2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
32 * @file libavformat/utils.c
33 * various utility functions for use within FFmpeg
36 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
37 static void av_frac_add(AVFrac *f, int64_t incr);
39 /** head of registered input format linked list */
40 AVInputFormat *first_iformat = NULL;
41 /** head of registered output format linked list */
42 AVOutputFormat *first_oformat = NULL;
44 AVInputFormat *av_iformat_next(AVInputFormat *f)
47 else return first_iformat;
50 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
53 else return first_oformat;
56 void av_register_input_format(AVInputFormat *format)
60 while (*p != NULL) p = &(*p)->next;
65 void av_register_output_format(AVOutputFormat *format)
69 while (*p != NULL) p = &(*p)->next;
74 int match_ext(const char *filename, const char *extensions)
82 ext = strrchr(filename, '.');
88 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
91 if (!strcasecmp(ext1, ext))
101 AVOutputFormat *guess_format(const char *short_name, const char *filename,
102 const char *mime_type)
104 AVOutputFormat *fmt, *fmt_found;
105 int score_max, score;
107 /* specific test for image sequences */
108 #ifdef CONFIG_IMAGE2_MUXER
109 if (!short_name && filename &&
110 av_filename_number_test(filename) &&
111 av_guess_image2_codec(filename) != CODEC_ID_NONE) {
112 return guess_format("image2", NULL, NULL);
115 /* Find the proper file type. */
119 while (fmt != NULL) {
121 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
123 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
125 if (filename && fmt->extensions &&
126 match_ext(filename, fmt->extensions)) {
129 if (score > score_max) {
138 AVOutputFormat *guess_stream_format(const char *short_name, const char *filename,
139 const char *mime_type)
141 AVOutputFormat *fmt = guess_format(short_name, filename, mime_type);
144 AVOutputFormat *stream_fmt;
145 char stream_format_name[64];
147 snprintf(stream_format_name, sizeof(stream_format_name), "%s_stream", fmt->name);
148 stream_fmt = guess_format(stream_format_name, NULL, NULL);
157 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
158 const char *filename, const char *mime_type, enum CodecType type){
159 if(type == CODEC_TYPE_VIDEO){
160 enum CodecID codec_id= CODEC_ID_NONE;
162 #ifdef CONFIG_IMAGE2_MUXER
163 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
164 codec_id= av_guess_image2_codec(filename);
167 if(codec_id == CODEC_ID_NONE)
168 codec_id= fmt->video_codec;
170 }else if(type == CODEC_TYPE_AUDIO)
171 return fmt->audio_codec;
173 return CODEC_ID_NONE;
176 AVInputFormat *av_find_input_format(const char *short_name)
179 for(fmt = first_iformat; fmt != NULL; fmt = fmt->next) {
180 if (!strcmp(fmt->name, short_name))
186 /* memory handling */
188 void av_destruct_packet(AVPacket *pkt)
191 pkt->data = NULL; pkt->size = 0;
194 void av_init_packet(AVPacket *pkt)
196 pkt->pts = AV_NOPTS_VALUE;
197 pkt->dts = AV_NOPTS_VALUE;
201 pkt->stream_index = 0;
202 pkt->destruct= av_destruct_packet_nofree;
205 int av_new_packet(AVPacket *pkt, int size)
208 if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
209 return AVERROR(ENOMEM);
210 data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
212 return AVERROR(ENOMEM);
213 memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
218 pkt->destruct = av_destruct_packet;
222 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
224 int ret= av_new_packet(pkt, size);
229 pkt->pos= url_ftell(s);
231 ret= get_buffer(s, pkt->data, size);
240 int av_dup_packet(AVPacket *pkt)
242 if (pkt->destruct != av_destruct_packet) {
244 /* We duplicate the packet and don't forget to add the padding again. */
245 if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
246 return AVERROR(ENOMEM);
247 data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
249 return AVERROR(ENOMEM);
251 memcpy(data, pkt->data, pkt->size);
252 memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
254 pkt->destruct = av_destruct_packet;
259 int av_filename_number_test(const char *filename)
262 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
265 static AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
267 AVInputFormat *fmt1, *fmt;
271 for(fmt1 = first_iformat; fmt1 != NULL; fmt1 = fmt1->next) {
272 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
275 if (fmt1->read_probe) {
276 score = fmt1->read_probe(pd);
277 } else if (fmt1->extensions) {
278 if (match_ext(pd->filename, fmt1->extensions)) {
282 if (score > *score_max) {
290 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
292 return av_probe_input_format2(pd, is_opened, &score);
295 /************************************************************/
296 /* input media file */
299 * Open a media file from an IO stream. 'fmt' must be specified.
301 static const char* format_to_name(void* ptr)
303 AVFormatContext* fc = (AVFormatContext*) ptr;
304 if(fc->iformat) return fc->iformat->name;
305 else if(fc->oformat) return fc->oformat->name;
309 #define OFFSET(x) offsetof(AVFormatContext,x)
310 #define DEFAULT 0 //should be NAN but it does not work as it is not a constant in glibc as required by ANSI/ISO C
311 //these names are too long to be readable
312 #define E AV_OPT_FLAG_ENCODING_PARAM
313 #define D AV_OPT_FLAG_DECODING_PARAM
315 static const AVOption options[]={
316 {"probesize", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */
317 {"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
318 {"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
319 {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
320 {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
321 {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
322 {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
323 {"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
324 {"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 3*AV_TIME_BASE, 0, INT_MAX, D},
325 {"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D},
326 {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, INT_MAX, 0, INT_MAX, D},
334 static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
336 static void avformat_get_context_defaults(AVFormatContext *s)
338 memset(s, 0, sizeof(AVFormatContext));
340 s->av_class = &av_format_context_class;
342 av_opt_set_defaults(s);
345 AVFormatContext *av_alloc_format_context(void)
348 ic = av_malloc(sizeof(AVFormatContext));
350 avformat_get_context_defaults(ic);
351 ic->av_class = &av_format_context_class;
355 int av_open_input_stream(AVFormatContext **ic_ptr,
356 ByteIOContext *pb, const char *filename,
357 AVInputFormat *fmt, AVFormatParameters *ap)
361 AVFormatParameters default_ap;
365 memset(ap, 0, sizeof(default_ap));
368 if(!ap->prealloced_context)
369 ic = av_alloc_format_context();
373 err = AVERROR(ENOMEM);
378 ic->duration = AV_NOPTS_VALUE;
379 ic->start_time = AV_NOPTS_VALUE;
380 av_strlcpy(ic->filename, filename, sizeof(ic->filename));
382 /* allocate private data */
383 if (fmt->priv_data_size > 0) {
384 ic->priv_data = av_mallocz(fmt->priv_data_size);
385 if (!ic->priv_data) {
386 err = AVERROR(ENOMEM);
390 ic->priv_data = NULL;
393 err = ic->iformat->read_header(ic, ap);
397 if (pb && !ic->data_offset)
398 ic->data_offset = url_ftell(ic->pb);
404 av_freep(&ic->priv_data);
411 /** size of probe buffer, for guessing file type from file contents */
412 #define PROBE_BUF_MIN 2048
413 #define PROBE_BUF_MAX (1<<20)
415 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
418 AVFormatParameters *ap)
421 AVProbeData probe_data, *pd = &probe_data;
422 ByteIOContext *pb = NULL;
426 pd->filename = filename;
431 /* guess format if no file can be opened */
432 fmt = av_probe_input_format(pd, 0);
435 /* Do not open file if the format does not need it. XXX: specific
436 hack needed to handle RTSP/TCP */
437 if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
438 /* if no file needed do not try to open one */
439 if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) {
443 url_setbufsize(pb, buf_size);
446 for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){
447 int score= probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX/4 : 0;
448 /* read probe data */
449 pd->buf= av_realloc(pd->buf, probe_size + AVPROBE_PADDING_SIZE);
450 pd->buf_size = get_buffer(pb, pd->buf, probe_size);
451 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
452 if (url_fseek(pb, 0, SEEK_SET) < 0) {
454 if (url_fopen(&pb, filename, URL_RDONLY) < 0) {
460 /* guess file format */
461 fmt = av_probe_input_format2(pd, 1, &score);
466 /* if still no format found, error */
472 /* check filename in case an image number is expected */
473 if (fmt->flags & AVFMT_NEEDNUMBER) {
474 if (!av_filename_number_test(filename)) {
475 err = AVERROR_NUMEXPECTED;
479 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
492 /*******************************************************/
494 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
499 ret= s->iformat->read_packet(s, pkt);
502 st= s->streams[pkt->stream_index];
504 switch(st->codec->codec_type){
505 case CODEC_TYPE_VIDEO:
506 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
508 case CODEC_TYPE_AUDIO:
509 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
511 case CODEC_TYPE_SUBTITLE:
512 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
519 /**********************************************************/
522 * Get the number of samples of an audio frame. Return -1 on error.
