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
23 #include "avio_internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/raw.h"
27 #include "libavcodec/bytestream.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/pixdesc.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
39 #include "libavutil/timestamp.h"
41 #include "audiointerleave.h"
53 * various utility functions for use within FFmpeg
56 unsigned avformat_version(void)
58 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
59 return LIBAVFORMAT_VERSION_INT;
62 const char *avformat_configuration(void)
64 return FFMPEG_CONFIGURATION;
67 const char *avformat_license(void)
69 #define LICENSE_PREFIX "libavformat license: "
70 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
73 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
75 static int is_relative(int64_t ts) {
76 return ts > (RELATIVE_TS_BASE - (1LL<<48));
80 * Wrap a given time stamp, if there is an indication for an overflow
83 * @param timestamp the time stamp to wrap
84 * @return resulting time stamp
86 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
88 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
89 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
90 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
91 timestamp < st->pts_wrap_reference)
92 return timestamp + (1ULL<<st->pts_wrap_bits);
93 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
94 timestamp >= st->pts_wrap_reference)
95 return timestamp - (1ULL<<st->pts_wrap_bits);
100 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
101 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
102 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
103 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
105 static AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
107 if (st->codec->codec)
108 return st->codec->codec;
110 switch(st->codec->codec_type){
111 case AVMEDIA_TYPE_VIDEO:
112 if(s->video_codec) return s->video_codec;
114 case AVMEDIA_TYPE_AUDIO:
115 if(s->audio_codec) return s->audio_codec;
117 case AVMEDIA_TYPE_SUBTITLE:
118 if(s->subtitle_codec) return s->subtitle_codec;
122 return avcodec_find_decoder(codec_id);
125 int av_format_get_probe_score(const AVFormatContext *s)
127 return s->probe_score;
130 /* an arbitrarily chosen "sane" max packet size -- 50M */
131 #define SANE_CHUNK_SIZE (50000000)
133 int ffio_limit(AVIOContext *s, int size)
136 int64_t remaining= s->maxsize - avio_tell(s);
137 if(remaining < size){
138 int64_t newsize= avio_size(s);
139 if(!s->maxsize || s->maxsize<newsize)
140 s->maxsize= newsize - !newsize;
141 remaining= s->maxsize - avio_tell(s);
142 remaining= FFMAX(remaining, 0);
145 if(s->maxsize>=0 && remaining+1 < size){
146 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
154 * Read the data in sane-sized chunks and append to pkt.
155 * Return the number of bytes read or an error.
157 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
159 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
160 int orig_size = pkt->size;
164 int prev_size = pkt->size;
168 * When the caller requests a lot of data, limit it to the amount left
169 * in file or SANE_CHUNK_SIZE when it is not known
172 if (read_size > SANE_CHUNK_SIZE/10) {
173 read_size = ffio_limit(s, read_size);
174 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
176 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
179 ret = av_grow_packet(pkt, read_size);
183 ret = avio_read(s, pkt->data + prev_size, read_size);
184 if (ret != read_size) {
185 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
192 pkt->flags |= AV_PKT_FLAG_CORRUPT;
197 return pkt->size > orig_size ? pkt->size - orig_size : ret;
200 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
205 pkt->pos = avio_tell(s);
207 return append_packet_chunked(s, pkt, size);
210 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
213 return av_get_packet(s, pkt, size);
214 return append_packet_chunked(s, pkt, size);
218 int av_filename_number_test(const char *filename)
221 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
224 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
226 AVProbeData lpd = *pd;
227 AVInputFormat *fmt1 = NULL, *fmt;
228 int score, nodat = 0, score_max=0;
229 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
232 lpd.buf = zerobuffer;
234 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
235 int id3len = ff_id3v2_tag_len(lpd.buf);
236 if (lpd.buf_size > id3len + 16) {
238 lpd.buf_size -= id3len;
244 while ((fmt1 = av_iformat_next(fmt1))) {
245 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
248 if (fmt1->read_probe) {
249 score = fmt1->read_probe(&lpd);
250 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
251 score = FFMAX(score, nodat ? AVPROBE_SCORE_EXTENSION / 2 - 1 : 1);
252 } else if (fmt1->extensions) {
253 if (av_match_ext(lpd.filename, fmt1->extensions)) {
254 score = AVPROBE_SCORE_EXTENSION;
257 if (score > score_max) {
260 }else if (score == score_max)
264 score_max = FFMIN(AVPROBE_SCORE_EXTENSION / 2 - 1, score_max);
265 *score_ret= score_max;
270 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
273 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
274 if(score_ret > *score_max){
275 *score_max= score_ret;
281 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
283 return av_probe_input_format2(pd, is_opened, &score);
286 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
288 static const struct {
289 const char *name; enum AVCodecID id; enum AVMediaType type;
291 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
292 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
293 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
294 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
295 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
296 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
297 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
298 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
299 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
303 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
305 if (fmt && st->request_probe <= score) {
307 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
308 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
309 for (i = 0; fmt_id_type[i].name; i++) {
310 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
311 st->codec->codec_id = fmt_id_type[i].id;
312 st->codec->codec_type = fmt_id_type[i].type;
320 /************************************************************/
321 /* input media file */
323 int av_demuxer_open(AVFormatContext *ic){
326 if (ic->iformat->read_header) {
327 err = ic->iformat->read_header(ic);
332 if (ic->pb && !ic->data_offset)
333 ic->data_offset = avio_tell(ic->pb);
339 int av_probe_input_buffer2(AVIOContext *pb, AVInputFormat **fmt,
340 const char *filename, void *logctx,
341 unsigned int offset, unsigned int max_probe_size)
343 AVProbeData pd = { filename ? filename : "", NULL, -offset };
344 unsigned char *buf = NULL;
346 int ret = 0, probe_size, buf_offset = 0;
349 if (!max_probe_size) {
350 max_probe_size = PROBE_BUF_MAX;
351 } else if (max_probe_size > PROBE_BUF_MAX) {
352 max_probe_size = PROBE_BUF_MAX;
353 } else if (max_probe_size < PROBE_BUF_MIN) {
354 av_log(logctx, AV_LOG_ERROR,
355 "Specified probe size value %u cannot be < %u\n", max_probe_size, PROBE_BUF_MIN);
356 return AVERROR(EINVAL);
359 if (offset >= max_probe_size) {
360 return AVERROR(EINVAL);
363 if (!*fmt && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
364 if (!av_strcasecmp(mime_type, "audio/aacp")) {
365 *fmt = av_find_input_format("aac");
367 av_freep(&mime_type);
370 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
371 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
373 if (probe_size < offset) {
376 score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
378 /* read probe data */
379 if ((ret = av_reallocp(&buf, probe_size + AVPROBE_PADDING_SIZE)) < 0)
381 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
382 /* fail if error was not end of file, otherwise, lower score */
383 if (ret != AVERROR_EOF) {
388 ret = 0; /* error was end of file, nothing read */
390 pd.buf_size = buf_offset += ret;
391 pd.buf = &buf[offset];
393 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
395 /* guess file format */
396 *fmt = av_probe_input_format2(&pd, 1, &score);
398 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
399 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
401 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
407 return AVERROR_INVALIDDATA;
410 /* rewind. reuse probe buffer to avoid seeking */
411 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
413 return ret < 0 ? ret : score;
416 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
417 const char *filename, void *logctx,
418 unsigned int offset, unsigned int max_probe_size)
420 int ret = av_probe_input_buffer2(pb, fmt, filename, logctx, offset, max_probe_size);
421 return ret < 0 ? ret : 0;
425 /* open input file and probe the format if necessary */
426 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
429 AVProbeData pd = {filename, NULL, 0};
430 int score = AVPROBE_SCORE_RETRY;
433 s->flags |= AVFMT_FLAG_CUSTOM_IO;
435 return av_probe_input_buffer2(s->pb, &s->iformat, filename, s, 0, s->probesize);
436 else if (s->iformat->flags & AVFMT_NOFILE)
437 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
438 "will be ignored with AVFMT_NOFILE format.\n");
442 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
443 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
446 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
447 &s->interrupt_callback, options)) < 0)
451 return av_probe_input_buffer2(s->pb, &s->iformat, filename, s, 0, s->probesize);
454 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
455 AVPacketList **plast_pktl){
456 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
461 (*plast_pktl)->next = pktl;
463 *packet_buffer = pktl;
465 /* add the packet in the buffered packet list */
471 int avformat_queue_attached_pictures(AVFormatContext *s)
474 for (i = 0; i < s->nb_streams; i++)
475 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
476 s->streams[i]->discard < AVDISCARD_ALL) {
477 AVPacket copy = s->streams[i]->attached_pic;
478 copy.buf = av_buffer_ref(copy.buf);
480 return AVERROR(ENOMEM);
482 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
487 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
489 AVFormatContext *s = *ps;
491 AVDictionary *tmp = NULL;
492 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
494 if (!s && !(s = avformat_alloc_context()))
495 return AVERROR(ENOMEM);
497 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
498 return AVERROR(EINVAL);
504 av_dict_copy(&tmp, *options, 0);
506 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
509 if ((ret = init_input(s, filename, &tmp)) < 0)
511 s->probe_score = ret;
512 avio_skip(s->pb, s->skip_initial_bytes);
514 /* check filename in case an image number is expected */
515 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
516 if (!av_filename_number_test(filename)) {
517 ret = AVERROR(EINVAL);
522 s->duration = s->start_time = AV_NOPTS_VALUE;
523 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
525 /* allocate private data */
526 if (s->iformat->priv_data_size > 0) {
527 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
528 ret = AVERROR(ENOMEM);
531 if (s->iformat->priv_class) {
532 *(const AVClass**)s->priv_data = s->iformat->priv_class;
533 av_opt_set_defaults(s->priv_data);
534 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
539 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
541 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
543 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
544 if ((ret = s->iformat->read_header(s)) < 0)
547 if (id3v2_extra_meta) {
548 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
549 !strcmp(s->iformat->name, "tta")) {
550 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
553 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
555 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
557 if ((ret = avformat_queue_attached_pictures(s)) < 0)
560 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
561 s->data_offset = avio_tell(s->pb);
563 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
566 av_dict_free(options);
573 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
575 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
577 avformat_free_context(s);
582 /*******************************************************/
584 static void force_codec_ids(AVFormatContext *s, AVStream *st)
586 switch(st->codec->codec_type){
587 case AVMEDIA_TYPE_VIDEO:
588 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
590 case AVMEDIA_TYPE_AUDIO:
591 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
593 case AVMEDIA_TYPE_SUBTITLE:
594 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
599 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
601 if(st->request_probe>0){
602 AVProbeData *pd = &st->probe_data;
604 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
608 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
610 av_log(s, AV_LOG_WARNING,
611 "Failed to reallocate probe buffer for stream %d\n",
616 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
617 pd->buf_size += pkt->size;
618 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
621 st->probe_packets = 0;
623 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
628 end= s->raw_packet_buffer_remaining_size <= 0
629 || st->probe_packets<=0;
631 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
632 int score= set_codec_from_probe_data(s, st, pd);
633 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
637 st->request_probe= -1;
638 if(st->codec->codec_id != AV_CODEC_ID_NONE){
639 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
641 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
643 force_codec_ids(s, st);
649 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
655 AVPacketList *pktl = s->raw_packet_buffer;
659 st = s->streams[pkt->stream_index];
660 if (s->raw_packet_buffer_remaining_size <= 0) {
661 if ((err = probe_codec(s, st, NULL)) < 0)
664 if(st->request_probe <= 0){
665 s->raw_packet_buffer = pktl->next;
666 s->raw_packet_buffer_remaining_size += pkt->size;
675 ret= s->iformat->read_packet(s, pkt);
677 if (!pktl || ret == AVERROR(EAGAIN))
679 for (i = 0; i < s->nb_streams; i++) {
681 if (st->probe_packets) {
682 if ((err = probe_codec(s, st, NULL)) < 0)
685 av_assert0(st->request_probe <= 0);
690 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
691 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
692 av_log(s, AV_LOG_WARNING,
693 "Dropped corrupted packet (stream = %d)\n",
699 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
700 av_packet_merge_side_data(pkt);
702 if(pkt->stream_index >= (unsigned)s->nb_streams){
703 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
707 st= s->streams[pkt->stream_index];
708 pkt->dts = wrap_timestamp(st, pkt->dts);
709 pkt->pts = wrap_timestamp(st, pkt->pts);
711 force_codec_ids(s, st);
713 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
714 if (s->use_wallclock_as_timestamps)
715 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
717 if(!pktl && st->request_probe <= 0)
720 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
721 s->raw_packet_buffer_remaining_size -= pkt->size;
723 if ((err = probe_codec(s, st, pkt)) < 0)
728 #if FF_API_READ_PACKET
729 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
731 return ff_read_packet(s, pkt);
736 /**********************************************************/
738 static int determinable_frame_size(AVCodecContext *avctx)
740 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
741 avctx->codec_id == AV_CODEC_ID_MP1 ||
742 avctx->codec_id == AV_CODEC_ID_MP2 ||
743 avctx->codec_id == AV_CODEC_ID_MP3/* ||
744 avctx->codec_id == AV_CODEC_ID_CELT*/)
750 * Get the number of samples of an audio frame. Return -1 on error.
