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(EINVAL);
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 == AV_PICTURE_TYPE_B)
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 != AV_PICTURE_TYPE_B)
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 == AV_PICTURE_TYPE_I)
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);
1980 for(i = 0;i < ic->nb_streams; i++) {
1981 st = ic->streams[i];
1982 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
1983 (double) st->start_time / AV_TIME_BASE,
1984 (double) st->duration / AV_TIME_BASE);
1986 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1987 (double) ic->start_time / AV_TIME_BASE,
1988 (double) ic->duration / AV_TIME_BASE,
1989 ic->bit_rate / 1000);
1993 static int has_codec_parameters(AVCodecContext *enc)
1996 switch(enc->codec_type) {
1997 case AVMEDIA_TYPE_AUDIO:
1998 val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
1999 if(!enc->frame_size &&
2000 (enc->codec_id == CODEC_ID_VORBIS ||
2001 enc->codec_id == CODEC_ID_AAC ||
2002 enc->codec_id == CODEC_ID_MP1 ||
2003 enc->codec_id == CODEC_ID_MP2 ||
2004 enc->codec_id == CODEC_ID_MP3 ||
2005 enc->codec_id == CODEC_ID_SPEEX))
2008 case AVMEDIA_TYPE_VIDEO:
2009 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2015 return enc->codec_id != CODEC_ID_NONE && val != 0;
2018 static int has_decode_delay_been_guessed(AVStream *st)
2020 return st->codec->codec_id != CODEC_ID_H264 ||
2021 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2024 static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2028 int got_picture, data_size, ret=0;
2031 if(!st->codec->codec){
2032 codec = avcodec_find_decoder(st->codec->codec_id);
2035 ret = avcodec_open(st->codec, codec);
2040 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2041 switch(st->codec->codec_type) {
2042 case AVMEDIA_TYPE_VIDEO:
2043 avcodec_get_frame_defaults(&picture);
2044 ret = avcodec_decode_video2(st->codec, &picture,
2045 &got_picture, avpkt);
2047 case AVMEDIA_TYPE_AUDIO:
2048 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2049 samples = av_malloc(data_size);
2052 ret = avcodec_decode_audio3(st->codec, samples,
2064 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2066 while (tags->id != CODEC_ID_NONE) {
2074 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2077 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2078 if(tag == tags[i].tag)
2081 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2082 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2085 return CODEC_ID_NONE;
2088 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2091 for(i=0; tags && tags[i]; i++){
2092 int tag= ff_codec_get_tag(tags[i], id);
2098 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2101 for(i=0; tags && tags[i]; i++){
2102 enum CodecID id= ff_codec_get_id(tags[i], tag);
2103 if(id!=CODEC_ID_NONE) return id;
2105 return CODEC_ID_NONE;
2108 static void compute_chapters_end(AVFormatContext *s)
2111 int64_t max_time = s->duration + (s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time;
2113 for (i = 0; i < s->nb_chapters; i++)
2114 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2115 AVChapter *ch = s->chapters[i];
2116 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2119 for (j = 0; j < s->nb_chapters; j++) {
2120 AVChapter *ch1 = s->chapters[j];
2121 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2122 if (j != i && next_start > ch->start && next_start < end)
2125 ch->end = (end == INT64_MAX) ? ch->start : end;
2129 static int get_std_framerate(int i){
2130 if(i<60*12) return i*1001;
2131 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2135 * Is the time base unreliable.
2136 * This is a heuristic to balance between quick acceptance of the values in
2137 * the headers vs. some extra checks.
2138 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2139 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2140 * And there are "variable" fps files this needs to detect as well.
2142 static int tb_unreliable(AVCodecContext *c){
2143 if( c->time_base.den >= 101L*c->time_base.num
2144 || c->time_base.den < 5L*c->time_base.num
2145 /* || c->codec_tag == AV_RL32("DIVX")
2146 || c->codec_tag == AV_RL32("XVID")*/
2147 || c->codec_id == CODEC_ID_MPEG2VIDEO
2148 || c->codec_id == CODEC_ID_H264
2154 int av_find_stream_info(AVFormatContext *ic)
2156 int i, count, ret, read_size, j;
2158 AVPacket pkt1, *pkt;
2159 int64_t old_offset = avio_tell(ic->pb);
2161 for(i=0;i<ic->nb_streams;i++) {
2163 st = ic->streams[i];
2164 if (st->codec->codec_id == CODEC_ID_AAC) {
2165 st->codec->sample_rate = 0;
2166 st->codec->frame_size = 0;
2167 st->codec->channels = 0;
2169 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2170 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2171 /* if(!st->time_base.num)
2173 if(!st->codec->time_base.num)
2174 st->codec->time_base= st->time_base;
2176 //only for the split stuff
2177 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2178 st->parser = av_parser_init(st->codec->codec_id);
2179 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2180 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2183 assert(!st->codec->codec);
2184 codec = avcodec_find_decoder(st->codec->codec_id);
2186 /* Force decoding of at least one frame of codec data
2187 * this makes sure the codec initializes the channel configuration
2188 * and does not trust the values from the container.
