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 &&
2310 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2311 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2314 if (i == ic->nb_streams) {
2315 /* NOTE: if the format has no header, then we need to read
2316 some packets to get most of the streams, so we cannot
2318 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2319 /* if we found the info for all the codecs, we can stop */
2321 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2325 /* we did not get all the codec info, but we read too much data */
2326 if (read_size >= ic->probesize) {
2328 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2332 /* NOTE: a new stream can be added there if no header in file
2333 (AVFMTCTX_NOHEADER) */
2334 ret = read_frame_internal(ic, &pkt1);
2335 if (ret == AVERROR(EAGAIN))
2340 AVPacket empty_pkt = { 0 };
2342 av_init_packet(&empty_pkt);
2344 ret = -1; /* we could not have all the codec parameters before EOF */
2345 for(i=0;i<ic->nb_streams;i++) {
2346 st = ic->streams[i];
2348 /* flush the decoders */
2349 if (st->info->found_decoder == 1) {
2351 err = try_decode_frame(st, &empty_pkt,
2352 (options && i < orig_nb_streams) ?
2353 &options[i] : NULL);
2354 } while (err > 0 && !has_codec_parameters(st));
2358 av_log(ic, AV_LOG_WARNING,
2359 "decoding for stream %d failed\n", st->index);
2360 } else if (!has_codec_parameters(st)) {
2362 avcodec_string(buf, sizeof(buf), st->codec, 0);
2363 av_log(ic, AV_LOG_WARNING,
2364 "Could not find codec parameters (%s)\n", buf);
2372 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2373 if ((ret = av_dup_packet(pkt)) < 0)
2374 goto find_stream_info_err;
2376 read_size += pkt->size;
2378 st = ic->streams[pkt->stream_index];
2379 if (st->codec_info_nb_frames>1) {
2380 if (av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2381 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2384 st->info->codec_info_duration += pkt->duration;
2387 int64_t last = st->info->last_dts;
2389 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2390 int64_t duration= pkt->dts - last;
2391 double dur= duration * av_q2d(st->time_base);
2393 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2394 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2395 if (st->info->duration_count < 2)
2396 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2397 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2398 int framerate= get_std_framerate(i);
2399 int ticks= lrintf(dur*framerate/(1001*12));
2400 double error = dur - (double)ticks*1001*12 / framerate;
2401 st->info->duration_error[i] += error*error;
2403 st->info->duration_count++;
2404 // ignore the first 4 values, they might have some random jitter
2405 if (st->info->duration_count > 3)
2406 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2408 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2409 st->info->last_dts = pkt->dts;
2411 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2412 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2413 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2414 st->codec->extradata_size= i;
2415 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2416 if (!st->codec->extradata)
2417 return AVERROR(ENOMEM);
2418 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2419 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2423 /* if still no information, we try to open the codec and to
2424 decompress the frame. We try to avoid that in most cases as
2425 it takes longer and uses more memory. For MPEG-4, we need to
2426 decompress for QuickTime.
2428 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2429 least one frame of codec data, this makes sure the codec initializes
2430 the channel configuration and does not only trust the values from the container.
2432 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2434 st->codec_info_nb_frames++;
2438 // close codecs which were opened in try_decode_frame()
2439 for(i=0;i<ic->nb_streams;i++) {
2440 st = ic->streams[i];
2441 avcodec_close(st->codec);
2443 for(i=0;i<ic->nb_streams;i++) {
2444 st = ic->streams[i];
2445 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2446 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2447 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2448 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2449 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2450 // the check for tb_unreliable() is not completely correct, since this is not about handling
2451 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2452 // ipmovie.c produces.
2453 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2454 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);
2455 if (st->info->duration_count && !st->r_frame_rate.num
2456 && tb_unreliable(st->codec) /*&&
2457 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2458 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2460 double best_error= 2*av_q2d(st->time_base);
2461 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2463 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2464 double error = st->info->duration_error[j] * get_std_framerate(j);
2465 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2466 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2467 if(error < best_error){
2469 num = get_std_framerate(j);
2472 // do not increase frame rate by more than 1 % in order to match a standard rate.
