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 /* fraction handling */
84 * f = val + (num / den) + 0.5.
86 * 'num' is normalized so that it is such as 0 <= num < den.
88 * @param f fractional number
89 * @param val integer value
90 * @param num must be >= 0
91 * @param den must be >= 1
93 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
106 * Fractional addition to f: f = f + (incr / f->den).
108 * @param f fractional number
109 * @param incr increment, can be positive or negative
111 static void frac_add(AVFrac *f, int64_t incr)
124 } else if (num >= den) {
131 /** head of registered input format linked list */
132 static AVInputFormat *first_iformat = NULL;
133 /** head of registered output format linked list */
134 static AVOutputFormat *first_oformat = NULL;
136 AVInputFormat *av_iformat_next(AVInputFormat *f)
138 if(f) return f->next;
139 else return first_iformat;
142 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
144 if(f) return f->next;
145 else return first_oformat;
148 void av_register_input_format(AVInputFormat *format)
152 while (*p != NULL) p = &(*p)->next;
157 void av_register_output_format(AVOutputFormat *format)
161 while (*p != NULL) p = &(*p)->next;
166 int av_match_ext(const char *filename, const char *extensions)
174 ext = strrchr(filename, '.');
180 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
183 if (!av_strcasecmp(ext1, ext))
193 static int match_format(const char *name, const char *names)
201 namelen = strlen(name);
202 while ((p = strchr(names, ','))) {
203 len = FFMAX(p - names, namelen);
204 if (!av_strncasecmp(name, names, len))
208 return !av_strcasecmp(name, names);
211 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
212 const char *mime_type)
214 AVOutputFormat *fmt = NULL, *fmt_found;
215 int score_max, score;
217 /* specific test for image sequences */
218 #if CONFIG_IMAGE2_MUXER
219 if (!short_name && filename &&
220 av_filename_number_test(filename) &&
221 ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) {
222 return av_guess_format("image2", NULL, NULL);
225 /* Find the proper file type. */
228 while ((fmt = av_oformat_next(fmt))) {
230 if (fmt->name && short_name && match_format(short_name, fmt->name))
232 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
234 if (filename && fmt->extensions &&
235 av_match_ext(filename, fmt->extensions)) {
238 if (score > score_max) {
246 enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
247 const char *filename, const char *mime_type, enum AVMediaType type){
248 if(type == AVMEDIA_TYPE_VIDEO){
249 enum AVCodecID codec_id= AV_CODEC_ID_NONE;
251 #if CONFIG_IMAGE2_MUXER
252 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
253 codec_id= ff_guess_image2_codec(filename);
256 if(codec_id == AV_CODEC_ID_NONE)
257 codec_id= fmt->video_codec;
259 }else if(type == AVMEDIA_TYPE_AUDIO)
260 return fmt->audio_codec;
261 else if (type == AVMEDIA_TYPE_SUBTITLE)
262 return fmt->subtitle_codec;
264 return AV_CODEC_ID_NONE;
267 AVInputFormat *av_find_input_format(const char *short_name)
269 AVInputFormat *fmt = NULL;
270 while ((fmt = av_iformat_next(fmt))) {
271 if (match_format(short_name, fmt->name))
277 int ffio_limit(AVIOContext *s, int size)
280 int64_t remaining= s->maxsize - avio_tell(s);
281 if(remaining < size){
282 int64_t newsize= avio_size(s);
283 if(!s->maxsize || s->maxsize<newsize)
284 s->maxsize= newsize - !newsize;
285 remaining= s->maxsize - avio_tell(s);
286 remaining= FFMAX(remaining, 0);
289 if(s->maxsize>=0 && remaining+1 < size){
290 av_log(0, AV_LOG_ERROR, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
297 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
300 int orig_size = size;
301 size= ffio_limit(s, size);
303 ret= av_new_packet(pkt, size);
308 pkt->pos= avio_tell(s);
310 ret= avio_read(s, pkt->data, size);
314 av_shrink_packet(pkt, ret);
315 if (pkt->size < orig_size)
316 pkt->flags |= AV_PKT_FLAG_CORRUPT;
321 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
326 return av_get_packet(s, pkt, size);
327 old_size = pkt->size;
328 ret = av_grow_packet(pkt, size);
331 ret = avio_read(s, pkt->data + old_size, size);
332 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
337 int av_filename_number_test(const char *filename)
340 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
343 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
345 AVProbeData lpd = *pd;
346 AVInputFormat *fmt1 = NULL, *fmt;
347 int score, nodat = 0, score_max=0;
349 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
350 int id3len = ff_id3v2_tag_len(lpd.buf);
351 if (lpd.buf_size > id3len + 16) {
353 lpd.buf_size -= id3len;
359 while ((fmt1 = av_iformat_next(fmt1))) {
360 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
363 if (fmt1->read_probe) {
364 score = fmt1->read_probe(&lpd);
365 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
366 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
367 } else if (fmt1->extensions) {
368 if (av_match_ext(lpd.filename, fmt1->extensions)) {
372 if (score > score_max) {
375 }else if (score == score_max)
378 *score_ret= score_max;
383 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
386 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
387 if(score_ret > *score_max){
388 *score_max= score_ret;
394 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
396 return av_probe_input_format2(pd, is_opened, &score);
399 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
401 static const struct {
402 const char *name; enum AVCodecID id; enum AVMediaType type;
404 { "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
405 { "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
406 { "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
407 { "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
408 { "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
409 { "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
410 { "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
411 { "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
412 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
416 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
420 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
421 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
422 for (i = 0; fmt_id_type[i].name; i++) {
423 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
424 st->codec->codec_id = fmt_id_type[i].id;
425 st->codec->codec_type = fmt_id_type[i].type;
433 /************************************************************/
434 /* input media file */
436 int av_demuxer_open(AVFormatContext *ic){
439 if (ic->iformat->read_header) {
440 err = ic->iformat->read_header(ic);
445 if (ic->pb && !ic->data_offset)
446 ic->data_offset = avio_tell(ic->pb);
452 /** size of probe buffer, for guessing file type from file contents */
453 #define PROBE_BUF_MIN 2048
454 #define PROBE_BUF_MAX (1<<20)
456 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
457 const char *filename, void *logctx,
458 unsigned int offset, unsigned int max_probe_size)
460 AVProbeData pd = { filename ? filename : "", NULL, -offset };
461 unsigned char *buf = NULL;
462 int ret = 0, probe_size;
464 if (!max_probe_size) {
465 max_probe_size = PROBE_BUF_MAX;
466 } else if (max_probe_size > PROBE_BUF_MAX) {
467 max_probe_size = PROBE_BUF_MAX;
468 } else if (max_probe_size < PROBE_BUF_MIN) {
469 return AVERROR(EINVAL);
472 if (offset >= max_probe_size) {
473 return AVERROR(EINVAL);
476 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
477 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
478 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
479 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
482 if (probe_size < offset) {
486 /* read probe data */
487 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
490 return AVERROR(ENOMEM);
493 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
494 /* fail if error was not end of file, otherwise, lower score */
495 if (ret != AVERROR_EOF) {
500 ret = 0; /* error was end of file, nothing read */
503 pd.buf = &buf[offset];
505 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
507 /* guess file format */
508 *fmt = av_probe_input_format2(&pd, 1, &score);
510 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
511 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
513 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
519 return AVERROR_INVALIDDATA;
522 /* rewind. reuse probe buffer to avoid seeking */
523 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
529 /* open input file and probe the format if necessary */
530 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
533 AVProbeData pd = {filename, NULL, 0};
536 s->flags |= AVFMT_FLAG_CUSTOM_IO;
538 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
539 else if (s->iformat->flags & AVFMT_NOFILE)
540 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
541 "will be ignored with AVFMT_NOFILE format.\n");
545 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
546 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
549 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags,
550 &s->interrupt_callback, options)) < 0)
554 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize);
557 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
558 AVPacketList **plast_pktl){
559 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
564 (*plast_pktl)->next = pktl;
566 *packet_buffer = pktl;
568 /* add the packet in the buffered packet list */
574 static void queue_attached_pictures(AVFormatContext *s)
577 for (i = 0; i < s->nb_streams; i++)
578 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
579 s->streams[i]->discard < AVDISCARD_ALL) {
580 AVPacket copy = s->streams[i]->attached_pic;
581 copy.destruct = NULL;
582 add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end);
586 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
588 AVFormatContext *s = *ps;
590 AVDictionary *tmp = NULL;
591 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
593 if (!s && !(s = avformat_alloc_context()))
594 return AVERROR(ENOMEM);
596 av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
597 return AVERROR(EINVAL);
603 av_dict_copy(&tmp, *options, 0);
605 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
608 if ((ret = init_input(s, filename, &tmp)) < 0)
611 /* check filename in case an image number is expected */
612 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
613 if (!av_filename_number_test(filename)) {
614 ret = AVERROR(EINVAL);
619 s->duration = s->start_time = AV_NOPTS_VALUE;
620 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
622 /* allocate private data */
623 if (s->iformat->priv_data_size > 0) {
624 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
625 ret = AVERROR(ENOMEM);
628 if (s->iformat->priv_class) {
629 *(const AVClass**)s->priv_data = s->iformat->priv_class;
630 av_opt_set_defaults(s->priv_data);
631 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
636 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
638 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
640 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
641 if ((ret = s->iformat->read_header(s)) < 0)
644 if (id3v2_extra_meta &&
645 (ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
647 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
649 queue_attached_pictures(s);
651 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
652 s->data_offset = avio_tell(s->pb);
654 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
657 av_dict_free(options);
664 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
666 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
668 avformat_free_context(s);
673 /*******************************************************/
675 static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
677 if(st->request_probe>0){
678 AVProbeData *pd = &st->probe_data;
680 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
684 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
688 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
689 pd->buf_size += pkt->size;
690 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
693 st->probe_packets = 0;
696 end= s->raw_packet_buffer_remaining_size <= 0
697 || st->probe_packets<=0;
699 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
700 int score= set_codec_from_probe_data(s, st, pd);
701 if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
705 st->request_probe= -1;
706 if(st->codec->codec_id != AV_CODEC_ID_NONE){
707 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
709 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
715 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
721 AVPacketList *pktl = s->raw_packet_buffer;
725 st = s->streams[pkt->stream_index];
726 if(st->request_probe <= 0){
727 s->raw_packet_buffer = pktl->next;
728 s->raw_packet_buffer_remaining_size += pkt->size;
735 ret= s->iformat->read_packet(s, pkt);
737 if (!pktl || ret == AVERROR(EAGAIN))
739 for (i = 0; i < s->nb_streams; i++) {
741 if (st->probe_packets) {
742 probe_codec(s, st, NULL);
744 av_assert0(st->request_probe <= 0);
749 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
750 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
751 av_log(s, AV_LOG_WARNING,
752 "Dropped corrupted packet (stream = %d)\n",
758 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
759 av_packet_merge_side_data(pkt);
761 if(pkt->stream_index >= (unsigned)s->nb_streams){
762 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
766 st= s->streams[pkt->stream_index];
768 switch(st->codec->codec_type){
769 case AVMEDIA_TYPE_VIDEO:
770 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
772 case AVMEDIA_TYPE_AUDIO:
773 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
775 case AVMEDIA_TYPE_SUBTITLE:
776 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
780 if(!pktl && st->request_probe <= 0)
783 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
784 s->raw_packet_buffer_remaining_size -= pkt->size;
786 probe_codec(s, st, pkt);
790 #if FF_API_READ_PACKET
791 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
793 return ff_read_packet(s, pkt);
798 /**********************************************************/
800 static int determinable_frame_size(AVCodecContext *avctx)
802 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
803 avctx->codec_id == AV_CODEC_ID_MP1 ||
804 avctx->codec_id == AV_CODEC_ID_MP2 ||
805 avctx->codec_id == AV_CODEC_ID_MP3/* ||
806 avctx->codec_id == AV_CODEC_ID_CELT*/)
812 * Get the number of samples of an audio frame. Return -1 on error.
