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;
298 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
301 lpd.buf = zerobuffer;
303 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
304 int id3len = ff_id3v2_tag_len(lpd.buf);
305 if (lpd.buf_size > id3len + 16) {
307 lpd.buf_size -= id3len;
313 while ((fmt1 = av_iformat_next(fmt1))) {
314 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
317 if (fmt1->read_probe) {
318 score = fmt1->read_probe(&lpd);
319 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
320 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
321 } else if (fmt1->extensions) {
322 if (av_match_ext(lpd.filename, fmt1->extensions)) {
326 if (score > score_max) {
329 }else if (score == score_max)
332 *score_ret= score_max;
337 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
341 if(score_ret > *score_max){
342 *score_max= score_ret;
348 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
350 return av_probe_input_format2(pd, is_opened, &score);
353 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
355 static const struct {
356 const char *name; enum AVCodecID id; enum AVMediaType type;
358 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
359 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
360 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
361 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
362 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
363 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
364 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
365 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
366 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
372 if (fmt && st->request_probe <= score) {
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
390 int av_demuxer_open(AVFormatContext *ic){
393 if (ic->iformat->read_header) {
394 err = ic->iformat->read_header(ic);
399 if (ic->pb && !ic->data_offset)
400 ic->data_offset = avio_tell(ic->pb);
406 /** size of probe buffer, for guessing file type from file contents */
407 #define PROBE_BUF_MIN 2048
408 #define PROBE_BUF_MAX (1<<20)
410 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
411 const char *filename, void *logctx,
412 unsigned int offset, unsigned int max_probe_size)
414 AVProbeData pd = { filename ? filename : "", NULL, -offset };
415 unsigned char *buf = NULL;
416 int ret = 0, probe_size;
418 if (!max_probe_size) {
419 max_probe_size = PROBE_BUF_MAX;
420 } else if (max_probe_size > PROBE_BUF_MAX) {
421 max_probe_size = PROBE_BUF_MAX;
422 } else if (max_probe_size < PROBE_BUF_MIN) {
423 return AVERROR(EINVAL);
426 if (offset >= max_probe_size) {
427 return AVERROR(EINVAL);
430 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
431 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
432 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
433 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
436 if (probe_size < offset) {
440 /* read probe data */
441 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
444 return AVERROR(ENOMEM);
447 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
448 /* fail if error was not end of file, otherwise, lower score */
449 if (ret != AVERROR_EOF) {
454 ret = 0; /* error was end of file, nothing read */
457 pd.buf = &buf[offset];
459 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
461 /* guess file format */
462 *fmt = av_probe_input_format2(&pd, 1, &score);
464 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
465 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
467 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
473 return AVERROR_INVALIDDATA;
476 /* rewind. reuse probe buffer to avoid seeking */
477 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
482 /* open input file and probe the format if necessary */
483 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
486 AVProbeData pd = {filename, NULL, 0};
487 int score = AVPROBE_SCORE_RETRY;
490 s->flags |= AVFMT_FLAG_CUSTOM_IO;
492 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
493 else if (s->iformat->flags & AVFMT_NOFILE)
494 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
495 "will be ignored with AVFMT_NOFILE format.\n");
499 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
500 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
503 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
504 &s->interrupt_callback, options)) < 0)
508 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
511 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
512 AVPacketList **plast_pktl){
513 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
518 (*plast_pktl)->next = pktl;
520 *packet_buffer = pktl;
522 /* add the packet in the buffered packet list */
528 void avformat_queue_attached_pictures(AVFormatContext *s)
531 for (i = 0; i < s->nb_streams; i++)
532 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
533 s->streams[i]->discard < AVDISCARD_ALL) {
534 AVPacket copy = s->streams[i]->attached_pic;
535 copy.destruct = NULL;
536 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
540 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
542 AVFormatContext *s = *ps;
544 AVDictionary *tmp = NULL;
545 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
547 if (!s && !(s = avformat_alloc_context()))
548 return AVERROR(ENOMEM);
550 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
551 return AVERROR(EINVAL);
557 av_dict_copy(&tmp, *options, 0);
559 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
562 if ((ret = init_input(s, filename, &tmp)) < 0)
565 /* check filename in case an image number is expected */
566 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
567 if (!av_filename_number_test(filename)) {
568 ret = AVERROR(EINVAL);
573 s->duration = s->start_time = AV_NOPTS_VALUE;
574 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
576 /* allocate private data */
577 if (s->iformat->priv_data_size > 0) {
578 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
579 ret = AVERROR(ENOMEM);
582 if (s->iformat->priv_class) {
583 *(const AVClass**)s->priv_data = s->iformat->priv_class;
584 av_opt_set_defaults(s->priv_data);
585 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
590 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
592 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
594 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
595 if ((ret = s->iformat->read_header(s)) < 0)
598 if (id3v2_extra_meta) {
599 if (!strcmp(s->iformat->name, "mp3")) {
600 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
603 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
605 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
607 avformat_queue_attached_pictures(s);
609 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
610 s->data_offset = avio_tell(s->pb);
612 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
615 av_dict_free(options);
622 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
624 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
626 avformat_free_context(s);
631 /*******************************************************/
633 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
635 if(st->request_probe>0){
636 AVProbeData *pd = &st->probe_data;
638 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
642 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
646 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
647 pd->buf_size += pkt->size;
648 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
651 st->probe_packets = 0;
653 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
658 end= s->raw_packet_buffer_remaining_size <= 0
659 || st->probe_packets<=0;
661 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
662 int score= set_codec_from_probe_data(s, st, pd);
663 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
667 st->request_probe= -1;
668 if(st->codec->codec_id != AV_CODEC_ID_NONE){
669 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
671 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
677 static void force_codec_ids(AVFormatContext *s, AVStream *st)
679 switch(st->codec->codec_type){
680 case AVMEDIA_TYPE_VIDEO:
681 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
683 case AVMEDIA_TYPE_AUDIO:
684 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
686 case AVMEDIA_TYPE_SUBTITLE:
687 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
692 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
698 AVPacketList *pktl = s->raw_packet_buffer;
702 st = s->streams[pkt->stream_index];
703 if(st->request_probe <= 0){
704 s->raw_packet_buffer = pktl->next;
705 s->raw_packet_buffer_remaining_size += pkt->size;
714 ret= s->iformat->read_packet(s, pkt);
716 if (!pktl || ret == AVERROR(EAGAIN))
718 for (i = 0; i < s->nb_streams; i++) {
720 if (st->probe_packets) {
721 probe_codec(s, st, NULL);
723 av_assert0(st->request_probe <= 0);
728 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
729 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
730 av_log(s, AV_LOG_WARNING,
731 "Dropped corrupted packet (stream = %d)\n",
737 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
738 av_packet_merge_side_data(pkt);
740 if(pkt->stream_index >= (unsigned)s->nb_streams){
741 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
745 st= s->streams[pkt->stream_index];
747 force_codec_ids(s, st);
749 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
750 if (s->use_wallclock_as_timestamps)
751 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
753 if(!pktl && st->request_probe <= 0)
756 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
757 s->raw_packet_buffer_remaining_size -= pkt->size;
759 probe_codec(s, st, pkt);
763 #if FF_API_READ_PACKET
764 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
766 return ff_read_packet(s, pkt);
771 /**********************************************************/
773 static int determinable_frame_size(AVCodecContext *avctx)
775 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
776 avctx->codec_id == AV_CODEC_ID_MP1 ||
777 avctx->codec_id == AV_CODEC_ID_MP2 ||
778 avctx->codec_id == AV_CODEC_ID_MP3/* ||
779 avctx->codec_id == AV_CODEC_ID_CELT*/)
785 * Get the number of samples of an audio frame. Return -1 on error.
787 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
791 /* give frame_size priority if demuxing */
792 if (!mux && enc->frame_size > 1)
793 return enc->frame_size;
795 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
798 /* fallback to using frame_size if muxing */
799 if (enc->frame_size > 1)
800 return enc->frame_size;
807 * Return the frame duration in seconds. Return 0 if not available.
809 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
810 AVCodecParserContext *pc, AVPacket *pkt)
816 switch(st->codec->codec_type) {
817 case AVMEDIA_TYPE_VIDEO:
818 if (st->r_frame_rate.num && !pc) {
819 *pnum = st->r_frame_rate.den;
820 *pden = st->r_frame_rate.num;
821 } else if(st->time_base.num*1000LL > st->time_base.den) {
822 *pnum = st->time_base.num;
823 *pden = st->time_base.den;
824 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
825 *pnum = st->codec->time_base.num;
826 *pden = st->codec->time_base.den;
827 if (pc && pc->repeat_pict) {
828 *pnum = (*pnum) * (1 + pc->repeat_pict);
830 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
831 //Thus if we have no parser in such case leave duration undefined.
