2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(0, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
299 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
300 int id3len = ff_id3v2_tag_len(lpd.buf);
301 if (lpd.buf_size > id3len + 16) {
303 lpd.buf_size -= id3len;
309 while ((fmt1 = av_iformat_next(fmt1))) {
310 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
313 if (fmt1->read_probe) {
314 score = fmt1->read_probe(&lpd);
315 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
316 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
317 } else if (fmt1->extensions) {
318 if (av_match_ext(lpd.filename, fmt1->extensions)) {
322 if (score > score_max) {
325 }else if (score == score_max)
328 *score_ret= score_max;
333 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
336 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
337 if(score_ret > *score_max){
338 *score_max= score_ret;
344 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
346 return av_probe_input_format2(pd, is_opened, &score);
349 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
351 static const struct {
352 const char *name; enum AVCodecID id; enum AVMediaType type;
354 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
355 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
356 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
357 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
358 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
359 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
360 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
361 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
362 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
366 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
368 if (fmt && st->request_probe <= score) {
370 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
371 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
372 for (i = 0; fmt_id_type[i].name; i++) {
373 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
374 st->codec->codec_id = fmt_id_type[i].id;
375 st->codec->codec_type = fmt_id_type[i].type;
383 /************************************************************/
384 /* input media file */
386 int av_demuxer_open(AVFormatContext *ic){
389 if (ic->iformat->read_header) {
390 err = ic->iformat->read_header(ic);
395 if (ic->pb && !ic->data_offset)
396 ic->data_offset = avio_tell(ic->pb);
402 /** size of probe buffer, for guessing file type from file contents */
403 #define PROBE_BUF_MIN 2048
404 #define PROBE_BUF_MAX (1<<20)
406 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
407 const char *filename, void *logctx,
408 unsigned int offset, unsigned int max_probe_size)
410 AVProbeData pd = { filename ? filename : "", NULL, -offset };
411 unsigned char *buf = NULL;
412 int ret = 0, probe_size;
414 if (!max_probe_size) {
415 max_probe_size = PROBE_BUF_MAX;
416 } else if (max_probe_size > PROBE_BUF_MAX) {
417 max_probe_size = PROBE_BUF_MAX;
418 } else if (max_probe_size < PROBE_BUF_MIN) {
419 return AVERROR(EINVAL);
422 if (offset >= max_probe_size) {
423 return AVERROR(EINVAL);
426 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
427 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
428 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
429 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
432 if (probe_size < offset) {
436 /* read probe data */
437 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
440 return AVERROR(ENOMEM);
443 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
444 /* fail if error was not end of file, otherwise, lower score */
445 if (ret != AVERROR_EOF) {
450 ret = 0; /* error was end of file, nothing read */
453 pd.buf = &buf[offset];
455 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
457 /* guess file format */
458 *fmt = av_probe_input_format2(&pd, 1, &score);
460 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
461 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
463 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
469 return AVERROR_INVALIDDATA;
472 /* rewind. reuse probe buffer to avoid seeking */
473 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
478 /* open input file and probe the format if necessary */
479 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
482 AVProbeData pd = {filename, NULL, 0};
483 int score = AVPROBE_SCORE_RETRY;
486 s->flags |= AVFMT_FLAG_CUSTOM_IO;
488 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
489 else if (s->iformat->flags & AVFMT_NOFILE)
490 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
491 "will be ignored with AVFMT_NOFILE format.\n");
495 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
496 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
499 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
500 &s->interrupt_callback, options)) < 0)
504 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
507 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
508 AVPacketList **plast_pktl){
509 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
514 (*plast_pktl)->next = pktl;
516 *packet_buffer = pktl;
518 /* add the packet in the buffered packet list */
524 void avformat_queue_attached_pictures(AVFormatContext *s)
527 for (i = 0; i < s->nb_streams; i++)
528 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
529 s->streams[i]->discard < AVDISCARD_ALL) {
530 AVPacket copy = s->streams[i]->attached_pic;
531 copy.destruct = NULL;
532 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
536 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
538 AVFormatContext *s = *ps;
540 AVDictionary *tmp = NULL;
541 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
543 if (!s && !(s = avformat_alloc_context()))
544 return AVERROR(ENOMEM);
546 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
547 return AVERROR(EINVAL);
553 av_dict_copy(&tmp, *options, 0);
555 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
558 if ((ret = init_input(s, filename, &tmp)) < 0)
561 /* check filename in case an image number is expected */
562 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
563 if (!av_filename_number_test(filename)) {
564 ret = AVERROR(EINVAL);
569 s->duration = s->start_time = AV_NOPTS_VALUE;
570 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
572 /* allocate private data */
573 if (s->iformat->priv_data_size > 0) {
574 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
575 ret = AVERROR(ENOMEM);
578 if (s->iformat->priv_class) {
579 *(const AVClass**)s->priv_data = s->iformat->priv_class;
580 av_opt_set_defaults(s->priv_data);
581 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
586 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
588 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
590 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
591 if ((ret = s->iformat->read_header(s)) < 0)
594 if (id3v2_extra_meta) {
595 if (!strcmp(s->iformat->name, "mp3")) {
596 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
599 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
601 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
603 avformat_queue_attached_pictures(s);
605 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
606 s->data_offset = avio_tell(s->pb);
608 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
611 av_dict_free(options);
618 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
620 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
622 avformat_free_context(s);
627 /*******************************************************/
629 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
631 if(st->request_probe>0){
632 AVProbeData *pd = &st->probe_data;
634 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
638 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
642 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
643 pd->buf_size += pkt->size;
644 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
647 st->probe_packets = 0;
649 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
654 end= s->raw_packet_buffer_remaining_size <= 0
655 || st->probe_packets<=0;
657 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
658 int score= set_codec_from_probe_data(s, st, pd);
659 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
663 st->request_probe= -1;
664 if(st->codec->codec_id != AV_CODEC_ID_NONE){
665 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
667 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
673 static void force_codec_ids(AVFormatContext *s, AVStream *st)
675 switch(st->codec->codec_type){
676 case AVMEDIA_TYPE_VIDEO:
677 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
679 case AVMEDIA_TYPE_AUDIO:
680 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
682 case AVMEDIA_TYPE_SUBTITLE:
683 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
688 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
694 AVPacketList *pktl = s->raw_packet_buffer;
698 st = s->streams[pkt->stream_index];
699 if(st->request_probe <= 0){
700 s->raw_packet_buffer = pktl->next;
701 s->raw_packet_buffer_remaining_size += pkt->size;
710 ret= s->iformat->read_packet(s, pkt);
712 if (!pktl || ret == AVERROR(EAGAIN))
714 for (i = 0; i < s->nb_streams; i++) {
716 if (st->probe_packets) {
717 probe_codec(s, st, NULL);
719 av_assert0(st->request_probe <= 0);
724 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
725 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
726 av_log(s, AV_LOG_WARNING,
727 "Dropped corrupted packet (stream = %d)\n",
733 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
734 av_packet_merge_side_data(pkt);
736 if(pkt->stream_index >= (unsigned)s->nb_streams){
737 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
741 st= s->streams[pkt->stream_index];
743 force_codec_ids(s, st);
745 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
746 if (s->use_wallclock_as_timestamps)
747 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
749 if(!pktl && st->request_probe <= 0)
752 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
753 s->raw_packet_buffer_remaining_size -= pkt->size;
755 probe_codec(s, st, pkt);
759 #if FF_API_READ_PACKET
760 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
762 return ff_read_packet(s, pkt);
767 /**********************************************************/
769 static int determinable_frame_size(AVCodecContext *avctx)
771 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
772 avctx->codec_id == AV_CODEC_ID_MP1 ||
773 avctx->codec_id == AV_CODEC_ID_MP2 ||
774 avctx->codec_id == AV_CODEC_ID_MP3/* ||
775 avctx->codec_id == AV_CODEC_ID_CELT*/)
781 * Get the number of samples of an audio frame. Return -1 on error.
783 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
787 /* give frame_size priority if demuxing */
788 if (!mux && enc->frame_size > 1)
789 return enc->frame_size;
791 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
794 /* fallback to using frame_size if muxing */
795 if (enc->frame_size > 1)
796 return enc->frame_size;
803 * Return the frame duration in seconds. Return 0 if not available.
805 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
806 AVCodecParserContext *pc, AVPacket *pkt)
812 switch(st->codec->codec_type) {
813 case AVMEDIA_TYPE_VIDEO:
814 if (st->r_frame_rate.num && !pc) {
815 *pnum = st->r_frame_rate.den;
816 *pden = st->r_frame_rate.num;
817 } else if(st->time_base.num*1000LL > st->time_base.den) {
818 *pnum = st->time_base.num;
819 *pden = st->time_base.den;
820 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
821 *pnum = st->codec->time_base.num;
822 *pden = st->codec->time_base.den;
823 if (pc && pc->repeat_pict) {
824 *pnum = (*pnum) * (1 + pc->repeat_pict);
826 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
827 //Thus if we have no parser in such case leave duration undefined.
