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));
82 * Wrap a given time stamp, if there is an indication for an overflow
85 * @param timestamp the time stamp to wrap
86 * @return resulting time stamp
88 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
90 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
91 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
92 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
93 timestamp < st->pts_wrap_reference)
94 return timestamp + (1ULL<<st->pts_wrap_bits);
95 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
96 timestamp >= st->pts_wrap_reference)
97 return timestamp - (1ULL<<st->pts_wrap_bits);
102 /** head of registered input format linked list */
103 static AVInputFormat *first_iformat = NULL;
104 /** head of registered output format linked list */
105 static AVOutputFormat *first_oformat = NULL;
107 AVInputFormat *av_iformat_next(AVInputFormat *f)
109 if(f) return f->next;
110 else return first_iformat;
113 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
115 if(f) return f->next;
116 else return first_oformat;
119 void av_register_input_format(AVInputFormat *format)
123 while (*p != NULL) p = &(*p)->next;
128 void av_register_output_format(AVOutputFormat *format)
132 while (*p != NULL) p = &(*p)->next;
137 int av_match_ext(const char *filename, const char *extensions)
145 ext = strrchr(filename, '.');
151 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
154 if (!av_strcasecmp(ext1, ext))
164 static int match_format(const char *name, const char *names)
172 namelen = strlen(name);
173 while ((p = strchr(names, ','))) {
174 len = FFMAX(p - names, namelen);
175 if (!av_strncasecmp(name, names, len))
179 return !av_strcasecmp(name, names);
182 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
183 const char *mime_type)
185 AVOutputFormat *fmt = NULL, *fmt_found;
186 int score_max, score;
188 /* specific test for image sequences */
189 #if CONFIG_IMAGE2_MUXER
190 if (!short_name && filename &&
191 av_filename_number_test(filename) &&
192 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
193 return av_guess_format("image2", NULL, NULL);
196 /* Find the proper file type. */
199 while ((fmt = av_oformat_next(fmt))) {
201 if (fmt->name && short_name && match_format(short_name, fmt->name))
203 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
205 if (filename && fmt->extensions &&
206 av_match_ext(filename, fmt->extensions)) {
209 if (score > score_max) {
217 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
218 const char *filename, const char *mime_type, enum AVMediaType type){
219 if(type == AVMEDIA_TYPE_VIDEO){
220 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
222 #if CONFIG_IMAGE2_MUXER
223 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
224 codec_id= ff_guess_image2_codec(filename);
227 if(codec_id == AV_CODEC_ID_NONE)
228 codec_id= fmt->video_codec;
230 }else if(type == AVMEDIA_TYPE_AUDIO)
231 return fmt->audio_codec;
232 else if (type == AVMEDIA_TYPE_SUBTITLE)
233 return fmt->subtitle_codec;
235 return AV_CODEC_ID_NONE;
238 AVInputFormat *av_find_input_format(const char *short_name)
240 AVInputFormat *fmt = NULL;
241 while ((fmt = av_iformat_next(fmt))) {
242 if (match_format(short_name, fmt->name))
248 int ffio_limit(AVIOContext *s, int size)
251 int64_t remaining= s->maxsize - avio_tell(s);
252 if(remaining < size){
253 int64_t newsize= avio_size(s);
254 if(!s->maxsize || s->maxsize<newsize)
255 s->maxsize= newsize - !newsize;
256 remaining= s->maxsize - avio_tell(s);
257 remaining= FFMAX(remaining, 0);
260 if(s->maxsize>=0 && remaining+1 < size){
261 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
268 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
271 int orig_size = size;
272 size= ffio_limit(s, size);
274 ret= av_new_packet(pkt, size);
279 pkt->pos= avio_tell(s);
281 ret= avio_read(s, pkt->data, size);
285 av_shrink_packet(pkt, ret);
286 if (pkt->size < orig_size)
287 pkt->flags |= AV_PKT_FLAG_CORRUPT;
292 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
297 return av_get_packet(s, pkt, size);
298 old_size = pkt->size;
299 ret = av_grow_packet(pkt, size);
302 ret = avio_read(s, pkt->data + old_size, size);
303 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
308 int av_filename_number_test(const char *filename)
311 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
314 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
316 AVProbeData lpd = *pd;
317 AVInputFormat *fmt1 = NULL, *fmt;
318 int score, nodat = 0, score_max=0;
319 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
322 lpd.buf = zerobuffer;
324 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
325 int id3len = ff_id3v2_tag_len(lpd.buf);
326 if (lpd.buf_size > id3len + 16) {
328 lpd.buf_size -= id3len;
334 while ((fmt1 = av_iformat_next(fmt1))) {
335 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
338 if (fmt1->read_probe) {
339 score = fmt1->read_probe(&lpd);
340 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
341 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
342 } else if (fmt1->extensions) {
343 if (av_match_ext(lpd.filename, fmt1->extensions)) {
347 if (score > score_max) {
350 }else if (score == score_max)
353 *score_ret= score_max;
358 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
361 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
362 if(score_ret > *score_max){
363 *score_max= score_ret;
369 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
371 return av_probe_input_format2(pd, is_opened, &score);
374 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
376 static const struct {
377 const char *name; enum AVCodecID id; enum AVMediaType type;
379 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
380 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
381 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
382 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
383 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
384 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
385 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
386 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
387 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
391 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
393 if (fmt && st->request_probe <= score) {
395 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
396 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
397 for (i = 0; fmt_id_type[i].name; i++) {
398 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
399 st->codec->codec_id = fmt_id_type[i].id;
400 st->codec->codec_type = fmt_id_type[i].type;
408 /************************************************************/
409 /* input media file */
411 int av_demuxer_open(AVFormatContext *ic){
414 if (ic->iformat->read_header) {
415 err = ic->iformat->read_header(ic);
420 if (ic->pb && !ic->data_offset)
421 ic->data_offset = avio_tell(ic->pb);
427 /** size of probe buffer, for guessing file type from file contents */
428 #define PROBE_BUF_MIN 2048
429 #define PROBE_BUF_MAX (1<<20)
431 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
432 const char *filename, void *logctx,
433 unsigned int offset, unsigned int max_probe_size)
435 AVProbeData pd = { filename ? filename : "", NULL, -offset };
436 unsigned char *buf = NULL;
438 int ret = 0, probe_size, buf_offset = 0;
440 if (!max_probe_size) {
441 max_probe_size = PROBE_BUF_MAX;
442 } else if (max_probe_size > PROBE_BUF_MAX) {
443 max_probe_size = PROBE_BUF_MAX;
444 } else if (max_probe_size < PROBE_BUF_MIN) {
445 return AVERROR(EINVAL);
448 if (offset >= max_probe_size) {
449 return AVERROR(EINVAL);
452 if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
453 if (!av_strcasecmp(mime_type, "audio/aacp")) {
454 *fmt = av_find_input_format("aac");
456 av_freep(&mime_type);
459 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
460 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
461 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
464 if (probe_size < offset) {
468 /* read probe data */
469 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
472 return AVERROR(ENOMEM);
475 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
476 /* fail if error was not end of file, otherwise, lower score */
477 if (ret != AVERROR_EOF) {
482 ret = 0; /* error was end of file, nothing read */
484 pd.buf_size = buf_offset += ret;
485 pd.buf = &buf[offset];
487 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
489 /* guess file format */
490 *fmt = av_probe_input_format2(&pd, 1, &score);
492 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
493 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
495 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
501 return AVERROR_INVALIDDATA;
504 /* rewind. reuse probe buffer to avoid seeking */
505 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
510 /* open input file and probe the format if necessary */
511 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
514 AVProbeData pd = {filename, NULL, 0};
515 int score = AVPROBE_SCORE_RETRY;
518 s->flags |= AVFMT_FLAG_CUSTOM_IO;
520 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
521 else if (s->iformat->flags & AVFMT_NOFILE)
522 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
523 "will be ignored with AVFMT_NOFILE format.\n");
527 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
528 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
531 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
532 &s->interrupt_callback, options)) < 0)
536 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
539 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
540 AVPacketList **plast_pktl){
541 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
546 (*plast_pktl)->next = pktl;
548 *packet_buffer = pktl;
550 /* add the packet in the buffered packet list */
556 void avformat_queue_attached_pictures(AVFormatContext *s)
559 for (i = 0; i < s->nb_streams; i++)
560 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
561 s->streams[i]->discard < AVDISCARD_ALL) {
562 AVPacket copy = s->streams[i]->attached_pic;
563 copy.destruct = NULL;
564 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
568 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
570 AVFormatContext *s = *ps;
572 AVDictionary *tmp = NULL;
573 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
575 if (!s && !(s = avformat_alloc_context()))
576 return AVERROR(ENOMEM);
578 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
579 return AVERROR(EINVAL);
585 av_dict_copy(&tmp, *options, 0);
587 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
590 if ((ret = init_input(s, filename, &tmp)) < 0)
592 avio_skip(s->pb, s->skip_initial_bytes);
594 /* check filename in case an image number is expected */
595 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
596 if (!av_filename_number_test(filename)) {
597 ret = AVERROR(EINVAL);
602 s->duration = s->start_time = AV_NOPTS_VALUE;
603 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
605 /* allocate private data */
606 if (s->iformat->priv_data_size > 0) {
607 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
608 ret = AVERROR(ENOMEM);
611 if (s->iformat->priv_class) {
612 *(const AVClass**)s->priv_data = s->iformat->priv_class;
613 av_opt_set_defaults(s->priv_data);
614 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
619 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
621 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
623 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
624 if ((ret = s->iformat->read_header(s)) < 0)
627 if (id3v2_extra_meta) {
628 if (!strcmp(s->iformat->name, "mp3")) {
629 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
632 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
634 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
636 avformat_queue_attached_pictures(s);
638 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
639 s->data_offset = avio_tell(s->pb);
641 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
644 av_dict_free(options);
651 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
653 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
655 avformat_free_context(s);
660 /*******************************************************/
662 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
664 if(st->request_probe>0){
665 AVProbeData *pd = &st->probe_data;
667 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
671 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
675 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
676 pd->buf_size += pkt->size;
677 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
680 st->probe_packets = 0;
682 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
687 end= s->raw_packet_buffer_remaining_size <= 0
688 || st->probe_packets<=0;
690 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
691 int score= set_codec_from_probe_data(s, st, pd);
692 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
696 st->request_probe= -1;
697 if(st->codec->codec_id != AV_CODEC_ID_NONE){
698 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
700 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
706 static void force_codec_ids(AVFormatContext *s, AVStream *st)
708 switch(st->codec->codec_type){
709 case AVMEDIA_TYPE_VIDEO:
710 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
712 case AVMEDIA_TYPE_AUDIO:
713 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
715 case AVMEDIA_TYPE_SUBTITLE:
716 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
721 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
727 AVPacketList *pktl = s->raw_packet_buffer;
731 st = s->streams[pkt->stream_index];
732 if(st->request_probe <= 0){
733 s->raw_packet_buffer = pktl->next;
734 s->raw_packet_buffer_remaining_size += pkt->size;
743 ret= s->iformat->read_packet(s, pkt);
745 if (!pktl || ret == AVERROR(EAGAIN))
747 for (i = 0; i < s->nb_streams; i++) {
749 if (st->probe_packets) {
750 probe_codec(s, st, NULL);
752 av_assert0(st->request_probe <= 0);
757 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
758 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
759 av_log(s, AV_LOG_WARNING,
760 "Dropped corrupted packet (stream = %d)\n",
766 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
767 av_packet_merge_side_data(pkt);
769 if(pkt->stream_index >= (unsigned)s->nb_streams){
770 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
774 st= s->streams[pkt->stream_index];
775 pkt->dts = wrap_timestamp(st, pkt->dts);
776 pkt->pts = wrap_timestamp(st, pkt->pts);
778 force_codec_ids(s, st);
780 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
781 if (s->use_wallclock_as_timestamps)
782 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
784 if(!pktl && st->request_probe <= 0)
787 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
788 s->raw_packet_buffer_remaining_size -= pkt->size;
790 probe_codec(s, st, pkt);
794 #if FF_API_READ_PACKET
795 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
797 return ff_read_packet(s, pkt);
802 /**********************************************************/
804 static int determinable_frame_size(AVCodecContext *avctx)
806 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
807 avctx->codec_id == AV_CODEC_ID_MP1 ||
808 avctx->codec_id == AV_CODEC_ID_MP2 ||
809 avctx->codec_id == AV_CODEC_ID_MP3/* ||
810 avctx->codec_id == AV_CODEC_ID_CELT*/)
816 * Get the number of samples of an audio frame. Return -1 on error.
