2 * various utility functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/bytestream.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/pixdesc.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
39 #include "audiointerleave.h"
53 * various utility functions for use within Libav
56 unsigned avformat_version(void)
58 return LIBAVFORMAT_VERSION_INT;
61 const char *avformat_configuration(void)
63 return LIBAV_CONFIGURATION;
66 const char *avformat_license(void)
68 #define LICENSE_PREFIX "libavformat license: "
69 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
72 /* fraction handling */
75 * f = val + (num / den) + 0.5.
77 * 'num' is normalized so that it is such as 0 <= num < den.
79 * @param f fractional number
80 * @param val integer value
81 * @param num must be >= 0
82 * @param den must be >= 1
84 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
97 * Fractional addition to f: f = f + (incr / f->den).
99 * @param f fractional number
100 * @param incr increment, can be positive or negative
102 static void frac_add(AVFrac *f, int64_t incr)
115 } else if (num >= den) {
122 /** head of registered input format linked list */
123 static AVInputFormat *first_iformat = NULL;
124 /** head of registered output format linked list */
125 static AVOutputFormat *first_oformat = NULL;
127 AVInputFormat *av_iformat_next(AVInputFormat *f)
129 if(f) return f->next;
130 else return first_iformat;
133 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
135 if(f) return f->next;
136 else return first_oformat;
139 void av_register_input_format(AVInputFormat *format)
143 while (*p != NULL) p = &(*p)->next;
148 void av_register_output_format(AVOutputFormat *format)
152 while (*p != NULL) p = &(*p)->next;
157 int av_match_ext(const char *filename, const char *extensions)
165 ext = strrchr(filename, '.');
171 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
174 if (!av_strcasecmp(ext1, ext))
184 static int match_format(const char *name, const char *names)
192 namelen = strlen(name);
193 while ((p = strchr(names, ','))) {
194 len = FFMAX(p - names, namelen);
195 if (!av_strncasecmp(name, names, len))
199 return !av_strcasecmp(name, names);
202 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
203 const char *mime_type)
205 AVOutputFormat *fmt = NULL, *fmt_found;
206 int score_max, score;
208 /* specific test for image sequences */
209 #if CONFIG_IMAGE2_MUXER
210 if (!short_name && filename &&
211 av_filename_number_test(filename) &&
212 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
213 return av_guess_format("image2", NULL, NULL);
216 /* Find the proper file type. */
219 while ((fmt = av_oformat_next(fmt))) {
221 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
223 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
225 if (filename && fmt->extensions &&
226 av_match_ext(filename, fmt->extensions)) {
229 if (score > score_max) {
237 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
238 const char *filename, const char *mime_type, enum AVMediaType type){
239 if(type == AVMEDIA_TYPE_VIDEO){
240 enum CodecID codec_id= CODEC_ID_NONE;
242 #if CONFIG_IMAGE2_MUXER
243 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
244 codec_id= ff_guess_image2_codec(filename);
247 if(codec_id == CODEC_ID_NONE)
248 codec_id= fmt->video_codec;
250 }else if(type == AVMEDIA_TYPE_AUDIO)
251 return fmt->audio_codec;
252 else if (type == AVMEDIA_TYPE_SUBTITLE)
253 return fmt->subtitle_codec;
255 return CODEC_ID_NONE;
258 AVInputFormat *av_find_input_format(const char *short_name)
260 AVInputFormat *fmt = NULL;
261 while ((fmt = av_iformat_next(fmt))) {
262 if (match_format(short_name, fmt->name))
269 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
271 int ret= av_new_packet(pkt, size);
276 pkt->pos= avio_tell(s);
278 ret= avio_read(s, pkt->data, size);
282 av_shrink_packet(pkt, ret);
287 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
292 return av_get_packet(s, pkt, size);
293 old_size = pkt->size;
294 ret = av_grow_packet(pkt, size);
297 ret = avio_read(s, pkt->data + old_size, size);
298 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
303 int av_filename_number_test(const char *filename)
306 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
309 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
311 AVProbeData lpd = *pd;
312 AVInputFormat *fmt1 = NULL, *fmt;
315 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
316 int id3len = ff_id3v2_tag_len(lpd.buf);
317 if (lpd.buf_size > id3len + 16) {
319 lpd.buf_size -= id3len;
325 while ((fmt1 = av_iformat_next(fmt1))) {
326 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
329 if (fmt1->read_probe) {
330 score = fmt1->read_probe(&lpd);
331 } else if (fmt1->extensions) {
332 if (av_match_ext(lpd.filename, fmt1->extensions)) {
336 if (score > *score_max) {
339 }else if (score == *score_max)
343 /* a hack for files with huge id3v2 tags -- try to guess by file extension. */
344 if (!fmt && is_opened && *score_max < AVPROBE_SCORE_MAX/4) {
345 while ((fmt = av_iformat_next(fmt)))
346 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
347 *score_max = AVPROBE_SCORE_MAX/4;
352 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4-1) {
353 while ((fmt = av_iformat_next(fmt)))
354 if (fmt->extensions && av_match_ext("mp3", fmt->extensions)) {
355 *score_max = AVPROBE_SCORE_MAX/4-1;
363 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
365 return av_probe_input_format2(pd, is_opened, &score);
368 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
370 static const struct {
371 const char *name; enum CodecID id; enum AVMediaType type;
373 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
374 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
375 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
376 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
377 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
378 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
379 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
380 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
383 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
387 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
388 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
389 for (i = 0; fmt_id_type[i].name; i++) {
390 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
391 st->codec->codec_id = fmt_id_type[i].id;
392 st->codec->codec_type = fmt_id_type[i].type;
400 /************************************************************/
401 /* input media file */
403 /** size of probe buffer, for guessing file type from file contents */
404 #define PROBE_BUF_MIN 2048
405 #define PROBE_BUF_MAX (1<<20)
407 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
408 const char *filename, void *logctx,
409 unsigned int offset, unsigned int max_probe_size)
411 AVProbeData pd = { filename ? filename : "", NULL, -offset };
412 unsigned char *buf = NULL;
413 int ret = 0, probe_size;
415 if (!max_probe_size) {
416 max_probe_size = PROBE_BUF_MAX;
417 } else if (max_probe_size > PROBE_BUF_MAX) {
418 max_probe_size = PROBE_BUF_MAX;
419 } else if (max_probe_size < PROBE_BUF_MIN) {
420 return AVERROR(EINVAL);
423 if (offset >= max_probe_size) {
424 return AVERROR(EINVAL);
427 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
428 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
429 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
430 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
432 if (probe_size < offset) {
436 /* read probe data */
437 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
438 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
439 /* fail if error was not end of file, otherwise, lower score */
440 if (ret != AVERROR_EOF) {
445 ret = 0; /* error was end of file, nothing read */
448 pd.buf = &buf[offset];
450 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
452 /* guess file format */
453 *fmt = av_probe_input_format2(&pd, 1, &score);
455 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
456 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
458 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
464 return AVERROR_INVALIDDATA;
467 /* rewind. reuse probe buffer to avoid seeking */
468 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
474 /* open input file and probe the format if necessary */
475 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
478 AVProbeData pd = {filename, NULL, 0};
481 s->flags |= AVFMT_FLAG_CUSTOM_IO;
483 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
484 else if (s->iformat->flags & AVFMT_NOFILE)
485 return AVERROR(EINVAL);
489 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
490 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
493 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ,
494 &s->interrupt_callback, options)) < 0)
498 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
501 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
503 AVFormatContext *s = *ps;
505 AVDictionary *tmp = NULL;
507 if (!s && !(s = avformat_alloc_context()))
508 return AVERROR(ENOMEM);
513 av_dict_copy(&tmp, *options, 0);
515 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
518 if ((ret = init_input(s, filename, &tmp)) < 0)
521 /* check filename in case an image number is expected */
522 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
523 if (!av_filename_number_test(filename)) {
524 ret = AVERROR(EINVAL);
529 s->duration = s->start_time = AV_NOPTS_VALUE;
530 av_strlcpy(s->filename, filename, sizeof(s->filename));
532 /* allocate private data */
533 if (s->iformat->priv_data_size > 0) {
534 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
535 ret = AVERROR(ENOMEM);
538 if (s->iformat->priv_class) {
539 *(const AVClass**)s->priv_data = s->iformat->priv_class;
540 av_opt_set_defaults(s->priv_data);
541 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
546 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
548 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
550 if (s->iformat->read_header)
551 if ((ret = s->iformat->read_header(s)) < 0)
554 if (s->pb && !s->data_offset)
555 s->data_offset = avio_tell(s->pb);
557 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
560 av_dict_free(options);
568 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
570 avformat_free_context(s);
575 /*******************************************************/
577 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
578 AVPacketList **plast_pktl){
579 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
584 (*plast_pktl)->next = pktl;
586 *packet_buffer = pktl;
588 /* add the packet in the buffered packet list */
594 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
600 AVPacketList *pktl = s->raw_packet_buffer;
604 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
605 !s->streams[pkt->stream_index]->probe_packets ||
606 s->raw_packet_buffer_remaining_size < pkt->size){
607 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
610 s->raw_packet_buffer = pktl->next;
611 s->raw_packet_buffer_remaining_size += pkt->size;
618 ret= s->iformat->read_packet(s, pkt);
620 if (!pktl || ret == AVERROR(EAGAIN))
622 for (i = 0; i < s->nb_streams; i++)
623 s->streams[i]->probe_packets = 0;
627 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
628 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
629 av_log(s, AV_LOG_WARNING,
630 "Dropped corrupted packet (stream = %d)\n",
636 st= s->streams[pkt->stream_index];
638 switch(st->codec->codec_type){
639 case AVMEDIA_TYPE_VIDEO:
640 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
642 case AVMEDIA_TYPE_AUDIO:
643 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
645 case AVMEDIA_TYPE_SUBTITLE:
646 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
650 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
654 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
655 s->raw_packet_buffer_remaining_size -= pkt->size;
657 if(st->codec->codec_id == CODEC_ID_PROBE){
658 AVProbeData *pd = &st->probe_data;
659 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
662 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
663 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
664 pd->buf_size += pkt->size;
665 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
667 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
668 //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
669 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
670 if(st->codec->codec_id != CODEC_ID_PROBE){
673 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
680 /**********************************************************/
683 * Get the number of samples of an audio frame. Return -1 on error.
