2 * various utility functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "avio_internal.h"
27 #include "libavcodec/internal.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/pixdesc.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/mathematics.h"
36 #include "audiointerleave.h"
51 * various utility functions for use within Libav
54 unsigned avformat_version(void)
56 return LIBAVFORMAT_VERSION_INT;
59 const char *avformat_configuration(void)
61 return LIBAV_CONFIGURATION;
64 const char *avformat_license(void)
66 #define LICENSE_PREFIX "libavformat license: "
67 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
70 /* fraction handling */
73 * f = val + (num / den) + 0.5.
75 * 'num' is normalized so that it is such as 0 <= num < den.
77 * @param f fractional number
78 * @param val integer value
79 * @param num must be >= 0
80 * @param den must be >= 1
82 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
95 * Fractional addition to f: f = f + (incr / f->den).
97 * @param f fractional number
98 * @param incr increment, can be positive or negative
100 static void frac_add(AVFrac *f, int64_t incr)
113 } else if (num >= den) {
120 /** head of registered input format linked list */
121 static AVInputFormat *first_iformat = NULL;
122 /** head of registered output format linked list */
123 static AVOutputFormat *first_oformat = NULL;
125 AVInputFormat *av_iformat_next(AVInputFormat *f)
127 if(f) return f->next;
128 else return first_iformat;
131 AVOutputFormat *av_oformat_next(AVOutputFormat *f)
133 if(f) return f->next;
134 else return first_oformat;
137 void av_register_input_format(AVInputFormat *format)
141 while (*p != NULL) p = &(*p)->next;
146 void av_register_output_format(AVOutputFormat *format)
150 while (*p != NULL) p = &(*p)->next;
155 int av_match_ext(const char *filename, const char *extensions)
163 ext = strrchr(filename, '.');
169 while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1)
172 if (!strcasecmp(ext1, ext))
182 static int match_format(const char *name, const char *names)
190 namelen = strlen(name);
191 while ((p = strchr(names, ','))) {
192 len = FFMAX(p - names, namelen);
193 if (!strncasecmp(name, names, len))
197 return !strcasecmp(name, names);
200 AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
201 const char *mime_type)
203 AVOutputFormat *fmt = NULL, *fmt_found;
204 int score_max, score;
206 /* specific test for image sequences */
207 #if CONFIG_IMAGE2_MUXER
208 if (!short_name && filename &&
209 av_filename_number_test(filename) &&
210 ff_guess_image2_codec(filename) != CODEC_ID_NONE) {
211 return av_guess_format("image2", NULL, NULL);
214 /* Find the proper file type. */
217 while ((fmt = av_oformat_next(fmt))) {
219 if (fmt->name && short_name && !strcmp(fmt->name, short_name))
221 if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
223 if (filename && fmt->extensions &&
224 av_match_ext(filename, fmt->extensions)) {
227 if (score > score_max) {
235 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
236 const char *filename, const char *mime_type, enum AVMediaType type){
237 if(type == AVMEDIA_TYPE_VIDEO){
238 enum CodecID codec_id= CODEC_ID_NONE;
240 #if CONFIG_IMAGE2_MUXER
241 if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){
242 codec_id= ff_guess_image2_codec(filename);
245 if(codec_id == CODEC_ID_NONE)
246 codec_id= fmt->video_codec;
248 }else if(type == AVMEDIA_TYPE_AUDIO)
249 return fmt->audio_codec;
250 else if (type == AVMEDIA_TYPE_SUBTITLE)
251 return fmt->subtitle_codec;
253 return CODEC_ID_NONE;
256 AVInputFormat *av_find_input_format(const char *short_name)
258 AVInputFormat *fmt = NULL;
259 while ((fmt = av_iformat_next(fmt))) {
260 if (match_format(short_name, fmt->name))
267 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
269 int ret= av_new_packet(pkt, size);
274 pkt->pos= avio_tell(s);
276 ret= avio_read(s, pkt->data, size);
280 av_shrink_packet(pkt, ret);
285 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
290 return av_get_packet(s, pkt, size);
291 old_size = pkt->size;
292 ret = av_grow_packet(pkt, size);
295 ret = avio_read(s, pkt->data + old_size, size);
296 av_shrink_packet(pkt, old_size + FFMAX(ret, 0));
301 int av_filename_number_test(const char *filename)
304 return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0);
307 AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max)
309 AVProbeData lpd = *pd;
310 AVInputFormat *fmt1 = NULL, *fmt;
313 if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
314 int id3len = ff_id3v2_tag_len(lpd.buf);
315 if (lpd.buf_size > id3len + 16) {
317 lpd.buf_size -= id3len;
323 while ((fmt1 = av_iformat_next(fmt1))) {
324 if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
327 if (fmt1->read_probe) {
328 score = fmt1->read_probe(&lpd);
329 } else if (fmt1->extensions) {
330 if (av_match_ext(lpd.filename, fmt1->extensions)) {
334 if (score > *score_max) {
337 }else if (score == *score_max)
341 /* a hack for files with huge id3v2 tags -- try to guess by file extension. */
342 if (!fmt && id3 && *score_max < AVPROBE_SCORE_MAX/4) {
343 while ((fmt = av_iformat_next(fmt)))
344 if (fmt->extensions && av_match_ext(lpd.filename, fmt->extensions)) {
345 *score_max = AVPROBE_SCORE_MAX/4;
353 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){
355 return av_probe_input_format2(pd, is_opened, &score);
358 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd, int score)
360 static const struct {
361 const char *name; enum CodecID id; enum AVMediaType type;
363 { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO },
364 { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO },
365 { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO },
366 { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO },
367 { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO },
368 { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO },
369 { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO },
370 { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
373 AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
377 av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n",
378 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score);
379 for (i = 0; fmt_id_type[i].name; i++) {
380 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
381 st->codec->codec_id = fmt_id_type[i].id;
382 st->codec->codec_type = fmt_id_type[i].type;
390 /************************************************************/
391 /* input media file */
393 #if FF_API_FORMAT_PARAMETERS
394 static AVDictionary *convert_format_parameters(AVFormatParameters *ap)
397 AVDictionary *opts = NULL;
402 if (ap->time_base.num) {
403 snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num);
404 av_dict_set(&opts, "framerate", buf, 0);
406 if (ap->sample_rate) {
407 snprintf(buf, sizeof(buf), "%d", ap->sample_rate);
408 av_dict_set(&opts, "sample_rate", buf, 0);
411 snprintf(buf, sizeof(buf), "%d", ap->channels);
412 av_dict_set(&opts, "channels", buf, 0);
414 if (ap->width || ap->height) {
415 snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height);
416 av_dict_set(&opts, "video_size", buf, 0);
418 if (ap->pix_fmt != PIX_FMT_NONE) {
419 av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0);
422 snprintf(buf, sizeof(buf), "%d", ap->channel);
423 av_dict_set(&opts, "channel", buf, 0);
426 av_dict_set(&opts, "standard", ap->standard, 0);
428 if (ap->mpeg2ts_compute_pcr) {
429 av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0);
431 if (ap->initial_pause) {
432 av_dict_set(&opts, "initial_pause", "1", 0);
438 * Open a media file from an IO stream. 'fmt' must be specified.