752 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
756 /* give frame_size priority if demuxing */
757 if (!mux && enc->frame_size > 1)
758 return enc->frame_size;
760 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
763 /* Fall back on using frame_size if muxing. */
764 if (enc->frame_size > 1)
765 return enc->frame_size;
767 //For WMA we currently have no other means to calculate duration thus we
768 //do it here by assuming CBR, which is true for all known cases.
769 if(!mux && enc->bit_rate>0 && size>0 && enc->sample_rate>0 && enc->block_align>1) {
770 if (enc->codec_id == AV_CODEC_ID_WMAV1 || enc->codec_id == AV_CODEC_ID_WMAV2)
771 return ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
779 * Return the frame duration in seconds. Return 0 if not available.
781 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
782 AVCodecParserContext *pc, AVPacket *pkt)
788 switch(st->codec->codec_type) {
789 case AVMEDIA_TYPE_VIDEO:
790 if (st->r_frame_rate.num && !pc) {
791 *pnum = st->r_frame_rate.den;
792 *pden = st->r_frame_rate.num;
793 } else if(st->time_base.num*1000LL > st->time_base.den) {
794 *pnum = st->time_base.num;
795 *pden = st->time_base.den;
796 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
797 *pnum = st->codec->time_base.num;
798 *pden = st->codec->time_base.den;
799 if (pc && pc->repeat_pict) {
800 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
801 *pden /= 1 + pc->repeat_pict;
803 *pnum *= 1 + pc->repeat_pict;
805 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
806 //Thus if we have no parser in such case leave duration undefined.
807 if(st->codec->ticks_per_frame>1 && !pc){
812 case AVMEDIA_TYPE_AUDIO:
813 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
814 if (frame_size <= 0 || st->codec->sample_rate <= 0)
817 *pden = st->codec->sample_rate;
824 static int is_intra_only(AVCodecContext *enc){
825 const AVCodecDescriptor *desc;
827 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
830 desc = av_codec_get_codec_descriptor(enc);
832 desc = avcodec_descriptor_get(enc->codec_id);
833 av_codec_set_codec_descriptor(enc, desc);
836 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
840 static int has_decode_delay_been_guessed(AVStream *st)
842 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
843 if(!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
845 #if CONFIG_H264_DECODER
846 if(st->codec->has_b_frames &&
847 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
850 if(st->codec->has_b_frames<3)
851 return st->nb_decoded_frames >= 7;
852 else if(st->codec->has_b_frames<4)
853 return st->nb_decoded_frames >= 18;
855 return st->nb_decoded_frames >= 20;
858 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
862 if (pktl == s->parse_queue_end)
863 return s->packet_buffer;
867 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index)
869 if (s->correct_ts_overflow && st->pts_wrap_bits < 63 &&
870 st->pts_wrap_reference == AV_NOPTS_VALUE && st->first_dts != AV_NOPTS_VALUE) {
873 // reference time stamp should be 60 s before first time stamp
874 int64_t pts_wrap_reference = st->first_dts - av_rescale(60, st->time_base.den, st->time_base.num);
875 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
876 int pts_wrap_behavior = (st->first_dts < (1LL<<st->pts_wrap_bits) - (1LL<<st->pts_wrap_bits-3)) ||
877 (st->first_dts < (1LL<<st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
878 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
880 AVProgram *first_program = av_find_program_from_stream(s, NULL, stream_index);
882 if (!first_program) {
883 int default_stream_index = av_find_default_stream_index(s);
884 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
885 for (i=0; i<s->nb_streams; i++) {
886 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
887 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
891 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
892 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
896 AVProgram *program = first_program;
898 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
899 pts_wrap_reference = program->pts_wrap_reference;
900 pts_wrap_behavior = program->pts_wrap_behavior;
903 program = av_find_program_from_stream(s, program, stream_index);
906 // update every program with differing pts_wrap_reference
907 program = first_program;
909 if (program->pts_wrap_reference != pts_wrap_reference) {
910 for (i=0; i<program->nb_stream_indexes; i++) {
911 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
912 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
915 program->pts_wrap_reference = pts_wrap_reference;
916 program->pts_wrap_behavior = pts_wrap_behavior;
918 program = av_find_program_from_stream(s, program, stream_index);
926 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
927 int64_t dts, int64_t pts, AVPacket *pkt)
929 AVStream *st= s->streams[stream_index];
930 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
931 int64_t pts_buffer[MAX_REORDER_DELAY+1];
935 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
938 delay = st->codec->has_b_frames;
939 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
941 shift = st->first_dts - RELATIVE_TS_BASE;
943 for (i=0; i<MAX_REORDER_DELAY+1; i++)
944 pts_buffer[i] = AV_NOPTS_VALUE;
946 if (is_relative(pts))
949 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
950 if(pktl->pkt.stream_index != stream_index)
952 if(is_relative(pktl->pkt.pts))
953 pktl->pkt.pts += shift;
955 if(is_relative(pktl->pkt.dts))
956 pktl->pkt.dts += shift;
958 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
959 st->start_time= pktl->pkt.pts;
961 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
962 pts_buffer[0]= pktl->pkt.pts;
963 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
964 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
965 if(pktl->pkt.dts == AV_NOPTS_VALUE)
966 pktl->pkt.dts= pts_buffer[0];
970 if (update_wrap_reference(s, st, stream_index) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
971 // correct first time stamps to negative values
972 st->first_dts = wrap_timestamp(st, st->first_dts);
973 st->cur_dts = wrap_timestamp(st, st->cur_dts);
974 pkt->dts = wrap_timestamp(st, pkt->dts);
975 pkt->pts = wrap_timestamp(st, pkt->pts);
976 pts = wrap_timestamp(st, pts);
979 if (st->start_time == AV_NOPTS_VALUE)
980 st->start_time = pts;
983 static void update_initial_durations(AVFormatContext *s, AVStream *st,
984 int stream_index, int duration)
986 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
987 int64_t cur_dts= RELATIVE_TS_BASE;
989 if(st->first_dts != AV_NOPTS_VALUE){
990 cur_dts= st->first_dts;
991 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
992 if(pktl->pkt.stream_index == stream_index){
993 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
998 if(pktl && pktl->pkt.dts != st->first_dts) {
999 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in the queue\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
1003 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1006 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
1007 st->first_dts = cur_dts;
1008 }else if(st->cur_dts != RELATIVE_TS_BASE)
1011 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
1012 if(pktl->pkt.stream_index != stream_index)
1014 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
1015 && !pktl->pkt.duration){
1016 pktl->pkt.dts= cur_dts;
1017 if(!st->codec->has_b_frames)
1018 pktl->pkt.pts= cur_dts;
1019 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1020 pktl->pkt.duration = duration;
1023 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1026 st->cur_dts= cur_dts;
1029 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1030 AVCodecParserContext *pc, AVPacket *pkt)
1032 int num, den, presentation_delayed, delay, i;
1035 if (s->flags & AVFMT_FLAG_NOFILLIN)
1038 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1039 pkt->dts= AV_NOPTS_VALUE;
1041 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1042 //FIXME Set low_delay = 0 when has_b_frames = 1
1043 st->codec->has_b_frames = 1;
1045 /* do we have a video B-frame ? */
1046 delay= st->codec->has_b_frames;
1047 presentation_delayed = 0;
1049 /* XXX: need has_b_frame, but cannot get it if the codec is
1052 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1053 presentation_delayed = 1;
1055 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1056 st->pts_wrap_bits < 63 &&
1057 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1058 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1059 pkt->dts -= 1LL<<st->pts_wrap_bits;
1061 pkt->pts += 1LL<<st->pts_wrap_bits;
1064 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1065 // we take the conservative approach and discard both
1066 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1067 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1068 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1069 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1070 pkt->dts= AV_NOPTS_VALUE;
1073 if (pkt->duration == 0) {
1074 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1076 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1079 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1080 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1082 /* correct timestamps with byte offset if demuxers only have timestamps
1083 on packet boundaries */
1084 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1085 /* this will estimate bitrate based on this frame's duration and size */
1086 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1087 if(pkt->pts != AV_NOPTS_VALUE)
1089 if(pkt->dts != AV_NOPTS_VALUE)
1093 if (pc && pc->dts_sync_point >= 0) {
1094 // we have synchronization info from the parser
1095 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1097 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1098 if (pkt->dts != AV_NOPTS_VALUE) {
1099 // got DTS from the stream, update reference timestamp
1100 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1101 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1102 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1103 // compute DTS based on reference timestamp
1104 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1105 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1107 if (pc->dts_sync_point > 0)
1108 st->reference_dts = pkt->dts; // new reference
1112 /* This may be redundant, but it should not hurt. */
1113 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1114 presentation_delayed = 1;
1116 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1117 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1118 /* interpolate PTS and DTS if they are not present */
1119 //We skip H264 currently because delay and has_b_frames are not reliably set
1120 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1121 if (presentation_delayed) {
