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);
3027 av_freep(&st->info->duration_error);
3028 st->info->last_dts = AV_NOPTS_VALUE;
3029 st->info->duration_count = 0;
3030 st->info->rfps_duration_sum = 0;
3034 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
3036 int i, count, ret = 0, j;
3039 AVPacket pkt1, *pkt;
3040 int64_t old_offset = avio_tell(ic->pb);
3041 // new streams might appear, no options for those
3042 int orig_nb_streams = ic->nb_streams;
3043 int flush_codecs = ic->probesize > 0;
3046 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
3047 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
3049 for (i = 0; i < ic->nb_streams; i++) {
3050 const AVCodec *codec;
3051 AVDictionary *thread_opt = NULL;
3052 st = ic->streams[i];
3054 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3055 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3056 /* if (!st->time_base.num)
3058 if (!st->codec->time_base.num)
3059 st->codec->time_base = st->time_base;
3061 // only for the split stuff
3062 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
3063 st->parser = av_parser_init(st->codec->codec_id);
3065 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3066 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3067 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3068 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3070 } else if (st->need_parsing) {
3071 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3072 "%s, packets or times may be invalid.\n",
3073 avcodec_get_name(st->codec->codec_id));
3076 codec = find_decoder(ic, st, st->codec->codec_id);
3078 /* Force thread count to 1 since the H.264 decoder will not extract
3079 * SPS and PPS to extradata during multi-threaded decoding. */
3080 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3082 /* Ensure that subtitle_header is properly set. */
3083 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3084 && codec && !st->codec->codec) {
3085 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3086 av_log(ic, AV_LOG_WARNING,
3087 "Failed to open codec in av_find_stream_info\n");
3090 // Try to just open decoders, in case this is enough to get parameters.
3091 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3092 if (codec && !st->codec->codec)
3093 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3094 av_log(ic, AV_LOG_WARNING,
3095 "Failed to open codec in av_find_stream_info\n");
3098 av_dict_free(&thread_opt);
3101 for (i = 0; i < ic->nb_streams; i++) {
3102 #if FF_API_R_FRAME_RATE
3103 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3105 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3106 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3112 if (ff_check_interrupt(&ic->interrupt_callback)) {
3114 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3118 /* check if one codec still needs to be handled */
3119 for (i = 0; i < ic->nb_streams; i++) {
3120 int fps_analyze_framecount = 20;
3122 st = ic->streams[i];
3123 if (!has_codec_parameters(st, NULL))
3125 /* If the timebase is coarse (like the usual millisecond precision
3126 * of mkv), we need to analyze more frames to reliably arrive at
3127 * the correct fps. */
3128 if (av_q2d(st->time_base) > 0.0005)
3129 fps_analyze_framecount *= 2;
3130 if (ic->fps_probe_size >= 0)
3131 fps_analyze_framecount = ic->fps_probe_size;
3132 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3133 fps_analyze_framecount = 0;
3134 /* variable fps and no guess at the real fps */
3135 if (tb_unreliable(st->codec) &&
3136 !(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3137 st->info->duration_count < fps_analyze_framecount &&
3138 st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3140 if (st->parser && st->parser->parser->split &&
3141 !st->codec->extradata)
3143 if (st->first_dts == AV_NOPTS_VALUE &&
3144 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3145 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3148 if (i == ic->nb_streams) {
3149 /* NOTE: If the format has no header, then we need to read some
3150 * packets to get most of the streams, so we cannot stop here. */
3151 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3152 /* If we found the info for all the codecs, we can stop. */
3154 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3159 /* We did not get all the codec info, but we read too much data. */
3160 if (read_size >= ic->probesize) {
3162 av_log(ic, AV_LOG_DEBUG,
3163 "Probe buffer size limit of %d bytes reached\n", ic->probesize);
3164 for (i = 0; i < ic->nb_streams; i++)
3165 if (!ic->streams[i]->r_frame_rate.num &&
3166 ic->streams[i]->info->duration_count <= 1 &&
3167 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3168 strcmp(ic->iformat->name, "image2"))
3169 av_log(ic, AV_LOG_WARNING,
3170 "Stream #%d: not enough frames to estimate rate; "
3171 "consider increasing probesize\n", i);
3175 /* NOTE: A new stream can be added there if no header in file
3176 * (AVFMTCTX_NOHEADER). */
3177 ret = read_frame_internal(ic, &pkt1);
3178 if (ret == AVERROR(EAGAIN))
3186 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3187 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