814 static int get_audio_frame_size(AVCodecContext *enc, int size, int mux)
818 /* give frame_size priority if demuxing */
819 if (!mux && enc->frame_size > 1)
820 return enc->frame_size;
822 if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
825 /* fallback to using frame_size if muxing */
826 if (enc->frame_size > 1)
827 return enc->frame_size;
834 * Return the frame duration in seconds. Return 0 if not available.
836 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
837 AVCodecParserContext *pc, AVPacket *pkt)
843 switch(st->codec->codec_type) {
844 case AVMEDIA_TYPE_VIDEO:
845 if (st->r_frame_rate.num && !pc) {
846 *pnum = st->r_frame_rate.den;
847 *pden = st->r_frame_rate.num;
848 } else if(st->time_base.num*1000LL > st->time_base.den) {
849 *pnum = st->time_base.num;
850 *pden = st->time_base.den;
851 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
852 *pnum = st->codec->time_base.num;
853 *pden = st->codec->time_base.den;
854 if (pc && pc->repeat_pict) {
855 *pnum = (*pnum) * (1 + pc->repeat_pict);
857 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
858 //Thus if we have no parser in such case leave duration undefined.
859 if(st->codec->ticks_per_frame>1 && !pc){
864 case AVMEDIA_TYPE_AUDIO:
865 frame_size = get_audio_frame_size(st->codec, pkt->size, 0);
866 if (frame_size <= 0 || st->codec->sample_rate <= 0)
869 *pden = st->codec->sample_rate;
876 static int is_intra_only(AVCodecContext *enc){
877 AVCodecDescriptor *desc;
879 if(enc->codec_type != AVMEDIA_TYPE_VIDEO)
882 desc = av_codec_get_codec_descriptor(enc);
884 desc = avcodec_descriptor_get(enc->codec_id);
885 av_codec_set_codec_descriptor(enc, desc);
888 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
892 static int has_decode_delay_been_guessed(AVStream *st)
894 if(st->codec->codec_id != AV_CODEC_ID_H264) return 1;
895 #if CONFIG_H264_DECODER
896 if(st->codec->has_b_frames &&
897 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
900 if(st->codec->has_b_frames<3)
901 return st->nb_decoded_frames >= 7;
902 else if(st->codec->has_b_frames<4)
903 return st->nb_decoded_frames >= 18;
905 return st->nb_decoded_frames >= 20;
908 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
912 if (pktl == s->parse_queue_end)
913 return s->packet_buffer;
917 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
918 int64_t dts, int64_t pts)
920 AVStream *st= s->streams[stream_index];
921 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
923 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
926 st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
929 if (is_relative(pts))
930 pts += st->first_dts - RELATIVE_TS_BASE;
932 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
933 if(pktl->pkt.stream_index != stream_index)
935 if(is_relative(pktl->pkt.pts))
936 pktl->pkt.pts += st->first_dts - RELATIVE_TS_BASE;
938 if(is_relative(pktl->pkt.dts))
939 pktl->pkt.dts += st->first_dts - RELATIVE_TS_BASE;
941 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
942 st->start_time= pktl->pkt.pts;
944 if (st->start_time == AV_NOPTS_VALUE)
945 st->start_time = pts;
948 static void update_initial_durations(AVFormatContext *s, AVStream *st,
949 int stream_index, int duration)
951 AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
952 int64_t cur_dts= RELATIVE_TS_BASE;
954 if(st->first_dts != AV_NOPTS_VALUE){
955 cur_dts= st->first_dts;
956 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
957 if(pktl->pkt.stream_index == stream_index){
958 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
963 if(pktl && pktl->pkt.dts != st->first_dts) {
964 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));
968 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts));
971 pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
972 st->first_dts = cur_dts;
973 }else if(st->cur_dts != RELATIVE_TS_BASE)
976 for(; pktl; pktl= get_next_pkt(s, st, pktl)){
977 if(pktl->pkt.stream_index != stream_index)
979 if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts)
980 && !pktl->pkt.duration){
981 pktl->pkt.dts= cur_dts;
982 if(!st->codec->has_b_frames)
983 pktl->pkt.pts= cur_dts;
984 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
985 pktl->pkt.duration = duration;
988 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
991 st->cur_dts= cur_dts;
994 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
995 AVCodecParserContext *pc, AVPacket *pkt)
997 int num, den, presentation_delayed, delay, i;
1000 if (s->flags & AVFMT_FLAG_NOFILLIN)
1003 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1004 pkt->dts= AV_NOPTS_VALUE;
1006 if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
1007 //FIXME Set low_delay = 0 when has_b_frames = 1
1008 st->codec->has_b_frames = 1;
1010 /* do we have a video B-frame ? */
1011 delay= st->codec->has_b_frames;
1012 presentation_delayed = 0;
1014 /* XXX: need has_b_frame, but cannot get it if the codec is
1017 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1018 presentation_delayed = 1;
1020 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts && st->pts_wrap_bits<63){
1021 pkt->dts -= 1LL<<st->pts_wrap_bits;
1024 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1025 // we take the conservative approach and discard both
1026 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1027 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1028 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1029 if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1030 pkt->dts= AV_NOPTS_VALUE;
1033 if (pkt->duration == 0) {
1034 compute_frame_duration(&num, &den, st, pc, pkt);
1036 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1039 if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue))
1040 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1042 /* correct timestamps with byte offset if demuxers only have timestamps
1043 on packet boundaries */
1044 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1045 /* this will estimate bitrate based on this frame's duration and size */
1046 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1047 if(pkt->pts != AV_NOPTS_VALUE)
1049 if(pkt->dts != AV_NOPTS_VALUE)
1053 if (pc && pc->dts_sync_point >= 0) {
1054 // we have synchronization info from the parser
1055 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1057 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1058 if (pkt->dts != AV_NOPTS_VALUE) {
1059 // got DTS from the stream, update reference timestamp
1060 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1061 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1062 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1063 // compute DTS based on reference timestamp
1064 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1065 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1067 if (pc->dts_sync_point > 0)
1068 st->reference_dts = pkt->dts; // new reference
1072 /* This may be redundant, but it should not hurt. */
1073 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1074 presentation_delayed = 1;
1076 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n",
1077 // presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration);
1078 /* interpolate PTS and DTS if they are not present */
1079 //We skip H264 currently because delay and has_b_frames are not reliably set
1080 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){
1081 if (presentation_delayed) {
1082 /* DTS = decompression timestamp */
1083 /* PTS = presentation timestamp */
1084 if (pkt->dts == AV_NOPTS_VALUE)
1085 pkt->dts = st->last_IP_pts;
1086 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1087 if (pkt->dts == AV_NOPTS_VALUE)
1088 pkt->dts = st->cur_dts;
1090 /* this is tricky: the dts must be incremented by the duration
1091 of the frame we are displaying, i.e. the last I- or P-frame */
1092 if (st->last_IP_duration == 0)
1093 st->last_IP_duration = pkt->duration;
1094 if(pkt->dts != AV_NOPTS_VALUE)
1095 st->cur_dts = pkt->dts + st->last_IP_duration;
1096 st->last_IP_duration = pkt->duration;
1097 st->last_IP_pts= pkt->pts;
1098 /* cannot compute PTS if not present (we can compute it only
1099 by knowing the future */
1100 } else if (pkt->pts != AV_NOPTS_VALUE ||
1101 pkt->dts != AV_NOPTS_VALUE ||
1103 int duration = pkt->duration;
1105 if(pkt->pts != AV_NOPTS_VALUE && duration){
1106 int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts);
1107 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1108 if( old_diff < new_diff && old_diff < (duration>>3)
1109 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO
1110 && (!strcmp(s->iformat->name, "mpeg") ||
1111 !strcmp(s->iformat->name, "mpegts"))){
1112 pkt->pts += duration;
1113 av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n");
1114 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n",
1115 // pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size);
1119 /* presentation is not delayed : PTS and DTS are the same */
1120 if (pkt->pts == AV_NOPTS_VALUE)
1121 pkt->pts = pkt->dts;
1122 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1124 if (pkt->pts == AV_NOPTS_VALUE)
1125 pkt->pts = st->cur_dts;
1126 pkt->dts = pkt->pts;
1127 if (pkt->pts != AV_NOPTS_VALUE)
1128 st->cur_dts = pkt->pts + duration;
1132 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
1133 st->pts_buffer[0]= pkt->pts;
1134 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1135 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1136 if(pkt->dts == AV_NOPTS_VALUE)
1137 pkt->dts= st->pts_buffer[0];
1138 if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here
1139 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1141 if(pkt->dts > st->cur_dts)
1142 st->cur_dts = pkt->dts;
1145 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1146 // presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1149 if (is_intra_only(st->codec))
1150 pkt->flags |= AV_PKT_FLAG_KEY;
1152 pkt->convergence_duration = pc->convergence_duration;
1155 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1158 AVPacketList *pktl = *pkt_buf;
1159 *pkt_buf = pktl->next;
1160 av_free_packet(&pktl->pkt);
1163 *pkt_buf_end = NULL;
1167 * Parse a packet, add all split parts to parse_queue
1169 * @param pkt packet to parse, NULL when flushing the parser at end of stream
1171 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1173 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1174 AVStream *st = s->streams[stream_index];
1175 uint8_t *data = pkt ? pkt->data : NULL;
1176 int size = pkt ? pkt->size : 0;
1177 int ret = 0, got_output = 0;
1180 av_init_packet(&flush_pkt);
1183 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1184 // preserve 0-size sync packets
1185 compute_pkt_fields(s, st, st->parser, pkt);
1188 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1191 av_init_packet(&out_pkt);
1192 len = av_parser_parse2(st->parser, st->codec,
1193 &out_pkt.data, &out_pkt.size, data, size,
1194 pkt->pts, pkt->dts, pkt->pos);
1196 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1198 /* increment read pointer */
1202 got_output = !!out_pkt.size;
1207 /* set the duration */
1208 out_pkt.duration = 0;
1209 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1210 if (st->codec->sample_rate > 0) {
1211 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1212 (AVRational){ 1, st->codec->sample_rate },
1216 } else if (st->codec->time_base.num != 0 &&
1217 st->codec->time_base.den != 0) {
1218 out_pkt.duration = av_rescale_q_rnd(st->parser->duration,
1219 st->codec->time_base,
1224 out_pkt.stream_index = st->index;
1225 out_pkt.pts = st->parser->pts;
1226 out_pkt.dts = st->parser->dts;
1227 out_pkt.pos = st->parser->pos;
1229 if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1230 out_pkt.pos = st->parser->frame_offset;
1232 if (st->parser->key_frame == 1 ||
1233 (st->parser->key_frame == -1 &&
1234 st->parser->pict_type == AV_PICTURE_TYPE_I))
1235 out_pkt.flags |= AV_PKT_FLAG_KEY;
1237 if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1238 out_pkt.flags |= AV_PKT_FLAG_KEY;
1240 compute_pkt_fields(s, st, st->parser, &out_pkt);
1242 if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
1243 out_pkt.destruct = pkt->destruct;
1244 pkt->destruct = NULL;
1246 if ((ret = av_dup_packet(&out_pkt)) < 0)
1249 if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
1250 av_free_packet(&out_pkt);
1251 ret = AVERROR(ENOMEM);
1257 /* end of the stream => close and free the parser */
1258 if (pkt == &flush_pkt) {
1259 av_parser_close(st->parser);
1264 av_free_packet(pkt);
1268 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1269 AVPacketList **pkt_buffer_end,
1273 av_assert0(*pkt_buffer);
1276 *pkt_buffer = pktl->next;
1278 *pkt_buffer_end = NULL;
1283 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1285 int ret = 0, i, got_packet = 0;
1287 av_init_packet(pkt);
1289 while (!got_packet && !s->parse_queue) {
1293 /* read next packet */
1294 ret = ff_read_packet(s, &cur_pkt);
1296 if (ret == AVERROR(EAGAIN))
1298 /* flush the parsers */
1299 for(i = 0; i < s->nb_streams; i++) {
1301 if (st->parser && st->need_parsing)
1302 parse_packet(s, NULL, st->index);
1304 /* all remaining packets are now in parse_queue =>
1305 * really terminate parsing */
1309 st = s->streams[cur_pkt.stream_index];
1311 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1312 cur_pkt.dts != AV_NOPTS_VALUE &&
1313 cur_pkt.pts < cur_pkt.dts) {
1314 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1315 cur_pkt.stream_index,
1316 av_ts2str(cur_pkt.pts),
1317 av_ts2str(cur_pkt.dts),
1320 if (s->debug & FF_FDEBUG_TS)
1321 av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1322 cur_pkt.stream_index,
1323 av_ts2str(cur_pkt.pts),
1324 av_ts2str(cur_pkt.dts),
1329 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1330 st->parser = av_parser_init(st->codec->codec_id);
1332 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1333 "%s, packets or times may be invalid.\n",
1334 avcodec_get_name(st->codec->codec_id));
1335 /* no parser available: just output the raw packets */
1336 st->need_parsing = AVSTREAM_PARSE_NONE;
1337 } else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) {
1338 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1339 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) {
1340 st->parser->flags |= PARSER_FLAG_ONCE;
1341 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
1342 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1346 if (!st->need_parsing || !st->parser) {
1347 /* no parsing needed: we just output the packet as is */
1349 compute_pkt_fields(s, st, NULL, pkt);
1350 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1351 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1352 ff_reduce_index(s, st->index);
1353 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1356 } else if (st->discard < AVDISCARD_ALL) {
1357 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1361 av_free_packet(&cur_pkt);
1363 if (pkt->flags & AV_PKT_FLAG_KEY)
1364 st->skip_to_keyframe = 0;
1365 if (st->skip_to_keyframe) {
1366 av_free_packet(&cur_pkt);
1371 if (!got_packet && s->parse_queue)
1372 ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
1374 if(s->debug & FF_FDEBUG_TS)
1375 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n",
1377 av_ts2str(pkt->pts),
1378 av_ts2str(pkt->dts),
1386 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1388 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1394 ret = s->packet_buffer ? read_from_packet_buffer(&s->packet_buffer,
1395 &s->packet_buffer_end,
1397 read_frame_internal(s, pkt);
1402 AVPacketList *pktl = s->packet_buffer;
1405 AVPacket *next_pkt = &pktl->pkt;
1407 if (next_pkt->dts != AV_NOPTS_VALUE) {
1408 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1409 // last dts seen for this stream. if any of packets following
1410 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1411 int64_t last_dts = next_pkt->dts;
1412 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1413 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1414 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1415 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1416 next_pkt->pts = pktl->pkt.dts;
1418 if (last_dts != AV_NOPTS_VALUE) {
1419 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1420 last_dts = pktl->pkt.dts;
1425 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1426 // Fixing the last reference frame had none pts issue (For MXF etc).
