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 AVCodecContext *avctx = st->codec;
121 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(avctx->pix_fmt);
123 if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
124 return avctx->chroma_sample_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 (avctx->field_order == AV_FIELD_UNKNOWN || avctx->field_order == AV_FIELD_PROGRESSIVE) {
131 switch (avctx->codec_id) {
132 case AV_CODEC_ID_MJPEG:
133 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
136 if (avctx->field_order == AV_FIELD_UNKNOWN || avctx->field_order != AV_FIELD_PROGRESSIVE) {
137 switch (avctx->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->codec->codec_tag)) {
219 if (id == st->codec->codec_id)
222 if (avctag->id == st->codec->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 AVCodecContext *codec = 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 (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
255 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
256 #if FF_API_LAVF_BITEXACT
257 av_log(s, AV_LOG_WARNING,
258 "Setting the AVFormatContext to bitexact mode, because "
259 "the AVCodecContext is in that mode. This behavior will "
260 "change in the future. To keep the current behavior, set "
261 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
262 s->flags |= AVFMT_FLAG_BITEXACT;
264 av_log(s, AV_LOG_WARNING,
265 "The AVFormatContext is not in set to bitexact mode, only "
266 "the AVCodecContext. If this is not intended, set "
267 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
272 // some sanity checks
273 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
274 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
275 ret = AVERROR(EINVAL);
279 for (i = 0; i < s->nb_streams; i++) {
283 #if FF_API_LAVF_CODEC_TB
284 FF_DISABLE_DEPRECATION_WARNINGS
285 if (!st->time_base.num && codec->time_base.num) {
286 av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
287 "timebase hint to the muxer is deprecated. Set "
288 "AVStream.time_base instead.\n");
289 avpriv_set_pts_info(st, 64, codec->time_base.num, codec->time_base.den);
291 FF_ENABLE_DEPRECATION_WARNINGS
294 if (!st->time_base.num) {
295 /* fall back on the default timebase values */
296 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->sample_rate)
297 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
299 avpriv_set_pts_info(st, 33, 1, 90000);
302 switch (codec->codec_type) {
303 case AVMEDIA_TYPE_AUDIO:
304 if (codec->sample_rate <= 0) {
305 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
306 ret = AVERROR(EINVAL);
309 if (!codec->block_align)
310 codec->block_align = codec->channels *
311 av_get_bits_per_sample(codec->codec_id) >> 3;
313 case AVMEDIA_TYPE_VIDEO:
314 if ((codec->width <= 0 || codec->height <= 0) &&
315 !(of->flags & AVFMT_NODIMENSIONS)) {
316 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
317 ret = AVERROR(EINVAL);
320 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
321 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
323 if (st->sample_aspect_ratio.num != 0 &&
324 st->sample_aspect_ratio.den != 0 &&
325 codec->sample_aspect_ratio.num != 0 &&
326 codec->sample_aspect_ratio.den != 0) {
327 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
328 "(%d/%d) and encoder layer (%d/%d)\n",
329 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
330 codec->sample_aspect_ratio.num,
331 codec->sample_aspect_ratio.den);
332 ret = AVERROR(EINVAL);
339 desc = avcodec_descriptor_get(codec->codec_id);
340 if (desc && desc->props & AV_CODEC_PROP_REORDER)
341 st->internal->reorder = 1;
344 if ( codec->codec_tag
345 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
346 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
347 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
348 && !validate_codec_tag(s, st)) {
349 // the current rawvideo encoding system ends up setting
350 // the wrong codec_tag for avi/mov, we override it here
351 codec->codec_tag = 0;
353 if (codec->codec_tag) {
354 if (!validate_codec_tag(s, st)) {
355 char tagbuf[32], tagbuf2[32];
356 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
357 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
358 av_log(s, AV_LOG_ERROR,
359 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
360 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
361 ret = AVERROR_INVALIDDATA;
365 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
368 if (of->flags & AVFMT_GLOBALHEADER &&
369 !(codec->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
370 av_log(s, AV_LOG_WARNING,
371 "Codec for stream %d does not use global headers "
372 "but container format requires global headers\n", i);
374 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
375 s->internal->nb_interleaved_streams++;
378 if (!s->priv_data && of->priv_data_size > 0) {
379 s->priv_data = av_mallocz(of->priv_data_size);
381 ret = AVERROR(ENOMEM);
384 if (of->priv_class) {
385 *(const AVClass **)s->priv_data = of->priv_class;
386 av_opt_set_defaults(s->priv_data);
387 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
392 /* set muxer identification string */
393 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
394 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
