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/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /* fraction handling */
84 * f = val + (num / den) + 0.5.
86 * 'num' is normalized so that it is such as 0 <= num < den.
88 * @param f fractional number
89 * @param val integer value
90 * @param num must be >= 0
91 * @param den must be >= 1
93 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
106 * Fractional addition to f: f = f + (incr / f->den).
108 * @param f fractional number
109 * @param incr increment, can be positive or negative
111 static void frac_add(AVFrac *f, int64_t incr)
124 } else if (num >= den) {
131 /** head of registered input format linked list */
132 static AVInputFormat *first_iformat = NULL;
133 /** head of registered output format linked list */
134 static AVOutputFormat *first_oformat = NULL;
136 AVInputFormat *av_iformat_next(AVInputFormat *f)
138 if(f) return f->next;
139 else return first_iformat;
142 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
144 if(f) return f->next;
145 else return first_oformat;
148 void av_register_input_format(AVInputFormat *format)
152 while (*p != NULL) p = &(*p)->next;
157 void av_register_output_format(AVOutputFormat *format)
161 while (*p != NULL) p = &(*p)->next;
166 int av_match_ext(const char *filename, const char *extensions)
174 ext = strrchr(filename, '.');
180 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
183 if (!av_strcasecmp(ext1, ext))
193 static int match_format(const char *name, const char *names)
201 namelen = strlen(name);
202 while ((p = strchr(names, ','))) {
203 len = FFMAX(p - names, namelen);
204 if (!av_strncasecmp(name, names, len))
208 return !av_strcasecmp(name, names);
211 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
212 const char *mime_type)
214 AVOutputFormat *fmt = NULL, *fmt_found;
215 int score_max, score;
217 /* specific test for image sequences */
218 #if CONFIG_IMAGE2_MUXER
219 if (!short_name && filename &&
220 av_filename_number_test(filename) &&
221 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
222 return av_guess_format("image2", NULL, NULL);
225 /* Find the proper file type. */
228 while ((fmt = av_oformat_next(fmt))) {
230 if (fmt->name && short_name && match_format(short_name, fmt->name))
232 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
234 if (filename && fmt->extensions &&
235 av_match_ext(filename, fmt->extensions)) {
238 if (score > score_max) {
246 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
247 const char *filename, const char *mime_type, enum AVMediaType type){
248 if(type == AVMEDIA_TYPE_VIDEO){
249 enum CodecID codec_id= CODEC_ID_NONE;
251 #if CONFIG_IMAGE2_MUXER
252 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
253 codec_id= ff_guess_image2_codec(filename);
256 if(codec_id == CODEC_ID_NONE)
257 codec_id= fmt->video_codec;
259 }else if(type == AVMEDIA_TYPE_AUDIO)
260 return fmt->audio_codec;
261 else if (type == AVMEDIA_TYPE_SUBTITLE)
262 return fmt->subtitle_codec;
264 return CODEC_ID_NONE;
267 AVInputFormat *av_find_input_format(const char *short_name)
269 AVInputFormat *fmt = NULL;
270 while ((fmt = av_iformat_next(fmt))) {
271 if (match_format(short_name, fmt->name))
277 int ffio_limit(AVIOContext *s, int size)
280 int64_t remaining= s->maxsize - avio_tell(s);
281 if(remaining < size){
282 int64_t newsize= avio_size(s);
283 if(!s->maxsize || s->maxsize<newsize)
284 s->maxsize= newsize - !newsize;
285 remaining= s->maxsize - avio_tell(s);
286 remaining= FFMAX(remaining, 0);
289 if(s->maxsize>=0 && remaining+1 < size){
290 av_log(0, AV_LOG_ERROR, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
297 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
300 int orig_size = size;
301 size= ffio_limit(s, size);
303 ret= av_new_packet(pkt, size);
308 pkt->pos= avio_tell(s);
310 ret= avio_read(s, pkt->data, size);
314 av_shrink_packet(pkt, ret);
315 if (pkt->size < orig_size)
316 pkt->flags |= AV_PKT_FLAG_CORRUPT;
321 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
326 return av_get_packet(s, pkt, size);
327 old_size = pkt->size;
328 ret = av_grow_packet(pkt, size);
331 ret = avio_read(s, pkt->data + old_size, size);
332 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
337 int av_filename_number_test(const char *filename)
340 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
343 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
345 AVProbeData lpd = *pd;
346 AVInputFormat *fmt1 = NULL, *fmt;
347 int score, nodat = 0, score_max=0;
349 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
350 int id3len = ff_id3v2_tag_len(lpd.buf);
351 if (lpd.buf_size > id3len + 16) {
353 lpd.buf_size -= id3len;
359 while ((fmt1 = av_iformat_next(fmt1))) {
360 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
363 if (fmt1->read_probe) {
364 score = fmt1->read_probe(&lpd);
365 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
366 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
367 } else if (fmt1->extensions) {
368 if (av_match_ext(lpd.filename, fmt1->extensions)) {
372 if (score > score_max) {
375 }else if (score == score_max)
378 *score_ret= score_max;
383 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
386 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
387 if(score_ret > *score_max){
388 *score_max= score_ret;
394 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
396 return av_probe_input_format2(pd, is_opened, &score);
399 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
401 static const struct {
402 const char *name; enum CodecID id; enum AVMediaType type;
404 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
405 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
406 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
407 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
408 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
409 { "loas" , CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
410 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
411 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
412 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
416 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
420 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
421 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
422 for (i = 0; fmt_id_type[i].name; i++) {
423 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
424 st->codec->codec_id = fmt_id_type[i].id;
425 st->codec->codec_type = fmt_id_type[i].type;
433 /************************************************************/
434 /* input media file */
436 int av_demuxer_open(AVFormatContext *ic){
439 if (ic->iformat->read_header) {
440 err = ic->iformat->read_header(ic);
445 if (ic->pb && !ic->data_offset)
446 ic->data_offset = avio_tell(ic->pb);
452 /** size of probe buffer, for guessing file type from file contents */
453 #define PROBE_BUF_MIN 2048
454 #define PROBE_BUF_MAX (1<<20)
456 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
457 const char *filename, void *logctx,
458 unsigned int offset, unsigned int max_probe_size)
460 AVProbeData pd = { filename ? filename : "", NULL, -offset };
461 unsigned char *buf = NULL;
462 int ret = 0, probe_size;
464 if (!max_probe_size) {
465 max_probe_size = PROBE_BUF_MAX;
466 } else if (max_probe_size > PROBE_BUF_MAX) {
467 max_probe_size = PROBE_BUF_MAX;
468 } else if (max_probe_size < PROBE_BUF_MIN) {
469 return AVERROR(EINVAL);
472 if (offset >= max_probe_size) {
473 return AVERROR(EINVAL);
476 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
477 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
478 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
479 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
482 if (probe_size < offset) {
486 /* read probe data */
487 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
490 return AVERROR(ENOMEM);
493 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
494 /* fail if error was not end of file, otherwise, lower score */
495 if (ret != AVERROR_EOF) {
500 ret = 0; /* error was end of file, nothing read */
503 pd.buf = &buf[offset];
505 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
507 /* guess file format */
508 *fmt = av_probe_input_format2(&pd, 1, &score);
510 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
511 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
513 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
519 return AVERROR_INVALIDDATA;
522 /* rewind. reuse probe buffer to avoid seeking */
523 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
529 /* open input file and probe the format if necessary */
530 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
533 AVProbeData pd = {filename, NULL, 0};
536 s->flags |= AVFMT_FLAG_CUSTOM_IO;
538 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
539 else if (s->iformat->flags & AVFMT_NOFILE)
540 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
541 "will be ignored with AVFMT_NOFILE format.\n");
545 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
546 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
549 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
550 &s->interrupt_callback, options)) < 0)
554 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
557 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
558 AVPacketList **plast_pktl){
559 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
564 (*plast_pktl)->next = pktl;
566 *packet_buffer = pktl;
568 /* add the packet in the buffered packet list */
574 static void queue_attached_pictures(AVFormatContext *s)
577 for (i = 0; i < s->nb_streams; i++)
578 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
579 s->streams[i]->discard < AVDISCARD_ALL) {
580 AVPacket copy = s->streams[i]->attached_pic;
581 copy.destruct = NULL;
582 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
586 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
588 AVFormatContext *s = *ps;
590 AVDictionary *tmp = NULL;
591 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
593 if (!s && !(s = avformat_alloc_context()))
594 return AVERROR(ENOMEM);
596 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
597 return AVERROR(EINVAL);
603 av_dict_copy(&tmp, *options, 0);
605 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
608 if ((ret = init_input(s, filename, &tmp)) < 0)
611 /* check filename in case an image number is expected */
612 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
613 if (!av_filename_number_test(filename)) {
614 ret = AVERROR(EINVAL);
619 s->duration = s->start_time = AV_NOPTS_VALUE;
620 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
622 /* allocate private data */
623 if (s->iformat->priv_data_size > 0) {
624 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
625 ret = AVERROR(ENOMEM);
628 if (s->iformat->priv_class) {
629 *(const AVClass**)s->priv_data = s->iformat->priv_class;
630 av_opt_set_defaults(s->priv_data);
631 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
636 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
638 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
640 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
641 if ((ret = s->iformat->read_header(s)) < 0)
644 if (id3v2_extra_meta &&
645 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
647 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
649 queue_attached_pictures(s);
651 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
652 s->data_offset = avio_tell(s->pb);
654 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
657 av_dict_free(options);
664 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
666 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
668 avformat_free_context(s);
673 /*******************************************************/
675 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
677 if(st->request_probe>0){
678 AVProbeData *pd = &st->probe_data;
680 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
684 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
688 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
689 pd->buf_size += pkt->size;
690 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
693 st->probe_packets = 0;
696 end= s->raw_packet_buffer_remaining_size <= 0
697 || st->probe_packets<=0;
699 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
700 int score= set_codec_from_probe_data(s, st, pd);
701 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
705 st->request_probe= -1;
706 if(st->codec->codec_id != CODEC_ID_NONE){
707 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
709 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
715 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
721 AVPacketList *pktl = s->raw_packet_buffer;
725 st = s->streams[pkt->stream_index];
726 if(st->request_probe <= 0){
727 s->raw_packet_buffer = pktl->next;
728 s->raw_packet_buffer_remaining_size += pkt->size;
735 ret= s->iformat->read_packet(s, pkt);
737 if (!pktl || ret == AVERROR(EAGAIN))
739 for (i = 0; i < s->nb_streams; i++) {
741 if (st->probe_packets) {
742 probe_codec(s, st, NULL);
744 av_assert0(st->request_probe <= 0);
749 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
750 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
751 av_log(s, AV_LOG_WARNING,
752 "Dropped corrupted packet (stream = %d)\n",
758 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
759 av_packet_merge_side_data(pkt);
761 if(pkt->stream_index >= (unsigned)s->nb_streams){
762 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
766 st= s->streams[pkt->stream_index];
768 switch(st->codec->codec_type){
769 case AVMEDIA_TYPE_VIDEO:
770 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
772 case AVMEDIA_TYPE_AUDIO:
773 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
775 case AVMEDIA_TYPE_SUBTITLE:
776 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
780 if(!pktl && st->request_probe <= 0)
783 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
784 s->raw_packet_buffer_remaining_size -= pkt->size;
786 probe_codec(s, st, pkt);
790 #if FF_API_READ_PACKET
791 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
793 return ff_read_packet(s, pkt);
798 /**********************************************************/
800 static int determinable_frame_size(AVCodecContext *avctx)
802 if (/*avctx->codec_id == CODEC_ID_AAC ||*/
803 avctx->codec_id == CODEC_ID_MP1 ||
804 avctx->codec_id == CODEC_ID_MP2 ||
805 avctx->codec_id == CODEC_ID_MP3/* ||
806 avctx->codec_id == CODEC_ID_CELT*/)
812 * Get the number of samples of an audio frame. Return -1 on error.
