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, 1<<20, 0, INT_MAX, D},
327 {"rtbufsize", "max memory used for buffering real-time frames", OFFSET(max_picture_buffer), FF_OPT_TYPE_INT, 3041280, 0, INT_MAX, D}, /* defaults to 1s of 15fps 352x288 YUYV422 video */
335 static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
337 static void avformat_get_context_defaults(AVFormatContext *s)
339 memset(s, 0, sizeof(AVFormatContext));
341 s->av_class = &av_format_context_class;
343 av_opt_set_defaults(s);
346 AVFormatContext *av_alloc_format_context(void)
349 ic = av_malloc(sizeof(AVFormatContext));
351 avformat_get_context_defaults(ic);
352 ic->av_class = &av_format_context_class;
356 int av_open_input_stream(AVFormatContext **ic_ptr,
357 ByteIOContext *pb, const char *filename,
358 AVInputFormat *fmt, AVFormatParameters *ap)
362 AVFormatParameters default_ap;
366 memset(ap, 0, sizeof(default_ap));
369 if(!ap->prealloced_context)
370 ic = av_alloc_format_context();
374 err = AVERROR(ENOMEM);
379 ic->duration = AV_NOPTS_VALUE;
380 ic->start_time = AV_NOPTS_VALUE;
381 av_strlcpy(ic->filename, filename, sizeof(ic->filename));
383 /* allocate private data */
384 if (fmt->priv_data_size > 0) {
385 ic->priv_data = av_mallocz(fmt->priv_data_size);
386 if (!ic->priv_data) {
387 err = AVERROR(ENOMEM);
391 ic->priv_data = NULL;
394 err = ic->iformat->read_header(ic, ap);
398 if (pb && !ic->data_offset)
399 ic->data_offset = url_ftell(ic->pb);
405 av_freep(&ic->priv_data);
412 /** size of probe buffer, for guessing file type from file contents */
413 #define PROBE_BUF_MIN 2048
414 #define PROBE_BUF_MAX (1<<20)
416 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
419 AVFormatParameters *ap)
422 AVProbeData probe_data, *pd = &probe_data;
423 ByteIOContext *pb = NULL;
427 pd->filename = filename;
432 /* guess format if no file can be opened */
433 fmt = av_probe_input_format(pd, 0);
436 /* Do not open file if the format does not need it. XXX: specific
437 hack needed to handle RTSP/TCP */
438 if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
439 /* if no file needed do not try to open one */
440 if ((err=url_fopen(&pb, filename, URL_RDONLY)) < 0) {
444 url_setbufsize(pb, buf_size);
447 for(probe_size= PROBE_BUF_MIN; probe_size<=PROBE_BUF_MAX && !fmt; probe_size<<=1){
448 int score= probe_size < PROBE_BUF_MAX ? AVPROBE_SCORE_MAX/4 : 0;
449 /* read probe data */
450 pd->buf= av_realloc(pd->buf, probe_size + AVPROBE_PADDING_SIZE);
451 pd->buf_size = get_buffer(pb, pd->buf, probe_size);
452 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
453 if (url_fseek(pb, 0, SEEK_SET) < 0) {
455 if (url_fopen(&pb, filename, URL_RDONLY) < 0) {
461 /* guess file format */
462 fmt = av_probe_input_format2(pd, 1, &score);
467 /* if still no format found, error */
473 /* check filename in case an image number is expected */
474 if (fmt->flags & AVFMT_NEEDNUMBER) {
475 if (!av_filename_number_test(filename)) {
476 err = AVERROR_NUMEXPECTED;
480 err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
493 /*******************************************************/
495 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
500 ret= s->iformat->read_packet(s, pkt);
503 st= s->streams[pkt->stream_index];
505 switch(st->codec->codec_type){
506 case CODEC_TYPE_VIDEO:
507 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
509 case CODEC_TYPE_AUDIO:
510 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
512 case CODEC_TYPE_SUBTITLE:
513 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
520 /**********************************************************/
523 * Get the number of samples of an audio frame. Return -1 on error.
525 static int get_audio_frame_size(AVCodecContext *enc, int size)
529 if (enc->frame_size <= 1) {
530 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
532 if (bits_per_sample) {
533 if (enc->channels == 0)
535 frame_size = (size << 3) / (bits_per_sample * enc->channels);
537 /* used for example by ADPCM codecs */
538 if (enc->bit_rate == 0)
540 frame_size = (size * 8 * enc->sample_rate) / enc->bit_rate;
543 frame_size = enc->frame_size;
550 * Return the frame duration in seconds. Return 0 if not available.
552 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
553 AVCodecParserContext *pc, AVPacket *pkt)
559 switch(st->codec->codec_type) {
560 case CODEC_TYPE_VIDEO:
561 if(st->time_base.num*1000LL > st->time_base.den){
562 *pnum = st->time_base.num;
563 *pden = st->time_base.den;
564 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
565 *pnum = st->codec->time_base.num;
566 *pden = st->codec->time_base.den;
567 if (pc && pc->repeat_pict) {
569 *pnum = (*pnum) * (2 + pc->repeat_pict);
573 case CODEC_TYPE_AUDIO:
574 frame_size = get_audio_frame_size(st->codec, pkt->size);
578 *pden = st->codec->sample_rate;
585 static int is_intra_only(AVCodecContext *enc){
586 if(enc->codec_type == CODEC_TYPE_AUDIO){
588 }else if(enc->codec_type == CODEC_TYPE_VIDEO){
589 switch(enc->codec_id){
591 case CODEC_ID_MJPEGB:
593 case CODEC_ID_RAWVIDEO:
594 case CODEC_ID_DVVIDEO:
595 case CODEC_ID_HUFFYUV:
596 case CODEC_ID_FFVHUFF:
607 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
608 int64_t dts, int64_t pts)
610 AVStream *st= s->streams[stream_index];
611 AVPacketList *pktl= s->packet_buffer;
613 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE)
616 st->first_dts= dts - st->cur_dts;
619 for(; pktl; pktl= pktl->next){
620 if(pktl->pkt.stream_index != stream_index)
622 //FIXME think more about this check
623 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
624 pktl->pkt.pts += st->first_dts;
626 if(pktl->pkt.dts != AV_NOPTS_VALUE)
627 pktl->pkt.dts += st->first_dts;
629 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
630 st->start_time= pktl->pkt.pts;
632 if (st->start_time == AV_NOPTS_VALUE)
633 st->start_time = pts;
636 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
638 AVPacketList *pktl= s->packet_buffer;
640 assert(pkt->duration && !st->cur_dts);
642 for(; pktl; pktl= pktl->next){
643 if(pktl->pkt.stream_index != pkt->stream_index)
645 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
646 && !pktl->pkt.duration){
647 pktl->pkt.pts= pktl->pkt.dts= st->cur_dts;
648 st->cur_dts += pkt->duration;
649 pktl->pkt.duration= pkt->duration;
655 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
656 AVCodecParserContext *pc, AVPacket *pkt)
658 int num, den, presentation_delayed, delay, i;
661 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
662 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
663 pkt->dts -= 1LL<<st->pts_wrap_bits;
666 if (pkt->duration == 0) {
667 compute_frame_duration(&num, &den, st, pc, pkt);
669 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
672 update_initial_durations(s, st, pkt);
676 /* correct timestamps with byte offset if demuxers only have timestamps
677 on packet boundaries */
678 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
679 /* this will estimate bitrate based on this frame's duration and size */
