2 * various utility functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/parseutils.h"
33 #include "libavutil/pixfmt.h"
34 #include "libavutil/thread.h"
35 #include "libavutil/time.h"
36 #include "libavutil/timestamp.h"
38 #include "libavcodec/bytestream.h"
39 #include "libavcodec/internal.h"
40 #include "libavcodec/raw.h"
43 #include "avio_internal.h"
51 #include "libavutil/ffversion.h"
52 const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
54 static AVMutex avformat_mutex = AV_MUTEX_INITIALIZER;
58 * various utility functions for use within FFmpeg
61 unsigned avformat_version(void)
63 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
64 return LIBAVFORMAT_VERSION_INT;
67 const char *avformat_configuration(void)
69 return FFMPEG_CONFIGURATION;
72 const char *avformat_license(void)
74 #define LICENSE_PREFIX "libavformat license: "
75 return &LICENSE_PREFIX FFMPEG_LICENSE[sizeof(LICENSE_PREFIX) - 1];
78 int ff_lock_avformat(void)
80 return ff_mutex_lock(&avformat_mutex) ? -1 : 0;
83 int ff_unlock_avformat(void)
85 return ff_mutex_unlock(&avformat_mutex) ? -1 : 0;
88 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
90 static int is_relative(int64_t ts) {
91 return ts > (RELATIVE_TS_BASE - (1LL<<48));
95 * Wrap a given time stamp, if there is an indication for an overflow
98 * @param timestamp the time stamp to wrap
99 * @return resulting time stamp
101 static int64_t wrap_timestamp(const AVStream *st, int64_t timestamp)
103 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
104 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
105 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
106 timestamp < st->pts_wrap_reference)
107 return timestamp + (1ULL << st->pts_wrap_bits);
108 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
109 timestamp >= st->pts_wrap_reference)
110 return timestamp - (1ULL << st->pts_wrap_bits);
115 #if FF_API_FORMAT_GET_SET
116 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
117 #if FF_API_LAVF_FFSERVER
118 FF_DISABLE_DEPRECATION_WARNINGS
119 MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration)
120 FF_ENABLE_DEPRECATION_WARNINGS
122 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
123 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
124 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
125 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, data_codec)
126 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
127 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
128 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
129 #if FF_API_OLD_OPEN_CALLBACKS
130 FF_DISABLE_DEPRECATION_WARNINGS
131 MAKE_ACCESSORS(AVFormatContext, format, AVOpenCallback, open_cb)
132 FF_ENABLE_DEPRECATION_WARNINGS
136 int64_t av_stream_get_end_pts(const AVStream *st)
138 if (st->internal->priv_pts) {
139 return st->internal->priv_pts->val;
141 return AV_NOPTS_VALUE;
144 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
149 void av_format_inject_global_side_data(AVFormatContext *s)
152 s->internal->inject_global_side_data = 1;
153 for (i = 0; i < s->nb_streams; i++) {
154 AVStream *st = s->streams[i];
155 st->inject_global_side_data = 1;
159 int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
161 av_assert0(!dst->codec_whitelist &&
162 !dst->format_whitelist &&
163 !dst->protocol_whitelist &&
164 !dst->protocol_blacklist);
165 dst-> codec_whitelist = av_strdup(src->codec_whitelist);
166 dst->format_whitelist = av_strdup(src->format_whitelist);
167 dst->protocol_whitelist = av_strdup(src->protocol_whitelist);
168 dst->protocol_blacklist = av_strdup(src->protocol_blacklist);
169 if ( (src-> codec_whitelist && !dst-> codec_whitelist)
170 || (src-> format_whitelist && !dst-> format_whitelist)
171 || (src->protocol_whitelist && !dst->protocol_whitelist)
172 || (src->protocol_blacklist && !dst->protocol_blacklist)) {
173 av_log(dst, AV_LOG_ERROR, "Failed to duplicate black/whitelist\n");
174 return AVERROR(ENOMEM);
179 static const AVCodec *find_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
181 #if FF_API_LAVF_AVCTX
182 FF_DISABLE_DEPRECATION_WARNINGS
183 if (st->codec->codec)
184 return st->codec->codec;
185 FF_ENABLE_DEPRECATION_WARNINGS
188 switch (st->codecpar->codec_type) {
189 case AVMEDIA_TYPE_VIDEO:
190 if (s->video_codec) return s->video_codec;
192 case AVMEDIA_TYPE_AUDIO:
193 if (s->audio_codec) return s->audio_codec;
195 case AVMEDIA_TYPE_SUBTITLE:
196 if (s->subtitle_codec) return s->subtitle_codec;
200 return avcodec_find_decoder(codec_id);
203 static const AVCodec *find_probe_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
205 const AVCodec *codec;
207 #if CONFIG_H264_DECODER
208 /* Other parts of the code assume this decoder to be used for h264,
209 * so force it if possible. */
210 if (codec_id == AV_CODEC_ID_H264)
211 return avcodec_find_decoder_by_name("h264");
214 codec = find_decoder(s, st, codec_id);
218 if (codec->capabilities & AV_CODEC_CAP_AVOID_PROBING) {
219 const AVCodec *probe_codec = NULL;
221 while ((probe_codec = av_codec_iterate(&iter))) {
222 if (probe_codec->id == codec_id &&
223 av_codec_is_decoder(probe_codec) &&
224 !(probe_codec->capabilities & (AV_CODEC_CAP_AVOID_PROBING | AV_CODEC_CAP_EXPERIMENTAL))) {
233 #if FF_API_FORMAT_GET_SET
234 int av_format_get_probe_score(const AVFormatContext *s)
236 return s->probe_score;
240 /* an arbitrarily chosen "sane" max packet size -- 50M */
241 #define SANE_CHUNK_SIZE (50000000)
243 int ffio_limit(AVIOContext *s, int size)
245 if (s->maxsize>= 0) {
246 int64_t remaining= s->maxsize - avio_tell(s);
247 if (remaining < size) {
248 int64_t newsize = avio_size(s);
249 if (!s->maxsize || s->maxsize<newsize)
250 s->maxsize = newsize - !newsize;
251 remaining= s->maxsize - avio_tell(s);
252 remaining= FFMAX(remaining, 0);
255 if (s->maxsize>= 0 && remaining+1 < size) {
256 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
263 /* Read the data in sane-sized chunks and append to pkt.
264 * Return the number of bytes read or an error. */
265 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
267 int orig_size = pkt->size;
271 int prev_size = pkt->size;
274 /* When the caller requests a lot of data, limit it to the amount
275 * left in file or SANE_CHUNK_SIZE when it is not known. */
277 if (read_size > SANE_CHUNK_SIZE/10) {
278 read_size = ffio_limit(s, read_size);
279 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
281 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
284 ret = av_grow_packet(pkt, read_size);
288 ret = avio_read(s, pkt->data + prev_size, read_size);
289 if (ret != read_size) {
290 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
297 pkt->flags |= AV_PKT_FLAG_CORRUPT;
300 av_packet_unref(pkt);
301 return pkt->size > orig_size ? pkt->size - orig_size : ret;
304 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
309 pkt->pos = avio_tell(s);
311 return append_packet_chunked(s, pkt, size);
314 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
317 return av_get_packet(s, pkt, size);
318 return append_packet_chunked(s, pkt, size);
321 int av_filename_number_test(const char *filename)
325 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
328 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
331 static const struct {
334 enum AVMediaType type;
336 { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
337 { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
338 { "aptx", AV_CODEC_ID_APTX, AVMEDIA_TYPE_AUDIO },
339 { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
340 { "dvbsub", AV_CODEC_ID_DVB_SUBTITLE,AVMEDIA_TYPE_SUBTITLE },
341 { "dvbtxt", AV_CODEC_ID_DVB_TELETEXT,AVMEDIA_TYPE_SUBTITLE },
342 { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
343 { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
344 { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
345 { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
346 { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
347 { "mjpeg_2000",AV_CODEC_ID_JPEG2000, AVMEDIA_TYPE_VIDEO },
348 { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
349 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
350 { "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
354 const AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
358 av_log(s, AV_LOG_DEBUG,
359 "Probe with size=%d, packets=%d detected %s with score=%d\n",
360 pd->buf_size, s->max_probe_packets - st->probe_packets,
362 for (i = 0; fmt_id_type[i].name; i++) {
363 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
364 if (fmt_id_type[i].type != AVMEDIA_TYPE_AUDIO &&
365 st->codecpar->sample_rate)
367 if (st->request_probe > score &&
368 st->codecpar->codec_id != fmt_id_type[i].id)
370 st->codecpar->codec_id = fmt_id_type[i].id;
371 st->codecpar->codec_type = fmt_id_type[i].type;
372 st->internal->need_context_update = 1;
373 #if FF_API_LAVF_AVCTX
374 FF_DISABLE_DEPRECATION_WARNINGS
375 st->codec->codec_type = st->codecpar->codec_type;
376 st->codec->codec_id = st->codecpar->codec_id;
377 FF_ENABLE_DEPRECATION_WARNINGS
386 /************************************************************/
387 /* input media file */
389 int av_demuxer_open(AVFormatContext *ic) {
392 if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) {
393 av_log(ic, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", ic->format_whitelist);
394 return AVERROR(EINVAL);
397 if (ic->iformat->read_header) {
398 err = ic->iformat->read_header(ic);
403 if (ic->pb && !ic->internal->data_offset)
404 ic->internal->data_offset = avio_tell(ic->pb);
409 /* Open input file and probe the format if necessary. */
410 static int init_input(AVFormatContext *s, const char *filename,
411 AVDictionary **options)
414 AVProbeData pd = { filename, NULL, 0 };
415 int score = AVPROBE_SCORE_RETRY;
418 s->flags |= AVFMT_FLAG_CUSTOM_IO;
420 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
421 s, 0, s->format_probesize);
422 else if (s->iformat->flags & AVFMT_NOFILE)
423 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
424 "will be ignored with AVFMT_NOFILE format.\n");
428 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
429 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
432 if ((ret = s->io_open(s, &s->pb, filename, AVIO_FLAG_READ | s->avio_flags, options)) < 0)
437 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
438 s, 0, s->format_probesize);
441 int ff_packet_list_put(AVPacketList **packet_buffer,
442 AVPacketList **plast_pktl,
443 AVPacket *pkt, int flags)
445 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
449 return AVERROR(ENOMEM);
451 if (flags & FF_PACKETLIST_FLAG_REF_PACKET) {
452 if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
457 ret = av_packet_make_refcounted(pkt);
462 av_packet_move_ref(&pktl->pkt, pkt);
466 (*plast_pktl)->next = pktl;
468 *packet_buffer = pktl;
470 /* Add the packet in the buffered packet list. */
475 int avformat_queue_attached_pictures(AVFormatContext *s)
478 for (i = 0; i < s->nb_streams; i++)
479 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
480 s->streams[i]->discard < AVDISCARD_ALL) {
481 if (s->streams[i]->attached_pic.size <= 0) {
482 av_log(s, AV_LOG_WARNING,
483 "Attached picture on stream %d has invalid size, "
488 ret = ff_packet_list_put(&s->internal->raw_packet_buffer,
489 &s->internal->raw_packet_buffer_end,
490 &s->streams[i]->attached_pic,
491 FF_PACKETLIST_FLAG_REF_PACKET);
498 static int update_stream_avctx(AVFormatContext *s)
501 for (i = 0; i < s->nb_streams; i++) {
502 AVStream *st = s->streams[i];
504 if (!st->internal->need_context_update)
507 /* close parser, because it depends on the codec */
508 if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
509 av_parser_close(st->parser);
513 /* update internal codec context, for the parser */
514 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
518 #if FF_API_LAVF_AVCTX
519 FF_DISABLE_DEPRECATION_WARNINGS
520 /* update deprecated public codec context */
521 ret = avcodec_parameters_to_context(st->codec, st->codecpar);
524 FF_ENABLE_DEPRECATION_WARNINGS
527 st->internal->need_context_update = 0;
533 int avformat_open_input(AVFormatContext **ps, const char *filename,
534 ff_const59 AVInputFormat *fmt, AVDictionary **options)
536 AVFormatContext *s = *ps;
538 AVDictionary *tmp = NULL;
539 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
541 if (!s && !(s = avformat_alloc_context()))
542 return AVERROR(ENOMEM);
544 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
545 return AVERROR(EINVAL);
551 av_dict_copy(&tmp, *options, 0);
553 if (s->pb) // must be before any goto fail
554 s->flags |= AVFMT_FLAG_CUSTOM_IO;
556 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
559 if (!(s->url = av_strdup(filename ? filename : ""))) {
560 ret = AVERROR(ENOMEM);
564 #if FF_API_FORMAT_FILENAME
565 FF_DISABLE_DEPRECATION_WARNINGS
566 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
567 FF_ENABLE_DEPRECATION_WARNINGS
569 if ((ret = init_input(s, filename, &tmp)) < 0)
571 s->probe_score = ret;
573 if (!s->protocol_whitelist && s->pb && s->pb->protocol_whitelist) {
574 s->protocol_whitelist = av_strdup(s->pb->protocol_whitelist);
575 if (!s->protocol_whitelist) {
576 ret = AVERROR(ENOMEM);
581 if (!s->protocol_blacklist && s->pb && s->pb->protocol_blacklist) {
582 s->protocol_blacklist = av_strdup(s->pb->protocol_blacklist);
583 if (!s->protocol_blacklist) {
584 ret = AVERROR(ENOMEM);
589 if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
590 av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist);
591 ret = AVERROR(EINVAL);
595 avio_skip(s->pb, s->skip_initial_bytes);
597 /* Check filename in case an image number is expected. */
598 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
599 if (!av_filename_number_test(filename)) {
600 ret = AVERROR(EINVAL);
605 s->duration = s->start_time = AV_NOPTS_VALUE;
607 /* Allocate private data. */
608 if (s->iformat->priv_data_size > 0) {
609 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
610 ret = AVERROR(ENOMEM);
613 if (s->iformat->priv_class) {
614 *(const AVClass **) s->priv_data = s->iformat->priv_class;
615 av_opt_set_defaults(s->priv_data);
616 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
621 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
623 ff_id3v2_read_dict(s->pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
626 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
627 if ((ret = s->iformat->read_header(s)) < 0)
631 s->metadata = s->internal->id3v2_meta;
632 s->internal->id3v2_meta = NULL;
633 } else if (s->internal->id3v2_meta) {
634 av_log(s, AV_LOG_WARNING, "Discarding ID3 tags because more suitable tags were found.\n");
635 av_dict_free(&s->internal->id3v2_meta);
638 if (id3v2_extra_meta) {
639 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
640 !strcmp(s->iformat->name, "tta") || !strcmp(s->iformat->name, "wav")) {
641 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
643 if ((ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0)
645 if ((ret = ff_id3v2_parse_priv(s, &id3v2_extra_meta)) < 0)
648 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
650 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
652 if ((ret = avformat_queue_attached_pictures(s)) < 0)
655 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->internal->data_offset)
656 s->internal->data_offset = avio_tell(s->pb);
658 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
660 update_stream_avctx(s);
662 for (i = 0; i < s->nb_streams; i++)
663 s->streams[i]->internal->orig_codec_id = s->streams[i]->codecpar->codec_id;
666 av_dict_free(options);
673 if (s->iformat->read_close)
674 s->iformat->read_close(s);
676 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
678 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
680 avformat_free_context(s);
685 /*******************************************************/
687 static void force_codec_ids(AVFormatContext *s, AVStream *st)
689 switch (st->codecpar->codec_type) {
690 case AVMEDIA_TYPE_VIDEO:
691 if (s->video_codec_id)
692 st->codecpar->codec_id = s->video_codec_id;
694 case AVMEDIA_TYPE_AUDIO:
695 if (s->audio_codec_id)
696 st->codecpar->codec_id = s->audio_codec_id;
698 case AVMEDIA_TYPE_SUBTITLE:
699 if (s->subtitle_codec_id)
700 st->codecpar->codec_id = s->subtitle_codec_id;
702 case AVMEDIA_TYPE_DATA:
703 if (s->data_codec_id)
704 st->codecpar->codec_id = s->data_codec_id;
709 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
711 if (st->request_probe>0) {
712 AVProbeData *pd = &st->probe_data;
714 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
718 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
720 av_log(s, AV_LOG_WARNING,
721 "Failed to reallocate probe buffer for stream %d\n",
726 memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
727 pd->buf_size += pkt->size;
728 memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
731 st->probe_packets = 0;
733 av_log(s, AV_LOG_WARNING,
734 "nothing to probe for stream %d\n", st->index);
738 end= s->internal->raw_packet_buffer_remaining_size <= 0
739 || st->probe_packets<= 0;
741 if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
742 int score = set_codec_from_probe_data(s, st, pd);
743 if ( (st->codecpar->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY)
747 st->request_probe = -1;
748 if (st->codecpar->codec_id != AV_CODEC_ID_NONE) {
749 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
751 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
753 force_codec_ids(s, st);
759 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
761 int64_t ref = pkt->dts;
762 int i, pts_wrap_behavior;
763 int64_t pts_wrap_reference;
764 AVProgram *first_program;
766 if (ref == AV_NOPTS_VALUE)
768 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
770 ref &= (1LL << st->pts_wrap_bits)-1;
772 // reference time stamp should be 60 s before first time stamp
773 pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
774 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
775 pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
776 (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
777 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
779 first_program = av_find_program_from_stream(s, NULL, stream_index);
781 if (!first_program) {
782 int default_stream_index = av_find_default_stream_index(s);
783 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
784 for (i = 0; i < s->nb_streams; i++) {
785 if (av_find_program_from_stream(s, NULL, i))
787 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
788 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
792 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
793 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
797 AVProgram *program = first_program;
799 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
800 pts_wrap_reference = program->pts_wrap_reference;
801 pts_wrap_behavior = program->pts_wrap_behavior;
804 program = av_find_program_from_stream(s, program, stream_index);
807 // update every program with differing pts_wrap_reference
808 program = first_program;
810 if (program->pts_wrap_reference != pts_wrap_reference) {
811 for (i = 0; i<program->nb_stream_indexes; i++) {
812 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
813 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
816 program->pts_wrap_reference = pts_wrap_reference;
817 program->pts_wrap_behavior = pts_wrap_behavior;
819 program = av_find_program_from_stream(s, program, stream_index);
825 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
835 AVPacketList *pktl = s->internal->raw_packet_buffer;
836 const AVPacket *pkt1;
839 st = s->streams[pktl->pkt.stream_index];
840 if (s->internal->raw_packet_buffer_remaining_size <= 0)
841 if ((err = probe_codec(s, st, NULL)) < 0)
843 if (st->request_probe <= 0) {
844 ff_packet_list_get(&s->internal->raw_packet_buffer,
845 &s->internal->raw_packet_buffer_end, pkt);
846 s->internal->raw_packet_buffer_remaining_size += pkt->size;
851 ret = s->iformat->read_packet(s, pkt);
853 av_packet_unref(pkt);
855 /* Some demuxers return FFERROR_REDO when they consume
856 data and discard it (ignored streams, junk, extradata).
