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 && duration){
989 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
990 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
991 if(old_diff < new_diff && old_diff < (duration>>3)){
992 pkt->pts += duration;
993 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
997 /* presentation is not delayed : PTS and DTS are the same */
998 if(pkt->pts == AV_NOPTS_VALUE)
1000 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1001 if(pkt->pts == AV_NOPTS_VALUE)
1002 pkt->pts = st->cur_dts;
1003 pkt->dts = pkt->pts;
1004 if(pkt->pts != AV_NOPTS_VALUE)
1005 st->cur_dts = pkt->pts + duration;
1009 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1010 st->pts_buffer[0]= pkt->pts;
1011 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1012 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1013 if(pkt->dts == AV_NOPTS_VALUE)
1014 pkt->dts= st->pts_buffer[0];
1015 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1016 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1018 if(pkt->dts > st->cur_dts)
1019 st->cur_dts = pkt->dts;
1022 // 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);
1025 if(is_intra_only(st->codec))
1026 pkt->flags |= AV_PKT_FLAG_KEY;
1028 pkt->convergence_duration = pc->convergence_duration;
1031 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1034 AVPacketList *pktl = *pkt_buf;
1035 *pkt_buf = pktl->next;
1036 av_free_packet(&pktl->pkt);
1039 *pkt_buf_end = NULL;
1043 * Parse a packet, add all split parts to parse_queue
1045 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1047 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1049 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1050 AVStream *st = s->streams[stream_index];
1051 uint8_t *data = pkt ? pkt->data : NULL;
1052 int size = pkt ? pkt->size : 0;
1053 int ret = 0, got_output = 0;
1056 av_init_packet(&flush_pkt);
1061 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1064 av_init_packet(&out_pkt);
1065 len = av_parser_parse2(st->parser, st->codec,
1066 &out_pkt.data, &out_pkt.size, data, size,
1067 pkt->pts, pkt->dts, pkt->pos);
1069 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1070 /* increment read pointer */
1074 got_output = !!out_pkt.size;
1079 /* set the duration */
1080 out_pkt.duration = 0;
1081 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1082 if (st->codec->sample_rate > 0) {
1083 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1084 (AVRational){ 1, st->codec->sample_rate },
1088 } else if (st->codec->time_base.num != 0 &&
1089 st->codec->time_base.den != 0) {
1090 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1091 st->codec->time_base,
1096 out_pkt.stream_index = st->index;
1097 out_pkt.pts = st->parser->pts;
1098 out_pkt.dts = st->parser->dts;
1099 out_pkt.pos = st->parser->pos;
1101 if (st->parser->key_frame == 1 ||
1102 (st->parser->key_frame == -1 &&
1103 st->parser->pict_type == AV_PICTURE_TYPE_I))
1104 out_pkt.flags |= AV_PKT_FLAG_KEY;
1106 compute_pkt_fields(s, st, st->parser, &out_pkt);
1108 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1109 out_pkt.flags & AV_PKT_FLAG_KEY) {
1110 ff_reduce_index(s, st->index);
1111 av_add_index_entry(st, st->parser->frame_offset, out_pkt.dts,
1112 0, 0, AVINDEX_KEYFRAME);
1115 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1116 out_pkt.destruct = pkt->destruct;
1117 pkt->destruct = NULL;
1119 if ((ret = av_dup_packet(&out_pkt)) < 0)
1122 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1123 av_free_packet(&out_pkt);
1124 ret = AVERROR(ENOMEM);
1130 /* end of the stream => close and free the parser */
1131 if (pkt == &flush_pkt) {
1132 av_parser_close(st->parser);
1137 av_free_packet(pkt);
1141 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1142 AVPacketList **pkt_buffer_end,
1146 av_assert0(*pkt_buffer);
1149 *pkt_buffer = pktl->next;
1151 *pkt_buffer_end = NULL;
1156 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1158 int ret = 0, i, got_packet = 0;
1160 av_init_packet(pkt);
1162 while (!got_packet && !s->parse_queue) {
1166 /* read next packet */
1167 ret = ff_read_packet(s, &cur_pkt);
1169 if (ret == AVERROR(EAGAIN))
1171 /* flush the parsers */
1172 for(i = 0; i < s->nb_streams; i++) {
1174 if (st->parser && st->need_parsing)
1175 parse_packet(s, NULL, st->index);
1177 /* all remaining packets are now in parse_queue =>
1178 * really terminate parsing */
1182 st = s->streams[cur_pkt.stream_index];
1184 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1185 cur_pkt.dts != AV_NOPTS_VALUE &&
1186 cur_pkt.pts < cur_pkt.dts) {
1187 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1188 cur_pkt.stream_index,
1193 if (s->debug & FF_FDEBUG_TS)
1194 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1195 cur_pkt.stream_index,
1202 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1203 st->parser = av_parser_init(st->codec->codec_id);
1205 /* no parser available: just output the raw packets */
1206 st->need_parsing = AVSTREAM_PARSE_NONE;
1207 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1208 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1209 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1210 st->parser->flags |= PARSER_FLAG_ONCE;
1214 if (!st->need_parsing || !st->parser) {
1215 /* no parsing needed: we just output the packet as is */
1217 compute_pkt_fields(s, st, NULL, pkt);
1218 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1219 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1220 ff_reduce_index(s, st->index);
1221 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1224 } else if (st->discard < AVDISCARD_ALL) {
1225 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1229 av_free_packet(&cur_pkt);
1233 if (!got_packet && s->parse_queue)
1234 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1236 if(s->debug & FF_FDEBUG_TS)
1237 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1248 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1250 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1254 return s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1255 &s->packet_buffer_end,
1257 read_frame_internal(s, pkt);
1261 AVPacketList *pktl = s->packet_buffer;
1264 AVPacket *next_pkt = &pktl->pkt;
1266 if (next_pkt->dts != AV_NOPTS_VALUE) {
1267 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1268 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1269 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1270 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1271 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1272 next_pkt->pts = pktl->pkt.dts;
1276 pktl = s->packet_buffer;
1279 /* read packet from packet buffer, if there is data */
1280 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1281 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1282 return read_from_packet_buffer(&s->packet_buffer,
1283 &s->packet_buffer_end, pkt);
1286 ret = read_frame_internal(s, pkt);
1288 if (pktl && ret != AVERROR(EAGAIN)) {
1295 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1296 &s->packet_buffer_end)) < 0)
1297 return AVERROR(ENOMEM);
1301 /* XXX: suppress the packet queue */
1302 static void flush_packet_queue(AVFormatContext *s)
1304 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1305 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1306 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1308 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1311 /*******************************************************/
1314 int av_find_default_stream_index(AVFormatContext *s)
1316 int first_audio_index = -1;
1320 if (s->nb_streams <= 0)
1322 for(i = 0; i < s->nb_streams; i++) {
1324 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1325 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1328 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1329 first_audio_index = i;
1331 return first_audio_index >= 0 ? first_audio_index : 0;
1335 * Flush the frame reader.