1427 // We only do this when
1429 // 2. we are not able to resolve a pts value for current packet.
1430 // 3. the packets for this stream at the end of the files had valid dts.
1431 next_pkt->pts = last_dts + next_pkt->duration;
1433 pktl = s->packet_buffer;
1436 /* read packet from packet buffer, if there is data */
1437 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1438 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1439 ret = read_from_packet_buffer(&s->packet_buffer,
1440 &s->packet_buffer_end, pkt);
1445 ret = read_frame_internal(s, pkt);
1447 if (pktl && ret != AVERROR(EAGAIN)) {
1454 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1455 &s->packet_buffer_end)) < 0)
1456 return AVERROR(ENOMEM);
1461 st = s->streams[pkt->stream_index];
1462 if (st->skip_samples) {
1463 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1464 AV_WL32(p, st->skip_samples);
1465 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples);
1466 st->skip_samples = 0;
1469 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1470 ff_reduce_index(s, st->index);
1471 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1474 if (is_relative(pkt->dts))
1475 pkt->dts -= RELATIVE_TS_BASE;
1476 if (is_relative(pkt->pts))
1477 pkt->pts -= RELATIVE_TS_BASE;
1482 /* XXX: suppress the packet queue */
1483 static void flush_packet_queue(AVFormatContext *s)
1485 free_packet_buffer(&s->parse_queue, &s->parse_queue_end);
1486 free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end);
1487 free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
1489 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1492 /*******************************************************/
1495 int av_find_default_stream_index(AVFormatContext *s)
1497 int first_audio_index = -1;
1501 if (s->nb_streams <= 0)
1503 for(i = 0; i < s->nb_streams; i++) {
1505 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1506 !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
1509 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1510 first_audio_index = i;
1512 return first_audio_index >= 0 ? first_audio_index : 0;
1516 * Flush the frame reader.
1518 void ff_read_frame_flush(AVFormatContext *s)
1523 flush_packet_queue(s);
1525 /* for each stream, reset read state */
1526 for(i = 0; i < s->nb_streams; i++) {
1530 av_parser_close(st->parser);
1533 st->last_IP_pts = AV_NOPTS_VALUE;
1534 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
1535 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1536 st->reference_dts = AV_NOPTS_VALUE;
1538 st->probe_packets = MAX_PROBE_PACKETS;
1540 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1541 st->pts_buffer[j]= AV_NOPTS_VALUE;
1545 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1549 for(i = 0; i < s->nb_streams; i++) {
1550 AVStream *st = s->streams[i];
1552 st->cur_dts = av_rescale(timestamp,
1553 st->time_base.den * (int64_t)ref_st->time_base.num,
1554 st->time_base.num * (int64_t)ref_st->time_base.den);
1558 void ff_reduce_index(AVFormatContext *s, int stream_index)
1560 AVStream *st= s->streams[stream_index];
1561 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1563 if((unsigned)st->nb_index_entries >= max_entries){
1565 for(i=0; 2*i<st->nb_index_entries; i++)
1566 st->index_entries[i]= st->index_entries[2*i];
1567 st->nb_index_entries= i;
1571 int ff_add_index_entry(AVIndexEntry **index_entries,
1572 int *nb_index_entries,
1573 unsigned int *index_entries_allocated_size,
1574 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1576 AVIndexEntry *entries, *ie;
1579 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1582 if(timestamp == AV_NOPTS_VALUE)
1583 return AVERROR(EINVAL);
1585 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1586 timestamp -= RELATIVE_TS_BASE;
1588 entries = av_fast_realloc(*index_entries,
1589 index_entries_allocated_size,
1590 (*nb_index_entries + 1) *
1591 sizeof(AVIndexEntry));
1595 *index_entries= entries;
1597 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1600 index= (*nb_index_entries)++;
1601 ie= &entries[index];
1602 assert(index==0 || ie[-1].timestamp < timestamp);
1604 ie= &entries[index];
1605 if(ie->timestamp != timestamp){
1606 if(ie->timestamp <= timestamp)
1608 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1609 (*nb_index_entries)++;
1610 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1611 distance= ie->min_distance;
1615 ie->timestamp = timestamp;
1616 ie->min_distance= distance;
1623 int av_add_index_entry(AVStream *st,
1624 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1626 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1627 &st->index_entries_allocated_size, pos,
1628 timestamp, size, distance, flags);
1631 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1632 int64_t wanted_timestamp, int flags)
1640 //optimize appending index entries at the end
1641 if(b && entries[b-1].timestamp < wanted_timestamp)
1646 timestamp = entries[m].timestamp;
1647 if(timestamp >= wanted_timestamp)
1649 if(timestamp <= wanted_timestamp)
1652 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1654 if(!(flags & AVSEEK_FLAG_ANY)){
1655 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1656 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1665 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1668 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1669 wanted_timestamp, flags);
1672 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1674 AVInputFormat *avif= s->iformat;
1675 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1676 int64_t ts_min, ts_max, ts;
1681 if (stream_index < 0)
1684 av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1687 ts_min= AV_NOPTS_VALUE;
1688 pos_limit= -1; //gcc falsely says it may be uninitialized
1690 st= s->streams[stream_index];
1691 if(st->index_entries){
1694 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()
1695 index= FFMAX(index, 0);
1696 e= &st->index_entries[index];
1698 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1700 ts_min= e->timestamp;
1701 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1702 pos_min, av_ts2str(ts_min));
1707 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1708 assert(index < st->nb_index_entries);
1710 e= &st->index_entries[index];
1711 assert(e->timestamp >= target_ts);
1713 ts_max= e->timestamp;
1714 pos_limit= pos_max - e->min_distance;
1715 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n",
1716 pos_max, pos_limit, av_ts2str(ts_max));
1720 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1725 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1728 ff_read_frame_flush(s);
1729 ff_update_cur_dts(s, st, ts);
1734 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1735 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1736 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1737 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1740 int64_t start_pos, filesize;
1743 av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1745 if(ts_min == AV_NOPTS_VALUE){
1746 pos_min = s->data_offset;
1747 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1748 if (ts_min == AV_NOPTS_VALUE)
1752 if(ts_min >= target_ts){
1757 if(ts_max == AV_NOPTS_VALUE){
1759 filesize = avio_size(s->pb);
1760 pos_max = filesize - 1;
1763 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1765 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1766 if (ts_max == AV_NOPTS_VALUE)
1770 int64_t tmp_pos= pos_max + 1;
1771 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1772 if(tmp_ts == AV_NOPTS_VALUE)
1776 if(tmp_pos >= filesize)
1782 if(ts_max <= target_ts){
1787 if(ts_min > ts_max){
1789 }else if(ts_min == ts_max){
1794 while (pos_min < pos_limit) {
1795 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
1796 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
1797 assert(pos_limit <= pos_max);
1800 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1801 // interpolate position (better than dichotomy)
1802 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1803 + pos_min - approximate_keyframe_distance;
1804 }else if(no_change==1){
1805 // bisection, if interpolation failed to change min or max pos last time
1806 pos = (pos_min + pos_limit)>>1;
1808 /* linear search if bisection failed, can only happen if there
1809 are very few or no keyframes between min/max */
1814 else if(pos > pos_limit)
1818 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1823 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
1824 pos_min, pos, pos_max,
1825 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
1826 pos_limit, start_pos, no_change);
1827 if(ts == AV_NOPTS_VALUE){
1828 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1831 assert(ts != AV_NOPTS_VALUE);
1832 if (target_ts <= ts) {
1833 pos_limit = start_pos - 1;
1837 if (target_ts >= ts) {
1843 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1844 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1847 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1849 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1850 av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n",
1851 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
1857 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1858 int64_t pos_min, pos_max;
1860 pos_min = s->data_offset;
1861 pos_max = avio_size(s->pb) - 1;
1863 if (pos < pos_min) pos= pos_min;
1864 else if(pos > pos_max) pos= pos_max;
1866 avio_seek(s->pb, pos, SEEK_SET);
1871 static int seek_frame_generic(AVFormatContext *s,
1872 int stream_index, int64_t timestamp, int flags)
1879 st = s->streams[stream_index];
1881 index = av_index_search_timestamp(st, timestamp, flags);
1883 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1886 if(index < 0 || index==st->nb_index_entries-1){
1890 if(st->nb_index_entries){
1891 assert(st->index_entries);
1892 ie= &st->index_entries[st->nb_index_entries-1];
1893 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1895 ff_update_cur_dts(s, st, ie->timestamp);
1897 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1903 read_status = av_read_frame(s, &pkt);
1904 } while (read_status == AVERROR(EAGAIN));
1905 if (read_status < 0)
1907 av_free_packet(&pkt);
1908 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1909 if(pkt.flags & AV_PKT_FLAG_KEY)
1911 if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){
1912 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);
1917 index = av_index_search_timestamp(st, timestamp, flags);
1922 ff_read_frame_flush(s);
1923 AV_NOWARN_DEPRECATED(
1924 if (s->iformat->read_seek){
1925 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1929 ie = &st->index_entries[index];
1930 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1932 ff_update_cur_dts(s, st, ie->timestamp);
1937 static int seek_frame_internal(AVFormatContext *s, int stream_index,
1938 int64_t timestamp, int flags)
1943 if (flags & AVSEEK_FLAG_BYTE) {
1944 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1946 ff_read_frame_flush(s);
1947 return seek_frame_byte(s, stream_index, timestamp, flags);
1950 if(stream_index < 0){
1951 stream_index= av_find_default_stream_index(s);
1952 if(stream_index < 0)
1955 st= s->streams[stream_index];
1956 /* timestamp for default must be expressed in AV_TIME_BASE units */
1957 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1960 /* first, we try the format specific seek */
1961 AV_NOWARN_DEPRECATED(
1962 if (s->iformat->read_seek) {
1963 ff_read_frame_flush(s);
1964 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1972 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1973 ff_read_frame_flush(s);
1974 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1975 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1976 ff_read_frame_flush(s);
1977 return seek_frame_generic(s, stream_index, timestamp, flags);
1983 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1985 int ret = seek_frame_internal(s, stream_index, timestamp, flags);
1988 queue_attached_pictures(s);
1993 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1995 if(min_ts > ts || max_ts < ts)
1998 if (s->iformat->read_seek2) {
2000 ff_read_frame_flush(s);
2001 ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
2004 queue_attached_pictures(s);
2008 if(s->iformat->read_timestamp){
2009 //try to seek via read_timestamp()
2012 //Fallback to old API if new is not implemented but old is
2013 //Note the old has somewat different sematics
2014 AV_NOWARN_DEPRECATED(
2015 if (s->iformat->read_seek || 1) {
2016 int dir = (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0);
2017 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2018 if (ret<0 && ts != min_ts && max_ts != ts) {
2019 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2021 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2027 // try some generic seek like seek_frame_generic() but with new ts semantics
2030 /*******************************************************/
2033 * Return TRUE if the stream has accurate duration in any stream.