828 if(st->codec->ticks_per_frame>1 && !pc){
833 case AVMEDIA_TYPE_AUDIO:
834 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
835 if (frame_size <= 0 || st->codec->sample_rate <= 0)
838 *pden = st->codec->sample_rate;
845 static int is_intra_only(AVCodecContext *enc){
846 const AVCodecDescriptor *desc;
848 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
851 desc = av_codec_get_codec_descriptor(enc);
853 desc = avcodec_descriptor_get(enc->codec_id);
854 av_codec_set_codec_descriptor(enc, desc);
857 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
861 static int has_decode_delay_been_guessed(AVStream *st)
863 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
864 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
866 #if CONFIG_H264_DECODER
867 if(st->codec->has_b_frames &&
868 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
871 if(st->codec->has_b_frames<3)
872 return st->nb_decoded_frames >= 7;
873 else if(st->codec->has_b_frames<4)
874 return st->nb_decoded_frames >= 18;
876 return st->nb_decoded_frames >= 20;
879 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
883 if (pktl == s->parse_queue_end)
884 return s->packet_buffer;
888 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
889 int64_t dts, int64_t pts)
891 AVStream *st= s->streams[stream_index];
892 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
893 int64_t pts_buffer[MAX_REORDER_DELAY+1];
897 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
900 delay = st->codec->has_b_frames;
901 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
903 shift = st->first_dts - RELATIVE_TS_BASE;
905 for (i=0; i<MAX_REORDER_DELAY+1; i++)
906 pts_buffer[i] = AV_NOPTS_VALUE;
908 if (is_relative(pts))
911 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
912 if(pktl->pkt.stream_index != stream_index)
914 if(is_relative(pktl->pkt.pts))
915 pktl->pkt.pts += shift;
917 if(is_relative(pktl->pkt.dts))
918 pktl->pkt.dts += shift;
920 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
921 st->start_time= pktl->pkt.pts;
923 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
924 pts_buffer[0]= pktl->pkt.pts;
925 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
926 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
927 if(pktl->pkt.dts == AV_NOPTS_VALUE)
928 pktl->pkt.dts= pts_buffer[0];
931 if (st->start_time == AV_NOPTS_VALUE)
932 st->start_time = pts;
935 static void update_initial_durations(AVFormatContext *s, AVStream *st,
936 int stream_index, int duration)
938 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
939 int64_t cur_dts= RELATIVE_TS_BASE;
941 if(st->first_dts != AV_NOPTS_VALUE){
942 cur_dts= st->first_dts;
943 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
944 if(pktl->pkt.stream_index == stream_index){
945 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
950 if(pktl && pktl->pkt.dts != st->first_dts) {
951 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));
955 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
958 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
959 st->first_dts = cur_dts;
960 }else if(st->cur_dts != RELATIVE_TS_BASE)
963 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
964 if(pktl->pkt.stream_index != stream_index)
966 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
967 && !pktl->pkt.duration){
968 pktl->pkt.dts= cur_dts;
969 if(!st->codec->has_b_frames)
970 pktl->pkt.pts= cur_dts;
971 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
972 pktl->pkt.duration = duration;
975 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
978 st->cur_dts= cur_dts;
981 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
982 AVCodecParserContext *pc, AVPacket *pkt)
984 int num, den, presentation_delayed, delay, i;
987 if (s->flags & AVFMT_FLAG_NOFILLIN)
990 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
991 pkt->dts= AV_NOPTS_VALUE;
993 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
994 //FIXME Set low_delay = 0 when has_b_frames = 1
995 st->codec->has_b_frames = 1;
997 /* do we have a video B-frame ? */
998 delay= st->codec->has_b_frames;
999 presentation_delayed = 0;
1001 /* XXX: need has_b_frame, but cannot get it if the codec is
1004 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1005 presentation_delayed = 1;
1007 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){
1008 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1009 pkt->dts -= 1LL<<st->pts_wrap_bits;
1011 pkt->pts += 1LL<<st->pts_wrap_bits;
1014 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1015 // we take the conservative approach and discard both
1016 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1017 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1018 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1019 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1020 pkt->dts= AV_NOPTS_VALUE;
1023 if (pkt->duration == 0) {
1024 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1026 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1029 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1030 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1032 /* correct timestamps with byte offset if demuxers only have timestamps
1033 on packet boundaries */
1034 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1035 /* this will estimate bitrate based on this frame's duration and size */
1036 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1037 if(pkt->pts != AV_NOPTS_VALUE)
1039 if(pkt->dts != AV_NOPTS_VALUE)
1043 if (pc && pc->dts_sync_point >= 0) {
1044 // we have synchronization info from the parser
1045 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1047 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1048 if (pkt->dts != AV_NOPTS_VALUE) {
1049 // got DTS from the stream, update reference timestamp
1050 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1051 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1052 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1053 // compute DTS based on reference timestamp
1054 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1055 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1057 if (pc->dts_sync_point > 0)
1058 st->reference_dts = pkt->dts; // new reference
1062 /* This may be redundant, but it should not hurt. */
1063 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1064 presentation_delayed = 1;
1066 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1067 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1068 /* interpolate PTS and DTS if they are not present */
1069 //We skip H264 currently because delay and has_b_frames are not reliably set
1070 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1071 if (presentation_delayed) {
1072 /* DTS = decompression timestamp */
1073 /* PTS = presentation timestamp */
1074 if (pkt->dts == AV_NOPTS_VALUE)
1075 pkt->dts = st->last_IP_pts;
1076 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1077 if (pkt->dts == AV_NOPTS_VALUE)
1078 pkt->dts = st->cur_dts;
1080 /* this is tricky: the dts must be incremented by the duration
1081 of the frame we are displaying, i.e. the last I- or P-frame */
1082 if (st->last_IP_duration == 0)
1083 st->last_IP_duration = pkt->duration;
1084 if(pkt->dts != AV_NOPTS_VALUE)
1085 st->cur_dts = pkt->dts + st->last_IP_duration;
1086 st->last_IP_duration = pkt->duration;
1087 st->last_IP_pts= pkt->pts;
1088 /* cannot compute PTS if not present (we can compute it only
1089 by knowing the future */
1090 } else if (pkt->pts != AV_NOPTS_VALUE ||
1091 pkt->dts != AV_NOPTS_VALUE ||
1093 int duration = pkt->duration;
1095 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1096 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1097 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1098 if( old_diff < new_diff && old_diff < (duration>>3)
1099 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1100 && (!strcmp(s->iformat->name, "mpeg") ||
1101 !strcmp(s->iformat->name, "mpegts"))){
1102 pkt->pts += duration;
1103 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1104 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1105 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1109 /* presentation is not delayed : PTS and DTS are the same */
1110 if (pkt->pts == AV_NOPTS_VALUE)
1111 pkt->pts = pkt->dts;
1112 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1114 if (pkt->pts == AV_NOPTS_VALUE)
1115 pkt->pts = st->cur_dts;
1116 pkt->dts = pkt->pts;
1117 if (pkt->pts != AV_NOPTS_VALUE)
1118 st->cur_dts = pkt->pts + duration;
1122 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1123 st->pts_buffer[0]= pkt->pts;
1124 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1125 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1126 if(pkt->dts == AV_NOPTS_VALUE)
1127 pkt->dts= st->pts_buffer[0];
1129 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1130 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1132 if(pkt->dts > st->cur_dts)
1133 st->cur_dts = pkt->dts;
1135 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1136 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1139 if (is_intra_only(st->codec))
1140 pkt->flags |= AV_PKT_FLAG_KEY;
1142 pkt->convergence_duration = pc->convergence_duration;
1145 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1148 AVPacketList *pktl = *pkt_buf;
1149 *pkt_buf = pktl->next;
1150 av_free_packet(&pktl->pkt);
1153 *pkt_buf_end = NULL;
1157 * Parse a packet, add all split parts to parse_queue
1159 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1161 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1163 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1164 AVStream *st = s->streams[stream_index];
1165 uint8_t *data = pkt ? pkt->data : NULL;
1166 int size = pkt ? pkt->size : 0;
1167 int ret = 0, got_output = 0;
1170 av_init_packet(&flush_pkt);
1173 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1174 // preserve 0-size sync packets
1175 compute_pkt_fields(s, st, st->parser, pkt);
1178 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1181 av_init_packet(&out_pkt);
1182 len = av_parser_parse2(st->parser, st->codec,
1183 &out_pkt.data, &out_pkt.size, data, size,
1184 pkt->pts, pkt->dts, pkt->pos);
1186 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1188 /* increment read pointer */
1192 got_output = !!out_pkt.size;
1197 /* set the duration */
1198 out_pkt.duration = 0;
1199 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1200 if (st->codec->sample_rate > 0) {
1201 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1202 (AVRational){ 1, st->codec->sample_rate },
1206 } else if (st->codec->time_base.num != 0 &&
1207 st->codec->time_base.den != 0) {
1208 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1209 st->codec->time_base,
1214 out_pkt.stream_index = st->index;
1215 out_pkt.pts = st->parser->pts;
1216 out_pkt.dts = st->parser->dts;
1217 out_pkt.pos = st->parser->pos;
1219 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1220 out_pkt.pos = st->parser->frame_offset;
1222 if (st->parser->key_frame == 1 ||
1223 (st->parser->key_frame == -1 &&
1224 st->parser->pict_type == AV_PICTURE_TYPE_I))
1225 out_pkt.flags |= AV_PKT_FLAG_KEY;
1227 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1228 out_pkt.flags |= AV_PKT_FLAG_KEY;
1230 compute_pkt_fields(s, st, st->parser, &out_pkt);
1232 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1233 out_pkt.destruct = pkt->destruct;
1234 pkt->destruct = NULL;
1236 if ((ret = av_dup_packet(&out_pkt)) < 0)
1239 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1240 av_free_packet(&out_pkt);
1241 ret = AVERROR(ENOMEM);
1247 /* end of the stream => close and free the parser */
1248 if (pkt == &flush_pkt) {
1249 av_parser_close(st->parser);
1254 av_free_packet(pkt);
1258 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1259 AVPacketList **pkt_buffer_end,
1263 av_assert0(*pkt_buffer);
1266 *pkt_buffer = pktl->next;
1268 *pkt_buffer_end = NULL;
1273 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1275 int ret = 0, i, got_packet = 0;
1277 av_init_packet(pkt);
1279 while (!got_packet && !s->parse_queue) {
1283 /* read next packet */
1284 ret = ff_read_packet(s, &cur_pkt);
1286 if (ret == AVERROR(EAGAIN))
1288 /* flush the parsers */
1289 for(i = 0; i < s->nb_streams; i++) {
1291 if (st->parser && st->need_parsing)
1292 parse_packet(s, NULL, st->index);
1294 /* all remaining packets are now in parse_queue =>
1295 * really terminate parsing */
1299 st = s->streams[cur_pkt.stream_index];
1301 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1302 cur_pkt.dts != AV_NOPTS_VALUE &&
1303 cur_pkt.pts < cur_pkt.dts) {
1304 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1305 cur_pkt.stream_index,
1306 av_ts2str(cur_pkt.pts),
1307 av_ts2str(cur_pkt.dts),
1310 if (s->debug & FF_FDEBUG_TS)
1311 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1312 cur_pkt.stream_index,
1313 av_ts2str(cur_pkt.pts),
1314 av_ts2str(cur_pkt.dts),
1319 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1320 st->parser = av_parser_init(st->codec->codec_id);
1322 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1323 "%s, packets or times may be invalid.\n",
1324 avcodec_get_name(st->codec->codec_id));
1325 /* no parser available: just output the raw packets */
1326 st->need_parsing = AVSTREAM_PARSE_NONE;
1327 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1328 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1329 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1330 st->parser->flags |= PARSER_FLAG_ONCE;
1331 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1332 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1336 if (!st->need_parsing || !st->parser) {
1337 /* no parsing needed: we just output the packet as is */
1339 compute_pkt_fields(s, st, NULL, pkt);
1340 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1341 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1342 ff_reduce_index(s, st->index);
1343 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1346 } else if (st->discard < AVDISCARD_ALL) {
1347 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1351 av_free_packet(&cur_pkt);
1353 if (pkt->flags & AV_PKT_FLAG_KEY)
1354 st->skip_to_keyframe = 0;
1355 if (st->skip_to_keyframe) {
1356 av_free_packet(&cur_pkt);
1361 if (!got_packet && s->parse_queue)
1362 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1364 if(s->debug & FF_FDEBUG_TS)
1365 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1367 av_ts2str(pkt->pts),
1368 av_ts2str(pkt->dts),
1376 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1378 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1384 ret = s->packet_buffer ?
