2 * Various utilities for ffmpeg system
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
22 #include "allformats.h"
29 * @file libavformat/utils.c
30 * Various utility functions for using ffmpeg library.
33 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
34 static void av_frac_add(AVFrac *f, int64_t incr);
35 static void av_frac_set(AVFrac *f, int64_t val);
37 /** head of registered input format linked list. */
38 AVInputFormat *first_iformat = NULL;
39 /** head of registered output format linked list. */
40 AVOutputFormat *first_oformat = NULL;
42 void av_register_input_format(AVInputFormat *format)
46 while (*p != NULL) p = &(*p)->next;
51 void av_register_output_format(AVOutputFormat *format)
55 while (*p != NULL) p = &(*p)->next;
60 int match_ext(const char *filename, const char *extensions)
68 ext = strrchr(filename, '.');
74 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
77 if (!strcasecmp(ext1, ext))
87 AVOutputFormat *guess_format(const char *short_name, const char *filename,
88 const char *mime_type)
90 AVOutputFormat *fmt, *fmt_found;
93 /* specific test for image sequences */
94 #ifdef CONFIG_IMAGE2_MUXER
95 if (!short_name && filename &&
96 av_filename_number_test(filename) &&
97 av_guess_image2_codec(filename) != CODEC_ID_NONE) {
98 return guess_format("image2", NULL, NULL);
101 /* find the proper file type */
105 while (fmt != NULL) {
107 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
109 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
111 if (filename && fmt->extensions &&
112 match_ext(filename, fmt->extensions)) {
115 if (score > score_max) {
124 AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
125 const char *mime_type)
127 AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
130 AVOutputFormat *stream_fmt;
131 char stream_format_name[64];
133 snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
134 stream_fmt = guess_format(stream_format_name, NULL, NULL);
144 * Guesses the codec id based upon muxer and filename.
146 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
147 const char *filename, const char *mime_type, enum CodecType type){
148 if(type == CODEC_TYPE_VIDEO){
149 enum CodecID codec_id= CODEC_ID_NONE;
151 #ifdef CONFIG_IMAGE2_MUXER
152 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
153 codec_id= av_guess_image2_codec(filename);
156 if(codec_id == CODEC_ID_NONE)
157 codec_id= fmt->video_codec;
159 }else if(type == CODEC_TYPE_AUDIO)
160 return fmt->audio_codec;
162 return CODEC_ID_NONE;
166 * finds AVInputFormat based on input format's short name.
168 AVInputFormat *av_find_input_format(const char *short_name)
171 for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
172 if (!strcmp(fmt->name, short_name))
178 /* memory handling */
181 * Default packet destructor.
183 void av_destruct_packet(AVPacket *pkt)
186 pkt->data = NULL; pkt->size = 0;
190 * Allocate the payload of a packet and intialized its fields to default values.
193 * @param size wanted payload size
194 * @return 0 if OK. AVERROR_xxx otherwise.
196 int av_new_packet(AVPacket *pkt, int size)
199 if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
200 return AVERROR_NOMEM;
201 data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
203 return AVERROR_NOMEM;
204 memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
209 pkt->destruct = av_destruct_packet;
214 * Allocate and read the payload of a packet and intialized its fields to default values.
217 * @param size wanted payload size
218 * @return >0 (read size) if OK. AVERROR_xxx otherwise.
220 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
222 int ret= av_new_packet(pkt, size);
227 pkt->pos= url_ftell(s);
229 ret= get_buffer(s, pkt->data, size);
238 /* This is a hack - the packet memory allocation stuff is broken. The
239 packet is allocated if it was not really allocated */
240 int av_dup_packet(AVPacket *pkt)
242 if (pkt->destruct != av_destruct_packet) {
244 /* we duplicate the packet and don't forget to put the padding
246 if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
247 return AVERROR_NOMEM;
248 data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
250 return AVERROR_NOMEM;
252 memcpy(data, pkt->data, pkt->size);
253 memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
255 pkt->destruct = av_destruct_packet;
261 * Allocate the payload of a packet and intialized its fields to default values.
263 * @param filename possible numbered sequence string
264 * @return 1 if a valid numbered sequence string, 0 otherwise.
266 int av_filename_number_test(const char *filename)
269 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
275 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
277 AVInputFormat *fmt1, *fmt;
278 int score, score_max;
282 for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
283 if (!is_opened && !(fmt1->flags & AVFMT_NOFILE))
286 if (fmt1->read_probe) {
287 score = fmt1->read_probe(pd);
288 } else if (fmt1->extensions) {
289 if (match_ext(pd->filename, fmt1->extensions)) {
293 if (score > score_max) {
301 /************************************************************/
302 /* input media file */
305 * Open a media file from an IO stream. 'fmt' must be specified.
307 static const char* format_to_name(void* ptr)
309 AVFormatContext* fc = (AVFormatContext*) ptr;
310 if(fc->iformat) return fc->iformat->name;
311 else if(fc->oformat) return fc->oformat->name;
315 #define OFFSET(x) offsetof(AVFormatContext,x)
316 #define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C
317 //these names are too long to be readable
318 #define E AV_OPT_FLAG_ENCODING_PARAM
319 #define D AV_OPT_FLAG_DECODING_PARAM
321 static const AVOption options[]={
322 {"probesize", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */
323 {"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
324 {"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
325 {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
326 {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
327 {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
328 {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
329 {"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
337 static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
339 #if LIBAVFORMAT_VERSION_INT >= ((51<<16)+(0<<8)+0)
342 void avformat_get_context_defaults(AVFormatContext *s){
343 memset(s, 0, sizeof(AVFormatContext));
345 s->av_class = &av_format_context_class;
347 av_opt_set_defaults(s);
350 AVFormatContext *av_alloc_format_context(void)
353 ic = av_malloc(sizeof(AVFormatContext));
355 avformat_get_context_defaults(ic);
356 ic->av_class = &av_format_context_class;
361 * Allocates all the structures needed to read an input stream.
362 * This does not open the needed codecs for decoding the stream[s].
364 int av_open_input_stream(AVFormatContext **ic_ptr,
365 ByteIOContext *pb, const char *filename,
366 AVInputFormat *fmt, AVFormatParameters *ap)
370 AVFormatParameters default_ap;
374 memset(ap, 0, sizeof(default_ap));
377 if(!ap->prealloced_context)
378 ic = av_alloc_format_context();
388 ic->duration = AV_NOPTS_VALUE;
389 ic->start_time = AV_NOPTS_VALUE;
390 pstrcpy(ic->filename, sizeof(ic->filename), filename);
392 /* allocate private data */
393 if (fmt->priv_data_size > 0) {
394 ic->priv_data = av_mallocz(fmt->priv_data_size);
395 if (!ic->priv_data) {
400 ic->priv_data = NULL;
403 err = ic->iformat->read_header(ic, ap);
407 if (pb && !ic->data_offset)
408 ic->data_offset = url_ftell(&ic->pb);
414 av_freep(&ic->priv_data);
421 /** Size of probe buffer, for guessing file type from file contents. */
422 #define PROBE_BUF_MIN 2048
423 #define PROBE_BUF_MAX (1<<20)
426 * Open a media file as input. The codec are not opened. Only the file
427 * header (if present) is read.
429 * @param ic_ptr the opened media file handle is put here
430 * @param filename filename to open.
431 * @param fmt if non NULL, force the file format to use
432 * @param buf_size optional buffer size (zero if default is OK)
433 * @param ap additionnal parameters needed when opening the file (NULL if default)
434 * @return 0 if OK. AVERROR_xxx otherwise.
