Line data    Source code

       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           0 : NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(AudioListener, mContext)
      15             : 
      16           0 : NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioListener, AddRef)
      17           0 : NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioListener, Release)
      18             : 
      19           0 : 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           0 :   , mSpeedOfSound(343.3) // meters/second
      27             : {
      28           0 :   MOZ_ASSERT(aContext);
      29           0 : }
      30             : 
      31             : JSObject*
      32           0 : AudioListener::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
      33             : {
      34           0 :   return AudioListenerBinding::Wrap(aCx, this, aGivenProto);
      35             : }
      36             : 
      37             : void
      38           0 : AudioListener::SetOrientation(double aX, double aY, double aZ,
      39             :                               double aXUp, double aYUp, double aZUp)
      40             : {
      41           0 :   ThreeDPoint front(aX, aY, aZ);
      42             :   // The panning effect and the azimuth and elevation calculation in the Web
      43             :   // Audio spec becomes undefined with linearly dependent vectors, so keep
      44             :   // existing state in these situations.
      45           0 :   if (front.IsZero()) {
      46           0 :     return;
      47             :   }
      48             :   // Normalize before using CrossProduct() to avoid overflow.
      49           0 :   front.Normalize();
      50           0 :   ThreeDPoint up(aXUp, aYUp, aZUp);
      51           0 :   if (up.IsZero()) {
      52           0 :     return;
      53             :   }
      54           0 :   up.Normalize();
      55           0 :   ThreeDPoint right = front.CrossProduct(up);
      56           0 :   if (right.IsZero()) {
      57           0 :     return;
      58             :   }
      59           0 :   right.Normalize();
      60             : 
      61           0 :   if (!mFrontVector.FuzzyEqual(front)) {
      62           0 :     mFrontVector = front;
      63           0 :     SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, front);
      64             :   }
      65           0 :   if (!mRightVector.FuzzyEqual(right)) {
      66           0 :     mRightVector = right;
      67           0 :     SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, right);
      68             :   }
      69             : }
      70             : 
      71             : void
      72           0 : AudioListener::RegisterPannerNode(PannerNode* aPannerNode)
      73             : {
      74           0 :   mPanners.AppendElement(aPannerNode);
      75             : 
      76             :   // Let the panner node know about our parameters
      77           0 :   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_POSITION, mPosition);
      78           0 :   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, mFrontVector);
      79           0 :   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, mRightVector);
      80           0 :   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity);
      81           0 :   aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor);
      82           0 :   aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound);
      83           0 :   UpdatePannersVelocity();
      84           0 : }
      85             : 
      86           0 : void AudioListener::UnregisterPannerNode(PannerNode* aPannerNode)
      87             : {
      88           0 :   mPanners.RemoveElement(aPannerNode);
      89           0 : }
      90             : 
      91             : void
      92           0 : AudioListener::SendDoubleParameterToStream(uint32_t aIndex, double aValue)
      93             : {
      94           0 :   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
      95           0 :     if (mPanners[i]) {
      96           0 :       mPanners[i]->SendDoubleParameterToStream(aIndex, aValue);
      97             :     }
      98             :   }
      99           0 : }
     100             : 
     101             : void
     102           0 : AudioListener::SendThreeDPointParameterToStream(uint32_t aIndex, const ThreeDPoint& aValue)
     103             : {
     104           0 :   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
     105           0 :     if (mPanners[i]) {
     106           0 :       mPanners[i]->SendThreeDPointParameterToStream(aIndex, aValue);
     107             :     }
     108             :   }
     109           0 : }
     110             : 
     111           0 : void AudioListener::UpdatePannersVelocity()
     112             : {
     113           0 :   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
     114           0 :     if (mPanners[i]) {
     115           0 :       mPanners[i]->SendDopplerToSourcesIfNeeded();
     116             :     }
     117             :   }
     118           0 : }
     119             : 
     120             : size_t
     121           0 : AudioListener::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
     122             : {
     123           0 :   size_t amount = aMallocSizeOf(this);
     124             :   // AudioNodes are tracked separately
     125           0 :   amount += mPanners.ShallowSizeOfExcludingThis(aMallocSizeOf);
     126           0 :   return amount;
     127             : }
     128             : 
     129             : } // namespace dom
     130             : } // namespace mozilla
     131             :