814 static int get_audio_frame_size(AVCodecContext *enc, int size, int mux)
818 /* give frame_size priority if demuxing */
819 if (!mux && enc->frame_size > 1)
820 return enc->frame_size;
822 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
825 /* fallback to using frame_size if muxing */
826 if (enc->frame_size > 1)
827 return enc->frame_size;
834 * Return the frame duration in seconds. Return 0 if not available.
836 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
837 AVCodecParserContext *pc, AVPacket *pkt)
843 switch(st->codec->codec_type) {
844 case AVMEDIA_TYPE_VIDEO:
845 if (st->r_frame_rate.num && !pc) {
846 *pnum = st->r_frame_rate.den;
847 *pden = st->r_frame_rate.num;
848 } else if(st->time_base.num*1000LL > st->time_base.den) {
849 *pnum = st->time_base.num;
850 *pden = st->time_base.den;
851 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
852 *pnum = st->codec->time_base.num;
853 *pden = st->codec->time_base.den;
854 if (pc && pc->repeat_pict) {
855 *pnum = (*pnum) * (1 + pc->repeat_pict);
857 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
858 //Thus if we have no parser in such case leave duration undefined.
859 if(st->codec->ticks_per_frame>1 && !pc){
864 case AVMEDIA_TYPE_AUDIO:
865 frame_size = get_audio_frame_size(st->codec, pkt->size, 0);
866 if (frame_size <= 0 || st->codec->sample_rate <= 0)
869 *pden = st->codec->sample_rate;
876 static int is_intra_only(AVCodecContext *enc){
877 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
879 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
880 switch(enc->codec_id){
882 case CODEC_ID_MJPEGB:
884 case CODEC_ID_PRORES:
885 case CODEC_ID_RAWVIDEO:
887 case CODEC_ID_DVVIDEO:
888 case CODEC_ID_HUFFYUV:
889 case CODEC_ID_FFVHUFF:
894 case CODEC_ID_JPEG2000:
896 case CODEC_ID_UTVIDEO:
904 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
908 if (pktl == s->parse_queue_end)
909 return s->packet_buffer;
913 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
914 int64_t dts, int64_t pts)
916 AVStream *st= s->streams[stream_index];
917 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
919 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
922 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
925 if (is_relative(pts))
926 pts += st->first_dts - RELATIVE_TS_BASE;
928 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
929 if(pktl->pkt.stream_index != stream_index)
931 if(is_relative(pktl->pkt.pts))
932 pktl->pkt.pts += st->first_dts - RELATIVE_TS_BASE;
934 if(is_relative(pktl->pkt.dts))
935 pktl->pkt.dts += st->first_dts - RELATIVE_TS_BASE;
937 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
938 st->start_time= pktl->pkt.pts;
940 if (st->start_time == AV_NOPTS_VALUE)
941 st->start_time = pts;
944 static void update_initial_durations(AVFormatContext *s, AVStream *st,
945 int stream_index, int duration)
947 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
948 int64_t cur_dts= RELATIVE_TS_BASE;
950 if(st->first_dts != AV_NOPTS_VALUE){
951 cur_dts= st->first_dts;
952 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
953 if(pktl->pkt.stream_index == stream_index){
954 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
959 if(pktl && pktl->pkt.dts != st->first_dts) {
960 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));
964 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
967 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
968 st->first_dts = cur_dts;
969 }else if(st->cur_dts != RELATIVE_TS_BASE)
972 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
973 if(pktl->pkt.stream_index != stream_index)
975 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
976 && !pktl->pkt.duration){
977 pktl->pkt.dts= cur_dts;
978 if(!st->codec->has_b_frames)
979 pktl->pkt.pts= cur_dts;
980 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
981 pktl->pkt.duration = duration;
984 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
987 st->cur_dts= cur_dts;
990 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
991 AVCodecParserContext *pc, AVPacket *pkt)
993 int num, den, presentation_delayed, delay, i;
996 if (s->flags & AVFMT_FLAG_NOFILLIN)
999 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1000 pkt->dts= AV_NOPTS_VALUE;
1002 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1003 //FIXME Set low_delay = 0 when has_b_frames = 1
1004 st->codec->has_b_frames = 1;
1006 /* do we have a video B-frame ? */
1007 delay= st->codec->has_b_frames;
1008 presentation_delayed = 0;
1010 /* XXX: need has_b_frame, but cannot get it if the codec is
1013 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1014 presentation_delayed = 1;
1016 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){
1017 pkt->dts -= 1LL<<st->pts_wrap_bits;
1020 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1021 // we take the conservative approach and discard both
1022 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1023 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1024 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1025 pkt->dts= AV_NOPTS_VALUE;
1028 if (pkt->duration == 0) {
1029 compute_frame_duration(&num, &den, st, pc, pkt);
1031 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1034 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1035 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1037 /* correct timestamps with byte offset if demuxers only have timestamps
1038 on packet boundaries */
1039 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1040 /* this will estimate bitrate based on this frame's duration and size */
1041 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1042 if(pkt->pts != AV_NOPTS_VALUE)
1044 if(pkt->dts != AV_NOPTS_VALUE)
1048 if (pc && pc->dts_sync_point >= 0) {
1049 // we have synchronization info from the parser
1050 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1052 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1053 if (pkt->dts != AV_NOPTS_VALUE) {
1054 // got DTS from the stream, update reference timestamp
1055 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1056 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1057 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1058 // compute DTS based on reference timestamp
1059 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1060 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1062 if (pc->dts_sync_point > 0)
1063 st->reference_dts = pkt->dts; // new reference
1067 /* This may be redundant, but it should not hurt. */
1068 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1069 presentation_delayed = 1;
1071 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1072 // presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1073 /* interpolate PTS and DTS if they are not present */
1074 //We skip H264 currently because delay and has_b_frames are not reliably set
1075 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1076 if (presentation_delayed) {
1077 /* DTS = decompression timestamp */
1078 /* PTS = presentation timestamp */
1079 if (pkt->dts == AV_NOPTS_VALUE)
1080 pkt->dts = st->last_IP_pts;
1081 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1082 if (pkt->dts == AV_NOPTS_VALUE)
1083 pkt->dts = st->cur_dts;
1085 /* this is tricky: the dts must be incremented by the duration
1086 of the frame we are displaying, i.e. the last I- or P-frame */
1087 if (st->last_IP_duration == 0)
1088 st->last_IP_duration = pkt->duration;
1089 if(pkt->dts != AV_NOPTS_VALUE)
1090 st->cur_dts = pkt->dts + st->last_IP_duration;
1091 st->last_IP_duration = pkt->duration;
1092 st->last_IP_pts= pkt->pts;
1093 /* cannot compute PTS if not present (we can compute it only
1094 by knowing the future */
1095 } else if (pkt->pts != AV_NOPTS_VALUE ||
1096 pkt->dts != AV_NOPTS_VALUE ||
1098 int duration = pkt->duration;
1100 if(pkt->pts != AV_NOPTS_VALUE && duration){
1101 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1102 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1103 if( old_diff < new_diff && old_diff < (duration>>3)
1104 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1105 && (!strcmp(s->iformat->name, "mpeg") ||
1106 !strcmp(s->iformat->name, "mpegts"))){
1107 pkt->pts += duration;
1108 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1109 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1110 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1114 /* presentation is not delayed : PTS and DTS are the same */
1115 if (pkt->pts == AV_NOPTS_VALUE)
1116 pkt->pts = pkt->dts;
1117 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1119 if (pkt->pts == AV_NOPTS_VALUE)
1120 pkt->pts = st->cur_dts;
1121 pkt->dts = pkt->pts;
1122 if (pkt->pts != AV_NOPTS_VALUE)
1123 st->cur_dts = pkt->pts + duration;
1127 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1128 st->pts_buffer[0]= pkt->pts;
1129 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1130 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1131 if(pkt->dts == AV_NOPTS_VALUE)
1132 pkt->dts= st->pts_buffer[0];
1133 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1134 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1136 if(pkt->dts > st->cur_dts)
1137 st->cur_dts = pkt->dts;
1140 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1141 // presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1144 if(is_intra_only(st->codec))
1145 pkt->flags |= AV_PKT_FLAG_KEY;
1147 pkt->convergence_duration = pc->convergence_duration;
1150 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1153 AVPacketList *pktl = *pkt_buf;
1154 *pkt_buf = pktl->next;
1155 av_free_packet(&pktl->pkt);
1158 *pkt_buf_end = NULL;
1162 * Parse a packet, add all split parts to parse_queue
1164 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1166 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1168 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1169 AVStream *st = s->streams[stream_index];
1170 uint8_t *data = pkt ? pkt->data : NULL;
1171 int size = pkt ? pkt->size : 0;
1172 int ret = 0, got_output = 0;
1175 av_init_packet(&flush_pkt);
1178 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1179 // preserve 0-size sync packets
1180 compute_pkt_fields(s, st, st->parser, pkt);
1183 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1186 av_init_packet(&out_pkt);
1187 len = av_parser_parse2(st->parser, st->codec,
1188 &out_pkt.data, &out_pkt.size, data, size,
1189 pkt->pts, pkt->dts, pkt->pos);
1191 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1193 /* increment read pointer */
1197 got_output = !!out_pkt.size;
1202 /* set the duration */
1203 out_pkt.duration = 0;
1204 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1205 if (st->codec->sample_rate > 0) {
1206 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1207 (AVRational){ 1, st->codec->sample_rate },
1211 } else if (st->codec->time_base.num != 0 &&
1212 st->codec->time_base.den != 0) {
1213 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1214 st->codec->time_base,
1219 out_pkt.stream_index = st->index;
1220 out_pkt.pts = st->parser->pts;
1221 out_pkt.dts = st->parser->dts;
1222 out_pkt.pos = st->parser->pos;
1224 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1225 out_pkt.pos = st->parser->frame_offset;
1227 if (st->parser->key_frame == 1 ||
1228 (st->parser->key_frame == -1 &&
1229 st->parser->pict_type == AV_PICTURE_TYPE_I))
1230 out_pkt.flags |= AV_PKT_FLAG_KEY;
1232 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1233 out_pkt.flags |= AV_PKT_FLAG_KEY;
1235 compute_pkt_fields(s, st, st->parser, &out_pkt);
1237 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1238 out_pkt.destruct = pkt->destruct;
1239 pkt->destruct = NULL;
1241 if ((ret = av_dup_packet(&out_pkt)) < 0)
1244 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1245 av_free_packet(&out_pkt);
1246 ret = AVERROR(ENOMEM);
1252 /* end of the stream => close and free the parser */
1253 if (pkt == &flush_pkt) {
1254 av_parser_close(st->parser);
1259 av_free_packet(pkt);
1263 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1264 AVPacketList **pkt_buffer_end,
1268 av_assert0(*pkt_buffer);
1271 *pkt_buffer = pktl->next;
1273 *pkt_buffer_end = NULL;
1278 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1280 int ret = 0, i, got_packet = 0;
1282 av_init_packet(pkt);
1284 while (!got_packet && !s->parse_queue) {
1288 /* read next packet */
1289 ret = ff_read_packet(s, &cur_pkt);
1291 if (ret == AVERROR(EAGAIN))
1293 /* flush the parsers */
1294 for(i = 0; i < s->nb_streams; i++) {
1296 if (st->parser && st->need_parsing)
1297 parse_packet(s, NULL, st->index);
1299 /* all remaining packets are now in parse_queue =>
1300 * really terminate parsing */
1304 st = s->streams[cur_pkt.stream_index];
1306 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1307 cur_pkt.dts != AV_NOPTS_VALUE &&
1308 cur_pkt.pts < cur_pkt.dts) {
1309 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1310 cur_pkt.stream_index,
1311 av_ts2str(cur_pkt.pts),
1312 av_ts2str(cur_pkt.dts),
1315 if (s->debug & FF_FDEBUG_TS)
1316 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1317 cur_pkt.stream_index,
1318 av_ts2str(cur_pkt.pts),
1319 av_ts2str(cur_pkt.dts),
1324 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1325 st->parser = av_parser_init(st->codec->codec_id);
1327 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1328 "%s, packets or times may be invalid.\n",
1329 avcodec_get_name(st->codec->codec_id));
1330 /* no parser available: just output the raw packets */
1331 st->need_parsing = AVSTREAM_PARSE_NONE;
1332 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1333 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1334 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1335 st->parser->flags |= PARSER_FLAG_ONCE;
1336 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1337 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1341 if (!st->need_parsing || !st->parser) {
1342 /* no parsing needed: we just output the packet as is */
1344 compute_pkt_fields(s, st, NULL, pkt);
1345 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1346 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1347 ff_reduce_index(s, st->index);
1348 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1351 } else if (st->discard < AVDISCARD_ALL) {
1352 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1356 av_free_packet(&cur_pkt);
1358 if (pkt->flags & AV_PKT_FLAG_KEY)
1359 st->skip_to_keyframe = 0;
1360 if (st->skip_to_keyframe) {
1361 av_free_packet(&cur_pkt);
1366 if (!got_packet && s->parse_queue)
1367 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1369 if(s->debug & FF_FDEBUG_TS)
1370 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1372 av_ts2str(pkt->pts),
1373 av_ts2str(pkt->dts),
1381 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1383 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1389 ret = s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1390 &s->packet_buffer_end,
1392 read_frame_internal(s, pkt);
1397 AVPacketList *pktl = s->packet_buffer;
1400 AVPacket *next_pkt = &pktl->pkt;
1402 if (next_pkt->dts != AV_NOPTS_VALUE) {
1403 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1404 // last dts seen for this stream. if any of packets following
1405 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1406 int64_t last_dts = next_pkt->dts;
1407 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1408 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1409 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1410 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1411 next_pkt->pts = pktl->pkt.dts;
1413 if (last_dts != AV_NOPTS_VALUE) {
1414 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1415 last_dts = pktl->pkt.dts;
1420 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1421 // Fixing the last reference frame had none pts issue (For MXF etc).
