2 * muxing 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
23 #include "avio_internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
40 #include "audiointerleave.h"
49 * muxing functions for use within libavformat
52 /* fraction handling */
55 * f = val + (num / den) + 0.5.
57 * 'num' is normalized so that it is such as 0 <= num < den.
59 * @param f fractional number
60 * @param val integer value
61 * @param num must be >= 0
62 * @param den must be >= 1
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
77 * Fractional addition to f: f = f + (incr / f->den).
79 * @param f fractional number
80 * @param incr increment, can be positive or negative
82 static void frac_add(FFFrac *f, int64_t incr)
95 } else if (num >= den) {
102 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
109 for (j=2; j<14; j+= 1+(j>2))
110 while (q.den / q.num < min_precision && q.num % j == 0)
112 while (q.den / q.num < min_precision && q.den < (1<<24))
118 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
120 AVCodecParameters *par = st->codecpar;
121 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
123 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
124 return par->chroma_location;
127 if (pix_desc->log2_chroma_h == 0) {
128 return AVCHROMA_LOC_TOPLEFT;
129 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
130 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
131 switch (par->codec_id) {
132 case AV_CODEC_ID_MJPEG:
133 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
136 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
137 switch (par->codec_id) {
138 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
144 return AVCHROMA_LOC_UNSPECIFIED;
148 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
149 const char *format, const char *filename)
151 AVFormatContext *s = avformat_alloc_context();
160 oformat = av_guess_format(format, NULL, NULL);
162 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163 ret = AVERROR(EINVAL);
167 oformat = av_guess_format(NULL, filename, NULL);
169 ret = AVERROR(EINVAL);
170 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
177 s->oformat = oformat;
178 if (s->oformat->priv_data_size > 0) {
179 s->priv_data = av_mallocz(s->oformat->priv_data_size);
182 if (s->oformat->priv_class) {
183 *(const AVClass**)s->priv_data= s->oformat->priv_class;
184 av_opt_set_defaults(s->priv_data);
190 #if FF_API_FORMAT_FILENAME
191 FF_DISABLE_DEPRECATION_WARNINGS
192 av_strlcpy(s->filename, filename, sizeof(s->filename));
193 FF_ENABLE_DEPRECATION_WARNINGS
195 if (!(s->url = av_strdup(filename)))
202 av_log(s, AV_LOG_ERROR, "Out of memory\n");
203 ret = AVERROR(ENOMEM);
205 avformat_free_context(s);
209 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
211 const AVCodecTag *avctag;
213 enum AVCodecID id = AV_CODEC_ID_NONE;
217 * Check that tag + id is in the table
218 * If neither is in the table -> OK
219 * If tag is in the table with another id -> FAIL
220 * If id is in the table with another tag -> FAIL unless strict < normal
222 for (n = 0; s->oformat->codec_tag[n]; n++) {
223 avctag = s->oformat->codec_tag[n];
224 while (avctag->id != AV_CODEC_ID_NONE) {
225 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
227 if (id == st->codecpar->codec_id)
230 if (avctag->id == st->codecpar->codec_id)
235 if (id != AV_CODEC_ID_NONE)
237 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
243 static int init_muxer(AVFormatContext *s, AVDictionary **options)
247 AVDictionary *tmp = NULL;
248 AVCodecParameters *par = NULL;
249 AVOutputFormat *of = s->oformat;
250 const AVCodecDescriptor *desc;
251 AVDictionaryEntry *e;
254 av_dict_copy(&tmp, *options, 0);
256 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
258 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
259 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
262 #if FF_API_FORMAT_FILENAME
263 FF_DISABLE_DEPRECATION_WARNINGS
264 if (!s->url && !(s->url = av_strdup(s->filename))) {
265 FF_ENABLE_DEPRECATION_WARNINGS
267 if (!s->url && !(s->url = av_strdup(""))) {
269 ret = AVERROR(ENOMEM);
273 #if FF_API_LAVF_AVCTX
274 FF_DISABLE_DEPRECATION_WARNINGS
275 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
276 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
277 av_log(s, AV_LOG_WARNING,
278 "The AVFormatContext is not in set to bitexact mode, only "
279 "the AVCodecContext. If this is not intended, set "
280 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
283 FF_ENABLE_DEPRECATION_WARNINGS
286 // some sanity checks
287 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
288 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
289 ret = AVERROR(EINVAL);
293 for (i = 0; i < s->nb_streams; i++) {
297 #if FF_API_LAVF_AVCTX
298 FF_DISABLE_DEPRECATION_WARNINGS
299 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
300 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
301 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
302 "parameters to muxers is deprecated, use AVStream.codecpar "
304 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
308 FF_ENABLE_DEPRECATION_WARNINGS
311 if (!st->time_base.num) {
312 /* fall back on the default timebase values */
313 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
