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_precission)
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_precission && q.num % j == 0)
118 while (q.den / q.num < min_precission && 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;
230 av_dict_copy(&tmp, *options, 0);
232 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
234 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
235 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
238 // some sanity checks
239 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
240 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
241 ret = AVERROR(EINVAL);
245 for (i = 0; i < s->nb_streams; i++) {
249 switch (codec->codec_type) {
250 case AVMEDIA_TYPE_AUDIO:
251 if (codec->sample_rate <= 0) {
252 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
253 ret = AVERROR(EINVAL);
256 if (!codec->block_align)
257 codec->block_align = codec->channels *
258 av_get_bits_per_sample(codec->codec_id) >> 3;
260 case AVMEDIA_TYPE_VIDEO:
261 if (codec->time_base.num <= 0 ||
262 codec->time_base.den <= 0) { //FIXME audio too?
263 av_log(s, AV_LOG_ERROR, "time base not set\n");
264 ret = AVERROR(EINVAL);
268 if ((codec->width <= 0 || codec->height <= 0) &&
269 !(of->flags & AVFMT_NODIMENSIONS)) {
270 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
271 ret = AVERROR(EINVAL);
274 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
275 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
277 if (st->sample_aspect_ratio.num != 0 &&
278 st->sample_aspect_ratio.den != 0 &&
279 codec->sample_aspect_ratio.den != 0 &&
280 codec->sample_aspect_ratio.den != 0) {
281 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
282 "(%d/%d) and encoder layer (%d/%d)\n",
283 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
284 codec->sample_aspect_ratio.num,
285 codec->sample_aspect_ratio.den);
286 ret = AVERROR(EINVAL);
294 if ( codec->codec_tag
295 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
296 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
297 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
298 && !validate_codec_tag(s, st)) {
299 // the current rawvideo encoding system ends up setting
300 // the wrong codec_tag for avi/mov, we override it here
301 codec->codec_tag = 0;
303 if (codec->codec_tag) {
304 if (!validate_codec_tag(s, st)) {
305 char tagbuf[32], tagbuf2[32];
306 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
307 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
308 av_log(s, AV_LOG_ERROR,
309 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
310 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
311 ret = AVERROR_INVALIDDATA;
315 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
318 if (of->flags & AVFMT_GLOBALHEADER &&
319 !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
320 av_log(s, AV_LOG_WARNING,
321 "Codec for stream %d does not use global headers "
322 "but container format requires global headers\n", i);
324 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
325 s->internal->nb_interleaved_streams++;
328 if (!s->priv_data && of->priv_data_size > 0) {
329 s->priv_data = av_mallocz(of->priv_data_size);
331 ret = AVERROR(ENOMEM);
334 if (of->priv_class) {
335 *(const AVClass **)s->priv_data = of->priv_class;
336 av_opt_set_defaults(s->priv_data);
337 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
342 /* set muxer identification string */
343 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
344 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
346 av_dict_set(&s->metadata, "encoder", NULL, 0);
350 av_dict_free(options);
361 static int init_pts(AVFormatContext *s)
366 /* init PTS generation */
367 for (i = 0; i < s->nb_streams; i++) {
368 int64_t den = AV_NOPTS_VALUE;
371 switch (st->codec->codec_type) {
372 case AVMEDIA_TYPE_AUDIO:
373 den = (int64_t)st->time_base.num * st->codec->sample_rate;
375 case AVMEDIA_TYPE_VIDEO:
376 den = (int64_t)st->time_base.num * st->codec->time_base.den;
381 if (den != AV_NOPTS_VALUE) {
383 return AVERROR_INVALIDDATA;
385 frac_init(&st->pts, 0, 0, den);
392 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
396 if (ret = init_muxer(s, options))
399 if (s->oformat->write_header) {
400 ret = s->oformat->write_header(s);
401 if (ret >= 0 && s->pb && s->pb->error < 0)
407 if ((ret = init_pts(s)) < 0)
410 if (s->avoid_negative_ts < 0) {
411 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
412 s->avoid_negative_ts = 0;
414 s->avoid_negative_ts = 1;
420 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
422 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
423 it is only being used internally to this file as a consistency check.