436 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
439 AVFormatParameters *ap)
441 int err, must_open_file, file_opened, probe_size;
442 AVProbeData probe_data, *pd = &probe_data;
443 ByteIOContext pb1, *pb = &pb1;
448 pd->filename = filename;
453 /* guess format if no file can be opened */
454 fmt = av_probe_input_format(pd, 0);
457 /* do not open file if the format does not need it. XXX: specific
458 hack needed to handle RTSP/TCP */
460 if (fmt && (fmt->flags & AVFMT_NOFILE)) {
462 pb= NULL; //FIXME this or memset(pb, 0, sizeof(ByteIOContext)); otherwise its uninitalized
465 if (!fmt || must_open_file) {
466 /* if no file needed do not try to open one */
467 if (url_fopen(pb, filename, URL_RDONLY) < 0) {
473 url_setbufsize(pb, buf_size);
476 for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){
477 /* read probe data */
478 pd->buf= av_realloc(pd->buf, probe_size);
479 pd->buf_size = get_buffer(pb, pd->buf, probe_size);
480 if (url_fseek(pb, 0, SEEK_SET) == (offset_t)-EPIPE) {
482 if (url_fopen(pb, filename, URL_RDONLY) < 0) {
488 /* guess file format */
489 fmt = av_probe_input_format(pd, 1);
494 /* if still no format found, error */
500 /* XXX: suppress this hack for redirectors */
501 #ifdef CONFIG_NETWORK
502 if (fmt == &redir_demuxer) {
503 err = redir_open(ic_ptr, pb);
509 /* check filename in case of an image number is expected */
510 if (fmt->flags & AVFMT_NEEDNUMBER) {
511 if (!av_filename_number_test(filename)) {
512 err = AVERROR_NUMEXPECTED;
516 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
529 /*******************************************************/
532 * Read a transport packet from a media file.
534 * This function is absolete and should never be used.
535 * Use av_read_frame() instead.
537 * @param s media file handle
538 * @param pkt is filled
539 * @return 0 if OK. AVERROR_xxx if error.
541 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
543 return s->iformat->read_packet(s, pkt);
546 /**********************************************************/
549 * Get the number of samples of an audio frame. Return (-1) if error.
551 static int get_audio_frame_size(AVCodecContext *enc, int size)
555 if (enc->frame_size <= 1) {
556 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
558 if (bits_per_sample) {
559 if (enc->channels == 0)
561 frame_size = (size << 3) / (bits_per_sample * enc->channels);
563 /* used for example by ADPCM codecs */
564 if (enc->bit_rate == 0)
566 frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate;
569 frame_size = enc->frame_size;
576 * Return the frame duration in seconds, return 0 if not available.
578 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
579 AVCodecParserContext *pc, AVPacket *pkt)
585 switch(st->codec->codec_type) {
586 case CODEC_TYPE_VIDEO:
587 if(st->time_base.num*1000LL > st->time_base.den){
588 *pnum = st->time_base.num;
589 *pden = st->time_base.den;
590 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
591 *pnum = st->codec->time_base.num;
592 *pden = st->codec->time_base.den;
593 if (pc && pc->repeat_pict) {
595 *pnum = (*pnum) * (2 + pc->repeat_pict);
599 case CODEC_TYPE_AUDIO:
600 frame_size = get_audio_frame_size(st->codec, pkt->size);
604 *pden = st->codec->sample_rate;
611 static int is_intra_only(AVCodecContext *enc){
612 if(enc->codec_type == CODEC_TYPE_AUDIO){
614 }else if(enc->codec_type == CODEC_TYPE_VIDEO){
615 switch(enc->codec_id){
617 case CODEC_ID_MJPEGB:
619 case CODEC_ID_RAWVIDEO:
620 case CODEC_ID_DVVIDEO:
621 case CODEC_ID_HUFFYUV:
622 case CODEC_ID_FFVHUFF:
633 static int64_t lsb2full(int64_t lsb, int64_t last_ts, int lsb_bits){
634 int64_t mask = lsb_bits < 64 ? (1LL<<lsb_bits)-1 : -1LL;
635 int64_t delta= last_ts - mask/2;
636 return ((lsb - delta)&mask) + delta;
639 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
640 AVCodecParserContext *pc, AVPacket *pkt)
642 int num, den, presentation_delayed;
643 /* handle wrapping */
644 if(st->cur_dts != AV_NOPTS_VALUE){
645 if(pkt->pts != AV_NOPTS_VALUE)
646 pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits);
647 if(pkt->dts != AV_NOPTS_VALUE)
648 pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits);
651 if (pkt->duration == 0) {
652 compute_frame_duration(&num, &den, st, pc, pkt);
654 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
658 if(is_intra_only(st->codec))
659 pkt->flags |= PKT_FLAG_KEY;
661 /* do we have a video B frame ? */
662 presentation_delayed = 0;
663 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
664 /* XXX: need has_b_frame, but cannot get it if the codec is
666 if (( st->codec->codec_id == CODEC_ID_H264
667 || st->codec->has_b_frames) &&
668 pc && pc->pict_type != FF_B_TYPE)
669 presentation_delayed = 1;
670 /* this may be redundant, but it shouldnt hurt */
671 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
672 presentation_delayed = 1;
675 if(st->cur_dts == AV_NOPTS_VALUE){
676 if(presentation_delayed) st->cur_dts = -pkt->duration;
677 else st->cur_dts = 0;
680 // 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);
681 /* interpolate PTS and DTS if they are not present */
682 if (presentation_delayed) {
683 /* DTS = decompression time stamp */
684 /* PTS = presentation time stamp */
685 if (pkt->dts == AV_NOPTS_VALUE) {
686 /* if we know the last pts, use it */
687 if(st->last_IP_pts != AV_NOPTS_VALUE)
688 st->cur_dts = pkt->dts = st->last_IP_pts;
690 pkt->dts = st->cur_dts;
692 st->cur_dts = pkt->dts;
694 /* this is tricky: the dts must be incremented by the duration
695 of the frame we are displaying, i.e. the last I or P frame */
696 if (st->last_IP_duration == 0)
697 st->cur_dts += pkt->duration;
699 st->cur_dts += st->last_IP_duration;
700 st->last_IP_duration = pkt->duration;
701 st->last_IP_pts= pkt->pts;
702 /* cannot compute PTS if not present (we can compute it only
703 by knowing the futur */
704 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
705 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
706 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
707 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
708 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
709 pkt->pts += pkt->duration;
710 // 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);
714 /* presentation is not delayed : PTS and DTS are the same */
715 if (pkt->pts == AV_NOPTS_VALUE) {
716 if (pkt->dts == AV_NOPTS_VALUE) {
717 pkt->pts = st->cur_dts;
718 pkt->dts = st->cur_dts;
721 st->cur_dts = pkt->dts;
725 st->cur_dts = pkt->pts;
728 st->cur_dts += pkt->duration;
730 // av_log(NULL, AV_LOG_DEBUG, "OUTdelayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts);
735 /* key frame computation */
736 switch(st->codec->codec_type) {
737 case CODEC_TYPE_VIDEO:
738 if (pc->pict_type == FF_I_TYPE)
739 pkt->flags |= PKT_FLAG_KEY;
741 case CODEC_TYPE_AUDIO:
742 pkt->flags |= PKT_FLAG_KEY;
750 void av_destruct_packet_nofree(AVPacket *pkt)
752 pkt->data = NULL; pkt->size = 0;
755 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
761 /* select current input stream component */
764 if (!st->need_parsing || !st->parser) {
765 /* no parsing needed: we just output the packet as is */
766 /* raw data support */
768 compute_pkt_fields(s, st, NULL, pkt);
771 } else if (s->cur_len > 0 && st->discard < AVDISCARD_ALL) {
772 len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size,
773 s->cur_ptr, s->cur_len,
774 s->cur_pkt.pts, s->cur_pkt.dts);
775 s->cur_pkt.pts = AV_NOPTS_VALUE;
776 s->cur_pkt.dts = AV_NOPTS_VALUE;
777 /* increment read pointer */
781 /* return packet if any */
785 pkt->stream_index = st->index;
786 pkt->pts = st->parser->pts;
787 pkt->dts = st->parser->dts;
788 pkt->destruct = av_destruct_packet_nofree;
789 compute_pkt_fields(s, st, st->parser, pkt);
794 av_free_packet(&s->cur_pkt);
798 /* read next packet */
799 ret = av_read_packet(s, &s->cur_pkt);
803 /* return the last frames, if any */
804 for(i = 0; i < s->nb_streams; i++) {
806 if (st->parser && st->need_parsing) {
807 av_parser_parse(st->parser, st->codec,
808 &pkt->data, &pkt->size,
810 AV_NOPTS_VALUE, AV_NOPTS_VALUE);
815 /* no more packets: really terminates parsing */
819 st = s->streams[s->cur_pkt.stream_index];
820 if(st->codec->debug & FF_DEBUG_PTS)
821 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
822 s->cur_pkt.stream_index,
828 s->cur_ptr = s->cur_pkt.data;
829 s->cur_len = s->cur_pkt.size;
830 if (st->need_parsing && !st->parser) {
831 st->parser = av_parser_init(st->codec->codec_id);
833 /* no parser available : just output the raw packets */
834 st->need_parsing = 0;
835 }else if(st->need_parsing == 2){
836 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
841 if(st->codec->debug & FF_DEBUG_PTS)
842 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
852 * Return the next frame of a stream.
