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 av_strlcpy(s->filename, filename, sizeof(s->filename));
194 av_log(s, AV_LOG_ERROR, "Out of memory\n");
195 ret = AVERROR(ENOMEM);
197 avformat_free_context(s);
201 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
203 const AVCodecTag *avctag;
205 enum AVCodecID id = AV_CODEC_ID_NONE;
209 * Check that tag + id is in the table
210 * If neither is in the table -> OK
211 * If tag is in the table with another id -> FAIL
212 * If id is in the table with another tag -> FAIL unless strict < normal
214 for (n = 0; s->oformat->codec_tag[n]; n++) {
215 avctag = s->oformat->codec_tag[n];
216 while (avctag->id != AV_CODEC_ID_NONE) {
217 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
219 if (id == st->codecpar->codec_id)
222 if (avctag->id == st->codecpar->codec_id)
227 if (id != AV_CODEC_ID_NONE)
229 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
235 static int init_muxer(AVFormatContext *s, AVDictionary **options)
239 AVDictionary *tmp = NULL;
240 AVCodecParameters *par = NULL;
241 AVOutputFormat *of = s->oformat;
242 const AVCodecDescriptor *desc;
243 AVDictionaryEntry *e;
246 av_dict_copy(&tmp, *options, 0);
248 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
250 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
251 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
254 #if FF_API_LAVF_AVCTX
255 FF_DISABLE_DEPRECATION_WARNINGS
256 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
257 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
258 #if FF_API_LAVF_BITEXACT
259 av_log(s, AV_LOG_WARNING,
260 "Setting the AVFormatContext to bitexact mode, because "
261 "the AVCodecContext is in that mode. This behavior will "
262 "change in the future. To keep the current behavior, set "
263 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
264 s->flags |= AVFMT_FLAG_BITEXACT;
266 av_log(s, AV_LOG_WARNING,
267 "The AVFormatContext is not in set to bitexact mode, only "
268 "the AVCodecContext. If this is not intended, set "
269 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
273 FF_ENABLE_DEPRECATION_WARNINGS
276 // some sanity checks
277 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
278 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
279 ret = AVERROR(EINVAL);
283 for (i = 0; i < s->nb_streams; i++) {
287 #if FF_API_LAVF_CODEC_TB && FF_API_LAVF_AVCTX
288 FF_DISABLE_DEPRECATION_WARNINGS
289 if (!st->time_base.num && st->codec->time_base.num) {
290 av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
291 "timebase hint to the muxer is deprecated. Set "
292 "AVStream.time_base instead.\n");
293 avpriv_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den);
295 FF_ENABLE_DEPRECATION_WARNINGS
298 #if FF_API_LAVF_AVCTX
299 FF_DISABLE_DEPRECATION_WARNINGS
300 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
301 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
302 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
303 "parameters to muxers is deprecated, use AVStream.codecpar "
305 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
309 FF_ENABLE_DEPRECATION_WARNINGS
312 /* update internal context from codecpar, old bsf api needs this
313 * FIXME: remove when autobsf uses new bsf API */
314 ret = avcodec_parameters_to_context(st->internal->avctx, st->codecpar);
318 if (!st->time_base.num) {
319 /* fall back on the default timebase values */
320 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
321 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
323 avpriv_set_pts_info(st, 33, 1, 90000);
326 switch (par->codec_type) {
327 case AVMEDIA_TYPE_AUDIO:
328 if (par->sample_rate <= 0) {
329 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
330 ret = AVERROR(EINVAL);
333 if (!par->block_align)
334 par->block_align = par->channels *
335 av_get_bits_per_sample(par->codec_id) >> 3;
337 case AVMEDIA_TYPE_VIDEO:
338 if ((par->width <= 0 || par->height <= 0) &&
339 !(of->flags & AVFMT_NODIMENSIONS)) {
340 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
341 ret = AVERROR(EINVAL);
344 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
