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<a href="Normalization_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> <span class="preprocessor">#include "<a class="code" href="DataTypes_8hxx.html">DataTypes.hxx</a>"</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "<a class="code" href="CLAM__Math_8hxx.html">CLAM_Math.hxx</a>"</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "<a class="code" href="Normalization_8hxx.html">Normalization.hxx</a>"</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="Stats_8hxx.html">Stats.hxx</a>"</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </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>CLAM</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> </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="code" href="classCLAM_1_1NormalizationConfig.html#a41eb3b5c4f3b5a670588decf51989f9e"> 32</a></span>  <span class="keywordtype">void</span> <a class="code" href="classCLAM_1_1NormalizationConfig.html#a41eb3b5c4f3b5a670588decf51989f9e" title="The concrete dynamic type constructor calls DefaultInit().">NormalizationConfig::DefaultInit</a>()</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  AddType();</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  AddFrameSize();</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classCLAM_1_1DynamicType.html#a74d1557beda060a62f39b09f0c477fad" title="Method used to resize the data space of the dynamic type, necessary when some AddXXX() / RemoveXXX() ...">UpdateData</a>();</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  SetType(1);</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  SetFrameSize(2205);<span class="comment">//0.05s at 44.1k</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"> 40</span>  }</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> </div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#ac8077177c52282cdf866f55f239d0148"> 43</a></span>  <a class="code" href="classCLAM_1_1Normalization.html#ac8077177c52282cdf866f55f239d0148">Normalization::Normalization</a>()</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  : mIsSilenceCtrl( <span class="stringliteral">"Silence"</span>, this )</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_1Processing.html#a586222b159a5b27b5bbb830a125fccc0" title="Configuration change method.">Configure</a>(<a class="code" href="classCLAM_1_1NormalizationConfig.html" title="Normalization is a CLAM implementation of 3 normalization's algorithms.">NormalizationConfig</a>());</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a7d3d826f22ab41140c8df74ec0ddde41"> 49</a></span>  <a class="code" href="classCLAM_1_1Normalization.html#ac8077177c52282cdf866f55f239d0148">Normalization::Normalization</a>(<a class="code" href="classCLAM_1_1NormalizationConfig.html" title="Normalization is a CLAM implementation of 3 normalization's algorithms.">NormalizationConfig</a>& c)</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  : mIsSilenceCtrl( <span class="stringliteral">"Silence"</span>, this )</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  {</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="classCLAM_1_1Processing.html#a586222b159a5b27b5bbb830a125fccc0" title="Configuration change method.">Configure</a>(c);</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> </div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a57c225f350e9739d254a1a68a17bf53c"> 55</a></span>  <a class="code" href="classCLAM_1_1Normalization.html#a57c225f350e9739d254a1a68a17bf53c">Normalization::~Normalization</a>() {}</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordtype">bool</span> Normalization::ConcreteConfigure(<span class="keyword">const</span> <a class="code" href="classCLAM_1_1ProcessingConfig.html" title="This is an abstract class which serves as interface for configuration classes used as processing obje...">ProcessingConfig</a>& c)</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="classCLAM_1_1Processing.html#afc32b9790688f2875b42e4ab169389c6" title="Helper template to convert a reference to a ProcessingConfig to the concrete ProcessingConfig specifi...">CopyAsConcreteConfig</a>(mConfig,c);</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>  mType=mConfig.GetType();</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  mFrameSize=mConfig.GetFrameSize();</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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> </div>
<div class="line"><a name="l00068"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a9740cdbbb37f9511509f7a21d889b9a4"> 68</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1Normalization.html#a9740cdbbb37f9511509f7a21d889b9a4" title="Supervised mode execution method (using ports)">Normalization::Do</a>(<span class="keywordtype">void</span>) </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> <span class="keyword">false</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>  </div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a8e2bbe455b9d93ed288fe84eb73f38e2"> 73</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1Normalization.html#a9740cdbbb37f9511509f7a21d889b9a4" title="Supervised mode execution method (using ports)">Normalization::Do</a>(<a class="code" href="classCLAM_1_1Audio.html" title="Audio class with the Data Buffer, information about it (SampleRate, BeginTime), and methods to insert...">Audio</a> &in)</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> scaleFactor = 0;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">//Type #1: normalizes according to the max energy </span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">//Type #2: normalizes according to the average energy</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">//Type #3: normalizes according to the threshold under which lies percent% of</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">//the energy values that are