1385 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1386 read_frame_internal(s, pkt);
1393 AVPacketList *pktl = s->packet_buffer;
1396 AVPacket *next_pkt = &pktl->pkt;
1398 if (next_pkt->dts != AV_NOPTS_VALUE) {
1399 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1400 // last dts seen for this stream. if any of packets following
1401 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1402 int64_t last_dts = next_pkt->dts;
1403 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1404 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1405 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1406 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1407 next_pkt->pts = pktl->pkt.dts;
1409 if (last_dts != AV_NOPTS_VALUE) {
1410 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1411 last_dts = pktl->pkt.dts;
1416 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1417 // Fixing the last reference frame had none pts issue (For MXF etc).
1418 // We only do this when
1420 // 2. we are not able to resolve a pts value for current packet.
1421 // 3. the packets for this stream at the end of the files had valid dts.
1422 next_pkt->pts = last_dts + next_pkt->duration;
1424 pktl = s->packet_buffer;
1427 /* read packet from packet buffer, if there is data */
1428 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1429 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1430 ret = read_from_packet_buffer(&s->packet_buffer,
1431 &s->packet_buffer_end, pkt);
1436 ret = read_frame_internal(s, pkt);
1438 if (pktl && ret != AVERROR(EAGAIN)) {
1445 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1446 &s->packet_buffer_end)) < 0)
1447 return AVERROR(ENOMEM);
1452 st = s->streams[pkt->stream_index];
1453 if (st->skip_samples) {
1454 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1455 AV_WL32(p, st->skip_samples);
1456 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1457 st->skip_samples = 0;
1460 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1461 ff_reduce_index(s, st->index);
1462 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1465 if (is_relative(pkt->dts))
1466 pkt->dts -= RELATIVE_TS_BASE;
1467 if (is_relative(pkt->pts))
1468 pkt->pts -= RELATIVE_TS_BASE;
1473 /* XXX: suppress the packet queue */
1474 static void flush_packet_queue(AVFormatContext *s)
1476 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1477 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1478 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1480 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1483 /*******************************************************/
1486 int av_find_default_stream_index(AVFormatContext *s)
1488 int first_audio_index = -1;
1492 if (s->nb_streams <= 0)
1494 for(i = 0; i < s->nb_streams; i++) {
1496 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1497 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1500 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1501 first_audio_index = i;
1503 return first_audio_index >= 0 ? first_audio_index : 0;
1507 * Flush the frame reader.
1509 void ff_read_frame_flush(AVFormatContext *s)
1514 flush_packet_queue(s);
1516 /* for each stream, reset read state */
1517 for(i = 0; i < s->nb_streams; i++) {
1521 av_parser_close(st->parser);
1524 st->last_IP_pts = AV_NOPTS_VALUE;
1525 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1526 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1527 st->reference_dts = AV_NOPTS_VALUE;
1529 st->probe_packets = MAX_PROBE_PACKETS;
1531 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1532 st->pts_buffer[j]= AV_NOPTS_VALUE;
1536 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1540 for(i = 0; i < s->nb_streams; i++) {
1541 AVStream *st = s->streams[i];
1543 st->cur_dts = av_rescale(timestamp,
1544 st->time_base.den * (int64_t)ref_st->time_base.num,
1545 st->time_base.num * (int64_t)ref_st->time_base.den);
1549 void ff_reduce_index(AVFormatContext *s, int stream_index)
1551 AVStream *st= s->streams[stream_index];
1552 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1554 if((unsigned)st->nb_index_entries >= max_entries){
1556 for(i=0; 2*i<st->nb_index_entries; i++)
1557 st->index_entries[i]= st->index_entries[2*i];
1558 st->nb_index_entries= i;
1562 int ff_add_index_entry(AVIndexEntry **index_entries,
1563 int *nb_index_entries,
1564 unsigned int *index_entries_allocated_size,
1565 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1567 AVIndexEntry *entries, *ie;
1570 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1573 if(timestamp == AV_NOPTS_VALUE)
1574 return AVERROR(EINVAL);
1576 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1577 timestamp -= RELATIVE_TS_BASE;
1579 entries = av_fast_realloc(*index_entries,
1580 index_entries_allocated_size,
1581 (*nb_index_entries + 1) *
1582 sizeof(AVIndexEntry));
1586 *index_entries= entries;
1588 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1591 index= (*nb_index_entries)++;
1592 ie= &entries[index];
1593 assert(index==0 || ie[-1].timestamp < timestamp);
1595 ie= &entries[index];
1596 if(ie->timestamp != timestamp){
1597 if(ie->timestamp <= timestamp)
1599 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1600 (*nb_index_entries)++;
1601 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1602 distance= ie->min_distance;
1606 ie->timestamp = timestamp;
1607 ie->min_distance= distance;
1614 int av_add_index_entry(AVStream *st,
1615 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1617 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1618 &st->index_entries_allocated_size, pos,
1619 timestamp, size, distance, flags);
1622 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1623 int64_t wanted_timestamp, int flags)
1631 //optimize appending index entries at the end
1632 if(b && entries[b-1].timestamp < wanted_timestamp)
1637 timestamp = entries[m].timestamp;
1638 if(timestamp >= wanted_timestamp)
1640 if(timestamp <= wanted_timestamp)
1643 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1645 if(!(flags & AVSEEK_FLAG_ANY)){
1646 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1647 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1656 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1659 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1660 wanted_timestamp, flags);
1663 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1665 AVInputFormat *avif= s->iformat;
1666 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1667 int64_t ts_min, ts_max, ts;
1672 if (stream_index < 0)
1675 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1678 ts_min= AV_NOPTS_VALUE;
1679 pos_limit= -1; //gcc falsely says it may be uninitialized
1681 st= s->streams[stream_index];
1682 if(st->index_entries){
1685 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()
1686 index= FFMAX(index, 0);
1687 e= &st->index_entries[index];
1689 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1691 ts_min= e->timestamp;
1692 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1693 pos_min, av_ts2str(ts_min));
1698 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1699 assert(index < st->nb_index_entries);
1701 e= &st->index_entries[index];
1702 assert(e->timestamp >= target_ts);
1704 ts_max= e->timestamp;
1705 pos_limit= pos_max - e->min_distance;
1706 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1707 pos_max, pos_limit, av_ts2str(ts_max));
1711 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1716 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1719 ff_read_frame_flush(s);
1720 ff_update_cur_dts(s, st, ts);
1725 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1726 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1727 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1728 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1731 int64_t start_pos, filesize;
1734 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1736 if(ts_min == AV_NOPTS_VALUE){
1737 pos_min = s->data_offset;
1738 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1739 if (ts_min == AV_NOPTS_VALUE)
1743 if(ts_min >= target_ts){
1748 if(ts_max == AV_NOPTS_VALUE){
1750 filesize = avio_size(s->pb);
1751 pos_max = filesize - 1;
1754 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1756 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1757 if (ts_max == AV_NOPTS_VALUE)
1761 int64_t tmp_pos= pos_max + 1;
1762 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1763 if(tmp_ts == AV_NOPTS_VALUE)
1767 if(tmp_pos >= filesize)
1773 if(ts_max <= target_ts){
1778 if(ts_min > ts_max){
1780 }else if(ts_min == ts_max){
1785 while (pos_min < pos_limit) {
1786 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1787 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1788 assert(pos_limit <= pos_max);
1791 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1792 // interpolate position (better than dichotomy)
1793 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1794 + pos_min - approximate_keyframe_distance;
1795 }else if(no_change==1){
1796 // bisection, if interpolation failed to change min or max pos last time
1797 pos = (pos_min + pos_limit)>>1;
1799 /* linear search if bisection failed, can only happen if there
1800 are very few or no keyframes between min/max */
1805 else if(pos > pos_limit)
1809 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1814 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1815 pos_min, pos, pos_max,
1816 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1817 pos_limit, start_pos, no_change);
1818 if(ts == AV_NOPTS_VALUE){
1819 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1822 assert(ts != AV_NOPTS_VALUE);
1823 if (target_ts <= ts) {
1824 pos_limit = start_pos - 1;
1828 if (target_ts >= ts) {
1834 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1835 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1838 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1840 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1841 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1842 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1848 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1849 int64_t pos_min, pos_max;
1851 pos_min = s->data_offset;
1852 pos_max = avio_size(s->pb) - 1;
1854 if (pos < pos_min) pos= pos_min;
1855 else if(pos > pos_max) pos= pos_max;
1857 avio_seek(s->pb, pos, SEEK_SET);
1862 static int seek_frame_generic(AVFormatContext *s,
1863 int stream_index, int64_t timestamp, int flags)
1870 st = s->streams[stream_index];
1872 index = av_index_search_timestamp(st, timestamp, flags);
1874 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1877 if(index < 0 || index==st->nb_index_entries-1){
1881 if(st->nb_index_entries){
1882 assert(st->index_entries);
1883 ie= &st->index_entries[st->nb_index_entries-1];
1884 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1886 ff_update_cur_dts(s, st, ie->timestamp);
1888 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1894 read_status = av_read_frame(s, &pkt);
1895 } while (read_status == AVERROR(EAGAIN));
1896 if (read_status < 0)
1898 av_free_packet(&pkt);
