view Source/Mappings/OnsetAngle/TouchkeyOnsetAngleMapping.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/>.
 
  =====================================================================

  TouchkeyOnsetAngleMapping.h: per-note mapping for the onset angle mapping,
  which measures the speed of finger motion along the key surface at the
  time of MIDI note onset.
*/


#ifndef __TouchKeys__TouchkeyOnsetAngleMapping__
#define __TouchKeys__TouchkeyOnsetAngleMapping__

#include "../TouchkeyBaseMapping.h"

// This class handles the detection of finger motion specifically at
// note release, which can be used to trigger specific release effects.

class TouchkeyOnsetAngleMapping : public TouchkeyBaseMapping {
private:
    // Default values
    /*constexpr static const int kDefaultFilterBufferLength = 30;
     constexpr static const timestamp_diff_type kDefaultMaxLookbackTime = milliseconds_to_timestamp(100);*/
    
    static const int kDefaultFilterBufferLength;
    static const timestamp_diff_type kDefaultMaxLookbackTime;
    static const int kDefaultMaxLookbackSamples;
    
public:
	// ***** Constructors *****
	
	// Default constructor, passing the buffer on which to trigger
	TouchkeyOnsetAngleMapping(PianoKeyboard &keyboard, MappingFactory *factory, int noteNumber, Node<KeyTouchFrame>* touchBuffer,
                                Node<key_position>* positionBuffer, KeyPositionTracker* positionTracker);
	
    // ***** Modifiers *****
    
    // Reset the state back initial values
    void reset();
    
    // Resend the current state of all parameters
    void resend();
    
	// ***** 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();
    
    // ***** Specific Methods *****
    // Process the release by calculating the angle
    void processOnset(timestamp_type timestamp);
    
private:
    // ***** Private Methods *****
    
    void sendOnsetAngleMessage(float onsetAngle, bool force = false);
    void sendPitchBendMessage(float pitchBendSemitones, bool force = false);
    
	// ***** Member Variables *****
    
    Node<KeyTouchFrame> pastSamples_;           // Locations of touch
    timestamp_diff_type maxLookbackTime_;       // How long to look backwards to find release velocity
    CriticalSection sampleBufferMutex_;         // Mutex to protect threaded access to sample buffer
    
    float startingPitchBendSemitones_;          // The value of pitch bend to start with
    float lastPitchBendSemitones_;              // The last pitch value we sent out
    timestamp_type rampBeginTime_;              // When did the pitch bend ramp begin?
    timestamp_diff_type rampLength_;            // How long should the ramp be?
};

#endif /* defined(__TouchKeys__TouchkeyOnsetAngleMapping__) */