2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/pixdesc.h"
36 #include "libavutil/avassert.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/time.h"
41 #include "libavutil/timestamp.h"
43 #include "audiointerleave.h"
55 * various utility functions for use within FFmpeg
58 unsigned avformat_version(void)
60 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
61 return LIBAVFORMAT_VERSION_INT;
64 const char *avformat_configuration(void)
66 return FFMPEG_CONFIGURATION;
69 const char *avformat_license(void)
71 #define LICENSE_PREFIX "libavformat license: "
72 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
75 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
77 static int is_relative(int64_t ts) {
78 return ts > (RELATIVE_TS_BASE - (1LL<<48));
81 /** head of registered input format linked list */
82 static AVInputFormat *first_iformat = NULL;
83 /** head of registered output format linked list */
84 static AVOutputFormat *first_oformat = NULL;
86 AVInputFormat *av_iformat_next(AVInputFormat *f)
89 else return first_iformat;
92 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
95 else return first_oformat;
98 void av_register_input_format(AVInputFormat *format)
102 while (*p != NULL) p = &(*p)->next;
107 void av_register_output_format(AVOutputFormat *format)
111 while (*p != NULL) p = &(*p)->next;
116 int av_match_ext(const char *filename, const char *extensions)
124 ext = strrchr(filename, '.');
130 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
133 if (!av_strcasecmp(ext1, ext))
143 static int match_format(const char *name, const char *names)
151 namelen = strlen(name);
152 while ((p = strchr(names, ','))) {
153 len = FFMAX(p - names, namelen);
154 if (!av_strncasecmp(name, names, len))
158 return !av_strcasecmp(name, names);
161 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
162 const char *mime_type)
164 AVOutputFormat *fmt = NULL, *fmt_found;
165 int score_max, score;
167 /* specific test for image sequences */
168 #if CONFIG_IMAGE2_MUXER
169 if (!short_name && filename &&
170 av_filename_number_test(filename) &&
171 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
172 return av_guess_format("image2", NULL, NULL);
175 /* Find the proper file type. */
178 while ((fmt = av_oformat_next(fmt))) {
180 if (fmt->name && short_name && match_format(short_name, fmt->name))
182 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
184 if (filename && fmt->extensions &&
185 av_match_ext(filename, fmt->extensions)) {
188 if (score > score_max) {
196 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
197 const char *filename, const char *mime_type, enum AVMediaType type){
198 if(type == AVMEDIA_TYPE_VIDEO){
199 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
201 #if CONFIG_IMAGE2_MUXER
202 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
203 codec_id= ff_guess_image2_codec(filename);
206 if(codec_id == AV_CODEC_ID_NONE)
207 codec_id= fmt->video_codec;
209 }else if(type == AVMEDIA_TYPE_AUDIO)
210 return fmt->audio_codec;
211 else if (type == AVMEDIA_TYPE_SUBTITLE)
212 return fmt->subtitle_codec;
214 return AV_CODEC_ID_NONE;
217 AVInputFormat *av_find_input_format(const char *short_name)
219 AVInputFormat *fmt = NULL;
220 while ((fmt = av_iformat_next(fmt))) {
221 if (match_format(short_name, fmt->name))
227 int ffio_limit(AVIOContext *s, int size)
230 int64_t remaining= s->maxsize - avio_tell(s);
231 if(remaining < size){
232 int64_t newsize= avio_size(s);
233 if(!s->maxsize || s->maxsize<newsize)
234 s->maxsize= newsize - !newsize;
235 remaining= s->maxsize - avio_tell(s);
236 remaining= FFMAX(remaining, 0);
239 if(s->maxsize>=0 && remaining+1 < size){
240 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
247 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
250 int orig_size = size;
251 size= ffio_limit(s, size);
253 ret= av_new_packet(pkt, size);
258 pkt->pos= avio_tell(s);
260 ret= avio_read(s, pkt->data, size);
264 av_shrink_packet(pkt, ret);
265 if (pkt->size < orig_size)
266 pkt->flags |= AV_PKT_FLAG_CORRUPT;
271 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
276 return av_get_packet(s, pkt, size);
277 old_size = pkt->size;
278 ret = av_grow_packet(pkt, size);
281 ret = avio_read(s, pkt->data + old_size, size);
282 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
287 int av_filename_number_test(const char *filename)
290 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
293 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
295 AVProbeData lpd = *pd;
296 AVInputFormat *fmt1 = NULL, *fmt;
297 int score, nodat = 0, score_max=0;
298 const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
301 lpd.buf = zerobuffer;
303 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
304 int id3len = ff_id3v2_tag_len(lpd.buf);
305 if (lpd.buf_size > id3len + 16) {
307 lpd.buf_size -= id3len;
313 while ((fmt1 = av_iformat_next(fmt1))) {
314 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
317 if (fmt1->read_probe) {
318 score = fmt1->read_probe(&lpd);
319 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
320 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
321 } else if (fmt1->extensions) {
322 if (av_match_ext(lpd.filename, fmt1->extensions)) {
326 if (score > score_max) {
329 }else if (score == score_max)
332 *score_ret= score_max;
337 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
340 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
341 if(score_ret > *score_max){
342 *score_max= score_ret;
348 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
350 return av_probe_input_format2(pd, is_opened, &score);
353 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
355 static const struct {
356 const char *name; enum AVCodecID id; enum AVMediaType type;
358 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
359 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
360 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
361 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
362 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
363 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
364 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
365 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
366 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
372 if (fmt && st->request_probe <= score) {
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
390 int av_demuxer_open(AVFormatContext *ic){
393 if (ic->iformat->read_header) {
394 err = ic->iformat->read_header(ic);
399 if (ic->pb && !ic->data_offset)
400 ic->data_offset = avio_tell(ic->pb);
406 /** size of probe buffer, for guessing file type from file contents */
407 #define PROBE_BUF_MIN 2048
408 #define PROBE_BUF_MAX (1<<20)
410 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
411 const char *filename, void *logctx,
412 unsigned int offset, unsigned int max_probe_size)
414 AVProbeData pd = { filename ? filename : "", NULL, -offset };
415 unsigned char *buf = NULL;
416 int ret = 0, probe_size;
418 if (!max_probe_size) {
419 max_probe_size = PROBE_BUF_MAX;
420 } else if (max_probe_size > PROBE_BUF_MAX) {
421 max_probe_size = PROBE_BUF_MAX;
422 } else if (max_probe_size < PROBE_BUF_MIN) {
423 return AVERROR(EINVAL);
426 if (offset >= max_probe_size) {
427 return AVERROR(EINVAL);
430 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
431 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
432 int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;
433 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
436 if (probe_size < offset) {
440 /* read probe data */
441 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
444 return AVERROR(ENOMEM);
447 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
448 /* fail if error was not end of file, otherwise, lower score */
449 if (ret != AVERROR_EOF) {
454 ret = 0; /* error was end of file, nothing read */
457 pd.buf = &buf[offset];
459 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
461 /* guess file format */
462 *fmt = av_probe_input_format2(&pd, 1, &score);
464 if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration
465 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
467 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
473 return AVERROR_INVALIDDATA;
476 /* rewind. reuse probe buffer to avoid seeking */
477 ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size);
482 /* open input file and probe the format if necessary */
483 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
486 AVProbeData pd = {filename, NULL, 0};
487 int score = AVPROBE_SCORE_RETRY;
490 s->flags |= AVFMT_FLAG_CUSTOM_IO;
492 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
493 else if (s->iformat->flags & AVFMT_NOFILE)
494 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
495 "will be ignored with AVFMT_NOFILE format.\n");
499 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
500 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
503 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
504 &s->interrupt_callback, options)) < 0)
508 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
511 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
512 AVPacketList **plast_pktl){
513 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
518 (*plast_pktl)->next = pktl;
520 *packet_buffer = pktl;
522 /* add the packet in the buffered packet list */
528 void avformat_queue_attached_pictures(AVFormatContext *s)
531 for (i = 0; i < s->nb_streams; i++)
532 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
533 s->streams[i]->discard < AVDISCARD_ALL) {
534 AVPacket copy = s->streams[i]->attached_pic;
535 copy.destruct = NULL;
536 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
540 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
542 AVFormatContext *s = *ps;
544 AVDictionary *tmp = NULL;
545 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
547 if (!s && !(s = avformat_alloc_context()))
548 return AVERROR(ENOMEM);
550 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
551 return AVERROR(EINVAL);
557 av_dict_copy(&tmp, *options, 0);
559 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
562 if ((ret = init_input(s, filename, &tmp)) < 0)
564 avio_skip(s->pb, s->skip_initial_bytes);
566 /* check filename in case an image number is expected */
567 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
568 if (!av_filename_number_test(filename)) {
569 ret = AVERROR(EINVAL);
574 s->duration = s->start_time = AV_NOPTS_VALUE;
575 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
577 /* allocate private data */
578 if (s->iformat->priv_data_size > 0) {
579 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
580 ret = AVERROR(ENOMEM);
583 if (s->iformat->priv_class) {
584 *(const AVClass**)s->priv_data = s->iformat->priv_class;
585 av_opt_set_defaults(s->priv_data);
586 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
591 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
593 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
595 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
596 if ((ret = s->iformat->read_header(s)) < 0)
599 if (id3v2_extra_meta) {
600 if (!strcmp(s->iformat->name, "mp3")) {
601 if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
604 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
606 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
608 avformat_queue_attached_pictures(s);
610 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
611 s->data_offset = avio_tell(s->pb);
613 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
616 av_dict_free(options);
623 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
625 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
627 avformat_free_context(s);
632 /*******************************************************/
634 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
636 if(st->request_probe>0){
637 AVProbeData *pd = &st->probe_data;
639 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
643 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
647 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
648 pd->buf_size += pkt->size;
649 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
652 st->probe_packets = 0;
654 av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n",
659 end= s->raw_packet_buffer_remaining_size <= 0
660 || st->probe_packets<=0;
662 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
663 int score= set_codec_from_probe_data(s, st, pd);
664 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY)
668 st->request_probe= -1;
669 if(st->codec->codec_id != AV_CODEC_ID_NONE){
670 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
672 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
678 static void force_codec_ids(AVFormatContext *s, AVStream *st)
680 switch(st->codec->codec_type){
681 case AVMEDIA_TYPE_VIDEO:
682 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
684 case AVMEDIA_TYPE_AUDIO:
685 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
687 case AVMEDIA_TYPE_SUBTITLE:
688 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
693 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
699 AVPacketList *pktl = s->raw_packet_buffer;
703 st = s->streams[pkt->stream_index];
704 if(st->request_probe <= 0){
705 s->raw_packet_buffer = pktl->next;
706 s->raw_packet_buffer_remaining_size += pkt->size;
715 ret= s->iformat->read_packet(s, pkt);
717 if (!pktl || ret == AVERROR(EAGAIN))
719 for (i = 0; i < s->nb_streams; i++) {
721 if (st->probe_packets) {
722 probe_codec(s, st, NULL);
724 av_assert0(st->request_probe <= 0);
729 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
730 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
731 av_log(s, AV_LOG_WARNING,
732 "Dropped corrupted packet (stream = %d)\n",
738 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
739 av_packet_merge_side_data(pkt);
741 if(pkt->stream_index >= (unsigned)s->nb_streams){
742 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
746 st= s->streams[pkt->stream_index];
748 force_codec_ids(s, st);
750 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
751 if (s->use_wallclock_as_timestamps)
752 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
754 if(!pktl && st->request_probe <= 0)
757 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
758 s->raw_packet_buffer_remaining_size -= pkt->size;
760 probe_codec(s, st, pkt);
764 #if FF_API_READ_PACKET
765 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
767 return ff_read_packet(s, pkt);
772 /**********************************************************/
774 static int determinable_frame_size(AVCodecContext *avctx)
776 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
777 avctx->codec_id == AV_CODEC_ID_MP1 ||
778 avctx->codec_id == AV_CODEC_ID_MP2 ||
779 avctx->codec_id == AV_CODEC_ID_MP3/* ||
780 avctx->codec_id == AV_CODEC_ID_CELT*/)
786 * Get the number of samples of an audio frame. Return -1 on error.
