
2324 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2325 int64_t duration, duration1, filesize;
2330 start_time = INT64_MAX;
2331 start_time_text = INT64_MAX;
2332 end_time = INT64_MIN;
2333 duration = INT64_MIN;
2334 for (i = 0; i < ic->nb_streams; i++) {
2335 st = ic->streams[i];
2336 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2337 start_time1 = av_rescale_q(st->start_time, st->time_base,
2339 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2340 if (start_time1 < start_time_text)
2341 start_time_text = start_time1;
2343 start_time = FFMIN(start_time, start_time1);
2344 end_time1 = AV_NOPTS_VALUE;
2345 if (st->duration != AV_NOPTS_VALUE) {
2346 end_time1 = start_time1 +
2347 av_rescale_q(st->duration, st->time_base,
2349 end_time = FFMAX(end_time, end_time1);
2351 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2352 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2353 p->start_time = start_time1;
2354 if (p->end_time < end_time1)
2355 p->end_time = end_time1;
2358 if (st->duration != AV_NOPTS_VALUE) {
2359 duration1 = av_rescale_q(st->duration, st->time_base,
2361 duration = FFMAX(duration, duration1);
2364 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2365 start_time = start_time_text;
2366 else if (start_time > start_time_text)
2367 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2369 if (start_time != INT64_MAX) {
2370 ic->start_time = start_time;
2371 if (end_time != INT64_MIN) {
2372 if (ic->nb_programs) {
2373 for (i = 0; i < ic->nb_programs; i++) {
2374 p = ic->programs[i];
2375 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2376 duration = FFMAX(duration, p->end_time - p->start_time);
2379 duration = FFMAX(duration, end_time - start_time);
2382 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2383 ic->duration = duration;
2385 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2386 /* compute the bitrate */
2387 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2388 (double) ic->duration;
2389 if (bitrate >= 0 && bitrate <= INT_MAX)
2390 ic->bit_rate = bitrate;
2394 static void fill_all_stream_timings(AVFormatContext *ic)
2399 update_stream_timings(ic);
2400 for (i = 0; i < ic->nb_streams; i++) {
2401 st = ic->streams[i];
2402 if (st->start_time == AV_NOPTS_VALUE) {
2403 if (ic->start_time != AV_NOPTS_VALUE)
2404 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2406 if (ic->duration != AV_NOPTS_VALUE)
2407 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2413 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2415 int64_t filesize, duration;
2416 int i, show_warning = 0;
2419 /* if bit_rate is already set, we believe it */
2420 if (ic->bit_rate <= 0) {
2422 for (i = 0; i < ic->nb_streams; i++) {
2423 st = ic->streams[i];
2424 if (st->codec->bit_rate > 0) {
2425 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2429 bit_rate += st->codec->bit_rate;
2432 ic->bit_rate = bit_rate;
2435 /* if duration is already set, we believe it */
2436 if (ic->duration == AV_NOPTS_VALUE &&
2437 ic->bit_rate != 0) {
2438 filesize = ic->pb ? avio_size(ic->pb) : 0;
2440 for (i = 0; i < ic->nb_streams; i++) {
2441 st = ic->streams[i];
2442 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2443 && st->duration == AV_NOPTS_VALUE) {
2444 duration = av_rescale(8 * filesize, st->time_base.den,
2446 (int64_t) st->time_base.num);
2447 st->duration = duration;
2454 av_log(ic, AV_LOG_WARNING,
2455 "Estimating duration from bitrate, this may be inaccurate\n");
2458 #define DURATION_MAX_READ_SIZE 250000LL
2459 #define DURATION_MAX_RETRY 4
2461 /* only usable for MPEG-PS streams */
2462 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2464 AVPacket pkt1, *pkt = &pkt1;
2466 int read_size, i, ret;
2468 int64_t filesize, offset, duration;
2471 /* flush packet queue */
2472 flush_packet_queue(ic);
2474 for (i = 0; i < ic->nb_streams; i++) {
2475 st = ic->streams[i];
2476 if (st->start_time == AV_NOPTS_VALUE &&
2477 st->first_dts == AV_NOPTS_VALUE &&
2478 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2479 av_log(st->codec, AV_LOG_WARNING,
2480 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2483 av_parser_close(st->parser);
2488 /* estimate the end time (duration) */
2489 /* XXX: may need to support wrapping */
2490 filesize = ic->pb ? avio_size(ic->pb) : 0;
2491 end_time = AV_NOPTS_VALUE;
2493 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2497 avio_seek(ic->pb, offset, SEEK_SET);
2500 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2504 ret = ff_read_packet(ic, pkt);
2505 } while (ret == AVERROR(EAGAIN));
2508 read_size += pkt->size;
2509 st = ic->streams[pkt->stream_index];
2510 if (pkt->pts != AV_NOPTS_VALUE &&
2511 (st->start_time != AV_NOPTS_VALUE ||
2512 st->first_dts != AV_NOPTS_VALUE)) {
2513 duration = end_time = pkt->pts;
2514 if (st->start_time != AV_NOPTS_VALUE)
2515 duration -= st->start_time;
2517 duration -= st->first_dts;
2519 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2520 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2521 st->duration = duration;
2522 st->info->last_duration = duration;
2525 av_free_packet(pkt);
2527 } while (end_time == AV_NOPTS_VALUE &&
2528 filesize > (DURATION_MAX_READ_SIZE << retry) &&
2529 ++retry <= DURATION_MAX_RETRY);
2531 fill_all_stream_timings(ic);
2533 avio_seek(ic->pb, old_offset, SEEK_SET);
2534 for (i = 0; i < ic->nb_streams; i++) {
2537 st = ic->streams[i];
2538 st->cur_dts = st->first_dts;
2539 st->last_IP_pts = AV_NOPTS_VALUE;
2540 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2541 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2542 st->pts_buffer[j] = AV_NOPTS_VALUE;
2546 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2550 /* get the file size, if possible */
2551 if (ic->iformat->flags & AVFMT_NOFILE) {
2554 file_size = avio_size(ic->pb);
2555 file_size = FFMAX(0, file_size);
2558 if ((!strcmp(ic->iformat->name, "mpeg") ||
2559 !strcmp(ic->iformat->name, "mpegts")) &&
2560 file_size && ic->pb->seekable) {
2561 /* get accurate estimate from the PTSes */
2562 estimate_timings_from_pts(ic, old_offset);
2563 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2564 } else if (has_duration(ic)) {
2565 /* at least one component has timings - we use them for all
2567 fill_all_stream_timings(ic);