832 if(st->codec->ticks_per_frame>1 && !pc){
837 case AVMEDIA_TYPE_AUDIO:
838 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
839 if (frame_size <= 0 || st->codec->sample_rate <= 0)
842 *pden = st->codec->sample_rate;
849 static int is_intra_only(AVCodecContext *enc){
850 const AVCodecDescriptor *desc;
852 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
855 desc = av_codec_get_codec_descriptor(enc);
857 desc = avcodec_descriptor_get(enc->codec_id);
858 av_codec_set_codec_descriptor(enc, desc);
861 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
865 static int has_decode_delay_been_guessed(AVStream *st)
867 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
868 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
870 #if CONFIG_H264_DECODER
871 if(st->codec->has_b_frames &&
872 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
875 if(st->codec->has_b_frames<3)
876 return st->nb_decoded_frames >= 7;
877 else if(st->codec->has_b_frames<4)
878 return st->nb_decoded_frames >= 18;
880 return st->nb_decoded_frames >= 20;
883 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
887 if (pktl == s->parse_queue_end)
888 return s->packet_buffer;
892 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
893 int64_t dts, int64_t pts)
895 AVStream *st= s->streams[stream_index];
896 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
897 int64_t pts_buffer[MAX_REORDER_DELAY+1];
901 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
904 delay = st->codec->has_b_frames;
905 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
907 shift = st->first_dts - RELATIVE_TS_BASE;
909 for (i=0; i<MAX_REORDER_DELAY+1; i++)
910 pts_buffer[i] = AV_NOPTS_VALUE;
912 if (is_relative(pts))
915 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
916 if(pktl->pkt.stream_index != stream_index)
918 if(is_relative(pktl->pkt.pts))
919 pktl->pkt.pts += shift;
921 if(is_relative(pktl->pkt.dts))
922 pktl->pkt.dts += shift;
924 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
925 st->start_time= pktl->pkt.pts;
927 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
928 pts_buffer[0]= pktl->pkt.pts;
929 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
930 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
931 if(pktl->pkt.dts == AV_NOPTS_VALUE)
932 pktl->pkt.dts= pts_buffer[0];
935 if (st->start_time == AV_NOPTS_VALUE)
936 st->start_time = pts;
939 static void update_initial_durations(AVFormatContext *s, AVStream *st,
940 int stream_index, int duration)
942 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
943 int64_t cur_dts= RELATIVE_TS_BASE;
945 if(st->first_dts != AV_NOPTS_VALUE){
946 cur_dts= st->first_dts;
947 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
948 if(pktl->pkt.stream_index == stream_index){
949 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
954 if(pktl && pktl->pkt.dts != st->first_dts) {
955 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));
959 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
962 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
963 st->first_dts = cur_dts;
964 }else if(st->cur_dts != RELATIVE_TS_BASE)
967 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
968 if(pktl->pkt.stream_index != stream_index)
970 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
971 && !pktl->pkt.duration){
972 pktl->pkt.dts= cur_dts;
973 if(!st->codec->has_b_frames)
974 pktl->pkt.pts= cur_dts;
975 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
976 pktl->pkt.duration = duration;
979 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
982 st->cur_dts= cur_dts;
985 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
986 AVCodecParserContext *pc, AVPacket *pkt)
988 int num, den, presentation_delayed, delay, i;
991 if (s->flags & AVFMT_FLAG_NOFILLIN)
994 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
995 pkt->dts= AV_NOPTS_VALUE;
997 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
998 //FIXME Set low_delay = 0 when has_b_frames = 1
999 st->codec->has_b_frames = 1;
1001 /* do we have a video B-frame ? */
1002 delay= st->codec->has_b_frames;
1003 presentation_delayed = 0;
1005 /* XXX: need has_b_frame, but cannot get it if the codec is
1008 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1009 presentation_delayed = 1;
1011 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){
1012 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1013 pkt->dts -= 1LL<<st->pts_wrap_bits;
1015 pkt->pts += 1LL<<st->pts_wrap_bits;
1018 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1019 // we take the conservative approach and discard both
1020 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1021 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1022 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1023 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1024 pkt->dts= AV_NOPTS_VALUE;
1027 if (pkt->duration == 0) {
1028 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1030 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1033 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1034 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1036 /* correct timestamps with byte offset if demuxers only have timestamps
1037 on packet boundaries */
1038 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1039 /* this will estimate bitrate based on this frame's duration and size */
1040 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1041 if(pkt->pts != AV_NOPTS_VALUE)
1043 if(pkt->dts != AV_NOPTS_VALUE)
1047 if (pc && pc->dts_sync_point >= 0) {
1048 // we have synchronization info from the parser
1049 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1051 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1052 if (pkt->dts != AV_NOPTS_VALUE) {
1053 // got DTS from the stream, update reference timestamp
1054 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1055 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1056 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1057 // compute DTS based on reference timestamp
1058 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1059 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1061 if (pc->dts_sync_point > 0)
1062 st->reference_dts = pkt->dts; // new reference
1066 /* This may be redundant, but it should not hurt. */
1067 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1068 presentation_delayed = 1;
1070 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1071 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1072 /* interpolate PTS and DTS if they are not present */
1073 //We skip H264 currently because delay and has_b_frames are not reliably set
1074 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1075 if (presentation_delayed) {
1076 /* DTS = decompression timestamp */
1077 /* PTS = presentation timestamp */
1078 if (pkt->dts == AV_NOPTS_VALUE)
1079 pkt->dts = st->last_IP_pts;
1080 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1081 if (pkt->dts == AV_NOPTS_VALUE)
1082 pkt->dts = st->cur_dts;
1084 /* this is tricky: the dts must be incremented by the duration
1085 of the frame we are displaying, i.e. the last I- or P-frame */
1086 if (st->last_IP_duration == 0)
1087 st->last_IP_duration = pkt->duration;
1088 if(pkt->dts != AV_NOPTS_VALUE)
1089 st->cur_dts = pkt->dts + st->last_IP_duration;
1090 st->last_IP_duration = pkt->duration;
1091 st->last_IP_pts= pkt->pts;
1092 /* cannot compute PTS if not present (we can compute it only
1093 by knowing the future */
1094 } else if (pkt->pts != AV_NOPTS_VALUE ||
1095 pkt->dts != AV_NOPTS_VALUE ||
1097 int duration = pkt->duration;
1099 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1100 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1101 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1102 if( old_diff < new_diff && old_diff < (duration>>3)
1103 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1104 && (!strcmp(s->iformat->name, "mpeg") ||
1105 !strcmp(s->iformat->name, "mpegts"))){
1106 pkt->pts += duration;
1107 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1108 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1109 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1113 /* presentation is not delayed : PTS and DTS are the same */
1114 if (pkt->pts == AV_NOPTS_VALUE)
1115 pkt->pts = pkt->dts;
1116 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1118 if (pkt->pts == AV_NOPTS_VALUE)
1119 pkt->pts = st->cur_dts;
1120 pkt->dts = pkt->pts;
1121 if (pkt->pts != AV_NOPTS_VALUE)
1122 st->cur_dts = pkt->pts + duration;
1126 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1127 st->pts_buffer[0]= pkt->pts;
1128 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1129 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1130 if(pkt->dts == AV_NOPTS_VALUE)
1131 pkt->dts= st->pts_buffer[0];
1133 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1134 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1136 if(pkt->dts > st->cur_dts)
1137 st->cur_dts = pkt->dts;
1139 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1140 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1143 if (is_intra_only(st->codec))
1144 pkt->flags |= AV_PKT_FLAG_KEY;
1146 pkt->convergence_duration = pc->convergence_duration;
1149 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1152 AVPacketList *pktl = *pkt_buf;
1153 *pkt_buf = pktl->next;
1154 av_free_packet(&pktl->pkt);
1157 *pkt_buf_end = NULL;
1161 * Parse a packet, add all split parts to parse_queue
1163 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1165 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1167 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1168 AVStream *st = s->streams[stream_index];
1169 uint8_t *data = pkt ? pkt->data : NULL;
1170 int size = pkt ? pkt->size : 0;
1171 int ret = 0, got_output = 0;
1174 av_init_packet(&flush_pkt);
1177 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1178 // preserve 0-size sync packets
1179 compute_pkt_fields(s, st, st->parser, pkt);
1182 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1185 av_init_packet(&out_pkt);
1186 len = av_parser_parse2(st->parser, st->codec,
1187 &out_pkt.data, &out_pkt.size, data, size,
1188 pkt->pts, pkt->dts, pkt->pos);
1190 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1192 /* increment read pointer */
1196 got_output = !!out_pkt.size;
1201 /* set the duration */
1202 out_pkt.duration = 0;
1203 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1204 if (st->codec->sample_rate > 0) {
1205 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1206 (AVRational){ 1, st->codec->sample_rate },
1210 } else if (st->codec->time_base.num != 0 &&
1211 st->codec->time_base.den != 0) {
1212 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1213 st->codec->time_base,
1218 out_pkt.stream_index = st->index;
1219 out_pkt.pts = st->parser->pts;
1220 out_pkt.dts = st->parser->dts;
1221 out_pkt.pos = st->parser->pos;
1223 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1224 out_pkt.pos = st->parser->frame_offset;
1226 if (st->parser->key_frame == 1 ||
1227 (st->parser->key_frame == -1 &&
1228 st->parser->pict_type == AV_PICTURE_TYPE_I))
1229 out_pkt.flags |= AV_PKT_FLAG_KEY;
1231 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1232 out_pkt.flags |= AV_PKT_FLAG_KEY;
1234 compute_pkt_fields(s, st, st->parser, &out_pkt);
1236 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1237 out_pkt.destruct = pkt->destruct;
1238 pkt->destruct = NULL;
1240 if ((ret = av_dup_packet(&out_pkt)) < 0)
1243 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1244 av_free_packet(&out_pkt);
1245 ret = AVERROR(ENOMEM);
1251 /* end of the stream => close and free the parser */
1252 if (pkt == &flush_pkt) {
1253 av_parser_close(st->parser);
1258 av_free_packet(pkt);
1262 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1263 AVPacketList **pkt_buffer_end,
1267 av_assert0(*pkt_buffer);
1270 *pkt_buffer = pktl->next;
1272 *pkt_buffer_end = NULL;
1277 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1279 int ret = 0, i, got_packet = 0;
1281 av_init_packet(pkt);
1283 while (!got_packet && !s->parse_queue) {
1287 /* read next packet */
1288 ret = ff_read_packet(s, &cur_pkt);
1290 if (ret == AVERROR(EAGAIN))
1292 /* flush the parsers */
1293 for(i = 0; i < s->nb_streams; i++) {
1295 if (st->parser && st->need_parsing)
1296 parse_packet(s, NULL, st->index);
1298 /* all remaining packets are now in parse_queue =>
1299 * really terminate parsing */
1303 st = s->streams[cur_pkt.stream_index];
1305 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1306 cur_pkt.dts != AV_NOPTS_VALUE &&
1307 cur_pkt.pts < cur_pkt.dts) {
1308 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1309 cur_pkt.stream_index,
1310 av_ts2str(cur_pkt.pts),
1311 av_ts2str(cur_pkt.dts),
1314 if (s->debug & FF_FDEBUG_TS)
1315 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1316 cur_pkt.stream_index,
1317 av_ts2str(cur_pkt.pts),
1318 av_ts2str(cur_pkt.dts),
1323 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1324 st->parser = av_parser_init(st->codec->codec_id);
1326 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1327 "%s, packets or times may be invalid.\n",
1328 avcodec_get_name(st->codec->codec_id));
1329 /* no parser available: just output the raw packets */
1330 st->need_parsing = AVSTREAM_PARSE_NONE;
1331 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1332 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1333 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1334 st->parser->flags |= PARSER_FLAG_ONCE;
1335 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1336 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1340 if (!st->need_parsing || !st->parser) {
1341 /* no parsing needed: we just output the packet as is */
1343 compute_pkt_fields(s, st, NULL, pkt);
1344 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1345 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1346 ff_reduce_index(s, st->index);
1347 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1350 } else if (st->discard < AVDISCARD_ALL) {
1351 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1355 av_free_packet(&cur_pkt);
1357 if (pkt->flags & AV_PKT_FLAG_KEY)
1358 st->skip_to_keyframe = 0;
1359 if (st->skip_to_keyframe) {
1360 av_free_packet(&cur_pkt);
1365 if (!got_packet && s->parse_queue)
1366 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1368 if(s->debug & FF_FDEBUG_TS)
1369 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1371 av_ts2str(pkt->pts),
1372 av_ts2str(pkt->dts),
1380 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1382 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1388 ret = s->packet_buffer ?
