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
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/parseutils.h"
34 #include "libavutil/pixdesc.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"
42 #include "audiointerleave.h"
44 #include "avio_internal.h"
54 #include "libavutil/ffversion.h"
55 const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
59 * various utility functions for use within FFmpeg
62 unsigned avformat_version(void)
64 av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100);
65 return LIBAVFORMAT_VERSION_INT;
68 const char *avformat_configuration(void)
70 return FFMPEG_CONFIGURATION;
73 const char *avformat_license(void)
75 #define LICENSE_PREFIX "libavformat license: "
76 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
79 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
81 static int is_relative(int64_t ts) {
82 return ts > (RELATIVE_TS_BASE - (1LL<<48));
86 * Wrap a given time stamp, if there is an indication for an overflow
89 * @param timestamp the time stamp to wrap
90 * @return resulting time stamp
92 static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
94 if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE &&
95 st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) {
96 if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET &&
97 timestamp < st->pts_wrap_reference)
98 return timestamp + (1ULL << st->pts_wrap_bits);
99 else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET &&
100 timestamp >= st->pts_wrap_reference)
101 return timestamp - (1ULL << st->pts_wrap_bits);
106 MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
107 MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration)
108 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
109 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
110 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
111 MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, data_codec)
112 MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding)
113 MAKE_ACCESSORS(AVFormatContext, format, void *, opaque)
114 MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb)
115 #if FF_API_OLD_OPEN_CALLBACKS
116 FF_DISABLE_DEPRECATION_WARNINGS
117 MAKE_ACCESSORS(AVFormatContext, format, AVOpenCallback, open_cb)
118 FF_ENABLE_DEPRECATION_WARNINGS
121 int64_t av_stream_get_end_pts(const AVStream *st)
124 return st->priv_pts->val;
126 return AV_NOPTS_VALUE;
129 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
134 void av_format_inject_global_side_data(AVFormatContext *s)
137 s->internal->inject_global_side_data = 1;
138 for (i = 0; i < s->nb_streams; i++) {
139 AVStream *st = s->streams[i];
140 st->inject_global_side_data = 1;
144 int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
146 av_assert0(!dst->codec_whitelist &&
147 !dst->format_whitelist &&
148 !dst->protocol_whitelist);
149 dst-> codec_whitelist = av_strdup(src->codec_whitelist);
150 dst->format_whitelist = av_strdup(src->format_whitelist);
151 dst->protocol_whitelist = av_strdup(src->protocol_whitelist);
152 if ( (src-> codec_whitelist && !dst-> codec_whitelist)
153 || (src-> format_whitelist && !dst-> format_whitelist)
154 || (src->protocol_whitelist && !dst->protocol_whitelist)) {
155 av_log(dst, AV_LOG_ERROR, "Failed to duplicate whitelist\n");
156 return AVERROR(ENOMEM);
161 static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id)
163 if (st->codec->codec)
164 return st->codec->codec;
166 switch (st->codec->codec_type) {
167 case AVMEDIA_TYPE_VIDEO:
168 if (s->video_codec) return s->video_codec;
170 case AVMEDIA_TYPE_AUDIO:
171 if (s->audio_codec) return s->audio_codec;
173 case AVMEDIA_TYPE_SUBTITLE:
174 if (s->subtitle_codec) return s->subtitle_codec;
178 return avcodec_find_decoder(codec_id);
181 int av_format_get_probe_score(const AVFormatContext *s)
183 return s->probe_score;
186 /* an arbitrarily chosen "sane" max packet size -- 50M */
187 #define SANE_CHUNK_SIZE (50000000)
189 int ffio_limit(AVIOContext *s, int size)
191 if (s->maxsize>= 0) {
192 int64_t remaining= s->maxsize - avio_tell(s);
193 if (remaining < size) {
194 int64_t newsize = avio_size(s);
195 if (!s->maxsize || s->maxsize<newsize)
196 s->maxsize = newsize - !newsize;
197 remaining= s->maxsize - avio_tell(s);
198 remaining= FFMAX(remaining, 0);
201 if (s->maxsize>= 0 && remaining+1 < size) {
202 av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1);
209 /* Read the data in sane-sized chunks and append to pkt.
210 * Return the number of bytes read or an error. */
211 static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
213 int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
214 int orig_size = pkt->size;
218 int prev_size = pkt->size;
221 /* When the caller requests a lot of data, limit it to the amount
222 * left in file or SANE_CHUNK_SIZE when it is not known. */
224 if (read_size > SANE_CHUNK_SIZE/10) {
225 read_size = ffio_limit(s, read_size);
226 // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
228 read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
231 ret = av_grow_packet(pkt, read_size);
235 ret = avio_read(s, pkt->data + prev_size, read_size);
236 if (ret != read_size) {
237 av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
244 pkt->flags |= AV_PKT_FLAG_CORRUPT;
248 av_packet_unref(pkt);
249 return pkt->size > orig_size ? pkt->size - orig_size : ret;
252 int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
257 pkt->pos = avio_tell(s);
259 return append_packet_chunked(s, pkt, size);
262 int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
265 return av_get_packet(s, pkt, size);
266 return append_packet_chunked(s, pkt, size);
269 int av_filename_number_test(const char *filename)
273 (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
276 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
279 static const struct {
282 enum AVMediaType type;
284 { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
285 { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
286 { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
287 { "dvbsub", AV_CODEC_ID_DVB_SUBTITLE,AVMEDIA_TYPE_SUBTITLE },
288 { "dvbtxt", AV_CODEC_ID_DVB_TELETEXT,AVMEDIA_TYPE_SUBTITLE },
289 { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
290 { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
291 { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO },
292 { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
293 { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
294 { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
295 { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
296 { "truehd", AV_CODEC_ID_TRUEHD, AVMEDIA_TYPE_AUDIO },
300 AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score);
302 if (fmt && st->request_probe <= score) {
304 av_log(s, AV_LOG_DEBUG,
305 "Probe with size=%d, packets=%d detected %s with score=%d\n",
306 pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
308 for (i = 0; fmt_id_type[i].name; i++) {
309 if (!strcmp(fmt->name, fmt_id_type[i].name)) {
310 st->codec->codec_id = fmt_id_type[i].id;
311 st->codec->codec_type = fmt_id_type[i].type;
319 /************************************************************/
320 /* input media file */
322 int av_demuxer_open(AVFormatContext *ic) {
325 if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) {
326 av_log(ic, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", ic->format_whitelist);
327 return AVERROR(EINVAL);
330 if (ic->iformat->read_header) {
331 err = ic->iformat->read_header(ic);
336 if (ic->pb && !ic->internal->data_offset)
337 ic->internal->data_offset = avio_tell(ic->pb);
342 /* Open input file and probe the format if necessary. */
343 static int init_input(AVFormatContext *s, const char *filename,
344 AVDictionary **options)
347 AVProbeData pd = { filename, NULL, 0 };
348 int score = AVPROBE_SCORE_RETRY;
351 s->flags |= AVFMT_FLAG_CUSTOM_IO;
353 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
354 s, 0, s->format_probesize);
355 else if (s->iformat->flags & AVFMT_NOFILE)
356 av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and "
357 "will be ignored with AVFMT_NOFILE format.\n");
361 if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
362 (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score))))
365 if ((ret = s->io_open(s, &s->pb, filename, AVIO_FLAG_READ | s->avio_flags, options)) < 0)
370 return av_probe_input_buffer2(s->pb, &s->iformat, filename,
371 s, 0, s->format_probesize);
374 static int add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
375 AVPacketList **plast_pktl, int ref)
377 AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
381 return AVERROR(ENOMEM);
384 if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
393 (*plast_pktl)->next = pktl;
395 *packet_buffer = pktl;
397 /* Add the packet in the buffered packet list. */
402 int avformat_queue_attached_pictures(AVFormatContext *s)
405 for (i = 0; i < s->nb_streams; i++)
406 if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
407 s->streams[i]->discard < AVDISCARD_ALL) {
408 if (s->streams[i]->attached_pic.size <= 0) {
409 av_log(s, AV_LOG_WARNING,
410 "Attached picture on stream %d has invalid size, "
415 ret = add_to_pktbuf(&s->internal->raw_packet_buffer,
416 &s->streams[i]->attached_pic,
417 &s->internal->raw_packet_buffer_end, 1);
424 int avformat_open_input(AVFormatContext **ps, const char *filename,
425 AVInputFormat *fmt, AVDictionary **options)
427 AVFormatContext *s = *ps;
429 AVDictionary *tmp = NULL;
430 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
432 if (!s && !(s = avformat_alloc_context()))
433 return AVERROR(ENOMEM);
435 av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n");
436 return AVERROR(EINVAL);
442 av_dict_copy(&tmp, *options, 0);
444 if (s->pb) // must be before any goto fail
445 s->flags |= AVFMT_FLAG_CUSTOM_IO;
447 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
450 if ((ret = init_input(s, filename, &tmp)) < 0)
452 s->probe_score = ret;
454 if (!s->protocol_whitelist && s->pb && s->pb->protocol_whitelist) {
455 s->protocol_whitelist = av_strdup(s->pb->protocol_whitelist);
456 if (!s->protocol_whitelist) {
457 ret = AVERROR(ENOMEM);
462 if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) {
463 av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist);
464 ret = AVERROR(EINVAL);
468 avio_skip(s->pb, s->skip_initial_bytes);
470 /* Check filename in case an image number is expected. */
471 if (s->iformat->flags & AVFMT_NEEDNUMBER) {
472 if (!av_filename_number_test(filename)) {
473 ret = AVERROR(EINVAL);
478 s->duration = s->start_time = AV_NOPTS_VALUE;
479 av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
481 /* Allocate private data. */
482 if (s->iformat->priv_data_size > 0) {
483 if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
484 ret = AVERROR(ENOMEM);
487 if (s->iformat->priv_class) {
488 *(const AVClass **) s->priv_data = s->iformat->priv_class;
489 av_opt_set_defaults(s->priv_data);
490 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
495 /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
497 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0);
499 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header)
500 if ((ret = s->iformat->read_header(s)) < 0)
503 if (id3v2_extra_meta) {
504 if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") ||
505 !strcmp(s->iformat->name, "tta")) {
506 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
509 av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n");
511 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
513 if ((ret = avformat_queue_attached_pictures(s)) < 0)
516 if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->internal->data_offset)
517 s->internal->data_offset = avio_tell(s->pb);
519 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
522 av_dict_free(options);
529 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
531 if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
533 avformat_free_context(s);
538 /*******************************************************/
540 static void force_codec_ids(AVFormatContext *s, AVStream *st)
542 switch (st->codec->codec_type) {
543 case AVMEDIA_TYPE_VIDEO:
544 if (s->video_codec_id)
545 st->codec->codec_id = s->video_codec_id;
547 case AVMEDIA_TYPE_AUDIO:
548 if (s->audio_codec_id)
549 st->codec->codec_id = s->audio_codec_id;
551 case AVMEDIA_TYPE_SUBTITLE:
552 if (s->subtitle_codec_id)
553 st->codec->codec_id = s->subtitle_codec_id;
558 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
560 if (st->request_probe>0) {
561 AVProbeData *pd = &st->probe_data;
563 av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets);
567 uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE);
569 av_log(s, AV_LOG_WARNING,
570 "Failed to reallocate probe buffer for stream %d\n",
575 memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
576 pd->buf_size += pkt->size;
577 memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
580 st->probe_packets = 0;
582 av_log(s, AV_LOG_WARNING,
583 "nothing to probe for stream %d\n", st->index);
587 end= s->internal->raw_packet_buffer_remaining_size <= 0
588 || st->probe_packets<= 0;
590 if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
591 int score = set_codec_from_probe_data(s, st, pd);
592 if ( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY)
596 st->request_probe = -1;
597 if (st->codec->codec_id != AV_CODEC_ID_NONE) {
598 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
600 av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index);
602 force_codec_ids(s, st);
608 static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt)
610 int64_t ref = pkt->dts;
611 int i, pts_wrap_behavior;
612 int64_t pts_wrap_reference;
613 AVProgram *first_program;
615 if (ref == AV_NOPTS_VALUE)
617 if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow)
619 ref &= (1LL << st->pts_wrap_bits)-1;
621 // reference time stamp should be 60 s before first time stamp
622 pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num);
623 // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset
624 pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) ||
625 (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ?
626 AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET;
628 first_program = av_find_program_from_stream(s, NULL, stream_index);
630 if (!first_program) {
631 int default_stream_index = av_find_default_stream_index(s);
632 if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) {
633 for (i = 0; i < s->nb_streams; i++) {
634 if (av_find_program_from_stream(s, NULL, i))
636 s->streams[i]->pts_wrap_reference = pts_wrap_reference;
637 s->streams[i]->pts_wrap_behavior = pts_wrap_behavior;
641 st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference;
642 st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior;
646 AVProgram *program = first_program;
648 if (program->pts_wrap_reference != AV_NOPTS_VALUE) {
649 pts_wrap_reference = program->pts_wrap_reference;
650 pts_wrap_behavior = program->pts_wrap_behavior;
653 program = av_find_program_from_stream(s, program, stream_index);
656 // update every program with differing pts_wrap_reference
657 program = first_program;
659 if (program->pts_wrap_reference != pts_wrap_reference) {
660 for (i = 0; i<program->nb_stream_indexes; i++) {
661 s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference;
662 s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior;
665 program->pts_wrap_reference = pts_wrap_reference;
666 program->pts_wrap_behavior = pts_wrap_behavior;
668 program = av_find_program_from_stream(s, program, stream_index);
674 int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
680 AVPacketList *pktl = s->internal->raw_packet_buffer;
684 st = s->streams[pkt->stream_index];
685 if (s->internal->raw_packet_buffer_remaining_size <= 0)
686 if ((err = probe_codec(s, st, NULL)) < 0)
688 if (st->request_probe <= 0) {
689 s->internal->raw_packet_buffer = pktl->next;
690 s->internal->raw_packet_buffer_remaining_size += pkt->size;
699 ret = s->iformat->read_packet(s, pkt);
701 /* Some demuxers return FFERROR_REDO when they consume
702 data and discard it (ignored streams, junk, extradata).
