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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>SFML - Simple and Fast Multimedia Library</title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="tabs.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="logo">
<img src="./logo.jpg" width="770" height="200" title="SFML home" alt="SFML logo" />
</div>
<!-- Generated by Doxygen 1.5.8 -->
<div class="navigation" id="top">
<div class="tabs">
<ul>
<li><a href="index.htm"><span>Main Page</span></a></li>
<li><a href="namespaces.htm"><span>Namespaces</span></a></li>
<li><a href="annotated.htm"><span>Classes</span></a></li>
<li class="current"><a href="files.htm"><span>Files</span></a></li>
</ul>
</div>
<div class="tabs">
<ul>
<li><a href="files.htm"><span>File List</span></a></li>
</ul>
</div>
<h1>SoundRecorder.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// SFML - Simple and Fast Multimedia Library</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This software is provided 'as-is', without any express or implied warranty.</span>
<a name="l00007"></a>00007 <span class="comment">// In no event will the authors be held liable for any damages arising from the use of this software.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// Permission is granted to anyone to use this software for any purpose,</span>
<a name="l00010"></a>00010 <span class="comment">// including commercial applications, and to alter it and redistribute it freely,</span>
<a name="l00011"></a>00011 <span class="comment">// subject to the following restrictions:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// 1. The origin of this software must not be misrepresented;</span>
<a name="l00014"></a>00014 <span class="comment">// you must not claim that you wrote the original software.</span>
<a name="l00015"></a>00015 <span class="comment">// If you use this software in a product, an acknowledgment</span>
<a name="l00016"></a>00016 <span class="comment">// in the product documentation would be appreciated but is not required.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// 2. Altered source versions must be plainly marked as such,</span>
<a name="l00019"></a>00019 <span class="comment">// and must not be misrepresented as being the original software.</span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="comment">// 3. This notice may not be removed or altered from any source distribution.</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">// Headers</span>
<a name="l00028"></a>00028 <span class="comment"></span><span class="preprocessor">#include <SFML/Audio/SoundRecorder.hpp></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <SFML/Audio/AudioDevice.hpp></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <SFML/Audio/OpenAL.hpp></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <SFML/System/Sleep.hpp></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <iostream></span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034
<a name="l00036"></a>00036 <span class="comment">// Private data</span>
<a name="l00038"></a>00038 <span class="comment"></span><span class="keyword">namespace</span>
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 ALCdevice* CaptureDevice = NULL;
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">namespace </span>sf
<a name="l00044"></a>00044 {
<a name="l00048"></a><a class="code" href="classsf_1_1SoundRecorder.htm#50ebad413c4f157408a0fa49f23212a9">00048</a> <a class="code" href="classsf_1_1SoundRecorder.htm#50ebad413c4f157408a0fa49f23212a9" title="Default constructor.">SoundRecorder::SoundRecorder</a>() :
<a name="l00049"></a>00049 mySampleRate (0),
<a name="l00050"></a>00050 myIsCapturing(false)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055
<a name="l00059"></a><a class="code" href="classsf_1_1SoundRecorder.htm#e83953cce24c5245c0672d150d280b64">00059</a> <a class="code" href="classsf_1_1SoundRecorder.htm#e83953cce24c5245c0672d150d280b64" title="Virtual destructor.">SoundRecorder::~SoundRecorder</a>()
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="comment">// Nothing to do</span>
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063
<a name="l00064"></a>00064
<a name="l00069"></a><a class="code" href="classsf_1_1SoundRecorder.htm#6693c1ac2c0d1677f798539b0643eac6">00069</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundRecorder.htm#6693c1ac2c0d1677f798539b0643eac6" title="Start the capture.">SoundRecorder::Start</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> SampleRate)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="comment">// Check if the device can do audio capture</span>
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SoundRecorder.htm#436acab98f3f95d146b3ffe24fbf3fc5" title="Tell if the system supports sound capture.">CanCapture</a>())
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 std::cerr << <span class="stringliteral">"Failed to start capture : your system cannot capture audio data (call SoundRecorder::CanCapture to check it)"</span> << std::endl;
<a name="l00075"></a>00075 <span class="keywordflow">return</span>;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="comment">// Check that another capture is not already running</span>
<a name="l00079"></a>00079 <span class="keywordflow">if</span> (CaptureDevice)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 std::cerr << <span class="stringliteral">"Trying to start audio capture, but another capture is already running"</span> << std::endl;
<a name="l00082"></a>00082 <span class="keywordflow">return</span>;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// Open the capture device for capturing 16 bits mono samples</span>
<a name="l00086"></a>00086 CaptureDevice = alcCaptureOpenDevice(NULL, SampleRate, AL_FORMAT_MONO16, SampleRate);
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (!CaptureDevice)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 std::cerr << <span class="stringliteral">"Failed to open the audio capture device"</span> << std::endl;
<a name="l00090"></a>00090 <span class="keywordflow">return</span>;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// Clear the sample array</span>
<a name="l00094"></a>00094 mySamples.clear();
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// Store the sample rate</span>
<a name="l00097"></a>00097 mySampleRate = SampleRate;
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">// Notify derived class</span>
