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, s->probesize);
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, s->probesize);
501 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
502 AVPacketList **plast_pktl){
503 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
508 (*plast_pktl)->next = pktl;
510 *packet_buffer = pktl;
512 /* add the packet in the buffered packet list */
518 static void queue_attached_pictures(AVFormatContext *s)
521 for (i = 0; i < s->nb_streams; i++)
522 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
523 s->streams[i]->discard < AVDISCARD_ALL) {
524 AVPacket copy = s->streams[i]->attached_pic;
525 copy.destruct = NULL;
526 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
530 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
532 AVFormatContext *s = *ps;
534 AVDictionary *tmp = NULL;
535 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
537 if (!s && !(s = avformat_alloc_context()))
538 return AVERROR(ENOMEM);
543 av_dict_copy(&tmp, *options, 0);
545 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
548 if ((ret = init_input(s, filename, &tmp)) < 0)
551 /* check filename in case an image number is expected */
552 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
553 if (!av_filename_number_test(filename)) {
554 ret = AVERROR(EINVAL);
559 s->duration = s->start_time = AV_NOPTS_VALUE;
560 av_strlcpy(s->filename, filename, sizeof(s->filename));
562 /* allocate private data */
563 if (s->iformat->priv_data_size > 0) {
564 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
565 ret = AVERROR(ENOMEM);
568 if (s->iformat->priv_class) {
569 *(const AVClass**)s->priv_data = s->iformat->priv_class;
570 av_opt_set_defaults(s->priv_data);
571 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
576 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
578 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
580 if (s->iformat->read_header)
581 if ((ret = s->iformat->read_header(s)) < 0)
584 if (id3v2_extra_meta &&
585 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
587 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
589 queue_attached_pictures(s);
591 if (s->pb && !s->data_offset)
592 s->data_offset = avio_tell(s->pb);
594 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
597 av_dict_free(options);
604 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
606 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
608 avformat_free_context(s);
613 /*******************************************************/
615 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
621 AVPacketList *pktl = s->raw_packet_buffer;
625 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
626 !s->streams[pkt->stream_index]->probe_packets ||
627 s->raw_packet_buffer_remaining_size < pkt->size){
628 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
631 s->raw_packet_buffer = pktl->next;
632 s->raw_packet_buffer_remaining_size += pkt->size;
639 ret= s->iformat->read_packet(s, pkt);
641 if (!pktl || ret == AVERROR(EAGAIN))
643 for (i = 0; i < s->nb_streams; i++)
644 s->streams[i]->probe_packets = 0;
648 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
649 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
650 av_log(s, AV_LOG_WARNING,
651 "Dropped corrupted packet (stream = %d)\n",
657 st= s->streams[pkt->stream_index];
659 switch(st->codec->codec_type){
660 case AVMEDIA_TYPE_VIDEO:
661 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
663 case AVMEDIA_TYPE_AUDIO:
664 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
666 case AVMEDIA_TYPE_SUBTITLE:
667 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
671 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
675 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
676 s->raw_packet_buffer_remaining_size -= pkt->size;
678 if(st->codec->codec_id == CODEC_ID_PROBE){
679 AVProbeData *pd = &st->probe_data;
680 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
683 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
684 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
685 pd->buf_size += pkt->size;
686 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
688 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
689 //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
690 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
691 if(st->codec->codec_id != CODEC_ID_PROBE){
694 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
701 #if FF_API_READ_PACKET
702 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
704 return ff_read_packet(s, pkt);
709 /**********************************************************/
712 * Get the number of samples of an audio frame. Return -1 on error.
714 static int get_audio_frame_size(AVCodecContext *enc, int size, int mux)
718 /* give frame_size priority if demuxing */
719 if (!mux && enc->frame_size > 1)
720 return enc->frame_size;
722 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
725 /* fallback to using frame_size if muxing */
726 if (enc->frame_size > 1)
727 return enc->frame_size;
734 * Return the frame duration in seconds. Return 0 if not available.
736 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
737 AVCodecParserContext *pc, AVPacket *pkt)
743 switch(st->codec->codec_type) {
744 case AVMEDIA_TYPE_VIDEO:
745 if (st->r_frame_rate.num) {
746 *pnum = st->r_frame_rate.den;
747 *pden = st->r_frame_rate.num;
748 } else if(st->time_base.num*1000LL > st->time_base.den) {
749 *pnum = st->time_base.num;
750 *pden = st->time_base.den;
751 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
752 *pnum = st->codec->time_base.num;
753 *pden = st->codec->time_base.den;
754 if (pc && pc->repeat_pict) {
755 *pnum = (*pnum) * (1 + pc->repeat_pict);
757 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
758 //Thus if we have no parser in such case leave duration undefined.
759 if(st->codec->ticks_per_frame>1 && !pc){
764 case AVMEDIA_TYPE_AUDIO:
765 frame_size = get_audio_frame_size(st->codec, pkt->size, 0);
766 if (frame_size <= 0 || st->codec->sample_rate <= 0)
769 *pden = st->codec->sample_rate;
776 static int is_intra_only(AVCodecContext *enc){
777 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
779 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
780 switch(enc->codec_id){
782 case CODEC_ID_MJPEGB:
784 case CODEC_ID_PRORES:
785 case CODEC_ID_RAWVIDEO:
786 case CODEC_ID_DVVIDEO:
787 case CODEC_ID_HUFFYUV:
788 case CODEC_ID_FFVHUFF:
793 case CODEC_ID_JPEG2000:
801 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
802 int64_t dts, int64_t pts)
804 AVStream *st= s->streams[stream_index];
805 AVPacketList *pktl= s->packet_buffer;
807 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
810 st->first_dts= dts - st->cur_dts;
813 for(; pktl; pktl= pktl->next){
814 if(pktl->pkt.stream_index != stream_index)
816 //FIXME think more about this check
817 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
818 pktl->pkt.pts += st->first_dts;
820 if(pktl->pkt.dts != AV_NOPTS_VALUE)
821 pktl->pkt.dts += st->first_dts;
823 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
824 st->start_time= pktl->pkt.pts;
826 if (st->start_time == AV_NOPTS_VALUE)
827 st->start_time = pts;
830 static void update_initial_durations(AVFormatContext *s, AVStream *st,
831 int stream_index, int duration)
833 AVPacketList *pktl= s->packet_buffer;
836 if(st->first_dts != AV_NOPTS_VALUE){
837 cur_dts= st->first_dts;
838 for(; pktl; pktl= pktl->next){
839 if(pktl->pkt.stream_index == stream_index){
840 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
845 pktl= s->packet_buffer;
846 st->first_dts = cur_dts;
847 }else if(st->cur_dts)
850 for(; pktl; pktl= pktl->next){
851 if(pktl->pkt.stream_index != stream_index)
853 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
854 && !pktl->pkt.duration){
855 pktl->pkt.dts= cur_dts;
856 if(!st->codec->has_b_frames)
857 pktl->pkt.pts= cur_dts;
859 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
860 pktl->pkt.duration = duration;
864 if(st->first_dts == AV_NOPTS_VALUE)
865 st->cur_dts= cur_dts;
868 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
869 AVCodecParserContext *pc, AVPacket *pkt)
871 int num, den, presentation_delayed, delay, i;
874 if (s->flags & AVFMT_FLAG_NOFILLIN)
877 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
878 pkt->dts= AV_NOPTS_VALUE;
880 /* do we have a video B-frame ? */
881 delay= st->codec->has_b_frames;
882 presentation_delayed = 0;
884 /* XXX: need has_b_frame, but cannot get it if the codec is
887 pc && pc->pict_type != AV_PICTURE_TYPE_B)
888 presentation_delayed = 1;
890 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
891 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
892 pkt->dts -= 1LL<<st->pts_wrap_bits;
895 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
896 // we take the conservative approach and discard both
897 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
898 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
899 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
900 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
903 if (pkt->duration == 0 && st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
904 compute_frame_duration(&num, &den, st, pc, pkt);
906 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
908 if(pkt->duration != 0 && s->packet_buffer)
909 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
913 /* correct timestamps with byte offset if demuxers only have timestamps
914 on packet boundaries */
915 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
916 /* this will estimate bitrate based on this frame's duration and size */
917 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
918 if(pkt->pts != AV_NOPTS_VALUE)
920 if(pkt->dts != AV_NOPTS_VALUE)
924 if (pc && pc->dts_sync_point >= 0) {
925 // we have synchronization info from the parser
926 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