1337 void ff_read_frame_flush(AVFormatContext *s)
1342 flush_packet_queue(s);
1344 /* for each stream, reset read state */
1345 for(i = 0; i < s->nb_streams; i++) {
1349 av_parser_close(st->parser);
1352 st->last_IP_pts = AV_NOPTS_VALUE;
1353 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1354 st->reference_dts = AV_NOPTS_VALUE;
1356 st->probe_packets = MAX_PROBE_PACKETS;
1358 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1359 st->pts_buffer[j]= AV_NOPTS_VALUE;
1363 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1367 for(i = 0; i < s->nb_streams; i++) {
1368 AVStream *st = s->streams[i];
1370 st->cur_dts = av_rescale(timestamp,
1371 st->time_base.den * (int64_t)ref_st->time_base.num,
1372 st->time_base.num * (int64_t)ref_st->time_base.den);
1376 void ff_reduce_index(AVFormatContext *s, int stream_index)
1378 AVStream *st= s->streams[stream_index];
1379 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1381 if((unsigned)st->nb_index_entries >= max_entries){
1383 for(i=0; 2*i<st->nb_index_entries; i++)
1384 st->index_entries[i]= st->index_entries[2*i];
1385 st->nb_index_entries= i;
1389 int ff_add_index_entry(AVIndexEntry **index_entries,
1390 int *nb_index_entries,
1391 unsigned int *index_entries_allocated_size,
1392 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1394 AVIndexEntry *entries, *ie;
1397 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1400 entries = av_fast_realloc(*index_entries,
1401 index_entries_allocated_size,
1402 (*nb_index_entries + 1) *
1403 sizeof(AVIndexEntry));
1407 *index_entries= entries;
1409 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1412 index= (*nb_index_entries)++;
1413 ie= &entries[index];
1414 assert(index==0 || ie[-1].timestamp < timestamp);
1416 ie= &entries[index];
1417 if(ie->timestamp != timestamp){
1418 if(ie->timestamp <= timestamp)
1420 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1421 (*nb_index_entries)++;
1422 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1423 distance= ie->min_distance;
1427 ie->timestamp = timestamp;
1428 ie->min_distance= distance;
1435 int av_add_index_entry(AVStream *st,
1436 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1438 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1439 &st->index_entries_allocated_size, pos,
1440 timestamp, size, distance, flags);
1443 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1444 int64_t wanted_timestamp, int flags)
1452 //optimize appending index entries at the end
1453 if(b && entries[b-1].timestamp < wanted_timestamp)
1458 timestamp = entries[m].timestamp;
1459 if(timestamp >= wanted_timestamp)
1461 if(timestamp <= wanted_timestamp)
1464 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1466 if(!(flags & AVSEEK_FLAG_ANY)){
1467 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1468 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1477 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1480 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1481 wanted_timestamp, flags);
1484 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1486 AVInputFormat *avif= s->iformat;
1487 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1488 int64_t ts_min, ts_max, ts;
1493 if (stream_index < 0)
1496 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1499 ts_min= AV_NOPTS_VALUE;
1500 pos_limit= -1; //gcc falsely says it may be uninitialized
1502 st= s->streams[stream_index];
1503 if(st->index_entries){
1506 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()
1507 index= FFMAX(index, 0);
1508 e= &st->index_entries[index];
1510 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1512 ts_min= e->timestamp;
1513 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1519 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1520 assert(index < st->nb_index_entries);
1522 e= &st->index_entries[index];
1523 assert(e->timestamp >= target_ts);
1525 ts_max= e->timestamp;
1526 pos_limit= pos_max - e->min_distance;
1527 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1528 pos_max,pos_limit, ts_max);
1532 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1537 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1540 ff_update_cur_dts(s, st, ts);
1545 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1546 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1547 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1548 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1551 int64_t start_pos, filesize;
1554 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1556 if(ts_min == AV_NOPTS_VALUE){
1557 pos_min = s->data_offset;
1558 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1559 if (ts_min == AV_NOPTS_VALUE)
1563 if(ts_max == AV_NOPTS_VALUE){
1565 filesize = avio_size(s->pb);
1566 pos_max = filesize - 1;
1569 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1571 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1572 if (ts_max == AV_NOPTS_VALUE)
1576 int64_t tmp_pos= pos_max + 1;
1577 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1578 if(tmp_ts == AV_NOPTS_VALUE)
1582 if(tmp_pos >= filesize)
1588 if(ts_min > ts_max){
1590 }else if(ts_min == ts_max){
1595 while (pos_min < pos_limit) {
1596 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1597 pos_min, pos_max, ts_min, ts_max);
1598 assert(pos_limit <= pos_max);
1601 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1602 // interpolate position (better than dichotomy)
1603 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1604 + pos_min - approximate_keyframe_distance;
1605 }else if(no_change==1){
1606 // bisection, if interpolation failed to change min or max pos last time
1607 pos = (pos_min + pos_limit)>>1;
1609 /* linear search if bisection failed, can only happen if there
1610 are very few or no keyframes between min/max */
1615 else if(pos > pos_limit)
1619 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1624 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1625 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1626 pos_limit, start_pos, no_change);
1627 if(ts == AV_NOPTS_VALUE){
1628 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1631 assert(ts != AV_NOPTS_VALUE);
1632 if (target_ts <= ts) {
1633 pos_limit = start_pos - 1;
1637 if (target_ts >= ts) {
1643 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1644 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1646 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1648 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1649 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1650 pos, ts_min, target_ts, ts_max);
1655 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1656 int64_t pos_min, pos_max;
1658 pos_min = s->data_offset;
1659 pos_max = avio_size(s->pb) - 1;
1661 if (pos < pos_min) pos= pos_min;
1662 else if(pos > pos_max) pos= pos_max;
1664 avio_seek(s->pb, pos, SEEK_SET);
1669 static int seek_frame_generic(AVFormatContext *s,
1670 int stream_index, int64_t timestamp, int flags)
1677 st = s->streams[stream_index];
1679 index = av_index_search_timestamp(st, timestamp, flags);
1681 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1684 if(index < 0 || index==st->nb_index_entries-1){
1687 if(st->nb_index_entries){
1688 assert(st->index_entries);
1689 ie= &st->index_entries[st->nb_index_entries-1];
1690 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1692 ff_update_cur_dts(s, st, ie->timestamp);
1694 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1700 read_status = av_read_frame(s, &pkt);
1701 } while (read_status == AVERROR(EAGAIN));
1702 if (read_status < 0)
1704 av_free_packet(&pkt);
1705 if(stream_index == pkt.stream_index){
1706 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1710 index = av_index_search_timestamp(st, timestamp, flags);
1715 ff_read_frame_flush(s);
1716 if (s->iformat->read_seek){
1717 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1720 ie = &st->index_entries[index];
1721 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1723 ff_update_cur_dts(s, st, ie->timestamp);
1728 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1729 int64_t timestamp, int flags)
1734 if (flags & AVSEEK_FLAG_BYTE) {
1735 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1737 ff_read_frame_flush(s);
1738 return seek_frame_byte(s, stream_index, timestamp, flags);
1741 if(stream_index < 0){
1742 stream_index= av_find_default_stream_index(s);
1743 if(stream_index < 0)
1746 st= s->streams[stream_index];
1747 /* timestamp for default must be expressed in AV_TIME_BASE units */
1748 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1751 /* first, we try the format specific seek */
1752 if (s->iformat->read_seek) {
1753 ff_read_frame_flush(s);
1754 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1761 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1762 ff_read_frame_flush(s);
1763 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1764 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1765 ff_read_frame_flush(s);
1766 return seek_frame_generic(s, stream_index, timestamp, flags);
1772 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1774 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1777 queue_attached_pictures(s);
1782 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1784 if(min_ts > ts || max_ts < ts)
1787 if (s->iformat->read_seek2) {
1789 ff_read_frame_flush(s);
1790 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1793 queue_attached_pictures(s);
1797 if(s->iformat->read_timestamp){
1798 //try to seek via read_timestamp()
1801 //Fallback to old API if new is not implemented but old is
1802 //Note the old has somewat different sematics
1803 if(s->iformat->read_seek || 1)
1804 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1806 // try some generic seek like seek_frame_generic() but with new ts semantics
1809 /*******************************************************/
1812 * Return TRUE if the stream has accurate duration in any stream.