1899 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1900 if(pkt.flags & AV_PKT_FLAG_KEY)
1902 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1903 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);
1908 index = av_index_search_timestamp(st, timestamp, flags);
1913 ff_read_frame_flush(s);
1914 if (s->iformat->read_seek){
1915 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1918 ie = &st->index_entries[index];
1919 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1921 ff_update_cur_dts(s, st, ie->timestamp);
1926 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1927 int64_t timestamp, int flags)
1932 if (flags & AVSEEK_FLAG_BYTE) {
1933 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1935 ff_read_frame_flush(s);
1936 return seek_frame_byte(s, stream_index, timestamp, flags);
1939 if(stream_index < 0){
1940 stream_index= av_find_default_stream_index(s);
1941 if(stream_index < 0)
1944 st= s->streams[stream_index];
1945 /* timestamp for default must be expressed in AV_TIME_BASE units */
1946 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1949 /* first, we try the format specific seek */
1950 if (s->iformat->read_seek) {
1951 ff_read_frame_flush(s);
1952 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1959 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1960 ff_read_frame_flush(s);
1961 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1962 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1963 ff_read_frame_flush(s);
1964 return seek_frame_generic(s, stream_index, timestamp, flags);
1970 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1972 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1975 avformat_queue_attached_pictures(s);
1980 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1982 if(min_ts > ts || max_ts < ts)
1985 if (s->iformat->read_seek2) {
1987 ff_read_frame_flush(s);
1988 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1991 avformat_queue_attached_pictures(s);
1995 if(s->iformat->read_timestamp){
1996 //try to seek via read_timestamp()
1999 //Fallback to old API if new is not implemented but old is
2000 //Note the old has somewhat different semantics
2001 if (s->iformat->read_seek || 1) {
2002 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2003 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2004 if (ret<0 && ts != min_ts && max_ts != ts) {
2005 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2007 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2012 // try some generic seek like seek_frame_generic() but with new ts semantics
2015 /*******************************************************/
2018 * Return TRUE if the stream has accurate duration in any stream.
2020 * @return TRUE if the stream has accurate duration for at least one component.
2022 static int has_duration(AVFormatContext *ic)
2027 for(i = 0;i < ic->nb_streams; i++) {
2028 st = ic->streams[i];
2029 if (st->duration != AV_NOPTS_VALUE)
2032 if (ic->duration != AV_NOPTS_VALUE)
2038 * Estimate the stream timings from the one of each components.
2040 * Also computes the global bitrate if possible.
2042 static void update_stream_timings(AVFormatContext *ic)
2044 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2045 int64_t duration, duration1, filesize;
2049 start_time = INT64_MAX;
2050 start_time_text = INT64_MAX;
2051 end_time = INT64_MIN;
2052 duration = INT64_MIN;
2053 for(i = 0;i < ic->nb_streams; i++) {
2054 st = ic->streams[i];
2055 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2056 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2057 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2058 if (start_time1 < start_time_text)
2059 start_time_text = start_time1;
2061 start_time = FFMIN(start_time, start_time1);
2062 if (st->duration != AV_NOPTS_VALUE) {
2063 end_time1 = start_time1
2064 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2065 end_time = FFMAX(end_time, end_time1);
2068 if (st->duration != AV_NOPTS_VALUE) {
2069 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2070 duration = FFMAX(duration, duration1);
2073 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2074 start_time = start_time_text;
2075 else if(start_time > start_time_text)
2076 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2078 if (start_time != INT64_MAX) {
2079 ic->start_time = start_time;
2080 if (end_time != INT64_MIN)
2081 duration = FFMAX(duration, end_time - start_time);
2083 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2084 ic->duration = duration;
2086 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2087 /* compute the bitrate */
2088 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2089 (double)ic->duration;
2093 static void fill_all_stream_timings(AVFormatContext *ic)
2098 update_stream_timings(ic);
2099 for(i = 0;i < ic->nb_streams; i++) {
2100 st = ic->streams[i];
2101 if (st->start_time == AV_NOPTS_VALUE) {
2102 if(ic->start_time != AV_NOPTS_VALUE)
2103 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2104 if(ic->duration != AV_NOPTS_VALUE)
2105 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2110 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2112 int64_t filesize, duration;
2116 /* if bit_rate is already set, we believe it */
2117 if (ic->bit_rate <= 0) {
2119 for(i=0;i<ic->nb_streams;i++) {
2120 st = ic->streams[i];
2121 if (st->codec->bit_rate > 0)
2122 bit_rate += st->codec->bit_rate;
2124 ic->bit_rate = bit_rate;
2127 /* if duration is already set, we believe it */
2128 if (ic->duration == AV_NOPTS_VALUE &&
2129 ic->bit_rate != 0) {
2130 filesize = ic->pb ? avio_size(ic->pb) : 0;
2132 for(i = 0; i < ic->nb_streams; i++) {
2133 st = ic->streams[i];
2134 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2135 if (st->duration == AV_NOPTS_VALUE)
2136 st->duration = duration;
2142 #define DURATION_MAX_READ_SIZE 250000
2143 #define DURATION_MAX_RETRY 3
2145 /* only usable for MPEG-PS streams */
2146 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2148 AVPacket pkt1, *pkt = &pkt1;
2150 int read_size, i, ret;
2152 int64_t filesize, offset, duration;
2155 /* flush packet queue */
2156 flush_packet_queue(ic);
2158 for (i=0; i<ic->nb_streams; i++) {
2159 st = ic->streams[i];
2160 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2161 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2164 av_parser_close(st->parser);
2169 /* estimate the end time (duration) */
2170 /* XXX: may need to support wrapping */
2171 filesize = ic->pb ? avio_size(ic->pb) : 0;
2172 end_time = AV_NOPTS_VALUE;
2174 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2178 avio_seek(ic->pb, offset, SEEK_SET);
2181 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2185 ret = ff_read_packet(ic, pkt);
2186 } while(ret == AVERROR(EAGAIN));
2189 read_size += pkt->size;
2190 st = ic->streams[pkt->stream_index];
2191 if (pkt->pts != AV_NOPTS_VALUE &&
2192 (st->start_time != AV_NOPTS_VALUE ||
2193 st->first_dts != AV_NOPTS_VALUE)) {
2194 duration = end_time = pkt->pts;
2195 if (st->start_time != AV_NOPTS_VALUE)
2196 duration -= st->start_time;
2198 duration -= st->first_dts;
2200 duration += 1LL<<st->pts_wrap_bits;
2202 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2203 st->duration = duration;
2206 av_free_packet(pkt);
2208 }while( end_time==AV_NOPTS_VALUE
2209 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2210 && ++retry <= DURATION_MAX_RETRY);
2212 fill_all_stream_timings(ic);
2214 avio_seek(ic->pb, old_offset, SEEK_SET);
2215 for (i=0; i<ic->nb_streams; i++) {
2217 st->cur_dts= st->first_dts;
2218 st->last_IP_pts = AV_NOPTS_VALUE;
2219 st->reference_dts = AV_NOPTS_VALUE;
2223 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2227 /* get the file size, if possible */
2228 if (ic->iformat->flags & AVFMT_NOFILE) {
2231 file_size = avio_size(ic->pb);
2232 file_size = FFMAX(0, file_size);
2235 if ((!strcmp(ic->iformat->name, "mpeg") ||
2236 !strcmp(ic->iformat->name, "mpegts")) &&
2237 file_size && ic->pb->seekable) {
2238 /* get accurate estimate from the PTSes */
2239 estimate_timings_from_pts(ic, old_offset);
2240 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2241 } else if (has_duration(ic)) {
2242 /* at least one component has timings - we use them for all
2244 fill_all_stream_timings(ic);
2245 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2247 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2248 /* less precise: use bitrate info */
2249 estimate_timings_from_bit_rate(ic);
2250 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2252 update_stream_timings(ic);
2256 AVStream av_unused *st;
2257 for(i = 0;i < ic->nb_streams; i++) {
2258 st = ic->streams[i];
2259 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2260 (double) st->start_time / AV_TIME_BASE,
2261 (double) st->duration / AV_TIME_BASE);
2263 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2264 (double) ic->start_time / AV_TIME_BASE,
2265 (double) ic->duration / AV_TIME_BASE,
2266 ic->bit_rate / 1000);
2270 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2272 AVCodecContext *avctx = st->codec;
2274 #define FAIL(errmsg) do { \
2276 *errmsg_ptr = errmsg; \
2280 switch (avctx->codec_type) {
2281 case AVMEDIA_TYPE_AUDIO:
2282 if (!avctx->frame_size && determinable_frame_size(avctx))
2283 FAIL("unspecified frame size");
2284 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2285 FAIL("unspecified sample format");
2286 if (!avctx->sample_rate)
2287 FAIL("unspecified sample rate");
2288 if (!avctx->channels)
2289 FAIL("unspecified number of channels");
2290 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2291 FAIL("no decodable DTS frames");
2293 case AVMEDIA_TYPE_VIDEO:
2295 FAIL("unspecified size");
2296 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2297 FAIL("unspecified pixel format");
2299 case AVMEDIA_TYPE_SUBTITLE:
2300 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2301 FAIL("unspecified size");
2303 case AVMEDIA_TYPE_DATA:
2304 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2307 if (avctx->codec_id == AV_CODEC_ID_NONE)
2308 FAIL("unknown codec");
2312 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2313 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2315 const AVCodec *codec;
2316 int got_picture = 1, ret = 0;
2317 AVFrame *frame = avcodec_alloc_frame();
2318 AVSubtitle subtitle;
2319 AVPacket pkt = *avpkt;
2322 return AVERROR(ENOMEM);
2324 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2325 AVDictionary *thread_opt = NULL;
2327 codec = st->codec->codec ? st->codec->codec :
2328 avcodec_find_decoder(st->codec->codec_id);
2331 st->info->found_decoder = -1;
2336 /* force thread count to 1 since the h264 decoder will not extract SPS
2337 * and PPS to extradata during multi-threaded decoding */
2338 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2339 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2341 av_dict_free(&thread_opt);
2343 st->info->found_decoder = -1;
2346 st->info->found_decoder = 1;
2347 } else if (!st->info->found_decoder)
2348 st->info->found_decoder = 1;
2350 if (st->info->found_decoder < 0) {
