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) {
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)
661 if (s->output_ts_offset) {
662 AVStream *st = s->streams[pkt->stream_index];
663 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
665 if (pkt->dts != AV_NOPTS_VALUE)
667 if (pkt->pts != AV_NOPTS_VALUE)
671 if (s->avoid_negative_ts > 0) {
672 AVStream *st = s->streams[pkt->stream_index];
673 int64_t offset = st->mux_ts_offset;
674 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
676 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
677 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
678 s->internal->offset = -ts;
679 s->internal->offset_timebase = st->time_base;
682 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
683 offset = st->mux_ts_offset =
684 av_rescale_q_rnd(s->internal->offset,
685 s->internal->offset_timebase,
690 if (pkt->dts != AV_NOPTS_VALUE)
692 if (pkt->pts != AV_NOPTS_VALUE)
695 if (s->internal->avoid_negative_ts_use_pts) {
696 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
697 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
698 "pts %s in stream %d.\n"
699 "Try -avoid_negative_ts 1 as a possible workaround.\n",
705 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
706 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
707 av_log(s, AV_LOG_WARNING,
708 "Packets poorly interleaved, failed to avoid negative "
709 "timestamp %s in stream %d.\n"
710 "Try -max_interleave_delta 0 as a possible workaround.\n",
718 did_split = av_packet_split_side_data(pkt);
720 if (!s->internal->header_written) {
721 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
726 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
727 AVFrame *frame = (AVFrame *)pkt->data;
728 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
729 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
730 av_frame_free(&frame);
732 ret = s->oformat->write_packet(s, pkt);
735 if (s->pb && ret >= 0) {
736 if (s->flush_packets && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
738 if (s->pb->error < 0)
744 av_packet_merge_side_data(pkt);
749 static int check_packet(AVFormatContext *s, AVPacket *pkt)
754 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
755 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
757 return AVERROR(EINVAL);
760 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
761 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
762 return AVERROR(EINVAL);
768 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
772 ret = check_packet(s, pkt);
776 #if !FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
777 /* sanitize the timestamps */
778 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
779 AVStream *st = s->streams[pkt->stream_index];
781 /* when there is no reordering (so dts is equal to pts), but
782 * only one of them is set, set the other as well */
783 if (!st->internal->reorder) {
784 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
786 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
790 /* check that the timestamps are set */
791 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
792 av_log(s, AV_LOG_ERROR,
793 "Timestamps are unset in a packet for stream %d\n", st->index);
794 return AVERROR(EINVAL);
797 /* check that the dts are increasing (or at least non-decreasing,
798 * if the format allows it */
799 if (st->cur_dts != AV_NOPTS_VALUE &&
800 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
801 st->cur_dts > pkt->dts)) {
802 av_log(s, AV_LOG_ERROR,
803 "Application provided invalid, non monotonically increasing "
804 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
805 st->index, st->cur_dts, pkt->dts);
806 return AVERROR(EINVAL);
809 if (pkt->pts < pkt->dts) {
810 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
811 pkt->pts, pkt->dts, st->index);
812 return AVERROR(EINVAL);
820 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
821 AVStream *st = s->streams[pkt->stream_index];
824 if (s->oformat->check_bitstream) {
825 if (!st->internal->bitstream_checked) {
826 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
829 st->internal->bitstream_checked = 1;
833 for (i = 0; i < st->internal->nb_bsfcs; i++) {
834 AVBSFContext *ctx = st->internal->bsfcs[i];
836 AVBSFContext* prev_ctx = st->internal->bsfcs[i - 1];
837 if (prev_ctx->par_out->extradata_size != ctx->par_in->extradata_size) {
838 if ((ret = avcodec_parameters_copy(ctx->par_in, prev_ctx->par_out)) < 0)
842 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
843 // flush each stream's BSF chain on write_trailer.
844 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
845 av_log(ctx, AV_LOG_ERROR,
846 "Failed to send packet to filter %s for stream %d",
847 ctx->filter->name, pkt->stream_index);
850 // TODO: when any automatically-added bitstream filter is generating multiple
851 // output packets for a single input one, we'll need to call this in a loop
852 // and write each output packet.