685 static int get_audio_frame_size(AVCodecContext *enc, int size)
689 if(enc->codec_id == CODEC_ID_VORBIS)
692 if (enc->frame_size <= 1) {
693 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
695 if (bits_per_sample) {
696 if (enc->channels == 0)
698 frame_size = (size << 3) / (bits_per_sample * enc->channels);
700 /* used for example by ADPCM codecs */
701 if (enc->bit_rate == 0)
703 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
706 frame_size = enc->frame_size;
713 * Return the frame duration in seconds. Return 0 if not available.
715 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
716 AVCodecParserContext *pc, AVPacket *pkt)
722 switch(st->codec->codec_type) {
723 case AVMEDIA_TYPE_VIDEO:
724 if (st->r_frame_rate.num) {
725 *pnum = st->r_frame_rate.den;
726 *pden = st->r_frame_rate.num;
727 } else if(st->time_base.num*1000LL > st->time_base.den) {
728 *pnum = st->time_base.num;
729 *pden = st->time_base.den;
730 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
731 *pnum = st->codec->time_base.num;
732 *pden = st->codec->time_base.den;
733 if (pc && pc->repeat_pict) {
734 *pnum = (*pnum) * (1 + pc->repeat_pict);
736 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
737 //Thus if we have no parser in such case leave duration undefined.
738 if(st->codec->ticks_per_frame>1 && !pc){
743 case AVMEDIA_TYPE_AUDIO:
744 frame_size = get_audio_frame_size(st->codec, pkt->size);
745 if (frame_size <= 0 || st->codec->sample_rate <= 0)
748 *pden = st->codec->sample_rate;
755 static int is_intra_only(AVCodecContext *enc){
756 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
758 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
759 switch(enc->codec_id){
761 case CODEC_ID_MJPEGB:
763 case CODEC_ID_PRORES:
764 case CODEC_ID_RAWVIDEO:
765 case CODEC_ID_DVVIDEO:
766 case CODEC_ID_HUFFYUV:
767 case CODEC_ID_FFVHUFF:
772 case CODEC_ID_JPEG2000:
780 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
781 int64_t dts, int64_t pts)
783 AVStream *st= s->streams[stream_index];
784 AVPacketList *pktl= s->packet_buffer;
786 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
789 st->first_dts= dts - st->cur_dts;
792 for(; pktl; pktl= pktl->next){
793 if(pktl->pkt.stream_index != stream_index)
795 //FIXME think more about this check
796 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
797 pktl->pkt.pts += st->first_dts;
799 if(pktl->pkt.dts != AV_NOPTS_VALUE)
800 pktl->pkt.dts += st->first_dts;
802 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
803 st->start_time= pktl->pkt.pts;
805 if (st->start_time == AV_NOPTS_VALUE)
806 st->start_time = pts;
809 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
811 AVPacketList *pktl= s->packet_buffer;
814 if(st->first_dts != AV_NOPTS_VALUE){
815 cur_dts= st->first_dts;
816 for(; pktl; pktl= pktl->next){
817 if(pktl->pkt.stream_index == pkt->stream_index){
818 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
820 cur_dts -= pkt->duration;
823 pktl= s->packet_buffer;
824 st->first_dts = cur_dts;
825 }else if(st->cur_dts)
828 for(; pktl; pktl= pktl->next){
829 if(pktl->pkt.stream_index != pkt->stream_index)
831 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
832 && !pktl->pkt.duration){
833 pktl->pkt.dts= cur_dts;
834 if(!st->codec->has_b_frames)
835 pktl->pkt.pts= cur_dts;
836 cur_dts += pkt->duration;
837 pktl->pkt.duration= pkt->duration;
841 if(st->first_dts == AV_NOPTS_VALUE)
842 st->cur_dts= cur_dts;
845 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
846 AVCodecParserContext *pc, AVPacket *pkt)
848 int num, den, presentation_delayed, delay, i;
851 if (s->flags & AVFMT_FLAG_NOFILLIN)
854 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
855 pkt->dts= AV_NOPTS_VALUE;
857 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
858 //FIXME Set low_delay = 0 when has_b_frames = 1
859 st->codec->has_b_frames = 1;
861 /* do we have a video B-frame ? */
862 delay= st->codec->has_b_frames;
863 presentation_delayed = 0;
865 /* XXX: need has_b_frame, but cannot get it if the codec is
868 pc && pc->pict_type != AV_PICTURE_TYPE_B)
869 presentation_delayed = 1;
871 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
872 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
873 pkt->dts -= 1LL<<st->pts_wrap_bits;
876 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
877 // we take the conservative approach and discard both
878 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
879 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
880 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
881 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
884 if (pkt->duration == 0) {
885 compute_frame_duration(&num, &den, st, pc, pkt);
887 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
889 if(pkt->duration != 0 && s->packet_buffer)
890 update_initial_durations(s, st, pkt);
894 /* correct timestamps with byte offset if demuxers only have timestamps
895 on packet boundaries */
896 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
897 /* this will estimate bitrate based on this frame's duration and size */
898 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
899 if(pkt->pts != AV_NOPTS_VALUE)
901 if(pkt->dts != AV_NOPTS_VALUE)
905 if (pc && pc->dts_sync_point >= 0) {
906 // we have synchronization info from the parser
907 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
909 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
910 if (pkt->dts != AV_NOPTS_VALUE) {
911 // got DTS from the stream, update reference timestamp
912 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
913 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
914 } else if (st->reference_dts != AV_NOPTS_VALUE) {
915 // compute DTS based on reference timestamp
916 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
917 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
919 if (pc->dts_sync_point > 0)
920 st->reference_dts = pkt->dts; // new reference
924 /* This may be redundant, but it should not hurt. */
925 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
926 presentation_delayed = 1;
928 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
929 /* interpolate PTS and DTS if they are not present */
930 //We skip H264 currently because delay and has_b_frames are not reliably set
931 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
932 if (presentation_delayed) {
933 /* DTS = decompression timestamp */
934 /* PTS = presentation timestamp */
935 if (pkt->dts == AV_NOPTS_VALUE)
936 pkt->dts = st->last_IP_pts;
937 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
938 if (pkt->dts == AV_NOPTS_VALUE)
939 pkt->dts = st->cur_dts;
941 /* this is tricky: the dts must be incremented by the duration
942 of the frame we are displaying, i.e. the last I- or P-frame */
943 if (st->last_IP_duration == 0)
944 st->last_IP_duration = pkt->duration;
945 if(pkt->dts != AV_NOPTS_VALUE)
946 st->cur_dts = pkt->dts + st->last_IP_duration;
947 st->last_IP_duration = pkt->duration;
948 st->last_IP_pts= pkt->pts;
949 /* cannot compute PTS if not present (we can compute it only
950 by knowing the future */
951 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
952 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
953 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
954 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
955 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
956 pkt->pts += pkt->duration;
957 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
961 /* presentation is not delayed : PTS and DTS are the same */
962 if(pkt->pts == AV_NOPTS_VALUE)
964 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
965 if(pkt->pts == AV_NOPTS_VALUE)
966 pkt->pts = st->cur_dts;
968 if(pkt->pts != AV_NOPTS_VALUE)
969 st->cur_dts = pkt->pts + pkt->duration;
973 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
974 st->pts_buffer[0]= pkt->pts;
975 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
976 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
977 if(pkt->dts == AV_NOPTS_VALUE)
978 pkt->dts= st->pts_buffer[0];
979 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
980 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
982 if(pkt->dts > st->cur_dts)
983 st->cur_dts = pkt->dts;
986 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
989 if(is_intra_only(st->codec))
990 pkt->flags |= AV_PKT_FLAG_KEY;
993 /* keyframe computation */
994 if (pc->key_frame == 1)
995 pkt->flags |= AV_PKT_FLAG_KEY;
996 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
997 pkt->flags |= AV_PKT_FLAG_KEY;
1000 pkt->convergence_duration = pc->convergence_duration;
1004 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1009 av_init_packet(pkt);
1012 /* select current input stream component */
1015 if (!st->need_parsing || !st->parser) {
1016 /* no parsing needed: we just output the packet as is */
1017 /* raw data support */
1018 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1019 compute_pkt_fields(s, st, NULL, pkt);
1021 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1022 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1023 ff_reduce_index(s, st->index);
1024 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1027 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1028 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1029 st->cur_ptr, st->cur_len,
1030 st->cur_pkt.pts, st->cur_pkt.dts,
1032 st->cur_pkt.pts = AV_NOPTS_VALUE;
1033 st->cur_pkt.dts = AV_NOPTS_VALUE;
1034 /* increment read pointer */
1038 /* return packet if any */
1042 pkt->stream_index = st->index;
1043 pkt->pts = st->parser->pts;
1044 pkt->dts = st->parser->dts;
1045 pkt->pos = st->parser->pos;
1046 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1048 pkt->destruct= st->cur_pkt.destruct;
1049 st->cur_pkt.destruct= NULL;
1050 st->cur_pkt.data = NULL;
1051 assert(st->cur_len == 0);
1053 pkt->destruct = NULL;
1055 compute_pkt_fields(s, st, st->parser, pkt);
1057 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1058 ff_reduce_index(s, st->index);
1059 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1060 0, 0, AVINDEX_KEYFRAME);
1067 av_free_packet(&st->cur_pkt);
1072 /* read next packet */
1073 ret = av_read_packet(s, &cur_pkt);
1075 if (ret == AVERROR(EAGAIN))
1077 /* return the last frames, if any */
1078 for(i = 0; i < s->nb_streams; i++) {
1080 if (st->parser && st->need_parsing) {
1081 av_parser_parse2(st->parser, st->codec,
1082 &pkt->data, &pkt->size,
1084 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1090 /* no more packets: really terminate parsing */
1093 st = s->streams[cur_pkt.stream_index];
1094 st->cur_pkt= cur_pkt;
1096 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1097 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1098 st->cur_pkt.pts < st->cur_pkt.dts){
1099 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1100 st->cur_pkt.stream_index,
1104 // av_free_packet(&st->cur_pkt);
1108 if(s->debug & FF_FDEBUG_TS)
1109 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1110 st->cur_pkt.stream_index,
1114 st->cur_pkt.duration,
1118 st->cur_ptr = st->cur_pkt.data;
1119 st->cur_len = st->cur_pkt.size;
1120 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1121 st->parser = av_parser_init(st->codec->codec_id);
1123 /* no parser available: just output the raw packets */
1124 st->need_parsing = AVSTREAM_PARSE_NONE;
1125 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1126 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1127 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1128 st->parser->flags |= PARSER_FLAG_ONCE;
1133 if(s->debug & FF_FDEBUG_TS)
1134 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1145 static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
1147 AVPacketList *pktl = s->packet_buffer;
1150 s->packet_buffer = pktl->next;
1155 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1157 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1161 return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
1162 read_frame_internal(s, pkt);
1166 AVPacketList *pktl = s->packet_buffer;
1169 AVPacket *next_pkt = &pktl->pkt;
1171 if (next_pkt->dts != AV_NOPTS_VALUE) {