2473 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2474 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2476 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2477 if(!st->codec->bits_per_coded_sample)
2478 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2479 // set stream disposition based on audio service type
2480 switch (st->codec->audio_service_type) {
2481 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2482 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2483 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2484 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2485 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2486 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2487 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2488 st->disposition = AV_DISPOSITION_COMMENT; break;
2489 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2490 st->disposition = AV_DISPOSITION_KARAOKE; break;
2495 estimate_timings(ic, old_offset);
2497 compute_chapters_end(ic);
2499 find_stream_info_err:
2500 for (i=0; i < ic->nb_streams; i++) {
2501 if (ic->streams[i]->codec)
2502 ic->streams[i]->codec->thread_count = 0;
2503 av_freep(&ic->streams[i]->info);
2508 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2512 for (i = 0; i < ic->nb_programs; i++)
2513 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2514 if (ic->programs[i]->stream_index[j] == s)
2515 return ic->programs[i];
2519 int av_find_best_stream(AVFormatContext *ic,
2520 enum AVMediaType type,
2521 int wanted_stream_nb,
2523 AVCodec **decoder_ret,
2526 int i, nb_streams = ic->nb_streams;
2527 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2528 unsigned *program = NULL;
2529 AVCodec *decoder = NULL, *best_decoder = NULL;
2531 if (related_stream >= 0 && wanted_stream_nb < 0) {
2532 AVProgram *p = find_program_from_stream(ic, related_stream);
2534 program = p->stream_index;
2535 nb_streams = p->nb_stream_indexes;
2538 for (i = 0; i < nb_streams; i++) {
2539 int real_stream_index = program ? program[i] : i;
2540 AVStream *st = ic->streams[real_stream_index];
2541 AVCodecContext *avctx = st->codec;
2542 if (avctx->codec_type != type)
2544 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2546 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2549 decoder = avcodec_find_decoder(st->codec->codec_id);
2552 ret = AVERROR_DECODER_NOT_FOUND;
2556 if (best_count >= st->codec_info_nb_frames)
2558 best_count = st->codec_info_nb_frames;
2559 ret = real_stream_index;
2560 best_decoder = decoder;
2561 if (program && i == nb_streams - 1 && ret < 0) {
2563 nb_streams = ic->nb_streams;
2564 i = 0; /* no related stream found, try again with everything */
2568 *decoder_ret = best_decoder;
2572 /*******************************************************/
2574 int av_read_play(AVFormatContext *s)
2576 if (s->iformat->read_play)
2577 return s->iformat->read_play(s);
2579 return avio_pause(s->pb, 0);
2580 return AVERROR(ENOSYS);
2583 int av_read_pause(AVFormatContext *s)
2585 if (s->iformat->read_pause)
2586 return s->iformat->read_pause(s);
2588 return avio_pause(s->pb, 1);
2589 return AVERROR(ENOSYS);
2592 void avformat_free_context(AVFormatContext *s)
2598 if (s->iformat && s->iformat->priv_class && s->priv_data)
2599 av_opt_free(s->priv_data);
2601 for(i=0;i<s->nb_streams;i++) {
2602 /* free all data in a stream component */
2605 av_parser_close(st->parser);
2607 if (st->attached_pic.data)
2608 av_free_packet(&st->attached_pic);
2609 av_dict_free(&st->metadata);
2610 av_free(st->index_entries);
2611 av_free(st->codec->extradata);
2612 av_free(st->codec->subtitle_header);
2614 av_free(st->priv_data);
2618 for(i=s->nb_programs-1; i>=0; i--) {
2619 av_dict_free(&s->programs[i]->metadata);
2620 av_freep(&s->programs[i]->stream_index);
2621 av_freep(&s->programs[i]);
2623 av_freep(&s->programs);
2624 av_freep(&s->priv_data);
2625 while(s->nb_chapters--) {
2626 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2627 av_free(s->chapters[s->nb_chapters]);
2629 av_freep(&s->chapters);
2630 av_dict_free(&s->metadata);
2631 av_freep(&s->streams);
2635 #if FF_API_CLOSE_INPUT_FILE
2636 void av_close_input_file(AVFormatContext *s)
2638 avformat_close_input(&s);
2642 void avformat_close_input(AVFormatContext **ps)
2644 AVFormatContext *s = *ps;
2645 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2647 flush_packet_queue(s);
2648 if (s->iformat->read_close)
2649 s->iformat->read_close(s);
2650 avformat_free_context(s);
2656 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2662 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2664 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2667 s->streams = streams;
2669 st = av_mallocz(sizeof(AVStream));
2672 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2677 st->codec = avcodec_alloc_context3(c);
2679 /* no default bitrate if decoding */
2680 st->codec->bit_rate = 0;
2682 st->index = s->nb_streams;
2683 st->start_time = AV_NOPTS_VALUE;
2684 st->duration = AV_NOPTS_VALUE;
