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79 lines
2.0 KiB
79 lines
2.0 KiB
//
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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 <tqpainter.h>
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#include "amarok.h"
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#include "turbine.h"
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void TurbineAnalyzer::analyze( const Scope &scope )
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{
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eraseCanvas();
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TQPainter p( canvas() );
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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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{
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h = log10( scope[i]*256.0 ) * F * 0.5;
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if( h > MAX_HEIGHT )
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h = MAX_HEIGHT;
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if( h > bar_height[i] )
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{
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bar_height[i] = h;
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if( h > peak_height[i] )
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{
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peak_height[i] = h;
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peak_speed[i] = 0.01;
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}
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else goto peak_handling;
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}
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else
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{
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if( bar_height[i] > 0.0 )
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{
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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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{
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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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bitBlt( canvas(), x+1, y, &barPixmap, 0, y );
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bitBlt( canvas(), x+1, hd2, &barPixmap, 0, (int)bar_height[i] );
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p.setPen( Amarok::ColorScheme::Foreground );
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p.drawRect( x, y, COLUMN_WIDTH, (int)bar_height[i]*2 );
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const uint x2 = x+COLUMN_WIDTH-1;
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p.setPen( Amarok::ColorScheme::Text );
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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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