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 AVDictionaryEntry *e;
245 av_dict_copy(&tmp, *options, 0);
247 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
249 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
250 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
253 #if FF_API_LAVF_BITEXACT
254 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT)
255 s->flags |= AVFMT_FLAG_BITEXACT;
258 // some sanity checks
259 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
260 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
261 ret = AVERROR(EINVAL);
265 for (i = 0; i < s->nb_streams; i++) {
269 #if FF_API_LAVF_CODEC_TB
270 FF_DISABLE_DEPRECATION_WARNINGS
271 if (!st->time_base.num && codec->time_base.num) {
272 av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
273 "timebase hint to the muxer is deprecated. Set "
274 "AVStream.time_base instead.\n");
275 avpriv_set_pts_info(st, 64, codec->time_base.num, codec->time_base.den);
277 FF_ENABLE_DEPRECATION_WARNINGS
280 if (!st->time_base.num) {
281 /* fall back on the default timebase values */
282 if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->sample_rate)
283 avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
285 avpriv_set_pts_info(st, 33, 1, 90000);
288 switch (codec->codec_type) {
289 case AVMEDIA_TYPE_AUDIO:
290 if (codec->sample_rate <= 0) {
291 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
292 ret = AVERROR(EINVAL);
295 if (!codec->block_align)
296 codec->block_align = codec->channels *
297 av_get_bits_per_sample(codec->codec_id) >> 3;
299 case AVMEDIA_TYPE_VIDEO:
300 if ((codec->width <= 0 || codec->height <= 0) &&
301 !(of->flags & AVFMT_NODIMENSIONS)) {
302 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
303 ret = AVERROR(EINVAL);
306 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
307 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
309 if (st->sample_aspect_ratio.num != 0 &&
310 st->sample_aspect_ratio.den != 0 &&
311 codec->sample_aspect_ratio.num != 0 &&
312 codec->sample_aspect_ratio.den != 0) {
313 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
314 "(%d/%d) and encoder layer (%d/%d)\n",
315 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
316 codec->sample_aspect_ratio.num,
317 codec->sample_aspect_ratio.den);
318 ret = AVERROR(EINVAL);
326 if ( codec->codec_tag
327 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
328 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
329 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
330 && !validate_codec_tag(s, st)) {
331 // the current rawvideo encoding system ends up setting
332 // the wrong codec_tag for avi/mov, we override it here
333 codec->codec_tag = 0;
335 if (codec->codec_tag) {
336 if (!validate_codec_tag(s, st)) {
337 char tagbuf[32], tagbuf2[32];
338 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
339 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
340 av_log(s, AV_LOG_ERROR,
341 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
342 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
343 ret = AVERROR_INVALIDDATA;
347 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
350 if (of->flags & AVFMT_GLOBALHEADER &&
351 !(codec->flags & AV_CODEC_FLAG_GLOBAL_HEADER))
352 av_log(s, AV_LOG_WARNING,
353 "Codec for stream %d does not use global headers "
354 "but container format requires global headers\n", i);
356 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
357 s->internal->nb_interleaved_streams++;
360 if (!s->priv_data && of->priv_data_size > 0) {
361 s->priv_data = av_mallocz(of->priv_data_size);
363 ret = AVERROR(ENOMEM);
366 if (of->priv_class) {
367 *(const AVClass **)s->priv_data = of->priv_class;
368 av_opt_set_defaults(s->priv_data);
369 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
374 /* set muxer identification string */
375 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
376 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
378 av_dict_set(&s->metadata, "encoder", NULL, 0);
381 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
382 av_dict_set(&s->metadata, e->key, NULL, 0);
386 av_dict_free(options);
397 static int init_pts(AVFormatContext *s)
402 /* init PTS generation */
403 for (i = 0; i < s->nb_streams; i++) {
404 int64_t den = AV_NOPTS_VALUE;
407 switch (st->codec->codec_type) {
408 case AVMEDIA_TYPE_AUDIO:
409 den = (int64_t)st->time_base.num * st->codec->sample_rate;
411 case AVMEDIA_TYPE_VIDEO:
412 den = (int64_t)st->time_base.num * st->codec->time_base.den;
419 st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
421 return AVERROR(ENOMEM);
423 if (den != AV_NOPTS_VALUE) {
425 return AVERROR_INVALIDDATA;
427 frac_init(st->priv_pts, 0, 0, den);
434 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
438 if ((ret = init_muxer(s, options)) < 0)
441 if (s->oformat->write_header) {
442 ret = s->oformat->write_header(s);
443 if (ret >= 0 && s->pb && s->pb->error < 0)
447 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
451 if ((ret = init_pts(s)) < 0)
454 if (s->avoid_negative_ts < 0) {
455 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
456 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
457 s->avoid_negative_ts = 0;
459 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
465 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
467 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
468 it is only being used internally to this file as a consistency check.