524 static int get_audio_frame_size(AVCodecContext *enc, int size)
528 if (enc->frame_size <= 1) {
529 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
531 if (bits_per_sample) {
532 if (enc->channels == 0)
534 frame_size = (size << 3) / (bits_per_sample * enc->channels);
536 /* used for example by ADPCM codecs */
537 if (enc->bit_rate == 0)
539 frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate;
542 frame_size = enc->frame_size;
549 * Return the frame duration in seconds. Return 0 if not available.
551 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
552 AVCodecParserContext *pc, AVPacket *pkt)
558 switch(st->codec->codec_type) {
559 case CODEC_TYPE_VIDEO:
560 if(st->time_base.num*1000LL > st->time_base.den){
561 *pnum = st->time_base.num;
562 *pden = st->time_base.den;
563 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
564 *pnum = st->codec->time_base.num;
565 *pden = st->codec->time_base.den;
566 if (pc && pc->repeat_pict) {
568 *pnum = (*pnum) * (2 + pc->repeat_pict);
572 case CODEC_TYPE_AUDIO:
573 frame_size = get_audio_frame_size(st->codec, pkt->size);
577 *pden = st->codec->sample_rate;
584 static int is_intra_only(AVCodecContext *enc){
585 if(enc->codec_type == CODEC_TYPE_AUDIO){
587 }else if(enc->codec_type == CODEC_TYPE_VIDEO){
588 switch(enc->codec_id){
590 case CODEC_ID_MJPEGB:
592 case CODEC_ID_RAWVIDEO:
593 case CODEC_ID_DVVIDEO:
594 case CODEC_ID_HUFFYUV:
595 case CODEC_ID_FFVHUFF:
606 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
607 int64_t dts, int64_t pts)
609 AVStream *st= s->streams[stream_index];
610 AVPacketList *pktl= s->packet_buffer;
612 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE)
615 st->first_dts= dts - st->cur_dts;
618 for(; pktl; pktl= pktl->next){
619 if(pktl->pkt.stream_index != stream_index)
621 //FIXME think more about this check
622 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
623 pktl->pkt.pts += st->first_dts;
625 if(pktl->pkt.dts != AV_NOPTS_VALUE)
626 pktl->pkt.dts += st->first_dts;
628 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
629 st->start_time= pktl->pkt.pts;
631 if (st->start_time == AV_NOPTS_VALUE)
632 st->start_time = pts;
635 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
636 AVCodecParserContext *pc, AVPacket *pkt)
638 int num, den, presentation_delayed, delay, i;
641 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
642 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
643 pkt->dts -= 1LL<<st->pts_wrap_bits;
646 if (pkt->duration == 0) {
647 compute_frame_duration(&num, &den, st, pc, pkt);
649 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
653 /* correct timestamps with byte offset if demuxers only have timestamps
654 on packet boundaries */
655 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
656 /* this will estimate bitrate based on this frame's duration and size */
657 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
658 if(pkt->pts != AV_NOPTS_VALUE)
660 if(pkt->dts != AV_NOPTS_VALUE)
664 /* do we have a video B-frame ? */
665 delay= st->codec->has_b_frames;
666 presentation_delayed = 0;
667 /* XXX: need has_b_frame, but cannot get it if the codec is
670 pc && pc->pict_type != FF_B_TYPE)
671 presentation_delayed = 1;
672 /* This may be redundant, but it should not hurt. */
673 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
674 presentation_delayed = 1;
676 if(st->cur_dts == AV_NOPTS_VALUE){
677 st->cur_dts = 0; //FIXME maybe set it to 0 during init
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 */
683 if (presentation_delayed) {
684 /* DTS = decompression timestamp */
685 /* PTS = presentation timestamp */
686 if (pkt->dts == AV_NOPTS_VALUE)
687 pkt->dts = st->last_IP_pts;
688 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
689 if (pkt->dts == AV_NOPTS_VALUE)
690 pkt->dts = st->cur_dts;
692 /* this is tricky: the dts must be incremented by the duration
693 of the frame we are displaying, i.e. the last I- or P-frame */
694 if (st->last_IP_duration == 0)
695 st->last_IP_duration = pkt->duration;
696 st->cur_dts = pkt->dts + st->last_IP_duration;
697 st->last_IP_duration = pkt->duration;
698 st->last_IP_pts= pkt->pts;
699 /* cannot compute PTS if not present (we can compute it only
700 by knowing the future */
701 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
702 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
703 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
704 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
705 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
706 pkt->pts += pkt->duration;
707 // 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);
711 /* presentation is not delayed : PTS and DTS are the same */
712 if(pkt->pts == AV_NOPTS_VALUE)
714 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
715 if(pkt->pts == AV_NOPTS_VALUE)
716 pkt->pts = st->cur_dts;
718 st->cur_dts = pkt->pts + pkt->duration;
722 if(pkt->pts != AV_NOPTS_VALUE){
723 st->pts_buffer[0]= pkt->pts;
724 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
725 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
726 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
727 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
728 if(pkt->dts == AV_NOPTS_VALUE)
729 pkt->dts= st->pts_buffer[0];
731 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
733 if(pkt->dts > st->cur_dts)
734 st->cur_dts = pkt->dts;
737 // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
740 if(is_intra_only(st->codec))
741 pkt->flags |= PKT_FLAG_KEY;
744 /* keyframe computation */
745 if (pc->pict_type == FF_I_TYPE)
746 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)
763 /* select current input stream component */
766 if (!st->need_parsing || !st->parser) {
767 /* no parsing needed: we just output the packet as is */
768 /* raw data support */
770 compute_pkt_fields(s, st, NULL, pkt);
773 } else if (s->cur_len > 0 && st->discard < AVDISCARD_ALL) {
774 len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size,
775 s->cur_ptr, s->cur_len,
776 s->cur_pkt.pts, s->cur_pkt.dts);
777 s->cur_pkt.pts = AV_NOPTS_VALUE;
778 s->cur_pkt.dts = AV_NOPTS_VALUE;
779 /* increment read pointer */
783 /* return packet if any */
786 pkt->pos = s->cur_pkt.pos; // Isn't quite accurate but close.
788 pkt->stream_index = st->index;
789 pkt->pts = st->parser->pts;
790 pkt->dts = st->parser->dts;
791 pkt->destruct = av_destruct_packet_nofree;
792 compute_pkt_fields(s, st, st->parser, pkt);
794 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & PKT_FLAG_KEY){
795 ff_reduce_index(s, st->index);
796 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
797 0, 0, AVINDEX_KEYFRAME);
804 av_free_packet(&s->cur_pkt);
808 /* read next packet */
809 ret = av_read_packet(s, &s->cur_pkt);
811 if (ret == AVERROR(EAGAIN))
813 /* return the last frames, if any */
814 for(i = 0; i < s->nb_streams; i++) {
816 if (st->parser && st->need_parsing) {
817 av_parser_parse(st->parser, st->codec,
818 &pkt->data, &pkt->size,
820 AV_NOPTS_VALUE, AV_NOPTS_VALUE);
825 /* no more packets: really terminate parsing */
829 st = s->streams[s->cur_pkt.stream_index];
830 if(st->codec->debug & FF_DEBUG_PTS)
831 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
832 s->cur_pkt.stream_index,
838 s->cur_ptr = s->cur_pkt.data;
839 s->cur_len = s->cur_pkt.size;
840 if (st->need_parsing && !st->parser) {
841 st->parser = av_parser_init(st->codec->codec_id);
843 /* no parser available: just output the raw packets */
844 st->need_parsing = AVSTREAM_PARSE_NONE;
845 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
846 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
848 if(st->parser && (s->iformat->flags & AVFMT_GENERIC_INDEX)){
849 st->parser->last_frame_offset=
850 st->parser->cur_offset= s->cur_pkt.pos;
855 if(st->codec->debug & FF_DEBUG_PTS)
856 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
865 static AVPacket *add_to_pktbuf(AVFormatContext *s, AVPacket *pkt){
866 AVPacketList *pktl= s->packet_buffer;
867 AVPacketList **plast_pktl= &s->packet_buffer;
869 while(*plast_pktl) plast_pktl= &(*plast_pktl)->next; //FIXME maybe maintain pointer to the last?