1172 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1173 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1174 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1175 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1176 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1177 next_pkt->pts = pktl->pkt.dts;
1181 pktl = s->packet_buffer;
1184 /* read packet from packet buffer, if there is data */
1185 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1186 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1187 return read_from_packet_buffer(s, pkt);
1190 ret = read_frame_internal(s, pkt);
1192 if (pktl && ret != AVERROR(EAGAIN)) {
1199 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1200 &s->packet_buffer_end)) < 0)
1201 return AVERROR(ENOMEM);
1205 /* XXX: suppress the packet queue */
1206 static void flush_packet_queue(AVFormatContext *s)
1211 pktl = s->packet_buffer;
1214 s->packet_buffer = pktl->next;
1215 av_free_packet(&pktl->pkt);
1218 while(s->raw_packet_buffer){
1219 pktl = s->raw_packet_buffer;
1220 s->raw_packet_buffer = pktl->next;
1221 av_free_packet(&pktl->pkt);
1224 s->packet_buffer_end=
1225 s->raw_packet_buffer_end= NULL;
1226 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1229 /*******************************************************/
1232 int av_find_default_stream_index(AVFormatContext *s)
1234 int first_audio_index = -1;
1238 if (s->nb_streams <= 0)
1240 for(i = 0; i < s->nb_streams; i++) {
1242 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1245 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1246 first_audio_index = i;
1248 return first_audio_index >= 0 ? first_audio_index : 0;
1252 * Flush the frame reader.
1254 void ff_read_frame_flush(AVFormatContext *s)
1259 flush_packet_queue(s);
1263 /* for each stream, reset read state */
1264 for(i = 0; i < s->nb_streams; i++) {
1268 av_parser_close(st->parser);
1270 av_free_packet(&st->cur_pkt);
1272 st->last_IP_pts = AV_NOPTS_VALUE;
1273 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1274 st->reference_dts = AV_NOPTS_VALUE;
1279 st->probe_packets = MAX_PROBE_PACKETS;
1281 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1282 st->pts_buffer[j]= AV_NOPTS_VALUE;
1286 #if FF_API_SEEK_PUBLIC
1287 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1289 ff_update_cur_dts(s, ref_st, timestamp);
1293 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1297 for(i = 0; i < s->nb_streams; i++) {
1298 AVStream *st = s->streams[i];
1300 st->cur_dts = av_rescale(timestamp,
1301 st->time_base.den * (int64_t)ref_st->time_base.num,
1302 st->time_base.num * (int64_t)ref_st->time_base.den);
1306 void ff_reduce_index(AVFormatContext *s, int stream_index)
1308 AVStream *st= s->streams[stream_index];
1309 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1311 if((unsigned)st->nb_index_entries >= max_entries){
1313 for(i=0; 2*i<st->nb_index_entries; i++)
1314 st->index_entries[i]= st->index_entries[2*i];
1315 st->nb_index_entries= i;
1319 int ff_add_index_entry(AVIndexEntry **index_entries,
1320 int *nb_index_entries,
1321 unsigned int *index_entries_allocated_size,
1322 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1324 AVIndexEntry *entries, *ie;
1327 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1330 entries = av_fast_realloc(*index_entries,
1331 index_entries_allocated_size,
1332 (*nb_index_entries + 1) *
1333 sizeof(AVIndexEntry));
1337 *index_entries= entries;
1339 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1342 index= (*nb_index_entries)++;
1343 ie= &entries[index];
1344 assert(index==0 || ie[-1].timestamp < timestamp);
1346 ie= &entries[index];
1347 if(ie->timestamp != timestamp){
1348 if(ie->timestamp <= timestamp)
1350 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1351 (*nb_index_entries)++;
1352 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1353 distance= ie->min_distance;
1357 ie->timestamp = timestamp;
1358 ie->min_distance= distance;
1365 int av_add_index_entry(AVStream *st,
1366 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1368 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1369 &st->index_entries_allocated_size, pos,
1370 timestamp, size, distance, flags);
1373 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1374 int64_t wanted_timestamp, int flags)
1382 //optimize appending index entries at the end
1383 if(b && entries[b-1].timestamp < wanted_timestamp)
1388 timestamp = entries[m].timestamp;
1389 if(timestamp >= wanted_timestamp)
1391 if(timestamp <= wanted_timestamp)
1394 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1396 if(!(flags & AVSEEK_FLAG_ANY)){
1397 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1398 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1407 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1410 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1411 wanted_timestamp, flags);
1414 #if FF_API_SEEK_PUBLIC
1415 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1416 return ff_seek_frame_binary(s, stream_index, target_ts, flags);
1420 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1422 AVInputFormat *avif= s->iformat;
1423 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1424 int64_t ts_min, ts_max, ts;
1429 if (stream_index < 0)
1432 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1435 ts_min= AV_NOPTS_VALUE;
1436 pos_limit= -1; //gcc falsely says it may be uninitialized
1438 st= s->streams[stream_index];
1439 if(st->index_entries){
1442 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()
1443 index= FFMAX(index, 0);
1444 e= &st->index_entries[index];
1446 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1448 ts_min= e->timestamp;
1449 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1455 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1456 assert(index < st->nb_index_entries);
1458 e= &st->index_entries[index];
1459 assert(e->timestamp >= target_ts);
1461 ts_max= e->timestamp;
1462 pos_limit= pos_max - e->min_distance;
1463 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1464 pos_max,pos_limit, ts_max);
1468 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1473 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1476 ff_update_cur_dts(s, st, ts);
1481 #if FF_API_SEEK_PUBLIC
1482 int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1483 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1484 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1485 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1487 return ff_gen_search(s, stream_index, target_ts, pos_min, pos_max,
1488 pos_limit, ts_min, ts_max, flags, ts_ret,
1493 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1494 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1495 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1496 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1499 int64_t start_pos, filesize;
1502 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1504 if(ts_min == AV_NOPTS_VALUE){
1505 pos_min = s->data_offset;
1506 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1507 if (ts_min == AV_NOPTS_VALUE)
1511 if(ts_max == AV_NOPTS_VALUE){
1513 filesize = avio_size(s->pb);
1514 pos_max = filesize - 1;
1517 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1519 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1520 if (ts_max == AV_NOPTS_VALUE)
1524 int64_t tmp_pos= pos_max + 1;
1525 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1526 if(tmp_ts == AV_NOPTS_VALUE)
1530 if(tmp_pos >= filesize)
1536 if(ts_min > ts_max){
1538 }else if(ts_min == ts_max){
1543 while (pos_min < pos_limit) {
1544 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1545 pos_min, pos_max, ts_min, ts_max);
1546 assert(pos_limit <= pos_max);
1549 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1550 // interpolate position (better than dichotomy)
1551 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1552 + pos_min - approximate_keyframe_distance;
1553 }else if(no_change==1){
1554 // bisection, if interpolation failed to change min or max pos last time
1555 pos = (pos_min + pos_limit)>>1;
1557 /* linear search if bisection failed, can only happen if there
1558 are very few or no keyframes between min/max */
1563 else if(pos > pos_limit)
1567 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1572 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1573 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1574 pos_limit, start_pos, no_change);
1575 if(ts == AV_NOPTS_VALUE){
1576 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1579 assert(ts != AV_NOPTS_VALUE);
1580 if (target_ts <= ts) {
1581 pos_limit = start_pos - 1;
1585 if (target_ts >= ts) {
1591 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1592 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1594 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1596 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1597 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1598 pos, ts_min, target_ts, ts_max);
1603 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1604 int64_t pos_min, pos_max;
1608 if (stream_index < 0)
1611 st= s->streams[stream_index];
1614 pos_min = s->data_offset;
1615 pos_max = avio_size(s->pb) - 1;
1617 if (pos < pos_min) pos= pos_min;
1618 else if(pos > pos_max) pos= pos_max;
1620 avio_seek(s->pb, pos, SEEK_SET);
1623 av_update_cur_dts(s, st, ts);
1628 static int seek_frame_generic(AVFormatContext *s,
1629 int stream_index, int64_t timestamp, int flags)
1636 st = s->streams[stream_index];
1638 index = av_index_search_timestamp(st, timestamp, flags);
1640 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1643 if(index < 0 || index==st->nb_index_entries-1){
1646 if(st->nb_index_entries){
1647 assert(st->index_entries);
1648 ie= &st->index_entries[st->nb_index_entries-1];
1649 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1651 ff_update_cur_dts(s, st, ie->timestamp);
1653 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1659 read_status = av_read_frame(s, &pkt);
1660 } while (read_status == AVERROR(EAGAIN));
1661 if (read_status < 0)
1663 av_free_packet(&pkt);
1664 if(stream_index == pkt.stream_index){
1665 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1669 index = av_index_search_timestamp(st, timestamp, flags);
1674 ff_read_frame_flush(s);
1675 if (s->iformat->read_seek){
1676 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1679 ie = &st->index_entries[index];
1680 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1682 ff_update_cur_dts(s, st, ie->timestamp);
1687 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1692 if (flags & AVSEEK_FLAG_BYTE) {
1693 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1695 ff_read_frame_flush(s);
1696 return seek_frame_byte(s, stream_index, timestamp, flags);
1699 if(stream_index < 0){
1700 stream_index= av_find_default_stream_index(s);
1701 if(stream_index < 0)
1704 st= s->streams[stream_index];
1705 /* timestamp for default must be expressed in AV_TIME_BASE units */
1706 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1709 /* first, we try the format specific seek */
1710 if (s->iformat->read_seek) {
1711 ff_read_frame_flush(s);
1712 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1719 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1720 ff_read_frame_flush(s);
1721 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1722 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1723 ff_read_frame_flush(s);
1724 return seek_frame_generic(s, stream_index, timestamp, flags);
1730 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1732 if(min_ts > ts || max_ts < ts)
1735 if (s->iformat->read_seek2) {
1736 ff_read_frame_flush(s);
1737 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1740 if(s->iformat->read_timestamp){
1741 //try to seek via read_timestamp()
1744 //Fallback to old API if new is not implemented but old is
1745 //Note the old has somewat different sematics
1746 if(s->iformat->read_seek || 1)
1747 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1749 // try some generic seek like seek_frame_generic() but with new ts semantics
1752 /*******************************************************/
1755 * Return TRUE if the stream has accurate duration in any stream.