818 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
822 /* give frame_size priority if demuxing */
823 if (!mux && enc->frame_size > 1)
824 return enc->frame_size;
826 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
829 /* fallback to using frame_size if muxing */
830 if (enc->frame_size > 1)
831 return enc->frame_size;
838 * Return the frame duration in seconds. Return 0 if not available.
840 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
841 AVCodecParserContext *pc, AVPacket *pkt)
847 switch(st->codec->codec_type) {
848 case AVMEDIA_TYPE_VIDEO:
849 if (st->r_frame_rate.num && !pc) {
850 *pnum = st->r_frame_rate.den;
851 *pden = st->r_frame_rate.num;
852 } else if(st->time_base.num*1000LL > st->time_base.den) {
853 *pnum = st->time_base.num;
854 *pden = st->time_base.den;
855 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
856 *pnum = st->codec->time_base.num;
857 *pden = st->codec->time_base.den;
858 if (pc && pc->repeat_pict) {
859 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
860 *pden /= 1 + pc->repeat_pict;
862 *pnum *= 1 + pc->repeat_pict;
864 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
865 //Thus if we have no parser in such case leave duration undefined.
866 if(st->codec->ticks_per_frame>1 && !pc){
871 case AVMEDIA_TYPE_AUDIO:
872 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
873 if (frame_size <= 0 || st->codec->sample_rate <= 0)
876 *pden = st->codec->sample_rate;
883 static int is_intra_only(AVCodecContext *enc){
884 const AVCodecDescriptor *desc;
886 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
889 desc = av_codec_get_codec_descriptor(enc);
891 desc = avcodec_descriptor_get(enc->codec_id);
892 av_codec_set_codec_descriptor(enc, desc);
895 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
899 static int has_decode_delay_been_guessed(AVStream *st)
901 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
902 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
904 #if CONFIG_H264_DECODER
905 if(st->codec->has_b_frames &&
906 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
909 if(st->codec->has_b_frames<3)
910 return st->nb_decoded_frames >= 7;
911 else if(st->codec->has_b_frames<4)
912 return st->nb_decoded_frames >= 18;
914 return st->nb_decoded_frames >= 20;
917 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
921 if (pktl == s->parse_queue_end)
922 return s->packet_buffer;
926 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index)
928 if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
929 st->pts_wrap_reference == AV_NOPTS_VALUE && st->first_dts != AV_NOPTS_VALUE) {
932 // reference time stamp should be 60 s before first time stamp
933 int64_t pts_wrap_reference = st->first_dts - av_rescale(60, st->time_base.den, st->time_base.num);
934 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
935 int pts_wrap_behavior = (st->first_dts < (1LL<<st->pts_wrap_bits) - (1LL<<st->pts_wrap_bits-3)) ||
936 (st->first_dts < (1LL<<st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
937 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
939 AVProgram *first_program = av_find_program_from_stream(s, NULL, stream_index);
941 if (!first_program) {
942 int default_stream_index = av_find_default_stream_index(s);
943 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
944 for (i=0; i<s->nb_streams; i++) {
945 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
946 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
950 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
951 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
955 AVProgram *program = first_program;
957 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
958 pts_wrap_reference = program->pts_wrap_reference;
959 pts_wrap_behavior = program->pts_wrap_behavior;
962 program = av_find_program_from_stream(s, program, stream_index);
965 // update every program with differing pts_wrap_reference
966 program = first_program;
968 if (program->pts_wrap_reference != pts_wrap_reference) {
969 for (i=0; i<program->nb_stream_indexes; i++) {
970 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
971 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
974 program->pts_wrap_reference = pts_wrap_reference;
975 program->pts_wrap_behavior = pts_wrap_behavior;
977 program = av_find_program_from_stream(s, program, stream_index);
985 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
986 int64_t dts, int64_t pts, AVPacket *pkt)
988 AVStream *st= s->streams[stream_index];
989 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
990 int64_t pts_buffer[MAX_REORDER_DELAY+1];
994 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
997 delay = st->codec->has_b_frames;
998 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
1000 shift = st->first_dts - RELATIVE_TS_BASE;
1002 for (i=0; i<MAX_REORDER_DELAY+1; i++)
1003 pts_buffer[i] = AV_NOPTS_VALUE;
1005 if (is_relative(pts))
1008 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1009 if(pktl->pkt.stream_index != stream_index)
1011 if(is_relative(pktl->pkt.pts))
1012 pktl->pkt.pts += shift;
1014 if(is_relative(pktl->pkt.dts))
1015 pktl->pkt.dts += shift;
1017 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
1018 st->start_time= pktl->pkt.pts;
1020 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1021 pts_buffer[0]= pktl->pkt.pts;
1022 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
1023 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
1024 if(pktl->pkt.dts == AV_NOPTS_VALUE)
1025 pktl->pkt.dts= pts_buffer[0];
1029 if (update_wrap_reference(s, st, stream_index) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
1030 // correct first time stamps to negative values
1031 st->first_dts = wrap_timestamp(st, st->first_dts);
1032 st->cur_dts = wrap_timestamp(st, st->cur_dts);
1033 pkt->dts = wrap_timestamp(st, pkt->dts);
1034 pkt->pts = wrap_timestamp(st, pkt->pts);
1035 pts = wrap_timestamp(st, pts);
1038 if (st->start_time == AV_NOPTS_VALUE)
1039 st->start_time = pts;
1042 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1043 int stream_index, int duration)
1045 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1046 int64_t cur_dts= RELATIVE_TS_BASE;
1048 if(st->first_dts != AV_NOPTS_VALUE){
1049 cur_dts= st->first_dts;
1050 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1051 if(pktl->pkt.stream_index == stream_index){
1052 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
1054 cur_dts -= duration;
1057 if(pktl && pktl->pkt.dts != st->first_dts) {
1058 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));
1062 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
1065 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1066 st->first_dts = cur_dts;
1067 }else if(st->cur_dts != RELATIVE_TS_BASE)
1070 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1071 if(pktl->pkt.stream_index != stream_index)
1073 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
1074 && !pktl->pkt.duration){
1075 pktl->pkt.dts= cur_dts;
1076 if(!st->codec->has_b_frames)
1077 pktl->pkt.pts= cur_dts;
1078 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1079 pktl->pkt.duration = duration;
1082 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1085 st->cur_dts= cur_dts;
1088 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1089 AVCodecParserContext *pc, AVPacket *pkt)
1091 int num, den, presentation_delayed, delay, i;
1094 if (s->flags & AVFMT_FLAG_NOFILLIN)
1097 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1098 pkt->dts= AV_NOPTS_VALUE;
1100 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1101 //FIXME Set low_delay = 0 when has_b_frames = 1
1102 st->codec->has_b_frames = 1;
1104 /* do we have a video B-frame ? */
1105 delay= st->codec->has_b_frames;
1106 presentation_delayed = 0;
1108 /* XXX: need has_b_frame, but cannot get it if the codec is
1111 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1112 presentation_delayed = 1;
1114 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){
1115 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1116 pkt->dts -= 1LL<<st->pts_wrap_bits;
1118 pkt->pts += 1LL<<st->pts_wrap_bits;
1121 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1122 // we take the conservative approach and discard both
1123 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1124 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1125 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1126 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1127 pkt->dts= AV_NOPTS_VALUE;
1130 if (pkt->duration == 0) {
1131 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1133 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1136 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1137 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1139 /* correct timestamps with byte offset if demuxers only have timestamps
1140 on packet boundaries */
1141 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1142 /* this will estimate bitrate based on this frame's duration and size */
1143 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1144 if(pkt->pts != AV_NOPTS_VALUE)
1146 if(pkt->dts != AV_NOPTS_VALUE)
1150 if (pc && pc->dts_sync_point >= 0) {
1151 // we have synchronization info from the parser
1152 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1154 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1155 if (pkt->dts != AV_NOPTS_VALUE) {
1156 // got DTS from the stream, update reference timestamp
1157 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1158 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1159 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1160 // compute DTS based on reference timestamp
1161 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1162 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1164 if (pc->dts_sync_point > 0)
1165 st->reference_dts = pkt->dts; // new reference
1169 /* This may be redundant, but it should not hurt. */
1170 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1171 presentation_delayed = 1;
1173 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1174 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1175 /* interpolate PTS and DTS if they are not present */
1176 //We skip H264 currently because delay and has_b_frames are not reliably set
1177 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1178 if (presentation_delayed) {
1179 /* DTS = decompression timestamp */
1180 /* PTS = presentation timestamp */
