/*
 * Copyright 2007 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/* @test
   @summary Test AudioFloatConverter toFloatArray method */

import javax.sound.sampled.*;

import com.sun.media.sound.*;

public class ToFloatArray {

	public static void main(String[] args) throws Exception {
		
		float[] 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;
		}		
		
		// Check conversion from float2byte and byte2float.
		for (int big = 0; big < 2; big+=1) 
		for (int signed = 0; signed < 2; signed+=1) 
		for (int bits = 8; bits <= 32; bits+=8) {					
			AudioFormat frm = new AudioFormat(44100, bits, 1, signed==1, big==1);
			byte[] buff = new byte[testarray.length * frm.getFrameSize()];
			float[] testarray2 = new float[testarray.length];
			AudioFloatConverter conv = AudioFloatConverter.getConverter(frm);
			conv.toByteArray(testarray, buff);
			conv.toFloatArray(buff, testarray2);
			for (int i = 0; i < testarray2.length; i++) {
				if(Math.abs(testarray[i] - testarray2[i]) > 0.05)
					throw new RuntimeException("Conversion failed for " + frm  +" , arrays not equal enough!\n");
			}				
		}
		
		// Check big/little
		for (int big = 0; big < 2; big+=1) 
		for (int signed = 0; signed < 2; signed+=1)
		for (int bits = 8; bits <= 32; bits+=8) {					
			AudioFormat frm = new AudioFormat(44100, bits, 1, signed==1, big==1);
			byte[] buff = new byte[testarray.length * frm.getFrameSize()];
			AudioFloatConverter conv = AudioFloatConverter.getConverter(frm);
			conv.toByteArray(testarray, buff);
			byte[] buff2 = new byte[testarray.length * frm.getFrameSize()];
			int fs = frm.getFrameSize();
			for (int i = 0; i < buff2.length; i+=fs) {
				for (int j = 0; j < fs; j++) {
					buff2[i+(fs-j-1)] = buff[i+j];
				}
			}
			float[] testarray2 = new float[testarray.length];			
			AudioFormat frm2 = new AudioFormat(44100, bits, 1, signed==1, big==0);
			AudioFloatConverter.getConverter(frm2).toFloatArray(buff2, testarray2);
			for (int i = 0; i < testarray2.length; i++) {
				if(Math.abs(testarray[i] - testarray2[i]) > 0.05)
				{
					throw new RuntimeException("Conversion failed for " + frm  +" to " + frm2 + " , arrays not equal enough!\n");
				}
			}						
		}
		
		// Check signed/unsigned 
		for (int big = 0; big < 2; big+=1) 
		for (int signed = 0; signed < 2; signed+=1)
		for (int bits = 8; bits <= 32; bits+=8) {					
			AudioFormat frm = new AudioFormat(44100, bits, 1, signed==1, big==1);
			byte[] b = new byte[testarray.length * frm.getFrameSize()];
			AudioFloatConverter conv = AudioFloatConverter.getConverter(frm);
			conv.toByteArray(testarray, b);
			int fs = frm.getFrameSize();
			if(big==1)
			{
	            for(int i=0; i < b.length; i+= fs ) 
	                b[i] = (b[i] >= 0) ? (byte)(0x80 | b[i]) : (byte)(0x7F & b[i]);	           
			}
			else
			{
	            for(int i=(0+fs-1); i < b.length; i+= fs ) 
	                b[i] = (b[i] >= 0) ? (byte)(0x80 | b[i]) : (byte)(0x7F & b[i]);	            						
			}
			float[] testarray2 = new float[testarray.length];			
			AudioFormat frm2 = new AudioFormat(44100, bits, 1, signed==0, big==1);
			AudioFloatConverter.getConverter(frm2).toFloatArray(b, testarray2);
			for (int i = 0; i < testarray2.length; i++) {
				if(Math.abs(testarray[i] - testarray2[i]) > 0.05)
				{
					throw new RuntimeException("Conversion failed for " + frm  +" to " + frm2 + " , arrays not equal enough!\n");
				}
			}						
		}
		
		// Check if conversion 32->24, 24->16, 16->8 result in same float data
		AudioFormat frm = new AudioFormat(44100, 32, 1, true, true);
		byte[] b = new byte[testarray.length * frm.getFrameSize()];
		AudioFloatConverter.getConverter(frm).toByteArray(testarray, b);
		for (int bits = 8; bits <= 32; bits+=8) {
			AudioFormat frm2 = new AudioFormat(44100, bits, 1, true, true);
			byte[] b2 = new byte[testarray.length * frm2.getFrameSize()];
			int fs1 = frm.getFrameSize();
			int fs2 = frm2.getFrameSize();
			int ii = 0;
			for (int i = 0; i < b.length; i+=fs1) 
				for (int j = 0; j < fs2; j++) 
					b2[ii++] = b[i+j];			
			float[] testarray2 = new float[testarray.length];
			AudioFloatConverter.getConverter(frm2).toFloatArray(b2, testarray2);
			for (int i = 0; i < testarray2.length; i++) {
				if(Math.abs(testarray[i] - testarray2[i]) > 0.05)
				{
					throw new RuntimeException("Conversion failed for " + frm  +" to " + frm2 + " , arrays not equal enough!\n");
				}
			}					
		}
	}

}