2 * muxing functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "avio_internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
40 #include "audiointerleave.h"
49 * muxing functions for use within libavformat
52 /* fraction handling */
55 * f = val + (num / den) + 0.5.
57 * 'num' is normalized so that it is such as 0 <= num < den.
59 * @param f fractional number
60 * @param val integer value
61 * @param num must be >= 0
62 * @param den must be >= 1
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
77 * Fractional addition to f: f = f + (incr / f->den).
79 * @param f fractional number
80 * @param incr increment, can be positive or negative
82 static void frac_add(FFFrac *f, int64_t incr)
95 } else if (num >= den) {
102 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
109 for (j=2; j<14; j+= 1+(j>2))
110 while (q.den / q.num < min_precision && q.num % j == 0)
112 while (q.den / q.num < min_precision && q.den < (1<<24))
118 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
120 AVCodecParameters *par = st->codecpar;
121 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
123 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
124 return par->chroma_location;
127 if (pix_desc->log2_chroma_h == 0) {
128 return AVCHROMA_LOC_TOPLEFT;
129 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
130 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
131 switch (par->codec_id) {
132 case AV_CODEC_ID_MJPEG:
133 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
136 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
137 switch (par->codec_id) {
138 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
144 return AVCHROMA_LOC_UNSPECIFIED;
148 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
149 const char *format, const char *filename)
151 AVFormatContext *s = avformat_alloc_context();
160 oformat = av_guess_format(format, NULL, NULL);
162 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163 ret = AVERROR(EINVAL);
167 oformat = av_guess_format(NULL, filename, NULL);
169 ret = AVERROR(EINVAL);
170 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
177 s->oformat = oformat;
178 if (s->oformat->priv_data_size > 0) {
179 s->priv_data = av_mallocz(s->oformat->priv_data_size);
182 if (s->oformat->priv_class) {
183 *(const AVClass**)s->priv_data= s->oformat->priv_class;
184 av_opt_set_defaults(s->priv_data);
190 av_strlcpy(s->filename, filename, sizeof(s->filename));
191 if (!(s->url = av_strdup(filename)))
198 av_log(s, AV_LOG_ERROR, "Out of memory\n");
199 ret = AVERROR(ENOMEM);
201 avformat_free_context(s);
205 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
207 const AVCodecTag *avctag;
209 enum AVCodecID id = AV_CODEC_ID_NONE;
213 * Check that tag + id is in the table
214 * If neither is in the table -> OK
215 * If tag is in the table with another id -> FAIL
216 * If id is in the table with another tag -> FAIL unless strict < normal
218 for (n = 0; s->oformat->codec_tag[n]; n++) {
219 avctag = s->oformat->codec_tag[n];
220 while (avctag->id != AV_CODEC_ID_NONE) {
221 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
223 if (id == st->codecpar->codec_id)
226 if (avctag->id == st->codecpar->codec_id)
231 if (id != AV_CODEC_ID_NONE)
233 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
239 static int init_muxer(AVFormatContext *s, AVDictionary **options)
243 AVDictionary *tmp = NULL;
244 AVCodecParameters *par = NULL;
245 AVOutputFormat *of = s->oformat;
246 const AVCodecDescriptor *desc;
247 AVDictionaryEntry *e;
250 av_dict_copy(&tmp, *options, 0);
252 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
254 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
255 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
258 if (!s->url && !(s->url = av_strdup(s->filename))) {
259 ret = AVERROR(ENOMEM);
263 #if FF_API_LAVF_AVCTX
264 FF_DISABLE_DEPRECATION_WARNINGS
265 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
266 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
267 av_log(s, AV_LOG_WARNING,
268 "The AVFormatContext is not in set to bitexact mode, only "
269 "the AVCodecContext. If this is not intended, set "
270 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
273 FF_ENABLE_DEPRECATION_WARNINGS
276 // some sanity checks
277 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
278 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
279 ret = AVERROR(EINVAL);
283 for (i = 0; i < s->nb_streams; i++) {
287 #if FF_API_LAVF_AVCTX
288 FF_DISABLE_DEPRECATION_WARNINGS
289 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
290 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
291 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
292 "parameters to muxers is deprecated, use AVStream.codecpar "
294 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
298 FF_ENABLE_DEPRECATION_WARNINGS
301 if (!st->time_base.num) {
302 /* fall back on the default timebase values */
303 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
304 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
306 avpriv_set_pts_info(st, 33, 1, 90000);
309 switch (par->codec_type) {
310 case AVMEDIA_TYPE_AUDIO:
311 if (par->sample_rate <= 0) {
312 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
313 ret = AVERROR(EINVAL);
316 if (!par->block_align)
317 par->block_align = par->channels *
318 av_get_bits_per_sample(par->codec_id) >> 3;
320 case AVMEDIA_TYPE_VIDEO:
321 if ((par->width <= 0 || par->height <= 0) &&
322 !(of->flags & AVFMT_NODIMENSIONS)) {
323 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
324 ret = AVERROR(EINVAL);
327 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
328 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
330 if (st->sample_aspect_ratio.num != 0 &&
331 st->sample_aspect_ratio.den != 0 &&
332 par->sample_aspect_ratio.num != 0 &&
333 par->sample_aspect_ratio.den != 0) {
334 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
335 "(%d/%d) and encoder layer (%d/%d)\n",
336 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
337 par->sample_aspect_ratio.num,
338 par->sample_aspect_ratio.den);
339 ret = AVERROR(EINVAL);
346 desc = avcodec_descriptor_get(par->codec_id);
347 if (desc && desc->props & AV_CODEC_PROP_REORDER)
348 st->internal->reorder = 1;
352 && par->codec_id == AV_CODEC_ID_RAWVIDEO
353 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
354 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
355 && !validate_codec_tag(s, st)) {
356 // the current rawvideo encoding system ends up setting
357 // the wrong codec_tag for avi/mov, we override it here
360 if (par->codec_tag) {
361 if (!validate_codec_tag(s, st)) {
362 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
363 av_log(s, AV_LOG_ERROR,
364 "Tag %s incompatible with output codec id '%d' (%s)\n",
365 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
366 ret = AVERROR_INVALIDDATA;
370 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
373 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
374 s->internal->nb_interleaved_streams++;
377 if (!s->priv_data && of->priv_data_size > 0) {
378 s->priv_data = av_mallocz(of->priv_data_size);
380 ret = AVERROR(ENOMEM);
383 if (of->priv_class) {
384 *(const AVClass **)s->priv_data = of->priv_class;
385 av_opt_set_defaults(s->priv_data);
386 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
391 /* set muxer identification string */
392 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
393 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
395 av_dict_set(&s->metadata, "encoder", NULL, 0);
398 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
399 av_dict_set(&s->metadata, e->key, NULL, 0);
403 av_dict_free(options);
407 if (s->oformat->init) {
408 if ((ret = s->oformat->init(s)) < 0) {
409 if (s->oformat->deinit)
410 s->oformat->deinit(s);
423 static int init_pts(AVFormatContext *s)
428 /* init PTS generation */
429 for (i = 0; i < s->nb_streams; i++) {
430 int64_t den = AV_NOPTS_VALUE;
433 switch (st->codecpar->codec_type) {
434 case AVMEDIA_TYPE_AUDIO:
435 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
437 case AVMEDIA_TYPE_VIDEO:
438 den = (int64_t)st->time_base.num * st->time_base.den;
444 if (!st->internal->priv_pts)
445 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
446 if (!st->internal->priv_pts)
447 return AVERROR(ENOMEM);
449 if (den != AV_NOPTS_VALUE) {
451 return AVERROR_INVALIDDATA;
453 frac_init(st->internal->priv_pts, 0, 0, den);
457 if (s->avoid_negative_ts < 0) {
458 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
459 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
460 s->avoid_negative_ts = 0;
462 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
468 static void flush_if_needed(AVFormatContext *s)
470 if (s->pb && s->pb->error >= 0) {
471 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
473 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
474 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
478 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
482 if ((ret = init_muxer(s, options)) < 0)
485 s->internal->initialized = 1;
486 s->internal->streams_initialized = ret;
488 if (s->oformat->init && ret) {
489 if ((ret = init_pts(s)) < 0)
492 return AVSTREAM_INIT_IN_INIT_OUTPUT;
495 return AVSTREAM_INIT_IN_WRITE_HEADER;
498 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
501 int already_initialized = s->internal->initialized;
502 int streams_already_initialized = s->internal->streams_initialized;
504 if (!already_initialized)
505 if ((ret = avformat_init_output(s, options)) < 0)
508 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
509 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
510 if (s->oformat->write_header) {
511 ret = s->oformat->write_header(s);
512 if (ret >= 0 && s->pb && s->pb->error < 0)
518 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
519 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
521 if (!s->internal->streams_initialized) {
522 if ((ret = init_pts(s)) < 0)
526 return streams_already_initialized;
529 if (s->oformat->deinit)
530 s->oformat->deinit(s);
534 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
536 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
537 it is only being used internally to this file as a consistency check.
