FFTransform.h

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//-----------------------------------------------------------------------------
//
//  $Id: FFTransform.h 874 2014-09-08 02:21:29Z weegreenblobbie $
//
//  Nsound is a C++ library and Python module for audio synthesis featuring
//  dynamic digital filters. Nsound lets you easily shape waveforms and write
//  to disk or plot them. Nsound aims to be as powerful as Csound but easy to
//  use.
//
//  Copyright (c) 2007-Present Nick Hilton
//
//  weegreenblobbie_yahoo_com (replace '_' with '@' and '.')
//
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
//
//  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 Library 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 _NSOUND_FFTRANSFORM_H_
#define _NSOUND_FFTRANSFORM_H_

#include <Nsound/Nsound.h>
#include <Nsound/FFTChunk.h>
#include <Nsound/WindowType.h>

namespace Nsound
{

class Buffer;
class FFTChunk;

//-----------------------------------------------------------------------------
//
//
class FFTransform
{
    public:

    FFTransform(const float64 & sample_rate);


    ~FFTransform(){};

    //
    Buffer
    fft(const Buffer & time_domain) const;

    //
    FFTChunkVector
    fft(const Buffer & input, int32 n_order, int32 n_overlap = 0) const;

    //
    Buffer
    ifft(const FFTChunkVector & input) const;

    //
    Buffer
    ifft(const Buffer & frequency_domain) const;

    static
    int32
    roundUp2(int32 raw);

    void
    setWindow(WindowType type);

    protected:

    uint32 sample_rate_;

    private:

    void
    fft(Buffer & real, Buffer & img, int32 n_order) const;

    WindowType type_;

}; // class BufferChunk

} // namespace Nsound

#endif

// :mode=c++: jEdit modeline