2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
298 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
301 lpd.buf = zerobuffer;
303 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
304 int id3len = ff_id3v2_tag_len(lpd.buf);
305 if (lpd.buf_size > id3len + 16) {
307 lpd.buf_size -= id3len;
313 while ((fmt1 = av_iformat_next(fmt1))) {
314 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
317 if (fmt1->read_probe) {
318 score = fmt1->read_probe(&lpd);
319 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
320 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
321 } else if (fmt1->extensions) {
322 if (av_match_ext(lpd.filename, fmt1->extensions)) {
326 if (score > score_max) {
329 }else if (score == score_max)
332 *score_ret= score_max;
337 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
341 if(score_ret > *score_max){
342 *score_max= score_ret;
348 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
350 return av_probe_input_format2(pd, is_opened, &score);
353 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
355 static const struct {
356 const char *name; enum AVCodecID id; enum AVMediaType type;
358 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
359 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
360 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
361 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
362 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
363 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
364 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
365 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
366 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
372 if (fmt && st->request_probe <= score) {
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
390 int av_demuxer_open(AVFormatContext *ic){
393 if (ic->iformat->read_header) {
394 err = ic->iformat->read_header(ic);
399 if (ic->pb && !ic->data_offset)
400 ic->data_offset = avio_tell(ic->pb);
406 /** size of probe buffer, for guessing file type from file contents */
407 #define PROBE_BUF_MIN 2048
408 #define PROBE_BUF_MAX (1<<20)
410 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
411 const char *filename, void *logctx,
412 unsigned int offset, unsigned int max_probe_size)
414 AVProbeData pd = { filename ? filename : "", NULL, -offset };
415 unsigned char *buf = NULL;
417 int ret = 0, probe_size, buf_offset = 0;
419 if (!max_probe_size) {
420 max_probe_size = PROBE_BUF_MAX;
421 } else if (max_probe_size > PROBE_BUF_MAX) {
422 max_probe_size = PROBE_BUF_MAX;
423 } else if (max_probe_size < PROBE_BUF_MIN) {
424 return AVERROR(EINVAL);
427 if (offset >= max_probe_size) {
428 return AVERROR(EINVAL);
431 if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
432 if (!av_strcasecmp(mime_type, "audio/aacp")) {
433 *fmt = av_find_input_format("aac");
435 av_freep(&mime_type);
438 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
439 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
440 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
443 if (probe_size < offset) {
447 /* read probe data */
448 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
451 return AVERROR(ENOMEM);
454 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
455 /* fail if error was not end of file, otherwise, lower score */
456 if (ret != AVERROR_EOF) {
461 ret = 0; /* error was end of file, nothing read */
463 pd.buf_size = buf_offset += ret;
464 pd.buf = &buf[offset];
466 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
468 /* guess file format */
469 *fmt = av_probe_input_format2(&pd, 1, &score);
471 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
472 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
474 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
480 return AVERROR_INVALIDDATA;
483 /* rewind. reuse probe buffer to avoid seeking */
484 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
489 /* open input file and probe the format if necessary */
490 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
493 AVProbeData pd = {filename, NULL, 0};
494 int score = AVPROBE_SCORE_RETRY;
497 s->flags |= AVFMT_FLAG_CUSTOM_IO;
499 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
500 else if (s->iformat->flags & AVFMT_NOFILE)
501 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
502 "will be ignored with AVFMT_NOFILE format.\n");
506 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
507 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
510 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
511 &s->interrupt_callback, options)) < 0)
515 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
518 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
519 AVPacketList **plast_pktl){
520 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
525 (*plast_pktl)->next = pktl;
527 *packet_buffer = pktl;
529 /* add the packet in the buffered packet list */
535 void avformat_queue_attached_pictures(AVFormatContext *s)
538 for (i = 0; i < s->nb_streams; i++)
539 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
540 s->streams[i]->discard < AVDISCARD_ALL) {
541 AVPacket copy = s->streams[i]->attached_pic;
542 copy.destruct = NULL;
543 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
547 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
549 AVFormatContext *s = *ps;
551 AVDictionary *tmp = NULL;
552 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
554 if (!s && !(s = avformat_alloc_context()))
555 return AVERROR(ENOMEM);
557 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
558 return AVERROR(EINVAL);
564 av_dict_copy(&tmp, *options, 0);
566 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
569 if ((ret = init_input(s, filename, &tmp)) < 0)
571 avio_skip(s->pb, s->skip_initial_bytes);
573 /* check filename in case an image number is expected */
574 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
575 if (!av_filename_number_test(filename)) {
576 ret = AVERROR(EINVAL);
581 s->duration = s->start_time = AV_NOPTS_VALUE;
582 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
584 /* allocate private data */
585 if (s->iformat->priv_data_size > 0) {
586 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
587 ret = AVERROR(ENOMEM);
590 if (s->iformat->priv_class) {
591 *(const AVClass**)s->priv_data = s->iformat->priv_class;
592 av_opt_set_defaults(s->priv_data);
593 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
598 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
600 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
602 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
603 if ((ret = s->iformat->read_header(s)) < 0)
606 if (id3v2_extra_meta) {
607 if (!strcmp(s->iformat->name, "mp3")) {
608 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
611 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
613 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
615 avformat_queue_attached_pictures(s);
617 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
618 s->data_offset = avio_tell(s->pb);
620 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
623 av_dict_free(options);
630 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
632 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
634 avformat_free_context(s);
639 /*******************************************************/
641 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
643 if(st->request_probe>0){
644 AVProbeData *pd = &st->probe_data;
646 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
650 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
654 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
655 pd->buf_size += pkt->size;
656 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
659 st->probe_packets = 0;
661 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
666 end= s->raw_packet_buffer_remaining_size <= 0
667 || st->probe_packets<=0;
669 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
670 int score= set_codec_from_probe_data(s, st, pd);
671 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
675 st->request_probe= -1;
676 if(st->codec->codec_id != AV_CODEC_ID_NONE){
677 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
679 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
685 static void force_codec_ids(AVFormatContext *s, AVStream *st)
687 switch(st->codec->codec_type){
688 case AVMEDIA_TYPE_VIDEO:
689 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
691 case AVMEDIA_TYPE_AUDIO:
692 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
694 case AVMEDIA_TYPE_SUBTITLE:
695 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
700 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
706 AVPacketList *pktl = s->raw_packet_buffer;
710 st = s->streams[pkt->stream_index];
711 if(st->request_probe <= 0){
712 s->raw_packet_buffer = pktl->next;
713 s->raw_packet_buffer_remaining_size += pkt->size;
722 ret= s->iformat->read_packet(s, pkt);
724 if (!pktl || ret == AVERROR(EAGAIN))
726 for (i = 0; i < s->nb_streams; i++) {
728 if (st->probe_packets) {
729 probe_codec(s, st, NULL);
731 av_assert0(st->request_probe <= 0);
736 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
737 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
738 av_log(s, AV_LOG_WARNING,
739 "Dropped corrupted packet (stream = %d)\n",
745 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
746 av_packet_merge_side_data(pkt);
748 if(pkt->stream_index >= (unsigned)s->nb_streams){
749 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
753 st= s->streams[pkt->stream_index];
755 force_codec_ids(s, st);
757 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
758 if (s->use_wallclock_as_timestamps)
759 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
761 if(!pktl && st->request_probe <= 0)
764 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
765 s->raw_packet_buffer_remaining_size -= pkt->size;
767 probe_codec(s, st, pkt);
771 #if FF_API_READ_PACKET
772 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
774 return ff_read_packet(s, pkt);
779 /**********************************************************/
781 static int determinable_frame_size(AVCodecContext *avctx)
783 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
784 avctx->codec_id == AV_CODEC_ID_MP1 ||
785 avctx->codec_id == AV_CODEC_ID_MP2 ||
786 avctx->codec_id == AV_CODEC_ID_MP3/* ||
787 avctx->codec_id == AV_CODEC_ID_CELT*/)
793 * Get the number of samples of an audio frame. Return -1 on error.
795 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
799 /* give frame_size priority if demuxing */
800 if (!mux && enc->frame_size > 1)
801 return enc->frame_size;
803 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
806 /* fallback to using frame_size if muxing */
807 if (enc->frame_size > 1)
808 return enc->frame_size;
815 * Return the frame duration in seconds. Return 0 if not available.
817 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
818 AVCodecParserContext *pc, AVPacket *pkt)
824 switch(st->codec->codec_type) {
825 case AVMEDIA_TYPE_VIDEO:
826 if (st->r_frame_rate.num && !pc) {
827 *pnum = st->r_frame_rate.den;
828 *pden = st->r_frame_rate.num;
829 } else if(st->time_base.num*1000LL > st->time_base.den) {
830 *pnum = st->time_base.num;
831 *pden = st->time_base.den;
832 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
833 *pnum = st->codec->time_base.num;
834 *pden = st->codec->time_base.den;
835 if (pc && pc->repeat_pict) {
836 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
837 *pden /= 1 + pc->repeat_pict;
839 *pnum *= 1 + pc->repeat_pict;
841 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
842 //Thus if we have no parser in such case leave duration undefined.
