1 /* 2 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* @test 27 @summary Test SoftPointResampler interpolate method */ 28 29 import java.io.File; 30 import java.io.FileOutputStream; 31 import java.io.IOException; 32 33 import javax.sound.sampled.*; 34 35 import com.sun.media.sound.*; 36 37 public class Interpolate { 38 39 private static float getResamplerTestValue(double i) 40 { 41 return (float)Math.sin(i / 10.0); 42 } 43 44 private static void perfectInterpolation(float[] in_offset, float in_end, 45 float[] startpitch, float pitchstep, float[] out, int[] out_offset, 46 int out_end) { 47 48 float pitch = startpitch[0]; 49 float ix = in_offset[0]; 50 int ox = out_offset[0]; 51 float ix_end = in_end; 52 int ox_end = out_end; 53 if (pitchstep == 0f) { 54 while (ix < ix_end && ox < ox_end) { 55 out[ox++] = getResamplerTestValue(ix); 56 ix += pitch; 57 } 58 } else { 59 while (ix < ix_end && ox < ox_end) { 60 out[ox++] = getResamplerTestValue(ix); 61 ix += pitch; 62 pitch += pitchstep; 63 } 64 } 65 in_offset[0] = ix; 66 out_offset[0] = ox; 67 startpitch[0] = pitch; 68 69 } 70 71 private static float testResampler(SoftAbstractResampler resampler, float p_pitch, float p_pitch2) 72 { 73 float[] testbuffer = new float[4096]; 74 float[] testbuffer2 = new float[1024]; 75 float[] testbuffer3 = new float[1024]; 76 for (int i = 0; i < testbuffer.length; i++) 77 testbuffer[i] = getResamplerTestValue(i); 78 int pads = resampler.getPadding(); 79 float pitchstep = (p_pitch2 - p_pitch)/1024f; 80 int[] out_offset2 = {0}; 81 int[] out_offset3 = {0}; 82 resampler.interpolate(testbuffer, new float[] {pads}, testbuffer.length - pads, new float[] {p_pitch}, pitchstep, testbuffer2, out_offset2, testbuffer2.length); 83 perfectInterpolation(new float[] {pads}, testbuffer.length - pads, new float[] {p_pitch}, pitchstep, testbuffer3, out_offset3, testbuffer3.length); 84 int out_off = out_offset2[0]; 85 if(out_offset3[0] < out_off) 86 out_off = out_offset3[0]; 87 float ac_error = 0; 88 int counter = 0; 89 for (int i = pads; i < out_off; i++) { 90 ac_error += Math.abs(testbuffer2[i] - testbuffer3[i]); 91 counter++; 92 } 93 return ac_error / ((float)counter); 94 } 95 96 private static void fail(String error) throws Exception 97 { 98 throw new RuntimeException(error); 99 } 100 101 public static void main(String[] args) throws Exception { 102 SoftPointResampler resampler = new SoftPointResampler(); 103 float max = testResampler(resampler, 0.3f, 0.3f); 104 if(max > 0.2) 105 fail("Interpolation failed, error="+max); 106 max = testResampler(resampler, 0.3f, 0.01f); 107 if(max > 0.2) 108 fail("Interpolation failed, error="+max); 109 max = testResampler(resampler, 1.0f, 0.00f); 110 if(max > 0.2) 111 fail("Interpolation failed, error="+max); 112 } 113 } 114