UlawCodecTest.java

/*
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 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.restcomm.media.codec.g711.ulaw;

import org.restcomm.media.codec.g711.ulaw.Decoder;
import org.restcomm.media.codec.g711.ulaw.Encoder;
import org.restcomm.media.spi.memory.Frame;
import org.restcomm.media.spi.memory.Memory;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;

/**
 *
 * @author Oleg Kulikov
 */
public class UlawCodecTest  {

    private Frame buffer = Memory.allocate(512);
    private static short muLawDecompressTable[] = new short[]{
        -32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
        -23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
        -15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
        -11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
        -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
        -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
        -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
        -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
        -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
        -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
        -876, -844, -812, -780, -748, -716, -684, -652,
        -620, -588, -556, -524, -492, -460, -428, -396,
        -372, -356, -340, -324, -308, -292, -276, -260,
        -244, -228, -212, -196, -180, -164, -148, -132,
        -120, -112, -104, -96, -88, -80, -72, -64,
        -56, -48, -40, -32, -24, -16, -8, 0,
        32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
        23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
        15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
        11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
        7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
        5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
        3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
        2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
        1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
        1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
        876, 844, 812, 780, 748, 716, 684, 652,
        620, 588, 556, 524, 492, 460, 428, 396,
        372, 356, 340, 324, 308, 292, 276, 260,
        244, 228, 212, 196, 180, 164, 148, 132,
        120, 112, 104, 96, 88, 80, 72, 64,
        56, 48, 40, 32, 24, 16, 8, 0
    };
    
    private byte[] src = new byte[512];
    
    public UlawCodecTest() {
    }            

    @BeforeClass
    public static void setUpClass() throws Exception {
    }

    @AfterClass
    public static void tearDownClass() throws Exception {
    }

    @Before
    public void setUp() {
        int k = 0;
        int l = 0;
        byte[] src1 = buffer.getData();
        for (int i = 0; i < 256; i++) {
            short s = muLawDecompressTable[i];
            src[k++] = (byte)(s);
            src[k++] = (byte)(s >> 8);

            src1[l++] = (byte)(s);
            src1[l++] = (byte)(s >> 8);
        }
        buffer.setLength(512);
    }

    @After
    public void tearDown() {
    }
    
    /**
     * Test of process method, of class Decoder.
     */
    @Test
    public void testCodec() {
        
        org.restcomm.media.spi.dsp.Codec compressor = new Encoder();
        compressor.process(buffer);

        org.restcomm.media.spi.dsp.Codec decompressor = new Decoder();
        decompressor.process(buffer);
        
        byte[] res = buffer.getData();
        for (int i = 0; i < src.length; i++) {
            if (src[i] != res[i]) {
                fail("mismatch found at " + i);
            }
        }
    }
}