703 We must re-call the demuxer to get the real packet. */
704 if (ret == FFERROR_REDO)
706 if (!pktl || ret == AVERROR(EAGAIN))
708 for (i = 0; i < s->nb_streams; i++) {
710 if (st->probe_packets)
711 if ((err = probe_codec(s, st, NULL)) < 0)
713 av_assert0(st->request_probe <= 0);
719 AVPacket tmp = { 0 };
720 ret = av_packet_ref(&tmp, pkt);
726 if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
727 (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
728 av_log(s, AV_LOG_WARNING,
729 "Dropped corrupted packet (stream = %d)\n",
731 av_packet_unref(pkt);
735 if (pkt->stream_index >= (unsigned)s->nb_streams) {
736 av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index);
740 st = s->streams[pkt->stream_index];
742 if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) {
743 // correct first time stamps to negative values
744 if (!is_relative(st->first_dts))
745 st->first_dts = wrap_timestamp(st, st->first_dts);
746 if (!is_relative(st->start_time))
747 st->start_time = wrap_timestamp(st, st->start_time);
748 if (!is_relative(st->cur_dts))
749 st->cur_dts = wrap_timestamp(st, st->cur_dts);
752 pkt->dts = wrap_timestamp(st, pkt->dts);
753 pkt->pts = wrap_timestamp(st, pkt->pts);
755 force_codec_ids(s, st);
757 /* TODO: audio: time filter; video: frame reordering (pts != dts) */
758 if (s->use_wallclock_as_timestamps)
759 pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base);
761 if (!pktl && st->request_probe <= 0)
764 err = add_to_pktbuf(&s->internal->raw_packet_buffer, pkt,
765 &s->internal->raw_packet_buffer_end, 0);
768 s->internal->raw_packet_buffer_remaining_size -= pkt->size;
770 if ((err = probe_codec(s, st, pkt)) < 0)
776 /**********************************************************/
778 static int determinable_frame_size(AVCodecContext *avctx)
780 if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/
781 avctx->codec_id == AV_CODEC_ID_MP1 ||
782 avctx->codec_id == AV_CODEC_ID_MP2 ||
783 avctx->codec_id == AV_CODEC_ID_MP3/* ||
784 avctx->codec_id == AV_CODEC_ID_CELT*/)
790 * Return the frame duration in seconds. Return 0 if not available.
792 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
793 AVCodecParserContext *pc, AVPacket *pkt)
795 AVRational codec_framerate = s->iformat ? st->codec->framerate :
796 av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
801 switch (st->codec->codec_type) {
802 case AVMEDIA_TYPE_VIDEO:
803 if (st->r_frame_rate.num && !pc && s->iformat) {
804 *pnum = st->r_frame_rate.den;
805 *pden = st->r_frame_rate.num;
806 } else if (st->time_base.num * 1000LL > st->time_base.den) {
807 *pnum = st->time_base.num;
808 *pden = st->time_base.den;
809 } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
810 av_assert0(st->codec->ticks_per_frame);
811 av_reduce(pnum, pden,
813 codec_framerate.num * (int64_t)st->codec->ticks_per_frame,
816 if (pc && pc->repeat_pict) {
817 av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case
818 av_reduce(pnum, pden,
819 (*pnum) * (1LL + pc->repeat_pict),
823 /* If this codec can be interlaced or progressive then we need
824 * a parser to compute duration of a packet. Thus if we have
825 * no parser in such case leave duration undefined. */
826 if (st->codec->ticks_per_frame > 1 && !pc)
830 case AVMEDIA_TYPE_AUDIO:
831 frame_size = av_get_audio_frame_duration(st->codec, pkt->size);
832 if (frame_size <= 0 || st->codec->sample_rate <= 0)
835 *pden = st->codec->sample_rate;
842 static int is_intra_only(AVCodecContext *enc) {
843 const AVCodecDescriptor *desc;
845 if (enc->codec_type != AVMEDIA_TYPE_VIDEO)
848 desc = av_codec_get_codec_descriptor(enc);
850 desc = avcodec_descriptor_get(enc->codec_id);
851 av_codec_set_codec_descriptor(enc, desc);
854 return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY);
858 static int has_decode_delay_been_guessed(AVStream *st)
860 if (st->codec->codec_id != AV_CODEC_ID_H264) return 1;
861 if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy
863 #if CONFIG_H264_DECODER
864 if (st->codec->has_b_frames &&
865 avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames)
868 if (st->codec->has_b_frames<3)
869 return st->nb_decoded_frames >= 7;
870 else if (st->codec->has_b_frames<4)
871 return st->nb_decoded_frames >= 18;
873 return st->nb_decoded_frames >= 20;
876 static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl)
880 if (pktl == s->internal->packet_buffer_end)
881 return s->internal->parse_queue;
885 static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
886 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
887 st->codec->codec_id != AV_CODEC_ID_HEVC;
890 int delay = st->codec->has_b_frames;
893 if (dts == AV_NOPTS_VALUE) {
894 int64_t best_score = INT64_MAX;
895 for (i = 0; i<delay; i++) {
896 if (st->pts_reorder_error_count[i]) {
897 int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
898 if (score < best_score) {
905 for (i = 0; i<delay; i++) {
906 if (pts_buffer[i] != AV_NOPTS_VALUE) {
907 int64_t diff = FFABS(pts_buffer[i] - dts)
908 + (uint64_t)st->pts_reorder_error[i];
909 diff = FFMAX(diff, st->pts_reorder_error[i]);
910 st->pts_reorder_error[i] = diff;
911 st->pts_reorder_error_count[i]++;
912 if (st->pts_reorder_error_count[i] > 250) {
913 st->pts_reorder_error[i] >>= 1;
914 st->pts_reorder_error_count[i] >>= 1;
921 if (dts == AV_NOPTS_VALUE)
927 static void update_initial_timestamps(AVFormatContext *s, int stream_index,
928 int64_t dts, int64_t pts, AVPacket *pkt)
930 AVStream *st = s->streams[stream_index];
931 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
932 int64_t pts_buffer[MAX_REORDER_DELAY+1];
936 if (st->first_dts != AV_NOPTS_VALUE ||
937 dts == AV_NOPTS_VALUE ||
938 st->cur_dts == AV_NOPTS_VALUE ||
942 delay = st->codec->has_b_frames;
943 st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE);
945 shift = (uint64_t)st->first_dts - RELATIVE_TS_BASE;
947 for (i = 0; i<MAX_REORDER_DELAY+1; i++)
948 pts_buffer[i] = AV_NOPTS_VALUE;
950 if (is_relative(pts))
953 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
954 if (pktl->pkt.stream_index != stream_index)
956 if (is_relative(pktl->pkt.pts))
957 pktl->pkt.pts += shift;
959 if (is_relative(pktl->pkt.dts))
960 pktl->pkt.dts += shift;
962 if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
963 st->start_time = pktl->pkt.pts;
965 if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
966 pts_buffer[0] = pktl->pkt.pts;
967 for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++)
968 FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]);
970 pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
974 if (st->start_time == AV_NOPTS_VALUE)
975 st->start_time = pts;
978 static void update_initial_durations(AVFormatContext *s, AVStream *st,
979 int stream_index, int duration)
981 AVPacketList *pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
982 int64_t cur_dts = RELATIVE_TS_BASE;
984 if (st->first_dts != AV_NOPTS_VALUE) {
985 if (st->update_initial_durations_done)
987 st->update_initial_durations_done = 1;
988 cur_dts = st->first_dts;
989 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
990 if (pktl->pkt.stream_index == stream_index) {
991 if (pktl->pkt.pts != pktl->pkt.dts ||
992 pktl->pkt.dts != AV_NOPTS_VALUE ||
998 if (pktl && pktl->pkt.dts != st->first_dts) {
999 av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %"PRId64") in the queue\n",
1000 av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration);
1004 av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts));
1007 pktl = s->internal->packet_buffer ? s->internal->packet_buffer : s->internal->parse_queue;
1008 st->first_dts = cur_dts;
1009 } else if (st->cur_dts != RELATIVE_TS_BASE)
1012 for (; pktl; pktl = get_next_pkt(s, st, pktl)) {
1013 if (pktl->pkt.stream_index != stream_index)
1015 if (pktl->pkt.pts == pktl->pkt.dts &&
1016 (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) &&
1017 !pktl->pkt.duration) {
1018 pktl->pkt.dts = cur_dts;
1019 if (!st->codec->has_b_frames)
1020 pktl->pkt.pts = cur_dts;
1021 // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
1022 pktl->pkt.duration = duration;
1025 cur_dts = pktl->pkt.dts + pktl->pkt.duration;
1028 st->cur_dts = cur_dts;
1031 static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
1032 AVCodecParserContext *pc, AVPacket *pkt,
1033 int64_t next_dts, int64_t next_pts)
1035 int num, den, presentation_delayed, delay, i;
1037 AVRational duration;
1038 int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
1039 st->codec->codec_id != AV_CODEC_ID_HEVC;
1041 if (s->flags & AVFMT_FLAG_NOFILLIN)
1044 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
1045 if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
1046 if (st->last_dts_for_order_check <= pkt->dts) {
1049 av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
1050 "DTS %"PRIi64" < %"PRIi64" out of order\n",
1052 st->last_dts_for_order_check);
1053 st->dts_misordered++;
1055 if (st->dts_ordered + st->dts_misordered > 250) {
1056 st->dts_ordered >>= 1;
1057 st->dts_misordered >>= 1;
1061 st->last_dts_for_order_check = pkt->dts;
1062 if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
1063 pkt->dts = AV_NOPTS_VALUE;
1066 if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
1067 pkt->dts = AV_NOPTS_VALUE;
1069 if (pc && pc->pict_type == AV_PICTURE_TYPE_B
1070 && !st->codec->has_b_frames)
1071 //FIXME Set low_delay = 0 when has_b_frames = 1
1072 st->codec->has_b_frames = 1;
1074 /* do we have a video B-frame ? */
1075 delay = st->codec->has_b_frames;
1076 presentation_delayed = 0;
1078 /* XXX: need has_b_frame, but cannot get it if the codec is
1079 * not initialized */
1081 pc && pc->pict_type != AV_PICTURE_TYPE_B)
1082 presentation_delayed = 1;
1084 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
1085 st->pts_wrap_bits < 63 &&
1086 pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
1087 if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) {
1088 pkt->dts -= 1LL << st->pts_wrap_bits;
1090 pkt->pts += 1LL << st->pts_wrap_bits;
1093 /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
1094 * We take the conservative approach and discard both.
1095 * Note: If this is misbehaving for an H.264 file, then possibly
1096 * presentation_delayed is not set correctly. */
1097 if (delay == 1 && pkt->dts == pkt->pts &&
1098 pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
1099 av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
1100 if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")
1101 && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism
1102 pkt->dts = AV_NOPTS_VALUE;
1105 duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base);
1106 if (pkt->duration == 0) {
1107 ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
1109 duration = (AVRational) {num, den};
1110 pkt->duration = av_rescale_rnd(1,
1111 num * (int64_t) st->time_base.den,
1112 den * (int64_t) st->time_base.num,
1117 if (pkt->duration != 0 && (s->internal->packet_buffer || s->internal->parse_queue))
1118 update_initial_durations(s, st, pkt->stream_index, pkt->duration);
1120 /* Correct timestamps with byte offset if demuxers only have timestamps
1121 * on packet boundaries */
1122 if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
1123 /* this will estimate bitrate based on this frame's duration and size */
1124 offset = av_rescale(pc->offset, pkt->duration, pkt->size);
1125 if (pkt->pts != AV_NOPTS_VALUE)
1127 if (pkt->dts != AV_NOPTS_VALUE)
1131 /* This may be redundant, but it should not hurt. */
1132 if (pkt->dts != AV_NOPTS_VALUE &&
1133 pkt->pts != AV_NOPTS_VALUE &&
1134 pkt->pts > pkt->dts)
1135 presentation_delayed = 1;
1137 if (s->debug & FF_FDEBUG_TS)
1138 av_log(s, AV_LOG_TRACE,
1139 "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%"PRId64" delay:%d onein_oneout:%d\n",
1140 presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts),
1141 pkt->stream_index, pc, pkt->duration, delay, onein_oneout);
1143 /* Interpolate PTS and DTS if they are not present. We skip H264
1144 * currently because delay and has_b_frames are not reliably set. */
1145 if ((delay == 0 || (delay == 1 && pc)) &&
1147 if (presentation_delayed) {
1148 /* DTS = decompression timestamp */
1149 /* PTS = presentation timestamp */
1150 if (pkt->dts == AV_NOPTS_VALUE)
1151 pkt->dts = st->last_IP_pts;
1152 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1153 if (pkt->dts == AV_NOPTS_VALUE)
1154 pkt->dts = st->cur_dts;
1156 /* This is tricky: the dts must be incremented by the duration
1157 * of the frame we are displaying, i.e. the last I- or P-frame. */
1158 if (st->last_IP_duration == 0)
1159 st->last_IP_duration = pkt->duration;
1160 if (pkt->dts != AV_NOPTS_VALUE)
1161 st->cur_dts = pkt->dts + st->last_IP_duration;
1162 if (pkt->dts != AV_NOPTS_VALUE &&
1163 pkt->pts == AV_NOPTS_VALUE &&
1164 st->last_IP_duration > 0 &&
1165 ((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 &&
1166 next_dts != next_pts &&
1167 next_pts != AV_NOPTS_VALUE)
1168 pkt->pts = next_dts;
1170 st->last_IP_duration = pkt->duration;
1171 st->last_IP_pts = pkt->pts;
1172 /* Cannot compute PTS if not present (we can compute it only
1173 * by knowing the future. */
1174 } else if (pkt->pts != AV_NOPTS_VALUE ||
1175 pkt->dts != AV_NOPTS_VALUE ||
1178 /* presentation is not delayed : PTS and DTS are the same */
1179 if (pkt->pts == AV_NOPTS_VALUE)
1180 pkt->pts = pkt->dts;
1181 update_initial_timestamps(s, pkt->stream_index, pkt->pts,
1183 if (pkt->pts == AV_NOPTS_VALUE)
1184 pkt->pts = st->cur_dts;
1185 pkt->dts = pkt->pts;
1186 if (pkt->pts != AV_NOPTS_VALUE)
1187 st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1);
1191 if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) {
1192 st->pts_buffer[0] = pkt->pts;
1193 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
1194 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
1196 pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
1198 // We skipped it above so we try here.
1200 // This should happen on the first packet
1201 update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt);
1202 if (pkt->dts > st->cur_dts)
1203 st->cur_dts = pkt->dts;
1205 if (s->debug & FF_FDEBUG_TS)
1206 av_log(s, AV_LOG_TRACE, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n",
1207 presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts));
1210 if (is_intra_only(st->codec))
1211 pkt->flags |= AV_PKT_FLAG_KEY;
1212 #if FF_API_CONVERGENCE_DURATION
1213 FF_DISABLE_DEPRECATION_WARNINGS
1215 pkt->convergence_duration = pc->convergence_duration;
1216 FF_ENABLE_DEPRECATION_WARNINGS
1220 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
1223 AVPacketList *pktl = *pkt_buf;
1224 *pkt_buf = pktl->next;
1225 av_packet_unref(&pktl->pkt);
1228 *pkt_buf_end = NULL;
1232 * Parse a packet, add all split parts to parse_queue.
