76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
//
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//
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// C++ Implementation: Sonogram
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//
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// Description:
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//
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//
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// Author: Melchior FRANZ <mfranz@kde.org>, (C) 2004
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//
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// Copyright: See COPYING file that comes with this distribution
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//
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//
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#include "sonogram.h"
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#include <QPainter>
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const char* Sonogram::kName =
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QT_TRANSLATE_NOOP("AnalyzerContainer", "Sonogram");
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Sonogram::Sonogram(QWidget* parent) : Analyzer::Base(parent, 9) {}
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Sonogram::~Sonogram() {}
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void Sonogram::resizeEvent(QResizeEvent* e) {
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QWidget::resizeEvent(e);
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// only for gcc < 4.0
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#if !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 0))
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resizeForBands(height() < 128 ? 128 : height());
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#endif
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canvas_ = QPixmap(size());
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canvas_.fill(palette().color(QPalette::Background));
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}
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void Sonogram::analyze(QPainter& p, const Scope& s, bool new_frame) {
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int x = width() - 1;
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QColor c;
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QPainter canvas_painter(&canvas_);
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canvas_painter.drawPixmap(0, 0, canvas_, 1, 0, x, -1);
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Scope::const_iterator it = s.begin(), end = s.end();
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for (int y = height() - 1; y;) {
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if (it >= end || *it < .005)
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c = palette().color(QPalette::Background);
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else if (*it < .05)
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c.setHsv(95, 255, 255 - int(*it * 4000.0));
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else if (*it < 1.0)
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c.setHsv(95 - int(*it * 90.0), 255, 255);
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else
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c = Qt::red;
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canvas_painter.setPen(c);
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canvas_painter.drawPoint(x, y--);
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if (it < end) ++it;
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}
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canvas_painter.end();
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p.drawPixmap(0, 0, canvas_);
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}
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void Sonogram::transform(Scope& scope) {
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float* front = static_cast<float*>(&scope.front());
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m_fht->power2(front);
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m_fht->scale(front, 1.0 / 256);
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scope.resize(m_fht->size() / 2);
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}
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void Sonogram::demo(QPainter& p) {
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analyze(p, Scope(m_fht->size(), 0), new_frame_);
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}
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