853 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
854 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
856 av_log(ctx, AV_LOG_ERROR,
857 "Failed to send packet to filter %s for stream %d",
858 ctx->filter->name, pkt->stream_index);
861 if (i == st->internal->nb_bsfcs - 1) {
862 if (ctx->par_out->extradata_size != st->codecpar->extradata_size) {
863 if ((ret = avcodec_parameters_copy(st->codecpar, ctx->par_out)) < 0)
871 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
875 ret = prepare_input_packet(s, pkt);
880 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
881 if (!s->internal->header_written) {
882 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
886 ret = s->oformat->write_packet(s, NULL);
887 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
889 if (ret >= 0 && s->pb && s->pb->error < 0)
896 ret = do_packet_auto_bsf(s, pkt);
900 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
901 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
903 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
907 ret = write_packet(s, pkt);
908 if (ret >= 0 && s->pb && s->pb->error < 0)
912 s->streams[pkt->stream_index]->nb_frames++;
916 #define CHUNK_START 0x1000
918 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
919 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
922 AVPacketList **next_point, *this_pktl;
923 AVStream *st = s->streams[pkt->stream_index];
924 int chunked = s->max_chunk_size || s->max_chunk_duration;
926 this_pktl = av_mallocz(sizeof(AVPacketList));
928 return AVERROR(ENOMEM);
929 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
930 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
931 av_assert0(((AVFrame *)pkt->data)->buf);
932 this_pktl->pkt = *pkt;
934 pkt->side_data = NULL;
935 pkt->side_data_elems = 0;
937 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
943 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
944 next_point = &(st->last_in_packet_buffer->next);
946 next_point = &s->internal->packet_buffer;
950 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
951 st->interleaver_chunk_size += pkt->size;
952 st->interleaver_chunk_duration += pkt->duration;
953 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
954 || (max && st->interleaver_chunk_duration > max)) {
955 st->interleaver_chunk_size = 0;
956 this_pktl->pkt.flags |= CHUNK_START;
957 if (max && st->interleaver_chunk_duration > max) {
958 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
959 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
961 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
963 st->interleaver_chunk_duration = 0;
967 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
970 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
972 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
973 || !compare(s, &(*next_point)->pkt, pkt)))
974 next_point = &(*next_point)->next;
978 next_point = &(s->internal->packet_buffer_end->next);
981 av_assert1(!*next_point);
983 s->internal->packet_buffer_end = this_pktl;
986 this_pktl->next = *next_point;
988 s->streams[pkt->stream_index]->last_in_packet_buffer =
989 *next_point = this_pktl;
991 av_packet_unref(pkt);
996 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
999 AVStream *st = s->streams[pkt->stream_index];
1000 AVStream *st2 = s->streams[next->stream_index];
1001 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1003 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1004 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);
1005 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);
1007 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
1008 -( 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;
1011 comp= (ts>ts2) - (ts<ts2);
1015 return pkt->stream_index < next->stream_index;
1019 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1020 AVPacket *pkt, int flush)
1023 int stream_count = 0;
1024 int noninterleaved_count = 0;
1028 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1032 for (i = 0; i < s->nb_streams; i++) {
1033 if (s->streams[i]->last_in_packet_buffer) {
1035 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1036 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1037 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1038 ++noninterleaved_count;
1042 if (s->internal->nb_interleaved_streams == stream_count)
1045 if (s->max_interleave_delta > 0 &&
1046 s->internal->packet_buffer &&
1048 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1050 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1051 int64_t delta_dts = INT64_MIN;
1052 int64_t top_dts = av_rescale_q(top_pkt->dts,
1053 s->streams[top_pkt->stream_index]->time_base,
1056 for (i = 0; i < s->nb_streams; i++) {
1058 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1063 last_dts = av_rescale_q(last->pkt.dts,
1064 s->streams[i]->time_base,
1066 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1069 if (delta_dts > s->max_interleave_delta) {
1070 av_log(s, AV_LOG_DEBUG,
1071 "Delay between the first packet and last packet in the "
1072 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1073 delta_dts, s->max_interleave_delta);
1078 if (stream_count && flush) {
1080 pktl = s->internal->packet_buffer;
1082 st = s->streams[out->stream_index];
1084 s->internal->packet_buffer = pktl->next;
1085 if (!s->internal->packet_buffer)
1086 s->internal->packet_buffer_end = NULL;
1088 if (st->last_in_packet_buffer == pktl)
1089 st->last_in_packet_buffer = NULL;
1094 av_init_packet(out);
1099 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
1101 AVPacketList *pktl = s->internal->packet_buffer;
1103 if (pktl->pkt.stream_index == stream) {
1104 AVPacket *pkt = &pktl->pkt;
1105 AVStream *st = s->streams[pkt->stream_index];
1106 *ts_offset = st->mux_ts_offset;
1108 if (s->output_ts_offset)
1109 *ts_offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1119 * Interleave an AVPacket correctly so it can be muxed.
