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Working on thru.

This commit is contained in:
Francois Best 2013-07-07 14:13:32 +02:00
parent 8c9d289216
commit d78cace1b2
3 changed files with 146 additions and 126 deletions
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4
src/MIDI.h
View File

@ -117,7 +117,8 @@ public:
inline void setInputChannel(Channel inChannel);
public:
static inline MidiType getTypeFromStatusByte(byte inStatus);
static inline MidiType getTypeFromStatusByte(StatusByte inStatus);
static inline byte getMessageLength(StatusByte inStatus);
static inline bool isChannelMessage(MidiType inType);
static inline bool isRealtimeMessage(MidiType inType);
@ -210,7 +211,6 @@ private:
private:
ThruFlags mThruFlags;
bool mForwardCurrentMessage;
#endif // MIDI_BUILD_THRU

145
src/MIDI.hpp
View File

@ -485,7 +485,7 @@ bool MidiInterface<SerialPort>::parse()
// - Look for other bytes in buffer, call parser recursively,
// until the message is assembled or the buffer is empty.
// Else, add the extracted byte to the pending message, and check validity.
// When the message is done, store it.
// When the message is recomposed, notify the caller.
const byte extracted = mSerial.read();
@ -530,17 +530,16 @@ bool MidiInterface<SerialPort>::parse()
}
}
switch (getTypeFromStatusByte(mPendingMessage[0]))
mPendingMessageExpectedLenght = getMessageLength(mPendingMessage[0]);
if (mPendingMessageExpectedLenght == 1)
{
// 1 byte messages
case Start:
case Continue:
case Stop:
case Clock:
case ActiveSensing:
case SystemReset:
case TuneRequest:
// Handle the message type directly here.
// RealTime and 1 byte messages -> send & handle rightaway
if (shouldMessageBeForwarded(mPendingMessage[0]))
{
mSerial.write(mPendingMessage[0]);
}
mMessage.type = getTypeFromStatusByte(mPendingMessage[0]);
mMessage.channel = 0;
mMessage.data1 = 0;
@ -556,45 +555,32 @@ bool MidiInterface<SerialPort>::parse()
mPendingMessageExpectedLenght = 0;
return true;
break;
// 2 bytes messages
case ProgramChange:
case AfterTouchChannel:
case TimeCodeQuarterFrame:
case SongSelect:
mPendingMessageExpectedLenght = 2;
break;
// 3 bytes messages
case NoteOn:
case NoteOff:
case ControlChange:
case PitchBend:
case AfterTouchPoly:
case SongPosition:
mPendingMessageExpectedLenght = 3;
break;
case SystemExclusive:
// The message can be any lenght
}
else if (mPendingMessageExpectedLenght == 0xff)
{
// SysEx: The message can be any length
// between 3 and MIDI_SYSEX_ARRAY_SIZE bytes
mPendingMessageExpectedLenght = MIDI_SYSEX_ARRAY_SIZE;
mRunningStatus_RX = InvalidType;
mMessage.sysexArray[0] = SystemExclusive;
break;
case InvalidType:
default:
// This is obviously wrong. Let's get the hell out'a here.
}
else if (mPendingMessageExpectedLenght == 0)
{
// Parse error
resetInput();
return false;
break;
}
// Then update the index of the pending message.
mPendingMessageIndex++;
if (shouldMessageBeForwarded(mPendingMessage[0]))
{
mSerial.write(mPendingMessage[0]);
}
#if USE_1BYTE_PARSING
// Message is not complete.
return false;
@ -603,7 +589,6 @@ bool MidiInterface<SerialPort>::parse()
// to parse the rest of the message.
return parse();
#endif
}
else
{
@ -612,14 +597,12 @@ bool MidiInterface<SerialPort>::parse()
{
// Reception of status bytes in the middle of an uncompleted message
// are allowed only for interleaved Real Time message or EOX
switch (extracted)
if (isRealtimeMessage(extracted))
{
case Clock:
case Start:
case Continue:
case Stop:
case ActiveSensing:
case SystemReset:
if (shouldMessageBeForwarded(extracted)
{
mSerial.write(extracted);
}
// Here we will have to extract the one-byte message,
// pass it to the structure for being read outside
@ -634,13 +617,16 @@ bool MidiInterface<SerialPort>::parse()
mMessage.channel = 0;
mMessage.valid = true;
return true;
break;
// End of Exclusive
case 0xF7:
}
else if (extracted == 0xF7)
{
if (mMessage.sysexArray[0] == SystemExclusive)
{
if (shouldMessageBeForwarded(SystemExclusive)
{
mSerial.write(extracted);
}
// Store the last byte (EOX)
mMessage.sysexArray[mPendingMessageIndex++] = 0xF7;
@ -655,24 +641,27 @@ bool MidiInterface<SerialPort>::parse()
resetInput();
return true;
}
}
else
{
// Well well well.. error.
resetInput();
return false;
}
break;
default:
break;
// Parse error: unexpected status byte
}
}
// Add extracted data byte to pending message
if (mPendingMessage[0] == SystemExclusive)
{
mMessage.sysexArray[mPendingMessageIndex] = extracted;
}
else
{
mPendingMessage[mPendingMessageIndex] = extracted;
}
if (shouldMessageBeForwarded(mPendingMessage[0])
{
mSerial.write(extracted);
}
// Now we are going to check if we have reached the end of the message
if (mPendingMessageIndex >= (mPendingMessageExpectedLenght - 1))
@ -823,7 +812,7 @@ const byte* MidiInterface<SerialPort>::getSysExArray() const
return mMessage.sysexArray;
}
/*! \brief Get the lenght of the System Exclusive array.
/*! \brief Get the length of the System Exclusive array.
It is coded using data1 as LSB and data2 as MSB.
\return The array's length, in bytes.
@ -868,7 +857,7 @@ void MidiInterface<SerialPort>::setInputChannel(Channel inChannel)
made public so you can handle MidiTypes more easily.
*/
template<class SerialPort>
MidiType MidiInterface<SerialPort>::getTypeFromStatusByte(byte inStatus)
MidiType MidiInterface<SerialPort>::getTypeFromStatusByte(StatusByte inStatus)
{
if ((inStatus < 0x80) ||
(inStatus == 0xF4) ||
@ -879,6 +868,38 @@ MidiType MidiInterface<SerialPort>::getTypeFromStatusByte(byte inStatus)
else return (MidiType)inStatus;
}
template<class SerialPort>
byte MidiInterface<SerialPort>::getMessageLength(StatusByte inStatus)
{
const MidiType type = getTypeFromStatusByte(inStatus);
if (isRealtimeMessage(type) || type == TuneRequest)
{
return 1;
}
else if (type == NoteOn ||
type == NoteOff ||
type == ControlChange ||
type == PitchBend ||
type == AfterTouchPoly ||
type == SongPosition)
{
return 3;
}
else if (type == ProgramChange ||
type == AfterTouchChannel ||
type == TimeCodeQuarterFrame ||
type == SongSelect)
{
return 2;
}
else if (type == SystemExclusive)
{
return 0xff; // SysEx messages can have variable length
}
return 0; // Unknown message type
}
template<class SerialPort>
bool MidiInterface<SerialPort>::isChannelMessage(MidiType inType)
{
@ -1088,7 +1109,7 @@ bool MidiInterface<SerialPort>::shouldMessageBeForwarded(StatusByte inStatus) co
else
{
// Unknown message or junk
return false;
return hasThruFlag(ThruFilterFlags::junk);
}
}

