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 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 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 { "loas" , CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO },
373 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
374 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
375 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
379 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
383 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
384 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
385 for (i = 0; fmt_id_type[i].name; i++) {
386 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
387 st->codec->codec_id = fmt_id_type[i].id;
388 st->codec->codec_type = fmt_id_type[i].type;
396 /************************************************************/
397 /* input media file */
399 #if FF_API_FORMAT_PARAMETERS
400 static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
403 AVDictionary *opts = NULL;
408 if (ap->time_base.num) {
409 snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
410 av_dict_set(&opts, "framerate", buf, 0);
412 if (ap->sample_rate) {
413 snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
414 av_dict_set(&opts, "sample_rate", buf, 0);
417 snprintf(buf, sizeof(buf), "%d", ap->channels);
418 av_dict_set(&opts, "channels", buf, 0);
420 if (ap->width || ap->height) {
421 snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
422 av_dict_set(&opts, "video_size", buf, 0);
424 if (ap->pix_fmt != PIX_FMT_NONE) {
425 av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
428 snprintf(buf, sizeof(buf), "%d", ap->channel);
429 av_dict_set(&opts, "channel", buf, 0);
432 av_dict_set(&opts, "standard", ap->standard, 0);
434 if (ap->mpeg2ts_compute_pcr) {
435 av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
437 if (ap->initial_pause) {
438 av_dict_set(&opts, "initial_pause", "1", 0);
444 * Open a media file from an IO stream. 'fmt' must be specified.
446 int av_open_input_stream(AVFormatContext **ic_ptr,
447 AVIOContext *pb, const char *filename,
448 AVInputFormat *fmt, AVFormatParameters *ap)
453 AVFormatParameters default_ap;
457 memset(ap, 0, sizeof(default_ap));
459 opts = convert_format_parameters(ap);
461 if(!ap->prealloced_context)
462 *ic_ptr = ic = avformat_alloc_context();
466 err = AVERROR(ENOMEM);
469 if (pb && fmt && fmt->flags & AVFMT_NOFILE)
470 av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
471 "will be ignored with AVFMT_NOFILE format.\n");
475 if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0)
477 ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above
486 int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap){
489 if (ic->iformat->read_header) {
490 err = ic->iformat->read_header(ic, ap);
495 if (ic->pb && !ic->data_offset)
496 ic->data_offset = avio_tell(ic->pb);
502 /** size of probe buffer, for guessing file type from file contents */
503 #define PROBE_BUF_MIN 2048
504 #define PROBE_BUF_MAX (1<<20)
506 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
507 const char *filename, void *logctx,
508 unsigned int offset, unsigned int max_probe_size)
510 AVProbeData pd = { filename ? filename : "", NULL, -offset };
511 unsigned char *buf = NULL;
512 int ret = 0, probe_size;
514 if (!max_probe_size) {
515 max_probe_size = PROBE_BUF_MAX;
516 } else if (max_probe_size > PROBE_BUF_MAX) {
517 max_probe_size = PROBE_BUF_MAX;
518 } else if (max_probe_size < PROBE_BUF_MIN) {
519 return AVERROR(EINVAL);
522 if (offset >= max_probe_size) {
523 return AVERROR(EINVAL);
526 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
527 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
528 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
529 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
532 if (probe_size < offset) {
536 /* read probe data */
537 buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
540 return AVERROR(ENOMEM);
543 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
544 /* fail if error was not end of file, otherwise, lower score */
545 if (ret != AVERROR_EOF) {
550 ret = 0; /* error was end of file, nothing read */
553 pd.buf = &buf[offset];
555 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
557 /* guess file format */
558 *fmt = av_probe_input_format2(&pd, 1, &score);
560 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
561 av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score);
563 av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score);
569 return AVERROR_INVALIDDATA;
572 /* rewind. reuse probe buffer to avoid seeking */
573 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
579 #if FF_API_FORMAT_PARAMETERS
580 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
583 AVFormatParameters *ap)
586 AVDictionary *opts = convert_format_parameters(ap);
588 if (!ap || !ap->prealloced_context)
591 err = avformat_open_input(ic_ptr, filename, fmt, &opts);
598 /* open input file and probe the format if necessary */
599 static int init_input(AVFormatContext *s, const char *filename)
602 AVProbeData pd = {filename, NULL, 0};
605 s->flags |= AVFMT_FLAG_CUSTOM_IO;
607 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
608 else if (s->iformat->flags & AVFMT_NOFILE)
609 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
610 "will be ignored with AVFMT_NOFILE format.\n");
614 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
615 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
618 if ((ret = avio_open(&s->pb, filename, AVIO_FLAG_READ)) < 0)
622 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
625 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
627 AVFormatContext *s = *ps;
629 AVFormatParameters ap = { { 0 } };
630 AVDictionary *tmp = NULL;
632 if (!s && !(s = avformat_alloc_context()))
633 return AVERROR(ENOMEM);
638 av_dict_copy(&tmp, *options, 0);
640 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
643 if ((ret = init_input(s, filename)) < 0)
646 /* check filename in case an image number is expected */
647 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
648 if (!av_filename_number_test(filename)) {
649 ret = AVERROR(EINVAL);
654 s->duration = s->start_time = AV_NOPTS_VALUE;
655 av_strlcpy(s->filename, filename, sizeof(s->filename));
657 /* allocate private data */
658 if (s->iformat->priv_data_size > 0) {
659 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
660 ret = AVERROR(ENOMEM);
663 if (s->iformat->priv_class) {
664 *(const AVClass**)s->priv_data = s->iformat->priv_class;
665 av_opt_set_defaults(s->priv_data);
666 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
671 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
673 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
675 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
676 if ((ret = s->iformat->read_header(s, &ap)) < 0)
679 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset)
680 s->data_offset = avio_tell(s->pb);
682 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
685 av_dict_free(options);
693 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
695 avformat_free_context(s);
700 /*******************************************************/
702 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
703 AVPacketList **plast_pktl){
704 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
709 (*plast_pktl)->next = pktl;
711 *packet_buffer = pktl;
713 /* add the packet in the buffered packet list */
719 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
725 AVPacketList *pktl = s->raw_packet_buffer;
729 if(s->streams[pkt->stream_index]->request_probe <= 0){
730 s->raw_packet_buffer = pktl->next;
731 s->raw_packet_buffer_remaining_size += pkt->size;
738 ret= s->iformat->read_packet(s, pkt);
740 if (!pktl || ret == AVERROR(EAGAIN))
742 for (i = 0; i < s->nb_streams; i++)
743 if(s->streams[i]->request_probe > 0)
744 s->streams[i]->request_probe = -1;
748 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
749 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
750 av_log(s, AV_LOG_WARNING,
751 "Dropped corrupted packet (stream = %d)\n",
756 if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
757 av_packet_merge_side_data(pkt);
759 st= s->streams[pkt->stream_index];
761 switch(st->codec->codec_type){
762 case AVMEDIA_TYPE_VIDEO:
763 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
765 case AVMEDIA_TYPE_AUDIO:
766 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
768 case AVMEDIA_TYPE_SUBTITLE:
769 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
773 if(!pktl && st->request_probe <= 0)
776 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
777 s->raw_packet_buffer_remaining_size -= pkt->size;
779 if(st->request_probe>0){
780 AVProbeData *pd = &st->probe_data;
782 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
785 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
786 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
787 pd->buf_size += pkt->size;
788 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
790 end= s->raw_packet_buffer_remaining_size <= 0
791 || st->probe_packets<=0;
793 if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
794 int score= set_codec_from_probe_data(s, st, pd);
795 if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4)
799 st->request_probe= -1;
800 if(st->codec->codec_id != CODEC_ID_NONE){
801 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
803 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
810 /**********************************************************/
813 * Get the number of samples of an audio frame. Return -1 on error.
815 static int get_audio_frame_size(AVCodecContext *enc, int size)
819 if(enc->codec_id == CODEC_ID_VORBIS)
822 if (enc->frame_size <= 1) {
823 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
825 if (bits_per_sample) {
826 if (enc->channels == 0)
828 frame_size = (size << 3) / (bits_per_sample * enc->channels);
830 /* used for example by ADPCM codecs */
831 if (enc->bit_rate == 0)
833 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
836 frame_size = enc->frame_size;
843 * Return the frame duration in seconds. Return 0 if not available.
845 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
846 AVCodecParserContext *pc, AVPacket *pkt)
852 switch(st->codec->codec_type) {
853 case AVMEDIA_TYPE_VIDEO:
854 if(st->time_base.num*1000LL > st->time_base.den){
855 *pnum = st->time_base.num;
856 *pden = st->time_base.den;
857 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
858 *pnum = st->codec->time_base.num;
859 *pden = st->codec->time_base.den;
860 if (pc && pc->repeat_pict) {
861 *pnum = (*pnum) * (1 + pc->repeat_pict);
863 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
864 //Thus if we have no parser in such case leave duration undefined.
