WaveBigEndian.java

/*
 * Copyright (c) 2006, 2016, 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.
 */

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;

/**
 * @test
 * @bug 5001952
 * @summary Writing WAVE with big endian data produces corrupt file. WAVE should
 *          always write signed 16-bit, little endian, regardless of the
 *          endianness of the input data.
 */
public class WaveBigEndian {

    static boolean failed = false;

    public static byte[] writeDataAndGetAIS(boolean bigEndian) throws Exception {
        if (bigEndian) {
                out("Create WAVE file from big endian data...");
        } else {
                out("Create WAVE file from little endian data...");
        }
        byte[] data = new byte[3000];
        for (int i = 0; i < data.length; i+=2) {
                if (bigEndian) {
                        data[i] = (byte) i;
                        data[i+1] = (byte) (i+1);
                } else {
                        data[i] = (byte) (i+1);
                        data[i+1] = (byte) i;
                }
        }
        AudioFormat format = new AudioFormat(44100.0f, 16, 1, true, bigEndian);
        InputStream is = new ByteArrayInputStream(data);
        AudioInputStream ais = new AudioInputStream(is, format, data.length);
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        int written = AudioSystem.write(ais, AudioFileFormat.Type.WAVE, os);
        data = os.toByteArray();
        out("Wrote "+written+" bytes, got "+data.length+" bytes in written file.");
        is = new ByteArrayInputStream(data);
        ais = AudioSystem.getAudioInputStream(is);
        out("Got AIS with length = "+ais.getFrameLength()+" frames.");
        return data;
    }


    public static void main(String args[]) throws Exception {
        byte[] data1 = writeDataAndGetAIS(false);
        byte[] data2 = writeDataAndGetAIS(true);

        if (data1.length != data2.length) {
                out("# data1.length != data2.length!");
                failed = true;
        } else {
                for (int i = 0 ; i < data1.length; i++) {
                        if (data1[i] != data2[i]) {
                                out("# At index "+i+": le="+(data1[i] & 0xFF)+" be="+(data2[i] & 0xFF)+" !");
                                failed = true;
                        }
                }
        }

        if (failed) throw new Exception("Test FAILED!");
        out("Files are identical.");
        out("test passed");
    }

    static void out(String s) {
        System.out.println(s);
    }
}