Java example source code file (GetLoopLength.java)

This example Java source code file (GetLoopLength.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

audio, audioformat, audioinputstream, bytearrayoutputstream, getlooplength, modelbytebuffer, modelbytebufferwavetable, runtimeexception, sound

The GetLoopLength.java Java example source code

/*
 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. 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.
 *
 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
   @summary Test ModelByteBufferWavetable getLoopLength method */

import java.io.ByteArrayOutputStream;

import javax.sound.sampled.*;

import com.sun.media.sound.*;

public class GetLoopLength {

    static float[] testarray;
    static byte[] test_byte_array;
    static byte[] test_byte_array_8ext;
    static AudioFormat format = new AudioFormat(44100, 16, 1, true, false);
    static AudioFormat format24 = new AudioFormat(44100, 24, 1, true, false);
    static ModelByteBuffer buffer;
    static ModelByteBuffer buffer_wave;
    static ModelByteBuffer buffer8;
    static ModelByteBuffer buffer16_8;
    static ModelByteBuffer buffer24;

    static void setUp() throws Exception {
        testarray = new float[1024];
        for (int i = 0; i < 1024; i++) {
            double ii = i / 1024.0;
            ii = ii * ii;
            testarray[i] = (float)Math.sin(10*ii*2*Math.PI);
            testarray[i] += (float)Math.sin(1.731 + 2*ii*2*Math.PI);
            testarray[i] += (float)Math.sin(0.231 + 6.3*ii*2*Math.PI);
            testarray[i] *= 0.3;
        }
        test_byte_array = new byte[testarray.length*2];
        AudioFloatConverter.getConverter(format).toByteArray(testarray, test_byte_array);
        buffer = new ModelByteBuffer(test_byte_array);

        byte[] test_byte_array2 = new byte[testarray.length*3];
        buffer24 = new ModelByteBuffer(test_byte_array2);
        test_byte_array_8ext = new byte[testarray.length];
        byte[] test_byte_array_8_16 = new byte[testarray.length*2];
        AudioFloatConverter.getConverter(format24).toByteArray(testarray, test_byte_array2);
        int ix = 0;
        int x = 0;
        for (int i = 0; i < test_byte_array_8ext.length; i++) {
            test_byte_array_8ext[i] = test_byte_array2[ix++];
            test_byte_array_8_16[x++] = test_byte_array2[ix++];
            test_byte_array_8_16[x++] = test_byte_array2[ix++];
        }
        buffer16_8 = new ModelByteBuffer(test_byte_array_8_16);
        buffer8 = new ModelByteBuffer(test_byte_array_8ext);

        AudioInputStream ais = new AudioInputStream(buffer.getInputStream(), format, testarray.length);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        AudioSystem.write(ais, AudioFileFormat.Type.WAVE, baos);
        buffer_wave = new ModelByteBuffer(baos.toByteArray());
    }

    public static void main(String[] args) throws Exception {

        setUp();

        ModelByteBufferWavetable wavetable = new ModelByteBufferWavetable(buffer,format);
        wavetable.setLoopLength(10f);
        if(wavetable.getLoopLength() != 10f)
            throw new RuntimeException("wavetable.getLoopLength() not 10!");
        wavetable.setLoopLength(20f);
        if(wavetable.getLoopLength() != 20f)
            throw new RuntimeException("wavetable.getLoopLength() not 20!");
    }

}