2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
298 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
301 lpd.buf = zerobuffer;
303 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
304 int id3len = ff_id3v2_tag_len(lpd.buf);
305 if (lpd.buf_size > id3len + 16) {
307 lpd.buf_size -= id3len;
313 while ((fmt1 = av_iformat_next(fmt1))) {
314 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
317 if (fmt1->read_probe) {
318 score = fmt1->read_probe(&lpd);
319 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
320 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
321 } else if (fmt1->extensions) {
322 if (av_match_ext(lpd.filename, fmt1->extensions)) {
326 if (score > score_max) {
329 }else if (score == score_max)
332 *score_ret= score_max;
337 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
341 if(score_ret > *score_max){
342 *score_max= score_ret;
348 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
350 return av_probe_input_format2(pd, is_opened, &score);
353 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
355 static const struct {
356 const char *name; enum AVCodecID id; enum AVMediaType type;
358 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
359 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
360 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
361 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
362 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
363 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
364 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
365 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
366 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
372 if (fmt && st->request_probe <= score) {
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
390 int av_demuxer_open(AVFormatContext *ic){
393 if (ic->iformat->read_header) {
394 err = ic->iformat->read_header(ic);
399 if (ic->pb && !ic->data_offset)
400 ic->data_offset = avio_tell(ic->pb);
406 /** size of probe buffer, for guessing file type from file contents */
407 #define PROBE_BUF_MIN 2048
408 #define PROBE_BUF_MAX (1<<20)
410 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
411 const char *filename, void *logctx,
412 unsigned int offset, unsigned int max_probe_size)
414 AVProbeData pd = { filename ? filename : "", NULL, -offset };
415 unsigned char *buf = NULL;
416 int ret = 0, probe_size;
418 if (!max_probe_size) {
419 max_probe_size = PROBE_BUF_MAX;
420 } else if (max_probe_size > PROBE_BUF_MAX) {
421 max_probe_size = PROBE_BUF_MAX;
422 } else if (max_probe_size < PROBE_BUF_MIN) {
423 return AVERROR(EINVAL);
426 if (offset >= max_probe_size) {
427 return AVERROR(EINVAL);
430 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
431 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
432 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
433 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
436 if (probe_size < offset) {
440 /* read probe data */
441 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
444 return AVERROR(ENOMEM);
447 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
448 /* fail if error was not end of file, otherwise, lower score */
449 if (ret != AVERROR_EOF) {
454 ret = 0; /* error was end of file, nothing read */
457 pd.buf = &buf[offset];
459 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
461 /* guess file format */
462 *fmt = av_probe_input_format2(&pd, 1, &score);
464 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
465 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
467 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
473 return AVERROR_INVALIDDATA;
476 /* rewind. reuse probe buffer to avoid seeking */
477 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
482 /* open input file and probe the format if necessary */
483 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
486 AVProbeData pd = {filename, NULL, 0};
487 int score = AVPROBE_SCORE_RETRY;
490 s->flags |= AVFMT_FLAG_CUSTOM_IO;
492 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
493 else if (s->iformat->flags & AVFMT_NOFILE)
494 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
495 "will be ignored with AVFMT_NOFILE format.\n");
499 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
500 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
503 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
504 &s->interrupt_callback, options)) < 0)
508 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
511 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
512 AVPacketList **plast_pktl){
513 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
518 (*plast_pktl)->next = pktl;
520 *packet_buffer = pktl;
522 /* add the packet in the buffered packet list */
528 void avformat_queue_attached_pictures(AVFormatContext *s)
531 for (i = 0; i < s->nb_streams; i++)
532 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
533 s->streams[i]->discard < AVDISCARD_ALL) {
534 AVPacket copy = s->streams[i]->attached_pic;
535 copy.destruct = NULL;
536 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
540 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
542 AVFormatContext *s = *ps;
544 AVDictionary *tmp = NULL;
545 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
547 if (!s && !(s = avformat_alloc_context()))
548 return AVERROR(ENOMEM);
550 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
551 return AVERROR(EINVAL);
557 av_dict_copy(&tmp, *options, 0);
559 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
562 if ((ret = init_input(s, filename, &tmp)) < 0)
564 avio_skip(s->pb, s->skip_initial_bytes);
566 /* check filename in case an image number is expected */
567 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
568 if (!av_filename_number_test(filename)) {
569 ret = AVERROR(EINVAL);
574 s->duration = s->start_time = AV_NOPTS_VALUE;
575 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
577 /* allocate private data */
578 if (s->iformat->priv_data_size > 0) {
579 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
580 ret = AVERROR(ENOMEM);
583 if (s->iformat->priv_class) {
584 *(const AVClass**)s->priv_data = s->iformat->priv_class;
585 av_opt_set_defaults(s->priv_data);
586 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
591 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
593 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
595 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
596 if ((ret = s->iformat->read_header(s)) < 0)
599 if (id3v2_extra_meta) {
600 if (!strcmp(s->iformat->name, "mp3")) {
601 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
604 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
606 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
608 avformat_queue_attached_pictures(s);
610 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
611 s->data_offset = avio_tell(s->pb);
613 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
616 av_dict_free(options);
623 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
625 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
627 avformat_free_context(s);
632 /*******************************************************/
634 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
636 if(st->request_probe>0){
637 AVProbeData *pd = &st->probe_data;
639 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
643 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
647 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
648 pd->buf_size += pkt->size;
649 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
652 st->probe_packets = 0;
654 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
659 end= s->raw_packet_buffer_remaining_size <= 0
660 || st->probe_packets<=0;
662 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
663 int score= set_codec_from_probe_data(s, st, pd);
664 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
668 st->request_probe= -1;
669 if(st->codec->codec_id != AV_CODEC_ID_NONE){
670 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
672 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
678 static void force_codec_ids(AVFormatContext *s, AVStream *st)
680 switch(st->codec->codec_type){
681 case AVMEDIA_TYPE_VIDEO:
682 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
684 case AVMEDIA_TYPE_AUDIO:
685 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
687 case AVMEDIA_TYPE_SUBTITLE:
688 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
693 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
699 AVPacketList *pktl = s->raw_packet_buffer;
703 st = s->streams[pkt->stream_index];
704 if(st->request_probe <= 0){
705 s->raw_packet_buffer = pktl->next;
706 s->raw_packet_buffer_remaining_size += pkt->size;
715 ret= s->iformat->read_packet(s, pkt);
717 if (!pktl || ret == AVERROR(EAGAIN))
719 for (i = 0; i < s->nb_streams; i++) {
721 if (st->probe_packets) {
722 probe_codec(s, st, NULL);
724 av_assert0(st->request_probe <= 0);
729 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
730 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
731 av_log(s, AV_LOG_WARNING,
732 "Dropped corrupted packet (stream = %d)\n",
738 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
739 av_packet_merge_side_data(pkt);
741 if(pkt->stream_index >= (unsigned)s->nb_streams){
742 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
746 st= s->streams[pkt->stream_index];
748 force_codec_ids(s, st);
750 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
751 if (s->use_wallclock_as_timestamps)
752 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
754 if(!pktl && st->request_probe <= 0)
757 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
758 s->raw_packet_buffer_remaining_size -= pkt->size;
760 probe_codec(s, st, pkt);
764 #if FF_API_READ_PACKET
765 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
767 return ff_read_packet(s, pkt);
772 /**********************************************************/
774 static int determinable_frame_size(AVCodecContext *avctx)
776 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
777 avctx->codec_id == AV_CODEC_ID_MP1 ||
778 avctx->codec_id == AV_CODEC_ID_MP2 ||
779 avctx->codec_id == AV_CODEC_ID_MP3/* ||
780 avctx->codec_id == AV_CODEC_ID_CELT*/)
786 * Get the number of samples of an audio frame. Return -1 on error.
788 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
792 /* give frame_size priority if demuxing */
793 if (!mux && enc->frame_size > 1)
794 return enc->frame_size;
796 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
799 /* fallback to using frame_size if muxing */
800 if (enc->frame_size > 1)
801 return enc->frame_size;
808 * Return the frame duration in seconds. Return 0 if not available.
810 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
811 AVCodecParserContext *pc, AVPacket *pkt)
817 switch(st->codec->codec_type) {
818 case AVMEDIA_TYPE_VIDEO:
819 if (st->r_frame_rate.num && !pc) {
820 *pnum = st->r_frame_rate.den;
821 *pden = st->r_frame_rate.num;
822 } else if(st->time_base.num*1000LL > st->time_base.den) {
823 *pnum = st->time_base.num;
824 *pden = st->time_base.den;
825 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
826 *pnum = st->codec->time_base.num;
827 *pden = st->codec->time_base.den;
828 if (pc && pc->repeat_pict) {
829 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
830 *pden /= 1 + pc->repeat_pict;
832 *pnum *= 1 + pc->repeat_pict;
834 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
835 //Thus if we have no parser in such case leave duration undefined.
836 if(st->codec->ticks_per_frame>1 && !pc){
841 case AVMEDIA_TYPE_AUDIO:
842 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
843 if (frame_size <= 0 || st->codec->sample_rate <= 0)
846 *pden = st->codec->sample_rate;
853 static int is_intra_only(AVCodecContext *enc){
854 const AVCodecDescriptor *desc;
856 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
859 desc = av_codec_get_codec_descriptor(enc);
861 desc = avcodec_descriptor_get(enc->codec_id);
862 av_codec_set_codec_descriptor(enc, desc);
865 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
869 static int has_decode_delay_been_guessed(AVStream *st)
871 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
872 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
874 #if CONFIG_H264_DECODER
875 if(st->codec->has_b_frames &&
876 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
879 if(st->codec->has_b_frames<3)
880 return st->nb_decoded_frames >= 7;
881 else if(st->codec->has_b_frames<4)
882 return st->nb_decoded_frames >= 18;
884 return st->nb_decoded_frames >= 20;
887 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
891 if (pktl == s->parse_queue_end)
892 return s->packet_buffer;
896 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
897 int64_t dts, int64_t pts)
899 AVStream *st= s->streams[stream_index];
900 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
901 int64_t pts_buffer[MAX_REORDER_DELAY+1];
905 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
908 delay = st->codec->has_b_frames;
909 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
911 shift = st->first_dts - RELATIVE_TS_BASE;
913 for (i=0; i<MAX_REORDER_DELAY+1; i++)
914 pts_buffer[i] = AV_NOPTS_VALUE;
916 if (is_relative(pts))
919 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
920 if(pktl->pkt.stream_index != stream_index)
922 if(is_relative(pktl->pkt.pts))
923 pktl->pkt.pts += shift;
925 if(is_relative(pktl->pkt.dts))
926 pktl->pkt.dts += shift;
928 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
929 st->start_time= pktl->pkt.pts;
931 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
932 pts_buffer[0]= pktl->pkt.pts;
933 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
934 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
935 if(pktl->pkt.dts == AV_NOPTS_VALUE)
936 pktl->pkt.dts= pts_buffer[0];
939 if (st->start_time == AV_NOPTS_VALUE)
940 st->start_time = pts;
943 static void update_initial_durations(AVFormatContext *s, AVStream *st,
944 int stream_index, int duration)
946 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
947 int64_t cur_dts= RELATIVE_TS_BASE;
949 if(st->first_dts != AV_NOPTS_VALUE){
950 cur_dts= st->first_dts;
951 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
952 if(pktl->pkt.stream_index == stream_index){
953 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
958 if(pktl && pktl->pkt.dts != st->first_dts) {
959 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));
963 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
966 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
967 st->first_dts = cur_dts;
968 }else if(st->cur_dts != RELATIVE_TS_BASE)
971 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
972 if(pktl->pkt.stream_index != stream_index)
974 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
975 && !pktl->pkt.duration){
976 pktl->pkt.dts= cur_dts;
977 if(!st->codec->has_b_frames)
978 pktl->pkt.pts= cur_dts;
979 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
980 pktl->pkt.duration = duration;
983 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
986 st->cur_dts= cur_dts;
989 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
990 AVCodecParserContext *pc, AVPacket *pkt)
992 int num, den, presentation_delayed, delay, i;
995 if (s->flags & AVFMT_FLAG_NOFILLIN)
998 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
999 pkt->dts= AV_NOPTS_VALUE;
1001 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1002 //FIXME Set low_delay = 0 when has_b_frames = 1
1003 st->codec->has_b_frames = 1;
1005 /* do we have a video B-frame ? */
1006 delay= st->codec->has_b_frames;
1007 presentation_delayed = 0;
1009 /* XXX: need has_b_frame, but cannot get it if the codec is
1012 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1013 presentation_delayed = 1;
1015 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){
1016 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1017 pkt->dts -= 1LL<<st->pts_wrap_bits;
1019 pkt->pts += 1LL<<st->pts_wrap_bits;
1022 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1023 // we take the conservative approach and discard both
1024 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1025 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1026 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1027 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1028 pkt->dts= AV_NOPTS_VALUE;
1031 if (pkt->duration == 0) {
1032 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1034 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1037 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1038 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1040 /* correct timestamps with byte offset if demuxers only have timestamps
1041 on packet boundaries */
1042 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1043 /* this will estimate bitrate based on this frame's duration and size */
1044 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1045 if(pkt->pts != AV_NOPTS_VALUE)
1047 if(pkt->dts != AV_NOPTS_VALUE)
1051 if (pc && pc->dts_sync_point >= 0) {
1052 // we have synchronization info from the parser
1053 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1055 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1056 if (pkt->dts != AV_NOPTS_VALUE) {
1057 // got DTS from the stream, update reference timestamp
1058 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1059 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1060 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1061 // compute DTS based on reference timestamp
1062 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1063 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1065 if (pc->dts_sync_point > 0)
1066 st->reference_dts = pkt->dts; // new reference
1070 /* This may be redundant, but it should not hurt. */
1071 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1072 presentation_delayed = 1;
1074 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1075 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1076 /* interpolate PTS and DTS if they are not present */
1077 //We skip H264 currently because delay and has_b_frames are not reliably set
1078 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1079 if (presentation_delayed) {
1080 /* DTS = decompression timestamp */
1081 /* PTS = presentation timestamp */
1082 if (pkt->dts == AV_NOPTS_VALUE)
1083 pkt->dts = st->last_IP_pts;
1084 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1085 if (pkt->dts == AV_NOPTS_VALUE)
1086 pkt->dts = st->cur_dts;
1088 /* this is tricky: the dts must be incremented by the duration
1089 of the frame we are displaying, i.e. the last I- or P-frame */
1090 if (st->last_IP_duration == 0)
1091 st->last_IP_duration = pkt->duration;
1092 if(pkt->dts != AV_NOPTS_VALUE)
1093 st->cur_dts = pkt->dts + st->last_IP_duration;
1094 st->last_IP_duration = pkt->duration;
1095 st->last_IP_pts= pkt->pts;
1096 /* cannot compute PTS if not present (we can compute it only
1097 by knowing the future */
1098 } else if (pkt->pts != AV_NOPTS_VALUE ||
1099 pkt->dts != AV_NOPTS_VALUE ||
1101 int duration = pkt->duration;
1103 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1104 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1105 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1106 if( old_diff < new_diff && old_diff < (duration>>3)
1107 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1108 && (!strcmp(s->iformat->name, "mpeg") ||
1109 !strcmp(s->iformat->name, "mpegts"))){
1110 pkt->pts += duration;
1111 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1112 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1113 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1117 /* presentation is not delayed : PTS and DTS are the same */
1118 if (pkt->pts == AV_NOPTS_VALUE)
1119 pkt->pts = pkt->dts;
1120 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1122 if (pkt->pts == AV_NOPTS_VALUE)
1123 pkt->pts = st->cur_dts;
1124 pkt->dts = pkt->pts;
1125 if (pkt->pts != AV_NOPTS_VALUE)
1126 st->cur_dts = pkt->pts + duration;
1130 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1131 st->pts_buffer[0]= pkt->pts;
1132 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1133 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1134 if(pkt->dts == AV_NOPTS_VALUE)
1135 pkt->dts= st->pts_buffer[0];
1137 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1138 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1140 if(pkt->dts > st->cur_dts)
1141 st->cur_dts = pkt->dts;
1143 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1144 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1147 if (is_intra_only(st->codec))
1148 pkt->flags |= AV_PKT_FLAG_KEY;
1150 pkt->convergence_duration = pc->convergence_duration;
1153 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1156 AVPacketList *pktl = *pkt_buf;
1157 *pkt_buf = pktl->next;
1158 av_free_packet(&pktl->pkt);
1161 *pkt_buf_end = NULL;
1165 * Parse a packet, add all split parts to parse_queue
1167 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1169 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1171 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1172 AVStream *st = s->streams[stream_index];
1173 uint8_t *data = pkt ? pkt->data : NULL;
1174 int size = pkt ? pkt->size : 0;
1175 int ret = 0, got_output = 0;
1178 av_init_packet(&flush_pkt);
1181 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1182 // preserve 0-size sync packets
1183 compute_pkt_fields(s, st, st->parser, pkt);
1186 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1189 av_init_packet(&out_pkt);
1190 len = av_parser_parse2(st->parser, st->codec,
1191 &out_pkt.data, &out_pkt.size, data, size,
1192 pkt->pts, pkt->dts, pkt->pos);
1194 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1196 /* increment read pointer */
1200 got_output = !!out_pkt.size;
1205 /* set the duration */
1206 out_pkt.duration = 0;
1207 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1208 if (st->codec->sample_rate > 0) {
1209 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1210 (AVRational){ 1, st->codec->sample_rate },
1214 } else if (st->codec->time_base.num != 0 &&
1215 st->codec->time_base.den != 0) {
1216 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1217 st->codec->time_base,
1222 out_pkt.stream_index = st->index;
1223 out_pkt.pts = st->parser->pts;
1224 out_pkt.dts = st->parser->dts;
1225 out_pkt.pos = st->parser->pos;
1227 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1228 out_pkt.pos = st->parser->frame_offset;
1230 if (st->parser->key_frame == 1 ||
1231 (st->parser->key_frame == -1 &&
1232 st->parser->pict_type == AV_PICTURE_TYPE_I))
1233 out_pkt.flags |= AV_PKT_FLAG_KEY;
1235 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1236 out_pkt.flags |= AV_PKT_FLAG_KEY;
1238 compute_pkt_fields(s, st, st->parser, &out_pkt);
1240 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1241 out_pkt.destruct = pkt->destruct;
1242 pkt->destruct = NULL;
1244 if ((ret = av_dup_packet(&out_pkt)) < 0)
1247 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1248 av_free_packet(&out_pkt);
1249 ret = AVERROR(ENOMEM);
1255 /* end of the stream => close and free the parser */
1256 if (pkt == &flush_pkt) {
1257 av_parser_close(st->parser);
1262 av_free_packet(pkt);
1266 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1267 AVPacketList **pkt_buffer_end,
1271 av_assert0(*pkt_buffer);
1274 *pkt_buffer = pktl->next;
1276 *pkt_buffer_end = NULL;
1281 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1283 int ret = 0, i, got_packet = 0;
1285 av_init_packet(pkt);
1287 while (!got_packet && !s->parse_queue) {
1291 /* read next packet */
1292 ret = ff_read_packet(s, &cur_pkt);
1294 if (ret == AVERROR(EAGAIN))
1296 /* flush the parsers */
1297 for(i = 0; i < s->nb_streams; i++) {
1299 if (st->parser && st->need_parsing)
1300 parse_packet(s, NULL, st->index);
1302 /* all remaining packets are now in parse_queue =>
1303 * really terminate parsing */
1307 st = s->streams[cur_pkt.stream_index];
1309 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1310 cur_pkt.dts != AV_NOPTS_VALUE &&
1311 cur_pkt.pts < cur_pkt.dts) {
1312 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1313 cur_pkt.stream_index,
1314 av_ts2str(cur_pkt.pts),
1315 av_ts2str(cur_pkt.dts),
1318 if (s->debug & FF_FDEBUG_TS)
1319 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1320 cur_pkt.stream_index,
1321 av_ts2str(cur_pkt.pts),
1322 av_ts2str(cur_pkt.dts),
1327 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1328 st->parser = av_parser_init(st->codec->codec_id);
1330 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1331 "%s, packets or times may be invalid.\n",
1332 avcodec_get_name(st->codec->codec_id));
1333 /* no parser available: just output the raw packets */
1334 st->need_parsing = AVSTREAM_PARSE_NONE;
1335 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1336 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1337 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1338 st->parser->flags |= PARSER_FLAG_ONCE;
1339 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1340 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1344 if (!st->need_parsing || !st->parser) {
1345 /* no parsing needed: we just output the packet as is */
1347 compute_pkt_fields(s, st, NULL, pkt);
1348 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1349 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1350 ff_reduce_index(s, st->index);
1351 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1354 } else if (st->discard < AVDISCARD_ALL) {
1355 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1359 av_free_packet(&cur_pkt);
1361 if (pkt->flags & AV_PKT_FLAG_KEY)
1362 st->skip_to_keyframe = 0;
1363 if (st->skip_to_keyframe) {
1364 av_free_packet(&cur_pkt);
1369 if (!got_packet && s->parse_queue)
1370 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1372 if(s->debug & FF_FDEBUG_TS)
1373 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1375 av_ts2str(pkt->pts),
1376 av_ts2str(pkt->dts),
1384 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1386 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1392 ret = s->packet_buffer ?