2190 if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF)
2191 st->codec->channels = 0;
2193 /* Ensure that subtitle_header is properly set. */
2194 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2195 && codec && !st->codec->codec)
2196 avcodec_open(st->codec, codec);
2198 //try to just open decoders, in case this is enough to get parameters
2199 if(!has_codec_parameters(st->codec)){
2200 if (codec && !st->codec->codec)
2201 avcodec_open(st->codec, codec);
2205 for (i=0; i<ic->nb_streams; i++) {
2206 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2212 if(url_interrupt_cb()){
2214 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2218 /* check if one codec still needs to be handled */
2219 for(i=0;i<ic->nb_streams;i++) {
2220 int fps_analyze_framecount = 20;
2222 st = ic->streams[i];
2223 if (!has_codec_parameters(st->codec))
2225 /* if the timebase is coarse (like the usual millisecond precision
2226 of mkv), we need to analyze more frames to reliably arrive at
2228 if (av_q2d(st->time_base) > 0.0005)
2229 fps_analyze_framecount *= 2;
2230 /* variable fps and no guess at the real fps */
2231 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2232 && st->info->duration_count < fps_analyze_framecount
2233 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2235 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2237 if(st->first_dts == AV_NOPTS_VALUE)
2240 if (i == ic->nb_streams) {
2241 /* NOTE: if the format has no header, then we need to read
2242 some packets to get most of the streams, so we cannot
2244 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2245 /* if we found the info for all the codecs, we can stop */
2247 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2251 /* we did not get all the codec info, but we read too much data */
2252 if (read_size >= ic->probesize) {
2254 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2258 /* NOTE: a new stream can be added there if no header in file
2259 (AVFMTCTX_NOHEADER) */
2260 ret = av_read_frame_internal(ic, &pkt1);
2261 if (ret < 0 && ret != AVERROR(EAGAIN)) {
2263 ret = -1; /* we could not have all the codec parameters before EOF */
2264 for(i=0;i<ic->nb_streams;i++) {
2265 st = ic->streams[i];
2266 if (!has_codec_parameters(st->codec)){
2268 avcodec_string(buf, sizeof(buf), st->codec, 0);
2269 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2277 if (ret == AVERROR(EAGAIN))
2280 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2281 if ((ret = av_dup_packet(pkt)) < 0)
2282 goto find_stream_info_err;
2284 read_size += pkt->size;
2286 st = ic->streams[pkt->stream_index];
2287 if (st->codec_info_nb_frames>1) {
2288 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) {
2289 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2292 st->info->codec_info_duration += pkt->duration;
2295 int64_t last = st->info->last_dts;
2296 int64_t duration= pkt->dts - last;
2298 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2299 double dur= duration * av_q2d(st->time_base);
2301 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2302 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2303 if (st->info->duration_count < 2)
2304 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2305 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2306 int framerate= get_std_framerate(i);
2307 int ticks= lrintf(dur*framerate/(1001*12));
2308 double error= dur - ticks*1001*12/(double)framerate;
2309 st->info->duration_error[i] += error*error;
2311 st->info->duration_count++;
2312 // ignore the first 4 values, they might have some random jitter
2313 if (st->info->duration_count > 3)
2314 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2316 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2317 st->info->last_dts = pkt->dts;
2319 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2320 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2322 st->codec->extradata_size= i;
2323 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2324 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2325 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2329 /* if still no information, we try to open the codec and to
2330 decompress the frame. We try to avoid that in most cases as
2331 it takes longer and uses more memory. For MPEG-4, we need to
2332 decompress for QuickTime. */
2333 if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st))
2334 try_decode_frame(st, pkt);
2336 st->codec_info_nb_frames++;
2340 // close codecs which were opened in try_decode_frame()
2341 for(i=0;i<ic->nb_streams;i++) {
2342 st = ic->streams[i];
2343 if(st->codec->codec)
2344 avcodec_close(st->codec);
2346 for(i=0;i<ic->nb_streams;i++) {
2347 st = ic->streams[i];
2348 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2349 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2350 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2351 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2352 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2353 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample)
2354 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2356 // the check for tb_unreliable() is not completely correct, since this is not about handling
2357 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2358 // ipmovie.c produces.
2359 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2360 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);
2361 if (st->info->duration_count && !st->r_frame_rate.num
2362 && tb_unreliable(st->codec) /*&&
2363 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2364 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2366 double best_error= 2*av_q2d(st->time_base);
2367 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2369 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2370 double error = st->info->duration_error[j] * get_std_framerate(j);
2371 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2372 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2373 if(error < best_error){
2375 num = get_std_framerate(j);
2378 // do not increase frame rate by more than 1 % in order to match a standard rate.
