2 * various utility functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/bytestream.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/pixdesc.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
39 #include "audiointerleave.h"
53 * various utility functions for use within Libav
56 unsigned avformat_version(void)
58 return LIBAVFORMAT_VERSION_INT;
61 const char *avformat_configuration(void)
63 return LIBAV_CONFIGURATION;
66 const char *avformat_license(void)
68 #define LICENSE_PREFIX "libavformat license: "
69 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
72 /* fraction handling */
75 * f = val + (num / den) + 0.5.
77 * 'num' is normalized so that it is such as 0 <= num < den.
79 * @param f fractional number
80 * @param val integer value
81 * @param num must be >= 0
82 * @param den must be >= 1
84 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
97 * Fractional addition to f: f = f + (incr / f->den).
99 * @param f fractional number
100 * @param incr increment, can be positive or negative
102 static void frac_add(AVFrac *f, int64_t incr)
115 } else if (num >= den) {
122 /** head of registered input format linked list */
123 static AVInputFormat *first_iformat = NULL;
124 /** head of registered output format linked list */
125 static AVOutputFormat *first_oformat = NULL;
127 AVInputFormat *av_iformat_next(AVInputFormat *f)
129 if(f) return f->next;
130 else return first_iformat;
133 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
135 if(f) return f->next;
136 else return first_oformat;
139 void av_register_input_format(AVInputFormat *format)
143 while (*p != NULL) p = &(*p)->next;
148 void av_register_output_format(AVOutputFormat *format)
152 while (*p != NULL) p = &(*p)->next;
157 int av_match_ext(const char *filename, const char *extensions)
165 ext = strrchr(filename, '.');
171 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
174 if (!av_strcasecmp(ext1, ext))
184 static int match_format(const char *name, const char *names)
192 namelen = strlen(name);
193 while ((p = strchr(names, ','))) {
194 len = FFMAX(p - names, namelen);
195 if (!av_strncasecmp(name, names, len))
199 return !av_strcasecmp(name, names);
202 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
203 const char *mime_type)
205 AVOutputFormat *fmt = NULL, *fmt_found;
206 int score_max, score;
208 /* specific test for image sequences */
209 #if CONFIG_IMAGE2_MUXER
210 if (!short_name && filename &&
211 av_filename_number_test(filename) &&
212 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
213 return av_guess_format("image2", NULL, NULL);
216 /* Find the proper file type. */
219 while ((fmt = av_oformat_next(fmt))) {
221 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
223 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
225 if (filename && fmt->extensions &&
226 av_match_ext(filename, fmt->extensions)) {
229 if (score > score_max) {
237 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
238 const char *filename, const char *mime_type, enum AVMediaType type){
239 if(type == AVMEDIA_TYPE_VIDEO){
240 enum CodecID codec_id= CODEC_ID_NONE;
242 #if CONFIG_IMAGE2_MUXER
243 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
244 codec_id= ff_guess_image2_codec(filename);
247 if(codec_id == CODEC_ID_NONE)
248 codec_id= fmt->video_codec;
250 }else if(type == AVMEDIA_TYPE_AUDIO)
251 return fmt->audio_codec;
252 else if (type == AVMEDIA_TYPE_SUBTITLE)
253 return fmt->subtitle_codec;
255 return CODEC_ID_NONE;
258 AVInputFormat *av_find_input_format(const char *short_name)
260 AVInputFormat *fmt = NULL;
261 while ((fmt = av_iformat_next(fmt))) {
262 if (match_format(short_name, fmt->name))
269 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
271 int ret= av_new_packet(pkt, size);
276 pkt->pos= avio_tell(s);
278 ret= avio_read(s, pkt->data, size);
282 av_shrink_packet(pkt, ret);
287 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
292 return av_get_packet(s, pkt, size);
293 old_size = pkt->size;
294 ret = av_grow_packet(pkt, size);
297 ret = avio_read(s, pkt->data + old_size, size);
298 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
303 int av_filename_number_test(const char *filename)
306 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
309 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
311 AVProbeData lpd = *pd;
312 AVInputFormat *fmt1 = NULL, *fmt;
315 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
316 int id3len = ff_id3v2_tag_len(lpd.buf);
317 if (lpd.buf_size > id3len + 16) {
319 lpd.buf_size -= id3len;
325 while ((fmt1 = av_iformat_next(fmt1))) {
326 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
329 if (fmt1->read_probe) {
330 score = fmt1->read_probe(&lpd);
331 } else if (fmt1->extensions) {
332 if (av_match_ext(lpd.filename, fmt1->extensions)) {
336 if (score > *score_max) {
339 }else if (score == *score_max)
343 /* a hack for files with huge id3v2 tags -- try to guess by file extension. */
344 if (!fmt && is_opened && *score_max < AVPROBE_SCORE_MAX/4) {
345 while ((fmt = av_iformat_next(fmt)))
346 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
347 *score_max = AVPROBE_SCORE_MAX/4;
352 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4-1) {
353 while ((fmt = av_iformat_next(fmt)))
354 if (fmt->extensions && av_match_ext("mp3", fmt->extensions)) {
355 *score_max = AVPROBE_SCORE_MAX/4-1;
363 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
365 return av_probe_input_format2(pd, is_opened, &score);
368 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
370 static const struct {
371 const char *name; enum CodecID id; enum AVMediaType type;
373 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
374 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
375 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
376 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
377 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
378 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
379 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
380 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
383 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
387 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
388 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
389 for (i = 0; fmt_id_type[i].name; i++) {
390 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
391 st->codec->codec_id = fmt_id_type[i].id;
392 st->codec->codec_type = fmt_id_type[i].type;
400 /************************************************************/
401 /* input media file */
403 /** size of probe buffer, for guessing file type from file contents */
404 #define PROBE_BUF_MIN 2048
405 #define PROBE_BUF_MAX (1<<20)
407 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
408 const char *filename, void *logctx,
409 unsigned int offset, unsigned int max_probe_size)
411 AVProbeData pd = { filename ? filename : "", NULL, -offset };
412 unsigned char *buf = NULL;
413 int ret = 0, probe_size;
415 if (!max_probe_size) {
416 max_probe_size = PROBE_BUF_MAX;
417 } else if (max_probe_size > PROBE_BUF_MAX) {
418 max_probe_size = PROBE_BUF_MAX;
419 } else if (max_probe_size < PROBE_BUF_MIN) {
420 return AVERROR(EINVAL);
423 if (offset >= max_probe_size) {
424 return AVERROR(EINVAL);
427 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
428 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
429 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
430 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
432 if (probe_size < offset) {
436 /* read probe data */
437 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
438 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
439 /* fail if error was not end of file, otherwise, lower score */
440 if (ret != AVERROR_EOF) {
445 ret = 0; /* error was end of file, nothing read */
448 pd.buf = &buf[offset];
450 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
452 /* guess file format */
453 *fmt = av_probe_input_format2(&pd, 1, &score);
455 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
456 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
458 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
464 return AVERROR_INVALIDDATA;
467 /* rewind. reuse probe buffer to avoid seeking */
468 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
474 /* open input file and probe the format if necessary */
475 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
478 AVProbeData pd = {filename, NULL, 0};
481 s->flags |= AVFMT_FLAG_CUSTOM_IO;
483 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
484 else if (s->iformat->flags & AVFMT_NOFILE)
485 return AVERROR(EINVAL);
489 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
490 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
493 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ,
494 &s->interrupt_callback, options)) < 0)
498 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
501 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
502 AVPacketList **plast_pktl){
503 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
508 (*plast_pktl)->next = pktl;
510 *packet_buffer = pktl;
512 /* add the packet in the buffered packet list */
518 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
520 AVFormatContext *s = *ps;
522 AVDictionary *tmp = NULL;
523 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
525 if (!s && !(s = avformat_alloc_context()))
526 return AVERROR(ENOMEM);
531 av_dict_copy(&tmp, *options, 0);
533 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
536 if ((ret = init_input(s, filename, &tmp)) < 0)
539 /* check filename in case an image number is expected */
540 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
541 if (!av_filename_number_test(filename)) {
542 ret = AVERROR(EINVAL);
547 s->duration = s->start_time = AV_NOPTS_VALUE;
548 av_strlcpy(s->filename, filename, sizeof(s->filename));
550 /* allocate private data */
551 if (s->iformat->priv_data_size > 0) {
552 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
553 ret = AVERROR(ENOMEM);
556 if (s->iformat->priv_class) {
557 *(const AVClass**)s->priv_data = s->iformat->priv_class;
558 av_opt_set_defaults(s->priv_data);
559 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
564 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
566 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
568 if (s->iformat->read_header)
569 if ((ret = s->iformat->read_header(s)) < 0)
572 if (id3v2_extra_meta &&
573 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
575 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
577 /* queue attached pictures */
578 for (i = 0; i < s->nb_streams; i++)
579 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
580 AVPacket copy = s->streams[i]->attached_pic;
581 copy.destruct = NULL;
582 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
585 if (s->pb && !s->data_offset)
586 s->data_offset = avio_tell(s->pb);
588 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
591 av_dict_free(options);
598 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
600 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
602 avformat_free_context(s);
607 /*******************************************************/
609 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
615 AVPacketList *pktl = s->raw_packet_buffer;
619 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
620 !s->streams[pkt->stream_index]->probe_packets ||
621 s->raw_packet_buffer_remaining_size < pkt->size){
622 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
625 s->raw_packet_buffer = pktl->next;
626 s->raw_packet_buffer_remaining_size += pkt->size;
633 ret= s->iformat->read_packet(s, pkt);
635 if (!pktl || ret == AVERROR(EAGAIN))
637 for (i = 0; i < s->nb_streams; i++)
638 s->streams[i]->probe_packets = 0;
642 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
643 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
644 av_log(s, AV_LOG_WARNING,
645 "Dropped corrupted packet (stream = %d)\n",
651 st= s->streams[pkt->stream_index];
653 switch(st->codec->codec_type){
654 case AVMEDIA_TYPE_VIDEO:
655 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
657 case AVMEDIA_TYPE_AUDIO:
658 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
660 case AVMEDIA_TYPE_SUBTITLE:
661 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
665 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
669 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
670 s->raw_packet_buffer_remaining_size -= pkt->size;
672 if(st->codec->codec_id == CODEC_ID_PROBE){
673 AVProbeData *pd = &st->probe_data;
674 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
677 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
678 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
679 pd->buf_size += pkt->size;
680 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
682 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
683 //FIXME we do not reduce score to 0 for the case of running out of buffer space in bytes
684 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
685 if(st->codec->codec_id != CODEC_ID_PROBE){
688 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
695 /**********************************************************/
698 * Get the number of samples of an audio frame. Return -1 on error.