469 The value is chosen to be very unlikely to appear on its own and to cause
470 immediate failure if used anywhere as a real size. */
471 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
474 //FIXME merge with compute_pkt_fields
475 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
477 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
481 if (s->debug & FF_FDEBUG_TS)
482 av_log(s, AV_LOG_TRACE, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
483 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
485 if (pkt->duration < 0 && st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
486 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %d in stream %d\n",
487 pkt->duration, pkt->stream_index);
492 if (pkt->duration == 0) {
493 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
495 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
499 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
502 //XXX/FIXME this is a temporary hack until all encoders output pts
503 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
506 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
510 // pkt->pts= st->cur_dts;
511 pkt->pts = st->priv_pts->val;
514 //calculate dts from pts
515 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
516 st->pts_buffer[0] = pkt->pts;
517 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
518 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
519 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
520 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
522 pkt->dts = st->pts_buffer[0];
525 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
526 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
527 st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE &&
528 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
529 av_log(s, AV_LOG_ERROR,
530 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
531 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
532 return AVERROR(EINVAL);
534 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
535 av_log(s, AV_LOG_ERROR,
536 "pts (%s) < dts (%s) in stream %d\n",
537 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
539 return AVERROR(EINVAL);
542 if (s->debug & FF_FDEBUG_TS)
543 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
544 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
546 st->cur_dts = pkt->dts;
547 st->priv_pts->val = pkt->dts;
550 switch (st->codec->codec_type) {
551 case AVMEDIA_TYPE_AUDIO:
552 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
553 ((AVFrame *)pkt->data)->nb_samples :
554 av_get_audio_frame_duration(st->codec, pkt->size);
556 /* HACK/FIXME, we skip the initial 0 size packets as they are most
557 * likely equal to the encoder delay, but it would be better if we
558 * had the real timestamps from the encoder */
559 if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
560 frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
563 case AVMEDIA_TYPE_VIDEO:
564 frac_add(st->priv_pts, (int64_t)st->time_base.den * st->codec->time_base.num);
571 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
574 * FIXME: this function should NEVER get undefined pts/dts beside when the
575 * AVFMT_NOTIMESTAMPS is set.
576 * Those additional safety checks should be dropped once the correct checks
577 * are set in the callers.
579 static int write_packet(AVFormatContext *s, AVPacket *pkt)
583 if (s->output_ts_offset) {
584 AVStream *st = s->streams[pkt->stream_index];
585 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
587 if (pkt->dts != AV_NOPTS_VALUE)
589 if (pkt->pts != AV_NOPTS_VALUE)
593 if (s->avoid_negative_ts > 0) {
594 AVStream *st = s->streams[pkt->stream_index];
595 int64_t offset = st->mux_ts_offset;
596 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
598 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
599 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
600 s->internal->offset = -ts;
601 s->internal->offset_timebase = st->time_base;
604 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
605 offset = st->mux_ts_offset =
606 av_rescale_q_rnd(s->internal->offset,
607 s->internal->offset_timebase,
612 if (pkt->dts != AV_NOPTS_VALUE)
614 if (pkt->pts != AV_NOPTS_VALUE)
617 if (s->internal->avoid_negative_ts_use_pts) {
618 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
619 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
620 "pts %s in stream %d.\n"
621 "Try -avoid_negative_ts 1 as a possible workaround.\n",
627 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
628 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
629 av_log(s, AV_LOG_WARNING,
630 "Packets poorly interleaved, failed to avoid negative "
631 "timestamp %s in stream %d.\n"
632 "Try -max_interleave_delta 0 as a possible workaround.\n",
640 did_split = av_packet_split_side_data(pkt);
641 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
642 AVFrame *frame = (AVFrame *)pkt->data;
643 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
644 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
645 av_frame_free(&frame);
647 ret = s->oformat->write_packet(s, pkt);
650 if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
654 av_packet_merge_side_data(pkt);
659 static int check_packet(AVFormatContext *s, AVPacket *pkt)
664 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