871 pktl = av_mallocz(sizeof(AVPacketList));
875 /* add the packet in the buffered packet list */
881 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
885 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
888 pktl = s->packet_buffer;
890 AVPacket *next_pkt= &pktl->pkt;
892 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
893 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
894 if( pktl->pkt.stream_index == next_pkt->stream_index
895 && next_pkt->dts < pktl->pkt.dts
896 && pktl->pkt.pts != pktl->pkt.dts //not b frame
897 /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
898 next_pkt->pts= pktl->pkt.dts;
902 pktl = s->packet_buffer;
905 if( next_pkt->pts != AV_NOPTS_VALUE
906 || next_pkt->dts == AV_NOPTS_VALUE
908 /* read packet from packet buffer, if there is data */
910 s->packet_buffer = pktl->next;
916 int ret= av_read_frame_internal(s, pkt);
918 if(pktl && ret != AVERROR(EAGAIN)){
925 if(av_dup_packet(add_to_pktbuf(s, pkt)) < 0)
926 return AVERROR(ENOMEM);
928 assert(!s->packet_buffer);
929 return av_read_frame_internal(s, pkt);
934 /* XXX: suppress the packet queue */
935 static void flush_packet_queue(AVFormatContext *s)
940 pktl = s->packet_buffer;
943 s->packet_buffer = pktl->next;
944 av_free_packet(&pktl->pkt);
949 /*******************************************************/
952 int av_find_default_stream_index(AVFormatContext *s)
957 if (s->nb_streams <= 0)
959 for(i = 0; i < s->nb_streams; i++) {
961 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
969 * Flush the frame reader.
971 static void av_read_frame_flush(AVFormatContext *s)
976 flush_packet_queue(s);
978 /* free previous packet */
980 if (s->cur_st->parser)
981 av_free_packet(&s->cur_pkt);
988 /* for each stream, reset read state */
989 for(i = 0; i < s->nb_streams; i++) {
993 av_parser_close(st->parser);
996 st->last_IP_pts = AV_NOPTS_VALUE;
997 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1001 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1004 for(i = 0; i < s->nb_streams; i++) {
1005 AVStream *st = s->streams[i];
1007 st->cur_dts = av_rescale(timestamp,
1008 st->time_base.den * (int64_t)ref_st->time_base.num,
1009 st->time_base.num * (int64_t)ref_st->time_base.den);
1013 void ff_reduce_index(AVFormatContext *s, int stream_index)
1015 AVStream *st= s->streams[stream_index];
1016 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1018 if((unsigned)st->nb_index_entries >= max_entries){
1020 for(i=0; 2*i<st->nb_index_entries; i++)
1021 st->index_entries[i]= st->index_entries[2*i];
1022 st->nb_index_entries= i;
1026 int av_add_index_entry(AVStream *st,
1027 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1029 AVIndexEntry *entries, *ie;
1032 if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1035 entries = av_fast_realloc(st->index_entries,
1036 &st->index_entries_allocated_size,
1037 (st->nb_index_entries + 1) *
1038 sizeof(AVIndexEntry));
1042 st->index_entries= entries;
1044 index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
1047 index= st->nb_index_entries++;
1048 ie= &entries[index];
1049 assert(index==0 || ie[-1].timestamp < timestamp);
1051 ie= &entries[index];
1052 if(ie->timestamp != timestamp){
1053 if(ie->timestamp <= timestamp)
1055 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
1056 st->nb_index_entries++;
1057 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1058 distance= ie->min_distance;
1062 ie->timestamp = timestamp;
1063 ie->min_distance= distance;
1070 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1073 AVIndexEntry *entries= st->index_entries;
1074 int nb_entries= st->nb_index_entries;
1083 timestamp = entries[m].timestamp;
1084 if(timestamp >= wanted_timestamp)
1086 if(timestamp <= wanted_timestamp)
1089 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1091 if(!(flags & AVSEEK_FLAG_ANY)){
1092 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1093 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1104 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1105 AVInputFormat *avif= s->iformat;
1106 int64_t pos_min, pos_max, pos, pos_limit;
1107 int64_t ts_min, ts_max, ts;
1111 if (stream_index < 0)
1115 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1119 ts_min= AV_NOPTS_VALUE;
1120 pos_limit= -1; //gcc falsely says it may be uninitialized
1122 st= s->streams[stream_index];
1123 if(st->index_entries){
1126 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()
1127 index= FFMAX(index, 0);
1128 e= &st->index_entries[index];
1130 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1132 ts_min= e->timestamp;
1134 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1141 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1142 assert(index < st->nb_index_entries);
1144 e= &st->index_entries[index];
1145 assert(e->timestamp >= target_ts);
1147 ts_max= e->timestamp;
1148 pos_limit= pos_max - e->min_distance;
1150 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1151 pos_max,pos_limit, ts_max);
1156 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1161 url_fseek(s->pb, pos, SEEK_SET);
1163 av_update_cur_dts(s, st, ts);
1168 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 )){
1170 int64_t start_pos, filesize;
1174 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1177 if(ts_min == AV_NOPTS_VALUE){
1178 pos_min = s->data_offset;
1179 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1180 if (ts_min == AV_NOPTS_VALUE)
1184 if(ts_max == AV_NOPTS_VALUE){
1186 filesize = url_fsize(s->pb);
1187 pos_max = filesize - 1;
1190 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1192 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1193 if (ts_max == AV_NOPTS_VALUE)
1197 int64_t tmp_pos= pos_max + 1;
1198 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1199 if(tmp_ts == AV_NOPTS_VALUE)
1203 if(tmp_pos >= filesize)
1209 if(ts_min > ts_max){
1211 }else if(ts_min == ts_max){
1216 while (pos_min < pos_limit) {
1218 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1222 assert(pos_limit <= pos_max);
1225 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1226 // interpolate position (better than dichotomy)
1227 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1228 + pos_min - approximate_keyframe_distance;
1229 }else if(no_change==1){
1230 // bisection, if interpolation failed to change min or max pos last time
1231 pos = (pos_min + pos_limit)>>1;
1233 /* linear search if bisection failed, can only happen if there
1234 are very few or no keyframes between min/max */
1239 else if(pos > pos_limit)
1243 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1249 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);
1251 if(ts == AV_NOPTS_VALUE){
1252 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1255 assert(ts != AV_NOPTS_VALUE);
1256 if (target_ts <= ts) {
1257 pos_limit = start_pos - 1;
1261 if (target_ts >= ts) {
1267 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1268 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1271 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1273 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1274 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1275 pos, ts_min, target_ts, ts_max);
1281 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1282 int64_t pos_min, pos_max;
1286 if (stream_index < 0)
1289 st= s->streams[stream_index];
1292 pos_min = s->data_offset;
1293 pos_max = url_fsize(s->pb) - 1;
1295 if (pos < pos_min) pos= pos_min;
1296 else if(pos > pos_max) pos= pos_max;
1298 url_fseek(s->pb, pos, SEEK_SET);
1301 av_update_cur_dts(s, st, ts);
1306 static int av_seek_frame_generic(AVFormatContext *s,
1307 int stream_index, int64_t timestamp, int flags)
1313 st = s->streams[stream_index];
1315 index = av_index_search_timestamp(st, timestamp, flags);
1317 if(index < 0 || index==st->nb_index_entries-1){
1321 if(st->index_entries && st->nb_index_entries){
1322 ie= &st->index_entries[st->nb_index_entries-1];
1323 url_fseek(s->pb, ie->pos, SEEK_SET);
1324 av_update_cur_dts(s, st, ie->timestamp);
1326 url_fseek(s->pb, 0, SEEK_SET);
1329 int ret = av_read_frame(s, &pkt);
1332 av_free_packet(&pkt);
1333 if(stream_index == pkt.stream_index){
1334 if((pkt.flags & PKT_FLAG_KEY) && pkt.dts > timestamp)
1338 index = av_index_search_timestamp(st, timestamp, flags);
1343 av_read_frame_flush(s);
1344 if (s->iformat->read_seek){
1345 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1348 ie = &st->index_entries[index];
1349 url_fseek(s->pb, ie->pos, SEEK_SET);
1351 av_update_cur_dts(s, st, ie->timestamp);
1356 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1361 av_read_frame_flush(s);
1363 if(flags & AVSEEK_FLAG_BYTE)
1364 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1366 if(stream_index < 0){
1367 stream_index= av_find_default_stream_index(s);
1368 if(stream_index < 0)
1371 st= s->streams[stream_index];
1372 /* timestamp for default must be expressed in AV_TIME_BASE units */
1373 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1375 st= s->streams[stream_index];
1377 /* first, we try the format specific seek */
1378 if (s->iformat->read_seek)
1379 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1386 if(s->iformat->read_timestamp)
1387 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1389 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1392 /*******************************************************/
1395 * Returns TRUE if the stream has accurate duration in any stream.