854 * The returned packet is valid
855 * until the next av_read_frame() or until av_close_input_file() and
856 * must be freed with av_free_packet. For video, the packet contains
857 * exactly one frame. For audio, it contains an integer number of
858 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
859 * data). If the audio frames have a variable size (e.g. MPEG audio),
860 * then it contains one frame.
862 * pkt->pts, pkt->dts and pkt->duration are always set to correct
863 * values in AV_TIME_BASE unit (and guessed if the format cannot
864 * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
865 * has B frames, so it is better to rely on pkt->dts if you do not
866 * decompress the payload.
868 * @return 0 if OK, < 0 if error or end of file.
870 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
874 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
877 pktl = s->packet_buffer;
879 AVPacket *next_pkt= &pktl->pkt;
881 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
882 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
883 if( pktl->pkt.stream_index == next_pkt->stream_index
884 && next_pkt->dts < pktl->pkt.dts
885 && pktl->pkt.pts != pktl->pkt.dts //not b frame
886 /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
887 next_pkt->pts= pktl->pkt.dts;
891 pktl = s->packet_buffer;
894 if( next_pkt->pts != AV_NOPTS_VALUE
895 || next_pkt->dts == AV_NOPTS_VALUE
897 /* read packet from packet buffer, if there is data */
899 s->packet_buffer = pktl->next;
905 AVPacketList **plast_pktl= &s->packet_buffer;
906 int ret= av_read_frame_internal(s, pkt);
908 if(pktl && ret != -EAGAIN){
915 /* duplicate the packet */
916 if (av_dup_packet(pkt) < 0)
917 return AVERROR_NOMEM;
919 while(*plast_pktl) plast_pktl= &(*plast_pktl)->next; //FIXME maybe maintain pointer to the last?
921 pktl = av_mallocz(sizeof(AVPacketList));
923 return AVERROR_NOMEM;
925 /* add the packet in the buffered packet list */
929 assert(!s->packet_buffer);
930 return av_read_frame_internal(s, pkt);
935 /* XXX: suppress the packet queue */
936 static void flush_packet_queue(AVFormatContext *s)
941 pktl = s->packet_buffer;
944 s->packet_buffer = pktl->next;
945 av_free_packet(&pktl->pkt);
950 /*******************************************************/
953 int av_find_default_stream_index(AVFormatContext *s)
958 if (s->nb_streams <= 0)
960 for(i = 0; i < s->nb_streams; i++) {
962 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
970 * Flush the frame reader.
972 static void av_read_frame_flush(AVFormatContext *s)
977 flush_packet_queue(s);
979 /* free previous packet */
981 if (s->cur_st->parser)
982 av_free_packet(&s->cur_pkt);
989 /* for each stream, reset read state */
990 for(i = 0; i < s->nb_streams; i++) {
994 av_parser_close(st->parser);
997 st->last_IP_pts = AV_NOPTS_VALUE;
998 st->cur_dts = 0; /* we set the current DTS to an unspecified origin */
1003 * Updates cur_dts of all streams based on given timestamp and AVStream.
1005 * Stream ref_st unchanged, others set cur_dts in their native timebase
1006 * only needed for timestamp wrapping or if (dts not set and pts!=dts)
1007 * @param timestamp new dts expressed in time_base of param ref_st
1008 * @param ref_st reference stream giving time_base of param timestamp
1010 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1013 for(i = 0; i < s->nb_streams; i++) {
1014 AVStream *st = s->streams[i];
1016 st->cur_dts = av_rescale(timestamp,
1017 st->time_base.den * (int64_t)ref_st->time_base.num,
1018 st->time_base.num * (int64_t)ref_st->time_base.den);
1023 * Add a index entry into a sorted list updateing if it is already there.
1025 * @param timestamp timestamp in the timebase of the given stream
1027 int av_add_index_entry(AVStream *st,
1028 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1030 AVIndexEntry *entries, *ie;
1033 if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1036 entries = av_fast_realloc(st->index_entries,
1037 &st->index_entries_allocated_size,
1038 (st->nb_index_entries + 1) *
1039 sizeof(AVIndexEntry));
1043 st->index_entries= entries;
1045 index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
1048 index= st->nb_index_entries++;
1049 ie= &entries[index];
1050 assert(index==0 || ie[-1].timestamp < timestamp);
1052 ie= &entries[index];
1053 if(ie->timestamp != timestamp){
1054 if(ie->timestamp <= timestamp)
1056 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
1057 st->nb_index_entries++;
1058 }else if(ie->pos == pos && distance < ie->min_distance) //dont reduce the distance
1059 distance= ie->min_distance;
1063 ie->timestamp = timestamp;
1064 ie->min_distance= distance;
1072 * build an index for raw streams using a parser.
1074 static void av_build_index_raw(AVFormatContext *s)
1076 AVPacket pkt1, *pkt = &pkt1;
1081 av_read_frame_flush(s);
1082 url_fseek(&s->pb, s->data_offset, SEEK_SET);
1085 ret = av_read_frame(s, pkt);
1088 if (pkt->stream_index == 0 && st->parser &&
1089 (pkt->flags & PKT_FLAG_KEY)) {
1090 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1091 0, 0, AVINDEX_KEYFRAME);
1093 av_free_packet(pkt);
1098 * Returns TRUE if we deal with a raw stream.
1100 * Raw codec data and parsing needed.
1102 static int is_raw_stream(AVFormatContext *s)
1106 if (s->nb_streams != 1)
1109 if (!st->need_parsing)
1115 * Gets the index for a specific timestamp.
1116 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to
1117 * the timestamp which is <= the requested one, if backward is 0
1118 * then it will be >=
1119 * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
1120 * @return < 0 if no such timestamp could be found
1122 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1125 AVIndexEntry *entries= st->index_entries;
1126 int nb_entries= st->nb_index_entries;
1135 timestamp = entries[m].timestamp;
1136 if(timestamp >= wanted_timestamp)
1138 if(timestamp <= wanted_timestamp)
1141 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1143 if(!(flags & AVSEEK_FLAG_ANY)){
1144 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1145 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1157 * Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
1158 * this isnt supposed to be called directly by a user application, but by demuxers
1159 * @param target_ts target timestamp in the time base of the given stream
1160 * @param stream_index stream number
1162 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1163 AVInputFormat *avif= s->iformat;
1164 int64_t pos_min, pos_max, pos, pos_limit;
1165 int64_t ts_min, ts_max, ts;
1169 if (stream_index < 0)
1173 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1177 ts_min= AV_NOPTS_VALUE;
1178 pos_limit= -1; //gcc falsely says it may be uninitalized
1180 st= s->streams[stream_index];
1181 if(st->index_entries){
1184 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()
1185 index= FFMAX(index, 0);
1186 e= &st->index_entries[index];
1188 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1190 ts_min= e->timestamp;
1192 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1199 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1200 assert(index < st->nb_index_entries);
1202 e= &st->index_entries[index];
1203 assert(e->timestamp >= target_ts);
1205 ts_max= e->timestamp;
1206 pos_limit= pos_max - e->min_distance;
1208 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1209 pos_max,pos_limit, ts_max);
1214 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1219 url_fseek(&s->pb, pos, SEEK_SET);
1221 av_update_cur_dts(s, st, ts);
1227 * Does a binary search using read_timestamp().
