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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 2009 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 DENSE_3D_MODEL_PEAK_CACHE_H
#define DENSE_3D_MODEL_PEAK_CACHE_H
#include "DenseThreeDimensionalModel.h"
#include "EditableDenseThreeDimensionalModel.h"
namespace sv {
/**
* A DenseThreeDimensionalModel that represents a reduction in the
* time dimension of another DenseThreeDimensionalModel. Each column
* contains the peak values from a number of consecutive columns in
* the source. Each column is populated from the source model when
* first requested, and is returned from cache on subsequent requests.
*
* Dense3DModelPeakCache is not thread-safe, even if the underlying
* model is. Classes making use of it should serialise or have one per
* thread.
*/
class Dense3DModelPeakCache : public DenseThreeDimensionalModel
{
Q_OBJECT
public:
Dense3DModelPeakCache(ModelId source, // a DenseThreeDimensionalModel
int columnsPerPeak);
~Dense3DModelPeakCache();
bool isOK() const override {
auto source = ModelById::get(m_source);
return source && source->isOK();
}
sv_samplerate_t getSampleRate() const override {
auto source = ModelById::get(m_source);
return source ? source->getSampleRate() : 0;
}
sv_frame_t getStartFrame() const override {
auto source = ModelById::get(m_source);
return source ? source->getStartFrame() : 0;
}
sv_frame_t getTrueEndFrame() const override {
auto source = ModelById::get(m_source);
return source ? source->getTrueEndFrame() : 0;
}
int getResolution() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->getResolution() * m_columnsPerPeak : 1;
}
virtual int getColumnsPerPeak() const {
return m_columnsPerPeak;
}
int getWidth() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
if (!source) return 0;
int sourceWidth = source->getWidth();
if ((sourceWidth % m_columnsPerPeak) == 0) {
return sourceWidth / m_columnsPerPeak;
} else {
return sourceWidth / m_columnsPerPeak + 1;
}
}
int getHeight() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->getHeight() : 0;
}
float getMinimumLevel() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->getMinimumLevel() : 0.f;
}
float getMaximumLevel() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->getMaximumLevel() : 1.f;
}
/**
* Retrieve the peaks column at peak-cache column number col. This
* will consist of the peak values in the underlying model from
* columns (col * getColumnsPerPeak()) to ((col+1) *
* getColumnsPerPeak() - 1) inclusive.
*/
Column getColumn(int col) const override;
/**
* Retrieve the peaks column at peak-cache column number col,
* returning only nbins bins starting at bin minbin. No range
* checking is performed, so minbin and nbins must be in range for
* our height.
*/
Column getColumn(int col, int minbin, int nbins) const override;
float getValueAt(int col, int n) const override;
QString getValueUnit() const override;
QString getBinName(int n) const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->getBinName(n) : "";
}
bool shouldUseLogValueScale() const override {
auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
return source ? source->shouldUseLogValueScale() : false;
}
QString getTypeName() const override { return tr("Dense 3-D Peak Cache"); }
int getCompletion() const override {
auto source = ModelById::get(m_source);
return source ? source->getCompletion() : 100;
}
QVector<QString>
getStringExportHeaders(DataExportOptions) const override {
return {};
}
QVector<QVector<QString>>
toStringExportRows(DataExportOptions, sv_frame_t, sv_frame_t) const override {
return {};
}
protected slots:
void sourceModelChanged(ModelId);
private:
const ModelId m_source;
const int m_columnsPerPeak;
mutable std::vector<Column> m_cache;
mutable std::vector<bool> m_coverage; // bool for space efficiency
// (vector of bool is a bitmap)
mutable bool m_finalColumnIncomplete;
bool haveColumn(int column) const;
void fillColumn(int column) const;
};
} // end namespace sv
#endif
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