1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2015 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Audio/AudioDevice.hpp>
#include <SFML/Audio/ALCheck.hpp>
#include <SFML/Audio/Listener.hpp>
#include <SFML/System/Err.hpp>
#include <memory>
namespace
{
ALCdevice* audioDevice = NULL;
ALCcontext* audioContext = NULL;
float listenerVolume = 100.f;
sf::Vector3f listenerPosition (0.f, 0.f, 0.f);
sf::Vector3f listenerDirection(0.f, 0.f, -1.f);
sf::Vector3f listenerUpVector (0.f, 1.f, 0.f);
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
AudioDevice::AudioDevice()
{
// Create the device
audioDevice = alcOpenDevice(NULL);
if (audioDevice)
{
// Create the context
audioContext = alcCreateContext(audioDevice, NULL);
if (audioContext)
{
// Set the context as the current one (we'll only need one)
alcMakeContextCurrent(audioContext);
// Apply the listener properties the user might have set
float orientation[] = {listenerDirection.x,
listenerDirection.y,
listenerDirection.z,
listenerUpVector.x,
listenerUpVector.y,
listenerUpVector.z};
alCheck(alListenerf(AL_GAIN, listenerVolume * 0.01f));
alCheck(alListener3f(AL_POSITION, listenerPosition.x, listenerPosition.y, listenerPosition.z));
alCheck(alListenerfv(AL_ORIENTATION, orientation));
}
else
{
err() << "Failed to create the audio context" << std::endl;
}
}
else
{
err() << "Failed to open the audio device" << std::endl;
}
}
////////////////////////////////////////////////////////////
AudioDevice::~AudioDevice()
{
// Destroy the context
alcMakeContextCurrent(NULL);
if (audioContext)
alcDestroyContext(audioContext);
// Destroy the device
if (audioDevice)
alcCloseDevice(audioDevice);
}
////////////////////////////////////////////////////////////
bool AudioDevice::isExtensionSupported(const std::string& extension)
{
// Create a temporary audio device in case none exists yet.
// This device will not be used in this function and merely
// makes sure there is a valid OpenAL device for extension
// queries if none has been created yet.
std::auto_ptr<AudioDevice> device;
if (!audioDevice)
device.reset(new AudioDevice);
if ((extension.length() > 2) && (extension.substr(0, 3) == "ALC"))
return alcIsExtensionPresent(audioDevice, extension.c_str()) != AL_FALSE;
else
return alIsExtensionPresent(extension.c_str()) != AL_FALSE;
}
////////////////////////////////////////////////////////////
int AudioDevice::getFormatFromChannelCount(unsigned int channelCount)
{
// Create a temporary audio device in case none exists yet.
// This device will not be used in this function and merely
// makes sure there is a valid OpenAL device for format
// queries if none has been created yet.
std::auto_ptr<AudioDevice> device;
if (!audioDevice)
device.reset(new AudioDevice);
// Find the good format according to the number of channels
int format = 0;
switch (channelCount)
{
case 1: format = AL_FORMAT_MONO16; break;
case 2: format = AL_FORMAT_STEREO16; break;
case 4: format = alGetEnumValue("AL_FORMAT_QUAD16"); break;
case 6: format = alGetEnumValue("AL_FORMAT_51CHN16"); break;
case 7: format = alGetEnumValue("AL_FORMAT_61CHN16"); break;
case 8: format = alGetEnumValue("AL_FORMAT_71CHN16"); break;
default: format = 0; break;
}
// Fixes a bug on OS X
if (format == -1)
format = 0;
return format;
}
////////////////////////////////////////////////////////////
void AudioDevice::setGlobalVolume(float volume)
{
if (audioContext)
alCheck(alListenerf(AL_GAIN, volume * 0.01f));
listenerVolume = volume;
}
////////////////////////////////////////////////////////////
float AudioDevice::getGlobalVolume()
{
return listenerVolume;
}
////////////////////////////////////////////////////////////
void AudioDevice::setPosition(const Vector3f& position)
{
if (audioContext)
alCheck(alListener3f(AL_POSITION, position.x, position.y, position.z));
listenerPosition = position;
}
////////////////////////////////////////////////////////////
Vector3f AudioDevice::getPosition()
{
return listenerPosition;
}
////////////////////////////////////////////////////////////
void AudioDevice::setDirection(const Vector3f& direction)
{
if (audioContext)
{
float orientation[] = {direction.x, direction.y, direction.z, listenerUpVector.x, listenerUpVector.y, listenerUpVector.z};
alCheck(alListenerfv(AL_ORIENTATION, orientation));
}
listenerDirection = direction;
}
////////////////////////////////////////////////////////////
Vector3f AudioDevice::getDirection()
{
return listenerDirection;
}
////////////////////////////////////////////////////////////
void AudioDevice::setUpVector(const Vector3f& upVector)
{
if (audioContext)
{
float orientation[] = {listenerDirection.x, listenerDirection.y, listenerDirection.z, upVector.x, upVector.y, upVector.z};
alCheck(alListenerfv(AL_ORIENTATION, orientation));
}
listenerUpVector = upVector;
}
////////////////////////////////////////////////////////////
Vector3f AudioDevice::getUpVector()
{
return listenerUpVector;
}
} // namespace priv
} // namespace sf
|
