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->codec_id == CODEC_ID_VORBIS)
707 if (enc->frame_size <= 1) {
708 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
710 if (bits_per_sample) {
711 if (enc->channels == 0)
713 frame_size = (size << 3) / (bits_per_sample * enc->channels);
715 /* used for example by ADPCM codecs */
716 if (enc->bit_rate == 0)
718 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
721 frame_size = enc->frame_size;
728 * Return the frame duration in seconds. Return 0 if not available.
730 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
731 AVCodecParserContext *pc, AVPacket *pkt)
737 switch(st->codec->codec_type) {
738 case AVMEDIA_TYPE_VIDEO:
739 if (st->r_frame_rate.num) {
740 *pnum = st->r_frame_rate.den;
741 *pden = st->r_frame_rate.num;
742 } else if(st->time_base.num*1000LL > st->time_base.den) {
743 *pnum = st->time_base.num;
744 *pden = st->time_base.den;
745 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
746 *pnum = st->codec->time_base.num;
747 *pden = st->codec->time_base.den;
748 if (pc && pc->repeat_pict) {
749 *pnum = (*pnum) * (1 + pc->repeat_pict);
751 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
752 //Thus if we have no parser in such case leave duration undefined.
753 if(st->codec->ticks_per_frame>1 && !pc){
758 case AVMEDIA_TYPE_AUDIO:
759 frame_size = get_audio_frame_size(st->codec, pkt->size);
760 if (frame_size <= 0 || st->codec->sample_rate <= 0)
763 *pden = st->codec->sample_rate;
770 static int is_intra_only(AVCodecContext *enc){
771 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
773 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
774 switch(enc->codec_id){
776 case CODEC_ID_MJPEGB:
778 case CODEC_ID_PRORES:
779 case CODEC_ID_RAWVIDEO:
780 case CODEC_ID_DVVIDEO:
781 case CODEC_ID_HUFFYUV:
782 case CODEC_ID_FFVHUFF:
787 case CODEC_ID_JPEG2000:
795 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
796 int64_t dts, int64_t pts)
798 AVStream *st= s->streams[stream_index];
799 AVPacketList *pktl= s->packet_buffer;
801 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
804 st->first_dts= dts - st->cur_dts;
807 for(; pktl; pktl= pktl->next){
808 if(pktl->pkt.stream_index != stream_index)
810 //FIXME think more about this check
811 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
812 pktl->pkt.pts += st->first_dts;
814 if(pktl->pkt.dts != AV_NOPTS_VALUE)
815 pktl->pkt.dts += st->first_dts;
817 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
818 st->start_time= pktl->pkt.pts;
820 if (st->start_time == AV_NOPTS_VALUE)
821 st->start_time = pts;
824 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
826 AVPacketList *pktl= s->packet_buffer;
829 if(st->first_dts != AV_NOPTS_VALUE){
830 cur_dts= st->first_dts;
831 for(; pktl; pktl= pktl->next){
832 if(pktl->pkt.stream_index == pkt->stream_index){
833 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
835 cur_dts -= pkt->duration;
838 pktl= s->packet_buffer;
839 st->first_dts = cur_dts;
840 }else if(st->cur_dts)
843 for(; pktl; pktl= pktl->next){
844 if(pktl->pkt.stream_index != pkt->stream_index)
846 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
847 && !pktl->pkt.duration){
848 pktl->pkt.dts= cur_dts;
849 if(!st->codec->has_b_frames)
850 pktl->pkt.pts= cur_dts;
851 cur_dts += pkt->duration;
852 pktl->pkt.duration= pkt->duration;
856 if(st->first_dts == AV_NOPTS_VALUE)
857 st->cur_dts= cur_dts;
860 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
861 AVCodecParserContext *pc, AVPacket *pkt)
863 int num, den, presentation_delayed, delay, i;
866 if (s->flags & AVFMT_FLAG_NOFILLIN)
869 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
870 pkt->dts= AV_NOPTS_VALUE;
872 /* do we have a video B-frame ? */
873 delay= st->codec->has_b_frames;
874 presentation_delayed = 0;
876 /* XXX: need has_b_frame, but cannot get it if the codec is
879 pc && pc->pict_type != AV_PICTURE_TYPE_B)
880 presentation_delayed = 1;
882 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
883 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
884 pkt->dts -= 1LL<<st->pts_wrap_bits;
887 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
888 // we take the conservative approach and discard both
889 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
890 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
891 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
892 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
895 if (pkt->duration == 0) {
896 compute_frame_duration(&num, &den, st, pc, pkt);
898 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
900 if(pkt->duration != 0 && s->packet_buffer)
901 update_initial_durations(s, st, pkt);
