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
24 #include "libavcodec/internal.h"
25 #include "libavcodec/packet_internal.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/timestamp.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/mathematics.h"
37 * muxing functions for use within libavformat
40 /* fraction handling */
43 * f = val + (num / den) + 0.5.
45 * 'num' is normalized so that it is such as 0 <= num < den.
47 * @param f fractional number
48 * @param val integer value
49 * @param num must be >= 0
50 * @param den must be >= 1
52 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
65 * Fractional addition to f: f = f + (incr / f->den).
67 * @param f fractional number
68 * @param incr increment, can be positive or negative
70 static void frac_add(FFFrac *f, int64_t incr)
83 } else if (num >= den) {
90 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
97 for (j=2; j<14; j+= 1+(j>2))
98 while (q.den / q.num < min_precision && q.num % j == 0)
100 while (q.den / q.num < min_precision && q.den < (1<<24))
106 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
108 AVCodecParameters *par = st->codecpar;
109 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
111 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
112 return par->chroma_location;
115 if (pix_desc->log2_chroma_h == 0) {
116 return AVCHROMA_LOC_TOPLEFT;
117 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
118 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
119 switch (par->codec_id) {
120 case AV_CODEC_ID_MJPEG:
121 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
124 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
125 switch (par->codec_id) {
126 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
132 return AVCHROMA_LOC_UNSPECIFIED;
136 int avformat_alloc_output_context2(AVFormatContext **avctx, const AVOutputFormat *oformat,
137 const char *format, const char *filename)
139 AVFormatContext *s = avformat_alloc_context();
148 oformat = av_guess_format(format, NULL, NULL);
150 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
151 ret = AVERROR(EINVAL);
155 oformat = av_guess_format(NULL, filename, NULL);
157 ret = AVERROR(EINVAL);
158 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
165 s->oformat = oformat;
166 if (s->oformat->priv_data_size > 0) {
167 s->priv_data = av_mallocz(s->oformat->priv_data_size);
170 if (s->oformat->priv_class) {
171 *(const AVClass**)s->priv_data= s->oformat->priv_class;
172 av_opt_set_defaults(s->priv_data);
178 if (!(s->url = av_strdup(filename)))
185 av_log(s, AV_LOG_ERROR, "Out of memory\n");
186 ret = AVERROR(ENOMEM);
188 avformat_free_context(s);
192 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
194 const AVCodecTag *avctag;
196 enum AVCodecID id = AV_CODEC_ID_NONE;
200 * Check that tag + id is in the table
201 * If neither is in the table -> OK
202 * If tag is in the table with another id -> FAIL
203 * If id is in the table with another tag -> FAIL unless strict < normal
205 for (n = 0; s->oformat->codec_tag[n]; n++) {
206 avctag = s->oformat->codec_tag[n];
207 while (avctag->id != AV_CODEC_ID_NONE) {
208 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
210 if (id == st->codecpar->codec_id)
213 if (avctag->id == st->codecpar->codec_id)
218 if (id != AV_CODEC_ID_NONE)
220 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
226 static int init_muxer(AVFormatContext *s, AVDictionary **options)
230 AVDictionary *tmp = NULL;
231 AVCodecParameters *par = NULL;
232 const AVOutputFormat *of = s->oformat;
233 const AVCodecDescriptor *desc;
234 AVDictionaryEntry *e;
237 av_dict_copy(&tmp, *options, 0);
239 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
241 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
242 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
245 if (!s->url && !(s->url = av_strdup(""))) {
246 ret = AVERROR(ENOMEM);
250 // some sanity checks
251 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
252 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
253 ret = AVERROR(EINVAL);
257 for (i = 0; i < s->nb_streams; i++) {
261 if (!st->time_base.num) {
262 /* fall back on the default timebase values */
263 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
264 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
266 avpriv_set_pts_info(st, 33, 1, 90000);
269 switch (par->codec_type) {
270 case AVMEDIA_TYPE_AUDIO:
271 if (par->sample_rate <= 0) {
272 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
273 ret = AVERROR(EINVAL);