857 We must re-call the demuxer to get the real packet. */
858 if (ret == FFERROR_REDO)
860 if (!pktl || ret == AVERROR(EAGAIN))
862 for (i = 0; i < s->nb_streams; i++) {
864 if (st->probe_packets || st->request_probe > 0)
865 if ((err = probe_codec(s, st, NULL)) < 0)
867 av_assert0(st->request_probe <= 0);
872 err = av_packet_make_refcounted(pkt);
874 av_packet_unref(pkt);
878 if (pkt->flags & AV_PKT_FLAG_CORRUPT) {
879 av_log(s, AV_LOG_WARNING,
880 "Packet corrupt (stream = %d, dts = %s)",
881 pkt->stream_index, av_ts2str(pkt->dts));
882 if (s->flags & AVFMT_FLAG_DISCARD_CORRUPT) {
883 av_log(s, AV_LOG_WARNING, ", dropping it.\n");
884 av_packet_unref(pkt);
887 av_log(s, AV_LOG_WARNING, ".\n");
890 av_assert0(pkt->stream_index < (unsigned)s->nb_streams &&
891 "Invalid stream index.\n");
893 st = s->streams[pkt->stream_index];
895 if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
896 // correct first time stamps to negative values
897 if (!is_relative(st->first_dts))
898 st->first_dts = wrap_timestamp(st, st->first_dts);
899 if (!is_relative(st->start_time))
900 st->start_time = wrap_timestamp(st, st->start_time);
901 if (!is_relative(st->cur_dts))
902 st->cur_dts = wrap_timestamp(st, st->cur_dts);
905 pkt->dts = wrap_timestamp(st, pkt->dts);
906 pkt->pts = wrap_timestamp(st, pkt->pts);
908 force_codec_ids(s, st);
910 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
911 if (s->use_wallclock_as_timestamps)
912 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
914 if (!pktl && st->request_probe <= 0)
917 err = ff_packet_list_put(&s->internal->raw_packet_buffer,
918 &s->internal->raw_packet_buffer_end,
921 av_packet_unref(pkt);
924 pkt1 = &s->internal->raw_packet_buffer_end->pkt;
925 s->internal->raw_packet_buffer_remaining_size -= pkt1->size;
927 if ((err = probe_codec(s, st, pkt1)) < 0)
933 /**********************************************************/
935 static int determinable_frame_size(AVCodecContext *avctx)
937 switch(avctx->codec_id) {
938 case AV_CODEC_ID_MP1:
939 case AV_CODEC_ID_MP2:
940 case AV_CODEC_ID_MP3:
941 case AV_CODEC_ID_CODEC2:
949 * Return the frame duration in seconds. Return 0 if not available.
951 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
952 AVCodecParserContext *pc, AVPacket *pkt)
954 AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
955 av_mul_q(av_inv_q(st->internal->avctx->time_base), (AVRational){1, st->internal->avctx->ticks_per_frame});
956 int frame_size, sample_rate;
958 #if FF_API_LAVF_AVCTX
959 FF_DISABLE_DEPRECATION_WARNINGS
960 if ((!codec_framerate.den || !codec_framerate.num) && st->codec->time_base.den && st->codec->time_base.num)
961 codec_framerate = av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
962 FF_ENABLE_DEPRECATION_WARNINGS
967 switch (st->codecpar->codec_type) {
968 case AVMEDIA_TYPE_VIDEO:
969 if (st->r_frame_rate.num && !pc && s->iformat) {
970 *pnum = st->r_frame_rate.den;
971 *pden = st->r_frame_rate.num;
972 } else if (st->time_base.num * 1000LL > st->time_base.den) {
973 *pnum = st->time_base.num;
974 *pden = st->time_base.den;
975 } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
976 av_assert0(st->internal->avctx->ticks_per_frame);
977 av_reduce(pnum, pden,
979 codec_framerate.num * (int64_t)st->internal->avctx->ticks_per_frame,
982 if (pc && pc->repeat_pict) {
983 av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
984 av_reduce(pnum, pden,
985 (*pnum) * (1LL + pc->repeat_pict),
989 /* If this codec can be interlaced or progressive then we need
990 * a parser to compute duration of a packet. Thus if we have
991 * no parser in such case leave duration undefined. */
992 if (st->internal->avctx->ticks_per_frame > 1 && !pc)
996 case AVMEDIA_TYPE_AUDIO:
997 if (st->internal->avctx_inited) {
998 frame_size = av_get_audio_frame_duration(st->internal->avctx, pkt->size);
999 sample_rate = st->internal->avctx->sample_rate;
1001 frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
1002 sample_rate = st->codecpar->sample_rate;
1004 if (frame_size <= 0 || sample_rate <= 0)
1007 *pden = sample_rate;
1014 static int is_intra_only(enum AVCodecID id)
1016 const AVCodecDescriptor *d = avcodec_descriptor_get(id);
1019 if ((d->type == AVMEDIA_TYPE_VIDEO || d->type == AVMEDIA_TYPE_AUDIO) &&
1020 !(d->props & AV_CODEC_PROP_INTRA_ONLY))
1025 static int has_decode_delay_been_guessed(AVStream *st)
1027 if (st->codecpar->codec_id != AV_CODEC_ID_H264) return 1;
1028 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
1030 #if CONFIG_H264_DECODER
1031 if (st->internal->avctx->has_b_frames &&
1032 avpriv_h264_has_num_reorder_frames(st->internal->avctx) == st->internal->avctx->has_b_frames)
1035 if (st->internal->avctx->has_b_frames<3)
1036 return st->nb_decoded_frames >= 7;
1037 else if (st->internal->avctx->has_b_frames<4)
1038 return st->nb_decoded_frames >= 18;
1040 return st->nb_decoded_frames >= 20;
1043 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
1047 if (pktl == s->internal->packet_buffer_end)
1048 return s->internal->parse_queue;
1052 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
1053 int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1054 st->codecpar->codec_id != AV_CODEC_ID_HEVC;
1057 int delay = st->internal->avctx->has_b_frames;
1060 if (dts == AV_NOPTS_VALUE) {
1061 int64_t best_score = INT64_MAX;
1062 for (i = 0; i<delay; i++) {
1063 if (st->pts_reorder_error_count[i]) {
1064 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
1065 if (score < best_score) {
1067 dts = pts_buffer[i];
1072 for (i = 0; i<delay; i++) {
1073 if (pts_buffer[i] != AV_NOPTS_VALUE) {
1074 int64_t diff = FFABS(pts_buffer[i] - dts)
1075 + (uint64_t)st->pts_reorder_error[i];
1076 diff = FFMAX(diff, st->pts_reorder_error[i]);
1077 st->pts_reorder_error[i] = diff;
1078 st->pts_reorder_error_count[i]++;
1079 if (st->pts_reorder_error_count[i] > 250) {
1080 st->pts_reorder_error[i] >>= 1;
1081 st->pts_reorder_error_count[i] >>= 1;
1088 if (dts == AV_NOPTS_VALUE)
1089 dts = pts_buffer[0];
1095 * Updates the dts of packets of a stream in pkt_buffer, by re-ordering the pts
1096 * of the packets in a window.
1098 static void update_dts_from_pts(AVFormatContext *s, int stream_index,
1099 AVPacketList *pkt_buffer)
1101 AVStream *st = s->streams[stream_index];
1102 int delay = st->internal->avctx->has_b_frames;
1105 int64_t pts_buffer[MAX_REORDER_DELAY+1];
1107 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
1108 pts_buffer[i] = AV_NOPTS_VALUE;
1110 for (; pkt_buffer; pkt_buffer = get_next_pkt(s, st, pkt_buffer)) {
1111 if (pkt_buffer->pkt.stream_index != stream_index)
1114 if (pkt_buffer->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1115 pts_buffer[0] = pkt_buffer->pkt.pts;
1116 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
1117 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
1119 pkt_buffer->pkt.dts = select_from_pts_buffer(st, pts_buffer, pkt_buffer->pkt.dts);
1124 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
1125 int64_t dts, int64_t pts, AVPacket *pkt)
1127 AVStream *st = s->streams[stream_index];
1128 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1129 AVPacketList *pktl_it;
1133 if (st->first_dts != AV_NOPTS_VALUE ||
1134 dts == AV_NOPTS_VALUE ||
1135 st->cur_dts == AV_NOPTS_VALUE ||
1136 st->cur_dts < INT_MIN + RELATIVE_TS_BASE ||
1140 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
1142 shift = (uint64_t)st->first_dts - RELATIVE_TS_BASE;
1144 if (is_relative(pts))
1147 for (pktl_it = pktl; pktl_it; pktl_it = get_next_pkt(s, st, pktl_it)) {
1148 if (pktl_it->pkt.stream_index != stream_index)
1150 if (is_relative(pktl_it->pkt.pts))
1151 pktl_it->pkt.pts += shift;
1153 if (is_relative(pktl_it->pkt.dts))
1154 pktl_it->pkt.dts += shift;
1156 if (st->start_time == AV_NOPTS_VALUE && pktl_it->pkt.pts != AV_NOPTS_VALUE) {
1157 st->start_time = pktl_it->pkt.pts;
1158 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate)
1159 st->start_time += av_rescale_q(st->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
1163 if (has_decode_delay_been_guessed(st)) {
1164 update_dts_from_pts(s, stream_index, pktl);
1167 if (st->start_time == AV_NOPTS_VALUE) {
1168 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || !(pkt->flags & AV_PKT_FLAG_DISCARD)) {
1169 st->start_time = pts;
1171 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->codecpar->sample_rate)
1172 st->start_time += av_rescale_q(st->skip_samples, (AVRational){1, st->codecpar->sample_rate}, st->time_base);
1176 static void update_initial_durations(AVFormatContext *s, AVStream *st,
1177 int stream_index, int duration)
1179 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1180 int64_t cur_dts = RELATIVE_TS_BASE;
1182 if (st->first_dts != AV_NOPTS_VALUE) {
1183 if (st->update_initial_durations_done)
1185 st->update_initial_durations_done = 1;
1186 cur_dts = st->first_dts;
1187 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1188 if (pktl->pkt.stream_index == stream_index) {
1189 if (pktl->pkt.pts != pktl->pkt.dts ||
1190 pktl->pkt.dts != AV_NOPTS_VALUE ||
1193 cur_dts -= duration;
1196 if (pktl && pktl->pkt.dts != st->first_dts) {
1197 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %"PRId64") in the queue\n",
1198 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1202 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1205 pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1206 st->first_dts = cur_dts;
1207 } else if (st->cur_dts != RELATIVE_TS_BASE)
1210 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1211 if (pktl->pkt.stream_index != stream_index)
1213 if ((pktl->pkt.pts == pktl->pkt.dts ||
1214 pktl->pkt.pts == AV_NOPTS_VALUE) &&
1215 (pktl->pkt.dts == AV_NOPTS_VALUE ||
1216 pktl->pkt.dts == st->first_dts ||
1217 pktl->pkt.dts == RELATIVE_TS_BASE) &&
1218 !pktl->pkt.duration) {
1219 pktl->pkt.dts = cur_dts;
1220 if (!st->internal->avctx->has_b_frames)
1221 pktl->pkt.pts = cur_dts;
1222 // if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1223 pktl->pkt.duration = duration;
1226 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1229 st->cur_dts = cur_dts;
1232 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1233 AVCodecParserContext *pc, AVPacket *pkt,
1234 int64_t next_dts, int64_t next_pts)
1236 int num, den, presentation_delayed, delay, i;
1238 AVRational duration;
1239 int onein_oneout = st->codecpar->codec_id != AV_CODEC_ID_H264 &&
1240 st->codecpar->codec_id != AV_CODEC_ID_HEVC;
1242 if (s->flags & AVFMT_FLAG_NOFILLIN)
1245 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1246 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
1247 if (st->last_dts_for_order_check <= pkt->dts) {
1250 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
1251 "DTS %"PRIi64" < %"PRIi64" out of order\n",
1253 st->last_dts_for_order_check);
1254 st->dts_misordered++;
1256 if (st->dts_ordered + st->dts_misordered > 250) {
1257 st->dts_ordered >>= 1;
1258 st->dts_misordered >>= 1;
1262 st->last_dts_for_order_check = pkt->dts;
1263 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1264 pkt->dts = AV_NOPTS_VALUE;
1267 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1268 pkt->dts = AV_NOPTS_VALUE;
1270 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1271 && !st->internal->avctx->has_b_frames)
1272 //FIXME Set low_delay = 0 when has_b_frames = 1
1273 st->internal->avctx->has_b_frames = 1;
1275 /* do we have a video B-frame ? */
1276 delay = st->internal->avctx->has_b_frames;
1277 presentation_delayed = 0;
1279 /* XXX: need has_b_frame, but cannot get it if the codec is
1280 * not initialized */
1282 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1283 presentation_delayed = 1;
1285 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1286 st->pts_wrap_bits < 63 &&
1287 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1288 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1289 pkt->dts -= 1LL << st->pts_wrap_bits;
1291 pkt->pts += 1LL << st->pts_wrap_bits;
1294 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1295 * We take the conservative approach and discard both.
1296 * Note: If this is misbehaving for an H.264 file, then possibly
1297 * presentation_delayed is not set correctly. */
1298 if (delay == 1 && pkt->dts == pkt->pts &&
1299 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1300 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1301 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1302 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1303 pkt->dts = AV_NOPTS_VALUE;
1306 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1307 if (pkt->duration <= 0) {
1308 ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1310 duration = (AVRational) {num, den};
1311 pkt->duration = av_rescale_rnd(1,
1312 num * (int64_t) st->time_base.den,
1313 den * (int64_t) st->time_base.num,
1318 if (pkt->duration > 0 && (s->internal->packet_buffer || s->internal->parse_queue))
1319 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1321 /* Correct timestamps with byte offset if demuxers only have timestamps
1322 * on packet boundaries */
1323 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1324 /* this will estimate bitrate based on this frame's duration and size */
1325 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1326 if (pkt->pts != AV_NOPTS_VALUE)
1328 if (pkt->dts != AV_NOPTS_VALUE)
1332 /* This may be redundant, but it should not hurt. */
1333 if (pkt->dts != AV_NOPTS_VALUE &&
1334 pkt->pts != AV_NOPTS_VALUE &&
1335 pkt->pts > pkt->dts)
1336 presentation_delayed = 1;
1338 if (s->debug & FF_FDEBUG_TS)
1339 av_log(s, AV_LOG_DEBUG,
1340 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%"PRId64" delay:%d onein_oneout:%d\n",
1341 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1342 pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1344 /* Interpolate PTS and DTS if they are not present. We skip H264
1345 * currently because delay and has_b_frames are not reliably set. */
1346 if ((delay == 0 || (delay == 1 && pc)) &&
1348 if (presentation_delayed) {
1349 /* DTS = decompression timestamp */
1350 /* PTS = presentation timestamp */
1351 if (pkt->dts == AV_NOPTS_VALUE)
1352 pkt->dts = st->last_IP_pts;
1353 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1354 if (pkt->dts == AV_NOPTS_VALUE)
1355 pkt->dts = st->cur_dts;
1357 /* This is tricky: the dts must be incremented by the duration
1358 * of the frame we are displaying, i.e. the last I- or P-frame. */
1359 if (st->last_IP_duration == 0 && (uint64_t)pkt->duration <= INT32_MAX)
1360 st->last_IP_duration = pkt->duration;
1361 if (pkt->dts != AV_NOPTS_VALUE)
1362 st->cur_dts = pkt->dts + st->last_IP_duration;
1363 if (pkt->dts != AV_NOPTS_VALUE &&
1364 pkt->pts == AV_NOPTS_VALUE &&
1365 st->last_IP_duration > 0 &&
1366 ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1367 next_dts != next_pts &&
1368 next_pts != AV_NOPTS_VALUE)
1369 pkt->pts = next_dts;
1371 if ((uint64_t)pkt->duration <= INT32_MAX)
1372 st->last_IP_duration = pkt->duration;
1373 st->last_IP_pts = pkt->pts;
1374 /* Cannot compute PTS if not present (we can compute it only
1375 * by knowing the future. */
1376 } else if (pkt->pts != AV_NOPTS_VALUE ||
1377 pkt->dts != AV_NOPTS_VALUE ||
1378 pkt->duration > 0 ) {
1380 /* presentation is not delayed : PTS and DTS are the same */
1381 if (pkt->pts == AV_NOPTS_VALUE)
1382 pkt->pts = pkt->dts;
1383 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1385 if (pkt->pts == AV_NOPTS_VALUE)
1386 pkt->pts = st->cur_dts;
1387 pkt->dts = pkt->pts;
1388 if (pkt->pts != AV_NOPTS_VALUE && duration.num >= 0)
1389 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1393 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
1394 st->pts_buffer[0] = pkt->pts;
1395 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1396 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1398 if(has_decode_delay_been_guessed(st))
1399 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1401 // We skipped it above so we try here.
1403 // This should happen on the first packet
1404 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1405 if (pkt->dts > st->cur_dts)
1406 st->cur_dts = pkt->dts;
1408 if (s->debug & FF_FDEBUG_TS)
1409 av_log(s, AV_LOG_DEBUG, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s st:%d (%d)\n",
1410 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), st->index, st->id);
1413 if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA || is_intra_only(st->codecpar->codec_id))
1414 pkt->flags |= AV_PKT_FLAG_KEY;
1415 #if FF_API_CONVERGENCE_DURATION
1416 FF_DISABLE_DEPRECATION_WARNINGS
1418 pkt->convergence_duration = pc->convergence_duration;
1419 FF_ENABLE_DEPRECATION_WARNINGS
1423 void ff_packet_list_free(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1425 AVPacketList *tmp = *pkt_buf;
1428 AVPacketList *pktl = tmp;
1430 av_packet_unref(&pktl->pkt);
1434 *pkt_buf_end = NULL;
1438 * Parse a packet, add all split parts to parse_queue.
1440 * @param pkt Packet to parse; must not be NULL.
1441 * @param flush Indicates whether to flush. If set, pkt must be blank.
