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 ff_read_frame_flush(s);
1754 if(flags & AVSEEK_FLAG_BYTE)
1755 return seek_frame_byte(s, stream_index, timestamp, flags);
1757 if(stream_index < 0){
1758 stream_index= av_find_default_stream_index(s);
1759 if(stream_index < 0)
1762 st= s->streams[stream_index];
1763 /* timestamp for default must be expressed in AV_TIME_BASE units */
1764 timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
1767 /* first, we try the format specific seek */
1768 if (s->iformat->read_seek)
1769 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
1776 if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH))
1777 return av_seek_frame_binary(s, stream_index, timestamp, flags);
1778 else if (!(s->iformat->flags & AVFMT_NOGENSEARCH))
1779 return seek_frame_generic(s, stream_index, timestamp, flags);
1784 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
1786 if(min_ts > ts || max_ts < ts)
1789 ff_read_frame_flush(s);
1791 if (s->iformat->read_seek2)
1792 return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
1794 if(s->iformat->read_timestamp){
1795 //try to seek via read_timestamp()
1798 //Fallback to old API if new is not implemented but old is
1799 //Note the old has somewat different sematics
1800 if(s->iformat->read_seek || 1)
1801 return av_seek_frame(s, stream_index, ts, flags | (ts - min_ts > (uint64_t)(max_ts - ts) ? AVSEEK_FLAG_BACKWARD : 0));
1803 // try some generic seek like seek_frame_generic() but with new ts semantics
1806 /*******************************************************/
1809 * Return TRUE if the stream has accurate duration in any stream.
1811 * @return TRUE if the stream has accurate duration for at least one component.
1813 static int has_duration(AVFormatContext *ic)
1818 for(i = 0;i < ic->nb_streams; i++) {
1819 st = ic->streams[i];
1820 if (st->duration != AV_NOPTS_VALUE)
1827 * Estimate the stream timings from the one of each components.
1829 * Also computes the global bitrate if possible.
1831 static void update_stream_timings(AVFormatContext *ic)
1833 int64_t start_time, start_time1, end_time, end_time1;
1834 int64_t duration, duration1;
1838 start_time = INT64_MAX;
1839 end_time = INT64_MIN;
1840 duration = INT64_MIN;
1841 for(i = 0;i < ic->nb_streams; i++) {
1842 st = ic->streams[i];
1843 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
1844 start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
1845 if (start_time1 < start_time)
1846 start_time = start_time1;
1847 if (st->duration != AV_NOPTS_VALUE) {
1848 end_time1 = start_time1
1849 + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1850 if (end_time1 > end_time)
1851 end_time = end_time1;
1854 if (st->duration != AV_NOPTS_VALUE) {
1855 duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
1856 if (duration1 > duration)
1857 duration = duration1;
1860 if (start_time != INT64_MAX) {
1861 ic->start_time = start_time;
1862 if (end_time != INT64_MIN) {
1863 if (end_time - start_time > duration)
1864 duration = end_time - start_time;
1867 if (duration != INT64_MIN) {
1868 ic->duration = duration;
1869 if (ic->file_size > 0) {
1870 /* compute the bitrate */
1871 ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE /
1872 (double)ic->duration;
1877 static void fill_all_stream_timings(AVFormatContext *ic)
1882 update_stream_timings(ic);
1883 for(i = 0;i < ic->nb_streams; i++) {
1884 st = ic->streams[i];
1885 if (st->start_time == AV_NOPTS_VALUE) {
1886 if(ic->start_time != AV_NOPTS_VALUE)
1887 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base);
1888 if(ic->duration != AV_NOPTS_VALUE)
1889 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base);
1894 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
1896 int64_t filesize, duration;
1900 /* if bit_rate is already set, we believe it */
1901 if (ic->bit_rate <= 0) {
1903 for(i=0;i<ic->nb_streams;i++) {
1904 st = ic->streams[i];
1905 if (st->codec->bit_rate > 0)
1906 bit_rate += st->codec->bit_rate;
1908 ic->bit_rate = bit_rate;
1911 /* if duration is already set, we believe it */
1912 if (ic->duration == AV_NOPTS_VALUE &&
1913 ic->bit_rate != 0 &&
1914 ic->file_size != 0) {
1915 filesize = ic->file_size;
1917 for(i = 0; i < ic->nb_streams; i++) {
1918 st = ic->streams[i];
1919 duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num);
1920 if (st->duration == AV_NOPTS_VALUE)
1921 st->duration = duration;
1927 #define DURATION_MAX_READ_SIZE 250000
1928 #define DURATION_MAX_RETRY 3
1930 /* only usable for MPEG-PS streams */
1931 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
1933 AVPacket pkt1, *pkt = &pkt1;
1935 int read_size, i, ret;
1937 int64_t filesize, offset, duration;
1942 /* flush packet queue */
1943 flush_packet_queue(ic);
1945 for (i=0; i<ic->nb_streams; i++) {
1946 st = ic->streams[i];
1947 if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
1948 av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n");
1951 av_parser_close(st->parser);
1953 av_free_packet(&st->cur_pkt);
1957 /* estimate the end time (duration) */
1958 /* XXX: may need to support wrapping */
1959 filesize = ic->file_size;
1960 end_time = AV_NOPTS_VALUE;
1962 offset = filesize - (DURATION_MAX_READ_SIZE<<retry);
1966 avio_seek(ic->pb, offset, SEEK_SET);
1969 if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
1973 ret = av_read_packet(ic, pkt);
1974 } while(ret == AVERROR(EAGAIN));
1977 read_size += pkt->size;
