2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(0, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
299 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
300 int id3len = ff_id3v2_tag_len(lpd.buf);
301 if (lpd.buf_size > id3len + 16) {
303 lpd.buf_size -= id3len;
309 while ((fmt1 = av_iformat_next(fmt1))) {
310 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
313 if (fmt1->read_probe) {
314 score = fmt1->read_probe(&lpd);
315 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
316 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
317 } else if (fmt1->extensions) {
318 if (av_match_ext(lpd.filename, fmt1->extensions)) {
322 if (score > score_max) {
325 }else if (score == score_max)
328 *score_ret= score_max;
333 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
336 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
337 if(score_ret > *score_max){
338 *score_max= score_ret;
344 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
346 return av_probe_input_format2(pd, is_opened, &score);
349 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
351 static const struct {
352 const char *name; enum AVCodecID id; enum AVMediaType type;
354 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
355 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
356 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
357 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
358 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
359 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
360 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
361 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
362 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
366 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
368 if (fmt && st->request_probe <= score) {
370 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
371 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
372 for (i = 0; fmt_id_type[i].name; i++) {
373 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
374 st->codec->codec_id = fmt_id_type[i].id;
375 st->codec->codec_type = fmt_id_type[i].type;
383 /************************************************************/
384 /* input media file */
386 int av_demuxer_open(AVFormatContext *ic){
389 if (ic->iformat->read_header) {
390 err = ic->iformat->read_header(ic);
395 if (ic->pb && !ic->data_offset)
396 ic->data_offset = avio_tell(ic->pb);
402 /** size of probe buffer, for guessing file type from file contents */
403 #define PROBE_BUF_MIN 2048
404 #define PROBE_BUF_MAX (1<<20)
406 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
407 const char *filename, void *logctx,
408 unsigned int offset, unsigned int max_probe_size)
410 AVProbeData pd = { filename ? filename : "", NULL, -offset };
411 unsigned char *buf = NULL;
412 int ret = 0, probe_size;
414 if (!max_probe_size) {
415 max_probe_size = PROBE_BUF_MAX;
416 } else if (max_probe_size > PROBE_BUF_MAX) {
417 max_probe_size = PROBE_BUF_MAX;
418 } else if (max_probe_size < PROBE_BUF_MIN) {
419 return AVERROR(EINVAL);
422 if (offset >= max_probe_size) {
423 return AVERROR(EINVAL);
426 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
427 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
428 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
429 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
432 if (probe_size < offset) {
436 /* read probe data */
437 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
440 return AVERROR(ENOMEM);
443 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
444 /* fail if error was not end of file, otherwise, lower score */
445 if (ret != AVERROR_EOF) {
450 ret = 0; /* error was end of file, nothing read */
453 pd.buf = &buf[offset];
455 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
457 /* guess file format */
458 *fmt = av_probe_input_format2(&pd, 1, &score);
460 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
461 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
463 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
469 return AVERROR_INVALIDDATA;
472 /* rewind. reuse probe buffer to avoid seeking */
473 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
478 /* open input file and probe the format if necessary */
479 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
482 AVProbeData pd = {filename, NULL, 0};
483 int score = AVPROBE_SCORE_RETRY;
486 s->flags |= AVFMT_FLAG_CUSTOM_IO;
488 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
489 else if (s->iformat->flags & AVFMT_NOFILE)
490 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
491 "will be ignored with AVFMT_NOFILE format.\n");
495 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
496 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
499 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
500 &s->interrupt_callback, options)) < 0)
504 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
507 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
508 AVPacketList **plast_pktl){
509 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
514 (*plast_pktl)->next = pktl;
516 *packet_buffer = pktl;
518 /* add the packet in the buffered packet list */
524 void avformat_queue_attached_pictures(AVFormatContext *s)
527 for (i = 0; i < s->nb_streams; i++)
528 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
529 s->streams[i]->discard < AVDISCARD_ALL) {
530 AVPacket copy = s->streams[i]->attached_pic;
531 copy.destruct = NULL;
532 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
536 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
538 AVFormatContext *s = *ps;
540 AVDictionary *tmp = NULL;
541 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
543 if (!s && !(s = avformat_alloc_context()))
544 return AVERROR(ENOMEM);
546 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
547 return AVERROR(EINVAL);
553 av_dict_copy(&tmp, *options, 0);
555 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
558 if ((ret = init_input(s, filename, &tmp)) < 0)
561 /* check filename in case an image number is expected */
562 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
563 if (!av_filename_number_test(filename)) {
564 ret = AVERROR(EINVAL);
569 s->duration = s->start_time = AV_NOPTS_VALUE;
570 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
572 /* allocate private data */
573 if (s->iformat->priv_data_size > 0) {
574 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
575 ret = AVERROR(ENOMEM);
578 if (s->iformat->priv_class) {
579 *(const AVClass**)s->priv_data = s->iformat->priv_class;
580 av_opt_set_defaults(s->priv_data);
581 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
586 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
588 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
590 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
591 if ((ret = s->iformat->read_header(s)) < 0)
594 if (id3v2_extra_meta) {
595 if (!strcmp(s->iformat->name, "mp3")) {
596 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
599 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
601 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
603 avformat_queue_attached_pictures(s);
605 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
606 s->data_offset = avio_tell(s->pb);
608 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
611 av_dict_free(options);
618 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
620 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
622 avformat_free_context(s);
627 /*******************************************************/
629 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
631 if(st->request_probe>0){
632 AVProbeData *pd = &st->probe_data;
634 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
638 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
642 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
643 pd->buf_size += pkt->size;
644 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
647 st->probe_packets = 0;
649 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
654 end= s->raw_packet_buffer_remaining_size <= 0
655 || st->probe_packets<=0;
657 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
658 int score= set_codec_from_probe_data(s, st, pd);
659 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
663 st->request_probe= -1;
664 if(st->codec->codec_id != AV_CODEC_ID_NONE){
665 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
667 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
673 static void force_codec_ids(AVFormatContext *s, AVStream *st)
675 switch(st->codec->codec_type){
676 case AVMEDIA_TYPE_VIDEO:
677 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
679 case AVMEDIA_TYPE_AUDIO:
680 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
682 case AVMEDIA_TYPE_SUBTITLE:
683 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
688 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
694 AVPacketList *pktl = s->raw_packet_buffer;
698 st = s->streams[pkt->stream_index];
699 if(st->request_probe <= 0){
700 s->raw_packet_buffer = pktl->next;
701 s->raw_packet_buffer_remaining_size += pkt->size;
710 ret= s->iformat->read_packet(s, pkt);
712 if (!pktl || ret == AVERROR(EAGAIN))
714 for (i = 0; i < s->nb_streams; i++) {
716 if (st->probe_packets) {
717 probe_codec(s, st, NULL);
719 av_assert0(st->request_probe <= 0);
724 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
725 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
726 av_log(s, AV_LOG_WARNING,
727 "Dropped corrupted packet (stream = %d)\n",
733 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
734 av_packet_merge_side_data(pkt);
736 if(pkt->stream_index >= (unsigned)s->nb_streams){
737 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
741 st= s->streams[pkt->stream_index];
743 force_codec_ids(s, st);
745 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
746 if (s->use_wallclock_as_timestamps)
747 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
749 if(!pktl && st->request_probe <= 0)
752 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
753 s->raw_packet_buffer_remaining_size -= pkt->size;
755 probe_codec(s, st, pkt);
759 #if FF_API_READ_PACKET
760 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
762 return ff_read_packet(s, pkt);
767 /**********************************************************/
769 static int determinable_frame_size(AVCodecContext *avctx)
771 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
772 avctx->codec_id == AV_CODEC_ID_MP1 ||
773 avctx->codec_id == AV_CODEC_ID_MP2 ||
774 avctx->codec_id == AV_CODEC_ID_MP3/* ||
775 avctx->codec_id == AV_CODEC_ID_CELT*/)
781 * Get the number of samples of an audio frame. Return -1 on error.
783 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
787 /* give frame_size priority if demuxing */
788 if (!mux && enc->frame_size > 1)
789 return enc->frame_size;
791 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
794 /* fallback to using frame_size if muxing */
795 if (enc->frame_size > 1)
796 return enc->frame_size;
803 * Return the frame duration in seconds. Return 0 if not available.
805 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
806 AVCodecParserContext *pc, AVPacket *pkt)
812 switch(st->codec->codec_type) {
813 case AVMEDIA_TYPE_VIDEO:
814 if (st->r_frame_rate.num && !pc) {
815 *pnum = st->r_frame_rate.den;
816 *pden = st->r_frame_rate.num;
817 } else if(st->time_base.num*1000LL > st->time_base.den) {
818 *pnum = st->time_base.num;
819 *pden = st->time_base.den;
820 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
821 *pnum = st->codec->time_base.num;
822 *pden = st->codec->time_base.den;
823 if (pc && pc->repeat_pict) {
824 *pnum = (*pnum) * (1 + pc->repeat_pict);
826 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
827 //Thus if we have no parser in such case leave duration undefined.