2568 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2570 /* less precise: use bitrate info */
2571 estimate_timings_from_bit_rate(ic);
2572 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2574 update_stream_timings(ic);
2578 AVStream av_unused *st;
2579 for (i = 0; i < ic->nb_streams; i++) {
2580 st = ic->streams[i];
2581 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2582 (double) st->start_time / AV_TIME_BASE,
2583 (double) st->duration / AV_TIME_BASE);
2586 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2587 (double) ic->start_time / AV_TIME_BASE,
2588 (double) ic->duration / AV_TIME_BASE,
2589 ic->bit_rate / 1000);
2593 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2595 AVCodecContext *avctx = st->codec;
2597 #define FAIL(errmsg) do { \
2599 *errmsg_ptr = errmsg; \
2603 switch (avctx->codec_type) {
2604 case AVMEDIA_TYPE_AUDIO:
2605 if (!avctx->frame_size && determinable_frame_size(avctx))
2606 FAIL("unspecified frame size");
2607 if (st->info->found_decoder >= 0 &&
2608 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2609 FAIL("unspecified sample format");
2610 if (!avctx->sample_rate)
2611 FAIL("unspecified sample rate");
2612 if (!avctx->channels)
2613 FAIL("unspecified number of channels");
2614 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2615 FAIL("no decodable DTS frames");
2617 case AVMEDIA_TYPE_VIDEO:
2619 FAIL("unspecified size");
2620 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2621 FAIL("unspecified pixel format");
2622 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2623 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2624 FAIL("no frame in rv30/40 and no sar");
2626 case AVMEDIA_TYPE_SUBTITLE:
2627 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2628 FAIL("unspecified size");
2630 case AVMEDIA_TYPE_DATA:
2631 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2634 if (avctx->codec_id == AV_CODEC_ID_NONE)
2635 FAIL("unknown codec");
2639 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2640 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2641 AVDictionary **options)
2643 const AVCodec *codec;
2644 int got_picture = 1, ret = 0;
2645 AVFrame *frame = av_frame_alloc();
2646 AVSubtitle subtitle;
2647 AVPacket pkt = *avpkt;
2650 return AVERROR(ENOMEM);
2652 if (!avcodec_is_open(st->codec) &&
2653 st->info->found_decoder <= 0 &&
2654 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2655 AVDictionary *thread_opt = NULL;
2657 codec = find_decoder(s, st, st->codec->codec_id);
2660 st->info->found_decoder = -st->codec->codec_id;
2665 /* Force thread count to 1 since the H.264 decoder will not extract
2666 * SPS and PPS to extradata during multi-threaded decoding. */
2667 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2668 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2670 av_dict_free(&thread_opt);
2672 st->info->found_decoder = -st->codec->codec_id;
2675 st->info->found_decoder = 1;
2676 } else if (!st->info->found_decoder)
2677 st->info->found_decoder = 1;
2679 if (st->info->found_decoder < 0) {
2684 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2686 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2687 (!st->codec_info_nb_frames &&
2688 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2690 switch (st->codec->codec_type) {
2691 case AVMEDIA_TYPE_VIDEO:
2692 ret = avcodec_decode_video2(st->codec, frame,
2693 &got_picture, &pkt);
2695 case AVMEDIA_TYPE_AUDIO:
2696 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2698 case AVMEDIA_TYPE_SUBTITLE:
2699 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2700 &got_picture, &pkt);
2708 st->nb_decoded_frames++;
2715 if (!pkt.data && !got_picture)
2719 av_frame_free(&frame);
2723 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2725 while (tags->id != AV_CODEC_ID_NONE) {
2733 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2736 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2737 if (tag == tags[i].tag)
2739 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2740 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2742 return AV_CODEC_ID_NONE;
2745 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2750 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2752 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2754 return AV_CODEC_ID_NONE;
2759 if (sflags & (1 << (bps - 1))) {
2762 return AV_CODEC_ID_PCM_S8;
2764 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2766 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2768 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2770 return AV_CODEC_ID_NONE;
2775 return AV_CODEC_ID_PCM_U8;
2777 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2779 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2781 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2783 return AV_CODEC_ID_NONE;
2789 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2792 if (!av_codec_get_tag2(tags, id, &tag))
2797 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2801 for (i = 0; tags && tags[i]; i++) {
2802 const AVCodecTag *codec_tags = tags[i];
2803 while (codec_tags->id != AV_CODEC_ID_NONE) {
2804 if (codec_tags->id == id) {
2805 *tag = codec_tags->tag;
2814 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2817 for (i = 0; tags && tags[i]; i++) {
2818 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2819 if (id != AV_CODEC_ID_NONE)
2822 return AV_CODEC_ID_NONE;
2825 static void compute_chapters_end(AVFormatContext *s)
2828 int64_t max_time = s->duration +
2829 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2831 for (i = 0; i < s->nb_chapters; i++)
2832 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2833 AVChapter *ch = s->chapters[i];
2834 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2838 for (j = 0; j < s->nb_chapters; j++) {
2839 AVChapter *ch1 = s->chapters[j];
2840 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2842 if (j != i && next_start > ch->start && next_start < end)
2845 ch->end = (end == INT64_MAX) ? ch->start : end;
2849 static int get_std_framerate(int i)
2852 return (i + 1) * 1001;
2854 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i - 60 * 12] * 1000 * 12;
2857 /* Is the time base unreliable?
2858 * This is a heuristic to balance between quick acceptance of the values in
2859 * the headers vs. some extra checks.