3189 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
3190 &ic->packet_buffer_end);
3192 ret = AVERROR(ENOMEM);
3193 goto find_stream_info_err;
3195 if ((ret = av_dup_packet(pkt)) < 0)
3196 goto find_stream_info_err;
3199 st = ic->streams[pkt->stream_index];
3200 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3201 read_size += pkt->size;
3203 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3204 /* check for non-increasing dts */
3205 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3206 st->info->fps_last_dts >= pkt->dts) {
3207 av_log(ic, AV_LOG_DEBUG,
3208 "Non-increasing DTS in stream %d: packet %d with DTS "
3209 "%"PRId64", packet %d with DTS %"PRId64"\n",
3210 st->index, st->info->fps_last_dts_idx,
3211 st->info->fps_last_dts, st->codec_info_nb_frames,
3213 st->info->fps_first_dts =
3214 st->info->fps_last_dts = AV_NOPTS_VALUE;
3216 /* Check for a discontinuity in dts. If the difference in dts
3217 * is more than 1000 times the average packet duration in the
3218 * sequence, we treat it as a discontinuity. */
3219 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3220 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3221 (pkt->dts - st->info->fps_last_dts) / 1000 >
3222 (st->info->fps_last_dts - st->info->fps_first_dts) /
3223 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3224 av_log(ic, AV_LOG_WARNING,
3225 "DTS discontinuity in stream %d: packet %d with DTS "
3226 "%"PRId64", packet %d with DTS %"PRId64"\n",
3227 st->index, st->info->fps_last_dts_idx,
3228 st->info->fps_last_dts, st->codec_info_nb_frames,
3230 st->info->fps_first_dts =
3231 st->info->fps_last_dts = AV_NOPTS_VALUE;
3234 /* update stored dts values */
3235 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3236 st->info->fps_first_dts = pkt->dts;
3237 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3239 st->info->fps_last_dts = pkt->dts;
3240 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3242 if (st->codec_info_nb_frames>1) {
3244 if (st->time_base.den > 0)
3245 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3246 if (st->avg_frame_rate.num > 0)
3247 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3250 && st->codec_info_nb_frames>30
3251 && st->info->fps_first_dts != AV_NOPTS_VALUE
3252 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3253 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3255 if (t >= ic->max_analyze_duration) {
3256 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %d reached at %"PRId64" microseconds\n",
3257 ic->max_analyze_duration,
3261 if (pkt->duration) {
3262 st->info->codec_info_duration += pkt->duration;
3263 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3266 #if FF_API_R_FRAME_RATE
3267 ff_rfps_add_frame(ic, st, pkt->dts);
3269 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3270 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3271 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3272 if (ff_alloc_extradata(st->codec, i))
3273 return AVERROR(ENOMEM);
3274 memcpy(st->codec->extradata, pkt->data,
3275 st->codec->extradata_size);
3279 /* If still no information, we try to open the codec and to
3280 * decompress the frame. We try to avoid that in most cases as
3281 * it takes longer and uses more memory. For MPEG-4, we need to
3282 * decompress for QuickTime.
3284 * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3285 * least one frame of codec data, this makes sure the codec initializes
3286 * the channel configuration and does not only trust the values from
3288 try_decode_frame(ic, st, pkt,
3289 (options && i < orig_nb_streams) ? &options[i] : NULL);
3291 st->codec_info_nb_frames++;
3296 AVPacket empty_pkt = { 0 };
3298 av_init_packet(&empty_pkt);
3300 for (i = 0; i < ic->nb_streams; i++) {
3302 st = ic->streams[i];
3304 /* flush the decoders */
3305 if (st->info->found_decoder == 1) {
3307 err = try_decode_frame(ic, st, &empty_pkt,
3308 (options && i < orig_nb_streams)
3309 ? &options[i] : NULL);
3310 } while (err > 0 && !has_codec_parameters(st, NULL));
3313 av_log(ic, AV_LOG_INFO,
3314 "decoding for stream %d failed\n", st->index);
3320 // close codecs which were opened in try_decode_frame()
3321 for (i = 0; i < ic->nb_streams; i++) {
3322 st = ic->streams[i];
3323 avcodec_close(st->codec);
3326 ff_rfps_calculate(ic);
3328 for (i = 0; i < ic->nb_streams; i++) {
3329 st = ic->streams[i];
3330 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3331 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3332 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3333 if (avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
3334 st->codec->codec_tag= tag;
3337 /* estimate average framerate if not set by demuxer */
3338 if (st->info->codec_info_duration_fields &&
3339 !st->avg_frame_rate.num &&
3340 st->info->codec_info_duration) {
3342 double best_error = 0.01;
3344 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3345 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3346 st->info->codec_info_duration < 0)
3348 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3349 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3350 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3352 /* Round guessed framerate to a "standard" framerate if it's