1443 static int parse_packet(AVFormatContext *s, AVPacket *pkt,
1444 int stream_index, int flush)
1447 AVStream *st = s->streams[stream_index];
1448 uint8_t *data = pkt->data;
1449 int size = pkt->size;
1450 int ret = 0, got_output = flush;
1452 if (size || flush) {
1453 av_init_packet(&out_pkt);
1454 } else if (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1455 // preserve 0-size sync packets
1456 compute_pkt_fields(s, st, st->parser, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1459 while (size > 0 || (flush && got_output)) {
1461 int64_t next_pts = pkt->pts;
1462 int64_t next_dts = pkt->dts;
1464 len = av_parser_parse2(st->parser, st->internal->avctx,
1465 &out_pkt.data, &out_pkt.size, data, size,
1466 pkt->pts, pkt->dts, pkt->pos);
1468 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1470 /* increment read pointer */
1474 got_output = !!out_pkt.size;
1479 if (pkt->buf && out_pkt.data == pkt->data) {
1480 /* reference pkt->buf only when out_pkt.data is guaranteed to point
1481 * to data in it and not in the parser's internal buffer. */
1482 /* XXX: Ensure this is the case with all parsers when st->parser->flags
1483 * is PARSER_FLAG_COMPLETE_FRAMES and check for that instead? */
1484 out_pkt.buf = av_buffer_ref(pkt->buf);
1486 ret = AVERROR(ENOMEM);
1490 ret = av_packet_make_refcounted(&out_pkt);
1495 if (pkt->side_data) {
1496 out_pkt.side_data = pkt->side_data;
1497 out_pkt.side_data_elems = pkt->side_data_elems;
1498 pkt->side_data = NULL;
1499 pkt->side_data_elems = 0;
1502 /* set the duration */
1503 out_pkt.duration = (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->duration : 0;
1504 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1505 if (st->internal->avctx->sample_rate > 0) {
1507 av_rescale_q_rnd(st->parser->duration,
1508 (AVRational) { 1, st->internal->avctx->sample_rate },
1514 out_pkt.stream_index = st->index;
1515 out_pkt.pts = st->parser->pts;
1516 out_pkt.dts = st->parser->dts;
1517 out_pkt.pos = st->parser->pos;
1518 out_pkt.flags |= pkt->flags & AV_PKT_FLAG_DISCARD;
1520 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1521 out_pkt.pos = st->parser->frame_offset;
1523 if (st->parser->key_frame == 1 ||
1524 (st->parser->key_frame == -1 &&
1525 st->parser->pict_type == AV_PICTURE_TYPE_I))
1526 out_pkt.flags |= AV_PKT_FLAG_KEY;
1528 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1529 out_pkt.flags |= AV_PKT_FLAG_KEY;
1531 compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1533 ret = ff_packet_list_put(&s->internal->parse_queue,
1534 &s->internal->parse_queue_end,
1537 av_packet_unref(&out_pkt);
1542 /* end of the stream => close and free the parser */
1544 av_parser_close(st->parser);
1549 av_packet_unref(pkt);
1553 int ff_packet_list_get(AVPacketList **pkt_buffer,
1554 AVPacketList **pkt_buffer_end,
1558 av_assert0(*pkt_buffer);
1561 *pkt_buffer = pktl->next;
1563 *pkt_buffer_end = NULL;
1568 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1570 return av_rescale(ts, st->time_base.num * st->codecpar->sample_rate, st->time_base.den);
1573 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1575 int ret, i, got_packet = 0;
1576 AVDictionary *metadata = NULL;
1578 while (!got_packet && !s->internal->parse_queue) {
1581 /* read next packet */
1582 ret = ff_read_packet(s, pkt);
1584 if (ret == AVERROR(EAGAIN))
1586 /* flush the parsers */
1587 for (i = 0; i < s->nb_streams; i++) {
1589 if (st->parser && st->need_parsing)
1590 parse_packet(s, pkt, st->index, 1);
1592 /* all remaining packets are now in parse_queue =>
1593 * really terminate parsing */
1597 st = s->streams[pkt->stream_index];
1599 /* update context if required */
1600 if (st->internal->need_context_update) {
1601 if (avcodec_is_open(st->internal->avctx)) {
1602 av_log(s, AV_LOG_DEBUG, "Demuxer context update while decoder is open, closing and trying to re-open\n");
1603 avcodec_close(st->internal->avctx);
1604 st->info->found_decoder = 0;
1607 /* close parser, because it depends on the codec */
1608 if (st->parser && st->internal->avctx->codec_id != st->codecpar->codec_id) {
1609 av_parser_close(st->parser);
1613 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
1615 av_packet_unref(pkt);
1619 #if FF_API_LAVF_AVCTX
1620 FF_DISABLE_DEPRECATION_WARNINGS
1621 /* update deprecated public codec context */
1622 ret = avcodec_parameters_to_context(st->codec, st->codecpar);
1624 av_packet_unref(pkt);
1627 FF_ENABLE_DEPRECATION_WARNINGS
1630 st->internal->need_context_update = 0;
1633 if (pkt->pts != AV_NOPTS_VALUE &&
1634 pkt->dts != AV_NOPTS_VALUE &&
1635 pkt->pts < pkt->dts) {
1636 av_log(s, AV_LOG_WARNING,
1637 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1639 av_ts2str(pkt->pts),
1640 av_ts2str(pkt->dts),
1643 if (s->debug & FF_FDEBUG_TS)
1644 av_log(s, AV_LOG_DEBUG,
1645 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%"PRId64", flags=%d\n",
1647 av_ts2str(pkt->pts),
1648 av_ts2str(pkt->dts),
1649 pkt->size, pkt->duration, pkt->flags);
1651 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1652 st->parser = av_parser_init(st->codecpar->codec_id);
1654 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1655 "%s, packets or times may be invalid.\n",
1656 avcodec_get_name(st->codecpar->codec_id));
1657 /* no parser available: just output the raw packets */
1658 st->need_parsing = AVSTREAM_PARSE_NONE;
1659 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1660 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1661 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1662 st->parser->flags |= PARSER_FLAG_ONCE;
1663 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1664 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1667 if (!st->need_parsing || !st->parser) {
1668 /* no parsing needed: we just output the packet as is */
1669 compute_pkt_fields(s, st, NULL, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1670 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1671 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1672 ff_reduce_index(s, st->index);
1673 av_add_index_entry(st, pkt->pos, pkt->dts,
1674 0, 0, AVINDEX_KEYFRAME);
1677 } else if (st->discard < AVDISCARD_ALL) {
1678 if ((ret = parse_packet(s, pkt, pkt->stream_index, 0)) < 0)
1680 st->codecpar->sample_rate = st->internal->avctx->sample_rate;
1681 st->codecpar->bit_rate = st->internal->avctx->bit_rate;
1682 st->codecpar->channels = st->internal->avctx->channels;
1683 st->codecpar->channel_layout = st->internal->avctx->channel_layout;
1684 st->codecpar->codec_id = st->internal->avctx->codec_id;
1687 av_packet_unref(pkt);
1689 if (pkt->flags & AV_PKT_FLAG_KEY)
1690 st->skip_to_keyframe = 0;
1691 if (st->skip_to_keyframe) {
1692 av_packet_unref(pkt);
1697 if (!got_packet && s->internal->parse_queue)
1698 ret = ff_packet_list_get(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
1701 AVStream *st = s->streams[pkt->stream_index];
1702 int discard_padding = 0;
1703 if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1704 int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1705 int64_t sample = ts_to_samples(st, pts);
1706 int duration = ts_to_samples(st, pkt->duration);
1707 int64_t end_sample = sample + duration;
1708 if (duration > 0 && end_sample >= st->first_discard_sample &&
1709 sample < st->last_discard_sample)
1710 discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1712 if (st->start_skip_samples && (pkt->pts == 0 || pkt->pts == RELATIVE_TS_BASE))
1713 st->skip_samples = st->start_skip_samples;
1714 if (st->skip_samples || discard_padding) {
1715 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1717 AV_WL32(p, st->skip_samples);
1718 AV_WL32(p + 4, discard_padding);
1719 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d / discard %d\n", st->skip_samples, discard_padding);
1721 st->skip_samples = 0;
1724 if (st->inject_global_side_data) {
1725 for (i = 0; i < st->nb_side_data; i++) {
1726 AVPacketSideData *src_sd = &st->side_data[i];
1729 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1732 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1734 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1738 memcpy(dst_data, src_sd->data, src_sd->size);
1740 st->inject_global_side_data = 0;
1744 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1746 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1747 av_dict_copy(&s->metadata, metadata, 0);
1748 av_dict_free(&metadata);
1749 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1752 #if FF_API_LAVF_AVCTX
1753 update_stream_avctx(s);
1756 if (s->debug & FF_FDEBUG_TS)
1757 av_log(s, AV_LOG_DEBUG,
1758 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1759 "size=%d, duration=%"PRId64", flags=%d\n",
1761 av_ts2str(pkt->pts),
1762 av_ts2str(pkt->dts),
1763 pkt->size, pkt->duration, pkt->flags);
1765 /* A demuxer might have returned EOF because of an IO error, let's
1766 * propagate this back to the user. */
1767 if (ret == AVERROR_EOF && s->pb && s->pb->error < 0 && s->pb->error != AVERROR(EAGAIN))
1773 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1775 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1781 ret = s->internal->packet_buffer
1782 ? ff_packet_list_get(&s->internal->packet_buffer,
1783 &s->internal->packet_buffer_end, pkt)
1784 : read_frame_internal(s, pkt);
1791 AVPacketList *pktl = s->internal->packet_buffer;
1794 AVPacket *next_pkt = &pktl->pkt;
1796 if (next_pkt->dts != AV_NOPTS_VALUE) {
1797 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1798 // last dts seen for this stream. if any of packets following
1799 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1800 int64_t last_dts = next_pkt->dts;
1801 av_assert2(wrap_bits <= 64);
1802 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1803 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1804 av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2ULL << (wrap_bits - 1)) < 0) {
1805 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2ULL << (wrap_bits - 1))) {
1807 next_pkt->pts = pktl->pkt.dts;
1809 if (last_dts != AV_NOPTS_VALUE) {
1810 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1811 last_dts = pktl->pkt.dts;
1816 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1817 // Fixing the last reference frame had none pts issue (For MXF etc).
1818 // We only do this when
1820 // 2. we are not able to resolve a pts value for current packet.
1821 // 3. the packets for this stream at the end of the files had valid dts.
1822 next_pkt->pts = last_dts + next_pkt->duration;
1824 pktl = s->internal->packet_buffer;
1827 /* read packet from packet buffer, if there is data */
1828 st = s->streams[next_pkt->stream_index];
1829 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1830 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1831 ret = ff_packet_list_get(&s->internal->packet_buffer,
1832 &s->internal->packet_buffer_end, pkt);
1837 ret = read_frame_internal(s, pkt);
1839 if (pktl && ret != AVERROR(EAGAIN)) {
1846 ret = ff_packet_list_put(&s->internal->packet_buffer,
1847 &s->internal->packet_buffer_end,
1850 av_packet_unref(pkt);
1857 st = s->streams[pkt->stream_index];
1858 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1859 ff_reduce_index(s, st->index);
1860 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1863 if (is_relative(pkt->dts))
1864 pkt->dts -= RELATIVE_TS_BASE;
1865 if (is_relative(pkt->pts))
1866 pkt->pts -= RELATIVE_TS_BASE;
1871 /* XXX: suppress the packet queue */
1872 static void flush_packet_queue(AVFormatContext *s)
1876 ff_packet_list_free(&s->internal->parse_queue, &s->internal->parse_queue_end);
1877 ff_packet_list_free(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
1878 ff_packet_list_free(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
1880 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1883 /*******************************************************/
1886 int av_find_default_stream_index(AVFormatContext *s)
1890 int best_stream = 0;
1891 int best_score = INT_MIN;
1893 if (s->nb_streams <= 0)
1895 for (i = 0; i < s->nb_streams; i++) {
1898 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1899 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
1901 if (st->codecpar->width && st->codecpar->height)
1905 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1906 if (st->codecpar->sample_rate)
1909 if (st->codec_info_nb_frames)
1912 if (st->discard != AVDISCARD_ALL)
1915 if (score > best_score) {
1923 /** Flush the frame reader. */
1924 void ff_read_frame_flush(AVFormatContext *s)
1929 flush_packet_queue(s);
1931 /* Reset read state for each stream. */
1932 for (i = 0; i < s->nb_streams; i++) {
1936 av_parser_close(st->parser);
1939 st->last_IP_pts = AV_NOPTS_VALUE;
1940 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1941 if (st->first_dts == AV_NOPTS_VALUE)
1942 st->cur_dts = RELATIVE_TS_BASE;
1944 /* We set the current DTS to an unspecified origin. */
1945 st->cur_dts = AV_NOPTS_VALUE;
1947 st->probe_packets = s->max_probe_packets;
1949 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1950 st->pts_buffer[j] = AV_NOPTS_VALUE;
1952 if (s->internal->inject_global_side_data)
1953 st->inject_global_side_data = 1;
1955 st->skip_samples = 0;
1959 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1963 for (i = 0; i < s->nb_streams; i++) {
1964 AVStream *st = s->streams[i];
1967 av_rescale(timestamp,
1968 st->time_base.den * (int64_t) ref_st->time_base.num,
1969 st->time_base.num * (int64_t) ref_st->time_base.den);
1973 void ff_reduce_index(AVFormatContext *s, int stream_index)
1975 AVStream *st = s->streams[stream_index];
1976 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1978 if ((unsigned) st->nb_index_entries >= max_entries) {
1980 for (i = 0; 2 * i < st->nb_index_entries; i++)
1981 st->index_entries[i] = st->index_entries[2 * i];
1982 st->nb_index_entries = i;
1986 int ff_add_index_entry(AVIndexEntry **index_entries,
1987 int *nb_index_entries,
1988 unsigned int *index_entries_allocated_size,
1989 int64_t pos, int64_t timestamp,
1990 int size, int distance, int flags)
1992 AVIndexEntry *entries, *ie;
1995 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1998 if (timestamp == AV_NOPTS_VALUE)
1999 return AVERROR(EINVAL);
2001 if (size < 0 || size > 0x3FFFFFFF)
2002 return AVERROR(EINVAL);
2004 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
2005 timestamp -= RELATIVE_TS_BASE;
2007 entries = av_fast_realloc(*index_entries,
2008 index_entries_allocated_size,
2009 (*nb_index_entries + 1) *
2010 sizeof(AVIndexEntry));
2014 *index_entries = entries;
2016 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
2017 timestamp, AVSEEK_FLAG_ANY);
2020 index = (*nb_index_entries)++;
2021 ie = &entries[index];
2022 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
2024 ie = &entries[index];
2025 if (ie->timestamp != timestamp) {
2026 if (ie->timestamp <= timestamp)
2028 memmove(entries + index + 1, entries + index,
2029 sizeof(AVIndexEntry) * (*nb_index_entries - index));
2030 (*nb_index_entries)++;
2031 } else if (ie->pos == pos && distance < ie->min_distance)
2032 // do not reduce the distance
2033 distance = ie->min_distance;
2037 ie->timestamp = timestamp;
2038 ie->min_distance = distance;
2045 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
2046 int size, int distance, int flags)
2048 timestamp = wrap_timestamp(st, timestamp);
2049 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
2050 &st->index_entries_allocated_size, pos,
2051 timestamp, size, distance, flags);
2054 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
2055 int64_t wanted_timestamp, int flags)
2063 // Optimize appending index entries at the end.
2064 if (b && entries[b - 1].timestamp < wanted_timestamp)
2070 // Search for the next non-discarded packet.
2071 while ((entries[m].flags & AVINDEX_DISCARD_FRAME) && m < b && m < nb_entries - 1) {
2073 if (m == b && entries[m].timestamp >= wanted_timestamp) {
2079 timestamp = entries[m].timestamp;
2080 if (timestamp >= wanted_timestamp)
2082 if (timestamp <= wanted_timestamp)
2085 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
2087 if (!(flags & AVSEEK_FLAG_ANY))
2088 while (m >= 0 && m < nb_entries &&
2089 !(entries[m].flags & AVINDEX_KEYFRAME))
2090 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
2092 if (m == nb_entries)
2097 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
2100 int64_t pos_delta = 0;
2102 //We could use URLProtocol flags here but as many user applications do not use URLProtocols this would be unreliable
2103 const char *proto = avio_find_protocol_name(s->url);
2105 av_assert0(time_tolerance >= 0);
2108 av_log(s, AV_LOG_INFO,
2109 "Protocol name not provided, cannot determine if input is local or "
2110 "a network protocol, buffers and access patterns cannot be configured "
2111 "optimally without knowing the protocol\n");
2114 if (proto && !(strcmp(proto, "file") && strcmp(proto, "pipe") && strcmp(proto, "cache")))
2117 for (ist1 = 0; ist1 < s->nb_streams; ist1++) {
2118 AVStream *st1 = s->streams[ist1];
2119 for (ist2 = 0; ist2 < s->nb_streams; ist2++) {
2120 AVStream *st2 = s->streams[ist2];
2126 for (i1 = i2 = 0; i1 < st1->nb_index_entries; i1++) {
2127 AVIndexEntry *e1 = &st1->index_entries[i1];
2128 int64_t e1_pts = av_rescale_q(e1->timestamp, st1->time_base, AV_TIME_BASE_Q);
2130 skip = FFMAX(skip, e1->size);
2131 for (; i2 < st2->nb_index_entries; i2++) {
2132 AVIndexEntry *e2 = &st2->index_entries[i2];
2133 int64_t e2_pts = av_rescale_q(e2->timestamp, st2->time_base, AV_TIME_BASE_Q);
2134 if (e2_pts < e1_pts || e2_pts - (uint64_t)e1_pts < time_tolerance)
2136 pos_delta = FFMAX(pos_delta, e1->pos - e2->pos);
2144 /* XXX This could be adjusted depending on protocol*/
2145 if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
2146 av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
2148 /* realloc the buffer and the original data will be retained */
2149 if (ffio_realloc_buf(s->pb, pos_delta)) {
2150 av_log(s, AV_LOG_ERROR, "Realloc buffer fail.\n");
2154 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
2157 if (skip < (1<<23)) {
2158 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, skip);
2162 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
2164 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
2165 wanted_timestamp, flags);
2168 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
2169 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2171 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
2172 if (stream_index >= 0)
2173 ts = wrap_timestamp(s->streams[stream_index], ts);
2177 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
2178 int64_t target_ts, int flags)
2180 const AVInputFormat *avif = s->iformat;
2181 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
2182 int64_t ts_min, ts_max, ts;
2187 if (stream_index < 0)
2190 av_log(s, AV_LOG_TRACE, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2193 ts_min = AV_NOPTS_VALUE;
2194 pos_limit = -1; // GCC falsely says it may be uninitialized.
