mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
684 lines
18 KiB
C
684 lines
18 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdatomic.h>
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#include <stdio.h>
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#include <string.h>
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#include "ffmpeg.h"
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#include "objpool.h"
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#include "sync_queue.h"
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#include "thread_queue.h"
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#include "libavutil/fifo.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/timestamp.h"
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#include "libavutil/thread.h"
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#include "libavcodec/packet.h"
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#include "libavformat/avformat.h"
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#include "libavformat/avio.h"
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typedef struct MuxStream {
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/* the packets are buffered here until the muxer is ready to be initialized */
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AVFifo *muxing_queue;
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/*
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* The size of the AVPackets' buffers in queue.
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* Updated when a packet is either pushed or pulled from the queue.
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*/
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size_t muxing_queue_data_size;
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/* dts of the last packet sent to the muxer, in the stream timebase
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* used for making up missing dts values */
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int64_t last_mux_dts;
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} MuxStream;
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struct Muxer {
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AVFormatContext *fc;
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pthread_t thread;
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ThreadQueue *tq;
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MuxStream *streams;
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AVDictionary *opts;
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int thread_queue_size;
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/* filesize limit expressed in bytes */
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int64_t limit_filesize;
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atomic_int_least64_t last_filesize;
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int header_written;
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AVPacket *sq_pkt;
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};
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static int want_sdp = 1;
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static int64_t filesize(AVIOContext *pb)
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{
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int64_t ret = -1;
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if (pb) {
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ret = avio_size(pb);
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if (ret <= 0) // FIXME improve avio_size() so it works with non seekable output too
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ret = avio_tell(pb);
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}
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return ret;
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}
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static int write_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
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{
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MuxStream *ms = &of->mux->streams[ost->index];
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AVFormatContext *s = of->mux->fc;
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AVStream *st = ost->st;
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int64_t fs;
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int ret;
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fs = filesize(s->pb);
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atomic_store(&of->mux->last_filesize, fs);
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if (fs >= of->mux->limit_filesize) {
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ret = AVERROR_EOF;
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goto fail;
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}
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if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && ost->vsync_method == VSYNC_DROP) ||
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(st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && audio_sync_method < 0))
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pkt->pts = pkt->dts = AV_NOPTS_VALUE;
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (ost->frame_rate.num && ost->is_cfr) {
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if (pkt->duration > 0)
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av_log(NULL, AV_LOG_WARNING, "Overriding packet duration by frame rate, this should not happen\n");
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pkt->duration = av_rescale_q(1, av_inv_q(ost->frame_rate),
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ost->mux_timebase);
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}
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}
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av_packet_rescale_ts(pkt, ost->mux_timebase, ost->st->time_base);
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if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
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if (pkt->dts != AV_NOPTS_VALUE &&
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pkt->pts != AV_NOPTS_VALUE &&
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pkt->dts > pkt->pts) {
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av_log(s, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64" in output stream %d:%d, replacing by guess\n",
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pkt->dts, pkt->pts,
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ost->file_index, ost->st->index);
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pkt->pts =
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pkt->dts = pkt->pts + pkt->dts + ms->last_mux_dts + 1
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- FFMIN3(pkt->pts, pkt->dts, ms->last_mux_dts + 1)
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- FFMAX3(pkt->pts, pkt->dts, ms->last_mux_dts + 1);
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}
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if ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO || st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) &&
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pkt->dts != AV_NOPTS_VALUE &&
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ms->last_mux_dts != AV_NOPTS_VALUE) {
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int64_t max = ms->last_mux_dts + !(s->oformat->flags & AVFMT_TS_NONSTRICT);
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if (pkt->dts < max) {
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int loglevel = max - pkt->dts > 2 || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
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if (exit_on_error)
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loglevel = AV_LOG_ERROR;
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av_log(s, loglevel, "Non-monotonous DTS in output stream "
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"%d:%d; previous: %"PRId64", current: %"PRId64"; ",
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ost->file_index, ost->st->index, ms->last_mux_dts, pkt->dts);
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if (exit_on_error) {
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ret = AVERROR(EINVAL);
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goto fail;
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}
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av_log(s, loglevel, "changing to %"PRId64". This may result "
