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 force_codec_ids(AVFormatContext *s, AVStream *st)
664 switch(st->codec->codec_type){
665 case AVMEDIA_TYPE_VIDEO:
666 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
668 case AVMEDIA_TYPE_AUDIO:
669 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
671 case AVMEDIA_TYPE_SUBTITLE:
672 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
677 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
679 if(st->request_probe>0){
680 AVProbeData *pd = &st->probe_data;
682 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
686 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
690 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
691 pd->buf_size += pkt->size;
692 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
695 st->probe_packets = 0;
697 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
702 end= s->raw_packet_buffer_remaining_size <= 0
703 || st->probe_packets<=0;
705 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
706 int score= set_codec_from_probe_data(s, st, pd);
707 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
711 st->request_probe= -1;
712 if(st->codec->codec_id != AV_CODEC_ID_NONE){
713 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
715 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
717 force_codec_ids(s, st);
722 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
728 AVPacketList *pktl = s->raw_packet_buffer;
732 st = s->streams[pkt->stream_index];
733 if(st->request_probe <= 0){
734 s->raw_packet_buffer = pktl->next;
735 s->raw_packet_buffer_remaining_size += pkt->size;
744 ret= s->iformat->read_packet(s, pkt);
746 if (!pktl || ret == AVERROR(EAGAIN))
748 for (i = 0; i < s->nb_streams; i++) {
750 if (st->probe_packets) {
751 probe_codec(s, st, NULL);
753 av_assert0(st->request_probe <= 0);
758 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
759 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
760 av_log(s, AV_LOG_WARNING,
761 "Dropped corrupted packet (stream = %d)\n",
767 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
768 av_packet_merge_side_data(pkt);
770 if(pkt->stream_index >= (unsigned)s->nb_streams){
771 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
775 st= s->streams[pkt->stream_index];
776 pkt->dts = wrap_timestamp(st, pkt->dts);
777 pkt->pts = wrap_timestamp(st, pkt->pts);
779 force_codec_ids(s, st);
781 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
782 if (s->use_wallclock_as_timestamps)
783 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
785 if(!pktl && st->request_probe <= 0)
788 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
789 s->raw_packet_buffer_remaining_size -= pkt->size;
791 probe_codec(s, st, pkt);
795 #if FF_API_READ_PACKET
796 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
798 return ff_read_packet(s, pkt);
803 /**********************************************************/
805 static int determinable_frame_size(AVCodecContext *avctx)
807 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
808 avctx->codec_id == AV_CODEC_ID_MP1 ||
809 avctx->codec_id == AV_CODEC_ID_MP2 ||
810 avctx->codec_id == AV_CODEC_ID_MP3/* ||
811 avctx->codec_id == AV_CODEC_ID_CELT*/)
817 * Get the number of samples of an audio frame. Return -1 on error.
819 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
823 /* give frame_size priority if demuxing */
824 if (!mux && enc->frame_size > 1)
825 return enc->frame_size;
827 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
830 /* fallback to using frame_size if muxing */
831 if (enc->frame_size > 1)
832 return enc->frame_size;
839 * Return the frame duration in seconds. Return 0 if not available.
841 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
842 AVCodecParserContext *pc, AVPacket *pkt)
848 switch(st->codec->codec_type) {
849 case AVMEDIA_TYPE_VIDEO:
850 if (st->r_frame_rate.num && !pc) {
851 *pnum = st->r_frame_rate.den;
852 *pden = st->r_frame_rate.num;
853 } else if(st->time_base.num*1000LL > st->time_base.den) {
854 *pnum = st->time_base.num;
855 *pden = st->time_base.den;
856 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
857 *pnum = st->codec->time_base.num;
858 *pden = st->codec->time_base.den;
859 if (pc && pc->repeat_pict) {
860 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
861 *pden /= 1 + pc->repeat_pict;
863 *pnum *= 1 + pc->repeat_pict;
865 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
866 //Thus if we have no parser in such case leave duration undefined.
867 if(st->codec->ticks_per_frame>1 && !pc){
872 case AVMEDIA_TYPE_AUDIO:
873 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
874 if (frame_size <= 0 || st->codec->sample_rate <= 0)
877 *pden = st->codec->sample_rate;
884 static int is_intra_only(AVCodecContext *enc){
885 const AVCodecDescriptor *desc;
887 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
890 desc = av_codec_get_codec_descriptor(enc);
892 desc = avcodec_descriptor_get(enc->codec_id);
893 av_codec_set_codec_descriptor(enc, desc);
896 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
900 static int has_decode_delay_been_guessed(AVStream *st)
902 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
903 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
905 #if CONFIG_H264_DECODER
906 if(st->codec->has_b_frames &&
907 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
910 if(st->codec->has_b_frames<3)
911 return st->nb_decoded_frames >= 7;
912 else if(st->codec->has_b_frames<4)
913 return st->nb_decoded_frames >= 18;
915 return st->nb_decoded_frames >= 20;
918 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
922 if (pktl == s->parse_queue_end)
923 return s->packet_buffer;
927 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index)
929 if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
930 st->pts_wrap_reference == AV_NOPTS_VALUE && st->first_dts != AV_NOPTS_VALUE) {
933 // reference time stamp should be 60 s before first time stamp
934 int64_t pts_wrap_reference = st->first_dts - av_rescale(60, st->time_base.den, st->time_base.num);
935 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
936 int pts_wrap_behavior = (st->first_dts < (1LL<<st->pts_wrap_bits) - (1LL<<st->pts_wrap_bits-3)) ||
937 (st->first_dts < (1LL<<st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
938 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
940 AVProgram *first_program = av_find_program_from_stream(s, NULL, stream_index);
942 if (!first_program) {
943 int default_stream_index = av_find_default_stream_index(s);
944 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
945 for (i=0; i<s->nb_streams; i++) {
946 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
947 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
951 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
952 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
956 AVProgram *program = first_program;
958 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
959 pts_wrap_reference = program->pts_wrap_reference;
960 pts_wrap_behavior = program->pts_wrap_behavior;
963 program = av_find_program_from_stream(s, program, stream_index);
966 // update every program with differing pts_wrap_reference
967 program = first_program;
969 if (program->pts_wrap_reference != pts_wrap_reference) {
970 for (i=0; i<program->nb_stream_indexes; i++) {
971 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
972 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
975 program->pts_wrap_reference = pts_wrap_reference;
976 program->pts_wrap_behavior = pts_wrap_behavior;
978 program = av_find_program_from_stream(s, program, stream_index);
986 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
987 int64_t dts, int64_t pts, AVPacket *pkt)
989 AVStream *st= s->streams[stream_index];
990 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
991 int64_t pts_buffer[MAX_REORDER_DELAY+1];
995 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
998 delay = st->codec->has_b_frames;
999 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
1001 shift = st->first_dts - RELATIVE_TS_BASE;
1003 for (i=0; i<MAX_REORDER_DELAY+1; i++)
1004 pts_buffer[i] = AV_NOPTS_VALUE;
1006 if (is_relative(pts))
1009 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1010 if(pktl->pkt.stream_index != stream_index)
1012 if(is_relative(pktl->pkt.pts))
1013 pktl->pkt.pts += shift;
1015 if(is_relative(pktl->pkt.dts))
1016 pktl->pkt.dts += shift;
1018 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
1019 st->start_time= pktl->pkt.pts;
1021 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1022 pts_buffer[0]= pktl->pkt.pts;
1023 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
1024 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
1025 if(pktl->pkt.dts == AV_NOPTS_VALUE)
1026 pktl->pkt.dts= pts_buffer[0];
1030 if (update_wrap_reference(s, st, stream_index) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
1031 // correct first time stamps to negative values
1032 st->first_dts = wrap_timestamp(st, st->first_dts);
1033 st->cur_dts = wrap_timestamp(st, st->cur_dts);
1034 pkt->dts = wrap_timestamp(st, pkt->dts);
1035 pkt->pts = wrap_timestamp(st, pkt->pts);
1036 pts = wrap_timestamp(st, pts);
1039 if (st->start_time == AV_NOPTS_VALUE)
1040 st->start_time = pts;
1043 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1044 int stream_index, int duration)
1046 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1047 int64_t cur_dts= RELATIVE_TS_BASE;
1049 if(st->first_dts != AV_NOPTS_VALUE){
1050 cur_dts= st->first_dts;
1051 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1052 if(pktl->pkt.stream_index == stream_index){
1053 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
1055 cur_dts -= duration;
1058 if(pktl && pktl->pkt.dts != st->first_dts) {
1059 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));
1063 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
1066 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1067 st->first_dts = cur_dts;
1068 }else if(st->cur_dts != RELATIVE_TS_BASE)
1071 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1072 if(pktl->pkt.stream_index != stream_index)
1074 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
1075 && !pktl->pkt.duration){
1076 pktl->pkt.dts= cur_dts;
1077 if(!st->codec->has_b_frames)
1078 pktl->pkt.pts= cur_dts;
1079 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1080 pktl->pkt.duration = duration;
1083 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1086 st->cur_dts= cur_dts;
1089 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1090 AVCodecParserContext *pc, AVPacket *pkt)
1092 int num, den, presentation_delayed, delay, i;
1095 if (s->flags & AVFMT_FLAG_NOFILLIN)
1098 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1099 pkt->dts= AV_NOPTS_VALUE;
1101 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1102 //FIXME Set low_delay = 0 when has_b_frames = 1
1103 st->codec->has_b_frames = 1;
1105 /* do we have a video B-frame ? */
1106 delay= st->codec->has_b_frames;
