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 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
502 AVPacketList **plast_pktl){
503 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
508 (*plast_pktl)->next = pktl;
510 *packet_buffer = pktl;
512 /* add the packet in the buffered packet list */
518 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
520 AVFormatContext *s = *ps;
522 AVDictionary *tmp = NULL;
523 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
525 if (!s && !(s = avformat_alloc_context()))
526 return AVERROR(ENOMEM);
531 av_dict_copy(&tmp, *options, 0);
533 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
536 if ((ret = init_input(s, filename, &tmp)) < 0)
539 /* check filename in case an image number is expected */
540 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
541 if (!av_filename_number_test(filename)) {
542 ret = AVERROR(EINVAL);
547 s->duration = s->start_time = AV_NOPTS_VALUE;
548 av_strlcpy(s->filename, filename, sizeof(s->filename));
550 /* allocate private data */
551 if (s->iformat->priv_data_size > 0) {
552 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
553 ret = AVERROR(ENOMEM);
556 if (s->iformat->priv_class) {
557 *(const AVClass**)s->priv_data = s->iformat->priv_class;
558 av_opt_set_defaults(s->priv_data);
559 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
564 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
566 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
568 if (s->iformat->read_header)
569 if ((ret = s->iformat->read_header(s)) < 0)
572 if (id3v2_extra_meta &&
573 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
575 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
577 /* queue attached pictures */
578 for (i = 0; i < s->nb_streams; i++)
579 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
580 AVPacket copy = s->streams[i]->attached_pic;
581 copy.destruct = NULL;
582 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
585 if (s->pb && !s->data_offset)
586 s->data_offset = avio_tell(s->pb);
588 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
591 av_dict_free(options);
598 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
600 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
602 avformat_free_context(s);
607 /*******************************************************/
609 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
615 AVPacketList *pktl = s->raw_packet_buffer;
619 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
620 !s->streams[pkt->stream_index]->probe_packets ||
621 s->raw_packet_buffer_remaining_size < pkt->size){
622 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
625 s->raw_packet_buffer = pktl->next;
626 s->raw_packet_buffer_remaining_size += pkt->size;
633 ret= s->iformat->read_packet(s, pkt);
635 if (!pktl || ret == AVERROR(EAGAIN))
637 for (i = 0; i < s->nb_streams; i++)
638 s->streams[i]->probe_packets = 0;
642 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
643 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
644 av_log(s, AV_LOG_WARNING,
645 "Dropped corrupted packet (stream = %d)\n",
651 st= s->streams[pkt->stream_index];
653 switch(st->codec->codec_type){
654 case AVMEDIA_TYPE_VIDEO:
655 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
657 case AVMEDIA_TYPE_AUDIO:
658 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
660 case AVMEDIA_TYPE_SUBTITLE:
661 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
665 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
669 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
670 s->raw_packet_buffer_remaining_size -= pkt->size;
672 if(st->codec->codec_id == CODEC_ID_PROBE){
673 AVProbeData *pd = &st->probe_data;
674 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
677 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
678 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
679 pd->buf_size += pkt->size;
680 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
682 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
683 //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
684 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
685 if(st->codec->codec_id != CODEC_ID_PROBE){
688 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
695 /**********************************************************/
698 * Get the number of samples of an audio frame. Return -1 on error.
700 static int get_audio_frame_size(AVCodecContext *enc, int size)
704 if (enc->frame_size <= 1) {
705 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
707 if (bits_per_sample) {
708 if (enc->channels == 0)
710 frame_size = (size << 3) / (bits_per_sample * enc->channels);
712 /* used for example by ADPCM codecs */
713 if (enc->bit_rate == 0)
715 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
718 frame_size = enc->frame_size;
725 * Return the frame duration in seconds. Return 0 if not available.
727 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
728 AVCodecParserContext *pc, AVPacket *pkt)
734 switch(st->codec->codec_type) {
735 case AVMEDIA_TYPE_VIDEO:
736 if (st->r_frame_rate.num) {
737 *pnum = st->r_frame_rate.den;
738 *pden = st->r_frame_rate.num;
739 } else if(st->time_base.num*1000LL > st->time_base.den) {
740 *pnum = st->time_base.num;
741 *pden = st->time_base.den;
742 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
743 *pnum = st->codec->time_base.num;
744 *pden = st->codec->time_base.den;
745 if (pc && pc->repeat_pict) {
746 *pnum = (*pnum) * (1 + pc->repeat_pict);
748 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
749 //Thus if we have no parser in such case leave duration undefined.
750 if(st->codec->ticks_per_frame>1 && !pc){
755 case AVMEDIA_TYPE_AUDIO:
756 frame_size = get_audio_frame_size(st->codec, pkt->size);
757 if (frame_size <= 0 || st->codec->sample_rate <= 0)
760 *pden = st->codec->sample_rate;
767 static int is_intra_only(AVCodecContext *enc){
768 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
770 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
771 switch(enc->codec_id){
773 case CODEC_ID_MJPEGB:
775 case CODEC_ID_PRORES:
776 case CODEC_ID_RAWVIDEO:
777 case CODEC_ID_DVVIDEO:
778 case CODEC_ID_HUFFYUV:
779 case CODEC_ID_FFVHUFF:
784 case CODEC_ID_JPEG2000:
792 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
793 int64_t dts, int64_t pts)
795 AVStream *st= s->streams[stream_index];
796 AVPacketList *pktl= s->packet_buffer;
798 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
801 st->first_dts= dts - st->cur_dts;
804 for(; pktl; pktl= pktl->next){
805 if(pktl->pkt.stream_index != stream_index)
807 //FIXME think more about this check
808 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
809 pktl->pkt.pts += st->first_dts;
811 if(pktl->pkt.dts != AV_NOPTS_VALUE)
812 pktl->pkt.dts += st->first_dts;
814 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
815 st->start_time= pktl->pkt.pts;
817 if (st->start_time == AV_NOPTS_VALUE)
818 st->start_time = pts;
821 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
823 AVPacketList *pktl= s->packet_buffer;
826 if(st->first_dts != AV_NOPTS_VALUE){
827 cur_dts= st->first_dts;
828 for(; pktl; pktl= pktl->next){
829 if(pktl->pkt.stream_index == pkt->stream_index){
830 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
832 cur_dts -= pkt->duration;
835 pktl= s->packet_buffer;
836 st->first_dts = cur_dts;
837 }else if(st->cur_dts)
840 for(; pktl; pktl= pktl->next){
841 if(pktl->pkt.stream_index != pkt->stream_index)
843 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
844 && !pktl->pkt.duration){
845 pktl->pkt.dts= cur_dts;
846 if(!st->codec->has_b_frames)
847 pktl->pkt.pts= cur_dts;
848 cur_dts += pkt->duration;
849 pktl->pkt.duration= pkt->duration;
853 if(st->first_dts == AV_NOPTS_VALUE)
854 st->cur_dts= cur_dts;
857 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
858 AVCodecParserContext *pc, AVPacket *pkt)
860 int num, den, presentation_delayed, delay, i;
863 if (s->flags & AVFMT_FLAG_NOFILLIN)
866 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
867 pkt->dts= AV_NOPTS_VALUE;
869 /* do we have a video B-frame ? */
870 delay= st->codec->has_b_frames;
871 presentation_delayed = 0;
873 /* XXX: need has_b_frame, but cannot get it if the codec is
876 pc && pc->pict_type != AV_PICTURE_TYPE_B)
877 presentation_delayed = 1;
879 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
880 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
881 pkt->dts -= 1LL<<st->pts_wrap_bits;
884 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
885 // we take the conservative approach and discard both
886 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
887 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
888 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
889 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
892 if (pkt->duration == 0) {
893 compute_frame_duration(&num, &den, st, pc, pkt);
895 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
897 if(pkt->duration != 0 && s->packet_buffer)
898 update_initial_durations(s, st, pkt);
902 /* correct timestamps with byte offset if demuxers only have timestamps
903 on packet boundaries */
904 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
905 /* this will estimate bitrate based on this frame's duration and size */
