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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /dom/media/webaudio/AudioListener.cpp | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/media/webaudio/AudioListener.cpp')
-rw-r--r-- | dom/media/webaudio/AudioListener.cpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/dom/media/webaudio/AudioListener.cpp b/dom/media/webaudio/AudioListener.cpp new file mode 100644 index 000000000..0bd11156a --- /dev/null +++ b/dom/media/webaudio/AudioListener.cpp @@ -0,0 +1,131 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sw=2 sts=2 et cindent: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "AudioListener.h" +#include "AudioContext.h" +#include "mozilla/dom/AudioListenerBinding.h" + +namespace mozilla { +namespace dom { + +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(AudioListener, mContext) + +NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioListener, AddRef) +NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioListener, Release) + +AudioListener::AudioListener(AudioContext* aContext) + : mContext(aContext) + , mPosition() + , mFrontVector(0., 0., -1.) + , mRightVector(1., 0., 0.) + , mVelocity() + , mDopplerFactor(1.) + , mSpeedOfSound(343.3) // meters/second +{ + MOZ_ASSERT(aContext); +} + +JSObject* +AudioListener::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) +{ + return AudioListenerBinding::Wrap(aCx, this, aGivenProto); +} + +void +AudioListener::SetOrientation(double aX, double aY, double aZ, + double aXUp, double aYUp, double aZUp) +{ + ThreeDPoint front(aX, aY, aZ); + // The panning effect and the azimuth and elevation calculation in the Web + // Audio spec becomes undefined with linearly dependent vectors, so keep + // existing state in these situations. + if (front.IsZero()) { + return; + } + // Normalize before using CrossProduct() to avoid overflow. + front.Normalize(); + ThreeDPoint up(aXUp, aYUp, aZUp); + if (up.IsZero()) { + return; + } + up.Normalize(); + ThreeDPoint right = front.CrossProduct(up); + if (right.IsZero()) { + return; + } + right.Normalize(); + + if (!mFrontVector.FuzzyEqual(front)) { + mFrontVector = front; + SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, front); + } + if (!mRightVector.FuzzyEqual(right)) { + mRightVector = right; + SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, right); + } +} + +void +AudioListener::RegisterPannerNode(PannerNode* aPannerNode) +{ + mPanners.AppendElement(aPannerNode); + + // Let the panner node know about our parameters + aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_POSITION, mPosition); + aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, mFrontVector); + aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, mRightVector); + aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity); + aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor); + aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound); + UpdatePannersVelocity(); +} + +void AudioListener::UnregisterPannerNode(PannerNode* aPannerNode) +{ + mPanners.RemoveElement(aPannerNode); +} + +void +AudioListener::SendDoubleParameterToStream(uint32_t aIndex, double aValue) +{ + for (uint32_t i = 0; i < mPanners.Length(); ++i) { + if (mPanners[i]) { + mPanners[i]->SendDoubleParameterToStream(aIndex, aValue); + } + } +} + +void +AudioListener::SendThreeDPointParameterToStream(uint32_t aIndex, const ThreeDPoint& aValue) +{ + for (uint32_t i = 0; i < mPanners.Length(); ++i) { + if (mPanners[i]) { + mPanners[i]->SendThreeDPointParameterToStream(aIndex, aValue); + } + } +} + +void AudioListener::UpdatePannersVelocity() +{ + for (uint32_t i = 0; i < mPanners.Length(); ++i) { + if (mPanners[i]) { + mPanners[i]->SendDopplerToSourcesIfNeeded(); + } + } +} + +size_t +AudioListener::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const +{ + size_t amount = aMallocSizeOf(this); + // AudioNodes are tracked separately + amount += mPanners.ShallowSizeOfExcludingThis(aMallocSizeOf); + return amount; +} + +} // namespace dom +} // namespace mozilla + |