2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
298 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
301 lpd.buf = zerobuffer;
303 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
304 int id3len = ff_id3v2_tag_len(lpd.buf);
305 if (lpd.buf_size > id3len + 16) {
307 lpd.buf_size -= id3len;
313 while ((fmt1 = av_iformat_next(fmt1))) {
314 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
317 if (fmt1->read_probe) {
318 score = fmt1->read_probe(&lpd);
319 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
320 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
321 } else if (fmt1->extensions) {
322 if (av_match_ext(lpd.filename, fmt1->extensions)) {
326 if (score > score_max) {
329 }else if (score == score_max)
332 *score_ret= score_max;
337 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
341 if(score_ret > *score_max){
342 *score_max= score_ret;
348 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
350 return av_probe_input_format2(pd, is_opened, &score);
353 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
355 static const struct {
356 const char *name; enum AVCodecID id; enum AVMediaType type;
358 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
359 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
360 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
361 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
362 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
363 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
364 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
365 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
366 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
372 if (fmt && st->request_probe <= score) {
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
390 int av_demuxer_open(AVFormatContext *ic){
393 if (ic->iformat->read_header) {
394 err = ic->iformat->read_header(ic);
399 if (ic->pb && !ic->data_offset)
400 ic->data_offset = avio_tell(ic->pb);
406 /** size of probe buffer, for guessing file type from file contents */
407 #define PROBE_BUF_MIN 2048
408 #define PROBE_BUF_MAX (1<<20)
410 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
411 const char *filename, void *logctx,
412 unsigned int offset, unsigned int max_probe_size)
414 AVProbeData pd = { filename ? filename : "", NULL, -offset };
415 unsigned char *buf = NULL;
417 int ret = 0, probe_size, buf_offset = 0;
419 if (!max_probe_size) {
420 max_probe_size = PROBE_BUF_MAX;
421 } else if (max_probe_size > PROBE_BUF_MAX) {
422 max_probe_size = PROBE_BUF_MAX;
423 } else if (max_probe_size < PROBE_BUF_MIN) {
424 return AVERROR(EINVAL);
427 if (offset >= max_probe_size) {
428 return AVERROR(EINVAL);
431 if (!*fmt && pb && pb->av_class && av_opt_get(pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type) >= 0 && mime_type) {
432 if (!av_strcasecmp(mime_type, "audio/aacp")) {
433 *fmt = av_find_input_format("aac");
437 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
438 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
439 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
442 if (probe_size < offset) {
446 /* read probe data */
447 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
450 return AVERROR(ENOMEM);
453 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
454 /* fail if error was not end of file, otherwise, lower score */
455 if (ret != AVERROR_EOF) {
460 ret = 0; /* error was end of file, nothing read */
462 pd.buf_size = buf_offset += ret;
463 pd.buf = &buf[offset];
465 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
467 /* guess file format */
468 *fmt = av_probe_input_format2(&pd, 1, &score);
470 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
471 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
473 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
479 return AVERROR_INVALIDDATA;
482 /* rewind. reuse probe buffer to avoid seeking */
483 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
488 /* open input file and probe the format if necessary */
489 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
492 AVProbeData pd = {filename, NULL, 0};
493 int score = AVPROBE_SCORE_RETRY;
496 s->flags |= AVFMT_FLAG_CUSTOM_IO;
498 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
499 else if (s->iformat->flags & AVFMT_NOFILE)
500 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
501 "will be ignored with AVFMT_NOFILE format.\n");
505 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
506 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
509 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
510 &s->interrupt_callback, options)) < 0)
514 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
517 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
518 AVPacketList **plast_pktl){
519 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
524 (*plast_pktl)->next = pktl;
526 *packet_buffer = pktl;
528 /* add the packet in the buffered packet list */
534 void avformat_queue_attached_pictures(AVFormatContext *s)
537 for (i = 0; i < s->nb_streams; i++)
538 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
539 s->streams[i]->discard < AVDISCARD_ALL) {
540 AVPacket copy = s->streams[i]->attached_pic;
541 copy.destruct = NULL;
542 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
546 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
548 AVFormatContext *s = *ps;
550 AVDictionary *tmp = NULL;
551 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
553 if (!s && !(s = avformat_alloc_context()))
554 return AVERROR(ENOMEM);
556 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
557 return AVERROR(EINVAL);
563 av_dict_copy(&tmp, *options, 0);
565 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
568 if ((ret = init_input(s, filename, &tmp)) < 0)
570 avio_skip(s->pb, s->skip_initial_bytes);
572 /* check filename in case an image number is expected */
573 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
574 if (!av_filename_number_test(filename)) {
575 ret = AVERROR(EINVAL);
580 s->duration = s->start_time = AV_NOPTS_VALUE;
581 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
583 /* allocate private data */
584 if (s->iformat->priv_data_size > 0) {
585 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
586 ret = AVERROR(ENOMEM);
589 if (s->iformat->priv_class) {
590 *(const AVClass**)s->priv_data = s->iformat->priv_class;
591 av_opt_set_defaults(s->priv_data);
592 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
597 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
599 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
601 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
602 if ((ret = s->iformat->read_header(s)) < 0)
605 if (id3v2_extra_meta) {
606 if (!strcmp(s->iformat->name, "mp3")) {
607 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
610 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
612 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
614 avformat_queue_attached_pictures(s);
616 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
617 s->data_offset = avio_tell(s->pb);
619 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
622 av_dict_free(options);
629 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
631 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
633 avformat_free_context(s);
638 /*******************************************************/
640 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
642 if(st->request_probe>0){
643 AVProbeData *pd = &st->probe_data;
645 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
649 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
653 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
654 pd->buf_size += pkt->size;
655 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
658 st->probe_packets = 0;
660 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
665 end= s->raw_packet_buffer_remaining_size <= 0
666 || st->probe_packets<=0;
668 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
669 int score= set_codec_from_probe_data(s, st, pd);
670 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
674 st->request_probe= -1;
675 if(st->codec->codec_id != AV_CODEC_ID_NONE){
676 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
678 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
684 static void force_codec_ids(AVFormatContext *s, AVStream *st)
686 switch(st->codec->codec_type){
687 case AVMEDIA_TYPE_VIDEO:
688 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
690 case AVMEDIA_TYPE_AUDIO:
691 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
693 case AVMEDIA_TYPE_SUBTITLE:
694 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
699 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
705 AVPacketList *pktl = s->raw_packet_buffer;
709 st = s->streams[pkt->stream_index];
710 if(st->request_probe <= 0){
711 s->raw_packet_buffer = pktl->next;
712 s->raw_packet_buffer_remaining_size += pkt->size;
721 ret= s->iformat->read_packet(s, pkt);
723 if (!pktl || ret == AVERROR(EAGAIN))
725 for (i = 0; i < s->nb_streams; i++) {
727 if (st->probe_packets) {
728 probe_codec(s, st, NULL);
730 av_assert0(st->request_probe <= 0);
735 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
736 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
737 av_log(s, AV_LOG_WARNING,
738 "Dropped corrupted packet (stream = %d)\n",
744 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
745 av_packet_merge_side_data(pkt);
747 if(pkt->stream_index >= (unsigned)s->nb_streams){
748 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
752 st= s->streams[pkt->stream_index];
754 force_codec_ids(s, st);
756 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
757 if (s->use_wallclock_as_timestamps)
758 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
760 if(!pktl && st->request_probe <= 0)
763 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
764 s->raw_packet_buffer_remaining_size -= pkt->size;
766 probe_codec(s, st, pkt);
770 #if FF_API_READ_PACKET
771 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
773 return ff_read_packet(s, pkt);
778 /**********************************************************/
780 static int determinable_frame_size(AVCodecContext *avctx)
782 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
783 avctx->codec_id == AV_CODEC_ID_MP1 ||
784 avctx->codec_id == AV_CODEC_ID_MP2 ||
785 avctx->codec_id == AV_CODEC_ID_MP3/* ||
786 avctx->codec_id == AV_CODEC_ID_CELT*/)
792 * Get the number of samples of an audio frame. Return -1 on error.
794 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
798 /* give frame_size priority if demuxing */
799 if (!mux && enc->frame_size > 1)
800 return enc->frame_size;
802 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
805 /* fallback to using frame_size if muxing */
806 if (enc->frame_size > 1)
807 return enc->frame_size;
814 * Return the frame duration in seconds. Return 0 if not available.
816 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
817 AVCodecParserContext *pc, AVPacket *pkt)
823 switch(st->codec->codec_type) {
824 case AVMEDIA_TYPE_VIDEO:
825 if (st->r_frame_rate.num && !pc) {
826 *pnum = st->r_frame_rate.den;
827 *pden = st->r_frame_rate.num;
828 } else if(st->time_base.num*1000LL > st->time_base.den) {
829 *pnum = st->time_base.num;
830 *pden = st->time_base.den;
831 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
832 *pnum = st->codec->time_base.num;
833 *pden = st->codec->time_base.den;
834 if (pc && pc->repeat_pict) {
835 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
836 *pden /= 1 + pc->repeat_pict;
838 *pnum *= 1 + pc->repeat_pict;
840 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
841 //Thus if we have no parser in such case leave duration undefined.
