Initial implementation of sample-exact models and controllers

Also featuring a very efficient buffer-based system for transporting sample-exact control data
Also interpolation for automations
The native Amplifier is a reference implementation for taking advantage of sample-exact data and is currently
the only one that does so, it can be used to test things out, and as documentation/example for implementing the
same elsewhere

include/AutomatableModel.h

@@ -30,6 +30,7 @@
 #include "JournallingObject.h"
 #include "Model.h"
 #include "MidiTime.h"
+#include "ValueBuffer.h"
 
 
 // simple way to map a property of a view to a model
@@ -98,6 +99,13 @@ public:
 	}
 
 	bool isAutomated() const;
+	bool isAutomatedOrControlled() const
+	{
+		return isAutomated() || m_controllerConnection != NULL;
+	}
+	
+	bool hasSampleExactData() const;
+
 
 	ControllerConnection* controllerConnection() const
 	{
@@ -134,6 +142,12 @@ public:
 
 	float controllerValue( int frameOffset ) const;
 
+	// returns sample-exact data as a ValueBuffer
+	// should only be called when sample-exact data exists
+	// in other cases (eg. for automation), the receiving end should interpolate
+	// the values themselves
+	ValueBuffer * valueBuffer();
+
 	template<class T>
 	T initValue() const
 	{
@@ -241,6 +255,16 @@ public:
 	}
 
 	float globalAutomationValueAt( const MidiTime& time );
+	
+	bool strictStepSize() const
+	{
+		return m_strictStepSize;
+	}
+	
+	void setStrictStepSize( const bool b )
+	{
+		m_strictStepSize = b;
+	}
 
 public slots:
 	virtual void reset();
@@ -254,7 +278,7 @@ protected:
 	//! max() and aligned according to the step size (step size 0.05 -> value
 	//! 0.12345 becomes 0.10 etc.). You should always call it at the end after
 	//! doing your own calculations.
-	float fittedValue( float value ) const;
+	float fittedValue( float value, bool forceStep = false ) const;
 
 
 private:
@@ -290,10 +314,13 @@ private:
 	float m_range;
 	float m_centerValue;
 
-	// most objects will need this temporarily (until sampleExact is
-	// standard)
+	// currently unused?
 	float m_oldValue;
 	int m_setValueDepth;
+	
+	// used to determine if step size should be applied strictly (ie. always)
+	// or only when value set from gui (default)
+	bool m_strictStepSize;
 
 	AutoModelVector m_linkedModels;
 	bool m_hasLinkedModels;
@@ -305,6 +332,7 @@ private:
 
 	static float s_copiedValue;
 
+	ValueBuffer m_valueBuffer;
 
 signals:
 	void initValueChanged( float val );

include/Controller.h

@@ -31,6 +31,7 @@
 #include "Mixer.h"
 #include "Model.h"
 #include "JournallingObject.h"
+#include "ValueBuffer.h"
 
 class ControllerDialog;
 class Controller;
@@ -62,6 +63,8 @@ public:
 	virtual ~Controller();
 
 	virtual float currentValue( int _offset );
+	// The per-controller get-value-in-buffers function
+	virtual ValueBuffer * valueBuffer();
 
 	inline bool isSampleExact() const
 	{
@@ -111,6 +114,10 @@ public:
 		return tLimit<float>( _val, 0.0f, 1.0f );
 	}
 
+	static unsigned int runningPeriods()
+	{
+		return s_periods;
+	}
 	static unsigned int runningFrames();
 	static float runningTime();
 
@@ -138,6 +145,15 @@ protected:
 	// The internal per-controller get-value function
 	virtual float value( int _offset );
 
+	virtual void updateValueBuffer();
+
+	// buffer for storing sample-exact values in case there
+	// are more than one model wanting it, so we don't have to create it
+	// again every time
+	ValueBuffer m_valueBuffer;
+	// when we last updated the valuebuffer - so we know if we have to update it
+	unsigned int m_bufferLastUpdated;
+
 	float m_currentValue;
 	bool  m_sampleExact;
 	int m_connectionCount;
@@ -147,7 +163,7 @@ protected:
 
 	static ControllerVector s_controllers;
 
-	static unsigned int s_frames;
+	static unsigned int s_periods;
 
 
 signals:

include/ControllerConnection.h

@@ -27,14 +27,15 @@
  */
 
 
-#ifndef _CONTROLLER_CONNECTION_H
-#define _CONTROLLER_CONNECTION_H
+#ifndef CONTROLLER_CONNECTION_H
+#define CONTROLLER_CONNECTION_H
 
 #include <QtCore/QObject>
 #include <QtCore/QVector>
 
 #include "Controller.h"
 #include "JournallingObject.h"
+#include "ValueBuffer.h"
 
 class ControllerConnection;
 
@@ -64,6 +65,11 @@ public:
 	{
 		return m_controller->currentValue( _offset );
 	}
+	
+	ValueBuffer * valueBuffer()
+	{
+		return m_controller->valueBuffer();
+	}
 
 	inline void setTargetName( const QString & _name );
 

include/LfoController.h

@@ -22,8 +22,8 @@
  *
  */
 
-#ifndef _LFO_CONTROLLER_H
-#define _LFO_CONTROLLER_H
+#ifndef LFO_CONTROLLER_H
+#define LFO_CONTROLLER_H
 