314 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
316 avpriv_set_pts_info(st, 33, 1, 90000);
319 switch (par->codec_type) {
320 case AVMEDIA_TYPE_AUDIO:
321 if (par->sample_rate <= 0) {
322 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
323 ret = AVERROR(EINVAL);
326 if (!par->block_align)
327 par->block_align = par->channels *
328 av_get_bits_per_sample(par->codec_id) >> 3;
330 case AVMEDIA_TYPE_VIDEO:
331 if ((par->width <= 0 || par->height <= 0) &&
332 !(of->flags & AVFMT_NODIMENSIONS)) {
333 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
334 ret = AVERROR(EINVAL);
337 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
338 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
340 if (st->sample_aspect_ratio.num != 0 &&
341 st->sample_aspect_ratio.den != 0 &&
342 par->sample_aspect_ratio.num != 0 &&
343 par->sample_aspect_ratio.den != 0) {
344 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
345 "(%d/%d) and encoder layer (%d/%d)\n",
346 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
347 par->sample_aspect_ratio.num,
348 par->sample_aspect_ratio.den);
349 ret = AVERROR(EINVAL);
356 desc = avcodec_descriptor_get(par->codec_id);
357 if (desc && desc->props & AV_CODEC_PROP_REORDER)
358 st->internal->reorder = 1;
362 && par->codec_id == AV_CODEC_ID_RAWVIDEO
363 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
364 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
365 && !validate_codec_tag(s, st)) {
366 // the current rawvideo encoding system ends up setting
367 // the wrong codec_tag for avi/mov, we override it here
370 if (par->codec_tag) {
371 if (!validate_codec_tag(s, st)) {
372 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
373 av_log(s, AV_LOG_ERROR,
374 "Tag %s incompatible with output codec id '%d' (%s)\n",
375 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
376 ret = AVERROR_INVALIDDATA;
380 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
383 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
384 s->internal->nb_interleaved_streams++;
387 if (!s->priv_data && of->priv_data_size > 0) {
388 s->priv_data = av_mallocz(of->priv_data_size);
390 ret = AVERROR(ENOMEM);
393 if (of->priv_class) {
394 *(const AVClass **)s->priv_data = of->priv_class;
395 av_opt_set_defaults(s->priv_data);
396 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
401 /* set muxer identification string */
402 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
403 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
405 av_dict_set(&s->metadata, "encoder", NULL, 0);
408 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
409 av_dict_set(&s->metadata, e->key, NULL, 0);
413 av_dict_free(options);
417 if (s->oformat->init) {
418 if ((ret = s->oformat->init(s)) < 0) {
419 if (s->oformat->deinit)
420 s->oformat->deinit(s);
433 static int init_pts(AVFormatContext *s)
438 /* init PTS generation */
439 for (i = 0; i < s->nb_streams; i++) {
440 int64_t den = AV_NOPTS_VALUE;
443 switch (st->codecpar->codec_type) {
444 case AVMEDIA_TYPE_AUDIO:
445 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
447 case AVMEDIA_TYPE_VIDEO:
448 den = (int64_t)st->time_base.num * st->time_base.den;
454 if (!st->internal->priv_pts)
455 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
456 if (!st->internal->priv_pts)
457 return AVERROR(ENOMEM);
459 if (den != AV_NOPTS_VALUE) {
461 return AVERROR_INVALIDDATA;
463 frac_init(st->internal->priv_pts, 0, 0, den);
467 if (s->avoid_negative_ts < 0) {
468 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
469 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
470 s->avoid_negative_ts = 0;
472 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
478 static void flush_if_needed(AVFormatContext *s)
480 if (s->pb && s->pb->error >= 0) {
481 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
483 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
484 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
488 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
492 if ((ret = init_muxer(s, options)) < 0)
495 s->internal->initialized = 1;
496 s->internal->streams_initialized = ret;
498 if (s->oformat->init && ret) {
499 if ((ret = init_pts(s)) < 0)
502 return AVSTREAM_INIT_IN_INIT_OUTPUT;
505 return AVSTREAM_INIT_IN_WRITE_HEADER;
508 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
511 int already_initialized = s->internal->initialized;
512 int streams_already_initialized = s->internal->streams_initialized;
514 if (!already_initialized)
515 if ((ret = avformat_init_output(s, options)) < 0)
518 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
519 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
520 if (s->oformat->write_header) {
521 ret = s->oformat->write_header(s);
522 if (ret >= 0 && s->pb && s->pb->error < 0)
528 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
529 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
531 if (!s->internal->streams_initialized) {
532 if ((ret = init_pts(s)) < 0)
536 return streams_already_initialized;
539 if (s->oformat->deinit)
540 s->oformat->deinit(s);
544 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
546 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
547 it is only being used internally to this file as a consistency check.