842 if(st->codec->ticks_per_frame>1 && !pc){
847 case AVMEDIA_TYPE_AUDIO:
848 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
849 if (frame_size <= 0 || st->codec->sample_rate <= 0)
852 *pden = st->codec->sample_rate;
859 static int is_intra_only(AVCodecContext *enc){
860 const AVCodecDescriptor *desc;
862 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
865 desc = av_codec_get_codec_descriptor(enc);
867 desc = avcodec_descriptor_get(enc->codec_id);
868 av_codec_set_codec_descriptor(enc, desc);
871 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
875 static int has_decode_delay_been_guessed(AVStream *st)
877 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
878 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
880 #if CONFIG_H264_DECODER
881 if(st->codec->has_b_frames &&
882 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
885 if(st->codec->has_b_frames<3)
886 return st->nb_decoded_frames >= 7;
887 else if(st->codec->has_b_frames<4)
888 return st->nb_decoded_frames >= 18;
890 return st->nb_decoded_frames >= 20;
893 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
897 if (pktl == s->parse_queue_end)
898 return s->packet_buffer;
902 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
903 int64_t dts, int64_t pts)
905 AVStream *st= s->streams[stream_index];
906 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
907 int64_t pts_buffer[MAX_REORDER_DELAY+1];
911 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
914 delay = st->codec->has_b_frames;
915 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
917 shift = st->first_dts - RELATIVE_TS_BASE;
919 for (i=0; i<MAX_REORDER_DELAY+1; i++)
920 pts_buffer[i] = AV_NOPTS_VALUE;
922 if (is_relative(pts))
925 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
926 if(pktl->pkt.stream_index != stream_index)
928 if(is_relative(pktl->pkt.pts))
929 pktl->pkt.pts += shift;
931 if(is_relative(pktl->pkt.dts))
932 pktl->pkt.dts += shift;
934 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
935 st->start_time= pktl->pkt.pts;
937 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
938 pts_buffer[0]= pktl->pkt.pts;
939 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
940 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
941 if(pktl->pkt.dts == AV_NOPTS_VALUE)
942 pktl->pkt.dts= pts_buffer[0];
945 if (st->start_time == AV_NOPTS_VALUE)
946 st->start_time = pts;
949 static void update_initial_durations(AVFormatContext *s, AVStream *st,
950 int stream_index, int duration)
952 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
953 int64_t cur_dts= RELATIVE_TS_BASE;
955 if(st->first_dts != AV_NOPTS_VALUE){
956 cur_dts= st->first_dts;
957 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
958 if(pktl->pkt.stream_index == stream_index){
959 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
964 if(pktl && pktl->pkt.dts != st->first_dts) {
965 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in que\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts));
969 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
972 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
973 st->first_dts = cur_dts;
974 }else if(st->cur_dts != RELATIVE_TS_BASE)
977 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
978 if(pktl->pkt.stream_index != stream_index)
980 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
981 && !pktl->pkt.duration){
982 pktl->pkt.dts= cur_dts;
983 if(!st->codec->has_b_frames)
984 pktl->pkt.pts= cur_dts;
985 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
986 pktl->pkt.duration = duration;
989 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
992 st->cur_dts= cur_dts;
995 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
996 AVCodecParserContext *pc, AVPacket *pkt)
998 int num, den, presentation_delayed, delay, i;
1001 if (s->flags & AVFMT_FLAG_NOFILLIN)
1004 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1005 pkt->dts= AV_NOPTS_VALUE;
1007 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1008 //FIXME Set low_delay = 0 when has_b_frames = 1
1009 st->codec->has_b_frames = 1;
1011 /* do we have a video B-frame ? */
1012 delay= st->codec->has_b_frames;
1013 presentation_delayed = 0;
1015 /* XXX: need has_b_frame, but cannot get it if the codec is
1018 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1019 presentation_delayed = 1;
1021 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && st->pts_wrap_bits<63 && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts){
1022 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1023 pkt->dts -= 1LL<<st->pts_wrap_bits;
1025 pkt->pts += 1LL<<st->pts_wrap_bits;
1028 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1029 // we take the conservative approach and discard both
1030 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1031 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1032 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1033 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1034 pkt->dts= AV_NOPTS_VALUE;
1037 if (pkt->duration == 0) {
1038 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1040 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1043 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1044 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1046 /* correct timestamps with byte offset if demuxers only have timestamps
1047 on packet boundaries */
1048 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1049 /* this will estimate bitrate based on this frame's duration and size */
1050 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1051 if(pkt->pts != AV_NOPTS_VALUE)
1053 if(pkt->dts != AV_NOPTS_VALUE)
1057 if (pc && pc->dts_sync_point >= 0) {
1058 // we have synchronization info from the parser
1059 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1061 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1062 if (pkt->dts != AV_NOPTS_VALUE) {
1063 // got DTS from the stream, update reference timestamp
1064 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1065 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1066 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1067 // compute DTS based on reference timestamp
1068 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1069 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1071 if (pc->dts_sync_point > 0)
1072 st->reference_dts = pkt->dts; // new reference
1076 /* This may be redundant, but it should not hurt. */
1077 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1078 presentation_delayed = 1;
1080 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1081 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1082 /* interpolate PTS and DTS if they are not present */
1083 //We skip H264 currently because delay and has_b_frames are not reliably set
1084 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1085 if (presentation_delayed) {
1086 /* DTS = decompression timestamp */
1087 /* PTS = presentation timestamp */
1088 if (pkt->dts == AV_NOPTS_VALUE)
1089 pkt->dts = st->last_IP_pts;
1090 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1091 if (pkt->dts == AV_NOPTS_VALUE)
1092 pkt->dts = st->cur_dts;
1094 /* this is tricky: the dts must be incremented by the duration
1095 of the frame we are displaying, i.e. the last I- or P-frame */
1096 if (st->last_IP_duration == 0)
1097 st->last_IP_duration = pkt->duration;
1098 if(pkt->dts != AV_NOPTS_VALUE)
1099 st->cur_dts = pkt->dts + st->last_IP_duration;
1100 st->last_IP_duration = pkt->duration;
1101 st->last_IP_pts= pkt->pts;
1102 /* cannot compute PTS if not present (we can compute it only
1103 by knowing the future */
1104 } else if (pkt->pts != AV_NOPTS_VALUE ||
1105 pkt->dts != AV_NOPTS_VALUE ||
1107 int duration = pkt->duration;
1109 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1110 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1111 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1112 if( old_diff < new_diff && old_diff < (duration>>3)
1113 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1114 && (!strcmp(s->iformat->name, "mpeg") ||
1115 !strcmp(s->iformat->name, "mpegts"))){
1116 pkt->pts += duration;
1117 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1118 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1119 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1123 /* presentation is not delayed : PTS and DTS are the same */
1124 if (pkt->pts == AV_NOPTS_VALUE)
1125 pkt->pts = pkt->dts;
1126 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1128 if (pkt->pts == AV_NOPTS_VALUE)
1129 pkt->pts = st->cur_dts;
1130 pkt->dts = pkt->pts;
1131 if (pkt->pts != AV_NOPTS_VALUE)
1132 st->cur_dts = pkt->pts + duration;
1136 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1137 st->pts_buffer[0]= pkt->pts;
1138 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1139 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1140 if(pkt->dts == AV_NOPTS_VALUE)
1141 pkt->dts= st->pts_buffer[0];
1143 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1144 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1146 if(pkt->dts > st->cur_dts)
1147 st->cur_dts = pkt->dts;
1149 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1150 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1153 if (is_intra_only(st->codec))
1154 pkt->flags |= AV_PKT_FLAG_KEY;
1156 pkt->convergence_duration = pc->convergence_duration;
1159 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1162 AVPacketList *pktl = *pkt_buf;
1163 *pkt_buf = pktl->next;
1164 av_free_packet(&pktl->pkt);
1167 *pkt_buf_end = NULL;
1171 * Parse a packet, add all split parts to parse_queue
1173 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1175 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1177 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1178 AVStream *st = s->streams[stream_index];
1179 uint8_t *data = pkt ? pkt->data : NULL;
1180 int size = pkt ? pkt->size : 0;
1181 int ret = 0, got_output = 0;
1184 av_init_packet(&flush_pkt);
1187 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1188 // preserve 0-size sync packets
1189 compute_pkt_fields(s, st, st->parser, pkt);
1192 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1195 av_init_packet(&out_pkt);
1196 len = av_parser_parse2(st->parser, st->codec,
1197 &out_pkt.data, &out_pkt.size, data, size,
1198 pkt->pts, pkt->dts, pkt->pos);
1200 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1202 /* increment read pointer */
1206 got_output = !!out_pkt.size;
1211 /* set the duration */
1212 out_pkt.duration = 0;
1213 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1214 if (st->codec->sample_rate > 0) {
1215 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1216 (AVRational){ 1, st->codec->sample_rate },
1220 } else if (st->codec->time_base.num != 0 &&
1221 st->codec->time_base.den != 0) {
1222 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1223 st->codec->time_base,
1228 out_pkt.stream_index = st->index;
1229 out_pkt.pts = st->parser->pts;
1230 out_pkt.dts = st->parser->dts;
1231 out_pkt.pos = st->parser->pos;
1233 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1234 out_pkt.pos = st->parser->frame_offset;
1236 if (st->parser->key_frame == 1 ||
1237 (st->parser->key_frame == -1 &&
1238 st->parser->pict_type == AV_PICTURE_TYPE_I))
1239 out_pkt.flags |= AV_PKT_FLAG_KEY;
1241 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1242 out_pkt.flags |= AV_PKT_FLAG_KEY;
1244 compute_pkt_fields(s, st, st->parser, &out_pkt);
1246 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1247 out_pkt.destruct = pkt->destruct;
1248 pkt->destruct = NULL;
1250 if ((ret = av_dup_packet(&out_pkt)) < 0)
1253 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1254 av_free_packet(&out_pkt);
1255 ret = AVERROR(ENOMEM);
1261 /* end of the stream => close and free the parser */
1262 if (pkt == &flush_pkt) {
1263 av_parser_close(st->parser);
1268 av_free_packet(pkt);
1272 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1273 AVPacketList **pkt_buffer_end,
1277 av_assert0(*pkt_buffer);
1280 *pkt_buffer = pktl->next;
1282 *pkt_buffer_end = NULL;
1287 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1289 int ret = 0, i, got_packet = 0;
1291 av_init_packet(pkt);
1293 while (!got_packet && !s->parse_queue) {
1297 /* read next packet */
1298 ret = ff_read_packet(s, &cur_pkt);
1300 if (ret == AVERROR(EAGAIN))
1302 /* flush the parsers */
1303 for(i = 0; i < s->nb_streams; i++) {
1305 if (st->parser && st->need_parsing)
1306 parse_packet(s, NULL, st->index);
1308 /* all remaining packets are now in parse_queue =>
1309 * really terminate parsing */
1313 st = s->streams[cur_pkt.stream_index];
1315 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1316 cur_pkt.dts != AV_NOPTS_VALUE &&
1317 cur_pkt.pts < cur_pkt.dts) {
1318 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1319 cur_pkt.stream_index,
1320 av_ts2str(cur_pkt.pts),
1321 av_ts2str(cur_pkt.dts),
1324 if (s->debug & FF_FDEBUG_TS)
1325 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1326 cur_pkt.stream_index,
1327 av_ts2str(cur_pkt.pts),
1328 av_ts2str(cur_pkt.dts),
1333 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1334 st->parser = av_parser_init(st->codec->codec_id);
1336 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1337 "%s, packets or times may be invalid.\n",
1338 avcodec_get_name(st->codec->codec_id));
1339 /* no parser available: just output the raw packets */
1340 st->need_parsing = AVSTREAM_PARSE_NONE;
1341 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1342 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1343 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1344 st->parser->flags |= PARSER_FLAG_ONCE;
1345 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1346 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1350 if (!st->need_parsing || !st->parser) {
1351 /* no parsing needed: we just output the packet as is */
1353 compute_pkt_fields(s, st, NULL, pkt);
1354 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1355 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1356 ff_reduce_index(s, st->index);
1357 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1360 } else if (st->discard < AVDISCARD_ALL) {
1361 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1365 av_free_packet(&cur_pkt);
1367 if (pkt->flags & AV_PKT_FLAG_KEY)
1368 st->skip_to_keyframe = 0;
1369 if (st->skip_to_keyframe) {
1370 av_free_packet(&cur_pkt);
1375 if (!got_packet && s->parse_queue)
1376 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1378 if(s->debug & FF_FDEBUG_TS)
1379 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1381 av_ts2str(pkt->pts),
1382 av_ts2str(pkt->dts),
1390 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1392 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1398 ret = s->packet_buffer ?