2355 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2357 (!has_codec_parameters(st, NULL) ||
2358 !has_decode_delay_been_guessed(st) ||
2359 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2361 avcodec_get_frame_defaults(frame);
2362 switch(st->codec->codec_type) {
2363 case AVMEDIA_TYPE_VIDEO:
2364 ret = avcodec_decode_video2(st->codec, frame,
2365 &got_picture, &pkt);
2367 case AVMEDIA_TYPE_AUDIO:
2368 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2370 case AVMEDIA_TYPE_SUBTITLE:
2371 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2372 &got_picture, &pkt);
2380 st->nb_decoded_frames++;
2387 if(!pkt.data && !got_picture)
2391 avcodec_free_frame(&frame);
2395 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2397 while (tags->id != AV_CODEC_ID_NONE) {
2405 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2408 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2409 if(tag == tags[i].tag)
2412 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2413 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2416 return AV_CODEC_ID_NONE;
2419 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2422 for(i=0; tags && tags[i]; i++){
2423 int tag= ff_codec_get_tag(tags[i], id);
2429 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2432 for(i=0; tags && tags[i]; i++){
2433 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2434 if(id!=AV_CODEC_ID_NONE) return id;
2436 return AV_CODEC_ID_NONE;
2439 static void compute_chapters_end(AVFormatContext *s)
2442 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2444 for (i = 0; i < s->nb_chapters; i++)
2445 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2446 AVChapter *ch = s->chapters[i];
2447 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2450 for (j = 0; j < s->nb_chapters; j++) {
2451 AVChapter *ch1 = s->chapters[j];
2452 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2453 if (j != i && next_start > ch->start && next_start < end)
2456 ch->end = (end == INT64_MAX) ? ch->start : end;
2460 static int get_std_framerate(int i){
2461 if(i<60*12) return (i+1)*1001;
2462 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2466 * Is the time base unreliable.
2467 * This is a heuristic to balance between quick acceptance of the values in
2468 * the headers vs. some extra checks.
2469 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2470 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2471 * And there are "variable" fps files this needs to detect as well.
2473 static int tb_unreliable(AVCodecContext *c){
2474 if( c->time_base.den >= 101L*c->time_base.num
2475 || c->time_base.den < 5L*c->time_base.num
2476 /* || c->codec_tag == AV_RL32("DIVX")
2477 || c->codec_tag == AV_RL32("XVID")*/
2478 || c->codec_tag == AV_RL32("mp4v")
2479 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2480 || c->codec_id == AV_CODEC_ID_H264
2486 #if FF_API_FORMAT_PARAMETERS
2487 int av_find_stream_info(AVFormatContext *ic)
2489 return avformat_find_stream_info(ic, NULL);
2493 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2495 int i, count, ret, read_size, j;
2497 AVPacket pkt1, *pkt;
2498 int64_t old_offset = avio_tell(ic->pb);
2499 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2500 int flush_codecs = ic->probesize > 0;
2503 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2505 for(i=0;i<ic->nb_streams;i++) {
2506 const AVCodec *codec;
2507 AVDictionary *thread_opt = NULL;
2508 st = ic->streams[i];
2510 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2511 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2512 /* if(!st->time_base.num)
2514 if(!st->codec->time_base.num)
2515 st->codec->time_base= st->time_base;
2517 //only for the split stuff
2518 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2519 st->parser = av_parser_init(st->codec->codec_id);
2521 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2522 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2523 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2524 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2526 } else if (st->need_parsing) {
2527 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2528 "%s, packets or times may be invalid.\n",
2529 avcodec_get_name(st->codec->codec_id));
2532 codec = st->codec->codec ? st->codec->codec :
2533 avcodec_find_decoder(st->codec->codec_id);
2535 /* force thread count to 1 since the h264 decoder will not extract SPS
2536 * and PPS to extradata during multi-threaded decoding */
2537 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2539 /* Ensure that subtitle_header is properly set. */
2540 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2541 && codec && !st->codec->codec)
2542 avcodec_open2(st->codec, codec, options ? &options[i]
2545 //try to just open decoders, in case this is enough to get parameters
2546 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2547 if (codec && !st->codec->codec)
2548 avcodec_open2(st->codec, codec, options ? &options[i]
2552 av_dict_free(&thread_opt);
2555 for (i=0; i<ic->nb_streams; i++) {
2556 #if FF_API_R_FRAME_RATE
2557 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2559 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2560 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2566 if (ff_check_interrupt(&ic->interrupt_callback)){
2568 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2572 /* check if one codec still needs to be handled */
2573 for(i=0;i<ic->nb_streams;i++) {
2574 int fps_analyze_framecount = 20;
2576 st = ic->streams[i];
2577 if (!has_codec_parameters(st, NULL))
2579 /* if the timebase is coarse (like the usual millisecond precision
2580 of mkv), we need to analyze more frames to reliably arrive at
2582 if (av_q2d(st->time_base) > 0.0005)
2583 fps_analyze_framecount *= 2;
2584 if (ic->fps_probe_size >= 0)
2585 fps_analyze_framecount = ic->fps_probe_size;
2586 /* variable fps and no guess at the real fps */
2587 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2588 && st->info->duration_count < fps_analyze_framecount
2589 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2591 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2593 if (st->first_dts == AV_NOPTS_VALUE &&
2594 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2595 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2598 if (i == ic->nb_streams) {
2599 /* NOTE: if the format has no header, then we need to read
2600 some packets to get most of the streams, so we cannot
2602 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2603 /* if we found the info for all the codecs, we can stop */
2605 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2610 /* we did not get all the codec info, but we read too much data */
2611 if (read_size >= ic->probesize) {
2613 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2614 for (i = 0; i < ic->nb_streams; i++)
2615 if (!ic->streams[i]->r_frame_rate.num &&
2616 ic->streams[i]->info->duration_count <= 1)
2617 av_log(ic, AV_LOG_WARNING,
2618 "Stream #%d: not enough frames to estimate rate; "
2619 "consider increasing probesize\n", i);
2623 /* NOTE: a new stream can be added there if no header in file
2624 (AVFMTCTX_NOHEADER) */
2625 ret = read_frame_internal(ic, &pkt1);
2626 if (ret == AVERROR(EAGAIN))
2634 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2637 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2638 &ic->packet_buffer_end);
2639 if ((ret = av_dup_packet(pkt)) < 0)
2640 goto find_stream_info_err;
2643 read_size += pkt->size;
2645 st = ic->streams[pkt->stream_index];
2646 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2647 /* check for non-increasing dts */
2648 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2649 st->info->fps_last_dts >= pkt->dts) {
2650 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2651 "packet %d with DTS %"PRId64", packet %d with DTS "
2652 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2653 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2654 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2656 /* check for a discontinuity in dts - if the difference in dts
2657 * is more than 1000 times the average packet duration in the sequence,
2658 * we treat it as a discontinuity */
2659 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2660 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2661 (pkt->dts - st->info->fps_last_dts) / 1000 >
2662 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2663 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2664 "packet %d with DTS %"PRId64", packet %d with DTS "
2665 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2666 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2667 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2670 /* update stored dts values */
2671 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2672 st->info->fps_first_dts = pkt->dts;
2673 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2675 st->info->fps_last_dts = pkt->dts;
2676 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2678 if (st->codec_info_nb_frames>1) {
2680 if (st->time_base.den > 0)
2681 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2682 if (st->avg_frame_rate.num > 0)
2683 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2685 if (t >= ic->max_analyze_duration) {
2686 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2689 if (pkt->duration) {
2690 st->info->codec_info_duration += pkt->duration;
2691 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2694 #if FF_API_R_FRAME_RATE
2696 int64_t last = st->info->last_dts;
2698 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2699 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2700 int64_t duration= pkt->dts - last;
2702 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2703 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2704 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2705 int framerate= get_std_framerate(i);
2706 double sdts= dts*framerate/(1001*12);
2708 int ticks= lrintf(sdts+j*0.5);
2709 double error= sdts - ticks + j*0.5;
2710 st->info->duration_error[j][0][i] += error;
2711 st->info->duration_error[j][1][i] += error*error;
2714 st->info->duration_count++;
2715 // ignore the first 4 values, they might have some random jitter
2716 if (st->info->duration_count > 3)
2717 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2719 if (pkt->dts != AV_NOPTS_VALUE)
2720 st->info->last_dts = pkt->dts;
2723 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2724 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2725 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2726 st->codec->extradata_size= i;
2727 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2728 if (!st->codec->extradata)
2729 return AVERROR(ENOMEM);
2730 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2731 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2735 /* if still no information, we try to open the codec and to
2736 decompress the frame. We try to avoid that in most cases as
2737 it takes longer and uses more memory. For MPEG-4, we need to
2738 decompress for QuickTime.
