2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
82 * Wrap a given time stamp, if there is an indication for an overflow
85 * @param timestamp the time stamp to wrap
86 * @return resulting time stamp
88 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
90 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
91 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
92 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
93 timestamp < st->pts_wrap_reference)
94 return timestamp + (1ULL<<st->pts_wrap_bits);
95 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
96 timestamp >= st->pts_wrap_reference)
97 return timestamp - (1ULL<<st->pts_wrap_bits);
102 /** head of registered input format linked list */
103 static AVInputFormat *first_iformat = NULL;
104 /** head of registered output format linked list */
105 static AVOutputFormat *first_oformat = NULL;
107 AVInputFormat *av_iformat_next(AVInputFormat *f)
109 if(f) return f->next;
110 else return first_iformat;
113 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
115 if(f) return f->next;
116 else return first_oformat;
119 void av_register_input_format(AVInputFormat *format)
123 while (*p != NULL) p = &(*p)->next;
128 void av_register_output_format(AVOutputFormat *format)
132 while (*p != NULL) p = &(*p)->next;
137 int av_match_ext(const char *filename, const char *extensions)
145 ext = strrchr(filename, '.');
151 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
154 if (!av_strcasecmp(ext1, ext))
164 static int match_format(const char *name, const char *names)
172 namelen = strlen(name);
173 while ((p = strchr(names, ','))) {
174 len = FFMAX(p - names, namelen);
175 if (!av_strncasecmp(name, names, len))
179 return !av_strcasecmp(name, names);
182 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
183 const char *mime_type)
185 AVOutputFormat *fmt = NULL, *fmt_found;
186 int score_max, score;
188 /* specific test for image sequences */
189 #if CONFIG_IMAGE2_MUXER
190 if (!short_name && filename &&
191 av_filename_number_test(filename) &&
192 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
193 return av_guess_format("image2", NULL, NULL);
196 /* Find the proper file type. */
199 while ((fmt = av_oformat_next(fmt))) {
201 if (fmt->name && short_name && match_format(short_name, fmt->name))
203 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
205 if (filename && fmt->extensions &&
206 av_match_ext(filename, fmt->extensions)) {
209 if (score > score_max) {
217 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
218 const char *filename, const char *mime_type, enum AVMediaType type){
219 if(type == AVMEDIA_TYPE_VIDEO){
220 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
222 #if CONFIG_IMAGE2_MUXER
223 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
224 codec_id= ff_guess_image2_codec(filename);
227 if(codec_id == AV_CODEC_ID_NONE)
228 codec_id= fmt->video_codec;
230 }else if(type == AVMEDIA_TYPE_AUDIO)
231 return fmt->audio_codec;
232 else if (type == AVMEDIA_TYPE_SUBTITLE)
233 return fmt->subtitle_codec;
235 return AV_CODEC_ID_NONE;
238 AVInputFormat *av_find_input_format(const char *short_name)
240 AVInputFormat *fmt = NULL;
241 while ((fmt = av_iformat_next(fmt))) {
242 if (match_format(short_name, fmt->name))
248 int ffio_limit(AVIOContext *s, int size)
251 int64_t remaining= s->maxsize - avio_tell(s);
252 if(remaining < size){
253 int64_t newsize= avio_size(s);
254 if(!s->maxsize || s->maxsize<newsize)
255 s->maxsize= newsize - !newsize;
256 remaining= s->maxsize - avio_tell(s);
257 remaining= FFMAX(remaining, 0);
260 if(s->maxsize>=0 && remaining+1 < size){
261 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
268 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
271 int orig_size = size;
272 size= ffio_limit(s, size);
274 ret= av_new_packet(pkt, size);
279 pkt->pos= avio_tell(s);
281 ret= avio_read(s, pkt->data, size);
285 av_shrink_packet(pkt, ret);
286 if (pkt->size < orig_size)
287 pkt->flags |= AV_PKT_FLAG_CORRUPT;
292 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
297 return av_get_packet(s, pkt, size);
298 old_size = pkt->size;
299 ret = av_grow_packet(pkt, size);
302 ret = avio_read(s, pkt->data + old_size, size);
303 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
308 int av_filename_number_test(const char *filename)
311 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
314 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
316 AVProbeData lpd = *pd;
317 AVInputFormat *fmt1 = NULL, *fmt;
318 int score, nodat = 0, score_max=0;
319 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
322 lpd.buf = zerobuffer;
324 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
325 int id3len = ff_id3v2_tag_len(lpd.buf);
326 if (lpd.buf_size > id3len + 16) {
328 lpd.buf_size -= id3len;
334 while ((fmt1 = av_iformat_next(fmt1))) {
335 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
338 if (fmt1->read_probe) {
339 score = fmt1->read_probe(&lpd);
340 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
341 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
342 } else if (fmt1->extensions) {
343 if (av_match_ext(lpd.filename, fmt1->extensions)) {
347 if (score > score_max) {
350 }else if (score == score_max)
353 *score_ret= score_max;
358 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
361 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
362 if(score_ret > *score_max){
363 *score_max= score_ret;
369 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
371 return av_probe_input_format2(pd, is_opened, &score);
374 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
376 static const struct {
377 const char *name; enum AVCodecID id; enum AVMediaType type;
379 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
380 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
381 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
382 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
383 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
384 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
385 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
386 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
387 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
391 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
393 if (fmt && st->request_probe <= score) {
395 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
396 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
397 for (i = 0; fmt_id_type[i].name; i++) {
398 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
399 st->codec->codec_id = fmt_id_type[i].id;
400 st->codec->codec_type = fmt_id_type[i].type;
408 /************************************************************/
409 /* input media file */
411 int av_demuxer_open(AVFormatContext *ic){
414 if (ic->iformat->read_header) {
415 err = ic->iformat->read_header(ic);
420 if (ic->pb && !ic->data_offset)
421 ic->data_offset = avio_tell(ic->pb);
427 /** size of probe buffer, for guessing file type from file contents */
428 #define PROBE_BUF_MIN 2048
429 #define PROBE_BUF_MAX (1<<20)
431 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
432 const char *filename, void *logctx,
433 unsigned int offset, unsigned int max_probe_size)
435 AVProbeData pd = { filename ? filename : "", NULL, -offset };
436 unsigned char *buf = NULL;
438 int ret = 0, probe_size, buf_offset = 0;
440 if (!max_probe_size) {
441 max_probe_size = PROBE_BUF_MAX;
442 } else if (max_probe_size > PROBE_BUF_MAX) {
443 max_probe_size = PROBE_BUF_MAX;
444 } else if (max_probe_size < PROBE_BUF_MIN) {
445 return AVERROR(EINVAL);
448 if (offset >= max_probe_size) {
449 return AVERROR(EINVAL);
452 if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
453 if (!av_strcasecmp(mime_type, "audio/aacp")) {
454 *fmt = av_find_input_format("aac");
456 av_freep(&mime_type);
459 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
460 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
461 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
464 if (probe_size < offset) {
468 /* read probe data */
469 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
472 return AVERROR(ENOMEM);
475 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
476 /* fail if error was not end of file, otherwise, lower score */
477 if (ret != AVERROR_EOF) {
482 ret = 0; /* error was end of file, nothing read */
484 pd.buf_size = buf_offset += ret;
485 pd.buf = &buf[offset];
487 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
489 /* guess file format */
490 *fmt = av_probe_input_format2(&pd, 1, &score);
492 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
493 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
495 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
501 return AVERROR_INVALIDDATA;
504 /* rewind. reuse probe buffer to avoid seeking */
505 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
510 /* open input file and probe the format if necessary */
511 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
514 AVProbeData pd = {filename, NULL, 0};
515 int score = AVPROBE_SCORE_RETRY;
518 s->flags |= AVFMT_FLAG_CUSTOM_IO;
520 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
521 else if (s->iformat->flags & AVFMT_NOFILE)
522 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
523 "will be ignored with AVFMT_NOFILE format.\n");
527 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
528 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
531 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
532 &s->interrupt_callback, options)) < 0)
536 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
539 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
540 AVPacketList **plast_pktl){
541 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
546 (*plast_pktl)->next = pktl;
548 *packet_buffer = pktl;
550 /* add the packet in the buffered packet list */
556 void avformat_queue_attached_pictures(AVFormatContext *s)
559 for (i = 0; i < s->nb_streams; i++)
560 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
561 s->streams[i]->discard < AVDISCARD_ALL) {
562 AVPacket copy = s->streams[i]->attached_pic;
563 copy.destruct = NULL;
564 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
568 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
570 AVFormatContext *s = *ps;
572 AVDictionary *tmp = NULL;
573 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
575 if (!s && !(s = avformat_alloc_context()))
576 return AVERROR(ENOMEM);
578 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
579 return AVERROR(EINVAL);
585 av_dict_copy(&tmp, *options, 0);
587 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
590 if ((ret = init_input(s, filename, &tmp)) < 0)
592 avio_skip(s->pb, s->skip_initial_bytes);
594 /* check filename in case an image number is expected */
595 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
596 if (!av_filename_number_test(filename)) {
597 ret = AVERROR(EINVAL);
602 s->duration = s->start_time = AV_NOPTS_VALUE;
603 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
605 /* allocate private data */
606 if (s->iformat->priv_data_size > 0) {
607 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
608 ret = AVERROR(ENOMEM);
611 if (s->iformat->priv_class) {
612 *(const AVClass**)s->priv_data = s->iformat->priv_class;
613 av_opt_set_defaults(s->priv_data);
614 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
619 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
621 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
623 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
624 if ((ret = s->iformat->read_header(s)) < 0)
627 if (id3v2_extra_meta) {
628 if (!strcmp(s->iformat->name, "mp3")) {
629 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
632 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
634 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
636 avformat_queue_attached_pictures(s);
638 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
639 s->data_offset = avio_tell(s->pb);
641 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
644 av_dict_free(options);
651 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
653 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
655 avformat_free_context(s);
660 /*******************************************************/
662 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
664 if(st->request_probe>0){
665 AVProbeData *pd = &st->probe_data;
667 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
671 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
675 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
676 pd->buf_size += pkt->size;
677 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
680 st->probe_packets = 0;
682 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
687 end= s->raw_packet_buffer_remaining_size <= 0
688 || st->probe_packets<=0;
690 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
691 int score= set_codec_from_probe_data(s, st, pd);
692 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
696 st->request_probe= -1;
697 if(st->codec->codec_id != AV_CODEC_ID_NONE){
698 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
700 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
706 static void force_codec_ids(AVFormatContext *s, AVStream *st)
708 switch(st->codec->codec_type){
709 case AVMEDIA_TYPE_VIDEO:
710 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
712 case AVMEDIA_TYPE_AUDIO:
713 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
715 case AVMEDIA_TYPE_SUBTITLE:
716 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
721 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
727 AVPacketList *pktl = s->raw_packet_buffer;
731 st = s->streams[pkt->stream_index];
732 if(st->request_probe <= 0){
733 s->raw_packet_buffer = pktl->next;
734 s->raw_packet_buffer_remaining_size += pkt->size;
743 ret= s->iformat->read_packet(s, pkt);
745 if (!pktl || ret == AVERROR(EAGAIN))
747 for (i = 0; i < s->nb_streams; i++) {
749 if (st->probe_packets) {
750 probe_codec(s, st, NULL);
752 av_assert0(st->request_probe <= 0);
757 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
758 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
759 av_log(s, AV_LOG_WARNING,
760 "Dropped corrupted packet (stream = %d)\n",
766 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
767 av_packet_merge_side_data(pkt);
769 if(pkt->stream_index >= (unsigned)s->nb_streams){
770 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
774 st= s->streams[pkt->stream_index];
775 pkt->dts = wrap_timestamp(st, pkt->dts);
776 pkt->pts = wrap_timestamp(st, pkt->pts);
778 force_codec_ids(s, st);
780 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
781 if (s->use_wallclock_as_timestamps)
782 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
784 if(!pktl && st->request_probe <= 0)
787 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
788 s->raw_packet_buffer_remaining_size -= pkt->size;
790 probe_codec(s, st, pkt);
794 #if FF_API_READ_PACKET
795 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
797 return ff_read_packet(s, pkt);
802 /**********************************************************/
804 static int determinable_frame_size(AVCodecContext *avctx)
806 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
807 avctx->codec_id == AV_CODEC_ID_MP1 ||
808 avctx->codec_id == AV_CODEC_ID_MP2 ||
809 avctx->codec_id == AV_CODEC_ID_MP3/* ||
810 avctx->codec_id == AV_CODEC_ID_CELT*/)
816 * Get the number of samples of an audio frame. Return -1 on error.
