MelFilterBank.hxx

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/*
 * Copyright (c) 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 __MELFILTERBANK__
#define __MELFILTERBANK__

#include "Processing.hxx"
#include "Spectrum.hxx"
#include "MelSpectrum.hxx"
#include "Array.hxx"
#include "InPort.hxx"
#include "OutPort.hxx"

namespace CLAM
{
        
        class MelFilterBankConfig : public ProcessingConfig
        {
        public:
                DYNAMIC_TYPE_USING_INTERFACE( MelFilterBankConfig, 6, ProcessingConfig );
                DYN_ATTRIBUTE( 0, public, TSize,       SpectrumSize );
                DYN_ATTRIBUTE( 1, public, TData,       SpectralRange );
                DYN_ATTRIBUTE( 2, public, TData,       LowCutoff );
                DYN_ATTRIBUTE( 3, public, TData,       HighCutoff );
                DYN_ATTRIBUTE( 4, public, TSize,       NumBands );
                DYN_ATTRIBUTE( 5, public, bool,        UsePower );

        protected:
                void DefaultInit();
        };

        class MelFilterBank : public Processing
        {
        public:
                MelFilterBank();

                MelFilterBank( const MelFilterBankConfig& );

                ~MelFilterBank();

                bool Do();

                bool Do(const Spectrum& s, MelSpectrum& ms );

                const ProcessingConfig& GetConfig() const
                {
                        return mConfig;
                }

                virtual const char* GetClassName() const
                {
                        return "MelFilterBank";
                }

        protected:

                virtual bool ConcreteConfigure( const ProcessingConfig& cfg );

        protected:

                TData Mel( TData linFreq );

                void InitializeTables();

        private:

                MelFilterBankConfig mConfig;
                Array<TIndex>       mMelBand;
                DataArray           mFilterWeights;
                TIndex              mLowIdx;
                TIndex              mHighIdx;
                InPort<Spectrum> mIn;
                OutPort<MelSpectrum> mOut;
        };
}


#endif // MelFilterBank.hxx