1399 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1400 read_frame_internal(s, pkt);
1407 AVPacketList *pktl = s->packet_buffer;
1410 AVPacket *next_pkt = &pktl->pkt;
1412 if (next_pkt->dts != AV_NOPTS_VALUE) {
1413 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1414 // last dts seen for this stream. if any of packets following
1415 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1416 int64_t last_dts = next_pkt->dts;
1417 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1418 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1419 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1420 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1421 next_pkt->pts = pktl->pkt.dts;
1423 if (last_dts != AV_NOPTS_VALUE) {
1424 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1425 last_dts = pktl->pkt.dts;
1430 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1431 // Fixing the last reference frame had none pts issue (For MXF etc).
1432 // We only do this when
1434 // 2. we are not able to resolve a pts value for current packet.
1435 // 3. the packets for this stream at the end of the files had valid dts.
1436 next_pkt->pts = last_dts + next_pkt->duration;
1438 pktl = s->packet_buffer;
1441 /* read packet from packet buffer, if there is data */
1442 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1443 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1444 ret = read_from_packet_buffer(&s->packet_buffer,
1445 &s->packet_buffer_end, pkt);
1450 ret = read_frame_internal(s, pkt);
1452 if (pktl && ret != AVERROR(EAGAIN)) {
1459 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1460 &s->packet_buffer_end)) < 0)
1461 return AVERROR(ENOMEM);
1466 st = s->streams[pkt->stream_index];
1467 if (st->skip_samples) {
1468 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1469 AV_WL32(p, st->skip_samples);
1470 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1471 st->skip_samples = 0;
1474 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1475 ff_reduce_index(s, st->index);
1476 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1479 if (is_relative(pkt->dts))
1480 pkt->dts -= RELATIVE_TS_BASE;
1481 if (is_relative(pkt->pts))
1482 pkt->pts -= RELATIVE_TS_BASE;
1487 /* XXX: suppress the packet queue */
1488 static void flush_packet_queue(AVFormatContext *s)
1490 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1491 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1492 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1494 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1497 /*******************************************************/
1500 int av_find_default_stream_index(AVFormatContext *s)
1502 int first_audio_index = -1;
1506 if (s->nb_streams <= 0)
1508 for(i = 0; i < s->nb_streams; i++) {
1510 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1511 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1514 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1515 first_audio_index = i;
1517 return first_audio_index >= 0 ? first_audio_index : 0;
1521 * Flush the frame reader.
1523 void ff_read_frame_flush(AVFormatContext *s)
1528 flush_packet_queue(s);
1530 /* for each stream, reset read state */
1531 for(i = 0; i < s->nb_streams; i++) {
1535 av_parser_close(st->parser);
1538 st->last_IP_pts = AV_NOPTS_VALUE;
1539 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1540 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1541 st->reference_dts = AV_NOPTS_VALUE;
1543 st->probe_packets = MAX_PROBE_PACKETS;
1545 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1546 st->pts_buffer[j]= AV_NOPTS_VALUE;
1550 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1554 for(i = 0; i < s->nb_streams; i++) {
1555 AVStream *st = s->streams[i];
1557 st->cur_dts = av_rescale(timestamp,
1558 st->time_base.den * (int64_t)ref_st->time_base.num,
1559 st->time_base.num * (int64_t)ref_st->time_base.den);
1563 void ff_reduce_index(AVFormatContext *s, int stream_index)
1565 AVStream *st= s->streams[stream_index];
1566 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1568 if((unsigned)st->nb_index_entries >= max_entries){
1570 for(i=0; 2*i<st->nb_index_entries; i++)
1571 st->index_entries[i]= st->index_entries[2*i];
1572 st->nb_index_entries= i;
1576 int ff_add_index_entry(AVIndexEntry **index_entries,
1577 int *nb_index_entries,
1578 unsigned int *index_entries_allocated_size,
1579 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1581 AVIndexEntry *entries, *ie;
1584 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1587 if(timestamp == AV_NOPTS_VALUE)
1588 return AVERROR(EINVAL);
1590 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1591 timestamp -= RELATIVE_TS_BASE;
1593 entries = av_fast_realloc(*index_entries,
1594 index_entries_allocated_size,
1595 (*nb_index_entries + 1) *
1596 sizeof(AVIndexEntry));
1600 *index_entries= entries;
1602 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1605 index= (*nb_index_entries)++;
1606 ie= &entries[index];
1607 assert(index==0 || ie[-1].timestamp < timestamp);
1609 ie= &entries[index];
1610 if(ie->timestamp != timestamp){
1611 if(ie->timestamp <= timestamp)
1613 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1614 (*nb_index_entries)++;
1615 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1616 distance= ie->min_distance;
1620 ie->timestamp = timestamp;
1621 ie->min_distance= distance;
1628 int av_add_index_entry(AVStream *st,
1629 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1631 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1632 &st->index_entries_allocated_size, pos,
1633 timestamp, size, distance, flags);
1636 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1637 int64_t wanted_timestamp, int flags)
1645 //optimize appending index entries at the end
1646 if(b && entries[b-1].timestamp < wanted_timestamp)
1651 timestamp = entries[m].timestamp;
1652 if(timestamp >= wanted_timestamp)
1654 if(timestamp <= wanted_timestamp)
1657 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1659 if(!(flags & AVSEEK_FLAG_ANY)){
1660 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1661 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1670 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1673 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1674 wanted_timestamp, flags);
1677 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1679 AVInputFormat *avif= s->iformat;
1680 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1681 int64_t ts_min, ts_max, ts;
1686 if (stream_index < 0)
1689 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1692 ts_min= AV_NOPTS_VALUE;
1693 pos_limit= -1; //gcc falsely says it may be uninitialized
1695 st= s->streams[stream_index];
1696 if(st->index_entries){
1699 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()
1700 index= FFMAX(index, 0);
1701 e= &st->index_entries[index];
1703 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1705 ts_min= e->timestamp;
1706 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1707 pos_min, av_ts2str(ts_min));
1712 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1713 assert(index < st->nb_index_entries);
1715 e= &st->index_entries[index];
1716 assert(e->timestamp >= target_ts);
1718 ts_max= e->timestamp;
1719 pos_limit= pos_max - e->min_distance;
1720 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1721 pos_max, pos_limit, av_ts2str(ts_max));
1725 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1730 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1733 ff_read_frame_flush(s);
1734 ff_update_cur_dts(s, st, ts);
1739 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1740 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1741 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1742 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1745 int64_t start_pos, filesize;
1748 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1750 if(ts_min == AV_NOPTS_VALUE){
1751 pos_min = s->data_offset;
1752 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1753 if (ts_min == AV_NOPTS_VALUE)
1757 if(ts_min >= target_ts){
1762 if(ts_max == AV_NOPTS_VALUE){
1764 filesize = avio_size(s->pb);
1765 pos_max = filesize - 1;
1768 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1770 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1771 if (ts_max == AV_NOPTS_VALUE)
1775 int64_t tmp_pos= pos_max + 1;
1776 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1777 if(tmp_ts == AV_NOPTS_VALUE)
1781 if(tmp_pos >= filesize)
1787 if(ts_max <= target_ts){
1792 if(ts_min > ts_max){
1794 }else if(ts_min == ts_max){
1799 while (pos_min < pos_limit) {
1800 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1801 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1802 assert(pos_limit <= pos_max);
1805 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1806 // interpolate position (better than dichotomy)
1807 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1808 + pos_min - approximate_keyframe_distance;
1809 }else if(no_change==1){
1810 // bisection, if interpolation failed to change min or max pos last time
1811 pos = (pos_min + pos_limit)>>1;
1813 /* linear search if bisection failed, can only happen if there
1814 are very few or no keyframes between min/max */
1819 else if(pos > pos_limit)
1823 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1828 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1829 pos_min, pos, pos_max,
1830 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1831 pos_limit, start_pos, no_change);
1832 if(ts == AV_NOPTS_VALUE){
1833 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1836 assert(ts != AV_NOPTS_VALUE);
1837 if (target_ts <= ts) {
1838 pos_limit = start_pos - 1;
1842 if (target_ts >= ts) {
1848 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1849 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1852 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1854 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1855 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1856 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1862 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1863 int64_t pos_min, pos_max;
1865 pos_min = s->data_offset;
1866 pos_max = avio_size(s->pb) - 1;
1868 if (pos < pos_min) pos= pos_min;
1869 else if(pos > pos_max) pos= pos_max;
1871 avio_seek(s->pb, pos, SEEK_SET);
1876 static int seek_frame_generic(AVFormatContext *s,
1877 int stream_index, int64_t timestamp, int flags)
1884 st = s->streams[stream_index];
1886 index = av_index_search_timestamp(st, timestamp, flags);
1888 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1891 if(index < 0 || index==st->nb_index_entries-1){
1895 if(st->nb_index_entries){
1896 assert(st->index_entries);
1897 ie= &st->index_entries[st->nb_index_entries-1];
1898 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1900 ff_update_cur_dts(s, st, ie->timestamp);
1902 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1908 read_status = av_read_frame(s, &pkt);
1909 } while (read_status == AVERROR(EAGAIN));
1910 if (read_status < 0)
1912 av_free_packet(&pkt);
1913 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1914 if(pkt.flags & AV_PKT_FLAG_KEY)
1916 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1917 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);
1922 index = av_index_search_timestamp(st, timestamp, flags);
1927 ff_read_frame_flush(s);
1928 if (s->iformat->read_seek){
1929 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1932 ie = &st->index_entries[index];
