2 * various utility functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 "libavutil/opt.h"
31 #include "libavutil/avstring.h"
33 #include "audiointerleave.h"
48 * various utility functions for use within Libav
51 unsigned avformat_version(void)
53 return LIBAVFORMAT_VERSION_INT;
56 const char *avformat_configuration(void)
58 return LIBAV_CONFIGURATION;
61 const char *avformat_license(void)
63 #define LICENSE_PREFIX "libavformat license: "
64 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
67 /* fraction handling */
70 * f = val + (num / den) + 0.5.
72 * 'num' is normalized so that it is such as 0 <= num < den.
74 * @param f fractional number
75 * @param val integer value
76 * @param num must be >= 0
77 * @param den must be >= 1
79 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
92 * Fractional addition to f: f = f + (incr / f->den).
94 * @param f fractional number
95 * @param incr increment, can be positive or negative
97 static void av_frac_add(AVFrac *f, int64_t incr)
110 } else if (num >= den) {
117 /** head of registered input format linked list */
118 static AVInputFormat *first_iformat = NULL;
119 /** head of registered output format linked list */
120 static AVOutputFormat *first_oformat = NULL;
122 AVInputFormat *av_iformat_next(AVInputFormat *f)
124 if(f) return f->next;
125 else return first_iformat;
128 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
130 if(f) return f->next;
131 else return first_oformat;
134 void av_register_input_format(AVInputFormat *format)
138 while (*p != NULL) p = &(*p)->next;
143 void av_register_output_format(AVOutputFormat *format)
147 while (*p != NULL) p = &(*p)->next;
152 int av_match_ext(const char *filename, const char *extensions)
160 ext = strrchr(filename, '.');
166 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
169 if (!strcasecmp(ext1, ext))
179 static int match_format(const char *name, const char *names)
187 namelen = strlen(name);
188 while ((p = strchr(names, ','))) {
189 len = FFMAX(p - names, namelen);
190 if (!strncasecmp(name, names, len))
194 return !strcasecmp(name, names);
197 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
198 const char *mime_type)
200 AVOutputFormat *fmt = NULL, *fmt_found;
201 int score_max, score;
203 /* specific test for image sequences */
204 #if CONFIG_IMAGE2_MUXER
205 if (!short_name && filename &&
206 av_filename_number_test(filename) &&
207 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
208 return av_guess_format("image2", NULL, NULL);
211 /* Find the proper file type. */
214 while ((fmt = av_oformat_next(fmt))) {
216 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
218 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
220 if (filename && fmt->extensions &&
221 av_match_ext(filename, fmt->extensions)) {
224 if (score > score_max) {
232 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
233 const char *filename, const char *mime_type, enum AVMediaType type){
234 if(type == AVMEDIA_TYPE_VIDEO){
235 enum CodecID codec_id= CODEC_ID_NONE;
237 #if CONFIG_IMAGE2_MUXER
238 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
239 codec_id= ff_guess_image2_codec(filename);
242 if(codec_id == CODEC_ID_NONE)
243 codec_id= fmt->video_codec;
245 }else if(type == AVMEDIA_TYPE_AUDIO)
246 return fmt->audio_codec;
247 else if (type == AVMEDIA_TYPE_SUBTITLE)
248 return fmt->subtitle_codec;
250 return CODEC_ID_NONE;
253 AVInputFormat *av_find_input_format(const char *short_name)
255 AVInputFormat *fmt = NULL;
256 while ((fmt = av_iformat_next(fmt))) {
257 if (match_format(short_name, fmt->name))
264 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
266 int ret= av_new_packet(pkt, size);
271 pkt->pos= avio_tell(s);
273 ret= avio_read(s, pkt->data, size);
277 av_shrink_packet(pkt, ret);
282 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
287 return av_get_packet(s, pkt, size);
288 old_size = pkt->size;
289 ret = av_grow_packet(pkt, size);
292 ret = avio_read(s, pkt->data + old_size, size);
293 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
298 int av_filename_number_test(const char *filename)
301 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
304 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
306 AVProbeData lpd = *pd;
307 AVInputFormat *fmt1 = NULL, *fmt;
310 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
311 int id3len = ff_id3v2_tag_len(lpd.buf);
312 if (lpd.buf_size > id3len + 16) {
314 lpd.buf_size -= id3len;
320 while ((fmt1 = av_iformat_next(fmt1))) {
321 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
324 if (fmt1->read_probe) {
325 score = fmt1->read_probe(&lpd);
326 } else if (fmt1->extensions) {
327 if (av_match_ext(lpd.filename, fmt1->extensions)) {
331 if (score > *score_max) {
334 }else if (score == *score_max)
338 /* a hack for files with huge id3v2 tags -- try to guess by file extension. */
339 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4) {
340 while ((fmt = av_iformat_next(fmt)))
341 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
342 *score_max = AVPROBE_SCORE_MAX/4;
350 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
352 return av_probe_input_format2(pd, is_opened, &score);
355 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
357 static const struct {
358 const char *name; enum CodecID id; enum AVMediaType type;
360 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
361 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
362 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
363 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
364 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
365 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
366 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
367 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
370 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
374 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
375 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
376 for (i = 0; fmt_id_type[i].name; i++) {
377 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
378 st->codec->codec_id = fmt_id_type[i].id;
379 st->codec->codec_type = fmt_id_type[i].type;
387 /************************************************************/
388 /* input media file */
391 * Open a media file from an IO stream. 'fmt' must be specified.
393 int av_open_input_stream(AVFormatContext **ic_ptr,
394 AVIOContext *pb, const char *filename,
395 AVInputFormat *fmt, AVFormatParameters *ap)
399 AVFormatParameters default_ap;
403 memset(ap, 0, sizeof(default_ap));
406 if(!ap->prealloced_context)
407 ic = avformat_alloc_context();
411 err = AVERROR(ENOMEM);
416 ic->duration = AV_NOPTS_VALUE;
417 ic->start_time = AV_NOPTS_VALUE;
418 av_strlcpy(ic->filename, filename, sizeof(ic->filename));
420 /* allocate private data */
421 if (fmt->priv_data_size > 0) {
422 ic->priv_data = av_mallocz(fmt->priv_data_size);
423 if (!ic->priv_data) {
424 err = AVERROR(ENOMEM);
428 ic->priv_data = NULL;
431 // e.g. AVFMT_NOFILE formats will not have a AVIOContext
433 ff_id3v2_read(ic, ID3v2_DEFAULT_MAGIC);
435 if (ic->iformat->read_header) {
436 err = ic->iformat->read_header(ic, ap);
441 if (pb && !ic->data_offset)
442 ic->data_offset = avio_tell(ic->pb);
444 ic->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
451 av_freep(&ic->priv_data);
452 for(i=0;i<ic->nb_streams;i++) {
453 AVStream *st = ic->streams[i];
455 av_free(st->priv_data);
456 av_free(st->codec->extradata);
468 /** size of probe buffer, for guessing file type from file contents */
469 #define PROBE_BUF_MIN 2048
470 #define PROBE_BUF_MAX (1<<20)
472 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
473 const char *filename, void *logctx,
474 unsigned int offset, unsigned int max_probe_size)
476 AVProbeData pd = { filename ? filename : "", NULL, -offset };
477 unsigned char *buf = NULL;
478 int ret = 0, probe_size;
480 if (!max_probe_size) {
481 max_probe_size = PROBE_BUF_MAX;
482 } else if (max_probe_size > PROBE_BUF_MAX) {
483 max_probe_size = PROBE_BUF_MAX;
484 } else if (max_probe_size < PROBE_BUF_MIN) {
485 return AVERROR(EINVAL);
488 if (offset >= max_probe_size) {
489 return AVERROR(EINVAL);
492 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0;
493 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
494 int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
495 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
497 if (probe_size < offset) {
501 /* read probe data */
502 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
503 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
504 /* fail if error was not end of file, otherwise, lower score */
505 if (ret != AVERROR_EOF) {
510 ret = 0; /* error was end of file, nothing read */
513 pd.buf = &buf[offset];
515 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
517 /* guess file format */
518 *fmt = av_probe_input_format2(&pd, 1, &score);
520 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
521 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
523 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
529 return AVERROR_INVALIDDATA;
532 /* rewind. reuse probe buffer to avoid seeking */
533 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
539 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
542 AVFormatParameters *ap)
545 AVProbeData probe_data, *pd = &probe_data;
546 AVIOContext *pb = NULL;
547 void *logctx= ap && ap->prealloced_context ? *ic_ptr : NULL;
551 pd->filename = filename;
556 /* guess format if no file can be opened */
557 fmt = av_probe_input_format(pd, 0);
560 /* Do not open file if the format does not need it. XXX: specific
561 hack needed to handle RTSP/TCP */
562 if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
563 /* if no file needed do not try to open one */
564 if ((err=avio_open(&pb, filename, AVIO_FLAG_READ)) < 0) {
568 ffio_set_buf_size(pb, buf_size);
570 if (!fmt && (err = av_probe_input_buffer(pb, &fmt, filename, logctx, 0, logctx ? (*ic_ptr)->probesize : 0)) < 0) {
575 /* if still no format found, error */
577 err = AVERROR_INVALIDDATA;
581 /* check filename in case an image number is expected */
582 if (fmt->flags & AVFMT_NEEDNUMBER) {
583 if (!av_filename_number_test(filename)) {
584 err = AVERROR_NUMEXPECTED;
588 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
596 if (ap && ap->prealloced_context)
603 /*******************************************************/
605 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
606 AVPacketList **plast_pktl){
607 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
612 (*plast_pktl)->next = pktl;
614 *packet_buffer = pktl;
616 /* add the packet in the buffered packet list */
622 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
628 AVPacketList *pktl = s->raw_packet_buffer;
632 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
633 !s->streams[pkt->stream_index]->probe_packets ||
634 s->raw_packet_buffer_remaining_size < pkt->size){
635 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
638 s->raw_packet_buffer = pktl->next;
639 s->raw_packet_buffer_remaining_size += pkt->size;
646 ret= s->iformat->read_packet(s, pkt);
648 if (!pktl || ret == AVERROR(EAGAIN))
650 for (i = 0; i < s->nb_streams; i++)
651 s->streams[i]->probe_packets = 0;
654 st= s->streams[pkt->stream_index];
656 switch(st->codec->codec_type){
657 case AVMEDIA_TYPE_VIDEO:
658 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
660 case AVMEDIA_TYPE_AUDIO:
661 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
663 case AVMEDIA_TYPE_SUBTITLE:
664 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
668 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
672 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
673 s->raw_packet_buffer_remaining_size -= pkt->size;
675 if(st->codec->codec_id == CODEC_ID_PROBE){
676 AVProbeData *pd = &st->probe_data;
677 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
680 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
681 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
682 pd->buf_size += pkt->size;
683 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
685 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
686 //FIXME we dont reduce score to 0 for the case of running out of buffer space in bytes
687 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
688 if(st->codec->codec_id != CODEC_ID_PROBE){
691 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
698 /**********************************************************/
701 * Get the number of samples of an audio frame. Return -1 on error.