440 int av_open_input_stream(AVFormatContext **ic_ptr,
441 AVIOContext *pb, const char *filename,
442 AVInputFormat *fmt, AVFormatParameters *ap)
447 AVFormatParameters default_ap;
451 memset(ap, 0, sizeof(default_ap));
453 opts = convert_format_parameters(ap);
455 if(!ap->prealloced_context)
456 ic = avformat_alloc_context();
460 err = AVERROR(ENOMEM);
463 if (pb && fmt && fmt->flags & AVFMT_NOFILE)
464 av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
465 "will be ignored with AVFMT_NOFILE format.\n");
469 if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0)
471 ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above
480 /** size of probe buffer, for guessing file type from file contents */
481 #define PROBE_BUF_MIN 2048
482 #define PROBE_BUF_MAX (1<<20)
484 int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
485 const char *filename, void *logctx,
486 unsigned int offset, unsigned int max_probe_size)
488 AVProbeData pd = { filename ? filename : "", NULL, -offset };
489 unsigned char *buf = NULL;
490 int ret = 0, probe_size;
492 if (!max_probe_size) {
493 max_probe_size = PROBE_BUF_MAX;
494 } else if (max_probe_size > PROBE_BUF_MAX) {
495 max_probe_size = PROBE_BUF_MAX;
496 } else if (max_probe_size < PROBE_BUF_MIN) {
497 return AVERROR(EINVAL);
500 if (offset >= max_probe_size) {
501 return AVERROR(EINVAL);
504 for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
505 probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
506 int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0;
507 int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1;
509 if (probe_size < offset) {
513 /* read probe data */
514 buf = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE);
515 if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) {
516 /* fail if error was not end of file, otherwise, lower score */
517 if (ret != AVERROR_EOF) {
522 ret = 0; /* error was end of file, nothing read */
525 pd.buf = &buf[offset];
527 memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
529 /* guess file format */
530 *fmt = av_probe_input_format2(&pd, 1, &score);
532 if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration
533 av_log(logctx, AV_LOG_WARNING, "Format detected only with low score of %d, misdetection possible!\n", score);
535 av_log(logctx, AV_LOG_DEBUG, "Probed with size=%d and score=%d\n", probe_size, score);
541 return AVERROR_INVALIDDATA;
544 /* rewind. reuse probe buffer to avoid seeking */
545 if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
551 #if FF_API_FORMAT_PARAMETERS
552 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
555 AVFormatParameters *ap)
558 AVDictionary *opts = convert_format_parameters(ap);
560 if (!ap || !ap->prealloced_context)
563 err = avformat_open_input(ic_ptr, filename, fmt, &opts);
570 /* open input file and probe the format if necessary */
571 static int init_input(AVFormatContext *s, const char *filename)
574 AVProbeData pd = {filename, NULL, 0};
577 s->flags |= AVFMT_FLAG_CUSTOM_IO;
579 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
580 else if (s->iformat->flags & AVFMT_NOFILE)
581 return AVERROR(EINVAL);
585 if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
586 (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
589 if ((ret = avio_open(&s->pb, filename, AVIO_FLAG_READ)) < 0)
593 return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0);
596 int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
598 AVFormatContext *s = *ps;
600 AVFormatParameters ap = { { 0 } };
601 AVDictionary *tmp = NULL;
603 if (!s && !(s = avformat_alloc_context()))
604 return AVERROR(ENOMEM);
609 av_dict_copy(&tmp, *options, 0);
611 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
614 if ((ret = init_input(s, filename)) < 0)
617 /* check filename in case an image number is expected */
618 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
619 if (!av_filename_number_test(filename)) {
620 ret = AVERROR(EINVAL);
625 s->duration = s->start_time = AV_NOPTS_VALUE;
626 av_strlcpy(s->filename, filename, sizeof(s->filename));
628 /* allocate private data */
629 if (s->iformat->priv_data_size > 0) {
630 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
631 ret = AVERROR(ENOMEM);
634 if (s->iformat->priv_class) {
635 *(const AVClass**)s->priv_data = s->iformat->priv_class;
636 av_opt_set_defaults(s->priv_data);
637 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
642 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
644 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC);
646 if (s->iformat->read_header)
647 if ((ret = s->iformat->read_header(s, &ap)) < 0)
650 if (s->pb && !s->data_offset)
651 s->data_offset = avio_tell(s->pb);
653 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
656 av_dict_free(options);
664 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
666 avformat_free_context(s);
671 /*******************************************************/
673 static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
674 AVPacketList **plast_pktl){
675 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
680 (*plast_pktl)->next = pktl;
682 *packet_buffer = pktl;
684 /* add the packet in the buffered packet list */
690 int av_read_packet(AVFormatContext *s, AVPacket *pkt)
696 AVPacketList *pktl = s->raw_packet_buffer;
700 if(s->streams[pkt->stream_index]->codec->codec_id != CODEC_ID_PROBE ||
701 !s->streams[pkt->stream_index]->probe_packets ||
702 s->raw_packet_buffer_remaining_size < pkt->size){
703 AVProbeData *pd = &s->streams[pkt->stream_index]->probe_data;
706 s->raw_packet_buffer = pktl->next;
707 s->raw_packet_buffer_remaining_size += pkt->size;
714 ret= s->iformat->read_packet(s, pkt);
716 if (!pktl || ret == AVERROR(EAGAIN))
718 for (i = 0; i < s->nb_streams; i++)
719 s->streams[i]->probe_packets = 0;
723 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
724 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
725 av_log(s, AV_LOG_WARNING,
726 "Dropped corrupted packet (stream = %d)\n",
731 st= s->streams[pkt->stream_index];
733 switch(st->codec->codec_type){
734 case AVMEDIA_TYPE_VIDEO:
735 if(s->video_codec_id) st->codec->codec_id= s->video_codec_id;
737 case AVMEDIA_TYPE_AUDIO:
738 if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id;
740 case AVMEDIA_TYPE_SUBTITLE:
741 if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id;
745 if(!pktl && (st->codec->codec_id != CODEC_ID_PROBE ||
749 add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
750 s->raw_packet_buffer_remaining_size -= pkt->size;
752 if(st->codec->codec_id == CODEC_ID_PROBE){
753 AVProbeData *pd = &st->probe_data;
754 av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
757 pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
758 memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size);
759 pd->buf_size += pkt->size;
760 memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE);
762 if(av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){
763 //FIXME we dont reduce score to 0 for the case of running out of buffer space in bytes
764 set_codec_from_probe_data(s, st, pd, st->probe_packets > 0 ? AVPROBE_SCORE_MAX/4 : 0);
765 if(st->codec->codec_id != CODEC_ID_PROBE){
768 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
775 /**********************************************************/
778 * Get the number of samples of an audio frame. Return -1 on error.
780 static int get_audio_frame_size(AVCodecContext *enc, int size)
784 if(enc->codec_id == CODEC_ID_VORBIS)
787 if (enc->frame_size <= 1) {
788 int bits_per_sample = av_get_bits_per_sample(enc->codec_id);
790 if (bits_per_sample) {
791 if (enc->channels == 0)
793 frame_size = (size << 3) / (bits_per_sample * enc->channels);
795 /* used for example by ADPCM codecs */
796 if (enc->bit_rate == 0)
798 frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate;
801 frame_size = enc->frame_size;
808 * Return the frame duration in seconds. Return 0 if not available.
810 static void compute_frame_duration(int *pnum, int *pden, AVStream *st,
811 AVCodecParserContext *pc, AVPacket *pkt)
817 switch(st->codec->codec_type) {
818 case AVMEDIA_TYPE_VIDEO:
819 if(st->time_base.num*1000LL > st->time_base.den){
820 *pnum = st->time_base.num;
821 *pden = st->time_base.den;
822 }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){
823 *pnum = st->codec->time_base.num;
824 *pden = st->codec->time_base.den;
825 if (pc && pc->repeat_pict) {
826 *pnum = (*pnum) * (1 + pc->repeat_pict);
828 //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet
829 //Thus if we have no parser in such case leave duration undefined.
830 if(st->codec->ticks_per_frame>1 && !pc){
835 case AVMEDIA_TYPE_AUDIO:
836 frame_size = get_audio_frame_size(st->codec, pkt->size);
837 if (frame_size <= 0 || st->codec->sample_rate <= 0)
840 *pden = st->codec->sample_rate;
847 static int is_intra_only(AVCodecContext *enc){
848 if(enc->codec_type == AVMEDIA_TYPE_AUDIO){
850 }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){
851 switch(enc->codec_id){
853 case CODEC_ID_MJPEGB:
855 case CODEC_ID_PRORES:
856 case CODEC_ID_RAWVIDEO:
857 case CODEC_ID_DVVIDEO:
858 case CODEC_ID_HUFFYUV:
859 case CODEC_ID_FFVHUFF:
864 case CODEC_ID_JPEG2000:
872 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
873 int64_t dts, int64_t pts)
875 AVStream *st= s->streams[stream_index];
876 AVPacketList *pktl= s->packet_buffer;
878 if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE)
881 st->first_dts= dts - st->cur_dts;
884 for(; pktl; pktl= pktl->next){
885 if(pktl->pkt.stream_index != stream_index)
887 //FIXME think more about this check
888 if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
889 pktl->pkt.pts += st->first_dts;
891 if(pktl->pkt.dts != AV_NOPTS_VALUE)
892 pktl->pkt.dts += st->first_dts;
894 if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
895 st->start_time= pktl->pkt.pts;
897 if (st->start_time == AV_NOPTS_VALUE)
898 st->start_time = pts;
901 static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt)
903 AVPacketList *pktl= s->packet_buffer;
906 if(st->first_dts != AV_NOPTS_VALUE){
907 cur_dts= st->first_dts;
908 for(; pktl; pktl= pktl->next){
909 if(pktl->pkt.stream_index == pkt->stream_index){
910 if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration)
912 cur_dts -= pkt->duration;
915 pktl= s->packet_buffer;
916 st->first_dts = cur_dts;
917 }else if(st->cur_dts)
920 for(; pktl; pktl= pktl->next){
921 if(pktl->pkt.stream_index != pkt->stream_index)
923 if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE
924 && !pktl->pkt.duration){
925 pktl->pkt.dts= cur_dts;
926 if(!st->codec->has_b_frames)
927 pktl->pkt.pts= cur_dts;
928 cur_dts += pkt->duration;