680 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
681 if(pkt->pts != AV_NOPTS_VALUE)
683 if(pkt->dts != AV_NOPTS_VALUE)
687 /* do we have a video B-frame ? */
688 delay= st->codec->has_b_frames;
689 presentation_delayed = 0;
690 /* XXX: need has_b_frame, but cannot get it if the codec is
693 pc && pc->pict_type != FF_B_TYPE)
694 presentation_delayed = 1;
695 /* This may be redundant, but it should not hurt. */
696 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
697 presentation_delayed = 1;
699 if(st->cur_dts == AV_NOPTS_VALUE){
700 st->cur_dts = 0; //FIXME maybe set it to 0 during init
703 // 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);
704 /* interpolate PTS and DTS if they are not present */
706 if (presentation_delayed) {
707 /* DTS = decompression timestamp */
708 /* PTS = presentation timestamp */
709 if (pkt->dts == AV_NOPTS_VALUE)
710 pkt->dts = st->last_IP_pts;
711 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
712 if (pkt->dts == AV_NOPTS_VALUE)
713 pkt->dts = st->cur_dts;
715 /* this is tricky: the dts must be incremented by the duration
716 of the frame we are displaying, i.e. the last I- or P-frame */
717 if (st->last_IP_duration == 0)
718 st->last_IP_duration = pkt->duration;
719 st->cur_dts = pkt->dts + st->last_IP_duration;
720 st->last_IP_duration = pkt->duration;
721 st->last_IP_pts= pkt->pts;
722 /* cannot compute PTS if not present (we can compute it only
723 by knowing the future */
724 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
725 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
726 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
727 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
728 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
729 pkt->pts += pkt->duration;
730 // 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);
734 /* presentation is not delayed : PTS and DTS are the same */
735 if(pkt->pts == AV_NOPTS_VALUE)
737 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
738 if(pkt->pts == AV_NOPTS_VALUE)
739 pkt->pts = st->cur_dts;
741 st->cur_dts = pkt->pts + pkt->duration;
745 if(pkt->pts != AV_NOPTS_VALUE){
746 st->pts_buffer[0]= pkt->pts;
747 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
748 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
749 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
750 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
751 if(pkt->dts == AV_NOPTS_VALUE)
752 pkt->dts= st->pts_buffer[0];
754 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
756 if(pkt->dts > st->cur_dts)
757 st->cur_dts = pkt->dts;
760 // 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);
763 if(is_intra_only(st->codec))
764 pkt->flags |= PKT_FLAG_KEY;
767 /* keyframe computation */
768 if (pc->pict_type == FF_I_TYPE)
769 pkt->flags |= PKT_FLAG_KEY;
773 void av_destruct_packet_nofree(AVPacket *pkt)
775 pkt->data = NULL; pkt->size = 0;
778 static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
786 /* select current input stream component */
789 if (!st->need_parsing || !st->parser) {
790 /* no parsing needed: we just output the packet as is */
791 /* raw data support */
793 compute_pkt_fields(s, st, NULL, pkt);
796 } else if (s->cur_len > 0 && st->discard < AVDISCARD_ALL) {
797 len = av_parser_parse(st->parser, st->codec, &pkt->data, &pkt->size,
798 s->cur_ptr, s->cur_len,
799 s->cur_pkt.pts, s->cur_pkt.dts);
800 s->cur_pkt.pts = AV_NOPTS_VALUE;
801 s->cur_pkt.dts = AV_NOPTS_VALUE;
802 /* increment read pointer */
806 /* return packet if any */
809 pkt->pos = s->cur_pkt.pos; // Isn't quite accurate but close.
811 pkt->stream_index = st->index;
812 pkt->pts = st->parser->pts;
813 pkt->dts = st->parser->dts;
814 pkt->destruct = av_destruct_packet_nofree;
815 compute_pkt_fields(s, st, st->parser, pkt);
817 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & PKT_FLAG_KEY){
818 ff_reduce_index(s, st->index);
819 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
820 0, 0, AVINDEX_KEYFRAME);
827 av_free_packet(&s->cur_pkt);
831 /* read next packet */
832 ret = av_read_packet(s, &s->cur_pkt);
834 if (ret == AVERROR(EAGAIN))
836 /* return the last frames, if any */
837 for(i = 0; i < s->nb_streams; i++) {
839 if (st->parser && st->need_parsing) {
840 av_parser_parse(st->parser, st->codec,
841 &pkt->data, &pkt->size,
843 AV_NOPTS_VALUE, AV_NOPTS_VALUE);
848 /* no more packets: really terminate parsing */
852 st = s->streams[s->cur_pkt.stream_index];
853 if(st->codec->debug & FF_DEBUG_PTS)
854 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
855 s->cur_pkt.stream_index,
861 s->cur_ptr = s->cur_pkt.data;
862 s->cur_len = s->cur_pkt.size;
863 if (st->need_parsing && !st->parser) {
864 st->parser = av_parser_init(st->codec->codec_id);
866 /* no parser available: just output the raw packets */
867 st->need_parsing = AVSTREAM_PARSE_NONE;
868 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
869 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
871 if(st->parser && (s->iformat->flags & AVFMT_GENERIC_INDEX)){
872 st->parser->last_frame_offset=
873 st->parser->cur_offset= s->cur_pkt.pos;
878 if(st->codec->debug & FF_DEBUG_PTS)
879 av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
888 static AVPacket *add_to_pktbuf(AVFormatContext *s, AVPacket *pkt){
889 AVPacketList *pktl= s->packet_buffer;
890 AVPacketList **plast_pktl= &s->packet_buffer;
892 while(*plast_pktl) plast_pktl= &(*plast_pktl)->next; //FIXME maybe maintain pointer to the last?
894 pktl = av_mallocz(sizeof(AVPacketList));
898 /* add the packet in the buffered packet list */
904 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
908 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
911 pktl = s->packet_buffer;
913 AVPacket *next_pkt= &pktl->pkt;
915 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
916 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
917 if( pktl->pkt.stream_index == next_pkt->stream_index
918 && next_pkt->dts < pktl->pkt.dts
919 && pktl->pkt.pts != pktl->pkt.dts //not b frame
920 /*&& pktl->pkt.dts != AV_NOPTS_VALUE*/){
921 next_pkt->pts= pktl->pkt.dts;
925 pktl = s->packet_buffer;
928 if( next_pkt->pts != AV_NOPTS_VALUE
929 || next_pkt->dts == AV_NOPTS_VALUE
931 /* read packet from packet buffer, if there is data */
933 s->packet_buffer = pktl->next;
939 int ret= av_read_frame_internal(s, pkt);
941 if(pktl && ret != AVERROR(EAGAIN)){
948 if(av_dup_packet(add_to_pktbuf(s, pkt)) < 0)
949 return AVERROR(ENOMEM);
951 assert(!s->packet_buffer);
952 return av_read_frame_internal(s, pkt);
957 /* XXX: suppress the packet queue */
958 static void flush_packet_queue(AVFormatContext *s)
963 pktl = s->packet_buffer;
966 s->packet_buffer = pktl->next;
967 av_free_packet(&pktl->pkt);
972 /*******************************************************/
975 int av_find_default_stream_index(AVFormatContext *s)
980 if (s->nb_streams <= 0)
982 for(i = 0; i < s->nb_streams; i++) {
984 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
992 * Flush the frame reader.
