2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/raw.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/pixdesc.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/mathematics.h"
37 #include "audiointerleave.h"
52 * various utility functions for use within FFmpeg
55 unsigned avformat_version(void)
57 return LIBAVFORMAT_VERSION_INT;
60 const char *avformat_configuration(void)
62 return FFMPEG_CONFIGURATION;
65 const char *avformat_license(void)
67 #define LICENSE_PREFIX "libavformat license: "
68 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
71 /* fraction handling */
74 * f = val + (num / den) + 0.5.
76 * 'num' is normalized so that it is such as 0 <= num < den.
78 * @param f fractional number
79 * @param val integer value
80 * @param num must be >= 0
81 * @param den must be >= 1
83 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
96 * Fractional addition to f: f = f + (incr / f->den).
98 * @param f fractional number
99 * @param incr increment, can be positive or negative
101 static void av_frac_add(AVFrac *f, int64_t incr)
114 } else if (num >= den) {
121 /** head of registered input format linked list */
122 static AVInputFormat *first_iformat = NULL;
123 /** head of registered output format linked list */
124 static AVOutputFormat *first_oformat = NULL;
126 AVInputFormat *av_iformat_next(AVInputFormat *f)
128 if(f) return f->next;
129 else return first_iformat;
132 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
134 if(f) return f->next;
135 else return first_oformat;
138 void av_register_input_format(AVInputFormat *format)
142 while (*p != NULL) p = &(*p)->next;
147 void av_register_output_format(AVOutputFormat *format)
151 while (*p != NULL) p = &(*p)->next;
156 int av_match_ext(const char *filename, const char *extensions)
164 ext = strrchr(filename, '.');
170 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
173 if (!strcasecmp(ext1, ext))
183 static int match_format(const char *name, const char *names)
191 namelen = strlen(name);
192 while ((p = strchr(names, ','))) {
193 len = FFMAX(p - names, namelen);
194 if (!strncasecmp(name, names, len))
198 return !strcasecmp(name, names);
201 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
202 const char *mime_type)
204 AVOutputFormat *fmt = NULL, *fmt_found;
205 int score_max, score;
207 /* specific test for image sequences */
208 #if CONFIG_IMAGE2_MUXER
209 if (!short_name && filename &&
210 av_filename_number_test(filename) &&
211 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
212 return av_guess_format("image2", NULL, NULL);
215 /* Find the proper file type. */
218 while ((fmt = av_oformat_next(fmt))) {
220 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
222 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
224 if (filename && fmt->extensions &&
225 av_match_ext(filename, fmt->extensions)) {
228 if (score > score_max) {
236 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
237 const char *filename, const char *mime_type, enum AVMediaType type){
238 if(type == AVMEDIA_TYPE_VIDEO){
239 enum CodecID codec_id= CODEC_ID_NONE;
241 #if CONFIG_IMAGE2_MUXER
242 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
243 codec_id= ff_guess_image2_codec(filename);
246 if(codec_id == CODEC_ID_NONE)
247 codec_id= fmt->video_codec;
249 }else if(type == AVMEDIA_TYPE_AUDIO)
250 return fmt->audio_codec;
251 else if (type == AVMEDIA_TYPE_SUBTITLE)
252 return fmt->subtitle_codec;
254 return CODEC_ID_NONE;
257 AVInputFormat *av_find_input_format(const char *short_name)
259 AVInputFormat *fmt = NULL;
260 while ((fmt = av_iformat_next(fmt))) {
261 if (match_format(short_name, fmt->name))
268 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
270 int ret= av_new_packet(pkt, size);
275 pkt->pos= avio_tell(s);
277 ret= avio_read(s, pkt->data, size);
281 av_shrink_packet(pkt, ret);
286 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
291 return av_get_packet(s, pkt, size);
292 old_size = pkt->size;
293 ret = av_grow_packet(pkt, size);
296 ret = avio_read(s, pkt->data + old_size, size);
297 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
302 int av_filename_number_test(const char *filename)
305 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
308 AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret)
310 AVProbeData lpd = *pd;
311 AVInputFormat *fmt1 = NULL, *fmt;
312 int score, score_max=0;
314 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
315 int id3len = ff_id3v2_tag_len(lpd.buf);
316 if (lpd.buf_size > id3len + 16) {
318 lpd.buf_size -= id3len;
323 while ((fmt1 = av_iformat_next(fmt1))) {
324 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
327 if (fmt1->read_probe) {
328 score = fmt1->read_probe(&lpd);
329 if(!score && fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions))
331 } else if (fmt1->extensions) {
332 if (av_match_ext(lpd.filename, fmt1->extensions)) {
336 if (score > score_max) {
339 }else if (score == score_max)
342 *score_ret= score_max;
346 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
349 AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret);
350 if(score_ret > *score_max){
351 *score_max= score_ret;
357 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
359 return av_probe_input_format2(pd, is_opened, &score);
362 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd)
364 static const struct {
365 const char *name; enum CodecID id; enum AVMediaType type;
367 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
368 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
369 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
370 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
371 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
372 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
373 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
374 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
378 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
382 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
383 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
384 for (i = 0; fmt_id_type[i].name; i++) {
385 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
386 st->codec->codec_id = fmt_id_type[i].id;
387 st->codec->codec_type = fmt_id_type[i].type;
395 /************************************************************/
396 /* input media file */
398 #if FF_API_FORMAT_PARAMETERS
399 static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
402 AVDictionary *opts = NULL;
407 if (ap->time_base.num) {
408 snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
409 av_dict_set(&opts, "framerate", buf, 0);
411 if (ap->sample_rate) {
412 snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
413 av_dict_set(&opts, "sample_rate", buf, 0);
416 snprintf(buf, sizeof(buf), "%d", ap->channels);
417 av_dict_set(&opts, "channels", buf, 0);
419 if (ap->width || ap->height) {
420 snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
421 av_dict_set(&opts, "video_size", buf, 0);
423 if (ap->pix_fmt != PIX_FMT_NONE) {
424 av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
427 snprintf(buf, sizeof(buf), "%d", ap->channel);
428 av_dict_set(&opts, "channel", buf, 0);
431 av_dict_set(&opts, "standard", ap->standard, 0);
433 if (ap->mpeg2ts_compute_pcr) {
434 av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
436 if (ap->initial_pause) {
437 av_dict_set(&opts, "initial_pause", "1", 0);
443 * Open a media file from an IO stream. 'fmt' must be specified.
445 int av_open_input_stream(AVFormatContext **ic_ptr,
446 AVIOContext *pb, const char *filename,
447 AVInputFormat *fmt, AVFormatParameters *ap)
452 AVFormatParameters default_ap;
456 memset(ap, 0, sizeof(default_ap));
458 opts = convert_format_parameters(ap);
460 if(!ap->prealloced_context)
461 *ic_ptr = ic = avformat_alloc_context();
465 err = AVERROR(ENOMEM);
468 if (pb && fmt && fmt->flags & AVFMT_NOFILE)
469 av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
470 "will be ignored with AVFMT_NOFILE format.\n");
474 err = avformat_open_input(&ic, filename, fmt, &opts);
475 ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above
484 int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap){
487 if (ic->iformat->read_header) {
488 err = ic->iformat->read_header(ic, ap);
493 if (ic->pb && !ic->data_offset)
494 ic->data_offset = avio_tell(ic->pb);
500 /** size of probe buffer, for guessing file type from file contents */
501 #define PROBE_BUF_MIN 2048
502 #define PROBE_BUF_MAX (1<<20)
504 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
505 const char *filename, void *logctx,
506 unsigned int offset, unsigned int max_probe_size)
508 AVProbeData pd = { filename ? filename : "", NULL, -offset };
509 unsigned char *buf = NULL;
510 int ret = 0, probe_size;
512 if (!max_probe_size) {
513 max_probe_size = PROBE_BUF_MAX;
514 } else if (max_probe_size > PROBE_BUF_MAX) {
515 max_probe_size = PROBE_BUF_MAX;
516 } else if (max_probe_size < PROBE_BUF_MIN) {
517 return AVERROR(EINVAL);
520 if (offset >= max_probe_size) {
521 return AVERROR(EINVAL);
524 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0;
525 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
526 int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
527 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
529 if (probe_size < offset) {
533 /* read probe data */
534 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
535 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
536 /* fail if error was not end of file, otherwise, lower score */
537 if (ret != AVERROR_EOF) {
542 ret = 0; /* error was end of file, nothing read */
545 pd.buf = &buf[offset];
547 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
549 /* guess file format */
550 *fmt = av_probe_input_format2(&pd, 1, &score);
552 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
553 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
555 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
561 return AVERROR_INVALIDDATA;
564 /* rewind. reuse probe buffer to avoid seeking */
565 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
571 #if FF_API_FORMAT_PARAMETERS
572 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
575 AVFormatParameters *ap)
578 AVDictionary *opts = convert_format_parameters(ap);
580 if (!ap || !ap->prealloced_context)
583 err = avformat_open_input(ic_ptr, filename, fmt, &opts);
590 /* open input file and probe the format if necessary */
591 static int init_input(AVFormatContext *s, const char *filename)
594 AVProbeData pd = {filename, NULL, 0};
597 s->flags |= AVFMT_FLAG_CUSTOM_IO;
599 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
600 else if (s->iformat->flags & AVFMT_NOFILE)
601 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
602 "will be ignored with AVFMT_NOFILE format.\n");
606 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
607 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
610 if ((ret = avio_open(&s->pb, filename, AVIO_FLAG_READ)) < 0)
614 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
617 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
619 AVFormatContext *s = *ps;
621 AVFormatParameters ap = { 0 };
622 AVDictionary *tmp = NULL;
624 if (!s && !(s = avformat_alloc_context()))
625 return AVERROR(ENOMEM);
630 av_dict_copy(&tmp, *options, 0);
632 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
635 if ((ret = init_input(s, filename)) < 0)
638 /* check filename in case an image number is expected */
639 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
640 if (!av_filename_number_test(filename)) {
641 ret = AVERROR(EINVAL);
646 s->duration = s->start_time = AV_NOPTS_VALUE;
647 av_strlcpy(s->filename, filename, sizeof(s->filename));
649 /* allocate private data */
650 if (s->iformat->priv_data_size > 0) {
651 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
652 ret = AVERROR(ENOMEM);
655 if (s->iformat->priv_class) {
656 *(const AVClass**)s->priv_data = s->iformat->priv_class;
657 av_opt_set_defaults(s->priv_data);
658 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
663 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
665 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
667 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
668 if ((ret = s->iformat->read_header(s, &ap)) < 0)
671 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
672 s->data_offset = avio_tell(s->pb);
674 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
677 av_dict_free(options);
685 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
687 avformat_free_context(s);
692 /*******************************************************/
694 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
695 AVPacketList **plast_pktl){
696 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
701 (*plast_pktl)->next = pktl;
703 *packet_buffer = pktl;
705 /* add the packet in the buffered packet list */
711 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
717 AVPacketList *pktl = s->raw_packet_buffer;
721 if(s->streams[pkt->stream_index]->request_probe <= 0){
722 s->raw_packet_buffer = pktl->next;
723 s->raw_packet_buffer_remaining_size += pkt->size;
730 ret= s->iformat->read_packet(s, pkt);
732 if (!pktl || ret == AVERROR(EAGAIN))
734 for (i = 0; i < s->nb_streams; i++)
735 if(s->streams[i]->request_probe > 0)
736 s->streams[i]->request_probe = -1;
740 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
741 av_packet_merge_side_data(pkt);
742 st= s->streams[pkt->stream_index];
744 switch(st->codec->codec_type){
745 case AVMEDIA_TYPE_VIDEO:
746 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
748 case AVMEDIA_TYPE_AUDIO:
749 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
751 case AVMEDIA_TYPE_SUBTITLE:
752 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
756 if(!pktl && st->request_probe <= 0)
759 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
760 s->raw_packet_buffer_remaining_size -= pkt->size;
762 if(st->request_probe>0){
763 AVProbeData *pd = &st->probe_data;
765 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
768 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
769 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
770 pd->buf_size += pkt->size;
771 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
773 end= s->raw_packet_buffer_remaining_size <= 0
774 || st->probe_packets<=0;
776 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
777 int score= set_codec_from_probe_data(s, st, pd);
778 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
782 st->request_probe= -1;
783 if(st->codec->codec_id != CODEC_ID_NONE){
784 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
786 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
793 /**********************************************************/
796 * Get the number of samples of an audio frame. Return -1 on error.