929 pktl->pkt.duration= pkt->duration;
933 if(st->first_dts == AV_NOPTS_VALUE)
934 st->cur_dts= cur_dts;
937 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
938 AVCodecParserContext *pc, AVPacket *pkt)
940 int num, den, presentation_delayed, delay, i;
943 if (s->flags & AVFMT_FLAG_NOFILLIN)
946 if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
947 pkt->dts= AV_NOPTS_VALUE;
949 if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B)
950 //FIXME Set low_delay = 0 when has_b_frames = 1
951 st->codec->has_b_frames = 1;
953 /* do we have a video B-frame ? */
954 delay= st->codec->has_b_frames;
955 presentation_delayed = 0;
957 // ignore delay caused by frame threading so that the mpeg2-without-dts
958 // warning will not trigger
959 if (delay && st->codec->active_thread_type&FF_THREAD_FRAME)
960 delay -= st->codec->thread_count-1;
962 /* XXX: need has_b_frame, but cannot get it if the codec is
965 pc && pc->pict_type != AV_PICTURE_TYPE_B)
966 presentation_delayed = 1;
968 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63
969 /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){
970 pkt->dts -= 1LL<<st->pts_wrap_bits;
973 // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
974 // we take the conservative approach and discard both
975 // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
976 if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
977 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
978 pkt->dts= pkt->pts= AV_NOPTS_VALUE;
981 if (pkt->duration == 0) {
982 compute_frame_duration(&num, &den, st, pc, pkt);
984 pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
986 if(pkt->duration != 0 && s->packet_buffer)
987 update_initial_durations(s, st, pkt);
991 /* correct timestamps with byte offset if demuxers only have timestamps
992 on packet boundaries */
993 if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
994 /* this will estimate bitrate based on this frame's duration and size */
995 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
996 if(pkt->pts != AV_NOPTS_VALUE)
998 if(pkt->dts != AV_NOPTS_VALUE)
1002 if (pc && pc->dts_sync_point >= 0) {
1003 // we have synchronization info from the parser
1004 int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num;
1006 int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den;
1007 if (pkt->dts != AV_NOPTS_VALUE) {
1008 // got DTS from the stream, update reference timestamp
1009 st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den;
1010 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1011 } else if (st->reference_dts != AV_NOPTS_VALUE) {
1012 // compute DTS based on reference timestamp
1013 pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den;
1014 pkt->pts = pkt->dts + pc->pts_dts_delta * num / den;
1016 if (pc->dts_sync_point > 0)
1017 st->reference_dts = pkt->dts; // new reference
1021 /* This may be redundant, but it should not hurt. */
1022 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
1023 presentation_delayed = 1;
1025 // 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);
1026 /* interpolate PTS and DTS if they are not present */
1027 //We skip H264 currently because delay and has_b_frames are not reliably set
1028 if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){
1029 if (presentation_delayed) {
1030 /* DTS = decompression timestamp */
1031 /* PTS = presentation timestamp */
1032 if (pkt->dts == AV_NOPTS_VALUE)
1033 pkt->dts = st->last_IP_pts;
1034 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
1035 if (pkt->dts == AV_NOPTS_VALUE)
1036 pkt->dts = st->cur_dts;
1038 /* this is tricky: the dts must be incremented by the duration
1039 of the frame we are displaying, i.e. the last I- or P-frame */
1040 if (st->last_IP_duration == 0)
1041 st->last_IP_duration = pkt->duration;
1042 if(pkt->dts != AV_NOPTS_VALUE)
1043 st->cur_dts = pkt->dts + st->last_IP_duration;
1044 st->last_IP_duration = pkt->duration;
1045 st->last_IP_pts= pkt->pts;
1046 /* cannot compute PTS if not present (we can compute it only
1047 by knowing the future */
1048 } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){
1049 if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){
1050 int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts);
1051 int64_t new_diff= FFABS(st->cur_dts - pkt->pts);
1052 if(old_diff < new_diff && old_diff < (pkt->duration>>3)){
1053 pkt->pts += pkt->duration;
1054 // 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);
1058 /* presentation is not delayed : PTS and DTS are the same */
1059 if(pkt->pts == AV_NOPTS_VALUE)
1060 pkt->pts = pkt->dts;
1061 update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts);
1062 if(pkt->pts == AV_NOPTS_VALUE)
1063 pkt->pts = st->cur_dts;
1064 pkt->dts = pkt->pts;
1065 if(pkt->pts != AV_NOPTS_VALUE)
1066 st->cur_dts = pkt->pts + pkt->duration;
1070 if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
1071 st->pts_buffer[0]= pkt->pts;
1072 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
1073 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
1074 if(pkt->dts == AV_NOPTS_VALUE)
1075 pkt->dts= st->pts_buffer[0];
1076 if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here
1077 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet
1079 if(pkt->dts > st->cur_dts)
1080 st->cur_dts = pkt->dts;
1083 // 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);
1086 if(is_intra_only(st->codec))
1087 pkt->flags |= AV_PKT_FLAG_KEY;
1090 /* keyframe computation */
1091 if (pc->key_frame == 1)
1092 pkt->flags |= AV_PKT_FLAG_KEY;
1093 else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I)
1094 pkt->flags |= AV_PKT_FLAG_KEY;
1097 pkt->convergence_duration = pc->convergence_duration;
1101 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1106 av_init_packet(pkt);
1109 /* select current input stream component */
1112 if (!st->need_parsing || !st->parser) {
1113 /* no parsing needed: we just output the packet as is */
1114 /* raw data support */
1115 *pkt = st->cur_pkt; st->cur_pkt.data= NULL;
1116 compute_pkt_fields(s, st, NULL, pkt);
1118 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1119 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1120 ff_reduce_index(s, st->index);
1121 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1124 } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) {
1125 len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size,
1126 st->cur_ptr, st->cur_len,
1127 st->cur_pkt.pts, st->cur_pkt.dts,
1129 st->cur_pkt.pts = AV_NOPTS_VALUE;
1130 st->cur_pkt.dts = AV_NOPTS_VALUE;
1131 /* increment read pointer */
1135 /* return packet if any */
1139 pkt->stream_index = st->index;
1140 pkt->pts = st->parser->pts;
1141 pkt->dts = st->parser->dts;
1142 pkt->pos = st->parser->pos;
1143 if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){
1145 pkt->destruct= st->cur_pkt.destruct;
1146 st->cur_pkt.destruct= NULL;
1147 st->cur_pkt.data = NULL;
1148 assert(st->cur_len == 0);
1150 pkt->destruct = NULL;
1152 compute_pkt_fields(s, st, st->parser, pkt);
1154 if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){
1155 ff_reduce_index(s, st->index);
1156 av_add_index_entry(st, st->parser->frame_offset, pkt->dts,
1157 0, 0, AVINDEX_KEYFRAME);
1164 av_free_packet(&st->cur_pkt);
1169 /* read next packet */
1170 ret = av_read_packet(s, &cur_pkt);
1172 if (ret == AVERROR(EAGAIN))
1174 /* return the last frames, if any */
1175 for(i = 0; i < s->nb_streams; i++) {
1177 if (st->parser && st->need_parsing) {
1178 av_parser_parse2(st->parser, st->codec,
1179 &pkt->data, &pkt->size,
1181 AV_NOPTS_VALUE, AV_NOPTS_VALUE,
1187 /* no more packets: really terminate parsing */
1190 st = s->streams[cur_pkt.stream_index];
1191 st->cur_pkt= cur_pkt;
1193 if(st->cur_pkt.pts != AV_NOPTS_VALUE &&
1194 st->cur_pkt.dts != AV_NOPTS_VALUE &&
1195 st->cur_pkt.pts < st->cur_pkt.dts){
1196 av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n",
1197 st->cur_pkt.stream_index,
1201 // av_free_packet(&st->cur_pkt);
1205 if(s->debug & FF_FDEBUG_TS)
1206 av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1207 st->cur_pkt.stream_index,
1211 st->cur_pkt.duration,
1215 st->cur_ptr = st->cur_pkt.data;
1216 st->cur_len = st->cur_pkt.size;
1217 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1218 st->parser = av_parser_init(st->codec->codec_id);
1220 /* no parser available: just output the raw packets */
1221 st->need_parsing = AVSTREAM_PARSE_NONE;
1222 }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){
1223 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1224 }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){
1225 st->parser->flags |= PARSER_FLAG_ONCE;
1230 if(s->debug & FF_FDEBUG_TS)
1231 av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n",
1242 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1246 const int genpts= s->flags & AVFMT_FLAG_GENPTS;
1249 pktl = s->packet_buffer;
1251 AVPacket *next_pkt= &pktl->pkt;
1253 if(genpts && next_pkt->dts != AV_NOPTS_VALUE){
1254 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1255 while(pktl && next_pkt->pts == AV_NOPTS_VALUE){
1256 if( pktl->pkt.stream_index == next_pkt->stream_index
1257 && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)))
1258 && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame
1259 next_pkt->pts= pktl->pkt.dts;
1263 pktl = s->packet_buffer;
1266 if( next_pkt->pts != AV_NOPTS_VALUE
1267 || next_pkt->dts == AV_NOPTS_VALUE
1269 /* read packet from packet buffer, if there is data */
1271 s->packet_buffer = pktl->next;
1277 int ret= read_frame_internal(s, pkt);
1279 if(pktl && ret != AVERROR(EAGAIN)){
1286 if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
1287 &s->packet_buffer_end)) < 0)
1288 return AVERROR(ENOMEM);
1290 assert(!s->packet_buffer);
1291 return read_frame_internal(s, pkt);
1296 /* XXX: suppress the packet queue */
1297 static void flush_packet_queue(AVFormatContext *s)
1302 pktl = s->packet_buffer;
1305 s->packet_buffer = pktl->next;
1306 av_free_packet(&pktl->pkt);
1309 while(s->raw_packet_buffer){
1310 pktl = s->raw_packet_buffer;
1311 s->raw_packet_buffer = pktl->next;
1312 av_free_packet(&pktl->pkt);
1315 s->packet_buffer_end=
1316 s->raw_packet_buffer_end= NULL;
1317 s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1320 /*******************************************************/
1323 int av_find_default_stream_index(AVFormatContext *s)
1325 int first_audio_index = -1;
1329 if (s->nb_streams <= 0)
1331 for(i = 0; i < s->nb_streams; i++) {
1333 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1336 if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1337 first_audio_index = i;
1339 return first_audio_index >= 0 ? first_audio_index : 0;
1343 * Flush the frame reader.