2196 st = s->streams[stream_index];
2197 if (st->index_entries) {
2200 /* FIXME: Whole function must be checked for non-keyframe entries in
2201 * index case, especially read_timestamp(). */
2202 index = av_index_search_timestamp(st, target_ts,
2203 flags | AVSEEK_FLAG_BACKWARD);
2204 index = FFMAX(index, 0);
2205 e = &st->index_entries[index];
2207 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
2209 ts_min = e->timestamp;
2210 av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
2211 pos_min, av_ts2str(ts_min));
2213 av_assert1(index == 0);
2216 index = av_index_search_timestamp(st, target_ts,
2217 flags & ~AVSEEK_FLAG_BACKWARD);
2218 av_assert0(index < st->nb_index_entries);
2220 e = &st->index_entries[index];
2221 av_assert1(e->timestamp >= target_ts);
2223 ts_max = e->timestamp;
2224 pos_limit = pos_max - e->min_distance;
2225 av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
2226 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
2230 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
2231 ts_min, ts_max, flags, &ts, avif->read_timestamp);
2236 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2239 ff_read_frame_flush(s);
2240 ff_update_cur_dts(s, st, ts);
2245 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
2246 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
2248 int64_t step = 1024;
2249 int64_t limit, ts_max;
2250 int64_t filesize = avio_size(s->pb);
2251 int64_t pos_max = filesize - 1;
2254 pos_max = FFMAX(0, (pos_max) - step);
2255 ts_max = ff_read_timestamp(s, stream_index,
2256 &pos_max, limit, read_timestamp);
2258 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
2259 if (ts_max == AV_NOPTS_VALUE)
2263 int64_t tmp_pos = pos_max + 1;
2264 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
2265 &tmp_pos, INT64_MAX, read_timestamp);
2266 if (tmp_ts == AV_NOPTS_VALUE)
2268 av_assert0(tmp_pos > pos_max);
2271 if (tmp_pos >= filesize)
2283 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
2284 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
2285 int64_t ts_min, int64_t ts_max,
2286 int flags, int64_t *ts_ret,
2287 int64_t (*read_timestamp)(struct AVFormatContext *, int,
2288 int64_t *, int64_t))
2295 av_log(s, AV_LOG_TRACE, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2297 if (ts_min == AV_NOPTS_VALUE) {
2298 pos_min = s->internal->data_offset;
2299 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2300 if (ts_min == AV_NOPTS_VALUE)
2304 if (ts_min >= target_ts) {
2309 if (ts_max == AV_NOPTS_VALUE) {
2310 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2312 pos_limit = pos_max;
2315 if (ts_max <= target_ts) {
2320 av_assert0(ts_min < ts_max);
2323 while (pos_min < pos_limit) {
2324 av_log(s, AV_LOG_TRACE,
2325 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2326 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2327 av_assert0(pos_limit <= pos_max);
2329 if (no_change == 0) {
2330 int64_t approximate_keyframe_distance = pos_max - pos_limit;
2331 // interpolate position (better than dichotomy)
2332 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2334 pos_min - approximate_keyframe_distance;
2335 } else if (no_change == 1) {
2336 // bisection if interpolation did not change min / max pos last time
2337 pos = (pos_min + pos_limit) >> 1;
2339 /* linear search if bisection failed, can only happen if there
2340 * are very few or no keyframes between min/max */
2345 else if (pos > pos_limit)
2349 // May pass pos_limit instead of -1.
2350 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2355 av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2356 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2357 pos_min, pos, pos_max,
2358 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2359 pos_limit, start_pos, no_change);
2360 if (ts == AV_NOPTS_VALUE) {
2361 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2364 if (target_ts <= ts) {
2365 pos_limit = start_pos - 1;
2369 if (target_ts >= ts) {
2375 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2376 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2379 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2381 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2382 av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2383 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2389 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2390 int64_t pos, int flags)
2392 int64_t pos_min, pos_max;
2394 pos_min = s->internal->data_offset;
2395 pos_max = avio_size(s->pb) - 1;
2399 else if (pos > pos_max)
2402 avio_seek(s->pb, pos, SEEK_SET);
2404 s->io_repositioned = 1;
2409 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2410 int64_t timestamp, int flags)
2417 st = s->streams[stream_index];
2419 index = av_index_search_timestamp(st, timestamp, flags);
2421 if (index < 0 && st->nb_index_entries &&
2422 timestamp < st->index_entries[0].timestamp)
2425 if (index < 0 || index == st->nb_index_entries - 1) {
2429 if (st->nb_index_entries) {
2430 av_assert0(st->index_entries);
2431 ie = &st->index_entries[st->nb_index_entries - 1];
2432 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2434 ff_update_cur_dts(s, st, ie->timestamp);
2436 if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
2442 read_status = av_read_frame(s, &pkt);
2443 } while (read_status == AVERROR(EAGAIN));
2444 if (read_status < 0)
2446 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2447 if (pkt.flags & AV_PKT_FLAG_KEY) {
2448 av_packet_unref(&pkt);
2451 if (nonkey++ > 1000 && st->codecpar->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2452 av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey);
2453 av_packet_unref(&pkt);
2457 av_packet_unref(&pkt);
2459 index = av_index_search_timestamp(st, timestamp, flags);
2464 ff_read_frame_flush(s);
2465 if (s->iformat->read_seek)
2466 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2468 ie = &st->index_entries[index];
2469 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2471 ff_update_cur_dts(s, st, ie->timestamp);
2476 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2477 int64_t timestamp, int flags)
2482 if (flags & AVSEEK_FLAG_BYTE) {
2483 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2485 ff_read_frame_flush(s);
2486 return seek_frame_byte(s, stream_index, timestamp, flags);
2489 if (stream_index < 0) {
2490 stream_index = av_find_default_stream_index(s);
2491 if (stream_index < 0)
2494 st = s->streams[stream_index];
2495 /* timestamp for default must be expressed in AV_TIME_BASE units */
2496 timestamp = av_rescale(timestamp, st->time_base.den,
2497 AV_TIME_BASE * (int64_t) st->time_base.num);
2500 /* first, we try the format specific seek */
2501 if (s->iformat->read_seek) {
2502 ff_read_frame_flush(s);
2503 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2509 if (s->iformat->read_timestamp &&
2510 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2511 ff_read_frame_flush(s);
2512 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2513 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2514 ff_read_frame_flush(s);
2515 return seek_frame_generic(s, stream_index, timestamp, flags);
2520 int av_seek_frame(AVFormatContext *s, int stream_index,
2521 int64_t timestamp, int flags)
2525 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2526 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2527 if ((flags & AVSEEK_FLAG_BACKWARD))
2531 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2532 flags & ~AVSEEK_FLAG_BACKWARD);
2535 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2538 ret = avformat_queue_attached_pictures(s);
2543 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2544 int64_t ts, int64_t max_ts, int flags)
2546 if (min_ts > ts || max_ts < ts)
2548 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2549 return AVERROR(EINVAL);
2552 flags |= AVSEEK_FLAG_ANY;
2553 flags &= ~AVSEEK_FLAG_BACKWARD;
2555 if (s->iformat->read_seek2) {
2557 ff_read_frame_flush(s);
2559 if (stream_index == -1 && s->nb_streams == 1) {
2560 AVRational time_base = s->streams[0]->time_base;
2561 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2562 min_ts = av_rescale_rnd(min_ts, time_base.den,
2563 time_base.num * (int64_t)AV_TIME_BASE,
2564 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2565 max_ts = av_rescale_rnd(max_ts, time_base.den,
2566 time_base.num * (int64_t)AV_TIME_BASE,
2567 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2571 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2575 ret = avformat_queue_attached_pictures(s);
2579 if (s->iformat->read_timestamp) {
2580 // try to seek via read_timestamp()
2583 // Fall back on old API if new is not implemented but old is.
2584 // Note the old API has somewhat different semantics.
2585 if (s->iformat->read_seek || 1) {
2586 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2587 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2588 if (ret<0 && ts != min_ts && max_ts != ts) {
2589 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2591 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2596 // try some generic seek like seek_frame_generic() but with new ts semantics
2597 return -1; //unreachable
2600 int avformat_flush(AVFormatContext *s)
2602 ff_read_frame_flush(s);
2606 /*******************************************************/
2609 * Return TRUE if the stream has accurate duration in any stream.
2611 * @return TRUE if the stream has accurate duration for at least one component.
2613 static int has_duration(AVFormatContext *ic)
2618 for (i = 0; i < ic->nb_streams; i++) {
2619 st = ic->streams[i];
2620 if (st->duration != AV_NOPTS_VALUE)
2623 if (ic->duration != AV_NOPTS_VALUE)
2629 * Estimate the stream timings from the one of each components.
2631 * Also computes the global bitrate if possible.
2633 static void update_stream_timings(AVFormatContext *ic)
2635 int64_t start_time, start_time1, start_time_text, end_time, end_time1, end_time_text;
2636 int64_t duration, duration1, duration_text, filesize;
2640 start_time = INT64_MAX;
2641 start_time_text = INT64_MAX;
2642 end_time = INT64_MIN;
2643 end_time_text = INT64_MIN;
2644 duration = INT64_MIN;
2645 duration_text = INT64_MIN;
2647 for (i = 0; i < ic->nb_streams; i++) {
2648 AVStream *st = ic->streams[i];
2649 int is_text = st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ||
2650 st->codecpar->codec_type == AVMEDIA_TYPE_DATA;
2651 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2652 start_time1 = av_rescale_q(st->start_time, st->time_base,
2655 start_time_text = FFMIN(start_time_text, start_time1);
2657 start_time = FFMIN(start_time, start_time1);
2658 end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
2660 AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
2661 if (end_time1 != AV_NOPTS_VALUE && (end_time1 > 0 ? start_time1 <= INT64_MAX - end_time1 : start_time1 >= INT64_MIN - end_time1)) {
2662 end_time1 += start_time1;
2664 end_time_text = FFMAX(end_time_text, end_time1);
2666 end_time = FFMAX(end_time, end_time1);
2668 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2669 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2670 p->start_time = start_time1;
2671 if (p->end_time < end_time1)
2672 p->end_time = end_time1;
2675 if (st->duration != AV_NOPTS_VALUE) {
2676 duration1 = av_rescale_q(st->duration, st->time_base,
2679 duration_text = FFMAX(duration_text, duration1);
2681 duration = FFMAX(duration, duration1);
2684 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - (uint64_t)start_time_text < AV_TIME_BASE))
2685 start_time = start_time_text;
2686 else if (start_time > start_time_text)
2687 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2689 if (end_time == INT64_MIN || (end_time < end_time_text && end_time_text - (uint64_t)end_time < AV_TIME_BASE))
2690 end_time = end_time_text;
2691 else if (end_time < end_time_text)
2692 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream endtime %f\n", end_time_text / (float)AV_TIME_BASE);
2694 if (duration == INT64_MIN || (duration < duration_text && duration_text - duration < AV_TIME_BASE))
2695 duration = duration_text;
2696 else if (duration < duration_text)
2697 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream duration %f\n", duration_text / (float)AV_TIME_BASE);
2699 if (start_time != INT64_MAX) {
2700 ic->start_time = start_time;
2701 if (end_time != INT64_MIN) {
2702 if (ic->nb_programs > 1) {
2703 for (i = 0; i < ic->nb_programs; i++) {
2704 p = ic->programs[i];
2705 if (p->start_time != AV_NOPTS_VALUE &&
2706 p->end_time > p->start_time &&
2707 p->end_time - (uint64_t)p->start_time <= INT64_MAX)
2708 duration = FFMAX(duration, p->end_time - p->start_time);
2710 } else if (end_time >= start_time && end_time - (uint64_t)start_time <= INT64_MAX) {
2711 duration = FFMAX(duration, end_time - start_time);
2715 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2716 ic->duration = duration;
2718 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration > 0) {
2719 /* compute the bitrate */
2720 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2721 (double) ic->duration;
2722 if (bitrate >= 0 && bitrate <= INT64_MAX)
2723 ic->bit_rate = bitrate;
2727 static void fill_all_stream_timings(AVFormatContext *ic)
2732 update_stream_timings(ic);
2733 for (i = 0; i < ic->nb_streams; i++) {
2734 st = ic->streams[i];
2735 if (st->start_time == AV_NOPTS_VALUE) {
2736 if (ic->start_time != AV_NOPTS_VALUE)
2737 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2739 if (ic->duration != AV_NOPTS_VALUE)
2740 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2746 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2748 int64_t filesize, duration;
2749 int i, show_warning = 0;
2752 /* if bit_rate is already set, we believe it */
2753 if (ic->bit_rate <= 0) {
2754 int64_t bit_rate = 0;
2755 for (i = 0; i < ic->nb_streams; i++) {
2756 st = ic->streams[i];
2757 if (st->codecpar->bit_rate <= 0 && st->internal->avctx->bit_rate > 0)
2758 st->codecpar->bit_rate = st->internal->avctx->bit_rate;
2759 if (st->codecpar->bit_rate > 0) {
2760 if (INT64_MAX - st->codecpar->bit_rate < bit_rate) {
2764 bit_rate += st->codecpar->bit_rate;
2765 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2766 // If we have a videostream with packets but without a bitrate
2767 // then consider the sum not known
2772 ic->bit_rate = bit_rate;
2775 /* if duration is already set, we believe it */
2776 if (ic->duration == AV_NOPTS_VALUE &&
2777 ic->bit_rate != 0) {
2778 filesize = ic->pb ? avio_size(ic->pb) : 0;
2779 if (filesize > ic->internal->data_offset) {
2780 filesize -= ic->internal->data_offset;
2781 for (i = 0; i < ic->nb_streams; i++) {
2782 st = ic->streams[i];
2783 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2784 && st->duration == AV_NOPTS_VALUE) {
2785 duration = av_rescale(8 * filesize, st->time_base.den,
2787 (int64_t) st->time_base.num);
2788 st->duration = duration;
2795 av_log(ic, AV_LOG_WARNING,
2796 "Estimating duration from bitrate, this may be inaccurate\n");
2799 #define DURATION_MAX_READ_SIZE 250000LL
2800 #define DURATION_MAX_RETRY 6
2802 /* only usable for MPEG-PS streams */
2803 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2805 AVPacket pkt1, *pkt = &pkt1;
2807 int num, den, read_size, i, ret;
2808 int found_duration = 0;
2810 int64_t filesize, offset, duration;
2813 /* flush packet queue */
2814 flush_packet_queue(ic);
2816 for (i = 0; i < ic->nb_streams; i++) {
2817 st = ic->streams[i];
2818 if (st->start_time == AV_NOPTS_VALUE &&
2819 st->first_dts == AV_NOPTS_VALUE &&
2820 st->codecpar->codec_type != AVMEDIA_TYPE_UNKNOWN)
2821 av_log(ic, AV_LOG_WARNING,
2822 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2825 av_parser_close(st->parser);
2830 if (ic->skip_estimate_duration_from_pts) {
2831 av_log(ic, AV_LOG_INFO, "Skipping duration calculation in estimate_timings_from_pts\n");
2832 goto skip_duration_calc;
2835 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2836 /* estimate the end time (duration) */
2837 /* XXX: may need to support wrapping */
2838 filesize = ic->pb ? avio_size(ic->pb) : 0;
2840 is_end = found_duration;
2841 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2845 avio_seek(ic->pb, offset, SEEK_SET);
2848 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2852 ret = ff_read_packet(ic, pkt);
2853 } while (ret == AVERROR(EAGAIN));
2856 read_size += pkt->size;
2857 st = ic->streams[pkt->stream_index];
2858 if (pkt->pts != AV_NOPTS_VALUE &&
2859 (st->start_time != AV_NOPTS_VALUE ||
2860 st->first_dts != AV_NOPTS_VALUE)) {
2861 if (pkt->duration == 0) {
2862 ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2864 pkt->duration = av_rescale_rnd(1,
2865 num * (int64_t) st->time_base.den,
2866 den * (int64_t) st->time_base.num,
2870 duration = pkt->pts + pkt->duration;
2872 if (st->start_time != AV_NOPTS_VALUE)
2873 duration -= st->start_time;
2875 duration -= st->first_dts;
2877 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2878 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2879 st->duration = duration;
2880 st->info->last_duration = duration;
2883 av_packet_unref(pkt);
2886 /* check if all audio/video streams have valid duration */
2889 for (i = 0; i < ic->nb_streams; i++) {
2890 st = ic->streams[i];
2891 switch (st->codecpar->codec_type) {
2892 case AVMEDIA_TYPE_VIDEO:
2893 case AVMEDIA_TYPE_AUDIO:
2894 if (st->duration == AV_NOPTS_VALUE)
2901 ++retry <= DURATION_MAX_RETRY);
2903 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2905 /* warn about audio/video streams which duration could not be estimated */
2906 for (i = 0; i < ic->nb_streams; i++) {
2907 st = ic->streams[i];
2908 if (st->duration == AV_NOPTS_VALUE) {
2909 switch (st->codecpar->codec_type) {
2910 case AVMEDIA_TYPE_VIDEO:
2911 case AVMEDIA_TYPE_AUDIO:
2912 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2913 av_log(ic, AV_LOG_WARNING, "stream %d : no PTS found at end of file, duration not set\n", i);
2915 av_log(ic, AV_LOG_WARNING, "stream %d : no TS found at start of file, duration not set\n", i);
2920 fill_all_stream_timings(ic);
2922 avio_seek(ic->pb, old_offset, SEEK_SET);
2923 for (i = 0; i < ic->nb_streams; i++) {
2926 st = ic->streams[i];
2927 st->cur_dts = st->first_dts;
2928 st->last_IP_pts = AV_NOPTS_VALUE;
2929 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2930 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2931 st->pts_buffer[j] = AV_NOPTS_VALUE;
2935 /* 1:1 map to AVDurationEstimationMethod */
2936 static const char *duration_name[] = {
2937 [AVFMT_DURATION_FROM_PTS] = "pts",
2938 [AVFMT_DURATION_FROM_STREAM] = "stream",
2939 [AVFMT_DURATION_FROM_BITRATE] = "bit rate",
2942 static const char *duration_estimate_name(enum AVDurationEstimationMethod method)
2944 return duration_name[method];
2947 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2951 /* get the file size, if possible */
2952 if (ic->iformat->flags & AVFMT_NOFILE) {
2955 file_size = avio_size(ic->pb);
2956 file_size = FFMAX(0, file_size);
2959 if ((!strcmp(ic->iformat->name, "mpeg") ||
2960 !strcmp(ic->iformat->name, "mpegts")) &&
2961 file_size && (ic->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2962 /* get accurate estimate from the PTSes */
2963 estimate_timings_from_pts(ic, old_offset);
2964 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2965 } else if (has_duration(ic)) {
2966 /* at least one component has timings - we use them for all
2968 fill_all_stream_timings(ic);
2969 /* nut demuxer estimate the duration from PTS */
