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->skip_samples && st->codec->sample_rate && st->time_base.num)
946 cur_dts -= av_rescale_q(st->skip_samples,
947 (AVRational){ 1, st->codec->sample_rate },
949 if(st->first_dts != AV_NOPTS_VALUE){
950 cur_dts= st->first_dts;
951 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
952 if(pktl->pkt.stream_index == stream_index){
953 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
958 if(pktl && pktl->pkt.dts != st->first_dts) {
959 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));
963 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
966 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
967 st->first_dts = cur_dts;
968 }else if(st->cur_dts != RELATIVE_TS_BASE)
971 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
972 if(pktl->pkt.stream_index != stream_index)
974 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
975 && !pktl->pkt.duration){
976 pktl->pkt.dts= cur_dts;
977 if(!st->codec->has_b_frames)
978 pktl->pkt.pts= cur_dts;
979 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
980 pktl->pkt.duration = duration;
983 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
986 st->cur_dts= cur_dts;
989 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
990 AVCodecParserContext *pc, AVPacket *pkt)
992 int num, den, presentation_delayed, delay, i;
995 if (s->flags & AVFMT_FLAG_NOFILLIN)
998 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
999 pkt->dts= AV_NOPTS_VALUE;
1001 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1002 //FIXME Set low_delay = 0 when has_b_frames = 1
1003 st->codec->has_b_frames = 1;
1005 /* do we have a video B-frame ? */
1006 delay= st->codec->has_b_frames;
1007 presentation_delayed = 0;
1009 /* XXX: need has_b_frame, but cannot get it if the codec is
1012 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1013 presentation_delayed = 1;
1015 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){
1016 pkt->dts -= 1LL<<st->pts_wrap_bits;
1019 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1020 // we take the conservative approach and discard both
1021 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1022 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1023 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1024 pkt->dts= AV_NOPTS_VALUE;
1027 if (pkt->duration == 0) {
1028 compute_frame_duration(&num, &den, st, pc, pkt);
1030 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1033 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1034 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1036 /* correct timestamps with byte offset if demuxers only have timestamps
1037 on packet boundaries */
1038 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1039 /* this will estimate bitrate based on this frame's duration and size */
1040 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1041 if(pkt->pts != AV_NOPTS_VALUE)
1043 if(pkt->dts != AV_NOPTS_VALUE)
1047 if (pc && pc->dts_sync_point >= 0) {
1048 // we have synchronization info from the parser
1049 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1051 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1052 if (pkt->dts != AV_NOPTS_VALUE) {
1053 // got DTS from the stream, update reference timestamp
1054 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1055 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1056 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1057 // compute DTS based on reference timestamp
1058 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1059 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1061 if (pc->dts_sync_point > 0)
1062 st->reference_dts = pkt->dts; // new reference
1066 /* This may be redundant, but it should not hurt. */
1067 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1068 presentation_delayed = 1;
1070 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1071 // presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1072 /* interpolate PTS and DTS if they are not present */
1073 //We skip H264 currently because delay and has_b_frames are not reliably set
1074 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1075 if (presentation_delayed) {
1076 /* DTS = decompression timestamp */
1077 /* PTS = presentation timestamp */
1078 if (pkt->dts == AV_NOPTS_VALUE)
1079 pkt->dts = st->last_IP_pts;
1080 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1081 if (pkt->dts == AV_NOPTS_VALUE)
1082 pkt->dts = st->cur_dts;
1084 /* this is tricky: the dts must be incremented by the duration
1085 of the frame we are displaying, i.e. the last I- or P-frame */
1086 if (st->last_IP_duration == 0)
1087 st->last_IP_duration = pkt->duration;
1088 if(pkt->dts != AV_NOPTS_VALUE)
1089 st->cur_dts = pkt->dts + st->last_IP_duration;
1090 st->last_IP_duration = pkt->duration;
1091 st->last_IP_pts= pkt->pts;
1092 /* cannot compute PTS if not present (we can compute it only
1093 by knowing the future */
1094 } else if (pkt->pts != AV_NOPTS_VALUE ||
1095 pkt->dts != AV_NOPTS_VALUE ||
1097 int duration = pkt->duration;
1099 if(pkt->pts != AV_NOPTS_VALUE && duration){
1100 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1101 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1102 if( old_diff < new_diff && old_diff < (duration>>3)
1103 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1104 && (!strcmp(s->iformat->name, "mpeg") ||
1105 !strcmp(s->iformat->name, "mpegts"))){
1106 pkt->pts += duration;
1107 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1108 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1109 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1113 /* presentation is not delayed : PTS and DTS are the same */
1114 if (pkt->pts == AV_NOPTS_VALUE)
1115 pkt->pts = pkt->dts;
1116 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1118 if (pkt->pts == AV_NOPTS_VALUE)
1119 pkt->pts = st->cur_dts;
1120 pkt->dts = pkt->pts;
1121 if (pkt->pts != AV_NOPTS_VALUE)
1122 st->cur_dts = pkt->pts + duration;
1126 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1127 st->pts_buffer[0]= pkt->pts;
1128 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1129 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1130 if(pkt->dts == AV_NOPTS_VALUE)
1131 pkt->dts= st->pts_buffer[0];
1132 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1133 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1135 if(pkt->dts > st->cur_dts)
1136 st->cur_dts = pkt->dts;
1139 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1140 // presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1143 if(is_intra_only(st->codec))
1144 pkt->flags |= AV_PKT_FLAG_KEY;
1146 pkt->convergence_duration = pc->convergence_duration;
1149 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1152 AVPacketList *pktl = *pkt_buf;
1153 *pkt_buf = pktl->next;
1154 av_free_packet(&pktl->pkt);
1157 *pkt_buf_end = NULL;
1161 * Parse a packet, add all split parts to parse_queue
1163 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1165 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1167 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1168 AVStream *st = s->streams[stream_index];
1169 uint8_t *data = pkt ? pkt->data : NULL;
1170 int size = pkt ? pkt->size : 0;
1171 int ret = 0, got_output = 0;
1174 av_init_packet(&flush_pkt);
1177 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1178 // preserve 0-size sync packets
1179 compute_pkt_fields(s, st, st->parser, pkt);
1182 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1185 av_init_packet(&out_pkt);
1186 len = av_parser_parse2(st->parser, st->codec,
1187 &out_pkt.data, &out_pkt.size, data, size,
1188 pkt->pts, pkt->dts, pkt->pos);
1190 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1191 /* increment read pointer */
1195 got_output = !!out_pkt.size;
1200 /* set the duration */
1201 out_pkt.duration = 0;
1202 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1203 if (st->codec->sample_rate > 0) {
1204 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1205 (AVRational){ 1, st->codec->sample_rate },
1209 } else if (st->codec->time_base.num != 0 &&
1210 st->codec->time_base.den != 0) {
1211 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1212 st->codec->time_base,
1217 out_pkt.stream_index = st->index;
1218 out_pkt.pts = st->parser->pts;
1219 out_pkt.dts = st->parser->dts;
1220 out_pkt.pos = st->parser->pos;
1222 if (st->parser->key_frame == 1 ||
1223 (st->parser->key_frame == -1 &&
1224 st->parser->pict_type == AV_PICTURE_TYPE_I))
1225 out_pkt.flags |= AV_PKT_FLAG_KEY;
1227 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1228 out_pkt.flags |= AV_PKT_FLAG_KEY;
1230 compute_pkt_fields(s, st, st->parser, &out_pkt);
1232 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1233 out_pkt.flags & AV_PKT_FLAG_KEY) {
1234 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? out_pkt.pos : st->parser->frame_offset;
1235 ff_reduce_index(s, st->index);
1236 av_add_index_entry(st, pos, out_pkt.dts,
1237 0, 0, AVINDEX_KEYFRAME);
1240 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1241 out_pkt.destruct = pkt->destruct;
1242 pkt->destruct = NULL;
1244 if ((ret = av_dup_packet(&out_pkt)) < 0)
1247 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1248 av_free_packet(&out_pkt);
1249 ret = AVERROR(ENOMEM);
1255 /* end of the stream => close and free the parser */
1256 if (pkt == &flush_pkt) {
1257 av_parser_close(st->parser);
1262 av_free_packet(pkt);
1266 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1267 AVPacketList **pkt_buffer_end,
1271 av_assert0(*pkt_buffer);
1274 *pkt_buffer = pktl->next;
1276 *pkt_buffer_end = NULL;
1281 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1283 int ret = 0, i, got_packet = 0;
1285 av_init_packet(pkt);
1287 while (!got_packet && !s->parse_queue) {
1291 /* read next packet */
1292 ret = ff_read_packet(s, &cur_pkt);
1294 if (ret == AVERROR(EAGAIN))
1296 /* flush the parsers */
1297 for(i = 0; i < s->nb_streams; i++) {
1299 if (st->parser && st->need_parsing)
1300 parse_packet(s, NULL, st->index);
1302 /* all remaining packets are now in parse_queue =>
1303 * really terminate parsing */
1307 st = s->streams[cur_pkt.stream_index];
1309 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1310 cur_pkt.dts != AV_NOPTS_VALUE &&
1311 cur_pkt.pts < cur_pkt.dts) {
1312 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1313 cur_pkt.stream_index,
1314 av_ts2str(cur_pkt.pts),
1315 av_ts2str(cur_pkt.dts),
1318 if (s->debug & FF_FDEBUG_TS)
1319 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1320 cur_pkt.stream_index,
1321 av_ts2str(cur_pkt.pts),
1322 av_ts2str(cur_pkt.dts),
1327 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1328 st->parser = av_parser_init(st->codec->codec_id);
1330 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1331 "%s, packets or times may be invalid.\n",
1332 avcodec_get_name(st->codec->codec_id));
1333 /* no parser available: just output the raw packets */
1334 st->need_parsing = AVSTREAM_PARSE_NONE;
1335 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1336 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1337 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1338 st->parser->flags |= PARSER_FLAG_ONCE;
1339 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1340 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1344 if (!st->need_parsing || !st->parser) {
1345 /* no parsing needed: we just output the packet as is */
1347 compute_pkt_fields(s, st, NULL, pkt);
1348 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1349 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1350 ff_reduce_index(s, st->index);
1351 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1354 } else if (st->discard < AVDISCARD_ALL) {
1355 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1359 av_free_packet(&cur_pkt);
1361 if (pkt->flags & AV_PKT_FLAG_KEY)
1362 st->skip_to_keyframe = 0;
1363 if (st->skip_to_keyframe) {
1364 av_free_packet(&cur_pkt);
1369 if (!got_packet && s->parse_queue)
1370 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1372 if(s->debug & FF_FDEBUG_TS)
1373 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1375 av_ts2str(pkt->pts),
1376 av_ts2str(pkt->dts),
1384 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1386 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1391 ret = s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1392 &s->packet_buffer_end,
1394 read_frame_internal(s, pkt);
1399 AVPacketList *pktl = s->packet_buffer;
1402 AVPacket *next_pkt = &pktl->pkt;
1404 if (next_pkt->dts != AV_NOPTS_VALUE) {
1405 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1406 // last dts seen for this stream. if any of packets following
1407 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1408 int64_t last_dts = next_pkt->dts;
1409 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1410 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1411 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1412 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1413 next_pkt->pts = pktl->pkt.dts;
1415 if (last_dts != AV_NOPTS_VALUE) {
1416 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1417 last_dts = pktl->pkt.dts;
1422 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1423 // Fixing the last reference frame had none pts issue (For MXF etc).