798 static int get_audio_frame_size(AVCodecContext *enc, int size)
802 if(enc->codec_id == CODEC_ID_VORBIS)
805 if (enc->frame_size <= 1) {
806 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
808 if (bits_per_sample) {
809 if (enc->channels == 0)
811 frame_size = (size << 3) / (bits_per_sample * enc->channels);
813 /* used for example by ADPCM codecs */
814 if (enc->bit_rate == 0)
816 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
819 frame_size = enc->frame_size;
826 * Return the frame duration in seconds. Return 0 if not available.
828 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
829 AVCodecParserContext *pc, AVPacket *pkt)
835 switch(st->codec->codec_type) {
836 case AVMEDIA_TYPE_VIDEO:
837 if(st->time_base.num*1000LL > st->time_base.den){
838 *pnum = st->time_base.num;
839 *pden = st->time_base.den;
840 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
841 *pnum = st->codec->time_base.num;
842 *pden = st->codec->time_base.den;
843 if (pc && pc->repeat_pict) {
844 *pnum = (*pnum) * (1 + pc->repeat_pict);
846 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
847 //Thus if we have no parser in such case leave duration undefined.
848 if(st->codec->ticks_per_frame>1 && !pc){
853 case AVMEDIA_TYPE_AUDIO:
854 frame_size = get_audio_frame_size(st->codec, pkt->size);
855 if (frame_size <= 0 || st->codec->sample_rate <= 0)
858 *pden = st->codec->sample_rate;
865 static int is_intra_only(AVCodecContext *enc){
866 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
868 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
869 switch(enc->codec_id){
871 case CODEC_ID_MJPEGB:
873 case CODEC_ID_RAWVIDEO:
874 case CODEC_ID_DVVIDEO:
875 case CODEC_ID_HUFFYUV:
876 case CODEC_ID_FFVHUFF:
881 case CODEC_ID_JPEG2000:
889 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
890 int64_t dts, int64_t pts)
892 AVStream *st= s->streams[stream_index];
893 AVPacketList *pktl= s->packet_buffer;
895 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
898 st->first_dts= dts - st->cur_dts;
901 for(; pktl; pktl= pktl->next){
902 if(pktl->pkt.stream_index != stream_index)
904 //FIXME think more about this check
905 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
906 pktl->pkt.pts += st->first_dts;
908 if(pktl->pkt.dts != AV_NOPTS_VALUE)
909 pktl->pkt.dts += st->first_dts;
911 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
912 st->start_time= pktl->pkt.pts;
914 if (st->start_time == AV_NOPTS_VALUE)
915 st->start_time = pts;
918 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
920 AVPacketList *pktl= s->packet_buffer;
923 if(st->first_dts != AV_NOPTS_VALUE){
924 cur_dts= st->first_dts;
925 for(; pktl; pktl= pktl->next){
926 if(pktl->pkt.stream_index == pkt->stream_index){
927 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
929 cur_dts -= pkt->duration;
932 pktl= s->packet_buffer;
933 st->first_dts = cur_dts;
934 }else if(st->cur_dts)
937 for(; pktl; pktl= pktl->next){
938 if(pktl->pkt.stream_index != pkt->stream_index)
940 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
941 && !pktl->pkt.duration){
942 pktl->pkt.dts= cur_dts;
943 if(!st->codec->has_b_frames)
944 pktl->pkt.pts= cur_dts;
945 cur_dts += pkt->duration;
946 pktl->pkt.duration= pkt->duration;
950 if(st->first_dts == AV_NOPTS_VALUE)
951 st->cur_dts= cur_dts;
954 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
955 AVCodecParserContext *pc, AVPacket *pkt)
957 int num, den, presentation_delayed, delay, i;
960 if (s->flags & AVFMT_FLAG_NOFILLIN)
963 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
964 pkt->dts= AV_NOPTS_VALUE;
966 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
967 //FIXME Set low_delay = 0 when has_b_frames = 1
968 st->codec->has_b_frames = 1;
970 /* do we have a video B-frame ? */
971 delay= st->codec->has_b_frames;
972 presentation_delayed = 0;
974 // ignore delay caused by frame threading so that the mpeg2-without-dts
975 // warning will not trigger
976 if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
977 delay -= st->codec->thread_count-1;
979 /* XXX: need has_b_frame, but cannot get it if the codec is
982 pc && pc->pict_type != AV_PICTURE_TYPE_B)
983 presentation_delayed = 1;
985 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
986 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
987 pkt->dts -= 1LL<<st->pts_wrap_bits;
990 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
991 // we take the conservative approach and discard both
992 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
993 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
994 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
995 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
998 if (pkt->duration == 0) {
999 compute_frame_duration(&num, &den, st, pc, pkt);
1001 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1003 if(pkt->duration != 0 && s->packet_buffer)
1004 update_initial_durations(s, st, pkt);
1008 /* correct timestamps with byte offset if demuxers only have timestamps
1009 on packet boundaries */
1010 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1011 /* this will estimate bitrate based on this frame's duration and size */
1012 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1013 if(pkt->pts != AV_NOPTS_VALUE)
1015 if(pkt->dts != AV_NOPTS_VALUE)
1019 if (pc && pc->dts_sync_point >= 0) {
1020 // we have synchronization info from the parser
1021 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1023 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1024 if (pkt->dts != AV_NOPTS_VALUE) {
1025 // got DTS from the stream, update reference timestamp
1026 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1027 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1028 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1029 // compute DTS based on reference timestamp
1030 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1031 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1033 if (pc->dts_sync_point > 0)
1034 st->reference_dts = pkt->dts; // new reference
1038 /* This may be redundant, but it should not hurt. */
1039 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1040 presentation_delayed = 1;
1042 // 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);
1043 /* interpolate PTS and DTS if they are not present */
1044 //We skip H264 currently because delay and has_b_frames are not reliably set
1045 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1046 if (presentation_delayed) {
1047 /* DTS = decompression timestamp */
1048 /* PTS = presentation timestamp */
1049 if (pkt->dts == AV_NOPTS_VALUE)
1050 pkt->dts = st->last_IP_pts;
1051 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1052 if (pkt->dts == AV_NOPTS_VALUE)
1053 pkt->dts = st->cur_dts;
1055 /* this is tricky: the dts must be incremented by the duration
1056 of the frame we are displaying, i.e. the last I- or P-frame */
1057 if (st->last_IP_duration == 0)
1058 st->last_IP_duration = pkt->duration;
1059 if(pkt->dts != AV_NOPTS_VALUE)
1060 st->cur_dts = pkt->dts + st->last_IP_duration;
1061 st->last_IP_duration = pkt->duration;
1062 st->last_IP_pts= pkt->pts;
1063 /* cannot compute PTS if not present (we can compute it only
1064 by knowing the future */
1065 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1066 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1067 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1068 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1069 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1070 pkt->pts += pkt->duration;
1071 // 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);
1075 /* presentation is not delayed : PTS and DTS are the same */
1076 if(pkt->pts == AV_NOPTS_VALUE)
1077 pkt->pts = pkt->dts;
1078 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1079 if(pkt->pts == AV_NOPTS_VALUE)
1080 pkt->pts = st->cur_dts;
1081 pkt->dts = pkt->pts;
1082 if(pkt->pts != AV_NOPTS_VALUE)
1083 st->cur_dts = pkt->pts + pkt->duration;
1087 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1088 st->pts_buffer[0]= pkt->pts;
1089 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1090 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1091 if(pkt->dts == AV_NOPTS_VALUE)
1092 pkt->dts= st->pts_buffer[0];
1093 if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1094 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1096 if(pkt->dts > st->cur_dts)
1097 st->cur_dts = pkt->dts;
1100 // 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);
1103 if(is_intra_only(st->codec))
1104 pkt->flags |= AV_PKT_FLAG_KEY;
1107 /* keyframe computation */
1108 if (pc->key_frame == 1)
1109 pkt->flags |= AV_PKT_FLAG_KEY;
1110 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
1111 pkt->flags |= AV_PKT_FLAG_KEY;
1114 pkt->convergence_duration = pc->convergence_duration;
1118 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1123 av_init_packet(pkt);
1126 /* select current input stream component */
1129 if (!st->need_parsing || !st->parser) {
1130 /* no parsing needed: we just output the packet as is */
1131 /* raw data support */
1132 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1133 compute_pkt_fields(s, st, NULL, pkt);
1135 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1136 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1137 ff_reduce_index(s, st->index);
1138 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1141 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1142 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1143 st->cur_ptr, st->cur_len,
1144 st->cur_pkt.pts, st->cur_pkt.dts,
1146 st->cur_pkt.pts = AV_NOPTS_VALUE;
1147 st->cur_pkt.dts = AV_NOPTS_VALUE;
1148 /* increment read pointer */
1152 /* return packet if any */
1156 pkt->stream_index = st->index;
1157 pkt->pts = st->parser->pts;
1158 pkt->dts = st->parser->dts;
1159 pkt->pos = st->parser->pos;
1160 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1162 pkt->destruct= st->cur_pkt.destruct;
1163 st->cur_pkt.destruct= NULL;
1164 st->cur_pkt.data = NULL;
1165 assert(st->cur_len == 0);
1167 pkt->destruct = NULL;
1169 compute_pkt_fields(s, st, st->parser, pkt);
1171 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1172 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset;
1173 ff_reduce_index(s, st->index);
1174 av_add_index_entry(st, pos, pkt->dts,
1175 0, 0, AVINDEX_KEYFRAME);
1182 av_free_packet(&st->cur_pkt);
1187 /* read next packet */
1188 ret = av_read_packet(s, &cur_pkt);
1190 if (ret == AVERROR(EAGAIN))
1192 /* return the last frames, if any */
1193 for(i = 0; i < s->nb_streams; i++) {
1195 if (st->parser && st->need_parsing) {
1196 av_parser_parse2(st->parser, st->codec,
1197 &pkt->data, &pkt->size,
1199 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1205 /* no more packets: really terminate parsing */