1397 * @return TRUE if the stream has accurate duration for at least one component.
1399 static int av_has_duration(AVFormatContext *ic)
1404 for(i = 0;i < ic->nb_streams; i++) {
1405 st = ic->streams[i];
1406 if (st->duration != AV_NOPTS_VALUE)
1413 * Estimate the stream timings from the one of each components.
1415 * Also computes the global bitrate if possible.
1417 static void av_update_stream_timings(AVFormatContext *ic)
1419 int64_t start_time, start_time1, end_time, end_time1;
1420 int64_t duration, duration1;
1424 start_time = INT64_MAX;
1425 end_time = INT64_MIN;
1426 duration = INT64_MIN;
1427 for(i = 0;i < ic->nb_streams; i++) {
1428 st = ic->streams[i];
1429 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1430 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1431 if (start_time1 < start_time)
1432 start_time = start_time1;
1433 if (st->duration != AV_NOPTS_VALUE) {
1434 end_time1 = start_time1
1435 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1436 if (end_time1 > end_time)
1437 end_time = end_time1;
1440 if (st->duration != AV_NOPTS_VALUE) {
1441 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1442 if (duration1 > duration)
1443 duration = duration1;
1446 if (start_time != INT64_MAX) {
1447 ic->start_time = start_time;
1448 if (end_time != INT64_MIN) {
1449 if (end_time - start_time > duration)
1450 duration = end_time - start_time;
1453 if (duration != INT64_MIN) {
1454 ic->duration = duration;
1455 if (ic->file_size > 0) {
1456 /* compute the bitrate */
1457 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1458 (double)ic->duration;
1463 static void fill_all_stream_timings(AVFormatContext *ic)
1468 av_update_stream_timings(ic);
1469 for(i = 0;i < ic->nb_streams; i++) {
1470 st = ic->streams[i];
1471 if (st->start_time == AV_NOPTS_VALUE) {
1472 if(ic->start_time != AV_NOPTS_VALUE)
1473 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1474 if(ic->duration != AV_NOPTS_VALUE)
1475 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1480 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1482 int64_t filesize, duration;
1486 /* if bit_rate is already set, we believe it */
1487 if (ic->bit_rate == 0) {
1489 for(i=0;i<ic->nb_streams;i++) {
1490 st = ic->streams[i];
1491 bit_rate += st->codec->bit_rate;
1493 ic->bit_rate = bit_rate;
1496 /* if duration is already set, we believe it */
1497 if (ic->duration == AV_NOPTS_VALUE &&
1498 ic->bit_rate != 0 &&
1499 ic->file_size != 0) {
1500 filesize = ic->file_size;
1502 for(i = 0; i < ic->nb_streams; i++) {
1503 st = ic->streams[i];
1504 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1505 if (st->duration == AV_NOPTS_VALUE)
1506 st->duration = duration;
1512 #define DURATION_MAX_READ_SIZE 250000
1514 /* only usable for MPEG-PS streams */
1515 static void av_estimate_timings_from_pts(AVFormatContext *ic, offset_t old_offset)
1517 AVPacket pkt1, *pkt = &pkt1;
1519 int read_size, i, ret;
1521 int64_t filesize, offset, duration;
1523 /* free previous packet */
1524 if (ic->cur_st && ic->cur_st->parser)
1525 av_free_packet(&ic->cur_pkt);
1528 /* flush packet queue */
1529 flush_packet_queue(ic);
1531 for(i=0;i<ic->nb_streams;i++) {
1532 st = ic->streams[i];
1534 av_parser_close(st->parser);
1539 /* we read the first packets to get the first PTS (not fully
1540 accurate, but it is enough now) */
1541 url_fseek(ic->pb, 0, SEEK_SET);
1544 if (read_size >= DURATION_MAX_READ_SIZE)
1546 /* if all info is available, we can stop */
1547 for(i = 0;i < ic->nb_streams; i++) {
1548 st = ic->streams[i];
1549 if (st->start_time == AV_NOPTS_VALUE)
1552 if (i == ic->nb_streams)
1555 ret = av_read_packet(ic, pkt);
1558 read_size += pkt->size;
1559 st = ic->streams[pkt->stream_index];
1560 if (pkt->pts != AV_NOPTS_VALUE) {
1561 if (st->start_time == AV_NOPTS_VALUE)
1562 st->start_time = pkt->pts;
1564 av_free_packet(pkt);
1567 /* estimate the end time (duration) */
1568 /* XXX: may need to support wrapping */
1569 filesize = ic->file_size;
1570 offset = filesize - DURATION_MAX_READ_SIZE;
1574 url_fseek(ic->pb, offset, SEEK_SET);
1577 if (read_size >= DURATION_MAX_READ_SIZE)
1580 ret = av_read_packet(ic, pkt);
1583 read_size += pkt->size;
1584 st = ic->streams[pkt->stream_index];
1585 if (pkt->pts != AV_NOPTS_VALUE &&
1586 st->start_time != AV_NOPTS_VALUE) {
1587 end_time = pkt->pts;
1588 duration = end_time - st->start_time;
1590 if (st->duration == AV_NOPTS_VALUE ||
1591 st->duration < duration)
1592 st->duration = duration;
1595 av_free_packet(pkt);
1598 fill_all_stream_timings(ic);
1600 url_fseek(ic->pb, old_offset, SEEK_SET);
1601 for(i=0; i<ic->nb_streams; i++){
1603 st->cur_dts= st->first_dts;
1604 st->last_IP_pts = AV_NOPTS_VALUE;
1608 static void av_estimate_timings(AVFormatContext *ic, offset_t old_offset)
1612 /* get the file size, if possible */
1613 if (ic->iformat->flags & AVFMT_NOFILE) {
1616 file_size = url_fsize(ic->pb);
1620 ic->file_size = file_size;
1622 if ((!strcmp(ic->iformat->name, "mpeg") ||
1623 !strcmp(ic->iformat->name, "mpegts")) &&
1624 file_size && !url_is_streamed(ic->pb)) {
1625 /* get accurate estimate from the PTSes */
1626 av_estimate_timings_from_pts(ic, old_offset);
1627 } else if (av_has_duration(ic)) {
1628 /* at least one component has timings - we use them for all
1630 fill_all_stream_timings(ic);
1632 /* less precise: use bitrate info */
1633 av_estimate_timings_from_bit_rate(ic);
1635 av_update_stream_timings(ic);
1641 for(i = 0;i < ic->nb_streams; i++) {
1642 st = ic->streams[i];
1643 printf("%d: start_time: %0.3f duration: %0.3f\n",
1644 i, (double)st->start_time / AV_TIME_BASE,
1645 (double)st->duration / AV_TIME_BASE);
1647 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1648 (double)ic->start_time / AV_TIME_BASE,
1649 (double)ic->duration / AV_TIME_BASE,
1650 ic->bit_rate / 1000);
1655 static int has_codec_parameters(AVCodecContext *enc)
1658 switch(enc->codec_type) {
1659 case CODEC_TYPE_AUDIO:
1660 val = enc->sample_rate;
1662 case CODEC_TYPE_VIDEO:
1663 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
1669 return (enc->codec_id != CODEC_ID_NONE && val != 0);
1672 static int try_decode_frame(AVStream *st, const uint8_t *data, int size)
1676 int got_picture, data_size, ret=0;
1679 if(!st->codec->codec){
1680 codec = avcodec_find_decoder(st->codec->codec_id);
1683 ret = avcodec_open(st->codec, codec);
1688 if(!has_codec_parameters(st->codec)){
1689 switch(st->codec->codec_type) {
1690 case CODEC_TYPE_VIDEO:
1691 ret = avcodec_decode_video(st->codec, &picture,
1692 &got_picture, (uint8_t *)data, size);
1694 case CODEC_TYPE_AUDIO:
1695 data_size = FFMAX(size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
1696 samples = av_malloc(data_size);
1699 ret = avcodec_decode_audio2(st->codec, samples,
1700 &data_size, (uint8_t *)data, size);
1711 static int set_codec_from_probe_data(AVStream *st, AVProbeData *pd, int score)
1714 fmt = av_probe_input_format2(pd, 1, &score);
1717 if (strncmp(fmt->name, "mp3", 3) == 0)
1718 st->codec->codec_id = CODEC_ID_MP3;