788 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
792 /* give frame_size priority if demuxing */
793 if (!mux && enc->frame_size > 1)
794 return enc->frame_size;
796 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
799 /* fallback to using frame_size if muxing */
800 if (enc->frame_size > 1)
801 return enc->frame_size;
808 * Return the frame duration in seconds. Return 0 if not available.
810 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
811 AVCodecParserContext *pc, AVPacket *pkt)
817 switch(st->codec->codec_type) {
818 case AVMEDIA_TYPE_VIDEO:
819 if (st->r_frame_rate.num && !pc) {
820 *pnum = st->r_frame_rate.den;
821 *pden = st->r_frame_rate.num;
822 } else if(st->time_base.num*1000LL > st->time_base.den) {
823 *pnum = st->time_base.num;
824 *pden = st->time_base.den;
825 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
826 *pnum = st->codec->time_base.num;
827 *pden = st->codec->time_base.den;
828 if (pc && pc->repeat_pict) {
829 *pnum = (*pnum) * (1 + pc->repeat_pict);
831 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
832 //Thus if we have no parser in such case leave duration undefined.
833 if(st->codec->ticks_per_frame>1 && !pc){
838 case AVMEDIA_TYPE_AUDIO:
839 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
840 if (frame_size <= 0 || st->codec->sample_rate <= 0)
843 *pden = st->codec->sample_rate;
850 static int is_intra_only(AVCodecContext *enc){
851 const AVCodecDescriptor *desc;
853 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
856 desc = av_codec_get_codec_descriptor(enc);
858 desc = avcodec_descriptor_get(enc->codec_id);
859 av_codec_set_codec_descriptor(enc, desc);
862 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
866 static int has_decode_delay_been_guessed(AVStream *st)
868 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
869 if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy
871 #if CONFIG_H264_DECODER
872 if(st->codec->has_b_frames &&
873 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
876 if(st->codec->has_b_frames<3)
877 return st->nb_decoded_frames >= 7;
878 else if(st->codec->has_b_frames<4)
879 return st->nb_decoded_frames >= 18;
881 return st->nb_decoded_frames >= 20;
884 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
888 if (pktl == s->parse_queue_end)
889 return s->packet_buffer;
893 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
894 int64_t dts, int64_t pts)
896 AVStream *st= s->streams[stream_index];
897 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
898 int64_t pts_buffer[MAX_REORDER_DELAY+1];
902 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
905 delay = st->codec->has_b_frames;
906 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
908 shift = st->first_dts - RELATIVE_TS_BASE;
910 for (i=0; i<MAX_REORDER_DELAY+1; i++)
911 pts_buffer[i] = AV_NOPTS_VALUE;
913 if (is_relative(pts))
916 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
917 if(pktl->pkt.stream_index != stream_index)
919 if(is_relative(pktl->pkt.pts))
920 pktl->pkt.pts += shift;
922 if(is_relative(pktl->pkt.dts))
923 pktl->pkt.dts += shift;
925 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
926 st->start_time= pktl->pkt.pts;
928 if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
929 pts_buffer[0]= pktl->pkt.pts;
930 for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
931 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
932 if(pktl->pkt.dts == AV_NOPTS_VALUE)
933 pktl->pkt.dts= pts_buffer[0];
936 if (st->start_time == AV_NOPTS_VALUE)
937 st->start_time = pts;
940 static void update_initial_durations(AVFormatContext *s, AVStream *st,
941 int stream_index, int duration)
943 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
944 int64_t cur_dts= RELATIVE_TS_BASE;
946 if(st->first_dts != AV_NOPTS_VALUE){
947 cur_dts= st->first_dts;
948 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
949 if(pktl->pkt.stream_index == stream_index){
950 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
955 if(pktl && pktl->pkt.dts != st->first_dts) {
956 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));
960 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
963 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
964 st->first_dts = cur_dts;
965 }else if(st->cur_dts != RELATIVE_TS_BASE)
968 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
969 if(pktl->pkt.stream_index != stream_index)
971 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
972 && !pktl->pkt.duration){
973 pktl->pkt.dts= cur_dts;
974 if(!st->codec->has_b_frames)
975 pktl->pkt.pts= cur_dts;
976 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
977 pktl->pkt.duration = duration;
980 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
983 st->cur_dts= cur_dts;
986 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
987 AVCodecParserContext *pc, AVPacket *pkt)
989 int num, den, presentation_delayed, delay, i;
992 if (s->flags & AVFMT_FLAG_NOFILLIN)
995 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
996 pkt->dts= AV_NOPTS_VALUE;
998 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
999 //FIXME Set low_delay = 0 when has_b_frames = 1
1000 st->codec->has_b_frames = 1;
1002 /* do we have a video B-frame ? */
1003 delay= st->codec->has_b_frames;
1004 presentation_delayed = 0;
1006 /* XXX: need has_b_frame, but cannot get it if the codec is
1009 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1010 presentation_delayed = 1;
1012 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){
1013 if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
1014 pkt->dts -= 1LL<<st->pts_wrap_bits;
1016 pkt->pts += 1LL<<st->pts_wrap_bits;
1019 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1020 // we take the conservative approach and discard both
1021 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1022 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1023 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1024 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1025 pkt->dts= AV_NOPTS_VALUE;
1028 if (pkt->duration == 0) {
1029 ff_compute_frame_duration(&num, &den, st, pc, pkt);
1031 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1034 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1035 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1037 /* correct timestamps with byte offset if demuxers only have timestamps
1038 on packet boundaries */
1039 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1040 /* this will estimate bitrate based on this frame's duration and size */
1041 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1042 if(pkt->pts != AV_NOPTS_VALUE)
1044 if(pkt->dts != AV_NOPTS_VALUE)
1048 if (pc && pc->dts_sync_point >= 0) {
1049 // we have synchronization info from the parser
1050 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1052 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1053 if (pkt->dts != AV_NOPTS_VALUE) {
1054 // got DTS from the stream, update reference timestamp
1055 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1056 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1057 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1058 // compute DTS based on reference timestamp
1059 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1060 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1062 if (pc->dts_sync_point > 0)
1063 st->reference_dts = pkt->dts; // new reference
1067 /* This may be redundant, but it should not hurt. */
1068 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1069 presentation_delayed = 1;
1071 av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1072 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1073 /* interpolate PTS and DTS if they are not present */
1074 //We skip H264 currently because delay and has_b_frames are not reliably set
1075 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1076 if (presentation_delayed) {
1077 /* DTS = decompression timestamp */
1078 /* PTS = presentation timestamp */
1079 if (pkt->dts == AV_NOPTS_VALUE)
1080 pkt->dts = st->last_IP_pts;
1081 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1082 if (pkt->dts == AV_NOPTS_VALUE)
1083 pkt->dts = st->cur_dts;
1085 /* this is tricky: the dts must be incremented by the duration
1086 of the frame we are displaying, i.e. the last I- or P-frame */
1087 if (st->last_IP_duration == 0)
1088 st->last_IP_duration = pkt->duration;
1089 if(pkt->dts != AV_NOPTS_VALUE)
1090 st->cur_dts = pkt->dts + st->last_IP_duration;
1091 st->last_IP_duration = pkt->duration;
1092 st->last_IP_pts= pkt->pts;
1093 /* cannot compute PTS if not present (we can compute it only
1094 by knowing the future */
1095 } else if (pkt->pts != AV_NOPTS_VALUE ||
1096 pkt->dts != AV_NOPTS_VALUE ||
1098 int duration = pkt->duration;
1100 if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){
1101 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1102 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1103 if( old_diff < new_diff && old_diff < (duration>>3)
1104 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1105 && (!strcmp(s->iformat->name, "mpeg") ||
1106 !strcmp(s->iformat->name, "mpegts"))){
1107 pkt->pts += duration;
1108 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1109 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1110 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1114 /* presentation is not delayed : PTS and DTS are the same */
1115 if (pkt->pts == AV_NOPTS_VALUE)
1116 pkt->pts = pkt->dts;