1814 * @return TRUE if the stream has accurate duration for at least one component.
1816 static int has_duration(AVFormatContext *ic)
1821 for(i = 0;i < ic->nb_streams; i++) {
1822 st = ic->streams[i];
1823 if (st->duration != AV_NOPTS_VALUE)
1830 * Estimate the stream timings from the one of each components.
1832 * Also computes the global bitrate if possible.
1834 static void update_stream_timings(AVFormatContext *ic)
1836 int64_t start_time, start_time1, end_time, end_time1;
1837 int64_t duration, duration1, filesize;
1841 start_time = INT64_MAX;
1842 end_time = INT64_MIN;
1843 duration = INT64_MIN;
1844 for(i = 0;i < ic->nb_streams; i++) {
1845 st = ic->streams[i];
1846 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1847 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1848 start_time = FFMIN(start_time, start_time1);
1849 if (st->duration != AV_NOPTS_VALUE) {
1850 end_time1 = start_time1
1851 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1852 end_time = FFMAX(end_time, end_time1);
1855 if (st->duration != AV_NOPTS_VALUE) {
1856 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1857 duration = FFMAX(duration, duration1);
1860 if (start_time != INT64_MAX) {
1861 ic->start_time = start_time;
1862 if (end_time != INT64_MIN)
1863 duration = FFMAX(duration, end_time - start_time);
1865 if (duration != INT64_MIN) {
1866 ic->duration = duration;
1867 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1868 /* compute the bitrate */
1869 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1870 (double)ic->duration;
1875 static void fill_all_stream_timings(AVFormatContext *ic)
1880 update_stream_timings(ic);
1881 for(i = 0;i < ic->nb_streams; i++) {
1882 st = ic->streams[i];
1883 if (st->start_time == AV_NOPTS_VALUE) {
1884 if(ic->start_time != AV_NOPTS_VALUE)
1885 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1886 if(ic->duration != AV_NOPTS_VALUE)
1887 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1892 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1894 int64_t filesize, duration;
1898 /* if bit_rate is already set, we believe it */
1899 if (ic->bit_rate <= 0) {
1901 for(i=0;i<ic->nb_streams;i++) {
1902 st = ic->streams[i];
1903 if (st->codec->bit_rate > 0)
1904 bit_rate += st->codec->bit_rate;
1906 ic->bit_rate = bit_rate;
1909 /* if duration is already set, we believe it */
1910 if (ic->duration == AV_NOPTS_VALUE &&
1911 ic->bit_rate != 0) {
1912 filesize = ic->pb ? avio_size(ic->pb) : 0;
1914 for(i = 0; i < ic->nb_streams; i++) {
1915 st = ic->streams[i];
1916 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1917 if (st->duration == AV_NOPTS_VALUE)
1918 st->duration = duration;
1924 #define DURATION_MAX_READ_SIZE 250000
1925 #define DURATION_MAX_RETRY 3
1927 /* only usable for MPEG-PS streams */
1928 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1930 AVPacket pkt1, *pkt = &pkt1;
1932 int read_size, i, ret;
1934 int64_t filesize, offset, duration;
1937 /* flush packet queue */
1938 flush_packet_queue(ic);
1940 for (i=0; i<ic->nb_streams; i++) {
1941 st = ic->streams[i];
1942 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1943 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1946 av_parser_close(st->parser);
1951 /* estimate the end time (duration) */
1952 /* XXX: may need to support wrapping */
1953 filesize = ic->pb ? avio_size(ic->pb) : 0;
1954 end_time = AV_NOPTS_VALUE;
1956 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1960 avio_seek(ic->pb, offset, SEEK_SET);
1963 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1967 ret = ff_read_packet(ic, pkt);
1968 } while(ret == AVERROR(EAGAIN));
1971 read_size += pkt->size;
1972 st = ic->streams[pkt->stream_index];
1973 if (pkt->pts != AV_NOPTS_VALUE &&
1974 (st->start_time != AV_NOPTS_VALUE ||
1975 st->first_dts != AV_NOPTS_VALUE)) {
1976 duration = end_time = pkt->pts;
1977 if (st->start_time != AV_NOPTS_VALUE)
1978 duration -= st->start_time;
1980 duration -= st->first_dts;
1982 duration += 1LL<<st->pts_wrap_bits;
1984 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1985 st->duration = duration;
1988 av_free_packet(pkt);
1990 }while( end_time==AV_NOPTS_VALUE
1991 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1992 && ++retry <= DURATION_MAX_RETRY);
1994 fill_all_stream_timings(ic);
1996 avio_seek(ic->pb, old_offset, SEEK_SET);
1997 for (i=0; i<ic->nb_streams; i++) {
1999 st->cur_dts= st->first_dts;
2000 st->last_IP_pts = AV_NOPTS_VALUE;
2001 st->reference_dts = AV_NOPTS_VALUE;
2005 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2009 /* get the file size, if possible */
2010 if (ic->iformat->flags & AVFMT_NOFILE) {
2013 file_size = avio_size(ic->pb);
2014 file_size = FFMAX(0, file_size);
2017 if ((!strcmp(ic->iformat->name, "mpeg") ||
2018 !strcmp(ic->iformat->name, "mpegts")) &&
2019 file_size && ic->pb->seekable) {
2020 /* get accurate estimate from the PTSes */
2021 estimate_timings_from_pts(ic, old_offset);
2022 } else if (has_duration(ic)) {
2023 /* at least one component has timings - we use them for all
2025 fill_all_stream_timings(ic);
2027 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2028 /* less precise: use bitrate info */
2029 estimate_timings_from_bit_rate(ic);
2031 update_stream_timings(ic);
2035 AVStream av_unused *st;
2036 for(i = 0;i < ic->nb_streams; i++) {
2037 st = ic->streams[i];
2038 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2039 (double) st->start_time / AV_TIME_BASE,
2040 (double) st->duration / AV_TIME_BASE);
2042 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2043 (double) ic->start_time / AV_TIME_BASE,
2044 (double) ic->duration / AV_TIME_BASE,
2045 ic->bit_rate / 1000);
2049 static int has_codec_parameters(AVStream *st)
2051 AVCodecContext *avctx = st->codec;
2053 switch (avctx->codec_type) {
2054 case AVMEDIA_TYPE_AUDIO:
2055 val = avctx->sample_rate && avctx->channels;
2056 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2059 case AVMEDIA_TYPE_VIDEO:
2061 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2068 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2071 static int has_decode_delay_been_guessed(AVStream *st)
2073 return st->codec->codec_id != CODEC_ID_H264 ||
2074 st->info->nb_decoded_frames >= 6;
2077 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2078 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2081 int got_picture = 1, ret = 0;
2083 AVPacket pkt = *avpkt;
2085 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2086 AVDictionary *thread_opt = NULL;
2088 codec = st->codec->codec ? st->codec->codec :
2089 avcodec_find_decoder(st->codec->codec_id);
2092 st->info->found_decoder = -1;
2096 /* force thread count to 1 since the h264 decoder will not extract SPS
2097 * and PPS to extradata during multi-threaded decoding */
2098 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2099 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2101 av_dict_free(&thread_opt);
2103 st->info->found_decoder = -1;
2106 st->info->found_decoder = 1;
2107 } else if (!st->info->found_decoder)
2108 st->info->found_decoder = 1;
2110 if (st->info->found_decoder < 0)
2113 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2115 (!has_codec_parameters(st) ||
2116 !has_decode_delay_been_guessed(st) ||
2117 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2119 avcodec_get_frame_defaults(&picture);
2120 switch(st->codec->codec_type) {
2121 case AVMEDIA_TYPE_VIDEO:
2122 ret = avcodec_decode_video2(st->codec, &picture,
2123 &got_picture, &pkt);
2125 case AVMEDIA_TYPE_AUDIO:
2126 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2133 st->info->nb_decoded_frames++;
2142 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2144 while (tags->id != CODEC_ID_NONE) {
2152 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2155 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2156 if(tag == tags[i].tag)
2159 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2160 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2163 return CODEC_ID_NONE;
2166 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2169 for(i=0; tags && tags[i]; i++){
2170 int tag= ff_codec_get_tag(tags[i], id);
2176 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2179 for(i=0; tags && tags[i]; i++){
2180 enum CodecID id= ff_codec_get_id(tags[i], tag);
2181 if(id!=CODEC_ID_NONE) return id;
2183 return CODEC_ID_NONE;
2186 static void compute_chapters_end(AVFormatContext *s)
2189 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2191 for (i = 0; i < s->nb_chapters; i++)
2192 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2193 AVChapter *ch = s->chapters[i];
2194 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2197 for (j = 0; j < s->nb_chapters; j++) {
2198 AVChapter *ch1 = s->chapters[j];
2199 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2200 if (j != i && next_start > ch->start && next_start < end)
2203 ch->end = (end == INT64_MAX) ? ch->start : end;
2207 static int get_std_framerate(int i){
2208 if(i<60*12) return i*1001;
2209 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2213 * Is the time base unreliable.
