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);
36 /** head of registered input format linked list. */
37 AVInputFormat *first_iformat = NULL;
38 /** head of registered output format linked list. */
39 AVOutputFormat *first_oformat = NULL;
41 void av_register_input_format(AVInputFormat *format)
45 while (*p != NULL) p = &(*p)->next;
50 void av_register_output_format(AVOutputFormat *format)
54 while (*p != NULL) p = &(*p)->next;
59 int match_ext(const char *filename, const char *extensions)
67 ext = strrchr(filename, '.');
73 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
76 if (!strcasecmp(ext1, ext))
86 AVOutputFormat *guess_format(const char *short_name, const char *filename,
87 const char *mime_type)
89 AVOutputFormat *fmt, *fmt_found;
92 /* specific test for image sequences */
93 #ifdef CONFIG_IMAGE2_MUXER
94 if (!short_name && filename &&
95 av_filename_number_test(filename) &&
96 av_guess_image2_codec(filename) != CODEC_ID_NONE) {
97 return guess_format("image2", NULL, NULL);
100 /* find the proper file type */
104 while (fmt != NULL) {
106 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
108 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
110 if (filename && fmt->extensions &&
111 match_ext(filename, fmt->extensions)) {
114 if (score > score_max) {
123 AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
124 const char *mime_type)
126 AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
129 AVOutputFormat *stream_fmt;
130 char stream_format_name[64];
132 snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
133 stream_fmt = guess_format(stream_format_name, NULL, NULL);
143 * Guesses the codec id based upon muxer and filename.
145 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
146 const char *filename, const char *mime_type, enum CodecType type){
147 if(type == CODEC_TYPE_VIDEO){
148 enum CodecID codec_id= CODEC_ID_NONE;
150 #ifdef CONFIG_IMAGE2_MUXER
151 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
152 codec_id= av_guess_image2_codec(filename);
155 if(codec_id == CODEC_ID_NONE)
156 codec_id= fmt->video_codec;
158 }else if(type == CODEC_TYPE_AUDIO)
159 return fmt->audio_codec;
161 return CODEC_ID_NONE;
165 * finds AVInputFormat based on input format's short name.
167 AVInputFormat *av_find_input_format(const char *short_name)
170 for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
171 if (!strcmp(fmt->name, short_name))
177 /* memory handling */
180 * Default packet destructor.
182 void av_destruct_packet(AVPacket *pkt)
185 pkt->data = NULL; pkt->size = 0;
189 * Allocate the payload of a packet and intialized its fields to default values.
192 * @param size wanted payload size
193 * @return 0 if OK. AVERROR_xxx otherwise.
195 int av_new_packet(AVPacket *pkt, int size)
198 if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
199 return AVERROR_NOMEM;
200 data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
202 return AVERROR_NOMEM;
203 memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
208 pkt->destruct = av_destruct_packet;
213 * Allocate and read the payload of a packet and intialized its fields to default values.
216 * @param size wanted payload size
217 * @return >0 (read size) if OK. AVERROR_xxx otherwise.
219 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
221 int ret= av_new_packet(pkt, size);
226 pkt->pos= url_ftell(s);
228 ret= get_buffer(s, pkt->data, size);
237 /* This is a hack - the packet memory allocation stuff is broken. The
238 packet is allocated if it was not really allocated */
239 int av_dup_packet(AVPacket *pkt)
241 if (pkt->destruct != av_destruct_packet) {
243 /* we duplicate the packet and don't forget to put the padding
245 if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
246 return AVERROR_NOMEM;
247 data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
249 return AVERROR_NOMEM;
251 memcpy(data, pkt->data, pkt->size);
252 memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
254 pkt->destruct = av_destruct_packet;
260 * Allocate the payload of a packet and intialized its fields to default values.
262 * @param filename possible numbered sequence string
263 * @return 1 if a valid numbered sequence string, 0 otherwise.
265 int av_filename_number_test(const char *filename)
268 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
274 * @param is_opened whether the file is already opened, determines whether
275 * demuxers with or without AVFMT_NOFILE are probed
277 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
279 AVInputFormat *fmt1, *fmt;
280 int score, score_max;
284 for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
285 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
288 if (fmt1->read_probe) {
289 score = fmt1->read_probe(pd);
290 } else if (fmt1->extensions) {
291 if (match_ext(pd->filename, fmt1->extensions)) {
295 if (score > score_max) {
303 /************************************************************/
304 /* input media file */
307 * Open a media file from an IO stream. 'fmt' must be specified.