1389 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1390 read_frame_internal(s, pkt);
1397 AVPacketList *pktl = s->packet_buffer;
1400 AVPacket *next_pkt = &pktl->pkt;
1402 if (next_pkt->dts != AV_NOPTS_VALUE) {
1403 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1404 // last dts seen for this stream. if any of packets following
1405 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1406 int64_t last_dts = next_pkt->dts;
1407 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1408 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1409 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1410 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1411 next_pkt->pts = pktl->pkt.dts;
1413 if (last_dts != AV_NOPTS_VALUE) {
1414 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1415 last_dts = pktl->pkt.dts;
1420 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1421 // Fixing the last reference frame had none pts issue (For MXF etc).
1422 // We only do this when
1424 // 2. we are not able to resolve a pts value for current packet.
1425 // 3. the packets for this stream at the end of the files had valid dts.
1426 next_pkt->pts = last_dts + next_pkt->duration;
1428 pktl = s->packet_buffer;
1431 /* read packet from packet buffer, if there is data */
1432 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1433 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1434 ret = read_from_packet_buffer(&s->packet_buffer,
1435 &s->packet_buffer_end, pkt);
1440 ret = read_frame_internal(s, pkt);
1442 if (pktl && ret != AVERROR(EAGAIN)) {
1449 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1450 &s->packet_buffer_end)) < 0)
1451 return AVERROR(ENOMEM);
1456 st = s->streams[pkt->stream_index];
1457 if (st->skip_samples) {
1458 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1459 AV_WL32(p, st->skip_samples);
1460 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1461 st->skip_samples = 0;
1464 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1465 ff_reduce_index(s, st->index);
1466 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1469 if (is_relative(pkt->dts))
1470 pkt->dts -= RELATIVE_TS_BASE;
1471 if (is_relative(pkt->pts))
1472 pkt->pts -= RELATIVE_TS_BASE;
1477 /* XXX: suppress the packet queue */
1478 static void flush_packet_queue(AVFormatContext *s)
1480 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1481 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1482 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1484 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1487 /*******************************************************/
1490 int av_find_default_stream_index(AVFormatContext *s)
1492 int first_audio_index = -1;
1496 if (s->nb_streams <= 0)
1498 for(i = 0; i < s->nb_streams; i++) {
1500 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1501 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1504 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1505 first_audio_index = i;
1507 return first_audio_index >= 0 ? first_audio_index : 0;
1511 * Flush the frame reader.
1513 void ff_read_frame_flush(AVFormatContext *s)
1518 flush_packet_queue(s);
1520 /* for each stream, reset read state */
1521 for(i = 0; i < s->nb_streams; i++) {
1525 av_parser_close(st->parser);
1528 st->last_IP_pts = AV_NOPTS_VALUE;
1529 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1530 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1531 st->reference_dts = AV_NOPTS_VALUE;
1533 st->probe_packets = MAX_PROBE_PACKETS;
1535 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1536 st->pts_buffer[j]= AV_NOPTS_VALUE;
1540 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1544 for(i = 0; i < s->nb_streams; i++) {
1545 AVStream *st = s->streams[i];
1547 st->cur_dts = av_rescale(timestamp,
1548 st->time_base.den * (int64_t)ref_st->time_base.num,
1549 st->time_base.num * (int64_t)ref_st->time_base.den);
1553 void ff_reduce_index(AVFormatContext *s, int stream_index)
1555 AVStream *st= s->streams[stream_index];
1556 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1558 if((unsigned)st->nb_index_entries >= max_entries){
1560 for(i=0; 2*i<st->nb_index_entries; i++)
1561 st->index_entries[i]= st->index_entries[2*i];
1562 st->nb_index_entries= i;
1566 int ff_add_index_entry(AVIndexEntry **index_entries,
1567 int *nb_index_entries,
1568 unsigned int *index_entries_allocated_size,
1569 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1571 AVIndexEntry *entries, *ie;
1574 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1577 if(timestamp == AV_NOPTS_VALUE)
1578 return AVERROR(EINVAL);
1580 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1581 timestamp -= RELATIVE_TS_BASE;
1583 entries = av_fast_realloc(*index_entries,
1584 index_entries_allocated_size,
1585 (*nb_index_entries + 1) *
1586 sizeof(AVIndexEntry));
1590 *index_entries= entries;
1592 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1595 index= (*nb_index_entries)++;
1596 ie= &entries[index];
1597 assert(index==0 || ie[-1].timestamp < timestamp);
1599 ie= &entries[index];
1600 if(ie->timestamp != timestamp){
1601 if(ie->timestamp <= timestamp)
1603 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1604 (*nb_index_entries)++;
1605 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1606 distance= ie->min_distance;
1610 ie->timestamp = timestamp;
1611 ie->min_distance= distance;
1618 int av_add_index_entry(AVStream *st,
1619 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1621 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1622 &st->index_entries_allocated_size, pos,
1623 timestamp, size, distance, flags);
1626 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1627 int64_t wanted_timestamp, int flags)
1635 //optimize appending index entries at the end
1636 if(b && entries[b-1].timestamp < wanted_timestamp)
1641 timestamp = entries[m].timestamp;
1642 if(timestamp >= wanted_timestamp)
1644 if(timestamp <= wanted_timestamp)
1647 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1649 if(!(flags & AVSEEK_FLAG_ANY)){
1650 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1651 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1660 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1663 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1664 wanted_timestamp, flags);
1667 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1669 AVInputFormat *avif= s->iformat;
1670 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1671 int64_t ts_min, ts_max, ts;
1676 if (stream_index < 0)
1679 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1682 ts_min= AV_NOPTS_VALUE;
1683 pos_limit= -1; //gcc falsely says it may be uninitialized
1685 st= s->streams[stream_index];
1686 if(st->index_entries){
1689 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()
1690 index= FFMAX(index, 0);
1691 e= &st->index_entries[index];
1693 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1695 ts_min= e->timestamp;
1696 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1697 pos_min, av_ts2str(ts_min));
1702 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1703 assert(index < st->nb_index_entries);
1705 e= &st->index_entries[index];
1706 assert(e->timestamp >= target_ts);
1708 ts_max= e->timestamp;
1709 pos_limit= pos_max - e->min_distance;
1710 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1711 pos_max, pos_limit, av_ts2str(ts_max));
1715 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1720 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1723 ff_read_frame_flush(s);
1724 ff_update_cur_dts(s, st, ts);
1729 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1730 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1731 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1732 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1735 int64_t start_pos, filesize;
1738 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1740 if(ts_min == AV_NOPTS_VALUE){
1741 pos_min = s->data_offset;
1742 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1743 if (ts_min == AV_NOPTS_VALUE)
1747 if(ts_min >= target_ts){
1752 if(ts_max == AV_NOPTS_VALUE){
1754 filesize = avio_size(s->pb);
1755 pos_max = filesize - 1;
1758 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1760 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1761 if (ts_max == AV_NOPTS_VALUE)
1765 int64_t tmp_pos= pos_max + 1;
1766 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1767 if(tmp_ts == AV_NOPTS_VALUE)
1771 if(tmp_pos >= filesize)
1777 if(ts_max <= target_ts){
1782 if(ts_min > ts_max){
1784 }else if(ts_min == ts_max){
1789 while (pos_min < pos_limit) {
1790 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1791 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1792 assert(pos_limit <= pos_max);
1795 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1796 // interpolate position (better than dichotomy)
1797 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1798 + pos_min - approximate_keyframe_distance;
1799 }else if(no_change==1){
1800 // bisection, if interpolation failed to change min or max pos last time
1801 pos = (pos_min + pos_limit)>>1;
1803 /* linear search if bisection failed, can only happen if there
1804 are very few or no keyframes between min/max */
1809 else if(pos > pos_limit)
1813 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1818 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1819 pos_min, pos, pos_max,
1820 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1821 pos_limit, start_pos, no_change);
1822 if(ts == AV_NOPTS_VALUE){
1823 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1826 assert(ts != AV_NOPTS_VALUE);
1827 if (target_ts <= ts) {
1828 pos_limit = start_pos - 1;
1832 if (target_ts >= ts) {
1838 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1839 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1842 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1844 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1845 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1846 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1852 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1853 int64_t pos_min, pos_max;
1855 pos_min = s->data_offset;
1856 pos_max = avio_size(s->pb) - 1;
1858 if (pos < pos_min) pos= pos_min;
1859 else if(pos > pos_max) pos= pos_max;
1861 avio_seek(s->pb, pos, SEEK_SET);
1866 static int seek_frame_generic(AVFormatContext *s,
1867 int stream_index, int64_t timestamp, int flags)
1874 st = s->streams[stream_index];
1876 index = av_index_search_timestamp(st, timestamp, flags);
1878 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1881 if(index < 0 || index==st->nb_index_entries-1){
1885 if(st->nb_index_entries){
1886 assert(st->index_entries);
1887 ie= &st->index_entries[st->nb_index_entries-1];
1888 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1890 ff_update_cur_dts(s, st, ie->timestamp);
1892 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1898 read_status = av_read_frame(s, &pkt);
1899 } while (read_status == AVERROR(EAGAIN));
1900 if (read_status < 0)
1902 av_free_packet(&pkt);
1903 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1904 if(pkt.flags & AV_PKT_FLAG_KEY)
1906 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1907 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);