1757 * @return TRUE if the stream has accurate duration for at least one component.
1759 static int has_duration(AVFormatContext *ic)
1764 for(i = 0;i < ic->nb_streams; i++) {
1765 st = ic->streams[i];
1766 if (st->duration != AV_NOPTS_VALUE)
1773 * Estimate the stream timings from the one of each components.
1775 * Also computes the global bitrate if possible.
1777 static void update_stream_timings(AVFormatContext *ic)
1779 int64_t start_time, start_time1, end_time, end_time1;
1780 int64_t duration, duration1, filesize;
1784 start_time = INT64_MAX;
1785 end_time = INT64_MIN;
1786 duration = INT64_MIN;
1787 for(i = 0;i < ic->nb_streams; i++) {
1788 st = ic->streams[i];
1789 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1790 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1791 start_time = FFMIN(start_time, start_time1);
1792 if (st->duration != AV_NOPTS_VALUE) {
1793 end_time1 = start_time1
1794 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1795 end_time = FFMAX(end_time, end_time1);
1798 if (st->duration != AV_NOPTS_VALUE) {
1799 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1800 duration = FFMAX(duration, duration1);
1803 if (start_time != INT64_MAX) {
1804 ic->start_time = start_time;
1805 if (end_time != INT64_MIN)
1806 duration = FFMAX(duration, end_time - start_time);
1808 if (duration != INT64_MIN) {
1809 ic->duration = duration;
1810 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1811 /* compute the bitrate */
1812 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1813 (double)ic->duration;
1818 static void fill_all_stream_timings(AVFormatContext *ic)
1823 update_stream_timings(ic);
1824 for(i = 0;i < ic->nb_streams; i++) {
1825 st = ic->streams[i];
1826 if (st->start_time == AV_NOPTS_VALUE) {
1827 if(ic->start_time != AV_NOPTS_VALUE)
1828 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1829 if(ic->duration != AV_NOPTS_VALUE)
1830 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1835 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1837 int64_t filesize, duration;
1841 /* if bit_rate is already set, we believe it */
1842 if (ic->bit_rate <= 0) {
1844 for(i=0;i<ic->nb_streams;i++) {
1845 st = ic->streams[i];
1846 if (st->codec->bit_rate > 0)
1847 bit_rate += st->codec->bit_rate;
1849 ic->bit_rate = bit_rate;
1852 /* if duration is already set, we believe it */
1853 if (ic->duration == AV_NOPTS_VALUE &&
1854 ic->bit_rate != 0) {
1855 filesize = ic->pb ? avio_size(ic->pb) : 0;
1857 for(i = 0; i < ic->nb_streams; i++) {
1858 st = ic->streams[i];
1859 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1860 if (st->duration == AV_NOPTS_VALUE)
1861 st->duration = duration;
1867 #define DURATION_MAX_READ_SIZE 250000
1868 #define DURATION_MAX_RETRY 3
1870 /* only usable for MPEG-PS streams */
1871 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1873 AVPacket pkt1, *pkt = &pkt1;
1875 int read_size, i, ret;
1877 int64_t filesize, offset, duration;
1882 /* flush packet queue */
1883 flush_packet_queue(ic);
1885 for (i=0; i<ic->nb_streams; i++) {
1886 st = ic->streams[i];
1887 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1888 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1891 av_parser_close(st->parser);
1893 av_free_packet(&st->cur_pkt);
1897 /* estimate the end time (duration) */
1898 /* XXX: may need to support wrapping */
1899 filesize = ic->pb ? avio_size(ic->pb) : 0;
1900 end_time = AV_NOPTS_VALUE;
1902 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1906 avio_seek(ic->pb, offset, SEEK_SET);
1909 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1913 ret = av_read_packet(ic, pkt);
1914 } while(ret == AVERROR(EAGAIN));
1917 read_size += pkt->size;
1918 st = ic->streams[pkt->stream_index];
1919 if (pkt->pts != AV_NOPTS_VALUE &&
1920 (st->start_time != AV_NOPTS_VALUE ||
1921 st->first_dts != AV_NOPTS_VALUE)) {
1922 duration = end_time = pkt->pts;
1923 if (st->start_time != AV_NOPTS_VALUE)
1924 duration -= st->start_time;
1926 duration -= st->first_dts;
1928 duration += 1LL<<st->pts_wrap_bits;
1930 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1931 st->duration = duration;
1934 av_free_packet(pkt);
1936 }while( end_time==AV_NOPTS_VALUE
1937 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1938 && ++retry <= DURATION_MAX_RETRY);
1940 fill_all_stream_timings(ic);
1942 avio_seek(ic->pb, old_offset, SEEK_SET);
1943 for (i=0; i<ic->nb_streams; i++) {
1945 st->cur_dts= st->first_dts;
1946 st->last_IP_pts = AV_NOPTS_VALUE;
1947 st->reference_dts = AV_NOPTS_VALUE;
1951 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
1955 /* get the file size, if possible */
1956 if (ic->iformat->flags & AVFMT_NOFILE) {
1959 file_size = avio_size(ic->pb);
1960 file_size = FFMAX(0, file_size);
1963 if ((!strcmp(ic->iformat->name, "mpeg") ||
1964 !strcmp(ic->iformat->name, "mpegts")) &&
1965 file_size && ic->pb->seekable) {
1966 /* get accurate estimate from the PTSes */
1967 estimate_timings_from_pts(ic, old_offset);
1968 } else if (has_duration(ic)) {
1969 /* at least one component has timings - we use them for all
1971 fill_all_stream_timings(ic);
1973 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
1974 /* less precise: use bitrate info */
1975 estimate_timings_from_bit_rate(ic);
1977 update_stream_timings(ic);
1981 AVStream av_unused *st;
1982 for(i = 0;i < ic->nb_streams; i++) {
1983 st = ic->streams[i];
1984 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
1985 (double) st->start_time / AV_TIME_BASE,
1986 (double) st->duration / AV_TIME_BASE);
1988 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1989 (double) ic->start_time / AV_TIME_BASE,
1990 (double) ic->duration / AV_TIME_BASE,
1991 ic->bit_rate / 1000);
1995 static int has_codec_parameters(AVCodecContext *avctx)
1998 switch (avctx->codec_type) {
1999 case AVMEDIA_TYPE_AUDIO:
2000 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
2001 if (!avctx->frame_size &&
2002 (avctx->codec_id == CODEC_ID_VORBIS ||
2003 avctx->codec_id == CODEC_ID_AAC ||
2004 avctx->codec_id == CODEC_ID_MP1 ||
2005 avctx->codec_id == CODEC_ID_MP2 ||
2006 avctx->codec_id == CODEC_ID_MP3 ||
2007 avctx->codec_id == CODEC_ID_CELT))
2010 case AVMEDIA_TYPE_VIDEO:
2011 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2017 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2020 static int has_decode_delay_been_guessed(AVStream *st)
2022 return st->codec->codec_id != CODEC_ID_H264 ||
2023 st->info->nb_decoded_frames >= 6;
2026 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2027 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2030 int got_picture = 1, ret = 0;
2032 AVPacket pkt = *avpkt;
2034 if(!st->codec->codec){
2035 AVDictionary *thread_opt = NULL;
2037 codec = avcodec_find_decoder(st->codec->codec_id);
2041 /* force thread count to 1 since the h264 decoder will not extract SPS
2042 * and PPS to extradata during multi-threaded decoding */
2043 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2044 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2046 av_dict_free(&thread_opt);
2051 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2053 (!has_codec_parameters(st->codec) ||
2054 !has_decode_delay_been_guessed(st) ||
2055 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2057 avcodec_get_frame_defaults(&picture);
2058 switch(st->codec->codec_type) {
2059 case AVMEDIA_TYPE_VIDEO:
2060 ret = avcodec_decode_video2(st->codec, &picture,
2061 &got_picture, &pkt);
2063 case AVMEDIA_TYPE_AUDIO:
2064 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2071 st->info->nb_decoded_frames++;
2080 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2082 while (tags->id != CODEC_ID_NONE) {
2090 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2093 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2094 if(tag == tags[i].tag)
2097 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2098 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2101 return CODEC_ID_NONE;
2104 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2107 for(i=0; tags && tags[i]; i++){
2108 int tag= ff_codec_get_tag(tags[i], id);
2114 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2117 for(i=0; tags && tags[i]; i++){
2118 enum CodecID id= ff_codec_get_id(tags[i], tag);
2119 if(id!=CODEC_ID_NONE) return id;
2121 return CODEC_ID_NONE;
2124 static void compute_chapters_end(AVFormatContext *s)
2127 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2129 for (i = 0; i < s->nb_chapters; i++)
2130 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2131 AVChapter *ch = s->chapters[i];
2132 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2135 for (j = 0; j < s->nb_chapters; j++) {
2136 AVChapter *ch1 = s->chapters[j];
2137 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2138 if (j != i && next_start > ch->start && next_start < end)
2141 ch->end = (end == INT64_MAX) ? ch->start : end;
2145 static int get_std_framerate(int i){
2146 if(i<60*12) return i*1001;
2147 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2151 * Is the time base unreliable.