843 if(st->codec->ticks_per_frame>1 && !pc){
848 case AVMEDIA_TYPE_AUDIO:
849 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
850 if (frame_size <= 0 || st->codec->sample_rate <= 0)
853 *pden = st->codec->sample_rate;
860 static int is_intra_only(AVCodecContext *enc){
861 const AVCodecDescriptor *desc;
863 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
866 desc = av_codec_get_codec_descriptor(enc);
868 desc = avcodec_descriptor_get(enc->codec_id);
869 av_codec_set_codec_descriptor(enc, desc);
872 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
876 static int has_decode_delay_been_guessed(AVStream *st)
878 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
879 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
881 #if CONFIG_H264_DECODER
882 if(st->codec->has_b_frames &&
883 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
886 if(st->codec->has_b_frames<3)
887 return st->nb_decoded_frames >= 7;
888 else if(st->codec->has_b_frames<4)
889 return st->nb_decoded_frames >= 18;
891 return st->nb_decoded_frames >= 20;
894 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
898 if (pktl == s->parse_queue_end)
899 return s->packet_buffer;
903 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
904 int64_t dts, int64_t pts)
906 AVStream *st= s->streams[stream_index];
907 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
908 int64_t pts_buffer[MAX_REORDER_DELAY+1];
912 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
915 delay = st->codec->has_b_frames;
916 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
918 shift = st->first_dts - RELATIVE_TS_BASE;
920 for (i=0; i<MAX_REORDER_DELAY+1; i++)
921 pts_buffer[i] = AV_NOPTS_VALUE;
923 if (is_relative(pts))
926 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
927 if(pktl->pkt.stream_index != stream_index)
929 if(is_relative(pktl->pkt.pts))
930 pktl->pkt.pts += shift;
932 if(is_relative(pktl->pkt.dts))
933 pktl->pkt.dts += shift;
935 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
936 st->start_time= pktl->pkt.pts;
938 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
939 pts_buffer[0]= pktl->pkt.pts;
940 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
941 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
942 if(pktl->pkt.dts == AV_NOPTS_VALUE)
943 pktl->pkt.dts= pts_buffer[0];
946 if (st->start_time == AV_NOPTS_VALUE)
947 st->start_time = pts;
950 static void update_initial_durations(AVFormatContext *s, AVStream *st,
951 int stream_index, int duration)
953 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
954 int64_t cur_dts= RELATIVE_TS_BASE;
956 if(st->first_dts != AV_NOPTS_VALUE){
957 cur_dts= st->first_dts;
958 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
959 if(pktl->pkt.stream_index == stream_index){
960 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
965 if(pktl && pktl->pkt.dts != st->first_dts) {
966 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));
970 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
973 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
974 st->first_dts = cur_dts;
975 }else if(st->cur_dts != RELATIVE_TS_BASE)
978 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
979 if(pktl->pkt.stream_index != stream_index)
981 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
982 && !pktl->pkt.duration){
983 pktl->pkt.dts= cur_dts;
984 if(!st->codec->has_b_frames)
985 pktl->pkt.pts= cur_dts;
986 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
987 pktl->pkt.duration = duration;
990 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
993 st->cur_dts= cur_dts;
996 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
997 AVCodecParserContext *pc, AVPacket *pkt)
999 int num, den, presentation_delayed, delay, i;
1002 if (s->flags & AVFMT_FLAG_NOFILLIN)
1005 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1006 pkt->dts= AV_NOPTS_VALUE;
1008 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1009 //FIXME Set low_delay = 0 when has_b_frames = 1
1010 st->codec->has_b_frames = 1;
1012 /* do we have a video B-frame ? */
1013 delay= st->codec->has_b_frames;
1014 presentation_delayed = 0;
1016 /* XXX: need has_b_frame, but cannot get it if the codec is
1019 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1020 presentation_delayed = 1;
1022 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){
1023 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1024 pkt->dts -= 1LL<<st->pts_wrap_bits;
1026 pkt->pts += 1LL<<st->pts_wrap_bits;
1029 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1030 // we take the conservative approach and discard both
1031 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1032 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1033 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1034 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1035 pkt->dts= AV_NOPTS_VALUE;
1038 if (pkt->duration == 0) {
1039 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1041 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1044 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1045 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1047 /* correct timestamps with byte offset if demuxers only have timestamps
1048 on packet boundaries */
1049 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1050 /* this will estimate bitrate based on this frame's duration and size */
1051 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1052 if(pkt->pts != AV_NOPTS_VALUE)
1054 if(pkt->dts != AV_NOPTS_VALUE)
1058 if (pc && pc->dts_sync_point >= 0) {
1059 // we have synchronization info from the parser
1060 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1062 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1063 if (pkt->dts != AV_NOPTS_VALUE) {
1064 // got DTS from the stream, update reference timestamp
1065 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1066 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1067 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1068 // compute DTS based on reference timestamp
1069 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1070 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1072 if (pc->dts_sync_point > 0)
1073 st->reference_dts = pkt->dts; // new reference
1077 /* This may be redundant, but it should not hurt. */
1078 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1079 presentation_delayed = 1;
1081 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1082 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1083 /* interpolate PTS and DTS if they are not present */
1084 //We skip H264 currently because delay and has_b_frames are not reliably set
1085 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1086 if (presentation_delayed) {
1087 /* DTS = decompression timestamp */
1088 /* PTS = presentation timestamp */
1089 if (pkt->dts == AV_NOPTS_VALUE)
1090 pkt->dts = st->last_IP_pts;
1091 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1092 if (pkt->dts == AV_NOPTS_VALUE)
1093 pkt->dts = st->cur_dts;
1095 /* this is tricky: the dts must be incremented by the duration
1096 of the frame we are displaying, i.e. the last I- or P-frame */
1097 if (st->last_IP_duration == 0)
1098 st->last_IP_duration = pkt->duration;
1099 if(pkt->dts != AV_NOPTS_VALUE)
1100 st->cur_dts = pkt->dts + st->last_IP_duration;
1101 st->last_IP_duration = pkt->duration;
1102 st->last_IP_pts= pkt->pts;
1103 /* cannot compute PTS if not present (we can compute it only
1104 by knowing the future */
1105 } else if (pkt->pts != AV_NOPTS_VALUE ||
1106 pkt->dts != AV_NOPTS_VALUE ||
1108 int duration = pkt->duration;
1110 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1111 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1112 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1113 if( old_diff < new_diff && old_diff < (duration>>3)
1114 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1115 && (!strcmp(s->iformat->name, "mpeg") ||
1116 !strcmp(s->iformat->name, "mpegts"))){
1117 pkt->pts += duration;
1118 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1119 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1120 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1124 /* presentation is not delayed : PTS and DTS are the same */
1125 if (pkt->pts == AV_NOPTS_VALUE)
1126 pkt->pts = pkt->dts;
1127 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1129 if (pkt->pts == AV_NOPTS_VALUE)
1130 pkt->pts = st->cur_dts;
1131 pkt->dts = pkt->pts;
1132 if (pkt->pts != AV_NOPTS_VALUE)
1133 st->cur_dts = pkt->pts + duration;
1137 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1138 st->pts_buffer[0]= pkt->pts;
1139 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1140 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1141 if(pkt->dts == AV_NOPTS_VALUE)
1142 pkt->dts= st->pts_buffer[0];
1144 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1145 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1147 if(pkt->dts > st->cur_dts)
1148 st->cur_dts = pkt->dts;
1150 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1151 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1154 if (is_intra_only(st->codec))
1155 pkt->flags |= AV_PKT_FLAG_KEY;
1157 pkt->convergence_duration = pc->convergence_duration;
1160 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1163 AVPacketList *pktl = *pkt_buf;
1164 *pkt_buf = pktl->next;
1165 av_free_packet(&pktl->pkt);
1168 *pkt_buf_end = NULL;
1172 * Parse a packet, add all split parts to parse_queue
1174 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1176 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1178 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1179 AVStream *st = s->streams[stream_index];
1180 uint8_t *data = pkt ? pkt->data : NULL;
1181 int size = pkt ? pkt->size : 0;
1182 int ret = 0, got_output = 0;
1185 av_init_packet(&flush_pkt);
1188 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1189 // preserve 0-size sync packets
1190 compute_pkt_fields(s, st, st->parser, pkt);
1193 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1196 av_init_packet(&out_pkt);
1197 len = av_parser_parse2(st->parser, st->codec,
1198 &out_pkt.data, &out_pkt.size, data, size,
1199 pkt->pts, pkt->dts, pkt->pos);
1201 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1203 /* increment read pointer */
1207 got_output = !!out_pkt.size;
1212 /* set the duration */
1213 out_pkt.duration = 0;
1214 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1215 if (st->codec->sample_rate > 0) {
1216 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1217 (AVRational){ 1, st->codec->sample_rate },
1221 } else if (st->codec->time_base.num != 0 &&
1222 st->codec->time_base.den != 0) {
1223 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1224 st->codec->time_base,
1229 out_pkt.stream_index = st->index;
1230 out_pkt.pts = st->parser->pts;
1231 out_pkt.dts = st->parser->dts;
1232 out_pkt.pos = st->parser->pos;
1234 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1235 out_pkt.pos = st->parser->frame_offset;
1237 if (st->parser->key_frame == 1 ||
1238 (st->parser->key_frame == -1 &&
1239 st->parser->pict_type == AV_PICTURE_TYPE_I))
1240 out_pkt.flags |= AV_PKT_FLAG_KEY;
1242 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1243 out_pkt.flags |= AV_PKT_FLAG_KEY;
1245 compute_pkt_fields(s, st, st->parser, &out_pkt);
1247 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1248 out_pkt.destruct = pkt->destruct;
1249 pkt->destruct = NULL;
1251 if ((ret = av_dup_packet(&out_pkt)) < 0)
1254 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1255 av_free_packet(&out_pkt);
1256 ret = AVERROR(ENOMEM);
1262 /* end of the stream => close and free the parser */
1263 if (pkt == &flush_pkt) {
1264 av_parser_close(st->parser);
1269 av_free_packet(pkt);
1273 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1274 AVPacketList **pkt_buffer_end,
1278 av_assert0(*pkt_buffer);
1281 *pkt_buffer = pktl->next;
1283 *pkt_buffer_end = NULL;
1288 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1290 int ret = 0, i, got_packet = 0;
1292 av_init_packet(pkt);
1294 while (!got_packet && !s->parse_queue) {
1298 /* read next packet */
1299 ret = ff_read_packet(s, &cur_pkt);
1301 if (ret == AVERROR(EAGAIN))
1303 /* flush the parsers */
1304 for(i = 0; i < s->nb_streams; i++) {
1306 if (st->parser && st->need_parsing)
1307 parse_packet(s, NULL, st->index);
1309 /* all remaining packets are now in parse_queue =>
1310 * really terminate parsing */
1314 st = s->streams[cur_pkt.stream_index];
1316 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1317 cur_pkt.dts != AV_NOPTS_VALUE &&
1318 cur_pkt.pts < cur_pkt.dts) {
1319 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1320 cur_pkt.stream_index,
1321 av_ts2str(cur_pkt.pts),
1322 av_ts2str(cur_pkt.dts),
1325 if (s->debug & FF_FDEBUG_TS)
1326 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1327 cur_pkt.stream_index,
1328 av_ts2str(cur_pkt.pts),
1329 av_ts2str(cur_pkt.dts),
1334 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1335 st->parser = av_parser_init(st->codec->codec_id);
1337 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1338 "%s, packets or times may be invalid.\n",
1339 avcodec_get_name(st->codec->codec_id));
1340 /* no parser available: just output the raw packets */
1341 st->need_parsing = AVSTREAM_PARSE_NONE;
1342 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1343 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1344 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1345 st->parser->flags |= PARSER_FLAG_ONCE;
1346 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1347 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1351 if (!st->need_parsing || !st->parser) {
1352 /* no parsing needed: we just output the packet as is */
1354 compute_pkt_fields(s, st, NULL, pkt);
1355 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1356 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1357 ff_reduce_index(s, st->index);
1358 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1361 } else if (st->discard < AVDISCARD_ALL) {
1362 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1366 av_free_packet(&cur_pkt);
1368 if (pkt->flags & AV_PKT_FLAG_KEY)
1369 st->skip_to_keyframe = 0;
1370 if (st->skip_to_keyframe) {
1371 av_free_packet(&cur_pkt);
1376 if (!got_packet && s->parse_queue)
1377 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1379 if(s->debug & FF_FDEBUG_TS)
1380 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1382 av_ts2str(pkt->pts),
1383 av_ts2str(pkt->dts),
1391 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1393 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1399 ret = s->packet_buffer ?