906 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
907 if(pkt->pts != AV_NOPTS_VALUE)
909 if(pkt->dts != AV_NOPTS_VALUE)
913 if (pc && pc->dts_sync_point >= 0) {
914 // we have synchronization info from the parser
915 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
917 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
918 if (pkt->dts != AV_NOPTS_VALUE) {
919 // got DTS from the stream, update reference timestamp
920 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
921 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
922 } else if (st->reference_dts != AV_NOPTS_VALUE) {
923 // compute DTS based on reference timestamp
924 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
925 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
927 if (pc->dts_sync_point > 0)
928 st->reference_dts = pkt->dts; // new reference
932 /* This may be redundant, but it should not hurt. */
933 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
934 presentation_delayed = 1;
936 // 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);
937 /* interpolate PTS and DTS if they are not present */
938 //We skip H264 currently because delay and has_b_frames are not reliably set
939 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
940 if (presentation_delayed) {
941 /* DTS = decompression timestamp */
942 /* PTS = presentation timestamp */
943 if (pkt->dts == AV_NOPTS_VALUE)
944 pkt->dts = st->last_IP_pts;
945 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
946 if (pkt->dts == AV_NOPTS_VALUE)
947 pkt->dts = st->cur_dts;
949 /* this is tricky: the dts must be incremented by the duration
950 of the frame we are displaying, i.e. the last I- or P-frame */
951 if (st->last_IP_duration == 0)
952 st->last_IP_duration = pkt->duration;
953 if(pkt->dts != AV_NOPTS_VALUE)
954 st->cur_dts = pkt->dts + st->last_IP_duration;
955 st->last_IP_duration = pkt->duration;
956 st->last_IP_pts= pkt->pts;
957 /* cannot compute PTS if not present (we can compute it only
958 by knowing the future */
959 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
960 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
961 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
962 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
963 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
964 pkt->pts += pkt->duration;
965 // 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);
969 /* presentation is not delayed : PTS and DTS are the same */
970 if(pkt->pts == AV_NOPTS_VALUE)
972 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
973 if(pkt->pts == AV_NOPTS_VALUE)
974 pkt->pts = st->cur_dts;
976 if(pkt->pts != AV_NOPTS_VALUE)
977 st->cur_dts = pkt->pts + pkt->duration;
981 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
982 st->pts_buffer[0]= pkt->pts;
983 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
984 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
985 if(pkt->dts == AV_NOPTS_VALUE)
986 pkt->dts= st->pts_buffer[0];
987 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
988 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
990 if(pkt->dts > st->cur_dts)
991 st->cur_dts = pkt->dts;
994 // 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);
997 if(is_intra_only(st->codec))
998 pkt->flags |= AV_PKT_FLAG_KEY;
1000 pkt->convergence_duration = pc->convergence_duration;
1003 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1006 AVPacketList *pktl = *pkt_buf;
1007 *pkt_buf = pktl->next;
1008 av_free_packet(&pktl->pkt);
1011 *pkt_buf_end = NULL;
1014 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1015 AVPacketList **pkt_buffer_end,
1019 av_assert0(*pkt_buffer);
1022 *pkt_buffer = pktl->next;
1024 *pkt_buffer_end = NULL;
1030 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1035 av_init_packet(pkt);
1038 /* select current input stream component */
1041 if (!st->need_parsing || !st->parser) {
1042 /* no parsing needed: we just output the packet as is */
1043 /* raw data support */
1044 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1045 compute_pkt_fields(s, st, NULL, pkt);
1047 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1048 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1049 ff_reduce_index(s, st->index);
1050 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1053 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1054 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1055 st->cur_ptr, st->cur_len,
1056 st->cur_pkt.pts, st->cur_pkt.dts,
1058 st->cur_pkt.pts = AV_NOPTS_VALUE;
1059 st->cur_pkt.dts = AV_NOPTS_VALUE;
1060 /* increment read pointer */
1064 /* return packet if any */
1068 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1069 if (st->codec->sample_rate > 0) {
1070 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1071 (AVRational){ 1, st->codec->sample_rate },
1075 } else if (st->codec->time_base.num != 0 &&
1076 st->codec->time_base.den != 0) {
1077 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1078 st->codec->time_base,
1082 pkt->stream_index = st->index;
1083 pkt->pts = st->parser->pts;
1084 pkt->dts = st->parser->dts;
1085 pkt->pos = st->parser->pos;
1086 if (st->parser->key_frame == 1 ||
1087 (st->parser->key_frame == -1 &&
1088 st->parser->pict_type == AV_PICTURE_TYPE_I))
1089 pkt->flags |= AV_PKT_FLAG_KEY;
1090 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1092 pkt->destruct= st->cur_pkt.destruct;
1093 st->cur_pkt.destruct= NULL;
1094 st->cur_pkt.data = NULL;
1095 assert(st->cur_len == 0);
1097 pkt->destruct = NULL;
1099 compute_pkt_fields(s, st, st->parser, pkt);
1101 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1102 ff_reduce_index(s, st->index);
1103 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1104 0, 0, AVINDEX_KEYFRAME);
1111 av_free_packet(&st->cur_pkt);
1116 /* read next packet */
1117 ret = av_read_packet(s, &cur_pkt);
1119 if (ret == AVERROR(EAGAIN))
1121 /* return the last frames, if any */
1122 for(i = 0; i < s->nb_streams; i++) {
1124 if (st->parser && st->need_parsing) {
1125 av_parser_parse2(st->parser, st->codec,
1126 &pkt->data, &pkt->size,
1128 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1134 /* no more packets: really terminate parsing */
1137 st = s->streams[cur_pkt.stream_index];
1138 st->cur_pkt= cur_pkt;
1140 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1141 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1142 st->cur_pkt.pts < st->cur_pkt.dts){
1143 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1144 st->cur_pkt.stream_index,
1148 // av_free_packet(&st->cur_pkt);
1152 if(s->debug & FF_FDEBUG_TS)
1153 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1154 st->cur_pkt.stream_index,
1158 st->cur_pkt.duration,
1162 st->cur_ptr = st->cur_pkt.data;
1163 st->cur_len = st->cur_pkt.size;
1164 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1165 st->parser = av_parser_init(st->codec->codec_id);
1167 /* no parser available: just output the raw packets */
1168 st->need_parsing = AVSTREAM_PARSE_NONE;
1169 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1170 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1171 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1172 st->parser->flags |= PARSER_FLAG_ONCE;
1177 if(s->debug & FF_FDEBUG_TS)
1178 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1189 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1191 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1195 return s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1196 &s->packet_buffer_end,
1198 read_frame_internal(s, pkt);
1202 AVPacketList *pktl = s->packet_buffer;
1205 AVPacket *next_pkt = &pktl->pkt;
1207 if (next_pkt->dts != AV_NOPTS_VALUE) {
1208 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1209 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1210 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1211 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1212 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1213 next_pkt->pts = pktl->pkt.dts;
1217 pktl = s->packet_buffer;
1220 /* read packet from packet buffer, if there is data */
1221 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1222 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1223 return read_from_packet_buffer(&s->packet_buffer,
1224 &s->packet_buffer_end, pkt);
1227 ret = read_frame_internal(s, pkt);
1229 if (pktl && ret != AVERROR(EAGAIN)) {
1236 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1237 &s->packet_buffer_end)) < 0)
1238 return AVERROR(ENOMEM);
1242 /* XXX: suppress the packet queue */
1243 static void flush_packet_queue(AVFormatContext *s)
1245 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1246 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1248 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1251 /*******************************************************/
1254 int av_find_default_stream_index(AVFormatContext *s)
1256 int first_audio_index = -1;
1260 if (s->nb_streams <= 0)
1262 for(i = 0; i < s->nb_streams; i++) {
1264 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1267 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1268 first_audio_index = i;
1270 return first_audio_index >= 0 ? first_audio_index : 0;
1274 * Flush the frame reader.