1234 * @param pkt Packet to parse, NULL when flushing the parser at end of stream.
1236 static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
1238 AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
1239 AVStream *st = s->streams[stream_index];
1240 uint8_t *data = pkt ? pkt->data : NULL;
1241 int size = pkt ? pkt->size : 0;
1242 int ret = 0, got_output = 0;
1245 av_init_packet(&flush_pkt);
1248 } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) {
1249 // preserve 0-size sync packets
1250 compute_pkt_fields(s, st, st->parser, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1253 while (size > 0 || (pkt == &flush_pkt && got_output)) {
1255 int64_t next_pts = pkt->pts;
1256 int64_t next_dts = pkt->dts;
1258 av_init_packet(&out_pkt);
1259 len = av_parser_parse2(st->parser, st->codec,
1260 &out_pkt.data, &out_pkt.size, data, size,
1261 pkt->pts, pkt->dts, pkt->pos);
1263 pkt->pts = pkt->dts = AV_NOPTS_VALUE;
1265 /* increment read pointer */
1269 got_output = !!out_pkt.size;
1274 if (pkt->side_data) {
1275 out_pkt.side_data = pkt->side_data;
1276 out_pkt.side_data_elems = pkt->side_data_elems;
1277 pkt->side_data = NULL;
1278 pkt->side_data_elems = 0;
1281 /* set the duration */
1282 out_pkt.duration = (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->duration : 0;
1283 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1284 if (st->codec->sample_rate > 0) {
1286 av_rescale_q_rnd(st->parser->duration,
1287 (AVRational) { 1, st->codec->sample_rate },
1293 out_pkt.stream_index = st->index;
1294 out_pkt.pts = st->parser->pts;
1295 out_pkt.dts = st->parser->dts;
1296 out_pkt.pos = st->parser->pos;
1298 if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1299 out_pkt.pos = st->parser->frame_offset;
1301 if (st->parser->key_frame == 1 ||
1302 (st->parser->key_frame == -1 &&
1303 st->parser->pict_type == AV_PICTURE_TYPE_I))
1304 out_pkt.flags |= AV_PKT_FLAG_KEY;
1306 if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY))
1307 out_pkt.flags |= AV_PKT_FLAG_KEY;
1309 compute_pkt_fields(s, st, st->parser, &out_pkt, next_dts, next_pts);
1311 ret = add_to_pktbuf(&s->internal->parse_queue, &out_pkt,
1312 &s->internal->parse_queue_end, 1);
1313 av_packet_unref(&out_pkt);
1318 /* end of the stream => close and free the parser */
1319 if (pkt == &flush_pkt) {
1320 av_parser_close(st->parser);
1325 av_packet_unref(pkt);
1329 static int read_from_packet_buffer(AVPacketList **pkt_buffer,
1330 AVPacketList **pkt_buffer_end,
1334 av_assert0(*pkt_buffer);
1337 *pkt_buffer = pktl->next;
1339 *pkt_buffer_end = NULL;
1344 static int64_t ts_to_samples(AVStream *st, int64_t ts)
1346 return av_rescale(ts, st->time_base.num * st->codec->sample_rate, st->time_base.den);
1349 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
1351 int ret = 0, i, got_packet = 0;
1352 AVDictionary *metadata = NULL;
1354 av_init_packet(pkt);
1356 while (!got_packet && !s->internal->parse_queue) {
1360 /* read next packet */
1361 ret = ff_read_packet(s, &cur_pkt);
1363 if (ret == AVERROR(EAGAIN))
1365 /* flush the parsers */
1366 for (i = 0; i < s->nb_streams; i++) {
1368 if (st->parser && st->need_parsing)
1369 parse_packet(s, NULL, st->index);
1371 /* all remaining packets are now in parse_queue =>
1372 * really terminate parsing */
1376 st = s->streams[cur_pkt.stream_index];
1378 if (cur_pkt.pts != AV_NOPTS_VALUE &&
1379 cur_pkt.dts != AV_NOPTS_VALUE &&
1380 cur_pkt.pts < cur_pkt.dts) {
1381 av_log(s, AV_LOG_WARNING,
1382 "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n",
1383 cur_pkt.stream_index,
1384 av_ts2str(cur_pkt.pts),
1385 av_ts2str(cur_pkt.dts),
1388 if (s->debug & FF_FDEBUG_TS)
1389 av_log(s, AV_LOG_DEBUG,
1390 "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%"PRId64", flags=%d\n",
1391 cur_pkt.stream_index,
1392 av_ts2str(cur_pkt.pts),
1393 av_ts2str(cur_pkt.dts),
1394 cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
1396 if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
1397 st->parser = av_parser_init(st->codec->codec_id);
1399 av_log(s, AV_LOG_VERBOSE, "parser not found for codec "
1400 "%s, packets or times may be invalid.\n",
1401 avcodec_get_name(st->codec->codec_id));
1402 /* no parser available: just output the raw packets */
1403 st->need_parsing = AVSTREAM_PARSE_NONE;
1404 } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
1405 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1406 else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
1407 st->parser->flags |= PARSER_FLAG_ONCE;
1408 else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW)
1409 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
1412 if (!st->need_parsing || !st->parser) {
1413 /* no parsing needed: we just output the packet as is */
1415 compute_pkt_fields(s, st, NULL, pkt, AV_NOPTS_VALUE, AV_NOPTS_VALUE);
1416 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
1417 (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
1418 ff_reduce_index(s, st->index);
1419 av_add_index_entry(st, pkt->pos, pkt->dts,
1420 0, 0, AVINDEX_KEYFRAME);
1423 } else if (st->discard < AVDISCARD_ALL) {
1424 if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
1428 av_packet_unref(&cur_pkt);
1430 if (pkt->flags & AV_PKT_FLAG_KEY)
1431 st->skip_to_keyframe = 0;
1432 if (st->skip_to_keyframe) {
1433 av_packet_unref(&cur_pkt);
1441 if (!got_packet && s->internal->parse_queue)
1442 ret = read_from_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
1445 AVStream *st = s->streams[pkt->stream_index];
1446 int discard_padding = 0;
1447 if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) {
1448 int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0);
1449 int64_t sample = ts_to_samples(st, pts);
1450 int duration = ts_to_samples(st, pkt->duration);
1451 int64_t end_sample = sample + duration;
1452 if (duration > 0 && end_sample >= st->first_discard_sample &&
1453 sample < st->last_discard_sample)
1454 discard_padding = FFMIN(end_sample - st->first_discard_sample, duration);
1456 if (st->start_skip_samples && (pkt->pts == 0 || pkt->pts == RELATIVE_TS_BASE))
1457 st->skip_samples = st->start_skip_samples;
1458 if (st->skip_samples || discard_padding) {
1459 uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1461 AV_WL32(p, st->skip_samples);
1462 AV_WL32(p + 4, discard_padding);
1463 av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d / discard %d\n", st->skip_samples, discard_padding);
1465 st->skip_samples = 0;
1468 if (st->inject_global_side_data) {
1469 for (i = 0; i < st->nb_side_data; i++) {
1470 AVPacketSideData *src_sd = &st->side_data[i];
1473 if (av_packet_get_side_data(pkt, src_sd->type, NULL))
1476 dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size);
1478 av_log(s, AV_LOG_WARNING, "Could not inject global side data\n");
1482 memcpy(dst_data, src_sd->data, src_sd->size);
1484 st->inject_global_side_data = 0;
1487 if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA))
1488 av_packet_merge_side_data(pkt);
1491 av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
1493 s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
1494 av_dict_copy(&s->metadata, metadata, 0);
1495 av_dict_free(&metadata);
1496 av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
1499 if (s->debug & FF_FDEBUG_TS)
1500 av_log(s, AV_LOG_DEBUG,
1501 "read_frame_internal stream=%d, pts=%s, dts=%s, "
1502 "size=%d, duration=%"PRId64", flags=%d\n",
1504 av_ts2str(pkt->pts),
1505 av_ts2str(pkt->dts),
1506 pkt->size, pkt->duration, pkt->flags);
1511 int av_read_frame(AVFormatContext *s, AVPacket *pkt)
1513 const int genpts = s->flags & AVFMT_FLAG_GENPTS;
1519 ret = s->internal->packet_buffer
1520 ? read_from_packet_buffer(&s->internal->packet_buffer,
1521 &s->internal->packet_buffer_end, pkt)
1522 : read_frame_internal(s, pkt);
1529 AVPacketList *pktl = s->internal->packet_buffer;
1532 AVPacket *next_pkt = &pktl->pkt;
1534 if (next_pkt->dts != AV_NOPTS_VALUE) {
1535 int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
1536 // last dts seen for this stream. if any of packets following
1537 // current one had no dts, we will set this to AV_NOPTS_VALUE.
1538 int64_t last_dts = next_pkt->dts;
1539 while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
1540 if (pktl->pkt.stream_index == next_pkt->stream_index &&
1541 (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) {
1542 if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
1544 next_pkt->pts = pktl->pkt.dts;
1546 if (last_dts != AV_NOPTS_VALUE) {
1547 // Once last dts was set to AV_NOPTS_VALUE, we don't change it.
1548 last_dts = pktl->pkt.dts;
1553 if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) {
1554 // Fixing the last reference frame had none pts issue (For MXF etc).
1555 // We only do this when
1557 // 2. we are not able to resolve a pts value for current packet.
1558 // 3. the packets for this stream at the end of the files had valid dts.
1559 next_pkt->pts = last_dts + next_pkt->duration;
1561 pktl = s->internal->packet_buffer;
1564 /* read packet from packet buffer, if there is data */
1565 st = s->streams[next_pkt->stream_index];
1566 if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL &&
1567 next_pkt->dts != AV_NOPTS_VALUE && !eof)) {
1568 ret = read_from_packet_buffer(&s->internal->packet_buffer,
1569 &s->internal->packet_buffer_end, pkt);
1574 ret = read_frame_internal(s, pkt);
1576 if (pktl && ret != AVERROR(EAGAIN)) {
1583 ret = add_to_pktbuf(&s->internal->packet_buffer, pkt,
1584 &s->internal->packet_buffer_end, 1);
1585 av_packet_unref(pkt);
1592 st = s->streams[pkt->stream_index];
1593 if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) {
1594 ff_reduce_index(s, st->index);
1595 av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME);
1598 if (is_relative(pkt->dts))
1599 pkt->dts -= RELATIVE_TS_BASE;
1600 if (is_relative(pkt->pts))
1601 pkt->pts -= RELATIVE_TS_BASE;
1606 /* XXX: suppress the packet queue */
1607 static void flush_packet_queue(AVFormatContext *s)
1611 free_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end);
1612 free_packet_buffer(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
1613 free_packet_buffer(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
1615 s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
1618 /*******************************************************/
1621 int av_find_default_stream_index(AVFormatContext *s)
1625 int best_stream = 0;
1626 int best_score = INT_MIN;
1628 if (s->nb_streams <= 0)
1630 for (i = 0; i < s->nb_streams; i++) {
1633 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1634 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
1636 if (st->codec->width && st->codec->height)
1640 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1641 if (st->codec->sample_rate)
1644 if (st->codec_info_nb_frames)
1647 if (st->discard != AVDISCARD_ALL)
1650 if (score > best_score) {
1658 /** Flush the frame reader. */
1659 void ff_read_frame_flush(AVFormatContext *s)
1664 flush_packet_queue(s);
1666 /* Reset read state for each stream. */
1667 for (i = 0; i < s->nb_streams; i++) {
1671 av_parser_close(st->parser);
1674 st->last_IP_pts = AV_NOPTS_VALUE;
1675 st->last_dts_for_order_check = AV_NOPTS_VALUE;
1676 if (st->first_dts == AV_NOPTS_VALUE)
1677 st->cur_dts = RELATIVE_TS_BASE;
1679 /* We set the current DTS to an unspecified origin. */
1680 st->cur_dts = AV_NOPTS_VALUE;
1682 st->probe_packets = MAX_PROBE_PACKETS;
1684 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
1685 st->pts_buffer[j] = AV_NOPTS_VALUE;
1687 if (s->internal->inject_global_side_data)
1688 st->inject_global_side_data = 1;
1690 st->skip_samples = 0;
1694 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
1698 for (i = 0; i < s->nb_streams; i++) {
1699 AVStream *st = s->streams[i];
1702 av_rescale(timestamp,
1703 st->time_base.den * (int64_t) ref_st->time_base.num,
1704 st->time_base.num * (int64_t) ref_st->time_base.den);
1708 void ff_reduce_index(AVFormatContext *s, int stream_index)
1710 AVStream *st = s->streams[stream_index];
1711 unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
1713 if ((unsigned) st->nb_index_entries >= max_entries) {
1715 for (i = 0; 2 * i < st->nb_index_entries; i++)
1716 st->index_entries[i] = st->index_entries[2 * i];
1717 st->nb_index_entries = i;
1721 int ff_add_index_entry(AVIndexEntry **index_entries,
1722 int *nb_index_entries,
1723 unsigned int *index_entries_allocated_size,
1724 int64_t pos, int64_t timestamp,
1725 int size, int distance, int flags)
1727 AVIndexEntry *entries, *ie;
1730 if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
1733 if (timestamp == AV_NOPTS_VALUE)
1734 return AVERROR(EINVAL);
1736 if (size < 0 || size > 0x3FFFFFFF)
1737 return AVERROR(EINVAL);
1739 if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known
1740 timestamp -= RELATIVE_TS_BASE;
1742 entries = av_fast_realloc(*index_entries,
1743 index_entries_allocated_size,
1744 (*nb_index_entries + 1) *
1745 sizeof(AVIndexEntry));
1749 *index_entries = entries;
1751 index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
1752 timestamp, AVSEEK_FLAG_ANY);
1755 index = (*nb_index_entries)++;
1756 ie = &entries[index];
1757 av_assert0(index == 0 || ie[-1].timestamp < timestamp);
1759 ie = &entries[index];
1760 if (ie->timestamp != timestamp) {
1761 if (ie->timestamp <= timestamp)
1763 memmove(entries + index + 1, entries + index,
1764 sizeof(AVIndexEntry) * (*nb_index_entries - index));
1765 (*nb_index_entries)++;
1766 } else if (ie->pos == pos && distance < ie->min_distance)
1767 // do not reduce the distance
1768 distance = ie->min_distance;
1772 ie->timestamp = timestamp;
1773 ie->min_distance = distance;
1780 int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1781 int size, int distance, int flags)
1783 timestamp = wrap_timestamp(st, timestamp);
1784 return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
1785 &st->index_entries_allocated_size, pos,
1786 timestamp, size, distance, flags);
1789 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
1790 int64_t wanted_timestamp, int flags)
1798 // Optimize appending index entries at the end.