1978 st = ic->streams[pkt->stream_index];
1979 if (pkt->pts != AV_NOPTS_VALUE &&
1980 (st->start_time != AV_NOPTS_VALUE ||
1981 st->first_dts != AV_NOPTS_VALUE)) {
1982 duration = end_time = pkt->pts;
1983 if (st->start_time != AV_NOPTS_VALUE)
1984 duration -= st->start_time;
1986 duration -= st->first_dts;
1988 duration += 1LL<<st->pts_wrap_bits;
1990 if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
1991 st->duration = duration;
1994 av_free_packet(pkt);
1996 }while( end_time==AV_NOPTS_VALUE
1997 && filesize > (DURATION_MAX_READ_SIZE<<retry)
1998 && ++retry <= DURATION_MAX_RETRY);
2000 fill_all_stream_timings(ic);
2002 avio_seek(ic->pb, old_offset, SEEK_SET);
2003 for (i=0; i<ic->nb_streams; i++) {
2005 st->cur_dts= st->first_dts;
2006 st->last_IP_pts = AV_NOPTS_VALUE;
2007 st->reference_dts = AV_NOPTS_VALUE;
2011 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2015 /* get the file size, if possible */
2016 if (ic->iformat->flags & AVFMT_NOFILE) {
2019 file_size = avio_size(ic->pb);
2023 ic->file_size = file_size;
2025 if ((!strcmp(ic->iformat->name, "mpeg") ||
2026 !strcmp(ic->iformat->name, "mpegts")) &&
2027 file_size && ic->pb->seekable) {
2028 /* get accurate estimate from the PTSes */
2029 estimate_timings_from_pts(ic, old_offset);
2030 } else if (has_duration(ic)) {
2031 /* at least one component has timings - we use them for all
2033 fill_all_stream_timings(ic);
2035 av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n");
2036 /* less precise: use bitrate info */
2037 estimate_timings_from_bit_rate(ic);
2039 update_stream_timings(ic);
2043 AVStream av_unused *st;
2044 for(i = 0;i < ic->nb_streams; i++) {
2045 st = ic->streams[i];
2046 av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
2047 (double) st->start_time / AV_TIME_BASE,
2048 (double) st->duration / AV_TIME_BASE);
2050 av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
2051 (double) ic->start_time / AV_TIME_BASE,
2052 (double) ic->duration / AV_TIME_BASE,
2053 ic->bit_rate / 1000);
2057 static int has_codec_parameters(AVCodecContext *avctx)
2060 switch (avctx->codec_type) {
2061 case AVMEDIA_TYPE_AUDIO:
2062 val = avctx->sample_rate && avctx->channels && avctx->sample_fmt != AV_SAMPLE_FMT_NONE;
2063 if (!avctx->frame_size &&
2064 (avctx->codec_id == CODEC_ID_VORBIS ||
2065 avctx->codec_id == CODEC_ID_AAC ||
2066 avctx->codec_id == CODEC_ID_MP1 ||
2067 avctx->codec_id == CODEC_ID_MP2 ||
2068 avctx->codec_id == CODEC_ID_MP3 ||
2069 avctx->codec_id == CODEC_ID_SPEEX ||
2070 avctx->codec_id == CODEC_ID_CELT))
2073 case AVMEDIA_TYPE_VIDEO:
2074 val = avctx->width && avctx->pix_fmt != PIX_FMT_NONE;
2080 return avctx->codec_id != CODEC_ID_NONE && val != 0;
2083 static int has_decode_delay_been_guessed(AVStream *st)
2085 return st->codec->codec_id != CODEC_ID_H264 ||
2086 st->codec_info_nb_frames >= 6 + st->codec->has_b_frames;
2089 static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options)
2093 int got_picture, data_size, ret=0;
2096 if(!st->codec->codec){
2097 codec = avcodec_find_decoder(st->codec->codec_id);
2100 ret = avcodec_open2(st->codec, codec, options);
2105 if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st) ||
2106 (!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF)) {
2107 switch(st->codec->codec_type) {
2108 case AVMEDIA_TYPE_VIDEO:
2109 avcodec_get_frame_defaults(&picture);
2110 ret = avcodec_decode_video2(st->codec, &picture,
2111 &got_picture, avpkt);
2113 case AVMEDIA_TYPE_AUDIO:
2114 data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE);
2115 samples = av_malloc(data_size);
2118 ret = avcodec_decode_audio3(st->codec, samples,
2130 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id)
2132 while (tags->id != CODEC_ID_NONE) {
2140 enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2143 for(i=0; tags[i].id != CODEC_ID_NONE;i++) {
2144 if(tag == tags[i].tag)
2147 for(i=0; tags[i].id != CODEC_ID_NONE; i++) {
2148 if (ff_toupper4(tag) == ff_toupper4(tags[i].tag))
2151 return CODEC_ID_NONE;
2154 unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id)
2157 for(i=0; tags && tags[i]; i++){
2158 int tag= ff_codec_get_tag(tags[i], id);
2164 enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag)
2167 for(i=0; tags && tags[i]; i++){
2168 enum CodecID id= ff_codec_get_id(tags[i], tag);
2169 if(id!=CODEC_ID_NONE) return id;
2171 return CODEC_ID_NONE;
2174 static void compute_chapters_end(AVFormatContext *s)
2177 int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2179 for (i = 0; i < s->nb_chapters; i++)
2180 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2181 AVChapter *ch = s->chapters[i];
2182 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base)
2185 for (j = 0; j < s->nb_chapters; j++) {
2186 AVChapter *ch1 = s->chapters[j];
2187 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base);
2188 if (j != i && next_start > ch->start && next_start < end)
2191 ch->end = (end == INT64_MAX) ? ch->start : end;
2195 static int get_std_framerate(int i){
2196 if(i<60*12) return i*1001;
2197 else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12;
2201 * Is the time base unreliable.
2202 * This is a heuristic to balance between quick acceptance of the values in
2203 * the headers vs. some extra checks.
2204 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2205 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2206 * And there are "variable" fps files this needs to detect as well.