2035 * @return TRUE if the stream has accurate duration for at least one component.
2037 static int has_duration(AVFormatContext *ic)
2042 for(i = 0;i < ic->nb_streams; i++) {
2043 st = ic->streams[i];
2044 if (st->duration != AV_NOPTS_VALUE)
2047 if (ic->duration != AV_NOPTS_VALUE)
2053 * Estimate the stream timings from the one of each components.
2055 * Also computes the global bitrate if possible.
2057 static void update_stream_timings(AVFormatContext *ic)
2059 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2060 int64_t duration, duration1, filesize;
2064 start_time = INT64_MAX;
2065 start_time_text = INT64_MAX;
2066 end_time = INT64_MIN;
2067 duration = INT64_MIN;
2068 for(i = 0;i < ic->nb_streams; i++) {
2069 st = ic->streams[i];
2070 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2071 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
2072 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2073 if (start_time1 < start_time_text)
2074 start_time_text = start_time1;
2076 start_time = FFMIN(start_time, start_time1);
2077 if (st->duration != AV_NOPTS_VALUE) {
2078 end_time1 = start_time1
2079 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2080 end_time = FFMAX(end_time, end_time1);
2083 if (st->duration != AV_NOPTS_VALUE) {
2084 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
2085 duration = FFMAX(duration, duration1);
2088 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2089 start_time = start_time_text;
2090 else if(start_time > start_time_text)
2091 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2093 if (start_time != INT64_MAX) {
2094 ic->start_time = start_time;
2095 if (end_time != INT64_MIN)
2096 duration = FFMAX(duration, end_time - start_time);
2098 if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
2099 ic->duration = duration;
2101 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2102 /* compute the bitrate */
2103 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
2104 (double)ic->duration;
2108 static void fill_all_stream_timings(AVFormatContext *ic)
2113 update_stream_timings(ic);
2114 for(i = 0;i < ic->nb_streams; i++) {
2115 st = ic->streams[i];
2116 if (st->start_time == AV_NOPTS_VALUE) {
2117 if(ic->start_time != AV_NOPTS_VALUE)
2118 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
2119 if(ic->duration != AV_NOPTS_VALUE)
2120 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
2125 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2127 int64_t filesize, duration;
2131 /* if bit_rate is already set, we believe it */
2132 if (ic->bit_rate <= 0) {
2134 for(i=0;i<ic->nb_streams;i++) {
2135 st = ic->streams[i];
2136 if (st->codec->bit_rate > 0)
2137 bit_rate += st->codec->bit_rate;
2139 ic->bit_rate = bit_rate;
2142 /* if duration is already set, we believe it */
2143 if (ic->duration == AV_NOPTS_VALUE &&
2144 ic->bit_rate != 0) {
2145 filesize = ic->pb ? avio_size(ic->pb) : 0;
2147 for(i = 0; i < ic->nb_streams; i++) {
2148 st = ic->streams[i];
2149 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
2150 if (st->duration == AV_NOPTS_VALUE)
2151 st->duration = duration;
2157 #define DURATION_MAX_READ_SIZE 250000
2158 #define DURATION_MAX_RETRY 3
2160 /* only usable for MPEG-PS streams */
2161 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2163 AVPacket pkt1, *pkt = &pkt1;
2165 int read_size, i, ret;
2167 int64_t filesize, offset, duration;
2170 /* flush packet queue */
2171 flush_packet_queue(ic);
2173 for (i=0; i<ic->nb_streams; i++) {
2174 st = ic->streams[i];
2175 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
2176 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
2179 av_parser_close(st->parser);
2184 /* estimate the end time (duration) */
2185 /* XXX: may need to support wrapping */
2186 filesize = ic->pb ? avio_size(ic->pb) : 0;
2187 end_time = AV_NOPTS_VALUE;
2189 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2193 avio_seek(ic->pb, offset, SEEK_SET);
2196 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2200 ret = ff_read_packet(ic, pkt);
2201 } while(ret == AVERROR(EAGAIN));
2204 read_size += pkt->size;
2205 st = ic->streams[pkt->stream_index];
2206 if (pkt->pts != AV_NOPTS_VALUE &&
2207 (st->start_time != AV_NOPTS_VALUE ||
2208 st->first_dts != AV_NOPTS_VALUE)) {
2209 duration = end_time = pkt->pts;
2210 if (st->start_time != AV_NOPTS_VALUE)
2211 duration -= st->start_time;
2213 duration -= st->first_dts;
2215 duration += 1LL<<st->pts_wrap_bits;
2217 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2218 st->duration = duration;
2221 av_free_packet(pkt);
2223 }while( end_time==AV_NOPTS_VALUE
2224 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2225 && ++retry <= DURATION_MAX_RETRY);
2227 fill_all_stream_timings(ic);
2229 avio_seek(ic->pb, old_offset, SEEK_SET);
2230 for (i=0; i<ic->nb_streams; i++) {
2232 st->cur_dts= st->first_dts;
2233 st->last_IP_pts = AV_NOPTS_VALUE;
2234 st->reference_dts = AV_NOPTS_VALUE;
2238 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2242 /* get the file size, if possible */
2243 if (ic->iformat->flags & AVFMT_NOFILE) {
2246 file_size = avio_size(ic->pb);
2247 file_size = FFMAX(0, file_size);
2250 if ((!strcmp(ic->iformat->name, "mpeg") ||
2251 !strcmp(ic->iformat->name, "mpegts")) &&
2252 file_size && ic->pb->seekable) {
2253 /* get accurate estimate from the PTSes */
2254 estimate_timings_from_pts(ic, old_offset);
2255 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2256 } else if (has_duration(ic)) {
2257 /* at least one component has timings - we use them for all
2259 fill_all_stream_timings(ic);
2260 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2262 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2263 /* less precise: use bitrate info */
2264 estimate_timings_from_bit_rate(ic);
2265 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2267 update_stream_timings(ic);
2271 AVStream av_unused *st;
2272 for(i = 0;i < ic->nb_streams; i++) {
2273 st = ic->streams[i];
2274 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2275 (double) st->start_time / AV_TIME_BASE,
2276 (double) st->duration / AV_TIME_BASE);
2278 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2279 (double) ic->start_time / AV_TIME_BASE,
2280 (double) ic->duration / AV_TIME_BASE,
2281 ic->bit_rate / 1000);
2285 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2287 AVCodecContext *avctx = st->codec;
2289 #define FAIL(errmsg) do { \
2291 *errmsg_ptr = errmsg; \
2295 switch (avctx->codec_type) {
2296 case AVMEDIA_TYPE_AUDIO:
2297 if (!avctx->frame_size && determinable_frame_size(avctx))
2298 FAIL("unspecified sample size");
2299 if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2300 FAIL("unspecified sample format");
2301 if (!avctx->sample_rate)
2302 FAIL("unspecified sample rate");
2303 if (!avctx->channels)
2304 FAIL("unspecified number of channels");
2306 case AVMEDIA_TYPE_VIDEO:
2308 FAIL("unspecified size");
2309 if (st->info->found_decoder >= 0 && avctx->pix_fmt == PIX_FMT_NONE)
2310 FAIL("unspecified pixel format");
2312 case AVMEDIA_TYPE_SUBTITLE:
2313 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2314 FAIL("unspecified size");
2316 case AVMEDIA_TYPE_DATA:
2317 if(avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2320 if (avctx->codec_id == AV_CODEC_ID_NONE)
2321 FAIL("unknown codec");
2325 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2326 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2329 int got_picture = 1, ret = 0;
2331 AVSubtitle subtitle;
2332 AVPacket pkt = *avpkt;
2334 if (!avcodec_is_open(st->codec) && !st->info->found_decoder) {
2335 AVDictionary *thread_opt = NULL;
2337 codec = st->codec->codec ? st->codec->codec :
2338 avcodec_find_decoder(st->codec->codec_id);
2341 st->info->found_decoder = -1;
2345 /* force thread count to 1 since the h264 decoder will not extract SPS
2346 * and PPS to extradata during multi-threaded decoding */
2347 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2348 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2350 av_dict_free(&thread_opt);
2352 st->info->found_decoder = -1;
2355 st->info->found_decoder = 1;
2356 } else if (!st->info->found_decoder)
2357 st->info->found_decoder = 1;
2359 if (st->info->found_decoder < 0)
2362 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2364 (!has_codec_parameters(st, NULL) ||
2365 !has_decode_delay_been_guessed(st) ||
2366 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2368 avcodec_get_frame_defaults(&picture);
2369 switch(st->codec->codec_type) {
2370 case AVMEDIA_TYPE_VIDEO:
2371 ret = avcodec_decode_video2(st->codec, &picture,
2372 &got_picture, &pkt);
2374 case AVMEDIA_TYPE_AUDIO:
2375 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2377 case AVMEDIA_TYPE_SUBTITLE:
2378 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2379 &got_picture, &pkt);
2387 st->nb_decoded_frames++;
2393 if(!pkt.data && !got_picture)
2398 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2400 while (tags->id != AV_CODEC_ID_NONE) {
2408 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2411 for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) {
2412 if(tag == tags[i].tag)
2415 for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) {
2416 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2419 return AV_CODEC_ID_NONE;
2422 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id)
2425 for(i=0; tags && tags[i]; i++){
2426 int tag= ff_codec_get_tag(tags[i], id);
2432 enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2435 for(i=0; tags && tags[i]; i++){
2436 enum AVCodecID id= ff_codec_get_id(tags[i], tag);
2437 if(id!=AV_CODEC_ID_NONE) return id;
2439 return AV_CODEC_ID_NONE;
2442 static void compute_chapters_end(AVFormatContext *s)
2445 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2447 for (i = 0; i < s->nb_chapters; i++)
2448 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2449 AVChapter *ch = s->chapters[i];
2450 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2453 for (j = 0; j < s->nb_chapters; j++) {
2454 AVChapter *ch1 = s->chapters[j];
2455 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2456 if (j != i && next_start > ch->start && next_start < end)
2459 ch->end = (end == INT64_MAX) ? ch->start : end;
2463 static int get_std_framerate(int i){
2464 if(i<60*12) return (i+1)*1001;
2465 else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12;
2469 * Is the time base unreliable.