700 static int get_audio_frame_size(AVCodecContext *enc, int size, int mux)
704 /* give frame_size priority if demuxing */
705 if (!mux && enc->frame_size > 1)
706 return enc->frame_size;
708 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
711 /* fallback to using frame_size if muxing */
712 if (enc->frame_size > 1)
713 return enc->frame_size;
720 * Return the frame duration in seconds. Return 0 if not available.
722 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
723 AVCodecParserContext *pc, AVPacket *pkt)
729 switch(st->codec->codec_type) {
730 case AVMEDIA_TYPE_VIDEO:
731 if (st->r_frame_rate.num) {
732 *pnum = st->r_frame_rate.den;
733 *pden = st->r_frame_rate.num;
734 } else if(st->time_base.num*1000LL > st->time_base.den) {
735 *pnum = st->time_base.num;
736 *pden = st->time_base.den;
737 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
738 *pnum = st->codec->time_base.num;
739 *pden = st->codec->time_base.den;
740 if (pc && pc->repeat_pict) {
741 *pnum = (*pnum) * (1 + pc->repeat_pict);
743 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
744 //Thus if we have no parser in such case leave duration undefined.
745 if(st->codec->ticks_per_frame>1 && !pc){
750 case AVMEDIA_TYPE_AUDIO:
751 frame_size = get_audio_frame_size(st->codec, pkt->size, 0);
752 if (frame_size <= 0 || st->codec->sample_rate <= 0)
755 *pden = st->codec->sample_rate;
762 static int is_intra_only(AVCodecContext *enc){
763 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
765 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
766 switch(enc->codec_id){
768 case CODEC_ID_MJPEGB:
770 case CODEC_ID_PRORES:
771 case CODEC_ID_RAWVIDEO:
772 case CODEC_ID_DVVIDEO:
773 case CODEC_ID_HUFFYUV:
774 case CODEC_ID_FFVHUFF:
779 case CODEC_ID_JPEG2000:
787 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
788 int64_t dts, int64_t pts)
790 AVStream *st= s->streams[stream_index];
791 AVPacketList *pktl= s->packet_buffer;
793 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
796 st->first_dts= dts - st->cur_dts;
799 for(; pktl; pktl= pktl->next){
800 if(pktl->pkt.stream_index != stream_index)
802 //FIXME think more about this check
803 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
804 pktl->pkt.pts += st->first_dts;
806 if(pktl->pkt.dts != AV_NOPTS_VALUE)
807 pktl->pkt.dts += st->first_dts;
809 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
810 st->start_time= pktl->pkt.pts;
812 if (st->start_time == AV_NOPTS_VALUE)
813 st->start_time = pts;
816 static void update_initial_durations(AVFormatContext *s, AVStream *st,
817 int stream_index, int duration)
819 AVPacketList *pktl= s->packet_buffer;
822 if(st->first_dts != AV_NOPTS_VALUE){
823 cur_dts= st->first_dts;
824 for(; pktl; pktl= pktl->next){
825 if(pktl->pkt.stream_index == stream_index){
826 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
831 pktl= s->packet_buffer;
832 st->first_dts = cur_dts;
833 }else if(st->cur_dts)
836 for(; pktl; pktl= pktl->next){
837 if(pktl->pkt.stream_index != stream_index)
839 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
840 && !pktl->pkt.duration){
841 pktl->pkt.dts= cur_dts;
842 if(!st->codec->has_b_frames)
843 pktl->pkt.pts= cur_dts;
845 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
846 pktl->pkt.duration = duration;
850 if(st->first_dts == AV_NOPTS_VALUE)
851 st->cur_dts= cur_dts;
854 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
855 AVCodecParserContext *pc, AVPacket *pkt)
857 int num, den, presentation_delayed, delay, i;
860 if (s->flags & AVFMT_FLAG_NOFILLIN)
863 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
864 pkt->dts= AV_NOPTS_VALUE;
866 /* do we have a video B-frame ? */
867 delay= st->codec->has_b_frames;
868 presentation_delayed = 0;
870 /* XXX: need has_b_frame, but cannot get it if the codec is
873 pc && pc->pict_type != AV_PICTURE_TYPE_B)
874 presentation_delayed = 1;
876 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
877 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
878 pkt->dts -= 1LL<<st->pts_wrap_bits;
881 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
882 // we take the conservative approach and discard both
883 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
884 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
885 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
886 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
889 if (pkt->duration == 0 && st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
890 compute_frame_duration(&num, &den, st, pc, pkt);
892 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
894 if(pkt->duration != 0 && s->packet_buffer)
895 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
899 /* correct timestamps with byte offset if demuxers only have timestamps
900 on packet boundaries */
901 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
902 /* this will estimate bitrate based on this frame's duration and size */
903 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
904 if(pkt->pts != AV_NOPTS_VALUE)
906 if(pkt->dts != AV_NOPTS_VALUE)
910 if (pc && pc->dts_sync_point >= 0) {
911 // we have synchronization info from the parser
912 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
914 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
915 if (pkt->dts != AV_NOPTS_VALUE) {
916 // got DTS from the stream, update reference timestamp
917 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
918 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
919 } else if (st->reference_dts != AV_NOPTS_VALUE) {
920 // compute DTS based on reference timestamp
921 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
922 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
924 if (pc->dts_sync_point > 0)
925 st->reference_dts = pkt->dts; // new reference
929 /* This may be redundant, but it should not hurt. */
930 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
931 presentation_delayed = 1;
933 // 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);
934 /* interpolate PTS and DTS if they are not present */
935 //We skip H264 currently because delay and has_b_frames are not reliably set
936 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
937 if (presentation_delayed) {
938 /* DTS = decompression timestamp */
939 /* PTS = presentation timestamp */
940 if (pkt->dts == AV_NOPTS_VALUE)
941 pkt->dts = st->last_IP_pts;
942 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
943 if (pkt->dts == AV_NOPTS_VALUE)
944 pkt->dts = st->cur_dts;
946 /* this is tricky: the dts must be incremented by the duration
947 of the frame we are displaying, i.e. the last I- or P-frame */
948 if (st->last_IP_duration == 0)
949 st->last_IP_duration = pkt->duration;
950 if(pkt->dts != AV_NOPTS_VALUE)
951 st->cur_dts = pkt->dts + st->last_IP_duration;
952 st->last_IP_duration = pkt->duration;
953 st->last_IP_pts= pkt->pts;
954 /* cannot compute PTS if not present (we can compute it only
955 by knowing the future */
956 } else if (pkt->pts != AV_NOPTS_VALUE ||
957 pkt->dts != AV_NOPTS_VALUE ||
959 st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
960 int duration = pkt->duration;
961 if (!duration && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
962 compute_frame_duration(&num, &den, st, pc, pkt);
964 duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den,
965 den * (int64_t)st->time_base.num,
967 if (duration != 0 && s->packet_buffer) {
968 update_initial_durations(s, st, pkt->stream_index,
974 if(pkt->pts != AV_NOPTS_VALUE && duration){
975 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
976 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
977 if(old_diff < new_diff && old_diff < (duration>>3)){
978 pkt->pts += duration;
979 // 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);
983 /* presentation is not delayed : PTS and DTS are the same */
984 if(pkt->pts == AV_NOPTS_VALUE)
986 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
987 if(pkt->pts == AV_NOPTS_VALUE)
988 pkt->pts = st->cur_dts;
990 if(pkt->pts != AV_NOPTS_VALUE)
991 st->cur_dts = pkt->pts + duration;
995 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
996 st->pts_buffer[0]= pkt->pts;
997 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
998 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
999 if(pkt->dts == AV_NOPTS_VALUE)
1000 pkt->dts= st->pts_buffer[0];
1001 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1002 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1004 if(pkt->dts > st->cur_dts)
1005 st->cur_dts = pkt->dts;
1008 // 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);
1011 if(is_intra_only(st->codec))
1012 pkt->flags |= AV_PKT_FLAG_KEY;
1014 pkt->convergence_duration = pc->convergence_duration;
1017 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1020 AVPacketList *pktl = *pkt_buf;
1021 *pkt_buf = pktl->next;
1022 av_free_packet(&pktl->pkt);
1025 *pkt_buf_end = NULL;
1029 * Parse a packet, add all split parts to parse_queue
1031 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1033 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1035 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1036 AVStream *st = s->streams[stream_index];
1037 uint8_t *data = pkt ? pkt->data : NULL;
1038 int size = pkt ? pkt->size : 0;
1039 int ret = 0, got_output = 0;
1042 av_init_packet(&flush_pkt);
1047 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1050 av_init_packet(&out_pkt);
1051 len = av_parser_parse2(st->parser, st->codec,
1052 &out_pkt.data, &out_pkt.size, data, size,
1053 pkt->pts, pkt->dts, pkt->pos);
1055 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1056 /* increment read pointer */
1060 got_output = !!out_pkt.size;
1065 /* set the duration */
1066 out_pkt.duration = 0;
1067 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1068 if (st->codec->sample_rate > 0) {
1069 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1070 (AVRational){ 1, st->codec->sample_rate },
1074 } else if (st->codec->time_base.num != 0 &&
1075 st->codec->time_base.den != 0) {
1076 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1077 st->codec->time_base,
1082 out_pkt.stream_index = st->index;
1083 out_pkt.pts = st->parser->pts;
1084 out_pkt.dts = st->parser->dts;
1085 out_pkt.pos = st->parser->pos;
1087 if (st->parser->key_frame == 1 ||
1088 (st->parser->key_frame == -1 &&
1089 st->parser->pict_type == AV_PICTURE_TYPE_I))
1090 out_pkt.flags |= AV_PKT_FLAG_KEY;
1092 compute_pkt_fields(s, st, st->parser, &out_pkt);
1094 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1095 out_pkt.flags & AV_PKT_FLAG_KEY) {
1096 ff_reduce_index(s, st->index);
