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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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| 38 | 38 |
| 39 namespace WebCore { | 39 namespace WebCore { |
| 40 | 40 |
| 41 // PannerNode is an AudioNode with one input and one output. | 41 // 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. | 42 // 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. | 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 // 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. |
| 45 // 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. |
| 46 // All of these effects follow the OpenAL specification very closely. | 46 // All of these effects follow the OpenAL specification very closely. |
| 47 | 47 |
| 48 class PannerNode : public AudioNode { | 48 class PannerNode FINAL : public AudioNode { |
| 49 public: | 49 public: |
| 50 // These must be defined as in the .idl file and must match those in the Pan
ner class. | 50 // These must be defined as in the .idl file and must match those in the Pan
ner class. |
| 51 enum { | 51 enum { |
| 52 EQUALPOWER = 0, | 52 EQUALPOWER = 0, |
| 53 HRTF = 1, | 53 HRTF = 1, |
| 54 SOUNDFIELD = 2, | 54 SOUNDFIELD = 2, |
| 55 }; | 55 }; |
| 56 | 56 |
| 57 // These must be defined as in the .idl file and must match those | 57 // These must be defined as in the .idl file and must match those |
| 58 // in the DistanceEffect class. | 58 // in the DistanceEffect class. |
| 59 enum { | 59 enum { |
| 60 LINEAR_DISTANCE = 0, | 60 LINEAR_DISTANCE = 0, |
| 61 INVERSE_DISTANCE = 1, | 61 INVERSE_DISTANCE = 1, |
| 62 EXPONENTIAL_DISTANCE = 2, | 62 EXPONENTIAL_DISTANCE = 2, |
| 63 }; | 63 }; |
| 64 | 64 |
| 65 static PassRefPtr<PannerNode> create(AudioContext* context, float sampleRate
) | 65 static PassRefPtr<PannerNode> create(AudioContext* context, float sampleRate
) |
| 66 { | 66 { |
| 67 return adoptRef(new PannerNode(context, sampleRate)); | 67 return adoptRef(new PannerNode(context, sampleRate)); |
| 68 } | 68 } |
| 69 | 69 |
| 70 virtual ~PannerNode(); | 70 virtual ~PannerNode(); |
| 71 | 71 |
| 72 // AudioNode | 72 // AudioNode |
| 73 virtual void process(size_t framesToProcess); | 73 virtual void process(size_t framesToProcess) OVERRIDE; |
| 74 virtual void pullInputs(size_t framesToProcess); | 74 virtual void pullInputs(size_t framesToProcess) OVERRIDE; |
| 75 virtual void reset(); | 75 virtual void reset() OVERRIDE; |
| 76 virtual void initialize(); | 76 virtual void initialize() OVERRIDE; |
| 77 virtual void uninitialize(); | 77 virtual void uninitialize() OVERRIDE; |
| 78 | 78 |
| 79 // Listener | 79 // Listener |
| 80 AudioListener* listener(); | 80 AudioListener* listener(); |
| 81 | 81 |
| 82 // Panning model | 82 // Panning model |
| 83 String panningModel() const; | 83 String panningModel() const; |
| 84 bool setPanningModel(unsigned); // Returns true on success. | 84 bool setPanningModel(unsigned); // Returns true on success. |
| 85 void setPanningModel(const String&); | 85 void setPanningModel(const String&); |
| 86 | 86 |
| 87 // Position | 87 // Position |
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| 156 | 156 |
| 157 unsigned m_connectionCount; | 157 unsigned m_connectionCount; |
| 158 | 158 |
| 159 // Synchronize process() and setPanningModel() which can change the panner. | 159 // Synchronize process() and setPanningModel() which can change the panner. |
| 160 mutable Mutex m_pannerLock; | 160 mutable Mutex m_pannerLock; |
| 161 }; | 161 }; |
| 162 | 162 |
| 163 } // namespace WebCore | 163 } // namespace WebCore |
| 164 | 164 |
| 165 #endif // PannerNode_h | 165 #endif // PannerNode_h |
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