2379 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2380 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2383 if (!st->r_frame_rate.num){
2384 if( st->codec->time_base.den * (int64_t)st->time_base.num
2385 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2386 st->r_frame_rate.num = st->codec->time_base.den;
2387 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2389 st->r_frame_rate.num = st->time_base.den;
2390 st->r_frame_rate.den = st->time_base.num;
2393 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2394 if(!st->codec->bits_per_coded_sample)
2395 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2396 // set stream disposition based on audio service type
2397 switch (st->codec->audio_service_type) {
2398 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2399 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2400 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2401 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2402 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2403 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2404 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2405 st->disposition = AV_DISPOSITION_COMMENT; break;
2406 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2407 st->disposition = AV_DISPOSITION_KARAOKE; break;
2412 av_estimate_timings(ic, old_offset);
2414 compute_chapters_end(ic);
2417 /* correct DTS for B-frame streams with no timestamps */
2418 for(i=0;i<ic->nb_streams;i++) {
2419 st = ic->streams[i];
2420 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2422 ppktl = &ic->packet_buffer;
2424 if(ppkt1->stream_index != i)
2426 if(ppkt1->pkt->dts < 0)
2428 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2430 ppkt1->pkt->dts -= delta;
2435 st->cur_dts -= delta;
2441 find_stream_info_err:
2442 for (i=0; i < ic->nb_streams; i++)
2443 av_freep(&ic->streams[i]->info);
2447 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2451 for (i = 0; i < ic->nb_programs; i++)
2452 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2453 if (ic->programs[i]->stream_index[j] == s)
2454 return ic->programs[i];
2458 int av_find_best_stream(AVFormatContext *ic,
2459 enum AVMediaType type,
2460 int wanted_stream_nb,
2462 AVCodec **decoder_ret,
2465 int i, nb_streams = ic->nb_streams, stream_number = 0;
2466 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2467 unsigned *program = NULL;
2468 AVCodec *decoder = NULL, *best_decoder = NULL;
2470 if (related_stream >= 0 && wanted_stream_nb < 0) {
2471 AVProgram *p = find_program_from_stream(ic, related_stream);
2473 program = p->stream_index;
2474 nb_streams = p->nb_stream_indexes;
2477 for (i = 0; i < nb_streams; i++) {
2478 AVStream *st = ic->streams[program ? program[i] : i];
2479 AVCodecContext *avctx = st->codec;
2480 if (avctx->codec_type != type)
2482 if (wanted_stream_nb >= 0 && stream_number++ != wanted_stream_nb)
2484 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2487 decoder = avcodec_find_decoder(ic->streams[i]->codec->codec_id);
2490 ret = AVERROR_DECODER_NOT_FOUND;
2494 if (best_count >= st->codec_info_nb_frames)
2496 best_count = st->codec_info_nb_frames;
2497 ret = program ? program[i] : i;
2498 best_decoder = decoder;
2499 if (program && i == nb_streams - 1 && ret < 0) {
2501 nb_streams = ic->nb_streams;
2502 i = 0; /* no related stream found, try again with everything */
2506 *decoder_ret = best_decoder;
2510 /*******************************************************/
2512 int av_read_play(AVFormatContext *s)
2514 if (s->iformat->read_play)
2515 return s->iformat->read_play(s);
2517 return avio_pause(s->pb, 0);
2518 return AVERROR(ENOSYS);
2521 int av_read_pause(AVFormatContext *s)
2523 if (s->iformat->read_pause)
2524 return s->iformat->read_pause(s);
2526 return avio_pause(s->pb, 1);
2527 return AVERROR(ENOSYS);
2530 void av_close_input_stream(AVFormatContext *s)
2532 flush_packet_queue(s);
2533 if (s->iformat->read_close)
2534 s->iformat->read_close(s);
2535 avformat_free_context(s);
2538 void avformat_free_context(AVFormatContext *s)
2543 for(i=0;i<s->nb_streams;i++) {
2544 /* free all data in a stream component */
2547 av_parser_close(st->parser);
2548 av_free_packet(&st->cur_pkt);
2550 av_metadata_free(&st->metadata);
2551 av_free(st->index_entries);
2552 av_free(st->codec->extradata);
2553 av_free(st->codec->subtitle_header);
2555 av_free(st->priv_data);
2559 for(i=s->nb_programs-1; i>=0; i--) {
2560 av_metadata_free(&s->programs[i]->metadata);
2561 av_freep(&s->programs[i]->stream_index);
2562 av_freep(&s->programs[i]);
2564 av_freep(&s->programs);
2565 av_freep(&s->priv_data);
2566 while(s->nb_chapters--) {
2567 av_metadata_free(&s->chapters[s->nb_chapters]->metadata);
2568 av_free(s->chapters[s->nb_chapters]);
2570 av_freep(&s->chapters);
2571 av_metadata_free(&s->metadata);
2573 av_freep(&s->streams);
2577 void av_close_input_file(AVFormatContext *s)
2579 AVIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2580 av_close_input_stream(s);
2585 AVStream *av_new_stream(AVFormatContext *s, int id)
2591 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2593 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2596 s->streams = streams;
2598 st = av_mallocz(sizeof(AVStream));
2601 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2606 st->codec= avcodec_alloc_context();
2608 /* no default bitrate if decoding */
2609 st->codec->bit_rate = 0;
2611 st->index = s->nb_streams;