2470 * This is a heuristic to balance between quick acceptance of the values in
2471 * the headers vs. some extra checks.
2472 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2473 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2474 * And there are "variable" fps files this needs to detect as well.
2476 static int tb_unreliable(AVCodecContext *c){
2477 if( c->time_base.den >= 101L*c->time_base.num
2478 || c->time_base.den < 5L*c->time_base.num
2479 /* || c->codec_tag == AV_RL32("DIVX")
2480 || c->codec_tag == AV_RL32("XVID")*/
2481 || c->codec_id == AV_CODEC_ID_MPEG2VIDEO
2482 || c->codec_id == AV_CODEC_ID_H264
2488 #if FF_API_FORMAT_PARAMETERS
2489 int av_find_stream_info(AVFormatContext *ic)
2491 return avformat_find_stream_info(ic, NULL);
2495 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2497 int i, count, ret, read_size, j;
2499 AVPacket pkt1, *pkt;
2500 int64_t old_offset = avio_tell(ic->pb);
2501 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2502 int flush_codecs = ic->probesize > 0;
2505 av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2507 for(i=0;i<ic->nb_streams;i++) {
2509 AVDictionary *thread_opt = NULL;
2510 st = ic->streams[i];
2512 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2513 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2514 /* if(!st->time_base.num)
2516 if(!st->codec->time_base.num)
2517 st->codec->time_base= st->time_base;
2519 //only for the split stuff
2520 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2521 st->parser = av_parser_init(st->codec->codec_id);
2523 if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
2524 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2525 } else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
2526 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
2528 } else if (st->need_parsing) {
2529 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
2530 "%s, packets or times may be invalid.\n",
2531 avcodec_get_name(st->codec->codec_id));
2534 codec = st->codec->codec ? st->codec->codec :
2535 avcodec_find_decoder(st->codec->codec_id);
2537 /* force thread count to 1 since the h264 decoder will not extract SPS
2538 * and PPS to extradata during multi-threaded decoding */
2539 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2541 /* Ensure that subtitle_header is properly set. */
2542 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2543 && codec && !st->codec->codec)
2544 avcodec_open2(st->codec, codec, options ? &options[i]
2547 //try to just open decoders, in case this is enough to get parameters
2548 if (!has_codec_parameters(st, NULL)) {
2549 if (codec && !st->codec->codec)
2550 avcodec_open2(st->codec, codec, options ? &options[i]
2554 av_dict_free(&thread_opt);
2557 for (i=0; i<ic->nb_streams; i++) {
2558 #if FF_API_R_FRAME_RATE
2559 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2561 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
2562 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
2568 if (ff_check_interrupt(&ic->interrupt_callback)){
2570 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2574 /* check if one codec still needs to be handled */
2575 for(i=0;i<ic->nb_streams;i++) {
2576 int fps_analyze_framecount = 20;
2578 st = ic->streams[i];
2579 if (!has_codec_parameters(st, NULL))
2581 /* if the timebase is coarse (like the usual millisecond precision
2582 of mkv), we need to analyze more frames to reliably arrive at
2584 if (av_q2d(st->time_base) > 0.0005)
2585 fps_analyze_framecount *= 2;
2586 if (ic->fps_probe_size >= 0)
2587 fps_analyze_framecount = ic->fps_probe_size;
2588 /* variable fps and no guess at the real fps */
2589 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2590 && st->info->duration_count < fps_analyze_framecount
2591 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2593 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2595 if (st->first_dts == AV_NOPTS_VALUE &&
2596 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2597 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2600 if (i == ic->nb_streams) {
2601 /* NOTE: if the format has no header, then we need to read
2602 some packets to get most of the streams, so we cannot
2604 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2605 /* if we found the info for all the codecs, we can stop */
2607 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2612 /* we did not get all the codec info, but we read too much data */
2613 if (read_size >= ic->probesize) {
2615 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2616 for (i = 0; i < ic->nb_streams; i++)
2617 if (!ic->streams[i]->r_frame_rate.num &&
2618 ic->streams[i]->info->duration_count <= 1)
2619 av_log(ic, AV_LOG_WARNING,
2620 "Stream #%d: not enough frames to estimate rate; "
2621 "consider increasing probesize\n", i);
2625 /* NOTE: a new stream can be added there if no header in file
2626 (AVFMTCTX_NOHEADER) */
2627 ret = read_frame_internal(ic, &pkt1);
2628 if (ret == AVERROR(EAGAIN))
2636 if (ic->flags & AVFMT_FLAG_NOBUFFER) {
2639 pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
2640 &ic->packet_buffer_end);
2641 if ((ret = av_dup_packet(pkt)) < 0)
2642 goto find_stream_info_err;
2645 read_size += pkt->size;
2647 st = ic->streams[pkt->stream_index];
2648 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
2649 /* check for non-increasing dts */
2650 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2651 st->info->fps_last_dts >= pkt->dts) {
2652 av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: "
2653 "packet %d with DTS %"PRId64", packet %d with DTS "
2654 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2655 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2656 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2658 /* check for a discontinuity in dts - if the difference in dts
2659 * is more than 1000 times the average packet duration in the sequence,
2660 * we treat it as a discontinuity */
2661 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
2662 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
2663 (pkt->dts - st->info->fps_last_dts) / 1000 >
2664 (st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
2665 av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: "
2666 "packet %d with DTS %"PRId64", packet %d with DTS "
2667 "%"PRId64"\n", st->index, st->info->fps_last_dts_idx,
2668 st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts);
2669 st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE;
2672 /* update stored dts values */
2673 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
2674 st->info->fps_first_dts = pkt->dts;
2675 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
2677 st->info->fps_last_dts = pkt->dts;
2678 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
2680 if (st->codec_info_nb_frames>1) {
2682 if (st->time_base.den > 0)
2683 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2684 if (st->avg_frame_rate.num > 0)
2685 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
2687 if (t >= ic->max_analyze_duration) {
2688 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2691 st->info->codec_info_duration += pkt->duration;
2693 #if FF_API_R_FRAME_RATE
2695 int64_t last = st->info->last_dts;
2697 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2698 double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
2699 int64_t duration= pkt->dts - last;
2701 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2702 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2703 for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2704 int framerate= get_std_framerate(i);
2705 double sdts= dts*framerate/(1001*12);
2707 int ticks= lrintf(sdts+j*0.5);
2708 double error= sdts - ticks + j*0.5;
2709 st->info->duration_error[j][0][i] += error;
2710 st->info->duration_error[j][1][i] += error*error;
2713 st->info->duration_count++;
2714 // ignore the first 4 values, they might have some random jitter
2715 if (st->info->duration_count > 3)
2716 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2718 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2719 st->info->last_dts = pkt->dts;
2722 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2723 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2724 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2725 st->codec->extradata_size= i;
2726 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2727 if (!st->codec->extradata)
2728 return AVERROR(ENOMEM);
2729 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2730 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2734 /* if still no information, we try to open the codec and to
2735 decompress the frame. We try to avoid that in most cases as
2736 it takes longer and uses more memory. For MPEG-4, we need to
2737 decompress for QuickTime.
2739 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2740 least one frame of codec data, this makes sure the codec initializes
2741 the channel configuration and does not only trust the values from the container.
2743 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2745 st->codec_info_nb_frames++;
2750 AVPacket empty_pkt = { 0 };
2752 av_init_packet(&empty_pkt);
2754 ret = -1; /* we could not have all the codec parameters before EOF */
2755 for(i=0;i<ic->nb_streams;i++) {
2758 st = ic->streams[i];
2760 /* flush the decoders */
2761 if (st->info->found_decoder == 1) {
2763 err = try_decode_frame(st, &empty_pkt,
2764 (options && i < orig_nb_streams) ?
2765 &options[i] : NULL);
2766 } while (err > 0 && !has_codec_parameters(st, NULL));
2769 av_log(ic, AV_LOG_INFO,
2770 "decoding for stream %d failed\n", st->index);
2774 if (!has_codec_parameters(st, &errmsg)) {
2776 avcodec_string(buf, sizeof(buf), st->codec, 0);
2777 av_log(ic, AV_LOG_WARNING,
2778 "Could not find codec parameters for stream %d (%s): %s\n"
2779 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
2787 // close codecs which were opened in try_decode_frame()
2788 for(i=0;i<ic->nb_streams;i++) {
2789 st = ic->streams[i];
2790 avcodec_close(st->codec);
2792 for(i=0;i<ic->nb_streams;i++) {
2793 st = ic->streams[i];
2794 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2795 if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2796 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2797 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2798 st->codec->codec_tag= tag;
2801 /* estimate average framerate if not set by demuxer */
2802 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration) {
2804 double best_error = 0.01;
2806 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2807 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2808 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2810 /* round guessed framerate to a "standard" framerate if it's
2811 * within 1% of the original estimate*/
2812 for (j = 1; j < MAX_STD_TIMEBASES; j++) {
2813 AVRational std_fps = { get_std_framerate(j), 12*1001 };
2814 double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1);
2816 if (error < best_error) {
2818 best_fps = std_fps.num;
2822 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2823 best_fps, 12*1001, INT_MAX);
2826 // the check for tb_unreliable() is not completely correct, since this is not about handling
2827 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2828 // ipmovie.c produces.
2829 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)
2830 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);
2831 if (st->info->duration_count && !st->r_frame_rate.num
2832 && tb_unreliable(st->codec)) {
2834 double best_error= 0.01;
2836 for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2839 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2841 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2844 int n= st->info->duration_count;
2845 double a= st->info->duration_error[k][0][j] / n;
2846 double error= st->info->duration_error[k][1][j]/n - a*a;
2848 if(error < best_error && best_error> 0.000000001){
2850 num = get_std_framerate(j);
2853 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2856 // do not increase frame rate by more than 1 % in order to match a standard rate.
