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/*
* Copyright 2010 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.unitgen;
import com.jsyn.ports.UnitInputPort;
/**
* This can be used to block the execution of upstream units. It can be placed at the output of a
* circuit and driven with an amplitude envelope.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class EnablingGate extends UnitFilter {
public UnitInputPort gate;
/* Define Unit Ports used by connect() and set(). */
public EnablingGate() {
super();
addPort(gate = new UnitInputPort("Gate"));
}
@Override
public void generate(int start, int limit) {
double[] aValues = input.getValues();
double[] bValues = gate.getValues();
double[] outputs = output.getValues();
for (int i = start; i < limit; i++) {
outputs[i] = aValues[i] * bValues[i];
}
// If we end up at zero then disable pulling of data.
// We do this at the end so that envelope can get started.
if (outputs[limit - 1] <= 0.0) {
setEnabled(false);
}
}
}
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