1181 if (pkt->dts == AV_NOPTS_VALUE)
1182 pkt->dts = st->last_IP_pts;
1183 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1184 if (pkt->dts == AV_NOPTS_VALUE)
1185 pkt->dts = st->cur_dts;
1187 /* this is tricky: the dts must be incremented by the duration
1188 of the frame we are displaying, i.e. the last I- or P-frame */
1189 if (st->last_IP_duration == 0)
1190 st->last_IP_duration = pkt->duration;
1191 if(pkt->dts != AV_NOPTS_VALUE)
1192 st->cur_dts = pkt->dts + st->last_IP_duration;
1193 st->last_IP_duration = pkt->duration;
1194 st->last_IP_pts= pkt->pts;
1195 /* cannot compute PTS if not present (we can compute it only
1196 by knowing the future */
1197 } else if (pkt->pts != AV_NOPTS_VALUE ||
1198 pkt->dts != AV_NOPTS_VALUE ||
1200 int duration = pkt->duration;
1202 /* presentation is not delayed : PTS and DTS are the same */
1203 if (pkt->pts == AV_NOPTS_VALUE)
1204 pkt->pts = pkt->dts;
1205 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1207 if (pkt->pts == AV_NOPTS_VALUE)
1208 pkt->pts = st->cur_dts;
1209 pkt->dts = pkt->pts;
1210 if (pkt->pts != AV_NOPTS_VALUE)
1211 st->cur_dts = pkt->pts + duration;
1215 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1216 st->pts_buffer[0]= pkt->pts;
1217 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1218 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1219 if(pkt->dts == AV_NOPTS_VALUE)
1220 pkt->dts= st->pts_buffer[0];
1222 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1223 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); // this should happen on the first packet
1225 if(pkt->dts > st->cur_dts)
1226 st->cur_dts = pkt->dts;
1228 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1229 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1232 if (is_intra_only(st->codec))
1233 pkt->flags |= AV_PKT_FLAG_KEY;
1235 pkt->convergence_duration = pc->convergence_duration;
1238 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1241 AVPacketList *pktl = *pkt_buf;
1242 *pkt_buf = pktl->next;
1243 av_free_packet(&pktl->pkt);
1246 *pkt_buf_end = NULL;
1250 * Parse a packet, add all split parts to parse_queue
1252 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1254 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1256 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1257 AVStream *st = s->streams[stream_index];
1258 uint8_t *data = pkt ? pkt->data : NULL;
1259 int size = pkt ? pkt->size : 0;
1260 int ret = 0, got_output = 0;
1263 av_init_packet(&flush_pkt);
1266 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1267 // preserve 0-size sync packets
1268 compute_pkt_fields(s, st, st->parser, pkt);
1271 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1274 av_init_packet(&out_pkt);
1275 len = av_parser_parse2(st->parser, st->codec,
1276 &out_pkt.data, &out_pkt.size, data, size,
1277 pkt->pts, pkt->dts, pkt->pos);
1279 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1281 /* increment read pointer */
1285 got_output = !!out_pkt.size;
1290 /* set the duration */
1291 out_pkt.duration = 0;
1292 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1293 if (st->codec->sample_rate > 0) {
1294 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1295 (AVRational){ 1, st->codec->sample_rate },
1299 } else if (st->codec->time_base.num != 0 &&
1300 st->codec->time_base.den != 0) {
1301 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1302 st->codec->time_base,
1307 out_pkt.stream_index = st->index;
1308 out_pkt.pts = st->parser->pts;
1309 out_pkt.dts = st->parser->dts;
1310 out_pkt.pos = st->parser->pos;
1312 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1313 out_pkt.pos = st->parser->frame_offset;
1315 if (st->parser->key_frame == 1 ||
1316 (st->parser->key_frame == -1 &&
1317 st->parser->pict_type == AV_PICTURE_TYPE_I))
1318 out_pkt.flags |= AV_PKT_FLAG_KEY;
1320 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1321 out_pkt.flags |= AV_PKT_FLAG_KEY;
1323 compute_pkt_fields(s, st, st->parser, &out_pkt);
1325 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1326 out_pkt.destruct = pkt->destruct;
1327 pkt->destruct = NULL;
1329 if ((ret = av_dup_packet(&out_pkt)) < 0)
1332 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1333 av_free_packet(&out_pkt);
1334 ret = AVERROR(ENOMEM);
1340 /* end of the stream => close and free the parser */
1341 if (pkt == &flush_pkt) {
1342 av_parser_close(st->parser);
1347 av_free_packet(pkt);
1351 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1352 AVPacketList **pkt_buffer_end,
1356 av_assert0(*pkt_buffer);
1359 *pkt_buffer = pktl->next;
1361 *pkt_buffer_end = NULL;
1366 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1368 int ret = 0, i, got_packet = 0;
1370 av_init_packet(pkt);
1372 while (!got_packet && !s->parse_queue) {
1376 /* read next packet */
1377 ret = ff_read_packet(s, &cur_pkt);
1379 if (ret == AVERROR(EAGAIN))
1381 /* flush the parsers */
1382 for(i = 0; i < s->nb_streams; i++) {
1384 if (st->parser && st->need_parsing)
1385 parse_packet(s, NULL, st->index);
1387 /* all remaining packets are now in parse_queue =>
1388 * really terminate parsing */
1392 st = s->streams[cur_pkt.stream_index];
1394 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1395 cur_pkt.dts != AV_NOPTS_VALUE &&
1396 cur_pkt.pts < cur_pkt.dts) {
1397 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1398 cur_pkt.stream_index,
1399 av_ts2str(cur_pkt.pts),
1400 av_ts2str(cur_pkt.dts),
1403 if (s->debug & FF_FDEBUG_TS)
1404 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1405 cur_pkt.stream_index,
1406 av_ts2str(cur_pkt.pts),
1407 av_ts2str(cur_pkt.dts),
1412 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1413 st->parser = av_parser_init(st->codec->codec_id);
1415 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1416 "%s, packets or times may be invalid.\n",
1417 avcodec_get_name(st->codec->codec_id));
1418 /* no parser available: just output the raw packets */
1419 st->need_parsing = AVSTREAM_PARSE_NONE;
1420 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1421 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1422 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1423 st->parser->flags |= PARSER_FLAG_ONCE;
1424 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1425 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1429 if (!st->need_parsing || !st->parser) {
1430 /* no parsing needed: we just output the packet as is */
1432 compute_pkt_fields(s, st, NULL, pkt);
1433 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1434 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1435 ff_reduce_index(s, st->index);
1436 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1439 } else if (st->discard < AVDISCARD_ALL) {
1440 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1444 av_free_packet(&cur_pkt);
1446 if (pkt->flags & AV_PKT_FLAG_KEY)
1447 st->skip_to_keyframe = 0;
1448 if (st->skip_to_keyframe) {
1449 av_free_packet(&cur_pkt);
1454 if (!got_packet && s->parse_queue)
1455 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1457 if(s->debug & FF_FDEBUG_TS)
1458 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1460 av_ts2str(pkt->pts),
1461 av_ts2str(pkt->dts),
1469 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1471 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1477 ret = s->packet_buffer ?
1478 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1479 read_frame_internal(s, pkt);
1486 AVPacketList *pktl = s->packet_buffer;
1489 AVPacket *next_pkt = &pktl->pkt;
1491 if (next_pkt->dts != AV_NOPTS_VALUE) {
1492 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1493 // last dts seen for this stream. if any of packets following
1494 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1495 int64_t last_dts = next_pkt->dts;
1496 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1497 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1498 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1499 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1500 next_pkt->pts = pktl->pkt.dts;
1502 if (last_dts != AV_NOPTS_VALUE) {
1503 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1504 last_dts = pktl->pkt.dts;
1509 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1510 // Fixing the last reference frame had none pts issue (For MXF etc).
1511 // We only do this when
1513 // 2. we are not able to resolve a pts value for current packet.
1514 // 3. the packets for this stream at the end of the files had valid dts.
1515 next_pkt->pts = last_dts + next_pkt->duration;
1517 pktl = s->packet_buffer;
1520 /* read packet from packet buffer, if there is data */
1521 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1522 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1523 ret = read_from_packet_buffer(&s->packet_buffer,
1524 &s->packet_buffer_end, pkt);
1529 ret = read_frame_internal(s, pkt);
1531 if (pktl && ret != AVERROR(EAGAIN)) {
1538 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1539 &s->packet_buffer_end)) < 0)
1540 return AVERROR(ENOMEM);
1545 st = s->streams[pkt->stream_index];
1546 if (st->skip_samples) {
1547 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1548 AV_WL32(p, st->skip_samples);
1549 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1550 st->skip_samples = 0;
1553 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1554 ff_reduce_index(s, st->index);
1555 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1558 if (is_relative(pkt->dts))
1559 pkt->dts -= RELATIVE_TS_BASE;
1560 if (is_relative(pkt->pts))
1561 pkt->pts -= RELATIVE_TS_BASE;
1566 /* XXX: suppress the packet queue */
1567 static void flush_packet_queue(AVFormatContext *s)
1569 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1570 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1571 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1573 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1576 /*******************************************************/
1579 int av_find_default_stream_index(AVFormatContext *s)
1581 int first_audio_index = -1;
1585 if (s->nb_streams <= 0)
1587 for(i = 0; i < s->nb_streams; i++) {
1589 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1590 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1593 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1594 first_audio_index = i;
1596 return first_audio_index >= 0 ? first_audio_index : 0;
1600 * Flush the frame reader.