345 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
347 if (st->sample_aspect_ratio.num != 0 &&
348 st->sample_aspect_ratio.den != 0 &&
349 par->sample_aspect_ratio.num != 0 &&
350 par->sample_aspect_ratio.den != 0) {
351 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
352 "(%d/%d) and encoder layer (%d/%d)\n",
353 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
354 par->sample_aspect_ratio.num,
355 par->sample_aspect_ratio.den);
356 ret = AVERROR(EINVAL);
363 desc = avcodec_descriptor_get(par->codec_id);
364 if (desc && desc->props & AV_CODEC_PROP_REORDER)
365 st->internal->reorder = 1;
369 && par->codec_id == AV_CODEC_ID_RAWVIDEO
370 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
371 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
372 && !validate_codec_tag(s, st)) {
373 // the current rawvideo encoding system ends up setting
374 // the wrong codec_tag for avi/mov, we override it here
377 if (par->codec_tag) {
378 if (!validate_codec_tag(s, st)) {
379 char tagbuf[32], tagbuf2[32];
380 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), par->codec_tag);
381 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, par->codec_id));
382 av_log(s, AV_LOG_ERROR,
383 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
384 tagbuf, par->codec_tag, par->codec_id, tagbuf2);
385 ret = AVERROR_INVALIDDATA;
389 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
392 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
393 s->internal->nb_interleaved_streams++;
396 if (!s->priv_data && of->priv_data_size > 0) {
397 s->priv_data = av_mallocz(of->priv_data_size);
399 ret = AVERROR(ENOMEM);
402 if (of->priv_class) {
403 *(const AVClass **)s->priv_data = of->priv_class;
404 av_opt_set_defaults(s->priv_data);
405 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
410 /* set muxer identification string */
411 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
412 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
414 av_dict_set(&s->metadata, "encoder", NULL, 0);
417 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
418 av_dict_set(&s->metadata, e->key, NULL, 0);
422 av_dict_free(options);
426 if (s->oformat->init && (ret = s->oformat->init(s)) < 0) {
427 if (s->oformat->deinit)
428 s->oformat->deinit(s);
439 static int init_pts(AVFormatContext *s)
444 /* init PTS generation */
445 for (i = 0; i < s->nb_streams; i++) {
446 int64_t den = AV_NOPTS_VALUE;
449 switch (st->codecpar->codec_type) {
450 case AVMEDIA_TYPE_AUDIO:
451 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
453 case AVMEDIA_TYPE_VIDEO:
454 den = (int64_t)st->time_base.num * st->time_base.den;
461 st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
463 return AVERROR(ENOMEM);
465 if (den != AV_NOPTS_VALUE) {
467 return AVERROR_INVALIDDATA;
469 frac_init(st->priv_pts, 0, 0, den);
476 static int write_header_internal(AVFormatContext *s)
478 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
479 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
480 if (s->oformat->write_header) {
481 int ret = s->oformat->write_header(s);
482 if (ret >= 0 && s->pb && s->pb->error < 0)
484 s->internal->write_header_ret = ret;
487 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
490 s->internal->header_written = 1;
491 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
492 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
496 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
500 if ((ret = init_muxer(s, options)) < 0)
503 if (!(s->oformat->check_bitstream && s->flags & AVFMT_FLAG_AUTO_BSF)) {
504 ret = write_header_internal(s);
509 if ((ret = init_pts(s)) < 0)
512 if (s->avoid_negative_ts < 0) {
513 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
514 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
515 s->avoid_negative_ts = 0;
517 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
523 if (s->oformat->deinit)
524 s->oformat->deinit(s);
528 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
530 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
531 it is only being used internally to this file as a consistency check.
