2 * various utility functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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/bytestream.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/pixdesc.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
39 #include "audiointerleave.h"
53 * various utility functions for use within Libav
56 unsigned avformat_version(void)
58 return LIBAVFORMAT_VERSION_INT;
61 const char *avformat_configuration(void)
63 return LIBAV_CONFIGURATION;
66 const char *avformat_license(void)
68 #define LICENSE_PREFIX "libavformat license: "
69 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
72 /* fraction handling */
75 * f = val + (num / den) + 0.5.
77 * 'num' is normalized so that it is such as 0 <= num < den.
79 * @param f fractional number
80 * @param val integer value
81 * @param num must be >= 0
82 * @param den must be >= 1
84 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
97 * Fractional addition to f: f = f + (incr / f->den).
99 * @param f fractional number
100 * @param incr increment, can be positive or negative
102 static void frac_add(AVFrac *f, int64_t incr)
115 } else if (num >= den) {
122 /** head of registered input format linked list */
123 static AVInputFormat *first_iformat = NULL;
124 /** head of registered output format linked list */
125 static AVOutputFormat *first_oformat = NULL;
127 AVInputFormat *av_iformat_next(AVInputFormat *f)
129 if(f) return f->next;
130 else return first_iformat;
133 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
135 if(f) return f->next;
136 else return first_oformat;
139 void av_register_input_format(AVInputFormat *format)
143 while (*p != NULL) p = &(*p)->next;
148 void av_register_output_format(AVOutputFormat *format)
152 while (*p != NULL) p = &(*p)->next;
157 int av_match_ext(const char *filename, const char *extensions)
165 ext = strrchr(filename, '.');
171 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
174 if (!av_strcasecmp(ext1, ext))
184 static int match_format(const char *name, const char *names)
192 namelen = strlen(name);
193 while ((p = strchr(names, ','))) {
194 len = FFMAX(p - names, namelen);
195 if (!av_strncasecmp(name, names, len))
199 return !av_strcasecmp(name, names);
202 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
203 const char *mime_type)
205 AVOutputFormat *fmt = NULL, *fmt_found;
206 int score_max, score;
208 /* specific test for image sequences */
209 #if CONFIG_IMAGE2_MUXER
210 if (!short_name && filename &&
211 av_filename_number_test(filename) &&
212 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
213 return av_guess_format("image2", NULL, NULL);
216 /* Find the proper file type. */
219 while ((fmt = av_oformat_next(fmt))) {
221 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
223 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
225 if (filename && fmt->extensions &&
226 av_match_ext(filename, fmt->extensions)) {
229 if (score > score_max) {
237 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
238 const char *filename, const char *mime_type, enum AVMediaType type){
239 if(type == AVMEDIA_TYPE_VIDEO){
240 enum CodecID codec_id= CODEC_ID_NONE;
242 #if CONFIG_IMAGE2_MUXER
243 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
244 codec_id= ff_guess_image2_codec(filename);
247 if(codec_id == CODEC_ID_NONE)
248 codec_id= fmt->video_codec;
250 }else if(type == AVMEDIA_TYPE_AUDIO)
251 return fmt->audio_codec;
252 else if (type == AVMEDIA_TYPE_SUBTITLE)
253 return fmt->subtitle_codec;
255 return CODEC_ID_NONE;
258 AVInputFormat *av_find_input_format(const char *short_name)
260 AVInputFormat *fmt = NULL;
261 while ((fmt = av_iformat_next(fmt))) {
262 if (match_format(short_name, fmt->name))
269 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
271 int ret= av_new_packet(pkt, size);
276 pkt->pos= avio_tell(s);
278 ret= avio_read(s, pkt->data, size);
282 av_shrink_packet(pkt, ret);
287 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
292 return av_get_packet(s, pkt, size);
293 old_size = pkt->size;
294 ret = av_grow_packet(pkt, size);
297 ret = avio_read(s, pkt->data + old_size, size);
298 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
303 int av_filename_number_test(const char *filename)
306 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
309 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
311 AVProbeData lpd = *pd;
312 AVInputFormat *fmt1 = NULL, *fmt;
315 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
316 int id3len = ff_id3v2_tag_len(lpd.buf);
317 if (lpd.buf_size > id3len + 16) {
319 lpd.buf_size -= id3len;
325 while ((fmt1 = av_iformat_next(fmt1))) {
326 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
329 if (fmt1->read_probe) {
330 score = fmt1->read_probe(&lpd);
331 } else if (fmt1->extensions) {
332 if (av_match_ext(lpd.filename, fmt1->extensions)) {
336 if (score > *score_max) {
339 }else if (score == *score_max)
343 /* a hack for files with huge id3v2 tags -- try to guess by file extension. */
344 if (!fmt && is_opened && *score_max < AVPROBE_SCORE_MAX/4) {
345 while ((fmt = av_iformat_next(fmt)))
346 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
347 *score_max = AVPROBE_SCORE_MAX/4;
352 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4-1) {
353 while ((fmt = av_iformat_next(fmt)))
354 if (fmt->extensions && av_match_ext("mp3", fmt->extensions)) {
355 *score_max = AVPROBE_SCORE_MAX/4-1;
363 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
365 return av_probe_input_format2(pd, is_opened, &score);
368 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
370 static const struct {
371 const char *name; enum CodecID id; enum AVMediaType type;
373 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
374 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
375 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
376 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
377 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
378 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
379 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
380 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
383 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
387 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
388 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
389 for (i = 0; fmt_id_type[i].name; i++) {
390 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
391 st->codec->codec_id = fmt_id_type[i].id;
392 st->codec->codec_type = fmt_id_type[i].type;
400 /************************************************************/
401 /* input media file */
403 /** size of probe buffer, for guessing file type from file contents */
404 #define PROBE_BUF_MIN 2048
405 #define PROBE_BUF_MAX (1<<20)
407 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
408 const char *filename, void *logctx,
409 unsigned int offset, unsigned int max_probe_size)
411 AVProbeData pd = { filename ? filename : "", NULL, -offset };
412 unsigned char *buf = NULL;
413 int ret = 0, probe_size;
415 if (!max_probe_size) {
416 max_probe_size = PROBE_BUF_MAX;
417 } else if (max_probe_size > PROBE_BUF_MAX) {
418 max_probe_size = PROBE_BUF_MAX;
419 } else if (max_probe_size < PROBE_BUF_MIN) {
420 return AVERROR(EINVAL);
423 if (offset >= max_probe_size) {
424 return AVERROR(EINVAL);
427 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
428 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
429 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
430 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
432 if (probe_size < offset) {
436 /* read probe data */
437 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
438 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
439 /* fail if error was not end of file, otherwise, lower score */
440 if (ret != AVERROR_EOF) {
445 ret = 0; /* error was end of file, nothing read */
448 pd.buf = &buf[offset];
450 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
452 /* guess file format */
453 *fmt = av_probe_input_format2(&pd, 1, &score);
455 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
456 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
458 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
464 return AVERROR_INVALIDDATA;
467 /* rewind. reuse probe buffer to avoid seeking */
468 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
474 /* open input file and probe the format if necessary */
475 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
478 AVProbeData pd = {filename, NULL, 0};
481 s->flags |= AVFMT_FLAG_CUSTOM_IO;
483 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
484 else if (s->iformat->flags & AVFMT_NOFILE)
485 return AVERROR(EINVAL);
489 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
490 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
493 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ,
494 &s->interrupt_callback, options)) < 0)
498 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
501 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
503 AVFormatContext *s = *ps;
505 AVDictionary *tmp = NULL;
507 if (!s && !(s = avformat_alloc_context()))
508 return AVERROR(ENOMEM);
513 av_dict_copy(&tmp, *options, 0);
515 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
518 if ((ret = init_input(s, filename, &tmp)) < 0)
521 /* check filename in case an image number is expected */
522 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
523 if (!av_filename_number_test(filename)) {
524 ret = AVERROR(EINVAL);
529 s->duration = s->start_time = AV_NOPTS_VALUE;
530 av_strlcpy(s->filename, filename, sizeof(s->filename));
532 /* allocate private data */
533 if (s->iformat->priv_data_size > 0) {
534 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
535 ret = AVERROR(ENOMEM);
538 if (s->iformat->priv_class) {
539 *(const AVClass**)s->priv_data = s->iformat->priv_class;
540 av_opt_set_defaults(s->priv_data);
541 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
546 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
548 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
550 if (s->iformat->read_header)
551 if ((ret = s->iformat->read_header(s)) < 0)
554 if (s->pb && !s->data_offset)
555 s->data_offset = avio_tell(s->pb);
557 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
560 av_dict_free(options);
568 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
570 avformat_free_context(s);
575 /*******************************************************/
577 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
578 AVPacketList **plast_pktl){
579 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
584 (*plast_pktl)->next = pktl;
586 *packet_buffer = pktl;
588 /* add the packet in the buffered packet list */
594 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
600 AVPacketList *pktl = s->raw_packet_buffer;
604 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
605 !s->streams[pkt->stream_index]->probe_packets ||
606 s->raw_packet_buffer_remaining_size < pkt->size){
607 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
610 s->raw_packet_buffer = pktl->next;
611 s->raw_packet_buffer_remaining_size += pkt->size;
618 ret= s->iformat->read_packet(s, pkt);
620 if (!pktl || ret == AVERROR(EAGAIN))
622 for (i = 0; i < s->nb_streams; i++)
623 s->streams[i]->probe_packets = 0;
627 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
628 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
629 av_log(s, AV_LOG_WARNING,
630 "Dropped corrupted packet (stream = %d)\n",
636 st= s->streams[pkt->stream_index];
638 switch(st->codec->codec_type){
639 case AVMEDIA_TYPE_VIDEO:
640 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
642 case AVMEDIA_TYPE_AUDIO:
643 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
645 case AVMEDIA_TYPE_SUBTITLE:
646 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
650 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
654 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
655 s->raw_packet_buffer_remaining_size -= pkt->size;
657 if(st->codec->codec_id == CODEC_ID_PROBE){
658 AVProbeData *pd = &st->probe_data;
659 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
662 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
663 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
664 pd->buf_size += pkt->size;
665 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
667 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
668 //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
669 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
670 if(st->codec->codec_id != CODEC_ID_PROBE){
673 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
680 /**********************************************************/
683 * Get the number of samples of an audio frame. Return -1 on error.
