annotate layer/ColourScale.cpp @ 1154:07e8ac88bcce 3.0-integration

Add out-of-process execution to prefs dialog Also, scale the window shape preview labels 'cos they look funny
author Chris Cannam
date Fri, 21 Oct 2016 14:40:48 +0100
parents c53ed1a6fcbd
children 822edd9bb665
rev   line source
Chris@1068 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@1068 2
Chris@1068 3 /*
Chris@1068 4 Sonic Visualiser
Chris@1068 5 An audio file viewer and annotation editor.
Chris@1068 6 Centre for Digital Music, Queen Mary, University of London.
Chris@1068 7 This file copyright 2006-2016 Chris Cannam and QMUL.
Chris@1068 8
Chris@1068 9 This program is free software; you can redistribute it and/or
Chris@1068 10 modify it under the terms of the GNU General Public License as
Chris@1068 11 published by the Free Software Foundation; either version 2 of the
Chris@1068 12 License, or (at your option) any later version. See the file
Chris@1068 13 COPYING included with this distribution for more information.
Chris@1068 14 */
Chris@1068 15
Chris@1068 16 #include "ColourScale.h"
Chris@1068 17
Chris@1068 18 #include "base/AudioLevel.h"
Chris@1068 19 #include "base/LogRange.h"
Chris@1068 20
Chris@1068 21 #include <cmath>
Chris@1129 22 #include <iostream>
Chris@1129 23
Chris@1129 24 using namespace std;
Chris@1068 25
Chris@1068 26 int ColourScale::m_maxPixel = 255;
Chris@1068 27
Chris@1070 28 ColourScale::ColourScale(Parameters parameters) :
Chris@1070 29 m_params(parameters),
Chris@1070 30 m_mapper(m_params.colourMap, 1.f, double(m_maxPixel))
Chris@1068 31 {
Chris@1070 32 if (m_params.minValue >= m_params.maxValue) {
Chris@1129 33 cerr << "ERROR: ColourScale::ColourScale: minValue = "
Chris@1129 34 << m_params.minValue << ", maxValue = " << m_params.maxValue << endl;
Chris@1068 35 throw std::logic_error("maxValue must be greater than minValue");
Chris@1068 36 }
Chris@1068 37
Chris@1070 38 m_mappedMin = m_params.minValue;
Chris@1070 39 m_mappedMax = m_params.maxValue;
Chris@1068 40
Chris@1127 41 if (m_mappedMin < m_params.threshold) {
Chris@1127 42 m_mappedMin = m_params.threshold;
Chris@1127 43 }
Chris@1127 44
Chris@1137 45 if (m_params.scaleType == ColourScaleType::Log) {
Chris@1068 46
Chris@1068 47 LogRange::mapRange(m_mappedMin, m_mappedMax);
Chris@1068 48
Chris@1137 49 } else if (m_params.scaleType == ColourScaleType::PlusMinusOne) {
Chris@1068 50
Chris@1068 51 m_mappedMin = -1.0;
Chris@1068 52 m_mappedMax = 1.0;
Chris@1068 53
Chris@1137 54 } else if (m_params.scaleType == ColourScaleType::Absolute) {
Chris@1068 55
Chris@1068 56 m_mappedMin = fabs(m_mappedMin);
Chris@1068 57 m_mappedMax = fabs(m_mappedMax);
Chris@1068 58 if (m_mappedMin >= m_mappedMax) {
Chris@1068 59 std::swap(m_mappedMin, m_mappedMax);
Chris@1068 60 }
Chris@1068 61 }
Chris@1068 62
Chris@1068 63 if (m_mappedMin >= m_mappedMax) {
Chris@1129 64 cerr << "ERROR: ColourScale::ColourScale: minValue = " << m_params.minValue
Chris@1129 65 << ", maxValue = " << m_params.maxValue
Chris@1129 66 << ", threshold = " << m_params.threshold
Chris@1137 67 << ", scale = " << int(m_params.scaleType)
Chris@1129 68 << " resulting in mapped minValue = " << m_mappedMin