1933 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1935 ff_update_cur_dts(s, st, ie->timestamp);
1940 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1941 int64_t timestamp, int flags)
1946 if (flags & AVSEEK_FLAG_BYTE) {
1947 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1949 ff_read_frame_flush(s);
1950 return seek_frame_byte(s, stream_index, timestamp, flags);
1953 if(stream_index < 0){
1954 stream_index= av_find_default_stream_index(s);
1955 if(stream_index < 0)
1958 st= s->streams[stream_index];
1959 /* timestamp for default must be expressed in AV_TIME_BASE units */
1960 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1963 /* first, we try the format specific seek */
1964 if (s->iformat->read_seek) {
1965 ff_read_frame_flush(s);
1966 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1973 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1974 ff_read_frame_flush(s);
1975 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1976 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1977 ff_read_frame_flush(s);
1978 return seek_frame_generic(s, stream_index, timestamp, flags);
1984 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1986 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1989 avformat_queue_attached_pictures(s);
1994 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1996 if(min_ts > ts || max_ts < ts)
1999 if (s->iformat->read_seek2) {
2001 ff_read_frame_flush(s);
2002 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2005 avformat_queue_attached_pictures(s);
2009 if(s->iformat->read_timestamp){
2010 //try to seek via read_timestamp()
2013 //Fallback to old API if new is not implemented but old is
2014 //Note the old has somewhat different semantics
2015 if (s->iformat->read_seek || 1) {
2016 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2017 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2018 if (ret<0 && ts != min_ts && max_ts != ts) {
2019 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2021 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2026 // try some generic seek like seek_frame_generic() but with new ts semantics
2029 /*******************************************************/
2032 * Return TRUE if the stream has accurate duration in any stream.
2034 * @return TRUE if the stream has accurate duration for at least one component.
2036 static int has_duration(AVFormatContext *ic)
2041 for(i = 0;i < ic->nb_streams; i++) {
2042 st = ic->streams[i];
2043 if (st->duration != AV_NOPTS_VALUE)
2046 if (ic->duration != AV_NOPTS_VALUE)
2052 * Estimate the stream timings from the one of each components.
2054 * Also computes the global bitrate if possible.
2056 static void update_stream_timings(AVFormatContext *ic)
2058 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2059 int64_t duration, duration1, filesize;
2064 start_time = INT64_MAX;
2065 start_time_text = INT64_MAX;
2066 end_time = INT64_MIN;
2067 duration = INT64_MIN;
2068 for(i = 0;i < ic->nb_streams; i++) {
2069 st = ic->streams[i];
2070 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2071 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2072 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2073 if (start_time1 < start_time_text)
2074 start_time_text = start_time1;
2076 start_time = FFMIN(start_time, start_time1);
2077 end_time1 = AV_NOPTS_VALUE;
2078 if (st->duration != AV_NOPTS_VALUE) {
2079 end_time1 = start_time1
2080 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2081 end_time = FFMAX(end_time, end_time1);
2083 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2084 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2085 p->start_time = start_time1;
2086 if(p->end_time < end_time1)
2087 p->end_time = end_time1;
2090 if (st->duration != AV_NOPTS_VALUE) {
2091 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2092 duration = FFMAX(duration, duration1);
2095 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2096 start_time = start_time_text;
2097 else if(start_time > start_time_text)
2098 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2100 if (start_time != INT64_MAX) {
2101 ic->start_time = start_time;
2102 if (end_time != INT64_MIN) {
2103 if (ic->nb_programs) {
2104 for (i=0; i<ic->nb_programs; i++) {
2105 p = ic->programs[i];
2106 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2107 duration = FFMAX(duration, p->end_time - p->start_time);
2110 duration = FFMAX(duration, end_time - start_time);
2113 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2114 ic->duration = duration;
2116 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2117 /* compute the bitrate */
2118 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2119 (double)ic->duration;
2123 static void fill_all_stream_timings(AVFormatContext *ic)
2128 update_stream_timings(ic);
2129 for(i = 0;i < ic->nb_streams; i++) {
2130 st = ic->streams[i];
2131 if (st->start_time == AV_NOPTS_VALUE) {
2132 if(ic->start_time != AV_NOPTS_VALUE)
2133 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2134 if(ic->duration != AV_NOPTS_VALUE)
2135 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2140 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2142 int64_t filesize, duration;
2146 /* if bit_rate is already set, we believe it */
2147 if (ic->bit_rate <= 0) {
2149 for(i=0;i<ic->nb_streams;i++) {
2150 st = ic->streams[i];
2151 if (st->codec->bit_rate > 0)
2152 bit_rate += st->codec->bit_rate;
2154 ic->bit_rate = bit_rate;
2157 /* if duration is already set, we believe it */
2158 if (ic->duration == AV_NOPTS_VALUE &&
2159 ic->bit_rate != 0) {
2160 filesize = ic->pb ? avio_size(ic->pb) : 0;
2162 for(i = 0; i < ic->nb_streams; i++) {
2163 st = ic->streams[i];
2164 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2165 if (st->duration == AV_NOPTS_VALUE)
2166 st->duration = duration;
2172 #define DURATION_MAX_READ_SIZE 250000LL
2173 #define DURATION_MAX_RETRY 4
2175 /* only usable for MPEG-PS streams */
2176 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2178 AVPacket pkt1, *pkt = &pkt1;
2180 int read_size, i, ret;
2182 int64_t filesize, offset, duration;
2185 /* flush packet queue */
2186 flush_packet_queue(ic);
2188 for (i=0; i<ic->nb_streams; i++) {
2189 st = ic->streams[i];
2190 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2191 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2194 av_parser_close(st->parser);
2199 /* estimate the end time (duration) */
2200 /* XXX: may need to support wrapping */
2201 filesize = ic->pb ? avio_size(ic->pb) : 0;
2202 end_time = AV_NOPTS_VALUE;
2204 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2208 avio_seek(ic->pb, offset, SEEK_SET);
2211 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2215 ret = ff_read_packet(ic, pkt);
2216 } while(ret == AVERROR(EAGAIN));
2219 read_size += pkt->size;
2220 st = ic->streams[pkt->stream_index];
2221 if (pkt->pts != AV_NOPTS_VALUE &&
2222 (st->start_time != AV_NOPTS_VALUE ||
2223 st->first_dts != AV_NOPTS_VALUE)) {
2224 duration = end_time = pkt->pts;
2225 if (st->start_time != AV_NOPTS_VALUE)
2226 duration -= st->start_time;
2228 duration -= st->first_dts;
2230 duration += 1LL<<st->pts_wrap_bits;
2232 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2233 st->duration = duration;
2236 av_free_packet(pkt);
2238 }while( end_time==AV_NOPTS_VALUE
2239 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2240 && ++retry <= DURATION_MAX_RETRY);
2242 fill_all_stream_timings(ic);
2244 avio_seek(ic->pb, old_offset, SEEK_SET);
2245 for (i=0; i<ic->nb_streams; i++) {
2247 st->cur_dts= st->first_dts;
2248 st->last_IP_pts = AV_NOPTS_VALUE;
2249 st->reference_dts = AV_NOPTS_VALUE;
2253 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2257 /* get the file size, if possible */
2258 if (ic->iformat->flags & AVFMT_NOFILE) {
2261 file_size = avio_size(ic->pb);
2262 file_size = FFMAX(0, file_size);
2265 if ((!strcmp(ic->iformat->name, "mpeg") ||
2266 !strcmp(ic->iformat->name, "mpegts")) &&
2267 file_size && ic->pb->seekable) {
2268 /* get accurate estimate from the PTSes */
2269 estimate_timings_from_pts(ic, old_offset);
2270 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2271 } else if (has_duration(ic)) {
2272 /* at least one component has timings - we use them for all
2274 fill_all_stream_timings(ic);
2275 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2277 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2278 /* less precise: use bitrate info */
2279 estimate_timings_from_bit_rate(ic);
2280 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2282 update_stream_timings(ic);
2286 AVStream av_unused *st;
2287 for(i = 0;i < ic->nb_streams; i++) {
2288 st = ic->streams[i];
2289 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2290 (double) st->start_time / AV_TIME_BASE,
2291 (double) st->duration / AV_TIME_BASE);
2293 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2294 (double) ic->start_time / AV_TIME_BASE,
2295 (double) ic->duration / AV_TIME_BASE,
2296 ic->bit_rate / 1000);
2300 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2302 AVCodecContext *avctx = st->codec;
2304 #define FAIL(errmsg) do { \
2306 *errmsg_ptr = errmsg; \
2310 switch (avctx->codec_type) {
2311 case AVMEDIA_TYPE_AUDIO:
2312 if (!avctx->frame_size && determinable_frame_size(avctx))
2313 FAIL("unspecified frame size");
2314 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2315 FAIL("unspecified sample format");
2316 if (!avctx->sample_rate)
2317 FAIL("unspecified sample rate");
2318 if (!avctx->channels)
2319 FAIL("unspecified number of channels");
2320 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2321 FAIL("no decodable DTS frames");
2323 case AVMEDIA_TYPE_VIDEO:
2325 FAIL("unspecified size");
2326 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2327 FAIL("unspecified pixel format");
2329 case AVMEDIA_TYPE_SUBTITLE:
2330 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2331 FAIL("unspecified size");
2333 case AVMEDIA_TYPE_DATA:
2334 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2337 if (avctx->codec_id == AV_CODEC_ID_NONE)
2338 FAIL("unknown codec");
2342 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2343 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2345 const AVCodec *codec;
2346 int got_picture = 1, ret = 0;
2347 AVFrame *frame = avcodec_alloc_frame();
2348 AVSubtitle subtitle;
2349 AVPacket pkt = *avpkt;
2352 return AVERROR(ENOMEM);
2354 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2355 AVDictionary *thread_opt = NULL;
2357 codec = st->codec->codec ? st->codec->codec :
2358 avcodec_find_decoder(st->codec->codec_id);
2361 st->info->found_decoder = -1;
2366 /* force thread count to 1 since the h264 decoder will not extract SPS
2367 * and PPS to extradata during multi-threaded decoding */
2368 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2369 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2371 av_dict_free(&thread_opt);
2373 st->info->found_decoder = -1;
2376 st->info->found_decoder = 1;
2377 } else if (!st->info->found_decoder)
2378 st->info->found_decoder = 1;
2380 if (st->info->found_decoder < 0) {
2385 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2387 (!has_codec_parameters(st, NULL) ||
2388 !has_decode_delay_been_guessed(st) ||
2389 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2391 avcodec_get_frame_defaults(frame);
2392 switch(st->codec->codec_type) {
2393 case AVMEDIA_TYPE_VIDEO:
2394 ret = avcodec_decode_video2(st->codec, frame,
2395 &got_picture, &pkt);
2397 case AVMEDIA_TYPE_AUDIO:
2398 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2400 case AVMEDIA_TYPE_SUBTITLE:
2401 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2402 &got_picture, &pkt);
2410 st->nb_decoded_frames++;
2417 if(!pkt.data && !got_picture)
2421 avcodec_free_frame(&frame);
2425 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2427 while (tags->id != AV_CODEC_ID_NONE) {
2435 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2438 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2439 if(tag == tags[i].tag)
2442 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2443 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2446 return AV_CODEC_ID_NONE;
2449 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2453 case 32: return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2454 case 64: return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2455 default: return AV_CODEC_ID_NONE;
2460 if (sflags & (1 << (bps - 1))) {
2462 case 1: return AV_CODEC_ID_PCM_S8;
2463 case 2: return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2464 case 3: return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2465 case 4: return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2466 default: return AV_CODEC_ID_NONE;
2470 case 1: return AV_CODEC_ID_PCM_U8;
2471 case 2: return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2472 case 3: return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2473 case 4: return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2474 default: return AV_CODEC_ID_NONE;
2480 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2483 for(i=0; tags && tags[i]; i++){
2484 int tag= ff_codec_get_tag(tags[i], id);
2490 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2493 for(i=0; tags && tags[i]; i++){
2494 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2495 if(id!=AV_CODEC_ID_NONE) return id;
2497 return AV_CODEC_ID_NONE;
2500 static void compute_chapters_end(AVFormatContext *s)
2503 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2505 for (i = 0; i < s->nb_chapters; i++)
2506 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2507 AVChapter *ch = s->chapters[i];
2508 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2511 for (j = 0; j < s->nb_chapters; j++) {
2512 AVChapter *ch1 = s->chapters[j];
2513 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2514 if (j != i && next_start > ch->start && next_start < end)
2517 ch->end = (end == INT64_MAX) ? ch->start : end;
2521 static int get_std_framerate(int i){
2522 if(i<60*12) return (i+1)*1001;
2523 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2527 * Is the time base unreliable.
2528 * This is a heuristic to balance between quick acceptance of the values in
2529 * the headers vs. some extra checks.
2530 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2531 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2532 * And there are "variable" fps files this needs to detect as well.
2534 static int tb_unreliable(AVCodecContext *c){
2535 if( c->time_base.den >= 101L*c->time_base.num
2536 || c->time_base.den < 5L*c->time_base.num
2537 /* || c->codec_tag == AV_RL32("DIVX")
2538 || c->codec_tag == AV_RL32("XVID")*/
2539 || c->codec_tag == AV_RL32("mp4v")
2540 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2541 || c->codec_id == AV_CODEC_ID_H264
2547 #if FF_API_FORMAT_PARAMETERS
2548 int av_find_stream_info(AVFormatContext *ic)
2550 return avformat_find_stream_info(ic, NULL);
2554 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2556 int i, count, ret, read_size, j;
2558 AVPacket pkt1, *pkt;
2559 int64_t old_offset = avio_tell(ic->pb);
2560 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2561 int flush_codecs = ic->probesize > 0;
2564 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2566 for(i=0;i<ic->nb_streams;i++) {
2567 const AVCodec *codec;
2568 AVDictionary *thread_opt = NULL;
2569 st = ic->streams[i];
2571 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2572 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2573 /* if(!st->time_base.num)
2575 if(!st->codec->time_base.num)
2576 st->codec->time_base= st->time_base;
2578 //only for the split stuff
2579 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2580 st->parser = av_parser_init(st->codec->codec_id);
2582 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2583 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2584 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2585 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2587 } else if (st->need_parsing) {
2588 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2589 "%s, packets or times may be invalid.\n",
2590 avcodec_get_name(st->codec->codec_id));
2593 codec = st->codec->codec ? st->codec->codec :
2594 avcodec_find_decoder(st->codec->codec_id);
2596 /* force thread count to 1 since the h264 decoder will not extract SPS
2597 * and PPS to extradata during multi-threaded decoding */
2598 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2600 /* Ensure that subtitle_header is properly set. */
2601 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2602 && codec && !st->codec->codec)
2603 avcodec_open2(st->codec, codec, options ? &options[i]
2606 //try to just open decoders, in case this is enough to get parameters
2607 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2608 if (codec && !st->codec->codec)
2609 avcodec_open2(st->codec, codec, options ? &options[i]
2613 av_dict_free(&thread_opt);
2616 for (i=0; i<ic->nb_streams; i++) {
2617 #if FF_API_R_FRAME_RATE
2618 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2620 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2621 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2627 if (ff_check_interrupt(&ic->interrupt_callback)){
2629 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2633 /* check if one codec still needs to be handled */
2634 for(i=0;i<ic->nb_streams;i++) {
2635 int fps_analyze_framecount = 20;
2637 st = ic->streams[i];
2638 if (!has_codec_parameters(st, NULL))
2640 /* if the timebase is coarse (like the usual millisecond precision
2641 of mkv), we need to analyze more frames to reliably arrive at
2643 if (av_q2d(st->time_base) > 0.0005)
2644 fps_analyze_framecount *= 2;
2645 if (ic->fps_probe_size >= 0)
2646 fps_analyze_framecount = ic->fps_probe_size;
2647 /* variable fps and no guess at the real fps */
2648 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2649 && st->info->duration_count < fps_analyze_framecount
2650 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2652 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2654 if (st->first_dts == AV_NOPTS_VALUE &&
2655 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2656 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2659 if (i == ic->nb_streams) {
2660 /* NOTE: if the format has no header, then we need to read
2661 some packets to get most of the streams, so we cannot
2663 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2664 /* if we found the info for all the codecs, we can stop */
2666 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2671 /* we did not get all the codec info, but we read too much data */
2672 if (read_size >= ic->probesize) {
2674 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2675 for (i = 0; i < ic->nb_streams; i++)
2676 if (!ic->streams[i]->r_frame_rate.num &&
2677 ic->streams[i]->info->duration_count <= 1)
2678 av_log(ic, AV_LOG_WARNING,
2679 "Stream #%d: not enough frames to estimate rate; "
2680 "consider increasing probesize\n", i);
2684 /* NOTE: a new stream can be added there if no header in file
2685 (AVFMTCTX_NOHEADER) */
2686 ret = read_frame_internal(ic, &pkt1);
2687 if (ret == AVERROR(EAGAIN))
2695 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2698 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2699 &ic->packet_buffer_end);
2700 if ((ret = av_dup_packet(pkt)) < 0)
2701 goto find_stream_info_err;
2704 read_size += pkt->size;
2706 st = ic->streams[pkt->stream_index];
2707 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2708 /* check for non-increasing dts */
2709 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2710 st->info->fps_last_dts >= pkt->dts) {
2711 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2712 "packet %d with DTS %"PRId64", packet %d with DTS "
2713 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2714 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2715 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2717 /* check for a discontinuity in dts - if the difference in dts
2718 * is more than 1000 times the average packet duration in the sequence,
2719 * we treat it as a discontinuity */
2720 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2721 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2722 (pkt->dts - st->info->fps_last_dts) / 1000 >
2723 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2724 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2725 "packet %d with DTS %"PRId64", packet %d with DTS "
2726 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2727 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2728 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2731 /* update stored dts values */
2732 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2733 st->info->fps_first_dts = pkt->dts;
2734 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2736 st->info->fps_last_dts = pkt->dts;
2737 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2739 if (st->codec_info_nb_frames>1) {
2741 if (st->time_base.den > 0)
2742 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2743 if (st->avg_frame_rate.num > 0)
2744 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2746 if (t >= ic->max_analyze_duration) {
2747 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2750 if (pkt->duration) {
2751 st->info->codec_info_duration += pkt->duration;
2752 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2755 #if FF_API_R_FRAME_RATE
2757 int64_t last = st->info->last_dts;
2759 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2760 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2761 int64_t duration= pkt->dts - last;
2763 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2764 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2765 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2766 int framerate= get_std_framerate(i);
2767 double sdts= dts*framerate/(1001*12);
2769 int64_t ticks= llrint(sdts+j*0.5);
2770 double error= sdts - ticks + j*0.5;
2771 st->info->duration_error[j][0][i] += error;
2772 st->info->duration_error[j][1][i] += error*error;
2775 st->info->duration_count++;
2776 // ignore the first 4 values, they might have some random jitter
2777 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2778 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2780 if (pkt->dts != AV_NOPTS_VALUE)
2781 st->info->last_dts = pkt->dts;
2784 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2785 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2786 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2787 st->codec->extradata_size= i;
2788 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2789 if (!st->codec->extradata)
2790 return AVERROR(ENOMEM);
2791 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2792 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2796 /* if still no information, we try to open the codec and to
2797 decompress the frame. We try to avoid that in most cases as
2798 it takes longer and uses more memory. For MPEG-4, we need to
2799 decompress for QuickTime.