1719 else if (strncmp(fmt->name, "ac3", 3) == 0)
1720 st->codec->codec_id = CODEC_ID_AC3;
1725 unsigned int codec_get_tag(const AVCodecTag *tags, int id)
1727 while (tags->id != CODEC_ID_NONE) {
1735 enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag)
1738 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
1739 if(tag == tags[i].tag)
1742 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
1743 if( toupper((tag >> 0)&0xFF) == toupper((tags[i].tag >> 0)&0xFF)
1744 && toupper((tag >> 8)&0xFF) == toupper((tags[i].tag >> 8)&0xFF)
1745 && toupper((tag >>16)&0xFF) == toupper((tags[i].tag >>16)&0xFF)
1746 && toupper((tag >>24)&0xFF) == toupper((tags[i].tag >>24)&0xFF))
1749 return CODEC_ID_NONE;
1752 unsigned int av_codec_get_tag(const AVCodecTag *tags[4], enum CodecID id)
1755 for(i=0; tags && tags[i]; i++){
1756 int tag= codec_get_tag(tags[i], id);
1762 enum CodecID av_codec_get_id(const AVCodecTag *tags[4], unsigned int tag)
1765 for(i=0; tags && tags[i]; i++){
1766 enum CodecID id= codec_get_id(tags[i], tag);
1767 if(id!=CODEC_ID_NONE) return id;
1769 return CODEC_ID_NONE;
1772 /* absolute maximum size we read until we abort */
1773 #define MAX_READ_SIZE 5000000
1775 #define MAX_STD_TIMEBASES (60*12+5)
1776 static int get_std_framerate(int i){
1777 if(i<60*12) return i*1001;
1778 else return ((int[]){24,30,60,12,15})[i-60*12]*1000*12;
1782 * Is the time base unreliable.
1783 * This is a heuristic to balance between quick acceptance of the values in
1784 * the headers vs. some extra checks.
1785 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
1786 * MPEG-2 commonly misuses field repeat flags to store different framerates.
1787 * And there are "variable" fps files this needs to detect as well.
1789 static int tb_unreliable(AVCodecContext *c){
1790 if( c->time_base.den >= 101L*c->time_base.num
1791 || c->time_base.den < 5L*c->time_base.num
1792 /* || c->codec_tag == ff_get_fourcc("DIVX")
1793 || c->codec_tag == ff_get_fourcc("XVID")*/
1794 || c->codec_id == CODEC_ID_MPEG2VIDEO)
1799 int av_find_stream_info(AVFormatContext *ic)
1801 int i, count, ret, read_size, j;
1803 AVPacket pkt1, *pkt;
1804 int64_t last_dts[MAX_STREAMS];
1805 int duration_count[MAX_STREAMS]={0};
1806 double (*duration_error)[MAX_STD_TIMEBASES];
1807 offset_t old_offset = url_ftell(ic->pb);
1808 int64_t codec_info_duration[MAX_STREAMS]={0};
1809 int codec_info_nb_frames[MAX_STREAMS]={0};
1810 AVProbeData probe_data[MAX_STREAMS];
1811 int codec_identified[MAX_STREAMS]={0};
1813 duration_error = av_mallocz(MAX_STREAMS * sizeof(*duration_error));
1814 if (!duration_error) return AVERROR(ENOMEM);
1816 for(i=0;i<ic->nb_streams;i++) {
1817 st = ic->streams[i];
1818 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
1819 /* if(!st->time_base.num)
1821 if(!st->codec->time_base.num)
1822 st->codec->time_base= st->time_base;
1824 //only for the split stuff
1826 st->parser = av_parser_init(st->codec->codec_id);
1827 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
1828 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1833 for(i=0;i<MAX_STREAMS;i++){
1834 last_dts[i]= AV_NOPTS_VALUE;
1837 memset(probe_data, 0, sizeof(probe_data));
1841 /* check if one codec still needs to be handled */
1842 for(i=0;i<ic->nb_streams;i++) {
1843 st = ic->streams[i];
1844 if (!has_codec_parameters(st->codec))
1846 /* variable fps and no guess at the real fps */
1847 if( tb_unreliable(st->codec)
1848 && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
1850 if(st->parser && st->parser->parser->split && !st->codec->extradata)
1852 if(st->first_dts == AV_NOPTS_VALUE)
1855 if (i == ic->nb_streams) {
1856 /* NOTE: if the format has no header, then we need to read
1857 some packets to get most of the streams, so we cannot
1859 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
1860 /* if we found the info for all the codecs, we can stop */
1865 /* we did not get all the codec info, but we read too much data */
1866 if (read_size >= MAX_READ_SIZE) {
1871 /* NOTE: a new stream can be added there if no header in file
1872 (AVFMTCTX_NOHEADER) */
1873 ret = av_read_frame_internal(ic, &pkt1);
1876 ret = -1; /* we could not have all the codec parameters before EOF */
1877 for(i=0;i<ic->nb_streams;i++) {
1878 st = ic->streams[i];
1879 if (!has_codec_parameters(st->codec)){
1881 avcodec_string(buf, sizeof(buf), st->codec, 0);
1882 av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
1890 pkt= add_to_pktbuf(ic, &pkt1);
1891 if(av_dup_packet(pkt) < 0)
1892 return AVERROR(ENOMEM);
1894 read_size += pkt->size;
1896 st = ic->streams[pkt->stream_index];
1897 if(codec_info_nb_frames[st->index]>1)
1898 codec_info_duration[st->index] += pkt->duration;
1899 if (pkt->duration != 0)
1900 codec_info_nb_frames[st->index]++;
1903 int index= pkt->stream_index;
1904 int64_t last= last_dts[index];
1905 int64_t duration= pkt->dts - last;
1907 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
1908 double dur= duration * av_q2d(st->time_base);
1910 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
1911 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
1912 if(duration_count[index] < 2)
1913 memset(duration_error, 0, MAX_STREAMS * sizeof(*duration_error));
1914 for(i=1; i<MAX_STD_TIMEBASES; i++){
1915 int framerate= get_std_framerate(i);
1916 int ticks= lrintf(dur*framerate/(1001*12));
1917 double error= dur - ticks*1001*12/(double)framerate;
1918 duration_error[index][i] += error*error;
1920 duration_count[index]++;
1922 if(last == AV_NOPTS_VALUE || duration_count[index]<=1)
1923 last_dts[pkt->stream_index]= pkt->dts;
1925 if (st->codec->codec_id == CODEC_ID_NONE) {
1926 AVProbeData *pd = &(probe_data[st->index]);
1927 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
1928 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
1929 pd->buf_size += pkt->size;
1930 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
1933 if(st->parser && st->parser->parser->split && !st->codec->extradata){
1934 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
1936 st->codec->extradata_size= i;
1937 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1938 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
1939 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1943 /* if still no information, we try to open the codec and to
1944 decompress the frame. We try to avoid that in most cases as
1945 it takes longer and uses more memory. For MPEG-4, we need to
1946 decompress for QuickTime. */
1947 if (!has_codec_parameters(st->codec) /*&&
1948 (st->codec->codec_id == CODEC_ID_FLV1 ||
1949 st->codec->codec_id == CODEC_ID_H264 ||
1950 st->codec->codec_id == CODEC_ID_H263 ||
1951 st->codec->codec_id == CODEC_ID_H261 ||
1952 st->codec->codec_id == CODEC_ID_VORBIS ||
1953 st->codec->codec_id == CODEC_ID_MJPEG ||
1954 st->codec->codec_id == CODEC_ID_PNG ||
1955 st->codec->codec_id == CODEC_ID_PAM ||
1956 st->codec->codec_id == CODEC_ID_PGM ||
1957 st->codec->codec_id == CODEC_ID_PGMYUV ||
1958 st->codec->codec_id == CODEC_ID_PBM ||
