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
24 #include "libavcodec/internal.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/timestamp.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/mathematics.h"
36 * muxing functions for use within libavformat
39 /* fraction handling */
42 * f = val + (num / den) + 0.5.
44 * 'num' is normalized so that it is such as 0 <= num < den.
46 * @param f fractional number
47 * @param val integer value
48 * @param num must be >= 0
49 * @param den must be >= 1
51 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
64 * Fractional addition to f: f = f + (incr / f->den).
66 * @param f fractional number
67 * @param incr increment, can be positive or negative
69 static void frac_add(FFFrac *f, int64_t incr)
82 } else if (num >= den) {
89 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
96 for (j=2; j<14; j+= 1+(j>2))
97 while (q.den / q.num < min_precision && q.num % j == 0)
99 while (q.den / q.num < min_precision && q.den < (1<<24))
105 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
107 AVCodecParameters *par = st->codecpar;
108 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
110 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
111 return par->chroma_location;
114 if (pix_desc->log2_chroma_h == 0) {
115 return AVCHROMA_LOC_TOPLEFT;
116 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
117 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
118 switch (par->codec_id) {
119 case AV_CODEC_ID_MJPEG:
120 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
123 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
124 switch (par->codec_id) {
125 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
131 return AVCHROMA_LOC_UNSPECIFIED;
135 int avformat_alloc_output_context2(AVFormatContext **avctx, ff_const59 AVOutputFormat *oformat,
136 const char *format, const char *filename)
138 AVFormatContext *s = avformat_alloc_context();
147 oformat = av_guess_format(format, NULL, NULL);
149 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
150 ret = AVERROR(EINVAL);
154 oformat = av_guess_format(NULL, filename, NULL);
156 ret = AVERROR(EINVAL);
157 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
164 s->oformat = oformat;
165 if (s->oformat->priv_data_size > 0) {
166 s->priv_data = av_mallocz(s->oformat->priv_data_size);
169 if (s->oformat->priv_class) {
170 *(const AVClass**)s->priv_data= s->oformat->priv_class;
171 av_opt_set_defaults(s->priv_data);
177 #if FF_API_FORMAT_FILENAME
178 FF_DISABLE_DEPRECATION_WARNINGS
179 av_strlcpy(s->filename, filename, sizeof(s->filename));
180 FF_ENABLE_DEPRECATION_WARNINGS
182 if (!(s->url = av_strdup(filename)))
189 av_log(s, AV_LOG_ERROR, "Out of memory\n");
190 ret = AVERROR(ENOMEM);
192 avformat_free_context(s);
196 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
198 const AVCodecTag *avctag;
200 enum AVCodecID id = AV_CODEC_ID_NONE;
204 * Check that tag + id is in the table
205 * If neither is in the table -> OK
206 * If tag is in the table with another id -> FAIL
207 * If id is in the table with another tag -> FAIL unless strict < normal
209 for (n = 0; s->oformat->codec_tag[n]; n++) {
210 avctag = s->oformat->codec_tag[n];
211 while (avctag->id != AV_CODEC_ID_NONE) {
212 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
214 if (id == st->codecpar->codec_id)
217 if (avctag->id == st->codecpar->codec_id)
222 if (id != AV_CODEC_ID_NONE)
224 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
230 static int init_muxer(AVFormatContext *s, AVDictionary **options)
234 AVDictionary *tmp = NULL;
235 AVCodecParameters *par = NULL;
236 const AVOutputFormat *of = s->oformat;
237 const AVCodecDescriptor *desc;
238 AVDictionaryEntry *e;
241 av_dict_copy(&tmp, *options, 0);
243 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
245 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
246 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
249 #if FF_API_FORMAT_FILENAME
250 FF_DISABLE_DEPRECATION_WARNINGS
251 if (!s->url && !(s->url = av_strdup(s->filename))) {
252 FF_ENABLE_DEPRECATION_WARNINGS
254 if (!s->url && !(s->url = av_strdup(""))) {
256 ret = AVERROR(ENOMEM);
260 #if FF_API_LAVF_AVCTX
261 FF_DISABLE_DEPRECATION_WARNINGS
262 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
263 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
264 av_log(s, AV_LOG_WARNING,
265 "The AVFormatContext is not in set to bitexact mode, only "
266 "the AVCodecContext. If this is not intended, set "
267 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
270 FF_ENABLE_DEPRECATION_WARNINGS