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"in incorrect timestamps in the output file.\n",
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max);
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if (pkt->pts >= pkt->dts)
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pkt->pts = FFMAX(pkt->pts, max);
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pkt->dts = max;
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}
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}
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}
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ms->last_mux_dts = pkt->dts;
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ost->data_size += pkt->size;
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atomic_fetch_add(&ost->packets_written, 1);
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pkt->stream_index = ost->index;
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if (debug_ts) {
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av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
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"pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s size:%d\n",
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av_get_media_type_string(st->codecpar->codec_type),
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av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
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av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
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av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ost->st->time_base),
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pkt->size
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);
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}
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ret = av_interleaved_write_frame(s, pkt);
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if (ret < 0) {
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print_error("av_interleaved_write_frame()", ret);
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goto fail;
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}
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return 0;
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fail:
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av_packet_unref(pkt);
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return ret;
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}
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static int sync_queue_process(OutputFile *of, OutputStream *ost, AVPacket *pkt)
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{
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if (ost->sq_idx_mux >= 0) {
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int ret = sq_send(of->sq_mux, ost->sq_idx_mux, SQPKT(pkt));
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if (ret < 0)
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return ret;
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while (1) {
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ret = sq_receive(of->sq_mux, -1, SQPKT(of->mux->sq_pkt));
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if (ret < 0)
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return (ret == AVERROR_EOF || ret == AVERROR(EAGAIN)) ? 0 : ret;
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ret = write_packet(of, output_streams[of->ost_index + ret],
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of->mux->sq_pkt);
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if (ret < 0)
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return ret;
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}
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} else if (pkt)
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return write_packet(of, ost, pkt);
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return 0;
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}
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static void *muxer_thread(void *arg)
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{
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OutputFile *of = arg;
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Muxer *mux = of->mux;
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AVPacket *pkt = NULL;
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int ret = 0;
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pkt = av_packet_alloc();
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if (!pkt) {
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ret = AVERROR(ENOMEM);
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goto finish;
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}
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while (1) {
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OutputStream *ost;
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int stream_idx;
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ret = tq_receive(mux->tq, &stream_idx, pkt);
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if (stream_idx < 0) {
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av_log(NULL, AV_LOG_VERBOSE,
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"All streams finished for output file #%d\n", of->index);
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ret = 0;
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break;
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}
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ost = output_streams[of->ost_index + stream_idx];
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ret = sync_queue_process(of, ost, ret < 0 ? NULL : pkt);
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av_packet_unref(pkt);
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if (ret == AVERROR_EOF)
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tq_receive_finish(mux->tq, stream_idx);
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else if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR,
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"Error muxing a packet for output file #%d\n", of->index);
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break;
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}
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}
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finish:
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av_packet_free(&pkt);
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for (unsigned int i = 0; i < mux->fc->nb_streams; i++)
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tq_receive_finish(mux->tq, i);
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av_log(NULL, AV_LOG_VERBOSE, "Terminating muxer thread %d\n", of->index);
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return (void*)(intptr_t)ret;
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}
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static int submit_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
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{
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Muxer *mux = of->mux;
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int ret = 0;
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if (!pkt || ost->finished & MUXER_FINISHED)
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goto finish;
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ret = tq_send(mux->tq, ost->index, pkt);
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if (ret < 0)
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goto finish;
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return 0;
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finish:
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if (pkt)
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av_packet_unref(pkt);
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ost->finished |= MUXER_FINISHED;
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tq_send_finish(mux->tq, ost->index);
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return ret == AVERROR_EOF ? 0 : ret;
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}
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static int queue_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
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{
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MuxStream *ms = &of->mux->streams[ost->index];
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AVPacket *tmp_pkt = NULL;