2860 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2861 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2862 * And there are "variable" fps files this needs to detect as well. */
2863 static int tb_unreliable(AVCodecContext *c)
2865 if (c->time_base.den >= 101L * c->time_base.num ||
2866 c->time_base.den < 5L * c->time_base.num ||
2867 // c->codec_tag == AV_RL32("DIVX") ||
2868 // c->codec_tag == AV_RL32("XVID") ||
2869 c->codec_tag == AV_RL32("mp4v") ||
2870 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2871 c->codec_id == AV_CODEC_ID_GIF ||
2872 c->codec_id == AV_CODEC_ID_H264)
2877 #if FF_API_FORMAT_PARAMETERS
2878 int av_find_stream_info(AVFormatContext *ic)
2880 return avformat_find_stream_info(ic, NULL);
2884 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2888 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2889 avctx->extradata_size = 0;
2890 return AVERROR(EINVAL);
2892 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2893 if (avctx->extradata) {
2894 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2895 avctx->extradata_size = size;
2898 avctx->extradata_size = 0;
2899 ret = AVERROR(ENOMEM);
2904 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
2906 int ret = ff_alloc_extradata(avctx, size);
2909 ret = avio_read(pb, avctx->extradata, size);
2911 av_freep(&avctx->extradata);
2912 avctx->extradata_size = 0;
2913 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
2914 return ret < 0 ? ret : AVERROR_INVALIDDATA;
2920 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
2923 int64_t last = st->info->last_dts;
2925 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
2926 && ts - (uint64_t)last < INT64_MAX) {
2927 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
2928 int64_t duration = ts - last;
2930 if (!st->info->duration_error)
2931 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2932 if (!st->info->duration_error)
2933 return AVERROR(ENOMEM);
2935 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2936 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2937 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2938 if (st->info->duration_error[0][1][i] < 1e10) {
2939 int framerate = get_std_framerate(i);
2940 double sdts = dts*framerate/(1001*12);
2941 for (j= 0; j<2; j++) {
2942 int64_t ticks = llrint(sdts+j*0.5);
2943 double error= sdts - ticks + j*0.5;
2944 st->info->duration_error[j][0][i] += error;
2945 st->info->duration_error[j][1][i] += error*error;
2949 st->info->duration_count++;
2950 st->info->rfps_duration_sum += duration;
2952 if (st->info->duration_count % 10 == 0) {
2953 int n = st->info->duration_count;
2954 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
2955 if (st->info->duration_error[0][1][i] < 1e10) {
2956 double a0 = st->info->duration_error[0][0][i] / n;
2957 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
2958 double a1 = st->info->duration_error[1][0][i] / n;
2959 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
2960 if (error0 > 0.04 && error1 > 0.04) {
2961 st->info->duration_error[0][1][i] = 2e10;
2962 st->info->duration_error[1][1][i] = 2e10;
2968 // ignore the first 4 values, they might have some random jitter
2969 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
2970 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2972 if (ts != AV_NOPTS_VALUE)
2973 st->info->last_dts = ts;
2978 void ff_rfps_calculate(AVFormatContext *ic)
2982 for (i = 0; i < ic->nb_streams; i++) {
2983 AVStream *st = ic->streams[i];
2985 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
2987 // the check for tb_unreliable() is not completely correct, since this is not about handling
2988 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2989 // ipmovie.c produces.
2990 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)
2991 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);
2992 if (st->info->duration_count>1 && !st->r_frame_rate.num
2993 && tb_unreliable(st->codec)) {
2995 double best_error= 0.01;
2996 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
2998 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
3001 if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
3003 if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
3006 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
3009 for (k= 0; k<2; k++) {
3010 int n = st->info->duration_count;
3011 double a= st->info->duration_error[k][0][j] / n;
3012 double error= st->info->duration_error[k][1][j]/n - a*a;
3014 if (error < best_error && best_error> 0.000000001) {
3016 num = get_std_framerate(j);
3019 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3022 // do not increase frame rate by more than 1 % in order to match a standard rate.
3023 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
3024 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3026 if ( !st->avg_frame_rate.num
3027 && st->r_frame_rate.num && st->info->rfps_duration_sum
3028 && st->info->codec_info_duration <= 0
3029 && st->info->duration_count > 2
3030 && 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
3032 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
3033 st->avg_frame_rate = st->r_frame_rate;
3036 av_freep(&st->info->duration_error);
3037 st->info->last_dts = AV_NOPTS_VALUE;
3038 st->info->duration_count = 0;
3039 st->info->rfps_duration_sum = 0;
3043 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
3045 int i, count, ret = 0, j;
3048 AVPacket pkt1, *pkt;
3049 int64_t old_offset = avio_tell(ic->pb);
3050 // new streams might appear, no options for those
3051 int orig_nb_streams = ic->nb_streams;
3052 int flush_codecs = ic->probesize > 0;
3055 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
3056 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
3058 for (i = 0; i < ic->nb_streams; i++) {
3059 const AVCodec *codec;
3060 AVDictionary *thread_opt = NULL;
3061 st = ic->streams[i];
3063 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3064 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3065 /* if (!st->time_base.num)
3067 if (!st->codec->time_base.num)
3068 st->codec->time_base = st->time_base;
3070 // only for the split stuff
3071 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
3072 st->parser = av_parser_init(st->codec->codec_id);
3074 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3075 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3076 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3077 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3079 } else if (st->need_parsing) {
3080 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3081 "%s, packets or times may be invalid.\n",
3082 avcodec_get_name(st->codec->codec_id));
3085 codec = find_decoder(ic, st, st->codec->codec_id);
3087 /* Force thread count to 1 since the H.264 decoder will not extract
3088 * SPS and PPS to extradata during multi-threaded decoding. */
3089 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3091 /* Ensure that subtitle_header is properly set. */
3092 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3093 && codec && !st->codec->codec) {
3094 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3095 av_log(ic, AV_LOG_WARNING,
3096 "Failed to open codec in av_find_stream_info\n");
3099 // Try to just open decoders, in case this is enough to get parameters.
3100 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3101 if (codec && !st->codec->codec)
3102 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3103 av_log(ic, AV_LOG_WARNING,
3104 "Failed to open codec in av_find_stream_info\n");
3107 av_dict_free(&thread_opt);
3110 for (i = 0; i < ic->nb_streams; i++) {
3111 #if FF_API_R_FRAME_RATE
3112 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3114 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3115 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3121 if (ff_check_interrupt(&ic->interrupt_callback)) {