905 /* correct timestamps with byte offset if demuxers only have timestamps
906 on packet boundaries */
907 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
908 /* this will estimate bitrate based on this frame's duration and size */
909 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
910 if(pkt->pts != AV_NOPTS_VALUE)
912 if(pkt->dts != AV_NOPTS_VALUE)
916 if (pc && pc->dts_sync_point >= 0) {
917 // we have synchronization info from the parser
918 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
920 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
921 if (pkt->dts != AV_NOPTS_VALUE) {
922 // got DTS from the stream, update reference timestamp
923 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
924 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
925 } else if (st->reference_dts != AV_NOPTS_VALUE) {
926 // compute DTS based on reference timestamp
927 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
928 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
930 if (pc->dts_sync_point > 0)
931 st->reference_dts = pkt->dts; // new reference
935 /* This may be redundant, but it should not hurt. */
936 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
937 presentation_delayed = 1;
939 // 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);
940 /* interpolate PTS and DTS if they are not present */
941 //We skip H264 currently because delay and has_b_frames are not reliably set
942 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
943 if (presentation_delayed) {
944 /* DTS = decompression timestamp */
945 /* PTS = presentation timestamp */
946 if (pkt->dts == AV_NOPTS_VALUE)
947 pkt->dts = st->last_IP_pts;
948 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
949 if (pkt->dts == AV_NOPTS_VALUE)
950 pkt->dts = st->cur_dts;
952 /* this is tricky: the dts must be incremented by the duration
953 of the frame we are displaying, i.e. the last I- or P-frame */
954 if (st->last_IP_duration == 0)
955 st->last_IP_duration = pkt->duration;
956 if(pkt->dts != AV_NOPTS_VALUE)
957 st->cur_dts = pkt->dts + st->last_IP_duration;
958 st->last_IP_duration = pkt->duration;
959 st->last_IP_pts= pkt->pts;
960 /* cannot compute PTS if not present (we can compute it only
961 by knowing the future */
962 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
963 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
964 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
965 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
966 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
967 pkt->pts += pkt->duration;
968 // 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);
972 /* presentation is not delayed : PTS and DTS are the same */
973 if(pkt->pts == AV_NOPTS_VALUE)
975 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
976 if(pkt->pts == AV_NOPTS_VALUE)
977 pkt->pts = st->cur_dts;
979 if(pkt->pts != AV_NOPTS_VALUE)
980 st->cur_dts = pkt->pts + pkt->duration;
984 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
985 st->pts_buffer[0]= pkt->pts;
986 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
987 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
988 if(pkt->dts == AV_NOPTS_VALUE)
989 pkt->dts= st->pts_buffer[0];
990 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
991 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
993 if(pkt->dts > st->cur_dts)
994 st->cur_dts = pkt->dts;
997 // 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);
1000 if(is_intra_only(st->codec))
1001 pkt->flags |= AV_PKT_FLAG_KEY;
1003 pkt->convergence_duration = pc->convergence_duration;
1007 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1012 av_init_packet(pkt);
1015 /* select current input stream component */
1018 if (!st->need_parsing || !st->parser) {
1019 /* no parsing needed: we just output the packet as is */
1020 /* raw data support */
1021 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1022 compute_pkt_fields(s, st, NULL, pkt);
1024 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1025 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1026 ff_reduce_index(s, st->index);
1027 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1030 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1031 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1032 st->cur_ptr, st->cur_len,
1033 st->cur_pkt.pts, st->cur_pkt.dts,
1035 st->cur_pkt.pts = AV_NOPTS_VALUE;
1036 st->cur_pkt.dts = AV_NOPTS_VALUE;
1037 /* increment read pointer */
1041 /* return packet if any */
1045 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1046 if (st->codec->sample_rate > 0) {
1047 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1048 (AVRational){ 1, st->codec->sample_rate },