396 av_dict_set(&s->metadata, "encoder", NULL, 0);
399 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
400 av_dict_set(&s->metadata, e->key, NULL, 0);
404 av_dict_free(options);
408 if (s->oformat->init && (ret = s->oformat->init(s)) < 0) {
409 s->oformat->deinit(s);
420 static int init_pts(AVFormatContext *s)
425 /* init PTS generation */
426 for (i = 0; i < s->nb_streams; i++) {
427 int64_t den = AV_NOPTS_VALUE;
430 switch (st->codec->codec_type) {
431 case AVMEDIA_TYPE_AUDIO:
432 den = (int64_t)st->time_base.num * st->codec->sample_rate;
434 case AVMEDIA_TYPE_VIDEO:
435 den = (int64_t)st->time_base.num * st->codec->time_base.den;
442 st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
444 return AVERROR(ENOMEM);
446 if (den != AV_NOPTS_VALUE) {
448 return AVERROR_INVALIDDATA;
450 frac_init(st->priv_pts, 0, 0, den);
457 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
461 if ((ret = init_muxer(s, options)) < 0)
464 if (s->oformat->write_header && !s->oformat->check_bitstream) {
465 ret = s->oformat->write_header(s);
466 if (ret >= 0 && s->pb && s->pb->error < 0)
470 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
472 s->internal->header_written = 1;
475 if ((ret = init_pts(s)) < 0)
478 if (s->avoid_negative_ts < 0) {
479 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
480 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
481 s->avoid_negative_ts = 0;
483 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
489 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
491 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
492 it is only being used internally to this file as a consistency check.
493 The value is chosen to be very unlikely to appear on its own and to cause
494 immediate failure if used anywhere as a real size. */
495 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
498 #if FF_API_COMPUTE_PKT_FIELDS2
499 //FIXME merge with compute_pkt_fields
500 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
502 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
506 if (!s->internal->missing_ts_warning &&
507 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
508 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
509 av_log(s, AV_LOG_WARNING,
510 "Timestamps are unset in a packet for stream %d. "
511 "This is deprecated and will stop working in the future. "
512 "Fix your code to set the timestamps properly\n", st->index);
513 s->internal->missing_ts_warning = 1;
516 if (s->debug & FF_FDEBUG_TS)
517 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
518 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
520 if (pkt->duration < 0 && st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
521 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
522 pkt->duration, pkt->stream_index);
527 if (pkt->duration == 0) {
528 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
530 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
534 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
537 //XXX/FIXME this is a temporary hack until all encoders output pts
538 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
541 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
545 // pkt->pts= st->cur_dts;
546 pkt->pts = st->priv_pts->val;
549 //calculate dts from pts
550 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
551 st->pts_buffer[0] = pkt->pts;
552 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
553 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
554 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
555 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
557 pkt->dts = st->pts_buffer[0];
560 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
561 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
562 st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE &&
563 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
564 av_log(s, AV_LOG_ERROR,
565 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
566 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
567 return AVERROR(EINVAL);
569 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
570 av_log(s, AV_LOG_ERROR,
571 "pts (%s) < dts (%s) in stream %d\n",
572 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
574 return AVERROR(EINVAL);
577 if (s->debug & FF_FDEBUG_TS)
578 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
579 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
581 st->cur_dts = pkt->dts;
582 st->priv_pts->val = pkt->dts;
585 switch (st->codec->codec_type) {
586 case AVMEDIA_TYPE_AUDIO:
587 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
588 ((AVFrame *)pkt->data)->nb_samples :
589 av_get_audio_frame_duration(st->codec, pkt->size);
591 /* HACK/FIXME, we skip the initial 0 size packets as they are most
592 * likely equal to the encoder delay, but it would be better if we
593 * had the real timestamps from the encoder */
594 if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
595 frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
598 case AVMEDIA_TYPE_VIDEO:
599 frac_add(st->priv_pts, (int64_t)st->time_base.den * st->codec->time_base.num);
607 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
610 * FIXME: this function should NEVER get undefined pts/dts beside when the
611 * AVFMT_NOTIMESTAMPS is set.