3123 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3127 /* check if one codec still needs to be handled */
3128 for (i = 0; i < ic->nb_streams; i++) {
3129 int fps_analyze_framecount = 20;
3131 st = ic->streams[i];
3132 if (!has_codec_parameters(st, NULL))
3134 /* If the timebase is coarse (like the usual millisecond precision
3135 * of mkv), we need to analyze more frames to reliably arrive at
3136 * the correct fps. */
3137 if (av_q2d(st->time_base) > 0.0005)
3138 fps_analyze_framecount *= 2;
3139 if (!tb_unreliable(st->codec))
3140 fps_analyze_framecount = 0;
3141 if (ic->fps_probe_size >= 0)
3142 fps_analyze_framecount = ic->fps_probe_size;
3143 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3144 fps_analyze_framecount = 0;
3145 /* variable fps and no guess at the real fps */
3146 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3147 st->info->duration_count < fps_analyze_framecount &&
3148 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3150 if (st->parser && st->parser->parser->split &&
3151 !st->codec->extradata)
3153 if (st->first_dts == AV_NOPTS_VALUE &&
3154 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3155 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3158 if (i == ic->nb_streams) {
3159 /* NOTE: If the format has no header, then we need to read some
3160 * packets to get most of the streams, so we cannot stop here. */
3161 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3162 /* If we found the info for all the codecs, we can stop. */
3164 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3169 /* We did not get all the codec info, but we read too much data. */
3170 if (read_size >= ic->probesize) {
3172 av_log(ic, AV_LOG_DEBUG,
3173 "Probe buffer size limit of %d bytes reached\n", ic->probesize);
3174 for (i = 0; i < ic->nb_streams; i++)
3175 if (!ic->streams[i]->r_frame_rate.num &&
3176 ic->streams[i]->info->duration_count <= 1 &&
3177 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3178 strcmp(ic->iformat->name, "image2"))
3179 av_log(ic, AV_LOG_WARNING,
3180 "Stream #%d: not enough frames to estimate rate; "
3181 "consider increasing probesize\n", i);
3185 /* NOTE: A new stream can be added there if no header in file
3186 * (AVFMTCTX_NOHEADER). */
3187 ret = read_frame_internal(ic, &pkt1);
3188 if (ret == AVERROR(EAGAIN))
3196 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3197 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3199 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3200 &ic->packet_buffer_end);
3202 ret = AVERROR(ENOMEM);
3203 goto find_stream_info_err;
3205 if ((ret = av_dup_packet(pkt)) < 0)
3206 goto find_stream_info_err;
3209 st = ic->streams[pkt->stream_index];
3210 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3211 read_size += pkt->size;
3213 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3214 /* check for non-increasing dts */
3215 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3216 st->info->fps_last_dts >= pkt->dts) {
3217 av_log(ic, AV_LOG_DEBUG,
3218 "Non-increasing DTS in stream %d: packet %d with DTS "
3219 "%"PRId64", packet %d with DTS %"PRId64"\n",
3220 st->index, st->info->fps_last_dts_idx,
3221 st->info->fps_last_dts, st->codec_info_nb_frames,
3223 st->info->fps_first_dts =
3224 st->info->fps_last_dts = AV_NOPTS_VALUE;
3226 /* Check for a discontinuity in dts. If the difference in dts
3227 * is more than 1000 times the average packet duration in the
3228 * sequence, we treat it as a discontinuity. */
3229 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3230 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3231 (pkt->dts - st->info->fps_last_dts) / 1000 >
3232 (st->info->fps_last_dts - st->info->fps_first_dts) /
3233 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3234 av_log(ic, AV_LOG_WARNING,
3235 "DTS discontinuity in stream %d: packet %d with DTS "
3236 "%"PRId64", packet %d with DTS %"PRId64"\n",
3237 st->index, st->info->fps_last_dts_idx,
3238 st->info->fps_last_dts, st->codec_info_nb_frames,
3240 st->info->fps_first_dts =
3241 st->info->fps_last_dts = AV_NOPTS_VALUE;
3244 /* update stored dts values */
3245 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3246 st->info->fps_first_dts = pkt->dts;
3247 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3249 st->info->fps_last_dts = pkt->dts;
3250 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3252 if (st->codec_info_nb_frames>1) {
3254 if (st->time_base.den > 0)
3255 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3256 if (st->avg_frame_rate.num > 0)
3257 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3260 && st->codec_info_nb_frames>30
3261 && st->info->fps_first_dts != AV_NOPTS_VALUE
3262 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3263 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3265 if (t >= ic->max_analyze_duration) {
3266 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %d reached at %"PRId64" microseconds\n",
3267 ic->max_analyze_duration,
3271 if (pkt->duration) {
3272 st->info->codec_info_duration += pkt->duration;
3273 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3276 #if FF_API_R_FRAME_RATE
3277 ff_rfps_add_frame(ic, st, pkt->dts);
3279 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3280 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3281 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3282 if (ff_alloc_extradata(st->codec, i))
3283 return AVERROR(ENOMEM);
3284 memcpy(st->codec->extradata, pkt->data,
3285 st->codec->extradata_size);
3289 /* If still no information, we try to open the codec and to
3290 * decompress the frame. We try to avoid that in most cases as
3291 * it takes longer and uses more memory. For MPEG-4, we need to
3292 * decompress for QuickTime.
3294 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3295 * least one frame of codec data, this makes sure the codec initializes
3296 * the channel configuration and does not only trust the values from
3298 try_decode_frame(ic, st, pkt,
3299 (options && i < orig_nb_streams) ? &options[i] : NULL);
3301 st->codec_info_nb_frames++;
3306 AVPacket empty_pkt = { 0 };
3308 av_init_packet(&empty_pkt);
3310 for (i = 0; i < ic->nb_streams; i++) {
3312 st = ic->streams[i];
3314 /* flush the decoders */
3315 if (st->info->found_decoder == 1) {
3317 err = try_decode_frame(ic, st, &empty_pkt,
3318 (options && i < orig_nb_streams)
3319 ? &options[i] : NULL);
3320 } while (err > 0 && !has_codec_parameters(st, NULL));
3323 av_log(ic, AV_LOG_INFO,
3324 "decoding for stream %d failed\n", st->index);
3330 // close codecs which were opened in try_decode_frame()
3331 for (i = 0; i < ic->nb_streams; i++) {
3332 st = ic->streams[i];
3333 avcodec_close(st->codec);
3336 ff_rfps_calculate(ic);
3338 for (i = 0; i < ic->nb_streams; i++) {
3339 st = ic->streams[i];
3340 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3341 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3342 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3343 if (avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
3344 st->codec->codec_tag= tag;
3347 /* estimate average framerate if not set by demuxer */
3348 if (st->info->codec_info_duration_fields &&
3349 !st->avg_frame_rate.num &&
3350 st->info->codec_info_duration) {
3352 double best_error = 0.01;
3354 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3355 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3356 st->info->codec_info_duration < 0)
3358 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3359 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3360 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3362 /* Round guessed framerate to a "standard" framerate if it's