1424 // We only do this when
1426 // 2. we are not able to resolve a pts value for current packet.
1427 // 3. the packets for this stream at the end of the files had valid dts.
1428 next_pkt->pts = last_dts + next_pkt->duration;
1430 pktl = s->packet_buffer;
1433 /* read packet from packet buffer, if there is data */
1434 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1435 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1436 ret = read_from_packet_buffer(&s->packet_buffer,
1437 &s->packet_buffer_end, pkt);
1442 ret = read_frame_internal(s, pkt);
1444 if (pktl && ret != AVERROR(EAGAIN)) {
1451 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1452 &s->packet_buffer_end)) < 0)
1453 return AVERROR(ENOMEM);
1458 if(s->streams[pkt->stream_index]->skip_samples) {
1459 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1460 AV_WL32(p, s->streams[pkt->stream_index]->skip_samples);
1461 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", s->streams[pkt->stream_index]->skip_samples);
1462 s->streams[pkt->stream_index]->skip_samples = 0;
1465 if (is_relative(pkt->dts))
1466 pkt->dts -= RELATIVE_TS_BASE;
1467 if (is_relative(pkt->pts))
1468 pkt->pts -= RELATIVE_TS_BASE;
1472 /* XXX: suppress the packet queue */
1473 static void flush_packet_queue(AVFormatContext *s)
1475 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1476 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1477 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1479 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1482 /*******************************************************/
1485 int av_find_default_stream_index(AVFormatContext *s)
1487 int first_audio_index = -1;
1491 if (s->nb_streams <= 0)
1493 for(i = 0; i < s->nb_streams; i++) {
1495 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1496 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1499 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1500 first_audio_index = i;
1502 return first_audio_index >= 0 ? first_audio_index : 0;
1506 * Flush the frame reader.
1508 void ff_read_frame_flush(AVFormatContext *s)
1513 flush_packet_queue(s);
1515 /* for each stream, reset read state */
1516 for(i = 0; i < s->nb_streams; i++) {
1520 av_parser_close(st->parser);
1523 st->last_IP_pts = AV_NOPTS_VALUE;
1524 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1525 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1526 st->reference_dts = AV_NOPTS_VALUE;
1528 st->probe_packets = MAX_PROBE_PACKETS;
1530 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1531 st->pts_buffer[j]= AV_NOPTS_VALUE;
1535 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1539 for(i = 0; i < s->nb_streams; i++) {
1540 AVStream *st = s->streams[i];
1542 st->cur_dts = av_rescale(timestamp,
1543 st->time_base.den * (int64_t)ref_st->time_base.num,
1544 st->time_base.num * (int64_t)ref_st->time_base.den);
1548 void ff_reduce_index(AVFormatContext *s, int stream_index)
1550 AVStream *st= s->streams[stream_index];
1551 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1553 if((unsigned)st->nb_index_entries >= max_entries){
1555 for(i=0; 2*i<st->nb_index_entries; i++)
1556 st->index_entries[i]= st->index_entries[2*i];
1557 st->nb_index_entries= i;
1561 int ff_add_index_entry(AVIndexEntry **index_entries,
1562 int *nb_index_entries,
1563 unsigned int *index_entries_allocated_size,
1564 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1566 AVIndexEntry *entries, *ie;
1569 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1572 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1573 timestamp -= RELATIVE_TS_BASE;
1575 entries = av_fast_realloc(*index_entries,
1576 index_entries_allocated_size,
1577 (*nb_index_entries + 1) *
1578 sizeof(AVIndexEntry));
1582 *index_entries= entries;
1584 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1587 index= (*nb_index_entries)++;
1588 ie= &entries[index];
1589 assert(index==0 || ie[-1].timestamp < timestamp);
1591 ie= &entries[index];
1592 if(ie->timestamp != timestamp){
1593 if(ie->timestamp <= timestamp)
1595 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1596 (*nb_index_entries)++;
1597 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1598 distance= ie->min_distance;
1602 ie->timestamp = timestamp;
1603 ie->min_distance= distance;
1610 int av_add_index_entry(AVStream *st,
1611 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1613 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1614 &st->index_entries_allocated_size, pos,
1615 timestamp, size, distance, flags);
1618 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1619 int64_t wanted_timestamp, int flags)
1627 //optimize appending index entries at the end
1628 if(b && entries[b-1].timestamp < wanted_timestamp)
1633 timestamp = entries[m].timestamp;
1634 if(timestamp >= wanted_timestamp)
1636 if(timestamp <= wanted_timestamp)
1639 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1641 if(!(flags & AVSEEK_FLAG_ANY)){
1642 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1643 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1652 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1655 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1656 wanted_timestamp, flags);
1659 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1661 AVInputFormat *avif= s->iformat;
1662 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1663 int64_t ts_min, ts_max, ts;
1668 if (stream_index < 0)
1671 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1674 ts_min= AV_NOPTS_VALUE;
1675 pos_limit= -1; //gcc falsely says it may be uninitialized
1677 st= s->streams[stream_index];
1678 if(st->index_entries){
1681 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()
1682 index= FFMAX(index, 0);
1683 e= &st->index_entries[index];
1685 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1687 ts_min= e->timestamp;
1688 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1689 pos_min, av_ts2str(ts_min));
1694 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1695 assert(index < st->nb_index_entries);
1697 e= &st->index_entries[index];
1698 assert(e->timestamp >= target_ts);
1700 ts_max= e->timestamp;
1701 pos_limit= pos_max - e->min_distance;
1702 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1703 pos_max, pos_limit, av_ts2str(ts_max));
1707 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1712 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1715 ff_read_frame_flush(s);
1716 ff_update_cur_dts(s, st, ts);
1721 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1722 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1723 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1724 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1727 int64_t start_pos, filesize;
1730 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1732 if(ts_min == AV_NOPTS_VALUE){
1733 pos_min = s->data_offset;
1734 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1735 if (ts_min == AV_NOPTS_VALUE)
1739 if(ts_min >= target_ts){
1744 if(ts_max == AV_NOPTS_VALUE){
1746 filesize = avio_size(s->pb);
1747 pos_max = filesize - 1;
1750 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1752 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1753 if (ts_max == AV_NOPTS_VALUE)
1757 int64_t tmp_pos= pos_max + 1;
1758 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1759 if(tmp_ts == AV_NOPTS_VALUE)
1763 if(tmp_pos >= filesize)
1769 if(ts_max <= target_ts){
1774 if(ts_min > ts_max){
1776 }else if(ts_min == ts_max){
1781 while (pos_min < pos_limit) {
1782 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1783 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1784 assert(pos_limit <= pos_max);
1787 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1788 // interpolate position (better than dichotomy)
1789 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1790 + pos_min - approximate_keyframe_distance;
1791 }else if(no_change==1){
1792 // bisection, if interpolation failed to change min or max pos last time
1793 pos = (pos_min + pos_limit)>>1;
1795 /* linear search if bisection failed, can only happen if there
1796 are very few or no keyframes between min/max */
1801 else if(pos > pos_limit)
1805 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1810 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1811 pos_min, pos, pos_max,
1812 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1813 pos_limit, start_pos, no_change);
1814 if(ts == AV_NOPTS_VALUE){
1815 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1818 assert(ts != AV_NOPTS_VALUE);
1819 if (target_ts <= ts) {
1820 pos_limit = start_pos - 1;
1824 if (target_ts >= ts) {
1830 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1831 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1834 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1836 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1837 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1838 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1844 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1845 int64_t pos_min, pos_max;
1847 pos_min = s->data_offset;
1848 pos_max = avio_size(s->pb) - 1;
1850 if (pos < pos_min) pos= pos_min;
1851 else if(pos > pos_max) pos= pos_max;
1853 avio_seek(s->pb, pos, SEEK_SET);
1858 static int seek_frame_generic(AVFormatContext *s,
1859 int stream_index, int64_t timestamp, int flags)
1866 st = s->streams[stream_index];
1868 index = av_index_search_timestamp(st, timestamp, flags);
1870 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1873 if(index < 0 || index==st->nb_index_entries-1){
1877 if(st->nb_index_entries){
1878 assert(st->index_entries);
1879 ie= &st->index_entries[st->nb_index_entries-1];
1880 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1882 ff_update_cur_dts(s, st, ie->timestamp);
1884 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1890 read_status = av_read_frame(s, &pkt);
1891 } while (read_status == AVERROR(EAGAIN));
1892 if (read_status < 0)
1894 av_free_packet(&pkt);
1895 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1896 if(pkt.flags & AV_PKT_FLAG_KEY)