1097 av_add_index_entry(st, st->parser->frame_offset, out_pkt.dts,
1098 0, 0, AVINDEX_KEYFRAME);
1101 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1102 out_pkt.destruct = pkt->destruct;
1103 pkt->destruct = NULL;
1105 if ((ret = av_dup_packet(&out_pkt)) < 0)
1108 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1109 av_free_packet(&out_pkt);
1110 ret = AVERROR(ENOMEM);
1116 /* end of the stream => close and free the parser */
1117 if (pkt == &flush_pkt) {
1118 av_parser_close(st->parser);
1123 av_free_packet(pkt);
1127 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1128 AVPacketList **pkt_buffer_end,
1132 av_assert0(*pkt_buffer);
1135 *pkt_buffer = pktl->next;
1137 *pkt_buffer_end = NULL;
1142 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1144 int ret = 0, i, got_packet = 0;
1146 av_init_packet(pkt);
1148 while (!got_packet && !s->parse_queue) {
1152 /* read next packet */
1153 ret = av_read_packet(s, &cur_pkt);
1155 if (ret == AVERROR(EAGAIN))
1157 /* flush the parsers */
1158 for(i = 0; i < s->nb_streams; i++) {
1160 if (st->parser && st->need_parsing)
1161 parse_packet(s, NULL, st->index);
1163 /* all remaining packets are now in parse_queue =>
1164 * really terminate parsing */
1168 st = s->streams[cur_pkt.stream_index];
1170 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1171 cur_pkt.dts != AV_NOPTS_VALUE &&
1172 cur_pkt.pts < cur_pkt.dts) {
1173 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1174 cur_pkt.stream_index,
1179 if (s->debug & FF_FDEBUG_TS)
1180 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1181 cur_pkt.stream_index,
1188 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1189 st->parser = av_parser_init(st->codec->codec_id);
1191 /* no parser available: just output the raw packets */
1192 st->need_parsing = AVSTREAM_PARSE_NONE;
1193 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1194 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1195 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1196 st->parser->flags |= PARSER_FLAG_ONCE;
1200 if (!st->need_parsing || !st->parser) {
1201 /* no parsing needed: we just output the packet as is */
1203 compute_pkt_fields(s, st, NULL, pkt);
1204 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1205 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1206 ff_reduce_index(s, st->index);
1207 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1210 } else if (st->discard < AVDISCARD_ALL) {
1211 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1215 av_free_packet(&cur_pkt);
1219 if (!got_packet && s->parse_queue)
1220 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1222 if(s->debug & FF_FDEBUG_TS)
1223 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1234 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1236 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1240 return s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1241 &s->packet_buffer_end,
1243 read_frame_internal(s, pkt);
1247 AVPacketList *pktl = s->packet_buffer;
1250 AVPacket *next_pkt = &pktl->pkt;
1252 if (next_pkt->dts != AV_NOPTS_VALUE) {
1253 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1254 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1255 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1256 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1257 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1258 next_pkt->pts = pktl->pkt.dts;
1262 pktl = s->packet_buffer;
1265 /* read packet from packet buffer, if there is data */
1266 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1267 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1268 return read_from_packet_buffer(&s->packet_buffer,
1269 &s->packet_buffer_end, pkt);
1272 ret = read_frame_internal(s, pkt);
1274 if (pktl && ret != AVERROR(EAGAIN)) {
1281 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1282 &s->packet_buffer_end)) < 0)
1283 return AVERROR(ENOMEM);
1287 /* XXX: suppress the packet queue */
1288 static void flush_packet_queue(AVFormatContext *s)
1290 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1291 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1292 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1294 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1297 /*******************************************************/
1300 int av_find_default_stream_index(AVFormatContext *s)
1302 int first_audio_index = -1;
1306 if (s->nb_streams <= 0)
1308 for(i = 0; i < s->nb_streams; i++) {
1310 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1313 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1314 first_audio_index = i;
1316 return first_audio_index >= 0 ? first_audio_index : 0;
1320 * Flush the frame reader.
1322 void ff_read_frame_flush(AVFormatContext *s)
1327 flush_packet_queue(s);
1329 /* for each stream, reset read state */
1330 for(i = 0; i < s->nb_streams; i++) {
1334 av_parser_close(st->parser);
1337 st->last_IP_pts = AV_NOPTS_VALUE;
1338 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1339 st->reference_dts = AV_NOPTS_VALUE;
1341 st->probe_packets = MAX_PROBE_PACKETS;
1343 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1344 st->pts_buffer[j]= AV_NOPTS_VALUE;
1348 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1352 for(i = 0; i < s->nb_streams; i++) {
1353 AVStream *st = s->streams[i];
1355 st->cur_dts = av_rescale(timestamp,
1356 st->time_base.den * (int64_t)ref_st->time_base.num,
1357 st->time_base.num * (int64_t)ref_st->time_base.den);
1361 void ff_reduce_index(AVFormatContext *s, int stream_index)
1363 AVStream *st= s->streams[stream_index];
1364 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1366 if((unsigned)st->nb_index_entries >= max_entries){
1368 for(i=0; 2*i<st->nb_index_entries; i++)
1369 st->index_entries[i]= st->index_entries[2*i];
1370 st->nb_index_entries= i;
1374 int ff_add_index_entry(AVIndexEntry **index_entries,
1375 int *nb_index_entries,
1376 unsigned int *index_entries_allocated_size,
1377 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1379 AVIndexEntry *entries, *ie;
1382 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1385 entries = av_fast_realloc(*index_entries,
1386 index_entries_allocated_size,
1387 (*nb_index_entries + 1) *
1388 sizeof(AVIndexEntry));
1392 *index_entries= entries;
1394 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1397 index= (*nb_index_entries)++;
1398 ie= &entries[index];
1399 assert(index==0 || ie[-1].timestamp < timestamp);
1401 ie= &entries[index];
1402 if(ie->timestamp != timestamp){
1403 if(ie->timestamp <= timestamp)
1405 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1406 (*nb_index_entries)++;
1407 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1408 distance= ie->min_distance;
1412 ie->timestamp = timestamp;
1413 ie->min_distance= distance;
1420 int av_add_index_entry(AVStream *st,
1421 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1423 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1424 &st->index_entries_allocated_size, pos,
1425 timestamp, size, distance, flags);
1428 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1429 int64_t wanted_timestamp, int flags)
1437 //optimize appending index entries at the end
1438 if(b && entries[b-1].timestamp < wanted_timestamp)
1443 timestamp = entries[m].timestamp;
1444 if(timestamp >= wanted_timestamp)
1446 if(timestamp <= wanted_timestamp)
1449 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1451 if(!(flags & AVSEEK_FLAG_ANY)){
1452 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1453 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1462 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1465 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1466 wanted_timestamp, flags);
1469 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1471 AVInputFormat *avif= s->iformat;
1472 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1473 int64_t ts_min, ts_max, ts;
1478 if (stream_index < 0)
1481 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1484 ts_min= AV_NOPTS_VALUE;
1485 pos_limit= -1; //gcc falsely says it may be uninitialized
1487 st= s->streams[stream_index];
1488 if(st->index_entries){
1491 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()
1492 index= FFMAX(index, 0);
1493 e= &st->index_entries[index];
1495 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1497 ts_min= e->timestamp;
1498 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1504 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1505 assert(index < st->nb_index_entries);
1507 e= &st->index_entries[index];
1508 assert(e->timestamp >= target_ts);
1510 ts_max= e->timestamp;
1511 pos_limit= pos_max - e->min_distance;
1512 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1513 pos_max,pos_limit, ts_max);
1517 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1522 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1525 ff_update_cur_dts(s, st, ts);
1530 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1531 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1532 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1533 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1536 int64_t start_pos, filesize;
1539 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1541 if(ts_min == AV_NOPTS_VALUE){
1542 pos_min = s->data_offset;
1543 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1544 if (ts_min == AV_NOPTS_VALUE)
1548 if(ts_max == AV_NOPTS_VALUE){
1550 filesize = avio_size(s->pb);
1551 pos_max = filesize - 1;
1554 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1556 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1557 if (ts_max == AV_NOPTS_VALUE)
1561 int64_t tmp_pos= pos_max + 1;
1562 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1563 if(tmp_ts == AV_NOPTS_VALUE)
1567 if(tmp_pos >= filesize)
1573 if(ts_min > ts_max){
1575 }else if(ts_min == ts_max){
1580 while (pos_min < pos_limit) {
1581 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1582 pos_min, pos_max, ts_min, ts_max);
1583 assert(pos_limit <= pos_max);
1586 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1587 // interpolate position (better than dichotomy)
1588 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1589 + pos_min - approximate_keyframe_distance;
1590 }else if(no_change==1){
1591 // bisection, if interpolation failed to change min or max pos last time
1592 pos = (pos_min + pos_limit)>>1;
1594 /* linear search if bisection failed, can only happen if there
1595 are very few or no keyframes between min/max */
1600 else if(pos > pos_limit)