3363 * within 1% of the original estimate. */
3364 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3365 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3366 double error = fabs(av_q2d(st->avg_frame_rate) /
3367 av_q2d(std_fps) - 1);
3369 if (error < best_error) {
3371 best_fps = std_fps.num;
3375 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3376 best_fps, 12 * 1001, INT_MAX);
3379 if (!st->r_frame_rate.num) {
3380 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3381 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3382 st->r_frame_rate.num = st->codec->time_base.den;
3383 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3385 st->r_frame_rate.num = st->time_base.den;
3386 st->r_frame_rate.den = st->time_base.num;
3389 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3390 if (!st->codec->bits_per_coded_sample)
3391 st->codec->bits_per_coded_sample =
3392 av_get_bits_per_sample(st->codec->codec_id);
3393 // set stream disposition based on audio service type
3394 switch (st->codec->audio_service_type) {
3395 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3396 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3398 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3399 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3401 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3402 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3404 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3405 st->disposition = AV_DISPOSITION_COMMENT;
3407 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3408 st->disposition = AV_DISPOSITION_KARAOKE;
3415 estimate_timings(ic, old_offset);
3417 if (ret >= 0 && ic->nb_streams)
3418 /* We could not have all the codec parameters before EOF. */
3420 for (i = 0; i < ic->nb_streams; i++) {
3422 st = ic->streams[i];
3423 if (!has_codec_parameters(st, &errmsg)) {
3425 avcodec_string(buf, sizeof(buf), st->codec, 0);
3426 av_log(ic, AV_LOG_WARNING,
3427 "Could not find codec parameters for stream %d (%s): %s\n"
3428 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3435 compute_chapters_end(ic);
3437 find_stream_info_err:
3438 for (i = 0; i < ic->nb_streams; i++) {
3439 st = ic->streams[i];
3440 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3441 ic->streams[i]->codec->thread_count = 0;
3443 av_freep(&st->info->duration_error);
3444 av_freep(&ic->streams[i]->info);
3447 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3448 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3452 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3456 for (i = 0; i < ic->nb_programs; i++) {
3457 if (ic->programs[i] == last) {
3461 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3462 if (ic->programs[i]->stream_index[j] == s)
3463 return ic->programs[i];
3469 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3470 int wanted_stream_nb, int related_stream,
3471 AVCodec **decoder_ret, int flags)
3473 int i, nb_streams = ic->nb_streams;
3474 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3475 unsigned *program = NULL;
3476 AVCodec *decoder = NULL, *best_decoder = NULL;
3478 if (related_stream >= 0 && wanted_stream_nb < 0) {
3479 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3481 program = p->stream_index;
3482 nb_streams = p->nb_stream_indexes;
3485 for (i = 0; i < nb_streams; i++) {
3486 int real_stream_index = program ? program[i] : i;
3487 AVStream *st = ic->streams[real_stream_index];
3488 AVCodecContext *avctx = st->codec;
3489 if (avctx->codec_type != type)
3491 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3493 if (wanted_stream_nb != real_stream_index &&
3494 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3495 AV_DISPOSITION_VISUAL_IMPAIRED))
3497 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3500 decoder = find_decoder(ic, st, st->codec->codec_id);
3503 ret = AVERROR_DECODER_NOT_FOUND;
3507 count = st->codec_info_nb_frames;
3508 bitrate = avctx->bit_rate;
3509 multiframe = FFMIN(5, count);
3510 if ((best_multiframe > multiframe) ||
3511 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3512 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3515 best_bitrate = bitrate;
3516 best_multiframe = multiframe;
3517 ret = real_stream_index;
3518 best_decoder = decoder;
3519 if (program && i == nb_streams - 1 && ret < 0) {
3521 nb_streams = ic->nb_streams;
3522 /* no related stream found, try again with everything */
3527 *decoder_ret = best_decoder;
3531 /*******************************************************/
3533 int av_read_play(AVFormatContext *s)
3535 if (s->iformat->read_play)
3536 return s->iformat->read_play(s);
3538 return avio_pause(s->pb, 0);
3539 return AVERROR(ENOSYS);
3542 int av_read_pause(AVFormatContext *s)
3544 if (s->iformat->read_pause)
3545 return s->iformat->read_pause(s);
3547 return avio_pause(s->pb, 1);
3548 return AVERROR(ENOSYS);
3551 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3553 av_assert0(s->nb_streams>0);
3554 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3556 for (j = 0; j < st->nb_side_data; j++)
3557 av_freep(&st->side_data[j].data);
3558 av_freep(&st->side_data);
3559 st->nb_side_data = 0;
3562 av_parser_close(st->parser);
3564 if (st->attached_pic.data)
3565 av_free_packet(&st->attached_pic);
3566 av_dict_free(&st->metadata);
3567 av_freep(&st->probe_data.buf);
3568 av_freep(&st->index_entries);
3569 av_freep(&st->codec->extradata);
3570 av_freep(&st->codec->subtitle_header);
3571 av_freep(&st->codec);
3572 av_freep(&st->priv_data);
3574 av_freep(&st->info->duration_error);
3575 av_freep(&st->info);
3576 av_freep(&s->streams[ --s->nb_streams ]);
3579 void avformat_free_context(AVFormatContext *s)
3587 if (s->iformat && s->iformat->priv_class && s->priv_data)
3588 av_opt_free(s->priv_data);
3589 if (s->oformat && s->oformat->priv_class && s->priv_data)
3590 av_opt_free(s->priv_data);
3592 for (i = s->nb_streams - 1; i >= 0; i--) {
3593 ff_free_stream(s, s->streams[i]);
3595 for (i = s->nb_programs - 1; i >= 0; i--) {
3596 av_dict_free(&s->programs[i]->metadata);
3597 av_freep(&s->programs[i]->stream_index);
3598 av_freep(&s->programs[i]);
3600 av_freep(&s->programs);
3601 av_freep(&s->priv_data);
3602 while (s->nb_chapters--) {
3603 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3604 av_freep(&s->chapters[s->nb_chapters]);
3606 av_freep(&s->chapters);
3607 av_dict_free(&s->metadata);
3608 av_freep(&s->streams);
3609 av_freep(&s->internal);
3613 #if FF_API_CLOSE_INPUT_FILE
3614 void av_close_input_file(AVFormatContext *s)
3616 avformat_close_input(&s);
3620 void avformat_close_input(AVFormatContext **ps)
3631 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3632 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3635 flush_packet_queue(s);
3638 if (s->iformat->read_close)
3639 s->iformat->read_close(s);
3641 avformat_free_context(s);
3648 #if FF_API_NEW_STREAM
3649 AVStream *av_new_stream(AVFormatContext *s, int id)
3651 AVStream *st = avformat_new_stream(s, NULL);
3658 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3664 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3666 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3669 s->streams = streams;
3671 st = av_mallocz(sizeof(AVStream));
3674 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3678 st->info->last_dts = AV_NOPTS_VALUE;
3680 st->codec = avcodec_alloc_context3(c);
3682 /* no default bitrate if decoding */
3683 st->codec->bit_rate = 0;
3684 st->index = s->nb_streams;
3685 st->start_time = AV_NOPTS_VALUE;
3686 st->duration = AV_NOPTS_VALUE;
3687 /* we set the current DTS to 0 so that formats without any timestamps
3688 * but durations get some timestamps, formats with some unknown
3689 * timestamps have their first few packets buffered and the
3690 * timestamps corrected before they are returned to the user */