1276 void ff_read_frame_flush(AVFormatContext *s)
1281 flush_packet_queue(s);
1285 /* for each stream, reset read state */
1286 for(i = 0; i < s->nb_streams; i++) {
1290 av_parser_close(st->parser);
1292 av_free_packet(&st->cur_pkt);
1294 st->last_IP_pts = AV_NOPTS_VALUE;
1295 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1296 st->reference_dts = AV_NOPTS_VALUE;
1301 st->probe_packets = MAX_PROBE_PACKETS;
1303 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1304 st->pts_buffer[j]= AV_NOPTS_VALUE;
1308 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1312 for(i = 0; i < s->nb_streams; i++) {
1313 AVStream *st = s->streams[i];
1315 st->cur_dts = av_rescale(timestamp,
1316 st->time_base.den * (int64_t)ref_st->time_base.num,
1317 st->time_base.num * (int64_t)ref_st->time_base.den);
1321 void ff_reduce_index(AVFormatContext *s, int stream_index)
1323 AVStream *st= s->streams[stream_index];
1324 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1326 if((unsigned)st->nb_index_entries >= max_entries){
1328 for(i=0; 2*i<st->nb_index_entries; i++)
1329 st->index_entries[i]= st->index_entries[2*i];
1330 st->nb_index_entries= i;
1334 int ff_add_index_entry(AVIndexEntry **index_entries,
1335 int *nb_index_entries,
1336 unsigned int *index_entries_allocated_size,
1337 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1339 AVIndexEntry *entries, *ie;
1342 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1345 entries = av_fast_realloc(*index_entries,
1346 index_entries_allocated_size,
1347 (*nb_index_entries + 1) *
1348 sizeof(AVIndexEntry));
1352 *index_entries= entries;
1354 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1357 index= (*nb_index_entries)++;
1358 ie= &entries[index];
1359 assert(index==0 || ie[-1].timestamp < timestamp);
1361 ie= &entries[index];
1362 if(ie->timestamp != timestamp){
1363 if(ie->timestamp <= timestamp)
1365 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1366 (*nb_index_entries)++;
1367 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1368 distance= ie->min_distance;
1372 ie->timestamp = timestamp;
1373 ie->min_distance= distance;
1380 int av_add_index_entry(AVStream *st,
1381 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1383 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1384 &st->index_entries_allocated_size, pos,
1385 timestamp, size, distance, flags);
1388 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1389 int64_t wanted_timestamp, int flags)
1397 //optimize appending index entries at the end
1398 if(b && entries[b-1].timestamp < wanted_timestamp)
1403 timestamp = entries[m].timestamp;
1404 if(timestamp >= wanted_timestamp)
1406 if(timestamp <= wanted_timestamp)
1409 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1411 if(!(flags & AVSEEK_FLAG_ANY)){
1412 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1413 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1422 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1425 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1426 wanted_timestamp, flags);
1429 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1431 AVInputFormat *avif= s->iformat;
1432 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1433 int64_t ts_min, ts_max, ts;
1438 if (stream_index < 0)
1441 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1444 ts_min= AV_NOPTS_VALUE;
1445 pos_limit= -1; //gcc falsely says it may be uninitialized
1447 st= s->streams[stream_index];
1448 if(st->index_entries){
1451 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()
1452 index= FFMAX(index, 0);
1453 e= &st->index_entries[index];
1455 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1457 ts_min= e->timestamp;
1458 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1464 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1465 assert(index < st->nb_index_entries);
1467 e= &st->index_entries[index];
1468 assert(e->timestamp >= target_ts);
1470 ts_max= e->timestamp;
1471 pos_limit= pos_max - e->min_distance;
1472 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1473 pos_max,pos_limit, ts_max);
1477 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1482 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1485 ff_update_cur_dts(s, st, ts);
1490 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1491 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1492 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1493 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1496 int64_t start_pos, filesize;
1499 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1501 if(ts_min == AV_NOPTS_VALUE){
1502 pos_min = s->data_offset;
1503 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1504 if (ts_min == AV_NOPTS_VALUE)
1508 if(ts_max == AV_NOPTS_VALUE){
1510 filesize = avio_size(s->pb);
1511 pos_max = filesize - 1;
1514 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1516 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1517 if (ts_max == AV_NOPTS_VALUE)
1521 int64_t tmp_pos= pos_max + 1;
1522 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1523 if(tmp_ts == AV_NOPTS_VALUE)
1527 if(tmp_pos >= filesize)
1533 if(ts_min > ts_max){
1535 }else if(ts_min == ts_max){
1540 while (pos_min < pos_limit) {
1541 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1542 pos_min, pos_max, ts_min, ts_max);
1543 assert(pos_limit <= pos_max);
1546 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1547 // interpolate position (better than dichotomy)
1548 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1549 + pos_min - approximate_keyframe_distance;
1550 }else if(no_change==1){
1551 // bisection, if interpolation failed to change min or max pos last time
1552 pos = (pos_min + pos_limit)>>1;
1554 /* linear search if bisection failed, can only happen if there
1555 are very few or no keyframes between min/max */
1560 else if(pos > pos_limit)
1564 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1569 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1570 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1571 pos_limit, start_pos, no_change);
1572 if(ts == AV_NOPTS_VALUE){
1573 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1576 assert(ts != AV_NOPTS_VALUE);
1577 if (target_ts <= ts) {
1578 pos_limit = start_pos - 1;
1582 if (target_ts >= ts) {
1588 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1589 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1591 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1593 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1594 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1595 pos, ts_min, target_ts, ts_max);
1600 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1601 int64_t pos_min, pos_max;
1605 if (stream_index < 0)
1608 st= s->streams[stream_index];
1611 pos_min = s->data_offset;
1612 pos_max = avio_size(s->pb) - 1;
1614 if (pos < pos_min) pos= pos_min;
1615 else if(pos > pos_max) pos= pos_max;
1617 avio_seek(s->pb, pos, SEEK_SET);
1620 av_update_cur_dts(s, st, ts);
1625 static int seek_frame_generic(AVFormatContext *s,
1626 int stream_index, int64_t timestamp, int flags)
1633 st = s->streams[stream_index];
1635 index = av_index_search_timestamp(st, timestamp, flags);
1637 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1640 if(index < 0 || index==st->nb_index_entries-1){
1643 if(st->nb_index_entries){
1644 assert(st->index_entries);
1645 ie= &st->index_entries[st->nb_index_entries-1];
1646 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1648 ff_update_cur_dts(s, st, ie->timestamp);
1650 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1656 read_status = av_read_frame(s, &pkt);
1657 } while (read_status == AVERROR(EAGAIN));
1658 if (read_status < 0)
1660 av_free_packet(&pkt);
1661 if(stream_index == pkt.stream_index){
1662 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1666 index = av_index_search_timestamp(st, timestamp, flags);
1671 ff_read_frame_flush(s);
1672 if (s->iformat->read_seek){
1673 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1676 ie = &st->index_entries[index];
1677 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1679 ff_update_cur_dts(s, st, ie->timestamp);
1684 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1689 if (flags & AVSEEK_FLAG_BYTE) {
1690 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1692 ff_read_frame_flush(s);
1693 return seek_frame_byte(s, stream_index, timestamp, flags);
1696 if(stream_index < 0){
1697 stream_index= av_find_default_stream_index(s);
1698 if(stream_index < 0)
1701 st= s->streams[stream_index];
1702 /* timestamp for default must be expressed in AV_TIME_BASE units */
1703 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1706 /* first, we try the format specific seek */
1707 if (s->iformat->read_seek) {
1708 ff_read_frame_flush(s);
1709 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1716 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1717 ff_read_frame_flush(s);
1718 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1719 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1720 ff_read_frame_flush(s);
1721 return seek_frame_generic(s, stream_index, timestamp, flags);
1727 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1729 if(min_ts > ts || max_ts < ts)
1732 if (s->iformat->read_seek2) {
1733 ff_read_frame_flush(s);
1734 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1737 if(s->iformat->read_timestamp){
1738 //try to seek via read_timestamp()
1741 //Fallback to old API if new is not implemented but old is
1742 //Note the old has somewat different sematics
1743 if(s->iformat->read_seek || 1)
1744 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1746 // try some generic seek like seek_frame_generic() but with new ts semantics
1749 /*******************************************************/
1752 * Return TRUE if the stream has accurate duration in any stream.
1754 * @return TRUE if the stream has accurate duration for at least one component.
1756 static int has_duration(AVFormatContext *ic)
1761 for(i = 0;i < ic->nb_streams; i++) {
1762 st = ic->streams[i];
1763 if (st->duration != AV_NOPTS_VALUE)
1770 * Estimate the stream timings from the one of each components.
1772 * Also computes the global bitrate if possible.