1228 * this isnt supposed to be called directly by a user application, but by demuxers
1229 * @param target_ts target timestamp in the time base of the given stream
1230 * @param stream_index stream number
1232 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 )){
1234 int64_t start_pos, filesize;
1238 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1241 if(ts_min == AV_NOPTS_VALUE){
1242 pos_min = s->data_offset;
1243 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1244 if (ts_min == AV_NOPTS_VALUE)
1248 if(ts_max == AV_NOPTS_VALUE){
1250 filesize = url_fsize(&s->pb);
1251 pos_max = filesize - 1;
1254 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1256 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1257 if (ts_max == AV_NOPTS_VALUE)
1261 int64_t tmp_pos= pos_max + 1;
1262 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1263 if(tmp_ts == AV_NOPTS_VALUE)
1267 if(tmp_pos >= filesize)
1273 if(ts_min > ts_max){
1275 }else if(ts_min == ts_max){
1280 while (pos_min < pos_limit) {
1282 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1286 assert(pos_limit <= pos_max);
1289 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1290 // interpolate position (better than dichotomy)
1291 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1292 + pos_min - approximate_keyframe_distance;
1293 }else if(no_change==1){
1294 // bisection, if interpolation failed to change min or max pos last time
1295 pos = (pos_min + pos_limit)>>1;
1297 // linear search if bisection failed, can only happen if there are very few or no keframes between min/max
1302 else if(pos > pos_limit)
1306 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1312 av_log(s, AV_LOG_DEBUG, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, pos_limit, start_pos, no_change);
1314 assert(ts != AV_NOPTS_VALUE);
1315 if (target_ts <= ts) {
1316 pos_limit = start_pos - 1;
1320 if (target_ts >= ts) {
1326 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1327 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1330 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1332 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1333 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1334 pos, ts_min, target_ts, ts_max);
1340 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1341 int64_t pos_min, pos_max;
1345 if (stream_index < 0)
1348 st= s->streams[stream_index];
1351 pos_min = s->data_offset;
1352 pos_max = url_fsize(&s->pb) - 1;
1354 if (pos < pos_min) pos= pos_min;
1355 else if(pos > pos_max) pos= pos_max;
1357 url_fseek(&s->pb, pos, SEEK_SET);
1360 av_update_cur_dts(s, st, ts);
1365 static int av_seek_frame_generic(AVFormatContext *s,
1366 int stream_index, int64_t timestamp, int flags)
1372 if (!s->index_built) {
1373 if (is_raw_stream(s)) {
1374 av_build_index_raw(s);
1381 st = s->streams[stream_index];
1382 index = av_index_search_timestamp(st, timestamp, flags);
1386 /* now we have found the index, we can seek */
1387 ie = &st->index_entries[index];
1388 av_read_frame_flush(s);
1389 url_fseek(&s->pb, ie->pos, SEEK_SET);
1391 av_update_cur_dts(s, st, ie->timestamp);
1397 * Seek to the key frame at timestamp.
1398 * 'timestamp' in 'stream_index'.
1399 * @param stream_index If stream_index is (-1), a default
1400 * stream is selected, and timestamp is automatically converted
1401 * from AV_TIME_BASE units to the stream specific time_base.
1402 * @param timestamp timestamp in AVStream.time_base units
1403 * or if there is no stream specified then in AV_TIME_BASE units
1404 * @param flags flags which select direction and seeking mode
1405 * @return >= 0 on success
1407 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1412 av_read_frame_flush(s);
1414 if(flags & AVSEEK_FLAG_BYTE)
1415 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1417 if(stream_index < 0){
1418 stream_index= av_find_default_stream_index(s);
1419 if(stream_index < 0)
1422 st= s->streams[stream_index];
1423 /* timestamp for default must be expressed in AV_TIME_BASE units */
1424 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1426 st= s->streams[stream_index];
1428 /* first, we try the format specific seek */
1429 if (s->iformat->read_seek)
1430 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1437 if(s->iformat->read_timestamp)
1438 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1440 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1443 /*******************************************************/
1446 * Returns TRUE if the stream has accurate timings in any stream.
1448 * @return TRUE if the stream has accurate timings for at least one component.
1450 static int av_has_timings(AVFormatContext *ic)
1455 for(i = 0;i < ic->nb_streams; i++) {
1456 st = ic->streams[i];
1457 if (st->start_time != AV_NOPTS_VALUE &&
1458 st->duration != AV_NOPTS_VALUE)
1465 * Estimate the stream timings from the one of each components.
1467 * Also computes the global bitrate if possible.
1469 static void av_update_stream_timings(AVFormatContext *ic)
1471 int64_t start_time, start_time1, end_time, end_time1;
1475 start_time = MAXINT64;
1476 end_time = MININT64;
1477 for(i = 0;i < ic->nb_streams; i++) {
1478 st = ic->streams[i];
1479 if (st->start_time != AV_NOPTS_VALUE) {
1480 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1481 if (start_time1 < start_time)
1482 start_time = start_time1;
1483 if (st->duration != AV_NOPTS_VALUE) {
1484 end_time1 = start_time1
1485 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1486 if (end_time1 > end_time)
1487 end_time = end_time1;
1491 if (start_time != MAXINT64) {
1492 ic->start_time = start_time;
1493 if (end_time != MININT64) {
1494 ic->duration = end_time - start_time;
1495 if (ic->file_size > 0) {
1496 /* compute the bit rate */
1497 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1498 (double)ic->duration;
1505 static void fill_all_stream_timings(AVFormatContext *ic)
1510 av_update_stream_timings(ic);
1511 for(i = 0;i < ic->nb_streams; i++) {
1512 st = ic->streams[i];
1513 if (st->start_time == AV_NOPTS_VALUE) {
1514 if(ic->start_time != AV_NOPTS_VALUE)
1515 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1516 if(ic->duration != AV_NOPTS_VALUE)
1517 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1522 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1524 int64_t filesize, duration;
1528 /* if bit_rate is already set, we believe it */
1529 if (ic->bit_rate == 0) {
1531 for(i=0;i<ic->nb_streams;i++) {
1532 st = ic->streams[i];
1533 bit_rate += st->codec->bit_rate;
1535 ic->bit_rate = bit_rate;
1538 /* if duration is already set, we believe it */
1539 if (ic->duration == AV_NOPTS_VALUE &&
1540 ic->bit_rate != 0 &&
1541 ic->file_size != 0) {
1542 filesize = ic->file_size;
1544 for(i = 0; i < ic->nb_streams; i++) {
1545 st = ic->streams[i];
1546 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1547 if (st->start_time == AV_NOPTS_VALUE ||
1548 st->duration == AV_NOPTS_VALUE) {
1550 st->duration = duration;
1557 #define DURATION_MAX_READ_SIZE 250000
1559 /* only usable for MPEG-PS streams */
1560 static void av_estimate_timings_from_pts(AVFormatContext *ic)
1562 AVPacket pkt1, *pkt = &pkt1;
1564 int read_size, i, ret;
1566 int64_t filesize, offset, duration;
1568 /* free previous packet */
1569 if (ic->cur_st && ic->cur_st->parser)
1570 av_free_packet(&ic->cur_pkt);
1573 /* flush packet queue */
1574 flush_packet_queue(ic);
1576 for(i=0;i<ic->nb_streams;i++) {
1577 st = ic->streams[i];
1579 av_parser_close(st->parser);
1584 /* we read the first packets to get the first PTS (not fully
1585 accurate, but it is enough now) */
1586 url_fseek(&ic->pb, 0, SEEK_SET);
1589 if (read_size >= DURATION_MAX_READ_SIZE)
1591 /* if all info is available, we can stop */
1592 for(i = 0;i < ic->nb_streams; i++) {
1593 st = ic->streams[i];
1594 if (st->start_time == AV_NOPTS_VALUE)
1597 if (i == ic->nb_streams)
1600 ret = av_read_packet(ic, pkt);
1603 read_size += pkt->size;
1604 st = ic->streams[pkt->stream_index];
1605 if (pkt->pts != AV_NOPTS_VALUE) {
1606 if (st->start_time == AV_NOPTS_VALUE)
1607 st->start_time = pkt->pts;
1609 av_free_packet(pkt);
1612 /* estimate the end time (duration) */
1613 /* XXX: may need to support wrapping */
1614 filesize = ic->file_size;
1615 offset = filesize - DURATION_MAX_READ_SIZE;
1619 url_fseek(&ic->pb, offset, SEEK_SET);
1622 if (read_size >= DURATION_MAX_READ_SIZE)
