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MIDI.hpp
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MIDI.hpp
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/*!
* @file MIDI.hpp
* Project Arduino MIDI Library
* @brief MIDI Library for the Arduino - Inline implementations
* @author Francois Best, lathoub
* @date 24/02/11
* @license MIT - Copyright (c) 2015 Francois Best
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#pragma once
BEGIN_MIDI_NAMESPACE
/// \brief Constructor for MidiInterface.
template<class Transport, class Settings, class Platform>
inline MidiInterface<Transport, Settings, Platform>::MidiInterface(Transport& inTransport)
: mTransport(inTransport)
, mInputChannel(0)
, mRunningStatus_RX(InvalidType)
, mRunningStatus_TX(InvalidType)
, mPendingMessageExpectedLength(0)
, mPendingMessageIndex(0)
, mCurrentRpnNumber(0xffff)
, mCurrentNrpnNumber(0xffff)
, mThruActivated(true)
, mThruFilterMode(Thru::Full)
, mLastMessageSentTime(0)
, mLastMessageReceivedTime(0)
, mSenderActiveSensingPeriodicity(0)
, mReceiverActiveSensingActivated(false)
, mLastError(0)
{
mSenderActiveSensingPeriodicity = Settings::SenderActiveSensingPeriodicity;
}
/*! \brief Destructor for MidiInterface.
This is not really useful for the Arduino, as it is never called...
*/
template<class Transport, class Settings, class Platform>
inline MidiInterface<Transport, Settings, Platform>::~MidiInterface()
{
}
// -----------------------------------------------------------------------------
/*! \brief Call the begin method in the setup() function of the Arduino.
All parameters are set to their default values:
- Input channel set to 1 if no value is specified
- Full thru mirroring
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::begin(Channel inChannel)
{
// Initialise the Transport layer
mTransport.begin();
mInputChannel = inChannel;
mRunningStatus_TX = InvalidType;
mRunningStatus_RX = InvalidType;
mPendingMessageIndex = 0;
mPendingMessageExpectedLength = 0;
mCurrentRpnNumber = 0xffff;
mCurrentNrpnNumber = 0xffff;
mLastMessageSentTime = Platform::now();
mMessage.valid = false;
mMessage.type = InvalidType;
mMessage.channel = 0;
mMessage.data1 = 0;
mMessage.data2 = 0;
mMessage.length = 0;
mThruFilterMode = Thru::Full;
mThruActivated = mTransport.thruActivated;
}
// -----------------------------------------------------------------------------
// Output
// -----------------------------------------------------------------------------
/*! \addtogroup output
@{
*/
/*! \brief Send a MIDI message.
\param inMessage The message
This method is used when you want to send a Message that has not been constructed
by the library, but by an external source.
This method does *not* check against any of the constraints.
Typically this function is use by MIDI Bridges taking MIDI messages and passing
them thru.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::send(const MidiMessage& inMessage)
{
if (!inMessage.valid)
return;
if (mTransport.beginTransmission(inMessage.type))
{
const StatusByte status = getStatus(inMessage.type, inMessage.channel);
mTransport.write(status);
if (inMessage.type != MidiType::SystemExclusive)
{
if (inMessage.length > 1) mTransport.write(inMessage.data1);
if (inMessage.length > 2) mTransport.write(inMessage.data2);
} else
{
// sysexArray does not contain the start and end tags
mTransport.write(MidiType::SystemExclusiveStart);
for (size_t i = 0; i < inMessage.getSysExSize(); i++)
mTransport.write(inMessage.sysexArray[i]);
mTransport.write(MidiType::SystemExclusiveEnd);
}
}
mTransport.endTransmission();
updateLastSentTime();
}
/*! \brief Generate and send a MIDI message from the values given.
\param inType The message type (see type defines for reference)
\param inData1 The first data byte.
\param inData2 The second data byte (if the message contains only 1 data byte,
set this one to 0).
\param inChannel The output channel on which the message will be sent
(values from 1 to 16). Note: you cannot send to OMNI.
