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"
41 #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 /* fraction handling */
78 * f = val + (num / den) + 0.5.
80 * 'num' is normalized so that it is such as 0 <= num < den.
82 * @param f fractional number
83 * @param val integer value
84 * @param num must be >= 0
85 * @param den must be >= 1
87 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
100 * Fractional addition to f: f = f + (incr / f->den).
102 * @param f fractional number
103 * @param incr increment, can be positive or negative
105 static void frac_add(AVFrac *f, int64_t incr)
118 } else if (num >= den) {
125 /** head of registered input format linked list */
126 static AVInputFormat *first_iformat = NULL;
127 /** head of registered output format linked list */
128 static AVOutputFormat *first_oformat = NULL;
130 AVInputFormat *av_iformat_next(AVInputFormat *f)
132 if(f) return f->next;
133 else return first_iformat;
136 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
138 if(f) return f->next;
139 else return first_oformat;
142 void av_register_input_format(AVInputFormat *format)
146 while (*p != NULL) p = &(*p)->next;
151 void av_register_output_format(AVOutputFormat *format)
155 while (*p != NULL) p = &(*p)->next;
160 int av_match_ext(const char *filename, const char *extensions)
168 ext = strrchr(filename, '.');
174 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
177 if (!av_strcasecmp(ext1, ext))
187 static int match_format(const char *name, const char *names)
195 namelen = strlen(name);
196 while ((p = strchr(names, ','))) {
197 len = FFMAX(p - names, namelen);
198 if (!av_strncasecmp(name, names, len))
202 return !av_strcasecmp(name, names);
205 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
206 const char *mime_type)
208 AVOutputFormat *fmt = NULL, *fmt_found;
209 int score_max, score;
211 /* specific test for image sequences */
212 #if CONFIG_IMAGE2_MUXER
213 if (!short_name && filename &&
214 av_filename_number_test(filename) &&
215 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
216 return av_guess_format("image2", NULL, NULL);
219 /* Find the proper file type. */
222 while ((fmt = av_oformat_next(fmt))) {
224 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
226 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
228 if (filename && fmt->extensions &&
229 av_match_ext(filename, fmt->extensions)) {
232 if (score > score_max) {
240 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
241 const char *filename, const char *mime_type, enum AVMediaType type){
242 if(type == AVMEDIA_TYPE_VIDEO){
243 enum CodecID codec_id= CODEC_ID_NONE;
245 #if CONFIG_IMAGE2_MUXER
246 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
247 codec_id= ff_guess_image2_codec(filename);
250 if(codec_id == CODEC_ID_NONE)
251 codec_id= fmt->video_codec;
253 }else if(type == AVMEDIA_TYPE_AUDIO)
254 return fmt->audio_codec;
255 else if (type == AVMEDIA_TYPE_SUBTITLE)
256 return fmt->subtitle_codec;
258 return CODEC_ID_NONE;
261 AVInputFormat *av_find_input_format(const char *short_name)
263 AVInputFormat *fmt = NULL;
264 while ((fmt = av_iformat_next(fmt))) {
265 if (match_format(short_name, fmt->name))
271 int ffio_limit(AVIOContext *s, int size)
274 int64_t remaining= s->maxsize - avio_tell(s);
275 if(remaining < size){
276 int64_t newsize= avio_size(s);
277 if(!s->maxsize || s->maxsize<newsize)
278 s->maxsize= newsize - !newsize;
279 remaining= s->maxsize - avio_tell(s);
280 remaining= FFMAX(remaining, 0);
283 if(s->maxsize>=0 && remaining+1 < size){
284 av_log(0, AV_LOG_ERROR, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
291 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
294 size= ffio_limit(s, size);
296 ret= av_new_packet(pkt, size);
301 pkt->pos= avio_tell(s);
303 ret= avio_read(s, pkt->data, size);
307 av_shrink_packet(pkt, ret);
312 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
317 return av_get_packet(s, pkt, size);
318 old_size = pkt->size;
319 ret = av_grow_packet(pkt, size);
322 ret = avio_read(s, pkt->data + old_size, size);
323 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
328 int av_filename_number_test(const char *filename)
331 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
334 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
336 AVProbeData lpd = *pd;
337 AVInputFormat *fmt1 = NULL, *fmt;
338 int score, nodat = 0, score_max=0;
340 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
341 int id3len = ff_id3v2_tag_len(lpd.buf);
342 if (lpd.buf_size > id3len + 16) {
344 lpd.buf_size -= id3len;
350 while ((fmt1 = av_iformat_next(fmt1))) {
351 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
354 if (fmt1->read_probe) {
355 score = fmt1->read_probe(&lpd);
356 if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
357 score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1);
358 } else if (fmt1->extensions) {
359 if (av_match_ext(lpd.filename, fmt1->extensions)) {
363 if (score > score_max) {
366 }else if (score == score_max)
369 *score_ret= score_max;
374 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
377 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
378 if(score_ret > *score_max){
379 *score_max= score_ret;
385 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
387 return av_probe_input_format2(pd, is_opened, &score);
390 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
392 static const struct {
393 const char *name; enum CodecID id; enum AVMediaType type;
395 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
396 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
397 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
398 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
399 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
400 { "loas" , CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
401 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
402 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
403 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
407 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
411 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
412 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
413 for (i = 0; fmt_id_type[i].name; i++) {
414 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
415 st->codec->codec_id = fmt_id_type[i].id;
416 st->codec->codec_type = fmt_id_type[i].type;
424 /************************************************************/
425 /* input media file */
427 int av_demuxer_open(AVFormatContext *ic){
430 if (ic->iformat->read_header) {
431 err = ic->iformat->read_header(ic);
436 if (ic->pb && !ic->data_offset)
437 ic->data_offset = avio_tell(ic->pb);
443 /** size of probe buffer, for guessing file type from file contents */
444 #define PROBE_BUF_MIN 2048
445 #define PROBE_BUF_MAX (1<<20)
447 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
448 const char *filename, void *logctx,
449 unsigned int offset, unsigned int max_probe_size)
451 AVProbeData pd = { filename ? filename : "", NULL, -offset };
452 unsigned char *buf = NULL;
453 int ret = 0, probe_size;
455 if (!max_probe_size) {
456 max_probe_size = PROBE_BUF_MAX;
457 } else if (max_probe_size > PROBE_BUF_MAX) {
458 max_probe_size = PROBE_BUF_MAX;
459 } else if (max_probe_size < PROBE_BUF_MIN) {
460 return AVERROR(EINVAL);
463 if (offset >= max_probe_size) {
464 return AVERROR(EINVAL);
467 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
468 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
469 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
470 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
473 if (probe_size < offset) {
477 /* read probe data */
478 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
481 return AVERROR(ENOMEM);
484 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
485 /* fail if error was not end of file, otherwise, lower score */
486 if (ret != AVERROR_EOF) {
491 ret = 0; /* error was end of file, nothing read */
494 pd.buf = &buf[offset];
496 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
498 /* guess file format */
499 *fmt = av_probe_input_format2(&pd, 1, &score);
501 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
502 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
504 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
510 return AVERROR_INVALIDDATA;
513 /* rewind. reuse probe buffer to avoid seeking */
514 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
520 /* open input file and probe the format if necessary */
521 static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options)
524 AVProbeData pd = {filename, NULL, 0};
527 s->flags |= AVFMT_FLAG_CUSTOM_IO;
529 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
530 else if (s->iformat->flags & AVFMT_NOFILE)
531 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
532 "will be ignored with AVFMT_NOFILE format.\n");
536 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
537 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
540 if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ,
541 &s->interrupt_callback, options)) < 0)
545 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
548 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
550 AVFormatContext *s = *ps;
552 AVDictionary *tmp = NULL;
554 if (!s && !(s = avformat_alloc_context()))
555 return AVERROR(ENOMEM);
560 av_dict_copy(&tmp, *options, 0);
562 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
565 if ((ret = init_input(s, filename, &tmp)) < 0)
568 /* check filename in case an image number is expected */
569 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
570 if (!av_filename_number_test(filename)) {
571 ret = AVERROR(EINVAL);
576 s->duration = s->start_time = AV_NOPTS_VALUE;
577 av_strlcpy(s->filename, filename, sizeof(s->filename));
579 /* allocate private data */
580 if (s->iformat->priv_data_size > 0) {
581 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
582 ret = AVERROR(ENOMEM);
585 if (s->iformat->priv_class) {
586 *(const AVClass**)s->priv_data = s->iformat->priv_class;
587 av_opt_set_defaults(s->priv_data);
588 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
593 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
595 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
597 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
598 if ((ret = s->iformat->read_header(s)) < 0)
601 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
602 s->data_offset = avio_tell(s->pb);
604 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
607 av_dict_free(options);
615 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
617 avformat_free_context(s);
622 /*******************************************************/
624 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
625 AVPacketList **plast_pktl){
626 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
631 (*plast_pktl)->next = pktl;
633 *packet_buffer = pktl;
635 /* add the packet in the buffered packet list */
641 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
647 AVPacketList *pktl = s->raw_packet_buffer;
651 if(s->streams[pkt->stream_index]->request_probe <= 0){
652 s->raw_packet_buffer = pktl->next;
653 s->raw_packet_buffer_remaining_size += pkt->size;
660 ret= s->iformat->read_packet(s, pkt);
662 if (!pktl || ret == AVERROR(EAGAIN))
664 for (i = 0; i < s->nb_streams; i++)
665 if(s->streams[i]->request_probe > 0)
666 s->streams[i]->request_probe = -1;
670 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
671 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
672 av_log(s, AV_LOG_WARNING,
673 "Dropped corrupted packet (stream = %d)\n",
679 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
680 av_packet_merge_side_data(pkt);
682 if(pkt->stream_index >= (unsigned)s->nb_streams){
683 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
687 st= s->streams[pkt->stream_index];
689 switch(st->codec->codec_type){
690 case AVMEDIA_TYPE_VIDEO:
691 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
693 case AVMEDIA_TYPE_AUDIO:
694 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
696 case AVMEDIA_TYPE_SUBTITLE:
697 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
701 if(!pktl && st->request_probe <= 0)
704 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
705 s->raw_packet_buffer_remaining_size -= pkt->size;
707 if(st->request_probe>0){
708 AVProbeData *pd = &st->probe_data;
710 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
713 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
714 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
715 pd->buf_size += pkt->size;
716 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
718 end= s->raw_packet_buffer_remaining_size <= 0
719 || st->probe_packets<=0;
721 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
722 int score= set_codec_from_probe_data(s, st, pd);
723 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
727 st->request_probe= -1;
728 if(st->codec->codec_id != CODEC_ID_NONE){
729 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
731 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
738 /**********************************************************/
741 * Get the number of samples of an audio frame. Return -1 on error.
