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 "libavutil/opt.h"
32 #include "libavutil/avstring.h"
34 #include "audiointerleave.h"
49 * various utility functions for use within FFmpeg
52 unsigned avformat_version(void)
54 return LIBAVFORMAT_VERSION_INT;
57 const char *avformat_configuration(void)
59 return FFMPEG_CONFIGURATION;
62 const char *avformat_license(void)
64 #define LICENSE_PREFIX "libavformat license: "
65 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
68 /* fraction handling */
71 * f = val + (num / den) + 0.5.
73 * 'num' is normalized so that it is such as 0 <= num < den.
75 * @param f fractional number
76 * @param val integer value
77 * @param num must be >= 0
78 * @param den must be >= 1
80 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
93 * Fractional addition to f: f = f + (incr / f->den).
95 * @param f fractional number
96 * @param incr increment, can be positive or negative
98 static void av_frac_add(AVFrac *f, int64_t incr)
111 } else if (num >= den) {
118 /** head of registered input format linked list */
119 static AVInputFormat *first_iformat = NULL;
120 /** head of registered output format linked list */
121 static AVOutputFormat *first_oformat = NULL;
123 AVInputFormat *av_iformat_next(AVInputFormat *f)
125 if(f) return f->next;
126 else return first_iformat;
129 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
131 if(f) return f->next;
132 else return first_oformat;
135 void av_register_input_format(AVInputFormat *format)
139 while (*p != NULL) p = &(*p)->next;
144 void av_register_output_format(AVOutputFormat *format)
148 while (*p != NULL) p = &(*p)->next;
153 int av_match_ext(const char *filename, const char *extensions)
161 ext = strrchr(filename, '.');
167 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
170 if (!strcasecmp(ext1, ext))
180 static int match_format(const char *name, const char *names)
188 namelen = strlen(name);
189 while ((p = strchr(names, ','))) {
190 len = FFMAX(p - names, namelen);
191 if (!strncasecmp(name, names, len))
195 return !strcasecmp(name, names);
198 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
199 const char *mime_type)
201 AVOutputFormat *fmt = NULL, *fmt_found;
202 int score_max, score;
204 /* specific test for image sequences */
205 #if CONFIG_IMAGE2_MUXER
206 if (!short_name && filename &&
207 av_filename_number_test(filename) &&
208 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
209 return av_guess_format("image2", NULL, NULL);
212 /* Find the proper file type. */
215 while ((fmt = av_oformat_next(fmt))) {
217 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
219 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
221 if (filename && fmt->extensions &&
222 av_match_ext(filename, fmt->extensions)) {
225 if (score > score_max) {
233 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
234 const char *filename, const char *mime_type, enum AVMediaType type){
235 if(type == AVMEDIA_TYPE_VIDEO){
236 enum CodecID codec_id= CODEC_ID_NONE;
238 #if CONFIG_IMAGE2_MUXER
239 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
240 codec_id= ff_guess_image2_codec(filename);
243 if(codec_id == CODEC_ID_NONE)
244 codec_id= fmt->video_codec;
246 }else if(type == AVMEDIA_TYPE_AUDIO)
247 return fmt->audio_codec;
248 else if (type == AVMEDIA_TYPE_SUBTITLE)
249 return fmt->subtitle_codec;
251 return CODEC_ID_NONE;
254 AVInputFormat *av_find_input_format(const char *short_name)
256 AVInputFormat *fmt = NULL;
257 while ((fmt = av_iformat_next(fmt))) {
258 if (match_format(short_name, fmt->name))
265 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
267 int ret= av_new_packet(pkt, size);
272 pkt->pos= avio_tell(s);
274 ret= avio_read(s, pkt->data, size);
278 av_shrink_packet(pkt, ret);
283 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
288 return av_get_packet(s, pkt, size);
289 old_size = pkt->size;
290 ret = av_grow_packet(pkt, size);
293 ret = avio_read(s, pkt->data + old_size, size);
294 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
299 int av_filename_number_test(const char *filename)
302 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
305 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
307 AVProbeData lpd = *pd;
308 AVInputFormat *fmt1 = NULL, *fmt;
309 int score, score_max=0;
311 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
312 int id3len = ff_id3v2_tag_len(lpd.buf);
313 if (lpd.buf_size > id3len + 16) {
315 lpd.buf_size -= id3len;
320 while ((fmt1 = av_iformat_next(fmt1))) {
321 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
324 if (fmt1->read_probe) {
325 score = fmt1->read_probe(&lpd);
326 if(!score && fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
328 } else if (fmt1->extensions) {
329 if (av_match_ext(lpd.filename, fmt1->extensions)) {
333 if (score > score_max) {
336 }else if (score == score_max)
339 *score_ret= score_max;
343 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
346 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
347 if(score_ret > *score_max){
348 *score_max= score_ret;
354 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
356 return av_probe_input_format2(pd, is_opened, &score);
359 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
361 static const struct {
362 const char *name; enum CodecID id; enum AVMediaType type;
364 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
365 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
366 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
367 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
368 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
369 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
370 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
371 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
375 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
379 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
380 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
381 for (i = 0; fmt_id_type[i].name; i++) {
382 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
383 st->codec->codec_id = fmt_id_type[i].id;
384 st->codec->codec_type = fmt_id_type[i].type;
392 /************************************************************/
393 /* input media file */
396 * Open a media file from an IO stream. 'fmt' must be specified.
398 int av_open_input_stream(AVFormatContext **ic_ptr,
399 AVIOContext *pb, const char *filename,
400 AVInputFormat *fmt, AVFormatParameters *ap)
404 AVFormatParameters default_ap;
408 memset(ap, 0, sizeof(default_ap));
411 if(!ap->prealloced_context)
412 ic = avformat_alloc_context();
416 err = AVERROR(ENOMEM);
421 ic->duration = AV_NOPTS_VALUE;
422 ic->start_time = AV_NOPTS_VALUE;
423 av_strlcpy(ic->filename, filename, sizeof(ic->filename));
425 /* allocate private data */
426 if (fmt->priv_data_size > 0) {
427 ic->priv_data = av_mallocz(fmt->priv_data_size);
428 if (!ic->priv_data) {
429 err = AVERROR(ENOMEM);
432 if (fmt->priv_class) {
433 *(const AVClass**)ic->priv_data= fmt->priv_class;
434 av_opt_set_defaults(ic->priv_data);
437 ic->priv_data = NULL;
440 // e.g. AVFMT_NOFILE formats will not have a AVIOContext
442 ff_id3v2_read(ic, ID3v2_DEFAULT_MAGIC);
444 if (!(ic->flags&AVFMT_FLAG_PRIV_OPT) && ic->iformat->read_header) {
445 err = ic->iformat->read_header(ic, ap);
450 if (!(ic->flags&AVFMT_FLAG_PRIV_OPT) && pb && !ic->data_offset)
451 ic->data_offset = avio_tell(ic->pb);
453 ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
460 av_freep(&ic->priv_data);
461 for(i=0;i<ic->nb_streams;i++) {
462 AVStream *st = ic->streams[i];
464 av_free(st->priv_data);
465 av_free(st->codec->extradata);
477 int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap){
480 if (ic->iformat->read_header) {
481 err = ic->iformat->read_header(ic, ap);
486 if (ic->pb && !ic->data_offset)
487 ic->data_offset = avio_tell(ic->pb);
493 /** size of probe buffer, for guessing file type from file contents */
494 #define PROBE_BUF_MIN 2048
495 #define PROBE_BUF_MAX (1<<20)
497 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
498 const char *filename, void *logctx,
499 unsigned int offset, unsigned int max_probe_size)
501 AVProbeData pd = { filename ? filename : "", NULL, -offset };
502 unsigned char *buf = NULL;
503 int ret = 0, probe_size;
505 if (!max_probe_size) {
506 max_probe_size = PROBE_BUF_MAX;
507 } else if (max_probe_size > PROBE_BUF_MAX) {
508 max_probe_size = PROBE_BUF_MAX;
509 } else if (max_probe_size < PROBE_BUF_MIN) {
510 return AVERROR(EINVAL);
513 if (offset >= max_probe_size) {
514 return AVERROR(EINVAL);
517 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0;
518 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
519 int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
520 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
522 if (probe_size < offset) {
526 /* read probe data */
527 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
528 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
529 /* fail if error was not end of file, otherwise, lower score */
530 if (ret != AVERROR_EOF) {
535 ret = 0; /* error was end of file, nothing read */
538 pd.buf = &buf[offset];
540 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
542 /* guess file format */
543 *fmt = av_probe_input_format2(&pd, 1, &score);
545 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
546 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
548 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
554 return AVERROR_INVALIDDATA;
557 /* rewind. reuse probe buffer to avoid seeking */
558 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
564 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
567 AVFormatParameters *ap)
570 AVProbeData probe_data, *pd = &probe_data;
571 AVIOContext *pb = NULL;
572 void *logctx= ap && ap->prealloced_context ? *ic_ptr : NULL;
576 pd->filename = filename;
581 /* guess format if no file can be opened */
582 fmt = av_probe_input_format(pd, 0);
585 /* Do not open file if the format does not need it. XXX: specific
586 hack needed to handle RTSP/TCP */
587 if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
588 /* if no file needed do not try to open one */
589 if ((err=avio_open(&pb, filename, AVIO_FLAG_READ)) < 0) {
593 ffio_set_buf_size(pb, buf_size);
595 if (!fmt && (err = av_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
600 /* if still no format found, error */
602 err = AVERROR_INVALIDDATA;
606 /* check filename in case an image number is expected */
607 if (fmt->flags & AVFMT_NEEDNUMBER) {
608 if (!av_filename_number_test(filename)) {
609 err = AVERROR(EINVAL);
613 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
621 if (ap && ap->prealloced_context)
628 /*******************************************************/
630 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
631 AVPacketList **plast_pktl){
632 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
637 (*plast_pktl)->next = pktl;
639 *packet_buffer = pktl;
641 /* add the packet in the buffered packet list */
647 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
653 AVPacketList *pktl = s->raw_packet_buffer;
657 if(s->streams[pkt->stream_index]->request_probe <= 0){
658 s->raw_packet_buffer = pktl->next;
659 s->raw_packet_buffer_remaining_size += pkt->size;
666 ret= s->iformat->read_packet(s, pkt);
668 if (!pktl || ret == AVERROR(EAGAIN))
670 for (i = 0; i < s->nb_streams; i++)
671 if(s->streams[i]->request_probe > 0)
672 s->streams[i]->request_probe = -1;
676 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
677 av_packet_merge_side_data(pkt);
678 st= s->streams[pkt->stream_index];
680 switch(st->codec->codec_type){
681 case AVMEDIA_TYPE_VIDEO:
682 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
684 case AVMEDIA_TYPE_AUDIO:
685 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
687 case AVMEDIA_TYPE_SUBTITLE:
688 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
692 if(!pktl && st->request_probe <= 0)
695 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
696 s->raw_packet_buffer_remaining_size -= pkt->size;
698 if(st->request_probe>0){
699 AVProbeData *pd = &st->probe_data;
701 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
704 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
705 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
706 pd->buf_size += pkt->size;
707 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
709 end= s->raw_packet_buffer_remaining_size <= 0
710 || st->probe_packets<=0;
712 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
713 int score= set_codec_from_probe_data(s, st, pd);
714 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
718 st->request_probe= -1;
719 if(st->codec->codec_id != CODEC_ID_NONE){
720 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
722 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
729 /**********************************************************/
732 * Get the number of samples of an audio frame. Return -1 on error.