1208 st = s->streams[cur_pkt.stream_index];
1209 st->cur_pkt= cur_pkt;
1211 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1212 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1213 st->cur_pkt.pts < st->cur_pkt.dts){
1214 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1215 st->cur_pkt.stream_index,
1219 // av_free_packet(&st->cur_pkt);
1223 if(s->debug & FF_FDEBUG_TS)
1224 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1225 st->cur_pkt.stream_index,
1229 st->cur_pkt.duration,
1233 st->cur_ptr = st->cur_pkt.data;
1234 st->cur_len = st->cur_pkt.size;
1235 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1236 st->parser = av_parser_init(st->codec->codec_id);
1238 /* no parser available: just output the raw packets */
1239 st->need_parsing = AVSTREAM_PARSE_NONE;
1240 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1241 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1242 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1243 st->parser->flags |= PARSER_FLAG_ONCE;
1248 if(s->debug & FF_FDEBUG_TS)
1249 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1260 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1264 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1267 pktl = s->packet_buffer;
1269 AVPacket *next_pkt= &pktl->pkt;
1271 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1272 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1273 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1274 if( pktl->pkt.stream_index == next_pkt->stream_index
1275 && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1276 && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1277 next_pkt->pts= pktl->pkt.dts;
1281 pktl = s->packet_buffer;
1284 if( next_pkt->pts != AV_NOPTS_VALUE
1285 || next_pkt->dts == AV_NOPTS_VALUE
1287 /* read packet from packet buffer, if there is data */
1289 s->packet_buffer = pktl->next;
1295 int ret= av_read_frame_internal(s, pkt);
1297 if(pktl && ret != AVERROR(EAGAIN)){
1304 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1305 &s->packet_buffer_end)) < 0)
1306 return AVERROR(ENOMEM);
1308 assert(!s->packet_buffer);
1309 return av_read_frame_internal(s, pkt);
1314 /* XXX: suppress the packet queue */
1315 static void flush_packet_queue(AVFormatContext *s)
1320 pktl = s->packet_buffer;
1323 s->packet_buffer = pktl->next;
1324 av_free_packet(&pktl->pkt);
1327 while(s->raw_packet_buffer){
1328 pktl = s->raw_packet_buffer;
1329 s->raw_packet_buffer = pktl->next;
1330 av_free_packet(&pktl->pkt);
1333 s->packet_buffer_end=
1334 s->raw_packet_buffer_end= NULL;
1335 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1338 /*******************************************************/
1341 int av_find_default_stream_index(AVFormatContext *s)
1343 int first_audio_index = -1;
1347 if (s->nb_streams <= 0)
1349 for(i = 0; i < s->nb_streams; i++) {
1351 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1354 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1355 first_audio_index = i;
1357 return first_audio_index >= 0 ? first_audio_index : 0;
1361 * Flush the frame reader.
1363 void ff_read_frame_flush(AVFormatContext *s)
1368 flush_packet_queue(s);
1372 /* for each stream, reset read state */
1373 for(i = 0; i < s->nb_streams; i++) {
1377 av_parser_close(st->parser);
1379 av_free_packet(&st->cur_pkt);
1381 st->last_IP_pts = AV_NOPTS_VALUE;
1382 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1383 st->reference_dts = AV_NOPTS_VALUE;
1388 st->probe_packets = MAX_PROBE_PACKETS;
1390 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1391 st->pts_buffer[j]= AV_NOPTS_VALUE;
1395 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1398 for(i = 0; i < s->nb_streams; i++) {
1399 AVStream *st = s->streams[i];
1401 st->cur_dts = av_rescale(timestamp,
1402 st->time_base.den * (int64_t)ref_st->time_base.num,
1403 st->time_base.num * (int64_t)ref_st->time_base.den);
1407 void ff_reduce_index(AVFormatContext *s, int stream_index)
1409 AVStream *st= s->streams[stream_index];
1410 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1412 if((unsigned)st->nb_index_entries >= max_entries){
1414 for(i=0; 2*i<st->nb_index_entries; i++)
1415 st->index_entries[i]= st->index_entries[2*i];
1416 st->nb_index_entries= i;
1420 int ff_add_index_entry(AVIndexEntry **index_entries,
1421 int *nb_index_entries,
1422 unsigned int *index_entries_allocated_size,
1423 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1425 AVIndexEntry *entries, *ie;
1428 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1431 entries = av_fast_realloc(*index_entries,
1432 index_entries_allocated_size,
1433 (*nb_index_entries + 1) *
1434 sizeof(AVIndexEntry));
1438 *index_entries= entries;
1440 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1443 index= (*nb_index_entries)++;
1444 ie= &entries[index];
1445 assert(index==0 || ie[-1].timestamp < timestamp);
1447 ie= &entries[index];
1448 if(ie->timestamp != timestamp){
1449 if(ie->timestamp <= timestamp)
1451 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1452 (*nb_index_entries)++;
1453 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1454 distance= ie->min_distance;
1458 ie->timestamp = timestamp;
1459 ie->min_distance= distance;
1466 int av_add_index_entry(AVStream *st,
1467 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1469 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1470 &st->index_entries_allocated_size, pos,
1471 timestamp, size, distance, flags);
1474 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1475 int64_t wanted_timestamp, int flags)
1483 //optimize appending index entries at the end
1484 if(b && entries[b-1].timestamp < wanted_timestamp)
1489 timestamp = entries[m].timestamp;
1490 if(timestamp >= wanted_timestamp)
1492 if(timestamp <= wanted_timestamp)
1495 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1497 if(!(flags & AVSEEK_FLAG_ANY)){
1498 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1499 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1508 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1511 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1512 wanted_timestamp, flags);
1515 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1516 AVInputFormat *avif= s->iformat;
1517 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1518 int64_t ts_min, ts_max, ts;
1523 if (stream_index < 0)
1526 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1529 ts_min= AV_NOPTS_VALUE;
1530 pos_limit= -1; //gcc falsely says it may be uninitialized
1532 st= s->streams[stream_index];
1533 if(st->index_entries){
1536 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()
1537 index= FFMAX(index, 0);
1538 e= &st->index_entries[index];
1540 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1542 ts_min= e->timestamp;
1543 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1549 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1550 assert(index < st->nb_index_entries);
1552 e= &st->index_entries[index];
1553 assert(e->timestamp >= target_ts);
1555 ts_max= e->timestamp;
1556 pos_limit= pos_max - e->min_distance;
1557 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1558 pos_max,pos_limit, ts_max);
1562 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1567 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1570 av_update_cur_dts(s, st, ts);
1575 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 )){
1577 int64_t start_pos, filesize;
1580 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1582 if(ts_min == AV_NOPTS_VALUE){
1583 pos_min = s->data_offset;
1584 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1585 if (ts_min == AV_NOPTS_VALUE)
1589 if(ts_max == AV_NOPTS_VALUE){
1591 filesize = avio_size(s->pb);
1592 pos_max = filesize - 1;
1595 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1597 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1598 if (ts_max == AV_NOPTS_VALUE)
1602 int64_t tmp_pos= pos_max + 1;
1603 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1604 if(tmp_ts == AV_NOPTS_VALUE)
1608 if(tmp_pos >= filesize)
1614 if(ts_min > ts_max){
1616 }else if(ts_min == ts_max){
1621 while (pos_min < pos_limit) {
1622 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1623 pos_min, pos_max, ts_min, ts_max);
1624 assert(pos_limit <= pos_max);
1627 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1628 // interpolate position (better than dichotomy)
1629 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1630 + pos_min - approximate_keyframe_distance;
1631 }else if(no_change==1){
1632 // bisection, if interpolation failed to change min or max pos last time
1633 pos = (pos_min + pos_limit)>>1;
1635 /* linear search if bisection failed, can only happen if there
1636 are very few or no keyframes between min/max */
1641 else if(pos > pos_limit)
1645 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1650 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1651 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1652 pos_limit, start_pos, no_change);
1653 if(ts == AV_NOPTS_VALUE){
1654 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1657 assert(ts != AV_NOPTS_VALUE);
1658 if (target_ts <= ts) {
1659 pos_limit = start_pos - 1;
1663 if (target_ts >= ts) {
1669 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1670 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1672 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1674 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1675 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1676 pos, ts_min, target_ts, ts_max);
1681 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1682 int64_t pos_min, pos_max;
1686 if (stream_index < 0)
1689 st= s->streams[stream_index];
1692 pos_min = s->data_offset;
1693 pos_max = avio_size(s->pb) - 1;
1695 if (pos < pos_min) pos= pos_min;
1696 else if(pos > pos_max) pos= pos_max;
1698 avio_seek(s->pb, pos, SEEK_SET);
1701 av_update_cur_dts(s, st, ts);
1706 static int av_seek_frame_generic(AVFormatContext *s,
1707 int stream_index, int64_t timestamp, int flags)
1714 st = s->streams[stream_index];
1716 index = av_index_search_timestamp(st, timestamp, flags);
1718 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1721 if(index < 0 || index==st->nb_index_entries-1){
1725 if(st->nb_index_entries){
1726 assert(st->index_entries);
1727 ie= &st->index_entries[st->nb_index_entries-1];
1728 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1730 av_update_cur_dts(s, st, ie->timestamp);
1732 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1738 ret = av_read_frame(s, &pkt);
1739 }while(ret == AVERROR(EAGAIN));
1742 av_free_packet(&pkt);
1743 if(stream_index == pkt.stream_index){
1744 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1748 index = av_index_search_timestamp(st, timestamp, flags);
