Mercurial > hg > svcore
view data/model/Dense3DModelPeakCache.cpp @ 875:3e6ed8a8577b tonioni
Use a sparse time-value model only for outputs with fixed bin count of 1, not for those with unknown bin count.
(Precursor to using more than one model for outputs with unknown bin count)
author | Chris Cannam |
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date | Tue, 28 Jan 2014 18:52:22 +0000 |
parents | bbe503e368a9 |
children | 59e7fe1b1003 |
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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. */ #include "Dense3DModelPeakCache.h" #include "base/Profiler.h" Dense3DModelPeakCache::Dense3DModelPeakCache(DenseThreeDimensionalModel *source, size_t columnsPerPeak) : m_source(source), m_resolution(columnsPerPeak) { m_coverage.resize(1); // otherwise it is simply invalid m_cache = new EditableDenseThreeDimensionalModel (source->getSampleRate(), getResolution(), source->getHeight(), EditableDenseThreeDimensionalModel::NoCompression, false); connect(source, SIGNAL(modelChanged()), this, SLOT(sourceModelChanged())); connect(source, SIGNAL(aboutToBeDeleted()), this, SLOT(sourceModelAboutToBeDeleted())); } Dense3DModelPeakCache::~Dense3DModelPeakCache() { delete m_cache; } bool Dense3DModelPeakCache::isColumnAvailable(size_t column) const { if (!m_source) return false; if (haveColumn(column)) return true; for (int i = m_resolution; i > 0; ) { --i; if (!m_source->isColumnAvailable(column * m_resolution + i)) { return false; } } return true; } Dense3DModelPeakCache::Column Dense3DModelPeakCache::getColumn(size_t column) const { Profiler profiler("Dense3DModelPeakCache::getColumn"); if (!m_source) return Column(); if (!haveColumn(column)) fillColumn(column); return m_cache->getColumn(column); } float Dense3DModelPeakCache::getValueAt(size_t column, size_t n) const { if (!m_source) return 0.f; if (!haveColumn(column)) fillColumn(column); return m_cache->getValueAt(column, n); } void Dense3DModelPeakCache::sourceModelChanged() { if (!m_source) return; if (m_coverage.size() > 0) { // The last peak may have come from an incomplete read, which // may since have been filled, so reset it m_coverage.reset(m_coverage.size()-1); } m_coverage.resize(getWidth()); // retaining data } void Dense3DModelPeakCache::sourceModelAboutToBeDeleted() { m_source = 0; } bool Dense3DModelPeakCache::haveColumn(size_t column) const { return column < m_coverage.size() && m_coverage.get(column); } void Dense3DModelPeakCache::fillColumn(size_t column) const { Profiler profiler("Dense3DModelPeakCache::fillColumn"); if (column >= m_coverage.size()) { // see note in sourceModelChanged if (m_coverage.size() > 0) m_coverage.reset(m_coverage.size()-1); m_coverage.resize(column + 1); } Column peak; for (int i = 0; i < m_resolution; ++i) { Column here = m_source->getColumn(column * m_resolution + i); if (i == 0) { peak = here; } else { for (int j = 0; j < peak.size() && j < here.size(); ++j) { if (here[j] > peak[j]) peak[j] = here[j]; } } } m_cache->setColumn(column, peak); m_coverage.set(column); }