This is an internal method, use it only if you need to send raw data
from your code, at your own risks.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::send(MidiType inType,
DataByte inData1,
DataByte inData2,
Channel inChannel)
{
if (inType <= PitchBend) // Channel messages
{
// Then test if channel is valid
if (inChannel >= MIDI_CHANNEL_OFF ||
inChannel == MIDI_CHANNEL_OMNI ||
inType < 0x80)
{
return; // Don't send anything
}
// Protection: remove MSBs on data
inData1 &= 0x7f;
inData2 &= 0x7f;
const StatusByte status = getStatus(inType, inChannel);
if (mTransport.beginTransmission(inType))
{
if (Settings::UseRunningStatus)
{
if (mRunningStatus_TX != status)
{
// New message, memorise and send header
mRunningStatus_TX = status;
mTransport.write(mRunningStatus_TX);
}
}
else
{
// Don't care about running status, send the status byte.
mTransport.write(status);
}
// Then send data
mTransport.write(inData1);
if (inType != ProgramChange && inType != AfterTouchChannel)
{
mTransport.write(inData2);
}
mTransport.endTransmission();
updateLastSentTime();
}
}
else if (inType >= Clock && inType <= SystemReset)
{
sendRealTime(inType); // System Real-time and 1 byte.
}
}
// -----------------------------------------------------------------------------
/*! \brief Send a Note On message
\param inNoteNumber Pitch value in the MIDI format (0 to 127).
\param inVelocity Note attack velocity (0 to 127). A NoteOn with 0 velocity
is considered as a NoteOff.
\param inChannel The channel on which the message will be sent (1 to 16).
Take a look at the values, names and frequencies of notes here:
http://www.phys.unsw.edu.au/jw/notes.html
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendNoteOn(DataByte inNoteNumber,
DataByte inVelocity,
Channel inChannel)
{
send(NoteOn, inNoteNumber, inVelocity, inChannel);
}
/*! \brief Send a Note Off message
\param inNoteNumber Pitch value in the MIDI format (0 to 127).
\param inVelocity Release velocity (0 to 127).
\param inChannel The channel on which the message will be sent (1 to 16).
Note: you can send NoteOn with zero velocity to make a NoteOff, this is based
on the Running Status principle, to avoid sending status messages and thus
sending only NoteOn data. sendNoteOff will always send a real NoteOff message.
Take a look at the values, names and frequencies of notes here:
http://www.phys.unsw.edu.au/jw/notes.html
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendNoteOff(DataByte inNoteNumber,
DataByte inVelocity,
Channel inChannel)
{
send(NoteOff, inNoteNumber, inVelocity, inChannel);
}
/*! \brief Send a Program Change message
\param inProgramNumber The Program to select (0 to 127).
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendProgramChange(DataByte inProgramNumber,
Channel inChannel)
{
send(ProgramChange, inProgramNumber, 0, inChannel);
}
/*! \brief Send a Control Change message
\param inControlNumber The controller number (0 to 127).
\param inControlValue The value for the specified controller (0 to 127).
\param inChannel The channel on which the message will be sent (1 to 16).
@see MidiControlChangeNumber
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendControlChange(DataByte inControlNumber,
DataByte inControlValue,
Channel inChannel)
{
send(ControlChange, inControlNumber, inControlValue, inChannel);
}
/*! \brief Send a Polyphonic AfterTouch message (applies to a specified note)
\param inNoteNumber The note to apply AfterTouch to (0 to 127).
\param inPressure The amount of AfterTouch to apply (0 to 127).
\param inChannel The channel on which the message will be sent (1 to 16).
Note: this method is deprecated and will be removed in a future revision of the
library, @see sendAfterTouch to send polyphonic and monophonic AfterTouch messages.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendPolyPressure(DataByte inNoteNumber,
DataByte inPressure,
Channel inChannel)
{
send(AfterTouchPoly, inNoteNumber, inPressure, inChannel);
}
/*! \brief Send a MonoPhonic AfterTouch message (applies to all notes)
\param inPressure The amount of AfterTouch to apply to all notes.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendAfterTouch(DataByte inPressure,
Channel inChannel)
{
send(AfterTouchChannel, inPressure, 0, inChannel);
}
/*! \brief Send a Polyphonic AfterTouch message (applies to a specified note)
\param inNoteNumber The note to apply AfterTouch to (0 to 127).