2970 if(!strcmp(ic->iformat->name, "nut"))
2971 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2973 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2975 /* less precise: use bitrate info */
2976 estimate_timings_from_bit_rate(ic);
2977 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2979 update_stream_timings(ic);
2983 AVStream av_unused *st;
2984 for (i = 0; i < ic->nb_streams; i++) {
2985 st = ic->streams[i];
2986 if (st->time_base.den)
2987 av_log(ic, AV_LOG_TRACE, "stream %d: start_time: %0.3f duration: %0.3f\n", i,
2988 (double) st->start_time * av_q2d(st->time_base),
2989 (double) st->duration * av_q2d(st->time_base));
2991 av_log(ic, AV_LOG_TRACE,
2992 "format: start_time: %0.3f duration: %0.3f (estimate from %s) bitrate=%"PRId64" kb/s\n",
2993 (double) ic->start_time / AV_TIME_BASE,
2994 (double) ic->duration / AV_TIME_BASE,
2995 duration_estimate_name(ic->duration_estimation_method),
2996 (int64_t)ic->bit_rate / 1000);
3000 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
3002 AVCodecContext *avctx = st->internal->avctx;
3004 #define FAIL(errmsg) do { \
3006 *errmsg_ptr = errmsg; \
3010 if ( avctx->codec_id == AV_CODEC_ID_NONE
3011 && avctx->codec_type != AVMEDIA_TYPE_DATA)
3012 FAIL("unknown codec");
3013 switch (avctx->codec_type) {
3014 case AVMEDIA_TYPE_AUDIO:
3015 if (!avctx->frame_size && determinable_frame_size(avctx))
3016 FAIL("unspecified frame size");
3017 if (st->info->found_decoder >= 0 &&
3018 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
3019 FAIL("unspecified sample format");
3020 if (!avctx->sample_rate)
3021 FAIL("unspecified sample rate");
3022 if (!avctx->channels)
3023 FAIL("unspecified number of channels");
3024 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
3025 FAIL("no decodable DTS frames");
3027 case AVMEDIA_TYPE_VIDEO:
3029 FAIL("unspecified size");
3030 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
3031 FAIL("unspecified pixel format");
3032 if (st->codecpar->codec_id == AV_CODEC_ID_RV30 || st->codecpar->codec_id == AV_CODEC_ID_RV40)
3033 if (!st->sample_aspect_ratio.num && !st->codecpar->sample_aspect_ratio.num && !st->codec_info_nb_frames)
3034 FAIL("no frame in rv30/40 and no sar");
3036 case AVMEDIA_TYPE_SUBTITLE:
3037 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
3038 FAIL("unspecified size");
3040 case AVMEDIA_TYPE_DATA:
3041 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
3047 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
3048 static int try_decode_frame(AVFormatContext *s, AVStream *st,
3049 const AVPacket *avpkt, AVDictionary **options)
3051 AVCodecContext *avctx = st->internal->avctx;
3052 const AVCodec *codec;
3053 int got_picture = 1, ret = 0;
3054 AVFrame *frame = av_frame_alloc();
3055 AVSubtitle subtitle;
3056 AVPacket pkt = *avpkt;
3057 int do_skip_frame = 0;
3058 enum AVDiscard skip_frame;
3061 return AVERROR(ENOMEM);
3063 if (!avcodec_is_open(avctx) &&
3064 st->info->found_decoder <= 0 &&
3065 (st->codecpar->codec_id != -st->info->found_decoder || !st->codecpar->codec_id)) {
3066 AVDictionary *thread_opt = NULL;
3068 codec = find_probe_decoder(s, st, st->codecpar->codec_id);
3071 st->info->found_decoder = -st->codecpar->codec_id;
3076 /* Force thread count to 1 since the H.264 decoder will not extract
3077 * SPS and PPS to extradata during multi-threaded decoding. */
3078 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
3079 if (s->codec_whitelist)
3080 av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
3081 ret = avcodec_open2(avctx, codec, options ? options : &thread_opt);
3083 av_dict_free(&thread_opt);
3085 st->info->found_decoder = -avctx->codec_id;
3088 st->info->found_decoder = 1;
3089 } else if (!st->info->found_decoder)
3090 st->info->found_decoder = 1;
3092 if (st->info->found_decoder < 0) {
3097 if (avpriv_codec_get_cap_skip_frame_fill_param(avctx->codec)) {
3099 skip_frame = avctx->skip_frame;
3100 avctx->skip_frame = AVDISCARD_ALL;
3103 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
3105 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
3106 (!st->codec_info_nb_frames &&
3107 (avctx->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)))) {
3109 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
3110 avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
3111 ret = avcodec_send_packet(avctx, &pkt);
3112 if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3116 ret = avcodec_receive_frame(avctx, frame);
3119 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
3121 } else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3122 ret = avcodec_decode_subtitle2(avctx, &subtitle,
3123 &got_picture, &pkt);
3125 avsubtitle_free(&subtitle);
3131 st->nb_decoded_frames++;
3136 if (!pkt.data && !got_picture)
3140 if (do_skip_frame) {
3141 avctx->skip_frame = skip_frame;
3144 av_frame_free(&frame);
3148 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
3150 while (tags->id != AV_CODEC_ID_NONE) {
3158 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
3161 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3162 if (tag == tags[i].tag)
3164 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
3165 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
3167 return AV_CODEC_ID_NONE;
3170 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
3172 if (bps <= 0 || bps > 64)
3173 return AV_CODEC_ID_NONE;
3178 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
3180 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
3182 return AV_CODEC_ID_NONE;
3187 if (sflags & (1 << (bps - 1))) {
3190 return AV_CODEC_ID_PCM_S8;
3192 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
3194 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
3196 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
3198 return be ? AV_CODEC_ID_PCM_S64BE : AV_CODEC_ID_PCM_S64LE;
3200 return AV_CODEC_ID_NONE;
3205 return AV_CODEC_ID_PCM_U8;
3207 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
3209 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
3211 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
3213 return AV_CODEC_ID_NONE;
3219 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
3222 if (!av_codec_get_tag2(tags, id, &tag))
3227 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
3231 for (i = 0; tags && tags[i]; i++) {
3232 const AVCodecTag *codec_tags = tags[i];
3233 while (codec_tags->id != AV_CODEC_ID_NONE) {
3234 if (codec_tags->id == id) {
3235 *tag = codec_tags->tag;
3244 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
3247 for (i = 0; tags && tags[i]; i++) {
3248 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
3249 if (id != AV_CODEC_ID_NONE)
3252 return AV_CODEC_ID_NONE;
3255 static void compute_chapters_end(AVFormatContext *s)
3258 int64_t max_time = 0;
3260 if (s->duration > 0 && s->start_time < INT64_MAX - s->duration)
3261 max_time = s->duration +
3262 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
3264 for (i = 0; i < s->nb_chapters; i++)
3265 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
3266 AVChapter *ch = s->chapters[i];
3267 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
3271 for (j = 0; j < s->nb_chapters; j++) {
3272 AVChapter *ch1 = s->chapters[j];
3273 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
3275 if (j != i && next_start > ch->start && next_start < end)
3278 ch->end = (end == INT64_MAX || end < ch->start) ? ch->start : end;
3282 static int get_std_framerate(int i)
3285 return (i + 1) * 1001;
3289 return (i + 31) * 1001 * 12;
3293 return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
3297 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
3300 /* Is the time base unreliable?
3301 * This is a heuristic to balance between quick acceptance of the values in
3302 * the headers vs. some extra checks.
3303 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
3304 * MPEG-2 commonly misuses field repeat flags to store different framerates.
3305 * And there are "variable" fps files this needs to detect as well. */
3306 static int tb_unreliable(AVCodecContext *c)
3308 if (c->time_base.den >= 101LL * c->time_base.num ||
3309 c->time_base.den < 5LL * c->time_base.num ||
3310 // c->codec_tag == AV_RL32("DIVX") ||
3311 // c->codec_tag == AV_RL32("XVID") ||
3312 c->codec_tag == AV_RL32("mp4v") ||
3313 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
3314 c->codec_id == AV_CODEC_ID_GIF ||
3315 c->codec_id == AV_CODEC_ID_HEVC ||
3316 c->codec_id == AV_CODEC_ID_H264)
3321 int ff_alloc_extradata(AVCodecParameters *par, int size)
3323 av_freep(&par->extradata);
3324 par->extradata_size = 0;
3326 if (size < 0 || size >= INT32_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
3327 return AVERROR(EINVAL);
3329 par->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
3330 if (!par->extradata)
3331 return AVERROR(ENOMEM);
3333 memset(par->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3334 par->extradata_size = size;
3339 int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
3341 int ret = ff_alloc_extradata(par, size);
3344 ret = avio_read(pb, par->extradata, size);
3346 av_freep(&par->extradata);
3347 par->extradata_size = 0;
3348 av_log(s, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
3349 return ret < 0 ? ret : AVERROR_INVALIDDATA;
3355 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
3358 int64_t last = st->info->last_dts;
3360 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
3361 && ts - (uint64_t)last < INT64_MAX) {
3362 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
3363 int64_t duration = ts - last;
3365 if (!st->info->duration_error)
3366 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
3367 if (!st->info->duration_error)
3368 return AVERROR(ENOMEM);
3370 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3371 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
3372 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3373 if (st->info->duration_error[0][1][i] < 1e10) {
3374 int framerate = get_std_framerate(i);
3375 double sdts = dts*framerate/(1001*12);
3376 for (j= 0; j<2; j++) {
3377 int64_t ticks = llrint(sdts+j*0.5);
3378 double error= sdts - ticks + j*0.5;
3379 st->info->duration_error[j][0][i] += error;
3380 st->info->duration_error[j][1][i] += error*error;
3384 if (st->info->rfps_duration_sum <= INT64_MAX - duration) {
3385 st->info->duration_count++;
3386 st->info->rfps_duration_sum += duration;
3389 if (st->info->duration_count % 10 == 0) {
3390 int n = st->info->duration_count;
3391 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3392 if (st->info->duration_error[0][1][i] < 1e10) {
3393 double a0 = st->info->duration_error[0][0][i] / n;
3394 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
3395 double a1 = st->info->duration_error[1][0][i] / n;
3396 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
3397 if (error0 > 0.04 && error1 > 0.04) {
3398 st->info->duration_error[0][1][i] = 2e10;
3399 st->info->duration_error[1][1][i] = 2e10;
3405 // ignore the first 4 values, they might have some random jitter
3406 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
3407 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
3409 if (ts != AV_NOPTS_VALUE)
3410 st->info->last_dts = ts;
3415 void ff_rfps_calculate(AVFormatContext *ic)
3419 for (i = 0; i < ic->nb_streams; i++) {
3420 AVStream *st = ic->streams[i];
3422 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
3424 // the check for tb_unreliable() is not completely correct, since this is not about handling
3425 // an unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
3426 // ipmovie.c produces.
3427 if (tb_unreliable(st->internal->avctx) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num)
3428 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);
3429 if (st->info->duration_count>1 && !st->r_frame_rate.num
3430 && tb_unreliable(st->internal->avctx)) {
3432 double best_error= 0.01;
3433 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
3435 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
3438 if (st->info->codec_info_duration &&
3439 st->info->codec_info_duration*av_q2d(st->time_base) < (1001*11.5)/get_std_framerate(j))
3441 if (!st->info->codec_info_duration && get_std_framerate(j) < 1001*12)
3444 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
3447 for (k= 0; k<2; k++) {
3448 int n = st->info->duration_count;
3449 double a= st->info->duration_error[k][0][j] / n;
3450 double error= st->info->duration_error[k][1][j]/n - a*a;
3452 if (error < best_error && best_error> 0.000000001) {
3454 num = get_std_framerate(j);
3457 av_log(ic, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3460 // do not increase frame rate by more than 1 % in order to match a standard rate.
3461 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
3462 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3464 if ( !st->avg_frame_rate.num
3465 && st->r_frame_rate.num && st->info->rfps_duration_sum
3466 && st->info->codec_info_duration <= 0
3467 && st->info->duration_count > 2
3468 && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0
3470 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
3471 st->avg_frame_rate = st->r_frame_rate;
3474 av_freep(&st->info->duration_error);
3475 st->info->last_dts = AV_NOPTS_VALUE;
3476 st->info->duration_count = 0;
3477 st->info->rfps_duration_sum = 0;
3481 static int extract_extradata_check(AVStream *st)
3483 const AVBitStreamFilter *f;
3485 f = av_bsf_get_by_name("extract_extradata");
3490 const enum AVCodecID *ids;
3491 for (ids = f->codec_ids; *ids != AV_CODEC_ID_NONE; ids++)
3492 if (*ids == st->codecpar->codec_id)
3499 static int extract_extradata_init(AVStream *st)
3501 AVStreamInternal *sti = st->internal;
3502 const AVBitStreamFilter *f;
3505 f = av_bsf_get_by_name("extract_extradata");
3509 /* check that the codec id is supported */
3510 ret = extract_extradata_check(st);
3514 sti->extract_extradata.pkt = av_packet_alloc();
3515 if (!sti->extract_extradata.pkt)
3516 return AVERROR(ENOMEM);
3518 ret = av_bsf_alloc(f, &sti->extract_extradata.bsf);
3522 ret = avcodec_parameters_copy(sti->extract_extradata.bsf->par_in,
3527 sti->extract_extradata.bsf->time_base_in = st->time_base;
3529 ret = av_bsf_init(sti->extract_extradata.bsf);
3534 sti->extract_extradata.inited = 1;
3538 av_bsf_free(&sti->extract_extradata.bsf);
3539 av_packet_free(&sti->extract_extradata.pkt);
3543 static int extract_extradata(AVStream *st, const AVPacket *pkt)
3545 AVStreamInternal *sti = st->internal;
3549 if (!sti->extract_extradata.inited) {
3550 ret = extract_extradata_init(st);
3555 if (sti->extract_extradata.inited && !sti->extract_extradata.bsf)
3558 pkt_ref = sti->extract_extradata.pkt;
3559 ret = av_packet_ref(pkt_ref, pkt);
3563 ret = av_bsf_send_packet(sti->extract_extradata.bsf, pkt_ref);
3565 av_packet_unref(pkt_ref);
3569 while (ret >= 0 && !sti->avctx->extradata) {
3573 ret = av_bsf_receive_packet(sti->extract_extradata.bsf, pkt_ref);
3575 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
3580 extradata = av_packet_get_side_data(pkt_ref, AV_PKT_DATA_NEW_EXTRADATA,
3584 av_assert0(!sti->avctx->extradata);
3585 if ((unsigned)extradata_size < FF_MAX_EXTRADATA_SIZE)
3586 sti->avctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
3587 if (!sti->avctx->extradata) {
3588 av_packet_unref(pkt_ref);
3589 return AVERROR(ENOMEM);
3591 memcpy(sti->avctx->extradata, extradata, extradata_size);
3592 sti->avctx->extradata_size = extradata_size;
3594 av_packet_unref(pkt_ref);
3600 static int add_coded_side_data(AVStream *st, AVCodecContext *avctx)
3604 for (i = 0; i < avctx->nb_coded_side_data; i++) {
3605 const AVPacketSideData *sd_src = &avctx->coded_side_data[i];
3607 dst_data = av_stream_new_side_data(st, sd_src->type, sd_src->size);
3609 return AVERROR(ENOMEM);
3610 memcpy(dst_data, sd_src->data, sd_src->size);
3615 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
3617 int i, count = 0, ret = 0, j;
3620 AVCodecContext *avctx;
3622 int64_t old_offset = avio_tell(ic->pb);
3623 // new streams might appear, no options for those
3624 int orig_nb_streams = ic->nb_streams;
3626 int64_t max_analyze_duration = ic->max_analyze_duration;
3627 int64_t max_stream_analyze_duration;
3628 int64_t max_subtitle_analyze_duration;
3629 int64_t probesize = ic->probesize;
3630 int eof_reached = 0;
3631 int *missing_streams = av_opt_ptr(ic->iformat->priv_class, ic->priv_data, "missing_streams");
3633 flush_codecs = probesize > 0;
3635 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
3637 max_stream_analyze_duration = max_analyze_duration;
3638 max_subtitle_analyze_duration = max_analyze_duration;
3639 if (!max_analyze_duration) {
3640 max_stream_analyze_duration =
3641 max_analyze_duration = 5*AV_TIME_BASE;
3642 max_subtitle_analyze_duration = 30*AV_TIME_BASE;
3643 if (!strcmp(ic->iformat->name, "flv"))
3644 max_stream_analyze_duration = 90*AV_TIME_BASE;
3645 if (!strcmp(ic->iformat->name, "mpeg") || !strcmp(ic->iformat->name, "mpegts"))
3646 max_stream_analyze_duration = 7*AV_TIME_BASE;
3650 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d nb_streams:%d\n",
3651 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, ic->nb_streams);
3653 for (i = 0; i < ic->nb_streams; i++) {
3654 const AVCodec *codec;
3655 AVDictionary *thread_opt = NULL;
3656 st = ic->streams[i];
3657 avctx = st->internal->avctx;
3659 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
3660 st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3661 /* if (!st->time_base.num)
3663 if (!avctx->time_base.num)
3664 avctx->time_base = st->time_base;
3667 /* check if the caller has overridden the codec id */
3668 #if FF_API_LAVF_AVCTX
3669 FF_DISABLE_DEPRECATION_WARNINGS
3670 if (st->codec->codec_id != st->internal->orig_codec_id) {
3671 st->codecpar->codec_id = st->codec->codec_id;
3672 st->codecpar->codec_type = st->codec->codec_type;
3673 st->internal->orig_codec_id = st->codec->codec_id;
3675 FF_ENABLE_DEPRECATION_WARNINGS
3677 // only for the split stuff
3678 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE) && st->request_probe <= 0) {
3679 st->parser = av_parser_init(st->codecpar->codec_id);
3681 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3682 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3683 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3684 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3686 } else if (st->need_parsing) {
3687 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3688 "%s, packets or times may be invalid.\n",
3689 avcodec_get_name(st->codecpar->codec_id));
3693 if (st->codecpar->codec_id != st->internal->orig_codec_id)
3694 st->internal->orig_codec_id = st->codecpar->codec_id;
3696 ret = avcodec_parameters_to_context(avctx, st->codecpar);
3698 goto find_stream_info_err;
3699 if (st->request_probe <= 0)
3700 st->internal->avctx_inited = 1;
3702 codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3704 /* Force thread count to 1 since the H.264 decoder will not extract
3705 * SPS and PPS to extradata during multi-threaded decoding. */
3706 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3708 if (ic->codec_whitelist)
3709 av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0);
3711 /* Ensure that subtitle_header is properly set. */
3712 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE
3713 && codec && !avctx->codec) {
3714 if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3715 av_log(ic, AV_LOG_WARNING,
3716 "Failed to open codec in %s\n",__FUNCTION__);
3719 // Try to just open decoders, in case this is enough to get parameters.