1117 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1119 if (pkt->pts == AV_NOPTS_VALUE)
1120 pkt->pts = st->cur_dts;
1121 pkt->dts = pkt->pts;
1122 if (pkt->pts != AV_NOPTS_VALUE)
1123 st->cur_dts = pkt->pts + duration;
1127 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1128 st->pts_buffer[0]= pkt->pts;
1129 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1130 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1131 if(pkt->dts == AV_NOPTS_VALUE)
1132 pkt->dts= st->pts_buffer[0];
1134 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1135 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1137 if(pkt->dts > st->cur_dts)
1138 st->cur_dts = pkt->dts;
1140 av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1141 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1144 if (is_intra_only(st->codec))
1145 pkt->flags |= AV_PKT_FLAG_KEY;
1147 pkt->convergence_duration = pc->convergence_duration;
1150 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1153 AVPacketList *pktl = *pkt_buf;
1154 *pkt_buf = pktl->next;
1155 av_free_packet(&pktl->pkt);
1158 *pkt_buf_end = NULL;
1162 * Parse a packet, add all split parts to parse_queue
1164 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1166 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1168 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1169 AVStream *st = s->streams[stream_index];
1170 uint8_t *data = pkt ? pkt->data : NULL;
1171 int size = pkt ? pkt->size : 0;
1172 int ret = 0, got_output = 0;
1175 av_init_packet(&flush_pkt);
1178 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1179 // preserve 0-size sync packets
1180 compute_pkt_fields(s, st, st->parser, pkt);
1183 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1186 av_init_packet(&out_pkt);
1187 len = av_parser_parse2(st->parser, st->codec,
1188 &out_pkt.data, &out_pkt.size, data, size,
1189 pkt->pts, pkt->dts, pkt->pos);
1191 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1193 /* increment read pointer */
1197 got_output = !!out_pkt.size;
1202 /* set the duration */
1203 out_pkt.duration = 0;
1204 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1205 if (st->codec->sample_rate > 0) {
1206 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1207 (AVRational){ 1, st->codec->sample_rate },
1211 } else if (st->codec->time_base.num != 0 &&
1212 st->codec->time_base.den != 0) {
1213 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1214 st->codec->time_base,
1219 out_pkt.stream_index = st->index;
1220 out_pkt.pts = st->parser->pts;
1221 out_pkt.dts = st->parser->dts;
1222 out_pkt.pos = st->parser->pos;
1224 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1225 out_pkt.pos = st->parser->frame_offset;
1227 if (st->parser->key_frame == 1 ||
1228 (st->parser->key_frame == -1 &&
1229 st->parser->pict_type == AV_PICTURE_TYPE_I))
1230 out_pkt.flags |= AV_PKT_FLAG_KEY;
1232 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1233 out_pkt.flags |= AV_PKT_FLAG_KEY;
1235 compute_pkt_fields(s, st, st->parser, &out_pkt);
1237 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1238 out_pkt.destruct = pkt->destruct;
1239 pkt->destruct = NULL;
1241 if ((ret = av_dup_packet(&out_pkt)) < 0)
1244 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1245 av_free_packet(&out_pkt);
1246 ret = AVERROR(ENOMEM);
1252 /* end of the stream => close and free the parser */
1253 if (pkt == &flush_pkt) {
1254 av_parser_close(st->parser);
1259 av_free_packet(pkt);
1263 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1264 AVPacketList **pkt_buffer_end,
1268 av_assert0(*pkt_buffer);
1271 *pkt_buffer = pktl->next;
1273 *pkt_buffer_end = NULL;
1278 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1280 int ret = 0, i, got_packet = 0;
1282 av_init_packet(pkt);
1284 while (!got_packet && !s->parse_queue) {
1288 /* read next packet */
1289 ret = ff_read_packet(s, &cur_pkt);
1291 if (ret == AVERROR(EAGAIN))
1293 /* flush the parsers */
1294 for(i = 0; i < s->nb_streams; i++) {
1296 if (st->parser && st->need_parsing)
1297 parse_packet(s, NULL, st->index);
1299 /* all remaining packets are now in parse_queue =>
1300 * really terminate parsing */
1304 st = s->streams[cur_pkt.stream_index];
1306 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1307 cur_pkt.dts != AV_NOPTS_VALUE &&
1308 cur_pkt.pts < cur_pkt.dts) {
1309 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1310 cur_pkt.stream_index,
1311 av_ts2str(cur_pkt.pts),
1312 av_ts2str(cur_pkt.dts),
1315 if (s->debug & FF_FDEBUG_TS)
1316 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1317 cur_pkt.stream_index,
1318 av_ts2str(cur_pkt.pts),
1319 av_ts2str(cur_pkt.dts),
1324 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1325 st->parser = av_parser_init(st->codec->codec_id);
1327 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1328 "%s, packets or times may be invalid.\n",
1329 avcodec_get_name(st->codec->codec_id));
1330 /* no parser available: just output the raw packets */
1331 st->need_parsing = AVSTREAM_PARSE_NONE;
1332 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1333 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1334 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1335 st->parser->flags |= PARSER_FLAG_ONCE;
1336 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1337 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1341 if (!st->need_parsing || !st->parser) {
1342 /* no parsing needed: we just output the packet as is */
1344 compute_pkt_fields(s, st, NULL, pkt);
1345 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1346 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1347 ff_reduce_index(s, st->index);
1348 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1351 } else if (st->discard < AVDISCARD_ALL) {
1352 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1356 av_free_packet(&cur_pkt);
1358 if (pkt->flags & AV_PKT_FLAG_KEY)
1359 st->skip_to_keyframe = 0;
1360 if (st->skip_to_keyframe) {
1361 av_free_packet(&cur_pkt);
1366 if (!got_packet && s->parse_queue)
1367 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1369 if(s->debug & FF_FDEBUG_TS)
1370 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1372 av_ts2str(pkt->pts),
1373 av_ts2str(pkt->dts),
1381 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1383 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1389 ret = s->packet_buffer ?
1390 read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) :
1391 read_frame_internal(s, pkt);
1398 AVPacketList *pktl = s->packet_buffer;
1401 AVPacket *next_pkt = &pktl->pkt;
1403 if (next_pkt->dts != AV_NOPTS_VALUE) {
1404 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1405 // last dts seen for this stream. if any of packets following
1406 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1407 int64_t last_dts = next_pkt->dts;
1408 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1409 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1410 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1411 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1412 next_pkt->pts = pktl->pkt.dts;
1414 if (last_dts != AV_NOPTS_VALUE) {
1415 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1416 last_dts = pktl->pkt.dts;
1421 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1422 // Fixing the last reference frame had none pts issue (For MXF etc).
1423 // We only do this when
1425 // 2. we are not able to resolve a pts value for current packet.
1426 // 3. the packets for this stream at the end of the files had valid dts.
1427 next_pkt->pts = last_dts + next_pkt->duration;
1429 pktl = s->packet_buffer;
1432 /* read packet from packet buffer, if there is data */
1433 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1434 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1435 ret = read_from_packet_buffer(&s->packet_buffer,
1436 &s->packet_buffer_end, pkt);
1441 ret = read_frame_internal(s, pkt);
1443 if (pktl && ret != AVERROR(EAGAIN)) {
1450 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1451 &s->packet_buffer_end)) < 0)
1452 return AVERROR(ENOMEM);
1457 st = s->streams[pkt->stream_index];
1458 if (st->skip_samples) {
1459 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1460 AV_WL32(p, st->skip_samples);
1461 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1462 st->skip_samples = 0;
1465 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1466 ff_reduce_index(s, st->index);
1467 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1470 if (is_relative(pkt->dts))
1471 pkt->dts -= RELATIVE_TS_BASE;
1472 if (is_relative(pkt->pts))
1473 pkt->pts -= RELATIVE_TS_BASE;
1478 /* XXX: suppress the packet queue */
1479 static void flush_packet_queue(AVFormatContext *s)
1481 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1482 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1483 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1485 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1488 /*******************************************************/
1491 int av_find_default_stream_index(AVFormatContext *s)
1493 int first_audio_index = -1;
1497 if (s->nb_streams <= 0)
1499 for(i = 0; i < s->nb_streams; i++) {
1501 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1502 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1505 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1506 first_audio_index = i;
1508 return first_audio_index >= 0 ? first_audio_index : 0;
1512 * Flush the frame reader.