1345 void ff_read_frame_flush(AVFormatContext *s)
1350 flush_packet_queue(s);
1354 /* for each stream, reset read state */
1355 for(i = 0; i < s->nb_streams; i++) {
1359 av_parser_close(st->parser);
1361 av_free_packet(&st->cur_pkt);
1363 st->last_IP_pts = AV_NOPTS_VALUE;
1364 st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
1365 st->reference_dts = AV_NOPTS_VALUE;
1370 st->probe_packets = MAX_PROBE_PACKETS;
1372 for(j=0; j<MAX_REORDER_DELAY+1; j++)
1373 st->pts_buffer[j]= AV_NOPTS_VALUE;
1377 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){
1380 for(i = 0; i < s->nb_streams; i++) {
1381 AVStream *st = s->streams[i];
1383 st->cur_dts = av_rescale(timestamp,
1384 st->time_base.den * (int64_t)ref_st->time_base.num,
1385 st->time_base.num * (int64_t)ref_st->time_base.den);
1389 void ff_reduce_index(AVFormatContext *s, int stream_index)
1391 AVStream *st= s->streams[stream_index];
1392 unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry);
1394 if((unsigned)st->nb_index_entries >= max_entries){
1396 for(i=0; 2*i<st->nb_index_entries; i++)
1397 st->index_entries[i]= st->index_entries[2*i];
1398 st->nb_index_entries= i;
1402 int ff_add_index_entry(AVIndexEntry **index_entries,
1403 int *nb_index_entries,
1404 unsigned int *index_entries_allocated_size,
1405 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1407 AVIndexEntry *entries, *ie;
1410 if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1413 entries = av_fast_realloc(*index_entries,
1414 index_entries_allocated_size,
1415 (*nb_index_entries + 1) *
1416 sizeof(AVIndexEntry));
1420 *index_entries= entries;
1422 index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY);
1425 index= (*nb_index_entries)++;
1426 ie= &entries[index];
1427 assert(index==0 || ie[-1].timestamp < timestamp);
1429 ie= &entries[index];
1430 if(ie->timestamp != timestamp){
1431 if(ie->timestamp <= timestamp)
1433 memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index));
1434 (*nb_index_entries)++;
1435 }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance
1436 distance= ie->min_distance;
1440 ie->timestamp = timestamp;
1441 ie->min_distance= distance;
1448 int av_add_index_entry(AVStream *st,
1449 int64_t pos, int64_t timestamp, int size, int distance, int flags)
1451 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1452 &st->index_entries_allocated_size, pos,
1453 timestamp, size, distance, flags);
1456 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1457 int64_t wanted_timestamp, int flags)
1465 //optimize appending index entries at the end
1466 if(b && entries[b-1].timestamp < wanted_timestamp)
1471 timestamp = entries[m].timestamp;
1472 if(timestamp >= wanted_timestamp)
1474 if(timestamp <= wanted_timestamp)
1477 m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1479 if(!(flags & AVSEEK_FLAG_ANY)){
1480 while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){
1481 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1490 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
1493 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1494 wanted_timestamp, flags);
1497 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
1498 AVInputFormat *avif= s->iformat;
1499 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1500 int64_t ts_min, ts_max, ts;
1505 if (stream_index < 0)
1508 av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
1511 ts_min= AV_NOPTS_VALUE;
1512 pos_limit= -1; //gcc falsely says it may be uninitialized
1514 st= s->streams[stream_index];
1515 if(st->index_entries){
1518 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()
1519 index= FFMAX(index, 0);
1520 e= &st->index_entries[index];
1522 if(e->timestamp <= target_ts || e->pos == e->min_distance){
1524 ts_min= e->timestamp;
1525 av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
1531 index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD);
1532 assert(index < st->nb_index_entries);
1534 e= &st->index_entries[index];
1535 assert(e->timestamp >= target_ts);
1537 ts_max= e->timestamp;
1538 pos_limit= pos_max - e->min_distance;
1539 av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n",
1540 pos_max,pos_limit, ts_max);
1544 pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp);
1549 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1552 av_update_cur_dts(s, st, ts);
1557 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 )){
1559 int64_t start_pos, filesize;
1562 av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
1564 if(ts_min == AV_NOPTS_VALUE){
1565 pos_min = s->data_offset;
1566 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1567 if (ts_min == AV_NOPTS_VALUE)
1571 if(ts_max == AV_NOPTS_VALUE){
1573 filesize = avio_size(s->pb);
1574 pos_max = filesize - 1;
1577 ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step);
1579 }while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
1580 if (ts_max == AV_NOPTS_VALUE)
1584 int64_t tmp_pos= pos_max + 1;
1585 int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX);
1586 if(tmp_ts == AV_NOPTS_VALUE)
1590 if(tmp_pos >= filesize)
1596 if(ts_min > ts_max){
1598 }else if(ts_min == ts_max){
1603 while (pos_min < pos_limit) {
1604 av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n",
1605 pos_min, pos_max, ts_min, ts_max);
1606 assert(pos_limit <= pos_max);
1609 int64_t approximate_keyframe_distance= pos_max - pos_limit;
1610 // interpolate position (better than dichotomy)
1611 pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min)
1612 + pos_min - approximate_keyframe_distance;
1613 }else if(no_change==1){
1614 // bisection, if interpolation failed to change min or max pos last time
1615 pos = (pos_min + pos_limit)>>1;
1617 /* linear search if bisection failed, can only happen if there
1618 are very few or no keyframes between min/max */
1623 else if(pos > pos_limit)
1627 ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1
1632 av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
1633 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
1634 pos_limit, start_pos, no_change);
1635 if(ts == AV_NOPTS_VALUE){
1636 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
1639 assert(ts != AV_NOPTS_VALUE);
1640 if (target_ts <= ts) {
1641 pos_limit = start_pos - 1;
1645 if (target_ts >= ts) {
1651 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
1652 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
1654 ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1656 ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
1657 av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
1658 pos, ts_min, target_ts, ts_max);
1663 static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){
1664 int64_t pos_min, pos_max;
1668 if (stream_index < 0)
1671 st= s->streams[stream_index];
1674 pos_min = s->data_offset;
1675 pos_max = avio_size(s->pb) - 1;
1677 if (pos < pos_min) pos= pos_min;
1678 else if(pos > pos_max) pos= pos_max;
1680 avio_seek(s->pb, pos, SEEK_SET);
1683 av_update_cur_dts(s, st, ts);
1688 static int seek_frame_generic(AVFormatContext *s,
1689 int stream_index, int64_t timestamp, int flags)
1696 st = s->streams[stream_index];
1698 index = av_index_search_timestamp(st, timestamp, flags);
1700 if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
1703 if(index < 0 || index==st->nb_index_entries-1){
1706 if(st->nb_index_entries){
1707 assert(st->index_entries);
1708 ie= &st->index_entries[st->nb_index_entries-1];
1709 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1711 av_update_cur_dts(s, st, ie->timestamp);
1713 if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
1719 read_status = av_read_frame(s, &pkt);
1720 } while (read_status == AVERROR(EAGAIN));
1721 if (read_status < 0)
1723 av_free_packet(&pkt);
1724 if(stream_index == pkt.stream_index){
1725 if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
1729 index = av_index_search_timestamp(st, timestamp, flags);
1734 ff_read_frame_flush(s);
1735 if (s->iformat->read_seek){
1736 if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
1739 ie = &st->index_entries[index];
1740 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
1742 av_update_cur_dts(s, st, ie->timestamp);
1747 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1752 if (flags & AVSEEK_FLAG_BYTE) {
1753 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
1755 ff_read_frame_flush(s);
1756 return seek_frame_byte(s, stream_index, timestamp, flags);
1759 if(stream_index < 0){
1760 stream_index= av_find_default_stream_index(s);
1761 if(stream_index < 0)
1764 st= s->streams[stream_index];
1765 /* timestamp for default must be expressed in AV_TIME_BASE units */
1766 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1769 /* first, we try the format specific seek */
1770 if (s->iformat->read_seek) {
1771 ff_read_frame_flush(s);
1772 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1779 if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
1780 ff_read_frame_flush(s);
1781 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1782 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
1783 ff_read_frame_flush(s);
1784 return seek_frame_generic(s, stream_index, timestamp, flags);
1790 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1792 if(min_ts > ts || max_ts < ts)
1795 if (s->iformat->read_seek2) {
1796 ff_read_frame_flush(s);
1797 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1800 if(s->iformat->read_timestamp){
1801 //try to seek via read_timestamp()
1804 //Fallback to old API if new is not implemented but old is
1805 //Note the old has somewat different sematics
1806 if(s->iformat->read_seek || 1)
1807 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1809 // try some generic seek like seek_frame_generic() but with new ts semantics
1812 /*******************************************************/
1815 * Return TRUE if the stream has accurate duration in any stream.
1817 * @return TRUE if the stream has accurate duration for at least one component.
1819 static int has_duration(AVFormatContext *ic)
1824 for(i = 0;i < ic->nb_streams; i++) {
1825 st = ic->streams[i];
1826 if (st->duration != AV_NOPTS_VALUE)
1833 * Estimate the stream timings from the one of each components.
1835 * Also computes the global bitrate if possible.
1837 static void update_stream_timings(AVFormatContext *ic)
1839 int64_t start_time, start_time1, end_time, end_time1;
1840 int64_t duration, duration1;
1844 start_time = INT64_MAX;
1845 end_time = INT64_MIN;
1846 duration = INT64_MIN;
1847 for(i = 0;i < ic->nb_streams; i++) {
1848 st = ic->streams[i];
1849 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1850 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1851 if (start_time1 < start_time)
1852 start_time = start_time1;
1853 if (st->duration != AV_NOPTS_VALUE) {
1854 end_time1 = start_time1
1855 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1856 if (end_time1 > end_time)
1857 end_time = end_time1;
1860 if (st->duration != AV_NOPTS_VALUE) {
1861 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1862 if (duration1 > duration)
1863 duration = duration1;
1866 if (start_time != INT64_MAX) {
1867 ic->start_time = start_time;
1868 if (end_time != INT64_MIN) {
1869 if (end_time - start_time > duration)
1870 duration = end_time - start_time;
1873 if (duration != INT64_MIN) {
1874 ic->duration = duration;
1875 if (ic->file_size > 0) {
1876 /* compute the bitrate */
1877 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1878 (double)ic->duration;
1883 static void fill_all_stream_timings(AVFormatContext *ic)
1888 update_stream_timings(ic);
1889 for(i = 0;i < ic->nb_streams; i++) {
1890 st = ic->streams[i];
1891 if (st->start_time == AV_NOPTS_VALUE) {
1892 if(ic->start_time != AV_NOPTS_VALUE)
1893 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1894 if(ic->duration != AV_NOPTS_VALUE)
1895 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1900 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1902 int64_t filesize, duration;
1906 /* if bit_rate is already set, we believe it */
1907 if (ic->bit_rate <= 0) {
1909 for(i=0;i<ic->nb_streams;i++) {
1910 st = ic->streams[i];
1911 if (st->codec->bit_rate > 0)
1912 bit_rate += st->codec->bit_rate;
1914 ic->bit_rate = bit_rate;
1917 /* if duration is already set, we believe it */
1918 if (ic->duration == AV_NOPTS_VALUE &&
1919 ic->bit_rate != 0 &&
1920 ic->file_size != 0) {
1921 filesize = ic->file_size;
