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
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/timestamp.h"
42 #include "audiointerleave.h"
54 * various utility functions for use within FFmpeg
57 unsigned avformat_version(void)
59 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
60 return LIBAVFORMAT_VERSION_INT;
63 const char *avformat_configuration(void)
65 return FFMPEG_CONFIGURATION;
68 const char *avformat_license(void)
70 #define LICENSE_PREFIX "libavformat license: "
71 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
74 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
76 static int is_relative(int64_t ts) {
77 return ts > (RELATIVE_TS_BASE - (1LL<<48));
80 /* fraction handling */
83 * f = val + (num / den) + 0.5.
85 * 'num' is normalized so that it is such as 0 <= num < den.
87 * @param f fractional number
88 * @param val integer value
89 * @param num must be >= 0
90 * @param den must be >= 1
92 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
105 * Fractional addition to f: f = f + (incr / f->den).
107 * @param f fractional number
108 * @param incr increment, can be positive or negative
110 static void frac_add(AVFrac *f, int64_t incr)
123 } else if (num >= den) {
130 /** head of registered input format linked list */
131 static AVInputFormat *first_iformat = NULL;
132 /** head of registered output format linked list */
133 static AVOutputFormat *first_oformat = NULL;
135 AVInputFormat *av_iformat_next(AVInputFormat *f)
137 if(f) return f->next;
138 else return first_iformat;
141 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
143 if(f) return f->next;
144 else return first_oformat;
147 void av_register_input_format(AVInputFormat *format)
151 while (*p != NULL) p = &(*p)->next;
156 void av_register_output_format(AVOutputFormat *format)
160 while (*p != NULL) p = &(*p)->next;
165 int av_match_ext(const char *filename, const char *extensions)
173 ext = strrchr(filename, '.');
179 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
182 if (!av_strcasecmp(ext1, ext))
192 static int match_format(const char *name, const char *names)
200 namelen = strlen(name);
201 while ((p = strchr(names, ','))) {
202 len = FFMAX(p - names, namelen);
203 if (!av_strncasecmp(name, names, len))
207 return !av_strcasecmp(name, names);
210 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
211 const char *mime_type)
213 AVOutputFormat *fmt = NULL, *fmt_found;
214 int score_max, score;
216 /* specific test for image sequences */
217 #if CONFIG_IMAGE2_MUXER
218 if (!short_name && filename &&
219 av_filename_number_test(filename) &&
220 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
221 return av_guess_format("image2", NULL, NULL);
224 /* Find the proper file type. */
227 while ((fmt = av_oformat_next(fmt))) {
229 if (fmt->name && short_name && match_format(short_name, fmt->name))
231 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
233 if (filename && fmt->extensions &&
234 av_match_ext(filename, fmt->extensions)) {
237 if (score > score_max) {
245 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
246 const char *filename, const char *mime_type, enum AVMediaType type){
247 if(type == AVMEDIA_TYPE_VIDEO){
248 enum CodecID codec_id= CODEC_ID_NONE;
250 #if CONFIG_IMAGE2_MUXER
251 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
252 codec_id= ff_guess_image2_codec(filename);
255 if(codec_id == CODEC_ID_NONE)
256 codec_id= fmt->video_codec;
258 }else if(type == AVMEDIA_TYPE_AUDIO)
259 return fmt->audio_codec;
260 else if (type == AVMEDIA_TYPE_SUBTITLE)
261 return fmt->subtitle_codec;
263 return CODEC_ID_NONE;
266 AVInputFormat *av_find_input_format(const char *short_name)
268 AVInputFormat *fmt = NULL;
269 while ((fmt = av_iformat_next(fmt))) {
270 if (match_format(short_name, fmt->name))
276 int ffio_limit(AVIOContext *s, int size)
279 int64_t remaining= s->maxsize - avio_tell(s);
280 if(remaining < size){
281 int64_t newsize= avio_size(s);
282 if(!s->maxsize || s->maxsize<newsize)
283 s->maxsize= newsize - !newsize;
284 remaining= s->maxsize - avio_tell(s);
285 remaining= FFMAX(remaining, 0);
288 if(s->maxsize>=0 && remaining+1 < size){
289 av_log(0, AV_LOG_ERROR, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
296 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
299 int orig_size = size;
300 size= ffio_limit(s, size);
302 ret= av_new_packet(pkt, size);
307 pkt->pos= avio_tell(s);
309 ret= avio_read(s, pkt->data, size);
313 av_shrink_packet(pkt, ret);
314 if (pkt->size < orig_size)
315 pkt->flags |= AV_PKT_FLAG_CORRUPT;
320 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
325 return av_get_packet(s, pkt, size);
326 old_size = pkt->size;
327 ret = av_grow_packet(pkt, size);
330 ret = avio_read(s, pkt->data + old_size, size);
331 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
336 int av_filename_number_test(const char *filename)
339 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
342 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
344 AVProbeData lpd = *pd;
345 AVInputFormat *fmt1 = NULL, *fmt;
346 int score, nodat = 0, score_max=0;
348 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
349 int id3len = ff_id3v2_tag_len(lpd.buf);
350 if (lpd.buf_size > id3len + 16) {
352 lpd.buf_size -= id3len;
358 while ((fmt1 = av_iformat_next(fmt1))) {
359 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
362 if (fmt1->read_probe) {
363 score = fmt1->read_probe(&lpd);
364 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
365 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
366 } else if (fmt1->extensions) {
367 if (av_match_ext(lpd.filename, fmt1->extensions)) {
371 if (score > score_max) {
374 }else if (score == score_max)
377 *score_ret= score_max;
382 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
385 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
386 if(score_ret > *score_max){
387 *score_max= score_ret;
393 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
395 return av_probe_input_format2(pd, is_opened, &score);
398 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
400 static const struct {
401 const char *name; enum CodecID id; enum AVMediaType type;
403 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
404 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
405 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
406 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
407 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
408 { "loas" , CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
409 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
410 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
411 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
415 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
419 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
420 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
421 for (i = 0; fmt_id_type[i].name; i++) {
422 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
423 st->codec->codec_id = fmt_id_type[i].id;
424 st->codec->codec_type = fmt_id_type[i].type;
432 /************************************************************/
433 /* input media file */
435 int av_demuxer_open(AVFormatContext *ic){
438 if (ic->iformat->read_header) {
439 err = ic->iformat->read_header(ic);
444 if (ic->pb && !ic->data_offset)
445 ic->data_offset = avio_tell(ic->pb);
451 /** size of probe buffer, for guessing file type from file contents */
452 #define PROBE_BUF_MIN 2048
453 #define PROBE_BUF_MAX (1<<20)
455 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
456 const char *filename, void *logctx,
457 unsigned int offset, unsigned int max_probe_size)
459 AVProbeData pd = { filename ? filename : "", NULL, -offset };
460 unsigned char *buf = NULL;
461 int ret = 0, probe_size;
463 if (!max_probe_size) {
464 max_probe_size = PROBE_BUF_MAX;
465 } else if (max_probe_size > PROBE_BUF_MAX) {
466 max_probe_size = PROBE_BUF_MAX;
467 } else if (max_probe_size < PROBE_BUF_MIN) {
468 return AVERROR(EINVAL);
471 if (offset >= max_probe_size) {
472 return AVERROR(EINVAL);
475 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
476 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
477 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
478 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
481 if (probe_size < offset) {
485 /* read probe data */
486 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
489 return AVERROR(ENOMEM);
492 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
493 /* fail if error was not end of file, otherwise, lower score */
494 if (ret != AVERROR_EOF) {
499 ret = 0; /* error was end of file, nothing read */
502 pd.buf = &buf[offset];
504 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
506 /* guess file format */
507 *fmt = av_probe_input_format2(&pd, 1, &score);
509 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
510 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
512 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
518 return AVERROR_INVALIDDATA;
521 /* rewind. reuse probe buffer to avoid seeking */
522 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
528 /* open input file and probe the format if necessary */
529 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
532 AVProbeData pd = {filename, NULL, 0};
535 s->flags |= AVFMT_FLAG_CUSTOM_IO;
537 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
538 else if (s->iformat->flags & AVFMT_NOFILE)
539 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
540 "will be ignored with AVFMT_NOFILE format.\n");
544 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
545 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
548 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
549 &s->interrupt_callback, options)) < 0)
553 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
556 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
557 AVPacketList **plast_pktl){
558 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
563 (*plast_pktl)->next = pktl;
565 *packet_buffer = pktl;
567 /* add the packet in the buffered packet list */
573 static void queue_attached_pictures(AVFormatContext *s)
576 for (i = 0; i < s->nb_streams; i++)
577 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
578 s->streams[i]->discard < AVDISCARD_ALL) {
579 AVPacket copy = s->streams[i]->attached_pic;
580 copy.destruct = NULL;
581 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
585 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
587 AVFormatContext *s = *ps;
589 AVDictionary *tmp = NULL;
590 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
592 if (!s && !(s = avformat_alloc_context()))
593 return AVERROR(ENOMEM);
595 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
596 return AVERROR(EINVAL);
602 av_dict_copy(&tmp, *options, 0);
604 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
607 if ((ret = init_input(s, filename, &tmp)) < 0)
610 /* check filename in case an image number is expected */
611 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
612 if (!av_filename_number_test(filename)) {
613 ret = AVERROR(EINVAL);
618 s->duration = s->start_time = AV_NOPTS_VALUE;
619 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
621 /* allocate private data */
622 if (s->iformat->priv_data_size > 0) {
623 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
624 ret = AVERROR(ENOMEM);
627 if (s->iformat->priv_class) {
628 *(const AVClass**)s->priv_data = s->iformat->priv_class;
629 av_opt_set_defaults(s->priv_data);
630 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
635 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
637 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
639 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
640 if ((ret = s->iformat->read_header(s)) < 0)
643 if (id3v2_extra_meta &&
644 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
646 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
648 queue_attached_pictures(s);
650 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
651 s->data_offset = avio_tell(s->pb);
653 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
656 av_dict_free(options);
663 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
665 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
667 avformat_free_context(s);
672 /*******************************************************/
674 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
676 if(st->request_probe>0){
677 AVProbeData *pd = &st->probe_data;
679 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
683 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
684 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
685 pd->buf_size += pkt->size;
686 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
688 st->probe_packets = 0;
691 end= s->raw_packet_buffer_remaining_size <= 0
692 || st->probe_packets<=0;
694 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
695 int score= set_codec_from_probe_data(s, st, pd);
696 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
700 st->request_probe= -1;
701 if(st->codec->codec_id != CODEC_ID_NONE){
702 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
704 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
710 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
716 AVPacketList *pktl = s->raw_packet_buffer;
720 st = s->streams[pkt->stream_index];
721 if(st->request_probe <= 0){
722 s->raw_packet_buffer = pktl->next;
723 s->raw_packet_buffer_remaining_size += pkt->size;
730 ret= s->iformat->read_packet(s, pkt);
732 if (!pktl || ret == AVERROR(EAGAIN))
734 for (i = 0; i < s->nb_streams; i++) {
736 if (st->probe_packets) {
737 probe_codec(s, st, NULL);
739 av_assert0(st->request_probe <= 0);
744 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
745 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
746 av_log(s, AV_LOG_WARNING,
747 "Dropped corrupted packet (stream = %d)\n",
753 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
754 av_packet_merge_side_data(pkt);
756 if(pkt->stream_index >= (unsigned)s->nb_streams){
757 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
761 st= s->streams[pkt->stream_index];
763 switch(st->codec->codec_type){
764 case AVMEDIA_TYPE_VIDEO:
765 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
767 case AVMEDIA_TYPE_AUDIO:
768 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
770 case AVMEDIA_TYPE_SUBTITLE:
771 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
775 if(!pktl && st->request_probe <= 0)
778 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
779 s->raw_packet_buffer_remaining_size -= pkt->size;
781 probe_codec(s, st, pkt);
785 #if FF_API_READ_PACKET
786 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
788 return ff_read_packet(s, pkt);
793 /**********************************************************/
795 static int determinable_frame_size(AVCodecContext *avctx)
797 if (/*avctx->codec_id == CODEC_ID_AAC ||*/
798 avctx->codec_id == CODEC_ID_MP1 ||
799 avctx->codec_id == CODEC_ID_MP2 ||
800 avctx->codec_id == CODEC_ID_MP3/* ||
801 avctx->codec_id == CODEC_ID_CELT*/)
807 * Get the number of samples of an audio frame. Return -1 on error.