685 static int get_audio_frame_size(AVCodecContext *enc, int size)
689 if(enc->codec_id == CODEC_ID_VORBIS)
692 if (enc->frame_size <= 1) {
693 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
695 if (bits_per_sample) {
696 if (enc->channels == 0)
698 frame_size = (size << 3) / (bits_per_sample * enc->channels);
700 /* used for example by ADPCM codecs */
701 if (enc->bit_rate == 0)
703 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
706 frame_size = enc->frame_size;
713 * Return the frame duration in seconds. Return 0 if not available.
715 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
716 AVCodecParserContext *pc, AVPacket *pkt)
722 switch(st->codec->codec_type) {
723 case AVMEDIA_TYPE_VIDEO:
724 if (st->r_frame_rate.num) {
725 *pnum = st->r_frame_rate.den;
726 *pden = st->r_frame_rate.num;
727 } else if(st->time_base.num*1000LL > st->time_base.den) {
728 *pnum = st->time_base.num;
729 *pden = st->time_base.den;
730 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
731 *pnum = st->codec->time_base.num;
732 *pden = st->codec->time_base.den;
733 if (pc && pc->repeat_pict) {
734 *pnum = (*pnum) * (1 + pc->repeat_pict);
736 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
737 //Thus if we have no parser in such case leave duration undefined.
738 if(st->codec->ticks_per_frame>1 && !pc){
743 case AVMEDIA_TYPE_AUDIO:
744 frame_size = get_audio_frame_size(st->codec, pkt->size);
745 if (frame_size <= 0 || st->codec->sample_rate <= 0)
748 *pden = st->codec->sample_rate;
755 static int is_intra_only(AVCodecContext *enc){
756 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
758 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
759 switch(enc->codec_id){
761 case CODEC_ID_MJPEGB:
763 case CODEC_ID_PRORES:
764 case CODEC_ID_RAWVIDEO:
765 case CODEC_ID_DVVIDEO:
766 case CODEC_ID_HUFFYUV:
767 case CODEC_ID_FFVHUFF:
772 case CODEC_ID_JPEG2000:
780 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
781 int64_t dts, int64_t pts)
783 AVStream *st= s->streams[stream_index];
784 AVPacketList *pktl= s->packet_buffer;
786 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
789 st->first_dts= dts - st->cur_dts;
792 for(; pktl; pktl= pktl->next){
793 if(pktl->pkt.stream_index != stream_index)
795 //FIXME think more about this check
796 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
797 pktl->pkt.pts += st->first_dts;
799 if(pktl->pkt.dts != AV_NOPTS_VALUE)
800 pktl->pkt.dts += st->first_dts;
802 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
803 st->start_time= pktl->pkt.pts;
805 if (st->start_time == AV_NOPTS_VALUE)
806 st->start_time = pts;
809 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
811 AVPacketList *pktl= s->packet_buffer;
814 if(st->first_dts != AV_NOPTS_VALUE){
815 cur_dts= st->first_dts;
816 for(; pktl; pktl= pktl->next){
817 if(pktl->pkt.stream_index == pkt->stream_index){
818 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
820 cur_dts -= pkt->duration;
823 pktl= s->packet_buffer;
824 st->first_dts = cur_dts;
825 }else if(st->cur_dts)
828 for(; pktl; pktl= pktl->next){
829 if(pktl->pkt.stream_index != pkt->stream_index)
831 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
832 && !pktl->pkt.duration){
833 pktl->pkt.dts= cur_dts;
834 if(!st->codec->has_b_frames)
835 pktl->pkt.pts= cur_dts;
836 cur_dts += pkt->duration;
837 pktl->pkt.duration= pkt->duration;
841 if(st->first_dts == AV_NOPTS_VALUE)
842 st->cur_dts= cur_dts;
845 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
846 AVCodecParserContext *pc, AVPacket *pkt)
848 int num, den, presentation_delayed, delay, i;
851 if (s->flags & AVFMT_FLAG_NOFILLIN)
854 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
855 pkt->dts= AV_NOPTS_VALUE;
857 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
858 //FIXME Set low_delay = 0 when has_b_frames = 1
859 st->codec->has_b_frames = 1;
861 /* do we have a video B-frame ? */
862 delay= st->codec->has_b_frames;
863 presentation_delayed = 0;
865 /* XXX: need has_b_frame, but cannot get it if the codec is
868 pc && pc->pict_type != AV_PICTURE_TYPE_B)
869 presentation_delayed = 1;
871 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
872 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
873 pkt->dts -= 1LL<<st->pts_wrap_bits;
876 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
877 // we take the conservative approach and discard both
878 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
879 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
880 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
881 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
884 if (pkt->duration == 0) {
885 compute_frame_duration(&num, &den, st, pc, pkt);
887 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
889 if(pkt->duration != 0 && s->packet_buffer)
890 update_initial_durations(s, st, pkt);
894 /* correct timestamps with byte offset if demuxers only have timestamps
895 on packet boundaries */
896 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
897 /* this will estimate bitrate based on this frame's duration and size */
898 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
899 if(pkt->pts != AV_NOPTS_VALUE)
901 if(pkt->dts != AV_NOPTS_VALUE)
905 if (pc && pc->dts_sync_point >= 0) {
906 // we have synchronization info from the parser
907 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
909 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
910 if (pkt->dts != AV_NOPTS_VALUE) {
911 // got DTS from the stream, update reference timestamp
912 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
913 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
914 } else if (st->reference_dts != AV_NOPTS_VALUE) {
915 // compute DTS based on reference timestamp
916 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
917 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
919 if (pc->dts_sync_point > 0)
920 st->reference_dts = pkt->dts; // new reference
924 /* This may be redundant, but it should not hurt. */
925 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
926 presentation_delayed = 1;
928 // 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);
929 /* interpolate PTS and DTS if they are not present */
930 //We skip H264 currently because delay and has_b_frames are not reliably set
931 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
932 if (presentation_delayed) {
933 /* DTS = decompression timestamp */
934 /* PTS = presentation timestamp */
935 if (pkt->dts == AV_NOPTS_VALUE)
936 pkt->dts = st->last_IP_pts;
937 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
938 if (pkt->dts == AV_NOPTS_VALUE)
939 pkt->dts = st->cur_dts;
941 /* this is tricky: the dts must be incremented by the duration
942 of the frame we are displaying, i.e. the last I- or P-frame */
943 if (st->last_IP_duration == 0)
944 st->last_IP_duration = pkt->duration;
945 if(pkt->dts != AV_NOPTS_VALUE)
946 st->cur_dts = pkt->dts + st->last_IP_duration;
947 st->last_IP_duration = pkt->duration;
948 st->last_IP_pts= pkt->pts;
949 /* cannot compute PTS if not present (we can compute it only
950 by knowing the future */
951 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
952 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
953 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
954 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
955 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
956 pkt->pts += pkt->duration;
957 // 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);
961 /* presentation is not delayed : PTS and DTS are the same */
962 if(pkt->pts == AV_NOPTS_VALUE)
964 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
965 if(pkt->pts == AV_NOPTS_VALUE)
966 pkt->pts = st->cur_dts;
968 if(pkt->pts != AV_NOPTS_VALUE)
969 st->cur_dts = pkt->pts + pkt->duration;
973 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
974 st->pts_buffer[0]= pkt->pts;
975 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
976 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
977 if(pkt->dts == AV_NOPTS_VALUE)
978 pkt->dts= st->pts_buffer[0];
979 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
980 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
982 if(pkt->dts > st->cur_dts)
983 st->cur_dts = pkt->dts;
986 // 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);
989 if(is_intra_only(st->codec))
990 pkt->flags |= AV_PKT_FLAG_KEY;
993 /* keyframe computation */
994 if (pc->key_frame == 1)
995 pkt->flags |= AV_PKT_FLAG_KEY;
996 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
997 pkt->flags |= AV_PKT_FLAG_KEY;
1000 pkt->convergence_duration = pc->convergence_duration;
1004 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1009 av_init_packet(pkt);
1012 /* select current input stream component */
1015 if (!st->need_parsing || !st->parser) {
1016 /* no parsing needed: we just output the packet as is */
1017 /* raw data support */
1018 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1019 compute_pkt_fields(s, st, NULL, pkt);
1021 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1022 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1023 ff_reduce_index(s, st->index);
1024 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1027 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1028 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1029 st->cur_ptr, st->cur_len,
1030 st->cur_pkt.pts, st->cur_pkt.dts,
1032 st->cur_pkt.pts = AV_NOPTS_VALUE;
1033 st->cur_pkt.dts = AV_NOPTS_VALUE;
1034 /* increment read pointer */
1038 /* return packet if any */
1042 pkt->stream_index = st->index;
1043 pkt->pts = st->parser->pts;
1044 pkt->dts = st->parser->dts;
1045 pkt->pos = st->parser->pos;
1046 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1048 pkt->destruct= st->cur_pkt.destruct;
1049 st->cur_pkt.destruct= NULL;
1050 st->cur_pkt.data = NULL;
1051 assert(st->cur_len == 0);
1053 pkt->destruct = NULL;
1055 compute_pkt_fields(s, st, st->parser, pkt);
1057 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1058 ff_reduce_index(s, st->index);
1059 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1060 0, 0, AVINDEX_KEYFRAME);
1067 av_free_packet(&st->cur_pkt);
1072 /* read next packet */
1073 ret = av_read_packet(s, &cur_pkt);
1075 if (ret == AVERROR(EAGAIN))
1077 /* return the last frames, if any */
1078 for(i = 0; i < s->nb_streams; i++) {
1080 if (st->parser && st->need_parsing) {
1081 av_parser_parse2(st->parser, st->codec,
1082 &pkt->data, &pkt->size,
1084 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1090 /* no more packets: really terminate parsing */
1093 st = s->streams[cur_pkt.stream_index];
1094 st->cur_pkt= cur_pkt;
1096 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1097 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1098 st->cur_pkt.pts < st->cur_pkt.dts){
1099 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1100 st->cur_pkt.stream_index,
1104 // av_free_packet(&st->cur_pkt);
1108 if(s->debug & FF_FDEBUG_TS)
1109 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1110 st->cur_pkt.stream_index,
1114 st->cur_pkt.duration,
1118 st->cur_ptr = st->cur_pkt.data;
1119 st->cur_len = st->cur_pkt.size;
1120 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1121 st->parser = av_parser_init(st->codec->codec_id);
1123 /* no parser available: just output the raw packets */
1124 st->need_parsing = AVSTREAM_PARSE_NONE;
1125 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1126 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1127 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1128 st->parser->flags |= PARSER_FLAG_ONCE;
1133 if(s->debug & FF_FDEBUG_TS)
1134 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1145 static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
1147 AVPacketList *pktl = s->packet_buffer;
1150 s->packet_buffer = pktl->next;