1912 index = av_index_search_timestamp(st, timestamp, flags);
1917 ff_read_frame_flush(s);
1918 if (s->iformat->read_seek){
1919 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1922 ie = &st->index_entries[index];
1923 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1925 ff_update_cur_dts(s, st, ie->timestamp);
1930 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1931 int64_t timestamp, int flags)
1936 if (flags & AVSEEK_FLAG_BYTE) {
1937 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1939 ff_read_frame_flush(s);
1940 return seek_frame_byte(s, stream_index, timestamp, flags);
1943 if(stream_index < 0){
1944 stream_index= av_find_default_stream_index(s);
1945 if(stream_index < 0)
1948 st= s->streams[stream_index];
1949 /* timestamp for default must be expressed in AV_TIME_BASE units */
1950 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1953 /* first, we try the format specific seek */
1954 if (s->iformat->read_seek) {
1955 ff_read_frame_flush(s);
1956 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1963 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1964 ff_read_frame_flush(s);
1965 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1966 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1967 ff_read_frame_flush(s);
1968 return seek_frame_generic(s, stream_index, timestamp, flags);
1974 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1976 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1979 avformat_queue_attached_pictures(s);
1984 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1986 if(min_ts > ts || max_ts < ts)
1989 if (s->iformat->read_seek2) {
1991 ff_read_frame_flush(s);
1992 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1995 avformat_queue_attached_pictures(s);
1999 if(s->iformat->read_timestamp){
2000 //try to seek via read_timestamp()
2003 //Fallback to old API if new is not implemented but old is
2004 //Note the old has somewhat different semantics
2005 if (s->iformat->read_seek || 1) {
2006 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2007 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2008 if (ret<0 && ts != min_ts && max_ts != ts) {
2009 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2011 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2016 // try some generic seek like seek_frame_generic() but with new ts semantics
2019 /*******************************************************/
2022 * Return TRUE if the stream has accurate duration in any stream.
2024 * @return TRUE if the stream has accurate duration for at least one component.
2026 static int has_duration(AVFormatContext *ic)
2031 for(i = 0;i < ic->nb_streams; i++) {
2032 st = ic->streams[i];
2033 if (st->duration != AV_NOPTS_VALUE)
2036 if (ic->duration != AV_NOPTS_VALUE)
2042 * Estimate the stream timings from the one of each components.
2044 * Also computes the global bitrate if possible.
2046 static void update_stream_timings(AVFormatContext *ic)
2048 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2049 int64_t duration, duration1, filesize;
2054 start_time = INT64_MAX;
2055 start_time_text = INT64_MAX;
2056 end_time = INT64_MIN;
2057 duration = INT64_MIN;
2058 for(i = 0;i < ic->nb_streams; i++) {
2059 st = ic->streams[i];
2060 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2061 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2062 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2063 if (start_time1 < start_time_text)
2064 start_time_text = start_time1;
2066 start_time = FFMIN(start_time, start_time1);
2067 end_time1 = AV_NOPTS_VALUE;
2068 if (st->duration != AV_NOPTS_VALUE) {
2069 end_time1 = start_time1
2070 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2071 end_time = FFMAX(end_time, end_time1);
2073 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2074 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2075 p->start_time = start_time1;
2076 if(p->end_time < end_time1)
2077 p->end_time = end_time1;
2080 if (st->duration != AV_NOPTS_VALUE) {
2081 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2082 duration = FFMAX(duration, duration1);
2085 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2086 start_time = start_time_text;
2087 else if(start_time > start_time_text)
2088 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2090 if (start_time != INT64_MAX) {
2091 ic->start_time = start_time;
2092 if (end_time != INT64_MIN) {
2093 if (ic->nb_programs) {
2094 for (i=0; i<ic->nb_programs; i++) {
2095 p = ic->programs[i];
2096 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2097 duration = FFMAX(duration, p->end_time - p->start_time);
2100 duration = FFMAX(duration, end_time - start_time);
2103 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2104 ic->duration = duration;
2106 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2107 /* compute the bitrate */
2108 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2109 (double)ic->duration;
2113 static void fill_all_stream_timings(AVFormatContext *ic)
2118 update_stream_timings(ic);
2119 for(i = 0;i < ic->nb_streams; i++) {
2120 st = ic->streams[i];
2121 if (st->start_time == AV_NOPTS_VALUE) {
2122 if(ic->start_time != AV_NOPTS_VALUE)
2123 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2124 if(ic->duration != AV_NOPTS_VALUE)
2125 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2130 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2132 int64_t filesize, duration;
2136 /* if bit_rate is already set, we believe it */
2137 if (ic->bit_rate <= 0) {
2139 for(i=0;i<ic->nb_streams;i++) {
2140 st = ic->streams[i];
2141 if (st->codec->bit_rate > 0)
2142 bit_rate += st->codec->bit_rate;
2144 ic->bit_rate = bit_rate;
2147 /* if duration is already set, we believe it */
2148 if (ic->duration == AV_NOPTS_VALUE &&
2149 ic->bit_rate != 0) {
2150 filesize = ic->pb ? avio_size(ic->pb) : 0;
2152 for(i = 0; i < ic->nb_streams; i++) {
2153 st = ic->streams[i];
2154 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2155 if (st->duration == AV_NOPTS_VALUE)
2156 st->duration = duration;
2162 #define DURATION_MAX_READ_SIZE 250000LL
2163 #define DURATION_MAX_RETRY 4
2165 /* only usable for MPEG-PS streams */
2166 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2168 AVPacket pkt1, *pkt = &pkt1;
2170 int read_size, i, ret;
2172 int64_t filesize, offset, duration;
2175 /* flush packet queue */
2176 flush_packet_queue(ic);
2178 for (i=0; i<ic->nb_streams; i++) {
2179 st = ic->streams[i];
2180 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2181 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2184 av_parser_close(st->parser);
2189 /* estimate the end time (duration) */
2190 /* XXX: may need to support wrapping */
2191 filesize = ic->pb ? avio_size(ic->pb) : 0;
2192 end_time = AV_NOPTS_VALUE;
2194 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2198 avio_seek(ic->pb, offset, SEEK_SET);
2201 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2205 ret = ff_read_packet(ic, pkt);
2206 } while(ret == AVERROR(EAGAIN));
2209 read_size += pkt->size;
2210 st = ic->streams[pkt->stream_index];
2211 if (pkt->pts != AV_NOPTS_VALUE &&
2212 (st->start_time != AV_NOPTS_VALUE ||
2213 st->first_dts != AV_NOPTS_VALUE)) {
2214 duration = end_time = pkt->pts;
2215 if (st->start_time != AV_NOPTS_VALUE)
2216 duration -= st->start_time;
2218 duration -= st->first_dts;
2220 duration += 1LL<<st->pts_wrap_bits;
2222 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2223 st->duration = duration;
2226 av_free_packet(pkt);
2228 }while( end_time==AV_NOPTS_VALUE
2229 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2230 && ++retry <= DURATION_MAX_RETRY);
2232 fill_all_stream_timings(ic);
2234 avio_seek(ic->pb, old_offset, SEEK_SET);
2235 for (i=0; i<ic->nb_streams; i++) {
2237 st->cur_dts= st->first_dts;
2238 st->last_IP_pts = AV_NOPTS_VALUE;
2239 st->reference_dts = AV_NOPTS_VALUE;
2243 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2247 /* get the file size, if possible */
2248 if (ic->iformat->flags & AVFMT_NOFILE) {
2251 file_size = avio_size(ic->pb);
2252 file_size = FFMAX(0, file_size);
2255 if ((!strcmp(ic->iformat->name, "mpeg") ||
2256 !strcmp(ic->iformat->name, "mpegts")) &&
2257 file_size && ic->pb->seekable) {
2258 /* get accurate estimate from the PTSes */
2259 estimate_timings_from_pts(ic, old_offset);
2260 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2261 } else if (has_duration(ic)) {
2262 /* at least one component has timings - we use them for all
2264 fill_all_stream_timings(ic);
2265 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2267 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2268 /* less precise: use bitrate info */
2269 estimate_timings_from_bit_rate(ic);
2270 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2272 update_stream_timings(ic);
2276 AVStream av_unused *st;
2277 for(i = 0;i < ic->nb_streams; i++) {
2278 st = ic->streams[i];
2279 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2280 (double) st->start_time / AV_TIME_BASE,
2281 (double) st->duration / AV_TIME_BASE);
2283 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2284 (double) ic->start_time / AV_TIME_BASE,
2285 (double) ic->duration / AV_TIME_BASE,
2286 ic->bit_rate / 1000);
2290 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2292 AVCodecContext *avctx = st->codec;
2294 #define FAIL(errmsg) do { \
2296 *errmsg_ptr = errmsg; \
2300 switch (avctx->codec_type) {
2301 case AVMEDIA_TYPE_AUDIO:
2302 if (!avctx->frame_size && determinable_frame_size(avctx))
2303 FAIL("unspecified frame size");
2304 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2305 FAIL("unspecified sample format");
2306 if (!avctx->sample_rate)
2307 FAIL("unspecified sample rate");
2308 if (!avctx->channels)
2309 FAIL("unspecified number of channels");
2310 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2311 FAIL("no decodable DTS frames");
2313 case AVMEDIA_TYPE_VIDEO:
2315 FAIL("unspecified size");
2316 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2317 FAIL("unspecified pixel format");
2319 case AVMEDIA_TYPE_SUBTITLE:
2320 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2321 FAIL("unspecified size");
2323 case AVMEDIA_TYPE_DATA:
2324 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2327 if (avctx->codec_id == AV_CODEC_ID_NONE)
2328 FAIL("unknown codec");
2332 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2333 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2335 const AVCodec *codec;
2336 int got_picture = 1, ret = 0;
2337 AVFrame *frame = avcodec_alloc_frame();
2338 AVSubtitle subtitle;
2339 AVPacket pkt = *avpkt;
2342 return AVERROR(ENOMEM);
2344 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2345 AVDictionary *thread_opt = NULL;
2347 codec = st->codec->codec ? st->codec->codec :
2348 avcodec_find_decoder(st->codec->codec_id);
2351 st->info->found_decoder = -1;
2356 /* force thread count to 1 since the h264 decoder will not extract SPS
2357 * and PPS to extradata during multi-threaded decoding */
2358 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2359 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2361 av_dict_free(&thread_opt);
2363 st->info->found_decoder = -1;