2685 /* we set the current DTS to 0 so that formats without any timestamps
2686 but durations get some timestamps, formats with some unknown
2687 timestamps have their first few packets buffered and the
2688 timestamps corrected before they are returned to the user */
2690 st->first_dts = AV_NOPTS_VALUE;
2691 st->probe_packets = MAX_PROBE_PACKETS;
2693 /* default pts setting is MPEG-like */
2694 avpriv_set_pts_info(st, 33, 1, 90000);
2695 st->last_IP_pts = AV_NOPTS_VALUE;
2696 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2697 st->pts_buffer[i]= AV_NOPTS_VALUE;
2698 st->reference_dts = AV_NOPTS_VALUE;
2700 st->sample_aspect_ratio = (AVRational){0,1};
2702 s->streams[s->nb_streams++] = st;
2706 AVProgram *av_new_program(AVFormatContext *ac, int id)
2708 AVProgram *program=NULL;
2711 av_dlog(ac, "new_program: id=0x%04x\n", id);
2713 for(i=0; i<ac->nb_programs; i++)
2714 if(ac->programs[i]->id == id)
2715 program = ac->programs[i];
2718 program = av_mallocz(sizeof(AVProgram));
2721 dynarray_add(&ac->programs, &ac->nb_programs, program);
2722 program->discard = AVDISCARD_NONE;
2729 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2731 AVChapter *chapter = NULL;
2734 for(i=0; i<s->nb_chapters; i++)
2735 if(s->chapters[i]->id == id)
2736 chapter = s->chapters[i];
2739 chapter= av_mallocz(sizeof(AVChapter));
2742 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2744 av_dict_set(&chapter->metadata, "title", title, 0);
2746 chapter->time_base= time_base;
2747 chapter->start = start;
2753 /************************************************************/
2754 /* output media file */
2756 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2758 const AVCodecTag *avctag;
2760 enum CodecID id = CODEC_ID_NONE;
2761 unsigned int tag = 0;
2764 * Check that tag + id is in the table
2765 * If neither is in the table -> OK
2766 * If tag is in the table with another id -> FAIL
2767 * If id is in the table with another tag -> FAIL unless strict < normal
2769 for (n = 0; s->oformat->codec_tag[n]; n++) {
2770 avctag = s->oformat->codec_tag[n];
2771 while (avctag->id != CODEC_ID_NONE) {
2772 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2774 if (id == st->codec->codec_id)
2777 if (avctag->id == st->codec->codec_id)
2782 if (id != CODEC_ID_NONE)
2784 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2789 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2793 AVDictionary *tmp = NULL;
2796 av_dict_copy(&tmp, *options, 0);
2797 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2800 // some sanity checks
2801 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2802 av_log(s, AV_LOG_ERROR, "no streams\n");
2803 ret = AVERROR(EINVAL);
2807 for(i=0;i<s->nb_streams;i++) {
2810 switch (st->codec->codec_type) {
2811 case AVMEDIA_TYPE_AUDIO:
2812 if(st->codec->sample_rate<=0){
2813 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2814 ret = AVERROR(EINVAL);
2817 if(!st->codec->block_align)
2818 st->codec->block_align = st->codec->channels *
2819 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2821 case AVMEDIA_TYPE_VIDEO:
2822 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2823 av_log(s, AV_LOG_ERROR, "time base not set\n");
2824 ret = AVERROR(EINVAL);
2827 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2828 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2829 ret = AVERROR(EINVAL);
2832 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2833 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2834 "(%d/%d) and encoder layer (%d/%d)\n",
2835 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2836 st->codec->sample_aspect_ratio.num,
2837 st->codec->sample_aspect_ratio.den);
2838 ret = AVERROR(EINVAL);
2844 if(s->oformat->codec_tag){
2845 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)){
2846 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2847 st->codec->codec_tag= 0;
2849 if(st->codec->codec_tag){
2850 if (!validate_codec_tag(s, st)) {
2852 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2853 av_log(s, AV_LOG_ERROR,
2854 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2855 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2856 ret = AVERROR_INVALIDDATA;
2860 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2863 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2864 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2865 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2868 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2869 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2870 if (!s->priv_data) {
2871 ret = AVERROR(ENOMEM);
2874 if (s->oformat->priv_class) {
2875 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2876 av_opt_set_defaults(s->priv_data);
2877 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2882 /* set muxer identification string */
2883 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2884 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2887 if(s->oformat->write_header){
2888 ret = s->oformat->write_header(s);