1155 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1157 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1161 return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
1162 read_frame_internal(s, pkt);
1166 AVPacketList *pktl = s->packet_buffer;
1169 AVPacket *next_pkt = &pktl->pkt;
1171 if (next_pkt->dts != AV_NOPTS_VALUE) {
1172 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1173 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1174 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1175 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1176 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1177 next_pkt->pts = pktl->pkt.dts;
1181 pktl = s->packet_buffer;
1184 /* read packet from packet buffer, if there is data */
1185 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1186 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1187 return read_from_packet_buffer(s, pkt);
1190 ret = read_frame_internal(s, pkt);
1192 if (pktl && ret != AVERROR(EAGAIN)) {
1199 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1200 &s->packet_buffer_end)) < 0)
1201 return AVERROR(ENOMEM);
1205 /* XXX: suppress the packet queue */
1206 static void flush_packet_queue(AVFormatContext *s)
1211 pktl = s->packet_buffer;
1214 s->packet_buffer = pktl->next;
1215 av_free_packet(&pktl->pkt);
1218 while(s->raw_packet_buffer){
1219 pktl = s->raw_packet_buffer;
1220 s->raw_packet_buffer = pktl->next;
1221 av_free_packet(&pktl->pkt);
1224 s->packet_buffer_end=
1225 s->raw_packet_buffer_end= NULL;
1226 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1229 /*******************************************************/
1232 int av_find_default_stream_index(AVFormatContext *s)
1234 int first_audio_index = -1;
1238 if (s->nb_streams <= 0)
1240 for(i = 0; i < s->nb_streams; i++) {
1242 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1245 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1246 first_audio_index = i;
1248 return first_audio_index >= 0 ? first_audio_index : 0;
1252 * Flush the frame reader.
1254 void ff_read_frame_flush(AVFormatContext *s)
1259 flush_packet_queue(s);
1263 /* for each stream, reset read state */
1264 for(i = 0; i < s->nb_streams; i++) {
1268 av_parser_close(st->parser);
1270 av_free_packet(&st->cur_pkt);
1272 st->last_IP_pts = AV_NOPTS_VALUE;
1273 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1274 st->reference_dts = AV_NOPTS_VALUE;
1279 st->probe_packets = MAX_PROBE_PACKETS;
1281 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1282 st->pts_buffer[j]= AV_NOPTS_VALUE;
1286 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1290 for(i = 0; i < s->nb_streams; i++) {
1291 AVStream *st = s->streams[i];
1293 st->cur_dts = av_rescale(timestamp,
1294 st->time_base.den * (int64_t)ref_st->time_base.num,
1295 st->time_base.num * (int64_t)ref_st->time_base.den);
1299 void ff_reduce_index(AVFormatContext *s, int stream_index)
1301 AVStream *st= s->streams[stream_index];
1302 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1304 if((unsigned)st->nb_index_entries >= max_entries){
1306 for(i=0; 2*i<st->nb_index_entries; i++)
1307 st->index_entries[i]= st->index_entries[2*i];
1308 st->nb_index_entries= i;
1312 int ff_add_index_entry(AVIndexEntry **index_entries,
1313 int *nb_index_entries,
1314 unsigned int *index_entries_allocated_size,
1315 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1317 AVIndexEntry *entries, *ie;
1320 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1323 entries = av_fast_realloc(*index_entries,
1324 index_entries_allocated_size,
1325 (*nb_index_entries + 1) *
1326 sizeof(AVIndexEntry));
1330 *index_entries= entries;
1332 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1335 index= (*nb_index_entries)++;
1336 ie= &entries[index];
1337 assert(index==0 || ie[-1].timestamp < timestamp);
1339 ie= &entries[index];
1340 if(ie->timestamp != timestamp){
1341 if(ie->timestamp <= timestamp)
1343 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1344 (*nb_index_entries)++;
1345 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1346 distance= ie->min_distance;
1350 ie->timestamp = timestamp;
1351 ie->min_distance= distance;
1358 int av_add_index_entry(AVStream *st,
1359 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1361 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1362 &st->index_entries_allocated_size, pos,
1363 timestamp, size, distance, flags);
1366 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1367 int64_t wanted_timestamp, int flags)
1375 //optimize appending index entries at the end
1376 if(b && entries[b-1].timestamp < wanted_timestamp)
1381 timestamp = entries[m].timestamp;
1382 if(timestamp >= wanted_timestamp)
1384 if(timestamp <= wanted_timestamp)
1387 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1389 if(!(flags & AVSEEK_FLAG_ANY)){
1390 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1391 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1400 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1403 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1404 wanted_timestamp, flags);
1407 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1409 AVInputFormat *avif= s->iformat;
1410 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1411 int64_t ts_min, ts_max, ts;
1416 if (stream_index < 0)
1419 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1422 ts_min= AV_NOPTS_VALUE;
1423 pos_limit= -1; //gcc falsely says it may be uninitialized
1425 st= s->streams[stream_index];
1426 if(st->index_entries){
1429 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()
1430 index= FFMAX(index, 0);
1431 e= &st->index_entries[index];
1433 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1435 ts_min= e->timestamp;
1436 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1442 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1443 assert(index < st->nb_index_entries);
1445 e= &st->index_entries[index];
1446 assert(e->timestamp >= target_ts);
1448 ts_max= e->timestamp;
1449 pos_limit= pos_max - e->min_distance;
1450 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1451 pos_max,pos_limit, ts_max);
1455 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1460 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1463 ff_update_cur_dts(s, st, ts);
1468 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1469 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1470 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1471 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1474 int64_t start_pos, filesize;
1477 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1479 if(ts_min == AV_NOPTS_VALUE){
1480 pos_min = s->data_offset;
1481 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1482 if (ts_min == AV_NOPTS_VALUE)
1486 if(ts_max == AV_NOPTS_VALUE){
1488 filesize = avio_size(s->pb);
1489 pos_max = filesize - 1;
1492 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1494 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1495 if (ts_max == AV_NOPTS_VALUE)
1499 int64_t tmp_pos= pos_max + 1;
1500 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1501 if(tmp_ts == AV_NOPTS_VALUE)
1505 if(tmp_pos >= filesize)
1511 if(ts_min > ts_max){
1513 }else if(ts_min == ts_max){
1518 while (pos_min < pos_limit) {
1519 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1520 pos_min, pos_max, ts_min, ts_max);
1521 assert(pos_limit <= pos_max);
1524 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1525 // interpolate position (better than dichotomy)
1526 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1527 + pos_min - approximate_keyframe_distance;
1528 }else if(no_change==1){
1529 // bisection, if interpolation failed to change min or max pos last time
1530 pos = (pos_min + pos_limit)>>1;
1532 /* linear search if bisection failed, can only happen if there
1533 are very few or no keyframes between min/max */
1538 else if(pos > pos_limit)
1542 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1547 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1548 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1549 pos_limit, start_pos, no_change);
1550 if(ts == AV_NOPTS_VALUE){
1551 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1554 assert(ts != AV_NOPTS_VALUE);
1555 if (target_ts <= ts) {
1556 pos_limit = start_pos - 1;
1560 if (target_ts >= ts) {
1566 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1567 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1569 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1571 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1572 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1573 pos, ts_min, target_ts, ts_max);
1578 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1579 int64_t pos_min, pos_max;
1583 if (stream_index < 0)
1586 st= s->streams[stream_index];
1589 pos_min = s->data_offset;
1590 pos_max = avio_size(s->pb) - 1;
1592 if (pos < pos_min) pos= pos_min;
1593 else if(pos > pos_max) pos= pos_max;
1595 avio_seek(s->pb, pos, SEEK_SET);
1598 av_update_cur_dts(s, st, ts);
1603 static int seek_frame_generic(AVFormatContext *s,
1604 int stream_index, int64_t timestamp, int flags)
1611 st = s->streams[stream_index];
1613 index = av_index_search_timestamp(st, timestamp, flags);
1615 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1618 if(index < 0 || index==st->nb_index_entries-1){
1621 if(st->nb_index_entries){
1622 assert(st->index_entries);
1623 ie= &st->index_entries[st->nb_index_entries-1];
1624 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1626 ff_update_cur_dts(s, st, ie->timestamp);
1628 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1634 read_status = av_read_frame(s, &pkt);
1635 } while (read_status == AVERROR(EAGAIN));
1636 if (read_status < 0)
1638 av_free_packet(&pkt);
1639 if(stream_index == pkt.stream_index){
1640 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1644 index = av_index_search_timestamp(st, timestamp, flags);
1649 ff_read_frame_flush(s);
1650 if (s->iformat->read_seek){
1651 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1654 ie = &st->index_entries[index];
1655 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1657 ff_update_cur_dts(s, st, ie->timestamp);
1662 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1667 if (flags & AVSEEK_FLAG_BYTE) {
1668 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1670 ff_read_frame_flush(s);
1671 return seek_frame_byte(s, stream_index, timestamp, flags);
1674 if(stream_index < 0){
1675 stream_index= av_find_default_stream_index(s);
1676 if(stream_index < 0)
1679 st= s->streams[stream_index];
1680 /* timestamp for default must be expressed in AV_TIME_BASE units */
1681 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1684 /* first, we try the format specific seek */
1685 if (s->iformat->read_seek) {
1686 ff_read_frame_flush(s);
1687 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1694 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1695 ff_read_frame_flush(s);
1696 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1697 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1698 ff_read_frame_flush(s);
1699 return seek_frame_generic(s, stream_index, timestamp, flags);
1705 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1707 if(min_ts > ts || max_ts < ts)
1710 if (s->iformat->read_seek2) {
1711 ff_read_frame_flush(s);
1712 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1715 if(s->iformat->read_timestamp){
1716 //try to seek via read_timestamp()
1719 //Fallback to old API if new is not implemented but old is
1720 //Note the old has somewat different sematics
1721 if(s->iformat->read_seek || 1)
1722 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1724 // try some generic seek like seek_frame_generic() but with new ts semantics
1727 /*******************************************************/
1730 * Return TRUE if the stream has accurate duration in any stream.
