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1 /* | 1 /* |
2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 */ | 23 */ |
24 | 24 |
25 #ifndef PannerNode_h | 25 #ifndef PannerNode_h |
26 #define PannerNode_h | 26 #define PannerNode_h |
27 | 27 |
28 #include "platform/audio/AudioBus.h" | 28 #include "platform/audio/AudioBus.h" |
29 #include "platform/audio/Cone.h" | 29 #include "platform/audio/Cone.h" |
30 #include "platform/audio/Distance.h" | 30 #include "platform/audio/Distance.h" |
31 #include "platform/audio/HRTFDatabaseLoader.h" | |
32 #include "platform/audio/Panner.h" | 31 #include "platform/audio/Panner.h" |
33 #include "modules/webaudio/AudioListener.h" | 32 #include "modules/webaudio/AudioListener.h" |
34 #include "modules/webaudio/AudioNode.h" | 33 #include "modules/webaudio/AudioNode.h" |
35 #include "platform/geometry/FloatPoint3D.h" | 34 #include "platform/geometry/FloatPoint3D.h" |
36 #include "wtf/HashMap.h" | 35 #include "wtf/HashMap.h" |
37 #include "wtf/OwnPtr.h" | 36 #include "wtf/OwnPtr.h" |
38 | 37 |
39 namespace WebCore { | 38 namespace WebCore { |
40 | 39 |
| 40 class HRTFDatabaseLoader; |
| 41 |
41 // PannerNode is an AudioNode with one input and one output. | 42 // PannerNode is an AudioNode with one input and one output. |
42 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. | 43 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. |
43 // It has a position and an orientation in 3D space which is relative to the pos
ition and orientation of the context's AudioListener. | 44 // It has a position and an orientation in 3D space which is relative to the pos
ition and orientation of the context's AudioListener. |
44 // A distance effect will attenuate the gain as the position moves away from the
listener. | 45 // A distance effect will attenuate the gain as the position moves away from the
listener. |
45 // A cone effect will attenuate the gain as the orientation moves away from the
listener. | 46 // A cone effect will attenuate the gain as the orientation moves away from the
listener. |
46 // All of these effects follow the OpenAL specification very closely. | 47 // All of these effects follow the OpenAL specification very closely. |
47 | 48 |
48 class PannerNode FINAL : public AudioNode { | 49 class PannerNode FINAL : public AudioNode { |
49 public: | 50 public: |
50 // These enums are used to distinguish what cached values of panner are dirt
y. | 51 // These enums are used to distinguish what cached values of panner are dirt
y. |
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105 double dopplerRate(); | 106 double dopplerRate(); |
106 | 107 |
107 virtual double tailTime() const OVERRIDE { return m_panner ? m_panner->tailT
ime() : 0; } | 108 virtual double tailTime() const OVERRIDE { return m_panner ? m_panner->tailT
ime() : 0; } |
108 virtual double latencyTime() const OVERRIDE { return m_panner ? m_panner->la
tencyTime() : 0; } | 109 virtual double latencyTime() const OVERRIDE { return m_panner ? m_panner->la
tencyTime() : 0; } |
109 | 110 |
110 private: | 111 private: |
111 PannerNode(AudioContext*, float sampleRate); | 112 PannerNode(AudioContext*, float sampleRate); |
112 | 113 |
113 // AudioContext's listener | 114 // AudioContext's listener |
114 AudioListener* listener(); | 115 AudioListener* listener(); |
| 116 HRTFDatabaseLoader* hrtfDatabaseLoader() { return listener()->hrtfDatabaseLo
ader(); } |
115 | 117 |
116 bool setPanningModel(unsigned); // Returns true on success. | 118 bool setPanningModel(unsigned); // Returns true on success. |
117 bool setDistanceModel(unsigned); // Returns true on success. | 119 bool setDistanceModel(unsigned); // Returns true on success. |
118 | 120 |
119 void calculateAzimuthElevation(double* outAzimuth, double* outElevation); | 121 void calculateAzimuthElevation(double* outAzimuth, double* outElevation); |
120 float calculateDistanceConeGain(); // Returns the combined distance and cone
gain attenuation. | 122 float calculateDistanceConeGain(); // Returns the combined distance and cone
gain attenuation. |
121 double calculateDopplerRate(); | 123 double calculateDopplerRate(); |
122 | 124 |
123 void azimuthElevation(double* outAzimuth, double* outElevation); | 125 void azimuthElevation(double* outAzimuth, double* outElevation); |
124 float distanceConeGain(); | 126 float distanceConeGain(); |
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148 DistanceEffect m_distanceEffect; | 150 DistanceEffect m_distanceEffect; |
149 ConeEffect m_coneEffect; | 151 ConeEffect m_coneEffect; |
150 float m_lastGain; | 152 float m_lastGain; |
151 | 153 |
152 // Cached values | 154 // Cached values |
153 double m_cachedAzimuth; | 155 double m_cachedAzimuth; |
154 double m_cachedElevation; | 156 double m_cachedElevation; |
155 float m_cachedDistanceConeGain; | 157 float m_cachedDistanceConeGain; |
156 double m_cachedDopplerRate; | 158 double m_cachedDopplerRate; |
157 | 159 |
158 RefPtr<HRTFDatabaseLoader> m_hrtfDatabaseLoader; | |
159 | |
160 // AudioContext's connection count | 160 // AudioContext's connection count |
161 unsigned m_connectionCount; | 161 unsigned m_connectionCount; |
162 | 162 |
163 // Synchronize process() with setting of the panning model, source's locatio
n information, listener, distance parameters and sound cones. | 163 // Synchronize process() with setting of the panning model, source's locatio
n information, listener, distance parameters and sound cones. |
164 mutable Mutex m_processLock; | 164 mutable Mutex m_processLock; |
165 }; | 165 }; |
166 | 166 |
167 } // namespace WebCore | 167 } // namespace WebCore |
168 | 168 |
169 #endif // PannerNode_h | 169 #endif // PannerNode_h |
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