1422 // We only do this when
1424 // 2. we are not able to resolve a pts value for current packet.
1425 // 3. the packets for this stream at the end of the files had valid dts.
1426 next_pkt->pts = last_dts + next_pkt->duration;
1428 pktl = s->packet_buffer;
1431 /* read packet from packet buffer, if there is data */
1432 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1433 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1434 ret = read_from_packet_buffer(&s->packet_buffer,
1435 &s->packet_buffer_end, pkt);
1440 ret = read_frame_internal(s, pkt);
1442 if (pktl && ret != AVERROR(EAGAIN)) {
1449 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1450 &s->packet_buffer_end)) < 0)
1451 return AVERROR(ENOMEM);
1456 st = s->streams[pkt->stream_index];
1457 if (st->skip_samples) {
1458 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1459 AV_WL32(p, st->skip_samples);
1460 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1461 st->skip_samples = 0;
1464 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1465 ff_reduce_index(s, st->index);
1466 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1469 if (is_relative(pkt->dts))
1470 pkt->dts -= RELATIVE_TS_BASE;
1471 if (is_relative(pkt->pts))
1472 pkt->pts -= RELATIVE_TS_BASE;
1477 /* XXX: suppress the packet queue */
1478 static void flush_packet_queue(AVFormatContext *s)
1480 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1481 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1482 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1484 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1487 /*******************************************************/
1490 int av_find_default_stream_index(AVFormatContext *s)
1492 int first_audio_index = -1;
1496 if (s->nb_streams <= 0)
1498 for(i = 0; i < s->nb_streams; i++) {
1500 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1501 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1504 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1505 first_audio_index = i;
1507 return first_audio_index >= 0 ? first_audio_index : 0;
1511 * Flush the frame reader.
1513 void ff_read_frame_flush(AVFormatContext *s)
1518 flush_packet_queue(s);
1520 /* for each stream, reset read state */
1521 for(i = 0; i < s->nb_streams; i++) {
1525 av_parser_close(st->parser);
1528 st->last_IP_pts = AV_NOPTS_VALUE;
1529 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1530 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1531 st->reference_dts = AV_NOPTS_VALUE;
1533 st->probe_packets = MAX_PROBE_PACKETS;
1535 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1536 st->pts_buffer[j]= AV_NOPTS_VALUE;
1540 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1544 for(i = 0; i < s->nb_streams; i++) {
1545 AVStream *st = s->streams[i];
1547 st->cur_dts = av_rescale(timestamp,
1548 st->time_base.den * (int64_t)ref_st->time_base.num,
1549 st->time_base.num * (int64_t)ref_st->time_base.den);
1553 void ff_reduce_index(AVFormatContext *s, int stream_index)
1555 AVStream *st= s->streams[stream_index];
1556 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1558 if((unsigned)st->nb_index_entries >= max_entries){
1560 for(i=0; 2*i<st->nb_index_entries; i++)
1561 st->index_entries[i]= st->index_entries[2*i];
1562 st->nb_index_entries= i;
1566 int ff_add_index_entry(AVIndexEntry **index_entries,
1567 int *nb_index_entries,
1568 unsigned int *index_entries_allocated_size,
1569 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1571 AVIndexEntry *entries, *ie;
1574 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1577 if(timestamp == AV_NOPTS_VALUE)
1578 return AVERROR(EINVAL);
1580 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1581 timestamp -= RELATIVE_TS_BASE;
1583 entries = av_fast_realloc(*index_entries,
1584 index_entries_allocated_size,
1585 (*nb_index_entries + 1) *
1586 sizeof(AVIndexEntry));
1590 *index_entries= entries;
1592 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1595 index= (*nb_index_entries)++;
1596 ie= &entries[index];
1597 assert(index==0 || ie[-1].timestamp < timestamp);
1599 ie= &entries[index];
1600 if(ie->timestamp != timestamp){
1601 if(ie->timestamp <= timestamp)
1603 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1604 (*nb_index_entries)++;
1605 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1606 distance= ie->min_distance;
1610 ie->timestamp = timestamp;
1611 ie->min_distance= distance;
1618 int av_add_index_entry(AVStream *st,
1619 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1621 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1622 &st->index_entries_allocated_size, pos,
1623 timestamp, size, distance, flags);
1626 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1627 int64_t wanted_timestamp, int flags)
1635 //optimize appending index entries at the end
1636 if(b && entries[b-1].timestamp < wanted_timestamp)
1641 timestamp = entries[m].timestamp;
1642 if(timestamp >= wanted_timestamp)
1644 if(timestamp <= wanted_timestamp)
1647 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1649 if(!(flags & AVSEEK_FLAG_ANY)){
1650 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1651 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1660 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1663 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1664 wanted_timestamp, flags);
1667 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1669 AVInputFormat *avif= s->iformat;
1670 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1671 int64_t ts_min, ts_max, ts;
1676 if (stream_index < 0)
1679 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1682 ts_min= AV_NOPTS_VALUE;
1683 pos_limit= -1; //gcc falsely says it may be uninitialized
1685 st= s->streams[stream_index];
1686 if(st->index_entries){
1689 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()
1690 index= FFMAX(index, 0);
1691 e= &st->index_entries[index];
1693 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1695 ts_min= e->timestamp;
1696 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1697 pos_min, av_ts2str(ts_min));
1702 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1703 assert(index < st->nb_index_entries);
1705 e= &st->index_entries[index];
1706 assert(e->timestamp >= target_ts);
1708 ts_max= e->timestamp;
1709 pos_limit= pos_max - e->min_distance;
1710 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1711 pos_max, pos_limit, av_ts2str(ts_max));
1715 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1720 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1723 ff_read_frame_flush(s);
1724 ff_update_cur_dts(s, st, ts);
1729 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1730 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1731 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1732 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1735 int64_t start_pos, filesize;
1738 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1740 if(ts_min == AV_NOPTS_VALUE){
1741 pos_min = s->data_offset;
1742 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1743 if (ts_min == AV_NOPTS_VALUE)
1747 if(ts_min >= target_ts){
1752 if(ts_max == AV_NOPTS_VALUE){
1754 filesize = avio_size(s->pb);
1755 pos_max = filesize - 1;
1758 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1760 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1761 if (ts_max == AV_NOPTS_VALUE)
1765 int64_t tmp_pos= pos_max + 1;
1766 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1767 if(tmp_ts == AV_NOPTS_VALUE)
1771 if(tmp_pos >= filesize)
1777 if(ts_max <= target_ts){
1782 if(ts_min > ts_max){
1784 }else if(ts_min == ts_max){
1789 while (pos_min < pos_limit) {
1790 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1791 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1792 assert(pos_limit <= pos_max);
1795 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1796 // interpolate position (better than dichotomy)
1797 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1798 + pos_min - approximate_keyframe_distance;
1799 }else if(no_change==1){
1800 // bisection, if interpolation failed to change min or max pos last time
1801 pos = (pos_min + pos_limit)>>1;
1803 /* linear search if bisection failed, can only happen if there
1804 are very few or no keyframes between min/max */
1809 else if(pos > pos_limit)
1813 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1818 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1819 pos_min, pos, pos_max,
1820 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1821 pos_limit, start_pos, no_change);
1822 if(ts == AV_NOPTS_VALUE){
1823 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1826 assert(ts != AV_NOPTS_VALUE);
1827 if (target_ts <= ts) {
1828 pos_limit = start_pos - 1;
1832 if (target_ts >= ts) {
1838 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1839 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1842 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1844 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1845 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1846 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1852 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1853 int64_t pos_min, pos_max;
1855 pos_min = s->data_offset;
1856 pos_max = avio_size(s->pb) - 1;
1858 if (pos < pos_min) pos= pos_min;
1859 else if(pos > pos_max) pos= pos_max;
1861 avio_seek(s->pb, pos, SEEK_SET);
1866 static int seek_frame_generic(AVFormatContext *s,
1867 int stream_index, int64_t timestamp, int flags)
1874 st = s->streams[stream_index];
1876 index = av_index_search_timestamp(st, timestamp, flags);
1878 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1881 if(index < 0 || index==st->nb_index_entries-1){
1885 if(st->nb_index_entries){
1886 assert(st->index_entries);
1887 ie= &st->index_entries[st->nb_index_entries-1];
1888 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1890 ff_update_cur_dts(s, st, ie->timestamp);
1892 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1898 read_status = av_read_frame(s, &pkt);
1899 } while (read_status == AVERROR(EAGAIN));
1900 if (read_status < 0)
1902 av_free_packet(&pkt);
1903 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1904 if(pkt.flags & AV_PKT_FLAG_KEY)
1906 if(nonkey++ > 1000 && st->codec->codec_id != CODEC_ID_CDGRAPHICS){
1907 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);
1912 index = av_index_search_timestamp(st, timestamp, flags);
1917 ff_read_frame_flush(s);
1918 AV_NOWARN_DEPRECATED(
1919 if (s->iformat->read_seek){
1920 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1924 ie = &st->index_entries[index];
1925 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1927 ff_update_cur_dts(s, st, ie->timestamp);
1932 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1933 int64_t timestamp, int flags)
1938 if (flags & AVSEEK_FLAG_BYTE) {
1939 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1941 ff_read_frame_flush(s);
1942 return seek_frame_byte(s, stream_index, timestamp, flags);
1945 if(stream_index < 0){
1946 stream_index= av_find_default_stream_index(s);
1947 if(stream_index < 0)
1950 st= s->streams[stream_index];
1951 /* timestamp for default must be expressed in AV_TIME_BASE units */
1952 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1955 /* first, we try the format specific seek */
1956 AV_NOWARN_DEPRECATED(
1957 if (s->iformat->read_seek) {
1958 ff_read_frame_flush(s);
1959 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1967 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1968 ff_read_frame_flush(s);
1969 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1970 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1971 ff_read_frame_flush(s);
1972 return seek_frame_generic(s, stream_index, timestamp, flags);
1978 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1980 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1983 queue_attached_pictures(s);
1988 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1990 if(min_ts > ts || max_ts < ts)
1993 if (s->iformat->read_seek2) {
1995 ff_read_frame_flush(s);
1996 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1999 queue_attached_pictures(s);
2003 if(s->iformat->read_timestamp){
2004 //try to seek via read_timestamp()
2007 //Fallback to old API if new is not implemented but old is
2008 //Note the old has somewat different sematics
2009 AV_NOWARN_DEPRECATED(
2010 if (s->iformat->read_seek || 1) {
2011 int dir = (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0);
2012 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2013 if (ret<0 && ts != min_ts && max_ts != ts) {
2014 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2016 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2022 // try some generic seek like seek_frame_generic() but with new ts semantics
2025 /*******************************************************/
2028 * Return TRUE if the stream has accurate duration in any stream.