743 static int get_audio_frame_size(AVCodecContext *enc, int size)
747 if(enc->codec_id == CODEC_ID_VORBIS)
750 if (enc->frame_size <= 1) {
751 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
753 if (bits_per_sample) {
754 if (enc->channels == 0)
756 frame_size = (size << 3) / (bits_per_sample * enc->channels);
758 /* used for example by ADPCM codecs */
759 if (enc->bit_rate == 0)
761 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
764 frame_size = enc->frame_size;
771 * Return the frame duration in seconds. Return 0 if not available.
773 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
774 AVCodecParserContext *pc, AVPacket *pkt)
780 switch(st->codec->codec_type) {
781 case AVMEDIA_TYPE_VIDEO:
782 if (st->r_frame_rate.num && !pc) {
783 *pnum = st->r_frame_rate.den;
784 *pden = st->r_frame_rate.num;
785 } else if(st->time_base.num*1000LL > st->time_base.den) {
786 *pnum = st->time_base.num;
787 *pden = st->time_base.den;
788 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
789 *pnum = st->codec->time_base.num;
790 *pden = st->codec->time_base.den;
791 if (pc && pc->repeat_pict) {
792 *pnum = (*pnum) * (1 + pc->repeat_pict);
794 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
795 //Thus if we have no parser in such case leave duration undefined.
796 if(st->codec->ticks_per_frame>1 && !pc){
801 case AVMEDIA_TYPE_AUDIO:
802 frame_size = get_audio_frame_size(st->codec, pkt->size);
803 if (frame_size <= 0 || st->codec->sample_rate <= 0)
806 *pden = st->codec->sample_rate;
813 static int is_intra_only(AVCodecContext *enc){
814 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
816 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
817 switch(enc->codec_id){
819 case CODEC_ID_MJPEGB:
821 case CODEC_ID_PRORES:
822 case CODEC_ID_RAWVIDEO:
823 case CODEC_ID_DVVIDEO:
824 case CODEC_ID_HUFFYUV:
825 case CODEC_ID_FFVHUFF:
830 case CODEC_ID_JPEG2000:
838 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
839 int64_t dts, int64_t pts)
841 AVStream *st= s->streams[stream_index];
842 AVPacketList *pktl= s->packet_buffer;
844 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
847 st->first_dts= dts - st->cur_dts;
850 for(; pktl; pktl= pktl->next){
851 if(pktl->pkt.stream_index != stream_index)
853 //FIXME think more about this check
854 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
855 pktl->pkt.pts += st->first_dts;
857 if(pktl->pkt.dts != AV_NOPTS_VALUE)
858 pktl->pkt.dts += st->first_dts;
860 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
861 st->start_time= pktl->pkt.pts;
863 if (st->start_time == AV_NOPTS_VALUE)
864 st->start_time = pts;
867 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
869 AVPacketList *pktl= s->packet_buffer;
872 if(st->first_dts != AV_NOPTS_VALUE){
873 cur_dts= st->first_dts;
874 for(; pktl; pktl= pktl->next){
875 if(pktl->pkt.stream_index == pkt->stream_index){
876 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
878 cur_dts -= pkt->duration;
881 pktl= s->packet_buffer;
882 st->first_dts = cur_dts;
883 }else if(st->cur_dts)
886 for(; pktl; pktl= pktl->next){
887 if(pktl->pkt.stream_index != pkt->stream_index)
889 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
890 && !pktl->pkt.duration){
891 pktl->pkt.dts= cur_dts;
892 if(!st->codec->has_b_frames)
893 pktl->pkt.pts= cur_dts;
894 cur_dts += pkt->duration;
895 pktl->pkt.duration= pkt->duration;
899 if(st->first_dts == AV_NOPTS_VALUE)
900 st->cur_dts= cur_dts;
903 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
904 AVCodecParserContext *pc, AVPacket *pkt)
906 int num, den, presentation_delayed, delay, i;
909 if (s->flags & AVFMT_FLAG_NOFILLIN)
912 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
913 pkt->dts= AV_NOPTS_VALUE;
915 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
916 //FIXME Set low_delay = 0 when has_b_frames = 1
917 st->codec->has_b_frames = 1;
919 /* do we have a video B-frame ? */
920 delay= st->codec->has_b_frames;
921 presentation_delayed = 0;
923 /* XXX: need has_b_frame, but cannot get it if the codec is
926 pc && pc->pict_type != AV_PICTURE_TYPE_B)
927 presentation_delayed = 1;
929 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){
930 pkt->dts -= 1LL<<st->pts_wrap_bits;
933 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
934 // we take the conservative approach and discard both
935 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
936 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
937 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
938 pkt->dts= AV_NOPTS_VALUE;
941 if (pkt->duration == 0) {
942 compute_frame_duration(&num, &den, st, pc, pkt);
944 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
947 if(pkt->duration != 0 && s->packet_buffer)
948 update_initial_durations(s, st, pkt);
950 /* correct timestamps with byte offset if demuxers only have timestamps
951 on packet boundaries */
952 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
953 /* this will estimate bitrate based on this frame's duration and size */
954 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
955 if(pkt->pts != AV_NOPTS_VALUE)
957 if(pkt->dts != AV_NOPTS_VALUE)
961 if (pc && pc->dts_sync_point >= 0) {
962 // we have synchronization info from the parser
963 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
965 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
966 if (pkt->dts != AV_NOPTS_VALUE) {
967 // got DTS from the stream, update reference timestamp
968 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
969 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
970 } else if (st->reference_dts != AV_NOPTS_VALUE) {
971 // compute DTS based on reference timestamp
972 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
973 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
975 if (pc->dts_sync_point > 0)
976 st->reference_dts = pkt->dts; // new reference
980 /* This may be redundant, but it should not hurt. */
981 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
982 presentation_delayed = 1;
984 // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc);
985 /* interpolate PTS and DTS if they are not present */
986 //We skip H264 currently because delay and has_b_frames are not reliably set
987 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
988 if (presentation_delayed) {
989 /* DTS = decompression timestamp */
990 /* PTS = presentation timestamp */
991 if (pkt->dts == AV_NOPTS_VALUE)
992 pkt->dts = st->last_IP_pts;
993 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
994 if (pkt->dts == AV_NOPTS_VALUE)
995 pkt->dts = st->cur_dts;
997 /* this is tricky: the dts must be incremented by the duration
998 of the frame we are displaying, i.e. the last I- or P-frame */
999 if (st->last_IP_duration == 0)
1000 st->last_IP_duration = pkt->duration;
1001 if(pkt->dts != AV_NOPTS_VALUE)
1002 st->cur_dts = pkt->dts + st->last_IP_duration;
1003 st->last_IP_duration = pkt->duration;
1004 st->last_IP_pts= pkt->pts;
1005 /* cannot compute PTS if not present (we can compute it only
1006 by knowing the future */
1007 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1008 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1009 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1010 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1011 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1012 pkt->pts += pkt->duration;
1013 // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size);
1017 /* presentation is not delayed : PTS and DTS are the same */
1018 if(pkt->pts == AV_NOPTS_VALUE)
1019 pkt->pts = pkt->dts;
1020 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1021 if(pkt->pts == AV_NOPTS_VALUE)
1022 pkt->pts = st->cur_dts;
1023 pkt->dts = pkt->pts;
1024 if(pkt->pts != AV_NOPTS_VALUE)
1025 st->cur_dts = pkt->pts + pkt->duration;
1029 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1030 st->pts_buffer[0]= pkt->pts;
1031 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1032 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1033 if(pkt->dts == AV_NOPTS_VALUE)
1034 pkt->dts= st->pts_buffer[0];
1035 if(st->codec->codec_id == CODEC_ID_H264){ // we skipped it above so we try here
1036 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1038 if(pkt->dts > st->cur_dts)
1039 st->cur_dts = pkt->dts;
1042 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
1045 if(is_intra_only(st->codec))
1046 pkt->flags |= AV_PKT_FLAG_KEY;
1049 /* keyframe computation */
1050 if (pc->key_frame == 1)
1051 pkt->flags |= AV_PKT_FLAG_KEY;
1052 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
1053 pkt->flags |= AV_PKT_FLAG_KEY;
1056 pkt->convergence_duration = pc->convergence_duration;
1060 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1065 av_init_packet(pkt);
1068 /* select current input stream component */
1071 if (!st->need_parsing || !st->parser) {
1072 /* no parsing needed: we just output the packet as is */
1073 /* raw data support */
1075 st->cur_pkt.data= NULL;
1076 st->cur_pkt.side_data_elems = 0;
1077 st->cur_pkt.side_data = NULL;
1078 compute_pkt_fields(s, st, NULL, pkt);
1080 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1081 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1082 ff_reduce_index(s, st->index);
1083 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1086 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1087 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1088 st->cur_ptr, st->cur_len,
1089 st->cur_pkt.pts, st->cur_pkt.dts,
1091 st->cur_pkt.pts = AV_NOPTS_VALUE;
1092 st->cur_pkt.dts = AV_NOPTS_VALUE;
1093 /* increment read pointer */
1097 /* return packet if any */
1101 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1102 if (st->codec->sample_rate > 0) {
1103 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1104 (AVRational){ 1, st->codec->sample_rate },
1108 } else if (st->codec->time_base.num != 0 &&
1109 st->codec->time_base.den != 0) {
1110 pkt->duration = av_rescale_q_rnd(st->parser->duration,
1111 st->codec->time_base,
1115 pkt->stream_index = st->index;
1116 pkt->pts = st->parser->pts;
1117 pkt->dts = st->parser->dts;
1118 pkt->pos = st->parser->pos;
1119 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1121 pkt->destruct= st->cur_pkt.destruct;
1122 st->cur_pkt.destruct= NULL;
1123 st->cur_pkt.data = NULL;
1124 assert(st->cur_len == 0);
1126 pkt->destruct = NULL;
1128 compute_pkt_fields(s, st, st->parser, pkt);
1130 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1131 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset;
1132 ff_reduce_index(s, st->index);
1133 av_add_index_entry(st, pos, pkt->dts,
1134 0, 0, AVINDEX_KEYFRAME);
1141 av_free_packet(&st->cur_pkt);
1146 /* read next packet */
1147 ret = av_read_packet(s, &cur_pkt);
1149 if (ret == AVERROR(EAGAIN))
1151 /* return the last frames, if any */
1152 for(i = 0; i < s->nb_streams; i++) {
1154 if (st->parser && st->need_parsing) {
1155 av_parser_parse2(st->parser, st->codec,
1156 &pkt->data, &pkt->size,
1158 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1164 /* no more packets: really terminate parsing */
1167 st = s->streams[cur_pkt.stream_index];
1168 st->cur_pkt= cur_pkt;
1170 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1171 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1172 st->cur_pkt.pts < st->cur_pkt.dts){
1173 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1174 st->cur_pkt.stream_index,
1178 // av_free_packet(&st->cur_pkt);
1182 if(s->debug & FF_FDEBUG_TS)
1183 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1184 st->cur_pkt.stream_index,
1188 st->cur_pkt.duration,
1192 st->cur_ptr = st->cur_pkt.data;
1193 st->cur_len = st->cur_pkt.size;
1194 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1195 st->parser = av_parser_init(st->codec->codec_id);
1197 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1198 "%s, packets or times may be invalid.\n",
1199 avcodec_get_name(st->codec->codec_id));
1200 /* no parser available: just output the raw packets */
1201 st->need_parsing = AVSTREAM_PARSE_NONE;
1202 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1203 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1204 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1205 st->parser->flags |= PARSER_FLAG_ONCE;
1210 if(s->debug & FF_FDEBUG_TS)
1211 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1222 static int read_from_packet_buffer(AVFormatContext *s, AVPacket *pkt)