828 if(st->codec->ticks_per_frame>1 && !pc){
833 case AVMEDIA_TYPE_AUDIO:
834 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
835 if (frame_size <= 0 || st->codec->sample_rate <= 0)
838 *pden = st->codec->sample_rate;
845 static int is_intra_only(AVCodecContext *enc){
846 const AVCodecDescriptor *desc;
848 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
851 desc = av_codec_get_codec_descriptor(enc);
853 desc = avcodec_descriptor_get(enc->codec_id);
854 av_codec_set_codec_descriptor(enc, desc);
857 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
861 static int has_decode_delay_been_guessed(AVStream *st)
863 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
864 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
866 #if CONFIG_H264_DECODER
867 if(st->codec->has_b_frames &&
868 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
871 if(st->codec->has_b_frames<3)
872 return st->nb_decoded_frames >= 7;
873 else if(st->codec->has_b_frames<4)
874 return st->nb_decoded_frames >= 18;
876 return st->nb_decoded_frames >= 20;
879 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
883 if (pktl == s->parse_queue_end)
884 return s->packet_buffer;
888 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
889 int64_t dts, int64_t pts)
891 AVStream *st= s->streams[stream_index];
892 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
893 int64_t pts_buffer[MAX_REORDER_DELAY+1];
897 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
900 delay = st->codec->has_b_frames;
901 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
903 shift = st->first_dts - RELATIVE_TS_BASE;
905 for (i=0; i<MAX_REORDER_DELAY+1; i++)
906 pts_buffer[i] = AV_NOPTS_VALUE;
908 if (is_relative(pts))
911 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
912 if(pktl->pkt.stream_index != stream_index)
914 if(is_relative(pktl->pkt.pts))
915 pktl->pkt.pts += shift;
917 if(is_relative(pktl->pkt.dts))
918 pktl->pkt.dts += shift;
920 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
921 st->start_time= pktl->pkt.pts;
923 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
924 pts_buffer[0]= pktl->pkt.pts;
925 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
926 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
927 if(pktl->pkt.dts == AV_NOPTS_VALUE)
928 pktl->pkt.dts= pts_buffer[0];
931 if (st->start_time == AV_NOPTS_VALUE)
932 st->start_time = pts;
935 static void update_initial_durations(AVFormatContext *s, AVStream *st,
936 int stream_index, int duration)
938 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
939 int64_t cur_dts= RELATIVE_TS_BASE;
941 if(st->first_dts != AV_NOPTS_VALUE){
942 cur_dts= st->first_dts;
943 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
944 if(pktl->pkt.stream_index == stream_index){
945 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
950 if(pktl && pktl->pkt.dts != st->first_dts) {
951 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in que\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
955 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
958 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
959 st->first_dts = cur_dts;
960 }else if(st->cur_dts != RELATIVE_TS_BASE)
963 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
964 if(pktl->pkt.stream_index != stream_index)
966 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
967 && !pktl->pkt.duration){
968 pktl->pkt.dts= cur_dts;
969 if(!st->codec->has_b_frames)
970 pktl->pkt.pts= cur_dts;
971 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
972 pktl->pkt.duration = duration;
975 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
978 st->cur_dts= cur_dts;
981 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
982 AVCodecParserContext *pc, AVPacket *pkt)
984 int num, den, presentation_delayed, delay, i;
987 if (s->flags & AVFMT_FLAG_NOFILLIN)
990 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
991 pkt->dts= AV_NOPTS_VALUE;
993 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
994 //FIXME Set low_delay = 0 when has_b_frames = 1
995 st->codec->has_b_frames = 1;
997 /* do we have a video B-frame ? */
998 delay= st->codec->has_b_frames;
999 presentation_delayed = 0;
1001 /* XXX: need has_b_frame, but cannot get it if the codec is
1004 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1005 presentation_delayed = 1;
1007 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && st->pts_wrap_bits<63 && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts){
1008 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1009 pkt->dts -= 1LL<<st->pts_wrap_bits;
1011 pkt->pts += 1LL<<st->pts_wrap_bits;
1014 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1015 // we take the conservative approach and discard both
1016 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1017 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1018 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1019 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1020 pkt->dts= AV_NOPTS_VALUE;
1023 if (pkt->duration == 0) {
1024 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1026 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1029 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1030 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1032 /* correct timestamps with byte offset if demuxers only have timestamps
1033 on packet boundaries */
1034 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1035 /* this will estimate bitrate based on this frame's duration and size */
1036 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1037 if(pkt->pts != AV_NOPTS_VALUE)
1039 if(pkt->dts != AV_NOPTS_VALUE)
1043 if (pc && pc->dts_sync_point >= 0) {
1044 // we have synchronization info from the parser
1045 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1047 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1048 if (pkt->dts != AV_NOPTS_VALUE) {
1049 // got DTS from the stream, update reference timestamp
1050 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1051 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1052 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1053 // compute DTS based on reference timestamp
1054 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1055 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1057 if (pc->dts_sync_point > 0)
1058 st->reference_dts = pkt->dts; // new reference
1062 /* This may be redundant, but it should not hurt. */
1063 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1064 presentation_delayed = 1;
1066 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1067 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1068 /* interpolate PTS and DTS if they are not present */
1069 //We skip H264 currently because delay and has_b_frames are not reliably set
1070 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1071 if (presentation_delayed) {
1072 /* DTS = decompression timestamp */
1073 /* PTS = presentation timestamp */
1074 if (pkt->dts == AV_NOPTS_VALUE)
1075 pkt->dts = st->last_IP_pts;
1076 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1077 if (pkt->dts == AV_NOPTS_VALUE)
1078 pkt->dts = st->cur_dts;
1080 /* this is tricky: the dts must be incremented by the duration
1081 of the frame we are displaying, i.e. the last I- or P-frame */
1082 if (st->last_IP_duration == 0)
1083 st->last_IP_duration = pkt->duration;
1084 if(pkt->dts != AV_NOPTS_VALUE)
1085 st->cur_dts = pkt->dts + st->last_IP_duration;
1086 st->last_IP_duration = pkt->duration;
1087 st->last_IP_pts= pkt->pts;
1088 /* cannot compute PTS if not present (we can compute it only
1089 by knowing the future */
1090 } else if (pkt->pts != AV_NOPTS_VALUE ||
1091 pkt->dts != AV_NOPTS_VALUE ||
1093 int duration = pkt->duration;
1095 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1096 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1097 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1098 if( old_diff < new_diff && old_diff < (duration>>3)
1099 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1100 && (!strcmp(s->iformat->name, "mpeg") ||
1101 !strcmp(s->iformat->name, "mpegts"))){
1102 pkt->pts += duration;
1103 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1104 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1105 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1109 /* presentation is not delayed : PTS and DTS are the same */
1110 if (pkt->pts == AV_NOPTS_VALUE)
1111 pkt->pts = pkt->dts;
1112 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1114 if (pkt->pts == AV_NOPTS_VALUE)
1115 pkt->pts = st->cur_dts;
1116 pkt->dts = pkt->pts;
1117 if (pkt->pts != AV_NOPTS_VALUE)
1118 st->cur_dts = pkt->pts + duration;
1122 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1123 st->pts_buffer[0]= pkt->pts;
1124 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1125 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1126 if(pkt->dts == AV_NOPTS_VALUE)
1127 pkt->dts= st->pts_buffer[0];
1129 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1130 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1132 if(pkt->dts > st->cur_dts)
1133 st->cur_dts = pkt->dts;
1135 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1136 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1139 if (is_intra_only(st->codec))
1140 pkt->flags |= AV_PKT_FLAG_KEY;
1142 pkt->convergence_duration = pc->convergence_duration;
1145 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1148 AVPacketList *pktl = *pkt_buf;
1149 *pkt_buf = pktl->next;
1150 av_free_packet(&pktl->pkt);
1153 *pkt_buf_end = NULL;
1157 * Parse a packet, add all split parts to parse_queue
1159 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1161 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1163 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1164 AVStream *st = s->streams[stream_index];
1165 uint8_t *data = pkt ? pkt->data : NULL;
1166 int size = pkt ? pkt->size : 0;
1167 int ret = 0, got_output = 0;
1170 av_init_packet(&flush_pkt);
1173 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1174 // preserve 0-size sync packets
1175 compute_pkt_fields(s, st, st->parser, pkt);
1178 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1181 av_init_packet(&out_pkt);
1182 len = av_parser_parse2(st->parser, st->codec,
1183 &out_pkt.data, &out_pkt.size, data, size,
1184 pkt->pts, pkt->dts, pkt->pos);
1186 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1188 /* increment read pointer */
1192 got_output = !!out_pkt.size;
1197 /* set the duration */
1198 out_pkt.duration = 0;
1199 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1200 if (st->codec->sample_rate > 0) {
1201 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1202 (AVRational){ 1, st->codec->sample_rate },
1206 } else if (st->codec->time_base.num != 0 &&
1207 st->codec->time_base.den != 0) {
1208 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1209 st->codec->time_base,
1214 out_pkt.stream_index = st->index;
1215 out_pkt.pts = st->parser->pts;
1216 out_pkt.dts = st->parser->dts;
1217 out_pkt.pos = st->parser->pos;
1219 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1220 out_pkt.pos = st->parser->frame_offset;
1222 if (st->parser->key_frame == 1 ||
1223 (st->parser->key_frame == -1 &&
1224 st->parser->pict_type == AV_PICTURE_TYPE_I))
1225 out_pkt.flags |= AV_PKT_FLAG_KEY;
1227 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1228 out_pkt.flags |= AV_PKT_FLAG_KEY;
1230 compute_pkt_fields(s, st, st->parser, &out_pkt);
1232 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1233 out_pkt.destruct = pkt->destruct;
1234 pkt->destruct = NULL;
1236 if ((ret = av_dup_packet(&out_pkt)) < 0)
1239 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1240 av_free_packet(&out_pkt);
1241 ret = AVERROR(ENOMEM);
1247 /* end of the stream => close and free the parser */
1248 if (pkt == &flush_pkt) {
1249 av_parser_close(st->parser);
1254 av_free_packet(pkt);
1258 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1259 AVPacketList **pkt_buffer_end,
1263 av_assert0(*pkt_buffer);
1266 *pkt_buffer = pktl->next;
1268 *pkt_buffer_end = NULL;
1273 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1275 int ret = 0, i, got_packet = 0;
1277 av_init_packet(pkt);
1279 while (!got_packet && !s->parse_queue) {
1283 /* read next packet */
1284 ret = ff_read_packet(s, &cur_pkt);
1286 if (ret == AVERROR(EAGAIN))
1288 /* flush the parsers */
1289 for(i = 0; i < s->nb_streams; i++) {
1291 if (st->parser && st->need_parsing)
1292 parse_packet(s, NULL, st->index);
1294 /* all remaining packets are now in parse_queue =>
1295 * really terminate parsing */
1299 st = s->streams[cur_pkt.stream_index];
1301 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1302 cur_pkt.dts != AV_NOPTS_VALUE &&
1303 cur_pkt.pts < cur_pkt.dts) {
1304 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1305 cur_pkt.stream_index,
1306 av_ts2str(cur_pkt.pts),
1307 av_ts2str(cur_pkt.dts),
1310 if (s->debug & FF_FDEBUG_TS)
1311 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1312 cur_pkt.stream_index,
1313 av_ts2str(cur_pkt.pts),
1314 av_ts2str(cur_pkt.dts),
1319 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1320 st->parser = av_parser_init(st->codec->codec_id);
1322 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1323 "%s, packets or times may be invalid.\n",
1324 avcodec_get_name(st->codec->codec_id));
1325 /* no parser available: just output the raw packets */
1326 st->need_parsing = AVSTREAM_PARSE_NONE;
1327 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1328 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1329 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1330 st->parser->flags |= PARSER_FLAG_ONCE;
1331 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1332 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1336 if (!st->need_parsing || !st->parser) {
1337 /* no parsing needed: we just output the packet as is */
1339 compute_pkt_fields(s, st, NULL, pkt);
1340 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1341 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1342 ff_reduce_index(s, st->index);
1343 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1346 } else if (st->discard < AVDISCARD_ALL) {
1347 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1351 av_free_packet(&cur_pkt);
1353 if (pkt->flags & AV_PKT_FLAG_KEY)
1354 st->skip_to_keyframe = 0;
1355 if (st->skip_to_keyframe) {
1356 av_free_packet(&cur_pkt);
1361 if (!got_packet && s->parse_queue)
1362 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1364 if(s->debug & FF_FDEBUG_TS)
1365 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1367 av_ts2str(pkt->pts),
1368 av_ts2str(pkt->dts),
1376 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1378 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1384 ret = s->packet_buffer ?