734 static int get_audio_frame_size(AVCodecContext *enc, int size)
738 if(enc->codec_id == CODEC_ID_VORBIS)
741 if (enc->frame_size <= 1) {
742 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
744 if (bits_per_sample) {
745 if (enc->channels == 0)
747 frame_size = (size << 3) / (bits_per_sample * enc->channels);
749 /* used for example by ADPCM codecs */
750 if (enc->bit_rate == 0)
752 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
755 frame_size = enc->frame_size;
762 * Return the frame duration in seconds. Return 0 if not available.
764 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
765 AVCodecParserContext *pc, AVPacket *pkt)
771 switch(st->codec->codec_type) {
772 case AVMEDIA_TYPE_VIDEO:
773 if(st->time_base.num*1000LL > st->time_base.den){
774 *pnum = st->time_base.num;
775 *pden = st->time_base.den;
776 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
777 *pnum = st->codec->time_base.num;
778 *pden = st->codec->time_base.den;
779 if (pc && pc->repeat_pict) {
780 *pnum = (*pnum) * (1 + pc->repeat_pict);
782 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
783 //Thus if we have no parser in such case leave duration undefined.
784 if(st->codec->ticks_per_frame>1 && !pc){
789 case AVMEDIA_TYPE_AUDIO:
790 frame_size = get_audio_frame_size(st->codec, pkt->size);
791 if (frame_size <= 0 || st->codec->sample_rate <= 0)
794 *pden = st->codec->sample_rate;
801 static int is_intra_only(AVCodecContext *enc){
802 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
804 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
805 switch(enc->codec_id){
807 case CODEC_ID_MJPEGB:
809 case CODEC_ID_RAWVIDEO:
810 case CODEC_ID_DVVIDEO:
811 case CODEC_ID_HUFFYUV:
812 case CODEC_ID_FFVHUFF:
817 case CODEC_ID_JPEG2000:
825 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
826 int64_t dts, int64_t pts)
828 AVStream *st= s->streams[stream_index];
829 AVPacketList *pktl= s->packet_buffer;
831 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
834 st->first_dts= dts - st->cur_dts;
837 for(; pktl; pktl= pktl->next){
838 if(pktl->pkt.stream_index != stream_index)
840 //FIXME think more about this check
841 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
842 pktl->pkt.pts += st->first_dts;
844 if(pktl->pkt.dts != AV_NOPTS_VALUE)
845 pktl->pkt.dts += st->first_dts;
847 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
848 st->start_time= pktl->pkt.pts;
850 if (st->start_time == AV_NOPTS_VALUE)
851 st->start_time = pts;
854 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
856 AVPacketList *pktl= s->packet_buffer;
859 if(st->first_dts != AV_NOPTS_VALUE){
860 cur_dts= st->first_dts;
861 for(; pktl; pktl= pktl->next){
862 if(pktl->pkt.stream_index == pkt->stream_index){
863 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
865 cur_dts -= pkt->duration;
868 pktl= s->packet_buffer;
869 st->first_dts = cur_dts;
870 }else if(st->cur_dts)
873 for(; pktl; pktl= pktl->next){
874 if(pktl->pkt.stream_index != pkt->stream_index)
876 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
877 && !pktl->pkt.duration){
878 pktl->pkt.dts= cur_dts;
879 if(!st->codec->has_b_frames)
880 pktl->pkt.pts= cur_dts;
881 cur_dts += pkt->duration;
882 pktl->pkt.duration= pkt->duration;
886 if(st->first_dts == AV_NOPTS_VALUE)
887 st->cur_dts= cur_dts;
890 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
891 AVCodecParserContext *pc, AVPacket *pkt)
893 int num, den, presentation_delayed, delay, i;
896 if (s->flags & AVFMT_FLAG_NOFILLIN)
899 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
900 pkt->dts= AV_NOPTS_VALUE;
902 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
903 //FIXME Set low_delay = 0 when has_b_frames = 1
904 st->codec->has_b_frames = 1;
906 /* do we have a video B-frame ? */
907 delay= st->codec->has_b_frames;
908 presentation_delayed = 0;
910 // ignore delay caused by frame threading so that the mpeg2-without-dts
911 // warning will not trigger
912 if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
913 delay -= st->codec->thread_count-1;
915 /* XXX: need has_b_frame, but cannot get it if the codec is
918 pc && pc->pict_type != AV_PICTURE_TYPE_B)
919 presentation_delayed = 1;
921 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
922 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
923 pkt->dts -= 1LL<<st->pts_wrap_bits;
926 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
927 // we take the conservative approach and discard both
928 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
929 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
930 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
931 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
934 if (pkt->duration == 0) {
935 compute_frame_duration(&num, &den, st, pc, pkt);
937 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
939 if(pkt->duration != 0 && s->packet_buffer)
940 update_initial_durations(s, st, pkt);
944 /* correct timestamps with byte offset if demuxers only have timestamps
945 on packet boundaries */
946 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
947 /* this will estimate bitrate based on this frame's duration and size */
948 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
949 if(pkt->pts != AV_NOPTS_VALUE)
951 if(pkt->dts != AV_NOPTS_VALUE)
955 if (pc && pc->dts_sync_point >= 0) {
956 // we have synchronization info from the parser
957 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
959 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
960 if (pkt->dts != AV_NOPTS_VALUE) {
961 // got DTS from the stream, update reference timestamp
962 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
963 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
964 } else if (st->reference_dts != AV_NOPTS_VALUE) {
965 // compute DTS based on reference timestamp
966 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
967 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
969 if (pc->dts_sync_point > 0)
970 st->reference_dts = pkt->dts; // new reference
974 /* This may be redundant, but it should not hurt. */
975 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
976 presentation_delayed = 1;
978 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
979 /* interpolate PTS and DTS if they are not present */
980 //We skip H264 currently because delay and has_b_frames are not reliably set
981 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
982 if (presentation_delayed) {
983 /* DTS = decompression timestamp */
984 /* PTS = presentation timestamp */
985 if (pkt->dts == AV_NOPTS_VALUE)
986 pkt->dts = st->last_IP_pts;
987 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
988 if (pkt->dts == AV_NOPTS_VALUE)
989 pkt->dts = st->cur_dts;
991 /* this is tricky: the dts must be incremented by the duration
992 of the frame we are displaying, i.e. the last I- or P-frame */
993 if (st->last_IP_duration == 0)
994 st->last_IP_duration = pkt->duration;
995 if(pkt->dts != AV_NOPTS_VALUE)
996 st->cur_dts = pkt->dts + st->last_IP_duration;
997 st->last_IP_duration = pkt->duration;
998 st->last_IP_pts= pkt->pts;
999 /* cannot compute PTS if not present (we can compute it only
1000 by knowing the future */
1001 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1002 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1003 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1004 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1005 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1006 pkt->pts += pkt->duration;
1007 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
1011 /* presentation is not delayed : PTS and DTS are the same */
1012 if(pkt->pts == AV_NOPTS_VALUE)
1013 pkt->pts = pkt->dts;
1014 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1015 if(pkt->pts == AV_NOPTS_VALUE)
1016 pkt->pts = st->cur_dts;
1017 pkt->dts = pkt->pts;
1018 if(pkt->pts != AV_NOPTS_VALUE)
1019 st->cur_dts = pkt->pts + pkt->duration;
1023 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1024 st->pts_buffer[0]= pkt->pts;
1025 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1026 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1027 if(pkt->dts == AV_NOPTS_VALUE)
1028 pkt->dts= st->pts_buffer[0];
1029 if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1030 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1032 if(pkt->dts > st->cur_dts)
1033 st->cur_dts = pkt->dts;
1036 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
1039 if(is_intra_only(st->codec))
1040 pkt->flags |= AV_PKT_FLAG_KEY;
1043 /* keyframe computation */
1044 if (pc->key_frame == 1)
1045 pkt->flags |= AV_PKT_FLAG_KEY;
1046 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
1047 pkt->flags |= AV_PKT_FLAG_KEY;
1050 pkt->convergence_duration = pc->convergence_duration;
1054 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1059 av_init_packet(pkt);
1062 /* select current input stream component */
1065 if (!st->need_parsing || !st->parser) {
1066 /* no parsing needed: we just output the packet as is */
1067 /* raw data support */
1068 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1069 compute_pkt_fields(s, st, NULL, pkt);
1071 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1072 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1073 ff_reduce_index(s, st->index);
1074 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1077 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1078 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1079 st->cur_ptr, st->cur_len,
1080 st->cur_pkt.pts, st->cur_pkt.dts,
1082 st->cur_pkt.pts = AV_NOPTS_VALUE;
1083 st->cur_pkt.dts = AV_NOPTS_VALUE;
1084 /* increment read pointer */
1088 /* return packet if any */
1092 pkt->stream_index = st->index;
1093 pkt->pts = st->parser->pts;
1094 pkt->dts = st->parser->dts;
1095 pkt->pos = st->parser->pos;
1096 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1098 pkt->destruct= st->cur_pkt.destruct;
1099 st->cur_pkt.destruct= NULL;
1100 st->cur_pkt.data = NULL;
1101 assert(st->cur_len == 0);
1103 pkt->destruct = NULL;
1105 compute_pkt_fields(s, st, st->parser, pkt);
1107 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1108 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset;
1109 ff_reduce_index(s, st->index);
1110 av_add_index_entry(st, pos, pkt->dts,
1111 0, 0, AVINDEX_KEYFRAME);
1118 av_free_packet(&st->cur_pkt);
1123 /* read next packet */
1124 ret = av_read_packet(s, &cur_pkt);
1126 if (ret == AVERROR(EAGAIN))
1128 /* return the last frames, if any */
1129 for(i = 0; i < s->nb_streams; i++) {
1131 if (st->parser && st->need_parsing) {
1132 av_parser_parse2(st->parser, st->codec,
1133 &pkt->data, &pkt->size,
1135 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1141 /* no more packets: really terminate parsing */
