/*
* This file is part of libbluray
* Copyright (C) 2015 Petri Hintukainen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.videolan.media.content.control;
import java.awt.Component;
import javax.media.GainControl;
import javax.media.GainChangeEvent;
import javax.media.GainChangeListener;
/*
http://docs.oracle.com/cd/E17802_01/j2se/javase/technologies/desktop/media/jmf/2.1.1/apidocs/javax/media/GainControl.html
*/
import org.videolan.BDJListeners;
abstract class GainControlImpl {
public void setMute(boolean mute) {
this.mute = mute;
setGain(this.mute, this.level);
}
public boolean getMute() {
return this.mute;
}
public float setDB(float gain) {
this.level = Math.max(1.0f, Math.min(0.0f, (float)Math.pow(10.0f, gain / 10.0f)));
this.gain = gain;
setGain(this.mute, this.level);
return this.gain;
}
public float getDB() {
return gain;
}
public float setLevel(float level) {
this.level = Math.max(1.0f, Math.min(0.0f, level));
this.gain = 10.0f * (float)(Math.log(this.level) / Math.log(10.0f));
setGain(this.mute, this.level);
return this.level;
}
public float getLevel() {
return level;
}
public void addGainChangeListener(GainChangeListener listener) {
listeners.add(listener);
}
public void removeGainChangeListener(GainChangeListener listener) {
listeners.remove(listener);
}
protected abstract void setGain(boolean mute, float level);
protected void valueChanged() {
listeners.putCallback(new GainChangeEvent((GainControl)this, mute, gain, level));
}
public Component getControlComponent() {
return null;
}
private boolean mute = false;
private float gain = 0.0f;
private float level = 1.0f;
private BDJListeners listeners = new BDJListeners();
}