1400 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1401 read_frame_internal(s, pkt);
1408 AVPacketList *pktl = s->packet_buffer;
1411 AVPacket *next_pkt = &pktl->pkt;
1413 if (next_pkt->dts != AV_NOPTS_VALUE) {
1414 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1415 // last dts seen for this stream. if any of packets following
1416 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1417 int64_t last_dts = next_pkt->dts;
1418 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1419 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1420 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1421 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1422 next_pkt->pts = pktl->pkt.dts;
1424 if (last_dts != AV_NOPTS_VALUE) {
1425 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1426 last_dts = pktl->pkt.dts;
1431 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1432 // Fixing the last reference frame had none pts issue (For MXF etc).
1433 // We only do this when
1435 // 2. we are not able to resolve a pts value for current packet.
1436 // 3. the packets for this stream at the end of the files had valid dts.
1437 next_pkt->pts = last_dts + next_pkt->duration;
1439 pktl = s->packet_buffer;
1442 /* read packet from packet buffer, if there is data */
1443 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1444 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1445 ret = read_from_packet_buffer(&s->packet_buffer,
1446 &s->packet_buffer_end, pkt);
1451 ret = read_frame_internal(s, pkt);
1453 if (pktl && ret != AVERROR(EAGAIN)) {
1460 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1461 &s->packet_buffer_end)) < 0)
1462 return AVERROR(ENOMEM);
1467 st = s->streams[pkt->stream_index];
1468 if (st->skip_samples) {
1469 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1470 AV_WL32(p, st->skip_samples);
1471 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1472 st->skip_samples = 0;
1475 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1476 ff_reduce_index(s, st->index);
1477 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1480 if (is_relative(pkt->dts))
1481 pkt->dts -= RELATIVE_TS_BASE;
1482 if (is_relative(pkt->pts))
1483 pkt->pts -= RELATIVE_TS_BASE;
1488 /* XXX: suppress the packet queue */
1489 static void flush_packet_queue(AVFormatContext *s)
1491 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1492 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1493 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1495 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1498 /*******************************************************/
1501 int av_find_default_stream_index(AVFormatContext *s)
1503 int first_audio_index = -1;
1507 if (s->nb_streams <= 0)
1509 for(i = 0; i < s->nb_streams; i++) {
1511 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1512 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1515 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1516 first_audio_index = i;
1518 return first_audio_index >= 0 ? first_audio_index : 0;
1522 * Flush the frame reader.
1524 void ff_read_frame_flush(AVFormatContext *s)
1529 flush_packet_queue(s);
1531 /* for each stream, reset read state */
1532 for(i = 0; i < s->nb_streams; i++) {
1536 av_parser_close(st->parser);
1539 st->last_IP_pts = AV_NOPTS_VALUE;
1540 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1541 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1542 st->reference_dts = AV_NOPTS_VALUE;
1544 st->probe_packets = MAX_PROBE_PACKETS;
1546 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1547 st->pts_buffer[j]= AV_NOPTS_VALUE;
1551 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1555 for(i = 0; i < s->nb_streams; i++) {
1556 AVStream *st = s->streams[i];
1558 st->cur_dts = av_rescale(timestamp,
1559 st->time_base.den * (int64_t)ref_st->time_base.num,
1560 st->time_base.num * (int64_t)ref_st->time_base.den);
1564 void ff_reduce_index(AVFormatContext *s, int stream_index)
1566 AVStream *st= s->streams[stream_index];
1567 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1569 if((unsigned)st->nb_index_entries >= max_entries){
1571 for(i=0; 2*i<st->nb_index_entries; i++)
1572 st->index_entries[i]= st->index_entries[2*i];
1573 st->nb_index_entries= i;
1577 int ff_add_index_entry(AVIndexEntry **index_entries,
1578 int *nb_index_entries,
1579 unsigned int *index_entries_allocated_size,
1580 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1582 AVIndexEntry *entries, *ie;
1585 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1588 if(timestamp == AV_NOPTS_VALUE)
1589 return AVERROR(EINVAL);
1591 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1592 timestamp -= RELATIVE_TS_BASE;
1594 entries = av_fast_realloc(*index_entries,
1595 index_entries_allocated_size,
1596 (*nb_index_entries + 1) *
1597 sizeof(AVIndexEntry));
1601 *index_entries= entries;
1603 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1606 index= (*nb_index_entries)++;
1607 ie= &entries[index];
1608 assert(index==0 || ie[-1].timestamp < timestamp);
1610 ie= &entries[index];
1611 if(ie->timestamp != timestamp){
1612 if(ie->timestamp <= timestamp)
1614 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1615 (*nb_index_entries)++;
1616 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1617 distance= ie->min_distance;
1621 ie->timestamp = timestamp;
1622 ie->min_distance= distance;
1629 int av_add_index_entry(AVStream *st,
1630 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1632 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1633 &st->index_entries_allocated_size, pos,
1634 timestamp, size, distance, flags);
1637 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1638 int64_t wanted_timestamp, int flags)
1646 //optimize appending index entries at the end
1647 if(b && entries[b-1].timestamp < wanted_timestamp)
1652 timestamp = entries[m].timestamp;
1653 if(timestamp >= wanted_timestamp)
1655 if(timestamp <= wanted_timestamp)
1658 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1660 if(!(flags & AVSEEK_FLAG_ANY)){
1661 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1662 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1671 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1674 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1675 wanted_timestamp, flags);
1678 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1680 AVInputFormat *avif= s->iformat;
1681 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1682 int64_t ts_min, ts_max, ts;
1687 if (stream_index < 0)
1690 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1693 ts_min= AV_NOPTS_VALUE;
1694 pos_limit= -1; //gcc falsely says it may be uninitialized
1696 st= s->streams[stream_index];
1697 if(st->index_entries){
1700 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()
1701 index= FFMAX(index, 0);
1702 e= &st->index_entries[index];
1704 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1706 ts_min= e->timestamp;
1707 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1708 pos_min, av_ts2str(ts_min));
1713 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1714 assert(index < st->nb_index_entries);
1716 e= &st->index_entries[index];
1717 assert(e->timestamp >= target_ts);
1719 ts_max= e->timestamp;
1720 pos_limit= pos_max - e->min_distance;
1721 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1722 pos_max, pos_limit, av_ts2str(ts_max));
1726 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1731 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1734 ff_read_frame_flush(s);
1735 ff_update_cur_dts(s, st, ts);
1740 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1741 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1742 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1743 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1746 int64_t start_pos, filesize;
1749 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1751 if(ts_min == AV_NOPTS_VALUE){
1752 pos_min = s->data_offset;
1753 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1754 if (ts_min == AV_NOPTS_VALUE)
1758 if(ts_min >= target_ts){
1763 if(ts_max == AV_NOPTS_VALUE){
1765 filesize = avio_size(s->pb);
1766 pos_max = filesize - 1;
1769 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1771 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1772 if (ts_max == AV_NOPTS_VALUE)
1776 int64_t tmp_pos= pos_max + 1;
1777 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1778 if(tmp_ts == AV_NOPTS_VALUE)
1782 if(tmp_pos >= filesize)
1788 if(ts_max <= target_ts){
1793 if(ts_min > ts_max){
1795 }else if(ts_min == ts_max){
1800 while (pos_min < pos_limit) {
1801 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1802 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1803 assert(pos_limit <= pos_max);
1806 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1807 // interpolate position (better than dichotomy)
1808 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1809 + pos_min - approximate_keyframe_distance;
1810 }else if(no_change==1){
1811 // bisection, if interpolation failed to change min or max pos last time
1812 pos = (pos_min + pos_limit)>>1;
1814 /* linear search if bisection failed, can only happen if there
1815 are very few or no keyframes between min/max */
1820 else if(pos > pos_limit)
1824 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1829 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1830 pos_min, pos, pos_max,
1831 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1832 pos_limit, start_pos, no_change);
1833 if(ts == AV_NOPTS_VALUE){
1834 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1837 assert(ts != AV_NOPTS_VALUE);
1838 if (target_ts <= ts) {
1839 pos_limit = start_pos - 1;
1843 if (target_ts >= ts) {
1849 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1850 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1853 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1855 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1856 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1857 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1863 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1864 int64_t pos_min, pos_max;
1866 pos_min = s->data_offset;
1867 pos_max = avio_size(s->pb) - 1;
1869 if (pos < pos_min) pos= pos_min;
1870 else if(pos > pos_max) pos= pos_max;
1872 avio_seek(s->pb, pos, SEEK_SET);
1877 static int seek_frame_generic(AVFormatContext *s,
1878 int stream_index, int64_t timestamp, int flags)
1885 st = s->streams[stream_index];
1887 index = av_index_search_timestamp(st, timestamp, flags);
1889 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1892 if(index < 0 || index==st->nb_index_entries-1){
1896 if(st->nb_index_entries){
1897 assert(st->index_entries);
1898 ie= &st->index_entries[st->nb_index_entries-1];
1899 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1901 ff_update_cur_dts(s, st, ie->timestamp);
1903 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1909 read_status = av_read_frame(s, &pkt);
1910 } while (read_status == AVERROR(EAGAIN));
1911 if (read_status < 0)
1913 av_free_packet(&pkt);
1914 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1915 if(pkt.flags & AV_PKT_FLAG_KEY)
1917 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1918 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);
1923 index = av_index_search_timestamp(st, timestamp, flags);
1928 ff_read_frame_flush(s);
1929 if (s->iformat->read_seek){
1930 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1933 ie = &st->index_entries[index];