548 The value is chosen to be very unlikely to appear on its own and to cause
549 immediate failure if used anywhere as a real size. */
550 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
553 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
554 FF_DISABLE_DEPRECATION_WARNINGS
555 //FIXME merge with compute_pkt_fields
556 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
558 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
562 if (!s->internal->missing_ts_warning &&
563 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
564 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
565 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
566 av_log(s, AV_LOG_WARNING,
567 "Timestamps are unset in a packet for stream %d. "
568 "This is deprecated and will stop working in the future. "
569 "Fix your code to set the timestamps properly\n", st->index);
570 s->internal->missing_ts_warning = 1;
573 if (s->debug & FF_FDEBUG_TS)
574 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
575 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
577 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
578 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
579 pkt->duration, pkt->stream_index);
584 if (pkt->duration == 0) {
585 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
587 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
591 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
594 //XXX/FIXME this is a temporary hack until all encoders output pts
595 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
598 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
602 // pkt->pts= st->cur_dts;
603 pkt->pts = st->internal->priv_pts->val;
606 //calculate dts from pts
607 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
608 st->pts_buffer[0] = pkt->pts;
609 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
610 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
611 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
612 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
614 pkt->dts = st->pts_buffer[0];
617 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
618 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
619 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
620 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
621 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
622 av_log(s, AV_LOG_ERROR,
623 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
624 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
625 return AVERROR(EINVAL);
627 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
628 av_log(s, AV_LOG_ERROR,
629 "pts (%s) < dts (%s) in stream %d\n",
630 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
632 return AVERROR(EINVAL);
635 if (s->debug & FF_FDEBUG_TS)
636 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
637 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
639 st->cur_dts = pkt->dts;
640 st->internal->priv_pts->val = pkt->dts;
643 switch (st->codecpar->codec_type) {
644 case AVMEDIA_TYPE_AUDIO:
645 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
646 ((AVFrame *)pkt->data)->nb_samples :
647 av_get_audio_frame_duration(st->codec, pkt->size);
649 /* HACK/FIXME, we skip the initial 0 size packets as they are most
650 * likely equal to the encoder delay, but it would be better if we
651 * had the real timestamps from the encoder */
652 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
653 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
656 case AVMEDIA_TYPE_VIDEO:
657 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
662 FF_ENABLE_DEPRECATION_WARNINGS
666 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
669 * FIXME: this function should NEVER get undefined pts/dts beside when the
670 * AVFMT_NOTIMESTAMPS is set.
671 * Those additional safety checks should be dropped once the correct checks
672 * are set in the callers.
674 static int write_packet(AVFormatContext *s, AVPacket *pkt)
677 int64_t pts_backup, dts_backup;
679 pts_backup = pkt->pts;
680 dts_backup = pkt->dts;
682 // If the timestamp offsetting below is adjusted, adjust
683 // ff_interleaved_peek similarly.