1107 presentation_delayed = 0;
1109 /* XXX: need has_b_frame, but cannot get it if the codec is
1112 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1113 presentation_delayed = 1;
1115 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){
1116 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1117 pkt->dts -= 1LL<<st->pts_wrap_bits;
1119 pkt->pts += 1LL<<st->pts_wrap_bits;
1122 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1123 // we take the conservative approach and discard both
1124 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1125 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1126 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1127 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1128 pkt->dts= AV_NOPTS_VALUE;
1131 if (pkt->duration == 0) {
1132 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1134 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1137 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1138 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1140 /* correct timestamps with byte offset if demuxers only have timestamps
1141 on packet boundaries */
1142 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1143 /* this will estimate bitrate based on this frame's duration and size */
1144 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1145 if(pkt->pts != AV_NOPTS_VALUE)
1147 if(pkt->dts != AV_NOPTS_VALUE)
1151 if (pc && pc->dts_sync_point >= 0) {
1152 // we have synchronization info from the parser
1153 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1155 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1156 if (pkt->dts != AV_NOPTS_VALUE) {
1157 // got DTS from the stream, update reference timestamp
1158 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1159 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1160 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1161 // compute DTS based on reference timestamp
1162 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1163 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1165 if (pc->dts_sync_point > 0)
1166 st->reference_dts = pkt->dts; // new reference
1170 /* This may be redundant, but it should not hurt. */
1171 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1172 presentation_delayed = 1;
1174 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1175 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1176 /* interpolate PTS and DTS if they are not present */
1177 //We skip H264 currently because delay and has_b_frames are not reliably set
1178 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1179 if (presentation_delayed) {
1180 /* DTS = decompression timestamp */
1181 /* PTS = presentation timestamp */
1182 if (pkt->dts == AV_NOPTS_VALUE)
1183 pkt->dts = st->last_IP_pts;
1184 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1185 if (pkt->dts == AV_NOPTS_VALUE)
1186 pkt->dts = st->cur_dts;
1188 /* this is tricky: the dts must be incremented by the duration
1189 of the frame we are displaying, i.e. the last I- or P-frame */
1190 if (st->last_IP_duration == 0)
1191 st->last_IP_duration = pkt->duration;
1192 if(pkt->dts != AV_NOPTS_VALUE)
1193 st->cur_dts = pkt->dts + st->last_IP_duration;
1194 st->last_IP_duration = pkt->duration;
1195 st->last_IP_pts= pkt->pts;
1196 /* cannot compute PTS if not present (we can compute it only
1197 by knowing the future */
1198 } else if (pkt->pts != AV_NOPTS_VALUE ||
1199 pkt->dts != AV_NOPTS_VALUE ||
1201 int duration = pkt->duration;
1203 /* presentation is not delayed : PTS and DTS are the same */
1204 if (pkt->pts == AV_NOPTS_VALUE)
1205 pkt->pts = pkt->dts;
1206 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1208 if (pkt->pts == AV_NOPTS_VALUE)
1209 pkt->pts = st->cur_dts;
1210 pkt->dts = pkt->pts;
1211 if (pkt->pts != AV_NOPTS_VALUE)
1212 st->cur_dts = pkt->pts + duration;
1216 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1217 st->pts_buffer[0]= pkt->pts;
1218 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1219 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1220 if(pkt->dts == AV_NOPTS_VALUE)
1221 pkt->dts= st->pts_buffer[0];
1223 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1224 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); // this should happen on the first packet
1226 if(pkt->dts > st->cur_dts)
1227 st->cur_dts = pkt->dts;
1229 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1230 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1233 if (is_intra_only(st->codec))
1234 pkt->flags |= AV_PKT_FLAG_KEY;
1236 pkt->convergence_duration = pc->convergence_duration;
1239 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1242 AVPacketList *pktl = *pkt_buf;
1243 *pkt_buf = pktl->next;
1244 av_free_packet(&pktl->pkt);
1247 *pkt_buf_end = NULL;
1251 * Parse a packet, add all split parts to parse_queue
1253 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1255 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1257 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1258 AVStream *st = s->streams[stream_index];
1259 uint8_t *data = pkt ? pkt->data : NULL;
1260 int size = pkt ? pkt->size : 0;
1261 int ret = 0, got_output = 0;
1264 av_init_packet(&flush_pkt);
1267 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1268 // preserve 0-size sync packets
1269 compute_pkt_fields(s, st, st->parser, pkt);
1272 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1275 av_init_packet(&out_pkt);
1276 len = av_parser_parse2(st->parser, st->codec,
1277 &out_pkt.data, &out_pkt.size, data, size,
1278 pkt->pts, pkt->dts, pkt->pos);
1280 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1282 /* increment read pointer */
1286 got_output = !!out_pkt.size;
1291 /* set the duration */
1292 out_pkt.duration = 0;
1293 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1294 if (st->codec->sample_rate > 0) {
1295 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1296 (AVRational){ 1, st->codec->sample_rate },
1300 } else if (st->codec->time_base.num != 0 &&
1301 st->codec->time_base.den != 0) {
1302 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1303 st->codec->time_base,
1308 out_pkt.stream_index = st->index;
1309 out_pkt.pts = st->parser->pts;
1310 out_pkt.dts = st->parser->dts;
1311 out_pkt.pos = st->parser->pos;
1313 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1314 out_pkt.pos = st->parser->frame_offset;
1316 if (st->parser->key_frame == 1 ||
1317 (st->parser->key_frame == -1 &&
1318 st->parser->pict_type == AV_PICTURE_TYPE_I))
1319 out_pkt.flags |= AV_PKT_FLAG_KEY;
1321 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1322 out_pkt.flags |= AV_PKT_FLAG_KEY;
1324 compute_pkt_fields(s, st, st->parser, &out_pkt);
1326 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1327 out_pkt.destruct = pkt->destruct;
1328 pkt->destruct = NULL;
1330 if ((ret = av_dup_packet(&out_pkt)) < 0)
1333 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1334 av_free_packet(&out_pkt);
1335 ret = AVERROR(ENOMEM);
1341 /* end of the stream => close and free the parser */
1342 if (pkt == &flush_pkt) {
1343 av_parser_close(st->parser);
1348 av_free_packet(pkt);
1352 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1353 AVPacketList **pkt_buffer_end,
1357 av_assert0(*pkt_buffer);
1360 *pkt_buffer = pktl->next;
1362 *pkt_buffer_end = NULL;
1367 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1369 int ret = 0, i, got_packet = 0;
1371 av_init_packet(pkt);
1373 while (!got_packet && !s->parse_queue) {
1377 /* read next packet */
1378 ret = ff_read_packet(s, &cur_pkt);
1380 if (ret == AVERROR(EAGAIN))
1382 /* flush the parsers */
1383 for(i = 0; i < s->nb_streams; i++) {
1385 if (st->parser && st->need_parsing)
1386 parse_packet(s, NULL, st->index);
1388 /* all remaining packets are now in parse_queue =>
1389 * really terminate parsing */
1393 st = s->streams[cur_pkt.stream_index];
1395 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1396 cur_pkt.dts != AV_NOPTS_VALUE &&
1397 cur_pkt.pts < cur_pkt.dts) {
1398 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1399 cur_pkt.stream_index,
1400 av_ts2str(cur_pkt.pts),
1401 av_ts2str(cur_pkt.dts),
1404 if (s->debug & FF_FDEBUG_TS)
1405 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1406 cur_pkt.stream_index,
1407 av_ts2str(cur_pkt.pts),
1408 av_ts2str(cur_pkt.dts),
1413 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1414 st->parser = av_parser_init(st->codec->codec_id);
1416 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1417 "%s, packets or times may be invalid.\n",
1418 avcodec_get_name(st->codec->codec_id));
1419 /* no parser available: just output the raw packets */
1420 st->need_parsing = AVSTREAM_PARSE_NONE;
1421 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1422 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1423 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1424 st->parser->flags |= PARSER_FLAG_ONCE;
1425 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1426 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1430 if (!st->need_parsing || !st->parser) {
1431 /* no parsing needed: we just output the packet as is */
1433 compute_pkt_fields(s, st, NULL, pkt);
1434 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1435 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1436 ff_reduce_index(s, st->index);
1437 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1440 } else if (st->discard < AVDISCARD_ALL) {
1441 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1445 av_free_packet(&cur_pkt);
1447 if (pkt->flags & AV_PKT_FLAG_KEY)
1448 st->skip_to_keyframe = 0;
1449 if (st->skip_to_keyframe) {
1450 av_free_packet(&cur_pkt);
1455 if (!got_packet && s->parse_queue)
1456 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1458 if(s->debug & FF_FDEBUG_TS)
1459 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1461 av_ts2str(pkt->pts),
1462 av_ts2str(pkt->dts),
1470 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1472 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1478 ret = s->packet_buffer ?
1479 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1480 read_frame_internal(s, pkt);
1487 AVPacketList *pktl = s->packet_buffer;
1490 AVPacket *next_pkt = &pktl->pkt;
1492 if (next_pkt->dts != AV_NOPTS_VALUE) {
1493 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1494 // last dts seen for this stream. if any of packets following
1495 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1496 int64_t last_dts = next_pkt->dts;
1497 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1498 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1499 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1500 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1501 next_pkt->pts = pktl->pkt.dts;
1503 if (last_dts != AV_NOPTS_VALUE) {
1504 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1505 last_dts = pktl->pkt.dts;
1510 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1511 // Fixing the last reference frame had none pts issue (For MXF etc).