1934 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1936 ff_update_cur_dts(s, st, ie->timestamp);
1941 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1942 int64_t timestamp, int flags)
1947 if (flags & AVSEEK_FLAG_BYTE) {
1948 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1950 ff_read_frame_flush(s);
1951 return seek_frame_byte(s, stream_index, timestamp, flags);
1954 if(stream_index < 0){
1955 stream_index= av_find_default_stream_index(s);
1956 if(stream_index < 0)
1959 st= s->streams[stream_index];
1960 /* timestamp for default must be expressed in AV_TIME_BASE units */
1961 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1964 /* first, we try the format specific seek */
1965 if (s->iformat->read_seek) {
1966 ff_read_frame_flush(s);
1967 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1974 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1975 ff_read_frame_flush(s);
1976 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1977 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1978 ff_read_frame_flush(s);
1979 return seek_frame_generic(s, stream_index, timestamp, flags);
1985 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1987 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1990 avformat_queue_attached_pictures(s);
1995 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1997 if(min_ts > ts || max_ts < ts)
2000 if (s->iformat->read_seek2) {
2002 ff_read_frame_flush(s);
2003 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2006 avformat_queue_attached_pictures(s);
2010 if(s->iformat->read_timestamp){
2011 //try to seek via read_timestamp()
2014 //Fallback to old API if new is not implemented but old is
2015 //Note the old has somewhat different semantics
2016 if (s->iformat->read_seek || 1) {
2017 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2018 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2019 if (ret<0 && ts != min_ts && max_ts != ts) {
2020 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2022 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2027 // try some generic seek like seek_frame_generic() but with new ts semantics
2030 /*******************************************************/
2033 * Return TRUE if the stream has accurate duration in any stream.
2035 * @return TRUE if the stream has accurate duration for at least one component.
2037 static int has_duration(AVFormatContext *ic)
2042 for(i = 0;i < ic->nb_streams; i++) {
2043 st = ic->streams[i];
2044 if (st->duration != AV_NOPTS_VALUE)
2047 if (ic->duration != AV_NOPTS_VALUE)
2053 * Estimate the stream timings from the one of each components.
2055 * Also computes the global bitrate if possible.
2057 static void update_stream_timings(AVFormatContext *ic)
2059 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2060 int64_t duration, duration1, filesize;
2065 start_time = INT64_MAX;
2066 start_time_text = INT64_MAX;
2067 end_time = INT64_MIN;
2068 duration = INT64_MIN;
2069 for(i = 0;i < ic->nb_streams; i++) {
2070 st = ic->streams[i];
2071 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2072 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2073 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2074 if (start_time1 < start_time_text)
2075 start_time_text = start_time1;
2077 start_time = FFMIN(start_time, start_time1);
2078 end_time1 = AV_NOPTS_VALUE;
2079 if (st->duration != AV_NOPTS_VALUE) {
2080 end_time1 = start_time1
2081 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2082 end_time = FFMAX(end_time, end_time1);
2084 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2085 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2086 p->start_time = start_time1;
2087 if(p->end_time < end_time1)
2088 p->end_time = end_time1;
2091 if (st->duration != AV_NOPTS_VALUE) {
2092 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2093 duration = FFMAX(duration, duration1);
2096 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2097 start_time = start_time_text;
2098 else if(start_time > start_time_text)
2099 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2101 if (start_time != INT64_MAX) {
2102 ic->start_time = start_time;
2103 if (end_time != INT64_MIN) {
2104 if (ic->nb_programs) {
2105 for (i=0; i<ic->nb_programs; i++) {
2106 p = ic->programs[i];
2107 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2108 duration = FFMAX(duration, p->end_time - p->start_time);
2111 duration = FFMAX(duration, end_time - start_time);
2114 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2115 ic->duration = duration;
2117 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2118 /* compute the bitrate */
2119 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2120 (double)ic->duration;
2124 static void fill_all_stream_timings(AVFormatContext *ic)
2129 update_stream_timings(ic);
2130 for(i = 0;i < ic->nb_streams; i++) {
2131 st = ic->streams[i];
2132 if (st->start_time == AV_NOPTS_VALUE) {
2133 if(ic->start_time != AV_NOPTS_VALUE)
2134 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2135 if(ic->duration != AV_NOPTS_VALUE)
2136 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2141 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2143 int64_t filesize, duration;
2147 /* if bit_rate is already set, we believe it */
2148 if (ic->bit_rate <= 0) {
2150 for(i=0;i<ic->nb_streams;i++) {
2151 st = ic->streams[i];
2152 if (st->codec->bit_rate > 0)
2153 bit_rate += st->codec->bit_rate;
2155 ic->bit_rate = bit_rate;
2158 /* if duration is already set, we believe it */
2159 if (ic->duration == AV_NOPTS_VALUE &&
2160 ic->bit_rate != 0) {
2161 filesize = ic->pb ? avio_size(ic->pb) : 0;
2163 for(i = 0; i < ic->nb_streams; i++) {
2164 st = ic->streams[i];
2165 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2166 if (st->duration == AV_NOPTS_VALUE)
2167 st->duration = duration;
2173 #define DURATION_MAX_READ_SIZE 250000LL
2174 #define DURATION_MAX_RETRY 4
2176 /* only usable for MPEG-PS streams */
2177 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2179 AVPacket pkt1, *pkt = &pkt1;
2181 int read_size, i, ret;
2183 int64_t filesize, offset, duration;
2186 /* flush packet queue */
2187 flush_packet_queue(ic);
2189 for (i=0; i<ic->nb_streams; i++) {
2190 st = ic->streams[i];
2191 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2192 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2195 av_parser_close(st->parser);
2200 /* estimate the end time (duration) */
2201 /* XXX: may need to support wrapping */
2202 filesize = ic->pb ? avio_size(ic->pb) : 0;
2203 end_time = AV_NOPTS_VALUE;
2205 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2209 avio_seek(ic->pb, offset, SEEK_SET);
2212 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2216 ret = ff_read_packet(ic, pkt);
2217 } while(ret == AVERROR(EAGAIN));
2220 read_size += pkt->size;
2221 st = ic->streams[pkt->stream_index];
2222 if (pkt->pts != AV_NOPTS_VALUE &&
2223 (st->start_time != AV_NOPTS_VALUE ||
2224 st->first_dts != AV_NOPTS_VALUE)) {
2225 duration = end_time = pkt->pts;
2226 if (st->start_time != AV_NOPTS_VALUE)
2227 duration -= st->start_time;
2229 duration -= st->first_dts;
2231 duration += 1LL<<st->pts_wrap_bits;
2233 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2234 st->duration = duration;
2237 av_free_packet(pkt);
2239 }while( end_time==AV_NOPTS_VALUE
2240 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2241 && ++retry <= DURATION_MAX_RETRY);
2243 fill_all_stream_timings(ic);
2245 avio_seek(ic->pb, old_offset, SEEK_SET);
2246 for (i=0; i<ic->nb_streams; i++) {
2248 st->cur_dts= st->first_dts;
2249 st->last_IP_pts = AV_NOPTS_VALUE;
2250 st->reference_dts = AV_NOPTS_VALUE;
2254 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2258 /* get the file size, if possible */
2259 if (ic->iformat->flags & AVFMT_NOFILE) {
2262 file_size = avio_size(ic->pb);
2263 file_size = FFMAX(0, file_size);
2266 if ((!strcmp(ic->iformat->name, "mpeg") ||
2267 !strcmp(ic->iformat->name, "mpegts")) &&
2268 file_size && ic->pb->seekable) {
2269 /* get accurate estimate from the PTSes */
2270 estimate_timings_from_pts(ic, old_offset);
2271 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2272 } else if (has_duration(ic)) {
2273 /* at least one component has timings - we use them for all
2275 fill_all_stream_timings(ic);
2276 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2278 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2279 /* less precise: use bitrate info */
2280 estimate_timings_from_bit_rate(ic);
2281 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2283 update_stream_timings(ic);
2287 AVStream av_unused *st;
2288 for(i = 0;i < ic->nb_streams; i++) {
2289 st = ic->streams[i];
2290 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2291 (double) st->start_time / AV_TIME_BASE,
2292 (double) st->duration / AV_TIME_BASE);
2294 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2295 (double) ic->start_time / AV_TIME_BASE,
2296 (double) ic->duration / AV_TIME_BASE,
2297 ic->bit_rate / 1000);
2301 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2303 AVCodecContext *avctx = st->codec;
2305 #define FAIL(errmsg) do { \
2307 *errmsg_ptr = errmsg; \
2311 switch (avctx->codec_type) {
2312 case AVMEDIA_TYPE_AUDIO:
2313 if (!avctx->frame_size && determinable_frame_size(avctx))
2314 FAIL("unspecified frame size");
2315 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2316 FAIL("unspecified sample format");
2317 if (!avctx->sample_rate)
2318 FAIL("unspecified sample rate");
2319 if (!avctx->channels)
2320 FAIL("unspecified number of channels");
2321 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2322 FAIL("no decodable DTS frames");
2324 case AVMEDIA_TYPE_VIDEO:
2326 FAIL("unspecified size");
2327 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2328 FAIL("unspecified pixel format");
2330 case AVMEDIA_TYPE_SUBTITLE:
2331 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2332 FAIL("unspecified size");
2334 case AVMEDIA_TYPE_DATA:
2335 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2338 if (avctx->codec_id == AV_CODEC_ID_NONE)
2339 FAIL("unknown codec");
2343 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2344 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2346 const AVCodec *codec;
2347 int got_picture = 1, ret = 0;
2348 AVFrame *frame = avcodec_alloc_frame();
2349 AVSubtitle subtitle;
2350 AVPacket pkt = *avpkt;
2353 return AVERROR(ENOMEM);
2355 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2356 AVDictionary *thread_opt = NULL;
2358 codec = st->codec->codec ? st->codec->codec :
2359 avcodec_find_decoder(st->codec->codec_id);
2362 st->info->found_decoder = -1;
2367 /* force thread count to 1 since the h264 decoder will not extract SPS
2368 * and PPS to extradata during multi-threaded decoding */
2369 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2370 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2372 av_dict_free(&thread_opt);
2374 st->info->found_decoder = -1;
2377 st->info->found_decoder = 1;
2378 } else if (!st->info->found_decoder)
2379 st->info->found_decoder = 1;
2381 if (st->info->found_decoder < 0) {
2386 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2388 (!has_codec_parameters(st, NULL) ||
2389 !has_decode_delay_been_guessed(st) ||
2390 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2392 avcodec_get_frame_defaults(frame);
2393 switch(st->codec->codec_type) {
2394 case AVMEDIA_TYPE_VIDEO:
2395 ret = avcodec_decode_video2(st->codec, frame,
