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 
  26 package com.sun.media.sound;
  27 
  28 /**
  29  * A resampler that uses 0-order (nearest-neighbor) interpolation.
  30  *
  31  * @author Karl Helgason
  32  */
  33 public final class SoftPointResampler extends SoftAbstractResampler {
  34 
  35     @Override
  36     public int getPadding() {
  37         return 100;
  38     }
  39 
  40     @Override
  41     public void interpolate(float[] in, float[] in_offset, float in_end,
  42                             float[] startpitch, float pitchstep, float[] out, int[] out_offset,
  43                             int out_end) {
  44         float pitch = startpitch[0];
  45         float ix = in_offset[0];
  46         int ox = out_offset[0];
  47         float ix_end = in_end;
  48         float ox_end = out_end;
  49         if (pitchstep == 0) {
  50             while (ix < ix_end && ox < ox_end) {
  51                 out[ox++] = in[(int) ix];
  52                 ix += pitch;
  53             }
  54         } else {
  55             while (ix < ix_end && ox < ox_end) {
  56                 out[ox++] = in[(int) ix];
  57                 ix += pitch;
  58                 pitch += pitchstep;
  59             }
  60         }
  61         in_offset[0] = ix;
  62         out_offset[0] = ox;
  63         startpitch[0] = pitch;
  64     }
  65 }