2893 /* init PTS generation */
2894 for(i=0;i<s->nb_streams;i++) {
2895 int64_t den = AV_NOPTS_VALUE;
2898 switch (st->codec->codec_type) {
2899 case AVMEDIA_TYPE_AUDIO:
2900 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2902 case AVMEDIA_TYPE_VIDEO:
2903 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2908 if (den != AV_NOPTS_VALUE) {
2910 ret = AVERROR_INVALIDDATA;
2913 frac_init(&st->pts, 0, 0, den);
2918 av_dict_free(options);
2927 //FIXME merge with compute_pkt_fields
2928 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2929 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2930 int num, den, frame_size, i;
2932 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2933 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2935 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2936 return AVERROR(EINVAL);*/
2938 /* duration field */
2939 if (pkt->duration == 0) {
2940 compute_frame_duration(&num, &den, st, NULL, pkt);
2942 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2946 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2949 //XXX/FIXME this is a temporary hack until all encoders output pts
2950 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2952 // pkt->pts= st->cur_dts;
2953 pkt->pts= st->pts.val;
2956 //calculate dts from pts
2957 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2958 st->pts_buffer[0]= pkt->pts;
2959 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2960 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2961 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2962 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2964 pkt->dts= st->pts_buffer[0];
2967 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2968 av_log(s, AV_LOG_ERROR,
2969 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2970 st->index, st->cur_dts, pkt->dts);
2971 return AVERROR(EINVAL);
2973 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2974 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2975 return AVERROR(EINVAL);
2978 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2979 st->cur_dts= pkt->dts;
2980 st->pts.val= pkt->dts;
2983 switch (st->codec->codec_type) {
2984 case AVMEDIA_TYPE_AUDIO:
2985 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
2987 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2988 likely equal to the encoder delay, but it would be better if we
2989 had the real timestamps from the encoder */
2990 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2991 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2994 case AVMEDIA_TYPE_VIDEO:
2995 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3003 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3008 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3009 return s->oformat->write_packet(s, pkt);
3013 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3015 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3018 ret= s->oformat->write_packet(s, pkt);
3021 s->streams[pkt->stream_index]->nb_frames++;
3025 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3026 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3028 AVPacketList **next_point, *this_pktl;
3030 this_pktl = av_mallocz(sizeof(AVPacketList));
3031 this_pktl->pkt= *pkt;
3032 pkt->destruct= NULL; // do not free original but only the copy
3033 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3035 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3036 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3038 next_point = &s->packet_buffer;
3041 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3042 while(!compare(s, &(*next_point)->pkt, pkt)){
3043 next_point= &(*next_point)->next;
3047 next_point = &(s->packet_buffer_end->next);
3050 assert(!*next_point);
3052 s->packet_buffer_end= this_pktl;
3055 this_pktl->next= *next_point;
3057 s->streams[pkt->stream_index]->last_in_packet_buffer=
3058 *next_point= this_pktl;
3061 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3063 AVStream *st = s->streams[ pkt ->stream_index];
3064 AVStream *st2= s->streams[ next->stream_index];
3065 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3069 return pkt->stream_index < next->stream_index;
3073 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3074 AVPacket *pkt, int flush)
3081 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3084 for(i=0; i < s->nb_streams; i++)
3085 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3087 if(stream_count && (s->nb_streams == stream_count || flush)){
3088 pktl= s->packet_buffer;
3091 s->packet_buffer= pktl->next;
3092 if(!s->packet_buffer)
3093 s->packet_buffer_end= NULL;
3095 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3096 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3100 av_init_packet(out);
3105 #if FF_API_INTERLEAVE_PACKET
3106 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3107 AVPacket *pkt, int flush)
3109 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3114 * Interleave an AVPacket correctly so it can be muxed.