1122 /* DTS = decompression timestamp */
1123 /* PTS = presentation timestamp */
1124 if (pkt->dts == AV_NOPTS_VALUE)
1125 pkt->dts = st->last_IP_pts;
1126 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1127 if (pkt->dts == AV_NOPTS_VALUE)
1128 pkt->dts = st->cur_dts;
1130 /* this is tricky: the dts must be incremented by the duration
1131 of the frame we are displaying, i.e. the last I- or P-frame */
1132 if (st->last_IP_duration == 0)
1133 st->last_IP_duration = pkt->duration;
1134 if(pkt->dts != AV_NOPTS_VALUE)
1135 st->cur_dts = pkt->dts + st->last_IP_duration;
1136 st->last_IP_duration = pkt->duration;
1137 st->last_IP_pts= pkt->pts;
1138 /* cannot compute PTS if not present (we can compute it only
1139 by knowing the future */
1140 } else if (pkt->pts != AV_NOPTS_VALUE ||
1141 pkt->dts != AV_NOPTS_VALUE ||
1143 int duration = pkt->duration;
1145 /* presentation is not delayed : PTS and DTS are the same */
1146 if (pkt->pts == AV_NOPTS_VALUE)
1147 pkt->pts = pkt->dts;
1148 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1150 if (pkt->pts == AV_NOPTS_VALUE)
1151 pkt->pts = st->cur_dts;
1152 pkt->dts = pkt->pts;
1153 if (pkt->pts != AV_NOPTS_VALUE)
1154 st->cur_dts = pkt->pts + duration;
1158 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1159 st->pts_buffer[0]= pkt->pts;
1160 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1161 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1162 if(pkt->dts == AV_NOPTS_VALUE)
1163 pkt->dts= st->pts_buffer[0];
1165 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1166 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); // this should happen on the first packet
1168 if(pkt->dts > st->cur_dts)
1169 st->cur_dts = pkt->dts;
1171 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1172 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1175 if (is_intra_only(st->codec))
1176 pkt->flags |= AV_PKT_FLAG_KEY;
1178 pkt->convergence_duration = pc->convergence_duration;
1181 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1184 AVPacketList *pktl = *pkt_buf;
1185 *pkt_buf = pktl->next;
1186 av_free_packet(&pktl->pkt);
1189 *pkt_buf_end = NULL;
1193 * Parse a packet, add all split parts to parse_queue
1195 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1197 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1199 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1200 AVStream *st = s->streams[stream_index];
1201 uint8_t *data = pkt ? pkt->data : NULL;
1202 int size = pkt ? pkt->size : 0;
1203 int ret = 0, got_output = 0;
1206 av_init_packet(&flush_pkt);
1209 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1210 // preserve 0-size sync packets
1211 compute_pkt_fields(s, st, st->parser, pkt);
1214 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1217 av_init_packet(&out_pkt);
1218 len = av_parser_parse2(st->parser, st->codec,
1219 &out_pkt.data, &out_pkt.size, data, size,
1220 pkt->pts, pkt->dts, pkt->pos);
1222 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1224 /* increment read pointer */
1228 got_output = !!out_pkt.size;
1233 if (pkt->side_data) {
1234 out_pkt.side_data = pkt->side_data;
1235 out_pkt.side_data_elems = pkt->side_data_elems;
1236 pkt->side_data = NULL;
1237 pkt->side_data_elems = 0;
1240 /* set the duration */
1241 out_pkt.duration = 0;
1242 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1243 if (st->codec->sample_rate > 0) {
1244 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1245 (AVRational){ 1, st->codec->sample_rate },
1249 } else if (st->codec->time_base.num != 0 &&
1250 st->codec->time_base.den != 0) {
1251 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1252 st->codec->time_base,
1257 out_pkt.stream_index = st->index;
1258 out_pkt.pts = st->parser->pts;
1259 out_pkt.dts = st->parser->dts;
1260 out_pkt.pos = st->parser->pos;
1262 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1263 out_pkt.pos = st->parser->frame_offset;
1265 if (st->parser->key_frame == 1 ||
1266 (st->parser->key_frame == -1 &&
1267 st->parser->pict_type == AV_PICTURE_TYPE_I))
1268 out_pkt.flags |= AV_PKT_FLAG_KEY;
1270 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1271 out_pkt.flags |= AV_PKT_FLAG_KEY;
1273 compute_pkt_fields(s, st, st->parser, &out_pkt);
1275 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1276 out_pkt.buf = pkt->buf;
1278 #if FF_API_DESTRUCT_PACKET
1279 FF_DISABLE_DEPRECATION_WARNINGS
1280 out_pkt.destruct = pkt->destruct;
1281 pkt->destruct = NULL;
1282 FF_ENABLE_DEPRECATION_WARNINGS
1285 if ((ret = av_dup_packet(&out_pkt)) < 0)
1288 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1289 av_free_packet(&out_pkt);
1290 ret = AVERROR(ENOMEM);
1296 /* end of the stream => close and free the parser */
1297 if (pkt == &flush_pkt) {
1298 av_parser_close(st->parser);
1303 av_free_packet(pkt);
1307 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1308 AVPacketList **pkt_buffer_end,
1312 av_assert0(*pkt_buffer);
1315 *pkt_buffer = pktl->next;
1317 *pkt_buffer_end = NULL;
1322 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1324 int ret = 0, i, got_packet = 0;
1326 av_init_packet(pkt);
1328 while (!got_packet && !s->parse_queue) {
1332 /* read next packet */
1333 ret = ff_read_packet(s, &cur_pkt);
1335 if (ret == AVERROR(EAGAIN))
1337 /* flush the parsers */
1338 for(i = 0; i < s->nb_streams; i++) {
1340 if (st->parser && st->need_parsing)
1341 parse_packet(s, NULL, st->index);
1343 /* all remaining packets are now in parse_queue =>
1344 * really terminate parsing */
1348 st = s->streams[cur_pkt.stream_index];
1350 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1351 cur_pkt.dts != AV_NOPTS_VALUE &&
1352 cur_pkt.pts < cur_pkt.dts) {
1353 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1354 cur_pkt.stream_index,
1355 av_ts2str(cur_pkt.pts),
1356 av_ts2str(cur_pkt.dts),
1359 if (s->debug & FF_FDEBUG_TS)
1360 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1361 cur_pkt.stream_index,
1362 av_ts2str(cur_pkt.pts),
1363 av_ts2str(cur_pkt.dts),
1368 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1369 st->parser = av_parser_init(st->codec->codec_id);
1371 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1372 "%s, packets or times may be invalid.\n",
1373 avcodec_get_name(st->codec->codec_id));
1374 /* no parser available: just output the raw packets */
1375 st->need_parsing = AVSTREAM_PARSE_NONE;
1376 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1377 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1378 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1379 st->parser->flags |= PARSER_FLAG_ONCE;
1380 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1381 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1385 if (!st->need_parsing || !st->parser) {
1386 /* no parsing needed: we just output the packet as is */
1388 compute_pkt_fields(s, st, NULL, pkt);
1389 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1390 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1391 ff_reduce_index(s, st->index);
1392 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1395 } else if (st->discard < AVDISCARD_ALL) {
1396 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1400 av_free_packet(&cur_pkt);
1402 if (pkt->flags & AV_PKT_FLAG_KEY)
1403 st->skip_to_keyframe = 0;
1404 if (st->skip_to_keyframe) {
1405 av_free_packet(&cur_pkt);
1413 if (!got_packet && s->parse_queue)
1414 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1416 if(s->debug & FF_FDEBUG_TS)
1417 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1419 av_ts2str(pkt->pts),
1420 av_ts2str(pkt->dts),
1428 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1430 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1436 ret = s->packet_buffer ?
1437 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1438 read_frame_internal(s, pkt);
1445 AVPacketList *pktl = s->packet_buffer;
1448 AVPacket *next_pkt = &pktl->pkt;
1450 if (next_pkt->dts != AV_NOPTS_VALUE) {
1451 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1452 // last dts seen for this stream. if any of packets following
1453 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1454 int64_t last_dts = next_pkt->dts;
1455 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1456 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1457 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1458 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1459 next_pkt->pts = pktl->pkt.dts;
1461 if (last_dts != AV_NOPTS_VALUE) {
1462 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1463 last_dts = pktl->pkt.dts;
1468 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1469 // Fixing the last reference frame had none pts issue (For MXF etc).
1470 // We only do this when
1472 // 2. we are not able to resolve a pts value for current packet.
1473 // 3. the packets for this stream at the end of the files had valid dts.
1474 next_pkt->pts = last_dts + next_pkt->duration;
1476 pktl = s->packet_buffer;
1479 /* read packet from packet buffer, if there is data */
1480 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1481 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1482 ret = read_from_packet_buffer(&s->packet_buffer,
1483 &s->packet_buffer_end, pkt);
1488 ret = read_frame_internal(s, pkt);
1490 if (pktl && ret != AVERROR(EAGAIN)) {
1497 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1498 &s->packet_buffer_end)) < 0)
1499 return AVERROR(ENOMEM);
1504 st = s->streams[pkt->stream_index];
1505 if (st->skip_samples) {
1506 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1508 AV_WL32(p, st->skip_samples);
1509 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1511 st->skip_samples = 0;
1514 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1515 ff_reduce_index(s, st->index);
1516 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1519 if (is_relative(pkt->dts))
1520 pkt->dts -= RELATIVE_TS_BASE;
1521 if (is_relative(pkt->pts))
1522 pkt->pts -= RELATIVE_TS_BASE;
1527 /* XXX: suppress the packet queue */
1528 static void flush_packet_queue(AVFormatContext *s)
1530 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1531 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1532 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1534 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1537 /*******************************************************/
1540 int av_find_default_stream_index(AVFormatContext *s)
1542 int first_audio_index = -1;
1546 if (s->nb_streams <= 0)
1548 for(i = 0; i < s->nb_streams; i++) {
1550 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1551 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1554 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1555 first_audio_index = i;
1557 return first_audio_index >= 0 ? first_audio_index : 0;
1561 * Flush the frame reader.