1602 void ff_read_frame_flush(AVFormatContext *s)
1607 flush_packet_queue(s);
1609 /* for each stream, reset read state */
1610 for(i = 0; i < s->nb_streams; i++) {
1614 av_parser_close(st->parser);
1617 st->last_IP_pts = AV_NOPTS_VALUE;
1618 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1619 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1620 st->reference_dts = AV_NOPTS_VALUE;
1622 st->probe_packets = MAX_PROBE_PACKETS;
1624 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1625 st->pts_buffer[j]= AV_NOPTS_VALUE;
1629 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1633 for(i = 0; i < s->nb_streams; i++) {
1634 AVStream *st = s->streams[i];
1636 st->cur_dts = av_rescale(timestamp,
1637 st->time_base.den * (int64_t)ref_st->time_base.num,
1638 st->time_base.num * (int64_t)ref_st->time_base.den);
1642 void ff_reduce_index(AVFormatContext *s, int stream_index)
1644 AVStream *st= s->streams[stream_index];
1645 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1647 if((unsigned)st->nb_index_entries >= max_entries){
1649 for(i=0; 2*i<st->nb_index_entries; i++)
1650 st->index_entries[i]= st->index_entries[2*i];
1651 st->nb_index_entries= i;
1655 int ff_add_index_entry(AVIndexEntry **index_entries,
1656 int *nb_index_entries,
1657 unsigned int *index_entries_allocated_size,
1658 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1660 AVIndexEntry *entries, *ie;
1663 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1666 if(timestamp == AV_NOPTS_VALUE)
1667 return AVERROR(EINVAL);
1669 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1670 timestamp -= RELATIVE_TS_BASE;
1672 entries = av_fast_realloc(*index_entries,
1673 index_entries_allocated_size,
1674 (*nb_index_entries + 1) *
1675 sizeof(AVIndexEntry));
1679 *index_entries= entries;
1681 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1684 index= (*nb_index_entries)++;
1685 ie= &entries[index];
1686 assert(index==0 || ie[-1].timestamp < timestamp);
1688 ie= &entries[index];
1689 if(ie->timestamp != timestamp){
1690 if(ie->timestamp <= timestamp)
1692 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1693 (*nb_index_entries)++;
1694 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1695 distance= ie->min_distance;
1699 ie->timestamp = timestamp;
1700 ie->min_distance= distance;
1707 int av_add_index_entry(AVStream *st,
1708 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1710 timestamp = wrap_timestamp(st, timestamp);
1711 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1712 &st->index_entries_allocated_size, pos,
1713 timestamp, size, distance, flags);
1716 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1717 int64_t wanted_timestamp, int flags)
1725 //optimize appending index entries at the end
1726 if(b && entries[b-1].timestamp < wanted_timestamp)
1731 timestamp = entries[m].timestamp;
1732 if(timestamp >= wanted_timestamp)
1734 if(timestamp <= wanted_timestamp)
1737 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1739 if(!(flags & AVSEEK_FLAG_ANY)){
1740 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1741 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1750 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1753 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1754 wanted_timestamp, flags);
1757 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1758 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1760 return wrap_timestamp(s->streams[stream_index], read_timestamp(s, stream_index, ppos, pos_limit));
1763 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1765 AVInputFormat *avif= s->iformat;
1766 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1767 int64_t ts_min, ts_max, ts;
1772 if (stream_index < 0)
1775 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1778 ts_min= AV_NOPTS_VALUE;
1779 pos_limit= -1; //gcc falsely says it may be uninitialized
1781 st= s->streams[stream_index];
1782 if(st->index_entries){
1785 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()
1786 index= FFMAX(index, 0);
1787 e= &st->index_entries[index];
1789 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1791 ts_min= e->timestamp;
1792 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1793 pos_min, av_ts2str(ts_min));
1798 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1799 assert(index < st->nb_index_entries);
1801 e= &st->index_entries[index];
1802 assert(e->timestamp >= target_ts);
1804 ts_max= e->timestamp;
1805 pos_limit= pos_max - e->min_distance;
1806 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1807 pos_max, pos_limit, av_ts2str(ts_max));
1811 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1816 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1819 ff_read_frame_flush(s);
1820 ff_update_cur_dts(s, st, ts);
1825 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1826 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1827 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1828 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1831 int64_t start_pos, filesize;
1834 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1836 if(ts_min == AV_NOPTS_VALUE){
1837 pos_min = s->data_offset;
1838 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1839 if (ts_min == AV_NOPTS_VALUE)
1843 if(ts_min >= target_ts){
1848 if(ts_max == AV_NOPTS_VALUE){
1850 filesize = avio_size(s->pb);
1851 pos_max = filesize - 1;
1854 ts_max = ff_read_timestamp(s, stream_index, &pos_max, pos_max + step, read_timestamp);
1856 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1857 if (ts_max == AV_NOPTS_VALUE)
1861 int64_t tmp_pos= pos_max + 1;
1862 int64_t tmp_ts= ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
1863 if(tmp_ts == AV_NOPTS_VALUE)
1867 if(tmp_pos >= filesize)
1873 if(ts_max <= target_ts){
1878 if(ts_min > ts_max){
1880 }else if(ts_min == ts_max){
1885 while (pos_min < pos_limit) {
1886 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1887 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1888 assert(pos_limit <= pos_max);
1891 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1892 // interpolate position (better than dichotomy)
1893 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1894 + pos_min - approximate_keyframe_distance;
1895 }else if(no_change==1){
1896 // bisection, if interpolation failed to change min or max pos last time
1897 pos = (pos_min + pos_limit)>>1;
1899 /* linear search if bisection failed, can only happen if there
1900 are very few or no keyframes between min/max */
1905 else if(pos > pos_limit)
1909 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); //may pass pos_limit instead of -1
1914 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1915 pos_min, pos, pos_max,
1916 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1917 pos_limit, start_pos, no_change);
1918 if(ts == AV_NOPTS_VALUE){
1919 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1922 assert(ts != AV_NOPTS_VALUE);
1923 if (target_ts <= ts) {
1924 pos_limit = start_pos - 1;
1928 if (target_ts >= ts) {
1934 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1935 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1938 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1940 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1941 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1942 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1948 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1949 int64_t pos_min, pos_max;
1951 pos_min = s->data_offset;
1952 pos_max = avio_size(s->pb) - 1;
1954 if (pos < pos_min) pos= pos_min;
1955 else if(pos > pos_max) pos= pos_max;
1957 avio_seek(s->pb, pos, SEEK_SET);
1962 static int seek_frame_generic(AVFormatContext *s,
1963 int stream_index, int64_t timestamp, int flags)
1970 st = s->streams[stream_index];
1972 index = av_index_search_timestamp(st, timestamp, flags);
1974 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1977 if(index < 0 || index==st->nb_index_entries-1){
1981 if(st->nb_index_entries){
1982 assert(st->index_entries);
1983 ie= &st->index_entries[st->nb_index_entries-1];
1984 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1986 ff_update_cur_dts(s, st, ie->timestamp);
1988 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1994 read_status = av_read_frame(s, &pkt);
1995 } while (read_status == AVERROR(EAGAIN));
1996 if (read_status < 0)
1998 av_free_packet(&pkt);
1999 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
2000 if(pkt.flags & AV_PKT_FLAG_KEY)
2002 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
2003 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);
2008 index = av_index_search_timestamp(st, timestamp, flags);
2013 ff_read_frame_flush(s);
2014 if (s->iformat->read_seek){
2015 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2018 ie = &st->index_entries[index];
2019 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2021 ff_update_cur_dts(s, st, ie->timestamp);
2026 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2027 int64_t timestamp, int flags)
2032 if (flags & AVSEEK_FLAG_BYTE) {
2033 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2035 ff_read_frame_flush(s);
2036 return seek_frame_byte(s, stream_index, timestamp, flags);
2039 if(stream_index < 0){
2040 stream_index= av_find_default_stream_index(s);
2041 if(stream_index < 0)
2044 st= s->streams[stream_index];
2045 /* timestamp for default must be expressed in AV_TIME_BASE units */
2046 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
2049 /* first, we try the format specific seek */
2050 if (s->iformat->read_seek) {
2051 ff_read_frame_flush(s);
2052 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2059 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2060 ff_read_frame_flush(s);
2061 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2062 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2063 ff_read_frame_flush(s);
2064 return seek_frame_generic(s, stream_index, timestamp, flags);
2070 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2072 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
2075 avformat_queue_attached_pictures(s);
2080 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
2082 if(min_ts > ts || max_ts < ts)
2085 if (s->iformat->read_seek2) {
2087 ff_read_frame_flush(s);
2088 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2091 avformat_queue_attached_pictures(s);
2095 if(s->iformat->read_timestamp){
2096 //try to seek via read_timestamp()
2099 //Fallback to old API if new is not implemented but old is
2100 //Note the old has somewhat different semantics
2101 if (s->iformat->read_seek || 1) {
2102 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2103 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2104 if (ret<0 && ts != min_ts && max_ts != ts) {
2105 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2107 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2112 // try some generic seek like seek_frame_generic() but with new ts semantics
2115 /*******************************************************/
2118 * Return TRUE if the stream has accurate duration in any stream.
2120 * @return TRUE if the stream has accurate duration for at least one component.
2122 static int has_duration(AVFormatContext *ic)
2127 for(i = 0;i < ic->nb_streams; i++) {
2128 st = ic->streams[i];
2129 if (st->duration != AV_NOPTS_VALUE)
2132 if (ic->duration != AV_NOPTS_VALUE)
2138 * Estimate the stream timings from the one of each components.
2140 * Also computes the global bitrate if possible.