1514 void ff_read_frame_flush(AVFormatContext *s)
1519 flush_packet_queue(s);
1521 /* for each stream, reset read state */
1522 for(i = 0; i < s->nb_streams; i++) {
1526 av_parser_close(st->parser);
1529 st->last_IP_pts = AV_NOPTS_VALUE;
1530 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1531 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1532 st->reference_dts = AV_NOPTS_VALUE;
1534 st->probe_packets = MAX_PROBE_PACKETS;
1536 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1537 st->pts_buffer[j]= AV_NOPTS_VALUE;
1541 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1545 for(i = 0; i < s->nb_streams; i++) {
1546 AVStream *st = s->streams[i];
1548 st->cur_dts = av_rescale(timestamp,
1549 st->time_base.den * (int64_t)ref_st->time_base.num,
1550 st->time_base.num * (int64_t)ref_st->time_base.den);
1554 void ff_reduce_index(AVFormatContext *s, int stream_index)
1556 AVStream *st= s->streams[stream_index];
1557 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1559 if((unsigned)st->nb_index_entries >= max_entries){
1561 for(i=0; 2*i<st->nb_index_entries; i++)
1562 st->index_entries[i]= st->index_entries[2*i];
1563 st->nb_index_entries= i;
1567 int ff_add_index_entry(AVIndexEntry **index_entries,
1568 int *nb_index_entries,
1569 unsigned int *index_entries_allocated_size,
1570 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1572 AVIndexEntry *entries, *ie;
1575 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1578 if(timestamp == AV_NOPTS_VALUE)
1579 return AVERROR(EINVAL);
1581 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1582 timestamp -= RELATIVE_TS_BASE;
1584 entries = av_fast_realloc(*index_entries,
1585 index_entries_allocated_size,
1586 (*nb_index_entries + 1) *
1587 sizeof(AVIndexEntry));
1591 *index_entries= entries;
1593 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1596 index= (*nb_index_entries)++;
1597 ie= &entries[index];
1598 assert(index==0 || ie[-1].timestamp < timestamp);
1600 ie= &entries[index];
1601 if(ie->timestamp != timestamp){
1602 if(ie->timestamp <= timestamp)
1604 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1605 (*nb_index_entries)++;
1606 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1607 distance= ie->min_distance;
1611 ie->timestamp = timestamp;
1612 ie->min_distance= distance;
1619 int av_add_index_entry(AVStream *st,
1620 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1622 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1623 &st->index_entries_allocated_size, pos,
1624 timestamp, size, distance, flags);
1627 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1628 int64_t wanted_timestamp, int flags)
1636 //optimize appending index entries at the end
1637 if(b && entries[b-1].timestamp < wanted_timestamp)
1642 timestamp = entries[m].timestamp;
1643 if(timestamp >= wanted_timestamp)
1645 if(timestamp <= wanted_timestamp)
1648 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1650 if(!(flags & AVSEEK_FLAG_ANY)){
1651 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1652 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1661 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1664 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1665 wanted_timestamp, flags);
1668 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1670 AVInputFormat *avif= s->iformat;
1671 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1672 int64_t ts_min, ts_max, ts;
1677 if (stream_index < 0)
1680 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1683 ts_min= AV_NOPTS_VALUE;
1684 pos_limit= -1; //gcc falsely says it may be uninitialized
1686 st= s->streams[stream_index];
1687 if(st->index_entries){
1690 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()
1691 index= FFMAX(index, 0);
1692 e= &st->index_entries[index];
1694 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1696 ts_min= e->timestamp;
1697 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1698 pos_min, av_ts2str(ts_min));
1703 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1704 assert(index < st->nb_index_entries);
1706 e= &st->index_entries[index];
1707 assert(e->timestamp >= target_ts);
1709 ts_max= e->timestamp;
1710 pos_limit= pos_max - e->min_distance;
1711 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1712 pos_max, pos_limit, av_ts2str(ts_max));
1716 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1721 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1724 ff_read_frame_flush(s);
1725 ff_update_cur_dts(s, st, ts);
1730 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1731 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1732 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1733 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1736 int64_t start_pos, filesize;
1739 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1741 if(ts_min == AV_NOPTS_VALUE){
1742 pos_min = s->data_offset;
1743 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1744 if (ts_min == AV_NOPTS_VALUE)
1748 if(ts_min >= target_ts){
1753 if(ts_max == AV_NOPTS_VALUE){
1755 filesize = avio_size(s->pb);
1756 pos_max = filesize - 1;
1759 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1761 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1762 if (ts_max == AV_NOPTS_VALUE)
1766 int64_t tmp_pos= pos_max + 1;
1767 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1768 if(tmp_ts == AV_NOPTS_VALUE)
1772 if(tmp_pos >= filesize)
1778 if(ts_max <= target_ts){
1783 if(ts_min > ts_max){
1785 }else if(ts_min == ts_max){
1790 while (pos_min < pos_limit) {
1791 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1792 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1793 assert(pos_limit <= pos_max);
1796 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1797 // interpolate position (better than dichotomy)
1798 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1799 + pos_min - approximate_keyframe_distance;
1800 }else if(no_change==1){
1801 // bisection, if interpolation failed to change min or max pos last time
1802 pos = (pos_min + pos_limit)>>1;
1804 /* linear search if bisection failed, can only happen if there
1805 are very few or no keyframes between min/max */
1810 else if(pos > pos_limit)
1814 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1819 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1820 pos_min, pos, pos_max,
1821 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1822 pos_limit, start_pos, no_change);
1823 if(ts == AV_NOPTS_VALUE){
1824 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1827 assert(ts != AV_NOPTS_VALUE);
1828 if (target_ts <= ts) {
1829 pos_limit = start_pos - 1;
1833 if (target_ts >= ts) {
1839 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1840 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1843 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1845 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1846 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1847 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1853 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1854 int64_t pos_min, pos_max;
1856 pos_min = s->data_offset;
1857 pos_max = avio_size(s->pb) - 1;
1859 if (pos < pos_min) pos= pos_min;
1860 else if(pos > pos_max) pos= pos_max;
1862 avio_seek(s->pb, pos, SEEK_SET);
1867 static int seek_frame_generic(AVFormatContext *s,
1868 int stream_index, int64_t timestamp, int flags)
1875 st = s->streams[stream_index];
1877 index = av_index_search_timestamp(st, timestamp, flags);
1879 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1882 if(index < 0 || index==st->nb_index_entries-1){
1886 if(st->nb_index_entries){
1887 assert(st->index_entries);
1888 ie= &st->index_entries[st->nb_index_entries-1];
1889 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1891 ff_update_cur_dts(s, st, ie->timestamp);
1893 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1899 read_status = av_read_frame(s, &pkt);
1900 } while (read_status == AVERROR(EAGAIN));
1901 if (read_status < 0)
1903 av_free_packet(&pkt);
1904 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1905 if(pkt.flags & AV_PKT_FLAG_KEY)
1907 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1908 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);
1913 index = av_index_search_timestamp(st, timestamp, flags);
1918 ff_read_frame_flush(s);
1919 if (s->iformat->read_seek){
1920 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1923 ie = &st->index_entries[index];
1924 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1926 ff_update_cur_dts(s, st, ie->timestamp);
1931 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1932 int64_t timestamp, int flags)
1937 if (flags & AVSEEK_FLAG_BYTE) {
1938 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1940 ff_read_frame_flush(s);
1941 return seek_frame_byte(s, stream_index, timestamp, flags);
1944 if(stream_index < 0){
1945 stream_index= av_find_default_stream_index(s);
1946 if(stream_index < 0)
1949 st= s->streams[stream_index];
1950 /* timestamp for default must be expressed in AV_TIME_BASE units */
1951 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1954 /* first, we try the format specific seek */
1955 if (s->iformat->read_seek) {
1956 ff_read_frame_flush(s);
1957 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1964 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1965 ff_read_frame_flush(s);
1966 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1967 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1968 ff_read_frame_flush(s);
1969 return seek_frame_generic(s, stream_index, timestamp, flags);
1975 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1977 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1980 avformat_queue_attached_pictures(s);
1985 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1987 if(min_ts > ts || max_ts < ts)
1990 if (s->iformat->read_seek2) {
1992 ff_read_frame_flush(s);
1993 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1996 avformat_queue_attached_pictures(s);
2000 if(s->iformat->read_timestamp){
2001 //try to seek via read_timestamp()
2004 //Fallback to old API if new is not implemented but old is
2005 //Note the old has somewhat different semantics
2006 if (s->iformat->read_seek || 1) {
2007 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2008 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2009 if (ret<0 && ts != min_ts && max_ts != ts) {
2010 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2012 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2017 // try some generic seek like seek_frame_generic() but with new ts semantics
2020 /*******************************************************/
2023 * Return TRUE if the stream has accurate duration in any stream.
2025 * @return TRUE if the stream has accurate duration for at least one component.
2027 static int has_duration(AVFormatContext *ic)
2032 for(i = 0;i < ic->nb_streams; i++) {
2033 st = ic->streams[i];
2034 if (st->duration != AV_NOPTS_VALUE)
2037 if (ic->duration != AV_NOPTS_VALUE)
2043 * Estimate the stream timings from the one of each components.
2045 * Also computes the global bitrate if possible.
2047 static void update_stream_timings(AVFormatContext *ic)
2049 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2050 int64_t duration, duration1, filesize;
2055 start_time = INT64_MAX;
2056 start_time_text = INT64_MAX;
2057 end_time = INT64_MIN;
2058 duration = INT64_MIN;
2059 for(i = 0;i < ic->nb_streams; i++) {
2060 st = ic->streams[i];
2061 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2062 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2063 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2064 if (start_time1 < start_time_text)
2065 start_time_text = start_time1;
2067 start_time = FFMIN(start_time, start_time1);
2068 end_time1 = AV_NOPTS_VALUE;
2069 if (st->duration != AV_NOPTS_VALUE) {
2070 end_time1 = start_time1
2071 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2072 end_time = FFMAX(end_time, end_time1);
2074 for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){
2075 if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2076 p->start_time = start_time1;
2077 if(p->end_time < end_time1)
2078 p->end_time = end_time1;
2081 if (st->duration != AV_NOPTS_VALUE) {
2082 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2083 duration = FFMAX(duration, duration1);
2086 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2087 start_time = start_time_text;
2088 else if(start_time > start_time_text)
2089 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2091 if (start_time != INT64_MAX) {
2092 ic->start_time = start_time;
2093 if (end_time != INT64_MIN) {
2094 if (ic->nb_programs) {
2095 for (i=0; i<ic->nb_programs; i++) {
2096 p = ic->programs[i];
2097 if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2098 duration = FFMAX(duration, p->end_time - p->start_time);
2101 duration = FFMAX(duration, end_time - start_time);
2104 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2105 ic->duration = duration;
2107 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2108 /* compute the bitrate */
2109 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2110 (double)ic->duration;
2114 static void fill_all_stream_timings(AVFormatContext *ic)
2119 update_stream_timings(ic);
2120 for(i = 0;i < ic->nb_streams; i++) {
2121 st = ic->streams[i];
2122 if (st->start_time == AV_NOPTS_VALUE) {
2123 if(ic->start_time != AV_NOPTS_VALUE)
2124 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2125 if(ic->duration != AV_NOPTS_VALUE)
2126 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2131 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2133 int64_t filesize, duration;
2137 /* if bit_rate is already set, we believe it */
2138 if (ic->bit_rate <= 0) {
2140 for(i=0;i<ic->nb_streams;i++) {
2141 st = ic->streams[i];
2142 if (st->codec->bit_rate > 0)
2143 bit_rate += st->codec->bit_rate;
2145 ic->bit_rate = bit_rate;
2148 /* if duration is already set, we believe it */
2149 if (ic->duration == AV_NOPTS_VALUE &&
2150 ic->bit_rate != 0) {
2151 filesize = ic->pb ? avio_size(ic->pb) : 0;
2153 for(i = 0; i < ic->nb_streams; i++) {
2154 st = ic->streams[i];
2155 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2156 if (st->duration == AV_NOPTS_VALUE)
2157 st->duration = duration;
2163 #define DURATION_MAX_READ_SIZE 250000LL
2164 #define DURATION_MAX_RETRY 4
2166 /* only usable for MPEG-PS streams */
2167 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2169 AVPacket pkt1, *pkt = &pkt1;
2171 int read_size, i, ret;
2173 int64_t filesize, offset, duration;
2176 /* flush packet queue */
2177 flush_packet_queue(ic);
2179 for (i=0; i<ic->nb_streams; i++) {
2180 st = ic->streams[i];
2181 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2182 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2185 av_parser_close(st->parser);
2190 /* estimate the end time (duration) */
2191 /* XXX: may need to support wrapping */
2192 filesize = ic->pb ? avio_size(ic->pb) : 0;
2193 end_time = AV_NOPTS_VALUE;
2195 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2199 avio_seek(ic->pb, offset, SEEK_SET);
2202 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2206 ret = ff_read_packet(ic, pkt);
2207 } while(ret == AVERROR(EAGAIN));
2210 read_size += pkt->size;
2211 st = ic->streams[pkt->stream_index];
2212 if (pkt->pts != AV_NOPTS_VALUE &&
