Mercurial > hg > svcore
view data/model/Dense3DModelPeakCache.cpp @ 867:42551e9c5b25 tonioni
Play these with a pitch now (since we support any frequency)
author | Chris Cannam |
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date | Wed, 08 Jan 2014 09:59:08 +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); }