276 if (!par->block_align)
277 par->block_align = par->channels *
278 av_get_bits_per_sample(par->codec_id) >> 3;
280 case AVMEDIA_TYPE_VIDEO:
281 if ((par->width <= 0 || par->height <= 0) &&
282 !(of->flags & AVFMT_NODIMENSIONS)) {
283 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
284 ret = AVERROR(EINVAL);
287 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
288 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
290 if (st->sample_aspect_ratio.num != 0 &&
291 st->sample_aspect_ratio.den != 0 &&
292 par->sample_aspect_ratio.num != 0 &&
293 par->sample_aspect_ratio.den != 0) {
294 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
295 "(%d/%d) and encoder layer (%d/%d)\n",
296 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
297 par->sample_aspect_ratio.num,
298 par->sample_aspect_ratio.den);
299 ret = AVERROR(EINVAL);
306 desc = avcodec_descriptor_get(par->codec_id);
307 if (desc && desc->props & AV_CODEC_PROP_REORDER)
308 st->internal->reorder = 1;
310 st->internal->is_intra_only = ff_is_intra_only(par->codec_id);
314 && par->codec_id == AV_CODEC_ID_RAWVIDEO
315 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
316 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
317 && !validate_codec_tag(s, st)) {
318 // the current rawvideo encoding system ends up setting
319 // the wrong codec_tag for avi/mov, we override it here
322 if (par->codec_tag) {
323 if (!validate_codec_tag(s, st)) {
324 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
325 av_log(s, AV_LOG_ERROR,
326 "Tag %s incompatible with output codec id '%d' (%s)\n",
327 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
328 ret = AVERROR_INVALIDDATA;
332 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
335 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
336 s->internal->nb_interleaved_streams++;
339 if (!s->priv_data && of->priv_data_size > 0) {
340 s->priv_data = av_mallocz(of->priv_data_size);
342 ret = AVERROR(ENOMEM);
345 if (of->priv_class) {
346 *(const AVClass **)s->priv_data = of->priv_class;
347 av_opt_set_defaults(s->priv_data);
348 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
353 /* set muxer identification string */
354 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
355 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
357 av_dict_set(&s->metadata, "encoder", NULL, 0);
360 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
361 av_dict_set(&s->metadata, e->key, NULL, 0);
365 av_dict_free(options);
369 if (s->oformat->init) {
370 if ((ret = s->oformat->init(s)) < 0) {
371 if (s->oformat->deinit)
372 s->oformat->deinit(s);
385 static int init_pts(AVFormatContext *s)
390 /* init PTS generation */
391 for (i = 0; i < s->nb_streams; i++) {
392 int64_t den = AV_NOPTS_VALUE;
395 switch (st->codecpar->codec_type) {
396 case AVMEDIA_TYPE_AUDIO:
397 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
399 case AVMEDIA_TYPE_VIDEO:
400 den = (int64_t)st->time_base.num * st->time_base.den;
406 if (!st->internal->priv_pts)
407 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
408 if (!st->internal->priv_pts)
409 return AVERROR(ENOMEM);
411 if (den != AV_NOPTS_VALUE) {
413 return AVERROR_INVALIDDATA;
415 frac_init(st->internal->priv_pts, 0, 0, den);
419 if (s->avoid_negative_ts < 0) {
420 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
421 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
422 s->avoid_negative_ts = 0;
424 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
430 static void flush_if_needed(AVFormatContext *s)
432 if (s->pb && s->pb->error >= 0) {
433 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
435 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
436 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
440 static void deinit_muxer(AVFormatContext *s)
442 if (s->oformat && s->oformat->deinit && s->internal->initialized)
443 s->oformat->deinit(s);
444 s->internal->initialized =
445 s->internal->streams_initialized = 0;
448 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
452 if ((ret = init_muxer(s, options)) < 0)
455 s->internal->initialized = 1;
456 s->internal->streams_initialized = ret;
458 if (s->oformat->init && ret) {
459 if ((ret = init_pts(s)) < 0)
462 return AVSTREAM_INIT_IN_INIT_OUTPUT;
465 return AVSTREAM_INIT_IN_WRITE_HEADER;
468 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
471 int already_initialized = s->internal->initialized;
472 int streams_already_initialized = s->internal->streams_initialized;
474 if (!already_initialized)