809 static int get_audio_frame_size(AVCodecContext *enc, int size, int mux)
813 /* give frame_size priority if demuxing */
814 if (!mux && enc->frame_size > 1)
815 return enc->frame_size;
817 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
820 /* fallback to using frame_size if muxing */
821 if (enc->frame_size > 1)
822 return enc->frame_size;
829 * Return the frame duration in seconds. Return 0 if not available.
831 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
832 AVCodecParserContext *pc, AVPacket *pkt)
838 switch(st->codec->codec_type) {
839 case AVMEDIA_TYPE_VIDEO:
840 if (st->r_frame_rate.num && !pc) {
841 *pnum = st->r_frame_rate.den;
842 *pden = st->r_frame_rate.num;
843 } else if(st->time_base.num*1000LL > st->time_base.den) {
844 *pnum = st->time_base.num;
845 *pden = st->time_base.den;
846 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
847 *pnum = st->codec->time_base.num;
848 *pden = st->codec->time_base.den;
849 if (pc && pc->repeat_pict) {
850 *pnum = (*pnum) * (1 + pc->repeat_pict);
852 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
853 //Thus if we have no parser in such case leave duration undefined.
854 if(st->codec->ticks_per_frame>1 && !pc){
859 case AVMEDIA_TYPE_AUDIO:
860 frame_size = get_audio_frame_size(st->codec, pkt->size, 0);
861 if (frame_size <= 0 || st->codec->sample_rate <= 0)
864 *pden = st->codec->sample_rate;
871 static int is_intra_only(AVCodecContext *enc){
872 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
874 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
875 switch(enc->codec_id){
877 case CODEC_ID_MJPEGB:
879 case CODEC_ID_PRORES:
880 case CODEC_ID_RAWVIDEO:
882 case CODEC_ID_DVVIDEO:
883 case CODEC_ID_HUFFYUV:
884 case CODEC_ID_FFVHUFF:
889 case CODEC_ID_JPEG2000:
891 case CODEC_ID_UTVIDEO:
899 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
903 if (pktl == s->parse_queue_end)
904 return s->packet_buffer;
908 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
909 int64_t dts, int64_t pts)
911 AVStream *st= s->streams[stream_index];
912 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
914 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
917 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
920 if (is_relative(pts))
921 pts += st->first_dts - RELATIVE_TS_BASE;
923 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
924 if(pktl->pkt.stream_index != stream_index)
926 if(is_relative(pktl->pkt.pts))
927 pktl->pkt.pts += st->first_dts - RELATIVE_TS_BASE;
929 if(is_relative(pktl->pkt.dts))
930 pktl->pkt.dts += st->first_dts - RELATIVE_TS_BASE;
932 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
933 st->start_time= pktl->pkt.pts;
935 if (st->start_time == AV_NOPTS_VALUE)
936 st->start_time = pts;
939 static void update_initial_durations(AVFormatContext *s, AVStream *st,
940 int stream_index, int duration)
942 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
943 int64_t cur_dts= RELATIVE_TS_BASE;
945 if(st->first_dts != AV_NOPTS_VALUE){
946 cur_dts= st->first_dts;
947 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
948 if(pktl->pkt.stream_index == stream_index){
949 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
954 if(pktl && pktl->pkt.dts != st->first_dts) {
955 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in que\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
959 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
962 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
963 st->first_dts = cur_dts;
964 }else if(st->cur_dts != RELATIVE_TS_BASE)
967 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
968 if(pktl->pkt.stream_index != stream_index)
970 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
971 && !pktl->pkt.duration){
972 pktl->pkt.dts= cur_dts;
973 if(!st->codec->has_b_frames)
974 pktl->pkt.pts= cur_dts;
975 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
976 pktl->pkt.duration = duration;
979 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
982 st->cur_dts= cur_dts;
985 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
986 AVCodecParserContext *pc, AVPacket *pkt)
988 int num, den, presentation_delayed, delay, i;
991 if (s->flags & AVFMT_FLAG_NOFILLIN)
994 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
995 pkt->dts= AV_NOPTS_VALUE;
997 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
998 //FIXME Set low_delay = 0 when has_b_frames = 1
999 st->codec->has_b_frames = 1;
1001 /* do we have a video B-frame ? */
1002 delay= st->codec->has_b_frames;
1003 presentation_delayed = 0;
1005 /* XXX: need has_b_frame, but cannot get it if the codec is
1008 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1009 presentation_delayed = 1;
1011 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts && st->pts_wrap_bits<63){
1012 pkt->dts -= 1LL<<st->pts_wrap_bits;
1015 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1016 // we take the conservative approach and discard both
1017 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1018 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1019 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1020 pkt->dts= AV_NOPTS_VALUE;
1023 if (pkt->duration == 0) {
1024 compute_frame_duration(&num, &den, st, pc, pkt);
1026 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1029 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1030 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1032 /* correct timestamps with byte offset if demuxers only have timestamps
1033 on packet boundaries */
1034 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1035 /* this will estimate bitrate based on this frame's duration and size */
1036 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1037 if(pkt->pts != AV_NOPTS_VALUE)
1039 if(pkt->dts != AV_NOPTS_VALUE)
1043 if (pc && pc->dts_sync_point >= 0) {
1044 // we have synchronization info from the parser
1045 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1047 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1048 if (pkt->dts != AV_NOPTS_VALUE) {
1049 // got DTS from the stream, update reference timestamp
1050 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1051 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1052 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1053 // compute DTS based on reference timestamp
1054 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1055 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1057 if (pc->dts_sync_point > 0)
1058 st->reference_dts = pkt->dts; // new reference
1062 /* This may be redundant, but it should not hurt. */
1063 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1064 presentation_delayed = 1;
1066 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1067 // presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1068 /* interpolate PTS and DTS if they are not present */
1069 //We skip H264 currently because delay and has_b_frames are not reliably set
1070 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1071 if (presentation_delayed) {
1072 /* DTS = decompression timestamp */
1073 /* PTS = presentation timestamp */
1074 if (pkt->dts == AV_NOPTS_VALUE)
1075 pkt->dts = st->last_IP_pts;
1076 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1077 if (pkt->dts == AV_NOPTS_VALUE)
1078 pkt->dts = st->cur_dts;
1080 /* this is tricky: the dts must be incremented by the duration
1081 of the frame we are displaying, i.e. the last I- or P-frame */
1082 if (st->last_IP_duration == 0)
1083 st->last_IP_duration = pkt->duration;
1084 if(pkt->dts != AV_NOPTS_VALUE)
1085 st->cur_dts = pkt->dts + st->last_IP_duration;
1086 st->last_IP_duration = pkt->duration;
1087 st->last_IP_pts= pkt->pts;
1088 /* cannot compute PTS if not present (we can compute it only
1089 by knowing the future */
1090 } else if (pkt->pts != AV_NOPTS_VALUE ||
1091 pkt->dts != AV_NOPTS_VALUE ||
1093 int duration = pkt->duration;
1095 if(pkt->pts != AV_NOPTS_VALUE && duration){
1096 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1097 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1098 if( old_diff < new_diff && old_diff < (duration>>3)
1099 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1100 && (!strcmp(s->iformat->name, "mpeg") ||
1101 !strcmp(s->iformat->name, "mpegts"))){
1102 pkt->pts += duration;
1103 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1104 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1105 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1109 /* presentation is not delayed : PTS and DTS are the same */
1110 if (pkt->pts == AV_NOPTS_VALUE)
1111 pkt->pts = pkt->dts;
1112 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1114 if (pkt->pts == AV_NOPTS_VALUE)
1115 pkt->pts = st->cur_dts;
1116 pkt->dts = pkt->pts;
1117 if (pkt->pts != AV_NOPTS_VALUE)
1118 st->cur_dts = pkt->pts + duration;
1122 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1123 st->pts_buffer[0]= pkt->pts;
1124 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1125 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1126 if(pkt->dts == AV_NOPTS_VALUE)
1127 pkt->dts= st->pts_buffer[0];
1128 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1129 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1131 if(pkt->dts > st->cur_dts)
1132 st->cur_dts = pkt->dts;
1135 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1136 // presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1139 if(is_intra_only(st->codec))
1140 pkt->flags |= AV_PKT_FLAG_KEY;
1142 pkt->convergence_duration = pc->convergence_duration;
1145 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1148 AVPacketList *pktl = *pkt_buf;
1149 *pkt_buf = pktl->next;
1150 av_free_packet(&pktl->pkt);
1153 *pkt_buf_end = NULL;
1157 * Parse a packet, add all split parts to parse_queue
1159 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1161 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1163 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1164 AVStream *st = s->streams[stream_index];
1165 uint8_t *data = pkt ? pkt->data : NULL;
1166 int size = pkt ? pkt->size : 0;
1167 int ret = 0, got_output = 0;
1170 av_init_packet(&flush_pkt);
1173 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1174 // preserve 0-size sync packets
1175 compute_pkt_fields(s, st, st->parser, pkt);
1178 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1181 av_init_packet(&out_pkt);
1182 len = av_parser_parse2(st->parser, st->codec,
1183 &out_pkt.data, &out_pkt.size, data, size,
1184 pkt->pts, pkt->dts, pkt->pos);
1186 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1187 /* increment read pointer */
1191 got_output = !!out_pkt.size;
1196 /* set the duration */
1197 out_pkt.duration = 0;
1198 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1199 if (st->codec->sample_rate > 0) {
1200 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1201 (AVRational){ 1, st->codec->sample_rate },
1205 } else if (st->codec->time_base.num != 0 &&
1206 st->codec->time_base.den != 0) {
1207 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1208 st->codec->time_base,
1213 out_pkt.stream_index = st->index;
1214 out_pkt.pts = st->parser->pts;
1215 out_pkt.dts = st->parser->dts;
1216 out_pkt.pos = st->parser->pos;
1218 if (st->parser->key_frame == 1 ||
1219 (st->parser->key_frame == -1 &&
1220 st->parser->pict_type == AV_PICTURE_TYPE_I))
1221 out_pkt.flags |= AV_PKT_FLAG_KEY;
1223 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1224 out_pkt.flags |= AV_PKT_FLAG_KEY;
1226 compute_pkt_fields(s, st, st->parser, &out_pkt);
1228 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1229 out_pkt.flags & AV_PKT_FLAG_KEY) {
1230 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? out_pkt.pos : st->parser->frame_offset;
1231 ff_reduce_index(s, st->index);
1232 av_add_index_entry(st, pos, out_pkt.dts,
1233 0, 0, AVINDEX_KEYFRAME);
1236 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1237 out_pkt.destruct = pkt->destruct;
1238 pkt->destruct = NULL;
1240 if ((ret = av_dup_packet(&out_pkt)) < 0)
1243 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1244 av_free_packet(&out_pkt);
1245 ret = AVERROR(ENOMEM);
1251 /* end of the stream => close and free the parser */
1252 if (pkt == &flush_pkt) {
1253 av_parser_close(st->parser);
1258 av_free_packet(pkt);
1262 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1263 AVPacketList **pkt_buffer_end,
1267 av_assert0(*pkt_buffer);
1270 *pkt_buffer = pktl->next;
1272 *pkt_buffer_end = NULL;
1277 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1279 int ret = 0, i, got_packet = 0;
1281 av_init_packet(pkt);
1283 while (!got_packet && !s->parse_queue) {
1287 /* read next packet */
1288 ret = ff_read_packet(s, &cur_pkt);
1290 if (ret == AVERROR(EAGAIN))
1292 /* flush the parsers */
1293 for(i = 0; i < s->nb_streams; i++) {
1295 if (st->parser && st->need_parsing)
1296 parse_packet(s, NULL, st->index);
1298 /* all remaining packets are now in parse_queue =>
1299 * really terminate parsing */
1303 st = s->streams[cur_pkt.stream_index];
1305 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1306 cur_pkt.dts != AV_NOPTS_VALUE &&
1307 cur_pkt.pts < cur_pkt.dts) {