703 static int get_audio_frame_size(AVCodecContext *enc, int size)
707 if(enc->codec_id == CODEC_ID_VORBIS)
710 if (enc->frame_size <= 1) {
711 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
713 if (bits_per_sample) {
714 if (enc->channels == 0)
716 frame_size = (size << 3) / (bits_per_sample * enc->channels);
718 /* used for example by ADPCM codecs */
719 if (enc->bit_rate == 0)
721 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
724 frame_size = enc->frame_size;
731 * Return the frame duration in seconds. Return 0 if not available.
733 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
734 AVCodecParserContext *pc, AVPacket *pkt)
740 switch(st->codec->codec_type) {
741 case AVMEDIA_TYPE_VIDEO:
742 if(st->time_base.num*1000LL > st->time_base.den){
743 *pnum = st->time_base.num;
744 *pden = st->time_base.den;
745 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
746 *pnum = st->codec->time_base.num;
747 *pden = st->codec->time_base.den;
748 if (pc && pc->repeat_pict) {
749 *pnum = (*pnum) * (1 + pc->repeat_pict);
751 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
752 //Thus if we have no parser in such case leave duration undefined.
753 if(st->codec->ticks_per_frame>1 && !pc){
758 case AVMEDIA_TYPE_AUDIO:
759 frame_size = get_audio_frame_size(st->codec, pkt->size);
760 if (frame_size <= 0 || st->codec->sample_rate <= 0)
763 *pden = st->codec->sample_rate;
770 static int is_intra_only(AVCodecContext *enc){
771 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
773 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
774 switch(enc->codec_id){
776 case CODEC_ID_MJPEGB:
778 case CODEC_ID_RAWVIDEO:
779 case CODEC_ID_DVVIDEO:
780 case CODEC_ID_HUFFYUV:
781 case CODEC_ID_FFVHUFF:
786 case CODEC_ID_JPEG2000:
794 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
795 int64_t dts, int64_t pts)
797 AVStream *st= s->streams[stream_index];
798 AVPacketList *pktl= s->packet_buffer;
800 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
803 st->first_dts= dts - st->cur_dts;
806 for(; pktl; pktl= pktl->next){
807 if(pktl->pkt.stream_index != stream_index)
809 //FIXME think more about this check
810 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
811 pktl->pkt.pts += st->first_dts;
813 if(pktl->pkt.dts != AV_NOPTS_VALUE)
814 pktl->pkt.dts += st->first_dts;
816 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
817 st->start_time= pktl->pkt.pts;
819 if (st->start_time == AV_NOPTS_VALUE)
820 st->start_time = pts;
823 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
825 AVPacketList *pktl= s->packet_buffer;
828 if(st->first_dts != AV_NOPTS_VALUE){
829 cur_dts= st->first_dts;
830 for(; pktl; pktl= pktl->next){
831 if(pktl->pkt.stream_index == pkt->stream_index){
832 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
834 cur_dts -= pkt->duration;
837 pktl= s->packet_buffer;
838 st->first_dts = cur_dts;
839 }else if(st->cur_dts)
842 for(; pktl; pktl= pktl->next){
843 if(pktl->pkt.stream_index != pkt->stream_index)
845 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
846 && !pktl->pkt.duration){
847 pktl->pkt.dts= cur_dts;
848 if(!st->codec->has_b_frames)
849 pktl->pkt.pts= cur_dts;
850 cur_dts += pkt->duration;
851 pktl->pkt.duration= pkt->duration;
855 if(st->first_dts == AV_NOPTS_VALUE)
856 st->cur_dts= cur_dts;
859 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
860 AVCodecParserContext *pc, AVPacket *pkt)
862 int num, den, presentation_delayed, delay, i;
865 if (s->flags & AVFMT_FLAG_NOFILLIN)
868 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
869 pkt->dts= AV_NOPTS_VALUE;
871 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == FF_B_TYPE)
872 //FIXME Set low_delay = 0 when has_b_frames = 1
873 st->codec->has_b_frames = 1;
875 /* do we have a video B-frame ? */
876 delay= st->codec->has_b_frames;
877 presentation_delayed = 0;
879 // ignore delay caused by frame threading so that the mpeg2-without-dts
880 // warning will not trigger
881 if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
882 delay -= st->codec->thread_count-1;
884 /* XXX: need has_b_frame, but cannot get it if the codec is
887 pc && pc->pict_type != FF_B_TYPE)
888 presentation_delayed = 1;
890 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
891 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
892 pkt->dts -= 1LL<<st->pts_wrap_bits;
895 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
896 // we take the conservative approach and discard both
897 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
898 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
899 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
900 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
903 if (pkt->duration == 0) {
904 compute_frame_duration(&num, &den, st, pc, pkt);
906 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
908 if(pkt->duration != 0 && s->packet_buffer)
909 update_initial_durations(s, st, pkt);
913 /* correct timestamps with byte offset if demuxers only have timestamps
914 on packet boundaries */
915 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
916 /* this will estimate bitrate based on this frame's duration and size */
917 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
918 if(pkt->pts != AV_NOPTS_VALUE)
920 if(pkt->dts != AV_NOPTS_VALUE)
924 if (pc && pc->dts_sync_point >= 0) {
925 // we have synchronization info from the parser
926 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
928 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
929 if (pkt->dts != AV_NOPTS_VALUE) {
930 // got DTS from the stream, update reference timestamp
931 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
932 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
933 } else if (st->reference_dts != AV_NOPTS_VALUE) {
934 // compute DTS based on reference timestamp
935 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
936 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
938 if (pc->dts_sync_point > 0)
939 st->reference_dts = pkt->dts; // new reference
943 /* This may be redundant, but it should not hurt. */
944 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
945 presentation_delayed = 1;
947 // 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);
948 /* interpolate PTS and DTS if they are not present */
949 //We skip H264 currently because delay and has_b_frames are not reliably set
950 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
951 if (presentation_delayed) {
952 /* DTS = decompression timestamp */
953 /* PTS = presentation timestamp */
954 if (pkt->dts == AV_NOPTS_VALUE)
955 pkt->dts = st->last_IP_pts;
956 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
957 if (pkt->dts == AV_NOPTS_VALUE)
958 pkt->dts = st->cur_dts;
960 /* this is tricky: the dts must be incremented by the duration
961 of the frame we are displaying, i.e. the last I- or P-frame */
962 if (st->last_IP_duration == 0)
963 st->last_IP_duration = pkt->duration;
964 if(pkt->dts != AV_NOPTS_VALUE)
965 st->cur_dts = pkt->dts + st->last_IP_duration;
966 st->last_IP_duration = pkt->duration;
967 st->last_IP_pts= pkt->pts;
968 /* cannot compute PTS if not present (we can compute it only
969 by knowing the future */
970 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
971 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
972 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
973 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
974 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
975 pkt->pts += pkt->duration;
976 // 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);
980 /* presentation is not delayed : PTS and DTS are the same */
981 if(pkt->pts == AV_NOPTS_VALUE)
983 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
984 if(pkt->pts == AV_NOPTS_VALUE)
985 pkt->pts = st->cur_dts;
987 if(pkt->pts != AV_NOPTS_VALUE)
988 st->cur_dts = pkt->pts + pkt->duration;
992 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
993 st->pts_buffer[0]= pkt->pts;
994 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
995 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
996 if(pkt->dts == AV_NOPTS_VALUE)
997 pkt->dts= st->pts_buffer[0];
998 if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
999 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1001 if(pkt->dts > st->cur_dts)
1002 st->cur_dts = pkt->dts;
1005 // 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);
1008 if(is_intra_only(st->codec))
1009 pkt->flags |= AV_PKT_FLAG_KEY;
1012 /* keyframe computation */
1013 if (pc->key_frame == 1)
1014 pkt->flags |= AV_PKT_FLAG_KEY;
1015 else if (pc->key_frame == -1 && pc->pict_type == FF_I_TYPE)
1016 pkt->flags |= AV_PKT_FLAG_KEY;
1019 pkt->convergence_duration = pc->convergence_duration;
1023 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1028 av_init_packet(pkt);
1031 /* select current input stream component */
1034 if (!st->need_parsing || !st->parser) {
1035 /* no parsing needed: we just output the packet as is */
1036 /* raw data support */
1037 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1038 compute_pkt_fields(s, st, NULL, pkt);
1040 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1041 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1042 ff_reduce_index(s, st->index);
1043 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1046 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1047 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1048 st->cur_ptr, st->cur_len,
1049 st->cur_pkt.pts, st->cur_pkt.dts,
1051 st->cur_pkt.pts = AV_NOPTS_VALUE;
1052 st->cur_pkt.dts = AV_NOPTS_VALUE;
1053 /* increment read pointer */
1057 /* return packet if any */
1061 pkt->stream_index = st->index;
1062 pkt->pts = st->parser->pts;
1063 pkt->dts = st->parser->dts;
1064 pkt->pos = st->parser->pos;
1065 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1067 pkt->destruct= st->cur_pkt.destruct;
