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<h1>SoundStream.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/SoundStream.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
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">namespace </span>sf
<a name="l00035"></a>00035 {
<a name="l00039"></a><a class="code" href="classsf_1_1SoundStream.htm#769d08f4c3c6b4340ef3a838329d2e5c">00039</a> <a class="code" href="classsf_1_1SoundStream.htm#769d08f4c3c6b4340ef3a838329d2e5c" title="Default constructor.">SoundStream::SoundStream</a>() :
<a name="l00040"></a>00040 myIsStreaming (false),
<a name="l00041"></a>00041 myChannelsCount (0),
<a name="l00042"></a>00042 mySampleRate (0),
<a name="l00043"></a>00043 myFormat (0),
<a name="l00044"></a>00044 myLoop (false),
<a name="l00045"></a>00045 mySamplesProcessed(0)
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00054"></a><a class="code" href="classsf_1_1SoundStream.htm#5b14ec6669440e4dbd5650f0fb6b0674">00054</a> <a class="code" href="classsf_1_1SoundStream.htm#5b14ec6669440e4dbd5650f0fb6b0674" title="Virtual destructor.">SoundStream::~SoundStream</a>()
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="comment">// Stop the sound if it was playing</span>
<a name="l00057"></a>00057 <a class="code" href="classsf_1_1SoundStream.htm#53c9e9b160bcbcc89c93c1682b4525df" title="Stop playing the audio stream.">Stop</a>();
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059
<a name="l00060"></a>00060
<a name="l00064"></a><a class="code" href="classsf_1_1SoundStream.htm#ed9b6b06c0fa9c2d0b8c094eb2826793">00064</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundStream.htm#ed9b6b06c0fa9c2d0b8c094eb2826793" title="Set the audio stream parameters, you must call it before Play().">SoundStream::Initialize</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ChannelsCount, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> SampleRate)
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 myChannelsCount = ChannelsCount;
<a name="l00067"></a>00067 mySampleRate = SampleRate;
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// Deduce the format from the number of channels</span>
<a name="l00070"></a>00070 myFormat = priv::AudioDevice::GetInstance().GetFormatFromChannelsCount(ChannelsCount);
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// Check if the format is valid</span>
<a name="l00073"></a>00073 <span class="keywordflow">if</span> (myFormat == 0)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 myChannelsCount = 0;
<a name="l00076"></a>00076 mySampleRate = 0;
<a name="l00077"></a>00077 std::cerr << <span class="stringliteral">"Unsupported number of channels ("</span> << myChannelsCount << <span class="stringliteral">")"</span> << std::endl;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00081"></a>00081
<a name="l00085"></a><a class="code" href="classsf_1_1SoundStream.htm#4d8437ef9a952fe3798bd239ff20d9bf">00085</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundStream.htm#4d8437ef9a952fe3798bd239ff20d9bf" title="Start playing the audio stream.">SoundStream::Play</a>()
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="comment">// Check if the sound parameters have been set</span>
<a name="l00088"></a>00088 <span class="keywordflow">if</span> (myFormat == 0)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 std::cerr << <span class="stringliteral">"Failed to play audio stream : sound parameters have not been initialized (call Initialize first)"</span> << std::endl;
<a name="l00091"></a>00091 <span class="keywordflow">return</span>;
<a name="l00092"></a>00092 }
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">// If the sound is already playing (probably paused), just resume it</span>
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (myIsStreaming)
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <a class="code" href="classsf_1_1SoundStream.htm#4d8437ef9a952fe3798bd239ff20d9bf" title="Start playing the audio stream.">Sound::Play</a>();