2030 * @return TRUE if the stream has accurate duration for at least one component.
2032 static int has_duration(AVFormatContext *ic)
2037 for(i = 0;i < ic->nb_streams; i++) {
2038 st = ic->streams[i];
2039 if (st->duration != AV_NOPTS_VALUE)
2042 if (ic->duration != AV_NOPTS_VALUE)
2048 * Estimate the stream timings from the one of each components.
2050 * Also computes the global bitrate if possible.
2052 static void update_stream_timings(AVFormatContext *ic)
2054 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2055 int64_t duration, duration1, filesize;
2059 start_time = INT64_MAX;
2060 start_time_text = INT64_MAX;
2061 end_time = INT64_MIN;
2062 duration = INT64_MIN;
2063 for(i = 0;i < ic->nb_streams; i++) {
2064 st = ic->streams[i];
2065 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2066 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2067 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2068 if (start_time1 < start_time_text)
2069 start_time_text = start_time1;
2071 start_time = FFMIN(start_time, start_time1);
2072 if (st->duration != AV_NOPTS_VALUE) {
2073 end_time1 = start_time1
2074 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2075 end_time = FFMAX(end_time, end_time1);
2078 if (st->duration != AV_NOPTS_VALUE) {
2079 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2080 duration = FFMAX(duration, duration1);
2083 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2084 start_time = start_time_text;
2085 else if(start_time > start_time_text)
2086 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2088 if (start_time != INT64_MAX) {
2089 ic->start_time = start_time;
2090 if (end_time != INT64_MIN)
2091 duration = FFMAX(duration, end_time - start_time);
2093 if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
2094 ic->duration = duration;
2096 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2097 /* compute the bitrate */
2098 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2099 (double)ic->duration;
2103 static void fill_all_stream_timings(AVFormatContext *ic)
2108 update_stream_timings(ic);
2109 for(i = 0;i < ic->nb_streams; i++) {
2110 st = ic->streams[i];
2111 if (st->start_time == AV_NOPTS_VALUE) {
2112 if(ic->start_time != AV_NOPTS_VALUE)
2113 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2114 if(ic->duration != AV_NOPTS_VALUE)
2115 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2120 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2122 int64_t filesize, duration;
2126 /* if bit_rate is already set, we believe it */
2127 if (ic->bit_rate <= 0) {
2129 for(i=0;i<ic->nb_streams;i++) {
2130 st = ic->streams[i];
2131 if (st->codec->bit_rate > 0)
2132 bit_rate += st->codec->bit_rate;
2134 ic->bit_rate = bit_rate;
2137 /* if duration is already set, we believe it */
2138 if (ic->duration == AV_NOPTS_VALUE &&
2139 ic->bit_rate != 0) {
2140 filesize = ic->pb ? avio_size(ic->pb) : 0;
2142 for(i = 0; i < ic->nb_streams; i++) {
2143 st = ic->streams[i];
2144 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2145 if (st->duration == AV_NOPTS_VALUE)
2146 st->duration = duration;
2152 #define DURATION_MAX_READ_SIZE 250000
2153 #define DURATION_MAX_RETRY 3
2155 /* only usable for MPEG-PS streams */
2156 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2158 AVPacket pkt1, *pkt = &pkt1;
2160 int read_size, i, ret;
2162 int64_t filesize, offset, duration;
2165 /* flush packet queue */
2166 flush_packet_queue(ic);
2168 for (i=0; i<ic->nb_streams; i++) {
2169 st = ic->streams[i];
2170 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2171 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2174 av_parser_close(st->parser);
2179 /* estimate the end time (duration) */
2180 /* XXX: may need to support wrapping */
2181 filesize = ic->pb ? avio_size(ic->pb) : 0;
2182 end_time = AV_NOPTS_VALUE;
2184 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2188 avio_seek(ic->pb, offset, SEEK_SET);
2191 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2195 ret = ff_read_packet(ic, pkt);
2196 } while(ret == AVERROR(EAGAIN));
2199 read_size += pkt->size;
2200 st = ic->streams[pkt->stream_index];
2201 if (pkt->pts != AV_NOPTS_VALUE &&
2202 (st->start_time != AV_NOPTS_VALUE ||
2203 st->first_dts != AV_NOPTS_VALUE)) {
2204 duration = end_time = pkt->pts;
2205 if (st->start_time != AV_NOPTS_VALUE)
2206 duration -= st->start_time;
2208 duration -= st->first_dts;
2210 duration += 1LL<<st->pts_wrap_bits;
2212 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2213 st->duration = duration;
2216 av_free_packet(pkt);
2218 }while( end_time==AV_NOPTS_VALUE
2219 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2220 && ++retry <= DURATION_MAX_RETRY);
2222 fill_all_stream_timings(ic);
2224 avio_seek(ic->pb, old_offset, SEEK_SET);
2225 for (i=0; i<ic->nb_streams; i++) {
2227 st->cur_dts= st->first_dts;
2228 st->last_IP_pts = AV_NOPTS_VALUE;
2229 st->reference_dts = AV_NOPTS_VALUE;
2233 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2237 /* get the file size, if possible */
2238 if (ic->iformat->flags & AVFMT_NOFILE) {
2241 file_size = avio_size(ic->pb);
2242 file_size = FFMAX(0, file_size);
2245 if ((!strcmp(ic->iformat->name, "mpeg") ||
2246 !strcmp(ic->iformat->name, "mpegts")) &&
2247 file_size && ic->pb->seekable) {
2248 /* get accurate estimate from the PTSes */
2249 estimate_timings_from_pts(ic, old_offset);
2250 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2251 } else if (has_duration(ic)) {
2252 /* at least one component has timings - we use them for all
2254 fill_all_stream_timings(ic);
2255 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2257 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2258 /* less precise: use bitrate info */
2259 estimate_timings_from_bit_rate(ic);
2260 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2262 update_stream_timings(ic);
2266 AVStream av_unused *st;
2267 for(i = 0;i < ic->nb_streams; i++) {
2268 st = ic->streams[i];
2269 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2270 (double) st->start_time / AV_TIME_BASE,
2271 (double) st->duration / AV_TIME_BASE);
2273 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2274 (double) ic->start_time / AV_TIME_BASE,
2275 (double) ic->duration / AV_TIME_BASE,
2276 ic->bit_rate / 1000);
2280 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2282 AVCodecContext *avctx = st->codec;
2284 #define FAIL(errmsg) do { \
2286 *errmsg_ptr = errmsg; \
2290 switch (avctx->codec_type) {
2291 case AVMEDIA_TYPE_AUDIO:
2292 if (!avctx->frame_size && determinable_frame_size(avctx))
2293 FAIL("unspecified sample size");
2294 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2295 FAIL("unspecified sample format");
2296 if (!avctx->sample_rate)
2297 FAIL("unspecified sample rate");
2298 if (!avctx->channels)
2299 FAIL("unspecified number of channels");
2301 case AVMEDIA_TYPE_VIDEO:
2303 FAIL("unspecified size");
2304 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2305 FAIL("unspecified pixel format");
2307 case AVMEDIA_TYPE_DATA:
2308 if(avctx->codec_id == CODEC_ID_NONE) return 1;
2311 if (avctx->codec_id == CODEC_ID_NONE)
2312 FAIL("unknown codec");
2316 static int has_decode_delay_been_guessed(AVStream *st)
2318 if(st->codec->codec_id != CODEC_ID_H264) return 1;
2319 #if CONFIG_H264_DECODER
2320 if(st->codec->has_b_frames &&
2321 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
2324 if(st->codec->has_b_frames<3)
2325 return st->info->nb_decoded_frames >= 6;
2326 else if(st->codec->has_b_frames<4)
2327 return st->info->nb_decoded_frames >= 18;
2329 return st->info->nb_decoded_frames >= 20;
2332 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2333 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2336 int got_picture = 1, ret = 0;
2338 AVPacket pkt = *avpkt;
2340 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2341 AVDictionary *thread_opt = NULL;
2343 codec = st->codec->codec ? st->codec->codec :
2344 avcodec_find_decoder(st->codec->codec_id);
2347 st->info->found_decoder = -1;
2351 /* force thread count to 1 since the h264 decoder will not extract SPS
2352 * and PPS to extradata during multi-threaded decoding */
2353 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2354 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2356 av_dict_free(&thread_opt);
2358 st->info->found_decoder = -1;
2361 st->info->found_decoder = 1;
2362 } else if (!st->info->found_decoder)
2363 st->info->found_decoder = 1;
2365 if (st->info->found_decoder < 0)
2368 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2370 (!has_codec_parameters(st, NULL) ||
2371 !has_decode_delay_been_guessed(st) ||
2372 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2374 avcodec_get_frame_defaults(&picture);
2375 switch(st->codec->codec_type) {
2376 case AVMEDIA_TYPE_VIDEO:
2377 ret = avcodec_decode_video2(st->codec, &picture,
2378 &got_picture, &pkt);
2380 case AVMEDIA_TYPE_AUDIO:
2381 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2388 st->info->nb_decoded_frames++;
2394 if(!pkt.data && !got_picture)
2399 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2401 while (tags->id != CODEC_ID_NONE) {
2409 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2412 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2413 if(tag == tags[i].tag)
2416 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2417 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2420 return CODEC_ID_NONE;
2423 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2426 for(i=0; tags && tags[i]; i++){
2427 int tag= ff_codec_get_tag(tags[i], id);
2433 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2436 for(i=0; tags && tags[i]; i++){
2437 enum CodecID id= ff_codec_get_id(tags[i], tag);
2438 if(id!=CODEC_ID_NONE) return id;
2440 return CODEC_ID_NONE;
2443 static void compute_chapters_end(AVFormatContext *s)
2446 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2448 for (i = 0; i < s->nb_chapters; i++)
2449 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2450 AVChapter *ch = s->chapters[i];
2451 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2454 for (j = 0; j < s->nb_chapters; j++) {
2455 AVChapter *ch1 = s->chapters[j];
2456 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2457 if (j != i && next_start > ch->start && next_start < end)
2460 ch->end = (end == INT64_MAX) ? ch->start : end;
2464 static int get_std_framerate(int i){
2465 if(i<60*12) return (i+1)*1001;
2466 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2470 * Is the time base unreliable.