928 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
929 if (pkt->dts != AV_NOPTS_VALUE) {
930 // got DTS from the stream, update reference timestamp
931 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
932 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
933 } else if (st->reference_dts != AV_NOPTS_VALUE) {
934 // compute DTS based on reference timestamp
935 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
936 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
938 if (pc->dts_sync_point > 0)
939 st->reference_dts = pkt->dts; // new reference
943 /* This may be redundant, but it should not hurt. */
944 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
945 presentation_delayed = 1;
947 // 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);
948 /* interpolate PTS and DTS if they are not present */
949 //We skip H264 currently because delay and has_b_frames are not reliably set
950 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
951 if (presentation_delayed) {
952 /* DTS = decompression timestamp */
953 /* PTS = presentation timestamp */
954 if (pkt->dts == AV_NOPTS_VALUE)
955 pkt->dts = st->last_IP_pts;
956 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
957 if (pkt->dts == AV_NOPTS_VALUE)
958 pkt->dts = st->cur_dts;
960 /* this is tricky: the dts must be incremented by the duration
961 of the frame we are displaying, i.e. the last I- or P-frame */
962 if (st->last_IP_duration == 0)
963 st->last_IP_duration = pkt->duration;
964 if(pkt->dts != AV_NOPTS_VALUE)
965 st->cur_dts = pkt->dts + st->last_IP_duration;
966 st->last_IP_duration = pkt->duration;
967 st->last_IP_pts= pkt->pts;
968 /* cannot compute PTS if not present (we can compute it only
969 by knowing the future */
970 } else if (pkt->pts != AV_NOPTS_VALUE ||
971 pkt->dts != AV_NOPTS_VALUE ||
973 st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
974 int duration = pkt->duration;
975 if (!duration && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
976 compute_frame_duration(&num, &den, st, pc, pkt);
978 duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den,
979 den * (int64_t)st->time_base.num,
981 if (duration != 0 && s->packet_buffer) {
982 update_initial_durations(s, st, pkt->stream_index,
988 if (pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE ||
990 /* presentation is not delayed : PTS and DTS are the same */
991 if (pkt->pts == AV_NOPTS_VALUE)
993 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
995 if (pkt->pts == AV_NOPTS_VALUE)
996 pkt->pts = st->cur_dts;
998 if (pkt->pts != AV_NOPTS_VALUE)
999 st->cur_dts = pkt->pts + duration;
1004 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1005 st->pts_buffer[0]= pkt->pts;
1006 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1007 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1008 if(pkt->dts == AV_NOPTS_VALUE)
1009 pkt->dts= st->pts_buffer[0];
1010 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1011 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1013 if(pkt->dts > st->cur_dts)
1014 st->cur_dts = pkt->dts;
1017 // 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);
1020 if(is_intra_only(st->codec))
1021 pkt->flags |= AV_PKT_FLAG_KEY;
1023 pkt->convergence_duration = pc->convergence_duration;
1026 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1029 AVPacketList *pktl = *pkt_buf;
1030 *pkt_buf = pktl->next;
1031 av_free_packet(&pktl->pkt);
1034 *pkt_buf_end = NULL;
1038 * Parse a packet, add all split parts to parse_queue
1040 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1042 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1044 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1045 AVStream *st = s->streams[stream_index];
1046 uint8_t *data = pkt ? pkt->data : NULL;
1047 int size = pkt ? pkt->size : 0;
1048 int ret = 0, got_output = 0;
1051 av_init_packet(&flush_pkt);
1056 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1059 av_init_packet(&out_pkt);
1060 len = av_parser_parse2(st->parser, st->codec,
1061 &out_pkt.data, &out_pkt.size, data, size,
1062 pkt->pts, pkt->dts, pkt->pos);
1064 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1065 /* increment read pointer */
1069 got_output = !!out_pkt.size;
1074 /* set the duration */
1075 out_pkt.duration = 0;
1076 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1077 if (st->codec->sample_rate > 0) {
1078 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1079 (AVRational){ 1, st->codec->sample_rate },
1083 } else if (st->codec->time_base.num != 0 &&
1084 st->codec->time_base.den != 0) {
1085 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1086 st->codec->time_base,
1091 out_pkt.stream_index = st->index;
1092 out_pkt.pts = st->parser->pts;
1093 out_pkt.dts = st->parser->dts;
1094 out_pkt.pos = st->parser->pos;
1096 if (st->parser->key_frame == 1 ||
1097 (st->parser->key_frame == -1 &&
1098 st->parser->pict_type == AV_PICTURE_TYPE_I))
1099 out_pkt.flags |= AV_PKT_FLAG_KEY;
1101 compute_pkt_fields(s, st, st->parser, &out_pkt);
1103 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1104 out_pkt.flags & AV_PKT_FLAG_KEY) {
1105 ff_reduce_index(s, st->index);
1106 av_add_index_entry(st, st->parser->frame_offset, out_pkt.dts,
1107 0, 0, AVINDEX_KEYFRAME);
1110 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1111 out_pkt.destruct = pkt->destruct;
1112 pkt->destruct = NULL;
1114 if ((ret = av_dup_packet(&out_pkt)) < 0)
1117 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1118 av_free_packet(&out_pkt);
1119 ret = AVERROR(ENOMEM);
1125 /* end of the stream => close and free the parser */
1126 if (pkt == &flush_pkt) {
1127 av_parser_close(st->parser);
1132 av_free_packet(pkt);
1136 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1137 AVPacketList **pkt_buffer_end,
1141 av_assert0(*pkt_buffer);
1144 *pkt_buffer = pktl->next;
1146 *pkt_buffer_end = NULL;
1151 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1153 int ret = 0, i, got_packet = 0;
1155 av_init_packet(pkt);
1157 while (!got_packet && !s->parse_queue) {
1161 /* read next packet */
1162 ret = ff_read_packet(s, &cur_pkt);
1164 if (ret == AVERROR(EAGAIN))
1166 /* flush the parsers */
1167 for(i = 0; i < s->nb_streams; i++) {
1169 if (st->parser && st->need_parsing)
1170 parse_packet(s, NULL, st->index);
1172 /* all remaining packets are now in parse_queue =>
1173 * really terminate parsing */
1177 st = s->streams[cur_pkt.stream_index];
1179 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1180 cur_pkt.dts != AV_NOPTS_VALUE &&
1181 cur_pkt.pts < cur_pkt.dts) {
1182 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1183 cur_pkt.stream_index,
1188 if (s->debug & FF_FDEBUG_TS)
1189 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1190 cur_pkt.stream_index,
1197 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1198 st->parser = av_parser_init(st->codec->codec_id);
1200 /* no parser available: just output the raw packets */
1201 st->need_parsing = AVSTREAM_PARSE_NONE;
1202 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1203 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1204 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1205 st->parser->flags |= PARSER_FLAG_ONCE;
1209 if (!st->need_parsing || !st->parser) {
1210 /* no parsing needed: we just output the packet as is */
1212 compute_pkt_fields(s, st, NULL, pkt);
1213 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1214 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1215 ff_reduce_index(s, st->index);
1216 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1219 } else if (st->discard < AVDISCARD_ALL) {
1220 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1224 av_free_packet(&cur_pkt);
1228 if (!got_packet && s->parse_queue)
1229 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1231 if(s->debug & FF_FDEBUG_TS)
1232 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1243 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1245 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1249 return s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1250 &s->packet_buffer_end,
1252 read_frame_internal(s, pkt);
1256 AVPacketList *pktl = s->packet_buffer;
1259 AVPacket *next_pkt = &pktl->pkt;
1261 if (next_pkt->dts != AV_NOPTS_VALUE) {
1262 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1263 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1264 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1265 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1266 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1267 next_pkt->pts = pktl->pkt.dts;
1271 pktl = s->packet_buffer;
1274 /* read packet from packet buffer, if there is data */
1275 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1276 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1277 return read_from_packet_buffer(&s->packet_buffer,
1278 &s->packet_buffer_end, pkt);
1281 ret = read_frame_internal(s, pkt);
1283 if (pktl && ret != AVERROR(EAGAIN)) {
1290 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1291 &s->packet_buffer_end)) < 0)
1292 return AVERROR(ENOMEM);
1296 /* XXX: suppress the packet queue */
1297 static void flush_packet_queue(AVFormatContext *s)
1299 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1300 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1301 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1303 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1306 /*******************************************************/
1309 int av_find_default_stream_index(AVFormatContext *s)
1311 int first_audio_index = -1;
1315 if (s->nb_streams <= 0)
1317 for(i = 0; i < s->nb_streams; i++) {
1319 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1320 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1323 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1324 first_audio_index = i;
1326 return first_audio_index >= 0 ? first_audio_index : 0;
1330 * Flush the frame reader.