1068 st->cur_pkt.destruct= NULL;
1069 st->cur_pkt.data = NULL;
1070 assert(st->cur_len == 0);
1072 pkt->destruct = NULL;
1074 compute_pkt_fields(s, st, st->parser, pkt);
1076 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1077 ff_reduce_index(s, st->index);
1078 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1079 0, 0, AVINDEX_KEYFRAME);
1086 av_free_packet(&st->cur_pkt);
1091 /* read next packet */
1092 ret = av_read_packet(s, &cur_pkt);
1094 if (ret == AVERROR(EAGAIN))
1096 /* return the last frames, if any */
1097 for(i = 0; i < s->nb_streams; i++) {
1099 if (st->parser && st->need_parsing) {
1100 av_parser_parse2(st->parser, st->codec,
1101 &pkt->data, &pkt->size,
1103 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1109 /* no more packets: really terminate parsing */
1112 st = s->streams[cur_pkt.stream_index];
1113 st->cur_pkt= cur_pkt;
1115 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1116 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1117 st->cur_pkt.pts < st->cur_pkt.dts){
1118 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1119 st->cur_pkt.stream_index,
1123 // av_free_packet(&st->cur_pkt);
1127 if(s->debug & FF_FDEBUG_TS)
1128 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1129 st->cur_pkt.stream_index,
1133 st->cur_pkt.duration,
1137 st->cur_ptr = st->cur_pkt.data;
1138 st->cur_len = st->cur_pkt.size;
1139 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1140 st->parser = av_parser_init(st->codec->codec_id);
1142 /* no parser available: just output the raw packets */
1143 st->need_parsing = AVSTREAM_PARSE_NONE;
1144 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1145 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1146 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1147 st->parser->flags |= PARSER_FLAG_ONCE;
1152 if(s->debug & FF_FDEBUG_TS)
1153 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1164 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1168 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1171 pktl = s->packet_buffer;
1173 AVPacket *next_pkt= &pktl->pkt;
1175 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1176 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1177 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1178 if( pktl->pkt.stream_index == next_pkt->stream_index
1179 && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1180 && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1181 next_pkt->pts= pktl->pkt.dts;
1185 pktl = s->packet_buffer;
1188 if( next_pkt->pts != AV_NOPTS_VALUE
1189 || next_pkt->dts == AV_NOPTS_VALUE
1191 /* read packet from packet buffer, if there is data */
1193 s->packet_buffer = pktl->next;
1199 int ret= av_read_frame_internal(s, pkt);
1201 if(pktl && ret != AVERROR(EAGAIN)){
1208 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1209 &s->packet_buffer_end)) < 0)
1210 return AVERROR(ENOMEM);
1212 assert(!s->packet_buffer);
1213 return av_read_frame_internal(s, pkt);
1218 /* XXX: suppress the packet queue */
1219 static void flush_packet_queue(AVFormatContext *s)
1224 pktl = s->packet_buffer;
1227 s->packet_buffer = pktl->next;
1228 av_free_packet(&pktl->pkt);
1231 while(s->raw_packet_buffer){
1232 pktl = s->raw_packet_buffer;
1233 s->raw_packet_buffer = pktl->next;
1234 av_free_packet(&pktl->pkt);
1237 s->packet_buffer_end=
1238 s->raw_packet_buffer_end= NULL;
1239 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1242 /*******************************************************/
1245 int av_find_default_stream_index(AVFormatContext *s)
1247 int first_audio_index = -1;
1251 if (s->nb_streams <= 0)
1253 for(i = 0; i < s->nb_streams; i++) {
1255 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1258 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1259 first_audio_index = i;
1261 return first_audio_index >= 0 ? first_audio_index : 0;
1265 * Flush the frame reader.
1267 void ff_read_frame_flush(AVFormatContext *s)
1272 flush_packet_queue(s);
1276 /* for each stream, reset read state */
1277 for(i = 0; i < s->nb_streams; i++) {
1281 av_parser_close(st->parser);
1283 av_free_packet(&st->cur_pkt);
1285 st->last_IP_pts = AV_NOPTS_VALUE;
1286 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1287 st->reference_dts = AV_NOPTS_VALUE;
1292 st->probe_packets = MAX_PROBE_PACKETS;
1294 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1295 st->pts_buffer[j]= AV_NOPTS_VALUE;
1299 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1302 for(i = 0; i < s->nb_streams; i++) {
1303 AVStream *st = s->streams[i];
1305 st->cur_dts = av_rescale(timestamp,
1306 st->time_base.den * (int64_t)ref_st->time_base.num,
1307 st->time_base.num * (int64_t)ref_st->time_base.den);
1311 void ff_reduce_index(AVFormatContext *s, int stream_index)
1313 AVStream *st= s->streams[stream_index];
1314 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1316 if((unsigned)st->nb_index_entries >= max_entries){
1318 for(i=0; 2*i<st->nb_index_entries; i++)
1319 st->index_entries[i]= st->index_entries[2*i];
1320 st->nb_index_entries= i;
1324 int ff_add_index_entry(AVIndexEntry **index_entries,
1325 int *nb_index_entries,
1326 unsigned int *index_entries_allocated_size,
1327 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1329 AVIndexEntry *entries, *ie;
1332 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1335 entries = av_fast_realloc(*index_entries,
1336 index_entries_allocated_size,
1337 (*nb_index_entries + 1) *
1338 sizeof(AVIndexEntry));
1342 *index_entries= entries;
1344 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1347 index= (*nb_index_entries)++;
1348 ie= &entries[index];
1349 assert(index==0 || ie[-1].timestamp < timestamp);
1351 ie= &entries[index];
1352 if(ie->timestamp != timestamp){
1353 if(ie->timestamp <= timestamp)
1355 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1356 (*nb_index_entries)++;
1357 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1358 distance= ie->min_distance;
1362 ie->timestamp = timestamp;
1363 ie->min_distance= distance;
1370 int av_add_index_entry(AVStream *st,
1371 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1373 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1374 &st->index_entries_allocated_size, pos,
1375 timestamp, size, distance, flags);
1378 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1379 int64_t wanted_timestamp, int flags)
1387 //optimize appending index entries at the end
1388 if(b && entries[b-1].timestamp < wanted_timestamp)
1393 timestamp = entries[m].timestamp;
1394 if(timestamp >= wanted_timestamp)
1396 if(timestamp <= wanted_timestamp)
1399 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1401 if(!(flags & AVSEEK_FLAG_ANY)){
1402 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1403 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1412 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1415 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1416 wanted_timestamp, flags);
1421 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1422 AVInputFormat *avif= s->iformat;
1423 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1424 int64_t ts_min, ts_max, ts;
1429 if (stream_index < 0)
1433 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1437 ts_min= AV_NOPTS_VALUE;
1438 pos_limit= -1; //gcc falsely says it may be uninitialized
1440 st= s->streams[stream_index];
1441 if(st->index_entries){
1444 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()
1445 index= FFMAX(index, 0);
1446 e= &st->index_entries[index];
1448 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1450 ts_min= e->timestamp;
1452 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1459 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1460 assert(index < st->nb_index_entries);
1462 e= &st->index_entries[index];
1463 assert(e->timestamp >= target_ts);
1465 ts_max= e->timestamp;
1466 pos_limit= pos_max - e->min_distance;
1468 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1469 pos_max,pos_limit, ts_max);
1474 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1479 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1482 av_update_cur_dts(s, st, ts);
1487 int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){
1489 int64_t start_pos, filesize;
1493 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1496 if(ts_min == AV_NOPTS_VALUE){
1497 pos_min = s->data_offset;
1498 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1499 if (ts_min == AV_NOPTS_VALUE)
1503 if(ts_max == AV_NOPTS_VALUE){
1505 filesize = avio_size(s->pb);
1506 pos_max = filesize - 1;
1509 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1511 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1512 if (ts_max == AV_NOPTS_VALUE)
1516 int64_t tmp_pos= pos_max + 1;
1517 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1518 if(tmp_ts == AV_NOPTS_VALUE)
1522 if(tmp_pos >= filesize)
1528 if(ts_min > ts_max){
1530 }else if(ts_min == ts_max){
1535 while (pos_min < pos_limit) {
1537 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1541 assert(pos_limit <= pos_max);
1544 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1545 // interpolate position (better than dichotomy)
1546 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1547 + pos_min - approximate_keyframe_distance;
1548 }else if(no_change==1){
1549 // bisection, if interpolation failed to change min or max pos last time
1550 pos = (pos_min + pos_limit)>>1;
1552 /* linear search if bisection failed, can only happen if there
1553 are very few or no keyframes between min/max */
1558 else if(pos > pos_limit)
1562 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1568 av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1569 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit,
1570 start_pos, no_change);
1572 if(ts == AV_NOPTS_VALUE){