1308 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1309 cur_pkt.stream_index,
1310 av_ts2str(cur_pkt.pts),
1311 av_ts2str(cur_pkt.dts),
1314 if (s->debug & FF_FDEBUG_TS)
1315 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1316 cur_pkt.stream_index,
1317 av_ts2str(cur_pkt.pts),
1318 av_ts2str(cur_pkt.dts),
1323 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1324 st->parser = av_parser_init(st->codec->codec_id);
1326 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1327 "%s, packets or times may be invalid.\n",
1328 avcodec_get_name(st->codec->codec_id));
1329 /* no parser available: just output the raw packets */
1330 st->need_parsing = AVSTREAM_PARSE_NONE;
1331 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1332 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1333 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1334 st->parser->flags |= PARSER_FLAG_ONCE;
1335 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1336 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1340 if (!st->need_parsing || !st->parser) {
1341 /* no parsing needed: we just output the packet as is */
1343 compute_pkt_fields(s, st, NULL, pkt);
1344 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1345 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1346 ff_reduce_index(s, st->index);
1347 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1350 } else if (st->discard < AVDISCARD_ALL) {
1351 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1355 av_free_packet(&cur_pkt);
1357 if (pkt->flags & AV_PKT_FLAG_KEY)
1358 st->skip_to_keyframe = 0;
1359 if (st->skip_to_keyframe) {
1360 av_free_packet(&cur_pkt);
1365 if (!got_packet && s->parse_queue)
1366 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1368 if(s->debug & FF_FDEBUG_TS)
1369 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1371 av_ts2str(pkt->pts),
1372 av_ts2str(pkt->dts),
1380 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1382 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1387 ret = s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1388 &s->packet_buffer_end,
1390 read_frame_internal(s, pkt);
1395 AVPacketList *pktl = s->packet_buffer;
1398 AVPacket *next_pkt = &pktl->pkt;
1400 if (next_pkt->dts != AV_NOPTS_VALUE) {
1401 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1402 // last dts seen for this stream. if any of packets following
1403 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1404 int64_t last_dts = next_pkt->dts;
1405 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1406 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1407 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1408 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1409 next_pkt->pts = pktl->pkt.dts;
1411 if (last_dts != AV_NOPTS_VALUE) {
1412 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1413 last_dts = pktl->pkt.dts;
1418 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1419 // Fixing the last reference frame had none pts issue (For MXF etc).
1420 // We only do this when
1422 // 2. we are not able to resolve a pts value for current packet.
1423 // 3. the packets for this stream at the end of the files had valid dts.
1424 next_pkt->pts = last_dts + next_pkt->duration;
1426 pktl = s->packet_buffer;
1429 /* read packet from packet buffer, if there is data */
1430 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1431 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1432 ret = read_from_packet_buffer(&s->packet_buffer,
1433 &s->packet_buffer_end, pkt);
1438 ret = read_frame_internal(s, pkt);
1440 if (pktl && ret != AVERROR(EAGAIN)) {
1447 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1448 &s->packet_buffer_end)) < 0)
1449 return AVERROR(ENOMEM);
1454 if(s->streams[pkt->stream_index]->skip_samples) {
1455 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1456 AV_WL32(p, s->streams[pkt->stream_index]->skip_samples);
1457 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", s->streams[pkt->stream_index]->skip_samples);
1458 s->streams[pkt->stream_index]->skip_samples = 0;
1461 if (is_relative(pkt->dts))
1462 pkt->dts -= RELATIVE_TS_BASE;
1463 if (is_relative(pkt->pts))
1464 pkt->pts -= RELATIVE_TS_BASE;
1468 /* XXX: suppress the packet queue */
1469 static void flush_packet_queue(AVFormatContext *s)
1471 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1472 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1473 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1475 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1478 /*******************************************************/
1481 int av_find_default_stream_index(AVFormatContext *s)
1483 int first_audio_index = -1;
1487 if (s->nb_streams <= 0)
1489 for(i = 0; i < s->nb_streams; i++) {
1491 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1492 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1495 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1496 first_audio_index = i;
1498 return first_audio_index >= 0 ? first_audio_index : 0;
1502 * Flush the frame reader.
1504 void ff_read_frame_flush(AVFormatContext *s)
1509 flush_packet_queue(s);
1511 /* for each stream, reset read state */
1512 for(i = 0; i < s->nb_streams; i++) {
1516 av_parser_close(st->parser);
1519 st->last_IP_pts = AV_NOPTS_VALUE;
1520 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1521 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1522 st->reference_dts = AV_NOPTS_VALUE;
1524 st->probe_packets = MAX_PROBE_PACKETS;
1526 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1527 st->pts_buffer[j]= AV_NOPTS_VALUE;
1531 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1535 for(i = 0; i < s->nb_streams; i++) {
1536 AVStream *st = s->streams[i];
1538 st->cur_dts = av_rescale(timestamp,
1539 st->time_base.den * (int64_t)ref_st->time_base.num,
1540 st->time_base.num * (int64_t)ref_st->time_base.den);
1544 void ff_reduce_index(AVFormatContext *s, int stream_index)
1546 AVStream *st= s->streams[stream_index];
1547 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1549 if((unsigned)st->nb_index_entries >= max_entries){
1551 for(i=0; 2*i<st->nb_index_entries; i++)
1552 st->index_entries[i]= st->index_entries[2*i];
1553 st->nb_index_entries= i;
1557 int ff_add_index_entry(AVIndexEntry **index_entries,
1558 int *nb_index_entries,
1559 unsigned int *index_entries_allocated_size,
1560 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1562 AVIndexEntry *entries, *ie;
1565 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1568 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1569 timestamp -= RELATIVE_TS_BASE;
1571 entries = av_fast_realloc(*index_entries,
1572 index_entries_allocated_size,
1573 (*nb_index_entries + 1) *
1574 sizeof(AVIndexEntry));
1578 *index_entries= entries;
1580 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1583 index= (*nb_index_entries)++;
1584 ie= &entries[index];
1585 assert(index==0 || ie[-1].timestamp < timestamp);
1587 ie= &entries[index];
1588 if(ie->timestamp != timestamp){
1589 if(ie->timestamp <= timestamp)
1591 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1592 (*nb_index_entries)++;
1593 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1594 distance= ie->min_distance;
1598 ie->timestamp = timestamp;
1599 ie->min_distance= distance;
1606 int av_add_index_entry(AVStream *st,
1607 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1609 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1610 &st->index_entries_allocated_size, pos,
1611 timestamp, size, distance, flags);
1614 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1615 int64_t wanted_timestamp, int flags)
1623 //optimize appending index entries at the end
1624 if(b && entries[b-1].timestamp < wanted_timestamp)
1629 timestamp = entries[m].timestamp;
1630 if(timestamp >= wanted_timestamp)
1632 if(timestamp <= wanted_timestamp)
1635 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1637 if(!(flags & AVSEEK_FLAG_ANY)){
1638 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1639 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1648 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1651 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1652 wanted_timestamp, flags);
1655 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1657 AVInputFormat *avif= s->iformat;
1658 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1659 int64_t ts_min, ts_max, ts;
1664 if (stream_index < 0)
1667 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1670 ts_min= AV_NOPTS_VALUE;
1671 pos_limit= -1; //gcc falsely says it may be uninitialized
1673 st= s->streams[stream_index];
1674 if(st->index_entries){
1677 index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp()
1678 index= FFMAX(index, 0);
1679 e= &st->index_entries[index];
1681 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1683 ts_min= e->timestamp;
1684 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1685 pos_min, av_ts2str(ts_min));
1690 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1691 assert(index < st->nb_index_entries);
1693 e= &st->index_entries[index];
1694 assert(e->timestamp >= target_ts);
1696 ts_max= e->timestamp;
1697 pos_limit= pos_max - e->min_distance;
1698 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1699 pos_max, pos_limit, av_ts2str(ts_max));
1703 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1708 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1711 ff_read_frame_flush(s);
1712 ff_update_cur_dts(s, st, ts);
1717 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1718 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1719 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1720 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1723 int64_t start_pos, filesize;
1726 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1728 if(ts_min == AV_NOPTS_VALUE){
1729 pos_min = s->data_offset;
1730 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1731 if (ts_min == AV_NOPTS_VALUE)
1735 if(ts_min >= target_ts){
1740 if(ts_max == AV_NOPTS_VALUE){
1742 filesize = avio_size(s->pb);
1743 pos_max = filesize - 1;
1746 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1748 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1749 if (ts_max == AV_NOPTS_VALUE)
1753 int64_t tmp_pos= pos_max + 1;
1754 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1755 if(tmp_ts == AV_NOPTS_VALUE)
1759 if(tmp_pos >= filesize)
1765 if(ts_max <= target_ts){
1770 if(ts_min > ts_max){
1772 }else if(ts_min == ts_max){
1777 while (pos_min < pos_limit) {
1778 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1779 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1780 assert(pos_limit <= pos_max);
1783 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1784 // interpolate position (better than dichotomy)
1785 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1786 + pos_min - approximate_keyframe_distance;
1787 }else if(no_change==1){
1788 // bisection, if interpolation failed to change min or max pos last time
1789 pos = (pos_min + pos_limit)>>1;
1791 /* linear search if bisection failed, can only happen if there
1792 are very few or no keyframes between min/max */
1797 else if(pos > pos_limit)
1801 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1806 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1807 pos_min, pos, pos_max,
1808 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1809 pos_limit, start_pos, no_change);
1810 if(ts == AV_NOPTS_VALUE){
1811 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1814 assert(ts != AV_NOPTS_VALUE);
1815 if (target_ts <= ts) {
1816 pos_limit = start_pos - 1;
1820 if (target_ts >= ts) {
1826 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1827 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1830 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1832 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1833 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1834 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1840 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1841 int64_t pos_min, pos_max;
1843 pos_min = s->data_offset;
1844 pos_max = avio_size(s->pb) - 1;
1846 if (pos < pos_min) pos= pos_min;
1847 else if(pos > pos_max) pos= pos_max;
1849 avio_seek(s->pb, pos, SEEK_SET);
1854 static int seek_frame_generic(AVFormatContext *s,
1855 int stream_index, int64_t timestamp, int flags)
1862 st = s->streams[stream_index];
1864 index = av_index_search_timestamp(st, timestamp, flags);
1866 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1869 if(index < 0 || index==st->nb_index_entries-1){
1873 if(st->nb_index_entries){
1874 assert(st->index_entries);
1875 ie= &st->index_entries[st->nb_index_entries-1];
1876 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1878 ff_update_cur_dts(s, st, ie->timestamp);
1880 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1886 read_status = av_read_frame(s, &pkt);
1887 } while (read_status == AVERROR(EAGAIN));
1888 if (read_status < 0)
1890 av_free_packet(&pkt);
1891 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1892 if(pkt.flags & AV_PKT_FLAG_KEY)
1894 if(nonkey++ > 1000 && st->codec->codec_id != CODEC_ID_CDGRAPHICS){