475 if ((ret = avformat_init_output(s, options)) < 0)
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 ret = s->oformat->write_header(s);
482 if (ret >= 0 && s->pb && s->pb->error < 0)
488 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
489 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
491 if (!s->internal->streams_initialized) {
492 if ((ret = init_pts(s)) < 0)
496 return streams_already_initialized;
503 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
506 #if FF_API_COMPUTE_PKT_FIELDS2
507 FF_DISABLE_DEPRECATION_WARNINGS
508 //FIXME merge with compute_pkt_fields
509 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
511 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
515 if (!s->internal->missing_ts_warning &&
516 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
517 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
518 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
519 av_log(s, AV_LOG_WARNING,
520 "Timestamps are unset in a packet for stream %d. "
521 "This is deprecated and will stop working in the future. "
522 "Fix your code to set the timestamps properly\n", st->index);
523 s->internal->missing_ts_warning = 1;
526 if (s->debug & FF_FDEBUG_TS)
527 av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
528 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
530 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
533 //XXX/FIXME this is a temporary hack until all encoders output pts
534 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
537 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
541 // pkt->pts= st->cur_dts;
542 pkt->pts = st->internal->priv_pts->val;
545 //calculate dts from pts
546 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
547 st->internal->pts_buffer[0] = pkt->pts;
548 for (i = 1; i < delay + 1 && st->internal->pts_buffer[i] == AV_NOPTS_VALUE; i++)
549 st->internal->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
550 for (i = 0; i<delay && st->internal->pts_buffer[i] > st->internal->pts_buffer[i + 1]; i++)
551 FFSWAP(int64_t, st->internal->pts_buffer[i], st->internal->pts_buffer[i + 1]);
553 pkt->dts = st->internal->pts_buffer[0];
556 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
557 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
558 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
559 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
560 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
561 av_log(s, AV_LOG_ERROR,
562 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
563 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
564 return AVERROR(EINVAL);
566 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
567 av_log(s, AV_LOG_ERROR,
568 "pts (%s) < dts (%s) in stream %d\n",
569 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
571 return AVERROR(EINVAL);
574 if (s->debug & FF_FDEBUG_TS)
575 av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
576 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
578 st->cur_dts = pkt->dts;
579 st->internal->priv_pts->val = pkt->dts;
582 switch (st->codecpar->codec_type) {
583 case AVMEDIA_TYPE_AUDIO:
584 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
585 (*(AVFrame **)pkt->data)->nb_samples :
586 av_get_audio_frame_duration2(st->codecpar, pkt->size);
588 /* HACK/FIXME, we skip the initial 0 size packets as they are most
589 * likely equal to the encoder delay, but it would be better if we
590 * had the real timestamps from the encoder */
591 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
592 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
595 case AVMEDIA_TYPE_VIDEO:
596 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
601 FF_ENABLE_DEPRECATION_WARNINGS
604 static void guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
606 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
607 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
608 pkt->duration, pkt->stream_index);
615 switch (st->codecpar->codec_type) {
616 case AVMEDIA_TYPE_VIDEO:
617 if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
618 pkt->duration = av_rescale_q(1, av_inv_q(st->avg_frame_rate),
620 } else if (st->time_base.num * 1000LL > st->time_base.den)
623 case AVMEDIA_TYPE_AUDIO: {
624 int frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
625 if (frame_size && st->codecpar->sample_rate) {
626 pkt->duration = av_rescale_q(frame_size,
627 (AVRational){1, st->codecpar->sample_rate},
636 * Shift timestamps and call muxer; the original pts/dts are not kept.
