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content/media/webaudio/AudioListener.cpp@97036ab72558 (annotated)

content/media/webaudio/AudioListener.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Tue, 06 Jan 2015 21:39:09 +0100

branch

TOR_BUG_9701

changeset 8

97036ab72558

permissions

-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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