1052 } else if (st->codec->time_base.num != 0 &&
1053 st->codec->time_base.den != 0) {
1054 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1055 st->codec->time_base,
1059 pkt->stream_index = st->index;
1060 pkt->pts = st->parser->pts;
1061 pkt->dts = st->parser->dts;
1062 pkt->pos = st->parser->pos;
1063 if (st->parser->key_frame == 1 ||
1064 (st->parser->key_frame == -1 &&
1065 st->parser->pict_type == AV_PICTURE_TYPE_I))
1066 pkt->flags |= AV_PKT_FLAG_KEY;
1067 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1069 pkt->destruct= st->cur_pkt.destruct;
1070 st->cur_pkt.destruct= NULL;
1071 st->cur_pkt.data = NULL;
1072 assert(st->cur_len == 0);
1074 pkt->destruct = NULL;
1076 compute_pkt_fields(s, st, st->parser, pkt);
1078 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1079 ff_reduce_index(s, st->index);
1080 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1081 0, 0, AVINDEX_KEYFRAME);
1088 av_free_packet(&st->cur_pkt);
1093 /* read next packet */
1094 ret = av_read_packet(s, &cur_pkt);
1096 if (ret == AVERROR(EAGAIN))
1098 /* return the last frames, if any */
1099 for(i = 0; i < s->nb_streams; i++) {
1101 if (st->parser && st->need_parsing) {
1102 av_parser_parse2(st->parser, st->codec,
1103 &pkt->data, &pkt->size,
1105 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1111 /* no more packets: really terminate parsing */
1114 st = s->streams[cur_pkt.stream_index];
1115 st->cur_pkt= cur_pkt;
1117 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1118 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1119 st->cur_pkt.pts < st->cur_pkt.dts){
1120 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1121 st->cur_pkt.stream_index,
1125 // av_free_packet(&st->cur_pkt);
1129 if(s->debug & FF_FDEBUG_TS)
1130 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1131 st->cur_pkt.stream_index,
1135 st->cur_pkt.duration,
1139 st->cur_ptr = st->cur_pkt.data;
1140 st->cur_len = st->cur_pkt.size;
1141 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1142 st->parser = av_parser_init(st->codec->codec_id);
1144 /* no parser available: just output the raw packets */
1145 st->need_parsing = AVSTREAM_PARSE_NONE;
1146 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1147 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1148 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1149 st->parser->flags |= PARSER_FLAG_ONCE;
1154 if(s->debug & FF_FDEBUG_TS)
1155 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1166 static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
1168 AVPacketList *pktl = s->packet_buffer;
1171 s->packet_buffer = pktl->next;
1176 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1178 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1182 return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
1183 read_frame_internal(s, pkt);
1187 AVPacketList *pktl = s->packet_buffer;
1190 AVPacket *next_pkt = &pktl->pkt;
1192 if (next_pkt->dts != AV_NOPTS_VALUE) {
1193 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1194 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1195 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1196 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1197 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1198 next_pkt->pts = pktl->pkt.dts;
1202 pktl = s->packet_buffer;
1205 /* read packet from packet buffer, if there is data */
1206 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1207 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1208 return read_from_packet_buffer(s, pkt);
1211 ret = read_frame_internal(s, pkt);
1213 if (pktl && ret != AVERROR(EAGAIN)) {
1220 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1221 &s->packet_buffer_end)) < 0)
1222 return AVERROR(ENOMEM);
1226 /* XXX: suppress the packet queue */
1227 static void flush_packet_queue(AVFormatContext *s)
1232 pktl = s->packet_buffer;
1235 s->packet_buffer = pktl->next;
1236 av_free_packet(&pktl->pkt);
1239 while(s->raw_packet_buffer){
1240 pktl = s->raw_packet_buffer;
1241 s->raw_packet_buffer = pktl->next;
1242 av_free_packet(&pktl->pkt);
1245 s->packet_buffer_end=
1246 s->raw_packet_buffer_end= NULL;
1247 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1250 /*******************************************************/
1253 int av_find_default_stream_index(AVFormatContext *s)
1255 int first_audio_index = -1;
1259 if (s->nb_streams <= 0)
1261 for(i = 0; i < s->nb_streams; i++) {
1263 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1266 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1267 first_audio_index = i;
1269 return first_audio_index >= 0 ? first_audio_index : 0;
1273 * Flush the frame reader.