2213 (st->start_time != AV_NOPTS_VALUE ||
2214 st->first_dts != AV_NOPTS_VALUE)) {
2215 duration = end_time = pkt->pts;
2216 if (st->start_time != AV_NOPTS_VALUE)
2217 duration -= st->start_time;
2219 duration -= st->first_dts;
2221 duration += 1LL<<st->pts_wrap_bits;
2223 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2224 st->duration = duration;
2227 av_free_packet(pkt);
2229 }while( end_time==AV_NOPTS_VALUE
2230 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2231 && ++retry <= DURATION_MAX_RETRY);
2233 fill_all_stream_timings(ic);
2235 avio_seek(ic->pb, old_offset, SEEK_SET);
2236 for (i=0; i<ic->nb_streams; i++) {
2238 st->cur_dts= st->first_dts;
2239 st->last_IP_pts = AV_NOPTS_VALUE;
2240 st->reference_dts = AV_NOPTS_VALUE;
2244 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2248 /* get the file size, if possible */
2249 if (ic->iformat->flags & AVFMT_NOFILE) {
2252 file_size = avio_size(ic->pb);
2253 file_size = FFMAX(0, file_size);
2256 if ((!strcmp(ic->iformat->name, "mpeg") ||
2257 !strcmp(ic->iformat->name, "mpegts")) &&
2258 file_size && ic->pb->seekable) {
2259 /* get accurate estimate from the PTSes */
2260 estimate_timings_from_pts(ic, old_offset);
2261 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2262 } else if (has_duration(ic)) {
2263 /* at least one component has timings - we use them for all
2265 fill_all_stream_timings(ic);
2266 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2268 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2269 /* less precise: use bitrate info */
2270 estimate_timings_from_bit_rate(ic);
2271 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2273 update_stream_timings(ic);
2277 AVStream av_unused *st;
2278 for(i = 0;i < ic->nb_streams; i++) {
2279 st = ic->streams[i];
2280 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2281 (double) st->start_time / AV_TIME_BASE,
2282 (double) st->duration / AV_TIME_BASE);
2284 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2285 (double) ic->start_time / AV_TIME_BASE,
2286 (double) ic->duration / AV_TIME_BASE,
2287 ic->bit_rate / 1000);
2291 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2293 AVCodecContext *avctx = st->codec;
2295 #define FAIL(errmsg) do { \
2297 *errmsg_ptr = errmsg; \
2301 switch (avctx->codec_type) {
2302 case AVMEDIA_TYPE_AUDIO:
2303 if (!avctx->frame_size && determinable_frame_size(avctx))
2304 FAIL("unspecified frame size");
2305 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2306 FAIL("unspecified sample format");
2307 if (!avctx->sample_rate)
2308 FAIL("unspecified sample rate");
2309 if (!avctx->channels)
2310 FAIL("unspecified number of channels");
2311 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2312 FAIL("no decodable DTS frames");
2314 case AVMEDIA_TYPE_VIDEO:
2316 FAIL("unspecified size");
2317 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2318 FAIL("unspecified pixel format");
2320 case AVMEDIA_TYPE_SUBTITLE:
2321 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2322 FAIL("unspecified size");
2324 case AVMEDIA_TYPE_DATA:
2325 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2328 if (avctx->codec_id == AV_CODEC_ID_NONE)
2329 FAIL("unknown codec");
2333 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2334 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2336 const AVCodec *codec;
2337 int got_picture = 1, ret = 0;
2338 AVFrame *frame = avcodec_alloc_frame();
2339 AVSubtitle subtitle;
2340 AVPacket pkt = *avpkt;
2343 return AVERROR(ENOMEM);
2345 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2346 AVDictionary *thread_opt = NULL;
2348 codec = st->codec->codec ? st->codec->codec :
2349 avcodec_find_decoder(st->codec->codec_id);
2352 st->info->found_decoder = -1;
2357 /* force thread count to 1 since the h264 decoder will not extract SPS
2358 * and PPS to extradata during multi-threaded decoding */
2359 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2360 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2362 av_dict_free(&thread_opt);
2364 st->info->found_decoder = -1;
2367 st->info->found_decoder = 1;
2368 } else if (!st->info->found_decoder)
2369 st->info->found_decoder = 1;
2371 if (st->info->found_decoder < 0) {
2376 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2378 (!has_codec_parameters(st, NULL) ||
2379 !has_decode_delay_been_guessed(st) ||
2380 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2382 avcodec_get_frame_defaults(frame);
2383 switch(st->codec->codec_type) {
2384 case AVMEDIA_TYPE_VIDEO:
2385 ret = avcodec_decode_video2(st->codec, frame,
2386 &got_picture, &pkt);
2388 case AVMEDIA_TYPE_AUDIO:
2389 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2391 case AVMEDIA_TYPE_SUBTITLE:
2392 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2393 &got_picture, &pkt);
2401 st->nb_decoded_frames++;
2408 if(!pkt.data && !got_picture)
2412 avcodec_free_frame(&frame);
2416 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2418 while (tags->id != AV_CODEC_ID_NONE) {
2426 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2429 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2430 if(tag == tags[i].tag)
2433 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2434 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2437 return AV_CODEC_ID_NONE;
2440 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2443 for(i=0; tags && tags[i]; i++){
2444 int tag= ff_codec_get_tag(tags[i], id);
2450 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2453 for(i=0; tags && tags[i]; i++){
2454 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2455 if(id!=AV_CODEC_ID_NONE) return id;
2457 return AV_CODEC_ID_NONE;
2460 static void compute_chapters_end(AVFormatContext *s)
2463 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2465 for (i = 0; i < s->nb_chapters; i++)
2466 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2467 AVChapter *ch = s->chapters[i];
2468 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2471 for (j = 0; j < s->nb_chapters; j++) {
2472 AVChapter *ch1 = s->chapters[j];
2473 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2474 if (j != i && next_start > ch->start && next_start < end)
2477 ch->end = (end == INT64_MAX) ? ch->start : end;
2481 static int get_std_framerate(int i){
2482 if(i<60*12) return (i+1)*1001;
2483 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2487 * Is the time base unreliable.
2488 * This is a heuristic to balance between quick acceptance of the values in
2489 * the headers vs. some extra checks.
2490 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2491 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2492 * And there are "variable" fps files this needs to detect as well.
2494 static int tb_unreliable(AVCodecContext *c){
2495 if( c->time_base.den >= 101L*c->time_base.num
2496 || c->time_base.den < 5L*c->time_base.num
2497 /* || c->codec_tag == AV_RL32("DIVX")
2498 || c->codec_tag == AV_RL32("XVID")*/
2499 || c->codec_tag == AV_RL32("mp4v")
2500 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2501 || c->codec_id == AV_CODEC_ID_H264
2507 #if FF_API_FORMAT_PARAMETERS
2508 int av_find_stream_info(AVFormatContext *ic)
2510 return avformat_find_stream_info(ic, NULL);
2514 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2516 int i, count, ret, read_size, j;
2518 AVPacket pkt1, *pkt;
2519 int64_t old_offset = avio_tell(ic->pb);
2520 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2521 int flush_codecs = ic->probesize > 0;
2524 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2526 for(i=0;i<ic->nb_streams;i++) {
2527 const AVCodec *codec;
2528 AVDictionary *thread_opt = NULL;
2529 st = ic->streams[i];
2531 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2532 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2533 /* if(!st->time_base.num)
2535 if(!st->codec->time_base.num)
2536 st->codec->time_base= st->time_base;
2538 //only for the split stuff
2539 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2540 st->parser = av_parser_init(st->codec->codec_id);
2542 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2543 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2544 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2545 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2547 } else if (st->need_parsing) {
2548 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2549 "%s, packets or times may be invalid.\n",
2550 avcodec_get_name(st->codec->codec_id));
2553 codec = st->codec->codec ? st->codec->codec :
2554 avcodec_find_decoder(st->codec->codec_id);
2556 /* force thread count to 1 since the h264 decoder will not extract SPS
2557 * and PPS to extradata during multi-threaded decoding */
2558 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2560 /* Ensure that subtitle_header is properly set. */
2561 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2562 && codec && !st->codec->codec)
2563 avcodec_open2(st->codec, codec, options ? &options[i]
2566 //try to just open decoders, in case this is enough to get parameters
2567 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
2568 if (codec && !st->codec->codec)
2569 avcodec_open2(st->codec, codec, options ? &options[i]
2573 av_dict_free(&thread_opt);
2576 for (i=0; i<ic->nb_streams; i++) {
2577 #if FF_API_R_FRAME_RATE
2578 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2580 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2581 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2587 if (ff_check_interrupt(&ic->interrupt_callback)){
2589 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2593 /* check if one codec still needs to be handled */
2594 for(i=0;i<ic->nb_streams;i++) {
2595 int fps_analyze_framecount = 20;
2597 st = ic->streams[i];
2598 if (!has_codec_parameters(st, NULL))
2600 /* if the timebase is coarse (like the usual millisecond precision
2601 of mkv), we need to analyze more frames to reliably arrive at
2603 if (av_q2d(st->time_base) > 0.0005)
2604 fps_analyze_framecount *= 2;
2605 if (ic->fps_probe_size >= 0)
2606 fps_analyze_framecount = ic->fps_probe_size;
2607 /* variable fps and no guess at the real fps */
2608 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2609 && st->info->duration_count < fps_analyze_framecount
2610 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2612 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2614 if (st->first_dts == AV_NOPTS_VALUE &&
2615 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2616 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2619 if (i == ic->nb_streams) {
2620 /* NOTE: if the format has no header, then we need to read
2621 some packets to get most of the streams, so we cannot
2623 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2624 /* if we found the info for all the codecs, we can stop */
2626 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2631 /* we did not get all the codec info, but we read too much data */
2632 if (read_size >= ic->probesize) {
2634 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2635 for (i = 0; i < ic->nb_streams; i++)
2636 if (!ic->streams[i]->r_frame_rate.num &&
2637 ic->streams[i]->info->duration_count <= 1)
2638 av_log(ic, AV_LOG_WARNING,
2639 "Stream #%d: not enough frames to estimate rate; "
2640 "consider increasing probesize\n", i);
2644 /* NOTE: a new stream can be added there if no header in file
2645 (AVFMTCTX_NOHEADER) */
2646 ret = read_frame_internal(ic, &pkt1);
2647 if (ret == AVERROR(EAGAIN))
2655 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2658 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2659 &ic->packet_buffer_end);
2660 if ((ret = av_dup_packet(pkt)) < 0)
2661 goto find_stream_info_err;
2664 read_size += pkt->size;
2666 st = ic->streams[pkt->stream_index];
2667 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2668 /* check for non-increasing dts */
2669 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2670 st->info->fps_last_dts >= pkt->dts) {
2671 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2672 "packet %d with DTS %"PRId64", packet %d with DTS "
2673 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2674 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2675 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2677 /* check for a discontinuity in dts - if the difference in dts
2678 * is more than 1000 times the average packet duration in the sequence,
2679 * we treat it as a discontinuity */
2680 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2681 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2682 (pkt->dts - st->info->fps_last_dts) / 1000 >
2683 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2684 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2685 "packet %d with DTS %"PRId64", packet %d with DTS "
2686 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2687 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2688 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2691 /* update stored dts values */
2692 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2693 st->info->fps_first_dts = pkt->dts;
2694 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2696 st->info->fps_last_dts = pkt->dts;
2697 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2699 if (st->codec_info_nb_frames>1) {
2701 if (st->time_base.den > 0)
2702 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2703 if (st->avg_frame_rate.num > 0)
2704 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2706 if (t >= ic->max_analyze_duration) {
2707 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2710 if (pkt->duration) {
2711 st->info->codec_info_duration += pkt->duration;
2712 st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2;
2715 #if FF_API_R_FRAME_RATE
2717 int64_t last = st->info->last_dts;
2719 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2720 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2721 int64_t duration= pkt->dts - last;
2723 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2724 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2725 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2726 int framerate= get_std_framerate(i);
2727 double sdts= dts*framerate/(1001*12);
2729 int64_t ticks= llrint(sdts+j*0.5);
2730 double error= sdts - ticks + j*0.5;
2731 st->info->duration_error[j][0][i] += error;
2732 st->info->duration_error[j][1][i] += error*error;
2735 st->info->duration_count++;
2736 // ignore the first 4 values, they might have some random jitter
2737 if (st->info->duration_count > 3 && is_relative(pkt->dts) == is_relative(last))
2738 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2740 if (pkt->dts != AV_NOPTS_VALUE)
2741 st->info->last_dts = pkt->dts;
2744 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2745 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2746 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2747 st->codec->extradata_size= i;
2748 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2749 if (!st->codec->extradata)
2750 return AVERROR(ENOMEM);
2751 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2752 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2756 /* if still no information, we try to open the codec and to
2757 decompress the frame. We try to avoid that in most cases as
2758 it takes longer and uses more memory. For MPEG-4, we need to
2759 decompress for QuickTime.