2366 st->info->found_decoder = 1;
2367 } else if (!st->info->found_decoder)
2368 st->info->found_decoder = 1;
2370 if (st->info->found_decoder < 0) {
2375 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2377 (!has_codec_parameters(st, NULL) ||
2378 !has_decode_delay_been_guessed(st) ||
2379 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2381 avcodec_get_frame_defaults(frame);
2382 switch(st->codec->codec_type) {
2383 case AVMEDIA_TYPE_VIDEO:
2384 ret = avcodec_decode_video2(st->codec, frame,
2385 &got_picture, &pkt);
2387 case AVMEDIA_TYPE_AUDIO:
2388 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2390 case AVMEDIA_TYPE_SUBTITLE:
2391 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2392 &got_picture, &pkt);
2400 st->nb_decoded_frames++;
2407 if(!pkt.data && !got_picture)
2411 avcodec_free_frame(&frame);
2415 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2417 while (tags->id != AV_CODEC_ID_NONE) {
2425 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2428 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2429 if(tag == tags[i].tag)
2432 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2433 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2436 return AV_CODEC_ID_NONE;
2439 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2442 for(i=0; tags && tags[i]; i++){
2443 int tag= ff_codec_get_tag(tags[i], id);
2449 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2452 for(i=0; tags && tags[i]; i++){
2453 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2454 if(id!=AV_CODEC_ID_NONE) return id;
2456 return AV_CODEC_ID_NONE;
2459 static void compute_chapters_end(AVFormatContext *s)
2462 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2464 for (i = 0; i < s->nb_chapters; i++)
2465 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2466 AVChapter *ch = s->chapters[i];
2467 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2470 for (j = 0; j < s->nb_chapters; j++) {
2471 AVChapter *ch1 = s->chapters[j];
2472 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2473 if (j != i && next_start > ch->start && next_start < end)
2476 ch->end = (end == INT64_MAX) ? ch->start : end;
2480 static int get_std_framerate(int i){
2481 if(i<60*12) return (i+1)*1001;
2482 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2486 * Is the time base unreliable.
2487 * This is a heuristic to balance between quick acceptance of the values in
2488 * the headers vs. some extra checks.
2489 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2490 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2491 * And there are "variable" fps files this needs to detect as well.
2493 static int tb_unreliable(AVCodecContext *c){
2494 if( c->time_base.den >= 101L*c->time_base.num
2495 || c->time_base.den < 5L*c->time_base.num
2496 /* || c->codec_tag == AV_RL32("DIVX")
2497 || c->codec_tag == AV_RL32("XVID")*/
2498 || c->codec_tag == AV_RL32("mp4v")
2499 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2500 || c->codec_id == AV_CODEC_ID_H264
2506 #if FF_API_FORMAT_PARAMETERS
2507 int av_find_stream_info(AVFormatContext *ic)
2509 return avformat_find_stream_info(ic, NULL);
2513 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2515 int i, count, ret, read_size, j;
2517 AVPacket pkt1, *pkt;
2518 int64_t old_offset = avio_tell(ic->pb);
2519 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2520 int flush_codecs = ic->probesize > 0;
2523 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2525 for(i=0;i<ic->nb_streams;i++) {
2526 const AVCodec *codec;
2527 AVDictionary *thread_opt = NULL;
2528 st = ic->streams[i];
2530 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2531 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2532 /* if(!st->time_base.num)
2534 if(!st->codec->time_base.num)
2535 st->codec->time_base= st->time_base;
2537 //only for the split stuff
2538 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2539 st->parser = av_parser_init(st->codec->codec_id);
2541 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2542 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2543 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2544 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2546 } else if (st->need_parsing) {
2547 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2548 "%s, packets or times may be invalid.\n",
2549 avcodec_get_name(st->codec->codec_id));
2552 codec = st->codec->codec ? st->codec->codec :
2553 avcodec_find_decoder(st->codec->codec_id);
2555 /* force thread count to 1 since the h264 decoder will not extract SPS
2556 * and PPS to extradata during multi-threaded decoding */
2557 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2559 /* Ensure that subtitle_header is properly set. */
2560 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2561 && codec && !st->codec->codec)
2562 avcodec_open2(st->codec, codec, options ? &options[i]
2565 //try to just open decoders, in case this is enough to get parameters
2566 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2567 if (codec && !st->codec->codec)
2568 avcodec_open2(st->codec, codec, options ? &options[i]
2572 av_dict_free(&thread_opt);
2575 for (i=0; i<ic->nb_streams; i++) {
2576 #if FF_API_R_FRAME_RATE
2577 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2579 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2580 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2586 if (ff_check_interrupt(&ic->interrupt_callback)){
2588 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2592 /* check if one codec still needs to be handled */
2593 for(i=0;i<ic->nb_streams;i++) {
2594 int fps_analyze_framecount = 20;
2596 st = ic->streams[i];
2597 if (!has_codec_parameters(st, NULL))
2599 /* if the timebase is coarse (like the usual millisecond precision
2600 of mkv), we need to analyze more frames to reliably arrive at
2602 if (av_q2d(st->time_base) > 0.0005)
2603 fps_analyze_framecount *= 2;
2604 if (ic->fps_probe_size >= 0)
2605 fps_analyze_framecount = ic->fps_probe_size;
2606 /* variable fps and no guess at the real fps */
2607 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2608 && st->info->duration_count < fps_analyze_framecount
2609 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2611 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2613 if (st->first_dts == AV_NOPTS_VALUE &&
2614 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2615 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2618 if (i == ic->nb_streams) {
2619 /* NOTE: if the format has no header, then we need to read
2620 some packets to get most of the streams, so we cannot
2622 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2623 /* if we found the info for all the codecs, we can stop */
2625 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2630 /* we did not get all the codec info, but we read too much data */
2631 if (read_size >= ic->probesize) {
2633 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2634 for (i = 0; i < ic->nb_streams; i++)
2635 if (!ic->streams[i]->r_frame_rate.num &&
2636 ic->streams[i]->info->duration_count <= 1)
2637 av_log(ic, AV_LOG_WARNING,
2638 "Stream #%d: not enough frames to estimate rate; "
2639 "consider increasing probesize\n", i);
2643 /* NOTE: a new stream can be added there if no header in file
2644 (AVFMTCTX_NOHEADER) */
2645 ret = read_frame_internal(ic, &pkt1);
2646 if (ret == AVERROR(EAGAIN))
2654 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2657 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2658 &ic->packet_buffer_end);
2659 if ((ret = av_dup_packet(pkt)) < 0)
2660 goto find_stream_info_err;
2663 read_size += pkt->size;
2665 st = ic->streams[pkt->stream_index];
2666 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2667 /* check for non-increasing dts */
2668 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2669 st->info->fps_last_dts >= pkt->dts) {
2670 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2671 "packet %d with DTS %"PRId64", packet %d with DTS "
2672 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2673 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2674 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2676 /* check for a discontinuity in dts - if the difference in dts
2677 * is more than 1000 times the average packet duration in the sequence,
2678 * we treat it as a discontinuity */
2679 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2680 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2681 (pkt->dts - st->info->fps_last_dts) / 1000 >
2682 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2683 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2684 "packet %d with DTS %"PRId64", packet %d with DTS "
2685 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2686 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2687 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2690 /* update stored dts values */
2691 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2692 st->info->fps_first_dts = pkt->dts;
2693 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2695 st->info->fps_last_dts = pkt->dts;
2696 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2698 if (st->codec_info_nb_frames>1) {
2700 if (st->time_base.den > 0)
2701 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2702 if (st->avg_frame_rate.num > 0)
2703 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2705 if (t >= ic->max_analyze_duration) {
2706 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2709 if (pkt->duration) {
2710 st->info->codec_info_duration += pkt->duration;
2711 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2714 #if FF_API_R_FRAME_RATE
2716 int64_t last = st->info->last_dts;
2718 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2719 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2720 int64_t duration= pkt->dts - last;
2722 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2723 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2724 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2725 int framerate= get_std_framerate(i);
2726 double sdts= dts*framerate/(1001*12);
2728 int64_t ticks= llrint(sdts+j*0.5);
2729 double error= sdts - ticks + j*0.5;
2730 st->info->duration_error[j][0][i] += error;
2731 st->info->duration_error[j][1][i] += error*error;
2734 st->info->duration_count++;
2735 // ignore the first 4 values, they might have some random jitter
2736 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2737 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2739 if (pkt->dts != AV_NOPTS_VALUE)
2740 st->info->last_dts = pkt->dts;
2743 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2744 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2745 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2746 st->codec->extradata_size= i;
2747 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2748 if (!st->codec->extradata)
2749 return AVERROR(ENOMEM);
2750 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2751 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2755 /* if still no information, we try to open the codec and to
2756 decompress the frame. We try to avoid that in most cases as
2757 it takes longer and uses more memory. For MPEG-4, we need to
2758 decompress for QuickTime.