2208 static int tb_unreliable(AVCodecContext *c){
2209 if( c->time_base.den >= 101L*c->time_base.num
2210 || c->time_base.den < 5L*c->time_base.num
2211 /* || c->codec_tag == AV_RL32("DIVX")
2212 || c->codec_tag == AV_RL32("XVID")*/
2213 || c->codec_id == CODEC_ID_MPEG2VIDEO
2214 || c->codec_id == CODEC_ID_H264
2220 #if FF_API_FORMAT_PARAMETERS
2221 int av_find_stream_info(AVFormatContext *ic)
2223 return avformat_find_stream_info(ic, NULL);
2227 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
2229 int i, count, ret, read_size, j;
2231 AVPacket pkt1, *pkt;
2232 int64_t old_offset = avio_tell(ic->pb);
2233 int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
2235 for(i=0;i<ic->nb_streams;i++) {
2237 st = ic->streams[i];
2239 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2240 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2241 /* if(!st->time_base.num)
2243 if(!st->codec->time_base.num)
2244 st->codec->time_base= st->time_base;
2246 //only for the split stuff
2247 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
2248 st->parser = av_parser_init(st->codec->codec_id);
2249 if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
2250 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
2253 assert(!st->codec->codec);
2254 codec = avcodec_find_decoder(st->codec->codec_id);
2256 /* Ensure that subtitle_header is properly set. */
2257 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
2258 && codec && !st->codec->codec)
2259 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2261 //try to just open decoders, in case this is enough to get parameters
2262 if(!has_codec_parameters(st->codec)){
2263 if (codec && !st->codec->codec)
2264 avcodec_open2(st->codec, codec, options ? &options[i] : NULL);
2268 for (i=0; i<ic->nb_streams; i++) {
2269 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
2275 if(url_interrupt_cb()){
2277 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
2281 /* check if one codec still needs to be handled */
2282 for(i=0;i<ic->nb_streams;i++) {
2283 int fps_analyze_framecount = 20;
2285 st = ic->streams[i];
2286 if (!has_codec_parameters(st->codec))
2288 /* if the timebase is coarse (like the usual millisecond precision
2289 of mkv), we need to analyze more frames to reliably arrive at
2291 if (av_q2d(st->time_base) > 0.0005)
2292 fps_analyze_framecount *= 2;
2293 if (ic->fps_probe_size >= 0)
2294 fps_analyze_framecount = ic->fps_probe_size;
2295 /* variable fps and no guess at the real fps */
2296 if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num)
2297 && st->info->duration_count < fps_analyze_framecount
2298 && st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2300 if(st->parser && st->parser->parser->split && !st->codec->extradata)
2302 if(st->first_dts == AV_NOPTS_VALUE)
2305 if (i == ic->nb_streams) {
2306 /* NOTE: if the format has no header, then we need to read
2307 some packets to get most of the streams, so we cannot
2309 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
2310 /* if we found the info for all the codecs, we can stop */
2312 av_log(ic, AV_LOG_DEBUG, "All info found\n");
2316 /* we did not get all the codec info, but we read too much data */
2317 if (read_size >= ic->probesize) {
2319 av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize);
2323 /* NOTE: a new stream can be added there if no header in file
2324 (AVFMTCTX_NOHEADER) */
2325 ret = read_frame_internal(ic, &pkt1);
2326 if (ret == AVERROR(EAGAIN))
2331 ret = -1; /* we could not have all the codec parameters before EOF */
2332 for(i=0;i<ic->nb_streams;i++) {
2333 st = ic->streams[i];
2334 if (!has_codec_parameters(st->codec)){
2336 avcodec_string(buf, sizeof(buf), st->codec, 0);
2337 av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf);
2345 pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
2346 if ((ret = av_dup_packet(pkt)) < 0)
2347 goto find_stream_info_err;
2349 read_size += pkt->size;
2351 st = ic->streams[pkt->stream_index];
2352 if (st->codec_info_nb_frames>1) {
2353 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) {
2354 av_log(ic, AV_LOG_WARNING, "max_analyze_duration reached\n");
2357 st->info->codec_info_duration += pkt->duration;
2360 int64_t last = st->info->last_dts;
2361 int64_t duration= pkt->dts - last;
2363 if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && duration>0){
2364 double dur= duration * av_q2d(st->time_base);
2366 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2367 // av_log(NULL, AV_LOG_ERROR, "%f\n", dur);
2368 if (st->info->duration_count < 2)
2369 memset(st->info->duration_error, 0, sizeof(st->info->duration_error));
2370 for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) {
2371 int framerate= get_std_framerate(i);
2372 int ticks= lrintf(dur*framerate/(1001*12));
2373 double error= dur - ticks*1001*12/(double)framerate;
2374 st->info->duration_error[i] += error*error;
2376 st->info->duration_count++;
2377 // ignore the first 4 values, they might have some random jitter
2378 if (st->info->duration_count > 3)
2379 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
2381 if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1)
2382 st->info->last_dts = pkt->dts;
2384 if(st->parser && st->parser->parser->split && !st->codec->extradata){
2385 int i= st->parser->parser->split(st->codec, pkt->data, pkt->size);
2387 st->codec->extradata_size= i;
2388 st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
2389 memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size);
2390 memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2394 /* if still no information, we try to open the codec and to
2395 decompress the frame. We try to avoid that in most cases as
2396 it takes longer and uses more memory. For MPEG-4, we need to
2397 decompress for QuickTime.
2399 If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
2400 least one frame of codec data, this makes sure the codec initializes
2401 the channel configuration and does not only trust the values from the container.
2403 try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL);
2405 st->codec_info_nb_frames++;
2409 // close codecs which were opened in try_decode_frame()
2410 for(i=0;i<ic->nb_streams;i++) {
2411 st = ic->streams[i];
2412 if(st->codec->codec)
2413 avcodec_close(st->codec);
2415 for(i=0;i<ic->nb_streams;i++) {
2416 st = ic->streams[i];
2417 if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration)
2418 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
2419 (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den,
2420 st->info->codec_info_duration*(int64_t)st->time_base.num, 60000);
2421 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2422 // the check for tb_unreliable() is not completely correct, since this is not about handling
2423 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
2424 // ipmovie.c produces.
2425 if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > 1 && !st->r_frame_rate.num)
2426 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);
2427 if (st->info->duration_count && !st->r_frame_rate.num
2428 && tb_unreliable(st->codec) /*&&
2429 //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ...
2430 st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){
2432 double best_error= 2*av_q2d(st->time_base);
2433 best_error = best_error*best_error*st->info->duration_count*1000*12*30;
2435 for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) {
2436 double error = st->info->duration_error[j] * get_std_framerate(j);
2437 // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
2438 // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error);
2439 if(error < best_error){
2441 num = get_std_framerate(j);
2444 // do not increase frame rate by more than 1 % in order to match a standard rate.