2396 &got_picture, &pkt);
2398 case AVMEDIA_TYPE_AUDIO:
2399 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2401 case AVMEDIA_TYPE_SUBTITLE:
2402 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2403 &got_picture, &pkt);
2411 st->nb_decoded_frames++;
2418 if(!pkt.data && !got_picture)
2422 avcodec_free_frame(&frame);
2426 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2428 while (tags->id != AV_CODEC_ID_NONE) {
2436 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2439 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2440 if(tag == tags[i].tag)
2443 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2444 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2447 return AV_CODEC_ID_NONE;
2450 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2454 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2455 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2456 default: return AV_CODEC_ID_NONE;
2461 if (sflags & (1 << (bps - 1))) {
2463 case 1: return AV_CODEC_ID_PCM_S8;
2464 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2465 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2466 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2467 default: return AV_CODEC_ID_NONE;
2471 case 1: return AV_CODEC_ID_PCM_U8;
2472 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2473 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2474 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2475 default: return AV_CODEC_ID_NONE;
2481 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2484 for(i=0; tags && tags[i]; i++){
2485 int tag= ff_codec_get_tag(tags[i], id);
2491 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2494 for(i=0; tags && tags[i]; i++){
2495 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2496 if(id!=AV_CODEC_ID_NONE) return id;
2498 return AV_CODEC_ID_NONE;
2501 static void compute_chapters_end(AVFormatContext *s)
2504 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2506 for (i = 0; i < s->nb_chapters; i++)
2507 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2508 AVChapter *ch = s->chapters[i];
2509 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2512 for (j = 0; j < s->nb_chapters; j++) {
2513 AVChapter *ch1 = s->chapters[j];
2514 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2515 if (j != i && next_start > ch->start && next_start < end)
2518 ch->end = (end == INT64_MAX) ? ch->start : end;
2522 static int get_std_framerate(int i){
2523 if(i<60*12) return (i+1)*1001;
2524 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2528 * Is the time base unreliable.
2529 * This is a heuristic to balance between quick acceptance of the values in
2530 * the headers vs. some extra checks.
2531 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2532 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2533 * And there are "variable" fps files this needs to detect as well.
2535 static int tb_unreliable(AVCodecContext *c){
2536 if( c->time_base.den >= 101L*c->time_base.num
2537 || c->time_base.den < 5L*c->time_base.num
2538 /* || c->codec_tag == AV_RL32("DIVX")
2539 || c->codec_tag == AV_RL32("XVID")*/
2540 || c->codec_tag == AV_RL32("mp4v")
2541 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2542 || c->codec_id == AV_CODEC_ID_H264
2548 #if FF_API_FORMAT_PARAMETERS
2549 int av_find_stream_info(AVFormatContext *ic)
2551 return avformat_find_stream_info(ic, NULL);
2555 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2557 int i, count, ret, read_size, j;
2559 AVPacket pkt1, *pkt;
2560 int64_t old_offset = avio_tell(ic->pb);
2561 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2562 int flush_codecs = ic->probesize > 0;
2565 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2567 for(i=0;i<ic->nb_streams;i++) {
2568 const AVCodec *codec;
2569 AVDictionary *thread_opt = NULL;
2570 st = ic->streams[i];
2572 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2573 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2574 /* if(!st->time_base.num)
2576 if(!st->codec->time_base.num)
2577 st->codec->time_base= st->time_base;
2579 //only for the split stuff
2580 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2581 st->parser = av_parser_init(st->codec->codec_id);
2583 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2584 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2585 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2586 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2588 } else if (st->need_parsing) {
2589 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2590 "%s, packets or times may be invalid.\n",
2591 avcodec_get_name(st->codec->codec_id));
2594 codec = st->codec->codec ? st->codec->codec :
2595 avcodec_find_decoder(st->codec->codec_id);
2597 /* force thread count to 1 since the h264 decoder will not extract SPS
2598 * and PPS to extradata during multi-threaded decoding */
2599 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2601 /* Ensure that subtitle_header is properly set. */
2602 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2603 && codec && !st->codec->codec)
2604 avcodec_open2(st->codec, codec, options ? &options[i]
2607 //try to just open decoders, in case this is enough to get parameters
2608 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2609 if (codec && !st->codec->codec)
2610 avcodec_open2(st->codec, codec, options ? &options[i]
2614 av_dict_free(&thread_opt);
2617 for (i=0; i<ic->nb_streams; i++) {
2618 #if FF_API_R_FRAME_RATE
2619 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2621 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2622 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2628 if (ff_check_interrupt(&ic->interrupt_callback)){
2630 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2634 /* check if one codec still needs to be handled */
2635 for(i=0;i<ic->nb_streams;i++) {
2636 int fps_analyze_framecount = 20;
2638 st = ic->streams[i];
2639 if (!has_codec_parameters(st, NULL))
2641 /* if the timebase is coarse (like the usual millisecond precision
2642 of mkv), we need to analyze more frames to reliably arrive at
2644 if (av_q2d(st->time_base) > 0.0005)
2645 fps_analyze_framecount *= 2;
2646 if (ic->fps_probe_size >= 0)
2647 fps_analyze_framecount = ic->fps_probe_size;
2648 /* variable fps and no guess at the real fps */
2649 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2650 && st->info->duration_count < fps_analyze_framecount
2651 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2653 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2655 if (st->first_dts == AV_NOPTS_VALUE &&
2656 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2657 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2660 if (i == ic->nb_streams) {
2661 /* NOTE: if the format has no header, then we need to read
2662 some packets to get most of the streams, so we cannot
2664 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2665 /* if we found the info for all the codecs, we can stop */
2667 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2672 /* we did not get all the codec info, but we read too much data */
2673 if (read_size >= ic->probesize) {
2675 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2676 for (i = 0; i < ic->nb_streams; i++)
2677 if (!ic->streams[i]->r_frame_rate.num &&
2678 ic->streams[i]->info->duration_count <= 1)
2679 av_log(ic, AV_LOG_WARNING,
2680 "Stream #%d: not enough frames to estimate rate; "
2681 "consider increasing probesize\n", i);
2685 /* NOTE: a new stream can be added there if no header in file
2686 (AVFMTCTX_NOHEADER) */
2687 ret = read_frame_internal(ic, &pkt1);
2688 if (ret == AVERROR(EAGAIN))
2696 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2699 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2700 &ic->packet_buffer_end);
2701 if ((ret = av_dup_packet(pkt)) < 0)
2702 goto find_stream_info_err;
2705 read_size += pkt->size;
2707 st = ic->streams[pkt->stream_index];
2708 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2709 /* check for non-increasing dts */
2710 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2711 st->info->fps_last_dts >= pkt->dts) {
2712 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2713 "packet %d with DTS %"PRId64", packet %d with DTS "
2714 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2715 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2716 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2718 /* check for a discontinuity in dts - if the difference in dts
2719 * is more than 1000 times the average packet duration in the sequence,
2720 * we treat it as a discontinuity */
2721 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2722 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2723 (pkt->dts - st->info->fps_last_dts) / 1000 >
2724 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2725 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2726 "packet %d with DTS %"PRId64", packet %d with DTS "
2727 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2728 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2729 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2732 /* update stored dts values */
2733 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2734 st->info->fps_first_dts = pkt->dts;
2735 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2737 st->info->fps_last_dts = pkt->dts;
2738 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2740 if (st->codec_info_nb_frames>1) {
2742 if (st->time_base.den > 0)
2743 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2744 if (st->avg_frame_rate.num > 0)
2745 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2747 if (t >= ic->max_analyze_duration) {
2748 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2751 if (pkt->duration) {
2752 st->info->codec_info_duration += pkt->duration;
2753 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2756 #if FF_API_R_FRAME_RATE
2758 int64_t last = st->info->last_dts;
2760 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2761 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2762 int64_t duration= pkt->dts - last;
2764 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2765 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2766 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2767 int framerate= get_std_framerate(i);
2768 double sdts= dts*framerate/(1001*12);
2770 int64_t ticks= llrint(sdts+j*0.5);
2771 double error= sdts - ticks + j*0.5;
2772 st->info->duration_error[j][0][i] += error;
2773 st->info->duration_error[j][1][i] += error*error;
2776 st->info->duration_count++;
2777 // ignore the first 4 values, they might have some random jitter
2778 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2779 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2781 if (pkt->dts != AV_NOPTS_VALUE)
2782 st->info->last_dts = pkt->dts;
2785 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2786 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2787 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2788 st->codec->extradata_size= i;
2789 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2790 if (!st->codec->extradata)
2791 return AVERROR(ENOMEM);
2792 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2793 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2797 /* if still no information, we try to open the codec and to
2798 decompress the frame. We try to avoid that in most cases as
2799 it takes longer and uses more memory. For MPEG-4, we need to
2800 decompress for QuickTime.
