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1 /*
2  * Copyright (C) 2010 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1.  Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  * 2.  Redistributions in binary form must reproduce the above copyright
11  *     notice, this list of conditions and the following disclaimer in the
12  *     documentation and/or other materials provided with the distribution.
13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14  *     its contributors may be used to endorse or promote products derived
15  *     from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include "config.h"
30 
31 #if ENABLE(WEB_AUDIO)
32 
33 #include "modules/webaudio/AudioListener.h"
34 
35 #include "modules/webaudio/PannerNode.h"
36 #include "platform/audio/AudioBus.h"
37 #include "platform/audio/HRTFDatabaseLoader.h"
38 #include "wtf/MainThread.h"
39 
40 namespace blink {
41 
AudioListener()42 AudioListener::AudioListener()
43     : m_position(0, 0, 0)
44     , m_orientation(0, 0, -1)
45     , m_upVector(0, 1, 0)
46     , m_velocity(0, 0, 0)
47     , m_dopplerFactor(1)
48     , m_speedOfSound(343.3)
49 {
50 }
51 
~AudioListener()52 AudioListener::~AudioListener()
53 {
54 }
55 
trace(Visitor * visitor)56 void AudioListener::trace(Visitor* visitor)
57 {
58     visitor->trace(m_panners);
59     visitor->trace(m_hrtfDatabaseLoader);
60 }
61 
addPanner(PannerNode * panner)62 void AudioListener::addPanner(PannerNode* panner)
63 {
64     ASSERT(isMainThread());
65     if (!panner)
66         return;
67 
68     m_panners.append(panner);
69 }
70 
removePanner(PannerNode * panner)71 void AudioListener::removePanner(PannerNode* panner)
72 {
73     ASSERT(isMainThread());
74     for (unsigned i = 0; i < m_panners.size(); ++i) {
75         if (panner == m_panners[i]) {
76             m_panners.remove(i);
77             break;
78         }
79     }
80 }
81 
createAndLoadHRTFDatabaseLoader(float sampleRate)82 void AudioListener::createAndLoadHRTFDatabaseLoader(float sampleRate)
83 {
84     if (!m_hrtfDatabaseLoader)
85         m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate);
86 }
87 
isHRTFDatabaseLoaded()88 bool AudioListener::isHRTFDatabaseLoaded()
89 {
90     return m_hrtfDatabaseLoader->isLoaded();
91 }
92 
waitForHRTFDatabaseLoaderThreadCompletion()93 void AudioListener::waitForHRTFDatabaseLoaderThreadCompletion()
94 {
95     if (m_hrtfDatabaseLoader)
96         m_hrtfDatabaseLoader->waitForLoaderThreadCompletion();
97 }
98 
markPannersAsDirty(unsigned type)99 void AudioListener::markPannersAsDirty(unsigned type)
100 {
101     for (unsigned i = 0; i < m_panners.size(); ++i)
102         m_panners[i]->markPannerAsDirty(type);
103 }
104 
setPosition(const FloatPoint3D & position)105 void AudioListener::setPosition(const FloatPoint3D &position)
106 {
107     if (m_position == position)
108         return;
109 
110     // This synchronizes with panner's process().
111     MutexLocker listenerLocker(m_listenerLock);
112     m_position = position;
113     markPannersAsDirty(PannerNode::AzimuthElevationDirty | PannerNode::DistanceConeGainDirty | PannerNode::DopplerRateDirty);
114 }
115 
setOrientation(const FloatPoint3D & orientation)116 void AudioListener::setOrientation(const FloatPoint3D &orientation)
117 {
118     if (m_orientation == orientation)
119         return;
120 
121     // This synchronizes with panner's process().
122     MutexLocker listenerLocker(m_listenerLock);
123     m_orientation = orientation;
124     markPannersAsDirty(PannerNode::AzimuthElevationDirty);
125 }
126 
setUpVector(const FloatPoint3D & upVector)127 void AudioListener::setUpVector(const FloatPoint3D &upVector)
128 {
129     if (m_upVector == upVector)
130         return;
131 
132     // This synchronizes with panner's process().
133     MutexLocker listenerLocker(m_listenerLock);
134     m_upVector = upVector;
135     markPannersAsDirty(PannerNode::AzimuthElevationDirty);
136 }
137 
setVelocity(const FloatPoint3D & velocity)138 void AudioListener::setVelocity(const FloatPoint3D &velocity)
139 {
140     if (m_velocity == velocity)
141         return;
142 
143     // This synchronizes with panner's process().
144     MutexLocker listenerLocker(m_listenerLock);
145     m_velocity = velocity;
146     markPannersAsDirty(PannerNode::DopplerRateDirty);
147 }
148 
setDopplerFactor(double dopplerFactor)149 void AudioListener::setDopplerFactor(double dopplerFactor)
150 {
151     if (m_dopplerFactor == dopplerFactor)
152         return;
153 
154     // This synchronizes with panner's process().
155     MutexLocker listenerLocker(m_listenerLock);
156     m_dopplerFactor = dopplerFactor;
157     markPannersAsDirty(PannerNode::DopplerRateDirty);
158 }
159 
setSpeedOfSound(double speedOfSound)160 void AudioListener::setSpeedOfSound(double speedOfSound)
161 {
162     if (m_speedOfSound == speedOfSound)
163         return;
164 
165     // This synchronizes with panner's process().
166     MutexLocker listenerLocker(m_listenerLock);
167     m_speedOfSound = speedOfSound;
168     markPannersAsDirty(PannerNode::DopplerRateDirty);
169 }
170 
171 } // namespace blink
172 
173 #endif // ENABLE(WEB_AUDIO)
174