1732 * @return TRUE if the stream has accurate duration for at least one component.
1734 static int has_duration(AVFormatContext *ic)
1739 for(i = 0;i < ic->nb_streams; i++) {
1740 st = ic->streams[i];
1741 if (st->duration != AV_NOPTS_VALUE)
1748 * Estimate the stream timings from the one of each components.
1750 * Also computes the global bitrate if possible.
1752 static void update_stream_timings(AVFormatContext *ic)
1754 int64_t start_time, start_time1, end_time, end_time1;
1755 int64_t duration, duration1, filesize;
1759 start_time = INT64_MAX;
1760 end_time = INT64_MIN;
1761 duration = INT64_MIN;
1762 for(i = 0;i < ic->nb_streams; i++) {
1763 st = ic->streams[i];
1764 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1765 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1766 start_time = FFMIN(start_time, start_time1);
1767 if (st->duration != AV_NOPTS_VALUE) {
1768 end_time1 = start_time1
1769 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1770 end_time = FFMAX(end_time, end_time1);
1773 if (st->duration != AV_NOPTS_VALUE) {
1774 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1775 duration = FFMAX(duration, duration1);
1778 if (start_time != INT64_MAX) {
1779 ic->start_time = start_time;
1780 if (end_time != INT64_MIN)
1781 duration = FFMAX(duration, end_time - start_time);
1783 if (duration != INT64_MIN) {
1784 ic->duration = duration;
1785 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1786 /* compute the bitrate */
1787 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1788 (double)ic->duration;
1793 static void fill_all_stream_timings(AVFormatContext *ic)
1798 update_stream_timings(ic);
1799 for(i = 0;i < ic->nb_streams; i++) {
1800 st = ic->streams[i];
1801 if (st->start_time == AV_NOPTS_VALUE) {
1802 if(ic->start_time != AV_NOPTS_VALUE)
1803 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1804 if(ic->duration != AV_NOPTS_VALUE)
1805 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1810 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1812 int64_t filesize, duration;
1816 /* if bit_rate is already set, we believe it */
1817 if (ic->bit_rate <= 0) {
1819 for(i=0;i<ic->nb_streams;i++) {
1820 st = ic->streams[i];
1821 if (st->codec->bit_rate > 0)
1822 bit_rate += st->codec->bit_rate;
1824 ic->bit_rate = bit_rate;
1827 /* if duration is already set, we believe it */
1828 if (ic->duration == AV_NOPTS_VALUE &&
1829 ic->bit_rate != 0) {
1830 filesize = ic->pb ? avio_size(ic->pb) : 0;
1832 for(i = 0; i < ic->nb_streams; i++) {
1833 st = ic->streams[i];
1834 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1835 if (st->duration == AV_NOPTS_VALUE)
1836 st->duration = duration;
1842 #define DURATION_MAX_READ_SIZE 250000
1843 #define DURATION_MAX_RETRY 3
1845 /* only usable for MPEG-PS streams */
1846 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1848 AVPacket pkt1, *pkt = &pkt1;
1850 int read_size, i, ret;
1852 int64_t filesize, offset, duration;
1857 /* flush packet queue */
1858 flush_packet_queue(ic);
1860 for (i=0; i<ic->nb_streams; i++) {
1861 st = ic->streams[i];
1862 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1863 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1866 av_parser_close(st->parser);
1868 av_free_packet(&st->cur_pkt);
1872 /* estimate the end time (duration) */
1873 /* XXX: may need to support wrapping */
1874 filesize = ic->pb ? avio_size(ic->pb) : 0;
1875 end_time = AV_NOPTS_VALUE;
1877 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1881 avio_seek(ic->pb, offset, SEEK_SET);
1884 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1888 ret = av_read_packet(ic, pkt);
1889 } while(ret == AVERROR(EAGAIN));
1892 read_size += pkt->size;
1893 st = ic->streams[pkt->stream_index];
1894 if (pkt->pts != AV_NOPTS_VALUE &&
1895 (st->start_time != AV_NOPTS_VALUE ||
1896 st->first_dts != AV_NOPTS_VALUE)) {
1897 duration = end_time = pkt->pts;
1898 if (st->start_time != AV_NOPTS_VALUE)
1899 duration -= st->start_time;
1901 duration -= st->first_dts;
1903 duration += 1LL<<st->pts_wrap_bits;
1905 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1906 st->duration = duration;
1909 av_free_packet(pkt);
1911 }while( end_time==AV_NOPTS_VALUE
1912 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1913 && ++retry <= DURATION_MAX_RETRY);
1915 fill_all_stream_timings(ic);
1917 avio_seek(ic->pb, old_offset, SEEK_SET);
1918 for (i=0; i<ic->nb_streams; i++) {
1920 st->cur_dts= st->first_dts;
1921 st->last_IP_pts = AV_NOPTS_VALUE;
1922 st->reference_dts = AV_NOPTS_VALUE;
1926 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
1930 /* get the file size, if possible */
1931 if (ic->iformat->flags & AVFMT_NOFILE) {
1934 file_size = avio_size(ic->pb);
1935 file_size = FFMAX(0, file_size);
1938 if ((!strcmp(ic->iformat->name, "mpeg") ||
1939 !strcmp(ic->iformat->name, "mpegts")) &&
1940 file_size && ic->pb->seekable) {
1941 /* get accurate estimate from the PTSes */
1942 estimate_timings_from_pts(ic, old_offset);
1943 } else if (has_duration(ic)) {
1944 /* at least one component has timings - we use them for all
1946 fill_all_stream_timings(ic);
1948 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
1949 /* less precise: use bitrate info */
1950 estimate_timings_from_bit_rate(ic);
1952 update_stream_timings(ic);
1956 AVStream av_unused *st;
1957 for(i = 0;i < ic->nb_streams; i++) {
1958 st = ic->streams[i];
1959 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
1960 (double) st->start_time / AV_TIME_BASE,
1961 (double) st->duration / AV_TIME_BASE);
1963 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1964 (double) ic->start_time / AV_TIME_BASE,
1965 (double) ic->duration / AV_TIME_BASE,
1966 ic->bit_rate / 1000);
1970 static int has_codec_parameters(AVCodecContext *avctx)
1973 switch (avctx->codec_type) {
1974 case AVMEDIA_TYPE_AUDIO:
1975 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
1976 if (!avctx->frame_size &&
1977 (avctx->codec_id == CODEC_ID_VORBIS ||
1978 avctx->codec_id == CODEC_ID_AAC ||
1979 avctx->codec_id == CODEC_ID_MP1 ||
1980 avctx->codec_id == CODEC_ID_MP2 ||
1981 avctx->codec_id == CODEC_ID_MP3 ||
1982 avctx->codec_id == CODEC_ID_CELT))
1985 case AVMEDIA_TYPE_VIDEO:
1986 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
1992 return avctx->codec_id != CODEC_ID_NONE && val != 0;
1995 static int has_decode_delay_been_guessed(AVStream *st)
1997 return st->codec->codec_id != CODEC_ID_H264 ||
1998 st->info->nb_decoded_frames >= 6;
2001 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2002 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2005 int got_picture = 1, ret = 0;
2007 AVPacket pkt = *avpkt;
2009 if (!avcodec_is_open(st->codec)) {
2010 AVDictionary *thread_opt = NULL;
2012 codec = st->codec->codec ? st->codec->codec :
2013 avcodec_find_decoder(st->codec->codec_id);
2018 /* force thread count to 1 since the h264 decoder will not extract SPS
2019 * and PPS to extradata during multi-threaded decoding */
2020 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2021 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2023 av_dict_free(&thread_opt);
2028 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2030 (!has_codec_parameters(st->codec) ||
2031 !has_decode_delay_been_guessed(st) ||
2032 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2034 avcodec_get_frame_defaults(&picture);
2035 switch(st->codec->codec_type) {
2036 case AVMEDIA_TYPE_VIDEO:
2037 ret = avcodec_decode_video2(st->codec, &picture,
2038 &got_picture, &pkt);
2040 case AVMEDIA_TYPE_AUDIO:
2041 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2048 st->info->nb_decoded_frames++;
2057 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2059 while (tags->id != CODEC_ID_NONE) {
2067 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2070 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2071 if(tag == tags[i].tag)
2074 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2075 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2078 return CODEC_ID_NONE;
2081 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2084 for(i=0; tags && tags[i]; i++){
2085 int tag= ff_codec_get_tag(tags[i], id);
2091 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2094 for(i=0; tags && tags[i]; i++){
2095 enum CodecID id= ff_codec_get_id(tags[i], tag);
2096 if(id!=CODEC_ID_NONE) return id;
2098 return CODEC_ID_NONE;
2101 static void compute_chapters_end(AVFormatContext *s)
2104 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2106 for (i = 0; i < s->nb_chapters; i++)
2107 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2108 AVChapter *ch = s->chapters[i];
2109 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2112 for (j = 0; j < s->nb_chapters; j++) {
2113 AVChapter *ch1 = s->chapters[j];
2114 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2115 if (j != i && next_start > ch->start && next_start < end)
2118 ch->end = (end == INT64_MAX) ? ch->start : end;
2122 static int get_std_framerate(int i){
2123 if(i<60*12) return i*1001;
2124 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2128 * Is the time base unreliable.