2214 * This is a heuristic to balance between quick acceptance of the values in
2215 * the headers vs. some extra checks.
2216 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2217 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2218 * And there are "variable" fps files this needs to detect as well.
2220 static int tb_unreliable(AVCodecContext *c){
2221 if( c->time_base.den >= 101L*c->time_base.num
2222 || c->time_base.den < 5L*c->time_base.num
2223 /* || c->codec_tag == AV_RL32("DIVX")
2224 || c->codec_tag == AV_RL32("XVID")*/
2225 || c->codec_id == CODEC_ID_MPEG2VIDEO
2226 || c->codec_id == CODEC_ID_H264
2232 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2234 int i, count, ret, read_size, j;
2236 AVPacket pkt1, *pkt;
2237 int64_t old_offset = avio_tell(ic->pb);
2238 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2240 for(i=0;i<ic->nb_streams;i++) {
2242 AVDictionary *thread_opt = NULL;
2243 st = ic->streams[i];
2245 //only for the split stuff
2246 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2247 st->parser = av_parser_init(st->codec->codec_id);
2248 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2249 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2252 codec = st->codec->codec ? st->codec->codec :
2253 avcodec_find_decoder(st->codec->codec_id);
2255 /* force thread count to 1 since the h264 decoder will not extract SPS
2256 * and PPS to extradata during multi-threaded decoding */
2257 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2259 /* Ensure that subtitle_header is properly set. */
2260 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2261 && codec && !st->codec->codec)
2262 avcodec_open2(st->codec, codec, options ? &options[i]
2265 //try to just open decoders, in case this is enough to get parameters
2266 if (!has_codec_parameters(st)) {
2267 if (codec && !st->codec->codec)
2268 avcodec_open2(st->codec, codec, options ? &options[i]
2272 av_dict_free(&thread_opt);
2275 for (i=0; i<ic->nb_streams; i++) {
2276 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2282 if (ff_check_interrupt(&ic->interrupt_callback)){
2284 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2288 /* check if one codec still needs to be handled */
2289 for(i=0;i<ic->nb_streams;i++) {
2290 int fps_analyze_framecount = 20;
2292 st = ic->streams[i];
2293 if (!has_codec_parameters(st))
2295 /* if the timebase is coarse (like the usual millisecond precision
2296 of mkv), we need to analyze more frames to reliably arrive at
2298 if (av_q2d(st->time_base) > 0.0005)
2299 fps_analyze_framecount *= 2;
2300 if (ic->fps_probe_size >= 0)
2301 fps_analyze_framecount = ic->fps_probe_size;
2302 /* variable fps and no guess at the real fps */
2303 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2304 && st->info->duration_count < fps_analyze_framecount
2305 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2307 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2309 if(st->first_dts == AV_NOPTS_VALUE)
2312 if (i == ic->nb_streams) {
2313 /* NOTE: if the format has no header, then we need to read
2314 some packets to get most of the streams, so we cannot
2316 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2317 /* if we found the info for all the codecs, we can stop */
2319 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2323 /* we did not get all the codec info, but we read too much data */
2324 if (read_size >= ic->probesize) {
2326 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2330 /* NOTE: a new stream can be added there if no header in file
2331 (AVFMTCTX_NOHEADER) */
2332 ret = read_frame_internal(ic, &pkt1);
2333 if (ret == AVERROR(EAGAIN))
2338 AVPacket empty_pkt = { 0 };
2340 av_init_packet(&empty_pkt);
2342 ret = -1; /* we could not have all the codec parameters before EOF */
2343 for(i=0;i<ic->nb_streams;i++) {
2344 st = ic->streams[i];
2346 /* flush the decoders */
2347 if (st->info->found_decoder == 1) {
2349 err = try_decode_frame(st, &empty_pkt,
2350 (options && i < orig_nb_streams) ?
2351 &options[i] : NULL);
2352 } while (err > 0 && !has_codec_parameters(st));
2356 av_log(ic, AV_LOG_WARNING,
2357 "decoding for stream %d failed\n", st->index);
2358 } else if (!has_codec_parameters(st)) {
2360 avcodec_string(buf, sizeof(buf), st->codec, 0);
2361 av_log(ic, AV_LOG_WARNING,
2362 "Could not find codec parameters (%s)\n", buf);
2370 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2371 if ((ret = av_dup_packet(pkt)) < 0)
2372 goto find_stream_info_err;
2374 read_size += pkt->size;
2376 st = ic->streams[pkt->stream_index];
2377 if (st->codec_info_nb_frames>1) {
2378 if (av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2379 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2382 st->info->codec_info_duration += pkt->duration;
2385 int64_t last = st->info->last_dts;
2387 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2388 int64_t duration= pkt->dts - last;
2389 double dur= duration * av_q2d(st->time_base);
2391 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2392 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2393 if (st->info->duration_count < 2)
2394 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2395 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2396 int framerate= get_std_framerate(i);
2397 int ticks= lrintf(dur*framerate/(1001*12));
2398 double error = dur - (double)ticks*1001*12 / framerate;
2399 st->info->duration_error[i] += error*error;
2401 st->info->duration_count++;
2402 // ignore the first 4 values, they might have some random jitter
2403 if (st->info->duration_count > 3)
2404 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2406 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2407 st->info->last_dts = pkt->dts;
2409 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2410 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2411 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2412 st->codec->extradata_size= i;
2413 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2414 if (!st->codec->extradata)
2415 return AVERROR(ENOMEM);
2416 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2417 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2421 /* if still no information, we try to open the codec and to
2422 decompress the frame. We try to avoid that in most cases as
2423 it takes longer and uses more memory. For MPEG-4, we need to
2424 decompress for QuickTime.
2426 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2427 least one frame of codec data, this makes sure the codec initializes
2428 the channel configuration and does not only trust the values from the container.