2613 st->start_time = AV_NOPTS_VALUE;
2614 st->duration = AV_NOPTS_VALUE;
2615 /* we set the current DTS to 0 so that formats without any timestamps
2616 but durations get some timestamps, formats with some unknown
2617 timestamps have their first few packets buffered and the
2618 timestamps corrected before they are returned to the user */
2620 st->first_dts = AV_NOPTS_VALUE;
2621 st->probe_packets = MAX_PROBE_PACKETS;
2623 /* default pts setting is MPEG-like */
2624 av_set_pts_info(st, 33, 1, 90000);
2625 st->last_IP_pts = AV_NOPTS_VALUE;
2626 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2627 st->pts_buffer[i]= AV_NOPTS_VALUE;
2628 st->reference_dts = AV_NOPTS_VALUE;
2630 st->sample_aspect_ratio = (AVRational){0,1};
2632 s->streams[s->nb_streams++] = st;
2636 AVProgram *av_new_program(AVFormatContext *ac, int id)
2638 AVProgram *program=NULL;
2642 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2645 for(i=0; i<ac->nb_programs; i++)
2646 if(ac->programs[i]->id == id)
2647 program = ac->programs[i];
2650 program = av_mallocz(sizeof(AVProgram));
2653 dynarray_add(&ac->programs, &ac->nb_programs, program);
2654 program->discard = AVDISCARD_NONE;
2661 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2663 AVChapter *chapter = NULL;
2666 for(i=0; i<s->nb_chapters; i++)
2667 if(s->chapters[i]->id == id)
2668 chapter = s->chapters[i];
2671 chapter= av_mallocz(sizeof(AVChapter));
2674 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2676 av_metadata_set2(&chapter->metadata, "title", title, 0);
2678 chapter->time_base= time_base;
2679 chapter->start = start;
2685 /************************************************************/
2686 /* output media file */
2688 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2692 if (s->oformat->priv_data_size > 0) {
2693 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2695 return AVERROR(ENOMEM);
2696 if (s->oformat->priv_class) {
2697 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2698 av_opt_set_defaults(s->priv_data);
2701 s->priv_data = NULL;
2703 if (s->oformat->set_parameters) {
2704 ret = s->oformat->set_parameters(s, ap);
2711 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2713 const AVCodecTag *avctag;
2715 enum CodecID id = CODEC_ID_NONE;
2716 unsigned int tag = 0;
2719 * Check that tag + id is in the table
2720 * If neither is in the table -> OK
2721 * If tag is in the table with another id -> FAIL
2722 * If id is in the table with another tag -> FAIL unless strict < normal
2724 for (n = 0; s->oformat->codec_tag[n]; n++) {
2725 avctag = s->oformat->codec_tag[n];
2726 while (avctag->id != CODEC_ID_NONE) {
2727 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2729 if (id == st->codec->codec_id)
2732 if (avctag->id == st->codec->codec_id)
2737 if (id != CODEC_ID_NONE)
2739 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2744 int av_write_header(AVFormatContext *s)
2749 // some sanity checks
2750 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2751 av_log(s, AV_LOG_ERROR, "no streams\n");
2752 return AVERROR(EINVAL);
2755 for(i=0;i<s->nb_streams;i++) {
2758 switch (st->codec->codec_type) {
2759 case AVMEDIA_TYPE_AUDIO:
2760 if(st->codec->sample_rate<=0){
2761 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2762 return AVERROR(EINVAL);
2764 if(!st->codec->block_align)
2765 st->codec->block_align = st->codec->channels *
2766 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2768 case AVMEDIA_TYPE_VIDEO:
2769 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2770 av_log(s, AV_LOG_ERROR, "time base not set\n");
2771 return AVERROR(EINVAL);
2773 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2774 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2775 return AVERROR(EINVAL);
2777 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2778 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2779 return AVERROR(EINVAL);
2784 if(s->oformat->codec_tag){
2785 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)){
2786 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2787 st->codec->codec_tag= 0;
2789 if(st->codec->codec_tag){
2790 if (!validate_codec_tag(s, st)) {
2792 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2793 av_log(s, AV_LOG_ERROR,
2794 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2795 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2796 return AVERROR_INVALIDDATA;
2799 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2802 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2803 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2804 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2807 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2808 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2810 return AVERROR(ENOMEM);
2813 /* set muxer identification string */
2814 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2815 av_metadata_set2(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2818 if(s->oformat->write_header){
2819 ret = s->oformat->write_header(s);
2824 /* init PTS generation */
2825 for(i=0;i<s->nb_streams;i++) {
2826 int64_t den = AV_NOPTS_VALUE;
2829 switch (st->codec->codec_type) {
2830 case AVMEDIA_TYPE_AUDIO:
2831 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2833 case AVMEDIA_TYPE_VIDEO:
2834 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2839 if (den != AV_NOPTS_VALUE) {
2841 return AVERROR_INVALIDDATA;
2842 av_frac_init(&st->pts, 0, 0, den);