2152 * This is a heuristic to balance between quick acceptance of the values in
2153 * the headers vs. some extra checks.
2154 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2155 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2156 * And there are "variable" fps files this needs to detect as well.
2158 static int tb_unreliable(AVCodecContext *c){
2159 if( c->time_base.den >= 101L*c->time_base.num
2160 || c->time_base.den < 5L*c->time_base.num
2161 /* || c->codec_tag == AV_RL32("DIVX")
2162 || c->codec_tag == AV_RL32("XVID")*/
2163 || c->codec_id == CODEC_ID_MPEG2VIDEO
2164 || c->codec_id == CODEC_ID_H264
2170 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2172 int i, count, ret, read_size, j;
2174 AVPacket pkt1, *pkt;
2175 int64_t old_offset = avio_tell(ic->pb);
2176 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2178 for(i=0;i<ic->nb_streams;i++) {
2180 AVDictionary *thread_opt = NULL;
2181 st = ic->streams[i];
2183 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2184 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2185 /* if(!st->time_base.num)
2187 if(!st->codec->time_base.num)
2188 st->codec->time_base= st->time_base;
2190 //only for the split stuff
2191 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2192 st->parser = av_parser_init(st->codec->codec_id);
2193 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2194 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2197 assert(!st->codec->codec);
2198 codec = avcodec_find_decoder(st->codec->codec_id);
2200 /* force thread count to 1 since the h264 decoder will not extract SPS
2201 * and PPS to extradata during multi-threaded decoding */
2202 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2204 /* Ensure that subtitle_header is properly set. */
2205 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2206 && codec && !st->codec->codec)
2207 avcodec_open2(st->codec, codec, options ? &options[i]
2210 //try to just open decoders, in case this is enough to get parameters
2211 if(!has_codec_parameters(st->codec)){
2212 if (codec && !st->codec->codec)
2213 avcodec_open2(st->codec, codec, options ? &options[i]
2217 av_dict_free(&thread_opt);
2220 for (i=0; i<ic->nb_streams; i++) {
2221 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2227 if (ff_check_interrupt(&ic->interrupt_callback)){
2229 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2233 /* check if one codec still needs to be handled */
2234 for(i=0;i<ic->nb_streams;i++) {
2235 int fps_analyze_framecount = 20;
2237 st = ic->streams[i];
2238 if (!has_codec_parameters(st->codec))
2240 /* if the timebase is coarse (like the usual millisecond precision
2241 of mkv), we need to analyze more frames to reliably arrive at
2243 if (av_q2d(st->time_base) > 0.0005)
2244 fps_analyze_framecount *= 2;
2245 if (ic->fps_probe_size >= 0)
2246 fps_analyze_framecount = ic->fps_probe_size;
2247 /* variable fps and no guess at the real fps */
2248 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2249 && st->info->duration_count < fps_analyze_framecount
2250 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2252 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2254 if(st->first_dts == AV_NOPTS_VALUE)
2257 if (i == ic->nb_streams) {
2258 /* NOTE: if the format has no header, then we need to read
2259 some packets to get most of the streams, so we cannot
2261 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2262 /* if we found the info for all the codecs, we can stop */
2264 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2268 /* we did not get all the codec info, but we read too much data */
2269 if (read_size >= ic->probesize) {
2271 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2275 /* NOTE: a new stream can be added there if no header in file
2276 (AVFMTCTX_NOHEADER) */
2277 ret = read_frame_internal(ic, &pkt1);
2278 if (ret == AVERROR(EAGAIN))
2283 AVPacket empty_pkt = { 0 };
2285 av_init_packet(&empty_pkt);
2287 ret = -1; /* we could not have all the codec parameters before EOF */
2288 for(i=0;i<ic->nb_streams;i++) {
2289 st = ic->streams[i];
2291 /* flush the decoders */
2293 err = try_decode_frame(st, &empty_pkt,
2294 (options && i < orig_nb_streams) ?
2295 &options[i] : NULL);
2296 } while (err > 0 && !has_codec_parameters(st->codec));
2299 av_log(ic, AV_LOG_WARNING,
2300 "decoding for stream %d failed\n", st->index);
2301 } else if (!has_codec_parameters(st->codec)){
2303 avcodec_string(buf, sizeof(buf), st->codec, 0);
2304 av_log(ic, AV_LOG_WARNING,
2305 "Could not find codec parameters (%s)\n", buf);
2313 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2314 if ((ret = av_dup_packet(pkt)) < 0)
2315 goto find_stream_info_err;
2317 read_size += pkt->size;
2319 st = ic->streams[pkt->stream_index];
2320 if (st->codec_info_nb_frames>1) {
2321 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) {
2322 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2325 st->info->codec_info_duration += pkt->duration;
2328 int64_t last = st->info->last_dts;
2330 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2331 int64_t duration= pkt->dts - last;
2332 double dur= duration * av_q2d(st->time_base);
2334 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2335 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2336 if (st->info->duration_count < 2)
2337 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2338 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2339 int framerate= get_std_framerate(i);
2340 int ticks= lrintf(dur*framerate/(1001*12));
2341 double error = dur - (double)ticks*1001*12 / framerate;
2342 st->info->duration_error[i] += error*error;
2344 st->info->duration_count++;
2345 // ignore the first 4 values, they might have some random jitter
2346 if (st->info->duration_count > 3)
2347 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2349 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2350 st->info->last_dts = pkt->dts;
2352 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2353 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2354 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2355 st->codec->extradata_size= i;
2356 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2357 if (!st->codec->extradata)
2358 return AVERROR(ENOMEM);
2359 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2360 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2364 /* if still no information, we try to open the codec and to
2365 decompress the frame. We try to avoid that in most cases as
2366 it takes longer and uses more memory. For MPEG-4, we need to
2367 decompress for QuickTime.
2369 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2370 least one frame of codec data, this makes sure the codec initializes
2371 the channel configuration and does not only trust the values from the container.
2373 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2375 st->codec_info_nb_frames++;
2379 // close codecs which were opened in try_decode_frame()
2380 for(i=0;i<ic->nb_streams;i++) {
2381 st = ic->streams[i];
2382 if(st->codec->codec)
2383 avcodec_close(st->codec);
2385 for(i=0;i<ic->nb_streams;i++) {
2386 st = ic->streams[i];
2387 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2388 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2389 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2390 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2391 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2392 // the check for tb_unreliable() is not completely correct, since this is not about handling
2393 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2394 // ipmovie.c produces.
2395 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2396 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);
2397 if (st->info->duration_count && !st->r_frame_rate.num
2398 && tb_unreliable(st->codec) /*&&
2399 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2400 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2402 double best_error= 2*av_q2d(st->time_base);
2403 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2405 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2406 double error = st->info->duration_error[j] * get_std_framerate(j);
2407 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2408 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2409 if(error < best_error){
2411 num = get_std_framerate(j);
2414 // do not increase frame rate by more than 1 % in order to match a standard rate.
