Mercurial > hg > svcore
view base/RangeMapper.h @ 264:260032c26c4f
* don't store fft values scaled by fftsize/2; that's a special requirement
for the spectrogram, and other applications will not expect it -- make the
spectrogram do that scaling itself
* add a higher-resolution memory cache (still polar, though) as an alternative
to the 16-bit compact cache
* don't use the memory cache if we want rectangular coords (unless the disc
cache is totally infeasible) as conversion slows it down anyway
* avoid redundant rectangular -> polar -> rectangular conversion when storing
values in a rectangular-mode disc cache
author | Chris Cannam |
---|---|
date | Fri, 01 Jun 2007 13:56:35 +0000 |
parents | 91fdc752e540 |
children | ca3b91119482 |
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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 QMUL. 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 _RANGE_MAPPER_H_ #define _RANGE_MAPPER_H_ #include <QString> class RangeMapper { public: virtual ~RangeMapper() { } virtual int getPositionForValue(float value) const = 0; virtual float getValueForPosition(int position) const = 0; virtual QString getUnit() const { return ""; } }; class LinearRangeMapper : public RangeMapper { public: LinearRangeMapper(int minpos, int maxpos, float minval, float maxval, QString unit = ""); virtual int getPositionForValue(float value) const; virtual float getValueForPosition(int position) const; virtual QString getUnit() const { return m_unit; } protected: int m_minpos; int m_maxpos; float m_minval; float m_maxval; QString m_unit; }; class LogRangeMapper : public RangeMapper { public: LogRangeMapper(int minpos, int maxpos, float ratio, float minlog, QString m_unit = ""); virtual int getPositionForValue(float value) const; virtual float getValueForPosition(int position) const; virtual QString getUnit() const { return m_unit; } protected: int m_minpos; int m_maxpos; float m_ratio; float m_minlog; float m_maxlog; QString m_unit; }; #endif