1332 void ff_read_frame_flush(AVFormatContext *s)
1337 flush_packet_queue(s);
1339 /* for each stream, reset read state */
1340 for(i = 0; i < s->nb_streams; i++) {
1344 av_parser_close(st->parser);
1347 st->last_IP_pts = AV_NOPTS_VALUE;
1348 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1349 st->reference_dts = AV_NOPTS_VALUE;
1351 st->probe_packets = MAX_PROBE_PACKETS;
1353 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1354 st->pts_buffer[j]= AV_NOPTS_VALUE;
1358 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1362 for(i = 0; i < s->nb_streams; i++) {
1363 AVStream *st = s->streams[i];
1365 st->cur_dts = av_rescale(timestamp,
1366 st->time_base.den * (int64_t)ref_st->time_base.num,
1367 st->time_base.num * (int64_t)ref_st->time_base.den);
1371 void ff_reduce_index(AVFormatContext *s, int stream_index)
1373 AVStream *st= s->streams[stream_index];
1374 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1376 if((unsigned)st->nb_index_entries >= max_entries){
1378 for(i=0; 2*i<st->nb_index_entries; i++)
1379 st->index_entries[i]= st->index_entries[2*i];
1380 st->nb_index_entries= i;
1384 int ff_add_index_entry(AVIndexEntry **index_entries,
1385 int *nb_index_entries,
1386 unsigned int *index_entries_allocated_size,
1387 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1389 AVIndexEntry *entries, *ie;
1392 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1395 entries = av_fast_realloc(*index_entries,
1396 index_entries_allocated_size,
1397 (*nb_index_entries + 1) *
1398 sizeof(AVIndexEntry));
1402 *index_entries= entries;
1404 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1407 index= (*nb_index_entries)++;
1408 ie= &entries[index];
1409 assert(index==0 || ie[-1].timestamp < timestamp);
1411 ie= &entries[index];
1412 if(ie->timestamp != timestamp){
1413 if(ie->timestamp <= timestamp)
1415 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1416 (*nb_index_entries)++;
1417 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1418 distance= ie->min_distance;
1422 ie->timestamp = timestamp;
1423 ie->min_distance= distance;
1430 int av_add_index_entry(AVStream *st,
1431 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1433 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1434 &st->index_entries_allocated_size, pos,
1435 timestamp, size, distance, flags);
1438 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1439 int64_t wanted_timestamp, int flags)
1447 //optimize appending index entries at the end
1448 if(b && entries[b-1].timestamp < wanted_timestamp)
1453 timestamp = entries[m].timestamp;
1454 if(timestamp >= wanted_timestamp)
1456 if(timestamp <= wanted_timestamp)
1459 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1461 if(!(flags & AVSEEK_FLAG_ANY)){
1462 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1463 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1472 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1475 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1476 wanted_timestamp, flags);
1479 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1481 AVInputFormat *avif= s->iformat;
1482 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1483 int64_t ts_min, ts_max, ts;
1488 if (stream_index < 0)
1491 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1494 ts_min= AV_NOPTS_VALUE;
1495 pos_limit= -1; //gcc falsely says it may be uninitialized
1497 st= s->streams[stream_index];
1498 if(st->index_entries){
1501 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()
1502 index= FFMAX(index, 0);
1503 e= &st->index_entries[index];
1505 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1507 ts_min= e->timestamp;
1508 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1514 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1515 assert(index < st->nb_index_entries);
1517 e= &st->index_entries[index];
1518 assert(e->timestamp >= target_ts);
1520 ts_max= e->timestamp;
1521 pos_limit= pos_max - e->min_distance;
1522 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1523 pos_max,pos_limit, ts_max);
1527 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1532 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1535 ff_update_cur_dts(s, st, ts);
1540 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1541 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1542 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1543 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1546 int64_t start_pos, filesize;
1549 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1551 if(ts_min == AV_NOPTS_VALUE){
1552 pos_min = s->data_offset;
1553 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1554 if (ts_min == AV_NOPTS_VALUE)
1558 if(ts_max == AV_NOPTS_VALUE){
1560 filesize = avio_size(s->pb);
1561 pos_max = filesize - 1;
1564 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1566 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1567 if (ts_max == AV_NOPTS_VALUE)
1571 int64_t tmp_pos= pos_max + 1;
1572 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1573 if(tmp_ts == AV_NOPTS_VALUE)
1577 if(tmp_pos >= filesize)
1583 if(ts_min > ts_max){
1585 }else if(ts_min == ts_max){
1590 while (pos_min < pos_limit) {
1591 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1592 pos_min, pos_max, ts_min, ts_max);
1593 assert(pos_limit <= pos_max);
1596 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1597 // interpolate position (better than dichotomy)
1598 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1599 + pos_min - approximate_keyframe_distance;
1600 }else if(no_change==1){
1601 // bisection, if interpolation failed to change min or max pos last time
1602 pos = (pos_min + pos_limit)>>1;
1604 /* linear search if bisection failed, can only happen if there
1605 are very few or no keyframes between min/max */
1610 else if(pos > pos_limit)
1614 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1619 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1620 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1621 pos_limit, start_pos, no_change);
1622 if(ts == AV_NOPTS_VALUE){
1623 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1626 assert(ts != AV_NOPTS_VALUE);
1627 if (target_ts <= ts) {
1628 pos_limit = start_pos - 1;
1632 if (target_ts >= ts) {
1638 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1639 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1641 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1643 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1644 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1645 pos, ts_min, target_ts, ts_max);
1650 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1651 int64_t pos_min, pos_max;
1653 pos_min = s->data_offset;
1654 pos_max = avio_size(s->pb) - 1;
1656 if (pos < pos_min) pos= pos_min;
1657 else if(pos > pos_max) pos= pos_max;
1659 avio_seek(s->pb, pos, SEEK_SET);
1664 static int seek_frame_generic(AVFormatContext *s,
1665 int stream_index, int64_t timestamp, int flags)
1672 st = s->streams[stream_index];
1674 index = av_index_search_timestamp(st, timestamp, flags);
1676 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1679 if(index < 0 || index==st->nb_index_entries-1){
1682 if(st->nb_index_entries){
1683 assert(st->index_entries);
1684 ie= &st->index_entries[st->nb_index_entries-1];
1685 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1687 ff_update_cur_dts(s, st, ie->timestamp);
1689 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1695 read_status = av_read_frame(s, &pkt);
1696 } while (read_status == AVERROR(EAGAIN));
1697 if (read_status < 0)
1699 av_free_packet(&pkt);
1700 if(stream_index == pkt.stream_index){
1701 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1705 index = av_index_search_timestamp(st, timestamp, flags);
1710 ff_read_frame_flush(s);
1711 if (s->iformat->read_seek){
1712 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1715 ie = &st->index_entries[index];
1716 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1718 ff_update_cur_dts(s, st, ie->timestamp);
1723 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1724 int64_t timestamp, int flags)
1729 if (flags & AVSEEK_FLAG_BYTE) {
1730 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1732 ff_read_frame_flush(s);
1733 return seek_frame_byte(s, stream_index, timestamp, flags);
1736 if(stream_index < 0){
1737 stream_index= av_find_default_stream_index(s);
1738 if(stream_index < 0)
1741 st= s->streams[stream_index];
1742 /* timestamp for default must be expressed in AV_TIME_BASE units */
1743 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1746 /* first, we try the format specific seek */
1747 if (s->iformat->read_seek) {
1748 ff_read_frame_flush(s);
1749 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1756 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1757 ff_read_frame_flush(s);
1758 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1759 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1760 ff_read_frame_flush(s);
1761 return seek_frame_generic(s, stream_index, timestamp, flags);
1767 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1769 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1772 queue_attached_pictures(s);
1777 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1779 if(min_ts > ts || max_ts < ts)
1782 if (s->iformat->read_seek2) {
1784 ff_read_frame_flush(s);
1785 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1788 queue_attached_pictures(s);
1792 if(s->iformat->read_timestamp){
1793 //try to seek via read_timestamp()
1796 //Fallback to old API if new is not implemented but old is
1797 //Note the old has somewat different sematics
1798 if(s->iformat->read_seek || 1)
1799 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1801 // try some generic seek like seek_frame_generic() but with new ts semantics
1804 /*******************************************************/
1807 * Return TRUE if the stream has accurate duration in any stream.
1809 * @return TRUE if the stream has accurate duration for at least one component.
1811 static int has_duration(AVFormatContext *ic)
1816 for(i = 0;i < ic->nb_streams; i++) {
1817 st = ic->streams[i];
1818 if (st->duration != AV_NOPTS_VALUE)
1821 if (ic->duration != AV_NOPTS_VALUE)
1827 * Estimate the stream timings from the one of each components.
1829 * Also computes the global bitrate if possible.
