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<h1>Modulate.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef STK_MODULATE_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define STK_MODULATE_H</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include "Generator.h"</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include "SineWave.h"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "Noise.h"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "OnePole.h"</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009 <span class="keyword">namespace </span>stk {
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">/***************************************************/</span>
<a name="l00021"></a>00021 <span class="comment">/***************************************************/</span>
<a name="l00022"></a>00022
<a name="l00023"></a><a class="code" href="classstk_1_1Modulate.html">00023</a> <span class="keyword">class </span><a class="code" href="classstk_1_1Modulate.html" title="STK periodic/random modulator.">Modulate</a> : <span class="keyword">public</span> <a class="code" href="classstk_1_1Generator.html" title="STK abstract unit generator parent class.">Generator</a>
<a name="l00024"></a>00024 {
<a name="l00025"></a>00025 <span class="keyword">public</span>:
<a name="l00027"></a>00027
<a name="l00030"></a>00030 <a class="code" href="classstk_1_1Modulate.html#a96812173415bfb086f5d8d738f4d0c2e" title="Class constructor.">Modulate</a>( <span class="keywordtype">void</span> );
<a name="l00031"></a>00031
<a name="l00033"></a>00033 <a class="code" href="classstk_1_1Modulate.html#add541ec0d037a21bd236b5790878d060" title="Class destructor.">~Modulate</a>( <span class="keywordtype">void</span> );
<a name="l00034"></a>00034
<a name="l00036"></a><a class="code" href="classstk_1_1Modulate.html#a6cb78fe2dec3bebf2586764421556706">00036</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Modulate.html#a6cb78fe2dec3bebf2586764421556706" title="Reset internal state.">reset</a>( <span class="keywordtype">void</span> ) { lastFrame_[0] = 0.0; };
<a name="l00037"></a>00037
<a name="l00039"></a><a class="code" href="classstk_1_1Modulate.html#a298b25f4b7cc56f2dffae5474a05999d">00039</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Modulate.html#a298b25f4b7cc56f2dffae5474a05999d" title="Set the periodic (vibrato) rate or frequency in Hz.">setVibratoRate</a>( StkFloat rate ) { vibrato_.<a class="code" href="classstk_1_1SineWave.html#a1047a43714bc2e40c7e31e8f7e34adbc" title="Set the data interpolation rate based on a looping frequency.">setFrequency</a>( rate ); };
<a name="l00040"></a>00040
<a name="l00042"></a><a class="code" href="classstk_1_1Modulate.html#a08f2d489a3fba3a10d1f301aed869ed4">00042</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Modulate.html#a08f2d489a3fba3a10d1f301aed869ed4" title="Set the periodic (vibrato) gain.">setVibratoGain</a>( StkFloat gain ) { vibratoGain_ = gain; };
<a name="l00043"></a>00043
<a name="l00045"></a>00045 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Modulate.html#ac6e7a02378facf59916f2460ed5c2fa5" title="Set the random modulation gain.">setRandomGain</a>( StkFloat gain );
<a name="l00046"></a>00046
<a name="l00048"></a><a class="code" href="classstk_1_1Modulate.html#addf73f58590ab082f106c9745c5bedc9">00048</a> StkFloat <a class="code" href="classstk_1_1Modulate.html#addf73f58590ab082f106c9745c5bedc9" title="Return the last computed output value.">lastOut</a>( <span class="keywordtype">void</span> )<span class="keyword"> const </span>{ <span class="keywordflow">return</span> lastFrame_[0]; };
<a name="l00049"></a>00049
<a name="l00051"></a>00051 StkFloat <a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d" title="Compute and return one output sample.">tick</a>( <span class="keywordtype">void</span> );
<a name="l00052"></a>00052
<a name="l00054"></a>00054
<a name="l00061"></a>00061 <a class="code" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a>& <a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d" title="Compute and return one output sample.">tick</a>( <a class="code" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a>& frames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel = 0 );
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keyword">protected</span>:
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keywordtype">void</span> sampleRateChanged( StkFloat newRate, StkFloat oldRate );
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <a class="code" href="classstk_1_1SineWave.html" title="STK sinusoid oscillator class.">SineWave</a> vibrato_;
