Chris@152: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@152: 
Chris@152: /*
Chris@152:     Sonic Visualiser
Chris@152:     An audio file viewer and annotation editor.
Chris@152:     Centre for Digital Music, Queen Mary, University of London.
Chris@152:     This file copyright 2006 Chris Cannam.
Chris@152:     
Chris@152:     This program is free software; you can redistribute it and/or
Chris@152:     modify it under the terms of the GNU General Public License as
Chris@152:     published by the Free Software Foundation; either version 2 of the
Chris@152:     License, or (at your option) any later version.  See the file
Chris@152:     COPYING included with this distribution for more information.
Chris@152: */
Chris@152: 
Chris@152: #ifndef _FFT_CACHE_H_
Chris@152: #define _FFT_CACHE_H_
Chris@152: 
Chris@152: #include <cstdlib>
Chris@152: #include <cmath>
Chris@152: 
Chris@152: #include <stdint.h>
Chris@152: 
Chris@152: class FFTCache
Chris@152: {
Chris@152: public:
Chris@152:     virtual ~FFTCache() { }
Chris@152: 
Chris@152:     virtual size_t getWidth() const = 0;
Chris@152:     virtual size_t getHeight() const = 0;
Chris@152: 	
Chris@152:     virtual void resize(size_t width, size_t height) = 0;
Chris@152:     virtual void reset() = 0; // zero-fill or 1-fill as appropriate without changing size
Chris@152: 	
Chris@152:     virtual float getMagnitudeAt(size_t x, size_t y) const = 0;
Chris@152:     virtual float getNormalizedMagnitudeAt(size_t x, size_t y) const = 0;
Chris@152:     virtual float getMaximumMagnitudeAt(size_t x) const = 0;
Chris@152:     virtual float getPhaseAt(size_t x, size_t y) const = 0;
Chris@152: 
Chris@152:     virtual void getValuesAt(size_t x, size_t y, float &real, float &imaginary) const = 0;
Chris@509:     virtual void getMagnitudesAt(size_t x, float *values, size_t minbin, size_t count, size_t step) const = 0;
Chris@152: 
Chris@152:     virtual bool haveSetColumnAt(size_t x) const = 0;
Chris@152: 
Chris@152:     // may modify argument arrays
Chris@152:     virtual void setColumnAt(size_t x, float *mags, float *phases, float factor) = 0;
Chris@152: 
Chris@152:     // may modify argument arrays
Chris@152:     virtual void setColumnAt(size_t x, float *reals, float *imags) = 0;
Chris@152: 
Chris@152:     virtual void suspend() { }
Chris@152: 
Chris@408:     enum StorageType {
Chris@408:         Compact, // 16 bits normalized polar
Chris@408:         Rectangular, // floating point real+imag
Chris@408:         Polar // floating point mag+phase
Chris@408:     };
Chris@408:     virtual StorageType getStorageType() = 0;
Chris@408: 
Chris@359:     enum Type { MemoryCache, FileCache };
Chris@359:     virtual Type getType() = 0;
Chris@359: 
Chris@152: protected:
Chris@152:     FFTCache() { }
Chris@152: };
Chris@152: 
Chris@152: 
Chris@152: #endif