273 // some sanity checks
274 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
275 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
276 ret = AVERROR(EINVAL);
280 for (i = 0; i < s->nb_streams; i++) {
284 #if FF_API_LAVF_AVCTX
285 FF_DISABLE_DEPRECATION_WARNINGS
286 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
287 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
288 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
289 "parameters to muxers is deprecated, use AVStream.codecpar "
291 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
295 FF_ENABLE_DEPRECATION_WARNINGS
298 if (!st->time_base.num) {
299 /* fall back on the default timebase values */
300 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
301 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
303 avpriv_set_pts_info(st, 33, 1, 90000);
306 switch (par->codec_type) {
307 case AVMEDIA_TYPE_AUDIO:
308 if (par->sample_rate <= 0) {
309 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
310 ret = AVERROR(EINVAL);
313 if (!par->block_align)
314 par->block_align = par->channels *
315 av_get_bits_per_sample(par->codec_id) >> 3;
317 case AVMEDIA_TYPE_VIDEO:
318 if ((par->width <= 0 || par->height <= 0) &&
319 !(of->flags & AVFMT_NODIMENSIONS)) {
320 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
321 ret = AVERROR(EINVAL);
324 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
325 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
327 if (st->sample_aspect_ratio.num != 0 &&
328 st->sample_aspect_ratio.den != 0 &&
329 par->sample_aspect_ratio.num != 0 &&
330 par->sample_aspect_ratio.den != 0) {
331 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
332 "(%d/%d) and encoder layer (%d/%d)\n",
333 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
334 par->sample_aspect_ratio.num,
335 par->sample_aspect_ratio.den);
336 ret = AVERROR(EINVAL);
343 desc = avcodec_descriptor_get(par->codec_id);
344 if (desc && desc->props & AV_CODEC_PROP_REORDER)
345 st->internal->reorder = 1;
347 st->internal->is_intra_only = ff_is_intra_only(par->codec_id);
351 && par->codec_id == AV_CODEC_ID_RAWVIDEO
352 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
353 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
354 && !validate_codec_tag(s, st)) {
355 // the current rawvideo encoding system ends up setting
356 // the wrong codec_tag for avi/mov, we override it here
359 if (par->codec_tag) {
360 if (!validate_codec_tag(s, st)) {
361 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
362 av_log(s, AV_LOG_ERROR,
363 "Tag %s incompatible with output codec id '%d' (%s)\n",
364 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
365 ret = AVERROR_INVALIDDATA;
369 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
372 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
373 s->internal->nb_interleaved_streams++;
376 if (!s->priv_data && of->priv_data_size > 0) {
377 s->priv_data = av_mallocz(of->priv_data_size);
379 ret = AVERROR(ENOMEM);
382 if (of->priv_class) {
383 *(const AVClass **)s->priv_data = of->priv_class;
384 av_opt_set_defaults(s->priv_data);
385 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
390 /* set muxer identification string */
391 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
392 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
394 av_dict_set(&s->metadata, "encoder", NULL, 0);
397 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
398 av_dict_set(&s->metadata, e->key, NULL, 0);
402 av_dict_free(options);
406 if (s->oformat->init) {
407 if ((ret = s->oformat->init(s)) < 0) {
408 if (s->oformat->deinit)
409 s->oformat->deinit(s);
422 static int init_pts(AVFormatContext *s)
427 /* init PTS generation */
428 for (i = 0; i < s->nb_streams; i++) {
429 int64_t den = AV_NOPTS_VALUE;
432 switch (st->codecpar->codec_type) {
433 case AVMEDIA_TYPE_AUDIO:
434 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
436 case AVMEDIA_TYPE_VIDEO:
437 den = (int64_t)st->time_base.num * st->time_base.den;
443 if (!st->internal->priv_pts)
444 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
445 if (!st->internal->priv_pts)
446 return AVERROR(ENOMEM);
448 if (den != AV_NOPTS_VALUE) {
450 return AVERROR_INVALIDDATA;
452 frac_init(st->internal->priv_pts, 0, 0, den);
456 if (s->avoid_negative_ts < 0) {
457 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
458 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
459 s->avoid_negative_ts = 0;
461 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
467 static void flush_if_needed(AVFormatContext *s)
469 if (s->pb && s->pb->error >= 0) {