994 static void av_read_frame_flush(AVFormatContext *s)
999 flush_packet_queue(s);
1001 /* free previous packet */
1003 if (s->cur_st->parser)
1004 av_free_packet(&s->cur_pkt);
1011 /* for each stream, reset read state */
1012 for(i = 0; i < s->nb_streams; i++) {
1016 av_parser_close(st->parser);
1019 st->last_IP_pts = AV_NOPTS_VALUE;
1020 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1024 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1027 for(i = 0; i < s->nb_streams; i++) {
1028 AVStream *st = s->streams[i];
1030 st->cur_dts = av_rescale(timestamp,
1031 st->time_base.den * (int64_t)ref_st->time_base.num,
1032 st->time_base.num * (int64_t)ref_st->time_base.den);
1036 void ff_reduce_index(AVFormatContext *s, int stream_index)
1038 AVStream *st= s->streams[stream_index];
1039 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1041 if((unsigned)st->nb_index_entries >= max_entries){
1043 for(i=0; 2*i<st->nb_index_entries; i++)
1044 st->index_entries[i]= st->index_entries[2*i];
1045 st->nb_index_entries= i;
1049 int av_add_index_entry(AVStream *st,
1050 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1052 AVIndexEntry *entries, *ie;
1055 if((unsigned)st->nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1058 entries = av_fast_realloc(st->index_entries,
1059 &st->index_entries_allocated_size,
1060 (st->nb_index_entries + 1) *
1061 sizeof(AVIndexEntry));
1065 st->index_entries= entries;
1067 index= av_index_search_timestamp(st, timestamp, AVSEEK_FLAG_ANY);
1070 index= st->nb_index_entries++;
1071 ie= &entries[index];
1072 assert(index==0 || ie[-1].timestamp < timestamp);
1074 ie= &entries[index];
1075 if(ie->timestamp != timestamp){
1076 if(ie->timestamp <= timestamp)
1078 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(st->nb_index_entries - index));
1079 st->nb_index_entries++;
1080 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1081 distance= ie->min_distance;
1085 ie->timestamp = timestamp;
1086 ie->min_distance= distance;
1093 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1096 AVIndexEntry *entries= st->index_entries;
1097 int nb_entries= st->nb_index_entries;
1106 timestamp = entries[m].timestamp;
1107 if(timestamp >= wanted_timestamp)
1109 if(timestamp <= wanted_timestamp)
1112 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1114 if(!(flags & AVSEEK_FLAG_ANY)){
1115 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1116 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1127 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1128 AVInputFormat *avif= s->iformat;
1129 int64_t pos_min, pos_max, pos, pos_limit;
1130 int64_t ts_min, ts_max, ts;
1134 if (stream_index < 0)
1138 av_log(s, AV_LOG_DEBUG, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1142 ts_min= AV_NOPTS_VALUE;
1143 pos_limit= -1; //gcc falsely says it may be uninitialized
1145 st= s->streams[stream_index];
1146 if(st->index_entries){
1149 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()
1150 index= FFMAX(index, 0);
1151 e= &st->index_entries[index];
1153 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1155 ts_min= e->timestamp;
1157 av_log(s, AV_LOG_DEBUG, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1164 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1165 assert(index < st->nb_index_entries);
1167 e= &st->index_entries[index];
1168 assert(e->timestamp >= target_ts);
1170 ts_max= e->timestamp;
1171 pos_limit= pos_max - e->min_distance;
1173 av_log(s, AV_LOG_DEBUG, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1174 pos_max,pos_limit, ts_max);
1179 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1184 url_fseek(s->pb, pos, SEEK_SET);
1186 av_update_cur_dts(s, st, ts);
1191 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 )){
1193 int64_t start_pos, filesize;
1197 av_log(s, AV_LOG_DEBUG, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1200 if(ts_min == AV_NOPTS_VALUE){
1201 pos_min = s->data_offset;
1202 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1203 if (ts_min == AV_NOPTS_VALUE)
1207 if(ts_max == AV_NOPTS_VALUE){
1209 filesize = url_fsize(s->pb);
1210 pos_max = filesize - 1;
1213 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1215 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1216 if (ts_max == AV_NOPTS_VALUE)
1220 int64_t tmp_pos= pos_max + 1;
1221 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1222 if(tmp_ts == AV_NOPTS_VALUE)
1226 if(tmp_pos >= filesize)
1232 if(ts_min > ts_max){
1234 }else if(ts_min == ts_max){
1239 while (pos_min < pos_limit) {
1241 av_log(s, AV_LOG_DEBUG, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1245 assert(pos_limit <= pos_max);
1248 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1249 // interpolate position (better than dichotomy)
1250 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1251 + pos_min - approximate_keyframe_distance;
1252 }else if(no_change==1){
1253 // bisection, if interpolation failed to change min or max pos last time
1254 pos = (pos_min + pos_limit)>>1;
1256 /* linear search if bisection failed, can only happen if there
1257 are very few or no keyframes between min/max */
1262 else if(pos > pos_limit)
1266 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1272 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);
1274 if(ts == AV_NOPTS_VALUE){
1275 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1278 assert(ts != AV_NOPTS_VALUE);
1279 if (target_ts <= ts) {
1280 pos_limit = start_pos - 1;
1284 if (target_ts >= ts) {
1290 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1291 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1294 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1296 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1297 av_log(s, AV_LOG_DEBUG, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1298 pos, ts_min, target_ts, ts_max);
1304 static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1305 int64_t pos_min, pos_max;
1309 if (stream_index < 0)
1312 st= s->streams[stream_index];
1315 pos_min = s->data_offset;
1316 pos_max = url_fsize(s->pb) - 1;
1318 if (pos < pos_min) pos= pos_min;
1319 else if(pos > pos_max) pos= pos_max;
1321 url_fseek(s->pb, pos, SEEK_SET);
1324 av_update_cur_dts(s, st, ts);
1329 static int av_seek_frame_generic(AVFormatContext *s,
1330 int stream_index, int64_t timestamp, int flags)
1336 st = s->streams[stream_index];
1338 index = av_index_search_timestamp(st, timestamp, flags);
1340 if(index < 0 || index==st->nb_index_entries-1){
1344 if(st->index_entries && st->nb_index_entries){
1345 ie= &st->index_entries[st->nb_index_entries-1];
1346 url_fseek(s->pb, ie->pos, SEEK_SET);
1347 av_update_cur_dts(s, st, ie->timestamp);
1349 url_fseek(s->pb, 0, SEEK_SET);
1352 int ret = av_read_frame(s, &pkt);
1355 av_free_packet(&pkt);
1356 if(stream_index == pkt.stream_index){
1357 if((pkt.flags & PKT_FLAG_KEY) && pkt.dts > timestamp)
1361 index = av_index_search_timestamp(st, timestamp, flags);
1366 av_read_frame_flush(s);
1367 if (s->iformat->read_seek){
1368 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1371 ie = &st->index_entries[index];
1372 url_fseek(s->pb, ie->pos, SEEK_SET);
1374 av_update_cur_dts(s, st, ie->timestamp);
1379 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1384 av_read_frame_flush(s);
1386 if(flags & AVSEEK_FLAG_BYTE)
1387 return av_seek_frame_byte(s, stream_index, timestamp, flags);
1389 if(stream_index < 0){
1390 stream_index= av_find_default_stream_index(s);
1391 if(stream_index < 0)
1394 st= s->streams[stream_index];
1395 /* timestamp for default must be expressed in AV_TIME_BASE units */
1396 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1398 st= s->streams[stream_index];
1400 /* first, we try the format specific seek */
1401 if (s->iformat->read_seek)
1402 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1409 if(s->iformat->read_timestamp)
1410 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1412 return av_seek_frame_generic(s, stream_index, timestamp, flags);
1415 /*******************************************************/
1418 * Returns TRUE if the stream has accurate duration in any stream.
1420 * @return TRUE if the stream has accurate duration for at least one component.
1422 static int av_has_duration(AVFormatContext *ic)
1427 for(i = 0;i < ic->nb_streams; i++) {
1428 st = ic->streams[i];
1429 if (st->duration != AV_NOPTS_VALUE)
1436 * Estimate the stream timings from the one of each components.
1438 * Also computes the global bitrate if possible.
