# HG changeset patch
# User Giulio Moro <giuliomoro@yahoo.it>
# Date 1460251252 -7200
# Node ID 18d03901f866288ded1c48a0714a07744755091c
# Parent  600355cf4ed5d9b9ac9600a8b310ace2f0728227
Turned gShouldStop into int

diff -r 600355cf4ed5 -r 18d03901f866 .cproject
--- a/.cproject	Sun Apr 10 03:14:33 2016 +0200
+++ b/.cproject	Sun Apr 10 03:20:52 2016 +0200
@@ -178,7 +178,7 @@
 									<listOptionValue builtIn="false" value="/usr/local/linaro/arm-linux-gnueabihf/include/"/>
 								</option>
 								<option id="gnu.cpp.compiler.option.dialect.std.776548502" name="Language standard" superClass="gnu.cpp.compiler.option.dialect.std" value="gnu.cpp.compiler.dialect.default" valueType="enumerated"/>
-								<option id="gnu.cpp.compiler.option.other.other.398422461" name="Other flags" superClass="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 -U_FORTIFY_SOURCE" valueType="string"/>
+								<option id="gnu.cpp.compiler.option.other.other.398422461" name="Other flags" superClass="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 -U_FORTIFY_SOURCE -O3 -march=armv7-a -mtune=cortex-a8 -mfloat-abi=hard -mfpu=neon --fast-math -ftree-vectorize -ftree-vectorizer-verbose=10" valueType="string"/>
 								<inputType id="cdt.managedbuild.tool.gnu.cpp.compiler.input.601059736" superClass="cdt.managedbuild.tool.gnu.cpp.compiler.input"/>
 							</tool>
 							<tool command="arm-linux-gnueabihf-gcc" commandLinePattern="${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}" id="cdt.managedbuild.tool.gnu.c.compiler.exe.release.1302828968" name="GCC C Compiler" superClass="cdt.managedbuild.tool.gnu.c.compiler.exe.release">
@@ -198,6 +198,7 @@
 								<option id="gnu.c.compiler.option.preprocessor.undef.symbol.980935416" name="Undefined symbols (-U)" superClass="gnu.c.compiler.option.preprocessor.undef.symbol" valueType="undefDefinedSymbols">
 									<listOptionValue builtIn="false" value="_FORTIFY_SOURCE"/>
 								</option>
+								<option id="gnu.c.compiler.option.misc.other.1568308112" name="Other flags" superClass="gnu.c.compiler.option.misc.other" value="-c -fmessage-length=0 -O3 -march=armv7-a -mtune=cortex-a8 -mfloat-abi=hard -mfpu=neon --fast-math -ftree-vectorize -ftree-vectorizer-verbose=10" valueType="string"/>
 								<inputType id="cdt.managedbuild.tool.gnu.c.compiler.input.574072828" superClass="cdt.managedbuild.tool.gnu.c.compiler.input"/>