1224 AVPacketList *pktl = s->packet_buffer;
1227 s->packet_buffer = pktl->next;
1232 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1234 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1238 return s->packet_buffer ? read_from_packet_buffer(s, pkt) :
1239 read_frame_internal(s, pkt);
1243 AVPacketList *pktl = s->packet_buffer;
1246 AVPacket *next_pkt = &pktl->pkt;
1248 if (next_pkt->dts != AV_NOPTS_VALUE) {
1249 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1250 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1251 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1252 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
1253 av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1254 next_pkt->pts = pktl->pkt.dts;
1258 pktl = s->packet_buffer;
1261 /* read packet from packet buffer, if there is data */
1262 if (!(next_pkt->pts == AV_NOPTS_VALUE &&
1263 next_pkt->dts != AV_NOPTS_VALUE && !eof))
1264 return read_from_packet_buffer(s, pkt);
1267 ret = read_frame_internal(s, pkt);
1269 if (pktl && ret != AVERROR(EAGAIN)) {
1276 if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1277 &s->packet_buffer_end)) < 0)
1278 return AVERROR(ENOMEM);
1282 /* XXX: suppress the packet queue */
1283 static void flush_packet_queue(AVFormatContext *s)
1288 pktl = s->packet_buffer;
1291 s->packet_buffer = pktl->next;
1292 av_free_packet(&pktl->pkt);
1295 while(s->raw_packet_buffer){
1296 pktl = s->raw_packet_buffer;
1297 s->raw_packet_buffer = pktl->next;
1298 av_free_packet(&pktl->pkt);
1301 s->packet_buffer_end=
1302 s->raw_packet_buffer_end= NULL;
1303 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1306 /*******************************************************/
1309 int av_find_default_stream_index(AVFormatContext *s)
1311 int first_audio_index = -1;
1315 if (s->nb_streams <= 0)
1317 for(i = 0; i < s->nb_streams; i++) {
1319 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1322 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1323 first_audio_index = i;
1325 return first_audio_index >= 0 ? first_audio_index : 0;
1329 * Flush the frame reader.
1331 void ff_read_frame_flush(AVFormatContext *s)
1336 flush_packet_queue(s);
1340 /* for each stream, reset read state */
1341 for(i = 0; i < s->nb_streams; i++) {
1345 av_parser_close(st->parser);
1347 av_free_packet(&st->cur_pkt);
1349 st->last_IP_pts = AV_NOPTS_VALUE;
1350 if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = 0;
1351 else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1352 st->reference_dts = AV_NOPTS_VALUE;
1357 st->probe_packets = MAX_PROBE_PACKETS;
1359 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1360 st->pts_buffer[j]= AV_NOPTS_VALUE;
1364 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1368 for(i = 0; i < s->nb_streams; i++) {
1369 AVStream *st = s->streams[i];
1371 st->cur_dts = av_rescale(timestamp,
1372 st->time_base.den * (int64_t)ref_st->time_base.num,
1373 st->time_base.num * (int64_t)ref_st->time_base.den);
1377 void ff_reduce_index(AVFormatContext *s, int stream_index)
1379 AVStream *st= s->streams[stream_index];
1380 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1382 if((unsigned)st->nb_index_entries >= max_entries){
1384 for(i=0; 2*i<st->nb_index_entries; i++)
1385 st->index_entries[i]= st->index_entries[2*i];
1386 st->nb_index_entries= i;
1390 int ff_add_index_entry(AVIndexEntry **index_entries,
1391 int *nb_index_entries,
1392 unsigned int *index_entries_allocated_size,
1393 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1395 AVIndexEntry *entries, *ie;
1398 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1401 entries = av_fast_realloc(*index_entries,
1402 index_entries_allocated_size,
1403 (*nb_index_entries + 1) *
1404 sizeof(AVIndexEntry));
1408 *index_entries= entries;
1410 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1413 index= (*nb_index_entries)++;
1414 ie= &entries[index];
1415 assert(index==0 || ie[-1].timestamp < timestamp);
1417 ie= &entries[index];
1418 if(ie->timestamp != timestamp){
1419 if(ie->timestamp <= timestamp)
1421 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1422 (*nb_index_entries)++;
1423 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1424 distance= ie->min_distance;
1428 ie->timestamp = timestamp;
1429 ie->min_distance= distance;
1436 int av_add_index_entry(AVStream *st,
1437 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1439 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1440 &st->index_entries_allocated_size, pos,
1441 timestamp, size, distance, flags);
1444 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1445 int64_t wanted_timestamp, int flags)
1453 //optimize appending index entries at the end
1454 if(b && entries[b-1].timestamp < wanted_timestamp)
1459 timestamp = entries[m].timestamp;
1460 if(timestamp >= wanted_timestamp)
1462 if(timestamp <= wanted_timestamp)
1465 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1467 if(!(flags & AVSEEK_FLAG_ANY)){
1468 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1469 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1478 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1481 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1482 wanted_timestamp, flags);
1485 int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
1487 AVInputFormat *avif= s->iformat;
1488 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1489 int64_t ts_min, ts_max, ts;
1494 if (stream_index < 0)
1497 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1500 ts_min= AV_NOPTS_VALUE;
1501 pos_limit= -1; //gcc falsely says it may be uninitialized
1503 st= s->streams[stream_index];
1504 if(st->index_entries){
1507 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()
1508 index= FFMAX(index, 0);
1509 e= &st->index_entries[index];
1511 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1513 ts_min= e->timestamp;
1514 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1520 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1521 assert(index < st->nb_index_entries);
1523 e= &st->index_entries[index];
1524 assert(e->timestamp >= target_ts);
1526 ts_max= e->timestamp;
1527 pos_limit= pos_max - e->min_distance;
1528 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1529 pos_max,pos_limit, ts_max);
1533 pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1538 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1541 ff_read_frame_flush(s);
1542 ff_update_cur_dts(s, st, ts);
1547 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
1548 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
1549 int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret,
1550 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1553 int64_t start_pos, filesize;
1556 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1558 if(ts_min == AV_NOPTS_VALUE){
1559 pos_min = s->data_offset;
1560 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1561 if (ts_min == AV_NOPTS_VALUE)
1565 if(ts_min >= target_ts){
1570 if(ts_max == AV_NOPTS_VALUE){
1572 filesize = avio_size(s->pb);
1573 pos_max = filesize - 1;
1576 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1578 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1579 if (ts_max == AV_NOPTS_VALUE)
1583 int64_t tmp_pos= pos_max + 1;
1584 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1585 if(tmp_ts == AV_NOPTS_VALUE)
1589 if(tmp_pos >= filesize)
1595 if(ts_max <= target_ts){
1600 if(ts_min > ts_max){
1602 }else if(ts_min == ts_max){
1607 while (pos_min < pos_limit) {
1608 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1609 pos_min, pos_max, ts_min, ts_max);
1610 assert(pos_limit <= pos_max);
1613 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1614 // interpolate position (better than dichotomy)
1615 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1616 + pos_min - approximate_keyframe_distance;
1617 }else if(no_change==1){
1618 // bisection, if interpolation failed to change min or max pos last time
1619 pos = (pos_min + pos_limit)>>1;
1621 /* linear search if bisection failed, can only happen if there
1622 are very few or no keyframes between min/max */
1627 else if(pos > pos_limit)
1631 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1636 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1637 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1638 pos_limit, start_pos, no_change);
1639 if(ts == AV_NOPTS_VALUE){
1640 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1643 assert(ts != AV_NOPTS_VALUE);
1644 if (target_ts <= ts) {
1645 pos_limit = start_pos - 1;
1649 if (target_ts >= ts) {
1655 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1656 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1659 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1661 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1662 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1663 pos, ts_min, target_ts, ts_max);
1669 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1670 int64_t pos_min, pos_max;
1674 if (stream_index < 0)
1677 st= s->streams[stream_index];
1680 pos_min = s->data_offset;
1681 pos_max = avio_size(s->pb) - 1;
1683 if (pos < pos_min) pos= pos_min;
1684 else if(pos > pos_max) pos= pos_max;
1686 avio_seek(s->pb, pos, SEEK_SET);
1689 av_update_cur_dts(s, st, ts);
1694 static int seek_frame_generic(AVFormatContext *s,
1695 int stream_index, int64_t timestamp, int flags)
1702 st = s->streams[stream_index];
1704 index = av_index_search_timestamp(st, timestamp, flags);
1706 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1709 if(index < 0 || index==st->nb_index_entries-1){
1713 if(st->nb_index_entries){
1714 assert(st->index_entries);
1715 ie= &st->index_entries[st->nb_index_entries-1];
1716 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1718 ff_update_cur_dts(s, st, ie->timestamp);
1720 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1726 read_status = av_read_frame(s, &pkt);
1727 } while (read_status == AVERROR(EAGAIN));
1728 if (read_status < 0)
1730 av_free_packet(&pkt);
1731 if(stream_index == pkt.stream_index && pkt.dts > timestamp){
1732 if(pkt.flags & AV_PKT_FLAG_KEY)
1734 if(nonkey++ > 1000 && st->codec->codec_id != CODEC_ID_CDGRAPHICS){
1735 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);
1740 index = av_index_search_timestamp(st, timestamp, flags);
1745 ff_read_frame_flush(s);
1746 AV_NOWARN_DEPRECATED(
1747 if (s->iformat->read_seek){
1748 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1752 ie = &st->index_entries[index];
1753 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1755 ff_update_cur_dts(s, st, ie->timestamp);
1760 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1765 if (flags & AVSEEK_FLAG_BYTE) {
1766 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1768 ff_read_frame_flush(s);
1769 return seek_frame_byte(s, stream_index, timestamp, flags);
1772 if(stream_index < 0){
1773 stream_index= av_find_default_stream_index(s);
1774 if(stream_index < 0)
1777 st= s->streams[stream_index];
1778 /* timestamp for default must be expressed in AV_TIME_BASE units */
1779 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1782 /* first, we try the format specific seek */
1783 AV_NOWARN_DEPRECATED(
1784 if (s->iformat->read_seek) {
1785 ff_read_frame_flush(s);
1786 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1794 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1795 ff_read_frame_flush(s);
1796 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
1797 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1798 ff_read_frame_flush(s);
1799 return seek_frame_generic(s, stream_index, timestamp, flags);
1805 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1807 if(min_ts > ts || max_ts < ts)
1810 if (s->iformat->read_seek2) {
1811 ff_read_frame_flush(s);
1812 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1815 if(s->iformat->read_timestamp){
1816 //try to seek via read_timestamp()
1819 //Fallback to old API if new is not implemented but old is
1820 //Note the old has somewat different sematics
1821 AV_NOWARN_DEPRECATED(
1822 if(s->iformat->read_seek || 1)
1823 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1826 // try some generic seek like seek_frame_generic() but with new ts semantics
1829 /*******************************************************/
1832 * Return TRUE if the stream has accurate duration in any stream.