\param inPressure The amount of AfterTouch to apply (0 to 127).
\param inChannel The channel on which the message will be sent (1 to 16).
@see Replaces sendPolyPressure (which is now deprecated).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendAfterTouch(DataByte inNoteNumber,
DataByte inPressure,
Channel inChannel)
{
send(AfterTouchPoly, inNoteNumber, inPressure, inChannel);
}
/*! \brief Send a Pitch Bend message using a signed integer value.
\param inPitchValue The amount of bend to send (in a signed integer format),
between MIDI_PITCHBEND_MIN and MIDI_PITCHBEND_MAX,
center value is 0.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendPitchBend(int inPitchValue,
Channel inChannel)
{
const unsigned bend = unsigned(inPitchValue - int(MIDI_PITCHBEND_MIN));
send(PitchBend, (bend & 0x7f), (bend >> 7) & 0x7f, inChannel);
}
/*! \brief Send a Pitch Bend message using a floating point value.
\param inPitchValue The amount of bend to send (in a floating point format),
between -1.0f (maximum downwards bend)
and +1.0f (max upwards bend), center value is 0.0f.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendPitchBend(double inPitchValue,
Channel inChannel)
{
const int scale = inPitchValue > 0.0 ? MIDI_PITCHBEND_MAX : - MIDI_PITCHBEND_MIN;
const int value = int(inPitchValue * double(scale));
sendPitchBend(value, inChannel);
}
/*! \brief Generate and send a System Exclusive frame.
\param inLength The size of the array to send
\param inArray The byte array containing the data to send
\param inArrayContainsBoundaries When set to 'true', 0xf0 & 0xf7 bytes
(start & stop SysEx) will NOT be sent
(and therefore must be included in the array).
default value for ArrayContainsBoundaries is set to 'false' for compatibility
with previous versions of the library.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendSysEx(unsigned inLength,
const byte* inArray,
bool inArrayContainsBoundaries)
{
const bool writeBeginEndBytes = !inArrayContainsBoundaries;
if (mTransport.beginTransmission(MidiType::SystemExclusiveStart))
{
if (writeBeginEndBytes)
mTransport.write(MidiType::SystemExclusiveStart);
for (unsigned i = 0; i < inLength; ++i)
mTransport.write(inArray[i]);
if (writeBeginEndBytes)
mTransport.write(MidiType::SystemExclusiveEnd);
mTransport.endTransmission();
updateLastSentTime();
}
if (Settings::UseRunningStatus)
mRunningStatus_TX = InvalidType;
}
/*! \brief Send a Tune Request message.
When a MIDI unit receives this message,
it should tune its oscillators (if equipped with any).
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendTuneRequest()
{
sendCommon(TuneRequest);
}
/*! \brief Send a MIDI Time Code Quarter Frame.
\param inTypeNibble MTC type
\param inValuesNibble MTC data
See MIDI Specification for more information.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendTimeCodeQuarterFrame(DataByte inTypeNibble,
DataByte inValuesNibble)
{
const byte data = byte((((inTypeNibble & 0x07) << 4) | (inValuesNibble & 0x0f)));
sendTimeCodeQuarterFrame(data);
}
/*! \brief Send a MIDI Time Code Quarter Frame.
See MIDI Specification for more information.
\param inData if you want to encode directly the nibbles in your program,
you can send the byte here.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendTimeCodeQuarterFrame(DataByte inData)
{
sendCommon(TimeCodeQuarterFrame, inData);
}
/*! \brief Send a Song Position Pointer message.