2415 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2416 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2419 if (!st->r_frame_rate.num){
2420 if( st->codec->time_base.den * (int64_t)st->time_base.num
2421 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2422 st->r_frame_rate.num = st->codec->time_base.den;
2423 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2425 st->r_frame_rate.num = st->time_base.den;
2426 st->r_frame_rate.den = st->time_base.num;
2429 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2430 if(!st->codec->bits_per_coded_sample)
2431 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2432 // set stream disposition based on audio service type
2433 switch (st->codec->audio_service_type) {
2434 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2435 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2436 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2437 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2438 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2439 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2440 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2441 st->disposition = AV_DISPOSITION_COMMENT; break;
2442 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2443 st->disposition = AV_DISPOSITION_KARAOKE; break;
2448 estimate_timings(ic, old_offset);
2450 compute_chapters_end(ic);
2453 /* correct DTS for B-frame streams with no timestamps */
2454 for(i=0;i<ic->nb_streams;i++) {
2455 st = ic->streams[i];
2456 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2458 ppktl = &ic->packet_buffer;
2460 if(ppkt1->stream_index != i)
2462 if(ppkt1->pkt->dts < 0)
2464 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2466 ppkt1->pkt->dts -= delta;
2471 st->cur_dts -= delta;
2477 find_stream_info_err:
2478 for (i=0; i < ic->nb_streams; i++) {
2479 if (ic->streams[i]->codec)
2480 ic->streams[i]->codec->thread_count = 0;
2481 av_freep(&ic->streams[i]->info);
2486 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2490 for (i = 0; i < ic->nb_programs; i++)
2491 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2492 if (ic->programs[i]->stream_index[j] == s)
2493 return ic->programs[i];
2497 int av_find_best_stream(AVFormatContext *ic,
2498 enum AVMediaType type,
2499 int wanted_stream_nb,
2501 AVCodec **decoder_ret,
2504 int i, nb_streams = ic->nb_streams;
2505 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2506 unsigned *program = NULL;
2507 AVCodec *decoder = NULL, *best_decoder = NULL;
2509 if (related_stream >= 0 && wanted_stream_nb < 0) {
2510 AVProgram *p = find_program_from_stream(ic, related_stream);
2512 program = p->stream_index;
2513 nb_streams = p->nb_stream_indexes;
2516 for (i = 0; i < nb_streams; i++) {
2517 int real_stream_index = program ? program[i] : i;
2518 AVStream *st = ic->streams[real_stream_index];
2519 AVCodecContext *avctx = st->codec;
2520 if (avctx->codec_type != type)
2522 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2524 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2527 decoder = avcodec_find_decoder(st->codec->codec_id);
2530 ret = AVERROR_DECODER_NOT_FOUND;
2534 if (best_count >= st->codec_info_nb_frames)
2536 best_count = st->codec_info_nb_frames;
2537 ret = real_stream_index;
2538 best_decoder = decoder;
2539 if (program && i == nb_streams - 1 && ret < 0) {
2541 nb_streams = ic->nb_streams;
2542 i = 0; /* no related stream found, try again with everything */
2546 *decoder_ret = best_decoder;
2550 /*******************************************************/
2552 int av_read_play(AVFormatContext *s)
2554 if (s->iformat->read_play)
2555 return s->iformat->read_play(s);
2557 return avio_pause(s->pb, 0);
2558 return AVERROR(ENOSYS);
2561 int av_read_pause(AVFormatContext *s)
2563 if (s->iformat->read_pause)
2564 return s->iformat->read_pause(s);
2566 return avio_pause(s->pb, 1);
2567 return AVERROR(ENOSYS);
2570 void avformat_free_context(AVFormatContext *s)
2576 if (s->iformat && s->iformat->priv_class && s->priv_data)
2577 av_opt_free(s->priv_data);
2579 for(i=0;i<s->nb_streams;i++) {
2580 /* free all data in a stream component */
2583 av_parser_close(st->parser);
2584 av_free_packet(&st->cur_pkt);
2586 av_dict_free(&st->metadata);
2587 av_free(st->index_entries);
2588 av_free(st->codec->extradata);
2589 av_free(st->codec->subtitle_header);
2591 av_free(st->priv_data);
2595 for(i=s->nb_programs-1; i>=0; i--) {
2596 av_dict_free(&s->programs[i]->metadata);
2597 av_freep(&s->programs[i]->stream_index);
2598 av_freep(&s->programs[i]);
2600 av_freep(&s->programs);
2601 av_freep(&s->priv_data);
2602 while(s->nb_chapters--) {
2603 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2604 av_free(s->chapters[s->nb_chapters]);
2606 av_freep(&s->chapters);
2607 av_dict_free(&s->metadata);
2608 av_freep(&s->streams);
2612 #if FF_API_CLOSE_INPUT_FILE
2613 void av_close_input_file(AVFormatContext *s)
2615 avformat_close_input(&s);
2619 void avformat_close_input(AVFormatContext **ps)
2621 AVFormatContext *s = *ps;
2622 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2624 flush_packet_queue(s);
2625 if (s->iformat->read_close)
2626 s->iformat->read_close(s);
2627 avformat_free_context(s);
2633 #if FF_API_NEW_STREAM
2634 AVStream *av_new_stream(AVFormatContext *s, int id)
2636 AVStream *st = avformat_new_stream(s, NULL);
2643 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2649 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2651 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2654 s->streams = streams;
2656 st = av_mallocz(sizeof(AVStream));
2659 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2664 st->codec = avcodec_alloc_context3(c);
2666 /* no default bitrate if decoding */
2667 st->codec->bit_rate = 0;
2669 st->index = s->nb_streams;
2670 st->start_time = AV_NOPTS_VALUE;
2671 st->duration = AV_NOPTS_VALUE;
2672 /* we set the current DTS to 0 so that formats without any timestamps
2673 but durations get some timestamps, formats with some unknown
2674 timestamps have their first few packets buffered and the
2675 timestamps corrected before they are returned to the user */
2677 st->first_dts = AV_NOPTS_VALUE;
2678 st->probe_packets = MAX_PROBE_PACKETS;
2680 /* default pts setting is MPEG-like */
2681 avpriv_set_pts_info(st, 33, 1, 90000);
2682 st->last_IP_pts = AV_NOPTS_VALUE;
2683 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2684 st->pts_buffer[i]= AV_NOPTS_VALUE;
2685 st->reference_dts = AV_NOPTS_VALUE;
2687 st->sample_aspect_ratio = (AVRational){0,1};
2689 s->streams[s->nb_streams++] = st;
2693 AVProgram *av_new_program(AVFormatContext *ac, int id)
2695 AVProgram *program=NULL;
2698 av_dlog(ac, "new_program: id=0x%04x\n", id);
2700 for(i=0; i<ac->nb_programs; i++)
2701 if(ac->programs[i]->id == id)
2702 program = ac->programs[i];
2705 program = av_mallocz(sizeof(AVProgram));
2708 dynarray_add(&ac->programs, &ac->nb_programs, program);
2709 program->discard = AVDISCARD_NONE;
2716 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2718 AVChapter *chapter = NULL;
2721 for(i=0; i<s->nb_chapters; i++)
2722 if(s->chapters[i]->id == id)
2723 chapter = s->chapters[i];
2726 chapter= av_mallocz(sizeof(AVChapter));
2729 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2731 av_dict_set(&chapter->metadata, "title", title, 0);
2733 chapter->time_base= time_base;
2734 chapter->start = start;
2740 /************************************************************/
2741 /* output media file */
2743 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2745 const AVCodecTag *avctag;
2747 enum CodecID id = CODEC_ID_NONE;
2748 unsigned int tag = 0;
2751 * Check that tag + id is in the table
2752 * If neither is in the table -> OK
2753 * If tag is in the table with another id -> FAIL
2754 * If id is in the table with another tag -> FAIL unless strict < normal
2756 for (n = 0; s->oformat->codec_tag[n]; n++) {
2757 avctag = s->oformat->codec_tag[n];
2758 while (avctag->id != CODEC_ID_NONE) {
2759 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2761 if (id == st->codec->codec_id)
2764 if (avctag->id == st->codec->codec_id)
2769 if (id != CODEC_ID_NONE)
2771 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2776 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2780 AVDictionary *tmp = NULL;
2783 av_dict_copy(&tmp, *options, 0);
2784 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2787 // some sanity checks
2788 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2789 av_log(s, AV_LOG_ERROR, "no streams\n");
2790 ret = AVERROR(EINVAL);
2794 for(i=0;i<s->nb_streams;i++) {
2797 switch (st->codec->codec_type) {
2798 case AVMEDIA_TYPE_AUDIO:
2799 if(st->codec->sample_rate<=0){
2800 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2801 ret = AVERROR(EINVAL);
2804 if(!st->codec->block_align)
2805 st->codec->block_align = st->codec->channels *
2806 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2808 case AVMEDIA_TYPE_VIDEO:
2809 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2810 av_log(s, AV_LOG_ERROR, "time base not set\n");
2811 ret = AVERROR(EINVAL);
2814 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2815 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2816 ret = AVERROR(EINVAL);
2819 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2820 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2821 ret = AVERROR(EINVAL);
2827 if(s->oformat->codec_tag){
2828 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)){
2829 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2830 st->codec->codec_tag= 0;
2832 if(st->codec->codec_tag){
2833 if (!validate_codec_tag(s, st)) {
2835 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2836 av_log(s, AV_LOG_ERROR,
2837 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2838 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2839 ret = AVERROR_INVALIDDATA;
2843 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2846 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2847 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2848 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2851 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2852 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2853 if (!s->priv_data) {
2854 ret = AVERROR(ENOMEM);
2857 if (s->oformat->priv_class) {
2858 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2859 av_opt_set_defaults(s->priv_data);
2860 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2865 /* set muxer identification string */
2866 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2867 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2870 if(s->oformat->write_header){
2871 ret = s->oformat->write_header(s);
2876 /* init PTS generation */
2877 for(i=0;i<s->nb_streams;i++) {
2878 int64_t den = AV_NOPTS_VALUE;
2881 switch (st->codec->codec_type) {
2882 case AVMEDIA_TYPE_AUDIO:
2883 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2885 case AVMEDIA_TYPE_VIDEO:
2886 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2891 if (den != AV_NOPTS_VALUE) {
2893 ret = AVERROR_INVALIDDATA;
2896 frac_init(&st->pts, 0, 0, den);