865 if(st->codec->ticks_per_frame>1 && !pc){
870 case AVMEDIA_TYPE_AUDIO:
871 frame_size = get_audio_frame_size(st->codec, pkt->size);
872 if (frame_size <= 0 || st->codec->sample_rate <= 0)
875 *pden = st->codec->sample_rate;
882 static int is_intra_only(AVCodecContext *enc){
883 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
885 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
886 switch(enc->codec_id){
888 case CODEC_ID_MJPEGB:
890 case CODEC_ID_RAWVIDEO:
891 case CODEC_ID_DVVIDEO:
892 case CODEC_ID_HUFFYUV:
893 case CODEC_ID_FFVHUFF:
898 case CODEC_ID_JPEG2000:
906 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
907 int64_t dts, int64_t pts)
909 AVStream *st= s->streams[stream_index];
910 AVPacketList *pktl= s->packet_buffer;
912 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
915 st->first_dts= dts - st->cur_dts;
918 for(; pktl; pktl= pktl->next){
919 if(pktl->pkt.stream_index != stream_index)
921 //FIXME think more about this check
922 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
923 pktl->pkt.pts += st->first_dts;
925 if(pktl->pkt.dts != AV_NOPTS_VALUE)
926 pktl->pkt.dts += st->first_dts;
928 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
929 st->start_time= pktl->pkt.pts;
931 if (st->start_time == AV_NOPTS_VALUE)
932 st->start_time = pts;
935 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
937 AVPacketList *pktl= s->packet_buffer;
940 if(st->first_dts != AV_NOPTS_VALUE){
941 cur_dts= st->first_dts;
942 for(; pktl; pktl= pktl->next){
943 if(pktl->pkt.stream_index == pkt->stream_index){
944 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
946 cur_dts -= pkt->duration;
949 pktl= s->packet_buffer;
950 st->first_dts = cur_dts;
951 }else if(st->cur_dts)
954 for(; pktl; pktl= pktl->next){
955 if(pktl->pkt.stream_index != pkt->stream_index)
957 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
958 && !pktl->pkt.duration){
959 pktl->pkt.dts= cur_dts;
960 if(!st->codec->has_b_frames)
961 pktl->pkt.pts= cur_dts;
962 cur_dts += pkt->duration;
963 pktl->pkt.duration= pkt->duration;
967 if(st->first_dts == AV_NOPTS_VALUE)
968 st->cur_dts= cur_dts;
971 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
972 AVCodecParserContext *pc, AVPacket *pkt)
974 int num, den, presentation_delayed, delay, i;
977 if (s->flags & AVFMT_FLAG_NOFILLIN)
980 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
981 pkt->dts= AV_NOPTS_VALUE;
983 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
984 //FIXME Set low_delay = 0 when has_b_frames = 1
985 st->codec->has_b_frames = 1;
987 /* do we have a video B-frame ? */
988 delay= st->codec->has_b_frames;
989 presentation_delayed = 0;
991 // ignore delay caused by frame threading so that the mpeg2-without-dts
992 // warning will not trigger
993 if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
994 delay -= st->codec->thread_count-1;
996 /* XXX: need has_b_frame, but cannot get it if the codec is
999 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1000 presentation_delayed = 1;
1002 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
1003 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
1004 pkt->dts -= 1LL<<st->pts_wrap_bits;
1007 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
1008 // we take the conservative approach and discard both
1009 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
1010 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
1011 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
1012 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
1015 if (pkt->duration == 0) {
1016 compute_frame_duration(&num, &den, st, pc, pkt);
1018 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
1020 if(pkt->duration != 0 && s->packet_buffer)
1021 update_initial_durations(s, st, pkt);
1025 /* correct timestamps with byte offset if demuxers only have timestamps
1026 on packet boundaries */
1027 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
1028 /* this will estimate bitrate based on this frame's duration and size */
1029 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1030 if(pkt->pts != AV_NOPTS_VALUE)
1032 if(pkt->dts != AV_NOPTS_VALUE)
1036 if (pc && pc->dts_sync_point >= 0) {
1037 // we have synchronization info from the parser
1038 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1040 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1041 if (pkt->dts != AV_NOPTS_VALUE) {
1042 // got DTS from the stream, update reference timestamp
1043 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1044 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1045 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1046 // compute DTS based on reference timestamp
1047 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1048 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1050 if (pc->dts_sync_point > 0)
1051 st->reference_dts = pkt->dts; // new reference
1055 /* This may be redundant, but it should not hurt. */
1056 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1057 presentation_delayed = 1;
1059 // 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);
1060 /* interpolate PTS and DTS if they are not present */
1061 //We skip H264 currently because delay and has_b_frames are not reliably set
1062 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1063 if (presentation_delayed) {
1064 /* DTS = decompression timestamp */
1065 /* PTS = presentation timestamp */
1066 if (pkt->dts == AV_NOPTS_VALUE)
1067 pkt->dts = st->last_IP_pts;
1068 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1069 if (pkt->dts == AV_NOPTS_VALUE)
1070 pkt->dts = st->cur_dts;
1072 /* this is tricky: the dts must be incremented by the duration
1073 of the frame we are displaying, i.e. the last I- or P-frame */
1074 if (st->last_IP_duration == 0)
1075 st->last_IP_duration = pkt->duration;
1076 if(pkt->dts != AV_NOPTS_VALUE)
1077 st->cur_dts = pkt->dts + st->last_IP_duration;
1078 st->last_IP_duration = pkt->duration;
1079 st->last_IP_pts= pkt->pts;
1080 /* cannot compute PTS if not present (we can compute it only
1081 by knowing the future */
1082 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1083 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1084 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1085 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1086 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1087 pkt->pts += pkt->duration;
1088 // 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);
1092 /* presentation is not delayed : PTS and DTS are the same */
1093 if(pkt->pts == AV_NOPTS_VALUE)
1094 pkt->pts = pkt->dts;
1095 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1096 if(pkt->pts == AV_NOPTS_VALUE)
1097 pkt->pts = st->cur_dts;
1098 pkt->dts = pkt->pts;
1099 if(pkt->pts != AV_NOPTS_VALUE)
1100 st->cur_dts = pkt->pts + pkt->duration;
1104 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1105 st->pts_buffer[0]= pkt->pts;
1106 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1107 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1108 if(pkt->dts == AV_NOPTS_VALUE)
1109 pkt->dts= st->pts_buffer[0];
1110 if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1111 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1113 if(pkt->dts > st->cur_dts)
1114 st->cur_dts = pkt->dts;
1117 // 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);
1120 if(is_intra_only(st->codec))
1121 pkt->flags |= AV_PKT_FLAG_KEY;
1124 /* keyframe computation */
1125 if (pc->key_frame == 1)
1126 pkt->flags |= AV_PKT_FLAG_KEY;
1127 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
1128 pkt->flags |= AV_PKT_FLAG_KEY;
1131 pkt->convergence_duration = pc->convergence_duration;
1135 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1140 av_init_packet(pkt);
1143 /* select current input stream component */
1146 if (!st->need_parsing || !st->parser) {
1147 /* no parsing needed: we just output the packet as is */
1148 /* raw data support */
1149 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1150 compute_pkt_fields(s, st, NULL, pkt);
1152 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1153 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1154 ff_reduce_index(s, st->index);
1155 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1158 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1159 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1160 st->cur_ptr, st->cur_len,
1161 st->cur_pkt.pts, st->cur_pkt.dts,
1163 st->cur_pkt.pts = AV_NOPTS_VALUE;
1164 st->cur_pkt.dts = AV_NOPTS_VALUE;
1165 /* increment read pointer */
1169 /* return packet if any */
1173 pkt->stream_index = st->index;
1174 pkt->pts = st->parser->pts;
1175 pkt->dts = st->parser->dts;
1176 pkt->pos = st->parser->pos;
1177 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1179 pkt->destruct= st->cur_pkt.destruct;
1180 st->cur_pkt.destruct= NULL;
1181 st->cur_pkt.data = NULL;
1182 assert(st->cur_len == 0);
1184 pkt->destruct = NULL;
1186 compute_pkt_fields(s, st, st->parser, pkt);
1188 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1189 int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset;
1190 ff_reduce_index(s, st->index);
1191 av_add_index_entry(st, pos, pkt->dts,
1192 0, 0, AVINDEX_KEYFRAME);
1199 av_free_packet(&st->cur_pkt);
1204 /* read next packet */
1205 ret = av_read_packet(s, &cur_pkt);
1207 if (ret == AVERROR(EAGAIN))
1209 /* return the last frames, if any */
1210 for(i = 0; i < s->nb_streams; i++) {
1212 if (st->parser && st->need_parsing) {
1213 av_parser_parse2(st->parser, st->codec,
1214 &pkt->data, &pkt->size,
1216 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1222 /* no more packets: really terminate parsing */
1225 st = s->streams[cur_pkt.stream_index];
1226 st->cur_pkt= cur_pkt;
1228 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1229 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1230 st->cur_pkt.pts < st->cur_pkt.dts){
1231 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1232 st->cur_pkt.stream_index,
1236 // av_free_packet(&st->cur_pkt);
1240 if(s->debug & FF_FDEBUG_TS)
1241 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1242 st->cur_pkt.stream_index,
1246 st->cur_pkt.duration,
1250 st->cur_ptr = st->cur_pkt.data;
1251 st->cur_len = st->cur_pkt.size;
1252 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1253 st->parser = av_parser_init(st->codec->codec_id);
1255 av_log(s, AV_LOG_WARNING, "parser not found for codec "
1256 "%s, packets or times may be invalid.\n",
1257 avcodec_get_name(st->codec->codec_id));
1258 /* no parser available: just output the raw packets */
1259 st->need_parsing = AVSTREAM_PARSE_NONE;
1260 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1261 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1262 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1263 st->parser->flags |= PARSER_FLAG_ONCE;
1268 if(s->debug & FF_FDEBUG_TS)
1269 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1280 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1284 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1287 pktl = s->packet_buffer;
1289 AVPacket *next_pkt= &pktl->pkt;
1291 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1292 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1293 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1294 if( pktl->pkt.stream_index == next_pkt->stream_index
1295 && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1296 && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1297 next_pkt->pts= pktl->pkt.dts;
1301 pktl = s->packet_buffer;
1304 if( next_pkt->pts != AV_NOPTS_VALUE
1305 || next_pkt->dts == AV_NOPTS_VALUE
1307 /* read packet from packet buffer, if there is data */
1309 s->packet_buffer = pktl->next;
1315 int ret= read_frame_internal(s, pkt);
1317 if(pktl && ret != AVERROR(EAGAIN)){
1324 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1325 &s->packet_buffer_end)) < 0)
1326 return AVERROR(ENOMEM);
1328 assert(!s->packet_buffer);
1329 return read_frame_internal(s, pkt);
1334 /* XXX: suppress the packet queue */
1335 static void flush_packet_queue(AVFormatContext *s)
1340 pktl = s->packet_buffer;
1343 s->packet_buffer = pktl->next;
1344 av_free_packet(&pktl->pkt);
1347 while(s->raw_packet_buffer){
1348 pktl = s->raw_packet_buffer;
1349 s->raw_packet_buffer = pktl->next;
1350 av_free_packet(&pktl->pkt);
1353 s->packet_buffer_end=
1354 s->raw_packet_buffer_end= NULL;
1355 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1358 /*******************************************************/
1361 int av_find_default_stream_index(AVFormatContext *s)
1363 int first_audio_index = -1;
1367 if (s->nb_streams <= 0)
1369 for(i = 0; i < s->nb_streams; i++) {
1371 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1374 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1375 first_audio_index = i;
1377 return first_audio_index >= 0 ? first_audio_index : 0;
1381 * Flush the frame reader.