1895 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);
1900 index = av_index_search_timestamp(st, timestamp, flags);
1905 ff_read_frame_flush(s);
1906 AV_NOWARN_DEPRECATED(
1907 if (s->iformat->read_seek){
1908 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1912 ie = &st->index_entries[index];
1913 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1915 ff_update_cur_dts(s, st, ie->timestamp);
1920 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1921 int64_t timestamp, int flags)
1926 if (flags & AVSEEK_FLAG_BYTE) {
1927 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1929 ff_read_frame_flush(s);
1930 return seek_frame_byte(s, stream_index, timestamp, flags);
1933 if(stream_index < 0){
1934 stream_index= av_find_default_stream_index(s);
1935 if(stream_index < 0)
1938 st= s->streams[stream_index];
1939 /* timestamp for default must be expressed in AV_TIME_BASE units */
1940 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1943 /* first, we try the format specific seek */
1944 AV_NOWARN_DEPRECATED(
1945 if (s->iformat->read_seek) {
1946 ff_read_frame_flush(s);
1947 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1955 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1956 ff_read_frame_flush(s);
1957 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1958 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1959 ff_read_frame_flush(s);
1960 return seek_frame_generic(s, stream_index, timestamp, flags);
1966 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1968 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1971 queue_attached_pictures(s);
1976 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1978 if(min_ts > ts || max_ts < ts)
1981 if (s->iformat->read_seek2) {
1983 ff_read_frame_flush(s);
1984 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1987 queue_attached_pictures(s);
1991 if(s->iformat->read_timestamp){
1992 //try to seek via read_timestamp()
1995 //Fallback to old API if new is not implemented but old is
1996 //Note the old has somewat different sematics
1997 AV_NOWARN_DEPRECATED(
1998 if (s->iformat->read_seek || 1) {
1999 int dir = (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0);
2000 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2001 if (ret<0 && ts != min_ts && max_ts != ts) {
2002 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2004 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2010 // try some generic seek like seek_frame_generic() but with new ts semantics
2013 /*******************************************************/
2016 * Return TRUE if the stream has accurate duration in any stream.
2018 * @return TRUE if the stream has accurate duration for at least one component.
2020 static int has_duration(AVFormatContext *ic)
2025 for(i = 0;i < ic->nb_streams; i++) {
2026 st = ic->streams[i];
2027 if (st->duration != AV_NOPTS_VALUE)
2030 if (ic->duration != AV_NOPTS_VALUE)
2036 * Estimate the stream timings from the one of each components.
2038 * Also computes the global bitrate if possible.
2040 static void update_stream_timings(AVFormatContext *ic)
2042 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2043 int64_t duration, duration1, filesize;
2047 start_time = INT64_MAX;
2048 start_time_text = INT64_MAX;
2049 end_time = INT64_MIN;
2050 duration = INT64_MIN;
2051 for(i = 0;i < ic->nb_streams; i++) {
2052 st = ic->streams[i];
2053 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2054 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2055 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2056 if (start_time1 < start_time_text)
2057 start_time_text = start_time1;
2059 start_time = FFMIN(start_time, start_time1);
2060 if (st->duration != AV_NOPTS_VALUE) {
2061 end_time1 = start_time1
2062 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2063 end_time = FFMAX(end_time, end_time1);
2066 if (st->duration != AV_NOPTS_VALUE) {
2067 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2068 duration = FFMAX(duration, duration1);
2071 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2072 start_time = start_time_text;
2073 else if(start_time > start_time_text)
2074 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2076 if (start_time != INT64_MAX) {
2077 ic->start_time = start_time;
2078 if (end_time != INT64_MIN)
2079 duration = FFMAX(duration, end_time - start_time);
2081 if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
2082 ic->duration = duration;
2084 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2085 /* compute the bitrate */
2086 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2087 (double)ic->duration;
2091 static void fill_all_stream_timings(AVFormatContext *ic)
2096 update_stream_timings(ic);
2097 for(i = 0;i < ic->nb_streams; i++) {
2098 st = ic->streams[i];
2099 if (st->start_time == AV_NOPTS_VALUE) {
2100 if(ic->start_time != AV_NOPTS_VALUE)
2101 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2102 if(ic->duration != AV_NOPTS_VALUE)
2103 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2108 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2110 int64_t filesize, duration;
2114 /* if bit_rate is already set, we believe it */
2115 if (ic->bit_rate <= 0) {
2117 for(i=0;i<ic->nb_streams;i++) {
2118 st = ic->streams[i];
2119 if (st->codec->bit_rate > 0)
2120 bit_rate += st->codec->bit_rate;
2122 ic->bit_rate = bit_rate;
2125 /* if duration is already set, we believe it */
2126 if (ic->duration == AV_NOPTS_VALUE &&
2127 ic->bit_rate != 0) {
2128 filesize = ic->pb ? avio_size(ic->pb) : 0;
2130 for(i = 0; i < ic->nb_streams; i++) {
2131 st = ic->streams[i];
2132 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2133 if (st->duration == AV_NOPTS_VALUE)
2134 st->duration = duration;
2140 #define DURATION_MAX_READ_SIZE 250000
2141 #define DURATION_MAX_RETRY 3
2143 /* only usable for MPEG-PS streams */
2144 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2146 AVPacket pkt1, *pkt = &pkt1;
2148 int read_size, i, ret;
2150 int64_t filesize, offset, duration;
2153 /* flush packet queue */
2154 flush_packet_queue(ic);
2156 for (i=0; i<ic->nb_streams; i++) {
2157 st = ic->streams[i];
2158 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2159 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2162 av_parser_close(st->parser);
2167 /* estimate the end time (duration) */
2168 /* XXX: may need to support wrapping */
2169 filesize = ic->pb ? avio_size(ic->pb) : 0;
2170 end_time = AV_NOPTS_VALUE;
2172 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2176 avio_seek(ic->pb, offset, SEEK_SET);
2179 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2183 ret = ff_read_packet(ic, pkt);
2184 } while(ret == AVERROR(EAGAIN));
2187 read_size += pkt->size;
2188 st = ic->streams[pkt->stream_index];
2189 if (pkt->pts != AV_NOPTS_VALUE &&
2190 (st->start_time != AV_NOPTS_VALUE ||
2191 st->first_dts != AV_NOPTS_VALUE)) {
2192 duration = end_time = pkt->pts;
2193 if (st->start_time != AV_NOPTS_VALUE)
2194 duration -= st->start_time;
2196 duration -= st->first_dts;
2198 duration += 1LL<<st->pts_wrap_bits;
2200 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2201 st->duration = duration;
2204 av_free_packet(pkt);
2206 }while( end_time==AV_NOPTS_VALUE
2207 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2208 && ++retry <= DURATION_MAX_RETRY);
2210 fill_all_stream_timings(ic);
2212 avio_seek(ic->pb, old_offset, SEEK_SET);
2213 for (i=0; i<ic->nb_streams; i++) {
2215 st->cur_dts= st->first_dts;
2216 st->last_IP_pts = AV_NOPTS_VALUE;
2217 st->reference_dts = AV_NOPTS_VALUE;
2221 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2225 /* get the file size, if possible */
2226 if (ic->iformat->flags & AVFMT_NOFILE) {
2229 file_size = avio_size(ic->pb);
2230 file_size = FFMAX(0, file_size);
2233 if ((!strcmp(ic->iformat->name, "mpeg") ||
2234 !strcmp(ic->iformat->name, "mpegts")) &&
2235 file_size && ic->pb->seekable) {
2236 /* get accurate estimate from the PTSes */
2237 estimate_timings_from_pts(ic, old_offset);
2238 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2239 } else if (has_duration(ic)) {
2240 /* at least one component has timings - we use them for all
2242 fill_all_stream_timings(ic);
2243 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2245 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2246 /* less precise: use bitrate info */
2247 estimate_timings_from_bit_rate(ic);
2248 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2250 update_stream_timings(ic);
2254 AVStream av_unused *st;
2255 for(i = 0;i < ic->nb_streams; i++) {
2256 st = ic->streams[i];
2257 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2258 (double) st->start_time / AV_TIME_BASE,
2259 (double) st->duration / AV_TIME_BASE);
2261 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2262 (double) ic->start_time / AV_TIME_BASE,
2263 (double) ic->duration / AV_TIME_BASE,
2264 ic->bit_rate / 1000);
2268 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2270 AVCodecContext *avctx = st->codec;
2272 #define FAIL(errmsg) do { \
2274 *errmsg_ptr = errmsg; \
2278 switch (avctx->codec_type) {
2279 case AVMEDIA_TYPE_AUDIO:
2280 if (!avctx->frame_size && determinable_frame_size(avctx))
2281 FAIL("unspecified sample size");
2282 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2283 FAIL("unspecified sample format");
2284 if (!avctx->sample_rate)
2285 FAIL("unspecified sample rate");
2286 if (!avctx->channels)
2287 FAIL("unspecified number of channels");
2289 case AVMEDIA_TYPE_VIDEO:
2291 FAIL("unspecified size");
2292 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2293 FAIL("unspecified pixel format");
2295 case AVMEDIA_TYPE_DATA:
2296 if(avctx->codec_id == CODEC_ID_NONE) return 1;
2299 if (avctx->codec_id == CODEC_ID_NONE)
2300 FAIL("unknown codec");
2304 static int has_decode_delay_been_guessed(AVStream *st)
2306 if(st->codec->codec_id != CODEC_ID_H264) return 1;
2307 #if CONFIG_H264_DECODER
2308 if(st->codec->has_b_frames &&
2309 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
2312 if(st->codec->has_b_frames<3)
2313 return st->info->nb_decoded_frames >= 6;
2314 else if(st->codec->has_b_frames<4)
2315 return st->info->nb_decoded_frames >= 18;
2317 return st->info->nb_decoded_frames >= 20;
2320 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2321 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2324 int got_picture = 1, ret = 0;
2326 AVPacket pkt = *avpkt;
2328 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2329 AVDictionary *thread_opt = NULL;
2331 codec = st->codec->codec ? st->codec->codec :
2332 avcodec_find_decoder(st->codec->codec_id);
2335 st->info->found_decoder = -1;
2339 /* force thread count to 1 since the h264 decoder will not extract SPS
2340 * and PPS to extradata during multi-threaded decoding */
2341 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2342 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2344 av_dict_free(&thread_opt);
2346 st->info->found_decoder = -1;
2349 st->info->found_decoder = 1;
2350 } else if (!st->info->found_decoder)
2351 st->info->found_decoder = 1;
2353 if (st->info->found_decoder < 0)
2356 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2358 (!has_codec_parameters(st, NULL) ||
2359 !has_decode_delay_been_guessed(st) ||
2360 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2362 avcodec_get_frame_defaults(&picture);
2363 switch(st->codec->codec_type) {
2364 case AVMEDIA_TYPE_VIDEO:
2365 ret = avcodec_decode_video2(st->codec, &picture,
2366 &got_picture, &pkt);
2368 case AVMEDIA_TYPE_AUDIO:
2369 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2376 st->info->nb_decoded_frames++;
2382 if(!pkt.data && !got_picture)
2387 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2389 while (tags->id != CODEC_ID_NONE) {
2397 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2400 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2401 if(tag == tags[i].tag)
2404 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2405 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2408 return CODEC_ID_NONE;
2411 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2414 for(i=0; tags && tags[i]; i++){
2415 int tag= ff_codec_get_tag(tags[i], id);
2421 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2424 for(i=0; tags && tags[i]; i++){
2425 enum CodecID id= ff_codec_get_id(tags[i], tag);
2426 if(id!=CODEC_ID_NONE) return id;
2428 return CODEC_ID_NONE;
2431 static void compute_chapters_end(AVFormatContext *s)
2434 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2436 for (i = 0; i < s->nb_chapters; i++)
2437 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2438 AVChapter *ch = s->chapters[i];
2439 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2442 for (j = 0; j < s->nb_chapters; j++) {
2443 AVChapter *ch1 = s->chapters[j];
2444 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2445 if (j != i && next_start > ch->start && next_start < end)
2448 ch->end = (end == INT64_MAX) ? ch->start : end;
2452 static int get_std_framerate(int i){
2453 if(i<60*12) return (i+1)*1001;
2454 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2458 * Is the time base unreliable.