3115 * @param out the interleaved packet will be output here
3116 * @param in the input packet
3117 * @param flush 1 if no further packets are available as input and all
3118 * remaining packets should be output
3119 * @return 1 if a packet was output, 0 if no packet could be output,
3120 * < 0 if an error occurred
3122 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3123 if (s->oformat->interleave_packet) {
3124 int ret = s->oformat->interleave_packet(s, out, in, flush);
3129 return ff_interleave_packet_per_dts(s, out, in, flush);
3132 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3136 AVStream *st= s->streams[ pkt->stream_index];
3138 //FIXME/XXX/HACK drop zero sized packets
3139 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3142 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3143 pkt->size, pkt->dts, pkt->pts);
3144 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3147 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3148 return AVERROR(EINVAL);
3150 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3156 int ret= interleave_packet(s, &opkt, pkt, flush);
3157 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3160 ret= s->oformat->write_packet(s, &opkt);
3162 s->streams[opkt.stream_index]->nb_frames++;
3164 av_free_packet(&opkt);
3172 int av_write_trailer(AVFormatContext *s)
3178 ret= interleave_packet(s, &pkt, NULL, 1);
3179 if(ret<0) //FIXME cleanup needed for ret<0 ?
3184 ret= s->oformat->write_packet(s, &pkt);
3186 s->streams[pkt.stream_index]->nb_frames++;
3188 av_free_packet(&pkt);
3194 if(s->oformat->write_trailer)
3195 ret = s->oformat->write_trailer(s);
3197 for(i=0;i<s->nb_streams;i++) {
3198 av_freep(&s->streams[i]->priv_data);
3199 av_freep(&s->streams[i]->index_entries);
3201 if (s->oformat->priv_class)
3202 av_opt_free(s->priv_data);
3203 av_freep(&s->priv_data);
3207 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3210 AVProgram *program=NULL;
3213 if (idx >= ac->nb_streams) {
3214 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3218 for(i=0; i<ac->nb_programs; i++){
3219 if(ac->programs[i]->id != progid)
3221 program = ac->programs[i];
3222 for(j=0; j<program->nb_stream_indexes; j++)
3223 if(program->stream_index[j] == idx)
3226 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3229 program->stream_index = tmp;
3230 program->stream_index[program->nb_stream_indexes++] = idx;
3235 static void print_fps(double d, const char *postfix){
3236 uint64_t v= lrintf(d*100);
3237 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3238 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3239 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3242 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3244 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3245 AVDictionaryEntry *tag=NULL;
3247 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3248 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3249 if(strcmp("language", tag->key))
3250 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3255 /* "user interface" functions */
3256 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3259 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3260 AVStream *st = ic->streams[i];
3261 int g = av_gcd(st->time_base.num, st->time_base.den);
3262 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3263 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3264 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3265 /* the pid is an important information, so we display it */
3266 /* XXX: add a generic system */
3267 if (flags & AVFMT_SHOW_IDS)
3268 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3270 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3271 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3272 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3273 if (st->sample_aspect_ratio.num && // default
3274 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3275 AVRational display_aspect_ratio;
3276 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3277 st->codec->width*st->sample_aspect_ratio.num,
3278 st->codec->height*st->sample_aspect_ratio.den,
3280 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3281 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3282 display_aspect_ratio.num, display_aspect_ratio.den);