309 static const char* format_to_name(void* ptr)
311 AVFormatContext* fc = (AVFormatContext*) ptr;
312 if(fc->iformat) return fc->iformat->name;
313 else if(fc->oformat) return fc->oformat->name;
317 #define OFFSET(x) offsetof(AVFormatContext,x)
318 #define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C
319 //these names are too long to be readable
320 #define E AV_OPT_FLAG_ENCODING_PARAM
321 #define D AV_OPT_FLAG_DECODING_PARAM
323 static const AVOption options[]={
324 {"probesize", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */
325 {"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
326 {"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
327 {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
328 {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
329 {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
330 {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
331 {"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
339 static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
341 static 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 = INT64_MAX;
1476 end_time = INT64_MIN;
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 != INT64_MAX) {
1492 ic->start_time = start_time;
1493 if (end_time != INT64_MIN) {
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))
1763 #define MAX_STD_TIMEBASES (60*12+5)
1764 static int get_std_framerate(int i){
1765 if(i<60*12) return i*1001;
1766 else return ((int[]){24,30,60,12,15})[i-60*12]*1000*12;
1770 * Read the beginning of a media file to get stream information. This
1771 * is useful for file formats with no headers such as MPEG. This
1772 * function also compute the real frame rate in case of mpeg2 repeat
1775 * @param ic media file handle
1776 * @return >=0 if OK. AVERROR_xxx if error.
1777 * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need
1779 int av_find_stream_info(AVFormatContext *ic)
1781 int i, count, ret, read_size, j;
1783 AVPacket pkt1, *pkt;
1784 AVPacketList *pktl=NULL, **ppktl;
1785 int64_t last_dts[MAX_STREAMS];
1786 int duration_count[MAX_STREAMS]={0};
1787 double duration_error[MAX_STREAMS][MAX_STD_TIMEBASES]={{0}}; //FIXME malloc()?
1789 for(i=0;i<ic->nb_streams;i++) {
1790 st = ic->streams[i];
1791 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
1792 /* if(!st->time_base.num)
1794 if(!st->codec->time_base.num)
1795 st->codec->time_base= st->time_base;
1797 //only for the split stuff
1799 st->parser = av_parser_init(st->codec->codec_id);
1800 if(st->need_parsing == 2 && st->parser){
1801 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1806 for(i=0;i<MAX_STREAMS;i++){
1807 last_dts[i]= AV_NOPTS_VALUE;
1812 ppktl = &ic->packet_buffer;
1814 /* check if one codec still needs to be handled */
1815 for(i=0;i<ic->nb_streams;i++) {
1816 st = ic->streams[i];
1817 if (!has_codec_parameters(st->codec))
1819 /* variable fps and no guess at the real fps */
1820 if( st->codec->time_base.den >= 101LL*st->codec->time_base.num
1821 && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
1823 if(st->parser && st->parser->parser->split && !st->codec->extradata)
1826 if (i == ic->nb_streams) {
1827 /* NOTE: if the format has no header, then we need to read
1828 some packets to get most of the streams, so we cannot
1830 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
1831 /* if we found the info for all the codecs, we can stop */
1836 /* we did not get all the codec info, but we read too much data */
1837 if (read_size >= MAX_READ_SIZE) {
1842 /* NOTE: a new stream can be added there if no header in file
1843 (AVFMTCTX_NOHEADER) */
1844 ret = av_read_frame_internal(ic, &pkt1);
1847 ret = -1; /* we could not have all the codec parameters before EOF */
1848 for(i=0;i<ic->nb_streams;i++) {
1849 st = ic->streams[i];
1850 if (!has_codec_parameters(st->codec)){
1852 avcodec_string(buf, sizeof(buf), st->codec, 0);
1853 av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
1861 pktl = av_mallocz(sizeof(AVPacketList));
1863 ret = AVERROR_NOMEM;
1867 /* add the packet in the buffered packet list */
1869 ppktl = &pktl->next;
1874 /* duplicate the packet */
1875 if (av_dup_packet(pkt) < 0) {
1876 ret = AVERROR_NOMEM;
1880 read_size += pkt->size;
1882 st = ic->streams[pkt->stream_index];
1883 if(st->codec_info_nb_frames>1) //FIXME move codec_info_nb_frames and codec_info_duration from AVStream into this func
1884 st->codec_info_duration += pkt->duration;
1885 if (pkt->duration != 0)
1886 st->codec_info_nb_frames++;
1889 int index= pkt->stream_index;