1385 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1386 read_frame_internal(s, pkt);
1393 AVPacketList *pktl = s->packet_buffer;
1396 AVPacket *next_pkt = &pktl->pkt;
1398 if (next_pkt->dts != AV_NOPTS_VALUE) {
1399 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1400 // last dts seen for this stream. if any of packets following
1401 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1402 int64_t last_dts = next_pkt->dts;
1403 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1404 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1405 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1406 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1407 next_pkt->pts = pktl->pkt.dts;
1409 if (last_dts != AV_NOPTS_VALUE) {
1410 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1411 last_dts = pktl->pkt.dts;
1416 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1417 // Fixing the last reference frame had none pts issue (For MXF etc).
1418 // We only do this when
1420 // 2. we are not able to resolve a pts value for current packet.
1421 // 3. the packets for this stream at the end of the files had valid dts.
1422 next_pkt->pts = last_dts + next_pkt->duration;
1424 pktl = s->packet_buffer;
1427 /* read packet from packet buffer, if there is data */
1428 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1429 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1430 ret = read_from_packet_buffer(&s->packet_buffer,
1431 &s->packet_buffer_end, pkt);
1436 ret = read_frame_internal(s, pkt);
1438 if (pktl && ret != AVERROR(EAGAIN)) {
1445 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1446 &s->packet_buffer_end)) < 0)
1447 return AVERROR(ENOMEM);
1452 st = s->streams[pkt->stream_index];
1453 if (st->skip_samples) {
1454 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1455 AV_WL32(p, st->skip_samples);
1456 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1457 st->skip_samples = 0;
1460 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1461 ff_reduce_index(s, st->index);
1462 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1465 if (is_relative(pkt->dts))
1466 pkt->dts -= RELATIVE_TS_BASE;
1467 if (is_relative(pkt->pts))
1468 pkt->pts -= RELATIVE_TS_BASE;
1473 /* XXX: suppress the packet queue */
1474 static void flush_packet_queue(AVFormatContext *s)
1476 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1477 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1478 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1480 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1483 /*******************************************************/
1486 int av_find_default_stream_index(AVFormatContext *s)
1488 int first_audio_index = -1;
1492 if (s->nb_streams <= 0)
1494 for(i = 0; i < s->nb_streams; i++) {
1496 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1497 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1500 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1501 first_audio_index = i;
1503 return first_audio_index >= 0 ? first_audio_index : 0;
1507 * Flush the frame reader.
1509 void ff_read_frame_flush(AVFormatContext *s)
1514 flush_packet_queue(s);
1516 /* for each stream, reset read state */
1517 for(i = 0; i < s->nb_streams; i++) {
1521 av_parser_close(st->parser);
1524 st->last_IP_pts = AV_NOPTS_VALUE;
1525 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1526 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1527 st->reference_dts = AV_NOPTS_VALUE;
1529 st->probe_packets = MAX_PROBE_PACKETS;
1531 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1532 st->pts_buffer[j]= AV_NOPTS_VALUE;
1536 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1540 for(i = 0; i < s->nb_streams; i++) {
1541 AVStream *st = s->streams[i];
1543 st->cur_dts = av_rescale(timestamp,
1544 st->time_base.den * (int64_t)ref_st->time_base.num,
1545 st->time_base.num * (int64_t)ref_st->time_base.den);
1549 void ff_reduce_index(AVFormatContext *s, int stream_index)
1551 AVStream *st= s->streams[stream_index];
1552 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1554 if((unsigned)st->nb_index_entries >= max_entries){
1556 for(i=0; 2*i<st->nb_index_entries; i++)
1557 st->index_entries[i]= st->index_entries[2*i];
1558 st->nb_index_entries= i;
1562 int ff_add_index_entry(AVIndexEntry **index_entries,
1563 int *nb_index_entries,
1564 unsigned int *index_entries_allocated_size,
1565 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1567 AVIndexEntry *entries, *ie;
1570 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1573 if(timestamp == AV_NOPTS_VALUE)
1574 return AVERROR(EINVAL);
1576 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1577 timestamp -= RELATIVE_TS_BASE;
1579 entries = av_fast_realloc(*index_entries,
1580 index_entries_allocated_size,
1581 (*nb_index_entries + 1) *
1582 sizeof(AVIndexEntry));
1586 *index_entries= entries;
1588 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1591 index= (*nb_index_entries)++;
1592 ie= &entries[index];
1593 assert(index==0 || ie[-1].timestamp < timestamp);
1595 ie= &entries[index];
1596 if(ie->timestamp != timestamp){
1597 if(ie->timestamp <= timestamp)
1599 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1600 (*nb_index_entries)++;
1601 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1602 distance= ie->min_distance;
1606 ie->timestamp = timestamp;
1607 ie->min_distance= distance;
1614 int av_add_index_entry(AVStream *st,
1615 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1617 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1618 &st->index_entries_allocated_size, pos,
1619 timestamp, size, distance, flags);
1622 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1623 int64_t wanted_timestamp, int flags)
1631 //optimize appending index entries at the end
1632 if(b && entries[b-1].timestamp < wanted_timestamp)
1637 timestamp = entries[m].timestamp;
1638 if(timestamp >= wanted_timestamp)
1640 if(timestamp <= wanted_timestamp)
1643 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1645 if(!(flags & AVSEEK_FLAG_ANY)){
1646 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1647 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1656 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1659 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1660 wanted_timestamp, flags);
1663 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1665 AVInputFormat *avif= s->iformat;
1666 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1667 int64_t ts_min, ts_max, ts;
1672 if (stream_index < 0)
1675 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1678 ts_min= AV_NOPTS_VALUE;
1679 pos_limit= -1; //gcc falsely says it may be uninitialized
1681 st= s->streams[stream_index];
1682 if(st->index_entries){
1685 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()
1686 index= FFMAX(index, 0);
1687 e= &st->index_entries[index];
1689 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1691 ts_min= e->timestamp;
1692 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1693 pos_min, av_ts2str(ts_min));
1698 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1699 assert(index < st->nb_index_entries);
1701 e= &st->index_entries[index];
1702 assert(e->timestamp >= target_ts);
1704 ts_max= e->timestamp;
1705 pos_limit= pos_max - e->min_distance;
1706 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1707 pos_max, pos_limit, av_ts2str(ts_max));
1711 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1716 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1719 ff_read_frame_flush(s);
1720 ff_update_cur_dts(s, st, ts);
1725 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1726 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1727 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1728 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1731 int64_t start_pos, filesize;
1734 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1736 if(ts_min == AV_NOPTS_VALUE){
1737 pos_min = s->data_offset;
1738 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1739 if (ts_min == AV_NOPTS_VALUE)
1743 if(ts_min >= target_ts){
1748 if(ts_max == AV_NOPTS_VALUE){
1750 filesize = avio_size(s->pb);
1751 pos_max = filesize - 1;
1754 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1756 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1757 if (ts_max == AV_NOPTS_VALUE)
1761 int64_t tmp_pos= pos_max + 1;
1762 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1763 if(tmp_ts == AV_NOPTS_VALUE)
1767 if(tmp_pos >= filesize)
1773 if(ts_max <= target_ts){
1778 if(ts_min > ts_max){
1780 }else if(ts_min == ts_max){
1785 while (pos_min < pos_limit) {
1786 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1787 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1788 assert(pos_limit <= pos_max);
1791 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1792 // interpolate position (better than dichotomy)
1793 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1794 + pos_min - approximate_keyframe_distance;
1795 }else if(no_change==1){
1796 // bisection, if interpolation failed to change min or max pos last time
1797 pos = (pos_min + pos_limit)>>1;
1799 /* linear search if bisection failed, can only happen if there
1800 are very few or no keyframes between min/max */
1805 else if(pos > pos_limit)
1809 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1814 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1815 pos_min, pos, pos_max,
1816 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1817 pos_limit, start_pos, no_change);
1818 if(ts == AV_NOPTS_VALUE){
1819 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1822 assert(ts != AV_NOPTS_VALUE);
1823 if (target_ts <= ts) {
1824 pos_limit = start_pos - 1;
1828 if (target_ts >= ts) {
1834 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1835 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1838 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1840 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1841 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1842 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1848 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1849 int64_t pos_min, pos_max;
1851 pos_min = s->data_offset;
1852 pos_max = avio_size(s->pb) - 1;
1854 if (pos < pos_min) pos= pos_min;
1855 else if(pos > pos_max) pos= pos_max;
1857 avio_seek(s->pb, pos, SEEK_SET);
1862 static int seek_frame_generic(AVFormatContext *s,
1863 int stream_index, int64_t timestamp, int flags)
1870 st = s->streams[stream_index];
1872 index = av_index_search_timestamp(st, timestamp, flags);
1874 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1877 if(index < 0 || index==st->nb_index_entries-1){
1881 if(st->nb_index_entries){
1882 assert(st->index_entries);
1883 ie= &st->index_entries[st->nb_index_entries-1];
1884 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1886 ff_update_cur_dts(s, st, ie->timestamp);
1888 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1894 read_status = av_read_frame(s, &pkt);
1895 } while (read_status == AVERROR(EAGAIN));
1896 if (read_status < 0)
1898 av_free_packet(&pkt);
1899 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1900 if(pkt.flags & AV_PKT_FLAG_KEY)