1275 void ff_read_frame_flush(AVFormatContext *s)
1280 flush_packet_queue(s);
1284 /* for each stream, reset read state */
1285 for(i = 0; i < s->nb_streams; i++) {
1289 av_parser_close(st->parser);
1291 av_free_packet(&st->cur_pkt);
1293 st->last_IP_pts = AV_NOPTS_VALUE;
1294 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1295 st->reference_dts = AV_NOPTS_VALUE;
1300 st->probe_packets = MAX_PROBE_PACKETS;
1302 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1303 st->pts_buffer[j]= AV_NOPTS_VALUE;
1307 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1311 for(i = 0; i < s->nb_streams; i++) {
1312 AVStream *st = s->streams[i];
1314 st->cur_dts = av_rescale(timestamp,
1315 st->time_base.den * (int64_t)ref_st->time_base.num,
1316 st->time_base.num * (int64_t)ref_st->time_base.den);
1320 void ff_reduce_index(AVFormatContext *s, int stream_index)
1322 AVStream *st= s->streams[stream_index];
1323 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1325 if((unsigned)st->nb_index_entries >= max_entries){
1327 for(i=0; 2*i<st->nb_index_entries; i++)
1328 st->index_entries[i]= st->index_entries[2*i];
1329 st->nb_index_entries= i;
1333 int ff_add_index_entry(AVIndexEntry **index_entries,
1334 int *nb_index_entries,
1335 unsigned int *index_entries_allocated_size,
1336 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1338 AVIndexEntry *entries, *ie;
1341 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1344 entries = av_fast_realloc(*index_entries,
1345 index_entries_allocated_size,
1346 (*nb_index_entries + 1) *
1347 sizeof(AVIndexEntry));
1351 *index_entries= entries;
1353 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1356 index= (*nb_index_entries)++;
1357 ie= &entries[index];
1358 assert(index==0 || ie[-1].timestamp < timestamp);
1360 ie= &entries[index];
1361 if(ie->timestamp != timestamp){
1362 if(ie->timestamp <= timestamp)
1364 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1365 (*nb_index_entries)++;
1366 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1367 distance= ie->min_distance;
1371 ie->timestamp = timestamp;
1372 ie->min_distance= distance;
1379 int av_add_index_entry(AVStream *st,
1380 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1382 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1383 &st->index_entries_allocated_size, pos,
1384 timestamp, size, distance, flags);
1387 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1388 int64_t wanted_timestamp, int flags)
1396 //optimize appending index entries at the end
1397 if(b && entries[b-1].timestamp < wanted_timestamp)
1402 timestamp = entries[m].timestamp;
1403 if(timestamp >= wanted_timestamp)
1405 if(timestamp <= wanted_timestamp)
1408 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1410 if(!(flags & AVSEEK_FLAG_ANY)){
1411 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1412 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1421 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1424 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1425 wanted_timestamp, flags);
1428 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1430 AVInputFormat *avif= s->iformat;
1431 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1432 int64_t ts_min, ts_max, ts;
1437 if (stream_index < 0)
1440 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1443 ts_min= AV_NOPTS_VALUE;
1444 pos_limit= -1; //gcc falsely says it may be uninitialized
1446 st= s->streams[stream_index];
1447 if(st->index_entries){
1450 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()
1451 index= FFMAX(index, 0);
1452 e= &st->index_entries[index];
1454 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1456 ts_min= e->timestamp;
1457 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1463 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1464 assert(index < st->nb_index_entries);
1466 e= &st->index_entries[index];
1467 assert(e->timestamp >= target_ts);
1469 ts_max= e->timestamp;
