midi_UsbTransport.h

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#pragma once

#include "midi_Defs.h"
#include "midi_RingBuffer.h"
#include <MIDIUSB.h>

BEGIN_MIDI_NAMESPACE

template<unsigned BuffersSize>
class UsbTransport
{
public:
    inline UsbTransport();
    inline ~UsbTransport();

public: // Serial / Stream API required for template compatibility
    inline void begin(unsigned inBaudrate);
    inline unsigned available();
    inline byte read();
    inline void write(byte inData);

private:
    inline bool pollUsbMidi();
    inline void recomposeAndSendTxPackets();
    inline void resetTx();
    static inline byte encodePacketHeader(StatusByte inStatusByte);
    static inline int getPacketLength(const midiEventPacket_t& inPacket);

private:
    typedef RingBuffer<byte, BuffersSize> Buffer;
    Buffer mTxBuffer;
    Buffer mRxBuffer;

    union TxPacket
    {
        byte mDataArray[4];
        midiEventPacket_t mPacket;
    };
    TxPacket mCurrentTxPacket;
    int mCurrentTxPacketByteIndex;
};

END_MIDI_NAMESPACE

#include "midi_UsbTransport.hpp"