684 if (s->output_ts_offset) {
685 AVStream *st = s->streams[pkt->stream_index];
686 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
688 if (pkt->dts != AV_NOPTS_VALUE)
690 if (pkt->pts != AV_NOPTS_VALUE)
694 if (s->avoid_negative_ts > 0) {
695 AVStream *st = s->streams[pkt->stream_index];
696 int64_t offset = st->mux_ts_offset;
697 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
699 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
700 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
701 s->internal->offset = -ts;
702 s->internal->offset_timebase = st->time_base;
705 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
706 offset = st->mux_ts_offset =
707 av_rescale_q_rnd(s->internal->offset,
708 s->internal->offset_timebase,
713 if (pkt->dts != AV_NOPTS_VALUE)
715 if (pkt->pts != AV_NOPTS_VALUE)
718 if (s->internal->avoid_negative_ts_use_pts) {
719 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
720 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
721 "pts %s in stream %d.\n"
722 "Try -avoid_negative_ts 1 as a possible workaround.\n",
728 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
729 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
730 av_log(s, AV_LOG_WARNING,
731 "Packets poorly interleaved, failed to avoid negative "
732 "timestamp %s in stream %d.\n"
733 "Try -max_interleave_delta 0 as a possible workaround.\n",
741 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
742 AVFrame *frame = (AVFrame *)pkt->data;
743 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
744 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
745 av_frame_free(&frame);
747 ret = s->oformat->write_packet(s, pkt);
750 if (s->pb && ret >= 0) {
752 if (s->pb->error < 0)
757 pkt->pts = pts_backup;
758 pkt->dts = dts_backup;
764 static int check_packet(AVFormatContext *s, AVPacket *pkt)
769 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
770 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
772 return AVERROR(EINVAL);
775 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
776 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
777 return AVERROR(EINVAL);
783 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
787 ret = check_packet(s, pkt);
791 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
792 /* sanitize the timestamps */
793 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
794 AVStream *st = s->streams[pkt->stream_index];
796 /* when there is no reordering (so dts is equal to pts), but
797 * only one of them is set, set the other as well */
798 if (!st->internal->reorder) {
799 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
801 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
805 /* check that the timestamps are set */
806 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
807 av_log(s, AV_LOG_ERROR,
808 "Timestamps are unset in a packet for stream %d\n", st->index);
809 return AVERROR(EINVAL);
812 /* check that the dts are increasing (or at least non-decreasing,
813 * if the format allows it */
814 if (st->cur_dts != AV_NOPTS_VALUE &&
815 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
816 st->cur_dts > pkt->dts)) {
817 av_log(s, AV_LOG_ERROR,
818 "Application provided invalid, non monotonically increasing "
819 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
820 st->index, st->cur_dts, pkt->dts);
821 return AVERROR(EINVAL);
824 if (pkt->pts < pkt->dts) {
825 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
826 pkt->pts, pkt->dts, st->index);
827 return AVERROR(EINVAL);
835 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
836 AVStream *st = s->streams[pkt->stream_index];
839 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
842 if (s->oformat->check_bitstream) {
843 if (!st->internal->bitstream_checked) {
844 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
847 st->internal->bitstream_checked = 1;
851 for (i = 0; i < st->internal->nb_bsfcs; i++) {
852 AVBSFContext *ctx = st->internal->bsfcs[i];
853 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
854 // flush each stream's BSF chain on write_trailer.
855 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
856 av_log(ctx, AV_LOG_ERROR,
857 "Failed to send packet to filter %s for stream %d\n",
858 ctx->filter->name, pkt->stream_index);
861 // TODO: when any automatically-added bitstream filter is generating multiple
862 // output packets for a single input one, we'll need to call this in a loop
863 // and write each output packet.
864 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
865 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
867 av_log(ctx, AV_LOG_ERROR,
868 "Failed to send packet to filter %s for stream %d\n",
869 ctx->filter->name, pkt->stream_index);
870 if (s->error_recognition & AV_EF_EXPLODE)
878 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
882 ret = prepare_input_packet(s, pkt);
887 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
888 ret = s->oformat->write_packet(s, NULL);
890 if (ret >= 0 && s->pb && s->pb->error < 0)
897 ret = do_packet_auto_bsf(s, pkt);
901 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
902 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
904 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
908 ret = write_packet(s, pkt);
909 if (ret >= 0 && s->pb && s->pb->error < 0)
913 s->streams[pkt->stream_index]->nb_frames++;
917 #define CHUNK_START 0x1000
919 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
920 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
923 AVPacketList **next_point, *this_pktl;
924 AVStream *st = s->streams[pkt->stream_index];