818 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
822 /* give frame_size priority if demuxing */
823 if (!mux && enc->frame_size > 1)
824 return enc->frame_size;
826 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
829 /* fallback to using frame_size if muxing */
830 if (enc->frame_size > 1)
831 return enc->frame_size;
838 * Return the frame duration in seconds. Return 0 if not available.
840 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
841 AVCodecParserContext *pc, AVPacket *pkt)
847 switch(st->codec->codec_type) {
848 case AVMEDIA_TYPE_VIDEO:
849 if (st->r_frame_rate.num && !pc) {
850 *pnum = st->r_frame_rate.den;
851 *pden = st->r_frame_rate.num;
852 } else if(st->time_base.num*1000LL > st->time_base.den) {
853 *pnum = st->time_base.num;
854 *pden = st->time_base.den;
855 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
856 *pnum = st->codec->time_base.num;
857 *pden = st->codec->time_base.den;
858 if (pc && pc->repeat_pict) {
859 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
860 *pden /= 1 + pc->repeat_pict;
862 *pnum *= 1 + pc->repeat_pict;
864 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
865 //Thus if we have no parser in such case leave duration undefined.
866 if(st->codec->ticks_per_frame>1 && !pc){
871 case AVMEDIA_TYPE_AUDIO:
872 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
873 if (frame_size <= 0 || st->codec->sample_rate <= 0)
876 *pden = st->codec->sample_rate;
883 static int is_intra_only(AVCodecContext *enc){
884 const AVCodecDescriptor *desc;
886 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
889 desc = av_codec_get_codec_descriptor(enc);
891 desc = avcodec_descriptor_get(enc->codec_id);
892 av_codec_set_codec_descriptor(enc, desc);
895 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
899 static int has_decode_delay_been_guessed(AVStream *st)
901 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
902 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
904 #if CONFIG_H264_DECODER
905 if(st->codec->has_b_frames &&
906 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
909 if(st->codec->has_b_frames<3)
910 return st->nb_decoded_frames >= 7;
911 else if(st->codec->has_b_frames<4)
912 return st->nb_decoded_frames >= 18;
914 return st->nb_decoded_frames >= 20;
917 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
921 if (pktl == s->parse_queue_end)
922 return s->packet_buffer;
926 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index)
928 if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
929 st->pts_wrap_reference == AV_NOPTS_VALUE && st->first_dts != AV_NOPTS_VALUE) {
932 // reference time stamp should be 60 s before first time stamp
933 int64_t pts_wrap_reference = st->first_dts - av_rescale(60, st->time_base.den, st->time_base.num);
934 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
935 int pts_wrap_behavior = (st->first_dts < (1LL<<st->pts_wrap_bits) - (1LL<<st->pts_wrap_bits-3)) ||
936 (st->first_dts < (1LL<<st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
937 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
939 AVProgram *first_program = av_find_program_from_stream(s, NULL, stream_index);
941 if (!first_program) {
942 int default_stream_index = av_find_default_stream_index(s);
943 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
944 for (i=0; i<s->nb_streams; i++) {
945 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
946 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
950 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
951 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
955 AVProgram *program = first_program;
957 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
958 pts_wrap_reference = program->pts_wrap_reference;
959 pts_wrap_behavior = program->pts_wrap_behavior;
962 program = av_find_program_from_stream(s, program, stream_index);
965 // update every program with differing pts_wrap_reference
966 program = first_program;
968 if (program->pts_wrap_reference != pts_wrap_reference) {
969 for (i=0; i<program->nb_stream_indexes; i++) {
970 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
971 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
974 program->pts_wrap_reference = pts_wrap_reference;
975 program->pts_wrap_behavior = pts_wrap_behavior;
977 program = av_find_program_from_stream(s, program, stream_index);
985 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
986 int64_t dts, int64_t pts, AVPacket *pkt)
988 AVStream *st= s->streams[stream_index];
989 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
990 int64_t pts_buffer[MAX_REORDER_DELAY+1];
994 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
997 delay = st->codec->has_b_frames;
998 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
1000 shift = st->first_dts - RELATIVE_TS_BASE;
1002 for (i=0; i<MAX_REORDER_DELAY+1; i++)
1003 pts_buffer[i] = AV_NOPTS_VALUE;
1005 if (is_relative(pts))
1008 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1009 if(pktl->pkt.stream_index != stream_index)
1011 if(is_relative(pktl->pkt.pts))
1012 pktl->pkt.pts += shift;
1014 if(is_relative(pktl->pkt.dts))
1015 pktl->pkt.dts += shift;
1017 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
1018 st->start_time= pktl->pkt.pts;
1020 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1021 pts_buffer[0]= pktl->pkt.pts;
1022 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
1023 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
1024 if(pktl->pkt.dts == AV_NOPTS_VALUE)
1025 pktl->pkt.dts= pts_buffer[0];
1029 if (update_wrap_reference(s, st, stream_index) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
1030 // correct first time stamps to negative values
1031 st->first_dts = wrap_timestamp(st, st->first_dts);
1032 st->cur_dts = wrap_timestamp(st, st->cur_dts);
1033 pkt->dts = wrap_timestamp(st, pkt->dts);
1034 pkt->pts = wrap_timestamp(st, pkt->pts);
1035 pts = wrap_timestamp(st, pts);
1038 if (st->start_time == AV_NOPTS_VALUE)
1039 st->start_time = pts;
1042 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1043 int stream_index, int duration)
1045 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1046 int64_t cur_dts= RELATIVE_TS_BASE;
1048 if(st->first_dts != AV_NOPTS_VALUE){
1049 cur_dts= st->first_dts;
1050 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1051 if(pktl->pkt.stream_index == stream_index){
1052 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
1054 cur_dts -= duration;
1057 if(pktl && pktl->pkt.dts != st->first_dts) {
1058 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in que\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
1062 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
1065 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1066 st->first_dts = cur_dts;
1067 }else if(st->cur_dts != RELATIVE_TS_BASE)
1070 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1071 if(pktl->pkt.stream_index != stream_index)
1073 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
1074 && !pktl->pkt.duration){
1075 pktl->pkt.dts= cur_dts;
1076 if(!st->codec->has_b_frames)
1077 pktl->pkt.pts= cur_dts;
1078 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1079 pktl->pkt.duration = duration;
1082 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1085 st->cur_dts= cur_dts;
1088 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1089 AVCodecParserContext *pc, AVPacket *pkt)
1091 int num, den, presentation_delayed, delay, i;
1094 if (s->flags & AVFMT_FLAG_NOFILLIN)
1097 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1098 pkt->dts= AV_NOPTS_VALUE;
1100 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1101 //FIXME Set low_delay = 0 when has_b_frames = 1
1102 st->codec->has_b_frames = 1;
1104 /* do we have a video B-frame ? */
1105 delay= st->codec->has_b_frames;
1106 presentation_delayed = 0;
1108 /* XXX: need has_b_frame, but cannot get it if the codec is
1111 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1112 presentation_delayed = 1;
1114 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && st->pts_wrap_bits<63 && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts){
1115 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1116 pkt->dts -= 1LL<<st->pts_wrap_bits;
1118 pkt->pts += 1LL<<st->pts_wrap_bits;
1121 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1122 // we take the conservative approach and discard both
1123 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1124 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1125 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1126 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1127 pkt->dts= AV_NOPTS_VALUE;
1130 if (pkt->duration == 0) {
1131 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1133 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1136 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1137 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1139 /* correct timestamps with byte offset if demuxers only have timestamps
1140 on packet boundaries */
1141 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1142 /* this will estimate bitrate based on this frame's duration and size */
1143 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1144 if(pkt->pts != AV_NOPTS_VALUE)
1146 if(pkt->dts != AV_NOPTS_VALUE)
1150 if (pc && pc->dts_sync_point >= 0) {
1151 // we have synchronization info from the parser
1152 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1154 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1155 if (pkt->dts != AV_NOPTS_VALUE) {
1156 // got DTS from the stream, update reference timestamp
1157 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1158 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1159 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1160 // compute DTS based on reference timestamp
1161 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1162 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1164 if (pc->dts_sync_point > 0)
1165 st->reference_dts = pkt->dts; // new reference
1169 /* This may be redundant, but it should not hurt. */
1170 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1171 presentation_delayed = 1;
1173 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1174 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1175 /* interpolate PTS and DTS if they are not present */
1176 //We skip H264 currently because delay and has_b_frames are not reliably set
1177 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1178 if (presentation_delayed) {
1179 /* DTS = decompression timestamp */
1180 /* PTS = presentation timestamp */
1181 if (pkt->dts == AV_NOPTS_VALUE)
1182 pkt->dts = st->last_IP_pts;
1183 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1184 if (pkt->dts == AV_NOPTS_VALUE)
1185 pkt->dts = st->cur_dts;
