view data/model/DenseThreeDimensionalModel.h @ 197:11cacfe5d127

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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 _DENSE_THREE_DIMENSIONAL_MODEL_H_
#define _DENSE_THREE_DIMENSIONAL_MODEL_H_

#include "Model.h"
#include "base/ZoomConstraint.h"

#include <QMutex>
#include <vector>

class DenseThreeDimensionalModel : public Model
{
    Q_OBJECT

public:
    /**
     * Return the number of sample frames covered by each column of bins.
     */
    virtual size_t getResolution() const = 0;

    /**
     * Return the number of columns of bins in the model.
     */
    virtual size_t getWidth() const = 0;

    /**
     * Return the number of bins in each column.
     */
    virtual size_t getHeight() const = 0; 

    /**
     * Return the minimum permissible value in each bin.
     */
    virtual float getMinimumLevel() const = 0;

    /**
     * Return the maximum permissible value in each bin.
     */
    virtual float getMaximumLevel() const = 0;

    /**
     * Return true if there are data available for the given column.
     * This should return true only if getBinValues(windowStartFrame)
     * would not have to do any substantial work to calculate its
     * return values.  If this function returns false, it may still be
     * possible to get the bin values for that column, but they may
     * have to be calculated.
     */
    virtual bool isColumnAvailable(size_t column) const = 0;

    typedef std::vector<float> Column;

    /**
     * Get data from the given column of bin values.
     */
    virtual void getColumn(size_t column, Column &result) const = 0;

    /**
     * Get the single data point from the n'th bin of the given column.
     */
    virtual float getValueAt(size_t column, size_t n) const = 0;

    /**
     * Get the name of a given bin (i.e. a label to associate with
     * that bin across all columns).
     */
    virtual QString getBinName(size_t n) const = 0;

    /**
     * Utility function to query whether a given bin is greater than
     * its (vertical) neighbours.
     */
    bool isLocalPeak(size_t x, size_t y) {
        float value = getValueAt(x, y);
        if (y > 0 && value < getValueAt(x, y - 1)) return false;
        if (y < getHeight() - 1 && value < getValueAt(x, y + 1)) return false;
        return true;
    }

    /**
     * Utility function to query whether a given bin is greater than a
     * certain threshold.
     */
    bool isOverThreshold(size_t x, size_t y, float threshold) {
        return getValueAt(x, y) > threshold;
    }

    virtual int getCompletion() const = 0;

protected:
    DenseThreeDimensionalModel() { }
};

#endif