1890 int64_t last= last_dts[index];
1891 int64_t duration= pkt->dts - last;
1893 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
1894 double dur= duration * av_q2d(st->time_base);
1896 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
1897 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
1898 if(duration_count[index] < 2)
1899 memset(duration_error, 0, sizeof(duration_error));
1900 for(i=1; i<MAX_STD_TIMEBASES; i++){
1901 int framerate= get_std_framerate(i);
1902 int ticks= lrintf(dur*framerate/(1001*12));
1903 double error= dur - ticks*1001*12/(double)framerate;
1904 duration_error[index][i] += error*error;
1906 duration_count[index]++;
1908 if(st->codec_info_nb_frames == 0 && 0)
1909 st->codec_info_duration += duration;
1911 if(last == AV_NOPTS_VALUE || duration_count[index]<=1)
1912 last_dts[pkt->stream_index]= pkt->dts;
1914 if(st->parser && st->parser->parser->split && !st->codec->extradata){
1915 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
1917 st->codec->extradata_size= i;
1918 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1919 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
1920 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1924 /* if still no information, we try to open the codec and to
1925 decompress the frame. We try to avoid that in most cases as
1926 it takes longer and uses more memory. For MPEG4, we need to
1927 decompress for Quicktime. */
1928 if (!has_codec_parameters(st->codec) /*&&
1929 (st->codec->codec_id == CODEC_ID_FLV1 ||
1930 st->codec->codec_id == CODEC_ID_H264 ||
1931 st->codec->codec_id == CODEC_ID_H263 ||
1932 st->codec->codec_id == CODEC_ID_H261 ||
1933 st->codec->codec_id == CODEC_ID_VORBIS ||
1934 st->codec->codec_id == CODEC_ID_MJPEG ||
1935 st->codec->codec_id == CODEC_ID_PNG ||
1936 st->codec->codec_id == CODEC_ID_PAM ||
1937 st->codec->codec_id == CODEC_ID_PGM ||
1938 st->codec->codec_id == CODEC_ID_PGMYUV ||
1939 st->codec->codec_id == CODEC_ID_PBM ||
1940 st->codec->codec_id == CODEC_ID_PPM ||
1941 st->codec->codec_id == CODEC_ID_SHORTEN ||
1942 (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
1943 try_decode_frame(st, pkt->data, pkt->size);
1945 if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= MAX_STREAM_DURATION) {
1951 // close codecs which where opened in try_decode_frame()
1952 for(i=0;i<ic->nb_streams;i++) {
1953 st = ic->streams[i];
1954 if(st->codec->codec)
1955 avcodec_close(st->codec);
1957 for(i=0;i<ic->nb_streams;i++) {
1958 st = ic->streams[i];
1959 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1960 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample)
1961 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
1963 if(duration_count[i]
1964 && (st->codec->time_base.num*101LL <= st->codec->time_base.den || st->codec->codec_id == CODEC_ID_MPEG2VIDEO) /*&&
1965 //FIXME we should not special case mpeg2, but this needs testing with non mpeg2 ...
1966 st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
1967 double best_error= 2*av_q2d(st->time_base);
1968 best_error= best_error*best_error*duration_count[i]*1000*12*30;
1970 for(j=1; j<MAX_STD_TIMEBASES; j++){
1971 double error= duration_error[i][j] * get_std_framerate(j);
1972 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
1973 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
1974 if(error < best_error){
1976 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 12*1001, INT_MAX);
1981 if (!st->r_frame_rate.num){
1982 if( st->codec->time_base.den * (int64_t)st->time_base.num
1983 <= st->codec->time_base.num * (int64_t)st->time_base.den){
1984 st->r_frame_rate.num = st->codec->time_base.den;
1985 st->r_frame_rate.den = st->codec->time_base.num;
1987 st->r_frame_rate.num = st->time_base.den;
1988 st->r_frame_rate.den = st->time_base.num;
1994 av_estimate_timings(ic);
1996 /* correct DTS for b frame streams with no timestamps */
1997 for(i=0;i<ic->nb_streams;i++) {
1998 st = ic->streams[i];
1999 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2001 ppktl = &ic->packet_buffer;
2003 if(ppkt1->stream_index != i)
2005 if(ppkt1->pkt->dts < 0)
2007 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2009 ppkt1->pkt->dts -= delta;
2014 st->cur_dts -= delta;
2022 /*******************************************************/
2025 * start playing a network based stream (e.g. RTSP stream) at the
2028 int av_read_play(AVFormatContext *s)
2030 if (!s->iformat->read_play)
2031 return AVERROR_NOTSUPP;
2032 return s->iformat->read_play(s);
2036 * Pause a network based stream (e.g. RTSP stream).