1902 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1903 av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
1908 index = av_index_search_timestamp(st, timestamp, flags);
1913 ff_read_frame_flush(s);
1914 if (s->iformat->read_seek){
1915 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1918 ie = &st->index_entries[index];
1919 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1921 ff_update_cur_dts(s, st, ie->timestamp);
1926 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1927 int64_t timestamp, int flags)
1932 if (flags & AVSEEK_FLAG_BYTE) {
1933 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1935 ff_read_frame_flush(s);
1936 return seek_frame_byte(s, stream_index, timestamp, flags);
1939 if(stream_index < 0){
1940 stream_index= av_find_default_stream_index(s);
1941 if(stream_index < 0)
1944 st= s->streams[stream_index];
1945 /* timestamp for default must be expressed in AV_TIME_BASE units */
1946 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1949 /* first, we try the format specific seek */
1950 if (s->iformat->read_seek) {
1951 ff_read_frame_flush(s);
1952 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1959 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1960 ff_read_frame_flush(s);
1961 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1962 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1963 ff_read_frame_flush(s);
1964 return seek_frame_generic(s, stream_index, timestamp, flags);
1970 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1972 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1975 avformat_queue_attached_pictures(s);
1980 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1982 if(min_ts > ts || max_ts < ts)
1985 if (s->iformat->read_seek2) {
1987 ff_read_frame_flush(s);
1988 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1991 avformat_queue_attached_pictures(s);
1995 if(s->iformat->read_timestamp){
1996 //try to seek via read_timestamp()
1999 //Fallback to old API if new is not implemented but old is
2000 //Note the old has somewhat different semantics
2001 if (s->iformat->read_seek || 1) {
2002 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2003 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2004 if (ret<0 && ts != min_ts && max_ts != ts) {
2005 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2007 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2012 // try some generic seek like seek_frame_generic() but with new ts semantics
2015 /*******************************************************/
2018 * Return TRUE if the stream has accurate duration in any stream.
2020 * @return TRUE if the stream has accurate duration for at least one component.
2022 static int has_duration(AVFormatContext *ic)
2027 for(i = 0;i < ic->nb_streams; i++) {
2028 st = ic->streams[i];
2029 if (st->duration != AV_NOPTS_VALUE)
2032 if (ic->duration != AV_NOPTS_VALUE)
2038 * Estimate the stream timings from the one of each components.
2040 * Also computes the global bitrate if possible.
2042 static void update_stream_timings(AVFormatContext *ic)
2044 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2045 int64_t duration, duration1, filesize;
2050 start_time = INT64_MAX;
2051 start_time_text = INT64_MAX;
2052 end_time = INT64_MIN;
2053 duration = INT64_MIN;
2054 for(i = 0;i < ic->nb_streams; i++) {
2055 st = ic->streams[i];
2056 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2057 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2058 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2059 if (start_time1 < start_time_text)
2060 start_time_text = start_time1;
2062 start_time = FFMIN(start_time, start_time1);
2063 end_time1 = AV_NOPTS_VALUE;
2064 if (st->duration != AV_NOPTS_VALUE) {
2065 end_time1 = start_time1
2066 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2067 end_time = FFMAX(end_time, end_time1);
2069 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2070 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2071 p->start_time = start_time1;
2072 if(p->end_time < end_time1)
2073 p->end_time = end_time1;
2076 if (st->duration != AV_NOPTS_VALUE) {
2077 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2078 duration = FFMAX(duration, duration1);
2081 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2082 start_time = start_time_text;
2083 else if(start_time > start_time_text)
2084 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2086 if (start_time != INT64_MAX) {
2087 ic->start_time = start_time;
2088 if (end_time != INT64_MIN) {
2089 if (ic->nb_programs) {
2090 for (i=0; i<ic->nb_programs; i++) {
2091 p = ic->programs[i];
2092 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2093 duration = FFMAX(duration, p->end_time - p->start_time);
2096 duration = FFMAX(duration, end_time - start_time);
2099 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2100 ic->duration = duration;
2102 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2103 /* compute the bitrate */
2104 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2105 (double)ic->duration;
2109 static void fill_all_stream_timings(AVFormatContext *ic)
2114 update_stream_timings(ic);
2115 for(i = 0;i < ic->nb_streams; i++) {
2116 st = ic->streams[i];
2117 if (st->start_time == AV_NOPTS_VALUE) {
2118 if(ic->start_time != AV_NOPTS_VALUE)
2119 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2120 if(ic->duration != AV_NOPTS_VALUE)
2121 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2126 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2128 int64_t filesize, duration;
2132 /* if bit_rate is already set, we believe it */
2133 if (ic->bit_rate <= 0) {
2135 for(i=0;i<ic->nb_streams;i++) {
2136 st = ic->streams[i];
2137 if (st->codec->bit_rate > 0)
2138 bit_rate += st->codec->bit_rate;
2140 ic->bit_rate = bit_rate;
2143 /* if duration is already set, we believe it */
2144 if (ic->duration == AV_NOPTS_VALUE &&
2145 ic->bit_rate != 0) {
2146 filesize = ic->pb ? avio_size(ic->pb) : 0;
2148 for(i = 0; i < ic->nb_streams; i++) {
2149 st = ic->streams[i];
2150 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2151 if (st->duration == AV_NOPTS_VALUE)
2152 st->duration = duration;
2158 #define DURATION_MAX_READ_SIZE 250000
2159 #define DURATION_MAX_RETRY 4
2161 /* only usable for MPEG-PS streams */
2162 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2164 AVPacket pkt1, *pkt = &pkt1;
2166 int read_size, i, ret;
2168 int64_t filesize, offset, duration;
2171 /* flush packet queue */
2172 flush_packet_queue(ic);
2174 for (i=0; i<ic->nb_streams; i++) {
2175 st = ic->streams[i];
2176 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2177 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2180 av_parser_close(st->parser);
2185 /* estimate the end time (duration) */
2186 /* XXX: may need to support wrapping */
2187 filesize = ic->pb ? avio_size(ic->pb) : 0;
2188 end_time = AV_NOPTS_VALUE;
2190 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2194 avio_seek(ic->pb, offset, SEEK_SET);
2197 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2201 ret = ff_read_packet(ic, pkt);
2202 } while(ret == AVERROR(EAGAIN));
2205 read_size += pkt->size;
2206 st = ic->streams[pkt->stream_index];
2207 if (pkt->pts != AV_NOPTS_VALUE &&
2208 (st->start_time != AV_NOPTS_VALUE ||
2209 st->first_dts != AV_NOPTS_VALUE)) {
2210 duration = end_time = pkt->pts;
2211 if (st->start_time != AV_NOPTS_VALUE)
2212 duration -= st->start_time;
2214 duration -= st->first_dts;
2216 duration += 1LL<<st->pts_wrap_bits;
2218 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2219 st->duration = duration;
2222 av_free_packet(pkt);
2224 }while( end_time==AV_NOPTS_VALUE
2225 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2226 && ++retry <= DURATION_MAX_RETRY);
2228 fill_all_stream_timings(ic);
2230 avio_seek(ic->pb, old_offset, SEEK_SET);
2231 for (i=0; i<ic->nb_streams; i++) {
2233 st->cur_dts= st->first_dts;
2234 st->last_IP_pts = AV_NOPTS_VALUE;
2235 st->reference_dts = AV_NOPTS_VALUE;
2239 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2243 /* get the file size, if possible */
2244 if (ic->iformat->flags & AVFMT_NOFILE) {
2247 file_size = avio_size(ic->pb);
2248 file_size = FFMAX(0, file_size);
2251 if ((!strcmp(ic->iformat->name, "mpeg") ||
2252 !strcmp(ic->iformat->name, "mpegts")) &&
2253 file_size && ic->pb->seekable) {
2254 /* get accurate estimate from the PTSes */
2255 estimate_timings_from_pts(ic, old_offset);
2256 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2257 } else if (has_duration(ic)) {
2258 /* at least one component has timings - we use them for all
2260 fill_all_stream_timings(ic);
2261 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2263 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2264 /* less precise: use bitrate info */
2265 estimate_timings_from_bit_rate(ic);
2266 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2268 update_stream_timings(ic);
2272 AVStream av_unused *st;
2273 for(i = 0;i < ic->nb_streams; i++) {
2274 st = ic->streams[i];
2275 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2276 (double) st->start_time / AV_TIME_BASE,
2277 (double) st->duration / AV_TIME_BASE);
2279 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2280 (double) ic->start_time / AV_TIME_BASE,
2281 (double) ic->duration / AV_TIME_BASE,
2282 ic->bit_rate / 1000);
2286 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2288 AVCodecContext *avctx = st->codec;
2290 #define FAIL(errmsg) do { \
2292 *errmsg_ptr = errmsg; \
2296 switch (avctx->codec_type) {
2297 case AVMEDIA_TYPE_AUDIO:
2298 if (!avctx->frame_size && determinable_frame_size(avctx))
2299 FAIL("unspecified frame size");
2300 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2301 FAIL("unspecified sample format");
2302 if (!avctx->sample_rate)
2303 FAIL("unspecified sample rate");
2304 if (!avctx->channels)
2305 FAIL("unspecified number of channels");
2306 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2307 FAIL("no decodable DTS frames");
2309 case AVMEDIA_TYPE_VIDEO:
2311 FAIL("unspecified size");
2312 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2313 FAIL("unspecified pixel format");
2315 case AVMEDIA_TYPE_SUBTITLE:
2316 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2317 FAIL("unspecified size");
2319 case AVMEDIA_TYPE_DATA:
2320 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2323 if (avctx->codec_id == AV_CODEC_ID_NONE)
2324 FAIL("unknown codec");
2328 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2329 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2331 const AVCodec *codec;
2332 int got_picture = 1, ret = 0;
2333 AVFrame *frame = avcodec_alloc_frame();
2334 AVSubtitle subtitle;
2335 AVPacket pkt = *avpkt;
2338 return AVERROR(ENOMEM);
2340 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2341 AVDictionary *thread_opt = NULL;
2343 codec = st->codec->codec ? st->codec->codec :
2344 avcodec_find_decoder(st->codec->codec_id);
2347 st->info->found_decoder = -1;
2352 /* force thread count to 1 since the h264 decoder will not extract SPS
2353 * and PPS to extradata during multi-threaded decoding */
2354 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2355 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2357 av_dict_free(&thread_opt);
2359 st->info->found_decoder = -1;