2142 static void update_stream_timings(AVFormatContext *ic)
2144 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2145 int64_t duration, duration1, filesize;
2150 start_time = INT64_MAX;
2151 start_time_text = INT64_MAX;
2152 end_time = INT64_MIN;
2153 duration = INT64_MIN;
2154 for(i = 0;i < ic->nb_streams; i++) {
2155 st = ic->streams[i];
2156 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2157 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2158 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2159 if (start_time1 < start_time_text)
2160 start_time_text = start_time1;
2162 start_time = FFMIN(start_time, start_time1);
2163 end_time1 = AV_NOPTS_VALUE;
2164 if (st->duration != AV_NOPTS_VALUE) {
2165 end_time1 = start_time1
2166 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2167 end_time = FFMAX(end_time, end_time1);
2169 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2170 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2171 p->start_time = start_time1;
2172 if(p->end_time < end_time1)
2173 p->end_time = end_time1;
2176 if (st->duration != AV_NOPTS_VALUE) {
2177 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2178 duration = FFMAX(duration, duration1);
2181 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2182 start_time = start_time_text;
2183 else if(start_time > start_time_text)
2184 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2186 if (start_time != INT64_MAX) {
2187 ic->start_time = start_time;
2188 if (end_time != INT64_MIN) {
2189 if (ic->nb_programs) {
2190 for (i=0; i<ic->nb_programs; i++) {
2191 p = ic->programs[i];
2192 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2193 duration = FFMAX(duration, p->end_time - p->start_time);
2196 duration = FFMAX(duration, end_time - start_time);
2199 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2200 ic->duration = duration;
2202 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2203 /* compute the bitrate */
2204 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2205 (double)ic->duration;
2209 static void fill_all_stream_timings(AVFormatContext *ic)
2214 update_stream_timings(ic);
2215 for(i = 0;i < ic->nb_streams; i++) {
2216 st = ic->streams[i];
2217 if (st->start_time == AV_NOPTS_VALUE) {
2218 if(ic->start_time != AV_NOPTS_VALUE)
2219 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2220 if(ic->duration != AV_NOPTS_VALUE)
2221 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2226 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2228 int64_t filesize, duration;
2232 /* if bit_rate is already set, we believe it */
2233 if (ic->bit_rate <= 0) {
2235 for(i=0;i<ic->nb_streams;i++) {
2236 st = ic->streams[i];
2237 if (st->codec->bit_rate > 0)
2238 bit_rate += st->codec->bit_rate;
2240 ic->bit_rate = bit_rate;
2243 /* if duration is already set, we believe it */
2244 if (ic->duration == AV_NOPTS_VALUE &&
2245 ic->bit_rate != 0) {
2246 filesize = ic->pb ? avio_size(ic->pb) : 0;
2248 for(i = 0; i < ic->nb_streams; i++) {
2249 st = ic->streams[i];
2250 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2251 if (st->duration == AV_NOPTS_VALUE)
2252 st->duration = duration;
2258 #define DURATION_MAX_READ_SIZE 250000LL
2259 #define DURATION_MAX_RETRY 4
2261 /* only usable for MPEG-PS streams */
2262 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2264 AVPacket pkt1, *pkt = &pkt1;
2266 int read_size, i, ret;
2268 int64_t filesize, offset, duration;
2271 /* flush packet queue */
2272 flush_packet_queue(ic);
2274 for (i=0; i<ic->nb_streams; i++) {
2275 st = ic->streams[i];
2276 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2277 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2280 av_parser_close(st->parser);
2285 /* estimate the end time (duration) */
2286 /* XXX: may need to support wrapping */
2287 filesize = ic->pb ? avio_size(ic->pb) : 0;
2288 end_time = AV_NOPTS_VALUE;
2290 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2294 avio_seek(ic->pb, offset, SEEK_SET);
2297 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2301 ret = ff_read_packet(ic, pkt);
2302 } while(ret == AVERROR(EAGAIN));
2305 read_size += pkt->size;
2306 st = ic->streams[pkt->stream_index];
2307 if (pkt->pts != AV_NOPTS_VALUE &&
2308 (st->start_time != AV_NOPTS_VALUE ||
2309 st->first_dts != AV_NOPTS_VALUE)) {
2310 duration = end_time = pkt->pts;
2311 if (st->start_time != AV_NOPTS_VALUE)
2312 duration -= st->start_time;
2314 duration -= st->first_dts;
2316 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2317 st->duration = duration;
2320 av_free_packet(pkt);
2322 }while( end_time==AV_NOPTS_VALUE
2323 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2324 && ++retry <= DURATION_MAX_RETRY);
2326 fill_all_stream_timings(ic);
2328 avio_seek(ic->pb, old_offset, SEEK_SET);
2329 for (i=0; i<ic->nb_streams; i++) {
2331 st->cur_dts= st->first_dts;
2332 st->last_IP_pts = AV_NOPTS_VALUE;
2333 st->reference_dts = AV_NOPTS_VALUE;
2337 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2341 /* get the file size, if possible */
2342 if (ic->iformat->flags & AVFMT_NOFILE) {
2345 file_size = avio_size(ic->pb);
2346 file_size = FFMAX(0, file_size);
2349 if ((!strcmp(ic->iformat->name, "mpeg") ||
2350 !strcmp(ic->iformat->name, "mpegts")) &&
2351 file_size && ic->pb->seekable) {
2352 /* get accurate estimate from the PTSes */
2353 estimate_timings_from_pts(ic, old_offset);
2354 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2355 } else if (has_duration(ic)) {
2356 /* at least one component has timings - we use them for all
2358 fill_all_stream_timings(ic);
2359 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2361 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2362 /* less precise: use bitrate info */
2363 estimate_timings_from_bit_rate(ic);
2364 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2366 update_stream_timings(ic);
2370 AVStream av_unused *st;
2371 for(i = 0;i < ic->nb_streams; i++) {
2372 st = ic->streams[i];
2373 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2374 (double) st->start_time / AV_TIME_BASE,
2375 (double) st->duration / AV_TIME_BASE);
2377 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2378 (double) ic->start_time / AV_TIME_BASE,
2379 (double) ic->duration / AV_TIME_BASE,
2380 ic->bit_rate / 1000);
2384 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2386 AVCodecContext *avctx = st->codec;
2388 #define FAIL(errmsg) do { \
2390 *errmsg_ptr = errmsg; \
2394 switch (avctx->codec_type) {
2395 case AVMEDIA_TYPE_AUDIO:
2396 if (!avctx->frame_size && determinable_frame_size(avctx))
2397 FAIL("unspecified frame size");
2398 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2399 FAIL("unspecified sample format");
2400 if (!avctx->sample_rate)
2401 FAIL("unspecified sample rate");
2402 if (!avctx->channels)
2403 FAIL("unspecified number of channels");
2404 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2405 FAIL("no decodable DTS frames");
2407 case AVMEDIA_TYPE_VIDEO:
2409 FAIL("unspecified size");
2410 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2411 FAIL("unspecified pixel format");
2413 case AVMEDIA_TYPE_SUBTITLE:
2414 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2415 FAIL("unspecified size");
2417 case AVMEDIA_TYPE_DATA:
2418 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2421 if (avctx->codec_id == AV_CODEC_ID_NONE)
2422 FAIL("unknown codec");
2426 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2427 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2429 const AVCodec *codec;
2430 int got_picture = 1, ret = 0;
2431 AVFrame *frame = avcodec_alloc_frame();
2432 AVSubtitle subtitle;
2433 AVPacket pkt = *avpkt;
2436 return AVERROR(ENOMEM);
2438 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2439 AVDictionary *thread_opt = NULL;
2441 codec = st->codec->codec ? st->codec->codec :
2442 avcodec_find_decoder(st->codec->codec_id);
2445 st->info->found_decoder = -1;
2450 /* force thread count to 1 since the h264 decoder will not extract SPS
2451 * and PPS to extradata during multi-threaded decoding */
2452 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2453 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2455 av_dict_free(&thread_opt);
2457 st->info->found_decoder = -1;
2460 st->info->found_decoder = 1;
2461 } else if (!st->info->found_decoder)
2462 st->info->found_decoder = 1;
2464 if (st->info->found_decoder < 0) {
2469 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2471 (!has_codec_parameters(st, NULL) ||
2472 !has_decode_delay_been_guessed(st) ||
2473 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2475 avcodec_get_frame_defaults(frame);
2476 switch(st->codec->codec_type) {
2477 case AVMEDIA_TYPE_VIDEO:
2478 ret = avcodec_decode_video2(st->codec, frame,
2479 &got_picture, &pkt);
2481 case AVMEDIA_TYPE_AUDIO:
2482 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2484 case AVMEDIA_TYPE_SUBTITLE:
2485 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2486 &got_picture, &pkt);
2494 st->nb_decoded_frames++;
2501 if(!pkt.data && !got_picture)
2505 avcodec_free_frame(&frame);
2509 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2511 while (tags->id != AV_CODEC_ID_NONE) {
2519 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2522 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2523 if(tag == tags[i].tag)
2526 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2527 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2530 return AV_CODEC_ID_NONE;
2533 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2537 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2538 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2539 default: return AV_CODEC_ID_NONE;
2544 if (sflags & (1 << (bps - 1))) {
2546 case 1: return AV_CODEC_ID_PCM_S8;
2547 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2548 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2549 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2550 default: return AV_CODEC_ID_NONE;
2554 case 1: return AV_CODEC_ID_PCM_U8;
2555 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2556 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2557 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2558 default: return AV_CODEC_ID_NONE;
2564 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2567 for(i=0; tags && tags[i]; i++){
2568 int tag= ff_codec_get_tag(tags[i], id);
2574 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2577 for(i=0; tags && tags[i]; i++){
2578 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2579 if(id!=AV_CODEC_ID_NONE) return id;
2581 return AV_CODEC_ID_NONE;
2584 static void compute_chapters_end(AVFormatContext *s)
2587 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2589 for (i = 0; i < s->nb_chapters; i++)
2590 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2591 AVChapter *ch = s->chapters[i];
2592 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2595 for (j = 0; j < s->nb_chapters; j++) {
2596 AVChapter *ch1 = s->chapters[j];
2597 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2598 if (j != i && next_start > ch->start && next_start < end)
2601 ch->end = (end == INT64_MAX) ? ch->start : end;
2605 static int get_std_framerate(int i){
2606 if(i<60*12) return (i+1)*1001;
2607 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2611 * Is the time base unreliable.
2612 * This is a heuristic to balance between quick acceptance of the values in
2613 * the headers vs. some extra checks.
2614 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2615 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2616 * And there are "variable" fps files this needs to detect as well.