1799 if (b && entries[b - 1].timestamp < wanted_timestamp)
1804 timestamp = entries[m].timestamp;
1805 if (timestamp >= wanted_timestamp)
1807 if (timestamp <= wanted_timestamp)
1810 m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
1812 if (!(flags & AVSEEK_FLAG_ANY))
1813 while (m >= 0 && m < nb_entries &&
1814 !(entries[m].flags & AVINDEX_KEYFRAME))
1815 m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
1817 if (m == nb_entries)
1822 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
1825 int64_t pos_delta = 0;
1827 //We could use URLProtocol flags here but as many user applications do not use URLProtocols this would be unreliable
1828 const char *proto = avio_find_protocol_name(s->filename);
1831 av_log(s, AV_LOG_INFO,
1832 "Protocol name not provided, cannot determine if input is local or "
1833 "a network protocol, buffers and access patterns cannot be configured "
1834 "optimally without knowing the protocol\n");
1837 if (proto && !(strcmp(proto, "file") && strcmp(proto, "pipe") && strcmp(proto, "cache")))
1840 for (ist1 = 0; ist1 < s->nb_streams; ist1++) {
1841 AVStream *st1 = s->streams[ist1];
1842 for (ist2 = 0; ist2 < s->nb_streams; ist2++) {
1843 AVStream *st2 = s->streams[ist2];
1849 for (i1 = i2 = 0; i1 < st1->nb_index_entries; i1++) {
1850 AVIndexEntry *e1 = &st1->index_entries[i1];
1851 int64_t e1_pts = av_rescale_q(e1->timestamp, st1->time_base, AV_TIME_BASE_Q);
1853 skip = FFMAX(skip, e1->size);
1854 for (; i2 < st2->nb_index_entries; i2++) {
1855 AVIndexEntry *e2 = &st2->index_entries[i2];
1856 int64_t e2_pts = av_rescale_q(e2->timestamp, st2->time_base, AV_TIME_BASE_Q);
1857 if (e2_pts - e1_pts < time_tolerance)
1859 pos_delta = FFMAX(pos_delta, e1->pos - e2->pos);
1867 /* XXX This could be adjusted depending on protocol*/
1868 if (s->pb->buffer_size < pos_delta && pos_delta < (1<<24)) {
1869 av_log(s, AV_LOG_VERBOSE, "Reconfiguring buffers to size %"PRId64"\n", pos_delta);
1870 ffio_set_buf_size(s->pb, pos_delta);
1871 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, pos_delta/2);
1874 if (skip < (1<<23)) {
1875 s->pb->short_seek_threshold = FFMAX(s->pb->short_seek_threshold, skip);
1879 int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
1881 return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
1882 wanted_timestamp, flags);
1885 static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
1886 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1888 int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
1889 if (stream_index >= 0)
1890 ts = wrap_timestamp(s->streams[stream_index], ts);
1894 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
1895 int64_t target_ts, int flags)
1897 AVInputFormat *avif = s->iformat;
1898 int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
1899 int64_t ts_min, ts_max, ts;
1904 if (stream_index < 0)
1907 av_log(s, AV_LOG_TRACE, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts));
1910 ts_min = AV_NOPTS_VALUE;
1911 pos_limit = -1; // GCC falsely says it may be uninitialized.
1913 st = s->streams[stream_index];
1914 if (st->index_entries) {
1917 /* FIXME: Whole function must be checked for non-keyframe entries in
1918 * index case, especially read_timestamp(). */
1919 index = av_index_search_timestamp(st, target_ts,
1920 flags | AVSEEK_FLAG_BACKWARD);
1921 index = FFMAX(index, 0);
1922 e = &st->index_entries[index];
1924 if (e->timestamp <= target_ts || e->pos == e->min_distance) {
1926 ts_min = e->timestamp;
1927 av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%s\n",
1928 pos_min, av_ts2str(ts_min));
1930 av_assert1(index == 0);
1933 index = av_index_search_timestamp(st, target_ts,
1934 flags & ~AVSEEK_FLAG_BACKWARD);
1935 av_assert0(index < st->nb_index_entries);
1937 e = &st->index_entries[index];
1938 av_assert1(e->timestamp >= target_ts);
1940 ts_max = e->timestamp;
1941 pos_limit = pos_max - e->min_distance;
1942 av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
1943 " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max));
1947 pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
1948 ts_min, ts_max, flags, &ts, avif->read_timestamp);
1953 if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1956 ff_read_frame_flush(s);
1957 ff_update_cur_dts(s, st, ts);
1962 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
1963 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
1965 int64_t step = 1024;
1966 int64_t limit, ts_max;
1967 int64_t filesize = avio_size(s->pb);
1968 int64_t pos_max = filesize - 1;
1971 pos_max = FFMAX(0, (pos_max) - step);
1972 ts_max = ff_read_timestamp(s, stream_index,
1973 &pos_max, limit, read_timestamp);
1975 } while (ts_max == AV_NOPTS_VALUE && 2*limit > step);
1976 if (ts_max == AV_NOPTS_VALUE)
1980 int64_t tmp_pos = pos_max + 1;
1981 int64_t tmp_ts = ff_read_timestamp(s, stream_index,
1982 &tmp_pos, INT64_MAX, read_timestamp);
1983 if (tmp_ts == AV_NOPTS_VALUE)
1985 av_assert0(tmp_pos > pos_max);
1988 if (tmp_pos >= filesize)
2000 int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
2001 int64_t pos_min, int64_t pos_max, int64_t pos_limit,
2002 int64_t ts_min, int64_t ts_max,
2003 int flags, int64_t *ts_ret,
2004 int64_t (*read_timestamp)(struct AVFormatContext *, int,
2005 int64_t *, int64_t))
2012 av_log(s, AV_LOG_TRACE, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts));
2014 if (ts_min == AV_NOPTS_VALUE) {
2015 pos_min = s->internal->data_offset;
2016 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2017 if (ts_min == AV_NOPTS_VALUE)
2021 if (ts_min >= target_ts) {
2026 if (ts_max == AV_NOPTS_VALUE) {
2027 if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0)
2029 pos_limit = pos_max;
2032 if (ts_max <= target_ts) {
2037 av_assert0(ts_min < ts_max);
2040 while (pos_min < pos_limit) {
2041 av_log(s, AV_LOG_TRACE,
2042 "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n",
2043 pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max));
2044 av_assert0(pos_limit <= pos_max);
2046 if (no_change == 0) {
2047 int64_t approximate_keyframe_distance = pos_max - pos_limit;
2048 // interpolate position (better than dichotomy)
2049 pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
2051 pos_min - approximate_keyframe_distance;
2052 } else if (no_change == 1) {
2053 // bisection if interpolation did not change min / max pos last time
2054 pos = (pos_min + pos_limit) >> 1;
2056 /* linear search if bisection failed, can only happen if there
2057 * are very few or no keyframes between min/max */
2062 else if (pos > pos_limit)
2066 // May pass pos_limit instead of -1.
2067 ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp);
2072 av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s"
2073 " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n",
2074 pos_min, pos, pos_max,
2075 av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts),
2076 pos_limit, start_pos, no_change);
2077 if (ts == AV_NOPTS_VALUE) {
2078 av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
2081 if (target_ts <= ts) {
2082 pos_limit = start_pos - 1;
2086 if (target_ts >= ts) {
2092 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
2093 ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
2096 ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2098 ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp);
2099 av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %s<=%s<=%s\n",
2100 pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max));
2106 static int seek_frame_byte(AVFormatContext *s, int stream_index,
2107 int64_t pos, int flags)
2109 int64_t pos_min, pos_max;
2111 pos_min = s->internal->data_offset;
2112 pos_max = avio_size(s->pb) - 1;
2116 else if (pos > pos_max)
2119 avio_seek(s->pb, pos, SEEK_SET);
2121 s->io_repositioned = 1;
2126 static int seek_frame_generic(AVFormatContext *s, int stream_index,
2127 int64_t timestamp, int flags)
2134 st = s->streams[stream_index];
2136 index = av_index_search_timestamp(st, timestamp, flags);
2138 if (index < 0 && st->nb_index_entries &&
2139 timestamp < st->index_entries[0].timestamp)
2142 if (index < 0 || index == st->nb_index_entries - 1) {
2146 if (st->nb_index_entries) {
2147 av_assert0(st->index_entries);
2148 ie = &st->index_entries[st->nb_index_entries - 1];
2149 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2151 ff_update_cur_dts(s, st, ie->timestamp);
2153 if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
2159 read_status = av_read_frame(s, &pkt);
2160 } while (read_status == AVERROR(EAGAIN));
2161 if (read_status < 0)
2163 if (stream_index == pkt.stream_index && pkt.dts > timestamp) {
2164 if (pkt.flags & AV_PKT_FLAG_KEY) {
2165 av_packet_unref(&pkt);
2168 if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) {
2169 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);
2170 av_packet_unref(&pkt);
2174 av_packet_unref(&pkt);
2176 index = av_index_search_timestamp(st, timestamp, flags);
2181 ff_read_frame_flush(s);
2182 if (s->iformat->read_seek)
2183 if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
2185 ie = &st->index_entries[index];
2186 if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
2188 ff_update_cur_dts(s, st, ie->timestamp);
2193 static int seek_frame_internal(AVFormatContext *s, int stream_index,
2194 int64_t timestamp, int flags)
2199 if (flags & AVSEEK_FLAG_BYTE) {
2200 if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
2202 ff_read_frame_flush(s);
2203 return seek_frame_byte(s, stream_index, timestamp, flags);
2206 if (stream_index < 0) {
2207 stream_index = av_find_default_stream_index(s);
2208 if (stream_index < 0)
2211 st = s->streams[stream_index];
2212 /* timestamp for default must be expressed in AV_TIME_BASE units */
2213 timestamp = av_rescale(timestamp, st->time_base.den,
2214 AV_TIME_BASE * (int64_t) st->time_base.num);
2217 /* first, we try the format specific seek */
2218 if (s->iformat->read_seek) {
2219 ff_read_frame_flush(s);
2220 ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
2226 if (s->iformat->read_timestamp &&
2227 !(s->iformat->flags & AVFMT_NOBINSEARCH)) {
2228 ff_read_frame_flush(s);
2229 return ff_seek_frame_binary(s, stream_index, timestamp, flags);
2230 } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
2231 ff_read_frame_flush(s);
2232 return seek_frame_generic(s, stream_index, timestamp, flags);
2237 int av_seek_frame(AVFormatContext *s, int stream_index,
2238 int64_t timestamp, int flags)
2242 if (s->iformat->read_seek2 && !s->iformat->read_seek) {
2243 int64_t min_ts = INT64_MIN, max_ts = INT64_MAX;
2244 if ((flags & AVSEEK_FLAG_BACKWARD))
2248 return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts,
2249 flags & ~AVSEEK_FLAG_BACKWARD);
2252 ret = seek_frame_internal(s, stream_index, timestamp, flags);
2255 ret = avformat_queue_attached_pictures(s);
2260 int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
2261 int64_t ts, int64_t max_ts, int flags)
2263 if (min_ts > ts || max_ts < ts)
2265 if (stream_index < -1 || stream_index >= (int)s->nb_streams)
2266 return AVERROR(EINVAL);
2269 flags |= AVSEEK_FLAG_ANY;
2270 flags &= ~AVSEEK_FLAG_BACKWARD;
2272 if (s->iformat->read_seek2) {
2274 ff_read_frame_flush(s);
2276 if (stream_index == -1 && s->nb_streams == 1) {
2277 AVRational time_base = s->streams[0]->time_base;
2278 ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
2279 min_ts = av_rescale_rnd(min_ts, time_base.den,
2280 time_base.num * (int64_t)AV_TIME_BASE,
2281 AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
2282 max_ts = av_rescale_rnd(max_ts, time_base.den,
2283 time_base.num * (int64_t)AV_TIME_BASE,
2284 AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX);
2287 ret = s->iformat->read_seek2(s, stream_index, min_ts,
2291 ret = avformat_queue_attached_pictures(s);
2295 if (s->iformat->read_timestamp) {
2296 // try to seek via read_timestamp()
2299 // Fall back on old API if new is not implemented but old is.
2300 // Note the old API has somewhat different semantics.
2301 if (s->iformat->read_seek || 1) {
2302 int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0);
2303 int ret = av_seek_frame(s, stream_index, ts, flags | dir);
2304 if (ret<0 && ts != min_ts && max_ts != ts) {
2305 ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir);
2307 ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD));
2312 // try some generic seek like seek_frame_generic() but with new ts semantics
2313 return -1; //unreachable
2316 int avformat_flush(AVFormatContext *s)
2318 ff_read_frame_flush(s);
2322 /*******************************************************/
2325 * Return TRUE if the stream has accurate duration in any stream.
2327 * @return TRUE if the stream has accurate duration for at least one component.
2329 static int has_duration(AVFormatContext *ic)
2334 for (i = 0; i < ic->nb_streams; i++) {
2335 st = ic->streams[i];
2336 if (st->duration != AV_NOPTS_VALUE)
2339 if (ic->duration != AV_NOPTS_VALUE)
2345 * Estimate the stream timings from the one of each components.
2347 * Also computes the global bitrate if possible.