1831 static void update_stream_timings(AVFormatContext *ic)
1833 int64_t start_time, start_time1, end_time, end_time1;
1834 int64_t duration, duration1, filesize;
1838 start_time = INT64_MAX;
1839 end_time = INT64_MIN;
1840 duration = INT64_MIN;
1841 for(i = 0;i < ic->nb_streams; i++) {
1842 st = ic->streams[i];
1843 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1844 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1845 start_time = FFMIN(start_time, start_time1);
1846 if (st->duration != AV_NOPTS_VALUE) {
1847 end_time1 = start_time1
1848 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1849 end_time = FFMAX(end_time, end_time1);
1852 if (st->duration != AV_NOPTS_VALUE) {
1853 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1854 duration = FFMAX(duration, duration1);
1857 if (start_time != INT64_MAX) {
1858 ic->start_time = start_time;
1859 if (end_time != INT64_MIN)
1860 duration = FFMAX(duration, end_time - start_time);
1862 if (duration != INT64_MIN) {
1863 ic->duration = duration;
1864 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1865 /* compute the bitrate */
1866 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1867 (double)ic->duration;
1872 static void fill_all_stream_timings(AVFormatContext *ic)
1877 update_stream_timings(ic);
1878 for(i = 0;i < ic->nb_streams; i++) {
1879 st = ic->streams[i];
1880 if (st->start_time == AV_NOPTS_VALUE) {
1881 if(ic->start_time != AV_NOPTS_VALUE)
1882 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1883 if(ic->duration != AV_NOPTS_VALUE)
1884 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1889 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1891 int64_t filesize, duration;
1895 /* if bit_rate is already set, we believe it */
1896 if (ic->bit_rate <= 0) {
1898 for(i=0;i<ic->nb_streams;i++) {
1899 st = ic->streams[i];
1900 if (st->codec->bit_rate > 0)
1901 bit_rate += st->codec->bit_rate;
1903 ic->bit_rate = bit_rate;
1906 /* if duration is already set, we believe it */
1907 if (ic->duration == AV_NOPTS_VALUE &&
1908 ic->bit_rate != 0) {
1909 filesize = ic->pb ? avio_size(ic->pb) : 0;
1911 for(i = 0; i < ic->nb_streams; i++) {
1912 st = ic->streams[i];
1913 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1914 if (st->duration == AV_NOPTS_VALUE)
1915 st->duration = duration;
1921 #define DURATION_MAX_READ_SIZE 250000
1922 #define DURATION_MAX_RETRY 3
1924 /* only usable for MPEG-PS streams */
1925 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1927 AVPacket pkt1, *pkt = &pkt1;
1929 int read_size, i, ret;
1931 int64_t filesize, offset, duration;
1934 /* flush packet queue */
1935 flush_packet_queue(ic);
1937 for (i=0; i<ic->nb_streams; i++) {
1938 st = ic->streams[i];
1939 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1940 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1943 av_parser_close(st->parser);
1948 /* estimate the end time (duration) */
1949 /* XXX: may need to support wrapping */
1950 filesize = ic->pb ? avio_size(ic->pb) : 0;
1951 end_time = AV_NOPTS_VALUE;
1953 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1957 avio_seek(ic->pb, offset, SEEK_SET);
1960 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1964 ret = ff_read_packet(ic, pkt);
1965 } while(ret == AVERROR(EAGAIN));
1968 read_size += pkt->size;
1969 st = ic->streams[pkt->stream_index];
1970 if (pkt->pts != AV_NOPTS_VALUE &&
1971 (st->start_time != AV_NOPTS_VALUE ||
1972 st->first_dts != AV_NOPTS_VALUE)) {
1973 duration = end_time = pkt->pts;
1974 if (st->start_time != AV_NOPTS_VALUE)
1975 duration -= st->start_time;
1977 duration -= st->first_dts;
1979 duration += 1LL<<st->pts_wrap_bits;
1981 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1982 st->duration = duration;
1985 av_free_packet(pkt);
1987 }while( end_time==AV_NOPTS_VALUE
1988 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1989 && ++retry <= DURATION_MAX_RETRY);
1991 fill_all_stream_timings(ic);
1993 avio_seek(ic->pb, old_offset, SEEK_SET);
1994 for (i=0; i<ic->nb_streams; i++) {
1996 st->cur_dts= st->first_dts;
1997 st->last_IP_pts = AV_NOPTS_VALUE;
1998 st->reference_dts = AV_NOPTS_VALUE;
2002 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2006 /* get the file size, if possible */
2007 if (ic->iformat->flags & AVFMT_NOFILE) {
2010 file_size = avio_size(ic->pb);
2011 file_size = FFMAX(0, file_size);
2014 if ((!strcmp(ic->iformat->name, "mpeg") ||
2015 !strcmp(ic->iformat->name, "mpegts")) &&
2016 file_size && ic->pb->seekable) {
2017 /* get accurate estimate from the PTSes */
2018 estimate_timings_from_pts(ic, old_offset);
2019 } else if (has_duration(ic)) {
2020 /* at least one component has timings - we use them for all
2022 fill_all_stream_timings(ic);
2024 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2025 /* less precise: use bitrate info */
2026 estimate_timings_from_bit_rate(ic);
2028 update_stream_timings(ic);
2032 AVStream av_unused *st;
2033 for(i = 0;i < ic->nb_streams; i++) {
2034 st = ic->streams[i];
2035 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2036 (double) st->start_time / AV_TIME_BASE,
2037 (double) st->duration / AV_TIME_BASE);
2039 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2040 (double) ic->start_time / AV_TIME_BASE,
2041 (double) ic->duration / AV_TIME_BASE,
2042 ic->bit_rate / 1000);
2046 static int has_codec_parameters(AVStream *st)
2048 AVCodecContext *avctx = st->codec;
2050 switch (avctx->codec_type) {
2051 case AVMEDIA_TYPE_AUDIO:
2052 val = avctx->sample_rate && avctx->channels;
2053 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2056 case AVMEDIA_TYPE_VIDEO:
2058 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2065 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2068 static int has_decode_delay_been_guessed(AVStream *st)
2070 return st->codec->codec_id != CODEC_ID_H264 ||
2071 st->info->nb_decoded_frames >= 6;
2074 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2075 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2078 int got_picture = 1, ret = 0;
2080 AVPacket pkt = *avpkt;
2082 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2083 AVDictionary *thread_opt = NULL;
2085 codec = st->codec->codec ? st->codec->codec :
2086 avcodec_find_decoder(st->codec->codec_id);
2089 st->info->found_decoder = -1;
2093 /* force thread count to 1 since the h264 decoder will not extract SPS
2094 * and PPS to extradata during multi-threaded decoding */
2095 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2096 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2098 av_dict_free(&thread_opt);
2100 st->info->found_decoder = -1;
2103 st->info->found_decoder = 1;
2104 } else if (!st->info->found_decoder)
2105 st->info->found_decoder = 1;
2107 if (st->info->found_decoder < 0)
2110 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2112 (!has_codec_parameters(st) ||
2113 !has_decode_delay_been_guessed(st) ||
2114 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2116 avcodec_get_frame_defaults(&picture);
2117 switch(st->codec->codec_type) {
2118 case AVMEDIA_TYPE_VIDEO:
2119 ret = avcodec_decode_video2(st->codec, &picture,
2120 &got_picture, &pkt);
2122 case AVMEDIA_TYPE_AUDIO:
2123 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2130 st->info->nb_decoded_frames++;
2139 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2141 while (tags->id != CODEC_ID_NONE) {
2149 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2152 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2153 if(tag == tags[i].tag)
2156 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2157 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2160 return CODEC_ID_NONE;
2163 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2166 for(i=0; tags && tags[i]; i++){
2167 int tag= ff_codec_get_tag(tags[i], id);
2173 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2176 for(i=0; tags && tags[i]; i++){
2177 enum CodecID id= ff_codec_get_id(tags[i], tag);
2178 if(id!=CODEC_ID_NONE) return id;
2180 return CODEC_ID_NONE;
2183 static void compute_chapters_end(AVFormatContext *s)
2186 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2188 for (i = 0; i < s->nb_chapters; i++)
2189 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2190 AVChapter *ch = s->chapters[i];
2191 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2194 for (j = 0; j < s->nb_chapters; j++) {
2195 AVChapter *ch1 = s->chapters[j];
2196 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2197 if (j != i && next_start > ch->start && next_start < end)
2200 ch->end = (end == INT64_MAX) ? ch->start : end;
2204 static int get_std_framerate(int i){
2205 if(i<60*12) return i*1001;
2206 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2210 * Is the time base unreliable.
2211 * This is a heuristic to balance between quick acceptance of the values in
2212 * the headers vs. some extra checks.
2213 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2214 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2215 * And there are "variable" fps files this needs to detect as well.