538 The value is chosen to be very unlikely to appear on its own and to cause
539 immediate failure if used anywhere as a real size. */
540 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
543 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
544 FF_DISABLE_DEPRECATION_WARNINGS
545 //FIXME merge with compute_pkt_fields
546 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
548 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
552 if (!s->internal->missing_ts_warning &&
553 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
554 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
555 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
556 av_log(s, AV_LOG_WARNING,
557 "Timestamps are unset in a packet for stream %d. "
558 "This is deprecated and will stop working in the future. "
559 "Fix your code to set the timestamps properly\n", st->index);
560 s->internal->missing_ts_warning = 1;
563 if (s->debug & FF_FDEBUG_TS)
564 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
565 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
567 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
568 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
569 pkt->duration, pkt->stream_index);
574 if (pkt->duration == 0) {
575 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
577 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
581 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
584 //XXX/FIXME this is a temporary hack until all encoders output pts
585 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
588 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
592 // pkt->pts= st->cur_dts;
593 pkt->pts = st->internal->priv_pts->val;
596 //calculate dts from pts
597 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
598 st->pts_buffer[0] = pkt->pts;
599 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
600 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
601 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
602 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
604 pkt->dts = st->pts_buffer[0];
607 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
608 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
609 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
610 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
611 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
612 av_log(s, AV_LOG_ERROR,
613 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
614 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
615 return AVERROR(EINVAL);
617 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
618 av_log(s, AV_LOG_ERROR,
619 "pts (%s) < dts (%s) in stream %d\n",
620 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
622 return AVERROR(EINVAL);
625 if (s->debug & FF_FDEBUG_TS)
626 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
627 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
629 st->cur_dts = pkt->dts;
630 st->internal->priv_pts->val = pkt->dts;
633 switch (st->codecpar->codec_type) {
634 case AVMEDIA_TYPE_AUDIO:
635 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
636 ((AVFrame *)pkt->data)->nb_samples :
637 av_get_audio_frame_duration(st->codec, pkt->size);
639 /* HACK/FIXME, we skip the initial 0 size packets as they are most
640 * likely equal to the encoder delay, but it would be better if we
641 * had the real timestamps from the encoder */
642 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
643 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
646 case AVMEDIA_TYPE_VIDEO:
647 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
652 FF_ENABLE_DEPRECATION_WARNINGS
656 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
659 * FIXME: this function should NEVER get undefined pts/dts beside when the
660 * AVFMT_NOTIMESTAMPS is set.
661 * Those additional safety checks should be dropped once the correct checks
662 * are set in the callers.
664 static int write_packet(AVFormatContext *s, AVPacket *pkt)
667 int64_t pts_backup, dts_backup;
669 pts_backup = pkt->pts;
670 dts_backup = pkt->dts;
672 // If the timestamp offsetting below is adjusted, adjust
673 // ff_interleaved_peek similarly.