925 int chunked = s->max_chunk_size || s->max_chunk_duration;
927 this_pktl = av_mallocz(sizeof(AVPacketList));
929 return AVERROR(ENOMEM);
930 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
931 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
932 av_assert0(((AVFrame *)pkt->data)->buf);
933 this_pktl->pkt = *pkt;
935 pkt->side_data = NULL;
936 pkt->side_data_elems = 0;
938 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
944 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
945 next_point = &(st->last_in_packet_buffer->next);
947 next_point = &s->internal->packet_buffer;
951 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
952 st->interleaver_chunk_size += pkt->size;
953 st->interleaver_chunk_duration += pkt->duration;
954 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
955 || (max && st->interleaver_chunk_duration > max)) {
956 st->interleaver_chunk_size = 0;
957 this_pktl->pkt.flags |= CHUNK_START;
958 if (max && st->interleaver_chunk_duration > max) {
959 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
960 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
962 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
964 st->interleaver_chunk_duration = 0;
968 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
971 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
973 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
974 || !compare(s, &(*next_point)->pkt, pkt)))
975 next_point = &(*next_point)->next;
979 next_point = &(s->internal->packet_buffer_end->next);
982 av_assert1(!*next_point);
984 s->internal->packet_buffer_end = this_pktl;
987 this_pktl->next = *next_point;
989 s->streams[pkt->stream_index]->last_in_packet_buffer =
990 *next_point = this_pktl;
992 av_packet_unref(pkt);
997 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
1000 AVStream *st = s->streams[pkt->stream_index];
1001 AVStream *st2 = s->streams[next->stream_index];
1002 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1004 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1005 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1006 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1008 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
1009 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
1012 comp= (ts>ts2) - (ts<ts2);
1016 return pkt->stream_index < next->stream_index;
1020 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1021 AVPacket *pkt, int flush)
1024 int stream_count = 0;
1025 int noninterleaved_count = 0;
1030 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1034 for (i = 0; i < s->nb_streams; i++) {
1035 if (s->streams[i]->last_in_packet_buffer) {
1037 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1038 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1039 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1040 ++noninterleaved_count;
1044 if (s->internal->nb_interleaved_streams == stream_count)
1047 if (s->max_interleave_delta > 0 &&
1048 s->internal->packet_buffer &&
1050 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1052 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1053 int64_t delta_dts = INT64_MIN;
1054 int64_t top_dts = av_rescale_q(top_pkt->dts,
1055 s->streams[top_pkt->stream_index]->time_base,
1058 for (i = 0; i < s->nb_streams; i++) {
1060 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1065 last_dts = av_rescale_q(last->pkt.dts,
1066 s->streams[i]->time_base,
1068 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1071 if (delta_dts > s->max_interleave_delta) {
1072 av_log(s, AV_LOG_DEBUG,
1073 "Delay between the first packet and last packet in the "
1074 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1075 delta_dts, s->max_interleave_delta);
1080 if (s->internal->packet_buffer &&
1082 (s->flags & AVFMT_FLAG_SHORTEST) &&
1083 s->internal->shortest_end == AV_NOPTS_VALUE) {
1084 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1086 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1087 s->streams[top_pkt->stream_index]->time_base,
1091 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1092 while (s->internal->packet_buffer) {
1093 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1095 int64_t top_dts = av_rescale_q(top_pkt->dts,
1096 s->streams[top_pkt->stream_index]->time_base,
1099 if (s->internal->shortest_end + 1 >= top_dts)
1102 pktl = s->internal->packet_buffer;
1103 st = s->streams[pktl->pkt.stream_index];
1105 s->internal->packet_buffer = pktl->next;
1106 if (!s->internal->packet_buffer)
1107 s->internal->packet_buffer_end = NULL;
1109 if (st->last_in_packet_buffer == pktl)
1110 st->last_in_packet_buffer = NULL;
1112 av_packet_unref(&pktl->pkt);
1118 if (stream_count && flush) {
1120 pktl = s->internal->packet_buffer;
1122 st = s->streams[out->stream_index];
1124 s->internal->packet_buffer = pktl->next;
1125 if (!s->internal->packet_buffer)
1126 s->internal->packet_buffer_end = NULL;
1128 if (st->last_in_packet_buffer == pktl)
1129 st->last_in_packet_buffer = NULL;
1134 av_init_packet(out);
1139 int ff_interleaved_peek(AVFormatContext *s, int stream,
1140 AVPacket *pkt, int add_offset)
1142 AVPacketList *pktl = s->internal->packet_buffer;
1144 if (pktl->pkt.stream_index == stream) {
1147 AVStream *st = s->streams[pkt->stream_index];
1148 int64_t offset = st->mux_ts_offset;
1150 if (s->output_ts_offset)
1151 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1153 if (pkt->dts != AV_NOPTS_VALUE)
1155 if (pkt->pts != AV_NOPTS_VALUE)
1162 return AVERROR(ENOENT);
1166 * Interleave an AVPacket correctly so it can be muxed.