1573 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1576 assert(ts != AV_NOPTS_VALUE);
1577 if (target_ts <= ts) {
1578 pos_limit = start_pos - 1;
1582 if (target_ts >= ts) {
1588 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1589 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1592 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1594 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1595 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1596 pos, ts_min, target_ts, ts_max);
1602 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1603 int64_t pos_min, pos_max;
1607 if (stream_index < 0)
1610 st= s->streams[stream_index];
1613 pos_min = s->data_offset;
1614 pos_max = avio_size(s->pb) - 1;
1616 if (pos < pos_min) pos= pos_min;
1617 else if(pos > pos_max) pos= pos_max;
1619 avio_seek(s->pb, pos, SEEK_SET);
1622 av_update_cur_dts(s, st, ts);
1627 static int av_seek_frame_generic(AVFormatContext *s,
1628 int stream_index, int64_t timestamp, int flags)
1635 st = s->streams[stream_index];
1637 index = av_index_search_timestamp(st, timestamp, flags);
1639 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1642 if(index < 0 || index==st->nb_index_entries-1){
1646 if(st->nb_index_entries){
1647 assert(st->index_entries);
1648 ie= &st->index_entries[st->nb_index_entries-1];
1649 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1651 av_update_cur_dts(s, st, ie->timestamp);
1653 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1659 ret = av_read_frame(s, &pkt);
1660 }while(ret == AVERROR(EAGAIN));
1663 av_free_packet(&pkt);
1664 if(stream_index == pkt.stream_index){
1665 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1669 index = av_index_search_timestamp(st, timestamp, flags);
1674 ff_read_frame_flush(s);
1675 if (s->iformat->read_seek){
1676 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1679 ie = &st->index_entries[index];
1680 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1682 av_update_cur_dts(s, st, ie->timestamp);
1687 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1692 ff_read_frame_flush(s);
1694 if(flags & AVSEEK_FLAG_BYTE)
1695 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1697 if(stream_index < 0){
1698 stream_index= av_find_default_stream_index(s);
1699 if(stream_index < 0)
1702 st= s->streams[stream_index];
1703 /* timestamp for default must be expressed in AV_TIME_BASE units */
1704 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1707 /* first, we try the format specific seek */
1708 if (s->iformat->read_seek)
1709 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1716 if(s->iformat->read_timestamp)
1717 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1719 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1722 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1724 if(min_ts > ts || max_ts < ts)
1727 ff_read_frame_flush(s);
1729 if (s->iformat->read_seek2)
1730 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1732 if(s->iformat->read_timestamp){
1733 //try to seek via read_timestamp()
1736 //Fallback to old API if new is not implemented but old is
1737 //Note the old has somewat different sematics
1738 if(s->iformat->read_seek || 1)
1739 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1741 // try some generic seek like av_seek_frame_generic() but with new ts semantics
1744 /*******************************************************/
1747 * Return TRUE if the stream has accurate duration in any stream.
1749 * @return TRUE if the stream has accurate duration for at least one component.
1751 static int av_has_duration(AVFormatContext *ic)
1756 for(i = 0;i < ic->nb_streams; i++) {
1757 st = ic->streams[i];
1758 if (st->duration != AV_NOPTS_VALUE)
1765 * Estimate the stream timings from the one of each components.
1767 * Also computes the global bitrate if possible.
1769 static void av_update_stream_timings(AVFormatContext *ic)
1771 int64_t start_time, start_time1, end_time, end_time1;
1772 int64_t duration, duration1;
1776 start_time = INT64_MAX;
1777 end_time = INT64_MIN;
1778 duration = INT64_MIN;
1779 for(i = 0;i < ic->nb_streams; i++) {
1780 st = ic->streams[i];
1781 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1782 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1783 if (start_time1 < start_time)
1784 start_time = start_time1;
1785 if (st->duration != AV_NOPTS_VALUE) {
1786 end_time1 = start_time1
1787 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1788 if (end_time1 > end_time)
1789 end_time = end_time1;
1792 if (st->duration != AV_NOPTS_VALUE) {
1793 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1794 if (duration1 > duration)
1795 duration = duration1;
1798 if (start_time != INT64_MAX) {
1799 ic->start_time = start_time;
1800 if (end_time != INT64_MIN) {
1801 if (end_time - start_time > duration)
1802 duration = end_time - start_time;
1805 if (duration != INT64_MIN) {
1806 ic->duration = duration;
1807 if (ic->file_size > 0) {
1808 /* compute the bitrate */
1809 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1810 (double)ic->duration;
1815 static void fill_all_stream_timings(AVFormatContext *ic)
1820 av_update_stream_timings(ic);
1821 for(i = 0;i < ic->nb_streams; i++) {
1822 st = ic->streams[i];
1823 if (st->start_time == AV_NOPTS_VALUE) {
1824 if(ic->start_time != AV_NOPTS_VALUE)
1825 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1826 if(ic->duration != AV_NOPTS_VALUE)
1827 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1832 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1834 int64_t filesize, duration;
1838 /* if bit_rate is already set, we believe it */
1839 if (ic->bit_rate <= 0) {
1841 for(i=0;i<ic->nb_streams;i++) {
1842 st = ic->streams[i];
1843 if (st->codec->bit_rate > 0)
1844 bit_rate += st->codec->bit_rate;
1846 ic->bit_rate = bit_rate;
1849 /* if duration is already set, we believe it */
1850 if (ic->duration == AV_NOPTS_VALUE &&
1851 ic->bit_rate != 0 &&
1852 ic->file_size != 0) {
1853 filesize = ic->file_size;
1855 for(i = 0; i < ic->nb_streams; i++) {
1856 st = ic->streams[i];
1857 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1858 if (st->duration == AV_NOPTS_VALUE)
1859 st->duration = duration;
1865 #define DURATION_MAX_READ_SIZE 250000
1866 #define DURATION_MAX_RETRY 3
1868 /* only usable for MPEG-PS streams */
1869 static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1871 AVPacket pkt1, *pkt = &pkt1;
1873 int read_size, i, ret;
1875 int64_t filesize, offset, duration;
1880 /* flush packet queue */
1881 flush_packet_queue(ic);
1883 for (i=0; i<ic->nb_streams; i++) {
1884 st = ic->streams[i];
1885 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1886 av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
1889 av_parser_close(st->parser);
1891 av_free_packet(&st->cur_pkt);
1895 /* estimate the end time (duration) */
1896 /* XXX: may need to support wrapping */
1897 filesize = ic->file_size;
1898 end_time = AV_NOPTS_VALUE;
1900 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1904 avio_seek(ic->pb, offset, SEEK_SET);
1907 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1911 ret = av_read_packet(ic, pkt);
1912 }while(ret == AVERROR(EAGAIN));
1915 read_size += pkt->size;
1916 st = ic->streams[pkt->stream_index];
1917 if (pkt->pts != AV_NOPTS_VALUE &&
1918 (st->start_time != AV_NOPTS_VALUE ||
1919 st->first_dts != AV_NOPTS_VALUE)) {
1920 duration = end_time = pkt->pts;
1921 if (st->start_time != AV_NOPTS_VALUE) duration -= st->start_time;
1922 else duration -= st->first_dts;
1924 duration += 1LL<<st->pts_wrap_bits;
1926 if (st->duration == AV_NOPTS_VALUE ||
1927 st->duration < duration)
1928 st->duration = duration;
1931 av_free_packet(pkt);
1933 }while( end_time==AV_NOPTS_VALUE
1934 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1935 && ++retry <= DURATION_MAX_RETRY);
1937 fill_all_stream_timings(ic);
1939 avio_seek(ic->pb, old_offset, SEEK_SET);
1940 for (i=0; i<ic->nb_streams; i++) {
1942 st->cur_dts= st->first_dts;
1943 st->last_IP_pts = AV_NOPTS_VALUE;
1947 static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
1951 /* get the file size, if possible */
1952 if (ic->iformat->flags & AVFMT_NOFILE) {
1955 file_size = avio_size(ic->pb);
1959 ic->file_size = file_size;
1961 if ((!strcmp(ic->iformat->name, "mpeg") ||
1962 !strcmp(ic->iformat->name, "mpegts")) &&
1963 file_size && ic->pb->seekable) {
1964 /* get accurate estimate from the PTSes */
1965 av_estimate_timings_from_pts(ic, old_offset);
1966 } else if (av_has_duration(ic)) {
1967 /* at least one component has timings - we use them for all
1969 fill_all_stream_timings(ic);
1971 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
1972 /* less precise: use bitrate info */
1973 av_estimate_timings_from_bit_rate(ic);
1975 av_update_stream_timings(ic);
1981 for(i = 0;i < ic->nb_streams; i++) {
1982 st = ic->streams[i];
1983 printf("%d: start_time: %0.3f duration: %0.3f\n",
1984 i, (double)st->start_time / AV_TIME_BASE,
1985 (double)st->duration / AV_TIME_BASE);
1987 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1988 (double)ic->start_time / AV_TIME_BASE,
1989 (double)ic->duration / AV_TIME_BASE,
1990 ic->bit_rate / 1000);
1995 static int has_codec_parameters(AVCodecContext *enc)
1998 switch(enc->codec_type) {
1999 case AVMEDIA_TYPE_AUDIO:
2000 val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
2001 if(!enc->frame_size &&
2002 (enc->codec_id == CODEC_ID_VORBIS ||
2003 enc->codec_id == CODEC_ID_AAC ||
2004 enc->codec_id == CODEC_ID_MP1 ||
2005 enc->codec_id == CODEC_ID_MP2 ||
2006 enc->codec_id == CODEC_ID_MP3 ||
2007 enc->codec_id == CODEC_ID_SPEEX))
2010 case AVMEDIA_TYPE_VIDEO:
2011 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2017 return enc->codec_id != CODEC_ID_NONE && val != 0;
2020 static int has_decode_delay_been_guessed(AVStream *st)
2022 return st->codec->codec_id != CODEC_ID_H264 ||