2129 * This is a heuristic to balance between quick acceptance of the values in
2130 * the headers vs. some extra checks.
2131 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2132 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2133 * And there are "variable" fps files this needs to detect as well.
2135 static int tb_unreliable(AVCodecContext *c){
2136 if( c->time_base.den >= 101L*c->time_base.num
2137 || c->time_base.den < 5L*c->time_base.num
2138 /* || c->codec_tag == AV_RL32("DIVX")
2139 || c->codec_tag == AV_RL32("XVID")*/
2140 || c->codec_id == CODEC_ID_MPEG2VIDEO
2141 || c->codec_id == CODEC_ID_H264
2147 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2149 int i, count, ret, read_size, j;
2151 AVPacket pkt1, *pkt;
2152 int64_t old_offset = avio_tell(ic->pb);
2153 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2155 for(i=0;i<ic->nb_streams;i++) {
2157 AVDictionary *thread_opt = NULL;
2158 st = ic->streams[i];
2160 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2161 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2162 /* if(!st->time_base.num)
2164 if(!st->codec->time_base.num)
2165 st->codec->time_base= st->time_base;
2167 //only for the split stuff
2168 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2169 st->parser = av_parser_init(st->codec->codec_id);
2170 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2171 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2174 codec = st->codec->codec ? st->codec->codec :
2175 avcodec_find_decoder(st->codec->codec_id);
2177 /* force thread count to 1 since the h264 decoder will not extract SPS
2178 * and PPS to extradata during multi-threaded decoding */
2179 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2181 /* Ensure that subtitle_header is properly set. */
2182 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2183 && codec && !st->codec->codec)
2184 avcodec_open2(st->codec, codec, options ? &options[i]
2187 //try to just open decoders, in case this is enough to get parameters
2188 if(!has_codec_parameters(st->codec)){
2189 if (codec && !st->codec->codec)
2190 avcodec_open2(st->codec, codec, options ? &options[i]
2194 av_dict_free(&thread_opt);
2197 for (i=0; i<ic->nb_streams; i++) {
2198 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2204 if (ff_check_interrupt(&ic->interrupt_callback)){
2206 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2210 /* check if one codec still needs to be handled */
2211 for(i=0;i<ic->nb_streams;i++) {
2212 int fps_analyze_framecount = 20;
2214 st = ic->streams[i];
2215 if (!has_codec_parameters(st->codec))
2217 /* if the timebase is coarse (like the usual millisecond precision
2218 of mkv), we need to analyze more frames to reliably arrive at
2220 if (av_q2d(st->time_base) > 0.0005)
2221 fps_analyze_framecount *= 2;
2222 if (ic->fps_probe_size >= 0)
2223 fps_analyze_framecount = ic->fps_probe_size;
2224 /* variable fps and no guess at the real fps */
2225 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2226 && st->info->duration_count < fps_analyze_framecount
2227 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2229 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2231 if(st->first_dts == AV_NOPTS_VALUE)
2234 if (i == ic->nb_streams) {
2235 /* NOTE: if the format has no header, then we need to read
2236 some packets to get most of the streams, so we cannot
2238 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2239 /* if we found the info for all the codecs, we can stop */
2241 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2245 /* we did not get all the codec info, but we read too much data */
2246 if (read_size >= ic->probesize) {
2248 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2252 /* NOTE: a new stream can be added there if no header in file
2253 (AVFMTCTX_NOHEADER) */
2254 ret = read_frame_internal(ic, &pkt1);
2255 if (ret == AVERROR(EAGAIN))
2260 AVPacket empty_pkt = { 0 };
2262 av_init_packet(&empty_pkt);
2264 ret = -1; /* we could not have all the codec parameters before EOF */
2265 for(i=0;i<ic->nb_streams;i++) {
2266 st = ic->streams[i];
2268 /* flush the decoders */
2270 err = try_decode_frame(st, &empty_pkt,
2271 (options && i < orig_nb_streams) ?
2272 &options[i] : NULL);
2273 } while (err > 0 && !has_codec_parameters(st->codec));
2276 av_log(ic, AV_LOG_WARNING,
2277 "decoding for stream %d failed\n", st->index);
2278 } else if (!has_codec_parameters(st->codec)){
2280 avcodec_string(buf, sizeof(buf), st->codec, 0);
2281 av_log(ic, AV_LOG_WARNING,
2282 "Could not find codec parameters (%s)\n", buf);
2290 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2291 if ((ret = av_dup_packet(pkt)) < 0)
2292 goto find_stream_info_err;
2294 read_size += pkt->size;
2296 st = ic->streams[pkt->stream_index];
2297 if (st->codec_info_nb_frames>1) {
2298 if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2299 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2302 st->info->codec_info_duration += pkt->duration;
2305 int64_t last = st->info->last_dts;
2307 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2308 int64_t duration= pkt->dts - last;
2309 double dur= duration * av_q2d(st->time_base);
2311 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2312 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2313 if (st->info->duration_count < 2)
2314 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2315 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2316 int framerate= get_std_framerate(i);
2317 int ticks= lrintf(dur*framerate/(1001*12));
2318 double error = dur - (double)ticks*1001*12 / framerate;
2319 st->info->duration_error[i] += error*error;
2321 st->info->duration_count++;
2322 // ignore the first 4 values, they might have some random jitter
2323 if (st->info->duration_count > 3)
2324 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2326 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2327 st->info->last_dts = pkt->dts;
2329 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2330 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2331 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2332 st->codec->extradata_size= i;
2333 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2334 if (!st->codec->extradata)
2335 return AVERROR(ENOMEM);
2336 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2337 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2341 /* if still no information, we try to open the codec and to
2342 decompress the frame. We try to avoid that in most cases as
2343 it takes longer and uses more memory. For MPEG-4, we need to
2344 decompress for QuickTime.
2346 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2347 least one frame of codec data, this makes sure the codec initializes
2348 the channel configuration and does not only trust the values from the container.
2350 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2352 st->codec_info_nb_frames++;
2356 // close codecs which were opened in try_decode_frame()
2357 for(i=0;i<ic->nb_streams;i++) {
2358 st = ic->streams[i];
2359 avcodec_close(st->codec);
2361 for(i=0;i<ic->nb_streams;i++) {
2362 st = ic->streams[i];
2363 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2364 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2365 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2366 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2367 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2368 // the check for tb_unreliable() is not completely correct, since this is not about handling
2369 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2370 // ipmovie.c produces.
2371 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2372 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);
2373 if (st->info->duration_count && !st->r_frame_rate.num
2374 && tb_unreliable(st->codec) /*&&
2375 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2376 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2378 double best_error= 2*av_q2d(st->time_base);
2379 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2381 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2382 double error = st->info->duration_error[j] * get_std_framerate(j);
2383 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2384 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2385 if(error < best_error){
2387 num = get_std_framerate(j);
2390 // do not increase frame rate by more than 1 % in order to match a standard rate.