1187 /* this is tricky: the dts must be incremented by the duration
1188 of the frame we are displaying, i.e. the last I- or P-frame */
1189 if (st->last_IP_duration == 0)
1190 st->last_IP_duration = pkt->duration;
1191 if(pkt->dts != AV_NOPTS_VALUE)
1192 st->cur_dts = pkt->dts + st->last_IP_duration;
1193 st->last_IP_duration = pkt->duration;
1194 st->last_IP_pts= pkt->pts;
1195 /* cannot compute PTS if not present (we can compute it only
1196 by knowing the future */
1197 } else if (pkt->pts != AV_NOPTS_VALUE ||
1198 pkt->dts != AV_NOPTS_VALUE ||
1200 int duration = pkt->duration;
1202 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1203 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1204 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1205 if( old_diff < new_diff && old_diff < (duration>>3)
1206 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1207 && (!strcmp(s->iformat->name, "mpeg") ||
1208 !strcmp(s->iformat->name, "mpegts"))){
1209 pkt->pts += duration;
1210 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1211 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1212 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1216 /* presentation is not delayed : PTS and DTS are the same */
1217 if (pkt->pts == AV_NOPTS_VALUE)
1218 pkt->pts = pkt->dts;
1219 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1221 if (pkt->pts == AV_NOPTS_VALUE)
1222 pkt->pts = st->cur_dts;
1223 pkt->dts = pkt->pts;
1224 if (pkt->pts != AV_NOPTS_VALUE)
1225 st->cur_dts = pkt->pts + duration;
1229 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1230 st->pts_buffer[0]= pkt->pts;
1231 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1232 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1233 if(pkt->dts == AV_NOPTS_VALUE)
1234 pkt->dts= st->pts_buffer[0];
1236 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1237 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); // this should happen on the first packet
1239 if(pkt->dts > st->cur_dts)
1240 st->cur_dts = pkt->dts;
1242 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1243 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1246 if (is_intra_only(st->codec))
1247 pkt->flags |= AV_PKT_FLAG_KEY;
1249 pkt->convergence_duration = pc->convergence_duration;
1252 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1255 AVPacketList *pktl = *pkt_buf;
1256 *pkt_buf = pktl->next;
1257 av_free_packet(&pktl->pkt);
1260 *pkt_buf_end = NULL;
1264 * Parse a packet, add all split parts to parse_queue
1266 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1268 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1270 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1271 AVStream *st = s->streams[stream_index];
1272 uint8_t *data = pkt ? pkt->data : NULL;
1273 int size = pkt ? pkt->size : 0;
1274 int ret = 0, got_output = 0;
1277 av_init_packet(&flush_pkt);
1280 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1281 // preserve 0-size sync packets
1282 compute_pkt_fields(s, st, st->parser, pkt);
1285 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1288 av_init_packet(&out_pkt);
1289 len = av_parser_parse2(st->parser, st->codec,
1290 &out_pkt.data, &out_pkt.size, data, size,
1291 pkt->pts, pkt->dts, pkt->pos);
1293 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1295 /* increment read pointer */
1299 got_output = !!out_pkt.size;
1304 /* set the duration */
1305 out_pkt.duration = 0;
1306 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1307 if (st->codec->sample_rate > 0) {
1308 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1309 (AVRational){ 1, st->codec->sample_rate },
1313 } else if (st->codec->time_base.num != 0 &&
1314 st->codec->time_base.den != 0) {
1315 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1316 st->codec->time_base,
1321 out_pkt.stream_index = st->index;
1322 out_pkt.pts = st->parser->pts;
1323 out_pkt.dts = st->parser->dts;
1324 out_pkt.pos = st->parser->pos;
1326 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1327 out_pkt.pos = st->parser->frame_offset;
1329 if (st->parser->key_frame == 1 ||
1330 (st->parser->key_frame == -1 &&
1331 st->parser->pict_type == AV_PICTURE_TYPE_I))
1332 out_pkt.flags |= AV_PKT_FLAG_KEY;
1334 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1335 out_pkt.flags |= AV_PKT_FLAG_KEY;
1337 compute_pkt_fields(s, st, st->parser, &out_pkt);
1339 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1340 out_pkt.destruct = pkt->destruct;
1341 pkt->destruct = NULL;
1343 if ((ret = av_dup_packet(&out_pkt)) < 0)
1346 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1347 av_free_packet(&out_pkt);
1348 ret = AVERROR(ENOMEM);
1354 /* end of the stream => close and free the parser */
1355 if (pkt == &flush_pkt) {
1356 av_parser_close(st->parser);
1361 av_free_packet(pkt);
1365 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1366 AVPacketList **pkt_buffer_end,
1370 av_assert0(*pkt_buffer);
1373 *pkt_buffer = pktl->next;
1375 *pkt_buffer_end = NULL;
1380 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1382 int ret = 0, i, got_packet = 0;
1384 av_init_packet(pkt);
1386 while (!got_packet && !s->parse_queue) {
1390 /* read next packet */
1391 ret = ff_read_packet(s, &cur_pkt);
1393 if (ret == AVERROR(EAGAIN))
1395 /* flush the parsers */
1396 for(i = 0; i < s->nb_streams; i++) {
1398 if (st->parser && st->need_parsing)
1399 parse_packet(s, NULL, st->index);
1401 /* all remaining packets are now in parse_queue =>
1402 * really terminate parsing */
1406 st = s->streams[cur_pkt.stream_index];
1408 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1409 cur_pkt.dts != AV_NOPTS_VALUE &&
1410 cur_pkt.pts < cur_pkt.dts) {
1411 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1412 cur_pkt.stream_index,
1413 av_ts2str(cur_pkt.pts),
1414 av_ts2str(cur_pkt.dts),
1417 if (s->debug & FF_FDEBUG_TS)
1418 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1419 cur_pkt.stream_index,
1420 av_ts2str(cur_pkt.pts),
1421 av_ts2str(cur_pkt.dts),
1426 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1427 st->parser = av_parser_init(st->codec->codec_id);
1429 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1430 "%s, packets or times may be invalid.\n",
1431 avcodec_get_name(st->codec->codec_id));
1432 /* no parser available: just output the raw packets */
1433 st->need_parsing = AVSTREAM_PARSE_NONE;
1434 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1435 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1436 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1437 st->parser->flags |= PARSER_FLAG_ONCE;
1438 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1439 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1443 if (!st->need_parsing || !st->parser) {
1444 /* no parsing needed: we just output the packet as is */
1446 compute_pkt_fields(s, st, NULL, pkt);
1447 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1448 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1449 ff_reduce_index(s, st->index);
1450 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1453 } else if (st->discard < AVDISCARD_ALL) {
1454 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1458 av_free_packet(&cur_pkt);
1460 if (pkt->flags & AV_PKT_FLAG_KEY)
1461 st->skip_to_keyframe = 0;
1462 if (st->skip_to_keyframe) {
1463 av_free_packet(&cur_pkt);
1468 if (!got_packet && s->parse_queue)
1469 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1471 if(s->debug & FF_FDEBUG_TS)
1472 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1474 av_ts2str(pkt->pts),
1475 av_ts2str(pkt->dts),
1483 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1485 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1491 ret = s->packet_buffer ?
1492 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1493 read_frame_internal(s, pkt);
1500 AVPacketList *pktl = s->packet_buffer;
1503 AVPacket *next_pkt = &pktl->pkt;
1505 if (next_pkt->dts != AV_NOPTS_VALUE) {
1506 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1507 // last dts seen for this stream. if any of packets following
1508 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1509 int64_t last_dts = next_pkt->dts;
1510 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1511 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1512 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1513 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1514 next_pkt->pts = pktl->pkt.dts;
1516 if (last_dts != AV_NOPTS_VALUE) {
1517 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1518 last_dts = pktl->pkt.dts;
1523 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1524 // Fixing the last reference frame had none pts issue (For MXF etc).
1525 // We only do this when
1527 // 2. we are not able to resolve a pts value for current packet.
1528 // 3. the packets for this stream at the end of the files had valid dts.
1529 next_pkt->pts = last_dts + next_pkt->duration;
1531 pktl = s->packet_buffer;
1534 /* read packet from packet buffer, if there is data */
1535 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1536 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1537 ret = read_from_packet_buffer(&s->packet_buffer,
1538 &s->packet_buffer_end, pkt);
1543 ret = read_frame_internal(s, pkt);
1545 if (pktl && ret != AVERROR(EAGAIN)) {
1552 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1553 &s->packet_buffer_end)) < 0)
1554 return AVERROR(ENOMEM);
1559 st = s->streams[pkt->stream_index];
1560 if (st->skip_samples) {
1561 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1562 AV_WL32(p, st->skip_samples);
1563 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1564 st->skip_samples = 0;
1567 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1568 ff_reduce_index(s, st->index);
1569 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1572 if (is_relative(pkt->dts))
1573 pkt->dts -= RELATIVE_TS_BASE;
1574 if (is_relative(pkt->pts))
1575 pkt->pts -= RELATIVE_TS_BASE;
1580 /* XXX: suppress the packet queue */
1581 static void flush_packet_queue(AVFormatContext *s)
1583 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1584 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1585 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1587 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1590 /*******************************************************/
1593 int av_find_default_stream_index(AVFormatContext *s)
1595 int first_audio_index = -1;
1599 if (s->nb_streams <= 0)
1601 for(i = 0; i < s->nb_streams; i++) {
1603 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1604 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1607 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1608 first_audio_index = i;
1610 return first_audio_index >= 0 ? first_audio_index : 0;
1614 * Flush the frame reader.