2430 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2432 st->codec_info_nb_frames++;
2436 // close codecs which were opened in try_decode_frame()
2437 for(i=0;i<ic->nb_streams;i++) {
2438 st = ic->streams[i];
2439 avcodec_close(st->codec);
2441 for(i=0;i<ic->nb_streams;i++) {
2442 st = ic->streams[i];
2443 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2444 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2445 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2446 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2447 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2448 // the check for tb_unreliable() is not completely correct, since this is not about handling
2449 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2450 // ipmovie.c produces.
2451 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2452 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);
2453 if (st->info->duration_count && !st->r_frame_rate.num
2454 && tb_unreliable(st->codec) /*&&
2455 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2456 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2458 double best_error= 2*av_q2d(st->time_base);
2459 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2461 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2462 double error = st->info->duration_error[j] * get_std_framerate(j);
2463 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2464 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2465 if(error < best_error){
2467 num = get_std_framerate(j);
2470 // do not increase frame rate by more than 1 % in order to match a standard rate.
2471 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2472 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2474 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2475 if(!st->codec->bits_per_coded_sample)
2476 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2477 // set stream disposition based on audio service type
2478 switch (st->codec->audio_service_type) {
2479 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2480 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2481 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2482 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2483 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2484 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2485 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2486 st->disposition = AV_DISPOSITION_COMMENT; break;
2487 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2488 st->disposition = AV_DISPOSITION_KARAOKE; break;
2493 estimate_timings(ic, old_offset);
2495 compute_chapters_end(ic);
2497 find_stream_info_err:
2498 for (i=0; i < ic->nb_streams; i++) {
2499 if (ic->streams[i]->codec)
2500 ic->streams[i]->codec->thread_count = 0;
2501 av_freep(&ic->streams[i]->info);
2506 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2510 for (i = 0; i < ic->nb_programs; i++)
2511 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2512 if (ic->programs[i]->stream_index[j] == s)
2513 return ic->programs[i];
2517 int av_find_best_stream(AVFormatContext *ic,
2518 enum AVMediaType type,
2519 int wanted_stream_nb,
2521 AVCodec **decoder_ret,
2524 int i, nb_streams = ic->nb_streams;
2525 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2526 unsigned *program = NULL;
2527 AVCodec *decoder = NULL, *best_decoder = NULL;
2529 if (related_stream >= 0 && wanted_stream_nb < 0) {
2530 AVProgram *p = find_program_from_stream(ic, related_stream);
2532 program = p->stream_index;
2533 nb_streams = p->nb_stream_indexes;
2536 for (i = 0; i < nb_streams; i++) {
2537 int real_stream_index = program ? program[i] : i;
2538 AVStream *st = ic->streams[real_stream_index];
2539 AVCodecContext *avctx = st->codec;
2540 if (avctx->codec_type != type)
2542 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2544 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2547 decoder = avcodec_find_decoder(st->codec->codec_id);
2550 ret = AVERROR_DECODER_NOT_FOUND;
2554 if (best_count >= st->codec_info_nb_frames)
2556 best_count = st->codec_info_nb_frames;
2557 ret = real_stream_index;
2558 best_decoder = decoder;
2559 if (program && i == nb_streams - 1 && ret < 0) {
2561 nb_streams = ic->nb_streams;
2562 i = 0; /* no related stream found, try again with everything */
2566 *decoder_ret = best_decoder;
2570 /*******************************************************/
2572 int av_read_play(AVFormatContext *s)
2574 if (s->iformat->read_play)
2575 return s->iformat->read_play(s);
2577 return avio_pause(s->pb, 0);
2578 return AVERROR(ENOSYS);
2581 int av_read_pause(AVFormatContext *s)
2583 if (s->iformat->read_pause)
2584 return s->iformat->read_pause(s);
2586 return avio_pause(s->pb, 1);
2587 return AVERROR(ENOSYS);
2590 void avformat_free_context(AVFormatContext *s)
2596 if (s->iformat && s->iformat->priv_class && s->priv_data)
2597 av_opt_free(s->priv_data);
2599 for(i=0;i<s->nb_streams;i++) {
2600 /* free all data in a stream component */
2603 av_parser_close(st->parser);
2605 if (st->attached_pic.data)
2606 av_free_packet(&st->attached_pic);
2607 av_dict_free(&st->metadata);
2608 av_free(st->index_entries);
2609 av_free(st->codec->extradata);
2610 av_free(st->codec->subtitle_header);
2612 av_free(st->priv_data);
2616 for(i=s->nb_programs-1; i>=0; i--) {
2617 av_dict_free(&s->programs[i]->metadata);
2618 av_freep(&s->programs[i]->stream_index);
2619 av_freep(&s->programs[i]);
2621 av_freep(&s->programs);
2622 av_freep(&s->priv_data);
2623 while(s->nb_chapters--) {
2624 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2625 av_free(s->chapters[s->nb_chapters]);
2627 av_freep(&s->chapters);
2628 av_dict_free(&s->metadata);
2629 av_freep(&s->streams);
2633 #if FF_API_CLOSE_INPUT_FILE
2634 void av_close_input_file(AVFormatContext *s)
2636 avformat_close_input(&s);
2640 void avformat_close_input(AVFormatContext **ps)
2642 AVFormatContext *s = *ps;
2643 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2645 flush_packet_queue(s);
2646 if (s->iformat->read_close)
2647 s->iformat->read_close(s);
2648 avformat_free_context(s);
2654 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2660 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2662 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2665 s->streams = streams;
2667 st = av_mallocz(sizeof(AVStream));
2670 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2675 st->codec = avcodec_alloc_context3(c);
2677 /* no default bitrate if decoding */
2678 st->codec->bit_rate = 0;
2680 st->index = s->nb_streams;
2681 st->start_time = AV_NOPTS_VALUE;
2682 st->duration = AV_NOPTS_VALUE;
2683 /* we set the current DTS to 0 so that formats without any timestamps
2684 but durations get some timestamps, formats with some unknown
2685 timestamps have their first few packets buffered and the
2686 timestamps corrected before they are returned to the user */
2688 st->first_dts = AV_NOPTS_VALUE;
2689 st->probe_packets = MAX_PROBE_PACKETS;
2691 /* default pts setting is MPEG-like */
2692 avpriv_set_pts_info(st, 33, 1, 90000);
2693 st->last_IP_pts = AV_NOPTS_VALUE;
2694 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2695 st->pts_buffer[i]= AV_NOPTS_VALUE;
2696 st->reference_dts = AV_NOPTS_VALUE;
2698 st->sample_aspect_ratio = (AVRational){0,1};
2700 s->streams[s->nb_streams++] = st;
2704 AVProgram *av_new_program(AVFormatContext *ac, int id)
2706 AVProgram *program=NULL;
2709 av_dlog(ac, "new_program: id=0x%04x\n", id);
2711 for(i=0; i<ac->nb_programs; i++)
2712 if(ac->programs[i]->id == id)
2713 program = ac->programs[i];
2716 program = av_mallocz(sizeof(AVProgram));
2719 dynarray_add(&ac->programs, &ac->nb_programs, program);
2720 program->discard = AVDISCARD_NONE;
2727 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2729 AVChapter *chapter = NULL;
2732 for(i=0; i<s->nb_chapters; i++)
2733 if(s->chapters[i]->id == id)
2734 chapter = s->chapters[i];
2737 chapter= av_mallocz(sizeof(AVChapter));
2740 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2742 av_dict_set(&chapter->metadata, "title", title, 0);
2744 chapter->time_base= time_base;
2745 chapter->start = start;
2751 /************************************************************/
2752 /* output media file */
2754 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2756 const AVCodecTag *avctag;
2758 enum CodecID id = CODEC_ID_NONE;
2759 unsigned int tag = 0;
2762 * Check that tag + id is in the table
2763 * If neither is in the table -> OK
2764 * If tag is in the table with another id -> FAIL
2765 * If id is in the table with another tag -> FAIL unless strict < normal
2767 for (n = 0; s->oformat->codec_tag[n]; n++) {
2768 avctag = s->oformat->codec_tag[n];
2769 while (avctag->id != CODEC_ID_NONE) {
2770 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2772 if (id == st->codec->codec_id)
2775 if (avctag->id == st->codec->codec_id)
2780 if (id != CODEC_ID_NONE)
2782 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2787 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2791 AVDictionary *tmp = NULL;