2618 static int tb_unreliable(AVCodecContext *c){
2619 if( c->time_base.den >= 101L*c->time_base.num
2620 || c->time_base.den < 5L*c->time_base.num
2621 /* || c->codec_tag == AV_RL32("DIVX")
2622 || c->codec_tag == AV_RL32("XVID")*/
2623 || c->codec_tag == AV_RL32("mp4v")
2624 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2625 || c->codec_id == AV_CODEC_ID_H264
2631 #if FF_API_FORMAT_PARAMETERS
2632 int av_find_stream_info(AVFormatContext *ic)
2634 return avformat_find_stream_info(ic, NULL);
2638 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2640 int i, count, ret, read_size, j;
2642 AVPacket pkt1, *pkt;
2643 int64_t old_offset = avio_tell(ic->pb);
2644 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2645 int flush_codecs = ic->probesize > 0;
2648 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2650 for(i=0;i<ic->nb_streams;i++) {
2651 const AVCodec *codec;
2652 AVDictionary *thread_opt = NULL;
2653 st = ic->streams[i];
2655 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2656 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2657 /* if(!st->time_base.num)
2659 if(!st->codec->time_base.num)
2660 st->codec->time_base= st->time_base;
2662 //only for the split stuff
2663 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2664 st->parser = av_parser_init(st->codec->codec_id);
2666 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2667 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2668 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2669 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2671 } else if (st->need_parsing) {
2672 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2673 "%s, packets or times may be invalid.\n",
2674 avcodec_get_name(st->codec->codec_id));
2677 codec = st->codec->codec ? st->codec->codec :
2678 avcodec_find_decoder(st->codec->codec_id);
2680 /* force thread count to 1 since the h264 decoder will not extract SPS
2681 * and PPS to extradata during multi-threaded decoding */
2682 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2684 /* Ensure that subtitle_header is properly set. */
2685 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2686 && codec && !st->codec->codec)
2687 avcodec_open2(st->codec, codec, options ? &options[i]
2690 //try to just open decoders, in case this is enough to get parameters
2691 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2692 if (codec && !st->codec->codec)
2693 avcodec_open2(st->codec, codec, options ? &options[i]
2697 av_dict_free(&thread_opt);
2700 for (i=0; i<ic->nb_streams; i++) {
2701 #if FF_API_R_FRAME_RATE
2702 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2704 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2705 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2711 if (ff_check_interrupt(&ic->interrupt_callback)){
2713 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2717 /* check if one codec still needs to be handled */
2718 for(i=0;i<ic->nb_streams;i++) {
2719 int fps_analyze_framecount = 20;
2721 st = ic->streams[i];
2722 if (!has_codec_parameters(st, NULL))
2724 /* if the timebase is coarse (like the usual millisecond precision
2725 of mkv), we need to analyze more frames to reliably arrive at
2727 if (av_q2d(st->time_base) > 0.0005)
2728 fps_analyze_framecount *= 2;
2729 if (ic->fps_probe_size >= 0)
2730 fps_analyze_framecount = ic->fps_probe_size;
2731 /* variable fps and no guess at the real fps */
2732 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2733 && st->info->duration_count < fps_analyze_framecount
2734 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2736 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2738 if (st->first_dts == AV_NOPTS_VALUE &&
2739 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2740 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2743 if (i == ic->nb_streams) {
2744 /* NOTE: if the format has no header, then we need to read
2745 some packets to get most of the streams, so we cannot
2747 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2748 /* if we found the info for all the codecs, we can stop */
2750 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2755 /* we did not get all the codec info, but we read too much data */
2756 if (read_size >= ic->probesize) {
2758 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2759 for (i = 0; i < ic->nb_streams; i++)
2760 if (!ic->streams[i]->r_frame_rate.num &&
2761 ic->streams[i]->info->duration_count <= 1)
2762 av_log(ic, AV_LOG_WARNING,
2763 "Stream #%d: not enough frames to estimate rate; "
2764 "consider increasing probesize\n", i);
2768 /* NOTE: a new stream can be added there if no header in file
2769 (AVFMTCTX_NOHEADER) */
2770 ret = read_frame_internal(ic, &pkt1);
2771 if (ret == AVERROR(EAGAIN))
2779 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2782 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2783 &ic->packet_buffer_end);
2784 if ((ret = av_dup_packet(pkt)) < 0)
2785 goto find_stream_info_err;
2788 read_size += pkt->size;
2790 st = ic->streams[pkt->stream_index];
2791 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2792 /* check for non-increasing dts */
2793 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2794 st->info->fps_last_dts >= pkt->dts) {
2795 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2796 "packet %d with DTS %"PRId64", packet %d with DTS "
2797 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2798 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2799 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2801 /* check for a discontinuity in dts - if the difference in dts
2802 * is more than 1000 times the average packet duration in the sequence,
2803 * we treat it as a discontinuity */
2804 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2805 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2806 (pkt->dts - st->info->fps_last_dts) / 1000 >
2807 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2808 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2809 "packet %d with DTS %"PRId64", packet %d with DTS "
2810 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2811 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2812 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2815 /* update stored dts values */
2816 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2817 st->info->fps_first_dts = pkt->dts;
2818 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2820 st->info->fps_last_dts = pkt->dts;
2821 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2823 if (st->codec_info_nb_frames>1) {
2825 if (st->time_base.den > 0)
2826 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2827 if (st->avg_frame_rate.num > 0)
2828 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2830 if (t >= ic->max_analyze_duration) {
2831 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2834 if (pkt->duration) {
2835 st->info->codec_info_duration += pkt->duration;
2836 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2839 #if FF_API_R_FRAME_RATE
2841 int64_t last = st->info->last_dts;
2843 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2844 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2845 int64_t duration= pkt->dts - last;
2847 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2848 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2849 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2850 int framerate= get_std_framerate(i);
2851 double sdts= dts*framerate/(1001*12);
2853 int64_t ticks= llrint(sdts+j*0.5);
2854 double error= sdts - ticks + j*0.5;
2855 st->info->duration_error[j][0][i] += error;
2856 st->info->duration_error[j][1][i] += error*error;
2859 st->info->duration_count++;
2860 // ignore the first 4 values, they might have some random jitter
2861 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2862 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2864 if (pkt->dts != AV_NOPTS_VALUE)
2865 st->info->last_dts = pkt->dts;
2868 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2869 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2870 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2871 st->codec->extradata_size= i;
2872 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2873 if (!st->codec->extradata)
2874 return AVERROR(ENOMEM);
2875 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2876 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2880 /* if still no information, we try to open the codec and to
2881 decompress the frame. We try to avoid that in most cases as
2882 it takes longer and uses more memory. For MPEG-4, we need to
2883 decompress for QuickTime.
2885 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2886 least one frame of codec data, this makes sure the codec initializes
2887 the channel configuration and does not only trust the values from the container.
2889 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2891 st->codec_info_nb_frames++;
2896 AVPacket empty_pkt = { 0 };
2898 av_init_packet(&empty_pkt);
2900 ret = -1; /* we could not have all the codec parameters before EOF */
2901 for(i=0;i<ic->nb_streams;i++) {
2904 st = ic->streams[i];
2906 /* flush the decoders */
2907 if (st->info->found_decoder == 1) {
2909 err = try_decode_frame(st, &empty_pkt,
2910 (options && i < orig_nb_streams) ?
2911 &options[i] : NULL);
2912 } while (err > 0 && !has_codec_parameters(st, NULL));
2915 av_log(ic, AV_LOG_INFO,
2916 "decoding for stream %d failed\n", st->index);
2920 if (!has_codec_parameters(st, &errmsg)) {
2922 avcodec_string(buf, sizeof(buf), st->codec, 0);
2923 av_log(ic, AV_LOG_WARNING,
2924 "Could not find codec parameters for stream %d (%s): %s\n"
2925 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2933 // close codecs which were opened in try_decode_frame()
2934 for(i=0;i<ic->nb_streams;i++) {
2935 st = ic->streams[i];
2936 avcodec_close(st->codec);
2938 for(i=0;i<ic->nb_streams;i++) {
2939 st = ic->streams[i];
2940 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2941 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2942 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2943 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2944 st->codec->codec_tag= tag;
2947 /* estimate average framerate if not set by demuxer */
2948 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2950 double best_error = 0.01;
2952 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2953 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2954 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2956 /* round guessed framerate to a "standard" framerate if it's
2957 * within 1% of the original estimate*/
2958 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2959 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2960 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2962 if (error < best_error) {
2964 best_fps = std_fps.num;
2968 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2969 best_fps, 12*1001, INT_MAX);
2972 // the check for tb_unreliable() is not completely correct, since this is not about handling
2973 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2974 // ipmovie.c produces.
2975 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)
2976 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);
2977 if (st->info->duration_count>1 && !st->r_frame_rate.num
2978 && tb_unreliable(st->codec)) {
2980 double best_error= 0.01;
2982 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2985 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2987 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2990 int n= st->info->duration_count;
2991 double a= st->info->duration_error[k][0][j] / n;
2992 double error= st->info->duration_error[k][1][j]/n - a*a;
2994 if(error < best_error && best_error> 0.000000001){
2996 num = get_std_framerate(j);
2999 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3002 // do not increase frame rate by more than 1 % in order to match a standard rate.
3003 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
3004 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3007 if (!st->r_frame_rate.num){
3008 if( st->codec->time_base.den * (int64_t)st->time_base.num
3009 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
3010 st->r_frame_rate.num = st->codec->time_base.den;
3011 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3013 st->r_frame_rate.num = st->time_base.den;
3014 st->r_frame_rate.den = st->time_base.num;
3017 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3018 if(!st->codec->bits_per_coded_sample)
3019 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
3020 // set stream disposition based on audio service type
3021 switch (st->codec->audio_service_type) {
3022 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3023 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
3024 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3025 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
3026 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3027 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
3028 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3029 st->disposition = AV_DISPOSITION_COMMENT; break;
3030 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3031 st->disposition = AV_DISPOSITION_KARAOKE; break;
3037 estimate_timings(ic, old_offset);
3039 compute_chapters_end(ic);