1512 // We only do this when
1514 // 2. we are not able to resolve a pts value for current packet.
1515 // 3. the packets for this stream at the end of the files had valid dts.
1516 next_pkt->pts = last_dts + next_pkt->duration;
1518 pktl = s->packet_buffer;
1521 /* read packet from packet buffer, if there is data */
1522 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1523 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1524 ret = read_from_packet_buffer(&s->packet_buffer,
1525 &s->packet_buffer_end, pkt);
1530 ret = read_frame_internal(s, pkt);
1532 if (pktl && ret != AVERROR(EAGAIN)) {
1539 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1540 &s->packet_buffer_end)) < 0)
1541 return AVERROR(ENOMEM);
1546 st = s->streams[pkt->stream_index];
1547 if (st->skip_samples) {
1548 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1549 AV_WL32(p, st->skip_samples);
1550 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1551 st->skip_samples = 0;
1554 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1555 ff_reduce_index(s, st->index);
1556 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1559 if (is_relative(pkt->dts))
1560 pkt->dts -= RELATIVE_TS_BASE;
1561 if (is_relative(pkt->pts))
1562 pkt->pts -= RELATIVE_TS_BASE;
1567 /* XXX: suppress the packet queue */
1568 static void flush_packet_queue(AVFormatContext *s)
1570 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1571 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1572 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1574 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1577 /*******************************************************/
1580 int av_find_default_stream_index(AVFormatContext *s)
1582 int first_audio_index = -1;
1586 if (s->nb_streams <= 0)
1588 for(i = 0; i < s->nb_streams; i++) {
1590 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1591 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1594 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1595 first_audio_index = i;
1597 return first_audio_index >= 0 ? first_audio_index : 0;
1601 * Flush the frame reader.
1603 void ff_read_frame_flush(AVFormatContext *s)
1608 flush_packet_queue(s);
1610 /* for each stream, reset read state */
1611 for(i = 0; i < s->nb_streams; i++) {
1615 av_parser_close(st->parser);
1618 st->last_IP_pts = AV_NOPTS_VALUE;
1619 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1620 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1621 st->reference_dts = AV_NOPTS_VALUE;
1623 st->probe_packets = MAX_PROBE_PACKETS;
1625 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1626 st->pts_buffer[j]= AV_NOPTS_VALUE;
1630 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1634 for(i = 0; i < s->nb_streams; i++) {
1635 AVStream *st = s->streams[i];
1637 st->cur_dts = av_rescale(timestamp,
1638 st->time_base.den * (int64_t)ref_st->time_base.num,
1639 st->time_base.num * (int64_t)ref_st->time_base.den);
1643 void ff_reduce_index(AVFormatContext *s, int stream_index)
1645 AVStream *st= s->streams[stream_index];
1646 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1648 if((unsigned)st->nb_index_entries >= max_entries){
1650 for(i=0; 2*i<st->nb_index_entries; i++)
1651 st->index_entries[i]= st->index_entries[2*i];
1652 st->nb_index_entries= i;
1656 int ff_add_index_entry(AVIndexEntry **index_entries,
1657 int *nb_index_entries,
1658 unsigned int *index_entries_allocated_size,
1659 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1661 AVIndexEntry *entries, *ie;
1664 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1667 if(timestamp == AV_NOPTS_VALUE)
1668 return AVERROR(EINVAL);
1670 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1671 timestamp -= RELATIVE_TS_BASE;
1673 entries = av_fast_realloc(*index_entries,
1674 index_entries_allocated_size,
1675 (*nb_index_entries + 1) *
1676 sizeof(AVIndexEntry));
1680 *index_entries= entries;
1682 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1685 index= (*nb_index_entries)++;
1686 ie= &entries[index];
1687 assert(index==0 || ie[-1].timestamp < timestamp);
1689 ie= &entries[index];
1690 if(ie->timestamp != timestamp){
1691 if(ie->timestamp <= timestamp)
1693 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1694 (*nb_index_entries)++;
1695 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1696 distance= ie->min_distance;
1700 ie->timestamp = timestamp;
1701 ie->min_distance= distance;
1708 int av_add_index_entry(AVStream *st,
1709 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1711 timestamp = wrap_timestamp(st, timestamp);
1712 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1713 &st->index_entries_allocated_size, pos,
1714 timestamp, size, distance, flags);
1717 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1718 int64_t wanted_timestamp, int flags)
1726 //optimize appending index entries at the end
1727 if(b && entries[b-1].timestamp < wanted_timestamp)
1732 timestamp = entries[m].timestamp;
1733 if(timestamp >= wanted_timestamp)
1735 if(timestamp <= wanted_timestamp)
1738 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1740 if(!(flags & AVSEEK_FLAG_ANY)){
1741 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1742 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1751 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1754 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1755 wanted_timestamp, flags);
1758 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1759 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1761 return wrap_timestamp(s->streams[stream_index], read_timestamp(s, stream_index, ppos, pos_limit));
1764 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1766 AVInputFormat *avif= s->iformat;
1767 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1768 int64_t ts_min, ts_max, ts;
1773 if (stream_index < 0)
1776 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1779 ts_min= AV_NOPTS_VALUE;
1780 pos_limit= -1; //gcc falsely says it may be uninitialized
1782 st= s->streams[stream_index];
1783 if(st->index_entries){
1786 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()
1787 index= FFMAX(index, 0);
1788 e= &st->index_entries[index];
1790 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1792 ts_min= e->timestamp;
1793 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1794 pos_min, av_ts2str(ts_min));
1799 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1800 assert(index < st->nb_index_entries);
1802 e= &st->index_entries[index];
1803 assert(e->timestamp >= target_ts);
1805 ts_max= e->timestamp;
1806 pos_limit= pos_max - e->min_distance;
1807 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1808 pos_max, pos_limit, av_ts2str(ts_max));
1812 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1817 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1820 ff_read_frame_flush(s);
1821 ff_update_cur_dts(s, st, ts);
1826 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1827 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1828 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1829 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1832 int64_t start_pos, filesize;
1835 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1837 if(ts_min == AV_NOPTS_VALUE){
1838 pos_min = s->data_offset;
1839 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1840 if (ts_min == AV_NOPTS_VALUE)
1844 if(ts_min >= target_ts){
1849 if(ts_max == AV_NOPTS_VALUE){
1851 filesize = avio_size(s->pb);
1852 pos_max = filesize - 1;
1855 ts_max = ff_read_timestamp(s, stream_index, &pos_max, pos_max + step, read_timestamp);
1857 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1858 if (ts_max == AV_NOPTS_VALUE)
1862 int64_t tmp_pos= pos_max + 1;
1863 int64_t tmp_ts= ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
1864 if(tmp_ts == AV_NOPTS_VALUE)
1868 if(tmp_pos >= filesize)
1874 if(ts_max <= target_ts){
1879 if(ts_min > ts_max){
1881 }else if(ts_min == ts_max){
1886 while (pos_min < pos_limit) {
1887 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1888 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1889 assert(pos_limit <= pos_max);
1892 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1893 // interpolate position (better than dichotomy)
1894 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1895 + pos_min - approximate_keyframe_distance;
1896 }else if(no_change==1){
1897 // bisection, if interpolation failed to change min or max pos last time
1898 pos = (pos_min + pos_limit)>>1;
1900 /* linear search if bisection failed, can only happen if there
1901 are very few or no keyframes between min/max */
1906 else if(pos > pos_limit)
1910 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); //may pass pos_limit instead of -1
1915 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1916 pos_min, pos, pos_max,
1917 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1918 pos_limit, start_pos, no_change);
1919 if(ts == AV_NOPTS_VALUE){
1920 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1923 assert(ts != AV_NOPTS_VALUE);
1924 if (target_ts <= ts) {
1925 pos_limit = start_pos - 1;
1929 if (target_ts >= ts) {
1935 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1936 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1939 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1941 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1942 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1943 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1949 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1950 int64_t pos_min, pos_max;
1952 pos_min = s->data_offset;
1953 pos_max = avio_size(s->pb) - 1;
1955 if (pos < pos_min) pos= pos_min;
1956 else if(pos > pos_max) pos= pos_max;
1958 avio_seek(s->pb, pos, SEEK_SET);
1963 static int seek_frame_generic(AVFormatContext *s,
1964 int stream_index, int64_t timestamp, int flags)
1971 st = s->streams[stream_index];
1973 index = av_index_search_timestamp(st, timestamp, flags);
1975 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1978 if(index < 0 || index==st->nb_index_entries-1){
1982 if(st->nb_index_entries){
1983 assert(st->index_entries);
1984 ie= &st->index_entries[st->nb_index_entries-1];
1985 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1987 ff_update_cur_dts(s, st, ie->timestamp);
1989 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1995 read_status = av_read_frame(s, &pkt);
1996 } while (read_status == AVERROR(EAGAIN));
1997 if (read_status < 0)
1999 av_free_packet(&pkt);
2000 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
2001 if(pkt.flags & AV_PKT_FLAG_KEY)
2003 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
2004 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);
2009 index = av_index_search_timestamp(st, timestamp, flags);
2014 ff_read_frame_flush(s);
2015 if (s->iformat->read_seek){
2016 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2019 ie = &st->index_entries[index];
2020 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2022 ff_update_cur_dts(s, st, ie->timestamp);
2027 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2028 int64_t timestamp, int flags)
2033 if (flags & AVSEEK_FLAG_BYTE) {
2034 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2036 ff_read_frame_flush(s);
2037 return seek_frame_byte(s, stream_index, timestamp, flags);
2040 if(stream_index < 0){
2041 stream_index= av_find_default_stream_index(s);
2042 if(stream_index < 0)
2045 st= s->streams[stream_index];
2046 /* timestamp for default must be expressed in AV_TIME_BASE units */
2047 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
2050 /* first, we try the format specific seek */
2051 if (s->iformat->read_seek) {
2052 ff_read_frame_flush(s);
2053 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2060 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2061 ff_read_frame_flush(s);
2062 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2063 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2064 ff_read_frame_flush(s);
2065 return seek_frame_generic(s, stream_index, timestamp, flags);
2071 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2073 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
2076 avformat_queue_attached_pictures(s);
2081 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
2083 if(min_ts > ts || max_ts < ts)
2086 if (s->iformat->read_seek2) {
2088 ff_read_frame_flush(s);
2090 if (stream_index == -1 && s->nb_streams == 1) {
2091 AVRational time_base = s->streams[0]->time_base;
2092 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2093 min_ts = av_rescale_rnd(min_ts, time_base.den,
2094 time_base.num * (int64_t)AV_TIME_BASE,
2096 max_ts = av_rescale_rnd(max_ts, time_base.den,
2097 time_base.num * (int64_t)AV_TIME_BASE,
2101 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2104 avformat_queue_attached_pictures(s);
2108 if(s->iformat->read_timestamp){
2109 //try to seek via read_timestamp()
2112 //Fallback to old API if new is not implemented but old is
2113 //Note the old has somewhat different semantics
2114 if (s->iformat->read_seek || 1) {
2115 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2116 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2117 if (ret<0 && ts != min_ts && max_ts != ts) {
2118 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2120 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2125 // try some generic seek like seek_frame_generic() but with new ts semantics
2128 /*******************************************************/
2131 * Return TRUE if the stream has accurate duration in any stream.