1834 * @return TRUE if the stream has accurate duration for at least one component.
1836 static int has_duration(AVFormatContext *ic)
1840 if(ic->duration != AV_NOPTS_VALUE)
1843 for(i = 0;i < ic->nb_streams; i++) {
1844 st = ic->streams[i];
1845 if (st->duration != AV_NOPTS_VALUE)
1852 * Estimate the stream timings from the one of each components.
1854 * Also computes the global bitrate if possible.
1856 static void update_stream_timings(AVFormatContext *ic)
1858 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
1859 int64_t duration, duration1, filesize;
1863 start_time = INT64_MAX;
1864 start_time_text = INT64_MAX;
1865 end_time = INT64_MIN;
1866 duration = INT64_MIN;
1867 for(i = 0;i < ic->nb_streams; i++) {
1868 st = ic->streams[i];
1869 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1870 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1871 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1872 if (start_time1 < start_time_text)
1873 start_time_text = start_time1;
1875 start_time = FFMIN(start_time, start_time1);
1876 if (st->duration != AV_NOPTS_VALUE) {
1877 end_time1 = start_time1
1878 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1879 end_time = FFMAX(end_time, end_time1);
1882 if (st->duration != AV_NOPTS_VALUE) {
1883 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1884 duration = FFMAX(duration, duration1);
1887 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
1888 start_time = start_time_text;
1889 if (start_time != INT64_MAX) {
1890 ic->start_time = start_time;
1891 if (end_time != INT64_MIN)
1892 duration = FFMAX(duration, end_time - start_time);
1894 if (duration != INT64_MIN && ic->duration == AV_NOPTS_VALUE) {
1895 ic->duration = duration;
1897 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
1898 /* compute the bitrate */
1899 ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
1900 (double)ic->duration;
1904 static void fill_all_stream_timings(AVFormatContext *ic)
1909 update_stream_timings(ic);
1910 for(i = 0;i < ic->nb_streams; i++) {
1911 st = ic->streams[i];
1912 if (st->start_time == AV_NOPTS_VALUE) {
1913 if(ic->start_time != AV_NOPTS_VALUE)
1914 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1915 if(ic->duration != AV_NOPTS_VALUE)
1916 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1921 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1923 int64_t filesize, duration;
1927 /* if bit_rate is already set, we believe it */
1928 if (ic->bit_rate <= 0) {
1930 for(i=0;i<ic->nb_streams;i++) {
1931 st = ic->streams[i];
1932 if (st->codec->bit_rate > 0)
1933 bit_rate += st->codec->bit_rate;
1935 ic->bit_rate = bit_rate;
1938 /* if duration is already set, we believe it */
1939 if (ic->duration == AV_NOPTS_VALUE &&
1940 ic->bit_rate != 0) {
1941 filesize = ic->pb ? avio_size(ic->pb) : 0;
1943 for(i = 0; i < ic->nb_streams; i++) {
1944 st = ic->streams[i];
1945 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1946 if (st->duration == AV_NOPTS_VALUE)
1947 st->duration = duration;
1953 #define DURATION_MAX_READ_SIZE 250000
1954 #define DURATION_MAX_RETRY 3
1956 /* only usable for MPEG-PS streams */
1957 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1959 AVPacket pkt1, *pkt = &pkt1;
1961 int read_size, i, ret;
1963 int64_t filesize, offset, duration;
1968 /* flush packet queue */
1969 flush_packet_queue(ic);
1971 for (i=0; i<ic->nb_streams; i++) {
1972 st = ic->streams[i];
1973 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1974 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1977 av_parser_close(st->parser);
1979 av_free_packet(&st->cur_pkt);
1983 /* estimate the end time (duration) */
1984 /* XXX: may need to support wrapping */
1985 filesize = ic->pb ? avio_size(ic->pb) : 0;
1986 end_time = AV_NOPTS_VALUE;
1988 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1992 avio_seek(ic->pb, offset, SEEK_SET);
1995 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1999 ret = av_read_packet(ic, pkt);
2000 } while(ret == AVERROR(EAGAIN));
2003 read_size += pkt->size;
2004 st = ic->streams[pkt->stream_index];
2005 if (pkt->pts != AV_NOPTS_VALUE &&
2006 (st->start_time != AV_NOPTS_VALUE ||
2007 st->first_dts != AV_NOPTS_VALUE)) {
2008 duration = end_time = pkt->pts;
2009 if (st->start_time != AV_NOPTS_VALUE)
2010 duration -= st->start_time;
2012 duration -= st->first_dts;
2014 duration += 1LL<<st->pts_wrap_bits;
2016 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2017 st->duration = duration;
2020 av_free_packet(pkt);
2022 }while( end_time==AV_NOPTS_VALUE
2023 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2024 && ++retry <= DURATION_MAX_RETRY);
2026 fill_all_stream_timings(ic);
2028 avio_seek(ic->pb, old_offset, SEEK_SET);
2029 for (i=0; i<ic->nb_streams; i++) {
2031 st->cur_dts= st->first_dts;
2032 st->last_IP_pts = AV_NOPTS_VALUE;
2033 st->reference_dts = AV_NOPTS_VALUE;
2037 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2041 /* get the file size, if possible */
2042 if (ic->iformat->flags & AVFMT_NOFILE) {
2045 file_size = avio_size(ic->pb);
2046 file_size = FFMAX(0, file_size);
2049 if ((!strcmp(ic->iformat->name, "mpeg") ||
2050 !strcmp(ic->iformat->name, "mpegts")) &&
2051 file_size && ic->pb->seekable) {
2052 /* get accurate estimate from the PTSes */
2053 estimate_timings_from_pts(ic, old_offset);
2054 } else if (has_duration(ic)) {
2055 /* at least one component has timings - we use them for all
2057 fill_all_stream_timings(ic);
2059 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2060 /* less precise: use bitrate info */
2061 estimate_timings_from_bit_rate(ic);
2063 update_stream_timings(ic);
2067 AVStream av_unused *st;
2068 for(i = 0;i < ic->nb_streams; i++) {
2069 st = ic->streams[i];
2070 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2071 (double) st->start_time / AV_TIME_BASE,
2072 (double) st->duration / AV_TIME_BASE);
2074 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2075 (double) ic->start_time / AV_TIME_BASE,
2076 (double) ic->duration / AV_TIME_BASE,
2077 ic->bit_rate / 1000);
2081 static int has_codec_parameters(AVCodecContext *avctx)
2084 switch (avctx->codec_type) {
2085 case AVMEDIA_TYPE_AUDIO:
2086 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
2087 if (!avctx->frame_size &&
2088 (avctx->codec_id == CODEC_ID_VORBIS ||
2089 avctx->codec_id == CODEC_ID_AAC ||
2090 avctx->codec_id == CODEC_ID_MP1 ||
2091 avctx->codec_id == CODEC_ID_MP2 ||
2092 avctx->codec_id == CODEC_ID_MP3 ||
2093 avctx->codec_id == CODEC_ID_CELT))
2096 case AVMEDIA_TYPE_VIDEO:
2097 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2099 case AVMEDIA_TYPE_DATA:
2100 if(avctx->codec_id == CODEC_ID_NONE) return 1;
2105 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2108 static int has_decode_delay_been_guessed(AVStream *st)
2110 return st->codec->codec_id != CODEC_ID_H264 ||
2111 st->info->nb_decoded_frames >= 6;
2114 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2115 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2118 int got_picture = 1, ret = 0;
2120 AVPacket pkt = *avpkt;
2122 if (!avcodec_is_open(st->codec)) {
2123 AVDictionary *thread_opt = NULL;
2125 codec = st->codec->codec ? st->codec->codec :
2126 avcodec_find_decoder(st->codec->codec_id);
2131 /* force thread count to 1 since the h264 decoder will not extract SPS
2132 * and PPS to extradata during multi-threaded decoding */
2133 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2134 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2136 av_dict_free(&thread_opt);
2141 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2143 (!has_codec_parameters(st->codec) ||
2144 !has_decode_delay_been_guessed(st) ||
2145 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
2147 avcodec_get_frame_defaults(&picture);
2148 switch(st->codec->codec_type) {
2149 case AVMEDIA_TYPE_VIDEO:
2150 ret = avcodec_decode_video2(st->codec, &picture,
2151 &got_picture, &pkt);
2153 case AVMEDIA_TYPE_AUDIO:
2154 ret = avcodec_decode_audio4(st->codec, &picture, &got_picture, &pkt);
2161 st->info->nb_decoded_frames++;
2167 if(!pkt.data && !got_picture)
2172 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2174 while (tags->id != CODEC_ID_NONE) {
2182 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2185 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2186 if(tag == tags[i].tag)
2189 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2190 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2193 return CODEC_ID_NONE;
2196 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2199 for(i=0; tags && tags[i]; i++){
2200 int tag= ff_codec_get_tag(tags[i], id);
2206 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2209 for(i=0; tags && tags[i]; i++){
2210 enum CodecID id= ff_codec_get_id(tags[i], tag);
2211 if(id!=CODEC_ID_NONE) return id;
2213 return CODEC_ID_NONE;
2216 static void compute_chapters_end(AVFormatContext *s)
2219 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2221 for (i = 0; i < s->nb_chapters; i++)
2222 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2223 AVChapter *ch = s->chapters[i];
2224 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2227 for (j = 0; j < s->nb_chapters; j++) {
2228 AVChapter *ch1 = s->chapters[j];
2229 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2230 if (j != i && next_start > ch->start && next_start < end)
2233 ch->end = (end == INT64_MAX) ? ch->start : end;
2237 static int get_std_framerate(int i){
2238 if(i<60*12) return i*1001;
2239 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2243 * Is the time base unreliable.