2848 //FIXME merge with compute_pkt_fields
2849 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2850 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2851 int num, den, frame_size, i;
2853 av_dlog(s, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2854 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2856 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2859 /* duration field */
2860 if (pkt->duration == 0) {
2861 compute_frame_duration(&num, &den, st, NULL, pkt);
2863 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2867 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2870 //XXX/FIXME this is a temporary hack until all encoders output pts
2871 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2873 // pkt->pts= st->cur_dts;
2874 pkt->pts= st->pts.val;
2877 //calculate dts from pts
2878 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2879 st->pts_buffer[0]= pkt->pts;
2880 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2881 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2882 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2883 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2885 pkt->dts= st->pts_buffer[0];
2888 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2889 av_log(s, AV_LOG_ERROR,
2890 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2891 st->index, st->cur_dts, pkt->dts);
2894 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2895 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
2899 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2900 st->cur_dts= pkt->dts;
2901 st->pts.val= pkt->dts;
2904 switch (st->codec->codec_type) {
2905 case AVMEDIA_TYPE_AUDIO:
2906 frame_size = get_audio_frame_size(st->codec, pkt->size);
2908 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2909 likely equal to the encoder delay, but it would be better if we
2910 had the real timestamps from the encoder */
2911 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2912 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2915 case AVMEDIA_TYPE_VIDEO:
2916 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2924 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2926 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
2928 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2931 ret= s->oformat->write_packet(s, pkt);
2935 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
2936 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
2938 AVPacketList **next_point, *this_pktl;
2940 this_pktl = av_mallocz(sizeof(AVPacketList));
2941 this_pktl->pkt= *pkt;
2942 pkt->destruct= NULL; // do not free original but only the copy
2943 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
2945 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
2946 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
2948 next_point = &s->packet_buffer;
2951 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
2952 while(!compare(s, &(*next_point)->pkt, pkt)){
2953 next_point= &(*next_point)->next;
2957 next_point = &(s->packet_buffer_end->next);
2960 assert(!*next_point);
2962 s->packet_buffer_end= this_pktl;
2965 this_pktl->next= *next_point;
2967 s->streams[pkt->stream_index]->last_in_packet_buffer=
2968 *next_point= this_pktl;
2971 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
2973 AVStream *st = s->streams[ pkt ->stream_index];
2974 AVStream *st2= s->streams[ next->stream_index];
2975 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
2979 return pkt->stream_index < next->stream_index;
2983 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2989 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
2992 for(i=0; i < s->nb_streams; i++)
2993 stream_count+= !!s->streams[i]->last_in_packet_buffer;
2995 if(stream_count && (s->nb_streams == stream_count || flush)){
2996 pktl= s->packet_buffer;
2999 s->packet_buffer= pktl->next;
3000 if(!s->packet_buffer)
3001 s->packet_buffer_end= NULL;
3003 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3004 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3008 av_init_packet(out);
3014 * Interleave an AVPacket correctly so it can be muxed.
3015 * @param out the interleaved packet will be output here
3016 * @param in the input packet
3017 * @param flush 1 if no further packets are available as input and all
3018 * remaining packets should be output
3019 * @return 1 if a packet was output, 0 if no packet could be output,
3020 * < 0 if an error occurred
3022 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3023 if(s->oformat->interleave_packet)
3024 return s->oformat->interleave_packet(s, out, in, flush);
3026 return av_interleave_packet_per_dts(s, out, in, flush);
3029 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3030 AVStream *st= s->streams[ pkt->stream_index];
3033 //FIXME/XXX/HACK drop zero sized packets
3034 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3037 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3038 pkt->size, pkt->dts, pkt->pts);
3039 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3042 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3043 return AVERROR(EINVAL);
3047 int ret= av_interleave_packet(s, &opkt, pkt, 0);
3048 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3051 ret= s->oformat->write_packet(s, &opkt);
3053 av_free_packet(&opkt);
3061 int av_write_trailer(AVFormatContext *s)
3067 ret= av_interleave_packet(s, &pkt, NULL, 1);
3068 if(ret<0) //FIXME cleanup needed for ret<0 ?