1604 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1609 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1610 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1611 pos_limit, start_pos, no_change);
1612 if(ts == AV_NOPTS_VALUE){
1613 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1616 assert(ts != AV_NOPTS_VALUE);
1617 if (target_ts <= ts) {
1618 pos_limit = start_pos - 1;
1622 if (target_ts >= ts) {
1628 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1629 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1631 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1633 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1634 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1635 pos, ts_min, target_ts, ts_max);
1640 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1641 int64_t pos_min, pos_max;
1645 if (stream_index < 0)
1648 st= s->streams[stream_index];
1651 pos_min = s->data_offset;
1652 pos_max = avio_size(s->pb) - 1;
1654 if (pos < pos_min) pos= pos_min;
1655 else if(pos > pos_max) pos= pos_max;
1657 avio_seek(s->pb, pos, SEEK_SET);
1660 av_update_cur_dts(s, st, ts);
1665 static int seek_frame_generic(AVFormatContext *s,
1666 int stream_index, int64_t timestamp, int flags)
1673 st = s->streams[stream_index];
1675 index = av_index_search_timestamp(st, timestamp, flags);
1677 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1680 if(index < 0 || index==st->nb_index_entries-1){
1683 if(st->nb_index_entries){
1684 assert(st->index_entries);
1685 ie= &st->index_entries[st->nb_index_entries-1];
1686 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1688 ff_update_cur_dts(s, st, ie->timestamp);
1690 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1696 read_status = av_read_frame(s, &pkt);
1697 } while (read_status == AVERROR(EAGAIN));
1698 if (read_status < 0)
1700 av_free_packet(&pkt);
1701 if(stream_index == pkt.stream_index){
1702 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1706 index = av_index_search_timestamp(st, timestamp, flags);
1711 ff_read_frame_flush(s);
1712 if (s->iformat->read_seek){
1713 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1716 ie = &st->index_entries[index];
1717 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1719 ff_update_cur_dts(s, st, ie->timestamp);
1724 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1729 if (flags & AVSEEK_FLAG_BYTE) {
1730 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1732 ff_read_frame_flush(s);
1733 return seek_frame_byte(s, stream_index, timestamp, flags);
1736 if(stream_index < 0){
1737 stream_index= av_find_default_stream_index(s);
1738 if(stream_index < 0)
1741 st= s->streams[stream_index];
1742 /* timestamp for default must be expressed in AV_TIME_BASE units */
1743 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1746 /* first, we try the format specific seek */
1747 if (s->iformat->read_seek) {
1748 ff_read_frame_flush(s);
1749 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1756 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1757 ff_read_frame_flush(s);
1758 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1759 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1760 ff_read_frame_flush(s);
1761 return seek_frame_generic(s, stream_index, timestamp, flags);
1767 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1769 if(min_ts > ts || max_ts < ts)
1772 if (s->iformat->read_seek2) {
1773 ff_read_frame_flush(s);
1774 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1777 if(s->iformat->read_timestamp){
1778 //try to seek via read_timestamp()
1781 //Fallback to old API if new is not implemented but old is
1782 //Note the old has somewat different sematics
1783 if(s->iformat->read_seek || 1)
1784 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1786 // try some generic seek like seek_frame_generic() but with new ts semantics
1789 /*******************************************************/
1792 * Return TRUE if the stream has accurate duration in any stream.
1794 * @return TRUE if the stream has accurate duration for at least one component.
1796 static int has_duration(AVFormatContext *ic)
1801 for(i = 0;i < ic->nb_streams; i++) {
1802 st = ic->streams[i];
1803 if (st->duration != AV_NOPTS_VALUE)
1810 * Estimate the stream timings from the one of each components.
1812 * Also computes the global bitrate if possible.
1814 static void update_stream_timings(AVFormatContext *ic)
1816 int64_t start_time, start_time1, end_time, end_time1;
1817 int64_t duration, duration1, filesize;
1821 start_time = INT64_MAX;
1822 end_time = INT64_MIN;
1823 duration = INT64_MIN;
1824 for(i = 0;i < ic->nb_streams; i++) {
1825 st = ic->streams[i];
1826 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1827 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1828 start_time = FFMIN(start_time, start_time1);
1829 if (st->duration != AV_NOPTS_VALUE) {
1830 end_time1 = start_time1
1831 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1832 end_time = FFMAX(end_time, end_time1);
1835 if (st->duration != AV_NOPTS_VALUE) {
1836 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1837 duration = FFMAX(duration, duration1);
1840 if (start_time != INT64_MAX) {
1841 ic->start_time = start_time;
1842 if (end_time != INT64_MIN)
1843 duration = FFMAX(duration, end_time - start_time);
1845 if (duration != INT64_MIN) {
1846 ic->duration = duration;
1847 if (ic->pb && (filesize = avio_size(ic->pb)) > 0) {
1848 /* compute the bitrate */
1849 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1850 (double)ic->duration;
1855 static void fill_all_stream_timings(AVFormatContext *ic)
1860 update_stream_timings(ic);
1861 for(i = 0;i < ic->nb_streams; i++) {
1862 st = ic->streams[i];
1863 if (st->start_time == AV_NOPTS_VALUE) {
1864 if(ic->start_time != AV_NOPTS_VALUE)
1865 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1866 if(ic->duration != AV_NOPTS_VALUE)
1867 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1872 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1874 int64_t filesize, duration;
1878 /* if bit_rate is already set, we believe it */
1879 if (ic->bit_rate <= 0) {
1881 for(i=0;i<ic->nb_streams;i++) {
1882 st = ic->streams[i];
1883 if (st->codec->bit_rate > 0)
1884 bit_rate += st->codec->bit_rate;
1886 ic->bit_rate = bit_rate;
1889 /* if duration is already set, we believe it */
1890 if (ic->duration == AV_NOPTS_VALUE &&
1891 ic->bit_rate != 0) {
1892 filesize = ic->pb ? avio_size(ic->pb) : 0;
1894 for(i = 0; i < ic->nb_streams; i++) {
1895 st = ic->streams[i];
1896 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1897 if (st->duration == AV_NOPTS_VALUE)
1898 st->duration = duration;
1904 #define DURATION_MAX_READ_SIZE 250000
1905 #define DURATION_MAX_RETRY 3
1907 /* only usable for MPEG-PS streams */
1908 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1910 AVPacket pkt1, *pkt = &pkt1;
1912 int read_size, i, ret;
1914 int64_t filesize, offset, duration;
1917 /* flush packet queue */
1918 flush_packet_queue(ic);
1920 for (i=0; i<ic->nb_streams; i++) {
1921 st = ic->streams[i];
1922 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1923 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1926 av_parser_close(st->parser);
1931 /* estimate the end time (duration) */
1932 /* XXX: may need to support wrapping */
1933 filesize = ic->pb ? avio_size(ic->pb) : 0;
1934 end_time = AV_NOPTS_VALUE;
1936 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1940 avio_seek(ic->pb, offset, SEEK_SET);
1943 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1947 ret = av_read_packet(ic, pkt);
1948 } while(ret == AVERROR(EAGAIN));
1951 read_size += pkt->size;
1952 st = ic->streams[pkt->stream_index];
1953 if (pkt->pts != AV_NOPTS_VALUE &&
1954 (st->start_time != AV_NOPTS_VALUE ||
1955 st->first_dts != AV_NOPTS_VALUE)) {
1956 duration = end_time = pkt->pts;
1957 if (st->start_time != AV_NOPTS_VALUE)
1958 duration -= st->start_time;
1960 duration -= st->first_dts;
1962 duration += 1LL<<st->pts_wrap_bits;
1964 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1965 st->duration = duration;
1968 av_free_packet(pkt);
1970 }while( end_time==AV_NOPTS_VALUE
1971 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1972 && ++retry <= DURATION_MAX_RETRY);
1974 fill_all_stream_timings(ic);
1976 avio_seek(ic->pb, old_offset, SEEK_SET);
1977 for (i=0; i<ic->nb_streams; i++) {
1979 st->cur_dts= st->first_dts;
1980 st->last_IP_pts = AV_NOPTS_VALUE;
1981 st->reference_dts = AV_NOPTS_VALUE;
1985 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
1989 /* get the file size, if possible */
1990 if (ic->iformat->flags & AVFMT_NOFILE) {
1993 file_size = avio_size(ic->pb);
1994 file_size = FFMAX(0, file_size);
1997 if ((!strcmp(ic->iformat->name, "mpeg") ||
1998 !strcmp(ic->iformat->name, "mpegts")) &&
1999 file_size && ic->pb->seekable) {
2000 /* get accurate estimate from the PTSes */
2001 estimate_timings_from_pts(ic, old_offset);
2002 } else if (has_duration(ic)) {
2003 /* at least one component has timings - we use them for all
2005 fill_all_stream_timings(ic);
2007 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2008 /* less precise: use bitrate info */
2009 estimate_timings_from_bit_rate(ic);
2011 update_stream_timings(ic);
2015 AVStream av_unused *st;
2016 for(i = 0;i < ic->nb_streams; i++) {
2017 st = ic->streams[i];
2018 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2019 (double) st->start_time / AV_TIME_BASE,
2020 (double) st->duration / AV_TIME_BASE);
2022 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2023 (double) ic->start_time / AV_TIME_BASE,
2024 (double) ic->duration / AV_TIME_BASE,
2025 ic->bit_rate / 1000);
2029 static int has_codec_parameters(AVStream *st)
2031 AVCodecContext *avctx = st->codec;
2033 switch (avctx->codec_type) {
2034 case AVMEDIA_TYPE_AUDIO:
2035 val = avctx->sample_rate && avctx->channels;
2036 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2039 case AVMEDIA_TYPE_VIDEO:
2041 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2048 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2051 static int has_decode_delay_been_guessed(AVStream *st)
2053 return st->codec->codec_id != CODEC_ID_H264 ||
2054 st->info->nb_decoded_frames >= 6;
2057 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2058 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2061 int got_picture = 1, ret = 0;
2063 AVPacket pkt = *avpkt;
2065 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2066 AVDictionary *thread_opt = NULL;
2068 codec = st->codec->codec ? st->codec->codec :
2069 avcodec_find_decoder(st->codec->codec_id);
2072 st->info->found_decoder = -1;
2076 /* force thread count to 1 since the h264 decoder will not extract SPS
