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<h1>Resonate.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef STK_RESONATE_H</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define STK_RESONATE_H</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00004"></a>00004 <span class="preprocessor">#include "Instrmnt.h"</span>
<a name="l00005"></a>00005 <span class="preprocessor">#include "ADSR.h"</span>
<a name="l00006"></a>00006 <span class="preprocessor">#include "BiQuad.h"</span>
<a name="l00007"></a>00007 <span class="preprocessor">#include "Noise.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="l00028"></a>00028 <span class="comment">/***************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a><a class="code" href="classstk_1_1Resonate.html">00030</a> <span class="keyword">class </span><a class="code" href="classstk_1_1Resonate.html" title="STK noise driven formant filter.">Resonate</a> : <span class="keyword">public</span> <a class="code" href="classstk_1_1Instrmnt.html" title="STK instrument abstract base class.">Instrmnt</a>
<a name="l00031"></a>00031 {
<a name="l00032"></a>00032 <span class="keyword">public</span>:
<a name="l00034"></a>00034 <a class="code" href="classstk_1_1Resonate.html#ab273b41ec296f776a41cfa66bb1e430e" title="Class constructor.">Resonate</a>( <span class="keywordtype">void</span> );
<a name="l00035"></a>00035
<a name="l00037"></a>00037 <a class="code" href="classstk_1_1Resonate.html#a634ab2db8eabad147fa90fb1bf72a580" title="Class destructor.">~Resonate</a>( <span class="keywordtype">void</span> );
<a name="l00038"></a>00038
<a name="l00040"></a>00040 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#a534740efbbde171d790309e85c96017d" title="Reset and clear all internal state.">clear</a>( <span class="keywordtype">void</span> );
<a name="l00041"></a>00041
<a name="l00043"></a>00043 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#a8767e6c05862c183483776ac4cf354f9" title="Set the filter for a resonance at the given frequency (Hz) and radius.">setResonance</a>( StkFloat frequency, StkFloat radius );
<a name="l00044"></a>00044
<a name="l00046"></a>00046 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#ad4476301fba545cbbfc773150ca6901d" title="Set the filter for a notch at the given frequency (Hz) and radius.">setNotch</a>( StkFloat frequency, StkFloat radius );
<a name="l00047"></a>00047
<a name="l00049"></a><a class="code" href="classstk_1_1Resonate.html#ad8000ad734634ac7334f4fab09a13a7e">00049</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#ad8000ad734634ac7334f4fab09a13a7e" title="Set the filter zero coefficients for contant resonance gain.">setEqualGainZeroes</a>( <span class="keywordtype">void</span> ) { filter_.<a class="code" href="classstk_1_1BiQuad.html#a28881f5876ce5bdcc846367cca9363f7" title="Sets the filter zeroes for equal resonance gain.">setEqualGainZeroes</a>(); };
<a name="l00050"></a>00050
<a name="l00052"></a><a class="code" href="classstk_1_1Resonate.html#afebf784a302eb0043b4a453b0d1d852c">00052</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#afebf784a302eb0043b4a453b0d1d852c" title="Initiate the envelope with a key-on event.">keyOn</a>( <span class="keywordtype">void</span> ) { adsr_.<a class="code" href="classstk_1_1ADSR.html#aad03e82009a20cfb49c1f04bae791631" title="Set target = 1, state = ADSR::ATTACK.">keyOn</a>(); };
<a name="l00053"></a>00053
<a name="l00055"></a><a class="code" href="classstk_1_1Resonate.html#a0008e1fdd7611b769b72b52c8bfb1e6a">00055</a> <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#a0008e1fdd7611b769b72b52c8bfb1e6a" title="Signal a key-off event to the envelope.">keyOff</a>( <span class="keywordtype">void</span> ) { adsr_.<a class="code" href="classstk_1_1ADSR.html#a9400e04b313ab8900a3ba9b693f448e6" title="Set target = 0, state = ADSR::RELEASE.">keyOff</a>(); };
<a name="l00056"></a>00056
<a name="l00058"></a>00058 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#a76bfadc70f4163f9767e7864d322d144" title="Start a note with the given frequency and amplitude.">noteOn</a>( StkFloat frequency, StkFloat amplitude );
<a name="l00059"></a>00059
<a name="l00061"></a>00061 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#a0454a8e9d6ef3a2394b6c348edf0195f" title="Stop a note with the given amplitude (speed of decay).">noteOff</a>( StkFloat amplitude );
<a name="l00062"></a>00062
<a name="l00064"></a>00064 <span class="keywordtype">void</span> <a class="code" href="classstk_1_1Resonate.html#af55feabf25f1f6f996c32574656ffd68" title="Perform the control change specified by number and value (0.0 - 128.0).">controlChange</a>( <span class="keywordtype">int</span> number, StkFloat value );