1393 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1394 read_frame_internal(s, pkt);
1401 AVPacketList *pktl = s->packet_buffer;
1404 AVPacket *next_pkt = &pktl->pkt;
1406 if (next_pkt->dts != AV_NOPTS_VALUE) {
1407 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1408 // last dts seen for this stream. if any of packets following
1409 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1410 int64_t last_dts = next_pkt->dts;
1411 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1412 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1413 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1414 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1415 next_pkt->pts = pktl->pkt.dts;
1417 if (last_dts != AV_NOPTS_VALUE) {
1418 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1419 last_dts = pktl->pkt.dts;
1424 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1425 // Fixing the last reference frame had none pts issue (For MXF etc).
1426 // We only do this when
1428 // 2. we are not able to resolve a pts value for current packet.
1429 // 3. the packets for this stream at the end of the files had valid dts.
1430 next_pkt->pts = last_dts + next_pkt->duration;
1432 pktl = s->packet_buffer;
1435 /* read packet from packet buffer, if there is data */
1436 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1437 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1438 ret = read_from_packet_buffer(&s->packet_buffer,
1439 &s->packet_buffer_end, pkt);
1444 ret = read_frame_internal(s, pkt);
1446 if (pktl && ret != AVERROR(EAGAIN)) {
1453 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1454 &s->packet_buffer_end)) < 0)
1455 return AVERROR(ENOMEM);
1460 st = s->streams[pkt->stream_index];
1461 if (st->skip_samples) {
1462 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1463 AV_WL32(p, st->skip_samples);
1464 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1465 st->skip_samples = 0;
1468 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1469 ff_reduce_index(s, st->index);
1470 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1473 if (is_relative(pkt->dts))
1474 pkt->dts -= RELATIVE_TS_BASE;
1475 if (is_relative(pkt->pts))
1476 pkt->pts -= RELATIVE_TS_BASE;
1481 /* XXX: suppress the packet queue */
1482 static void flush_packet_queue(AVFormatContext *s)
1484 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1485 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1486 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1488 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1491 /*******************************************************/
1494 int av_find_default_stream_index(AVFormatContext *s)
1496 int first_audio_index = -1;
1500 if (s->nb_streams <= 0)
1502 for(i = 0; i < s->nb_streams; i++) {
1504 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1505 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1508 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1509 first_audio_index = i;
1511 return first_audio_index >= 0 ? first_audio_index : 0;
1515 * Flush the frame reader.
1517 void ff_read_frame_flush(AVFormatContext *s)
1522 flush_packet_queue(s);
1524 /* for each stream, reset read state */
1525 for(i = 0; i < s->nb_streams; i++) {
1529 av_parser_close(st->parser);
1532 st->last_IP_pts = AV_NOPTS_VALUE;
1533 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1534 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1535 st->reference_dts = AV_NOPTS_VALUE;
1537 st->probe_packets = MAX_PROBE_PACKETS;
1539 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1540 st->pts_buffer[j]= AV_NOPTS_VALUE;
1544 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1548 for(i = 0; i < s->nb_streams; i++) {
1549 AVStream *st = s->streams[i];
1551 st->cur_dts = av_rescale(timestamp,
1552 st->time_base.den * (int64_t)ref_st->time_base.num,
1553 st->time_base.num * (int64_t)ref_st->time_base.den);
1557 void ff_reduce_index(AVFormatContext *s, int stream_index)
1559 AVStream *st= s->streams[stream_index];
1560 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1562 if((unsigned)st->nb_index_entries >= max_entries){
1564 for(i=0; 2*i<st->nb_index_entries; i++)
1565 st->index_entries[i]= st->index_entries[2*i];
1566 st->nb_index_entries= i;
1570 int ff_add_index_entry(AVIndexEntry **index_entries,
1571 int *nb_index_entries,
1572 unsigned int *index_entries_allocated_size,
1573 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1575 AVIndexEntry *entries, *ie;
1578 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1581 if(timestamp == AV_NOPTS_VALUE)
1582 return AVERROR(EINVAL);
1584 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1585 timestamp -= RELATIVE_TS_BASE;
1587 entries = av_fast_realloc(*index_entries,
1588 index_entries_allocated_size,
1589 (*nb_index_entries + 1) *
1590 sizeof(AVIndexEntry));
1594 *index_entries= entries;
1596 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1599 index= (*nb_index_entries)++;
1600 ie= &entries[index];
1601 assert(index==0 || ie[-1].timestamp < timestamp);
1603 ie= &entries[index];
1604 if(ie->timestamp != timestamp){
1605 if(ie->timestamp <= timestamp)
1607 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1608 (*nb_index_entries)++;
1609 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1610 distance= ie->min_distance;
1614 ie->timestamp = timestamp;
1615 ie->min_distance= distance;
1622 int av_add_index_entry(AVStream *st,
1623 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1625 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1626 &st->index_entries_allocated_size, pos,
1627 timestamp, size, distance, flags);
1630 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1631 int64_t wanted_timestamp, int flags)
1639 //optimize appending index entries at the end
1640 if(b && entries[b-1].timestamp < wanted_timestamp)
1645 timestamp = entries[m].timestamp;
1646 if(timestamp >= wanted_timestamp)
1648 if(timestamp <= wanted_timestamp)
1651 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1653 if(!(flags & AVSEEK_FLAG_ANY)){
1654 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1655 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1664 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1667 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1668 wanted_timestamp, flags);
1671 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1673 AVInputFormat *avif= s->iformat;
1674 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1675 int64_t ts_min, ts_max, ts;
1680 if (stream_index < 0)
1683 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1686 ts_min= AV_NOPTS_VALUE;
1687 pos_limit= -1; //gcc falsely says it may be uninitialized
1689 st= s->streams[stream_index];
1690 if(st->index_entries){
1693 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()
1694 index= FFMAX(index, 0);
1695 e= &st->index_entries[index];
1697 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1699 ts_min= e->timestamp;
1700 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1701 pos_min, av_ts2str(ts_min));
1706 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1707 assert(index < st->nb_index_entries);
1709 e= &st->index_entries[index];
1710 assert(e->timestamp >= target_ts);
1712 ts_max= e->timestamp;
1713 pos_limit= pos_max - e->min_distance;
1714 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1715 pos_max, pos_limit, av_ts2str(ts_max));
1719 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1724 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1727 ff_read_frame_flush(s);
1728 ff_update_cur_dts(s, st, ts);
1733 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1734 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1735 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1736 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1739 int64_t start_pos, filesize;
1742 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1744 if(ts_min == AV_NOPTS_VALUE){
1745 pos_min = s->data_offset;
1746 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1747 if (ts_min == AV_NOPTS_VALUE)
1751 if(ts_min >= target_ts){
1756 if(ts_max == AV_NOPTS_VALUE){
1758 filesize = avio_size(s->pb);
1759 pos_max = filesize - 1;
1762 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1764 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1765 if (ts_max == AV_NOPTS_VALUE)
1769 int64_t tmp_pos= pos_max + 1;
1770 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1771 if(tmp_ts == AV_NOPTS_VALUE)
1775 if(tmp_pos >= filesize)
1781 if(ts_max <= target_ts){
1786 if(ts_min > ts_max){
1788 }else if(ts_min == ts_max){
1793 while (pos_min < pos_limit) {
1794 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1795 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1796 assert(pos_limit <= pos_max);
1799 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1800 // interpolate position (better than dichotomy)
1801 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1802 + pos_min - approximate_keyframe_distance;
1803 }else if(no_change==1){
1804 // bisection, if interpolation failed to change min or max pos last time
1805 pos = (pos_min + pos_limit)>>1;
1807 /* linear search if bisection failed, can only happen if there
1808 are very few or no keyframes between min/max */
1813 else if(pos > pos_limit)
1817 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1822 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1823 pos_min, pos, pos_max,
1824 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1825 pos_limit, start_pos, no_change);
1826 if(ts == AV_NOPTS_VALUE){
1827 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1830 assert(ts != AV_NOPTS_VALUE);
1831 if (target_ts <= ts) {
1832 pos_limit = start_pos - 1;
1836 if (target_ts >= ts) {
1842 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1843 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1846 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1848 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1849 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1850 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1856 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1857 int64_t pos_min, pos_max;
1859 pos_min = s->data_offset;
1860 pos_max = avio_size(s->pb) - 1;
1862 if (pos < pos_min) pos= pos_min;
1863 else if(pos > pos_max) pos= pos_max;
1865 avio_seek(s->pb, pos, SEEK_SET);
1870 static int seek_frame_generic(AVFormatContext *s,
1871 int stream_index, int64_t timestamp, int flags)
1878 st = s->streams[stream_index];
1880 index = av_index_search_timestamp(st, timestamp, flags);
1882 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1885 if(index < 0 || index==st->nb_index_entries-1){
1889 if(st->nb_index_entries){
1890 assert(st->index_entries);
1891 ie= &st->index_entries[st->nb_index_entries-1];
1892 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1894 ff_update_cur_dts(s, st, ie->timestamp);
1896 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1902 read_status = av_read_frame(s, &pkt);
1903 } while (read_status == AVERROR(EAGAIN));
1904 if (read_status < 0)
1906 av_free_packet(&pkt);
1907 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1908 if(pkt.flags & AV_PKT_FLAG_KEY)
1910 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1911 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);
1916 index = av_index_search_timestamp(st, timestamp, flags);
1921 ff_read_frame_flush(s);
1922 if (s->iformat->read_seek){
1923 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1926 ie = &st->index_entries[index];