2459 * This is a heuristic to balance between quick acceptance of the values in
2460 * the headers vs. some extra checks.
2461 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2462 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2463 * And there are "variable" fps files this needs to detect as well.
2465 static int tb_unreliable(AVCodecContext *c){
2466 if( c->time_base.den >= 101L*c->time_base.num
2467 || c->time_base.den < 5L*c->time_base.num
2468 /* || c->codec_tag == AV_RL32("DIVX")
2469 || c->codec_tag == AV_RL32("XVID")*/
2470 || c->codec_id == CODEC_ID_MPEG2VIDEO
2471 || c->codec_id == CODEC_ID_H264
2477 #if FF_API_FORMAT_PARAMETERS
2478 int av_find_stream_info(AVFormatContext *ic)
2480 return avformat_find_stream_info(ic, NULL);
2484 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2486 int i, count, ret, read_size, j;
2488 AVPacket pkt1, *pkt;
2489 int64_t old_offset = avio_tell(ic->pb);
2490 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2491 int flush_codecs = 1;
2494 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2496 for(i=0;i<ic->nb_streams;i++) {
2498 AVDictionary *thread_opt = NULL;
2499 st = ic->streams[i];
2501 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2502 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2503 /* if(!st->time_base.num)
2505 if(!st->codec->time_base.num)
2506 st->codec->time_base= st->time_base;
2508 //only for the split stuff
2509 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2510 st->parser = av_parser_init(st->codec->codec_id);
2512 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2513 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2514 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2515 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2517 } else if (st->need_parsing) {
2518 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2519 "%s, packets or times may be invalid.\n",
2520 avcodec_get_name(st->codec->codec_id));
2523 codec = st->codec->codec ? st->codec->codec :
2524 avcodec_find_decoder(st->codec->codec_id);
2526 /* force thread count to 1 since the h264 decoder will not extract SPS
2527 * and PPS to extradata during multi-threaded decoding */
2528 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2530 /* Ensure that subtitle_header is properly set. */
2531 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2532 && codec && !st->codec->codec)
2533 avcodec_open2(st->codec, codec, options ? &options[i]
2536 //try to just open decoders, in case this is enough to get parameters
2537 if (!has_codec_parameters(st, NULL)) {
2538 if (codec && !st->codec->codec)
2539 avcodec_open2(st->codec, codec, options ? &options[i]
2543 av_dict_free(&thread_opt);
2546 for (i=0; i<ic->nb_streams; i++) {
2547 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2553 if (ff_check_interrupt(&ic->interrupt_callback)){
2555 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2559 /* check if one codec still needs to be handled */
2560 for(i=0;i<ic->nb_streams;i++) {
2561 int fps_analyze_framecount = 20;
2563 st = ic->streams[i];
2564 if (!has_codec_parameters(st, NULL))
2566 /* if the timebase is coarse (like the usual millisecond precision
2567 of mkv), we need to analyze more frames to reliably arrive at
2569 if (av_q2d(st->time_base) > 0.0005)
2570 fps_analyze_framecount *= 2;
2571 if (ic->fps_probe_size >= 0)
2572 fps_analyze_framecount = ic->fps_probe_size;
2573 /* variable fps and no guess at the real fps */
2574 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2575 && st->info->duration_count < fps_analyze_framecount
2576 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2578 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2580 if (st->first_dts == AV_NOPTS_VALUE &&
2581 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2582 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2585 if (i == ic->nb_streams) {
2586 /* NOTE: if the format has no header, then we need to read
2587 some packets to get most of the streams, so we cannot
2589 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2590 /* if we found the info for all the codecs, we can stop */
2592 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2597 /* we did not get all the codec info, but we read too much data */
2598 if (read_size >= ic->probesize) {
2600 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2601 for (i = 0; i < ic->nb_streams; i++)
2602 if (!ic->streams[i]->r_frame_rate.num &&
2603 ic->streams[i]->info->duration_count <= 1)
2604 av_log(ic, AV_LOG_WARNING,
2605 "Stream #%d: not enough frames to estimate rate; "
2606 "consider increasing probesize\n", i);
2610 /* NOTE: a new stream can be added there if no header in file
2611 (AVFMTCTX_NOHEADER) */
2612 ret = read_frame_internal(ic, &pkt1);
2613 if (ret == AVERROR(EAGAIN))
2621 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2622 if ((ret = av_dup_packet(pkt)) < 0)
2623 goto find_stream_info_err;
2625 read_size += pkt->size;
2627 st = ic->streams[pkt->stream_index];
2628 if (st->codec_info_nb_frames>1) {
2630 if (st->time_base.den > 0)
2631 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2632 if (st->avg_frame_rate.num > 0)
2633 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num}, AV_TIME_BASE_Q));
2635 if (t >= ic->max_analyze_duration) {
2636 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2639 st->info->codec_info_duration += pkt->duration;
2642 int64_t last = st->info->last_dts;
2644 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2645 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2646 int64_t duration= pkt->dts - last;
2648 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2649 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2650 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2651 int framerate= get_std_framerate(i);
2652 double sdts= dts*framerate/(1001*12);
2654 int ticks= lrintf(sdts+j*0.5);
2655 double error= sdts - ticks + j*0.5;
2656 st->info->duration_error[j][0][i] += error;
2657 st->info->duration_error[j][1][i] += error*error;
2660 st->info->duration_count++;
2661 // ignore the first 4 values, they might have some random jitter
2662 if (st->info->duration_count > 3)
2663 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2665 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2666 st->info->last_dts = pkt->dts;
2668 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2669 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2670 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2671 st->codec->extradata_size= i;
2672 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2673 if (!st->codec->extradata)
2674 return AVERROR(ENOMEM);
2675 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2676 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2680 /* if still no information, we try to open the codec and to
2681 decompress the frame. We try to avoid that in most cases as
2682 it takes longer and uses more memory. For MPEG-4, we need to
2683 decompress for QuickTime.
2685 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2686 least one frame of codec data, this makes sure the codec initializes
2687 the channel configuration and does not only trust the values from the container.
2689 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2691 st->codec_info_nb_frames++;
2696 AVPacket empty_pkt = { 0 };
2698 av_init_packet(&empty_pkt);
2700 ret = -1; /* we could not have all the codec parameters before EOF */
2701 for(i=0;i<ic->nb_streams;i++) {
2704 st = ic->streams[i];
2706 /* flush the decoders */
2707 if (st->info->found_decoder == 1) {
2709 err = try_decode_frame(st, &empty_pkt,
2710 (options && i < orig_nb_streams) ?
2711 &options[i] : NULL);
2712 } while (err > 0 && !has_codec_parameters(st, NULL));
2715 av_log(ic, AV_LOG_INFO,
2716 "decoding for stream %d failed\n", st->index);
2720 if (!has_codec_parameters(st, &errmsg)) {
2722 avcodec_string(buf, sizeof(buf), st->codec, 0);
2723 av_log(ic, AV_LOG_WARNING,
2724 "Could not find codec parameters for stream (%s): %s\n"
2725 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2733 // close codecs which were opened in try_decode_frame()
2734 for(i=0;i<ic->nb_streams;i++) {
2735 st = ic->streams[i];
2736 avcodec_close(st->codec);
2738 for(i=0;i<ic->nb_streams;i++) {
2739 st = ic->streams[i];
2740 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2741 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2742 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2743 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2744 st->codec->codec_tag= tag;
2747 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2748 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2749 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2750 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2751 // the check for tb_unreliable() is not completely correct, since this is not about handling
2752 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2753 // ipmovie.c produces.
2754 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)
2755 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);
2756 if (st->info->duration_count && !st->r_frame_rate.num
2757 && tb_unreliable(st->codec) /*&&
2758 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2759 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2761 double best_error= 0.01;
2763 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2766 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2768 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2771 int n= st->info->duration_count;
2772 double a= st->info->duration_error[k][0][j] / n;
2773 double error= st->info->duration_error[k][1][j]/n - a*a;
2775 if(error < best_error && best_error> 0.000000001){
2777 num = get_std_framerate(j);
2780 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2783 // do not increase frame rate by more than 1 % in order to match a standard rate.