470 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
472 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
473 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
477 static void deinit_muxer(AVFormatContext *s)
479 if (s->oformat && s->oformat->deinit && s->internal->initialized)
480 s->oformat->deinit(s);
481 s->internal->initialized =
482 s->internal->streams_initialized = 0;
485 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
489 if ((ret = init_muxer(s, options)) < 0)
492 s->internal->initialized = 1;
493 s->internal->streams_initialized = ret;
495 if (s->oformat->init && ret) {
496 if ((ret = init_pts(s)) < 0)
499 return AVSTREAM_INIT_IN_INIT_OUTPUT;
502 return AVSTREAM_INIT_IN_WRITE_HEADER;
505 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
508 int already_initialized = s->internal->initialized;
509 int streams_already_initialized = s->internal->streams_initialized;
511 if (!already_initialized)
512 if ((ret = avformat_init_output(s, options)) < 0)
515 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
516 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
517 if (s->oformat->write_header) {
518 ret = s->oformat->write_header(s);
519 if (ret >= 0 && s->pb && s->pb->error < 0)
525 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
526 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
528 if (!s->internal->streams_initialized) {
529 if ((ret = init_pts(s)) < 0)
533 return streams_already_initialized;
540 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
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_DEBUG, "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_DEBUG, "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 * Shift timestamps and call muxer; the original pts/dts are not kept.
658 * FIXME: this function should NEVER get undefined pts/dts beside when the
659 * AVFMT_NOTIMESTAMPS is set.
660 * Those additional safety checks should be dropped once the correct checks
661 * are set in the callers.
663 static int write_packet(AVFormatContext *s, AVPacket *pkt)
667 // If the timestamp offsetting below is adjusted, adjust
668 // ff_interleaved_peek similarly.
669 if (s->output_ts_offset) {
670 AVStream *st = s->streams[pkt->stream_index];
671 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
673 if (pkt->dts != AV_NOPTS_VALUE)
675 if (pkt->pts != AV_NOPTS_VALUE)
679 if (s->avoid_negative_ts > 0) {
680 AVStream *st = s->streams[pkt->stream_index];
681 int64_t offset = st->mux_ts_offset;
682 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
684 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
685 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
686 s->internal->offset = -ts;
687 s->internal->offset_timebase = st->time_base;
690 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
691 offset = st->mux_ts_offset =
692 av_rescale_q_rnd(s->internal->offset,
693 s->internal->offset_timebase,
698 if (pkt->dts != AV_NOPTS_VALUE)
700 if (pkt->pts != AV_NOPTS_VALUE)
703 if (s->internal->avoid_negative_ts_use_pts) {
704 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
705 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
706 "pts %s in stream %d.\n"
707 "Try -avoid_negative_ts 1 as a possible workaround.\n",
713 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
714 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
715 av_log(s, AV_LOG_WARNING,
716 "Packets poorly interleaved, failed to avoid negative "
717 "timestamp %s in stream %d.\n"
718 "Try -max_interleave_delta 0 as a possible workaround.\n",
726 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
727 AVFrame **frame = (AVFrame **)pkt->data;
728 av_assert0(pkt->size == sizeof(*frame));
729 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
731 ret = s->oformat->write_packet(s, pkt);
734 if (s->pb && ret >= 0) {
736 if (s->pb->error < 0)
741 s->streams[pkt->stream_index]->nb_frames++;
746 static int check_packet(AVFormatContext *s, AVPacket *pkt)
748 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
749 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
751 return AVERROR(EINVAL);
754 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
755 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
756 return AVERROR(EINVAL);
762 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
765 AVStream *st = s->streams[pkt->stream_index];
767 ret = check_packet(s, pkt);
771 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
772 /* sanitize the timestamps */
773 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
775 /* when there is no reordering (so dts is equal to pts), but