2445 if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate)))
2446 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
2449 if (!st->r_frame_rate.num){
2450 if( st->codec->time_base.den * (int64_t)st->time_base.num
2451 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){
2452 st->r_frame_rate.num = st->codec->time_base.den;
2453 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
2455 st->r_frame_rate.num = st->time_base.den;
2456 st->r_frame_rate.den = st->time_base.num;
2459 }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2460 if(!st->codec->bits_per_coded_sample)
2461 st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id);
2462 // set stream disposition based on audio service type
2463 switch (st->codec->audio_service_type) {
2464 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
2465 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break;
2466 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
2467 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break;
2468 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
2469 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break;
2470 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
2471 st->disposition = AV_DISPOSITION_COMMENT; break;
2472 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
2473 st->disposition = AV_DISPOSITION_KARAOKE; break;
2478 estimate_timings(ic, old_offset);
2480 compute_chapters_end(ic);
2483 /* correct DTS for B-frame streams with no timestamps */
2484 for(i=0;i<ic->nb_streams;i++) {
2485 st = ic->streams[i];
2486 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2488 ppktl = &ic->packet_buffer;
2490 if(ppkt1->stream_index != i)
2492 if(ppkt1->pkt->dts < 0)
2494 if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
2496 ppkt1->pkt->dts -= delta;
2501 st->cur_dts -= delta;
2507 find_stream_info_err:
2508 for (i=0; i < ic->nb_streams; i++)
2509 av_freep(&ic->streams[i]->info);
2513 static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
2517 for (i = 0; i < ic->nb_programs; i++)
2518 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
2519 if (ic->programs[i]->stream_index[j] == s)
2520 return ic->programs[i];
2524 int av_find_best_stream(AVFormatContext *ic,
2525 enum AVMediaType type,
2526 int wanted_stream_nb,
2528 AVCodec **decoder_ret,
2531 int i, nb_streams = ic->nb_streams;
2532 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
2533 unsigned *program = NULL;
2534 AVCodec *decoder = NULL, *best_decoder = NULL;
2536 if (related_stream >= 0 && wanted_stream_nb < 0) {
2537 AVProgram *p = find_program_from_stream(ic, related_stream);
2539 program = p->stream_index;
2540 nb_streams = p->nb_stream_indexes;
2543 for (i = 0; i < nb_streams; i++) {
2544 int real_stream_index = program ? program[i] : i;
2545 AVStream *st = ic->streams[real_stream_index];
2546 AVCodecContext *avctx = st->codec;
2547 if (avctx->codec_type != type)
2549 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
2551 if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED))
2554 decoder = avcodec_find_decoder(st->codec->codec_id);
2557 ret = AVERROR_DECODER_NOT_FOUND;
2561 if (best_count >= st->codec_info_nb_frames)
2563 best_count = st->codec_info_nb_frames;
2564 ret = real_stream_index;
2565 best_decoder = decoder;
2566 if (program && i == nb_streams - 1 && ret < 0) {
2568 nb_streams = ic->nb_streams;
2569 i = 0; /* no related stream found, try again with everything */
2573 *decoder_ret = best_decoder;
2577 /*******************************************************/
2579 int av_read_play(AVFormatContext *s)
2581 if (s->iformat->read_play)
2582 return s->iformat->read_play(s);
2584 return avio_pause(s->pb, 0);
2585 return AVERROR(ENOSYS);
2588 int av_read_pause(AVFormatContext *s)
2590 if (s->iformat->read_pause)
2591 return s->iformat->read_pause(s);
2593 return avio_pause(s->pb, 1);
2594 return AVERROR(ENOSYS);
2597 void av_close_input_stream(AVFormatContext *s)
2599 flush_packet_queue(s);
2600 if (s->iformat->read_close)
2601 s->iformat->read_close(s);
2602 avformat_free_context(s);
2605 void avformat_free_context(AVFormatContext *s)
2611 if (s->iformat && s->iformat->priv_class && s->priv_data)
2612 av_opt_free(s->priv_data);
2614 for(i=0;i<s->nb_streams;i++) {
2615 /* free all data in a stream component */
2618 av_parser_close(st->parser);
2619 av_free_packet(&st->cur_pkt);
2621 av_dict_free(&st->metadata);
2622 av_free(st->index_entries);
2623 av_free(st->codec->extradata);
2624 av_free(st->codec->subtitle_header);
2626 av_free(st->priv_data);
2630 for(i=s->nb_programs-1; i>=0; i--) {
2631 av_dict_free(&s->programs[i]->metadata);
2632 av_freep(&s->programs[i]->stream_index);
2633 av_freep(&s->programs[i]);
2635 av_freep(&s->programs);
2636 av_freep(&s->priv_data);
2637 while(s->nb_chapters--) {
2638 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
2639 av_free(s->chapters[s->nb_chapters]);
2641 av_freep(&s->chapters);
2642 av_dict_free(&s->metadata);
2643 av_freep(&s->streams);
2647 void av_close_input_file(AVFormatContext *s)
2649 AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
2651 av_close_input_stream(s);
2656 AVStream *av_new_stream(AVFormatContext *s, int id)
2662 if (s->nb_streams >= INT_MAX/sizeof(*streams))
2664 streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams));
2667 s->streams = streams;
2669 st = av_mallocz(sizeof(AVStream));
2672 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
2677 st->codec = avcodec_alloc_context3(NULL);
2679 /* no default bitrate if decoding */
2680 st->codec->bit_rate = 0;
2682 st->index = s->nb_streams;
2684 st->start_time = AV_NOPTS_VALUE;
2685 st->duration = AV_NOPTS_VALUE;
2686 /* we set the current DTS to 0 so that formats without any timestamps
2687 but durations get some timestamps, formats with some unknown
2688 timestamps have their first few packets buffered and the
2689 timestamps corrected before they are returned to the user */
2691 st->first_dts = AV_NOPTS_VALUE;
2692 st->probe_packets = MAX_PROBE_PACKETS;
2694 /* default pts setting is MPEG-like */
2695 av_set_pts_info(st, 33, 1, 90000);
2696 st->last_IP_pts = AV_NOPTS_VALUE;
2697 for(i=0; i<MAX_REORDER_DELAY+1; i++)
2698 st->pts_buffer[i]= AV_NOPTS_VALUE;
2699 st->reference_dts = AV_NOPTS_VALUE;
2701 st->sample_aspect_ratio = (AVRational){0,1};
2703 s->streams[s->nb_streams++] = st;
2707 AVProgram *av_new_program(AVFormatContext *ac, int id)
2709 AVProgram *program=NULL;
2712 av_dlog(ac, "new_program: id=0x%04x\n", id);
2714 for(i=0; i<ac->nb_programs; i++)
2715 if(ac->programs[i]->id == id)
2716 program = ac->programs[i];
2719 program = av_mallocz(sizeof(AVProgram));
2722 dynarray_add(&ac->programs, &ac->nb_programs, program);
2723 program->discard = AVDISCARD_NONE;
2730 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
2732 AVChapter *chapter = NULL;
2735 for(i=0; i<s->nb_chapters; i++)
2736 if(s->chapters[i]->id == id)
2737 chapter = s->chapters[i];
2740 chapter= av_mallocz(sizeof(AVChapter));
2743 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
2745 av_dict_set(&chapter->metadata, "title", title, 0);
2747 chapter->time_base= time_base;
2748 chapter->start = start;
2754 /************************************************************/
2755 /* output media file */
2757 #if FF_API_FORMAT_PARAMETERS
2758 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
2762 if (s->oformat->priv_data_size > 0) {
2763 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2765 return AVERROR(ENOMEM);
2766 if (s->oformat->priv_class) {
2767 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2768 av_opt_set_defaults(s->priv_data);
2771 s->priv_data = NULL;
2773 if (s->oformat->set_parameters) {
2774 ret = s->oformat->set_parameters(s, ap);
2782 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
2784 const AVCodecTag *avctag;
2786 enum CodecID id = CODEC_ID_NONE;
2787 unsigned int tag = 0;
2790 * Check that tag + id is in the table
2791 * If neither is in the table -> OK
2792 * If tag is in the table with another id -> FAIL