<a name="l00065"></a>00065
<a name="l00067"></a>00067 StkFloat <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> channel = 0 );
<a name="l00068"></a>00068
<a name="l00070"></a>00070
<a name="l00077"></a>00077 <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_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" 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="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keyword">protected</span>:
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <a class="code" href="classstk_1_1ADSR.html" title="STK ADSR envelope class.">ADSR</a> adsr_;
<a name="l00082"></a>00082 <a class="code" href="classstk_1_1BiQuad.html" title="STK biquad (two-pole, two-zero) filter class.">BiQuad</a> filter_;
<a name="l00083"></a>00083 <a class="code" href="classstk_1_1Noise.html" title="STK noise generator.">Noise</a> noise_;
<a name="l00084"></a>00084 StkFloat poleFrequency_;
<a name="l00085"></a>00085 StkFloat poleRadius_;
<a name="l00086"></a>00086 StkFloat zeroFrequency_;
<a name="l00087"></a>00087 StkFloat zeroRadius_;
<a name="l00088"></a>00088
<a name="l00089"></a>00089 };
<a name="l00090"></a>00090
<a name="l00091"></a><a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98">00091</a> <span class="keyword">inline</span> StkFloat <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">Resonate :: tick</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> )
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 lastFrame_[0] = filter_.<a class="code" href="classstk_1_1BiQuad.html#a648086962c3cddcaa09c46a002c3e635" title="Input one sample to the filter and return a reference to one output.">tick</a>( noise_.<a class="code" href="classstk_1_1Noise.html#a8ac40f69475eb744e803d557e8438a6d" title="Compute and return one output sample.">tick</a>() );
<a name="l00094"></a>00094 lastFrame_[0] *= adsr_.<a class="code" href="classstk_1_1ADSR.html#af2c0869f86210a55f4f668172373c975" title="Compute and return one output sample.">tick</a>();
<a name="l00095"></a>00095 <span class="keywordflow">return</span> lastFrame_[0];
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00098"></a><a class="code" href="classstk_1_1Resonate.html#aeefb870c1eeb430160fdca374e8324b3">00098</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_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">Resonate :: 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="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nChannels = lastFrame_.<a class="code" href="classstk_1_1StkFrames.html#aec7ef9c46675a24111aa6e2fda3ba870" title="Return the number of channels represented by the data.">channels</a>();
<a name="l00101"></a>00101 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00102"></a>00102 <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>() - nChannels ) {
<a name="l00103"></a>00103 oStream_ << <span class="stringliteral">"Resonate::tick(): channel and StkFrames arguments are incompatible!"</span>;
<a name="l00104"></a>00104 <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="l00105"></a>00105 }
<a name="l00106"></a>00106 <span class="preprocessor">#endif</span>
<a name="l00107"></a>00107 <span class="preprocessor"></span>
<a name="l00108"></a>00108 StkFloat *samples = &frames[channel];
<a name="l00109"></a>00109 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j, hop = frames.<a class="code" href="classstk_1_1StkFrames.html#aec7ef9c46675a24111aa6e2fda3ba870" title="Return the number of channels represented by the data.">channels</a>() - nChannels;
<a name="l00110"></a>00110 <span class="keywordflow">if</span> ( nChannels == 1 ) {
<a name="l00111"></a>00111 <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="l00112"></a>00112 *samples++ = <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">tick</a>();
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 <span class="keywordflow">else</span> {
<a name="l00115"></a>00115 <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="l00116"></a>00116 *samples++ = <a class="code" href="classstk_1_1Resonate.html#ab917279f4f57d5d305481426e9bffd98" title="Compute and return one output sample.">tick</a>();
<a name="l00117"></a>00117 <span class="keywordflow">for</span> ( j=1; j<nChannels; j++ )
<a name="l00118"></a>00118 *samples++ = lastFrame_[j];
<a name="l00119"></a>00119 }
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="keywordflow">return</span> frames;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a>00125 } <span class="comment">// stk namespace</span>
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="preprocessor">#endif</span>
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