1898 if(nonkey++ > 1000 && st->codec->codec_id != CODEC_ID_CDGRAPHICS){
1899 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);
1904 index = av_index_search_timestamp(st, timestamp, flags);
1909 ff_read_frame_flush(s);
1910 AV_NOWARN_DEPRECATED(
1911 if (s->iformat->read_seek){
1912 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1916 ie = &st->index_entries[index];
1917 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1919 ff_update_cur_dts(s, st, ie->timestamp);
1924 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1925 int64_t timestamp, int flags)
1930 if (flags & AVSEEK_FLAG_BYTE) {
1931 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1933 ff_read_frame_flush(s);
1934 return seek_frame_byte(s, stream_index, timestamp, flags);
1937 if(stream_index < 0){
1938 stream_index= av_find_default_stream_index(s);
1939 if(stream_index < 0)
1942 st= s->streams[stream_index];
1943 /* timestamp for default must be expressed in AV_TIME_BASE units */
1944 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1947 /* first, we try the format specific seek */
1948 AV_NOWARN_DEPRECATED(
1949 if (s->iformat->read_seek) {
1950 ff_read_frame_flush(s);
1951 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1959 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1960 ff_read_frame_flush(s);
1961 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1962 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1963 ff_read_frame_flush(s);
1964 return seek_frame_generic(s, stream_index, timestamp, flags);
1970 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1972 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1975 queue_attached_pictures(s);
1980 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1982 if(min_ts > ts || max_ts < ts)
1985 if (s->iformat->read_seek2) {
1987 ff_read_frame_flush(s);
1988 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1991 queue_attached_pictures(s);
1995 if(s->iformat->read_timestamp){
1996 //try to seek via read_timestamp()
1999 //Fallback to old API if new is not implemented but old is
2000 //Note the old has somewat different sematics
2001 AV_NOWARN_DEPRECATED(
2002 if (s->iformat->read_seek || 1) {
2003 int dir = (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0);
2004 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2005 if (ret<0 && ts != min_ts && max_ts != ts) {
2006 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2008 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2014 // try some generic seek like seek_frame_generic() but with new ts semantics
2017 /*******************************************************/
2020 * Return TRUE if the stream has accurate duration in any stream.
2022 * @return TRUE if the stream has accurate duration for at least one component.
2024 static int has_duration(AVFormatContext *ic)
2029 for(i = 0;i < ic->nb_streams; i++) {
2030 st = ic->streams[i];
2031 if (st->duration != AV_NOPTS_VALUE)
2034 if (ic->duration != AV_NOPTS_VALUE)
2040 * Estimate the stream timings from the one of each components.
2042 * Also computes the global bitrate if possible.
2044 static void update_stream_timings(AVFormatContext *ic)
2046 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2047 int64_t duration, duration1, filesize;
2051 start_time = INT64_MAX;
2052 start_time_text = INT64_MAX;
2053 end_time = INT64_MIN;
2054 duration = INT64_MIN;
2055 for(i = 0;i < ic->nb_streams; i++) {
2056 st = ic->streams[i];
2057 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2058 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2059 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2060 if (start_time1 < start_time_text)
2061 start_time_text = start_time1;
2063 start_time = FFMIN(start_time, start_time1);
2064 if (st->duration != AV_NOPTS_VALUE) {
2065 end_time1 = start_time1
2066 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2067 end_time = FFMAX(end_time, end_time1);
2070 if (st->duration != AV_NOPTS_VALUE) {
2071 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2072 duration = FFMAX(duration, duration1);
2075 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2076 start_time = start_time_text;
2077 else if(start_time > start_time_text)
2078 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2080 if (start_time != INT64_MAX) {
2081 ic->start_time = start_time;
2082 if (end_time != INT64_MIN)
2083 duration = FFMAX(duration, end_time - start_time);
2085 if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
2086 ic->duration = duration;
2088 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2089 /* compute the bitrate */
2090 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2091 (double)ic->duration;
2095 static void fill_all_stream_timings(AVFormatContext *ic)
2100 update_stream_timings(ic);
2101 for(i = 0;i < ic->nb_streams; i++) {
2102 st = ic->streams[i];
2103 if (st->start_time == AV_NOPTS_VALUE) {
2104 if(ic->start_time != AV_NOPTS_VALUE)
2105 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2106 if(ic->duration != AV_NOPTS_VALUE)
2107 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2112 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2114 int64_t filesize, duration;
2118 /* if bit_rate is already set, we believe it */
2119 if (ic->bit_rate <= 0) {
2121 for(i=0;i<ic->nb_streams;i++) {
2122 st = ic->streams[i];
2123 if (st->codec->bit_rate > 0)
2124 bit_rate += st->codec->bit_rate;
2126 ic->bit_rate = bit_rate;
2129 /* if duration is already set, we believe it */
2130 if (ic->duration == AV_NOPTS_VALUE &&
2131 ic->bit_rate != 0) {
2132 filesize = ic->pb ? avio_size(ic->pb) : 0;
2134 for(i = 0; i < ic->nb_streams; i++) {
2135 st = ic->streams[i];
2136 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2137 if (st->duration == AV_NOPTS_VALUE)
2138 st->duration = duration;
2144 #define DURATION_MAX_READ_SIZE 250000
2145 #define DURATION_MAX_RETRY 3
2147 /* only usable for MPEG-PS streams */
2148 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2150 AVPacket pkt1, *pkt = &pkt1;
2152 int read_size, i, ret;
2154 int64_t filesize, offset, duration;
2157 /* flush packet queue */
2158 flush_packet_queue(ic);
2160 for (i=0; i<ic->nb_streams; i++) {
2161 st = ic->streams[i];
2162 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2163 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2166 av_parser_close(st->parser);
2171 /* estimate the end time (duration) */
2172 /* XXX: may need to support wrapping */
2173 filesize = ic->pb ? avio_size(ic->pb) : 0;
2174 end_time = AV_NOPTS_VALUE;
2176 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2180 avio_seek(ic->pb, offset, SEEK_SET);
2183 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2187 ret = ff_read_packet(ic, pkt);
2188 } while(ret == AVERROR(EAGAIN));
2191 read_size += pkt->size;
2192 st = ic->streams[pkt->stream_index];
2193 if (pkt->pts != AV_NOPTS_VALUE &&
2194 (st->start_time != AV_NOPTS_VALUE ||
2195 st->first_dts != AV_NOPTS_VALUE)) {
2196 duration = end_time = pkt->pts;
2197 if (st->start_time != AV_NOPTS_VALUE)
2198 duration -= st->start_time;
2200 duration -= st->first_dts;
2202 duration += 1LL<<st->pts_wrap_bits;
2204 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2205 st->duration = duration;
2208 av_free_packet(pkt);
2210 }while( end_time==AV_NOPTS_VALUE
2211 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2212 && ++retry <= DURATION_MAX_RETRY);
2214 fill_all_stream_timings(ic);
2216 avio_seek(ic->pb, old_offset, SEEK_SET);
2217 for (i=0; i<ic->nb_streams; i++) {
2219 st->cur_dts= st->first_dts;
2220 st->last_IP_pts = AV_NOPTS_VALUE;
2221 st->reference_dts = AV_NOPTS_VALUE;
2225 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2229 /* get the file size, if possible */
2230 if (ic->iformat->flags & AVFMT_NOFILE) {
2233 file_size = avio_size(ic->pb);
2234 file_size = FFMAX(0, file_size);
2237 if ((!strcmp(ic->iformat->name, "mpeg") ||
2238 !strcmp(ic->iformat->name, "mpegts")) &&
2239 file_size && ic->pb->seekable) {
2240 /* get accurate estimate from the PTSes */
2241 estimate_timings_from_pts(ic, old_offset);
2242 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2243 } else if (has_duration(ic)) {
2244 /* at least one component has timings - we use them for all
2246 fill_all_stream_timings(ic);
2247 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2249 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2250 /* less precise: use bitrate info */
2251 estimate_timings_from_bit_rate(ic);
2252 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2254 update_stream_timings(ic);
2258 AVStream av_unused *st;
2259 for(i = 0;i < ic->nb_streams; i++) {
2260 st = ic->streams[i];
2261 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2262 (double) st->start_time / AV_TIME_BASE,
2263 (double) st->duration / AV_TIME_BASE);
2265 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2266 (double) ic->start_time / AV_TIME_BASE,
2267 (double) ic->duration / AV_TIME_BASE,
2268 ic->bit_rate / 1000);
2272 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2274 AVCodecContext *avctx = st->codec;
2276 #define FAIL(errmsg) do { \
2278 *errmsg_ptr = errmsg; \
2282 switch (avctx->codec_type) {
2283 case AVMEDIA_TYPE_AUDIO:
2284 if (!avctx->frame_size && determinable_frame_size(avctx))
2285 FAIL("unspecified sample size");
2286 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2287 FAIL("unspecified sample format");
2288 if (!avctx->sample_rate)
2289 FAIL("unspecified sample rate");
2290 if (!avctx->channels)
2291 FAIL("unspecified number of channels");
2293 case AVMEDIA_TYPE_VIDEO:
2295 FAIL("unspecified size");
2296 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2297 FAIL("unspecified pixel format");
2299 case AVMEDIA_TYPE_DATA:
2300 if(avctx->codec_id == CODEC_ID_NONE) return 1;
2303 if (avctx->codec_id == CODEC_ID_NONE)
2304 FAIL("unknown codec");
2308 static int has_decode_delay_been_guessed(AVStream *st)
2310 if(st->codec->codec_id != CODEC_ID_H264) return 1;
2311 #if CONFIG_H264_DECODER
2312 if(st->codec->has_b_frames &&
2313 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