2133 * @return TRUE if the stream has accurate duration for at least one component.
2135 static int has_duration(AVFormatContext *ic)
2140 for(i = 0;i < ic->nb_streams; i++) {
2141 st = ic->streams[i];
2142 if (st->duration != AV_NOPTS_VALUE)
2145 if (ic->duration != AV_NOPTS_VALUE)
2151 * Estimate the stream timings from the one of each components.
2153 * Also computes the global bitrate if possible.
2155 static void update_stream_timings(AVFormatContext *ic)
2157 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2158 int64_t duration, duration1, filesize;
2163 start_time = INT64_MAX;
2164 start_time_text = INT64_MAX;
2165 end_time = INT64_MIN;
2166 duration = INT64_MIN;
2167 for(i = 0;i < ic->nb_streams; i++) {
2168 st = ic->streams[i];
2169 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2170 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2171 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2172 if (start_time1 < start_time_text)
2173 start_time_text = start_time1;
2175 start_time = FFMIN(start_time, start_time1);
2176 end_time1 = AV_NOPTS_VALUE;
2177 if (st->duration != AV_NOPTS_VALUE) {
2178 end_time1 = start_time1
2179 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2180 end_time = FFMAX(end_time, end_time1);
2182 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2183 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2184 p->start_time = start_time1;
2185 if(p->end_time < end_time1)
2186 p->end_time = end_time1;
2189 if (st->duration != AV_NOPTS_VALUE) {
2190 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2191 duration = FFMAX(duration, duration1);
2194 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2195 start_time = start_time_text;
2196 else if(start_time > start_time_text)
2197 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2199 if (start_time != INT64_MAX) {
2200 ic->start_time = start_time;
2201 if (end_time != INT64_MIN) {
2202 if (ic->nb_programs) {
2203 for (i=0; i<ic->nb_programs; i++) {
2204 p = ic->programs[i];
2205 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2206 duration = FFMAX(duration, p->end_time - p->start_time);
2209 duration = FFMAX(duration, end_time - start_time);
2212 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2213 ic->duration = duration;
2215 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2216 /* compute the bitrate */
2217 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2218 (double)ic->duration;
2222 static void fill_all_stream_timings(AVFormatContext *ic)
2227 update_stream_timings(ic);
2228 for(i = 0;i < ic->nb_streams; i++) {
2229 st = ic->streams[i];
2230 if (st->start_time == AV_NOPTS_VALUE) {
2231 if(ic->start_time != AV_NOPTS_VALUE)
2232 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2233 if(ic->duration != AV_NOPTS_VALUE)
2234 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2239 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2241 int64_t filesize, duration;
2245 /* if bit_rate is already set, we believe it */
2246 if (ic->bit_rate <= 0) {
2248 for(i=0;i<ic->nb_streams;i++) {
2249 st = ic->streams[i];
2250 if (st->codec->bit_rate > 0)
2251 bit_rate += st->codec->bit_rate;
2253 ic->bit_rate = bit_rate;
2256 /* if duration is already set, we believe it */
2257 if (ic->duration == AV_NOPTS_VALUE &&
2258 ic->bit_rate != 0) {
2259 filesize = ic->pb ? avio_size(ic->pb) : 0;
2261 for(i = 0; i < ic->nb_streams; i++) {
2262 st = ic->streams[i];
2263 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2264 if (st->duration == AV_NOPTS_VALUE)
2265 st->duration = duration;
2271 #define DURATION_MAX_READ_SIZE 250000LL
2272 #define DURATION_MAX_RETRY 4
2274 /* only usable for MPEG-PS streams */
2275 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2277 AVPacket pkt1, *pkt = &pkt1;
2279 int read_size, i, ret;
2281 int64_t filesize, offset, duration;
2284 /* flush packet queue */
2285 flush_packet_queue(ic);
2287 for (i=0; i<ic->nb_streams; i++) {
2288 st = ic->streams[i];
2289 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2290 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2293 av_parser_close(st->parser);
2298 /* estimate the end time (duration) */
2299 /* XXX: may need to support wrapping */
2300 filesize = ic->pb ? avio_size(ic->pb) : 0;
2301 end_time = AV_NOPTS_VALUE;
2303 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2307 avio_seek(ic->pb, offset, SEEK_SET);
2310 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2314 ret = ff_read_packet(ic, pkt);
2315 } while(ret == AVERROR(EAGAIN));
2318 read_size += pkt->size;
2319 st = ic->streams[pkt->stream_index];
2320 if (pkt->pts != AV_NOPTS_VALUE &&
2321 (st->start_time != AV_NOPTS_VALUE ||
2322 st->first_dts != AV_NOPTS_VALUE)) {
2323 duration = end_time = pkt->pts;
2324 if (st->start_time != AV_NOPTS_VALUE)
2325 duration -= st->start_time;
2327 duration -= st->first_dts;
2329 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2330 st->duration = duration;
2333 av_free_packet(pkt);
2335 }while( end_time==AV_NOPTS_VALUE
2336 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2337 && ++retry <= DURATION_MAX_RETRY);
2339 fill_all_stream_timings(ic);
2341 avio_seek(ic->pb, old_offset, SEEK_SET);
2342 for (i=0; i<ic->nb_streams; i++) {
2344 st->cur_dts= st->first_dts;
2345 st->last_IP_pts = AV_NOPTS_VALUE;
2346 st->reference_dts = AV_NOPTS_VALUE;
2350 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2354 /* get the file size, if possible */
2355 if (ic->iformat->flags & AVFMT_NOFILE) {
2358 file_size = avio_size(ic->pb);
2359 file_size = FFMAX(0, file_size);
2362 if ((!strcmp(ic->iformat->name, "mpeg") ||
2363 !strcmp(ic->iformat->name, "mpegts")) &&
2364 file_size && ic->pb->seekable) {
2365 /* get accurate estimate from the PTSes */
2366 estimate_timings_from_pts(ic, old_offset);
2367 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2368 } else if (has_duration(ic)) {
2369 /* at least one component has timings - we use them for all
2371 fill_all_stream_timings(ic);
2372 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2374 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2375 /* less precise: use bitrate info */
2376 estimate_timings_from_bit_rate(ic);
2377 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2379 update_stream_timings(ic);
2383 AVStream av_unused *st;
2384 for(i = 0;i < ic->nb_streams; i++) {
2385 st = ic->streams[i];
2386 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2387 (double) st->start_time / AV_TIME_BASE,
2388 (double) st->duration / AV_TIME_BASE);
2390 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2391 (double) ic->start_time / AV_TIME_BASE,
2392 (double) ic->duration / AV_TIME_BASE,
2393 ic->bit_rate / 1000);
2397 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2399 AVCodecContext *avctx = st->codec;
2401 #define FAIL(errmsg) do { \
2403 *errmsg_ptr = errmsg; \
2407 switch (avctx->codec_type) {
2408 case AVMEDIA_TYPE_AUDIO:
2409 if (!avctx->frame_size && determinable_frame_size(avctx))
2410 FAIL("unspecified frame size");
2411 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2412 FAIL("unspecified sample format");
2413 if (!avctx->sample_rate)
2414 FAIL("unspecified sample rate");
2415 if (!avctx->channels)
2416 FAIL("unspecified number of channels");
2417 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2418 FAIL("no decodable DTS frames");
2420 case AVMEDIA_TYPE_VIDEO:
2422 FAIL("unspecified size");
2423 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2424 FAIL("unspecified pixel format");
2426 case AVMEDIA_TYPE_SUBTITLE:
2427 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2428 FAIL("unspecified size");
2430 case AVMEDIA_TYPE_DATA:
2431 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2434 if (avctx->codec_id == AV_CODEC_ID_NONE)
2435 FAIL("unknown codec");
2439 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2440 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2442 const AVCodec *codec;
2443 int got_picture = 1, ret = 0;
2444 AVFrame *frame = avcodec_alloc_frame();
2445 AVSubtitle subtitle;
2446 AVPacket pkt = *avpkt;
2449 return AVERROR(ENOMEM);
2451 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2452 AVDictionary *thread_opt = NULL;
2454 codec = st->codec->codec ? st->codec->codec :
2455 avcodec_find_decoder(st->codec->codec_id);
2458 st->info->found_decoder = -1;
2463 /* force thread count to 1 since the h264 decoder will not extract SPS
2464 * and PPS to extradata during multi-threaded decoding */
2465 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2466 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2468 av_dict_free(&thread_opt);
2470 st->info->found_decoder = -1;
2473 st->info->found_decoder = 1;
2474 } else if (!st->info->found_decoder)
2475 st->info->found_decoder = 1;
2477 if (st->info->found_decoder < 0) {
2482 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2484 (!has_codec_parameters(st, NULL) ||
2485 !has_decode_delay_been_guessed(st) ||
2486 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2488 avcodec_get_frame_defaults(frame);
2489 switch(st->codec->codec_type) {
2490 case AVMEDIA_TYPE_VIDEO:
2491 ret = avcodec_decode_video2(st->codec, frame,
2492 &got_picture, &pkt);
2494 case AVMEDIA_TYPE_AUDIO:
2495 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2497 case AVMEDIA_TYPE_SUBTITLE:
2498 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2499 &got_picture, &pkt);
2507 st->nb_decoded_frames++;
2514 if(!pkt.data && !got_picture)
2518 avcodec_free_frame(&frame);
2522 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2524 while (tags->id != AV_CODEC_ID_NONE) {
2532 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2535 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2536 if(tag == tags[i].tag)
2539 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2540 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2543 return AV_CODEC_ID_NONE;
2546 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2550 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2551 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2552 default: return AV_CODEC_ID_NONE;
2557 if (sflags & (1 << (bps - 1))) {
2559 case 1: return AV_CODEC_ID_PCM_S8;
