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<a href="SpectralCombTriang_8cxx.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * UNIVERSITAT POMPEU FABRA</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This program is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * (at your option) any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * GNU General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * along with this program; if not, write to the Free Software</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "<a class="code" href="SpectralCombTriang_8hxx.html">SpectralCombTriang.hxx</a>"</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="ProcessingFactory_8hxx.html">ProcessingFactory.hxx</a>"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="keyword">namespace </span>CLAM</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> {</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span>Hidden</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> * <a class="code" href="namespaceCLAM_1_1Hidden.html#ab6d3d284c567f8d6be7be419620bc9a0">metadata</a>[] = {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="stringliteral">"key"</span>, <span class="stringliteral">"SpectralCombTriang"</span>,</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="comment">// "category", "Spectral Transformations",</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="comment">// "description", "SpectralCombTriang",</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  0</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  };</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">static</span> FactoryRegistrator<ProcessingFactory, SpectralCombTriang> <a class="code" href="namespaceCLAM_1_1Hidden.html#ad709b2bf7ea595b7f6613c3058471b10">reg</a> = <a class="code" href="namespaceCLAM_1_1Hidden.html#ab6d3d284c567f8d6be7be419620bc9a0">metadata</a>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> }</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="code" href="classCLAM_1_1SpectralCombTriang.html#a140e1eda38008dab9cb58da106c99118"> 40</a></span> <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1SpectralCombTriang.html#ad75359ed51d3d8e77d34020993d8826f" title="Supervised mode execution method (using ports)">SpectralCombTriang::Do</a>(<span class="keyword">const</span> <a class="code" href="classCLAM_1_1Spectrum.html" title="Spectrum is a ProcessingData class that allows the following representations: Mag/Phase, Complex, Polar and Break Point Function (BPF).">Spectrum</a>& in, <a class="code" href="classCLAM_1_1Spectrum.html" title="Spectrum is a ProcessingData class that allows the following representations: Mag/Phase, Complex, Polar and Break Point Function (BPF).">Spectrum</a>& out)</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">if</span> (!<a class="code" href="classCLAM_1_1FrameTransformation.html#aa892cddc0cf728f21f5d3bbcee191499">mConfig</a>.GetPreserveOuts())</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  out = in; <span class="comment">//TODO big cludge for streaming</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inMag = in.GetMagBuffer();</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& outMag = out.GetMagBuffer();</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordtype">int</span> spectrumSize = in.<a class="code" href="classCLAM_1_1Spectrum.html#a03939c4f78fed93b90f4f538417154ad" title="Getter for accessing size of the spectrum.">GetSize</a>();</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> spectralResolution = spectrumSize/in.GetSpectralRange();</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">int</span> fundamental = <a class="code" href="FastRounding_8hxx.html#aa6ef4a5769f2876d924eb589b69e0735">Round</a>(mFundamentalCtl.<a class="code" href="classCLAM_1_1InControl.html#ae20e28c58eff3400515a71aaa5aa4e42" title="Returns the last received value.">GetLastValue</a>()* spectralResolution);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">int</span> n;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  n = 0;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">int</span> bandlimit = fundamental;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">//control expected in dB</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> overallGain = <a class="code" href="CLAM__Math_8hxx.html#a67ef77ef7d2b0fcd52cb4362fc88b1d8" title="Fast "pow" for converting a logarithmic value into linear value ( assumes a log scale factor of 20 )...">log2lin</a>(mAmount.<a class="code" href="classCLAM_1_1InControl.html#ae20e28c58eff3400515a71aaa5aa4e42" title="Returns the last received value.">GetLastValue</a>());</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">for</span>(i = 0; i<spectrumSize; i++)</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span>(i > bandlimit)</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  n++;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  bandlimit = fundamental * n;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  outMag[i] = inMag[i]*GetGain(fundamental, i, n)*overallGain;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> SpectralCombTriang::GetGain(<span class="keywordtype">int</span> fundamental, <span class="keywordtype">int</span> binPos, <span class="keywordtype">int</span> bandNum)</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">//first we find whether the binPos is on a positive or negative slope part</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">//auxiliary data</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> period = fundamental;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">//compute mid point</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">int</span> midPoint = <a class="code" href="classint.html">int</a> (period * 0.5);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">bool</span> ascending = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> ((binPos - fundamental*bandNum)> midPoint || bandNum == 0) ascending = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">//compute linear equation y = ax + b</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">//first the 'a'</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> a = 2/fundamental;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (!ascending) a = -a;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="comment">//now the 'b'</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> b = 1;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span>(ascending) b = 0;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">//now the x</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">int</span> x;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (bandNum==0) x = binPos;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(ascending) x = binPos - <a class="code" href="classint.html">int</a>(fundamental*bandNum + midPoint);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">else</span> x = binPos - <a class="code" href="classint.html">int</a>(fundamental * bandNum);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">//ready to compute the gain</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> a*x + b;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> }</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
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