2316 if(st->codec->has_b_frames<3)
2317 return st->info->nb_decoded_frames >= 6;
2318 else if(st->codec->has_b_frames<4)
2319 return st->info->nb_decoded_frames >= 18;
2321 return st->info->nb_decoded_frames >= 20;
2324 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2325 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2328 int got_picture = 1, ret = 0;
2330 AVPacket pkt = *avpkt;
2332 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2333 AVDictionary *thread_opt = NULL;
2335 codec = st->codec->codec ? st->codec->codec :
2336 avcodec_find_decoder(st->codec->codec_id);
2339 st->info->found_decoder = -1;
2343 /* force thread count to 1 since the h264 decoder will not extract SPS
2344 * and PPS to extradata during multi-threaded decoding */
2345 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2346 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2348 av_dict_free(&thread_opt);
2350 st->info->found_decoder = -1;
2353 st->info->found_decoder = 1;
2354 } else if (!st->info->found_decoder)
2355 st->info->found_decoder = 1;
2357 if (st->info->found_decoder < 0)
2360 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2362 (!has_codec_parameters(st, NULL) ||
2363 !has_decode_delay_been_guessed(st) ||
2364 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2366 avcodec_get_frame_defaults(&picture);
2367 switch(st->codec->codec_type) {
2368 case AVMEDIA_TYPE_VIDEO:
2369 ret = avcodec_decode_video2(st->codec, &picture,
2370 &got_picture, &pkt);
2372 case AVMEDIA_TYPE_AUDIO:
2373 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2380 st->info->nb_decoded_frames++;
2386 if(!pkt.data && !got_picture)
2391 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2393 while (tags->id != CODEC_ID_NONE) {
2401 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2404 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2405 if(tag == tags[i].tag)
2408 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2409 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2412 return CODEC_ID_NONE;
2415 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2418 for(i=0; tags && tags[i]; i++){
2419 int tag= ff_codec_get_tag(tags[i], id);
2425 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2428 for(i=0; tags && tags[i]; i++){
2429 enum CodecID id= ff_codec_get_id(tags[i], tag);
2430 if(id!=CODEC_ID_NONE) return id;
2432 return CODEC_ID_NONE;
2435 static void compute_chapters_end(AVFormatContext *s)
2438 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2440 for (i = 0; i < s->nb_chapters; i++)
2441 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2442 AVChapter *ch = s->chapters[i];
2443 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2446 for (j = 0; j < s->nb_chapters; j++) {
2447 AVChapter *ch1 = s->chapters[j];
2448 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2449 if (j != i && next_start > ch->start && next_start < end)
2452 ch->end = (end == INT64_MAX) ? ch->start : end;
2456 static int get_std_framerate(int i){
2457 if(i<60*12) return (i+1)*1001;
2458 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2462 * Is the time base unreliable.
2463 * This is a heuristic to balance between quick acceptance of the values in
2464 * the headers vs. some extra checks.
2465 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2466 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2467 * And there are "variable" fps files this needs to detect as well.
2469 static int tb_unreliable(AVCodecContext *c){
2470 if( c->time_base.den >= 101L*c->time_base.num
2471 || c->time_base.den < 5L*c->time_base.num
2472 /* || c->codec_tag == AV_RL32("DIVX")
2473 || c->codec_tag == AV_RL32("XVID")*/
2474 || c->codec_id == CODEC_ID_MPEG2VIDEO
2475 || c->codec_id == CODEC_ID_H264
2481 #if FF_API_FORMAT_PARAMETERS
2482 int av_find_stream_info(AVFormatContext *ic)
2484 return avformat_find_stream_info(ic, NULL);
2488 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2490 int i, count, ret, read_size, j;
2492 AVPacket pkt1, *pkt;
2493 int64_t old_offset = avio_tell(ic->pb);
2494 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2495 int flush_codecs = 1;
2498 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2500 for(i=0;i<ic->nb_streams;i++) {
2502 AVDictionary *thread_opt = NULL;
2503 st = ic->streams[i];
2505 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2506 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2507 /* if(!st->time_base.num)
2509 if(!st->codec->time_base.num)
2510 st->codec->time_base= st->time_base;
2512 //only for the split stuff
2513 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2514 st->parser = av_parser_init(st->codec->codec_id);
2516 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2517 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2518 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2519 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2521 } else if (st->need_parsing) {
2522 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2523 "%s, packets or times may be invalid.\n",
2524 avcodec_get_name(st->codec->codec_id));
2527 codec = st->codec->codec ? st->codec->codec :
2528 avcodec_find_decoder(st->codec->codec_id);
2530 /* force thread count to 1 since the h264 decoder will not extract SPS
2531 * and PPS to extradata during multi-threaded decoding */
2532 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2534 /* Ensure that subtitle_header is properly set. */
2535 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2536 && codec && !st->codec->codec)
2537 avcodec_open2(st->codec, codec, options ? &options[i]
2540 //try to just open decoders, in case this is enough to get parameters
2541 if (!has_codec_parameters(st, NULL)) {
2542 if (codec && !st->codec->codec)
2543 avcodec_open2(st->codec, codec, options ? &options[i]
2547 av_dict_free(&thread_opt);
2550 for (i=0; i<ic->nb_streams; i++) {
2551 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2557 if (ff_check_interrupt(&ic->interrupt_callback)){
2559 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2563 /* check if one codec still needs to be handled */
2564 for(i=0;i<ic->nb_streams;i++) {
2565 int fps_analyze_framecount = 20;
2567 st = ic->streams[i];
2568 if (!has_codec_parameters(st, NULL))
2570 /* if the timebase is coarse (like the usual millisecond precision
2571 of mkv), we need to analyze more frames to reliably arrive at
2573 if (av_q2d(st->time_base) > 0.0005)
2574 fps_analyze_framecount *= 2;
2575 if (ic->fps_probe_size >= 0)
2576 fps_analyze_framecount = ic->fps_probe_size;
2577 /* variable fps and no guess at the real fps */
2578 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2579 && st->info->duration_count < fps_analyze_framecount
2580 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2582 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2584 if (st->first_dts == AV_NOPTS_VALUE &&
2585 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2586 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2589 if (i == ic->nb_streams) {
2590 /* NOTE: if the format has no header, then we need to read
2591 some packets to get most of the streams, so we cannot
2593 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2594 /* if we found the info for all the codecs, we can stop */
2596 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2601 /* we did not get all the codec info, but we read too much data */
2602 if (read_size >= ic->probesize) {
2604 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2605 for (i = 0; i < ic->nb_streams; i++)
2606 if (!ic->streams[i]->r_frame_rate.num &&
2607 ic->streams[i]->info->duration_count <= 1)
2608 av_log(ic, AV_LOG_WARNING,
2609 "Stream #%d: not enough frames to estimate rate; "
2610 "consider increasing probesize\n", i);
2614 /* NOTE: a new stream can be added there if no header in file
2615 (AVFMTCTX_NOHEADER) */
2616 ret = read_frame_internal(ic, &pkt1);
2617 if (ret == AVERROR(EAGAIN))
2625 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2626 if ((ret = av_dup_packet(pkt)) < 0)
2627 goto find_stream_info_err;
2629 read_size += pkt->size;
2631 st = ic->streams[pkt->stream_index];
2632 if (st->codec_info_nb_frames>1) {
2634 if (st->time_base.den > 0)
2635 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2636 if (st->avg_frame_rate.num > 0)
2637 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));
2639 if (t >= ic->max_analyze_duration) {
2640 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2643 st->info->codec_info_duration += pkt->duration;
2646 int64_t last = st->info->last_dts;
2648 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2649 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2650 int64_t duration= pkt->dts - last;
2652 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2653 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2654 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2655 int framerate= get_std_framerate(i);
2656 double sdts= dts*framerate/(1001*12);
2658 int ticks= lrintf(sdts+j*0.5);
2659 double error= sdts - ticks + j*0.5;
2660 st->info->duration_error[j][0][i] += error;
2661 st->info->duration_error[j][1][i] += error*error;
2664 st->info->duration_count++;
2665 // ignore the first 4 values, they might have some random jitter
2666 if (st->info->duration_count > 3)
2667 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2669 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2670 st->info->last_dts = pkt->dts;
2672 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2673 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2674 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2675 st->codec->extradata_size= i;
2676 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2677 if (!st->codec->extradata)
2678 return AVERROR(ENOMEM);
2679 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2680 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2684 /* if still no information, we try to open the codec and to
2685 decompress the frame. We try to avoid that in most cases as
2686 it takes longer and uses more memory. For MPEG-4, we need to
2687 decompress for QuickTime.