\param inBeats The number of beats since the start of the song.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendSongPosition(unsigned inBeats)
{
sendCommon(SongPosition, inBeats);
}
/*! \brief Send a Song Select message */
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendSongSelect(DataByte inSongNumber)
{
sendCommon(SongSelect, inSongNumber);
}
/*! \brief Send a Common message. Common messages reset the running status.
\param inType The available Common types are:
TimeCodeQuarterFrame, SongPosition, SongSelect and TuneRequest.
@see MidiType
\param inData1 The byte that goes with the common message.
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendCommon(MidiType inType, unsigned inData1)
{
switch (inType)
{
case TimeCodeQuarterFrame:
case SongPosition:
case SongSelect:
case TuneRequest:
break;
default:
// Invalid Common marker
return;
}
if (mTransport.beginTransmission(inType))
{
mTransport.write((byte)inType);
switch (inType)
{
case TimeCodeQuarterFrame:
mTransport.write(inData1);
break;
case SongPosition:
mTransport.write(inData1 & 0x7f);
mTransport.write((inData1 >> 7) & 0x7f);
break;
case SongSelect:
mTransport.write(inData1 & 0x7f);
break;
case TuneRequest:
break;
default:
break; // LCOV_EXCL_LINE - Coverage blind spot
}
mTransport.endTransmission();
updateLastSentTime();
}
if (Settings::UseRunningStatus)
mRunningStatus_TX = InvalidType;
}
/*! \brief Send a Real Time (one byte) message.
\param inType The available Real Time types are:
Start, Stop, Continue, Clock, ActiveSensing and SystemReset.
@see MidiType
*/
template<class Transport, class Settings, class Platform>
void MidiInterface<Transport, Settings, Platform>::sendRealTime(MidiType inType)
{
// Do not invalidate Running Status for real-time messages
// as they can be interleaved within any message.
switch (inType)
{
case Clock:
case Start:
case Stop:
case Continue:
case ActiveSensing:
case SystemReset:
if (mTransport.beginTransmission(inType))
{
mTransport.write((byte)inType);
mTransport.endTransmission();
updateLastSentTime();
}
break;
default:
// Invalid Real Time marker
break;
}
}
/*! \brief Start a Registered Parameter Number frame.
\param inNumber The 14-bit number of the RPN you want to select.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::beginRpn(unsigned inNumber,
Channel inChannel)
{
if (mCurrentRpnNumber != inNumber)
{
const byte numMsb = 0x7f & (inNumber >> 7);
const byte numLsb = 0x7f & inNumber;
sendControlChange(RPNLSB, numLsb, inChannel);
sendControlChange(RPNMSB, numMsb, inChannel);
mCurrentRpnNumber = inNumber;
}
}
/*! \brief Send a 14-bit value for the currently selected RPN number.
\param inValue The 14-bit value of the selected RPN.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendRpnValue(unsigned inValue,
Channel inChannel)
{;
const byte valMsb = 0x7f & (inValue >> 7);
const byte valLsb = 0x7f & inValue;
sendControlChange(DataEntryMSB, valMsb, inChannel);
sendControlChange(DataEntryLSB, valLsb, inChannel);
}
/*! \brief Send separate MSB/LSB values for the currently selected RPN number.
\param inMsb The MSB part of the value to send. Meaning depends on RPN number.
\param inLsb The LSB part of the value to send. Meaning depends on RPN number.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendRpnValue(byte inMsb,
byte inLsb,
Channel inChannel)
{
sendControlChange(DataEntryMSB, inMsb, inChannel);
sendControlChange(DataEntryLSB, inLsb, inChannel);
}
/* \brief Increment the value of the currently selected RPN number by the specified amount.
\param inAmount The amount to add to the currently selected RPN value.
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendRpnIncrement(byte inAmount,
Channel inChannel)
{
sendControlChange(DataIncrement, inAmount, inChannel);
}
/* \brief Decrement the value of the currently selected RPN number by the specified amount.
\param inAmount The amount to subtract to the currently selected RPN value.
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendRpnDecrement(byte inAmount,
Channel inChannel)
{
sendControlChange(DataDecrement, inAmount, inChannel);
}
/*! \brief Terminate an RPN frame.