Chris@1129 69 << ", mapped maxValue = " << m_mappedMax << endl;
Chris@1068 70 throw std::logic_error("maxValue must be greater than minValue [after mapping]");
Chris@1068 71 }
Chris@1068 72 }
Chris@1068 73
Chris@1071 74 ColourScale::~ColourScale()
Chris@1071 75 {
Chris@1071 76 }
Chris@1071 77
Chris@1105 78 ColourScaleType
Chris@1079 79 ColourScale::getScale() const
Chris@1079 80 {
Chris@1137 81 return m_params.scaleType;
Chris@1079 82 }
Chris@1079 83
Chris@1068 84 int
Chris@1079 85 ColourScale::getPixel(double value) const
Chris@1068 86 {
Chris@1068 87 double maxPixF = m_maxPixel;
Chris@1068 88
Chris@1137 89 if (m_params.scaleType == ColourScaleType::Phase) {
Chris@1068 90 double half = (maxPixF - 1.f) / 2.f;
Chris@1138 91 int pixel = 1 + int((value * half) / M_PI + half);
Chris@1143 92 // cerr << "phase = " << value << " pixel = " << pixel << endl;
Chris@1138 93 return pixel;
Chris@1068 94 }
Chris@1068 95
Chris@1070 96 value *= m_params.gain;
Chris@1137 97
Chris@1070 98 if (value < m_params.threshold) return 0;
Chris@1068 99
Chris@1068 100 double mapped = value;
Chris@1068 101
Chris@1137 102 if (m_params.scaleType == ColourScaleType::Log) {
Chris@1068 103 mapped = LogRange::map(value);
Chris@1137 104 } else if (m_params.scaleType == ColourScaleType::PlusMinusOne) {
Chris@1068 105 if (mapped < -1.f) mapped = -1.f;
Chris@1068 106 if (mapped > 1.f) mapped = 1.f;
Chris@1137 107 } else if (m_params.scaleType == ColourScaleType::Absolute) {
Chris@1068 108 if (mapped < 0.f) mapped = -mapped;
Chris@1068 109 }
Chris@1137 110
Chris@1137 111 mapped *= m_params.multiple;
Chris@1137 112
Chris@1068 113 if (mapped < m_mappedMin) {
Chris@1068 114 mapped = m_mappedMin;
Chris@1068 115 }
Chris@1068 116 if (mapped > m_mappedMax) {
Chris@1068 117 mapped = m_mappedMax;
Chris@1068 118 }
Chris@1068 119
Chris@1068 120 double proportion = (mapped - m_mappedMin) / (m_mappedMax - m_mappedMin);
Chris@1068 121
Chris@1068 122 int pixel = 0;
Chris@1068 123
Chris@1137 124 if (m_params.scaleType == ColourScaleType::Meter) {
Chris@1068 125 pixel = AudioLevel::multiplier_to_preview(proportion, m_maxPixel-1) + 1;
Chris@1068 126 } else {
Chris@1068 127 pixel = int(proportion * maxPixF) + 1;
Chris@1068 128 }
Chris@1068 129
Chris@1070 130 if (pixel < 0) {
Chris@1070 131 pixel = 0;
Chris@1070 132 }
Chris@1070 133 if (pixel > m_maxPixel) {
Chris@1070 134 pixel = m_maxPixel;
Chris@1070 135 }
Chris@1068 136 return pixel;
Chris@1068 137 }
Chris@1068 138
Chris@1068 139 QColor
Chris@1079 140 ColourScale::getColourForPixel(int pixel, int rotation) const
Chris@1068 141 {
Chris@1068 142 if (pixel < 0) {
Chris@1068 143 pixel = 0;
Chris@1068 144 }
Chris@1068 145 if (pixel > m_maxPixel) {
Chris@1068 146 pixel = m_maxPixel;
Chris@1068 147 }
Chris@1068 148 if (pixel == 0) {
Chris@1068 149 if (m_mapper.hasLightBackground()) {
Chris@1068 150 return Qt::white;
Chris@1068 151 } else {
Chris@1068 152 return Qt::black;
Chris@1068 153 }
Chris@1068 154 } else {
Chris@1068 155 int target = int(pixel) + rotation;
Chris@1068 156 while (target < 1) target += m_maxPixel;
Chris@1068 157 while (target > m_maxPixel) target -= m_maxPixel;
Chris@1068 158 return m_mapper.map(double(target));
Chris@1068 159 }
Chris@1068 160 }