Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 AudioUtils.java
 Copyright (c) 2015 NTT DOCOMO,INC.
 Released under the MIT license
 http://opensource.org/licenses/mit-license.php
 */

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

public class Main {
    /**
     * Convert from singed 16-bit PCM to 32-bit float PCM.
     * @param byteArray byte array
     * @return byte array
     */
    public static byte[] convert16BitTo32Bit(final byte[] byteArray) {
        float[] audioDataF = shortToFloat(byteToShort(byteArray));
        for (int i = 0; i < audioDataF.length; i++) {
            audioDataF[i] /= 32768.0;
        }

        FloatBuffer fb = FloatBuffer.wrap(audioDataF);
        ByteBuffer byteBuffer = ByteBuffer.allocate(fb.capacity() * 4);
        byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
        byteBuffer.asFloatBuffer().put(fb);
        return byteBuffer.array();
    }

    /**
     * Convert from array of short to array of float.
     * @param shortArray short array
     * @return float array
     */
    public static float[] shortToFloat(final short[] shortArray) {
        float[] floatOut = new float[shortArray.length];
        for (int i = 0; i < shortArray.length; i++) {
            floatOut[i] = shortArray[i];
        }
        return floatOut;
    }

    /**
     * Convert from array of byte to array of short.
     * @param byteArray byte array
     * @return short array
     */
    public static short[] byteToShort(final byte[] byteArray) {
        short[] shortOut = new short[byteArray.length / 2];
        ByteBuffer byteBuffer = ByteBuffer.wrap(byteArray);
        byteBuffer.order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shortOut);
        return shortOut;
    }
}