2038 * Use av_read_play() to resume it.
2040 int av_read_pause(AVFormatContext *s)
2042 if (!s->iformat->read_pause)
2043 return AVERROR_NOTSUPP;
2044 return s->iformat->read_pause(s);
2048 * Close a media file (but not its codecs).
2050 * @param s media file handle
2052 void av_close_input_file(AVFormatContext *s)
2054 int i, must_open_file;
2057 /* free previous packet */
2058 if (s->cur_st && s->cur_st->parser)
2059 av_free_packet(&s->cur_pkt);
2061 if (s->iformat->read_close)
2062 s->iformat->read_close(s);
2063 for(i=0;i<s->nb_streams;i++) {
2064 /* free all data in a stream component */
2067 av_parser_close(st->parser);
2069 av_free(st->index_entries);
2070 av_free(st->codec->extradata);
2074 flush_packet_queue(s);
2076 if (s->iformat->flags & AVFMT_NOFILE) {
2079 if (must_open_file) {
2082 av_freep(&s->priv_data);
2087 * Add a new stream to a media file.
2089 * Can only be called in the read_header() function. If the flag
2090 * AVFMTCTX_NOHEADER is in the format context, then new streams
2091 * can be added in read_packet too.
2093 * @param s media file handle
2094 * @param id file format dependent stream id
2096 AVStream *av_new_stream(AVFormatContext *s, int id)
2101 if (s->nb_streams >= MAX_STREAMS)
2104 st = av_mallocz(sizeof(AVStream));
2108 st->codec= avcodec_alloc_context();
2110 /* no default bitrate if decoding */
2111 st->codec->bit_rate = 0;
2113 st->index = s->nb_streams;
2115 st->start_time = AV_NOPTS_VALUE;
2116 st->duration = AV_NOPTS_VALUE;
2117 st->cur_dts = AV_NOPTS_VALUE;
2119 /* default pts settings is MPEG like */
2120 av_set_pts_info(st, 33, 1, 90000);
2121 st->last_IP_pts = AV_NOPTS_VALUE;
2122 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2123 st->pts_buffer[i]= AV_NOPTS_VALUE;
2125 s->streams[s->nb_streams++] = st;
2129 /************************************************************/
2130 /* output media file */
2132 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2136 if (s->oformat->priv_data_size > 0) {
2137 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2139 return AVERROR_NOMEM;
2141 s->priv_data = NULL;
2143 if (s->oformat->set_parameters) {
2144 ret = s->oformat->set_parameters(s, ap);
2152 * allocate the stream private data and write the stream header to an
2155 * @param s media file handle
2156 * @return 0 if OK. AVERROR_xxx if error.
2158 int av_write_header(AVFormatContext *s)
2163 // some sanity checks
2164 for(i=0;i<s->nb_streams;i++) {
2167 switch (st->codec->codec_type) {
2168 case CODEC_TYPE_AUDIO:
2169 if(st->codec->sample_rate<=0){
2170 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2174 case CODEC_TYPE_VIDEO:
2175 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2176 av_log(s, AV_LOG_ERROR, "time base not set\n");
2179 if(st->codec->width<=0 || st->codec->height<=0){
2180 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2186 if(s->oformat->codec_tag){
2187 if(st->codec->codec_tag){
2189 //check that tag + id is in the table
2190 //if neither is in the table -> ok
2191 //if tag is in the table with another id -> FAIL
2192 //if id is in the table with another tag -> FAIL unless strict < ?
