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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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| 32 #include "platform/audio/Cone.h" | 32 #include "platform/audio/Cone.h" |
| 33 #include "platform/audio/Distance.h" | 33 #include "platform/audio/Distance.h" |
| 34 #include "platform/audio/Panner.h" | 34 #include "platform/audio/Panner.h" |
| 35 #include "platform/geometry/FloatPoint3D.h" | 35 #include "platform/geometry/FloatPoint3D.h" |
| 36 #include "wtf/HashMap.h" | 36 #include "wtf/HashMap.h" |
| 37 #include <memory> | 37 #include <memory> |
| 38 | 38 |
| 39 namespace blink { | 39 namespace blink { |
| 40 | 40 |
| 41 class BaseAudioContext; | 41 class BaseAudioContext; |
| 42 class PannerOptions; |
| 42 | 43 |
| 43 // PannerNode is an AudioNode with one input and one output. | 44 // PannerNode is an AudioNode with one input and one output. |
| 44 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. | 45 // It positions a sound in 3D space, with the exact effect dependent on the pann
ing model. |
| 45 // It has a position and an orientation in 3D space which is relative to the pos
ition and orientation of the context's AudioListener. | 46 // It has a position and an orientation in 3D space which is relative to the pos
ition and orientation of the context's AudioListener. |
| 46 // A distance effect will attenuate the gain as the position moves away from the
listener. | 47 // A distance effect will attenuate the gain as the position moves away from the
listener. |
| 47 // A cone effect will attenuate the gain as the orientation moves away from the
listener. | 48 // A cone effect will attenuate the gain as the orientation moves away from the
listener. |
| 48 // All of these effects follow the OpenAL specification very closely. | 49 // All of these effects follow the OpenAL specification very closely. |
| 49 | 50 |
| 50 class PannerHandler final : public AudioHandler { | 51 class PannerHandler final : public AudioHandler { |
| 51 public: | 52 public: |
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| 201 FloatPoint3D m_lastOrientation; | 202 FloatPoint3D m_lastOrientation; |
| 202 | 203 |
| 203 // Synchronize process() with setting of the panning model, source's locatio
n information, listener, distance parameters and sound cones. | 204 // Synchronize process() with setting of the panning model, source's locatio
n information, listener, distance parameters and sound cones. |
| 204 mutable Mutex m_processLock; | 205 mutable Mutex m_processLock; |
| 205 }; | 206 }; |
| 206 | 207 |
| 207 class PannerNode final : public AudioNode { | 208 class PannerNode final : public AudioNode { |
| 208 DEFINE_WRAPPERTYPEINFO(); | 209 DEFINE_WRAPPERTYPEINFO(); |
| 209 public: | 210 public: |
| 210 static PannerNode* create(BaseAudioContext&, ExceptionState&); | 211 static PannerNode* create(BaseAudioContext&, ExceptionState&); |
| 212 static PannerNode* create(BaseAudioContext*, const PannerOptions&, Exception
State&); |
| 211 PannerHandler& pannerHandler() const; | 213 PannerHandler& pannerHandler() const; |
| 212 | 214 |
| 213 DECLARE_VIRTUAL_TRACE(); | 215 DECLARE_VIRTUAL_TRACE(); |
| 214 | 216 |
| 215 // Uses a 3D cartesian coordinate system | 217 // Uses a 3D cartesian coordinate system |
| 216 AudioParam* positionX() const { return m_positionX; }; | 218 AudioParam* positionX() const { return m_positionX; }; |
| 217 AudioParam* positionY() const { return m_positionY; }; | 219 AudioParam* positionY() const { return m_positionY; }; |
| 218 AudioParam* positionZ() const { return m_positionZ; }; | 220 AudioParam* positionZ() const { return m_positionZ; }; |
| 219 | 221 |
| 220 AudioParam* orientationX() const { return m_orientationX; }; | 222 AudioParam* orientationX() const { return m_orientationX; }; |
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| 249 Member<AudioParam> m_positionZ; | 251 Member<AudioParam> m_positionZ; |
| 250 | 252 |
| 251 Member<AudioParam> m_orientationX; | 253 Member<AudioParam> m_orientationX; |
| 252 Member<AudioParam> m_orientationY; | 254 Member<AudioParam> m_orientationY; |
| 253 Member<AudioParam> m_orientationZ; | 255 Member<AudioParam> m_orientationZ; |
| 254 }; | 256 }; |
| 255 | 257 |
| 256 } // namespace blink | 258 } // namespace blink |
| 257 | 259 |
| 258 #endif // PannerNode_h | 260 #endif // PannerNode_h |
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