3284 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3285 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3286 print_fps(av_q2d(st->avg_frame_rate), "fps");
3287 if(st->r_frame_rate.den && st->r_frame_rate.num)
3288 print_fps(av_q2d(st->r_frame_rate), "tbr");
3289 if(st->time_base.den && st->time_base.num)
3290 print_fps(1/av_q2d(st->time_base), "tbn");
3291 if(st->codec->time_base.den && st->codec->time_base.num)
3292 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3294 if (st->disposition & AV_DISPOSITION_DEFAULT)
3295 av_log(NULL, AV_LOG_INFO, " (default)");
3296 if (st->disposition & AV_DISPOSITION_DUB)
3297 av_log(NULL, AV_LOG_INFO, " (dub)");
3298 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3299 av_log(NULL, AV_LOG_INFO, " (original)");
3300 if (st->disposition & AV_DISPOSITION_COMMENT)
3301 av_log(NULL, AV_LOG_INFO, " (comment)");
3302 if (st->disposition & AV_DISPOSITION_LYRICS)
3303 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3304 if (st->disposition & AV_DISPOSITION_KARAOKE)
3305 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3306 if (st->disposition & AV_DISPOSITION_FORCED)
3307 av_log(NULL, AV_LOG_INFO, " (forced)");
3308 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3309 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3310 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3311 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3312 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3313 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3314 av_log(NULL, AV_LOG_INFO, "\n");
3315 dump_metadata(NULL, st->metadata, " ");
3318 void av_dump_format(AVFormatContext *ic,
3324 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3325 if (ic->nb_streams && !printed)
3328 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3329 is_output ? "Output" : "Input",
3331 is_output ? ic->oformat->name : ic->iformat->name,
3332 is_output ? "to" : "from", url);
3333 dump_metadata(NULL, ic->metadata, " ");
3335 av_log(NULL, AV_LOG_INFO, " Duration: ");
3336 if (ic->duration != AV_NOPTS_VALUE) {
3337 int hours, mins, secs, us;
3338 secs = ic->duration / AV_TIME_BASE;
3339 us = ic->duration % AV_TIME_BASE;
3344 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3345 (100 * us) / AV_TIME_BASE);
3347 av_log(NULL, AV_LOG_INFO, "N/A");
3349 if (ic->start_time != AV_NOPTS_VALUE) {
3351 av_log(NULL, AV_LOG_INFO, ", start: ");
3352 secs = ic->start_time / AV_TIME_BASE;
3353 us = abs(ic->start_time % AV_TIME_BASE);
3354 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3355 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3357 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3359 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3361 av_log(NULL, AV_LOG_INFO, "N/A");
3363 av_log(NULL, AV_LOG_INFO, "\n");
3365 for (i = 0; i < ic->nb_chapters; i++) {
3366 AVChapter *ch = ic->chapters[i];
3367 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3368 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3369 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3371 dump_metadata(NULL, ch->metadata, " ");
3373 if(ic->nb_programs) {
3374 int j, k, total = 0;
3375 for(j=0; j<ic->nb_programs; j++) {
3376 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3378 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3379 name ? name->value : "");
3380 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3381 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3382 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3383 printed[ic->programs[j]->stream_index[k]] = 1;
3385 total += ic->programs[j]->nb_stream_indexes;
3387 if (total < ic->nb_streams)
3388 av_log(NULL, AV_LOG_INFO, " No Program\n");
3390 for(i=0;i<ic->nb_streams;i++)
3392 dump_stream_format(ic, i, index, is_output);
3397 int64_t av_gettime(void)
3400 gettimeofday(&tv,NULL);
3401 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3404 uint64_t ff_ntp_time(void)
3406 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3409 int av_get_frame_filename(char *buf, int buf_size,
3410 const char *path, int number)
3413 char *q, buf1[20], c;
3414 int nd, len, percentd_found;
3426 while (isdigit(*p)) {
3427 nd = nd * 10 + *p++ - '0';
3430 } while (isdigit(c));
