annotate data/model/Dense3DModelPeakCache.cpp @ 545:c603d9439b37

* Add peak cache type for 3d models
author Chris Cannam
date Wed, 04 Feb 2009 13:33:50 +0000
parents
children 95391b480e17
rev   line source
Chris@545 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@545 2
Chris@545 3 /*
Chris@545 4 Sonic Visualiser
Chris@545 5 An audio file viewer and annotation editor.
Chris@545 6 Centre for Digital Music, Queen Mary, University of London.
Chris@545 7 This file copyright 2009 QMUL.
Chris@545 8
Chris@545 9 This program is free software; you can redistribute it and/or
Chris@545 10 modify it under the terms of the GNU General Public License as
Chris@545 11 published by the Free Software Foundation; either version 2 of the
Chris@545 12 License, or (at your option) any later version. See the file
Chris@545 13 COPYING included with this distribution for more information.
Chris@545 14 */
Chris@545 15
Chris@545 16 #include "Dense3DModelPeakCache.h"
Chris@545 17
Chris@545 18 Dense3DModelPeakCache::Dense3DModelPeakCache(DenseThreeDimensionalModel *source,
Chris@545 19 size_t columnsPerPeak) :
Chris@545 20 m_source(source),
Chris@545 21 m_resolution(columnsPerPeak)
Chris@545 22 {
Chris@545 23 m_cache = new EditableDenseThreeDimensionalModel
Chris@545 24 (source->getSampleRate(),
Chris@545 25 getResolution(),
Chris@545 26 source->getHeight(),
Chris@545 27 EditableDenseThreeDimensionalModel::NoCompression,
Chris@545 28 false);
Chris@545 29
Chris@545 30 connect(source, SIGNAL(modelChanged()),
Chris@545 31 this, SLOT(sourceModelChanged()));
Chris@545 32 connect(source, SIGNAL(modelAboutToBeDeleted()),
Chris@545 33 this, SLOT(sourceModelAboutToBeDeleted()));
Chris@545 34
Chris@545 35 }
Chris@545 36
Chris@545 37 Dense3DModelPeakCache::~Dense3DModelPeakCache()
Chris@545 38 {
Chris@545 39 delete m_cache;
Chris@545 40 }
Chris@545 41
Chris@545 42 bool
Chris@545 43 Dense3DModelPeakCache::isColumnAvailable(size_t column) const
Chris@545 44 {
Chris@545 45 if (!m_source) return false;
Chris@545 46 if (haveColumn(column)) return true;
Chris@545 47 for (int i = 0; i < m_resolution; ++i) {
Chris@545 48 if (!m_source->isColumnAvailable(column * m_resolution + i)) {
Chris@545 49 return false;
Chris@545 50 }
Chris@545 51 }
Chris@545 52 return true;
Chris@545 53 }
Chris@545 54
Chris@545 55 Dense3DModelPeakCache::Column
Chris@545 56 Dense3DModelPeakCache::getColumn(size_t column) const
Chris@545 57 {
Chris@545 58 if (!m_source) return Column();
Chris@545 59 if (!haveColumn(column)) fillColumn(column);
Chris@545 60 return m_cache->getColumn(column);
Chris@545 61 }
Chris@545 62
Chris@545 63 float
Chris@545 64 Dense3DModelPeakCache::getValueAt(size_t column, size_t n) const
Chris@545 65 {
Chris@545 66 if (!m_source) return 0.f;
Chris@545 67 if (!haveColumn(column)) fillColumn(column);
Chris@545 68 return m_cache->getValueAt(column, n);
Chris@545 69 }
Chris@545 70
Chris@545 71 void
Chris@545 72 Dense3DModelPeakCache::sourceModelChanged()
Chris@545 73 {
Chris@545 74 if (!m_source) return;
Chris@545 75 m_coverage.resize(getWidth());
Chris@545 76 }
Chris@545 77
Chris@545 78 void
Chris@545 79 Dense3DModelPeakCache::sourceModelAboutToBeDeleted()
Chris@545 80 {
Chris@545 81 m_source = 0;
Chris@545 82 }
Chris@545 83
Chris@545 84 bool
Chris@545 85 Dense3DModelPeakCache::haveColumn(size_t column) const
Chris@545 86 {
Chris@545 87 return m_coverage.get(column);
Chris@545 88 }
Chris@545 89
Chris@545 90 void
Chris@545 91 Dense3DModelPeakCache::fillColumn(size_t column) const
Chris@545 92 {
Chris@545 93 Column peak;
Chris@545 94 for (int i = 0; i < m_resolution; ++i) {
Chris@545 95 Column here = m_source->getColumn(column * m_resolution + i);
Chris@545 96 if (i == 0) {
Chris@545 97 peak = here;
Chris@545 98 } else {
Chris@545 99 for (int j = 0; j < peak.size() && j < here.size(); ++j) {
Chris@545 100 if (here[j] > peak[j]) peak[j] = here[j];
Chris@545 101 }
Chris@545 102 }
Chris@545 103 }
Chris@545 104 m_cache->setColumn(column, peak);
Chris@545 105 m_coverage.set(column);
Chris@545 106 }
Chris@545 107
Chris@545 108