2362 st->info->found_decoder = 1;
2363 } else if (!st->info->found_decoder)
2364 st->info->found_decoder = 1;
2366 if (st->info->found_decoder < 0) {
2371 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2373 (!has_codec_parameters(st, NULL) ||
2374 !has_decode_delay_been_guessed(st) ||
2375 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2377 avcodec_get_frame_defaults(frame);
2378 switch(st->codec->codec_type) {
2379 case AVMEDIA_TYPE_VIDEO:
2380 ret = avcodec_decode_video2(st->codec, frame,
2381 &got_picture, &pkt);
2383 case AVMEDIA_TYPE_AUDIO:
2384 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2386 case AVMEDIA_TYPE_SUBTITLE:
2387 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2388 &got_picture, &pkt);
2396 st->nb_decoded_frames++;
2403 if(!pkt.data && !got_picture)
2407 avcodec_free_frame(&frame);
2411 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2413 while (tags->id != AV_CODEC_ID_NONE) {
2421 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2424 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2425 if(tag == tags[i].tag)
2428 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2429 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2432 return AV_CODEC_ID_NONE;
2435 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2438 for(i=0; tags && tags[i]; i++){
2439 int tag= ff_codec_get_tag(tags[i], id);
2445 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2448 for(i=0; tags && tags[i]; i++){
2449 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2450 if(id!=AV_CODEC_ID_NONE) return id;
2452 return AV_CODEC_ID_NONE;
2455 static void compute_chapters_end(AVFormatContext *s)
2458 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2460 for (i = 0; i < s->nb_chapters; i++)
2461 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2462 AVChapter *ch = s->chapters[i];
2463 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2466 for (j = 0; j < s->nb_chapters; j++) {
2467 AVChapter *ch1 = s->chapters[j];
2468 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2469 if (j != i && next_start > ch->start && next_start < end)
2472 ch->end = (end == INT64_MAX) ? ch->start : end;
2476 static int get_std_framerate(int i){
2477 if(i<60*12) return (i+1)*1001;
2478 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2482 * Is the time base unreliable.
2483 * This is a heuristic to balance between quick acceptance of the values in
2484 * the headers vs. some extra checks.
2485 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2486 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2487 * And there are "variable" fps files this needs to detect as well.
2489 static int tb_unreliable(AVCodecContext *c){
2490 if( c->time_base.den >= 101L*c->time_base.num
2491 || c->time_base.den < 5L*c->time_base.num
2492 /* || c->codec_tag == AV_RL32("DIVX")
2493 || c->codec_tag == AV_RL32("XVID")*/
2494 || c->codec_tag == AV_RL32("mp4v")
2495 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2496 || c->codec_id == AV_CODEC_ID_H264
2502 #if FF_API_FORMAT_PARAMETERS
2503 int av_find_stream_info(AVFormatContext *ic)
2505 return avformat_find_stream_info(ic, NULL);
2509 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2511 int i, count, ret, read_size, j;
2513 AVPacket pkt1, *pkt;
2514 int64_t old_offset = avio_tell(ic->pb);
2515 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2516 int flush_codecs = ic->probesize > 0;
2519 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2521 for(i=0;i<ic->nb_streams;i++) {
2522 const AVCodec *codec;
2523 AVDictionary *thread_opt = NULL;
2524 st = ic->streams[i];
2526 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2527 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2528 /* if(!st->time_base.num)
2530 if(!st->codec->time_base.num)
2531 st->codec->time_base= st->time_base;
2533 //only for the split stuff
2534 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2535 st->parser = av_parser_init(st->codec->codec_id);
2537 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2538 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2539 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2540 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2542 } else if (st->need_parsing) {
2543 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2544 "%s, packets or times may be invalid.\n",
2545 avcodec_get_name(st->codec->codec_id));
2548 codec = st->codec->codec ? st->codec->codec :
2549 avcodec_find_decoder(st->codec->codec_id);
2551 /* force thread count to 1 since the h264 decoder will not extract SPS
2552 * and PPS to extradata during multi-threaded decoding */
2553 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2555 /* Ensure that subtitle_header is properly set. */
2556 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2557 && codec && !st->codec->codec)
2558 avcodec_open2(st->codec, codec, options ? &options[i]
2561 //try to just open decoders, in case this is enough to get parameters
2562 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2563 if (codec && !st->codec->codec)
2564 avcodec_open2(st->codec, codec, options ? &options[i]
2568 av_dict_free(&thread_opt);
2571 for (i=0; i<ic->nb_streams; i++) {
2572 #if FF_API_R_FRAME_RATE
2573 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2575 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2576 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2582 if (ff_check_interrupt(&ic->interrupt_callback)){
2584 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2588 /* check if one codec still needs to be handled */
2589 for(i=0;i<ic->nb_streams;i++) {
2590 int fps_analyze_framecount = 20;
2592 st = ic->streams[i];
2593 if (!has_codec_parameters(st, NULL))
2595 /* if the timebase is coarse (like the usual millisecond precision
2596 of mkv), we need to analyze more frames to reliably arrive at
2598 if (av_q2d(st->time_base) > 0.0005)
2599 fps_analyze_framecount *= 2;
2600 if (ic->fps_probe_size >= 0)
2601 fps_analyze_framecount = ic->fps_probe_size;
2602 /* variable fps and no guess at the real fps */
2603 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2604 && st->info->duration_count < fps_analyze_framecount
2605 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2607 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2609 if (st->first_dts == AV_NOPTS_VALUE &&
2610 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2611 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2614 if (i == ic->nb_streams) {
2615 /* NOTE: if the format has no header, then we need to read
2616 some packets to get most of the streams, so we cannot
2618 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2619 /* if we found the info for all the codecs, we can stop */
2621 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2626 /* we did not get all the codec info, but we read too much data */
2627 if (read_size >= ic->probesize) {
2629 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2630 for (i = 0; i < ic->nb_streams; i++)
2631 if (!ic->streams[i]->r_frame_rate.num &&
2632 ic->streams[i]->info->duration_count <= 1)
2633 av_log(ic, AV_LOG_WARNING,
2634 "Stream #%d: not enough frames to estimate rate; "
2635 "consider increasing probesize\n", i);
2639 /* NOTE: a new stream can be added there if no header in file
2640 (AVFMTCTX_NOHEADER) */
2641 ret = read_frame_internal(ic, &pkt1);
2642 if (ret == AVERROR(EAGAIN))
2650 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2653 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2654 &ic->packet_buffer_end);
2655 if ((ret = av_dup_packet(pkt)) < 0)
2656 goto find_stream_info_err;
2659 read_size += pkt->size;
2661 st = ic->streams[pkt->stream_index];
2662 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2663 /* check for non-increasing dts */
2664 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2665 st->info->fps_last_dts >= pkt->dts) {
2666 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2667 "packet %d with DTS %"PRId64", packet %d with DTS "
2668 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2669 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2670 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2672 /* check for a discontinuity in dts - if the difference in dts
2673 * is more than 1000 times the average packet duration in the sequence,
2674 * we treat it as a discontinuity */
2675 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2676 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2677 (pkt->dts - st->info->fps_last_dts) / 1000 >
2678 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2679 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2680 "packet %d with DTS %"PRId64", packet %d with DTS "
2681 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2682 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2683 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2686 /* update stored dts values */
2687 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2688 st->info->fps_first_dts = pkt->dts;
2689 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2691 st->info->fps_last_dts = pkt->dts;
2692 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2694 if (st->codec_info_nb_frames>1) {
2696 if (st->time_base.den > 0)
2697 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2698 if (st->avg_frame_rate.num > 0)
2699 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2701 if (t >= ic->max_analyze_duration) {
2702 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2705 if (pkt->duration) {
2706 st->info->codec_info_duration += pkt->duration;
2707 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2710 #if FF_API_R_FRAME_RATE
2712 int64_t last = st->info->last_dts;
2714 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2715 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2716 int64_t duration= pkt->dts - last;
2718 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2719 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2720 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2721 int framerate= get_std_framerate(i);
2722 double sdts= dts*framerate/(1001*12);
2724 int64_t ticks= llrint(sdts+j*0.5);
2725 double error= sdts - ticks + j*0.5;
2726 st->info->duration_error[j][0][i] += error;
2727 st->info->duration_error[j][1][i] += error*error;
2730 st->info->duration_count++;
2731 // ignore the first 4 values, they might have some random jitter
2732 if (st->info->duration_count > 3)
2733 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2735 if (pkt->dts != AV_NOPTS_VALUE)
2736 st->info->last_dts = pkt->dts;
2739 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2740 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2741 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2742 st->codec->extradata_size= i;
2743 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2744 if (!st->codec->extradata)
2745 return AVERROR(ENOMEM);
2746 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2747 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2751 /* if still no information, we try to open the codec and to
2752 decompress the frame. We try to avoid that in most cases as
2753 it takes longer and uses more memory. For MPEG-4, we need to
2754 decompress for QuickTime.
