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comparison: content/media/webaudio/AudioListener.cpp
content/media/webaudio/AudioListener.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:82e9efc6d3ba |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "AudioListener.h" | |
| 8 #include "AudioContext.h" | |
| 9 #include "mozilla/dom/AudioListenerBinding.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 namespace dom { | |
| 13 | |
| 14 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(AudioListener, mContext) | |
| 15 | |
| 16 NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioListener, AddRef) | |
| 17 NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioListener, Release) | |
| 18 | |
| 19 AudioListener::AudioListener(AudioContext* aContext) | |
| 20 : mContext(aContext) | |
| 21 , mPosition() | |
| 22 , mFrontVector(0., 0., -1.) | |
| 23 , mRightVector(1., 0., 0.) | |
| 24 , mVelocity() | |
| 25 , mDopplerFactor(1.) | |
| 26 , mSpeedOfSound(343.3) // meters/second | |
| 27 { | |
| 28 MOZ_ASSERT(aContext); | |
| 29 SetIsDOMBinding(); | |
| 30 } | |
| 31 | |
| 32 JSObject* | |
| 33 AudioListener::WrapObject(JSContext* aCx) | |
| 34 { | |
| 35 return AudioListenerBinding::Wrap(aCx, this); | |
| 36 } | |
| 37 | |
| 38 void | |
| 39 AudioListener::SetOrientation(double aX, double aY, double aZ, | |
| 40 double aXUp, double aYUp, double aZUp) | |
| 41 { | |
| 42 ThreeDPoint front(aX, aY, aZ); | |
| 43 // The panning effect and the azimuth and elevation calculation in the Web | |
| 44 // Audio spec becomes undefined with linearly dependent vectors, so keep | |
| 45 // existing state in these situations. | |
| 46 if (front.IsZero()) { | |
| 47 return; | |
| 48 } | |
| 49 // Normalize before using CrossProduct() to avoid overflow. | |
| 50 front.Normalize(); | |
| 51 ThreeDPoint up(aXUp, aYUp, aZUp); | |
| 52 if (up.IsZero()) { | |
| 53 return; | |
| 54 } | |
| 55 up.Normalize(); | |
| 56 ThreeDPoint right = front.CrossProduct(up); | |
| 57 if (right.IsZero()) { | |
| 58 return; | |
| 59 } | |
| 60 right.Normalize(); | |
| 61 | |
| 62 if (!mFrontVector.FuzzyEqual(front)) { | |
| 63 mFrontVector = front; | |
| 64 SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, front); | |
| 65 } | |
| 66 if (!mRightVector.FuzzyEqual(right)) { | |
| 67 mRightVector = right; | |
| 68 SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, right); | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 void | |
| 73 AudioListener::RegisterPannerNode(PannerNode* aPannerNode) | |
| 74 { | |
| 75 mPanners.AppendElement(aPannerNode->asWeakPtr()); | |
| 76 | |
| 77 // Let the panner node know about our parameters | |
| 78 aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_POSITION, mPosition); | |
| 79 aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, mFrontVector); | |
| 80 aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, mRightVector); | |
| 81 aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity); | |
| 82 aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor); | |
| 83 aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound); | |
| 84 UpdatePannersVelocity(); | |
| 85 } | |
| 86 | |
| 87 void AudioListener::UnregisterPannerNode(PannerNode* aPannerNode) | |
| 88 { | |
| 89 mPanners.RemoveElement(aPannerNode); | |
| 90 } | |
| 91 | |
| 92 void | |
| 93 AudioListener::SendDoubleParameterToStream(uint32_t aIndex, double aValue) | |
| 94 { | |
| 95 for (uint32_t i = 0; i < mPanners.Length(); ++i) { | |
| 96 if (mPanners[i]) { | |
| 97 mPanners[i]->SendDoubleParameterToStream(aIndex, aValue); | |
| 98 } | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void | |
| 103 AudioListener::SendThreeDPointParameterToStream(uint32_t aIndex, const ThreeDPoint& aValue) | |
| 104 { | |
| 105 for (uint32_t i = 0; i < mPanners.Length(); ++i) { | |
| 106 if (mPanners[i]) { | |
| 107 mPanners[i]->SendThreeDPointParameterToStream(aIndex, aValue); | |
| 108 } | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 void AudioListener::UpdatePannersVelocity() | |
| 113 { | |
| 114 for (uint32_t i = 0; i < mPanners.Length(); ++i) { | |
| 115 if (mPanners[i]) { | |
| 116 mPanners[i]->SendDopplerToSourcesIfNeeded(); | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 size_t | |
| 122 AudioListener::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const | |
| 123 { | |
| 124 size_t amount = aMallocSizeOf(this); | |
| 125 // AudioNodes are tracked separately | |
| 126 amount += mPanners.SizeOfExcludingThis(aMallocSizeOf); | |
| 127 return amount; | |
| 128 } | |
| 129 | |
| 130 } | |
| 131 } | |
| 132 |
