Clementine-audio-player-Mac.../src/analyzers/turbine.cpp

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