3353 * within 1% of the original estimate. */
3354 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3355 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3356 double error = fabs(av_q2d(st->avg_frame_rate) /
3357 av_q2d(std_fps) - 1);
3359 if (error < best_error) {
3361 best_fps = std_fps.num;
3365 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3366 best_fps, 12 * 1001, INT_MAX);
3369 if (!st->r_frame_rate.num) {
3370 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3371 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3372 st->r_frame_rate.num = st->codec->time_base.den;
3373 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3375 st->r_frame_rate.num = st->time_base.den;
3376 st->r_frame_rate.den = st->time_base.num;
3379 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3380 if (!st->codec->bits_per_coded_sample)
3381 st->codec->bits_per_coded_sample =
3382 av_get_bits_per_sample(st->codec->codec_id);
3383 // set stream disposition based on audio service type
3384 switch (st->codec->audio_service_type) {
3385 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3386 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3388 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3389 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3391 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3392 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3394 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3395 st->disposition = AV_DISPOSITION_COMMENT;
3397 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3398 st->disposition = AV_DISPOSITION_KARAOKE;
3405 estimate_timings(ic, old_offset);
3407 if (ret >= 0 && ic->nb_streams)
3408 /* We could not have all the codec parameters before EOF. */
3410 for (i = 0; i < ic->nb_streams; i++) {
3412 st = ic->streams[i];
3413 if (!has_codec_parameters(st, &errmsg)) {
3415 avcodec_string(buf, sizeof(buf), st->codec, 0);
3416 av_log(ic, AV_LOG_WARNING,
3417 "Could not find codec parameters for stream %d (%s): %s\n"
3418 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3425 compute_chapters_end(ic);
3427 find_stream_info_err:
3428 for (i = 0; i < ic->nb_streams; i++) {
3429 st = ic->streams[i];
3430 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3431 ic->streams[i]->codec->thread_count = 0;
3433 av_freep(&st->info->duration_error);
3434 av_freep(&ic->streams[i]->info);
3437 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3438 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3442 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3446 for (i = 0; i < ic->nb_programs; i++) {
3447 if (ic->programs[i] == last) {
3451 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3452 if (ic->programs[i]->stream_index[j] == s)
3453 return ic->programs[i];
3459 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3460 int wanted_stream_nb, int related_stream,
3461 AVCodec **decoder_ret, int flags)
3463 int i, nb_streams = ic->nb_streams;
3464 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3465 unsigned *program = NULL;
3466 AVCodec *decoder = NULL, *best_decoder = NULL;
3468 if (related_stream >= 0 && wanted_stream_nb < 0) {
3469 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3471 program = p->stream_index;
3472 nb_streams = p->nb_stream_indexes;
3475 for (i = 0; i < nb_streams; i++) {
3476 int real_stream_index = program ? program[i] : i;
3477 AVStream *st = ic->streams[real_stream_index];
3478 AVCodecContext *avctx = st->codec;
3479 if (avctx->codec_type != type)
3481 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3483 if (wanted_stream_nb != real_stream_index &&
3484 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3485 AV_DISPOSITION_VISUAL_IMPAIRED))
3487 if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels)
3490 decoder = find_decoder(ic, st, st->codec->codec_id);
3493 ret = AVERROR_DECODER_NOT_FOUND;
3497 count = st->codec_info_nb_frames;
3498 bitrate = avctx->bit_rate;
3499 multiframe = FFMIN(5, count);
3500 if ((best_multiframe > multiframe) ||
3501 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3502 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3505 best_bitrate = bitrate;
3506 best_multiframe = multiframe;
3507 ret = real_stream_index;
3508 best_decoder = decoder;
3509 if (program && i == nb_streams - 1 && ret < 0) {
3511 nb_streams = ic->nb_streams;
3512 /* no related stream found, try again with everything */
3517 *decoder_ret = best_decoder;
3521 /*******************************************************/
3523 int av_read_play(AVFormatContext *s)
3525 if (s->iformat->read_play)
3526 return s->iformat->read_play(s);
3528 return avio_pause(s->pb, 0);
3529 return AVERROR(ENOSYS);
3532 int av_read_pause(AVFormatContext *s)
3534 if (s->iformat->read_pause)
3535 return s->iformat->read_pause(s);
3537 return avio_pause(s->pb, 1);
3538 return AVERROR(ENOSYS);
3541 void ff_free_stream(AVFormatContext *s, AVStream *st) {
3543 av_assert0(s->nb_streams>0);
3544 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3546 for (j = 0; j < st->nb_side_data; j++)
3547 av_freep(&st->side_data[j].data);
3548 av_freep(&st->side_data);
3549 st->nb_side_data = 0;