2077 * and PPS to extradata during multi-threaded decoding */
2078 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2079 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2081 av_dict_free(&thread_opt);
2083 st->info->found_decoder = -1;
2086 st->info->found_decoder = 1;
2087 } else if (!st->info->found_decoder)
2088 st->info->found_decoder = 1;
2090 if (st->info->found_decoder < 0)
2093 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2095 (!has_codec_parameters(st) ||
2096 !has_decode_delay_been_guessed(st) ||
2097 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2099 avcodec_get_frame_defaults(&picture);
2100 switch(st->codec->codec_type) {
2101 case AVMEDIA_TYPE_VIDEO:
2102 ret = avcodec_decode_video2(st->codec, &picture,
2103 &got_picture, &pkt);
2105 case AVMEDIA_TYPE_AUDIO:
2106 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2113 st->info->nb_decoded_frames++;
2122 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2124 while (tags->id != CODEC_ID_NONE) {
2132 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2135 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2136 if(tag == tags[i].tag)
2139 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2140 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2143 return CODEC_ID_NONE;
2146 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2149 for(i=0; tags && tags[i]; i++){
2150 int tag= ff_codec_get_tag(tags[i], id);
2156 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2159 for(i=0; tags && tags[i]; i++){
2160 enum CodecID id= ff_codec_get_id(tags[i], tag);
2161 if(id!=CODEC_ID_NONE) return id;
2163 return CODEC_ID_NONE;
2166 static void compute_chapters_end(AVFormatContext *s)
2169 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2171 for (i = 0; i < s->nb_chapters; i++)
2172 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2173 AVChapter *ch = s->chapters[i];
2174 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2177 for (j = 0; j < s->nb_chapters; j++) {
2178 AVChapter *ch1 = s->chapters[j];
2179 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2180 if (j != i && next_start > ch->start && next_start < end)
2183 ch->end = (end == INT64_MAX) ? ch->start : end;
2187 static int get_std_framerate(int i){
2188 if(i<60*12) return i*1001;
2189 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2193 * Is the time base unreliable.
2194 * This is a heuristic to balance between quick acceptance of the values in
2195 * the headers vs. some extra checks.
2196 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2197 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2198 * And there are "variable" fps files this needs to detect as well.
2200 static int tb_unreliable(AVCodecContext *c){
2201 if( c->time_base.den >= 101L*c->time_base.num
2202 || c->time_base.den < 5L*c->time_base.num
2203 /* || c->codec_tag == AV_RL32("DIVX")
2204 || c->codec_tag == AV_RL32("XVID")*/
2205 || c->codec_id == CODEC_ID_MPEG2VIDEO
2206 || c->codec_id == CODEC_ID_H264
2212 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2214 int i, count, ret, read_size, j;
2216 AVPacket pkt1, *pkt;
2217 int64_t old_offset = avio_tell(ic->pb);
2218 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2220 for(i=0;i<ic->nb_streams;i++) {
2222 AVDictionary *thread_opt = NULL;
2223 st = ic->streams[i];
2225 //only for the split stuff
2226 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2227 st->parser = av_parser_init(st->codec->codec_id);
2228 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2229 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2232 codec = st->codec->codec ? st->codec->codec :
2233 avcodec_find_decoder(st->codec->codec_id);
2235 /* force thread count to 1 since the h264 decoder will not extract SPS
2236 * and PPS to extradata during multi-threaded decoding */
2237 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2239 /* Ensure that subtitle_header is properly set. */
2240 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2241 && codec && !st->codec->codec)
2242 avcodec_open2(st->codec, codec, options ? &options[i]
2245 //try to just open decoders, in case this is enough to get parameters
2246 if (!has_codec_parameters(st)) {
2247 if (codec && !st->codec->codec)
2248 avcodec_open2(st->codec, codec, options ? &options[i]
2252 av_dict_free(&thread_opt);
2255 for (i=0; i<ic->nb_streams; i++) {
2256 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2262 if (ff_check_interrupt(&ic->interrupt_callback)){
2264 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2268 /* check if one codec still needs to be handled */
2269 for(i=0;i<ic->nb_streams;i++) {
2270 int fps_analyze_framecount = 20;
2272 st = ic->streams[i];
2273 if (!has_codec_parameters(st))
2275 /* if the timebase is coarse (like the usual millisecond precision
2276 of mkv), we need to analyze more frames to reliably arrive at
2278 if (av_q2d(st->time_base) > 0.0005)
2279 fps_analyze_framecount *= 2;
2280 if (ic->fps_probe_size >= 0)
2281 fps_analyze_framecount = ic->fps_probe_size;
2282 /* variable fps and no guess at the real fps */
2283 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2284 && st->info->duration_count < fps_analyze_framecount
2285 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2287 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2289 if(st->first_dts == AV_NOPTS_VALUE)
2292 if (i == ic->nb_streams) {
2293 /* NOTE: if the format has no header, then we need to read
2294 some packets to get most of the streams, so we cannot
2296 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2297 /* if we found the info for all the codecs, we can stop */
2299 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2303 /* we did not get all the codec info, but we read too much data */
2304 if (read_size >= ic->probesize) {
2306 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2310 /* NOTE: a new stream can be added there if no header in file
2311 (AVFMTCTX_NOHEADER) */
2312 ret = read_frame_internal(ic, &pkt1);
2313 if (ret == AVERROR(EAGAIN))
2318 AVPacket empty_pkt = { 0 };
2320 av_init_packet(&empty_pkt);
2322 ret = -1; /* we could not have all the codec parameters before EOF */
2323 for(i=0;i<ic->nb_streams;i++) {
2324 st = ic->streams[i];
2326 /* flush the decoders */
2327 if (st->info->found_decoder == 1) {
2329 err = try_decode_frame(st, &empty_pkt,
2330 (options && i < orig_nb_streams) ?
2331 &options[i] : NULL);
2332 } while (err > 0 && !has_codec_parameters(st));
2336 av_log(ic, AV_LOG_WARNING,
2337 "decoding for stream %d failed\n", st->index);
2338 } else if (!has_codec_parameters(st)) {
2340 avcodec_string(buf, sizeof(buf), st->codec, 0);
2341 av_log(ic, AV_LOG_WARNING,
2342 "Could not find codec parameters (%s)\n", buf);
2350 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2351 if ((ret = av_dup_packet(pkt)) < 0)
2352 goto find_stream_info_err;
2354 read_size += pkt->size;
2356 st = ic->streams[pkt->stream_index];
2357 if (st->codec_info_nb_frames>1) {
2358 if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2359 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2362 st->info->codec_info_duration += pkt->duration;
2365 int64_t last = st->info->last_dts;
2367 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2368 int64_t duration= pkt->dts - last;
2369 double dur= duration * av_q2d(st->time_base);
2371 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2372 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2373 if (st->info->duration_count < 2)
2374 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2375 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2376 int framerate= get_std_framerate(i);
2377 int ticks= lrintf(dur*framerate/(1001*12));
2378 double error = dur - (double)ticks*1001*12 / framerate;
2379 st->info->duration_error[i] += error*error;
2381 st->info->duration_count++;
2382 // ignore the first 4 values, they might have some random jitter
2383 if (st->info->duration_count > 3)
2384 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2386 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2387 st->info->last_dts = pkt->dts;
2389 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2390 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2391 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2392 st->codec->extradata_size= i;
2393 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2394 if (!st->codec->extradata)
2395 return AVERROR(ENOMEM);
2396 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2397 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2401 /* if still no information, we try to open the codec and to
2402 decompress the frame. We try to avoid that in most cases as
2403 it takes longer and uses more memory. For MPEG-4, we need to
2404 decompress for QuickTime.
2406 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2407 least one frame of codec data, this makes sure the codec initializes
2408 the channel configuration and does not only trust the values from the container.
2410 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2412 st->codec_info_nb_frames++;
2416 // close codecs which were opened in try_decode_frame()
2417 for(i=0;i<ic->nb_streams;i++) {
2418 st = ic->streams[i];
2419 avcodec_close(st->codec);
2421 for(i=0;i<ic->nb_streams;i++) {
2422 st = ic->streams[i];
2423 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2424 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2425 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2426 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2427 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2428 // the check for tb_unreliable() is not completely correct, since this is not about handling
2429 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2430 // ipmovie.c produces.
2431 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2432 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);
2433 if (st->info->duration_count && !st->r_frame_rate.num
2434 && tb_unreliable(st->codec) /*&&
2435 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2436 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2438 double best_error= 2*av_q2d(st->time_base);
2439 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2441 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2442 double error = st->info->duration_error[j] * get_std_framerate(j);
2443 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2444 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2445 if(error < best_error){
2447 num = get_std_framerate(j);
2450 // do not increase frame rate by more than 1 % in order to match a standard rate.