2194 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2198 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2199 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2201 return AVERROR_NOMEM;
2204 if(s->oformat->write_header){
2205 ret = s->oformat->write_header(s);
2210 /* init PTS generation */
2211 for(i=0;i<s->nb_streams;i++) {
2212 int64_t den = AV_NOPTS_VALUE;
2215 switch (st->codec->codec_type) {
2216 case CODEC_TYPE_AUDIO:
2217 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2219 case CODEC_TYPE_VIDEO:
2220 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2225 if (den != AV_NOPTS_VALUE) {
2227 return AVERROR_INVALIDDATA;
2228 av_frac_init(&st->pts, 0, 0, den);
2234 //FIXME merge with compute_pkt_fields
2235 static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
2236 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2237 int num, den, frame_size, i;
2239 // 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);
2241 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2244 /* duration field */
2245 if (pkt->duration == 0) {
2246 compute_frame_duration(&num, &den, st, NULL, pkt);
2248 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
2252 //XXX/FIXME this is a temporary hack until all encoders output pts
2253 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2255 // pkt->pts= st->cur_dts;
2256 pkt->pts= st->pts.val;
2259 //calculate dts from pts
2260 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){
2261 st->pts_buffer[0]= pkt->pts;
2262 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2263 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
2264 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2265 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2267 pkt->dts= st->pts_buffer[0];
2270 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2271 av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
2274 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2275 av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n");
2279 // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2280 st->cur_dts= pkt->dts;
2281 st->pts.val= pkt->dts;
2284 switch (st->codec->codec_type) {
2285 case CODEC_TYPE_AUDIO:
2286 frame_size = get_audio_frame_size(st->codec, pkt->size);
2288 /* HACK/FIXME, we skip the initial 0-size packets as they are most likely equal to the encoder delay,
2289 but it would be better if we had the real timestamps from the encoder */
2290 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2291 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2294 case CODEC_TYPE_VIDEO:
2295 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2303 static void truncate_ts(AVStream *st, AVPacket *pkt){
2304 int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
2307 // pkt->dts= 0; //this happens for low_delay=0 and b frames, FIXME, needs further invstigation about what we should do here
2309 if (pkt->pts != AV_NOPTS_VALUE)
2310 pkt->pts &= pts_mask;
2311 if (pkt->dts != AV_NOPTS_VALUE)
2312 pkt->dts &= pts_mask;
2316 * Write a packet to an output media file.
2318 * The packet shall contain one audio or video frame.
2320 * @param s media file handle
2321 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
2322 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
2324 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2328 ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
2329 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2332 truncate_ts(s->streams[pkt->stream_index], pkt);
2334 ret= s->oformat->write_packet(s, pkt);
2336 ret= url_ferror(&s->pb);
2341 * Interleave a packet per DTS in an output media file.
2343 * Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
2344 * so they cannot be used after it, note calling av_free_packet() on them is still safe.
2346 * @param s media file handle
2347 * @param out the interleaved packet will be output here
2348 * @param in the input packet
2349 * @param flush 1 if no further packets are available as input and all
2350 * remaining packets should be output
2351 * @return 1 if a packet was output, 0 if no packet could be output,
2352 * < 0 if an error occured
2354 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2355 AVPacketList *pktl, **next_point, *this_pktl;
2357 int streams[MAX_STREAMS];
2360 AVStream *st= s->streams[ pkt->stream_index];
2362 // assert(pkt->destruct != av_destruct_packet); //FIXME
2364 this_pktl = av_mallocz(sizeof(AVPacketList));
2365 this_pktl->pkt= *pkt;
2366 if(pkt->destruct == av_destruct_packet)
2367 pkt->destruct= NULL; // non shared -> must keep original from being freed
2369 av_dup_packet(&this_pktl->pkt); //shared -> must dup
2371 next_point = &s->packet_buffer;
2373 AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
2374 int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
2375 int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
2376 if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
2378 next_point= &(*next_point)->next;
2380 this_pktl->next= *next_point;
2381 *next_point= this_pktl;
2384 memset(streams, 0, sizeof(streams));
2385 pktl= s->packet_buffer;
2387 //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
2388 if(streams[ pktl->pkt.stream_index ] == 0)
2390 streams[ pktl->pkt.stream_index ]++;
2394 if(s->nb_streams == stream_count || (flush && stream_count)){
2395 pktl= s->packet_buffer;
2398 s->packet_buffer= pktl->next;
2402 av_init_packet(out);
2408 * Interleaves a AVPacket correctly so it can be muxed.
2409 * @param out the interleaved packet will be output here
2410 * @param in the input packet
2411 * @param flush 1 if no further packets are available as input and all
2412 * remaining packets should be output
2413 * @return 1 if a packet was output, 0 if no packet could be output,
2414 * < 0 if an error occured
2416 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2417 if(s->oformat->interleave_packet)
2418 return s->oformat->interleave_packet(s, out, in, flush);
2420 return av_interleave_packet_per_dts(s, out, in, flush);
2424 * Writes a packet to an output media file ensuring correct interleaving.
2426 * The packet must contain one audio or video frame.