2349 static void update_stream_timings(AVFormatContext *ic)
2351 int64_t start_time, start_time1, start_time_text, end_time, end_time1;
2352 int64_t duration, duration1, filesize;
2357 start_time = INT64_MAX;
2358 start_time_text = INT64_MAX;
2359 end_time = INT64_MIN;
2360 duration = INT64_MIN;
2361 for (i = 0; i < ic->nb_streams; i++) {
2362 st = ic->streams[i];
2363 if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
2364 start_time1 = av_rescale_q(st->start_time, st->time_base,
2366 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2367 if (start_time1 < start_time_text)
2368 start_time_text = start_time1;
2370 start_time = FFMIN(start_time, start_time1);
2371 end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
2373 AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
2374 if (end_time1 != AV_NOPTS_VALUE) {
2375 end_time1 += start_time1;
2376 end_time = FFMAX(end_time, end_time1);
2378 for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) {
2379 if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1)
2380 p->start_time = start_time1;
2381 if (p->end_time < end_time1)
2382 p->end_time = end_time1;
2385 if (st->duration != AV_NOPTS_VALUE) {
2386 duration1 = av_rescale_q(st->duration, st->time_base,
2388 duration = FFMAX(duration, duration1);
2391 if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE))
2392 start_time = start_time_text;
2393 else if (start_time > start_time_text)
2394 av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE);
2396 if (start_time != INT64_MAX) {
2397 ic->start_time = start_time;
2398 if (end_time != INT64_MIN) {
2399 if (ic->nb_programs) {
2400 for (i = 0; i < ic->nb_programs; i++) {
2401 p = ic->programs[i];
2402 if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time)
2403 duration = FFMAX(duration, p->end_time - p->start_time);
2406 duration = FFMAX(duration, end_time - start_time);
2409 if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) {
2410 ic->duration = duration;
2412 if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
2413 /* compute the bitrate */
2414 double bitrate = (double) filesize * 8.0 * AV_TIME_BASE /
2415 (double) ic->duration;
2416 if (bitrate >= 0 && bitrate <= INT64_MAX)
2417 ic->bit_rate = bitrate;
2421 static void fill_all_stream_timings(AVFormatContext *ic)
2426 update_stream_timings(ic);
2427 for (i = 0; i < ic->nb_streams; i++) {
2428 st = ic->streams[i];
2429 if (st->start_time == AV_NOPTS_VALUE) {
2430 if (ic->start_time != AV_NOPTS_VALUE)
2431 st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
2433 if (ic->duration != AV_NOPTS_VALUE)
2434 st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
2440 static void estimate_timings_from_bit_rate(AVFormatContext *ic)
2442 int64_t filesize, duration;
2443 int i, show_warning = 0;
2446 /* if bit_rate is already set, we believe it */
2447 if (ic->bit_rate <= 0) {
2449 for (i = 0; i < ic->nb_streams; i++) {
2450 st = ic->streams[i];
2451 if (st->codec->bit_rate > 0) {
2452 if (INT_MAX - st->codec->bit_rate < bit_rate) {
2456 bit_rate += st->codec->bit_rate;
2457 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) {
2458 // If we have a videostream with packets but without a bitrate
2459 // then consider the sum not known
2464 ic->bit_rate = bit_rate;
2467 /* if duration is already set, we believe it */
2468 if (ic->duration == AV_NOPTS_VALUE &&
2469 ic->bit_rate != 0) {
2470 filesize = ic->pb ? avio_size(ic->pb) : 0;
2471 if (filesize > ic->internal->data_offset) {
2472 filesize -= ic->internal->data_offset;
2473 for (i = 0; i < ic->nb_streams; i++) {
2474 st = ic->streams[i];
2475 if ( st->time_base.num <= INT64_MAX / ic->bit_rate
2476 && st->duration == AV_NOPTS_VALUE) {
2477 duration = av_rescale(8 * filesize, st->time_base.den,
2479 (int64_t) st->time_base.num);
2480 st->duration = duration;
2487 av_log(ic, AV_LOG_WARNING,
2488 "Estimating duration from bitrate, this may be inaccurate\n");
2491 #define DURATION_MAX_READ_SIZE 250000LL
2492 #define DURATION_MAX_RETRY 6
2494 /* only usable for MPEG-PS streams */
2495 static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
2497 AVPacket pkt1, *pkt = &pkt1;
2499 int num, den, read_size, i, ret;
2500 int found_duration = 0;
2502 int64_t filesize, offset, duration;
2505 /* flush packet queue */
2506 flush_packet_queue(ic);
2508 for (i = 0; i < ic->nb_streams; i++) {
2509 st = ic->streams[i];
2510 if (st->start_time == AV_NOPTS_VALUE &&
2511 st->first_dts == AV_NOPTS_VALUE &&
2512 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN)
2513 av_log(st->codec, AV_LOG_WARNING,
2514 "start time for stream %d is not set in estimate_timings_from_pts\n", i);
2517 av_parser_close(st->parser);
2522 av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN);
2523 /* estimate the end time (duration) */
2524 /* XXX: may need to support wrapping */
2525 filesize = ic->pb ? avio_size(ic->pb) : 0;
2527 is_end = found_duration;
2528 offset = filesize - (DURATION_MAX_READ_SIZE << retry);
2532 avio_seek(ic->pb, offset, SEEK_SET);
2535 if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
2539 ret = ff_read_packet(ic, pkt);
2540 } while (ret == AVERROR(EAGAIN));
2543 read_size += pkt->size;
2544 st = ic->streams[pkt->stream_index];
2545 if (pkt->pts != AV_NOPTS_VALUE &&
2546 (st->start_time != AV_NOPTS_VALUE ||
2547 st->first_dts != AV_NOPTS_VALUE)) {
2548 if (pkt->duration == 0) {
2549 ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt);
2551 pkt->duration = av_rescale_rnd(1,
2552 num * (int64_t) st->time_base.den,
2553 den * (int64_t) st->time_base.num,
2557 duration = pkt->pts + pkt->duration;
2559 if (st->start_time != AV_NOPTS_VALUE)
2560 duration -= st->start_time;
2562 duration -= st->first_dts;
2564 if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 ||
2565 (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num))
2566 st->duration = duration;
2567 st->info->last_duration = duration;
2570 av_packet_unref(pkt);
2573 /* check if all audio/video streams have valid duration */
2576 for (i = 0; i < ic->nb_streams; i++) {
2577 st = ic->streams[i];
2578 switch (st->codec->codec_type) {
2579 case AVMEDIA_TYPE_VIDEO:
2580 case AVMEDIA_TYPE_AUDIO:
2581 if (st->duration == AV_NOPTS_VALUE)
2588 ++retry <= DURATION_MAX_RETRY);
2590 av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN);
2592 /* warn about audio/video streams which duration could not be estimated */
2593 for (i = 0; i < ic->nb_streams; i++) {
2594 st = ic->streams[i];
2595 if (st->duration == AV_NOPTS_VALUE) {
2596 switch (st->codec->codec_type) {
2597 case AVMEDIA_TYPE_VIDEO:
2598 case AVMEDIA_TYPE_AUDIO:
2599 if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) {
2600 av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i);
2602 av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i);
2606 fill_all_stream_timings(ic);
2608 avio_seek(ic->pb, old_offset, SEEK_SET);
2609 for (i = 0; i < ic->nb_streams; i++) {
2612 st = ic->streams[i];
2613 st->cur_dts = st->first_dts;
2614 st->last_IP_pts = AV_NOPTS_VALUE;
2615 st->last_dts_for_order_check = AV_NOPTS_VALUE;
2616 for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
2617 st->pts_buffer[j] = AV_NOPTS_VALUE;
2621 static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
2625 /* get the file size, if possible */
2626 if (ic->iformat->flags & AVFMT_NOFILE) {
2629 file_size = avio_size(ic->pb);
2630 file_size = FFMAX(0, file_size);
2633 if ((!strcmp(ic->iformat->name, "mpeg") ||
2634 !strcmp(ic->iformat->name, "mpegts")) &&
2635 file_size && ic->pb->seekable) {
2636 /* get accurate estimate from the PTSes */
2637 estimate_timings_from_pts(ic, old_offset);
2638 ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS;
2639 } else if (has_duration(ic)) {
2640 /* at least one component has timings - we use them for all
2642 fill_all_stream_timings(ic);
2643 ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
2645 /* less precise: use bitrate info */
2646 estimate_timings_from_bit_rate(ic);
2647 ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE;
2649 update_stream_timings(ic);
2653 AVStream av_unused *st;
2654 for (i = 0; i < ic->nb_streams; i++) {
2655 st = ic->streams[i];
2656 av_log(ic, AV_LOG_TRACE, "%d: start_time: %0.3f duration: %0.3f\n", i,
2657 (double) st->start_time / AV_TIME_BASE,
2658 (double) st->duration / AV_TIME_BASE);
2660 av_log(ic, AV_LOG_TRACE,
2661 "stream: start_time: %0.3f duration: %0.3f bitrate=%"PRId64" kb/s\n",
2662 (double) ic->start_time / AV_TIME_BASE,
2663 (double) ic->duration / AV_TIME_BASE,
2664 (int64_t)ic->bit_rate / 1000);
2668 static int has_codec_parameters(AVStream *st, const char **errmsg_ptr)
2670 AVCodecContext *avctx = st->codec;
2672 #define FAIL(errmsg) do { \
2674 *errmsg_ptr = errmsg; \
2678 if ( avctx->codec_id == AV_CODEC_ID_NONE
2679 && avctx->codec_type != AVMEDIA_TYPE_DATA)
2680 FAIL("unknown codec");
2681 switch (avctx->codec_type) {
2682 case AVMEDIA_TYPE_AUDIO:
2683 if (!avctx->frame_size && determinable_frame_size(avctx))
2684 FAIL("unspecified frame size");
2685 if (st->info->found_decoder >= 0 &&
2686 avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
2687 FAIL("unspecified sample format");
2688 if (!avctx->sample_rate)
2689 FAIL("unspecified sample rate");
2690 if (!avctx->channels)
2691 FAIL("unspecified number of channels");
2692 if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS)
2693 FAIL("no decodable DTS frames");
2695 case AVMEDIA_TYPE_VIDEO:
2697 FAIL("unspecified size");
2698 if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
2699 FAIL("unspecified pixel format");
2700 if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40)
2701 if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames)
2702 FAIL("no frame in rv30/40 and no sar");
2704 case AVMEDIA_TYPE_SUBTITLE:
2705 if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width)
2706 FAIL("unspecified size");
2708 case AVMEDIA_TYPE_DATA:
2709 if (avctx->codec_id == AV_CODEC_ID_NONE) return 1;
2715 /* returns 1 or 0 if or if not decoded data was returned, or a negative error */
2716 static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
2717 AVDictionary **options)
2719 const AVCodec *codec;
2720 int got_picture = 1, ret = 0;
2721 AVFrame *frame = av_frame_alloc();
2722 AVSubtitle subtitle;
2723 AVPacket pkt = *avpkt;
2724 int do_skip_frame = 0;
2725 enum AVDiscard skip_frame;
2728 return AVERROR(ENOMEM);
2730 if (!avcodec_is_open(st->codec) &&
2731 st->info->found_decoder <= 0 &&
2732 (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) {
2733 AVDictionary *thread_opt = NULL;
2735 codec = find_decoder(s, st, st->codec->codec_id);
2738 st->info->found_decoder = -st->codec->codec_id;
2743 /* Force thread count to 1 since the H.264 decoder will not extract
2744 * SPS and PPS to extradata during multi-threaded decoding. */
2745 av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
2746 if (s->codec_whitelist)
2747 av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0);
2748 ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt);
2750 av_dict_free(&thread_opt);
2752 st->info->found_decoder = -st->codec->codec_id;
2755 st->info->found_decoder = 1;
2756 } else if (!st->info->found_decoder)
2757 st->info->found_decoder = 1;
2759 if (st->info->found_decoder < 0) {
2764 if (st->codec->codec->caps_internal & FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM) {
2766 skip_frame = st->codec->skip_frame;
2767 st->codec->skip_frame = AVDISCARD_ALL;
2770 while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
2772 (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) ||
2773 (!st->codec_info_nb_frames &&
2774 (st->codec->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)))) {
2776 switch (st->codec->codec_type) {
2777 case AVMEDIA_TYPE_VIDEO:
2778 ret = avcodec_decode_video2(st->codec, frame,
2779 &got_picture, &pkt);
2781 case AVMEDIA_TYPE_AUDIO:
2782 ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt);
2784 case AVMEDIA_TYPE_SUBTITLE:
2785 ret = avcodec_decode_subtitle2(st->codec, &subtitle,
2786 &got_picture, &pkt);
2794 st->nb_decoded_frames++;
2801 if (!pkt.data && !got_picture)
2805 if (do_skip_frame) {
2806 st->codec->skip_frame = skip_frame;
2809 av_frame_free(&frame);
2813 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
2815 while (tags->id != AV_CODEC_ID_NONE) {
2823 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
2826 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2827 if (tag == tags[i].tag)
2829 for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
2830 if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
2832 return AV_CODEC_ID_NONE;
2835 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
2840 return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
2842 return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
2844 return AV_CODEC_ID_NONE;
2849 if (sflags & (1 << (bps - 1))) {
2852 return AV_CODEC_ID_PCM_S8;
2854 return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
2856 return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
2858 return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
2860 return AV_CODEC_ID_NONE;
2865 return AV_CODEC_ID_PCM_U8;
2867 return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
2869 return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
2871 return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
2873 return AV_CODEC_ID_NONE;
2879 unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
2882 if (!av_codec_get_tag2(tags, id, &tag))
2887 int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id,
2891 for (i = 0; tags && tags[i]; i++) {
2892 const AVCodecTag *codec_tags = tags[i];
2893 while (codec_tags->id != AV_CODEC_ID_NONE) {
2894 if (codec_tags->id == id) {
2895 *tag = codec_tags->tag;
2904 enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
2907 for (i = 0; tags && tags[i]; i++) {
2908 enum AVCodecID id = ff_codec_get_id(tags[i], tag);
2909 if (id != AV_CODEC_ID_NONE)
2912 return AV_CODEC_ID_NONE;
2915 static void compute_chapters_end(AVFormatContext *s)
2918 int64_t max_time = 0;
2920 if (s->duration > 0)
2921 max_time = s->duration +
2922 ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
2924 for (i = 0; i < s->nb_chapters; i++)
2925 if (s->chapters[i]->end == AV_NOPTS_VALUE) {
2926 AVChapter *ch = s->chapters[i];
2927 int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
2931 for (j = 0; j < s->nb_chapters; j++) {
2932 AVChapter *ch1 = s->chapters[j];
2933 int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
2935 if (j != i && next_start > ch->start && next_start < end)
2938 ch->end = (end == INT64_MAX) ? ch->start : end;
2942 static int get_std_framerate(int i)
2945 return (i + 1) * 1001;
2949 return (i + 31) * 1001 * 12;
2953 return ((const int[]) { 80, 120, 240})[i] * 1001 * 12;
2957 return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12;
2960 /* Is the time base unreliable?
2961 * This is a heuristic to balance between quick acceptance of the values in
2962 * the headers vs. some extra checks.
2963 * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps.
2964 * MPEG-2 commonly misuses field repeat flags to store different framerates.