not silence</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> ( mType == 1 ) </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#a1418a7e5db61b58d691e3de6384c0d08">ComputeScaleFactorFromMaxEnergy</a>( in.GetBuffer() );</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( mType == 2 )</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#ad4fc7e223c0add53d3c4c2697ac8b703">ComputeScaleFactorFromAvgEnergy</a>( in.GetBuffer() );</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( mType == 3 )</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#a3cbdc7165c30439e60ef141732248afb">ComputeScaleFactorFromDominantEnergy</a>( in.GetBuffer() );</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">const</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> invScaleFactor = 1.0 / scaleFactor;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inBufferSamples = in.GetBuffer();</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> n=0; n<in.<a class="code" href="classCLAM_1_1Audio.html#a2daa98010a19ef4f35a94bc3e0deab5f">GetSize</a>(); n++)</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  inBufferSamples[n]*=invScaleFactor;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</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> </div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a741014d67ab9eb6f864ba324727134cb"> 99</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classCLAM_1_1Normalization.html#a9740cdbbb37f9511509f7a21d889b9a4" title="Supervised mode execution method (using ports)">Normalization::Do</a>(<span class="keyword">const</span> <a class="code" href="classCLAM_1_1Audio.html" title="Audio class with the Data Buffer, information about it (SampleRate, BeginTime), and methods to insert...">Audio</a>& unnorm, <a class="code" href="classCLAM_1_1Audio.html" title="Audio class with the Data Buffer, information about it (SampleRate, BeginTime), and methods to insert...">Audio</a>& norm)</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>  <a class="code" href="Assert_8hxx.html#a0013fa617be6fec21a9ad7180e7d8cff" title="An assertion is a check on an expression that must be true given that all the contracts are fullfille...">CLAM_ASSERT</a>( unnorm.<a class="code" href="classCLAM_1_1Audio.html#a2daa98010a19ef4f35a94bc3e0deab5f">GetSize</a>() == norm.<a class="code" href="classCLAM_1_1Audio.html#a2daa98010a19ef4f35a94bc3e0deab5f">GetSize</a>(),</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="stringliteral">"Normalization::Do() : input and output audio sizes must match"</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>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> scaleFactor = 0;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">//Type #1: normalizes according to the max energy </span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">//Type #2: normalizes according to the average energy</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">//Type #3: normalizes according to the threshold under which lies percent% of</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">//the energy values that are not silence</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">if</span> ( mType == 1 ) </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#a1418a7e5db61b58d691e3de6384c0d08">ComputeScaleFactorFromMaxEnergy</a>( unnorm.GetBuffer() );</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( mType == 2 )</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#ad4fc7e223c0add53d3c4c2697ac8b703">ComputeScaleFactorFromAvgEnergy</a>( unnorm.GetBuffer() );</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( mType == 3 )</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  scaleFactor = <a class="code" href="classCLAM_1_1Normalization.html#a3cbdc7165c30439e60ef141732248afb">ComputeScaleFactorFromDominantEnergy</a>( unnorm.GetBuffer() );</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">const</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> invScaleFactor = 1.0 / scaleFactor;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& outBufferSamples = norm.GetBuffer();</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">const</span> <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inBufferSamples = unnorm.GetBuffer();</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> n=0; n<norm.<a class="code" href="classCLAM_1_1Audio.html#a2daa98010a19ef4f35a94bc3e0deab5f">GetSize</a>(); n++)</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  outBufferSamples[n]=inBufferSamples[n]*invScaleFactor;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a1418a7e5db61b58d691e3de6384c0d08"> 129</a></span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> <a class="code" href="classCLAM_1_1Normalization.html#a1418a7e5db61b58d691e3de6384c0d08">Normalization::ComputeScaleFactorFromMaxEnergy</a>( <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inAudio )</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <a class="code" href="classint.html">TIndex</a> p = 0;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">const</span> <a class="code" href="classint.html">TIndex</a> end = inAudio.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() - mFrameSize;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> chunk;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> maxEnergy = 0.0;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> quantizationThreshold = 0.3 * <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( mFrameSize ) / <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( 4410 );</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">do</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  chunk.<a class="code" href="classCLAM_1_1Array.html#af115ce43636d6404d4ff73aa0c7a2787">SetPtr</a>( inAudio.