1923 for(i = 0; i < ic->nb_streams; i++) {
1924 st = ic->streams[i];
1925 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1926 if (st->duration == AV_NOPTS_VALUE)
1927 st->duration = duration;
1933 #define DURATION_MAX_READ_SIZE 250000
1934 #define DURATION_MAX_RETRY 3
1936 /* only usable for MPEG-PS streams */
1937 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1939 AVPacket pkt1, *pkt = &pkt1;
1941 int read_size, i, ret;
1943 int64_t filesize, offset, duration;
1948 /* flush packet queue */
1949 flush_packet_queue(ic);
1951 for (i=0; i<ic->nb_streams; i++) {
1952 st = ic->streams[i];
1953 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1954 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1957 av_parser_close(st->parser);
1959 av_free_packet(&st->cur_pkt);
1963 /* estimate the end time (duration) */
1964 /* XXX: may need to support wrapping */
1965 filesize = ic->file_size;
1966 end_time = AV_NOPTS_VALUE;
1968 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1972 avio_seek(ic->pb, offset, SEEK_SET);
1975 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1979 ret = av_read_packet(ic, pkt);
1980 } while(ret == AVERROR(EAGAIN));
1983 read_size += pkt->size;
1984 st = ic->streams[pkt->stream_index];
1985 if (pkt->pts != AV_NOPTS_VALUE &&
1986 (st->start_time != AV_NOPTS_VALUE ||
1987 st->first_dts != AV_NOPTS_VALUE)) {
1988 duration = end_time = pkt->pts;
1989 if (st->start_time != AV_NOPTS_VALUE)
1990 duration -= st->start_time;
1992 duration -= st->first_dts;
1994 duration += 1LL<<st->pts_wrap_bits;
1996 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1997 st->duration = duration;
2000 av_free_packet(pkt);
2002 }while( end_time==AV_NOPTS_VALUE
2003 && filesize > (DURATION_MAX_READ_SIZE<<retry)
2004 && ++retry <= DURATION_MAX_RETRY);
2006 fill_all_stream_timings(ic);
2008 avio_seek(ic->pb, old_offset, SEEK_SET);
2009 for (i=0; i<ic->nb_streams; i++) {
2011 st->cur_dts= st->first_dts;
2012 st->last_IP_pts = AV_NOPTS_VALUE;
2013 st->reference_dts = AV_NOPTS_VALUE;
2017 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2021 /* get the file size, if possible */
2022 if (ic->iformat->flags & AVFMT_NOFILE) {
2025 file_size = avio_size(ic->pb);
2029 ic->file_size = file_size;
2031 if ((!strcmp(ic->iformat->name, "mpeg") ||
2032 !strcmp(ic->iformat->name, "mpegts")) &&
2033 file_size && ic->pb->seekable) {
2034 /* get accurate estimate from the PTSes */
2035 estimate_timings_from_pts(ic, old_offset);
2036 } else if (has_duration(ic)) {
2037 /* at least one component has timings - we use them for all
2039 fill_all_stream_timings(ic);
2041 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2042 /* less precise: use bitrate info */
2043 estimate_timings_from_bit_rate(ic);
2045 update_stream_timings(ic);
2049 AVStream av_unused *st;
2050 for(i = 0;i < ic->nb_streams; i++) {
2051 st = ic->streams[i];
2052 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2053 (double) st->start_time / AV_TIME_BASE,
2054 (double) st->duration / AV_TIME_BASE);
2056 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2057 (double) ic->start_time / AV_TIME_BASE,
2058 (double) ic->duration / AV_TIME_BASE,
2059 ic->bit_rate / 1000);
2063 static int has_codec_parameters(AVCodecContext *avctx)
2066 switch (avctx->codec_type) {
2067 case AVMEDIA_TYPE_AUDIO:
2068 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
2069 if (!avctx->frame_size &&
2070 (avctx->codec_id == CODEC_ID_VORBIS ||
2071 avctx->codec_id == CODEC_ID_AAC ||
2072 avctx->codec_id == CODEC_ID_MP1 ||
2073 avctx->codec_id == CODEC_ID_MP2 ||
2074 avctx->codec_id == CODEC_ID_MP3 ||
2075 avctx->codec_id == CODEC_ID_SPEEX ||
2076 avctx->codec_id == CODEC_ID_CELT))
2079 case AVMEDIA_TYPE_VIDEO:
2080 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2086 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2089 static int has_decode_delay_been_guessed(AVStream *st)
2091 return st->codec->codec_id != CODEC_ID_H264 ||
2092 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2095 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2099 int got_picture, data_size, ret=0;
2102 if(!st->codec->codec){
2103 codec = avcodec_find_decoder(st->codec->codec_id);
2106 ret = avcodec_open2(st->codec, codec, options);
2111 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st) ||
2112 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF)) {
2113 switch(st->codec->codec_type) {
2114 case AVMEDIA_TYPE_VIDEO:
2115 avcodec_get_frame_defaults(&picture);
2116 ret = avcodec_decode_video2(st->codec, &picture,
2117 &got_picture, avpkt);
2119 case AVMEDIA_TYPE_AUDIO:
2120 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2121 samples = av_malloc(data_size);
2124 ret = avcodec_decode_audio3(st->codec, samples,
2136 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2138 while (tags->id != CODEC_ID_NONE) {
2146 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2149 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2150 if(tag == tags[i].tag)
2153 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2154 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2157 return CODEC_ID_NONE;
2160 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2163 for(i=0; tags && tags[i]; i++){
2164 int tag= ff_codec_get_tag(tags[i], id);
2170 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2173 for(i=0; tags && tags[i]; i++){
2174 enum CodecID id= ff_codec_get_id(tags[i], tag);
2175 if(id!=CODEC_ID_NONE) return id;
2177 return CODEC_ID_NONE;
2180 static void compute_chapters_end(AVFormatContext *s)
2183 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2185 for (i = 0; i < s->nb_chapters; i++)
2186 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2187 AVChapter *ch = s->chapters[i];
2188 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2191 for (j = 0; j < s->nb_chapters; j++) {
2192 AVChapter *ch1 = s->chapters[j];
2193 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2194 if (j != i && next_start > ch->start && next_start < end)
2197 ch->end = (end == INT64_MAX) ? ch->start : end;
2201 static int get_std_framerate(int i){
2202 if(i<60*12) return i*1001;
2203 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2207 * Is the time base unreliable.
2208 * This is a heuristic to balance between quick acceptance of the values in
2209 * the headers vs. some extra checks.
2210 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2211 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2212 * And there are "variable" fps files this needs to detect as well.
2214 static int tb_unreliable(AVCodecContext *c){
2215 if( c->time_base.den >= 101L*c->time_base.num
2216 || c->time_base.den < 5L*c->time_base.num
2217 /* || c->codec_tag == AV_RL32("DIVX")
2218 || c->codec_tag == AV_RL32("XVID")*/
2219 || c->codec_id == CODEC_ID_MPEG2VIDEO
2220 || c->codec_id == CODEC_ID_H264
2226 #if FF_API_FORMAT_PARAMETERS
2227 int av_find_stream_info(AVFormatContext *ic)
2229 return avformat_find_stream_info(ic, NULL);
2233 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2235 int i, count, ret, read_size, j;
2237 AVPacket pkt1, *pkt;
2238 int64_t old_offset = avio_tell(ic->pb);
2239 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2241 for(i=0;i<ic->nb_streams;i++) {
2243 st = ic->streams[i];
2245 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2246 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2247 /* if(!st->time_base.num)
2249 if(!st->codec->time_base.num)
2250 st->codec->time_base= st->time_base;
2252 //only for the split stuff
2253 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2254 st->parser = av_parser_init(st->codec->codec_id);
2255 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2256 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2259 assert(!st->codec->codec);
2260 codec = avcodec_find_decoder(st->codec->codec_id);
2262 /* Ensure that subtitle_header is properly set. */
2263 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2264 && codec && !st->codec->codec)
2265 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2267 //try to just open decoders, in case this is enough to get parameters
2268 if(!has_codec_parameters(st->codec)){
2269 if (codec && !st->codec->codec)
2270 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2274 for (i=0; i<ic->nb_streams; i++) {
2275 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2281 if(url_interrupt_cb()){
2283 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2287 /* check if one codec still needs to be handled */
2288 for(i=0;i<ic->nb_streams;i++) {
2289 int fps_analyze_framecount = 20;
2291 st = ic->streams[i];
2292 if (!has_codec_parameters(st->codec))
2294 /* if the timebase is coarse (like the usual millisecond precision
2295 of mkv), we need to analyze more frames to reliably arrive at
2297 if (av_q2d(st->time_base) > 0.0005)
2298 fps_analyze_framecount *= 2;
2299 if (ic->fps_probe_size >= 0)
2300 fps_analyze_framecount = ic->fps_probe_size;
2301 /* variable fps and no guess at the real fps */
2302 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2303 && st->info->duration_count < fps_analyze_framecount
2304 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2306 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2308 if(st->first_dts == AV_NOPTS_VALUE)
2311 if (i == ic->nb_streams) {
2312 /* NOTE: if the format has no header, then we need to read
2313 some packets to get most of the streams, so we cannot
2315 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2316 /* if we found the info for all the codecs, we can stop */
2318 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2322 /* we did not get all the codec info, but we read too much data */
2323 if (read_size >= ic->probesize) {
2325 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2329 /* NOTE: a new stream can be added there if no header in file
2330 (AVFMTCTX_NOHEADER) */
2331 ret = read_frame_internal(ic, &pkt1);
2332 if (ret == AVERROR(EAGAIN))
2337 ret = -1; /* we could not have all the codec parameters before EOF */
2338 for(i=0;i<ic->nb_streams;i++) {
2339 st = ic->streams[i];
2340 if (!has_codec_parameters(st->codec)){
2342 avcodec_string(buf, sizeof(buf), st->codec, 0);
2343 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2351 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2352 if ((ret = av_dup_packet(pkt)) < 0)
2353 goto find_stream_info_err;
2355 read_size += pkt->size;
2357 st = ic->streams[pkt->stream_index];
2358 if (st->codec_info_nb_frames>1) {
2359 if (st->time_base.den > 0 && av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
2360 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2363 st->info->codec_info_duration += pkt->duration;
2366 int64_t last = st->info->last_dts;
2368 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
2369 int64_t duration= pkt->dts - last;
2370 double dur= duration * av_q2d(st->time_base);
2372 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2373 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2374 if (st->info->duration_count < 2)
2375 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2376 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2377 int framerate= get_std_framerate(i);
2378 int ticks= lrintf(dur*framerate/(1001*12));
2379 double error= dur - ticks*1001*12/(double)framerate;
2380 st->info->duration_error[i] += error*error;
2382 st->info->duration_count++;
2383 // ignore the first 4 values, they might have some random jitter
2384 if (st->info->duration_count > 3)
2385 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2387 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2388 st->info->last_dts = pkt->dts;
2390 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2391 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2393 st->codec->extradata_size= i;
2394 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2395 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2396 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2400 /* if still no information, we try to open the codec and to
2401 decompress the frame. We try to avoid that in most cases as
2402 it takes longer and uses more memory. For MPEG-4, we need to
2403 decompress for QuickTime.
2405 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2406 least one frame of codec data, this makes sure the codec initializes
2407 the channel configuration and does not only trust the values from the container.