3720 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3721 if (codec && !avctx->codec)
3722 if (avcodec_open2(avctx, codec, options ? &options[i] : &thread_opt) < 0)
3723 av_log(ic, AV_LOG_WARNING,
3724 "Failed to open codec in %s\n",__FUNCTION__);
3727 av_dict_free(&thread_opt);
3730 for (i = 0; i < ic->nb_streams; i++) {
3731 #if FF_API_R_FRAME_RATE
3732 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3734 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3735 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3740 const AVPacket *pkt;
3741 int analyzed_all_streams;
3742 if (ff_check_interrupt(&ic->interrupt_callback)) {
3744 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3748 /* check if one codec still needs to be handled */
3749 for (i = 0; i < ic->nb_streams; i++) {
3750 int fps_analyze_framecount = 20;
3753 st = ic->streams[i];
3754 if (!has_codec_parameters(st, NULL))
3756 /* If the timebase is coarse (like the usual millisecond precision
3757 * of mkv), we need to analyze more frames to reliably arrive at
3758 * the correct fps. */
3759 if (av_q2d(st->time_base) > 0.0005)
3760 fps_analyze_framecount *= 2;
3761 if (!tb_unreliable(st->internal->avctx))
3762 fps_analyze_framecount = 0;
3763 if (ic->fps_probe_size >= 0)
3764 fps_analyze_framecount = ic->fps_probe_size;
3765 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3766 fps_analyze_framecount = 0;
3767 /* variable fps and no guess at the real fps */
3768 count = (ic->iformat->flags & AVFMT_NOTIMESTAMPS) ?
3769 st->info->codec_info_duration_fields/2 :
3770 st->info->duration_count;
3771 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3772 st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3773 if (count < fps_analyze_framecount)
3776 // Look at the first 3 frames if there is evidence of frame delay
3777 // but the decoder delay is not set.
3778 if (st->info->frame_delay_evidence && count < 2 && st->internal->avctx->has_b_frames == 0)
3780 if (!st->internal->avctx->extradata &&
3781 (!st->internal->extract_extradata.inited ||
3782 st->internal->extract_extradata.bsf) &&
3783 extract_extradata_check(st))
3785 if (st->first_dts == AV_NOPTS_VALUE &&
3786 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3787 st->codec_info_nb_frames < ((st->disposition & AV_DISPOSITION_ATTACHED_PIC) ? 1 : ic->max_ts_probe) &&
3788 (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
3789 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))
3792 analyzed_all_streams = 0;
3793 if (!missing_streams || !*missing_streams)
3794 if (i == ic->nb_streams) {
3795 analyzed_all_streams = 1;
3796 /* NOTE: If the format has no header, then we need to read some
3797 * packets to get most of the streams, so we cannot stop here. */
3798 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3799 /* If we found the info for all the codecs, we can stop. */
3801 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3806 /* We did not get all the codec info, but we read too much data. */
3807 if (read_size >= probesize) {
3809 av_log(ic, AV_LOG_DEBUG,
3810 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3811 for (i = 0; i < ic->nb_streams; i++)
3812 if (!ic->streams[i]->r_frame_rate.num &&
3813 ic->streams[i]->info->duration_count <= 1 &&
3814 ic->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
3815 strcmp(ic->iformat->name, "image2"))
3816 av_log(ic, AV_LOG_WARNING,
3817 "Stream #%d: not enough frames to estimate rate; "
3818 "consider increasing probesize\n", i);
3822 /* NOTE: A new stream can be added there if no header in file
3823 * (AVFMTCTX_NOHEADER). */
3824 ret = read_frame_internal(ic, &pkt1);
3825 if (ret == AVERROR(EAGAIN))
3834 if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
3835 ret = ff_packet_list_put(&ic->internal->packet_buffer,
3836 &ic->internal->packet_buffer_end,
3839 goto unref_then_goto_end;
3841 pkt = &ic->internal->packet_buffer_end->pkt;
3846 st = ic->streams[pkt->stream_index];
3847 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3848 read_size += pkt->size;
3850 avctx = st->internal->avctx;
3851 if (!st->internal->avctx_inited) {
3852 ret = avcodec_parameters_to_context(avctx, st->codecpar);
3854 goto unref_then_goto_end;
3855 st->internal->avctx_inited = 1;
3858 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3859 /* check for non-increasing dts */
3860 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3861 st->info->fps_last_dts >= pkt->dts) {
3862 av_log(ic, AV_LOG_DEBUG,
3863 "Non-increasing DTS in stream %d: packet %d with DTS "
3864 "%"PRId64", packet %d with DTS %"PRId64"\n",
3865 st->index, st->info->fps_last_dts_idx,
3866 st->info->fps_last_dts, st->codec_info_nb_frames,
3868 st->info->fps_first_dts =
3869 st->info->fps_last_dts = AV_NOPTS_VALUE;
3871 /* Check for a discontinuity in dts. If the difference in dts
3872 * is more than 1000 times the average packet duration in the
3873 * sequence, we treat it as a discontinuity. */
3874 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3875 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3876 (pkt->dts - (uint64_t)st->info->fps_last_dts) / 1000 >
3877 (st->info->fps_last_dts - (uint64_t)st->info->fps_first_dts) /
3878 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3879 av_log(ic, AV_LOG_WARNING,
3880 "DTS discontinuity in stream %d: packet %d with DTS "
3881 "%"PRId64", packet %d with DTS %"PRId64"\n",
3882 st->index, st->info->fps_last_dts_idx,
3883 st->info->fps_last_dts, st->codec_info_nb_frames,
3885 st->info->fps_first_dts =
3886 st->info->fps_last_dts = AV_NOPTS_VALUE;
3889 /* update stored dts values */
3890 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3891 st->info->fps_first_dts = pkt->dts;
3892 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3894 st->info->fps_last_dts = pkt->dts;
3895 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3897 if (st->codec_info_nb_frames>1) {
3901 if (st->time_base.den > 0)
3902 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3903 if (st->avg_frame_rate.num > 0)
3904 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3907 && st->codec_info_nb_frames>30
3908 && st->info->fps_first_dts != AV_NOPTS_VALUE
3909 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3910 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3912 if (analyzed_all_streams) limit = max_analyze_duration;
3913 else if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE) limit = max_subtitle_analyze_duration;
3914 else limit = max_stream_analyze_duration;
3917 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds st:%d\n",
3919 t, pkt->stream_index);
3920 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3921 av_packet_unref(&pkt1);
3924 if (pkt->duration) {
3925 if (avctx->codec_type == AVMEDIA_TYPE_SUBTITLE && pkt->pts != AV_NOPTS_VALUE && st->start_time != AV_NOPTS_VALUE && pkt->pts >= st->start_time) {
3926 st->info->codec_info_duration = FFMIN(pkt->pts - st->start_time, st->info->codec_info_duration + pkt->duration);
3928 st->info->codec_info_duration += pkt->duration;
3929 st->info->codec_info_duration_fields += st->parser && st->need_parsing && avctx->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3932 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
3933 #if FF_API_R_FRAME_RATE
3934 ff_rfps_add_frame(ic, st, pkt->dts);
3936 if (pkt->dts != pkt->pts && pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
3937 st->info->frame_delay_evidence = 1;
3939 if (!st->internal->avctx->extradata) {
3940 ret = extract_extradata(st, pkt);
3942 goto unref_then_goto_end;
3945 /* If still no information, we try to open the codec and to
3946 * decompress the frame. We try to avoid that in most cases as
3947 * it takes longer and uses more memory. For MPEG-4, we need to
3948 * decompress for QuickTime.
3950 * If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3951 * least one frame of codec data, this makes sure the codec initializes
3952 * the channel configuration and does not only trust the values from
3954 try_decode_frame(ic, st, pkt,
3955 (options && i < orig_nb_streams) ? &options[i] : NULL);
3957 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3958 av_packet_unref(&pkt1);
3960 st->codec_info_nb_frames++;
3966 for (stream_index = 0; stream_index < ic->nb_streams; stream_index++) {
3967 st = ic->streams[stream_index];
3968 avctx = st->internal->avctx;
3969 if (!has_codec_parameters(st, NULL)) {
3970 const AVCodec *codec = find_probe_decoder(ic, st, st->codecpar->codec_id);
3971 if (codec && !avctx->codec) {
3972 AVDictionary *opts = NULL;
3973 if (ic->codec_whitelist)
3974 av_dict_set(&opts, "codec_whitelist", ic->codec_whitelist, 0);
3975 if (avcodec_open2(avctx, codec, (options && stream_index < orig_nb_streams) ? &options[stream_index] : &opts) < 0)
3976 av_log(ic, AV_LOG_WARNING,
3977 "Failed to open codec in %s\n",__FUNCTION__);
3978 av_dict_free(&opts);
3982 // EOF already reached while reading the stream above.
3983 // So continue with reoordering DTS with whatever delay we have.
3984 if (ic->internal->packet_buffer && !has_decode_delay_been_guessed(st)) {
3985 update_dts_from_pts(ic, stream_index, ic->internal->packet_buffer);
3991 AVPacket empty_pkt = { 0 };
3993 av_init_packet(&empty_pkt);
3995 for (i = 0; i < ic->nb_streams; i++) {
3997 st = ic->streams[i];
3999 /* flush the decoders */
4000 if (st->info->found_decoder == 1) {
4002 err = try_decode_frame(ic, st, &empty_pkt,
4003 (options && i < orig_nb_streams)
4004 ? &options[i] : NULL);
4005 } while (err > 0 && !has_codec_parameters(st, NULL));
4008 av_log(ic, AV_LOG_INFO,
4009 "decoding for stream %d failed\n", st->index);
4015 ff_rfps_calculate(ic);
4017 for (i = 0; i < ic->nb_streams; i++) {
4018 st = ic->streams[i];
4019 avctx = st->internal->avctx;
4020 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
4021 if (avctx->codec_id == AV_CODEC_ID_RAWVIDEO && !avctx->codec_tag && !avctx->bits_per_coded_sample) {
4022 uint32_t tag= avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
4023 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == avctx->pix_fmt)
4024 avctx->codec_tag= tag;
4027 /* estimate average framerate if not set by demuxer */
4028 if (st->info->codec_info_duration_fields &&
4029 !st->avg_frame_rate.num &&
4030 st->info->codec_info_duration) {
4032 double best_error = 0.01;
4033 AVRational codec_frame_rate = avctx->framerate;
4035 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
4036 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
4037 st->info->codec_info_duration < 0)
4039 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
4040 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
4041 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
4043 /* Round guessed framerate to a "standard" framerate if it's
4044 * within 1% of the original estimate. */
4045 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
4046 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
4047 double error = fabs(av_q2d(st->avg_frame_rate) /
4048 av_q2d(std_fps) - 1);
4050 if (error < best_error) {
4052 best_fps = std_fps.num;
4055 if (ic->internal->prefer_codec_framerate && codec_frame_rate.num > 0 && codec_frame_rate.den > 0) {
4056 error = fabs(av_q2d(codec_frame_rate) /
4057 av_q2d(std_fps) - 1);
4058 if (error < best_error) {
4060 best_fps = std_fps.num;
4065 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
4066 best_fps, 12 * 1001, INT_MAX);
4069 if (!st->r_frame_rate.num) {
4070 if ( avctx->time_base.den * (int64_t) st->time_base.num
4071 <= avctx->time_base.num * avctx->ticks_per_frame * (uint64_t) st->time_base.den) {
4072 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
4073 avctx->time_base.den, (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
4075 st->r_frame_rate.num = st->time_base.den;
4076 st->r_frame_rate.den = st->time_base.num;
4079 if (st->display_aspect_ratio.num && st->display_aspect_ratio.den) {
4080 AVRational hw_ratio = { avctx->height, avctx->width };
4081 st->sample_aspect_ratio = av_mul_q(st->display_aspect_ratio,
4084 } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
4085 if (!avctx->bits_per_coded_sample)
4086 avctx->bits_per_coded_sample =
4087 av_get_bits_per_sample(avctx->codec_id);
4088 // set stream disposition based on audio service type
4089 switch (avctx->audio_service_type) {
4090 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
4091 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
4093 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
4094 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
4096 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
4097 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
4099 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
4100 st->disposition = AV_DISPOSITION_COMMENT;
4102 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
4103 st->disposition = AV_DISPOSITION_KARAOKE;
4110 estimate_timings(ic, old_offset);
4112 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
4114 if (ret >= 0 && ic->nb_streams)
4115 /* We could not have all the codec parameters before EOF. */
4117 for (i = 0; i < ic->nb_streams; i++) {
4119 st = ic->streams[i];
4121 /* if no packet was ever seen, update context now for has_codec_parameters */
4122 if (!st->internal->avctx_inited) {
4123 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
4124 st->codecpar->format == AV_SAMPLE_FMT_NONE)
4125 st->codecpar->format = st->internal->avctx->sample_fmt;
4126 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
4128 goto find_stream_info_err;
4130 if (!has_codec_parameters(st, &errmsg)) {
4132 avcodec_string(buf, sizeof(buf), st->internal->avctx, 0);
4133 av_log(ic, AV_LOG_WARNING,
4134 "Could not find codec parameters for stream %d (%s): %s\n"
4135 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
4142 compute_chapters_end(ic);
4144 /* update the stream parameters from the internal codec contexts */
4145 for (i = 0; i < ic->nb_streams; i++) {
4146 st = ic->streams[i];
4148 if (st->internal->avctx_inited) {
4149 int orig_w = st->codecpar->width;
4150 int orig_h = st->codecpar->height;
4151 ret = avcodec_parameters_from_context(st->codecpar, st->internal->avctx);
4153 goto find_stream_info_err;
4154 ret = add_coded_side_data(st, st->internal->avctx);
4156 goto find_stream_info_err;
4158 // The decoder might reduce the video size by the lowres factor.
4159 if (st->internal->avctx->lowres && orig_w) {
4160 st->codecpar->width = orig_w;
4161 st->codecpar->height = orig_h;
4166 #if FF_API_LAVF_AVCTX
4167 FF_DISABLE_DEPRECATION_WARNINGS
4168 ret = avcodec_parameters_to_context(st->codec, st->codecpar);
4170 goto find_stream_info_err;
4173 // The old API (AVStream.codec) "requires" the resolution to be adjusted
4174 // by the lowres factor.