2793 * If id is in the table with another tag -> FAIL unless strict < normal
2795 for (n = 0; s->oformat->codec_tag[n]; n++) {
2796 avctag = s->oformat->codec_tag[n];
2797 while (avctag->id != CODEC_ID_NONE) {
2798 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) {
2800 if (id == st->codec->codec_id)
2803 if (avctag->id == st->codec->codec_id)
2808 if (id != CODEC_ID_NONE)
2810 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
2815 #if FF_API_FORMAT_PARAMETERS
2816 int av_write_header(AVFormatContext *s)
2818 return avformat_write_header(s, NULL);
2822 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
2826 AVDictionary *tmp = NULL;
2829 av_dict_copy(&tmp, *options, 0);
2830 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
2833 // some sanity checks
2834 if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) {
2835 av_log(s, AV_LOG_ERROR, "no streams\n");
2836 ret = AVERROR(EINVAL);
2840 for(i=0;i<s->nb_streams;i++) {
2843 switch (st->codec->codec_type) {
2844 case AVMEDIA_TYPE_AUDIO:
2845 if(st->codec->sample_rate<=0){
2846 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
2847 ret = AVERROR(EINVAL);
2850 if(!st->codec->block_align)
2851 st->codec->block_align = st->codec->channels *
2852 av_get_bits_per_sample(st->codec->codec_id) >> 3;
2854 case AVMEDIA_TYPE_VIDEO:
2855 if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too?
2856 av_log(s, AV_LOG_ERROR, "time base not set\n");
2857 ret = AVERROR(EINVAL);
2860 if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){
2861 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
2862 ret = AVERROR(EINVAL);
2865 if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)){
2866 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n");
2867 ret = AVERROR(EINVAL);
2873 if(s->oformat->codec_tag){
2874 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)){
2875 //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here
2876 st->codec->codec_tag= 0;
2878 if(st->codec->codec_tag){
2879 if (!validate_codec_tag(s, st)) {
2881 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag);
2882 av_log(s, AV_LOG_ERROR,
2883 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
2884 tagbuf, st->codec->codec_tag, st->codec->codec_id);
2885 ret = AVERROR_INVALIDDATA;
2889 st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id);
2892 if(s->oformat->flags & AVFMT_GLOBALHEADER &&
2893 !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER))
2894 av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i);
2897 if (!s->priv_data && s->oformat->priv_data_size > 0) {
2898 s->priv_data = av_mallocz(s->oformat->priv_data_size);
2899 if (!s->priv_data) {
2900 ret = AVERROR(ENOMEM);
2903 if (s->oformat->priv_class) {
2904 *(const AVClass**)s->priv_data= s->oformat->priv_class;
2905 av_opt_set_defaults(s->priv_data);
2906 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
2911 /* set muxer identification string */
2912 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
2913 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
2916 if(s->oformat->write_header){
2917 ret = s->oformat->write_header(s);
2922 /* init PTS generation */
2923 for(i=0;i<s->nb_streams;i++) {
2924 int64_t den = AV_NOPTS_VALUE;
2927 switch (st->codec->codec_type) {
2928 case AVMEDIA_TYPE_AUDIO:
2929 den = (int64_t)st->time_base.num * st->codec->sample_rate;
2931 case AVMEDIA_TYPE_VIDEO:
2932 den = (int64_t)st->time_base.num * st->codec->time_base.den;
2937 if (den != AV_NOPTS_VALUE) {
2939 ret = AVERROR_INVALIDDATA;
2942 frac_init(&st->pts, 0, 0, den);
2947 av_dict_free(options);
2956 //FIXME merge with compute_pkt_fields
2957 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){
2958 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
2959 int num, den, frame_size, i;
2961 av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n",
2962 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
2964 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
2965 return AVERROR(EINVAL);*/
2967 /* duration field */
2968 if (pkt->duration == 0) {
2969 compute_frame_duration(&num, &den, st, NULL, pkt);
2971 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
2975 if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0)
2978 //XXX/FIXME this is a temporary hack until all encoders output pts
2979 if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){
2981 // pkt->pts= st->cur_dts;
2982 pkt->pts= st->pts.val;
2985 //calculate dts from pts
2986 if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){
2987 st->pts_buffer[0]= pkt->pts;
2988 for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
2989 st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration;
2990 for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++)
2991 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]);
2993 pkt->dts= st->pts_buffer[0];
2996 if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && st->cur_dts >= pkt->dts){
2997 av_log(s, AV_LOG_ERROR,
2998 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n",
2999 st->index, st->cur_dts, pkt->dts);
3000 return AVERROR(EINVAL);
3002 if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){
3003 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
3004 return AVERROR(EINVAL);
3007 // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts);
3008 st->cur_dts= pkt->dts;
3009 st->pts.val= pkt->dts;
3012 switch (st->codec->codec_type) {
3013 case AVMEDIA_TYPE_AUDIO:
3014 frame_size = get_audio_frame_size(st->codec, pkt->size);
3016 /* HACK/FIXME, we skip the initial 0 size packets as they are most
3017 likely equal to the encoder delay, but it would be better if we
3018 had the real timestamps from the encoder */
3019 if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
3020 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
3023 case AVMEDIA_TYPE_VIDEO:
3024 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
3032 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
3034 int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
3036 if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3039 ret= s->oformat->write_packet(s, pkt);
3042 s->streams[pkt->stream_index]->nb_frames++;
3046 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
3047 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
3049 AVPacketList **next_point, *this_pktl;
3051 this_pktl = av_mallocz(sizeof(AVPacketList));
3052 this_pktl->pkt= *pkt;
3053 pkt->destruct= NULL; // do not free original but only the copy
3054 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
3056 if(s->streams[pkt->stream_index]->last_in_packet_buffer){
3057 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
3059 next_point = &s->packet_buffer;
3062 if(compare(s, &s->packet_buffer_end->pkt, pkt)){
3063 while(!compare(s, &(*next_point)->pkt, pkt)){
3064 next_point= &(*next_point)->next;
3068 next_point = &(s->packet_buffer_end->next);
3071 assert(!*next_point);
3073 s->packet_buffer_end= this_pktl;
3076 this_pktl->next= *next_point;
3078 s->streams[pkt->stream_index]->last_in_packet_buffer=
3079 *next_point= this_pktl;
3082 static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
3084 AVStream *st = s->streams[ pkt ->stream_index];
3085 AVStream *st2= s->streams[ next->stream_index];
3086 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
3090 return pkt->stream_index < next->stream_index;
3094 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){
3100 ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts);
3103 for(i=0; i < s->nb_streams; i++)
3104 stream_count+= !!s->streams[i]->last_in_packet_buffer;
3106 if(stream_count && (s->nb_streams == stream_count || flush)){
3107 pktl= s->packet_buffer;
3110 s->packet_buffer= pktl->next;
3111 if(!s->packet_buffer)
3112 s->packet_buffer_end= NULL;
3114 if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
3115 s->streams[out->stream_index]->last_in_packet_buffer= NULL;
3119 av_init_packet(out);
3125 * Interleave an AVPacket correctly so it can be muxed.