2391 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2392 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2395 if (!st->r_frame_rate.num){
2396 if( st->codec->time_base.den * (int64_t)st->time_base.num
2397 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2398 st->r_frame_rate.num = st->codec->time_base.den;
2399 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2401 st->r_frame_rate.num = st->time_base.den;
2402 st->r_frame_rate.den = st->time_base.num;
2405 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2406 if(!st->codec->bits_per_coded_sample)
2407 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2408 // set stream disposition based on audio service type
2409 switch (st->codec->audio_service_type) {
2410 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2411 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2412 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2413 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2414 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2415 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2416 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2417 st->disposition = AV_DISPOSITION_COMMENT; break;
2418 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2419 st->disposition = AV_DISPOSITION_KARAOKE; break;
2424 estimate_timings(ic, old_offset);
2426 compute_chapters_end(ic);
2429 /* correct DTS for B-frame streams with no timestamps */
2430 for(i=0;i<ic->nb_streams;i++) {
2431 st = ic->streams[i];
2432 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2434 ppktl = &ic->packet_buffer;
2436 if(ppkt1->stream_index != i)
2438 if(ppkt1->pkt->dts < 0)
2440 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2442 ppkt1->pkt->dts -= delta;
2447 st->cur_dts -= delta;
2453 find_stream_info_err:
2454 for (i=0; i < ic->nb_streams; i++) {
2455 if (ic->streams[i]->codec)
2456 ic->streams[i]->codec->thread_count = 0;
2457 av_freep(&ic->streams[i]->info);
2462 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2466 for (i = 0; i < ic->nb_programs; i++)
2467 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2468 if (ic->programs[i]->stream_index[j] == s)
2469 return ic->programs[i];
2473 int av_find_best_stream(AVFormatContext *ic,
2474 enum AVMediaType type,
2475 int wanted_stream_nb,
2477 AVCodec **decoder_ret,
2480 int i, nb_streams = ic->nb_streams;
2481 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2482 unsigned *program = NULL;
2483 AVCodec *decoder = NULL, *best_decoder = NULL;
2485 if (related_stream >= 0 && wanted_stream_nb < 0) {
2486 AVProgram *p = find_program_from_stream(ic, related_stream);
2488 program = p->stream_index;
2489 nb_streams = p->nb_stream_indexes;
2492 for (i = 0; i < nb_streams; i++) {
2493 int real_stream_index = program ? program[i] : i;
2494 AVStream *st = ic->streams[real_stream_index];
2495 AVCodecContext *avctx = st->codec;
2496 if (avctx->codec_type != type)
2498 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2500 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2503 decoder = avcodec_find_decoder(st->codec->codec_id);
2506 ret = AVERROR_DECODER_NOT_FOUND;
2510 if (best_count >= st->codec_info_nb_frames)
2512 best_count = st->codec_info_nb_frames;
2513 ret = real_stream_index;
2514 best_decoder = decoder;
2515 if (program && i == nb_streams - 1 && ret < 0) {
2517 nb_streams = ic->nb_streams;
2518 i = 0; /* no related stream found, try again with everything */
2522 *decoder_ret = best_decoder;
2526 /*******************************************************/
2528 int av_read_play(AVFormatContext *s)
2530 if (s->iformat->read_play)
2531 return s->iformat->read_play(s);
2533 return avio_pause(s->pb, 0);
2534 return AVERROR(ENOSYS);
2537 int av_read_pause(AVFormatContext *s)
2539 if (s->iformat->read_pause)
2540 return s->iformat->read_pause(s);
2542 return avio_pause(s->pb, 1);
2543 return AVERROR(ENOSYS);
2546 void avformat_free_context(AVFormatContext *s)
2552 if (s->iformat && s->iformat->priv_class && s->priv_data)
2553 av_opt_free(s->priv_data);
2555 for(i=0;i<s->nb_streams;i++) {
2556 /* free all data in a stream component */
2559 av_parser_close(st->parser);
2560 av_free_packet(&st->cur_pkt);
2562 av_dict_free(&st->metadata);
2563 av_free(st->index_entries);
2564 av_free(st->codec->extradata);
2565 av_free(st->codec->subtitle_header);
2567 av_free(st->priv_data);
2571 for(i=s->nb_programs-1; i>=0; i--) {
2572 av_dict_free(&s->programs[i]->metadata);
2573 av_freep(&s->programs[i]->stream_index);
2574 av_freep(&s->programs[i]);
2576 av_freep(&s->programs);
2577 av_freep(&s->priv_data);
2578 while(s->nb_chapters--) {
2579 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2580 av_free(s->chapters[s->nb_chapters]);
2582 av_freep(&s->chapters);
2583 av_dict_free(&s->metadata);
2584 av_freep(&s->streams);
2588 #if FF_API_CLOSE_INPUT_FILE
2589 void av_close_input_file(AVFormatContext *s)
2591 avformat_close_input(&s);
2595 void avformat_close_input(AVFormatContext **ps)
2597 AVFormatContext *s = *ps;
2598 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2600 flush_packet_queue(s);
2601 if (s->iformat->read_close)
2602 s->iformat->read_close(s);
2603 avformat_free_context(s);
2609 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2615 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2617 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2620 s->streams = streams;
2622 st = av_mallocz(sizeof(AVStream));
2625 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2630 st->codec = avcodec_alloc_context3(c);
2632 /* no default bitrate if decoding */
2633 st->codec->bit_rate = 0;
2635 st->index = s->nb_streams;
2636 st->start_time = AV_NOPTS_VALUE;
2637 st->duration = AV_NOPTS_VALUE;
2638 /* we set the current DTS to 0 so that formats without any timestamps
2639 but durations get some timestamps, formats with some unknown
2640 timestamps have their first few packets buffered and the
2641 timestamps corrected before they are returned to the user */
2643 st->first_dts = AV_NOPTS_VALUE;
2644 st->probe_packets = MAX_PROBE_PACKETS;
2646 /* default pts setting is MPEG-like */
2647 avpriv_set_pts_info(st, 33, 1, 90000);
2648 st->last_IP_pts = AV_NOPTS_VALUE;
2649 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2650 st->pts_buffer[i]= AV_NOPTS_VALUE;
2651 st->reference_dts = AV_NOPTS_VALUE;
2653 st->sample_aspect_ratio = (AVRational){0,1};
2655 s->streams[s->nb_streams++] = st;
2659 AVProgram *av_new_program(AVFormatContext *ac, int id)
2661 AVProgram *program=NULL;
2664 av_dlog(ac, "new_program: id=0x%04x\n", id);
2666 for(i=0; i<ac->nb_programs; i++)
2667 if(ac->programs[i]->id == id)
2668 program = ac->programs[i];
2671 program = av_mallocz(sizeof(AVProgram));
2674 dynarray_add(&ac->programs, &ac->nb_programs, program);
2675 program->discard = AVDISCARD_NONE;
2682 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2684 AVChapter *chapter = NULL;
2687 for(i=0; i<s->nb_chapters; i++)
2688 if(s->chapters[i]->id == id)
2689 chapter = s->chapters[i];
2692 chapter= av_mallocz(sizeof(AVChapter));
2695 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2697 av_dict_set(&chapter->metadata, "title", title, 0);
2699 chapter->time_base= time_base;
2700 chapter->start = start;
2706 /************************************************************/
2707 /* output media file */
2709 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2711 const AVCodecTag *avctag;
2713 enum CodecID id = CODEC_ID_NONE;
2714 unsigned int tag = 0;
2717 * Check that tag + id is in the table
2718 * If neither is in the table -> OK
2719 * If tag is in the table with another id -> FAIL
2720 * If id is in the table with another tag -> FAIL unless strict < normal
2722 for (n = 0; s->oformat->codec_tag[n]; n++) {
2723 avctag = s->oformat->codec_tag[n];
2724 while (avctag->id != CODEC_ID_NONE) {
2725 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2727 if (id == st->codec->codec_id)
2730 if (avctag->id == st->codec->codec_id)
2735 if (id != CODEC_ID_NONE)
2737 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2742 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2746 AVDictionary *tmp = NULL;
2749 av_dict_copy(&tmp, *options, 0);
2750 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2753 // some sanity checks
2754 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2755 av_log(s, AV_LOG_ERROR, "no streams\n");
2756 ret = AVERROR(EINVAL);
2760 for(i=0;i<s->nb_streams;i++) {
2763 switch (st->codec->codec_type) {
2764 case AVMEDIA_TYPE_AUDIO:
2765 if(st->codec->sample_rate<=0){
2766 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2767 ret = AVERROR(EINVAL);
2770 if(!st->codec->block_align)
2771 st->codec->block_align = st->codec->channels *
2772 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2774 case AVMEDIA_TYPE_VIDEO:
2775 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2776 av_log(s, AV_LOG_ERROR, "time base not set\n");
2777 ret = AVERROR(EINVAL);
2780 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2781 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2782 ret = AVERROR(EINVAL);
2785 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2786 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2787 "(%d/%d) and encoder layer (%d/%d)\n",
2788 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2789 st->codec->sample_aspect_ratio.num,
2790 st->codec->sample_aspect_ratio.den);
2791 ret = AVERROR(EINVAL);
2797 if(s->oformat->codec_tag){
2798 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)){
2799 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2800 st->codec->codec_tag= 0;
2802 if(st->codec->codec_tag){
2803 if (!validate_codec_tag(s, st)) {
2805 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2806 av_log(s, AV_LOG_ERROR,
2807 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2808 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2809 ret = AVERROR_INVALIDDATA;
2813 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2816 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2817 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2818 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2821 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2822 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2823 if (!s->priv_data) {
2824 ret = AVERROR(ENOMEM);
2827 if (s->oformat->priv_class) {
2828 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2829 av_opt_set_defaults(s->priv_data);
2830 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2835 /* set muxer identification string */
2836 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2837 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2840 if(s->oformat->write_header){
2841 ret = s->oformat->write_header(s);
2846 /* init PTS generation */
2847 for(i=0;i<s->nb_streams;i++) {
2848 int64_t den = AV_NOPTS_VALUE;
2851 switch (st->codec->codec_type) {
2852 case AVMEDIA_TYPE_AUDIO:
2853 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2855 case AVMEDIA_TYPE_VIDEO:
2856 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2861 if (den != AV_NOPTS_VALUE) {
2863 ret = AVERROR_INVALIDDATA;