1440 static void av_update_stream_timings(AVFormatContext *ic)
1442 int64_t start_time, start_time1, end_time, end_time1;
1443 int64_t duration, duration1;
1447 start_time = INT64_MAX;
1448 end_time = INT64_MIN;
1449 duration = INT64_MIN;
1450 for(i = 0;i < ic->nb_streams; i++) {
1451 st = ic->streams[i];
1452 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1453 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1454 if (start_time1 < start_time)
1455 start_time = start_time1;
1456 if (st->duration != AV_NOPTS_VALUE) {
1457 end_time1 = start_time1
1458 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1459 if (end_time1 > end_time)
1460 end_time = end_time1;
1463 if (st->duration != AV_NOPTS_VALUE) {
1464 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1465 if (duration1 > duration)
1466 duration = duration1;
1469 if (start_time != INT64_MAX) {
1470 ic->start_time = start_time;
1471 if (end_time != INT64_MIN) {
1472 if (end_time - start_time > duration)
1473 duration = end_time - start_time;
1476 if (duration != INT64_MIN) {
1477 ic->duration = duration;
1478 if (ic->file_size > 0) {
1479 /* compute the bitrate */
1480 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1481 (double)ic->duration;
1486 static void fill_all_stream_timings(AVFormatContext *ic)
1491 av_update_stream_timings(ic);
1492 for(i = 0;i < ic->nb_streams; i++) {
1493 st = ic->streams[i];
1494 if (st->start_time == AV_NOPTS_VALUE) {
1495 if(ic->start_time != AV_NOPTS_VALUE)
1496 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1497 if(ic->duration != AV_NOPTS_VALUE)
1498 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1503 static void av_estimate_timings_from_bit_rate(AVFormatContext *ic)
1505 int64_t filesize, duration;
1509 /* if bit_rate is already set, we believe it */
1510 if (ic->bit_rate == 0) {
1512 for(i=0;i<ic->nb_streams;i++) {
1513 st = ic->streams[i];
1514 bit_rate += st->codec->bit_rate;
1516 ic->bit_rate = bit_rate;
1519 /* if duration is already set, we believe it */
1520 if (ic->duration == AV_NOPTS_VALUE &&
1521 ic->bit_rate != 0 &&
1522 ic->file_size != 0) {
1523 filesize = ic->file_size;
1525 for(i = 0; i < ic->nb_streams; i++) {
1526 st = ic->streams[i];
1527 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1528 if (st->duration == AV_NOPTS_VALUE)
1529 st->duration = duration;
1535 #define DURATION_MAX_READ_SIZE 250000
1537 /* only usable for MPEG-PS streams */
1538 static void av_estimate_timings_from_pts(AVFormatContext *ic, offset_t old_offset)
1540 AVPacket pkt1, *pkt = &pkt1;
1542 int read_size, i, ret;
1544 int64_t filesize, offset, duration;
1546 /* free previous packet */
1547 if (ic->cur_st && ic->cur_st->parser)
1548 av_free_packet(&ic->cur_pkt);
1551 /* flush packet queue */
1552 flush_packet_queue(ic);
1554 for(i=0;i<ic->nb_streams;i++) {
1555 st = ic->streams[i];
1557 av_parser_close(st->parser);
1562 /* we read the first packets to get the first PTS (not fully
1563 accurate, but it is enough now) */
1564 url_fseek(ic->pb, 0, SEEK_SET);
1567 if (read_size >= DURATION_MAX_READ_SIZE)
1569 /* if all info is available, we can stop */
1570 for(i = 0;i < ic->nb_streams; i++) {
1571 st = ic->streams[i];
1572 if (st->start_time == AV_NOPTS_VALUE)
1575 if (i == ic->nb_streams)
1578 ret = av_read_packet(ic, pkt);
1581 read_size += pkt->size;
1582 st = ic->streams[pkt->stream_index];
1583 if (pkt->pts != AV_NOPTS_VALUE) {
1584 if (st->start_time == AV_NOPTS_VALUE)
1585 st->start_time = pkt->pts;
1587 av_free_packet(pkt);
1590 /* estimate the end time (duration) */
1591 /* XXX: may need to support wrapping */
1592 filesize = ic->file_size;
1593 offset = filesize - DURATION_MAX_READ_SIZE;
1597 url_fseek(ic->pb, offset, SEEK_SET);
1600 if (read_size >= DURATION_MAX_READ_SIZE)
1603 ret = av_read_packet(ic, pkt);
1606 read_size += pkt->size;
1607 st = ic->streams[pkt->stream_index];
1608 if (pkt->pts != AV_NOPTS_VALUE &&
1609 st->start_time != AV_NOPTS_VALUE) {
1610 end_time = pkt->pts;
1611 duration = end_time - st->start_time;
1613 if (st->duration == AV_NOPTS_VALUE ||
1614 st->duration < duration)
1615 st->duration = duration;
1618 av_free_packet(pkt);
1621 fill_all_stream_timings(ic);
1623 url_fseek(ic->pb, old_offset, SEEK_SET);
1624 for(i=0; i<ic->nb_streams; i++){
1626 st->cur_dts= st->first_dts;
1627 st->last_IP_pts = AV_NOPTS_VALUE;
1631 static void av_estimate_timings(AVFormatContext *ic, offset_t old_offset)
1635 /* get the file size, if possible */
1636 if (ic->iformat->flags & AVFMT_NOFILE) {
1639 file_size = url_fsize(ic->pb);
1643 ic->file_size = file_size;
1645 if ((!strcmp(ic->iformat->name, "mpeg") ||
1646 !strcmp(ic->iformat->name, "mpegts")) &&
1647 file_size && !url_is_streamed(ic->pb)) {
1648 /* get accurate estimate from the PTSes */
1649 av_estimate_timings_from_pts(ic, old_offset);
1650 } else if (av_has_duration(ic)) {
1651 /* at least one component has timings - we use them for all
1653 fill_all_stream_timings(ic);
1655 /* less precise: use bitrate info */
1656 av_estimate_timings_from_bit_rate(ic);
1658 av_update_stream_timings(ic);
1664 for(i = 0;i < ic->nb_streams; i++) {
1665 st = ic->streams[i];
1666 printf("%d: start_time: %0.3f duration: %0.3f\n",
1667 i, (double)st->start_time / AV_TIME_BASE,
1668 (double)st->duration / AV_TIME_BASE);
1670 printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
1671 (double)ic->start_time / AV_TIME_BASE,
1672 (double)ic->duration / AV_TIME_BASE,
1673 ic->bit_rate / 1000);
1678 static int has_codec_parameters(AVCodecContext *enc)
1681 switch(enc->codec_type) {
1682 case CODEC_TYPE_AUDIO:
1683 val = enc->sample_rate;
1685 case CODEC_TYPE_VIDEO:
1686 val = enc->width && enc->pix_fmt != PIX_FMT_NONE;
1692 return (enc->codec_id != CODEC_ID_NONE && val != 0);
1695 static int try_decode_frame(AVStream *st, const uint8_t *data, int size)
1699 int got_picture, data_size, ret=0;
1702 if(!st->codec->codec){
1703 codec = avcodec_find_decoder(st->codec->codec_id);
1706 ret = avcodec_open(st->codec, codec);
1711 if(!has_codec_parameters(st->codec)){
1712 switch(st->codec->codec_type) {
1713 case CODEC_TYPE_VIDEO:
1714 ret = avcodec_decode_video(st->codec, &picture,
1715 &got_picture, data, size);
1717 case CODEC_TYPE_AUDIO:
1718 data_size = FFMAX(size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
1719 samples = av_malloc(data_size);
1722 ret = avcodec_decode_audio2(st->codec, samples,
1723 &data_size, data, size);
1734 static int set_codec_from_probe_data(AVStream *st, AVProbeData *pd, int score)
1737 fmt = av_probe_input_format2(pd, 1, &score);
1740 if (strncmp(fmt->name, "mp3", 3) == 0)
1741 st->codec->codec_id = CODEC_ID_MP3;
1742 else if (strncmp(fmt->name, "ac3", 3) == 0)
1743 st->codec->codec_id = CODEC_ID_AC3;
1748 unsigned int codec_get_tag(const AVCodecTag *tags, int id)
1750 while (tags->id != CODEC_ID_NONE) {
1758 enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag)
1761 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
1762 if(tag == tags[i].tag)
1765 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
1766 if( toupper((tag >> 0)&0xFF) == toupper((tags[i].tag >> 0)&0xFF)
1767 && toupper((tag >> 8)&0xFF) == toupper((tags[i].tag >> 8)&0xFF)
1768 && toupper((tag >>16)&0xFF) == toupper((tags[i].tag >>16)&0xFF)
1769 && toupper((tag >>24)&0xFF) == toupper((tags[i].tag >>24)&0xFF))
1772 return CODEC_ID_NONE;
1775 unsigned int av_codec_get_tag(const AVCodecTag *tags[4], enum CodecID id)
1778 for(i=0; tags && tags[i]; i++){
1779 int tag= codec_get_tag(tags[i], id);
1785 enum CodecID av_codec_get_id(const AVCodecTag *tags[4], unsigned int tag)
1788 for(i=0; tags && tags[i]; i++){
1789 enum CodecID id= codec_get_id(tags[i], tag);
1790 if(id!=CODEC_ID_NONE) return id;
1792 return CODEC_ID_NONE;
1795 /* absolute maximum size we read until we abort */
1796 #define MAX_READ_SIZE 5000000
1798 #define MAX_STD_TIMEBASES (60*12+5)
1799 static int get_std_framerate(int i){
1800 if(i<60*12) return i*1001;
1801 else return ((int[]){24,30,60,12,15})[i-60*12]*1000*12;
1805 * Is the time base unreliable.
