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<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 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143
<a name="l00147"></a>00147 <span class="keywordtype">bool</span> SoundRecorder::OnStart()
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <span class="comment">// Nothing to do</span>
<a name="l00150"></a>00150 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153
<a name="l00157"></a>00157 <span class="keywordtype">void</span> SoundRecorder::OnStop()
<a name="l00158"></a>00158 {
<a name="l00159"></a>00159 <span class="comment">// Nothing to do</span>
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161
<a name="l00162"></a>00162
<a name="l00166"></a>00166 <span class="keywordtype">void</span> SoundRecorder::Run()
<a name="l00167"></a>00167 {
<a name="l00168"></a>00168 <span class="keywordflow">while</span> (myIsCapturing)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="comment">// Process available samples</span>
<a name="l00171"></a>00171 ProcessCapturedSamples();
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="comment">// Don't bother the CPU while waiting for more captured data</span>
<a name="l00174"></a>00174 Sleep(0.1f);
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">// Capture is finished : clean up everything</span>
<a name="l00178"></a>00178 CleanUp();
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="comment">// Notify derived class</span>
<a name="l00181"></a>00181 OnStop();
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184
<a name="l00188"></a>00188 <span class="keywordtype">void</span> SoundRecorder::ProcessCapturedSamples()
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 <span class="comment">// Get the number of samples available</span>
<a name="l00191"></a>00191 ALCint SamplesAvailable;
<a name="l00192"></a>00192 alcGetIntegerv(CaptureDevice, ALC_CAPTURE_SAMPLES, 1, &SamplesAvailable);
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (SamplesAvailable > 0)
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 <span class="comment">// Get the recorded samples</span>
<a name="l00197"></a>00197 mySamples.resize(SamplesAvailable);
<a name="l00198"></a>00198 alcCaptureSamples(CaptureDevice, &mySamples[0], SamplesAvailable);
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="comment">// Forward them to the derived class</span>
<a name="l00201"></a>00201 <span class="keywordflow">if</span> (!OnProcessSamples(&mySamples[0], mySamples.size()))
<a name="l00202"></a>00202 {
<a name="l00203"></a>00203 <span class="comment">// The user wants to stop the capture</span>
<a name="l00204"></a>00204 myIsCapturing = <span class="keyword">false</span>;
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208
<a name="l00209"></a>00209
<a name="l00213"></a>00213 <span class="keywordtype">void</span> SoundRecorder::CleanUp()
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="comment">// Stop the capture</span>
<a name="l00216"></a>00216 alcCaptureStop(CaptureDevice);
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="comment">// Get the samples left in the buffer</span>
<a name="l00219"></a>00219 ProcessCapturedSamples();
<a name="l00220"></a>00220
<a name="l00221"></a>00221 <span class="comment">// Close the device</span>
<a name="l00222"></a>00222 alcCaptureCloseDevice(CaptureDevice);
<a name="l00223"></a>00223 CaptureDevice = NULL;
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226 } <span class="comment">// namespace sf</span>
</pre></div></div>
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distrib
>
Mandriva
>
2010.0
>
i586
>
media
>
contrib-release
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by-pkgid
>
ed1483a4d9709d82850bb84cf25535e7
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