1144 st = s->streams[cur_pkt.stream_index];
1145 st->cur_pkt= cur_pkt;
1147 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1148 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1149 st->cur_pkt.pts < st->cur_pkt.dts){
1150 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1151 st->cur_pkt.stream_index,
1155 // av_free_packet(&st->cur_pkt);
1159 if(s->debug & FF_FDEBUG_TS)
1160 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1161 st->cur_pkt.stream_index,
1165 st->cur_pkt.duration,
1169 st->cur_ptr = st->cur_pkt.data;
1170 st->cur_len = st->cur_pkt.size;
1171 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1172 st->parser = av_parser_init(st->codec->codec_id);
1174 /* no parser available: just output the raw packets */
1175 st->need_parsing = AVSTREAM_PARSE_NONE;
1176 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1177 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1178 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1179 st->parser->flags |= PARSER_FLAG_ONCE;
1184 if(s->debug & FF_FDEBUG_TS)
1185 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1196 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1200 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1203 pktl = s->packet_buffer;
1205 AVPacket *next_pkt= &pktl->pkt;
1207 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1208 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1209 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1210 if( pktl->pkt.stream_index == next_pkt->stream_index
1211 && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1212 && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1213 next_pkt->pts= pktl->pkt.dts;
1217 pktl = s->packet_buffer;
1220 if( next_pkt->pts != AV_NOPTS_VALUE
1221 || next_pkt->dts == AV_NOPTS_VALUE
1223 /* read packet from packet buffer, if there is data */
1225 s->packet_buffer = pktl->next;
1231 int ret= av_read_frame_internal(s, pkt);
1233 if(pktl && ret != AVERROR(EAGAIN)){
1240 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1241 &s->packet_buffer_end)) < 0)
1242 return AVERROR(ENOMEM);
1244 assert(!s->packet_buffer);
1245 return av_read_frame_internal(s, pkt);
1250 /* XXX: suppress the packet queue */
1251 static void flush_packet_queue(AVFormatContext *s)
1256 pktl = s->packet_buffer;
1259 s->packet_buffer = pktl->next;
1260 av_free_packet(&pktl->pkt);
1263 while(s->raw_packet_buffer){
1264 pktl = s->raw_packet_buffer;
1265 s->raw_packet_buffer = pktl->next;
1266 av_free_packet(&pktl->pkt);
1269 s->packet_buffer_end=
1270 s->raw_packet_buffer_end= NULL;
1271 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1274 /*******************************************************/
1277 int av_find_default_stream_index(AVFormatContext *s)
1279 int first_audio_index = -1;
1283 if (s->nb_streams <= 0)
1285 for(i = 0; i < s->nb_streams; i++) {
1287 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1290 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1291 first_audio_index = i;
1293 return first_audio_index >= 0 ? first_audio_index : 0;
1297 * Flush the frame reader.
1299 void ff_read_frame_flush(AVFormatContext *s)
1304 flush_packet_queue(s);
1308 /* for each stream, reset read state */
1309 for(i = 0; i < s->nb_streams; i++) {
1313 av_parser_close(st->parser);
1315 av_free_packet(&st->cur_pkt);
1317 st->last_IP_pts = AV_NOPTS_VALUE;
1318 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1319 st->reference_dts = AV_NOPTS_VALUE;
1324 st->probe_packets = MAX_PROBE_PACKETS;
1326 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1327 st->pts_buffer[j]= AV_NOPTS_VALUE;
1331 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1334 for(i = 0; i < s->nb_streams; i++) {
1335 AVStream *st = s->streams[i];
1337 st->cur_dts = av_rescale(timestamp,
1338 st->time_base.den * (int64_t)ref_st->time_base.num,
1339 st->time_base.num * (int64_t)ref_st->time_base.den);
1343 void ff_reduce_index(AVFormatContext *s, int stream_index)
1345 AVStream *st= s->streams[stream_index];
1346 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1348 if((unsigned)st->nb_index_entries >= max_entries){
1350 for(i=0; 2*i<st->nb_index_entries; i++)
1351 st->index_entries[i]= st->index_entries[2*i];
1352 st->nb_index_entries= i;
1356 int ff_add_index_entry(AVIndexEntry **index_entries,
1357 int *nb_index_entries,
1358 unsigned int *index_entries_allocated_size,
1359 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1361 AVIndexEntry *entries, *ie;
1364 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1367 entries = av_fast_realloc(*index_entries,
1368 index_entries_allocated_size,
1369 (*nb_index_entries + 1) *
1370 sizeof(AVIndexEntry));
1374 *index_entries= entries;
1376 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1379 index= (*nb_index_entries)++;
1380 ie= &entries[index];
1381 assert(index==0 || ie[-1].timestamp < timestamp);
1383 ie= &entries[index];
1384 if(ie->timestamp != timestamp){
1385 if(ie->timestamp <= timestamp)
1387 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1388 (*nb_index_entries)++;
1389 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1390 distance= ie->min_distance;
1394 ie->timestamp = timestamp;
1395 ie->min_distance= distance;
1402 int av_add_index_entry(AVStream *st,
1403 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1405 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1406 &st->index_entries_allocated_size, pos,
1407 timestamp, size, distance, flags);
1410 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1411 int64_t wanted_timestamp, int flags)
1419 //optimize appending index entries at the end
1420 if(b && entries[b-1].timestamp < wanted_timestamp)
1425 timestamp = entries[m].timestamp;
1426 if(timestamp >= wanted_timestamp)
1428 if(timestamp <= wanted_timestamp)
1431 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1433 if(!(flags & AVSEEK_FLAG_ANY)){
1434 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1435 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1444 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1447 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1448 wanted_timestamp, flags);
1453 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1454 AVInputFormat *avif= s->iformat;
1455 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1456 int64_t ts_min, ts_max, ts;
1461 if (stream_index < 0)
1465 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1469 ts_min= AV_NOPTS_VALUE;
1470 pos_limit= -1; //gcc falsely says it may be uninitialized
1472 st= s->streams[stream_index];
1473 if(st->index_entries){
1476 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()
1477 index= FFMAX(index, 0);
1478 e= &st->index_entries[index];
1480 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1482 ts_min= e->timestamp;
1484 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1491 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1492 assert(index < st->nb_index_entries);
1494 e= &st->index_entries[index];
1495 assert(e->timestamp >= target_ts);
1497 ts_max= e->timestamp;
1498 pos_limit= pos_max - e->min_distance;
1500 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1501 pos_max,pos_limit, ts_max);
1506 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1511 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1514 av_update_cur_dts(s, st, ts);
1519 int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){
1521 int64_t start_pos, filesize;
1525 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1528 if(ts_min == AV_NOPTS_VALUE){
1529 pos_min = s->data_offset;
1530 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1531 if (ts_min == AV_NOPTS_VALUE)
1535 if(ts_max == AV_NOPTS_VALUE){
1537 filesize = avio_size(s->pb);
1538 pos_max = filesize - 1;
1541 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1543 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1544 if (ts_max == AV_NOPTS_VALUE)
1548 int64_t tmp_pos= pos_max + 1;
1549 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1550 if(tmp_ts == AV_NOPTS_VALUE)
1554 if(tmp_pos >= filesize)
1560 if(ts_min > ts_max){
1562 }else if(ts_min == ts_max){
1567 while (pos_min < pos_limit) {
1569 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1573 assert(pos_limit <= pos_max);
1576 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1577 // interpolate position (better than dichotomy)
1578 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1579 + pos_min - approximate_keyframe_distance;
1580 }else if(no_change==1){
1581 // bisection, if interpolation failed to change min or max pos last time
1582 pos = (pos_min + pos_limit)>>1;
1584 /* linear search if bisection failed, can only happen if there
1585 are very few or no keyframes between min/max */
1590 else if(pos > pos_limit)
1594 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1600 av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1601 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit,
1602 start_pos, no_change);
1604 if(ts == AV_NOPTS_VALUE){
1605 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1608 assert(ts != AV_NOPTS_VALUE);
1609 if (target_ts <= ts) {
1610 pos_limit = start_pos - 1;
1614 if (target_ts >= ts) {
1620 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1621 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1624 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1626 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1627 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1628 pos, ts_min, target_ts, ts_max);
1634 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1635 int64_t pos_min, pos_max;
1639 if (stream_index < 0)
1642 st= s->streams[stream_index];
1645 pos_min = s->data_offset;
1646 pos_max = avio_size(s->pb) - 1;
1648 if (pos < pos_min) pos= pos_min;
1649 else if(pos > pos_max) pos= pos_max;
1651 avio_seek(s->pb, pos, SEEK_SET);
1654 av_update_cur_dts(s, st, ts);
1659 static int av_seek_frame_generic(AVFormatContext *s,
1660 int stream_index, int64_t timestamp, int flags)
1667 st = s->streams[stream_index];
1669 index = av_index_search_timestamp(st, timestamp, flags);
1671 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1674 if(index < 0 || index==st->nb_index_entries-1){
1678 if(st->nb_index_entries){
1679 assert(st->index_entries);
1680 ie= &st->index_entries[st->nb_index_entries-1];
1681 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1683 av_update_cur_dts(s, st, ie->timestamp);
1685 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1691 ret = av_read_frame(s, &pkt);
1692 }while(ret == AVERROR(EAGAIN));
1695 av_free_packet(&pkt);
1696 if(stream_index == pkt.stream_index){
1697 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1701 index = av_index_search_timestamp(st, timestamp, flags);
1706 ff_read_frame_flush(s);