1753 ff_read_frame_flush(s);
1754 if (s->iformat->read_seek){
1755 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1758 ie = &st->index_entries[index];
1759 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1761 av_update_cur_dts(s, st, ie->timestamp);
1766 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1771 ff_read_frame_flush(s);
1773 if(flags & AVSEEK_FLAG_BYTE)
1774 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1776 if(stream_index < 0){
1777 stream_index= av_find_default_stream_index(s);
1778 if(stream_index < 0)
1781 st= s->streams[stream_index];
1782 /* timestamp for default must be expressed in AV_TIME_BASE units */
1783 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1786 /* first, we try the format specific seek */
1787 if (s->iformat->read_seek)
1788 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1795 if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
1796 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1797 else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
1798 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1803 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1805 if(min_ts > ts || max_ts < ts)
1808 ff_read_frame_flush(s);
1810 if (s->iformat->read_seek2)
1811 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1813 if(s->iformat->read_timestamp){
1814 //try to seek via read_timestamp()
1817 //Fallback to old API if new is not implemented but old is
1818 //Note the old has somewat different sematics
1819 if(s->iformat->read_seek || 1)
1820 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1822 // try some generic seek like av_seek_frame_generic() but with new ts semantics
1825 /*******************************************************/
1828 * Return TRUE if the stream has accurate duration in any stream.
1830 * @return TRUE if the stream has accurate duration for at least one component.
1832 static int av_has_duration(AVFormatContext *ic)
1837 for(i = 0;i < ic->nb_streams; i++) {
1838 st = ic->streams[i];
1839 if (st->duration != AV_NOPTS_VALUE)
1846 * Estimate the stream timings from the one of each components.
1848 * Also computes the global bitrate if possible.
1850 static void av_update_stream_timings(AVFormatContext *ic)
1852 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
1853 int64_t duration, duration1;
1857 start_time = INT64_MAX;
1858 start_time_text = INT64_MAX;
1859 end_time = INT64_MIN;
1860 duration = INT64_MIN;
1861 for(i = 0;i < ic->nb_streams; i++) {
1862 st = ic->streams[i];
1863 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1864 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1865 if (st->codec->codec_id == CODEC_ID_DVB_TELETEXT) {
1866 if (start_time1 < start_time_text)
1867 start_time_text = start_time1;
1869 if (start_time1 < start_time)
1870 start_time = start_time1;
1871 if (st->duration != AV_NOPTS_VALUE) {
1872 end_time1 = start_time1
1873 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1874 if (end_time1 > end_time)
1875 end_time = end_time1;
1878 if (st->duration != AV_NOPTS_VALUE) {
1879 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1880 if (duration1 > duration)
1881 duration = duration1;
1884 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
1885 start_time = start_time_text;
1886 if (start_time != INT64_MAX) {
1887 ic->start_time = start_time;
1888 if (end_time != INT64_MIN) {
1889 if (end_time - start_time > duration)
1890 duration = end_time - start_time;
1893 if (duration != INT64_MIN) {
1894 ic->duration = duration;
1895 if (ic->file_size > 0) {
1896 /* compute the bitrate */
1897 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1898 (double)ic->duration;
1903 static void fill_all_stream_timings(AVFormatContext *ic)
1908 av_update_stream_timings(ic);
1909 for(i = 0;i < ic->nb_streams; i++) {
1910 st = ic->streams[i];
1911 if (st->start_time == AV_NOPTS_VALUE) {
1912 if(ic->start_time != AV_NOPTS_VALUE)
1913 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1914 if(ic->duration != AV_NOPTS_VALUE)
1915 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1920 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1922 int64_t filesize, duration;
1926 /* if bit_rate is already set, we believe it */
1927 if (ic->bit_rate <= 0) {
1929 for(i=0;i<ic->nb_streams;i++) {
1930 st = ic->streams[i];
1931 if (st->codec->bit_rate > 0)
1932 bit_rate += st->codec->bit_rate;
1934 ic->bit_rate = bit_rate;
1937 /* if duration is already set, we believe it */
1938 if (ic->duration == AV_NOPTS_VALUE &&
1939 ic->bit_rate != 0 &&
1940 ic->file_size != 0) {
1941 filesize = ic->file_size;
1943 for(i = 0; i < ic->nb_streams; i++) {
1944 st = ic->streams[i];
1945 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1946 if (st->duration == AV_NOPTS_VALUE)
1947 st->duration = duration;
1953 #define DURATION_MAX_READ_SIZE 250000
1954 #define DURATION_MAX_RETRY 3
1956 /* only usable for MPEG-PS streams */
1957 static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1959 AVPacket pkt1, *pkt = &pkt1;
1961 int read_size, i, ret;
1963 int64_t filesize, offset, duration;
1968 /* flush packet queue */
1969 flush_packet_queue(ic);
1971 for (i=0; i<ic->nb_streams; i++) {
1972 st = ic->streams[i];
1973 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1974 av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n");
1977 av_parser_close(st->parser);
1979 av_free_packet(&st->cur_pkt);
1983 /* estimate the end time (duration) */
1984 /* XXX: may need to support wrapping */
1985 filesize = ic->file_size;
1986 end_time = AV_NOPTS_VALUE;
1988 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1992 avio_seek(ic->pb, offset, SEEK_SET);
1995 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1999 ret = av_read_packet(ic, pkt);
2000 }while(ret == AVERROR(EAGAIN));
2003 read_size += pkt->size;
2004 st = ic->streams[pkt->stream_index];
2005 if (pkt->pts != AV_NOPTS_VALUE &&
2006 (st->start_time != AV_NOPTS_VALUE ||
2007 st->first_dts != AV_NOPTS_VALUE)) {
2008 duration = end_time = pkt->pts;
2009 if (st->start_time != AV_NOPTS_VALUE) duration -= st->start_time;
2010 else duration -= st->first_dts;
2012 duration += 1LL<<st->pts_wrap_bits;
2014 if (st->duration == AV_NOPTS_VALUE ||
2015 st->duration < duration)
2016 st->duration = duration;
2019 av_free_packet(pkt);
2021 }while( end_time==AV_NOPTS_VALUE
2022 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2023 && ++retry <= DURATION_MAX_RETRY);
2025 fill_all_stream_timings(ic);
2027 avio_seek(ic->pb, old_offset, SEEK_SET);
2028 for (i=0; i<ic->nb_streams; i++) {
2030 st->cur_dts= st->first_dts;
2031 st->last_IP_pts = AV_NOPTS_VALUE;
2032 st->reference_dts = AV_NOPTS_VALUE;
2036 static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset)
2040 /* get the file size, if possible */
2041 if (ic->iformat->flags & AVFMT_NOFILE) {
2044 file_size = avio_size(ic->pb);
2048 ic->file_size = file_size;
2050 if ((!strcmp(ic->iformat->name, "mpeg") ||
2051 !strcmp(ic->iformat->name, "mpegts")) &&
2052 file_size && ic->pb->seekable) {
2053 /* get accurate estimate from the PTSes */
2054 av_estimate_timings_from_pts(ic, old_offset);
2055 } else if (av_has_duration(ic)) {
2056 /* at least one component has timings - we use them for all
2058 fill_all_stream_timings(ic);
2060 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2061 /* less precise: use bitrate info */
2062 av_estimate_timings_from_bit_rate(ic);
2064 av_update_stream_timings(ic);
2069 AVStream av_unused *st;
2070 for(i = 0;i < ic->nb_streams; i++) {
2071 st = ic->streams[i];
2072 printf("%d: start_time: %0.3f duration: %0.3f\n",
2073 i, (double)st->start_time / AV_TIME_BASE,
2074 (double)st->duration / AV_TIME_BASE);
2076 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2077 (double)ic->start_time / AV_TIME_BASE,
2078 (double)ic->duration / AV_TIME_BASE,
2079 ic->bit_rate / 1000);
2084 static int has_codec_parameters(AVCodecContext *enc)
2087 switch(enc->codec_type) {
2088 case AVMEDIA_TYPE_AUDIO:
2089 val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE;
2090 if(!enc->frame_size &&
2091 (enc->codec_id == CODEC_ID_VORBIS ||
2092 enc->codec_id == CODEC_ID_AAC ||
2093 enc->codec_id == CODEC_ID_MP1 ||
2094 enc->codec_id == CODEC_ID_MP2 ||
2095 enc->codec_id == CODEC_ID_MP3 ||
2096 enc->codec_id == CODEC_ID_SPEEX ||
2097 enc->codec_id == CODEC_ID_CELT))
2100 case AVMEDIA_TYPE_VIDEO:
2101 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
2107 return enc->codec_id != CODEC_ID_NONE && val != 0;
2110 static int has_decode_delay_been_guessed(AVStream *st)
2112 return st->codec->codec_id != CODEC_ID_H264 ||
2113 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2116 static int try_decode_frame(AVStream *st, AVPacket *avpkt)
2120 int got_picture, data_size, ret=0;
2123 if(!st->codec->codec){
2124 codec = avcodec_find_decoder(st->codec->codec_id);
2127 ret = avcodec_open(st->codec, codec);
2132 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){
2133 switch(st->codec->codec_type) {
2134 case AVMEDIA_TYPE_VIDEO:
2135 avcodec_get_frame_defaults(&picture);
2136 ret = avcodec_decode_video2(st->codec, &picture,
2137 &got_picture, avpkt);
2139 case AVMEDIA_TYPE_AUDIO:
2140 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2141 samples = av_malloc(data_size);
2144 ret = avcodec_decode_audio3(st->codec, samples,
2156 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2158 while (tags->id != CODEC_ID_NONE) {
2166 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2169 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2170 if(tag == tags[i].tag)
2173 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2174 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2177 return CODEC_ID_NONE;
2180 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2183 for(i=0; tags && tags[i]; i++){
2184 int tag= ff_codec_get_tag(tags[i], id);
2190 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2193 for(i=0; tags && tags[i]; i++){
2194 enum CodecID id= ff_codec_get_id(tags[i], tag);
2195 if(id!=CODEC_ID_NONE) return id;
2197 return CODEC_ID_NONE;
2200 static void compute_chapters_end(AVFormatContext *s)
2203 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2205 for (i = 0; i < s->nb_chapters; i++)
2206 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2207 AVChapter *ch = s->chapters[i];
2208 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2211 for (j = 0; j < s->nb_chapters; j++) {
2212 AVChapter *ch1 = s->chapters[j];
2213 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2214 if (j != i && next_start > ch->start && next_start < end)
2217 ch->end = (end == INT64_MAX) ? ch->start : end;
2221 static int get_std_framerate(int i){
2222 if(i<60*12) return i*1001;
2223 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2227 * Is the time base unreliable.