3691 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3692 st->first_dts = AV_NOPTS_VALUE;
3693 st->probe_packets = MAX_PROBE_PACKETS;
3694 st->pts_wrap_reference = AV_NOPTS_VALUE;
3695 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3697 /* default pts setting is MPEG-like */
3698 avpriv_set_pts_info(st, 33, 1, 90000);
3699 st->last_IP_pts = AV_NOPTS_VALUE;
3700 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3701 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3702 st->pts_buffer[i] = AV_NOPTS_VALUE;
3704 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3706 #if FF_API_R_FRAME_RATE
3707 st->info->last_dts = AV_NOPTS_VALUE;
3709 st->info->fps_first_dts = AV_NOPTS_VALUE;
3710 st->info->fps_last_dts = AV_NOPTS_VALUE;
3712 st->inject_global_side_data = s->internal->inject_global_side_data;
3714 s->streams[s->nb_streams++] = st;
3718 AVProgram *av_new_program(AVFormatContext *ac, int id)
3720 AVProgram *program = NULL;
3723 av_dlog(ac, "new_program: id=0x%04x\n", id);
3725 for (i = 0; i < ac->nb_programs; i++)
3726 if (ac->programs[i]->id == id)
3727 program = ac->programs[i];
3730 program = av_mallocz(sizeof(AVProgram));
3733 dynarray_add(&ac->programs, &ac->nb_programs, program);
3734 program->discard = AVDISCARD_NONE;
3737 program->pts_wrap_reference = AV_NOPTS_VALUE;
3738 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3740 program->start_time =
3741 program->end_time = AV_NOPTS_VALUE;
3746 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3747 int64_t start, int64_t end, const char *title)
3749 AVChapter *chapter = NULL;
3752 for (i = 0; i < s->nb_chapters; i++)
3753 if (s->chapters[i]->id == id)
3754 chapter = s->chapters[i];
3757 chapter = av_mallocz(sizeof(AVChapter));
3760 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3762 av_dict_set(&chapter->metadata, "title", title, 0);
3764 chapter->time_base = time_base;
3765 chapter->start = start;
3771 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3774 AVProgram *program = NULL;
3777 if (idx >= ac->nb_streams) {
3778 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3782 for (i = 0; i < ac->nb_programs; i++) {
3783 if (ac->programs[i]->id != progid)
3785 program = ac->programs[i];
3786 for (j = 0; j < program->nb_stream_indexes; j++)
3787 if (program->stream_index[j] == idx)
3790 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3793 program->stream_index = tmp;
3794 program->stream_index[program->nb_stream_indexes++] = idx;
3799 static void print_fps(double d, const char *postfix)
3801 uint64_t v = lrintf(d * 100);
3803 av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3804 else if (v % (100 * 1000))
3805 av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3807 av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d / 1000, postfix);
3810 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3812 if (m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))) {
3813 AVDictionaryEntry *tag = NULL;
3815 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3816 while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX)))
3817 if (strcmp("language", tag->key)) {
3818 const char *p = tag->value;
3819 av_log(ctx, AV_LOG_INFO,
3820 "%s %-16s: ", indent, tag->key);
3823 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3824 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3825 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3827 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3828 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3831 av_log(ctx, AV_LOG_INFO, "\n");
3836 /* "user interface" functions */
3837 static void dump_stream_format(AVFormatContext *ic, int i,
3838 int index, int is_output)
3841 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3842 AVStream *st = ic->streams[i];
3843 int g = av_gcd(st->time_base.num, st->time_base.den);
3844 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3845 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3846 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3847 /* the pid is an important information, so we display it */
3848 /* XXX: add a generic system */
3849 if (flags & AVFMT_SHOW_IDS)
3850 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3852 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3853 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames,
3854 st->time_base.num / g, st->time_base.den / g);
3855 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3856 if (st->sample_aspect_ratio.num && // default
3857 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3858 AVRational display_aspect_ratio;
3859 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3860 st->codec->width * st->sample_aspect_ratio.num,
3861 st->codec->height * st->sample_aspect_ratio.den,
3863 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3864 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3865 display_aspect_ratio.num, display_aspect_ratio.den);
3867 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3868 if (st->avg_frame_rate.den && st->avg_frame_rate.num)
3869 print_fps(av_q2d(st->avg_frame_rate), "fps");
3870 #if FF_API_R_FRAME_RATE
3871 if (st->r_frame_rate.den && st->r_frame_rate.num)
3872 print_fps(av_q2d(st->r_frame_rate), "tbr");
3874 if (st->time_base.den && st->time_base.num)
3875 print_fps(1 / av_q2d(st->time_base), "tbn");
3876 if (st->codec->time_base.den && st->codec->time_base.num)
3877 print_fps(1 / av_q2d(st->codec->time_base), "tbc");
3879 if (st->disposition & AV_DISPOSITION_DEFAULT)
3880 av_log(NULL, AV_LOG_INFO, " (default)");
3881 if (st->disposition & AV_DISPOSITION_DUB)
3882 av_log(NULL, AV_LOG_INFO, " (dub)");
3883 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3884 av_log(NULL, AV_LOG_INFO, " (original)");
3885 if (st->disposition & AV_DISPOSITION_COMMENT)
3886 av_log(NULL, AV_LOG_INFO, " (comment)");
3887 if (st->disposition & AV_DISPOSITION_LYRICS)
3888 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3889 if (st->disposition & AV_DISPOSITION_KARAOKE)
3890 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3891 if (st->disposition & AV_DISPOSITION_FORCED)
3892 av_log(NULL, AV_LOG_INFO, " (forced)");
3893 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3894 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3895 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3896 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3897 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3898 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3899 av_log(NULL, AV_LOG_INFO, "\n");
3900 dump_metadata(NULL, st->metadata, " ");
3903 void av_dump_format(AVFormatContext *ic, int index,
3904 const char *url, int is_output)
3907 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3908 if (ic->nb_streams && !printed)
3911 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3912 is_output ? "Output" : "Input",
3914 is_output ? ic->oformat->name : ic->iformat->name,
3915 is_output ? "to" : "from", url);
3916 dump_metadata(NULL, ic->metadata, " ");
3918 av_log(NULL, AV_LOG_INFO, " Duration: ");
3919 if (ic->duration != AV_NOPTS_VALUE) {
3920 int hours, mins, secs, us;
3921 int64_t duration = ic->duration + 5000;
3922 secs = duration / AV_TIME_BASE;
3923 us = duration % AV_TIME_BASE;
3928 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3929 (100 * us) / AV_TIME_BASE);
3931 av_log(NULL, AV_LOG_INFO, "N/A");
3933 if (ic->start_time != AV_NOPTS_VALUE) {
3935 av_log(NULL, AV_LOG_INFO, ", start: ");
3936 secs = ic->start_time / AV_TIME_BASE;
3937 us = abs(ic->start_time % AV_TIME_BASE);
3938 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3939 secs, (int) av_rescale(us, 1000000, AV_TIME_BASE));
3941 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3943 av_log(NULL, AV_LOG_INFO, "%d kb/s", ic->bit_rate / 1000);