3552 av_parser_close(st->parser);
3554 if (st->attached_pic.data)
3555 av_free_packet(&st->attached_pic);
3556 av_dict_free(&st->metadata);
3557 av_freep(&st->probe_data.buf);
3558 av_freep(&st->index_entries);
3559 av_freep(&st->codec->extradata);
3560 av_freep(&st->codec->subtitle_header);
3561 av_freep(&st->codec);
3562 av_freep(&st->priv_data);
3564 av_freep(&st->info->duration_error);
3565 av_freep(&st->info);
3566 av_freep(&s->streams[ --s->nb_streams ]);
3569 void avformat_free_context(AVFormatContext *s)
3577 if (s->iformat && s->iformat->priv_class && s->priv_data)
3578 av_opt_free(s->priv_data);
3579 if (s->oformat && s->oformat->priv_class && s->priv_data)
3580 av_opt_free(s->priv_data);
3582 for (i = s->nb_streams - 1; i >= 0; i--) {
3583 ff_free_stream(s, s->streams[i]);
3585 for (i = s->nb_programs - 1; i >= 0; i--) {
3586 av_dict_free(&s->programs[i]->metadata);
3587 av_freep(&s->programs[i]->stream_index);
3588 av_freep(&s->programs[i]);
3590 av_freep(&s->programs);
3591 av_freep(&s->priv_data);
3592 while (s->nb_chapters--) {
3593 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3594 av_freep(&s->chapters[s->nb_chapters]);
3596 av_freep(&s->chapters);
3597 av_dict_free(&s->metadata);
3598 av_freep(&s->streams);
3599 av_freep(&s->internal);
3603 #if FF_API_CLOSE_INPUT_FILE
3604 void av_close_input_file(AVFormatContext *s)
3606 avformat_close_input(&s);
3610 void avformat_close_input(AVFormatContext **ps)
3621 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3622 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3625 flush_packet_queue(s);
3628 if (s->iformat->read_close)
3629 s->iformat->read_close(s);
3631 avformat_free_context(s);
3638 #if FF_API_NEW_STREAM
3639 AVStream *av_new_stream(AVFormatContext *s, int id)
3641 AVStream *st = avformat_new_stream(s, NULL);
3648 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3654 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3656 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3659 s->streams = streams;
3661 st = av_mallocz(sizeof(AVStream));
3664 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3668 st->info->last_dts = AV_NOPTS_VALUE;
3670 st->codec = avcodec_alloc_context3(c);
3672 /* no default bitrate if decoding */
3673 st->codec->bit_rate = 0;
3674 st->index = s->nb_streams;
3675 st->start_time = AV_NOPTS_VALUE;
3676 st->duration = AV_NOPTS_VALUE;
3677 /* we set the current DTS to 0 so that formats without any timestamps
3678 * but durations get some timestamps, formats with some unknown
3679 * timestamps have their first few packets buffered and the
3680 * timestamps corrected before they are returned to the user */
3681 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3682 st->first_dts = AV_NOPTS_VALUE;
3683 st->probe_packets = MAX_PROBE_PACKETS;
3684 st->pts_wrap_reference = AV_NOPTS_VALUE;
3685 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3687 /* default pts setting is MPEG-like */
3688 avpriv_set_pts_info(st, 33, 1, 90000);
3689 st->last_IP_pts = AV_NOPTS_VALUE;
3690 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3691 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3692 st->pts_buffer[i] = AV_NOPTS_VALUE;
3694 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3696 #if FF_API_R_FRAME_RATE
3697 st->info->last_dts = AV_NOPTS_VALUE;
3699 st->info->fps_first_dts = AV_NOPTS_VALUE;
3700 st->info->fps_last_dts = AV_NOPTS_VALUE;
3702 st->inject_global_side_data = s->internal->inject_global_side_data;
3704 s->streams[s->nb_streams++] = st;
3708 AVProgram *av_new_program(AVFormatContext *ac, int id)
3710 AVProgram *program = NULL;
3713 av_dlog(ac, "new_program: id=0x%04x\n", id);
3715 for (i = 0; i < ac->nb_programs; i++)
3716 if (ac->programs[i]->id == id)
3717 program = ac->programs[i];
3720 program = av_mallocz(sizeof(AVProgram));
3723 dynarray_add(&ac->programs, &ac->nb_programs, program);
3724 program->discard = AVDISCARD_NONE;
3727 program->pts_wrap_reference = AV_NOPTS_VALUE;
3728 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3730 program->start_time =
3731 program->end_time = AV_NOPTS_VALUE;
3736 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3737 int64_t start, int64_t end, const char *title)
3739 AVChapter *chapter = NULL;
3742 for (i = 0; i < s->nb_chapters; i++)
3743 if (s->chapters[i]->id == id)
3744 chapter = s->chapters[i];
3747 chapter = av_mallocz(sizeof(AVChapter));
3750 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3752 av_dict_set(&chapter->metadata, "title", title, 0);
3754 chapter->time_base = time_base;
3755 chapter->start = start;
3761 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3764 AVProgram *program = NULL;
3767 if (idx >= ac->nb_streams) {
3768 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3772 for (i = 0; i < ac->nb_programs; i++) {
3773 if (ac->programs[i]->id != progid)
3775 program = ac->programs[i];
3776 for (j = 0; j < program->nb_stream_indexes; j++)
3777 if (program->stream_index[j] == idx)
3780 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3783 program->stream_index = tmp;
3784 program->stream_index[program->nb_stream_indexes++] = idx;
3789 static void print_fps(double d, const char *postfix)