2901 av_dict_free(options);
2910 //FIXME merge with compute_pkt_fields
2911 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2912 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2913 int num, den, frame_size, i;
2915 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2916 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2918 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2919 return AVERROR(EINVAL);*/
2921 /* duration field */
2922 if (pkt->duration == 0) {
2923 compute_frame_duration(&num, &den, st, NULL, pkt);
2925 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2929 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2932 //XXX/FIXME this is a temporary hack until all encoders output pts
2933 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2935 // pkt->pts= st->cur_dts;
2936 pkt->pts= st->pts.val;
2939 //calculate dts from pts
2940 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2941 st->pts_buffer[0]= pkt->pts;
2942 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2943 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2944 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2945 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2947 pkt->dts= st->pts_buffer[0];
2950 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2951 av_log(s, AV_LOG_ERROR,
2952 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2953 st->index, st->cur_dts, pkt->dts);
2954 return AVERROR(EINVAL);
2956 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2957 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2958 return AVERROR(EINVAL);
2961 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2962 st->cur_dts= pkt->dts;
2963 st->pts.val= pkt->dts;
2966 switch (st->codec->codec_type) {
2967 case AVMEDIA_TYPE_AUDIO:
2968 frame_size = get_audio_frame_size(st->codec, pkt->size);
2970 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2971 likely equal to the encoder delay, but it would be better if we
2972 had the real timestamps from the encoder */
2973 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2974 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2977 case AVMEDIA_TYPE_VIDEO:
2978 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2986 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2991 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
2992 return s->oformat->write_packet(s, pkt);
2996 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2998 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3001 ret= s->oformat->write_packet(s, pkt);
3004 s->streams[pkt->stream_index]->nb_frames++;
3008 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3009 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3011 AVPacketList **next_point, *this_pktl;
3013 this_pktl = av_mallocz(sizeof(AVPacketList));
3014 this_pktl->pkt= *pkt;
3015 pkt->destruct= NULL; // do not free original but only the copy
3016 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3018 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3019 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3021 next_point = &s->packet_buffer;
3024 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3025 while(!compare(s, &(*next_point)->pkt, pkt)){
3026 next_point= &(*next_point)->next;
3030 next_point = &(s->packet_buffer_end->next);
3033 assert(!*next_point);
3035 s->packet_buffer_end= this_pktl;
3038 this_pktl->next= *next_point;
3040 s->streams[pkt->stream_index]->last_in_packet_buffer=
3041 *next_point= this_pktl;
3044 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3046 AVStream *st = s->streams[ pkt ->stream_index];
3047 AVStream *st2= s->streams[ next->stream_index];
3048 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3052 return pkt->stream_index < next->stream_index;
3056 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3062 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3065 for(i=0; i < s->nb_streams; i++)
3066 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3068 if(stream_count && (s->nb_streams == stream_count || flush)){
3069 pktl= s->packet_buffer;
3072 s->packet_buffer= pktl->next;
3073 if(!s->packet_buffer)
3074 s->packet_buffer_end= NULL;
3076 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3077 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3081 av_init_packet(out);
3087 * Interleave an AVPacket correctly so it can be muxed.
3088 * @param out the interleaved packet will be output here
3089 * @param in the input packet
3090 * @param flush 1 if no further packets are available as input and all
3091 * remaining packets should be output
3092 * @return 1 if a packet was output, 0 if no packet could be output,
3093 * < 0 if an error occurred
3095 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3096 if (s->oformat->interleave_packet) {
3097 int ret = s->oformat->interleave_packet(s, out, in, flush);
3102 return av_interleave_packet_per_dts(s, out, in, flush);
3105 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3106 AVStream *st= s->streams[ pkt->stream_index];
3109 //FIXME/XXX/HACK drop zero sized packets
3110 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3113 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3114 pkt->size, pkt->dts, pkt->pts);
3115 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3118 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3119 return AVERROR(EINVAL);
3123 int ret= interleave_packet(s, &opkt, pkt, 0);
3124 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3127 ret= s->oformat->write_packet(s, &opkt);
3129 s->streams[opkt.stream_index]->nb_frames++;
3131 av_free_packet(&opkt);
3139 int av_write_trailer(AVFormatContext *s)
3145 ret= interleave_packet(s, &pkt, NULL, 1);
3146 if(ret<0) //FIXME cleanup needed for ret<0 ?
3151 ret= s->oformat->write_packet(s, &pkt);
3153 s->streams[pkt.stream_index]->nb_frames++;
3155 av_free_packet(&pkt);
3161 if(s->oformat->write_trailer)
3162 ret = s->oformat->write_trailer(s);
3164 for(i=0;i<s->nb_streams;i++) {
3165 av_freep(&s->streams[i]->priv_data);
3166 av_freep(&s->streams[i]->index_entries);
3168 if (s->oformat->priv_class)
3169 av_opt_free(s->priv_data);
3170 av_freep(&s->priv_data);
3174 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3177 AVProgram *program=NULL;
3180 if (idx >= ac->nb_streams) {
3181 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3185 for(i=0; i<ac->nb_programs; i++){
3186 if(ac->programs[i]->id != progid)
3188 program = ac->programs[i];
3189 for(j=0; j<program->nb_stream_indexes; j++)
3190 if(program->stream_index[j] == idx)
3193 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3196 program->stream_index = tmp;
3197 program->stream_index[program->nb_stream_indexes++] = idx;
3202 static void print_fps(double d, const char *postfix){
3203 uint64_t v= lrintf(d*100);
3204 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3205 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3206 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3209 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3211 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3212 AVDictionaryEntry *tag=NULL;
3214 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3215 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3216 if(strcmp("language", tag->key))
3217 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3222 /* "user interface" functions */
3223 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3226 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3227 AVStream *st = ic->streams[i];
3228 int g = av_gcd(st->time_base.num, st->time_base.den);
3229 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3230 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3231 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3232 /* the pid is an important information, so we display it */
3233 /* XXX: add a generic system */
3234 if (flags & AVFMT_SHOW_IDS)
3235 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3237 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3238 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3239 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3240 if (st->sample_aspect_ratio.num && // default
3241 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3242 AVRational display_aspect_ratio;
3243 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3244 st->codec->width*st->sample_aspect_ratio.num,
3245 st->codec->height*st->sample_aspect_ratio.den,
3247 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3248 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3249 display_aspect_ratio.num, display_aspect_ratio.den);
3251 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3252 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3253 print_fps(av_q2d(st->avg_frame_rate), "fps");
3254 if(st->r_frame_rate.den && st->r_frame_rate.num)
3255 print_fps(av_q2d(st->r_frame_rate), "tbr");
3256 if(st->time_base.den && st->time_base.num)
3257 print_fps(1/av_q2d(st->time_base), "tbn");
3258 if(st->codec->time_base.den && st->codec->time_base.num)
3259 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3261 if (st->disposition & AV_DISPOSITION_DEFAULT)
3262 av_log(NULL, AV_LOG_INFO, " (default)");
3263 if (st->disposition & AV_DISPOSITION_DUB)
3264 av_log(NULL, AV_LOG_INFO, " (dub)");
3265 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3266 av_log(NULL, AV_LOG_INFO, " (original)");
3267 if (st->disposition & AV_DISPOSITION_COMMENT)
3268 av_log(NULL, AV_LOG_INFO, " (comment)");
3269 if (st->disposition & AV_DISPOSITION_LYRICS)
3270 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3271 if (st->disposition & AV_DISPOSITION_KARAOKE)
3272 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3273 if (st->disposition & AV_DISPOSITION_FORCED)
3274 av_log(NULL, AV_LOG_INFO, " (forced)");
3275 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3276 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3277 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3278 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3279 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3280 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3281 av_log(NULL, AV_LOG_INFO, "\n");
3282 dump_metadata(NULL, st->metadata, " ");
3285 void av_dump_format(AVFormatContext *ic,
3291 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3292 if (ic->nb_streams && !printed)
3295 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3296 is_output ? "Output" : "Input",
3298 is_output ? ic->oformat->name : ic->iformat->name,
3299 is_output ? "to" : "from", url);
3300 dump_metadata(NULL, ic->metadata, " ");
3302 av_log(NULL, AV_LOG_INFO, " Duration: ");
3303 if (ic->duration != AV_NOPTS_VALUE) {
3304 int hours, mins, secs, us;
3305 secs = ic->duration / AV_TIME_BASE;
3306 us = ic->duration % AV_TIME_BASE;
3311 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3312 (100 * us) / AV_TIME_BASE);
3314 av_log(NULL, AV_LOG_INFO, "N/A");
3316 if (ic->start_time != AV_NOPTS_VALUE) {
3318 av_log(NULL, AV_LOG_INFO, ", start: ");
3319 secs = ic->start_time / AV_TIME_BASE;
3320 us = abs(ic->start_time % AV_TIME_BASE);