2217 static int tb_unreliable(AVCodecContext *c){
2218 if( c->time_base.den >= 101L*c->time_base.num
2219 || c->time_base.den < 5L*c->time_base.num
2220 /* || c->codec_tag == AV_RL32("DIVX")
2221 || c->codec_tag == AV_RL32("XVID")*/
2222 || c->codec_id == CODEC_ID_MPEG2VIDEO
2223 || c->codec_id == CODEC_ID_H264
2229 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2231 int i, count, ret, read_size, j;
2233 AVPacket pkt1, *pkt;
2234 int64_t old_offset = avio_tell(ic->pb);
2235 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2237 for(i=0;i<ic->nb_streams;i++) {
2239 AVDictionary *thread_opt = NULL;
2240 st = ic->streams[i];
2242 //only for the split stuff
2243 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2244 st->parser = av_parser_init(st->codec->codec_id);
2245 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2246 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2249 codec = st->codec->codec ? st->codec->codec :
2250 avcodec_find_decoder(st->codec->codec_id);
2252 /* force thread count to 1 since the h264 decoder will not extract SPS
2253 * and PPS to extradata during multi-threaded decoding */
2254 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2256 /* Ensure that subtitle_header is properly set. */
2257 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2258 && codec && !st->codec->codec)
2259 avcodec_open2(st->codec, codec, options ? &options[i]
2262 //try to just open decoders, in case this is enough to get parameters
2263 if (!has_codec_parameters(st)) {
2264 if (codec && !st->codec->codec)
2265 avcodec_open2(st->codec, codec, options ? &options[i]
2269 av_dict_free(&thread_opt);
2272 for (i=0; i<ic->nb_streams; i++) {
2273 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2279 if (ff_check_interrupt(&ic->interrupt_callback)){
2281 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2285 /* check if one codec still needs to be handled */
2286 for(i=0;i<ic->nb_streams;i++) {
2287 int fps_analyze_framecount = 20;
2289 st = ic->streams[i];
2290 if (!has_codec_parameters(st))
2292 /* if the timebase is coarse (like the usual millisecond precision
2293 of mkv), we need to analyze more frames to reliably arrive at
2295 if (av_q2d(st->time_base) > 0.0005)
2296 fps_analyze_framecount *= 2;
2297 if (ic->fps_probe_size >= 0)
2298 fps_analyze_framecount = ic->fps_probe_size;
2299 /* variable fps and no guess at the real fps */
2300 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2301 && st->info->duration_count < fps_analyze_framecount
2302 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2304 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2306 if (st->first_dts == AV_NOPTS_VALUE &&
2307 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2308 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2311 if (i == ic->nb_streams) {
2312 /* NOTE: if the format has no header, then we need to read
2313 some packets to get most of the streams, so we cannot
2315 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2316 /* if we found the info for all the codecs, we can stop */
2318 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2322 /* we did not get all the codec info, but we read too much data */
2323 if (read_size >= ic->probesize) {
2325 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2329 /* NOTE: a new stream can be added there if no header in file
2330 (AVFMTCTX_NOHEADER) */
2331 ret = read_frame_internal(ic, &pkt1);
2332 if (ret == AVERROR(EAGAIN))
2337 AVPacket empty_pkt = { 0 };
2339 av_init_packet(&empty_pkt);
2341 ret = -1; /* we could not have all the codec parameters before EOF */
2342 for(i=0;i<ic->nb_streams;i++) {
2343 st = ic->streams[i];
2345 /* flush the decoders */
2346 if (st->info->found_decoder == 1) {
2348 err = try_decode_frame(st, &empty_pkt,
2349 (options && i < orig_nb_streams) ?
2350 &options[i] : NULL);
2351 } while (err > 0 && !has_codec_parameters(st));
2355 av_log(ic, AV_LOG_WARNING,
2356 "decoding for stream %d failed\n", st->index);
2357 } else if (!has_codec_parameters(st)) {
2359 avcodec_string(buf, sizeof(buf), st->codec, 0);
2360 av_log(ic, AV_LOG_WARNING,
2361 "Could not find codec parameters (%s)\n", buf);
2369 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2370 if ((ret = av_dup_packet(pkt)) < 0)
2371 goto find_stream_info_err;
2373 read_size += pkt->size;
2375 st = ic->streams[pkt->stream_index];
2376 if (st->codec_info_nb_frames>1) {
2377 if (av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2378 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2381 st->info->codec_info_duration += pkt->duration;
2384 int64_t last = st->info->last_dts;
2386 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2387 int64_t duration= pkt->dts - last;
2388 double dur= duration * av_q2d(st->time_base);
2390 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2391 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2392 if (st->info->duration_count < 2)
2393 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2394 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2395 int framerate= get_std_framerate(i);
2396 int ticks= lrintf(dur*framerate/(1001*12));
2397 double error = dur - (double)ticks*1001*12 / framerate;
2398 st->info->duration_error[i] += error*error;
2400 st->info->duration_count++;
2401 // ignore the first 4 values, they might have some random jitter
2402 if (st->info->duration_count > 3)
2403 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2405 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2406 st->info->last_dts = pkt->dts;
2408 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2409 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2410 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2411 st->codec->extradata_size= i;
2412 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2413 if (!st->codec->extradata)
2414 return AVERROR(ENOMEM);
2415 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2416 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2420 /* if still no information, we try to open the codec and to
2421 decompress the frame. We try to avoid that in most cases as
2422 it takes longer and uses more memory. For MPEG-4, we need to
2423 decompress for QuickTime.
2425 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2426 least one frame of codec data, this makes sure the codec initializes
2427 the channel configuration and does not only trust the values from the container.
2429 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2431 st->codec_info_nb_frames++;
2435 // close codecs which were opened in try_decode_frame()
2436 for(i=0;i<ic->nb_streams;i++) {
2437 st = ic->streams[i];
2438 avcodec_close(st->codec);
2440 for(i=0;i<ic->nb_streams;i++) {
2441 st = ic->streams[i];
2442 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2443 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2444 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2445 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2446 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2447 // the check for tb_unreliable() is not completely correct, since this is not about handling
2448 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2449 // ipmovie.c produces.
2450 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2451 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);
2452 if (st->info->duration_count && !st->r_frame_rate.num
2453 && tb_unreliable(st->codec) /*&&
2454 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2455 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2457 double best_error= 2*av_q2d(st->time_base);
2458 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2460 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2461 double error = st->info->duration_error[j] * get_std_framerate(j);
2462 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2463 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2464 if(error < best_error){
2466 num = get_std_framerate(j);
2469 // do not increase frame rate by more than 1 % in order to match a standard rate.
2470 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2471 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2473 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2474 if(!st->codec->bits_per_coded_sample)
2475 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2476 // set stream disposition based on audio service type
2477 switch (st->codec->audio_service_type) {
2478 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2479 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2480 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2481 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2482 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2483 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2484 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2485 st->disposition = AV_DISPOSITION_COMMENT; break;
2486 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2487 st->disposition = AV_DISPOSITION_KARAOKE; break;
2492 estimate_timings(ic, old_offset);
2494 compute_chapters_end(ic);
2496 find_stream_info_err:
2497 for (i=0; i < ic->nb_streams; i++) {
2498 if (ic->streams[i]->codec)
2499 ic->streams[i]->codec->thread_count = 0;
2500 av_freep(&ic->streams[i]->info);
2505 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2509 for (i = 0; i < ic->nb_programs; i++)
2510 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2511 if (ic->programs[i]->stream_index[j] == s)
2512 return ic->programs[i];
2516 int av_find_best_stream(AVFormatContext *ic,
2517 enum AVMediaType type,
2518 int wanted_stream_nb,
2520 AVCodec **decoder_ret,
2523 int i, nb_streams = ic->nb_streams;
2524 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2525 unsigned *program = NULL;
2526 AVCodec *decoder = NULL, *best_decoder = NULL;
2528 if (related_stream >= 0 && wanted_stream_nb < 0) {
2529 AVProgram *p = find_program_from_stream(ic, related_stream);
2531 program = p->stream_index;
2532 nb_streams = p->nb_stream_indexes;
2535 for (i = 0; i < nb_streams; i++) {
2536 int real_stream_index = program ? program[i] : i;
2537 AVStream *st = ic->streams[real_stream_index];
2538 AVCodecContext *avctx = st->codec;
2539 if (avctx->codec_type != type)
2541 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2543 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2546 decoder = avcodec_find_decoder(st->codec->codec_id);
2549 ret = AVERROR_DECODER_NOT_FOUND;
2553 if (best_count >= st->codec_info_nb_frames)
2555 best_count = st->codec_info_nb_frames;
2556 ret = real_stream_index;
2557 best_decoder = decoder;
2558 if (program && i == nb_streams - 1 && ret < 0) {
2560 nb_streams = ic->nb_streams;
2561 i = 0; /* no related stream found, try again with everything */
2565 *decoder_ret = best_decoder;
2569 /*******************************************************/
2571 int av_read_play(AVFormatContext *s)
2573 if (s->iformat->read_play)
2574 return s->iformat->read_play(s);
2576 return avio_pause(s->pb, 0);
2577 return AVERROR(ENOSYS);
2580 int av_read_pause(AVFormatContext *s)
2582 if (s->iformat->read_pause)
2583 return s->iformat->read_pause(s);
2585 return avio_pause(s->pb, 1);
2586 return AVERROR(ENOSYS);
2589 void avformat_free_context(AVFormatContext *s)
2595 if (s->iformat && s->iformat->priv_class && s->priv_data)
2596 av_opt_free(s->priv_data);
2598 for(i=0;i<s->nb_streams;i++) {
2599 /* free all data in a stream component */
2602 av_parser_close(st->parser);
2604 if (st->attached_pic.data)
2605 av_free_packet(&st->attached_pic);