2760 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2761 least one frame of codec data, this makes sure the codec initializes
2762 the channel configuration and does not only trust the values from the container.
2764 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2766 st->codec_info_nb_frames++;
2771 AVPacket empty_pkt = { 0 };
2773 av_init_packet(&empty_pkt);
2775 ret = -1; /* we could not have all the codec parameters before EOF */
2776 for(i=0;i<ic->nb_streams;i++) {
2779 st = ic->streams[i];
2781 /* flush the decoders */
2782 if (st->info->found_decoder == 1) {
2784 err = try_decode_frame(st, &empty_pkt,
2785 (options && i < orig_nb_streams) ?
2786 &options[i] : NULL);
2787 } while (err > 0 && !has_codec_parameters(st, NULL));
2790 av_log(ic, AV_LOG_INFO,
2791 "decoding for stream %d failed\n", st->index);
2795 if (!has_codec_parameters(st, &errmsg)) {
2797 avcodec_string(buf, sizeof(buf), st->codec, 0);
2798 av_log(ic, AV_LOG_WARNING,
2799 "Could not find codec parameters for stream %d (%s): %s\n"
2800 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2808 // close codecs which were opened in try_decode_frame()
2809 for(i=0;i<ic->nb_streams;i++) {
2810 st = ic->streams[i];
2811 avcodec_close(st->codec);
2813 for(i=0;i<ic->nb_streams;i++) {
2814 st = ic->streams[i];
2815 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2816 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2817 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2818 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2819 st->codec->codec_tag= tag;
2822 /* estimate average framerate if not set by demuxer */
2823 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2825 double best_error = 0.01;
2827 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2828 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2829 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2831 /* round guessed framerate to a "standard" framerate if it's
2832 * within 1% of the original estimate*/
2833 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2834 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2835 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2837 if (error < best_error) {
2839 best_fps = std_fps.num;
2843 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2844 best_fps, 12*1001, INT_MAX);
2847 // the check for tb_unreliable() is not completely correct, since this is not about handling
2848 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2849 // ipmovie.c produces.
2850 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)
2851 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);
2852 if (st->info->duration_count && !st->r_frame_rate.num
2853 && tb_unreliable(st->codec)) {
2855 double best_error= 0.01;
2857 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2860 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2862 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2865 int n= st->info->duration_count;
2866 double a= st->info->duration_error[k][0][j] / n;
2867 double error= st->info->duration_error[k][1][j]/n - a*a;
2869 if(error < best_error && best_error> 0.000000001){
2871 num = get_std_framerate(j);
2874 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2877 // do not increase frame rate by more than 1 % in order to match a standard rate.
2878 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2879 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2882 if (!st->r_frame_rate.num){
2883 if( st->codec->time_base.den * (int64_t)st->time_base.num
2884 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2885 st->r_frame_rate.num = st->codec->time_base.den;
2886 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2888 st->r_frame_rate.num = st->time_base.den;
2889 st->r_frame_rate.den = st->time_base.num;
2892 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2893 if(!st->codec->bits_per_coded_sample)
2894 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2895 // set stream disposition based on audio service type
2896 switch (st->codec->audio_service_type) {
2897 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2898 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2899 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2900 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2901 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2902 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2903 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2904 st->disposition = AV_DISPOSITION_COMMENT; break;
2905 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2906 st->disposition = AV_DISPOSITION_KARAOKE; break;
2912 estimate_timings(ic, old_offset);
2914 compute_chapters_end(ic);
2916 find_stream_info_err:
2917 for (i=0; i < ic->nb_streams; i++) {
2918 if (ic->streams[i]->codec)
2919 ic->streams[i]->codec->thread_count = 0;
2920 av_freep(&ic->streams[i]->info);
2923 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2927 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2931 for (i = 0; i < ic->nb_programs; i++) {
2932 if (ic->programs[i] == last) {
2936 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2937 if (ic->programs[i]->stream_index[j] == s)
2938 return ic->programs[i];
2944 int av_find_best_stream(AVFormatContext *ic,
2945 enum AVMediaType type,
2946 int wanted_stream_nb,
2948 AVCodec **decoder_ret,
2951 int i, nb_streams = ic->nb_streams;
2952 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
2953 unsigned *program = NULL;
2954 AVCodec *decoder = NULL, *best_decoder = NULL;
2956 if (related_stream >= 0 && wanted_stream_nb < 0) {
2957 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2959 program = p->stream_index;
2960 nb_streams = p->nb_stream_indexes;
2963 for (i = 0; i < nb_streams; i++) {
2964 int real_stream_index = program ? program[i] : i;
2965 AVStream *st = ic->streams[real_stream_index];
2966 AVCodecContext *avctx = st->codec;
2967 if (avctx->codec_type != type)
2969 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2971 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2974 decoder = avcodec_find_decoder(st->codec->codec_id);
2977 ret = AVERROR_DECODER_NOT_FOUND;
2981 count = st->codec_info_nb_frames;
2982 bitrate = avctx->bit_rate;
2983 multiframe = FFMIN(5, count);
2984 if ((best_multiframe > multiframe) ||
2985 (best_multiframe == multiframe && best_bitrate > bitrate) ||
2986 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
2989 best_bitrate = bitrate;
2990 best_multiframe = multiframe;
2991 ret = real_stream_index;
2992 best_decoder = decoder;
2993 if (program && i == nb_streams - 1 && ret < 0) {
2995 nb_streams = ic->nb_streams;
2996 i = 0; /* no related stream found, try again with everything */
3000 *decoder_ret = best_decoder;
3004 /*******************************************************/
3006 int av_read_play(AVFormatContext *s)
3008 if (s->iformat->read_play)
3009 return s->iformat->read_play(s);
3011 return avio_pause(s->pb, 0);
3012 return AVERROR(ENOSYS);
3015 int av_read_pause(AVFormatContext *s)
3017 if (s->iformat->read_pause)
3018 return s->iformat->read_pause(s);
3020 return avio_pause(s->pb, 1);
3021 return AVERROR(ENOSYS);
3024 void ff_free_stream(AVFormatContext *s, AVStream *st){
3025 av_assert0(s->nb_streams>0);
3026 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3029 av_parser_close(st->parser);
3031 if (st->attached_pic.data)
3032 av_free_packet(&st->attached_pic);
3033 av_dict_free(&st->metadata);
3034 av_freep(&st->index_entries);
3035 av_freep(&st->codec->extradata);
3036 av_freep(&st->codec->subtitle_header);
3037 av_freep(&st->codec);
3038 av_freep(&st->priv_data);
3039 av_freep(&st->info);
3040 av_freep(&st->probe_data.buf);
3041 av_freep(&s->streams[ --s->nb_streams ]);
3044 void avformat_free_context(AVFormatContext *s)
3052 if (s->iformat && s->iformat->priv_class && s->priv_data)
3053 av_opt_free(s->priv_data);
3055 for(i=s->nb_streams-1; i>=0; i--) {
3056 ff_free_stream(s, s->streams[i]);
3058 for(i=s->nb_programs-1; i>=0; i--) {
3059 av_dict_free(&s->programs[i]->metadata);
3060 av_freep(&s->programs[i]->stream_index);
3061 av_freep(&s->programs[i]);
3063 av_freep(&s->programs);
3064 av_freep(&s->priv_data);
3065 while(s->nb_chapters--) {
3066 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3067 av_freep(&s->chapters[s->nb_chapters]);
3069 av_freep(&s->chapters);
3070 av_dict_free(&s->metadata);
3071 av_freep(&s->streams);
3075 #if FF_API_CLOSE_INPUT_FILE
3076 void av_close_input_file(AVFormatContext *s)
3078 avformat_close_input(&s);
3082 void avformat_close_input(AVFormatContext **ps)
3084 AVFormatContext *s = *ps;
3085 AVIOContext *pb = s->pb;
3087 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3088 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3091 flush_packet_queue(s);
3094 if (s->iformat->read_close)
3095 s->iformat->read_close(s);
3098 avformat_free_context(s);
3105 #if FF_API_NEW_STREAM
3106 AVStream *av_new_stream(AVFormatContext *s, int id)
3108 AVStream *st = avformat_new_stream(s, NULL);
3115 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3121 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3123 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3126 s->streams = streams;
3128 st = av_mallocz(sizeof(AVStream));
3131 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3135 st->info->last_dts = AV_NOPTS_VALUE;
3137 st->codec = avcodec_alloc_context3(c);
3139 /* no default bitrate if decoding */
3140 st->codec->bit_rate = 0;
3142 st->index = s->nb_streams;
3143 st->start_time = AV_NOPTS_VALUE;
3144 st->duration = AV_NOPTS_VALUE;
3145 /* we set the current DTS to 0 so that formats without any timestamps
3146 but durations get some timestamps, formats with some unknown
3147 timestamps have their first few packets buffered and the
3148 timestamps corrected before they are returned to the user */
3149 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3150 st->first_dts = AV_NOPTS_VALUE;
3151 st->probe_packets = MAX_PROBE_PACKETS;
3153 /* default pts setting is MPEG-like */
3154 avpriv_set_pts_info(st, 33, 1, 90000);
3155 st->last_IP_pts = AV_NOPTS_VALUE;
3156 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3157 st->pts_buffer[i]= AV_NOPTS_VALUE;
3158 st->reference_dts = AV_NOPTS_VALUE;
3160 st->sample_aspect_ratio = (AVRational){0,1};
3162 #if FF_API_R_FRAME_RATE
3163 st->info->last_dts = AV_NOPTS_VALUE;
3165 st->info->fps_first_dts = AV_NOPTS_VALUE;
3166 st->info->fps_last_dts = AV_NOPTS_VALUE;
3168 s->streams[s->nb_streams++] = st;
3172 AVProgram *av_new_program(AVFormatContext *ac, int id)
3174 AVProgram *program=NULL;
3177 av_dlog(ac, "new_program: id=0x%04x\n", id);
3179 for(i=0; i<ac->nb_programs; i++)
3180 if(ac->programs[i]->id == id)
3181 program = ac->programs[i];
3184 program = av_mallocz(sizeof(AVProgram));
3187 dynarray_add(&ac->programs, &ac->nb_programs, program);
3188 program->discard = AVDISCARD_NONE;
3192 program->start_time =
3193 program->end_time = AV_NOPTS_VALUE;
3198 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3200 AVChapter *chapter = NULL;
3203 for(i=0; i<s->nb_chapters; i++)
3204 if(s->chapters[i]->id == id)
3205 chapter = s->chapters[i];
3208 chapter= av_mallocz(sizeof(AVChapter));
3211 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3213 av_dict_set(&chapter->metadata, "title", title, 0);
3215 chapter->time_base= time_base;
3216 chapter->start = start;
3222 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3225 AVProgram *program=NULL;
3228 if (idx >= ac->nb_streams) {
3229 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3233 for(i=0; i<ac->nb_programs; i++){
3234 if(ac->programs[i]->id != progid)
3236 program = ac->programs[i];
3237 for(j=0; j<program->nb_stream_indexes; j++)