This will send a Null Function to deselect the currently selected RPN.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::endRpn(Channel inChannel)
{
sendControlChange(RPNLSB, 0x7f, inChannel);
sendControlChange(RPNMSB, 0x7f, inChannel);
mCurrentRpnNumber = 0xffff;
}
/*! \brief Start a Non-Registered Parameter Number frame.
\param inNumber The 14-bit number of the NRPN you want to select.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::beginNrpn(unsigned inNumber,
Channel inChannel)
{
if (mCurrentNrpnNumber != inNumber)
{
const byte numMsb = 0x7f & (inNumber >> 7);
const byte numLsb = 0x7f & inNumber;
sendControlChange(NRPNLSB, numLsb, inChannel);
sendControlChange(NRPNMSB, numMsb, inChannel);
mCurrentNrpnNumber = inNumber;
}
}
/*! \brief Send a 14-bit value for the currently selected NRPN number.
\param inValue The 14-bit value of the selected NRPN.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendNrpnValue(unsigned inValue,
Channel inChannel)
{;
const byte valMsb = 0x7f & (inValue >> 7);
const byte valLsb = 0x7f & inValue;
sendControlChange(DataEntryMSB, valMsb, inChannel);
sendControlChange(DataEntryLSB, valLsb, inChannel);
}
/*! \brief Send separate MSB/LSB values for the currently selected NRPN number.
\param inMsb The MSB part of the value to send. Meaning depends on NRPN number.
\param inLsb The LSB part of the value to send. Meaning depends on NRPN number.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendNrpnValue(byte inMsb,
byte inLsb,
Channel inChannel)
{
sendControlChange(DataEntryMSB, inMsb, inChannel);
sendControlChange(DataEntryLSB, inLsb, inChannel);
}
/* \brief Increment the value of the currently selected NRPN number by the specified amount.
\param inAmount The amount to add to the currently selected NRPN value.
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendNrpnIncrement(byte inAmount,
Channel inChannel)
{
sendControlChange(DataIncrement, inAmount, inChannel);
}
/* \brief Decrement the value of the currently selected NRPN number by the specified amount.
\param inAmount The amount to subtract to the currently selected NRPN value.
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::sendNrpnDecrement(byte inAmount,
Channel inChannel)
{
sendControlChange(DataDecrement, inAmount, inChannel);
}
/*! \brief Terminate an NRPN frame.
This will send a Null Function to deselect the currently selected NRPN.
\param inChannel The channel on which the message will be sent (1 to 16).
*/
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::endNrpn(Channel inChannel)
{
sendControlChange(NRPNLSB, 0x7f, inChannel);
sendControlChange(NRPNMSB, 0x7f, inChannel);
mCurrentNrpnNumber = 0xffff;
}
template<class Transport, class Settings, class Platform>
inline void MidiInterface<Transport, Settings, Platform>::updateLastSentTime()
{
if (Settings::UseSenderActiveSensing && mSenderActiveSensingPeriodicity)
mLastMessageSentTime = Platform::now();
}
/*! @} */ // End of doc group MIDI Output
// -----------------------------------------------------------------------------
template<class Transport, class Settings, class Platform>
StatusByte MidiInterface<Transport, Settings, Platform>::getStatus(MidiType inType,
Channel inChannel) const
{
return StatusByte(((byte)inType | ((inChannel - 1) & 0x0f)));
}
// -----------------------------------------------------------------------------
// Input
// -----------------------------------------------------------------------------
/*! \addtogroup input
@{
*/
/*! \brief Read messages from the serial port using the main input channel.
\return True if a valid message has been stored in the structure, false if not.
A valid message is a message that matches the input channel. \n\n
If the Thru is enabled and the message matches the filter,
it is sent back on the MIDI output.
@see see setInputChannel()
*/
template<class Transport, class Settings, class Platform>
inline bool MidiInterface<Transport, Settings, Platform>::read()
{
return read(mInputChannel);
}
/*! \brief Read messages on a specified channel.