2756 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2757 least one frame of codec data, this makes sure the codec initializes
2758 the channel configuration and does not only trust the values from the container.
2760 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2762 st->codec_info_nb_frames++;
2767 AVPacket empty_pkt = { 0 };
2769 av_init_packet(&empty_pkt);
2771 ret = -1; /* we could not have all the codec parameters before EOF */
2772 for(i=0;i<ic->nb_streams;i++) {
2775 st = ic->streams[i];
2777 /* flush the decoders */
2778 if (st->info->found_decoder == 1) {
2780 err = try_decode_frame(st, &empty_pkt,
2781 (options && i < orig_nb_streams) ?
2782 &options[i] : NULL);
2783 } while (err > 0 && !has_codec_parameters(st, NULL));
2786 av_log(ic, AV_LOG_INFO,
2787 "decoding for stream %d failed\n", st->index);
2791 if (!has_codec_parameters(st, &errmsg)) {
2793 avcodec_string(buf, sizeof(buf), st->codec, 0);
2794 av_log(ic, AV_LOG_WARNING,
2795 "Could not find codec parameters for stream %d (%s): %s\n"
2796 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2804 // close codecs which were opened in try_decode_frame()
2805 for(i=0;i<ic->nb_streams;i++) {
2806 st = ic->streams[i];
2807 avcodec_close(st->codec);
2809 for(i=0;i<ic->nb_streams;i++) {
2810 st = ic->streams[i];
2811 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2812 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2813 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2814 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2815 st->codec->codec_tag= tag;
2818 /* estimate average framerate if not set by demuxer */
2819 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2821 double best_error = 0.01;
2823 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2824 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2825 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2827 /* round guessed framerate to a "standard" framerate if it's
2828 * within 1% of the original estimate*/
2829 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2830 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2831 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2833 if (error < best_error) {
2835 best_fps = std_fps.num;
2839 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2840 best_fps, 12*1001, INT_MAX);
2843 // the check for tb_unreliable() is not completely correct, since this is not about handling
2844 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2845 // ipmovie.c produces.
2846 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
2847 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);
2848 if (st->info->duration_count && !st->r_frame_rate.num
2849 && tb_unreliable(st->codec)) {
2851 double best_error= 0.01;
2853 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2856 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2858 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2861 int n= st->info->duration_count;
2862 double a= st->info->duration_error[k][0][j] / n;
2863 double error= st->info->duration_error[k][1][j]/n - a*a;
2865 if(error < best_error && best_error> 0.000000001){
2867 num = get_std_framerate(j);
2870 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2873 // do not increase frame rate by more than 1 % in order to match a standard rate.
2874 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2875 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2878 if (!st->r_frame_rate.num){
2879 if( st->codec->time_base.den * (int64_t)st->time_base.num
2880 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2881 st->r_frame_rate.num = st->codec->time_base.den;
2882 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2884 st->r_frame_rate.num = st->time_base.den;
2885 st->r_frame_rate.den = st->time_base.num;
2888 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2889 if(!st->codec->bits_per_coded_sample)
2890 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2891 // set stream disposition based on audio service type
2892 switch (st->codec->audio_service_type) {
2893 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2894 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2895 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2896 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2897 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2898 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2899 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2900 st->disposition = AV_DISPOSITION_COMMENT; break;
2901 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2902 st->disposition = AV_DISPOSITION_KARAOKE; break;
2908 estimate_timings(ic, old_offset);
2910 compute_chapters_end(ic);
2912 find_stream_info_err:
2913 for (i=0; i < ic->nb_streams; i++) {
2914 if (ic->streams[i]->codec)
2915 ic->streams[i]->codec->thread_count = 0;
2916 av_freep(&ic->streams[i]->info);
2919 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2923 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2927 for (i = 0; i < ic->nb_programs; i++) {
2928 if (ic->programs[i] == last) {
2932 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2933 if (ic->programs[i]->stream_index[j] == s)
2934 return ic->programs[i];
2940 int av_find_best_stream(AVFormatContext *ic,
2941 enum AVMediaType type,
2942 int wanted_stream_nb,
2944 AVCodec **decoder_ret,
2947 int i, nb_streams = ic->nb_streams;
2948 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2949 unsigned *program = NULL;
2950 AVCodec *decoder = NULL, *best_decoder = NULL;
2952 if (related_stream >= 0 && wanted_stream_nb < 0) {
2953 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2955 program = p->stream_index;
2956 nb_streams = p->nb_stream_indexes;
2959 for (i = 0; i < nb_streams; i++) {
2960 int real_stream_index = program ? program[i] : i;
2961 AVStream *st = ic->streams[real_stream_index];
2962 AVCodecContext *avctx = st->codec;
2963 if (avctx->codec_type != type)
2965 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2967 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2970 decoder = avcodec_find_decoder(st->codec->codec_id);
2973 ret = AVERROR_DECODER_NOT_FOUND;
2977 if (best_count >= st->codec_info_nb_frames)
2979 best_count = st->codec_info_nb_frames;
2980 ret = real_stream_index;
2981 best_decoder = decoder;
2982 if (program && i == nb_streams - 1 && ret < 0) {
2984 nb_streams = ic->nb_streams;
2985 i = 0; /* no related stream found, try again with everything */
2989 *decoder_ret = best_decoder;
2993 /*******************************************************/
2995 int av_read_play(AVFormatContext *s)
2997 if (s->iformat->read_play)
2998 return s->iformat->read_play(s);
3000 return avio_pause(s->pb, 0);
3001 return AVERROR(ENOSYS);
3004 int av_read_pause(AVFormatContext *s)
3006 if (s->iformat->read_pause)
3007 return s->iformat->read_pause(s);
3009 return avio_pause(s->pb, 1);
3010 return AVERROR(ENOSYS);
3013 void ff_free_stream(AVFormatContext *s, AVStream *st){
3014 av_assert0(s->nb_streams>0);
3015 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3018 av_parser_close(st->parser);
3020 if (st->attached_pic.data)
3021 av_free_packet(&st->attached_pic);
3022 av_dict_free(&st->metadata);
3023 av_freep(&st->index_entries);
3024 av_freep(&st->codec->extradata);
3025 av_freep(&st->codec->subtitle_header);
3026 av_freep(&st->codec);
3027 av_freep(&st->priv_data);
3028 av_freep(&st->info);
3029 av_freep(&st->probe_data.buf);
3030 av_freep(&s->streams[ --s->nb_streams ]);
3033 void avformat_free_context(AVFormatContext *s)
3041 if (s->iformat && s->iformat->priv_class && s->priv_data)
3042 av_opt_free(s->priv_data);
3044 for(i=s->nb_streams-1; i>=0; i--) {
3045 ff_free_stream(s, s->streams[i]);
3047 for(i=s->nb_programs-1; i>=0; i--) {
3048 av_dict_free(&s->programs[i]->metadata);
3049 av_freep(&s->programs[i]->stream_index);
3050 av_freep(&s->programs[i]);
3052 av_freep(&s->programs);
3053 av_freep(&s->priv_data);
3054 while(s->nb_chapters--) {
3055 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3056 av_freep(&s->chapters[s->nb_chapters]);
3058 av_freep(&s->chapters);
3059 av_dict_free(&s->metadata);
3060 av_freep(&s->streams);
3064 #if FF_API_CLOSE_INPUT_FILE
3065 void av_close_input_file(AVFormatContext *s)
3067 avformat_close_input(&s);
3071 void avformat_close_input(AVFormatContext **ps)
3073 AVFormatContext *s = *ps;
3074 AVIOContext *pb = s->pb;
3076 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3077 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3080 flush_packet_queue(s);
3083 if (s->iformat->read_close)
3084 s->iformat->read_close(s);
3087 avformat_free_context(s);
3094 #if FF_API_NEW_STREAM
3095 AVStream *av_new_stream(AVFormatContext *s, int id)
3097 AVStream *st = avformat_new_stream(s, NULL);
3104 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3110 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3112 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3115 s->streams = streams;
3117 st = av_mallocz(sizeof(AVStream));
3120 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3124 st->info->last_dts = AV_NOPTS_VALUE;
3126 st->codec = avcodec_alloc_context3(c);
3128 /* no default bitrate if decoding */
3129 st->codec->bit_rate = 0;
3131 st->index = s->nb_streams;
3132 st->start_time = AV_NOPTS_VALUE;
3133 st->duration = AV_NOPTS_VALUE;
3134 /* we set the current DTS to 0 so that formats without any timestamps
3135 but durations get some timestamps, formats with some unknown
3136 timestamps have their first few packets buffered and the
3137 timestamps corrected before they are returned to the user */
3138 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3139 st->first_dts = AV_NOPTS_VALUE;
3140 st->probe_packets = MAX_PROBE_PACKETS;
3142 /* default pts setting is MPEG-like */
3143 avpriv_set_pts_info(st, 33, 1, 90000);
3144 st->last_IP_pts = AV_NOPTS_VALUE;
3145 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3146 st->pts_buffer[i]= AV_NOPTS_VALUE;
3147 st->reference_dts = AV_NOPTS_VALUE;
3149 st->sample_aspect_ratio = (AVRational){0,1};
3151 #if FF_API_R_FRAME_RATE
3152 st->info->last_dts = AV_NOPTS_VALUE;
3154 st->info->fps_first_dts = AV_NOPTS_VALUE;
3155 st->info->fps_last_dts = AV_NOPTS_VALUE;
3157 s->streams[s->nb_streams++] = st;
3161 AVProgram *av_new_program(AVFormatContext *ac, int id)
3163 AVProgram *program=NULL;
3166 av_dlog(ac, "new_program: id=0x%04x\n", id);
3168 for(i=0; i<ac->nb_programs; i++)
3169 if(ac->programs[i]->id == id)
3170 program = ac->programs[i];
3173 program = av_mallocz(sizeof(AVProgram));
3176 dynarray_add(&ac->programs, &ac->nb_programs, program);
3177 program->discard = AVDISCARD_NONE;
3181 program->start_time =
3182 program->end_time = AV_NOPTS_VALUE;
3187 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3189 AVChapter *chapter = NULL;
3192 for(i=0; i<s->nb_chapters; i++)
3193 if(s->chapters[i]->id == id)
3194 chapter = s->chapters[i];
3197 chapter= av_mallocz(sizeof(AVChapter));
3200 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3202 av_dict_set(&chapter->metadata, "title", title, 0);
3204 chapter->time_base= time_base;
3205 chapter->start = start;
3211 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3214 AVProgram *program=NULL;
3217 if (idx >= ac->nb_streams) {
3218 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3222 for(i=0; i<ac->nb_programs; i++){
3223 if(ac->programs[i]->id != progid)
3225 program = ac->programs[i];
3226 for(j=0; j<program->nb_stream_indexes; j++)
3227 if(program->stream_index[j] == idx)
3230 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3233 program->stream_index = tmp;
