ffmpeg_mux.h

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/*
 * Muxer internal APIs - should not be included outside of ffmpeg_mux*
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
#ifndef FFTOOLS_FFMPEG_MUX_H
#define FFTOOLS_FFMPEG_MUX_H
 
#include <stdatomic.h>
#include <stdint.h>
 
#include "thread_queue.h"
 
#include "libavformat/avformat.h"
 
#include "libavcodec/packet.h"
 
#include "libavutil/dict.h"
#include "libavutil/fifo.h"
#include "libavutil/thread.h"
 
typedef struct MuxStream {
    OutputStream ost;
 
    // name used for logging
    char log_name[32];
 
    /* the packets are buffered here until the muxer is ready to be initialized */
    AVFifo *muxing_queue;
 
    AVBSFContext *bsf_ctx;
    AVPacket     *bsf_pkt;
 
    AVPacket     *pkt;
 
    EncStats stats;
 
    int64_t max_frames;
 
    /*
     * The size of the AVPackets' buffers in queue.
     * Updated when a packet is either pushed or pulled from the queue.
     */
    size_t muxing_queue_data_size;
 
    int max_muxing_queue_size;
 
    /* Threshold after which max_muxing_queue_size will be in effect */
    size_t muxing_queue_data_threshold;
 
    // timestamp from which the streamcopied streams should start,
    // in AV_TIME_BASE_Q;
    // everything before it should be discarded
    int64_t ts_copy_start;
 
    /* dts of the last packet sent to the muxer, in the stream timebase
     * used for making up missing dts values */
    int64_t last_mux_dts;
 
    int64_t    stream_duration;
    AVRational stream_duration_tb;
 
    // state for av_rescale_delta() call for audio in write_packet()
    int64_t ts_rescale_delta_last;
 
    // combined size of all the packets sent to the muxer
    uint64_t data_size_mux;
 
    int copy_initial_nonkeyframes;
    int copy_prior_start;
    int streamcopy_started;
} MuxStream;
 
typedef struct Muxer {
    OutputFile of;
 
    // name used for logging
    char log_name[32];
 
    AVFormatContext *fc;
 
    pthread_t    thread;
    ThreadQueue *tq;
 
    AVDictionary *opts;
 
    int thread_queue_size;
 
    /* filesize limit expressed in bytes */
    int64_t limit_filesize;
    atomic_int_least64_t last_filesize;
    int header_written;
 
    SyncQueue *sq_mux;
    AVPacket *sq_pkt;
} Muxer;
 
/* whether we want to print an SDP, set in of_open() */
extern int want_sdp;
 
int mux_check_init(Muxer *mux);
 
static MuxStream *ms_from_ost(OutputStream *ost)
{
    return (MuxStream*)ost;
}
 
#endif /* FFTOOLS_FFMPEG_MUX_H */