3126 * @param out the interleaved packet will be output here
3127 * @param in the input packet
3128 * @param flush 1 if no further packets are available as input and all
3129 * remaining packets should be output
3130 * @return 1 if a packet was output, 0 if no packet could be output,
3131 * < 0 if an error occurred
3133 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){
3134 if(s->oformat->interleave_packet)
3135 return s->oformat->interleave_packet(s, out, in, flush);
3137 return av_interleave_packet_per_dts(s, out, in, flush);
3140 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){
3141 AVStream *st= s->streams[ pkt->stream_index];
3144 //FIXME/XXX/HACK drop zero sized packets
3145 if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0)
3148 av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n",
3149 pkt->size, pkt->dts, pkt->pts);
3150 if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3153 if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
3154 return AVERROR(EINVAL);
3158 int ret= interleave_packet(s, &opkt, pkt, 0);
3159 if(ret<=0) //FIXME cleanup needed for ret<0 ?
3162 ret= s->oformat->write_packet(s, &opkt);
3164 s->streams[opkt.stream_index]->nb_frames++;
3166 av_free_packet(&opkt);
3174 int av_write_trailer(AVFormatContext *s)
3180 ret= interleave_packet(s, &pkt, NULL, 1);
3181 if(ret<0) //FIXME cleanup needed for ret<0 ?
3186 ret= s->oformat->write_packet(s, &pkt);
3188 s->streams[pkt.stream_index]->nb_frames++;
3190 av_free_packet(&pkt);
3196 if(s->oformat->write_trailer)
3197 ret = s->oformat->write_trailer(s);
3199 for(i=0;i<s->nb_streams;i++) {
3200 av_freep(&s->streams[i]->priv_data);
3201 av_freep(&s->streams[i]->index_entries);
3203 if (s->iformat && s->iformat->priv_class)
3204 av_opt_free(s->priv_data);
3205 av_freep(&s->priv_data);
3209 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
3212 AVProgram *program=NULL;
3215 if (idx >= ac->nb_streams) {
3216 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3220 for(i=0; i<ac->nb_programs; i++){
3221 if(ac->programs[i]->id != progid)
3223 program = ac->programs[i];
3224 for(j=0; j<program->nb_stream_indexes; j++)
3225 if(program->stream_index[j] == idx)
3228 tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1));
3231 program->stream_index = tmp;
3232 program->stream_index[program->nb_stream_indexes++] = idx;
3237 static void print_fps(double d, const char *postfix){
3238 uint64_t v= lrintf(d*100);
3239 if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix);
3240 else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix);
3241 else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix);
3244 static void dump_metadata(void *ctx, AVDictionary *m, const char *indent)
3246 if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){
3247 AVDictionaryEntry *tag=NULL;
3249 av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent);
3250 while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
3251 if(strcmp("language", tag->key))
3252 av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tag->value);
3257 /* "user interface" functions */
3258 static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output)
3261 int flags = (is_output ? ic->oformat->flags : ic->iformat->flags);
3262 AVStream *st = ic->streams[i];
3263 int g = av_gcd(st->time_base.num, st->time_base.den);
3264 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
3265 avcodec_string(buf, sizeof(buf), st->codec, is_output);
3266 av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i);
3267 /* the pid is an important information, so we display it */
3268 /* XXX: add a generic system */
3269 if (flags & AVFMT_SHOW_IDS)
3270 av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id);
3272 av_log(NULL, AV_LOG_INFO, "(%s)", lang->value);
3273 av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g);
3274 av_log(NULL, AV_LOG_INFO, ": %s", buf);
3275 if (st->sample_aspect_ratio.num && // default
3276 av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) {
3277 AVRational display_aspect_ratio;
3278 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
3279 st->codec->width*st->sample_aspect_ratio.num,
3280 st->codec->height*st->sample_aspect_ratio.den,
3282 av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d",
3283 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
3284 display_aspect_ratio.num, display_aspect_ratio.den);
3286 if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){
3287 if(st->avg_frame_rate.den && st->avg_frame_rate.num)
3288 print_fps(av_q2d(st->avg_frame_rate), "fps");
3289 if(st->r_frame_rate.den && st->r_frame_rate.num)
3290 print_fps(av_q2d(st->r_frame_rate), "tbr");
3291 if(st->time_base.den && st->time_base.num)
3292 print_fps(1/av_q2d(st->time_base), "tbn");
3293 if(st->codec->time_base.den && st->codec->time_base.num)
3294 print_fps(1/av_q2d(st->codec->time_base), "tbc");
3296 if (st->disposition & AV_DISPOSITION_DEFAULT)
3297 av_log(NULL, AV_LOG_INFO, " (default)");
3298 if (st->disposition & AV_DISPOSITION_DUB)
3299 av_log(NULL, AV_LOG_INFO, " (dub)");
3300 if (st->disposition & AV_DISPOSITION_ORIGINAL)
3301 av_log(NULL, AV_LOG_INFO, " (original)");
3302 if (st->disposition & AV_DISPOSITION_COMMENT)
3303 av_log(NULL, AV_LOG_INFO, " (comment)");
3304 if (st->disposition & AV_DISPOSITION_LYRICS)
3305 av_log(NULL, AV_LOG_INFO, " (lyrics)");
3306 if (st->disposition & AV_DISPOSITION_KARAOKE)
3307 av_log(NULL, AV_LOG_INFO, " (karaoke)");
3308 if (st->disposition & AV_DISPOSITION_FORCED)
3309 av_log(NULL, AV_LOG_INFO, " (forced)");
3310 if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
3311 av_log(NULL, AV_LOG_INFO, " (hearing impaired)");
3312 if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
3313 av_log(NULL, AV_LOG_INFO, " (visual impaired)");
3314 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
3315 av_log(NULL, AV_LOG_INFO, " (clean effects)");