2409 try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL);
2411 st->codec_info_nb_frames++;
2415 // close codecs which were opened in try_decode_frame()
2416 for(i=0;i<ic->nb_streams;i++) {
2417 st = ic->streams[i];
2418 if(st->codec->codec)
2419 avcodec_close(st->codec);
2421 for(i=0;i<ic->nb_streams;i++) {
2422 st = ic->streams[i];
2423 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2424 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2425 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2426 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2427 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2428 // the check for tb_unreliable() is not completely correct, since this is not about handling
2429 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2430 // ipmovie.c produces.
2431 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2432 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX);
2433 if (st->info->duration_count && !st->r_frame_rate.num
2434 && tb_unreliable(st->codec) /*&&
2435 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2436 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2438 double best_error= 2*av_q2d(st->time_base);
2439 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2441 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2442 double error = st->info->duration_error[j] * get_std_framerate(j);
2443 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2444 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2445 if(error < best_error){
2447 num = get_std_framerate(j);
2450 // do not increase frame rate by more than 1 % in order to match a standard rate.
2451 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2452 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2455 if (!st->r_frame_rate.num){
2456 if( st->codec->time_base.den * (int64_t)st->time_base.num
2457 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2458 st->r_frame_rate.num = st->codec->time_base.den;
2459 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2461 st->r_frame_rate.num = st->time_base.den;
2462 st->r_frame_rate.den = st->time_base.num;
2465 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2466 if(!st->codec->bits_per_coded_sample)
2467 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2468 // set stream disposition based on audio service type
2469 switch (st->codec->audio_service_type) {
2470 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2471 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2472 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2473 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2474 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2475 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2476 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2477 st->disposition = AV_DISPOSITION_COMMENT; break;
2478 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2479 st->disposition = AV_DISPOSITION_KARAOKE; break;
2484 estimate_timings(ic, old_offset);
2486 compute_chapters_end(ic);
2489 /* correct DTS for B-frame streams with no timestamps */
2490 for(i=0;i<ic->nb_streams;i++) {
2491 st = ic->streams[i];
2492 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2494 ppktl = &ic->packet_buffer;
2496 if(ppkt1->stream_index != i)
2498 if(ppkt1->pkt->dts < 0)
2500 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2502 ppkt1->pkt->dts -= delta;
2507 st->cur_dts -= delta;
2513 find_stream_info_err:
2514 for (i=0; i < ic->nb_streams; i++)
2515 av_freep(&ic->streams[i]->info);
2519 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2523 for (i = 0; i < ic->nb_programs; i++)
2524 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2525 if (ic->programs[i]->stream_index[j] == s)
2526 return ic->programs[i];
2530 int av_find_best_stream(AVFormatContext *ic,
2531 enum AVMediaType type,
2532 int wanted_stream_nb,
2534 AVCodec **decoder_ret,
2537 int i, nb_streams = ic->nb_streams;
2538 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2539 unsigned *program = NULL;
2540 AVCodec *decoder = NULL, *best_decoder = NULL;
2542 if (related_stream >= 0 && wanted_stream_nb < 0) {
2543 AVProgram *p = find_program_from_stream(ic, related_stream);
2545 program = p->stream_index;
2546 nb_streams = p->nb_stream_indexes;
2549 for (i = 0; i < nb_streams; i++) {
2550 int real_stream_index = program ? program[i] : i;
2551 AVStream *st = ic->streams[real_stream_index];
2552 AVCodecContext *avctx = st->codec;
2553 if (avctx->codec_type != type)
2555 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2557 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2560 decoder = avcodec_find_decoder(st->codec->codec_id);
2563 ret = AVERROR_DECODER_NOT_FOUND;
2567 if (best_count >= st->codec_info_nb_frames)
2569 best_count = st->codec_info_nb_frames;
2570 ret = real_stream_index;
2571 best_decoder = decoder;
2572 if (program && i == nb_streams - 1 && ret < 0) {
2574 nb_streams = ic->nb_streams;
2575 i = 0; /* no related stream found, try again with everything */
2579 *decoder_ret = best_decoder;
2583 /*******************************************************/
2585 int av_read_play(AVFormatContext *s)
2587 if (s->iformat->read_play)
2588 return s->iformat->read_play(s);
2590 return avio_pause(s->pb, 0);
2591 return AVERROR(ENOSYS);
2594 int av_read_pause(AVFormatContext *s)
2596 if (s->iformat->read_pause)
2597 return s->iformat->read_pause(s);
2599 return avio_pause(s->pb, 1);
2600 return AVERROR(ENOSYS);
2603 void av_close_input_stream(AVFormatContext *s)
2605 flush_packet_queue(s);
2606 if (s->iformat->read_close)
2607 s->iformat->read_close(s);
2608 avformat_free_context(s);
2611 void avformat_free_context(AVFormatContext *s)
2617 if (s->iformat && s->iformat->priv_class && s->priv_data)
2618 av_opt_free(s->priv_data);
2620 for(i=0;i<s->nb_streams;i++) {
2621 /* free all data in a stream component */
2624 av_parser_close(st->parser);
2625 av_free_packet(&st->cur_pkt);
2627 av_dict_free(&st->metadata);
2628 av_free(st->index_entries);
2629 av_free(st->codec->extradata);
2630 av_free(st->codec->subtitle_header);
2632 av_free(st->priv_data);
2636 for(i=s->nb_programs-1; i>=0; i--) {
2637 av_dict_free(&s->programs[i]->metadata);
2638 av_freep(&s->programs[i]->stream_index);
2639 av_freep(&s->programs[i]);
2641 av_freep(&s->programs);
2642 av_freep(&s->priv_data);
2643 while(s->nb_chapters--) {
2644 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2645 av_free(s->chapters[s->nb_chapters]);
2647 av_freep(&s->chapters);
2648 av_dict_free(&s->metadata);
2649 av_freep(&s->streams);
2653 void av_close_input_file(AVFormatContext *s)
2655 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2657 av_close_input_stream(s);
2662 AVStream *av_new_stream(AVFormatContext *s, int id)
2668 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2670 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2673 s->streams = streams;
2675 st = av_mallocz(sizeof(AVStream));
2678 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2683 st->codec = avcodec_alloc_context3(NULL);
2685 /* no default bitrate if decoding */
2686 st->codec->bit_rate = 0;
2688 st->index = s->nb_streams;
2690 st->start_time = AV_NOPTS_VALUE;
2691 st->duration = AV_NOPTS_VALUE;
2692 /* we set the current DTS to 0 so that formats without any timestamps
2693 but durations get some timestamps, formats with some unknown
2694 timestamps have their first few packets buffered and the
2695 timestamps corrected before they are returned to the user */
2697 st->first_dts = AV_NOPTS_VALUE;
2698 st->probe_packets = MAX_PROBE_PACKETS;
2700 /* default pts setting is MPEG-like */
2701 av_set_pts_info(st, 33, 1, 90000);
2702 st->last_IP_pts = AV_NOPTS_VALUE;
2703 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2704 st->pts_buffer[i]= AV_NOPTS_VALUE;
2705 st->reference_dts = AV_NOPTS_VALUE;
2707 st->sample_aspect_ratio = (AVRational){0,1};
2709 s->streams[s->nb_streams++] = st;
2713 AVProgram *av_new_program(AVFormatContext *ac, int id)
2715 AVProgram *program=NULL;
2718 av_dlog(ac, "new_program: id=0x%04x\n", id);
2720 for(i=0; i<ac->nb_programs; i++)
2721 if(ac->programs[i]->id == id)
2722 program = ac->programs[i];
2725 program = av_mallocz(sizeof(AVProgram));
2728 dynarray_add(&ac->programs, &ac->nb_programs, program);
2729 program->discard = AVDISCARD_NONE;
2736 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2738 AVChapter *chapter = NULL;
2741 for(i=0; i<s->nb_chapters; i++)
2742 if(s->chapters[i]->id == id)
2743 chapter = s->chapters[i];
2746 chapter= av_mallocz(sizeof(AVChapter));
2749 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2751 av_dict_set(&chapter->metadata, "title", title, 0);
2753 chapter->time_base= time_base;
2754 chapter->start = start;
2760 /************************************************************/
2761 /* output media file */
2763 #if FF_API_FORMAT_PARAMETERS
2764 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2768 if (s->oformat->priv_data_size > 0) {
2769 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2771 return AVERROR(ENOMEM);
2772 if (s->oformat->priv_class) {
2773 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2774 av_opt_set_defaults(s->priv_data);
2777 s->priv_data = NULL;
2779 if (s->oformat->set_parameters) {
2780 ret = s->oformat->set_parameters(s, ap);
2788 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2790 const AVCodecTag *avctag;
2792 enum CodecID id = CODEC_ID_NONE;
2793 unsigned int tag = 0;
2796 * Check that tag + id is in the table
2797 * If neither is in the table -> OK
2798 * If tag is in the table with another id -> FAIL
2799 * If id is in the table with another tag -> FAIL unless strict < normal
2801 for (n = 0; s->oformat->codec_tag[n]; n++) {
2802 avctag = s->oformat->codec_tag[n];
2803 while (avctag->id != CODEC_ID_NONE) {
2804 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2806 if (id == st->codec->codec_id)
2809 if (avctag->id == st->codec->codec_id)
2814 if (id != CODEC_ID_NONE)
2816 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2821 #if FF_API_FORMAT_PARAMETERS
2822 int av_write_header(AVFormatContext *s)
2824 return avformat_write_header(s, NULL);
2828 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2832 AVDictionary *tmp = NULL;
2835 av_dict_copy(&tmp, *options, 0);
2836 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2839 // some sanity checks
2840 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2841 av_log(s, AV_LOG_ERROR, "no streams\n");
2842 ret = AVERROR(EINVAL);
2846 for(i=0;i<s->nb_streams;i++) {
2849 switch (st->codec->codec_type) {
2850 case AVMEDIA_TYPE_AUDIO:
2851 if(st->codec->sample_rate<=0){
2852 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2853 ret = AVERROR(EINVAL);
2856 if(!st->codec->block_align)
2857 st->codec->block_align = st->codec->channels *
2858 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2860 case AVMEDIA_TYPE_VIDEO:
2861 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2862 av_log(s, AV_LOG_ERROR, "time base not set\n");
2863 ret = AVERROR(EINVAL);
2866 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2867 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2868 ret = AVERROR(EINVAL);
2871 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2872 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2873 ret = AVERROR(EINVAL);
2879 if(s->oformat->codec_tag){
2880 if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){
2881 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2882 st->codec->codec_tag= 0;
2884 if(st->codec->codec_tag){