2965 * And there are "variable" fps files this needs to detect as well. */
2966 static int tb_unreliable(AVCodecContext *c)
2968 if (c->time_base.den >= 101LL * c->time_base.num ||
2969 c->time_base.den < 5LL * c->time_base.num ||
2970 // c->codec_tag == AV_RL32("DIVX") ||
2971 // c->codec_tag == AV_RL32("XVID") ||
2972 c->codec_tag == AV_RL32("mp4v") ||
2973 c->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
2974 c->codec_id == AV_CODEC_ID_GIF ||
2975 c->codec_id == AV_CODEC_ID_HEVC ||
2976 c->codec_id == AV_CODEC_ID_H264)
2981 int ff_alloc_extradata(AVCodecContext *avctx, int size)
2985 if (size < 0 || size >= INT32_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
2986 avctx->extradata = NULL;
2987 avctx->extradata_size = 0;
2988 return AVERROR(EINVAL);
2990 avctx->extradata = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
2991 if (avctx->extradata) {
2992 memset(avctx->extradata + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2993 avctx->extradata_size = size;
2996 avctx->extradata_size = 0;
2997 ret = AVERROR(ENOMEM);
3002 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
3004 int ret = ff_alloc_extradata(avctx, size);
3007 ret = avio_read(pb, avctx->extradata, size);
3009 av_freep(&avctx->extradata);
3010 avctx->extradata_size = 0;
3011 av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size);
3012 return ret < 0 ? ret : AVERROR_INVALIDDATA;
3018 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts)
3021 int64_t last = st->info->last_dts;
3023 if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last
3024 && ts - (uint64_t)last < INT64_MAX) {
3025 double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base);
3026 int64_t duration = ts - last;
3028 if (!st->info->duration_error)
3029 st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2);
3030 if (!st->info->duration_error)
3031 return AVERROR(ENOMEM);
3033 // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3034 // av_log(NULL, AV_LOG_ERROR, "%f\n", dts);
3035 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3036 if (st->info->duration_error[0][1][i] < 1e10) {
3037 int framerate = get_std_framerate(i);
3038 double sdts = dts*framerate/(1001*12);
3039 for (j= 0; j<2; j++) {
3040 int64_t ticks = llrint(sdts+j*0.5);
3041 double error= sdts - ticks + j*0.5;
3042 st->info->duration_error[j][0][i] += error;
3043 st->info->duration_error[j][1][i] += error*error;
3047 st->info->duration_count++;
3048 st->info->rfps_duration_sum += duration;
3050 if (st->info->duration_count % 10 == 0) {
3051 int n = st->info->duration_count;
3052 for (i = 0; i<MAX_STD_TIMEBASES; i++) {
3053 if (st->info->duration_error[0][1][i] < 1e10) {
3054 double a0 = st->info->duration_error[0][0][i] / n;
3055 double error0 = st->info->duration_error[0][1][i] / n - a0*a0;
3056 double a1 = st->info->duration_error[1][0][i] / n;
3057 double error1 = st->info->duration_error[1][1][i] / n - a1*a1;
3058 if (error0 > 0.04 && error1 > 0.04) {
3059 st->info->duration_error[0][1][i] = 2e10;
3060 st->info->duration_error[1][1][i] = 2e10;
3066 // ignore the first 4 values, they might have some random jitter
3067 if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last))
3068 st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration);
3070 if (ts != AV_NOPTS_VALUE)
3071 st->info->last_dts = ts;
3076 void ff_rfps_calculate(AVFormatContext *ic)
3080 for (i = 0; i < ic->nb_streams; i++) {
3081 AVStream *st = ic->streams[i];
3083 if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO)
3085 // the check for tb_unreliable() is not completely correct, since this is not about handling
3086 // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g.
3087 // ipmovie.c produces.
3088 if (tb_unreliable(st->codec) && 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)
3089 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);
3090 if (st->info->duration_count>1 && !st->r_frame_rate.num
3091 && tb_unreliable(st->codec)) {
3093 double best_error= 0.01;
3094 AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base);
3096 for (j= 0; j<MAX_STD_TIMEBASES; j++) {
3099 if (st->info->codec_info_duration &&
3100 st->info->codec_info_duration*av_q2d(st->time_base) < (1001*11.5)/get_std_framerate(j))
3102 if (!st->info->codec_info_duration && get_std_framerate(j) < 1001*12)
3105 if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j))
3108 for (k= 0; k<2; k++) {
3109 int n = st->info->duration_count;
3110 double a= st->info->duration_error[k][0][j] / n;
3111 double error= st->info->duration_error[k][1][j]/n - a*a;
3113 if (error < best_error && best_error> 0.000000001) {
3115 num = get_std_framerate(j);
3118 av_log(ic, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error);
3121 // do not increase frame rate by more than 1 % in order to match a standard rate.
3122 if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate)))
3123 av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX);
3125 if ( !st->avg_frame_rate.num
3126 && st->r_frame_rate.num && st->info->rfps_duration_sum
3127 && st->info->codec_info_duration <= 0
3128 && st->info->duration_count > 2
3129 && 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
3131 av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n");
3132 st->avg_frame_rate = st->r_frame_rate;
3135 av_freep(&st->info->duration_error);
3136 st->info->last_dts = AV_NOPTS_VALUE;
3137 st->info->duration_count = 0;
3138 st->info->rfps_duration_sum = 0;
3142 int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
3144 int i, count, ret = 0, j;
3147 AVPacket pkt1, *pkt;
3148 int64_t old_offset = avio_tell(ic->pb);
3149 // new streams might appear, no options for those
3150 int orig_nb_streams = ic->nb_streams;
3152 int64_t max_analyze_duration = ic->max_analyze_duration;
3153 int64_t max_stream_analyze_duration;
3154 int64_t max_subtitle_analyze_duration;
3155 int64_t probesize = ic->probesize;
3157 flush_codecs = probesize > 0;
3159 av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN);
3161 max_stream_analyze_duration = max_analyze_duration;
3162 max_subtitle_analyze_duration = max_analyze_duration;
3163 if (!max_analyze_duration) {
3164 max_stream_analyze_duration =
3165 max_analyze_duration = 5*AV_TIME_BASE;
3166 max_subtitle_analyze_duration = 30*AV_TIME_BASE;
3167 if (!strcmp(ic->iformat->name, "flv"))
3168 max_stream_analyze_duration = 90*AV_TIME_BASE;
3172 av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n",
3173 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count);
3175 for (i = 0; i < ic->nb_streams; i++) {
3176 const AVCodec *codec;
3177 AVDictionary *thread_opt = NULL;
3178 st = ic->streams[i];
3180 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3181 st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
3182 /* if (!st->time_base.num)
3184 if (!st->codec->time_base.num)
3185 st->codec->time_base = st->time_base;
3187 // only for the split stuff
3188 if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE) && st->request_probe <= 0) {
3189 st->parser = av_parser_init(st->codec->codec_id);
3191 if (st->need_parsing == AVSTREAM_PARSE_HEADERS) {
3192 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
3193 } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) {
3194 st->parser->flags |= PARSER_FLAG_USE_CODEC_TS;
3196 } else if (st->need_parsing) {
3197 av_log(ic, AV_LOG_VERBOSE, "parser not found for codec "
3198 "%s, packets or times may be invalid.\n",
3199 avcodec_get_name(st->codec->codec_id));
3202 codec = find_decoder(ic, st, st->codec->codec_id);
3204 /* Force thread count to 1 since the H.264 decoder will not extract
3205 * SPS and PPS to extradata during multi-threaded decoding. */
3206 av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
3208 if (ic->codec_whitelist)
3209 av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0);
3211 /* Ensure that subtitle_header is properly set. */
3212 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
3213 && codec && !st->codec->codec) {
3214 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3215 av_log(ic, AV_LOG_WARNING,
3216 "Failed to open codec in av_find_stream_info\n");
3219 // Try to just open decoders, in case this is enough to get parameters.
3220 if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) {
3221 if (codec && !st->codec->codec)
3222 if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0)
3223 av_log(ic, AV_LOG_WARNING,
3224 "Failed to open codec in av_find_stream_info\n");
3227 av_dict_free(&thread_opt);
3230 for (i = 0; i < ic->nb_streams; i++) {
3231 #if FF_API_R_FRAME_RATE
3232 ic->streams[i]->info->last_dts = AV_NOPTS_VALUE;
3234 ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
3235 ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
3241 int analyzed_all_streams;
3242 if (ff_check_interrupt(&ic->interrupt_callback)) {
3244 av_log(ic, AV_LOG_DEBUG, "interrupted\n");
3248 /* check if one codec still needs to be handled */
3249 for (i = 0; i < ic->nb_streams; i++) {
3250 int fps_analyze_framecount = 20;
3252 st = ic->streams[i];
3253 if (!has_codec_parameters(st, NULL))
3255 /* If the timebase is coarse (like the usual millisecond precision
3256 * of mkv), we need to analyze more frames to reliably arrive at
3257 * the correct fps. */
3258 if (av_q2d(st->time_base) > 0.0005)
3259 fps_analyze_framecount *= 2;
3260 if (!tb_unreliable(st->codec))
3261 fps_analyze_framecount = 0;
3262 if (ic->fps_probe_size >= 0)
3263 fps_analyze_framecount = ic->fps_probe_size;
3264 if (st->disposition & AV_DISPOSITION_ATTACHED_PIC)
3265 fps_analyze_framecount = 0;
3266 /* variable fps and no guess at the real fps */
3267 if (!(st->r_frame_rate.num && st->avg_frame_rate.num) &&
3268 st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3269 int count = (ic->iformat->flags & AVFMT_NOTIMESTAMPS) ?
3270 st->info->codec_info_duration_fields/2 :
3271 st->info->duration_count;
3272 if (count < fps_analyze_framecount)
3275 if (st->parser && st->parser->parser->split &&
3276 !st->codec->extradata)
3278 if (st->first_dts == AV_NOPTS_VALUE &&
3279 !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) &&
3280 st->codec_info_nb_frames < ic->max_ts_probe &&
3281 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
3282 st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
3285 analyzed_all_streams = 0;
3286 if (i == ic->nb_streams) {
3287 analyzed_all_streams = 1;
3288 /* NOTE: If the format has no header, then we need to read some
3289 * packets to get most of the streams, so we cannot stop here. */
3290 if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
3291 /* If we found the info for all the codecs, we can stop. */
3293 av_log(ic, AV_LOG_DEBUG, "All info found\n");
3298 /* We did not get all the codec info, but we read too much data. */
3299 if (read_size >= probesize) {
3301 av_log(ic, AV_LOG_DEBUG,
3302 "Probe buffer size limit of %"PRId64" bytes reached\n", probesize);
3303 for (i = 0; i < ic->nb_streams; i++)
3304 if (!ic->streams[i]->r_frame_rate.num &&
3305 ic->streams[i]->info->duration_count <= 1 &&
3306 ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
3307 strcmp(ic->iformat->name, "image2"))
3308 av_log(ic, AV_LOG_WARNING,
3309 "Stream #%d: not enough frames to estimate rate; "
3310 "consider increasing probesize\n", i);
3314 /* NOTE: A new stream can be added there if no header in file
3315 * (AVFMTCTX_NOHEADER). */
3316 ret = read_frame_internal(ic, &pkt1);
3317 if (ret == AVERROR(EAGAIN))
3327 if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
3328 ret = add_to_pktbuf(&ic->internal->packet_buffer, pkt,
3329 &ic->internal->packet_buffer_end, 0);
3331 goto find_stream_info_err;
3334 st = ic->streams[pkt->stream_index];
3335 if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC))
3336 read_size += pkt->size;
3338 if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
3339 /* check for non-increasing dts */
3340 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3341 st->info->fps_last_dts >= pkt->dts) {
3342 av_log(ic, AV_LOG_DEBUG,
3343 "Non-increasing DTS in stream %d: packet %d with DTS "
3344 "%"PRId64", packet %d with DTS %"PRId64"\n",
3345 st->index, st->info->fps_last_dts_idx,
3346 st->info->fps_last_dts, st->codec_info_nb_frames,
3348 st->info->fps_first_dts =
3349 st->info->fps_last_dts = AV_NOPTS_VALUE;
3351 /* Check for a discontinuity in dts. If the difference in dts
3352 * is more than 1000 times the average packet duration in the
3353 * sequence, we treat it as a discontinuity. */
3354 if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
3355 st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
3356 (pkt->dts - st->info->fps_last_dts) / 1000 >
3357 (st->info->fps_last_dts - st->info->fps_first_dts) /
3358 (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
3359 av_log(ic, AV_LOG_WARNING,
3360 "DTS discontinuity in stream %d: packet %d with DTS "
3361 "%"PRId64", packet %d with DTS %"PRId64"\n",
3362 st->index, st->info->fps_last_dts_idx,
3363 st->info->fps_last_dts, st->codec_info_nb_frames,
3365 st->info->fps_first_dts =
3366 st->info->fps_last_dts = AV_NOPTS_VALUE;
3369 /* update stored dts values */
3370 if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
3371 st->info->fps_first_dts = pkt->dts;
3372 st->info->fps_first_dts_idx = st->codec_info_nb_frames;
3374 st->info->fps_last_dts = pkt->dts;
3375 st->info->fps_last_dts_idx = st->codec_info_nb_frames;
3377 if (st->codec_info_nb_frames>1) {
3381 if (st->time_base.den > 0)
3382 t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q);
3383 if (st->avg_frame_rate.num > 0)
3384 t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q));
3387 && st->codec_info_nb_frames>30
3388 && st->info->fps_first_dts != AV_NOPTS_VALUE
3389 && st->info->fps_last_dts != AV_NOPTS_VALUE)
3390 t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q));
3392 if (analyzed_all_streams) limit = max_analyze_duration;
3393 else if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) limit = max_subtitle_analyze_duration;
3394 else limit = max_stream_analyze_duration;
3397 av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds st:%d\n",
3399 t, pkt->stream_index);
3400 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3401 av_packet_unref(pkt);
3404 if (pkt->duration) {
3405 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE && pkt->pts != AV_NOPTS_VALUE && pkt->pts >= st->start_time) {
3406 st->info->codec_info_duration = FFMIN(pkt->pts - st->start_time, st->info->codec_info_duration + pkt->duration);
3408 st->info->codec_info_duration += pkt->duration;
3409 st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2;
3412 #if FF_API_R_FRAME_RATE
3413 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
3414 ff_rfps_add_frame(ic, st, pkt->dts);
3416 if (st->parser && st->parser->parser->split && !st->codec->extradata) {
3417 int i = st->parser->parser->split(st->codec, pkt->data, pkt->size);
3418 if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
3419 if (ff_alloc_extradata(st->codec, i))
3420 return AVERROR(ENOMEM);
3421 memcpy(st->codec->extradata, pkt->data,
3422 st->codec->extradata_size);
3426 /* If still no information, we try to open the codec and to
3427 * decompress the frame. We try to avoid that in most cases as
3428 * it takes longer and uses more memory. For MPEG-4, we need to
3429 * decompress for QuickTime.