1927 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1929 ff_update_cur_dts(s, st, ie->timestamp);
1934 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1935 int64_t timestamp, int flags)
1940 if (flags & AVSEEK_FLAG_BYTE) {
1941 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1943 ff_read_frame_flush(s);
1944 return seek_frame_byte(s, stream_index, timestamp, flags);
1947 if(stream_index < 0){
1948 stream_index= av_find_default_stream_index(s);
1949 if(stream_index < 0)
1952 st= s->streams[stream_index];
1953 /* timestamp for default must be expressed in AV_TIME_BASE units */
1954 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1957 /* first, we try the format specific seek */
1958 if (s->iformat->read_seek) {
1959 ff_read_frame_flush(s);
1960 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1967 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1968 ff_read_frame_flush(s);
1969 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1970 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1971 ff_read_frame_flush(s);
1972 return seek_frame_generic(s, stream_index, timestamp, flags);
1978 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1980 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1983 avformat_queue_attached_pictures(s);
1988 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1990 if(min_ts > ts || max_ts < ts)
1993 if (s->iformat->read_seek2) {
1995 ff_read_frame_flush(s);
1996 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1999 avformat_queue_attached_pictures(s);
2003 if(s->iformat->read_timestamp){
2004 //try to seek via read_timestamp()
2007 //Fallback to old API if new is not implemented but old is
2008 //Note the old has somewhat different semantics
2009 if (s->iformat->read_seek || 1) {
2010 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2011 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2012 if (ret<0 && ts != min_ts && max_ts != ts) {
2013 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2015 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2020 // try some generic seek like seek_frame_generic() but with new ts semantics
2023 /*******************************************************/
2026 * Return TRUE if the stream has accurate duration in any stream.
2028 * @return TRUE if the stream has accurate duration for at least one component.
2030 static int has_duration(AVFormatContext *ic)
2035 for(i = 0;i < ic->nb_streams; i++) {
2036 st = ic->streams[i];
2037 if (st->duration != AV_NOPTS_VALUE)
2040 if (ic->duration != AV_NOPTS_VALUE)
2046 * Estimate the stream timings from the one of each components.
2048 * Also computes the global bitrate if possible.
2050 static void update_stream_timings(AVFormatContext *ic)
2052 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2053 int64_t duration, duration1, filesize;
2058 start_time = INT64_MAX;
2059 start_time_text = INT64_MAX;
2060 end_time = INT64_MIN;
2061 duration = INT64_MIN;
2062 for(i = 0;i < ic->nb_streams; i++) {
2063 st = ic->streams[i];
2064 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2065 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2066 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2067 if (start_time1 < start_time_text)
2068 start_time_text = start_time1;
2070 start_time = FFMIN(start_time, start_time1);
2071 end_time1 = AV_NOPTS_VALUE;
2072 if (st->duration != AV_NOPTS_VALUE) {
2073 end_time1 = start_time1
2074 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2075 end_time = FFMAX(end_time, end_time1);
2077 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2078 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2079 p->start_time = start_time1;
2080 if(p->end_time < end_time1)
2081 p->end_time = end_time1;
2084 if (st->duration != AV_NOPTS_VALUE) {
2085 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2086 duration = FFMAX(duration, duration1);
2089 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2090 start_time = start_time_text;
2091 else if(start_time > start_time_text)
2092 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2094 if (start_time != INT64_MAX) {
2095 ic->start_time = start_time;
2096 if (end_time != INT64_MIN) {
2097 if (ic->nb_programs) {
2098 for (i=0; i<ic->nb_programs; i++) {
2099 p = ic->programs[i];
2100 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2101 duration = FFMAX(duration, p->end_time - p->start_time);
2104 duration = FFMAX(duration, end_time - start_time);
2107 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2108 ic->duration = duration;
2110 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2111 /* compute the bitrate */
2112 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2113 (double)ic->duration;
2117 static void fill_all_stream_timings(AVFormatContext *ic)
2122 update_stream_timings(ic);
2123 for(i = 0;i < ic->nb_streams; i++) {
2124 st = ic->streams[i];
2125 if (st->start_time == AV_NOPTS_VALUE) {
2126 if(ic->start_time != AV_NOPTS_VALUE)
2127 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2128 if(ic->duration != AV_NOPTS_VALUE)
2129 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2134 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2136 int64_t filesize, duration;
2140 /* if bit_rate is already set, we believe it */
2141 if (ic->bit_rate <= 0) {
2143 for(i=0;i<ic->nb_streams;i++) {
2144 st = ic->streams[i];
2145 if (st->codec->bit_rate > 0)
2146 bit_rate += st->codec->bit_rate;
2148 ic->bit_rate = bit_rate;
2151 /* if duration is already set, we believe it */
2152 if (ic->duration == AV_NOPTS_VALUE &&
2153 ic->bit_rate != 0) {
2154 filesize = ic->pb ? avio_size(ic->pb) : 0;
2156 for(i = 0; i < ic->nb_streams; i++) {
2157 st = ic->streams[i];
2158 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2159 if (st->duration == AV_NOPTS_VALUE)
2160 st->duration = duration;
2166 #define DURATION_MAX_READ_SIZE 250000LL
2167 #define DURATION_MAX_RETRY 4
2169 /* only usable for MPEG-PS streams */
2170 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2172 AVPacket pkt1, *pkt = &pkt1;
2174 int read_size, i, ret;
2176 int64_t filesize, offset, duration;
2179 /* flush packet queue */
2180 flush_packet_queue(ic);
2182 for (i=0; i<ic->nb_streams; i++) {
2183 st = ic->streams[i];
2184 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2185 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2188 av_parser_close(st->parser);
2193 /* estimate the end time (duration) */
2194 /* XXX: may need to support wrapping */
2195 filesize = ic->pb ? avio_size(ic->pb) : 0;
2196 end_time = AV_NOPTS_VALUE;
2198 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2202 avio_seek(ic->pb, offset, SEEK_SET);
2205 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2209 ret = ff_read_packet(ic, pkt);
2210 } while(ret == AVERROR(EAGAIN));
2213 read_size += pkt->size;
2214 st = ic->streams[pkt->stream_index];
2215 if (pkt->pts != AV_NOPTS_VALUE &&
2216 (st->start_time != AV_NOPTS_VALUE ||
2217 st->first_dts != AV_NOPTS_VALUE)) {
2218 duration = end_time = pkt->pts;
2219 if (st->start_time != AV_NOPTS_VALUE)
2220 duration -= st->start_time;
2222 duration -= st->first_dts;
2224 duration += 1LL<<st->pts_wrap_bits;
2226 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2227 st->duration = duration;
2230 av_free_packet(pkt);
2232 }while( end_time==AV_NOPTS_VALUE
2233 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2234 && ++retry <= DURATION_MAX_RETRY);
2236 fill_all_stream_timings(ic);
2238 avio_seek(ic->pb, old_offset, SEEK_SET);
2239 for (i=0; i<ic->nb_streams; i++) {
2241 st->cur_dts= st->first_dts;
2242 st->last_IP_pts = AV_NOPTS_VALUE;
2243 st->reference_dts = AV_NOPTS_VALUE;
2247 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2251 /* get the file size, if possible */
2252 if (ic->iformat->flags & AVFMT_NOFILE) {
2255 file_size = avio_size(ic->pb);
2256 file_size = FFMAX(0, file_size);
2259 if ((!strcmp(ic->iformat->name, "mpeg") ||
2260 !strcmp(ic->iformat->name, "mpegts")) &&
2261 file_size && ic->pb->seekable) {
2262 /* get accurate estimate from the PTSes */
2263 estimate_timings_from_pts(ic, old_offset);
2264 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2265 } else if (has_duration(ic)) {
2266 /* at least one component has timings - we use them for all
2268 fill_all_stream_timings(ic);
2269 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2271 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2272 /* less precise: use bitrate info */
2273 estimate_timings_from_bit_rate(ic);
2274 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2276 update_stream_timings(ic);
2280 AVStream av_unused *st;
2281 for(i = 0;i < ic->nb_streams; i++) {
2282 st = ic->streams[i];
2283 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2284 (double) st->start_time / AV_TIME_BASE,
2285 (double) st->duration / AV_TIME_BASE);
2287 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2288 (double) ic->start_time / AV_TIME_BASE,
2289 (double) ic->duration / AV_TIME_BASE,
2290 ic->bit_rate / 1000);
2294 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2296 AVCodecContext *avctx = st->codec;
2298 #define FAIL(errmsg) do { \
2300 *errmsg_ptr = errmsg; \
2304 switch (avctx->codec_type) {
2305 case AVMEDIA_TYPE_AUDIO:
2306 if (!avctx->frame_size && determinable_frame_size(avctx))
2307 FAIL("unspecified frame size");
2308 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2309 FAIL("unspecified sample format");
2310 if (!avctx->sample_rate)
2311 FAIL("unspecified sample rate");
2312 if (!avctx->channels)
2313 FAIL("unspecified number of channels");
2314 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2315 FAIL("no decodable DTS frames");
2317 case AVMEDIA_TYPE_VIDEO:
2319 FAIL("unspecified size");
2320 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2321 FAIL("unspecified pixel format");
2323 case AVMEDIA_TYPE_SUBTITLE:
2324 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2325 FAIL("unspecified size");
2327 case AVMEDIA_TYPE_DATA:
2328 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2331 if (avctx->codec_id == AV_CODEC_ID_NONE)
2332 FAIL("unknown codec");
2336 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2337 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2339 const AVCodec *codec;
2340 int got_picture = 1, ret = 0;
2341 AVFrame *frame = avcodec_alloc_frame();
2342 AVSubtitle subtitle;
2343 AVPacket pkt = *avpkt;
2346 return AVERROR(ENOMEM);
2348 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2349 AVDictionary *thread_opt = NULL;
2351 codec = st->codec->codec ? st->codec->codec :
2352 avcodec_find_decoder(st->codec->codec_id);
2355 st->info->found_decoder = -1;
2360 /* force thread count to 1 since the h264 decoder will not extract SPS
2361 * and PPS to extradata during multi-threaded decoding */
2362 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2363 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2365 av_dict_free(&thread_opt);
2367 st->info->found_decoder = -1;
2370 st->info->found_decoder = 1;
2371 } else if (!st->info->found_decoder)
2372 st->info->found_decoder = 1;
2374 if (st->info->found_decoder < 0) {
2379 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2381 (!has_codec_parameters(st, NULL) ||
2382 !has_decode_delay_been_guessed(st) ||
2383 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2385 avcodec_get_frame_defaults(frame);
2386 switch(st->codec->codec_type) {
2387 case AVMEDIA_TYPE_VIDEO:
2388 ret = avcodec_decode_video2(st->codec, frame,