665 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
667 return AVERROR(EINVAL);
670 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
671 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
672 return AVERROR(EINVAL);
678 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
682 ret = check_packet(s, pkt);
687 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
688 ret = s->oformat->write_packet(s, NULL);
689 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
691 if (ret >= 0 && s->pb && s->pb->error < 0)
698 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
700 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
703 ret = write_packet(s, pkt);
704 if (ret >= 0 && s->pb && s->pb->error < 0)
708 s->streams[pkt->stream_index]->nb_frames++;
712 #define CHUNK_START 0x1000
714 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
715 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
718 AVPacketList **next_point, *this_pktl;
719 AVStream *st = s->streams[pkt->stream_index];
720 int chunked = s->max_chunk_size || s->max_chunk_duration;
722 this_pktl = av_mallocz(sizeof(AVPacketList));
724 return AVERROR(ENOMEM);
725 this_pktl->pkt = *pkt;
726 #if FF_API_DESTRUCT_PACKET
727 FF_DISABLE_DEPRECATION_WARNINGS
728 pkt->destruct = NULL; // do not free original but only the copy
729 FF_ENABLE_DEPRECATION_WARNINGS
732 pkt->side_data = NULL;
733 pkt->side_data_elems = 0;
734 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
735 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
736 av_assert0(((AVFrame *)pkt->data)->buf);
738 // Duplicate the packet if it uses non-allocated memory
739 if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
745 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
746 next_point = &(st->last_in_packet_buffer->next);
748 next_point = &s->internal->packet_buffer;
752 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
753 st->interleaver_chunk_size += pkt->size;
754 st->interleaver_chunk_duration += pkt->duration;
755 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
756 || (max && st->interleaver_chunk_duration > max)) {
757 st->interleaver_chunk_size = 0;
758 this_pktl->pkt.flags |= CHUNK_START;
759 if (max && st->interleaver_chunk_duration > max) {
760 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
761 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
763 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
765 st->interleaver_chunk_duration = 0;
769 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
772 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
774 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
775 || !compare(s, &(*next_point)->pkt, pkt)))
776 next_point = &(*next_point)->next;
780 next_point = &(s->internal->packet_buffer_end->next);
783 av_assert1(!*next_point);
785 s->internal->packet_buffer_end = this_pktl;
788 this_pktl->next = *next_point;
790 s->streams[pkt->stream_index]->last_in_packet_buffer =
791 *next_point = this_pktl;
796 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
799 AVStream *st = s->streams[pkt->stream_index];
800 AVStream *st2 = s->streams[next->stream_index];
801 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
803 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
804 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);
805 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);
807 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
808 -( 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;
811 comp= (ts>ts2) - (ts<ts2);
815 return pkt->stream_index < next->stream_index;
819 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
820 AVPacket *pkt, int flush)
823 int stream_count = 0;
824 int noninterleaved_count = 0;
828 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
832 for (i = 0; i < s->nb_streams; i++) {
833 if (s->streams[i]->last_in_packet_buffer) {
835 } else if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
836 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP8 &&
837 s->streams[i]->codec->codec_id != AV_CODEC_ID_VP9) {
838 ++noninterleaved_count;
842 if (s->internal->nb_interleaved_streams == stream_count)
845 if (s->max_interleave_delta > 0 &&
846 s->internal->packet_buffer &&
848 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
850 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
851 int64_t delta_dts = INT64_MIN;
852 int64_t top_dts = av_rescale_q(top_pkt->dts,
853 s->streams[top_pkt->stream_index]->time_base,
856 for (i = 0; i < s->nb_streams; i++) {
858 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
863 last_dts = av_rescale_q(last->pkt.dts,
864 s->streams[i]->time_base,
866 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
869 if (delta_dts > s->max_interleave_delta) {
870 av_log(s, AV_LOG_DEBUG,
871 "Delay between the first packet and last packet in the "
872 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
873 delta_dts, s->max_interleave_delta);
878 if (stream_count && flush) {
880 pktl = s->internal->packet_buffer;
882 st = s->streams[out->stream_index];
884 s->internal->packet_buffer = pktl->next;
885 if (!s->internal->packet_buffer)
886 s->internal->packet_buffer_end = NULL;
888 if (st->last_in_packet_buffer == pktl)
889 st->last_in_packet_buffer = NULL;
900 * Interleave an AVPacket correctly so it can be muxed.