3234 program->stream_index[program->nb_stream_indexes++] = idx;
3239 static void print_fps(double d, const char *postfix){
3240 uint64_t v= lrintf(d*100);
3241 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3242 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3243 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3246 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3248 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3249 AVDictionaryEntry *tag=NULL;
3251 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3252 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3253 if(strcmp("language", tag->key)){
3254 const char *p = tag->value;
3255 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3258 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3259 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3260 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3262 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3263 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3266 av_log(ctx, AV_LOG_INFO, "\n");
3272 /* "user interface" functions */
3273 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3276 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3277 AVStream *st = ic->streams[i];
3278 int g = av_gcd(st->time_base.num, st->time_base.den);
3279 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3280 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3281 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3282 /* the pid is an important information, so we display it */
3283 /* XXX: add a generic system */
3284 if (flags & AVFMT_SHOW_IDS)
3285 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3287 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3288 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3289 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3290 if (st->sample_aspect_ratio.num && // default
3291 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3292 AVRational display_aspect_ratio;
3293 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3294 st->codec->width*st->sample_aspect_ratio.num,
3295 st->codec->height*st->sample_aspect_ratio.den,
3297 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3298 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3299 display_aspect_ratio.num, display_aspect_ratio.den);
3301 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3302 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3303 print_fps(av_q2d(st->avg_frame_rate), "fps");
3304 #if FF_API_R_FRAME_RATE
3305 if(st->r_frame_rate.den && st->r_frame_rate.num)
3306 print_fps(av_q2d(st->r_frame_rate), "tbr");
3308 if(st->time_base.den && st->time_base.num)
3309 print_fps(1/av_q2d(st->time_base), "tbn");
3310 if(st->codec->time_base.den && st->codec->time_base.num)
3311 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3313 if (st->disposition & AV_DISPOSITION_DEFAULT)
3314 av_log(NULL, AV_LOG_INFO, " (default)");
3315 if (st->disposition & AV_DISPOSITION_DUB)
3316 av_log(NULL, AV_LOG_INFO, " (dub)");
3317 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3318 av_log(NULL, AV_LOG_INFO, " (original)");
3319 if (st->disposition & AV_DISPOSITION_COMMENT)
3320 av_log(NULL, AV_LOG_INFO, " (comment)");
3321 if (st->disposition & AV_DISPOSITION_LYRICS)
3322 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3323 if (st->disposition & AV_DISPOSITION_KARAOKE)
3324 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3325 if (st->disposition & AV_DISPOSITION_FORCED)
3326 av_log(NULL, AV_LOG_INFO, " (forced)");
3327 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3328 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3329 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3330 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3331 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3332 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3333 av_log(NULL, AV_LOG_INFO, "\n");
3334 dump_metadata(NULL, st->metadata, " ");
3337 void av_dump_format(AVFormatContext *ic,
3343 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3344 if (ic->nb_streams && !printed)
3347 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3348 is_output ? "Output" : "Input",
3350 is_output ? ic->oformat->name : ic->iformat->name,
3351 is_output ? "to" : "from", url);
3352 dump_metadata(NULL, ic->metadata, " ");
3354 av_log(NULL, AV_LOG_INFO, " Duration: ");
3355 if (ic->duration != AV_NOPTS_VALUE) {
3356 int hours, mins, secs, us;
3357 int64_t duration = ic->duration + 5000;
3358 secs = duration / AV_TIME_BASE;
3359 us = duration % AV_TIME_BASE;
3364 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3365 (100 * us) / AV_TIME_BASE);
3367 av_log(NULL, AV_LOG_INFO, "N/A");
3369 if (ic->start_time != AV_NOPTS_VALUE) {
3371 av_log(NULL, AV_LOG_INFO, ", start: ");
3372 secs = ic->start_time / AV_TIME_BASE;
3373 us = abs(ic->start_time % AV_TIME_BASE);
3374 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3375 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3377 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3379 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3381 av_log(NULL, AV_LOG_INFO, "N/A");
3383 av_log(NULL, AV_LOG_INFO, "\n");
3385 for (i = 0; i < ic->nb_chapters; i++) {
3386 AVChapter *ch = ic->chapters[i];
3387 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3388 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3389 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3391 dump_metadata(NULL, ch->metadata, " ");
3393 if(ic->nb_programs) {
3394 int j, k, total = 0;
3395 for(j=0; j<ic->nb_programs; j++) {
3396 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3398 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3399 name ? name->value : "");
3400 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3401 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3402 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3403 printed[ic->programs[j]->stream_index[k]] = 1;
3405 total += ic->programs[j]->nb_stream_indexes;
3407 if (total < ic->nb_streams)
3408 av_log(NULL, AV_LOG_INFO, " No Program\n");
3410 for(i=0;i<ic->nb_streams;i++)
3412 dump_stream_format(ic, i, index, is_output);
3417 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3418 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3420 return av_gettime();
3424 uint64_t ff_ntp_time(void)
3426 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3429 int av_get_frame_filename(char *buf, int buf_size,
3430 const char *path, int number)
3433 char *q, buf1[20], c;
3434 int nd, len, percentd_found;
3446 while (isdigit(*p)) {
3447 nd = nd * 10 + *p++ - '0';
3450 } while (isdigit(c));
3459 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3461 if ((q - buf + len) > buf_size - 1)
3463 memcpy(q, buf1, len);
3471 if ((q - buf) < buf_size - 1)
3475 if (!percentd_found)
3484 static void hex_dump_internal(void *avcl, FILE *f, int level,
3485 const uint8_t *buf, int size)
3489 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3491 for(i=0;i<size;i+=16) {
3498 PRINT(" %02x", buf[i+j]);
3503 for(j=0;j<len;j++) {
3505 if (c < ' ' || c > '~')
3514 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3516 hex_dump_internal(NULL, f, 0, buf, size);
3519 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3521 hex_dump_internal(avcl, NULL, level, buf, size);
3524 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3527 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3528 PRINT("stream #%d:\n", pkt->stream_index);
3529 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3530 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3531 /* DTS is _always_ valid after av_read_frame() */
3533 if (pkt->dts == AV_NOPTS_VALUE)
3536 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3537 /* PTS may not be known if B-frames are present. */
3539 if (pkt->pts == AV_NOPTS_VALUE)
3542 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3544 PRINT(" size=%d\n", pkt->size);
3547 av_hex_dump(f, pkt->data, pkt->size);
3551 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3553 AVRational tb = { 1, AV_TIME_BASE };
3554 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3558 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3560 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3564 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3566 AVRational tb = { 1, AV_TIME_BASE };
3567 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3571 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3574 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3577 void av_url_split(char *proto, int proto_size,
3578 char *authorization, int authorization_size,
3579 char *hostname, int hostname_size,
3581 char *path, int path_size,
3584 const char *p, *ls, *ls2, *at, *col, *brk;
3586 if (port_ptr) *port_ptr = -1;
3587 if (proto_size > 0) proto[0] = 0;
3588 if (authorization_size > 0) authorization[0] = 0;
3589 if (hostname_size > 0) hostname[0] = 0;
3590 if (path_size > 0) path[0] = 0;
3592 /* parse protocol */
3593 if ((p = strchr(url, ':'))) {
3594 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3599 /* no protocol means plain filename */
3600 av_strlcpy(path, url, path_size);
3604 /* separate path from hostname */
3605 ls = strchr(p, '/');
3606 ls2 = strchr(p, '?');
3610 ls = FFMIN(ls, ls2);
3612 av_strlcpy(path, ls, path_size);
3614 ls = &p[strlen(p)]; // XXX
3616 /* the rest is hostname, use that to parse auth/port */
3618 /* authorization (user[:pass]@hostname) */
3619 if ((at = strchr(p, '@')) && at < ls) {
3620 av_strlcpy(authorization, p,
3621 FFMIN(authorization_size, at + 1 - p));
3622 p = at + 1; /* skip '@' */
3625 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3627 av_strlcpy(hostname, p + 1,
3628 FFMIN(hostname_size, brk - p));
3629 if (brk[1] == ':' && port_ptr)
3630 *port_ptr = atoi(brk + 2);
3631 } else if ((col = strchr(p, ':')) && col < ls) {
3632 av_strlcpy(hostname, p,
3633 FFMIN(col + 1 - p, hostname_size));
3634 if (port_ptr) *port_ptr = atoi(col + 1);
3636 av_strlcpy(hostname, p,
3637 FFMIN(ls + 1 - p, hostname_size));
3641 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3644 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3647 'C', 'D', 'E', 'F' };
3648 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3651 'c', 'd', 'e', 'f' };
3652 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3654 for(i = 0; i < s; i++) {
3655 buff[i * 2] = hex_table[src[i] >> 4];
3656 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3662 int ff_hex_to_data(uint8_t *data, const char *p)
3669 p += strspn(p, SPACE_CHARS);
3672 c = toupper((unsigned char) *p++);
3673 if (c >= '0' && c <= '9')
3675 else if (c >= 'A' && c <= 'F')
3690 #if FF_API_SET_PTS_INFO
3691 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3692 unsigned int pts_num, unsigned int pts_den)
3694 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3698 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3699 unsigned int pts_num, unsigned int pts_den)
3702 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3703 if(new_tb.num != pts_num)
3704 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3706 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3708 if(new_tb.num <= 0 || new_tb.den <= 0) {
3709 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", new_tb.num, new_tb.den, s->index);
3712 s->time_base = new_tb;
3713 av_codec_set_pkt_timebase(s->codec, new_tb);
3714 s->pts_wrap_bits = pts_wrap_bits;
3717 int ff_url_join(char *str, int size, const char *proto,
3718 const char *authorization, const char *hostname,
3719 int port, const char *fmt, ...)