3791 uint64_t v = lrintf(d * 100);
3793 av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3794 else if (v % (100 * 1000))
3795 av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3797 av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d / 1000, postfix);
3800 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3802 if (m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))) {
3803 AVDictionaryEntry *tag = NULL;
3805 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3806 while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX)))
3807 if (strcmp("language", tag->key)) {
3808 const char *p = tag->value;
3809 av_log(ctx, AV_LOG_INFO,
3810 "%s %-16s: ", indent, tag->key);
3813 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3814 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3815 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3817 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3818 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3821 av_log(ctx, AV_LOG_INFO, "\n");
3826 /* "user interface" functions */
3827 static void dump_stream_format(AVFormatContext *ic, int i,
3828 int index, int is_output)
3831 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3832 AVStream *st = ic->streams[i];
3833 int g = av_gcd(st->time_base.num, st->time_base.den);
3834 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3835 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3836 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3837 /* the pid is an important information, so we display it */
3838 /* XXX: add a generic system */
3839 if (flags & AVFMT_SHOW_IDS)
3840 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3842 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3843 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames,
3844 st->time_base.num / g, st->time_base.den / g);
3845 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3846 if (st->sample_aspect_ratio.num && // default
3847 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3848 AVRational display_aspect_ratio;
3849 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3850 st->codec->width * st->sample_aspect_ratio.num,
3851 st->codec->height * st->sample_aspect_ratio.den,
3853 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3854 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3855 display_aspect_ratio.num, display_aspect_ratio.den);
3857 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3858 if (st->avg_frame_rate.den && st->avg_frame_rate.num)
3859 print_fps(av_q2d(st->avg_frame_rate), "fps");
3860 #if FF_API_R_FRAME_RATE
3861 if (st->r_frame_rate.den && st->r_frame_rate.num)
3862 print_fps(av_q2d(st->r_frame_rate), "tbr");
3864 if (st->time_base.den && st->time_base.num)
3865 print_fps(1 / av_q2d(st->time_base), "tbn");
3866 if (st->codec->time_base.den && st->codec->time_base.num)
3867 print_fps(1 / av_q2d(st->codec->time_base), "tbc");
3869 if (st->disposition & AV_DISPOSITION_DEFAULT)
3870 av_log(NULL, AV_LOG_INFO, " (default)");
3871 if (st->disposition & AV_DISPOSITION_DUB)
3872 av_log(NULL, AV_LOG_INFO, " (dub)");
3873 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3874 av_log(NULL, AV_LOG_INFO, " (original)");
3875 if (st->disposition & AV_DISPOSITION_COMMENT)
3876 av_log(NULL, AV_LOG_INFO, " (comment)");
3877 if (st->disposition & AV_DISPOSITION_LYRICS)
3878 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3879 if (st->disposition & AV_DISPOSITION_KARAOKE)
3880 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3881 if (st->disposition & AV_DISPOSITION_FORCED)
3882 av_log(NULL, AV_LOG_INFO, " (forced)");
3883 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3884 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3885 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3886 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3887 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3888 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3889 av_log(NULL, AV_LOG_INFO, "\n");
3890 dump_metadata(NULL, st->metadata, " ");
3893 void av_dump_format(AVFormatContext *ic, int index,
3894 const char *url, int is_output)
3897 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3898 if (ic->nb_streams && !printed)
3901 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3902 is_output ? "Output" : "Input",
3904 is_output ? ic->oformat->name : ic->iformat->name,
3905 is_output ? "to" : "from", url);
3906 dump_metadata(NULL, ic->metadata, " ");
3908 av_log(NULL, AV_LOG_INFO, " Duration: ");
3909 if (ic->duration != AV_NOPTS_VALUE) {
3910 int hours, mins, secs, us;
3911 int64_t duration = ic->duration + 5000;
3912 secs = duration / AV_TIME_BASE;
3913 us = duration % AV_TIME_BASE;
3918 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3919 (100 * us) / AV_TIME_BASE);
3921 av_log(NULL, AV_LOG_INFO, "N/A");
3923 if (ic->start_time != AV_NOPTS_VALUE) {
3925 av_log(NULL, AV_LOG_INFO, ", start: ");
3926 secs = ic->start_time / AV_TIME_BASE;
3927 us = abs(ic->start_time % AV_TIME_BASE);
3928 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3929 secs, (int) av_rescale(us, 1000000, AV_TIME_BASE));
3931 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3933 av_log(NULL, AV_LOG_INFO, "%d kb/s", ic->bit_rate / 1000);