2560 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2561 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2562 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2563 default: return AV_CODEC_ID_NONE;
2567 case 1: return AV_CODEC_ID_PCM_U8;
2568 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2569 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2570 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2571 default: return AV_CODEC_ID_NONE;
2577 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2580 for(i=0; tags && tags[i]; i++){
2581 int tag= ff_codec_get_tag(tags[i], id);
2587 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2590 for(i=0; tags && tags[i]; i++){
2591 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2592 if(id!=AV_CODEC_ID_NONE) return id;
2594 return AV_CODEC_ID_NONE;
2597 static void compute_chapters_end(AVFormatContext *s)
2600 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2602 for (i = 0; i < s->nb_chapters; i++)
2603 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2604 AVChapter *ch = s->chapters[i];
2605 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2608 for (j = 0; j < s->nb_chapters; j++) {
2609 AVChapter *ch1 = s->chapters[j];
2610 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2611 if (j != i && next_start > ch->start && next_start < end)
2614 ch->end = (end == INT64_MAX) ? ch->start : end;
2618 static int get_std_framerate(int i){
2619 if(i<60*12) return (i+1)*1001;
2620 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2624 * Is the time base unreliable.
2625 * This is a heuristic to balance between quick acceptance of the values in
2626 * the headers vs. some extra checks.
2627 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2628 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2629 * And there are "variable" fps files this needs to detect as well.
2631 static int tb_unreliable(AVCodecContext *c){
2632 if( c->time_base.den >= 101L*c->time_base.num
2633 || c->time_base.den < 5L*c->time_base.num
2634 /* || c->codec_tag == AV_RL32("DIVX")
2635 || c->codec_tag == AV_RL32("XVID")*/
2636 || c->codec_tag == AV_RL32("mp4v")
2637 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2638 || c->codec_id == AV_CODEC_ID_H264
2644 #if FF_API_FORMAT_PARAMETERS
2645 int av_find_stream_info(AVFormatContext *ic)
2647 return avformat_find_stream_info(ic, NULL);
2651 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2653 int i, count, ret, read_size, j;
2655 AVPacket pkt1, *pkt;
2656 int64_t old_offset = avio_tell(ic->pb);
2657 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2658 int flush_codecs = ic->probesize > 0;
2661 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2663 for(i=0;i<ic->nb_streams;i++) {
2664 const AVCodec *codec;
2665 AVDictionary *thread_opt = NULL;
2666 st = ic->streams[i];
2668 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2669 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2670 /* if(!st->time_base.num)
2672 if(!st->codec->time_base.num)
2673 st->codec->time_base= st->time_base;
2675 //only for the split stuff
2676 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2677 st->parser = av_parser_init(st->codec->codec_id);
2679 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2680 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2681 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2682 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2684 } else if (st->need_parsing) {
2685 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2686 "%s, packets or times may be invalid.\n",
2687 avcodec_get_name(st->codec->codec_id));
2690 codec = st->codec->codec ? st->codec->codec :
2691 avcodec_find_decoder(st->codec->codec_id);
2693 /* force thread count to 1 since the h264 decoder will not extract SPS
2694 * and PPS to extradata during multi-threaded decoding */
2695 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2697 /* Ensure that subtitle_header is properly set. */
2698 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2699 && codec && !st->codec->codec)
2700 avcodec_open2(st->codec, codec, options ? &options[i]
2703 //try to just open decoders, in case this is enough to get parameters
2704 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2705 if (codec && !st->codec->codec)
2706 avcodec_open2(st->codec, codec, options ? &options[i]
2710 av_dict_free(&thread_opt);
2713 for (i=0; i<ic->nb_streams; i++) {
2714 #if FF_API_R_FRAME_RATE
2715 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2717 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2718 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2724 if (ff_check_interrupt(&ic->interrupt_callback)){
2726 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2730 /* check if one codec still needs to be handled */
2731 for(i=0;i<ic->nb_streams;i++) {
2732 int fps_analyze_framecount = 20;
2734 st = ic->streams[i];
2735 if (!has_codec_parameters(st, NULL))
2737 /* if the timebase is coarse (like the usual millisecond precision
2738 of mkv), we need to analyze more frames to reliably arrive at
2740 if (av_q2d(st->time_base) > 0.0005)
2741 fps_analyze_framecount *= 2;
2742 if (ic->fps_probe_size >= 0)
2743 fps_analyze_framecount = ic->fps_probe_size;
2744 /* variable fps and no guess at the real fps */
2745 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2746 && st->info->duration_count < fps_analyze_framecount
2747 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2749 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2751 if (st->first_dts == AV_NOPTS_VALUE &&
2752 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2753 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2756 if (i == ic->nb_streams) {
2757 /* NOTE: if the format has no header, then we need to read
2758 some packets to get most of the streams, so we cannot
2760 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2761 /* if we found the info for all the codecs, we can stop */
2763 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2768 /* we did not get all the codec info, but we read too much data */
2769 if (read_size >= ic->probesize) {
2771 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2772 for (i = 0; i < ic->nb_streams; i++)
2773 if (!ic->streams[i]->r_frame_rate.num &&
2774 ic->streams[i]->info->duration_count <= 1)
2775 av_log(ic, AV_LOG_WARNING,
2776 "Stream #%d: not enough frames to estimate rate; "
2777 "consider increasing probesize\n", i);
2781 /* NOTE: a new stream can be added there if no header in file
2782 (AVFMTCTX_NOHEADER) */
2783 ret = read_frame_internal(ic, &pkt1);
2784 if (ret == AVERROR(EAGAIN))
2792 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2795 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2796 &ic->packet_buffer_end);
2797 if ((ret = av_dup_packet(pkt)) < 0)
2798 goto find_stream_info_err;
2801 read_size += pkt->size;
2803 st = ic->streams[pkt->stream_index];
2804 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2805 /* check for non-increasing dts */
2806 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2807 st->info->fps_last_dts >= pkt->dts) {
2808 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS 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;
2814 /* check for a discontinuity in dts - if the difference in dts
2815 * is more than 1000 times the average packet duration in the sequence,
2816 * we treat it as a discontinuity */
2817 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2818 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2819 (pkt->dts - st->info->fps_last_dts) / 1000 >
2820 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2821 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2822 "packet %d with DTS %"PRId64", packet %d with DTS "
2823 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2824 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2825 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2828 /* update stored dts values */
2829 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2830 st->info->fps_first_dts = pkt->dts;
2831 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2833 st->info->fps_last_dts = pkt->dts;
2834 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2836 if (st->codec_info_nb_frames>1) {
2838 if (st->time_base.den > 0)
2839 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2840 if (st->avg_frame_rate.num > 0)
2841 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2843 if (t >= ic->max_analyze_duration) {
2844 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2847 if (pkt->duration) {
2848 st->info->codec_info_duration += pkt->duration;
2849 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2852 #if FF_API_R_FRAME_RATE
2854 int64_t last = st->info->last_dts;
2856 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2857 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2858 int64_t duration= pkt->dts - last;
2860 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2861 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2862 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2863 int framerate= get_std_framerate(i);
2864 double sdts= dts*framerate/(1001*12);
2866 int64_t ticks= llrint(sdts+j*0.5);
2867 double error= sdts - ticks + j*0.5;
2868 st->info->duration_error[j][0][i] += error;
2869 st->info->duration_error[j][1][i] += error*error;
2872 st->info->duration_count++;
2873 // ignore the first 4 values, they might have some random jitter
2874 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2875 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2877 if (pkt->dts != AV_NOPTS_VALUE)
2878 st->info->last_dts = pkt->dts;
2881 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2882 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2883 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2884 st->codec->extradata_size= i;
2885 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2886 if (!st->codec->extradata)
2887 return AVERROR(ENOMEM);
2888 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2889 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2893 /* if still no information, we try to open the codec and to
2894 decompress the frame. We try to avoid that in most cases as
2895 it takes longer and uses more memory. For MPEG-4, we need to
2896 decompress for QuickTime.