1563 void ff_read_frame_flush(AVFormatContext *s)
1568 flush_packet_queue(s);
1570 /* for each stream, reset read state */
1571 for(i = 0; i < s->nb_streams; i++) {
1575 av_parser_close(st->parser);
1578 st->last_IP_pts = AV_NOPTS_VALUE;
1579 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1580 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1581 st->reference_dts = AV_NOPTS_VALUE;
1583 st->probe_packets = MAX_PROBE_PACKETS;
1585 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1586 st->pts_buffer[j]= AV_NOPTS_VALUE;
1590 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1594 for(i = 0; i < s->nb_streams; i++) {
1595 AVStream *st = s->streams[i];
1597 st->cur_dts = av_rescale(timestamp,
1598 st->time_base.den * (int64_t)ref_st->time_base.num,
1599 st->time_base.num * (int64_t)ref_st->time_base.den);
1603 void ff_reduce_index(AVFormatContext *s, int stream_index)
1605 AVStream *st= s->streams[stream_index];
1606 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1608 if((unsigned)st->nb_index_entries >= max_entries){
1610 for(i=0; 2*i<st->nb_index_entries; i++)
1611 st->index_entries[i]= st->index_entries[2*i];
1612 st->nb_index_entries= i;
1616 int ff_add_index_entry(AVIndexEntry **index_entries,
1617 int *nb_index_entries,
1618 unsigned int *index_entries_allocated_size,
1619 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1621 AVIndexEntry *entries, *ie;
1624 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1627 if(timestamp == AV_NOPTS_VALUE)
1628 return AVERROR(EINVAL);
1630 if (size < 0 || size > 0x3FFFFFFF)
1631 return AVERROR(EINVAL);
1633 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1634 timestamp -= RELATIVE_TS_BASE;
1636 entries = av_fast_realloc(*index_entries,
1637 index_entries_allocated_size,
1638 (*nb_index_entries + 1) *
1639 sizeof(AVIndexEntry));
1643 *index_entries= entries;
1645 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1648 index= (*nb_index_entries)++;
1649 ie= &entries[index];
1650 av_assert0(index==0 || ie[-1].timestamp < timestamp);
1652 ie= &entries[index];
1653 if(ie->timestamp != timestamp){
1654 if(ie->timestamp <= timestamp)
1656 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1657 (*nb_index_entries)++;
1658 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1659 distance= ie->min_distance;
1663 ie->timestamp = timestamp;
1664 ie->min_distance= distance;
1671 int av_add_index_entry(AVStream *st,
1672 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1674 timestamp = wrap_timestamp(st, timestamp);
1675 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1676 &st->index_entries_allocated_size, pos,
1677 timestamp, size, distance, flags);
1680 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1681 int64_t wanted_timestamp, int flags)
1689 //optimize appending index entries at the end
1690 if(b && entries[b-1].timestamp < wanted_timestamp)
1695 timestamp = entries[m].timestamp;
1696 if(timestamp >= wanted_timestamp)
1698 if(timestamp <= wanted_timestamp)
1701 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1703 if(!(flags & AVSEEK_FLAG_ANY)){
1704 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1705 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1714 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1717 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1718 wanted_timestamp, flags);
1721 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1722 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1724 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1725 if (stream_index >= 0)
1726 ts = wrap_timestamp(s->streams[stream_index], ts);
1730 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1732 AVInputFormat *avif= s->iformat;
1733 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1734 int64_t ts_min, ts_max, ts;
1739 if (stream_index < 0)
1742 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1745 ts_min= AV_NOPTS_VALUE;
1746 pos_limit= -1; //gcc falsely says it may be uninitialized
1748 st= s->streams[stream_index];
1749 if(st->index_entries){
1752 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()
1753 index= FFMAX(index, 0);
1754 e= &st->index_entries[index];
1756 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1758 ts_min= e->timestamp;
1759 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1760 pos_min, av_ts2str(ts_min));
1762 av_assert1(index==0);
1765 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1766 av_assert0(index < st->nb_index_entries);
1768 e= &st->index_entries[index];
1769 av_assert1(e->timestamp >= target_ts);
1771 ts_max= e->timestamp;
1772 pos_limit= pos_max - e->min_distance;
1773 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1774 pos_max, pos_limit, av_ts2str(ts_max));
1778 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1783 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1786 ff_read_frame_flush(s);
1787 ff_update_cur_dts(s, st, ts);
1792 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1793 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1796 int64_t limit, ts_max;
1797 int64_t filesize = avio_size(s->pb);
1798 int64_t pos_max = filesize - 1;
1801 pos_max = FFMAX(0, (pos_max) - step);
1802 ts_max = ff_read_timestamp(s, stream_index, &pos_max, limit, read_timestamp);
1804 }while(ts_max == AV_NOPTS_VALUE && 2*limit > step);
1805 if (ts_max == AV_NOPTS_VALUE)
1809 int64_t tmp_pos = pos_max + 1;
1810 int64_t tmp_ts = ff_read_timestamp(s, stream_index, &tmp_pos, INT64_MAX, read_timestamp);
1811 if(tmp_ts == AV_NOPTS_VALUE)
1813 av_assert0(tmp_pos > pos_max);
1816 if(tmp_pos >= filesize)
1828 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1829 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1830 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1831 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1838 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1840 if(ts_min == AV_NOPTS_VALUE){
1841 pos_min = s->data_offset;
1842 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1843 if (ts_min == AV_NOPTS_VALUE)
1847 if(ts_min >= target_ts){
1852 if(ts_max == AV_NOPTS_VALUE){
1853 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
1858 if(ts_max <= target_ts){
1863 if(ts_min > ts_max){
1865 }else if(ts_min == ts_max){
1870 while (pos_min < pos_limit) {
1871 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1872 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1873 assert(pos_limit <= pos_max);
1876 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1877 // interpolate position (better than dichotomy)
1878 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1879 + pos_min - approximate_keyframe_distance;
1880 }else if(no_change==1){
1881 // bisection, if interpolation failed to change min or max pos last time
1882 pos = (pos_min + pos_limit)>>1;
1884 /* linear search if bisection failed, can only happen if there
1885 are very few or no keyframes between min/max */
1890 else if(pos > pos_limit)
1894 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); //may pass pos_limit instead of -1
1899 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1900 pos_min, pos, pos_max,
1901 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1902 pos_limit, start_pos, no_change);
1903 if(ts == AV_NOPTS_VALUE){
1904 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1907 assert(ts != AV_NOPTS_VALUE);
1908 if (target_ts <= ts) {
1909 pos_limit = start_pos - 1;
1913 if (target_ts >= ts) {
1919 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1920 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1923 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1925 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
1926 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1927 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1933 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1934 int64_t pos_min, pos_max;
1936 pos_min = s->data_offset;
1937 pos_max = avio_size(s->pb) - 1;
1939 if (pos < pos_min) pos= pos_min;
1940 else if(pos > pos_max) pos= pos_max;
1942 avio_seek(s->pb, pos, SEEK_SET);
1944 s->io_repositioned = 1;
1949 static int seek_frame_generic(AVFormatContext *s,
1950 int stream_index, int64_t timestamp, int flags)
1957 st = s->streams[stream_index];
1959 index = av_index_search_timestamp(st, timestamp, flags);
1961 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1964 if(index < 0 || index==st->nb_index_entries-1){
1968 if(st->nb_index_entries){
1969 av_assert0(st->index_entries);
1970 ie= &st->index_entries[st->nb_index_entries-1];
1971 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1973 ff_update_cur_dts(s, st, ie->timestamp);
1975 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1981 read_status = av_read_frame(s, &pkt);
1982 } while (read_status == AVERROR(EAGAIN));
1983 if (read_status < 0)
1985 av_free_packet(&pkt);
1986 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1987 if(pkt.flags & AV_PKT_FLAG_KEY)
1989 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1990 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);
1995 index = av_index_search_timestamp(st, timestamp, flags);
2000 ff_read_frame_flush(s);
2001 if (s->iformat->read_seek){
2002 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2005 ie = &st->index_entries[index];
2006 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2008 ff_update_cur_dts(s, st, ie->timestamp);
2013 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2014 int64_t timestamp, int flags)
2019 if (flags & AVSEEK_FLAG_BYTE) {
2020 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2022 ff_read_frame_flush(s);
2023 return seek_frame_byte(s, stream_index, timestamp, flags);
2026 if(stream_index < 0){
2027 stream_index= av_find_default_stream_index(s);
2028 if(stream_index < 0)
2031 st= s->streams[stream_index];
2032 /* timestamp for default must be expressed in AV_TIME_BASE units */
2033 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
2036 /* first, we try the format specific seek */
2037 if (s->iformat->read_seek) {
2038 ff_read_frame_flush(s);
2039 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2046 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2047 ff_read_frame_flush(s);
2048 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2049 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2050 ff_read_frame_flush(s);
2051 return seek_frame_generic(s, stream_index, timestamp, flags);
2057 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
2061 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2062 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2063 if ((flags & AVSEEK_FLAG_BACKWARD))
2067 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2068 flags & ~AVSEEK_FLAG_BACKWARD);
2071 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2074 ret = avformat_queue_attached_pictures(s);
2079 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
2081 if(min_ts > ts || max_ts < ts)
2083 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2084 return AVERROR(EINVAL);
2087 flags |= AVSEEK_FLAG_ANY;
2088 flags &= ~AVSEEK_FLAG_BACKWARD;
2090 if (s->iformat->read_seek2) {
2092 ff_read_frame_flush(s);
2094 if (stream_index == -1 && s->nb_streams == 1) {
2095 AVRational time_base = s->streams[0]->time_base;
2096 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2097 min_ts = av_rescale_rnd(min_ts, time_base.den,
2098 time_base.num * (int64_t)AV_TIME_BASE,
2099 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2100 max_ts = av_rescale_rnd(max_ts, time_base.den,
2101 time_base.num * (int64_t)AV_TIME_BASE,
2102 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2105 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2108 ret = avformat_queue_attached_pictures(s);
2112 if(s->iformat->read_timestamp){
2113 //try to seek via read_timestamp()
2116 // Fall back on old API if new is not implemented but old is.
2117 // Note the old API has somewhat different semantics.
2118 if (s->iformat->read_seek || 1) {
2119 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2120 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2121 if (ret<0 && ts != min_ts && max_ts != ts) {
2122 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2124 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2129 // try some generic seek like seek_frame_generic() but with new ts semantics
2130 return -1; //unreachable
2133 /*******************************************************/
2136 * Return TRUE if the stream has accurate duration in any stream.
2138 * @return TRUE if the stream has accurate duration for at least one component.
2140 static int has_duration(AVFormatContext *ic)
2145 for(i = 0;i < ic->nb_streams; i++) {
2146 st = ic->streams[i];
2147 if (st->duration != AV_NOPTS_VALUE)
2150 if (ic->duration != AV_NOPTS_VALUE)
2156 * Estimate the stream timings from the one of each components.
2158 * Also computes the global bitrate if possible.