638 * FIXME: this function should NEVER get undefined pts/dts beside when the
639 * AVFMT_NOTIMESTAMPS is set.
640 * Those additional safety checks should be dropped once the correct checks
641 * are set in the callers.
643 static int write_packet(AVFormatContext *s, AVPacket *pkt)
647 // If the timestamp offsetting below is adjusted, adjust
648 // ff_interleaved_peek similarly.
649 if (s->output_ts_offset) {
650 AVStream *st = s->streams[pkt->stream_index];
651 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
653 if (pkt->dts != AV_NOPTS_VALUE)
655 if (pkt->pts != AV_NOPTS_VALUE)
659 if (s->avoid_negative_ts > 0) {
660 AVStream *st = s->streams[pkt->stream_index];
661 int64_t offset = st->internal->mux_ts_offset;
662 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
664 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
665 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
666 s->internal->offset = -ts;
667 s->internal->offset_timebase = st->time_base;
670 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
671 offset = st->internal->mux_ts_offset =
672 av_rescale_q_rnd(s->internal->offset,
673 s->internal->offset_timebase,
678 if (pkt->dts != AV_NOPTS_VALUE)
680 if (pkt->pts != AV_NOPTS_VALUE)
683 if (s->internal->avoid_negative_ts_use_pts) {
684 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
685 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
686 "pts %s in stream %d.\n"
687 "Try -avoid_negative_ts 1 as a possible workaround.\n",
693 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
694 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
695 av_log(s, AV_LOG_WARNING,
696 "Packets poorly interleaved, failed to avoid negative "
697 "timestamp %s in stream %d.\n"
698 "Try -max_interleave_delta 0 as a possible workaround.\n",
706 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
707 AVFrame **frame = (AVFrame **)pkt->data;
708 av_assert0(pkt->size == sizeof(*frame));
709 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
711 ret = s->oformat->write_packet(s, pkt);
714 if (s->pb && ret >= 0) {
716 if (s->pb->error < 0)
721 s->streams[pkt->stream_index]->nb_frames++;
726 static int check_packet(AVFormatContext *s, AVPacket *pkt)
728 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
729 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
731 return AVERROR(EINVAL);
734 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
735 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
736 return AVERROR(EINVAL);
742 static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
744 #if !FF_API_COMPUTE_PKT_FIELDS2
745 /* sanitize the timestamps */
746 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
748 /* when there is no reordering (so dts is equal to pts), but
749 * only one of them is set, set the other as well */
750 if (!st->internal->reorder) {
751 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
753 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
757 /* check that the timestamps are set */
758 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
759 av_log(s, AV_LOG_ERROR,
760 "Timestamps are unset in a packet for stream %d\n", st->index);
761 return AVERROR(EINVAL);
764 /* check that the dts are increasing (or at least non-decreasing,
765 * if the format allows it */
766 if (st->cur_dts != AV_NOPTS_VALUE &&
767 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
768 st->cur_dts > pkt->dts)) {
769 av_log(s, AV_LOG_ERROR,
770 "Application provided invalid, non monotonically increasing "
771 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
772 st->index, st->cur_dts, pkt->dts);
773 return AVERROR(EINVAL);
776 if (pkt->pts < pkt->dts) {
777 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
778 pkt->pts, pkt->dts, st->index);
779 return AVERROR(EINVAL);
784 if (st->internal->is_intra_only)
785 pkt->flags |= AV_PKT_FLAG_KEY;
790 #define CHUNK_START 0x1000
792 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
793 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
796 PacketList **next_point, *this_pktl;
797 AVStream *st = s->streams[pkt->stream_index];
798 int chunked = s->max_chunk_size || s->max_chunk_duration;
800 this_pktl = av_malloc(sizeof(PacketList));
802 av_packet_unref(pkt);
803 return AVERROR(ENOMEM);
805 if ((ret = av_packet_make_refcounted(pkt)) < 0) {
807 av_packet_unref(pkt);
811 av_packet_move_ref(&this_pktl->pkt, pkt);
812 pkt = &this_pktl->pkt;
814 if (st->internal->last_in_packet_buffer) {
815 next_point = &(st->internal->last_in_packet_buffer->next);
817 next_point = &s->internal->packet_buffer;
821 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
822 st->internal->interleaver_chunk_size += pkt->size;
823 st->internal->interleaver_chunk_duration += pkt->duration;
824 if ( (s->max_chunk_size && st->internal->interleaver_chunk_size > s->max_chunk_size)
825 || (max && st->internal->interleaver_chunk_duration > max)) {