1707 if (s->iformat->read_seek){
1708 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1711 ie = &st->index_entries[index];
1712 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1714 av_update_cur_dts(s, st, ie->timestamp);
1719 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1724 ff_read_frame_flush(s);
1726 if(flags & AVSEEK_FLAG_BYTE)
1727 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1729 if(stream_index < 0){
1730 stream_index= av_find_default_stream_index(s);
1731 if(stream_index < 0)
1734 st= s->streams[stream_index];
1735 /* timestamp for default must be expressed in AV_TIME_BASE units */
1736 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1739 /* first, we try the format specific seek */
1740 if (s->iformat->read_seek)
1741 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1748 if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
1749 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1750 else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
1751 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1756 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1758 if(min_ts > ts || max_ts < ts)
1761 ff_read_frame_flush(s);
1763 if (s->iformat->read_seek2)
1764 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1766 if(s->iformat->read_timestamp){
1767 //try to seek via read_timestamp()
1770 //Fallback to old API if new is not implemented but old is
1771 //Note the old has somewat different sematics
1772 if(s->iformat->read_seek || 1)
1773 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1775 // try some generic seek like av_seek_frame_generic() but with new ts semantics
1778 /*******************************************************/
1781 * Return TRUE if the stream has accurate duration in any stream.
1783 * @return TRUE if the stream has accurate duration for at least one component.
1785 static int av_has_duration(AVFormatContext *ic)
1790 for(i = 0;i < ic->nb_streams; i++) {
1791 st = ic->streams[i];
1792 if (st->duration != AV_NOPTS_VALUE)
1799 * Estimate the stream timings from the one of each components.
1801 * Also computes the global bitrate if possible.
1803 static void av_update_stream_timings(AVFormatContext *ic)
1805 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
1806 int64_t duration, duration1;
1810 start_time = INT64_MAX;
1811 start_time_text = INT64_MAX;
1812 end_time = INT64_MIN;
1813 duration = INT64_MIN;
1814 for(i = 0;i < ic->nb_streams; i++) {
1815 st = ic->streams[i];
1816 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1817 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1818 if (st->codec->codec_id == CODEC_ID_DVB_TELETEXT) {
1819 if (start_time1 < start_time_text)
1820 start_time_text = start_time1;
1822 if (start_time1 < start_time)
1823 start_time = start_time1;
1824 if (st->duration != AV_NOPTS_VALUE) {
1825 end_time1 = start_time1
1826 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1827 if (end_time1 > end_time)
1828 end_time = end_time1;
1831 if (st->duration != AV_NOPTS_VALUE) {
1832 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1833 if (duration1 > duration)
1834 duration = duration1;
1837 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
1838 start_time = start_time_text;
1839 if (start_time != INT64_MAX) {
1840 ic->start_time = start_time;
1841 if (end_time != INT64_MIN) {
1842 if (end_time - start_time > duration)
1843 duration = end_time - start_time;
1846 if (duration != INT64_MIN) {
1847 ic->duration = duration;
1848 if (ic->file_size > 0) {
1849 /* compute the bitrate */
1850 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1851 (double)ic->duration;
1856 static void fill_all_stream_timings(AVFormatContext *ic)
1861 av_update_stream_timings(ic);
1862 for(i = 0;i < ic->nb_streams; i++) {
1863 st = ic->streams[i];
1864 if (st->start_time == AV_NOPTS_VALUE) {
1865 if(ic->start_time != AV_NOPTS_VALUE)
1866 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1867 if(ic->duration != AV_NOPTS_VALUE)
1868 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1873 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1875 int64_t filesize, duration;
1879 /* if bit_rate is already set, we believe it */
1880 if (ic->bit_rate <= 0) {
1882 for(i=0;i<ic->nb_streams;i++) {
1883 st = ic->streams[i];
1884 if (st->codec->bit_rate > 0)
1885 bit_rate += st->codec->bit_rate;
1887 ic->bit_rate = bit_rate;
1890 /* if duration is already set, we believe it */
1891 if (ic->duration == AV_NOPTS_VALUE &&
1892 ic->bit_rate != 0 &&
1893 ic->file_size != 0) {
1894 filesize = ic->file_size;
1896 for(i = 0; i < ic->nb_streams; i++) {
1897 st = ic->streams[i];
1898 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1899 if (st->duration == AV_NOPTS_VALUE)
1900 st->duration = duration;
1906 #define DURATION_MAX_READ_SIZE 250000
1907 #define DURATION_MAX_RETRY 3
1909 /* only usable for MPEG-PS streams */
1910 static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1912 AVPacket pkt1, *pkt = &pkt1;
1914 int read_size, i, ret;
1916 int64_t filesize, offset, duration;
1921 /* flush packet queue */
1922 flush_packet_queue(ic);
1924 for (i=0; i<ic->nb_streams; i++) {
1925 st = ic->streams[i];
1926 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1927 av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
1930 av_parser_close(st->parser);
1932 av_free_packet(&st->cur_pkt);
1936 /* estimate the end time (duration) */
1937 /* XXX: may need to support wrapping */
1938 filesize = ic->file_size;
1939 end_time = AV_NOPTS_VALUE;
1941 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1945 avio_seek(ic->pb, offset, SEEK_SET);
1948 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1952 ret = av_read_packet(ic, pkt);
1953 }while(ret == AVERROR(EAGAIN));
1956 read_size += pkt->size;
1957 st = ic->streams[pkt->stream_index];
1958 if (pkt->pts != AV_NOPTS_VALUE &&
1959 (st->start_time != AV_NOPTS_VALUE ||
1960 st->first_dts != AV_NOPTS_VALUE)) {
1961 duration = end_time = pkt->pts;
1962 if (st->start_time != AV_NOPTS_VALUE) duration -= st->start_time;
1963 else duration -= st->first_dts;
1965 duration += 1LL<<st->pts_wrap_bits;
1967 if (st->duration == AV_NOPTS_VALUE ||
1968 st->duration < duration)
1969 st->duration = duration;
1972 av_free_packet(pkt);
1974 }while( end_time==AV_NOPTS_VALUE
1975 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1976 && ++retry <= DURATION_MAX_RETRY);
1978 fill_all_stream_timings(ic);
1980 avio_seek(ic->pb, old_offset, SEEK_SET);
1981 for (i=0; i<ic->nb_streams; i++) {
1983 st->cur_dts= st->first_dts;
1984 st->last_IP_pts = AV_NOPTS_VALUE;
1985 st->reference_dts = AV_NOPTS_VALUE;
1989 static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
1993 /* get the file size, if possible */
1994 if (ic->iformat->flags & AVFMT_NOFILE) {
1997 file_size = avio_size(ic->pb);
2001 ic->file_size = file_size;
2003 if ((!strcmp(ic->iformat->name, "mpeg") ||
2004 !strcmp(ic->iformat->name, "mpegts")) &&
2005 file_size && ic->pb->seekable) {
2006 /* get accurate estimate from the PTSes */
2007 av_estimate_timings_from_pts(ic, old_offset);
2008 } else if (av_has_duration(ic)) {
2009 /* at least one component has timings - we use them for all
2011 fill_all_stream_timings(ic);
2013 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2014 /* less precise: use bitrate info */
2015 av_estimate_timings_from_bit_rate(ic);
2017 av_update_stream_timings(ic);
2023 for(i = 0;i < ic->nb_streams; i++) {
2024 st = ic->streams[i];
2025 printf("%d: start_time: %0.3f duration: %0.3f\n",
2026 i, (double)st->start_time / AV_TIME_BASE,
2027 (double)st->duration / AV_TIME_BASE);
2029 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2030 (double)ic->start_time / AV_TIME_BASE,
2031 (double)ic->duration / AV_TIME_BASE,
2032 ic->bit_rate / 1000);
2037 static int has_codec_parameters(AVCodecContext *enc)
2040 switch(enc->codec_type) {
2041 case AVMEDIA_TYPE_AUDIO:
2042 val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
2043 if(!enc->frame_size &&
2044 (enc->codec_id == CODEC_ID_VORBIS ||
2045 enc->codec_id == CODEC_ID_AAC ||
2046 enc->codec_id == CODEC_ID_MP1 ||
2047 enc->codec_id == CODEC_ID_MP2 ||
2048 enc->codec_id == CODEC_ID_MP3 ||
2049 enc->codec_id == CODEC_ID_SPEEX ||
2050 enc->codec_id == CODEC_ID_CELT))
2053 case AVMEDIA_TYPE_VIDEO:
2054 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2060 return enc->codec_id != CODEC_ID_NONE && val != 0;
2063 static int has_decode_delay_been_guessed(AVStream *st)
2065 return st->codec->codec_id != CODEC_ID_H264 ||
2066 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2069 static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2073 int got_picture, data_size, ret=0;
2076 if(!st->codec->codec){
2077 codec = avcodec_find_decoder(st->codec->codec_id);
2080 ret = avcodec_open(st->codec, codec);
2085 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2086 switch(st->codec->codec_type) {
2087 case AVMEDIA_TYPE_VIDEO:
2088 avcodec_get_frame_defaults(&picture);
2089 ret = avcodec_decode_video2(st->codec, &picture,
2090 &got_picture, avpkt);
2092 case AVMEDIA_TYPE_AUDIO:
2093 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2094 samples = av_malloc(data_size);
2097 ret = avcodec_decode_audio3(st->codec, samples,
2109 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2111 while (tags->id != CODEC_ID_NONE) {
2119 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2122 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2123 if(tag == tags[i].tag)
2126 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2127 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2130 return CODEC_ID_NONE;
2133 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2136 for(i=0; tags && tags[i]; i++){
2137 int tag= ff_codec_get_tag(tags[i], id);
2143 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2146 for(i=0; tags && tags[i]; i++){
2147 enum CodecID id= ff_codec_get_id(tags[i], tag);
2148 if(id!=CODEC_ID_NONE) return id;
2150 return CODEC_ID_NONE;
2153 static void compute_chapters_end(AVFormatContext *s)
2156 int64_t max_time = s->duration + (s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time;
2158 for (i = 0; i < s->nb_chapters; i++)
2159 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2160 AVChapter *ch = s->chapters[i];
2161 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2164 for (j = 0; j < s->nb_chapters; j++) {
2165 AVChapter *ch1 = s->chapters[j];
2166 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2167 if (j != i && next_start > ch->start && next_start < end)
2170 ch->end = (end == INT64_MAX) ? ch->start : end;
2174 static int get_std_framerate(int i){
2175 if(i<60*12) return i*1001;
2176 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2180 * Is the time base unreliable.