776 * only one of them is set, set the other as well */
777 if (!st->internal->reorder) {
778 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
780 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
784 /* check that the timestamps are set */
785 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
786 av_log(s, AV_LOG_ERROR,
787 "Timestamps are unset in a packet for stream %d\n", st->index);
788 return AVERROR(EINVAL);
791 /* check that the dts are increasing (or at least non-decreasing,
792 * if the format allows it */
793 if (st->cur_dts != AV_NOPTS_VALUE &&
794 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
795 st->cur_dts > pkt->dts)) {
796 av_log(s, AV_LOG_ERROR,
797 "Application provided invalid, non monotonically increasing "
798 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
799 st->index, st->cur_dts, pkt->dts);
800 return AVERROR(EINVAL);
803 if (pkt->pts < pkt->dts) {
804 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
805 pkt->pts, pkt->dts, st->index);
806 return AVERROR(EINVAL);
811 if (st->internal->is_intra_only)
812 pkt->flags |= AV_PKT_FLAG_KEY;
817 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
818 AVStream *st = s->streams[pkt->stream_index];
821 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
824 if (s->oformat->check_bitstream) {
825 if (!st->internal->bitstream_checked) {
826 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
829 st->internal->bitstream_checked = 1;
833 if (st->internal->bsfc) {
834 AVBSFContext *ctx = st->internal->bsfc;
835 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
836 // flush each stream's BSF chain on write_trailer.
837 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
838 av_log(ctx, AV_LOG_ERROR,
839 "Failed to send packet to filter %s for stream %d\n",
840 ctx->filter->name, pkt->stream_index);
843 // TODO: when any automatically-added bitstream filter is generating multiple
844 // output packets for a single input one, we'll need to call this in a loop
845 // and write each output packet.
846 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
847 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
849 av_log(ctx, AV_LOG_ERROR,
850 "Failed to receive packet from filter %s for stream %d\n",
851 ctx->filter->name, pkt->stream_index);
852 if (s->error_recognition & AV_EF_EXPLODE)
860 int av_write_frame(AVFormatContext *s, AVPacket *in)
862 AVPacket local_pkt, *pkt = &local_pkt;
866 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
867 ret = s->oformat->write_packet(s, NULL);
869 if (ret >= 0 && s->pb && s->pb->error < 0)
876 if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
879 /* We don't own in, so we have to make sure not to modify it.
880 * The following avoids copying in's data unnecessarily.
881 * Copying side data is unavoidable as a bitstream filter
882 * may change it, e.g. free it on errors. */
884 pkt->data = in->data;
885 pkt->size = in->size;
886 ret = av_packet_copy_props(pkt, in);
890 pkt->buf = av_buffer_ref(in->buf);
892 ret = AVERROR(ENOMEM);
898 ret = prepare_input_packet(s, pkt);
902 ret = do_packet_auto_bsf(s, pkt);
906 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
907 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
909 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
913 ret = write_packet(s, pkt);
916 // Uncoded frames using the noninterleaved codepath are also freed here
917 av_packet_unref(pkt);
921 #define CHUNK_START 0x1000
923 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
924 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
927 AVPacketList **next_point, *this_pktl;
928 AVStream *st = s->streams[pkt->stream_index];
929 int chunked = s->max_chunk_size || s->max_chunk_duration;
931 this_pktl = av_malloc(sizeof(AVPacketList));
933 av_packet_unref(pkt);
934 return AVERROR(ENOMEM);
936 if ((ret = av_packet_make_refcounted(pkt)) < 0) {
938 av_packet_unref(pkt);
942 av_packet_move_ref(&this_pktl->pkt, pkt);
943 pkt = &this_pktl->pkt;
945 if (st->last_in_packet_buffer) {
946 next_point = &(st->last_in_packet_buffer->next);
948 next_point = &s->internal->packet_buffer;
952 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
953 st->interleaver_chunk_size += pkt->size;
954 st->interleaver_chunk_duration += pkt->duration;
955 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
956 || (max && st->interleaver_chunk_duration > max)) {
957 st->interleaver_chunk_size = 0;
958 pkt->flags |= CHUNK_START;
959 if (max && st->interleaver_chunk_duration > max) {
960 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