2228 * This is a heuristic to balance between quick acceptance of the values in
2229 * the headers vs. some extra checks.
2230 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2231 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2232 * And there are "variable" fps files this needs to detect as well.
2234 static int tb_unreliable(AVCodecContext *c){
2235 if( c->time_base.den >= 101L*c->time_base.num
2236 || c->time_base.den < 5L*c->time_base.num
2237 /* || c->codec_tag == AV_RL32("DIVX")
2238 || c->codec_tag == AV_RL32("XVID")*/
2239 || c->codec_id == CODEC_ID_MPEG2VIDEO
2240 || c->codec_id == CODEC_ID_H264
2246 int av_find_stream_info(AVFormatContext *ic)
2248 int i, count, ret, read_size, j;
2250 AVPacket pkt1, *pkt;
2251 int64_t old_offset = avio_tell(ic->pb);
2253 for(i=0;i<ic->nb_streams;i++) {
2255 st = ic->streams[i];
2257 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2258 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2259 /* if(!st->time_base.num)
2261 if(!st->codec->time_base.num)
2262 st->codec->time_base= st->time_base;
2264 //only for the split stuff
2265 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2266 st->parser = av_parser_init(st->codec->codec_id);
2267 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2268 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2271 assert(!st->codec->codec);
2272 codec = avcodec_find_decoder(st->codec->codec_id);
2274 /* Ensure that subtitle_header is properly set. */
2275 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2276 && codec && !st->codec->codec)
2277 avcodec_open(st->codec, codec);
2279 //try to just open decoders, in case this is enough to get parameters
2280 if(!has_codec_parameters(st->codec)){
2281 if (codec && !st->codec->codec)
2282 avcodec_open(st->codec, codec);
2286 for (i=0; i<ic->nb_streams; i++) {
2287 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2293 if(url_interrupt_cb()){
2295 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2299 /* check if one codec still needs to be handled */
2300 for(i=0;i<ic->nb_streams;i++) {
2301 int fps_analyze_framecount = 20;
2303 st = ic->streams[i];
2304 if (!has_codec_parameters(st->codec))
2306 /* if the timebase is coarse (like the usual millisecond precision
2307 of mkv), we need to analyze more frames to reliably arrive at
2309 if (av_q2d(st->time_base) > 0.0005)
2310 fps_analyze_framecount *= 2;
2311 if (ic->fps_probe_size >= 0)
2312 fps_analyze_framecount = ic->fps_probe_size;
2313 /* variable fps and no guess at the real fps */
2314 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2315 && st->info->duration_count < fps_analyze_framecount
2316 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2318 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2320 if(st->first_dts == AV_NOPTS_VALUE)
2323 if (i == ic->nb_streams) {
2324 /* NOTE: if the format has no header, then we need to read
2325 some packets to get most of the streams, so we cannot
2327 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2328 /* if we found the info for all the codecs, we can stop */
2330 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2334 /* we did not get all the codec info, but we read too much data */
2335 if (read_size >= ic->probesize) {
2337 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2341 /* NOTE: a new stream can be added there if no header in file
2342 (AVFMTCTX_NOHEADER) */
2343 ret = av_read_frame_internal(ic, &pkt1);
2344 if (ret == AVERROR(EAGAIN))
2349 ret = -1; /* we could not have all the codec parameters before EOF */
2350 for(i=0;i<ic->nb_streams;i++) {
2351 st = ic->streams[i];
2352 if (!has_codec_parameters(st->codec)){
2354 avcodec_string(buf, sizeof(buf), st->codec, 0);
2355 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2363 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2364 if ((ret = av_dup_packet(pkt)) < 0)
2365 goto find_stream_info_err;
2367 read_size += pkt->size;
2369 st = ic->streams[pkt->stream_index];
2370 if (st->codec_info_nb_frames>1) {
2372 if (st->time_base.den > 0 && (t=av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q)) >= ic->max_analyze_duration) {
2373 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2376 st->info->codec_info_duration += pkt->duration;
2379 int64_t last = st->info->last_dts;
2380 int64_t duration= pkt->dts - last;
2382 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2383 double dur= duration * av_q2d(st->time_base);
2385 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2386 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2387 if (st->info->duration_count < 2)
2388 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2389 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2390 int framerate= get_std_framerate(i);
2391 int ticks= lrintf(dur*framerate/(1001*12));
2392 double error= dur - ticks*1001*12/(double)framerate;
2393 st->info->duration_error[i] += error*error;
2395 st->info->duration_count++;
2396 // ignore the first 4 values, they might have some random jitter
2397 if (st->info->duration_count > 3)
2398 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2400 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2401 st->info->last_dts = pkt->dts;
2403 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2404 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2406 st->codec->extradata_size= i;
2407 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2408 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2409 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2413 /* if still no information, we try to open the codec and to
2414 decompress the frame. We try to avoid that in most cases as
2415 it takes longer and uses more memory. For MPEG-4, we need to
2416 decompress for QuickTime.
2418 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2419 least one frame of codec data, this makes sure the codec initializes
2420 the channel configuration and does not only trust the values from the container.
2422 if (!has_codec_parameters(st->codec) ||
2423 !has_decode_delay_been_guessed(st) ||
2424 (st->codec->codec &&
2425 st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))
2426 try_decode_frame(st, pkt);
2428 st->codec_info_nb_frames++;
2432 // close codecs which were opened in try_decode_frame()
2433 for(i=0;i<ic->nb_streams;i++) {
2434 st = ic->streams[i];
2435 if(st->codec->codec)
2436 avcodec_close(st->codec);
2438 for(i=0;i<ic->nb_streams;i++) {
2439 st = ic->streams[i];
2440 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2441 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2442 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2443 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2444 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2445 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2446 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2447 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2448 st->codec->codec_tag= tag;
2451 // the check for tb_unreliable() is not completely correct, since this is not about handling
2452 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2453 // ipmovie.c produces.
2454 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
2455 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);
2456 if (st->info->duration_count && !st->r_frame_rate.num
2457 && tb_unreliable(st->codec) /*&&
2458 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2459 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2461 double best_error= 2*av_q2d(st->time_base);
2462 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2464 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2465 double error = st->info->duration_error[j] * get_std_framerate(j);
2466 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2467 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2468 if(error < best_error){
2470 num = get_std_framerate(j);
2473 // do not increase frame rate by more than 1 % in order to match a standard rate.
