69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
//
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// Amarok BarAnalyzer 3 - Jet Turbine: Symmetric version of analyzer 1
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//
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// Author: Stanislav Karchebny <berkus@users.sf.net>, (C) 2003
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// Max Howell (I modified it to use boom analyzer code)
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//
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// Copyright: like rest of Amarok
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//
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#include <cmath>
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#include <QPainter>
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#include "turbine.h"
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const char* TurbineAnalyzer::kName =
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QT_TRANSLATE_NOOP("AnalyzerContainer", "Turbine");
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void TurbineAnalyzer::analyze(QPainter& p, const Scope& scope, bool new_frame) {
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float h;
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const uint hd2 = height() / 2;
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const uint MAX_HEIGHT = hd2 - 1;
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for (uint i = 0, x = 0, y; i < BAND_COUNT; ++i, x += COLUMN_WIDTH + 1) {
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h = log10(scope[i] * 256.0) * F * 0.5;
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if (h > MAX_HEIGHT) h = MAX_HEIGHT;
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if (h > bar_height[i]) {
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bar_height[i] = h;
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if (h > peak_height[i]) {
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peak_height[i] = h;
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peak_speed[i] = 0.01;
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} else
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goto peak_handling;
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} else {
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if (bar_height[i] > 0.0) {
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bar_height[i] -= K_barHeight; // 1.4
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if (bar_height[i] < 0.0) bar_height[i] = 0.0;
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}
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peak_handling:
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if (peak_height[i] > 0.0) {
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peak_height[i] -= peak_speed[i];
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peak_speed[i] *= F_peakSpeed; // 1.12
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if (peak_height[i] < bar_height[i]) peak_height[i] = bar_height[i];
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if (peak_height[i] < 0.0) peak_height[i] = 0.0;
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}
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}
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y = hd2 - uint(bar_height[i]);
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p.drawPixmap(x + 1, y, barPixmap, 0, y, -1, -1);
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p.drawPixmap(x + 1, hd2, barPixmap, 0, int(bar_height[i]), -1, -1);
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p.setPen(palette().color(QPalette::Highlight));
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if (bar_height[i] > 0)
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p.drawRect(x, y, COLUMN_WIDTH - 1, (int)bar_height[i] * 2 - 1);
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const uint x2 = x + COLUMN_WIDTH - 1;
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p.setPen(palette().color(QPalette::Base));
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y = hd2 - uint(peak_height[i]);
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p.drawLine(x, y, x2, y);
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y = hd2 + uint(peak_height[i]);
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p.drawLine(x, y, x2, y);
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}
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}
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