/* * Copyright (c) 2007, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* @test @summary Test SoftPointResampler interpolate method */ import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import javax.sound.sampled.*; import com.sun.media.sound.*; public class Interpolate { private static float getResamplerTestValue(double i) { return (float)Math.sin(i / 10.0); } private static void perfectInterpolation(float[] in_offset, float in_end, float[] startpitch, float pitchstep, float[] out, int[] out_offset, int out_end) { float pitch = startpitch[0]; float ix = in_offset[0]; int ox = out_offset[0]; float ix_end = in_end; int ox_end = out_end; if (pitchstep == 0f) { while (ix < ix_end && ox < ox_end) { out[ox++] = getResamplerTestValue(ix); ix += pitch; } } else { while (ix < ix_end && ox < ox_end) { out[ox++] = getResamplerTestValue(ix); ix += pitch; pitch += pitchstep; } } in_offset[0] = ix; out_offset[0] = ox; startpitch[0] = pitch; } private static float testResampler(SoftAbstractResampler resampler, float p_pitch, float p_pitch2) { float[] testbuffer = new float[4096]; float[] testbuffer2 = new float[1024]; float[] testbuffer3 = new float[1024]; for (int i = 0; i < testbuffer.length; i++) testbuffer[i] = getResamplerTestValue(i); int pads = resampler.getPadding(); float pitchstep = (p_pitch2 - p_pitch)/1024f; int[] out_offset2 = {0}; int[] out_offset3 = {0}; resampler.interpolate(testbuffer, new float[] {pads}, testbuffer.length - pads, new float[] {p_pitch}, pitchstep, testbuffer2, out_offset2, testbuffer2.length); perfectInterpolation(new float[] {pads}, testbuffer.length - pads, new float[] {p_pitch}, pitchstep, testbuffer3, out_offset3, testbuffer3.length); int out_off = out_offset2[0]; if(out_offset3[0] < out_off) out_off = out_offset3[0]; float ac_error = 0; int counter = 0; for (int i = pads; i < out_off; i++) { ac_error += Math.abs(testbuffer2[i] - testbuffer3[i]); counter++; } return ac_error / ((float)counter); } private static void fail(String error) throws Exception { throw new RuntimeException(error); } public static void main(String[] args) throws Exception { SoftPointResampler resampler = new SoftPointResampler(); float max = testResampler(resampler, 0.3f, 0.3f); if(max > 0.2) fail("Interpolation failed, error="+max); max = testResampler(resampler, 0.3f, 0.01f); if(max > 0.2) fail("Interpolation failed, error="+max); max = testResampler(resampler, 1.0f, 0.00f); if(max > 0.2) fail("Interpolation failed, error="+max); } }