2474 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2475 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2478 if (!st->r_frame_rate.num){
2479 if( st->codec->time_base.den * (int64_t)st->time_base.num
2480 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2481 st->r_frame_rate.num = st->codec->time_base.den;
2482 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2484 st->r_frame_rate.num = st->time_base.den;
2485 st->r_frame_rate.den = st->time_base.num;
2488 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2489 if(!st->codec->bits_per_coded_sample)
2490 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2491 // set stream disposition based on audio service type
2492 switch (st->codec->audio_service_type) {
2493 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2494 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2495 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2496 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2497 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2498 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2499 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2500 st->disposition = AV_DISPOSITION_COMMENT; break;
2501 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2502 st->disposition = AV_DISPOSITION_KARAOKE; break;
2507 av_estimate_timings(ic, old_offset);
2509 compute_chapters_end(ic);
2512 /* correct DTS for B-frame streams with no timestamps */
2513 for(i=0;i<ic->nb_streams;i++) {
2514 st = ic->streams[i];
2515 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2517 ppktl = &ic->packet_buffer;
2519 if(ppkt1->stream_index != i)
2521 if(ppkt1->pkt->dts < 0)
2523 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2525 ppkt1->pkt->dts -= delta;
2530 st->cur_dts -= delta;
2536 find_stream_info_err:
2537 for (i=0; i < ic->nb_streams; i++)
2538 av_freep(&ic->streams[i]->info);
2542 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2546 for (i = 0; i < ic->nb_programs; i++)
2547 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2548 if (ic->programs[i]->stream_index[j] == s)
2549 return ic->programs[i];
2553 int av_find_best_stream(AVFormatContext *ic,
2554 enum AVMediaType type,
2555 int wanted_stream_nb,
2557 AVCodec **decoder_ret,
2560 int i, nb_streams = ic->nb_streams;
2561 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2562 unsigned *program = NULL;
2563 AVCodec *decoder = NULL, *best_decoder = NULL;
2565 if (related_stream >= 0 && wanted_stream_nb < 0) {
2566 AVProgram *p = find_program_from_stream(ic, related_stream);
2568 program = p->stream_index;
2569 nb_streams = p->nb_stream_indexes;
2572 for (i = 0; i < nb_streams; i++) {
2573 int real_stream_index = program ? program[i] : i;
2574 AVStream *st = ic->streams[real_stream_index];
2575 AVCodecContext *avctx = st->codec;
2576 if (avctx->codec_type != type)
2578 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2580 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2583 decoder = avcodec_find_decoder(st->codec->codec_id);
2586 ret = AVERROR_DECODER_NOT_FOUND;
2590 if (best_count >= st->codec_info_nb_frames)
2592 best_count = st->codec_info_nb_frames;
2593 ret = real_stream_index;
2594 best_decoder = decoder;
2595 if (program && i == nb_streams - 1 && ret < 0) {
2597 nb_streams = ic->nb_streams;
2598 i = 0; /* no related stream found, try again with everything */
2602 *decoder_ret = best_decoder;
2606 /*******************************************************/
2608 int av_read_play(AVFormatContext *s)
2610 if (s->iformat->read_play)
2611 return s->iformat->read_play(s);
2613 return avio_pause(s->pb, 0);
2614 return AVERROR(ENOSYS);
2617 int av_read_pause(AVFormatContext *s)
2619 if (s->iformat->read_pause)
2620 return s->iformat->read_pause(s);
2622 return avio_pause(s->pb, 1);
2623 return AVERROR(ENOSYS);
2626 void av_close_input_stream(AVFormatContext *s)
2628 flush_packet_queue(s);
2629 if (s->iformat->read_close)
2630 s->iformat->read_close(s);
2631 avformat_free_context(s);
2634 void avformat_free_context(AVFormatContext *s)
2640 if (s->iformat && s->iformat->priv_class && s->priv_data)
2641 av_opt_free(s->priv_data);
2643 for(i=0;i<s->nb_streams;i++) {
2644 /* free all data in a stream component */
2647 av_parser_close(st->parser);
2648 av_free_packet(&st->cur_pkt);
2650 av_dict_free(&st->metadata);
2651 av_free(st->index_entries);
2652 av_free(st->codec->extradata);
2653 av_free(st->codec->subtitle_header);
2655 av_free(st->priv_data);
2659 for(i=s->nb_programs-1; i>=0; i--) {
2660 av_dict_free(&s->programs[i]->metadata);
2661 av_freep(&s->programs[i]->stream_index);
2662 av_freep(&s->programs[i]);
2664 av_freep(&s->programs);
2665 av_freep(&s->priv_data);
2666 while(s->nb_chapters--) {
2667 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2668 av_free(s->chapters[s->nb_chapters]);
2670 av_freep(&s->chapters);
2671 av_dict_free(&s->metadata);
2672 av_freep(&s->streams);
2676 void av_close_input_file(AVFormatContext *s)
2678 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2680 av_close_input_stream(s);
2685 AVStream *av_new_stream(AVFormatContext *s, int id)
2691 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2693 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2696 s->streams = streams;
2698 st = av_mallocz(sizeof(AVStream));
2701 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2706 st->codec= avcodec_alloc_context();
2708 /* no default bitrate if decoding */
2709 st->codec->bit_rate = 0;
2711 st->index = s->nb_streams;
2713 st->start_time = AV_NOPTS_VALUE;
2714 st->duration = AV_NOPTS_VALUE;
2715 /* we set the current DTS to 0 so that formats without any timestamps
2716 but durations get some timestamps, formats with some unknown
2717 timestamps have their first few packets buffered and the
2718 timestamps corrected before they are returned to the user */
2720 st->first_dts = AV_NOPTS_VALUE;
2721 st->probe_packets = MAX_PROBE_PACKETS;
2723 /* default pts setting is MPEG-like */
2724 av_set_pts_info(st, 33, 1, 90000);
2725 st->last_IP_pts = AV_NOPTS_VALUE;
2726 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2727 st->pts_buffer[i]= AV_NOPTS_VALUE;
2728 st->reference_dts = AV_NOPTS_VALUE;
2730 st->sample_aspect_ratio = (AVRational){0,1};
2732 s->streams[s->nb_streams++] = st;
2736 AVProgram *av_new_program(AVFormatContext *ac, int id)
2738 AVProgram *program=NULL;
2741 av_dlog(ac, "new_program: id=0x%04x\n", id);
2743 for(i=0; i<ac->nb_programs; i++)
2744 if(ac->programs[i]->id == id)
2745 program = ac->programs[i];
2748 program = av_mallocz(sizeof(AVProgram));
2751 dynarray_add(&ac->programs, &ac->nb_programs, program);
2752 program->discard = AVDISCARD_NONE;
2759 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2761 AVChapter *chapter = NULL;
2764 for(i=0; i<s->nb_chapters; i++)
2765 if(s->chapters[i]->id == id)
2766 chapter = s->chapters[i];
2769 chapter= av_mallocz(sizeof(AVChapter));
2772 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2774 av_dict_set(&chapter->metadata, "title", title, 0);
2776 chapter->time_base= time_base;
2777 chapter->start = start;
2783 /************************************************************/
2784 /* output media file */
2786 #if FF_API_FORMAT_PARAMETERS
2787 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2789 if (s->oformat->priv_data_size > 0) {
2790 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2792 return AVERROR(ENOMEM);
2793 if (s->oformat->priv_class) {
2794 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2795 av_opt_set_defaults(s->priv_data);
2798 s->priv_data = NULL;
2804 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
2805 const char *format, const char *filename)
2807 AVFormatContext *s = avformat_alloc_context();
2816 oformat = av_guess_format(format, NULL, NULL);
2818 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
2819 ret = AVERROR(EINVAL);
2823 oformat = av_guess_format(NULL, filename, NULL);
2825 ret = AVERROR(EINVAL);
2826 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
2833 s->oformat = oformat;
2834 if (s->oformat->priv_data_size > 0) {
2835 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2838 if (s->oformat->priv_class) {
2839 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2840 av_opt_set_defaults(s->priv_data);
2843 s->priv_data = NULL;
2846 av_strlcpy(s->filename, filename, sizeof(s->filename));
2850 av_log(s, AV_LOG_ERROR, "Out of memory\n");
2851 ret = AVERROR(ENOMEM);
2853 avformat_free_context(s);
2857 #if FF_API_ALLOC_OUTPUT_CONTEXT
2858 AVFormatContext *avformat_alloc_output_context(const char *format,
2859 AVOutputFormat *oformat, const char *filename)
2861 AVFormatContext *avctx;
2862 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
2863 return ret < 0 ? NULL : avctx;
2867 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2869 const AVCodecTag *avctag;
2871 enum CodecID id = CODEC_ID_NONE;
2872 unsigned int tag = 0;
2875 * Check that tag + id is in the table
2876 * If neither is in the table -> OK
2877 * If tag is in the table with another id -> FAIL
2878 * If id is in the table with another tag -> FAIL unless strict < normal
2880 for (n = 0; s->oformat->codec_tag[n]; n++) {
2881 avctag = s->oformat->codec_tag[n];
2882 while (avctag->id != CODEC_ID_NONE) {
2883 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2885 if (id == st->codec->codec_id)
2888 if (avctag->id == st->codec->codec_id)
2893 if (id != CODEC_ID_NONE)
2895 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2900 #if FF_API_FORMAT_PARAMETERS
2901 int av_write_header(AVFormatContext *s)
2903 return avformat_write_header(s, NULL);
2907 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2911 AVDictionary *tmp = NULL;
2914 av_dict_copy(&tmp, *options, 0);
2915 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2918 // some sanity checks
2919 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2920 av_log(s, AV_LOG_ERROR, "no streams\n");
2921 ret = AVERROR(EINVAL);
2925 for(i=0;i<s->nb_streams;i++) {
2928 switch (st->codec->codec_type) {
2929 case AVMEDIA_TYPE_AUDIO:
2930 if(st->codec->sample_rate<=0){
2931 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2932 ret = AVERROR(EINVAL);
2935 if(!st->codec->block_align)
2936 st->codec->block_align = st->codec->channels *
2937 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2939 case AVMEDIA_TYPE_VIDEO:
2940 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2941 av_log(s, AV_LOG_ERROR, "time base not set\n");
2942 ret = AVERROR(EINVAL);
2945 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2946 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2947 ret = AVERROR(EINVAL);
2950 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2951 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2952 ret = AVERROR(EINVAL);
2958 if(s->oformat->codec_tag){
2959 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)){
2960 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2961 st->codec->codec_tag= 0;
2963 if(st->codec->codec_tag){
2964 if (!validate_codec_tag(s, st)) {
2966 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2967 av_log(s, AV_LOG_ERROR,
2968 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2969 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2970 ret = AVERROR_INVALIDDATA;