4175 if (st->internal->avctx->lowres && st->internal->avctx->width) {
4176 st->codec->lowres = st->internal->avctx->lowres;
4177 st->codec->width = st->internal->avctx->width;
4178 st->codec->height = st->internal->avctx->height;
4182 if (st->codec->codec_tag != MKTAG('t','m','c','d')) {
4183 st->codec->time_base = st->internal->avctx->time_base;
4184 st->codec->ticks_per_frame = st->internal->avctx->ticks_per_frame;
4186 st->codec->framerate = st->avg_frame_rate;
4188 if (st->internal->avctx->subtitle_header) {
4189 st->codec->subtitle_header = av_malloc(st->internal->avctx->subtitle_header_size);
4190 if (!st->codec->subtitle_header)
4191 goto find_stream_info_err;
4192 st->codec->subtitle_header_size = st->internal->avctx->subtitle_header_size;
4193 memcpy(st->codec->subtitle_header, st->internal->avctx->subtitle_header,
4194 st->codec->subtitle_header_size);
4197 // Fields unavailable in AVCodecParameters
4198 st->codec->coded_width = st->internal->avctx->coded_width;
4199 st->codec->coded_height = st->internal->avctx->coded_height;
4200 st->codec->properties = st->internal->avctx->properties;
4201 FF_ENABLE_DEPRECATION_WARNINGS
4204 st->internal->avctx_inited = 0;
4207 find_stream_info_err:
4208 for (i = 0; i < ic->nb_streams; i++) {
4209 st = ic->streams[i];
4211 av_freep(&st->info->duration_error);
4212 avcodec_close(ic->streams[i]->internal->avctx);
4213 av_freep(&ic->streams[i]->info);
4214 av_bsf_free(&ic->streams[i]->internal->extract_extradata.bsf);
4215 av_packet_free(&ic->streams[i]->internal->extract_extradata.pkt);
4218 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
4219 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
4222 unref_then_goto_end:
4223 av_packet_unref(&pkt1);
4224 goto find_stream_info_err;
4227 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
4231 for (i = 0; i < ic->nb_programs; i++) {
4232 if (ic->programs[i] == last) {
4236 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
4237 if (ic->programs[i]->stream_index[j] == s)
4238 return ic->programs[i];
4244 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
4245 int wanted_stream_nb, int related_stream,
4246 AVCodec **decoder_ret, int flags)
4248 int i, nb_streams = ic->nb_streams;
4249 int ret = AVERROR_STREAM_NOT_FOUND;
4250 int best_count = -1, best_multiframe = -1, best_disposition = -1;
4251 int count, multiframe, disposition;
4252 int64_t best_bitrate = -1;
4254 unsigned *program = NULL;
4255 const AVCodec *decoder = NULL, *best_decoder = NULL;
4257 if (related_stream >= 0 && wanted_stream_nb < 0) {
4258 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
4260 program = p->stream_index;
4261 nb_streams = p->nb_stream_indexes;
4264 for (i = 0; i < nb_streams; i++) {
4265 int real_stream_index = program ? program[i] : i;
4266 AVStream *st = ic->streams[real_stream_index];
4267 AVCodecParameters *par = st->codecpar;
4268 if (par->codec_type != type)
4270 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
4272 if (type == AVMEDIA_TYPE_AUDIO && !(par->channels && par->sample_rate))
4275 decoder = find_decoder(ic, st, par->codec_id);
4278 ret = AVERROR_DECODER_NOT_FOUND;
4282 disposition = !(st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED | AV_DISPOSITION_VISUAL_IMPAIRED))
4283 + !! (st->disposition & AV_DISPOSITION_DEFAULT);
4284 count = st->codec_info_nb_frames;
4285 bitrate = par->bit_rate;
4286 multiframe = FFMIN(5, count);
4287 if ((best_disposition > disposition) ||
4288 (best_disposition == disposition && best_multiframe > multiframe) ||
4289 (best_disposition == disposition && best_multiframe == multiframe && best_bitrate > bitrate) ||
4290 (best_disposition == disposition && best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
4292 best_disposition = disposition;
4294 best_bitrate = bitrate;
4295 best_multiframe = multiframe;
4296 ret = real_stream_index;
4297 best_decoder = decoder;
4298 if (program && i == nb_streams - 1 && ret < 0) {
4300 nb_streams = ic->nb_streams;
4301 /* no related stream found, try again with everything */
4306 *decoder_ret = (AVCodec*)best_decoder;
4310 /*******************************************************/
4312 int av_read_play(AVFormatContext *s)
4314 if (s->iformat->read_play)
4315 return s->iformat->read_play(s);
4317 return avio_pause(s->pb, 0);
4318 return AVERROR(ENOSYS);
4321 int av_read_pause(AVFormatContext *s)
4323 if (s->iformat->read_pause)
4324 return s->iformat->read_pause(s);
4326 return avio_pause(s->pb, 1);
4327 return AVERROR(ENOSYS);
4330 int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
4335 dst->time_base = src->time_base;
4336 dst->nb_frames = src->nb_frames;
4337 dst->disposition = src->disposition;
4338 dst->sample_aspect_ratio = src->sample_aspect_ratio;
4339 dst->avg_frame_rate = src->avg_frame_rate;
4340 dst->r_frame_rate = src->r_frame_rate;
4342 av_dict_free(&dst->metadata);
4343 ret = av_dict_copy(&dst->metadata, src->metadata, 0);
4347 ret = avcodec_parameters_copy(dst->codecpar, src->codecpar);
4351 /* Free existing side data*/
4352 for (i = 0; i < dst->nb_side_data; i++)
4353 av_free(dst->side_data[i].data);
4354 av_freep(&dst->side_data);
4355 dst->nb_side_data = 0;
4357 /* Copy side data if present */
4358 if (src->nb_side_data) {
4359 dst->side_data = av_mallocz_array(src->nb_side_data,
4360 sizeof(AVPacketSideData));
4361 if (!dst->side_data)
4362 return AVERROR(ENOMEM);
4363 dst->nb_side_data = src->nb_side_data;
4365 for (i = 0; i < src->nb_side_data; i++) {
4366 uint8_t *data = av_memdup(src->side_data[i].data,
4367 src->side_data[i].size);
4369 return AVERROR(ENOMEM);
4370 dst->side_data[i].type = src->side_data[i].type;
4371 dst->side_data[i].size = src->side_data[i].size;
4372 dst->side_data[i].data = data;
4376 #if FF_API_LAVF_FFSERVER
4377 FF_DISABLE_DEPRECATION_WARNINGS
4378 av_freep(&dst->recommended_encoder_configuration);
4379 if (src->recommended_encoder_configuration) {
4380 const char *conf_str = src->recommended_encoder_configuration;
4381 dst->recommended_encoder_configuration = av_strdup(conf_str);
4382 if (!dst->recommended_encoder_configuration)
4383 return AVERROR(ENOMEM);
4385 FF_ENABLE_DEPRECATION_WARNINGS
4391 static void free_stream(AVStream **pst)
4393 AVStream *st = *pst;
4399 for (i = 0; i < st->nb_side_data; i++)
4400 av_freep(&st->side_data[i].data);
4401 av_freep(&st->side_data);
4404 av_parser_close(st->parser);
4406 if (st->attached_pic.data)
4407 av_packet_unref(&st->attached_pic);
4410 avcodec_free_context(&st->internal->avctx);
4411 for (i = 0; i < st->internal->nb_bsfcs; i++) {
4412 av_bsf_free(&st->internal->bsfcs[i]);
4413 av_freep(&st->internal->bsfcs);
4415 av_freep(&st->internal->priv_pts);
4416 av_bsf_free(&st->internal->extract_extradata.bsf);
4417 av_packet_free(&st->internal->extract_extradata.pkt);
4419 av_freep(&st->internal);
4421 av_dict_free(&st->metadata);
4422 avcodec_parameters_free(&st->codecpar);
4423 av_freep(&st->probe_data.buf);
4424 av_freep(&st->index_entries);
4425 #if FF_API_LAVF_AVCTX
4426 FF_DISABLE_DEPRECATION_WARNINGS
4427 avcodec_free_context(&st->codec);
4428 FF_ENABLE_DEPRECATION_WARNINGS
4430 av_freep(&st->priv_data);
4432 av_freep(&st->info->duration_error);
4433 av_freep(&st->info);
4434 #if FF_API_LAVF_FFSERVER
4435 FF_DISABLE_DEPRECATION_WARNINGS
4436 av_freep(&st->recommended_encoder_configuration);
4437 FF_ENABLE_DEPRECATION_WARNINGS
4443 void ff_free_stream(AVFormatContext *s, AVStream *st)
4445 av_assert0(s->nb_streams>0);
4446 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
4448 free_stream(&s->streams[ --s->nb_streams ]);
4451 void avformat_free_context(AVFormatContext *s)
4458 if (s->oformat && s->oformat->deinit && s->internal->initialized)
4459 s->oformat->deinit(s);
4462 if (s->iformat && s->iformat->priv_class && s->priv_data)
4463 av_opt_free(s->priv_data);
4464 if (s->oformat && s->oformat->priv_class && s->priv_data)
4465 av_opt_free(s->priv_data);
4467 for (i = 0; i < s->nb_streams; i++)
4468 free_stream(&s->streams[i]);
4471 for (i = 0; i < s->nb_programs; i++) {
4472 av_dict_free(&s->programs[i]->metadata);
4473 av_freep(&s->programs[i]->stream_index);
4474 av_freep(&s->programs[i]);
4478 av_freep(&s->programs);
4479 av_freep(&s->priv_data);
4480 while (s->nb_chapters--) {
4481 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
4482 av_freep(&s->chapters[s->nb_chapters]);
4484 av_freep(&s->chapters);
4485 av_dict_free(&s->metadata);
4486 av_dict_free(&s->internal->id3v2_meta);
4487 av_freep(&s->streams);
4488 flush_packet_queue(s);
4489 av_freep(&s->internal);
4494 void avformat_close_input(AVFormatContext **ps)
4505 if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) ||
4506 (s->flags & AVFMT_FLAG_CUSTOM_IO))
4509 flush_packet_queue(s);
4512 if (s->iformat->read_close)
4513 s->iformat->read_close(s);
4515 avformat_free_context(s);
4522 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
4528 if (s->nb_streams >= FFMIN(s->max_streams, INT_MAX/sizeof(*streams))) {
4529 if (s->max_streams < INT_MAX/sizeof(*streams))
4530 av_log(s, AV_LOG_ERROR, "Number of streams exceeds max_streams parameter (%d), see the documentation if you wish to increase it\n", s->max_streams);
4533 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
4536 s->streams = streams;
4538 st = av_mallocz(sizeof(AVStream));
4541 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
4545 st->info->last_dts = AV_NOPTS_VALUE;
4547 #if FF_API_LAVF_AVCTX
4548 FF_DISABLE_DEPRECATION_WARNINGS
4549 st->codec = avcodec_alloc_context3(c);
4555 FF_ENABLE_DEPRECATION_WARNINGS
4558 st->internal = av_mallocz(sizeof(*st->internal));
4562 st->codecpar = avcodec_parameters_alloc();
4566 st->internal->avctx = avcodec_alloc_context3(NULL);
4567 if (!st->internal->avctx)
4571 #if FF_API_LAVF_AVCTX
4572 FF_DISABLE_DEPRECATION_WARNINGS
4573 /* no default bitrate if decoding */
4574 st->codec->bit_rate = 0;
4575 FF_ENABLE_DEPRECATION_WARNINGS
4578 /* default pts setting is MPEG-like */
4579 avpriv_set_pts_info(st, 33, 1, 90000);
4580 /* we set the current DTS to 0 so that formats without any timestamps
4581 * but durations get some timestamps, formats with some unknown
4582 * timestamps have their first few packets buffered and the
4583 * timestamps corrected before they are returned to the user */
4584 st->cur_dts = RELATIVE_TS_BASE;
4586 st->cur_dts = AV_NOPTS_VALUE;
4589 st->index = s->nb_streams;
4590 st->start_time = AV_NOPTS_VALUE;
4591 st->duration = AV_NOPTS_VALUE;
4592 st->first_dts = AV_NOPTS_VALUE;
4593 st->probe_packets = s->max_probe_packets;
4594 st->pts_wrap_reference = AV_NOPTS_VALUE;
4595 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
4597 st->last_IP_pts = AV_NOPTS_VALUE;
4598 st->last_dts_for_order_check = AV_NOPTS_VALUE;
4599 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
4600 st->pts_buffer[i] = AV_NOPTS_VALUE;
4602 st->sample_aspect_ratio = (AVRational) { 0, 1 };
4604 #if FF_API_R_FRAME_RATE
4605 st->info->last_dts = AV_NOPTS_VALUE;
4607 st->info->fps_first_dts = AV_NOPTS_VALUE;
4608 st->info->fps_last_dts = AV_NOPTS_VALUE;
4610 st->inject_global_side_data = s->internal->inject_global_side_data;
4612 st->internal->need_context_update = 1;
4614 s->streams[s->nb_streams++] = st;
4621 AVProgram *av_new_program(AVFormatContext *ac, int id)
4623 AVProgram *program = NULL;
4626 av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
4628 for (i = 0; i < ac->nb_programs; i++)
4629 if (ac->programs[i]->id == id)
4630 program = ac->programs[i];
4633 program = av_mallocz(sizeof(AVProgram));
4636 dynarray_add(&ac->programs, &ac->nb_programs, program);
4637 program->discard = AVDISCARD_NONE;
4638 program->pmt_version = -1;
4641 program->pts_wrap_reference = AV_NOPTS_VALUE;
4642 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
4644 program->start_time =
4645 program->end_time = AV_NOPTS_VALUE;
4650 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
4651 int64_t start, int64_t end, const char *title)
4653 AVChapter *chapter = NULL;
4656 if (end != AV_NOPTS_VALUE && start > end) {
4657 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
4661 for (i = 0; i < s->nb_chapters; i++)
4662 if (s->chapters[i]->id == id)
4663 chapter = s->chapters[i];
4666 chapter = av_mallocz(sizeof(AVChapter));
4669 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
4671 av_dict_set(&chapter->metadata, "title", title, 0);
4673 chapter->time_base = time_base;
4674 chapter->start = start;
4680 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
4683 AVProgram *program = NULL;
4686 if (idx >= ac->nb_streams) {
4687 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
4691 for (i = 0; i < ac->nb_programs; i++) {
4692 if (ac->programs[i]->id != progid)
4694 program = ac->programs[i];
4695 for (j = 0; j < program->nb_stream_indexes; j++)
4696 if (program->stream_index[j] == idx)
4699 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
4702 program->stream_index = tmp;
4703 program->stream_index[program->nb_stream_indexes++] = idx;
4708 uint64_t ff_ntp_time(void)
4710 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
4713 uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us)
4715 uint64_t ntp_ts, frac_part, sec;
4718 //current ntp time in seconds and micro seconds
4719 sec = ntp_time_us / 1000000;
4720 usec = ntp_time_us % 1000000;
4722 //encoding in ntp timestamp format
4723 frac_part = usec * 0xFFFFFFFFULL;
4724 frac_part /= 1000000;
4726 if (sec > 0xFFFFFFFFULL)
4727 av_log(NULL, AV_LOG_WARNING, "NTP time format roll over detected\n");
4730 ntp_ts |= frac_part;
4735 int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
4738 char *q, buf1[20], c;
4739 int nd, len, percentd_found;
4751 while (av_isdigit(*p))
4752 nd = nd * 10 + *p++ - '0';
4754 } while (av_isdigit(c));
4760 if (!(flags & AV_FRAME_FILENAME_FLAGS_MULTIPLE) && percentd_found)
4765 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4767 if ((q - buf + len) > buf_size - 1)
4769 memcpy(q, buf1, len);
4777 if ((q - buf) < buf_size - 1)
4781 if (!percentd_found)
4790 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
4792 return av_get_frame_filename2(buf, buf_size, path, number, 0);
4795 void av_url_split(char *proto, int proto_size,
4796 char *authorization, int authorization_size,
4797 char *hostname, int hostname_size,
4798 int *port_ptr, char *path, int path_size, const char *url)
4800 const char *p, *ls, *at, *at2, *col, *brk;
4806 if (authorization_size > 0)
4807 authorization[0] = 0;
4808 if (hostname_size > 0)
4813 /* parse protocol */
4814 if ((p = strchr(url, ':'))) {
4815 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4822 /* no protocol means plain filename */
4823 av_strlcpy(path, url, path_size);
4827 /* separate path from hostname */
4828 ls = p + strcspn(p, "/?#");
4829 av_strlcpy(path, ls, path_size);
4831 /* the rest is hostname, use that to parse auth/port */
4833 /* authorization (user[:pass]@hostname) */
4835 while ((at = strchr(p, '@')) && at < ls) {
4836 av_strlcpy(authorization, at2,
4837 FFMIN(authorization_size, at + 1 - at2));
4838 p = at + 1; /* skip '@' */
4841 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4843 av_strlcpy(hostname, p + 1,
4844 FFMIN(hostname_size, brk - p));
4845 if (brk[1] == ':' && port_ptr)
4846 *port_ptr = atoi(brk + 2);
4847 } else if ((col = strchr(p, ':')) && col < ls) {
4848 av_strlcpy(hostname, p,
4849 FFMIN(col + 1 - p, hostname_size));
4851 *port_ptr = atoi(col + 1);
4853 av_strlcpy(hostname, p,
4854 FFMIN(ls + 1 - p, hostname_size));
4858 int ff_mkdir_p(const char *path)
4861 char *temp = av_strdup(path);
4865 if (!path || !temp) {
4869 if (!av_strncasecmp(temp, "/", 1) || !av_strncasecmp(temp, "\\", 1)) {
4871 } else if (!av_strncasecmp(temp, "./", 2) || !av_strncasecmp(temp, ".\\", 2)) {
4875 for ( ; *pos != '\0'; ++pos) {
4876 if (*pos == '/' || *pos == '\\') {
4879 ret = mkdir(temp, 0755);
4884 if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
4885 ret = mkdir(temp, 0755);
4892 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4895 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4898 'C', 'D', 'E', 'F' };
4899 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4902 'c', 'd', 'e', 'f' };
4903 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4905 for (i = 0; i < s; i++) {
4906 buff[i * 2] = hex_table[src[i] >> 4];
4907 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4913 int ff_hex_to_data(uint8_t *data, const char *p)
4920 p += strspn(p, SPACE_CHARS);
4923 c = av_toupper((unsigned char) *p++);
4924 if (c >= '0' && c <= '9')
4926 else if (c >= 'A' && c <= 'F')
4941 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4942 unsigned int pts_num, unsigned int pts_den)
4945 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
4946 if (new_tb.num != pts_num)
4947 av_log(NULL, AV_LOG_DEBUG,
4948 "st:%d removing common factor %d from timebase\n",
4949 s->index, pts_num / new_tb.num);
4951 av_log(NULL, AV_LOG_WARNING,
4952 "st:%d has too large timebase, reducing\n", s->index);
4954 if (new_tb.num <= 0 || new_tb.den <= 0) {
4955 av_log(NULL, AV_LOG_ERROR,
4956 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
4957 new_tb.num, new_tb.den,
4961 s->time_base = new_tb;
4962 #if FF_API_LAVF_AVCTX
4963 FF_DISABLE_DEPRECATION_WARNINGS
4964 s->codec->pkt_timebase = new_tb;
4965 FF_ENABLE_DEPRECATION_WARNINGS
4967 s->internal->avctx->pkt_timebase = new_tb;
4968 s->pts_wrap_bits = pts_wrap_bits;
4971 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4974 const char *ptr = str;
4976 /* Parse key=value pairs. */
4979 char *dest = NULL, *dest_end;
4980 int key_len, dest_len = 0;
4982 /* Skip whitespace and potential commas. */
4983 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
4990 if (!(ptr = strchr(key, '=')))
4993 key_len = ptr - key;
4995 callback_get_buf(context, key, key_len, &dest, &dest_len);
4996 dest_end = dest + dest_len - 1;
5000 while (*ptr && *ptr != '\"') {
5004 if (dest && dest < dest_end)
5008 if (dest && dest < dest_end)
5016 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
5017 if (dest && dest < dest_end)
5025 int ff_find_stream_index(AVFormatContext *s, int id)
5028 for (i = 0; i < s->nb_streams; i++)
5029 if (s->streams[i]->id == id)
5034 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
5038 unsigned int codec_tag;
5039 if (ofmt->query_codec)
5040 return ofmt->query_codec(codec_id, std_compliance);
5041 else if (ofmt->codec_tag)
5042 return !!av_codec_get_tag2(ofmt->codec_tag, codec_id, &codec_tag);
5043 else if (codec_id == ofmt->video_codec ||
5044 codec_id == ofmt->audio_codec ||
5045 codec_id == ofmt->subtitle_codec ||
5046 codec_id == ofmt->data_codec)
5049 return AVERROR_PATCHWELCOME;
5052 int avformat_network_init(void)
5056 if ((ret = ff_network_init()) < 0)
5058 if ((ret = ff_tls_init()) < 0)
5064 int avformat_network_deinit(void)
5073 int ff_add_param_change(AVPacket *pkt, int32_t channels,
5074 uint64_t channel_layout, int32_t sample_rate,
5075 int32_t width, int32_t height)
5081 return AVERROR(EINVAL);
5084 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
5086 if (channel_layout) {
5088 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
5092 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
5094 if (width || height) {
5096 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
5098 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
5100 return AVERROR(ENOMEM);
5101 bytestream_put_le32(&data, flags);
5103 bytestream_put_le32(&data, channels);
5105 bytestream_put_le64(&data, channel_layout);
5107 bytestream_put_le32(&data, sample_rate);
5108 if (width || height) {
5109 bytestream_put_le32(&data, width);
5110 bytestream_put_le32(&data, height);
5115 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
5117 AVRational undef = {0, 1};
5118 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
5119 AVRational codec_sample_aspect_ratio = stream && stream->codecpar ? stream->codecpar->sample_aspect_ratio : undef;
5120 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
5122 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
5123 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
5124 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
5125 stream_sample_aspect_ratio = undef;
5127 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
5128 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
5129 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
5130 frame_sample_aspect_ratio = undef;
5132 if (stream_sample_aspect_ratio.num)
5133 return stream_sample_aspect_ratio;
5135 return frame_sample_aspect_ratio;
5138 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
5140 AVRational fr = st->r_frame_rate;
5141 AVRational codec_fr = st->internal->avctx->framerate;
5142 AVRational avg_fr = st->avg_frame_rate;
5144 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
5145 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
5150 if (st->internal->avctx->ticks_per_frame > 1) {
5151 if ( codec_fr.num > 0 && codec_fr.den > 0 &&
5152 (fr.num == 0 || av_q2d(codec_fr) < av_q2d(fr)*0.7 && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1))
5160 * Matches a stream specifier (but ignores requested index).