2784 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2785 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2788 if (!st->r_frame_rate.num){
2789 if( st->codec->time_base.den * (int64_t)st->time_base.num
2790 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2791 st->r_frame_rate.num = st->codec->time_base.den;
2792 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2794 st->r_frame_rate.num = st->time_base.den;
2795 st->r_frame_rate.den = st->time_base.num;
2798 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2799 if(!st->codec->bits_per_coded_sample)
2800 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2801 // set stream disposition based on audio service type
2802 switch (st->codec->audio_service_type) {
2803 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2804 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2805 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2806 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2807 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2808 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2809 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2810 st->disposition = AV_DISPOSITION_COMMENT; break;
2811 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2812 st->disposition = AV_DISPOSITION_KARAOKE; break;
2817 estimate_timings(ic, old_offset);
2819 compute_chapters_end(ic);
2821 find_stream_info_err:
2822 for (i=0; i < ic->nb_streams; i++) {
2823 if (ic->streams[i]->codec)
2824 ic->streams[i]->codec->thread_count = 0;
2825 av_freep(&ic->streams[i]->info);
2828 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2832 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2836 for (i = 0; i < ic->nb_programs; i++) {
2837 if (ic->programs[i] == last) {
2841 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2842 if (ic->programs[i]->stream_index[j] == s)
2843 return ic->programs[i];
2849 int av_find_best_stream(AVFormatContext *ic,
2850 enum AVMediaType type,
2851 int wanted_stream_nb,
2853 AVCodec **decoder_ret,
2856 int i, nb_streams = ic->nb_streams;
2857 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2858 unsigned *program = NULL;
2859 AVCodec *decoder = NULL, *best_decoder = NULL;
2861 if (related_stream >= 0 && wanted_stream_nb < 0) {
2862 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2864 program = p->stream_index;
2865 nb_streams = p->nb_stream_indexes;
2868 for (i = 0; i < nb_streams; i++) {
2869 int real_stream_index = program ? program[i] : i;
2870 AVStream *st = ic->streams[real_stream_index];
2871 AVCodecContext *avctx = st->codec;
2872 if (avctx->codec_type != type)
2874 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2876 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2879 decoder = avcodec_find_decoder(st->codec->codec_id);
2882 ret = AVERROR_DECODER_NOT_FOUND;
2886 if (best_count >= st->codec_info_nb_frames)
2888 best_count = st->codec_info_nb_frames;
2889 ret = real_stream_index;
2890 best_decoder = decoder;
2891 if (program && i == nb_streams - 1 && ret < 0) {
2893 nb_streams = ic->nb_streams;
2894 i = 0; /* no related stream found, try again with everything */
2898 *decoder_ret = best_decoder;
2902 /*******************************************************/
2904 int av_read_play(AVFormatContext *s)
2906 if (s->iformat->read_play)
2907 return s->iformat->read_play(s);
2909 return avio_pause(s->pb, 0);
2910 return AVERROR(ENOSYS);
2913 int av_read_pause(AVFormatContext *s)
2915 if (s->iformat->read_pause)
2916 return s->iformat->read_pause(s);
2918 return avio_pause(s->pb, 1);
2919 return AVERROR(ENOSYS);
2922 void avformat_free_context(AVFormatContext *s)
2928 if (s->iformat && s->iformat->priv_class && s->priv_data)
2929 av_opt_free(s->priv_data);
2931 for(i=0;i<s->nb_streams;i++) {
2932 /* free all data in a stream component */
2935 av_parser_close(st->parser);
2937 if (st->attached_pic.data)
2938 av_free_packet(&st->attached_pic);
2939 av_dict_free(&st->metadata);
2940 av_freep(&st->index_entries);
2941 av_freep(&st->codec->extradata);
2942 av_freep(&st->codec->subtitle_header);
2943 av_freep(&st->codec);
2944 av_freep(&st->priv_data);
2945 av_freep(&st->info);
2948 for(i=s->nb_programs-1; i>=0; i--) {
2949 av_dict_free(&s->programs[i]->metadata);
2950 av_freep(&s->programs[i]->stream_index);
2951 av_freep(&s->programs[i]);
2953 av_freep(&s->programs);
2954 av_freep(&s->priv_data);
2955 while(s->nb_chapters--) {
2956 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2957 av_freep(&s->chapters[s->nb_chapters]);
2959 av_freep(&s->chapters);
2960 av_dict_free(&s->metadata);
2961 av_freep(&s->streams);
2965 #if FF_API_CLOSE_INPUT_FILE
2966 void av_close_input_file(AVFormatContext *s)
2968 avformat_close_input(&s);
2972 void avformat_close_input(AVFormatContext **ps)
2974 AVFormatContext *s = *ps;
2975 AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2977 flush_packet_queue(s);
2978 if (s->iformat && (s->iformat->read_close))
2979 s->iformat->read_close(s);
2980 avformat_free_context(s);
2986 #if FF_API_NEW_STREAM
2987 AVStream *av_new_stream(AVFormatContext *s, int id)
2989 AVStream *st = avformat_new_stream(s, NULL);
2996 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
3002 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3004 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3007 s->streams = streams;
3009 st = av_mallocz(sizeof(AVStream));
3012 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3016 st->info->last_dts = AV_NOPTS_VALUE;
3018 st->codec = avcodec_alloc_context3(c);
3020 /* no default bitrate if decoding */
3021 st->codec->bit_rate = 0;
3023 st->index = s->nb_streams;
3024 st->start_time = AV_NOPTS_VALUE;
3025 st->duration = AV_NOPTS_VALUE;
3026 /* we set the current DTS to 0 so that formats without any timestamps
3027 but durations get some timestamps, formats with some unknown
3028 timestamps have their first few packets buffered and the
3029 timestamps corrected before they are returned to the user */
3030 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3031 st->first_dts = AV_NOPTS_VALUE;
3032 st->probe_packets = MAX_PROBE_PACKETS;
3034 /* default pts setting is MPEG-like */
3035 avpriv_set_pts_info(st, 33, 1, 90000);
3036 st->last_IP_pts = AV_NOPTS_VALUE;
3037 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3038 st->pts_buffer[i]= AV_NOPTS_VALUE;
3039 st->reference_dts = AV_NOPTS_VALUE;
3041 st->sample_aspect_ratio = (AVRational){0,1};
3043 s->streams[s->nb_streams++] = st;
3047 AVProgram *av_new_program(AVFormatContext *ac, int id)
3049 AVProgram *program=NULL;
3052 av_dlog(ac, "new_program: id=0x%04x\n", id);
3054 for(i=0; i<ac->nb_programs; i++)
3055 if(ac->programs[i]->id == id)
3056 program = ac->programs[i];
3059 program = av_mallocz(sizeof(AVProgram));
3062 dynarray_add(&ac->programs, &ac->nb_programs, program);
3063 program->discard = AVDISCARD_NONE;
3070 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3072 AVChapter *chapter = NULL;
3075 for(i=0; i<s->nb_chapters; i++)
3076 if(s->chapters[i]->id == id)
3077 chapter = s->chapters[i];
3080 chapter= av_mallocz(sizeof(AVChapter));
3083 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3085 av_dict_set(&chapter->metadata, "title", title, 0);
3087 chapter->time_base= time_base;
3088 chapter->start = start;
3094 /************************************************************/
3095 /* output media file */
3097 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
3098 const char *format, const char *filename)
3100 AVFormatContext *s = avformat_alloc_context();
3109 oformat = av_guess_format(format, NULL, NULL);
3111 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
3112 ret = AVERROR(EINVAL);
3116 oformat = av_guess_format(NULL, filename, NULL);
3118 ret = AVERROR(EINVAL);
3119 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
3126 s->oformat = oformat;
3127 if (s->oformat->priv_data_size > 0) {
3128 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3131 if (s->oformat->priv_class) {
3132 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3133 av_opt_set_defaults(s->priv_data);
3136 s->priv_data = NULL;
3139 av_strlcpy(s->filename, filename, sizeof(s->filename));
3143 av_log(s, AV_LOG_ERROR, "Out of memory\n");
3144 ret = AVERROR(ENOMEM);
3146 avformat_free_context(s);
3150 #if FF_API_ALLOC_OUTPUT_CONTEXT
3151 AVFormatContext *avformat_alloc_output_context(const char *format,
3152 AVOutputFormat *oformat, const char *filename)
3154 AVFormatContext *avctx;
3155 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
3156 return ret < 0 ? NULL : avctx;
3160 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
3162 const AVCodecTag *avctag;
3164 enum CodecID id = CODEC_ID_NONE;
3165 unsigned int tag = 0;
3168 * Check that tag + id is in the table
3169 * If neither is in the table -> OK
3170 * If tag is in the table with another id -> FAIL
3171 * If id is in the table with another tag -> FAIL unless strict < normal
3173 for (n = 0; s->oformat->codec_tag[n]; n++) {
3174 avctag = s->oformat->codec_tag[n];
3175 while (avctag->id != CODEC_ID_NONE) {
3176 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
3178 if (id == st->codec->codec_id)
3181 if (avctag->id == st->codec->codec_id)
3186 if (id != CODEC_ID_NONE)
3188 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
3193 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
3197 AVDictionary *tmp = NULL;
3200 av_dict_copy(&tmp, *options, 0);
3201 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
3203 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
3204 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3207 // some sanity checks
3208 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
3209 av_log(s, AV_LOG_ERROR, "no streams\n");
3210 ret = AVERROR(EINVAL);
3214 for(i=0;i<s->nb_streams;i++) {
3217 switch (st->codec->codec_type) {
3218 case AVMEDIA_TYPE_AUDIO:
3219 if(st->codec->sample_rate<=0){
3220 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
3221 ret = AVERROR(EINVAL);
3224 if(!st->codec->block_align)
3225 st->codec->block_align = st->codec->channels *
3226 av_get_bits_per_sample(st->codec->codec_id) >> 3;
3228 case AVMEDIA_TYPE_VIDEO:
3229 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
3230 av_log(s, AV_LOG_ERROR, "time base not set\n");
3231 ret = AVERROR(EINVAL);
3234 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
3235 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
3236 ret = AVERROR(EINVAL);
3239 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
3240 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
3242 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
3243 "(%d/%d) and encoder layer (%d/%d)\n",
3244 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3245 st->codec->sample_aspect_ratio.num,
3246 st->codec->sample_aspect_ratio.den);
3247 ret = AVERROR(EINVAL);
3253 if(s->oformat->codec_tag){
3254 if( st->codec->codec_tag
3255 && st->codec->codec_id == CODEC_ID_RAWVIDEO
3256 && (av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 || av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) ==MKTAG('r', 'a', 'w', ' '))
3257 && !validate_codec_tag(s, st)){
3258 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi/mov, we override it here
3259 st->codec->codec_tag= 0;
3261 if(st->codec->codec_tag){
3262 if (!validate_codec_tag(s, st)) {
3263 char tagbuf[32], cortag[32];
3264 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3265 av_get_codec_tag_string(cortag, sizeof(cortag), av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id));
3266 av_log(s, AV_LOG_ERROR,
3267 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
3268 tagbuf, st->codec->codec_tag, st->codec->codec_id, cortag);
3269 ret = AVERROR_INVALIDDATA;
3273 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3276 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3277 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3278 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3281 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3282 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3283 if (!s->priv_data) {
3284 ret = AVERROR(ENOMEM);
3287 if (s->oformat->priv_class) {
3288 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3289 av_opt_set_defaults(s->priv_data);
3290 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3295 /* set muxer identification string */
3296 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3297 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3300 if(s->oformat->write_header){
3301 ret = s->oformat->write_header(s);
3306 /* init PTS generation */
3307 for(i=0;i<s->nb_streams;i++) {
3308 int64_t den = AV_NOPTS_VALUE;
3311 switch (st->codec->codec_type) {
3312 case AVMEDIA_TYPE_AUDIO:
3313 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3315 case AVMEDIA_TYPE_VIDEO:
3316 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3321 if (den != AV_NOPTS_VALUE) {
3323 ret = AVERROR_INVALIDDATA;
3326 frac_init(&st->pts, 0, 0, den);
3331 av_dict_free(options);
3340 //FIXME merge with compute_pkt_fields
3341 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3342 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3343 int num, den, frame_size, i;
