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/*
* 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 _StatisticalProperties_
#define _StatisticalProperties_
#include <CLAM/Processing.hxx>
#include <CLAM/AudioInPort.hxx>
#include <CLAM/OutControl.hxx>
#include <CLAM/CLAM_Math.hxx>
namespace CLAM {
/** \brief Statistical properties
*
* Mean, Standard deviation, min, max, etc.
*/
class StatisticalProperties: public Processing
{
/** This method returns the name of the object
* @return Char pointer with the name of object
*/
const char *GetClassName() const { return "StatisticalProperties"; }
/** Ports **/
AudioInPort mInput;
/** Controls **/
FloatOutControl mMean;
FloatOutControl mStd;
FloatOutControl mMin;
FloatOutControl mMax;
/** Internal values **/
TData _lastMean;
TData _lastStd;
TData _min;
TData _max;
public:
StatisticalProperties(const Config & config=Config())
:
mInput("Input", this),
mMean("Mean", this),
mStd("Standard deviation (std)", this),
mMin("Min", this),
mMax("Max", this)
{
Configure( config );
_lastMean = 0.;
_lastStd = 0.;
_min = 0.;
_max = 0.;
}
~StatisticalProperties() {}
bool Do()
{
bool result = Do( mInput.GetAudio() );
mInput.Consume();
return result;
}
bool Do(const Audio& in)
{
int size = in.GetSize();
const DataArray& inb = in.GetBuffer();
TData mean=0.;
for (int i=0;i<size;i++)
{
mean += inb[i];
if (inb[i]>_max)
_max = inb[i];
else
if (inb[i]<_min) _min = inb[i];
}
_lastMean = (mean/TData(size) + _lastMean)/2.; //average with previous mean, soft change
mMean.SendControl( _lastMean );
mMin.SendControl( _min );
mMax.SendControl( _max );
TData std=0.;
for (int i=0;i<size;i++)
{
std += CLAM_pow(inb[i]-_lastMean,2);
}
_lastStd = (CLAM_sqrt( std/TData(size) ) + _lastStd)/2.; //average with previous std, soft change
mStd.SendControl( _lastStd );
return true;
}
};
};//namespace CLAM
#endif // _StatisticalProperties_
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