2244 * This is a heuristic to balance between quick acceptance of the values in
2245 * the headers vs. some extra checks.
2246 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2247 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2248 * And there are "variable" fps files this needs to detect as well.
2250 static int tb_unreliable(AVCodecContext *c){
2251 if( c->time_base.den >= 101L*c->time_base.num
2252 || c->time_base.den < 5L*c->time_base.num
2253 /* || c->codec_tag == AV_RL32("DIVX")
2254 || c->codec_tag == AV_RL32("XVID")*/
2255 || c->codec_id == CODEC_ID_MPEG2VIDEO
2256 || c->codec_id == CODEC_ID_H264
2262 #if FF_API_FORMAT_PARAMETERS
2263 int av_find_stream_info(AVFormatContext *ic)
2265 return avformat_find_stream_info(ic, NULL);
2269 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2271 int i, count, ret, read_size, j;
2273 AVPacket pkt1, *pkt;
2274 int64_t old_offset = avio_tell(ic->pb);
2275 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2276 int flush_codecs = 1;
2278 for(i=0;i<ic->nb_streams;i++) {
2280 AVDictionary *thread_opt = NULL;
2281 st = ic->streams[i];
2283 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2284 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2285 /* if(!st->time_base.num)
2287 if(!st->codec->time_base.num)
2288 st->codec->time_base= st->time_base;
2290 //only for the split stuff
2291 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2292 st->parser = av_parser_init(st->codec->codec_id);
2293 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2294 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2297 codec = st->codec->codec ? st->codec->codec :
2298 avcodec_find_decoder(st->codec->codec_id);
2300 /* force thread count to 1 since the h264 decoder will not extract SPS
2301 * and PPS to extradata during multi-threaded decoding */
2302 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
2304 /* Ensure that subtitle_header is properly set. */
2305 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2306 && codec && !st->codec->codec)
2307 avcodec_open2(st->codec, codec, options ? &options[i]
2310 //try to just open decoders, in case this is enough to get parameters
2311 if(!has_codec_parameters(st->codec)){
2312 if (codec && !st->codec->codec)
2313 avcodec_open2(st->codec, codec, options ? &options[i]
2317 av_dict_free(&thread_opt);
2320 for (i=0; i<ic->nb_streams; i++) {
2321 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2327 if (ff_check_interrupt(&ic->interrupt_callback)){
2329 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2333 /* check if one codec still needs to be handled */
2334 for(i=0;i<ic->nb_streams;i++) {
2335 int fps_analyze_framecount = 20;
2337 st = ic->streams[i];
2338 if (!has_codec_parameters(st->codec))
2340 /* if the timebase is coarse (like the usual millisecond precision
2341 of mkv), we need to analyze more frames to reliably arrive at
2343 if (av_q2d(st->time_base) > 0.0005)
2344 fps_analyze_framecount *= 2;
2345 if (ic->fps_probe_size >= 0)
2346 fps_analyze_framecount = ic->fps_probe_size;
2347 /* variable fps and no guess at the real fps */
2348 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2349 && st->info->duration_count < fps_analyze_framecount
2350 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2352 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2354 if(st->first_dts == AV_NOPTS_VALUE && (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
2357 if (i == ic->nb_streams) {
2358 /* NOTE: if the format has no header, then we need to read
2359 some packets to get most of the streams, so we cannot
2361 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2362 /* if we found the info for all the codecs, we can stop */
2364 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2369 /* we did not get all the codec info, but we read too much data */
2370 if (read_size >= ic->probesize) {
2372 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2376 /* NOTE: a new stream can be added there if no header in file
2377 (AVFMTCTX_NOHEADER) */
2378 ret = read_frame_internal(ic, &pkt1);
2379 if (ret == AVERROR(EAGAIN))
2387 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2388 if ((ret = av_dup_packet(pkt)) < 0)
2389 goto find_stream_info_err;
2391 read_size += pkt->size;
2393 st = ic->streams[pkt->stream_index];
2394 if (st->codec_info_nb_frames>1) {
2396 if (st->time_base.den > 0)
2397 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
2398 if (st->avg_frame_rate.num > 0)
2399 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num}, AV_TIME_BASE_Q));
2401 if (t >= ic->max_analyze_duration) {
2402 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2405 st->info->codec_info_duration += pkt->duration;
2408 int64_t last = st->info->last_dts;
2410 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2411 double dts= pkt->dts * av_q2d(st->time_base);
2412 int64_t duration= pkt->dts - last;
2414 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2415 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
2416 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) {
2417 int framerate= get_std_framerate(i);
2418 double sdts= dts*framerate/(1001*12);
2420 int ticks= lrintf(sdts+j*0.5);
2421 double error= sdts - ticks + j*0.5;
2422 st->info->duration_error[j][0][i] += error;
2423 st->info->duration_error[j][1][i] += error*error;
2426 st->info->duration_count++;
2427 // ignore the first 4 values, they might have some random jitter
2428 if (st->info->duration_count > 3)
2429 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2431 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2432 st->info->last_dts = pkt->dts;
2434 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2435 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2436 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
2437 st->codec->extradata_size= i;
2438 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2439 if (!st->codec->extradata)
2440 return AVERROR(ENOMEM);
2441 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2442 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2446 /* if still no information, we try to open the codec and to
2447 decompress the frame. We try to avoid that in most cases as
2448 it takes longer and uses more memory. For MPEG-4, we need to
2449 decompress for QuickTime.
2451 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2452 least one frame of codec data, this makes sure the codec initializes
2453 the channel configuration and does not only trust the values from the container.
2455 try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL);
2457 st->codec_info_nb_frames++;
2462 AVPacket empty_pkt = { 0 };
2464 av_init_packet(&empty_pkt);
2466 ret = -1; /* we could not have all the codec parameters before EOF */
2467 for(i=0;i<ic->nb_streams;i++) {
2468 st = ic->streams[i];
2470 /* flush the decoders */
2472 err = try_decode_frame(st, &empty_pkt,
2473 (options && i < orig_nb_streams) ?
2474 &options[i] : NULL);
2475 } while (err > 0 && !has_codec_parameters(st->codec));
2478 av_log(ic, AV_LOG_INFO,
2479 "decoding for stream %d failed\n", st->index);
2481 if (!has_codec_parameters(st->codec)){
2483 avcodec_string(buf, sizeof(buf), st->codec, 0);
2484 av_log(ic, AV_LOG_WARNING,
2485 "Could not find codec parameters (%s)\n", buf);
2492 // close codecs which were opened in try_decode_frame()
2493 for(i=0;i<ic->nb_streams;i++) {
2494 st = ic->streams[i];
2495 avcodec_close(st->codec);
2497 for(i=0;i<ic->nb_streams;i++) {
2498 st = ic->streams[i];
2499 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2500 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2501 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2502 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2503 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2504 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2505 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2506 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2507 st->codec->codec_tag= tag;
2510 // the check for tb_unreliable() is not completely correct, since this is not about handling
2511 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2512 // ipmovie.c produces.
2513 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)
2514 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);
2515 if (st->info->duration_count && !st->r_frame_rate.num
2516 && tb_unreliable(st->codec) /*&&
2517 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2518 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2520 double best_error= 0.01;
2522 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) {
2525 if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j))
2527 if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j))
2530 int n= st->info->duration_count;
2531 double a= st->info->duration_error[k][0][j] / n;
2532 double error= st->info->duration_error[k][1][j]/n - a*a;
2534 if(error < best_error && best_error> 0.000000001){
2536 num = get_std_framerate(j);
2539 av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
2542 // do not increase frame rate by more than 1 % in order to match a standard rate.
