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
40namespace blink {
41
42AudioListener::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
52AudioListener::~AudioListener()
53{
54}
55
56void AudioListener::trace(Visitor* visitor)
57{
58    visitor->trace(m_panners);
59    visitor->trace(m_hrtfDatabaseLoader);
60}
61
62void AudioListener::addPanner(PannerNode* panner)
63{
64    ASSERT(isMainThread());
65    if (!panner)
66        return;
67
68    m_panners.append(panner);
69}
70
71void 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
82void AudioListener::createAndLoadHRTFDatabaseLoader(float sampleRate)
83{
84    if (!m_hrtfDatabaseLoader)
85        m_hrtfDatabaseLoader = HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(sampleRate);
86}
87
88bool AudioListener::isHRTFDatabaseLoaded()
89{
90    return m_hrtfDatabaseLoader->isLoaded();
91}
92
93void AudioListener::waitForHRTFDatabaseLoaderThreadCompletion()
94{
95    if (m_hrtfDatabaseLoader)
96        m_hrtfDatabaseLoader->waitForLoaderThreadCompletion();
97}
98
99void AudioListener::markPannersAsDirty(unsigned type)
100{
101    for (unsigned i = 0; i < m_panners.size(); ++i)
102        m_panners[i]->markPannerAsDirty(type);
103}
104
105void 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
116void 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
127void 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
138void 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
149void 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
160void 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