Mercurial > hg > svcore
view data/model/Dense3DModelPeakCache.cpp @ 1520:954d0cf29ca7 import-audio-data
Switch the normalisation option in WritableWaveFileModel from normalising on read to normalising on write, so that the saved file is already normalised and therefore can be read again without having to remember to normalise it
author | Chris Cannam |
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date | Wed, 12 Sep 2018 13:56:56 +0100 |
parents | 48e9f538e6e9 |
children | 70e172e6cc59 |
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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" #include "base/HitCount.h" Dense3DModelPeakCache::Dense3DModelPeakCache(const DenseThreeDimensionalModel *source, int columnsPerPeak) : m_source(source), m_columnsPerPeak(columnsPerPeak) { 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() { if (m_cache) m_cache->aboutToDelete(); delete m_cache; } Dense3DModelPeakCache::Column Dense3DModelPeakCache::getColumn(int column) const { if (!m_source) return Column(); if (!haveColumn(column)) fillColumn(column); return m_cache->getColumn(column); } float Dense3DModelPeakCache::getValueAt(int column, int 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[m_coverage.size()-1] = false; } m_coverage.resize(getWidth(), false); // retaining data } void Dense3DModelPeakCache::sourceModelAboutToBeDeleted() { m_source = 0; } bool Dense3DModelPeakCache::haveColumn(int column) const { static HitCount count("Dense3DModelPeakCache"); if (in_range_for(m_coverage, column) && m_coverage[column]) { count.hit(); return true; } else { count.miss(); return false; } } void Dense3DModelPeakCache::fillColumn(int column) const { Profiler profiler("Dense3DModelPeakCache::fillColumn"); if (!in_range_for(m_coverage, column)) { 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[m_coverage.size()-1] = false; } m_coverage.resize(column + 1, false); } int sourceWidth = m_source->getWidth(); Column peak; int n = 0; for (int i = 0; i < m_columnsPerPeak; ++i) { int sourceColumn = column * m_columnsPerPeak + i; if (sourceColumn >= sourceWidth) break; Column here = m_source->getColumn(sourceColumn); // cerr << "Dense3DModelPeakCache::fillColumn(" << column << "): source col " // << sourceColumn << " of " << sourceWidth // << " returned " << here.size() << " elts" << endl; if (i == 0) { peak = here; n = int(peak.size()); } else { int m = std::min(n, int(here.size())); for (int j = 0; j < m; ++j) { peak[j] = std::max(here[j], peak[j]); } } } m_cache->setColumn(column, peak); m_coverage[column] = true; }