2885 if (!validate_codec_tag(s, st)) {
2887 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2888 av_log(s, AV_LOG_ERROR,
2889 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2890 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2891 ret = AVERROR_INVALIDDATA;
2895 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2898 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2899 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2900 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2903 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2904 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2905 if (!s->priv_data) {
2906 ret = AVERROR(ENOMEM);
2909 if (s->oformat->priv_class) {
2910 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2911 av_opt_set_defaults(s->priv_data);
2912 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2917 /* set muxer identification string */
2918 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2919 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2922 if(s->oformat->write_header){
2923 ret = s->oformat->write_header(s);
2928 /* init PTS generation */
2929 for(i=0;i<s->nb_streams;i++) {
2930 int64_t den = AV_NOPTS_VALUE;
2933 switch (st->codec->codec_type) {
2934 case AVMEDIA_TYPE_AUDIO:
2935 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2937 case AVMEDIA_TYPE_VIDEO:
2938 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2943 if (den != AV_NOPTS_VALUE) {
2945 ret = AVERROR_INVALIDDATA;
2948 frac_init(&st->pts, 0, 0, den);
2953 av_dict_free(options);
2962 //FIXME merge with compute_pkt_fields
2963 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2964 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2965 int num, den, frame_size, i;
2967 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2968 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2970 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2971 return AVERROR(EINVAL);*/
2973 /* duration field */
2974 if (pkt->duration == 0) {
2975 compute_frame_duration(&num, &den, st, NULL, pkt);
2977 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2981 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2984 //XXX/FIXME this is a temporary hack until all encoders output pts
2985 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2987 // pkt->pts= st->cur_dts;
2988 pkt->pts= st->pts.val;
2991 //calculate dts from pts
2992 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2993 st->pts_buffer[0]= pkt->pts;
2994 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2995 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2996 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2997 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2999 pkt->dts= st->pts_buffer[0];
3002 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
3003 av_log(s, AV_LOG_ERROR,
3004 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
3005 st->index, st->cur_dts, pkt->dts);
3006 return AVERROR(EINVAL);
3008 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3009 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3010 return AVERROR(EINVAL);
3013 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3014 st->cur_dts= pkt->dts;
3015 st->pts.val= pkt->dts;
3018 switch (st->codec->codec_type) {
3019 case AVMEDIA_TYPE_AUDIO:
3020 frame_size = get_audio_frame_size(st->codec, pkt->size);
3022 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3023 likely equal to the encoder delay, but it would be better if we
3024 had the real timestamps from the encoder */
3025 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3026 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3029 case AVMEDIA_TYPE_VIDEO:
3030 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3038 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3040 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3042 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3045 ret= s->oformat->write_packet(s, pkt);
3048 s->streams[pkt->stream_index]->nb_frames++;
3052 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3053 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3055 AVPacketList **next_point, *this_pktl;
3057 this_pktl = av_mallocz(sizeof(AVPacketList));
3058 this_pktl->pkt= *pkt;
3059 pkt->destruct= NULL; // do not free original but only the copy
3060 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3062 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3063 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3065 next_point = &s->packet_buffer;
3068 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3069 while(!compare(s, &(*next_point)->pkt, pkt)){
3070 next_point= &(*next_point)->next;
3074 next_point = &(s->packet_buffer_end->next);
3077 assert(!*next_point);
3079 s->packet_buffer_end= this_pktl;
3082 this_pktl->next= *next_point;
3084 s->streams[pkt->stream_index]->last_in_packet_buffer=
3085 *next_point= this_pktl;
3088 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3090 AVStream *st = s->streams[ pkt ->stream_index];
3091 AVStream *st2= s->streams[ next->stream_index];
3092 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3096 return pkt->stream_index < next->stream_index;
3100 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3106 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3109 for(i=0; i < s->nb_streams; i++)
3110 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3112 if(stream_count && (s->nb_streams == stream_count || flush)){
3113 pktl= s->packet_buffer;
3116 s->packet_buffer= pktl->next;
3117 if(!s->packet_buffer)
3118 s->packet_buffer_end= NULL;
3120 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3121 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3125 av_init_packet(out);
3131 * Interleave an AVPacket correctly so it can be muxed.
3132 * @param out the interleaved packet will be output here
3133 * @param in the input packet
3134 * @param flush 1 if no further packets are available as input and all
3135 * remaining packets should be output
3136 * @return 1 if a packet was output, 0 if no packet could be output,
3137 * < 0 if an error occurred
3139 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3140 if(s->oformat->interleave_packet)
3141 return s->oformat->interleave_packet(s, out, in, flush);
3143 return av_interleave_packet_per_dts(s, out, in, flush);
3146 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3147 AVStream *st= s->streams[ pkt->stream_index];
3150 //FIXME/XXX/HACK drop zero sized packets
3151 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3154 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3155 pkt->size, pkt->dts, pkt->pts);
3156 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3159 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3160 return AVERROR(EINVAL);
3164 int ret= interleave_packet(s, &opkt, pkt, 0);
3165 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3168 ret= s->oformat->write_packet(s, &opkt);
3170 s->streams[opkt.stream_index]->nb_frames++;
3172 av_free_packet(&opkt);
3180 int av_write_trailer(AVFormatContext *s)
3186 ret= interleave_packet(s, &pkt, NULL, 1);
3187 if(ret<0) //FIXME cleanup needed for ret<0 ?
3192 ret= s->oformat->write_packet(s, &pkt);
3194 s->streams[pkt.stream_index]->nb_frames++;
3196 av_free_packet(&pkt);
3202 if(s->oformat->write_trailer)
3203 ret = s->oformat->write_trailer(s);
3205 for(i=0;i<s->nb_streams;i++) {
3206 av_freep(&s->streams[i]->priv_data);
3207 av_freep(&s->streams[i]->index_entries);
3209 if (s->iformat && s->iformat->priv_class)
3210 av_opt_free(s->priv_data);
3211 av_freep(&s->priv_data);
3215 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3218 AVProgram *program=NULL;
3221 if (idx >= ac->nb_streams) {
3222 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3226 for(i=0; i<ac->nb_programs; i++){
3227 if(ac->programs[i]->id != progid)
3229 program = ac->programs[i];
3230 for(j=0; j<program->nb_stream_indexes; j++)
3231 if(program->stream_index[j] == idx)
3234 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3237 program->stream_index = tmp;
3238 program->stream_index[program->nb_stream_indexes++] = idx;
3243 static void print_fps(double d, const char *postfix){
3244 uint64_t v= lrintf(d*100);
3245 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3246 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3247 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3250 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3252 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3253 AVDictionaryEntry *tag=NULL;
3255 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3256 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3257 if(strcmp("language", tag->key))
3258 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3263 /* "user interface" functions */
3264 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3267 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3268 AVStream *st = ic->streams[i];
3269 int g = av_gcd(st->time_base.num, st->time_base.den);
3270 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3271 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3272 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3273 /* the pid is an important information, so we display it */
3274 /* XXX: add a generic system */
3275 if (flags & AVFMT_SHOW_IDS)
3276 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3278 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3279 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3280 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3281 if (st->sample_aspect_ratio.num && // default
3282 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3283 AVRational display_aspect_ratio;
3284 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3285 st->codec->width*st->sample_aspect_ratio.num,
3286 st->codec->height*st->sample_aspect_ratio.den,
3288 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3289 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3290 display_aspect_ratio.num, display_aspect_ratio.den);
3292 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3293 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3294 print_fps(av_q2d(st->avg_frame_rate), "fps");
3295 if(st->r_frame_rate.den && st->r_frame_rate.num)
3296 print_fps(av_q2d(st->r_frame_rate), "tbr");
3297 if(st->time_base.den && st->time_base.num)
3298 print_fps(1/av_q2d(st->time_base), "tbn");
3299 if(st->codec->time_base.den && st->codec->time_base.num)
3300 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3302 if (st->disposition & AV_DISPOSITION_DEFAULT)
3303 av_log(NULL, AV_LOG_INFO, " (default)");
3304 if (st->disposition & AV_DISPOSITION_DUB)
3305 av_log(NULL, AV_LOG_INFO, " (dub)");
3306 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3307 av_log(NULL, AV_LOG_INFO, " (original)");
3308 if (st->disposition & AV_DISPOSITION_COMMENT)
3309 av_log(NULL, AV_LOG_INFO, " (comment)");
3310 if (st->disposition & AV_DISPOSITION_LYRICS)
3311 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3312 if (st->disposition & AV_DISPOSITION_KARAOKE)
3313 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3314 if (st->disposition & AV_DISPOSITION_FORCED)
3315 av_log(NULL, AV_LOG_INFO, " (forced)");
3316 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3317 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3318 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3319 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3320 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3321 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3322 av_log(NULL, AV_LOG_INFO, "\n");
