view data/fft/FFTCache.h @ 316:3a6725f285d6

* Make RemoteFile far more pervasive, and use it for local files as well
  so that we can handle both transparently.  Make it shallow copy with
  reference counting, so it can be used by value without having to worry
  about the cache file lifetime.  Use RemoteFile for MainWindow file-open
  functions, etc

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _FFT_CACHE_H_
#define _FFT_CACHE_H_

#include <cstdlib>
#include <cmath>

#include <stdint.h>

class FFTCache
{
public:
    virtual ~FFTCache() { }

    virtual size_t getWidth() const = 0;
    virtual size_t getHeight() const = 0;
	
    virtual void resize(size_t width, size_t height) = 0;
    virtual void reset() = 0; // zero-fill or 1-fill as appropriate without changing size
	
    virtual float getMagnitudeAt(size_t x, size_t y) const = 0;
    virtual float getNormalizedMagnitudeAt(size_t x, size_t y) const = 0;
    virtual float getMaximumMagnitudeAt(size_t x) const = 0;
    virtual float getPhaseAt(size_t x, size_t y) const = 0;

    virtual void getValuesAt(size_t x, size_t y, float &real, float &imaginary) const = 0;

    virtual bool haveSetColumnAt(size_t x) const = 0;

    // may modify argument arrays
    virtual void setColumnAt(size_t x, float *mags, float *phases, float factor) = 0;

    // may modify argument arrays
    virtual void setColumnAt(size_t x, float *reals, float *imags) = 0;

    virtual void suspend() { }

protected:
    FFTCache() { }
};


#endif