2740 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2741 least one frame of codec data, this makes sure the codec initializes
2742 the channel configuration and does not only trust the values from the container.
2744 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2746 st->codec_info_nb_frames++;
2751 AVPacket empty_pkt = { 0 };
2753 av_init_packet(&empty_pkt);
2755 ret = -1; /* we could not have all the codec parameters before EOF */
2756 for(i=0;i<ic->nb_streams;i++) {
2759 st = ic->streams[i];
2761 /* flush the decoders */
2762 if (st->info->found_decoder == 1) {
2764 err = try_decode_frame(st, &empty_pkt,
2765 (options && i < orig_nb_streams) ?
2766 &options[i] : NULL);
2767 } while (err > 0 && !has_codec_parameters(st, NULL));
2770 av_log(ic, AV_LOG_INFO,
2771 "decoding for stream %d failed\n", st->index);
2775 if (!has_codec_parameters(st, &errmsg)) {
2777 avcodec_string(buf, sizeof(buf), st->codec, 0);
2778 av_log(ic, AV_LOG_WARNING,
2779 "Could not find codec parameters for stream %d (%s): %s\n"
2780 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2788 // close codecs which were opened in try_decode_frame()
2789 for(i=0;i<ic->nb_streams;i++) {
2790 st = ic->streams[i];
2791 avcodec_close(st->codec);
2793 for(i=0;i<ic->nb_streams;i++) {
2794 st = ic->streams[i];
2795 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2796 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2797 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2798 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2799 st->codec->codec_tag= tag;
2802 /* estimate average framerate if not set by demuxer */
2803 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2805 double best_error = 0.01;
2807 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2808 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2809 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2811 /* round guessed framerate to a "standard" framerate if it's
2812 * within 1% of the original estimate*/
2813 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2814 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2815 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2817 if (error < best_error) {
2819 best_fps = std_fps.num;
2823 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2824 best_fps, 12*1001, INT_MAX);
2827 // the check for tb_unreliable() is not completely correct, since this is not about handling
2828 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2829 // ipmovie.c produces.
2830 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)
2831 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);
2832 if (st->info->duration_count && !st->r_frame_rate.num
2833 && tb_unreliable(st->codec)) {
2835 double best_error= 0.01;
2837 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2840 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2842 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2845 int n= st->info->duration_count;
2846 double a= st->info->duration_error[k][0][j] / n;
2847 double error= st->info->duration_error[k][1][j]/n - a*a;
2849 if(error < best_error && best_error> 0.000000001){
2851 num = get_std_framerate(j);
2854 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2857 // do not increase frame rate by more than 1 % in order to match a standard rate.
2858 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2859 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2862 if (!st->r_frame_rate.num){
2863 if( st->codec->time_base.den * (int64_t)st->time_base.num
2864 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2865 st->r_frame_rate.num = st->codec->time_base.den;
2866 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2868 st->r_frame_rate.num = st->time_base.den;
2869 st->r_frame_rate.den = st->time_base.num;
2872 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2873 if(!st->codec->bits_per_coded_sample)
2874 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2875 // set stream disposition based on audio service type
2876 switch (st->codec->audio_service_type) {
2877 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2878 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2879 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2880 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2881 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2882 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2883 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2884 st->disposition = AV_DISPOSITION_COMMENT; break;
2885 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2886 st->disposition = AV_DISPOSITION_KARAOKE; break;
2892 estimate_timings(ic, old_offset);
2894 compute_chapters_end(ic);
2896 find_stream_info_err:
2897 for (i=0; i < ic->nb_streams; i++) {
2898 if (ic->streams[i]->codec)
2899 ic->streams[i]->codec->thread_count = 0;
2900 av_freep(&ic->streams[i]->info);
2903 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2907 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2911 for (i = 0; i < ic->nb_programs; i++) {
2912 if (ic->programs[i] == last) {
2916 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2917 if (ic->programs[i]->stream_index[j] == s)
2918 return ic->programs[i];
2924 int av_find_best_stream(AVFormatContext *ic,
2925 enum AVMediaType type,
2926 int wanted_stream_nb,
2928 AVCodec **decoder_ret,
2931 int i, nb_streams = ic->nb_streams;
2932 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2933 unsigned *program = NULL;
2934 AVCodec *decoder = NULL, *best_decoder = NULL;
2936 if (related_stream >= 0 && wanted_stream_nb < 0) {
2937 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2939 program = p->stream_index;
2940 nb_streams = p->nb_stream_indexes;
2943 for (i = 0; i < nb_streams; i++) {
2944 int real_stream_index = program ? program[i] : i;
2945 AVStream *st = ic->streams[real_stream_index];
2946 AVCodecContext *avctx = st->codec;
2947 if (avctx->codec_type != type)
2949 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2951 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2954 decoder = avcodec_find_decoder(st->codec->codec_id);
2957 ret = AVERROR_DECODER_NOT_FOUND;
2961 if (best_count >= st->codec_info_nb_frames)
2963 best_count = st->codec_info_nb_frames;
2964 ret = real_stream_index;
2965 best_decoder = decoder;
2966 if (program && i == nb_streams - 1 && ret < 0) {
2968 nb_streams = ic->nb_streams;
2969 i = 0; /* no related stream found, try again with everything */
2973 *decoder_ret = best_decoder;
2977 /*******************************************************/
2979 int av_read_play(AVFormatContext *s)
2981 if (s->iformat->read_play)
2982 return s->iformat->read_play(s);
2984 return avio_pause(s->pb, 0);
2985 return AVERROR(ENOSYS);
2988 int av_read_pause(AVFormatContext *s)
2990 if (s->iformat->read_pause)
2991 return s->iformat->read_pause(s);
2993 return avio_pause(s->pb, 1);
2994 return AVERROR(ENOSYS);
2997 void ff_free_stream(AVFormatContext *s, AVStream *st){
2998 av_assert0(s->nb_streams>0);
2999 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3002 av_parser_close(st->parser);
3004 if (st->attached_pic.data)
3005 av_free_packet(&st->attached_pic);
3006 av_dict_free(&st->metadata);
3007 av_freep(&st->index_entries);
3008 av_freep(&st->codec->extradata);
3009 av_freep(&st->codec->subtitle_header);
3010 av_freep(&st->codec);
3011 av_freep(&st->priv_data);
3012 av_freep(&st->info);
3013 av_freep(&st->probe_data.buf);
3014 av_freep(&s->streams[ --s->nb_streams ]);
3017 void avformat_free_context(AVFormatContext *s)
3022 if (s->iformat && s->iformat->priv_class && s->priv_data)
3023 av_opt_free(s->priv_data);
3025 for(i=s->nb_streams-1; i>=0; i--) {
3026 ff_free_stream(s, s->streams[i]);
3028 for(i=s->nb_programs-1; i>=0; i--) {
3029 av_dict_free(&s->programs[i]->metadata);
3030 av_freep(&s->programs[i]->stream_index);
3031 av_freep(&s->programs[i]);
3033 av_freep(&s->programs);
3034 av_freep(&s->priv_data);
3035 while(s->nb_chapters--) {
3036 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3037 av_freep(&s->chapters[s->nb_chapters]);
3039 av_freep(&s->chapters);
3040 av_dict_free(&s->metadata);
3041 av_freep(&s->streams);
3045 #if FF_API_CLOSE_INPUT_FILE
3046 void av_close_input_file(AVFormatContext *s)
3048 avformat_close_input(&s);
3052 void avformat_close_input(AVFormatContext **ps)
3054 AVFormatContext *s = *ps;
3055 AVIOContext *pb = s->pb;
3057 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3058 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3061 flush_packet_queue(s);
3064 if (s->iformat->read_close)
3065 s->iformat->read_close(s);
3068 avformat_free_context(s);
3075 #if FF_API_NEW_STREAM
3076 AVStream *av_new_stream(AVFormatContext *s, int id)
3078 AVStream *st = avformat_new_stream(s, NULL);
3085 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
3091 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3093 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3096 s->streams = streams;
3098 st = av_mallocz(sizeof(AVStream));
3101 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3105 st->info->last_dts = AV_NOPTS_VALUE;
3107 st->codec = avcodec_alloc_context3(c);
3109 /* no default bitrate if decoding */
3110 st->codec->bit_rate = 0;
3112 st->index = s->nb_streams;
3113 st->start_time = AV_NOPTS_VALUE;
3114 st->duration = AV_NOPTS_VALUE;
3115 /* we set the current DTS to 0 so that formats without any timestamps
3116 but durations get some timestamps, formats with some unknown
3117 timestamps have their first few packets buffered and the
3118 timestamps corrected before they are returned to the user */
3119 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3120 st->first_dts = AV_NOPTS_VALUE;
3121 st->probe_packets = MAX_PROBE_PACKETS;
3123 /* default pts setting is MPEG-like */
3124 avpriv_set_pts_info(st, 33, 1, 90000);
3125 st->last_IP_pts = AV_NOPTS_VALUE;
3126 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3127 st->pts_buffer[i]= AV_NOPTS_VALUE;
3128 st->reference_dts = AV_NOPTS_VALUE;
3130 st->sample_aspect_ratio = (AVRational){0,1};
3132 #if FF_API_R_FRAME_RATE
3133 st->info->last_dts = AV_NOPTS_VALUE;
3135 st->info->fps_first_dts = AV_NOPTS_VALUE;
3136 st->info->fps_last_dts = AV_NOPTS_VALUE;
3138 s->streams[s->nb_streams++] = st;
3142 AVProgram *av_new_program(AVFormatContext *ac, int id)
3144 AVProgram *program=NULL;
3147 av_dlog(ac, "new_program: id=0x%04x\n", id);
3149 for(i=0; i<ac->nb_programs; i++)
3150 if(ac->programs[i]->id == id)
3151 program = ac->programs[i];
3154 program = av_mallocz(sizeof(AVProgram));
3157 dynarray_add(&ac->programs, &ac->nb_programs, program);
3158 program->discard = AVDISCARD_NONE;
3165 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3167 AVChapter *chapter = NULL;
3170 for(i=0; i<s->nb_chapters; i++)
3171 if(s->chapters[i]->id == id)
3172 chapter = s->chapters[i];
3175 chapter= av_mallocz(sizeof(AVChapter));
3178 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3180 av_dict_set(&chapter->metadata, "title", title, 0);
3182 chapter->time_base= time_base;
3183 chapter->start = start;
3189 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3192 AVProgram *program=NULL;
3195 if (idx >= ac->nb_streams) {
3196 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3200 for(i=0; i<ac->nb_programs; i++){
3201 if(ac->programs[i]->id != progid)
3203 program = ac->programs[i];
3204 for(j=0; j<program->nb_stream_indexes; j++)
3205 if(program->stream_index[j] == idx)
3208 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3211 program->stream_index = tmp;