2794 av_dict_copy(&tmp, *options, 0);
2795 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2798 // some sanity checks
2799 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2800 av_log(s, AV_LOG_ERROR, "no streams\n");
2801 ret = AVERROR(EINVAL);
2805 for(i=0;i<s->nb_streams;i++) {
2808 switch (st->codec->codec_type) {
2809 case AVMEDIA_TYPE_AUDIO:
2810 if(st->codec->sample_rate<=0){
2811 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2812 ret = AVERROR(EINVAL);
2815 if(!st->codec->block_align)
2816 st->codec->block_align = st->codec->channels *
2817 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2819 case AVMEDIA_TYPE_VIDEO:
2820 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2821 av_log(s, AV_LOG_ERROR, "time base not set\n");
2822 ret = AVERROR(EINVAL);
2825 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2826 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2827 ret = AVERROR(EINVAL);
2830 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2831 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2832 "(%d/%d) and encoder layer (%d/%d)\n",
2833 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2834 st->codec->sample_aspect_ratio.num,
2835 st->codec->sample_aspect_ratio.den);
2836 ret = AVERROR(EINVAL);
2842 if(s->oformat->codec_tag){
2843 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)){
2844 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2845 st->codec->codec_tag= 0;
2847 if(st->codec->codec_tag){
2848 if (!validate_codec_tag(s, st)) {
2850 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2851 av_log(s, AV_LOG_ERROR,
2852 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2853 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2854 ret = AVERROR_INVALIDDATA;
2858 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2861 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2862 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2863 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2866 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2867 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2868 if (!s->priv_data) {
2869 ret = AVERROR(ENOMEM);
2872 if (s->oformat->priv_class) {
2873 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2874 av_opt_set_defaults(s->priv_data);
2875 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2880 /* set muxer identification string */
2881 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2882 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2885 if(s->oformat->write_header){
2886 ret = s->oformat->write_header(s);
2891 /* init PTS generation */
2892 for(i=0;i<s->nb_streams;i++) {
2893 int64_t den = AV_NOPTS_VALUE;
2896 switch (st->codec->codec_type) {
2897 case AVMEDIA_TYPE_AUDIO:
2898 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2900 case AVMEDIA_TYPE_VIDEO:
2901 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2906 if (den != AV_NOPTS_VALUE) {
2908 ret = AVERROR_INVALIDDATA;
2911 frac_init(&st->pts, 0, 0, den);
2916 av_dict_free(options);
2925 //FIXME merge with compute_pkt_fields
2926 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2927 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2928 int num, den, frame_size, i;
2930 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2931 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2933 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2934 return AVERROR(EINVAL);*/
2936 /* duration field */
2937 if (pkt->duration == 0) {
2938 compute_frame_duration(&num, &den, st, NULL, pkt);
2940 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2944 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2947 //XXX/FIXME this is a temporary hack until all encoders output pts
2948 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2950 // pkt->pts= st->cur_dts;
2951 pkt->pts= st->pts.val;
2954 //calculate dts from pts
2955 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2956 st->pts_buffer[0]= pkt->pts;
2957 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2958 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2959 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2960 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2962 pkt->dts= st->pts_buffer[0];
2965 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2966 av_log(s, AV_LOG_ERROR,
2967 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2968 st->index, st->cur_dts, pkt->dts);
2969 return AVERROR(EINVAL);
2971 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2972 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2973 return AVERROR(EINVAL);
2976 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2977 st->cur_dts= pkt->dts;
2978 st->pts.val= pkt->dts;
2981 switch (st->codec->codec_type) {
2982 case AVMEDIA_TYPE_AUDIO:
2983 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
2985 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2986 likely equal to the encoder delay, but it would be better if we
2987 had the real timestamps from the encoder */
2988 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2989 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2992 case AVMEDIA_TYPE_VIDEO:
2993 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3001 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3006 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3007 return s->oformat->write_packet(s, pkt);
3011 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3013 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3016 ret= s->oformat->write_packet(s, pkt);
3019 s->streams[pkt->stream_index]->nb_frames++;
3023 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3024 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3026 AVPacketList **next_point, *this_pktl;
3028 this_pktl = av_mallocz(sizeof(AVPacketList));
3029 this_pktl->pkt= *pkt;
3030 pkt->destruct= NULL; // do not free original but only the copy
3031 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3033 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3034 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3036 next_point = &s->packet_buffer;
3039 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3040 while(!compare(s, &(*next_point)->pkt, pkt)){
3041 next_point= &(*next_point)->next;
3045 next_point = &(s->packet_buffer_end->next);
3048 assert(!*next_point);
3050 s->packet_buffer_end= this_pktl;
3053 this_pktl->next= *next_point;
3055 s->streams[pkt->stream_index]->last_in_packet_buffer=
3056 *next_point= this_pktl;
3059 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3061 AVStream *st = s->streams[ pkt ->stream_index];
3062 AVStream *st2= s->streams[ next->stream_index];
3063 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3067 return pkt->stream_index < next->stream_index;
3071 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3072 AVPacket *pkt, int flush)
3079 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3082 for(i=0; i < s->nb_streams; i++)
3083 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3085 if(stream_count && (s->nb_streams == stream_count || flush)){
3086 pktl= s->packet_buffer;
3089 s->packet_buffer= pktl->next;
3090 if(!s->packet_buffer)
3091 s->packet_buffer_end= NULL;
3093 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3094 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3098 av_init_packet(out);
3103 #if FF_API_INTERLEAVE_PACKET
3104 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3105 AVPacket *pkt, int flush)
3107 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3112 * Interleave an AVPacket correctly so it can be muxed.
3113 * @param out the interleaved packet will be output here
3114 * @param in the input packet
3115 * @param flush 1 if no further packets are available as input and all
3116 * remaining packets should be output
3117 * @return 1 if a packet was output, 0 if no packet could be output,
3118 * < 0 if an error occurred
3120 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3121 if (s->oformat->interleave_packet) {
3122 int ret = s->oformat->interleave_packet(s, out, in, flush);
3127 return ff_interleave_packet_per_dts(s, out, in, flush);
3130 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3131 AVStream *st= s->streams[ pkt->stream_index];
3134 //FIXME/XXX/HACK drop zero sized packets
3135 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3138 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3139 pkt->size, pkt->dts, pkt->pts);
3140 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3143 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3144 return AVERROR(EINVAL);
3148 int ret= interleave_packet(s, &opkt, pkt, 0);
3149 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3152 ret= s->oformat->write_packet(s, &opkt);
3154 s->streams[opkt.stream_index]->nb_frames++;
3156 av_free_packet(&opkt);
3164 int av_write_trailer(AVFormatContext *s)
3170 ret= interleave_packet(s, &pkt, NULL, 1);
3171 if(ret<0) //FIXME cleanup needed for ret<0 ?