2389 &got_picture, &pkt);
2391 case AVMEDIA_TYPE_AUDIO:
2392 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2394 case AVMEDIA_TYPE_SUBTITLE:
2395 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2396 &got_picture, &pkt);
2404 st->nb_decoded_frames++;
2411 if(!pkt.data && !got_picture)
2415 avcodec_free_frame(&frame);
2419 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2421 while (tags->id != AV_CODEC_ID_NONE) {
2429 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2432 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2433 if(tag == tags[i].tag)
2436 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2437 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2440 return AV_CODEC_ID_NONE;
2443 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2447 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2448 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2449 default: return AV_CODEC_ID_NONE;
2454 if (sflags & (1 << (bps - 1))) {
2456 case 1: return AV_CODEC_ID_PCM_S8;
2457 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2458 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2459 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2460 default: return AV_CODEC_ID_NONE;
2464 case 1: return AV_CODEC_ID_PCM_U8;
2465 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2466 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2467 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2468 default: return AV_CODEC_ID_NONE;
2474 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2477 for(i=0; tags && tags[i]; i++){
2478 int tag= ff_codec_get_tag(tags[i], id);
2484 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2487 for(i=0; tags && tags[i]; i++){
2488 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2489 if(id!=AV_CODEC_ID_NONE) return id;
2491 return AV_CODEC_ID_NONE;
2494 static void compute_chapters_end(AVFormatContext *s)
2497 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2499 for (i = 0; i < s->nb_chapters; i++)
2500 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2501 AVChapter *ch = s->chapters[i];
2502 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2505 for (j = 0; j < s->nb_chapters; j++) {
2506 AVChapter *ch1 = s->chapters[j];
2507 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2508 if (j != i && next_start > ch->start && next_start < end)
2511 ch->end = (end == INT64_MAX) ? ch->start : end;
2515 static int get_std_framerate(int i){
2516 if(i<60*12) return (i+1)*1001;
2517 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2521 * Is the time base unreliable.
2522 * This is a heuristic to balance between quick acceptance of the values in
2523 * the headers vs. some extra checks.
2524 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2525 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2526 * And there are "variable" fps files this needs to detect as well.
2528 static int tb_unreliable(AVCodecContext *c){
2529 if( c->time_base.den >= 101L*c->time_base.num
2530 || c->time_base.den < 5L*c->time_base.num
2531 /* || c->codec_tag == AV_RL32("DIVX")
2532 || c->codec_tag == AV_RL32("XVID")*/
2533 || c->codec_tag == AV_RL32("mp4v")
2534 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2535 || c->codec_id == AV_CODEC_ID_H264
2541 #if FF_API_FORMAT_PARAMETERS
2542 int av_find_stream_info(AVFormatContext *ic)
2544 return avformat_find_stream_info(ic, NULL);
2548 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2550 int i, count, ret, read_size, j;
2552 AVPacket pkt1, *pkt;
2553 int64_t old_offset = avio_tell(ic->pb);
2554 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2555 int flush_codecs = ic->probesize > 0;
2558 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2560 for(i=0;i<ic->nb_streams;i++) {
2561 const AVCodec *codec;
2562 AVDictionary *thread_opt = NULL;
2563 st = ic->streams[i];
2565 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2566 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2567 /* if(!st->time_base.num)
2569 if(!st->codec->time_base.num)
2570 st->codec->time_base= st->time_base;
2572 //only for the split stuff
2573 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2574 st->parser = av_parser_init(st->codec->codec_id);
2576 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2577 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2578 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2579 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2581 } else if (st->need_parsing) {
2582 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2583 "%s, packets or times may be invalid.\n",
2584 avcodec_get_name(st->codec->codec_id));
2587 codec = st->codec->codec ? st->codec->codec :
2588 avcodec_find_decoder(st->codec->codec_id);
2590 /* force thread count to 1 since the h264 decoder will not extract SPS
2591 * and PPS to extradata during multi-threaded decoding */
2592 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2594 /* Ensure that subtitle_header is properly set. */
2595 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2596 && codec && !st->codec->codec)
2597 avcodec_open2(st->codec, codec, options ? &options[i]
2600 //try to just open decoders, in case this is enough to get parameters
2601 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2602 if (codec && !st->codec->codec)
2603 avcodec_open2(st->codec, codec, options ? &options[i]
2607 av_dict_free(&thread_opt);
2610 for (i=0; i<ic->nb_streams; i++) {
2611 #if FF_API_R_FRAME_RATE
2612 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2614 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2615 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2621 if (ff_check_interrupt(&ic->interrupt_callback)){
2623 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2627 /* check if one codec still needs to be handled */
2628 for(i=0;i<ic->nb_streams;i++) {
2629 int fps_analyze_framecount = 20;
2631 st = ic->streams[i];
2632 if (!has_codec_parameters(st, NULL))
2634 /* if the timebase is coarse (like the usual millisecond precision
2635 of mkv), we need to analyze more frames to reliably arrive at
2637 if (av_q2d(st->time_base) > 0.0005)
2638 fps_analyze_framecount *= 2;
2639 if (ic->fps_probe_size >= 0)
2640 fps_analyze_framecount = ic->fps_probe_size;
2641 /* variable fps and no guess at the real fps */
2642 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2643 && st->info->duration_count < fps_analyze_framecount
2644 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2646 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2648 if (st->first_dts == AV_NOPTS_VALUE &&
2649 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2650 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2653 if (i == ic->nb_streams) {
2654 /* NOTE: if the format has no header, then we need to read
2655 some packets to get most of the streams, so we cannot
2657 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2658 /* if we found the info for all the codecs, we can stop */
2660 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2665 /* we did not get all the codec info, but we read too much data */
2666 if (read_size >= ic->probesize) {
2668 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2669 for (i = 0; i < ic->nb_streams; i++)
2670 if (!ic->streams[i]->r_frame_rate.num &&
2671 ic->streams[i]->info->duration_count <= 1)
2672 av_log(ic, AV_LOG_WARNING,
2673 "Stream #%d: not enough frames to estimate rate; "
2674 "consider increasing probesize\n", i);
2678 /* NOTE: a new stream can be added there if no header in file
2679 (AVFMTCTX_NOHEADER) */
2680 ret = read_frame_internal(ic, &pkt1);
2681 if (ret == AVERROR(EAGAIN))
2689 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2692 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2693 &ic->packet_buffer_end);
2694 if ((ret = av_dup_packet(pkt)) < 0)
2695 goto find_stream_info_err;
2698 read_size += pkt->size;
2700 st = ic->streams[pkt->stream_index];
2701 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2702 /* check for non-increasing dts */
2703 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2704 st->info->fps_last_dts >= pkt->dts) {
2705 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2706 "packet %d with DTS %"PRId64", packet %d with DTS "
2707 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2708 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2709 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2711 /* check for a discontinuity in dts - if the difference in dts
2712 * is more than 1000 times the average packet duration in the sequence,
2713 * we treat it as a discontinuity */
2714 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2715 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2716 (pkt->dts - st->info->fps_last_dts) / 1000 >
2717 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2718 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2719 "packet %d with DTS %"PRId64", packet %d with DTS "
2720 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2721 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2722 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2725 /* update stored dts values */
2726 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2727 st->info->fps_first_dts = pkt->dts;
2728 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2730 st->info->fps_last_dts = pkt->dts;
2731 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2733 if (st->codec_info_nb_frames>1) {
2735 if (st->time_base.den > 0)
2736 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2737 if (st->avg_frame_rate.num > 0)
2738 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2740 if (t >= ic->max_analyze_duration) {
2741 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2744 if (pkt->duration) {
2745 st->info->codec_info_duration += pkt->duration;
2746 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2749 #if FF_API_R_FRAME_RATE
2751 int64_t last = st->info->last_dts;
2753 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2754 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2755 int64_t duration= pkt->dts - last;
2757 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2758 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2759 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2760 int framerate= get_std_framerate(i);
2761 double sdts= dts*framerate/(1001*12);
2763 int64_t ticks= llrint(sdts+j*0.5);
2764 double error= sdts - ticks + j*0.5;
2765 st->info->duration_error[j][0][i] += error;
2766 st->info->duration_error[j][1][i] += error*error;
2769 st->info->duration_count++;
2770 // ignore the first 4 values, they might have some random jitter
2771 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2772 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2774 if (pkt->dts != AV_NOPTS_VALUE)
2775 st->info->last_dts = pkt->dts;
2778 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2779 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2780 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2781 st->codec->extradata_size= i;
2782 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2783 if (!st->codec->extradata)
2784 return AVERROR(ENOMEM);
2785 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2786 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2790 /* if still no information, we try to open the codec and to
2791 decompress the frame. We try to avoid that in most cases as
2792 it takes longer and uses more memory. For MPEG-4, we need to
2793 decompress for QuickTime.