<a name="l00098"></a>00098 <span class="keywordflow">return</span>;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">// Notify the derived class</span>
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (OnStart())
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="comment">// Start updating the stream in a separate thread to avoid blocking the application</span>
<a name="l00105"></a>00105 mySamplesProcessed = 0;
<a name="l00106"></a>00106 myIsStreaming = <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_1SoundStream.htm#53c9e9b160bcbcc89c93c1682b4525df">00115</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundStream.htm#53c9e9b160bcbcc89c93c1682b4525df" title="Stop playing the audio stream.">SoundStream::Stop</a>()
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="comment">// Wait for the thread to terminate</span>
<a name="l00118"></a>00118 myIsStreaming = <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_1SoundStream.htm#bdcb5c8f3b5884a27e2eb013f5e36858">00126</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classsf_1_1SoundStream.htm#bdcb5c8f3b5884a27e2eb013f5e36858" title="Return the number of channels (1 = mono, 2 = stereo).">SoundStream::GetChannelsCount</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> myChannelsCount;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131
<a name="l00135"></a><a class="code" href="classsf_1_1SoundStream.htm#74dabd1177bb60c8bd64bb6bbedb64bc">00135</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="classsf_1_1SoundStream.htm#74dabd1177bb60c8bd64bb6bbedb64bc" title="Get the stream sample rate.">SoundStream::GetSampleRate</a>()<span class="keyword"> const</span>
<a name="l00136"></a>00136 <span class="keyword"></span>{
<a name="l00137"></a>00137 <span class="keywordflow">return</span> mySampleRate;
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00140"></a>00140
<a name="l00144"></a><a class="code" href="classsf_1_1SoundStream.htm#cef2468ca4bc3e8ced76b11fb95c7ef2">00144</a> <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b9622195" title="Enumeration of the sound states.">Sound::Status</a> <a class="code" href="classsf_1_1SoundStream.htm#cef2468ca4bc3e8ced76b11fb95c7ef2" title="Get the status of the stream (stopped, paused, playing).">SoundStream::GetStatus</a>()<span class="keyword"> const</span>
<a name="l00145"></a>00145 <span class="keyword"></span>{
<a name="l00146"></a>00146 <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b9622195" title="Enumeration of the sound states.">Status</a> <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b9622195" title="Enumeration of the sound states.">Status</a> = <a class="code" href="classsf_1_1SoundStream.htm#cef2468ca4bc3e8ced76b11fb95c7ef2" title="Get the status of the stream (stopped, paused, playing).">Sound::GetStatus</a>();
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">// To compensate for the lag between Play() and alSourcePlay()</span>
<a name="l00149"></a>00149 <span class="keywordflow">if</span> ((Status == <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b962219539fd53aa83db9189ca2fff82e0553cf9" title="Sound is not playing.">Stopped</a>) && myIsStreaming)
<a name="l00150"></a>00150 Status = <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b962219516657b221888cf11e2a076f5b2783288" title="Sound is playing.">Playing</a>;
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="keywordflow">return</span> Status;
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154
<a name="l00155"></a>00155
<a name="l00162"></a><a class="code" href="classsf_1_1SoundStream.htm#d11fee9eb4baba68d6ed9f44bc6170ac">00162</a> <span class="keywordtype">float</span> <a class="code" href="classsf_1_1SoundStream.htm#d11fee9eb4baba68d6ed9f44bc6170ac" title="Get the current playing position of the stream.">SoundStream::GetPlayingOffset</a>()<span class="keyword"> const</span>
<a name="l00163"></a>00163 <span class="keyword"></span>{