1774 static void update_stream_timings(AVFormatContext *ic)
1776 int64_t start_time, start_time1, end_time, end_time1;
1777 int64_t duration, duration1, filesize;
1781 start_time = INT64_MAX;
1782 end_time = INT64_MIN;
1783 duration = INT64_MIN;
1784 for(i = 0;i < ic->nb_streams; i++) {
1785 st = ic->streams[i];
1786 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1787 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1788 start_time = FFMIN(start_time, start_time1);
1789 if (st->duration != AV_NOPTS_VALUE) {
1790 end_time1 = start_time1
1791 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1792 end_time = FFMAX(end_time, end_time1);
1795 if (st->duration != AV_NOPTS_VALUE) {
1796 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1797 duration = FFMAX(duration, duration1);
1800 if (start_time != INT64_MAX) {
1801 ic->start_time = start_time;
1802 if (end_time != INT64_MIN)
1803 duration = FFMAX(duration, end_time - start_time);
1805 if (duration != INT64_MIN) {
1806 ic->duration = duration;
1807 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1808 /* compute the bitrate */
1809 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1810 (double)ic->duration;
1815 static void fill_all_stream_timings(AVFormatContext *ic)
1820 update_stream_timings(ic);
1821 for(i = 0;i < ic->nb_streams; i++) {
1822 st = ic->streams[i];
1823 if (st->start_time == AV_NOPTS_VALUE) {
1824 if(ic->start_time != AV_NOPTS_VALUE)
1825 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1826 if(ic->duration != AV_NOPTS_VALUE)
1827 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1832 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1834 int64_t filesize, duration;
1838 /* if bit_rate is already set, we believe it */
1839 if (ic->bit_rate <= 0) {
1841 for(i=0;i<ic->nb_streams;i++) {
1842 st = ic->streams[i];
1843 if (st->codec->bit_rate > 0)
1844 bit_rate += st->codec->bit_rate;
1846 ic->bit_rate = bit_rate;
1849 /* if duration is already set, we believe it */
1850 if (ic->duration == AV_NOPTS_VALUE &&
1851 ic->bit_rate != 0) {
1852 filesize = ic->pb ? avio_size(ic->pb) : 0;
1854 for(i = 0; i < ic->nb_streams; i++) {
1855 st = ic->streams[i];
1856 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1857 if (st->duration == AV_NOPTS_VALUE)
1858 st->duration = duration;
1864 #define DURATION_MAX_READ_SIZE 250000
1865 #define DURATION_MAX_RETRY 3
1867 /* only usable for MPEG-PS streams */
1868 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1870 AVPacket pkt1, *pkt = &pkt1;
1872 int read_size, i, ret;
1874 int64_t filesize, offset, duration;
1879 /* flush packet queue */
1880 flush_packet_queue(ic);
1882 for (i=0; i<ic->nb_streams; i++) {
1883 st = ic->streams[i];
1884 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1885 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1888 av_parser_close(st->parser);
1890 av_free_packet(&st->cur_pkt);
1894 /* estimate the end time (duration) */
1895 /* XXX: may need to support wrapping */
1896 filesize = ic->pb ? avio_size(ic->pb) : 0;
1897 end_time = AV_NOPTS_VALUE;
1899 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1903 avio_seek(ic->pb, offset, SEEK_SET);
1906 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1910 ret = av_read_packet(ic, pkt);
1911 } while(ret == AVERROR(EAGAIN));
1914 read_size += pkt->size;
1915 st = ic->streams[pkt->stream_index];
1916 if (pkt->pts != AV_NOPTS_VALUE &&
1917 (st->start_time != AV_NOPTS_VALUE ||
1918 st->first_dts != AV_NOPTS_VALUE)) {
1919 duration = end_time = pkt->pts;
1920 if (st->start_time != AV_NOPTS_VALUE)
1921 duration -= st->start_time;
1923 duration -= st->first_dts;
1925 duration += 1LL<<st->pts_wrap_bits;
1927 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1928 st->duration = duration;
1931 av_free_packet(pkt);
1933 }while( end_time==AV_NOPTS_VALUE
1934 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1935 && ++retry <= DURATION_MAX_RETRY);
1937 fill_all_stream_timings(ic);
1939 avio_seek(ic->pb, old_offset, SEEK_SET);
1940 for (i=0; i<ic->nb_streams; i++) {
1942 st->cur_dts= st->first_dts;
1943 st->last_IP_pts = AV_NOPTS_VALUE;
1944 st->reference_dts = AV_NOPTS_VALUE;
1948 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
1952 /* get the file size, if possible */
1953 if (ic->iformat->flags & AVFMT_NOFILE) {
1956 file_size = avio_size(ic->pb);
1957 file_size = FFMAX(0, file_size);
1960 if ((!strcmp(ic->iformat->name, "mpeg") ||
1961 !strcmp(ic->iformat->name, "mpegts")) &&
1962 file_size && ic->pb->seekable) {
1963 /* get accurate estimate from the PTSes */
1964 estimate_timings_from_pts(ic, old_offset);
1965 } else if (has_duration(ic)) {
1966 /* at least one component has timings - we use them for all
1968 fill_all_stream_timings(ic);
1970 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
1971 /* less precise: use bitrate info */
1972 estimate_timings_from_bit_rate(ic);
1974 update_stream_timings(ic);
1978 AVStream av_unused *st;
1979 for(i = 0;i < ic->nb_streams; i++) {
1980 st = ic->streams[i];
1981 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
1982 (double) st->start_time / AV_TIME_BASE,
1983 (double) st->duration / AV_TIME_BASE);
1985 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1986 (double) ic->start_time / AV_TIME_BASE,
1987 (double) ic->duration / AV_TIME_BASE,
1988 ic->bit_rate / 1000);
1992 static int has_codec_parameters(AVCodecContext *avctx)
1995 switch (avctx->codec_type) {
1996 case AVMEDIA_TYPE_AUDIO:
1997 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
1998 if (!avctx->frame_size &&
1999 (avctx->codec_id == CODEC_ID_AAC ||
2000 avctx->codec_id == CODEC_ID_MP1 ||
2001 avctx->codec_id == CODEC_ID_MP2 ||
2002 avctx->codec_id == CODEC_ID_MP3 ||
2003 avctx->codec_id == CODEC_ID_CELT))
2006 case AVMEDIA_TYPE_VIDEO:
2007 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2013 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2016 static int has_decode_delay_been_guessed(AVStream *st)
2018 return st->codec->codec_id != CODEC_ID_H264 ||
2019 st->info->nb_decoded_frames >= 6;
2022 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2023 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2026 int got_picture = 1, ret = 0;
2028 AVPacket pkt = *avpkt;
2030 if (!avcodec_is_open(st->codec)) {
2031 AVDictionary *thread_opt = NULL;
2033 codec = st->codec->codec ? st->codec->codec :
2034 avcodec_find_decoder(st->codec->codec_id);
2039 /* force thread count to 1 since the h264 decoder will not extract SPS
2040 * and PPS to extradata during multi-threaded decoding */
2041 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2042 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2044 av_dict_free(&thread_opt);
2049 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2051 (!has_codec_parameters(st->codec) ||
2052 !has_decode_delay_been_guessed(st) ||
2053 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2055 avcodec_get_frame_defaults(&picture);
2056 switch(st->codec->codec_type) {
2057 case AVMEDIA_TYPE_VIDEO:
2058 ret = avcodec_decode_video2(st->codec, &picture,
2059 &got_picture, &pkt);
2061 case AVMEDIA_TYPE_AUDIO:
2062 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2069 st->info->nb_decoded_frames++;
2078 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2080 while (tags->id != CODEC_ID_NONE) {
2088 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2091 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2092 if(tag == tags[i].tag)
2095 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2096 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2099 return CODEC_ID_NONE;
2102 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2105 for(i=0; tags && tags[i]; i++){
2106 int tag= ff_codec_get_tag(tags[i], id);
2112 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2115 for(i=0; tags && tags[i]; i++){
2116 enum CodecID id= ff_codec_get_id(tags[i], tag);
2117 if(id!=CODEC_ID_NONE) return id;
2119 return CODEC_ID_NONE;
2122 static void compute_chapters_end(AVFormatContext *s)
2125 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2127 for (i = 0; i < s->nb_chapters; i++)
2128 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2129 AVChapter *ch = s->chapters[i];
2130 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2133 for (j = 0; j < s->nb_chapters; j++) {
2134 AVChapter *ch1 = s->chapters[j];
2135 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2136 if (j != i && next_start > ch->start && next_start < end)
2139 ch->end = (end == INT64_MAX) ? ch->start : end;
2143 static int get_std_framerate(int i){
2144 if(i<60*12) return i*1001;
2145 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2149 * Is the time base unreliable.
2150 * This is a heuristic to balance between quick acceptance of the values in
2151 * the headers vs. some extra checks.
2152 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2153 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2154 * And there are "variable" fps files this needs to detect as well.
