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/*
* Copyright (c) 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.util.Arrays;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
import com.sun.media.sound.AudioFloatConverter;
import static javax.sound.sampled.AudioFormat.Encoding.PCM_SIGNED;
import static javax.sound.sampled.AudioFormat.Encoding.PCM_UNSIGNED;
/**
* @test
* @bug 8152501
* @modules java.desktop/com.sun.media.sound
*/
public final class Bits32ToFromFloatArray {
private static final int SIZE = 32;
private static final float[] FLOATS = {-1.0f, 0, 1.0f};
private static int MID_U = (int) (Integer.MAX_VALUE + 1);
private static int MAX_U = -1;
// BIG ENDIAN
private static final byte[] SIGNED_BIG = {
(byte) ((Integer.MIN_VALUE >> 24) & 0xff),
(byte) ((Integer.MIN_VALUE >> 16) & 0xff),
(byte) ((Integer.MIN_VALUE >> 8) & 0xff),
(byte) ((Integer.MIN_VALUE >> 0) & 0xff),
0, 0, 0, 0,
(byte) ((Integer.MAX_VALUE >> 24) & 0xff),
(byte) ((Integer.MAX_VALUE >> 16) & 0xff),
(byte) ((Integer.MAX_VALUE >> 8) & 0xff),
(byte) ((Integer.MAX_VALUE >> 0) & 0xff),
};
private static final byte[] UNSIGNED_BIG = {
0, 0, 0, 0,
(byte) ((MID_U >> 24) & 0xff),
(byte) ((MID_U >> 16) & 0xff),
(byte) ((MID_U >> 8) & 0xff),
(byte) ((MID_U >> 0) & 0xff),
(byte) ((MAX_U >> 24) & 0xff),
(byte) ((MAX_U >> 16) & 0xff),
(byte) ((MAX_U >> 8) & 0xff),
(byte) ((MAX_U >> 0) & 0xff),
};
// LITTLE ENDIAN
private static final byte[] SIGNED_LITTLE = {
(byte) ((Integer.MIN_VALUE >> 0) & 0xff),
(byte) ((Integer.MIN_VALUE >> 8) & 0xff),
(byte) ((Integer.MIN_VALUE >> 16) & 0xff),
(byte) ((Integer.MIN_VALUE >> 24) & 0xff),
0, 0, 0, 0,
(byte) ((Integer.MAX_VALUE >> 0) & 0xff),
(byte) ((Integer.MAX_VALUE >> 8) & 0xff),
(byte) ((Integer.MAX_VALUE >> 16) & 0xff),
(byte) ((Integer.MAX_VALUE >> 24) & 0xff),
};
private static final byte[] UNSIGNED_LITTLE = {
0, 0, 0, 0,
(byte) ((MID_U >> 0) & 0xff),
(byte) ((MID_U >> 8) & 0xff),
(byte) ((MID_U >> 16) & 0xff),
(byte) ((MID_U >> 24) & 0xff),
(byte) ((MAX_U >> 0) & 0xff),
(byte) ((MAX_U >> 8) & 0xff),
(byte) ((MAX_U >> 16) & 0xff),
(byte) ((MAX_U >> 24) & 0xff),
};
public static void main(final String[] args) {
test(PCM_UNSIGNED, UNSIGNED_BIG, true);
test(PCM_UNSIGNED, UNSIGNED_LITTLE, false);
test(PCM_SIGNED, SIGNED_LITTLE, false);
test(PCM_SIGNED, SIGNED_BIG, true);
}
private static void test(final Encoding enc, final byte[] expected,
boolean end) {
AudioFormat af = new AudioFormat(enc, 44100, SIZE, 1, SIZE / 8, 44100,
end);
byte[] bytes = new byte[FLOATS.length * af.getFrameSize()];
AudioFloatConverter conv = AudioFloatConverter.getConverter(af);
conv.toByteArray(FLOATS, bytes);
if (!Arrays.equals(bytes, expected)) {
System.err.println("Actual: " + Arrays.toString(bytes));
System.err.println("Expected: " + Arrays.toString(expected));
throw new RuntimeException();
}
float[] floats = new float[bytes.length / af.getFrameSize()];
conv.toFloatArray(bytes, floats);
if (!Arrays.equals(floats, FLOATS)) {
System.err.println("Actual: " + Arrays.toString(floats));
System.err.println("Expected: " + Arrays.toString(FLOATS));
throw new RuntimeException();
}
}
}
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