3073 ret= s->oformat->write_packet(s, &pkt);
3075 av_free_packet(&pkt);
3081 if(s->oformat->write_trailer)
3082 ret = s->oformat->write_trailer(s);
3084 for(i=0;i<s->nb_streams;i++) {
3085 av_freep(&s->streams[i]->priv_data);
3086 av_freep(&s->streams[i]->index_entries);
3088 av_freep(&s->priv_data);
3092 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3095 AVProgram *program=NULL;
3098 if (idx >= ac->nb_streams) {
3099 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3103 for(i=0; i<ac->nb_programs; i++){
3104 if(ac->programs[i]->id != progid)
3106 program = ac->programs[i];
3107 for(j=0; j<program->nb_stream_indexes; j++)
3108 if(program->stream_index[j] == idx)
3111 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3114 program->stream_index = tmp;
3115 program->stream_index[program->nb_stream_indexes++] = idx;
3120 static void print_fps(double d, const char *postfix){
3121 uint64_t v= lrintf(d*100);
3122 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3123 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3124 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3127 static void dump_metadata(void *ctx, AVMetadata *m, const char *indent)
3129 if(m && !(m->count == 1 && av_metadata_get(m, "language", NULL, 0))){
3130 AVMetadataTag *tag=NULL;
3132 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3133 while((tag=av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
3134 if(strcmp("language", tag->key))
3135 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3140 /* "user interface" functions */
3141 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3144 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3145 AVStream *st = ic->streams[i];
3146 int g = av_gcd(st->time_base.num, st->time_base.den);
3147 AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL, 0);
3148 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3149 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3150 /* the pid is an important information, so we display it */
3151 /* XXX: add a generic system */
3152 if (flags & AVFMT_SHOW_IDS)
3153 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3155 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3156 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3157 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3158 if (st->sample_aspect_ratio.num && // default
3159 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3160 AVRational display_aspect_ratio;
3161 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3162 st->codec->width*st->sample_aspect_ratio.num,
3163 st->codec->height*st->sample_aspect_ratio.den,
3165 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3166 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3167 display_aspect_ratio.num, display_aspect_ratio.den);
3169 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3170 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3171 print_fps(av_q2d(st->avg_frame_rate), "fps");
3172 if(st->r_frame_rate.den && st->r_frame_rate.num)
3173 print_fps(av_q2d(st->r_frame_rate), "tbr");
3174 if(st->time_base.den && st->time_base.num)
3175 print_fps(1/av_q2d(st->time_base), "tbn");
3176 if(st->codec->time_base.den && st->codec->time_base.num)
3177 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3179 if (st->disposition & AV_DISPOSITION_DEFAULT)
3180 av_log(NULL, AV_LOG_INFO, " (default)");
3181 if (st->disposition & AV_DISPOSITION_DUB)
3182 av_log(NULL, AV_LOG_INFO, " (dub)");
3183 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3184 av_log(NULL, AV_LOG_INFO, " (original)");
3185 if (st->disposition & AV_DISPOSITION_COMMENT)
3186 av_log(NULL, AV_LOG_INFO, " (comment)");
3187 if (st->disposition & AV_DISPOSITION_LYRICS)
3188 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3189 if (st->disposition & AV_DISPOSITION_KARAOKE)
3190 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3191 if (st->disposition & AV_DISPOSITION_FORCED)
3192 av_log(NULL, AV_LOG_INFO, " (forced)");
3193 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3194 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3195 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3196 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3197 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3198 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3199 av_log(NULL, AV_LOG_INFO, "\n");
3200 dump_metadata(NULL, st->metadata, " ");
3203 #if FF_API_DUMP_FORMAT
3204 void dump_format(AVFormatContext *ic,
3209 av_dump_format(ic, index, url, is_output);
3213 void av_dump_format(AVFormatContext *ic,
3219 uint8_t *printed = av_mallocz(ic->nb_streams);
3220 if (ic->nb_streams && !printed)
3223 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3224 is_output ? "Output" : "Input",
3226 is_output ? ic->oformat->name : ic->iformat->name,
3227 is_output ? "to" : "from", url);
3228 dump_metadata(NULL, ic->metadata, " ");
3230 av_log(NULL, AV_LOG_INFO, " Duration: ");
3231 if (ic->duration != AV_NOPTS_VALUE) {
3232 int hours, mins, secs, us;
3233 secs = ic->duration / AV_TIME_BASE;
3234 us = ic->duration % AV_TIME_BASE;
3239 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3240 (100 * us) / AV_TIME_BASE);
3242 av_log(NULL, AV_LOG_INFO, "N/A");
3244 if (ic->start_time != AV_NOPTS_VALUE) {
3246 av_log(NULL, AV_LOG_INFO, ", start: ");
3247 secs = ic->start_time / AV_TIME_BASE;
3248 us = abs(ic->start_time % AV_TIME_BASE);
3249 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3250 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3252 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3254 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3256 av_log(NULL, AV_LOG_INFO, "N/A");
3258 av_log(NULL, AV_LOG_INFO, "\n");
3260 for (i = 0; i < ic->nb_chapters; i++) {
3261 AVChapter *ch = ic->chapters[i];
3262 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3263 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3264 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3266 dump_metadata(NULL, ch->metadata, " ");
3268 if(ic->nb_programs) {