2023 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2026 static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2030 int got_picture, data_size, ret=0;
2033 if(!st->codec->codec){
2034 codec = avcodec_find_decoder(st->codec->codec_id);
2037 ret = avcodec_open(st->codec, codec);
2042 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2043 switch(st->codec->codec_type) {
2044 case AVMEDIA_TYPE_VIDEO:
2045 avcodec_get_frame_defaults(&picture);
2046 ret = avcodec_decode_video2(st->codec, &picture,
2047 &got_picture, avpkt);
2049 case AVMEDIA_TYPE_AUDIO:
2050 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2051 samples = av_malloc(data_size);
2054 ret = avcodec_decode_audio3(st->codec, samples,
2066 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2068 while (tags->id != CODEC_ID_NONE) {
2076 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2079 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2080 if(tag == tags[i].tag)
2083 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2084 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2087 return CODEC_ID_NONE;
2090 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2093 for(i=0; tags && tags[i]; i++){
2094 int tag= ff_codec_get_tag(tags[i], id);
2100 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2103 for(i=0; tags && tags[i]; i++){
2104 enum CodecID id= ff_codec_get_id(tags[i], tag);
2105 if(id!=CODEC_ID_NONE) return id;
2107 return CODEC_ID_NONE;
2110 static void compute_chapters_end(AVFormatContext *s)
2113 int64_t max_time = s->duration + (s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time;
2115 for (i = 0; i < s->nb_chapters; i++)
2116 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2117 AVChapter *ch = s->chapters[i];
2118 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2121 for (j = 0; j < s->nb_chapters; j++) {
2122 AVChapter *ch1 = s->chapters[j];
2123 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2124 if (j != i && next_start > ch->start && next_start < end)
2127 ch->end = (end == INT64_MAX) ? ch->start : end;
2131 static int get_std_framerate(int i){
2132 if(i<60*12) return i*1001;
2133 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2137 * Is the time base unreliable.
2138 * This is a heuristic to balance between quick acceptance of the values in
2139 * the headers vs. some extra checks.
2140 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2141 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2142 * And there are "variable" fps files this needs to detect as well.
2144 static int tb_unreliable(AVCodecContext *c){
2145 if( c->time_base.den >= 101L*c->time_base.num
2146 || c->time_base.den < 5L*c->time_base.num
2147 /* || c->codec_tag == AV_RL32("DIVX")
2148 || c->codec_tag == AV_RL32("XVID")*/
2149 || c->codec_id == CODEC_ID_MPEG2VIDEO
2150 || c->codec_id == CODEC_ID_H264
2156 int av_find_stream_info(AVFormatContext *ic)
2158 int i, count, ret, read_size, j;
2160 AVPacket pkt1, *pkt;
2161 int64_t old_offset = avio_tell(ic->pb);
2163 for(i=0;i<ic->nb_streams;i++) {
2165 st = ic->streams[i];
2166 if (st->codec->codec_id == CODEC_ID_AAC) {
2167 st->codec->sample_rate = 0;
2168 st->codec->frame_size = 0;
2169 st->codec->channels = 0;
2171 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2172 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2173 /* if(!st->time_base.num)
2175 if(!st->codec->time_base.num)
2176 st->codec->time_base= st->time_base;
2178 //only for the split stuff
2179 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2180 st->parser = av_parser_init(st->codec->codec_id);
2181 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2182 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2185 assert(!st->codec->codec);
2186 codec = avcodec_find_decoder(st->codec->codec_id);
2188 /* Force decoding of at least one frame of codec data
2189 * this makes sure the codec initializes the channel configuration
2190 * and does not trust the values from the container.
2192 if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
2193 st->codec->channels = 0;
2195 /* Ensure that subtitle_header is properly set. */
2196 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2197 && codec && !st->codec->codec)
2198 avcodec_open(st->codec, codec);
2200 //try to just open decoders, in case this is enough to get parameters
2201 if(!has_codec_parameters(st->codec)){
2202 if (codec && !st->codec->codec)
2203 avcodec_open(st->codec, codec);
2207 for (i=0; i<ic->nb_streams; i++) {
2208 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2214 if(url_interrupt_cb()){
2216 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2220 /* check if one codec still needs to be handled */
2221 for(i=0;i<ic->nb_streams;i++) {
2222 st = ic->streams[i];
2223 if (!has_codec_parameters(st->codec))
2225 /* variable fps and no guess at the real fps */
2226 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2227 && st->info->duration_count<20 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2229 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2231 if(st->first_dts == AV_NOPTS_VALUE)
2234 if (i == ic->nb_streams) {
2235 /* NOTE: if the format has no header, then we need to read
2236 some packets to get most of the streams, so we cannot
2238 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2239 /* if we found the info for all the codecs, we can stop */
2241 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2245 /* we did not get all the codec info, but we read too much data */
2246 if (read_size >= ic->probesize) {
2248 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2252 /* NOTE: a new stream can be added there if no header in file
2253 (AVFMTCTX_NOHEADER) */
2254 ret = av_read_frame_internal(ic, &pkt1);
2255 if (ret < 0 && ret != AVERROR(EAGAIN)) {
2257 ret = -1; /* we could not have all the codec parameters before EOF */
2258 for(i=0;i<ic->nb_streams;i++) {
2259 st = ic->streams[i];
2260 if (!has_codec_parameters(st->codec)){
2262 avcodec_string(buf, sizeof(buf), st->codec, 0);
2263 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2271 if (ret == AVERROR(EAGAIN))
2274 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2275 if ((ret = av_dup_packet(pkt)) < 0)
2276 goto find_stream_info_err;
2278 read_size += pkt->size;
2280 st = ic->streams[pkt->stream_index];
2281 if (st->codec_info_nb_frames>1) {
2282 if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2283 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2286 st->info->codec_info_duration += pkt->duration;
2289 int64_t last = st->info->last_dts;
2290 int64_t duration= pkt->dts - last;
2292 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2293 double dur= duration * av_q2d(st->time_base);
2295 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2296 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2297 if (st->info->duration_count < 2)
2298 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2299 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2300 int framerate= get_std_framerate(i);
2301 int ticks= lrintf(dur*framerate/(1001*12));
2302 double error= dur - ticks*1001*12/(double)framerate;
2303 st->info->duration_error[i] += error*error;
2305 st->info->duration_count++;
2306 // ignore the first 4 values, they might have some random jitter
2307 if (st->info->duration_count > 3)
2308 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2310 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2311 st->info->last_dts = pkt->dts;
2313 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2314 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2316 st->codec->extradata_size= i;
2317 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2318 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2319 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2323 /* if still no information, we try to open the codec and to
2324 decompress the frame. We try to avoid that in most cases as
2325 it takes longer and uses more memory. For MPEG-4, we need to
2326 decompress for QuickTime. */
2327 if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
2328 try_decode_frame(st, pkt);
2330 st->codec_info_nb_frames++;
2334 // close codecs which were opened in try_decode_frame()
2335 for(i=0;i<ic->nb_streams;i++) {
2336 st = ic->streams[i];
2337 if(st->codec->codec)
2338 avcodec_close(st->codec);
2340 for(i=0;i<ic->nb_streams;i++) {
2341 st = ic->streams[i];
2342 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2343 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2344 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2345 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2346 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2347 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
2348 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2350 // the check for tb_unreliable() is not completely correct, since this is not about handling
2351 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2352 // ipmovie.c produces.
2353 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2354 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);
2355 if (st->info->duration_count && !st->r_frame_rate.num
2356 && tb_unreliable(st->codec) /*&&
2357 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2358 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2360 double best_error= 2*av_q2d(st->time_base);
2361 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2363 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2364 double error = st->info->duration_error[j] * get_std_framerate(j);
2365 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2366 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2367 if(error < best_error){
2369 num = get_std_framerate(j);
2372 // do not increase frame rate by more than 1 % in order to match a standard rate.