 #include <QtGui/QWidget>
 
@@ -59,8 +59,8 @@ public slots:
 
 
 protected:
-	// The internal per-controller get-value function
-	virtual float value( int _offset );
+	// The internal per-controller value updating function
+	virtual void updateValueBuffer();
 
 	FloatModel m_baseModel;
 	TempoSyncKnobModel m_speedModel;
@@ -69,17 +69,19 @@ protected:
 	IntModel m_waveModel;
 	IntModel m_multiplierModel;
 
-	int m_duration;
-	int m_phaseCorrection;
-	int m_phaseOffset;
-	
+	float m_duration;
+	float m_phaseOffset;
+	float m_currentPhase;
+
 	sample_t (*m_sampleFunction)( const float );
 
 private:
 	SampleBuffer * m_userDefSampleBuffer;
 
 protected slots:
+	void updatePhase();
 	void updateSampleFunction();
+	void updateDuration();
 
 	friend class LfoControllerDialog;
 

include/MidiController.h

@@ -22,8 +22,8 @@
  *
  */
 
-#ifndef _MIDI_CONTROLLER_H
-#define _MIDI_CONTROLLER_H
+#ifndef MIDI_CONTROLLER_H
+#define MIDI_CONTROLLER_H
 
 #include <QtGui/QWidget>
 
@@ -67,13 +67,14 @@ public slots:
 
 protected:
 	// The internal per-controller get-value function
-	virtual float value( int _offset );
+	virtual void updateValueBuffer();
 
 
 	MidiPort m_midiPort;
 
 
 	float m_lastValue;
+	float m_previousValue;
 
 	friend class ControllerConnectionDialog;
 	friend class AutoDetectMidiController;

include/PeakController.h

@@ -22,8 +22,8 @@
  *
  */
 
-#ifndef _PEAK_CONTROLLER_H
-#define _PEAK_CONTROLLER_H
+#ifndef PEAK_CONTROLLER_H
+#define PEAK_CONTROLLER_H
 
 #include <QtGui/QWidget>
 
@@ -65,7 +65,7 @@ public slots:
 
 protected:
 	// The internal per-controller get-value function
-	virtual float value( int _offset );
+	virtual void updateValueBuffer();
 
 	PeakControllerEffect * m_peakEffect;
 

include/ValueBuffer.h

@@ -0,0 +1,137 @@
+/*
+ * ValueBuffer.h - a container class for passing buffers of model values around
+ *
+ * Copyright (c) 2014 Vesa Kivimäki <contact/dot/diizy/at/nbl/dot/fi>
+ * Copyright (c) 2008-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * 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 2 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 (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef VALUE_BUFFER_H
+#define VALUE_BUFFER_H
+
+#include "interpolation.h"
+#include <string.h>
+
+class ValueBuffer
+{
+public:
+	ValueBuffer()
+	{
+		m_values = NULL;
+		m_length = 0;
+	}
+	
+	ValueBuffer( int length )
+	{
+		m_values = new float[length];
+		m_length = length;
+	}
+
+	ValueBuffer( float * values, int length )
+	{
+		m_values = new float[length];
+		m_length = length;		
+		memcpy( m_values, values, sizeof(float) * length );
+	}
+
+	ValueBuffer( float value, int length )
+	{
+		m_values = new float[length];
+		m_length = length;
+		for( int i = 0; i < length; i++ )
+		{
+			m_values[i] = value;
+		}
+	}
+
+	virtual ~ValueBuffer() 
+	{
+		delete[] m_values;
+	}
+
+	void clear()
+	{
+		delete[] m_values;
+		m_values = NULL;
+		m_length = 0;
+	}
+	
+	void fill( float value )
+	{
+		for( int i = 0; i < m_length; i++ )
+		{
+			m_values[i] = value;
+		}
+	}
+
+	float value( int offset ) const
+	{
+		return m_values[ offset % m_length ];
+	}
+	
+	void setValue( int offset, float value )
+	{
+		m_values[ offset % m_length ] = value;
+	}
+
+	float * values() const
+	{
+		return m_values;
+	}
+	
+	void setValues( float * values )
+	{
+		m_values = values;
+	}
+	
+	int length() const
+	{
+		return m_length;
+	}
+	
+	void setLength( const int length )
+	{
+		m_length = length;
+	}
+
+	void interpolate( float start, float end )
+	{
+		float f = 0.0f;
+		const float fstep = 1.0f / static_cast<float>( m_length );
+		for( int i = 0; i < m_length; i++ )
+		{
+			f += fstep;
+			m_values[i] = linearInterpolate( start, end, f );
+		}
+	}
+
+	static ValueBuffer interpolatedBuffer( float start, float end, int length )
+	{
+		ValueBuffer vb = ValueBuffer( length );
+		vb.interpolate( start, end );
+		return vb;
+	}
+
+private:
+	float * m_values;
+	int m_length;
+};
+
+#endif