3431 * If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
3432 * least one frame of codec data, this makes sure the codec initializes
3433 * the channel configuration and does not only trust the values from
3435 try_decode_frame(ic, st, pkt,
3436 (options && i < orig_nb_streams) ? &options[i] : NULL);
3438 if (ic->flags & AVFMT_FLAG_NOBUFFER)
3439 av_packet_unref(pkt);
3441 st->codec_info_nb_frames++;
3446 AVPacket empty_pkt = { 0 };
3448 av_init_packet(&empty_pkt);
3450 for (i = 0; i < ic->nb_streams; i++) {
3452 st = ic->streams[i];
3454 /* flush the decoders */
3455 if (st->info->found_decoder == 1) {
3457 err = try_decode_frame(ic, st, &empty_pkt,
3458 (options && i < orig_nb_streams)
3459 ? &options[i] : NULL);
3460 } while (err > 0 && !has_codec_parameters(st, NULL));
3463 av_log(ic, AV_LOG_INFO,
3464 "decoding for stream %d failed\n", st->index);
3470 // close codecs which were opened in try_decode_frame()
3471 for (i = 0; i < ic->nb_streams; i++) {
3472 st = ic->streams[i];
3473 avcodec_close(st->codec);
3476 ff_rfps_calculate(ic);
3478 for (i = 0; i < ic->nb_streams; i++) {
3479 st = ic->streams[i];
3480 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
3481 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) {
3482 uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt);
3483 if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt)
3484 st->codec->codec_tag= tag;
3487 /* estimate average framerate if not set by demuxer */
3488 if (st->info->codec_info_duration_fields &&
3489 !st->avg_frame_rate.num &&
3490 st->info->codec_info_duration) {
3492 double best_error = 0.01;
3494 if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2||
3495 st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den ||
3496 st->info->codec_info_duration < 0)
3498 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3499 st->info->codec_info_duration_fields * (int64_t) st->time_base.den,
3500 st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000);
3502 /* Round guessed framerate to a "standard" framerate if it's
3503 * within 1% of the original estimate. */
3504 for (j = 0; j < MAX_STD_TIMEBASES; j++) {
3505 AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
3506 double error = fabs(av_q2d(st->avg_frame_rate) /
3507 av_q2d(std_fps) - 1);
3509 if (error < best_error) {
3511 best_fps = std_fps.num;
3515 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
3516 best_fps, 12 * 1001, INT_MAX);
3519 if (!st->r_frame_rate.num) {
3520 if ( st->codec->time_base.den * (int64_t) st->time_base.num
3521 <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) {
3522 st->r_frame_rate.num = st->codec->time_base.den;
3523 st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame;
3525 st->r_frame_rate.num = st->time_base.den;
3526 st->r_frame_rate.den = st->time_base.num;
3529 if (st->display_aspect_ratio.num && st->display_aspect_ratio.den) {
3530 AVRational hw_ratio = { st->codec->height, st->codec->width };
3531 st->sample_aspect_ratio = av_mul_q(st->display_aspect_ratio,
3534 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3535 if (!st->codec->bits_per_coded_sample)
3536 st->codec->bits_per_coded_sample =
3537 av_get_bits_per_sample(st->codec->codec_id);
3538 // set stream disposition based on audio service type
3539 switch (st->codec->audio_service_type) {
3540 case AV_AUDIO_SERVICE_TYPE_EFFECTS:
3541 st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
3543 case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
3544 st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
3546 case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
3547 st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
3549 case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
3550 st->disposition = AV_DISPOSITION_COMMENT;
3552 case AV_AUDIO_SERVICE_TYPE_KARAOKE:
3553 st->disposition = AV_DISPOSITION_KARAOKE;
3560 estimate_timings(ic, old_offset);
3562 av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN);
3564 if (ret >= 0 && ic->nb_streams)
3565 /* We could not have all the codec parameters before EOF. */
3567 for (i = 0; i < ic->nb_streams; i++) {
3569 st = ic->streams[i];
3570 if (!has_codec_parameters(st, &errmsg)) {
3572 avcodec_string(buf, sizeof(buf), st->codec, 0);
3573 av_log(ic, AV_LOG_WARNING,
3574 "Could not find codec parameters for stream %d (%s): %s\n"
3575 "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n",
3582 compute_chapters_end(ic);
3584 find_stream_info_err:
3585 for (i = 0; i < ic->nb_streams; i++) {
3586 st = ic->streams[i];
3587 if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
3588 ic->streams[i]->codec->thread_count = 0;
3590 av_freep(&st->info->duration_error);
3591 av_freep(&ic->streams[i]->info);
3594 av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n",
3595 avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count);
3599 AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s)
3603 for (i = 0; i < ic->nb_programs; i++) {
3604 if (ic->programs[i] == last) {
3608 for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
3609 if (ic->programs[i]->stream_index[j] == s)
3610 return ic->programs[i];
3616 int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
3617 int wanted_stream_nb, int related_stream,
3618 AVCodec **decoder_ret, int flags)
3620 int i, nb_streams = ic->nb_streams;
3621 int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe;
3622 unsigned *program = NULL;
3623 const AVCodec *decoder = NULL, *best_decoder = NULL;
3625 if (related_stream >= 0 && wanted_stream_nb < 0) {
3626 AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream);
3628 program = p->stream_index;
3629 nb_streams = p->nb_stream_indexes;
3632 for (i = 0; i < nb_streams; i++) {
3633 int real_stream_index = program ? program[i] : i;
3634 AVStream *st = ic->streams[real_stream_index];
3635 AVCodecContext *avctx = st->codec;
3636 if (avctx->codec_type != type)
3638 if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
3640 if (wanted_stream_nb != real_stream_index &&
3641 st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
3642 AV_DISPOSITION_VISUAL_IMPAIRED))
3644 if (type == AVMEDIA_TYPE_AUDIO && !(avctx->channels && avctx->sample_rate))
3647 decoder = find_decoder(ic, st, st->codec->codec_id);
3650 ret = AVERROR_DECODER_NOT_FOUND;
3654 count = st->codec_info_nb_frames;
3655 bitrate = avctx->bit_rate;
3657 bitrate = avctx->rc_max_rate;
3658 multiframe = FFMIN(5, count);
3659 if ((best_multiframe > multiframe) ||
3660 (best_multiframe == multiframe && best_bitrate > bitrate) ||
3661 (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count))
3664 best_bitrate = bitrate;
3665 best_multiframe = multiframe;
3666 ret = real_stream_index;
3667 best_decoder = decoder;
3668 if (program && i == nb_streams - 1 && ret < 0) {
3670 nb_streams = ic->nb_streams;
3671 /* no related stream found, try again with everything */
3676 *decoder_ret = (AVCodec*)best_decoder;
3680 /*******************************************************/
3682 int av_read_play(AVFormatContext *s)
3684 if (s->iformat->read_play)
3685 return s->iformat->read_play(s);
3687 return avio_pause(s->pb, 0);
3688 return AVERROR(ENOSYS);
3691 int av_read_pause(AVFormatContext *s)
3693 if (s->iformat->read_pause)
3694 return s->iformat->read_pause(s);
3696 return avio_pause(s->pb, 1);
3697 return AVERROR(ENOSYS);
3700 static void free_stream(AVStream **pst)
3702 AVStream *st = *pst;
3708 for (i = 0; i < st->nb_side_data; i++)
3709 av_freep(&st->side_data[i].data);
3710 av_freep(&st->side_data);
3713 av_parser_close(st->parser);
3715 if (st->attached_pic.data)
3716 av_packet_unref(&st->attached_pic);
3718 av_freep(&st->internal);
3720 av_dict_free(&st->metadata);
3721 av_freep(&st->probe_data.buf);
3722 av_freep(&st->index_entries);
3723 av_freep(&st->codec->extradata);
3724 av_freep(&st->codec->subtitle_header);
3725 av_freep(&st->codec);
3726 av_freep(&st->priv_data);
3728 av_freep(&st->info->duration_error);
3729 av_freep(&st->info);
3730 av_freep(&st->recommended_encoder_configuration);
3731 av_freep(&st->priv_pts);
3736 void ff_free_stream(AVFormatContext *s, AVStream *st)
3738 av_assert0(s->nb_streams>0);
3739 av_assert0(s->streams[ s->nb_streams - 1 ] == st);
3741 free_stream(&s->streams[ --s->nb_streams ]);
3744 void avformat_free_context(AVFormatContext *s)
3752 if (s->iformat && s->iformat->priv_class && s->priv_data)
3753 av_opt_free(s->priv_data);
3754 if (s->oformat && s->oformat->priv_class && s->priv_data)
3755 av_opt_free(s->priv_data);
3757 for (i = s->nb_streams - 1; i >= 0; i--)
3758 ff_free_stream(s, s->streams[i]);
3761 for (i = s->nb_programs - 1; i >= 0; i--) {
3762 av_dict_free(&s->programs[i]->metadata);
3763 av_freep(&s->programs[i]->stream_index);
3764 av_freep(&s->programs[i]);
3766 av_freep(&s->programs);
3767 av_freep(&s->priv_data);
3768 while (s->nb_chapters--) {
3769 av_dict_free(&s->chapters[s->nb_chapters]->metadata);
3770 av_freep(&s->chapters[s->nb_chapters]);
3772 av_freep(&s->chapters);
3773 av_dict_free(&s->metadata);
3774 av_freep(&s->streams);
3775 av_freep(&s->internal);
3776 flush_packet_queue(s);
3780 void avformat_close_input(AVFormatContext **ps)
3791 if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) ||
3792 (s->flags & AVFMT_FLAG_CUSTOM_IO))
3795 flush_packet_queue(s);
3798 if (s->iformat->read_close)
3799 s->iformat->read_close(s);
3801 avformat_free_context(s);
3808 AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
3814 if (s->nb_streams >= INT_MAX/sizeof(*streams))
3816 streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams));
3819 s->streams = streams;
3821 st = av_mallocz(sizeof(AVStream));
3824 if (!(st->info = av_mallocz(sizeof(*st->info)))) {
3828 st->info->last_dts = AV_NOPTS_VALUE;
3830 st->codec = avcodec_alloc_context3(c);
3837 st->internal = av_mallocz(sizeof(*st->internal));
3842 /* no default bitrate if decoding */
3843 st->codec->bit_rate = 0;
3845 /* default pts setting is MPEG-like */
3846 avpriv_set_pts_info(st, 33, 1, 90000);
3847 /* we set the current DTS to 0 so that formats without any timestamps
3848 * but durations get some timestamps, formats with some unknown
3849 * timestamps have their first few packets buffered and the
3850 * timestamps corrected before they are returned to the user */
3851 st->cur_dts = RELATIVE_TS_BASE;
3853 st->cur_dts = AV_NOPTS_VALUE;
3856 st->index = s->nb_streams;
3857 st->start_time = AV_NOPTS_VALUE;
3858 st->duration = AV_NOPTS_VALUE;
3859 st->first_dts = AV_NOPTS_VALUE;
3860 st->probe_packets = MAX_PROBE_PACKETS;
3861 st->pts_wrap_reference = AV_NOPTS_VALUE;
3862 st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3864 st->last_IP_pts = AV_NOPTS_VALUE;
3865 st->last_dts_for_order_check = AV_NOPTS_VALUE;
3866 for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
3867 st->pts_buffer[i] = AV_NOPTS_VALUE;
3869 st->sample_aspect_ratio = (AVRational) { 0, 1 };
3871 #if FF_API_R_FRAME_RATE
3872 st->info->last_dts = AV_NOPTS_VALUE;
3874 st->info->fps_first_dts = AV_NOPTS_VALUE;
3875 st->info->fps_last_dts = AV_NOPTS_VALUE;
3877 st->inject_global_side_data = s->internal->inject_global_side_data;
3879 s->streams[s->nb_streams++] = st;
3886 AVProgram *av_new_program(AVFormatContext *ac, int id)
3888 AVProgram *program = NULL;
3891 av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
3893 for (i = 0; i < ac->nb_programs; i++)
3894 if (ac->programs[i]->id == id)
3895 program = ac->programs[i];
3898 program = av_mallocz(sizeof(AVProgram));
3901 dynarray_add(&ac->programs, &ac->nb_programs, program);
3902 program->discard = AVDISCARD_NONE;
3905 program->pts_wrap_reference = AV_NOPTS_VALUE;
3906 program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
3908 program->start_time =
3909 program->end_time = AV_NOPTS_VALUE;
3914 AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
3915 int64_t start, int64_t end, const char *title)
3917 AVChapter *chapter = NULL;
3920 if (end != AV_NOPTS_VALUE && start > end) {
3921 av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start);
3925 for (i = 0; i < s->nb_chapters; i++)
3926 if (s->chapters[i]->id == id)
3927 chapter = s->chapters[i];
3930 chapter = av_mallocz(sizeof(AVChapter));
3933 dynarray_add(&s->chapters, &s->nb_chapters, chapter);
3935 av_dict_set(&chapter->metadata, "title", title, 0);
3937 chapter->time_base = time_base;
3938 chapter->start = start;
3944 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
3947 AVProgram *program = NULL;
3950 if (idx >= ac->nb_streams) {
3951 av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
3955 for (i = 0; i < ac->nb_programs; i++) {
3956 if (ac->programs[i]->id != progid)
3958 program = ac->programs[i];
3959 for (j = 0; j < program->nb_stream_indexes; j++)
3960 if (program->stream_index[j] == idx)
3963 tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int));
3966 program->stream_index = tmp;
3967 program->stream_index[program->nb_stream_indexes++] = idx;
3972 uint64_t ff_ntp_time(void)
3974 return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
3977 int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
3980 char *q, buf1[20], c;
3981 int nd, len, percentd_found;
3993 while (av_isdigit(*p))
3994 nd = nd * 10 + *p++ - '0';
3996 } while (av_isdigit(c));
4007 snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
4009 if ((q - buf + len) > buf_size - 1)
4011 memcpy(q, buf1, len);
4019 if ((q - buf) < buf_size - 1)
4023 if (!percentd_found)
4032 void av_url_split(char *proto, int proto_size,
4033 char *authorization, int authorization_size,
4034 char *hostname, int hostname_size,
4035 int *port_ptr, char *path, int path_size, const char *url)
4037 const char *p, *ls, *ls2, *at, *at2, *col, *brk;
4043 if (authorization_size > 0)
4044 authorization[0] = 0;
4045 if (hostname_size > 0)
4050 /* parse protocol */
4051 if ((p = strchr(url, ':'))) {
4052 av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
4059 /* no protocol means plain filename */
4060 av_strlcpy(path, url, path_size);
4064 /* separate path from hostname */
4065 ls = strchr(p, '/');
4066 ls2 = strchr(p, '?');
4070 ls = FFMIN(ls, ls2);
4072 av_strlcpy(path, ls, path_size);
4074 ls = &p[strlen(p)]; // XXX
4076 /* the rest is hostname, use that to parse auth/port */
4078 /* authorization (user[:pass]@hostname) */
4080 while ((at = strchr(p, '@')) && at < ls) {
4081 av_strlcpy(authorization, at2,
4082 FFMIN(authorization_size, at + 1 - at2));
4083 p = at + 1; /* skip '@' */
4086 if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
4088 av_strlcpy(hostname, p + 1,
4089 FFMIN(hostname_size, brk - p));
4090 if (brk[1] == ':' && port_ptr)
4091 *port_ptr = atoi(brk + 2);
4092 } else if ((col = strchr(p, ':')) && col < ls) {
4093 av_strlcpy(hostname, p,
4094 FFMIN(col + 1 - p, hostname_size));
4096 *port_ptr = atoi(col + 1);
4098 av_strlcpy(hostname, p,
4099 FFMIN(ls + 1 - p, hostname_size));
4103 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
4106 static const char hex_table_uc[16] = { '0', '1', '2', '3',
4109 'C', 'D', 'E', 'F' };
4110 static const char hex_table_lc[16] = { '0', '1', '2', '3',
4113 'c', 'd', 'e', 'f' };
4114 const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
4116 for (i = 0; i < s; i++) {
4117 buff[i * 2] = hex_table[src[i] >> 4];