3176 ret= s->oformat->write_packet(s, &pkt);
3178 s->streams[pkt.stream_index]->nb_frames++;
3180 av_free_packet(&pkt);
3186 if(s->oformat->write_trailer)
3187 ret = s->oformat->write_trailer(s);
3189 for(i=0;i<s->nb_streams;i++) {
3190 av_freep(&s->streams[i]->priv_data);
3191 av_freep(&s->streams[i]->index_entries);
3193 if (s->oformat->priv_class)
3194 av_opt_free(s->priv_data);
3195 av_freep(&s->priv_data);
3199 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3202 AVProgram *program=NULL;
3205 if (idx >= ac->nb_streams) {
3206 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3210 for(i=0; i<ac->nb_programs; i++){
3211 if(ac->programs[i]->id != progid)
3213 program = ac->programs[i];
3214 for(j=0; j<program->nb_stream_indexes; j++)
3215 if(program->stream_index[j] == idx)
3218 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3221 program->stream_index = tmp;
3222 program->stream_index[program->nb_stream_indexes++] = idx;
3227 static void print_fps(double d, const char *postfix){
3228 uint64_t v= lrintf(d*100);
3229 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3230 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3231 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3234 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3236 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3237 AVDictionaryEntry *tag=NULL;
3239 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3240 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3241 if(strcmp("language", tag->key))
3242 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3247 /* "user interface" functions */
3248 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3251 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3252 AVStream *st = ic->streams[i];
3253 int g = av_gcd(st->time_base.num, st->time_base.den);
3254 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3255 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3256 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3257 /* the pid is an important information, so we display it */
3258 /* XXX: add a generic system */
3259 if (flags & AVFMT_SHOW_IDS)
3260 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3262 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3263 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3264 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3265 if (st->sample_aspect_ratio.num && // default
3266 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3267 AVRational display_aspect_ratio;
3268 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3269 st->codec->width*st->sample_aspect_ratio.num,
3270 st->codec->height*st->sample_aspect_ratio.den,
3272 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3273 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3274 display_aspect_ratio.num, display_aspect_ratio.den);
3276 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3277 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3278 print_fps(av_q2d(st->avg_frame_rate), "fps");
3279 if(st->r_frame_rate.den && st->r_frame_rate.num)
3280 print_fps(av_q2d(st->r_frame_rate), "tbr");
3281 if(st->time_base.den && st->time_base.num)
3282 print_fps(1/av_q2d(st->time_base), "tbn");
3283 if(st->codec->time_base.den && st->codec->time_base.num)
3284 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3286 if (st->disposition & AV_DISPOSITION_DEFAULT)
3287 av_log(NULL, AV_LOG_INFO, " (default)");
3288 if (st->disposition & AV_DISPOSITION_DUB)
3289 av_log(NULL, AV_LOG_INFO, " (dub)");
3290 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3291 av_log(NULL, AV_LOG_INFO, " (original)");
3292 if (st->disposition & AV_DISPOSITION_COMMENT)
3293 av_log(NULL, AV_LOG_INFO, " (comment)");
3294 if (st->disposition & AV_DISPOSITION_LYRICS)
3295 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3296 if (st->disposition & AV_DISPOSITION_KARAOKE)
3297 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3298 if (st->disposition & AV_DISPOSITION_FORCED)
3299 av_log(NULL, AV_LOG_INFO, " (forced)");
3300 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3301 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3302 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3303 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3304 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3305 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3306 av_log(NULL, AV_LOG_INFO, "\n");
3307 dump_metadata(NULL, st->metadata, " ");
3310 void av_dump_format(AVFormatContext *ic,
3316 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3317 if (ic->nb_streams && !printed)
3320 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3321 is_output ? "Output" : "Input",
3323 is_output ? ic->oformat->name : ic->iformat->name,
3324 is_output ? "to" : "from", url);
3325 dump_metadata(NULL, ic->metadata, " ");
3327 av_log(NULL, AV_LOG_INFO, " Duration: ");
3328 if (ic->duration != AV_NOPTS_VALUE) {
3329 int hours, mins, secs, us;
3330 secs = ic->duration / AV_TIME_BASE;
3331 us = ic->duration % AV_TIME_BASE;
3336 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3337 (100 * us) / AV_TIME_BASE);
3339 av_log(NULL, AV_LOG_INFO, "N/A");
3341 if (ic->start_time != AV_NOPTS_VALUE) {
3343 av_log(NULL, AV_LOG_INFO, ", start: ");
3344 secs = ic->start_time / AV_TIME_BASE;
3345 us = abs(ic->start_time % AV_TIME_BASE);
3346 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3347 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3349 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3351 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3353 av_log(NULL, AV_LOG_INFO, "N/A");
3355 av_log(NULL, AV_LOG_INFO, "\n");
3357 for (i = 0; i < ic->nb_chapters; i++) {
3358 AVChapter *ch = ic->chapters[i];
3359 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3360 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3361 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3363 dump_metadata(NULL, ch->metadata, " ");
3365 if(ic->nb_programs) {
3366 int j, k, total = 0;
3367 for(j=0; j<ic->nb_programs; j++) {
3368 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3370 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3371 name ? name->value : "");
3372 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3373 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3374 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3375 printed[ic->programs[j]->stream_index[k]] = 1;
3377 total += ic->programs[j]->nb_stream_indexes;
3379 if (total < ic->nb_streams)
3380 av_log(NULL, AV_LOG_INFO, " No Program\n");
3382 for(i=0;i<ic->nb_streams;i++)
3384 dump_stream_format(ic, i, index, is_output);
3389 int64_t av_gettime(void)
3392 gettimeofday(&tv,NULL);
3393 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3396 uint64_t ff_ntp_time(void)
3398 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3401 int av_get_frame_filename(char *buf, int buf_size,
3402 const char *path, int number)
3405 char *q, buf1[20], c;
3406 int nd, len, percentd_found;
3418 while (isdigit(*p)) {
3419 nd = nd * 10 + *p++ - '0';
3422 } while (isdigit(c));
3431 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3433 if ((q - buf + len) > buf_size - 1)
3435 memcpy(q, buf1, len);
3443 if ((q - buf) < buf_size - 1)
3447 if (!percentd_found)
3456 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3460 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3462 for(i=0;i<size;i+=16) {
3469 PRINT(" %02x", buf[i+j]);
3474 for(j=0;j<len;j++) {
3476 if (c < ' ' || c > '~')
3485 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3487 hex_dump_internal(NULL, f, 0, buf, size);
3490 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3492 hex_dump_internal(avcl, NULL, level, buf, size);
3495 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3498 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3499 PRINT("stream #%d:\n", pkt->stream_index);
3500 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3501 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3502 /* DTS is _always_ valid after av_read_frame() */
3504 if (pkt->dts == AV_NOPTS_VALUE)
3507 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3508 /* PTS may not be known if B-frames are present. */