3269 int j, k, total = 0;
3270 for(j=0; j<ic->nb_programs; j++) {
3271 AVMetadataTag *name = av_metadata_get(ic->programs[j]->metadata,
3273 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3274 name ? name->value : "");
3275 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3276 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3277 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3278 printed[ic->programs[j]->stream_index[k]] = 1;
3280 total += ic->programs[j]->nb_stream_indexes;
3282 if (total < ic->nb_streams)
3283 av_log(NULL, AV_LOG_INFO, " No Program\n");
3285 for(i=0;i<ic->nb_streams;i++)
3287 dump_stream_format(ic, i, index, is_output);
3292 int64_t av_gettime(void)
3295 gettimeofday(&tv,NULL);
3296 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3299 uint64_t ff_ntp_time(void)
3301 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3304 #if FF_API_PARSE_DATE
3305 #include "libavutil/parseutils.h"
3307 int64_t parse_date(const char *timestr, int duration)
3310 av_parse_time(&timeval, timestr, duration);
3315 #if FF_API_FIND_INFO_TAG
3316 #include "libavutil/parseutils.h"
3318 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3320 return av_find_info_tag(arg, arg_size, tag1, info);
3324 int av_get_frame_filename(char *buf, int buf_size,
3325 const char *path, int number)
3328 char *q, buf1[20], c;
3329 int nd, len, percentd_found;
3341 while (isdigit(*p)) {
3342 nd = nd * 10 + *p++ - '0';
3345 } while (isdigit(c));
3354 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3356 if ((q - buf + len) > buf_size - 1)
3358 memcpy(q, buf1, len);
3366 if ((q - buf) < buf_size - 1)
3370 if (!percentd_found)
3379 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3383 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3385 for(i=0;i<size;i+=16) {
3392 PRINT(" %02x", buf[i+j]);
3397 for(j=0;j<len;j++) {
3399 if (c < ' ' || c > '~')
3408 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3410 hex_dump_internal(NULL, f, 0, buf, size);
3413 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3415 hex_dump_internal(avcl, NULL, level, buf, size);
3418 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3421 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3422 PRINT("stream #%d:\n", pkt->stream_index);
3423 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3424 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3425 /* DTS is _always_ valid after av_read_frame() */
3427 if (pkt->dts == AV_NOPTS_VALUE)
3430 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3431 /* PTS may not be known if B-frames are present. */
3433 if (pkt->pts == AV_NOPTS_VALUE)
3436 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3438 PRINT(" size=%d\n", pkt->size);
3441 av_hex_dump(f, pkt->data, pkt->size);
3445 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3447 AVRational tb = { 1, AV_TIME_BASE };
3448 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3452 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3454 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3458 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3460 AVRational tb = { 1, AV_TIME_BASE };
3461 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3465 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3468 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3471 void av_url_split(char *proto, int proto_size,
3472 char *authorization, int authorization_size,
3473 char *hostname, int hostname_size,
3475 char *path, int path_size,
3478 const char *p, *ls, *at, *col, *brk;
3480 if (port_ptr) *port_ptr = -1;
3481 if (proto_size > 0) proto[0] = 0;
3482 if (authorization_size > 0) authorization[0] = 0;
3483 if (hostname_size > 0) hostname[0] = 0;
3484 if (path_size > 0) path[0] = 0;
3486 /* parse protocol */
3487 if ((p = strchr(url, ':'))) {
3488 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3493 /* no protocol means plain filename */
3494 av_strlcpy(path, url, path_size);
3498 /* separate path from hostname */
3499 ls = strchr(p, '/');
3501 ls = strchr(p, '?');
3503 av_strlcpy(path, ls, path_size);
3505 ls = &p[strlen(p)]; // XXX
3507 /* the rest is hostname, use that to parse auth/port */
3509 /* authorization (user[:pass]@hostname) */
3510 if ((at = strchr(p, '@')) && at < ls) {
3511 av_strlcpy(authorization, p,
3512 FFMIN(authorization_size, at + 1 - p));
3513 p = at + 1; /* skip '@' */
3516 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3518 av_strlcpy(hostname, p + 1,
3519 FFMIN(hostname_size, brk - p));
3520 if (brk[1] == ':' && port_ptr)
3521 *port_ptr = atoi(brk + 2);
3522 } else if ((col = strchr(p, ':')) && col < ls) {
3523 av_strlcpy(hostname, p,
3524 FFMIN(col + 1 - p, hostname_size));
3525 if (port_ptr) *port_ptr = atoi(col + 1);
3527 av_strlcpy(hostname, p,
3528 FFMIN(ls + 1 - p, hostname_size));
3532 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3535 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3538 'C', 'D', 'E', 'F' };
3539 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3542 'c', 'd', 'e', 'f' };
3543 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3545 for(i = 0; i < s; i++) {
3546 buff[i * 2] = hex_table[src[i] >> 4];
3547 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3553 int ff_hex_to_data(uint8_t *data, const char *p)
3560 p += strspn(p, SPACE_CHARS);
3563 c = toupper((unsigned char) *p++);
3564 if (c >= '0' && c <= '9')
3566 else if (c >= 'A' && c <= 'F')
3581 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3582 unsigned int pts_num, unsigned int pts_den)
3585 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3586 if(new_tb.num != pts_num)
3587 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3589 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3591 if(new_tb.num <= 0 || new_tb.den <= 0) {
3592 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3595 s->time_base = new_tb;
3596 s->pts_wrap_bits = pts_wrap_bits;
3599 int ff_url_join(char *str, int size, const char *proto,
3600 const char *authorization, const char *hostname,
3601 int port, const char *fmt, ...)