2795 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2796 least one frame of codec data, this makes sure the codec initializes
2797 the channel configuration and does not only trust the values from the container.
2799 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2801 st->codec_info_nb_frames++;
2806 AVPacket empty_pkt = { 0 };
2808 av_init_packet(&empty_pkt);
2810 ret = -1; /* we could not have all the codec parameters before EOF */
2811 for(i=0;i<ic->nb_streams;i++) {
2814 st = ic->streams[i];
2816 /* flush the decoders */
2817 if (st->info->found_decoder == 1) {
2819 err = try_decode_frame(st, &empty_pkt,
2820 (options && i < orig_nb_streams) ?
2821 &options[i] : NULL);
2822 } while (err > 0 && !has_codec_parameters(st, NULL));
2825 av_log(ic, AV_LOG_INFO,
2826 "decoding for stream %d failed\n", st->index);
2830 if (!has_codec_parameters(st, &errmsg)) {
2832 avcodec_string(buf, sizeof(buf), st->codec, 0);
2833 av_log(ic, AV_LOG_WARNING,
2834 "Could not find codec parameters for stream %d (%s): %s\n"
2835 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2843 // close codecs which were opened in try_decode_frame()
2844 for(i=0;i<ic->nb_streams;i++) {
2845 st = ic->streams[i];
2846 avcodec_close(st->codec);
2848 for(i=0;i<ic->nb_streams;i++) {
2849 st = ic->streams[i];
2850 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2851 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2852 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2853 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2854 st->codec->codec_tag= tag;
2857 /* estimate average framerate if not set by demuxer */
2858 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2860 double best_error = 0.01;
2862 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2863 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2864 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2866 /* round guessed framerate to a "standard" framerate if it's
2867 * within 1% of the original estimate*/
2868 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2869 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2870 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2872 if (error < best_error) {
2874 best_fps = std_fps.num;
2878 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2879 best_fps, 12*1001, INT_MAX);
2882 // the check for tb_unreliable() is not completely correct, since this is not about handling
2883 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2884 // ipmovie.c produces.
2885 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)
2886 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);
2887 if (st->info->duration_count && !st->r_frame_rate.num
2888 && tb_unreliable(st->codec)) {
2890 double best_error= 0.01;
2892 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2895 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2897 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2900 int n= st->info->duration_count;
2901 double a= st->info->duration_error[k][0][j] / n;
2902 double error= st->info->duration_error[k][1][j]/n - a*a;
2904 if(error < best_error && best_error> 0.000000001){
2906 num = get_std_framerate(j);
2909 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2912 // do not increase frame rate by more than 1 % in order to match a standard rate.
2913 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2914 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2917 if (!st->r_frame_rate.num){
2918 if( st->codec->time_base.den * (int64_t)st->time_base.num
2919 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2920 st->r_frame_rate.num = st->codec->time_base.den;
2921 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2923 st->r_frame_rate.num = st->time_base.den;
2924 st->r_frame_rate.den = st->time_base.num;
2927 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2928 if(!st->codec->bits_per_coded_sample)
2929 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2930 // set stream disposition based on audio service type
2931 switch (st->codec->audio_service_type) {
2932 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2933 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2934 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2935 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2936 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2937 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2938 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2939 st->disposition = AV_DISPOSITION_COMMENT; break;
2940 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2941 st->disposition = AV_DISPOSITION_KARAOKE; break;
2947 estimate_timings(ic, old_offset);
2949 compute_chapters_end(ic);
2951 find_stream_info_err:
2952 for (i=0; i < ic->nb_streams; i++) {
2953 if (ic->streams[i]->codec)
2954 ic->streams[i]->codec->thread_count = 0;
2955 av_freep(&ic->streams[i]->info);
2958 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2962 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2966 for (i = 0; i < ic->nb_programs; i++) {
2967 if (ic->programs[i] == last) {
2971 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2972 if (ic->programs[i]->stream_index[j] == s)
2973 return ic->programs[i];
2979 int av_find_best_stream(AVFormatContext *ic,
2980 enum AVMediaType type,
2981 int wanted_stream_nb,
2983 AVCodec **decoder_ret,
2986 int i, nb_streams = ic->nb_streams;
2987 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
2988 unsigned *program = NULL;
2989 AVCodec *decoder = NULL, *best_decoder = NULL;
2991 if (related_stream >= 0 && wanted_stream_nb < 0) {
2992 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2994 program = p->stream_index;
2995 nb_streams = p->nb_stream_indexes;
2998 for (i = 0; i < nb_streams; i++) {
2999 int real_stream_index = program ? program[i] : i;
3000 AVStream *st = ic->streams[real_stream_index];
3001 AVCodecContext *avctx = st->codec;
3002 if (avctx->codec_type != type)
3004 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3006 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3009 decoder = avcodec_find_decoder(st->codec->codec_id);
3012 ret = AVERROR_DECODER_NOT_FOUND;
3016 count = st->codec_info_nb_frames;
3017 bitrate = avctx->bit_rate;
3018 multiframe = FFMIN(5, count);
3019 if ((best_multiframe > multiframe) ||
3020 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3021 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3024 best_bitrate = bitrate;
3025 best_multiframe = multiframe;
3026 ret = real_stream_index;
3027 best_decoder = decoder;
3028 if (program && i == nb_streams - 1 && ret < 0) {
3030 nb_streams = ic->nb_streams;
3031 i = 0; /* no related stream found, try again with everything */
3035 *decoder_ret = best_decoder;
3039 /*******************************************************/
3041 int av_read_play(AVFormatContext *s)
3043 if (s->iformat->read_play)
3044 return s->iformat->read_play(s);
3046 return avio_pause(s->pb, 0);
3047 return AVERROR(ENOSYS);
3050 int av_read_pause(AVFormatContext *s)
3052 if (s->iformat->read_pause)
3053 return s->iformat->read_pause(s);
3055 return avio_pause(s->pb, 1);
3056 return AVERROR(ENOSYS);
3059 void ff_free_stream(AVFormatContext *s, AVStream *st){
3060 av_assert0(s->nb_streams>0);
3061 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3064 av_parser_close(st->parser);
3066 if (st->attached_pic.data)
3067 av_free_packet(&st->attached_pic);
3068 av_dict_free(&st->metadata);
3069 av_freep(&st->index_entries);
3070 av_freep(&st->codec->extradata);
3071 av_freep(&st->codec->subtitle_header);
3072 av_freep(&st->codec);
3073 av_freep(&st->priv_data);
3074 av_freep(&st->info);
3075 av_freep(&st->probe_data.buf);
3076 av_freep(&s->streams[ --s->nb_streams ]);
3079 void avformat_free_context(AVFormatContext *s)
3087 if (s->iformat && s->iformat->priv_class && s->priv_data)
3088 av_opt_free(s->priv_data);
3090 for(i=s->nb_streams-1; i>=0; i--) {
3091 ff_free_stream(s, s->streams[i]);
3093 for(i=s->nb_programs-1; i>=0; i--) {
3094 av_dict_free(&s->programs[i]->metadata);
3095 av_freep(&s->programs[i]->stream_index);
3096 av_freep(&s->programs[i]);
3098 av_freep(&s->programs);
3099 av_freep(&s->priv_data);
3100 while(s->nb_chapters--) {
3101 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3102 av_freep(&s->chapters[s->nb_chapters]);
3104 av_freep(&s->chapters);
3105 av_dict_free(&s->metadata);
3106 av_freep(&s->streams);
3110 #if FF_API_CLOSE_INPUT_FILE
3111 void av_close_input_file(AVFormatContext *s)
3113 avformat_close_input(&s);
3117 void avformat_close_input(AVFormatContext **ps)
3119 AVFormatContext *s = *ps;
3120 AVIOContext *pb = s->pb;
3122 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3123 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3126 flush_packet_queue(s);
3129 if (s->iformat->read_close)
3130 s->iformat->read_close(s);
3133 avformat_free_context(s);
3140 #if FF_API_NEW_STREAM
3141 AVStream *av_new_stream(AVFormatContext *s, int id)
3143 AVStream *st = avformat_new_stream(s, NULL);
3150 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3156 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3158 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3161 s->streams = streams;
3163 st = av_mallocz(sizeof(AVStream));
3166 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3170 st->info->last_dts = AV_NOPTS_VALUE;
3172 st->codec = avcodec_alloc_context3(c);
3174 /* no default bitrate if decoding */
3175 st->codec->bit_rate = 0;
3177 st->index = s->nb_streams;
3178 st->start_time = AV_NOPTS_VALUE;
3179 st->duration = AV_NOPTS_VALUE;
3180 /* we set the current DTS to 0 so that formats without any timestamps
3181 but durations get some timestamps, formats with some unknown
3182 timestamps have their first few packets buffered and the
3183 timestamps corrected before they are returned to the user */
3184 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3185 st->first_dts = AV_NOPTS_VALUE;
3186 st->probe_packets = MAX_PROBE_PACKETS;
3188 /* default pts setting is MPEG-like */
3189 avpriv_set_pts_info(st, 33, 1, 90000);
3190 st->last_IP_pts = AV_NOPTS_VALUE;
3191 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3192 st->pts_buffer[i]= AV_NOPTS_VALUE;
3193 st->reference_dts = AV_NOPTS_VALUE;
3195 st->sample_aspect_ratio = (AVRational){0,1};
3197 #if FF_API_R_FRAME_RATE
3198 st->info->last_dts = AV_NOPTS_VALUE;
3200 st->info->fps_first_dts = AV_NOPTS_VALUE;
3201 st->info->fps_last_dts = AV_NOPTS_VALUE;
3203 s->streams[s->nb_streams++] = st;
3207 AVProgram *av_new_program(AVFormatContext *ac, int id)
3209 AVProgram *program=NULL;
3212 av_dlog(ac, "new_program: id=0x%04x\n", id);
3214 for(i=0; i<ac->nb_programs; i++)
3215 if(ac->programs[i]->id == id)
3216 program = ac->programs[i];
3219 program = av_mallocz(sizeof(AVProgram));
3222 dynarray_add(&ac->programs, &ac->nb_programs, program);
3223 program->discard = AVDISCARD_NONE;
3227 program->start_time =
3228 program->end_time = AV_NOPTS_VALUE;
3233 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3235 AVChapter *chapter = NULL;
3238 for(i=0; i<s->nb_chapters; i++)
3239 if(s->chapters[i]->id == id)
3240 chapter = s->chapters[i];
3243 chapter= av_mallocz(sizeof(AVChapter));
3246 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3248 av_dict_set(&chapter->metadata, "title", title, 0);
3250 chapter->time_base= time_base;
3251 chapter->start = start;
3257 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3260 AVProgram *program=NULL;
3263 if (idx >= ac->nb_streams) {
3264 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3268 for(i=0; i<ac->nb_programs; i++){
3269 if(ac->programs[i]->id != progid)
3271 program = ac->programs[i];
3272 for(j=0; j<program->nb_stream_indexes; j++)