3510 if (pkt->pts == AV_NOPTS_VALUE)
3513 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3515 PRINT(" size=%d\n", pkt->size);
3518 av_hex_dump(f, pkt->data, pkt->size);
3521 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3523 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3526 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3529 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3532 void av_url_split(char *proto, int proto_size,
3533 char *authorization, int authorization_size,
3534 char *hostname, int hostname_size,
3536 char *path, int path_size,
3539 const char *p, *ls, *at, *col, *brk;
3541 if (port_ptr) *port_ptr = -1;
3542 if (proto_size > 0) proto[0] = 0;
3543 if (authorization_size > 0) authorization[0] = 0;
3544 if (hostname_size > 0) hostname[0] = 0;
3545 if (path_size > 0) path[0] = 0;
3547 /* parse protocol */
3548 if ((p = strchr(url, ':'))) {
3549 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3554 /* no protocol means plain filename */
3555 av_strlcpy(path, url, path_size);
3559 /* separate path from hostname */
3560 ls = strchr(p, '/');
3562 ls = strchr(p, '?');
3564 av_strlcpy(path, ls, path_size);
3566 ls = &p[strlen(p)]; // XXX
3568 /* the rest is hostname, use that to parse auth/port */
3570 /* authorization (user[:pass]@hostname) */
3571 if ((at = strchr(p, '@')) && at < ls) {
3572 av_strlcpy(authorization, p,
3573 FFMIN(authorization_size, at + 1 - p));
3574 p = at + 1; /* skip '@' */
3577 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3579 av_strlcpy(hostname, p + 1,
3580 FFMIN(hostname_size, brk - p));
3581 if (brk[1] == ':' && port_ptr)
3582 *port_ptr = atoi(brk + 2);
3583 } else if ((col = strchr(p, ':')) && col < ls) {
3584 av_strlcpy(hostname, p,
3585 FFMIN(col + 1 - p, hostname_size));
3586 if (port_ptr) *port_ptr = atoi(col + 1);
3588 av_strlcpy(hostname, p,
3589 FFMIN(ls + 1 - p, hostname_size));
3593 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3596 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3599 'C', 'D', 'E', 'F' };
3600 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3603 'c', 'd', 'e', 'f' };
3604 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3606 for(i = 0; i < s; i++) {
3607 buff[i * 2] = hex_table[src[i] >> 4];
3608 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3614 int ff_hex_to_data(uint8_t *data, const char *p)
3621 p += strspn(p, SPACE_CHARS);
3624 c = toupper((unsigned char) *p++);
3625 if (c >= '0' && c <= '9')
3627 else if (c >= 'A' && c <= 'F')
3642 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3643 unsigned int pts_num, unsigned int pts_den)
3646 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3647 if(new_tb.num != pts_num)
3648 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3650 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3652 if(new_tb.num <= 0 || new_tb.den <= 0) {
3653 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3656 s->time_base = new_tb;
3657 s->pts_wrap_bits = pts_wrap_bits;
3660 int ff_url_join(char *str, int size, const char *proto,
3661 const char *authorization, const char *hostname,
3662 int port, const char *fmt, ...)
3665 struct addrinfo hints, *ai;
3670 av_strlcatf(str, size, "%s://", proto);
3671 if (authorization && authorization[0])
3672 av_strlcatf(str, size, "%s@", authorization);
3673 #if CONFIG_NETWORK && defined(AF_INET6)
3674 /* Determine if hostname is a numerical IPv6 address,
3675 * properly escape it within [] in that case. */
3676 memset(&hints, 0, sizeof(hints));
3677 hints.ai_flags = AI_NUMERICHOST;
3678 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3679 if (ai->ai_family == AF_INET6) {
3680 av_strlcat(str, "[", size);
3681 av_strlcat(str, hostname, size);
3682 av_strlcat(str, "]", size);
3684 av_strlcat(str, hostname, size);
3689 /* Not an IPv6 address, just output the plain string. */
3690 av_strlcat(str, hostname, size);
3693 av_strlcatf(str, size, ":%d", port);
3696 int len = strlen(str);
3699 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3705 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3706 AVFormatContext *src)
3711 local_pkt.stream_index = dst_stream;
3712 if (pkt->pts != AV_NOPTS_VALUE)
3713 local_pkt.pts = av_rescale_q(pkt->pts,
3714 src->streams[pkt->stream_index]->time_base,
3715 dst->streams[dst_stream]->time_base);
3716 if (pkt->dts != AV_NOPTS_VALUE)
3717 local_pkt.dts = av_rescale_q(pkt->dts,
3718 src->streams[pkt->stream_index]->time_base,
3719 dst->streams[dst_stream]->time_base);
3720 return av_write_frame(dst, &local_pkt);
3723 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3726 const char *ptr = str;
3728 /* Parse key=value pairs. */
3731 char *dest = NULL, *dest_end;
3732 int key_len, dest_len = 0;
3734 /* Skip whitespace and potential commas. */
3735 while (*ptr && (isspace(*ptr) || *ptr == ','))
3742 if (!(ptr = strchr(key, '=')))
3745 key_len = ptr - key;
3747 callback_get_buf(context, key, key_len, &dest, &dest_len);
3748 dest_end = dest + dest_len - 1;
3752 while (*ptr && *ptr != '\"') {
3756 if (dest && dest < dest_end)
3760 if (dest && dest < dest_end)
3768 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3769 if (dest && dest < dest_end)
3777 int ff_find_stream_index(AVFormatContext *s, int id)
3780 for (i = 0; i < s->nb_streams; i++) {
3781 if (s->streams[i]->id == id)
3787 void ff_make_absolute_url(char *buf, int size, const char *base,
3791 /* Absolute path, relative to the current server */
3792 if (base && strstr(base, "://") && rel[0] == '/') {
3794 av_strlcpy(buf, base, size);
3795 sep = strstr(buf, "://");
3798 sep = strchr(sep, '/');
3802 av_strlcat(buf, rel, size);
3805 /* If rel actually is an absolute url, just copy it */
3806 if (!base || strstr(rel, "://") || rel[0] == '/') {
3807 av_strlcpy(buf, rel, size);
3811 av_strlcpy(buf, base, size);
3812 /* Remove the file name from the base url */
3813 sep = strrchr(buf, '/');
3818 while (av_strstart(rel, "../", NULL) && sep) {
3819 /* Remove the path delimiter at the end */
3821 sep = strrchr(buf, '/');
3822 /* If the next directory name to pop off is "..", break here */
3823 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3824 /* Readd the slash we just removed */
3825 av_strlcat(buf, "/", size);
3828 /* Cut off the directory name */
3835 av_strlcat(buf, rel, size);
3838 int64_t ff_iso8601_to_unix_time(const char *datestr)
3841 struct tm time1 = {0}, time2 = {0};
3843 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3844 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3846 return av_timegm(&time2);
3848 return av_timegm(&time1);
3850 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3851 "the date string.\n");
3856 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3859 if (ofmt->query_codec)
3860 return ofmt->query_codec(codec_id, std_compliance);
3861 else if (ofmt->codec_tag)
3862 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3863 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3864 codec_id == ofmt->subtitle_codec)
3867 return AVERROR_PATCHWELCOME;
3870 int avformat_network_init(void)
3874 ff_network_inited_globally = 1;
3875 if ((ret = ff_network_init()) < 0)
3882 int avformat_network_deinit(void)
3891 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3892 uint64_t channel_layout, int32_t sample_rate,
3893 int32_t width, int32_t height)
3899 return AVERROR(EINVAL);
3902 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3904 if (channel_layout) {
3906 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3910 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3912 if (width || height) {
3914 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3916 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3918 return AVERROR(ENOMEM);
3919 bytestream_put_le32(&data, flags);
3921 bytestream_put_le32(&data, channels);
3923 bytestream_put_le64(&data, channel_layout);
3925 bytestream_put_le32(&data, sample_rate);
3926 if (width || height) {
3927 bytestream_put_le32(&data, width);
3928 bytestream_put_le32(&data, height);
3933 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3935 return ff_codec_bmp_tags;
3937 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3939 return ff_codec_wav_tags;