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<title>libaudiomask: AudioMaskerExample.cpp</title>
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<h1>AudioMaskerExample.cpp</h1><p>This is an example of how to use the <a class="el" href="classAudioMasker.html">AudioMasker</a> class See the example file to work out how to use these Audio masking classes</p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include <math.h></span>
<span class="preprocessor">#include "AudioMasker.H"</span>
<span class="preprocessor">#define INPUTFILENAME "audio.44100.txt"</span>
<span class="preprocessor"></span><span class="preprocessor">#define TMASKFILENAME "fa.t.mask"</span>
<span class="preprocessor"></span><span class="preprocessor">#define POWFILENAME "fa.pow"</span>
<span class="preprocessor"></span><span class="preprocessor">#define EXCITEFILENAME "fa.excite"</span>
<span class="preprocessor"></span><span class="preprocessor">#define THRESHFILENAME "thresh.dat"</span>
<span class="preprocessor"></span><span class="preprocessor">#include <fstream></span>
<span class="keywordtype">int</span> main(<span class="keywordtype">void</span>){
<span class="keywordtype">int</span> sampleCount=1024, halfSampleCount=(int)rint((<span class="keywordtype">double</span>)sampleCount/2.0);
<span class="keywordtype">int</span> count=50, sampleFreq=44100;
<span class="keywordtype">int</span> skip=8192-sampleCount-1;
<span class="keywordtype">double</span> input[sampleCount];
ifstream inputF(INPUTFILENAME);
<span class="keywordtype">int</span> temp;
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<skip;i++)
inputF >> temp >> input[0];
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<sampleCount;i++)
inputF >> temp >> input[i];
inputF.close();
ofstream outputCF(<span class="stringliteral">"cf.dat"</span>);
ofstream outputT(TMASKFILENAME);
ofstream outputP(POWFILENAME);
<span class="comment">// Get our masking function ...</span>
<a name="_a0"></a><a class="code" href="classAudioMasker.html">AudioMasker</a> masker(sampleFreq, count);
<a class="code" href="classAudioMasker.html">AudioMasker</a> masker1(sampleFreq, count);
<a class="code" href="classAudioMasker.html">AudioMasker</a> masker2(sampleFreq, count);
<span class="comment">//AudioMasker masker; // Can also be called like so with default filter banks and sampleFrequency</span>
masker.<a name="a1"></a><a class="code" href="classAudioMasker.html#ae7182941513eab5853dc65ebe03e0529">excite</a>(input, sampleCount);
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=0; j<count;j++){
outputCF <<masker.<a name="a2"></a><a class="code" href="classAudioMasker.html#a5fcc150b323bb9e75a99b4f81fc4d689" title="roex filters">pfb</a>-><a name="a3"></a><a class="code" href="classDepUKFB.html#ad0783de52b1d2ab777484d344e566514" title="The filter centre frequencies.">cf</a>[j]*((double)sampleCount/(<span class="keywordtype">double</span>)sampleFreq)<<<span class="charliteral">'\t'</span>;
outputT << 20*log10(masker.<a name="a4"></a><a class="code" href="classAudioMask.html#ad8c88f5ec9efdeed95affa6c23d25417" title="The audio mask.">mask</a>[j])<<<span class="charliteral">'\t'</span>;
}
outputCF<<endl;
outputT<<endl;
realFFTData fftData(sampleCount);
realFFT fft(&fftData);
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=0; j<sampleCount;j++)
fftData.in[j]=input[j];
fft.fwdTransform();
fftData.compPowerSpec();
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=0; j<sampleCount/2;j++)
outputP<<20*log10(sqrt(fftData.power_spectrum[j]))<<<span class="charliteral">'\t'</span>;
outputP<<endl;
outputCF.close();
outputT.close();
outputP.close();
ofstream outputF(THRESHFILENAME);
<span class="keywordtype">double</span> fact=(double)sampleFreq/((<span class="keywordtype">double</span>)sampleCount-1.0);
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> j=0; j<halfSampleCount;j++){
<span class="comment">// cout<<"finding for freq "<<j*fact<<'\t';</span>
outputF<<20*log10(masker.<a name="a5"></a><a class="code" href="classAudioMasker.html#a13dd56b43780b2e45199c449866f5616">findThreshold</a>(j*fact))<<<span class="charliteral">'\t'</span>;
}
outputF<<endl;
outputF.close();
}
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