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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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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/Panner.h" | 31 #include "platform/audio/Panner.h" |
32 #include "modules/webaudio/AudioListener.h" | 32 #include "modules/webaudio/AudioListener.h" |
33 #include "modules/webaudio/AudioNode.h" | 33 #include "modules/webaudio/AudioNode.h" |
34 #include "modules/webaudio/AudioParam.h" | 34 #include "modules/webaudio/AudioParam.h" |
35 #include "platform/geometry/FloatPoint3D.h" | 35 #include "platform/geometry/FloatPoint3D.h" |
| 36 #include "wtf/HashMap.h" |
36 #include "wtf/OwnPtr.h" | 37 #include "wtf/OwnPtr.h" |
37 | 38 |
38 namespace WebCore { | 39 namespace WebCore { |
39 | 40 |
40 // PannerNode is an AudioNode with one input and one output. | 41 // PannerNode is an AudioNode with one input and one output. |
41 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. | 42 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. |
42 // It has a position and an orientation in 3D space which is relative to the pos
ition and orientation of the context's AudioListener. | 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. |
43 // A distance effect will attenuate the gain as the position moves away from the
listener. | 44 // A distance effect will attenuate the gain as the position moves away from the
listener. |
44 // A cone effect will attenuate the gain as the orientation moves away from the
listener. | 45 // A cone effect will attenuate the gain as the orientation moves away from the
listener. |
45 // All of these effects follow the OpenAL specification very closely. | 46 // All of these effects follow the OpenAL specification very closely. |
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130 virtual double latencyTime() const OVERRIDE { return m_panner ? m_panner->la
tencyTime() : 0; } | 131 virtual double latencyTime() const OVERRIDE { return m_panner ? m_panner->la
tencyTime() : 0; } |
131 | 132 |
132 private: | 133 private: |
133 PannerNode(AudioContext*, float sampleRate); | 134 PannerNode(AudioContext*, float sampleRate); |
134 | 135 |
135 // Returns the combined distance and cone gain attenuation. | 136 // Returns the combined distance and cone gain attenuation. |
136 float distanceConeGain(); | 137 float distanceConeGain(); |
137 | 138 |
138 // Notifies any AudioBufferSourceNodes connected to us either directly or in
directly about our existence. | 139 // Notifies any AudioBufferSourceNodes connected to us either directly or in
directly about our existence. |
139 // This is in order to handle the pitch change necessary for the doppler shi
ft. | 140 // This is in order to handle the pitch change necessary for the doppler shi
ft. |
140 void notifyAudioSourcesConnectedToNode(AudioNode*); | 141 void notifyAudioSourcesConnectedToNode(AudioNode*, HashMap<AudioNode*, bool>
&visitedNodes); |
141 | 142 |
142 OwnPtr<Panner> m_panner; | 143 OwnPtr<Panner> m_panner; |
143 unsigned m_panningModel; | 144 unsigned m_panningModel; |
144 | 145 |
145 FloatPoint3D m_position; | 146 FloatPoint3D m_position; |
146 FloatPoint3D m_orientation; | 147 FloatPoint3D m_orientation; |
147 FloatPoint3D m_velocity; | 148 FloatPoint3D m_velocity; |
148 | 149 |
149 // Gain | 150 // Gain |
150 RefPtr<AudioParam> m_distanceGain; | 151 RefPtr<AudioParam> m_distanceGain; |
151 RefPtr<AudioParam> m_coneGain; | 152 RefPtr<AudioParam> m_coneGain; |
152 DistanceEffect m_distanceEffect; | 153 DistanceEffect m_distanceEffect; |
153 ConeEffect m_coneEffect; | 154 ConeEffect m_coneEffect; |
154 float m_lastGain; | 155 float m_lastGain; |
155 | 156 |
156 unsigned m_connectionCount; | 157 unsigned m_connectionCount; |
157 | 158 |
158 // Synchronize process() and setPanningModel() which can change the panner. | 159 // Synchronize process() and setPanningModel() which can change the panner. |
159 mutable Mutex m_pannerLock; | 160 mutable Mutex m_pannerLock; |
160 }; | 161 }; |
161 | 162 |
162 } // namespace WebCore | 163 } // namespace WebCore |
163 | 164 |
164 #endif // PannerNode_h | 165 #endif // PannerNode_h |
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