674 if (s->output_ts_offset) {
675 AVStream *st = s->streams[pkt->stream_index];
676 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
678 if (pkt->dts != AV_NOPTS_VALUE)
680 if (pkt->pts != AV_NOPTS_VALUE)
684 if (s->avoid_negative_ts > 0) {
685 AVStream *st = s->streams[pkt->stream_index];
686 int64_t offset = st->mux_ts_offset;
687 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
689 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
690 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
691 s->internal->offset = -ts;
692 s->internal->offset_timebase = st->time_base;
695 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
696 offset = st->mux_ts_offset =
697 av_rescale_q_rnd(s->internal->offset,
698 s->internal->offset_timebase,
703 if (pkt->dts != AV_NOPTS_VALUE)
705 if (pkt->pts != AV_NOPTS_VALUE)
708 if (s->internal->avoid_negative_ts_use_pts) {
709 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
710 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
711 "pts %s in stream %d.\n"
712 "Try -avoid_negative_ts 1 as a possible workaround.\n",
718 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
719 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
720 av_log(s, AV_LOG_WARNING,
721 "Packets poorly interleaved, failed to avoid negative "
722 "timestamp %s in stream %d.\n"
723 "Try -max_interleave_delta 0 as a possible workaround.\n",
731 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
732 AVFrame *frame = (AVFrame *)pkt->data;
733 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
734 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
735 av_frame_free(&frame);
737 ret = s->oformat->write_packet(s, pkt);
740 if (s->pb && ret >= 0) {
742 if (s->pb->error < 0)
747 pkt->pts = pts_backup;
748 pkt->dts = dts_backup;
754 static int check_packet(AVFormatContext *s, AVPacket *pkt)
759 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
760 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
762 return AVERROR(EINVAL);
765 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
766 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
767 return AVERROR(EINVAL);
773 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
777 ret = check_packet(s, pkt);
781 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
782 /* sanitize the timestamps */
783 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
784 AVStream *st = s->streams[pkt->stream_index];
786 /* when there is no reordering (so dts is equal to pts), but
787 * only one of them is set, set the other as well */
788 if (!st->internal->reorder) {
789 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
791 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
795 /* check that the timestamps are set */
796 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
797 av_log(s, AV_LOG_ERROR,
798 "Timestamps are unset in a packet for stream %d\n", st->index);
799 return AVERROR(EINVAL);
802 /* check that the dts are increasing (or at least non-decreasing,
803 * if the format allows it */
804 if (st->cur_dts != AV_NOPTS_VALUE &&
805 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
806 st->cur_dts > pkt->dts)) {
807 av_log(s, AV_LOG_ERROR,
808 "Application provided invalid, non monotonically increasing "
809 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
810 st->index, st->cur_dts, pkt->dts);
811 return AVERROR(EINVAL);
814 if (pkt->pts < pkt->dts) {
815 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
816 pkt->pts, pkt->dts, st->index);
817 return AVERROR(EINVAL);
825 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
826 AVStream *st = s->streams[pkt->stream_index];
829 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
832 if (s->oformat->check_bitstream) {
833 if (!st->internal->bitstream_checked) {
834 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
837 st->internal->bitstream_checked = 1;
841 for (i = 0; i < st->internal->nb_bsfcs; i++) {
842 AVBSFContext *ctx = st->internal->bsfcs[i];
843 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
844 // flush each stream's BSF chain on write_trailer.
845 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
846 av_log(ctx, AV_LOG_ERROR,
847 "Failed to send packet to filter %s for stream %d\n",
848 ctx->filter->name, pkt->stream_index);
851 // TODO: when any automatically-added bitstream filter is generating multiple
852 // output packets for a single input one, we'll need to call this in a loop
853 // and write each output packet.
854 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
855 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
857 av_log(ctx, AV_LOG_ERROR,
858 "Failed to send packet to filter %s for stream %d\n",
859 ctx->filter->name, pkt->stream_index);
860 if (s->error_recognition & AV_EF_EXPLODE)
868 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
872 ret = prepare_input_packet(s, pkt);
877 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
878 ret = s->oformat->write_packet(s, NULL);
880 if (ret >= 0 && s->pb && s->pb->error < 0)
887 ret = do_packet_auto_bsf(s, pkt);
891 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
892 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
894 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
898 ret = write_packet(s, pkt);
899 if (ret >= 0 && s->pb && s->pb->error < 0)
903 s->streams[pkt->stream_index]->nb_frames++;
907 #define CHUNK_START 0x1000
909 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
910 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
913 AVPacketList **next_point, *this_pktl;
914 AVStream *st = s->streams[pkt->stream_index];