2801 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2802 least one frame of codec data, this makes sure the codec initializes
2803 the channel configuration and does not only trust the values from the container.
2805 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2807 st->codec_info_nb_frames++;
2812 AVPacket empty_pkt = { 0 };
2814 av_init_packet(&empty_pkt);
2816 ret = -1; /* we could not have all the codec parameters before EOF */
2817 for(i=0;i<ic->nb_streams;i++) {
2820 st = ic->streams[i];
2822 /* flush the decoders */
2823 if (st->info->found_decoder == 1) {
2825 err = try_decode_frame(st, &empty_pkt,
2826 (options && i < orig_nb_streams) ?
2827 &options[i] : NULL);
2828 } while (err > 0 && !has_codec_parameters(st, NULL));
2831 av_log(ic, AV_LOG_INFO,
2832 "decoding for stream %d failed\n", st->index);
2836 if (!has_codec_parameters(st, &errmsg)) {
2838 avcodec_string(buf, sizeof(buf), st->codec, 0);
2839 av_log(ic, AV_LOG_WARNING,
2840 "Could not find codec parameters for stream %d (%s): %s\n"
2841 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2849 // close codecs which were opened in try_decode_frame()
2850 for(i=0;i<ic->nb_streams;i++) {
2851 st = ic->streams[i];
2852 avcodec_close(st->codec);
2854 for(i=0;i<ic->nb_streams;i++) {
2855 st = ic->streams[i];
2856 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2857 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2858 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2859 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2860 st->codec->codec_tag= tag;
2863 /* estimate average framerate if not set by demuxer */
2864 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2866 double best_error = 0.01;
2868 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2869 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2870 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2872 /* round guessed framerate to a "standard" framerate if it's
2873 * within 1% of the original estimate*/
2874 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2875 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2876 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2878 if (error < best_error) {
2880 best_fps = std_fps.num;
2884 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2885 best_fps, 12*1001, INT_MAX);
2888 // the check for tb_unreliable() is not completely correct, since this is not about handling
2889 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2890 // ipmovie.c produces.
2891 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)
2892 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);
2893 if (st->info->duration_count>1 && !st->r_frame_rate.num
2894 && tb_unreliable(st->codec)) {
2896 double best_error= 0.01;
2898 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2901 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2903 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2906 int n= st->info->duration_count;
2907 double a= st->info->duration_error[k][0][j] / n;
2908 double error= st->info->duration_error[k][1][j]/n - a*a;
2910 if(error < best_error && best_error> 0.000000001){
2912 num = get_std_framerate(j);
2915 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2918 // do not increase frame rate by more than 1 % in order to match a standard rate.
2919 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2920 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2923 if (!st->r_frame_rate.num){
2924 if( st->codec->time_base.den * (int64_t)st->time_base.num
2925 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2926 st->r_frame_rate.num = st->codec->time_base.den;
2927 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2929 st->r_frame_rate.num = st->time_base.den;
2930 st->r_frame_rate.den = st->time_base.num;
2933 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2934 if(!st->codec->bits_per_coded_sample)
2935 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2936 // set stream disposition based on audio service type
2937 switch (st->codec->audio_service_type) {
2938 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2939 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2940 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2941 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2942 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2943 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2944 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2945 st->disposition = AV_DISPOSITION_COMMENT; break;
2946 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2947 st->disposition = AV_DISPOSITION_KARAOKE; break;
2953 estimate_timings(ic, old_offset);
2955 compute_chapters_end(ic);
2957 find_stream_info_err:
2958 for (i=0; i < ic->nb_streams; i++) {
2959 if (ic->streams[i]->codec)
2960 ic->streams[i]->codec->thread_count = 0;
2961 av_freep(&ic->streams[i]->info);
2964 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2968 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2972 for (i = 0; i < ic->nb_programs; i++) {
2973 if (ic->programs[i] == last) {
2977 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2978 if (ic->programs[i]->stream_index[j] == s)
2979 return ic->programs[i];
2985 int av_find_best_stream(AVFormatContext *ic,
2986 enum AVMediaType type,
2987 int wanted_stream_nb,
2989 AVCodec **decoder_ret,
2992 int i, nb_streams = ic->nb_streams;
2993 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
2994 unsigned *program = NULL;
2995 AVCodec *decoder = NULL, *best_decoder = NULL;
2997 if (related_stream >= 0 && wanted_stream_nb < 0) {
2998 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3000 program = p->stream_index;
3001 nb_streams = p->nb_stream_indexes;
3004 for (i = 0; i < nb_streams; i++) {
3005 int real_stream_index = program ? program[i] : i;
3006 AVStream *st = ic->streams[real_stream_index];
3007 AVCodecContext *avctx = st->codec;
3008 if (avctx->codec_type != type)
3010 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3012 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
3015 decoder = avcodec_find_decoder(st->codec->codec_id);
3018 ret = AVERROR_DECODER_NOT_FOUND;
3022 count = st->codec_info_nb_frames;
3023 bitrate = avctx->bit_rate;
3024 multiframe = FFMIN(5, count);
3025 if ((best_multiframe > multiframe) ||
3026 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3027 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3030 best_bitrate = bitrate;
3031 best_multiframe = multiframe;
3032 ret = real_stream_index;
3033 best_decoder = decoder;
3034 if (program && i == nb_streams - 1 && ret < 0) {
3036 nb_streams = ic->nb_streams;
3037 i = 0; /* no related stream found, try again with everything */
3041 *decoder_ret = best_decoder;
3045 /*******************************************************/
3047 int av_read_play(AVFormatContext *s)
3049 if (s->iformat->read_play)
3050 return s->iformat->read_play(s);
3052 return avio_pause(s->pb, 0);
3053 return AVERROR(ENOSYS);
3056 int av_read_pause(AVFormatContext *s)
3058 if (s->iformat->read_pause)
3059 return s->iformat->read_pause(s);
3061 return avio_pause(s->pb, 1);
3062 return AVERROR(ENOSYS);
3065 void ff_free_stream(AVFormatContext *s, AVStream *st){
3066 av_assert0(s->nb_streams>0);
3067 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3070 av_parser_close(st->parser);
3072 if (st->attached_pic.data)
3073 av_free_packet(&st->attached_pic);
3074 av_dict_free(&st->metadata);
3075 av_freep(&st->index_entries);
3076 av_freep(&st->codec->extradata);
3077 av_freep(&st->codec->subtitle_header);
3078 av_freep(&st->codec);
3079 av_freep(&st->priv_data);
3080 av_freep(&st->info);
3081 av_freep(&st->probe_data.buf);
3082 av_freep(&s->streams[ --s->nb_streams ]);
3085 void avformat_free_context(AVFormatContext *s)
3093 if (s->iformat && s->iformat->priv_class && s->priv_data)
3094 av_opt_free(s->priv_data);
3096 for(i=s->nb_streams-1; i>=0; i--) {
3097 ff_free_stream(s, s->streams[i]);
3099 for(i=s->nb_programs-1; i>=0; i--) {
3100 av_dict_free(&s->programs[i]->metadata);
3101 av_freep(&s->programs[i]->stream_index);
3102 av_freep(&s->programs[i]);
3104 av_freep(&s->programs);
3105 av_freep(&s->priv_data);
3106 while(s->nb_chapters--) {
3107 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3108 av_freep(&s->chapters[s->nb_chapters]);
3110 av_freep(&s->chapters);
3111 av_dict_free(&s->metadata);
3112 av_freep(&s->streams);
3116 #if FF_API_CLOSE_INPUT_FILE
3117 void av_close_input_file(AVFormatContext *s)
3119 avformat_close_input(&s);
3123 void avformat_close_input(AVFormatContext **ps)
3125 AVFormatContext *s = *ps;
3126 AVIOContext *pb = s->pb;
3128 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3129 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3132 flush_packet_queue(s);
3135 if (s->iformat->read_close)
3136 s->iformat->read_close(s);
3139 avformat_free_context(s);
3146 #if FF_API_NEW_STREAM
3147 AVStream *av_new_stream(AVFormatContext *s, int id)
3149 AVStream *st = avformat_new_stream(s, NULL);
3156 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3162 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3164 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3167 s->streams = streams;
3169 st = av_mallocz(sizeof(AVStream));
3172 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3176 st->info->last_dts = AV_NOPTS_VALUE;
3178 st->codec = avcodec_alloc_context3(c);
3180 /* no default bitrate if decoding */
3181 st->codec->bit_rate = 0;
3183 st->index = s->nb_streams;
3184 st->start_time = AV_NOPTS_VALUE;
3185 st->duration = AV_NOPTS_VALUE;
3186 /* we set the current DTS to 0 so that formats without any timestamps
3187 but durations get some timestamps, formats with some unknown
3188 timestamps have their first few packets buffered and the
3189 timestamps corrected before they are returned to the user */
3190 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3191 st->first_dts = AV_NOPTS_VALUE;
3192 st->probe_packets = MAX_PROBE_PACKETS;
3194 /* default pts setting is MPEG-like */
3195 avpriv_set_pts_info(st, 33, 1, 90000);
3196 st->last_IP_pts = AV_NOPTS_VALUE;
3197 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3198 st->pts_buffer[i]= AV_NOPTS_VALUE;
3199 st->reference_dts = AV_NOPTS_VALUE;
3201 st->sample_aspect_ratio = (AVRational){0,1};
3203 #if FF_API_R_FRAME_RATE
3204 st->info->last_dts = AV_NOPTS_VALUE;
3206 st->info->fps_first_dts = AV_NOPTS_VALUE;
3207 st->info->fps_last_dts = AV_NOPTS_VALUE;
3209 s->streams[s->nb_streams++] = st;
3213 AVProgram *av_new_program(AVFormatContext *ac, int id)
3215 AVProgram *program=NULL;
3218 av_dlog(ac, "new_program: id=0x%04x\n", id);
3220 for(i=0; i<ac->nb_programs; i++)
3221 if(ac->programs[i]->id == id)
3222 program = ac->programs[i];
3225 program = av_mallocz(sizeof(AVProgram));
3228 dynarray_add(&ac->programs, &ac->nb_programs, program);
3229 program->discard = AVDISCARD_NONE;
3233 program->start_time =
3234 program->end_time = AV_NOPTS_VALUE;
3239 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3241 AVChapter *chapter = NULL;
3244 for(i=0; i<s->nb_chapters; i++)
3245 if(s->chapters[i]->id == id)
3246 chapter = s->chapters[i];
3249 chapter= av_mallocz(sizeof(AVChapter));
3252 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3254 av_dict_set(&chapter->metadata, "title", title, 0);
3256 chapter->time_base= time_base;
3257 chapter->start = start;
3263 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3266 AVProgram *program=NULL;
3269 if (idx >= ac->nb_streams) {
3270 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3274 for(i=0; i<ac->nb_programs; i++){
3275 if(ac->programs[i]->id != progid)
3277 program = ac->programs[i];
3278 for(j=0; j<program->nb_stream_indexes; j++)