2181 * This is a heuristic to balance between quick acceptance of the values in
2182 * the headers vs. some extra checks.
2183 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2184 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2185 * And there are "variable" fps files this needs to detect as well.
2187 static int tb_unreliable(AVCodecContext *c){
2188 if( c->time_base.den >= 101L*c->time_base.num
2189 || c->time_base.den < 5L*c->time_base.num
2190 /* || c->codec_tag == AV_RL32("DIVX")
2191 || c->codec_tag == AV_RL32("XVID")*/
2192 || c->codec_id == CODEC_ID_MPEG2VIDEO
2193 || c->codec_id == CODEC_ID_H264
2199 int av_find_stream_info(AVFormatContext *ic)
2201 int i, count, ret, read_size, j;
2203 AVPacket pkt1, *pkt;
2204 int64_t old_offset = avio_tell(ic->pb);
2206 for(i=0;i<ic->nb_streams;i++) {
2208 st = ic->streams[i];
2209 if (st->codec->codec_id == CODEC_ID_AAC) {
2210 st->codec->sample_rate = 0;
2211 st->codec->frame_size = 0;
2212 st->codec->channels = 0;
2214 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2215 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2216 /* if(!st->time_base.num)
2218 if(!st->codec->time_base.num)
2219 st->codec->time_base= st->time_base;
2221 //only for the split stuff
2222 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2223 st->parser = av_parser_init(st->codec->codec_id);
2224 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2225 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2228 assert(!st->codec->codec);
2229 codec = avcodec_find_decoder(st->codec->codec_id);
2231 /* Force decoding of at least one frame of codec data
2232 * this makes sure the codec initializes the channel configuration
2233 * and does not trust the values from the container.
2235 if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
2236 st->codec->channels = 0;
2238 /* Ensure that subtitle_header is properly set. */
2239 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2240 && codec && !st->codec->codec)
2241 avcodec_open(st->codec, codec);
2243 //try to just open decoders, in case this is enough to get parameters
2244 if(!has_codec_parameters(st->codec)){
2245 if (codec && !st->codec->codec)
2246 avcodec_open(st->codec, codec);
2250 for (i=0; i<ic->nb_streams; i++) {
2251 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2257 if(url_interrupt_cb()){
2259 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2263 /* check if one codec still needs to be handled */
2264 for(i=0;i<ic->nb_streams;i++) {
2265 int fps_analyze_framecount = 20;
2267 st = ic->streams[i];
2268 if (!has_codec_parameters(st->codec))
2270 /* if the timebase is coarse (like the usual millisecond precision
2271 of mkv), we need to analyze more frames to reliably arrive at
2273 if (av_q2d(st->time_base) > 0.0005)
2274 fps_analyze_framecount *= 2;
2275 /* variable fps and no guess at the real fps */
2276 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2277 && st->info->duration_count < fps_analyze_framecount
2278 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2280 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2282 if(st->first_dts == AV_NOPTS_VALUE)
2285 if (i == ic->nb_streams) {
2286 /* NOTE: if the format has no header, then we need to read
2287 some packets to get most of the streams, so we cannot
2289 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2290 /* if we found the info for all the codecs, we can stop */
2292 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2296 /* we did not get all the codec info, but we read too much data */
2297 if (read_size >= ic->probesize) {
2299 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2303 /* NOTE: a new stream can be added there if no header in file
2304 (AVFMTCTX_NOHEADER) */
2305 ret = av_read_frame_internal(ic, &pkt1);
2306 if (ret < 0 && ret != AVERROR(EAGAIN)) {
2308 ret = -1; /* we could not have all the codec parameters before EOF */
2309 for(i=0;i<ic->nb_streams;i++) {
2310 st = ic->streams[i];
2311 if (!has_codec_parameters(st->codec)){
2313 avcodec_string(buf, sizeof(buf), st->codec, 0);
2314 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2322 if (ret == AVERROR(EAGAIN))
2325 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2326 if ((ret = av_dup_packet(pkt)) < 0)
2327 goto find_stream_info_err;
2329 read_size += pkt->size;
2331 st = ic->streams[pkt->stream_index];
2332 if (st->codec_info_nb_frames>1) {
2334 if (st->time_base.den > 0 && (t=av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q)) >= ic->max_analyze_duration) {
2335 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %Ld\n", ic->max_analyze_duration, t);
2338 st->info->codec_info_duration += pkt->duration;
2341 int64_t last = st->info->last_dts;
2342 int64_t duration= pkt->dts - last;
2344 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2345 double dur= duration * av_q2d(st->time_base);
2347 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2348 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2349 if (st->info->duration_count < 2)
2350 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2351 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2352 int framerate= get_std_framerate(i);
2353 int ticks= lrintf(dur*framerate/(1001*12));
2354 double error= dur - ticks*1001*12/(double)framerate;
2355 st->info->duration_error[i] += error*error;
2357 st->info->duration_count++;
2358 // ignore the first 4 values, they might have some random jitter
2359 if (st->info->duration_count > 3)
2360 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2362 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2363 st->info->last_dts = pkt->dts;
2365 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2366 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2368 st->codec->extradata_size= i;
2369 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2370 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2371 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2375 /* if still no information, we try to open the codec and to
2376 decompress the frame. We try to avoid that in most cases as
2377 it takes longer and uses more memory. For MPEG-4, we need to
2378 decompress for QuickTime. */
2379 if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
2380 try_decode_frame(st, pkt);
2382 st->codec_info_nb_frames++;
2386 // close codecs which were opened in try_decode_frame()
2387 for(i=0;i<ic->nb_streams;i++) {
2388 st = ic->streams[i];
2389 if(st->codec->codec)
2390 avcodec_close(st->codec);
2392 for(i=0;i<ic->nb_streams;i++) {
2393 st = ic->streams[i];
2394 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2395 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2396 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2397 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2398 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2399 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2400 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2401 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2402 st->codec->codec_tag= tag;
2405 // the check for tb_unreliable() is not completely correct, since this is not about handling
2406 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2407 // ipmovie.c produces.
2408 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)
2409 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);
2410 if (st->info->duration_count && !st->r_frame_rate.num
2411 && tb_unreliable(st->codec) /*&&
2412 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2413 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2415 double best_error= 2*av_q2d(st->time_base);
2416 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2418 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2419 double error = st->info->duration_error[j] * get_std_framerate(j);
2420 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2421 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2422 if(error < best_error){
2424 num = get_std_framerate(j);
2427 // do not increase frame rate by more than 1 % in order to match a standard rate.