3323 dump_metadata(NULL, st->metadata, " ");
3326 #if FF_API_DUMP_FORMAT
3327 void dump_format(AVFormatContext *ic,
3332 av_dump_format(ic, index, url, is_output);
3336 void av_dump_format(AVFormatContext *ic,
3342 uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL;
3343 if (ic->nb_streams && !printed)
3346 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3347 is_output ? "Output" : "Input",
3349 is_output ? ic->oformat->name : ic->iformat->name,
3350 is_output ? "to" : "from", url);
3351 dump_metadata(NULL, ic->metadata, " ");
3353 av_log(NULL, AV_LOG_INFO, " Duration: ");
3354 if (ic->duration != AV_NOPTS_VALUE) {
3355 int hours, mins, secs, us;
3356 secs = ic->duration / AV_TIME_BASE;
3357 us = ic->duration % AV_TIME_BASE;
3362 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3363 (100 * us) / AV_TIME_BASE);
3365 av_log(NULL, AV_LOG_INFO, "N/A");
3367 if (ic->start_time != AV_NOPTS_VALUE) {
3369 av_log(NULL, AV_LOG_INFO, ", start: ");
3370 secs = ic->start_time / AV_TIME_BASE;
3371 us = abs(ic->start_time % AV_TIME_BASE);
3372 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3373 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3375 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3377 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3379 av_log(NULL, AV_LOG_INFO, "N/A");
3381 av_log(NULL, AV_LOG_INFO, "\n");
3383 for (i = 0; i < ic->nb_chapters; i++) {
3384 AVChapter *ch = ic->chapters[i];
3385 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3386 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3387 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3389 dump_metadata(NULL, ch->metadata, " ");
3391 if(ic->nb_programs) {
3392 int j, k, total = 0;
3393 for(j=0; j<ic->nb_programs; j++) {
3394 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3396 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3397 name ? name->value : "");
3398 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3399 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3400 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3401 printed[ic->programs[j]->stream_index[k]] = 1;
3403 total += ic->programs[j]->nb_stream_indexes;
3405 if (total < ic->nb_streams)
3406 av_log(NULL, AV_LOG_INFO, " No Program\n");
3408 for(i=0;i<ic->nb_streams;i++)
3410 dump_stream_format(ic, i, index, is_output);
3415 int64_t av_gettime(void)
3418 gettimeofday(&tv,NULL);
3419 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3422 uint64_t ff_ntp_time(void)
3424 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3427 #if FF_API_PARSE_DATE
3428 #include "libavutil/parseutils.h"
3430 int64_t parse_date(const char *timestr, int duration)
3433 av_parse_time(&timeval, timestr, duration);
3438 #if FF_API_FIND_INFO_TAG
3439 #include "libavutil/parseutils.h"
3441 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3443 return av_find_info_tag(arg, arg_size, tag1, info);
3447 int av_get_frame_filename(char *buf, int buf_size,
3448 const char *path, int number)
3451 char *q, buf1[20], c;
3452 int nd, len, percentd_found;
3464 while (isdigit(*p)) {
3465 nd = nd * 10 + *p++ - '0';
3468 } while (isdigit(c));
3477 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3479 if ((q - buf + len) > buf_size - 1)
3481 memcpy(q, buf1, len);
3489 if ((q - buf) < buf_size - 1)
3493 if (!percentd_found)
3502 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3506 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3508 for(i=0;i<size;i+=16) {
3515 PRINT(" %02x", buf[i+j]);
3520 for(j=0;j<len;j++) {
3522 if (c < ' ' || c > '~')
3531 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3533 hex_dump_internal(NULL, f, 0, buf, size);
3536 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3538 hex_dump_internal(avcl, NULL, level, buf, size);
3541 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3544 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3545 PRINT("stream #%d:\n", pkt->stream_index);
3546 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3547 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3548 /* DTS is _always_ valid after av_read_frame() */
3550 if (pkt->dts == AV_NOPTS_VALUE)
3553 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3554 /* PTS may not be known if B-frames are present. */
3556 if (pkt->pts == AV_NOPTS_VALUE)
3559 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3561 PRINT(" size=%d\n", pkt->size);
3564 av_hex_dump(f, pkt->data, pkt->size);
3568 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3570 AVRational tb = { 1, AV_TIME_BASE };
3571 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3575 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3577 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3581 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3583 AVRational tb = { 1, AV_TIME_BASE };
3584 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3588 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3591 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3594 void av_url_split(char *proto, int proto_size,
3595 char *authorization, int authorization_size,
3596 char *hostname, int hostname_size,
3598 char *path, int path_size,
3601 const char *p, *ls, *at, *col, *brk;
3603 if (port_ptr) *port_ptr = -1;
3604 if (proto_size > 0) proto[0] = 0;
3605 if (authorization_size > 0) authorization[0] = 0;
3606 if (hostname_size > 0) hostname[0] = 0;
3607 if (path_size > 0) path[0] = 0;
3609 /* parse protocol */
3610 if ((p = strchr(url, ':'))) {
3611 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3616 /* no protocol means plain filename */
3617 av_strlcpy(path, url, path_size);
3621 /* separate path from hostname */
3622 ls = strchr(p, '/');
3624 ls = strchr(p, '?');
3626 av_strlcpy(path, ls, path_size);
3628 ls = &p[strlen(p)]; // XXX
3630 /* the rest is hostname, use that to parse auth/port */
3632 /* authorization (user[:pass]@hostname) */
3633 if ((at = strchr(p, '@')) && at < ls) {
3634 av_strlcpy(authorization, p,
3635 FFMIN(authorization_size, at + 1 - p));
3636 p = at + 1; /* skip '@' */
3639 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3641 av_strlcpy(hostname, p + 1,
3642 FFMIN(hostname_size, brk - p));
3643 if (brk[1] == ':' && port_ptr)
3644 *port_ptr = atoi(brk + 2);
3645 } else if ((col = strchr(p, ':')) && col < ls) {
3646 av_strlcpy(hostname, p,
3647 FFMIN(col + 1 - p, hostname_size));
3648 if (port_ptr) *port_ptr = atoi(col + 1);
3650 av_strlcpy(hostname, p,
3651 FFMIN(ls + 1 - p, hostname_size));
3655 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3658 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3661 'C', 'D', 'E', 'F' };
3662 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3665 'c', 'd', 'e', 'f' };
3666 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3668 for(i = 0; i < s; i++) {
3669 buff[i * 2] = hex_table[src[i] >> 4];
3670 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3676 int ff_hex_to_data(uint8_t *data, const char *p)
3683 p += strspn(p, SPACE_CHARS);
3686 c = toupper((unsigned char) *p++);
3687 if (c >= '0' && c <= '9')
3689 else if (c >= 'A' && c <= 'F')
3704 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3705 unsigned int pts_num, unsigned int pts_den)
3708 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3709 if(new_tb.num != pts_num)
3710 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3712 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3714 if(new_tb.num <= 0 || new_tb.den <= 0) {
3715 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3718 s->time_base = new_tb;
3719 s->pts_wrap_bits = pts_wrap_bits;
3722 int ff_url_join(char *str, int size, const char *proto,
3723 const char *authorization, const char *hostname,
3724 int port, const char *fmt, ...)
3727 struct addrinfo hints, *ai;
3732 av_strlcatf(str, size, "%s://", proto);
3733 if (authorization && authorization[0])
3734 av_strlcatf(str, size, "%s@", authorization);
3735 #if CONFIG_NETWORK && defined(AF_INET6)
3736 /* Determine if hostname is a numerical IPv6 address,
3737 * properly escape it within [] in that case. */
3738 memset(&hints, 0, sizeof(hints));
3739 hints.ai_flags = AI_NUMERICHOST;
3740 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3741 if (ai->ai_family == AF_INET6) {
3742 av_strlcat(str, "[", size);
3743 av_strlcat(str, hostname, size);
3744 av_strlcat(str, "]", size);
3746 av_strlcat(str, hostname, size);
3751 /* Not an IPv6 address, just output the plain string. */
3752 av_strlcat(str, hostname, size);
3755 av_strlcatf(str, size, ":%d", port);
3758 int len = strlen(str);
3761 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3767 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3768 AVFormatContext *src)
3773 local_pkt.stream_index = dst_stream;
3774 if (pkt->pts != AV_NOPTS_VALUE)
3775 local_pkt.pts = av_rescale_q(pkt->pts,
3776 src->streams[pkt->stream_index]->time_base,
3777 dst->streams[dst_stream]->time_base);
3778 if (pkt->dts != AV_NOPTS_VALUE)
3779 local_pkt.dts = av_rescale_q(pkt->dts,
3780 src->streams[pkt->stream_index]->time_base,
3781 dst->streams[dst_stream]->time_base);
3782 return av_write_frame(dst, &local_pkt);
3785 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3788 const char *ptr = str;
3790 /* Parse key=value pairs. */
3793 char *dest = NULL, *dest_end;
3794 int key_len, dest_len = 0;
3796 /* Skip whitespace and potential commas. */
3797 while (*ptr && (isspace(*ptr) || *ptr == ','))
3804 if (!(ptr = strchr(key, '=')))
3807 key_len = ptr - key;
3809 callback_get_buf(context, key, key_len, &dest, &dest_len);
3810 dest_end = dest + dest_len - 1;
3814 while (*ptr && *ptr != '\"') {
3818 if (dest && dest < dest_end)
3822 if (dest && dest < dest_end)
3830 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3831 if (dest && dest < dest_end)
3839 int ff_find_stream_index(AVFormatContext *s, int id)
3842 for (i = 0; i < s->nb_streams; i++) {
3843 if (s->streams[i]->id == id)
3849 void ff_make_absolute_url(char *buf, int size, const char *base,
3853 /* Absolute path, relative to the current server */
3854 if (base && strstr(base, "://") && rel[0] == '/') {
3856 av_strlcpy(buf, base, size);
3857 sep = strstr(buf, "://");
3860 sep = strchr(sep, '/');
3864 av_strlcat(buf, rel, size);
3867 /* If rel actually is an absolute url, just copy it */
3868 if (!base || strstr(rel, "://") || rel[0] == '/') {
3869 av_strlcpy(buf, rel, size);
3873 av_strlcpy(buf, base, size);
3874 /* Remove the file name from the base url */
3875 sep = strrchr(buf, '/');
3880 while (av_strstart(rel, "../", NULL) && sep) {
3881 /* Remove the path delimiter at the end */
3883 sep = strrchr(buf, '/');
3884 /* If the next directory name to pop off is "..", break here */
3885 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3886 /* Readd the slash we just removed */
3887 av_strlcat(buf, "/", size);
3890 /* Cut off the directory name */
3897 av_strlcat(buf, rel, size);
3900 int64_t ff_iso8601_to_unix_time(const char *datestr)
3903 struct tm time = {0};
3904 strptime(datestr, "%Y - %m - %dT%T", &time);
3905 return mktime(&time);
3907 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3908 "the date string.\n");
3913 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3916 if (ofmt->query_codec)
3917 return ofmt->query_codec(codec_id, std_compliance);
3918 else if (ofmt->codec_tag)
3919 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3920 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3921 codec_id == ofmt->subtitle_codec)
3924 return AVERROR_PATCHWELCOME;