2156 static int tb_unreliable(AVCodecContext *c){
2157 if( c->time_base.den >= 101L*c->time_base.num
2158 || c->time_base.den < 5L*c->time_base.num
2159 /* || c->codec_tag == AV_RL32("DIVX")
2160 || c->codec_tag == AV_RL32("XVID")*/
2161 || c->codec_id == CODEC_ID_MPEG2VIDEO
2162 || c->codec_id == CODEC_ID_H264
2168 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2170 int i, count, ret, read_size, j;
2172 AVPacket pkt1, *pkt;
2173 int64_t old_offset = avio_tell(ic->pb);
2174 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2176 for(i=0;i<ic->nb_streams;i++) {
2178 AVDictionary *thread_opt = NULL;
2179 st = ic->streams[i];
2181 //only for the split stuff
2182 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2183 st->parser = av_parser_init(st->codec->codec_id);
2184 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2185 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2188 codec = st->codec->codec ? st->codec->codec :
2189 avcodec_find_decoder(st->codec->codec_id);
2191 /* force thread count to 1 since the h264 decoder will not extract SPS
2192 * and PPS to extradata during multi-threaded decoding */
2193 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2195 /* Ensure that subtitle_header is properly set. */
2196 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2197 && codec && !st->codec->codec)
2198 avcodec_open2(st->codec, codec, options ? &options[i]
2201 //try to just open decoders, in case this is enough to get parameters
2202 if(!has_codec_parameters(st->codec)){
2203 if (codec && !st->codec->codec)
2204 avcodec_open2(st->codec, codec, options ? &options[i]
2208 av_dict_free(&thread_opt);
2211 for (i=0; i<ic->nb_streams; i++) {
2212 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2218 if (ff_check_interrupt(&ic->interrupt_callback)){
2220 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2224 /* check if one codec still needs to be handled */
2225 for(i=0;i<ic->nb_streams;i++) {
2226 int fps_analyze_framecount = 20;
2228 st = ic->streams[i];
2229 if (!has_codec_parameters(st->codec))
2231 /* if the timebase is coarse (like the usual millisecond precision
2232 of mkv), we need to analyze more frames to reliably arrive at
2234 if (av_q2d(st->time_base) > 0.0005)
2235 fps_analyze_framecount *= 2;
2236 if (ic->fps_probe_size >= 0)
2237 fps_analyze_framecount = ic->fps_probe_size;
2238 /* variable fps and no guess at the real fps */
2239 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2240 && st->info->duration_count < fps_analyze_framecount
2241 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2243 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2245 if(st->first_dts == AV_NOPTS_VALUE)
2248 if (i == ic->nb_streams) {
2249 /* NOTE: if the format has no header, then we need to read
2250 some packets to get most of the streams, so we cannot
2252 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2253 /* if we found the info for all the codecs, we can stop */
2255 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2259 /* we did not get all the codec info, but we read too much data */
2260 if (read_size >= ic->probesize) {
2262 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2266 /* NOTE: a new stream can be added there if no header in file
2267 (AVFMTCTX_NOHEADER) */
2268 ret = read_frame_internal(ic, &pkt1);
2269 if (ret == AVERROR(EAGAIN))
2274 AVPacket empty_pkt = { 0 };
2276 av_init_packet(&empty_pkt);
2278 ret = -1; /* we could not have all the codec parameters before EOF */
2279 for(i=0;i<ic->nb_streams;i++) {
2280 st = ic->streams[i];
2282 /* flush the decoders */
2284 err = try_decode_frame(st, &empty_pkt,
2285 (options && i < orig_nb_streams) ?
2286 &options[i] : NULL);
2287 } while (err > 0 && !has_codec_parameters(st->codec));
2290 av_log(ic, AV_LOG_WARNING,
2291 "decoding for stream %d failed\n", st->index);
2292 } else if (!has_codec_parameters(st->codec)){
2294 avcodec_string(buf, sizeof(buf), st->codec, 0);
2295 av_log(ic, AV_LOG_WARNING,
2296 "Could not find codec parameters (%s)\n", buf);
2304 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2305 if ((ret = av_dup_packet(pkt)) < 0)
2306 goto find_stream_info_err;
2308 read_size += pkt->size;
2310 st = ic->streams[pkt->stream_index];
2311 if (st->codec_info_nb_frames>1) {
2312 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) {
2313 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2316 st->info->codec_info_duration += pkt->duration;
2319 int64_t last = st->info->last_dts;
2321 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2322 int64_t duration= pkt->dts - last;
2323 double dur= duration * av_q2d(st->time_base);
2325 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2326 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2327 if (st->info->duration_count < 2)
2328 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2329 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2330 int framerate= get_std_framerate(i);
2331 int ticks= lrintf(dur*framerate/(1001*12));
2332 double error = dur - (double)ticks*1001*12 / framerate;
2333 st->info->duration_error[i] += error*error;
2335 st->info->duration_count++;
2336 // ignore the first 4 values, they might have some random jitter
2337 if (st->info->duration_count > 3)
2338 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2340 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2341 st->info->last_dts = pkt->dts;
2343 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2344 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2345 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2346 st->codec->extradata_size= i;
2347 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2348 if (!st->codec->extradata)
2349 return AVERROR(ENOMEM);
2350 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2351 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2355 /* if still no information, we try to open the codec and to
2356 decompress the frame. We try to avoid that in most cases as
2357 it takes longer and uses more memory. For MPEG-4, we need to
2358 decompress for QuickTime.
2360 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2361 least one frame of codec data, this makes sure the codec initializes
2362 the channel configuration and does not only trust the values from the container.
2364 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2366 st->codec_info_nb_frames++;
2370 // close codecs which were opened in try_decode_frame()
2371 for(i=0;i<ic->nb_streams;i++) {
2372 st = ic->streams[i];
2373 avcodec_close(st->codec);
2375 for(i=0;i<ic->nb_streams;i++) {
2376 st = ic->streams[i];
2377 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2378 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2379 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2380 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2381 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2382 // the check for tb_unreliable() is not completely correct, since this is not about handling
2383 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2384 // ipmovie.c produces.
2385 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2386 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);
2387 if (st->info->duration_count && !st->r_frame_rate.num
2388 && tb_unreliable(st->codec) /*&&
2389 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2390 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2392 double best_error= 2*av_q2d(st->time_base);
2393 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2395 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2396 double error = st->info->duration_error[j] * get_std_framerate(j);
2397 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2398 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2399 if(error < best_error){
2401 num = get_std_framerate(j);
2404 // do not increase frame rate by more than 1 % in order to match a standard rate.
2405 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2406 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2408 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2409 if(!st->codec->bits_per_coded_sample)
2410 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2411 // set stream disposition based on audio service type
2412 switch (st->codec->audio_service_type) {
2413 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2414 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2415 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2416 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2417 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2418 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2419 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2420 st->disposition = AV_DISPOSITION_COMMENT; break;
2421 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2422 st->disposition = AV_DISPOSITION_KARAOKE; break;
2427 estimate_timings(ic, old_offset);
2429 compute_chapters_end(ic);
2432 /* correct DTS for B-frame streams with no timestamps */
2433 for(i=0;i<ic->nb_streams;i++) {
2434 st = ic->streams[i];
2435 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2437 ppktl = &ic->packet_buffer;
2439 if(ppkt1->stream_index != i)
2441 if(ppkt1->pkt->dts < 0)
2443 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2445 ppkt1->pkt->dts -= delta;
2450 st->cur_dts -= delta;
2456 find_stream_info_err:
2457 for (i=0; i < ic->nb_streams; i++) {
2458 if (ic->streams[i]->codec)
2459 ic->streams[i]->codec->thread_count = 0;
2460 av_freep(&ic->streams[i]->info);
2465 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2469 for (i = 0; i < ic->nb_programs; i++)
2470 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2471 if (ic->programs[i]->stream_index[j] == s)
2472 return ic->programs[i];
2476 int av_find_best_stream(AVFormatContext *ic,
2477 enum AVMediaType type,
2478 int wanted_stream_nb,
2480 AVCodec **decoder_ret,
2483 int i, nb_streams = ic->nb_streams;
2484 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2485 unsigned *program = NULL;
2486 AVCodec *decoder = NULL, *best_decoder = NULL;
2488 if (related_stream >= 0 && wanted_stream_nb < 0) {
2489 AVProgram *p = find_program_from_stream(ic, related_stream);
2491 program = p->stream_index;
2492 nb_streams = p->nb_stream_indexes;
2495 for (i = 0; i < nb_streams; i++) {
2496 int real_stream_index = program ? program[i] : i;
2497 AVStream *st = ic->streams[real_stream_index];
2498 AVCodecContext *avctx = st->codec;
2499 if (avctx->codec_type != type)
2501 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2503 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2506 decoder = avcodec_find_decoder(st->codec->codec_id);
2509 ret = AVERROR_DECODER_NOT_FOUND;
2513 if (best_count >= st->codec_info_nb_frames)
2515 best_count = st->codec_info_nb_frames;
2516 ret = real_stream_index;
2517 best_decoder = decoder;
2518 if (program && i == nb_streams - 1 && ret < 0) {
2520 nb_streams = ic->nb_streams;
2521 i = 0; /* no related stream found, try again with everything */
2525 *decoder_ret = best_decoder;
2529 /*******************************************************/
2531 int av_read_play(AVFormatContext *s)
2533 if (s->iformat->read_play)
2534 return s->iformat->read_play(s);
2536 return avio_pause(s->pb, 0);
2537 return AVERROR(ENOSYS);
2540 int av_read_pause(AVFormatContext *s)
2542 if (s->iformat->read_pause)
2543 return s->iformat->read_pause(s);
2545 return avio_pause(s->pb, 1);
2546 return AVERROR(ENOSYS);
2549 void avformat_free_context(AVFormatContext *s)
2555 if (s->iformat && s->iformat->priv_class && s->priv_data)