1616 void ff_read_frame_flush(AVFormatContext *s)
1621 flush_packet_queue(s);
1623 /* for each stream, reset read state */
1624 for(i = 0; i < s->nb_streams; i++) {
1628 av_parser_close(st->parser);
1631 st->last_IP_pts = AV_NOPTS_VALUE;
1632 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1633 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1634 st->reference_dts = AV_NOPTS_VALUE;
1636 st->probe_packets = MAX_PROBE_PACKETS;
1638 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1639 st->pts_buffer[j]= AV_NOPTS_VALUE;
1643 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1647 for(i = 0; i < s->nb_streams; i++) {
1648 AVStream *st = s->streams[i];
1650 st->cur_dts = av_rescale(timestamp,
1651 st->time_base.den * (int64_t)ref_st->time_base.num,
1652 st->time_base.num * (int64_t)ref_st->time_base.den);
1656 void ff_reduce_index(AVFormatContext *s, int stream_index)
1658 AVStream *st= s->streams[stream_index];
1659 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1661 if((unsigned)st->nb_index_entries >= max_entries){
1663 for(i=0; 2*i<st->nb_index_entries; i++)
1664 st->index_entries[i]= st->index_entries[2*i];
1665 st->nb_index_entries= i;
1669 int ff_add_index_entry(AVIndexEntry **index_entries,
1670 int *nb_index_entries,
1671 unsigned int *index_entries_allocated_size,
1672 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1674 AVIndexEntry *entries, *ie;
1677 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1680 if(timestamp == AV_NOPTS_VALUE)
1681 return AVERROR(EINVAL);
1683 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1684 timestamp -= RELATIVE_TS_BASE;
1686 entries = av_fast_realloc(*index_entries,
1687 index_entries_allocated_size,
1688 (*nb_index_entries + 1) *
1689 sizeof(AVIndexEntry));
1693 *index_entries= entries;
1695 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1698 index= (*nb_index_entries)++;
1699 ie= &entries[index];
1700 assert(index==0 || ie[-1].timestamp < timestamp);
1702 ie= &entries[index];
1703 if(ie->timestamp != timestamp){
1704 if(ie->timestamp <= timestamp)
1706 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1707 (*nb_index_entries)++;
1708 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1709 distance= ie->min_distance;
1713 ie->timestamp = timestamp;
1714 ie->min_distance= distance;
1721 int av_add_index_entry(AVStream *st,
1722 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1724 timestamp = wrap_timestamp(st, timestamp);
1725 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1726 &st->index_entries_allocated_size, pos,
1727 timestamp, size, distance, flags);
1730 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1731 int64_t wanted_timestamp, int flags)
1739 //optimize appending index entries at the end
1740 if(b && entries[b-1].timestamp < wanted_timestamp)
1745 timestamp = entries[m].timestamp;
1746 if(timestamp >= wanted_timestamp)
1748 if(timestamp <= wanted_timestamp)
1751 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1753 if(!(flags & AVSEEK_FLAG_ANY)){
1754 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1755 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1764 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1767 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1768 wanted_timestamp, flags);
1771 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1772 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1774 return wrap_timestamp(s->streams[stream_index], read_timestamp(s, stream_index, ppos, pos_limit));
1777 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1779 AVInputFormat *avif= s->iformat;
1780 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1781 int64_t ts_min, ts_max, ts;
1786 if (stream_index < 0)
1789 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1792 ts_min= AV_NOPTS_VALUE;
1793 pos_limit= -1; //gcc falsely says it may be uninitialized
1795 st= s->streams[stream_index];
1796 if(st->index_entries){
1799 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()
1800 index= FFMAX(index, 0);
1801 e= &st->index_entries[index];
1803 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1805 ts_min= e->timestamp;
1806 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1807 pos_min, av_ts2str(ts_min));
1812 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1813 assert(index < st->nb_index_entries);
1815 e= &st->index_entries[index];
1816 assert(e->timestamp >= target_ts);
1818 ts_max= e->timestamp;
1819 pos_limit= pos_max - e->min_distance;
1820 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1821 pos_max, pos_limit, av_ts2str(ts_max));
1825 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1830 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1833 ff_read_frame_flush(s);
1834 ff_update_cur_dts(s, st, ts);
1839 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1840 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1841 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1842 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1845 int64_t start_pos, filesize;
1848 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1850 if(ts_min == AV_NOPTS_VALUE){
1851 pos_min = s->data_offset;
1852 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1853 if (ts_min == AV_NOPTS_VALUE)
1857 if(ts_min >= target_ts){
1862 if(ts_max == AV_NOPTS_VALUE){
1864 filesize = avio_size(s->pb);
1865 pos_max = filesize - 1;
1868 ts_max = ff_read_timestamp(s, stream_index, &pos_max, pos_max + step, read_timestamp);
1870 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1871 if (ts_max == AV_NOPTS_VALUE)
1875 int64_t tmp_pos= pos_max + 1;
1876 int64_t tmp_ts= ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
1877 if(tmp_ts == AV_NOPTS_VALUE)
1881 if(tmp_pos >= filesize)
1887 if(ts_max <= target_ts){
1892 if(ts_min > ts_max){
1894 }else if(ts_min == ts_max){
1899 while (pos_min < pos_limit) {
1900 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1901 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1902 assert(pos_limit <= pos_max);
1905 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1906 // interpolate position (better than dichotomy)
1907 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1908 + pos_min - approximate_keyframe_distance;
1909 }else if(no_change==1){
1910 // bisection, if interpolation failed to change min or max pos last time
1911 pos = (pos_min + pos_limit)>>1;
1913 /* linear search if bisection failed, can only happen if there
1914 are very few or no keyframes between min/max */
1919 else if(pos > pos_limit)
1923 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); //may pass pos_limit instead of -1
1928 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1929 pos_min, pos, pos_max,
1930 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1931 pos_limit, start_pos, no_change);
1932 if(ts == AV_NOPTS_VALUE){
1933 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1936 assert(ts != AV_NOPTS_VALUE);
1937 if (target_ts <= ts) {
1938 pos_limit = start_pos - 1;
1942 if (target_ts >= ts) {
1948 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1949 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1952 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1954 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1955 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1956 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1962 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1963 int64_t pos_min, pos_max;
1965 pos_min = s->data_offset;
1966 pos_max = avio_size(s->pb) - 1;
1968 if (pos < pos_min) pos= pos_min;
1969 else if(pos > pos_max) pos= pos_max;
1971 avio_seek(s->pb, pos, SEEK_SET);
1976 static int seek_frame_generic(AVFormatContext *s,
1977 int stream_index, int64_t timestamp, int flags)
1984 st = s->streams[stream_index];
1986 index = av_index_search_timestamp(st, timestamp, flags);
1988 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1991 if(index < 0 || index==st->nb_index_entries-1){
1995 if(st->nb_index_entries){
1996 assert(st->index_entries);
1997 ie= &st->index_entries[st->nb_index_entries-1];
1998 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2000 ff_update_cur_dts(s, st, ie->timestamp);
2002 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
2008 read_status = av_read_frame(s, &pkt);
2009 } while (read_status == AVERROR(EAGAIN));
2010 if (read_status < 0)
2012 av_free_packet(&pkt);
2013 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
2014 if(pkt.flags & AV_PKT_FLAG_KEY)
2016 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
2017 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);
2022 index = av_index_search_timestamp(st, timestamp, flags);
2027 ff_read_frame_flush(s);
2028 if (s->iformat->read_seek){
2029 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2032 ie = &st->index_entries[index];
2033 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2035 ff_update_cur_dts(s, st, ie->timestamp);
2040 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2041 int64_t timestamp, int flags)
2046 if (flags & AVSEEK_FLAG_BYTE) {
2047 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2049 ff_read_frame_flush(s);
2050 return seek_frame_byte(s, stream_index, timestamp, flags);
2053 if(stream_index < 0){
2054 stream_index= av_find_default_stream_index(s);
2055 if(stream_index < 0)
2058 st= s->streams[stream_index];
2059 /* timestamp for default must be expressed in AV_TIME_BASE units */
2060 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
2063 /* first, we try the format specific seek */
2064 if (s->iformat->read_seek) {
2065 ff_read_frame_flush(s);
2066 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2073 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2074 ff_read_frame_flush(s);
2075 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2076 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2077 ff_read_frame_flush(s);
2078 return seek_frame_generic(s, stream_index, timestamp, flags);
2084 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2086 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
2089 avformat_queue_attached_pictures(s);
2094 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
2096 if(min_ts > ts || max_ts < ts)
2099 if (s->iformat->read_seek2) {
2101 ff_read_frame_flush(s);
2102 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2105 avformat_queue_attached_pictures(s);
2109 if(s->iformat->read_timestamp){
2110 //try to seek via read_timestamp()
2113 //Fallback to old API if new is not implemented but old is
2114 //Note the old has somewhat different semantics
2115 if (s->iformat->read_seek || 1) {
2116 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2117 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2118 if (ret<0 && ts != min_ts && max_ts != ts) {
2119 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2121 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2126 // try some generic seek like seek_frame_generic() but with new ts semantics
2129 /*******************************************************/
2132 * Return TRUE if the stream has accurate duration in any stream.
2134 * @return TRUE if the stream has accurate duration for at least one component.
2136 static int has_duration(AVFormatContext *ic)
2141 for(i = 0;i < ic->nb_streams; i++) {
2142 st = ic->streams[i];
2143 if (st->duration != AV_NOPTS_VALUE)
2146 if (ic->duration != AV_NOPTS_VALUE)
2152 * Estimate the stream timings from the one of each components.
2154 * Also computes the global bitrate if possible.