2761 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2762 least one frame of codec data, this makes sure the codec initializes
2763 the channel configuration and does not only trust the values from the container.
2765 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2767 st->codec_info_nb_frames++;
2772 AVPacket empty_pkt = { 0 };
2774 av_init_packet(&empty_pkt);
2776 ret = -1; /* we could not have all the codec parameters before EOF */
2777 for(i=0;i<ic->nb_streams;i++) {
2780 st = ic->streams[i];
2782 /* flush the decoders */
2783 if (st->info->found_decoder == 1) {
2785 err = try_decode_frame(st, &empty_pkt,
2786 (options && i < orig_nb_streams) ?
2787 &options[i] : NULL);
2788 } while (err > 0 && !has_codec_parameters(st, NULL));
2791 av_log(ic, AV_LOG_INFO,
2792 "decoding for stream %d failed\n", st->index);
2796 if (!has_codec_parameters(st, &errmsg)) {
2798 avcodec_string(buf, sizeof(buf), st->codec, 0);
2799 av_log(ic, AV_LOG_WARNING,
2800 "Could not find codec parameters for stream %d (%s): %s\n"
2801 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2809 // close codecs which were opened in try_decode_frame()
2810 for(i=0;i<ic->nb_streams;i++) {
2811 st = ic->streams[i];
2812 avcodec_close(st->codec);
2814 for(i=0;i<ic->nb_streams;i++) {
2815 st = ic->streams[i];
2816 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2817 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2818 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2819 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2820 st->codec->codec_tag= tag;
2823 /* estimate average framerate if not set by demuxer */
2824 if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2826 double best_error = 0.01;
2828 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2829 st->info->codec_info_duration_fields*(int64_t)st->time_base.den,
2830 st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000);
2832 /* round guessed framerate to a "standard" framerate if it's
2833 * within 1% of the original estimate*/
2834 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2835 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2836 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2838 if (error < best_error) {
2840 best_fps = std_fps.num;
2844 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2845 best_fps, 12*1001, INT_MAX);
2848 // the check for tb_unreliable() is not completely correct, since this is not about handling
2849 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2850 // ipmovie.c produces.
2851 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)
2852 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);
2853 if (st->info->duration_count && !st->r_frame_rate.num
2854 && tb_unreliable(st->codec)) {
2856 double best_error= 0.01;
2858 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2861 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2863 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2866 int n= st->info->duration_count;
2867 double a= st->info->duration_error[k][0][j] / n;
2868 double error= st->info->duration_error[k][1][j]/n - a*a;
2870 if(error < best_error && best_error> 0.000000001){
2872 num = get_std_framerate(j);
2875 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2878 // do not increase frame rate by more than 1 % in order to match a standard rate.
2879 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2880 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2883 if (!st->r_frame_rate.num){
2884 if( st->codec->time_base.den * (int64_t)st->time_base.num
2885 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2886 st->r_frame_rate.num = st->codec->time_base.den;
2887 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2889 st->r_frame_rate.num = st->time_base.den;
2890 st->r_frame_rate.den = st->time_base.num;
2893 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2894 if(!st->codec->bits_per_coded_sample)
2895 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2896 // set stream disposition based on audio service type
2897 switch (st->codec->audio_service_type) {
2898 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2899 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2900 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2901 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2902 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2903 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2904 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2905 st->disposition = AV_DISPOSITION_COMMENT; break;
2906 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2907 st->disposition = AV_DISPOSITION_KARAOKE; break;
2913 estimate_timings(ic, old_offset);
2915 compute_chapters_end(ic);
2917 find_stream_info_err:
2918 for (i=0; i < ic->nb_streams; i++) {
2919 if (ic->streams[i]->codec)
2920 ic->streams[i]->codec->thread_count = 0;
2921 av_freep(&ic->streams[i]->info);
2924 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2928 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2932 for (i = 0; i < ic->nb_programs; i++) {
2933 if (ic->programs[i] == last) {
2937 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2938 if (ic->programs[i]->stream_index[j] == s)
2939 return ic->programs[i];
2945 int av_find_best_stream(AVFormatContext *ic,
2946 enum AVMediaType type,
2947 int wanted_stream_nb,
2949 AVCodec **decoder_ret,
2952 int i, nb_streams = ic->nb_streams;
2953 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
2954 unsigned *program = NULL;
2955 AVCodec *decoder = NULL, *best_decoder = NULL;
2957 if (related_stream >= 0 && wanted_stream_nb < 0) {
2958 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2960 program = p->stream_index;
2961 nb_streams = p->nb_stream_indexes;
2964 for (i = 0; i < nb_streams; i++) {
2965 int real_stream_index = program ? program[i] : i;
2966 AVStream *st = ic->streams[real_stream_index];
2967 AVCodecContext *avctx = st->codec;
2968 if (avctx->codec_type != type)
2970 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2972 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2975 decoder = avcodec_find_decoder(st->codec->codec_id);
2978 ret = AVERROR_DECODER_NOT_FOUND;
2982 count = st->codec_info_nb_frames;
2983 bitrate = avctx->bit_rate;
2984 multiframe = FFMIN(5, count);
2985 if ((best_multiframe > multiframe) ||
2986 (best_multiframe == multiframe && best_bitrate > bitrate) ||
2987 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
2990 best_bitrate = bitrate;
2991 best_multiframe = multiframe;
2992 ret = real_stream_index;
2993 best_decoder = decoder;
2994 if (program && i == nb_streams - 1 && ret < 0) {
2996 nb_streams = ic->nb_streams;
2997 i = 0; /* no related stream found, try again with everything */
3001 *decoder_ret = best_decoder;
3005 /*******************************************************/
3007 int av_read_play(AVFormatContext *s)
3009 if (s->iformat->read_play)
3010 return s->iformat->read_play(s);
3012 return avio_pause(s->pb, 0);
3013 return AVERROR(ENOSYS);
3016 int av_read_pause(AVFormatContext *s)
3018 if (s->iformat->read_pause)
3019 return s->iformat->read_pause(s);
3021 return avio_pause(s->pb, 1);
3022 return AVERROR(ENOSYS);
3025 void ff_free_stream(AVFormatContext *s, AVStream *st){
3026 av_assert0(s->nb_streams>0);
3027 av_assert0(s->streams[ s->nb_streams-1 ] == st);
3030 av_parser_close(st->parser);
3032 if (st->attached_pic.data)
3033 av_free_packet(&st->attached_pic);
3034 av_dict_free(&st->metadata);
3035 av_freep(&st->index_entries);
3036 av_freep(&st->codec->extradata);
3037 av_freep(&st->codec->subtitle_header);
3038 av_freep(&st->codec);
3039 av_freep(&st->priv_data);
3040 av_freep(&st->info);
3041 av_freep(&st->probe_data.buf);
3042 av_freep(&s->streams[ --s->nb_streams ]);
3045 void avformat_free_context(AVFormatContext *s)
3053 if (s->iformat && s->iformat->priv_class && s->priv_data)
3054 av_opt_free(s->priv_data);
3056 for(i=s->nb_streams-1; i>=0; i--) {
3057 ff_free_stream(s, s->streams[i]);
3059 for(i=s->nb_programs-1; i>=0; i--) {
3060 av_dict_free(&s->programs[i]->metadata);
3061 av_freep(&s->programs[i]->stream_index);
3062 av_freep(&s->programs[i]);
3064 av_freep(&s->programs);
3065 av_freep(&s->priv_data);
3066 while(s->nb_chapters--) {
3067 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3068 av_freep(&s->chapters[s->nb_chapters]);
3070 av_freep(&s->chapters);
3071 av_dict_free(&s->metadata);
3072 av_freep(&s->streams);
3076 #if FF_API_CLOSE_INPUT_FILE
3077 void av_close_input_file(AVFormatContext *s)
3079 avformat_close_input(&s);
3083 void avformat_close_input(AVFormatContext **ps)
3085 AVFormatContext *s = *ps;
3086 AVIOContext *pb = s->pb;
3088 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
3089 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3092 flush_packet_queue(s);
3095 if (s->iformat->read_close)
3096 s->iformat->read_close(s);
3099 avformat_free_context(s);
3106 #if FF_API_NEW_STREAM
3107 AVStream *av_new_stream(AVFormatContext *s, int id)
3109 AVStream *st = avformat_new_stream(s, NULL);
3116 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3122 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3124 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3127 s->streams = streams;
3129 st = av_mallocz(sizeof(AVStream));
3132 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3136 st->info->last_dts = AV_NOPTS_VALUE;
3138 st->codec = avcodec_alloc_context3(c);
3140 /* no default bitrate if decoding */
3141 st->codec->bit_rate = 0;
3143 st->index = s->nb_streams;
3144 st->start_time = AV_NOPTS_VALUE;
3145 st->duration = AV_NOPTS_VALUE;
3146 /* we set the current DTS to 0 so that formats without any timestamps
3147 but durations get some timestamps, formats with some unknown
3148 timestamps have their first few packets buffered and the
3149 timestamps corrected before they are returned to the user */
3150 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3151 st->first_dts = AV_NOPTS_VALUE;
3152 st->probe_packets = MAX_PROBE_PACKETS;
3154 /* default pts setting is MPEG-like */
3155 avpriv_set_pts_info(st, 33, 1, 90000);
3156 st->last_IP_pts = AV_NOPTS_VALUE;
3157 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3158 st->pts_buffer[i]= AV_NOPTS_VALUE;
3159 st->reference_dts = AV_NOPTS_VALUE;
3161 st->sample_aspect_ratio = (AVRational){0,1};
3163 #if FF_API_R_FRAME_RATE
3164 st->info->last_dts = AV_NOPTS_VALUE;
3166 st->info->fps_first_dts = AV_NOPTS_VALUE;
3167 st->info->fps_last_dts = AV_NOPTS_VALUE;
3169 s->streams[s->nb_streams++] = st;
3173 AVProgram *av_new_program(AVFormatContext *ac, int id)
3175 AVProgram *program=NULL;
3178 av_dlog(ac, "new_program: id=0x%04x\n", id);
3180 for(i=0; i<ac->nb_programs; i++)
3181 if(ac->programs[i]->id == id)
3182 program = ac->programs[i];
3185 program = av_mallocz(sizeof(AVProgram));
3188 dynarray_add(&ac->programs, &ac->nb_programs, program);
3189 program->discard = AVDISCARD_NONE;
3193 program->start_time =
3194 program->end_time = AV_NOPTS_VALUE;
3199 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3201 AVChapter *chapter = NULL;
3204 for(i=0; i<s->nb_chapters; i++)
3205 if(s->chapters[i]->id == id)
3206 chapter = s->chapters[i];
3209 chapter= av_mallocz(sizeof(AVChapter));
3212 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3214 av_dict_set(&chapter->metadata, "title", title, 0);
3216 chapter->time_base= time_base;
3217 chapter->start = start;
3223 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3226 AVProgram *program=NULL;
3229 if (idx >= ac->nb_streams) {
3230 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3234 for(i=0; i<ac->nb_programs; i++){
3235 if(ac->programs[i]->id != progid)
3237 program = ac->programs[i];
3238 for(j=0; j<program->nb_stream_indexes; j++)