3321 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3322 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3324 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3326 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3328 av_log(NULL, AV_LOG_INFO, "N/A");
3330 av_log(NULL, AV_LOG_INFO, "\n");
3332 for (i = 0; i < ic->nb_chapters; i++) {
3333 AVChapter *ch = ic->chapters[i];
3334 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3335 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3336 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3338 dump_metadata(NULL, ch->metadata, " ");
3340 if(ic->nb_programs) {
3341 int j, k, total = 0;
3342 for(j=0; j<ic->nb_programs; j++) {
3343 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3345 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3346 name ? name->value : "");
3347 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3348 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3349 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3350 printed[ic->programs[j]->stream_index[k]] = 1;
3352 total += ic->programs[j]->nb_stream_indexes;
3354 if (total < ic->nb_streams)
3355 av_log(NULL, AV_LOG_INFO, " No Program\n");
3357 for(i=0;i<ic->nb_streams;i++)
3359 dump_stream_format(ic, i, index, is_output);
3364 int64_t av_gettime(void)
3367 gettimeofday(&tv,NULL);
3368 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3371 uint64_t ff_ntp_time(void)
3373 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3376 int av_get_frame_filename(char *buf, int buf_size,
3377 const char *path, int number)
3380 char *q, buf1[20], c;
3381 int nd, len, percentd_found;
3393 while (isdigit(*p)) {
3394 nd = nd * 10 + *p++ - '0';
3397 } while (isdigit(c));
3406 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3408 if ((q - buf + len) > buf_size - 1)
3410 memcpy(q, buf1, len);
3418 if ((q - buf) < buf_size - 1)
3422 if (!percentd_found)
3431 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3435 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3437 for(i=0;i<size;i+=16) {
3444 PRINT(" %02x", buf[i+j]);
3449 for(j=0;j<len;j++) {
3451 if (c < ' ' || c > '~')
3460 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3462 hex_dump_internal(NULL, f, 0, buf, size);
3465 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3467 hex_dump_internal(avcl, NULL, level, buf, size);
3470 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3473 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3474 PRINT("stream #%d:\n", pkt->stream_index);
3475 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3476 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3477 /* DTS is _always_ valid after av_read_frame() */
3479 if (pkt->dts == AV_NOPTS_VALUE)
3482 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3483 /* PTS may not be known if B-frames are present. */
3485 if (pkt->pts == AV_NOPTS_VALUE)
3488 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3490 PRINT(" size=%d\n", pkt->size);
3493 av_hex_dump(f, pkt->data, pkt->size);
3496 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3498 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3501 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3504 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3507 void av_url_split(char *proto, int proto_size,
3508 char *authorization, int authorization_size,
3509 char *hostname, int hostname_size,
3511 char *path, int path_size,
3514 const char *p, *ls, *at, *col, *brk;
3516 if (port_ptr) *port_ptr = -1;
3517 if (proto_size > 0) proto[0] = 0;
3518 if (authorization_size > 0) authorization[0] = 0;
3519 if (hostname_size > 0) hostname[0] = 0;
3520 if (path_size > 0) path[0] = 0;
3522 /* parse protocol */
3523 if ((p = strchr(url, ':'))) {
3524 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3529 /* no protocol means plain filename */
3530 av_strlcpy(path, url, path_size);
3534 /* separate path from hostname */
3535 ls = strchr(p, '/');
3537 ls = strchr(p, '?');
3539 av_strlcpy(path, ls, path_size);
3541 ls = &p[strlen(p)]; // XXX
3543 /* the rest is hostname, use that to parse auth/port */
3545 /* authorization (user[:pass]@hostname) */
3546 if ((at = strchr(p, '@')) && at < ls) {
3547 av_strlcpy(authorization, p,
3548 FFMIN(authorization_size, at + 1 - p));
3549 p = at + 1; /* skip '@' */
3552 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3554 av_strlcpy(hostname, p + 1,
3555 FFMIN(hostname_size, brk - p));
3556 if (brk[1] == ':' && port_ptr)
3557 *port_ptr = atoi(brk + 2);
3558 } else if ((col = strchr(p, ':')) && col < ls) {
3559 av_strlcpy(hostname, p,
3560 FFMIN(col + 1 - p, hostname_size));
3561 if (port_ptr) *port_ptr = atoi(col + 1);
3563 av_strlcpy(hostname, p,
3564 FFMIN(ls + 1 - p, hostname_size));
3568 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3571 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3574 'C', 'D', 'E', 'F' };
3575 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3578 'c', 'd', 'e', 'f' };
3579 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3581 for(i = 0; i < s; i++) {
3582 buff[i * 2] = hex_table[src[i] >> 4];
3583 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3589 int ff_hex_to_data(uint8_t *data, const char *p)
3596 p += strspn(p, SPACE_CHARS);
3599 c = toupper((unsigned char) *p++);
3600 if (c >= '0' && c <= '9')
3602 else if (c >= 'A' && c <= 'F')
3617 #if FF_API_SET_PTS_INFO
3618 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3619 unsigned int pts_num, unsigned int pts_den)
3621 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3625 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3626 unsigned int pts_num, unsigned int pts_den)
3629 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3630 if(new_tb.num != pts_num)
3631 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3633 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3635 if(new_tb.num <= 0 || new_tb.den <= 0) {
3636 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3639 s->time_base = new_tb;
3640 s->pts_wrap_bits = pts_wrap_bits;
3643 int ff_url_join(char *str, int size, const char *proto,
3644 const char *authorization, const char *hostname,
3645 int port, const char *fmt, ...)
3648 struct addrinfo hints, *ai;
3653 av_strlcatf(str, size, "%s://", proto);
3654 if (authorization && authorization[0])
3655 av_strlcatf(str, size, "%s@", authorization);
3656 #if CONFIG_NETWORK && defined(AF_INET6)
3657 /* Determine if hostname is a numerical IPv6 address,
3658 * properly escape it within [] in that case. */
3659 memset(&hints, 0, sizeof(hints));
3660 hints.ai_flags = AI_NUMERICHOST;
3661 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3662 if (ai->ai_family == AF_INET6) {
3663 av_strlcat(str, "[", size);
3664 av_strlcat(str, hostname, size);
3665 av_strlcat(str, "]", size);
3667 av_strlcat(str, hostname, size);
3672 /* Not an IPv6 address, just output the plain string. */
3673 av_strlcat(str, hostname, size);
3676 av_strlcatf(str, size, ":%d", port);
3679 int len = strlen(str);
3682 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3688 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3689 AVFormatContext *src)
3694 local_pkt.stream_index = dst_stream;
3695 if (pkt->pts != AV_NOPTS_VALUE)
3696 local_pkt.pts = av_rescale_q(pkt->pts,
3697 src->streams[pkt->stream_index]->time_base,
3698 dst->streams[dst_stream]->time_base);
3699 if (pkt->dts != AV_NOPTS_VALUE)
3700 local_pkt.dts = av_rescale_q(pkt->dts,
3701 src->streams[pkt->stream_index]->time_base,
3702 dst->streams[dst_stream]->time_base);
3703 return av_write_frame(dst, &local_pkt);
3706 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3709 const char *ptr = str;
3711 /* Parse key=value pairs. */
3714 char *dest = NULL, *dest_end;
3715 int key_len, dest_len = 0;
3717 /* Skip whitespace and potential commas. */
3718 while (*ptr && (isspace(*ptr) || *ptr == ','))
3725 if (!(ptr = strchr(key, '=')))
3728 key_len = ptr - key;
3730 callback_get_buf(context, key, key_len, &dest, &dest_len);
3731 dest_end = dest + dest_len - 1;
3735 while (*ptr && *ptr != '\"') {
3739 if (dest && dest < dest_end)
3743 if (dest && dest < dest_end)
3751 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3752 if (dest && dest < dest_end)
3760 int ff_find_stream_index(AVFormatContext *s, int id)
3763 for (i = 0; i < s->nb_streams; i++) {
3764 if (s->streams[i]->id == id)
3770 void ff_make_absolute_url(char *buf, int size, const char *base,
3774 /* Absolute path, relative to the current server */
3775 if (base && strstr(base, "://") && rel[0] == '/') {
3777 av_strlcpy(buf, base, size);
3778 sep = strstr(buf, "://");
3781 sep = strchr(sep, '/');
3785 av_strlcat(buf, rel, size);
3788 /* If rel actually is an absolute url, just copy it */
3789 if (!base || strstr(rel, "://") || rel[0] == '/') {
3790 av_strlcpy(buf, rel, size);
3794 av_strlcpy(buf, base, size);
3795 /* Remove the file name from the base url */
3796 sep = strrchr(buf, '/');
3801 while (av_strstart(rel, "../", NULL) && sep) {
3802 /* Remove the path delimiter at the end */
3804 sep = strrchr(buf, '/');
3805 /* If the next directory name to pop off is "..", break here */
3806 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3807 /* Readd the slash we just removed */
3808 av_strlcat(buf, "/", size);
3811 /* Cut off the directory name */
3818 av_strlcat(buf, rel, size);
3821 int64_t ff_iso8601_to_unix_time(const char *datestr)
3824 struct tm time1 = {0}, time2 = {0};
3826 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3827 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3829 return av_timegm(&time2);
3831 return av_timegm(&time1);
3833 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3834 "the date string.\n");
3839 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3842 if (ofmt->query_codec)
3843 return ofmt->query_codec(codec_id, std_compliance);
3844 else if (ofmt->codec_tag)
3845 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3846 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3847 codec_id == ofmt->subtitle_codec)
3850 return AVERROR_PATCHWELCOME;
3853 int avformat_network_init(void)
3857 ff_network_inited_globally = 1;
3858 if ((ret = ff_network_init()) < 0)
3865 int avformat_network_deinit(void)
3874 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3875 uint64_t channel_layout, int32_t sample_rate,
3876 int32_t width, int32_t height)
3882 return AVERROR(EINVAL);
3885 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3887 if (channel_layout) {
3889 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3893 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3895 if (width || height) {
3897 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3899 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3901 return AVERROR(ENOMEM);
3902 bytestream_put_le32(&data, flags);
3904 bytestream_put_le32(&data, channels);
3906 bytestream_put_le64(&data, channel_layout);
3908 bytestream_put_le32(&data, sample_rate);
3909 if (width || height) {
3910 bytestream_put_le32(&data, width);
3911 bytestream_put_le32(&data, height);