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"
52 * muxing functions for use within libavformat
55 /* fraction handling */
58 * f = val + (num / den) + 0.5.
60 * 'num' is normalized so that it is such as 0 <= num < den.
62 * @param f fractional number
63 * @param val integer value
64 * @param num must be >= 0
65 * @param den must be >= 1
67 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
80 * Fractional addition to f: f = f + (incr / f->den).
82 * @param f fractional number
83 * @param incr increment, can be positive or negative
85 static void frac_add(AVFrac *f, int64_t incr)
98 } else if (num >= den) {
105 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
110 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
111 q = (AVRational){1, st->codec->sample_rate};
113 q = st->codec->time_base;
115 for (j=2; j<14; j+= 1+(j>2))
116 while (q.den / q.num < min_precision && q.num % j == 0)
118 while (q.den / q.num < min_precision && q.den < (1<<24))
124 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
125 const char *format, const char *filename)
127 AVFormatContext *s = avformat_alloc_context();
136 oformat = av_guess_format(format, NULL, NULL);
138 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
139 ret = AVERROR(EINVAL);
143 oformat = av_guess_format(NULL, filename, NULL);
145 ret = AVERROR(EINVAL);
146 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
153 s->oformat = oformat;
154 if (s->oformat->priv_data_size > 0) {
155 s->priv_data = av_mallocz(s->oformat->priv_data_size);
158 if (s->oformat->priv_class) {
159 *(const AVClass**)s->priv_data= s->oformat->priv_class;
160 av_opt_set_defaults(s->priv_data);
166 av_strlcpy(s->filename, filename, sizeof(s->filename));
170 av_log(s, AV_LOG_ERROR, "Out of memory\n");
171 ret = AVERROR(ENOMEM);
173 avformat_free_context(s);
177 #if FF_API_ALLOC_OUTPUT_CONTEXT
178 AVFormatContext *avformat_alloc_output_context(const char *format,
179 AVOutputFormat *oformat, const char *filename)
181 AVFormatContext *avctx;
182 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
183 return ret < 0 ? NULL : avctx;
187 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
189 const AVCodecTag *avctag;
191 enum AVCodecID id = AV_CODEC_ID_NONE;
195 * Check that tag + id is in the table
196 * If neither is in the table -> OK
197 * If tag is in the table with another id -> FAIL
198 * If id is in the table with another tag -> FAIL unless strict < normal
200 for (n = 0; s->oformat->codec_tag[n]; n++) {
201 avctag = s->oformat->codec_tag[n];
202 while (avctag->id != AV_CODEC_ID_NONE) {
203 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
205 if (id == st->codec->codec_id)
208 if (avctag->id == st->codec->codec_id)
213 if (id != AV_CODEC_ID_NONE)
215 if (tag >= 0 && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
221 static int init_muxer(AVFormatContext *s, AVDictionary **options)
225 AVDictionary *tmp = NULL;
226 AVCodecContext *codec = NULL;
227 AVOutputFormat *of = s->oformat;
228 AVDictionaryEntry *e;
231 av_dict_copy(&tmp, *options, 0);
233 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
235 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
236 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
239 #if FF_API_LAVF_BITEXACT
240 if (s->nb_streams && s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)
241 s->flags |= AVFMT_FLAG_BITEXACT;
244 // some sanity checks
245 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
246 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
247 ret = AVERROR(EINVAL);
251 for (i = 0; i < s->nb_streams; i++) {
255 switch (codec->codec_type) {
256 case AVMEDIA_TYPE_AUDIO:
257 if (codec->sample_rate <= 0) {
258 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
259 ret = AVERROR(EINVAL);
262 if (!codec->block_align)
263 codec->block_align = codec->channels *
264 av_get_bits_per_sample(codec->codec_id) >> 3;
266 case AVMEDIA_TYPE_VIDEO:
267 if (codec->time_base.num <= 0 ||
268 codec->time_base.den <= 0) { //FIXME audio too?