1624 /* if all info is available, we can stop */
1625 for(i = 0;i < ic->nb_streams; i++) {
1626 st = ic->streams[i];
1627 if (st->duration == AV_NOPTS_VALUE)
1630 if (i == ic->nb_streams)
1633 ret = av_read_packet(ic, pkt);
1636 read_size += pkt->size;
1637 st = ic->streams[pkt->stream_index];
1638 if (pkt->pts != AV_NOPTS_VALUE) {
1639 end_time = pkt->pts;
1640 duration = end_time - st->start_time;
1642 if (st->duration == AV_NOPTS_VALUE ||
1643 st->duration < duration)
1644 st->duration = duration;
1647 av_free_packet(pkt);
1650 fill_all_stream_timings(ic);
1652 url_fseek(&ic->pb, 0, SEEK_SET);
1655 static void av_estimate_timings(AVFormatContext *ic)
1659 /* get the file size, if possible */
1660 if (ic->iformat->flags & AVFMT_NOFILE) {
1663 file_size = url_fsize(&ic->pb);
1667 ic->file_size = file_size;
1669 if ((!strcmp(ic->iformat->name, "mpeg") ||
1670 !strcmp(ic->iformat->name, "mpegts")) &&
1671 file_size && !ic->pb.is_streamed) {
1672 /* get accurate estimate from the PTSes */
1673 av_estimate_timings_from_pts(ic);
1674 } else if (av_has_timings(ic)) {
1675 /* at least one components has timings - we use them for all
1677 fill_all_stream_timings(ic);
1679 /* less precise: use bit rate info */
1680 av_estimate_timings_from_bit_rate(ic);
1682 av_update_stream_timings(ic);
1688 for(i = 0;i < ic->nb_streams; i++) {
1689 st = ic->streams[i];
1690 printf("%d: start_time: %0.3f duration: %0.3f\n",
1691 i, (double)st->start_time / AV_TIME_BASE,
1692 (double)st->duration / AV_TIME_BASE);
1694 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1695 (double)ic->start_time / AV_TIME_BASE,
1696 (double)ic->duration / AV_TIME_BASE,
1697 ic->bit_rate / 1000);
1702 static int has_codec_parameters(AVCodecContext *enc)
1705 switch(enc->codec_type) {
1706 case CODEC_TYPE_AUDIO:
1707 val = enc->sample_rate;
1709 case CODEC_TYPE_VIDEO:
1710 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
1719 static int try_decode_frame(AVStream *st, const uint8_t *data, int size)
1723 int got_picture, ret=0;
1726 if(!st->codec->codec){
1727 codec = avcodec_find_decoder(st->codec->codec_id);
1730 ret = avcodec_open(st->codec, codec);
1735 if(!has_codec_parameters(st->codec)){
1736 switch(st->codec->codec_type) {
1737 case CODEC_TYPE_VIDEO:
1738 ret = avcodec_decode_video(st->codec, &picture,
1739 &got_picture, (uint8_t *)data, size);
1741 case CODEC_TYPE_AUDIO:
1742 samples = av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
1745 ret = avcodec_decode_audio(st->codec, samples,
1746 &got_picture, (uint8_t *)data, size);
1757 /* absolute maximum size we read until we abort */
1758 #define MAX_READ_SIZE 5000000
1760 /* maximum duration until we stop analysing the stream */
1761 #define MAX_STREAM_DURATION ((int)(AV_TIME_BASE * 3.0))
1764 * Read the beginning of a media file to get stream information. This
1765 * is useful for file formats with no headers such as MPEG. This
1766 * function also compute the real frame rate in case of mpeg2 repeat
1769 * @param ic media file handle
1770 * @return >=0 if OK. AVERROR_xxx if error.
1771 * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need
1773 int av_find_stream_info(AVFormatContext *ic)
1775 int i, count, ret, read_size, j;
1777 AVPacket pkt1, *pkt;
1778 AVPacketList *pktl=NULL, **ppktl;
1779 int64_t last_dts[MAX_STREAMS];
1780 int64_t duration_sum[MAX_STREAMS];
1781 int duration_count[MAX_STREAMS]={0};
1783 for(i=0;i<ic->nb_streams;i++) {
1784 st = ic->streams[i];
1785 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
1786 /* if(!st->time_base.num)
1788 if(!st->codec->time_base.num)
1789 st->codec->time_base= st->time_base;
1791 //only for the split stuff
1793 st->parser = av_parser_init(st->codec->codec_id);
1794 if(st->need_parsing == 2 && st->parser){
1795 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1800 for(i=0;i<MAX_STREAMS;i++){
1801 last_dts[i]= AV_NOPTS_VALUE;
1802 duration_sum[i]= INT64_MAX;
1807 ppktl = &ic->packet_buffer;
1809 /* check if one codec still needs to be handled */
1810 for(i=0;i<ic->nb_streams;i++) {
1811 st = ic->streams[i];
1812 if (!has_codec_parameters(st->codec))
1814 /* variable fps and no guess at the real fps */
1815 if( st->codec->time_base.den >= 101LL*st->codec->time_base.num
1816 && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
1818 if(st->parser && st->parser->parser->split && !st->codec->extradata)
1821 if (i == ic->nb_streams) {
1822 /* NOTE: if the format has no header, then we need to read
1823 some packets to get most of the streams, so we cannot
1825 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
1826 /* if we found the info for all the codecs, we can stop */
1831 /* we did not get all the codec info, but we read too much data */
1832 if (read_size >= MAX_READ_SIZE) {
1837 /* NOTE: a new stream can be added there if no header in file
1838 (AVFMTCTX_NOHEADER) */
1839 ret = av_read_frame_internal(ic, &pkt1);
1842 ret = -1; /* we could not have all the codec parameters before EOF */
1843 for(i=0;i<ic->nb_streams;i++) {
1844 st = ic->streams[i];
1845 if (!has_codec_parameters(st->codec)){
1847 avcodec_string(buf, sizeof(buf), st->codec, 0);
1848 av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
1856 pktl = av_mallocz(sizeof(AVPacketList));
1858 ret = AVERROR_NOMEM;
1862 /* add the packet in the buffered packet list */
1864 ppktl = &pktl->next;
1869 /* duplicate the packet */
1870 if (av_dup_packet(pkt) < 0) {
1871 ret = AVERROR_NOMEM;
1875 read_size += pkt->size;
1877 st = ic->streams[pkt->stream_index];
1878 st->codec_info_duration += pkt->duration;
1879 if (pkt->duration != 0)
1880 st->codec_info_nb_frames++;
1883 int index= pkt->stream_index;
1884 int64_t last= last_dts[index];
1885 int64_t duration= pkt->dts - last;
1887 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
1888 if(duration*duration_count[index]*10/9 < duration_sum[index]){
1889 duration_sum[index]= duration;
1890 duration_count[index]=1;
1892 int factor= av_rescale(2*duration, duration_count[index], duration_sum[index]);
1894 duration_count[index] *= 2;
1895 factor= av_rescale(duration, duration_count[index], duration_sum[index]);
1896 duration_sum[index] += duration;
1897 duration_count[index]+= factor;
1899 if(st->codec_info_nb_frames == 0 && 0)
1900 st->codec_info_duration += duration;
1902 last_dts[pkt->stream_index]= pkt->dts;
1904 if(st->parser && st->parser->parser->split && !st->codec->extradata){
1905 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
1907 st->codec->extradata_size= i;
1908 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1909 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
1910 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1914 /* if still no information, we try to open the codec and to
1915 decompress the frame. We try to avoid that in most cases as
1916 it takes longer and uses more memory. For MPEG4, we need to
1917 decompress for Quicktime. */
1918 if (!has_codec_parameters(st->codec) /*&&
1919 (st->codec->codec_id == CODEC_ID_FLV1 ||
1920 st->codec->codec_id == CODEC_ID_H264 ||
1921 st->codec->codec_id == CODEC_ID_H263 ||
1922 st->codec->codec_id == CODEC_ID_H261 ||
1923 st->codec->codec_id == CODEC_ID_VORBIS ||
1924 st->codec->codec_id == CODEC_ID_MJPEG ||
1925 st->codec->codec_id == CODEC_ID_PNG ||
1926 st->codec->codec_id == CODEC_ID_PAM ||
1927 st->codec->codec_id == CODEC_ID_PGM ||
1928 st->codec->codec_id == CODEC_ID_PGMYUV ||
1929 st->codec->codec_id == CODEC_ID_PBM ||
1930 st->codec->codec_id == CODEC_ID_PPM ||
1931 st->codec->codec_id == CODEC_ID_SHORTEN ||
1932 (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
1933 try_decode_frame(st, pkt->data, pkt->size);
1935 if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= MAX_STREAM_DURATION) {
1941 // close codecs which where opened in try_decode_frame()
1942 for(i=0;i<ic->nb_streams;i++) {
1943 st = ic->streams[i];
1944 if(st->codec->codec)
1945 avcodec_close(st->codec);
1947 for(i=0;i<ic->nb_streams;i++) {
1948 st = ic->streams[i];
1949 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1950 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample)
1951 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
1953 if(duration_count[i]
1954 && (st->codec->time_base.num*101LL <= st->codec->time_base.den || st->codec->codec_id == CODEC_ID_MPEG2VIDEO) &&
1955 //FIXME we should not special case mpeg2, but this needs testing with non mpeg2 ...