2427 * If the packets are already correctly interleaved the application should
2428 * call av_write_frame() instead as its slightly faster, its also important
2429 * to keep in mind that completly non interleaved input will need huge amounts
2430 * of memory to interleave with this, so its prefereable to interleave at the
2433 * @param s media file handle
2434 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
2435 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
2437 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2438 AVStream *st= s->streams[ pkt->stream_index];
2440 //FIXME/XXX/HACK drop zero sized packets
2441 if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
2444 //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
2445 if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2448 if(pkt->dts == AV_NOPTS_VALUE)
2453 int ret= av_interleave_packet(s, &opkt, pkt, 0);
2454 if(ret<=0) //FIXME cleanup needed for ret<0 ?
2457 truncate_ts(s->streams[opkt.stream_index], &opkt);
2458 ret= s->oformat->write_packet(s, &opkt);
2460 av_free_packet(&opkt);
2465 if(url_ferror(&s->pb))
2466 return url_ferror(&s->pb);
2471 * @brief Write the stream trailer to an output media file and
2472 * free the file private data.
2474 * @param s media file handle
2475 * @return 0 if OK. AVERROR_xxx if error.
2477 int av_write_trailer(AVFormatContext *s)
2483 ret= av_interleave_packet(s, &pkt, NULL, 1);
2484 if(ret<0) //FIXME cleanup needed for ret<0 ?
2489 truncate_ts(s->streams[pkt.stream_index], &pkt);
2490 ret= s->oformat->write_packet(s, &pkt);
2492 av_free_packet(&pkt);
2496 if(url_ferror(&s->pb))
2500 if(s->oformat->write_trailer)
2501 ret = s->oformat->write_trailer(s);
2504 ret=url_ferror(&s->pb);
2505 for(i=0;i<s->nb_streams;i++)
2506 av_freep(&s->streams[i]->priv_data);
2507 av_freep(&s->priv_data);
2511 /* "user interface" functions */
2513 void dump_format(AVFormatContext *ic,
2521 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
2522 is_output ? "Output" : "Input",
2524 is_output ? ic->oformat->name : ic->iformat->name,
2525 is_output ? "to" : "from", url);
2527 av_log(NULL, AV_LOG_INFO, " Duration: ");
2528 if (ic->duration != AV_NOPTS_VALUE) {
2529 int hours, mins, secs, us;
2530 secs = ic->duration / AV_TIME_BASE;
2531 us = ic->duration % AV_TIME_BASE;
2536 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%01d", hours, mins, secs,
2537 (10 * us) / AV_TIME_BASE);
2539 av_log(NULL, AV_LOG_INFO, "N/A");
2541 if (ic->start_time != AV_NOPTS_VALUE) {
2543 av_log(NULL, AV_LOG_INFO, ", start: ");
2544 secs = ic->start_time / AV_TIME_BASE;
2545 us = ic->start_time % AV_TIME_BASE;
2546 av_log(NULL, AV_LOG_INFO, "%d.%06d",
2547 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
2549 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
2551 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
2553 av_log(NULL, AV_LOG_INFO, "N/A");
2555 av_log(NULL, AV_LOG_INFO, "\n");
2557 for(i=0;i<ic->nb_streams;i++) {
2558 AVStream *st = ic->streams[i];
2559 int g= ff_gcd(st->time_base.num, st->time_base.den);
2560 avcodec_string(buf, sizeof(buf), st->codec, is_output);
2561 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
2562 /* the pid is an important information, so we display it */
2563 /* XXX: add a generic system */
2565 flags = ic->oformat->flags;
2567 flags = ic->iformat->flags;
2568 if (flags & AVFMT_SHOW_IDS) {
2569 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
2571 if (strlen(st->language) > 0) {
2572 av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
2574 av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
2575 av_log(NULL, AV_LOG_INFO, ": %s", buf);
2576 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2577 if(st->r_frame_rate.den && st->r_frame_rate.num)
2578 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(r)", av_q2d(st->r_frame_rate));
2579 /* else if(st->time_base.den && st->time_base.num)
2580 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(m)", 1/av_q2d(st->time_base));*/
2582 av_log(NULL, AV_LOG_INFO, ", %5.2f fps(c)", 1/av_q2d(st->codec->time_base));
2584 av_log(NULL, AV_LOG_INFO, "\n");
2591 int frame_rate, frame_rate_base;
2594 static AbvEntry frame_abvs[] = {
2595 { "ntsc", 720, 480, 30000, 1001 },
2596 { "pal", 720, 576, 25, 1 },
2597 { "qntsc", 352, 240, 30000, 1001 }, /* VCD compliant ntsc */
2598 { "qpal", 352, 288, 25, 1 }, /* VCD compliant pal */
2599 { "sntsc", 640, 480, 30000, 1001 }, /* square pixel ntsc */
2600 { "spal", 768, 576, 25, 1 }, /* square pixel pal */
2601 { "film", 352, 240, 24, 1 },
2602 { "ntsc-film", 352, 240, 24000, 1001 },
2603 { "sqcif", 128, 96, 0, 0 },
2604 { "qcif", 176, 144, 0, 0 },
2605 { "cif", 352, 288, 0, 0 },
2606 { "4cif", 704, 576, 0, 0 },
2610 * parses width and height out of string str.