1470 pos_limit= pos_max - e->min_distance;
1471 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1472 pos_max,pos_limit, ts_max);
1476 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1481 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1484 ff_update_cur_dts(s, st, ts);
1489 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1490 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1491 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1492 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1495 int64_t start_pos, filesize;
1498 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1500 if(ts_min == AV_NOPTS_VALUE){
1501 pos_min = s->data_offset;
1502 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1503 if (ts_min == AV_NOPTS_VALUE)
1507 if(ts_max == AV_NOPTS_VALUE){
1509 filesize = avio_size(s->pb);
1510 pos_max = filesize - 1;
1513 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1515 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1516 if (ts_max == AV_NOPTS_VALUE)
1520 int64_t tmp_pos= pos_max + 1;
1521 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1522 if(tmp_ts == AV_NOPTS_VALUE)
1526 if(tmp_pos >= filesize)
1532 if(ts_min > ts_max){
1534 }else if(ts_min == ts_max){
1539 while (pos_min < pos_limit) {
1540 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1541 pos_min, pos_max, ts_min, ts_max);
1542 assert(pos_limit <= pos_max);
1545 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1546 // interpolate position (better than dichotomy)
1547 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1548 + pos_min - approximate_keyframe_distance;
1549 }else if(no_change==1){
1550 // bisection, if interpolation failed to change min or max pos last time
1551 pos = (pos_min + pos_limit)>>1;
1553 /* linear search if bisection failed, can only happen if there
1554 are very few or no keyframes between min/max */
1559 else if(pos > pos_limit)
1563 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1568 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1569 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1570 pos_limit, start_pos, no_change);
1571 if(ts == AV_NOPTS_VALUE){
1572 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1575 assert(ts != AV_NOPTS_VALUE);
1576 if (target_ts <= ts) {
1577 pos_limit = start_pos - 1;
1581 if (target_ts >= ts) {
1587 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1588 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1590 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1592 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1593 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1594 pos, ts_min, target_ts, ts_max);
1599 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1600 int64_t pos_min, pos_max;
1604 if (stream_index < 0)
1607 st= s->streams[stream_index];
1610 pos_min = s->data_offset;
1611 pos_max = avio_size(s->pb) - 1;
1613 if (pos < pos_min) pos= pos_min;
1614 else if(pos > pos_max) pos= pos_max;
1616 avio_seek(s->pb, pos, SEEK_SET);
1619 av_update_cur_dts(s, st, ts);
1624 static int seek_frame_generic(AVFormatContext *s,
1625 int stream_index, int64_t timestamp, int flags)
1632 st = s->streams[stream_index];
1634 index = av_index_search_timestamp(st, timestamp, flags);
1636 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1639 if(index < 0 || index==st->nb_index_entries-1){
1642 if(st->nb_index_entries){
1643 assert(st->index_entries);
1644 ie= &st->index_entries[st->nb_index_entries-1];
1645 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1647 ff_update_cur_dts(s, st, ie->timestamp);
1649 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1655 read_status = av_read_frame(s, &pkt);
1656 } while (read_status == AVERROR(EAGAIN));
1657 if (read_status < 0)
1659 av_free_packet(&pkt);
1660 if(stream_index == pkt.stream_index){
1661 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1665 index = av_index_search_timestamp(st, timestamp, flags);
1670 ff_read_frame_flush(s);
1671 if (s->iformat->read_seek){