3279 if(program->stream_index[j] == idx)
3282 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3285 program->stream_index = tmp;
3286 program->stream_index[program->nb_stream_indexes++] = idx;
3291 static void print_fps(double d, const char *postfix){
3292 uint64_t v= lrintf(d*100);
3293 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3294 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3295 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3298 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3300 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3301 AVDictionaryEntry *tag=NULL;
3303 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3304 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3305 if(strcmp("language", tag->key)){
3306 const char *p = tag->value;
3307 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3310 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3311 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3312 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3314 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3315 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3318 av_log(ctx, AV_LOG_INFO, "\n");
3324 /* "user interface" functions */
3325 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3328 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3329 AVStream *st = ic->streams[i];
3330 int g = av_gcd(st->time_base.num, st->time_base.den);
3331 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3332 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3333 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3334 /* the pid is an important information, so we display it */
3335 /* XXX: add a generic system */
3336 if (flags & AVFMT_SHOW_IDS)
3337 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3339 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3340 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3341 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3342 if (st->sample_aspect_ratio.num && // default
3343 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3344 AVRational display_aspect_ratio;
3345 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3346 st->codec->width*st->sample_aspect_ratio.num,
3347 st->codec->height*st->sample_aspect_ratio.den,
3349 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3350 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3351 display_aspect_ratio.num, display_aspect_ratio.den);
3353 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3354 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3355 print_fps(av_q2d(st->avg_frame_rate), "fps");
3356 #if FF_API_R_FRAME_RATE
3357 if(st->r_frame_rate.den && st->r_frame_rate.num)
3358 print_fps(av_q2d(st->r_frame_rate), "tbr");
3360 if(st->time_base.den && st->time_base.num)
3361 print_fps(1/av_q2d(st->time_base), "tbn");
3362 if(st->codec->time_base.den && st->codec->time_base.num)
3363 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3365 if (st->disposition & AV_DISPOSITION_DEFAULT)
3366 av_log(NULL, AV_LOG_INFO, " (default)");
3367 if (st->disposition & AV_DISPOSITION_DUB)
3368 av_log(NULL, AV_LOG_INFO, " (dub)");
3369 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3370 av_log(NULL, AV_LOG_INFO, " (original)");
3371 if (st->disposition & AV_DISPOSITION_COMMENT)
3372 av_log(NULL, AV_LOG_INFO, " (comment)");
3373 if (st->disposition & AV_DISPOSITION_LYRICS)
3374 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3375 if (st->disposition & AV_DISPOSITION_KARAOKE)
3376 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3377 if (st->disposition & AV_DISPOSITION_FORCED)
3378 av_log(NULL, AV_LOG_INFO, " (forced)");
3379 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3380 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3381 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3382 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3383 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3384 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3385 av_log(NULL, AV_LOG_INFO, "\n");
3386 dump_metadata(NULL, st->metadata, " ");
3389 void av_dump_format(AVFormatContext *ic,
3395 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3396 if (ic->nb_streams && !printed)
3399 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3400 is_output ? "Output" : "Input",
3402 is_output ? ic->oformat->name : ic->iformat->name,
3403 is_output ? "to" : "from", url);
3404 dump_metadata(NULL, ic->metadata, " ");
3406 av_log(NULL, AV_LOG_INFO, " Duration: ");
3407 if (ic->duration != AV_NOPTS_VALUE) {
3408 int hours, mins, secs, us;
3409 int64_t duration = ic->duration + 5000;
3410 secs = duration / AV_TIME_BASE;
3411 us = duration % AV_TIME_BASE;
3416 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3417 (100 * us) / AV_TIME_BASE);
3419 av_log(NULL, AV_LOG_INFO, "N/A");
3421 if (ic->start_time != AV_NOPTS_VALUE) {
3423 av_log(NULL, AV_LOG_INFO, ", start: ");
3424 secs = ic->start_time / AV_TIME_BASE;
3425 us = abs(ic->start_time % AV_TIME_BASE);
3426 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3427 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3429 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3431 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3433 av_log(NULL, AV_LOG_INFO, "N/A");
3435 av_log(NULL, AV_LOG_INFO, "\n");
3437 for (i = 0; i < ic->nb_chapters; i++) {
3438 AVChapter *ch = ic->chapters[i];
3439 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3440 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3441 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3443 dump_metadata(NULL, ch->metadata, " ");
3445 if(ic->nb_programs) {
3446 int j, k, total = 0;
3447 for(j=0; j<ic->nb_programs; j++) {
3448 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3450 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3451 name ? name->value : "");
3452 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3453 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3454 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3455 printed[ic->programs[j]->stream_index[k]] = 1;
3457 total += ic->programs[j]->nb_stream_indexes;
3459 if (total < ic->nb_streams)
3460 av_log(NULL, AV_LOG_INFO, " No Program\n");
3462 for(i=0;i<ic->nb_streams;i++)
3464 dump_stream_format(ic, i, index, is_output);
3469 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3470 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3472 return av_gettime();
3476 uint64_t ff_ntp_time(void)
3478 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3481 int av_get_frame_filename(char *buf, int buf_size,
3482 const char *path, int number)
3485 char *q, buf1[20], c;
3486 int nd, len, percentd_found;
3498 while (isdigit(*p)) {
3499 nd = nd * 10 + *p++ - '0';
3502 } while (isdigit(c));
3511 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3513 if ((q - buf + len) > buf_size - 1)
3515 memcpy(q, buf1, len);
3523 if ((q - buf) < buf_size - 1)
3527 if (!percentd_found)
3536 static void hex_dump_internal(void *avcl, FILE *f, int level,
3537 const uint8_t *buf, int size)
3540 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3542 for(i=0;i<size;i+=16) {
3549 PRINT(" %02x", buf[i+j]);
3554 for(j=0;j<len;j++) {
3556 if (c < ' ' || c > '~')
3565 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3567 hex_dump_internal(NULL, f, 0, buf, size);
3570 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3572 hex_dump_internal(avcl, NULL, level, buf, size);
3575 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3577 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3578 PRINT("stream #%d:\n", pkt->stream_index);
3579 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3580 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3581 /* DTS is _always_ valid after av_read_frame() */
3583 if (pkt->dts == AV_NOPTS_VALUE)
3586 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3587 /* PTS may not be known if B-frames are present. */
3589 if (pkt->pts == AV_NOPTS_VALUE)
3592 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3594 PRINT(" size=%d\n", pkt->size);
3597 av_hex_dump(f, pkt->data, pkt->size);
3601 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3603 AVRational tb = { 1, AV_TIME_BASE };
3604 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3608 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3610 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3614 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3616 AVRational tb = { 1, AV_TIME_BASE };
3617 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3621 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3624 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3627 void av_url_split(char *proto, int proto_size,
3628 char *authorization, int authorization_size,
3629 char *hostname, int hostname_size,
3631 char *path, int path_size,
3634 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3636 if (port_ptr) *port_ptr = -1;
3637 if (proto_size > 0) proto[0] = 0;
3638 if (authorization_size > 0) authorization[0] = 0;
3639 if (hostname_size > 0) hostname[0] = 0;
3640 if (path_size > 0) path[0] = 0;
3642 /* parse protocol */
3643 if ((p = strchr(url, ':'))) {
3644 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3649 /* no protocol means plain filename */
3650 av_strlcpy(path, url, path_size);
3654 /* separate path from hostname */
3655 ls = strchr(p, '/');
3656 ls2 = strchr(p, '?');
3660 ls = FFMIN(ls, ls2);
3662 av_strlcpy(path, ls, path_size);
3664 ls = &p[strlen(p)]; // XXX
3666 /* the rest is hostname, use that to parse auth/port */
3668 /* authorization (user[:pass]@hostname) */
3670 while ((at = strchr(p, '@')) && at < ls) {
3671 av_strlcpy(authorization, at2,
3672 FFMIN(authorization_size, at + 1 - at2));
3673 p = at + 1; /* skip '@' */
3676 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3678 av_strlcpy(hostname, p + 1,
3679 FFMIN(hostname_size, brk - p));
3680 if (brk[1] == ':' && port_ptr)
3681 *port_ptr = atoi(brk + 2);
3682 } else if ((col = strchr(p, ':')) && col < ls) {
3683 av_strlcpy(hostname, p,
3684 FFMIN(col + 1 - p, hostname_size));
3685 if (port_ptr) *port_ptr = atoi(col + 1);
3687 av_strlcpy(hostname, p,
3688 FFMIN(ls + 1 - p, hostname_size));
3692 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3695 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3698 'C', 'D', 'E', 'F' };
3699 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3702 'c', 'd', 'e', 'f' };
3703 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3705 for(i = 0; i < s; i++) {
3706 buff[i * 2] = hex_table[src[i] >> 4];
3707 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3713 int ff_hex_to_data(uint8_t *data, const char *p)
3720 p += strspn(p, SPACE_CHARS);
3723 c = toupper((unsigned char) *p++);
3724 if (c >= '0' && c <= '9')
3726 else if (c >= 'A' && c <= 'F')
3741 #if FF_API_SET_PTS_INFO
3742 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3743 unsigned int pts_num, unsigned int pts_den)
3745 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3749 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3750 unsigned int pts_num, unsigned int pts_den)
3753 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3754 if(new_tb.num != pts_num)
3755 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3757 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3759 if(new_tb.num <= 0 || new_tb.den <= 0) {
3760 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);
3763 s->time_base = new_tb;
3764 av_codec_set_pkt_timebase(s->codec, new_tb);
3765 s->pts_wrap_bits = pts_wrap_bits;
3768 int ff_url_join(char *str, int size, const char *proto,
3769 const char *authorization, const char *hostname,
3770 int port, const char *fmt, ...)