3945 av_log(NULL, AV_LOG_INFO, "N/A");
3946 av_log(NULL, AV_LOG_INFO, "\n");
3948 for (i = 0; i < ic->nb_chapters; i++) {
3949 AVChapter *ch = ic->chapters[i];
3950 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3951 av_log(NULL, AV_LOG_INFO,
3952 "start %f, ", ch->start * av_q2d(ch->time_base));
3953 av_log(NULL, AV_LOG_INFO,
3954 "end %f\n", ch->end * av_q2d(ch->time_base));
3956 dump_metadata(NULL, ch->metadata, " ");
3958 if (ic->nb_programs) {
3959 int j, k, total = 0;
3960 for (j = 0; j < ic->nb_programs; j++) {
3961 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3963 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3964 name ? name->value : "");
3965 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3966 for (k = 0; k < ic->programs[j]->nb_stream_indexes; k++) {
3967 dump_stream_format(ic, ic->programs[j]->stream_index[k],
3969 printed[ic->programs[j]->stream_index[k]] = 1;
3971 total += ic->programs[j]->nb_stream_indexes;
3973 if (total < ic->nb_streams)
3974 av_log(NULL, AV_LOG_INFO, " No Program\n");
3976 for (i = 0; i < ic->nb_streams; i++)
3978 dump_stream_format(ic, i, index, is_output);
3983 uint64_t ff_ntp_time(void)
3985 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3988 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3991 char *q, buf1[20], c;
3992 int nd, len, percentd_found;
4004 while (av_isdigit(*p))
4005 nd = nd * 10 + *p++ - '0';
4007 } while (av_isdigit(c));
4016 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4018 if ((q - buf + len) > buf_size - 1)
4020 memcpy(q, buf1, len);
4028 if ((q - buf) < buf_size - 1)
4032 if (!percentd_found)
4041 #define HEXDUMP_PRINT(...) \
4044 av_log(avcl, level, __VA_ARGS__); \
4046 fprintf(f, __VA_ARGS__); \
4049 static void hex_dump_internal(void *avcl, FILE *f, int level,
4050 const uint8_t *buf, int size)
4054 for (i = 0; i < size; i += 16) {
4058 HEXDUMP_PRINT("%08x ", i);
4059 for (j = 0; j < 16; j++) {
4061 HEXDUMP_PRINT(" %02x", buf[i + j]);
4066 for (j = 0; j < len; j++) {
4068 if (c < ' ' || c > '~')
4070 HEXDUMP_PRINT("%c", c);
4072 HEXDUMP_PRINT("\n");
4076 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
4078 hex_dump_internal(NULL, f, 0, buf, size);
4081 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
4083 hex_dump_internal(avcl, NULL, level, buf, size);
4086 static void pkt_dump_internal(void *avcl, FILE *f, int level, const AVPacket *pkt,
4087 int dump_payload, AVRational time_base)
4089 HEXDUMP_PRINT("stream #%d:\n", pkt->stream_index);
4090 HEXDUMP_PRINT(" keyframe=%d\n", (pkt->flags & AV_PKT_FLAG_KEY) != 0);
4091 HEXDUMP_PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4092 /* DTS is _always_ valid after av_read_frame() */
4093 HEXDUMP_PRINT(" dts=");
4094 if (pkt->dts == AV_NOPTS_VALUE)
4095 HEXDUMP_PRINT("N/A");
4097 HEXDUMP_PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4098 /* PTS may not be known if B-frames are present. */
4099 HEXDUMP_PRINT(" pts=");
4100 if (pkt->pts == AV_NOPTS_VALUE)
4101 HEXDUMP_PRINT("N/A");
4103 HEXDUMP_PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4104 HEXDUMP_PRINT("\n");
4105 HEXDUMP_PRINT(" size=%d\n", pkt->size);
4107 av_hex_dump(f, pkt->data, pkt->size);
4110 void av_pkt_dump2(FILE *f, const AVPacket *pkt, int dump_payload, const AVStream *st)
4112 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4115 void av_pkt_dump_log2(void *avcl, int level, const AVPacket *pkt, int dump_payload,
4118 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4121 void av_url_split(char *proto, int proto_size,
4122 char *authorization, int authorization_size,
4123 char *hostname, int hostname_size,
4124 int *port_ptr, char *path, int path_size, const char *url)
4126 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
4132 if (authorization_size > 0)
4133 authorization[0] = 0;
4134 if (hostname_size > 0)
4139 /* parse protocol */
4140 if ((p = strchr(url, ':'))) {
4141 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4148 /* no protocol means plain filename */
4149 av_strlcpy(path, url, path_size);
4153 /* separate path from hostname */
4154 ls = strchr(p, '/');
4155 ls2 = strchr(p, '?');
4159 ls = FFMIN(ls, ls2);
4161 av_strlcpy(path, ls, path_size);
4163 ls = &p[strlen(p)]; // XXX
4165 /* the rest is hostname, use that to parse auth/port */
4167 /* authorization (user[:pass]@hostname) */
4169 while ((at = strchr(p, '@')) && at < ls) {
4170 av_strlcpy(authorization, at2,
4171 FFMIN(authorization_size, at + 1 - at2));
4172 p = at + 1; /* skip '@' */
4175 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4177 av_strlcpy(hostname, p + 1,
4178 FFMIN(hostname_size, brk - p));
4179 if (brk[1] == ':' && port_ptr)
4180 *port_ptr = atoi(brk + 2);
4181 } else if ((col = strchr(p, ':')) && col < ls) {
4182 av_strlcpy(hostname, p,
4183 FFMIN(col + 1 - p, hostname_size));
4185 *port_ptr = atoi(col + 1);
4187 av_strlcpy(hostname, p,
4188 FFMIN(ls + 1 - p, hostname_size));
4192 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4195 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4198 'C', 'D', 'E', 'F' };
4199 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4202 'c', 'd', 'e', 'f' };
4203 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4205 for (i = 0; i < s; i++) {
4206 buff[i * 2] = hex_table[src[i] >> 4];
4207 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4213 int ff_hex_to_data(uint8_t *data, const char *p)
4220 p += strspn(p, SPACE_CHARS);
4223 c = av_toupper((unsigned char) *p++);
4224 if (c >= '0' && c <= '9')
4226 else if (c >= 'A' && c <= 'F')
4241 #if FF_API_SET_PTS_INFO
4242 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4243 unsigned int pts_num, unsigned int pts_den)
4245 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4249 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4250 unsigned int pts_num, unsigned int pts_den)
4253 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
4254 if (new_tb.num != pts_num)
4255 av_log(NULL, AV_LOG_DEBUG,
4256 "st:%d removing common factor %d from timebase\n",
4257 s->index, pts_num / new_tb.num);
4259 av_log(NULL, AV_LOG_WARNING,
4260 "st:%d has too large timebase, reducing\n", s->index);
4262 if (new_tb.num <= 0 || new_tb.den <= 0) {
4263 av_log(NULL, AV_LOG_ERROR,
4264 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
4265 new_tb.num, new_tb.den,
4269 s->time_base = new_tb;
4270 av_codec_set_pkt_timebase(s->codec, new_tb);
4271 s->pts_wrap_bits = pts_wrap_bits;
4274 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4277 const char *ptr = str;
4279 /* Parse key=value pairs. */
4282 char *dest = NULL, *dest_end;
4283 int key_len, dest_len = 0;
4285 /* Skip whitespace and potential commas. */
4286 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
4293 if (!(ptr = strchr(key, '=')))
4296 key_len = ptr - key;
4298 callback_get_buf(context, key, key_len, &dest, &dest_len);
4299 dest_end = dest + dest_len - 1;
4303 while (*ptr && *ptr != '\"') {
4307 if (dest && dest < dest_end)
4311 if (dest && dest < dest_end)
4319 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
4320 if (dest && dest < dest_end)
4328 int ff_find_stream_index(AVFormatContext *s, int id)
4331 for (i = 0; i < s->nb_streams; i++)
4332 if (s->streams[i]->id == id)
4337 int64_t ff_iso8601_to_unix_time(const char *datestr)
4339 struct tm time1 = { 0 }, time2 = { 0 };
4341 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4342 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4344 return av_timegm(&time2);
4346 return av_timegm(&time1);
4349 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id,
4353 if (ofmt->query_codec)
4354 return ofmt->query_codec(codec_id, std_compliance);
4355 else if (ofmt->codec_tag)
4356 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4357 else if (codec_id == ofmt->video_codec ||