2471 * This is a heuristic to balance between quick acceptance of the values in
2472 * the headers vs. some extra checks.
2473 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2474 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2475 * And there are "variable" fps files this needs to detect as well.
2477 static int tb_unreliable(AVCodecContext *c){
2478 if( c->time_base.den >= 101L*c->time_base.num
2479 || c->time_base.den < 5L*c->time_base.num
2480 /* || c->codec_tag == AV_RL32("DIVX")
2481 || c->codec_tag == AV_RL32("XVID")*/
2482 || c->codec_id == CODEC_ID_MPEG2VIDEO
2483 || c->codec_id == CODEC_ID_H264
2489 #if FF_API_FORMAT_PARAMETERS
2490 int av_find_stream_info(AVFormatContext *ic)
2492 return avformat_find_stream_info(ic, NULL);
2496 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2498 int i, count, ret, read_size, j;
2500 AVPacket pkt1, *pkt;
2501 int64_t old_offset = avio_tell(ic->pb);
2502 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2503 int flush_codecs = ic->probesize > 0;
2506 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2508 for(i=0;i<ic->nb_streams;i++) {
2510 AVDictionary *thread_opt = NULL;
2511 st = ic->streams[i];
2513 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2514 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2515 /* if(!st->time_base.num)
2517 if(!st->codec->time_base.num)
2518 st->codec->time_base= st->time_base;
2520 //only for the split stuff
2521 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2522 st->parser = av_parser_init(st->codec->codec_id);
2524 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2525 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2526 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2527 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2529 } else if (st->need_parsing) {
2530 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2531 "%s, packets or times may be invalid.\n",
2532 avcodec_get_name(st->codec->codec_id));
2535 codec = st->codec->codec ? st->codec->codec :
2536 avcodec_find_decoder(st->codec->codec_id);
2538 /* force thread count to 1 since the h264 decoder will not extract SPS
2539 * and PPS to extradata during multi-threaded decoding */
2540 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2542 /* Ensure that subtitle_header is properly set. */
2543 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2544 && codec && !st->codec->codec)
2545 avcodec_open2(st->codec, codec, options ? &options[i]
2548 //try to just open decoders, in case this is enough to get parameters
2549 if (!has_codec_parameters(st, NULL)) {
2550 if (codec && !st->codec->codec)
2551 avcodec_open2(st->codec, codec, options ? &options[i]
2555 av_dict_free(&thread_opt);
2558 for (i=0; i<ic->nb_streams; i++) {
2559 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2565 if (ff_check_interrupt(&ic->interrupt_callback)){
2567 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2571 /* check if one codec still needs to be handled */
2572 for(i=0;i<ic->nb_streams;i++) {
2573 int fps_analyze_framecount = 20;
2575 st = ic->streams[i];
2576 if (!has_codec_parameters(st, NULL))
2578 /* if the timebase is coarse (like the usual millisecond precision
2579 of mkv), we need to analyze more frames to reliably arrive at
2581 if (av_q2d(st->time_base) > 0.0005)
2582 fps_analyze_framecount *= 2;
2583 if (ic->fps_probe_size >= 0)
2584 fps_analyze_framecount = ic->fps_probe_size;
2585 /* variable fps and no guess at the real fps */
2586 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2587 && st->info->duration_count < fps_analyze_framecount
2588 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2590 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2592 if (st->first_dts == AV_NOPTS_VALUE &&
2593 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2594 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2597 if (i == ic->nb_streams) {
2598 /* NOTE: if the format has no header, then we need to read
2599 some packets to get most of the streams, so we cannot
2601 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2602 /* if we found the info for all the codecs, we can stop */
2604 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2609 /* we did not get all the codec info, but we read too much data */
2610 if (read_size >= ic->probesize) {
2612 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2613 for (i = 0; i < ic->nb_streams; i++)
2614 if (!ic->streams[i]->r_frame_rate.num &&
2615 ic->streams[i]->info->duration_count <= 1)
2616 av_log(ic, AV_LOG_WARNING,
2617 "Stream #%d: not enough frames to estimate rate; "
2618 "consider increasing probesize\n", i);
2622 /* NOTE: a new stream can be added there if no header in file
2623 (AVFMTCTX_NOHEADER) */
2624 ret = read_frame_internal(ic, &pkt1);
2625 if (ret == AVERROR(EAGAIN))
2633 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2634 if ((ret = av_dup_packet(pkt)) < 0)
2635 goto find_stream_info_err;
2637 read_size += pkt->size;
2639 st = ic->streams[pkt->stream_index];
2640 if (st->codec_info_nb_frames>1) {
2642 if (st->time_base.den > 0)
2643 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2644 if (st->avg_frame_rate.num > 0)
2645 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));
2647 if (t >= ic->max_analyze_duration) {
2648 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2651 st->info->codec_info_duration += pkt->duration;
2654 int64_t last = st->info->last_dts;
2656 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2657 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2658 int64_t duration= pkt->dts - last;
2660 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2661 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2662 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2663 int framerate= get_std_framerate(i);
2664 double sdts= dts*framerate/(1001*12);
2666 int ticks= lrintf(sdts+j*0.5);
2667 double error= sdts - ticks + j*0.5;
2668 st->info->duration_error[j][0][i] += error;
2669 st->info->duration_error[j][1][i] += error*error;
2672 st->info->duration_count++;
2673 // ignore the first 4 values, they might have some random jitter
2674 if (st->info->duration_count > 3)
2675 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2677 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2678 st->info->last_dts = pkt->dts;
2680 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2681 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2682 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2683 st->codec->extradata_size= i;
2684 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2685 if (!st->codec->extradata)
2686 return AVERROR(ENOMEM);
2687 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2688 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2692 /* if still no information, we try to open the codec and to
2693 decompress the frame. We try to avoid that in most cases as
2694 it takes longer and uses more memory. For MPEG-4, we need to
2695 decompress for QuickTime.
2697 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2698 least one frame of codec data, this makes sure the codec initializes
2699 the channel configuration and does not only trust the values from the container.
2701 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2703 st->codec_info_nb_frames++;
2708 AVPacket empty_pkt = { 0 };
2710 av_init_packet(&empty_pkt);
2712 ret = -1; /* we could not have all the codec parameters before EOF */
2713 for(i=0;i<ic->nb_streams;i++) {
2716 st = ic->streams[i];
2718 /* flush the decoders */
2719 if (st->info->found_decoder == 1) {
2721 err = try_decode_frame(st, &empty_pkt,
2722 (options && i < orig_nb_streams) ?
2723 &options[i] : NULL);
2724 } while (err > 0 && !has_codec_parameters(st, NULL));
2727 av_log(ic, AV_LOG_INFO,
2728 "decoding for stream %d failed\n", st->index);
2732 if (!has_codec_parameters(st, &errmsg)) {
2734 avcodec_string(buf, sizeof(buf), st->codec, 0);
2735 av_log(ic, AV_LOG_WARNING,
2736 "Could not find codec parameters for stream %d (%s): %s\n"
2737 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2745 // close codecs which were opened in try_decode_frame()
2746 for(i=0;i<ic->nb_streams;i++) {
2747 st = ic->streams[i];
2748 avcodec_close(st->codec);
2750 for(i=0;i<ic->nb_streams;i++) {
2751 st = ic->streams[i];
2752 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2753 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2754 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2755 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2756 st->codec->codec_tag= tag;
2759 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2760 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2761 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2762 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2763 // the check for tb_unreliable() is not completely correct, since this is not about handling
2764 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2765 // ipmovie.c produces.
2766 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)
2767 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);
2768 if (st->info->duration_count && !st->r_frame_rate.num
2769 && tb_unreliable(st->codec)) {
2771 double best_error= 0.01;
2773 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2776 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2778 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2781 int n= st->info->duration_count;
2782 double a= st->info->duration_error[k][0][j] / n;
2783 double error= st->info->duration_error[k][1][j]/n - a*a;
2785 if(error < best_error && best_error> 0.000000001){
2787 num = get_std_framerate(j);
2790 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2793 // do not increase frame rate by more than 1 % in order to match a standard rate.
