/usr/include/CLAM/3BandCompressor.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.
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* 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 _ThreeBandCompressor_
#define _ThreeBandCompressor_
#include "InPort.hxx"
#include "OutPort.hxx"
#include "InControl.hxx"
#include "Frame.hxx"
#include "FrameTransformation.hxx"
#include "FrameTransformationConfig.hxx"
namespace CLAM{
/**
Limits the spectrum magnitude to different threshold for each of three bands.
Notice that despite the name, this is a Limiter not a Compressor.
Cutoff frequencies are normalized in the interval 0,1 which maps
into the full spectral range of the input spectrum.
@param[in] "In Spectrum" [Port] Input spectrum
@param[out] "Out Spectrum" [Port] Output spectrum
@param[in] LowCutoff [Control] Normalized frequency that separes the first and second bands. [0..1]
@param[in] HighCutoff [Control] Normalized frequency that separes the second and third bands. [0..1]
@param[in] LowThreshold [Control] Threshold in dB's for the first band.
@param[in] MidThreshold [Control] Threshold in dB's for the second band.
@param[in] HighThreshold [Control] Threshold in dB's for the third band.
@ingroup SpectralTransformations
*/
class ThreeBandCompressor: public FrameTransformationTmpl<Spectrum>
{
InPort<Spectrum> mIn;
OutPort<Spectrum> mOut;
FloatInControl mLowCutoffFreqCtl;
FloatInControl mHighCutoffFreqCtl;
FloatInControl mLowThresholdCtl;
FloatInControl mMidThresholdCtl;
FloatInControl mHighThresholdCtl;
public:
const char* GetClassName() const
{
return "ThreeBandCompressor";
}
ThreeBandCompressor()
: mIn("In Spectrum", this)
, mOut("Out Spectrum", this)
, mLowCutoffFreqCtl("LowCutoff", this)
, mHighCutoffFreqCtl("HighCutoff", this)
, mLowThresholdCtl("LowThreshold", this)
, mMidThresholdCtl("MidThreshold", this)
, mHighThresholdCtl("HighThreshold", this)
{
Configure( FrameTransformationConfig() );
mLowCutoffFreqCtl.SetBounds(0.,1.);
mHighCutoffFreqCtl.SetBounds(0.,1.);
}
~ThreeBandCompressor() {}
virtual bool InitControls()
{
mLowCutoffFreqCtl.DoControl(1000);
mHighCutoffFreqCtl.DoControl(5000);
mLowThresholdCtl.DoControl(0);
mMidThresholdCtl.DoControl(0);
mHighThresholdCtl.DoControl(0);
return true;
}
bool Do(const Frame& in, Frame& out)
{
return Do(in.GetSpectrum(), out.GetSpectrum());
}
bool Do(const Spectrum& in, Spectrum& out);
bool Do()
{
bool result = Do(mIn.GetData(), mOut.GetData());
mIn.Consume();
mOut.Produce();
return result;
}
};
}//namespace CLAM
#endif // _ThreeBandCompressor_
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