Mercurial > hg > svcore
view data/model/Dense3DModelPeakCache.cpp @ 1008:d9e0e59a1581
When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)
author | Chris Cannam |
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date | Fri, 14 Nov 2014 13:51:33 +0000 |
parents | 59e7fe1b1003 |
children | ece369c5bb68 |
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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, int 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(int 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(int column) const { Profiler profiler("Dense3DModelPeakCache::getColumn"); 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.reset(m_coverage.size()-1); } m_coverage.resize(getWidth()); // retaining data } void Dense3DModelPeakCache::sourceModelAboutToBeDeleted() { m_source = 0; } bool Dense3DModelPeakCache::haveColumn(int column) const { return column < (int)m_coverage.size() && m_coverage.get(column); } void Dense3DModelPeakCache::fillColumn(int column) const { Profiler profiler("Dense3DModelPeakCache::fillColumn"); if (column >= (int)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 < int(m_resolution); ++i) { Column here = m_source->getColumn(column * m_resolution + i); if (i == 0) { peak = here; } else { for (int j = 0; j < (int)peak.size() && j < (int)here.size(); ++j) { if (here[j] > peak[j]) peak[j] = here[j]; } } } m_cache->setColumn(column, peak); m_coverage.set(column); }