532 The value is chosen to be very unlikely to appear on its own and to cause
533 immediate failure if used anywhere as a real size. */
534 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
537 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
538 FF_DISABLE_DEPRECATION_WARNINGS
539 //FIXME merge with compute_pkt_fields
540 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
542 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
546 if (!s->internal->missing_ts_warning &&
547 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
548 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
549 av_log(s, AV_LOG_WARNING,
550 "Timestamps are unset in a packet for stream %d. "
551 "This is deprecated and will stop working in the future. "
552 "Fix your code to set the timestamps properly\n", st->index);
553 s->internal->missing_ts_warning = 1;
556 if (s->debug & FF_FDEBUG_TS)
557 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
558 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
560 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
561 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
562 pkt->duration, pkt->stream_index);
567 if (pkt->duration == 0) {
568 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
570 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
574 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
577 //XXX/FIXME this is a temporary hack until all encoders output pts
578 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
581 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
585 // pkt->pts= st->cur_dts;
586 pkt->pts = st->priv_pts->val;
589 //calculate dts from pts
590 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
591 st->pts_buffer[0] = pkt->pts;
592 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
593 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
594 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
595 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
597 pkt->dts = st->pts_buffer[0];
600 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
601 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
602 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
603 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
604 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
605 av_log(s, AV_LOG_ERROR,
606 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
607 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
608 return AVERROR(EINVAL);
610 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
611 av_log(s, AV_LOG_ERROR,
612 "pts (%s) < dts (%s) in stream %d\n",
613 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
615 return AVERROR(EINVAL);
618 if (s->debug & FF_FDEBUG_TS)
619 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
620 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
622 st->cur_dts = pkt->dts;
623 st->priv_pts->val = pkt->dts;
626 switch (st->codecpar->codec_type) {
627 case AVMEDIA_TYPE_AUDIO:
628 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
629 ((AVFrame *)pkt->data)->nb_samples :
630 av_get_audio_frame_duration(st->codec, pkt->size);
632 /* HACK/FIXME, we skip the initial 0 size packets as they are most
633 * likely equal to the encoder delay, but it would be better if we
634 * had the real timestamps from the encoder */
635 if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
636 frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
639 case AVMEDIA_TYPE_VIDEO:
640 frac_add(st->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
645 FF_ENABLE_DEPRECATION_WARNINGS
649 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
652 * FIXME: this function should NEVER get undefined pts/dts beside when the
653 * AVFMT_NOTIMESTAMPS is set.
654 * Those additional safety checks should be dropped once the correct checks
655 * are set in the callers.
657 static int write_packet(AVFormatContext *s, AVPacket *pkt)
660 int64_t pts_backup, dts_backup;
662 pts_backup = pkt->pts;
663 dts_backup = pkt->dts;
665 if (s->output_ts_offset) {
666 AVStream *st = s->streams[pkt->stream_index];
667 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
669 if (pkt->dts != AV_NOPTS_VALUE)
671 if (pkt->pts != AV_NOPTS_VALUE)
675 if (s->avoid_negative_ts > 0) {
676 AVStream *st = s->streams[pkt->stream_index];
677 int64_t offset = st->mux_ts_offset;
678 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
680 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
681 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
682 s->internal->offset = -ts;
683 s->internal->offset_timebase = st->time_base;
686 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
687 offset = st->mux_ts_offset =
688 av_rescale_q_rnd(s->internal->offset,
689 s->internal->offset_timebase,
694 if (pkt->dts != AV_NOPTS_VALUE)
696 if (pkt->pts != AV_NOPTS_VALUE)
699 if (s->internal->avoid_negative_ts_use_pts) {
700 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
701 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
702 "pts %s in stream %d.\n"
703 "Try -avoid_negative_ts 1 as a possible workaround.\n",
709 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
710 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
711 av_log(s, AV_LOG_WARNING,
712 "Packets poorly interleaved, failed to avoid negative "