3604 struct addrinfo hints, *ai;
3609 av_strlcatf(str, size, "%s://", proto);
3610 if (authorization && authorization[0])
3611 av_strlcatf(str, size, "%s@", authorization);
3612 #if CONFIG_NETWORK && defined(AF_INET6)
3613 /* Determine if hostname is a numerical IPv6 address,
3614 * properly escape it within [] in that case. */
3615 memset(&hints, 0, sizeof(hints));
3616 hints.ai_flags = AI_NUMERICHOST;
3617 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3618 if (ai->ai_family == AF_INET6) {
3619 av_strlcat(str, "[", size);
3620 av_strlcat(str, hostname, size);
3621 av_strlcat(str, "]", size);
3623 av_strlcat(str, hostname, size);
3628 /* Not an IPv6 address, just output the plain string. */
3629 av_strlcat(str, hostname, size);
3632 av_strlcatf(str, size, ":%d", port);
3635 int len = strlen(str);
3638 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3644 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3645 AVFormatContext *src)
3650 local_pkt.stream_index = dst_stream;
3651 if (pkt->pts != AV_NOPTS_VALUE)
3652 local_pkt.pts = av_rescale_q(pkt->pts,
3653 src->streams[pkt->stream_index]->time_base,
3654 dst->streams[dst_stream]->time_base);
3655 if (pkt->dts != AV_NOPTS_VALUE)
3656 local_pkt.dts = av_rescale_q(pkt->dts,
3657 src->streams[pkt->stream_index]->time_base,
3658 dst->streams[dst_stream]->time_base);
3659 return av_write_frame(dst, &local_pkt);
3662 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3665 const char *ptr = str;
3667 /* Parse key=value pairs. */
3670 char *dest = NULL, *dest_end;
3671 int key_len, dest_len = 0;
3673 /* Skip whitespace and potential commas. */
3674 while (*ptr && (isspace(*ptr) || *ptr == ','))
3681 if (!(ptr = strchr(key, '=')))
3684 key_len = ptr - key;
3686 callback_get_buf(context, key, key_len, &dest, &dest_len);
3687 dest_end = dest + dest_len - 1;
3691 while (*ptr && *ptr != '\"') {
3695 if (dest && dest < dest_end)
3699 if (dest && dest < dest_end)
3707 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3708 if (dest && dest < dest_end)
3716 int ff_find_stream_index(AVFormatContext *s, int id)
3719 for (i = 0; i < s->nb_streams; i++) {
3720 if (s->streams[i]->id == id)
3726 void ff_make_absolute_url(char *buf, int size, const char *base,
3730 /* Absolute path, relative to the current server */
3731 if (base && strstr(base, "://") && rel[0] == '/') {
3733 av_strlcpy(buf, base, size);
3734 sep = strstr(buf, "://");
3737 sep = strchr(sep, '/');
3741 av_strlcat(buf, rel, size);
3744 /* If rel actually is an absolute url, just copy it */
3745 if (!base || strstr(rel, "://") || rel[0] == '/') {
3746 av_strlcpy(buf, rel, size);
3750 av_strlcpy(buf, base, size);
3751 /* Remove the file name from the base url */
3752 sep = strrchr(buf, '/');
3757 while (av_strstart(rel, "../", NULL) && sep) {
3758 /* Remove the path delimiter at the end */
3760 sep = strrchr(buf, '/');
3761 /* If the next directory name to pop off is "..", break here */
3762 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3763 /* Readd the slash we just removed */
3764 av_strlcat(buf, "/", size);
3767 /* Cut off the directory name */
3774 av_strlcat(buf, rel, size);