3212 program->stream_index[program->nb_stream_indexes++] = idx;
3217 static void print_fps(double d, const char *postfix){
3218 uint64_t v= lrintf(d*100);
3219 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3220 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3221 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3224 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3226 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3227 AVDictionaryEntry *tag=NULL;
3229 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3230 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3231 if(strcmp("language", tag->key)){
3232 const char *p = tag->value;
3233 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3236 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3237 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3238 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3240 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3241 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3244 av_log(ctx, AV_LOG_INFO, "\n");
3250 /* "user interface" functions */
3251 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3254 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3255 AVStream *st = ic->streams[i];
3256 int g = av_gcd(st->time_base.num, st->time_base.den);
3257 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3258 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3259 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3260 /* the pid is an important information, so we display it */
3261 /* XXX: add a generic system */
3262 if (flags & AVFMT_SHOW_IDS)
3263 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3265 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3266 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3267 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3268 if (st->sample_aspect_ratio.num && // default
3269 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3270 AVRational display_aspect_ratio;
3271 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3272 st->codec->width*st->sample_aspect_ratio.num,
3273 st->codec->height*st->sample_aspect_ratio.den,
3275 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3276 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3277 display_aspect_ratio.num, display_aspect_ratio.den);
3279 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3280 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3281 print_fps(av_q2d(st->avg_frame_rate), "fps");
3282 #if FF_API_R_FRAME_RATE
3283 if(st->r_frame_rate.den && st->r_frame_rate.num)
3284 print_fps(av_q2d(st->r_frame_rate), "tbr");
3286 if(st->time_base.den && st->time_base.num)
3287 print_fps(1/av_q2d(st->time_base), "tbn");
3288 if(st->codec->time_base.den && st->codec->time_base.num)
3289 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3291 if (st->disposition & AV_DISPOSITION_DEFAULT)
3292 av_log(NULL, AV_LOG_INFO, " (default)");
3293 if (st->disposition & AV_DISPOSITION_DUB)
3294 av_log(NULL, AV_LOG_INFO, " (dub)");
3295 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3296 av_log(NULL, AV_LOG_INFO, " (original)");
3297 if (st->disposition & AV_DISPOSITION_COMMENT)
3298 av_log(NULL, AV_LOG_INFO, " (comment)");
3299 if (st->disposition & AV_DISPOSITION_LYRICS)
3300 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3301 if (st->disposition & AV_DISPOSITION_KARAOKE)
3302 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3303 if (st->disposition & AV_DISPOSITION_FORCED)
3304 av_log(NULL, AV_LOG_INFO, " (forced)");
3305 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3306 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3307 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3308 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3309 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3310 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3311 av_log(NULL, AV_LOG_INFO, "\n");
3312 dump_metadata(NULL, st->metadata, " ");
3315 void av_dump_format(AVFormatContext *ic,
3321 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3322 if (ic->nb_streams && !printed)
3325 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3326 is_output ? "Output" : "Input",
3328 is_output ? ic->oformat->name : ic->iformat->name,
3329 is_output ? "to" : "from", url);
3330 dump_metadata(NULL, ic->metadata, " ");
3332 av_log(NULL, AV_LOG_INFO, " Duration: ");
3333 if (ic->duration != AV_NOPTS_VALUE) {
3334 int hours, mins, secs, us;
3335 secs = ic->duration / AV_TIME_BASE;
3336 us = ic->duration % AV_TIME_BASE;
3341 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3342 (100 * us) / AV_TIME_BASE);
3344 av_log(NULL, AV_LOG_INFO, "N/A");
3346 if (ic->start_time != AV_NOPTS_VALUE) {
3348 av_log(NULL, AV_LOG_INFO, ", start: ");
3349 secs = ic->start_time / AV_TIME_BASE;
3350 us = abs(ic->start_time % AV_TIME_BASE);
3351 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3352 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3354 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3356 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3358 av_log(NULL, AV_LOG_INFO, "N/A");
3360 av_log(NULL, AV_LOG_INFO, "\n");
3362 for (i = 0; i < ic->nb_chapters; i++) {
3363 AVChapter *ch = ic->chapters[i];
3364 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3365 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3366 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3368 dump_metadata(NULL, ch->metadata, " ");
3370 if(ic->nb_programs) {
3371 int j, k, total = 0;
3372 for(j=0; j<ic->nb_programs; j++) {
3373 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3375 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3376 name ? name->value : "");
3377 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3378 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3379 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3380 printed[ic->programs[j]->stream_index[k]] = 1;
3382 total += ic->programs[j]->nb_stream_indexes;
3384 if (total < ic->nb_streams)
3385 av_log(NULL, AV_LOG_INFO, " No Program\n");
3387 for(i=0;i<ic->nb_streams;i++)
3389 dump_stream_format(ic, i, index, is_output);
3394 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3395 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3397 return av_gettime();
3401 uint64_t ff_ntp_time(void)
3403 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3406 int av_get_frame_filename(char *buf, int buf_size,
3407 const char *path, int number)
3410 char *q, buf1[20], c;
3411 int nd, len, percentd_found;
3423 while (isdigit(*p)) {
3424 nd = nd * 10 + *p++ - '0';
3427 } while (isdigit(c));
3436 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3438 if ((q - buf + len) > buf_size - 1)
3440 memcpy(q, buf1, len);
3448 if ((q - buf) < buf_size - 1)
3452 if (!percentd_found)
3461 static void hex_dump_internal(void *avcl, FILE *f, int level,
3462 const uint8_t *buf, int size)
3466 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3468 for(i=0;i<size;i+=16) {
3475 PRINT(" %02x", buf[i+j]);
3480 for(j=0;j<len;j++) {
3482 if (c < ' ' || c > '~')
3491 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3493 hex_dump_internal(NULL, f, 0, buf, size);
3496 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3498 hex_dump_internal(avcl, NULL, level, buf, size);
3501 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3504 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3505 PRINT("stream #%d:\n", pkt->stream_index);
3506 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3507 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3508 /* DTS is _always_ valid after av_read_frame() */
3510 if (pkt->dts == AV_NOPTS_VALUE)
3513 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3514 /* PTS may not be known if B-frames are present. */
3516 if (pkt->pts == AV_NOPTS_VALUE)
3519 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3521 PRINT(" size=%d\n", pkt->size);
3524 av_hex_dump(f, pkt->data, pkt->size);
3528 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3530 AVRational tb = { 1, AV_TIME_BASE };
3531 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3535 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3537 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3541 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3543 AVRational tb = { 1, AV_TIME_BASE };
3544 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3548 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3551 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3554 void av_url_split(char *proto, int proto_size,
3555 char *authorization, int authorization_size,
3556 char *hostname, int hostname_size,
3558 char *path, int path_size,
3561 const char *p, *ls, *ls2, *at, *col, *brk;
3563 if (port_ptr) *port_ptr = -1;
3564 if (proto_size > 0) proto[0] = 0;
3565 if (authorization_size > 0) authorization[0] = 0;
3566 if (hostname_size > 0) hostname[0] = 0;
3567 if (path_size > 0) path[0] = 0;
3569 /* parse protocol */
3570 if ((p = strchr(url, ':'))) {
3571 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3576 /* no protocol means plain filename */
3577 av_strlcpy(path, url, path_size);
3581 /* separate path from hostname */
3582 ls = strchr(p, '/');
3583 ls2 = strchr(p, '?');
3587 ls = FFMIN(ls, ls2);
3589 av_strlcpy(path, ls, path_size);
3591 ls = &p[strlen(p)]; // XXX
3593 /* the rest is hostname, use that to parse auth/port */
3595 /* authorization (user[:pass]@hostname) */
3596 if ((at = strchr(p, '@')) && at < ls) {
3597 av_strlcpy(authorization, p,
3598 FFMIN(authorization_size, at + 1 - p));
3599 p = at + 1; /* skip '@' */
3602 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3604 av_strlcpy(hostname, p + 1,
3605 FFMIN(hostname_size, brk - p));
3606 if (brk[1] == ':' && port_ptr)
3607 *port_ptr = atoi(brk + 2);
3608 } else if ((col = strchr(p, ':')) && col < ls) {
3609 av_strlcpy(hostname, p,
3610 FFMIN(col + 1 - p, hostname_size));
3611 if (port_ptr) *port_ptr = atoi(col + 1);
3613 av_strlcpy(hostname, p,
3614 FFMIN(ls + 1 - p, hostname_size));
3618 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3621 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3624 'C', 'D', 'E', 'F' };
3625 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3628 'c', 'd', 'e', 'f' };
3629 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3631 for(i = 0; i < s; i++) {
3632 buff[i * 2] = hex_table[src[i] >> 4];
3633 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3639 int ff_hex_to_data(uint8_t *data, const char *p)
3646 p += strspn(p, SPACE_CHARS);
3649 c = toupper((unsigned char) *p++);
3650 if (c >= '0' && c <= '9')
3652 else if (c >= 'A' && c <= 'F')
3667 #if FF_API_SET_PTS_INFO
3668 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3669 unsigned int pts_num, unsigned int pts_den)
3671 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3675 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3676 unsigned int pts_num, unsigned int pts_den)
3679 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3680 if(new_tb.num != pts_num)
3681 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3683 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3685 if(new_tb.num <= 0 || new_tb.den <= 0) {
3686 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);
3689 s->time_base = new_tb;
3690 av_codec_set_pkt_timebase(s->codec, new_tb);
3691 s->pts_wrap_bits = pts_wrap_bits;
3694 int ff_url_join(char *str, int size, const char *proto,
3695 const char *authorization, const char *hostname,
3696 int port, const char *fmt, ...)