2857 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2858 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2861 if (!st->r_frame_rate.num){
2862 if( st->codec->time_base.den * (int64_t)st->time_base.num
2863 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2864 st->r_frame_rate.num = st->codec->time_base.den;
2865 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2867 st->r_frame_rate.num = st->time_base.den;
2868 st->r_frame_rate.den = st->time_base.num;
2871 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2872 if(!st->codec->bits_per_coded_sample)
2873 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2874 // set stream disposition based on audio service type
2875 switch (st->codec->audio_service_type) {
2876 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2877 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2878 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2879 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2880 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2881 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2882 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2883 st->disposition = AV_DISPOSITION_COMMENT; break;
2884 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2885 st->disposition = AV_DISPOSITION_KARAOKE; break;
2891 estimate_timings(ic, old_offset);
2893 compute_chapters_end(ic);
2895 find_stream_info_err:
2896 for (i=0; i < ic->nb_streams; i++) {
2897 if (ic->streams[i]->codec)
2898 ic->streams[i]->codec->thread_count = 0;
2899 av_freep(&ic->streams[i]->info);
2902 av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb));
2906 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2910 for (i = 0; i < ic->nb_programs; i++) {
2911 if (ic->programs[i] == last) {
2915 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2916 if (ic->programs[i]->stream_index[j] == s)
2917 return ic->programs[i];
2923 int av_find_best_stream(AVFormatContext *ic,
2924 enum AVMediaType type,
2925 int wanted_stream_nb,
2927 AVCodec **decoder_ret,
2930 int i, nb_streams = ic->nb_streams;
2931 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2932 unsigned *program = NULL;
2933 AVCodec *decoder = NULL, *best_decoder = NULL;
2935 if (related_stream >= 0 && wanted_stream_nb < 0) {
2936 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2938 program = p->stream_index;
2939 nb_streams = p->nb_stream_indexes;
2942 for (i = 0; i < nb_streams; i++) {
2943 int real_stream_index = program ? program[i] : i;
2944 AVStream *st = ic->streams[real_stream_index];
2945 AVCodecContext *avctx = st->codec;
2946 if (avctx->codec_type != type)
2948 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2950 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2953 decoder = avcodec_find_decoder(st->codec->codec_id);
2956 ret = AVERROR_DECODER_NOT_FOUND;
2960 if (best_count >= st->codec_info_nb_frames)
2962 best_count = st->codec_info_nb_frames;
2963 ret = real_stream_index;
2964 best_decoder = decoder;
2965 if (program && i == nb_streams - 1 && ret < 0) {
2967 nb_streams = ic->nb_streams;
2968 i = 0; /* no related stream found, try again with everything */
2972 *decoder_ret = best_decoder;
2976 /*******************************************************/
2978 int av_read_play(AVFormatContext *s)
2980 if (s->iformat->read_play)
2981 return s->iformat->read_play(s);
2983 return avio_pause(s->pb, 0);
2984 return AVERROR(ENOSYS);
2987 int av_read_pause(AVFormatContext *s)
2989 if (s->iformat->read_pause)
2990 return s->iformat->read_pause(s);
2992 return avio_pause(s->pb, 1);
2993 return AVERROR(ENOSYS);
2996 void avformat_free_context(AVFormatContext *s)
3002 if (s->iformat && s->iformat->priv_class && s->priv_data)
3003 av_opt_free(s->priv_data);
3005 for(i=0;i<s->nb_streams;i++) {
3006 /* free all data in a stream component */
3009 av_parser_close(st->parser);
3011 if (st->attached_pic.data)
3012 av_free_packet(&st->attached_pic);
3013 av_dict_free(&st->metadata);
3014 av_freep(&st->index_entries);
3015 av_freep(&st->codec->extradata);
3016 av_freep(&st->codec->subtitle_header);
3017 av_freep(&st->codec);
3018 av_freep(&st->priv_data);
3019 av_freep(&st->info);
3022 for(i=s->nb_programs-1; i>=0; i--) {
3023 av_dict_free(&s->programs[i]->metadata);
3024 av_freep(&s->programs[i]->stream_index);
3025 av_freep(&s->programs[i]);
3027 av_freep(&s->programs);
3028 av_freep(&s->priv_data);
3029 while(s->nb_chapters--) {
3030 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3031 av_freep(&s->chapters[s->nb_chapters]);
3033 av_freep(&s->chapters);
3034 av_dict_free(&s->metadata);
3035 av_freep(&s->streams);
3039 #if FF_API_CLOSE_INPUT_FILE
3040 void av_close_input_file(AVFormatContext *s)
3042 avformat_close_input(&s);
3046 void avformat_close_input(AVFormatContext **ps)
3048 AVFormatContext *s = *ps;
3049 AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
3051 flush_packet_queue(s);
3052 if (s->iformat && (s->iformat->read_close))
3053 s->iformat->read_close(s);
3054 avformat_free_context(s);
3060 #if FF_API_NEW_STREAM
3061 AVStream *av_new_stream(AVFormatContext *s, int id)
3063 AVStream *st = avformat_new_stream(s, NULL);
3070 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
3076 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3078 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
3081 s->streams = streams;
3083 st = av_mallocz(sizeof(AVStream));
3086 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3090 st->info->last_dts = AV_NOPTS_VALUE;
3092 st->codec = avcodec_alloc_context3(c);
3094 /* no default bitrate if decoding */
3095 st->codec->bit_rate = 0;
3097 st->index = s->nb_streams;
3098 st->start_time = AV_NOPTS_VALUE;
3099 st->duration = AV_NOPTS_VALUE;
3100 /* we set the current DTS to 0 so that formats without any timestamps
3101 but durations get some timestamps, formats with some unknown
3102 timestamps have their first few packets buffered and the
3103 timestamps corrected before they are returned to the user */
3104 st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0;
3105 st->first_dts = AV_NOPTS_VALUE;
3106 st->probe_packets = MAX_PROBE_PACKETS;
3108 /* default pts setting is MPEG-like */
3109 avpriv_set_pts_info(st, 33, 1, 90000);
3110 st->last_IP_pts = AV_NOPTS_VALUE;
3111 for(i=0; i<MAX_REORDER_DELAY+1; i++)
3112 st->pts_buffer[i]= AV_NOPTS_VALUE;
3113 st->reference_dts = AV_NOPTS_VALUE;
3115 st->sample_aspect_ratio = (AVRational){0,1};
3117 #if FF_API_R_FRAME_RATE
3118 st->info->last_dts = AV_NOPTS_VALUE;
3120 st->info->fps_first_dts = AV_NOPTS_VALUE;
3121 st->info->fps_last_dts = AV_NOPTS_VALUE;
3123 s->streams[s->nb_streams++] = st;
3127 AVProgram *av_new_program(AVFormatContext *ac, int id)
3129 AVProgram *program=NULL;
3132 av_dlog(ac, "new_program: id=0x%04x\n", id);
3134 for(i=0; i<ac->nb_programs; i++)
3135 if(ac->programs[i]->id == id)
3136 program = ac->programs[i];
3139 program = av_mallocz(sizeof(AVProgram));
3142 dynarray_add(&ac->programs, &ac->nb_programs, program);
3143 program->discard = AVDISCARD_NONE;
3150 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
3152 AVChapter *chapter = NULL;
3155 for(i=0; i<s->nb_chapters; i++)
3156 if(s->chapters[i]->id == id)
3157 chapter = s->chapters[i];
3160 chapter= av_mallocz(sizeof(AVChapter));
3163 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3165 av_dict_set(&chapter->metadata, "title", title, 0);
3167 chapter->time_base= time_base;
3168 chapter->start = start;
3174 /************************************************************/
3175 /* output media file */
3177 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
3178 const char *format, const char *filename)
3180 AVFormatContext *s = avformat_alloc_context();
3189 oformat = av_guess_format(format, NULL, NULL);
3191 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
3192 ret = AVERROR(EINVAL);
3196 oformat = av_guess_format(NULL, filename, NULL);
3198 ret = AVERROR(EINVAL);
3199 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
3206 s->oformat = oformat;
3207 if (s->oformat->priv_data_size > 0) {
3208 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3211 if (s->oformat->priv_class) {
3212 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3213 av_opt_set_defaults(s->priv_data);
3216 s->priv_data = NULL;
3219 av_strlcpy(s->filename, filename, sizeof(s->filename));
3223 av_log(s, AV_LOG_ERROR, "Out of memory\n");
3224 ret = AVERROR(ENOMEM);
3226 avformat_free_context(s);
3230 #if FF_API_ALLOC_OUTPUT_CONTEXT
3231 AVFormatContext *avformat_alloc_output_context(const char *format,
3232 AVOutputFormat *oformat, const char *filename)
3234 AVFormatContext *avctx;
3235 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
3236 return ret < 0 ? NULL : avctx;
3240 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
3242 const AVCodecTag *avctag;
3244 enum AVCodecID id = AV_CODEC_ID_NONE;
3245 unsigned int tag = 0;
3248 * Check that tag + id is in the table
3249 * If neither is in the table -> OK
3250 * If tag is in the table with another id -> FAIL
3251 * If id is in the table with another tag -> FAIL unless strict < normal
3253 for (n = 0; s->oformat->codec_tag[n]; n++) {
3254 avctag = s->oformat->codec_tag[n];
3255 while (avctag->id != AV_CODEC_ID_NONE) {
3256 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
3258 if (id == st->codec->codec_id)
3261 if (avctag->id == st->codec->codec_id)
3266 if (id != AV_CODEC_ID_NONE)
3268 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
3273 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
3277 AVDictionary *tmp = NULL;
3280 av_dict_copy(&tmp, *options, 0);
3281 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
3283 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
3284 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3287 // some sanity checks
3288 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
3289 av_log(s, AV_LOG_ERROR, "no streams\n");
3290 ret = AVERROR(EINVAL);
3294 for(i=0;i<s->nb_streams;i++) {
3297 switch (st->codec->codec_type) {
3298 case AVMEDIA_TYPE_AUDIO:
3299 if(st->codec->sample_rate<=0){
3300 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
3301 ret = AVERROR(EINVAL);
3304 if(!st->codec->block_align)
3305 st->codec->block_align = st->codec->channels *
3306 av_get_bits_per_sample(st->codec->codec_id) >> 3;
3308 case AVMEDIA_TYPE_VIDEO:
3309 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
3310 av_log(s, AV_LOG_ERROR, "time base not set\n");
3311 ret = AVERROR(EINVAL);
3314 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
3315 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
3316 ret = AVERROR(EINVAL);
3319 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
3320 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
3322 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
3323 "(%d/%d) and encoder layer (%d/%d)\n",
3324 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3325 st->codec->sample_aspect_ratio.num,
3326 st->codec->sample_aspect_ratio.den);
3327 ret = AVERROR(EINVAL);
3333 if(s->oformat->codec_tag){
3334 if( st->codec->codec_tag
3335 && st->codec->codec_id == AV_CODEC_ID_RAWVIDEO
3336 && (av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 || av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) ==MKTAG('r', 'a', 'w', ' '))
3337 && !validate_codec_tag(s, st)){
3338 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi/mov, we override it here
3339 st->codec->codec_tag= 0;
3341 if(st->codec->codec_tag){
3342 if (!validate_codec_tag(s, st)) {
3343 char tagbuf[32], cortag[32];
3344 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3345 av_get_codec_tag_string(cortag, sizeof(cortag), av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id));
3346 av_log(s, AV_LOG_ERROR,
3347 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
3348 tagbuf, st->codec->codec_tag, st->codec->codec_id, cortag);
3349 ret = AVERROR_INVALIDDATA;
3353 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3356 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3357 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3358 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3361 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3362 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3363 if (!s->priv_data) {
3364 ret = AVERROR(ENOMEM);
3367 if (s->oformat->priv_class) {
3368 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3369 av_opt_set_defaults(s->priv_data);
3370 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3375 /* set muxer identification string */
3376 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3377 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3380 if(s->oformat->write_header){
3381 ret = s->oformat->write_header(s);
3386 /* init PTS generation */
3387 for(i=0;i<s->nb_streams;i++) {
3388 int64_t den = AV_NOPTS_VALUE;
3391 switch (st->codec->codec_type) {
3392 case AVMEDIA_TYPE_AUDIO:
3393 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3395 case AVMEDIA_TYPE_VIDEO:
3396 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3401 if (den != AV_NOPTS_VALUE) {
3403 ret = AVERROR_INVALIDDATA;
3406 frac_init(&st->pts, 0, 0, den);
3411 av_dict_free(options);
3420 //FIXME merge with compute_pkt_fields
3421 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3422 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3423 int num, den, frame_size, i;
3425 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
3426 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
3428 /* duration field */
3429 if (pkt->duration == 0) {
3430 compute_frame_duration(&num, &den, st, NULL, pkt);
3432 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3436 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3439 //XXX/FIXME this is a temporary hack until all encoders output pts
