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| 1 /* | |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 14 * its contributors may be used to endorse or promote products derived | |
| 15 * from this software without specific prior written permission. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef Distance_h | |
| 30 #define Distance_h | |
| 31 | |
| 32 #include "platform/PlatformExport.h" | |
| 33 #include "platform/wtf/Allocator.h" | |
| 34 #include "platform/wtf/build_config.h" | |
| 35 | |
| 36 namespace blink { | |
| 37 | |
| 38 // Distance models are defined according to the OpenAL specification: | |
| 39 // http://connect.creativelabs.com/openal/Documentation/OpenAL%201.1%20Specifica
tion.htm. | |
| 40 | |
| 41 class PLATFORM_EXPORT DistanceEffect { | |
| 42 DISALLOW_NEW(); | |
| 43 | |
| 44 public: | |
| 45 enum ModelType { kModelLinear = 0, kModelInverse = 1, kModelExponential = 2 }; | |
| 46 | |
| 47 DistanceEffect(); | |
| 48 | |
| 49 // Returns scalar gain for the given distance the current distance model is | |
| 50 // used | |
| 51 double Gain(double distance); | |
| 52 | |
| 53 ModelType Model() { return model_; } | |
| 54 | |
| 55 void SetModel(ModelType model) { model_ = model; } | |
| 56 | |
| 57 // Distance params | |
| 58 void SetRefDistance(double ref_distance) { ref_distance_ = ref_distance; } | |
| 59 void SetMaxDistance(double max_distance) { max_distance_ = max_distance; } | |
| 60 void SetRolloffFactor(double rolloff_factor) { | |
| 61 rolloff_factor_ = rolloff_factor; | |
| 62 } | |
| 63 | |
| 64 double RefDistance() const { return ref_distance_; } | |
| 65 double MaxDistance() const { return max_distance_; } | |
| 66 double RolloffFactor() const { return rolloff_factor_; } | |
| 67 | |
| 68 protected: | |
| 69 double LinearGain(double distance); | |
| 70 double InverseGain(double distance); | |
| 71 double ExponentialGain(double distance); | |
| 72 | |
| 73 ModelType model_; | |
| 74 double ref_distance_; | |
| 75 double max_distance_; | |
| 76 double rolloff_factor_; | |
| 77 }; | |
| 78 | |
| 79 } // namespace blink | |
| 80 | |
| 81 #endif // Distance_h | |
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Chromium Code Reviews
Issue 2864383002:
Rename Distance.* file to DistanceEffect.* (Closed)