424 The value is chosen to be very unlikely to appear on its own and to cause
425 immediate failure if used anywhere as a real size. */
426 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
429 //FIXME merge with compute_pkt_fields
430 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
432 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
433 int num, den, frame_size, i;
435 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
436 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
439 if (pkt->duration == 0) {
440 ff_compute_frame_duration(&num, &den, st, NULL, pkt);
442 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
446 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
449 //XXX/FIXME this is a temporary hack until all encoders output pts
450 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
453 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
457 // pkt->pts= st->cur_dts;
458 pkt->pts = st->pts.val;
461 //calculate dts from pts
462 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
463 st->pts_buffer[0] = pkt->pts;
464 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
465 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
466 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
467 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
469 pkt->dts = st->pts_buffer[0];
472 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
473 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
474 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
475 av_log(s, AV_LOG_ERROR,
476 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
477 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
478 return AVERROR(EINVAL);
480 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
481 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
482 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
483 return AVERROR(EINVAL);
486 av_dlog(s, "av_write_frame: pts2:%s dts2:%s\n",
487 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
488 st->cur_dts = pkt->dts;
489 st->pts.val = pkt->dts;
492 switch (st->codec->codec_type) {
493 case AVMEDIA_TYPE_AUDIO:
494 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
495 ((AVFrame *)pkt->data)->nb_samples :
496 ff_get_audio_frame_size(st->codec, pkt->size, 1);
498 /* HACK/FIXME, we skip the initial 0 size packets as they are most
499 * likely equal to the encoder delay, but it would be better if we
500 * had the real timestamps from the encoder */
501 if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
502 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
505 case AVMEDIA_TYPE_VIDEO:
506 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
515 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
518 * FIXME: this function should NEVER get undefined pts/dts beside when the
519 * AVFMT_NOTIMESTAMPS is set.
520 * Those additional safety checks should be dropped once the correct checks
521 * are set in the callers.
523 static int write_packet(AVFormatContext *s, AVPacket *pkt)
527 if (s->output_ts_offset) {
528 AVStream *st = s->streams[pkt->stream_index];
529 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
531 if (pkt->dts != AV_NOPTS_VALUE)
533 if (pkt->pts != AV_NOPTS_VALUE)
537 if (s->avoid_negative_ts > 0) {
538 AVStream *st = s->streams[pkt->stream_index];
539 int64_t offset = st->mux_ts_offset;
541 if ((pkt->dts < 0 || s->avoid_negative_ts == 2) && pkt->dts != AV_NOPTS_VALUE && !s->offset) {
542 s->offset = -pkt->dts;
543 s->offset_timebase = st->time_base;
546 if (s->offset && !offset) {
547 offset = st->mux_ts_offset =
548 av_rescale_q_rnd(s->offset,
554 if (pkt->dts != AV_NOPTS_VALUE)
556 if (pkt->pts != AV_NOPTS_VALUE)
559 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0);
562 did_split = av_packet_split_side_data(pkt);
563 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
564 AVFrame *frame = (AVFrame *)pkt->data;
565 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
566 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
567 av_frame_free(&frame);
569 ret = s->oformat->write_packet(s, pkt);
572 if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
576 av_packet_merge_side_data(pkt);
581 static int check_packet(AVFormatContext *s, AVPacket *pkt)
586 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
587 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
589 return AVERROR(EINVAL);
592 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
593 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
594 return AVERROR(EINVAL);
600 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
604 ret = check_packet(s, pkt);
609 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