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (OnStart())
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <span class="comment">// Start the capture</span>
<a name="l00103"></a>00103 alcCaptureStart(CaptureDevice);
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="comment">// Start the capture in a new thread, to avoid blocking the main thread</span>
<a name="l00106"></a>00106 myIsCapturing = <span class="keyword">true</span>;
<a name="l00107"></a>00107 <a class="code" href="classsf_1_1Thread.htm#046df871f73d3cf452d1c72bcc143642" title="Create and run the thread.">Launch</a>();
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111
<a name="l00115"></a><a class="code" href="classsf_1_1SoundRecorder.htm#9d51c7ef42bcdd4ad53e995d57f90733">00115</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundRecorder.htm#9d51c7ef42bcdd4ad53e995d57f90733" title="Stop the capture.">SoundRecorder::Stop</a>()
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="comment">// Stop the capturing thread</span>
<a name="l00118"></a>00118 myIsCapturing = <span class="keyword">false</span>;
<a name="l00119"></a>00119 <a class="code" href="classsf_1_1Thread.htm#67f3c609fdf99688531dbfae461ea4d2" title="Wait until the thread finishes.">Wait</a>();
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121
<a name="l00122"></a>00122
<a name="l00126"></a><a class="code" href="classsf_1_1SoundRecorder.htm#bab8a7f4ba28658c4bf707639f11a6c5">00126</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classsf_1_1SoundRecorder.htm#bab8a7f4ba28658c4bf707639f11a6c5" title="Get the sample rate.">SoundRecorder::GetSampleRate</a>()<span class="keyword"> const</span>
<a name="l00127"></a>00127 <span class="keyword"></span>{
<a name="l00128"></a>00128 <span class="keywordflow">return</span> mySampleRate;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131
<a name="l00136"></a><a class="code" href="classsf_1_1SoundRecorder.htm#436acab98f3f95d146b3ffe24fbf3fc5">00136</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SoundRecorder.htm#436acab98f3f95d146b3ffe24fbf3fc5" title="Tell if the system supports sound capture.">SoundRecorder::CanCapture</a>()
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 ALCdevice* Device = priv::AudioDevice::GetInstance().GetDevice();
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="keywordflow">return</span> (alcIsExtensionPresent(Device, <span class="stringliteral">"ALC_EXT_CAPTURE"</span>) != AL_FALSE) ||
<a name="l00141"></a>00141 (alcIsExtensionPresent(Device, <span class="stringliteral">"ALC_EXT_capture"</span>) != AL_FALSE); <span class="comment">// "bug" in Mac OS X 10.5 and 10.6</span>
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00144"></a>00144
<a name="l00148"></a>00148 <span class="keywordtype">bool</span> SoundRecorder::OnStart()
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150 <span class="comment">// Nothing to do</span>
<a name="l00151"></a>00151 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154
<a name="l00158"></a>00158 <span class="keywordtype">void</span> SoundRecorder::OnStop()
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 <span class="comment">// Nothing to do</span>
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163
<a name="l00167"></a>00167 <span class="keywordtype">void</span> SoundRecorder::Run()
<a name="l00168"></a>00168 {
<a name="l00169"></a>00169 <span class="keywordflow">while</span> (myIsCapturing)
<a name="l00170"></a>00170 {
<a name="l00171"></a>00171 <span class="comment">// Process available samples</span>
<a name="l00172"></a>00172 ProcessCapturedSamples();
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">// Don't bother the CPU while waiting for more captured data</span>
<a name="l00175"></a>00175 Sleep(0.1f);
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">// Capture is finished : clean up everything</span>
<a name="l00179"></a>00179 CleanUp();
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">// Notify derived class</span>
<a name="l00182"></a>00182 OnStop();
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185
<a name="l00189"></a>00189 <span class="keywordtype">void</span> SoundRecorder::ProcessCapturedSamples()
<a name="l00190"></a>00190 {
<a name="l00191"></a>00191 <span class="comment">// Get the number of samples available</span>
<a name="l00192"></a>00192 ALCint SamplesAvailable;
<a name="l00193"></a>00193 alcGetIntegerv(CaptureDevice, ALC_CAPTURE_SAMPLES, 1, &SamplesAvailable);
<a name="l00194"></a>00194
<a name="l00195"></a>00195 <span class="keywordflow">if</span> (SamplesAvailable > 0)
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197 <span class="comment">// Get the recorded samples</span>
<a name="l00198"></a>00198 mySamples.resize(SamplesAvailable);
<a name="l00199"></a>00199 alcCaptureSamples(CaptureDevice, &mySamples[0], SamplesAvailable);
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="comment">// Forward them to the derived class</span>
<a name="l00202"></a>00202 <span class="keywordflow">if</span> (!OnProcessSamples(&mySamples[0], mySamples.size()))
<a name="l00203"></a>00203 {
<a name="l00204"></a>00204 <span class="comment">// The user wants to stop the capture</span>
<a name="l00205"></a>00205 myIsCapturing = <span class="keyword">false</span>;
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208 }
<a name="l00209"></a>00209
<a name="l00210"></a>00210
<a name="l00214"></a>00214 <span class="keywordtype">void</span> SoundRecorder::CleanUp()
<a name="l00215"></a>00215 {
<a name="l00216"></a>00216 <span class="comment">// Stop the capture</span>
<a name="l00217"></a>00217 alcCaptureStop(CaptureDevice);
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <span class="comment">// Get the samples left in the buffer</span>
<a name="l00220"></a>00220 ProcessCapturedSamples();
<a name="l00221"></a>00221
<a name="l00222"></a>00222 <span class="comment">// Close the device</span>
<a name="l00223"></a>00223 alcCaptureCloseDevice(CaptureDevice);
<a name="l00224"></a>00224 CaptureDevice = NULL;
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226
<a name="l00227"></a>00227 } <span class="comment">// namespace sf</span>
</pre></div></div>
<p id="footer">
:: Copyright © 2007-2008 Laurent Gomila, all rights reserved ::
Documentation generated by <a href="http://www.doxygen.org/" title="doxygen website">doxygen 1.5.2</a> ::
</p>
</body>
</html>
|