826 st->internal->interleaver_chunk_size = 0;
827 pkt->flags |= CHUNK_START;
828 if (max && st->internal->interleaver_chunk_duration > max) {
829 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
830 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
832 st->internal->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
834 st->internal->interleaver_chunk_duration = 0;
838 if (chunked && !(pkt->flags & CHUNK_START))
841 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
843 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
844 || !compare(s, &(*next_point)->pkt, pkt)))
845 next_point = &(*next_point)->next;
849 next_point = &(s->internal->packet_buffer_end->next);
852 av_assert1(!*next_point);
854 s->internal->packet_buffer_end = this_pktl;
857 this_pktl->next = *next_point;
859 st->internal->last_in_packet_buffer = *next_point = this_pktl;
864 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
867 AVStream *st = s->streams[pkt->stream_index];
868 AVStream *st2 = s->streams[next->stream_index];
869 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
871 if (s->audio_preload) {
872 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
873 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
874 if (preload != preload2) {
876 preload *= s->audio_preload;
877 preload2 *= s->audio_preload;
878 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
879 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
881 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
882 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
885 comp = (ts2 > ts) - (ts2 < ts);
890 return pkt->stream_index < next->stream_index;
894 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
895 AVPacket *pkt, int flush)
898 int stream_count = 0;
899 int noninterleaved_count = 0;
904 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
908 for (i = 0; i < s->nb_streams; i++) {
909 if (s->streams[i]->internal->last_in_packet_buffer) {
911 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
912 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
913 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
914 ++noninterleaved_count;
918 if (s->internal->nb_interleaved_streams == stream_count)
921 if (s->max_interleave_delta > 0 &&
922 s->internal->packet_buffer &&
924 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
926 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
927 int64_t delta_dts = INT64_MIN;
928 int64_t top_dts = av_rescale_q(top_pkt->dts,
929 s->streams[top_pkt->stream_index]->time_base,
932 for (i = 0; i < s->nb_streams; i++) {
934 const PacketList *last = s->streams[i]->internal->last_in_packet_buffer;
939 last_dts = av_rescale_q(last->pkt.dts,
940 s->streams[i]->time_base,
942 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
945 if (delta_dts > s->max_interleave_delta) {
946 av_log(s, AV_LOG_DEBUG,
947 "Delay between the first packet and last packet in the "
948 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
949 delta_dts, s->max_interleave_delta);
954 if (s->internal->packet_buffer &&
956 (s->flags & AVFMT_FLAG_SHORTEST) &&
957 s->internal->shortest_end == AV_NOPTS_VALUE) {
958 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
960 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
961 s->streams[top_pkt->stream_index]->time_base,
965 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
966 while (s->internal->packet_buffer) {
967 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
969 int64_t top_dts = av_rescale_q(top_pkt->dts,
970 s->streams[top_pkt->stream_index]->time_base,
973 if (s->internal->shortest_end + 1 >= top_dts)
976 pktl = s->internal->packet_buffer;
977 st = s->streams[pktl->pkt.stream_index];
979 s->internal->packet_buffer = pktl->next;
980 if (!s->internal->packet_buffer)
981 s->internal->packet_buffer_end = NULL;
983 if (st->internal->last_in_packet_buffer == pktl)
984 st->internal->last_in_packet_buffer = NULL;
986 av_packet_unref(&pktl->pkt);
992 if (stream_count && flush) {
994 pktl = s->internal->packet_buffer;
996 st = s->streams[out->stream_index];
998 s->internal->packet_buffer = pktl->next;
999 if (!s->internal->packet_buffer)
1000 s->internal->packet_buffer_end = NULL;
1002 if (st->internal->last_in_packet_buffer == pktl)
1003 st->internal->last_in_packet_buffer = NULL;
1012 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
1016 if (stream_index < 0 || stream_index >= s->nb_streams)
1017 return AVERROR(EINVAL);
1019 st = s->streams[stream_index];
1020 *offset = st->internal->mux_ts_offset;
1022 if (s->output_ts_offset)
1023 *offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1028 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
1030 PacketList *pktl = s->internal->packet_buffer;
1032 if (pktl->pkt.stream_index == stream) {
1041 * Interleave an AVPacket correctly so it can be muxed.