2898 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2899 least one frame of codec data, this makes sure the codec initializes
2900 the channel configuration and does not only trust the values from the container.
2902 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2904 st->codec_info_nb_frames++;
2909 AVPacket empty_pkt = { 0 };
2911 av_init_packet(&empty_pkt);
2913 ret = -1; /* we could not have all the codec parameters before EOF */
2914 for(i=0;i<ic->nb_streams;i++) {
2917 st = ic->streams[i];
2919 /* flush the decoders */
2920 if (st->info->found_decoder == 1) {
2922 err = try_decode_frame(st, &empty_pkt,
2923 (options && i < orig_nb_streams) ?
2924 &options[i] : NULL);
2925 } while (err > 0 && !has_codec_parameters(st, NULL));
2928 av_log(ic, AV_LOG_INFO,
2929 "decoding for stream %d failed\n", st->index);
2933 if (!has_codec_parameters(st, &errmsg)) {
2935 avcodec_string(buf, sizeof(buf), st->codec, 0);
2936 av_log(ic, AV_LOG_WARNING,
2937 "Could not find codec parameters for stream %d (%s): %s\n"
2938 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2946 // close codecs which were opened in try_decode_frame()
2947 for(i=0;i<ic->nb_streams;i++) {
2948 st = ic->streams[i];
2949 avcodec_close(st->codec);
2951 for(i=0;i<ic->nb_streams;i++) {
2952 st = ic->streams[i];
2953 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2954 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2955 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2956 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2957 st->codec->codec_tag= tag;
2960 /* estimate average framerate if not set by demuxer */
2961 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2963 double best_error = 0.01;
2965 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2966 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2967 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2969 /* round guessed framerate to a "standard" framerate if it's
2970 * within 1% of the original estimate*/
2971 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2972 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2973 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2975 if (error < best_error) {
2977 best_fps = std_fps.num;
2981 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2982 best_fps, 12*1001, INT_MAX);
2985 // the check for tb_unreliable() is not completely correct, since this is not about handling
2986 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2987 // ipmovie.c produces.
2988 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)
2989 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);
2990 if (st->info->duration_count>1 && !st->r_frame_rate.num
2991 && tb_unreliable(st->codec)) {
2993 double best_error= 0.01;
2995 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2998 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
3000 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
3003 int n= st->info->duration_count;
3004 double a= st->info->duration_error[k][0][j] / n;
3005 double error= st->info->duration_error[k][1][j]/n - a*a;
3007 if(error < best_error && best_error> 0.000000001){
3009 num = get_std_framerate(j);
3012 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3015 // do not increase frame rate by more than 1 % in order to match a standard rate.
3016 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
3017 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3020 if (!st->r_frame_rate.num){
3021 if( st->codec->time_base.den * (int64_t)st->time_base.num
3022 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
3023 st->r_frame_rate.num = st->codec->time_base.den;
3024 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3026 st->r_frame_rate.num = st->time_base.den;
3027 st->r_frame_rate.den = st->time_base.num;
3030 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3031 if(!st->codec->bits_per_coded_sample)
3032 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
3033 // set stream disposition based on audio service type
3034 switch (st->codec->audio_service_type) {
3035 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3036 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
3037 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3038 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
3039 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3040 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
3041 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3042 st->disposition = AV_DISPOSITION_COMMENT; break;
3043 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3044 st->disposition = AV_DISPOSITION_KARAOKE; break;
3050 estimate_timings(ic, old_offset);
3052 compute_chapters_end(ic);
3054 find_stream_info_err:
3055 for (i=0; i < ic->nb_streams; i++) {
3056 if (ic->streams[i]->codec)
3057 ic->streams[i]->codec->thread_count = 0;
3058 av_freep(&ic->streams[i]->info);
3061 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
3065 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3069 for (i = 0; i < ic->nb_programs; i++) {
3070 if (ic->programs[i] == last) {
3074 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3075 if (ic->programs[i]->stream_index[j] == s)
3076 return ic->programs[i];
3082 int av_find_best_stream(AVFormatContext *ic,
3083 enum AVMediaType type,
3084 int wanted_stream_nb,
3086 AVCodec **decoder_ret,
3089 int i, nb_streams = ic->nb_streams;
3090 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3091 unsigned *program = NULL;
3092 AVCodec *decoder = NULL, *best_decoder = NULL;
3094 if (related_stream >= 0 && wanted_stream_nb < 0) {
3095 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3097 program = p->stream_index;
3098 nb_streams = p->nb_stream_indexes;
3101 for (i = 0; i < nb_streams; i++) {
3102 int real_stream_index = program ? program[i] : i;
3103 AVStream *st = ic->streams[real_stream_index];
3104 AVCodecContext *avctx = st->codec;
3105 if (avctx->codec_type != type)
3107 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3109 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3112 decoder = avcodec_find_decoder(st->codec->codec_id);
3115 ret = AVERROR_DECODER_NOT_FOUND;
3119 count = st->codec_info_nb_frames;
3120 bitrate = avctx->bit_rate;
3121 multiframe = FFMIN(5, count);
3122 if ((best_multiframe > multiframe) ||
3123 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3124 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3127 best_bitrate = bitrate;
3128 best_multiframe = multiframe;
3129 ret = real_stream_index;
3130 best_decoder = decoder;
3131 if (program && i == nb_streams - 1 && ret < 0) {
3133 nb_streams = ic->nb_streams;
3134 i = 0; /* no related stream found, try again with everything */
3138 *decoder_ret = best_decoder;
3142 /*******************************************************/
3144 int av_read_play(AVFormatContext *s)
3146 if (s->iformat->read_play)
3147 return s->iformat->read_play(s);
3149 return avio_pause(s->pb, 0);
3150 return AVERROR(ENOSYS);
3153 int av_read_pause(AVFormatContext *s)
3155 if (s->iformat->read_pause)
3156 return s->iformat->read_pause(s);
3158 return avio_pause(s->pb, 1);
3159 return AVERROR(ENOSYS);
3162 void ff_free_stream(AVFormatContext *s, AVStream *st){
3163 av_assert0(s->nb_streams>0);
3164 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3167 av_parser_close(st->parser);
3169 if (st->attached_pic.data)
3170 av_free_packet(&st->attached_pic);
3171 av_dict_free(&st->metadata);
3172 av_freep(&st->index_entries);
3173 av_freep(&st->codec->extradata);
3174 av_freep(&st->codec->subtitle_header);
3175 av_freep(&st->codec);
3176 av_freep(&st->priv_data);
3177 av_freep(&st->info);
3178 av_freep(&st->probe_data.buf);
3179 av_freep(&s->streams[ --s->nb_streams ]);
3182 void avformat_free_context(AVFormatContext *s)
3190 if (s->iformat && s->iformat->priv_class && s->priv_data)
3191 av_opt_free(s->priv_data);
3193 for(i=s->nb_streams-1; i>=0; i--) {
3194 ff_free_stream(s, s->streams[i]);
3196 for(i=s->nb_programs-1; i>=0; i--) {
3197 av_dict_free(&s->programs[i]->metadata);
3198 av_freep(&s->programs[i]->stream_index);
3199 av_freep(&s->programs[i]);
3201 av_freep(&s->programs);
3202 av_freep(&s->priv_data);
3203 while(s->nb_chapters--) {
3204 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3205 av_freep(&s->chapters[s->nb_chapters]);
3207 av_freep(&s->chapters);
3208 av_dict_free(&s->metadata);
3209 av_freep(&s->streams);
3213 #if FF_API_CLOSE_INPUT_FILE
3214 void av_close_input_file(AVFormatContext *s)
3216 avformat_close_input(&s);
3220 void avformat_close_input(AVFormatContext **ps)
3222 AVFormatContext *s = *ps;
3223 AVIOContext *pb = s->pb;
3225 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3226 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3229 flush_packet_queue(s);
3232 if (s->iformat->read_close)
3233 s->iformat->read_close(s);
3236 avformat_free_context(s);
3243 #if FF_API_NEW_STREAM
3244 AVStream *av_new_stream(AVFormatContext *s, int id)
3246 AVStream *st = avformat_new_stream(s, NULL);
3253 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3259 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3261 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3264 s->streams = streams;
3266 st = av_mallocz(sizeof(AVStream));
3269 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3273 st->info->last_dts = AV_NOPTS_VALUE;
3275 st->codec = avcodec_alloc_context3(c);
3277 /* no default bitrate if decoding */
3278 st->codec->bit_rate = 0;
3280 st->index = s->nb_streams;
3281 st->start_time = AV_NOPTS_VALUE;
3282 st->duration = AV_NOPTS_VALUE;
3283 /* we set the current DTS to 0 so that formats without any timestamps
3284 but durations get some timestamps, formats with some unknown
3285 timestamps have their first few packets buffered and the
3286 timestamps corrected before they are returned to the user */
3287 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3288 st->first_dts = AV_NOPTS_VALUE;
3289 st->probe_packets = MAX_PROBE_PACKETS;
3290 st->pts_wrap_reference = AV_NOPTS_VALUE;
3291 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3293 /* default pts setting is MPEG-like */
3294 avpriv_set_pts_info(st, 33, 1, 90000);
3295 st->last_IP_pts = AV_NOPTS_VALUE;
3296 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3297 st->pts_buffer[i]= AV_NOPTS_VALUE;
3298 st->reference_dts = AV_NOPTS_VALUE;
3300 st->sample_aspect_ratio = (AVRational){0,1};
3302 #if FF_API_R_FRAME_RATE
3303 st->info->last_dts = AV_NOPTS_VALUE;
3305 st->info->fps_first_dts = AV_NOPTS_VALUE;
3306 st->info->fps_last_dts = AV_NOPTS_VALUE;
3308 s->streams[s->nb_streams++] = st;
3312 AVProgram *av_new_program(AVFormatContext *ac, int id)
3314 AVProgram *program=NULL;
3317 av_dlog(ac, "new_program: id=0x%04x\n", id);
3319 for(i=0; i<ac->nb_programs; i++)
3320 if(ac->programs[i]->id == id)
3321 program = ac->programs[i];
3324 program = av_mallocz(sizeof(AVProgram));
3327 dynarray_add(&ac->programs, &ac->nb_programs, program);
3328 program->discard = AVDISCARD_NONE;
3331 program->pts_wrap_reference = AV_NOPTS_VALUE;
3332 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3334 program->start_time =
3335 program->end_time = AV_NOPTS_VALUE;
3340 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3342 AVChapter *chapter = NULL;
3345 for(i=0; i<s->nb_chapters; i++)
3346 if(s->chapters[i]->id == id)
3347 chapter = s->chapters[i];
3350 chapter= av_mallocz(sizeof(AVChapter));
3353 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3355 av_dict_set(&chapter->metadata, "title", title, 0);
3357 chapter->time_base= time_base;
3358 chapter->start = start;
3364 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3367 AVProgram *program=NULL;
3370 if (idx >= ac->nb_streams) {
3371 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3375 for(i=0; i<ac->nb_programs; i++){
