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<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
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<h1>Noise.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef STK_NOISE_H</span>
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<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define STK_NOISE_H</span>
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<a name="l00003"></a>00003 <span class="preprocessor"></span>
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<a name="l00004"></a>00004 <span class="preprocessor">#include "Generator.h"</span>
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<a name="l00005"></a>00005 <span class="preprocessor">#include <stdlib.h></span>
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<a name="l00006"></a>00006
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<a name="l00007"></a>00007 <span class="keyword">namespace </span>stk {
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<a name="l00008"></a>00008
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<a name="l00009"></a>00009 <span class="comment">/***************************************************/</span>
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<a name="l00019"></a>00019 <span class="comment">/***************************************************/</span>
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<a name="l00020"></a>00020
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<a name="l00021"></a><a class="code" href="classstk_1_1Noise.html">00021</a> <span class="keyword">class </span><a class="code" href="classstk_1_1Noise.html" title="STK noise generator.">Noise</a> : <span class="keyword">public</span> <a class="code" href="classstk_1_1Generator.html" title="STK abstract unit generator parent class.">Generator</a>
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<a name="l00022"></a>00022 {
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<a name="l00023"></a>00023 <span class="keyword">public</span>:
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<a name="l00024"></a>00024
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<a name="l00026"></a>00026
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<a name="l00030"></a>00030 <a class="code" href="classstk_1_1Noise.html#a2d442a08883be25f10952dff4e515f98" title="Default constructor that can also take a specific seed value.">Noise</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seed = 0 );
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<a name="l00031"></a>00031
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<a name="l00033"></a>00033
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<a name="l00037"></a>00037 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Noise.html#a9507ae6eb261c577a64b4ecb5c1805dc" title="Seed the random number generator with a specific seed value.">setSeed</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seed = 0 );
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<a name="l00038"></a>00038
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<a name="l00040"></a><a class="code" href="classstk_1_1Noise.html#a1d6c8ed80425cd0cea014bd2e328c823">00040</a> StkFloat <a class="code" href="classstk_1_1Noise.html#a1d6c8ed80425cd0cea014bd2e328c823" 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]; };
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<a name="l00041"></a>00041
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<a name="l00043"></a>00043 StkFloat <a class="code" href="classstk_1_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" title="Compute and return one output sample.">tick</a>( <span class="keywordtype">void</span> );
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<a name="l00044"></a>00044
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<a name="l00046"></a>00046
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<a name="l00053"></a>00053 <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_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" 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 );
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<a name="l00054"></a>00054
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<a name="l00055"></a>00055 <span class="keyword">protected</span>:
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<a name="l00056"></a>00056
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<a name="l00057"></a>00057 };
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<a name="l00058"></a>00058
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<a name="l00059"></a><a class="code" href="classstk_1_1Noise.html#a8ac40f69475eb744e803d557e8438a6d">00059</a> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" title="Compute and return one output sample.">Noise :: tick</a>( <span class="keywordtype">void</span> )
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<a name="l00060"></a>00060 {
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<a name="l00061"></a>00061 <span class="keywordflow">return</span> lastFrame_[0] = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
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<a name="l00062"></a>00062 }
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<a name="l00063"></a>00063
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<a name="l00064"></a><a class="code" href="classstk_1_1Noise.html#a2f92e91787dc19309305cf246632cd50">00064</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_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" title="Compute and return one output sample.">Noise :: 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 )
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<a name="l00065"></a>00065 {
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<a name="l00066"></a>00066 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
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<a name="l00067"></a>00067 <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>() ) {
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<a name="l00068"></a>00068 oStream_ << <span class="stringliteral">"Noise::tick(): channel and StkFrames arguments are incompatible!"</span>;
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<a name="l00069"></a>00069 <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 );
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<a name="l00070"></a>00070 }
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<a name="l00071"></a>00071 <span class="preprocessor">#endif</span>
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<a name="l00072"></a>00072 <span class="preprocessor"></span>
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<a name="l00073"></a>00073 StkFloat *samples = &frames[channel];
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<a name="l00074"></a>00074 <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>();
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<a name="l00075"></a>00075 <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 )
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<a name="l00076"></a>00076 *samples = (StkFloat) ( 2.0 * rand() / (RAND_MAX + 1.0) - 1.0 );
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<a name="l00077"></a>00077
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<a name="l00078"></a>00078 lastFrame_[0] = *(samples-hop);
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<a name="l00079"></a>00079 <span class="keywordflow">return</span> frames;
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<a name="l00080"></a>00080 }
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<a name="l00081"></a>00081
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<a name="l00082"></a>00082 } <span class="comment">// stk namespace</span>
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<a name="l00083"></a>00083
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<a name="l00084"></a>00084 <span class="preprocessor">#endif</span>
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</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>
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<tr><td>©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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