1806 * This is a heuristic to balance between quick acceptance of the values in
1807 * the headers vs. some extra checks.
1808 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
1809 * MPEG-2 commonly misuses field repeat flags to store different framerates.
1810 * And there are "variable" fps files this needs to detect as well.
1812 static int tb_unreliable(AVCodecContext *c){
1813 if( c->time_base.den >= 101L*c->time_base.num
1814 || c->time_base.den < 5L*c->time_base.num
1815 /* || c->codec_tag == ff_get_fourcc("DIVX")
1816 || c->codec_tag == ff_get_fourcc("XVID")*/
1817 || c->codec_id == CODEC_ID_MPEG2VIDEO)
1822 int av_find_stream_info(AVFormatContext *ic)
1824 int i, count, ret, read_size, j;
1826 AVPacket pkt1, *pkt;
1827 int64_t last_dts[MAX_STREAMS];
1828 int duration_count[MAX_STREAMS]={0};
1829 double (*duration_error)[MAX_STD_TIMEBASES];
1830 offset_t old_offset = url_ftell(ic->pb);
1831 int64_t codec_info_duration[MAX_STREAMS]={0};
1832 int codec_info_nb_frames[MAX_STREAMS]={0};
1833 AVProbeData probe_data[MAX_STREAMS];
1834 int codec_identified[MAX_STREAMS]={0};
1836 duration_error = av_mallocz(MAX_STREAMS * sizeof(*duration_error));
1837 if (!duration_error) return AVERROR(ENOMEM);
1839 for(i=0;i<ic->nb_streams;i++) {
1840 st = ic->streams[i];
1841 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
1842 /* if(!st->time_base.num)
1844 if(!st->codec->time_base.num)
1845 st->codec->time_base= st->time_base;
1847 //only for the split stuff
1849 st->parser = av_parser_init(st->codec->codec_id);
1850 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
1851 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1856 for(i=0;i<MAX_STREAMS;i++){
1857 last_dts[i]= AV_NOPTS_VALUE;
1860 memset(probe_data, 0, sizeof(probe_data));
1864 /* check if one codec still needs to be handled */
1865 for(i=0;i<ic->nb_streams;i++) {
1866 st = ic->streams[i];
1867 if (!has_codec_parameters(st->codec))
1869 /* variable fps and no guess at the real fps */
1870 if( tb_unreliable(st->codec)
1871 && duration_count[i]<20 && st->codec->codec_type == CODEC_TYPE_VIDEO)
1873 if(st->parser && st->parser->parser->split && !st->codec->extradata)
1875 if(st->first_dts == AV_NOPTS_VALUE)
1878 if (i == ic->nb_streams) {
1879 /* NOTE: if the format has no header, then we need to read
1880 some packets to get most of the streams, so we cannot
1882 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
1883 /* if we found the info for all the codecs, we can stop */
1888 /* we did not get all the codec info, but we read too much data */
1889 if (read_size >= MAX_READ_SIZE) {
1894 /* NOTE: a new stream can be added there if no header in file
1895 (AVFMTCTX_NOHEADER) */
1896 ret = av_read_frame_internal(ic, &pkt1);
1899 ret = -1; /* we could not have all the codec parameters before EOF */
1900 for(i=0;i<ic->nb_streams;i++) {
1901 st = ic->streams[i];
1902 if (!has_codec_parameters(st->codec)){
1904 avcodec_string(buf, sizeof(buf), st->codec, 0);
1905 av_log(ic, AV_LOG_INFO, "Could not find codec parameters (%s)\n", buf);
1913 pkt= add_to_pktbuf(ic, &pkt1);
1914 if(av_dup_packet(pkt) < 0)
1915 return AVERROR(ENOMEM);
1917 read_size += pkt->size;
1919 st = ic->streams[pkt->stream_index];
1920 if(codec_info_nb_frames[st->index]>1)
1921 codec_info_duration[st->index] += pkt->duration;
1922 if (pkt->duration != 0)
1923 codec_info_nb_frames[st->index]++;
1926 int index= pkt->stream_index;
1927 int64_t last= last_dts[index];
1928 int64_t duration= pkt->dts - last;
1930 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
1931 double dur= duration * av_q2d(st->time_base);
1933 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
1934 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
1935 if(duration_count[index] < 2)
1936 memset(duration_error[index], 0, sizeof(*duration_error));
1937 for(i=1; i<MAX_STD_TIMEBASES; i++){
1938 int framerate= get_std_framerate(i);
1939 int ticks= lrintf(dur*framerate/(1001*12));
1940 double error= dur - ticks*1001*12/(double)framerate;
1941 duration_error[index][i] += error*error;
1943 duration_count[index]++;
1945 if(last == AV_NOPTS_VALUE || duration_count[index]<=1)
1946 last_dts[pkt->stream_index]= pkt->dts;
1948 if (st->codec->codec_id == CODEC_ID_NONE) {
1949 AVProbeData *pd = &(probe_data[st->index]);
1950 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
1951 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
1952 pd->buf_size += pkt->size;
1953 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
1956 if(st->parser && st->parser->parser->split && !st->codec->extradata){
1957 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
1959 st->codec->extradata_size= i;
1960 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1961 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
1962 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1966 /* if still no information, we try to open the codec and to
1967 decompress the frame. We try to avoid that in most cases as
1968 it takes longer and uses more memory. For MPEG-4, we need to
1969 decompress for QuickTime. */
1970 if (!has_codec_parameters(st->codec) /*&&
1971 (st->codec->codec_id == CODEC_ID_FLV1 ||
1972 st->codec->codec_id == CODEC_ID_H264 ||
1973 st->codec->codec_id == CODEC_ID_H263 ||
1974 st->codec->codec_id == CODEC_ID_H261 ||
1975 st->codec->codec_id == CODEC_ID_VORBIS ||
1976 st->codec->codec_id == CODEC_ID_MJPEG ||
1977 st->codec->codec_id == CODEC_ID_PNG ||
1978 st->codec->codec_id == CODEC_ID_PAM ||
1979 st->codec->codec_id == CODEC_ID_PGM ||
1980 st->codec->codec_id == CODEC_ID_PGMYUV ||
1981 st->codec->codec_id == CODEC_ID_PBM ||
1982 st->codec->codec_id == CODEC_ID_PPM ||
1983 st->codec->codec_id == CODEC_ID_SHORTEN ||
1984 (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/)
1985 try_decode_frame(st, pkt->data, pkt->size);
1987 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) {
1993 // close codecs which were opened in try_decode_frame()
1994 for(i=0;i<ic->nb_streams;i++) {
1995 st = ic->streams[i];
1996 if(st->codec->codec)
1997 avcodec_close(st->codec);
1999 for(i=0;i<ic->nb_streams;i++) {
2000 st = ic->streams[i];
2001 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2002 if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_sample)
2003 st->codec->codec_tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