2606 av_dict_free(&st->metadata);
2607 av_free(st->index_entries);
2608 av_free(st->codec->extradata);
2609 av_free(st->codec->subtitle_header);
2611 av_free(st->priv_data);
2615 for(i=s->nb_programs-1; i>=0; i--) {
2616 av_dict_free(&s->programs[i]->metadata);
2617 av_freep(&s->programs[i]->stream_index);
2618 av_freep(&s->programs[i]);
2620 av_freep(&s->programs);
2621 av_freep(&s->priv_data);
2622 while(s->nb_chapters--) {
2623 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2624 av_free(s->chapters[s->nb_chapters]);
2626 av_freep(&s->chapters);
2627 av_dict_free(&s->metadata);
2628 av_freep(&s->streams);
2632 #if FF_API_CLOSE_INPUT_FILE
2633 void av_close_input_file(AVFormatContext *s)
2635 avformat_close_input(&s);
2639 void avformat_close_input(AVFormatContext **ps)
2641 AVFormatContext *s = *ps;
2642 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2644 flush_packet_queue(s);
2645 if (s->iformat->read_close)
2646 s->iformat->read_close(s);
2647 avformat_free_context(s);
2653 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2659 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2661 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2664 s->streams = streams;
2666 st = av_mallocz(sizeof(AVStream));
2669 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2674 st->codec = avcodec_alloc_context3(c);
2676 /* no default bitrate if decoding */
2677 st->codec->bit_rate = 0;
2679 st->index = s->nb_streams;
2680 st->start_time = AV_NOPTS_VALUE;
2681 st->duration = AV_NOPTS_VALUE;
2682 /* we set the current DTS to 0 so that formats without any timestamps
2683 but durations get some timestamps, formats with some unknown
2684 timestamps have their first few packets buffered and the
2685 timestamps corrected before they are returned to the user */
2687 st->first_dts = AV_NOPTS_VALUE;
2688 st->probe_packets = MAX_PROBE_PACKETS;
2690 /* default pts setting is MPEG-like */
2691 avpriv_set_pts_info(st, 33, 1, 90000);
2692 st->last_IP_pts = AV_NOPTS_VALUE;
2693 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2694 st->pts_buffer[i]= AV_NOPTS_VALUE;
2695 st->reference_dts = AV_NOPTS_VALUE;
2697 st->sample_aspect_ratio = (AVRational){0,1};
2699 s->streams[s->nb_streams++] = st;
2703 AVProgram *av_new_program(AVFormatContext *ac, int id)
2705 AVProgram *program=NULL;
2708 av_dlog(ac, "new_program: id=0x%04x\n", id);
2710 for(i=0; i<ac->nb_programs; i++)
2711 if(ac->programs[i]->id == id)
2712 program = ac->programs[i];
2715 program = av_mallocz(sizeof(AVProgram));
2718 dynarray_add(&ac->programs, &ac->nb_programs, program);
2719 program->discard = AVDISCARD_NONE;
2726 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2728 AVChapter *chapter = NULL;
2731 for(i=0; i<s->nb_chapters; i++)
2732 if(s->chapters[i]->id == id)
2733 chapter = s->chapters[i];
2736 chapter= av_mallocz(sizeof(AVChapter));
2739 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2741 av_dict_set(&chapter->metadata, "title", title, 0);
2743 chapter->time_base= time_base;
2744 chapter->start = start;
2750 /************************************************************/
2751 /* output media file */
2753 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2755 const AVCodecTag *avctag;
2757 enum CodecID id = CODEC_ID_NONE;
2758 unsigned int tag = 0;
2761 * Check that tag + id is in the table
2762 * If neither is in the table -> OK
2763 * If tag is in the table with another id -> FAIL
2764 * If id is in the table with another tag -> FAIL unless strict < normal
2766 for (n = 0; s->oformat->codec_tag[n]; n++) {
2767 avctag = s->oformat->codec_tag[n];
2768 while (avctag->id != CODEC_ID_NONE) {
2769 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2771 if (id == st->codec->codec_id)
2774 if (avctag->id == st->codec->codec_id)
2779 if (id != CODEC_ID_NONE)
2781 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2786 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2790 AVDictionary *tmp = NULL;
2793 av_dict_copy(&tmp, *options, 0);
2794 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2797 // some sanity checks
2798 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2799 av_log(s, AV_LOG_ERROR, "no streams\n");
2800 ret = AVERROR(EINVAL);
2804 for(i=0;i<s->nb_streams;i++) {
2807 switch (st->codec->codec_type) {
2808 case AVMEDIA_TYPE_AUDIO:
2809 if(st->codec->sample_rate<=0){
2810 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2811 ret = AVERROR(EINVAL);
2814 if(!st->codec->block_align)
2815 st->codec->block_align = st->codec->channels *
2816 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2818 case AVMEDIA_TYPE_VIDEO:
2819 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2820 av_log(s, AV_LOG_ERROR, "time base not set\n");
2821 ret = AVERROR(EINVAL);
2824 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2825 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2826 ret = AVERROR(EINVAL);
2829 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2830 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2831 "(%d/%d) and encoder layer (%d/%d)\n",
2832 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2833 st->codec->sample_aspect_ratio.num,
2834 st->codec->sample_aspect_ratio.den);
2835 ret = AVERROR(EINVAL);
2841 if(s->oformat->codec_tag){
2842 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)){
2843 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2844 st->codec->codec_tag= 0;
2846 if(st->codec->codec_tag){
2847 if (!validate_codec_tag(s, st)) {
2849 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2850 av_log(s, AV_LOG_ERROR,
2851 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2852 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2853 ret = AVERROR_INVALIDDATA;
2857 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2860 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2861 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2862 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2865 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2866 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2867 if (!s->priv_data) {
2868 ret = AVERROR(ENOMEM);
2871 if (s->oformat->priv_class) {
2872 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2873 av_opt_set_defaults(s->priv_data);
2874 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2879 /* set muxer identification string */
2880 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2881 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2884 if(s->oformat->write_header){
2885 ret = s->oformat->write_header(s);
2890 /* init PTS generation */
2891 for(i=0;i<s->nb_streams;i++) {
2892 int64_t den = AV_NOPTS_VALUE;
2895 switch (st->codec->codec_type) {
2896 case AVMEDIA_TYPE_AUDIO:
2897 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2899 case AVMEDIA_TYPE_VIDEO:
2900 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2905 if (den != AV_NOPTS_VALUE) {
2907 ret = AVERROR_INVALIDDATA;
2910 frac_init(&st->pts, 0, 0, den);
2915 av_dict_free(options);
2924 //FIXME merge with compute_pkt_fields
2925 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2926 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2927 int num, den, frame_size, i;
2929 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2930 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2932 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2933 return AVERROR(EINVAL);*/
2935 /* duration field */
2936 if (pkt->duration == 0) {
2937 compute_frame_duration(&num, &den, st, NULL, pkt);
2939 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2943 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2946 //XXX/FIXME this is a temporary hack until all encoders output pts
2947 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2949 // pkt->pts= st->cur_dts;
2950 pkt->pts= st->pts.val;
2953 //calculate dts from pts
2954 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2955 st->pts_buffer[0]= pkt->pts;
2956 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2957 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2958 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2959 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2961 pkt->dts= st->pts_buffer[0];
2964 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2965 av_log(s, AV_LOG_ERROR,
2966 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2967 st->index, st->cur_dts, pkt->dts);
2968 return AVERROR(EINVAL);
2970 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2971 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2972 return AVERROR(EINVAL);
2975 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2976 st->cur_dts= pkt->dts;
2977 st->pts.val= pkt->dts;
2980 switch (st->codec->codec_type) {
2981 case AVMEDIA_TYPE_AUDIO:
2982 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
2984 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2985 likely equal to the encoder delay, but it would be better if we
2986 had the real timestamps from the encoder */
2987 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2988 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2991 case AVMEDIA_TYPE_VIDEO:
2992 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3000 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3005 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3006 return s->oformat->write_packet(s, pkt);
3010 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3012 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3015 ret= s->oformat->write_packet(s, pkt);
3018 s->streams[pkt->stream_index]->nb_frames++;
3022 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3023 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3025 AVPacketList **next_point, *this_pktl;
3027 this_pktl = av_mallocz(sizeof(AVPacketList));
3028 this_pktl->pkt= *pkt;
3029 pkt->destruct= NULL; // do not free original but only the copy
3030 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3032 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3033 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3035 next_point = &s->packet_buffer;
3038 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3039 while(!compare(s, &(*next_point)->pkt, pkt)){
3040 next_point= &(*next_point)->next;
3044 next_point = &(s->packet_buffer_end->next);
3047 assert(!*next_point);
3049 s->packet_buffer_end= this_pktl;
3052 this_pktl->next= *next_point;
3054 s->streams[pkt->stream_index]->last_in_packet_buffer=
3055 *next_point= this_pktl;
3058 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3060 AVStream *st = s->streams[ pkt ->stream_index];
3061 AVStream *st2= s->streams[ next->stream_index];
3062 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3066 return pkt->stream_index < next->stream_index;
3070 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3071 AVPacket *pkt, int flush)
3078 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3081 for(i=0; i < s->nb_streams; i++)
3082 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3084 if(stream_count && (s->nb_streams == stream_count || flush)){
3085 pktl= s->packet_buffer;
3088 s->packet_buffer= pktl->next;
3089 if(!s->packet_buffer)
3090 s->packet_buffer_end= NULL;
3092 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3093 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3097 av_init_packet(out);
3102 #if FF_API_INTERLEAVE_PACKET
3103 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3104 AVPacket *pkt, int flush)
3106 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3111 * Interleave an AVPacket correctly so it can be muxed.