1956 st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den){
1957 int64_t num, den, error, best_error;
1959 num= st->time_base.den*duration_count[i];
1960 den= st->time_base.num*duration_sum[i];
1962 best_error= INT64_MAX;
1963 for(j=1; j<60*12; j++){
1964 error= FFABS(1001*12*num - 1001*j*den);
1965 if(error < best_error){
1967 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, j, 12, INT_MAX);
1971 static const int ticks[]= {24,30,60};
1972 error= FFABS(1001*12*num - 1000*12*den * ticks[j]);
1973 if(error < best_error){
1975 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, ticks[j]*1000, 1001, INT_MAX);
1980 if (!st->r_frame_rate.num){
1981 if( st->codec->time_base.den * (int64_t)st->time_base.num
1982 <= st->codec->time_base.num * (int64_t)st->time_base.den){
1983 st->r_frame_rate.num = st->codec->time_base.den;
1984 st->r_frame_rate.den = st->codec->time_base.num;
1986 st->r_frame_rate.num = st->time_base.den;
1987 st->r_frame_rate.den = st->time_base.num;
1993 av_estimate_timings(ic);
1995 /* correct DTS for b frame streams with no timestamps */
1996 for(i=0;i<ic->nb_streams;i++) {
1997 st = ic->streams[i];
1998 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2000 ppktl = &ic->packet_buffer;
2002 if(ppkt1->stream_index != i)
2004 if(ppkt1->pkt->dts < 0)
2006 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2008 ppkt1->pkt->dts -= delta;
2013 st->cur_dts -= delta;
2021 /*******************************************************/
2024 * start playing a network based stream (e.g. RTSP stream) at the
2027 int av_read_play(AVFormatContext *s)
2029 if (!s->iformat->read_play)
2030 return AVERROR_NOTSUPP;
2031 return s->iformat->read_play(s);
2035 * Pause a network based stream (e.g. RTSP stream).
2037 * Use av_read_play() to resume it.
2039 int av_read_pause(AVFormatContext *s)
2041 if (!s->iformat->read_pause)
2042 return AVERROR_NOTSUPP;
2043 return s->iformat->read_pause(s);
2047 * Close a media file (but not its codecs).
2049 * @param s media file handle
2051 void av_close_input_file(AVFormatContext *s)
2053 int i, must_open_file;
2056 /* free previous packet */
2057 if (s->cur_st && s->cur_st->parser)
2058 av_free_packet(&s->cur_pkt);
2060 if (s->iformat->read_close)
2061 s->iformat->read_close(s);
2062 for(i=0;i<s->nb_streams;i++) {
2063 /* free all data in a stream component */
2066 av_parser_close(st->parser);
2068 av_free(st->index_entries);
2069 av_free(st->codec->extradata);
2073 flush_packet_queue(s);
2075 if (s->iformat->flags & AVFMT_NOFILE) {
2078 if (must_open_file) {
2081 av_freep(&s->priv_data);
2086 * Add a new stream to a media file.
2088 * Can only be called in the read_header() function. If the flag
2089 * AVFMTCTX_NOHEADER is in the format context, then new streams
2090 * can be added in read_packet too.
2092 * @param s media file handle
2093 * @param id file format dependent stream id
2095 AVStream *av_new_stream(AVFormatContext *s, int id)
2100 if (s->nb_streams >= MAX_STREAMS)
2103 st = av_mallocz(sizeof(AVStream));
2107 st->codec= avcodec_alloc_context();
2109 /* no default bitrate if decoding */
2110 st->codec->bit_rate = 0;
2112 st->index = s->nb_streams;
2114 st->start_time = AV_NOPTS_VALUE;
2115 st->duration = AV_NOPTS_VALUE;
2116 st->cur_dts = AV_NOPTS_VALUE;
2118 /* default pts settings is MPEG like */
2119 av_set_pts_info(st, 33, 1, 90000);
2120 st->last_IP_pts = AV_NOPTS_VALUE;
2121 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2122 st->pts_buffer[i]= AV_NOPTS_VALUE;
2124 s->streams[s->nb_streams++] = st;
2128 /************************************************************/
2129 /* output media file */
2131 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2135 if (s->oformat->priv_data_size > 0) {
2136 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2138 return AVERROR_NOMEM;
2140 s->priv_data = NULL;
2142 if (s->oformat->set_parameters) {
2143 ret = s->oformat->set_parameters(s, ap);
2151 * allocate the stream private data and write the stream header to an
2154 * @param s media file handle
2155 * @return 0 if OK. AVERROR_xxx if error.
2157 int av_write_header(AVFormatContext *s)
2162 // some sanity checks
2163 for(i=0;i<s->nb_streams;i++) {
2166 switch (st->codec->codec_type) {
2167 case CODEC_TYPE_AUDIO:
2168 if(st->codec->sample_rate<=0){
2169 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2173 case CODEC_TYPE_VIDEO:
2174 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2175 av_log(s, AV_LOG_ERROR, "time base not set\n");
2178 if(st->codec->width<=0 || st->codec->height<=0){
2179 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2186 if(s->oformat->write_header){
2187 ret = s->oformat->write_header(s);
2192 /* init PTS generation */
2193 for(i=0;i<s->nb_streams;i++) {
2194 int64_t den = AV_NOPTS_VALUE;
2197 switch (st->codec->codec_type) {
2198 case CODEC_TYPE_AUDIO:
2199 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2201 case CODEC_TYPE_VIDEO:
2202 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2207 if (den != AV_NOPTS_VALUE) {
2209 return AVERROR_INVALIDDATA;
2210 av_frac_init(&st->pts, 0, 0, den);
2216 //FIXME merge with compute_pkt_fields
2217 static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
2218 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2219 int num, den, frame_size, i;
2221 // av_log(st->codec, AV_LOG_DEBUG, "av_write_frame: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2223 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2226 /* duration field */
2227 if (pkt->duration == 0) {
2228 compute_frame_duration(&num, &den, st, NULL, pkt);
2230 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
2234 //XXX/FIXME this is a temporary hack until all encoders output pts
2235 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2237 // pkt->pts= st->cur_dts;
2238 pkt->pts= st->pts.val;
2241 //calculate dts from pts
2242 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){
2243 st->pts_buffer[0]= pkt->pts;
2244 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2245 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
2246 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2247 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2249 pkt->dts= st->pts_buffer[0];
2252 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2253 av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
2256 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2257 av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n");
2261 // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2262 st->cur_dts= pkt->dts;
2263 st->pts.val= pkt->dts;
2266 switch (st->codec->codec_type) {
2267 case CODEC_TYPE_AUDIO:
2268 frame_size = get_audio_frame_size(st->codec, pkt->size);
2270 /* HACK/FIXME, we skip the initial 0-size packets as they are most likely equal to the encoder delay,
2271 but it would be better if we had the real timestamps from the encoder */
2272 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2273 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2276 case CODEC_TYPE_VIDEO:
2277 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2285 static void truncate_ts(AVStream *st, AVPacket *pkt){
2286 int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
2289 // pkt->dts= 0; //this happens for low_delay=0 and b frames, FIXME, needs further invstigation about what we should do here
2291 pkt->pts &= pts_mask;
2292 pkt->dts &= pts_mask;
2296 * Write a packet to an output media file.