2160 static void update_stream_timings(AVFormatContext *ic)
2162 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2163 int64_t duration, duration1, filesize;
2168 start_time = INT64_MAX;
2169 start_time_text = INT64_MAX;
2170 end_time = INT64_MIN;
2171 duration = INT64_MIN;
2172 for(i = 0;i < ic->nb_streams; i++) {
2173 st = ic->streams[i];
2174 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2175 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2176 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2177 if (start_time1 < start_time_text)
2178 start_time_text = start_time1;
2180 start_time = FFMIN(start_time, start_time1);
2181 end_time1 = AV_NOPTS_VALUE;
2182 if (st->duration != AV_NOPTS_VALUE) {
2183 end_time1 = start_time1
2184 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2185 end_time = FFMAX(end_time, end_time1);
2187 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2188 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2189 p->start_time = start_time1;
2190 if(p->end_time < end_time1)
2191 p->end_time = end_time1;
2194 if (st->duration != AV_NOPTS_VALUE) {
2195 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2196 duration = FFMAX(duration, duration1);
2199 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2200 start_time = start_time_text;
2201 else if(start_time > start_time_text)
2202 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2204 if (start_time != INT64_MAX) {
2205 ic->start_time = start_time;
2206 if (end_time != INT64_MIN) {
2207 if (ic->nb_programs) {
2208 for (i=0; i<ic->nb_programs; i++) {
2209 p = ic->programs[i];
2210 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2211 duration = FFMAX(duration, p->end_time - p->start_time);
2214 duration = FFMAX(duration, end_time - start_time);
2217 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2218 ic->duration = duration;
2220 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2221 /* compute the bitrate */
2222 double bitrate = (double)filesize * 8.0 * AV_TIME_BASE /
2223 (double)ic->duration;
2224 if (bitrate >= 0 && bitrate <= INT_MAX)
2225 ic->bit_rate = bitrate;
2229 static void fill_all_stream_timings(AVFormatContext *ic)
2234 update_stream_timings(ic);
2235 for(i = 0;i < ic->nb_streams; i++) {
2236 st = ic->streams[i];
2237 if (st->start_time == AV_NOPTS_VALUE) {
2238 if(ic->start_time != AV_NOPTS_VALUE)
2239 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2240 if(ic->duration != AV_NOPTS_VALUE)
2241 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2246 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2248 int64_t filesize, duration;
2249 int i, show_warning = 0;
2252 /* if bit_rate is already set, we believe it */
2253 if (ic->bit_rate <= 0) {
2255 for(i=0;i<ic->nb_streams;i++) {
2256 st = ic->streams[i];
2257 if (st->codec->bit_rate > 0) {
2258 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2262 bit_rate += st->codec->bit_rate;
2265 ic->bit_rate = bit_rate;
2268 /* if duration is already set, we believe it */
2269 if (ic->duration == AV_NOPTS_VALUE &&
2270 ic->bit_rate != 0) {
2271 filesize = ic->pb ? avio_size(ic->pb) : 0;
2273 for(i = 0; i < ic->nb_streams; i++) {
2274 st = ic->streams[i];
2275 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2276 && st->duration == AV_NOPTS_VALUE) {
2277 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2278 st->duration = duration;
2285 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2288 #define DURATION_MAX_READ_SIZE 250000LL
2289 #define DURATION_MAX_RETRY 4
2291 /* only usable for MPEG-PS streams */
2292 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2294 AVPacket pkt1, *pkt = &pkt1;
2296 int read_size, i, ret;
2298 int64_t filesize, offset, duration;
2301 /* flush packet queue */
2302 flush_packet_queue(ic);
2304 for (i=0; i<ic->nb_streams; i++) {
2305 st = ic->streams[i];
2306 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2307 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2310 av_parser_close(st->parser);
2315 /* estimate the end time (duration) */
2316 /* XXX: may need to support wrapping */
2317 filesize = ic->pb ? avio_size(ic->pb) : 0;
2318 end_time = AV_NOPTS_VALUE;
2320 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2324 avio_seek(ic->pb, offset, SEEK_SET);
2327 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2331 ret = ff_read_packet(ic, pkt);
2332 } while(ret == AVERROR(EAGAIN));
2335 read_size += pkt->size;
2336 st = ic->streams[pkt->stream_index];
2337 if (pkt->pts != AV_NOPTS_VALUE &&
2338 (st->start_time != AV_NOPTS_VALUE ||
2339 st->first_dts != AV_NOPTS_VALUE)) {
2340 duration = end_time = pkt->pts;
2341 if (st->start_time != AV_NOPTS_VALUE)
2342 duration -= st->start_time;
2344 duration -= st->first_dts;
2346 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<=0 ||
2347 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2348 st->duration = duration;
2349 st->info->last_duration = duration;
2352 av_free_packet(pkt);
2354 }while( end_time==AV_NOPTS_VALUE
2355 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2356 && ++retry <= DURATION_MAX_RETRY);
2358 fill_all_stream_timings(ic);
2360 avio_seek(ic->pb, old_offset, SEEK_SET);
2361 for (i=0; i<ic->nb_streams; i++) {
2363 st->cur_dts= st->first_dts;
2364 st->last_IP_pts = AV_NOPTS_VALUE;
2365 st->reference_dts = AV_NOPTS_VALUE;
2369 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2373 /* get the file size, if possible */
2374 if (ic->iformat->flags & AVFMT_NOFILE) {
2377 file_size = avio_size(ic->pb);
2378 file_size = FFMAX(0, file_size);
2381 if ((!strcmp(ic->iformat->name, "mpeg") ||
2382 !strcmp(ic->iformat->name, "mpegts")) &&
2383 file_size && ic->pb->seekable) {
2384 /* get accurate estimate from the PTSes */
2385 estimate_timings_from_pts(ic, old_offset);
2386 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2387 } else if (has_duration(ic)) {
2388 /* at least one component has timings - we use them for all
2390 fill_all_stream_timings(ic);
2391 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2393 /* less precise: use bitrate info */
2394 estimate_timings_from_bit_rate(ic);
2395 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2397 update_stream_timings(ic);
2401 AVStream av_unused *st;
2402 for(i = 0;i < ic->nb_streams; i++) {
2403 st = ic->streams[i];
2404 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2405 (double) st->start_time / AV_TIME_BASE,
2406 (double) st->duration / AV_TIME_BASE);
2408 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2409 (double) ic->start_time / AV_TIME_BASE,
2410 (double) ic->duration / AV_TIME_BASE,
2411 ic->bit_rate / 1000);
2415 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2417 AVCodecContext *avctx = st->codec;
2419 #define FAIL(errmsg) do { \
2421 *errmsg_ptr = errmsg; \
2425 switch (avctx->codec_type) {
2426 case AVMEDIA_TYPE_AUDIO:
2427 if (!avctx->frame_size && determinable_frame_size(avctx))
2428 FAIL("unspecified frame size");
2429 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2430 FAIL("unspecified sample format");
2431 if (!avctx->sample_rate)
2432 FAIL("unspecified sample rate");
2433 if (!avctx->channels)
2434 FAIL("unspecified number of channels");
2435 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2436 FAIL("no decodable DTS frames");
2438 case AVMEDIA_TYPE_VIDEO:
2440 FAIL("unspecified size");
2441 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2442 FAIL("unspecified pixel format");
2443 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2444 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2445 FAIL("no frame in rv30/40 and no sar");
2447 case AVMEDIA_TYPE_SUBTITLE:
2448 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2449 FAIL("unspecified size");
2451 case AVMEDIA_TYPE_DATA:
2452 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2455 if (avctx->codec_id == AV_CODEC_ID_NONE)
2456 FAIL("unknown codec");
2460 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2461 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt, AVDictionary **options)
2463 const AVCodec *codec;
2464 int got_picture = 1, ret = 0;
2465 AVFrame *frame = avcodec_alloc_frame();
2466 AVSubtitle subtitle;
2467 AVPacket pkt = *avpkt;
2470 return AVERROR(ENOMEM);
2472 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2473 AVDictionary *thread_opt = NULL;
2475 codec = find_decoder(s, st, st->codec->codec_id);
2478 st->info->found_decoder = -1;
2483 /* force thread count to 1 since the h264 decoder will not extract SPS
2484 * and PPS to extradata during multi-threaded decoding */
2485 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2486 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2488 av_dict_free(&thread_opt);
2490 st->info->found_decoder = -1;
2493 st->info->found_decoder = 1;
2494 } else if (!st->info->found_decoder)
2495 st->info->found_decoder = 1;
2497 if (st->info->found_decoder < 0) {
2502 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2504 (!has_codec_parameters(st, NULL) ||
2505 !has_decode_delay_been_guessed(st) ||
2506 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2508 avcodec_get_frame_defaults(frame);
2509 switch(st->codec->codec_type) {
2510 case AVMEDIA_TYPE_VIDEO:
2511 ret = avcodec_decode_video2(st->codec, frame,
2512 &got_picture, &pkt);
2514 case AVMEDIA_TYPE_AUDIO:
2515 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2517 case AVMEDIA_TYPE_SUBTITLE:
2518 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2519 &got_picture, &pkt);
2527 st->nb_decoded_frames++;
2534 if(!pkt.data && !got_picture)
2538 avcodec_free_frame(&frame);
2542 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2544 while (tags->id != AV_CODEC_ID_NONE) {
2552 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2555 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2556 if(tag == tags[i].tag)
2559 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2560 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2563 return AV_CODEC_ID_NONE;
2566 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2570 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2571 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2572 default: return AV_CODEC_ID_NONE;
2577 if (sflags & (1 << (bps - 1))) {
2579 case 1: return AV_CODEC_ID_PCM_S8;
2580 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2581 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2582 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2583 default: return AV_CODEC_ID_NONE;
2587 case 1: return AV_CODEC_ID_PCM_U8;
2588 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2589 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2590 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2591 default: return AV_CODEC_ID_NONE;
2597 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2600 if (!av_codec_get_tag2(tags, id, &tag))
2605 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2609 for(i=0; tags && tags[i]; i++){
2610 const AVCodecTag *codec_tags = tags[i];
2611 while (codec_tags->id != AV_CODEC_ID_NONE) {
2612 if (codec_tags->id == id) {
2613 *tag = codec_tags->tag;
2622 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2625 for(i=0; tags && tags[i]; i++){
2626 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2627 if(id!=AV_CODEC_ID_NONE) return id;
2629 return AV_CODEC_ID_NONE;
2632 static void compute_chapters_end(AVFormatContext *s)
2635 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2637 for (i = 0; i < s->nb_chapters; i++)
2638 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2639 AVChapter *ch = s->chapters[i];
2640 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2643 for (j = 0; j < s->nb_chapters; j++) {
2644 AVChapter *ch1 = s->chapters[j];
2645 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2646 if (j != i && next_start > ch->start && next_start < end)
2649 ch->end = (end == INT64_MAX) ? ch->start : end;
2653 static int get_std_framerate(int i){
2654 if(i<60*12) return (i+1)*1001;
2655 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2659 * Is the time base unreliable.
2660 * This is a heuristic to balance between quick acceptance of the values in
2661 * the headers vs. some extra checks.
2662 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2663 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2664 * And there are "variable" fps files this needs to detect as well.