2543 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2544 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2547 if (!st->r_frame_rate.num){
2548 if( st->codec->time_base.den * (int64_t)st->time_base.num
2549 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2550 st->r_frame_rate.num = st->codec->time_base.den;
2551 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2553 st->r_frame_rate.num = st->time_base.den;
2554 st->r_frame_rate.den = st->time_base.num;
2557 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2558 if(!st->codec->bits_per_coded_sample)
2559 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2560 // set stream disposition based on audio service type
2561 switch (st->codec->audio_service_type) {
2562 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2563 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2564 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2565 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2566 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2567 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2568 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2569 st->disposition = AV_DISPOSITION_COMMENT; break;
2570 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2571 st->disposition = AV_DISPOSITION_KARAOKE; break;
2576 estimate_timings(ic, old_offset);
2578 compute_chapters_end(ic);
2581 /* correct DTS for B-frame streams with no timestamps */
2582 for(i=0;i<ic->nb_streams;i++) {
2583 st = ic->streams[i];
2584 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2586 ppktl = &ic->packet_buffer;
2588 if(ppkt1->stream_index != i)
2590 if(ppkt1->pkt->dts < 0)
2592 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2594 ppkt1->pkt->dts -= delta;
2599 st->cur_dts -= delta;
2605 find_stream_info_err:
2606 for (i=0; i < ic->nb_streams; i++) {
2607 if (ic->streams[i]->codec)
2608 ic->streams[i]->codec->thread_count = 0;
2609 av_freep(&ic->streams[i]->info);
2614 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
2618 for (i = 0; i < ic->nb_programs; i++) {
2619 if (ic->programs[i] == last) {
2623 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2624 if (ic->programs[i]->stream_index[j] == s)
2625 return ic->programs[i];
2631 int av_find_best_stream(AVFormatContext *ic,
2632 enum AVMediaType type,
2633 int wanted_stream_nb,
2635 AVCodec **decoder_ret,
2638 int i, nb_streams = ic->nb_streams;
2639 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2640 unsigned *program = NULL;
2641 AVCodec *decoder = NULL, *best_decoder = NULL;
2643 if (related_stream >= 0 && wanted_stream_nb < 0) {
2644 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
2646 program = p->stream_index;
2647 nb_streams = p->nb_stream_indexes;
2650 for (i = 0; i < nb_streams; i++) {
2651 int real_stream_index = program ? program[i] : i;
2652 AVStream *st = ic->streams[real_stream_index];
2653 AVCodecContext *avctx = st->codec;
2654 if (avctx->codec_type != type)
2656 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2658 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2661 decoder = avcodec_find_decoder(st->codec->codec_id);
2664 ret = AVERROR_DECODER_NOT_FOUND;
2668 if (best_count >= st->codec_info_nb_frames)
2670 best_count = st->codec_info_nb_frames;
2671 ret = real_stream_index;
2672 best_decoder = decoder;
2673 if (program && i == nb_streams - 1 && ret < 0) {
2675 nb_streams = ic->nb_streams;
2676 i = 0; /* no related stream found, try again with everything */
2680 *decoder_ret = best_decoder;
2684 /*******************************************************/
2686 int av_read_play(AVFormatContext *s)
2688 if (s->iformat->read_play)
2689 return s->iformat->read_play(s);
2691 return avio_pause(s->pb, 0);
2692 return AVERROR(ENOSYS);
2695 int av_read_pause(AVFormatContext *s)
2697 if (s->iformat->read_pause)
2698 return s->iformat->read_pause(s);
2700 return avio_pause(s->pb, 1);
2701 return AVERROR(ENOSYS);
2704 void avformat_free_context(AVFormatContext *s)
2710 if (s->iformat && s->iformat->priv_class && s->priv_data)
2711 av_opt_free(s->priv_data);
2713 for(i=0;i<s->nb_streams;i++) {
2714 /* free all data in a stream component */
2717 av_parser_close(st->parser);
2718 av_free_packet(&st->cur_pkt);
2720 av_dict_free(&st->metadata);
2721 av_freep(&st->index_entries);
2722 av_freep(&st->codec->extradata);
2723 av_freep(&st->codec->subtitle_header);
2724 av_freep(&st->codec);
2725 av_freep(&st->priv_data);
2726 av_freep(&st->info);
2729 for(i=s->nb_programs-1; i>=0; i--) {
2730 av_dict_free(&s->programs[i]->metadata);
2731 av_freep(&s->programs[i]->stream_index);
2732 av_freep(&s->programs[i]);
2734 av_freep(&s->programs);
2735 av_freep(&s->priv_data);
2736 while(s->nb_chapters--) {
2737 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2738 av_freep(&s->chapters[s->nb_chapters]);
2740 av_freep(&s->chapters);
2741 av_dict_free(&s->metadata);
2742 av_freep(&s->streams);
2746 #if FF_API_CLOSE_INPUT_FILE
2747 void av_close_input_file(AVFormatContext *s)
2749 avformat_close_input(&s);
2753 void avformat_close_input(AVFormatContext **ps)
2755 AVFormatContext *s = *ps;
2756 AVIOContext *pb = (s->iformat && (s->iformat->flags & AVFMT_NOFILE)) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2758 flush_packet_queue(s);
2759 if (s->iformat && (s->iformat->read_close))
2760 s->iformat->read_close(s);
2761 avformat_free_context(s);
2767 #if FF_API_NEW_STREAM
2768 AVStream *av_new_stream(AVFormatContext *s, int id)
2770 AVStream *st = avformat_new_stream(s, NULL);
2777 AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c)
2783 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2785 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2788 s->streams = streams;
2790 st = av_mallocz(sizeof(AVStream));
2793 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2798 st->codec = avcodec_alloc_context3(c);
2800 /* no default bitrate if decoding */
2801 st->codec->bit_rate = 0;
2803 st->index = s->nb_streams;
2804 st->start_time = AV_NOPTS_VALUE;
2805 st->duration = AV_NOPTS_VALUE;
2806 /* we set the current DTS to 0 so that formats without any timestamps
2807 but durations get some timestamps, formats with some unknown
2808 timestamps have their first few packets buffered and the
2809 timestamps corrected before they are returned to the user */
2811 st->first_dts = AV_NOPTS_VALUE;
2812 st->probe_packets = MAX_PROBE_PACKETS;
2814 /* default pts setting is MPEG-like */
2815 avpriv_set_pts_info(st, 33, 1, 90000);
2816 st->last_IP_pts = AV_NOPTS_VALUE;
2817 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2818 st->pts_buffer[i]= AV_NOPTS_VALUE;
2819 st->reference_dts = AV_NOPTS_VALUE;
2821 st->sample_aspect_ratio = (AVRational){0,1};
2823 s->streams[s->nb_streams++] = st;
2827 AVProgram *av_new_program(AVFormatContext *ac, int id)
2829 AVProgram *program=NULL;
2832 av_dlog(ac, "new_program: id=0x%04x\n", id);
2834 for(i=0; i<ac->nb_programs; i++)
2835 if(ac->programs[i]->id == id)
2836 program = ac->programs[i];
2839 program = av_mallocz(sizeof(AVProgram));
2842 dynarray_add(&ac->programs, &ac->nb_programs, program);
2843 program->discard = AVDISCARD_NONE;
2850 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2852 AVChapter *chapter = NULL;
2855 for(i=0; i<s->nb_chapters; i++)
2856 if(s->chapters[i]->id == id)
2857 chapter = s->chapters[i];
2860 chapter= av_mallocz(sizeof(AVChapter));
2863 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2865 av_dict_set(&chapter->metadata, "title", title, 0);
2867 chapter->time_base= time_base;
2868 chapter->start = start;
2874 /************************************************************/
2875 /* output media file */
2877 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
2878 const char *format, const char *filename)
2880 AVFormatContext *s = avformat_alloc_context();
2889 oformat = av_guess_format(format, NULL, NULL);
2891 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
2892 ret = AVERROR(EINVAL);
2896 oformat = av_guess_format(NULL, filename, NULL);
2898 ret = AVERROR(EINVAL);
2899 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
2906 s->oformat = oformat;
2907 if (s->oformat->priv_data_size > 0) {
2908 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2911 if (s->oformat->priv_class) {
2912 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2913 av_opt_set_defaults(s->priv_data);
2916 s->priv_data = NULL;
2919 av_strlcpy(s->filename, filename, sizeof(s->filename));
2923 av_log(s, AV_LOG_ERROR, "Out of memory\n");
2924 ret = AVERROR(ENOMEM);
2926 avformat_free_context(s);
2930 #if FF_API_ALLOC_OUTPUT_CONTEXT
2931 AVFormatContext *avformat_alloc_output_context(const char *format,
2932 AVOutputFormat *oformat, const char *filename)
2934 AVFormatContext *avctx;
2935 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
2936 return ret < 0 ? NULL : avctx;
2940 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2942 const AVCodecTag *avctag;
2944 enum CodecID id = CODEC_ID_NONE;
2945 unsigned int tag = 0;
2948 * Check that tag + id is in the table
2949 * If neither is in the table -> OK
2950 * If tag is in the table with another id -> FAIL
2951 * If id is in the table with another tag -> FAIL unless strict < normal
2953 for (n = 0; s->oformat->codec_tag[n]; n++) {
2954 avctag = s->oformat->codec_tag[n];
2955 while (avctag->id != CODEC_ID_NONE) {
2956 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
2958 if (id == st->codec->codec_id)
2961 if (avctag->id == st->codec->codec_id)
2966 if (id != CODEC_ID_NONE)
2968 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2973 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2977 AVDictionary *tmp = NULL;
2980 av_dict_copy(&tmp, *options, 0);
2981 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2983 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
2984 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2987 // some sanity checks
2988 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2989 av_log(s, AV_LOG_ERROR, "no streams\n");
2990 ret = AVERROR(EINVAL);
2994 for(i=0;i<s->nb_streams;i++) {
2997 switch (st->codec->codec_type) {
2998 case AVMEDIA_TYPE_AUDIO:
2999 if(st->codec->sample_rate<=0){
3000 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
3001 ret = AVERROR(EINVAL);
3004 if(!st->codec->block_align)
3005 st->codec->block_align = st->codec->channels *
3006 av_get_bits_per_sample(st->codec->codec_id) >> 3;
3008 case AVMEDIA_TYPE_VIDEO:
3009 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
3010 av_log(s, AV_LOG_ERROR, "time base not set\n");
3011 ret = AVERROR(EINVAL);
3014 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
3015 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
3016 ret = AVERROR(EINVAL);
3019 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)
3020 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
3022 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
3023 "(%d/%d) and encoder layer (%d/%d)\n",
3024 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3025 st->codec->sample_aspect_ratio.num,
3026 st->codec->sample_aspect_ratio.den);
3027 ret = AVERROR(EINVAL);
3033 if(s->oformat->codec_tag){
3034 if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
3035 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
3036 st->codec->codec_tag= 0;
3038 if(st->codec->codec_tag){
3039 if (!validate_codec_tag(s, st)) {
3041 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3042 av_log(s, AV_LOG_ERROR,
3043 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
3044 tagbuf, st->codec->codec_tag, st->codec->codec_id);
3045 ret = AVERROR_INVALIDDATA;
3049 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3052 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3053 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3054 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3057 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3058 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3059 if (!s->priv_data) {
3060 ret = AVERROR(ENOMEM);
3063 if (s->oformat->priv_class) {
3064 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3065 av_opt_set_defaults(s->priv_data);
3066 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3071 /* set muxer identification string */
3072 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3073 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3076 if(s->oformat->write_header){
3077 ret = s->oformat->write_header(s);
3082 /* init PTS generation */
3083 for(i=0;i<s->nb_streams;i++) {
3084 int64_t den = AV_NOPTS_VALUE;
3087 switch (st->codec->codec_type) {
3088 case AVMEDIA_TYPE_AUDIO:
3089 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3091 case AVMEDIA_TYPE_VIDEO:
3092 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3097 if (den != AV_NOPTS_VALUE) {
3099 ret = AVERROR_INVALIDDATA;
3102 frac_init(&st->pts, 0, 0, den);
3107 av_dict_free(options);
3116 //FIXME merge with compute_pkt_fields
3117 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3118 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3119 int num, den, frame_size, i;
3121 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
3122 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
3124 /* duration field */
3125 if (pkt->duration == 0) {
3126 compute_frame_duration(&num, &den, st, NULL, pkt);
3128 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3132 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3135 //XXX/FIXME this is a temporary hack until all encoders output pts
3136 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3138 // pkt->pts= st->cur_dts;
3139 pkt->pts= st->pts.val;
3142 //calculate dts from pts
3143 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3144 st->pts_buffer[0]= pkt->pts;
3145 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3146 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3147 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3148 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3150 pkt->dts= st->pts_buffer[0];
3153 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)){
3154 av_log(s, AV_LOG_ERROR,
3155 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
3156 st->index, st->cur_dts, pkt->dts);
3157 return AVERROR(EINVAL);
3159 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3160 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3161 return AVERROR(EINVAL);
3164 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3165 st->cur_dts= pkt->dts;
3166 st->pts.val= pkt->dts;
3169 switch (st->codec->codec_type) {
3170 case AVMEDIA_TYPE_AUDIO:
3171 frame_size = get_audio_frame_size(st->codec, pkt->size);
3173 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3174 likely equal to the encoder delay, but it would be better if we
3175 had the real timestamps from the encoder */
3176 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3177 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3180 case AVMEDIA_TYPE_VIDEO:
3181 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3189 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3194 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
3195 return s->oformat->write_packet(s, pkt);
3199 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3201 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3204 ret= s->oformat->write_packet(s, pkt);
3207 s->streams[pkt->stream_index]->nb_frames++;
3211 #define CHUNK_START 0x1000
3213 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3214 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3216 AVPacketList **next_point, *this_pktl;
3217 AVStream *st= s->streams[pkt->stream_index];
3218 int chunked= s->max_chunk_size || s->max_chunk_duration;
3220 this_pktl = av_mallocz(sizeof(AVPacketList));
3222 return AVERROR(ENOMEM);
3223 this_pktl->pkt= *pkt;
3224 pkt->destruct= NULL; // do not free original but only the copy
3225 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3227 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3228 next_point = &(st->last_in_packet_buffer->next);
3230 next_point = &s->packet_buffer;
3235 uint64_t max= av_rescale_q(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base);
3236 if( st->interleaver_chunk_size + pkt->size <= s->max_chunk_size-1U
3237 && st->interleaver_chunk_duration + pkt->duration <= max-1U){
3238 st->interleaver_chunk_size += pkt->size;
3239 st->interleaver_chunk_duration += pkt->duration;
3242 st->interleaver_chunk_size =
3243 st->interleaver_chunk_duration = 0;
3244 this_pktl->pkt.flags |= CHUNK_START;
3248 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3250 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
3251 || !compare(s, &(*next_point)->pkt, pkt))){
3252 next_point= &(*next_point)->next;
3257 next_point = &(s->packet_buffer_end->next);
3260 assert(!*next_point);
3262 s->packet_buffer_end= this_pktl;
3265 this_pktl->next= *next_point;
3267 s->streams[pkt->stream_index]->last_in_packet_buffer=
3268 *next_point= this_pktl;
3272 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3274 AVStream *st = s->streams[ pkt ->stream_index];
3275 AVStream *st2= s->streams[ next->stream_index];
3276 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3278 if(s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))){
3279 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);
3280 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);
3282 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
3283 -( 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;
3286 comp= (ts>ts2) - (ts<ts2);
3290 return pkt->stream_index < next->stream_index;
3294 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3296 int stream_count=0, noninterleaved_count=0;
3297 int64_t delta_dts_max = 0;
3301 ret = ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3306 for(i=0; i < s->nb_streams; i++) {
3307 if (s->streams[i]->last_in_packet_buffer) {
3309 } else if(s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3310 ++noninterleaved_count;
3314 if (s->nb_streams == stream_count) {
3317 for(i=0; i < s->nb_streams; i++) {
3318 if (s->streams[i]->last_in_packet_buffer) {
3320 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
3321 s->streams[i]->time_base,
3323 av_rescale_q(s->packet_buffer->pkt.dts,
3324 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
3326 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
3329 if(s->nb_streams == stream_count+noninterleaved_count &&
3330 delta_dts_max > 20*AV_TIME_BASE) {
3331 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
3335 if(stream_count && flush){
3336 pktl= s->packet_buffer;
3339 s->packet_buffer= pktl->next;
3340 if(!s->packet_buffer)
3341 s->packet_buffer_end= NULL;
3343 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3344 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3348 av_init_packet(out);
3354 * Interleave an AVPacket correctly so it can be muxed.
3355 * @param out the interleaved packet will be output here
3356 * @param in the input packet
3357 * @param flush 1 if no further packets are available as input and all
3358 * remaining packets should be output
3359 * @return 1 if a packet was output, 0 if no packet could be output,
3360 * < 0 if an error occurred
3362 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3363 if (s->oformat->interleave_packet) {
3364 int ret = s->oformat->interleave_packet(s, out, in, flush);
3369 return av_interleave_packet_per_dts(s, out, in, flush);
3372 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3373 AVStream *st= s->streams[ pkt->stream_index];
3376 //FIXME/XXX/HACK drop zero sized packets
3377 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3380 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3381 pkt->size, pkt->dts, pkt->pts);
3382 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3385 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3386 return AVERROR(EINVAL);
3390 int ret= interleave_packet(s, &opkt, pkt, 0);
3391 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3394 ret= s->oformat->write_packet(s, &opkt);
3396 s->streams[opkt.stream_index]->nb_frames++;
3398 av_free_packet(&opkt);
3403 if(s->pb && s->pb->error)
3404 return s->pb->error;
3408 int av_write_trailer(AVFormatContext *s)
3414 ret= interleave_packet(s, &pkt, NULL, 1);
3415 if(ret<0) //FIXME cleanup needed for ret<0 ?
3420 ret= s->oformat->write_packet(s, &pkt);
3422 s->streams[pkt.stream_index]->nb_frames++;
3424 av_free_packet(&pkt);
3428 if(s->pb && s->pb->error)
3432 if(s->oformat->write_trailer)
3433 ret = s->oformat->write_trailer(s);
3436 ret = s->pb ? s->pb->error : 0;
3437 for(i=0;i<s->nb_streams;i++) {
3438 av_freep(&s->streams[i]->priv_data);
3439 av_freep(&s->streams[i]->index_entries);
3441 if (s->oformat->priv_class)
3442 av_opt_free(s->priv_data);
3443 av_freep(&s->priv_data);
3447 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3448 int64_t *dts, int64_t *wall)
3450 if (!s->oformat || !s->oformat->get_output_timestamp)
3451 return AVERROR(ENOSYS);
3452 s->oformat->get_output_timestamp(s, stream, dts, wall);
3456 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3459 AVProgram *program=NULL;
3462 if (idx >= ac->nb_streams) {
3463 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3467 for(i=0; i<ac->nb_programs; i++){
3468 if(ac->programs[i]->id != progid)
3470 program = ac->programs[i];
3471 for(j=0; j<program->nb_stream_indexes; j++)
3472 if(program->stream_index[j] == idx)
3475 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3478 program->stream_index = tmp;
3479 program->stream_index[program->nb_stream_indexes++] = idx;
3484 static void print_fps(double d, const char *postfix){
3485 uint64_t v= lrintf(d*100);
3486 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3487 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3488 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3491 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3493 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3494 AVDictionaryEntry *tag=NULL;
3496 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3497 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3498 if(strcmp("language", tag->key)){
3499 const char *p = tag->value;
3500 av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key);
3503 size_t len = strcspn(p, "\xd\xa");
3504 av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1));
3505 av_log(ctx, AV_LOG_INFO, "%s", tmp);
3507 if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " ");
3508 if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, "");
3511 av_log(ctx, AV_LOG_INFO, "\n");
3517 /* "user interface" functions */
3518 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3521 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3522 AVStream *st = ic->streams[i];
3523 int g = av_gcd(st->time_base.num, st->time_base.den);
3524 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3525 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3526 av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i);
3527 /* the pid is an important information, so we display it */
3528 /* XXX: add a generic system */
3529 if (flags & AVFMT_SHOW_IDS)
3530 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3532 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3533 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3534 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3535 if (st->sample_aspect_ratio.num && // default
3536 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3537 AVRational display_aspect_ratio;
3538 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3539 st->codec->width*st->sample_aspect_ratio.num,
3540 st->codec->height*st->sample_aspect_ratio.den,
3542 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3543 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3544 display_aspect_ratio.num, display_aspect_ratio.den);
3546 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3547 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3548 print_fps(av_q2d(st->avg_frame_rate), "fps");
3549 if(st->r_frame_rate.den && st->r_frame_rate.num)
3550 print_fps(av_q2d(st->r_frame_rate), "tbr");
3551 if(st->time_base.den && st->time_base.num)
3552 print_fps(1/av_q2d(st->time_base), "tbn");
3553 if(st->codec->time_base.den && st->codec->time_base.num)
3554 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3556 if (st->disposition & AV_DISPOSITION_DEFAULT)
3557 av_log(NULL, AV_LOG_INFO, " (default)");
3558 if (st->disposition & AV_DISPOSITION_DUB)
3559 av_log(NULL, AV_LOG_INFO, " (dub)");
3560 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3561 av_log(NULL, AV_LOG_INFO, " (original)");
3562 if (st->disposition & AV_DISPOSITION_COMMENT)
3563 av_log(NULL, AV_LOG_INFO, " (comment)");
3564 if (st->disposition & AV_DISPOSITION_LYRICS)
3565 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3566 if (st->disposition & AV_DISPOSITION_KARAOKE)
3567 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3568 if (st->disposition & AV_DISPOSITION_FORCED)
3569 av_log(NULL, AV_LOG_INFO, " (forced)");
3570 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3571 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3572 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3573 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3574 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3575 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3576 av_log(NULL, AV_LOG_INFO, "\n");