2689 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2690 least one frame of codec data, this makes sure the codec initializes
2691 the channel configuration and does not only trust the values from the container.
2693 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2695 st->codec_info_nb_frames++;
2700 AVPacket empty_pkt = { 0 };
2702 av_init_packet(&empty_pkt);
2704 ret = -1; /* we could not have all the codec parameters before EOF */
2705 for(i=0;i<ic->nb_streams;i++) {
2708 st = ic->streams[i];
2710 /* flush the decoders */
2711 if (st->info->found_decoder == 1) {
2713 err = try_decode_frame(st, &empty_pkt,
2714 (options && i < orig_nb_streams) ?
2715 &options[i] : NULL);
2716 } while (err > 0 && !has_codec_parameters(st, NULL));
2719 av_log(ic, AV_LOG_INFO,
2720 "decoding for stream %d failed\n", st->index);
2724 if (!has_codec_parameters(st, &errmsg)) {
2726 avcodec_string(buf, sizeof(buf), st->codec, 0);
2727 av_log(ic, AV_LOG_WARNING,
2728 "Could not find codec parameters for stream %d (%s): %s\n"
2729 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2737 // close codecs which were opened in try_decode_frame()
2738 for(i=0;i<ic->nb_streams;i++) {
2739 st = ic->streams[i];
2740 avcodec_close(st->codec);
2742 for(i=0;i<ic->nb_streams;i++) {
2743 st = ic->streams[i];
2744 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2745 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2746 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2747 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2748 st->codec->codec_tag= tag;
2751 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2752 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2753 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2754 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2755 // the check for tb_unreliable() is not completely correct, since this is not about handling
2756 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2757 // ipmovie.c produces.
2758 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)
2759 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);
2760 if (st->info->duration_count && !st->r_frame_rate.num
2761 && tb_unreliable(st->codec) /*&&
2762 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2763 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2765 double best_error= 0.01;
2767 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2770 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2772 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2775 int n= st->info->duration_count;
2776 double a= st->info->duration_error[k][0][j] / n;
2777 double error= st->info->duration_error[k][1][j]/n - a*a;
2779 if(error < best_error && best_error> 0.000000001){
2781 num = get_std_framerate(j);
2784 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2787 // do not increase frame rate by more than 1 % in order to match a standard rate.
2788 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2789 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2792 if (!st->r_frame_rate.num){
2793 if( st->codec->time_base.den * (int64_t)st->time_base.num
2794 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2795 st->r_frame_rate.num = st->codec->time_base.den;
2796 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2798 st->r_frame_rate.num = st->time_base.den;
2799 st->r_frame_rate.den = st->time_base.num;
2802 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2803 if(!st->codec->bits_per_coded_sample)
2804 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2805 // set stream disposition based on audio service type
2806 switch (st->codec->audio_service_type) {
2807 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2808 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2809 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2810 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2811 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2812 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2813 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2814 st->disposition = AV_DISPOSITION_COMMENT; break;
2815 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2816 st->disposition = AV_DISPOSITION_KARAOKE; break;
2821 estimate_timings(ic, old_offset);
2823 compute_chapters_end(ic);
2825 find_stream_info_err:
2826 for (i=0; i < ic->nb_streams; i++) {
2827 if (ic->streams[i]->codec)
2828 ic->streams[i]->codec->thread_count = 0;
2829 av_freep(&ic->streams[i]->info);
2832 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2836 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2840 for (i = 0; i < ic->nb_programs; i++) {
2841 if (ic->programs[i] == last) {
2845 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2846 if (ic->programs[i]->stream_index[j] == s)
2847 return ic->programs[i];
2853 int av_find_best_stream(AVFormatContext *ic,
2854 enum AVMediaType type,
2855 int wanted_stream_nb,
2857 AVCodec **decoder_ret,
2860 int i, nb_streams = ic->nb_streams;
2861 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2862 unsigned *program = NULL;
2863 AVCodec *decoder = NULL, *best_decoder = NULL;
2865 if (related_stream >= 0 && wanted_stream_nb < 0) {
2866 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2868 program = p->stream_index;
2869 nb_streams = p->nb_stream_indexes;
2872 for (i = 0; i < nb_streams; i++) {
2873 int real_stream_index = program ? program[i] : i;
2874 AVStream *st = ic->streams[real_stream_index];
2875 AVCodecContext *avctx = st->codec;
2876 if (avctx->codec_type != type)
2878 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2880 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2883 decoder = avcodec_find_decoder(st->codec->codec_id);
2886 ret = AVERROR_DECODER_NOT_FOUND;
2890 if (best_count >= st->codec_info_nb_frames)
2892 best_count = st->codec_info_nb_frames;
2893 ret = real_stream_index;
2894 best_decoder = decoder;
2895 if (program && i == nb_streams - 1 && ret < 0) {
2897 nb_streams = ic->nb_streams;
2898 i = 0; /* no related stream found, try again with everything */
2902 *decoder_ret = best_decoder;
2906 /*******************************************************/
2908 int av_read_play(AVFormatContext *s)
2910 if (s->iformat->read_play)
2911 return s->iformat->read_play(s);
2913 return avio_pause(s->pb, 0);
2914 return AVERROR(ENOSYS);
2917 int av_read_pause(AVFormatContext *s)
2919 if (s->iformat->read_pause)
2920 return s->iformat->read_pause(s);
2922 return avio_pause(s->pb, 1);
2923 return AVERROR(ENOSYS);
2926 void avformat_free_context(AVFormatContext *s)
2932 if (s->iformat && s->iformat->priv_class && s->priv_data)
2933 av_opt_free(s->priv_data);
2935 for(i=0;i<s->nb_streams;i++) {
2936 /* free all data in a stream component */
2939 av_parser_close(st->parser);
2941 if (st->attached_pic.data)
2942 av_free_packet(&st->attached_pic);
2943 av_dict_free(&st->metadata);
2944 av_freep(&st->index_entries);
2945 av_freep(&st->codec->extradata);
2946 av_freep(&st->codec->subtitle_header);
2947 av_freep(&st->codec);
2948 av_freep(&st->priv_data);
2949 av_freep(&st->info);
2952 for(i=s->nb_programs-1; i>=0; i--) {
2953 av_dict_free(&s->programs[i]->metadata);
2954 av_freep(&s->programs[i]->stream_index);
2955 av_freep(&s->programs[i]);
2957 av_freep(&s->programs);
2958 av_freep(&s->priv_data);
2959 while(s->nb_chapters--) {
2960 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2961 av_freep(&s->chapters[s->nb_chapters]);
2963 av_freep(&s->chapters);
2964 av_dict_free(&s->metadata);
2965 av_freep(&s->streams);
2969 #if FF_API_CLOSE_INPUT_FILE
2970 void av_close_input_file(AVFormatContext *s)
2972 avformat_close_input(&s);
2976 void avformat_close_input(AVFormatContext **ps)
2978 AVFormatContext *s = *ps;
2979 AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2981 flush_packet_queue(s);
2982 if (s->iformat && (s->iformat->read_close))
2983 s->iformat->read_close(s);
2984 avformat_free_context(s);
2990 #if FF_API_NEW_STREAM
2991 AVStream *av_new_stream(AVFormatContext *s, int id)
2993 AVStream *st = avformat_new_stream(s, NULL);
3000 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
3006 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3008 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3011 s->streams = streams;
3013 st = av_mallocz(sizeof(AVStream));
3016 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3020 st->info->last_dts = AV_NOPTS_VALUE;
3022 st->codec = avcodec_alloc_context3(c);
3024 /* no default bitrate if decoding */
3025 st->codec->bit_rate = 0;
3027 st->index = s->nb_streams;
3028 st->start_time = AV_NOPTS_VALUE;
3029 st->duration = AV_NOPTS_VALUE;
3030 /* we set the current DTS to 0 so that formats without any timestamps
3031 but durations get some timestamps, formats with some unknown
3032 timestamps have their first few packets buffered and the
3033 timestamps corrected before they are returned to the user */
3034 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3035 st->first_dts = AV_NOPTS_VALUE;
3036 st->probe_packets = MAX_PROBE_PACKETS;
3038 /* default pts setting is MPEG-like */
3039 avpriv_set_pts_info(st, 33, 1, 90000);
3040 st->last_IP_pts = AV_NOPTS_VALUE;
3041 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3042 st->pts_buffer[i]= AV_NOPTS_VALUE;
3043 st->reference_dts = AV_NOPTS_VALUE;
3045 st->sample_aspect_ratio = (AVRational){0,1};
3047 s->streams[s->nb_streams++] = st;
3051 AVProgram *av_new_program(AVFormatContext *ac, int id)
3053 AVProgram *program=NULL;
3056 av_dlog(ac, "new_program: id=0x%04x\n", id);
3058 for(i=0; i<ac->nb_programs; i++)
3059 if(ac->programs[i]->id == id)
3060 program = ac->programs[i];
3063 program = av_mallocz(sizeof(AVProgram));
3066 dynarray_add(&ac->programs, &ac->nb_programs, program);
3067 program->discard = AVDISCARD_NONE;
3074 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3076 AVChapter *chapter = NULL;
3079 for(i=0; i<s->nb_chapters; i++)
3080 if(s->chapters[i]->id == id)
3081 chapter = s->chapters[i];
3084 chapter= av_mallocz(sizeof(AVChapter));
3087 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3089 av_dict_set(&chapter->metadata, "title", title, 0);
3091 chapter->time_base= time_base;
3092 chapter->start = start;
3098 /************************************************************/
3099 /* output media file */
3101 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
3102 const char *format, const char *filename)
3104 AVFormatContext *s = avformat_alloc_context();
3113 oformat = av_guess_format(format, NULL, NULL);
3115 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
3116 ret = AVERROR(EINVAL);
3120 oformat = av_guess_format(NULL, filename, NULL);
3122 ret = AVERROR(EINVAL);
3123 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
3130 s->oformat = oformat;
3131 if (s->oformat->priv_data_size > 0) {
3132 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3135 if (s->oformat->priv_class) {
3136 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3137 av_opt_set_defaults(s->priv_data);
3140 s->priv_data = NULL;
3143 av_strlcpy(s->filename, filename, sizeof(s->filename));
3147 av_log(s, AV_LOG_ERROR, "Out of memory\n");