2794 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2795 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2798 if (!st->r_frame_rate.num){
2799 if( st->codec->time_base.den * (int64_t)st->time_base.num
2800 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2801 st->r_frame_rate.num = st->codec->time_base.den;
2802 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2804 st->r_frame_rate.num = st->time_base.den;
2805 st->r_frame_rate.den = st->time_base.num;
2808 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2809 if(!st->codec->bits_per_coded_sample)
2810 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2811 // set stream disposition based on audio service type
2812 switch (st->codec->audio_service_type) {
2813 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2814 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2815 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2816 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2817 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2818 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2819 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2820 st->disposition = AV_DISPOSITION_COMMENT; break;
2821 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2822 st->disposition = AV_DISPOSITION_KARAOKE; break;
2828 estimate_timings(ic, old_offset);
2830 compute_chapters_end(ic);
2832 find_stream_info_err:
2833 for (i=0; i < ic->nb_streams; i++) {
2834 if (ic->streams[i]->codec)
2835 ic->streams[i]->codec->thread_count = 0;
2836 av_freep(&ic->streams[i]->info);
2839 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2843 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2847 for (i = 0; i < ic->nb_programs; i++) {
2848 if (ic->programs[i] == last) {
2852 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2853 if (ic->programs[i]->stream_index[j] == s)
2854 return ic->programs[i];
2860 int av_find_best_stream(AVFormatContext *ic,
2861 enum AVMediaType type,
2862 int wanted_stream_nb,
2864 AVCodec **decoder_ret,
2867 int i, nb_streams = ic->nb_streams;
2868 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2869 unsigned *program = NULL;
2870 AVCodec *decoder = NULL, *best_decoder = NULL;
2872 if (related_stream >= 0 && wanted_stream_nb < 0) {
2873 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2875 program = p->stream_index;
2876 nb_streams = p->nb_stream_indexes;
2879 for (i = 0; i < nb_streams; i++) {
2880 int real_stream_index = program ? program[i] : i;
2881 AVStream *st = ic->streams[real_stream_index];
2882 AVCodecContext *avctx = st->codec;
2883 if (avctx->codec_type != type)
2885 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2887 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2890 decoder = avcodec_find_decoder(st->codec->codec_id);
2893 ret = AVERROR_DECODER_NOT_FOUND;
2897 if (best_count >= st->codec_info_nb_frames)
2899 best_count = st->codec_info_nb_frames;
2900 ret = real_stream_index;
2901 best_decoder = decoder;
2902 if (program && i == nb_streams - 1 && ret < 0) {
2904 nb_streams = ic->nb_streams;
2905 i = 0; /* no related stream found, try again with everything */
2909 *decoder_ret = best_decoder;
2913 /*******************************************************/
2915 int av_read_play(AVFormatContext *s)
2917 if (s->iformat->read_play)
2918 return s->iformat->read_play(s);
2920 return avio_pause(s->pb, 0);
2921 return AVERROR(ENOSYS);
2924 int av_read_pause(AVFormatContext *s)
2926 if (s->iformat->read_pause)
2927 return s->iformat->read_pause(s);
2929 return avio_pause(s->pb, 1);
2930 return AVERROR(ENOSYS);
2933 void avformat_free_context(AVFormatContext *s)
2939 if (s->iformat && s->iformat->priv_class && s->priv_data)
2940 av_opt_free(s->priv_data);
2942 for(i=0;i<s->nb_streams;i++) {
2943 /* free all data in a stream component */
2946 av_parser_close(st->parser);
2948 if (st->attached_pic.data)
2949 av_free_packet(&st->attached_pic);
2950 av_dict_free(&st->metadata);
2951 av_freep(&st->index_entries);
2952 av_freep(&st->codec->extradata);
2953 av_freep(&st->codec->subtitle_header);
2954 av_freep(&st->codec);
2955 av_freep(&st->priv_data);
2956 av_freep(&st->info);
2959 for(i=s->nb_programs-1; i>=0; i--) {
2960 av_dict_free(&s->programs[i]->metadata);
2961 av_freep(&s->programs[i]->stream_index);
2962 av_freep(&s->programs[i]);
2964 av_freep(&s->programs);
2965 av_freep(&s->priv_data);
2966 while(s->nb_chapters--) {
2967 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2968 av_freep(&s->chapters[s->nb_chapters]);
2970 av_freep(&s->chapters);
2971 av_dict_free(&s->metadata);
2972 av_freep(&s->streams);
2976 #if FF_API_CLOSE_INPUT_FILE
2977 void av_close_input_file(AVFormatContext *s)
2979 avformat_close_input(&s);
2983 void avformat_close_input(AVFormatContext **ps)
2985 AVFormatContext *s = *ps;
2986 AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2988 flush_packet_queue(s);
2989 if (s->iformat && (s->iformat->read_close))
2990 s->iformat->read_close(s);
2991 avformat_free_context(s);
2997 #if FF_API_NEW_STREAM
2998 AVStream *av_new_stream(AVFormatContext *s, int id)
3000 AVStream *st = avformat_new_stream(s, NULL);
3007 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
3013 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3015 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3018 s->streams = streams;
3020 st = av_mallocz(sizeof(AVStream));
3023 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3027 st->info->last_dts = AV_NOPTS_VALUE;
3029 st->codec = avcodec_alloc_context3(c);
3031 /* no default bitrate if decoding */
3032 st->codec->bit_rate = 0;
3034 st->index = s->nb_streams;
3035 st->start_time = AV_NOPTS_VALUE;
3036 st->duration = AV_NOPTS_VALUE;
3037 /* we set the current DTS to 0 so that formats without any timestamps
3038 but durations get some timestamps, formats with some unknown
3039 timestamps have their first few packets buffered and the
3040 timestamps corrected before they are returned to the user */
3041 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3042 st->first_dts = AV_NOPTS_VALUE;
3043 st->probe_packets = MAX_PROBE_PACKETS;
3045 /* default pts setting is MPEG-like */
3046 avpriv_set_pts_info(st, 33, 1, 90000);
3047 st->last_IP_pts = AV_NOPTS_VALUE;
3048 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3049 st->pts_buffer[i]= AV_NOPTS_VALUE;
3050 st->reference_dts = AV_NOPTS_VALUE;
3052 st->sample_aspect_ratio = (AVRational){0,1};
3054 s->streams[s->nb_streams++] = st;
3058 AVProgram *av_new_program(AVFormatContext *ac, int id)
3060 AVProgram *program=NULL;
3063 av_dlog(ac, "new_program: id=0x%04x\n", id);
3065 for(i=0; i<ac->nb_programs; i++)
3066 if(ac->programs[i]->id == id)
3067 program = ac->programs[i];
3070 program = av_mallocz(sizeof(AVProgram));
3073 dynarray_add(&ac->programs, &ac->nb_programs, program);
3074 program->discard = AVDISCARD_NONE;
3081 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3083 AVChapter *chapter = NULL;
3086 for(i=0; i<s->nb_chapters; i++)
3087 if(s->chapters[i]->id == id)
3088 chapter = s->chapters[i];
3091 chapter= av_mallocz(sizeof(AVChapter));
3094 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3096 av_dict_set(&chapter->metadata, "title", title, 0);
3098 chapter->time_base= time_base;
3099 chapter->start = start;
3105 /************************************************************/
3106 /* output media file */
3108 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
3109 const char *format, const char *filename)
3111 AVFormatContext *s = avformat_alloc_context();
3120 oformat = av_guess_format(format, NULL, NULL);
3122 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
3123 ret = AVERROR(EINVAL);
3127 oformat = av_guess_format(NULL, filename, NULL);
3129 ret = AVERROR(EINVAL);
3130 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
3137 s->oformat = oformat;
3138 if (s->oformat->priv_data_size > 0) {
3139 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3142 if (s->oformat->priv_class) {
3143 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3144 av_opt_set_defaults(s->priv_data);
3147 s->priv_data = NULL;
3150 av_strlcpy(s->filename, filename, sizeof(s->filename));
3154 av_log(s, AV_LOG_ERROR, "Out of memory\n");
3155 ret = AVERROR(ENOMEM);
3157 avformat_free_context(s);
3161 #if FF_API_ALLOC_OUTPUT_CONTEXT
3162 AVFormatContext *avformat_alloc_output_context(const char *format,
3163 AVOutputFormat *oformat, const char *filename)
3165 AVFormatContext *avctx;
3166 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
3167 return ret < 0 ? NULL : avctx;
3171 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
3173 const AVCodecTag *avctag;
3175 enum CodecID id = CODEC_ID_NONE;
3176 unsigned int tag = 0;
3179 * Check that tag + id is in the table
3180 * If neither is in the table -> OK
3181 * If tag is in the table with another id -> FAIL
3182 * If id is in the table with another tag -> FAIL unless strict < normal
3184 for (n = 0; s->oformat->codec_tag[n]; n++) {
3185 avctag = s->oformat->codec_tag[n];
3186 while (avctag->id != CODEC_ID_NONE) {
3187 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
3189 if (id == st->codec->codec_id)
3192 if (avctag->id == st->codec->codec_id)
3197 if (id != CODEC_ID_NONE)
3199 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
3204 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
3208 AVDictionary *tmp = NULL;
3211 av_dict_copy(&tmp, *options, 0);
3212 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
3214 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
3215 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3218 // some sanity checks
3219 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
3220 av_log(s, AV_LOG_ERROR, "no streams\n");
3221 ret = AVERROR(EINVAL);
3225 for(i=0;i<s->nb_streams;i++) {
3228 switch (st->codec->codec_type) {
3229 case AVMEDIA_TYPE_AUDIO:
3230 if(st->codec->sample_rate<=0){
3231 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
3232 ret = AVERROR(EINVAL);
3235 if(!st->codec->block_align)
3236 st->codec->block_align = st->codec->channels *
3237 av_get_bits_per_sample(st->codec->codec_id) >> 3;
3239 case AVMEDIA_TYPE_VIDEO:
3240 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
3241 av_log(s, AV_LOG_ERROR, "time base not set\n");
3242 ret = AVERROR(EINVAL);
3245 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
3246 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
3247 ret = AVERROR(EINVAL);
3250 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
3251 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
3253 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
3254 "(%d/%d) and encoder layer (%d/%d)\n",
3255 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3256 st->codec->sample_aspect_ratio.num,
3257 st->codec->sample_aspect_ratio.den);
3258 ret = AVERROR(EINVAL);
3264 if(s->oformat->codec_tag){
3265 if( st->codec->codec_tag
3266 && st->codec->codec_id == CODEC_ID_RAWVIDEO
3267 && (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', ' '))
3268 && !validate_codec_tag(s, st)){
3269 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi/mov, we override it here
3270 st->codec->codec_tag= 0;
3272 if(st->codec->codec_tag){
3273 if (!validate_codec_tag(s, st)) {
3274 char tagbuf[32], cortag[32];
3275 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3276 av_get_codec_tag_string(cortag, sizeof(cortag), av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id));
3277 av_log(s, AV_LOG_ERROR,
3278 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
3279 tagbuf, st->codec->codec_tag, st->codec->codec_id, cortag);
3280 ret = AVERROR_INVALIDDATA;
3284 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3287 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3288 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3289 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3292 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3293 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3294 if (!s->priv_data) {
3295 ret = AVERROR(ENOMEM);
3298 if (s->oformat->priv_class) {
3299 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3300 av_opt_set_defaults(s->priv_data);
3301 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3306 /* set muxer identification string */
3307 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3308 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3311 if(s->oformat->write_header){
3312 ret = s->oformat->write_header(s);
3317 /* init PTS generation */
3318 for(i=0;i<s->nb_streams;i++) {
3319 int64_t den = AV_NOPTS_VALUE;
3322 switch (st->codec->codec_type) {
3323 case AVMEDIA_TYPE_AUDIO:
3324 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3326 case AVMEDIA_TYPE_VIDEO:
3327 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3332 if (den != AV_NOPTS_VALUE) {
3334 ret = AVERROR_INVALIDDATA;
3337 frac_init(&st->pts, 0, 0, den);
3342 av_dict_free(options);
3351 //FIXME merge with compute_pkt_fields
3352 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3353 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3354 int num, den, frame_size, i;
3356 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
3357 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
3359 /* duration field */
3360 if (pkt->duration == 0) {
3361 compute_frame_duration(&num, &den, st, NULL, pkt);
3363 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3367 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3370 //XXX/FIXME this is a temporary hack until all encoders output pts
3371 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3374 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
3378 // pkt->pts= st->cur_dts;
