comparison base/FFTFileCache.h @ 88:024d4a71f5bf

* Just skeleton bits of file-based FFT cache

+/* -*- 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_FILE_CACHE_H_
+#define _FFT_FILE_CACHE_H_
+
+#include "FFTCache.h"
+
+class MatrixFileCache;
+
+class FFTFileCache : public FFTCacheBase
+{
+public:
+    //!!!
+    // Initially, make this take a string for the filename,
+    // and make the spectrogram layer have two, one for the main
+    // thread and one for the fill thread, one RO and one RW, both
+    // using the same string based off spectrogram layer address
+    // or export ID.
+    // Subsequently factor out into reader and writer classes?
+    // Make take arguments to ctor describing FFT parameters and
+    // calculate its own string and eventually do its own FFT as
+    // well.  Intention is to make it able ultimately to write
+    // its own cache so it can do it in the background while e.g.
+    // plugins read from it -- need the reader thread to be able
+    // to block waiting for the writer thread as appropriate.
+
+    FFTFileCache();
+    virtual ~FFTFileCache();
+
+    virtual size_t getWidth() const;
+    virtual size_t getHeight() const;
+	
+    virtual void resize(size_t width, size_t height);
+    virtual void reset(); // zero-fill or 1-fill as appropriate without changing size
+	
+    virtual float getMagnitudeAt(size_t x, size_t y) const;
+    virtual float getNormalizedMagnitudeAt(size_t x, size_t y) const;
+    virtual float getPhaseAt(size_t x, size_t y) const;
+
+    virtual bool isLocalPeak(size_t x, size_t y) const;
+    virtual bool isOverThreshold(size_t x, size_t y, float threshold) const;
+
+    virtual void setNormalizationFactor(size_t x, float factor);
+    virtual void setMagnitudeAt(size_t x, size_t y, float mag);
+    virtual void setNormalizedMagnitudeAt(size_t x, size_t y, float norm);
+    virtual void setPhaseAt(size_t x, size_t y, float phase);
+
+    virtual QColor getColour(unsigned char index) const;
+    virtual void setColour(unsigned char index, QColor colour);
+
+protected:
+    size_t m_height;
+    MatrixFileCache *m_mfc;
+};
+
+#endif