713 "timestamp %s in stream %d.\n"
714 "Try -max_interleave_delta 0 as a possible workaround.\n",
722 did_split = av_packet_split_side_data(pkt);
724 if (!s->internal->header_written) {
725 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
730 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
731 AVFrame *frame = (AVFrame *)pkt->data;
732 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
733 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
734 av_frame_free(&frame);
736 ret = s->oformat->write_packet(s, pkt);
739 if (s->pb && ret >= 0) {
740 if (s->flush_packets && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
742 if (s->pb->error < 0)
748 av_packet_merge_side_data(pkt);
751 pkt->pts = pts_backup;
752 pkt->dts = dts_backup;
758 static int check_packet(AVFormatContext *s, AVPacket *pkt)
763 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
764 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
766 return AVERROR(EINVAL);
769 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
770 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
771 return AVERROR(EINVAL);
777 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
781 ret = check_packet(s, pkt);
785 #if !FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
786 /* sanitize the timestamps */
787 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
788 AVStream *st = s->streams[pkt->stream_index];
790 /* when there is no reordering (so dts is equal to pts), but
791 * only one of them is set, set the other as well */
792 if (!st->internal->reorder) {
793 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
795 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
799 /* check that the timestamps are set */
800 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
801 av_log(s, AV_LOG_ERROR,
802 "Timestamps are unset in a packet for stream %d\n", st->index);
803 return AVERROR(EINVAL);
806 /* check that the dts are increasing (or at least non-decreasing,
807 * if the format allows it */
808 if (st->cur_dts != AV_NOPTS_VALUE &&
809 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
810 st->cur_dts > pkt->dts)) {
811 av_log(s, AV_LOG_ERROR,
812 "Application provided invalid, non monotonically increasing "
813 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
814 st->index, st->cur_dts, pkt->dts);
815 return AVERROR(EINVAL);
818 if (pkt->pts < pkt->dts) {
819 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
820 pkt->pts, pkt->dts, st->index);
821 return AVERROR(EINVAL);
829 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
830 AVStream *st = s->streams[pkt->stream_index];
833 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
836 if (s->oformat->check_bitstream) {
837 if (!st->internal->bitstream_checked) {
838 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
841 st->internal->bitstream_checked = 1;
845 for (i = 0; i < st->internal->nb_bsfcs; i++) {
846 AVBSFContext *ctx = st->internal->bsfcs[i];
848 AVBSFContext* prev_ctx = st->internal->bsfcs[i - 1];
849 if (prev_ctx->par_out->extradata_size != ctx->par_in->extradata_size) {
850 if ((ret = avcodec_parameters_copy(ctx->par_in, prev_ctx->par_out)) < 0)
854 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
855 // flush each stream's BSF chain on write_trailer.
856 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
857 av_log(ctx, AV_LOG_ERROR,
858 "Failed to send packet to filter %s for stream %d",
859 ctx->filter->name, pkt->stream_index);
862 // TODO: when any automatically-added bitstream filter is generating multiple
863 // output packets for a single input one, we'll need to call this in a loop
864 // and write each output packet.
865 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
866 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
868 av_log(ctx, AV_LOG_ERROR,
869 "Failed to send packet to filter %s for stream %d",
870 ctx->filter->name, pkt->stream_index);
873 if (i == st->internal->nb_bsfcs - 1) {
874 if (ctx->par_out->extradata_size != st->codecpar->extradata_size) {
875 if ((ret = avcodec_parameters_copy(st->codecpar, ctx->par_out)) < 0)
883 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
887 ret = prepare_input_packet(s, pkt);
892 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
893 if (!s->internal->header_written) {
894 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
898 ret = s->oformat->write_packet(s, NULL);
899 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
901 if (ret >= 0 && s->pb && s->pb->error < 0)
908 ret = do_packet_auto_bsf(s, pkt);
912 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
913 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
915 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
919 ret = write_packet(s, pkt);
920 if (ret >= 0 && s->pb && s->pb->error < 0)
924 s->streams[pkt->stream_index]->nb_frames++;
928 #define CHUNK_START 0x1000
930 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
931 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
934 AVPacketList **next_point, *this_pktl;
935 AVStream *st = s->streams[pkt->stream_index];
936 int chunked = s->max_chunk_size || s->max_chunk_duration;
938 this_pktl = av_mallocz(sizeof(AVPacketList));
940 return AVERROR(ENOMEM);
941 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
