/usr/include/CLAM/Normalization.hxx is in libclam-dev 1.4.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /*
* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _Normalization_
#define _Normalization_
#include "Processing.hxx"
#include "Audio.hxx"
#include "OutControl.hxx"
namespace CLAM
{
/**
Normalization is a CLAM implementation of 3 normalization's algorithms.
-# normalizes in relation to the maximum energy value of the signal
-# normalizes in relation to the average energy of the signal
-# scales the audio by the value under which lies 90% of the energy values that are not "silence"
The class's Do() function input is CLAM Audio, the ouput is the normalized Audio.
The class's configuration parameters are:
<table>
<tr>
<th>parameters</th>
<th>default value)</th>
<th>Comment</th>
</tr>
<tr>
<th>FrameSize</th>
<td>2205 - 0.05s @ 44.1 kHz</td>
<td>Frame Size over which normalization takes place</td>
</tr>
<tr>
<th>Type</th>
<td>(1)</td>
<td>Type of normalization to be applied. 1, 2 or 3 according to
the normalizations descriptions above.</td>
</tr>
@author jricard@iua.upf.es
@author gpeter@iua.upf.es
*/
class NormalizationConfig: public ProcessingConfig
{
public:
DYNAMIC_TYPE_USING_INTERFACE (NormalizationConfig, 2, ProcessingConfig);
DYN_ATTRIBUTE (0, public, int, Type);
DYN_ATTRIBUTE (1, public, TSize, FrameSize);
void DefaultInit(void);
};
class Normalization: public Processing
{
private:
NormalizationConfig mConfig;
/**
* This control will send a signal for each Do execution, telling if the passed audio is silence (0) or not (1)
* */
FloatOutControl mIsSilenceCtrl;
int mType;
TSize mFrameSize;
bool ConcreteConfigure(const ProcessingConfig& c);
/*
* With this check an app can know if the passed audio is silence,
* just consulting the value of the control.
*/
void CheckSilence( int size );
public:
Normalization();
Normalization(NormalizationConfig& c);
~Normalization();
const char * GetClassName() const {return "Normalization";}
bool Do(void);
bool Do(Audio &in);
bool Do( const Audio& unnorm, Audio& norm );
const ProcessingConfig &GetConfig() const { return mConfig;}
protected:
TData ComputeScaleFactorFromMaxEnergy( DataArray& inAudio );
TData ComputeScaleFactorFromAvgEnergy( DataArray& inAudio );
TData ComputeScaleFactorFromDominantEnergy( DataArray& inAudio );
};
}
#endif
|