2373 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2374 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2377 if (!st->r_frame_rate.num){
2378 if( st->codec->time_base.den * (int64_t)st->time_base.num
2379 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2380 st->r_frame_rate.num = st->codec->time_base.den;
2381 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2383 st->r_frame_rate.num = st->time_base.den;
2384 st->r_frame_rate.den = st->time_base.num;
2387 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2388 if(!st->codec->bits_per_coded_sample)
2389 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2390 // set stream disposition based on audio service type
2391 switch (st->codec->audio_service_type) {
2392 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2393 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2394 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2395 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2396 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2397 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2398 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2399 st->disposition = AV_DISPOSITION_COMMENT; break;
2400 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2401 st->disposition = AV_DISPOSITION_KARAOKE; break;
2406 av_estimate_timings(ic, old_offset);
2408 compute_chapters_end(ic);
2411 /* correct DTS for B-frame streams with no timestamps */
2412 for(i=0;i<ic->nb_streams;i++) {
2413 st = ic->streams[i];
2414 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2416 ppktl = &ic->packet_buffer;
2418 if(ppkt1->stream_index != i)
2420 if(ppkt1->pkt->dts < 0)
2422 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2424 ppkt1->pkt->dts -= delta;
2429 st->cur_dts -= delta;
2435 find_stream_info_err:
2436 for (i=0; i < ic->nb_streams; i++)
2437 av_freep(&ic->streams[i]->info);
2441 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2445 for (i = 0; i < ic->nb_programs; i++)
2446 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2447 if (ic->programs[i]->stream_index[j] == s)
2448 return ic->programs[i];
2452 int av_find_best_stream(AVFormatContext *ic,
2453 enum AVMediaType type,
2454 int wanted_stream_nb,
2456 AVCodec **decoder_ret,
2459 int i, nb_streams = ic->nb_streams, stream_number = 0;
2460 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2461 unsigned *program = NULL;
2462 AVCodec *decoder = NULL, *best_decoder = NULL;
2464 if (related_stream >= 0 && wanted_stream_nb < 0) {
2465 AVProgram *p = find_program_from_stream(ic, related_stream);
2467 program = p->stream_index;
2468 nb_streams = p->nb_stream_indexes;
2471 for (i = 0; i < nb_streams; i++) {
2472 AVStream *st = ic->streams[program ? program[i] : i];
2473 AVCodecContext *avctx = st->codec;
2474 if (avctx->codec_type != type)
2476 if (wanted_stream_nb >= 0 && stream_number++ != wanted_stream_nb)
2478 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2481 decoder = avcodec_find_decoder(ic->streams[i]->codec->codec_id);
2484 ret = AVERROR_DECODER_NOT_FOUND;
2488 if (best_count >= st->codec_info_nb_frames)
2490 best_count = st->codec_info_nb_frames;
2491 ret = program ? program[i] : i;
2492 best_decoder = decoder;
2493 if (program && i == nb_streams - 1 && ret < 0) {
2495 nb_streams = ic->nb_streams;
2496 i = 0; /* no related stream found, try again with everything */
2500 *decoder_ret = best_decoder;
2504 /*******************************************************/
2506 int av_read_play(AVFormatContext *s)
2508 if (s->iformat->read_play)
2509 return s->iformat->read_play(s);
2511 return avio_pause(s->pb, 0);
2512 return AVERROR(ENOSYS);
2515 int av_read_pause(AVFormatContext *s)
2517 if (s->iformat->read_pause)
2518 return s->iformat->read_pause(s);
2520 return avio_pause(s->pb, 1);
2521 return AVERROR(ENOSYS);
2524 void av_close_input_stream(AVFormatContext *s)
2526 flush_packet_queue(s);
2527 if (s->iformat->read_close)
2528 s->iformat->read_close(s);
2529 avformat_free_context(s);
2532 void avformat_free_context(AVFormatContext *s)
2537 for(i=0;i<s->nb_streams;i++) {
2538 /* free all data in a stream component */
2541 av_parser_close(st->parser);
2542 av_free_packet(&st->cur_pkt);
2544 av_metadata_free(&st->metadata);
2545 av_free(st->index_entries);
2546 av_free(st->codec->extradata);
2547 av_free(st->codec->subtitle_header);
2549 av_free(st->priv_data);
2553 for(i=s->nb_programs-1; i>=0; i--) {
2554 av_metadata_free(&s->programs[i]->metadata);
2555 av_freep(&s->programs[i]->stream_index);
2556 av_freep(&s->programs[i]);
2558 av_freep(&s->programs);
2559 av_freep(&s->priv_data);
2560 while(s->nb_chapters--) {
2561 av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2562 av_free(s->chapters[s->nb_chapters]);
2564 av_freep(&s->chapters);
2565 av_metadata_free(&s->metadata);
2570 void av_close_input_file(AVFormatContext *s)
2572 AVIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2573 av_close_input_stream(s);
2578 AVStream *av_new_stream(AVFormatContext *s, int id)
2584 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2586 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2589 s->streams = streams;
2591 st = av_mallocz(sizeof(AVStream));
2594 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2599 st->codec= avcodec_alloc_context();
2601 /* no default bitrate if decoding */
2602 st->codec->bit_rate = 0;
2604 st->index = s->nb_streams;
2606 st->start_time = AV_NOPTS_VALUE;
2607 st->duration = AV_NOPTS_VALUE;
2608 /* we set the current DTS to 0 so that formats without any timestamps
2609 but durations get some timestamps, formats with some unknown
2610 timestamps have their first few packets buffered and the
2611 timestamps corrected before they are returned to the user */
2613 st->first_dts = AV_NOPTS_VALUE;
2614 st->probe_packets = MAX_PROBE_PACKETS;
2616 /* default pts setting is MPEG-like */
2617 av_set_pts_info(st, 33, 1, 90000);
2618 st->last_IP_pts = AV_NOPTS_VALUE;
2619 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2620 st->pts_buffer[i]= AV_NOPTS_VALUE;
2621 st->reference_dts = AV_NOPTS_VALUE;
2623 st->sample_aspect_ratio = (AVRational){0,1};
2625 s->streams[s->nb_streams++] = st;
2629 AVProgram *av_new_program(AVFormatContext *ac, int id)
2631 AVProgram *program=NULL;
2635 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2638 for(i=0; i<ac->nb_programs; i++)
2639 if(ac->programs[i]->id == id)
2640 program = ac->programs[i];
2643 program = av_mallocz(sizeof(AVProgram));
2646 dynarray_add(&ac->programs, &ac->nb_programs, program);
2647 program->discard = AVDISCARD_NONE;
2654 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2656 AVChapter *chapter = NULL;
2659 for(i=0; i<s->nb_chapters; i++)
2660 if(s->chapters[i]->id == id)
2661 chapter = s->chapters[i];
2664 chapter= av_mallocz(sizeof(AVChapter));
2667 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2669 av_metadata_set2(&chapter->metadata, "title", title, 0);
2671 chapter->time_base= time_base;
2672 chapter->start = start;
2678 /************************************************************/
2679 /* output media file */
2681 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2685 if (s->oformat->priv_data_size > 0) {
2686 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2688 return AVERROR(ENOMEM);
2689 if (s->oformat->priv_class) {
2690 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2691 av_opt_set_defaults(s->priv_data);
2694 s->priv_data = NULL;
2696 if (s->oformat->set_parameters) {
2697 ret = s->oformat->set_parameters(s, ap);
2704 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2706 const AVCodecTag *avctag;
2708 enum CodecID id = CODEC_ID_NONE;
2709 unsigned int tag = 0;
2712 * Check that tag + id is in the table
2713 * If neither is in the table -> OK
2714 * If tag is in the table with another id -> FAIL
2715 * If id is in the table with another tag -> FAIL unless strict < normal
2717 for (n = 0; s->oformat->codec_tag[n]; n++) {
2718 avctag = s->oformat->codec_tag[n];
2719 while (avctag->id != CODEC_ID_NONE) {
2720 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2722 if (id == st->codec->codec_id)
2725 if (avctag->id == st->codec->codec_id)
2730 if (id != CODEC_ID_NONE)
2732 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2737 int av_write_header(AVFormatContext *s)
2742 // some sanity checks
2743 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2744 av_log(s, AV_LOG_ERROR, "no streams\n");
2745 return AVERROR(EINVAL);
2748 for(i=0;i<s->nb_streams;i++) {
2751 switch (st->codec->codec_type) {
2752 case AVMEDIA_TYPE_AUDIO:
2753 if(st->codec->sample_rate<=0){
2754 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2755 return AVERROR(EINVAL);
2757 if(!st->codec->block_align)
2758 st->codec->block_align = st->codec->channels *
2759 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2761 case AVMEDIA_TYPE_VIDEO:
2762 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2763 av_log(s, AV_LOG_ERROR, "time base not set\n");
2764 return AVERROR(EINVAL);
2766 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2767 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2768 return AVERROR(EINVAL);
2770 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2771 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2772 return AVERROR(EINVAL);
2777 if(s->oformat->codec_tag){
2778 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)){
2779 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2780 st->codec->codec_tag= 0;
2782 if(st->codec->codec_tag){
2783 if (!validate_codec_tag(s, st)) {
2785 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2786 av_log(s, AV_LOG_ERROR,
2787 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2788 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2789 return AVERROR_INVALIDDATA;
2792 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2795 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2796 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2797 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2800 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2801 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2803 return AVERROR(ENOMEM);
2806 /* set muxer identification string */
2807 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2808 av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2811 if(s->oformat->write_header){
2812 ret = s->oformat->write_header(s);
2817 /* init PTS generation */
2818 for(i=0;i<s->nb_streams;i++) {
2819 int64_t den = AV_NOPTS_VALUE;
2822 switch (st->codec->codec_type) {
2823 case AVMEDIA_TYPE_AUDIO:
2824 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2826 case AVMEDIA_TYPE_VIDEO:
2827 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2832 if (den != AV_NOPTS_VALUE) {
2834 return AVERROR_INVALIDDATA;
2835 av_frac_init(&st->pts, 0, 0, den);
2841 //FIXME merge with compute_pkt_fields
2842 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2843 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2844 int num, den, frame_size, i;
2846 av_dlog(s, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2847 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2849 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2852 /* duration field */
2853 if (pkt->duration == 0) {
2854 compute_frame_duration(&num, &den, st, NULL, pkt);
2856 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2860 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2863 //XXX/FIXME this is a temporary hack until all encoders output pts
2864 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2866 // pkt->pts= st->cur_dts;
2867 pkt->pts= st->pts.val;
2870 //calculate dts from pts
2871 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2872 st->pts_buffer[0]= pkt->pts;
2873 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2874 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2875 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2876 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2878 pkt->dts= st->pts_buffer[0];
2881 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2882 av_log(s, AV_LOG_ERROR,
2883 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2884 st->index, st->cur_dts, pkt->dts);
2887 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2888 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2892 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2893 st->cur_dts= pkt->dts;
2894 st->pts.val= pkt->dts;
2897 switch (st->codec->codec_type) {
2898 case AVMEDIA_TYPE_AUDIO:
2899 frame_size = get_audio_frame_size(st->codec, pkt->size);
2901 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2902 likely equal to the encoder delay, but it would be better if we
2903 had the real timestamps from the encoder */
2904 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2905 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2908 case AVMEDIA_TYPE_VIDEO:
2909 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2917 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2919 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2921 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2924 ret= s->oformat->write_packet(s, pkt);
2928 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2929 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2931 AVPacketList **next_point, *this_pktl;
2933 this_pktl = av_mallocz(sizeof(AVPacketList));
2934 this_pktl->pkt= *pkt;
2935 pkt->destruct= NULL; // do not free original but only the copy
2936 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
2938 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
2939 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
2941 next_point = &s->packet_buffer;
2944 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
2945 while(!compare(s, &(*next_point)->pkt, pkt)){
2946 next_point= &(*next_point)->next;
2950 next_point = &(s->packet_buffer_end->next);
2953 assert(!*next_point);
2955 s->packet_buffer_end= this_pktl;
2958 this_pktl->next= *next_point;
2960 s->streams[pkt->stream_index]->last_in_packet_buffer=
2961 *next_point= this_pktl;
2964 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
2966 AVStream *st = s->streams[ pkt ->stream_index];
2967 AVStream *st2= s->streams[ next->stream_index];
2968 int64_t a= st2->time_base.num * (int64_t)st ->time_base.den;
2969 int64_t b= st ->time_base.num * (int64_t)st2->time_base.den;
2970 int64_t dts1 = av_rescale_rnd(pkt->dts, b, a, AV_ROUND_DOWN);
2971 if (dts1 == next->dts)
2972 return pkt->stream_index < next->stream_index;
2973 return dts1 < next->dts;
2976 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2982 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
2985 for(i=0; i < s->nb_streams; i++)
2986 stream_count+= !!s->streams[i]->last_in_packet_buffer;
2988 if(stream_count && (s->nb_streams == stream_count || flush)){
2989 pktl= s->packet_buffer;
2992 s->packet_buffer= pktl->next;
2993 if(!s->packet_buffer)
2994 s->packet_buffer_end= NULL;
2996 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
2997 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3001 av_init_packet(out);
3007 * Interleave an AVPacket correctly so it can be muxed.
3008 * @param out the interleaved packet will be output here
3009 * @param in the input packet
3010 * @param flush 1 if no further packets are available as input and all
3011 * remaining packets should be output
3012 * @return 1 if a packet was output, 0 if no packet could be output,
3013 * < 0 if an error occurred
3015 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3016 if(s->oformat->interleave_packet)
3017 return s->oformat->interleave_packet(s, out, in, flush);
3019 return av_interleave_packet_per_dts(s, out, in, flush);
3022 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3023 AVStream *st= s->streams[ pkt->stream_index];
3026 //FIXME/XXX/HACK drop zero sized packets
3027 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3030 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3031 pkt->size, pkt->dts, pkt->pts);
3032 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3035 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3036 return AVERROR(EINVAL);
3040 int ret= av_interleave_packet(s, &opkt, pkt, 0);
3041 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3044 ret= s->oformat->write_packet(s, &opkt);
3046 av_free_packet(&opkt);
3054 int av_write_trailer(AVFormatContext *s)
3060 ret= av_interleave_packet(s, &pkt, NULL, 1);
3061 if(ret<0) //FIXME cleanup needed for ret<0 ?
3066 ret= s->oformat->write_packet(s, &pkt);
3068 av_free_packet(&pkt);
3074 if(s->oformat->write_trailer)
3075 ret = s->oformat->write_trailer(s);
3077 for(i=0;i<s->nb_streams;i++) {
3078 av_freep(&s->streams[i]->priv_data);
3079 av_freep(&s->streams[i]->index_entries);
3081 av_freep(&s->priv_data);
3085 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3088 AVProgram *program=NULL;
3091 if (idx >= ac->nb_streams) {
3092 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3096 for(i=0; i<ac->nb_programs; i++){
3097 if(ac->programs[i]->id != progid)
3099 program = ac->programs[i];
3100 for(j=0; j<program->nb_stream_indexes; j++)
3101 if(program->stream_index[j] == idx)
3104 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3107 program->stream_index = tmp;
3108 program->stream_index[program->nb_stream_indexes++] = idx;
3113 static void print_fps(double d, const char *postfix){
3114 uint64_t v= lrintf(d*100);
3115 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3116 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3117 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3120 static void dump_metadata(void *ctx, AVMetadata *m, const char *indent)
3122 if(m && !(m->count == 1 && av_metadata_get(m, "language", NULL, 0))){
3123 AVMetadataTag *tag=NULL;
3125 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3126 while((tag=av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
3127 if(strcmp("language", tag->key))
3128 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3133 /* "user interface" functions */
3134 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3137 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3138 AVStream *st = ic->streams[i];
3139 int g = av_gcd(st->time_base.num, st->time_base.den);
3140 AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
3141 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3142 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3143 /* the pid is an important information, so we display it */
3144 /* XXX: add a generic system */
3145 if (flags & AVFMT_SHOW_IDS)
3146 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3148 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3149 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3150 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3151 if (st->sample_aspect_ratio.num && // default
3152 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3153 AVRational display_aspect_ratio;
3154 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3155 st->codec->width*st->sample_aspect_ratio.num,
3156 st->codec->height*st->sample_aspect_ratio.den,
3158 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3159 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3160 display_aspect_ratio.num, display_aspect_ratio.den);
3162 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3163 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3164 print_fps(av_q2d(st->avg_frame_rate), "fps");
3165 if(st->r_frame_rate.den && st->r_frame_rate.num)
3166 print_fps(av_q2d(st->r_frame_rate), "tbr");
3167 if(st->time_base.den && st->time_base.num)
3168 print_fps(1/av_q2d(st->time_base), "tbn");
3169 if(st->codec->time_base.den && st->codec->time_base.num)
3170 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3172 if (st->disposition & AV_DISPOSITION_DEFAULT)
3173 av_log(NULL, AV_LOG_INFO, " (default)");
3174 if (st->disposition & AV_DISPOSITION_DUB)
3175 av_log(NULL, AV_LOG_INFO, " (dub)");
3176 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3177 av_log(NULL, AV_LOG_INFO, " (original)");
3178 if (st->disposition & AV_DISPOSITION_COMMENT)
3179 av_log(NULL, AV_LOG_INFO, " (comment)");
3180 if (st->disposition & AV_DISPOSITION_LYRICS)
3181 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3182 if (st->disposition & AV_DISPOSITION_KARAOKE)
3183 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3184 if (st->disposition & AV_DISPOSITION_FORCED)
3185 av_log(NULL, AV_LOG_INFO, " (forced)");
3186 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3187 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3188 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3189 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3190 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3191 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3192 av_log(NULL, AV_LOG_INFO, "\n");
3193 dump_metadata(NULL, st->metadata, " ");
3196 #if FF_API_DUMP_FORMAT
3197 void dump_format(AVFormatContext *ic,
3202 av_dump_format(ic, index, url, is_output);
3206 void av_dump_format(AVFormatContext *ic,
3212 uint8_t *printed = av_mallocz(ic->nb_streams);
3213 if (ic->nb_streams && !printed)