942 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
943 av_assert0(((AVFrame *)pkt->data)->buf);
944 this_pktl->pkt = *pkt;
946 pkt->side_data = NULL;
947 pkt->side_data_elems = 0;
949 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
955 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
956 next_point = &(st->last_in_packet_buffer->next);
958 next_point = &s->internal->packet_buffer;
962 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
963 st->interleaver_chunk_size += pkt->size;
964 st->interleaver_chunk_duration += pkt->duration;
965 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
966 || (max && st->interleaver_chunk_duration > max)) {
967 st->interleaver_chunk_size = 0;
968 this_pktl->pkt.flags |= CHUNK_START;
969 if (max && st->interleaver_chunk_duration > max) {
970 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
971 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
973 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
975 st->interleaver_chunk_duration = 0;
979 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
982 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
984 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
985 || !compare(s, &(*next_point)->pkt, pkt)))
986 next_point = &(*next_point)->next;
990 next_point = &(s->internal->packet_buffer_end->next);
993 av_assert1(!*next_point);
995 s->internal->packet_buffer_end = this_pktl;
998 this_pktl->next = *next_point;
1000 s->streams[pkt->stream_index]->last_in_packet_buffer =
1001 *next_point = this_pktl;
1003 av_packet_unref(pkt);
1008 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
1011 AVStream *st = s->streams[pkt->stream_index];
1012 AVStream *st2 = s->streams[next->stream_index];
1013 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1015 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1016 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);
1017 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);
1019 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
1020 -( 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;
1023 comp= (ts>ts2) - (ts<ts2);
1027 return pkt->stream_index < next->stream_index;
1031 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1032 AVPacket *pkt, int flush)
1035 int stream_count = 0;
1036 int noninterleaved_count = 0;
1041 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1045 for (i = 0; i < s->nb_streams; i++) {
1046 if (s->streams[i]->last_in_packet_buffer) {
1048 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1049 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1050 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1051 ++noninterleaved_count;
1055 if (s->internal->nb_interleaved_streams == stream_count)
1058 if (s->max_interleave_delta > 0 &&
1059 s->internal->packet_buffer &&
1061 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1063 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1064 int64_t delta_dts = INT64_MIN;
1065 int64_t top_dts = av_rescale_q(top_pkt->dts,
1066 s->streams[top_pkt->stream_index]->time_base,
1069 for (i = 0; i < s->nb_streams; i++) {
1071 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1076 last_dts = av_rescale_q(last->pkt.dts,
1077 s->streams[i]->time_base,
1079 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1082 if (delta_dts > s->max_interleave_delta) {
1083 av_log(s, AV_LOG_DEBUG,
1084 "Delay between the first packet and last packet in the "
1085 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1086 delta_dts, s->max_interleave_delta);
1091 if (s->internal->packet_buffer &&
1093 (s->flags & AVFMT_FLAG_SHORTEST) &&
1094 s->internal->shortest_end == AV_NOPTS_VALUE) {
1095 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1097 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1098 s->streams[top_pkt->stream_index]->time_base,
1102 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1103 while (s->internal->packet_buffer) {
1104 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1106 int64_t top_dts = av_rescale_q(top_pkt->dts,
1107 s->streams[top_pkt->stream_index]->time_base,
1110 if (s->internal->shortest_end + 1 >= top_dts)
1113 pktl = s->internal->packet_buffer;
1114 st = s->streams[pktl->pkt.stream_index];
1116 s->internal->packet_buffer = pktl->next;
1117 if (!s->internal->packet_buffer)
1118 s->internal->packet_buffer_end = NULL;
1120 if (st->last_in_packet_buffer == pktl)
1121 st->last_in_packet_buffer = NULL;
1123 av_packet_unref(&pktl->pkt);
1129 if (stream_count && flush) {
1131 pktl = s->internal->packet_buffer;
1133 st = s->streams[out->stream_index];
1135 s->internal->packet_buffer = pktl->next;
1136 if (!s->internal->packet_buffer)
1137 s->internal->packet_buffer_end = NULL;
1139 if (st->last_in_packet_buffer == pktl)
1140 st->last_in_packet_buffer = NULL;
1145 av_init_packet(out);
1150 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
1152 AVPacketList *pktl = s->internal->packet_buffer;
1154 if (pktl->pkt.stream_index == stream) {
1155 AVPacket *pkt = &pktl->pkt;
1156 AVStream *st = s->streams[pkt->stream_index];
1157 *ts_offset = st->mux_ts_offset;
1159 if (s->output_ts_offset)
1160 *ts_offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1170 * Interleave an AVPacket correctly so it can be muxed.