*/
template<class Transport, class Settings, class Platform>
inline bool MidiInterface<Transport, Settings, Platform>::read(Channel inChannel)
{
#ifndef RegionActiveSending
// Active Sensing. This message is intended to be sent
// repeatedly to tell the receiver that a connection is alive. Use
// of this message is optional. When initially received, the
// receiver will expect to receive another Active Sensing
// message each 300ms (max), and if it does not then it will
// assume that the connection has been terminated. At
// termination, the receiver will turn off all voices and return to
// normal (non- active sensing) operation.
if (Settings::UseSenderActiveSensing && (mSenderActiveSensingPeriodicity > 0) && (Platform::now() - mLastMessageSentTime) > mSenderActiveSensingPeriodicity)
{
sendActiveSensing();
mLastMessageSentTime = Platform::now();
}
if (Settings::UseReceiverActiveSensing && mReceiverActiveSensingActivated && (mLastMessageReceivedTime + ActiveSensingTimeout < Platform::now()))
{
mReceiverActiveSensingActivated = false;
mLastError |= 1UL << ErrorActiveSensingTimeout; // set the ErrorActiveSensingTimeout bit
if (mErrorCallback)
mErrorCallback(mLastError);
}
#endif
if (inChannel >= MIDI_CHANNEL_OFF)
return false; // MIDI Input disabled.
if (!parse())
return false;
#ifndef RegionActiveSending
if (Settings::UseReceiverActiveSensing && mMessage.type == ActiveSensing)
{
// When an ActiveSensing message is received, the time keeping is activated.
// When a timeout occurs, an error message is send and time keeping ends.
mReceiverActiveSensingActivated = true;
// is ErrorActiveSensingTimeout bit in mLastError on
if (mLastError & (1 << (ErrorActiveSensingTimeout - 1)))
{
mLastError &= ~(1UL << ErrorActiveSensingTimeout); // clear the ErrorActiveSensingTimeout bit
if (mErrorCallback)
mErrorCallback(mLastError);
}
}
// Keep the time of the last received message, so we can check for the timeout
if (Settings::UseReceiverActiveSensing && mReceiverActiveSensingActivated)
mLastMessageReceivedTime = Platform::now();
#endif
handleNullVelocityNoteOnAsNoteOff();
const bool channelMatch = inputFilter(inChannel);
if (channelMatch)
launchCallback();
thruFilter(inChannel);
return channelMatch;
}
// -----------------------------------------------------------------------------
// Private method: MIDI parser
template<class Transport, class Settings, class Platform>
bool MidiInterface<Transport, Settings, Platform>::parse()
{
if (mTransport.available() == 0)
return false; // No data available.
// clear the ErrorParse bit
mLastError &= ~(1UL << ErrorParse);
// Parsing algorithm:
// Get a byte from the serial buffer.
// If there is no pending message to be recomposed, start a new one.
// - Find type and channel (if pertinent)
// - 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.
const byte extracted = mTransport.read();
// Ignore Undefined
if (extracted == Undefined_FD)
return (Settings::Use1ByteParsing) ? false : parse();
if (mPendingMessageIndex == 0)
{
// Start a new pending message
mPendingMessage[0] = extracted;
// Check for running status first
if (isChannelMessage(getTypeFromStatusByte(mRunningStatus_RX)))
{
// Only these types allow Running Status
// If the status byte is not received, prepend it
// to the pending message
if (extracted < 0x80)
{
mPendingMessage[0] = mRunningStatus_RX;
mPendingMessage[1] = extracted;
mPendingMessageIndex = 1;
}
// Else: well, we received another status byte,
// so the running status does not apply here.
// It will be updated upon completion of this message.
}
const MidiType pendingType = getTypeFromStatusByte(mPendingMessage[0]);
switch (pendingType)
{
// 1 byte messages
case Start:
case Continue:
case Stop:
case Clock:
case Tick:
case ActiveSensing:
case SystemReset:
case TuneRequest:
// Handle the message type directly here.
mMessage.type = pendingType;
mMessage.channel = 0;
mMessage.data1 = 0;
mMessage.data2 = 0;
mMessage.valid = true;
// Do not reset all input attributes, Running Status must remain unchanged.