2802 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2803 least one frame of codec data, this makes sure the codec initializes
2804 the channel configuration and does not only trust the values from the container.
2806 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2808 st->codec_info_nb_frames++;
2813 AVPacket empty_pkt = { 0 };
2815 av_init_packet(&empty_pkt);
2817 ret = -1; /* we could not have all the codec parameters before EOF */
2818 for(i=0;i<ic->nb_streams;i++) {
2821 st = ic->streams[i];
2823 /* flush the decoders */
2824 if (st->info->found_decoder == 1) {
2826 err = try_decode_frame(st, &empty_pkt,
2827 (options && i < orig_nb_streams) ?
2828 &options[i] : NULL);
2829 } while (err > 0 && !has_codec_parameters(st, NULL));
2832 av_log(ic, AV_LOG_INFO,
2833 "decoding for stream %d failed\n", st->index);
2837 if (!has_codec_parameters(st, &errmsg)) {
2839 avcodec_string(buf, sizeof(buf), st->codec, 0);
2840 av_log(ic, AV_LOG_WARNING,
2841 "Could not find codec parameters for stream %d (%s): %s\n"
2842 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2850 // close codecs which were opened in try_decode_frame()
2851 for(i=0;i<ic->nb_streams;i++) {
2852 st = ic->streams[i];
2853 avcodec_close(st->codec);
2855 for(i=0;i<ic->nb_streams;i++) {
2856 st = ic->streams[i];
2857 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2858 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2859 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2860 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2861 st->codec->codec_tag= tag;
2864 /* estimate average framerate if not set by demuxer */
2865 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2867 double best_error = 0.01;
2869 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2870 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2871 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2873 /* round guessed framerate to a "standard" framerate if it's
2874 * within 1% of the original estimate*/
2875 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2876 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2877 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2879 if (error < best_error) {
2881 best_fps = std_fps.num;
2885 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2886 best_fps, 12*1001, INT_MAX);
2889 // the check for tb_unreliable() is not completely correct, since this is not about handling
2890 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2891 // ipmovie.c produces.
2892 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)
2893 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);
2894 if (st->info->duration_count>1 && !st->r_frame_rate.num
2895 && tb_unreliable(st->codec)) {
2897 double best_error= 0.01;
2899 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2902 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2904 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2907 int n= st->info->duration_count;
2908 double a= st->info->duration_error[k][0][j] / n;
2909 double error= st->info->duration_error[k][1][j]/n - a*a;
2911 if(error < best_error && best_error> 0.000000001){
2913 num = get_std_framerate(j);
2916 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2919 // do not increase frame rate by more than 1 % in order to match a standard rate.
2920 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2921 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2924 if (!st->r_frame_rate.num){
2925 if( st->codec->time_base.den * (int64_t)st->time_base.num
2926 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2927 st->r_frame_rate.num = st->codec->time_base.den;
2928 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2930 st->r_frame_rate.num = st->time_base.den;
2931 st->r_frame_rate.den = st->time_base.num;
2934 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2935 if(!st->codec->bits_per_coded_sample)
2936 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2937 // set stream disposition based on audio service type
2938 switch (st->codec->audio_service_type) {
2939 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2940 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2941 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2942 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2943 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2944 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2945 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2946 st->disposition = AV_DISPOSITION_COMMENT; break;
2947 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2948 st->disposition = AV_DISPOSITION_KARAOKE; break;
2954 estimate_timings(ic, old_offset);
2956 compute_chapters_end(ic);
2958 find_stream_info_err:
2959 for (i=0; i < ic->nb_streams; i++) {
2960 if (ic->streams[i]->codec)
2961 ic->streams[i]->codec->thread_count = 0;
2962 av_freep(&ic->streams[i]->info);
2965 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2969 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2973 for (i = 0; i < ic->nb_programs; i++) {
2974 if (ic->programs[i] == last) {
2978 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2979 if (ic->programs[i]->stream_index[j] == s)
2980 return ic->programs[i];
2986 int av_find_best_stream(AVFormatContext *ic,
2987 enum AVMediaType type,
2988 int wanted_stream_nb,
2990 AVCodec **decoder_ret,
2993 int i, nb_streams = ic->nb_streams;
2994 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
2995 unsigned *program = NULL;
2996 AVCodec *decoder = NULL, *best_decoder = NULL;
2998 if (related_stream >= 0 && wanted_stream_nb < 0) {
2999 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3001 program = p->stream_index;
3002 nb_streams = p->nb_stream_indexes;
3005 for (i = 0; i < nb_streams; i++) {
3006 int real_stream_index = program ? program[i] : i;
3007 AVStream *st = ic->streams[real_stream_index];
3008 AVCodecContext *avctx = st->codec;
3009 if (avctx->codec_type != type)
3011 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3013 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3016 decoder = avcodec_find_decoder(st->codec->codec_id);
3019 ret = AVERROR_DECODER_NOT_FOUND;
3023 count = st->codec_info_nb_frames;
3024 bitrate = avctx->bit_rate;
3025 multiframe = FFMIN(5, count);
3026 if ((best_multiframe > multiframe) ||
3027 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3028 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3031 best_bitrate = bitrate;
3032 best_multiframe = multiframe;
3033 ret = real_stream_index;
3034 best_decoder = decoder;
3035 if (program && i == nb_streams - 1 && ret < 0) {
3037 nb_streams = ic->nb_streams;
3038 i = 0; /* no related stream found, try again with everything */
3042 *decoder_ret = best_decoder;
3046 /*******************************************************/
3048 int av_read_play(AVFormatContext *s)
3050 if (s->iformat->read_play)
3051 return s->iformat->read_play(s);
3053 return avio_pause(s->pb, 0);
3054 return AVERROR(ENOSYS);
3057 int av_read_pause(AVFormatContext *s)
3059 if (s->iformat->read_pause)
3060 return s->iformat->read_pause(s);
3062 return avio_pause(s->pb, 1);
3063 return AVERROR(ENOSYS);
3066 void ff_free_stream(AVFormatContext *s, AVStream *st){
3067 av_assert0(s->nb_streams>0);
3068 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3071 av_parser_close(st->parser);
3073 if (st->attached_pic.data)
3074 av_free_packet(&st->attached_pic);
3075 av_dict_free(&st->metadata);
3076 av_freep(&st->index_entries);
3077 av_freep(&st->codec->extradata);
3078 av_freep(&st->codec->subtitle_header);
3079 av_freep(&st->codec);
3080 av_freep(&st->priv_data);
3081 av_freep(&st->info);
3082 av_freep(&st->probe_data.buf);
3083 av_freep(&s->streams[ --s->nb_streams ]);
3086 void avformat_free_context(AVFormatContext *s)
3094 if (s->iformat && s->iformat->priv_class && s->priv_data)
3095 av_opt_free(s->priv_data);
3097 for(i=s->nb_streams-1; i>=0; i--) {
3098 ff_free_stream(s, s->streams[i]);
3100 for(i=s->nb_programs-1; i>=0; i--) {
3101 av_dict_free(&s->programs[i]->metadata);
3102 av_freep(&s->programs[i]->stream_index);
3103 av_freep(&s->programs[i]);
3105 av_freep(&s->programs);
3106 av_freep(&s->priv_data);
3107 while(s->nb_chapters--) {
3108 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3109 av_freep(&s->chapters[s->nb_chapters]);
3111 av_freep(&s->chapters);
3112 av_dict_free(&s->metadata);
3113 av_freep(&s->streams);
3117 #if FF_API_CLOSE_INPUT_FILE
3118 void av_close_input_file(AVFormatContext *s)
3120 avformat_close_input(&s);
3124 void avformat_close_input(AVFormatContext **ps)
3126 AVFormatContext *s = *ps;
3127 AVIOContext *pb = s->pb;
3129 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3130 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3133 flush_packet_queue(s);
3136 if (s->iformat->read_close)
3137 s->iformat->read_close(s);
3140 avformat_free_context(s);
3147 #if FF_API_NEW_STREAM
3148 AVStream *av_new_stream(AVFormatContext *s, int id)
3150 AVStream *st = avformat_new_stream(s, NULL);
3157 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3163 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3165 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3168 s->streams = streams;
3170 st = av_mallocz(sizeof(AVStream));
3173 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3177 st->info->last_dts = AV_NOPTS_VALUE;
3179 st->codec = avcodec_alloc_context3(c);
3181 /* no default bitrate if decoding */
3182 st->codec->bit_rate = 0;
3184 st->index = s->nb_streams;
3185 st->start_time = AV_NOPTS_VALUE;
3186 st->duration = AV_NOPTS_VALUE;
3187 /* we set the current DTS to 0 so that formats without any timestamps
3188 but durations get some timestamps, formats with some unknown
3189 timestamps have their first few packets buffered and the
3190 timestamps corrected before they are returned to the user */
3191 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3192 st->first_dts = AV_NOPTS_VALUE;
3193 st->probe_packets = MAX_PROBE_PACKETS;
3195 /* default pts setting is MPEG-like */
3196 avpriv_set_pts_info(st, 33, 1, 90000);
3197 st->last_IP_pts = AV_NOPTS_VALUE;
3198 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3199 st->pts_buffer[i]= AV_NOPTS_VALUE;
3200 st->reference_dts = AV_NOPTS_VALUE;
3202 st->sample_aspect_ratio = (AVRational){0,1};
3204 #if FF_API_R_FRAME_RATE
3205 st->info->last_dts = AV_NOPTS_VALUE;
3207 st->info->fps_first_dts = AV_NOPTS_VALUE;
3208 st->info->fps_last_dts = AV_NOPTS_VALUE;
3210 s->streams[s->nb_streams++] = st;
3214 AVProgram *av_new_program(AVFormatContext *ac, int id)
3216 AVProgram *program=NULL;
3219 av_dlog(ac, "new_program: id=0x%04x\n", id);
3221 for(i=0; i<ac->nb_programs; i++)
3222 if(ac->programs[i]->id == id)
3223 program = ac->programs[i];
3226 program = av_mallocz(sizeof(AVProgram));
3229 dynarray_add(&ac->programs, &ac->nb_programs, program);
3230 program->discard = AVDISCARD_NONE;
3234 program->start_time =
3235 program->end_time = AV_NOPTS_VALUE;
3240 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3242 AVChapter *chapter = NULL;
3245 for(i=0; i<s->nb_chapters; i++)
3246 if(s->chapters[i]->id == id)
3247 chapter = s->chapters[i];
3250 chapter= av_mallocz(sizeof(AVChapter));
3253 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3255 av_dict_set(&chapter->metadata, "title", title, 0);
3257 chapter->time_base= time_base;
3258 chapter->start = start;
3264 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3267 AVProgram *program=NULL;
3270 if (idx >= ac->nb_streams) {
3271 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3275 for(i=0; i<ac->nb_programs; i++){
3276 if(ac->programs[i]->id != progid)
3278 program = ac->programs[i];
3279 for(j=0; j<program->nb_stream_indexes; j++)