1383 void ff_read_frame_flush(AVFormatContext *s)
1388 flush_packet_queue(s);
1392 /* for each stream, reset read state */
1393 for(i = 0; i < s->nb_streams; i++) {
1397 av_parser_close(st->parser);
1399 av_free_packet(&st->cur_pkt);
1401 st->last_IP_pts = AV_NOPTS_VALUE;
1402 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1403 st->reference_dts = AV_NOPTS_VALUE;
1408 st->probe_packets = MAX_PROBE_PACKETS;
1410 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1411 st->pts_buffer[j]= AV_NOPTS_VALUE;
1415 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1418 for(i = 0; i < s->nb_streams; i++) {
1419 AVStream *st = s->streams[i];
1421 st->cur_dts = av_rescale(timestamp,
1422 st->time_base.den * (int64_t)ref_st->time_base.num,
1423 st->time_base.num * (int64_t)ref_st->time_base.den);
1427 void ff_reduce_index(AVFormatContext *s, int stream_index)
1429 AVStream *st= s->streams[stream_index];
1430 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1432 if((unsigned)st->nb_index_entries >= max_entries){
1434 for(i=0; 2*i<st->nb_index_entries; i++)
1435 st->index_entries[i]= st->index_entries[2*i];
1436 st->nb_index_entries= i;
1440 int ff_add_index_entry(AVIndexEntry **index_entries,
1441 int *nb_index_entries,
1442 unsigned int *index_entries_allocated_size,
1443 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1445 AVIndexEntry *entries, *ie;
1448 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1451 entries = av_fast_realloc(*index_entries,
1452 index_entries_allocated_size,
1453 (*nb_index_entries + 1) *
1454 sizeof(AVIndexEntry));
1458 *index_entries= entries;
1460 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1463 index= (*nb_index_entries)++;
1464 ie= &entries[index];
1465 assert(index==0 || ie[-1].timestamp < timestamp);
1467 ie= &entries[index];
1468 if(ie->timestamp != timestamp){
1469 if(ie->timestamp <= timestamp)
1471 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1472 (*nb_index_entries)++;
1473 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1474 distance= ie->min_distance;
1478 ie->timestamp = timestamp;
1479 ie->min_distance= distance;
1486 int av_add_index_entry(AVStream *st,
1487 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1489 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1490 &st->index_entries_allocated_size, pos,
1491 timestamp, size, distance, flags);
1494 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1495 int64_t wanted_timestamp, int flags)
1503 //optimize appending index entries at the end
1504 if(b && entries[b-1].timestamp < wanted_timestamp)
1509 timestamp = entries[m].timestamp;
1510 if(timestamp >= wanted_timestamp)
1512 if(timestamp <= wanted_timestamp)
1515 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1517 if(!(flags & AVSEEK_FLAG_ANY)){
1518 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1519 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1528 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1531 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1532 wanted_timestamp, flags);
1535 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1536 AVInputFormat *avif= s->iformat;
1537 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1538 int64_t ts_min, ts_max, ts;
1543 if (stream_index < 0)
1546 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1549 ts_min= AV_NOPTS_VALUE;
1550 pos_limit= -1; //gcc falsely says it may be uninitialized
1552 st= s->streams[stream_index];
1553 if(st->index_entries){
1556 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()
1557 index= FFMAX(index, 0);
1558 e= &st->index_entries[index];
1560 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1562 ts_min= e->timestamp;
1563 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1569 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1570 assert(index < st->nb_index_entries);
1572 e= &st->index_entries[index];
1573 assert(e->timestamp >= target_ts);
1575 ts_max= e->timestamp;
1576 pos_limit= pos_max - e->min_distance;
1577 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1578 pos_max,pos_limit, ts_max);
1582 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1587 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1590 av_update_cur_dts(s, st, ts);
1595 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 )){
1597 int64_t start_pos, filesize;
1600 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1602 if(ts_min == AV_NOPTS_VALUE){
1603 pos_min = s->data_offset;
1604 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1605 if (ts_min == AV_NOPTS_VALUE)
1609 if(ts_max == AV_NOPTS_VALUE){
1611 filesize = avio_size(s->pb);
1612 pos_max = filesize - 1;
1615 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1617 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1618 if (ts_max == AV_NOPTS_VALUE)
1622 int64_t tmp_pos= pos_max + 1;
1623 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1624 if(tmp_ts == AV_NOPTS_VALUE)
1628 if(tmp_pos >= filesize)
1634 if(ts_min > ts_max){
1636 }else if(ts_min == ts_max){
1641 while (pos_min < pos_limit) {
1642 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1643 pos_min, pos_max, ts_min, ts_max);
1644 assert(pos_limit <= pos_max);
1647 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1648 // interpolate position (better than dichotomy)
1649 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1650 + pos_min - approximate_keyframe_distance;
1651 }else if(no_change==1){
1652 // bisection, if interpolation failed to change min or max pos last time
1653 pos = (pos_min + pos_limit)>>1;
1655 /* linear search if bisection failed, can only happen if there
1656 are very few or no keyframes between min/max */
1661 else if(pos > pos_limit)
1665 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1670 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1671 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1672 pos_limit, start_pos, no_change);
1673 if(ts == AV_NOPTS_VALUE){
1674 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1677 assert(ts != AV_NOPTS_VALUE);
1678 if (target_ts <= ts) {
1679 pos_limit = start_pos - 1;
1683 if (target_ts >= ts) {
1689 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1690 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1692 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1694 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1695 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1696 pos, ts_min, target_ts, ts_max);
1701 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1702 int64_t pos_min, pos_max;
1706 if (stream_index < 0)
1709 st= s->streams[stream_index];
1712 pos_min = s->data_offset;
1713 pos_max = avio_size(s->pb) - 1;
1715 if (pos < pos_min) pos= pos_min;
1716 else if(pos > pos_max) pos= pos_max;
1718 avio_seek(s->pb, pos, SEEK_SET);
1721 av_update_cur_dts(s, st, ts);
1726 static int seek_frame_generic(AVFormatContext *s,
1727 int stream_index, int64_t timestamp, int flags)
1734 st = s->streams[stream_index];
1736 index = av_index_search_timestamp(st, timestamp, flags);
1738 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1741 if(index < 0 || index==st->nb_index_entries-1){
1745 if(st->nb_index_entries){
1746 assert(st->index_entries);
1747 ie= &st->index_entries[st->nb_index_entries-1];
1748 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1750 av_update_cur_dts(s, st, ie->timestamp);
1752 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1758 ret = av_read_frame(s, &pkt);
1759 }while(ret == AVERROR(EAGAIN));
1762 av_free_packet(&pkt);
1763 if(stream_index == pkt.stream_index){
1764 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1768 index = av_index_search_timestamp(st, timestamp, flags);
1773 ff_read_frame_flush(s);
1774 if (s->iformat->read_seek){
1775 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1778 ie = &st->index_entries[index];
1779 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1781 av_update_cur_dts(s, st, ie->timestamp);
1786 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1791 ff_read_frame_flush(s);
1793 if(flags & AVSEEK_FLAG_BYTE)
1794 return seek_frame_byte(s, stream_index, timestamp, flags);
1796 if(stream_index < 0){
1797 stream_index= av_find_default_stream_index(s);
1798 if(stream_index < 0)
1801 st= s->streams[stream_index];
1802 /* timestamp for default must be expressed in AV_TIME_BASE units */
1803 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1806 /* first, we try the format specific seek */
1807 if (s->iformat->read_seek)
1808 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1815 if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
1816 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1817 else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
1818 return seek_frame_generic(s, stream_index, timestamp, flags);
1823 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1825 if(min_ts > ts || max_ts < ts)
1828 ff_read_frame_flush(s);
1830 if (s->iformat->read_seek2)
1831 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1833 if(s->iformat->read_timestamp){
1834 //try to seek via read_timestamp()
1837 //Fallback to old API if new is not implemented but old is
1838 //Note the old has somewat different sematics
1839 if(s->iformat->read_seek || 1)
1840 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1842 // try some generic seek like seek_frame_generic() but with new ts semantics
1845 /*******************************************************/
1848 * Return TRUE if the stream has accurate duration in any stream.