2866 frac_init(&st->pts, 0, 0, den);
2871 av_dict_free(options);
2880 //FIXME merge with compute_pkt_fields
2881 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2882 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2883 int num, den, frame_size, i;
2885 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2886 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2888 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2889 return AVERROR(EINVAL);*/
2891 /* duration field */
2892 if (pkt->duration == 0) {
2893 compute_frame_duration(&num, &den, st, NULL, pkt);
2895 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2899 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2902 //XXX/FIXME this is a temporary hack until all encoders output pts
2903 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2905 // pkt->pts= st->cur_dts;
2906 pkt->pts= st->pts.val;
2909 //calculate dts from pts
2910 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2911 st->pts_buffer[0]= pkt->pts;
2912 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2913 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2914 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2915 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2917 pkt->dts= st->pts_buffer[0];
2920 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2921 av_log(s, AV_LOG_ERROR,
2922 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2923 st->index, st->cur_dts, pkt->dts);
2924 return AVERROR(EINVAL);
2926 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2927 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2928 return AVERROR(EINVAL);
2931 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2932 st->cur_dts= pkt->dts;
2933 st->pts.val= pkt->dts;
2936 switch (st->codec->codec_type) {
2937 case AVMEDIA_TYPE_AUDIO:
2938 frame_size = get_audio_frame_size(st->codec, pkt->size);
2940 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2941 likely equal to the encoder delay, but it would be better if we
2942 had the real timestamps from the encoder */
2943 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2944 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2947 case AVMEDIA_TYPE_VIDEO:
2948 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2956 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2961 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
2962 return s->oformat->write_packet(s, pkt);
2966 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2968 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2971 ret= s->oformat->write_packet(s, pkt);
2974 s->streams[pkt->stream_index]->nb_frames++;
2978 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2979 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2981 AVPacketList **next_point, *this_pktl;
2983 this_pktl = av_mallocz(sizeof(AVPacketList));
2984 this_pktl->pkt= *pkt;
2985 pkt->destruct= NULL; // do not free original but only the copy
2986 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
2988 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
2989 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
2991 next_point = &s->packet_buffer;
2994 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
2995 while(!compare(s, &(*next_point)->pkt, pkt)){
2996 next_point= &(*next_point)->next;
3000 next_point = &(s->packet_buffer_end->next);
3003 assert(!*next_point);
3005 s->packet_buffer_end= this_pktl;
3008 this_pktl->next= *next_point;
3010 s->streams[pkt->stream_index]->last_in_packet_buffer=
3011 *next_point= this_pktl;
3014 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3016 AVStream *st = s->streams[ pkt ->stream_index];
3017 AVStream *st2= s->streams[ next->stream_index];
3018 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3022 return pkt->stream_index < next->stream_index;
3026 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3032 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3035 for(i=0; i < s->nb_streams; i++)
3036 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3038 if(stream_count && (s->nb_streams == stream_count || flush)){
3039 pktl= s->packet_buffer;
3042 s->packet_buffer= pktl->next;
3043 if(!s->packet_buffer)
3044 s->packet_buffer_end= NULL;
3046 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3047 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3051 av_init_packet(out);
3057 * Interleave an AVPacket correctly so it can be muxed.
3058 * @param out the interleaved packet will be output here
3059 * @param in the input packet
3060 * @param flush 1 if no further packets are available as input and all
3061 * remaining packets should be output
3062 * @return 1 if a packet was output, 0 if no packet could be output,
3063 * < 0 if an error occurred
3065 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3066 if (s->oformat->interleave_packet) {
3067 int ret = s->oformat->interleave_packet(s, out, in, flush);
3072 return av_interleave_packet_per_dts(s, out, in, flush);
3075 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3076 AVStream *st= s->streams[ pkt->stream_index];
3079 //FIXME/XXX/HACK drop zero sized packets
3080 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3083 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3084 pkt->size, pkt->dts, pkt->pts);
3085 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3088 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3089 return AVERROR(EINVAL);
3093 int ret= interleave_packet(s, &opkt, pkt, 0);
3094 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3097 ret= s->oformat->write_packet(s, &opkt);
3099 s->streams[opkt.stream_index]->nb_frames++;
3101 av_free_packet(&opkt);
3109 int av_write_trailer(AVFormatContext *s)
3115 ret= interleave_packet(s, &pkt, NULL, 1);
3116 if(ret<0) //FIXME cleanup needed for ret<0 ?
3121 ret= s->oformat->write_packet(s, &pkt);
3123 s->streams[pkt.stream_index]->nb_frames++;
3125 av_free_packet(&pkt);
3131 if(s->oformat->write_trailer)
3132 ret = s->oformat->write_trailer(s);
3134 for(i=0;i<s->nb_streams;i++) {
3135 av_freep(&s->streams[i]->priv_data);
3136 av_freep(&s->streams[i]->index_entries);
3138 if (s->oformat->priv_class)
3139 av_opt_free(s->priv_data);
3140 av_freep(&s->priv_data);
3144 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3147 AVProgram *program=NULL;
3150 if (idx >= ac->nb_streams) {
3151 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3155 for(i=0; i<ac->nb_programs; i++){
3156 if(ac->programs[i]->id != progid)
3158 program = ac->programs[i];
3159 for(j=0; j<program->nb_stream_indexes; j++)
3160 if(program->stream_index[j] == idx)
3163 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3166 program->stream_index = tmp;
3167 program->stream_index[program->nb_stream_indexes++] = idx;
3172 static void print_fps(double d, const char *postfix){
3173 uint64_t v= lrintf(d*100);
3174 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3175 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3176 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3179 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3181 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3182 AVDictionaryEntry *tag=NULL;
3184 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3185 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3186 if(strcmp("language", tag->key))
3187 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3192 /* "user interface" functions */
3193 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3196 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3197 AVStream *st = ic->streams[i];
3198 int g = av_gcd(st->time_base.num, st->time_base.den);
3199 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3200 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3201 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3202 /* the pid is an important information, so we display it */
3203 /* XXX: add a generic system */
3204 if (flags & AVFMT_SHOW_IDS)
3205 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3207 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3208 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3209 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3210 if (st->sample_aspect_ratio.num && // default
3211 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3212 AVRational display_aspect_ratio;
3213 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3214 st->codec->width*st->sample_aspect_ratio.num,
3215 st->codec->height*st->sample_aspect_ratio.den,
3217 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3218 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3219 display_aspect_ratio.num, display_aspect_ratio.den);
3221 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3222 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3223 print_fps(av_q2d(st->avg_frame_rate), "fps");
3224 if(st->r_frame_rate.den && st->r_frame_rate.num)
3225 print_fps(av_q2d(st->r_frame_rate), "tbr");
3226 if(st->time_base.den && st->time_base.num)
3227 print_fps(1/av_q2d(st->time_base), "tbn");
3228 if(st->codec->time_base.den && st->codec->time_base.num)
3229 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3231 if (st->disposition & AV_DISPOSITION_DEFAULT)
3232 av_log(NULL, AV_LOG_INFO, " (default)");
3233 if (st->disposition & AV_DISPOSITION_DUB)
3234 av_log(NULL, AV_LOG_INFO, " (dub)");
3235 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3236 av_log(NULL, AV_LOG_INFO, " (original)");
3237 if (st->disposition & AV_DISPOSITION_COMMENT)
3238 av_log(NULL, AV_LOG_INFO, " (comment)");
3239 if (st->disposition & AV_DISPOSITION_LYRICS)
3240 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3241 if (st->disposition & AV_DISPOSITION_KARAOKE)
3242 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3243 if (st->disposition & AV_DISPOSITION_FORCED)
3244 av_log(NULL, AV_LOG_INFO, " (forced)");
3245 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3246 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3247 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3248 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3249 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3250 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3251 av_log(NULL, AV_LOG_INFO, "\n");
3252 dump_metadata(NULL, st->metadata, " ");
3255 void av_dump_format(AVFormatContext *ic,
3261 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3262 if (ic->nb_streams && !printed)
3265 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3266 is_output ? "Output" : "Input",
3268 is_output ? ic->oformat->name : ic->iformat->name,
3269 is_output ? "to" : "from", url);
3270 dump_metadata(NULL, ic->metadata, " ");
3272 av_log(NULL, AV_LOG_INFO, " Duration: ");
3273 if (ic->duration != AV_NOPTS_VALUE) {
3274 int hours, mins, secs, us;
3275 secs = ic->duration / AV_TIME_BASE;
3276 us = ic->duration % AV_TIME_BASE;
3281 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3282 (100 * us) / AV_TIME_BASE);
3284 av_log(NULL, AV_LOG_INFO, "N/A");
3286 if (ic->start_time != AV_NOPTS_VALUE) {
3288 av_log(NULL, AV_LOG_INFO, ", start: ");
3289 secs = ic->start_time / AV_TIME_BASE;