3439 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3441 if ((q - buf + len) > buf_size - 1)
3443 memcpy(q, buf1, len);
3451 if ((q - buf) < buf_size - 1)
3455 if (!percentd_found)
3464 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3468 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3470 for(i=0;i<size;i+=16) {
3477 PRINT(" %02x", buf[i+j]);
3482 for(j=0;j<len;j++) {
3484 if (c < ' ' || c > '~')
3493 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3495 hex_dump_internal(NULL, f, 0, buf, size);
3498 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3500 hex_dump_internal(avcl, NULL, level, buf, size);
3503 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3506 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3507 PRINT("stream #%d:\n", pkt->stream_index);
3508 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3509 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3510 /* DTS is _always_ valid after av_read_frame() */
3512 if (pkt->dts == AV_NOPTS_VALUE)
3515 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3516 /* PTS may not be known if B-frames are present. */
3518 if (pkt->pts == AV_NOPTS_VALUE)
3521 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3523 PRINT(" size=%d\n", pkt->size);
3526 av_hex_dump(f, pkt->data, pkt->size);
3529 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3531 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3534 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3537 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3540 void av_url_split(char *proto, int proto_size,
3541 char *authorization, int authorization_size,
3542 char *hostname, int hostname_size,
3544 char *path, int path_size,
3547 const char *p, *ls, *at, *col, *brk;
3549 if (port_ptr) *port_ptr = -1;
3550 if (proto_size > 0) proto[0] = 0;
3551 if (authorization_size > 0) authorization[0] = 0;
3552 if (hostname_size > 0) hostname[0] = 0;
3553 if (path_size > 0) path[0] = 0;
3555 /* parse protocol */
3556 if ((p = strchr(url, ':'))) {
3557 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3562 /* no protocol means plain filename */
3563 av_strlcpy(path, url, path_size);
3567 /* separate path from hostname */
3568 ls = strchr(p, '/');
3570 ls = strchr(p, '?');
3572 av_strlcpy(path, ls, path_size);
3574 ls = &p[strlen(p)]; // XXX
3576 /* the rest is hostname, use that to parse auth/port */
3578 /* authorization (user[:pass]@hostname) */
3579 if ((at = strchr(p, '@')) && at < ls) {
3580 av_strlcpy(authorization, p,
3581 FFMIN(authorization_size, at + 1 - p));
3582 p = at + 1; /* skip '@' */
3585 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3587 av_strlcpy(hostname, p + 1,
3588 FFMIN(hostname_size, brk - p));
3589 if (brk[1] == ':' && port_ptr)
3590 *port_ptr = atoi(brk + 2);
3591 } else if ((col = strchr(p, ':')) && col < ls) {
3592 av_strlcpy(hostname, p,
3593 FFMIN(col + 1 - p, hostname_size));
3594 if (port_ptr) *port_ptr = atoi(col + 1);
3596 av_strlcpy(hostname, p,
3597 FFMIN(ls + 1 - p, hostname_size));
3601 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3604 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3607 'C', 'D', 'E', 'F' };
3608 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3611 'c', 'd', 'e', 'f' };
3612 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3614 for(i = 0; i < s; i++) {
3615 buff[i * 2] = hex_table[src[i] >> 4];
3616 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3622 int ff_hex_to_data(uint8_t *data, const char *p)
3629 p += strspn(p, SPACE_CHARS);
3632 c = toupper((unsigned char) *p++);
3633 if (c >= '0' && c <= '9')
3635 else if (c >= 'A' && c <= 'F')
3650 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3651 unsigned int pts_num, unsigned int pts_den)
3654 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3655 if(new_tb.num != pts_num)
3656 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3658 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3660 if(new_tb.num <= 0 || new_tb.den <= 0) {
3661 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3664 s->time_base = new_tb;
3665 s->pts_wrap_bits = pts_wrap_bits;
3668 int ff_url_join(char *str, int size, const char *proto,
3669 const char *authorization, const char *hostname,
3670 int port, const char *fmt, ...)
