view data/fileio/FFTFuzzyAdapter.h @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- 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_FUZZY_ADAPTER_H_
#define _FFT_FUZZY_ADAPTER_H_

#include "FFTDataServer.h"

class FFTFuzzyAdapter
{
public:
    FFTFuzzyAdapter(const DenseTimeValueModel *model,
                    int channel,
                    WindowType windowType,
                    int windowSize,
                    int windowIncrement,
                    int fftSize,
                    bool polar,
                    int fillFromColumn = 0);
    ~FFTFuzzyAdapter();

    int getWidth() const {
        return m_server->getWidth() >> m_xshift;
    }
    int getHeight() const {
        return m_server->getHeight() >> m_yshift;
    }
    float getMagnitudeAt(int x, int y) {
        return m_server->getMagnitudeAt(x << m_xshift, y << m_yshift);
    }
    float getNormalizedMagnitudeAt(int x, int y) {
        return m_server->getNormalizedMagnitudeAt(x << m_xshift, y << m_yshift);
    }
    float getMaximumMagnitudeAt(int x) {
        return m_server->getMaximumMagnitudeAt(x << m_xshift);
    }
    float getPhaseAt(int x, int y) {
        return m_server->getPhaseAt(x << m_xshift, y << m_yshift);
    }
    void getValuesAt(int x, int y, float &real, float &imaginary) {
        m_server->getValuesAt(x << m_xshift, y << m_yshift, real, imaginary);
    }
    bool isColumnReady(int x) {
        return m_server->isColumnReady(x << m_xshift);
    }
    bool isLocalPeak(int x, int y) {
        float mag = getMagnitudeAt(x, y);
        if (y > 0 && mag < getMagnitudeAt(x, y - 1)) return false;
        if (y < getHeight() - 1 && mag < getMagnitudeAt(x, y + 1)) return false;
        return true;
    }
    bool isOverThreshold(int x, int y, float threshold) {
        return getMagnitudeAt(x, y) > threshold;
    }

    int getFillCompletion() const { return m_server->getFillCompletion(); }
    int getFillExtent() const { return m_server->getFillExtent(); }

private:
    FFTFuzzyAdapter(const FFTFuzzyAdapter &); // not implemented
    FFTFuzzyAdapter &operator=(const FFTFuzzyAdapter &); // not implemented

    FFTDataServer *m_server;
    int m_xshift;
    int m_yshift;
};

#endif