3238 if(program->stream_index[j] == idx)
3241 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3244 program->stream_index = tmp;
3245 program->stream_index[program->nb_stream_indexes++] = idx;
3250 static void print_fps(double d, const char *postfix){
3251 uint64_t v= lrintf(d*100);
3252 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3253 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3254 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3257 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3259 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3260 AVDictionaryEntry *tag=NULL;
3262 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3263 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3264 if(strcmp("language", tag->key)){
3265 const char *p = tag->value;
3266 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3269 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3270 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3271 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3273 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3274 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3277 av_log(ctx, AV_LOG_INFO, "\n");
3283 /* "user interface" functions */
3284 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3287 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3288 AVStream *st = ic->streams[i];
3289 int g = av_gcd(st->time_base.num, st->time_base.den);
3290 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3291 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3292 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3293 /* the pid is an important information, so we display it */
3294 /* XXX: add a generic system */
3295 if (flags & AVFMT_SHOW_IDS)
3296 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3298 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3299 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3300 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3301 if (st->sample_aspect_ratio.num && // default
3302 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3303 AVRational display_aspect_ratio;
3304 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3305 st->codec->width*st->sample_aspect_ratio.num,
3306 st->codec->height*st->sample_aspect_ratio.den,
3308 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3309 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3310 display_aspect_ratio.num, display_aspect_ratio.den);
3312 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3313 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3314 print_fps(av_q2d(st->avg_frame_rate), "fps");
3315 #if FF_API_R_FRAME_RATE
3316 if(st->r_frame_rate.den && st->r_frame_rate.num)
3317 print_fps(av_q2d(st->r_frame_rate), "tbr");
3319 if(st->time_base.den && st->time_base.num)
3320 print_fps(1/av_q2d(st->time_base), "tbn");
3321 if(st->codec->time_base.den && st->codec->time_base.num)
3322 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3324 if (st->disposition & AV_DISPOSITION_DEFAULT)
3325 av_log(NULL, AV_LOG_INFO, " (default)");
3326 if (st->disposition & AV_DISPOSITION_DUB)
3327 av_log(NULL, AV_LOG_INFO, " (dub)");
3328 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3329 av_log(NULL, AV_LOG_INFO, " (original)");
3330 if (st->disposition & AV_DISPOSITION_COMMENT)
3331 av_log(NULL, AV_LOG_INFO, " (comment)");
3332 if (st->disposition & AV_DISPOSITION_LYRICS)
3333 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3334 if (st->disposition & AV_DISPOSITION_KARAOKE)
3335 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3336 if (st->disposition & AV_DISPOSITION_FORCED)
3337 av_log(NULL, AV_LOG_INFO, " (forced)");
3338 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3339 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3340 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3341 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3342 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3343 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3344 av_log(NULL, AV_LOG_INFO, "\n");
3345 dump_metadata(NULL, st->metadata, " ");
3348 void av_dump_format(AVFormatContext *ic,
3354 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3355 if (ic->nb_streams && !printed)
3358 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3359 is_output ? "Output" : "Input",
3361 is_output ? ic->oformat->name : ic->iformat->name,
3362 is_output ? "to" : "from", url);
3363 dump_metadata(NULL, ic->metadata, " ");
3365 av_log(NULL, AV_LOG_INFO, " Duration: ");
3366 if (ic->duration != AV_NOPTS_VALUE) {
3367 int hours, mins, secs, us;
3368 int64_t duration = ic->duration + 5000;
3369 secs = duration / AV_TIME_BASE;
3370 us = duration % AV_TIME_BASE;
3375 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3376 (100 * us) / AV_TIME_BASE);
3378 av_log(NULL, AV_LOG_INFO, "N/A");
3380 if (ic->start_time != AV_NOPTS_VALUE) {
3382 av_log(NULL, AV_LOG_INFO, ", start: ");
3383 secs = ic->start_time / AV_TIME_BASE;
3384 us = abs(ic->start_time % AV_TIME_BASE);
3385 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3386 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3388 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3390 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3392 av_log(NULL, AV_LOG_INFO, "N/A");
3394 av_log(NULL, AV_LOG_INFO, "\n");
3396 for (i = 0; i < ic->nb_chapters; i++) {
3397 AVChapter *ch = ic->chapters[i];
3398 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3399 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3400 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3402 dump_metadata(NULL, ch->metadata, " ");
3404 if(ic->nb_programs) {
3405 int j, k, total = 0;
3406 for(j=0; j<ic->nb_programs; j++) {
3407 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3409 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3410 name ? name->value : "");
3411 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3412 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3413 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3414 printed[ic->programs[j]->stream_index[k]] = 1;
3416 total += ic->programs[j]->nb_stream_indexes;
3418 if (total < ic->nb_streams)
3419 av_log(NULL, AV_LOG_INFO, " No Program\n");
3421 for(i=0;i<ic->nb_streams;i++)
3423 dump_stream_format(ic, i, index, is_output);
3428 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3429 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3431 return av_gettime();
3435 uint64_t ff_ntp_time(void)
3437 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3440 int av_get_frame_filename(char *buf, int buf_size,
3441 const char *path, int number)
3444 char *q, buf1[20], c;
3445 int nd, len, percentd_found;
3457 while (isdigit(*p)) {
3458 nd = nd * 10 + *p++ - '0';
3461 } while (isdigit(c));
3470 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3472 if ((q - buf + len) > buf_size - 1)
3474 memcpy(q, buf1, len);
3482 if ((q - buf) < buf_size - 1)
3486 if (!percentd_found)
3495 static void hex_dump_internal(void *avcl, FILE *f, int level,
3496 const uint8_t *buf, int size)
3500 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3502 for(i=0;i<size;i+=16) {
3509 PRINT(" %02x", buf[i+j]);
3514 for(j=0;j<len;j++) {
3516 if (c < ' ' || c > '~')
3525 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3527 hex_dump_internal(NULL, f, 0, buf, size);
3530 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3532 hex_dump_internal(avcl, NULL, level, buf, size);
3535 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3538 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3539 PRINT("stream #%d:\n", pkt->stream_index);
3540 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3541 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3542 /* DTS is _always_ valid after av_read_frame() */
3544 if (pkt->dts == AV_NOPTS_VALUE)
3547 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3548 /* PTS may not be known if B-frames are present. */
3550 if (pkt->pts == AV_NOPTS_VALUE)
3553 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3555 PRINT(" size=%d\n", pkt->size);
3558 av_hex_dump(f, pkt->data, pkt->size);
3562 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3564 AVRational tb = { 1, AV_TIME_BASE };
3565 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3569 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3571 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3575 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3577 AVRational tb = { 1, AV_TIME_BASE };
3578 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3582 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3585 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3588 void av_url_split(char *proto, int proto_size,
3589 char *authorization, int authorization_size,
3590 char *hostname, int hostname_size,
3592 char *path, int path_size,
3595 const char *p, *ls, *ls2, *at, *col, *brk;
3597 if (port_ptr) *port_ptr = -1;
3598 if (proto_size > 0) proto[0] = 0;
3599 if (authorization_size > 0) authorization[0] = 0;
3600 if (hostname_size > 0) hostname[0] = 0;
3601 if (path_size > 0) path[0] = 0;
3603 /* parse protocol */
3604 if ((p = strchr(url, ':'))) {
3605 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3610 /* no protocol means plain filename */
3611 av_strlcpy(path, url, path_size);
3615 /* separate path from hostname */
3616 ls = strchr(p, '/');
3617 ls2 = strchr(p, '?');
3621 ls = FFMIN(ls, ls2);
3623 av_strlcpy(path, ls, path_size);
3625 ls = &p[strlen(p)]; // XXX
3627 /* the rest is hostname, use that to parse auth/port */
3629 /* authorization (user[:pass]@hostname) */
3630 if ((at = strchr(p, '@')) && at < ls) {
3631 av_strlcpy(authorization, p,
3632 FFMIN(authorization_size, at + 1 - p));
3633 p = at + 1; /* skip '@' */
3636 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3638 av_strlcpy(hostname, p + 1,
3639 FFMIN(hostname_size, brk - p));
3640 if (brk[1] == ':' && port_ptr)
3641 *port_ptr = atoi(brk + 2);
3642 } else if ((col = strchr(p, ':')) && col < ls) {
3643 av_strlcpy(hostname, p,
3644 FFMIN(col + 1 - p, hostname_size));
3645 if (port_ptr) *port_ptr = atoi(col + 1);
3647 av_strlcpy(hostname, p,
3648 FFMIN(ls + 1 - p, hostname_size));
3652 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3655 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3658 'C', 'D', 'E', 'F' };
3659 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3662 'c', 'd', 'e', 'f' };
3663 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3665 for(i = 0; i < s; i++) {
3666 buff[i * 2] = hex_table[src[i] >> 4];
3667 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3673 int ff_hex_to_data(uint8_t *data, const char *p)
3680 p += strspn(p, SPACE_CHARS);
3683 c = toupper((unsigned char) *p++);
3684 if (c >= '0' && c <= '9')
3686 else if (c >= 'A' && c <= 'F')
3701 #if FF_API_SET_PTS_INFO
3702 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3703 unsigned int pts_num, unsigned int pts_den)
3705 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3709 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3710 unsigned int pts_num, unsigned int pts_den)
3713 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3714 if(new_tb.num != pts_num)
3715 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3717 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3719 if(new_tb.num <= 0 || new_tb.den <= 0) {
3720 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);
3723 s->time_base = new_tb;
3724 av_codec_set_pkt_timebase(s->codec, new_tb);
3725 s->pts_wrap_bits = pts_wrap_bits;
3728 int ff_url_join(char *str, int size, const char *proto,
3729 const char *authorization, const char *hostname,
3730 int port, const char *fmt, ...)