3376 if(ac->programs[i]->id != progid)
3378 program = ac->programs[i];
3379 for(j=0; j<program->nb_stream_indexes; j++)
3380 if(program->stream_index[j] == idx)
3383 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3386 program->stream_index = tmp;
3387 program->stream_index[program->nb_stream_indexes++] = idx;
3392 static void print_fps(double d, const char *postfix){
3393 uint64_t v= lrintf(d*100);
3394 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3395 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3396 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3399 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3401 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3402 AVDictionaryEntry *tag=NULL;
3404 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3405 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3406 if(strcmp("language", tag->key)){
3407 const char *p = tag->value;
3408 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3411 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3412 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3413 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3415 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3416 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3419 av_log(ctx, AV_LOG_INFO, "\n");
3425 /* "user interface" functions */
3426 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3429 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3430 AVStream *st = ic->streams[i];
3431 int g = av_gcd(st->time_base.num, st->time_base.den);
3432 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3433 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3434 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3435 /* the pid is an important information, so we display it */
3436 /* XXX: add a generic system */
3437 if (flags & AVFMT_SHOW_IDS)
3438 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3440 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3441 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3442 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3443 if (st->sample_aspect_ratio.num && // default
3444 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3445 AVRational display_aspect_ratio;
3446 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3447 st->codec->width*st->sample_aspect_ratio.num,
3448 st->codec->height*st->sample_aspect_ratio.den,
3450 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3451 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3452 display_aspect_ratio.num, display_aspect_ratio.den);
3454 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3455 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3456 print_fps(av_q2d(st->avg_frame_rate), "fps");
3457 #if FF_API_R_FRAME_RATE
3458 if(st->r_frame_rate.den && st->r_frame_rate.num)
3459 print_fps(av_q2d(st->r_frame_rate), "tbr");
3461 if(st->time_base.den && st->time_base.num)
3462 print_fps(1/av_q2d(st->time_base), "tbn");
3463 if(st->codec->time_base.den && st->codec->time_base.num)
3464 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3466 if (st->disposition & AV_DISPOSITION_DEFAULT)
3467 av_log(NULL, AV_LOG_INFO, " (default)");
3468 if (st->disposition & AV_DISPOSITION_DUB)
3469 av_log(NULL, AV_LOG_INFO, " (dub)");
3470 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3471 av_log(NULL, AV_LOG_INFO, " (original)");
3472 if (st->disposition & AV_DISPOSITION_COMMENT)
3473 av_log(NULL, AV_LOG_INFO, " (comment)");
3474 if (st->disposition & AV_DISPOSITION_LYRICS)
3475 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3476 if (st->disposition & AV_DISPOSITION_KARAOKE)
3477 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3478 if (st->disposition & AV_DISPOSITION_FORCED)
3479 av_log(NULL, AV_LOG_INFO, " (forced)");
3480 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3481 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3482 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3483 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3484 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3485 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3486 av_log(NULL, AV_LOG_INFO, "\n");
3487 dump_metadata(NULL, st->metadata, " ");
3490 void av_dump_format(AVFormatContext *ic,
3496 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3497 if (ic->nb_streams && !printed)
3500 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3501 is_output ? "Output" : "Input",
3503 is_output ? ic->oformat->name : ic->iformat->name,
3504 is_output ? "to" : "from", url);
3505 dump_metadata(NULL, ic->metadata, " ");
3507 av_log(NULL, AV_LOG_INFO, " Duration: ");
3508 if (ic->duration != AV_NOPTS_VALUE) {
3509 int hours, mins, secs, us;
3510 int64_t duration = ic->duration + 5000;
3511 secs = duration / AV_TIME_BASE;
3512 us = duration % AV_TIME_BASE;
3517 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3518 (100 * us) / AV_TIME_BASE);
3520 av_log(NULL, AV_LOG_INFO, "N/A");
3522 if (ic->start_time != AV_NOPTS_VALUE) {
3524 av_log(NULL, AV_LOG_INFO, ", start: ");
3525 secs = ic->start_time / AV_TIME_BASE;
3526 us = abs(ic->start_time % AV_TIME_BASE);
3527 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3528 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3530 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3532 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3534 av_log(NULL, AV_LOG_INFO, "N/A");
3536 av_log(NULL, AV_LOG_INFO, "\n");
3538 for (i = 0; i < ic->nb_chapters; i++) {
3539 AVChapter *ch = ic->chapters[i];
3540 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3541 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3542 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3544 dump_metadata(NULL, ch->metadata, " ");
3546 if(ic->nb_programs) {
3547 int j, k, total = 0;
3548 for(j=0; j<ic->nb_programs; j++) {
3549 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3551 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3552 name ? name->value : "");
3553 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3554 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3555 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3556 printed[ic->programs[j]->stream_index[k]] = 1;
3558 total += ic->programs[j]->nb_stream_indexes;
3560 if (total < ic->nb_streams)
3561 av_log(NULL, AV_LOG_INFO, " No Program\n");
3563 for(i=0;i<ic->nb_streams;i++)
3565 dump_stream_format(ic, i, index, is_output);
3570 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3571 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3573 return av_gettime();
3577 uint64_t ff_ntp_time(void)
3579 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3582 int av_get_frame_filename(char *buf, int buf_size,
3583 const char *path, int number)
3586 char *q, buf1[20], c;
3587 int nd, len, percentd_found;
3599 while (isdigit(*p)) {
3600 nd = nd * 10 + *p++ - '0';
3603 } while (isdigit(c));
3612 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3614 if ((q - buf + len) > buf_size - 1)
3616 memcpy(q, buf1, len);
3624 if ((q - buf) < buf_size - 1)
3628 if (!percentd_found)
3637 static void hex_dump_internal(void *avcl, FILE *f, int level,
3638 const uint8_t *buf, int size)
3641 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3643 for(i=0;i<size;i+=16) {
3650 PRINT(" %02x", buf[i+j]);
3655 for(j=0;j<len;j++) {
3657 if (c < ' ' || c > '~')
3666 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3668 hex_dump_internal(NULL, f, 0, buf, size);
3671 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3673 hex_dump_internal(avcl, NULL, level, buf, size);
3676 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3678 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3679 PRINT("stream #%d:\n", pkt->stream_index);
3680 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3681 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3682 /* DTS is _always_ valid after av_read_frame() */
3684 if (pkt->dts == AV_NOPTS_VALUE)
3687 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3688 /* PTS may not be known if B-frames are present. */
3690 if (pkt->pts == AV_NOPTS_VALUE)
3693 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3695 PRINT(" size=%d\n", pkt->size);
3698 av_hex_dump(f, pkt->data, pkt->size);
3702 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3704 AVRational tb = { 1, AV_TIME_BASE };
3705 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3709 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3711 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3715 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3717 AVRational tb = { 1, AV_TIME_BASE };
3718 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3722 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3725 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3728 void av_url_split(char *proto, int proto_size,
3729 char *authorization, int authorization_size,
3730 char *hostname, int hostname_size,
3732 char *path, int path_size,
3735 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3737 if (port_ptr) *port_ptr = -1;
3738 if (proto_size > 0) proto[0] = 0;
3739 if (authorization_size > 0) authorization[0] = 0;
3740 if (hostname_size > 0) hostname[0] = 0;
3741 if (path_size > 0) path[0] = 0;
3743 /* parse protocol */
3744 if ((p = strchr(url, ':'))) {
3745 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3750 /* no protocol means plain filename */
3751 av_strlcpy(path, url, path_size);
3755 /* separate path from hostname */
3756 ls = strchr(p, '/');
3757 ls2 = strchr(p, '?');
3761 ls = FFMIN(ls, ls2);
3763 av_strlcpy(path, ls, path_size);
3765 ls = &p[strlen(p)]; // XXX
3767 /* the rest is hostname, use that to parse auth/port */
3769 /* authorization (user[:pass]@hostname) */
3771 while ((at = strchr(p, '@')) && at < ls) {
3772 av_strlcpy(authorization, at2,
3773 FFMIN(authorization_size, at + 1 - at2));
3774 p = at + 1; /* skip '@' */
3777 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3779 av_strlcpy(hostname, p + 1,
3780 FFMIN(hostname_size, brk - p));
3781 if (brk[1] == ':' && port_ptr)
3782 *port_ptr = atoi(brk + 2);
3783 } else if ((col = strchr(p, ':')) && col < ls) {
3784 av_strlcpy(hostname, p,
3785 FFMIN(col + 1 - p, hostname_size));
3786 if (port_ptr) *port_ptr = atoi(col + 1);
3788 av_strlcpy(hostname, p,
3789 FFMIN(ls + 1 - p, hostname_size));
3793 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3796 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3799 'C', 'D', 'E', 'F' };
3800 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3803 'c', 'd', 'e', 'f' };
3804 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3806 for(i = 0; i < s; i++) {
3807 buff[i * 2] = hex_table[src[i] >> 4];
3808 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3814 int ff_hex_to_data(uint8_t *data, const char *p)
3821 p += strspn(p, SPACE_CHARS);
3824 c = toupper((unsigned char) *p++);
3825 if (c >= '0' && c <= '9')
3827 else if (c >= 'A' && c <= 'F')
3842 #if FF_API_SET_PTS_INFO
3843 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3844 unsigned int pts_num, unsigned int pts_den)
3846 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3850 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3851 unsigned int pts_num, unsigned int pts_den)
3854 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3855 if(new_tb.num != pts_num)
3856 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3858 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3860 if(new_tb.num <= 0 || new_tb.den <= 0) {
3861 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);
3864 s->time_base = new_tb;
3865 av_codec_set_pkt_timebase(s->codec, new_tb);
3866 s->pts_wrap_bits = pts_wrap_bits;
3869 int ff_url_join(char *str, int size, const char *proto,
3870 const char *authorization, const char *hostname,
3871 int port, const char *fmt, ...)
