Mercurial > hg > svcore
view data/model/Dense3DModelPeakCache.h @ 1401:cc62d7862203
Some bits and bobs to do with handling memory pressure
author | Chris Cannam |
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date | Mon, 06 Mar 2017 17:23:46 +0000 |
parents | df59bf0b4236 |
children | c01cbe41aeb5 |
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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" class Dense3DModelPeakCache : public DenseThreeDimensionalModel { Q_OBJECT public: Dense3DModelPeakCache(const DenseThreeDimensionalModel *source, int columnsPerPeak); ~Dense3DModelPeakCache(); virtual bool isOK() const { return m_source && m_source->isOK(); } virtual sv_samplerate_t getSampleRate() const { return m_source->getSampleRate(); } virtual sv_frame_t getStartFrame() const { return m_source->getStartFrame(); } virtual sv_frame_t getEndFrame() const { return m_source->getEndFrame(); } virtual int getResolution() const { return m_source->getResolution() * m_columnsPerPeak; } virtual int getColumnsPerPeak() const { return m_columnsPerPeak; } virtual int getWidth() const { int sourceWidth = m_source->getWidth(); if ((sourceWidth % m_columnsPerPeak) == 0) { return sourceWidth / m_columnsPerPeak; } else { return sourceWidth / m_columnsPerPeak + 1; } } virtual int getHeight() const { return m_source->getHeight(); } virtual float getMinimumLevel() const { return m_source->getMinimumLevel(); } virtual float getMaximumLevel() const { return m_source->getMaximumLevel(); } /** * 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. */ virtual Column getColumn(int col) const; virtual float getValueAt(int col, int n) const; virtual QString getBinName(int n) const { return m_source->getBinName(n); } virtual bool shouldUseLogValueScale() const { return m_source->shouldUseLogValueScale(); } QString getTypeName() const { return tr("Dense 3-D Peak Cache"); } virtual int getCompletion() const { return m_source->getCompletion(); } protected slots: void sourceModelChanged(); void sourceModelAboutToBeDeleted(); private: const DenseThreeDimensionalModel *m_source; mutable EditableDenseThreeDimensionalModel *m_cache; mutable std::vector<bool> m_coverage; // must be bool, for space efficiency // (vector of bool uses 1-bit elements) int m_columnsPerPeak; bool haveColumn(int column) const; void fillColumn(int column) const; }; #endif