1850 * @return TRUE if the stream has accurate duration for at least one component.
1852 static int has_duration(AVFormatContext *ic)
1857 for(i = 0;i < ic->nb_streams; i++) {
1858 st = ic->streams[i];
1859 if (st->duration != AV_NOPTS_VALUE)
1866 * Estimate the stream timings from the one of each components.
1868 * Also computes the global bitrate if possible.
1870 static void update_stream_timings(AVFormatContext *ic)
1872 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
1873 int64_t duration, duration1;
1877 start_time = INT64_MAX;
1878 start_time_text = INT64_MAX;
1879 end_time = INT64_MIN;
1880 duration = INT64_MIN;
1881 for(i = 0;i < ic->nb_streams; i++) {
1882 st = ic->streams[i];
1883 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1884 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1885 if (st->codec->codec_id == CODEC_ID_DVB_TELETEXT) {
1886 if (start_time1 < start_time_text)
1887 start_time_text = start_time1;
1889 if (start_time1 < start_time)
1890 start_time = start_time1;
1891 if (st->duration != AV_NOPTS_VALUE) {
1892 end_time1 = start_time1
1893 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1894 if (end_time1 > end_time)
1895 end_time = end_time1;
1898 if (st->duration != AV_NOPTS_VALUE) {
1899 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1900 if (duration1 > duration)
1901 duration = duration1;
1904 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
1905 start_time = start_time_text;
1906 if (start_time != INT64_MAX) {
1907 ic->start_time = start_time;
1908 if (end_time != INT64_MIN) {
1909 if (end_time - start_time > duration)
1910 duration = end_time - start_time;
1913 if (duration != INT64_MIN) {
1914 ic->duration = duration;
1915 if (ic->file_size > 0) {
1916 /* compute the bitrate */
1917 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1918 (double)ic->duration;
1923 static void fill_all_stream_timings(AVFormatContext *ic)
1928 update_stream_timings(ic);
1929 for(i = 0;i < ic->nb_streams; i++) {
1930 st = ic->streams[i];
1931 if (st->start_time == AV_NOPTS_VALUE) {
1932 if(ic->start_time != AV_NOPTS_VALUE)
1933 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1934 if(ic->duration != AV_NOPTS_VALUE)
1935 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1940 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1942 int64_t filesize, duration;
1946 /* if bit_rate is already set, we believe it */
1947 if (ic->bit_rate <= 0) {
1949 for(i=0;i<ic->nb_streams;i++) {
1950 st = ic->streams[i];
1951 if (st->codec->bit_rate > 0)
1952 bit_rate += st->codec->bit_rate;
1954 ic->bit_rate = bit_rate;
1957 /* if duration is already set, we believe it */
1958 if (ic->duration == AV_NOPTS_VALUE &&
1959 ic->bit_rate != 0 &&
1960 ic->file_size != 0) {
1961 filesize = ic->file_size;
1963 for(i = 0; i < ic->nb_streams; i++) {
1964 st = ic->streams[i];
1965 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1966 if (st->duration == AV_NOPTS_VALUE)
1967 st->duration = duration;
1973 #define DURATION_MAX_READ_SIZE 250000
1974 #define DURATION_MAX_RETRY 3
1976 /* only usable for MPEG-PS streams */
1977 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1979 AVPacket pkt1, *pkt = &pkt1;
1981 int read_size, i, ret;
1983 int64_t filesize, offset, duration;
1988 /* flush packet queue */
1989 flush_packet_queue(ic);
1991 for (i=0; i<ic->nb_streams; i++) {
1992 st = ic->streams[i];
1993 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1994 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1997 av_parser_close(st->parser);
1999 av_free_packet(&st->cur_pkt);
2003 /* estimate the end time (duration) */
2004 /* XXX: may need to support wrapping */
2005 filesize = ic->file_size;
2006 end_time = AV_NOPTS_VALUE;
2008 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
2012 avio_seek(ic->pb, offset, SEEK_SET);
2015 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
2019 ret = av_read_packet(ic, pkt);
2020 } while(ret == AVERROR(EAGAIN));
2023 read_size += pkt->size;
2024 st = ic->streams[pkt->stream_index];
2025 if (pkt->pts != AV_NOPTS_VALUE &&
2026 (st->start_time != AV_NOPTS_VALUE ||
2027 st->first_dts != AV_NOPTS_VALUE)) {
2028 duration = end_time = pkt->pts;
2029 if (st->start_time != AV_NOPTS_VALUE)
2030 duration -= st->start_time;
2032 duration -= st->first_dts;
2034 duration += 1LL<<st->pts_wrap_bits;
2036 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
2037 st->duration = duration;
2040 av_free_packet(pkt);
2042 }while( end_time==AV_NOPTS_VALUE
2043 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2044 && ++retry <= DURATION_MAX_RETRY);
2046 fill_all_stream_timings(ic);
2048 avio_seek(ic->pb, old_offset, SEEK_SET);
2049 for (i=0; i<ic->nb_streams; i++) {
2051 st->cur_dts= st->first_dts;
2052 st->last_IP_pts = AV_NOPTS_VALUE;
2053 st->reference_dts = AV_NOPTS_VALUE;
2057 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2061 /* get the file size, if possible */
2062 if (ic->iformat->flags & AVFMT_NOFILE) {
2065 file_size = avio_size(ic->pb);
2069 ic->file_size = file_size;
2071 if ((!strcmp(ic->iformat->name, "mpeg") ||
2072 !strcmp(ic->iformat->name, "mpegts")) &&
2073 file_size && ic->pb->seekable) {
2074 /* get accurate estimate from the PTSes */
2075 estimate_timings_from_pts(ic, old_offset);
2076 } else if (has_duration(ic)) {
2077 /* at least one component has timings - we use them for all
2079 fill_all_stream_timings(ic);
2081 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2082 /* less precise: use bitrate info */
2083 estimate_timings_from_bit_rate(ic);
2085 update_stream_timings(ic);
2090 AVStream av_unused *st;
2091 for(i = 0;i < ic->nb_streams; i++) {
2092 st = ic->streams[i];
2093 printf("%d: start_time: %0.3f duration: %0.3f\n",
2094 i, (double)st->start_time / AV_TIME_BASE,
2095 (double)st->duration / AV_TIME_BASE);
2097 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2098 (double)ic->start_time / AV_TIME_BASE,
2099 (double)ic->duration / AV_TIME_BASE,
2100 ic->bit_rate / 1000);
2105 static int has_codec_parameters(AVCodecContext *avctx)
2108 switch (avctx->codec_type) {
2109 case AVMEDIA_TYPE_AUDIO:
2110 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
2111 if(!avctx->frame_size &&
2112 (avctx->codec_id == CODEC_ID_VORBIS ||
2113 avctx->codec_id == CODEC_ID_AAC ||
2114 avctx->codec_id == CODEC_ID_MP1 ||
2115 avctx->codec_id == CODEC_ID_MP2 ||
2116 avctx->codec_id == CODEC_ID_MP3 ||
2117 avctx->codec_id == CODEC_ID_SPEEX ||
2118 avctx->codec_id == CODEC_ID_CELT))
2121 case AVMEDIA_TYPE_VIDEO:
2122 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2128 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2131 static int has_decode_delay_been_guessed(AVStream *st)
2133 return st->codec->codec_id != CODEC_ID_H264 ||
2134 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2137 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2141 int got_picture, data_size, ret=0;
2144 if(!st->codec->codec){
2145 codec = avcodec_find_decoder(st->codec->codec_id);
2148 ret = avcodec_open2(st->codec, codec, options);
2153 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st) ||
2154 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF)) {
2155 switch(st->codec->codec_type) {
2156 case AVMEDIA_TYPE_VIDEO:
2157 avcodec_get_frame_defaults(&picture);
2158 ret = avcodec_decode_video2(st->codec, &picture,
2159 &got_picture, avpkt);
2161 case AVMEDIA_TYPE_AUDIO:
2162 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2163 samples = av_malloc(data_size);
2166 ret = avcodec_decode_audio3(st->codec, samples,
2178 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2180 while (tags->id != CODEC_ID_NONE) {
2188 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2191 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2192 if(tag == tags[i].tag)
2195 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2196 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2199 return CODEC_ID_NONE;
2202 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2205 for(i=0; tags && tags[i]; i++){
2206 int tag= ff_codec_get_tag(tags[i], id);
2212 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2215 for(i=0; tags && tags[i]; i++){
2216 enum CodecID id= ff_codec_get_id(tags[i], tag);
2217 if(id!=CODEC_ID_NONE) return id;
2219 return CODEC_ID_NONE;
2222 static void compute_chapters_end(AVFormatContext *s)
2225 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2227 for (i = 0; i < s->nb_chapters; i++)
2228 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2229 AVChapter *ch = s->chapters[i];
2230 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2233 for (j = 0; j < s->nb_chapters; j++) {
2234 AVChapter *ch1 = s->chapters[j];
2235 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2236 if (j != i && next_start > ch->start && next_start < end)
2239 ch->end = (end == INT64_MAX) ? ch->start : end;
2243 static int get_std_framerate(int i){
2244 if(i<60*12) return i*1001;
2245 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2249 * Is the time base unreliable.
2250 * This is a heuristic to balance between quick acceptance of the values in
2251 * the headers vs. some extra checks.
2252 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2253 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2254 * And there are "variable" fps files this needs to detect as well.