1167 * @param out the interleaved packet will be output here
1168 * @param in the input packet
1169 * @param flush 1 if no further packets are available as input and all
1170 * remaining packets should be output
1171 * @return 1 if a packet was output, 0 if no packet could be output,
1172 * < 0 if an error occurred
1174 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1176 if (s->oformat->interleave_packet) {
1177 int ret = s->oformat->interleave_packet(s, out, in, flush);
1179 av_packet_unref(in);
1182 return ff_interleave_packet_per_dts(s, out, in, flush);
1185 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1189 ret = prepare_input_packet(s, pkt);
1194 AVStream *st = s->streams[pkt->stream_index];
1196 ret = do_packet_auto_bsf(s, pkt);
1202 if (s->debug & FF_FDEBUG_TS)
1203 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1204 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1206 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1207 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1211 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1212 ret = AVERROR(EINVAL);
1216 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1222 int ret = interleave_packet(s, &opkt, pkt, flush);
1224 memset(pkt, 0, sizeof(*pkt));
1225 av_init_packet(pkt);
1228 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1231 ret = write_packet(s, &opkt);
1233 s->streams[opkt.stream_index]->nb_frames++;
1235 av_packet_unref(&opkt);
1239 if(s->pb && s->pb->error)
1240 return s->pb->error;
1243 av_packet_unref(pkt);
1247 int av_write_trailer(AVFormatContext *s)
1253 ret = interleave_packet(s, &pkt, NULL, 1);
1259 ret = write_packet(s, &pkt);
1261 s->streams[pkt.stream_index]->nb_frames++;
1263 av_packet_unref(&pkt);
1267 if(s->pb && s->pb->error)
1272 if (s->oformat->write_trailer) {
1273 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1274 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1276 ret = s->oformat->write_trailer(s);
1278 s->oformat->write_trailer(s);
1282 if (s->oformat->deinit)
1283 s->oformat->deinit(s);
1285 s->internal->initialized =
1286 s->internal->streams_initialized = 0;
1291 ret = s->pb ? s->pb->error : 0;
1292 for (i = 0; i < s->nb_streams; i++) {
1293 av_freep(&s->streams[i]->priv_data);
1294 av_freep(&s->streams[i]->index_entries);
1296 if (s->oformat->priv_class)
1297 av_opt_free(s->priv_data);
1298 av_freep(&s->priv_data);
1302 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1303 int64_t *dts, int64_t *wall)
1305 if (!s->oformat || !s->oformat->get_output_timestamp)
1306 return AVERROR(ENOSYS);
1307 s->oformat->get_output_timestamp(s, stream, dts, wall);
1311 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1312 AVFormatContext *src, int interleave)
1318 local_pkt.stream_index = dst_stream;
1319 if (pkt->pts != AV_NOPTS_VALUE)
1320 local_pkt.pts = av_rescale_q(pkt->pts,
1321 src->streams[pkt->stream_index]->time_base,
1322 dst->streams[dst_stream]->time_base);
1323 if (pkt->dts != AV_NOPTS_VALUE)
1324 local_pkt.dts = av_rescale_q(pkt->dts,
1325 src->streams[pkt->stream_index]->time_base,
1326 dst->streams[dst_stream]->time_base);
1328 local_pkt.duration = av_rescale_q(pkt->duration,
1329 src->streams[pkt->stream_index]->time_base,
1330 dst->streams[dst_stream]->time_base);
1332 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1333 else ret = av_write_frame(dst, &local_pkt);
1334 pkt->buf = local_pkt.buf;
1335 pkt->side_data = local_pkt.side_data;
1336 pkt->side_data_elems = local_pkt.side_data_elems;
1340 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1341 AVFrame *frame, int interleaved)
1343 AVPacket pkt, *pktp;
1345 av_assert0(s->oformat);
1346 if (!s->oformat->write_uncoded_frame)
1347 return AVERROR(ENOSYS);
1353 av_init_packet(&pkt);
1354 pkt.data = (void *)frame;
1355 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1357 pkt.dts = frame->pts;
1358 pkt.duration = frame->pkt_duration;
1359 pkt.stream_index = stream_index;
1360 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1363 return interleaved ? av_interleaved_write_frame(s, pktp) :
1364 av_write_frame(s, pktp);
1367 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1370 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1373 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1376 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1379 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1381 av_assert0(s->oformat);
1382 if (!s->oformat->write_uncoded_frame)
1383 return AVERROR(ENOSYS);
1384 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1385 AV_WRITE_UNCODED_FRAME_QUERY);