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/* @test
@summary Test ModelByteBufferWavetable set8BitExtensionBuffer method */
import java.io.ByteArrayOutputStream;
import javax.sound.sampled.*;
import com.sun.media.sound.*;
public class Set8BitExtensionBuffer {
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());
}
static float compare(float[] a, float[] b)
{
float ac_error = 0;
int counter = 0;
for (int i = 0; i < a.length; i++) {
ac_error += Math.abs(a[i] - b[i]);
counter++;
}
return ac_error / ((float)counter);
}
public static void main(String[] args) throws Exception {
setUp();
ModelByteBufferWavetable wavetable = new ModelByteBufferWavetable(buffer16_8,format,10f);
float[] f1 = new float[testarray.length];
float[] f2 = new float[testarray.length];
wavetable.openStream().read(f1);
wavetable.set8BitExtensionBuffer(buffer8);
if(wavetable.get8BitExtensionBuffer() != buffer8)
throw new RuntimeException("wavetable.get8BitExtensionBuffer() incorrect!");
wavetable.openStream().read(f2);
// f2 should have more accurity than f1,
// about 256 times more, or 8 bits
float spec1 = compare(f1, testarray);
float spec2 = compare(f2, testarray);
if((spec1/spec2) <= 200)
throw new RuntimeException("(spec1/spec2) <= 200!");
}
}