view Source/Mappings/MIDIKeyPositionMapping.h @ 20:dfff66c07936

Lots of minor changes to support building on Visual Studio. A few MSVC-specific #ifdefs to eliminate things Visual Studio doesn't like. This version now compiles on Windows (provided liblo, Juce and pthread are present) but the TouchKeys device support is not yet enabled. Also, the code now needs to be re-checked on Mac and Linux.

/*
  TouchKeys: multi-touch musical keyboard control software
  Copyright (c) 2013 Andrew McPherson

  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 3 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, see <http://www.gnu.org/licenses/>.
 
  =====================================================================

  MIDIKeyPositionMapping.h: handles generating MIDI data out of continuous
  key position.
*/

#ifndef __touchkeys__MIDIKeyPositionMapping__
#define __touchkeys__MIDIKeyPositionMapping__

#include <map>
#include <boost/bind.hpp>
#include "../TouchKeys/KeyTouchFrame.h"
#include "../TouchKeys/KeyPositionTracker.h"
#include "../TouchKeys/PianoKeyboard.h"
#include "Mapping.h"

// This class handles the mapping from continuous key position to
// MIDI messages: note on, note off, aftertouch.

class MIDIKeyPositionMapping : public Mapping {
private:
    /*const int kDefaultMIDIChannel = 0;
    const float kDefaultAftertouchScaler = 127.0 / 0.03;   // Default aftertouch sensitivity: MIDI 127 = 0.03
    const float kMinimumAftertouchPosition = 0.99;         // Position at which aftertouch messages start
    const float kDefaultPercussivenessScaler = 1.0 / 300.0; // Default scaler from percussiveness feature to MIDI
    const key_velocity kPianoKeyVelocityForMaxMIDI = scale_key_velocity(40.0);           // Press velocity for MIDI 127
    const key_velocity kPianoKeyReleaseVelocityForMaxMIDI = scale_key_velocity(-50.0);   // Release velocity for MIDI 127*/
    static const int kDefaultMIDIChannel;
    static const float kDefaultAftertouchScaler;  // Default aftertouch sensitivity: MIDI 127 = 0.03
    static const float kMinimumAftertouchPosition; // Position at which aftertouch messages start
    static const float kDefaultPercussivenessScaler; // Default scaler from percussiveness feature to MIDI
    static const key_velocity kPianoKeyVelocityForMaxMIDI;           // Press velocity for MIDI 127
    static const key_velocity kPianoKeyReleaseVelocityForMaxMIDI;    // Release velocity for MIDI 127
    
public:
	// ***** Constructors *****
	
	// Default constructor, passing the buffer on which to trigger
	MIDIKeyPositionMapping(PianoKeyboard &keyboard, MappingFactory *factory, int noteNumber, Node<KeyTouchFrame>* touchBuffer,
               Node<key_position>* positionBuffer, KeyPositionTracker* positionTracker);
	
	// Copy constructor
	MIDIKeyPositionMapping(MIDIKeyPositionMapping const& obj);
    
    // ***** Destructor *****
    
    ~MIDIKeyPositionMapping();
	
    // ***** Modifiers *****
    
    // Disable mappings from being sent
    void disengage();
	
    // Reset the state back initial values
	void reset();
    
    // Set the aftertouch sensitivity on continuous key position
    // 0 means no aftertouch, 1 means default sensitivity, upward
    // from there
    void setAftertouchSensitivity(float sensitivity);
    
    // Get or set the MIDI channel (0-15)
    int midiChannel() { return midiChannel_; }
    void setMIDIChannel(int ch) {
        if(ch >= 0 && ch < 16)
            midiChannel_ = ch;
    }
    
    // Get or set the MIDI channel for percussiveness messages
    int percussivenessMIDIChannel() { return midiPercussivenessChannel_; }
    void setPercussivenessMIDIChannel(int ch) {
        if(ch >= 0 && ch < 16)
            midiPercussivenessChannel_ = ch;
        else
            midiPercussivenessChannel_ = -1;
    }
    void disableMIDIPercussiveness() { midiPercussivenessChannel_ = -1; }
    
	// ***** Evaluators *****
	
    // This method receives triggers whenever events occur in the touch data or the
    // continuous key position (state changes only). It alters the behavior and scheduling
    // of the mapping but does not itself send OSC messages
	void triggerReceived(TriggerSource* who, timestamp_type timestamp);
	
    // This method handles the OSC message transmission. It should be run in the Scheduler
    // thread provided by PianoKeyboard.
    timestamp_type performMapping();
    
private:
    // ***** Private Methods *****

    void generateMidiNoteOn();
    void generateMidiNoteOff();
    void generateMidiPercussivenessNoteOn();
    
	// ***** Member Variables *****
    
    bool noteIsOn_;                             // Whether the MIDI note is active or not
    float aftertouchScaler_;                    // Scaler which affects aftertouch sensitivity
    int midiChannel_;                           // Channel on which to transmit MIDI messages
    int lastAftertouchValue_;                   // Value of the last aftertouch message
    int midiPercussivenessChannel_;             // Whether and where to transmit percussiveness messages
};


#endif /* defined(__touchkeys__MIDIKeyPositionMapping__) */