Wave.cpp

/*
 *  Wave.cpp
 *  Sin
 *
 *  Created by blucia0a on 8/25/11.
 *  Copyright 2011 __MyCompanyName__. All rights reserved.
 *
 */

#include "Wave.h"
#include <math.h>
Wave::Wave(double frq, double srate, double amp = 0.5){
	
	//Sample rate is passed in from the HAL deviceInfo structure
	this->srate = srate;
	
	// initialize phase and de-zipper filters.
    phase = 0.0;
	this->freqz = this->freq = frq * 2. * 3.14159265459 / srate; 
    this->ampz = this->amp = amp;

}

void Wave::getNextSample(float *out){
	
	float wave = sin(this->phase) * this->ampz;		// generate sine wave
	this->phase = this->phase + this->freqz;			// increment phase
	
	// write output
	out[0] = wave;	// left channel
	out[1] = wave;	// right channel
	
	// de-zipper controls
	this->ampz  = 0.001 * this->amp  + 0.999 * this->ampz;
	this->freqz = 0.001 * this->freq + 0.999 * this->freqz;	
}

void Wave::setAmpVal(double val){
    this->amp = val;
}

void Wave::setFreqVal(double val){
    this->freq = val * 2. * 3.14159265359 / this->srate;
}