3041 find_stream_info_err:
3042 for (i=0; i < ic->nb_streams; i++) {
3043 if (ic->streams[i]->codec)
3044 ic->streams[i]->codec->thread_count = 0;
3045 av_freep(&ic->streams[i]->info);
3048 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
3052 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3056 for (i = 0; i < ic->nb_programs; i++) {
3057 if (ic->programs[i] == last) {
3061 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3062 if (ic->programs[i]->stream_index[j] == s)
3063 return ic->programs[i];
3069 int av_find_best_stream(AVFormatContext *ic,
3070 enum AVMediaType type,
3071 int wanted_stream_nb,
3073 AVCodec **decoder_ret,
3076 int i, nb_streams = ic->nb_streams;
3077 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3078 unsigned *program = NULL;
3079 AVCodec *decoder = NULL, *best_decoder = NULL;
3081 if (related_stream >= 0 && wanted_stream_nb < 0) {
3082 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3084 program = p->stream_index;
3085 nb_streams = p->nb_stream_indexes;
3088 for (i = 0; i < nb_streams; i++) {
3089 int real_stream_index = program ? program[i] : i;
3090 AVStream *st = ic->streams[real_stream_index];
3091 AVCodecContext *avctx = st->codec;
3092 if (avctx->codec_type != type)
3094 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3096 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3099 decoder = avcodec_find_decoder(st->codec->codec_id);
3102 ret = AVERROR_DECODER_NOT_FOUND;
3106 count = st->codec_info_nb_frames;
3107 bitrate = avctx->bit_rate;
3108 multiframe = FFMIN(5, count);
3109 if ((best_multiframe > multiframe) ||
3110 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3111 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3114 best_bitrate = bitrate;
3115 best_multiframe = multiframe;
3116 ret = real_stream_index;
3117 best_decoder = decoder;
3118 if (program && i == nb_streams - 1 && ret < 0) {
3120 nb_streams = ic->nb_streams;
3121 i = 0; /* no related stream found, try again with everything */
3125 *decoder_ret = best_decoder;
3129 /*******************************************************/
3131 int av_read_play(AVFormatContext *s)
3133 if (s->iformat->read_play)
3134 return s->iformat->read_play(s);
3136 return avio_pause(s->pb, 0);
3137 return AVERROR(ENOSYS);
3140 int av_read_pause(AVFormatContext *s)
3142 if (s->iformat->read_pause)
3143 return s->iformat->read_pause(s);
3145 return avio_pause(s->pb, 1);
3146 return AVERROR(ENOSYS);
3149 void ff_free_stream(AVFormatContext *s, AVStream *st){
3150 av_assert0(s->nb_streams>0);
3151 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3154 av_parser_close(st->parser);
3156 if (st->attached_pic.data)
3157 av_free_packet(&st->attached_pic);
3158 av_dict_free(&st->metadata);
3159 av_freep(&st->index_entries);
3160 av_freep(&st->codec->extradata);
3161 av_freep(&st->codec->subtitle_header);
3162 av_freep(&st->codec);
3163 av_freep(&st->priv_data);
3164 av_freep(&st->info);
3165 av_freep(&st->probe_data.buf);
3166 av_freep(&s->streams[ --s->nb_streams ]);
3169 void avformat_free_context(AVFormatContext *s)
3177 if (s->iformat && s->iformat->priv_class && s->priv_data)
3178 av_opt_free(s->priv_data);
3180 for(i=s->nb_streams-1; i>=0; i--) {
3181 ff_free_stream(s, s->streams[i]);
3183 for(i=s->nb_programs-1; i>=0; i--) {
3184 av_dict_free(&s->programs[i]->metadata);
3185 av_freep(&s->programs[i]->stream_index);
3186 av_freep(&s->programs[i]);
3188 av_freep(&s->programs);
3189 av_freep(&s->priv_data);
3190 while(s->nb_chapters--) {
3191 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3192 av_freep(&s->chapters[s->nb_chapters]);
3194 av_freep(&s->chapters);
3195 av_dict_free(&s->metadata);
3196 av_freep(&s->streams);
3200 #if FF_API_CLOSE_INPUT_FILE
3201 void av_close_input_file(AVFormatContext *s)
3203 avformat_close_input(&s);
3207 void avformat_close_input(AVFormatContext **ps)
3209 AVFormatContext *s = *ps;
3210 AVIOContext *pb = s->pb;
3212 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3213 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3216 flush_packet_queue(s);
3219 if (s->iformat->read_close)
3220 s->iformat->read_close(s);
3223 avformat_free_context(s);
3230 #if FF_API_NEW_STREAM
3231 AVStream *av_new_stream(AVFormatContext *s, int id)
3233 AVStream *st = avformat_new_stream(s, NULL);
3240 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3246 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3248 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3251 s->streams = streams;
3253 st = av_mallocz(sizeof(AVStream));
3256 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3260 st->info->last_dts = AV_NOPTS_VALUE;
3262 st->codec = avcodec_alloc_context3(c);
3264 /* no default bitrate if decoding */
3265 st->codec->bit_rate = 0;
3267 st->index = s->nb_streams;
3268 st->start_time = AV_NOPTS_VALUE;
3269 st->duration = AV_NOPTS_VALUE;
3270 /* we set the current DTS to 0 so that formats without any timestamps
3271 but durations get some timestamps, formats with some unknown
3272 timestamps have their first few packets buffered and the
3273 timestamps corrected before they are returned to the user */
3274 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3275 st->first_dts = AV_NOPTS_VALUE;
3276 st->probe_packets = MAX_PROBE_PACKETS;
3277 st->pts_wrap_reference = AV_NOPTS_VALUE;
3278 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3280 /* default pts setting is MPEG-like */
3281 avpriv_set_pts_info(st, 33, 1, 90000);
3282 st->last_IP_pts = AV_NOPTS_VALUE;
3283 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3284 st->pts_buffer[i]= AV_NOPTS_VALUE;
3285 st->reference_dts = AV_NOPTS_VALUE;
3287 st->sample_aspect_ratio = (AVRational){0,1};
3289 #if FF_API_R_FRAME_RATE
3290 st->info->last_dts = AV_NOPTS_VALUE;
3292 st->info->fps_first_dts = AV_NOPTS_VALUE;
3293 st->info->fps_last_dts = AV_NOPTS_VALUE;
3295 s->streams[s->nb_streams++] = st;
3299 AVProgram *av_new_program(AVFormatContext *ac, int id)
3301 AVProgram *program=NULL;
3304 av_dlog(ac, "new_program: id=0x%04x\n", id);
3306 for(i=0; i<ac->nb_programs; i++)
3307 if(ac->programs[i]->id == id)
3308 program = ac->programs[i];
3311 program = av_mallocz(sizeof(AVProgram));
3314 dynarray_add(&ac->programs, &ac->nb_programs, program);
3315 program->discard = AVDISCARD_NONE;
3318 program->pts_wrap_reference = AV_NOPTS_VALUE;
3319 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3321 program->start_time =
3322 program->end_time = AV_NOPTS_VALUE;
3327 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3329 AVChapter *chapter = NULL;
3332 for(i=0; i<s->nb_chapters; i++)
3333 if(s->chapters[i]->id == id)
3334 chapter = s->chapters[i];
3337 chapter= av_mallocz(sizeof(AVChapter));
3340 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3342 av_dict_set(&chapter->metadata, "title", title, 0);
3344 chapter->time_base= time_base;
3345 chapter->start = start;
3351 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3354 AVProgram *program=NULL;
3357 if (idx >= ac->nb_streams) {
3358 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3362 for(i=0; i<ac->nb_programs; i++){
3363 if(ac->programs[i]->id != progid)
3365 program = ac->programs[i];
3366 for(j=0; j<program->nb_stream_indexes; j++)
3367 if(program->stream_index[j] == idx)
3370 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3373 program->stream_index = tmp;
3374 program->stream_index[program->nb_stream_indexes++] = idx;
3379 static void print_fps(double d, const char *postfix){
3380 uint64_t v= lrintf(d*100);
3381 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3382 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3383 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3386 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3388 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3389 AVDictionaryEntry *tag=NULL;
3391 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3392 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3393 if(strcmp("language", tag->key)){
3394 const char *p = tag->value;
3395 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3398 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3399 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3400 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3402 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3403 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3406 av_log(ctx, AV_LOG_INFO, "\n");
3412 /* "user interface" functions */
3413 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3416 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3417 AVStream *st = ic->streams[i];
3418 int g = av_gcd(st->time_base.num, st->time_base.den);
3419 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3420 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3421 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3422 /* the pid is an important information, so we display it */
3423 /* XXX: add a generic system */
3424 if (flags & AVFMT_SHOW_IDS)
3425 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3427 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3428 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3429 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3430 if (st->sample_aspect_ratio.num && // default
3431 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3432 AVRational display_aspect_ratio;
3433 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3434 st->codec->width*st->sample_aspect_ratio.num,
3435 st->codec->height*st->sample_aspect_ratio.den,
3437 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3438 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3439 display_aspect_ratio.num, display_aspect_ratio.den);
3441 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3442 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3443 print_fps(av_q2d(st->avg_frame_rate), "fps");
3444 #if FF_API_R_FRAME_RATE
3445 if(st->r_frame_rate.den && st->r_frame_rate.num)
3446 print_fps(av_q2d(st->r_frame_rate), "tbr");
3448 if(st->time_base.den && st->time_base.num)
3449 print_fps(1/av_q2d(st->time_base), "tbn");
3450 if(st->codec->time_base.den && st->codec->time_base.num)
3451 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3453 if (st->disposition & AV_DISPOSITION_DEFAULT)
3454 av_log(NULL, AV_LOG_INFO, " (default)");
3455 if (st->disposition & AV_DISPOSITION_DUB)
3456 av_log(NULL, AV_LOG_INFO, " (dub)");
3457 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3458 av_log(NULL, AV_LOG_INFO, " (original)");
3459 if (st->disposition & AV_DISPOSITION_COMMENT)
3460 av_log(NULL, AV_LOG_INFO, " (comment)");
3461 if (st->disposition & AV_DISPOSITION_LYRICS)
3462 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3463 if (st->disposition & AV_DISPOSITION_KARAOKE)
3464 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3465 if (st->disposition & AV_DISPOSITION_FORCED)
3466 av_log(NULL, AV_LOG_INFO, " (forced)");
3467 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3468 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3469 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3470 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3471 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3472 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3473 av_log(NULL, AV_LOG_INFO, "\n");
3474 dump_metadata(NULL, st->metadata, " ");
3477 void av_dump_format(AVFormatContext *ic,
3483 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3484 if (ic->nb_streams && !printed)
3487 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3488 is_output ? "Output" : "Input",
3490 is_output ? ic->oformat->name : ic->iformat->name,
3491 is_output ? "to" : "from", url);
3492 dump_metadata(NULL, ic->metadata, " ");
3494 av_log(NULL, AV_LOG_INFO, " Duration: ");
3495 if (ic->duration != AV_NOPTS_VALUE) {
3496 int hours, mins, secs, us;
3497 int64_t duration = ic->duration + 5000;
3498 secs = duration / AV_TIME_BASE;
3499 us = duration % AV_TIME_BASE;
3504 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3505 (100 * us) / AV_TIME_BASE);
3507 av_log(NULL, AV_LOG_INFO, "N/A");
3509 if (ic->start_time != AV_NOPTS_VALUE) {
3511 av_log(NULL, AV_LOG_INFO, ", start: ");
3512 secs = ic->start_time / AV_TIME_BASE;
3513 us = abs(ic->start_time % AV_TIME_BASE);
3514 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3515 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3517 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3519 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3521 av_log(NULL, AV_LOG_INFO, "N/A");
3523 av_log(NULL, AV_LOG_INFO, "\n");
3525 for (i = 0; i < ic->nb_chapters; i++) {
3526 AVChapter *ch = ic->chapters[i];
3527 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3528 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3529 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3531 dump_metadata(NULL, ch->metadata, " ");
3533 if(ic->nb_programs) {
3534 int j, k, total = 0;
3535 for(j=0; j<ic->nb_programs; j++) {
3536 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3538 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3539 name ? name->value : "");
3540 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3541 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3542 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3543 printed[ic->programs[j]->stream_index[k]] = 1;