2451 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2452 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2454 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2455 if(!st->codec->bits_per_coded_sample)
2456 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2457 // set stream disposition based on audio service type
2458 switch (st->codec->audio_service_type) {
2459 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2460 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2461 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2462 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2463 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2464 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2465 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2466 st->disposition = AV_DISPOSITION_COMMENT; break;
2467 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2468 st->disposition = AV_DISPOSITION_KARAOKE; break;
2473 estimate_timings(ic, old_offset);
2475 compute_chapters_end(ic);
2478 /* correct DTS for B-frame streams with no timestamps */
2479 for(i=0;i<ic->nb_streams;i++) {
2480 st = ic->streams[i];
2481 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2483 ppktl = &ic->packet_buffer;
2485 if(ppkt1->stream_index != i)
2487 if(ppkt1->pkt->dts < 0)
2489 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2491 ppkt1->pkt->dts -= delta;
2496 st->cur_dts -= delta;
2502 find_stream_info_err:
2503 for (i=0; i < ic->nb_streams; i++) {
2504 if (ic->streams[i]->codec)
2505 ic->streams[i]->codec->thread_count = 0;
2506 av_freep(&ic->streams[i]->info);
2511 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2515 for (i = 0; i < ic->nb_programs; i++)
2516 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2517 if (ic->programs[i]->stream_index[j] == s)
2518 return ic->programs[i];
2522 int av_find_best_stream(AVFormatContext *ic,
2523 enum AVMediaType type,
2524 int wanted_stream_nb,
2526 AVCodec **decoder_ret,
2529 int i, nb_streams = ic->nb_streams;
2530 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2531 unsigned *program = NULL;
2532 AVCodec *decoder = NULL, *best_decoder = NULL;
2534 if (related_stream >= 0 && wanted_stream_nb < 0) {
2535 AVProgram *p = find_program_from_stream(ic, related_stream);
2537 program = p->stream_index;
2538 nb_streams = p->nb_stream_indexes;
2541 for (i = 0; i < nb_streams; i++) {
2542 int real_stream_index = program ? program[i] : i;
2543 AVStream *st = ic->streams[real_stream_index];
2544 AVCodecContext *avctx = st->codec;
2545 if (avctx->codec_type != type)
2547 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2549 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2552 decoder = avcodec_find_decoder(st->codec->codec_id);
2555 ret = AVERROR_DECODER_NOT_FOUND;
2559 if (best_count >= st->codec_info_nb_frames)
2561 best_count = st->codec_info_nb_frames;
2562 ret = real_stream_index;
2563 best_decoder = decoder;
2564 if (program && i == nb_streams - 1 && ret < 0) {
2566 nb_streams = ic->nb_streams;
2567 i = 0; /* no related stream found, try again with everything */
2571 *decoder_ret = best_decoder;
2575 /*******************************************************/
2577 int av_read_play(AVFormatContext *s)
2579 if (s->iformat->read_play)
2580 return s->iformat->read_play(s);
2582 return avio_pause(s->pb, 0);
2583 return AVERROR(ENOSYS);
2586 int av_read_pause(AVFormatContext *s)
2588 if (s->iformat->read_pause)
2589 return s->iformat->read_pause(s);
2591 return avio_pause(s->pb, 1);
2592 return AVERROR(ENOSYS);
2595 void avformat_free_context(AVFormatContext *s)
2601 if (s->iformat && s->iformat->priv_class && s->priv_data)
2602 av_opt_free(s->priv_data);
2604 for(i=0;i<s->nb_streams;i++) {
2605 /* free all data in a stream component */
2608 av_parser_close(st->parser);
2610 if (st->attached_pic.data)
2611 av_free_packet(&st->attached_pic);
2612 av_dict_free(&st->metadata);
2613 av_free(st->index_entries);
2614 av_free(st->codec->extradata);
2615 av_free(st->codec->subtitle_header);
2617 av_free(st->priv_data);
2621 for(i=s->nb_programs-1; i>=0; i--) {
2622 av_dict_free(&s->programs[i]->metadata);
2623 av_freep(&s->programs[i]->stream_index);
2624 av_freep(&s->programs[i]);
2626 av_freep(&s->programs);
2627 av_freep(&s->priv_data);
2628 while(s->nb_chapters--) {
2629 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2630 av_free(s->chapters[s->nb_chapters]);
2632 av_freep(&s->chapters);
2633 av_dict_free(&s->metadata);
2634 av_freep(&s->streams);
2638 #if FF_API_CLOSE_INPUT_FILE
2639 void av_close_input_file(AVFormatContext *s)
2641 avformat_close_input(&s);
2645 void avformat_close_input(AVFormatContext **ps)
2647 AVFormatContext *s = *ps;
2648 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2650 flush_packet_queue(s);
2651 if (s->iformat->read_close)
2652 s->iformat->read_close(s);
2653 avformat_free_context(s);
2659 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2665 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2667 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2670 s->streams = streams;
2672 st = av_mallocz(sizeof(AVStream));
2675 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2680 st->codec = avcodec_alloc_context3(c);
2682 /* no default bitrate if decoding */
2683 st->codec->bit_rate = 0;
2685 st->index = s->nb_streams;
2686 st->start_time = AV_NOPTS_VALUE;
2687 st->duration = AV_NOPTS_VALUE;
2688 /* we set the current DTS to 0 so that formats without any timestamps
2689 but durations get some timestamps, formats with some unknown
2690 timestamps have their first few packets buffered and the
2691 timestamps corrected before they are returned to the user */
2693 st->first_dts = AV_NOPTS_VALUE;
2694 st->probe_packets = MAX_PROBE_PACKETS;
2696 /* default pts setting is MPEG-like */
2697 avpriv_set_pts_info(st, 33, 1, 90000);
2698 st->last_IP_pts = AV_NOPTS_VALUE;
2699 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2700 st->pts_buffer[i]= AV_NOPTS_VALUE;
2701 st->reference_dts = AV_NOPTS_VALUE;
2703 st->sample_aspect_ratio = (AVRational){0,1};
2705 s->streams[s->nb_streams++] = st;
2709 AVProgram *av_new_program(AVFormatContext *ac, int id)
2711 AVProgram *program=NULL;
2714 av_dlog(ac, "new_program: id=0x%04x\n", id);
2716 for(i=0; i<ac->nb_programs; i++)
2717 if(ac->programs[i]->id == id)
2718 program = ac->programs[i];
2721 program = av_mallocz(sizeof(AVProgram));
2724 dynarray_add(&ac->programs, &ac->nb_programs, program);
2725 program->discard = AVDISCARD_NONE;
2732 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2734 AVChapter *chapter = NULL;
2737 for(i=0; i<s->nb_chapters; i++)
2738 if(s->chapters[i]->id == id)
2739 chapter = s->chapters[i];
2742 chapter= av_mallocz(sizeof(AVChapter));
2745 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2747 av_dict_set(&chapter->metadata, "title", title, 0);
2749 chapter->time_base= time_base;
2750 chapter->start = start;
2756 /************************************************************/
2757 /* output media file */
2759 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2761 const AVCodecTag *avctag;
2763 enum CodecID id = CODEC_ID_NONE;
2764 unsigned int tag = 0;
2767 * Check that tag + id is in the table
2768 * If neither is in the table -> OK
2769 * If tag is in the table with another id -> FAIL
2770 * If id is in the table with another tag -> FAIL unless strict < normal
2772 for (n = 0; s->oformat->codec_tag[n]; n++) {
2773 avctag = s->oformat->codec_tag[n];
2774 while (avctag->id != CODEC_ID_NONE) {
2775 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2777 if (id == st->codec->codec_id)
2780 if (avctag->id == st->codec->codec_id)
2785 if (id != CODEC_ID_NONE)
2787 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2792 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2796 AVDictionary *tmp = NULL;
2799 av_dict_copy(&tmp, *options, 0);
2800 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2803 // some sanity checks
2804 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2805 av_log(s, AV_LOG_ERROR, "no streams\n");
2806 ret = AVERROR(EINVAL);
2810 for(i=0;i<s->nb_streams;i++) {
2813 switch (st->codec->codec_type) {
2814 case AVMEDIA_TYPE_AUDIO:
2815 if(st->codec->sample_rate<=0){
2816 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2817 ret = AVERROR(EINVAL);
2820 if(!st->codec->block_align)
2821 st->codec->block_align = st->codec->channels *
2822 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2824 case AVMEDIA_TYPE_VIDEO:
2825 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2826 av_log(s, AV_LOG_ERROR, "time base not set\n");
2827 ret = AVERROR(EINVAL);
2830 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2831 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2832 ret = AVERROR(EINVAL);
2835 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2836 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
2837 "(%d/%d) and encoder layer (%d/%d)\n",
2838 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
2839 st->codec->sample_aspect_ratio.num,
2840 st->codec->sample_aspect_ratio.den);
2841 ret = AVERROR(EINVAL);
2847 if(s->oformat->codec_tag){
2848 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)){
2849 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2850 st->codec->codec_tag= 0;
2852 if(st->codec->codec_tag){
2853 if (!validate_codec_tag(s, st)) {
2855 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2856 av_log(s, AV_LOG_ERROR,
2857 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2858 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2859 ret = AVERROR_INVALIDDATA;
2863 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2866 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2867 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2868 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2871 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2872 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2873 if (!s->priv_data) {
2874 ret = AVERROR(ENOMEM);
2877 if (s->oformat->priv_class) {
2878 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2879 av_opt_set_defaults(s->priv_data);
2880 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2885 /* set muxer identification string */
2886 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2887 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2890 if(s->oformat->write_header){
2891 ret = s->oformat->write_header(s);
2896 /* init PTS generation */
2897 for(i=0;i<s->nb_streams;i++) {
2898 int64_t den = AV_NOPTS_VALUE;
2901 switch (st->codec->codec_type) {
2902 case AVMEDIA_TYPE_AUDIO:
2903 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2905 case AVMEDIA_TYPE_VIDEO:
2906 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2911 if (den != AV_NOPTS_VALUE) {
2913 ret = AVERROR_INVALIDDATA;
2916 frac_init(&st->pts, 0, 0, den);
2921 av_dict_free(options);
2930 //FIXME merge with compute_pkt_fields
2931 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2932 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2933 int num, den, frame_size, i;