4358 codec_id == ofmt->audio_codec ||
4359 codec_id == ofmt->subtitle_codec)
4362 return AVERROR_PATCHWELCOME;
4365 int avformat_network_init(void)
4369 ff_network_inited_globally = 1;
4370 if ((ret = ff_network_init()) < 0)
4377 int avformat_network_deinit(void)
4386 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4387 uint64_t channel_layout, int32_t sample_rate,
4388 int32_t width, int32_t height)
4394 return AVERROR(EINVAL);
4397 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4399 if (channel_layout) {
4401 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4405 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4407 if (width || height) {
4409 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4411 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4413 return AVERROR(ENOMEM);
4414 bytestream_put_le32(&data, flags);
4416 bytestream_put_le32(&data, channels);
4418 bytestream_put_le64(&data, channel_layout);
4420 bytestream_put_le32(&data, sample_rate);
4421 if (width || height) {
4422 bytestream_put_le32(&data, width);
4423 bytestream_put_le32(&data, height);
4428 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4430 AVRational undef = {0, 1};
4431 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4432 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4433 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4435 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4436 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4437 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4438 stream_sample_aspect_ratio = undef;
4440 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4441 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4442 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4443 frame_sample_aspect_ratio = undef;
4445 if (stream_sample_aspect_ratio.num)
4446 return stream_sample_aspect_ratio;
4448 return frame_sample_aspect_ratio;
4451 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4453 AVRational fr = st->r_frame_rate;
4454 AVRational codec_fr = av_inv_q(st->codec->time_base);
4455 AVRational avg_fr = st->avg_frame_rate;
4457 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4458 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4463 if (st->codec->ticks_per_frame > 1) {
4464 codec_fr.den *= st->codec->ticks_per_frame;
4465 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4466 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4473 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4476 if (*spec <= '9' && *spec >= '0') /* opt:index */
4477 return strtol(spec, NULL, 0) == st->index;
4478 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4479 *spec == 't') { /* opt:[vasdt] */
4480 enum AVMediaType type;
4483 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4484 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4485 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4486 case 'd': type = AVMEDIA_TYPE_DATA; break;
4487 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4488 default: av_assert0(0);
4490 if (type != st->codec->codec_type)
4492 if (*spec++ == ':') { /* possibly followed by :index */
4493 int i, index = strtol(spec, NULL, 0);
4494 for (i = 0; i < s->nb_streams; i++)
4495 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4496 return i == st->index;
4500 } else if (*spec == 'p' && *(spec + 1) == ':') {
4504 prog_id = strtol(spec, &endptr, 0);
4505 for (i = 0; i < s->nb_programs; i++) {
4506 if (s->programs[i]->id != prog_id)
4509 if (*endptr++ == ':') {
4510 int stream_idx = strtol(endptr, NULL, 0);
4511 return stream_idx >= 0 &&
4512 stream_idx < s->programs[i]->nb_stream_indexes &&
4513 st->index == s->programs[i]->stream_index[stream_idx];
4516 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4517 if (st->index == s->programs[i]->stream_index[j])
4521 } else if (*spec == '#' ||
4522 (*spec == 'i' && *(spec + 1) == ':')) {
4525 spec += 1 + (*spec == 'i');
4526 stream_id = strtol(spec, &endptr, 0);
4528 return stream_id == st->id;
4529 } else if (!*spec) /* empty specifier, matches everything */
4532 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4533 return AVERROR(EINVAL);
4536 int ff_generate_avci_extradata(AVStream *st)
4538 static const uint8_t avci100_1080p_extradata[] = {
4540 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4541 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4542 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4543 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4544 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4545 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4546 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4547 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4548 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4550 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4553 static const uint8_t avci100_1080i_extradata[] = {
4555 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4556 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4557 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4558 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4559 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4560 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4561 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4562 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4563 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4564 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4565 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
4567 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4570 static const uint8_t avci50_1080i_extradata[] = {
4572 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4573 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4574 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4575 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4576 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4577 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4578 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4579 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4580 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4581 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4582 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4584 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4587 static const uint8_t avci100_720p_extradata[] = {
4589 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4590 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4591 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4592 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4593 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4594 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4595 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4596 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4597 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4598 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4600 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4604 const uint8_t *data = NULL;
4607 if (st->codec->width == 1920) {
4608 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4609 data = avci100_1080p_extradata;
4610 size = sizeof(avci100_1080p_extradata);
4612 data = avci100_1080i_extradata;
4613 size = sizeof(avci100_1080i_extradata);
4615 } else if (st->codec->width == 1440) {
4616 data = avci50_1080i_extradata;
4617 size = sizeof(avci50_1080i_extradata);
4618 } else if (st->codec->width == 1280) {
4619 data = avci100_720p_extradata;
4620 size = sizeof(avci100_720p_extradata);
4626 av_freep(&st->codec->extradata);
4627 if (ff_alloc_extradata(st->codec, size))
4628 return AVERROR(ENOMEM);
4629 memcpy(st->codec->extradata, data, size);