author | amenkov |
Mon, 28 Feb 2011 18:36:33 +0300 | |
changeset 8525 | 08f98f5a11df |
parent 5506 | 202f599c92aa |
child 18215 | b2afd66ce6db |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
|
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* questions. |
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*/ |
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package com.sun.media.sound; |
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|
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/** |
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* A standard transformer used in connection blocks. |
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* It expects input values to be between 0 and 1. |
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* |
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* The result of the transform is |
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* between 0 and 1 if polarity = unipolar and |
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* between -1 and 1 if polarity = bipolar. |
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* |
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* These constraints only applies to Concave, Convex and Switch transforms. |
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* |
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* @author Karl Helgason |
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*/ |
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public class ModelStandardTransform implements ModelTransform { |
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public static final boolean DIRECTION_MIN2MAX = false; |
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public static final boolean DIRECTION_MAX2MIN = true; |
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public static final boolean POLARITY_UNIPOLAR = false; |
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public static final boolean POLARITY_BIPOLAR = true; |
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public static final int TRANSFORM_LINEAR = 0; |
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// concave: output = (20*log10(127^2/value^2)) / 96 |
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public static final int TRANSFORM_CONCAVE = 1; |
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// convex: same as concave except that start and end point are reversed. |
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public static final int TRANSFORM_CONVEX = 2; |
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// switch: if value > avg(max,min) then max else min |
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public static final int TRANSFORM_SWITCH = 3; |
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public static final int TRANSFORM_ABSOLUTE = 4; |
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private boolean direction = DIRECTION_MIN2MAX; |
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private boolean polarity = POLARITY_UNIPOLAR; |
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private int transform = TRANSFORM_LINEAR; |
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|
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public ModelStandardTransform() { |
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} |
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public ModelStandardTransform(boolean direction) { |
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this.direction = direction; |
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} |
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public ModelStandardTransform(boolean direction, boolean polarity) { |
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this.direction = direction; |
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this.polarity = polarity; |
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} |
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public ModelStandardTransform(boolean direction, boolean polarity, |
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int transform) { |
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this.direction = direction; |
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this.polarity = polarity; |
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this.transform = transform; |
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} |
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public double transform(double value) { |
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double s; |
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double a; |
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if (direction == DIRECTION_MAX2MIN) |
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value = 1.0 - value; |
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if (polarity == POLARITY_BIPOLAR) |
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value = value * 2.0 - 1.0; |
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switch (transform) { |
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case TRANSFORM_CONCAVE: |
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s = Math.signum(value); |
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a = Math.abs(value); |
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a = -((5.0 / 12.0) / Math.log(10)) * Math.log(1.0 - a); |
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if (a < 0) |
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a = 0; |
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else if (a > 1) |
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a = 1; |
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return s * a; |
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case TRANSFORM_CONVEX: |
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s = Math.signum(value); |
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a = Math.abs(value); |
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a = 1.0 + ((5.0 / 12.0) / Math.log(10)) * Math.log(a); |
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if (a < 0) |
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a = 0; |
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else if (a > 1) |
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a = 1; |
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return s * a; |
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case TRANSFORM_SWITCH: |
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if (polarity == POLARITY_BIPOLAR) |
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return (value > 0) ? 1 : -1; |
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else |
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return (value > 0.5) ? 1 : 0; |
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case TRANSFORM_ABSOLUTE: |
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return Math.abs(value); |
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default: |
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break; |
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} |
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|
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return value; |
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} |
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public boolean getDirection() { |
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return direction; |
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} |
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public void setDirection(boolean direction) { |
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this.direction = direction; |
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} |
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public boolean getPolarity() { |
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return polarity; |
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} |
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public void setPolarity(boolean polarity) { |
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this.polarity = polarity; |
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} |
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public int getTransform() { |
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return transform; |
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} |
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|
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public void setTransform(int transform) { |
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this.transform = transform; |
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} |
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} |