3673 struct addrinfo hints = { 0 }, *ai;
3678 av_strlcatf(str, size, "%s://", proto);
3679 if (authorization && authorization[0])
3680 av_strlcatf(str, size, "%s@", authorization);
3681 #if CONFIG_NETWORK && defined(AF_INET6)
3682 /* Determine if hostname is a numerical IPv6 address,
3683 * properly escape it within [] in that case. */
3684 hints.ai_flags = AI_NUMERICHOST;
3685 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3686 if (ai->ai_family == AF_INET6) {
3687 av_strlcat(str, "[", size);
3688 av_strlcat(str, hostname, size);
3689 av_strlcat(str, "]", size);
3691 av_strlcat(str, hostname, size);
3696 /* Not an IPv6 address, just output the plain string. */
3697 av_strlcat(str, hostname, size);
3700 av_strlcatf(str, size, ":%d", port);
3703 int len = strlen(str);
3706 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3712 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3713 AVFormatContext *src)
3718 local_pkt.stream_index = dst_stream;
3719 if (pkt->pts != AV_NOPTS_VALUE)
3720 local_pkt.pts = av_rescale_q(pkt->pts,
3721 src->streams[pkt->stream_index]->time_base,
3722 dst->streams[dst_stream]->time_base);
3723 if (pkt->dts != AV_NOPTS_VALUE)
3724 local_pkt.dts = av_rescale_q(pkt->dts,
3725 src->streams[pkt->stream_index]->time_base,
3726 dst->streams[dst_stream]->time_base);
3727 return av_write_frame(dst, &local_pkt);
3730 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3733 const char *ptr = str;
3735 /* Parse key=value pairs. */
3738 char *dest = NULL, *dest_end;
3739 int key_len, dest_len = 0;
3741 /* Skip whitespace and potential commas. */
3742 while (*ptr && (isspace(*ptr) || *ptr == ','))
3749 if (!(ptr = strchr(key, '=')))
3752 key_len = ptr - key;
3754 callback_get_buf(context, key, key_len, &dest, &dest_len);
3755 dest_end = dest + dest_len - 1;
3759 while (*ptr && *ptr != '\"') {
3763 if (dest && dest < dest_end)
3767 if (dest && dest < dest_end)
3775 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3776 if (dest && dest < dest_end)
3784 int ff_find_stream_index(AVFormatContext *s, int id)
3787 for (i = 0; i < s->nb_streams; i++) {
3788 if (s->streams[i]->id == id)
3794 void ff_make_absolute_url(char *buf, int size, const char *base,
3798 /* Absolute path, relative to the current server */
3799 if (base && strstr(base, "://") && rel[0] == '/') {
3801 av_strlcpy(buf, base, size);
3802 sep = strstr(buf, "://");
3805 sep = strchr(sep, '/');
3809 av_strlcat(buf, rel, size);
3812 /* If rel actually is an absolute url, just copy it */
3813 if (!base || strstr(rel, "://") || rel[0] == '/') {
3814 av_strlcpy(buf, rel, size);
3818 av_strlcpy(buf, base, size);
3819 /* Remove the file name from the base url */
3820 sep = strrchr(buf, '/');
3825 while (av_strstart(rel, "../", NULL) && sep) {
3826 /* Remove the path delimiter at the end */
3828 sep = strrchr(buf, '/');
3829 /* If the next directory name to pop off is "..", break here */
3830 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3831 /* Readd the slash we just removed */
3832 av_strlcat(buf, "/", size);
3835 /* Cut off the directory name */
3842 av_strlcat(buf, rel, size);
3845 int64_t ff_iso8601_to_unix_time(const char *datestr)
3848 struct tm time1 = {0}, time2 = {0};
3850 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3851 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3853 return av_timegm(&time2);
3855 return av_timegm(&time1);
3857 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3858 "the date string.\n");
3863 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3866 if (ofmt->query_codec)
3867 return ofmt->query_codec(codec_id, std_compliance);
3868 else if (ofmt->codec_tag)
3869 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3870 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3871 codec_id == ofmt->subtitle_codec)
3874 return AVERROR_PATCHWELCOME;
3877 int avformat_network_init(void)
3881 ff_network_inited_globally = 1;
3882 if ((ret = ff_network_init()) < 0)
3889 int avformat_network_deinit(void)
3898 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3899 uint64_t channel_layout, int32_t sample_rate,
3900 int32_t width, int32_t height)
3906 return AVERROR(EINVAL);
3909 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3911 if (channel_layout) {
3913 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3917 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3919 if (width || height) {
3921 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3923 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3925 return AVERROR(ENOMEM);
3926 bytestream_put_le32(&data, flags);
3928 bytestream_put_le32(&data, channels);
3930 bytestream_put_le64(&data, channel_layout);
3932 bytestream_put_le32(&data, sample_rate);
3933 if (width || height) {
3934 bytestream_put_le32(&data, width);
3935 bytestream_put_le32(&data, height);
3940 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3942 return ff_codec_bmp_tags;
3944 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3946 return ff_codec_wav_tags;