915 int chunked = s->max_chunk_size || s->max_chunk_duration;
917 this_pktl = av_mallocz(sizeof(AVPacketList));
919 return AVERROR(ENOMEM);
920 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
921 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
922 av_assert0(((AVFrame *)pkt->data)->buf);
923 this_pktl->pkt = *pkt;
925 pkt->side_data = NULL;
926 pkt->side_data_elems = 0;
928 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
934 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
935 next_point = &(st->last_in_packet_buffer->next);
937 next_point = &s->internal->packet_buffer;
941 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
942 st->interleaver_chunk_size += pkt->size;
943 st->interleaver_chunk_duration += pkt->duration;
944 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
945 || (max && st->interleaver_chunk_duration > max)) {
946 st->interleaver_chunk_size = 0;
947 this_pktl->pkt.flags |= CHUNK_START;
948 if (max && st->interleaver_chunk_duration > max) {
949 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
950 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
952 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
954 st->interleaver_chunk_duration = 0;
958 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
961 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
963 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
964 || !compare(s, &(*next_point)->pkt, pkt)))
965 next_point = &(*next_point)->next;
969 next_point = &(s->internal->packet_buffer_end->next);
972 av_assert1(!*next_point);
974 s->internal->packet_buffer_end = this_pktl;
977 this_pktl->next = *next_point;
979 s->streams[pkt->stream_index]->last_in_packet_buffer =
980 *next_point = this_pktl;
982 av_packet_unref(pkt);
987 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
990 AVStream *st = s->streams[pkt->stream_index];
991 AVStream *st2 = s->streams[next->stream_index];
992 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
994 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
995 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
996 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
998 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
999 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
1002 comp= (ts>ts2) - (ts<ts2);
1006 return pkt->stream_index < next->stream_index;
1010 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1011 AVPacket *pkt, int flush)
1014 int stream_count = 0;
1015 int noninterleaved_count = 0;
1020 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1024 for (i = 0; i < s->nb_streams; i++) {
1025 if (s->streams[i]->last_in_packet_buffer) {
1027 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1028 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1029 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1030 ++noninterleaved_count;
1034 if (s->internal->nb_interleaved_streams == stream_count)
1037 if (s->max_interleave_delta > 0 &&
1038 s->internal->packet_buffer &&
1040 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1042 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1043 int64_t delta_dts = INT64_MIN;
1044 int64_t top_dts = av_rescale_q(top_pkt->dts,
1045 s->streams[top_pkt->stream_index]->time_base,
1048 for (i = 0; i < s->nb_streams; i++) {
1050 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1055 last_dts = av_rescale_q(last->pkt.dts,
1056 s->streams[i]->time_base,
1058 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1061 if (delta_dts > s->max_interleave_delta) {
1062 av_log(s, AV_LOG_DEBUG,
1063 "Delay between the first packet and last packet in the "
1064 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1065 delta_dts, s->max_interleave_delta);
1070 if (s->internal->packet_buffer &&
1072 (s->flags & AVFMT_FLAG_SHORTEST) &&
1073 s->internal->shortest_end == AV_NOPTS_VALUE) {
1074 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1076 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1077 s->streams[top_pkt->stream_index]->time_base,
1081 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1082 while (s->internal->packet_buffer) {
1083 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1085 int64_t top_dts = av_rescale_q(top_pkt->dts,
1086 s->streams[top_pkt->stream_index]->time_base,
1089 if (s->internal->shortest_end + 1 >= top_dts)
1092 pktl = s->internal->packet_buffer;
1093 st = s->streams[pktl->pkt.stream_index];
1095 s->internal->packet_buffer = pktl->next;
1096 if (!s->internal->packet_buffer)
1097 s->internal->packet_buffer_end = NULL;
1099 if (st->last_in_packet_buffer == pktl)
1100 st->last_in_packet_buffer = NULL;
1102 av_packet_unref(&pktl->pkt);
1108 if (stream_count && flush) {
1110 pktl = s->internal->packet_buffer;
1112 st = s->streams[out->stream_index];
1114 s->internal->packet_buffer = pktl->next;
1115 if (!s->internal->packet_buffer)
1116 s->internal->packet_buffer_end = NULL;
1118 if (st->last_in_packet_buffer == pktl)
1119 st->last_in_packet_buffer = NULL;
1124 av_init_packet(out);
1129 int ff_interleaved_peek(AVFormatContext *s, int stream,
1130 AVPacket *pkt, int add_offset)
1132 AVPacketList *pktl = s->internal->packet_buffer;
1134 if (pktl->pkt.stream_index == stream) {
1137 AVStream *st = s->streams[pkt->stream_index];
1138 int64_t offset = st->mux_ts_offset;
1140 if (s->output_ts_offset)
1141 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1143 if (pkt->dts != AV_NOPTS_VALUE)
1145 if (pkt->pts != AV_NOPTS_VALUE)
1152 return AVERROR(ENOENT);
1156 * Interleave an AVPacket correctly so it can be muxed.