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int ret;
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if (!av_fifo_can_write(ms->muxing_queue)) {
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size_t cur_size = av_fifo_can_read(ms->muxing_queue);
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size_t pkt_size = pkt ? pkt->size : 0;
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unsigned int are_we_over_size =
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(ms->muxing_queue_data_size + pkt_size) > ost->muxing_queue_data_threshold;
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size_t limit = are_we_over_size ? ost->max_muxing_queue_size : SIZE_MAX;
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size_t new_size = FFMIN(2 * cur_size, limit);
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if (new_size <= cur_size) {
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av_log(NULL, AV_LOG_ERROR,
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"Too many packets buffered for output stream %d:%d.\n",
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ost->file_index, ost->st->index);
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return AVERROR(ENOSPC);
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}
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ret = av_fifo_grow2(ms->muxing_queue, new_size - cur_size);
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if (ret < 0)
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return ret;
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}
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if (pkt) {
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ret = av_packet_make_refcounted(pkt);
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if (ret < 0)
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return ret;
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tmp_pkt = av_packet_alloc();
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if (!tmp_pkt)
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return AVERROR(ENOMEM);
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av_packet_move_ref(tmp_pkt, pkt);
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ms->muxing_queue_data_size += tmp_pkt->size;
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}
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av_fifo_write(ms->muxing_queue, &tmp_pkt, 1);
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return 0;
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}
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int of_submit_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
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{
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int ret;
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if (of->mux->tq) {
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return submit_packet(of, ost, pkt);
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} else {
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/* the muxer is not initialized yet, buffer the packet */
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ret = queue_packet(of, ost, pkt);
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if (ret < 0) {
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av_packet_unref(pkt);
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return ret;
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}
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}
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return 0;
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}
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static int thread_stop(OutputFile *of)
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{
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Muxer *mux = of->mux;
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void *ret;
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if (!mux || !mux->tq)
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return 0;
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for (unsigned int i = 0; i < mux->fc->nb_streams; i++)
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tq_send_finish(mux->tq, i);
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pthread_join(mux->thread, &ret);
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tq_free(&mux->tq);
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return (int)(intptr_t)ret;
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}
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static void pkt_move(void *dst, void *src)
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{
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av_packet_move_ref(dst, src);
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}
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static int thread_start(OutputFile *of)
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{
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Muxer *mux = of->mux;
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AVFormatContext *fc = mux->fc;
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ObjPool *op;
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int ret;
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op = objpool_alloc_packets();
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if (!op)
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return AVERROR(ENOMEM);
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mux->tq = tq_alloc(fc->nb_streams, mux->thread_queue_size, op, pkt_move);
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if (!mux->tq) {
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objpool_free(&op);
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return AVERROR(ENOMEM);
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}
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ret = pthread_create(&mux->thread, NULL, muxer_thread, (void*)of);
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if (ret) {
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tq_free(&mux->tq);
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return AVERROR(ret);
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}
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/* flush the muxing queues */
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for (int i = 0; i < fc->nb_streams; i++) {
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MuxStream *ms = &of->mux->streams[i];
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OutputStream *ost = output_streams[of->ost_index + i];
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AVPacket *pkt;
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/* try to improve muxing time_base (only possible if nothing has been written yet) */
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if (!av_fifo_can_read(ms->muxing_queue))
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ost->mux_timebase = ost->st->time_base;
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while (av_fifo_read(ms->muxing_queue, &pkt, 1) >= 0) {
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ret = submit_packet(of, ost, pkt);
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if (pkt) {
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ms->muxing_queue_data_size -= pkt->size;
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av_packet_free(&pkt);
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}
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if (ret < 0)
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return ret;
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}
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}
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return 0;
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}
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static int print_sdp(void)
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{
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char sdp[16384];
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int i;
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int j, ret;
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AVIOContext *sdp_pb;
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AVFormatContext **avc;
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for (i = 0; i < nb_output_files; i++) {
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if (!output_files[i]->mux->header_written)
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return 0;
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}