2156 static void update_stream_timings(AVFormatContext *ic)
2158 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2159 int64_t duration, duration1, filesize;
2164 start_time = INT64_MAX;
2165 start_time_text = INT64_MAX;
2166 end_time = INT64_MIN;
2167 duration = INT64_MIN;
2168 for(i = 0;i < ic->nb_streams; i++) {
2169 st = ic->streams[i];
2170 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2171 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2172 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2173 if (start_time1 < start_time_text)
2174 start_time_text = start_time1;
2176 start_time = FFMIN(start_time, start_time1);
2177 end_time1 = AV_NOPTS_VALUE;
2178 if (st->duration != AV_NOPTS_VALUE) {
2179 end_time1 = start_time1
2180 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2181 end_time = FFMAX(end_time, end_time1);
2183 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2184 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2185 p->start_time = start_time1;
2186 if(p->end_time < end_time1)
2187 p->end_time = end_time1;
2190 if (st->duration != AV_NOPTS_VALUE) {
2191 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2192 duration = FFMAX(duration, duration1);
2195 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2196 start_time = start_time_text;
2197 else if(start_time > start_time_text)
2198 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2200 if (start_time != INT64_MAX) {
2201 ic->start_time = start_time;
2202 if (end_time != INT64_MIN) {
2203 if (ic->nb_programs) {
2204 for (i=0; i<ic->nb_programs; i++) {
2205 p = ic->programs[i];
2206 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2207 duration = FFMAX(duration, p->end_time - p->start_time);
2210 duration = FFMAX(duration, end_time - start_time);
2213 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2214 ic->duration = duration;
2216 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2217 /* compute the bitrate */
2218 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2219 (double)ic->duration;
2223 static void fill_all_stream_timings(AVFormatContext *ic)
2228 update_stream_timings(ic);
2229 for(i = 0;i < ic->nb_streams; i++) {
2230 st = ic->streams[i];
2231 if (st->start_time == AV_NOPTS_VALUE) {
2232 if(ic->start_time != AV_NOPTS_VALUE)
2233 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2234 if(ic->duration != AV_NOPTS_VALUE)
2235 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2240 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2242 int64_t filesize, duration;
2246 /* if bit_rate is already set, we believe it */
2247 if (ic->bit_rate <= 0) {
2249 for(i=0;i<ic->nb_streams;i++) {
2250 st = ic->streams[i];
2251 if (st->codec->bit_rate > 0)
2252 bit_rate += st->codec->bit_rate;
2254 ic->bit_rate = bit_rate;
2257 /* if duration is already set, we believe it */
2258 if (ic->duration == AV_NOPTS_VALUE &&
2259 ic->bit_rate != 0) {
2260 filesize = ic->pb ? avio_size(ic->pb) : 0;
2262 for(i = 0; i < ic->nb_streams; i++) {
2263 st = ic->streams[i];
2264 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2265 if (st->duration == AV_NOPTS_VALUE)
2266 st->duration = duration;
2272 #define DURATION_MAX_READ_SIZE 250000LL
2273 #define DURATION_MAX_RETRY 4
2275 /* only usable for MPEG-PS streams */
2276 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2278 AVPacket pkt1, *pkt = &pkt1;
2280 int read_size, i, ret;
2282 int64_t filesize, offset, duration;
2285 /* flush packet queue */
2286 flush_packet_queue(ic);
2288 for (i=0; i<ic->nb_streams; i++) {
2289 st = ic->streams[i];
2290 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2291 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2294 av_parser_close(st->parser);
2299 /* estimate the end time (duration) */
2300 /* XXX: may need to support wrapping */
2301 filesize = ic->pb ? avio_size(ic->pb) : 0;
2302 end_time = AV_NOPTS_VALUE;
2304 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2308 avio_seek(ic->pb, offset, SEEK_SET);
2311 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2315 ret = ff_read_packet(ic, pkt);
2316 } while(ret == AVERROR(EAGAIN));
2319 read_size += pkt->size;
2320 st = ic->streams[pkt->stream_index];
2321 if (pkt->pts != AV_NOPTS_VALUE &&
2322 (st->start_time != AV_NOPTS_VALUE ||
2323 st->first_dts != AV_NOPTS_VALUE)) {
2324 duration = end_time = pkt->pts;
2325 if (st->start_time != AV_NOPTS_VALUE)
2326 duration -= st->start_time;
2328 duration -= st->first_dts;
2330 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2331 st->duration = duration;
2334 av_free_packet(pkt);
2336 }while( end_time==AV_NOPTS_VALUE
2337 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2338 && ++retry <= DURATION_MAX_RETRY);
2340 fill_all_stream_timings(ic);
2342 avio_seek(ic->pb, old_offset, SEEK_SET);
2343 for (i=0; i<ic->nb_streams; i++) {
2345 st->cur_dts= st->first_dts;
2346 st->last_IP_pts = AV_NOPTS_VALUE;
2347 st->reference_dts = AV_NOPTS_VALUE;
2351 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2355 /* get the file size, if possible */
2356 if (ic->iformat->flags & AVFMT_NOFILE) {
2359 file_size = avio_size(ic->pb);
2360 file_size = FFMAX(0, file_size);
2363 if ((!strcmp(ic->iformat->name, "mpeg") ||
2364 !strcmp(ic->iformat->name, "mpegts")) &&
2365 file_size && ic->pb->seekable) {
2366 /* get accurate estimate from the PTSes */
2367 estimate_timings_from_pts(ic, old_offset);
2368 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2369 } else if (has_duration(ic)) {
2370 /* at least one component has timings - we use them for all
2372 fill_all_stream_timings(ic);
2373 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2375 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2376 /* less precise: use bitrate info */
2377 estimate_timings_from_bit_rate(ic);
2378 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2380 update_stream_timings(ic);
2384 AVStream av_unused *st;
2385 for(i = 0;i < ic->nb_streams; i++) {
2386 st = ic->streams[i];
2387 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2388 (double) st->start_time / AV_TIME_BASE,
2389 (double) st->duration / AV_TIME_BASE);
2391 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2392 (double) ic->start_time / AV_TIME_BASE,
2393 (double) ic->duration / AV_TIME_BASE,
2394 ic->bit_rate / 1000);
2398 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2400 AVCodecContext *avctx = st->codec;
2402 #define FAIL(errmsg) do { \
2404 *errmsg_ptr = errmsg; \
2408 switch (avctx->codec_type) {
2409 case AVMEDIA_TYPE_AUDIO:
2410 if (!avctx->frame_size && determinable_frame_size(avctx))
2411 FAIL("unspecified frame size");
2412 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2413 FAIL("unspecified sample format");
2414 if (!avctx->sample_rate)
2415 FAIL("unspecified sample rate");
2416 if (!avctx->channels)
2417 FAIL("unspecified number of channels");
2418 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2419 FAIL("no decodable DTS frames");
2421 case AVMEDIA_TYPE_VIDEO:
2423 FAIL("unspecified size");
2424 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2425 FAIL("unspecified pixel format");
2427 case AVMEDIA_TYPE_SUBTITLE:
2428 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2429 FAIL("unspecified size");
2431 case AVMEDIA_TYPE_DATA:
2432 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2435 if (avctx->codec_id == AV_CODEC_ID_NONE)
2436 FAIL("unknown codec");
2440 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2441 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2443 const AVCodec *codec;
2444 int got_picture = 1, ret = 0;
2445 AVFrame *frame = avcodec_alloc_frame();
2446 AVSubtitle subtitle;
2447 AVPacket pkt = *avpkt;
2450 return AVERROR(ENOMEM);
2452 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2453 AVDictionary *thread_opt = NULL;
2455 codec = st->codec->codec ? st->codec->codec :
2456 avcodec_find_decoder(st->codec->codec_id);
2459 st->info->found_decoder = -1;
2464 /* force thread count to 1 since the h264 decoder will not extract SPS
2465 * and PPS to extradata during multi-threaded decoding */
2466 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2467 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2469 av_dict_free(&thread_opt);
2471 st->info->found_decoder = -1;
2474 st->info->found_decoder = 1;
2475 } else if (!st->info->found_decoder)
2476 st->info->found_decoder = 1;
2478 if (st->info->found_decoder < 0) {
2483 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2485 (!has_codec_parameters(st, NULL) ||
2486 !has_decode_delay_been_guessed(st) ||
2487 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2489 avcodec_get_frame_defaults(frame);
2490 switch(st->codec->codec_type) {
2491 case AVMEDIA_TYPE_VIDEO:
2492 ret = avcodec_decode_video2(st->codec, frame,
2493 &got_picture, &pkt);
2495 case AVMEDIA_TYPE_AUDIO:
2496 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2498 case AVMEDIA_TYPE_SUBTITLE:
2499 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2500 &got_picture, &pkt);
2508 st->nb_decoded_frames++;
2515 if(!pkt.data && !got_picture)
2519 avcodec_free_frame(&frame);
2523 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2525 while (tags->id != AV_CODEC_ID_NONE) {
2533 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2536 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2537 if(tag == tags[i].tag)
2540 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2541 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2544 return AV_CODEC_ID_NONE;
2547 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2551 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2552 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2553 default: return AV_CODEC_ID_NONE;
2558 if (sflags & (1 << (bps - 1))) {
2560 case 1: return AV_CODEC_ID_PCM_S8;
2561 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2562 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2563 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2564 default: return AV_CODEC_ID_NONE;
2568 case 1: return AV_CODEC_ID_PCM_U8;
2569 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2570 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2571 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2572 default: return AV_CODEC_ID_NONE;
2578 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2581 for(i=0; tags && tags[i]; i++){
2582 int tag= ff_codec_get_tag(tags[i], id);
2588 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2591 for(i=0; tags && tags[i]; i++){
2592 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2593 if(id!=AV_CODEC_ID_NONE) return id;
2595 return AV_CODEC_ID_NONE;
2598 static void compute_chapters_end(AVFormatContext *s)
2601 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2603 for (i = 0; i < s->nb_chapters; i++)
2604 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2605 AVChapter *ch = s->chapters[i];
2606 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2609 for (j = 0; j < s->nb_chapters; j++) {
2610 AVChapter *ch1 = s->chapters[j];
2611 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2612 if (j != i && next_start > ch->start && next_start < end)
2615 ch->end = (end == INT64_MAX) ? ch->start : end;
2619 static int get_std_framerate(int i){
2620 if(i<60*12) return (i+1)*1001;
2621 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2625 * Is the time base unreliable.
2626 * This is a heuristic to balance between quick acceptance of the values in
2627 * the headers vs. some extra checks.
2628 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2629 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2630 * And there are "variable" fps files this needs to detect as well.