3577 dump_metadata(NULL, st->metadata, " ");
3580 void av_dump_format(AVFormatContext *ic,
3586 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3587 if (ic->nb_streams && !printed)
3590 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3591 is_output ? "Output" : "Input",
3593 is_output ? ic->oformat->name : ic->iformat->name,
3594 is_output ? "to" : "from", url);
3595 dump_metadata(NULL, ic->metadata, " ");
3597 av_log(NULL, AV_LOG_INFO, " Duration: ");
3598 if (ic->duration != AV_NOPTS_VALUE) {
3599 int hours, mins, secs, us;
3600 secs = ic->duration / AV_TIME_BASE;
3601 us = ic->duration % AV_TIME_BASE;
3606 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3607 (100 * us) / AV_TIME_BASE);
3609 av_log(NULL, AV_LOG_INFO, "N/A");
3611 if (ic->start_time != AV_NOPTS_VALUE) {
3613 av_log(NULL, AV_LOG_INFO, ", start: ");
3614 secs = ic->start_time / AV_TIME_BASE;
3615 us = abs(ic->start_time % AV_TIME_BASE);
3616 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3617 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3619 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3621 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3623 av_log(NULL, AV_LOG_INFO, "N/A");
3625 av_log(NULL, AV_LOG_INFO, "\n");
3627 for (i = 0; i < ic->nb_chapters; i++) {
3628 AVChapter *ch = ic->chapters[i];
3629 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3630 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3631 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3633 dump_metadata(NULL, ch->metadata, " ");
3635 if(ic->nb_programs) {
3636 int j, k, total = 0;
3637 for(j=0; j<ic->nb_programs; j++) {
3638 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3640 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3641 name ? name->value : "");
3642 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3643 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3644 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3645 printed[ic->programs[j]->stream_index[k]] = 1;
3647 total += ic->programs[j]->nb_stream_indexes;
3649 if (total < ic->nb_streams)
3650 av_log(NULL, AV_LOG_INFO, " No Program\n");
3652 for(i=0;i<ic->nb_streams;i++)
3654 dump_stream_format(ic, i, index, is_output);
3659 int64_t av_gettime(void)
3662 gettimeofday(&tv,NULL);
3663 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3666 uint64_t ff_ntp_time(void)
3668 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3671 int av_get_frame_filename(char *buf, int buf_size,
3672 const char *path, int number)
3675 char *q, buf1[20], c;
3676 int nd, len, percentd_found;
3688 while (isdigit(*p)) {
3689 nd = nd * 10 + *p++ - '0';
3692 } while (isdigit(c));
3701 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3703 if ((q - buf + len) > buf_size - 1)
3705 memcpy(q, buf1, len);
3713 if ((q - buf) < buf_size - 1)
3717 if (!percentd_found)
3726 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3730 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3732 for(i=0;i<size;i+=16) {
3739 PRINT(" %02x", buf[i+j]);
3744 for(j=0;j<len;j++) {
3746 if (c < ' ' || c > '~')
3755 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3757 hex_dump_internal(NULL, f, 0, buf, size);
3760 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3762 hex_dump_internal(avcl, NULL, level, buf, size);
3765 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3768 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3769 PRINT("stream #%d:\n", pkt->stream_index);
3770 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3771 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3772 /* DTS is _always_ valid after av_read_frame() */
3774 if (pkt->dts == AV_NOPTS_VALUE)
3777 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3778 /* PTS may not be known if B-frames are present. */
3780 if (pkt->pts == AV_NOPTS_VALUE)
3783 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3785 PRINT(" size=%d\n", pkt->size);
3788 av_hex_dump(f, pkt->data, pkt->size);
3792 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3794 AVRational tb = { 1, AV_TIME_BASE };
3795 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3799 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3801 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3805 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3807 AVRational tb = { 1, AV_TIME_BASE };
3808 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3812 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3815 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3818 void av_url_split(char *proto, int proto_size,
3819 char *authorization, int authorization_size,
3820 char *hostname, int hostname_size,
3822 char *path, int path_size,
3825 const char *p, *ls, *at, *col, *brk;
3827 if (port_ptr) *port_ptr = -1;
3828 if (proto_size > 0) proto[0] = 0;
3829 if (authorization_size > 0) authorization[0] = 0;
3830 if (hostname_size > 0) hostname[0] = 0;
3831 if (path_size > 0) path[0] = 0;
3833 /* parse protocol */
3834 if ((p = strchr(url, ':'))) {
3835 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3840 /* no protocol means plain filename */
3841 av_strlcpy(path, url, path_size);
3845 /* separate path from hostname */
3846 ls = strchr(p, '/');
3848 ls = strchr(p, '?');
3850 av_strlcpy(path, ls, path_size);
3852 ls = &p[strlen(p)]; // XXX
3854 /* the rest is hostname, use that to parse auth/port */
3856 /* authorization (user[:pass]@hostname) */
3857 if ((at = strchr(p, '@')) && at < ls) {
3858 av_strlcpy(authorization, p,
3859 FFMIN(authorization_size, at + 1 - p));
3860 p = at + 1; /* skip '@' */
3863 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3865 av_strlcpy(hostname, p + 1,
3866 FFMIN(hostname_size, brk - p));
3867 if (brk[1] == ':' && port_ptr)
3868 *port_ptr = atoi(brk + 2);
3869 } else if ((col = strchr(p, ':')) && col < ls) {
3870 av_strlcpy(hostname, p,
3871 FFMIN(col + 1 - p, hostname_size));
3872 if (port_ptr) *port_ptr = atoi(col + 1);
3874 av_strlcpy(hostname, p,
3875 FFMIN(ls + 1 - p, hostname_size));
3879 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3882 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3885 'C', 'D', 'E', 'F' };
3886 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3889 'c', 'd', 'e', 'f' };
3890 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3892 for(i = 0; i < s; i++) {
3893 buff[i * 2] = hex_table[src[i] >> 4];
3894 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3900 int ff_hex_to_data(uint8_t *data, const char *p)
3907 p += strspn(p, SPACE_CHARS);
3910 c = toupper((unsigned char) *p++);
3911 if (c >= '0' && c <= '9')
3913 else if (c >= 'A' && c <= 'F')
3928 #if FF_API_SET_PTS_INFO
3929 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3930 unsigned int pts_num, unsigned int pts_den)
3932 avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
3936 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
3937 unsigned int pts_num, unsigned int pts_den)
3940 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3941 if(new_tb.num != pts_num)
3942 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3944 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3946 if(new_tb.num <= 0 || new_tb.den <= 0) {
3947 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3950 s->time_base = new_tb;
3951 s->pts_wrap_bits = pts_wrap_bits;
3954 int ff_url_join(char *str, int size, const char *proto,
3955 const char *authorization, const char *hostname,
3956 int port, const char *fmt, ...)
3959 struct addrinfo hints, *ai;
3964 av_strlcatf(str, size, "%s://", proto);
3965 if (authorization && authorization[0])
3966 av_strlcatf(str, size, "%s@", authorization);
3967 #if CONFIG_NETWORK && defined(AF_INET6)
3968 /* Determine if hostname is a numerical IPv6 address,
3969 * properly escape it within [] in that case. */
3970 memset(&hints, 0, sizeof(hints));
3971 hints.ai_flags = AI_NUMERICHOST;
3972 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3973 if (ai->ai_family == AF_INET6) {
3974 av_strlcat(str, "[", size);
3975 av_strlcat(str, hostname, size);
3976 av_strlcat(str, "]", size);
3978 av_strlcat(str, hostname, size);
3983 /* Not an IPv6 address, just output the plain string. */
3984 av_strlcat(str, hostname, size);
3987 av_strlcatf(str, size, ":%d", port);
3990 int len = strlen(str);
3993 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3999 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
4000 AVFormatContext *src)
4005 local_pkt.stream_index = dst_stream;
4006 if (pkt->pts != AV_NOPTS_VALUE)
4007 local_pkt.pts = av_rescale_q(pkt->pts,
4008 src->streams[pkt->stream_index]->time_base,
4009 dst->streams[dst_stream]->time_base);
4010 if (pkt->dts != AV_NOPTS_VALUE)
4011 local_pkt.dts = av_rescale_q(pkt->dts,
4012 src->streams[pkt->stream_index]->time_base,
4013 dst->streams[dst_stream]->time_base);
4014 return av_write_frame(dst, &local_pkt);
4017 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4020 const char *ptr = str;
4022 /* Parse key=value pairs. */
4025 char *dest = NULL, *dest_end;
4026 int key_len, dest_len = 0;
4028 /* Skip whitespace and potential commas. */
4029 while (*ptr && (isspace(*ptr) || *ptr == ','))
4036 if (!(ptr = strchr(key, '=')))
4039 key_len = ptr - key;
4041 callback_get_buf(context, key, key_len, &dest, &dest_len);
4042 dest_end = dest + dest_len - 1;
4046 while (*ptr && *ptr != '\"') {
4050 if (dest && dest < dest_end)
4054 if (dest && dest < dest_end)
4062 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
4063 if (dest && dest < dest_end)
4071 int ff_find_stream_index(AVFormatContext *s, int id)
4074 for (i = 0; i < s->nb_streams; i++) {
4075 if (s->streams[i]->id == id)
4081 void ff_make_absolute_url(char *buf, int size, const char *base,
4085 /* Absolute path, relative to the current server */
4086 if (base && strstr(base, "://") && rel[0] == '/') {
4088 av_strlcpy(buf, base, size);
4089 sep = strstr(buf, "://");
4092 sep = strchr(sep, '/');
4096 av_strlcat(buf, rel, size);
4099 /* If rel actually is an absolute url, just copy it */
4100 if (!base || strstr(rel, "://") || rel[0] == '/') {
4101 av_strlcpy(buf, rel, size);
4105 av_strlcpy(buf, base, size);
4106 /* Remove the file name from the base url */
4107 sep = strrchr(buf, '/');
4112 while (av_strstart(rel, "../", NULL) && sep) {
4113 /* Remove the path delimiter at the end */
4115 sep = strrchr(buf, '/');
4116 /* If the next directory name to pop off is "..", break here */
4117 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4118 /* Readd the slash we just removed */
4119 av_strlcat(buf, "/", size);
4122 /* Cut off the directory name */
4129 av_strlcat(buf, rel, size);
4132 int64_t ff_iso8601_to_unix_time(const char *datestr)
4135 struct tm time1 = {0}, time2 = {0};
4137 ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
4138 ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
4140 return av_timegm(&time2);
4142 return av_timegm(&time1);
4144 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4145 "the date string.\n");
4150 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
4153 if (ofmt->query_codec)
4154 return ofmt->query_codec(codec_id, std_compliance);
4155 else if (ofmt->codec_tag)
4156 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4157 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4158 codec_id == ofmt->subtitle_codec)
4161 return AVERROR_PATCHWELCOME;
4164 int avformat_network_init(void)
4168 ff_network_inited_globally = 1;
4169 if ((ret = ff_network_init()) < 0)
4176 int avformat_network_deinit(void)
4185 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4186 uint64_t channel_layout, int32_t sample_rate,
4187 int32_t width, int32_t height)
4193 return AVERROR(EINVAL);
4196 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4198 if (channel_layout) {
4200 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4204 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4206 if (width || height) {
4208 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4210 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4212 return AVERROR(ENOMEM);
4213 bytestream_put_le32(&data, flags);
4215 bytestream_put_le32(&data, channels);
4217 bytestream_put_le64(&data, channel_layout);
4219 bytestream_put_le32(&data, sample_rate);
4220 if (width || height) {
4221 bytestream_put_le32(&data, width);
4222 bytestream_put_le32(&data, height);
4227 const struct AVCodecTag *avformat_get_riff_video_tags(void)
4229 return ff_codec_bmp_tags;
4231 const struct AVCodecTag *avformat_get_riff_audio_tags(void)
4233 return ff_codec_wav_tags;