3722 struct addrinfo hints = { 0 }, *ai;
3727 av_strlcatf(str, size, "%s://", proto);
3728 if (authorization && authorization[0])
3729 av_strlcatf(str, size, "%s@", authorization);
3730 #if CONFIG_NETWORK && defined(AF_INET6)
3731 /* Determine if hostname is a numerical IPv6 address,
3732 * properly escape it within [] in that case. */
3733 hints.ai_flags = AI_NUMERICHOST;
3734 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3735 if (ai->ai_family == AF_INET6) {
3736 av_strlcat(str, "[", size);
3737 av_strlcat(str, hostname, size);
3738 av_strlcat(str, "]", size);
3740 av_strlcat(str, hostname, size);
3745 /* Not an IPv6 address, just output the plain string. */
3746 av_strlcat(str, hostname, size);
3749 av_strlcatf(str, size, ":%d", port);
3752 int len = strlen(str);
3755 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3761 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3762 AVFormatContext *src)
3767 local_pkt.stream_index = dst_stream;
3768 if (pkt->pts != AV_NOPTS_VALUE)
3769 local_pkt.pts = av_rescale_q(pkt->pts,
3770 src->streams[pkt->stream_index]->time_base,
3771 dst->streams[dst_stream]->time_base);
3772 if (pkt->dts != AV_NOPTS_VALUE)
3773 local_pkt.dts = av_rescale_q(pkt->dts,
3774 src->streams[pkt->stream_index]->time_base,
3775 dst->streams[dst_stream]->time_base);
3776 return av_write_frame(dst, &local_pkt);
3779 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3782 const char *ptr = str;
3784 /* Parse key=value pairs. */
3787 char *dest = NULL, *dest_end;
3788 int key_len, dest_len = 0;
3790 /* Skip whitespace and potential commas. */
3791 while (*ptr && (isspace(*ptr) || *ptr == ','))
3798 if (!(ptr = strchr(key, '=')))
3801 key_len = ptr - key;
3803 callback_get_buf(context, key, key_len, &dest, &dest_len);
3804 dest_end = dest + dest_len - 1;
3808 while (*ptr && *ptr != '\"') {
3812 if (dest && dest < dest_end)
3816 if (dest && dest < dest_end)
3824 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3825 if (dest && dest < dest_end)
3833 int ff_find_stream_index(AVFormatContext *s, int id)
3836 for (i = 0; i < s->nb_streams; i++) {
3837 if (s->streams[i]->id == id)
3843 void ff_make_absolute_url(char *buf, int size, const char *base,
3846 char *sep, *path_query;
3847 /* Absolute path, relative to the current server */
3848 if (base && strstr(base, "://") && rel[0] == '/') {
3850 av_strlcpy(buf, base, size);
3851 sep = strstr(buf, "://");
3853 /* Take scheme from base url */
3854 if (rel[1] == '/') {
3857 /* Take scheme and host from base url */
3859 sep = strchr(sep, '/');
3864 av_strlcat(buf, rel, size);
3867 /* If rel actually is an absolute url, just copy it */
3868 if (!base || strstr(rel, "://") || rel[0] == '/') {
3869 av_strlcpy(buf, rel, size);
3873 av_strlcpy(buf, base, size);
3875 /* Strip off any query string from base */
3876 path_query = strchr(buf, '?');
3877 if (path_query != NULL)
3880 /* Is relative path just a new query part? */
3881 if (rel[0] == '?') {
3882 av_strlcat(buf, rel, size);
3886 /* Remove the file name from the base url */
3887 sep = strrchr(buf, '/');
3892 while (av_strstart(rel, "../", NULL) && sep) {
3893 /* Remove the path delimiter at the end */
3895 sep = strrchr(buf, '/');
3896 /* If the next directory name to pop off is "..", break here */
3897 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3898 /* Readd the slash we just removed */
3899 av_strlcat(buf, "/", size);
3902 /* Cut off the directory name */
3909 av_strlcat(buf, rel, size);
3912 int64_t ff_iso8601_to_unix_time(const char *datestr)
3914 struct tm time1 = {0}, time2 = {0};
3916 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3917 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3919 return av_timegm(&time2);
3921 return av_timegm(&time1);
3924 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3927 if (ofmt->query_codec)
3928 return ofmt->query_codec(codec_id, std_compliance);
3929 else if (ofmt->codec_tag)
3930 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3931 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3932 codec_id == ofmt->subtitle_codec)
3935 return AVERROR_PATCHWELCOME;
3938 int avformat_network_init(void)
3942 ff_network_inited_globally = 1;
3943 if ((ret = ff_network_init()) < 0)
3950 int avformat_network_deinit(void)
3959 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3960 uint64_t channel_layout, int32_t sample_rate,
3961 int32_t width, int32_t height)
3967 return AVERROR(EINVAL);
3970 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3972 if (channel_layout) {
3974 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3978 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3980 if (width || height) {
3982 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3984 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3986 return AVERROR(ENOMEM);
3987 bytestream_put_le32(&data, flags);
3989 bytestream_put_le32(&data, channels);
3991 bytestream_put_le64(&data, channel_layout);
3993 bytestream_put_le32(&data, sample_rate);
3994 if (width || height) {
3995 bytestream_put_le32(&data, width);
3996 bytestream_put_le32(&data, height);
4001 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4003 return ff_codec_bmp_tags;
4005 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4007 return ff_codec_wav_tags;
4010 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4012 AVRational undef = {0, 1};
4013 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4014 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4015 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4017 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4018 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4019 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4020 stream_sample_aspect_ratio = undef;
4022 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4023 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4024 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4025 frame_sample_aspect_ratio = undef;
4027 if (stream_sample_aspect_ratio.num)
4028 return stream_sample_aspect_ratio;
4030 return frame_sample_aspect_ratio;
4033 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4036 if (*spec <= '9' && *spec >= '0') /* opt:index */
4037 return strtol(spec, NULL, 0) == st->index;
4038 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4039 *spec == 't') { /* opt:[vasdt] */
4040 enum AVMediaType type;
4043 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4044 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4045 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4046 case 'd': type = AVMEDIA_TYPE_DATA; break;
4047 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4048 default: av_assert0(0);
4050 if (type != st->codec->codec_type)
4052 if (*spec++ == ':') { /* possibly followed by :index */
4053 int i, index = strtol(spec, NULL, 0);
4054 for (i = 0; i < s->nb_streams; i++)
4055 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4056 return i == st->index;
4060 } else if (*spec == 'p' && *(spec + 1) == ':') {
4064 prog_id = strtol(spec, &endptr, 0);
4065 for (i = 0; i < s->nb_programs; i++) {
4066 if (s->programs[i]->id != prog_id)
4069 if (*endptr++ == ':') {
4070 int stream_idx = strtol(endptr, NULL, 0);
4071 return stream_idx >= 0 &&
4072 stream_idx < s->programs[i]->nb_stream_indexes &&
4073 st->index == s->programs[i]->stream_index[stream_idx];
4076 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4077 if (st->index == s->programs[i]->stream_index[j])
4081 } else if (*spec == '#') {
4084 sid = strtol(spec + 1, &endptr, 0);
4086 return st->id == sid;
4087 } else if (!*spec) /* empty specifier, matches everything */
4090 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4091 return AVERROR(EINVAL);