3440 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3443 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
3447 // pkt->pts= st->cur_dts;
3448 pkt->pts= st->pts.val;
3451 //calculate dts from pts
3452 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3453 st->pts_buffer[0]= pkt->pts;
3454 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3455 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3456 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3457 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3459 pkt->dts= st->pts_buffer[0];
3462 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
3463 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
3464 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
3465 av_log(s, AV_LOG_ERROR,
3466 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
3467 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
3468 return AVERROR(EINVAL);
3470 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3471 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
3472 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
3473 return AVERROR(EINVAL);
3476 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n", av_ts2str(pkt->pts), av_ts2str(pkt->dts));
3477 st->cur_dts= pkt->dts;
3478 st->pts.val= pkt->dts;
3481 switch (st->codec->codec_type) {
3482 case AVMEDIA_TYPE_AUDIO:
3483 frame_size = get_audio_frame_size(st->codec, pkt->size, 1);
3485 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3486 likely equal to the encoder delay, but it would be better if we
3487 had the real timestamps from the encoder */
3488 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3489 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3492 case AVMEDIA_TYPE_VIDEO:
3493 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3501 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3506 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3507 return s->oformat->write_packet(s, pkt);
3511 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3513 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3516 ret= s->oformat->write_packet(s, pkt);
3519 s->streams[pkt->stream_index]->nb_frames++;
3523 #define CHUNK_START 0x1000
3525 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3526 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3528 AVPacketList **next_point, *this_pktl;
3529 AVStream *st= s->streams[pkt->stream_index];
3530 int chunked= s->max_chunk_size || s->max_chunk_duration;
3532 this_pktl = av_mallocz(sizeof(AVPacketList));
3534 return AVERROR(ENOMEM);
3535 this_pktl->pkt= *pkt;
3536 pkt->destruct= NULL; // do not free original but only the copy
3537 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3539 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3540 next_point = &(st->last_in_packet_buffer->next);
3542 next_point = &s->packet_buffer;
3547 uint64_t max= av_rescale_q(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base);
3548 if( st->interleaver_chunk_size + pkt->size <= s->max_chunk_size-1U
3549 && st->interleaver_chunk_duration + pkt->duration <= max-1U){
3550 st->interleaver_chunk_size += pkt->size;
3551 st->interleaver_chunk_duration += pkt->duration;
3554 st->interleaver_chunk_size =
3555 st->interleaver_chunk_duration = 0;
3556 this_pktl->pkt.flags |= CHUNK_START;
3560 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3562 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
3563 || !compare(s, &(*next_point)->pkt, pkt))){
3564 next_point= &(*next_point)->next;
3569 next_point = &(s->packet_buffer_end->next);
3572 assert(!*next_point);
3574 s->packet_buffer_end= this_pktl;
3577 this_pktl->next= *next_point;
3579 s->streams[pkt->stream_index]->last_in_packet_buffer=
3580 *next_point= this_pktl;
3584 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3586 AVStream *st = s->streams[ pkt ->stream_index];
3587 AVStream *st2= s->streams[ next->stream_index];
3588 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3590 if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
3591 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
3592 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
3594 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
3595 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
3598 comp= (ts>ts2) - (ts<ts2);
3602 return pkt->stream_index < next->stream_index;
3606 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3607 AVPacket *pkt, int flush)
3610 int stream_count=0, noninterleaved_count=0;
3611 int64_t delta_dts_max = 0;
3615 ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3620 for(i=0; i < s->nb_streams; i++) {
3621 if (s->streams[i]->last_in_packet_buffer) {
3623 } else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3624 ++noninterleaved_count;
3628 if (s->nb_streams == stream_count) {
3631 for(i=0; i < s->nb_streams; i++) {
3632 if (s->streams[i]->last_in_packet_buffer) {
3634 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
3635 s->streams[i]->time_base,
3637 av_rescale_q(s->packet_buffer->pkt.dts,
3638 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
3640 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
3643 if(s->nb_streams == stream_count+noninterleaved_count &&
3644 delta_dts_max > 20*AV_TIME_BASE) {
3645 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
3649 if(stream_count && flush){
3650 pktl= s->packet_buffer;
3653 s->packet_buffer= pktl->next;
3654 if(!s->packet_buffer)
3655 s->packet_buffer_end= NULL;
3657 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3658 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3662 av_init_packet(out);
3667 #if FF_API_INTERLEAVE_PACKET
3668 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
3669 AVPacket *pkt, int flush)
3671 return ff_interleave_packet_per_dts(s, out, pkt, flush);
3676 * Interleave an AVPacket correctly so it can be muxed.
3677 * @param out the interleaved packet will be output here
3678 * @param in the input packet
3679 * @param flush 1 if no further packets are available as input and all
3680 * remaining packets should be output
3681 * @return 1 if a packet was output, 0 if no packet could be output,
3682 * < 0 if an error occurred
3684 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3685 if (s->oformat->interleave_packet) {
3686 int ret = s->oformat->interleave_packet(s, out, in, flush);
3691 return ff_interleave_packet_per_dts(s, out, in, flush);
3694 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3698 AVStream *st= s->streams[ pkt->stream_index];
3700 //FIXME/XXX/HACK drop zero sized packets
3701 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3704 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
3705 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
3706 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3709 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3710 return AVERROR(EINVAL);
3712 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
3718 int ret= interleave_packet(s, &opkt, pkt, flush);
3719 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3722 ret= s->oformat->write_packet(s, &opkt);
3724 s->streams[opkt.stream_index]->nb_frames++;
3726 av_free_packet(&opkt);
3731 if(s->pb && s->pb->error)
3732 return s->pb->error;
3736 int av_write_trailer(AVFormatContext *s)
3742 ret= interleave_packet(s, &pkt, NULL, 1);
3743 if(ret<0) //FIXME cleanup needed for ret<0 ?
3748 ret= s->oformat->write_packet(s, &pkt);
3750 s->streams[pkt.stream_index]->nb_frames++;
3752 av_free_packet(&pkt);
3756 if(s->pb && s->pb->error)
3760 if(s->oformat->write_trailer)
3761 ret = s->oformat->write_trailer(s);
3766 ret = s->pb ? s->pb->error : 0;
3767 for(i=0;i<s->nb_streams;i++) {
3768 av_freep(&s->streams[i]->priv_data);
3769 av_freep(&s->streams[i]->index_entries);
3771 if (s->oformat->priv_class)
3772 av_opt_free(s->priv_data);
3773 av_freep(&s->priv_data);
3777 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3778 int64_t *dts, int64_t *wall)
3780 if (!s->oformat || !s->oformat->get_output_timestamp)
3781 return AVERROR(ENOSYS);
3782 s->oformat->get_output_timestamp(s, stream, dts, wall);
3786 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3789 AVProgram *program=NULL;
3792 if (idx >= ac->nb_streams) {
3793 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3797 for(i=0; i<ac->nb_programs; i++){
3798 if(ac->programs[i]->id != progid)
3800 program = ac->programs[i];
3801 for(j=0; j<program->nb_stream_indexes; j++)
3802 if(program->stream_index[j] == idx)
3805 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3808 program->stream_index = tmp;
3809 program->stream_index[program->nb_stream_indexes++] = idx;
3814 static void print_fps(double d, const char *postfix){
3815 uint64_t v= lrintf(d*100);
3816 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3817 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3818 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3821 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3823 if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){
3824 AVDictionaryEntry *tag=NULL;
3826 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3827 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3828 if(strcmp("language", tag->key)){
3829 const char *p = tag->value;
3830 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3833 size_t len = strcspn(p, "\x8\xa\xb\xc\xd");
3834 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3835 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3837 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3838 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3841 av_log(ctx, AV_LOG_INFO, "\n");
3847 /* "user interface" functions */
3848 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3851 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3852 AVStream *st = ic->streams[i];
3853 int g = av_gcd(st->time_base.num, st->time_base.den);
3854 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3855 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3856 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3857 /* the pid is an important information, so we display it */
3858 /* XXX: add a generic system */
3859 if (flags & AVFMT_SHOW_IDS)
3860 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3862 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3863 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3864 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3865 if (st->sample_aspect_ratio.num && // default
3866 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3867 AVRational display_aspect_ratio;
3868 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3869 st->codec->width*st->sample_aspect_ratio.num,
3870 st->codec->height*st->sample_aspect_ratio.den,
3872 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3873 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3874 display_aspect_ratio.num, display_aspect_ratio.den);
3876 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3877 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3878 print_fps(av_q2d(st->avg_frame_rate), "fps");
3879 #if FF_API_R_FRAME_RATE
3880 if(st->r_frame_rate.den && st->r_frame_rate.num)
3881 print_fps(av_q2d(st->r_frame_rate), "tbr");
3883 if(st->time_base.den && st->time_base.num)
3884 print_fps(1/av_q2d(st->time_base), "tbn");
3885 if(st->codec->time_base.den && st->codec->time_base.num)
3886 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3888 if (st->disposition & AV_DISPOSITION_DEFAULT)
3889 av_log(NULL, AV_LOG_INFO, " (default)");
3890 if (st->disposition & AV_DISPOSITION_DUB)
3891 av_log(NULL, AV_LOG_INFO, " (dub)");
3892 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3893 av_log(NULL, AV_LOG_INFO, " (original)");
3894 if (st->disposition & AV_DISPOSITION_COMMENT)
3895 av_log(NULL, AV_LOG_INFO, " (comment)");
3896 if (st->disposition & AV_DISPOSITION_LYRICS)
3897 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3898 if (st->disposition & AV_DISPOSITION_KARAOKE)
3899 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3900 if (st->disposition & AV_DISPOSITION_FORCED)
3901 av_log(NULL, AV_LOG_INFO, " (forced)");
3902 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3903 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3904 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3905 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3906 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3907 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3908 av_log(NULL, AV_LOG_INFO, "\n");
3909 dump_metadata(NULL, st->metadata, " ");
3912 void av_dump_format(AVFormatContext *ic,
3918 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3919 if (ic->nb_streams && !printed)
3922 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3923 is_output ? "Output" : "Input",
3925 is_output ? ic->oformat->name : ic->iformat->name,
3926 is_output ? "to" : "from", url);
3927 dump_metadata(NULL, ic->metadata, " ");
3929 av_log(NULL, AV_LOG_INFO, " Duration: ");
3930 if (ic->duration != AV_NOPTS_VALUE) {
3931 int hours, mins, secs, us;
3932 secs = ic->duration / AV_TIME_BASE;
3933 us = ic->duration % AV_TIME_BASE;
3938 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3939 (100 * us) / AV_TIME_BASE);
3941 av_log(NULL, AV_LOG_INFO, "N/A");
3943 if (ic->start_time != AV_NOPTS_VALUE) {
3945 av_log(NULL, AV_LOG_INFO, ", start: ");
3946 secs = ic->start_time / AV_TIME_BASE;
3947 us = abs(ic->start_time % AV_TIME_BASE);
3948 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3949 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3951 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3953 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3955 av_log(NULL, AV_LOG_INFO, "N/A");
3957 av_log(NULL, AV_LOG_INFO, "\n");
3959 for (i = 0; i < ic->nb_chapters; i++) {