3239 if(program->stream_index[j] == idx)
3242 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3245 program->stream_index = tmp;
3246 program->stream_index[program->nb_stream_indexes++] = idx;
3251 static void print_fps(double d, const char *postfix){
3252 uint64_t v= lrintf(d*100);
3253 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3254 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3255 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3258 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3260 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3261 AVDictionaryEntry *tag=NULL;
3263 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3264 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3265 if(strcmp("language", tag->key)){
3266 const char *p = tag->value;
3267 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3270 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3271 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3272 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3274 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3275 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3278 av_log(ctx, AV_LOG_INFO, "\n");
3284 /* "user interface" functions */
3285 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3288 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3289 AVStream *st = ic->streams[i];
3290 int g = av_gcd(st->time_base.num, st->time_base.den);
3291 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3292 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3293 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3294 /* the pid is an important information, so we display it */
3295 /* XXX: add a generic system */
3296 if (flags & AVFMT_SHOW_IDS)
3297 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3299 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3300 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3301 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3302 if (st->sample_aspect_ratio.num && // default
3303 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3304 AVRational display_aspect_ratio;
3305 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3306 st->codec->width*st->sample_aspect_ratio.num,
3307 st->codec->height*st->sample_aspect_ratio.den,
3309 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3310 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3311 display_aspect_ratio.num, display_aspect_ratio.den);
3313 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3314 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3315 print_fps(av_q2d(st->avg_frame_rate), "fps");
3316 #if FF_API_R_FRAME_RATE
3317 if(st->r_frame_rate.den && st->r_frame_rate.num)
3318 print_fps(av_q2d(st->r_frame_rate), "tbr");
3320 if(st->time_base.den && st->time_base.num)
3321 print_fps(1/av_q2d(st->time_base), "tbn");
3322 if(st->codec->time_base.den && st->codec->time_base.num)
3323 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3325 if (st->disposition & AV_DISPOSITION_DEFAULT)
3326 av_log(NULL, AV_LOG_INFO, " (default)");
3327 if (st->disposition & AV_DISPOSITION_DUB)
3328 av_log(NULL, AV_LOG_INFO, " (dub)");
3329 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3330 av_log(NULL, AV_LOG_INFO, " (original)");
3331 if (st->disposition & AV_DISPOSITION_COMMENT)
3332 av_log(NULL, AV_LOG_INFO, " (comment)");
3333 if (st->disposition & AV_DISPOSITION_LYRICS)
3334 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3335 if (st->disposition & AV_DISPOSITION_KARAOKE)
3336 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3337 if (st->disposition & AV_DISPOSITION_FORCED)
3338 av_log(NULL, AV_LOG_INFO, " (forced)");
3339 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3340 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3341 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3342 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3343 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3344 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3345 av_log(NULL, AV_LOG_INFO, "\n");
3346 dump_metadata(NULL, st->metadata, " ");
3349 void av_dump_format(AVFormatContext *ic,
3355 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3356 if (ic->nb_streams && !printed)
3359 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3360 is_output ? "Output" : "Input",
3362 is_output ? ic->oformat->name : ic->iformat->name,
3363 is_output ? "to" : "from", url);
3364 dump_metadata(NULL, ic->metadata, " ");
3366 av_log(NULL, AV_LOG_INFO, " Duration: ");
3367 if (ic->duration != AV_NOPTS_VALUE) {
3368 int hours, mins, secs, us;
3369 int64_t duration = ic->duration + 5000;
3370 secs = duration / AV_TIME_BASE;
3371 us = duration % AV_TIME_BASE;
3376 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3377 (100 * us) / AV_TIME_BASE);
3379 av_log(NULL, AV_LOG_INFO, "N/A");
3381 if (ic->start_time != AV_NOPTS_VALUE) {
3383 av_log(NULL, AV_LOG_INFO, ", start: ");
3384 secs = ic->start_time / AV_TIME_BASE;
3385 us = abs(ic->start_time % AV_TIME_BASE);
3386 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3387 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3389 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3391 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3393 av_log(NULL, AV_LOG_INFO, "N/A");
3395 av_log(NULL, AV_LOG_INFO, "\n");
3397 for (i = 0; i < ic->nb_chapters; i++) {
3398 AVChapter *ch = ic->chapters[i];
3399 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3400 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3401 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3403 dump_metadata(NULL, ch->metadata, " ");
3405 if(ic->nb_programs) {
3406 int j, k, total = 0;
3407 for(j=0; j<ic->nb_programs; j++) {
3408 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3410 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3411 name ? name->value : "");
3412 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3413 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3414 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3415 printed[ic->programs[j]->stream_index[k]] = 1;
3417 total += ic->programs[j]->nb_stream_indexes;
3419 if (total < ic->nb_streams)
3420 av_log(NULL, AV_LOG_INFO, " No Program\n");
3422 for(i=0;i<ic->nb_streams;i++)
3424 dump_stream_format(ic, i, index, is_output);
3429 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3430 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3432 return av_gettime();
3436 uint64_t ff_ntp_time(void)
3438 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3441 int av_get_frame_filename(char *buf, int buf_size,
3442 const char *path, int number)
3445 char *q, buf1[20], c;
3446 int nd, len, percentd_found;
3458 while (isdigit(*p)) {
3459 nd = nd * 10 + *p++ - '0';
3462 } while (isdigit(c));
3471 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3473 if ((q - buf + len) > buf_size - 1)
3475 memcpy(q, buf1, len);
3483 if ((q - buf) < buf_size - 1)
3487 if (!percentd_found)
3496 static void hex_dump_internal(void *avcl, FILE *f, int level,
3497 const uint8_t *buf, int size)
3501 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3503 for(i=0;i<size;i+=16) {
3510 PRINT(" %02x", buf[i+j]);
3515 for(j=0;j<len;j++) {
3517 if (c < ' ' || c > '~')
3526 void av_hex_dump(FILE *f, const uint8_t *buf, int size)
3528 hex_dump_internal(NULL, f, 0, buf, size);
3531 void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size)
3533 hex_dump_internal(avcl, NULL, level, buf, size);
3536 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3539 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3540 PRINT("stream #%d:\n", pkt->stream_index);
3541 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3542 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3543 /* DTS is _always_ valid after av_read_frame() */
3545 if (pkt->dts == AV_NOPTS_VALUE)
3548 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3549 /* PTS may not be known if B-frames are present. */
3551 if (pkt->pts == AV_NOPTS_VALUE)
3554 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3556 PRINT(" size=%d\n", pkt->size);
3559 av_hex_dump(f, pkt->data, pkt->size);
3563 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3565 AVRational tb = { 1, AV_TIME_BASE };
3566 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3570 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3572 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3576 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3578 AVRational tb = { 1, AV_TIME_BASE };
3579 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3583 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3586 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3589 void av_url_split(char *proto, int proto_size,
3590 char *authorization, int authorization_size,
3591 char *hostname, int hostname_size,
3593 char *path, int path_size,
3596 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
3598 if (port_ptr) *port_ptr = -1;
3599 if (proto_size > 0) proto[0] = 0;
3600 if (authorization_size > 0) authorization[0] = 0;
3601 if (hostname_size > 0) hostname[0] = 0;
3602 if (path_size > 0) path[0] = 0;
3604 /* parse protocol */
3605 if ((p = strchr(url, ':'))) {
3606 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3611 /* no protocol means plain filename */
3612 av_strlcpy(path, url, path_size);
3616 /* separate path from hostname */
3617 ls = strchr(p, '/');
3618 ls2 = strchr(p, '?');
3622 ls = FFMIN(ls, ls2);
3624 av_strlcpy(path, ls, path_size);
3626 ls = &p[strlen(p)]; // XXX
3628 /* the rest is hostname, use that to parse auth/port */
3630 /* authorization (user[:pass]@hostname) */
3632 while ((at = strchr(p, '@')) && at < ls) {
3633 av_strlcpy(authorization, at2,
3634 FFMIN(authorization_size, at + 1 - at2));
3635 p = at + 1; /* skip '@' */
3638 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3640 av_strlcpy(hostname, p + 1,
3641 FFMIN(hostname_size, brk - p));
3642 if (brk[1] == ':' && port_ptr)
3643 *port_ptr = atoi(brk + 2);
3644 } else if ((col = strchr(p, ':')) && col < ls) {
3645 av_strlcpy(hostname, p,
3646 FFMIN(col + 1 - p, hostname_size));
3647 if (port_ptr) *port_ptr = atoi(col + 1);
3649 av_strlcpy(hostname, p,
3650 FFMIN(ls + 1 - p, hostname_size));
3654 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3657 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3660 'C', 'D', 'E', 'F' };
3661 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3664 'c', 'd', 'e', 'f' };
3665 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3667 for(i = 0; i < s; i++) {
3668 buff[i * 2] = hex_table[src[i] >> 4];
3669 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3675 int ff_hex_to_data(uint8_t *data, const char *p)
3682 p += strspn(p, SPACE_CHARS);
3685 c = toupper((unsigned char) *p++);
3686 if (c >= '0' && c <= '9')
3688 else if (c >= 'A' && c <= 'F')
3703 #if FF_API_SET_PTS_INFO
3704 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3705 unsigned int pts_num, unsigned int pts_den)
3707 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3711 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3712 unsigned int pts_num, unsigned int pts_den)
3715 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3716 if(new_tb.num != pts_num)
3717 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3719 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3721 if(new_tb.num <= 0 || new_tb.den <= 0) {
3722 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);
3725 s->time_base = new_tb;
3726 av_codec_set_pkt_timebase(s->codec, new_tb);
3727 s->pts_wrap_bits = pts_wrap_bits;
3730 int ff_url_join(char *str, int size, const char *proto,
3731 const char *authorization, const char *hostname,
3732 int port, const char *fmt, ...)