1157 * @param out the interleaved packet will be output here
1158 * @param in the input packet
1159 * @param flush 1 if no further packets are available as input and all
1160 * remaining packets should be output
1161 * @return 1 if a packet was output, 0 if no packet could be output,
1162 * < 0 if an error occurred
1164 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1166 if (s->oformat->interleave_packet) {
1167 int ret = s->oformat->interleave_packet(s, out, in, flush);
1169 av_packet_unref(in);
1172 return ff_interleave_packet_per_dts(s, out, in, flush);
1175 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1179 ret = prepare_input_packet(s, pkt);
1184 AVStream *st = s->streams[pkt->stream_index];
1186 ret = do_packet_auto_bsf(s, pkt);
1192 if (s->debug & FF_FDEBUG_TS)
1193 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1194 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1196 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1197 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1201 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1202 ret = AVERROR(EINVAL);
1206 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1212 int ret = interleave_packet(s, &opkt, pkt, flush);
1214 memset(pkt, 0, sizeof(*pkt));
1215 av_init_packet(pkt);
1218 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1221 ret = write_packet(s, &opkt);
1223 s->streams[opkt.stream_index]->nb_frames++;
1225 av_packet_unref(&opkt);
1229 if(s->pb && s->pb->error)
1230 return s->pb->error;
1233 av_packet_unref(pkt);
1237 int av_write_trailer(AVFormatContext *s)
1243 ret = interleave_packet(s, &pkt, NULL, 1);
1249 ret = write_packet(s, &pkt);
1251 s->streams[pkt.stream_index]->nb_frames++;
1253 av_packet_unref(&pkt);
1257 if(s->pb && s->pb->error)
1262 if (s->oformat->write_trailer) {
1263 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1264 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1266 ret = s->oformat->write_trailer(s);
1268 s->oformat->write_trailer(s);
1272 if (s->oformat->deinit)
1273 s->oformat->deinit(s);
1275 s->internal->initialized =
1276 s->internal->streams_initialized = 0;
1281 ret = s->pb ? s->pb->error : 0;
1282 for (i = 0; i < s->nb_streams; i++) {
1283 av_freep(&s->streams[i]->priv_data);
1284 av_freep(&s->streams[i]->index_entries);
1286 if (s->oformat->priv_class)
1287 av_opt_free(s->priv_data);
1288 av_freep(&s->priv_data);
1292 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1293 int64_t *dts, int64_t *wall)
1295 if (!s->oformat || !s->oformat->get_output_timestamp)
1296 return AVERROR(ENOSYS);
1297 s->oformat->get_output_timestamp(s, stream, dts, wall);
1301 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1302 AVFormatContext *src, int interleave)
1308 local_pkt.stream_index = dst_stream;
1309 if (pkt->pts != AV_NOPTS_VALUE)
1310 local_pkt.pts = av_rescale_q(pkt->pts,
1311 src->streams[pkt->stream_index]->time_base,
1312 dst->streams[dst_stream]->time_base);
1313 if (pkt->dts != AV_NOPTS_VALUE)
1314 local_pkt.dts = av_rescale_q(pkt->dts,
1315 src->streams[pkt->stream_index]->time_base,
1316 dst->streams[dst_stream]->time_base);
1318 local_pkt.duration = av_rescale_q(pkt->duration,
1319 src->streams[pkt->stream_index]->time_base,
1320 dst->streams[dst_stream]->time_base);
1322 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1323 else ret = av_write_frame(dst, &local_pkt);
1324 pkt->buf = local_pkt.buf;
1325 pkt->side_data = local_pkt.side_data;
1326 pkt->side_data_elems = local_pkt.side_data_elems;
1330 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1331 AVFrame *frame, int interleaved)
1333 AVPacket pkt, *pktp;
1335 av_assert0(s->oformat);
1336 if (!s->oformat->write_uncoded_frame)
1337 return AVERROR(ENOSYS);
1343 av_init_packet(&pkt);
1344 pkt.data = (void *)frame;
1345 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1347 pkt.dts = frame->pts;
1348 pkt.duration = frame->pkt_duration;
1349 pkt.stream_index = stream_index;
1350 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1353 return interleaved ? av_interleaved_write_frame(s, pktp) :
1354 av_write_frame(s, pktp);
1357 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1360 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1363 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1366 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1369 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1371 av_assert0(s->oformat);
1372 if (!s->oformat->write_uncoded_frame)
1373 return AVERROR(ENOSYS);
1374 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1375 AV_WRITE_UNCODED_FRAME_QUERY);