612 * Those additional safety checks should be dropped once the correct checks
613 * are set in the callers.
615 static int write_packet(AVFormatContext *s, AVPacket *pkt)
619 if (s->output_ts_offset) {
620 AVStream *st = s->streams[pkt->stream_index];
621 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
623 if (pkt->dts != AV_NOPTS_VALUE)
625 if (pkt->pts != AV_NOPTS_VALUE)
629 if (s->avoid_negative_ts > 0) {
630 AVStream *st = s->streams[pkt->stream_index];
631 int64_t offset = st->mux_ts_offset;
632 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
634 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
635 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
636 s->internal->offset = -ts;
637 s->internal->offset_timebase = st->time_base;
640 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
641 offset = st->mux_ts_offset =
642 av_rescale_q_rnd(s->internal->offset,
643 s->internal->offset_timebase,
648 if (pkt->dts != AV_NOPTS_VALUE)
650 if (pkt->pts != AV_NOPTS_VALUE)
653 if (s->internal->avoid_negative_ts_use_pts) {
654 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
655 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
656 "pts %s in stream %d.\n"
657 "Try -avoid_negative_ts 1 as a possible workaround.\n",
663 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
664 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
665 av_log(s, AV_LOG_WARNING,
666 "Packets poorly interleaved, failed to avoid negative "
667 "timestamp %s in stream %d.\n"
668 "Try -max_interleave_delta 0 as a possible workaround.\n",
676 did_split = av_packet_split_side_data(pkt);
678 if (!s->internal->header_written && s->oformat->write_header) {
679 ret = s->oformat->write_header(s);
680 if (ret >= 0 && s->pb && s->pb->error < 0)
684 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
686 s->internal->header_written = 1;
689 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
690 AVFrame *frame = (AVFrame *)pkt->data;
691 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
692 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
693 av_frame_free(&frame);
695 ret = s->oformat->write_packet(s, pkt);
698 if (s->pb && ret >= 0) {
699 if (s->flush_packets && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
701 if (s->pb->error < 0)
707 av_packet_merge_side_data(pkt);
712 static int check_packet(AVFormatContext *s, AVPacket *pkt)
717 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
718 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
720 return AVERROR(EINVAL);
723 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
724 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
725 return AVERROR(EINVAL);
731 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
735 ret = check_packet(s, pkt);
739 #if !FF_API_COMPUTE_PKT_FIELDS2
740 /* sanitize the timestamps */
741 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
742 AVStream *st = s->streams[pkt->stream_index];
744 /* when there is no reordering (so dts is equal to pts), but
745 * only one of them is set, set the other as well */
746 if (!st->internal->reorder) {
747 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
749 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
753 /* check that the timestamps are set */
754 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
755 av_log(s, AV_LOG_ERROR,
756 "Timestamps are unset in a packet for stream %d\n", st->index);
757 return AVERROR(EINVAL);
760 /* check that the dts are increasing (or at least non-decreasing,
761 * if the format allows it */
762 if (st->cur_dts != AV_NOPTS_VALUE &&
763 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
764 st->cur_dts > pkt->dts)) {
765 av_log(s, AV_LOG_ERROR,
766 "Application provided invalid, non monotonically increasing "
767 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
768 st->index, st->cur_dts, pkt->dts);
769 return AVERROR(EINVAL);
772 if (pkt->pts < pkt->dts) {
773 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
774 pkt->pts, pkt->dts, st->index);
775 return AVERROR(EINVAL);
783 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
787 ret = prepare_input_packet(s, pkt);
792 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
793 ret = s->oformat->write_packet(s, NULL);
794 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
796 if (ret >= 0 && s->pb && s->pb->error < 0)
803 #if FF_API_COMPUTE_PKT_FIELDS2
804 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