4118 buff[i * 2 + 1] = hex_table[src[i] & 0xF];
4124 int ff_hex_to_data(uint8_t *data, const char *p)
4131 p += strspn(p, SPACE_CHARS);
4134 c = av_toupper((unsigned char) *p++);
4135 if (c >= '0' && c <= '9')
4137 else if (c >= 'A' && c <= 'F')
4152 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
4153 unsigned int pts_num, unsigned int pts_den)
4156 if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
4157 if (new_tb.num != pts_num)
4158 av_log(NULL, AV_LOG_DEBUG,
4159 "st:%d removing common factor %d from timebase\n",
4160 s->index, pts_num / new_tb.num);
4162 av_log(NULL, AV_LOG_WARNING,
4163 "st:%d has too large timebase, reducing\n", s->index);
4165 if (new_tb.num <= 0 || new_tb.den <= 0) {
4166 av_log(NULL, AV_LOG_ERROR,
4167 "Ignoring attempt to set invalid timebase %d/%d for st:%d\n",
4168 new_tb.num, new_tb.den,
4172 s->time_base = new_tb;
4173 av_codec_set_pkt_timebase(s->codec, new_tb);
4174 s->pts_wrap_bits = pts_wrap_bits;
4177 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
4180 const char *ptr = str;
4182 /* Parse key=value pairs. */
4185 char *dest = NULL, *dest_end;
4186 int key_len, dest_len = 0;
4188 /* Skip whitespace and potential commas. */
4189 while (*ptr && (av_isspace(*ptr) || *ptr == ','))
4196 if (!(ptr = strchr(key, '=')))
4199 key_len = ptr - key;
4201 callback_get_buf(context, key, key_len, &dest, &dest_len);
4202 dest_end = dest + dest_len - 1;
4206 while (*ptr && *ptr != '\"') {
4210 if (dest && dest < dest_end)
4214 if (dest && dest < dest_end)
4222 for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
4223 if (dest && dest < dest_end)
4231 int ff_find_stream_index(AVFormatContext *s, int id)
4234 for (i = 0; i < s->nb_streams; i++)
4235 if (s->streams[i]->id == id)
4240 int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
4244 unsigned int codec_tag;
4245 if (ofmt->query_codec)
4246 return ofmt->query_codec(codec_id, std_compliance);
4247 else if (ofmt->codec_tag)
4248 return !!av_codec_get_tag2(ofmt->codec_tag, codec_id, &codec_tag);
4249 else if (codec_id == ofmt->video_codec ||
4250 codec_id == ofmt->audio_codec ||
4251 codec_id == ofmt->subtitle_codec)
4254 return AVERROR_PATCHWELCOME;
4257 int avformat_network_init(void)
4261 ff_network_inited_globally = 1;
4262 if ((ret = ff_network_init()) < 0)
4264 if ((ret = ff_tls_init()) < 0)
4270 int avformat_network_deinit(void)
4275 ff_network_inited_globally = 0;
4280 int ff_add_param_change(AVPacket *pkt, int32_t channels,
4281 uint64_t channel_layout, int32_t sample_rate,
4282 int32_t width, int32_t height)
4288 return AVERROR(EINVAL);
4291 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
4293 if (channel_layout) {
4295 flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
4299 flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
4301 if (width || height) {
4303 flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
4305 data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
4307 return AVERROR(ENOMEM);
4308 bytestream_put_le32(&data, flags);
4310 bytestream_put_le32(&data, channels);
4312 bytestream_put_le64(&data, channel_layout);
4314 bytestream_put_le32(&data, sample_rate);
4315 if (width || height) {
4316 bytestream_put_le32(&data, width);
4317 bytestream_put_le32(&data, height);
4322 AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame)
4324 AVRational undef = {0, 1};
4325 AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef;
4326 AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef;
4327 AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio;
4329 av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den,
4330 stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX);
4331 if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0)
4332 stream_sample_aspect_ratio = undef;
4334 av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den,
4335 frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX);
4336 if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0)
4337 frame_sample_aspect_ratio = undef;
4339 if (stream_sample_aspect_ratio.num)
4340 return stream_sample_aspect_ratio;
4342 return frame_sample_aspect_ratio;
4345 AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame)
4347 AVRational fr = st->r_frame_rate;
4348 AVRational codec_fr = st->codec->framerate;
4349 AVRational avg_fr = st->avg_frame_rate;
4351 if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 &&
4352 av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) {
4357 if (st->codec->ticks_per_frame > 1) {
4358 if ( codec_fr.num > 0 && codec_fr.den > 0 &&
4359 (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))
4366 int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st,
4369 if (*spec <= '9' && *spec >= '0') /* opt:index */
4370 return strtol(spec, NULL, 0) == st->index;
4371 else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' ||
4372 *spec == 't' || *spec == 'V') { /* opt:[vasdtV] */
4373 enum AVMediaType type;
4377 case 'v': type = AVMEDIA_TYPE_VIDEO; break;
4378 case 'a': type = AVMEDIA_TYPE_AUDIO; break;
4379 case 's': type = AVMEDIA_TYPE_SUBTITLE; break;
4380 case 'd': type = AVMEDIA_TYPE_DATA; break;
4381 case 't': type = AVMEDIA_TYPE_ATTACHMENT; break;
4382 case 'V': type = AVMEDIA_TYPE_VIDEO; nopic = 1; break;
4383 default: av_assert0(0);
4385 if (type != st->codec->codec_type)
4387 if (nopic && (st->disposition & AV_DISPOSITION_ATTACHED_PIC))
4389 if (*spec++ == ':') { /* possibly followed by :index */
4390 int i, index = strtol(spec, NULL, 0);
4391 for (i = 0; i < s->nb_streams; i++)
4392 if (s->streams[i]->codec->codec_type == type &&
4393 !(nopic && (st->disposition & AV_DISPOSITION_ATTACHED_PIC)) &&
4395 return i == st->index;
4399 } else if (*spec == 'p' && *(spec + 1) == ':') {
4403 prog_id = strtol(spec, &endptr, 0);
4404 for (i = 0; i < s->nb_programs; i++) {
4405 if (s->programs[i]->id != prog_id)
4408 if (*endptr++ == ':') {
4409 int stream_idx = strtol(endptr, NULL, 0);
4410 return stream_idx >= 0 &&
4411 stream_idx < s->programs[i]->nb_stream_indexes &&
4412 st->index == s->programs[i]->stream_index[stream_idx];
4415 for (j = 0; j < s->programs[i]->nb_stream_indexes; j++)
4416 if (st->index == s->programs[i]->stream_index[j])
4420 } else if (*spec == '#' ||
4421 (*spec == 'i' && *(spec + 1) == ':')) {
4424 spec += 1 + (*spec == 'i');
4425 stream_id = strtol(spec, &endptr, 0);
4427 return stream_id == st->id;
4428 } else if (*spec == 'm' && *(spec + 1) == ':') {
4429 AVDictionaryEntry *tag;
4434 val = strchr(spec, ':');
4436 key = val ? av_strndup(spec, val - spec) : av_strdup(spec);
4438 return AVERROR(ENOMEM);
4440 tag = av_dict_get(st->metadata, key, NULL, 0);
4442 if (!val || !strcmp(tag->value, val + 1))
4451 } else if (*spec == 'u') {
4452 AVCodecContext *avctx = st->codec;
4454 switch (avctx->codec_type) {
4455 case AVMEDIA_TYPE_AUDIO:
4456 val = avctx->sample_rate && avctx->channels;
4457 if (avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
4460 case AVMEDIA_TYPE_VIDEO:
4461 val = avctx->width && avctx->height;
4462 if (avctx->pix_fmt == AV_PIX_FMT_NONE)
4465 case AVMEDIA_TYPE_UNKNOWN:
4472 return avctx->codec_id != AV_CODEC_ID_NONE && val != 0;
4473 } else if (!*spec) /* empty specifier, matches everything */
4476 av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec);
4477 return AVERROR(EINVAL);
4480 int ff_generate_avci_extradata(AVStream *st)
4482 static const uint8_t avci100_1080p_extradata[] = {
4484 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4485 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4486 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4487 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
4488 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
4489 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
4490 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
4491 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
4492 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
4494 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4497 static const uint8_t avci100_1080i_extradata[] = {
4499 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4500 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
4501 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
4502 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
4503 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
4504 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
4505 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
4506 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
4507 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
4508 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
4509 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x20,
4511 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
4514 static const uint8_t avci50_1080p_extradata[] = {
4516 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4517 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4518 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4519 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37,
4520 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde,
4521 0x6e, 0x6c, 0xd3, 0x3c, 0x05, 0xa0, 0x22, 0x7e,
4522 0x5f, 0xfc, 0x00, 0x0c, 0x00, 0x13, 0x8c, 0x04,
4523 0x04, 0x05, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00,
4524 0x00, 0x03, 0x00, 0x32, 0x84, 0x00, 0x00, 0x00,
4526 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4529 static const uint8_t avci50_1080i_extradata[] = {
4531 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
4532 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4533 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4534 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
4535 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
4536 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
4537 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
4538 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
4539 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01,
4540 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
4541 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
4543 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4546 static const uint8_t avci100_720p_extradata[] = {
4548 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
4549 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
4550 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
4551 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
4552 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
4553 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
4554 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
4555 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
4556 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
4557 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
4559 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
4562 static const uint8_t avci50_720p_extradata[] = {
4564 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x20,
4565 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
4566 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
4567 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37,
4568 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde,
4569 0x6e, 0x6c, 0xd3, 0x3c, 0x0f, 0x01, 0x6e, 0xff,
4570 0xc0, 0x00, 0xc0, 0x01, 0x38, 0xc0, 0x40, 0x40,
4571 0x50, 0x00, 0x00, 0x03, 0x00, 0x10, 0x00, 0x00,
4572 0x06, 0x48, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
4574 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
4578 const uint8_t *data = NULL;
4581 if (st->codec->width == 1920) {
4582 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4583 data = avci100_1080p_extradata;
4584 size = sizeof(avci100_1080p_extradata);
4586 data = avci100_1080i_extradata;
4587 size = sizeof(avci100_1080i_extradata);
4589 } else if (st->codec->width == 1440) {
4590 if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
4591 data = avci50_1080p_extradata;
4592 size = sizeof(avci50_1080p_extradata);
4594 data = avci50_1080i_extradata;
4595 size = sizeof(avci50_1080i_extradata);
4597 } else if (st->codec->width == 1280) {
4598 data = avci100_720p_extradata;
4599 size = sizeof(avci100_720p_extradata);
4600 } else if (st->codec->width == 960) {
4601 data = avci50_720p_extradata;
4602 size = sizeof(avci50_720p_extradata);
4608 av_freep(&st->codec->extradata);
4609 if (ff_alloc_extradata(st->codec, size))
4610 return AVERROR(ENOMEM);
4611 memcpy(st->codec->extradata, data, size);
4616 uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
4621 for (i = 0; i < st->nb_side_data; i++) {
4622 if (st->side_data[i].type == type) {
4624 *size = st->side_data[i].size;
4625 return st->side_data[i].data;
4631 uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
4634 AVPacketSideData *sd, *tmp;
4636 uint8_t *data = av_malloc(size);
4641 for (i = 0; i < st->nb_side_data; i++) {
4642 sd = &st->side_data[i];
4644 if (sd->type == type) {
4645 av_freep(&sd->data);
4652 tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
4658 st->side_data = tmp;
4661 sd = &st->side_data[st->nb_side_data - 1];
4668 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
4670 AVBitStreamFilterContext *bsfc = NULL;
4671 AVBitStreamFilterContext **dest = &st->internal->bsfc;
4672 while (*dest && (*dest)->next)
4673 dest = &(*dest)->next;
4675 if (!(bsfc = av_bitstream_filter_init(name))) {
4676 av_log(NULL, AV_LOG_ERROR, "Unknown bitstream filter '%s'\n", name);
4677 return AVERROR(EINVAL);
4679 if (args && !(bsfc->args = av_strdup(args))) {
4680 av_bitstream_filter_close(bsfc);
4681 return AVERROR(ENOMEM);
4683 av_log(st->codec, AV_LOG_VERBOSE,
4684 "Automatically inserted bitstream filter '%s'; args='%s'\n",
4685 name, args ? args : "");
4690 int av_apply_bitstream_filters(AVCodecContext *codec, AVPacket *pkt,
4691 AVBitStreamFilterContext *bsfc)
4695 AVPacket new_pkt = *pkt;
4696 int a = av_bitstream_filter_filter(bsfc, codec, NULL,
4697 &new_pkt.data, &new_pkt.size,
4698 pkt->data, pkt->size,
4699 pkt->flags & AV_PKT_FLAG_KEY);
4700 if(a == 0 && new_pkt.data != pkt->data) {
4701 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
4703 memcpy(t, new_pkt.data, new_pkt.size);
4704 memset(t + new_pkt.size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
4709 a = AVERROR(ENOMEM);
4713 new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
4714 av_buffer_default_free, NULL, 0);
4716 pkt->side_data = NULL;
4717 pkt->side_data_elems = 0;
4718 av_packet_unref(pkt);
4720 av_freep(&new_pkt.data);
4721 a = AVERROR(ENOMEM);
4725 av_log(codec, AV_LOG_ERROR,
4726 "Failed to open bitstream filter %s for stream %d with codec %s",
4727 bsfc->filter->name, pkt->stream_index,
4728 codec->codec ? codec->codec->name : "copy");
4739 void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
4742 s->io_close(s, *pb);
4746 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
4748 AVDictionaryEntry *entry;
4749 int64_t parsed_timestamp;
4751 if ((entry = av_dict_get(s->metadata, "creation_time", NULL, 0))) {
4752 if ((ret = av_parse_time(&parsed_timestamp, entry->value, 0)) >= 0) {
4753 *timestamp = return_seconds ? parsed_timestamp / 1000000 : parsed_timestamp;
4756 av_log(s, AV_LOG_WARNING, "Failed to parse creation_time %s\n", entry->value);