2556 av_opt_free(s->priv_data);
2558 for(i=0;i<s->nb_streams;i++) {
2559 /* free all data in a stream component */
2562 av_parser_close(st->parser);
2563 av_free_packet(&st->cur_pkt);
2565 if (st->attached_pic.data)
2566 av_free_packet(&st->attached_pic);
2567 av_dict_free(&st->metadata);
2568 av_free(st->index_entries);
2569 av_free(st->codec->extradata);
2570 av_free(st->codec->subtitle_header);
2572 av_free(st->priv_data);
2576 for(i=s->nb_programs-1; i>=0; i--) {
2577 av_dict_free(&s->programs[i]->metadata);
2578 av_freep(&s->programs[i]->stream_index);
2579 av_freep(&s->programs[i]);
2581 av_freep(&s->programs);
2582 av_freep(&s->priv_data);
2583 while(s->nb_chapters--) {
2584 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2585 av_free(s->chapters[s->nb_chapters]);
2587 av_freep(&s->chapters);
2588 av_dict_free(&s->metadata);
2589 av_freep(&s->streams);
2593 #if FF_API_CLOSE_INPUT_FILE
2594 void av_close_input_file(AVFormatContext *s)
2596 avformat_close_input(&s);
2600 void avformat_close_input(AVFormatContext **ps)
2602 AVFormatContext *s = *ps;
2603 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2605 flush_packet_queue(s);
2606 if (s->iformat->read_close)
2607 s->iformat->read_close(s);
2608 avformat_free_context(s);
2614 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2620 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2622 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2625 s->streams = streams;
2627 st = av_mallocz(sizeof(AVStream));
2630 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2635 st->codec = avcodec_alloc_context3(c);
2637 /* no default bitrate if decoding */
2638 st->codec->bit_rate = 0;
2640 st->index = s->nb_streams;
2641 st->start_time = AV_NOPTS_VALUE;
2642 st->duration = AV_NOPTS_VALUE;
2643 /* we set the current DTS to 0 so that formats without any timestamps
2644 but durations get some timestamps, formats with some unknown
2645 timestamps have their first few packets buffered and the
2646 timestamps corrected before they are returned to the user */
2648 st->first_dts = AV_NOPTS_VALUE;
2649 st->probe_packets = MAX_PROBE_PACKETS;
2651 /* default pts setting is MPEG-like */
2652 avpriv_set_pts_info(st, 33, 1, 90000);
2653 st->last_IP_pts = AV_NOPTS_VALUE;
2654 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2655 st->pts_buffer[i]= AV_NOPTS_VALUE;
2656 st->reference_dts = AV_NOPTS_VALUE;
2658 st->sample_aspect_ratio = (AVRational){0,1};
2660 s->streams[s->nb_streams++] = st;
2664 AVProgram *av_new_program(AVFormatContext *ac, int id)
2666 AVProgram *program=NULL;
2669 av_dlog(ac, "new_program: id=0x%04x\n", id);
2671 for(i=0; i<ac->nb_programs; i++)
2672 if(ac->programs[i]->id == id)
2673 program = ac->programs[i];
2676 program = av_mallocz(sizeof(AVProgram));
2679 dynarray_add(&ac->programs, &ac->nb_programs, program);
2680 program->discard = AVDISCARD_NONE;
2687 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2689 AVChapter *chapter = NULL;
2692 for(i=0; i<s->nb_chapters; i++)
2693 if(s->chapters[i]->id == id)
2694 chapter = s->chapters[i];
2697 chapter= av_mallocz(sizeof(AVChapter));
2700 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2702 av_dict_set(&chapter->metadata, "title", title, 0);
2704 chapter->time_base= time_base;
2705 chapter->start = start;
2711 /************************************************************/
2712 /* output media file */
2714 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2716 const AVCodecTag *avctag;
2718 enum CodecID id = CODEC_ID_NONE;
2719 unsigned int tag = 0;
2722 * Check that tag + id is in the table
2723 * If neither is in the table -> OK
2724 * If tag is in the table with another id -> FAIL
2725 * If id is in the table with another tag -> FAIL unless strict < normal
2727 for (n = 0; s->oformat->codec_tag[n]; n++) {
2728 avctag = s->oformat->codec_tag[n];
2729 while (avctag->id != CODEC_ID_NONE) {
2730 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2732 if (id == st->codec->codec_id)
2735 if (avctag->id == st->codec->codec_id)
2740 if (id != CODEC_ID_NONE)
2742 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2747 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2751 AVDictionary *tmp = NULL;
2754 av_dict_copy(&tmp, *options, 0);
2755 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2758 // some sanity checks
2759 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2760 av_log(s, AV_LOG_ERROR, "no streams\n");
2761 ret = AVERROR(EINVAL);
2765 for(i=0;i<s->nb_streams;i++) {
2768 switch (st->codec->codec_type) {
2769 case AVMEDIA_TYPE_AUDIO:
2770 if(st->codec->sample_rate<=0){
2771 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2772 ret = AVERROR(EINVAL);
2775 if(!st->codec->block_align)
2776 st->codec->block_align = st->codec->channels *
2777 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2779 case AVMEDIA_TYPE_VIDEO:
2780 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2781 av_log(s, AV_LOG_ERROR, "time base not set\n");
2782 ret = AVERROR(EINVAL);
2785 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2786 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2787 ret = AVERROR(EINVAL);
2790 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2791 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2792 "(%d/%d) and encoder layer (%d/%d)\n",
2793 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2794 st->codec->sample_aspect_ratio.num,
2795 st->codec->sample_aspect_ratio.den);
2796 ret = AVERROR(EINVAL);
2802 if(s->oformat->codec_tag){
2803 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)){
2804 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2805 st->codec->codec_tag= 0;
2807 if(st->codec->codec_tag){
2808 if (!validate_codec_tag(s, st)) {
2810 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2811 av_log(s, AV_LOG_ERROR,
2812 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2813 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2814 ret = AVERROR_INVALIDDATA;
2818 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2821 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2822 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2823 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2826 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2827 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2828 if (!s->priv_data) {
2829 ret = AVERROR(ENOMEM);
2832 if (s->oformat->priv_class) {
2833 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2834 av_opt_set_defaults(s->priv_data);
2835 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2840 /* set muxer identification string */
2841 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2842 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2845 if(s->oformat->write_header){
2846 ret = s->oformat->write_header(s);
2851 /* init PTS generation */
2852 for(i=0;i<s->nb_streams;i++) {
2853 int64_t den = AV_NOPTS_VALUE;
2856 switch (st->codec->codec_type) {
2857 case AVMEDIA_TYPE_AUDIO:
2858 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2860 case AVMEDIA_TYPE_VIDEO:
2861 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2866 if (den != AV_NOPTS_VALUE) {
2868 ret = AVERROR_INVALIDDATA;
2871 frac_init(&st->pts, 0, 0, den);
2876 av_dict_free(options);
2885 //FIXME merge with compute_pkt_fields
2886 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2887 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2888 int num, den, frame_size, i;
2890 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2891 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2893 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2894 return AVERROR(EINVAL);*/
2896 /* duration field */
2897 if (pkt->duration == 0) {
2898 compute_frame_duration(&num, &den, st, NULL, pkt);
2900 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2904 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2907 //XXX/FIXME this is a temporary hack until all encoders output pts
2908 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2910 // pkt->pts= st->cur_dts;
2911 pkt->pts= st->pts.val;
2914 //calculate dts from pts
2915 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2916 st->pts_buffer[0]= pkt->pts;
2917 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2918 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2919 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2920 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2922 pkt->dts= st->pts_buffer[0];
2925 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2926 av_log(s, AV_LOG_ERROR,
2927 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2928 st->index, st->cur_dts, pkt->dts);
2929 return AVERROR(EINVAL);
2931 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2932 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2933 return AVERROR(EINVAL);
2936 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2937 st->cur_dts= pkt->dts;
2938 st->pts.val= pkt->dts;
2941 switch (st->codec->codec_type) {
2942 case AVMEDIA_TYPE_AUDIO:
2943 frame_size = get_audio_frame_size(st->codec, pkt->size);
2945 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2946 likely equal to the encoder delay, but it would be better if we
2947 had the real timestamps from the encoder */
2948 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2949 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2952 case AVMEDIA_TYPE_VIDEO:
2953 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2961 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2966 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
2967 return s->oformat->write_packet(s, pkt);
2971 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2973 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2976 ret= s->oformat->write_packet(s, pkt);
2979 s->streams[pkt->stream_index]->nb_frames++;
2983 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2984 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2986 AVPacketList **next_point, *this_pktl;
2988 this_pktl = av_mallocz(sizeof(AVPacketList));
2989 this_pktl->pkt= *pkt;
2990 pkt->destruct= NULL; // do not free original but only the copy
2991 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
2993 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
2994 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
2996 next_point = &s->packet_buffer;
2999 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3000 while(!compare(s, &(*next_point)->pkt, pkt)){
3001 next_point= &(*next_point)->next;
3005 next_point = &(s->packet_buffer_end->next);
3008 assert(!*next_point);
3010 s->packet_buffer_end= this_pktl;
3013 this_pktl->next= *next_point;
3015 s->streams[pkt->stream_index]->last_in_packet_buffer=
3016 *next_point= this_pktl;
3019 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3021 AVStream *st = s->streams[ pkt ->stream_index];
3022 AVStream *st2= s->streams[ next->stream_index];
3023 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3027 return pkt->stream_index < next->stream_index;
3031 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3037 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3040 for(i=0; i < s->nb_streams; i++)
3041 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3043 if(stream_count && (s->nb_streams == stream_count || flush)){
3044 pktl= s->packet_buffer;
3047 s->packet_buffer= pktl->next;
3048 if(!s->packet_buffer)
3049 s->packet_buffer_end= NULL;
3051 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3052 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3056 av_init_packet(out);
3062 * Interleave an AVPacket correctly so it can be muxed.