2935 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2936 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2938 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2939 return AVERROR(EINVAL);*/
2941 /* duration field */
2942 if (pkt->duration == 0) {
2943 compute_frame_duration(&num, &den, st, NULL, pkt);
2945 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2949 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2952 //XXX/FIXME this is a temporary hack until all encoders output pts
2953 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2955 // pkt->pts= st->cur_dts;
2956 pkt->pts= st->pts.val;
2959 //calculate dts from pts
2960 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2961 st->pts_buffer[0]= pkt->pts;
2962 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2963 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2964 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2965 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2967 pkt->dts= st->pts_buffer[0];
2970 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2971 av_log(s, AV_LOG_ERROR,
2972 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2973 st->index, st->cur_dts, pkt->dts);
2974 return AVERROR(EINVAL);
2976 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2977 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2978 return AVERROR(EINVAL);
2981 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2982 st->cur_dts= pkt->dts;
2983 st->pts.val= pkt->dts;
2986 switch (st->codec->codec_type) {
2987 case AVMEDIA_TYPE_AUDIO:
2988 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
2990 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2991 likely equal to the encoder delay, but it would be better if we
2992 had the real timestamps from the encoder */
2993 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2994 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2997 case AVMEDIA_TYPE_VIDEO:
2998 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3006 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3011 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3012 return s->oformat->write_packet(s, pkt);
3016 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3018 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3021 ret= s->oformat->write_packet(s, pkt);
3024 s->streams[pkt->stream_index]->nb_frames++;
3028 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3029 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3031 AVPacketList **next_point, *this_pktl;
3033 this_pktl = av_mallocz(sizeof(AVPacketList));
3034 this_pktl->pkt= *pkt;
3035 pkt->destruct= NULL; // do not free original but only the copy
3036 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3038 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3039 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3041 next_point = &s->packet_buffer;
3044 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3045 while(!compare(s, &(*next_point)->pkt, pkt)){
3046 next_point= &(*next_point)->next;
3050 next_point = &(s->packet_buffer_end->next);
3053 assert(!*next_point);
3055 s->packet_buffer_end= this_pktl;
3058 this_pktl->next= *next_point;
3060 s->streams[pkt->stream_index]->last_in_packet_buffer=
3061 *next_point= this_pktl;
3064 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3066 AVStream *st = s->streams[ pkt ->stream_index];
3067 AVStream *st2= s->streams[ next->stream_index];
3068 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3072 return pkt->stream_index < next->stream_index;
3076 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3082 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3085 for(i=0; i < s->nb_streams; i++)
3086 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3088 if(stream_count && (s->nb_streams == stream_count || flush)){
3089 pktl= s->packet_buffer;
3092 s->packet_buffer= pktl->next;
3093 if(!s->packet_buffer)
3094 s->packet_buffer_end= NULL;
3096 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3097 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3101 av_init_packet(out);
3107 * Interleave an AVPacket correctly so it can be muxed.
3108 * @param out the interleaved packet will be output here
3109 * @param in the input packet
3110 * @param flush 1 if no further packets are available as input and all
3111 * remaining packets should be output
3112 * @return 1 if a packet was output, 0 if no packet could be output,
3113 * < 0 if an error occurred
3115 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3116 if (s->oformat->interleave_packet) {
3117 int ret = s->oformat->interleave_packet(s, out, in, flush);
3122 return av_interleave_packet_per_dts(s, out, in, flush);
3125 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3126 AVStream *st= s->streams[ pkt->stream_index];
3129 //FIXME/XXX/HACK drop zero sized packets
3130 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3133 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3134 pkt->size, pkt->dts, pkt->pts);
3135 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3138 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3139 return AVERROR(EINVAL);
3143 int ret= interleave_packet(s, &opkt, pkt, 0);
3144 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3147 ret= s->oformat->write_packet(s, &opkt);
3149 s->streams[opkt.stream_index]->nb_frames++;
3151 av_free_packet(&opkt);
3159 int av_write_trailer(AVFormatContext *s)
3165 ret= interleave_packet(s, &pkt, NULL, 1);
3166 if(ret<0) //FIXME cleanup needed for ret<0 ?
3171 ret= s->oformat->write_packet(s, &pkt);
3173 s->streams[pkt.stream_index]->nb_frames++;
3175 av_free_packet(&pkt);
3181 if(s->oformat->write_trailer)
3182 ret = s->oformat->write_trailer(s);
3184 for(i=0;i<s->nb_streams;i++) {
3185 av_freep(&s->streams[i]->priv_data);
3186 av_freep(&s->streams[i]->index_entries);
3188 if (s->oformat->priv_class)
3189 av_opt_free(s->priv_data);
3190 av_freep(&s->priv_data);
3194 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3197 AVProgram *program=NULL;
3200 if (idx >= ac->nb_streams) {
3201 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3205 for(i=0; i<ac->nb_programs; i++){
3206 if(ac->programs[i]->id != progid)
3208 program = ac->programs[i];
3209 for(j=0; j<program->nb_stream_indexes; j++)
3210 if(program->stream_index[j] == idx)
3213 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3216 program->stream_index = tmp;
3217 program->stream_index[program->nb_stream_indexes++] = idx;
3222 static void print_fps(double d, const char *postfix){
3223 uint64_t v= lrintf(d*100);
3224 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3225 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3226 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3229 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3231 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3232 AVDictionaryEntry *tag=NULL;
3234 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3235 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3236 if(strcmp("language", tag->key))
3237 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3242 /* "user interface" functions */
3243 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3246 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3247 AVStream *st = ic->streams[i];
3248 int g = av_gcd(st->time_base.num, st->time_base.den);
3249 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3250 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3251 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3252 /* the pid is an important information, so we display it */
3253 /* XXX: add a generic system */
3254 if (flags & AVFMT_SHOW_IDS)
3255 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3257 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3258 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3259 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3260 if (st->sample_aspect_ratio.num && // default
3261 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3262 AVRational display_aspect_ratio;
3263 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3264 st->codec->width*st->sample_aspect_ratio.num,
3265 st->codec->height*st->sample_aspect_ratio.den,
3267 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3268 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3269 display_aspect_ratio.num, display_aspect_ratio.den);
3271 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3272 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3273 print_fps(av_q2d(st->avg_frame_rate), "fps");
3274 if(st->r_frame_rate.den && st->r_frame_rate.num)
3275 print_fps(av_q2d(st->r_frame_rate), "tbr");
3276 if(st->time_base.den && st->time_base.num)
3277 print_fps(1/av_q2d(st->time_base), "tbn");
3278 if(st->codec->time_base.den && st->codec->time_base.num)
3279 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3281 if (st->disposition & AV_DISPOSITION_DEFAULT)
3282 av_log(NULL, AV_LOG_INFO, " (default)");
3283 if (st->disposition & AV_DISPOSITION_DUB)
3284 av_log(NULL, AV_LOG_INFO, " (dub)");
3285 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3286 av_log(NULL, AV_LOG_INFO, " (original)");
3287 if (st->disposition & AV_DISPOSITION_COMMENT)
3288 av_log(NULL, AV_LOG_INFO, " (comment)");
3289 if (st->disposition & AV_DISPOSITION_LYRICS)
3290 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3291 if (st->disposition & AV_DISPOSITION_KARAOKE)
3292 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3293 if (st->disposition & AV_DISPOSITION_FORCED)
3294 av_log(NULL, AV_LOG_INFO, " (forced)");
3295 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3296 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3297 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3298 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3299 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3300 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3301 av_log(NULL, AV_LOG_INFO, "\n");
3302 dump_metadata(NULL, st->metadata, " ");
3305 void av_dump_format(AVFormatContext *ic,
3311 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3312 if (ic->nb_streams && !printed)
3315 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3316 is_output ? "Output" : "Input",
3318 is_output ? ic->oformat->name : ic->iformat->name,
3319 is_output ? "to" : "from", url);
3320 dump_metadata(NULL, ic->metadata, " ");
3322 av_log(NULL, AV_LOG_INFO, " Duration: ");
3323 if (ic->duration != AV_NOPTS_VALUE) {
3324 int hours, mins, secs, us;
3325 secs = ic->duration / AV_TIME_BASE;
3326 us = ic->duration % AV_TIME_BASE;
3331 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3332 (100 * us) / AV_TIME_BASE);
3334 av_log(NULL, AV_LOG_INFO, "N/A");
3336 if (ic->start_time != AV_NOPTS_VALUE) {
3338 av_log(NULL, AV_LOG_INFO, ", start: ");
3339 secs = ic->start_time / AV_TIME_BASE;
3340 us = abs(ic->start_time % AV_TIME_BASE);