3316 av_log(NULL, AV_LOG_INFO, "\n");
3317 dump_metadata(NULL, st->metadata, " ");
3320 #if FF_API_DUMP_FORMAT
3321 void dump_format(AVFormatContext *ic,
3326 av_dump_format(ic, index, url, is_output);
3330 void av_dump_format(AVFormatContext *ic,
3336 uint8_t *printed = av_mallocz(ic->nb_streams);
3337 if (ic->nb_streams && !printed)
3340 av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n",
3341 is_output ? "Output" : "Input",
3343 is_output ? ic->oformat->name : ic->iformat->name,
3344 is_output ? "to" : "from", url);
3345 dump_metadata(NULL, ic->metadata, " ");
3347 av_log(NULL, AV_LOG_INFO, " Duration: ");
3348 if (ic->duration != AV_NOPTS_VALUE) {
3349 int hours, mins, secs, us;
3350 secs = ic->duration / AV_TIME_BASE;
3351 us = ic->duration % AV_TIME_BASE;
3356 av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs,
3357 (100 * us) / AV_TIME_BASE);
3359 av_log(NULL, AV_LOG_INFO, "N/A");
3361 if (ic->start_time != AV_NOPTS_VALUE) {
3363 av_log(NULL, AV_LOG_INFO, ", start: ");
3364 secs = ic->start_time / AV_TIME_BASE;
3365 us = abs(ic->start_time % AV_TIME_BASE);
3366 av_log(NULL, AV_LOG_INFO, "%d.%06d",
3367 secs, (int)av_rescale(us, 1000000, AV_TIME_BASE));
3369 av_log(NULL, AV_LOG_INFO, ", bitrate: ");
3371 av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000);
3373 av_log(NULL, AV_LOG_INFO, "N/A");
3375 av_log(NULL, AV_LOG_INFO, "\n");
3377 for (i = 0; i < ic->nb_chapters; i++) {
3378 AVChapter *ch = ic->chapters[i];
3379 av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i);
3380 av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base));
3381 av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base));
3383 dump_metadata(NULL, ch->metadata, " ");
3385 if(ic->nb_programs) {
3386 int j, k, total = 0;
3387 for(j=0; j<ic->nb_programs; j++) {
3388 AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata,
3390 av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id,
3391 name ? name->value : "");
3392 dump_metadata(NULL, ic->programs[j]->metadata, " ");
3393 for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) {
3394 dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output);
3395 printed[ic->programs[j]->stream_index[k]] = 1;
3397 total += ic->programs[j]->nb_stream_indexes;
3399 if (total < ic->nb_streams)
3400 av_log(NULL, AV_LOG_INFO, " No Program\n");
3402 for(i=0;i<ic->nb_streams;i++)
3404 dump_stream_format(ic, i, index, is_output);
3409 int64_t av_gettime(void)
3412 gettimeofday(&tv,NULL);
3413 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
3416 uint64_t ff_ntp_time(void)
3418 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3421 #if FF_API_PARSE_DATE
3422 #include "libavutil/parseutils.h"
3424 int64_t parse_date(const char *timestr, int duration)
3427 av_parse_time(&timeval, timestr, duration);
3432 #if FF_API_FIND_INFO_TAG
3433 #include "libavutil/parseutils.h"
3435 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
3437 return av_find_info_tag(arg, arg_size, tag1, info);
3441 int av_get_frame_filename(char *buf, int buf_size,
3442 const char *path, int number)
3445 char *q, buf1[20], c;
3446 int nd, len, percentd_found;
3458 while (isdigit(*p)) {
3459 nd = nd * 10 + *p++ - '0';
3462 } while (isdigit(c));
3471 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
3473 if ((q - buf + len) > buf_size - 1)
3475 memcpy(q, buf1, len);
3483 if ((q - buf) < buf_size - 1)
3487 if (!percentd_found)
3496 static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size)
3500 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3502 for(i=0;i<size;i+=16) {
3509 PRINT(" %02x", buf[i+j]);
3514 for(j=0;j<len;j++) {
3516 if (c < ' ' || c > '~')
3525 void av_hex_dump(FILE *f, uint8_t *buf, int size)
3527 hex_dump_internal(NULL, f, 0, buf, size);
3530 void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size)
3532 hex_dump_internal(avcl, NULL, level, buf, size);
3535 static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
3538 #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
3539 PRINT("stream #%d:\n", pkt->stream_index);
3540 PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0));
3541 PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base));
3542 /* DTS is _always_ valid after av_read_frame() */
3544 if (pkt->dts == AV_NOPTS_VALUE)
3547 PRINT("%0.3f", pkt->dts * av_q2d(time_base));
3548 /* PTS may not be known if B-frames are present. */
3550 if (pkt->pts == AV_NOPTS_VALUE)
3553 PRINT("%0.3f", pkt->pts * av_q2d(time_base));
3555 PRINT(" size=%d\n", pkt->size);
3558 av_hex_dump(f, pkt->data, pkt->size);
3562 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload)
3564 AVRational tb = { 1, AV_TIME_BASE };
3565 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb);
3569 void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
3571 pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base);
3575 void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload)
3577 AVRational tb = { 1, AV_TIME_BASE };
3578 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb);
3582 void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
3585 pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base);
3588 void av_url_split(char *proto, int proto_size,
3589 char *authorization, int authorization_size,
3590 char *hostname, int hostname_size,
3592 char *path, int path_size,
3595 const char *p, *ls, *at, *col, *brk;
3597 if (port_ptr) *port_ptr = -1;
3598 if (proto_size > 0) proto[0] = 0;
3599 if (authorization_size > 0) authorization[0] = 0;
3600 if (hostname_size > 0) hostname[0] = 0;
3601 if (path_size > 0) path[0] = 0;
3603 /* parse protocol */
3604 if ((p = strchr(url, ':'))) {
3605 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
3610 /* no protocol means plain filename */
3611 av_strlcpy(path, url, path_size);
3615 /* separate path from hostname */
3616 ls = strchr(p, '/');
3618 ls = strchr(p, '?');