3379 pkt->pts= st->pts.val;
3382 //calculate dts from pts
3383 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3384 st->pts_buffer[0]= pkt->pts;
3385 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3386 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3387 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3388 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3390 pkt->dts= st->pts_buffer[0];
3393 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
3394 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
3395 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
3396 av_log(s, AV_LOG_ERROR,
3397 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
3398 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
3399 return AVERROR(EINVAL);
3401 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3402 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
3403 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
3404 return AVERROR(EINVAL);
3407 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n", av_ts2str(pkt->pts), av_ts2str(pkt->dts));
3408 st->cur_dts= pkt->dts;
3409 st->pts.val= pkt->dts;
3412 switch (st->codec->codec_type) {
3413 case AVMEDIA_TYPE_AUDIO:
3414 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
3416 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3417 likely equal to the encoder delay, but it would be better if we
3418 had the real timestamps from the encoder */
3419 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3420 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3423 case AVMEDIA_TYPE_VIDEO:
3424 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3432 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3437 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3438 return s->oformat->write_packet(s, pkt);
3442 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3444 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3447 ret= s->oformat->write_packet(s, pkt);
3450 s->streams[pkt->stream_index]->nb_frames++;
3454 #define CHUNK_START 0x1000
3456 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3457 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3459 AVPacketList **next_point, *this_pktl;
3460 AVStream *st= s->streams[pkt->stream_index];
3461 int chunked= s->max_chunk_size || s->max_chunk_duration;
3463 this_pktl = av_mallocz(sizeof(AVPacketList));
3465 return AVERROR(ENOMEM);
3466 this_pktl->pkt= *pkt;
3467 pkt->destruct= NULL; // do not free original but only the copy
3468 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3470 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3471 next_point = &(st->last_in_packet_buffer->next);
3473 next_point = &s->packet_buffer;
3478 uint64_t max= av_rescale_q(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base);
3479 if( st->interleaver_chunk_size + pkt->size <= s->max_chunk_size-1U
3480 && st->interleaver_chunk_duration + pkt->duration <= max-1U){
3481 st->interleaver_chunk_size += pkt->size;
3482 st->interleaver_chunk_duration += pkt->duration;
3485 st->interleaver_chunk_size =
3486 st->interleaver_chunk_duration = 0;
3487 this_pktl->pkt.flags |= CHUNK_START;
3491 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3493 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
3494 || !compare(s, &(*next_point)->pkt, pkt))){
3495 next_point= &(*next_point)->next;
3500 next_point = &(s->packet_buffer_end->next);
3503 assert(!*next_point);
3505 s->packet_buffer_end= this_pktl;
3508 this_pktl->next= *next_point;
3510 s->streams[pkt->stream_index]->last_in_packet_buffer=
3511 *next_point= this_pktl;
3515 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3517 AVStream *st = s->streams[ pkt ->stream_index];
3518 AVStream *st2= s->streams[ next->stream_index];
3519 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3521 if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
3522 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);
3523 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);
3525 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
3526 -( 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;
3529 comp= (ts>ts2) - (ts<ts2);
3533 return pkt->stream_index < next->stream_index;
3537 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3538 AVPacket *pkt, int flush)
3541 int stream_count=0, noninterleaved_count=0;
3542 int64_t delta_dts_max = 0;
3546 ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3551 for(i=0; i < s->nb_streams; i++) {
3552 if (s->streams[i]->last_in_packet_buffer) {
3554 } else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3555 ++noninterleaved_count;
3559 if (s->nb_streams == stream_count) {
3562 for(i=0; i < s->nb_streams; i++) {
3563 if (s->streams[i]->last_in_packet_buffer) {
3565 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
3566 s->streams[i]->time_base,
3568 av_rescale_q(s->packet_buffer->pkt.dts,
3569 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
3571 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
3574 if(s->nb_streams == stream_count+noninterleaved_count &&
3575 delta_dts_max > 20*AV_TIME_BASE) {
3576 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
3580 if(stream_count && flush){
3581 pktl= s->packet_buffer;
3584 s->packet_buffer= pktl->next;
3585 if(!s->packet_buffer)
3586 s->packet_buffer_end= NULL;
3588 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3589 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3593 av_init_packet(out);
3598 #if FF_API_INTERLEAVE_PACKET
3599 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3600 AVPacket *pkt, int flush)
3602 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3607 * Interleave an AVPacket correctly so it can be muxed.
3608 * @param out the interleaved packet will be output here
3609 * @param in the input packet
3610 * @param flush 1 if no further packets are available as input and all
3611 * remaining packets should be output
3612 * @return 1 if a packet was output, 0 if no packet could be output,
3613 * < 0 if an error occurred
3615 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3616 if (s->oformat->interleave_packet) {
3617 int ret = s->oformat->interleave_packet(s, out, in, flush);
3622 return ff_interleave_packet_per_dts(s, out, in, flush);
3625 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3629 AVStream *st= s->streams[ pkt->stream_index];
3631 //FIXME/XXX/HACK drop zero sized packets
3632 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3635 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
3636 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
3637 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3640 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3641 return AVERROR(EINVAL);
3643 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3649 int ret= interleave_packet(s, &opkt, pkt, flush);
3650 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3653 ret= s->oformat->write_packet(s, &opkt);
3655 s->streams[opkt.stream_index]->nb_frames++;
3657 av_free_packet(&opkt);
3662 if(s->pb && s->pb->error)
3663 return s->pb->error;
3667 int av_write_trailer(AVFormatContext *s)
3673 ret= interleave_packet(s, &pkt, NULL, 1);
3674 if(ret<0) //FIXME cleanup needed for ret<0 ?
3679 ret= s->oformat->write_packet(s, &pkt);
3681 s->streams[pkt.stream_index]->nb_frames++;
3683 av_free_packet(&pkt);
3687 if(s->pb && s->pb->error)
3691 if(s->oformat->write_trailer)
3692 ret = s->oformat->write_trailer(s);
3697 ret = s->pb ? s->pb->error : 0;
3698 for(i=0;i<s->nb_streams;i++) {
3699 av_freep(&s->streams[i]->priv_data);
3700 av_freep(&s->streams[i]->index_entries);
3702 if (s->oformat->priv_class)
3703 av_opt_free(s->priv_data);
3704 av_freep(&s->priv_data);
3708 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3709 int64_t *dts, int64_t *wall)
3711 if (!s->oformat || !s->oformat->get_output_timestamp)
3712 return AVERROR(ENOSYS);
3713 s->oformat->get_output_timestamp(s, stream, dts, wall);
3717 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3720 AVProgram *program=NULL;
3723 if (idx >= ac->nb_streams) {
3724 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3728 for(i=0; i<ac->nb_programs; i++){
3729 if(ac->programs[i]->id != progid)
3731 program = ac->programs[i];
3732 for(j=0; j<program->nb_stream_indexes; j++)
3733 if(program->stream_index[j] == idx)
3736 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3739 program->stream_index = tmp;
3740 program->stream_index[program->nb_stream_indexes++] = idx;
3745 static void print_fps(double d, const char *postfix){
3746 uint64_t v= lrintf(d*100);
3747 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3748 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3749 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3752 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3754 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3755 AVDictionaryEntry *tag=NULL;
3757 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3758 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3759 if(strcmp("language", tag->key)){
3760 const char *p = tag->value;
3761 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3764 size_t len = strcspn(p, "\xd\xa");
3765 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3766 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3768 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3769 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3772 av_log(ctx, AV_LOG_INFO, "\n");
3778 /* "user interface" functions */
3779 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3782 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3783 AVStream *st = ic->streams[i];
3784 int g = av_gcd(st->time_base.num, st->time_base.den);
3785 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3786 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3787 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3788 /* the pid is an important information, so we display it */
3789 /* XXX: add a generic system */
3790 if (flags & AVFMT_SHOW_IDS)
3791 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3793 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3794 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3795 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3796 if (st->sample_aspect_ratio.num && // default
3797 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3798 AVRational display_aspect_ratio;
3799 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3800 st->codec->width*st->sample_aspect_ratio.num,
3801 st->codec->height*st->sample_aspect_ratio.den,
3803 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3804 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3805 display_aspect_ratio.num, display_aspect_ratio.den);
3807 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3808 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3809 print_fps(av_q2d(st->avg_frame_rate), "fps");
3810 if(st->r_frame_rate.den && st->r_frame_rate.num)
3811 print_fps(av_q2d(st->r_frame_rate), "tbr");
3812 if(st->time_base.den && st->time_base.num)
3813 print_fps(1/av_q2d(st->time_base), "tbn");
3814 if(st->codec->time_base.den && st->codec->time_base.num)
3815 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3817 if (st->disposition & AV_DISPOSITION_DEFAULT)
3818 av_log(NULL, AV_LOG_INFO, " (default)");
3819 if (st->disposition & AV_DISPOSITION_DUB)
3820 av_log(NULL, AV_LOG_INFO, " (dub)");
3821 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3822 av_log(NULL, AV_LOG_INFO, " (original)");
3823 if (st->disposition & AV_DISPOSITION_COMMENT)
3824 av_log(NULL, AV_LOG_INFO, " (comment)");
3825 if (st->disposition & AV_DISPOSITION_LYRICS)
3826 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3827 if (st->disposition & AV_DISPOSITION_KARAOKE)
3828 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3829 if (st->disposition & AV_DISPOSITION_FORCED)
3830 av_log(NULL, AV_LOG_INFO, " (forced)");
3831 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3832 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3833 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3834 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3835 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3836 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3837 av_log(NULL, AV_LOG_INFO, "\n");
3838 dump_metadata(NULL, st->metadata, " ");
3841 void av_dump_format(AVFormatContext *ic,
3847 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3848 if (ic->nb_streams && !printed)
3851 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3852 is_output ? "Output" : "Input",
3854 is_output ? ic->oformat->name : ic->iformat->name,
3855 is_output ? "to" : "from", url);
3856 dump_metadata(NULL, ic->metadata, " ");
3858 av_log(NULL, AV_LOG_INFO, " Duration: ");
3859 if (ic->duration != AV_NOPTS_VALUE) {
3860 int hours, mins, secs, us;
3861 secs = ic->duration / AV_TIME_BASE;
3862 us = ic->duration % AV_TIME_BASE;
3867 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3868 (100 * us) / AV_TIME_BASE);
3870 av_log(NULL, AV_LOG_INFO, "N/A");
3872 if (ic->start_time != AV_NOPTS_VALUE) {
3874 av_log(NULL, AV_LOG_INFO, ", start: ");
3875 secs = ic->start_time / AV_TIME_BASE;
3876 us = abs(ic->start_time % AV_TIME_BASE);
3877 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3878 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3880 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3882 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3884 av_log(NULL, AV_LOG_INFO, "N/A");
3886 av_log(NULL, AV_LOG_INFO, "\n");
3888 for (i = 0; i < ic->nb_chapters; i++) {
3889 AVChapter *ch = ic->chapters[i];