3341 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3342 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3344 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3346 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3348 av_log(NULL, AV_LOG_INFO, "N/A");
3350 av_log(NULL, AV_LOG_INFO, "\n");
3352 for (i = 0; i < ic->nb_chapters; i++) {
3353 AVChapter *ch = ic->chapters[i];
3354 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3355 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3356 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3358 dump_metadata(NULL, ch->metadata, " ");
3360 if(ic->nb_programs) {
3361 int j, k, total = 0;
3362 for(j=0; j<ic->nb_programs; j++) {
3363 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3365 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3366 name ? name->value : "");
3367 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3368 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3369 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3370 printed[ic->programs[j]->stream_index[k]] = 1;
3372 total += ic->programs[j]->nb_stream_indexes;
3374 if (total < ic->nb_streams)
3375 av_log(NULL, AV_LOG_INFO, " No Program\n");
3377 for(i=0;i<ic->nb_streams;i++)
3379 dump_stream_format(ic, i, index, is_output);
3384 int64_t av_gettime(void)
3387 gettimeofday(&tv,NULL);
3388 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3391 uint64_t ff_ntp_time(void)
3393 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3396 int av_get_frame_filename(char *buf, int buf_size,
3397 const char *path, int number)
3400 char *q, buf1[20], c;
3401 int nd, len, percentd_found;
3413 while (isdigit(*p)) {
3414 nd = nd * 10 + *p++ - '0';
3417 } while (isdigit(c));
3426 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3428 if ((q - buf + len) > buf_size - 1)
3430 memcpy(q, buf1, len);
3438 if ((q - buf) < buf_size - 1)
3442 if (!percentd_found)
3451 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3455 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3457 for(i=0;i<size;i+=16) {
3464 PRINT(" %02x", buf[i+j]);
3469 for(j=0;j<len;j++) {
3471 if (c < ' ' || c > '~')
3480 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3482 hex_dump_internal(NULL, f, 0, buf, size);
3485 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3487 hex_dump_internal(avcl, NULL, level, buf, size);
3490 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3493 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3494 PRINT("stream #%d:\n", pkt->stream_index);
3495 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3496 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3497 /* DTS is _always_ valid after av_read_frame() */
3499 if (pkt->dts == AV_NOPTS_VALUE)
3502 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3503 /* PTS may not be known if B-frames are present. */
3505 if (pkt->pts == AV_NOPTS_VALUE)
3508 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3510 PRINT(" size=%d\n", pkt->size);
3513 av_hex_dump(f, pkt->data, pkt->size);
3516 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3518 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3521 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3524 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3527 void av_url_split(char *proto, int proto_size,
3528 char *authorization, int authorization_size,
3529 char *hostname, int hostname_size,
3531 char *path, int path_size,
3534 const char *p, *ls, *at, *col, *brk;
3536 if (port_ptr) *port_ptr = -1;
3537 if (proto_size > 0) proto[0] = 0;
3538 if (authorization_size > 0) authorization[0] = 0;
3539 if (hostname_size > 0) hostname[0] = 0;
3540 if (path_size > 0) path[0] = 0;
3542 /* parse protocol */
3543 if ((p = strchr(url, ':'))) {
3544 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3549 /* no protocol means plain filename */
3550 av_strlcpy(path, url, path_size);
3554 /* separate path from hostname */
3555 ls = strchr(p, '/');
3557 ls = strchr(p, '?');
3559 av_strlcpy(path, ls, path_size);
3561 ls = &p[strlen(p)]; // XXX
3563 /* the rest is hostname, use that to parse auth/port */
3565 /* authorization (user[:pass]@hostname) */
3566 if ((at = strchr(p, '@')) && at < ls) {
3567 av_strlcpy(authorization, p,
3568 FFMIN(authorization_size, at + 1 - p));
3569 p = at + 1; /* skip '@' */
3572 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3574 av_strlcpy(hostname, p + 1,
3575 FFMIN(hostname_size, brk - p));
3576 if (brk[1] == ':' && port_ptr)
3577 *port_ptr = atoi(brk + 2);
3578 } else if ((col = strchr(p, ':')) && col < ls) {
3579 av_strlcpy(hostname, p,
3580 FFMIN(col + 1 - p, hostname_size));
3581 if (port_ptr) *port_ptr = atoi(col + 1);
3583 av_strlcpy(hostname, p,
3584 FFMIN(ls + 1 - p, hostname_size));
3588 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3591 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3594 'C', 'D', 'E', 'F' };
3595 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3598 'c', 'd', 'e', 'f' };
3599 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3601 for(i = 0; i < s; i++) {
3602 buff[i * 2] = hex_table[src[i] >> 4];
3603 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3609 int ff_hex_to_data(uint8_t *data, const char *p)
3616 p += strspn(p, SPACE_CHARS);
3619 c = toupper((unsigned char) *p++);
3620 if (c >= '0' && c <= '9')
3622 else if (c >= 'A' && c <= 'F')
3637 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3638 unsigned int pts_num, unsigned int pts_den)
3641 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3642 if(new_tb.num != pts_num)
3643 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3645 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3647 if(new_tb.num <= 0 || new_tb.den <= 0) {
3648 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3651 s->time_base = new_tb;
3652 s->pts_wrap_bits = pts_wrap_bits;
3655 int ff_url_join(char *str, int size, const char *proto,
3656 const char *authorization, const char *hostname,
3657 int port, const char *fmt, ...)
3660 struct addrinfo hints, *ai;
3665 av_strlcatf(str, size, "%s://", proto);
3666 if (authorization && authorization[0])
3667 av_strlcatf(str, size, "%s@", authorization);
3668 #if CONFIG_NETWORK && defined(AF_INET6)
3669 /* Determine if hostname is a numerical IPv6 address,
3670 * properly escape it within [] in that case. */
3671 memset(&hints, 0, sizeof(hints));
3672 hints.ai_flags = AI_NUMERICHOST;
3673 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3674 if (ai->ai_family == AF_INET6) {
3675 av_strlcat(str, "[", size);
3676 av_strlcat(str, hostname, size);
3677 av_strlcat(str, "]", size);
3679 av_strlcat(str, hostname, size);
3684 /* Not an IPv6 address, just output the plain string. */
3685 av_strlcat(str, hostname, size);
3688 av_strlcatf(str, size, ":%d", port);
3691 int len = strlen(str);
3694 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3700 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3701 AVFormatContext *src)
3706 local_pkt.stream_index = dst_stream;
3707 if (pkt->pts != AV_NOPTS_VALUE)
3708 local_pkt.pts = av_rescale_q(pkt->pts,
3709 src->streams[pkt->stream_index]->time_base,
3710 dst->streams[dst_stream]->time_base);
3711 if (pkt->dts != AV_NOPTS_VALUE)
3712 local_pkt.dts = av_rescale_q(pkt->dts,
3713 src->streams[pkt->stream_index]->time_base,
3714 dst->streams[dst_stream]->time_base);
3715 return av_write_frame(dst, &local_pkt);
3718 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3721 const char *ptr = str;
3723 /* Parse key=value pairs. */
3726 char *dest = NULL, *dest_end;
3727 int key_len, dest_len = 0;
3729 /* Skip whitespace and potential commas. */
3730 while (*ptr && (isspace(*ptr) || *ptr == ','))
3737 if (!(ptr = strchr(key, '=')))
3740 key_len = ptr - key;
3742 callback_get_buf(context, key, key_len, &dest, &dest_len);
3743 dest_end = dest + dest_len - 1;
3747 while (*ptr && *ptr != '\"') {
3751 if (dest && dest < dest_end)
3755 if (dest && dest < dest_end)
3763 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3764 if (dest && dest < dest_end)
3772 int ff_find_stream_index(AVFormatContext *s, int id)
3775 for (i = 0; i < s->nb_streams; i++) {
3776 if (s->streams[i]->id == id)
3782 void ff_make_absolute_url(char *buf, int size, const char *base,
3786 /* Absolute path, relative to the current server */
3787 if (base && strstr(base, "://") && rel[0] == '/') {
3789 av_strlcpy(buf, base, size);
3790 sep = strstr(buf, "://");
3793 sep = strchr(sep, '/');
3797 av_strlcat(buf, rel, size);
3800 /* If rel actually is an absolute url, just copy it */
3801 if (!base || strstr(rel, "://") || rel[0] == '/') {
3802 av_strlcpy(buf, rel, size);
3806 av_strlcpy(buf, base, size);
3807 /* Remove the file name from the base url */
3808 sep = strrchr(buf, '/');
3813 while (av_strstart(rel, "../", NULL) && sep) {
3814 /* Remove the path delimiter at the end */
3816 sep = strrchr(buf, '/');
3817 /* If the next directory name to pop off is "..", break here */
3818 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3819 /* Readd the slash we just removed */
3820 av_strlcat(buf, "/", size);
3823 /* Cut off the directory name */
3830 av_strlcat(buf, rel, size);
3833 int64_t ff_iso8601_to_unix_time(const char *datestr)
3836 struct tm time1 = {0}, time2 = {0};
3838 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
3839 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
3841 return av_timegm(&time2);
3843 return av_timegm(&time1);
3845 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3846 "the date string.\n");
3851 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3854 if (ofmt->query_codec)
3855 return ofmt->query_codec(codec_id, std_compliance);
3856 else if (ofmt->codec_tag)
3857 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3858 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3859 codec_id == ofmt->subtitle_codec)
3862 return AVERROR_PATCHWELCOME;
3865 int avformat_network_init(void)
3869 ff_network_inited_globally = 1;
3870 if ((ret = ff_network_init()) < 0)
3877 int avformat_network_deinit(void)
3886 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3887 uint64_t channel_layout, int32_t sample_rate,
3888 int32_t width, int32_t height)
3894 return AVERROR(EINVAL);
3897 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3899 if (channel_layout) {
3901 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3905 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3907 if (width || height) {
3909 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3911 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3913 return AVERROR(ENOMEM);
3914 bytestream_put_le32(&data, flags);
3916 bytestream_put_le32(&data, channels);
3918 bytestream_put_le64(&data, channel_layout);
3920 bytestream_put_le32(&data, sample_rate);
3921 if (width || height) {
3922 bytestream_put_le32(&data, width);
3923 bytestream_put_le32(&data, height);
3928 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3930 return ff_codec_bmp_tags;
3932 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3934 return ff_codec_wav_tags;