901 * @param out the interleaved packet will be output here
902 * @param in the input packet
903 * @param flush 1 if no further packets are available as input and all
904 * remaining packets should be output
905 * @return 1 if a packet was output, 0 if no packet could be output,
906 * < 0 if an error occurred
908 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
910 if (s->oformat->interleave_packet) {
911 int ret = s->oformat->interleave_packet(s, out, in, flush);
916 return ff_interleave_packet_per_dts(s, out, in, flush);
919 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
923 ret = check_packet(s, pkt);
928 AVStream *st = s->streams[pkt->stream_index];
930 if (s->debug & FF_FDEBUG_TS)
931 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
932 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
934 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
937 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
938 ret = AVERROR(EINVAL);
942 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
948 int ret = interleave_packet(s, &opkt, pkt, flush);
950 memset(pkt, 0, sizeof(*pkt));
954 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
957 ret = write_packet(s, &opkt);
959 s->streams[opkt.stream_index]->nb_frames++;
961 av_free_packet(&opkt);
965 if(s->pb && s->pb->error)
969 av_packet_unref(pkt);
973 int av_write_trailer(AVFormatContext *s)
979 ret = interleave_packet(s, &pkt, NULL, 1);
985 ret = write_packet(s, &pkt);
987 s->streams[pkt.stream_index]->nb_frames++;
989 av_free_packet(&pkt);
993 if(s->pb && s->pb->error)
998 if (s->oformat->write_trailer)
1000 ret = s->oformat->write_trailer(s);
1002 s->oformat->write_trailer(s);
1008 ret = s->pb ? s->pb->error : 0;
1009 for (i = 0; i < s->nb_streams; i++) {
1010 av_freep(&s->streams[i]->priv_data);
1011 av_freep(&s->streams[i]->index_entries);
1013 if (s->oformat->priv_class)
1014 av_opt_free(s->priv_data);
1015 av_freep(&s->priv_data);
1019 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1020 int64_t *dts, int64_t *wall)
1022 if (!s->oformat || !s->oformat->get_output_timestamp)
1023 return AVERROR(ENOSYS);
1024 s->oformat->get_output_timestamp(s, stream, dts, wall);
1028 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1029 AVFormatContext *src, int interleave)
1035 local_pkt.stream_index = dst_stream;
1036 if (pkt->pts != AV_NOPTS_VALUE)
1037 local_pkt.pts = av_rescale_q(pkt->pts,
1038 src->streams[pkt->stream_index]->time_base,
1039 dst->streams[dst_stream]->time_base);
1040 if (pkt->dts != AV_NOPTS_VALUE)
1041 local_pkt.dts = av_rescale_q(pkt->dts,
1042 src->streams[pkt->stream_index]->time_base,
1043 dst->streams[dst_stream]->time_base);
1045 local_pkt.duration = av_rescale_q(pkt->duration,
1046 src->streams[pkt->stream_index]->time_base,
1047 dst->streams[dst_stream]->time_base);
1049 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1050 else ret = av_write_frame(dst, &local_pkt);
1051 pkt->buf = local_pkt.buf;
1052 pkt->side_data = local_pkt.side_data;
1053 pkt->side_data_elems = local_pkt.side_data_elems;
1054 #if FF_API_DESTRUCT_PACKET
1055 FF_DISABLE_DEPRECATION_WARNINGS
1056 pkt->destruct = local_pkt.destruct;
1057 FF_ENABLE_DEPRECATION_WARNINGS
1062 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1063 AVFrame *frame, int interleaved)
1065 AVPacket pkt, *pktp;
1067 av_assert0(s->oformat);
1068 if (!s->oformat->write_uncoded_frame)
1069 return AVERROR(ENOSYS);
1075 av_init_packet(&pkt);
1076 pkt.data = (void *)frame;
1077 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1079 pkt.dts = frame->pts;
1080 pkt.duration = av_frame_get_pkt_duration(frame);
1081 pkt.stream_index = stream_index;
1082 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1085 return interleaved ? av_interleaved_write_frame(s, pktp) :
1086 av_write_frame(s, pktp);
1089 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1092 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1095 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1098 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1101 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1103 av_assert0(s->oformat);
1104 if (!s->oformat->write_uncoded_frame)
1105 return AVERROR(ENOSYS);
1106 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1107 AV_WRITE_UNCODED_FRAME_QUERY);