michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "AudioListener.h"
michael@0: #include "AudioContext.h"
michael@0: #include "mozilla/dom/AudioListenerBinding.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(AudioListener, mContext)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioListener, AddRef)
michael@0: NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioListener, Release)
michael@0: 
michael@0: AudioListener::AudioListener(AudioContext* aContext)
michael@0:   : mContext(aContext)
michael@0:   , mPosition()
michael@0:   , mFrontVector(0., 0., -1.)
michael@0:   , mRightVector(1., 0., 0.)
michael@0:   , mVelocity()
michael@0:   , mDopplerFactor(1.)
michael@0:   , mSpeedOfSound(343.3) // meters/second
michael@0: {
michael@0:   MOZ_ASSERT(aContext);
michael@0:   SetIsDOMBinding();
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: AudioListener::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return AudioListenerBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioListener::SetOrientation(double aX, double aY, double aZ,
michael@0:                               double aXUp, double aYUp, double aZUp)
michael@0: {
michael@0:   ThreeDPoint front(aX, aY, aZ);
michael@0:   // The panning effect and the azimuth and elevation calculation in the Web
michael@0:   // Audio spec becomes undefined with linearly dependent vectors, so keep
michael@0:   // existing state in these situations.
michael@0:   if (front.IsZero()) {
michael@0:     return;
michael@0:   }
michael@0:   // Normalize before using CrossProduct() to avoid overflow.
michael@0:   front.Normalize();
michael@0:   ThreeDPoint up(aXUp, aYUp, aZUp);
michael@0:   if (up.IsZero()) {
michael@0:     return;
michael@0:   }
michael@0:   up.Normalize();
michael@0:   ThreeDPoint right = front.CrossProduct(up);
michael@0:   if (right.IsZero()) {
michael@0:     return;
michael@0:   }
michael@0:   right.Normalize();
michael@0: 
michael@0:   if (!mFrontVector.FuzzyEqual(front)) {
michael@0:     mFrontVector = front;
michael@0:     SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, front);
michael@0:   }
michael@0:   if (!mRightVector.FuzzyEqual(right)) {
michael@0:     mRightVector = right;
michael@0:     SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, right);
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioListener::RegisterPannerNode(PannerNode* aPannerNode)
michael@0: {
michael@0:   mPanners.AppendElement(aPannerNode->asWeakPtr());
michael@0: 
michael@0:   // Let the panner node know about our parameters
michael@0:   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_POSITION, mPosition);
michael@0:   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, mFrontVector);
michael@0:   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, mRightVector);
michael@0:   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity);
michael@0:   aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor);
michael@0:   aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound);
michael@0:   UpdatePannersVelocity();
michael@0: }
michael@0: 
michael@0: void AudioListener::UnregisterPannerNode(PannerNode* aPannerNode)
michael@0: {
michael@0:   mPanners.RemoveElement(aPannerNode);
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioListener::SendDoubleParameterToStream(uint32_t aIndex, double aValue)
michael@0: {
michael@0:   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
michael@0:     if (mPanners[i]) {
michael@0:       mPanners[i]->SendDoubleParameterToStream(aIndex, aValue);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: AudioListener::SendThreeDPointParameterToStream(uint32_t aIndex, const ThreeDPoint& aValue)
michael@0: {
michael@0:   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
michael@0:     if (mPanners[i]) {
michael@0:       mPanners[i]->SendThreeDPointParameterToStream(aIndex, aValue);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: void AudioListener::UpdatePannersVelocity()
michael@0: {
michael@0:   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
michael@0:     if (mPanners[i]) {
michael@0:       mPanners[i]->SendDopplerToSourcesIfNeeded();
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: size_t
michael@0: AudioListener::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   size_t amount = aMallocSizeOf(this);
michael@0:   // AudioNodes are tracked separately
michael@0:   amount += mPanners.SizeOfExcludingThis(aMallocSizeOf);
michael@0:   return amount;
michael@0: }
michael@0: 
michael@0: }
michael@0: }
michael@0: