/*
* Created on Nov 26, 2004
*
* Copyright (c) 2005 Peter Johan Salomonsen (http://www.petersalomonsen.com)
*
* http://www.frinika.com
*
* This file is part of Frinika.
*
* Frinika 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.
*
* Frinika 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 Frinika; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.frinika.synth;
import com.frinika.voiceserver.VoiceInterrupt;
import com.frinika.synth.waveforms.Sinus;
/**
* @author Peter Johan Salomonsen
*
*/
public class PreOscillator extends Oscillator {
int amount = 0;
float[] lfoBuffer;
public float[] sampleBuffer = null;
public int pitchBend;
public float pitchBendFactor = 1;
float lastLfoSample = 0;
public PreOscillator(Synth synth)
{
super(synth);
frequency = 7;
updateIncrement();
}
public void setVibratoAmount(final int amount)
{
synth.getAudioOutput().interruptTransmitter(this, new VoiceInterrupt() {
public void doInterrupt() {
PreOscillator.this.amount = amount;
}
});
}
/* (non-Javadoc)
* @see com.petersalomonsen.mystudio.mysynth.Oscillator#updateIncrement()
*/
protected void updateIncrement() {
increment = (float) ((float)(2.0 * Math.PI * frequency )/ (float)sampleRate);
}
public final float[] getLfoBuffer()
{
return lfoBuffer;
}
public void setVibratoFrequency(final float frequency)
{
synth.getAudioOutput().interruptTransmitter(this, new VoiceInterrupt() {
public void doInterrupt() {
PreOscillator.this.frequency = frequency;
updateIncrement();
}
});
}
/* (non-Javadoc)
* @see com.petersalomonsen.mystudio.audio.IAudioOutputGenerator#fillBuffer(int, int, float[])
*/
public void fillBuffer(int startBufferPos, int endBufferPos, float[] buffer) {
if(sampleBuffer==null || sampleBuffer.length != buffer.length)
{
lfoBuffer = new float[buffer.length / 2];
sampleBuffer = new float[buffer.length];
}
for(int n=(startBufferPos/2);(n<endBufferPos/2);n++)
{
if(amount!=0)
lfoBuffer[n] = PitchCents.getPitchCent((int)(Sinus.getSin(position+=increment)*amount)) * pitchBendFactor;
else
lfoBuffer[n] = pitchBendFactor;
sampleBuffer[n*2]=0;
sampleBuffer[n*2+1]=0;
}
}
/**
* @return
*/
public final int getAmount() {
return amount;
}
}