3148 ret = AVERROR(ENOMEM);
3150 avformat_free_context(s);
3154 #if FF_API_ALLOC_OUTPUT_CONTEXT
3155 AVFormatContext *avformat_alloc_output_context(const char *format,
3156 AVOutputFormat *oformat, const char *filename)
3158 AVFormatContext *avctx;
3159 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
3160 return ret < 0 ? NULL : avctx;
3164 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
3166 const AVCodecTag *avctag;
3168 enum CodecID id = CODEC_ID_NONE;
3169 unsigned int tag = 0;
3172 * Check that tag + id is in the table
3173 * If neither is in the table -> OK
3174 * If tag is in the table with another id -> FAIL
3175 * If id is in the table with another tag -> FAIL unless strict < normal
3177 for (n = 0; s->oformat->codec_tag[n]; n++) {
3178 avctag = s->oformat->codec_tag[n];
3179 while (avctag->id != CODEC_ID_NONE) {
3180 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
3182 if (id == st->codec->codec_id)
3185 if (avctag->id == st->codec->codec_id)
3190 if (id != CODEC_ID_NONE)
3192 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
3197 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
3201 AVDictionary *tmp = NULL;
3204 av_dict_copy(&tmp, *options, 0);
3205 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
3207 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
3208 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3211 // some sanity checks
3212 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
3213 av_log(s, AV_LOG_ERROR, "no streams\n");
3214 ret = AVERROR(EINVAL);
3218 for(i=0;i<s->nb_streams;i++) {
3221 switch (st->codec->codec_type) {
3222 case AVMEDIA_TYPE_AUDIO:
3223 if(st->codec->sample_rate<=0){
3224 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
3225 ret = AVERROR(EINVAL);
3228 if(!st->codec->block_align)
3229 st->codec->block_align = st->codec->channels *
3230 av_get_bits_per_sample(st->codec->codec_id) >> 3;
3232 case AVMEDIA_TYPE_VIDEO:
3233 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
3234 av_log(s, AV_LOG_ERROR, "time base not set\n");
3235 ret = AVERROR(EINVAL);
3238 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
3239 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
3240 ret = AVERROR(EINVAL);
3243 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
3244 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
3246 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
3247 "(%d/%d) and encoder layer (%d/%d)\n",
3248 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3249 st->codec->sample_aspect_ratio.num,
3250 st->codec->sample_aspect_ratio.den);
3251 ret = AVERROR(EINVAL);
3257 if(s->oformat->codec_tag){
3258 if( st->codec->codec_tag
3259 && st->codec->codec_id == CODEC_ID_RAWVIDEO
3260 && (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', ' '))
3261 && !validate_codec_tag(s, st)){
3262 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi/mov, we override it here
3263 st->codec->codec_tag= 0;
3265 if(st->codec->codec_tag){
3266 if (!validate_codec_tag(s, st)) {
3267 char tagbuf[32], cortag[32];
3268 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3269 av_get_codec_tag_string(cortag, sizeof(cortag), av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id));
3270 av_log(s, AV_LOG_ERROR,
3271 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
3272 tagbuf, st->codec->codec_tag, st->codec->codec_id, cortag);
3273 ret = AVERROR_INVALIDDATA;
3277 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3280 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3281 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3282 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3285 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3286 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3287 if (!s->priv_data) {
3288 ret = AVERROR(ENOMEM);
3291 if (s->oformat->priv_class) {
3292 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3293 av_opt_set_defaults(s->priv_data);
3294 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3299 /* set muxer identification string */
3300 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3301 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3304 if(s->oformat->write_header){
3305 ret = s->oformat->write_header(s);
3310 /* init PTS generation */
3311 for(i=0;i<s->nb_streams;i++) {
3312 int64_t den = AV_NOPTS_VALUE;
3315 switch (st->codec->codec_type) {
3316 case AVMEDIA_TYPE_AUDIO:
3317 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3319 case AVMEDIA_TYPE_VIDEO:
3320 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3325 if (den != AV_NOPTS_VALUE) {
3327 ret = AVERROR_INVALIDDATA;
3330 frac_init(&st->pts, 0, 0, den);
3335 av_dict_free(options);
3344 //FIXME merge with compute_pkt_fields
3345 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3346 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3347 int num, den, frame_size, i;
3349 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
3350 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
3352 /* duration field */
3353 if (pkt->duration == 0) {
3354 compute_frame_duration(&num, &den, st, NULL, pkt);
3356 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3360 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3363 //XXX/FIXME this is a temporary hack until all encoders output pts
3364 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3367 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
3371 // pkt->pts= st->cur_dts;
3372 pkt->pts= st->pts.val;
3375 //calculate dts from pts
3376 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3377 st->pts_buffer[0]= pkt->pts;
3378 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3379 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3380 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3381 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3383 pkt->dts= st->pts_buffer[0];
3386 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
3387 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
3388 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
3389 av_log(s, AV_LOG_ERROR,
3390 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
3391 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
3392 return AVERROR(EINVAL);
3394 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3395 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
3396 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
3397 return AVERROR(EINVAL);
3400 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n", av_ts2str(pkt->pts), av_ts2str(pkt->dts));
3401 st->cur_dts= pkt->dts;
3402 st->pts.val= pkt->dts;
3405 switch (st->codec->codec_type) {
3406 case AVMEDIA_TYPE_AUDIO:
3407 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
3409 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3410 likely equal to the encoder delay, but it would be better if we
3411 had the real timestamps from the encoder */
3412 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3413 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3416 case AVMEDIA_TYPE_VIDEO:
3417 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3425 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3430 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3431 return s->oformat->write_packet(s, pkt);
3435 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3437 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3440 ret= s->oformat->write_packet(s, pkt);
3443 s->streams[pkt->stream_index]->nb_frames++;
3447 #define CHUNK_START 0x1000
3449 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3450 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3452 AVPacketList **next_point, *this_pktl;
3453 AVStream *st= s->streams[pkt->stream_index];
3454 int chunked= s->max_chunk_size || s->max_chunk_duration;
3456 this_pktl = av_mallocz(sizeof(AVPacketList));
3458 return AVERROR(ENOMEM);
3459 this_pktl->pkt= *pkt;
3460 pkt->destruct= NULL; // do not free original but only the copy
3461 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3463 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3464 next_point = &(st->last_in_packet_buffer->next);
3466 next_point = &s->packet_buffer;
3471 uint64_t max= av_rescale_q(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base);
3472 if( st->interleaver_chunk_size + pkt->size <= s->max_chunk_size-1U
3473 && st->interleaver_chunk_duration + pkt->duration <= max-1U){
3474 st->interleaver_chunk_size += pkt->size;
3475 st->interleaver_chunk_duration += pkt->duration;
3478 st->interleaver_chunk_size =
3479 st->interleaver_chunk_duration = 0;
3480 this_pktl->pkt.flags |= CHUNK_START;
3484 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3486 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
3487 || !compare(s, &(*next_point)->pkt, pkt))){
3488 next_point= &(*next_point)->next;
3493 next_point = &(s->packet_buffer_end->next);
3496 assert(!*next_point);
3498 s->packet_buffer_end= this_pktl;
3501 this_pktl->next= *next_point;
3503 s->streams[pkt->stream_index]->last_in_packet_buffer=
3504 *next_point= this_pktl;
3508 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3510 AVStream *st = s->streams[ pkt ->stream_index];
3511 AVStream *st2= s->streams[ next->stream_index];
3512 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3514 if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
3515 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);
3516 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);
3518 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
3519 -( 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;
3522 comp= (ts>ts2) - (ts<ts2);
3526 return pkt->stream_index < next->stream_index;
3530 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3531 AVPacket *pkt, int flush)
3534 int stream_count=0, noninterleaved_count=0;
3535 int64_t delta_dts_max = 0;
3539 ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3544 for(i=0; i < s->nb_streams; i++) {
3545 if (s->streams[i]->last_in_packet_buffer) {
3547 } else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3548 ++noninterleaved_count;
3552 if (s->nb_streams == stream_count) {
3555 for(i=0; i < s->nb_streams; i++) {
3556 if (s->streams[i]->last_in_packet_buffer) {
3558 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
3559 s->streams[i]->time_base,
3561 av_rescale_q(s->packet_buffer->pkt.dts,
3562 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
3564 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
3567 if(s->nb_streams == stream_count+noninterleaved_count &&
3568 delta_dts_max > 20*AV_TIME_BASE) {
3569 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
3573 if(stream_count && flush){
3574 pktl= s->packet_buffer;
3577 s->packet_buffer= pktl->next;
3578 if(!s->packet_buffer)
3579 s->packet_buffer_end= NULL;
3581 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3582 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3586 av_init_packet(out);
3591 #if FF_API_INTERLEAVE_PACKET
3592 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3593 AVPacket *pkt, int flush)
3595 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3600 * Interleave an AVPacket correctly so it can be muxed.