3063 * @param out the interleaved packet will be output here
3064 * @param in the input packet
3065 * @param flush 1 if no further packets are available as input and all
3066 * remaining packets should be output
3067 * @return 1 if a packet was output, 0 if no packet could be output,
3068 * < 0 if an error occurred
3070 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3071 if (s->oformat->interleave_packet) {
3072 int ret = s->oformat->interleave_packet(s, out, in, flush);
3077 return av_interleave_packet_per_dts(s, out, in, flush);
3080 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3081 AVStream *st= s->streams[ pkt->stream_index];
3084 //FIXME/XXX/HACK drop zero sized packets
3085 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3088 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3089 pkt->size, pkt->dts, pkt->pts);
3090 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3093 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3094 return AVERROR(EINVAL);
3098 int ret= interleave_packet(s, &opkt, pkt, 0);
3099 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3102 ret= s->oformat->write_packet(s, &opkt);
3104 s->streams[opkt.stream_index]->nb_frames++;
3106 av_free_packet(&opkt);
3114 int av_write_trailer(AVFormatContext *s)
3120 ret= interleave_packet(s, &pkt, NULL, 1);
3121 if(ret<0) //FIXME cleanup needed for ret<0 ?
3126 ret= s->oformat->write_packet(s, &pkt);
3128 s->streams[pkt.stream_index]->nb_frames++;
3130 av_free_packet(&pkt);
3136 if(s->oformat->write_trailer)
3137 ret = s->oformat->write_trailer(s);
3139 for(i=0;i<s->nb_streams;i++) {
3140 av_freep(&s->streams[i]->priv_data);
3141 av_freep(&s->streams[i]->index_entries);
3143 if (s->oformat->priv_class)
3144 av_opt_free(s->priv_data);
3145 av_freep(&s->priv_data);
3149 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3152 AVProgram *program=NULL;
3155 if (idx >= ac->nb_streams) {
3156 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3160 for(i=0; i<ac->nb_programs; i++){
3161 if(ac->programs[i]->id != progid)
3163 program = ac->programs[i];
3164 for(j=0; j<program->nb_stream_indexes; j++)
3165 if(program->stream_index[j] == idx)
3168 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3171 program->stream_index = tmp;
3172 program->stream_index[program->nb_stream_indexes++] = idx;
3177 static void print_fps(double d, const char *postfix){
3178 uint64_t v= lrintf(d*100);
3179 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3180 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3181 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3184 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3186 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3187 AVDictionaryEntry *tag=NULL;
3189 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3190 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3191 if(strcmp("language", tag->key))
3192 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3197 /* "user interface" functions */
3198 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3201 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3202 AVStream *st = ic->streams[i];
3203 int g = av_gcd(st->time_base.num, st->time_base.den);
3204 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3205 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3206 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3207 /* the pid is an important information, so we display it */
3208 /* XXX: add a generic system */
3209 if (flags & AVFMT_SHOW_IDS)
3210 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3212 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3213 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3214 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3215 if (st->sample_aspect_ratio.num && // default
3216 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3217 AVRational display_aspect_ratio;
3218 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3219 st->codec->width*st->sample_aspect_ratio.num,
3220 st->codec->height*st->sample_aspect_ratio.den,
3222 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3223 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3224 display_aspect_ratio.num, display_aspect_ratio.den);
3226 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3227 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3228 print_fps(av_q2d(st->avg_frame_rate), "fps");
3229 if(st->r_frame_rate.den && st->r_frame_rate.num)
3230 print_fps(av_q2d(st->r_frame_rate), "tbr");
3231 if(st->time_base.den && st->time_base.num)
3232 print_fps(1/av_q2d(st->time_base), "tbn");
3233 if(st->codec->time_base.den && st->codec->time_base.num)
3234 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3236 if (st->disposition & AV_DISPOSITION_DEFAULT)
3237 av_log(NULL, AV_LOG_INFO, " (default)");
3238 if (st->disposition & AV_DISPOSITION_DUB)
3239 av_log(NULL, AV_LOG_INFO, " (dub)");
3240 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3241 av_log(NULL, AV_LOG_INFO, " (original)");
3242 if (st->disposition & AV_DISPOSITION_COMMENT)
3243 av_log(NULL, AV_LOG_INFO, " (comment)");
3244 if (st->disposition & AV_DISPOSITION_LYRICS)
3245 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3246 if (st->disposition & AV_DISPOSITION_KARAOKE)
3247 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3248 if (st->disposition & AV_DISPOSITION_FORCED)
3249 av_log(NULL, AV_LOG_INFO, " (forced)");
3250 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3251 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3252 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3253 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3254 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3255 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3256 av_log(NULL, AV_LOG_INFO, "\n");
3257 dump_metadata(NULL, st->metadata, " ");
3260 void av_dump_format(AVFormatContext *ic,
3266 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3267 if (ic->nb_streams && !printed)
3270 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3271 is_output ? "Output" : "Input",
3273 is_output ? ic->oformat->name : ic->iformat->name,
3274 is_output ? "to" : "from", url);
3275 dump_metadata(NULL, ic->metadata, " ");
3277 av_log(NULL, AV_LOG_INFO, " Duration: ");
3278 if (ic->duration != AV_NOPTS_VALUE) {
3279 int hours, mins, secs, us;
3280 secs = ic->duration / AV_TIME_BASE;
3281 us = ic->duration % AV_TIME_BASE;
3286 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3287 (100 * us) / AV_TIME_BASE);
3289 av_log(NULL, AV_LOG_INFO, "N/A");
3291 if (ic->start_time != AV_NOPTS_VALUE) {
3293 av_log(NULL, AV_LOG_INFO, ", start: ");
3294 secs = ic->start_time / AV_TIME_BASE;
3295 us = abs(ic->start_time % AV_TIME_BASE);
3296 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3297 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3299 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3301 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3303 av_log(NULL, AV_LOG_INFO, "N/A");
3305 av_log(NULL, AV_LOG_INFO, "\n");
3307 for (i = 0; i < ic->nb_chapters; i++) {
3308 AVChapter *ch = ic->chapters[i];
3309 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3310 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3311 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3313 dump_metadata(NULL, ch->metadata, " ");
3315 if(ic->nb_programs) {
3316 int j, k, total = 0;
3317 for(j=0; j<ic->nb_programs; j++) {
3318 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3320 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3321 name ? name->value : "");
3322 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3323 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3324 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3325 printed[ic->programs[j]->stream_index[k]] = 1;
3327 total += ic->programs[j]->nb_stream_indexes;
3329 if (total < ic->nb_streams)
3330 av_log(NULL, AV_LOG_INFO, " No Program\n");
3332 for(i=0;i<ic->nb_streams;i++)
3334 dump_stream_format(ic, i, index, is_output);
3339 int64_t av_gettime(void)
3342 gettimeofday(&tv,NULL);
3343 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3346 uint64_t ff_ntp_time(void)
3348 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3351 int av_get_frame_filename(char *buf, int buf_size,
3352 const char *path, int number)
3355 char *q, buf1[20], c;
3356 int nd, len, percentd_found;
3368 while (isdigit(*p)) {
3369 nd = nd * 10 + *p++ - '0';
3372 } while (isdigit(c));
3381 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3383 if ((q - buf + len) > buf_size - 1)
3385 memcpy(q, buf1, len);
3393 if ((q - buf) < buf_size - 1)
3397 if (!percentd_found)
3406 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3410 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3412 for(i=0;i<size;i+=16) {
3419 PRINT(" %02x", buf[i+j]);
3424 for(j=0;j<len;j++) {
3426 if (c < ' ' || c > '~')