2005 if(duration_count[i]
2006 && tb_unreliable(st->codec) /*&&
2007 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2008 st->time_base.num*duration_sum[i]/duration_count[i]*101LL > st->time_base.den*/){
2009 double best_error= 2*av_q2d(st->time_base);
2010 best_error= best_error*best_error*duration_count[i]*1000*12*30;
2012 for(j=1; j<MAX_STD_TIMEBASES; j++){
2013 double error= duration_error[i][j] * get_std_framerate(j);
2014 // if(st->codec->codec_type == CODEC_TYPE_VIDEO)
2015 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2016 if(error < best_error){
2018 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, get_std_framerate(j), 12*1001, INT_MAX);
2023 if (!st->r_frame_rate.num){
2024 if( st->codec->time_base.den * (int64_t)st->time_base.num
2025 <= st->codec->time_base.num * (int64_t)st->time_base.den){
2026 st->r_frame_rate.num = st->codec->time_base.den;
2027 st->r_frame_rate.den = st->codec->time_base.num;
2029 st->r_frame_rate.num = st->time_base.den;
2030 st->r_frame_rate.den = st->time_base.num;
2033 }else if(st->codec->codec_type == CODEC_TYPE_AUDIO) {
2034 if (st->codec->codec_id == CODEC_ID_NONE && probe_data[st->index].buf_size > 0) {
2035 codec_identified[st->index] = set_codec_from_probe_data(st, &(probe_data[st->index]), 1);
2036 if (codec_identified[st->index]) {
2037 st->need_parsing = AVSTREAM_PARSE_FULL;
2040 if(!st->codec->bits_per_sample)
2041 st->codec->bits_per_sample= av_get_bits_per_sample(st->codec->codec_id);
2045 av_estimate_timings(ic, old_offset);
2047 for(i=0;i<ic->nb_streams;i++) {
2048 st = ic->streams[i];
2049 if (codec_identified[st->index])
2052 //FIXME this is a mess
2053 if(i!=ic->nb_streams){
2054 av_read_frame_flush(ic);
2055 for(i=0;i<ic->nb_streams;i++) {
2056 st = ic->streams[i];
2057 if (codec_identified[st->index]) {
2058 av_seek_frame(ic, st->index, 0.0, 0);
2060 st->cur_dts= st->first_dts;
2062 url_fseek(ic->pb, ic->data_offset, SEEK_SET);
2066 /* correct DTS for B-frame streams with no timestamps */
2067 for(i=0;i<ic->nb_streams;i++) {
2068 st = ic->streams[i];
2069 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
2071 ppktl = &ic->packet_buffer;
2073 if(ppkt1->stream_index != i)
2075 if(ppkt1->pkt->dts < 0)
2077 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2079 ppkt1->pkt->dts -= delta;
2084 st->cur_dts -= delta;
2090 av_free(duration_error);
2091 for(i=0;i<MAX_STREAMS;i++){
2092 av_freep(&(probe_data[i].buf));
2098 /*******************************************************/
2100 int av_read_play(AVFormatContext *s)
2102 if (s->iformat->read_play)
2103 return s->iformat->read_play(s);
2105 return av_url_read_fpause(s->pb, 0);
2106 return AVERROR(ENOSYS);
2109 int av_read_pause(AVFormatContext *s)
2111 if (s->iformat->read_pause)
2112 return s->iformat->read_pause(s);
2114 return av_url_read_fpause(s->pb, 1);
2115 return AVERROR(ENOSYS);
2118 void av_close_input_stream(AVFormatContext *s)
2123 /* free previous packet */
2124 if (s->cur_st && s->cur_st->parser)
2125 av_free_packet(&s->cur_pkt);
2127 if (s->iformat->read_close)
2128 s->iformat->read_close(s);
2129 for(i=0;i<s->nb_streams;i++) {
2130 /* free all data in a stream component */
2133 av_parser_close(st->parser);
2135 av_free(st->index_entries);
2136 av_free(st->codec->extradata);
2138 av_free(st->filename);
2141 for(i=s->nb_programs-1; i>=0; i--) {
2142 av_freep(&s->programs[i]->provider_name);
2143 av_freep(&s->programs[i]->name);
2144 av_freep(&s->programs[i]->stream_index);
2145 av_freep(&s->programs[i]);
2147 flush_packet_queue(s);
2148 av_freep(&s->priv_data);
2152 void av_close_input_file(AVFormatContext *s)
2154 ByteIOContext *pb = s->iformat->flags & AVFMT_NOFILE ? NULL : s->pb;
2155 av_close_input_stream(s);
2160 AVStream *av_new_stream(AVFormatContext *s, int id)
2165 if (s->nb_streams >= MAX_STREAMS)
2168 st = av_mallocz(sizeof(AVStream));
2172 st->codec= avcodec_alloc_context();
2174 /* no default bitrate if decoding */
2175 st->codec->bit_rate = 0;
2177 st->index = s->nb_streams;
2179 st->start_time = AV_NOPTS_VALUE;
2180 st->duration = AV_NOPTS_VALUE;
2181 st->cur_dts = AV_NOPTS_VALUE;
2182 st->first_dts = AV_NOPTS_VALUE;
2184 /* default pts setting is MPEG-like */
2185 av_set_pts_info(st, 33, 1, 90000);
2186 st->last_IP_pts = AV_NOPTS_VALUE;
2187 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2188 st->pts_buffer[i]= AV_NOPTS_VALUE;
2190 s->streams[s->nb_streams++] = st;
2194 AVProgram *av_new_program(AVFormatContext *ac, int id)
2196 AVProgram *program=NULL;
2200 av_log(ac, AV_LOG_DEBUG, "new_program: id=0x%04x\n", id);
2203 for(i=0; i<ac->nb_programs; i++)
2204 if(ac->programs[i]->id == id)
2205 program = ac->programs[i];
2208 program = av_mallocz(sizeof(AVProgram));
2211 dynarray_add(&ac->programs, &ac->nb_programs, program);
2212 program->discard = AVDISCARD_NONE;
2219 void av_set_program_name(AVProgram *program, char *provider_name, char *name)
2221 assert(!provider_name == !name);
2223 av_free(program->provider_name);
2224 av_free(program-> name);
2225 program->provider_name = av_strdup(provider_name);
2226 program-> name = av_strdup( name);
2231 /************************************************************/
2232 /* output media file */
2234 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2238 if (s->oformat->priv_data_size > 0) {
2239 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2241 return AVERROR(ENOMEM);
2243 s->priv_data = NULL;
2245 if (s->oformat->set_parameters) {
2246 ret = s->oformat->set_parameters(s, ap);
2253 int av_write_header(AVFormatContext *s)
2258 // some sanity checks
2259 for(i=0;i<s->nb_streams;i++) {
2262 switch (st->codec->codec_type) {
2263 case CODEC_TYPE_AUDIO:
2264 if(st->codec->sample_rate<=0){
2265 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2269 case CODEC_TYPE_VIDEO:
2270 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2271 av_log(s, AV_LOG_ERROR, "time base not set\n");
2274 if(st->codec->width<=0 || st->codec->height<=0){
2275 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2281 if(s->oformat->codec_tag){
2282 if(st->codec->codec_tag){
2284 //check that tag + id is in the table
2285 //if neither is in the table -> OK
2286 //if tag is in the table with another id -> FAIL
2287 //if id is in the table with another tag -> FAIL unless strict < ?