5162 * @param indexptr set to point to the requested stream index if there is one
5164 * @return <0 on error
5165 * 0 if st is NOT a matching stream
5166 * >0 if st is a matching stream
5168 static int match_stream_specifier(AVFormatContext *s, AVStream *st,
5169 const char *spec, const char **indexptr, AVProgram **p)
5171 int match = 1; /* Stores if the specifier matches so far. */
5173 if (*spec <= '9' && *spec >= '0') { /* opt:index */
5177 } else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
5178 *spec == 't' || *spec == 'V') { /* opt:[vasdtV] */
5179 enum AVMediaType type;
5183 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
5184 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
5185 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
5186 case 'd': type = AVMEDIA_TYPE_DATA; break;
5187 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
5188 case 'V': type = AVMEDIA_TYPE_VIDEO; nopic = 1; break;
5189 default: av_assert0(0);
5191 if (*spec && *spec++ != ':') /* If we are not at the end, then another specifier must follow. */
5192 return AVERROR(EINVAL);
5194 #if FF_API_LAVF_AVCTX
5195 FF_DISABLE_DEPRECATION_WARNINGS
5196 if (type != st->codecpar->codec_type
5197 && (st->codecpar->codec_type != AVMEDIA_TYPE_UNKNOWN || st->codec->codec_type != type))
5199 FF_ENABLE_DEPRECATION_WARNINGS
5201 if (type != st->codecpar->codec_type)
5204 if (nopic && (st->disposition & AV_DISPOSITION_ATTACHED_PIC))
5206 } else if (*spec == 'p' && *(spec + 1) == ':') {
5211 prog_id = strtol(spec, &endptr, 0);
5212 /* Disallow empty id and make sure that if we are not at the end, then another specifier must follow. */
5213 if (spec == endptr || (*endptr && *endptr++ != ':'))
5214 return AVERROR(EINVAL);
5217 for (i = 0; i < s->nb_programs; i++) {
5218 if (s->programs[i]->id != prog_id)
5221 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) {
5222 if (st->index == s->programs[i]->stream_index[j]) {
5225 *p = s->programs[i];
5234 } else if (*spec == '#' ||
5235 (*spec == 'i' && *(spec + 1) == ':')) {
5238 spec += 1 + (*spec == 'i');
5239 stream_id = strtol(spec, &endptr, 0);
5240 if (spec == endptr || *endptr) /* Disallow empty id and make sure we are at the end. */
5241 return AVERROR(EINVAL);
5242 return match && (stream_id == st->id);
5243 } else if (*spec == 'm' && *(spec + 1) == ':') {
5244 AVDictionaryEntry *tag;
5250 val = strchr(spec, ':');
5252 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
5254 return AVERROR(ENOMEM);
5256 tag = av_dict_get(st->metadata, key, NULL, 0);
5258 if (!val || !strcmp(tag->value, val + 1))
5267 return match && ret;
5268 } else if (*spec == 'u' && *(spec + 1) == '\0') {
5269 AVCodecParameters *par = st->codecpar;
5270 #if FF_API_LAVF_AVCTX
5271 FF_DISABLE_DEPRECATION_WARNINGS
5272 AVCodecContext *codec = st->codec;
5273 FF_ENABLE_DEPRECATION_WARNINGS
5276 switch (par->codec_type) {
5277 case AVMEDIA_TYPE_AUDIO:
5278 val = par->sample_rate && par->channels;
5279 #if FF_API_LAVF_AVCTX
5280 val = val || (codec->sample_rate && codec->channels);
5282 if (par->format == AV_SAMPLE_FMT_NONE
5283 #if FF_API_LAVF_AVCTX
5284 && codec->sample_fmt == AV_SAMPLE_FMT_NONE
5289 case AVMEDIA_TYPE_VIDEO:
5290 val = par->width && par->height;
5291 #if FF_API_LAVF_AVCTX
5292 val = val || (codec->width && codec->height);
5294 if (par->format == AV_PIX_FMT_NONE
5295 #if FF_API_LAVF_AVCTX
5296 && codec->pix_fmt == AV_PIX_FMT_NONE
5301 case AVMEDIA_TYPE_UNKNOWN:
5308 #if FF_API_LAVF_AVCTX
5309 return match && ((par->codec_id != AV_CODEC_ID_NONE || codec->codec_id != AV_CODEC_ID_NONE) && val != 0);
5311 return match && (par->codec_id != AV_CODEC_ID_NONE && val != 0);
5314 return AVERROR(EINVAL);
5322 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
5327 const char *indexptr = NULL;
5328 AVProgram *p = NULL;
5331 ret = match_stream_specifier(s, st, spec, &indexptr, &p);
5338 index = strtol(indexptr, &endptr, 0);
5339 if (*endptr) { /* We can't have anything after the requested index. */
5340 ret = AVERROR(EINVAL);
5344 /* This is not really needed but saves us a loop for simple stream index specifiers. */
5345 if (spec == indexptr)
5346 return (index == st->index);
5348 /* If we requested a matching stream index, we have to ensure st is that. */
5349 nb_streams = p ? p->nb_stream_indexes : s->nb_streams;
5350 for (int i = 0; i < nb_streams && index >= 0; i++) {
5351 AVStream *candidate = p ? s->streams[p->stream_index[i]] : s->streams[i];
5352 ret = match_stream_specifier(s, candidate, spec, NULL, NULL);
5355 if (ret > 0 && index-- == 0 && st == candidate)
5361 if (ret == AVERROR(EINVAL))
5362 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
5366 int ff_generate_avci_extradata(AVStream *st)
5368 static const uint8_t avci100_1080p_extradata[] = {
5370 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
5371 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
5372 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
5373 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
5374 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
5375 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
5376 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
5377 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
5378 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
5380 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
5383 static const uint8_t avci100_1080i_extradata[] = {
5385 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
5386 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
5387 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
5388 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
5389 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
5390 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
5391 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
5392 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
5393 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
5394 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
5395 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x20,
5397 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
5400 static const uint8_t avci50_1080p_extradata[] = {
5402 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
5403 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
5404 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
5405 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37,
5406 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde,
5407 0x6e, 0x6c, 0xd3, 0x3c, 0x05, 0xa0, 0x22, 0x7e,
5408 0x5f, 0xfc, 0x00, 0x0c, 0x00, 0x13, 0x8c, 0x04,
5409 0x04, 0x05, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00,
5410 0x00, 0x03, 0x00, 0x32, 0x84, 0x00, 0x00, 0x00,
5412 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
5415 static const uint8_t avci50_1080i_extradata[] = {
5417 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
5418 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
5419 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
5420 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
5421 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
5422 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
5423 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
5424 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
5425 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
5426 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
5427 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
5429 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
5432 static const uint8_t avci100_720p_extradata[] = {
5434 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
5435 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
5436 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
5437 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
5438 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
5439 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
5440 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
5441 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
5442 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
5443 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
5445 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
5448 static const uint8_t avci50_720p_extradata[] = {
5450 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x20,
5451 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
5452 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
5453 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37,
5454 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde,
5455 0x6e, 0x6c, 0xd3, 0x3c, 0x0f, 0x01, 0x6e, 0xff,
5456 0xc0, 0x00, 0xc0, 0x01, 0x38, 0xc0, 0x40, 0x40,
5457 0x50, 0x00, 0x00, 0x03, 0x00, 0x10, 0x00, 0x00,
5458 0x06, 0x48, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
5460 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
5464 const uint8_t *data = NULL;
5467 if (st->codecpar->width == 1920) {
5468 if (st->codecpar->field_order == AV_FIELD_PROGRESSIVE) {
5469 data = avci100_1080p_extradata;
5470 size = sizeof(avci100_1080p_extradata);
5472 data = avci100_1080i_extradata;
5473 size = sizeof(avci100_1080i_extradata);
5475 } else if (st->codecpar->width == 1440) {
5476 if (st->codecpar->field_order == AV_FIELD_PROGRESSIVE) {
5477 data = avci50_1080p_extradata;
5478 size = sizeof(avci50_1080p_extradata);
5480 data = avci50_1080i_extradata;
5481 size = sizeof(avci50_1080i_extradata);
5483 } else if (st->codecpar->width == 1280) {
5484 data = avci100_720p_extradata;
5485 size = sizeof(avci100_720p_extradata);
5486 } else if (st->codecpar->width == 960) {
5487 data = avci50_720p_extradata;
5488 size = sizeof(avci50_720p_extradata);
5494 if ((ret = ff_alloc_extradata(st->codecpar, size)) < 0)
5496 memcpy(st->codecpar->extradata, data, size);
5501 uint8_t *av_stream_get_side_data(const AVStream *st,
5502 enum AVPacketSideDataType type, int *size)
5506 for (i = 0; i < st->nb_side_data; i++) {
5507 if (st->side_data[i].type == type) {
5509 *size = st->side_data[i].size;
5510 return st->side_data[i].data;
5516 int av_stream_add_side_data(AVStream *st, enum AVPacketSideDataType type,
5517 uint8_t *data, size_t size)
5519 AVPacketSideData *sd, *tmp;
5522 for (i = 0; i < st->nb_side_data; i++) {
5523 sd = &st->side_data[i];
5525 if (sd->type == type) {
5526 av_freep(&sd->data);
5533 if ((unsigned)st->nb_side_data + 1 >= INT_MAX / sizeof(*st->side_data))
5534 return AVERROR(ERANGE);
5536 tmp = av_realloc(st->side_data, (st->nb_side_data + 1) * sizeof(*tmp));
5538 return AVERROR(ENOMEM);
5541 st->side_data = tmp;
5544 sd = &st->side_data[st->nb_side_data - 1];
5552 uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
5556 uint8_t *data = av_malloc(size);
5561 ret = av_stream_add_side_data(st, type, data, size);
5570 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
5573 const AVBitStreamFilter *bsf;
5575 AVCodecParameters *in_par;
5577 if (!(bsf = av_bsf_get_by_name(name))) {
5578 av_log(NULL, AV_LOG_ERROR, "Unknown bitstream filter '%s'\n", name);
5579 return AVERROR_BSF_NOT_FOUND;
5582 if ((ret = av_bsf_alloc(bsf, &bsfc)) < 0)
5585 if (st->internal->nb_bsfcs) {
5586 in_par = st->internal->bsfcs[st->internal->nb_bsfcs - 1]->par_out;
5587 bsfc->time_base_in = st->internal->bsfcs[st->internal->nb_bsfcs - 1]->time_base_out;
5589 in_par = st->codecpar;
5590 bsfc->time_base_in = st->time_base;
5593 if ((ret = avcodec_parameters_copy(bsfc->par_in, in_par)) < 0) {
5598 if (args && bsfc->filter->priv_class) {
5599 const AVOption *opt = av_opt_next(bsfc->priv_data, NULL);
5600 const char * shorthand[2] = {NULL};
5603 shorthand[0] = opt->name;
5605 if ((ret = av_opt_set_from_string(bsfc->priv_data, args, shorthand, "=", ":")) < 0) {
5611 if ((ret = av_bsf_init(bsfc)) < 0) {
5616 if ((ret = av_dynarray_add_nofree(&st->internal->bsfcs, &st->internal->nb_bsfcs, bsfc))) {
5621 av_log(NULL, AV_LOG_VERBOSE,
5622 "Automatically inserted bitstream filter '%s'; args='%s'\n",
5623 name, args ? args : "");
5628 FF_DISABLE_DEPRECATION_WARNINGS
5629 int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt,
5630 AVBitStreamFilterContext *bsfc)
5634 AVPacket new_pkt = *pkt;
5635 int a = av_bitstream_filter_filter(bsfc, codec, NULL,
5636 &new_pkt.data, &new_pkt.size,
5637 pkt->data, pkt->size,
5638 pkt->flags & AV_PKT_FLAG_KEY);
5639 if (a == 0 && new_pkt.size == 0 && new_pkt.side_data_elems == 0) {
5640 av_packet_unref(pkt);
5641 memset(pkt, 0, sizeof(*pkt));
5644 if(a == 0 && new_pkt.data != pkt->data) {
5645 uint8_t *t = av_malloc(new_pkt.size + AV_INPUT_BUFFER_PADDING_SIZE); //the new should be a subset of the old so cannot overflow
5647 memcpy(t, new_pkt.data, new_pkt.size);
5648 memset(t + new_pkt.size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
5653 a = AVERROR(ENOMEM);
5657 new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
5658 av_buffer_default_free, NULL, 0);
5660 pkt->side_data = NULL;
5661 pkt->side_data_elems = 0;
5662 av_packet_unref(pkt);
5664 av_freep(&new_pkt.data);
5665 a = AVERROR(ENOMEM);
5669 av_log(codec, AV_LOG_ERROR,
5670 "Failed to open bitstream filter %s for stream %d with codec %s",
5671 bsfc->filter->name, pkt->stream_index,
5672 codec->codec ? codec->codec->name : "copy");
5682 FF_ENABLE_DEPRECATION_WARNINGS
5685 int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
5688 return AVERROR(EINVAL);
5690 if (!(s->oformat->flags & AVFMT_NOFILE))
5691 return s->io_open(s, &s->pb, url, AVIO_FLAG_WRITE, options);
5695 void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
5698 s->io_close(s, *pb);
5702 int ff_is_http_proto(char *filename) {
5703 const char *proto = avio_find_protocol_name(filename);
5704 return proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
5707 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
5709 AVDictionaryEntry *entry;
5710 int64_t parsed_timestamp;
5712 if ((entry = av_dict_get(s->metadata, "creation_time", NULL, 0))) {
5713 if ((ret = av_parse_time(&parsed_timestamp, entry->value, 0)) >= 0) {
5714 *timestamp = return_seconds ? parsed_timestamp / 1000000 : parsed_timestamp;
5717 av_log(s, AV_LOG_WARNING, "Failed to parse creation_time %s\n", entry->value);
5724 int ff_standardize_creation_time(AVFormatContext *s)
5727 int ret = ff_parse_creation_time_metadata(s, ×tamp, 0);
5729 return avpriv_dict_set_timestamp(&s->metadata, "creation_time", timestamp);
5733 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
5738 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_PALETTE, &size);
5740 if (size != AVPALETTE_SIZE) {
5741 av_log(s, AV_LOG_ERROR, "Invalid palette side data\n");
5742 return AVERROR_INVALIDDATA;
5744 memcpy(palette, side_data, AVPALETTE_SIZE);
5748 if (ret == CONTAINS_PAL) {
5750 for (i = 0; i < AVPALETTE_COUNT; i++)
5751 palette[i] = AV_RL32(pkt->data + pkt->size - AVPALETTE_SIZE + i*4);
5758 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf)
5763 ret = av_bprint_finalize(buf, &str);
5766 if (!av_bprint_is_complete(buf)) {
5768 return AVERROR(ENOMEM);
5771 par->extradata = str;
5772 /* Note: the string is NUL terminated (so extradata can be read as a
5773 * string), but the ending character is not accounted in the size (in
5774 * binary formats you are likely not supposed to mux that character). When
5775 * extradata is copied, it is also padded with AV_INPUT_BUFFER_PADDING_SIZE
5777 par->extradata_size = buf->len;
5781 int avformat_transfer_internal_stream_timing_info(const AVOutputFormat *ofmt,
5782 AVStream *ost, const AVStream *ist,
5783 enum AVTimebaseSource copy_tb)
5785 //TODO: use [io]st->internal->avctx
5786 const AVCodecContext *dec_ctx = ist->codec;
5787 AVCodecContext *enc_ctx = ost->codec;
5789 enc_ctx->time_base = ist->time_base;
5791 * Avi is a special case here because it supports variable fps but
5792 * having the fps and timebase differe significantly adds quite some
5795 if (!strcmp(ofmt->name, "avi")) {
5796 #if FF_API_R_FRAME_RATE
5797 if (copy_tb == AVFMT_TBCF_AUTO && ist->r_frame_rate.num
5798 && av_q2d(ist->r_frame_rate) >= av_q2d(ist->avg_frame_rate)
5799 && 0.5/av_q2d(ist->r_frame_rate) > av_q2d(ist->time_base)
5800 && 0.5/av_q2d(ist->r_frame_rate) > av_q2d(dec_ctx->time_base)
5801 && av_q2d(ist->time_base) < 1.0/500 && av_q2d(dec_ctx->time_base) < 1.0/500
5802 || copy_tb == AVFMT_TBCF_R_FRAMERATE) {
5803 enc_ctx->time_base.num = ist->r_frame_rate.den;
5804 enc_ctx->time_base.den = 2*ist->r_frame_rate.num;
5805 enc_ctx->ticks_per_frame = 2;
5808 if (copy_tb == AVFMT_TBCF_AUTO && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > 2*av_q2d(ist->time_base)
5809 && av_q2d(ist->time_base) < 1.0/500
5810 || copy_tb == AVFMT_TBCF_DECODER) {
5811 enc_ctx->time_base = dec_ctx->time_base;
5812 enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
5813 enc_ctx->time_base.den *= 2;
5814 enc_ctx->ticks_per_frame = 2;
5816 } else if (!(ofmt->flags & AVFMT_VARIABLE_FPS)
5817 && !av_match_name(ofmt->name, "mov,mp4,3gp,3g2,psp,ipod,ismv,f4v")) {
5818 if (copy_tb == AVFMT_TBCF_AUTO && dec_ctx->time_base.den
5819 && av_q2d(dec_ctx->time_base)*dec_ctx->ticks_per_frame > av_q2d(ist->time_base)
5820 && av_q2d(ist->time_base) < 1.0/500
5821 || copy_tb == AVFMT_TBCF_DECODER) {
5822 enc_ctx->time_base = dec_ctx->time_base;
5823 enc_ctx->time_base.num *= dec_ctx->ticks_per_frame;
5827 if ((enc_ctx->codec_tag == AV_RL32("tmcd") || ost->codecpar->codec_tag == AV_RL32("tmcd"))
5828 && dec_ctx->time_base.num < dec_ctx->time_base.den
5829 && dec_ctx->time_base.num > 0
5830 && 121LL*dec_ctx->time_base.num > dec_ctx->time_base.den) {
5831 enc_ctx->time_base = dec_ctx->time_base;
5834 if (ost->avg_frame_rate.num)
5835 enc_ctx->time_base = av_inv_q(ost->avg_frame_rate);
5837 av_reduce(&enc_ctx->time_base.num, &enc_ctx->time_base.den,
5838 enc_ctx->time_base.num, enc_ctx->time_base.den, INT_MAX);
5843 AVRational av_stream_get_codec_timebase(const AVStream *st)
5845 // See avformat_transfer_internal_stream_timing_info() TODO.
5846 #if FF_API_LAVF_AVCTX
5847 FF_DISABLE_DEPRECATION_WARNINGS
5848 return st->codec->time_base;
5849 FF_ENABLE_DEPRECATION_WARNINGS
5851 return st->internal->avctx->time_base;
5855 void ff_format_set_url(AVFormatContext *s, char *url)
5860 #if FF_API_FORMAT_FILENAME
5861 FF_DISABLE_DEPRECATION_WARNINGS
5862 av_strlcpy(s->filename, url, sizeof(s->filename));
5863 FF_ENABLE_DEPRECATION_WARNINGS