 							</tool>
 							<tool command="arm-linux-gnueabihf-g++&#10;" id="cdt.managedbuild.tool.gnu.c.linker.exe.release.281634187" name="GCC C Linker" superClass="cdt.managedbuild.tool.gnu.c.linker.exe.release"/>
diff -r 600355cf4ed5 -r 18d03901f866 core/IirFilter.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/IirFilter.cpp	Sun Apr 10 03:20:52 2016 +0200
@@ -0,0 +1,69 @@
+/*
+ * IirFilter.cpp
+ *
+ *  Created on: 17 Sep 2015
+ *      Author: giulio
+ */
+#include "IirFilter.h"
+
+IirFilterStage::IirFilterStage(){
+	for(int n = 0; n < IIR_FILTER_STAGE_COEFFICIENTS; n++){
+		coefficients[n] = 0;
+	}
+	for(int n = 0; n < IIR_FILTER_STAGE_STATES; n++){
+		states[n]=0;
+	}
+}
+void IirFilterStage::setCoefficients(double* newCoefficients){
+	for(int n = 0; n < IIR_FILTER_STAGE_COEFFICIENTS; n++){
+		coefficients[n] = newCoefficients[n];
+	}
+}
+void IirFilterStage::setStates(double* newStates){
+	for(int n = 0; n < IIR_FILTER_STAGE_STATES; n++){
+		states[n] = newStates[n];
+	}
+}
+
+/*	struct IirFilterStage* stages;
+	int numberOfStages;
+*/
+IirFilter::IirFilter(){
+	stages=(IirFilterStage**)0;
+	setNumberOfStages(0);
+}
+IirFilter::IirFilter(int newNumberOfStages){
+	setNumberOfStages(newNumberOfStages);
+}
+IirFilter::IirFilter(int newNumberOfStages, double* newCoefficients){
+	setNumberOfStages(newNumberOfStages);
+	setCoefficients(newCoefficients);
+}
+void IirFilter::dealloc(){
+	if( stages == 0 )
+		return;
+	for(int n = 0; n < numberOfStages; n++){
+		delete stages[n];
+	}
+	delete stages;
+	stages = 0;
+	numberOfStages = 0;
+}
+void IirFilter::setCoefficients(double* newCoefficients){
+	for(int n = 0; n < numberOfStages; n++){
+		stages[n]->setCoefficients(newCoefficients);
+	}
+};
+void IirFilter::setStates(double* newStates){
+	for(int n = 0; n < numberOfStages; n++){
+			stages[n]->setStates(newStates);
+	}
+};
+void IirFilter::setNumberOfStages(int newNumberOfStages){
+	dealloc();
+	numberOfStages=newNumberOfStages;
+	stages = new IirFilterStage*[numberOfStages];
+	for( int n = 0; n < numberOfStages; n++){
+		stages[n] = new IirFilterStage;
+	}
+}
diff -r 600355cf4ed5 -r 18d03901f866 core/RTAudio.cpp
--- a/core/RTAudio.cpp	Sun Apr 10 03:14:33 2016 +0200
+++ b/core/RTAudio.cpp	Sun Apr 10 03:20:52 2016 +0200
@@ -64,7 +64,7 @@
 }
 