// We still need to reset these
mPendingMessageIndex = 0;
mPendingMessageExpectedLength = 0;
return true;
break;
// 2 bytes messages
case ProgramChange:
case AfterTouchChannel:
case TimeCodeQuarterFrame:
case SongSelect:
mPendingMessageExpectedLength = 2;
break;
// 3 bytes messages
case NoteOn:
case NoteOff:
case ControlChange:
case PitchBend:
case AfterTouchPoly:
case SongPosition:
mPendingMessageExpectedLength = 3;
break;
case SystemExclusiveStart:
case SystemExclusiveEnd:
// The message can be any length
// between 3 and MidiMessage::sSysExMaxSize bytes
mPendingMessageExpectedLength = MidiMessage::sSysExMaxSize;
mRunningStatus_RX = InvalidType;
mMessage.sysexArray[0] = pendingType;
break;
case InvalidType:
default:
// This is obviously wrong. Let's get the hell out'a here.
mLastError |= 1UL << ErrorParse; // set the ErrorParse bit
if (mErrorCallback)
mErrorCallback(mLastError); // LCOV_EXCL_LINE
resetInput();
return false;
break;
}
if (mPendingMessageIndex >= (mPendingMessageExpectedLength - 1))
{
// Reception complete
mMessage.type = pendingType;
mMessage.channel = getChannelFromStatusByte(mPendingMessage[0]);
mMessage.data1 = mPendingMessage[1];
mMessage.data2 = 0; // Completed new message has 1 data byte
mMessage.length = 1;
mPendingMessageIndex = 0;
mPendingMessageExpectedLength = 0;
mMessage.valid = true;
return true;
}
else
{
// Waiting for more data
mPendingMessageIndex++;
}
return (Settings::Use1ByteParsing) ? false : parse();
}
else
{
// First, test if this is a status byte
if (extracted >= 0x80)
{
// Reception of status bytes in the middle of an uncompleted message
// are allowed only for interleaved Real Time message or EOX
switch (extracted)
{
case Clock:
case Start:
case Tick:
case Continue:
case Stop:
case ActiveSensing:
case SystemReset:
// Here we will have to extract the one-byte message,
// pass it to the structure for being read outside
// the MIDI class, and recompose the message it was
// interleaved into. Oh, and without killing the running status..
// This is done by leaving the pending message as is,
// it will be completed on next calls.
mMessage.type = (MidiType)extracted;
mMessage.data1 = 0;
mMessage.data2 = 0;
mMessage.channel = 0;
mMessage.length = 1;
mMessage.valid = true;
return true;
// Exclusive
case SystemExclusiveStart:
case SystemExclusiveEnd:
if ((mMessage.sysexArray[0] == SystemExclusiveStart)
|| (mMessage.sysexArray[0] == SystemExclusiveEnd))
{
// Store the last byte (EOX)
mMessage.sysexArray[mPendingMessageIndex++] = extracted;
mMessage.type = SystemExclusive;
// Get length
mMessage.data1 = mPendingMessageIndex & 0xff; // LSB
mMessage.data2 = byte(mPendingMessageIndex >> 8); // MSB
mMessage.channel = 0;
mMessage.length = mPendingMessageIndex;
mMessage.valid = true;
resetInput();
return true;
}
else
{
// Well well well.. error.
mLastError |= 1UL << ErrorParse; // set the error bits
if (mErrorCallback)
mErrorCallback(mLastError); // LCOV_EXCL_LINE
resetInput();
return false;
}
default:
break; // LCOV_EXCL_LINE - Coverage blind spot
}
}
// Add extracted data byte to pending message
if ((mPendingMessage[0] == SystemExclusiveStart)
|| (mPendingMessage[0] == SystemExclusiveEnd))
mMessage.sysexArray[mPendingMessageIndex] = extracted;
else