1120 * @param out the interleaved packet will be output here
1121 * @param in the input packet
1122 * @param flush 1 if no further packets are available as input and all
1123 * remaining packets should be output
1124 * @return 1 if a packet was output, 0 if no packet could be output,
1125 * < 0 if an error occurred
1127 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1129 if (s->oformat->interleave_packet) {
1130 int ret = s->oformat->interleave_packet(s, out, in, flush);
1132 av_packet_unref(in);
1135 return ff_interleave_packet_per_dts(s, out, in, flush);
1138 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1142 ret = prepare_input_packet(s, pkt);
1147 AVStream *st = s->streams[pkt->stream_index];
1149 ret = do_packet_auto_bsf(s, pkt);
1155 if (s->debug & FF_FDEBUG_TS)
1156 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1157 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1159 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1160 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1164 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1165 ret = AVERROR(EINVAL);
1169 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1175 int ret = interleave_packet(s, &opkt, pkt, flush);
1177 memset(pkt, 0, sizeof(*pkt));
1178 av_init_packet(pkt);
1181 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1184 ret = write_packet(s, &opkt);
1186 s->streams[opkt.stream_index]->nb_frames++;
1188 av_packet_unref(&opkt);
1192 if(s->pb && s->pb->error)
1193 return s->pb->error;
1196 av_packet_unref(pkt);
1200 int av_write_trailer(AVFormatContext *s)
1206 ret = interleave_packet(s, &pkt, NULL, 1);
1212 ret = write_packet(s, &pkt);
1214 s->streams[pkt.stream_index]->nb_frames++;
1216 av_packet_unref(&pkt);
1220 if(s->pb && s->pb->error)
1224 if (!s->internal->header_written) {
1225 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
1231 if (s->internal->header_written && s->oformat->write_trailer) {
1232 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1233 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1235 ret = s->oformat->write_trailer(s);
1237 s->oformat->write_trailer(s);
1241 if (s->oformat->deinit)
1242 s->oformat->deinit(s);
1247 ret = s->pb ? s->pb->error : 0;
1248 for (i = 0; i < s->nb_streams; i++) {
1249 av_freep(&s->streams[i]->priv_data);
1250 av_freep(&s->streams[i]->index_entries);
1252 if (s->oformat->priv_class)
1253 av_opt_free(s->priv_data);
1254 av_freep(&s->priv_data);
1258 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1259 int64_t *dts, int64_t *wall)
1261 if (!s->oformat || !s->oformat->get_output_timestamp)
1262 return AVERROR(ENOSYS);
1263 s->oformat->get_output_timestamp(s, stream, dts, wall);
1267 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1268 AVFormatContext *src, int interleave)
1274 local_pkt.stream_index = dst_stream;
1275 if (pkt->pts != AV_NOPTS_VALUE)
1276 local_pkt.pts = av_rescale_q(pkt->pts,
1277 src->streams[pkt->stream_index]->time_base,
1278 dst->streams[dst_stream]->time_base);
1279 if (pkt->dts != AV_NOPTS_VALUE)
1280 local_pkt.dts = av_rescale_q(pkt->dts,
1281 src->streams[pkt->stream_index]->time_base,
1282 dst->streams[dst_stream]->time_base);
1284 local_pkt.duration = av_rescale_q(pkt->duration,
1285 src->streams[pkt->stream_index]->time_base,
1286 dst->streams[dst_stream]->time_base);
1288 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1289 else ret = av_write_frame(dst, &local_pkt);
1290 pkt->buf = local_pkt.buf;
1291 pkt->side_data = local_pkt.side_data;
1292 pkt->side_data_elems = local_pkt.side_data_elems;
1296 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1297 AVFrame *frame, int interleaved)
1299 AVPacket pkt, *pktp;
1301 av_assert0(s->oformat);
1302 if (!s->oformat->write_uncoded_frame)
1303 return AVERROR(ENOSYS);
1309 av_init_packet(&pkt);
1310 pkt.data = (void *)frame;
1311 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1313 pkt.dts = frame->pts;
1314 pkt.duration = av_frame_get_pkt_duration(frame);
1315 pkt.stream_index = stream_index;
1316 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1319 return interleaved ? av_interleaved_write_frame(s, pktp) :
1320 av_write_frame(s, pktp);
1323 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1326 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1329 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1332 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1335 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1337 av_assert0(s->oformat);
1338 if (!s->oformat->write_uncoded_frame)
1339 return AVERROR(ENOSYS);
1340 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1341 AV_WRITE_UNCODED_FRAME_QUERY);