2612 int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
2615 int n = sizeof(frame_abvs) / sizeof(AbvEntry);
2617 int frame_width = 0, frame_height = 0;
2620 if (!strcmp(frame_abvs[i].abv, str)) {
2621 frame_width = frame_abvs[i].width;
2622 frame_height = frame_abvs[i].height;
2628 frame_width = strtol(p, (char **)&p, 10);
2631 frame_height = strtol(p, (char **)&p, 10);
2633 if (frame_width <= 0 || frame_height <= 0)
2635 *width_ptr = frame_width;
2636 *height_ptr = frame_height;
2641 * Converts frame rate from string to a fraction.
2643 * First we try to get an exact integer or fractional frame rate.
2644 * If this fails we convert the frame rate to a double and return
2645 * an approximate fraction using the DEFAULT_FRAME_RATE_BASE.
2647 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg)
2652 /* First, we check our abbreviation table */
2653 for (i = 0; i < sizeof(frame_abvs)/sizeof(*frame_abvs); ++i)
2654 if (!strcmp(frame_abvs[i].abv, arg)) {
2655 *frame_rate = frame_abvs[i].frame_rate;
2656 *frame_rate_base = frame_abvs[i].frame_rate_base;
2660 /* Then, we try to parse it as fraction */
2661 cp = strchr(arg, '/');
2663 cp = strchr(arg, ':');
2666 *frame_rate = strtol(arg, &cpp, 10);
2667 if (cpp != arg || cpp == cp)
2668 *frame_rate_base = strtol(cp+1, &cpp, 10);
2673 /* Finally we give up and parse it as double */
2674 AVRational time_base = av_d2q(strtod(arg, 0), DEFAULT_FRAME_RATE_BASE);
2675 *frame_rate_base = time_base.den;
2676 *frame_rate = time_base.num;
2678 if (!*frame_rate || !*frame_rate_base)
2685 * Converts date string to number of seconds since Jan 1st, 1970.
2689 * - If not a duration:
2690 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
2691 * Time is localtime unless Z is suffixed to the end. In this case GMT
2692 * Return the date in micro seconds since 1970
2695 * HH[:MM[:SS[.m...]]]
2699 #ifndef CONFIG_WINCE
2700 int64_t parse_date(const char *datestr, int duration)
2706 static const char *date_fmt[] = {
2710 static const char *time_fmt[] = {
2720 time_t now = time(0);
2722 len = strlen(datestr);
2724 lastch = datestr[len - 1];
2727 is_utc = (lastch == 'z' || lastch == 'Z');
2729 memset(&dt, 0, sizeof(dt));
2734 for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) {
2735 q = small_strptime(p, date_fmt[i], &dt);
2745 dt = *localtime(&now);
2747 dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
2752 if (*p == 'T' || *p == 't' || *p == ' ')
2755 for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) {
2756 q = small_strptime(p, time_fmt[i], &dt);
2766 q = small_strptime(p, time_fmt[0], &dt);
2768 dt.tm_sec = strtol(p, (char **)&q, 10);
2774 /* Now we have all the fields that we can get */
2779 return now * INT64_C(1000000);
2783 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
2785 dt.tm_isdst = -1; /* unknown */
2798 for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
2801 val += n * (*q - '0');
2805 return negative ? -t : t;
2807 #endif /* CONFIG_WINCE */
2810 * Attempts to find a specific tag in a URL.
2812 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
2813 * Return 1 if found.
2815 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
2825 while (*p != '\0' && *p != '=' && *p != '&') {
2826 if ((q - tag) < sizeof(tag) - 1)
2834 while (*p != '&' && *p != '\0') {
2835 if ((q - arg) < arg_size - 1) {
2845 if (!strcmp(tag, tag1))
2855 * Returns in 'buf' the path with '%d' replaced by number.
2857 * Also handles the '%0nd' format where 'n' is the total number
2858 * of digits and '%%'.
2860 * @param buf destination buffer
2861 * @param buf_size destination buffer size
2862 * @param path numbered sequence string
2863 * @number frame number
2864 * @return 0 if OK, -1 if format error.