269 av_log(s, AV_LOG_ERROR, "time base not set\n");
270 ret = AVERROR(EINVAL);
274 if ((codec->width <= 0 || codec->height <= 0) &&
275 !(of->flags & AVFMT_NODIMENSIONS)) {
276 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
277 ret = AVERROR(EINVAL);
280 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
281 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
283 if (st->sample_aspect_ratio.num != 0 &&
284 st->sample_aspect_ratio.den != 0 &&
285 codec->sample_aspect_ratio.den != 0 &&
286 codec->sample_aspect_ratio.den != 0) {
287 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
288 "(%d/%d) and encoder layer (%d/%d)\n",
289 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
290 codec->sample_aspect_ratio.num,
291 codec->sample_aspect_ratio.den);
292 ret = AVERROR(EINVAL);
300 if ( codec->codec_tag
301 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
302 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
303 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
304 && !validate_codec_tag(s, st)) {
305 // the current rawvideo encoding system ends up setting
306 // the wrong codec_tag for avi/mov, we override it here
307 codec->codec_tag = 0;
309 if (codec->codec_tag) {
310 if (!validate_codec_tag(s, st)) {
311 char tagbuf[32], tagbuf2[32];
312 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
313 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
314 av_log(s, AV_LOG_ERROR,
315 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
316 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
317 ret = AVERROR_INVALIDDATA;
321 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
324 if (of->flags & AVFMT_GLOBALHEADER &&
325 !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
326 av_log(s, AV_LOG_WARNING,
327 "Codec for stream %d does not use global headers "
328 "but container format requires global headers\n", i);
330 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
331 s->internal->nb_interleaved_streams++;
334 if (!s->priv_data && of->priv_data_size > 0) {
335 s->priv_data = av_mallocz(of->priv_data_size);
337 ret = AVERROR(ENOMEM);
340 if (of->priv_class) {
341 *(const AVClass **)s->priv_data = of->priv_class;
342 av_opt_set_defaults(s->priv_data);
343 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
348 /* set muxer identification string */
349 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
350 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
352 av_dict_set(&s->metadata, "encoder", NULL, 0);
355 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
356 av_dict_set(&s->metadata, e->key, NULL, 0);
360 av_dict_free(options);
371 static int init_pts(AVFormatContext *s)
376 /* init PTS generation */
377 for (i = 0; i < s->nb_streams; i++) {
378 int64_t den = AV_NOPTS_VALUE;
381 switch (st->codec->codec_type) {
382 case AVMEDIA_TYPE_AUDIO:
383 den = (int64_t)st->time_base.num * st->codec->sample_rate;
385 case AVMEDIA_TYPE_VIDEO:
386 den = (int64_t)st->time_base.num * st->codec->time_base.den;
391 if (den != AV_NOPTS_VALUE) {
393 return AVERROR_INVALIDDATA;
395 frac_init(&st->pts, 0, 0, den);
402 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
406 if (ret = init_muxer(s, options))
409 if (s->oformat->write_header) {
410 ret = s->oformat->write_header(s);
411 if (ret >= 0 && s->pb && s->pb->error < 0)
417 if ((ret = init_pts(s)) < 0)
420 if (s->avoid_negative_ts < 0) {
421 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
422 s->avoid_negative_ts = 0;
424 s->avoid_negative_ts = 1;
430 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
432 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
433 it is only being used internally to this file as a consistency check.
434 The value is chosen to be very unlikely to appear on its own and to cause
435 immediate failure if used anywhere as a real size. */
436 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
439 //FIXME merge with compute_pkt_fields
440 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
442 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
446 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
447 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
449 if (pkt->duration < 0 && st->codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
450 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %d in stream %d\n",
451 pkt->duration, pkt->stream_index);
456 if (pkt->duration == 0) {
457 ff_compute_frame_duration(&num, &den, st, NULL, pkt);
459 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
463 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
466 //XXX/FIXME this is a temporary hack until all encoders output pts
467 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
470 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
474 // pkt->pts= st->cur_dts;
475 pkt->pts = st->pts.val;
478 //calculate dts from pts
479 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
480 st->pts_buffer[0] = pkt->pts;
481 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
482 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
483 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
484 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
486 pkt->dts = st->pts_buffer[0];
489 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
490 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
491 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
492 av_log(s, AV_LOG_ERROR,
493 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
494 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
495 return AVERROR(EINVAL);
497 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
498 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
499 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
500 return AVERROR(EINVAL);
503 av_dlog(s, "av_write_frame: pts2:%s dts2:%s\n",
504 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
505 st->cur_dts = pkt->dts;
506 st->pts.val = pkt->dts;
509 switch (st->codec->codec_type) {
510 case AVMEDIA_TYPE_AUDIO:
511 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
512 ((AVFrame *)pkt->data)->nb_samples :
513 ff_get_audio_frame_size(st->codec, pkt->size, 1);
515 /* HACK/FIXME, we skip the initial 0 size packets as they are most
516 * likely equal to the encoder delay, but it would be better if we
517 * had the real timestamps from the encoder */
518 if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
519 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
522 case AVMEDIA_TYPE_VIDEO:
523 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
530 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
533 * FIXME: this function should NEVER get undefined pts/dts beside when the
534 * AVFMT_NOTIMESTAMPS is set.
535 * Those additional safety checks should be dropped once the correct checks
536 * are set in the callers.