3112 * @param out the interleaved packet will be output here
3113 * @param in the input packet
3114 * @param flush 1 if no further packets are available as input and all
3115 * remaining packets should be output
3116 * @return 1 if a packet was output, 0 if no packet could be output,
3117 * < 0 if an error occurred
3119 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3120 if (s->oformat->interleave_packet) {
3121 int ret = s->oformat->interleave_packet(s, out, in, flush);
3126 return ff_interleave_packet_per_dts(s, out, in, flush);
3129 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3133 AVStream *st= s->streams[ pkt->stream_index];
3135 //FIXME/XXX/HACK drop zero sized packets
3136 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3139 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3140 pkt->size, pkt->dts, pkt->pts);
3141 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3144 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3145 return AVERROR(EINVAL);
3147 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3153 int ret= interleave_packet(s, &opkt, pkt, flush);
3154 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3157 ret= s->oformat->write_packet(s, &opkt);
3159 s->streams[opkt.stream_index]->nb_frames++;
3161 av_free_packet(&opkt);
3169 int av_write_trailer(AVFormatContext *s)
3175 ret= interleave_packet(s, &pkt, NULL, 1);
3176 if(ret<0) //FIXME cleanup needed for ret<0 ?
3181 ret= s->oformat->write_packet(s, &pkt);
3183 s->streams[pkt.stream_index]->nb_frames++;
3185 av_free_packet(&pkt);
3191 if(s->oformat->write_trailer)
3192 ret = s->oformat->write_trailer(s);
3194 for(i=0;i<s->nb_streams;i++) {
3195 av_freep(&s->streams[i]->priv_data);
3196 av_freep(&s->streams[i]->index_entries);
3198 if (s->oformat->priv_class)
3199 av_opt_free(s->priv_data);
3200 av_freep(&s->priv_data);
3204 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3207 AVProgram *program=NULL;
3210 if (idx >= ac->nb_streams) {
3211 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3215 for(i=0; i<ac->nb_programs; i++){
3216 if(ac->programs[i]->id != progid)
3218 program = ac->programs[i];
3219 for(j=0; j<program->nb_stream_indexes; j++)
3220 if(program->stream_index[j] == idx)
3223 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3226 program->stream_index = tmp;
3227 program->stream_index[program->nb_stream_indexes++] = idx;
3232 static void print_fps(double d, const char *postfix){
3233 uint64_t v= lrintf(d*100);
3234 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3235 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3236 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3239 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3241 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3242 AVDictionaryEntry *tag=NULL;
3244 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3245 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3246 if(strcmp("language", tag->key))
3247 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3252 /* "user interface" functions */
3253 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3256 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3257 AVStream *st = ic->streams[i];
3258 int g = av_gcd(st->time_base.num, st->time_base.den);
3259 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3260 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3261 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3262 /* the pid is an important information, so we display it */
3263 /* XXX: add a generic system */
3264 if (flags & AVFMT_SHOW_IDS)
3265 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3267 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3268 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3269 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3270 if (st->sample_aspect_ratio.num && // default
3271 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3272 AVRational display_aspect_ratio;
3273 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3274 st->codec->width*st->sample_aspect_ratio.num,
3275 st->codec->height*st->sample_aspect_ratio.den,
3277 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3278 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3279 display_aspect_ratio.num, display_aspect_ratio.den);
3281 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3282 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3283 print_fps(av_q2d(st->avg_frame_rate), "fps");
3284 if(st->r_frame_rate.den && st->r_frame_rate.num)
3285 print_fps(av_q2d(st->r_frame_rate), "tbr");
3286 if(st->time_base.den && st->time_base.num)
3287 print_fps(1/av_q2d(st->time_base), "tbn");
3288 if(st->codec->time_base.den && st->codec->time_base.num)
3289 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3291 if (st->disposition & AV_DISPOSITION_DEFAULT)
3292 av_log(NULL, AV_LOG_INFO, " (default)");
3293 if (st->disposition & AV_DISPOSITION_DUB)
3294 av_log(NULL, AV_LOG_INFO, " (dub)");
3295 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3296 av_log(NULL, AV_LOG_INFO, " (original)");
3297 if (st->disposition & AV_DISPOSITION_COMMENT)
3298 av_log(NULL, AV_LOG_INFO, " (comment)");
3299 if (st->disposition & AV_DISPOSITION_LYRICS)
3300 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3301 if (st->disposition & AV_DISPOSITION_KARAOKE)
3302 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3303 if (st->disposition & AV_DISPOSITION_FORCED)
3304 av_log(NULL, AV_LOG_INFO, " (forced)");
3305 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3306 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3307 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3308 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3309 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3310 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3311 av_log(NULL, AV_LOG_INFO, "\n");
3312 dump_metadata(NULL, st->metadata, " ");
3315 void av_dump_format(AVFormatContext *ic,
3321 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3322 if (ic->nb_streams && !printed)
3325 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3326 is_output ? "Output" : "Input",
3328 is_output ? ic->oformat->name : ic->iformat->name,
3329 is_output ? "to" : "from", url);
3330 dump_metadata(NULL, ic->metadata, " ");
3332 av_log(NULL, AV_LOG_INFO, " Duration: ");
3333 if (ic->duration != AV_NOPTS_VALUE) {
3334 int hours, mins, secs, us;
3335 secs = ic->duration / AV_TIME_BASE;
3336 us = ic->duration % AV_TIME_BASE;
3341 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3342 (100 * us) / AV_TIME_BASE);
3344 av_log(NULL, AV_LOG_INFO, "N/A");
3346 if (ic->start_time != AV_NOPTS_VALUE) {
3348 av_log(NULL, AV_LOG_INFO, ", start: ");
3349 secs = ic->start_time / AV_TIME_BASE;
3350 us = abs(ic->start_time % AV_TIME_BASE);
3351 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3352 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3354 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3356 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3358 av_log(NULL, AV_LOG_INFO, "N/A");
3360 av_log(NULL, AV_LOG_INFO, "\n");
3362 for (i = 0; i < ic->nb_chapters; i++) {
3363 AVChapter *ch = ic->chapters[i];
3364 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3365 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3366 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3368 dump_metadata(NULL, ch->metadata, " ");
3370 if(ic->nb_programs) {
3371 int j, k, total = 0;
3372 for(j=0; j<ic->nb_programs; j++) {
3373 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3375 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3376 name ? name->value : "");
3377 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3378 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3379 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3380 printed[ic->programs[j]->stream_index[k]] = 1;
3382 total += ic->programs[j]->nb_stream_indexes;
3384 if (total < ic->nb_streams)
3385 av_log(NULL, AV_LOG_INFO, " No Program\n");
3387 for(i=0;i<ic->nb_streams;i++)
3389 dump_stream_format(ic, i, index, is_output);
3394 int64_t av_gettime(void)
3397 gettimeofday(&tv,NULL);
3398 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3401 uint64_t ff_ntp_time(void)
3403 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3406 int av_get_frame_filename(char *buf, int buf_size,
3407 const char *path, int number)
3410 char *q, buf1[20], c;
3411 int nd, len, percentd_found;
3423 while (isdigit(*p)) {
3424 nd = nd * 10 + *p++ - '0';
3427 } while (isdigit(c));
3436 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3438 if ((q - buf + len) > buf_size - 1)
3440 memcpy(q, buf1, len);
3448 if ((q - buf) < buf_size - 1)
3452 if (!percentd_found)
3461 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3465 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3467 for(i=0;i<size;i+=16) {
3474 PRINT(" %02x", buf[i+j]);
3479 for(j=0;j<len;j++) {