3280 if(program->stream_index[j] == idx)
3283 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3286 program->stream_index = tmp;
3287 program->stream_index[program->nb_stream_indexes++] = idx;
3292 static void print_fps(double d, const char *postfix){
3293 uint64_t v= lrintf(d*100);
3294 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3295 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3296 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3299 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3301 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3302 AVDictionaryEntry *tag=NULL;
3304 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3305 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3306 if(strcmp("language", tag->key)){
3307 const char *p = tag->value;
3308 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3311 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3312 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3313 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3315 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3316 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3319 av_log(ctx, AV_LOG_INFO, "\n");
3325 /* "user interface" functions */
3326 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3329 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3330 AVStream *st = ic->streams[i];
3331 int g = av_gcd(st->time_base.num, st->time_base.den);
3332 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3333 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3334 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3335 /* the pid is an important information, so we display it */
3336 /* XXX: add a generic system */
3337 if (flags & AVFMT_SHOW_IDS)
3338 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3340 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3341 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3342 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3343 if (st->sample_aspect_ratio.num && // default
3344 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3345 AVRational display_aspect_ratio;
3346 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3347 st->codec->width*st->sample_aspect_ratio.num,
3348 st->codec->height*st->sample_aspect_ratio.den,
3350 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3351 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3352 display_aspect_ratio.num, display_aspect_ratio.den);
3354 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3355 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3356 print_fps(av_q2d(st->avg_frame_rate), "fps");
3357 #if FF_API_R_FRAME_RATE
3358 if(st->r_frame_rate.den && st->r_frame_rate.num)
3359 print_fps(av_q2d(st->r_frame_rate), "tbr");
3361 if(st->time_base.den && st->time_base.num)
3362 print_fps(1/av_q2d(st->time_base), "tbn");
3363 if(st->codec->time_base.den && st->codec->time_base.num)
3364 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3366 if (st->disposition & AV_DISPOSITION_DEFAULT)
3367 av_log(NULL, AV_LOG_INFO, " (default)");
3368 if (st->disposition & AV_DISPOSITION_DUB)
3369 av_log(NULL, AV_LOG_INFO, " (dub)");
3370 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3371 av_log(NULL, AV_LOG_INFO, " (original)");
3372 if (st->disposition & AV_DISPOSITION_COMMENT)
3373 av_log(NULL, AV_LOG_INFO, " (comment)");
3374 if (st->disposition & AV_DISPOSITION_LYRICS)
3375 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3376 if (st->disposition & AV_DISPOSITION_KARAOKE)
3377 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3378 if (st->disposition & AV_DISPOSITION_FORCED)
3379 av_log(NULL, AV_LOG_INFO, " (forced)");
3380 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3381 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3382 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3383 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3384 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3385 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3386 av_log(NULL, AV_LOG_INFO, "\n");
3387 dump_metadata(NULL, st->metadata, " ");
3390 void av_dump_format(AVFormatContext *ic,
3396 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3397 if (ic->nb_streams && !printed)
3400 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3401 is_output ? "Output" : "Input",
3403 is_output ? ic->oformat->name : ic->iformat->name,
3404 is_output ? "to" : "from", url);
3405 dump_metadata(NULL, ic->metadata, " ");
3407 av_log(NULL, AV_LOG_INFO, " Duration: ");
3408 if (ic->duration != AV_NOPTS_VALUE) {
3409 int hours, mins, secs, us;
3410 int64_t duration = ic->duration + 5000;
3411 secs = duration / AV_TIME_BASE;
3412 us = duration % AV_TIME_BASE;
3417 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3418 (100 * us) / AV_TIME_BASE);
3420 av_log(NULL, AV_LOG_INFO, "N/A");
3422 if (ic->start_time != AV_NOPTS_VALUE) {
3424 av_log(NULL, AV_LOG_INFO, ", start: ");
3425 secs = ic->start_time / AV_TIME_BASE;
3426 us = abs(ic->start_time % AV_TIME_BASE);
3427 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3428 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3430 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3432 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3434 av_log(NULL, AV_LOG_INFO, "N/A");
3436 av_log(NULL, AV_LOG_INFO, "\n");
3438 for (i = 0; i < ic->nb_chapters; i++) {
3439 AVChapter *ch = ic->chapters[i];
3440 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3441 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3442 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3444 dump_metadata(NULL, ch->metadata, " ");
3446 if(ic->nb_programs) {
3447 int j, k, total = 0;
3448 for(j=0; j<ic->nb_programs; j++) {
3449 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3451 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3452 name ? name->value : "");
3453 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3454 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3455 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3456 printed[ic->programs[j]->stream_index[k]] = 1;
3458 total += ic->programs[j]->nb_stream_indexes;
3460 if (total < ic->nb_streams)
3461 av_log(NULL, AV_LOG_INFO, " No Program\n");
3463 for(i=0;i<ic->nb_streams;i++)
3465 dump_stream_format(ic, i, index, is_output);
3470 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3471 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3473 return av_gettime();
3477 uint64_t ff_ntp_time(void)
3479 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3482 int av_get_frame_filename(char *buf, int buf_size,
3483 const char *path, int number)
3486 char *q, buf1[20], c;
3487 int nd, len, percentd_found;
3499 while (isdigit(*p)) {
3500 nd = nd * 10 + *p++ - '0';
3503 } while (isdigit(c));
3512 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3514 if ((q - buf + len) > buf_size - 1)
3516 memcpy(q, buf1, len);
3524 if ((q - buf) < buf_size - 1)
3528 if (!percentd_found)
3537 static void hex_dump_internal(void *avcl, FILE *f, int level,
3538 const uint8_t *buf, int size)
3541 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3543 for(i=0;i<size;i+=16) {
3550 PRINT(" %02x", buf[i+j]);
3555 for(j=0;j<len;j++) {
3557 if (c < ' ' || c > '~')
3566 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3568 hex_dump_internal(NULL, f, 0, buf, size);
3571 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3573 hex_dump_internal(avcl, NULL, level, buf, size);
3576 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3578 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3579 PRINT("stream #%d:\n", pkt->stream_index);
3580 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3581 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3582 /* DTS is _always_ valid after av_read_frame() */
3584 if (pkt->dts == AV_NOPTS_VALUE)
3587 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3588 /* PTS may not be known if B-frames are present. */
3590 if (pkt->pts == AV_NOPTS_VALUE)
3593 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3595 PRINT(" size=%d\n", pkt->size);
3598 av_hex_dump(f, pkt->data, pkt->size);
3602 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3604 AVRational tb = { 1, AV_TIME_BASE };
3605 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3609 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3611 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3615 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3617 AVRational tb = { 1, AV_TIME_BASE };
3618 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3622 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3625 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3628 void av_url_split(char *proto, int proto_size,
3629 char *authorization, int authorization_size,
3630 char *hostname, int hostname_size,
3632 char *path, int path_size,
3635 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3637 if (port_ptr) *port_ptr = -1;
3638 if (proto_size > 0) proto[0] = 0;
3639 if (authorization_size > 0) authorization[0] = 0;
3640 if (hostname_size > 0) hostname[0] = 0;
3641 if (path_size > 0) path[0] = 0;
3643 /* parse protocol */
3644 if ((p = strchr(url, ':'))) {
3645 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3650 /* no protocol means plain filename */
3651 av_strlcpy(path, url, path_size);
3655 /* separate path from hostname */
3656 ls = strchr(p, '/');
3657 ls2 = strchr(p, '?');
3661 ls = FFMIN(ls, ls2);
3663 av_strlcpy(path, ls, path_size);
3665 ls = &p[strlen(p)]; // XXX
3667 /* the rest is hostname, use that to parse auth/port */
3669 /* authorization (user[:pass]@hostname) */
3671 while ((at = strchr(p, '@')) && at < ls) {
3672 av_strlcpy(authorization, at2,
3673 FFMIN(authorization_size, at + 1 - at2));
3674 p = at + 1; /* skip '@' */
3677 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3679 av_strlcpy(hostname, p + 1,
3680 FFMIN(hostname_size, brk - p));
3681 if (brk[1] == ':' && port_ptr)
3682 *port_ptr = atoi(brk + 2);
3683 } else if ((col = strchr(p, ':')) && col < ls) {
3684 av_strlcpy(hostname, p,
3685 FFMIN(col + 1 - p, hostname_size));
3686 if (port_ptr) *port_ptr = atoi(col + 1);
3688 av_strlcpy(hostname, p,
3689 FFMIN(ls + 1 - p, hostname_size));
3693 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3696 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3699 'C', 'D', 'E', 'F' };
3700 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3703 'c', 'd', 'e', 'f' };
3704 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3706 for(i = 0; i < s; i++) {
3707 buff[i * 2] = hex_table[src[i] >> 4];
3708 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3714 int ff_hex_to_data(uint8_t *data, const char *p)
3721 p += strspn(p, SPACE_CHARS);
3724 c = toupper((unsigned char) *p++);
3725 if (c >= '0' && c <= '9')
3727 else if (c >= 'A' && c <= 'F')
3742 #if FF_API_SET_PTS_INFO
3743 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3744 unsigned int pts_num, unsigned int pts_den)
3746 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3750 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3751 unsigned int pts_num, unsigned int pts_den)
3754 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3755 if(new_tb.num != pts_num)
3756 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3758 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3760 if(new_tb.num <= 0 || new_tb.den <= 0) {
3761 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);
3764 s->time_base = new_tb;
3765 av_codec_set_pkt_timebase(s->codec, new_tb);
3766 s->pts_wrap_bits = pts_wrap_bits;
3769 int ff_url_join(char *str, int size, const char *proto,
3770 const char *authorization, const char *hostname,
3771 int port, const char *fmt, ...)