3601 * @param out the interleaved packet will be output here
3602 * @param in the input packet
3603 * @param flush 1 if no further packets are available as input and all
3604 * remaining packets should be output
3605 * @return 1 if a packet was output, 0 if no packet could be output,
3606 * < 0 if an error occurred
3608 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3609 if (s->oformat->interleave_packet) {
3610 int ret = s->oformat->interleave_packet(s, out, in, flush);
3615 return ff_interleave_packet_per_dts(s, out, in, flush);
3618 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3622 AVStream *st= s->streams[ pkt->stream_index];
3624 //FIXME/XXX/HACK drop zero sized packets
3625 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3628 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
3629 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
3630 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3633 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3634 return AVERROR(EINVAL);
3636 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3642 int ret= interleave_packet(s, &opkt, pkt, flush);
3643 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3646 ret= s->oformat->write_packet(s, &opkt);
3648 s->streams[opkt.stream_index]->nb_frames++;
3650 av_free_packet(&opkt);
3655 if(s->pb && s->pb->error)
3656 return s->pb->error;
3660 int av_write_trailer(AVFormatContext *s)
3666 ret= interleave_packet(s, &pkt, NULL, 1);
3667 if(ret<0) //FIXME cleanup needed for ret<0 ?
3672 ret= s->oformat->write_packet(s, &pkt);
3674 s->streams[pkt.stream_index]->nb_frames++;
3676 av_free_packet(&pkt);
3680 if(s->pb && s->pb->error)
3684 if(s->oformat->write_trailer)
3685 ret = s->oformat->write_trailer(s);
3690 ret = s->pb ? s->pb->error : 0;
3691 for(i=0;i<s->nb_streams;i++) {
3692 av_freep(&s->streams[i]->priv_data);
3693 av_freep(&s->streams[i]->index_entries);
3695 if (s->oformat->priv_class)
3696 av_opt_free(s->priv_data);
3697 av_freep(&s->priv_data);
3701 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3702 int64_t *dts, int64_t *wall)
3704 if (!s->oformat || !s->oformat->get_output_timestamp)
3705 return AVERROR(ENOSYS);
3706 s->oformat->get_output_timestamp(s, stream, dts, wall);
3710 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3713 AVProgram *program=NULL;
3716 if (idx >= ac->nb_streams) {
3717 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3721 for(i=0; i<ac->nb_programs; i++){
3722 if(ac->programs[i]->id != progid)
3724 program = ac->programs[i];
3725 for(j=0; j<program->nb_stream_indexes; j++)
3726 if(program->stream_index[j] == idx)
3729 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3732 program->stream_index = tmp;
3733 program->stream_index[program->nb_stream_indexes++] = idx;
3738 static void print_fps(double d, const char *postfix){
3739 uint64_t v= lrintf(d*100);
3740 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3741 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3742 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3745 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3747 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3748 AVDictionaryEntry *tag=NULL;
3750 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3751 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3752 if(strcmp("language", tag->key)){
3753 const char *p = tag->value;
3754 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3757 size_t len = strcspn(p, "\xd\xa");
3758 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3759 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3761 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3762 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3765 av_log(ctx, AV_LOG_INFO, "\n");
3771 /* "user interface" functions */
3772 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3775 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3776 AVStream *st = ic->streams[i];
3777 int g = av_gcd(st->time_base.num, st->time_base.den);
3778 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3779 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3780 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3781 /* the pid is an important information, so we display it */
3782 /* XXX: add a generic system */
3783 if (flags & AVFMT_SHOW_IDS)
3784 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3786 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3787 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3788 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3789 if (st->sample_aspect_ratio.num && // default
3790 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3791 AVRational display_aspect_ratio;
3792 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3793 st->codec->width*st->sample_aspect_ratio.num,
3794 st->codec->height*st->sample_aspect_ratio.den,
3796 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3797 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3798 display_aspect_ratio.num, display_aspect_ratio.den);
3800 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3801 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3802 print_fps(av_q2d(st->avg_frame_rate), "fps");
3803 if(st->r_frame_rate.den && st->r_frame_rate.num)
3804 print_fps(av_q2d(st->r_frame_rate), "tbr");
3805 if(st->time_base.den && st->time_base.num)
3806 print_fps(1/av_q2d(st->time_base), "tbn");
3807 if(st->codec->time_base.den && st->codec->time_base.num)
3808 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3810 if (st->disposition & AV_DISPOSITION_DEFAULT)
3811 av_log(NULL, AV_LOG_INFO, " (default)");
3812 if (st->disposition & AV_DISPOSITION_DUB)
3813 av_log(NULL, AV_LOG_INFO, " (dub)");
3814 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3815 av_log(NULL, AV_LOG_INFO, " (original)");
3816 if (st->disposition & AV_DISPOSITION_COMMENT)
3817 av_log(NULL, AV_LOG_INFO, " (comment)");
3818 if (st->disposition & AV_DISPOSITION_LYRICS)
3819 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3820 if (st->disposition & AV_DISPOSITION_KARAOKE)
3821 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3822 if (st->disposition & AV_DISPOSITION_FORCED)
3823 av_log(NULL, AV_LOG_INFO, " (forced)");
3824 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3825 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3826 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3827 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3828 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3829 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3830 av_log(NULL, AV_LOG_INFO, "\n");
3831 dump_metadata(NULL, st->metadata, " ");
3834 void av_dump_format(AVFormatContext *ic,
3840 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3841 if (ic->nb_streams && !printed)
3844 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3845 is_output ? "Output" : "Input",
3847 is_output ? ic->oformat->name : ic->iformat->name,
3848 is_output ? "to" : "from", url);
3849 dump_metadata(NULL, ic->metadata, " ");
3851 av_log(NULL, AV_LOG_INFO, " Duration: ");
3852 if (ic->duration != AV_NOPTS_VALUE) {
3853 int hours, mins, secs, us;
3854 secs = ic->duration / AV_TIME_BASE;
3855 us = ic->duration % AV_TIME_BASE;
3860 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3861 (100 * us) / AV_TIME_BASE);
3863 av_log(NULL, AV_LOG_INFO, "N/A");
3865 if (ic->start_time != AV_NOPTS_VALUE) {
3867 av_log(NULL, AV_LOG_INFO, ", start: ");
3868 secs = ic->start_time / AV_TIME_BASE;
3869 us = abs(ic->start_time % AV_TIME_BASE);
3870 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3871 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3873 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3875 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3877 av_log(NULL, AV_LOG_INFO, "N/A");
3879 av_log(NULL, AV_LOG_INFO, "\n");
3881 for (i = 0; i < ic->nb_chapters; i++) {
3882 AVChapter *ch = ic->chapters[i];
3883 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3884 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3885 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3887 dump_metadata(NULL, ch->metadata, " ");
3889 if(ic->nb_programs) {
3890 int j, k, total = 0;
3891 for(j=0; j<ic->nb_programs; j++) {
3892 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3894 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3895 name ? name->value : "");
3896 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3897 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3898 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3899 printed[ic->programs[j]->stream_index[k]] = 1;
3901 total += ic->programs[j]->nb_stream_indexes;
3903 if (total < ic->nb_streams)
3904 av_log(NULL, AV_LOG_INFO, " No Program\n");
3906 for(i=0;i<ic->nb_streams;i++)
3908 dump_stream_format(ic, i, index, is_output);
3913 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3914 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3916 return av_gettime();
3920 uint64_t ff_ntp_time(void)
3922 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3925 int av_get_frame_filename(char *buf, int buf_size,
3926 const char *path, int number)
3929 char *q, buf1[20], c;
3930 int nd, len, percentd_found;
3942 while (isdigit(*p)) {
3943 nd = nd * 10 + *p++ - '0';
3946 } while (isdigit(c));
3955 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3957 if ((q - buf + len) > buf_size - 1)
3959 memcpy(q, buf1, len);
3967 if ((q - buf) < buf_size - 1)
3971 if (!percentd_found)
3980 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3984 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3986 for(i=0;i<size;i+=16) {
3993 PRINT(" %02x", buf[i+j]);
3998 for(j=0;j<len;j++) {
4000 if (c < ' ' || c > '~')
4009 void av_hex_dump(FILE *f, uint8_t *buf, int size)
4011 hex_dump_internal(NULL, f, 0, buf, size);
4014 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
4016 hex_dump_internal(avcl, NULL, level, buf, size);
4019 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