2666 static int tb_unreliable(AVCodecContext *c){
2667 if( c->time_base.den >= 101L*c->time_base.num
2668 || c->time_base.den < 5L*c->time_base.num
2669 /* || c->codec_tag == AV_RL32("DIVX")
2670 || c->codec_tag == AV_RL32("XVID")*/
2671 || c->codec_tag == AV_RL32("mp4v")
2672 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2673 || c->codec_id == AV_CODEC_ID_H264
2679 #if FF_API_FORMAT_PARAMETERS
2680 int av_find_stream_info(AVFormatContext *ic)
2682 return avformat_find_stream_info(ic, NULL);
2686 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2690 if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) {
2691 avctx->extradata_size = 0;
2692 return AVERROR(EINVAL);
2694 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
2695 if (avctx->extradata) {
2696 memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2697 avctx->extradata_size = size;
2700 avctx->extradata_size = 0;
2701 ret = AVERROR(ENOMEM);
2706 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2708 int i, count, ret = 0, j;
2711 AVPacket pkt1, *pkt;
2712 int64_t old_offset = avio_tell(ic->pb);
2713 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2714 int flush_codecs = ic->probesize > 0;
2717 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2719 for(i=0;i<ic->nb_streams;i++) {
2720 const AVCodec *codec;
2721 AVDictionary *thread_opt = NULL;
2722 st = ic->streams[i];
2724 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2725 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2726 /* if(!st->time_base.num)
2728 if(!st->codec->time_base.num)
2729 st->codec->time_base= st->time_base;
2731 //only for the split stuff
2732 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2733 st->parser = av_parser_init(st->codec->codec_id);
2735 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2736 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2737 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2738 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2740 } else if (st->need_parsing) {
2741 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2742 "%s, packets or times may be invalid.\n",
2743 avcodec_get_name(st->codec->codec_id));
2746 codec = find_decoder(ic, st, st->codec->codec_id);
2748 /* force thread count to 1 since the h264 decoder will not extract SPS
2749 * and PPS to extradata during multi-threaded decoding */
2750 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2752 /* Ensure that subtitle_header is properly set. */
2753 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2754 && codec && !st->codec->codec)
2755 avcodec_open2(st->codec, codec, options ? &options[i]
2758 //try to just open decoders, in case this is enough to get parameters
2759 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2760 if (codec && !st->codec->codec)
2761 avcodec_open2(st->codec, codec, options ? &options[i]
2765 av_dict_free(&thread_opt);
2768 for (i=0; i<ic->nb_streams; i++) {
2769 #if FF_API_R_FRAME_RATE
2770 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2772 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2773 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2779 if (ff_check_interrupt(&ic->interrupt_callback)){
2781 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2785 /* check if one codec still needs to be handled */
2786 for(i=0;i<ic->nb_streams;i++) {
2787 int fps_analyze_framecount = 20;
2789 st = ic->streams[i];
2790 if (!has_codec_parameters(st, NULL))
2792 /* if the timebase is coarse (like the usual millisecond precision
2793 of mkv), we need to analyze more frames to reliably arrive at
2795 if (av_q2d(st->time_base) > 0.0005)
2796 fps_analyze_framecount *= 2;
2797 if (ic->fps_probe_size >= 0)
2798 fps_analyze_framecount = ic->fps_probe_size;
2799 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
2800 fps_analyze_framecount = 0;
2801 /* variable fps and no guess at the real fps */
2802 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2803 && st->info->duration_count < fps_analyze_framecount
2804 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2806 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2808 if (st->first_dts == AV_NOPTS_VALUE &&
2809 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2810 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2813 if (i == ic->nb_streams) {
2814 /* NOTE: if the format has no header, then we need to read
2815 some packets to get most of the streams, so we cannot
2817 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2818 /* if we found the info for all the codecs, we can stop */
2820 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2825 /* we did not get all the codec info, but we read too much data */
2826 if (read_size >= ic->probesize) {
2828 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit of %d bytes reached\n", ic->probesize);
2829 for (i = 0; i < ic->nb_streams; i++)
2830 if (!ic->streams[i]->r_frame_rate.num &&
2831 ic->streams[i]->info->duration_count <= 1 &&
2832 strcmp(ic->iformat->name, "image2"))
2833 av_log(ic, AV_LOG_WARNING,
2834 "Stream #%d: not enough frames to estimate rate; "
2835 "consider increasing probesize\n", i);
2839 /* NOTE: a new stream can be added there if no header in file
2840 (AVFMTCTX_NOHEADER) */
2841 ret = read_frame_internal(ic, &pkt1);
2842 if (ret == AVERROR(EAGAIN))
2850 if (ic->flags & AVFMT_FLAG_NOBUFFER)
2851 free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end);
2853 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2854 &ic->packet_buffer_end);
2856 ret = AVERROR(ENOMEM);
2857 goto find_stream_info_err;
2859 if ((ret = av_dup_packet(pkt)) < 0)
2860 goto find_stream_info_err;
2863 read_size += pkt->size;
2865 st = ic->streams[pkt->stream_index];
2866 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2867 /* check for non-increasing dts */
2868 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2869 st->info->fps_last_dts >= pkt->dts) {
2870 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2871 "packet %d with DTS %"PRId64", packet %d with DTS "
2872 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2873 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2874 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2876 /* check for a discontinuity in dts - if the difference in dts
2877 * is more than 1000 times the average packet duration in the sequence,
2878 * we treat it as a discontinuity */
2879 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2880 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2881 (pkt->dts - st->info->fps_last_dts) / 1000 >
2882 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2883 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2884 "packet %d with DTS %"PRId64", packet %d with DTS "
2885 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2886 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2887 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2890 /* update stored dts values */
2891 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2892 st->info->fps_first_dts = pkt->dts;
2893 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2895 st->info->fps_last_dts = pkt->dts;
2896 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2898 if (st->codec_info_nb_frames>1) {
2900 if (st->time_base.den > 0)
2901 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2902 if (st->avg_frame_rate.num > 0)
2903 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2906 && st->codec_info_nb_frames>30
2907 && st->info->fps_first_dts != AV_NOPTS_VALUE
2908 && st->info->fps_last_dts != AV_NOPTS_VALUE)
2909 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
2911 if (t >= ic->max_analyze_duration) {
2912 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %d reached at %"PRId64" microseconds\n", ic->max_analyze_duration, t);
2915 if (pkt->duration) {
2916 st->info->codec_info_duration += pkt->duration;
2917 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2920 #if FF_API_R_FRAME_RATE
2922 int64_t last = st->info->last_dts;
2924 if( pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last
2925 && pkt->dts - (uint64_t)last < INT64_MAX){
2926 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2927 int64_t duration= pkt->dts - last;
2929 if (!st->info->duration_error)
2930 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
2931 if (!st->info->duration_error)
2932 return AVERROR(ENOMEM);
2934 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2935 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2936 for (i=0; i<MAX_STD_TIMEBASES; i++) {
2937 int framerate= get_std_framerate(i);
2938 double sdts= dts*framerate/(1001*12);
2940 int64_t ticks= llrint(sdts+j*0.5);
2941 double error= sdts - ticks + j*0.5;
2942 st->info->duration_error[j][0][i] += error;
2943 st->info->duration_error[j][1][i] += error*error;
2946 st->info->duration_count++;
2947 // ignore the first 4 values, they might have some random jitter
2948 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2949 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2951 if (pkt->dts != AV_NOPTS_VALUE)
2952 st->info->last_dts = pkt->dts;
2955 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2956 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2957 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2958 if (ff_alloc_extradata(st->codec, i))
2959 return AVERROR(ENOMEM);
2960 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2964 /* if still no information, we try to open the codec and to
2965 decompress the frame. We try to avoid that in most cases as
2966 it takes longer and uses more memory. For MPEG-4, we need to
2967 decompress for QuickTime.
2969 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2970 least one frame of codec data, this makes sure the codec initializes
2971 the channel configuration and does not only trust the values from the container.
2973 try_decode_frame(ic, st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2975 st->codec_info_nb_frames++;
2980 AVPacket empty_pkt = { 0 };
2982 av_init_packet(&empty_pkt);
2984 for(i=0;i<ic->nb_streams;i++) {
2986 st = ic->streams[i];
2988 /* flush the decoders */
2989 if (st->info->found_decoder == 1) {
2991 err = try_decode_frame(ic, st, &empty_pkt,
2992 (options && i < orig_nb_streams) ?
2993 &options[i] : NULL);
2994 } while (err > 0 && !has_codec_parameters(st, NULL));
2997 av_log(ic, AV_LOG_INFO,
2998 "decoding for stream %d failed\n", st->index);
3004 // close codecs which were opened in try_decode_frame()
3005 for(i=0;i<ic->nb_streams;i++) {
3006 st = ic->streams[i];
3007 avcodec_close(st->codec);
3009 for(i=0;i<ic->nb_streams;i++) {
3010 st = ic->streams[i];
3011 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3012 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
3013 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3014 if (avpriv_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
3015 st->codec->codec_tag= tag;
3018 /* estimate average framerate if not set by demuxer */
3019 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
3021 double best_error = 0.01;
3023 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3024 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3025 st->info->codec_info_duration < 0)
3027 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3028 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
3029 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
3031 /* round guessed framerate to a "standard" framerate if it's
3032 * within 1% of the original estimate*/
3033 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
3034 AVRational std_fps = { get_std_framerate(j), 12*1001 };
3035 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
3037 if (error < best_error) {
3039 best_fps = std_fps.num;
3043 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3044 best_fps, 12*1001, INT_MAX);
3047 // the check for tb_unreliable() is not completely correct, since this is not about handling
3048 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
3049 // ipmovie.c produces.
3050 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)
3051 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);
3052 if (st->info->duration_count>1 && !st->r_frame_rate.num
3053 && tb_unreliable(st->codec)) {
3055 double best_error= 0.01;
3057 for (j=0; j<MAX_STD_TIMEBASES; j++) {
3060 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
3062 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
3065 int n= st->info->duration_count;
3066 double a= st->info->duration_error[k][0][j] / n;
3067 double error= st->info->duration_error[k][1][j]/n - a*a;
3069 if(error < best_error && best_error> 0.000000001){
3071 num = get_std_framerate(j);
3074 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3077 // do not increase frame rate by more than 1 % in order to match a standard rate.