2632 static int tb_unreliable(AVCodecContext *c){
2633 if( c->time_base.den >= 101L*c->time_base.num
2634 || c->time_base.den < 5L*c->time_base.num
2635 /* || c->codec_tag == AV_RL32("DIVX")
2636 || c->codec_tag == AV_RL32("XVID")*/
2637 || c->codec_tag == AV_RL32("mp4v")
2638 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2639 || c->codec_id == AV_CODEC_ID_H264
2645 #if FF_API_FORMAT_PARAMETERS
2646 int av_find_stream_info(AVFormatContext *ic)
2648 return avformat_find_stream_info(ic, NULL);
2652 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2654 int i, count, ret, read_size, j;
2656 AVPacket pkt1, *pkt;
2657 int64_t old_offset = avio_tell(ic->pb);
2658 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2659 int flush_codecs = ic->probesize > 0;
2662 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2664 for(i=0;i<ic->nb_streams;i++) {
2665 const AVCodec *codec;
2666 AVDictionary *thread_opt = NULL;
2667 st = ic->streams[i];
2669 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2670 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2671 /* if(!st->time_base.num)
2673 if(!st->codec->time_base.num)
2674 st->codec->time_base= st->time_base;
2676 //only for the split stuff
2677 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2678 st->parser = av_parser_init(st->codec->codec_id);
2680 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2681 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2682 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2683 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2685 } else if (st->need_parsing) {
2686 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2687 "%s, packets or times may be invalid.\n",
2688 avcodec_get_name(st->codec->codec_id));
2691 codec = st->codec->codec ? st->codec->codec :
2692 avcodec_find_decoder(st->codec->codec_id);
2694 /* force thread count to 1 since the h264 decoder will not extract SPS
2695 * and PPS to extradata during multi-threaded decoding */
2696 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2698 /* Ensure that subtitle_header is properly set. */
2699 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2700 && codec && !st->codec->codec)
2701 avcodec_open2(st->codec, codec, options ? &options[i]
2704 //try to just open decoders, in case this is enough to get parameters
2705 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2706 if (codec && !st->codec->codec)
2707 avcodec_open2(st->codec, codec, options ? &options[i]
2711 av_dict_free(&thread_opt);
2714 for (i=0; i<ic->nb_streams; i++) {
2715 #if FF_API_R_FRAME_RATE
2716 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2718 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2719 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2725 if (ff_check_interrupt(&ic->interrupt_callback)){
2727 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2731 /* check if one codec still needs to be handled */
2732 for(i=0;i<ic->nb_streams;i++) {
2733 int fps_analyze_framecount = 20;
2735 st = ic->streams[i];
2736 if (!has_codec_parameters(st, NULL))
2738 /* if the timebase is coarse (like the usual millisecond precision
2739 of mkv), we need to analyze more frames to reliably arrive at
2741 if (av_q2d(st->time_base) > 0.0005)
2742 fps_analyze_framecount *= 2;
2743 if (ic->fps_probe_size >= 0)
2744 fps_analyze_framecount = ic->fps_probe_size;
2745 /* variable fps and no guess at the real fps */
2746 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2747 && st->info->duration_count < fps_analyze_framecount
2748 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2750 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2752 if (st->first_dts == AV_NOPTS_VALUE &&
2753 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2754 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2757 if (i == ic->nb_streams) {
2758 /* NOTE: if the format has no header, then we need to read
2759 some packets to get most of the streams, so we cannot
2761 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2762 /* if we found the info for all the codecs, we can stop */
2764 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2769 /* we did not get all the codec info, but we read too much data */
2770 if (read_size >= ic->probesize) {
2772 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2773 for (i = 0; i < ic->nb_streams; i++)
2774 if (!ic->streams[i]->r_frame_rate.num &&
2775 ic->streams[i]->info->duration_count <= 1)
2776 av_log(ic, AV_LOG_WARNING,
2777 "Stream #%d: not enough frames to estimate rate; "
2778 "consider increasing probesize\n", i);
2782 /* NOTE: a new stream can be added there if no header in file
2783 (AVFMTCTX_NOHEADER) */
2784 ret = read_frame_internal(ic, &pkt1);
2785 if (ret == AVERROR(EAGAIN))
2793 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2796 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2797 &ic->packet_buffer_end);
2798 if ((ret = av_dup_packet(pkt)) < 0)
2799 goto find_stream_info_err;
2802 read_size += pkt->size;
2804 st = ic->streams[pkt->stream_index];
2805 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2806 /* check for non-increasing dts */
2807 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2808 st->info->fps_last_dts >= pkt->dts) {
2809 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2810 "packet %d with DTS %"PRId64", packet %d with DTS "
2811 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2812 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2813 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2815 /* check for a discontinuity in dts - if the difference in dts
2816 * is more than 1000 times the average packet duration in the sequence,
2817 * we treat it as a discontinuity */
2818 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2819 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2820 (pkt->dts - st->info->fps_last_dts) / 1000 >
2821 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2822 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2823 "packet %d with DTS %"PRId64", packet %d with DTS "
2824 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2825 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2826 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2829 /* update stored dts values */
2830 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2831 st->info->fps_first_dts = pkt->dts;
2832 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2834 st->info->fps_last_dts = pkt->dts;
2835 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2837 if (st->codec_info_nb_frames>1) {
2839 if (st->time_base.den > 0)
2840 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2841 if (st->avg_frame_rate.num > 0)
2842 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2844 if (t >= ic->max_analyze_duration) {
2845 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2848 if (pkt->duration) {
2849 st->info->codec_info_duration += pkt->duration;
2850 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2853 #if FF_API_R_FRAME_RATE
2855 int64_t last = st->info->last_dts;
2857 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2858 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2859 int64_t duration= pkt->dts - last;
2861 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2862 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2863 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2864 int framerate= get_std_framerate(i);
2865 double sdts= dts*framerate/(1001*12);
2867 int64_t ticks= llrint(sdts+j*0.5);
2868 double error= sdts - ticks + j*0.5;
2869 st->info->duration_error[j][0][i] += error;
2870 st->info->duration_error[j][1][i] += error*error;
2873 st->info->duration_count++;
2874 // ignore the first 4 values, they might have some random jitter
2875 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2876 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2878 if (pkt->dts != AV_NOPTS_VALUE)
2879 st->info->last_dts = pkt->dts;
2882 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2883 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2884 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2885 st->codec->extradata_size= i;
2886 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2887 if (!st->codec->extradata)
2888 return AVERROR(ENOMEM);
2889 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2890 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2894 /* if still no information, we try to open the codec and to
2895 decompress the frame. We try to avoid that in most cases as
2896 it takes longer and uses more memory. For MPEG-4, we need to
2897 decompress for QuickTime.
2899 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2900 least one frame of codec data, this makes sure the codec initializes
2901 the channel configuration and does not only trust the values from the container.
2903 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2905 st->codec_info_nb_frames++;
2910 AVPacket empty_pkt = { 0 };
2912 av_init_packet(&empty_pkt);
2914 ret = -1; /* we could not have all the codec parameters before EOF */
2915 for(i=0;i<ic->nb_streams;i++) {
2918 st = ic->streams[i];
2920 /* flush the decoders */
2921 if (st->info->found_decoder == 1) {
2923 err = try_decode_frame(st, &empty_pkt,
2924 (options && i < orig_nb_streams) ?
2925 &options[i] : NULL);
2926 } while (err > 0 && !has_codec_parameters(st, NULL));
2929 av_log(ic, AV_LOG_INFO,
2930 "decoding for stream %d failed\n", st->index);
2934 if (!has_codec_parameters(st, &errmsg)) {
2936 avcodec_string(buf, sizeof(buf), st->codec, 0);
2937 av_log(ic, AV_LOG_WARNING,
2938 "Could not find codec parameters for stream %d (%s): %s\n"
2939 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2947 // close codecs which were opened in try_decode_frame()
2948 for(i=0;i<ic->nb_streams;i++) {
2949 st = ic->streams[i];
2950 avcodec_close(st->codec);
2952 for(i=0;i<ic->nb_streams;i++) {
2953 st = ic->streams[i];
2954 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2955 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2956 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2957 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2958 st->codec->codec_tag= tag;
2961 /* estimate average framerate if not set by demuxer */
2962 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2964 double best_error = 0.01;
2966 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2967 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2968 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2970 /* round guessed framerate to a "standard" framerate if it's
2971 * within 1% of the original estimate*/
2972 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2973 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2974 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2976 if (error < best_error) {
2978 best_fps = std_fps.num;
2982 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2983 best_fps, 12*1001, INT_MAX);
2986 // the check for tb_unreliable() is not completely correct, since this is not about handling
2987 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2988 // ipmovie.c produces.
2989 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)
2990 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);
2991 if (st->info->duration_count>1 && !st->r_frame_rate.num
2992 && tb_unreliable(st->codec)) {
2994 double best_error= 0.01;
2996 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2999 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
3001 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
3004 int n= st->info->duration_count;
3005 double a= st->info->duration_error[k][0][j] / n;
3006 double error= st->info->duration_error[k][1][j]/n - a*a;
3008 if(error < best_error && best_error> 0.000000001){
3010 num = get_std_framerate(j);
3013 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3016 // do not increase frame rate by more than 1 % in order to match a standard rate.
3017 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
3018 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3021 if (!st->r_frame_rate.num){
3022 if( st->codec->time_base.den * (int64_t)st->time_base.num
3023 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
3024 st->r_frame_rate.num = st->codec->time_base.den;
3025 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3027 st->r_frame_rate.num = st->time_base.den;
3028 st->r_frame_rate.den = st->time_base.num;
3031 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3032 if(!st->codec->bits_per_coded_sample)
3033 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
3034 // set stream disposition based on audio service type
3035 switch (st->codec->audio_service_type) {
3036 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3037 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
3038 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3039 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
3040 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3041 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
3042 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3043 st->disposition = AV_DISPOSITION_COMMENT; break;
3044 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3045 st->disposition = AV_DISPOSITION_KARAOKE; break;
3051 estimate_timings(ic, old_offset);
3053 compute_chapters_end(ic);