3216 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3217 is_output ? "Output" : "Input",
3219 is_output ? ic->oformat->name : ic->iformat->name,
3220 is_output ? "to" : "from", url);
3221 dump_metadata(NULL, ic->metadata, " ");
3223 av_log(NULL, AV_LOG_INFO, " Duration: ");
3224 if (ic->duration != AV_NOPTS_VALUE) {
3225 int hours, mins, secs, us;
3226 secs = ic->duration / AV_TIME_BASE;
3227 us = ic->duration % AV_TIME_BASE;
3232 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3233 (100 * us) / AV_TIME_BASE);
3235 av_log(NULL, AV_LOG_INFO, "N/A");
3237 if (ic->start_time != AV_NOPTS_VALUE) {
3239 av_log(NULL, AV_LOG_INFO, ", start: ");
3240 secs = ic->start_time / AV_TIME_BASE;
3241 us = abs(ic->start_time % AV_TIME_BASE);
3242 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3243 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3245 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3247 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3249 av_log(NULL, AV_LOG_INFO, "N/A");
3251 av_log(NULL, AV_LOG_INFO, "\n");
3253 for (i = 0; i < ic->nb_chapters; i++) {
3254 AVChapter *ch = ic->chapters[i];
3255 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3256 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3257 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3259 dump_metadata(NULL, ch->metadata, " ");
3261 if(ic->nb_programs) {
3262 int j, k, total = 0;
3263 for(j=0; j<ic->nb_programs; j++) {
3264 AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata,
3266 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3267 name ? name->value : "");
3268 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3269 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3270 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3271 printed[ic->programs[j]->stream_index[k]] = 1;
3273 total += ic->programs[j]->nb_stream_indexes;
3275 if (total < ic->nb_streams)
3276 av_log(NULL, AV_LOG_INFO, " No Program\n");
3278 for(i=0;i<ic->nb_streams;i++)
3280 dump_stream_format(ic, i, index, is_output);
3285 int64_t av_gettime(void)
3288 gettimeofday(&tv,NULL);
3289 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3292 uint64_t ff_ntp_time(void)
3294 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3297 #if FF_API_PARSE_DATE
3298 #include "libavutil/parseutils.h"
3300 int64_t parse_date(const char *timestr, int duration)
3303 av_parse_time(&timeval, timestr, duration);
3308 #if FF_API_FIND_INFO_TAG
3309 #include "libavutil/parseutils.h"
3311 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3313 return av_find_info_tag(arg, arg_size, tag1, info);
3317 int av_get_frame_filename(char *buf, int buf_size,
3318 const char *path, int number)
3321 char *q, buf1[20], c;
3322 int nd, len, percentd_found;
3334 while (isdigit(*p)) {
3335 nd = nd * 10 + *p++ - '0';
3338 } while (isdigit(c));
3347 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3349 if ((q - buf + len) > buf_size - 1)
3351 memcpy(q, buf1, len);
3359 if ((q - buf) < buf_size - 1)
3363 if (!percentd_found)
3372 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3376 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3378 for(i=0;i<size;i+=16) {
3385 PRINT(" %02x", buf[i+j]);
3390 for(j=0;j<len;j++) {
3392 if (c < ' ' || c > '~')
3401 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3403 hex_dump_internal(NULL, f, 0, buf, size);
3406 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3408 hex_dump_internal(avcl, NULL, level, buf, size);
3411 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3414 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3415 PRINT("stream #%d:\n", pkt->stream_index);
3416 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3417 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3418 /* DTS is _always_ valid after av_read_frame() */
3420 if (pkt->dts == AV_NOPTS_VALUE)
3423 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3424 /* PTS may not be known if B-frames are present. */
3426 if (pkt->pts == AV_NOPTS_VALUE)
3429 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3431 PRINT(" size=%d\n", pkt->size);
3434 av_hex_dump(f, pkt->data, pkt->size);
3438 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3440 AVRational tb = { 1, AV_TIME_BASE };
3441 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3445 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3447 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3451 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3453 AVRational tb = { 1, AV_TIME_BASE };
3454 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3458 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3461 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3464 void av_url_split(char *proto, int proto_size,
3465 char *authorization, int authorization_size,
3466 char *hostname, int hostname_size,
3468 char *path, int path_size,
3471 const char *p, *ls, *at, *col, *brk;
3473 if (port_ptr) *port_ptr = -1;
3474 if (proto_size > 0) proto[0] = 0;
3475 if (authorization_size > 0) authorization[0] = 0;
3476 if (hostname_size > 0) hostname[0] = 0;
3477 if (path_size > 0) path[0] = 0;
3479 /* parse protocol */
3480 if ((p = strchr(url, ':'))) {
3481 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3486 /* no protocol means plain filename */
3487 av_strlcpy(path, url, path_size);
3491 /* separate path from hostname */
3492 ls = strchr(p, '/');
3494 ls = strchr(p, '?');
3496 av_strlcpy(path, ls, path_size);
3498 ls = &p[strlen(p)]; // XXX
3500 /* the rest is hostname, use that to parse auth/port */
3502 /* authorization (user[:pass]@hostname) */
3503 if ((at = strchr(p, '@')) && at < ls) {
3504 av_strlcpy(authorization, p,
3505 FFMIN(authorization_size, at + 1 - p));
3506 p = at + 1; /* skip '@' */
3509 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3511 av_strlcpy(hostname, p + 1,
3512 FFMIN(hostname_size, brk - p));
3513 if (brk[1] == ':' && port_ptr)
3514 *port_ptr = atoi(brk + 2);
3515 } else if ((col = strchr(p, ':')) && col < ls) {
3516 av_strlcpy(hostname, p,
3517 FFMIN(col + 1 - p, hostname_size));
3518 if (port_ptr) *port_ptr = atoi(col + 1);
3520 av_strlcpy(hostname, p,
3521 FFMIN(ls + 1 - p, hostname_size));
3525 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3528 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3531 'C', 'D', 'E', 'F' };
3532 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3535 'c', 'd', 'e', 'f' };
3536 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3538 for(i = 0; i < s; i++) {
3539 buff[i * 2] = hex_table[src[i] >> 4];
3540 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3546 int ff_hex_to_data(uint8_t *data, const char *p)
3553 p += strspn(p, SPACE_CHARS);
3556 c = toupper((unsigned char) *p++);
3557 if (c >= '0' && c <= '9')
3559 else if (c >= 'A' && c <= 'F')
3574 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3575 unsigned int pts_num, unsigned int pts_den)
3578 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3579 if(new_tb.num != pts_num)
3580 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3582 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3584 if(new_tb.num <= 0 || new_tb.den <= 0) {
3585 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3588 s->time_base = new_tb;
3589 s->pts_wrap_bits = pts_wrap_bits;
3592 int ff_url_join(char *str, int size, const char *proto,
3593 const char *authorization, const char *hostname,
3594 int port, const char *fmt, ...)
3597 struct addrinfo hints, *ai;
3602 av_strlcatf(str, size, "%s://", proto);
3603 if (authorization && authorization[0])
3604 av_strlcatf(str, size, "%s@", authorization);
3605 #if CONFIG_NETWORK && defined(AF_INET6)
3606 /* Determine if hostname is a numerical IPv6 address,
3607 * properly escape it within [] in that case. */
3608 memset(&hints, 0, sizeof(hints));
3609 hints.ai_flags = AI_NUMERICHOST;
3610 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3611 if (ai->ai_family == AF_INET6) {
3612 av_strlcat(str, "[", size);
3613 av_strlcat(str, hostname, size);
3614 av_strlcat(str, "]", size);
3616 av_strlcat(str, hostname, size);
3621 /* Not an IPv6 address, just output the plain string. */
3622 av_strlcat(str, hostname, size);
3625 av_strlcatf(str, size, ":%d", port);
3628 int len = strlen(str);
3631 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3637 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3638 AVFormatContext *src)
3643 local_pkt.stream_index = dst_stream;
3644 if (pkt->pts != AV_NOPTS_VALUE)
3645 local_pkt.pts = av_rescale_q(pkt->pts,
3646 src->streams[pkt->stream_index]->time_base,
3647 dst->streams[dst_stream]->time_base);
3648 if (pkt->dts != AV_NOPTS_VALUE)
3649 local_pkt.dts = av_rescale_q(pkt->dts,
3650 src->streams[pkt->stream_index]->time_base,
3651 dst->streams[dst_stream]->time_base);
3652 return av_write_frame(dst, &local_pkt);
3655 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3658 const char *ptr = str;
3660 /* Parse key=value pairs. */
3663 char *dest = NULL, *dest_end;
3664 int key_len, dest_len = 0;
3666 /* Skip whitespace and potential commas. */
3667 while (*ptr && (isspace(*ptr) || *ptr == ','))
3674 if (!(ptr = strchr(key, '=')))
3677 key_len = ptr - key;
3679 callback_get_buf(context, key, key_len, &dest, &dest_len);
3680 dest_end = dest + dest_len - 1;
3684 while (*ptr && *ptr != '\"') {
3688 if (dest && dest < dest_end)
3692 if (dest && dest < dest_end)
3700 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3701 if (dest && dest < dest_end)
3709 int ff_find_stream_index(AVFormatContext *s, int id)
3712 for (i = 0; i < s->nb_streams; i++) {
3713 if (s->streams[i]->id == id)
3719 void ff_make_absolute_url(char *buf, int size, const char *base,
3723 /* Absolute path, relative to the current server */
3724 if (base && strstr(base, "://") && rel[0] == '/') {
3726 av_strlcpy(buf, base, size);
3727 sep = strstr(buf, "://");
3730 sep = strchr(sep, '/');
3734 av_strlcat(buf, rel, size);
3737 /* If rel actually is an absolute url, just copy it */
3738 if (!base || strstr(rel, "://") || rel[0] == '/') {
3739 av_strlcpy(buf, rel, size);
3743 av_strlcpy(buf, base, size);
3744 /* Remove the file name from the base url */
3745 sep = strrchr(buf, '/');
3750 while (av_strstart(rel, "../", NULL) && sep) {
3751 /* Remove the path delimiter at the end */
3753 sep = strrchr(buf, '/');
3754 /* If the next directory name to pop off is "..", break here */
3755 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3756 /* Readd the slash we just removed */
3757 av_strlcat(buf, "/", size);
3760 /* Cut off the directory name */
3767 av_strlcat(buf, rel, size);