3773 struct addrinfo hints = { 0 }, *ai;
3778 av_strlcatf(str, size, "%s://", proto);
3779 if (authorization && authorization[0])
3780 av_strlcatf(str, size, "%s@", authorization);
3781 #if CONFIG_NETWORK && defined(AF_INET6)
3782 /* Determine if hostname is a numerical IPv6 address,
3783 * properly escape it within [] in that case. */
3784 hints.ai_flags = AI_NUMERICHOST;
3785 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3786 if (ai->ai_family == AF_INET6) {
3787 av_strlcat(str, "[", size);
3788 av_strlcat(str, hostname, size);
3789 av_strlcat(str, "]", size);
3791 av_strlcat(str, hostname, size);
3796 /* Not an IPv6 address, just output the plain string. */
3797 av_strlcat(str, hostname, size);
3800 av_strlcatf(str, size, ":%d", port);
3803 int len = strlen(str);
3806 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3812 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3813 AVFormatContext *src)
3818 local_pkt.stream_index = dst_stream;
3819 if (pkt->pts != AV_NOPTS_VALUE)
3820 local_pkt.pts = av_rescale_q(pkt->pts,
3821 src->streams[pkt->stream_index]->time_base,
3822 dst->streams[dst_stream]->time_base);
3823 if (pkt->dts != AV_NOPTS_VALUE)
3824 local_pkt.dts = av_rescale_q(pkt->dts,
3825 src->streams[pkt->stream_index]->time_base,
3826 dst->streams[dst_stream]->time_base);
3827 return av_write_frame(dst, &local_pkt);
3830 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3833 const char *ptr = str;
3835 /* Parse key=value pairs. */
3838 char *dest = NULL, *dest_end;
3839 int key_len, dest_len = 0;
3841 /* Skip whitespace and potential commas. */
3842 while (*ptr && (isspace(*ptr) || *ptr == ','))
3849 if (!(ptr = strchr(key, '=')))
3852 key_len = ptr - key;
3854 callback_get_buf(context, key, key_len, &dest, &dest_len);
3855 dest_end = dest + dest_len - 1;
3859 while (*ptr && *ptr != '\"') {
3863 if (dest && dest < dest_end)
3867 if (dest && dest < dest_end)
3875 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3876 if (dest && dest < dest_end)
3884 int ff_find_stream_index(AVFormatContext *s, int id)
3887 for (i = 0; i < s->nb_streams; i++) {
3888 if (s->streams[i]->id == id)
3894 void ff_make_absolute_url(char *buf, int size, const char *base,
3897 char *sep, *path_query;
3898 /* Absolute path, relative to the current server */
3899 if (base && strstr(base, "://") && rel[0] == '/') {
3901 av_strlcpy(buf, base, size);
3902 sep = strstr(buf, "://");
3904 /* Take scheme from base url */
3905 if (rel[1] == '/') {
3908 /* Take scheme and host from base url */
3910 sep = strchr(sep, '/');
3915 av_strlcat(buf, rel, size);
3918 /* If rel actually is an absolute url, just copy it */
3919 if (!base || strstr(rel, "://") || rel[0] == '/') {
3920 av_strlcpy(buf, rel, size);
3924 av_strlcpy(buf, base, size);
3926 /* Strip off any query string from base */
3927 path_query = strchr(buf, '?');
3928 if (path_query != NULL)
3931 /* Is relative path just a new query part? */
3932 if (rel[0] == '?') {
3933 av_strlcat(buf, rel, size);
3937 /* Remove the file name from the base url */
3938 sep = strrchr(buf, '/');
3943 while (av_strstart(rel, "../", NULL) && sep) {
3944 /* Remove the path delimiter at the end */
3946 sep = strrchr(buf, '/');
3947 /* If the next directory name to pop off is "..", break here */
3948 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3949 /* Readd the slash we just removed */
3950 av_strlcat(buf, "/", size);
3953 /* Cut off the directory name */
3960 av_strlcat(buf, rel, size);
3963 int64_t ff_iso8601_to_unix_time(const char *datestr)
3965 struct tm time1 = {0}, time2 = {0};
3967 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3968 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3970 return av_timegm(&time2);
3972 return av_timegm(&time1);
3975 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3978 if (ofmt->query_codec)
3979 return ofmt->query_codec(codec_id, std_compliance);
3980 else if (ofmt->codec_tag)
3981 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3982 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3983 codec_id == ofmt->subtitle_codec)
3986 return AVERROR_PATCHWELCOME;
3989 int avformat_network_init(void)
3993 ff_network_inited_globally = 1;
3994 if ((ret = ff_network_init()) < 0)
4001 int avformat_network_deinit(void)
4010 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4011 uint64_t channel_layout, int32_t sample_rate,
4012 int32_t width, int32_t height)
4018 return AVERROR(EINVAL);
4021 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4023 if (channel_layout) {
4025 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4029 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4031 if (width || height) {
4033 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4035 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4037 return AVERROR(ENOMEM);
4038 bytestream_put_le32(&data, flags);
4040 bytestream_put_le32(&data, channels);
4042 bytestream_put_le64(&data, channel_layout);
4044 bytestream_put_le32(&data, sample_rate);
4045 if (width || height) {
4046 bytestream_put_le32(&data, width);
4047 bytestream_put_le32(&data, height);
4052 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4054 return ff_codec_bmp_tags;
4056 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4058 return ff_codec_wav_tags;
4061 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4063 AVRational undef = {0, 1};
4064 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4065 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4066 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4068 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4069 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4070 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4071 stream_sample_aspect_ratio = undef;
4073 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4074 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4075 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4076 frame_sample_aspect_ratio = undef;
4078 if (stream_sample_aspect_ratio.num)
4079 return stream_sample_aspect_ratio;
4081 return frame_sample_aspect_ratio;
4084 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4087 if (*spec <= '9' && *spec >= '0') /* opt:index */
4088 return strtol(spec, NULL, 0) == st->index;
4089 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4090 *spec == 't') { /* opt:[vasdt] */
4091 enum AVMediaType type;
4094 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4095 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4096 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4097 case 'd': type = AVMEDIA_TYPE_DATA; break;
4098 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4099 default: av_assert0(0);
4101 if (type != st->codec->codec_type)
4103 if (*spec++ == ':') { /* possibly followed by :index */
4104 int i, index = strtol(spec, NULL, 0);
4105 for (i = 0; i < s->nb_streams; i++)
4106 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4107 return i == st->index;
4111 } else if (*spec == 'p' && *(spec + 1) == ':') {
4115 prog_id = strtol(spec, &endptr, 0);
4116 for (i = 0; i < s->nb_programs; i++) {
4117 if (s->programs[i]->id != prog_id)
4120 if (*endptr++ == ':') {
4121 int stream_idx = strtol(endptr, NULL, 0);
4122 return stream_idx >= 0 &&
4123 stream_idx < s->programs[i]->nb_stream_indexes &&
4124 st->index == s->programs[i]->stream_index[stream_idx];
4127 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4128 if (st->index == s->programs[i]->stream_index[j])
4132 } else if (*spec == '#') {
4135 sid = strtol(spec + 1, &endptr, 0);
4137 return st->id == sid;
4138 } else if (!*spec) /* empty specifier, matches everything */
4141 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4142 return AVERROR(EINVAL);