<a name="l00164"></a>00164 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SoundStream.htm#d11fee9eb4baba68d6ed9f44bc6170ac" title="Get the current playing position of the stream.">Sound::GetPlayingOffset</a>() + <span class="keyword">static_cast<</span><span class="keywordtype">float</span><span class="keyword">></span>(mySamplesProcessed) / mySampleRate / myChannelsCount;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167
<a name="l00171"></a><a class="code" href="classsf_1_1SoundStream.htm#1072090152b10d83f43f0cd6bbd82b4e">00171</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SoundStream.htm#1072090152b10d83f43f0cd6bbd82b4e" title="Set the stream loop state.">SoundStream::SetLoop</a>(<span class="keywordtype">bool</span> Loop)
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 myLoop = Loop;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175
<a name="l00176"></a>00176
<a name="l00180"></a><a class="code" href="classsf_1_1SoundStream.htm#caecb1c68af4a9d75f9e9ad2d42afa78">00180</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SoundStream.htm#caecb1c68af4a9d75f9e9ad2d42afa78" title="Tell whether or not the stream is looping.">SoundStream::GetLoop</a>()<span class="keyword"> const</span>
<a name="l00181"></a>00181 <span class="keyword"></span>{
<a name="l00182"></a>00182 <span class="keywordflow">return</span> myLoop;
<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> SoundStream::Run()
<a name="l00190"></a>00190 {
<a name="l00191"></a>00191 <span class="comment">// Create the buffers</span>
<a name="l00192"></a>00192 ALCheck(alGenBuffers(BuffersCount, myBuffers));
<a name="l00193"></a>00193 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < BuffersCount; ++i)
<a name="l00194"></a>00194 myEndBuffers[i] = <span class="keyword">false</span>;
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="comment">// Fill the queue</span>
<a name="l00197"></a>00197 <span class="keywordtype">bool</span> RequestStop = FillQueue();
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="comment">// Play the sound</span>
<a name="l00200"></a>00200 <a class="code" href="classsf_1_1SoundStream.htm#4d8437ef9a952fe3798bd239ff20d9bf" title="Start playing the audio stream.">Sound::Play</a>();
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <span class="keywordflow">while</span> (myIsStreaming)
<a name="l00203"></a>00203 {
<a name="l00204"></a>00204 <span class="comment">// The stream has been interrupted !</span>
<a name="l00205"></a>00205 <span class="keywordflow">if</span> (<a class="code" href="classsf_1_1Sound.htm#76c97fca3a5092db606eb66461f063af" title="Get the status of the sound (stopped, paused, playing).">Sound::GetStatus</a>() == <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b962219539fd53aa83db9189ca2fff82e0553cf9" title="Sound is not playing.">Stopped</a>)
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <span class="keywordflow">if</span> (!RequestStop)
<a name="l00208"></a>00208 {
<a name="l00209"></a>00209 <span class="comment">// Just continue</span>
<a name="l00210"></a>00210 <a class="code" href="classsf_1_1SoundStream.htm#4d8437ef9a952fe3798bd239ff20d9bf" title="Start playing the audio stream.">Sound::Play</a>();
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212 <span class="keywordflow">else</span>
<a name="l00213"></a>00213 {
<a name="l00214"></a>00214 <span class="comment">// End streaming</span>
<a name="l00215"></a>00215 myIsStreaming = <span class="keyword">false</span>;
<a name="l00216"></a>00216 }
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <span class="comment">// Get the number of buffers that have been processed (ie. ready for reuse)</span>
<a name="l00220"></a>00220 ALint NbProcessed;
<a name="l00221"></a>00221 ALCheck(alGetSourcei(Sound::mySource, AL_BUFFERS_PROCESSED, &NbProcessed));
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordflow">while</span> (NbProcessed--)
<a name="l00224"></a>00224 {
<a name="l00225"></a>00225 <span class="comment">// Pop the first unused buffer from the queue</span>
<a name="l00226"></a>00226 ALuint Buffer;
<a name="l00227"></a>00227 ALCheck(alSourceUnqueueBuffers(Sound::mySource, 1, &Buffer));