3345 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
3346 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
3348 /* duration field */
3349 if (pkt->duration == 0) {
3350 compute_frame_duration(&num, &den, st, NULL, pkt);
3352 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3356 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3359 //XXX/FIXME this is a temporary hack until all encoders output pts
3360 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3363 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
3367 // pkt->pts= st->cur_dts;
3368 pkt->pts= st->pts.val;
3371 //calculate dts from pts
3372 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3373 st->pts_buffer[0]= pkt->pts;
3374 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3375 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3376 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3377 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3379 pkt->dts= st->pts_buffer[0];
3382 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
3383 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
3384 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
3385 av_log(s, AV_LOG_ERROR,
3386 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
3387 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
3388 return AVERROR(EINVAL);
3390 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3391 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
3392 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
3393 return AVERROR(EINVAL);
3396 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n", av_ts2str(pkt->pts), av_ts2str(pkt->dts));
3397 st->cur_dts= pkt->dts;
3398 st->pts.val= pkt->dts;
3401 switch (st->codec->codec_type) {
3402 case AVMEDIA_TYPE_AUDIO:
3403 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
3405 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3406 likely equal to the encoder delay, but it would be better if we
3407 had the real timestamps from the encoder */
3408 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3409 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3412 case AVMEDIA_TYPE_VIDEO:
3413 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3421 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3426 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3427 return s->oformat->write_packet(s, pkt);
3431 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3433 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3436 ret= s->oformat->write_packet(s, pkt);
3439 s->streams[pkt->stream_index]->nb_frames++;
3443 #define CHUNK_START 0x1000
3445 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3446 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3448 AVPacketList **next_point, *this_pktl;
3449 AVStream *st= s->streams[pkt->stream_index];
3450 int chunked= s->max_chunk_size || s->max_chunk_duration;
3452 this_pktl = av_mallocz(sizeof(AVPacketList));
3454 return AVERROR(ENOMEM);
3455 this_pktl->pkt= *pkt;
3456 pkt->destruct= NULL; // do not free original but only the copy
3457 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3459 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3460 next_point = &(st->last_in_packet_buffer->next);
3462 next_point = &s->packet_buffer;
3467 uint64_t max= av_rescale_q(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base);
3468 if( st->interleaver_chunk_size + pkt->size <= s->max_chunk_size-1U
3469 && st->interleaver_chunk_duration + pkt->duration <= max-1U){
3470 st->interleaver_chunk_size += pkt->size;
3471 st->interleaver_chunk_duration += pkt->duration;
3474 st->interleaver_chunk_size =
3475 st->interleaver_chunk_duration = 0;
3476 this_pktl->pkt.flags |= CHUNK_START;
3480 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3482 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
3483 || !compare(s, &(*next_point)->pkt, pkt))){
3484 next_point= &(*next_point)->next;
3489 next_point = &(s->packet_buffer_end->next);
3492 assert(!*next_point);
3494 s->packet_buffer_end= this_pktl;
3497 this_pktl->next= *next_point;
3499 s->streams[pkt->stream_index]->last_in_packet_buffer=
3500 *next_point= this_pktl;
3504 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3506 AVStream *st = s->streams[ pkt ->stream_index];
3507 AVStream *st2= s->streams[ next->stream_index];
3508 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3510 if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
3511 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
3512 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
3514 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
3515 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
3518 comp= (ts>ts2) - (ts<ts2);
3522 return pkt->stream_index < next->stream_index;
3526 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3527 AVPacket *pkt, int flush)
3530 int stream_count=0, noninterleaved_count=0;
3531 int64_t delta_dts_max = 0;
3535 ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3540 for(i=0; i < s->nb_streams; i++) {
3541 if (s->streams[i]->last_in_packet_buffer) {
3543 } else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3544 ++noninterleaved_count;
3548 if (s->nb_streams == stream_count) {
3551 for(i=0; i < s->nb_streams; i++) {
3552 if (s->streams[i]->last_in_packet_buffer) {
3554 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
3555 s->streams[i]->time_base,
3557 av_rescale_q(s->packet_buffer->pkt.dts,
3558 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
3560 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
3563 if(s->nb_streams == stream_count+noninterleaved_count &&
3564 delta_dts_max > 20*AV_TIME_BASE) {
3565 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
3569 if(stream_count && flush){
3570 pktl= s->packet_buffer;
3573 s->packet_buffer= pktl->next;
3574 if(!s->packet_buffer)
3575 s->packet_buffer_end= NULL;
3577 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3578 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3582 av_init_packet(out);
3587 #if FF_API_INTERLEAVE_PACKET
3588 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3589 AVPacket *pkt, int flush)
3591 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3596 * Interleave an AVPacket correctly so it can be muxed.
3597 * @param out the interleaved packet will be output here
3598 * @param in the input packet
3599 * @param flush 1 if no further packets are available as input and all
3600 * remaining packets should be output
3601 * @return 1 if a packet was output, 0 if no packet could be output,
3602 * < 0 if an error occurred
3604 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3605 if (s->oformat->interleave_packet) {
3606 int ret = s->oformat->interleave_packet(s, out, in, flush);
3611 return ff_interleave_packet_per_dts(s, out, in, flush);
3614 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3618 AVStream *st= s->streams[ pkt->stream_index];
3620 //FIXME/XXX/HACK drop zero sized packets
3621 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3624 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
3625 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
3626 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3629 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3630 return AVERROR(EINVAL);
3632 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3638 int ret= interleave_packet(s, &opkt, pkt, flush);
3639 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3642 ret= s->oformat->write_packet(s, &opkt);
3644 s->streams[opkt.stream_index]->nb_frames++;
3646 av_free_packet(&opkt);
3651 if(s->pb && s->pb->error)
3652 return s->pb->error;
3656 int av_write_trailer(AVFormatContext *s)
3662 ret= interleave_packet(s, &pkt, NULL, 1);
3663 if(ret<0) //FIXME cleanup needed for ret<0 ?
3668 ret= s->oformat->write_packet(s, &pkt);
3670 s->streams[pkt.stream_index]->nb_frames++;
3672 av_free_packet(&pkt);
3676 if(s->pb && s->pb->error)
3680 if(s->oformat->write_trailer)
3681 ret = s->oformat->write_trailer(s);
3686 ret = s->pb ? s->pb->error : 0;
3687 for(i=0;i<s->nb_streams;i++) {
3688 av_freep(&s->streams[i]->priv_data);
3689 av_freep(&s->streams[i]->index_entries);
3691 if (s->oformat->priv_class)
3692 av_opt_free(s->priv_data);
3693 av_freep(&s->priv_data);
3697 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3698 int64_t *dts, int64_t *wall)
3700 if (!s->oformat || !s->oformat->get_output_timestamp)
3701 return AVERROR(ENOSYS);
3702 s->oformat->get_output_timestamp(s, stream, dts, wall);
3706 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3709 AVProgram *program=NULL;
3712 if (idx >= ac->nb_streams) {
3713 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3717 for(i=0; i<ac->nb_programs; i++){
3718 if(ac->programs[i]->id != progid)
3720 program = ac->programs[i];
3721 for(j=0; j<program->nb_stream_indexes; j++)
3722 if(program->stream_index[j] == idx)
3725 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3728 program->stream_index = tmp;
3729 program->stream_index[program->nb_stream_indexes++] = idx;
3734 static void print_fps(double d, const char *postfix){
3735 uint64_t v= lrintf(d*100);
3736 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3737 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3738 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3741 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3743 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3744 AVDictionaryEntry *tag=NULL;
3746 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3747 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3748 if(strcmp("language", tag->key)){
3749 const char *p = tag->value;
3750 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3753 size_t len = strcspn(p, "\xd\xa");
3754 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3755 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3757 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3758 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3761 av_log(ctx, AV_LOG_INFO, "\n");
3767 /* "user interface" functions */
3768 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3771 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3772 AVStream *st = ic->streams[i];
3773 int g = av_gcd(st->time_base.num, st->time_base.den);
3774 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3775 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3776 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3777 /* the pid is an important information, so we display it */
3778 /* XXX: add a generic system */
3779 if (flags & AVFMT_SHOW_IDS)
3780 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3782 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3783 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3784 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3785 if (st->sample_aspect_ratio.num && // default
3786 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3787 AVRational display_aspect_ratio;
3788 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3789 st->codec->width*st->sample_aspect_ratio.num,
3790 st->codec->height*st->sample_aspect_ratio.den,
3792 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3793 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3794 display_aspect_ratio.num, display_aspect_ratio.den);
3796 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3797 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3798 print_fps(av_q2d(st->avg_frame_rate), "fps");
3799 if(st->r_frame_rate.den && st->r_frame_rate.num)
3800 print_fps(av_q2d(st->r_frame_rate), "tbr");
3801 if(st->time_base.den && st->time_base.num)
3802 print_fps(1/av_q2d(st->time_base), "tbn");
3803 if(st->codec->time_base.den && st->codec->time_base.num)
3804 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3806 if (st->disposition & AV_DISPOSITION_DEFAULT)
3807 av_log(NULL, AV_LOG_INFO, " (default)");
3808 if (st->disposition & AV_DISPOSITION_DUB)
3809 av_log(NULL, AV_LOG_INFO, " (dub)");
3810 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3811 av_log(NULL, AV_LOG_INFO, " (original)");
3812 if (st->disposition & AV_DISPOSITION_COMMENT)
3813 av_log(NULL, AV_LOG_INFO, " (comment)");
3814 if (st->disposition & AV_DISPOSITION_LYRICS)
3815 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3816 if (st->disposition & AV_DISPOSITION_KARAOKE)
3817 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3818 if (st->disposition & AV_DISPOSITION_FORCED)
3819 av_log(NULL, AV_LOG_INFO, " (forced)");
3820 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3821 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3822 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3823 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3824 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3825 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3826 av_log(NULL, AV_LOG_INFO, "\n");
3827 dump_metadata(NULL, st->metadata, " ");
3830 void av_dump_format(AVFormatContext *ic,
3836 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3837 if (ic->nb_streams && !printed)