29
src/midi_Defs.h
View File

@ -61,27 +61,26 @@ enum MidiType
// -----------------------------------------------------------------------------
/*! Enumeration of Thru filter modes */
enum MidiFilterMode
{
Off = 0, ///< Thru disabled (nothing passes through).
Full = 1, ///< Fully enabled Thru (every incoming message is sent back).
SameChannel = 2, ///< Only the messages on the Input Channel will be sent back.
DifferentChannel = 3, ///< All the messages but the ones on the Input Channel will be sent back.
};
/*! Enumeration of Thru filter modes
@see setThruFilterMode
*/
struct ThruFilterFlags
{
enum
{
off = 0
off = 0 ///< Thru disabled (nothing passes through).
, channelSame = 1
, channelDifferent = 2
, channelSame = (1 << 0) ///< Only the messages on the Input Channel will be sent back.
, channelDifferent = (1 << 1) ///< All the messages but the ones on the Input Channel will be sent back.
, channel = channelSame | channelDifferent
, system = 4
, realtime = 8
, all = channel | system | realtime
, systemExclusive = (1 << 2)
, systemCommon = (1 << 3)
, systemRealtime = (1 << 4)
, system = systemExclusive | systemCommon | systemRealtime
, junk = (1 << 7) ///< Send mis-formated data back (unadvisable)
/// Fully enabled Thru (every incoming message is sent back).
, all = channel | system
};
};