2974 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2977 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2978 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2979 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2982 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2983 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2984 if (!s->priv_data) {
2985 ret = AVERROR(ENOMEM);
2988 if (s->oformat->priv_class) {
2989 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2990 av_opt_set_defaults(s->priv_data);
2991 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2996 /* set muxer identification string */
2997 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2998 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3001 if(s->oformat->write_header){
3002 ret = s->oformat->write_header(s);
3007 /* init PTS generation */
3008 for(i=0;i<s->nb_streams;i++) {
3009 int64_t den = AV_NOPTS_VALUE;
3012 switch (st->codec->codec_type) {
3013 case AVMEDIA_TYPE_AUDIO:
3014 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3016 case AVMEDIA_TYPE_VIDEO:
3017 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3022 if (den != AV_NOPTS_VALUE) {
3024 ret = AVERROR_INVALIDDATA;
3027 av_frac_init(&st->pts, 0, 0, den);
3032 av_dict_free(options);
3041 //FIXME merge with compute_pkt_fields
3042 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3043 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3044 int num, den, frame_size, i;
3046 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
3047 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
3049 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
3050 return AVERROR(EINVAL);*/
3052 /* duration field */
3053 if (pkt->duration == 0) {
3054 compute_frame_duration(&num, &den, st, NULL, pkt);
3056 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3060 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3063 //XXX/FIXME this is a temporary hack until all encoders output pts
3064 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3066 // pkt->pts= st->cur_dts;
3067 pkt->pts= st->pts.val;
3070 //calculate dts from pts
3071 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3072 st->pts_buffer[0]= pkt->pts;
3073 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3074 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3075 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3076 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3078 pkt->dts= st->pts_buffer[0];
3081 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)){
3082 av_log(s, AV_LOG_ERROR,
3083 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
3084 st->index, st->cur_dts, pkt->dts);
3085 return AVERROR(EINVAL);
3087 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3088 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3089 return AVERROR(EINVAL);
3092 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3093 st->cur_dts= pkt->dts;
3094 st->pts.val= pkt->dts;
3097 switch (st->codec->codec_type) {
3098 case AVMEDIA_TYPE_AUDIO:
3099 frame_size = get_audio_frame_size(st->codec, pkt->size);
3101 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3102 likely equal to the encoder delay, but it would be better if we
3103 had the real timestamps from the encoder */
3104 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3105 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3108 case AVMEDIA_TYPE_VIDEO:
3109 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3117 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3119 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3121 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3124 ret= s->oformat->write_packet(s, pkt);
3126 ret= url_ferror(s->pb);
3130 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3131 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3133 AVPacketList **next_point, *this_pktl;
3135 this_pktl = av_mallocz(sizeof(AVPacketList));
3136 this_pktl->pkt= *pkt;
3137 pkt->destruct= NULL; // do not free original but only the copy
3138 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3140 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3141 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3143 next_point = &s->packet_buffer;
3146 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3147 while(!compare(s, &(*next_point)->pkt, pkt)){
3148 next_point= &(*next_point)->next;
3152 next_point = &(s->packet_buffer_end->next);
3155 assert(!*next_point);
3157 s->packet_buffer_end= this_pktl;
3160 this_pktl->next= *next_point;
3162 s->streams[pkt->stream_index]->last_in_packet_buffer=
3163 *next_point= this_pktl;
3166 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3168 AVStream *st = s->streams[ pkt ->stream_index];
3169 AVStream *st2= s->streams[ next->stream_index];
3170 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3174 return pkt->stream_index < next->stream_index;
3178 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3184 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3187 for(i=0; i < s->nb_streams; i++)
3188 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3190 if(stream_count && (s->nb_streams == stream_count || flush)){
3191 pktl= s->packet_buffer;
3194 s->packet_buffer= pktl->next;
3195 if(!s->packet_buffer)
3196 s->packet_buffer_end= NULL;
3198 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3199 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3203 av_init_packet(out);
3209 * Interleave an AVPacket correctly so it can be muxed.
3210 * @param out the interleaved packet will be output here
3211 * @param in the input packet
3212 * @param flush 1 if no further packets are available as input and all
3213 * remaining packets should be output
3214 * @return 1 if a packet was output, 0 if no packet could be output,
3215 * < 0 if an error occurred
3217 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3218 if(s->oformat->interleave_packet)
3219 return s->oformat->interleave_packet(s, out, in, flush);
3221 return av_interleave_packet_per_dts(s, out, in, flush);
3224 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3225 AVStream *st= s->streams[ pkt->stream_index];
3228 //FIXME/XXX/HACK drop zero sized packets
3229 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3232 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3233 pkt->size, pkt->dts, pkt->pts);
3234 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3237 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3238 return AVERROR(EINVAL);
3242 int ret= av_interleave_packet(s, &opkt, pkt, 0);
3243 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3246 ret= s->oformat->write_packet(s, &opkt);
3248 av_free_packet(&opkt);
3253 if(url_ferror(s->pb))
3254 return url_ferror(s->pb);
3258 int av_write_trailer(AVFormatContext *s)
3264 ret= av_interleave_packet(s, &pkt, NULL, 1);
3265 if(ret<0) //FIXME cleanup needed for ret<0 ?
3270 ret= s->oformat->write_packet(s, &pkt);
3272 av_free_packet(&pkt);
3276 if(url_ferror(s->pb))
3280 if(s->oformat->write_trailer)
3281 ret = s->oformat->write_trailer(s);
3284 ret=url_ferror(s->pb);
3285 for(i=0;i<s->nb_streams;i++) {
3286 av_freep(&s->streams[i]->priv_data);
3287 av_freep(&s->streams[i]->index_entries);
3289 if (s->iformat && s->iformat->priv_class)
3290 av_opt_free(s->priv_data);
3291 av_freep(&s->priv_data);
3295 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3296 int64_t *dts, int64_t *wall)
3298 if (!s->oformat || !s->oformat->get_output_timestamp)
3299 return AVERROR(ENOSYS);
3300 s->oformat->get_output_timestamp(s, stream, dts, wall);
3304 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3307 AVProgram *program=NULL;
3310 if (idx >= ac->nb_streams) {
3311 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3315 for(i=0; i<ac->nb_programs; i++){
3316 if(ac->programs[i]->id != progid)
3318 program = ac->programs[i];
3319 for(j=0; j<program->nb_stream_indexes; j++)
3320 if(program->stream_index[j] == idx)
3323 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3326 program->stream_index = tmp;
3327 program->stream_index[program->nb_stream_indexes++] = idx;
3332 static void print_fps(double d, const char *postfix){
3333 uint64_t v= lrintf(d*100);
3334 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3335 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3336 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3339 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3341 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3342 AVDictionaryEntry *tag=NULL;
3344 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3345 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3346 if(strcmp("language", tag->key)){
3349 av_strlcpy(tmp, tag->value, sizeof(tmp));
3350 for(i=0; i<strlen(tmp); i++) if(tmp[i]==0xd) tmp[i]=' ';
3351 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tmp);
3357 /* "user interface" functions */
3358 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3361 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3362 AVStream *st = ic->streams[i];
3363 int g = av_gcd(st->time_base.num, st->time_base.den);
3364 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3365 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3366 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3367 /* the pid is an important information, so we display it */
3368 /* XXX: add a generic system */
3369 if (flags & AVFMT_SHOW_IDS)
3370 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3372 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3373 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3374 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3375 if (st->sample_aspect_ratio.num && // default
3376 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3377 AVRational display_aspect_ratio;
3378 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3379 st->codec->width*st->sample_aspect_ratio.num,
3380 st->codec->height*st->sample_aspect_ratio.den,
3382 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3383 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3384 display_aspect_ratio.num, display_aspect_ratio.den);
3386 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3387 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3388 print_fps(av_q2d(st->avg_frame_rate), "fps");
3389 if(st->r_frame_rate.den && st->r_frame_rate.num)
3390 print_fps(av_q2d(st->r_frame_rate), "tbr");
3391 if(st->time_base.den && st->time_base.num)
3392 print_fps(1/av_q2d(st->time_base), "tbn");
3393 if(st->codec->time_base.den && st->codec->time_base.num)
3394 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3396 if (st->disposition & AV_DISPOSITION_DEFAULT)
3397 av_log(NULL, AV_LOG_INFO, " (default)");
3398 if (st->disposition & AV_DISPOSITION_DUB)
3399 av_log(NULL, AV_LOG_INFO, " (dub)");
3400 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3401 av_log(NULL, AV_LOG_INFO, " (original)");
3402 if (st->disposition & AV_DISPOSITION_COMMENT)
3403 av_log(NULL, AV_LOG_INFO, " (comment)");
3404 if (st->disposition & AV_DISPOSITION_LYRICS)
3405 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3406 if (st->disposition & AV_DISPOSITION_KARAOKE)
3407 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3408 if (st->disposition & AV_DISPOSITION_FORCED)
3409 av_log(NULL, AV_LOG_INFO, " (forced)");