3840 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3841 is_output ? "Output" : "Input",
3843 is_output ? ic->oformat->name : ic->iformat->name,
3844 is_output ? "to" : "from", url);
3845 dump_metadata(NULL, ic->metadata, " ");
3847 av_log(NULL, AV_LOG_INFO, " Duration: ");
3848 if (ic->duration != AV_NOPTS_VALUE) {
3849 int hours, mins, secs, us;
3850 secs = ic->duration / AV_TIME_BASE;
3851 us = ic->duration % AV_TIME_BASE;
3856 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3857 (100 * us) / AV_TIME_BASE);
3859 av_log(NULL, AV_LOG_INFO, "N/A");
3861 if (ic->start_time != AV_NOPTS_VALUE) {
3863 av_log(NULL, AV_LOG_INFO, ", start: ");
3864 secs = ic->start_time / AV_TIME_BASE;
3865 us = abs(ic->start_time % AV_TIME_BASE);
3866 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3867 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3869 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3871 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3873 av_log(NULL, AV_LOG_INFO, "N/A");
3875 av_log(NULL, AV_LOG_INFO, "\n");
3877 for (i = 0; i < ic->nb_chapters; i++) {
3878 AVChapter *ch = ic->chapters[i];
3879 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3880 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3881 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3883 dump_metadata(NULL, ch->metadata, " ");
3885 if(ic->nb_programs) {
3886 int j, k, total = 0;
3887 for(j=0; j<ic->nb_programs; j++) {
3888 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3890 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3891 name ? name->value : "");
3892 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3893 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3894 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3895 printed[ic->programs[j]->stream_index[k]] = 1;
3897 total += ic->programs[j]->nb_stream_indexes;
3899 if (total < ic->nb_streams)
3900 av_log(NULL, AV_LOG_INFO, " No Program\n");
3902 for(i=0;i<ic->nb_streams;i++)
3904 dump_stream_format(ic, i, index, is_output);
3909 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3910 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3912 return av_gettime();
3916 uint64_t ff_ntp_time(void)
3918 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3921 int av_get_frame_filename(char *buf, int buf_size,
3922 const char *path, int number)
3925 char *q, buf1[20], c;
3926 int nd, len, percentd_found;
3938 while (isdigit(*p)) {
3939 nd = nd * 10 + *p++ - '0';
3942 } while (isdigit(c));
3951 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3953 if ((q - buf + len) > buf_size - 1)
3955 memcpy(q, buf1, len);
3963 if ((q - buf) < buf_size - 1)
3967 if (!percentd_found)
3976 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3980 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3982 for(i=0;i<size;i+=16) {
3989 PRINT(" %02x", buf[i+j]);
3994 for(j=0;j<len;j++) {
3996 if (c < ' ' || c > '~')
4005 void av_hex_dump(FILE *f, uint8_t *buf, int size)
4007 hex_dump_internal(NULL, f, 0, buf, size);
4010 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
4012 hex_dump_internal(avcl, NULL, level, buf, size);
4015 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
4018 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
4019 PRINT("stream #%d:\n", pkt->stream_index);
4020 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
4021 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4022 /* DTS is _always_ valid after av_read_frame() */
4024 if (pkt->dts == AV_NOPTS_VALUE)
4027 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4028 /* PTS may not be known if B-frames are present. */
4030 if (pkt->pts == AV_NOPTS_VALUE)
4033 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4035 PRINT(" size=%d\n", pkt->size);
4038 av_hex_dump(f, pkt->data, pkt->size);
4042 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
4044 AVRational tb = { 1, AV_TIME_BASE };
4045 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
4049 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
4051 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4055 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
4057 AVRational tb = { 1, AV_TIME_BASE };
4058 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
4062 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
4065 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4068 void av_url_split(char *proto, int proto_size,
4069 char *authorization, int authorization_size,
4070 char *hostname, int hostname_size,
4072 char *path, int path_size,
4075 const char *p, *ls, *at, *col, *brk;
4077 if (port_ptr) *port_ptr = -1;
4078 if (proto_size > 0) proto[0] = 0;
4079 if (authorization_size > 0) authorization[0] = 0;
4080 if (hostname_size > 0) hostname[0] = 0;
4081 if (path_size > 0) path[0] = 0;
4083 /* parse protocol */
4084 if ((p = strchr(url, ':'))) {
4085 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4090 /* no protocol means plain filename */
4091 av_strlcpy(path, url, path_size);
4095 /* separate path from hostname */
4096 ls = strchr(p, '/');
4098 ls = strchr(p, '?');
4100 av_strlcpy(path, ls, path_size);
4102 ls = &p[strlen(p)]; // XXX
4104 /* the rest is hostname, use that to parse auth/port */
4106 /* authorization (user[:pass]@hostname) */
4107 if ((at = strchr(p, '@')) && at < ls) {
4108 av_strlcpy(authorization, p,
4109 FFMIN(authorization_size, at + 1 - p));
4110 p = at + 1; /* skip '@' */
4113 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4115 av_strlcpy(hostname, p + 1,
4116 FFMIN(hostname_size, brk - p));
4117 if (brk[1] == ':' && port_ptr)
4118 *port_ptr = atoi(brk + 2);
4119 } else if ((col = strchr(p, ':')) && col < ls) {
4120 av_strlcpy(hostname, p,
4121 FFMIN(col + 1 - p, hostname_size));
4122 if (port_ptr) *port_ptr = atoi(col + 1);
4124 av_strlcpy(hostname, p,
4125 FFMIN(ls + 1 - p, hostname_size));
4129 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4132 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4135 'C', 'D', 'E', 'F' };
4136 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4139 'c', 'd', 'e', 'f' };
4140 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4142 for(i = 0; i < s; i++) {
4143 buff[i * 2] = hex_table[src[i] >> 4];
4144 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4150 int ff_hex_to_data(uint8_t *data, const char *p)
4157 p += strspn(p, SPACE_CHARS);
4160 c = toupper((unsigned char) *p++);
4161 if (c >= '0' && c <= '9')
4163 else if (c >= 'A' && c <= 'F')
4178 #if FF_API_SET_PTS_INFO
4179 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4180 unsigned int pts_num, unsigned int pts_den)
4182 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4186 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4187 unsigned int pts_num, unsigned int pts_den)
4190 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
4191 if(new_tb.num != pts_num)
4192 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
4194 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
4196 if(new_tb.num <= 0 || new_tb.den <= 0) {
4197 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", new_tb.num, new_tb.den, s->index);
4200 s->time_base = new_tb;
4201 s->pts_wrap_bits = pts_wrap_bits;
4204 int ff_url_join(char *str, int size, const char *proto,
4205 const char *authorization, const char *hostname,
4206 int port, const char *fmt, ...)
4209 struct addrinfo hints = { 0 }, *ai;
4214 av_strlcatf(str, size, "%s://", proto);
4215 if (authorization && authorization[0])
4216 av_strlcatf(str, size, "%s@", authorization);
4217 #if CONFIG_NETWORK && defined(AF_INET6)
4218 /* Determine if hostname is a numerical IPv6 address,
4219 * properly escape it within [] in that case. */
4220 hints.ai_flags = AI_NUMERICHOST;
4221 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
4222 if (ai->ai_family == AF_INET6) {
4223 av_strlcat(str, "[", size);
4224 av_strlcat(str, hostname, size);
4225 av_strlcat(str, "]", size);
4227 av_strlcat(str, hostname, size);
4232 /* Not an IPv6 address, just output the plain string. */
4233 av_strlcat(str, hostname, size);
4236 av_strlcatf(str, size, ":%d", port);
4239 int len = strlen(str);
4242 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
4248 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
4249 AVFormatContext *src)
4254 local_pkt.stream_index = dst_stream;
4255 if (pkt->pts != AV_NOPTS_VALUE)
4256 local_pkt.pts = av_rescale_q(pkt->pts,
4257 src->streams[pkt->stream_index]->time_base,
4258 dst->streams[dst_stream]->time_base);
4259 if (pkt->dts != AV_NOPTS_VALUE)
4260 local_pkt.dts = av_rescale_q(pkt->dts,
4261 src->streams[pkt->stream_index]->time_base,
4262 dst->streams[dst_stream]->time_base);
4263 return av_write_frame(dst, &local_pkt);
4266 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4269 const char *ptr = str;
4271 /* Parse key=value pairs. */
4274 char *dest = NULL, *dest_end;
4275 int key_len, dest_len = 0;
4277 /* Skip whitespace and potential commas. */
4278 while (*ptr && (isspace(*ptr) || *ptr == ','))
4285 if (!(ptr = strchr(key, '=')))
4288 key_len = ptr - key;
4290 callback_get_buf(context, key, key_len, &dest, &dest_len);
4291 dest_end = dest + dest_len - 1;
4295 while (*ptr && *ptr != '\"') {
4299 if (dest && dest < dest_end)
4303 if (dest && dest < dest_end)
4311 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
4312 if (dest && dest < dest_end)
4320 int ff_find_stream_index(AVFormatContext *s, int id)
4323 for (i = 0; i < s->nb_streams; i++) {
4324 if (s->streams[i]->id == id)
4330 void ff_make_absolute_url(char *buf, int size, const char *base,
4334 /* Absolute path, relative to the current server */
4335 if (base && strstr(base, "://") && rel[0] == '/') {
4337 av_strlcpy(buf, base, size);
4338 sep = strstr(buf, "://");
4341 sep = strchr(sep, '/');
4345 av_strlcat(buf, rel, size);
4348 /* If rel actually is an absolute url, just copy it */
4349 if (!base || strstr(rel, "://") || rel[0] == '/') {
4350 av_strlcpy(buf, rel, size);
4354 av_strlcpy(buf, base, size);
4355 /* Remove the file name from the base url */
4356 sep = strrchr(buf, '/');
4361 while (av_strstart(rel, "../", NULL) && sep) {
4362 /* Remove the path delimiter at the end */
4364 sep = strrchr(buf, '/');
4365 /* If the next directory name to pop off is "..", break here */
4366 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4367 /* Readd the slash we just removed */
4368 av_strlcat(buf, "/", size);
4371 /* Cut off the directory name */
4378 av_strlcat(buf, rel, size);
4381 int64_t ff_iso8601_to_unix_time(const char *datestr)
4384 struct tm time1 = {0}, time2 = {0};
4386 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
4387 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
4389 return av_timegm(&time2);
4391 return av_timegm(&time1);
4393 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4394 "the date string.\n");
4399 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
4402 if (ofmt->query_codec)
4403 return ofmt->query_codec(codec_id, std_compliance);
4404 else if (ofmt->codec_tag)
4405 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4406 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4407 codec_id == ofmt->subtitle_codec)
4410 return AVERROR_PATCHWELCOME;
4413 int avformat_network_init(void)
4417 ff_network_inited_globally = 1;
4418 if ((ret = ff_network_init()) < 0)
4425 int avformat_network_deinit(void)
4434 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4435 uint64_t channel_layout, int32_t sample_rate,
4436 int32_t width, int32_t height)
4442 return AVERROR(EINVAL);
4445 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4447 if (channel_layout) {
4449 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4453 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4455 if (width || height) {
4457 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4459 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4461 return AVERROR(ENOMEM);
4462 bytestream_put_le32(&data, flags);
4464 bytestream_put_le32(&data, channels);
4466 bytestream_put_le64(&data, channel_layout);
4468 bytestream_put_le32(&data, sample_rate);
4469 if (width || height) {
4470 bytestream_put_le32(&data, width);
4471 bytestream_put_le32(&data, height);
4476 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4478 return ff_codec_bmp_tags;
4480 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4482 return ff_codec_wav_tags;
4485 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4487 AVRational undef = {0, 1};
4488 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4489 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4490 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4492 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4493 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4494 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4495 stream_sample_aspect_ratio = undef;
4497 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4498 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4499 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4500 frame_sample_aspect_ratio = undef;
4502 if (stream_sample_aspect_ratio.num)
4503 return stream_sample_aspect_ratio;
4505 return frame_sample_aspect_ratio;