4022 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
4023 PRINT("stream #%d:\n", pkt->stream_index);
4024 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
4025 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4026 /* DTS is _always_ valid after av_read_frame() */
4028 if (pkt->dts == AV_NOPTS_VALUE)
4031 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4032 /* PTS may not be known if B-frames are present. */
4034 if (pkt->pts == AV_NOPTS_VALUE)
4037 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4039 PRINT(" size=%d\n", pkt->size);
4042 av_hex_dump(f, pkt->data, pkt->size);
4046 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
4048 AVRational tb = { 1, AV_TIME_BASE };
4049 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
4053 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
4055 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4059 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
4061 AVRational tb = { 1, AV_TIME_BASE };
4062 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
4066 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
4069 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4072 void av_url_split(char *proto, int proto_size,
4073 char *authorization, int authorization_size,
4074 char *hostname, int hostname_size,
4076 char *path, int path_size,
4079 const char *p, *ls, *at, *col, *brk;
4081 if (port_ptr) *port_ptr = -1;
4082 if (proto_size > 0) proto[0] = 0;
4083 if (authorization_size > 0) authorization[0] = 0;
4084 if (hostname_size > 0) hostname[0] = 0;
4085 if (path_size > 0) path[0] = 0;
4087 /* parse protocol */
4088 if ((p = strchr(url, ':'))) {
4089 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4094 /* no protocol means plain filename */
4095 av_strlcpy(path, url, path_size);
4099 /* separate path from hostname */
4100 ls = strchr(p, '/');
4102 ls = strchr(p, '?');
4104 av_strlcpy(path, ls, path_size);
4106 ls = &p[strlen(p)]; // XXX
4108 /* the rest is hostname, use that to parse auth/port */
4110 /* authorization (user[:pass]@hostname) */
4111 if ((at = strchr(p, '@')) && at < ls) {
4112 av_strlcpy(authorization, p,
4113 FFMIN(authorization_size, at + 1 - p));
4114 p = at + 1; /* skip '@' */
4117 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4119 av_strlcpy(hostname, p + 1,
4120 FFMIN(hostname_size, brk - p));
4121 if (brk[1] == ':' && port_ptr)
4122 *port_ptr = atoi(brk + 2);
4123 } else if ((col = strchr(p, ':')) && col < ls) {
4124 av_strlcpy(hostname, p,
4125 FFMIN(col + 1 - p, hostname_size));
4126 if (port_ptr) *port_ptr = atoi(col + 1);
4128 av_strlcpy(hostname, p,
4129 FFMIN(ls + 1 - p, hostname_size));
4133 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4136 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4139 'C', 'D', 'E', 'F' };
4140 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4143 'c', 'd', 'e', 'f' };
4144 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4146 for(i = 0; i < s; i++) {
4147 buff[i * 2] = hex_table[src[i] >> 4];
4148 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4154 int ff_hex_to_data(uint8_t *data, const char *p)
4161 p += strspn(p, SPACE_CHARS);
4164 c = toupper((unsigned char) *p++);
4165 if (c >= '0' && c <= '9')
4167 else if (c >= 'A' && c <= 'F')
4182 #if FF_API_SET_PTS_INFO
4183 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4184 unsigned int pts_num, unsigned int pts_den)
4186 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4190 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4191 unsigned int pts_num, unsigned int pts_den)
4194 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
4195 if(new_tb.num != pts_num)
4196 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
4198 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
4200 if(new_tb.num <= 0 || new_tb.den <= 0) {
4201 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);
4204 s->time_base = new_tb;
4205 av_codec_set_pkt_timebase(s->codec, new_tb);
4206 s->pts_wrap_bits = pts_wrap_bits;
4209 int ff_url_join(char *str, int size, const char *proto,
4210 const char *authorization, const char *hostname,
4211 int port, const char *fmt, ...)
4214 struct addrinfo hints = { 0 }, *ai;
4219 av_strlcatf(str, size, "%s://", proto);
4220 if (authorization && authorization[0])
4221 av_strlcatf(str, size, "%s@", authorization);
4222 #if CONFIG_NETWORK && defined(AF_INET6)
4223 /* Determine if hostname is a numerical IPv6 address,
4224 * properly escape it within [] in that case. */
4225 hints.ai_flags = AI_NUMERICHOST;
4226 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
4227 if (ai->ai_family == AF_INET6) {
4228 av_strlcat(str, "[", size);
4229 av_strlcat(str, hostname, size);
4230 av_strlcat(str, "]", size);
4232 av_strlcat(str, hostname, size);
4237 /* Not an IPv6 address, just output the plain string. */
4238 av_strlcat(str, hostname, size);
4241 av_strlcatf(str, size, ":%d", port);
4244 int len = strlen(str);
4247 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
4253 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
4254 AVFormatContext *src)
4259 local_pkt.stream_index = dst_stream;
4260 if (pkt->pts != AV_NOPTS_VALUE)
4261 local_pkt.pts = av_rescale_q(pkt->pts,
4262 src->streams[pkt->stream_index]->time_base,
4263 dst->streams[dst_stream]->time_base);
4264 if (pkt->dts != AV_NOPTS_VALUE)
4265 local_pkt.dts = av_rescale_q(pkt->dts,
4266 src->streams[pkt->stream_index]->time_base,
4267 dst->streams[dst_stream]->time_base);
4268 return av_write_frame(dst, &local_pkt);
4271 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4274 const char *ptr = str;
4276 /* Parse key=value pairs. */
4279 char *dest = NULL, *dest_end;
4280 int key_len, dest_len = 0;
4282 /* Skip whitespace and potential commas. */
4283 while (*ptr && (isspace(*ptr) || *ptr == ','))
4290 if (!(ptr = strchr(key, '=')))
4293 key_len = ptr - key;
4295 callback_get_buf(context, key, key_len, &dest, &dest_len);
4296 dest_end = dest + dest_len - 1;
4300 while (*ptr && *ptr != '\"') {
4304 if (dest && dest < dest_end)
4308 if (dest && dest < dest_end)
4316 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
4317 if (dest && dest < dest_end)
4325 int ff_find_stream_index(AVFormatContext *s, int id)
4328 for (i = 0; i < s->nb_streams; i++) {
4329 if (s->streams[i]->id == id)
4335 void ff_make_absolute_url(char *buf, int size, const char *base,
4339 /* Absolute path, relative to the current server */
4340 if (base && strstr(base, "://") && rel[0] == '/') {
4342 av_strlcpy(buf, base, size);
4343 sep = strstr(buf, "://");
4346 sep = strchr(sep, '/');
4350 av_strlcat(buf, rel, size);
4353 /* If rel actually is an absolute url, just copy it */
4354 if (!base || strstr(rel, "://") || rel[0] == '/') {
4355 av_strlcpy(buf, rel, size);
4359 av_strlcpy(buf, base, size);
4360 /* Remove the file name from the base url */
4361 sep = strrchr(buf, '/');
4366 while (av_strstart(rel, "../", NULL) && sep) {
4367 /* Remove the path delimiter at the end */
4369 sep = strrchr(buf, '/');
4370 /* If the next directory name to pop off is "..", break here */
4371 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4372 /* Readd the slash we just removed */
4373 av_strlcat(buf, "/", size);
4376 /* Cut off the directory name */
4383 av_strlcat(buf, rel, size);
4386 int64_t ff_iso8601_to_unix_time(const char *datestr)
4389 struct tm time1 = {0}, time2 = {0};
4391 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
4392 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
4394 return av_timegm(&time2);
4396 return av_timegm(&time1);
4398 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4399 "the date string.\n");
4404 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
4407 if (ofmt->query_codec)
4408 return ofmt->query_codec(codec_id, std_compliance);
4409 else if (ofmt->codec_tag)
4410 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4411 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4412 codec_id == ofmt->subtitle_codec)
4415 return AVERROR_PATCHWELCOME;
4418 int avformat_network_init(void)
4422 ff_network_inited_globally = 1;
4423 if ((ret = ff_network_init()) < 0)
4430 int avformat_network_deinit(void)
4439 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4440 uint64_t channel_layout, int32_t sample_rate,
4441 int32_t width, int32_t height)
4447 return AVERROR(EINVAL);
4450 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4452 if (channel_layout) {
4454 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4458 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4460 if (width || height) {
4462 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4464 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4466 return AVERROR(ENOMEM);
4467 bytestream_put_le32(&data, flags);
4469 bytestream_put_le32(&data, channels);
4471 bytestream_put_le64(&data, channel_layout);
4473 bytestream_put_le32(&data, sample_rate);
4474 if (width || height) {
4475 bytestream_put_le32(&data, width);
4476 bytestream_put_le32(&data, height);
4481 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4483 return ff_codec_bmp_tags;
4485 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4487 return ff_codec_wav_tags;
4490 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4492 AVRational undef = {0, 1};
4493 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4494 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4495 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4497 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4498 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4499 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4500 stream_sample_aspect_ratio = undef;
4502 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4503 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4504 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4505 frame_sample_aspect_ratio = undef;
4507 if (stream_sample_aspect_ratio.num)
4508 return stream_sample_aspect_ratio;
4510 return frame_sample_aspect_ratio;