view data/model/PowerOfSqrtTwoZoomConstraint.h @ 266:2268963dabd1

* FFT: fix invalid write of normalisation factor in compact mode of disc cache * FFT: fix range problem for normalisation factor in compact mode (it was stored as an unsigned scaled from an assumed float range of 0->1, which is not very plausible and not accurate enough even if true -- use a float instead) * Spectrogram: fix vertical zoom behaviour for log frequency spectrograms: make the thing in the middle of the display remain in the middle after zoom * Overview widget: don't update the detailed waveform if still decoding the audio file (too expensive to do all those redraws)
author Chris Cannam
date Fri, 08 Jun 2007 15:19:50 +0000
parents 0ed2b2e26b44
children 59e7fe1b1003
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/* -*- 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 _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_
#define _POWER_OF_SQRT_TWO_ZOOM_CONSTRAINT_H_

#include "base/ZoomConstraint.h"

class PowerOfSqrtTwoZoomConstraint : virtual public ZoomConstraint
{
public:
    virtual size_t getNearestBlockSize(size_t requestedBlockSize,
				       RoundingDirection dir = RoundNearest)
	const;
    
    virtual size_t getNearestBlockSize(size_t requestedBlockSize,
				       int &type,
				       int &power,
				       RoundingDirection dir = RoundNearest)
	const;
	
    virtual size_t getMinCachePower() const { return 6; }
};

#endif