3620 av_strlcpy(path, ls, path_size);
3622 ls = &p[strlen(p)]; // XXX
3624 /* the rest is hostname, use that to parse auth/port */
3626 /* authorization (user[:pass]@hostname) */
3627 if ((at = strchr(p, '@')) && at < ls) {
3628 av_strlcpy(authorization, p,
3629 FFMIN(authorization_size, at + 1 - p));
3630 p = at + 1; /* skip '@' */
3633 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
3635 av_strlcpy(hostname, p + 1,
3636 FFMIN(hostname_size, brk - p));
3637 if (brk[1] == ':' && port_ptr)
3638 *port_ptr = atoi(brk + 2);
3639 } else if ((col = strchr(p, ':')) && col < ls) {
3640 av_strlcpy(hostname, p,
3641 FFMIN(col + 1 - p, hostname_size));
3642 if (port_ptr) *port_ptr = atoi(col + 1);
3644 av_strlcpy(hostname, p,
3645 FFMIN(ls + 1 - p, hostname_size));
3649 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
3652 static const char hex_table_uc[16] = { '0', '1', '2', '3',
3655 'C', 'D', 'E', 'F' };
3656 static const char hex_table_lc[16] = { '0', '1', '2', '3',
3659 'c', 'd', 'e', 'f' };
3660 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
3662 for(i = 0; i < s; i++) {
3663 buff[i * 2] = hex_table[src[i] >> 4];
3664 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
3670 int ff_hex_to_data(uint8_t *data, const char *p)
3677 p += strspn(p, SPACE_CHARS);
3680 c = toupper((unsigned char) *p++);
3681 if (c >= '0' && c <= '9')
3683 else if (c >= 'A' && c <= 'F')
3698 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
3699 unsigned int pts_num, unsigned int pts_den)
3702 if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){
3703 if(new_tb.num != pts_num)
3704 av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num);
3706 av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index);
3708 if(new_tb.num <= 0 || new_tb.den <= 0) {
3709 av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index);
3712 s->time_base = new_tb;
3713 s->pts_wrap_bits = pts_wrap_bits;
3716 int ff_url_join(char *str, int size, const char *proto,
3717 const char *authorization, const char *hostname,
3718 int port, const char *fmt, ...)
3721 struct addrinfo hints, *ai;
3726 av_strlcatf(str, size, "%s://", proto);
3727 if (authorization && authorization[0])
3728 av_strlcatf(str, size, "%s@", authorization);
3729 #if CONFIG_NETWORK && defined(AF_INET6)
3730 /* Determine if hostname is a numerical IPv6 address,
3731 * properly escape it within [] in that case. */
3732 memset(&hints, 0, sizeof(hints));
3733 hints.ai_flags = AI_NUMERICHOST;
3734 if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
3735 if (ai->ai_family == AF_INET6) {
3736 av_strlcat(str, "[", size);
3737 av_strlcat(str, hostname, size);
3738 av_strlcat(str, "]", size);
3740 av_strlcat(str, hostname, size);
3745 /* Not an IPv6 address, just output the plain string. */
3746 av_strlcat(str, hostname, size);
3749 av_strlcatf(str, size, ":%d", port);
3752 int len = strlen(str);
3755 vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
3761 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
3762 AVFormatContext *src)
3767 local_pkt.stream_index = dst_stream;
3768 if (pkt->pts != AV_NOPTS_VALUE)
3769 local_pkt.pts = av_rescale_q(pkt->pts,
3770 src->streams[pkt->stream_index]->time_base,
3771 dst->streams[dst_stream]->time_base);
3772 if (pkt->dts != AV_NOPTS_VALUE)
3773 local_pkt.dts = av_rescale_q(pkt->dts,
3774 src->streams[pkt->stream_index]->time_base,
3775 dst->streams[dst_stream]->time_base);
3776 return av_write_frame(dst, &local_pkt);
3779 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
3782 const char *ptr = str;
3784 /* Parse key=value pairs. */
3787 char *dest = NULL, *dest_end;
3788 int key_len, dest_len = 0;
3790 /* Skip whitespace and potential commas. */
3791 while (*ptr && (isspace(*ptr) || *ptr == ','))
3798 if (!(ptr = strchr(key, '=')))
3801 key_len = ptr - key;
3803 callback_get_buf(context, key, key_len, &dest, &dest_len);
3804 dest_end = dest + dest_len - 1;
3808 while (*ptr && *ptr != '\"') {
3812 if (dest && dest < dest_end)
3816 if (dest && dest < dest_end)
3824 for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++)
3825 if (dest && dest < dest_end)
3833 int ff_find_stream_index(AVFormatContext *s, int id)
3836 for (i = 0; i < s->nb_streams; i++) {
3837 if (s->streams[i]->id == id)
3843 void ff_make_absolute_url(char *buf, int size, const char *base,
3847 /* Absolute path, relative to the current server */
3848 if (base && strstr(base, "://") && rel[0] == '/') {
3850 av_strlcpy(buf, base, size);
3851 sep = strstr(buf, "://");
3854 sep = strchr(sep, '/');
3858 av_strlcat(buf, rel, size);
3861 /* If rel actually is an absolute url, just copy it */
3862 if (!base || strstr(rel, "://") || rel[0] == '/') {
3863 av_strlcpy(buf, rel, size);
3867 av_strlcpy(buf, base, size);
3868 /* Remove the file name from the base url */
3869 sep = strrchr(buf, '/');
3874 while (av_strstart(rel, "../", NULL) && sep) {
3875 /* Remove the path delimiter at the end */
3877 sep = strrchr(buf, '/');
3878 /* If the next directory name to pop off is "..", break here */
3879 if (!strcmp(sep ? &sep[1] : buf, "..")) {
3880 /* Readd the slash we just removed */
3881 av_strlcat(buf, "/", size);
3884 /* Cut off the directory name */
3891 av_strlcat(buf, rel, size);
3894 int64_t ff_iso8601_to_unix_time(const char *datestr)
3897 struct tm time = {0};
3898 strptime(datestr, "%Y - %m - %dT%T", &time);
3899 return mktime(&time);
3901 av_log(NULL, AV_LOG_WARNING, "strptime() unavailable on this system, cannot convert "
3902 "the date string.\n");
3907 int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
3910 if (ofmt->query_codec)
3911 return ofmt->query_codec(codec_id, std_compliance);
3912 else if (ofmt->codec_tag)
3913 return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
3914 else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec ||
3915 codec_id == ofmt->subtitle_codec)
3918 return AVERROR_PATCHWELCOME;