806 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
810 ret = write_packet(s, pkt);
811 if (ret >= 0 && s->pb && s->pb->error < 0)
815 s->streams[pkt->stream_index]->nb_frames++;
819 #define CHUNK_START 0x1000
821 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
822 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
825 AVPacketList **next_point, *this_pktl;
826 AVStream *st = s->streams[pkt->stream_index];
827 int chunked = s->max_chunk_size || s->max_chunk_duration;
829 this_pktl = av_mallocz(sizeof(AVPacketList));
831 return AVERROR(ENOMEM);
832 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
833 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
834 av_assert0(((AVFrame *)pkt->data)->buf);
837 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
842 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
843 next_point = &(st->last_in_packet_buffer->next);
845 next_point = &s->internal->packet_buffer;
849 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
850 st->interleaver_chunk_size += pkt->size;
851 st->interleaver_chunk_duration += pkt->duration;
852 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
853 || (max && st->interleaver_chunk_duration > max)) {
854 st->interleaver_chunk_size = 0;
855 this_pktl->pkt.flags |= CHUNK_START;
856 if (max && st->interleaver_chunk_duration > max) {
857 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
858 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
860 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
862 st->interleaver_chunk_duration = 0;
866 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
869 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
871 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
872 || !compare(s, &(*next_point)->pkt, pkt)))
873 next_point = &(*next_point)->next;
877 next_point = &(s->internal->packet_buffer_end->next);
880 av_assert1(!*next_point);
882 s->internal->packet_buffer_end = this_pktl;
885 this_pktl->next = *next_point;
887 s->streams[pkt->stream_index]->last_in_packet_buffer =
888 *next_point = this_pktl;
890 av_packet_unref(pkt);
895 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
898 AVStream *st = s->streams[pkt->stream_index];
899 AVStream *st2 = s->streams[next->stream_index];
900 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
902 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
903 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
904 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
906 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
907 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
910 comp= (ts>ts2) - (ts<ts2);
914 return pkt->stream_index < next->stream_index;
918 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
919 AVPacket *pkt, int flush)
922 int stream_count = 0;
923 int noninterleaved_count = 0;
927 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
931 for (i = 0; i < s->nb_streams; i++) {
932 if (s->streams[i]->last_in_packet_buffer) {
934 } else if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
935 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP8 &&
936 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP9) {
937 ++noninterleaved_count;
941 if (s->internal->nb_interleaved_streams == stream_count)
944 if (s->max_interleave_delta > 0 &&
945 s->internal->packet_buffer &&
947 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
949 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
950 int64_t delta_dts = INT64_MIN;
951 int64_t top_dts = av_rescale_q(top_pkt->dts,
952 s->streams[top_pkt->stream_index]->time_base,
955 for (i = 0; i < s->nb_streams; i++) {
957 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
962 last_dts = av_rescale_q(last->pkt.dts,
963 s->streams[i]->time_base,
965 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
968 if (delta_dts > s->max_interleave_delta) {
969 av_log(s, AV_LOG_DEBUG,
970 "Delay between the first packet and last packet in the "
971 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
972 delta_dts, s->max_interleave_delta);
977 if (stream_count && flush) {
979 pktl = s->internal->packet_buffer;
981 st = s->streams[out->stream_index];
983 s->internal->packet_buffer = pktl->next;
984 if (!s->internal->packet_buffer)
985 s->internal->packet_buffer_end = NULL;
987 if (st->last_in_packet_buffer == pktl)
988 st->last_in_packet_buffer = NULL;
999 * Interleave an AVPacket correctly so it can be muxed.
