SoftTestUtils.java

/*
 * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

import java.io.IOException;

import javax.sound.midi.*;
import javax.sound.sampled.*;

import com.sun.media.sound.*;

public class SoftTestUtils {
	
	public AudioSynthesizer synth = new SoftSynthesizer();
	public AudioInputStream stream;
	public byte[] tmpbuffer = new byte[1024];
	
	public static SF2Soundbank createTestSoundBank()
	{		
		SF2Soundbank sf2 = new SF2Soundbank();
		AudioFormat format = new AudioFormat(44100, 16, 1, true, false);
		float[] data = new float[44100+1000]; 
		float fr = 440/format.getSampleRate();
		for (int i = 0; i < data.length; i++) 
			data[i] = (float)Math.sin(i*fr*2*Math.PI);		
		byte[] bdata = new byte[data.length*format.getFrameSize()];
		AudioFloatConverter.getConverter(format).toByteArray(data, bdata);				
		SF2Sample sample = new SF2Sample(sf2);
		sample.setName("Test Sample");
		sample.setData(bdata);
		sample.setStartLoop(500);
		sample.setEndLoop(data.length - 500);
		sample.setSampleRate((long) format.getSampleRate());
		sample.setOriginalPitch(69);
		sf2.addResource(sample);
		SF2Layer layer = new SF2Layer(sf2);
		layer.setName("Test Layer");
		sf2.addResource(layer);
		SF2LayerRegion region = new SF2LayerRegion();
		region.putInteger(SF2Region.GENERATOR_SAMPLEMODES, 1);
		region.setSample(sample);
		layer.getRegions().add(region);
		SF2Instrument ins = new SF2Instrument(sf2);
		ins.setName("Test Instrument");
		sf2.addInstrument(ins);
		SF2InstrumentRegion insregion = new SF2InstrumentRegion();
		insregion.setLayer(layer);
		ins.getRegions().add(insregion);
		
		return sf2;
	}
	
	public SoftTestUtils() throws Exception {
		stream = synth.openStream(null, null);		
		synth.unloadAllInstruments(synth.getDefaultSoundbank());
		synth.loadAllInstruments(createTestSoundBank());
	}

	public void close() throws Exception {
		stream.close();
		stream = null;
		synth.close();
		synth = null;		
	}	
	
	public void read(double seconds) throws IOException
	{
		int bufflen = 
		   stream.getFormat().getFrameSize() * 
		   (int)(stream.getFormat().getFrameRate() * seconds);
		while(bufflen != 0)
		{
			if(bufflen > 1024)
				bufflen -= stream.read(tmpbuffer,0,1024);
			else
				bufflen -= stream.read(tmpbuffer,0, bufflen);
		}
	}

	public VoiceStatus findVoice(int channel, int note) {
		VoiceStatus[] v = synth.getVoiceStatus();
		for (int k = 0; k < v.length; k++) 
			if(v[k].active)
				if(v[k].channel == channel)
					if(v[k].note == note)
						return v[k];			
		return null;
	}

}