610 ret = s->oformat->write_packet(s, NULL);
611 if (s->flush_packets && s->pb && s->pb->error >= 0)
613 if (ret >= 0 && s->pb && s->pb->error < 0)
620 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
622 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
625 ret = write_packet(s, pkt);
626 if (ret >= 0 && s->pb && s->pb->error < 0)
630 s->streams[pkt->stream_index]->nb_frames++;
634 #define CHUNK_START 0x1000
636 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
637 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
639 AVPacketList **next_point, *this_pktl;
640 AVStream *st = s->streams[pkt->stream_index];
641 int chunked = s->max_chunk_size || s->max_chunk_duration;
644 this_pktl = av_mallocz(sizeof(AVPacketList));
646 return AVERROR(ENOMEM);
647 this_pktl->pkt = *pkt;
648 #if FF_API_DESTRUCT_PACKET
649 FF_DISABLE_DEPRECATION_WARNINGS
650 pkt->destruct = NULL; // do not free original but only the copy
651 FF_ENABLE_DEPRECATION_WARNINGS
654 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
655 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
656 av_assert0(((AVFrame *)pkt->data)->buf);
658 // duplicate the packet if it uses non-allocated memory
659 if ((ret = av_dup_packet(&this_pktl->pkt)) < 0) {
663 av_copy_packet_side_data(&this_pktl->pkt, &this_pktl->pkt); // copy side data
666 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
667 next_point = &(st->last_in_packet_buffer->next);
669 next_point = &s->packet_buffer;
673 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
674 st->interleaver_chunk_size += pkt->size;
675 st->interleaver_chunk_duration += pkt->duration;
676 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
677 || (max && st->interleaver_chunk_duration > max)) {
678 st->interleaver_chunk_size = 0;
679 this_pktl->pkt.flags |= CHUNK_START;
680 if (max && st->interleaver_chunk_duration > max) {
681 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
682 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
684 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
686 st->interleaver_chunk_duration = 0;
690 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
693 if (compare(s, &s->packet_buffer_end->pkt, pkt)) {
695 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
696 || !compare(s, &(*next_point)->pkt, pkt)))
697 next_point = &(*next_point)->next;
701 next_point = &(s->packet_buffer_end->next);
704 av_assert1(!*next_point);
706 s->packet_buffer_end = this_pktl;
709 this_pktl->next = *next_point;
711 s->streams[pkt->stream_index]->last_in_packet_buffer =
712 *next_point = this_pktl;
716 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
719 AVStream *st = s->streams[pkt->stream_index];
720 AVStream *st2 = s->streams[next->stream_index];
721 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
723 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
724 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);
725 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);
727 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
728 -( 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;
731 comp= (ts>ts2) - (ts<ts2);
735 return pkt->stream_index < next->stream_index;
739 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
740 AVPacket *pkt, int flush)
743 int stream_count = 0, noninterleaved_count = 0;
747 ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts);
752 for (i = 0; i < s->nb_streams; i++) {
753 if (s->streams[i]->last_in_packet_buffer) {
755 } else if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
756 ++noninterleaved_count;
760 if (s->internal->nb_interleaved_streams == stream_count)
763 if (s->max_interleave_delta > 0 && s->packet_buffer && !flush) {
764 AVPacket *top_pkt = &s->packet_buffer->pkt;
765 int64_t delta_dts = INT64_MIN;
766 int64_t top_dts = av_rescale_q(top_pkt->dts,
767 s->streams[top_pkt->stream_index]->time_base,
770 for (i = 0; i < s->nb_streams; i++) {
772 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
777 last_dts = av_rescale_q(last->pkt.dts,
778 s->streams[i]->time_base,
780 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
783 if (delta_dts > s->max_interleave_delta) {
784 av_log(s, AV_LOG_DEBUG,
785 "Delay between the first packet and last packet in the "
786 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
787 delta_dts, s->max_interleave_delta);
792 if (stream_count && flush) {
794 pktl = s->packet_buffer;
796 st = s->streams[out->stream_index];
798 s->packet_buffer = pktl->next;
799 if (!s->packet_buffer)
800 s->packet_buffer_end = NULL;
802 if (st->last_in_packet_buffer == pktl)
803 st->last_in_packet_buffer = NULL;
814 * Interleave an AVPacket correctly so it can be muxed.