538 static int write_packet(AVFormatContext *s, AVPacket *pkt)
542 if (s->output_ts_offset) {
543 AVStream *st = s->streams[pkt->stream_index];
544 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
546 if (pkt->dts != AV_NOPTS_VALUE)
548 if (pkt->pts != AV_NOPTS_VALUE)
552 if (s->avoid_negative_ts > 0) {
553 AVStream *st = s->streams[pkt->stream_index];
554 int64_t offset = st->mux_ts_offset;
556 if ((pkt->dts < 0 || s->avoid_negative_ts == 2) && pkt->dts != AV_NOPTS_VALUE && !s->offset) {
557 s->offset = -pkt->dts;
558 s->offset_timebase = st->time_base;
561 if (s->offset && !offset) {
562 offset = st->mux_ts_offset =
563 av_rescale_q_rnd(s->offset,
569 if (pkt->dts != AV_NOPTS_VALUE)
571 if (pkt->pts != AV_NOPTS_VALUE)
574 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0);
577 did_split = av_packet_split_side_data(pkt);
578 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
579 AVFrame *frame = (AVFrame *)pkt->data;
580 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
581 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
582 av_frame_free(&frame);
584 ret = s->oformat->write_packet(s, pkt);
587 if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
591 av_packet_merge_side_data(pkt);
596 static int check_packet(AVFormatContext *s, AVPacket *pkt)
601 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
602 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
604 return AVERROR(EINVAL);
607 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
608 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
609 return AVERROR(EINVAL);
615 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
619 ret = check_packet(s, pkt);
624 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
625 ret = s->oformat->write_packet(s, NULL);
626 if (s->flush_packets && s->pb && s->pb->error >= 0)
628 if (ret >= 0 && s->pb && s->pb->error < 0)
635 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
637 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
640 ret = write_packet(s, pkt);
641 if (ret >= 0 && s->pb && s->pb->error < 0)
645 s->streams[pkt->stream_index]->nb_frames++;
649 #define CHUNK_START 0x1000
651 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
652 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
654 AVPacketList **next_point, *this_pktl;
655 AVStream *st = s->streams[pkt->stream_index];
656 int chunked = s->max_chunk_size || s->max_chunk_duration;
659 this_pktl = av_mallocz(sizeof(AVPacketList));
661 return AVERROR(ENOMEM);
662 this_pktl->pkt = *pkt;
663 #if FF_API_DESTRUCT_PACKET
664 FF_DISABLE_DEPRECATION_WARNINGS
665 pkt->destruct = NULL; // do not free original but only the copy
666 FF_ENABLE_DEPRECATION_WARNINGS
669 pkt->side_data = NULL;
670 pkt->side_data_elems = 0;
671 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
672 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
673 av_assert0(((AVFrame *)pkt->data)->buf);
675 // duplicate the packet if it uses non-allocated memory
676 if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
682 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
683 next_point = &(st->last_in_packet_buffer->next);
685 next_point = &s->packet_buffer;
689 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
690 st->interleaver_chunk_size += pkt->size;
691 st->interleaver_chunk_duration += pkt->duration;
692 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
693 || (max && st->interleaver_chunk_duration > max)) {
694 st->interleaver_chunk_size = 0;
695 this_pktl->pkt.flags |= CHUNK_START;
696 if (max && st->interleaver_chunk_duration > max) {
697 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
698 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
700 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
702 st->interleaver_chunk_duration = 0;
706 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
709 if (compare(s, &s->packet_buffer_end->pkt, pkt)) {
711 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
712 || !compare(s, &(*next_point)->pkt, pkt)))
713 next_point = &(*next_point)->next;
717 next_point = &(s->packet_buffer_end->next);
720 av_assert1(!*next_point);
722 s->packet_buffer_end = this_pktl;
725 this_pktl->next = *next_point;
727 s->streams[pkt->stream_index]->last_in_packet_buffer =
728 *next_point = this_pktl;
732 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
735 AVStream *st = s->streams[pkt->stream_index];
736 AVStream *st2 = s->streams[next->stream_index];
737 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
739 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
740 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);
741 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);
743 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
744 -( 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;
747 comp= (ts>ts2) - (ts<ts2);
751 return pkt->stream_index < next->stream_index;
755 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
756 AVPacket *pkt, int flush)
759 int stream_count = 0, noninterleaved_count = 0;
763 ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts);
768 for (i = 0; i < s->nb_streams; i++) {
769 if (s->streams[i]->last_in_packet_buffer) {
771 } else if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
772 ++noninterleaved_count;
776 if (s->internal->nb_interleaved_streams == stream_count)
779 if (s->max_interleave_delta > 0 && s->packet_buffer && !flush) {
780 AVPacket *top_pkt = &s->packet_buffer->pkt;
781 int64_t delta_dts = INT64_MIN;
782 int64_t top_dts = av_rescale_q(top_pkt->dts,
783 s->streams[top_pkt->stream_index]->time_base,
786 for (i = 0; i < s->nb_streams; i++) {
788 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
793 last_dts = av_rescale_q(last->pkt.dts,
794 s->streams[i]->time_base,
796 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
799 if (delta_dts > s->max_interleave_delta) {
800 av_log(s, AV_LOG_DEBUG,
801 "Delay between the first packet and last packet in the "
802 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
803 delta_dts, s->max_interleave_delta);
808 if (stream_count && flush) {
810 pktl = s->packet_buffer;
812 st = s->streams[out->stream_index];
814 s->packet_buffer = pktl->next;
815 if (!s->packet_buffer)
816 s->packet_buffer_end = NULL;
818 if (st->last_in_packet_buffer == pktl)
819 st->last_in_packet_buffer = NULL;
830 * Interleave an AVPacket correctly so it can be muxed.