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="comment">// Find its number</span>
<a name="l00230"></a>00230 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> BufferNum = 0;
<a name="l00231"></a>00231 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < BuffersCount; ++i)
<a name="l00232"></a>00232 <span class="keywordflow">if</span> (myBuffers[i] == Buffer)
<a name="l00233"></a>00233 {
<a name="l00234"></a>00234 BufferNum = i;
<a name="l00235"></a>00235 <span class="keywordflow">break</span>;
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237
<a name="l00238"></a>00238 <span class="comment">// Retrieve its size and add it to the samples count</span>
<a name="l00239"></a>00239 <span class="keywordflow">if</span> (myEndBuffers[BufferNum])
<a name="l00240"></a>00240 {
<a name="l00241"></a>00241 <span class="comment">// This was the last buffer: reset the sample count</span>
<a name="l00242"></a>00242 mySamplesProcessed = 0;
<a name="l00243"></a>00243 myEndBuffers[BufferNum] = <span class="keyword">false</span>;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245 <span class="keywordflow">else</span>
<a name="l00246"></a>00246 {
<a name="l00247"></a>00247 ALint Size;
<a name="l00248"></a>00248 ALCheck(alGetBufferi(Buffer, AL_SIZE, &Size));
<a name="l00249"></a>00249 mySamplesProcessed += Size / <span class="keyword">sizeof</span>(Int16);
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <span class="comment">// Fill it and push it back into the playing queue</span>
<a name="l00253"></a>00253 <span class="keywordflow">if</span> (!RequestStop)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 <span class="keywordflow">if</span> (FillAndPushBuffer(BufferNum))
<a name="l00256"></a>00256 RequestStop = <span class="keyword">true</span>;
<a name="l00257"></a>00257 }
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a>00260 <span class="comment">// Leave some time for the other threads if the stream is still playing</span>
<a name="l00261"></a>00261 <span class="keywordflow">if</span> (<a class="code" href="classsf_1_1Sound.htm#76c97fca3a5092db606eb66461f063af" title="Get the status of the sound (stopped, paused, playing).">Sound::GetStatus</a>() != <a class="code" href="classsf_1_1Sound.htm#28ad2186cde78fed2c79c867b962219539fd53aa83db9189ca2fff82e0553cf9" title="Sound is not playing.">Stopped</a>)
<a name="l00262"></a>00262 Sleep(0.1f);
<a name="l00263"></a>00263 }
<a name="l00264"></a>00264
<a name="l00265"></a>00265 <span class="comment">// Stop the playback</span>
<a name="l00266"></a>00266 <a class="code" href="classsf_1_1SoundStream.htm#53c9e9b160bcbcc89c93c1682b4525df" title="Stop playing the audio stream.">Sound::Stop</a>();
<a name="l00267"></a>00267
<a name="l00268"></a>00268 <span class="comment">// Unqueue any buffer left in the queue</span>
<a name="l00269"></a>00269 ClearQueue();
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="comment">// Delete the buffers</span>
<a name="l00272"></a>00272 ALCheck(alSourcei(Sound::mySource, AL_BUFFER, 0));
<a name="l00273"></a>00273 ALCheck(alDeleteBuffers(BuffersCount, myBuffers));
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275
<a name="l00276"></a>00276
<a name="l00281"></a>00281 <span class="keywordtype">bool</span> SoundStream::FillAndPushBuffer(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> BufferNum)
<a name="l00282"></a>00282 {
<a name="l00283"></a>00283 <span class="keywordtype">bool</span> RequestStop = <span class="keyword">false</span>;
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="comment">// Acquire audio data</span>
<a name="l00286"></a>00286 Chunk Data = {NULL, 0};
<a name="l00287"></a>00287 <span class="keywordflow">if</span> (!OnGetData(Data))
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 <span class="comment">// Mark the buffer as the last one (so that we know when to reset the playing position)</span>
<a name="l00290"></a>00290 myEndBuffers[BufferNum] = <span class="keyword">true</span>;
<a name="l00291"></a>00291