2256 static int tb_unreliable(AVCodecContext *c){
2257 if( c->time_base.den >= 101L*c->time_base.num
2258 || c->time_base.den < 5L*c->time_base.num
2259 /* || c->codec_tag == AV_RL32("DIVX")
2260 || c->codec_tag == AV_RL32("XVID")*/
2261 || c->codec_id == CODEC_ID_MPEG2VIDEO
2262 || c->codec_id == CODEC_ID_H264
2268 #if FF_API_FORMAT_PARAMETERS
2269 int av_find_stream_info(AVFormatContext *ic)
2271 return avformat_find_stream_info(ic, NULL);
2275 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2277 int i, count, ret, read_size, j;
2279 AVPacket pkt1, *pkt;
2280 int64_t old_offset = avio_tell(ic->pb);
2281 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2283 for(i=0;i<ic->nb_streams;i++) {
2285 st = ic->streams[i];
2286 if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size) {
2287 // We need to discard these since they can be plain wrong for
2288 // backwards compatible HE-AAC signaling.
2289 // But when we have no extradata we need to keep them or we can't
2290 // play anything at all.
2291 st->codec->sample_rate = 0;
2292 st->codec->frame_size = 0;
2293 st->codec->channels = 0;
2296 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2297 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2298 /* if(!st->time_base.num)
2300 if(!st->codec->time_base.num)
2301 st->codec->time_base= st->time_base;
2303 //only for the split stuff
2304 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2305 st->parser = av_parser_init(st->codec->codec_id);
2306 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2307 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2310 assert(!st->codec->codec);
2311 codec = avcodec_find_decoder(st->codec->codec_id);
2313 /* Ensure that subtitle_header is properly set. */
2314 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2315 && codec && !st->codec->codec)
2316 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2318 //try to just open decoders, in case this is enough to get parameters
2319 if(!has_codec_parameters(st->codec)){
2320 if (codec && !st->codec->codec)
2321 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2325 for (i=0; i<ic->nb_streams; i++) {
2326 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2332 if(url_interrupt_cb()){
2334 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2338 /* check if one codec still needs to be handled */
2339 for(i=0;i<ic->nb_streams;i++) {
2340 int fps_analyze_framecount = 20;
2342 st = ic->streams[i];
2343 if (!has_codec_parameters(st->codec))
2345 /* if the timebase is coarse (like the usual millisecond precision
2346 of mkv), we need to analyze more frames to reliably arrive at
2348 if (av_q2d(st->time_base) > 0.0005)
2349 fps_analyze_framecount *= 2;
2350 if (ic->fps_probe_size >= 0)
2351 fps_analyze_framecount = ic->fps_probe_size;
2352 /* variable fps and no guess at the real fps */
2353 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2354 && st->info->duration_count < fps_analyze_framecount
2355 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2357 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2359 if(st->first_dts == AV_NOPTS_VALUE)
2362 if (i == ic->nb_streams) {
2363 /* NOTE: if the format has no header, then we need to read
2364 some packets to get most of the streams, so we cannot
2366 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2367 /* if we found the info for all the codecs, we can stop */
2369 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2373 /* we did not get all the codec info, but we read too much data */
2374 if (read_size >= ic->probesize) {
2376 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2380 /* NOTE: a new stream can be added there if no header in file
2381 (AVFMTCTX_NOHEADER) */
2382 ret = read_frame_internal(ic, &pkt1);
2383 if (ret == AVERROR(EAGAIN))
2388 ret = -1; /* we could not have all the codec parameters before EOF */
2389 for(i=0;i<ic->nb_streams;i++) {
2390 st = ic->streams[i];
2391 if (!has_codec_parameters(st->codec)){
2393 avcodec_string(buf, sizeof(buf), st->codec, 0);
2394 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2402 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2403 if ((ret = av_dup_packet(pkt)) < 0)
2404 goto find_stream_info_err;
2406 read_size += pkt->size;
2408 st = ic->streams[pkt->stream_index];
2409 if (st->codec_info_nb_frames>1) {
2411 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) {
2412 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t);
2415 st->info->codec_info_duration += pkt->duration;
2418 int64_t last = st->info->last_dts;
2419 int64_t duration= pkt->dts - last;
2421 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2422 double dur= duration * av_q2d(st->time_base);
2424 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2425 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2426 if (st->info->duration_count < 2)
2427 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2428 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2429 int framerate= get_std_framerate(i);
2430 int ticks= lrintf(dur*framerate/(1001*12));
2431 double error= dur - ticks*1001*12/(double)framerate;
2432 st->info->duration_error[i] += error*error;
2434 st->info->duration_count++;
2435 // ignore the first 4 values, they might have some random jitter
2436 if (st->info->duration_count > 3)
2437 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2439 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2440 st->info->last_dts = pkt->dts;
2442 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2443 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2445 st->codec->extradata_size= i;
2446 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2447 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2448 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2452 /* if still no information, we try to open the codec and to
2453 decompress the frame. We try to avoid that in most cases as
2454 it takes longer and uses more memory. For MPEG-4, we need to
2455 decompress for QuickTime.
2457 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2458 least one frame of codec data, this makes sure the codec initializes
2459 the channel configuration and does not only trust the values from the container.
2461 try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL);
2463 st->codec_info_nb_frames++;
2467 // close codecs which were opened in try_decode_frame()
2468 for(i=0;i<ic->nb_streams;i++) {
2469 st = ic->streams[i];
2470 if(st->codec->codec)
2471 avcodec_close(st->codec);
2473 for(i=0;i<ic->nb_streams;i++) {
2474 st = ic->streams[i];
2475 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2476 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2477 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2478 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2479 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2480 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){
2481 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2482 if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt)
2483 st->codec->codec_tag= tag;
2486 // the check for tb_unreliable() is not completely correct, since this is not about handling
2487 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2488 // ipmovie.c produces.
2489 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)
2490 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);
2491 if (st->info->duration_count && !st->r_frame_rate.num
2492 && tb_unreliable(st->codec) /*&&
2493 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2494 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2496 double best_error= 2*av_q2d(st->time_base);
2497 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2499 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2500 double error = st->info->duration_error[j] * get_std_framerate(j);
2501 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2502 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2503 if(error < best_error){
2505 num = get_std_framerate(j);
2508 // do not increase frame rate by more than 1 % in order to match a standard rate.
2509 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2510 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2513 if (!st->r_frame_rate.num){
2514 if( st->codec->time_base.den * (int64_t)st->time_base.num
2515 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2516 st->r_frame_rate.num = st->codec->time_base.den;
2517 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2519 st->r_frame_rate.num = st->time_base.den;
2520 st->r_frame_rate.den = st->time_base.num;
2523 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2524 if(!st->codec->bits_per_coded_sample)
2525 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2526 // set stream disposition based on audio service type
2527 switch (st->codec->audio_service_type) {
2528 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2529 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2530 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2531 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2532 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2533 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2534 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2535 st->disposition = AV_DISPOSITION_COMMENT; break;
2536 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2537 st->disposition = AV_DISPOSITION_KARAOKE; break;
2542 estimate_timings(ic, old_offset);
2544 compute_chapters_end(ic);
2547 /* correct DTS for B-frame streams with no timestamps */
2548 for(i=0;i<ic->nb_streams;i++) {
2549 st = ic->streams[i];
2550 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2552 ppktl = &ic->packet_buffer;
2554 if(ppkt1->stream_index != i)
2556 if(ppkt1->pkt->dts < 0)
2558 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2560 ppkt1->pkt->dts -= delta;
2565 st->cur_dts -= delta;
2571 find_stream_info_err:
2572 for (i=0; i < ic->nb_streams; i++)
2573 av_freep(&ic->streams[i]->info);
2577 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2581 for (i = 0; i < ic->nb_programs; i++)
2582 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2583 if (ic->programs[i]->stream_index[j] == s)
2584 return ic->programs[i];
2588 int av_find_best_stream(AVFormatContext *ic,
2589 enum AVMediaType type,
2590 int wanted_stream_nb,
2592 AVCodec **decoder_ret,
2595 int i, nb_streams = ic->nb_streams;
2596 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2597 unsigned *program = NULL;
2598 AVCodec *decoder = NULL, *best_decoder = NULL;
2600 if (related_stream >= 0 && wanted_stream_nb < 0) {
2601 AVProgram *p = find_program_from_stream(ic, related_stream);
2603 program = p->stream_index;
2604 nb_streams = p->nb_stream_indexes;
2607 for (i = 0; i < nb_streams; i++) {
2608 int real_stream_index = program ? program[i] : i;
2609 AVStream *st = ic->streams[real_stream_index];
2610 AVCodecContext *avctx = st->codec;
2611 if (avctx->codec_type != type)
2613 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2615 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2618 decoder = avcodec_find_decoder(st->codec->codec_id);
2621 ret = AVERROR_DECODER_NOT_FOUND;
2625 if (best_count >= st->codec_info_nb_frames)
2627 best_count = st->codec_info_nb_frames;
2628 ret = real_stream_index;
2629 best_decoder = decoder;
2630 if (program && i == nb_streams - 1 && ret < 0) {
2632 nb_streams = ic->nb_streams;
2633 i = 0; /* no related stream found, try again with everything */
2637 *decoder_ret = best_decoder;
2641 /*******************************************************/
2643 int av_read_play(AVFormatContext *s)
2645 if (s->iformat->read_play)
2646 return s->iformat->read_play(s);
2648 return avio_pause(s->pb, 0);
2649 return AVERROR(ENOSYS);
2652 int av_read_pause(AVFormatContext *s)
2654 if (s->iformat->read_pause)
2655 return s->iformat->read_pause(s);
2657 return avio_pause(s->pb, 1);
2658 return AVERROR(ENOSYS);
2661 void av_close_input_stream(AVFormatContext *s)
2663 flush_packet_queue(s);
2664 if (s->iformat->read_close)
2665 s->iformat->read_close(s);
2666 avformat_free_context(s);
2669 void avformat_free_context(AVFormatContext *s)
2675 if (s->iformat && s->iformat->priv_class && s->priv_data)
2676 av_opt_free(s->priv_data);
2678 for(i=0;i<s->nb_streams;i++) {
2679 /* free all data in a stream component */
2682 av_parser_close(st->parser);
2683 av_free_packet(&st->cur_pkt);
2685 av_dict_free(&st->metadata);
2686 av_free(st->index_entries);
2687 av_free(st->codec->extradata);