3935 av_log(NULL, AV_LOG_INFO, "N/A");
3936 av_log(NULL, AV_LOG_INFO, "\n");
3938 for (i = 0; i < ic->nb_chapters; i++) {
3939 AVChapter *ch = ic->chapters[i];
3940 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3941 av_log(NULL, AV_LOG_INFO,
3942 "start %f, ", ch->start * av_q2d(ch->time_base));
3943 av_log(NULL, AV_LOG_INFO,
3944 "end %f\n", ch->end * av_q2d(ch->time_base));
3946 dump_metadata(NULL, ch->metadata, " ");
3948 if (ic->nb_programs) {
3949 int j, k, total = 0;
3950 for (j = 0; j < ic->nb_programs; j++) {
3951 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3953 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3954 name ? name->value : "");
3955 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3956 for (k = 0; k < ic->programs[j]->nb_stream_indexes; k++) {
3957 dump_stream_format(ic, ic->programs[j]->stream_index[k],
3959 printed[ic->programs[j]->stream_index[k]] = 1;
3961 total += ic->programs[j]->nb_stream_indexes;
3963 if (total < ic->nb_streams)
3964 av_log(NULL, AV_LOG_INFO, " No Program\n");
3966 for (i = 0; i < ic->nb_streams; i++)
3968 dump_stream_format(ic, i, index, is_output);
3973 uint64_t ff_ntp_time(void)
3975 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3978 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3981 char *q, buf1[20], c;
3982 int nd, len, percentd_found;
3994 while (av_isdigit(*p))
3995 nd = nd * 10 + *p++ - '0';
3997 } while (av_isdigit(c));
4006 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4008 if ((q - buf + len) > buf_size - 1)
4010 memcpy(q, buf1, len);
4018 if ((q - buf) < buf_size - 1)
4022 if (!percentd_found)
4031 #define HEXDUMP_PRINT(...) \
4034 av_log(avcl, level, __VA_ARGS__); \
4036 fprintf(f, __VA_ARGS__); \
4039 static void hex_dump_internal(void *avcl, FILE *f, int level,
4040 const uint8_t *buf, int size)
4044 for (i = 0; i < size; i += 16) {
4048 HEXDUMP_PRINT("%08x ", i);
4049 for (j = 0; j < 16; j++) {
4051 HEXDUMP_PRINT(" %02x", buf[i + j]);
4056 for (j = 0; j < len; j++) {
4058 if (c < ' ' || c > '~')
4060 HEXDUMP_PRINT("%c", c);
4062 HEXDUMP_PRINT("\n");
4066 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
4068 hex_dump_internal(NULL, f, 0, buf, size);
4071 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
4073 hex_dump_internal(avcl, NULL, level, buf, size);
4076 static void pkt_dump_internal(void *avcl, FILE *f, int level, const AVPacket *pkt,
4077 int dump_payload, AVRational time_base)
4079 HEXDUMP_PRINT("stream #%d:\n", pkt->stream_index);
4080 HEXDUMP_PRINT(" keyframe=%d\n", (pkt->flags & AV_PKT_FLAG_KEY) != 0);
4081 HEXDUMP_PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4082 /* DTS is _always_ valid after av_read_frame() */
4083 HEXDUMP_PRINT(" dts=");
4084 if (pkt->dts == AV_NOPTS_VALUE)
4085 HEXDUMP_PRINT("N/A");
4087 HEXDUMP_PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4088 /* PTS may not be known if B-frames are present. */
4089 HEXDUMP_PRINT(" pts=");
4090 if (pkt->pts == AV_NOPTS_VALUE)
4091 HEXDUMP_PRINT("N/A");
4093 HEXDUMP_PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4094 HEXDUMP_PRINT("\n");
4095 HEXDUMP_PRINT(" size=%d\n", pkt->size);
4097 av_hex_dump(f, pkt->data, pkt->size);
4100 void av_pkt_dump2(FILE *f, const AVPacket *pkt, int dump_payload, const AVStream *st)
4102 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4105 void av_pkt_dump_log2(void *avcl, int level, const AVPacket *pkt, int dump_payload,
4108 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4111 void av_url_split(char *proto, int proto_size,
4112 char *authorization, int authorization_size,
4113 char *hostname, int hostname_size,
4114 int *port_ptr, char *path, int path_size, const char *url)
4116 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
4122 if (authorization_size > 0)
4123 authorization[0] = 0;
4124 if (hostname_size > 0)
4129 /* parse protocol */
4130 if ((p = strchr(url, ':'))) {
4131 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4138 /* no protocol means plain filename */
4139 av_strlcpy(path, url, path_size);
4143 /* separate path from hostname */
4144 ls = strchr(p, '/');
4145 ls2 = strchr(p, '?');
4149 ls = FFMIN(ls, ls2);
4151 av_strlcpy(path, ls, path_size);
4153 ls = &p[strlen(p)]; // XXX
4155 /* the rest is hostname, use that to parse auth/port */
4157 /* authorization (user[:pass]@hostname) */
4159 while ((at = strchr(p, '@')) && at < ls) {
4160 av_strlcpy(authorization, at2,
4161 FFMIN(authorization_size, at + 1 - at2));
4162 p = at + 1; /* skip '@' */
4165 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4167 av_strlcpy(hostname, p + 1,
4168 FFMIN(hostname_size, brk - p));
4169 if (brk[1] == ':' && port_ptr)
4170 *port_ptr = atoi(brk + 2);
4171 } else if ((col = strchr(p, ':')) && col < ls) {
4172 av_strlcpy(hostname, p,
4173 FFMIN(col + 1 - p, hostname_size));
4175 *port_ptr = atoi(col + 1);
4177 av_strlcpy(hostname, p,
4178 FFMIN(ls + 1 - p, hostname_size));
4182 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4185 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4188 'C', 'D', 'E', 'F' };
4189 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4192 'c', 'd', 'e', 'f' };