3435 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3437 hex_dump_internal(NULL, f, 0, buf, size);
3440 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3442 hex_dump_internal(avcl, NULL, level, buf, size);
3445 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3448 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3449 PRINT("stream #%d:\n", pkt->stream_index);
3450 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3451 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3452 /* DTS is _always_ valid after av_read_frame() */
3454 if (pkt->dts == AV_NOPTS_VALUE)
3457 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3458 /* PTS may not be known if B-frames are present. */
3460 if (pkt->pts == AV_NOPTS_VALUE)
3463 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3465 PRINT(" size=%d\n", pkt->size);
3468 av_hex_dump(f, pkt->data, pkt->size);
3471 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3473 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3476 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3479 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3482 void av_url_split(char *proto, int proto_size,
3483 char *authorization, int authorization_size,
3484 char *hostname, int hostname_size,
3486 char *path, int path_size,
3489 const char *p, *ls, *at, *col, *brk;
3491 if (port_ptr) *port_ptr = -1;
3492 if (proto_size > 0) proto[0] = 0;
3493 if (authorization_size > 0) authorization[0] = 0;
3494 if (hostname_size > 0) hostname[0] = 0;
3495 if (path_size > 0) path[0] = 0;
3497 /* parse protocol */
3498 if ((p = strchr(url, ':'))) {
3499 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3504 /* no protocol means plain filename */
3505 av_strlcpy(path, url, path_size);
3509 /* separate path from hostname */
3510 ls = strchr(p, '/');
3512 ls = strchr(p, '?');
3514 av_strlcpy(path, ls, path_size);
3516 ls = &p[strlen(p)]; // XXX
3518 /* the rest is hostname, use that to parse auth/port */
3520 /* authorization (user[:pass]@hostname) */
3521 if ((at = strchr(p, '@')) && at < ls) {
3522 av_strlcpy(authorization, p,
3523 FFMIN(authorization_size, at + 1 - p));
3524 p = at + 1; /* skip '@' */
3527 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3529 av_strlcpy(hostname, p + 1,
3530 FFMIN(hostname_size, brk - p));
3531 if (brk[1] == ':' && port_ptr)
3532 *port_ptr = atoi(brk + 2);
3533 } else if ((col = strchr(p, ':')) && col < ls) {
3534 av_strlcpy(hostname, p,
3535 FFMIN(col + 1 - p, hostname_size));
3536 if (port_ptr) *port_ptr = atoi(col + 1);
3538 av_strlcpy(hostname, p,
3539 FFMIN(ls + 1 - p, hostname_size));
3543 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3546 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3549 'C', 'D', 'E', 'F' };
3550 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3553 'c', 'd', 'e', 'f' };
3554 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3556 for(i = 0; i < s; i++) {
3557 buff[i * 2] = hex_table[src[i] >> 4];
3558 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3564 int ff_hex_to_data(uint8_t *data, const char *p)
3571 p += strspn(p, SPACE_CHARS);
3574 c = toupper((unsigned char) *p++);
3575 if (c >= '0' && c <= '9')
3577 else if (c >= 'A' && c <= 'F')
3592 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3593 unsigned int pts_num, unsigned int pts_den)
3596 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3597 if(new_tb.num != pts_num)
3598 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3600 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3602 if(new_tb.num <= 0 || new_tb.den <= 0) {
3603 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3606 s->time_base = new_tb;
3607 s->pts_wrap_bits = pts_wrap_bits;
3610 int ff_url_join(char *str, int size, const char *proto,
3611 const char *authorization, const char *hostname,
3612 int port, const char *fmt, ...)
3615 struct addrinfo hints, *ai;
3620 av_strlcatf(str, size, "%s://", proto);
3621 if (authorization && authorization[0])
3622 av_strlcatf(str, size, "%s@", authorization);
3623 #if CONFIG_NETWORK && defined(AF_INET6)
3624 /* Determine if hostname is a numerical IPv6 address,
3625 * properly escape it within [] in that case. */
3626 memset(&hints, 0, sizeof(hints));
3627 hints.ai_flags = AI_NUMERICHOST;
3628 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3629 if (ai->ai_family == AF_INET6) {
3630 av_strlcat(str, "[", size);
3631 av_strlcat(str, hostname, size);
3632 av_strlcat(str, "]", size);
3634 av_strlcat(str, hostname, size);
3639 /* Not an IPv6 address, just output the plain string. */
3640 av_strlcat(str, hostname, size);
3643 av_strlcatf(str, size, ":%d", port);
3646 int len = strlen(str);
3649 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3655 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3656 AVFormatContext *src)
3661 local_pkt.stream_index = dst_stream;
3662 if (pkt->pts != AV_NOPTS_VALUE)
3663 local_pkt.pts = av_rescale_q(pkt->pts,
3664 src->streams[pkt->stream_index]->time_base,
3665 dst->streams[dst_stream]->time_base);
3666 if (pkt->dts != AV_NOPTS_VALUE)
3667 local_pkt.dts = av_rescale_q(pkt->dts,
3668 src->streams[pkt->stream_index]->time_base,
3669 dst->streams[dst_stream]->time_base);
3670 return av_write_frame(dst, &local_pkt);
3673 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3676 const char *ptr = str;
3678 /* Parse key=value pairs. */
3681 char *dest = NULL, *dest_end;
3682 int key_len, dest_len = 0;
3684 /* Skip whitespace and potential commas. */
3685 while (*ptr && (isspace(*ptr) || *ptr == ','))
3692 if (!(ptr = strchr(key, '=')))
3695 key_len = ptr - key;
3697 callback_get_buf(context, key, key_len, &dest, &dest_len);
3698 dest_end = dest + dest_len - 1;
3702 while (*ptr && *ptr != '\"') {
3706 if (dest && dest < dest_end)
3710 if (dest && dest < dest_end)
3718 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3719 if (dest && dest < dest_end)
3727 int ff_find_stream_index(AVFormatContext *s, int id)
3730 for (i = 0; i < s->nb_streams; i++) {
3731 if (s->streams[i]->id == id)
3737 void ff_make_absolute_url(char *buf, int size, const char *base,
3741 /* Absolute path, relative to the current server */
3742 if (base && strstr(base, "://") && rel[0] == '/') {
3744 av_strlcpy(buf, base, size);
3745 sep = strstr(buf, "://");
3748 sep = strchr(sep, '/');
3752 av_strlcat(buf, rel, size);
3755 /* If rel actually is an absolute url, just copy it */
3756 if (!base || strstr(rel, "://") || rel[0] == '/') {
3757 av_strlcpy(buf, rel, size);
3761 av_strlcpy(buf, base, size);
3762 /* Remove the file name from the base url */
3763 sep = strrchr(buf, '/');
3768 while (av_strstart(rel, "../", NULL) && sep) {
3769 /* Remove the path delimiter at the end */
3771 sep = strrchr(buf, '/');
3772 /* If the next directory name to pop off is "..", break here */
3773 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3774 /* Readd the slash we just removed */
3775 av_strlcat(buf, "/", size);
3778 /* Cut off the directory name */
3785 av_strlcat(buf, rel, size);
3788 int64_t ff_iso8601_to_unix_time(const char *datestr)
3791 struct tm time1 = {0}, time2 = {0};
3793 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3794 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3796 return av_timegm(&time2);
3798 return av_timegm(&time1);
3800 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3801 "the date string.\n");
3806 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3809 if (ofmt->query_codec)
3810 return ofmt->query_codec(codec_id, std_compliance);
3811 else if (ofmt->codec_tag)
3812 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3813 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3814 codec_id == ofmt->subtitle_codec)
3817 return AVERROR_PATCHWELCOME;
3820 int avformat_network_init(void)
3824 ff_network_inited_globally = 1;
3825 if ((ret = ff_network_init()) < 0)
3832 int avformat_network_deinit(void)
3841 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3842 uint64_t channel_layout, int32_t sample_rate,
3843 int32_t width, int32_t height)
3849 return AVERROR(EINVAL);
3852 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3854 if (channel_layout) {
3856 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3860 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3862 if (width || height) {
3864 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3866 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3868 return AVERROR(ENOMEM);
3869 bytestream_put_le32(&data, flags);
3871 bytestream_put_le32(&data, channels);
3873 bytestream_put_le64(&data, channel_layout);
3875 bytestream_put_le32(&data, sample_rate);
3876 if (width || height) {
3877 bytestream_put_le32(&data, width);
3878 bytestream_put_le32(&data, height);
3883 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3885 return ff_codec_bmp_tags;
3887 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3889 return ff_codec_wav_tags;