<a class="code" href="classCLAM_1_1Array.html#ae1b4c2c4399a52dc57bcc854230b328a">GetPtr</a>()+p, mFrameSize );</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">/* unused: TSize size = chunk.GetSize(); */</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> moments(4);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  moments.<a class="code" href="classCLAM_1_1Array.html#a6abe700dc818ed27bf14d9cbf69c5738">SetSize</a>(4);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <a class="code" href="classCLAM_1_1StatsTmpl.html" title="Class to hold basic statistics related to an array of arbitrary data.">Stats</a> myStats(&chunk);</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a493e3d8a780b4d0e1c8ecde1ab393c1e" title="Get all raw moments up to the order indicated.">GetMoments</a>(moments, <a class="code" href="namespaceCLAM.html#a1a8814a65a7f41d44b465e6df3f74906">FifthOrder</a>);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> currentChunkEnergy = myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a7ca338ec3c9119c3e2a3766bd656f4fe" title="Get energy, compute it if necessary.">GetEnergy</a>();</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">//remove silence</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">if</span> ( currentChunkEnergy > quantizationThreshold ) <span class="comment">//seems to be just above noise due to 8 bits quantization</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span>(maxEnergy<currentChunkEnergy) maxEnergy=currentChunkEnergy;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  p += mFrameSize;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  } <span class="keywordflow">while</span> (p <= end );</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">// Enjoy the Silence...</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">if</span> ( maxEnergy <= 1e-7 )</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>( <span class="keyword">true</span> );</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> 1.0;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">return</span> <a class="code" href="CLAM__Math_8hxx.html#ad0ed4530d591ab2cac58c7170af12da8">CLAM_sqrt</a>( maxEnergy / <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>(mFrameSize ) );</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div>
<div class="line"><a name="l00172"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#ad4fc7e223c0add53d3c4c2697ac8b703"> 172</a></span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> <a class="code" href="classCLAM_1_1Normalization.html#ad4fc7e223c0add53d3c4c2697ac8b703">Normalization::ComputeScaleFactorFromAvgEnergy</a>( <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inAudio )</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  {</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> </div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <a class="code" href="classint.html">TIndex</a> p = 0;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">const</span> <a class="code" href="classint.html">TIndex</a> end = inAudio.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() - mFrameSize;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> chunk;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> avgEnergy = 0.0;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">const</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> quantizationThreshold = 0.3 * <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( mFrameSize ) / <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( 4410 );</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">do</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  {</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  chunk.<a class="code" href="classCLAM_1_1Array.html#af115ce43636d6404d4ff73aa0c7a2787">SetPtr</a>( inAudio.<a class="code" href="classCLAM_1_1Array.html#ae1b4c2c4399a52dc57bcc854230b328a">GetPtr</a>()+p, mFrameSize );</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> moments(4);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  moments.<a class="code" href="classCLAM_1_1Array.html#a6abe700dc818ed27bf14d9cbf69c5738">SetSize</a>(4);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="classCLAM_1_1StatsTmpl.html" title="Class to hold basic statistics related to an array of arbitrary data.">Stats</a> myStats(&chunk);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a493e3d8a780b4d0e1c8ecde1ab393c1e" title="Get all raw moments up to the order indicated.">GetMoments</a>(moments, <a class="code" href="namespaceCLAM.html#a1a8814a65a7f41d44b465e6df3f74906">FifthOrder</a>);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> currentChunkEnergy = myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a7ca338ec3c9119c3e2a3766bd656f4fe" title="Get energy, compute it if necessary.">GetEnergy</a>();</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">//remove silence</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">if</span> ( currentChunkEnergy > quantizationThreshold ) <span class="comment">//seems to be just above noise due to 8 bits quantization</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  avgEnergy += currentChunkEnergy;</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  p += mFrameSize;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  </div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  } <span class="keywordflow">while</span> (p <= end );</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  avgEnergy /= <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( inAudio.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() );</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="comment">// Enjoy the Silence...</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> ( avgEnergy <= 1e-7 )</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  {</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>( <span class="keyword">true</span> );</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordflow">return</span> 1.0;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  }</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">return</span> <a class="code" href="CLAM__Math_8hxx.html#ad0ed4530d591ab2cac58c7170af12da8">CLAM_sqrt</a>( avgEnergy );</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div>