1672 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1675 ie = &st->index_entries[index];
1676 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1678 ff_update_cur_dts(s, st, ie->timestamp);
1683 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1688 if (flags & AVSEEK_FLAG_BYTE) {
1689 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1691 ff_read_frame_flush(s);
1692 return seek_frame_byte(s, stream_index, timestamp, flags);
1695 if(stream_index < 0){
1696 stream_index= av_find_default_stream_index(s);
1697 if(stream_index < 0)
1700 st= s->streams[stream_index];
1701 /* timestamp for default must be expressed in AV_TIME_BASE units */
1702 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1705 /* first, we try the format specific seek */
1706 if (s->iformat->read_seek) {
1707 ff_read_frame_flush(s);
1708 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1715 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1716 ff_read_frame_flush(s);
1717 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1718 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1719 ff_read_frame_flush(s);
1720 return seek_frame_generic(s, stream_index, timestamp, flags);
1726 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1728 if(min_ts > ts || max_ts < ts)
1731 if (s->iformat->read_seek2) {
1732 ff_read_frame_flush(s);
1733 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1736 if(s->iformat->read_timestamp){
1737 //try to seek via read_timestamp()
1740 //Fallback to old API if new is not implemented but old is
1741 //Note the old has somewat different sematics
1742 if(s->iformat->read_seek || 1)
1743 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1745 // try some generic seek like seek_frame_generic() but with new ts semantics
1748 /*******************************************************/
1751 * Return TRUE if the stream has accurate duration in any stream.
1753 * @return TRUE if the stream has accurate duration for at least one component.
1755 static int has_duration(AVFormatContext *ic)
1760 for(i = 0;i < ic->nb_streams; i++) {
1761 st = ic->streams[i];
1762 if (st->duration != AV_NOPTS_VALUE)
1769 * Estimate the stream timings from the one of each components.
1771 * Also computes the global bitrate if possible.
1773 static void update_stream_timings(AVFormatContext *ic)
1775 int64_t start_time, start_time1, end_time, end_time1;
1776 int64_t duration, duration1, filesize;
1780 start_time = INT64_MAX;
1781 end_time = INT64_MIN;
1782 duration = INT64_MIN;
1783 for(i = 0;i < ic->nb_streams; i++) {
1784 st = ic->streams[i];
1785 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1786 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1787 start_time = FFMIN(start_time, start_time1);
1788 if (st->duration != AV_NOPTS_VALUE) {
1789 end_time1 = start_time1
1790 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1791 end_time = FFMAX(end_time, end_time1);
1794 if (st->duration != AV_NOPTS_VALUE) {
1795 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1796 duration = FFMAX(duration, duration1);
1799 if (start_time != INT64_MAX) {
1800 ic->start_time = start_time;
1801 if (end_time != INT64_MIN)
1802 duration = FFMAX(duration, end_time - start_time);
1804 if (duration != INT64_MIN) {
1805 ic->duration = duration;
1806 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1807 /* compute the bitrate */
1808 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1809 (double)ic->duration;
1814 static void fill_all_stream_timings(AVFormatContext *ic)
1819 update_stream_timings(ic);
1820 for(i = 0;i < ic->nb_streams; i++) {
1821 st = ic->streams[i];
1822 if (st->start_time == AV_NOPTS_VALUE) {
1823 if(ic->start_time != AV_NOPTS_VALUE)
1824 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1825 if(ic->duration != AV_NOPTS_VALUE)
1826 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1831 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1833 int64_t filesize, duration;