3890 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3891 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3892 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3894 dump_metadata(NULL, ch->metadata, " ");
3896 if(ic->nb_programs) {
3897 int j, k, total = 0;
3898 for(j=0; j<ic->nb_programs; j++) {
3899 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3901 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3902 name ? name->value : "");
3903 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3904 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3905 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3906 printed[ic->programs[j]->stream_index[k]] = 1;
3908 total += ic->programs[j]->nb_stream_indexes;
3910 if (total < ic->nb_streams)
3911 av_log(NULL, AV_LOG_INFO, " No Program\n");
3913 for(i=0;i<ic->nb_streams;i++)
3915 dump_stream_format(ic, i, index, is_output);
3920 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3921 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3923 return av_gettime();
3927 uint64_t ff_ntp_time(void)
3929 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3932 int av_get_frame_filename(char *buf, int buf_size,
3933 const char *path, int number)
3936 char *q, buf1[20], c;
3937 int nd, len, percentd_found;
3949 while (isdigit(*p)) {
3950 nd = nd * 10 + *p++ - '0';
3953 } while (isdigit(c));
3962 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3964 if ((q - buf + len) > buf_size - 1)
3966 memcpy(q, buf1, len);
3974 if ((q - buf) < buf_size - 1)
3978 if (!percentd_found)
3987 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3991 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3993 for(i=0;i<size;i+=16) {
4000 PRINT(" %02x", buf[i+j]);
4005 for(j=0;j<len;j++) {
4007 if (c < ' ' || c > '~')
4016 void av_hex_dump(FILE *f, uint8_t *buf, int size)
4018 hex_dump_internal(NULL, f, 0, buf, size);
4021 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
4023 hex_dump_internal(avcl, NULL, level, buf, size);
4026 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
4029 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
4030 PRINT("stream #%d:\n", pkt->stream_index);
4031 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
4032 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4033 /* DTS is _always_ valid after av_read_frame() */
4035 if (pkt->dts == AV_NOPTS_VALUE)
4038 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4039 /* PTS may not be known if B-frames are present. */
4041 if (pkt->pts == AV_NOPTS_VALUE)
4044 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4046 PRINT(" size=%d\n", pkt->size);
4049 av_hex_dump(f, pkt->data, pkt->size);
4053 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
4055 AVRational tb = { 1, AV_TIME_BASE };
4056 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
4060 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
4062 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4066 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
4068 AVRational tb = { 1, AV_TIME_BASE };
4069 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
4073 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
4076 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4079 void av_url_split(char *proto, int proto_size,
4080 char *authorization, int authorization_size,
4081 char *hostname, int hostname_size,
4083 char *path, int path_size,
4086 const char *p, *ls, *ls2, *at, *col, *brk;
4088 if (port_ptr) *port_ptr = -1;
4089 if (proto_size > 0) proto[0] = 0;
4090 if (authorization_size > 0) authorization[0] = 0;
4091 if (hostname_size > 0) hostname[0] = 0;
4092 if (path_size > 0) path[0] = 0;
4094 /* parse protocol */
4095 if ((p = strchr(url, ':'))) {
4096 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4101 /* no protocol means plain filename */
4102 av_strlcpy(path, url, path_size);
4106 /* separate path from hostname */
4107 ls = strchr(p, '/');
4108 ls2 = strchr(p, '?');
4112 ls = FFMIN(ls, ls2);
4114 av_strlcpy(path, ls, path_size);
4116 ls = &p[strlen(p)]; // XXX
4118 /* the rest is hostname, use that to parse auth/port */
4120 /* authorization (user[:pass]@hostname) */
4121 if ((at = strchr(p, '@')) && at < ls) {
4122 av_strlcpy(authorization, p,
4123 FFMIN(authorization_size, at + 1 - p));
4124 p = at + 1; /* skip '@' */
4127 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4129 av_strlcpy(hostname, p + 1,
4130 FFMIN(hostname_size, brk - p));
4131 if (brk[1] == ':' && port_ptr)
4132 *port_ptr = atoi(brk + 2);
4133 } else if ((col = strchr(p, ':')) && col < ls) {
4134 av_strlcpy(hostname, p,
4135 FFMIN(col + 1 - p, hostname_size));
4136 if (port_ptr) *port_ptr = atoi(col + 1);
4138 av_strlcpy(hostname, p,
4139 FFMIN(ls + 1 - p, hostname_size));
4143 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4146 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4149 'C', 'D', 'E', 'F' };
4150 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4153 'c', 'd', 'e', 'f' };
4154 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4156 for(i = 0; i < s; i++) {
4157 buff[i * 2] = hex_table[src[i] >> 4];
4158 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4164 int ff_hex_to_data(uint8_t *data, const char *p)
4171 p += strspn(p, SPACE_CHARS);
4174 c = toupper((unsigned char) *p++);
4175 if (c >= '0' && c <= '9')
4177 else if (c >= 'A' && c <= 'F')
4192 #if FF_API_SET_PTS_INFO
4193 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4194 unsigned int pts_num, unsigned int pts_den)
4196 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4200 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4201 unsigned int pts_num, unsigned int pts_den)
4204 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
4205 if(new_tb.num != pts_num)
4206 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
4208 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
4210 if(new_tb.num <= 0 || new_tb.den <= 0) {
4211 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);
4214 s->time_base = new_tb;
4215 av_codec_set_pkt_timebase(s->codec, new_tb);
4216 s->pts_wrap_bits = pts_wrap_bits;
4219 int ff_url_join(char *str, int size, const char *proto,
4220 const char *authorization, const char *hostname,
4221 int port, const char *fmt, ...)
4224 struct addrinfo hints = { 0 }, *ai;
4229 av_strlcatf(str, size, "%s://", proto);
4230 if (authorization && authorization[0])
4231 av_strlcatf(str, size, "%s@", authorization);
4232 #if CONFIG_NETWORK && defined(AF_INET6)
4233 /* Determine if hostname is a numerical IPv6 address,
4234 * properly escape it within [] in that case. */
4235 hints.ai_flags = AI_NUMERICHOST;
4236 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
4237 if (ai->ai_family == AF_INET6) {
4238 av_strlcat(str, "[", size);
4239 av_strlcat(str, hostname, size);
4240 av_strlcat(str, "]", size);
4242 av_strlcat(str, hostname, size);
4247 /* Not an IPv6 address, just output the plain string. */
4248 av_strlcat(str, hostname, size);
4251 av_strlcatf(str, size, ":%d", port);
4254 int len = strlen(str);
4257 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
4263 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
4264 AVFormatContext *src)
4269 local_pkt.stream_index = dst_stream;
4270 if (pkt->pts != AV_NOPTS_VALUE)
4271 local_pkt.pts = av_rescale_q(pkt->pts,
4272 src->streams[pkt->stream_index]->time_base,
4273 dst->streams[dst_stream]->time_base);
4274 if (pkt->dts != AV_NOPTS_VALUE)
4275 local_pkt.dts = av_rescale_q(pkt->dts,
4276 src->streams[pkt->stream_index]->time_base,
4277 dst->streams[dst_stream]->time_base);
4278 return av_write_frame(dst, &local_pkt);
4281 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4284 const char *ptr = str;
4286 /* Parse key=value pairs. */
4289 char *dest = NULL, *dest_end;
4290 int key_len, dest_len = 0;
4292 /* Skip whitespace and potential commas. */
4293 while (*ptr && (isspace(*ptr) || *ptr == ','))
4300 if (!(ptr = strchr(key, '=')))
4303 key_len = ptr - key;
4305 callback_get_buf(context, key, key_len, &dest, &dest_len);
4306 dest_end = dest + dest_len - 1;
4310 while (*ptr && *ptr != '\"') {
4314 if (dest && dest < dest_end)
4318 if (dest && dest < dest_end)
4326 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
4327 if (dest && dest < dest_end)
4335 int ff_find_stream_index(AVFormatContext *s, int id)
4338 for (i = 0; i < s->nb_streams; i++) {
4339 if (s->streams[i]->id == id)
4345 void ff_make_absolute_url(char *buf, int size, const char *base,
4349 /* Absolute path, relative to the current server */
4350 if (base && strstr(base, "://") && rel[0] == '/') {
4352 av_strlcpy(buf, base, size);
4353 sep = strstr(buf, "://");
4356 sep = strchr(sep, '/');
4360 av_strlcat(buf, rel, size);
4363 /* If rel actually is an absolute url, just copy it */
4364 if (!base || strstr(rel, "://") || rel[0] == '/') {
4365 av_strlcpy(buf, rel, size);
4369 av_strlcpy(buf, base, size);
4370 /* Remove the file name from the base url */
4371 sep = strrchr(buf, '/');
4376 while (av_strstart(rel, "../", NULL) && sep) {
4377 /* Remove the path delimiter at the end */
4379 sep = strrchr(buf, '/');
4380 /* If the next directory name to pop off is "..", break here */
4381 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4382 /* Readd the slash we just removed */
4383 av_strlcat(buf, "/", size);
4386 /* Cut off the directory name */
4393 av_strlcat(buf, rel, size);
4396 int64_t ff_iso8601_to_unix_time(const char *datestr)
4399 struct tm time1 = {0}, time2 = {0};
4401 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
4402 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
4404 return av_timegm(&time2);
4406 return av_timegm(&time1);
4408 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4409 "the date string.\n");
4414 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
4417 if (ofmt->query_codec)
4418 return ofmt->query_codec(codec_id, std_compliance);
4419 else if (ofmt->codec_tag)
4420 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4421 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4422 codec_id == ofmt->subtitle_codec)
4425 return AVERROR_PATCHWELCOME;
4428 int avformat_network_init(void)
4432 ff_network_inited_globally = 1;
4433 if ((ret = ff_network_init()) < 0)
4440 int avformat_network_deinit(void)
4449 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4450 uint64_t channel_layout, int32_t sample_rate,
4451 int32_t width, int32_t height)
4457 return AVERROR(EINVAL);
4460 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4462 if (channel_layout) {
4464 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4468 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4470 if (width || height) {
4472 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4474 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4476 return AVERROR(ENOMEM);
4477 bytestream_put_le32(&data, flags);
4479 bytestream_put_le32(&data, channels);
4481 bytestream_put_le64(&data, channel_layout);
4483 bytestream_put_le32(&data, sample_rate);
4484 if (width || height) {
4485 bytestream_put_le32(&data, width);
4486 bytestream_put_le32(&data, height);
4491 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4493 return ff_codec_bmp_tags;
4495 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4497 return ff_codec_wav_tags;
4500 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4502 AVRational undef = {0, 1};
4503 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4504 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4505 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4507 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4508 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4509 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4510 stream_sample_aspect_ratio = undef;
4512 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4513 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4514 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4515 frame_sample_aspect_ratio = undef;
4517 if (stream_sample_aspect_ratio.num)
4518 return stream_sample_aspect_ratio;
4520 return frame_sample_aspect_ratio;
4523 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4526 if (*spec <= '9' && *spec >= '0') /* opt:index */
4527 return strtol(spec, NULL, 0) == st->index;
4528 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4529 *spec == 't') { /* opt:[vasdt] */
4530 enum AVMediaType type;
4533 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4534 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4535 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4536 case 'd': type = AVMEDIA_TYPE_DATA; break;
4537 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4538 default: av_assert0(0);
4540 if (type != st->codec->codec_type)
4542 if (*spec++ == ':') { /* possibly followed by :index */
4543 int i, index = strtol(spec, NULL, 0);
4544 for (i = 0; i < s->nb_streams; i++)
4545 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4546 return i == st->index;
4550 } else if (*spec == 'p' && *(spec + 1) == ':') {
4554 prog_id = strtol(spec, &endptr, 0);
4555 for (i = 0; i < s->nb_programs; i++) {
4556 if (s->programs[i]->id != prog_id)
4559 if (*endptr++ == ':') {
4560 int stream_idx = strtol(endptr, NULL, 0);
4561 return stream_idx >= 0 &&
4562 stream_idx < s->programs[i]->nb_stream_indexes &&
4563 st->index == s->programs[i]->stream_index[stream_idx];
4566 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4567 if (st->index == s->programs[i]->stream_index[j])
4571 } else if (*spec == '#') {
4574 sid = strtol(spec + 1, &endptr, 0);
4576 return st->id == sid;
4577 } else if (!*spec) /* empty specifier, matches everything */
4580 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4581 return AVERROR(EINVAL);