2688 av_free(st->codec->subtitle_header);
2690 av_free(st->priv_data);
2694 for(i=s->nb_programs-1; i>=0; i--) {
2695 av_dict_free(&s->programs[i]->metadata);
2696 av_freep(&s->programs[i]->stream_index);
2697 av_freep(&s->programs[i]);
2699 av_freep(&s->programs);
2700 av_freep(&s->priv_data);
2701 while(s->nb_chapters--) {
2702 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2703 av_free(s->chapters[s->nb_chapters]);
2705 av_freep(&s->chapters);
2706 av_dict_free(&s->metadata);
2707 av_freep(&s->streams);
2711 void av_close_input_file(AVFormatContext *s)
2713 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2715 av_close_input_stream(s);
2720 AVStream *av_new_stream(AVFormatContext *s, int id)
2726 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2728 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2731 s->streams = streams;
2733 st = av_mallocz(sizeof(AVStream));
2736 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2741 st->codec = avcodec_alloc_context3(NULL);
2743 /* no default bitrate if decoding */
2744 st->codec->bit_rate = 0;
2746 st->index = s->nb_streams;
2748 st->start_time = AV_NOPTS_VALUE;
2749 st->duration = AV_NOPTS_VALUE;
2750 /* we set the current DTS to 0 so that formats without any timestamps
2751 but durations get some timestamps, formats with some unknown
2752 timestamps have their first few packets buffered and the
2753 timestamps corrected before they are returned to the user */
2755 st->first_dts = AV_NOPTS_VALUE;
2756 st->probe_packets = MAX_PROBE_PACKETS;
2758 /* default pts setting is MPEG-like */
2759 av_set_pts_info(st, 33, 1, 90000);
2760 st->last_IP_pts = AV_NOPTS_VALUE;
2761 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2762 st->pts_buffer[i]= AV_NOPTS_VALUE;
2763 st->reference_dts = AV_NOPTS_VALUE;
2765 st->sample_aspect_ratio = (AVRational){0,1};
2767 s->streams[s->nb_streams++] = st;
2771 AVProgram *av_new_program(AVFormatContext *ac, int id)
2773 AVProgram *program=NULL;
2776 av_dlog(ac, "new_program: id=0x%04x\n", id);
2778 for(i=0; i<ac->nb_programs; i++)
2779 if(ac->programs[i]->id == id)
2780 program = ac->programs[i];
2783 program = av_mallocz(sizeof(AVProgram));
2786 dynarray_add(&ac->programs, &ac->nb_programs, program);
2787 program->discard = AVDISCARD_NONE;
2794 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2796 AVChapter *chapter = NULL;
2799 for(i=0; i<s->nb_chapters; i++)
2800 if(s->chapters[i]->id == id)
2801 chapter = s->chapters[i];
2804 chapter= av_mallocz(sizeof(AVChapter));
2807 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2809 av_dict_set(&chapter->metadata, "title", title, 0);
2811 chapter->time_base= time_base;
2812 chapter->start = start;
2818 /************************************************************/
2819 /* output media file */
2821 #if FF_API_FORMAT_PARAMETERS
2822 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2824 if (s->oformat->priv_data_size > 0) {
2825 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2827 return AVERROR(ENOMEM);
2828 if (s->oformat->priv_class) {
2829 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2830 av_opt_set_defaults(s->priv_data);
2833 s->priv_data = NULL;
2839 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
2840 const char *format, const char *filename)
2842 AVFormatContext *s = avformat_alloc_context();
2851 oformat = av_guess_format(format, NULL, NULL);
2853 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
2854 ret = AVERROR(EINVAL);
2858 oformat = av_guess_format(NULL, filename, NULL);
2860 ret = AVERROR(EINVAL);
2861 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
2868 s->oformat = oformat;
2869 if (s->oformat->priv_data_size > 0) {
2870 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2873 if (s->oformat->priv_class) {
2874 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2875 av_opt_set_defaults(s->priv_data);
2878 s->priv_data = NULL;
2881 av_strlcpy(s->filename, filename, sizeof(s->filename));
2885 av_log(s, AV_LOG_ERROR, "Out of memory\n");
2886 ret = AVERROR(ENOMEM);
2888 avformat_free_context(s);
2892 #if FF_API_ALLOC_OUTPUT_CONTEXT
2893 AVFormatContext *avformat_alloc_output_context(const char *format,
2894 AVOutputFormat *oformat, const char *filename)
2896 AVFormatContext *avctx;
2897 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
2898 return ret < 0 ? NULL : avctx;
2902 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2904 const AVCodecTag *avctag;
2906 enum CodecID id = CODEC_ID_NONE;
2907 unsigned int tag = 0;
2910 * Check that tag + id is in the table
2911 * If neither is in the table -> OK
2912 * If tag is in the table with another id -> FAIL
2913 * If id is in the table with another tag -> FAIL unless strict < normal
2915 for (n = 0; s->oformat->codec_tag[n]; n++) {
2916 avctag = s->oformat->codec_tag[n];
2917 while (avctag->id != CODEC_ID_NONE) {
2918 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2920 if (id == st->codec->codec_id)
2923 if (avctag->id == st->codec->codec_id)
2928 if (id != CODEC_ID_NONE)
2930 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2935 #if FF_API_FORMAT_PARAMETERS
2936 int av_write_header(AVFormatContext *s)
2938 return avformat_write_header(s, NULL);
2942 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2946 AVDictionary *tmp = NULL;
2949 av_dict_copy(&tmp, *options, 0);
2950 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2952 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
2953 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2956 // some sanity checks
2957 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2958 av_log(s, AV_LOG_ERROR, "no streams\n");
2959 ret = AVERROR(EINVAL);
2963 for(i=0;i<s->nb_streams;i++) {
2966 switch (st->codec->codec_type) {
2967 case AVMEDIA_TYPE_AUDIO:
2968 if(st->codec->sample_rate<=0){
2969 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2970 ret = AVERROR(EINVAL);
2973 if(!st->codec->block_align)
2974 st->codec->block_align = st->codec->channels *
2975 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2977 case AVMEDIA_TYPE_VIDEO:
2978 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2979 av_log(s, AV_LOG_ERROR, "time base not set\n");
2980 ret = AVERROR(EINVAL);
2983 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2984 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2985 ret = AVERROR(EINVAL);
2988 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2989 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2990 ret = AVERROR(EINVAL);
2996 if(s->oformat->codec_tag){
2997 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)){
2998 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2999 st->codec->codec_tag= 0;
3001 if(st->codec->codec_tag){
3002 if (!validate_codec_tag(s, st)) {
3004 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
3005 av_log(s, AV_LOG_ERROR,
3006 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
3007 tagbuf, st->codec->codec_tag, st->codec->codec_id);
3008 ret = AVERROR_INVALIDDATA;
3012 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
3015 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
3016 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
3017 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
3020 if (!s->priv_data && s->oformat->priv_data_size > 0) {
3021 s->priv_data = av_mallocz(s->oformat->priv_data_size);
3022 if (!s->priv_data) {
3023 ret = AVERROR(ENOMEM);
3026 if (s->oformat->priv_class) {
3027 *(const AVClass**)s->priv_data= s->oformat->priv_class;
3028 av_opt_set_defaults(s->priv_data);
3029 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
3034 /* set muxer identification string */
3035 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
3036 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
3039 if(s->oformat->write_header){
3040 ret = s->oformat->write_header(s);
3045 /* init PTS generation */
3046 for(i=0;i<s->nb_streams;i++) {
3047 int64_t den = AV_NOPTS_VALUE;
3050 switch (st->codec->codec_type) {
3051 case AVMEDIA_TYPE_AUDIO:
3052 den = (int64_t)st->time_base.num * st->codec->sample_rate;
3054 case AVMEDIA_TYPE_VIDEO:
3055 den = (int64_t)st->time_base.num * st->codec->time_base.den;
3060 if (den != AV_NOPTS_VALUE) {
3062 ret = AVERROR_INVALIDDATA;
3065 frac_init(&st->pts, 0, 0, den);
3070 av_dict_free(options);
3079 //FIXME merge with compute_pkt_fields
3080 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
3081 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
3082 int num, den, frame_size, i;
3084 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
3085 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
3087 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
3088 return AVERROR(EINVAL);*/
3090 /* duration field */
3091 if (pkt->duration == 0) {
3092 compute_frame_duration(&num, &den, st, NULL, pkt);
3094 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
3098 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
3101 //XXX/FIXME this is a temporary hack until all encoders output pts
3102 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
3104 // pkt->pts= st->cur_dts;
3105 pkt->pts= st->pts.val;
3108 //calculate dts from pts
3109 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
3110 st->pts_buffer[0]= pkt->pts;
3111 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
3112 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
3113 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
3114 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
3116 pkt->dts= st->pts_buffer[0];
3119 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)){
3120 av_log(s, AV_LOG_ERROR,
3121 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
3122 st->index, st->cur_dts, pkt->dts);
3123 return AVERROR(EINVAL);
3125 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3126 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3127 return AVERROR(EINVAL);
3130 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3131 st->cur_dts= pkt->dts;
3132 st->pts.val= pkt->dts;
3135 switch (st->codec->codec_type) {
3136 case AVMEDIA_TYPE_AUDIO:
3137 frame_size = get_audio_frame_size(st->codec, pkt->size);
3139 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3140 likely equal to the encoder delay, but it would be better if we
3141 had the real timestamps from the encoder */
3142 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3143 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3146 case AVMEDIA_TYPE_VIDEO:
3147 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3155 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3157 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3159 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3162 ret= s->oformat->write_packet(s, pkt);
3165 s->streams[pkt->stream_index]->nb_frames++;
3169 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3170 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3172 AVPacketList **next_point, *this_pktl;
3174 this_pktl = av_mallocz(sizeof(AVPacketList));
3175 this_pktl->pkt= *pkt;
3176 pkt->destruct= NULL; // do not free original but only the copy
3177 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3179 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3180 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3182 next_point = &s->packet_buffer;
3185 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3186 while(!compare(s, &(*next_point)->pkt, pkt)){
3187 next_point= &(*next_point)->next;
3191 next_point = &(s->packet_buffer_end->next);
3194 assert(!*next_point);
3196 s->packet_buffer_end= this_pktl;
3199 this_pktl->next= *next_point;
3201 s->streams[pkt->stream_index]->last_in_packet_buffer=
3202 *next_point= this_pktl;
3205 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3207 AVStream *st = s->streams[ pkt ->stream_index];
3208 AVStream *st2= s->streams[ next->stream_index];
3209 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3213 return pkt->stream_index < next->stream_index;
3217 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3223 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3226 for(i=0; i < s->nb_streams; i++)
3227 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3229 if(stream_count && (s->nb_streams == stream_count || flush)){
3230 pktl= s->packet_buffer;
3233 s->packet_buffer= pktl->next;
3234 if(!s->packet_buffer)
3235 s->packet_buffer_end= NULL;
3237 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3238 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3242 av_init_packet(out);
3248 * Interleave an AVPacket correctly so it can be muxed.