2298 * The packet shall contain one audio or video frame.
2300 * @param s media file handle
2301 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
2302 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
2304 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2308 ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
2309 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2312 truncate_ts(s->streams[pkt->stream_index], pkt);
2314 ret= s->oformat->write_packet(s, pkt);
2316 ret= url_ferror(&s->pb);
2321 * Interleave a packet per DTS in an output media file.
2323 * Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
2324 * so they cannot be used after it, note calling av_free_packet() on them is still safe.
2326 * @param s media file handle
2327 * @param out the interleaved packet will be output here
2328 * @param in the input packet
2329 * @param flush 1 if no further packets are available as input and all
2330 * remaining packets should be output
2331 * @return 1 if a packet was output, 0 if no packet could be output,
2332 * < 0 if an error occured
2334 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2335 AVPacketList *pktl, **next_point, *this_pktl;
2337 int streams[MAX_STREAMS];
2340 AVStream *st= s->streams[ pkt->stream_index];
2342 // assert(pkt->destruct != av_destruct_packet); //FIXME
2344 this_pktl = av_mallocz(sizeof(AVPacketList));
2345 this_pktl->pkt= *pkt;
2346 if(pkt->destruct == av_destruct_packet)
2347 pkt->destruct= NULL; // non shared -> must keep original from being freed
2349 av_dup_packet(&this_pktl->pkt); //shared -> must dup
2351 next_point = &s->packet_buffer;
2353 AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
2354 int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
2355 int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
2356 if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
2358 next_point= &(*next_point)->next;
2360 this_pktl->next= *next_point;
2361 *next_point= this_pktl;
2364 memset(streams, 0, sizeof(streams));
2365 pktl= s->packet_buffer;
2367 //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
2368 if(streams[ pktl->pkt.stream_index ] == 0)
2370 streams[ pktl->pkt.stream_index ]++;
2374 if(s->nb_streams == stream_count || (flush && stream_count)){
2375 pktl= s->packet_buffer;
2378 s->packet_buffer= pktl->next;
2382 av_init_packet(out);
2388 * Interleaves a AVPacket correctly so it can be muxed.
2389 * @param out the interleaved packet will be output here
2390 * @param in the input packet
2391 * @param flush 1 if no further packets are available as input and all
2392 * remaining packets should be output
2393 * @return 1 if a packet was output, 0 if no packet could be output,
2394 * < 0 if an error occured
2396 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2397 if(s->oformat->interleave_packet)
2398 return s->oformat->interleave_packet(s, out, in, flush);
2400 return av_interleave_packet_per_dts(s, out, in, flush);
2404 * Writes a packet to an output media file ensuring correct interleaving.
2406 * The packet must contain one audio or video frame.
2407 * If the packets are already correctly interleaved the application should
2408 * call av_write_frame() instead as its slightly faster, its also important
2409 * to keep in mind that completly non interleaved input will need huge amounts
2410 * of memory to interleave with this, so its prefereable to interleave at the
2413 * @param s media file handle
2414 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
2415 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
2417 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2418 AVStream *st= s->streams[ pkt->stream_index];
2420 //FIXME/XXX/HACK drop zero sized packets
2421 if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
2424 //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
2425 if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2428 if(pkt->dts == AV_NOPTS_VALUE)
2433 int ret= av_interleave_packet(s, &opkt, pkt, 0);
2434 if(ret<=0) //FIXME cleanup needed for ret<0 ?
2437 truncate_ts(s->streams[opkt.stream_index], &opkt);
2438 ret= s->oformat->write_packet(s, &opkt);
2440 av_free_packet(&opkt);
2445 if(url_ferror(&s->pb))
2446 return url_ferror(&s->pb);
2451 * @brief Write the stream trailer to an output media file and
2452 * free the file private data.
2454 * @param s media file handle
2455 * @return 0 if OK. AVERROR_xxx if error.
2457 int av_write_trailer(AVFormatContext *s)
2463 ret= av_interleave_packet(s, &pkt, NULL, 1);
2464 if(ret<0) //FIXME cleanup needed for ret<0 ?
2469 truncate_ts(s->streams[pkt.stream_index], &pkt);
2470 ret= s->oformat->write_packet(s, &pkt);
2472 av_free_packet(&pkt);
2476 if(url_ferror(&s->pb))
2480 if(s->oformat->write_trailer)
2481 ret = s->oformat->write_trailer(s);
2484 ret=url_ferror(&s->pb);
2485 for(i=0;i<s->nb_streams;i++)
2486 av_freep(&s->streams[i]->priv_data);
2487 av_freep(&s->priv_data);
2491 /* "user interface" functions */
2493 void dump_format(AVFormatContext *ic,
2501 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
2502 is_output ? "Output" : "Input",
2504 is_output ? ic->oformat->name : ic->iformat->name,
2505 is_output ? "to" : "from", url);
2507 av_log(NULL, AV_LOG_INFO, " Duration: ");
2508 if (ic->duration != AV_NOPTS_VALUE) {
2509 int hours, mins, secs, us;
2510 secs = ic->duration / AV_TIME_BASE;
2511 us = ic->duration % AV_TIME_BASE;
2516 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%01d", hours, mins, secs,
2517 (10 * us) / AV_TIME_BASE);
2519 av_log(NULL, AV_LOG_INFO, "N/A");
2521 if (ic->start_time != AV_NOPTS_VALUE) {
2523 av_log(NULL, AV_LOG_INFO, ", start: ");
2524 secs = ic->start_time / AV_TIME_BASE;
2525 us = ic->start_time % AV_TIME_BASE;
2526 av_log(NULL, AV_LOG_INFO, "%d.%06d",
2527 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
2529 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
2531 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
2533 av_log(NULL, AV_LOG_INFO, "N/A");
2535 av_log(NULL, AV_LOG_INFO, "\n");
2537 for(i=0;i<ic->nb_streams;i++) {
2538 AVStream *st = ic->streams[i];
2539 int g= ff_gcd(st->time_base.num, st->time_base.den);
2540 avcodec_string(buf, sizeof(buf), st->codec, is_output);
2541 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
2542 /* the pid is an important information, so we display it */
2543 /* XXX: add a generic system */
2545 flags = ic->oformat->flags;
2547 flags = ic->iformat->flags;
2548 if (flags & AVFMT_SHOW_IDS) {
2549 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
2551 if (strlen(st->language) > 0) {
2552 av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
2554 av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
2555 av_log(NULL, AV_LOG_INFO, ": %s", buf);
2556 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2557 if(st->r_frame_rate.den && st->r_frame_rate.num)
2558 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(r)", av_q2d(st->r_frame_rate));
2559 /* else if(st->time_base.den && st->time_base.num)
2560 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(m)", 1/av_q2d(st->time_base));*/
2562 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(c)", 1/av_q2d(st->codec->time_base));
2564 av_log(NULL, AV_LOG_INFO, "\n");
2571 int frame_rate, frame_rate_base;
2574 static AbvEntry frame_abvs[] = {
2575 { "ntsc", 720, 480, 30000, 1001 },
2576 { "pal", 720, 576, 25, 1 },
2577 { "qntsc", 352, 240, 30000, 1001 }, /* VCD compliant ntsc */
2578 { "qpal", 352, 288, 25, 1 }, /* VCD compliant pal */
2579 { "sntsc", 640, 480, 30000, 1001 }, /* square pixel ntsc */
2580 { "spal", 768, 576, 25, 1 }, /* square pixel pal */
2581 { "film", 352, 240, 24, 1 },
2582 { "ntsc-film", 352, 240, 24000, 1001 },
2583 { "sqcif", 128, 96, 0, 0 },
2584 { "qcif", 176, 144, 0, 0 },
2585 { "cif", 352, 288, 0, 0 },
2586 { "4cif", 704, 576, 0, 0 },
2590 * parses width and height out of string str.
2592 int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
2595 int n = sizeof(frame_abvs) / sizeof(AbvEntry);
2597 int frame_width = 0, frame_height = 0;
2600 if (!strcmp(frame_abvs[i].abv, str)) {
2601 frame_width = frame_abvs[i].width;
2602 frame_height = frame_abvs[i].height;
2608 frame_width = strtol(p, (char **)&p, 10);
2611 frame_height = strtol(p, (char **)&p, 10);
2613 if (frame_width <= 0 || frame_height <= 0)
2615 *width_ptr = frame_width;
2616 *height_ptr = frame_height;
2621 * Converts frame rate from string to a fraction.