3078 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
3079 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3082 if (!st->r_frame_rate.num){
3083 if( st->codec->time_base.den * (int64_t)st->time_base.num
3084 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
3085 st->r_frame_rate.num = st->codec->time_base.den;
3086 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3088 st->r_frame_rate.num = st->time_base.den;
3089 st->r_frame_rate.den = st->time_base.num;
3092 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3093 if(!st->codec->bits_per_coded_sample)
3094 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
3095 // set stream disposition based on audio service type
3096 switch (st->codec->audio_service_type) {
3097 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3098 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
3099 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3100 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
3101 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3102 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
3103 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3104 st->disposition = AV_DISPOSITION_COMMENT; break;
3105 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3106 st->disposition = AV_DISPOSITION_KARAOKE; break;
3112 estimate_timings(ic, old_offset);
3114 if (ret >= 0 && ic->nb_streams)
3115 ret = -1; /* we could not have all the codec parameters before EOF */
3116 for(i=0;i<ic->nb_streams;i++) {
3118 st = ic->streams[i];
3119 if (!has_codec_parameters(st, &errmsg)) {
3121 avcodec_string(buf, sizeof(buf), st->codec, 0);
3122 av_log(ic, AV_LOG_WARNING,
3123 "Could not find codec parameters for stream %d (%s): %s\n"
3124 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3131 compute_chapters_end(ic);
3133 find_stream_info_err:
3134 for (i=0; i < ic->nb_streams; i++) {
3135 st = ic->streams[i];
3136 if (ic->streams[i]->codec && ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3137 ic->streams[i]->codec->thread_count = 0;
3139 av_freep(&st->info->duration_error);
3140 av_freep(&ic->streams[i]->info);
3143 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
3147 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3151 for (i = 0; i < ic->nb_programs; i++) {
3152 if (ic->programs[i] == last) {
3156 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3157 if (ic->programs[i]->stream_index[j] == s)
3158 return ic->programs[i];
3164 int av_find_best_stream(AVFormatContext *ic,
3165 enum AVMediaType type,
3166 int wanted_stream_nb,
3168 AVCodec **decoder_ret,
3171 int i, nb_streams = ic->nb_streams;
3172 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3173 unsigned *program = NULL;
3174 AVCodec *decoder = NULL, *best_decoder = NULL;
3176 if (related_stream >= 0 && wanted_stream_nb < 0) {
3177 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3179 program = p->stream_index;
3180 nb_streams = p->nb_stream_indexes;
3183 for (i = 0; i < nb_streams; i++) {
3184 int real_stream_index = program ? program[i] : i;
3185 AVStream *st = ic->streams[real_stream_index];
3186 AVCodecContext *avctx = st->codec;
3187 if (avctx->codec_type != type)
3189 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3191 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3194 decoder = find_decoder(ic, st, st->codec->codec_id);
3197 ret = AVERROR_DECODER_NOT_FOUND;
3201 count = st->codec_info_nb_frames;
3202 bitrate = avctx->bit_rate;
3203 multiframe = FFMIN(5, count);
3204 if ((best_multiframe > multiframe) ||
3205 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3206 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3209 best_bitrate = bitrate;
3210 best_multiframe = multiframe;
3211 ret = real_stream_index;
3212 best_decoder = decoder;
3213 if (program && i == nb_streams - 1 && ret < 0) {
3215 nb_streams = ic->nb_streams;
3216 i = 0; /* no related stream found, try again with everything */
3220 *decoder_ret = best_decoder;
3224 /*******************************************************/
3226 int av_read_play(AVFormatContext *s)
3228 if (s->iformat->read_play)
3229 return s->iformat->read_play(s);
3231 return avio_pause(s->pb, 0);
3232 return AVERROR(ENOSYS);
3235 int av_read_pause(AVFormatContext *s)
3237 if (s->iformat->read_pause)
3238 return s->iformat->read_pause(s);
3240 return avio_pause(s->pb, 1);
3241 return AVERROR(ENOSYS);
3244 void ff_free_stream(AVFormatContext *s, AVStream *st){
3245 av_assert0(s->nb_streams>0);
3246 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3249 av_parser_close(st->parser);
3251 if (st->attached_pic.data)
3252 av_free_packet(&st->attached_pic);
3253 av_dict_free(&st->metadata);
3254 av_freep(&st->probe_data.buf);
3255 av_freep(&st->index_entries);
3256 av_freep(&st->codec->extradata);
3257 av_freep(&st->codec->subtitle_header);
3258 av_freep(&st->codec);
3259 av_freep(&st->priv_data);
3261 av_freep(&st->info->duration_error);
3262 av_freep(&st->info);
3263 av_freep(&s->streams[ --s->nb_streams ]);
3266 void avformat_free_context(AVFormatContext *s)
3274 if (s->iformat && s->iformat->priv_class && s->priv_data)
3275 av_opt_free(s->priv_data);
3277 for(i=s->nb_streams-1; i>=0; i--) {
3278 ff_free_stream(s, s->streams[i]);
3280 for(i=s->nb_programs-1; i>=0; i--) {
3281 av_dict_free(&s->programs[i]->metadata);
3282 av_freep(&s->programs[i]->stream_index);
3283 av_freep(&s->programs[i]);
3285 av_freep(&s->programs);
3286 av_freep(&s->priv_data);
3287 while(s->nb_chapters--) {
3288 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3289 av_freep(&s->chapters[s->nb_chapters]);
3291 av_freep(&s->chapters);
3292 av_dict_free(&s->metadata);
3293 av_freep(&s->streams);
3297 #if FF_API_CLOSE_INPUT_FILE
3298 void av_close_input_file(AVFormatContext *s)
3300 avformat_close_input(&s);
3304 void avformat_close_input(AVFormatContext **ps)
3315 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3316 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3319 flush_packet_queue(s);
3322 if (s->iformat->read_close)
3323 s->iformat->read_close(s);
3326 avformat_free_context(s);
3333 #if FF_API_NEW_STREAM
3334 AVStream *av_new_stream(AVFormatContext *s, int id)
3336 AVStream *st = avformat_new_stream(s, NULL);
3343 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3349 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3351 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3354 s->streams = streams;
3356 st = av_mallocz(sizeof(AVStream));
3359 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3363 st->info->last_dts = AV_NOPTS_VALUE;
3365 st->codec = avcodec_alloc_context3(c);
3367 /* no default bitrate if decoding */
3368 st->codec->bit_rate = 0;
3370 st->index = s->nb_streams;
3371 st->start_time = AV_NOPTS_VALUE;
3372 st->duration = AV_NOPTS_VALUE;
3373 /* we set the current DTS to 0 so that formats without any timestamps
3374 but durations get some timestamps, formats with some unknown
3375 timestamps have their first few packets buffered and the
3376 timestamps corrected before they are returned to the user */
3377 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3378 st->first_dts = AV_NOPTS_VALUE;
3379 st->probe_packets = MAX_PROBE_PACKETS;
3380 st->pts_wrap_reference = AV_NOPTS_VALUE;
3381 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3383 /* default pts setting is MPEG-like */
3384 avpriv_set_pts_info(st, 33, 1, 90000);
3385 st->last_IP_pts = AV_NOPTS_VALUE;
3386 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3387 st->pts_buffer[i]= AV_NOPTS_VALUE;
3388 st->reference_dts = AV_NOPTS_VALUE;
3390 st->sample_aspect_ratio = (AVRational){0,1};
3392 #if FF_API_R_FRAME_RATE
3393 st->info->last_dts = AV_NOPTS_VALUE;
3395 st->info->fps_first_dts = AV_NOPTS_VALUE;
3396 st->info->fps_last_dts = AV_NOPTS_VALUE;
3398 s->streams[s->nb_streams++] = st;
3402 AVProgram *av_new_program(AVFormatContext *ac, int id)
3404 AVProgram *program=NULL;
3407 av_dlog(ac, "new_program: id=0x%04x\n", id);
3409 for(i=0; i<ac->nb_programs; i++)
3410 if(ac->programs[i]->id == id)
3411 program = ac->programs[i];
3414 program = av_mallocz(sizeof(AVProgram));
3417 dynarray_add(&ac->programs, &ac->nb_programs, program);
3418 program->discard = AVDISCARD_NONE;
3421 program->pts_wrap_reference = AV_NOPTS_VALUE;
3422 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3424 program->start_time =
3425 program->end_time = AV_NOPTS_VALUE;
3430 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3432 AVChapter *chapter = NULL;
3435 for(i=0; i<s->nb_chapters; i++)
3436 if(s->chapters[i]->id == id)
3437 chapter = s->chapters[i];
3440 chapter= av_mallocz(sizeof(AVChapter));
3443 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3445 av_dict_set(&chapter->metadata, "title", title, 0);
3447 chapter->time_base= time_base;
3448 chapter->start = start;
3454 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3457 AVProgram *program=NULL;
3460 if (idx >= ac->nb_streams) {
3461 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3465 for(i=0; i<ac->nb_programs; i++){
3466 if(ac->programs[i]->id != progid)
3468 program = ac->programs[i];
3469 for(j=0; j<program->nb_stream_indexes; j++)
3470 if(program->stream_index[j] == idx)
3473 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3476 program->stream_index = tmp;
3477 program->stream_index[program->nb_stream_indexes++] = idx;
3482 static void print_fps(double d, const char *postfix){
3483 uint64_t v= lrintf(d*100);
3484 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3485 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3486 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3489 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3491 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3492 AVDictionaryEntry *tag=NULL;
3494 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3495 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3496 if(strcmp("language", tag->key)){
3497 const char *p = tag->value;
3498 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3501 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3502 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3503 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3505 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3506 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3509 av_log(ctx, AV_LOG_INFO, "\n");
3515 /* "user interface" functions */
3516 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3519 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3520 AVStream *st = ic->streams[i];
3521 int g = av_gcd(st->time_base.num, st->time_base.den);
3522 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3523 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3524 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3525 /* the pid is an important information, so we display it */
3526 /* XXX: add a generic system */
3527 if (flags & AVFMT_SHOW_IDS)
3528 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3530 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3531 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3532 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3533 if (st->sample_aspect_ratio.num && // default
3534 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3535 AVRational display_aspect_ratio;
3536 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3537 st->codec->width*st->sample_aspect_ratio.num,
3538 st->codec->height*st->sample_aspect_ratio.den,
3540 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3541 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3542 display_aspect_ratio.num, display_aspect_ratio.den);
3544 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3545 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3546 print_fps(av_q2d(st->avg_frame_rate), "fps");
3547 #if FF_API_R_FRAME_RATE
3548 if(st->r_frame_rate.den && st->r_frame_rate.num)
3549 print_fps(av_q2d(st->r_frame_rate), "tbr");
3551 if(st->time_base.den && st->time_base.num)
3552 print_fps(1/av_q2d(st->time_base), "tbn");
3553 if(st->codec->time_base.den && st->codec->time_base.num)
3554 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3556 if (st->disposition & AV_DISPOSITION_DEFAULT)
3557 av_log(NULL, AV_LOG_INFO, " (default)");
3558 if (st->disposition & AV_DISPOSITION_DUB)
3559 av_log(NULL, AV_LOG_INFO, " (dub)");
3560 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3561 av_log(NULL, AV_LOG_INFO, " (original)");
3562 if (st->disposition & AV_DISPOSITION_COMMENT)
3563 av_log(NULL, AV_LOG_INFO, " (comment)");
3564 if (st->disposition & AV_DISPOSITION_LYRICS)
3565 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3566 if (st->disposition & AV_DISPOSITION_KARAOKE)
3567 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3568 if (st->disposition & AV_DISPOSITION_FORCED)
3569 av_log(NULL, AV_LOG_INFO, " (forced)");
3570 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3571 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3572 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3573 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3574 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3575 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3576 av_log(NULL, AV_LOG_INFO, "\n");