3699 struct addrinfo hints = { 0 }, *ai;
3704 av_strlcatf(str, size, "%s://", proto);
3705 if (authorization && authorization[0])
3706 av_strlcatf(str, size, "%s@", authorization);
3707 #if CONFIG_NETWORK && defined(AF_INET6)
3708 /* Determine if hostname is a numerical IPv6 address,
3709 * properly escape it within [] in that case. */
3710 hints.ai_flags = AI_NUMERICHOST;
3711 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3712 if (ai->ai_family == AF_INET6) {
3713 av_strlcat(str, "[", size);
3714 av_strlcat(str, hostname, size);
3715 av_strlcat(str, "]", size);
3717 av_strlcat(str, hostname, size);
3722 /* Not an IPv6 address, just output the plain string. */
3723 av_strlcat(str, hostname, size);
3726 av_strlcatf(str, size, ":%d", port);
3729 int len = strlen(str);
3732 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3738 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3739 AVFormatContext *src)
3744 local_pkt.stream_index = dst_stream;
3745 if (pkt->pts != AV_NOPTS_VALUE)
3746 local_pkt.pts = av_rescale_q(pkt->pts,
3747 src->streams[pkt->stream_index]->time_base,
3748 dst->streams[dst_stream]->time_base);
3749 if (pkt->dts != AV_NOPTS_VALUE)
3750 local_pkt.dts = av_rescale_q(pkt->dts,
3751 src->streams[pkt->stream_index]->time_base,
3752 dst->streams[dst_stream]->time_base);
3753 return av_write_frame(dst, &local_pkt);
3756 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3759 const char *ptr = str;
3761 /* Parse key=value pairs. */
3764 char *dest = NULL, *dest_end;
3765 int key_len, dest_len = 0;
3767 /* Skip whitespace and potential commas. */
3768 while (*ptr && (isspace(*ptr) || *ptr == ','))
3775 if (!(ptr = strchr(key, '=')))
3778 key_len = ptr - key;
3780 callback_get_buf(context, key, key_len, &dest, &dest_len);
3781 dest_end = dest + dest_len - 1;
3785 while (*ptr && *ptr != '\"') {
3789 if (dest && dest < dest_end)
3793 if (dest && dest < dest_end)
3801 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3802 if (dest && dest < dest_end)
3810 int ff_find_stream_index(AVFormatContext *s, int id)
3813 for (i = 0; i < s->nb_streams; i++) {
3814 if (s->streams[i]->id == id)
3820 void ff_make_absolute_url(char *buf, int size, const char *base,
3823 char *sep, *path_query;
3824 /* Absolute path, relative to the current server */
3825 if (base && strstr(base, "://") && rel[0] == '/') {
3827 av_strlcpy(buf, base, size);
3828 sep = strstr(buf, "://");
3830 /* Take scheme from base url */
3831 if (rel[1] == '/') {
3834 /* Take scheme and host from base url */
3836 sep = strchr(sep, '/');
3841 av_strlcat(buf, rel, size);
3844 /* If rel actually is an absolute url, just copy it */
3845 if (!base || strstr(rel, "://") || rel[0] == '/') {
3846 av_strlcpy(buf, rel, size);
3850 av_strlcpy(buf, base, size);
3852 /* Strip off any query string from base */
3853 path_query = strchr(buf, '?');
3854 if (path_query != NULL)
3857 /* Is relative path just a new query part? */
3858 if (rel[0] == '?') {
3859 av_strlcat(buf, rel, size);
3863 /* Remove the file name from the base url */
3864 sep = strrchr(buf, '/');
3869 while (av_strstart(rel, "../", NULL) && sep) {
3870 /* Remove the path delimiter at the end */
3872 sep = strrchr(buf, '/');
3873 /* If the next directory name to pop off is "..", break here */
3874 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3875 /* Readd the slash we just removed */
3876 av_strlcat(buf, "/", size);
3879 /* Cut off the directory name */
3886 av_strlcat(buf, rel, size);
3889 int64_t ff_iso8601_to_unix_time(const char *datestr)
3891 struct tm time1 = {0}, time2 = {0};
3893 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3894 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3896 return av_timegm(&time2);
3898 return av_timegm(&time1);
3901 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3904 if (ofmt->query_codec)
3905 return ofmt->query_codec(codec_id, std_compliance);
3906 else if (ofmt->codec_tag)
3907 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3908 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3909 codec_id == ofmt->subtitle_codec)
3912 return AVERROR_PATCHWELCOME;
3915 int avformat_network_init(void)
3919 ff_network_inited_globally = 1;
3920 if ((ret = ff_network_init()) < 0)
3927 int avformat_network_deinit(void)
3936 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3937 uint64_t channel_layout, int32_t sample_rate,
3938 int32_t width, int32_t height)
3944 return AVERROR(EINVAL);
3947 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3949 if (channel_layout) {
3951 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3955 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3957 if (width || height) {
3959 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3961 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3963 return AVERROR(ENOMEM);
3964 bytestream_put_le32(&data, flags);
3966 bytestream_put_le32(&data, channels);
3968 bytestream_put_le64(&data, channel_layout);
3970 bytestream_put_le32(&data, sample_rate);
3971 if (width || height) {
3972 bytestream_put_le32(&data, width);
3973 bytestream_put_le32(&data, height);
3978 const struct AVCodecTag *avformat_get_riff_video_tags(void)
3980 return ff_codec_bmp_tags;
3982 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
3984 return ff_codec_wav_tags;
3987 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
3989 AVRational undef = {0, 1};
3990 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
3991 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
3992 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
3994 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
3995 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
3996 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
3997 stream_sample_aspect_ratio = undef;
3999 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4000 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4001 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4002 frame_sample_aspect_ratio = undef;
4004 if (stream_sample_aspect_ratio.num)
4005 return stream_sample_aspect_ratio;
4007 return frame_sample_aspect_ratio;
4010 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4013 if (*spec <= '9' && *spec >= '0') /* opt:index */
4014 return strtol(spec, NULL, 0) == st->index;
4015 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4016 *spec == 't') { /* opt:[vasdt] */
4017 enum AVMediaType type;
4020 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4021 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4022 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4023 case 'd': type = AVMEDIA_TYPE_DATA; break;
4024 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4025 default: av_assert0(0);
4027 if (type != st->codec->codec_type)
4029 if (*spec++ == ':') { /* possibly followed by :index */
4030 int i, index = strtol(spec, NULL, 0);
4031 for (i = 0; i < s->nb_streams; i++)
4032 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4033 return i == st->index;
4037 } else if (*spec == 'p' && *(spec + 1) == ':') {
4041 prog_id = strtol(spec, &endptr, 0);
4042 for (i = 0; i < s->nb_programs; i++) {
4043 if (s->programs[i]->id != prog_id)
4046 if (*endptr++ == ':') {
4047 int stream_idx = strtol(endptr, NULL, 0);
4048 return stream_idx >= 0 &&
4049 stream_idx < s->programs[i]->nb_stream_indexes &&
4050 st->index == s->programs[i]->stream_index[stream_idx];
4053 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4054 if (st->index == s->programs[i]->stream_index[j])
4058 } else if (*spec == '#') {
4061 sid = strtol(spec + 1, &endptr, 0);
4063 return st->id == sid;
4064 } else if (!*spec) /* empty specifier, matches everything */
4067 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4068 return AVERROR(EINVAL);