3545 total += ic->programs[j]->nb_stream_indexes;
3547 if (total < ic->nb_streams)
3548 av_log(NULL, AV_LOG_INFO, " No Program\n");
3550 for(i=0;i<ic->nb_streams;i++)
3552 dump_stream_format(ic, i, index, is_output);
3557 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3558 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3560 return av_gettime();
3564 uint64_t ff_ntp_time(void)
3566 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3569 int av_get_frame_filename(char *buf, int buf_size,
3570 const char *path, int number)
3573 char *q, buf1[20], c;
3574 int nd, len, percentd_found;
3586 while (isdigit(*p)) {
3587 nd = nd * 10 + *p++ - '0';
3590 } while (isdigit(c));
3599 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3601 if ((q - buf + len) > buf_size - 1)
3603 memcpy(q, buf1, len);
3611 if ((q - buf) < buf_size - 1)
3615 if (!percentd_found)
3624 static void hex_dump_internal(void *avcl, FILE *f, int level,
3625 const uint8_t *buf, int size)
3628 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3630 for(i=0;i<size;i+=16) {
3637 PRINT(" %02x", buf[i+j]);
3642 for(j=0;j<len;j++) {
3644 if (c < ' ' || c > '~')
3653 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3655 hex_dump_internal(NULL, f, 0, buf, size);
3658 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3660 hex_dump_internal(avcl, NULL, level, buf, size);
3663 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3665 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3666 PRINT("stream #%d:\n", pkt->stream_index);
3667 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3668 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3669 /* DTS is _always_ valid after av_read_frame() */
3671 if (pkt->dts == AV_NOPTS_VALUE)
3674 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3675 /* PTS may not be known if B-frames are present. */
3677 if (pkt->pts == AV_NOPTS_VALUE)
3680 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3682 PRINT(" size=%d\n", pkt->size);
3685 av_hex_dump(f, pkt->data, pkt->size);
3689 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3691 AVRational tb = { 1, AV_TIME_BASE };
3692 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3696 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3698 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3702 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3704 AVRational tb = { 1, AV_TIME_BASE };
3705 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3709 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3712 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3715 void av_url_split(char *proto, int proto_size,
3716 char *authorization, int authorization_size,
3717 char *hostname, int hostname_size,
3719 char *path, int path_size,
3722 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3724 if (port_ptr) *port_ptr = -1;
3725 if (proto_size > 0) proto[0] = 0;
3726 if (authorization_size > 0) authorization[0] = 0;
3727 if (hostname_size > 0) hostname[0] = 0;
3728 if (path_size > 0) path[0] = 0;
3730 /* parse protocol */
3731 if ((p = strchr(url, ':'))) {
3732 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3737 /* no protocol means plain filename */
3738 av_strlcpy(path, url, path_size);
3742 /* separate path from hostname */
3743 ls = strchr(p, '/');
3744 ls2 = strchr(p, '?');
3748 ls = FFMIN(ls, ls2);
3750 av_strlcpy(path, ls, path_size);
3752 ls = &p[strlen(p)]; // XXX
3754 /* the rest is hostname, use that to parse auth/port */
3756 /* authorization (user[:pass]@hostname) */
3758 while ((at = strchr(p, '@')) && at < ls) {
3759 av_strlcpy(authorization, at2,
3760 FFMIN(authorization_size, at + 1 - at2));
3761 p = at + 1; /* skip '@' */
3764 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3766 av_strlcpy(hostname, p + 1,
3767 FFMIN(hostname_size, brk - p));
3768 if (brk[1] == ':' && port_ptr)
3769 *port_ptr = atoi(brk + 2);
3770 } else if ((col = strchr(p, ':')) && col < ls) {
3771 av_strlcpy(hostname, p,
3772 FFMIN(col + 1 - p, hostname_size));
3773 if (port_ptr) *port_ptr = atoi(col + 1);
3775 av_strlcpy(hostname, p,
3776 FFMIN(ls + 1 - p, hostname_size));
3780 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3783 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3786 'C', 'D', 'E', 'F' };
3787 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3790 'c', 'd', 'e', 'f' };
3791 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3793 for(i = 0; i < s; i++) {
3794 buff[i * 2] = hex_table[src[i] >> 4];
3795 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3801 int ff_hex_to_data(uint8_t *data, const char *p)
3808 p += strspn(p, SPACE_CHARS);
3811 c = toupper((unsigned char) *p++);
3812 if (c >= '0' && c <= '9')
3814 else if (c >= 'A' && c <= 'F')
3829 #if FF_API_SET_PTS_INFO
3830 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3831 unsigned int pts_num, unsigned int pts_den)
3833 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3837 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3838 unsigned int pts_num, unsigned int pts_den)
3841 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3842 if(new_tb.num != pts_num)
3843 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3845 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3847 if(new_tb.num <= 0 || new_tb.den <= 0) {
3848 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);
3851 s->time_base = new_tb;
3852 av_codec_set_pkt_timebase(s->codec, new_tb);
3853 s->pts_wrap_bits = pts_wrap_bits;
3856 int ff_url_join(char *str, int size, const char *proto,
3857 const char *authorization, const char *hostname,
3858 int port, const char *fmt, ...)
3861 struct addrinfo hints = { 0 }, *ai;
3866 av_strlcatf(str, size, "%s://", proto);
3867 if (authorization && authorization[0])
3868 av_strlcatf(str, size, "%s@", authorization);
3869 #if CONFIG_NETWORK && defined(AF_INET6)
3870 /* Determine if hostname is a numerical IPv6 address,
3871 * properly escape it within [] in that case. */
3872 hints.ai_flags = AI_NUMERICHOST;
3873 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3874 if (ai->ai_family == AF_INET6) {
3875 av_strlcat(str, "[", size);
3876 av_strlcat(str, hostname, size);
3877 av_strlcat(str, "]", size);
3879 av_strlcat(str, hostname, size);
3884 /* Not an IPv6 address, just output the plain string. */
3885 av_strlcat(str, hostname, size);
3888 av_strlcatf(str, size, ":%d", port);
3891 int len = strlen(str);
3894 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3900 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3901 AVFormatContext *src)
3906 local_pkt.stream_index = dst_stream;
3907 if (pkt->pts != AV_NOPTS_VALUE)
3908 local_pkt.pts = av_rescale_q(pkt->pts,
3909 src->streams[pkt->stream_index]->time_base,
3910 dst->streams[dst_stream]->time_base);
3911 if (pkt->dts != AV_NOPTS_VALUE)
3912 local_pkt.dts = av_rescale_q(pkt->dts,
3913 src->streams[pkt->stream_index]->time_base,
3914 dst->streams[dst_stream]->time_base);
3915 return av_write_frame(dst, &local_pkt);
3918 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3921 const char *ptr = str;
3923 /* Parse key=value pairs. */
3926 char *dest = NULL, *dest_end;
3927 int key_len, dest_len = 0;
3929 /* Skip whitespace and potential commas. */
3930 while (*ptr && (isspace(*ptr) || *ptr == ','))
3937 if (!(ptr = strchr(key, '=')))
3940 key_len = ptr - key;
3942 callback_get_buf(context, key, key_len, &dest, &dest_len);
3943 dest_end = dest + dest_len - 1;
3947 while (*ptr && *ptr != '\"') {
3951 if (dest && dest < dest_end)
3955 if (dest && dest < dest_end)
3963 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3964 if (dest && dest < dest_end)
3972 int ff_find_stream_index(AVFormatContext *s, int id)
3975 for (i = 0; i < s->nb_streams; i++) {
3976 if (s->streams[i]->id == id)
3982 void ff_make_absolute_url(char *buf, int size, const char *base,
3985 char *sep, *path_query;
3986 /* Absolute path, relative to the current server */
3987 if (base && strstr(base, "://") && rel[0] == '/') {
3989 av_strlcpy(buf, base, size);
3990 sep = strstr(buf, "://");
3992 /* Take scheme from base url */
3993 if (rel[1] == '/') {
3996 /* Take scheme and host from base url */
3998 sep = strchr(sep, '/');
4003 av_strlcat(buf, rel, size);
4006 /* If rel actually is an absolute url, just copy it */
4007 if (!base || strstr(rel, "://") || rel[0] == '/') {
4008 av_strlcpy(buf, rel, size);
4012 av_strlcpy(buf, base, size);
4014 /* Strip off any query string from base */
4015 path_query = strchr(buf, '?');
4016 if (path_query != NULL)
4019 /* Is relative path just a new query part? */
4020 if (rel[0] == '?') {
4021 av_strlcat(buf, rel, size);
4025 /* Remove the file name from the base url */
4026 sep = strrchr(buf, '/');
4031 while (av_strstart(rel, "../", NULL) && sep) {
4032 /* Remove the path delimiter at the end */
4034 sep = strrchr(buf, '/');
4035 /* If the next directory name to pop off is "..", break here */
4036 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4037 /* Readd the slash we just removed */
4038 av_strlcat(buf, "/", size);
4041 /* Cut off the directory name */
4048 av_strlcat(buf, rel, size);
4051 int64_t ff_iso8601_to_unix_time(const char *datestr)
4053 struct tm time1 = {0}, time2 = {0};
4055 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4056 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4058 return av_timegm(&time2);
4060 return av_timegm(&time1);
4063 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
4066 if (ofmt->query_codec)
4067 return ofmt->query_codec(codec_id, std_compliance);
4068 else if (ofmt->codec_tag)
4069 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4070 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4071 codec_id == ofmt->subtitle_codec)
4074 return AVERROR_PATCHWELCOME;
4077 int avformat_network_init(void)
4081 ff_network_inited_globally = 1;
4082 if ((ret = ff_network_init()) < 0)
4089 int avformat_network_deinit(void)
4098 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4099 uint64_t channel_layout, int32_t sample_rate,
4100 int32_t width, int32_t height)
4106 return AVERROR(EINVAL);
4109 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4111 if (channel_layout) {
4113 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4117 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4119 if (width || height) {
4121 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4123 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4125 return AVERROR(ENOMEM);
4126 bytestream_put_le32(&data, flags);
4128 bytestream_put_le32(&data, channels);
4130 bytestream_put_le64(&data, channel_layout);
4132 bytestream_put_le32(&data, sample_rate);
4133 if (width || height) {
4134 bytestream_put_le32(&data, width);
4135 bytestream_put_le32(&data, height);
4140 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4142 return ff_codec_bmp_tags;
4144 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4146 return ff_codec_wav_tags;
4149 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4151 AVRational undef = {0, 1};
4152 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4153 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4154 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4156 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4157 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4158 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4159 stream_sample_aspect_ratio = undef;
4161 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4162 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4163 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4164 frame_sample_aspect_ratio = undef;
4166 if (stream_sample_aspect_ratio.num)
4167 return stream_sample_aspect_ratio;
4169 return frame_sample_aspect_ratio;
4172 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4175 if (*spec <= '9' && *spec >= '0') /* opt:index */
4176 return strtol(spec, NULL, 0) == st->index;
4177 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4178 *spec == 't') { /* opt:[vasdt] */
4179 enum AVMediaType type;
4182 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4183 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4184 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4185 case 'd': type = AVMEDIA_TYPE_DATA; break;
4186 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4187 default: av_assert0(0);
4189 if (type != st->codec->codec_type)
4191 if (*spec++ == ':') { /* possibly followed by :index */
4192 int i, index = strtol(spec, NULL, 0);
4193 for (i = 0; i < s->nb_streams; i++)
4194 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4195 return i == st->index;
4199 } else if (*spec == 'p' && *(spec + 1) == ':') {
4203 prog_id = strtol(spec, &endptr, 0);
4204 for (i = 0; i < s->nb_programs; i++) {
4205 if (s->programs[i]->id != prog_id)
4208 if (*endptr++ == ':') {
4209 int stream_idx = strtol(endptr, NULL, 0);
4210 return stream_idx >= 0 &&
4211 stream_idx < s->programs[i]->nb_stream_indexes &&
4212 st->index == s->programs[i]->stream_index[stream_idx];
4215 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4216 if (st->index == s->programs[i]->stream_index[j])
4220 } else if (*spec == '#') {
4223 sid = strtol(spec + 1, &endptr, 0);
4225 return st->id == sid;
4226 } else if (!*spec) /* empty specifier, matches everything */
4229 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4230 return AVERROR(EINVAL);