<a name="l00068"></a>00068 <a class="code" href="classstk_1_1Noise.html" title="STK noise generator.">Noise</a> noise_;
<a name="l00069"></a>00069 <a class="code" href="classstk_1_1OnePole.html" title="STK one-pole filter class.">OnePole</a> filter_;
<a name="l00070"></a>00070 StkFloat vibratoGain_;
<a name="l00071"></a>00071 StkFloat randomGain_;
<a name="l00072"></a>00072 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> noiseRate_;
<a name="l00073"></a>00073 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> noiseCounter_;
<a name="l00074"></a>00074
<a name="l00075"></a>00075 };
<a name="l00076"></a>00076
<a name="l00077"></a><a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d">00077</a> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d" title="Compute and return one output sample.">Modulate :: tick</a>( <span class="keywordtype">void</span> )
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 <span class="comment">// Compute periodic and random modulations.</span>
<a name="l00080"></a>00080 lastFrame_[0] = vibratoGain_ * vibrato_.<a class="code" href="classstk_1_1SineWave.html#a31a55627bf8064919b5e063059260eda" title="Compute and return one output sample.">tick</a>();
<a name="l00081"></a>00081 <span class="keywordflow">if</span> ( noiseCounter_++ >= noiseRate_ ) {
<a name="l00082"></a>00082 noise_.<a class="code" href="classstk_1_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" title="Compute and return one output sample.">tick</a>();
<a name="l00083"></a>00083 noiseCounter_ = 0;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085 lastFrame_[0] += filter_.<a class="code" href="classstk_1_1OnePole.html#a3c83b6d43f76bec06f11caa9de76881e" title="Input one sample to the filter and return one output.">tick</a>( noise_.<a class="code" href="classstk_1_1Noise.html#a1d6c8ed80425cd0cea014bd2e328c823" title="Return the last computed output value.">lastOut</a>() );
<a name="l00086"></a>00086 <span class="keywordflow">return</span> lastFrame_[0];
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a><a class="code" href="classstk_1_1Modulate.html#a942eee1bb78318e1b59afeb311748b2d">00089</a> <span class="keyword">inline</span> <a class="code" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a>& <a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d" title="Compute and return one output sample.">Modulate :: tick</a>( <a class="code" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a>& frames, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel )
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00092"></a>00092 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( channel >= frames.<a class="code" href="classstk_1_1StkFrames.html#aec7ef9c46675a24111aa6e2fda3ba870" title="Return the number of channels represented by the data.">channels</a>() ) {
<a name="l00093"></a>00093 oStream_ << <span class="stringliteral">"Modulate::tick(): channel and StkFrames arguments are incompatible!"</span>;
<a name="l00094"></a>00094 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 <span class="preprocessor">#endif</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span>
<a name="l00098"></a>00098 StkFloat *samples = &frames[channel];
<a name="l00099"></a>00099 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> hop = frames.<a class="code" href="classstk_1_1StkFrames.html#aec7ef9c46675a24111aa6e2fda3ba870" title="Return the number of channels represented by the data.">channels</a>();
<a name="l00100"></a>00100 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<frames.<a class="code" href="classstk_1_1StkFrames.html#a05b1ab6fa750a8221a7d65c30e0cdab9" title="Return the number of sample frames represented by the data.">frames</a>(); i++, samples += hop )
<a name="l00101"></a>00101 *samples = <a class="code" href="classstk_1_1Modulate.html#a237b96dd553d65253abbf00a186e293d" title="Compute and return one output sample.">Modulate::tick</a>();
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">return</span> frames;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 } <span class="comment">// stk namespace</span>
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="preprocessor">#endif</span>
</pre></div></div>
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<tr><td><A HREF="http://ccrma.stanford.edu/software/stk/"><I>The Synthesis ToolKit in C++ (STK)</I></A></td></tr>
<tr><td>©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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