2428 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2429 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2432 if (!st->r_frame_rate.num){
2433 if( st->codec->time_base.den * (int64_t)st->time_base.num
2434 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2435 st->r_frame_rate.num = st->codec->time_base.den;
2436 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2438 st->r_frame_rate.num = st->time_base.den;
2439 st->r_frame_rate.den = st->time_base.num;
2442 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2443 if(!st->codec->bits_per_coded_sample)
2444 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2445 // set stream disposition based on audio service type
2446 switch (st->codec->audio_service_type) {
2447 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2448 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2449 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2450 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2451 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2452 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2453 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2454 st->disposition = AV_DISPOSITION_COMMENT; break;
2455 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2456 st->disposition = AV_DISPOSITION_KARAOKE; break;
2461 av_estimate_timings(ic, old_offset);
2463 compute_chapters_end(ic);
2466 /* correct DTS for B-frame streams with no timestamps */
2467 for(i=0;i<ic->nb_streams;i++) {
2468 st = ic->streams[i];
2469 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2471 ppktl = &ic->packet_buffer;
2473 if(ppkt1->stream_index != i)
2475 if(ppkt1->pkt->dts < 0)
2477 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2479 ppkt1->pkt->dts -= delta;
2484 st->cur_dts -= delta;
2490 find_stream_info_err:
2491 for (i=0; i < ic->nb_streams; i++)
2492 av_freep(&ic->streams[i]->info);
2496 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2500 for (i = 0; i < ic->nb_programs; i++)
2501 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2502 if (ic->programs[i]->stream_index[j] == s)
2503 return ic->programs[i];
2507 int av_find_best_stream(AVFormatContext *ic,
2508 enum AVMediaType type,
2509 int wanted_stream_nb,
2511 AVCodec **decoder_ret,
2514 int i, nb_streams = ic->nb_streams;
2515 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2516 unsigned *program = NULL;
2517 AVCodec *decoder = NULL, *best_decoder = NULL;
2519 if (related_stream >= 0 && wanted_stream_nb < 0) {
2520 AVProgram *p = find_program_from_stream(ic, related_stream);
2522 program = p->stream_index;
2523 nb_streams = p->nb_stream_indexes;
2526 for (i = 0; i < nb_streams; i++) {
2527 int real_stream_index = program ? program[i] : i;
2528 AVStream *st = ic->streams[real_stream_index];
2529 AVCodecContext *avctx = st->codec;
2530 if (avctx->codec_type != type)
2532 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2534 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2537 decoder = avcodec_find_decoder(st->codec->codec_id);
2540 ret = AVERROR_DECODER_NOT_FOUND;
2544 if (best_count >= st->codec_info_nb_frames)
2546 best_count = st->codec_info_nb_frames;
2547 ret = real_stream_index;
2548 best_decoder = decoder;
2549 if (program && i == nb_streams - 1 && ret < 0) {
2551 nb_streams = ic->nb_streams;
2552 i = 0; /* no related stream found, try again with everything */
2556 *decoder_ret = best_decoder;
2560 /*******************************************************/
2562 int av_read_play(AVFormatContext *s)
2564 if (s->iformat->read_play)
2565 return s->iformat->read_play(s);
2567 return avio_pause(s->pb, 0);
2568 return AVERROR(ENOSYS);
2571 int av_read_pause(AVFormatContext *s)
2573 if (s->iformat->read_pause)
2574 return s->iformat->read_pause(s);
2576 return avio_pause(s->pb, 1);
2577 return AVERROR(ENOSYS);
2580 void av_close_input_stream(AVFormatContext *s)
2582 flush_packet_queue(s);
2583 if (s->iformat->read_close)
2584 s->iformat->read_close(s);
2585 avformat_free_context(s);
2588 void avformat_free_context(AVFormatContext *s)
2593 for(i=0;i<s->nb_streams;i++) {
2594 /* free all data in a stream component */
2597 av_parser_close(st->parser);
2598 av_free_packet(&st->cur_pkt);
2600 av_metadata_free(&st->metadata);
2601 av_free(st->index_entries);
2602 av_free(st->codec->extradata);
2603 av_free(st->codec->subtitle_header);
2605 av_free(st->priv_data);
2609 for(i=s->nb_programs-1; i>=0; i--) {
2610 av_metadata_free(&s->programs[i]->metadata);
2611 av_freep(&s->programs[i]->stream_index);
2612 av_freep(&s->programs[i]);
2614 av_freep(&s->programs);
2615 av_freep(&s->priv_data);
2616 while(s->nb_chapters--) {
2617 av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2618 av_free(s->chapters[s->nb_chapters]);
2620 av_freep(&s->chapters);
2621 av_metadata_free(&s->metadata);
2623 av_freep(&s->streams);
2627 void av_close_input_file(AVFormatContext *s)
2629 AVIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2630 av_close_input_stream(s);
2635 AVStream *av_new_stream(AVFormatContext *s, int id)
2641 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2643 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2646 s->streams = streams;
2648 st = av_mallocz(sizeof(AVStream));
2651 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2656 st->codec= avcodec_alloc_context();
2658 /* no default bitrate if decoding */
2659 st->codec->bit_rate = 0;
2661 st->index = s->nb_streams;
2663 st->start_time = AV_NOPTS_VALUE;
2664 st->duration = AV_NOPTS_VALUE;
2665 /* we set the current DTS to 0 so that formats without any timestamps
2666 but durations get some timestamps, formats with some unknown
2667 timestamps have their first few packets buffered and the
2668 timestamps corrected before they are returned to the user */
2670 st->first_dts = AV_NOPTS_VALUE;
2671 st->probe_packets = MAX_PROBE_PACKETS;
2673 /* default pts setting is MPEG-like */
2674 av_set_pts_info(st, 33, 1, 90000);
2675 st->last_IP_pts = AV_NOPTS_VALUE;
2676 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2677 st->pts_buffer[i]= AV_NOPTS_VALUE;
2678 st->reference_dts = AV_NOPTS_VALUE;
2680 st->sample_aspect_ratio = (AVRational){0,1};
2682 s->streams[s->nb_streams++] = st;
2686 AVProgram *av_new_program(AVFormatContext *ac, int id)
2688 AVProgram *program=NULL;
2692 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2695 for(i=0; i<ac->nb_programs; i++)
2696 if(ac->programs[i]->id == id)
2697 program = ac->programs[i];
2700 program = av_mallocz(sizeof(AVProgram));
2703 dynarray_add(&ac->programs, &ac->nb_programs, program);
2704 program->discard = AVDISCARD_NONE;
2711 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2713 AVChapter *chapter = NULL;
2716 for(i=0; i<s->nb_chapters; i++)
2717 if(s->chapters[i]->id == id)
2718 chapter = s->chapters[i];
2721 chapter= av_mallocz(sizeof(AVChapter));
2724 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2726 av_metadata_set2(&chapter->metadata, "title", title, 0);
2728 chapter->time_base= time_base;
2729 chapter->start = start;
2735 /************************************************************/
2736 /* output media file */
2738 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2740 if (s->oformat->priv_data_size > 0) {
2741 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2743 return AVERROR(ENOMEM);
2744 if (s->oformat->priv_class) {
2745 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2746 av_opt_set_defaults(s->priv_data);
2749 s->priv_data = NULL;
2754 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
2755 const char *format, const char *filename)
2757 AVFormatContext *s = avformat_alloc_context();
2766 oformat = av_guess_format(format, NULL, NULL);
2768 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
2769 ret = AVERROR(EINVAL);
2773 oformat = av_guess_format(NULL, filename, NULL);
2775 ret = AVERROR(EINVAL);
2776 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
2783 s->oformat = oformat;
2784 if (s->oformat->priv_data_size > 0) {
2785 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2788 if (s->oformat->priv_class) {
2789 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2790 av_opt_set_defaults(s->priv_data);
2793 s->priv_data = NULL;
2796 av_strlcpy(s->filename, filename, sizeof(s->filename));
2800 av_log(s, AV_LOG_ERROR, "Out of memory\n");
2801 ret = AVERROR(ENOMEM);
2803 avformat_free_context(s);
2807 #if FF_API_ALLOC_OUTPUT_CONTEXT
2808 AVFormatContext *avformat_alloc_output_context(const char *format,
2809 AVOutputFormat *oformat, const char *filename)
2811 AVFormatContext *avctx;
2812 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
2813 return ret < 0 ? NULL : avctx;
2817 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2819 const AVCodecTag *avctag;
2821 enum CodecID id = CODEC_ID_NONE;
2822 unsigned int tag = 0;
2825 * Check that tag + id is in the table
2826 * If neither is in the table -> OK
2827 * If tag is in the table with another id -> FAIL
2828 * If id is in the table with another tag -> FAIL unless strict < normal
2830 for (n = 0; s->oformat->codec_tag[n]; n++) {
2831 avctag = s->oformat->codec_tag[n];
2832 while (avctag->id != CODEC_ID_NONE) {
2833 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2835 if (id == st->codec->codec_id)
2838 if (avctag->id == st->codec->codec_id)
2843 if (id != CODEC_ID_NONE)
2845 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2850 int av_write_header(AVFormatContext *s)
2855 // some sanity checks
2856 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2857 av_log(s, AV_LOG_ERROR, "no streams\n");
2858 return AVERROR(EINVAL);
2861 for(i=0;i<s->nb_streams;i++) {
2864 switch (st->codec->codec_type) {
2865 case AVMEDIA_TYPE_AUDIO:
2866 if(st->codec->sample_rate<=0){
2867 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2868 return AVERROR(EINVAL);
2870 if(!st->codec->block_align)
2871 st->codec->block_align = st->codec->channels *
2872 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2874 case AVMEDIA_TYPE_VIDEO:
2875 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2876 av_log(s, AV_LOG_ERROR, "time base not set\n");
2877 return AVERROR(EINVAL);
2879 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2880 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2881 return AVERROR(EINVAL);
2883 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2884 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2885 return AVERROR(EINVAL);
2890 if(s->oformat->codec_tag){
2891 if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
2892 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2893 st->codec->codec_tag= 0;
2895 if(st->codec->codec_tag){
2896 if (!validate_codec_tag(s, st)) {
2898 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2899 av_log(s, AV_LOG_ERROR,
2900 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2901 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2902 return AVERROR_INVALIDDATA;