815 * @param out the interleaved packet will be output here
816 * @param in the input packet
817 * @param flush 1 if no further packets are available as input and all
818 * remaining packets should be output
819 * @return 1 if a packet was output, 0 if no packet could be output,
820 * < 0 if an error occurred
822 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
824 if (s->oformat->interleave_packet) {
825 int ret = s->oformat->interleave_packet(s, out, in, flush);
830 return ff_interleave_packet_per_dts(s, out, in, flush);
833 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
837 ret = check_packet(s, pkt);
842 AVStream *st = s->streams[pkt->stream_index];
844 //FIXME/XXX/HACK drop zero sized packets
845 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size == 0) {
850 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
851 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
852 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
855 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
856 ret = AVERROR(EINVAL);
860 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
866 int ret = interleave_packet(s, &opkt, pkt, flush);
868 memset(pkt, 0, sizeof(*pkt));
872 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
875 ret = write_packet(s, &opkt);
877 s->streams[opkt.stream_index]->nb_frames++;
879 av_free_packet(&opkt);
883 if(s->pb && s->pb->error)
887 av_packet_unref(pkt);
891 int av_write_trailer(AVFormatContext *s)
897 ret = interleave_packet(s, &pkt, NULL, 1);
898 if (ret < 0) //FIXME cleanup needed for ret<0 ?
903 ret = write_packet(s, &pkt);
905 s->streams[pkt.stream_index]->nb_frames++;
907 av_free_packet(&pkt);
911 if(s->pb && s->pb->error)
915 if (s->oformat->write_trailer)
916 ret = s->oformat->write_trailer(s);
922 ret = s->pb ? s->pb->error : 0;
923 for (i = 0; i < s->nb_streams; i++) {
924 av_freep(&s->streams[i]->priv_data);
925 av_freep(&s->streams[i]->index_entries);
927 if (s->oformat->priv_class)
928 av_opt_free(s->priv_data);
929 av_freep(&s->priv_data);
933 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
934 int64_t *dts, int64_t *wall)
936 if (!s->oformat || !s->oformat->get_output_timestamp)
937 return AVERROR(ENOSYS);
938 s->oformat->get_output_timestamp(s, stream, dts, wall);
942 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
943 AVFormatContext *src)
948 local_pkt.stream_index = dst_stream;
949 if (pkt->pts != AV_NOPTS_VALUE)
950 local_pkt.pts = av_rescale_q(pkt->pts,
951 src->streams[pkt->stream_index]->time_base,
952 dst->streams[dst_stream]->time_base);
953 if (pkt->dts != AV_NOPTS_VALUE)
954 local_pkt.dts = av_rescale_q(pkt->dts,
955 src->streams[pkt->stream_index]->time_base,
956 dst->streams[dst_stream]->time_base);
958 local_pkt.duration = av_rescale_q(pkt->duration,
959 src->streams[pkt->stream_index]->time_base,
960 dst->streams[dst_stream]->time_base);
961 return av_write_frame(dst, &local_pkt);
964 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
965 AVFrame *frame, int interleaved)
969 av_assert0(s->oformat);
970 if (!s->oformat->write_uncoded_frame)
971 return AVERROR(ENOSYS);
977 av_init_packet(&pkt);
978 pkt.data = (void *)frame;
979 pkt.size = UNCODED_FRAME_PACKET_SIZE;
981 pkt.dts = frame->pts;
982 pkt.duration = av_frame_get_pkt_duration(frame);
983 pkt.stream_index = stream_index;
984 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
987 return interleaved ? av_interleaved_write_frame(s, pktp) :
988 av_write_frame(s, pktp);
991 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
994 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
997 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1000 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1003 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1005 av_assert0(s->oformat);
1006 if (!s->oformat->write_uncoded_frame)
1007 return AVERROR(ENOSYS);
1008 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1009 AV_WRITE_UNCODED_FRAME_QUERY);