4193 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4195 for (i = 0; i < s; i++) {
4196 buff[i * 2] = hex_table[src[i] >> 4];
4197 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4203 int ff_hex_to_data(uint8_t *data, const char *p)
4210 p += strspn(p, SPACE_CHARS);
4213 c = av_toupper((unsigned char) *p++);
4214 if (c >= '0' && c <= '9')
4216 else if (c >= 'A' && c <= 'F')
4231 #if FF_API_SET_PTS_INFO
4232 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4233 unsigned int pts_num, unsigned int pts_den)
4235 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4239 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4240 unsigned int pts_num, unsigned int pts_den)
4243 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
4244 if (new_tb.num != pts_num)
4245 av_log(NULL, AV_LOG_DEBUG,
4246 "st:%d removing common factor %d from timebase\n",
4247 s->index, pts_num / new_tb.num);
4249 av_log(NULL, AV_LOG_WARNING,
4250 "st:%d has too large timebase, reducing\n", s->index);
4252 if (new_tb.num <= 0 || new_tb.den <= 0) {
4253 av_log(NULL, AV_LOG_ERROR,
4254 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
4255 new_tb.num, new_tb.den,
4259 s->time_base = new_tb;
4260 av_codec_set_pkt_timebase(s->codec, new_tb);
4261 s->pts_wrap_bits = pts_wrap_bits;
4264 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4267 const char *ptr = str;
4269 /* Parse key=value pairs. */
4272 char *dest = NULL, *dest_end;
4273 int key_len, dest_len = 0;
4275 /* Skip whitespace and potential commas. */
4276 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
4283 if (!(ptr = strchr(key, '=')))
4286 key_len = ptr - key;
4288 callback_get_buf(context, key, key_len, &dest, &dest_len);
4289 dest_end = dest + dest_len - 1;
4293 while (*ptr && *ptr != '\"') {
4297 if (dest && dest < dest_end)
4301 if (dest && dest < dest_end)
4309 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
4310 if (dest && dest < dest_end)
4318 int ff_find_stream_index(AVFormatContext *s, int id)
4321 for (i = 0; i < s->nb_streams; i++)
4322 if (s->streams[i]->id == id)
4327 int64_t ff_iso8601_to_unix_time(const char *datestr)
4329 struct tm time1 = { 0 }, time2 = { 0 };
4331 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4332 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4334 return av_timegm(&time2);
4336 return av_timegm(&time1);
4339 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id,
4343 if (ofmt->query_codec)
4344 return ofmt->query_codec(codec_id, std_compliance);
4345 else if (ofmt->codec_tag)
4346 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4347 else if (codec_id == ofmt->video_codec ||
4348 codec_id == ofmt->audio_codec ||
4349 codec_id == ofmt->subtitle_codec)
4352 return AVERROR_PATCHWELCOME;
4355 int avformat_network_init(void)
4359 ff_network_inited_globally = 1;
4360 if ((ret = ff_network_init()) < 0)
4367 int avformat_network_deinit(void)
4376 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4377 uint64_t channel_layout, int32_t sample_rate,
4378 int32_t width, int32_t height)
4384 return AVERROR(EINVAL);
4387 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4389 if (channel_layout) {
4391 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4395 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4397 if (width || height) {
4399 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4401 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4403 return AVERROR(ENOMEM);
4404 bytestream_put_le32(&data, flags);
4406 bytestream_put_le32(&data, channels);
4408 bytestream_put_le64(&data, channel_layout);
4410 bytestream_put_le32(&data, sample_rate);
4411 if (width || height) {
4412 bytestream_put_le32(&data, width);
4413 bytestream_put_le32(&data, height);
4418 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4420 AVRational undef = {0, 1};
4421 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4422 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4423 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4425 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4426 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4427 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4428 stream_sample_aspect_ratio = undef;
4430 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4431 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4432 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4433 frame_sample_aspect_ratio = undef;
4435 if (stream_sample_aspect_ratio.num)
4436 return stream_sample_aspect_ratio;
4438 return frame_sample_aspect_ratio;
4441 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4443 AVRational fr = st->r_frame_rate;
4444 AVRational codec_fr = av_inv_q(st->codec->time_base);
4445 AVRational avg_fr = st->avg_frame_rate;
4447 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4448 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4453 if (st->codec->ticks_per_frame > 1) {
4454 codec_fr.den *= st->codec->ticks_per_frame;
4455 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4456 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4463 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4466 if (*spec <= '9' && *spec >= '0') /* opt:index */