3874 struct addrinfo hints = { 0 }, *ai;
3879 av_strlcatf(str, size, "%s://", proto);
3880 if (authorization && authorization[0])
3881 av_strlcatf(str, size, "%s@", authorization);
3882 #if CONFIG_NETWORK && defined(AF_INET6)
3883 /* Determine if hostname is a numerical IPv6 address,
3884 * properly escape it within [] in that case. */
3885 hints.ai_flags = AI_NUMERICHOST;
3886 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3887 if (ai->ai_family == AF_INET6) {
3888 av_strlcat(str, "[", size);
3889 av_strlcat(str, hostname, size);
3890 av_strlcat(str, "]", size);
3892 av_strlcat(str, hostname, size);
3897 /* Not an IPv6 address, just output the plain string. */
3898 av_strlcat(str, hostname, size);
3901 av_strlcatf(str, size, ":%d", port);
3904 int len = strlen(str);
3907 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3913 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3914 AVFormatContext *src)
3919 local_pkt.stream_index = dst_stream;
3920 if (pkt->pts != AV_NOPTS_VALUE)
3921 local_pkt.pts = av_rescale_q(pkt->pts,
3922 src->streams[pkt->stream_index]->time_base,
3923 dst->streams[dst_stream]->time_base);
3924 if (pkt->dts != AV_NOPTS_VALUE)
3925 local_pkt.dts = av_rescale_q(pkt->dts,
3926 src->streams[pkt->stream_index]->time_base,
3927 dst->streams[dst_stream]->time_base);
3928 return av_write_frame(dst, &local_pkt);
3931 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3934 const char *ptr = str;
3936 /* Parse key=value pairs. */
3939 char *dest = NULL, *dest_end;
3940 int key_len, dest_len = 0;
3942 /* Skip whitespace and potential commas. */
3943 while (*ptr && (isspace(*ptr) || *ptr == ','))
3950 if (!(ptr = strchr(key, '=')))
3953 key_len = ptr - key;
3955 callback_get_buf(context, key, key_len, &dest, &dest_len);
3956 dest_end = dest + dest_len - 1;
3960 while (*ptr && *ptr != '\"') {
3964 if (dest && dest < dest_end)
3968 if (dest && dest < dest_end)
3976 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3977 if (dest && dest < dest_end)
3985 int ff_find_stream_index(AVFormatContext *s, int id)
3988 for (i = 0; i < s->nb_streams; i++) {
3989 if (s->streams[i]->id == id)
3995 void ff_make_absolute_url(char *buf, int size, const char *base,
3998 char *sep, *path_query;
3999 /* Absolute path, relative to the current server */
4000 if (base && strstr(base, "://") && rel[0] == '/') {
4002 av_strlcpy(buf, base, size);
4003 sep = strstr(buf, "://");
4005 /* Take scheme from base url */
4006 if (rel[1] == '/') {
4009 /* Take scheme and host from base url */
4011 sep = strchr(sep, '/');
4016 av_strlcat(buf, rel, size);
4019 /* If rel actually is an absolute url, just copy it */
4020 if (!base || strstr(rel, "://") || rel[0] == '/') {
4021 av_strlcpy(buf, rel, size);
4025 av_strlcpy(buf, base, size);
4027 /* Strip off any query string from base */
4028 path_query = strchr(buf, '?');
4029 if (path_query != NULL)
4032 /* Is relative path just a new query part? */
4033 if (rel[0] == '?') {
4034 av_strlcat(buf, rel, size);
4038 /* Remove the file name from the base url */
4039 sep = strrchr(buf, '/');
4044 while (av_strstart(rel, "../", NULL) && sep) {
4045 /* Remove the path delimiter at the end */
4047 sep = strrchr(buf, '/');
4048 /* If the next directory name to pop off is "..", break here */
4049 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4050 /* Readd the slash we just removed */
4051 av_strlcat(buf, "/", size);
4054 /* Cut off the directory name */
4061 av_strlcat(buf, rel, size);
4064 int64_t ff_iso8601_to_unix_time(const char *datestr)
4066 struct tm time1 = {0}, time2 = {0};
4068 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4069 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4071 return av_timegm(&time2);
4073 return av_timegm(&time1);
4076 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
4079 if (ofmt->query_codec)
4080 return ofmt->query_codec(codec_id, std_compliance);
4081 else if (ofmt->codec_tag)
4082 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4083 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4084 codec_id == ofmt->subtitle_codec)
4087 return AVERROR_PATCHWELCOME;
4090 int avformat_network_init(void)
4094 ff_network_inited_globally = 1;
4095 if ((ret = ff_network_init()) < 0)
4102 int avformat_network_deinit(void)
4111 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4112 uint64_t channel_layout, int32_t sample_rate,
4113 int32_t width, int32_t height)
4119 return AVERROR(EINVAL);
4122 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4124 if (channel_layout) {
4126 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4130 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4132 if (width || height) {
4134 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4136 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4138 return AVERROR(ENOMEM);
4139 bytestream_put_le32(&data, flags);
4141 bytestream_put_le32(&data, channels);
4143 bytestream_put_le64(&data, channel_layout);
4145 bytestream_put_le32(&data, sample_rate);
4146 if (width || height) {
4147 bytestream_put_le32(&data, width);
4148 bytestream_put_le32(&data, height);
4153 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4155 return ff_codec_bmp_tags;
4157 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4159 return ff_codec_wav_tags;
4162 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4164 AVRational undef = {0, 1};
4165 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4166 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4167 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4169 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4170 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4171 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4172 stream_sample_aspect_ratio = undef;
4174 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4175 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4176 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4177 frame_sample_aspect_ratio = undef;
4179 if (stream_sample_aspect_ratio.num)
4180 return stream_sample_aspect_ratio;
4182 return frame_sample_aspect_ratio;
4185 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4188 if (*spec <= '9' && *spec >= '0') /* opt:index */
4189 return strtol(spec, NULL, 0) == st->index;
4190 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4191 *spec == 't') { /* opt:[vasdt] */
4192 enum AVMediaType type;
4195 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4196 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4197 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4198 case 'd': type = AVMEDIA_TYPE_DATA; break;
4199 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4200 default: av_assert0(0);
4202 if (type != st->codec->codec_type)
4204 if (*spec++ == ':') { /* possibly followed by :index */
4205 int i, index = strtol(spec, NULL, 0);
4206 for (i = 0; i < s->nb_streams; i++)
4207 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4208 return i == st->index;
4212 } else if (*spec == 'p' && *(spec + 1) == ':') {
4216 prog_id = strtol(spec, &endptr, 0);
4217 for (i = 0; i < s->nb_programs; i++) {
4218 if (s->programs[i]->id != prog_id)
4221 if (*endptr++ == ':') {
4222 int stream_idx = strtol(endptr, NULL, 0);
4223 return stream_idx >= 0 &&
4224 stream_idx < s->programs[i]->nb_stream_indexes &&
4225 st->index == s->programs[i]->stream_index[stream_idx];
4228 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4229 if (st->index == s->programs[i]->stream_index[j])
4233 } else if (*spec == '#') {
4236 sid = strtol(spec + 1, &endptr, 0);
4238 return st->id == sid;
4239 } else if (!*spec) /* empty specifier, matches everything */
4242 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4243 return AVERROR(EINVAL);