/******************************************************************************\
 * Copyright (c) 2020
 *
 * Author(s):
 *  pljones
 *
 ******************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 *
\******************************************************************************/

#pragma once

#include <QDataStream>

namespace recorder
{

inline QString secondsAt48K ( const qint64 frames, const int frameSize )
{
    return QString::number ( static_cast<double> ( frames * frameSize ) / 48000, 'f', 14 );
}

struct STrackItem
{
    STrackItem ( int numAudioChannels, qint64 startFrame, qint64 frameCount, QString fileName ) :
        numAudioChannels ( numAudioChannels ),
        startFrame ( startFrame ),
        frameCount ( frameCount ),
        fileName ( fileName )
    {}

    int     numAudioChannels;
    qint64  startFrame;
    qint64  frameCount;
    QString fileName;
};

class HdrRiff
{
public:
    HdrRiff() {}

    static const uint32_t chunkId   = 0x46464952; // RIFF
    static const uint32_t chunkSize = 0x00000000; // unknown
    static const uint32_t format    = 0x45564157; // WAVE
};

class FmtSubChunk
{
public:
    FmtSubChunk ( const uint16_t _numChannels ) :
        numChannels ( _numChannels ),
        byteRate ( sampleRate * numChannels * bitsPerSample / 8 ),
        blockAlign ( numChannels * bitsPerSample / 8 )
    {}
    static const uint32_t chunkId     = 0x20746d66; // "fmt "
    static const uint32_t chunkSize   = 16;         // bytes in fmtSubChunk after chunkSize
    static const uint16_t audioFormat = 1;          // PCM
    const uint16_t        numChannels;              // 1 for mono, 2 for joy... uh, stereo
    static const uint32_t sampleRate = 48000;       // because it's Jamulus
    const uint32_t        byteRate;                 // sampleRate * numChannels * bitsPerSample/8
    const uint16_t        blockAlign;               // numChannels * bitsPerSample/8
    static const uint16_t bitsPerSample = 16;
};

class DataSubChunkHdr
{
public:
    DataSubChunkHdr() {}

    static const uint32_t chunkId   = 0x61746164; // "data"
    static const uint32_t chunkSize = 0x7ffff000; // magic for unspecified length
};

class CWaveStream : public QDataStream
{
public:
    CWaveStream ( const uint16_t numChannels );
    explicit CWaveStream ( QIODevice* iod, const uint16_t numChannels );
    CWaveStream ( QByteArray* iod, QIODevice::OpenMode flags, const uint16_t numChannels );
    CWaveStream ( const QByteArray& ba, const uint16_t numChannels );

    void finalise();

private:
    void waveStreamHeaders();

    const uint16_t  numChannels;
    const int64_t   initialPos;
    const ByteOrder initialByteOrder;
};

} // namespace recorder

recorder::CWaveStream& operator<< ( recorder::CWaveStream& out, recorder::HdrRiff& hdrRiff );
recorder::CWaveStream& operator<< ( recorder::CWaveStream& out, recorder::FmtSubChunk& fmtSubChunk );
recorder::CWaveStream& operator<< ( recorder::CWaveStream& out, recorder::DataSubChunkHdr& dataSubChunkHdr );