4467 return strtol(spec, NULL, 0) == st->index;
4468 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4469 *spec == 't') { /* opt:[vasdt] */
4470 enum AVMediaType type;
4473 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4474 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4475 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4476 case 'd': type = AVMEDIA_TYPE_DATA; break;
4477 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4478 default: av_assert0(0);
4480 if (type != st->codec->codec_type)
4482 if (*spec++ == ':') { /* possibly followed by :index */
4483 int i, index = strtol(spec, NULL, 0);
4484 for (i = 0; i < s->nb_streams; i++)
4485 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4486 return i == st->index;
4490 } else if (*spec == 'p' && *(spec + 1) == ':') {
4494 prog_id = strtol(spec, &endptr, 0);
4495 for (i = 0; i < s->nb_programs; i++) {
4496 if (s->programs[i]->id != prog_id)
4499 if (*endptr++ == ':') {
4500 int stream_idx = strtol(endptr, NULL, 0);
4501 return stream_idx >= 0 &&
4502 stream_idx < s->programs[i]->nb_stream_indexes &&
4503 st->index == s->programs[i]->stream_index[stream_idx];
4506 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4507 if (st->index == s->programs[i]->stream_index[j])
4511 } else if (*spec == '#' ||
4512 (*spec == 'i' && *(spec + 1) == ':')) {
4515 spec += 1 + (*spec == 'i');
4516 stream_id = strtol(spec, &endptr, 0);
4518 return stream_id == st->id;
4519 } else if (!*spec) /* empty specifier, matches everything */
4522 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4523 return AVERROR(EINVAL);
4526 int ff_generate_avci_extradata(AVStream *st)
4528 static const uint8_t avci100_1080p_extradata[] = {
4530 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4531 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4532 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4533 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4534 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4535 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4536 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4537 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4538 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4540 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4543 static const uint8_t avci100_1080i_extradata[] = {
4545 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4546 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4547 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4548 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4549 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4550 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4551 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4552 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4553 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4554 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4555 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
4557 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4560 static const uint8_t avci50_1080i_extradata[] = {
4562 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4563 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4564 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4565 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4566 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4567 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4568 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4569 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4570 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4571 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4572 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4574 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4577 static const uint8_t avci100_720p_extradata[] = {
4579 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4580 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4581 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4582 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4583 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4584 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4585 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4586 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4587 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4588 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4590 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4594 const uint8_t *data = NULL;
4597 if (st->codec->width == 1920) {
4598 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4599 data = avci100_1080p_extradata;
4600 size = sizeof(avci100_1080p_extradata);
4602 data = avci100_1080i_extradata;
4603 size = sizeof(avci100_1080i_extradata);
4605 } else if (st->codec->width == 1440) {
4606 data = avci50_1080i_extradata;
4607 size = sizeof(avci50_1080i_extradata);
4608 } else if (st->codec->width == 1280) {
4609 data = avci100_720p_extradata;
4610 size = sizeof(avci100_720p_extradata);
4616 av_freep(&st->codec->extradata);
4617 if (ff_alloc_extradata(st->codec, size))
4618 return AVERROR(ENOMEM);
4619 memcpy(st->codec->extradata, data, size);