1959 st->codec->codec_id == CODEC_ID_PPM ||
1960 st->codec->codec_id == CODEC_ID_SHORTEN ||
1961 (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
1962 try_decode_frame(st, pkt->data, pkt->size);
1964 if (st->time_base.den > 0 && av_rescale_q(codec_info_duration[st->index], st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
1970 // close codecs which where opened in try_decode_frame()
1971 for(i=0;i<ic->nb_streams;i++) {
1972 st = ic->streams[i];
1973 if(st->codec->codec)
1974 avcodec_close(st->codec);
1976 for(i=0;i<ic->nb_streams;i++) {
1977 st = ic->streams[i];
1978 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
1979 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample)
1980 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
1982 if(duration_count[i]
1983 && tb_unreliable(st->codec) /*&&
1984 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
1985 st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
1986 double best_error= 2*av_q2d(st->time_base);
1987 best_error= best_error*best_error*duration_count[i]*1000*12*30;
1989 for(j=1; j<MAX_STD_TIMEBASES; j++){
1990 double error= duration_error[i][j] * get_std_framerate(j);
1991 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
1992 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
1993 if(error < best_error){
1995 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 12*1001, INT_MAX);
2000 if (!st->r_frame_rate.num){
2001 if( st->codec->time_base.den * (int64_t)st->time_base.num
2002 <= st->codec->time_base.num * (int64_t)st->time_base.den){
2003 st->r_frame_rate.num = st->codec->time_base.den;
2004 st->r_frame_rate.den = st->codec->time_base.num;
2006 st->r_frame_rate.num = st->time_base.den;
2007 st->r_frame_rate.den = st->time_base.num;
2010 }else if(st->codec->codec_type == CODEC_TYPE_AUDIO) {
2011 if (st->codec->codec_id == CODEC_ID_NONE && probe_data[st->index].buf_size > 0) {
2012 codec_identified[st->index] = set_codec_from_probe_data(st, &(probe_data[st->index]), 1);
2013 if (codec_identified[st->index]) {
2014 st->need_parsing = AVSTREAM_PARSE_FULL;
2017 if(!st->codec->bits_per_sample)
2018 st->codec->bits_per_sample= av_get_bits_per_sample(st->codec->codec_id);
2022 av_estimate_timings(ic, old_offset);
2024 for(i=0;i<ic->nb_streams;i++) {
2025 st = ic->streams[i];
2026 if (codec_identified[st->index])
2029 //FIXME this is a mess
2030 if(i!=ic->nb_streams){
2031 av_read_frame_flush(ic);
2032 for(i=0;i<ic->nb_streams;i++) {
2033 st = ic->streams[i];
2034 if (codec_identified[st->index]) {
2035 av_seek_frame(ic, st->index, 0.0, 0);
2037 st->cur_dts= st->first_dts;
2039 url_fseek(ic->pb, ic->data_offset, SEEK_SET);
2043 /* correct DTS for B-frame streams with no timestamps */
2044 for(i=0;i<ic->nb_streams;i++) {
2045 st = ic->streams[i];
2046 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2048 ppktl = &ic->packet_buffer;
2050 if(ppkt1->stream_index != i)
2052 if(ppkt1->pkt->dts < 0)
2054 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2056 ppkt1->pkt->dts -= delta;
2061 st->cur_dts -= delta;
2067 av_free(duration_error);
2068 for(i=0;i<MAX_STREAMS;i++){
2069 av_freep(&(probe_data[i].buf));
2075 /*******************************************************/
2077 int av_read_play(AVFormatContext *s)
2079 if (s->iformat->read_play)
2080 return s->iformat->read_play(s);
2082 return av_url_read_fpause(s->pb, 0);
2083 return AVERROR(ENOSYS);
2086 int av_read_pause(AVFormatContext *s)
2088 if (s->iformat->read_pause)
2089 return s->iformat->read_pause(s);
2091 return av_url_read_fpause(s->pb, 1);
2092 return AVERROR(ENOSYS);
2095 void av_close_input_stream(AVFormatContext *s)
2100 /* free previous packet */
2101 if (s->cur_st && s->cur_st->parser)
2102 av_free_packet(&s->cur_pkt);
2104 if (s->iformat->read_close)
2105 s->iformat->read_close(s);
2106 for(i=0;i<s->nb_streams;i++) {
2107 /* free all data in a stream component */
2110 av_parser_close(st->parser);
2112 av_free(st->index_entries);
2113 av_free(st->codec->extradata);
2115 av_free(st->filename);
2118 for(i=s->nb_programs-1; i>=0; i--) {
2119 av_freep(&s->programs[i]->provider_name);
2120 av_freep(&s->programs[i]->name);
2121 av_freep(&s->programs[i]->stream_index);
2122 av_freep(&s->programs[i]);
2124 flush_packet_queue(s);
2125 av_freep(&s->priv_data);
2129 void av_close_input_file(AVFormatContext *s)
2131 ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2132 av_close_input_stream(s);
2137 AVStream *av_new_stream(AVFormatContext *s, int id)
2142 if (s->nb_streams >= MAX_STREAMS)
2145 st = av_mallocz(sizeof(AVStream));
2149 st->codec= avcodec_alloc_context();
2151 /* no default bitrate if decoding */
2152 st->codec->bit_rate = 0;
2154 st->index = s->nb_streams;
2156 st->start_time = AV_NOPTS_VALUE;
2157 st->duration = AV_NOPTS_VALUE;
2158 st->cur_dts = AV_NOPTS_VALUE;
2159 st->first_dts = AV_NOPTS_VALUE;
2161 /* default pts setting is MPEG-like */
2162 av_set_pts_info(st, 33, 1, 90000);
2163 st->last_IP_pts = AV_NOPTS_VALUE;
2164 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2165 st->pts_buffer[i]= AV_NOPTS_VALUE;
2167 s->streams[s->nb_streams++] = st;
2171 AVProgram *av_new_program(AVFormatContext *ac, int id)
2173 AVProgram *program=NULL;
2177 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2180 for(i=0; i<ac->nb_programs; i++)
2181 if(ac->programs[i]->id == id)
2182 program = ac->programs[i];
2185 program = av_mallocz(sizeof(AVProgram));
2188 dynarray_add(&ac->programs, &ac->nb_programs, program);
2189 program->discard = AVDISCARD_NONE;
2196 void av_set_program_name(AVProgram *program, char *provider_name, char *name)
2198 assert(!provider_name == !name);
2200 av_free(program->provider_name);
2201 av_free(program-> name);
2202 program->provider_name = av_strdup(provider_name);
2203 program-> name = av_strdup( name);
2208 /************************************************************/
2209 /* output media file */
2211 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2215 if (s->oformat->priv_data_size > 0) {
2216 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2218 return AVERROR(ENOMEM);
2220 s->priv_data = NULL;
2222 if (s->oformat->set_parameters) {
2223 ret = s->oformat->set_parameters(s, ap);
2230 int av_write_header(AVFormatContext *s)
2235 // some sanity checks
2236 for(i=0;i<s->nb_streams;i++) {
2239 switch (st->codec->codec_type) {
2240 case CODEC_TYPE_AUDIO:
2241 if(st->codec->sample_rate<=0){
2242 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2246 case CODEC_TYPE_VIDEO:
2247 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2248 av_log(s, AV_LOG_ERROR, "time base not set\n");
2251 if(st->codec->width<=0 || st->codec->height<=0){
2252 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2258 if(s->oformat->codec_tag){
2259 if(st->codec->codec_tag){
2261 //check that tag + id is in the table
2262 //if neither is in the table -> OK
2263 //if tag is in the table with another id -> FAIL
2264 //if id is in the table with another tag -> FAIL unless strict < ?