3249 * @param out the interleaved packet will be output here
3250 * @param in the input packet
3251 * @param flush 1 if no further packets are available as input and all
3252 * remaining packets should be output
3253 * @return 1 if a packet was output, 0 if no packet could be output,
3254 * < 0 if an error occurred
3256 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3257 if(s->oformat->interleave_packet)
3258 return s->oformat->interleave_packet(s, out, in, flush);
3260 return av_interleave_packet_per_dts(s, out, in, flush);
3263 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3264 AVStream *st= s->streams[ pkt->stream_index];
3267 //FIXME/XXX/HACK drop zero sized packets
3268 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3271 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3272 pkt->size, pkt->dts, pkt->pts);
3273 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3276 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3277 return AVERROR(EINVAL);
3281 int ret= interleave_packet(s, &opkt, pkt, 0);
3282 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3285 ret= s->oformat->write_packet(s, &opkt);
3287 s->streams[opkt.stream_index]->nb_frames++;
3289 av_free_packet(&opkt);
3294 if(url_ferror(s->pb))
3295 return url_ferror(s->pb);
3299 int av_write_trailer(AVFormatContext *s)
3305 ret= interleave_packet(s, &pkt, NULL, 1);
3306 if(ret<0) //FIXME cleanup needed for ret<0 ?
3311 ret= s->oformat->write_packet(s, &pkt);
3313 s->streams[pkt.stream_index]->nb_frames++;
3315 av_free_packet(&pkt);
3319 if(url_ferror(s->pb))
3323 if(s->oformat->write_trailer)
3324 ret = s->oformat->write_trailer(s);
3327 ret=url_ferror(s->pb);
3328 for(i=0;i<s->nb_streams;i++) {
3329 av_freep(&s->streams[i]->priv_data);
3330 av_freep(&s->streams[i]->index_entries);
3332 if (s->iformat && s->iformat->priv_class)
3333 av_opt_free(s->priv_data);
3334 av_freep(&s->priv_data);
3338 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
3339 int64_t *dts, int64_t *wall)
3341 if (!s->oformat || !s->oformat->get_output_timestamp)
3342 return AVERROR(ENOSYS);
3343 s->oformat->get_output_timestamp(s, stream, dts, wall);
3347 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3350 AVProgram *program=NULL;
3353 if (idx >= ac->nb_streams) {
3354 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3358 for(i=0; i<ac->nb_programs; i++){
3359 if(ac->programs[i]->id != progid)
3361 program = ac->programs[i];
3362 for(j=0; j<program->nb_stream_indexes; j++)
3363 if(program->stream_index[j] == idx)
3366 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3369 program->stream_index = tmp;
3370 program->stream_index[program->nb_stream_indexes++] = idx;
3375 static void print_fps(double d, const char *postfix){
3376 uint64_t v= lrintf(d*100);
3377 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3378 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3379 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3382 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3384 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3385 AVDictionaryEntry *tag=NULL;
3387 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3388 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3389 if(strcmp("language", tag->key)){
3392 av_strlcpy(tmp, tag->value, sizeof(tmp));
3393 for(i=0; i<strlen(tmp); i++) if(tmp[i]==0xd) tmp[i]=' ';
3394 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tmp);
3400 /* "user interface" functions */
3401 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3404 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3405 AVStream *st = ic->streams[i];
3406 int g = av_gcd(st->time_base.num, st->time_base.den);
3407 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3408 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3409 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3410 /* the pid is an important information, so we display it */
3411 /* XXX: add a generic system */
3412 if (flags & AVFMT_SHOW_IDS)
3413 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3415 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3416 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3417 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3418 if (st->sample_aspect_ratio.num && // default
3419 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3420 AVRational display_aspect_ratio;
3421 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3422 st->codec->width*st->sample_aspect_ratio.num,
3423 st->codec->height*st->sample_aspect_ratio.den,
3425 av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d",
3426 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3427 display_aspect_ratio.num, display_aspect_ratio.den);
3429 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3430 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3431 print_fps(av_q2d(st->avg_frame_rate), "fps");
3432 if(st->r_frame_rate.den && st->r_frame_rate.num)
3433 print_fps(av_q2d(st->r_frame_rate), "tbr");
3434 if(st->time_base.den && st->time_base.num)
3435 print_fps(1/av_q2d(st->time_base), "tbn");
3436 if(st->codec->time_base.den && st->codec->time_base.num)
3437 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3439 if (st->disposition & AV_DISPOSITION_DEFAULT)
3440 av_log(NULL, AV_LOG_INFO, " (default)");
3441 if (st->disposition & AV_DISPOSITION_DUB)
3442 av_log(NULL, AV_LOG_INFO, " (dub)");
3443 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3444 av_log(NULL, AV_LOG_INFO, " (original)");
3445 if (st->disposition & AV_DISPOSITION_COMMENT)
3446 av_log(NULL, AV_LOG_INFO, " (comment)");
3447 if (st->disposition & AV_DISPOSITION_LYRICS)
3448 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3449 if (st->disposition & AV_DISPOSITION_KARAOKE)
3450 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3451 if (st->disposition & AV_DISPOSITION_FORCED)
3452 av_log(NULL, AV_LOG_INFO, " (forced)");
3453 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3454 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3455 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3456 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3457 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3458 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3459 av_log(NULL, AV_LOG_INFO, "\n");
3460 dump_metadata(NULL, st->metadata, " ");
3463 #if FF_API_DUMP_FORMAT
3464 void dump_format(AVFormatContext *ic,
3469 av_dump_format(ic, index, url, is_output);
3473 void av_dump_format(AVFormatContext *ic,
3479 uint8_t *printed = av_mallocz(ic->nb_streams);
3480 if (ic->nb_streams && !printed)
3483 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3484 is_output ? "Output" : "Input",
3486 is_output ? ic->oformat->name : ic->iformat->name,
3487 is_output ? "to" : "from", url);
3488 dump_metadata(NULL, ic->metadata, " ");
3490 av_log(NULL, AV_LOG_INFO, " Duration: ");
3491 if (ic->duration != AV_NOPTS_VALUE) {
3492 int hours, mins, secs, us;
3493 secs = ic->duration / AV_TIME_BASE;
3494 us = ic->duration % AV_TIME_BASE;
3499 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3500 (100 * us) / AV_TIME_BASE);
3502 av_log(NULL, AV_LOG_INFO, "N/A");
3504 if (ic->start_time != AV_NOPTS_VALUE) {
3506 av_log(NULL, AV_LOG_INFO, ", start: ");
3507 secs = ic->start_time / AV_TIME_BASE;
3508 us = abs(ic->start_time % AV_TIME_BASE);
3509 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3510 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3512 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3514 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3516 av_log(NULL, AV_LOG_INFO, "N/A");
3518 av_log(NULL, AV_LOG_INFO, "\n");
3520 for (i = 0; i < ic->nb_chapters; i++) {
3521 AVChapter *ch = ic->chapters[i];
3522 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3523 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3524 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3526 dump_metadata(NULL, ch->metadata, " ");
3528 if(ic->nb_programs) {
3529 int j, k, total = 0;
3530 for(j=0; j<ic->nb_programs; j++) {
3531 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3533 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3534 name ? name->value : "");
3535 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3536 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3537 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3538 printed[ic->programs[j]->stream_index[k]] = 1;
3540 total += ic->programs[j]->nb_stream_indexes;
3542 if (total < ic->nb_streams)
3543 av_log(NULL, AV_LOG_INFO, " No Program\n");
3545 for(i=0;i<ic->nb_streams;i++)
3547 dump_stream_format(ic, i, index, is_output);
3552 int64_t av_gettime(void)
3555 gettimeofday(&tv,NULL);
3556 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3559 uint64_t ff_ntp_time(void)
3561 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3564 #if FF_API_PARSE_DATE
3565 #include "libavutil/parseutils.h"
