comparison audioio/PlaySpeedRangeMapper.h @ 59:1016a8ceceda

* Introduce PlaySpeedRangeMapper for playback speed dial

+/* -*- 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 _PLAY_SPEED_RANGE_MAPPER_H_
+#define _PLAY_SPEED_RANGE_MAPPER_H_
+
+#include "base/RangeMapper.h"
+
+class PlaySpeedRangeMapper : public RangeMapper
+{
+public:
+    PlaySpeedRangeMapper(int minpos, int maxpos);
+
+    virtual int getPositionForValue(float value) const;
+    virtual float getValueForPosition(int position) const;
+
+    float getFactorForPosition(int position) const;
+    float getFactorForValue(float value) const;
+
+    virtual QString getUnit() const;
+    
+protected:
+    int m_minpos;
+    int m_maxpos;
+};
+
+
+#endif