3960 AVChapter *ch = ic->chapters[i];
3961 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3962 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3963 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3965 dump_metadata(NULL, ch->metadata, " ");
3967 if(ic->nb_programs) {
3968 int j, k, total = 0;
3969 for(j=0; j<ic->nb_programs; j++) {
3970 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3972 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3973 name ? name->value : "");
3974 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3975 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3976 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3977 printed[ic->programs[j]->stream_index[k]] = 1;
3979 total += ic->programs[j]->nb_stream_indexes;
3981 if (total < ic->nb_streams)
3982 av_log(NULL, AV_LOG_INFO, " No Program\n");
3984 for(i=0;i<ic->nb_streams;i++)
3986 dump_stream_format(ic, i, index, is_output);
3991 #if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER
3992 FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54")
3994 return av_gettime();
3998 uint64_t ff_ntp_time(void)
4000 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
4003 int av_get_frame_filename(char *buf, int buf_size,
4004 const char *path, int number)
4007 char *q, buf1[20], c;
4008 int nd, len, percentd_found;
4020 while (isdigit(*p)) {
4021 nd = nd * 10 + *p++ - '0';
4024 } while (isdigit(c));
4033 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4035 if ((q - buf + len) > buf_size - 1)
4037 memcpy(q, buf1, len);
4045 if ((q - buf) < buf_size - 1)
4049 if (!percentd_found)
4058 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
4062 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
4064 for(i=0;i<size;i+=16) {
4071 PRINT(" %02x", buf[i+j]);
4076 for(j=0;j<len;j++) {
4078 if (c < ' ' || c > '~')
4087 void av_hex_dump(FILE *f, uint8_t *buf, int size)
4089 hex_dump_internal(NULL, f, 0, buf, size);
4092 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
4094 hex_dump_internal(avcl, NULL, level, buf, size);
4097 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
4100 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
4101 PRINT("stream #%d:\n", pkt->stream_index);
4102 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
4103 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
4104 /* DTS is _always_ valid after av_read_frame() */
4106 if (pkt->dts == AV_NOPTS_VALUE)
4109 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
4110 /* PTS may not be known if B-frames are present. */
4112 if (pkt->pts == AV_NOPTS_VALUE)
4115 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
4117 PRINT(" size=%d\n", pkt->size);
4120 av_hex_dump(f, pkt->data, pkt->size);
4124 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
4126 AVRational tb = { 1, AV_TIME_BASE };
4127 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
4131 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
4133 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
4137 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
4139 AVRational tb = { 1, AV_TIME_BASE };
4140 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
4144 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
4147 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
4150 void av_url_split(char *proto, int proto_size,
4151 char *authorization, int authorization_size,
4152 char *hostname, int hostname_size,
4154 char *path, int path_size,
4157 const char *p, *ls, *ls2, *at, *col, *brk;
4159 if (port_ptr) *port_ptr = -1;
4160 if (proto_size > 0) proto[0] = 0;
4161 if (authorization_size > 0) authorization[0] = 0;
4162 if (hostname_size > 0) hostname[0] = 0;
4163 if (path_size > 0) path[0] = 0;
4165 /* parse protocol */
4166 if ((p = strchr(url, ':'))) {
4167 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4172 /* no protocol means plain filename */
4173 av_strlcpy(path, url, path_size);
4177 /* separate path from hostname */
4178 ls = strchr(p, '/');
4179 ls2 = strchr(p, '?');
4183 ls = FFMIN(ls, ls2);
4185 av_strlcpy(path, ls, path_size);
4187 ls = &p[strlen(p)]; // XXX
4189 /* the rest is hostname, use that to parse auth/port */
4191 /* authorization (user[:pass]@hostname) */
4192 if ((at = strchr(p, '@')) && at < ls) {
4193 av_strlcpy(authorization, p,
4194 FFMIN(authorization_size, at + 1 - p));
4195 p = at + 1; /* skip '@' */
4198 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4200 av_strlcpy(hostname, p + 1,
4201 FFMIN(hostname_size, brk - p));
4202 if (brk[1] == ':' && port_ptr)
4203 *port_ptr = atoi(brk + 2);
4204 } else if ((col = strchr(p, ':')) && col < ls) {
4205 av_strlcpy(hostname, p,
4206 FFMIN(col + 1 - p, hostname_size));
4207 if (port_ptr) *port_ptr = atoi(col + 1);
4209 av_strlcpy(hostname, p,
4210 FFMIN(ls + 1 - p, hostname_size));
4214 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4217 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4220 'C', 'D', 'E', 'F' };
4221 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4224 'c', 'd', 'e', 'f' };
4225 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4227 for(i = 0; i < s; i++) {
4228 buff[i * 2] = hex_table[src[i] >> 4];
4229 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4235 int ff_hex_to_data(uint8_t *data, const char *p)
4242 p += strspn(p, SPACE_CHARS);
4245 c = toupper((unsigned char) *p++);
4246 if (c >= '0' && c <= '9')
4248 else if (c >= 'A' && c <= 'F')
4263 #if FF_API_SET_PTS_INFO
4264 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
4265 unsigned int pts_num, unsigned int pts_den)
4267 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
4271 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4272 unsigned int pts_num, unsigned int pts_den)
4275 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
4276 if(new_tb.num != pts_num)
4277 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
4279 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
4281 if(new_tb.num <= 0 || new_tb.den <= 0) {
4282 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);
4285 s->time_base = new_tb;
4286 av_codec_set_pkt_timebase(s->codec, new_tb);
4287 s->pts_wrap_bits = pts_wrap_bits;
4290 int ff_url_join(char *str, int size, const char *proto,
4291 const char *authorization, const char *hostname,
4292 int port, const char *fmt, ...)
4295 struct addrinfo hints = { 0 }, *ai;
4300 av_strlcatf(str, size, "%s://", proto);
4301 if (authorization && authorization[0])
4302 av_strlcatf(str, size, "%s@", authorization);
4303 #if CONFIG_NETWORK && defined(AF_INET6)
4304 /* Determine if hostname is a numerical IPv6 address,
4305 * properly escape it within [] in that case. */
4306 hints.ai_flags = AI_NUMERICHOST;
4307 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
4308 if (ai->ai_family == AF_INET6) {
4309 av_strlcat(str, "[", size);
4310 av_strlcat(str, hostname, size);
4311 av_strlcat(str, "]", size);
4313 av_strlcat(str, hostname, size);
4318 /* Not an IPv6 address, just output the plain string. */
4319 av_strlcat(str, hostname, size);
4322 av_strlcatf(str, size, ":%d", port);
4325 int len = strlen(str);
4328 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
4334 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
4335 AVFormatContext *src)
4340 local_pkt.stream_index = dst_stream;
4341 if (pkt->pts != AV_NOPTS_VALUE)
4342 local_pkt.pts = av_rescale_q(pkt->pts,
4343 src->streams[pkt->stream_index]->time_base,
4344 dst->streams[dst_stream]->time_base);
4345 if (pkt->dts != AV_NOPTS_VALUE)
4346 local_pkt.dts = av_rescale_q(pkt->dts,
4347 src->streams[pkt->stream_index]->time_base,
4348 dst->streams[dst_stream]->time_base);
4349 return av_write_frame(dst, &local_pkt);
4352 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4355 const char *ptr = str;
4357 /* Parse key=value pairs. */
4360 char *dest = NULL, *dest_end;
4361 int key_len, dest_len = 0;
4363 /* Skip whitespace and potential commas. */
4364 while (*ptr && (isspace(*ptr) || *ptr == ','))
4371 if (!(ptr = strchr(key, '=')))
4374 key_len = ptr - key;
4376 callback_get_buf(context, key, key_len, &dest, &dest_len);
4377 dest_end = dest + dest_len - 1;
4381 while (*ptr && *ptr != '\"') {
4385 if (dest && dest < dest_end)
4389 if (dest && dest < dest_end)
4397 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
4398 if (dest && dest < dest_end)
4406 int ff_find_stream_index(AVFormatContext *s, int id)
4409 for (i = 0; i < s->nb_streams; i++) {
4410 if (s->streams[i]->id == id)
4416 void ff_make_absolute_url(char *buf, int size, const char *base,
4420 /* Absolute path, relative to the current server */
4421 if (base && strstr(base, "://") && rel[0] == '/') {
4423 av_strlcpy(buf, base, size);
4424 sep = strstr(buf, "://");
4427 sep = strchr(sep, '/');
4431 av_strlcat(buf, rel, size);
4434 /* If rel actually is an absolute url, just copy it */
4435 if (!base || strstr(rel, "://") || rel[0] == '/') {
4436 av_strlcpy(buf, rel, size);
4440 av_strlcpy(buf, base, size);
4441 /* Remove the file name from the base url */
4442 sep = strrchr(buf, '/');
4447 while (av_strstart(rel, "../", NULL) && sep) {
4448 /* Remove the path delimiter at the end */
4450 sep = strrchr(buf, '/');
4451 /* If the next directory name to pop off is "..", break here */
4452 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4453 /* Readd the slash we just removed */
4454 av_strlcat(buf, "/", size);
4457 /* Cut off the directory name */
4464 av_strlcat(buf, rel, size);
4467 int64_t ff_iso8601_to_unix_time(const char *datestr)
4470 struct tm time1 = {0}, time2 = {0};
4472 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
4473 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
4475 return av_timegm(&time2);
4477 return av_timegm(&time1);
4479 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4480 "the date string.\n");
4485 int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
4488 if (ofmt->query_codec)
4489 return ofmt->query_codec(codec_id, std_compliance);
4490 else if (ofmt->codec_tag)
4491 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4492 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4493 codec_id == ofmt->subtitle_codec)
4496 return AVERROR_PATCHWELCOME;
4499 int avformat_network_init(void)
4503 ff_network_inited_globally = 1;
4504 if ((ret = ff_network_init()) < 0)
4511 int avformat_network_deinit(void)
4520 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4521 uint64_t channel_layout, int32_t sample_rate,
4522 int32_t width, int32_t height)
4528 return AVERROR(EINVAL);
4531 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4533 if (channel_layout) {
4535 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4539 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4541 if (width || height) {
4543 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4545 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4547 return AVERROR(ENOMEM);
4548 bytestream_put_le32(&data, flags);
4550 bytestream_put_le32(&data, channels);
4552 bytestream_put_le64(&data, channel_layout);
4554 bytestream_put_le32(&data, sample_rate);
4555 if (width || height) {
4556 bytestream_put_le32(&data, width);
4557 bytestream_put_le32(&data, height);
4562 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4564 return ff_codec_bmp_tags;
4566 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4568 return ff_codec_wav_tags;
4571 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4573 AVRational undef = {0, 1};
4574 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4575 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4576 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4578 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4579 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4580 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4581 stream_sample_aspect_ratio = undef;
4583 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4584 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4585 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4586 frame_sample_aspect_ratio = undef;
4588 if (stream_sample_aspect_ratio.num)
4589 return stream_sample_aspect_ratio;
4591 return frame_sample_aspect_ratio;
4594 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4597 if (*spec <= '9' && *spec >= '0') /* opt:index */
4598 return strtol(spec, NULL, 0) == st->index;
4599 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4600 *spec == 't') { /* opt:[vasdt] */
4601 enum AVMediaType type;
4604 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4605 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4606 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4607 case 'd': type = AVMEDIA_TYPE_DATA; break;
4608 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4609 default: av_assert0(0);
4611 if (type != st->codec->codec_type)
4613 if (*spec++ == ':') { /* possibly followed by :index */
4614 int i, index = strtol(spec, NULL, 0);
4615 for (i = 0; i < s->nb_streams; i++)
4616 if (s->streams[i]->codec->codec_type == type && index-- == 0)
4617 return i == st->index;
4621 } else if (*spec == 'p' && *(spec + 1) == ':') {
4625 prog_id = strtol(spec, &endptr, 0);
4626 for (i = 0; i < s->nb_programs; i++) {
4627 if (s->programs[i]->id != prog_id)
4630 if (*endptr++ == ':') {
4631 int stream_idx = strtol(endptr, NULL, 0);
4632 return stream_idx >= 0 &&
4633 stream_idx < s->programs[i]->nb_stream_indexes &&
4634 st->index == s->programs[i]->stream_index[stream_idx];
4637 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4638 if (st->index == s->programs[i]->stream_index[j])
4642 } else if (*spec == '#') {
4645 sid = strtol(spec + 1, &endptr, 0);
4647 return st->id == sid;
4648 } else if (!*spec) /* empty specifier, matches everything */
4651 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4652 return AVERROR(EINVAL);