3290 us = abs(ic->start_time % AV_TIME_BASE);
3291 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3292 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3294 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3296 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3298 av_log(NULL, AV_LOG_INFO, "N/A");
3300 av_log(NULL, AV_LOG_INFO, "\n");
3302 for (i = 0; i < ic->nb_chapters; i++) {
3303 AVChapter *ch = ic->chapters[i];
3304 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3305 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3306 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3308 dump_metadata(NULL, ch->metadata, " ");
3310 if(ic->nb_programs) {
3311 int j, k, total = 0;
3312 for(j=0; j<ic->nb_programs; j++) {
3313 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3315 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3316 name ? name->value : "");
3317 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3318 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3319 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3320 printed[ic->programs[j]->stream_index[k]] = 1;
3322 total += ic->programs[j]->nb_stream_indexes;
3324 if (total < ic->nb_streams)
3325 av_log(NULL, AV_LOG_INFO, " No Program\n");
3327 for(i=0;i<ic->nb_streams;i++)
3329 dump_stream_format(ic, i, index, is_output);
3334 int64_t av_gettime(void)
3337 gettimeofday(&tv,NULL);
3338 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3341 uint64_t ff_ntp_time(void)
3343 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3346 int av_get_frame_filename(char *buf, int buf_size,
3347 const char *path, int number)
3350 char *q, buf1[20], c;
3351 int nd, len, percentd_found;
3363 while (isdigit(*p)) {
3364 nd = nd * 10 + *p++ - '0';
3367 } while (isdigit(c));
3376 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3378 if ((q - buf + len) > buf_size - 1)
3380 memcpy(q, buf1, len);
3388 if ((q - buf) < buf_size - 1)
3392 if (!percentd_found)
3401 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3405 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3407 for(i=0;i<size;i+=16) {
3414 PRINT(" %02x", buf[i+j]);
3419 for(j=0;j<len;j++) {
3421 if (c < ' ' || c > '~')
3430 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3432 hex_dump_internal(NULL, f, 0, buf, size);
3435 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3437 hex_dump_internal(avcl, NULL, level, buf, size);
3440 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3443 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3444 PRINT("stream #%d:\n", pkt->stream_index);
3445 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3446 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3447 /* DTS is _always_ valid after av_read_frame() */
3449 if (pkt->dts == AV_NOPTS_VALUE)
3452 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3453 /* PTS may not be known if B-frames are present. */
3455 if (pkt->pts == AV_NOPTS_VALUE)
3458 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3460 PRINT(" size=%d\n", pkt->size);
3463 av_hex_dump(f, pkt->data, pkt->size);
3466 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3468 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3471 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3474 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3477 void av_url_split(char *proto, int proto_size,
3478 char *authorization, int authorization_size,
3479 char *hostname, int hostname_size,
3481 char *path, int path_size,
3484 const char *p, *ls, *at, *col, *brk;
3486 if (port_ptr) *port_ptr = -1;
3487 if (proto_size > 0) proto[0] = 0;
3488 if (authorization_size > 0) authorization[0] = 0;
3489 if (hostname_size > 0) hostname[0] = 0;
3490 if (path_size > 0) path[0] = 0;
3492 /* parse protocol */
3493 if ((p = strchr(url, ':'))) {
3494 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3499 /* no protocol means plain filename */
3500 av_strlcpy(path, url, path_size);
3504 /* separate path from hostname */
3505 ls = strchr(p, '/');
3507 ls = strchr(p, '?');
3509 av_strlcpy(path, ls, path_size);
3511 ls = &p[strlen(p)]; // XXX
3513 /* the rest is hostname, use that to parse auth/port */
3515 /* authorization (user[:pass]@hostname) */
3516 if ((at = strchr(p, '@')) && at < ls) {
3517 av_strlcpy(authorization, p,
3518 FFMIN(authorization_size, at + 1 - p));
3519 p = at + 1; /* skip '@' */
3522 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3524 av_strlcpy(hostname, p + 1,
3525 FFMIN(hostname_size, brk - p));
3526 if (brk[1] == ':' && port_ptr)
3527 *port_ptr = atoi(brk + 2);
3528 } else if ((col = strchr(p, ':')) && col < ls) {
3529 av_strlcpy(hostname, p,
3530 FFMIN(col + 1 - p, hostname_size));
3531 if (port_ptr) *port_ptr = atoi(col + 1);
3533 av_strlcpy(hostname, p,
3534 FFMIN(ls + 1 - p, hostname_size));
3538 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3541 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3544 'C', 'D', 'E', 'F' };
3545 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3548 'c', 'd', 'e', 'f' };
3549 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3551 for(i = 0; i < s; i++) {
3552 buff[i * 2] = hex_table[src[i] >> 4];
3553 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3559 int ff_hex_to_data(uint8_t *data, const char *p)
3566 p += strspn(p, SPACE_CHARS);
3569 c = toupper((unsigned char) *p++);
3570 if (c >= '0' && c <= '9')
3572 else if (c >= 'A' && c <= 'F')
3587 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3588 unsigned int pts_num, unsigned int pts_den)
3591 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3592 if(new_tb.num != pts_num)
3593 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3595 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3597 if(new_tb.num <= 0 || new_tb.den <= 0) {
3598 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3601 s->time_base = new_tb;
3602 s->pts_wrap_bits = pts_wrap_bits;
3605 int ff_url_join(char *str, int size, const char *proto,
3606 const char *authorization, const char *hostname,
3607 int port, const char *fmt, ...)
3610 struct addrinfo hints, *ai;
3615 av_strlcatf(str, size, "%s://", proto);
3616 if (authorization && authorization[0])
3617 av_strlcatf(str, size, "%s@", authorization);
3618 #if CONFIG_NETWORK && defined(AF_INET6)
3619 /* Determine if hostname is a numerical IPv6 address,
3620 * properly escape it within [] in that case. */
3621 memset(&hints, 0, sizeof(hints));
3622 hints.ai_flags = AI_NUMERICHOST;
3623 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3624 if (ai->ai_family == AF_INET6) {
3625 av_strlcat(str, "[", size);
3626 av_strlcat(str, hostname, size);
3627 av_strlcat(str, "]", size);
3629 av_strlcat(str, hostname, size);
3634 /* Not an IPv6 address, just output the plain string. */
3635 av_strlcat(str, hostname, size);
3638 av_strlcatf(str, size, ":%d", port);
3641 int len = strlen(str);
3644 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3650 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3651 AVFormatContext *src)
3656 local_pkt.stream_index = dst_stream;
3657 if (pkt->pts != AV_NOPTS_VALUE)
3658 local_pkt.pts = av_rescale_q(pkt->pts,
3659 src->streams[pkt->stream_index]->time_base,
3660 dst->streams[dst_stream]->time_base);
3661 if (pkt->dts != AV_NOPTS_VALUE)
3662 local_pkt.dts = av_rescale_q(pkt->dts,
3663 src->streams[pkt->stream_index]->time_base,
3664 dst->streams[dst_stream]->time_base);
3665 return av_write_frame(dst, &local_pkt);
3668 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3671 const char *ptr = str;
3673 /* Parse key=value pairs. */
3676 char *dest = NULL, *dest_end;
3677 int key_len, dest_len = 0;
3679 /* Skip whitespace and potential commas. */
3680 while (*ptr && (isspace(*ptr) || *ptr == ','))
3687 if (!(ptr = strchr(key, '=')))
3690 key_len = ptr - key;
3692 callback_get_buf(context, key, key_len, &dest, &dest_len);
3693 dest_end = dest + dest_len - 1;
3697 while (*ptr && *ptr != '\"') {
3701 if (dest && dest < dest_end)
3705 if (dest && dest < dest_end)
3713 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3714 if (dest && dest < dest_end)
3722 int ff_find_stream_index(AVFormatContext *s, int id)
3725 for (i = 0; i < s->nb_streams; i++) {
3726 if (s->streams[i]->id == id)
3732 void ff_make_absolute_url(char *buf, int size, const char *base,
3736 /* Absolute path, relative to the current server */
3737 if (base && strstr(base, "://") && rel[0] == '/') {
3739 av_strlcpy(buf, base, size);
3740 sep = strstr(buf, "://");
3743 sep = strchr(sep, '/');
3747 av_strlcat(buf, rel, size);
3750 /* If rel actually is an absolute url, just copy it */
3751 if (!base || strstr(rel, "://") || rel[0] == '/') {
3752 av_strlcpy(buf, rel, size);
3756 av_strlcpy(buf, base, size);
3757 /* Remove the file name from the base url */
3758 sep = strrchr(buf, '/');
3763 while (av_strstart(rel, "../", NULL) && sep) {
3764 /* Remove the path delimiter at the end */
3766 sep = strrchr(buf, '/');
3767 /* If the next directory name to pop off is "..", break here */
3768 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3769 /* Readd the slash we just removed */
3770 av_strlcat(buf, "/", size);
3773 /* Cut off the directory name */
3780 av_strlcat(buf, rel, size);
3783 int64_t ff_iso8601_to_unix_time(const char *datestr)
3786 struct tm time1 = {0}, time2 = {0};
3788 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3789 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3791 return av_timegm(&time2);
3793 return av_timegm(&time1);
3795 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3796 "the date string.\n");
3801 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3804 if (ofmt->query_codec)
3805 return ofmt->query_codec(codec_id, std_compliance);
3806 else if (ofmt->codec_tag)
3807 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3808 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3809 codec_id == ofmt->subtitle_codec)
3812 return AVERROR_PATCHWELCOME;
3815 int avformat_network_init(void)
3819 ff_network_inited_globally = 1;
3820 if ((ret = ff_network_init()) < 0)
3827 int avformat_network_deinit(void)
3836 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3837 uint64_t channel_layout, int32_t sample_rate,
3838 int32_t width, int32_t height)
3844 return AVERROR(EINVAL);
3847 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3849 if (channel_layout) {
3851 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3855 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3857 if (width || height) {
3859 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3861 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3863 return AVERROR(ENOMEM);
3864 bytestream_put_le32(&data, flags);
3866 bytestream_put_le32(&data, channels);
3868 bytestream_put_le64(&data, channel_layout);
3870 bytestream_put_le32(&data, sample_rate);
3871 if (width || height) {
3872 bytestream_put_le32(&data, width);
3873 bytestream_put_le32(&data, height);
3878 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3880 return ff_codec_bmp_tags;
3882 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3884 return ff_codec_wav_tags;