2289 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2293 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2294 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2296 return AVERROR(ENOMEM);
2299 if(s->oformat->write_header){
2300 ret = s->oformat->write_header(s);
2305 /* init PTS generation */
2306 for(i=0;i<s->nb_streams;i++) {
2307 int64_t den = AV_NOPTS_VALUE;
2310 switch (st->codec->codec_type) {
2311 case CODEC_TYPE_AUDIO:
2312 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2314 case CODEC_TYPE_VIDEO:
2315 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2320 if (den != AV_NOPTS_VALUE) {
2322 return AVERROR_INVALIDDATA;
2323 av_frac_init(&st->pts, 0, 0, den);
2329 //FIXME merge with compute_pkt_fields
2330 static int compute_pkt_fields2(AVStream *st, AVPacket *pkt){
2331 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2332 int num, den, frame_size, i;
2334 // 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);
2336 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2339 /* duration field */
2340 if (pkt->duration == 0) {
2341 compute_frame_duration(&num, &den, st, NULL, pkt);
2343 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num);
2347 //XXX/FIXME this is a temporary hack until all encoders output pts
2348 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2350 // pkt->pts= st->cur_dts;
2351 pkt->pts= st->pts.val;
2354 //calculate dts from pts
2355 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){
2356 st->pts_buffer[0]= pkt->pts;
2357 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2358 st->pts_buffer[i]= (i-delay-1) * pkt->duration;
2359 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2360 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2362 pkt->dts= st->pts_buffer[0];
2365 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2366 av_log(NULL, AV_LOG_ERROR, "error, non monotone timestamps %"PRId64" >= %"PRId64"\n", st->cur_dts, pkt->dts);
2369 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
2370 av_log(NULL, AV_LOG_ERROR, "error, pts < dts\n");
2374 // av_log(NULL, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
2375 st->cur_dts= pkt->dts;
2376 st->pts.val= pkt->dts;
2379 switch (st->codec->codec_type) {
2380 case CODEC_TYPE_AUDIO:
2381 frame_size = get_audio_frame_size(st->codec, pkt->size);
2383 /* HACK/FIXME, we skip the initial 0 size packets as they are most
2384 likely equal to the encoder delay, but it would be better if we
2385 had the real timestamps from the encoder */
2386 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
2387 av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
2390 case CODEC_TYPE_VIDEO:
2391 av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
2399 static void truncate_ts(AVStream *st, AVPacket *pkt){
2400 int64_t pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
2403 // pkt->dts= 0; //this happens for low_delay=0 and B-frames, FIXME, needs further investigation about what we should do here
2405 if (pkt->pts != AV_NOPTS_VALUE)
2406 pkt->pts &= pts_mask;
2407 if (pkt->dts != AV_NOPTS_VALUE)
2408 pkt->dts &= pts_mask;
2411 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
2415 ret=compute_pkt_fields2(s->streams[pkt->stream_index], pkt);
2416 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2419 truncate_ts(s->streams[pkt->stream_index], pkt);
2421 ret= s->oformat->write_packet(s, pkt);
2423 ret= url_ferror(s->pb);
2427 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
2428 AVPacketList *pktl, **next_point, *this_pktl;
2430 int streams[MAX_STREAMS];
2433 AVStream *st= s->streams[ pkt->stream_index];
2435 // assert(pkt->destruct != av_destruct_packet); //FIXME
2437 this_pktl = av_mallocz(sizeof(AVPacketList));
2438 this_pktl->pkt= *pkt;
2439 if(pkt->destruct == av_destruct_packet)
2440 pkt->destruct= NULL; // not shared -> must keep original from being freed
2442 av_dup_packet(&this_pktl->pkt); //shared -> must dup
2444 next_point = &s->packet_buffer;
2446 AVStream *st2= s->streams[ (*next_point)->pkt.stream_index];
2447 int64_t left= st2->time_base.num * (int64_t)st ->time_base.den;
2448 int64_t right= st ->time_base.num * (int64_t)st2->time_base.den;
2449 if((*next_point)->pkt.dts * left > pkt->dts * right) //FIXME this can overflow
2451 next_point= &(*next_point)->next;
2453 this_pktl->next= *next_point;
2454 *next_point= this_pktl;
2457 memset(streams, 0, sizeof(streams));
2458 pktl= s->packet_buffer;
2460 //av_log(s, AV_LOG_DEBUG, "show st:%d dts:%"PRId64"\n", pktl->pkt.stream_index, pktl->pkt.dts);
2461 if(streams[ pktl->pkt.stream_index ] == 0)
2463 streams[ pktl->pkt.stream_index ]++;
2467 if(s->nb_streams == stream_count || (flush && stream_count)){
2468 pktl= s->packet_buffer;
2471 s->packet_buffer= pktl->next;
2475 av_init_packet(out);
2481 * Interleaves an AVPacket correctly so it can be muxed.
2482 * @param out the interleaved packet will be output here
2483 * @param in the input packet
2484 * @param flush 1 if no further packets are available as input and all
2485 * remaining packets should be output
2486 * @return 1 if a packet was output, 0 if no packet could be output,
2487 * < 0 if an error occured
2489 static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
2490 if(s->oformat->interleave_packet)
2491 return s->oformat->interleave_packet(s, out, in, flush);
2493 return av_interleave_packet_per_dts(s, out, in, flush);
2496 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
2497 AVStream *st= s->streams[ pkt->stream_index];
2499 //FIXME/XXX/HACK drop zero sized packets
2500 if(st->codec->codec_type == CODEC_TYPE_AUDIO && pkt->size==0)
2503 //av_log(NULL, AV_LOG_DEBUG, "av_interleaved_write_frame %d %"PRId64" %"PRId64"\n", pkt->size, pkt->dts, pkt->pts);
2504 if(compute_pkt_fields2(st, pkt) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
2507 if(pkt->dts == AV_NOPTS_VALUE)
2512 int ret= av_interleave_packet(s, &opkt, pkt, 0);
2513 if(ret<=0) //FIXME cleanup needed for ret<0 ?
2516 truncate_ts(s->streams[opkt.stream_index], &opkt);
2517 ret= s->oformat->write_packet(s, &opkt);
2519 av_free_packet(&opkt);
2524 if(url_ferror(s->pb))
2525 return url_ferror(s->pb);
2529 int av_write_trailer(AVFormatContext *s)
2535 ret= av_interleave_packet(s, &pkt, NULL, 1);
2536 if(ret<0) //FIXME cleanup needed for ret<0 ?
2541 truncate_ts(s->streams[pkt.stream_index], &pkt);
2542 ret= s->oformat->write_packet(s, &pkt);
2544 av_free_packet(&pkt);
2548 if(url_ferror(s->pb))
2552 if(s->oformat->write_trailer)
2553 ret = s->oformat->write_trailer(s);
2556 ret=url_ferror(s->pb);
2557 for(i=0;i<s->nb_streams;i++)
2558 av_freep(&s->streams[i]->priv_data);
2559 av_freep(&s->priv_data);
2563 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
2566 AVProgram *program=NULL;
2569 for(i=0; i<ac->nb_programs; i++){
2570 if(ac->programs[i]->id != progid)
2572 program = ac->programs[i];
2573 for(j=0; j<program->nb_stream_indexes; j++)
2574 if(program->stream_index[j] == idx)
2577 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
2580 program->stream_index = tmp;
2581 program->stream_index[program->nb_stream_indexes++] = idx;
2586 /* "user interface" functions */
2587 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
2590 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
2591 AVStream *st = ic->streams[i];
2592 int g = ff_gcd(st->time_base.num, st->time_base.den);
2593 avcodec_string(buf, sizeof(buf), st->codec, is_output);
2594 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
2595 /* the pid is an important information, so we display it */
2596 /* XXX: add a generic system */
2597 if (flags & AVFMT_SHOW_IDS)
2598 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
2599 if (strlen(st->language) > 0)
2600 av_log(NULL, AV_LOG_INFO, "(%s)", st->language);
2601 av_log(NULL, AV_LOG_DEBUG, ", %d/%d", st->time_base.num/g, st->time_base.den/g);
2602 av_log(NULL, AV_LOG_INFO, ": %s", buf);
2603 if(st->codec->codec_type == CODEC_TYPE_VIDEO){
2604 if(st->r_frame_rate.den && st->r_frame_rate.num)
2605 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(r)", av_q2d(st->r_frame_rate));
2606 /* else if(st->time_base.den && st->time_base.num)
2607 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(m)", 1/av_q2d(st->time_base));*/
2609 av_log(NULL, AV_LOG_INFO, ", %5.2f tb(c)", 1/av_q2d(st->codec->time_base));
2611 av_log(NULL, AV_LOG_INFO, "\n");
2614 void dump_format(AVFormatContext *ic,
2621 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
2622 is_output ? "Output" : "Input",
2624 is_output ? ic->oformat->name : ic->iformat->name,
2625 is_output ? "to" : "from", url);
2627 av_log(NULL, AV_LOG_INFO, " Duration: ");
2628 if (ic->duration != AV_NOPTS_VALUE) {
2629 int hours, mins, secs, us;
2630 secs = ic->duration / AV_TIME_BASE;
2631 us = ic->duration % AV_TIME_BASE;
2636 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%01d", hours, mins, secs,
2637 (10 * us) / AV_TIME_BASE);
2639 av_log(NULL, AV_LOG_INFO, "N/A");
2641 if (ic->start_time != AV_NOPTS_VALUE) {
2643 av_log(NULL, AV_LOG_INFO, ", start: ");
2644 secs = ic->start_time / AV_TIME_BASE;
2645 us = ic->start_time % AV_TIME_BASE;
2646 av_log(NULL, AV_LOG_INFO, "%d.%06d",
2647 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
2649 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
2651 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
2653 av_log(NULL, AV_LOG_INFO, "N/A");
2655 av_log(NULL, AV_LOG_INFO, "\n");
2657 if(ic->nb_programs) {
2659 for(j=0; j<ic->nb_programs; j++) {
2660 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
2661 ic->programs[j]->name ? ic->programs[j]->name : "");
2662 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++)
2663 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
2666 for(i=0;i<ic->nb_streams;i++)
2667 dump_stream_format(ic, i, index, is_output);
2670 int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
2672 return av_parse_video_frame_size(width_ptr, height_ptr, str);
2675 int parse_frame_rate(int *frame_rate_num, int *frame_rate_den, const char *arg)
2677 AVRational frame_rate;
2678 int ret = av_parse_video_frame_rate(&frame_rate, arg);
2679 *frame_rate_num= frame_rate.num;
2680 *frame_rate_den= frame_rate.den;
2685 * Gets the current time in microseconds.