 // Flag which tells the audio task to stop
-bool gShouldStop = false;
+int gShouldStop = false;
 
 // general settings
 char gPRUFilename[MAX_PRU_FILENAME_LENGTH];		// Path to PRU binary file (internal code if empty)_
diff -r 600355cf4ed5 -r 18d03901f866 include/BeagleRT.h
--- a/include/BeagleRT.h	Sun Apr 10 03:14:33 2016 +0200
+++ b/include/BeagleRT.h	Sun Apr 10 03:20:52 2016 +0200
@@ -271,7 +271,7 @@
  * to indicate that audio processing should terminate. Calling BeagleRT_stopAudio()
  * has the effect of setting this to \c true.
  */
-extern bool gShouldStop;
+extern int gShouldStop;
 
 // *** User-defined render functions ***
 
diff -r 600355cf4ed5 -r 18d03901f866 include/IirFilter.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/IirFilter.h	Sun Apr 10 03:20:52 2016 +0200
@@ -0,0 +1,86 @@
+/*
+ * IirFilter.h
+ *
+ *  Created on: 17 Sep 2015
+ *      Author: giulio
+ */
+
+#ifndef IIRFILTER_H_
+#define IIRFILTER_H_
+
+#define IIR_FILTER_STAGE_COEFFICIENTS (5)
+#define IIR_FILTER_STAGE_STATES (IIR_FILTER_STAGE_COEFFICIENTS - 1)
+
+class IirFilterStage{ //TODO : to save (some) memory we should only store the coefficients pointers here,
+						//so that IirFilter can share them among multiple stages if needbe)
+private:
+	double coefficients[IIR_FILTER_STAGE_COEFFICIENTS]; // these are b0,b1,b2,a1,a2
+	double states[IIR_FILTER_STAGE_STATES]; // these are xprev, xprevprev, yprev, yprevprev
+public:
+	IirFilterStage();
+	void setCoefficients(double* newCoefficients);
+	void setStates(double* newStates);
+	// this is not meant to be efficient, just of practical use!
+	double process(double in){
+		process(&in, 1);
+		return in;
+	}
+
+	void process(double* inout, int length){
+		// make variables explicit. A smart compiler will optimize these out, right?
+		double b0=coefficients[0];
+		double b1=coefficients[1];
+		double b2=coefficients[2];
+		double a1=coefficients[3];
+		double a2=coefficients[4];
+		double x1 = states[0];
+		double x2=  states[1];
+		double y1 = states[2];
+		double y2 = states[3];
+		for(int n = 0; n < length; n++){
+			double x0 = inout[n];
+			double y = x0 * b0 + x1 * b1 + x2 * b2 +
+					- y1 * a1 - y2 * a2;
+			inout[n] = y;
+			x2 = x1;
+			x1 = x0;
+			y2 = y1;
+			y1 = y;
+		}
+		states[0] = x1;
+		states[1] = x2;
+		states[2] = y1;
+		states[3] = y2;
+	}
+};
+
+class IirFilter{
+private:
+	struct IirFilterStage** stages;
+	int numberOfStages;
+	void dealloc();
+public:
+	IirFilter();
+	IirFilter(int newNumberOfStages);
+	IirFilter(int newNumberOfStages, double *newCoefficients);
+	void setCoefficients(double* newCoefficients);
+	void setStates(double* newStates);
+	void setNumberOfStages(int newNumberOfStages);
+//	double process(double in);
+//	inline void process(double* inout, int length);
+//	inline void process(double* in, double* out, int length);
+	double process(double in){
+		process(&in, 1);
+		return in;
+	};
+	void process(double* inout, int length){
+		for(int n = 0; n < numberOfStages && n < 8/* TODO: this "8" compensates for a memory corruption somewhere on the BBB*/; n++){
+			stages[n]->process(inout, length);
+		}
+	}
+};
+
+
+//void IirFilter::process(double* in, double* out, int length);
+
+#endif /* IIRFILTER_H_ */
diff -r 600355cf4ed5 -r 18d03901f866 include/NetworkSend.h
--- a/include/NetworkSend.h	Sun Apr 10 03:14:33 2016 +0200
+++ b/include/NetworkSend.h	Sun Apr 10 03:20:52 2016 +0200
@@ -11,7 +11,7 @@
 #include <UdpClient.h>
 #include <vector>
 #include <string>
-extern bool gShouldStop;
+extern int gShouldStop;
 #endif /* USE_JUCE */
 
 #define NETWORK_AUDIO_BUFFER_SIZE 302
diff -r 600355cf4ed5 -r 18d03901f866 projects/d-box/logger.cpp
--- a/projects/d-box/logger.cpp	Sun Apr 10 03:14:33 2016 +0200
+++ b/projects/d-box/logger.cpp	Sun Apr 10 03:20:52 2016 +0200
@@ -8,7 +8,7 @@
 #include "logger.h"
 
 // main extern vars
-extern bool gShouldStop;
+extern int gShouldStop;
 extern int gVerbose;
 
 // file nanme extern vars
diff -r 600355cf4ed5 -r 18d03901f866 projects/d-box/sensors.cpp
--- a/projects/d-box/sensors.cpp	Sun Apr 10 03:14:33 2016 +0200
+++ b/projects/d-box/sensors.cpp	Sun Apr 10 03:20:52 2016 +0200
@@ -22,7 +22,7 @@
 extern vector<OscillatorBank*> gOscBanks;
 extern int gCurrentOscBank;
 extern int gNextOscBank;
-extern bool gShouldStop;
+extern int gShouldStop;
 extern int gVerbose;
 
 float gSensor0LatestTouchPos = 0;	// most recent pitch touch location [0-1] on sensor 0, used by render.cpp