1042 * @param out the interleaved packet will be output here
1043 * @param in the input packet; will always be blank on return if not NULL
1044 * @param flush 1 if no further packets are available as input and all
1045 * remaining packets should be output
1046 * @return 1 if a packet was output, 0 if no packet could be output,
1047 * < 0 if an error occurred
1049 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1051 if (s->oformat->interleave_packet) {
1052 return s->oformat->interleave_packet(s, out, in, flush);
1054 return ff_interleave_packet_per_dts(s, out, in, flush);
1057 static int check_bitstream(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1061 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1064 if (s->oformat->check_bitstream) {
1065 if (!st->internal->bitstream_checked) {
1066 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
1069 st->internal->bitstream_checked = 1;
1076 static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt, int flush)
1080 int ret = interleave_packet(s, &opkt, pkt, flush);
1086 ret = write_packet(s, &opkt);
1088 av_packet_unref(&opkt);
1095 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1099 if (s->debug & FF_FDEBUG_TS)
1100 av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1101 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1103 guess_pkt_duration(s, st, pkt);
1105 #if FF_API_COMPUTE_PKT_FIELDS2
1106 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1111 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1112 return AVERROR(EINVAL);
1113 return interleaved_write_packet(s, pkt, 0);
1115 return write_packet(s, pkt);
1119 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1121 AVBSFContext *bsfc = st->internal->bsfc;
1124 if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1125 av_log(s, AV_LOG_ERROR,
1126 "Failed to send packet to filter %s for stream %d\n",
1127 bsfc->filter->name, st->index);
1132 ret = av_bsf_receive_packet(bsfc, pkt);
1134 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1136 av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1137 "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1138 if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1142 av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1143 ret = write_packet_common(s, st, pkt, interleaved);
1144 if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1145 av_packet_unref(pkt);
1151 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1154 int ret = check_packet(s, pkt);
1157 st = s->streams[pkt->stream_index];
1159 ret = prepare_input_packet(s, st, pkt);
1163 ret = check_bitstream(s, st, pkt);
1167 if (st->internal->bsfc) {
1168 return write_packets_from_bsfs(s, st, pkt, interleaved);
1170 return write_packet_common(s, st, pkt, interleaved);
1174 int av_write_frame(AVFormatContext *s, AVPacket *in)
1176 AVPacket *pkt = s->internal->pkt;
1180 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1181 ret = s->oformat->write_packet(s, NULL);
1183 if (ret >= 0 && s->pb && s->pb->error < 0)
1190 if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1193 /* We don't own in, so we have to make sure not to modify it.
1194 * The following avoids copying in's data unnecessarily.