2905 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2908 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2909 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2910 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2913 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2914 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2916 return AVERROR(ENOMEM);
2919 /* set muxer identification string */
2920 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2921 av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2924 if(s->oformat->write_header){
2925 ret = s->oformat->write_header(s);
2930 /* init PTS generation */
2931 for(i=0;i<s->nb_streams;i++) {
2932 int64_t den = AV_NOPTS_VALUE;
2935 switch (st->codec->codec_type) {
2936 case AVMEDIA_TYPE_AUDIO:
2937 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2939 case AVMEDIA_TYPE_VIDEO:
2940 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2945 if (den != AV_NOPTS_VALUE) {
2947 return AVERROR_INVALIDDATA;
2948 av_frac_init(&st->pts, 0, 0, den);
2954 //FIXME merge with compute_pkt_fields
2955 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2956 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2957 int num, den, frame_size, i;
2959 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2960 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2962 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2963 return AVERROR(EINVAL);*/
2965 /* duration field */
2966 if (pkt->duration == 0) {
2967 compute_frame_duration(&num, &den, st, NULL, pkt);
2969 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2973 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2976 //XXX/FIXME this is a temporary hack until all encoders output pts
2977 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2979 // pkt->pts= st->cur_dts;
2980 pkt->pts= st->pts.val;
2983 //calculate dts from pts
2984 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2985 st->pts_buffer[0]= pkt->pts;
2986 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2987 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2988 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2989 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2991 pkt->dts= st->pts_buffer[0];
2994 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2995 av_log(s, AV_LOG_ERROR,
2996 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2997 st->index, st->cur_dts, pkt->dts);
2998 return AVERROR(EINVAL);
3000 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3001 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3002 return AVERROR(EINVAL);
3005 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3006 st->cur_dts= pkt->dts;
3007 st->pts.val= pkt->dts;
3010 switch (st->codec->codec_type) {
3011 case AVMEDIA_TYPE_AUDIO:
3012 frame_size = get_audio_frame_size(st->codec, pkt->size);
3014 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3015 likely equal to the encoder delay, but it would be better if we
3016 had the real timestamps from the encoder */
3017 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3018 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3021 case AVMEDIA_TYPE_VIDEO:
3022 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3030 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3032 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3034 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3037 ret= s->oformat->write_packet(s, pkt);
3039 ret= url_ferror(s->pb);
3043 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3044 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3046 AVPacketList **next_point, *this_pktl;
3048 this_pktl = av_mallocz(sizeof(AVPacketList));
3049 this_pktl->pkt= *pkt;
3050 pkt->destruct= NULL; // do not free original but only the copy
3051 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3053 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3054 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3056 next_point = &s->packet_buffer;
3059 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3060 while(!compare(s, &(*next_point)->pkt, pkt)){
3061 next_point= &(*next_point)->next;
3065 next_point = &(s->packet_buffer_end->next);
3068 assert(!*next_point);
3070 s->packet_buffer_end= this_pktl;
3073 this_pktl->next= *next_point;
3075 s->streams[pkt->stream_index]->last_in_packet_buffer=
3076 *next_point= this_pktl;
3079 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3081 AVStream *st = s->streams[ pkt ->stream_index];
3082 AVStream *st2= s->streams[ next->stream_index];
3083 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3087 return pkt->stream_index < next->stream_index;
3091 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3097 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3100 for(i=0; i < s->nb_streams; i++)
3101 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3103 if(stream_count && (s->nb_streams == stream_count || flush)){
3104 pktl= s->packet_buffer;
3107 s->packet_buffer= pktl->next;
3108 if(!s->packet_buffer)
3109 s->packet_buffer_end= NULL;
3111 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3112 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3116 av_init_packet(out);
3122 * Interleave an AVPacket correctly so it can be muxed.
3123 * @param out the interleaved packet will be output here
3124 * @param in the input packet
3125 * @param flush 1 if no further packets are available as input and all
3126 * remaining packets should be output
3127 * @return 1 if a packet was output, 0 if no packet could be output,
3128 * < 0 if an error occurred
3130 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3131 if(s->oformat->interleave_packet)
3132 return s->oformat->interleave_packet(s, out, in, flush);
3134 return av_interleave_packet_per_dts(s, out, in, flush);
3137 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3138 AVStream *st= s->streams[ pkt->stream_index];
3141 //FIXME/XXX/HACK drop zero sized packets
3142 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3145 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3146 pkt->size, pkt->dts, pkt->pts);
3147 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3150 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3151 return AVERROR(EINVAL);
3155 int ret= av_interleave_packet(s, &opkt, pkt, 0);
3156 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3159 ret= s->oformat->write_packet(s, &opkt);
3161 av_free_packet(&opkt);
3166 if(url_ferror(s->pb))
3167 return url_ferror(s->pb);
3171 int av_write_trailer(AVFormatContext *s)
3177 ret= av_interleave_packet(s, &pkt, NULL, 1);
3178 if(ret<0) //FIXME cleanup needed for ret<0 ?
3183 ret= s->oformat->write_packet(s, &pkt);
3185 av_free_packet(&pkt);
3189 if(url_ferror(s->pb))
3193 if(s->oformat->write_trailer)
3194 ret = s->oformat->write_trailer(s);
3197 ret=url_ferror(s->pb);
3198 for(i=0;i<s->nb_streams;i++) {
3199 av_freep(&s->streams[i]->priv_data);
3200 av_freep(&s->streams[i]->index_entries);
3202 av_freep(&s->priv_data);
3206 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3209 AVProgram *program=NULL;
3212 if (idx >= ac->nb_streams) {
3213 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3217 for(i=0; i<ac->nb_programs; i++){
3218 if(ac->programs[i]->id != progid)
3220 program = ac->programs[i];
3221 for(j=0; j<program->nb_stream_indexes; j++)
3222 if(program->stream_index[j] == idx)
3225 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3228 program->stream_index = tmp;
3229 program->stream_index[program->nb_stream_indexes++] = idx;
3234 static void print_fps(double d, const char *postfix){
3235 uint64_t v= lrintf(d*100);
3236 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3237 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3238 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3241 static void dump_metadata(void *ctx, AVMetadata *m, const char *indent)
3243 if(m && !(m->count == 1 && av_metadata_get(m, "language", NULL, 0))){
3244 AVMetadataTag *tag=NULL;
3246 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3247 while((tag=av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
3248 if(strcmp("language", tag->key))
3249 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3254 /* "user interface" functions */
3255 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3258 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3259 AVStream *st = ic->streams[i];
3260 int g = av_gcd(st->time_base.num, st->time_base.den);
3261 AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
3262 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3263 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3264 /* the pid is an important information, so we display it */
3265 /* XXX: add a generic system */
3266 if (flags & AVFMT_SHOW_IDS)
3267 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3269 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3270 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3271 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3272 if (st->sample_aspect_ratio.num && // default
3273 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3274 AVRational display_aspect_ratio;
3275 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3276 st->codec->width*st->sample_aspect_ratio.num,
3277 st->codec->height*st->sample_aspect_ratio.den,
3279 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3280 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3281 display_aspect_ratio.num, display_aspect_ratio.den);
3283 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3284 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3285 print_fps(av_q2d(st->avg_frame_rate), "fps");
3286 if(st->r_frame_rate.den && st->r_frame_rate.num)
3287 print_fps(av_q2d(st->r_frame_rate), "tbr");
3288 if(st->time_base.den && st->time_base.num)
3289 print_fps(1/av_q2d(st->time_base), "tbn");
3290 if(st->codec->time_base.den && st->codec->time_base.num)
3291 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3293 if (st->disposition & AV_DISPOSITION_DEFAULT)
3294 av_log(NULL, AV_LOG_INFO, " (default)");
3295 if (st->disposition & AV_DISPOSITION_DUB)
3296 av_log(NULL, AV_LOG_INFO, " (dub)");
3297 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3298 av_log(NULL, AV_LOG_INFO, " (original)");
3299 if (st->disposition & AV_DISPOSITION_COMMENT)
3300 av_log(NULL, AV_LOG_INFO, " (comment)");
3301 if (st->disposition & AV_DISPOSITION_LYRICS)
3302 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3303 if (st->disposition & AV_DISPOSITION_KARAOKE)
3304 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3305 if (st->disposition & AV_DISPOSITION_FORCED)
3306 av_log(NULL, AV_LOG_INFO, " (forced)");
3307 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3308 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3309 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3310 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3311 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3312 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3313 av_log(NULL, AV_LOG_INFO, "\n");