3733 struct addrinfo hints = { 0 }, *ai;
3738 av_strlcatf(str, size, "%s://", proto);
3739 if (authorization && authorization[0])
3740 av_strlcatf(str, size, "%s@", authorization);
3741 #if CONFIG_NETWORK && defined(AF_INET6)
3742 /* Determine if hostname is a numerical IPv6 address,
3743 * properly escape it within [] in that case. */
3744 hints.ai_flags = AI_NUMERICHOST;
3745 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3746 if (ai->ai_family == AF_INET6) {
3747 av_strlcat(str, "[", size);
3748 av_strlcat(str, hostname, size);
3749 av_strlcat(str, "]", size);
3751 av_strlcat(str, hostname, size);
3756 /* Not an IPv6 address, just output the plain string. */
3757 av_strlcat(str, hostname, size);
3760 av_strlcatf(str, size, ":%d", port);
3763 int len = strlen(str);
3766 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3772 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3773 AVFormatContext *src)
3778 local_pkt.stream_index = dst_stream;
3779 if (pkt->pts != AV_NOPTS_VALUE)
3780 local_pkt.pts = av_rescale_q(pkt->pts,
3781 src->streams[pkt->stream_index]->time_base,
3782 dst->streams[dst_stream]->time_base);
3783 if (pkt->dts != AV_NOPTS_VALUE)
3784 local_pkt.dts = av_rescale_q(pkt->dts,
3785 src->streams[pkt->stream_index]->time_base,
3786 dst->streams[dst_stream]->time_base);
3787 return av_write_frame(dst, &local_pkt);
3790 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3793 const char *ptr = str;
3795 /* Parse key=value pairs. */
3798 char *dest = NULL, *dest_end;
3799 int key_len, dest_len = 0;
3801 /* Skip whitespace and potential commas. */
3802 while (*ptr && (isspace(*ptr) || *ptr == ','))
3809 if (!(ptr = strchr(key, '=')))
3812 key_len = ptr - key;
3814 callback_get_buf(context, key, key_len, &dest, &dest_len);
3815 dest_end = dest + dest_len - 1;
3819 while (*ptr && *ptr != '\"') {
3823 if (dest && dest < dest_end)
3827 if (dest && dest < dest_end)
3835 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3836 if (dest && dest < dest_end)
3844 int ff_find_stream_index(AVFormatContext *s, int id)
3847 for (i = 0; i < s->nb_streams; i++) {
3848 if (s->streams[i]->id == id)
3854 void ff_make_absolute_url(char *buf, int size, const char *base,
3857 char *sep, *path_query;
3858 /* Absolute path, relative to the current server */
3859 if (base && strstr(base, "://") && rel[0] == '/') {
3861 av_strlcpy(buf, base, size);
3862 sep = strstr(buf, "://");
3864 /* Take scheme from base url */
3865 if (rel[1] == '/') {
3868 /* Take scheme and host from base url */
3870 sep = strchr(sep, '/');
3875 av_strlcat(buf, rel, size);
3878 /* If rel actually is an absolute url, just copy it */
3879 if (!base || strstr(rel, "://") || rel[0] == '/') {
3880 av_strlcpy(buf, rel, size);
3884 av_strlcpy(buf, base, size);
3886 /* Strip off any query string from base */
3887 path_query = strchr(buf, '?');
3888 if (path_query != NULL)
3891 /* Is relative path just a new query part? */
3892 if (rel[0] == '?') {
3893 av_strlcat(buf, rel, size);
3897 /* Remove the file name from the base url */
3898 sep = strrchr(buf, '/');
3903 while (av_strstart(rel, "../", NULL) && sep) {
3904 /* Remove the path delimiter at the end */
3906 sep = strrchr(buf, '/');
3907 /* If the next directory name to pop off is "..", break here */
3908 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3909 /* Readd the slash we just removed */
3910 av_strlcat(buf, "/", size);
3913 /* Cut off the directory name */
3920 av_strlcat(buf, rel, size);
3923 int64_t ff_iso8601_to_unix_time(const char *datestr)
3925 struct tm time1 = {0}, time2 = {0};
3927 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3928 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3930 return av_timegm(&time2);
3932 return av_timegm(&time1);
3935 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3938 if (ofmt->query_codec)
3939 return ofmt->query_codec(codec_id, std_compliance);
3940 else if (ofmt->codec_tag)
3941 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3942 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3943 codec_id == ofmt->subtitle_codec)
3946 return AVERROR_PATCHWELCOME;
3949 int avformat_network_init(void)
3953 ff_network_inited_globally = 1;
3954 if ((ret = ff_network_init()) < 0)
3961 int avformat_network_deinit(void)
3970 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3971 uint64_t channel_layout, int32_t sample_rate,
3972 int32_t width, int32_t height)
3978 return AVERROR(EINVAL);
3981 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3983 if (channel_layout) {
3985 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3989 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3991 if (width || height) {
3993 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3995 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3997 return AVERROR(ENOMEM);
3998 bytestream_put_le32(&data, flags);
4000 bytestream_put_le32(&data, channels);
4002 bytestream_put_le64(&data, channel_layout);
4004 bytestream_put_le32(&data, sample_rate);
4005 if (width || height) {
4006 bytestream_put_le32(&data, width);
4007 bytestream_put_le32(&data, height);
4012 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4014 return ff_codec_bmp_tags;
4016 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4018 return ff_codec_wav_tags;
4021 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4023 AVRational undef = {0, 1};
4024 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4025 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4026 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4028 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4029 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4030 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4031 stream_sample_aspect_ratio = undef;
4033 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4034 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4035 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4036 frame_sample_aspect_ratio = undef;
4038 if (stream_sample_aspect_ratio.num)
4039 return stream_sample_aspect_ratio;
4041 return frame_sample_aspect_ratio;
4044 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4047 if (*spec <= '9' && *spec >= '0') /* opt:index */
4048 return strtol(spec, NULL, 0) == st->index;
4049 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4050 *spec == 't') { /* opt:[vasdt] */
4051 enum AVMediaType type;
4054 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4055 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4056 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4057 case 'd': type = AVMEDIA_TYPE_DATA; break;
4058 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4059 default: av_assert0(0);
4061 if (type != st->codec->codec_type)
4063 if (*spec++ == ':') { /* possibly followed by :index */
4064 int i, index = strtol(spec, NULL, 0);
4065 for (i = 0; i < s->nb_streams; i++)
4066 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4067 return i == st->index;
4071 } else if (*spec == 'p' && *(spec + 1) == ':') {
4075 prog_id = strtol(spec, &endptr, 0);
4076 for (i = 0; i < s->nb_programs; i++) {
4077 if (s->programs[i]->id != prog_id)
4080 if (*endptr++ == ':') {
4081 int stream_idx = strtol(endptr, NULL, 0);
4082 return stream_idx >= 0 &&
4083 stream_idx < s->programs[i]->nb_stream_indexes &&
4084 st->index == s->programs[i]->stream_index[stream_idx];
4087 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4088 if (st->index == s->programs[i]->stream_index[j])
4092 } else if (*spec == '#') {
4095 sid = strtol(spec + 1, &endptr, 0);
4097 return st->id == sid;
4098 } else if (!*spec) /* empty specifier, matches everything */
4101 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4102 return AVERROR(EINVAL);