831 * @param out the interleaved packet will be output here
832 * @param in the input packet
833 * @param flush 1 if no further packets are available as input and all
834 * remaining packets should be output
835 * @return 1 if a packet was output, 0 if no packet could be output,
836 * < 0 if an error occurred
838 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
840 if (s->oformat->interleave_packet) {
841 int ret = s->oformat->interleave_packet(s, out, in, flush);
846 return ff_interleave_packet_per_dts(s, out, in, flush);
849 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
853 ret = check_packet(s, pkt);
858 AVStream *st = s->streams[pkt->stream_index];
860 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
861 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
862 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
865 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
866 ret = AVERROR(EINVAL);
870 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
876 int ret = interleave_packet(s, &opkt, pkt, flush);
878 memset(pkt, 0, sizeof(*pkt));
882 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
885 ret = write_packet(s, &opkt);
887 s->streams[opkt.stream_index]->nb_frames++;
889 av_free_packet(&opkt);
893 if(s->pb && s->pb->error)
897 av_packet_unref(pkt);
901 int av_write_trailer(AVFormatContext *s)
907 ret = interleave_packet(s, &pkt, NULL, 1);
908 if (ret < 0) //FIXME cleanup needed for ret<0 ?
913 ret = write_packet(s, &pkt);
915 s->streams[pkt.stream_index]->nb_frames++;
917 av_free_packet(&pkt);
921 if(s->pb && s->pb->error)
925 if (s->oformat->write_trailer)
926 ret = s->oformat->write_trailer(s);
932 ret = s->pb ? s->pb->error : 0;
933 for (i = 0; i < s->nb_streams; i++) {
934 av_freep(&s->streams[i]->priv_data);
935 av_freep(&s->streams[i]->index_entries);
937 if (s->oformat->priv_class)
938 av_opt_free(s->priv_data);
939 av_freep(&s->priv_data);
943 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
944 int64_t *dts, int64_t *wall)
946 if (!s->oformat || !s->oformat->get_output_timestamp)
947 return AVERROR(ENOSYS);
948 s->oformat->get_output_timestamp(s, stream, dts, wall);
952 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
953 AVFormatContext *src)
958 local_pkt.stream_index = dst_stream;
959 if (pkt->pts != AV_NOPTS_VALUE)
960 local_pkt.pts = av_rescale_q(pkt->pts,
961 src->streams[pkt->stream_index]->time_base,
962 dst->streams[dst_stream]->time_base);
963 if (pkt->dts != AV_NOPTS_VALUE)
964 local_pkt.dts = av_rescale_q(pkt->dts,
965 src->streams[pkt->stream_index]->time_base,
966 dst->streams[dst_stream]->time_base);
968 local_pkt.duration = av_rescale_q(pkt->duration,
969 src->streams[pkt->stream_index]->time_base,
970 dst->streams[dst_stream]->time_base);
971 return av_write_frame(dst, &local_pkt);
974 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
975 AVFrame *frame, int interleaved)
979 av_assert0(s->oformat);
980 if (!s->oformat->write_uncoded_frame)
981 return AVERROR(ENOSYS);
987 av_init_packet(&pkt);
988 pkt.data = (void *)frame;
989 pkt.size = UNCODED_FRAME_PACKET_SIZE;
991 pkt.dts = frame->pts;
992 pkt.duration = av_frame_get_pkt_duration(frame);
993 pkt.stream_index = stream_index;
994 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
997 return interleaved ? av_interleaved_write_frame(s, pktp) :
998 av_write_frame(s, pktp);
1001 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1004 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1007 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1010 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1013 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1015 av_assert0(s->oformat);
1016 if (!s->oformat->write_uncoded_frame)
1017 return AVERROR(ENOSYS);
1018 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1019 AV_WRITE_UNCODED_FRAME_QUERY);