3481 if (c < ' ' || c > '~')
3490 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3492 hex_dump_internal(NULL, f, 0, buf, size);
3495 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3497 hex_dump_internal(avcl, NULL, level, buf, size);
3500 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3503 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3504 PRINT("stream #%d:\n", pkt->stream_index);
3505 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3506 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3507 /* DTS is _always_ valid after av_read_frame() */
3509 if (pkt->dts == AV_NOPTS_VALUE)
3512 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3513 /* PTS may not be known if B-frames are present. */
3515 if (pkt->pts == AV_NOPTS_VALUE)
3518 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3520 PRINT(" size=%d\n", pkt->size);
3523 av_hex_dump(f, pkt->data, pkt->size);
3526 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3528 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3531 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3534 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3537 void av_url_split(char *proto, int proto_size,
3538 char *authorization, int authorization_size,
3539 char *hostname, int hostname_size,
3541 char *path, int path_size,
3544 const char *p, *ls, *at, *col, *brk;
3546 if (port_ptr) *port_ptr = -1;
3547 if (proto_size > 0) proto[0] = 0;
3548 if (authorization_size > 0) authorization[0] = 0;
3549 if (hostname_size > 0) hostname[0] = 0;
3550 if (path_size > 0) path[0] = 0;
3552 /* parse protocol */
3553 if ((p = strchr(url, ':'))) {
3554 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3559 /* no protocol means plain filename */
3560 av_strlcpy(path, url, path_size);
3564 /* separate path from hostname */
3565 ls = strchr(p, '/');
3567 ls = strchr(p, '?');
3569 av_strlcpy(path, ls, path_size);
3571 ls = &p[strlen(p)]; // XXX
3573 /* the rest is hostname, use that to parse auth/port */
3575 /* authorization (user[:pass]@hostname) */
3576 if ((at = strchr(p, '@')) && at < ls) {
3577 av_strlcpy(authorization, p,
3578 FFMIN(authorization_size, at + 1 - p));
3579 p = at + 1; /* skip '@' */
3582 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3584 av_strlcpy(hostname, p + 1,
3585 FFMIN(hostname_size, brk - p));
3586 if (brk[1] == ':' && port_ptr)
3587 *port_ptr = atoi(brk + 2);
3588 } else if ((col = strchr(p, ':')) && col < ls) {
3589 av_strlcpy(hostname, p,
3590 FFMIN(col + 1 - p, hostname_size));
3591 if (port_ptr) *port_ptr = atoi(col + 1);
3593 av_strlcpy(hostname, p,
3594 FFMIN(ls + 1 - p, hostname_size));
3598 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3601 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3604 'C', 'D', 'E', 'F' };
3605 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3608 'c', 'd', 'e', 'f' };
3609 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3611 for(i = 0; i < s; i++) {
3612 buff[i * 2] = hex_table[src[i] >> 4];
3613 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3619 int ff_hex_to_data(uint8_t *data, const char *p)
3626 p += strspn(p, SPACE_CHARS);
3629 c = toupper((unsigned char) *p++);
3630 if (c >= '0' && c <= '9')
3632 else if (c >= 'A' && c <= 'F')
3647 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3648 unsigned int pts_num, unsigned int pts_den)
3651 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3652 if(new_tb.num != pts_num)
3653 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3655 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3657 if(new_tb.num <= 0 || new_tb.den <= 0) {
3658 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3661 s->time_base = new_tb;
3662 s->pts_wrap_bits = pts_wrap_bits;
3665 int ff_url_join(char *str, int size, const char *proto,
3666 const char *authorization, const char *hostname,
3667 int port, const char *fmt, ...)
3670 struct addrinfo hints = { 0 }, *ai;
3675 av_strlcatf(str, size, "%s://", proto);
3676 if (authorization && authorization[0])
3677 av_strlcatf(str, size, "%s@", authorization);
3678 #if CONFIG_NETWORK && defined(AF_INET6)
3679 /* Determine if hostname is a numerical IPv6 address,
3680 * properly escape it within [] in that case. */
3681 hints.ai_flags = AI_NUMERICHOST;
3682 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3683 if (ai->ai_family == AF_INET6) {
3684 av_strlcat(str, "[", size);
3685 av_strlcat(str, hostname, size);
3686 av_strlcat(str, "]", size);
3688 av_strlcat(str, hostname, size);
3693 /* Not an IPv6 address, just output the plain string. */
3694 av_strlcat(str, hostname, size);
3697 av_strlcatf(str, size, ":%d", port);
3700 int len = strlen(str);
3703 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3709 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3710 AVFormatContext *src)
3715 local_pkt.stream_index = dst_stream;
3716 if (pkt->pts != AV_NOPTS_VALUE)
3717 local_pkt.pts = av_rescale_q(pkt->pts,
3718 src->streams[pkt->stream_index]->time_base,
3719 dst->streams[dst_stream]->time_base);
3720 if (pkt->dts != AV_NOPTS_VALUE)
3721 local_pkt.dts = av_rescale_q(pkt->dts,
3722 src->streams[pkt->stream_index]->time_base,
3723 dst->streams[dst_stream]->time_base);
3724 return av_write_frame(dst, &local_pkt);
3727 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3730 const char *ptr = str;
3732 /* Parse key=value pairs. */
3735 char *dest = NULL, *dest_end;
3736 int key_len, dest_len = 0;
3738 /* Skip whitespace and potential commas. */
3739 while (*ptr && (isspace(*ptr) || *ptr == ','))
3746 if (!(ptr = strchr(key, '=')))
3749 key_len = ptr - key;
3751 callback_get_buf(context, key, key_len, &dest, &dest_len);
3752 dest_end = dest + dest_len - 1;
3756 while (*ptr && *ptr != '\"') {
3760 if (dest && dest < dest_end)
3764 if (dest && dest < dest_end)
3772 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3773 if (dest && dest < dest_end)
3781 int ff_find_stream_index(AVFormatContext *s, int id)
3784 for (i = 0; i < s->nb_streams; i++) {
3785 if (s->streams[i]->id == id)
3791 void ff_make_absolute_url(char *buf, int size, const char *base,
3795 /* Absolute path, relative to the current server */
3796 if (base && strstr(base, "://") && rel[0] == '/') {
3798 av_strlcpy(buf, base, size);
3799 sep = strstr(buf, "://");
3802 sep = strchr(sep, '/');
3806 av_strlcat(buf, rel, size);
3809 /* If rel actually is an absolute url, just copy it */
3810 if (!base || strstr(rel, "://") || rel[0] == '/') {
3811 av_strlcpy(buf, rel, size);
3815 av_strlcpy(buf, base, size);
3816 /* Remove the file name from the base url */
3817 sep = strrchr(buf, '/');
3822 while (av_strstart(rel, "../", NULL) && sep) {
3823 /* Remove the path delimiter at the end */
3825 sep = strrchr(buf, '/');
3826 /* If the next directory name to pop off is "..", break here */
3827 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3828 /* Readd the slash we just removed */
3829 av_strlcat(buf, "/", size);
3832 /* Cut off the directory name */
3839 av_strlcat(buf, rel, size);
3842 int64_t ff_iso8601_to_unix_time(const char *datestr)
3845 struct tm time1 = {0}, time2 = {0};
3847 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3848 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3850 return av_timegm(&time2);
3852 return av_timegm(&time1);
3854 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3855 "the date string.\n");
3860 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3863 if (ofmt->query_codec)
3864 return ofmt->query_codec(codec_id, std_compliance);
3865 else if (ofmt->codec_tag)
3866 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3867 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3868 codec_id == ofmt->subtitle_codec)
3871 return AVERROR_PATCHWELCOME;
3874 int avformat_network_init(void)
3878 ff_network_inited_globally = 1;
3879 if ((ret = ff_network_init()) < 0)
3886 int avformat_network_deinit(void)
3895 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3896 uint64_t channel_layout, int32_t sample_rate,
3897 int32_t width, int32_t height)
3903 return AVERROR(EINVAL);
3906 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3908 if (channel_layout) {
3910 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3914 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3916 if (width || height) {
3918 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3920 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3922 return AVERROR(ENOMEM);
3923 bytestream_put_le32(&data, flags);
3925 bytestream_put_le32(&data, channels);
3927 bytestream_put_le64(&data, channel_layout);
3929 bytestream_put_le32(&data, sample_rate);
3930 if (width || height) {
3931 bytestream_put_le32(&data, width);
3932 bytestream_put_le32(&data, height);
3937 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3939 return ff_codec_bmp_tags;
3941 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3943 return ff_codec_wav_tags;