<div class="line"><a name="l00216"></a><span class="lineno"><a class="code" href="classCLAM_1_1Normalization.html#a3cbdc7165c30439e60ef141732248afb"> 216</a></span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> <a class="code" href="classCLAM_1_1Normalization.html#a3cbdc7165c30439e60ef141732248afb">Normalization::ComputeScaleFactorFromDominantEnergy</a>( <a class="code" href="classCLAM_1_1Array.html">DataArray</a>& inAudio )</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  {</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <a class="code" href="classint.html">TIndex</a> p = 0;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">const</span> <a class="code" href="classint.html">TIndex</a> end = inAudio.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() - mFrameSize;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> chunk;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> chunksEnergies;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">const</span> <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> quantizationThreshold = 0.3 * <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( mFrameSize ) / <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>( 4410 );</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordflow">do</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  chunk.<a class="code" href="classCLAM_1_1Array.html#af115ce43636d6404d4ff73aa0c7a2787">SetPtr</a>( inAudio.<a class="code" href="classCLAM_1_1Array.html#ae1b4c2c4399a52dc57bcc854230b328a">GetPtr</a>()+p, mFrameSize );</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <a class="code" href="classCLAM_1_1Array.html">DataArray</a> moments(4);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  moments.<a class="code" href="classCLAM_1_1Array.html#a6abe700dc818ed27bf14d9cbf69c5738">SetSize</a>(4);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <a class="code" href="classCLAM_1_1StatsTmpl.html" title="Class to hold basic statistics related to an array of arbitrary data.">Stats</a> myStats(&chunk);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a493e3d8a780b4d0e1c8ecde1ab393c1e" title="Get all raw moments up to the order indicated.">GetMoments</a>(moments, <a class="code" href="namespaceCLAM.html#a1a8814a65a7f41d44b465e6df3f74906">FifthOrder</a>);</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a> currentChunkEnergy = myStats.<a class="code" href="classCLAM_1_1StatsTmpl.html#a7ca338ec3c9119c3e2a3766bd656f4fe" title="Get energy, compute it if necessary.">GetEnergy</a>();</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">//remove silence</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">if</span> ( currentChunkEnergy > quantizationThreshold ) <span class="comment">//seems to be just above noise due to 8 bits quantization</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#acea72efe2bf606ae940d50a284a8e5ad">AddElem</a>( currentChunkEnergy );</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  }</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  p += mFrameSize; </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  } <span class="keywordflow">while</span> (p <= end );</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">// Enjoy the silence...</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordflow">if</span> ( chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() == 0 )</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>( <span class="keyword">true</span> );</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">return</span> 1.0;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  }</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  std::sort( chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#ae1b4c2c4399a52dc57bcc854230b328a">GetPtr</a>(), chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#ae1b4c2c4399a52dc57bcc854230b328a">GetPtr</a>()+chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>() );</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">//find the threshold under which lies percent% of the energy values</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="comment">//that are not silence</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordtype">int</span> percentage = 90;</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordtype">int</span> i = ( chunksEnergies.<a class="code" href="classCLAM_1_1Array.html#a4679b3a2a2921d6bf15d63c8312fdfc3">Size</a>()*percentage ) / 100;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  i = ( i == 0 ) ? i : i - 1;</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> <a class="code" href="CLAM__Math_8hxx.html#ad0ed4530d591ab2cac58c7170af12da8">CLAM_sqrt</a>( chunksEnergies[i]/<a class="code" href="namespaceCLAM.html#ab9c6321b061069797fcc173f61e8111a">TData</a>(mFrameSize) );</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  }</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  </div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordtype">void</span> Normalization::CheckSilence( <span class="keywordtype">int</span> size )</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  {</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">if</span> (size==0) </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>(<span class="keyword">true</span>);</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  mIsSilenceCtrl.<a class="code" href="classCLAM_1_1OutControl.html#a1c83a6d750f7b4abc4e0e030b59f83d7">SendControl</a>(<span class="keyword">false</span>);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div>
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