3273 if(program->stream_index[j] == idx)
3276 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3279 program->stream_index = tmp;
3280 program->stream_index[program->nb_stream_indexes++] = idx;
3285 static void print_fps(double d, const char *postfix){
3286 uint64_t v= lrintf(d*100);
3287 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3288 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3289 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3292 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3294 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3295 AVDictionaryEntry *tag=NULL;
3297 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3298 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3299 if(strcmp("language", tag->key)){
3300 const char *p = tag->value;
3301 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3304 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3305 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3306 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3308 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3309 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3312 av_log(ctx, AV_LOG_INFO, "\n");
3318 /* "user interface" functions */
3319 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3322 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3323 AVStream *st = ic->streams[i];
3324 int g = av_gcd(st->time_base.num, st->time_base.den);
3325 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3326 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3327 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3328 /* the pid is an important information, so we display it */
3329 /* XXX: add a generic system */
3330 if (flags & AVFMT_SHOW_IDS)
3331 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3333 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3334 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3335 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3336 if (st->sample_aspect_ratio.num && // default
3337 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3338 AVRational display_aspect_ratio;
3339 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3340 st->codec->width*st->sample_aspect_ratio.num,
3341 st->codec->height*st->sample_aspect_ratio.den,
3343 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3344 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3345 display_aspect_ratio.num, display_aspect_ratio.den);
3347 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3348 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3349 print_fps(av_q2d(st->avg_frame_rate), "fps");
3350 #if FF_API_R_FRAME_RATE
3351 if(st->r_frame_rate.den && st->r_frame_rate.num)
3352 print_fps(av_q2d(st->r_frame_rate), "tbr");
3354 if(st->time_base.den && st->time_base.num)
3355 print_fps(1/av_q2d(st->time_base), "tbn");
3356 if(st->codec->time_base.den && st->codec->time_base.num)
3357 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3359 if (st->disposition & AV_DISPOSITION_DEFAULT)
3360 av_log(NULL, AV_LOG_INFO, " (default)");
3361 if (st->disposition & AV_DISPOSITION_DUB)
3362 av_log(NULL, AV_LOG_INFO, " (dub)");
3363 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3364 av_log(NULL, AV_LOG_INFO, " (original)");
3365 if (st->disposition & AV_DISPOSITION_COMMENT)
3366 av_log(NULL, AV_LOG_INFO, " (comment)");
3367 if (st->disposition & AV_DISPOSITION_LYRICS)
3368 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3369 if (st->disposition & AV_DISPOSITION_KARAOKE)
3370 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3371 if (st->disposition & AV_DISPOSITION_FORCED)
3372 av_log(NULL, AV_LOG_INFO, " (forced)");
3373 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3374 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3375 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3376 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3377 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3378 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3379 av_log(NULL, AV_LOG_INFO, "\n");
3380 dump_metadata(NULL, st->metadata, " ");
3383 void av_dump_format(AVFormatContext *ic,
3389 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3390 if (ic->nb_streams && !printed)
3393 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3394 is_output ? "Output" : "Input",
3396 is_output ? ic->oformat->name : ic->iformat->name,
3397 is_output ? "to" : "from", url);
3398 dump_metadata(NULL, ic->metadata, " ");
3400 av_log(NULL, AV_LOG_INFO, " Duration: ");
3401 if (ic->duration != AV_NOPTS_VALUE) {
3402 int hours, mins, secs, us;
3403 int64_t duration = ic->duration + 5000;
3404 secs = duration / AV_TIME_BASE;
3405 us = duration % AV_TIME_BASE;
3410 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3411 (100 * us) / AV_TIME_BASE);
3413 av_log(NULL, AV_LOG_INFO, "N/A");
3415 if (ic->start_time != AV_NOPTS_VALUE) {
3417 av_log(NULL, AV_LOG_INFO, ", start: ");
3418 secs = ic->start_time / AV_TIME_BASE;
3419 us = abs(ic->start_time % AV_TIME_BASE);
3420 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3421 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3423 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3425 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3427 av_log(NULL, AV_LOG_INFO, "N/A");
3429 av_log(NULL, AV_LOG_INFO, "\n");
3431 for (i = 0; i < ic->nb_chapters; i++) {
3432 AVChapter *ch = ic->chapters[i];
3433 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3434 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3435 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3437 dump_metadata(NULL, ch->metadata, " ");
3439 if(ic->nb_programs) {
3440 int j, k, total = 0;
3441 for(j=0; j<ic->nb_programs; j++) {
3442 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3444 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3445 name ? name->value : "");
3446 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3447 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3448 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3449 printed[ic->programs[j]->stream_index[k]] = 1;
3451 total += ic->programs[j]->nb_stream_indexes;
3453 if (total < ic->nb_streams)
3454 av_log(NULL, AV_LOG_INFO, " No Program\n");
3456 for(i=0;i<ic->nb_streams;i++)
3458 dump_stream_format(ic, i, index, is_output);
3463 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3464 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3466 return av_gettime();
3470 uint64_t ff_ntp_time(void)
3472 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3475 int av_get_frame_filename(char *buf, int buf_size,
3476 const char *path, int number)
3479 char *q, buf1[20], c;
3480 int nd, len, percentd_found;
3492 while (isdigit(*p)) {
3493 nd = nd * 10 + *p++ - '0';
3496 } while (isdigit(c));
3505 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3507 if ((q - buf + len) > buf_size - 1)
3509 memcpy(q, buf1, len);
3517 if ((q - buf) < buf_size - 1)
3521 if (!percentd_found)
3530 static void hex_dump_internal(void *avcl, FILE *f, int level,
3531 const uint8_t *buf, int size)
3535 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3537 for(i=0;i<size;i+=16) {
3544 PRINT(" %02x", buf[i+j]);
3549 for(j=0;j<len;j++) {
3551 if (c < ' ' || c > '~')
3560 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3562 hex_dump_internal(NULL, f, 0, buf, size);
3565 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3567 hex_dump_internal(avcl, NULL, level, buf, size);
3570 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3573 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3574 PRINT("stream #%d:\n", pkt->stream_index);
3575 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3576 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3577 /* DTS is _always_ valid after av_read_frame() */
3579 if (pkt->dts == AV_NOPTS_VALUE)
3582 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3583 /* PTS may not be known if B-frames are present. */
3585 if (pkt->pts == AV_NOPTS_VALUE)
3588 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3590 PRINT(" size=%d\n", pkt->size);
3593 av_hex_dump(f, pkt->data, pkt->size);
3597 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3599 AVRational tb = { 1, AV_TIME_BASE };
3600 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3604 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3606 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3610 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3612 AVRational tb = { 1, AV_TIME_BASE };
3613 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3617 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3620 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3623 void av_url_split(char *proto, int proto_size,
3624 char *authorization, int authorization_size,
3625 char *hostname, int hostname_size,
3627 char *path, int path_size,
3630 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3632 if (port_ptr) *port_ptr = -1;
3633 if (proto_size > 0) proto[0] = 0;
3634 if (authorization_size > 0) authorization[0] = 0;
3635 if (hostname_size > 0) hostname[0] = 0;
3636 if (path_size > 0) path[0] = 0;
3638 /* parse protocol */
3639 if ((p = strchr(url, ':'))) {
3640 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3645 /* no protocol means plain filename */
3646 av_strlcpy(path, url, path_size);
3650 /* separate path from hostname */
3651 ls = strchr(p, '/');
3652 ls2 = strchr(p, '?');
3656 ls = FFMIN(ls, ls2);
3658 av_strlcpy(path, ls, path_size);
3660 ls = &p[strlen(p)]; // XXX
3662 /* the rest is hostname, use that to parse auth/port */
3664 /* authorization (user[:pass]@hostname) */
3666 while ((at = strchr(p, '@')) && at < ls) {
3667 av_strlcpy(authorization, at2,
3668 FFMIN(authorization_size, at + 1 - at2));
3669 p = at + 1; /* skip '@' */
3672 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3674 av_strlcpy(hostname, p + 1,
3675 FFMIN(hostname_size, brk - p));
3676 if (brk[1] == ':' && port_ptr)
3677 *port_ptr = atoi(brk + 2);
3678 } else if ((col = strchr(p, ':')) && col < ls) {
3679 av_strlcpy(hostname, p,
3680 FFMIN(col + 1 - p, hostname_size));
3681 if (port_ptr) *port_ptr = atoi(col + 1);
3683 av_strlcpy(hostname, p,
3684 FFMIN(ls + 1 - p, hostname_size));
3688 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3691 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3694 'C', 'D', 'E', 'F' };
3695 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3698 'c', 'd', 'e', 'f' };
3699 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3701 for(i = 0; i < s; i++) {
3702 buff[i * 2] = hex_table[src[i] >> 4];
3703 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3709 int ff_hex_to_data(uint8_t *data, const char *p)
3716 p += strspn(p, SPACE_CHARS);
3719 c = toupper((unsigned char) *p++);
3720 if (c >= '0' && c <= '9')
3722 else if (c >= 'A' && c <= 'F')
3737 #if FF_API_SET_PTS_INFO
3738 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3739 unsigned int pts_num, unsigned int pts_den)
3741 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3745 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3746 unsigned int pts_num, unsigned int pts_den)
3749 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3750 if(new_tb.num != pts_num)
3751 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3753 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3755 if(new_tb.num <= 0 || new_tb.den <= 0) {
3756 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);
3759 s->time_base = new_tb;
3760 av_codec_set_pkt_timebase(s->codec, new_tb);
3761 s->pts_wrap_bits = pts_wrap_bits;
3764 int ff_url_join(char *str, int size, const char *proto,
3765 const char *authorization, const char *hostname,
3766 int port, const char *fmt, ...)