961 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
963 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
965 st->interleaver_chunk_duration = 0;
969 if (chunked && !(pkt->flags & CHUNK_START))
972 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
974 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
975 || !compare(s, &(*next_point)->pkt, pkt)))
976 next_point = &(*next_point)->next;
980 next_point = &(s->internal->packet_buffer_end->next);
983 av_assert1(!*next_point);
985 s->internal->packet_buffer_end = this_pktl;
988 this_pktl->next = *next_point;
990 st->last_in_packet_buffer = *next_point = this_pktl;
995 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
998 AVStream *st = s->streams[pkt->stream_index];
999 AVStream *st2 = s->streams[next->stream_index];
1000 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1002 if (s->audio_preload) {
1003 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1004 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1005 if (preload != preload2) {
1007 preload *= s->audio_preload;
1008 preload2 *= s->audio_preload;
1009 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
1010 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
1012 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
1013 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
1016 comp = (ts2 > ts) - (ts2 < ts);
1021 return pkt->stream_index < next->stream_index;
1025 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1026 AVPacket *pkt, int flush)
1029 int stream_count = 0;
1030 int noninterleaved_count = 0;
1035 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1039 for (i = 0; i < s->nb_streams; i++) {
1040 if (s->streams[i]->last_in_packet_buffer) {
1042 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1043 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1044 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1045 ++noninterleaved_count;
1049 if (s->internal->nb_interleaved_streams == stream_count)
1052 if (s->max_interleave_delta > 0 &&
1053 s->internal->packet_buffer &&
1055 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1057 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1058 int64_t delta_dts = INT64_MIN;
1059 int64_t top_dts = av_rescale_q(top_pkt->dts,
1060 s->streams[top_pkt->stream_index]->time_base,
1063 for (i = 0; i < s->nb_streams; i++) {
1065 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1070 last_dts = av_rescale_q(last->pkt.dts,
1071 s->streams[i]->time_base,
1073 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1076 if (delta_dts > s->max_interleave_delta) {
1077 av_log(s, AV_LOG_DEBUG,
1078 "Delay between the first packet and last packet in the "
1079 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1080 delta_dts, s->max_interleave_delta);
1085 if (s->internal->packet_buffer &&
1087 (s->flags & AVFMT_FLAG_SHORTEST) &&
1088 s->internal->shortest_end == AV_NOPTS_VALUE) {
1089 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1091 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1092 s->streams[top_pkt->stream_index]->time_base,
1096 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1097 while (s->internal->packet_buffer) {
1098 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1100 int64_t top_dts = av_rescale_q(top_pkt->dts,
1101 s->streams[top_pkt->stream_index]->time_base,
1104 if (s->internal->shortest_end + 1 >= top_dts)
1107 pktl = s->internal->packet_buffer;
1108 st = s->streams[pktl->pkt.stream_index];
1110 s->internal->packet_buffer = pktl->next;
1111 if (!s->internal->packet_buffer)
1112 s->internal->packet_buffer_end = NULL;
1114 if (st->last_in_packet_buffer == pktl)
1115 st->last_in_packet_buffer = NULL;
1117 av_packet_unref(&pktl->pkt);
1123 if (stream_count && flush) {
1125 pktl = s->internal->packet_buffer;
1127 st = s->streams[out->stream_index];
1129 s->internal->packet_buffer = pktl->next;
1130 if (!s->internal->packet_buffer)
1131 s->internal->packet_buffer_end = NULL;
1133 if (st->last_in_packet_buffer == pktl)
1134 st->last_in_packet_buffer = NULL;
1143 int ff_interleaved_peek(AVFormatContext *s, int stream,
1144 AVPacket *pkt, int add_offset)
1146 AVPacketList *pktl = s->internal->packet_buffer;
1148 if (pktl->pkt.stream_index == stream) {
1151 AVStream *st = s->streams[pkt->stream_index];
1152 int64_t offset = st->mux_ts_offset;
1154 if (s->output_ts_offset)
1155 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1157 if (pkt->dts != AV_NOPTS_VALUE)
1159 if (pkt->pts != AV_NOPTS_VALUE)
1166 return AVERROR(ENOENT);
1170 * Interleave an AVPacket correctly so it can be muxed.