3774 struct addrinfo hints = { 0 }, *ai;
3779 av_strlcatf(str, size, "%s://", proto);
3780 if (authorization && authorization[0])
3781 av_strlcatf(str, size, "%s@", authorization);
3782 #if CONFIG_NETWORK && defined(AF_INET6)
3783 /* Determine if hostname is a numerical IPv6 address,
3784 * properly escape it within [] in that case. */
3785 hints.ai_flags = AI_NUMERICHOST;
3786 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3787 if (ai->ai_family == AF_INET6) {
3788 av_strlcat(str, "[", size);
3789 av_strlcat(str, hostname, size);
3790 av_strlcat(str, "]", size);
3792 av_strlcat(str, hostname, size);
3797 /* Not an IPv6 address, just output the plain string. */
3798 av_strlcat(str, hostname, size);
3801 av_strlcatf(str, size, ":%d", port);
3804 int len = strlen(str);
3807 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3813 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3814 AVFormatContext *src)
3819 local_pkt.stream_index = dst_stream;
3820 if (pkt->pts != AV_NOPTS_VALUE)
3821 local_pkt.pts = av_rescale_q(pkt->pts,
3822 src->streams[pkt->stream_index]->time_base,
3823 dst->streams[dst_stream]->time_base);
3824 if (pkt->dts != AV_NOPTS_VALUE)
3825 local_pkt.dts = av_rescale_q(pkt->dts,
3826 src->streams[pkt->stream_index]->time_base,
3827 dst->streams[dst_stream]->time_base);
3828 return av_write_frame(dst, &local_pkt);
3831 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3834 const char *ptr = str;
3836 /* Parse key=value pairs. */
3839 char *dest = NULL, *dest_end;
3840 int key_len, dest_len = 0;
3842 /* Skip whitespace and potential commas. */
3843 while (*ptr && (isspace(*ptr) || *ptr == ','))
3850 if (!(ptr = strchr(key, '=')))
3853 key_len = ptr - key;
3855 callback_get_buf(context, key, key_len, &dest, &dest_len);
3856 dest_end = dest + dest_len - 1;
3860 while (*ptr && *ptr != '\"') {
3864 if (dest && dest < dest_end)
3868 if (dest && dest < dest_end)
3876 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3877 if (dest && dest < dest_end)
3885 int ff_find_stream_index(AVFormatContext *s, int id)
3888 for (i = 0; i < s->nb_streams; i++) {
3889 if (s->streams[i]->id == id)
3895 void ff_make_absolute_url(char *buf, int size, const char *base,
3898 char *sep, *path_query;
3899 /* Absolute path, relative to the current server */
3900 if (base && strstr(base, "://") && rel[0] == '/') {
3902 av_strlcpy(buf, base, size);
3903 sep = strstr(buf, "://");
3905 /* Take scheme from base url */
3906 if (rel[1] == '/') {
3909 /* Take scheme and host from base url */
3911 sep = strchr(sep, '/');
3916 av_strlcat(buf, rel, size);
3919 /* If rel actually is an absolute url, just copy it */
3920 if (!base || strstr(rel, "://") || rel[0] == '/') {
3921 av_strlcpy(buf, rel, size);
3925 av_strlcpy(buf, base, size);
3927 /* Strip off any query string from base */
3928 path_query = strchr(buf, '?');
3929 if (path_query != NULL)
3932 /* Is relative path just a new query part? */
3933 if (rel[0] == '?') {
3934 av_strlcat(buf, rel, size);
3938 /* Remove the file name from the base url */
3939 sep = strrchr(buf, '/');
3944 while (av_strstart(rel, "../", NULL) && sep) {
3945 /* Remove the path delimiter at the end */
3947 sep = strrchr(buf, '/');
3948 /* If the next directory name to pop off is "..", break here */
3949 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3950 /* Readd the slash we just removed */
3951 av_strlcat(buf, "/", size);
3954 /* Cut off the directory name */
3961 av_strlcat(buf, rel, size);
3964 int64_t ff_iso8601_to_unix_time(const char *datestr)
3966 struct tm time1 = {0}, time2 = {0};
3968 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3969 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3971 return av_timegm(&time2);
3973 return av_timegm(&time1);
3976 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3979 if (ofmt->query_codec)
3980 return ofmt->query_codec(codec_id, std_compliance);
3981 else if (ofmt->codec_tag)
3982 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3983 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3984 codec_id == ofmt->subtitle_codec)
3987 return AVERROR_PATCHWELCOME;
3990 int avformat_network_init(void)
3994 ff_network_inited_globally = 1;
3995 if ((ret = ff_network_init()) < 0)
4002 int avformat_network_deinit(void)
4011 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4012 uint64_t channel_layout, int32_t sample_rate,
4013 int32_t width, int32_t height)
4019 return AVERROR(EINVAL);
4022 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4024 if (channel_layout) {
4026 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4030 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4032 if (width || height) {
4034 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4036 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4038 return AVERROR(ENOMEM);
4039 bytestream_put_le32(&data, flags);
4041 bytestream_put_le32(&data, channels);
4043 bytestream_put_le64(&data, channel_layout);
4045 bytestream_put_le32(&data, sample_rate);
4046 if (width || height) {
4047 bytestream_put_le32(&data, width);
4048 bytestream_put_le32(&data, height);
4053 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4055 return ff_codec_bmp_tags;
4057 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4059 return ff_codec_wav_tags;
4062 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4064 AVRational undef = {0, 1};
4065 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4066 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4067 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4069 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4070 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4071 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4072 stream_sample_aspect_ratio = undef;
4074 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4075 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4076 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4077 frame_sample_aspect_ratio = undef;
4079 if (stream_sample_aspect_ratio.num)
4080 return stream_sample_aspect_ratio;
4082 return frame_sample_aspect_ratio;
4085 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4088 if (*spec <= '9' && *spec >= '0') /* opt:index */
4089 return strtol(spec, NULL, 0) == st->index;
4090 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4091 *spec == 't') { /* opt:[vasdt] */
4092 enum AVMediaType type;
4095 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4096 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4097 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4098 case 'd': type = AVMEDIA_TYPE_DATA; break;
4099 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4100 default: av_assert0(0);
4102 if (type != st->codec->codec_type)
4104 if (*spec++ == ':') { /* possibly followed by :index */
4105 int i, index = strtol(spec, NULL, 0);
4106 for (i = 0; i < s->nb_streams; i++)
4107 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4108 return i == st->index;
4112 } else if (*spec == 'p' && *(spec + 1) == ':') {
4116 prog_id = strtol(spec, &endptr, 0);
4117 for (i = 0; i < s->nb_programs; i++) {
4118 if (s->programs[i]->id != prog_id)
4121 if (*endptr++ == ':') {
4122 int stream_idx = strtol(endptr, NULL, 0);
4123 return stream_idx >= 0 &&
4124 stream_idx < s->programs[i]->nb_stream_indexes &&
4125 st->index == s->programs[i]->stream_index[stream_idx];
4128 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4129 if (st->index == s->programs[i]->stream_index[j])
4133 } else if (*spec == '#') {
4136 sid = strtol(spec + 1, &endptr, 0);
4138 return st->id == sid;
4139 } else if (!*spec) /* empty specifier, matches everything */
4142 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4143 return AVERROR(EINVAL);