2687 int64_t av_gettime(void)
2690 gettimeofday(&tv,NULL);
2691 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
2694 int64_t parse_date(const char *datestr, int duration)
2700 static const char *date_fmt[] = {
2704 static const char *time_fmt[] = {
2714 time_t now = time(0);
2716 len = strlen(datestr);
2718 lastch = datestr[len - 1];
2721 is_utc = (lastch == 'z' || lastch == 'Z');
2723 memset(&dt, 0, sizeof(dt));
2728 /* parse the year-month-day part */
2729 for (i = 0; i < sizeof(date_fmt) / sizeof(date_fmt[0]); i++) {
2730 q = small_strptime(p, date_fmt[i], &dt);
2736 /* if the year-month-day part is missing, then take the
2737 * current year-month-day time */
2742 dt = *localtime(&now);
2744 dt.tm_hour = dt.tm_min = dt.tm_sec = 0;
2749 if (*p == 'T' || *p == 't' || *p == ' ')
2752 /* parse the hour-minute-second part */
2753 for (i = 0; i < sizeof(time_fmt) / sizeof(time_fmt[0]); i++) {
2754 q = small_strptime(p, time_fmt[i], &dt);
2760 /* parse datestr as a duration */
2765 /* parse datestr as HH:MM:SS */
2766 q = small_strptime(p, time_fmt[0], &dt);
2768 /* parse datestr as S+ */
2769 dt.tm_sec = strtol(p, (char **)&q, 10);
2771 /* the parsing didn't succeed */
2778 /* Now we have all the fields that we can get */
2784 t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec;
2786 dt.tm_isdst = -1; /* unknown */
2796 /* parse the .m... part */
2800 for (val = 0, n = 100000; n >= 1; n /= 10, q++) {
2803 val += n * (*q - '0');
2807 return negative ? -t : t;
2810 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
2820 while (*p != '\0' && *p != '=' && *p != '&') {
2821 if ((q - tag) < sizeof(tag) - 1)
2829 while (*p != '&' && *p != '\0') {
2830 if ((q - arg) < arg_size - 1) {
2840 if (!strcmp(tag, tag1))
2849 int av_get_frame_filename(char *buf, int buf_size,
2850 const char *path, int number)
2853 char *q, buf1[20], c;
2854 int nd, len, percentd_found;
2866 while (isdigit(*p)) {
2867 nd = nd * 10 + *p++ - '0';
2870 } while (isdigit(c));
2879 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
2881 if ((q - buf + len) > buf_size - 1)
2883 memcpy(q, buf1, len);
2891 if ((q - buf) < buf_size - 1)
2895 if (!percentd_found)
2904 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
2907 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
2909 for(i=0;i<size;i+=16) {
2916 PRINT(" %02x", buf[i+j]);
2921 for(j=0;j<len;j++) {
2923 if (c < ' ' || c > '~')
2932 void av_hex_dump(FILE *f, uint8_t *buf, int size)
2934 hex_dump_internal(NULL, f, 0, buf, size);
2937 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
2939 hex_dump_internal(avcl, NULL, level, buf, size);
2942 //FIXME needs to know the time_base
2943 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload)
2945 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
2946 PRINT("stream #%d:\n", pkt->stream_index);
2947 PRINT(" keyframe=%d\n", ((pkt->flags & PKT_FLAG_KEY) != 0));
2948 PRINT(" duration=%0.3f\n", (double)pkt->duration / AV_TIME_BASE);
2949 /* DTS is _always_ valid after av_read_frame() */
2951 if (pkt->dts == AV_NOPTS_VALUE)
2954 PRINT("%0.3f", (double)pkt->dts / AV_TIME_BASE);
2955 /* PTS may not be known if B-frames are present. */
2957 if (pkt->pts == AV_NOPTS_VALUE)
2960 PRINT("%0.3f", (double)pkt->pts / AV_TIME_BASE);
2962 PRINT(" size=%d\n", pkt->size);
2965 av_hex_dump(f, pkt->data, pkt->size);
2968 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
2970 pkt_dump_internal(NULL, f, 0, pkt, dump_payload);
2973 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
2975 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload);
2978 void url_split(char *proto, int proto_size,
2979 char *authorization, int authorization_size,
2980 char *hostname, int hostname_size,
2982 char *path, int path_size,
2985 const char *p, *ls, *at, *col, *brk;
2987 if (port_ptr) *port_ptr = -1;
2988 if (proto_size > 0) proto[0] = 0;
2989 if (authorization_size > 0) authorization[0] = 0;
2990 if (hostname_size > 0) hostname[0] = 0;
2991 if (path_size > 0) path[0] = 0;
2993 /* parse protocol */
2994 if ((p = strchr(url, ':'))) {
2995 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3000 /* no protocol means plain filename */
3001 av_strlcpy(path, url, path_size);
3005 /* separate path from hostname */
3006 ls = strchr(p, '/');
3008 ls = strchr(p, '?');
3010 av_strlcpy(path, ls, path_size);
3012 ls = &p[strlen(p)]; // XXX
3014 /* the rest is hostname, use that to parse auth/port */
3016 /* authorization (user[:pass]@hostname) */
3017 if ((at = strchr(p, '@')) && at < ls) {
3018 av_strlcpy(authorization, p,
3019 FFMIN(authorization_size, at + 1 - p));
3020 p = at + 1; /* skip '@' */
3023 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3025 av_strlcpy(hostname, p + 1,
3026 FFMIN(hostname_size, brk - p));
3027 if (brk[1] == ':' && port_ptr)
3028 *port_ptr = atoi(brk + 2);
3029 } else if ((col = strchr(p, ':')) && col < ls) {
3030 av_strlcpy(hostname, p,
3031 FFMIN(col + 1 - p, hostname_size));
3032 if (port_ptr) *port_ptr = atoi(col + 1);
3034 av_strlcpy(hostname, p,
3035 FFMIN(ls + 1 - p, hostname_size));
3039 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3040 int pts_num, int pts_den)
3042 s->pts_wrap_bits = pts_wrap_bits;
3043 s->time_base.num = pts_num;
3044 s->time_base.den = pts_den;
3047 /* fraction handling */
3050 * f = val + (num / den) + 0.5.
3052 * 'num' is normalized so that it is such as 0 <= num < den.
3054 * @param f fractional number
3055 * @param val integer value
3056 * @param num must be >= 0
3057 * @param den must be >= 1
3059 static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
3072 * Fractional addition to f: f = f + (incr / f->den).
3074 * @param f fractional number
3075 * @param incr increment, can be positive or negative
3077 static void av_frac_add(AVFrac *f, int64_t incr)
3081 num = f->num + incr;
3084 f->val += num / den;
3090 } else if (num >= den) {
3091 f->val += num / den;