3055 find_stream_info_err:
3056 for (i=0; i < ic->nb_streams; i++) {
3057 if (ic->streams[i]->codec)
3058 ic->streams[i]->codec->thread_count = 0;
3059 av_freep(&ic->streams[i]->info);
3062 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
3066 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3070 for (i = 0; i < ic->nb_programs; i++) {
3071 if (ic->programs[i] == last) {
3075 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3076 if (ic->programs[i]->stream_index[j] == s)
3077 return ic->programs[i];
3083 int av_find_best_stream(AVFormatContext *ic,
3084 enum AVMediaType type,
3085 int wanted_stream_nb,
3087 AVCodec **decoder_ret,
3090 int i, nb_streams = ic->nb_streams;
3091 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3092 unsigned *program = NULL;
3093 AVCodec *decoder = NULL, *best_decoder = NULL;
3095 if (related_stream >= 0 && wanted_stream_nb < 0) {
3096 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3098 program = p->stream_index;
3099 nb_streams = p->nb_stream_indexes;
3102 for (i = 0; i < nb_streams; i++) {
3103 int real_stream_index = program ? program[i] : i;
3104 AVStream *st = ic->streams[real_stream_index];
3105 AVCodecContext *avctx = st->codec;
3106 if (avctx->codec_type != type)
3108 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3110 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3113 decoder = avcodec_find_decoder(st->codec->codec_id);
3116 ret = AVERROR_DECODER_NOT_FOUND;
3120 count = st->codec_info_nb_frames;
3121 bitrate = avctx->bit_rate;
3122 multiframe = FFMIN(5, count);
3123 if ((best_multiframe > multiframe) ||
3124 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3125 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3128 best_bitrate = bitrate;
3129 best_multiframe = multiframe;
3130 ret = real_stream_index;
3131 best_decoder = decoder;
3132 if (program && i == nb_streams - 1 && ret < 0) {
3134 nb_streams = ic->nb_streams;
3135 i = 0; /* no related stream found, try again with everything */
3139 *decoder_ret = best_decoder;
3143 /*******************************************************/
3145 int av_read_play(AVFormatContext *s)
3147 if (s->iformat->read_play)
3148 return s->iformat->read_play(s);
3150 return avio_pause(s->pb, 0);
3151 return AVERROR(ENOSYS);
3154 int av_read_pause(AVFormatContext *s)
3156 if (s->iformat->read_pause)
3157 return s->iformat->read_pause(s);
3159 return avio_pause(s->pb, 1);
3160 return AVERROR(ENOSYS);
3163 void ff_free_stream(AVFormatContext *s, AVStream *st){
3164 av_assert0(s->nb_streams>0);
3165 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3168 av_parser_close(st->parser);
3170 if (st->attached_pic.data)
3171 av_free_packet(&st->attached_pic);
3172 av_dict_free(&st->metadata);
3173 av_freep(&st->index_entries);
3174 av_freep(&st->codec->extradata);
3175 av_freep(&st->codec->subtitle_header);
3176 av_freep(&st->codec);
3177 av_freep(&st->priv_data);
3178 av_freep(&st->info);
3179 av_freep(&st->probe_data.buf);
3180 av_freep(&s->streams[ --s->nb_streams ]);
3183 void avformat_free_context(AVFormatContext *s)
3191 if (s->iformat && s->iformat->priv_class && s->priv_data)
3192 av_opt_free(s->priv_data);
3194 for(i=s->nb_streams-1; i>=0; i--) {
3195 ff_free_stream(s, s->streams[i]);
3197 for(i=s->nb_programs-1; i>=0; i--) {
3198 av_dict_free(&s->programs[i]->metadata);
3199 av_freep(&s->programs[i]->stream_index);
3200 av_freep(&s->programs[i]);
3202 av_freep(&s->programs);
3203 av_freep(&s->priv_data);
3204 while(s->nb_chapters--) {
3205 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3206 av_freep(&s->chapters[s->nb_chapters]);
3208 av_freep(&s->chapters);
3209 av_dict_free(&s->metadata);
3210 av_freep(&s->streams);
3214 #if FF_API_CLOSE_INPUT_FILE
3215 void av_close_input_file(AVFormatContext *s)
3217 avformat_close_input(&s);
3221 void avformat_close_input(AVFormatContext **ps)
3223 AVFormatContext *s = *ps;
3224 AVIOContext *pb = s->pb;
3226 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3227 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3230 flush_packet_queue(s);
3233 if (s->iformat->read_close)
3234 s->iformat->read_close(s);
3237 avformat_free_context(s);
3244 #if FF_API_NEW_STREAM
3245 AVStream *av_new_stream(AVFormatContext *s, int id)
3247 AVStream *st = avformat_new_stream(s, NULL);
3254 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3260 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3262 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3265 s->streams = streams;
3267 st = av_mallocz(sizeof(AVStream));
3270 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3274 st->info->last_dts = AV_NOPTS_VALUE;
3276 st->codec = avcodec_alloc_context3(c);
3278 /* no default bitrate if decoding */
3279 st->codec->bit_rate = 0;
3281 st->index = s->nb_streams;
3282 st->start_time = AV_NOPTS_VALUE;
3283 st->duration = AV_NOPTS_VALUE;
3284 /* we set the current DTS to 0 so that formats without any timestamps
3285 but durations get some timestamps, formats with some unknown
3286 timestamps have their first few packets buffered and the
3287 timestamps corrected before they are returned to the user */
3288 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3289 st->first_dts = AV_NOPTS_VALUE;
3290 st->probe_packets = MAX_PROBE_PACKETS;
3291 st->pts_wrap_reference = AV_NOPTS_VALUE;
3292 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3294 /* default pts setting is MPEG-like */
3295 avpriv_set_pts_info(st, 33, 1, 90000);
3296 st->last_IP_pts = AV_NOPTS_VALUE;
3297 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3298 st->pts_buffer[i]= AV_NOPTS_VALUE;
3299 st->reference_dts = AV_NOPTS_VALUE;
3301 st->sample_aspect_ratio = (AVRational){0,1};
3303 #if FF_API_R_FRAME_RATE
3304 st->info->last_dts = AV_NOPTS_VALUE;
3306 st->info->fps_first_dts = AV_NOPTS_VALUE;
3307 st->info->fps_last_dts = AV_NOPTS_VALUE;
3309 s->streams[s->nb_streams++] = st;
3313 AVProgram *av_new_program(AVFormatContext *ac, int id)
3315 AVProgram *program=NULL;
3318 av_dlog(ac, "new_program: id=0x%04x\n", id);
3320 for(i=0; i<ac->nb_programs; i++)
3321 if(ac->programs[i]->id == id)
3322 program = ac->programs[i];
3325 program = av_mallocz(sizeof(AVProgram));
3328 dynarray_add(&ac->programs, &ac->nb_programs, program);
3329 program->discard = AVDISCARD_NONE;
3332 program->pts_wrap_reference = AV_NOPTS_VALUE;
3333 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3335 program->start_time =
3336 program->end_time = AV_NOPTS_VALUE;
3341 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3343 AVChapter *chapter = NULL;
3346 for(i=0; i<s->nb_chapters; i++)
3347 if(s->chapters[i]->id == id)
3348 chapter = s->chapters[i];
3351 chapter= av_mallocz(sizeof(AVChapter));
3354 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3356 av_dict_set(&chapter->metadata, "title", title, 0);
3358 chapter->time_base= time_base;
3359 chapter->start = start;
3365 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3368 AVProgram *program=NULL;
3371 if (idx >= ac->nb_streams) {
3372 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3376 for(i=0; i<ac->nb_programs; i++){
3377 if(ac->programs[i]->id != progid)
3379 program = ac->programs[i];
3380 for(j=0; j<program->nb_stream_indexes; j++)
3381 if(program->stream_index[j] == idx)
3384 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3387 program->stream_index = tmp;
3388 program->stream_index[program->nb_stream_indexes++] = idx;
3393 static void print_fps(double d, const char *postfix){
3394 uint64_t v= lrintf(d*100);
3395 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3396 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3397 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3400 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3402 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3403 AVDictionaryEntry *tag=NULL;
3405 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3406 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3407 if(strcmp("language", tag->key)){
3408 const char *p = tag->value;
3409 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3412 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3413 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3414 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3416 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3417 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3420 av_log(ctx, AV_LOG_INFO, "\n");
3426 /* "user interface" functions */
3427 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3430 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3431 AVStream *st = ic->streams[i];
3432 int g = av_gcd(st->time_base.num, st->time_base.den);
3433 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3434 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3435 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3436 /* the pid is an important information, so we display it */
3437 /* XXX: add a generic system */
3438 if (flags & AVFMT_SHOW_IDS)
3439 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3441 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3442 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3443 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3444 if (st->sample_aspect_ratio.num && // default
3445 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3446 AVRational display_aspect_ratio;
3447 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3448 st->codec->width*st->sample_aspect_ratio.num,
3449 st->codec->height*st->sample_aspect_ratio.den,
3451 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3452 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3453 display_aspect_ratio.num, display_aspect_ratio.den);
3455 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3456 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3457 print_fps(av_q2d(st->avg_frame_rate), "fps");
3458 #if FF_API_R_FRAME_RATE
3459 if(st->r_frame_rate.den && st->r_frame_rate.num)
3460 print_fps(av_q2d(st->r_frame_rate), "tbr");
3462 if(st->time_base.den && st->time_base.num)
3463 print_fps(1/av_q2d(st->time_base), "tbn");
3464 if(st->codec->time_base.den && st->codec->time_base.num)
3465 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3467 if (st->disposition & AV_DISPOSITION_DEFAULT)
3468 av_log(NULL, AV_LOG_INFO, " (default)");
3469 if (st->disposition & AV_DISPOSITION_DUB)
3470 av_log(NULL, AV_LOG_INFO, " (dub)");
3471 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3472 av_log(NULL, AV_LOG_INFO, " (original)");
3473 if (st->disposition & AV_DISPOSITION_COMMENT)
3474 av_log(NULL, AV_LOG_INFO, " (comment)");
3475 if (st->disposition & AV_DISPOSITION_LYRICS)
3476 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3477 if (st->disposition & AV_DISPOSITION_KARAOKE)
3478 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3479 if (st->disposition & AV_DISPOSITION_FORCED)
3480 av_log(NULL, AV_LOG_INFO, " (forced)");
3481 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3482 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3483 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3484 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3485 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3486 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3487 av_log(NULL, AV_LOG_INFO, "\n");
3488 dump_metadata(NULL, st->metadata, " ");
3491 void av_dump_format(AVFormatContext *ic,
3497 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3498 if (ic->nb_streams && !printed)
3501 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3502 is_output ? "Output" : "Input",
3504 is_output ? ic->oformat->name : ic->iformat->name,
3505 is_output ? "to" : "from", url);
3506 dump_metadata(NULL, ic->metadata, " ");
3508 av_log(NULL, AV_LOG_INFO, " Duration: ");
3509 if (ic->duration != AV_NOPTS_VALUE) {
3510 int hours, mins, secs, us;
3511 int64_t duration = ic->duration + 5000;
3512 secs = duration / AV_TIME_BASE;
3513 us = duration % AV_TIME_BASE;
3518 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3519 (100 * us) / AV_TIME_BASE);
3521 av_log(NULL, AV_LOG_INFO, "N/A");
3523 if (ic->start_time != AV_NOPTS_VALUE) {
3525 av_log(NULL, AV_LOG_INFO, ", start: ");
3526 secs = ic->start_time / AV_TIME_BASE;
3527 us = abs(ic->start_time % AV_TIME_BASE);
3528 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3529 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3531 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3533 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3535 av_log(NULL, AV_LOG_INFO, "N/A");
3537 av_log(NULL, AV_LOG_INFO, "\n");
3539 for (i = 0; i < ic->nb_chapters; i++) {
3540 AVChapter *ch = ic->chapters[i];
3541 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3542 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3543 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3545 dump_metadata(NULL, ch->metadata, " ");
3547 if(ic->nb_programs) {
3548 int j, k, total = 0;
3549 for(j=0; j<ic->nb_programs; j++) {
3550 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3552 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3553 name ? name->value : "");
3554 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3555 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3556 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3557 printed[ic->programs[j]->stream_index[k]] = 1;