1171 * @param out the interleaved packet will be output here
1172 * @param in the input packet
1173 * @param flush 1 if no further packets are available as input and all
1174 * remaining packets should be output
1175 * @return 1 if a packet was output, 0 if no packet could be output,
1176 * < 0 if an error occurred
1178 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1180 if (s->oformat->interleave_packet) {
1181 int ret = s->oformat->interleave_packet(s, out, in, flush);
1183 av_packet_unref(in);
1186 return ff_interleave_packet_per_dts(s, out, in, flush);
1189 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1193 ret = prepare_input_packet(s, pkt);
1198 AVStream *st = s->streams[pkt->stream_index];
1200 ret = do_packet_auto_bsf(s, pkt);
1206 if (s->debug & FF_FDEBUG_TS)
1207 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1208 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1210 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1211 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1215 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1216 ret = AVERROR(EINVAL);
1220 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1226 int ret = interleave_packet(s, &opkt, pkt, flush);
1228 memset(pkt, 0, sizeof(*pkt));
1229 av_init_packet(pkt);
1232 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1235 ret = write_packet(s, &opkt);
1237 s->streams[opkt.stream_index]->nb_frames++;
1239 av_packet_unref(&opkt);
1243 if(s->pb && s->pb->error)
1244 return s->pb->error;
1247 av_packet_unref(pkt);
1251 int av_write_trailer(AVFormatContext *s)
1257 ret = interleave_packet(s, &pkt, NULL, 1);
1263 ret = write_packet(s, &pkt);
1265 s->streams[pkt.stream_index]->nb_frames++;
1267 av_packet_unref(&pkt);
1271 if(s->pb && s->pb->error)
1275 if (!s->internal->header_written) {
1276 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
1282 if (s->internal->header_written && s->oformat->write_trailer) {
1283 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1284 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1286 ret = s->oformat->write_trailer(s);
1288 s->oformat->write_trailer(s);
1292 if (s->oformat->deinit)
1293 s->oformat->deinit(s);
1298 ret = s->pb ? s->pb->error : 0;
1299 for (i = 0; i < s->nb_streams; i++) {
1300 av_freep(&s->streams[i]->priv_data);
1301 av_freep(&s->streams[i]->index_entries);
1303 if (s->oformat->priv_class)
1304 av_opt_free(s->priv_data);
1305 av_freep(&s->priv_data);
1309 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1310 int64_t *dts, int64_t *wall)
1312 if (!s->oformat || !s->oformat->get_output_timestamp)
1313 return AVERROR(ENOSYS);
1314 s->oformat->get_output_timestamp(s, stream, dts, wall);
1318 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1319 AVFormatContext *src, int interleave)
1325 local_pkt.stream_index = dst_stream;
1326 if (pkt->pts != AV_NOPTS_VALUE)
1327 local_pkt.pts = av_rescale_q(pkt->pts,
1328 src->streams[pkt->stream_index]->time_base,
1329 dst->streams[dst_stream]->time_base);
1330 if (pkt->dts != AV_NOPTS_VALUE)
1331 local_pkt.dts = av_rescale_q(pkt->dts,
1332 src->streams[pkt->stream_index]->time_base,
1333 dst->streams[dst_stream]->time_base);
1335 local_pkt.duration = av_rescale_q(pkt->duration,
1336 src->streams[pkt->stream_index]->time_base,
1337 dst->streams[dst_stream]->time_base);
1339 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1340 else ret = av_write_frame(dst, &local_pkt);
1341 pkt->buf = local_pkt.buf;
1342 pkt->side_data = local_pkt.side_data;
1343 pkt->side_data_elems = local_pkt.side_data_elems;
1347 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1348 AVFrame *frame, int interleaved)
1350 AVPacket pkt, *pktp;
1352 av_assert0(s->oformat);
1353 if (!s->oformat->write_uncoded_frame)
1354 return AVERROR(ENOSYS);
1360 av_init_packet(&pkt);
1361 pkt.data = (void *)frame;
1362 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1364 pkt.dts = frame->pts;
1365 pkt.duration = av_frame_get_pkt_duration(frame);
1366 pkt.stream_index = stream_index;
1367 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1370 return interleaved ? av_interleaved_write_frame(s, pktp) :
1371 av_write_frame(s, pktp);
1374 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1377 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1380 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1383 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1386 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1388 av_assert0(s->oformat);
1389 if (!s->oformat->write_uncoded_frame)
1390 return AVERROR(ENOSYS);
1391 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1392 AV_WRITE_UNCODED_FRAME_QUERY);