3314 dump_metadata(NULL, st->metadata, " ");
3317 #if FF_API_DUMP_FORMAT
3318 void dump_format(AVFormatContext *ic,
3323 av_dump_format(ic, index, url, is_output);
3327 void av_dump_format(AVFormatContext *ic,
3333 uint8_t *printed = av_mallocz(ic->nb_streams);
3334 if (ic->nb_streams && !printed)
3337 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3338 is_output ? "Output" : "Input",
3340 is_output ? ic->oformat->name : ic->iformat->name,
3341 is_output ? "to" : "from", url);
3342 dump_metadata(NULL, ic->metadata, " ");
3344 av_log(NULL, AV_LOG_INFO, " Duration: ");
3345 if (ic->duration != AV_NOPTS_VALUE) {
3346 int hours, mins, secs, us;
3347 secs = ic->duration / AV_TIME_BASE;
3348 us = ic->duration % AV_TIME_BASE;
3353 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3354 (100 * us) / AV_TIME_BASE);
3356 av_log(NULL, AV_LOG_INFO, "N/A");
3358 if (ic->start_time != AV_NOPTS_VALUE) {
3360 av_log(NULL, AV_LOG_INFO, ", start: ");
3361 secs = ic->start_time / AV_TIME_BASE;
3362 us = abs(ic->start_time % AV_TIME_BASE);
3363 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3364 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3366 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3368 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3370 av_log(NULL, AV_LOG_INFO, "N/A");
3372 av_log(NULL, AV_LOG_INFO, "\n");
3374 for (i = 0; i < ic->nb_chapters; i++) {
3375 AVChapter *ch = ic->chapters[i];
3376 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3377 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3378 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3380 dump_metadata(NULL, ch->metadata, " ");
3382 if(ic->nb_programs) {
3383 int j, k, total = 0;
3384 for(j=0; j<ic->nb_programs; j++) {
3385 AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata,
3387 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3388 name ? name->value : "");
3389 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3390 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3391 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3392 printed[ic->programs[j]->stream_index[k]] = 1;
3394 total += ic->programs[j]->nb_stream_indexes;
3396 if (total < ic->nb_streams)
3397 av_log(NULL, AV_LOG_INFO, " No Program\n");
3399 for(i=0;i<ic->nb_streams;i++)
3401 dump_stream_format(ic, i, index, is_output);
3406 int64_t av_gettime(void)
3409 gettimeofday(&tv,NULL);
3410 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3413 uint64_t ff_ntp_time(void)
3415 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3418 #if FF_API_PARSE_DATE
3419 #include "libavutil/parseutils.h"
3421 int64_t parse_date(const char *timestr, int duration)
3424 av_parse_time(&timeval, timestr, duration);
3429 #if FF_API_FIND_INFO_TAG
3430 #include "libavutil/parseutils.h"
3432 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3434 return av_find_info_tag(arg, arg_size, tag1, info);
3438 int av_get_frame_filename(char *buf, int buf_size,
3439 const char *path, int number)
3442 char *q, buf1[20], c;
3443 int nd, len, percentd_found;
3455 while (isdigit(*p)) {
3456 nd = nd * 10 + *p++ - '0';
3459 } while (isdigit(c));
3468 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3470 if ((q - buf + len) > buf_size - 1)
3472 memcpy(q, buf1, len);
3480 if ((q - buf) < buf_size - 1)
3484 if (!percentd_found)
3493 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3497 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3499 for(i=0;i<size;i+=16) {
3506 PRINT(" %02x", buf[i+j]);
3511 for(j=0;j<len;j++) {
3513 if (c < ' ' || c > '~')
3522 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3524 hex_dump_internal(NULL, f, 0, buf, size);
3527 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3529 hex_dump_internal(avcl, NULL, level, buf, size);
3532 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3535 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3536 PRINT("stream #%d:\n", pkt->stream_index);
3537 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3538 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3539 /* DTS is _always_ valid after av_read_frame() */
3541 if (pkt->dts == AV_NOPTS_VALUE)
3544 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3545 /* PTS may not be known if B-frames are present. */
3547 if (pkt->pts == AV_NOPTS_VALUE)
3550 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3552 PRINT(" size=%d\n", pkt->size);
3555 av_hex_dump(f, pkt->data, pkt->size);
3559 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3561 AVRational tb = { 1, AV_TIME_BASE };
3562 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3566 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3568 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3572 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3574 AVRational tb = { 1, AV_TIME_BASE };
3575 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3579 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3582 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3585 void av_url_split(char *proto, int proto_size,
3586 char *authorization, int authorization_size,
3587 char *hostname, int hostname_size,
3589 char *path, int path_size,
3592 const char *p, *ls, *at, *col, *brk;
3594 if (port_ptr) *port_ptr = -1;
3595 if (proto_size > 0) proto[0] = 0;
3596 if (authorization_size > 0) authorization[0] = 0;
3597 if (hostname_size > 0) hostname[0] = 0;
3598 if (path_size > 0) path[0] = 0;
3600 /* parse protocol */
3601 if ((p = strchr(url, ':'))) {
3602 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3607 /* no protocol means plain filename */
3608 av_strlcpy(path, url, path_size);
3612 /* separate path from hostname */
3613 ls = strchr(p, '/');
3615 ls = strchr(p, '?');
3617 av_strlcpy(path, ls, path_size);
3619 ls = &p[strlen(p)]; // XXX
3621 /* the rest is hostname, use that to parse auth/port */
3623 /* authorization (user[:pass]@hostname) */
3624 if ((at = strchr(p, '@')) && at < ls) {
3625 av_strlcpy(authorization, p,
3626 FFMIN(authorization_size, at + 1 - p));
3627 p = at + 1; /* skip '@' */
3630 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3632 av_strlcpy(hostname, p + 1,
3633 FFMIN(hostname_size, brk - p));
3634 if (brk[1] == ':' && port_ptr)
3635 *port_ptr = atoi(brk + 2);
3636 } else if ((col = strchr(p, ':')) && col < ls) {
3637 av_strlcpy(hostname, p,
3638 FFMIN(col + 1 - p, hostname_size));
3639 if (port_ptr) *port_ptr = atoi(col + 1);
3641 av_strlcpy(hostname, p,
3642 FFMIN(ls + 1 - p, hostname_size));
3646 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3649 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3652 'C', 'D', 'E', 'F' };
3653 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3656 'c', 'd', 'e', 'f' };
3657 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3659 for(i = 0; i < s; i++) {
3660 buff[i * 2] = hex_table[src[i] >> 4];
3661 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3667 int ff_hex_to_data(uint8_t *data, const char *p)
3674 p += strspn(p, SPACE_CHARS);
3677 c = toupper((unsigned char) *p++);
3678 if (c >= '0' && c <= '9')
3680 else if (c >= 'A' && c <= 'F')
3695 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3696 unsigned int pts_num, unsigned int pts_den)
3699 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3700 if(new_tb.num != pts_num)
3701 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3703 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3705 if(new_tb.num <= 0 || new_tb.den <= 0) {
3706 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3709 s->time_base = new_tb;
3710 s->pts_wrap_bits = pts_wrap_bits;
3713 int ff_url_join(char *str, int size, const char *proto,
3714 const char *authorization, const char *hostname,
3715 int port, const char *fmt, ...)
3718 struct addrinfo hints, *ai;
3723 av_strlcatf(str, size, "%s://", proto);
3724 if (authorization && authorization[0])
3725 av_strlcatf(str, size, "%s@", authorization);
3726 #if CONFIG_NETWORK && defined(AF_INET6)
3727 /* Determine if hostname is a numerical IPv6 address,
3728 * properly escape it within [] in that case. */
3729 memset(&hints, 0, sizeof(hints));
3730 hints.ai_flags = AI_NUMERICHOST;
3731 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3732 if (ai->ai_family == AF_INET6) {
3733 av_strlcat(str, "[", size);
3734 av_strlcat(str, hostname, size);
3735 av_strlcat(str, "]", size);
3737 av_strlcat(str, hostname, size);
3742 /* Not an IPv6 address, just output the plain string. */
3743 av_strlcat(str, hostname, size);
3746 av_strlcatf(str, size, ":%d", port);
3749 int len = strlen(str);
3752 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3758 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3759 AVFormatContext *src)
3764 local_pkt.stream_index = dst_stream;
3765 if (pkt->pts != AV_NOPTS_VALUE)
3766 local_pkt.pts = av_rescale_q(pkt->pts,
3767 src->streams[pkt->stream_index]->time_base,
3768 dst->streams[dst_stream]->time_base);
3769 if (pkt->dts != AV_NOPTS_VALUE)
3770 local_pkt.dts = av_rescale_q(pkt->dts,
3771 src->streams[pkt->stream_index]->time_base,
3772 dst->streams[dst_stream]->time_base);
3773 return av_write_frame(dst, &local_pkt);
3776 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3779 const char *ptr = str;
3781 /* Parse key=value pairs. */
3784 char *dest = NULL, *dest_end;
3785 int key_len, dest_len = 0;
3787 /* Skip whitespace and potential commas. */
3788 while (*ptr && (isspace(*ptr) || *ptr == ','))
3795 if (!(ptr = strchr(key, '=')))
3798 key_len = ptr - key;
3800 callback_get_buf(context, key, key_len, &dest, &dest_len);
3801 dest_end = dest + dest_len - 1;
3805 while (*ptr && *ptr != '\"') {
3809 if (dest && dest < dest_end)
3813 if (dest && dest < dest_end)
3821 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3822 if (dest && dest < dest_end)
3830 int ff_find_stream_index(AVFormatContext *s, int id)
3833 for (i = 0; i < s->nb_streams; i++) {
3834 if (s->streams[i]->id == id)
3840 void ff_make_absolute_url(char *buf, int size, const char *base,
3844 /* Absolute path, relative to the current server */
3845 if (base && strstr(base, "://") && rel[0] == '/') {
3847 av_strlcpy(buf, base, size);
3848 sep = strstr(buf, "://");
3851 sep = strchr(sep, '/');
3855 av_strlcat(buf, rel, size);
3858 /* If rel actually is an absolute url, just copy it */
3859 if (!base || strstr(rel, "://") || rel[0] == '/') {
3860 av_strlcpy(buf, rel, size);
3864 av_strlcpy(buf, base, size);
3865 /* Remove the file name from the base url */
3866 sep = strrchr(buf, '/');
3871 while (av_strstart(rel, "../", NULL) && sep) {
3872 /* Remove the path delimiter at the end */
3874 sep = strrchr(buf, '/');
3875 /* If the next directory name to pop off is "..", break here */
3876 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3877 /* Readd the slash we just removed */
3878 av_strlcat(buf, "/", size);
3881 /* Cut off the directory name */
3888 av_strlcat(buf, rel, size);