1837 /* if bit_rate is already set, we believe it */
1838 if (ic->bit_rate <= 0) {
1840 for(i=0;i<ic->nb_streams;i++) {
1841 st = ic->streams[i];
1842 if (st->codec->bit_rate > 0)
1843 bit_rate += st->codec->bit_rate;
1845 ic->bit_rate = bit_rate;
1848 /* if duration is already set, we believe it */
1849 if (ic->duration == AV_NOPTS_VALUE &&
1850 ic->bit_rate != 0) {
1851 filesize = ic->pb ? avio_size(ic->pb) : 0;
1853 for(i = 0; i < ic->nb_streams; i++) {
1854 st = ic->streams[i];
1855 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1856 if (st->duration == AV_NOPTS_VALUE)
1857 st->duration = duration;
1863 #define DURATION_MAX_READ_SIZE 250000
1864 #define DURATION_MAX_RETRY 3
1866 /* only usable for MPEG-PS streams */
1867 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1869 AVPacket pkt1, *pkt = &pkt1;
1871 int read_size, i, ret;
1873 int64_t filesize, offset, duration;
1878 /* flush packet queue */
1879 flush_packet_queue(ic);
1881 for (i=0; i<ic->nb_streams; i++) {
1882 st = ic->streams[i];
1883 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1884 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1887 av_parser_close(st->parser);
1889 av_free_packet(&st->cur_pkt);
1893 /* estimate the end time (duration) */
1894 /* XXX: may need to support wrapping */
1895 filesize = ic->pb ? avio_size(ic->pb) : 0;
1896 end_time = AV_NOPTS_VALUE;
1898 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1902 avio_seek(ic->pb, offset, SEEK_SET);
1905 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1909 ret = av_read_packet(ic, pkt);
1910 } while(ret == AVERROR(EAGAIN));
1913 read_size += pkt->size;
1914 st = ic->streams[pkt->stream_index];
1915 if (pkt->pts != AV_NOPTS_VALUE &&
1916 (st->start_time != AV_NOPTS_VALUE ||
1917 st->first_dts != AV_NOPTS_VALUE)) {
1918 duration = end_time = pkt->pts;
1919 if (st->start_time != AV_NOPTS_VALUE)
1920 duration -= st->start_time;
1922 duration -= st->first_dts;
1924 duration += 1LL<<st->pts_wrap_bits;
1926 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1927 st->duration = duration;
1930 av_free_packet(pkt);
1932 }while( end_time==AV_NOPTS_VALUE
1933 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1934 && ++retry <= DURATION_MAX_RETRY);
1936 fill_all_stream_timings(ic);
1938 avio_seek(ic->pb, old_offset, SEEK_SET);
1939 for (i=0; i<ic->nb_streams; i++) {
1941 st->cur_dts= st->first_dts;
1942 st->last_IP_pts = AV_NOPTS_VALUE;
1943 st->reference_dts = AV_NOPTS_VALUE;
1947 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
1951 /* get the file size, if possible */
1952 if (ic->iformat->flags & AVFMT_NOFILE) {
1955 file_size = avio_size(ic->pb);
1956 file_size = FFMAX(0, file_size);
1959 if ((!strcmp(ic->iformat->name, "mpeg") ||
1960 !strcmp(ic->iformat->name, "mpegts")) &&
1961 file_size && ic->pb->seekable) {
1962 /* get accurate estimate from the PTSes */
1963 estimate_timings_from_pts(ic, old_offset);
1964 } else if (has_duration(ic)) {
1965 /* at least one component has timings - we use them for all
1967 fill_all_stream_timings(ic);
1969 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
1970 /* less precise: use bitrate info */
1971 estimate_timings_from_bit_rate(ic);
1973 update_stream_timings(ic);
1977 AVStream av_unused *st;
1978 for(i = 0;i < ic->nb_streams; i++) {
1979 st = ic->streams[i];
1980 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
1981 (double) st->start_time / AV_TIME_BASE,
1982 (double) st->duration / AV_TIME_BASE);
1984 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1985 (double) ic->start_time / AV_TIME_BASE,
1986 (double) ic->duration / AV_TIME_BASE,
1987 ic->bit_rate / 1000);
1991 static int has_codec_parameters(AVCodecContext *avctx)
1994 switch (avctx->codec_type) {
1995 case AVMEDIA_TYPE_AUDIO:
1996 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
1997 if (!avctx->frame_size &&
1998 (avctx->codec_id == CODEC_ID_VORBIS ||
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;