<a name="l00292"></a>00292 <span class="comment">// Check if the stream must loop or stop</span>
<a name="l00293"></a>00293 <span class="keywordflow">if</span> (myLoop && OnStart())
<a name="l00294"></a>00294 {
<a name="l00295"></a>00295 <span class="comment">// If we succeeded to restart and we previously had no data, try to fill the buffer once again</span>
<a name="l00296"></a>00296 <span class="keywordflow">if</span> (!Data.Samples || (Data.NbSamples == 0))
<a name="l00297"></a>00297 {
<a name="l00298"></a>00298 <span class="keywordflow">return</span> FillAndPushBuffer(BufferNum);
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300 }
<a name="l00301"></a>00301 <span class="keywordflow">else</span>
<a name="l00302"></a>00302 {
<a name="l00303"></a>00303 <span class="comment">// Not looping or restart failed: request stop</span>
<a name="l00304"></a>00304 RequestStop = <span class="keyword">true</span>;
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="comment">// Fill the buffer if some data was returned</span>
<a name="l00309"></a>00309 <span class="keywordflow">if</span> (Data.Samples && Data.NbSamples)
<a name="l00310"></a>00310 {
<a name="l00311"></a>00311 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Buffer = myBuffers[BufferNum];
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="comment">// Fill the buffer</span>
<a name="l00314"></a>00314 ALsizei Size = <span class="keyword">static_cast<</span>ALsizei<span class="keyword">></span>(Data.NbSamples) * <span class="keyword">sizeof</span>(Int16);
<a name="l00315"></a>00315 ALCheck(alBufferData(Buffer, myFormat, Data.Samples, Size, mySampleRate));
<a name="l00316"></a>00316
<a name="l00317"></a>00317 <span class="comment">// Push it into the sound queue</span>
<a name="l00318"></a>00318 ALCheck(alSourceQueueBuffers(Sound::mySource, 1, &Buffer));
<a name="l00319"></a>00319 }
<a name="l00320"></a>00320
<a name="l00321"></a>00321 <span class="keywordflow">return</span> RequestStop;
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323
<a name="l00324"></a>00324
<a name="l00328"></a>00328 <span class="keywordtype">bool</span> SoundStream::FillQueue()
<a name="l00329"></a>00329 {
<a name="l00330"></a>00330 <span class="comment">// Fill and enqueue all the available buffers</span>
<a name="l00331"></a>00331 <span class="keywordtype">bool</span> RequestStop = <span class="keyword">false</span>;
<a name="l00332"></a>00332 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; (i < BuffersCount) && !RequestStop; ++i)
<a name="l00333"></a>00333 {
<a name="l00334"></a>00334 <span class="keywordflow">if</span> (FillAndPushBuffer(i))
<a name="l00335"></a>00335 RequestStop = <span class="keyword">true</span>;
<a name="l00336"></a>00336 }
<a name="l00337"></a>00337
<a name="l00338"></a>00338 <span class="keywordflow">return</span> RequestStop;
<a name="l00339"></a>00339 }
<a name="l00340"></a>00340
<a name="l00341"></a>00341
<a name="l00345"></a>00345 <span class="keywordtype">void</span> SoundStream::ClearQueue()
<a name="l00346"></a>00346 {
<a name="l00347"></a>00347 <span class="comment">// Get the number of buffers still in the queue</span>
<a name="l00348"></a>00348 ALint NbQueued;
<a name="l00349"></a>00349 ALCheck(alGetSourcei(Sound::mySource, AL_BUFFERS_QUEUED, &NbQueued));
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="comment">// Unqueue them all</span>
<a name="l00352"></a>00352 ALuint Buffer;
<a name="l00353"></a>00353 <span class="keywordflow">for</span> (ALint i = 0; i < NbQueued; ++i)
<a name="l00354"></a>00354 ALCheck(alSourceUnqueueBuffers(Sound::mySource, 1, &Buffer));
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356
<a name="l00357"></a>00357
<a name="l00361"></a>00361 <span class="keywordtype">bool</span> SoundStream::OnStart()
<a name="l00362"></a>00362 {
<a name="l00363"></a>00363 <span class="comment">// Does nothing by default</span>
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367
<a name="l00368"></a>00368 } <span class="comment">// namespace sf</span>
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