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fix: Use USB packet interface in the transport layer

This commit is contained in:
Francois Best 2018-11-04 14:17:07 +01:00
parent 5ccf0159a2
commit 67a13be6c6
2 changed files with 13 additions and 101 deletions
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14
src/midi_UsbTransport.h
View File

@ -29,6 +29,7 @@
#include "midi_Defs.h" #include "midi_Defs.h"
#include "midi_RingBuffer.h" #include "midi_RingBuffer.h"
#include "midi_UsbPacketInterface.h"
#include <MIDIUSB.h> #include <MIDIUSB.h>
BEGIN_MIDI_NAMESPACE BEGIN_MIDI_NAMESPACE
@ -47,24 +48,13 @@ public: // Serial / Stream API required for template compatibility
inline void write(byte inData); inline void write(byte inData);
private: private:
inline bool pollUsbMidi(); inline void pollUsbMidi();
inline void recomposeAndSendTxPackets(); inline void recomposeAndSendTxPackets();
inline void resetTx();
static inline byte encodePacketHeader(StatusByte inStatusByte);
static inline int getPacketLength(const midiEventPacket_t& inPacket);
private: private:
typedef RingBuffer<byte, BuffersSize> Buffer; typedef RingBuffer<byte, BuffersSize> Buffer;
Buffer mTxBuffer; Buffer mTxBuffer;
Buffer mRxBuffer; Buffer mRxBuffer;
union TxPacket
{
byte mDataArray[4];
midiEventPacket_t mPacket;
};
TxPacket mCurrentTxPacket;
int mCurrentTxPacketByteIndex;
}; };
END_MIDI_NAMESPACE END_MIDI_NAMESPACE

98
src/midi_UsbTransport.hpp
View File

@ -73,108 +73,30 @@ inline void UsbTransport<BufferSize>::write(byte inData)
// ----------------------------------------------------------------------------- // -----------------------------------------------------------------------------
template<unsigned BufferSize> template<unsigned BufferSize>
inline bool UsbTransport<BufferSize>::pollUsbMidi() inline void UsbTransport<BufferSize>::pollUsbMidi()
{ {
bool received = false;
midiEventPacket_t packet = MidiUSB.read(); midiEventPacket_t packet = MidiUSB.read();
while (packet.header != 0) while (packet.header != 0)
{ {
received = true; serialiseRxPacket(packet, mRxBuffer);
switch (packet.header << 4)
{
// 3 bytes messages
case midi::NoteOff:
case midi::NoteOn:
case midi::AfterTouchPoly:
case midi::ControlChange:
case midi::PitchBend:
mRxBuffer.write(packet.byte1);
mRxBuffer.write(packet.byte2);
mRxBuffer.write(packet.byte3);
break;
// 2 bytes messages
case midi::ProgramChange:
case midi::AfterTouchChannel:
mRxBuffer.write(packet.byte1);
mRxBuffer.write(packet.byte2);
break;
// 1 byte message
case midi::TuneRequest:
case midi::Clock:
case midi::Start:
case midi::Continue:
case midi::Stop:
case midi::ActiveSensing:
case midi::SystemReset:
mRxBuffer.write(packet.byte1);
break;
// Special cases
// case midi::SystemExclusive:
// case midi::TimeCodeQuarterFrame:
// case midi::SongPosition:
// case midi::SongSelect:
// break;
default:
break;
}
packet = MidiUSB.read(); packet = MidiUSB.read();
} }
return received;
} }
template<unsigned BufferSize> template<unsigned BufferSize>
inline void UsbTransport<BufferSize>::recomposeAndSendTxPackets() inline void UsbTransport<BufferSize>::recomposeAndSendTxPackets()
{ {
while (!mTxBuffer.isEmpty()) midiEventPacket_t packet;
bool sent = false;
while (composeTxPacket(mTxBuffer, packet))
{ {
const byte data = mTxBuffer.read(); MidiUSB.sendMIDI(packet);
if (mCurrentTxPacketByteIndex == 0) sent = true;
}
if (sent)
{ {
mCurrentTxPacket.mPacket.header = encodePacketHeader(data); MidiUSB.flush();
} }
else
{
mCurrentTxPacket.mDataArray[mCurrentTxPacketByteIndex] = data;
}
mCurrentTxPacketByteIndex++;
const int packetLength = getPacketLength(mCurrentTxPacket.mPacket);
if (mCurrentTxPacketByteIndex == packetLength)
{
MidiUSB.write(mCurrentTxPacket.mDataArray, packetLength);
resetTx();
}
}
}
template<unsigned BufferSize>
inline void UsbTransport<BufferSize>::resetTx()
{
mCurrentTxPacket.mPacket.header = 0;
mCurrentTxPacket.mPacket.byte1 = 0;
mCurrentTxPacket.mPacket.byte2 = 0;
mCurrentTxPacket.mPacket.byte3 = 0;
mCurrentTxPacketByteIndex = 0;
}
template<unsigned BufferSize>
inline byte UsbTransport<BufferSize>::encodePacketHeader(StatusByte inStatusByte)
{
// todo: fix me for other types than channel
return inStatusByte >> 4;
}
template<unsigned BufferSize>
inline int UsbTransport<BufferSize>::getPacketLength(const midiEventPacket_t& inPacket)
{
return 3;
} }
END_MIDI_NAMESPACE END_MIDI_NAMESPACE