Merge branch 'CAR' of https://github.com/interpretivechaos/GUI into interpretivechaos-CAR

Source/Processors/CAR/CAR.cpp

+
+/*
+    ------------------------------------------------------------------
+
+    This file is part of the Open Ephys GUI
+    Copyright (C) 2014 Open Ephys
+
+    ------------------------------------------------------------------
+
+    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/>.
+
+*/
+
+
+
+
+#include <stdio.h>
+#include "CAR.h"
+    
+CAR::CAR()
+    : GenericProcessor("Common Avg Ref") //, threshold(200.0), state(true)
+
+{
+
+    parameters.add(Parameter("Gain (%)", 0.0, 100.0, 100.0, 0));
+
+}
+
+CAR::~CAR()
+{
+
+}
+
+
+
+void CAR::setParameter(int parameterIndex, float newValue)
+{
+    editor->updateParameterButtons(parameterIndex);
+    // std::cout << "Setting CAR Gain" << std::endl;
+
+    if (currentChannel >= 0)
+    {
+        Parameter& p =  parameters.getReference(parameterIndex);
+        p.setValue(newValue, currentChannel);
+    }
+}
+
+void CAR::process(AudioSampleBuffer& buffer,
+                               MidiBuffer& events,
+                               int& nSamples)
+{
+	int nChannels=buffer.getNumChannels();
+    for (int i = 0; i < nSamples; i++)
+    {
+    	float average=0;
+    	for (int j = 0; j < (nChannels); j++)
+    	{
+    		average=average+buffer.getSample(j, i);
+    	}
+    	average=average/nChannels;
+
+    	for (int j = 0; j < nChannels; j++)
+    	{
+    		float gain=getParameterVar(0, j);
+    		// Subtract from sample
+    		float subtracted=(buffer.getSample(j,i)*(1+(1/nChannels*gain/100))-average*gain/100);
+			buffer.setSample(j,i, subtracted);
+    	}    	
+    }
+}

Source/Processors/CAR/CAR.h

+/*
+    ------------------------------------------------------------------
+
+    This file is part of the Open Ephys GUI
+    Copyright (C) 2014 Open Ephys
+
+    ------------------------------------------------------------------
+
+    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/>.
+
+*/
+
+#ifndef CAR_H_INCLUDED
+#define CAR_H_INCLUDED
+
+
+#ifdef _WIN32
+#include <Windows.h>
+#endif
+
+#include "../../JuceLibraryCode/JuceHeader.h"
+#include "../GenericProcessor/GenericProcessor.h"
+
+/**
+
+    This is a simple filter that subtracts the average of all other channels from 
+    each channel. The gain parameter allows you to subtract a percentage of the total avg.
+
+	See Ludwig et al. 2009 Using a common average reference to improve cortical
+	neuron recordings from microelectrode arrays. J. Neurophys, 2009 for a detailed
+	discussion
+
+	
+*/
+
+class CAR : public GenericProcessor
+
+{
+public:
+
+    /** The class constructor, used to initialize any members. */
+    CAR();
+
+    /** The class destructor, used to deallocate memory */
+    ~CAR();
+
+    /** Determines whether the processor is treated as a source. */
+    bool isSource()
+    {
+        return false;
+    }
+
+    /** Determines whether the processor is treated as a sink. */
+    bool isSink()
+    {
+        return false;
+    }
+
+    /** Defines the functionality of the processor.
+
+        The process method is called every time a new data buffer is available.
+
+        Processors can either use this method to add new data, manipulate existing
+        data, or send data to an external target (such as a display or other hardware).
+
+        Continuous signals arrive in the "buffer" variable, event data (such as TTLs
+        and spikes) is contained in the "events" variable, and "nSamples" holds the
+        number of continous samples in the current buffer (which may differ from the
+        size of the buffer).
+         */
+    void process(AudioSampleBuffer& buffer, MidiBuffer& events, int& nSamples);
+
+    /** Any variables used by the "process" function _must_ be modified only through
+        this method while data acquisition is active. If they are modified in any
+        other way, the application will crash.  */
+    void setParameter(int parameterIndex, float newValue);
+
+private:
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(CAR);
+
+};
+
+
+
+
+#endif  // CAR_H_INCLUDED