1195 * Copying side data is unavoidable as a bitstream filter
1196 * may change it, e.g. free it on errors. */
1197 av_packet_unref(pkt);
1199 pkt->data = in->data;
1200 pkt->size = in->size;
1201 ret = av_packet_copy_props(pkt, in);
1205 pkt->buf = av_buffer_ref(in->buf);
1207 ret = AVERROR(ENOMEM);
1213 ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1216 // Uncoded frames using the noninterleaved codepath are also freed here
1217 av_packet_unref(pkt);
1221 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1226 ret = write_packets_common(s, pkt, 1/*interleaved*/);
1228 av_packet_unref(pkt);
1231 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1232 return interleaved_write_packet(s, NULL, 1/*flush*/);
1236 int av_write_trailer(AVFormatContext *s)
1238 int i, ret1, ret = 0;
1239 AVPacket *pkt = s->internal->pkt;
1241 av_packet_unref(pkt);
1242 for (i = 0; i < s->nb_streams; i++) {
1243 if (s->streams[i]->internal->bsfc) {
1244 ret1 = write_packets_from_bsfs(s, s->streams[i], pkt, 1/*interleaved*/);
1246 av_packet_unref(pkt);
1251 ret1 = interleaved_write_packet(s, NULL, 1);
1255 if (s->oformat->write_trailer) {
1256 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1257 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1259 ret = s->oformat->write_trailer(s);
1261 s->oformat->write_trailer(s);
1270 ret = s->pb ? s->pb->error : 0;
1271 for (i = 0; i < s->nb_streams; i++) {
1272 av_freep(&s->streams[i]->priv_data);
1273 av_freep(&s->streams[i]->internal->index_entries);
1275 if (s->oformat->priv_class)
1276 av_opt_free(s->priv_data);
1277 av_freep(&s->priv_data);
1281 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1282 int64_t *dts, int64_t *wall)
1284 if (!s->oformat || !s->oformat->get_output_timestamp)
1285 return AVERROR(ENOSYS);
1286 s->oformat->get_output_timestamp(s, stream, dts, wall);
1290 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1291 AVFormatContext *src, int interleave)
1297 local_pkt.stream_index = dst_stream;
1299 av_packet_rescale_ts(&local_pkt,
1300 src->streams[pkt->stream_index]->time_base,
1301 dst->streams[dst_stream]->time_base);
1303 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1304 else ret = av_write_frame(dst, &local_pkt);
1305 pkt->buf = local_pkt.buf;
1306 pkt->side_data = local_pkt.side_data;
1307 pkt->side_data_elems = local_pkt.side_data_elems;
1311 static void uncoded_frame_free(void *unused, uint8_t *data)
1313 av_frame_free((AVFrame **)data);
1317 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1318 AVFrame *frame, int interleaved)
1320 AVPacket *pkt = s->internal->pkt;
1322 av_assert0(s->oformat);
1323 if (!s->oformat->write_uncoded_frame) {
1324 av_frame_free(&frame);
1325 return AVERROR(ENOSYS);
1331 size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1332 AVFrame **framep = av_mallocz(bufsize);
1336 av_packet_unref(pkt);
1337 pkt->buf = av_buffer_create((void *)framep, bufsize,
1338 uncoded_frame_free, NULL, 0);
1342 av_frame_free(&frame);
1343 return AVERROR(ENOMEM);
1347 pkt->data = (void *)framep;
1348 pkt->size = sizeof(frame);
1350 pkt->dts = frame->pts;
1351 pkt->duration = frame->pkt_duration;
1352 pkt->stream_index = stream_index;
1353 pkt->flags |= AV_PKT_FLAG_UNCODED_FRAME;
1356 return interleaved ? av_interleaved_write_frame(s, pkt) :
1357 av_write_frame(s, pkt);
1360 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1363 return write_uncoded_frame_internal(s, stream_index, frame, 0);
1366 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1369 return write_uncoded_frame_internal(s, stream_index, frame, 1);
1372 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1374 av_assert0(s->oformat);
1375 if (!s->oformat->write_uncoded_frame)
1376 return AVERROR(ENOSYS);
1377 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1378 AV_WRITE_UNCODED_FRAME_QUERY);