1 /*
   2  * Copyright (c) 2007, 2013, 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 package com.sun.media.sound;
  26 
  27 /**
  28  * A resampler that uses 0-order (nearest-neighbor) interpolation.
  29  *
  30  * @author Karl Helgason
  31  */
  32 public final class SoftPointResampler extends SoftAbstractResampler {
  33 
  34     public int getPadding() {
  35         return 100;
  36     }
  37 
  38     public void interpolate(float[] in, float[] in_offset, float in_end,
  39             float[] startpitch, float pitchstep, float[] out, int[] out_offset,
  40             int out_end) {
  41         float pitch = startpitch[0];
  42         float ix = in_offset[0];
  43         int ox = out_offset[0];
  44         float ix_end = in_end;
  45         float ox_end = out_end;
  46         if (pitchstep == 0) {
  47             while (ix < ix_end && ox < ox_end) {
  48                 out[ox++] = in[(int) ix];
  49                 ix += pitch;
  50             }
  51         } else {
  52             while (ix < ix_end && ox < ox_end) {
  53                 out[ox++] = in[(int) ix];
  54                 ix += pitch;
  55                 pitch += pitchstep;
  56             }
  57         }
  58         in_offset[0] = ix;
  59         out_offset[0] = ox;
  60         startpitch[0] = pitch;
  61 
  62     }
  63 }