1000 * @param out the interleaved packet will be output here
1001 * @param in the input packet
1002 * @param flush 1 if no further packets are available as input and all
1003 * remaining packets should be output
1004 * @return 1 if a packet was output, 0 if no packet could be output,
1005 * < 0 if an error occurred
1007 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1009 if (s->oformat->interleave_packet) {
1010 int ret = s->oformat->interleave_packet(s, out, in, flush);
1012 av_packet_unref(in);
1015 return ff_interleave_packet_per_dts(s, out, in, flush);
1018 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1022 ret = prepare_input_packet(s, pkt);
1027 AVStream *st = s->streams[pkt->stream_index];
1029 if (s->debug & FF_FDEBUG_TS)
1030 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1031 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1033 #if FF_API_COMPUTE_PKT_FIELDS2
1034 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1038 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1039 ret = AVERROR(EINVAL);
1043 if (s->oformat->check_bitstream) {
1044 if (!st->internal->bitstream_checked) {
1045 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
1048 st->internal->bitstream_checked = 1;
1052 av_apply_bitstream_filters(st->codec, pkt, st->internal->bsfc);
1054 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1060 int ret = interleave_packet(s, &opkt, pkt, flush);
1062 memset(pkt, 0, sizeof(*pkt));
1063 av_init_packet(pkt);
1066 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1069 ret = write_packet(s, &opkt);
1071 s->streams[opkt.stream_index]->nb_frames++;
1073 av_packet_unref(&opkt);
1077 if(s->pb && s->pb->error)
1078 return s->pb->error;
1081 av_packet_unref(pkt);
1085 int av_write_trailer(AVFormatContext *s)
1091 ret = interleave_packet(s, &pkt, NULL, 1);
1097 ret = write_packet(s, &pkt);
1099 s->streams[pkt.stream_index]->nb_frames++;
1101 av_packet_unref(&pkt);
1105 if(s->pb && s->pb->error)
1109 if (!s->internal->header_written && s->oformat->write_header) {
1110 ret = s->oformat->write_header(s);
1111 if (ret >= 0 && s->pb && s->pb->error < 0)
1115 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
1117 s->internal->header_written = 1;
1121 if ((s->internal->header_written || !s->oformat->write_header) && s->oformat->write_trailer)
1123 ret = s->oformat->write_trailer(s);
1125 s->oformat->write_trailer(s);
1128 if (s->oformat->deinit)
1129 s->oformat->deinit(s);
1134 ret = s->pb ? s->pb->error : 0;
1135 for (i = 0; i < s->nb_streams; i++) {
1136 av_freep(&s->streams[i]->priv_data);
1137 av_freep(&s->streams[i]->index_entries);
1139 if (s->oformat->priv_class)
1140 av_opt_free(s->priv_data);
1141 av_freep(&s->priv_data);
1145 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1146 int64_t *dts, int64_t *wall)
1148 if (!s->oformat || !s->oformat->get_output_timestamp)
1149 return AVERROR(ENOSYS);
1150 s->oformat->get_output_timestamp(s, stream, dts, wall);
1154 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1155 AVFormatContext *src, int interleave)
1161 local_pkt.stream_index = dst_stream;
1162 if (pkt->pts != AV_NOPTS_VALUE)
1163 local_pkt.pts = av_rescale_q(pkt->pts,
1164 src->streams[pkt->stream_index]->time_base,
1165 dst->streams[dst_stream]->time_base);
1166 if (pkt->dts != AV_NOPTS_VALUE)
1167 local_pkt.dts = av_rescale_q(pkt->dts,
1168 src->streams[pkt->stream_index]->time_base,
1169 dst->streams[dst_stream]->time_base);
1171 local_pkt.duration = av_rescale_q(pkt->duration,
1172 src->streams[pkt->stream_index]->time_base,
1173 dst->streams[dst_stream]->time_base);
1175 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1176 else ret = av_write_frame(dst, &local_pkt);
1177 pkt->buf = local_pkt.buf;
1178 pkt->side_data = local_pkt.side_data;
1179 pkt->side_data_elems = local_pkt.side_data_elems;
1183 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1184 AVFrame *frame, int interleaved)
1186 AVPacket pkt, *pktp;
1188 av_assert0(s->oformat);
1189 if (!s->oformat->write_uncoded_frame)
1190 return AVERROR(ENOSYS);
1196 av_init_packet(&pkt);
1197 pkt.data = (void *)frame;
1198 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1200 pkt.dts = frame->pts;
1201 pkt.duration = av_frame_get_pkt_duration(frame);
1202 pkt.stream_index = stream_index;
1203 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1206 return interleaved ? av_interleaved_write_frame(s, pktp) :
1207 av_write_frame(s, pktp);
1210 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1213 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1216 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1219 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1222 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1224 av_assert0(s->oformat);
1225 if (!s->oformat->write_uncoded_frame)
1226 return AVERROR(ENOSYS);
1227 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1228 AV_WRITE_UNCODED_FRAME_QUERY);