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avc = av_malloc_array(nb_output_files, sizeof(*avc));
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if (!avc)
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return AVERROR(ENOMEM);
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for (i = 0, j = 0; i < nb_output_files; i++) {
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if (!strcmp(output_files[i]->format->name, "rtp")) {
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avc[j] = output_files[i]->mux->fc;
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j++;
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}
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}
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if (!j) {
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av_log(NULL, AV_LOG_ERROR, "No output streams in the SDP.\n");
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ret = AVERROR(EINVAL);
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goto fail;
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}
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ret = av_sdp_create(avc, j, sdp, sizeof(sdp));
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if (ret < 0)
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goto fail;
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if (!sdp_filename) {
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printf("SDP:\n%s\n", sdp);
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fflush(stdout);
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} else {
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ret = avio_open2(&sdp_pb, sdp_filename, AVIO_FLAG_WRITE, &int_cb, NULL);
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", sdp_filename);
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goto fail;
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}
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avio_print(sdp_pb, sdp);
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avio_closep(&sdp_pb);
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av_freep(&sdp_filename);
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}
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// SDP successfully written, allow muxer threads to start
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ret = 1;
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fail:
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av_freep(&avc);
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return ret;
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}
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/* open the muxer when all the streams are initialized */
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int of_check_init(OutputFile *of)
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{
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AVFormatContext *fc = of->mux->fc;
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int ret, i;
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for (i = 0; i < fc->nb_streams; i++) {
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OutputStream *ost = output_streams[of->ost_index + i];
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if (!ost->initialized)
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return 0;
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}
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ret = avformat_write_header(fc, &of->mux->opts);
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR,
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"Could not write header for output file #%d "
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"(incorrect codec parameters ?): %s\n",
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of->index, av_err2str(ret));
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return ret;
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}
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//assert_avoptions(of->opts);
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of->mux->header_written = 1;
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av_dump_format(fc, of->index, fc->url, 1);
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nb_output_dumped++;
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if (sdp_filename || want_sdp) {
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ret = print_sdp();
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR, "Error writing the SDP.\n");
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return ret;
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} else if (ret == 1) {
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/* SDP is written only after all the muxers are ready, so now we
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* start ALL the threads */
|
|
for (i = 0; i < nb_output_files; i++) {
|
|
ret = thread_start(output_files[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
} else {
|
|
ret = thread_start(of);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int of_write_trailer(OutputFile *of)
|
|
{
|
|
AVFormatContext *fc = of->mux->fc;
|
|
int ret;
|
|
|
|
if (!of->mux->tq) {
|
|
av_log(NULL, AV_LOG_ERROR,
|
|
"Nothing was written into output file %d (%s), because "
|
|
"at least one of its streams received no packets.\n",
|
|
of->index, fc->url);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
ret = thread_stop(of);
|
|
if (ret < 0)
|
|
main_return_code = ret;
|
|
|
|
ret = av_write_trailer(fc);
|
|
if (ret < 0) {
|
|
av_log(NULL, AV_LOG_ERROR, "Error writing trailer of %s: %s\n", fc->url, av_err2str(ret));
|
|
return ret;
|
|
}
|
|
|
|
of->mux->last_filesize = filesize(fc->pb);
|
|
|
|
if (!(of->format->flags & AVFMT_NOFILE)) {
|
|
ret = avio_closep(&fc->pb);
|
|
if (ret < 0) {
|
|
av_log(NULL, AV_LOG_ERROR, "Error closing file %s: %s\n",
|
|
fc->url, av_err2str(ret));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fc_close(AVFormatContext **pfc)
|
|
{
|
|
AVFormatContext *fc = *pfc;
|
|
|
|
if (!fc)
|
|
return;
|
|
|
|
if (!(fc->oformat->flags & AVFMT_NOFILE))
|
|
avio_closep(&fc->pb);
|
|
avformat_free_context(fc);
|
|
|
|
*pfc = NULL;
|
|
}
|
|
|
|
static void mux_free(Muxer **pmux)
|
|
{
|
|
Muxer *mux = *pmux;
|
|
|
|
if (!mux)
|
|
return;
|
|
|
|
for (int i = 0; i < mux->fc->nb_streams; i++) {
|
|
MuxStream *ms = &mux->streams[i];
|
|
AVPacket *pkt;
|
|
|
|
if (!ms->muxing_queue)
|
|
continue;
|
|
|
|
while (av_fifo_read(ms->muxing_queue, &pkt, 1) >= 0)
|
|
av_packet_free(&pkt);
|
|
av_fifo_freep2(&ms->muxing_queue);
|
|
}
|
|
av_freep(&mux->streams);
|
|
av_dict_free(&mux->opts);
|
|
|
|
av_packet_free(&mux->sq_pkt);
|
|
|
|
fc_close(&mux->fc);
|
|
|
|
av_freep(pmux);
|
|
}
|
|
|
|
void of_close(OutputFile **pof)
|
|
{
|
|
OutputFile *of = *pof;
|
|
|
|
if (!of)
|
|
return;
|
|
|
|
thread_stop(of);
|
|
|
|
sq_free(&of->sq_encode);
|
|
sq_free(&of->sq_mux);
|
|
|
|
mux_free(&of->mux);
|
|
|
|
av_freep(pof);
|
|
}
|
|
|
|
int of_muxer_init(OutputFile *of, AVFormatContext *fc,
|
|
AVDictionary *opts, int64_t limit_filesize,
|
|
int thread_queue_size)
|
|
{
|
|
Muxer *mux = av_mallocz(sizeof(*mux));
|
|
int ret = 0;
|
|
|
|
if (!mux) {
|
|
fc_close(&fc);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
mux->streams = av_calloc(fc->nb_streams, sizeof(*mux->streams));
|
|
if (!mux->streams) {
|
|
fc_close(&fc);
|
|
av_freep(&mux);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
of->mux = mux;
|
|
mux->fc = fc;
|
|
|
|
for (int i = 0; i < fc->nb_streams; i++) {
|
|
MuxStream *ms = &mux->streams[i];
|
|
ms->muxing_queue = av_fifo_alloc2(8, sizeof(AVPacket*), 0);
|
|
if (!ms->muxing_queue) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
ms->last_mux_dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
mux->thread_queue_size = thread_queue_size > 0 ? thread_queue_size : 8;
|
|
mux->limit_filesize = limit_filesize;
|
|
mux->opts = opts;
|
|
|
|
if (strcmp(of->format->name, "rtp"))
|
|
want_sdp = 0;
|
|
|
|
if (of->sq_mux) {
|
|
mux->sq_pkt = av_packet_alloc();
|
|
if (!mux->sq_pkt) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* write the header for files with no streams */
|
|
if (of->format->flags & AVFMT_NOSTREAMS && fc->nb_streams == 0) {
|
|
ret = of_check_init(of);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
if (ret < 0)
|
|
mux_free(&of->mux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int64_t of_filesize(OutputFile *of)
|
|
{
|
|
return atomic_load(&of->mux->last_filesize);
|
|
}
|
|
|
|
AVChapter * const *
|
|
of_get_chapters(OutputFile *of, unsigned int *nb_chapters)
|
|
{
|
|
*nb_chapters = of->mux->fc->nb_chapters;
|
|
return of->mux->fc->chapters;
|
|
}
|