3410 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3411 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3412 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3413 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3414 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3415 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3416 av_log(NULL, AV_LOG_INFO, "\n");
3417 dump_metadata(NULL, st->metadata, " ");
3420 #if FF_API_DUMP_FORMAT
3421 void dump_format(AVFormatContext *ic,
3426 av_dump_format(ic, index, url, is_output);
3430 void av_dump_format(AVFormatContext *ic,
3436 uint8_t *printed = av_mallocz(ic->nb_streams);
3437 if (ic->nb_streams && !printed)
3440 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3441 is_output ? "Output" : "Input",
3443 is_output ? ic->oformat->name : ic->iformat->name,
3444 is_output ? "to" : "from", url);
3445 dump_metadata(NULL, ic->metadata, " ");
3447 av_log(NULL, AV_LOG_INFO, " Duration: ");
3448 if (ic->duration != AV_NOPTS_VALUE) {
3449 int hours, mins, secs, us;
3450 secs = ic->duration / AV_TIME_BASE;
3451 us = ic->duration % AV_TIME_BASE;
3456 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3457 (100 * us) / AV_TIME_BASE);
3459 av_log(NULL, AV_LOG_INFO, "N/A");
3461 if (ic->start_time != AV_NOPTS_VALUE) {
3463 av_log(NULL, AV_LOG_INFO, ", start: ");
3464 secs = ic->start_time / AV_TIME_BASE;
3465 us = abs(ic->start_time % AV_TIME_BASE);
3466 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3467 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3469 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3471 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3473 av_log(NULL, AV_LOG_INFO, "N/A");
3475 av_log(NULL, AV_LOG_INFO, "\n");
3477 for (i = 0; i < ic->nb_chapters; i++) {
3478 AVChapter *ch = ic->chapters[i];
3479 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3480 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3481 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3483 dump_metadata(NULL, ch->metadata, " ");
3485 if(ic->nb_programs) {
3486 int j, k, total = 0;
3487 for(j=0; j<ic->nb_programs; j++) {
3488 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3490 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3491 name ? name->value : "");
3492 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3493 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3494 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3495 printed[ic->programs[j]->stream_index[k]] = 1;
3497 total += ic->programs[j]->nb_stream_indexes;
3499 if (total < ic->nb_streams)
3500 av_log(NULL, AV_LOG_INFO, " No Program\n");
3502 for(i=0;i<ic->nb_streams;i++)
3504 dump_stream_format(ic, i, index, is_output);
3509 int64_t av_gettime(void)
3512 gettimeofday(&tv,NULL);
3513 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3516 uint64_t ff_ntp_time(void)
3518 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3521 #if FF_API_PARSE_DATE
3522 #include "libavutil/parseutils.h"
3524 int64_t parse_date(const char *timestr, int duration)
3527 av_parse_time(&timeval, timestr, duration);
3532 #if FF_API_FIND_INFO_TAG
3533 #include "libavutil/parseutils.h"
3535 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3537 return av_find_info_tag(arg, arg_size, tag1, info);
3541 int av_get_frame_filename(char *buf, int buf_size,
3542 const char *path, int number)
3545 char *q, buf1[20], c;
3546 int nd, len, percentd_found;
3558 while (isdigit(*p)) {
3559 nd = nd * 10 + *p++ - '0';
3562 } while (isdigit(c));
3571 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3573 if ((q - buf + len) > buf_size - 1)
3575 memcpy(q, buf1, len);
3583 if ((q - buf) < buf_size - 1)
3587 if (!percentd_found)
3596 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3600 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3602 for(i=0;i<size;i+=16) {
3609 PRINT(" %02x", buf[i+j]);
3614 for(j=0;j<len;j++) {
3616 if (c < ' ' || c > '~')
3625 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3627 hex_dump_internal(NULL, f, 0, buf, size);
3630 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3632 hex_dump_internal(avcl, NULL, level, buf, size);
3635 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3638 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3639 PRINT("stream #%d:\n", pkt->stream_index);
3640 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3641 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3642 /* DTS is _always_ valid after av_read_frame() */
3644 if (pkt->dts == AV_NOPTS_VALUE)
3647 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3648 /* PTS may not be known if B-frames are present. */
3650 if (pkt->pts == AV_NOPTS_VALUE)
3653 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3655 PRINT(" size=%d\n", pkt->size);
3658 av_hex_dump(f, pkt->data, pkt->size);
3662 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3664 AVRational tb = { 1, AV_TIME_BASE };
3665 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3669 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3671 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3675 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3677 AVRational tb = { 1, AV_TIME_BASE };
3678 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3682 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3685 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3688 void av_url_split(char *proto, int proto_size,
3689 char *authorization, int authorization_size,
3690 char *hostname, int hostname_size,
3692 char *path, int path_size,
3695 const char *p, *ls, *at, *col, *brk;
3697 if (port_ptr) *port_ptr = -1;
3698 if (proto_size > 0) proto[0] = 0;
3699 if (authorization_size > 0) authorization[0] = 0;
3700 if (hostname_size > 0) hostname[0] = 0;
3701 if (path_size > 0) path[0] = 0;
3703 /* parse protocol */
3704 if ((p = strchr(url, ':'))) {
3705 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3710 /* no protocol means plain filename */
3711 av_strlcpy(path, url, path_size);
3715 /* separate path from hostname */
3716 ls = strchr(p, '/');
3718 ls = strchr(p, '?');
3720 av_strlcpy(path, ls, path_size);
3722 ls = &p[strlen(p)]; // XXX
3724 /* the rest is hostname, use that to parse auth/port */
3726 /* authorization (user[:pass]@hostname) */
3727 if ((at = strchr(p, '@')) && at < ls) {
3728 av_strlcpy(authorization, p,
3729 FFMIN(authorization_size, at + 1 - p));
3730 p = at + 1; /* skip '@' */
3733 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3735 av_strlcpy(hostname, p + 1,
3736 FFMIN(hostname_size, brk - p));
3737 if (brk[1] == ':' && port_ptr)
3738 *port_ptr = atoi(brk + 2);
3739 } else if ((col = strchr(p, ':')) && col < ls) {
3740 av_strlcpy(hostname, p,
3741 FFMIN(col + 1 - p, hostname_size));
3742 if (port_ptr) *port_ptr = atoi(col + 1);
3744 av_strlcpy(hostname, p,
3745 FFMIN(ls + 1 - p, hostname_size));
3749 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3752 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3755 'C', 'D', 'E', 'F' };
3756 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3759 'c', 'd', 'e', 'f' };
3760 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3762 for(i = 0; i < s; i++) {
3763 buff[i * 2] = hex_table[src[i] >> 4];
3764 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3770 int ff_hex_to_data(uint8_t *data, const char *p)
3777 p += strspn(p, SPACE_CHARS);
3780 c = toupper((unsigned char) *p++);
3781 if (c >= '0' && c <= '9')
3783 else if (c >= 'A' && c <= 'F')
3798 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3799 unsigned int pts_num, unsigned int pts_den)
3802 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3803 if(new_tb.num != pts_num)
3804 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3806 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3808 if(new_tb.num <= 0 || new_tb.den <= 0) {
3809 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3812 s->time_base = new_tb;
3813 s->pts_wrap_bits = pts_wrap_bits;
3816 int ff_url_join(char *str, int size, const char *proto,
3817 const char *authorization, const char *hostname,
3818 int port, const char *fmt, ...)
3821 struct addrinfo hints, *ai;
3826 av_strlcatf(str, size, "%s://", proto);
3827 if (authorization && authorization[0])
3828 av_strlcatf(str, size, "%s@", authorization);
3829 #if CONFIG_NETWORK && defined(AF_INET6)
3830 /* Determine if hostname is a numerical IPv6 address,
3831 * properly escape it within [] in that case. */
3832 memset(&hints, 0, sizeof(hints));
3833 hints.ai_flags = AI_NUMERICHOST;
3834 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3835 if (ai->ai_family == AF_INET6) {
3836 av_strlcat(str, "[", size);
3837 av_strlcat(str, hostname, size);
3838 av_strlcat(str, "]", size);
3840 av_strlcat(str, hostname, size);
3845 /* Not an IPv6 address, just output the plain string. */
3846 av_strlcat(str, hostname, size);
3849 av_strlcatf(str, size, ":%d", port);
3852 int len = strlen(str);
3855 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3861 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3862 AVFormatContext *src)
3867 local_pkt.stream_index = dst_stream;
3868 if (pkt->pts != AV_NOPTS_VALUE)
3869 local_pkt.pts = av_rescale_q(pkt->pts,
3870 src->streams[pkt->stream_index]->time_base,
3871 dst->streams[dst_stream]->time_base);
3872 if (pkt->dts != AV_NOPTS_VALUE)
3873 local_pkt.dts = av_rescale_q(pkt->dts,
3874 src->streams[pkt->stream_index]->time_base,
3875 dst->streams[dst_stream]->time_base);
3876 return av_write_frame(dst, &local_pkt);
3879 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3882 const char *ptr = str;
3884 /* Parse key=value pairs. */
3887 char *dest = NULL, *dest_end;
3888 int key_len, dest_len = 0;
3890 /* Skip whitespace and potential commas. */
3891 while (*ptr && (isspace(*ptr) || *ptr == ','))
3898 if (!(ptr = strchr(key, '=')))
3901 key_len = ptr - key;
3903 callback_get_buf(context, key, key_len, &dest, &dest_len);
3904 dest_end = dest + dest_len - 1;
3908 while (*ptr && *ptr != '\"') {
3912 if (dest && dest < dest_end)
3916 if (dest && dest < dest_end)
3924 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3925 if (dest && dest < dest_end)
3933 int ff_find_stream_index(AVFormatContext *s, int id)
3936 for (i = 0; i < s->nb_streams; i++) {
3937 if (s->streams[i]->id == id)
3943 void ff_make_absolute_url(char *buf, int size, const char *base,
3947 /* Absolute path, relative to the current server */
3948 if (base && strstr(base, "://") && rel[0] == '/') {
3950 av_strlcpy(buf, base, size);
3951 sep = strstr(buf, "://");
3954 sep = strchr(sep, '/');
3958 av_strlcat(buf, rel, size);
3961 /* If rel actually is an absolute url, just copy it */
3962 if (!base || strstr(rel, "://") || rel[0] == '/') {
3963 av_strlcpy(buf, rel, size);
3967 av_strlcpy(buf, base, size);
3968 /* Remove the file name from the base url */
3969 sep = strrchr(buf, '/');
3974 while (av_strstart(rel, "../", NULL) && sep) {
3975 /* Remove the path delimiter at the end */
3977 sep = strrchr(buf, '/');
3978 /* If the next directory name to pop off is "..", break here */
3979 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3980 /* Readd the slash we just removed */
3981 av_strlcat(buf, "/", size);
3984 /* Cut off the directory name */
3991 av_strlcat(buf, rel, size);