2266 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2270 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2271 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2273 return AVERROR(ENOMEM);
2276 if(s->oformat->write_header){
2277 ret = s->oformat->write_header(s);
2282 /* init PTS generation */
2283 for(i=0;i<s->nb_streams;i++) {
2284 int64_t den = AV_NOPTS_VALUE;
2287 switch (st->codec->codec_type) {
2288 case CODEC_TYPE_AUDIO:
2289 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2291 case CODEC_TYPE_VIDEO:
2292 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2297 if (den != AV_NOPTS_VALUE) {
2299 return AVERROR_INVALIDDATA;
2300 av_frac_init(&st->pts, 0, 0, den);
2306 //FIXME merge with compute_pkt_fields
2307 static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
2308 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2309 int num, den, frame_size, i;
2311 // 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);
2313 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2316 /* duration field */
2317 if (pkt->duration == 0) {
2318 compute_frame_duration(&num, &den, st, NULL, pkt);
2320 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
2324 //XXX/FIXME this is a temporary hack until all encoders output pts
2325 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2327 // pkt->pts= st->cur_dts;
2328 pkt->pts= st->pts.val;
2331 //calculate dts from pts
2332 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){
2333 st->pts_buffer[0]= pkt->pts;
2334 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2335 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
2336 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2337 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2339 pkt->dts= st->pts_buffer[0];
2342 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2343 av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
2346 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2347 av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n");
2351 // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2352 st->cur_dts= pkt->dts;
2353 st->pts.val= pkt->dts;
2356 switch (st->codec->codec_type) {
2357 case CODEC_TYPE_AUDIO:
2358 frame_size = get_audio_frame_size(st->codec, pkt->size);
2360 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2361 likely equal to the encoder delay, but it would be better if we
2362 had the real timestamps from the encoder */
2363 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2364 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2367 case CODEC_TYPE_VIDEO:
2368 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2376 static void truncate_ts(AVStream *st, AVPacket *pkt){
2377 int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
2380 // pkt->dts= 0; //this happens for low_delay=0 and B-frames, FIXME, needs further investigation about what we should do here
2382 if (pkt->pts != AV_NOPTS_VALUE)
2383 pkt->pts &= pts_mask;
2384 if (pkt->dts != AV_NOPTS_VALUE)
2385 pkt->dts &= pts_mask;
2388 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2392 ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
2393 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2396 truncate_ts(s->streams[pkt->stream_index], pkt);
2398 ret= s->oformat->write_packet(s, pkt);
2400 ret= url_ferror(s->pb);
2404 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2405 AVPacketList *pktl, **next_point, *this_pktl;
2407 int streams[MAX_STREAMS];
2410 AVStream *st= s->streams[ pkt->stream_index];
2412 // assert(pkt->destruct != av_destruct_packet); //FIXME
2414 this_pktl = av_mallocz(sizeof(AVPacketList));
2415 this_pktl->pkt= *pkt;
2416 if(pkt->destruct == av_destruct_packet)
2417 pkt->destruct= NULL; // not shared -> must keep original from being freed
2419 av_dup_packet(&this_pktl->pkt); //shared -> must dup
2421 next_point = &s->packet_buffer;
2423 AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
2424 int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
2425 int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
2426 if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
2428 next_point= &(*next_point)->next;
2430 this_pktl->next= *next_point;
2431 *next_point= this_pktl;
2434 memset(streams, 0, sizeof(streams));
2435 pktl= s->packet_buffer;
2437 //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
2438 if(streams[ pktl->pkt.stream_index ] == 0)
2440 streams[ pktl->pkt.stream_index ]++;
2444 if(s->nb_streams == stream_count || (flush && stream_count)){
2445 pktl= s->packet_buffer;
2448 s->packet_buffer= pktl->next;
2452 av_init_packet(out);
2458 * Interleaves an AVPacket correctly so it can be muxed.
2459 * @param out the interleaved packet will be output here
2460 * @param in the input packet
2461 * @param flush 1 if no further packets are available as input and all
2462 * remaining packets should be output
2463 * @return 1 if a packet was output, 0 if no packet could be output,
2464 * < 0 if an error occured
2466 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2467 if(s->oformat->interleave_packet)
2468 return s->oformat->interleave_packet(s, out, in, flush);
2470 return av_interleave_packet_per_dts(s, out, in, flush);
2473 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2474 AVStream *st= s->streams[ pkt->stream_index];
2476 //FIXME/XXX/HACK drop zero sized packets
2477 if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
2480 //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
2481 if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2484 if(pkt->dts == AV_NOPTS_VALUE)
2489 int ret= av_interleave_packet(s, &opkt, pkt, 0);
2490 if(ret<=0) //FIXME cleanup needed for ret<0 ?
2493 truncate_ts(s->streams[opkt.stream_index], &opkt);
2494 ret= s->oformat->write_packet(s, &opkt);
2496 av_free_packet(&opkt);
2501 if(url_ferror(s->pb))
2502 return url_ferror(s->pb);
2506 int av_write_trailer(AVFormatContext *s)
2512 ret= av_interleave_packet(s, &pkt, NULL, 1);
2513 if(ret<0) //FIXME cleanup needed for ret<0 ?