1171 * @param out the interleaved packet will be output here
1172 * @param in the input packet; will always be blank on return if not NULL
1173 * @param flush 1 if no further packets are available as input and all
1174 * remaining packets should be output
1175 * @return 1 if a packet was output, 0 if no packet could be output,
1176 * < 0 if an error occurred
1178 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1180 if (s->oformat->interleave_packet) {
1181 int ret = s->oformat->interleave_packet(s, out, in, flush);
1183 av_packet_unref(in);
1186 return ff_interleave_packet_per_dts(s, out, in, flush);
1189 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1194 AVStream *st = s->streams[pkt->stream_index];
1196 ret = prepare_input_packet(s, pkt);
1200 ret = do_packet_auto_bsf(s, pkt);
1206 if (s->debug & FF_FDEBUG_TS)
1207 av_log(s, AV_LOG_DEBUG, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1208 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1210 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1211 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1215 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1216 ret = AVERROR(EINVAL);
1220 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1226 int ret = interleave_packet(s, &opkt, pkt, flush);
1232 ret = write_packet(s, &opkt);
1234 av_packet_unref(&opkt);
1240 av_packet_unref(pkt);
1244 int av_write_trailer(AVFormatContext *s)
1250 ret = interleave_packet(s, &pkt, NULL, 1);
1256 ret = write_packet(s, &pkt);
1258 av_packet_unref(&pkt);
1265 if (s->oformat->write_trailer) {
1266 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1267 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1269 ret = s->oformat->write_trailer(s);
1271 s->oformat->write_trailer(s);
1280 ret = s->pb ? s->pb->error : 0;
1281 for (i = 0; i < s->nb_streams; i++) {
1282 av_freep(&s->streams[i]->priv_data);
1283 av_freep(&s->streams[i]->index_entries);
1285 if (s->oformat->priv_class)
1286 av_opt_free(s->priv_data);
1287 av_freep(&s->priv_data);
1291 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1292 int64_t *dts, int64_t *wall)
1294 if (!s->oformat || !s->oformat->get_output_timestamp)
1295 return AVERROR(ENOSYS);
1296 s->oformat->get_output_timestamp(s, stream, dts, wall);
1300 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1301 AVFormatContext *src, int interleave)
1307 local_pkt.stream_index = dst_stream;
1309 av_packet_rescale_ts(&local_pkt,
1310 src->streams[pkt->stream_index]->time_base,
1311 dst->streams[dst_stream]->time_base);
1313 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1314 else ret = av_write_frame(dst, &local_pkt);
1315 pkt->buf = local_pkt.buf;
1316 pkt->side_data = local_pkt.side_data;
1317 pkt->side_data_elems = local_pkt.side_data_elems;
1321 static void uncoded_frame_free(void *unused, uint8_t *data)
1323 av_frame_free((AVFrame **)data);
1327 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1328 AVFrame *frame, int interleaved)
1330 AVPacket pkt, *pktp;
1332 av_assert0(s->oformat);
1333 if (!s->oformat->write_uncoded_frame) {
1334 av_frame_free(&frame);
1335 return AVERROR(ENOSYS);
1341 size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1342 AVFrame **framep = av_mallocz(bufsize);
1347 av_init_packet(&pkt);
1348 pkt.buf = av_buffer_create((void *)framep, bufsize,
1349 uncoded_frame_free, NULL, 0);
1353 av_frame_free(&frame);
1354 return AVERROR(ENOMEM);
1358 pkt.data = (void *)framep;
1359 pkt.size = sizeof(frame);
1361 pkt.dts = frame->pts;
1362 pkt.duration = frame->pkt_duration;
1363 pkt.stream_index = stream_index;
1364 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1367 return interleaved ? av_interleaved_write_frame(s, pktp) :
1368 av_write_frame(s, pktp);
1371 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1374 return write_uncoded_frame_internal(s, stream_index, frame, 0);
1377 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1380 return write_uncoded_frame_internal(s, stream_index, frame, 1);
1383 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1385 av_assert0(s->oformat);
1386 if (!s->oformat->write_uncoded_frame)
1387 return AVERROR(ENOSYS);
1388 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1389 AV_WRITE_UNCODED_FRAME_QUERY);