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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2009 QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #include "Dense3DModelPeakCache.h"
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17
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18 #include "base/Profiler.h"
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19
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20 #include "base/HitCount.h"
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21
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22 Dense3DModelPeakCache::Dense3DModelPeakCache(ModelId sourceId,
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23 int columnsPerPeak) :
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24 m_source(sourceId),
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25 m_columnsPerPeak(columnsPerPeak)
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26 {
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27 auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
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28 if (!source) {
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29 SVCERR << "WARNING: Dense3DModelPeakCache constructed for unknown or wrong-type source model id " << m_source << endl;
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30 m_source = {};
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31 return;
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32 }
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33
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34 m_cache.reset(new EditableDenseThreeDimensionalModel
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35 (source->getSampleRate(),
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36 source->getResolution() * m_columnsPerPeak,
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37 source->getHeight(),
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38 EditableDenseThreeDimensionalModel::NoCompression,
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39 false));
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40
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41 connect(source.get(), SIGNAL(modelChanged(ModelId)),
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42 this, SLOT(sourceModelChanged(ModelId)));
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43 }
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44
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45 Dense3DModelPeakCache::~Dense3DModelPeakCache()
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46 {
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47 }
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48
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49 Dense3DModelPeakCache::Column
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50 Dense3DModelPeakCache::getColumn(int column) const
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51 {
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52 if (!haveColumn(column)) fillColumn(column);
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53 return m_cache->getColumn(column);
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54 }
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55
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56 float
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57 Dense3DModelPeakCache::getValueAt(int column, int n) const
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58 {
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59 if (!haveColumn(column)) fillColumn(column);
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60 return m_cache->getValueAt(column, n);
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61 }
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62
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63 void
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64 Dense3DModelPeakCache::sourceModelChanged(ModelId)
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65 {
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66 if (m_coverage.size() > 0) {
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67 // The last peak may have come from an incomplete read, which
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68 // may since have been filled, so reset it
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69 m_coverage[m_coverage.size()-1] = false;
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70 }
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71 m_coverage.resize(getWidth(), false); // retaining data
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72 }
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73
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74 bool
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75 Dense3DModelPeakCache::haveColumn(int column) const
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76 {
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77 static HitCount count("Dense3DModelPeakCache");
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78 if (in_range_for(m_coverage, column) && m_coverage[column]) {
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79 count.hit();
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80 return true;
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81 } else {
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82 count.miss();
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83 return false;
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84 }
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85 }
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86
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87 void
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88 Dense3DModelPeakCache::fillColumn(int column) const
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89 {
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90 Profiler profiler("Dense3DModelPeakCache::fillColumn");
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91
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92 if (!in_range_for(m_coverage, column)) {
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93 if (m_coverage.size() > 0) {
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94 // The last peak may have come from an incomplete read, which
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95 // may since have been filled, so reset it
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96 m_coverage[m_coverage.size()-1] = false;
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97 }
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98 m_coverage.resize(column + 1, false);
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99 }
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100
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101 auto source = ModelById::getAs<DenseThreeDimensionalModel>(m_source);
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102 if (!source) return;
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103
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104 int sourceWidth = source->getWidth();
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105
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106 Column peak;
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107 int n = 0;
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108 for (int i = 0; i < m_columnsPerPeak; ++i) {
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109
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110 int sourceColumn = column * m_columnsPerPeak + i;
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111 if (sourceColumn >= sourceWidth) break;
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112
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113 Column here = source->getColumn(sourceColumn);
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114
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115 // cerr << "Dense3DModelPeakCache::fillColumn(" << column << "): source col "
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116 // << sourceColumn << " of " << sourceWidth
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117 // << " returned " << here.size() << " elts" << endl;
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118
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119 if (i == 0) {
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120 peak = here;
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121 n = int(peak.size());
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122 } else {
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123 int m = std::min(n, int(here.size()));
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124 for (int j = 0; j < m; ++j) {
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125 peak[j] = std::max(here[j], peak[j]);
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126 }
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127 }
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128 }
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129
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130 m_cache->setColumn(column, peak);
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131 m_coverage[column] = true;
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132 }
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133
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134
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