3577 dump_metadata(NULL, st->metadata, " ");
3580 void av_dump_format(AVFormatContext *ic,
3586 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3587 if (ic->nb_streams && !printed)
3590 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3591 is_output ? "Output" : "Input",
3593 is_output ? ic->oformat->name : ic->iformat->name,
3594 is_output ? "to" : "from", url);
3595 dump_metadata(NULL, ic->metadata, " ");
3597 av_log(NULL, AV_LOG_INFO, " Duration: ");
3598 if (ic->duration != AV_NOPTS_VALUE) {
3599 int hours, mins, secs, us;
3600 int64_t duration = ic->duration + 5000;
3601 secs = duration / AV_TIME_BASE;
3602 us = duration % AV_TIME_BASE;
3607 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3608 (100 * us) / AV_TIME_BASE);
3610 av_log(NULL, AV_LOG_INFO, "N/A");
3612 if (ic->start_time != AV_NOPTS_VALUE) {
3614 av_log(NULL, AV_LOG_INFO, ", start: ");
3615 secs = ic->start_time / AV_TIME_BASE;
3616 us = abs(ic->start_time % AV_TIME_BASE);
3617 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3618 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3620 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3622 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3624 av_log(NULL, AV_LOG_INFO, "N/A");
3626 av_log(NULL, AV_LOG_INFO, "\n");
3628 for (i = 0; i < ic->nb_chapters; i++) {
3629 AVChapter *ch = ic->chapters[i];
3630 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3631 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3632 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3634 dump_metadata(NULL, ch->metadata, " ");
3636 if(ic->nb_programs) {
3637 int j, k, total = 0;
3638 for(j=0; j<ic->nb_programs; j++) {
3639 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3641 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3642 name ? name->value : "");
3643 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3644 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3645 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3646 printed[ic->programs[j]->stream_index[k]] = 1;
3648 total += ic->programs[j]->nb_stream_indexes;
3650 if (total < ic->nb_streams)
3651 av_log(NULL, AV_LOG_INFO, " No Program\n");
3653 for(i=0;i<ic->nb_streams;i++)
3655 dump_stream_format(ic, i, index, is_output);
3660 uint64_t ff_ntp_time(void)
3662 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3665 int av_get_frame_filename(char *buf, int buf_size,
3666 const char *path, int number)
3669 char *q, buf1[20], c;
3670 int nd, len, percentd_found;
3682 while (av_isdigit(*p)) {
3683 nd = nd * 10 + *p++ - '0';
3686 } while (av_isdigit(c));
3695 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3697 if ((q - buf + len) > buf_size - 1)
3699 memcpy(q, buf1, len);
3707 if ((q - buf) < buf_size - 1)
3711 if (!percentd_found)
3720 static void hex_dump_internal(void *avcl, FILE *f, int level,
3721 const uint8_t *buf, int size)
3724 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3726 for(i=0;i<size;i+=16) {
3733 PRINT(" %02x", buf[i+j]);
3738 for(j=0;j<len;j++) {
3740 if (c < ' ' || c > '~')
3749 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3751 hex_dump_internal(NULL, f, 0, buf, size);
3754 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3756 hex_dump_internal(avcl, NULL, level, buf, size);
3759 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3761 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3762 PRINT("stream #%d:\n", pkt->stream_index);
3763 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3764 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3765 /* DTS is _always_ valid after av_read_frame() */
3767 if (pkt->dts == AV_NOPTS_VALUE)
3770 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3771 /* PTS may not be known if B-frames are present. */
3773 if (pkt->pts == AV_NOPTS_VALUE)
3776 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3778 PRINT(" size=%d\n", pkt->size);
3781 av_hex_dump(f, pkt->data, pkt->size);
3784 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3786 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3789 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3792 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3795 void av_url_split(char *proto, int proto_size,
3796 char *authorization, int authorization_size,
3797 char *hostname, int hostname_size,
3799 char *path, int path_size,
3802 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3804 if (port_ptr) *port_ptr = -1;
3805 if (proto_size > 0) proto[0] = 0;
3806 if (authorization_size > 0) authorization[0] = 0;
3807 if (hostname_size > 0) hostname[0] = 0;
3808 if (path_size > 0) path[0] = 0;
3810 /* parse protocol */
3811 if ((p = strchr(url, ':'))) {
3812 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3817 /* no protocol means plain filename */
3818 av_strlcpy(path, url, path_size);
3822 /* separate path from hostname */
3823 ls = strchr(p, '/');
3824 ls2 = strchr(p, '?');
3828 ls = FFMIN(ls, ls2);
3830 av_strlcpy(path, ls, path_size);
3832 ls = &p[strlen(p)]; // XXX
3834 /* the rest is hostname, use that to parse auth/port */
3836 /* authorization (user[:pass]@hostname) */
3838 while ((at = strchr(p, '@')) && at < ls) {
3839 av_strlcpy(authorization, at2,
3840 FFMIN(authorization_size, at + 1 - at2));
3841 p = at + 1; /* skip '@' */
3844 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3846 av_strlcpy(hostname, p + 1,
3847 FFMIN(hostname_size, brk - p));
3848 if (brk[1] == ':' && port_ptr)
3849 *port_ptr = atoi(brk + 2);
3850 } else if ((col = strchr(p, ':')) && col < ls) {
3851 av_strlcpy(hostname, p,
3852 FFMIN(col + 1 - p, hostname_size));
3853 if (port_ptr) *port_ptr = atoi(col + 1);
3855 av_strlcpy(hostname, p,
3856 FFMIN(ls + 1 - p, hostname_size));
3860 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3863 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3866 'C', 'D', 'E', 'F' };
3867 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3870 'c', 'd', 'e', 'f' };
3871 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3873 for(i = 0; i < s; i++) {
3874 buff[i * 2] = hex_table[src[i] >> 4];
3875 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3881 int ff_hex_to_data(uint8_t *data, const char *p)
3888 p += strspn(p, SPACE_CHARS);
3891 c = av_toupper((unsigned char) *p++);
3892 if (c >= '0' && c <= '9')
3894 else if (c >= 'A' && c <= 'F')
3909 #if FF_API_SET_PTS_INFO
3910 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3911 unsigned int pts_num, unsigned int pts_den)
3913 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3917 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3918 unsigned int pts_num, unsigned int pts_den)
3921 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3922 if(new_tb.num != pts_num)
3923 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3925 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3927 if(new_tb.num <= 0 || new_tb.den <= 0) {
3928 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);
3931 s->time_base = new_tb;
3932 av_codec_set_pkt_timebase(s->codec, new_tb);
3933 s->pts_wrap_bits = pts_wrap_bits;
3936 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3939 const char *ptr = str;
3941 /* Parse key=value pairs. */
3944 char *dest = NULL, *dest_end;
3945 int key_len, dest_len = 0;
3947 /* Skip whitespace and potential commas. */
3948 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
3955 if (!(ptr = strchr(key, '=')))
3958 key_len = ptr - key;
3960 callback_get_buf(context, key, key_len, &dest, &dest_len);
3961 dest_end = dest + dest_len - 1;
3965 while (*ptr && *ptr != '\"') {
3969 if (dest && dest < dest_end)
3973 if (dest && dest < dest_end)
3981 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
3982 if (dest && dest < dest_end)
3990 int ff_find_stream_index(AVFormatContext *s, int id)
3993 for (i = 0; i < s->nb_streams; i++) {
3994 if (s->streams[i]->id == id)
4000 int64_t ff_iso8601_to_unix_time(const char *datestr)
4002 struct tm time1 = {0}, time2 = {0};
4004 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
4005 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
4007 return av_timegm(&time2);
4009 return av_timegm(&time1);
4012 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
4015 if (ofmt->query_codec)
4016 return ofmt->query_codec(codec_id, std_compliance);
4017 else if (ofmt->codec_tag)
4018 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4019 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4020 codec_id == ofmt->subtitle_codec)
4023 return AVERROR_PATCHWELCOME;
4026 int avformat_network_init(void)
4030 ff_network_inited_globally = 1;
4031 if ((ret = ff_network_init()) < 0)
4038 int avformat_network_deinit(void)
4047 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4048 uint64_t channel_layout, int32_t sample_rate,
4049 int32_t width, int32_t height)
4055 return AVERROR(EINVAL);
4058 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4060 if (channel_layout) {
4062 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4066 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4068 if (width || height) {
4070 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4072 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4074 return AVERROR(ENOMEM);
4075 bytestream_put_le32(&data, flags);
4077 bytestream_put_le32(&data, channels);
4079 bytestream_put_le64(&data, channel_layout);
4081 bytestream_put_le32(&data, sample_rate);
4082 if (width || height) {
4083 bytestream_put_le32(&data, width);
4084 bytestream_put_le32(&data, height);
4089 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4091 AVRational undef = {0, 1};
4092 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4093 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4094 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4096 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4097 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4098 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4099 stream_sample_aspect_ratio = undef;
4101 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4102 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4103 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4104 frame_sample_aspect_ratio = undef;
4106 if (stream_sample_aspect_ratio.num)
4107 return stream_sample_aspect_ratio;
4109 return frame_sample_aspect_ratio;
4112 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4114 AVRational fr = st->r_frame_rate;
4116 if (st->codec->ticks_per_frame > 1) {
4117 AVRational codec_fr = av_inv_q(st->codec->time_base);
4118 AVRational avg_fr = st->avg_frame_rate;
4119 codec_fr.den *= st->codec->ticks_per_frame;
4120 if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7
4121 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1)
4128 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4131 if (*spec <= '9' && *spec >= '0') /* opt:index */
4132 return strtol(spec, NULL, 0) == st->index;
4133 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4134 *spec == 't') { /* opt:[vasdt] */
4135 enum AVMediaType type;
4138 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4139 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4140 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4141 case 'd': type = AVMEDIA_TYPE_DATA; break;
4142 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4143 default: av_assert0(0);
4145 if (type != st->codec->codec_type)
4147 if (*spec++ == ':') { /* possibly followed by :index */
4148 int i, index = strtol(spec, NULL, 0);
4149 for (i = 0; i < s->nb_streams; i++)
4150 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4151 return i == st->index;
4155 } else if (*spec == 'p' && *(spec + 1) == ':') {
4159 prog_id = strtol(spec, &endptr, 0);
4160 for (i = 0; i < s->nb_programs; i++) {
4161 if (s->programs[i]->id != prog_id)
4164 if (*endptr++ == ':') {
4165 int stream_idx = strtol(endptr, NULL, 0);
4166 return stream_idx >= 0 &&
4167 stream_idx < s->programs[i]->nb_stream_indexes &&
4168 st->index == s->programs[i]->stream_index[stream_idx];
4171 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4172 if (st->index == s->programs[i]->stream_index[j])
4176 } else if (*spec == '#') {
4179 sid = strtol(spec + 1, &endptr, 0);
4181 return st->id == sid;
4182 } else if (!*spec) /* empty specifier, matches everything */
4185 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4186 return AVERROR(EINVAL);
4189 void ff_generate_avci_extradata(AVStream *st)
4191 static const uint8_t avci100_1080p_extradata[] = {
4193 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4194 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4195 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4196 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4197 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4198 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4199 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4200 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4201 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4203 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4206 static const uint8_t avci100_1080i_extradata[] = {
4208 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4209 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,