3769 struct addrinfo hints = { 0 }, *ai;
3774 av_strlcatf(str, size, "%s://", proto);
3775 if (authorization && authorization[0])
3776 av_strlcatf(str, size, "%s@", authorization);
3777 #if CONFIG_NETWORK && defined(AF_INET6)
3778 /* Determine if hostname is a numerical IPv6 address,
3779 * properly escape it within [] in that case. */
3780 hints.ai_flags = AI_NUMERICHOST;
3781 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3782 if (ai->ai_family == AF_INET6) {
3783 av_strlcat(str, "[", size);
3784 av_strlcat(str, hostname, size);
3785 av_strlcat(str, "]", size);
3787 av_strlcat(str, hostname, size);
3792 /* Not an IPv6 address, just output the plain string. */
3793 av_strlcat(str, hostname, size);
3796 av_strlcatf(str, size, ":%d", port);
3799 int len = strlen(str);
3802 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3808 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3809 AVFormatContext *src)
3814 local_pkt.stream_index = dst_stream;
3815 if (pkt->pts != AV_NOPTS_VALUE)
3816 local_pkt.pts = av_rescale_q(pkt->pts,
3817 src->streams[pkt->stream_index]->time_base,
3818 dst->streams[dst_stream]->time_base);
3819 if (pkt->dts != AV_NOPTS_VALUE)
3820 local_pkt.dts = av_rescale_q(pkt->dts,
3821 src->streams[pkt->stream_index]->time_base,
3822 dst->streams[dst_stream]->time_base);
3823 return av_write_frame(dst, &local_pkt);
3826 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3829 const char *ptr = str;
3831 /* Parse key=value pairs. */
3834 char *dest = NULL, *dest_end;
3835 int key_len, dest_len = 0;
3837 /* Skip whitespace and potential commas. */
3838 while (*ptr && (isspace(*ptr) || *ptr == ','))
3845 if (!(ptr = strchr(key, '=')))
3848 key_len = ptr - key;
3850 callback_get_buf(context, key, key_len, &dest, &dest_len);
3851 dest_end = dest + dest_len - 1;
3855 while (*ptr && *ptr != '\"') {
3859 if (dest && dest < dest_end)
3863 if (dest && dest < dest_end)
3871 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3872 if (dest && dest < dest_end)
3880 int ff_find_stream_index(AVFormatContext *s, int id)
3883 for (i = 0; i < s->nb_streams; i++) {
3884 if (s->streams[i]->id == id)
3890 void ff_make_absolute_url(char *buf, int size, const char *base,
3893 char *sep, *path_query;
3894 /* Absolute path, relative to the current server */
3895 if (base && strstr(base, "://") && rel[0] == '/') {
3897 av_strlcpy(buf, base, size);
3898 sep = strstr(buf, "://");
3900 /* Take scheme from base url */
3901 if (rel[1] == '/') {
3904 /* Take scheme and host from base url */
3906 sep = strchr(sep, '/');
3911 av_strlcat(buf, rel, size);
3914 /* If rel actually is an absolute url, just copy it */
3915 if (!base || strstr(rel, "://") || rel[0] == '/') {
3916 av_strlcpy(buf, rel, size);
3920 av_strlcpy(buf, base, size);
3922 /* Strip off any query string from base */
3923 path_query = strchr(buf, '?');
3924 if (path_query != NULL)
3927 /* Is relative path just a new query part? */
3928 if (rel[0] == '?') {
3929 av_strlcat(buf, rel, size);
3933 /* Remove the file name from the base url */
3934 sep = strrchr(buf, '/');
3939 while (av_strstart(rel, "../", NULL) && sep) {
3940 /* Remove the path delimiter at the end */
3942 sep = strrchr(buf, '/');
3943 /* If the next directory name to pop off is "..", break here */
3944 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3945 /* Readd the slash we just removed */
3946 av_strlcat(buf, "/", size);
3949 /* Cut off the directory name */
3956 av_strlcat(buf, rel, size);
3959 int64_t ff_iso8601_to_unix_time(const char *datestr)
3961 struct tm time1 = {0}, time2 = {0};
3963 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3964 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3966 return av_timegm(&time2);
3968 return av_timegm(&time1);
3971 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3974 if (ofmt->query_codec)
3975 return ofmt->query_codec(codec_id, std_compliance);
3976 else if (ofmt->codec_tag)
3977 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3978 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3979 codec_id == ofmt->subtitle_codec)
3982 return AVERROR_PATCHWELCOME;
3985 int avformat_network_init(void)
3989 ff_network_inited_globally = 1;
3990 if ((ret = ff_network_init()) < 0)
3997 int avformat_network_deinit(void)
4006 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4007 uint64_t channel_layout, int32_t sample_rate,
4008 int32_t width, int32_t height)
4014 return AVERROR(EINVAL);
4017 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4019 if (channel_layout) {
4021 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4025 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4027 if (width || height) {
4029 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4031 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4033 return AVERROR(ENOMEM);
4034 bytestream_put_le32(&data, flags);
4036 bytestream_put_le32(&data, channels);
4038 bytestream_put_le64(&data, channel_layout);
4040 bytestream_put_le32(&data, sample_rate);
4041 if (width || height) {
4042 bytestream_put_le32(&data, width);
4043 bytestream_put_le32(&data, height);
4048 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4050 return ff_codec_bmp_tags;
4052 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4054 return ff_codec_wav_tags;
4057 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4059 AVRational undef = {0, 1};
4060 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4061 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4062 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4064 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4065 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4066 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4067 stream_sample_aspect_ratio = undef;
4069 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4070 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4071 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4072 frame_sample_aspect_ratio = undef;
4074 if (stream_sample_aspect_ratio.num)
4075 return stream_sample_aspect_ratio;
4077 return frame_sample_aspect_ratio;
4080 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4083 if (*spec <= '9' && *spec >= '0') /* opt:index */
4084 return strtol(spec, NULL, 0) == st->index;
4085 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4086 *spec == 't') { /* opt:[vasdt] */
4087 enum AVMediaType type;
4090 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4091 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4092 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4093 case 'd': type = AVMEDIA_TYPE_DATA; break;
4094 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4095 default: av_assert0(0);
4097 if (type != st->codec->codec_type)
4099 if (*spec++ == ':') { /* possibly followed by :index */
4100 int i, index = strtol(spec, NULL, 0);
4101 for (i = 0; i < s->nb_streams; i++)
4102 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4103 return i == st->index;
4107 } else if (*spec == 'p' && *(spec + 1) == ':') {
4111 prog_id = strtol(spec, &endptr, 0);
4112 for (i = 0; i < s->nb_programs; i++) {
4113 if (s->programs[i]->id != prog_id)
4116 if (*endptr++ == ':') {
4117 int stream_idx = strtol(endptr, NULL, 0);
4118 return stream_idx >= 0 &&
4119 stream_idx < s->programs[i]->nb_stream_indexes &&
4120 st->index == s->programs[i]->stream_index[stream_idx];
4123 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4124 if (st->index == s->programs[i]->stream_index[j])
4128 } else if (*spec == '#') {
4131 sid = strtol(spec + 1, &endptr, 0);
4133 return st->id == sid;
4134 } else if (!*spec) /* empty specifier, matches everything */
4137 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4138 return AVERROR(EINVAL);