3567 int64_t parse_date(const char *timestr, int duration)
3570 av_parse_time(&timeval, timestr, duration);
3575 #if FF_API_FIND_INFO_TAG
3576 #include "libavutil/parseutils.h"
3578 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3580 return av_find_info_tag(arg, arg_size, tag1, info);
3584 int av_get_frame_filename(char *buf, int buf_size,
3585 const char *path, int number)
3588 char *q, buf1[20], c;
3589 int nd, len, percentd_found;
3601 while (isdigit(*p)) {
3602 nd = nd * 10 + *p++ - '0';
3605 } while (isdigit(c));
3614 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3616 if ((q - buf + len) > buf_size - 1)
3618 memcpy(q, buf1, len);
3626 if ((q - buf) < buf_size - 1)
3630 if (!percentd_found)
3639 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3643 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3645 for(i=0;i<size;i+=16) {
3652 PRINT(" %02x", buf[i+j]);
3657 for(j=0;j<len;j++) {
3659 if (c < ' ' || c > '~')
3668 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3670 hex_dump_internal(NULL, f, 0, buf, size);
3673 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3675 hex_dump_internal(avcl, NULL, level, buf, size);
3678 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3681 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3682 PRINT("stream #%d:\n", pkt->stream_index);
3683 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3684 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3685 /* DTS is _always_ valid after av_read_frame() */
3687 if (pkt->dts == AV_NOPTS_VALUE)
3690 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3691 /* PTS may not be known if B-frames are present. */
3693 if (pkt->pts == AV_NOPTS_VALUE)
3696 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3698 PRINT(" size=%d\n", pkt->size);
3701 av_hex_dump(f, pkt->data, pkt->size);
3705 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3707 AVRational tb = { 1, AV_TIME_BASE };
3708 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3712 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3714 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3718 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3720 AVRational tb = { 1, AV_TIME_BASE };
3721 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3725 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3728 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3731 void av_url_split(char *proto, int proto_size,
3732 char *authorization, int authorization_size,
3733 char *hostname, int hostname_size,
3735 char *path, int path_size,
3738 const char *p, *ls, *at, *col, *brk;
3740 if (port_ptr) *port_ptr = -1;
3741 if (proto_size > 0) proto[0] = 0;
3742 if (authorization_size > 0) authorization[0] = 0;
3743 if (hostname_size > 0) hostname[0] = 0;
3744 if (path_size > 0) path[0] = 0;
3746 /* parse protocol */
3747 if ((p = strchr(url, ':'))) {
3748 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3753 /* no protocol means plain filename */
3754 av_strlcpy(path, url, path_size);
3758 /* separate path from hostname */
3759 ls = strchr(p, '/');
3761 ls = strchr(p, '?');
3763 av_strlcpy(path, ls, path_size);
3765 ls = &p[strlen(p)]; // XXX
3767 /* the rest is hostname, use that to parse auth/port */
3769 /* authorization (user[:pass]@hostname) */
3770 if ((at = strchr(p, '@')) && at < ls) {
3771 av_strlcpy(authorization, p,
3772 FFMIN(authorization_size, at + 1 - p));
3773 p = at + 1; /* skip '@' */
3776 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3778 av_strlcpy(hostname, p + 1,
3779 FFMIN(hostname_size, brk - p));
3780 if (brk[1] == ':' && port_ptr)
3781 *port_ptr = atoi(brk + 2);
3782 } else if ((col = strchr(p, ':')) && col < ls) {
3783 av_strlcpy(hostname, p,
3784 FFMIN(col + 1 - p, hostname_size));
3785 if (port_ptr) *port_ptr = atoi(col + 1);
3787 av_strlcpy(hostname, p,
3788 FFMIN(ls + 1 - p, hostname_size));
3792 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3795 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3798 'C', 'D', 'E', 'F' };
3799 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3802 'c', 'd', 'e', 'f' };
3803 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3805 for(i = 0; i < s; i++) {
3806 buff[i * 2] = hex_table[src[i] >> 4];
3807 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3813 int ff_hex_to_data(uint8_t *data, const char *p)
3820 p += strspn(p, SPACE_CHARS);
3823 c = toupper((unsigned char) *p++);
3824 if (c >= '0' && c <= '9')
3826 else if (c >= 'A' && c <= 'F')
3841 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3842 unsigned int pts_num, unsigned int pts_den)
3845 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3846 if(new_tb.num != pts_num)
3847 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3849 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3851 if(new_tb.num <= 0 || new_tb.den <= 0) {
3852 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3855 s->time_base = new_tb;
3856 s->pts_wrap_bits = pts_wrap_bits;
3859 int ff_url_join(char *str, int size, const char *proto,
3860 const char *authorization, const char *hostname,
3861 int port, const char *fmt, ...)
3864 struct addrinfo hints, *ai;
3869 av_strlcatf(str, size, "%s://", proto);
3870 if (authorization && authorization[0])
3871 av_strlcatf(str, size, "%s@", authorization);
3872 #if CONFIG_NETWORK && defined(AF_INET6)
3873 /* Determine if hostname is a numerical IPv6 address,
3874 * properly escape it within [] in that case. */
3875 memset(&hints, 0, sizeof(hints));
3876 hints.ai_flags = AI_NUMERICHOST;
3877 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3878 if (ai->ai_family == AF_INET6) {
3879 av_strlcat(str, "[", size);
3880 av_strlcat(str, hostname, size);
3881 av_strlcat(str, "]", size);
3883 av_strlcat(str, hostname, size);
3888 /* Not an IPv6 address, just output the plain string. */
3889 av_strlcat(str, hostname, size);
3892 av_strlcatf(str, size, ":%d", port);
3895 int len = strlen(str);
3898 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3904 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3905 AVFormatContext *src)
3910 local_pkt.stream_index = dst_stream;
3911 if (pkt->pts != AV_NOPTS_VALUE)
3912 local_pkt.pts = av_rescale_q(pkt->pts,
3913 src->streams[pkt->stream_index]->time_base,
3914 dst->streams[dst_stream]->time_base);
3915 if (pkt->dts != AV_NOPTS_VALUE)
3916 local_pkt.dts = av_rescale_q(pkt->dts,
3917 src->streams[pkt->stream_index]->time_base,
3918 dst->streams[dst_stream]->time_base);
3919 return av_write_frame(dst, &local_pkt);
3922 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3925 const char *ptr = str;
3927 /* Parse key=value pairs. */
3930 char *dest = NULL, *dest_end;
3931 int key_len, dest_len = 0;
3933 /* Skip whitespace and potential commas. */
3934 while (*ptr && (isspace(*ptr) || *ptr == ','))
3941 if (!(ptr = strchr(key, '=')))
3944 key_len = ptr - key;
3946 callback_get_buf(context, key, key_len, &dest, &dest_len);
3947 dest_end = dest + dest_len - 1;
3951 while (*ptr && *ptr != '\"') {
3955 if (dest && dest < dest_end)
3959 if (dest && dest < dest_end)
3967 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3968 if (dest && dest < dest_end)
3976 int ff_find_stream_index(AVFormatContext *s, int id)
3979 for (i = 0; i < s->nb_streams; i++) {
3980 if (s->streams[i]->id == id)
3986 void ff_make_absolute_url(char *buf, int size, const char *base,
3990 /* Absolute path, relative to the current server */
3991 if (base && strstr(base, "://") && rel[0] == '/') {
3993 av_strlcpy(buf, base, size);
3994 sep = strstr(buf, "://");
3997 sep = strchr(sep, '/');
4001 av_strlcat(buf, rel, size);
4004 /* If rel actually is an absolute url, just copy it */
4005 if (!base || strstr(rel, "://") || rel[0] == '/') {
4006 av_strlcpy(buf, rel, size);
4010 av_strlcpy(buf, base, size);
4011 /* Remove the file name from the base url */
4012 sep = strrchr(buf, '/');
4017 while (av_strstart(rel, "../", NULL) && sep) {
4018 /* Remove the path delimiter at the end */
4020 sep = strrchr(buf, '/');
4021 /* If the next directory name to pop off is "..", break here */
4022 if (!strcmp(sep ? &sep[1] : buf, "..")) {
4023 /* Readd the slash we just removed */
4024 av_strlcat(buf, "/", size);
4027 /* Cut off the directory name */
4034 av_strlcat(buf, rel, size);
4037 int64_t ff_iso8601_to_unix_time(const char *datestr)
4040 struct tm time = {0};
4041 strptime(datestr, "%Y - %m - %dT%T", &time);
4042 return mktime(&time);
4044 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
4045 "the date string.\n");
4050 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
4053 if (ofmt->query_codec)
4054 return ofmt->query_codec(codec_id, std_compliance);
4055 else if (ofmt->codec_tag)
4056 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
4057 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
4058 codec_id == ofmt->subtitle_codec)
4061 return AVERROR_PATCHWELCOME;