2866 int av_get_frame_filename(char *buf, int buf_size,
2867 const char *path, int number)
2870 char *q, buf1[20], c;
2871 int nd, len, percentd_found;
2883 while (isdigit(*p)) {
2884 nd = nd * 10 + *p++ - '0';
2887 } while (isdigit(c));
2896 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
2898 if ((q - buf + len) > buf_size - 1)
2900 memcpy(q, buf1, len);
2908 if ((q - buf) < buf_size - 1)
2912 if (!percentd_found)
2922 * Print nice hexa dump of a buffer
2923 * @param f stream for output
2925 * @param size buffer size
2927 void av_hex_dump(FILE *f, uint8_t *buf, int size)
2931 for(i=0;i<size;i+=16) {
2935 fprintf(f, "%08x ", i);
2938 fprintf(f, " %02x", buf[i+j]);
2943 for(j=0;j<len;j++) {
2945 if (c < ' ' || c > '~')
2947 fprintf(f, "%c", c);
2954 * Print on 'f' a nice dump of a packet
2955 * @param f stream for output
2956 * @param pkt packet to dump
2957 * @param dump_payload true if the payload must be displayed too
2959 //FIXME needs to know the time_base
2960 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
2962 fprintf(f, "stream #%d:\n", pkt->stream_index);
2963 fprintf(f, " keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
2964 fprintf(f, " duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
2965 /* DTS is _always_ valid after av_read_frame() */
2966 fprintf(f, " dts=");
2967 if (pkt->dts == AV_NOPTS_VALUE)
2970 fprintf(f, "%0.3f", (double)pkt->dts / AV_TIME_BASE);
2971 /* PTS may be not known if B frames are present */
2972 fprintf(f, " pts=");
2973 if (pkt->pts == AV_NOPTS_VALUE)
2976 fprintf(f, "%0.3f", (double)pkt->pts / AV_TIME_BASE);
2978 fprintf(f, " size=%d\n", pkt->size);
2980 av_hex_dump(f, pkt->data, pkt->size);
2983 void url_split(char *proto, int proto_size,
2984 char *authorization, int authorization_size,
2985 char *hostname, int hostname_size,
2987 char *path, int path_size,
2998 while (*p != ':' && *p != '\0') {
2999 if ((q - proto) < proto_size - 1)
3005 if (authorization_size > 0)
3006 authorization[0] = '\0';
3010 if (hostname_size > 0)
3014 char *at,*slash; // PETR: position of '@' character and '/' character
3021 at = strchr(p,'@'); // PETR: get the position of '@'
3022 slash = strchr(p,'/'); // PETR: get position of '/' - end of hostname
3023 if (at && slash && at > slash) at = NULL; // PETR: not interested in '@' behind '/'
3025 q = at ? authorization : hostname; // PETR: if '@' exists starting with auth.
3027 while ((at || *p != ':') && *p != '/' && *p != '?' && *p != '\0') { // PETR:
3028 if (*p == '@') { // PETR: passed '@'
3029 if (authorization_size > 0)
3033 } else if (!at) { // PETR: hostname
3034 if ((q - hostname) < hostname_size - 1)
3037 if ((q - authorization) < authorization_size - 1)
3042 if (hostname_size > 0)
3046 port = strtoul(p, (char **)&p, 10);
3051 pstrcpy(path, path_size, p);
3055 * Set the pts for a given stream.
3058 * @param pts_wrap_bits number of bits effectively used by the pts
3059 * (used for wrap control, 33 is the value for MPEG)
3060 * @param pts_num numerator to convert to seconds (MPEG: 1)
3061 * @param pts_den denominator to convert to seconds (MPEG: 90000)
3063 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3064 int pts_num, int pts_den)
3066 s->pts_wrap_bits = pts_wrap_bits;
3067 s->time_base.num = pts_num;
3068 s->time_base.den = pts_den;
3071 /* fraction handling */
3074 * f = val + (num / den) + 0.5.
3076 * 'num' is normalized so that it is such as 0 <= num < den.
3078 * @param f fractional number
3079 * @param val integer value
3080 * @param num must be >= 0
3081 * @param den must be >= 1
3083 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
3096 * Fractionnal addition to f: f = f + (incr / f->den).
3098 * @param f fractional number
3099 * @param incr increment, can be positive or negative
3101 static void av_frac_add(AVFrac *f, int64_t incr)
3105 num = f->num + incr;
3108 f->val += num / den;
3114 } else if (num >= den) {
3115 f->val += num / den;