3735 struct addrinfo hints = { 0 }, *ai;
3740 av_strlcatf(str, size, "%s://", proto);
3741 if (authorization && authorization[0])
3742 av_strlcatf(str, size, "%s@", authorization);
3743 #if CONFIG_NETWORK && defined(AF_INET6)
3744 /* Determine if hostname is a numerical IPv6 address,
3745 * properly escape it within [] in that case. */
3746 hints.ai_flags = AI_NUMERICHOST;
3747 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3748 if (ai->ai_family == AF_INET6) {
3749 av_strlcat(str, "[", size);
3750 av_strlcat(str, hostname, size);
3751 av_strlcat(str, "]", size);
3753 av_strlcat(str, hostname, size);
3758 /* Not an IPv6 address, just output the plain string. */
3759 av_strlcat(str, hostname, size);
3762 av_strlcatf(str, size, ":%d", port);
3765 int len = strlen(str);
3768 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3774 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3775 AVFormatContext *src)
3780 local_pkt.stream_index = dst_stream;
3781 if (pkt->pts != AV_NOPTS_VALUE)
3782 local_pkt.pts = av_rescale_q(pkt->pts,
3783 src->streams[pkt->stream_index]->time_base,
3784 dst->streams[dst_stream]->time_base);
3785 if (pkt->dts != AV_NOPTS_VALUE)
3786 local_pkt.dts = av_rescale_q(pkt->dts,
3787 src->streams[pkt->stream_index]->time_base,
3788 dst->streams[dst_stream]->time_base);
3789 return av_write_frame(dst, &local_pkt);
3792 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3795 const char *ptr = str;
3797 /* Parse key=value pairs. */
3800 char *dest = NULL, *dest_end;
3801 int key_len, dest_len = 0;
3803 /* Skip whitespace and potential commas. */
3804 while (*ptr && (isspace(*ptr) || *ptr == ','))
3811 if (!(ptr = strchr(key, '=')))
3814 key_len = ptr - key;
3816 callback_get_buf(context, key, key_len, &dest, &dest_len);
3817 dest_end = dest + dest_len - 1;
3821 while (*ptr && *ptr != '\"') {
3825 if (dest && dest < dest_end)
3829 if (dest && dest < dest_end)
3837 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3838 if (dest && dest < dest_end)
3846 int ff_find_stream_index(AVFormatContext *s, int id)
3849 for (i = 0; i < s->nb_streams; i++) {
3850 if (s->streams[i]->id == id)
3856 void ff_make_absolute_url(char *buf, int size, const char *base,
3859 char *sep, *path_query;
3860 /* Absolute path, relative to the current server */
3861 if (base && strstr(base, "://") && rel[0] == '/') {
3863 av_strlcpy(buf, base, size);
3864 sep = strstr(buf, "://");
3866 /* Take scheme from base url */
3867 if (rel[1] == '/') {
3870 /* Take scheme and host from base url */
3872 sep = strchr(sep, '/');
3877 av_strlcat(buf, rel, size);
3880 /* If rel actually is an absolute url, just copy it */
3881 if (!base || strstr(rel, "://") || rel[0] == '/') {
3882 av_strlcpy(buf, rel, size);
3886 av_strlcpy(buf, base, size);
3888 /* Strip off any query string from base */
3889 path_query = strchr(buf, '?');
3890 if (path_query != NULL)
3893 /* Is relative path just a new query part? */
3894 if (rel[0] == '?') {
3895 av_strlcat(buf, rel, size);
3899 /* Remove the file name from the base url */
3900 sep = strrchr(buf, '/');
3905 while (av_strstart(rel, "../", NULL) && sep) {
3906 /* Remove the path delimiter at the end */
3908 sep = strrchr(buf, '/');
3909 /* If the next directory name to pop off is "..", break here */
3910 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3911 /* Readd the slash we just removed */
3912 av_strlcat(buf, "/", size);
3915 /* Cut off the directory name */
3922 av_strlcat(buf, rel, size);
3925 int64_t ff_iso8601_to_unix_time(const char *datestr)
3927 struct tm time1 = {0}, time2 = {0};
3929 ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1);
3930 ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2);
3932 return av_timegm(&time2);
3934 return av_timegm(&time1);
3937 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
3940 if (ofmt->query_codec)
3941 return ofmt->query_codec(codec_id, std_compliance);
3942 else if (ofmt->codec_tag)
3943 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3944 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3945 codec_id == ofmt->subtitle_codec)
3948 return AVERROR_PATCHWELCOME;
3951 int avformat_network_init(void)
3955 ff_network_inited_globally = 1;
3956 if ((ret = ff_network_init()) < 0)
3963 int avformat_network_deinit(void)
3972 int ff_add_param_change(AVPacket *pkt, int32_t channels,
3973 uint64_t channel_layout, int32_t sample_rate,
3974 int32_t width, int32_t height)
3980 return AVERROR(EINVAL);
3983 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
3985 if (channel_layout) {
3987 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
3991 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
3993 if (width || height) {
3995 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
3997 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
3999 return AVERROR(ENOMEM);
4000 bytestream_put_le32(&data, flags);
4002 bytestream_put_le32(&data, channels);
4004 bytestream_put_le64(&data, channel_layout);
4006 bytestream_put_le32(&data, sample_rate);
4007 if (width || height) {
4008 bytestream_put_le32(&data, width);
4009 bytestream_put_le32(&data, height);
4014 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4016 return ff_codec_bmp_tags;
4018 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4020 return ff_codec_wav_tags;
4023 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4025 AVRational undef = {0, 1};
4026 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4027 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4028 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4030 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4031 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4032 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4033 stream_sample_aspect_ratio = undef;
4035 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4036 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4037 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4038 frame_sample_aspect_ratio = undef;
4040 if (stream_sample_aspect_ratio.num)
4041 return stream_sample_aspect_ratio;
4043 return frame_sample_aspect_ratio;
4046 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4049 if (*spec <= '9' && *spec >= '0') /* opt:index */
4050 return strtol(spec, NULL, 0) == st->index;
4051 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4052 *spec == 't') { /* opt:[vasdt] */
4053 enum AVMediaType type;
4056 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4057 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4058 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4059 case 'd': type = AVMEDIA_TYPE_DATA; break;
4060 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4061 default: av_assert0(0);
4063 if (type != st->codec->codec_type)
4065 if (*spec++ == ':') { /* possibly followed by :index */
4066 int i, index = strtol(spec, NULL, 0);
4067 for (i = 0; i < s->nb_streams; i++)
4068 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4069 return i == st->index;
4073 } else if (*spec == 'p' && *(spec + 1) == ':') {
4077 prog_id = strtol(spec, &endptr, 0);
4078 for (i = 0; i < s->nb_programs; i++) {
4079 if (s->programs[i]->id != prog_id)
4082 if (*endptr++ == ':') {
4083 int stream_idx = strtol(endptr, NULL, 0);
4084 return stream_idx >= 0 &&
4085 stream_idx < s->programs[i]->nb_stream_indexes &&
4086 st->index == s->programs[i]->stream_index[stream_idx];
4089 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4090 if (st->index == s->programs[i]->stream_index[j])
4094 } else if (*spec == '#') {
4097 sid = strtol(spec + 1, &endptr, 0);
4099 return st->id == sid;
4100 } else if (!*spec) /* empty specifier, matches everything */
4103 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4104 return AVERROR(EINVAL);