2623 * First we try to get an exact integer or fractional frame rate.
2624 * If this fails we convert the frame rate to a double and return
2625 * an approximate fraction using the DEFAULT_FRAME_RATE_BASE.
2627 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg)
2632 /* First, we check our abbreviation table */
2633 for (i = 0; i < sizeof(frame_abvs)/sizeof(*frame_abvs); ++i)
2634 if (!strcmp(frame_abvs[i].abv, arg)) {
2635 *frame_rate = frame_abvs[i].frame_rate;
2636 *frame_rate_base = frame_abvs[i].frame_rate_base;
2640 /* Then, we try to parse it as fraction */
2641 cp = strchr(arg, '/');
2643 cp = strchr(arg, ':');
2646 *frame_rate = strtol(arg, &cpp, 10);
2647 if (cpp != arg || cpp == cp)
2648 *frame_rate_base = strtol(cp+1, &cpp, 10);
2653 /* Finally we give up and parse it as double */
2654 AVRational time_base = av_d2q(strtod(arg, 0), DEFAULT_FRAME_RATE_BASE);
2655 *frame_rate_base = time_base.den;
2656 *frame_rate = time_base.num;
2658 if (!*frame_rate || !*frame_rate_base)
2665 * Converts date string to number of seconds since Jan 1st, 1970.
2669 * - If not a duration:
2670 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
2671 * Time is localtime unless Z is suffixed to the end. In this case GMT
2672 * Return the date in micro seconds since 1970
2675 * HH[:MM[:SS[.m...]]]
2679 #ifndef CONFIG_WINCE
2680 int64_t parse_date(const char *datestr, int duration)
2686 static const char *date_fmt[] = {
2690 static const char *time_fmt[] = {
2700 time_t now = time(0);
2702 len = strlen(datestr);
2704 lastch = datestr[len - 1];
2707 is_utc = (lastch == 'z' || lastch == 'Z');
2709 memset(&dt, 0, sizeof(dt));
2714 for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) {
2715 q = small_strptime(p, date_fmt[i], &dt);
2725 dt = *localtime(&now);
2727 dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
2732 if (*p == 'T' || *p == 't' || *p == ' ')
2735 for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) {
2736 q = small_strptime(p, time_fmt[i], &dt);
2746 q = small_strptime(p, time_fmt[0], &dt);
2748 dt.tm_sec = strtol(p, (char **)&q, 10);
2754 /* Now we have all the fields that we can get */
2759 return now * int64_t_C(1000000);
2763 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
2765 dt.tm_isdst = -1; /* unknown */
2778 for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
2781 val += n * (*q - '0');
2785 return negative ? -t : t;
2787 #endif /* CONFIG_WINCE */
2790 * Attempts to find a specific tag in a URL.
2792 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
2793 * Return 1 if found.
2795 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
2805 while (*p != '\0' && *p != '=' && *p != '&') {
2806 if ((q - tag) < sizeof(tag) - 1)
2814 while (*p != '&' && *p != '\0') {
2815 if ((q - arg) < arg_size - 1) {
2825 if (!strcmp(tag, tag1))
2835 * Returns in 'buf' the path with '%d' replaced by number.
2837 * Also handles the '%0nd' format where 'n' is the total number
2838 * of digits and '%%'.
2840 * @param buf destination buffer
2841 * @param buf_size destination buffer size
2842 * @param path numbered sequence string
2843 * @number frame number
2844 * @return 0 if OK, -1 if format error.
2846 int av_get_frame_filename(char *buf, int buf_size,
2847 const char *path, int number)
2850 char *q, buf1[20], c;
2851 int nd, len, percentd_found;
2863 while (isdigit(*p)) {
2864 nd = nd * 10 + *p++ - '0';
2867 } while (isdigit(c));
2876 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
2878 if ((q - buf + len) > buf_size - 1)
2880 memcpy(q, buf1, len);
2888 if ((q - buf) < buf_size - 1)
2892 if (!percentd_found)
2902 * Print nice hexa dump of a buffer
2903 * @param f stream for output
2905 * @param size buffer size
2907 void av_hex_dump(FILE *f, uint8_t *buf, int size)
2911 for(i=0;i<size;i+=16) {
2915 fprintf(f, "%08x ", i);
2918 fprintf(f, " %02x", buf[i+j]);
2923 for(j=0;j<len;j++) {
2925 if (c < ' ' || c > '~')
2927 fprintf(f, "%c", c);
2934 * Print on 'f' a nice dump of a packet
2935 * @param f stream for output
2936 * @param pkt packet to dump
2937 * @param dump_payload true if the payload must be displayed too
2939 //FIXME needs to know the time_base
2940 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
2942 fprintf(f, "stream #%d:\n", pkt->stream_index);
2943 fprintf(f, " keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
2944 fprintf(f, " duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
2945 /* DTS is _always_ valid after av_read_frame() */
2946 fprintf(f, " dts=");
2947 if (pkt->dts == AV_NOPTS_VALUE)
2950 fprintf(f, "%0.3f", (double)pkt->dts / AV_TIME_BASE);
2951 /* PTS may be not known if B frames are present */
2952 fprintf(f, " pts=");
2953 if (pkt->pts == AV_NOPTS_VALUE)
2956 fprintf(f, "%0.3f", (double)pkt->pts / AV_TIME_BASE);
2958 fprintf(f, " size=%d\n", pkt->size);
2960 av_hex_dump(f, pkt->data, pkt->size);
2963 void url_split(char *proto, int proto_size,
2964 char *authorization, int authorization_size,
2965 char *hostname, int hostname_size,
2967 char *path, int path_size,
2978 while (*p != ':' && *p != '\0') {
2979 if ((q - proto) < proto_size - 1)
2985 if (authorization_size > 0)
2986 authorization[0] = '\0';
2990 if (hostname_size > 0)
2994 char *at,*slash; // PETR: position of '@' character and '/' character
3001 at = strchr(p,'@'); // PETR: get the position of '@'
3002 slash = strchr(p,'/'); // PETR: get position of '/' - end of hostname
3003 if (at && slash && at > slash) at = NULL; // PETR: not interested in '@' behind '/'
3005 q = at ? authorization : hostname; // PETR: if '@' exists starting with auth.
3007 while ((at || *p != ':') && *p != '/' && *p != '?' && *p != '\0') { // PETR:
3008 if (*p == '@') { // PETR: passed '@'
3009 if (authorization_size > 0)
3013 } else if (!at) { // PETR: hostname
3014 if ((q - hostname) < hostname_size - 1)
3017 if ((q - authorization) < authorization_size - 1)
3022 if (hostname_size > 0)
3026 port = strtoul(p, (char **)&p, 10);
3031 pstrcpy(path, path_size, p);
3035 * Set the pts for a given stream.
3038 * @param pts_wrap_bits number of bits effectively used by the pts
3039 * (used for wrap control, 33 is the value for MPEG)
3040 * @param pts_num numerator to convert to seconds (MPEG: 1)
3041 * @param pts_den denominator to convert to seconds (MPEG: 90000)
3043 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3044 int pts_num, int pts_den)
3046 s->pts_wrap_bits = pts_wrap_bits;
3047 s->time_base.num = pts_num;
3048 s->time_base.den = pts_den;
3051 /* fraction handling */
3054 * f = val + (num / den) + 0.5.
3056 * 'num' is normalized so that it is such as 0 <= num < den.
3058 * @param f fractional number
3059 * @param val integer value
3060 * @param num must be >= 0
3061 * @param den must be >= 1
3063 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
3076 * Set f to (val + 0.5).
3078 static void av_frac_set(AVFrac *f, int64_t val)
3081 f->num = f->den >> 1;
3085 * Fractionnal addition to f: f = f + (incr / f->den).
3087 * @param f fractional number
3088 * @param incr increment, can be positive or negative
3090 static void av_frac_add(AVFrac *f, int64_t incr)
3094 num = f->num + incr;
3097 f->val += num / den;
3103 } else if (num >= den) {
3104 f->val += num / den;