2518 truncate_ts(s->streams[pkt.stream_index], &pkt);
2519 ret= s->oformat->write_packet(s, &pkt);
2521 av_free_packet(&pkt);
2525 if(url_ferror(s->pb))
2529 if(s->oformat->write_trailer)
2530 ret = s->oformat->write_trailer(s);
2533 ret=url_ferror(s->pb);
2534 for(i=0;i<s->nb_streams;i++)
2535 av_freep(&s->streams[i]->priv_data);
2536 av_freep(&s->priv_data);
2540 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
2543 AVProgram *program=NULL;
2546 for(i=0; i<ac->nb_programs; i++){
2547 if(ac->programs[i]->id != progid)
2549 program = ac->programs[i];
2550 for(j=0; j<program->nb_stream_indexes; j++)
2551 if(program->stream_index[j] == idx)
2554 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
2557 program->stream_index = tmp;
2558 program->stream_index[program->nb_stream_indexes++] = idx;
2563 /* "user interface" functions */
2564 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
2567 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
2568 AVStream *st = ic->streams[i];
2569 int g = ff_gcd(st->time_base.num, st->time_base.den);
2570 avcodec_string(buf, sizeof(buf), st->codec, is_output);
2571 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
2572 /* the pid is an important information, so we display it */
2573 /* XXX: add a generic system */
2574 if (flags & AVFMT_SHOW_IDS)
2575 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
2576 if (strlen(st->language) > 0)
2577 av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
2578 av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
2579 av_log(NULL, AV_LOG_INFO, ": %s", buf);
2580 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2581 if(st->r_frame_rate.den && st->r_frame_rate.num)
2582 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(r)", av_q2d(st->r_frame_rate));
2583 /* else if(st->time_base.den && st->time_base.num)
2584 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(m)", 1/av_q2d(st->time_base));*/
2586 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(c)", 1/av_q2d(st->codec->time_base));
2588 av_log(NULL, AV_LOG_INFO, "\n");
2591 void dump_format(AVFormatContext *ic,
2598 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
2599 is_output ? "Output" : "Input",
2601 is_output ? ic->oformat->name : ic->iformat->name,
2602 is_output ? "to" : "from", url);
2604 av_log(NULL, AV_LOG_INFO, " Duration: ");
2605 if (ic->duration != AV_NOPTS_VALUE) {
2606 int hours, mins, secs, us;
2607 secs = ic->duration / AV_TIME_BASE;
2608 us = ic->duration % AV_TIME_BASE;
2613 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%01d", hours, mins, secs,
2614 (10 * us) / AV_TIME_BASE);
2616 av_log(NULL, AV_LOG_INFO, "N/A");
2618 if (ic->start_time != AV_NOPTS_VALUE) {
2620 av_log(NULL, AV_LOG_INFO, ", start: ");
2621 secs = ic->start_time / AV_TIME_BASE;
2622 us = ic->start_time % AV_TIME_BASE;
2623 av_log(NULL, AV_LOG_INFO, "%d.%06d",
2624 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
2626 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
2628 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
2630 av_log(NULL, AV_LOG_INFO, "N/A");
2632 av_log(NULL, AV_LOG_INFO, "\n");
2634 if(ic->nb_programs) {
2636 for(j=0; j<ic->nb_programs; j++) {
2637 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
2638 ic->programs[j]->name ? ic->programs[j]->name : "");
2639 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++)
2640 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
2643 for(i=0;i<ic->nb_streams;i++)
2644 dump_stream_format(ic, i, index, is_output);
2647 int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
2649 return av_parse_video_frame_size(width_ptr, height_ptr, str);
2652 int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg)
2654 AVRational frame_rate;
2655 int ret = av_parse_video_frame_rate(&frame_rate, arg);
2656 *frame_rate_num= frame_rate.num;
2657 *frame_rate_den= frame_rate.den;
2662 * Gets the current time in microseconds.
2664 int64_t av_gettime(void)
2667 gettimeofday(&tv,NULL);
2668 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
2671 int64_t parse_date(const char *datestr, int duration)
2677 static const char *date_fmt[] = {
2681 static const char *time_fmt[] = {
2691 time_t now = time(0);
2693 len = strlen(datestr);
2695 lastch = datestr[len - 1];
2698 is_utc = (lastch == 'z' || lastch == 'Z');
2700 memset(&dt, 0, sizeof(dt));
2705 /* parse the year-month-day part */
2706 for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) {
2707 q = small_strptime(p, date_fmt[i], &dt);
2713 /* if the year-month-day part is missing, then take the
2714 * current year-month-day time */
2719 dt = *localtime(&now);
2721 dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
2726 if (*p == 'T' || *p == 't' || *p == ' ')
2729 /* parse the hour-minute-second part */
2730 for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) {
2731 q = small_strptime(p, time_fmt[i], &dt);
2737 /* parse datestr as a duration */
2742 /* parse datestr as HH:MM:SS */
2743 q = small_strptime(p, time_fmt[0], &dt);
2745 /* parse datestr as S+ */
2746 dt.tm_sec = strtol(p, (char **)&q, 10);
2748 /* the parsing didn't succeed */
2755 /* Now we have all the fields that we can get */
2761 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
2763 dt.tm_isdst = -1; /* unknown */
2773 /* parse the .m... part */
2777 for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
2780 val += n * (*q - '0');
2784 return negative ? -t : t;
2787 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
2797 while (*p != '\0' && *p != '=' && *p != '&') {
2798 if ((q - tag) < sizeof(tag) - 1)
2806 while (*p != '&' && *p != '\0') {
2807 if ((q - arg) < arg_size - 1) {
2817 if (!strcmp(tag, tag1))
2826 int av_get_frame_filename(char *buf, int buf_size,
2827 const char *path, int number)
2830 char *q, buf1[20], c;
2831 int nd, len, percentd_found;
2843 while (isdigit(*p)) {
2844 nd = nd * 10 + *p++ - '0';
2847 } while (isdigit(c));
2856 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
2858 if ((q - buf + len) > buf_size - 1)
2860 memcpy(q, buf1, len);
2868 if ((q - buf) < buf_size - 1)
2872 if (!percentd_found)
2881 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
2884 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
2886 for(i=0;i<size;i+=16) {
2893 PRINT(" %02x", buf[i+j]);
2898 for(j=0;j<len;j++) {
2900 if (c < ' ' || c > '~')
2909 void av_hex_dump(FILE *f, uint8_t *buf, int size)
2911 hex_dump_internal(NULL, f, 0, buf, size);
2914 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
2916 hex_dump_internal(avcl, NULL, level, buf, size);
2919 //FIXME needs to know the time_base
2920 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload)
2922 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
2923 PRINT("stream #%d:\n", pkt->stream_index);
2924 PRINT(" keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
2925 PRINT(" duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
2926 /* DTS is _always_ valid after av_read_frame() */
2928 if (pkt->dts == AV_NOPTS_VALUE)
2931 PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE);
2932 /* PTS may not be known if B-frames are present. */
2934 if (pkt->pts == AV_NOPTS_VALUE)
2937 PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE);
2939 PRINT(" size=%d\n", pkt->size);
2942 av_hex_dump(f, pkt->data, pkt->size);
2945 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
2947 pkt_dump_internal(NULL, f, 0, pkt, dump_payload);
2950 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
2952 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload);
2955 void url_split(char *proto, int proto_size,
2956 char *authorization, int authorization_size,
2957 char *hostname, int hostname_size,
2959 char *path, int path_size,
2962 const char *p, *ls, *at, *col, *brk;
2964 if (port_ptr) *port_ptr = -1;
2965 if (proto_size > 0) proto[0] = 0;
2966 if (authorization_size > 0) authorization[0] = 0;
2967 if (hostname_size > 0) hostname[0] = 0;
2968 if (path_size > 0) path[0] = 0;
2970 /* parse protocol */
2971 if ((p = strchr(url, ':'))) {
2972 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
2977 /* no protocol means plain filename */
2978 av_strlcpy(path, url, path_size);
2982 /* separate path from hostname */
2983 ls = strchr(p, '/');
2985 ls = strchr(p, '?');
2987 av_strlcpy(path, ls, path_size);
2989 ls = &p[strlen(p)]; // XXX
2991 /* the rest is hostname, use that to parse auth/port */
2993 /* authorization (user[:pass]@hostname) */
2994 if ((at = strchr(p, '@')) && at < ls) {
2995 av_strlcpy(authorization, p,
2996 FFMIN(authorization_size, at + 1 - p));
2997 p = at + 1; /* skip '@' */
3000 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3002 av_strlcpy(hostname, p + 1,
3003 FFMIN(hostname_size, brk - p));
3004 if (brk[1] == ':' && port_ptr)
3005 *port_ptr = atoi(brk + 2);
3006 } else if ((col = strchr(p, ':')) && col < ls) {
3007 av_strlcpy(hostname, p,
3008 FFMIN(col + 1 - p, hostname_size));
3009 if (port_ptr) *port_ptr = atoi(col + 1);
3011 av_strlcpy(hostname, p,
3012 FFMIN(ls + 1 - p, hostname_size));
3016 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3017 int pts_num, int pts_den)
3019 s->pts_wrap_bits = pts_wrap_bits;
3020 s->time_base.num = pts_num;
3021 s->time_base.den = pts_den;
3024 /* fraction handling */
3027 * f = val + (num / den) + 0.5.
3029 * 'num' is normalized so that it is such as 0 <= num < den.
3031 * @param f fractional number
3032 * @param val integer value
3033 * @param num must be >= 0
3034 * @param den must be >= 1
3036 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
3049 * Fractional addition to f: f = f + (incr / f->den).
3051 * @param f fractional number
3052 * @param incr increment, can be positive or negative
3054 static void av_frac_add(AVFrac *f, int64_t incr)
3058 num = f->num + incr;
3061 f->val += num / den;
3067 } else if (num >= den) {
3068 f->val += num / den;