3559 total += ic->programs[j]->nb_stream_indexes;
3561 if (total < ic->nb_streams)
3562 av_log(NULL, AV_LOG_INFO, " No Program\n");
3564 for(i=0;i<ic->nb_streams;i++)
3566 dump_stream_format(ic, i, index, is_output);
3571 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3572 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3574 return av_gettime();
3578 uint64_t ff_ntp_time(void)
3580 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3583 int av_get_frame_filename(char *buf, int buf_size,
3584 const char *path, int number)
3587 char *q, buf1[20], c;
3588 int nd, len, percentd_found;
3600 while (isdigit(*p)) {
3601 nd = nd * 10 + *p++ - '0';
3604 } while (isdigit(c));
3613 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3615 if ((q - buf + len) > buf_size - 1)
3617 memcpy(q, buf1, len);
3625 if ((q - buf) < buf_size - 1)
3629 if (!percentd_found)
3638 static void hex_dump_internal(void *avcl, FILE *f, int level,
3639 const uint8_t *buf, int size)
3642 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3644 for(i=0;i<size;i+=16) {
3651 PRINT(" %02x", buf[i+j]);
3656 for(j=0;j<len;j++) {
3658 if (c < ' ' || c > '~')
3667 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3669 hex_dump_internal(NULL, f, 0, buf, size);
3672 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3674 hex_dump_internal(avcl, NULL, level, buf, size);
3677 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3679 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3680 PRINT("stream #%d:\n", pkt->stream_index);
3681 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3682 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3683 /* DTS is _always_ valid after av_read_frame() */
3685 if (pkt->dts == AV_NOPTS_VALUE)
3688 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3689 /* PTS may not be known if B-frames are present. */
3691 if (pkt->pts == AV_NOPTS_VALUE)
3694 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3696 PRINT(" size=%d\n", pkt->size);
3699 av_hex_dump(f, pkt->data, pkt->size);
3703 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3705 AVRational tb = { 1, AV_TIME_BASE };
3706 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3710 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3712 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3716 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3718 AVRational tb = { 1, AV_TIME_BASE };
3719 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3723 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3726 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3729 void av_url_split(char *proto, int proto_size,
3730 char *authorization, int authorization_size,
3731 char *hostname, int hostname_size,
3733 char *path, int path_size,
3736 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3738 if (port_ptr) *port_ptr = -1;
3739 if (proto_size > 0) proto[0] = 0;
3740 if (authorization_size > 0) authorization[0] = 0;
3741 if (hostname_size > 0) hostname[0] = 0;
3742 if (path_size > 0) path[0] = 0;
3744 /* parse protocol */
3745 if ((p = strchr(url, ':'))) {
3746 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3751 /* no protocol means plain filename */
3752 av_strlcpy(path, url, path_size);
3756 /* separate path from hostname */
3757 ls = strchr(p, '/');
3758 ls2 = strchr(p, '?');
3762 ls = FFMIN(ls, ls2);
3764 av_strlcpy(path, ls, path_size);
3766 ls = &p[strlen(p)]; // XXX
3768 /* the rest is hostname, use that to parse auth/port */
3770 /* authorization (user[:pass]@hostname) */
3772 while ((at = strchr(p, '@')) && at < ls) {
3773 av_strlcpy(authorization, at2,
3774 FFMIN(authorization_size, at + 1 - at2));
3775 p = at + 1; /* skip '@' */
3778 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3780 av_strlcpy(hostname, p + 1,
3781 FFMIN(hostname_size, brk - p));
3782 if (brk[1] == ':' && port_ptr)
3783 *port_ptr = atoi(brk + 2);
3784 } else if ((col = strchr(p, ':')) && col < ls) {
3785 av_strlcpy(hostname, p,
3786 FFMIN(col + 1 - p, hostname_size));
3787 if (port_ptr) *port_ptr = atoi(col + 1);
3789 av_strlcpy(hostname, p,
3790 FFMIN(ls + 1 - p, hostname_size));
3794 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3797 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3800 'C', 'D', 'E', 'F' };
3801 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3804 'c', 'd', 'e', 'f' };
3805 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3807 for(i = 0; i < s; i++) {
3808 buff[i * 2] = hex_table[src[i] >> 4];
3809 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3815 int ff_hex_to_data(uint8_t *data, const char *p)
3822 p += strspn(p, SPACE_CHARS);
3825 c = toupper((unsigned char) *p++);
3826 if (c >= '0' && c <= '9')
3828 else if (c >= 'A' && c <= 'F')
3843 #if FF_API_SET_PTS_INFO
3844 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3845 unsigned int pts_num, unsigned int pts_den)
3847 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3851 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3852 unsigned int pts_num, unsigned int pts_den)
3855 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3856 if(new_tb.num != pts_num)
3857 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3859 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3861 if(new_tb.num <= 0 || new_tb.den <= 0) {
3862 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);
3865 s->time_base = new_tb;
3866 av_codec_set_pkt_timebase(s->codec, new_tb);
3867 s->pts_wrap_bits = pts_wrap_bits;
3870 int ff_url_join(char *str, int size, const char *proto,
3871 const char *authorization, const char *hostname,
3872 int port, const char *fmt, ...)
3875 struct addrinfo hints = { 0 }, *ai;
3880 av_strlcatf(str, size, "%s://", proto);
3881 if (authorization && authorization[0])
3882 av_strlcatf(str, size, "%s@", authorization);
3883 #if CONFIG_NETWORK && defined(AF_INET6)
3884 /* Determine if hostname is a numerical IPv6 address,
3885 * properly escape it within [] in that case. */
3886 hints.ai_flags = AI_NUMERICHOST;
3887 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3888 if (ai->ai_family == AF_INET6) {
3889 av_strlcat(str, "[", size);
3890 av_strlcat(str, hostname, size);
3891 av_strlcat(str, "]", size);
3893 av_strlcat(str, hostname, size);
3898 /* Not an IPv6 address, just output the plain string. */
3899 av_strlcat(str, hostname, size);
3902 av_strlcatf(str, size, ":%d", port);
3905 int len = strlen(str);
3908 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3914 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3915 AVFormatContext *src)
3920 local_pkt.stream_index = dst_stream;
3921 if (pkt->pts != AV_NOPTS_VALUE)
3922 local_pkt.pts = av_rescale_q(pkt->pts,
3923 src->streams[pkt->stream_index]->time_base,
3924 dst->streams[dst_stream]->time_base);
3925 if (pkt->dts != AV_NOPTS_VALUE)
3926 local_pkt.dts = av_rescale_q(pkt->dts,
3927 src->streams[pkt->stream_index]->time_base,
3928 dst->streams[dst_stream]->time_base);
3929 return av_write_frame(dst, &local_pkt);
3932 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3935 const char *ptr = str;
3937 /* Parse key=value pairs. */
3940 char *dest = NULL, *dest_end;
3941 int key_len, dest_len = 0;
3943 /* Skip whitespace and potential commas. */
3944 while (*ptr && (isspace(*ptr) || *ptr == ','))
3951 if (!(ptr = strchr(key, '=')))
3954 key_len = ptr - key;
3956 callback_get_buf(context, key, key_len, &dest, &dest_len);
3957 dest_end = dest + dest_len - 1;
3961 while (*ptr && *ptr != '\"') {
3965 if (dest && dest < dest_end)
3969 if (dest && dest < dest_end)
3977 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3978 if (dest && dest < dest_end)
3986 int ff_find_stream_index(AVFormatContext *s, int id)
3989 for (i = 0; i < s->nb_streams; i++) {
3990 if (s->streams[i]->id == id)
3996 void ff_make_absolute_url(char *buf, int size, const char *base,
3999 char *sep, *path_query;
4000 /* Absolute path, relative to the current server */
4001 if (base && strstr(base, "://") && rel[0] == '/') {
4003 av_strlcpy(buf, base, size);
4004 sep = strstr(buf, "://");
4006 /* Take scheme from base url */
4007 if (rel[1] == '/') {
4010 /* Take scheme and host from base url */
4012 sep = strchr(sep, '/');
4017 av_strlcat(buf, rel, size);
4020 /* If rel actually is an absolute url, just copy it */
4021 if (!base || strstr(rel, "://") || rel[0] == '/') {
4022 av_strlcpy(buf, rel, size);
4026 av_strlcpy(buf, base, size);
4028 /* Strip off any query string from base */
4029 path_query = strchr(buf, '?');
4030 if (path_query != NULL)
4033 /* Is relative path just a new query part? */
4034 if (rel[0] == '?') {
4035 av_strlcat(buf, rel, size);
4039 /* Remove the file name from the base url */
4040 sep = strrchr(buf, '/');
4045 while (av_strstart(rel, "../", NULL) && sep) {
4046 /* Remove the path delimiter at the end */
4048 sep = strrchr(buf, '/');
4049 /* If the next directory name to pop off is "..", break here */
4050 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4051 /* Readd the slash we just removed */
4052 av_strlcat(buf, "/", size);
4055 /* Cut off the directory name */
4062 av_strlcat(buf, rel, size);
4065 int64_t ff_iso8601_to_unix_time(const char *datestr)
4067 struct tm time1 = {0}, time2 = {0};
4069 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4070 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4072 return av_timegm(&time2);
4074 return av_timegm(&time1);
4077 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
4080 if (ofmt->query_codec)
4081 return ofmt->query_codec(codec_id, std_compliance);
4082 else if (ofmt->codec_tag)
4083 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4084 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4085 codec_id == ofmt->subtitle_codec)
4088 return AVERROR_PATCHWELCOME;
4091 int avformat_network_init(void)
4095 ff_network_inited_globally = 1;
4096 if ((ret = ff_network_init()) < 0)
4103 int avformat_network_deinit(void)
4112 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4113 uint64_t channel_layout, int32_t sample_rate,
4114 int32_t width, int32_t height)
4120 return AVERROR(EINVAL);
4123 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4125 if (channel_layout) {
4127 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4131 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4133 if (width || height) {
4135 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4137 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4139 return AVERROR(ENOMEM);
4140 bytestream_put_le32(&data, flags);
4142 bytestream_put_le32(&data, channels);
4144 bytestream_put_le64(&data, channel_layout);
4146 bytestream_put_le32(&data, sample_rate);
4147 if (width || height) {
4148 bytestream_put_le32(&data, width);
4149 bytestream_put_le32(&data, height);
4154 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4156 return ff_codec_bmp_tags;
4158 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4160 return ff_codec_wav_tags;
4163 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4165 AVRational undef = {0, 1};
4166 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4167 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4168 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4170 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4171 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4172 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4173 stream_sample_aspect_ratio = undef;
4175 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4176 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4177 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4178 frame_sample_aspect_ratio = undef;
4180 if (stream_sample_aspect_ratio.num)
4181 return stream_sample_aspect_ratio;
4183 return frame_sample_aspect_ratio;
4186 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4189 if (*spec <= '9' && *spec >= '0') /* opt:index */
4190 return strtol(spec, NULL, 0) == st->index;
4191 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4192 *spec == 't') { /* opt:[vasdt] */
4193 enum AVMediaType type;
4196 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4197 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4198 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4199 case 'd': type = AVMEDIA_TYPE_DATA; break;
4200 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4201 default: av_assert0(0);
4203 if (type != st->codec->codec_type)
4205 if (*spec++ == ':') { /* possibly followed by :index */
4206 int i, index = strtol(spec, NULL, 0);
4207 for (i = 0; i < s->nb_streams; i++)
4208 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4209 return i == st->index;
4213 } else if (*spec == 'p' && *(spec + 1) == ':') {
4217 prog_id = strtol(spec, &endptr, 0);
4218 for (i = 0; i < s->nb_programs; i++) {
4219 if (s->programs[i]->id != prog_id)
4222 if (*endptr++ == ':') {
4223 int stream_idx = strtol(endptr, NULL, 0);
4224 return stream_idx >= 0 &&
4225 stream_idx < s->programs[i]->nb_stream_indexes &&
4226 st->index == s->programs[i]->stream_index[stream_idx];
4229 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4230 if (st->index == s->programs[i]->stream_index[j])
4234 } else if (*spec == '#') {
4237 sid = strtol(spec + 1, &endptr, 0);
4239 return st->id == sid;
4240 } else if (!*spec) /* empty specifier, matches everything */
4243 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4244 return AVERROR(EINVAL);