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/*
* audio interleaving prototypes and declarations
*
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* 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 AVFORMAT_AUDIOINTERLEAVE_H
#define AVFORMAT_AUDIOINTERLEAVE_H

#include "libavutil/fifo.h"
#include "avformat.h"

typedef struct {
    AVFifoBuffer *fifo;
    unsigned fifo_size; ///< size of currently allocated FIFO
    uint64_t dts; ///< current dts
    int sample_size; ///< size of one sample all channels included
    const int *samples_per_frame; ///< must be 0-terminated
    const int *samples; ///< current samples per frame, pointer to samples_per_frame
    AVRational time_base; ///< time base of output audio packets
} AudioInterleaveContext;

int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base);
void ff_audio_interleave_close(AVFormatContext *s);

/**
* Rechunk audio PCM packets per AudioInterleaveContext->samples_per_frame
* and interleave them correctly.
* The first element of AVStream->priv_data must be AudioInterleaveContext
* when using this function.
*
* @param get_packet function will output a packet when streams are correctly interleaved.
* @param compare_ts function will compare AVPackets and decide interleaving order.
*/
int ff_audio_rechunk_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush,
                        int (*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int),
                        int (*compare_ts)(AVFormatContext *, AVPacket *, AVPacket *));

#endif /* AVFORMAT_AUDIOINTERLEAVE_H */
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