# include <qx11info_x11.h>
#endif
+#include <math.h>
+
/**********************************************************************
* Video Widget. A simple frame on which video is drawn
* This class handles resize issues
speedSlider->setOrientation( Qt::Vertical );
speedSlider->setTickPosition( QSlider::TicksRight );
- speedSlider->setRange( -100, 100 );
- speedSlider->setSingleStep( 10 );
- speedSlider->setPageStep( 20 );
- speedSlider->setTickInterval( 20 );
+ speedSlider->setRange( -24, 24 );
+ speedSlider->setSingleStep( 1 );
+ speedSlider->setPageStep( 1 );
+ speedSlider->setTickInterval( 12 );
CONNECT( speedSlider, valueChanged( int ), this, updateRate( int ) );
QToolButton *normalSpeedButton = new QToolButton( this );
normalSpeedButton->setMaximumSize( QSize( 26, 20 ) );
normalSpeedButton->setAutoRaise( true );
- normalSpeedButton->setText( "N" );
+ normalSpeedButton->setText( "1x" );
normalSpeedButton->setToolTip( qtr( "Revert to normal play speed" ) );
CONNECT( normalSpeedButton, clicked(), this, resetRate() );
QVBoxLayout *speedControlLayout = new QVBoxLayout;
+ speedControlLayout->setLayoutMargins( 4, 4, 4, 4, 4 );
+ speedControlLayout->setSpacing( 4 );
speedControlLayout->addWidget( speedSlider );
speedControlLayout->addWidget( normalSpeedButton );
setLayout( speedControlLayout );
speedSlider->setEnabled( b_enable );
}
-#define RATE_SLIDER_MAXIMUM 3.0
-#define RATE_SLIDER_MINIMUM 0.3
-#define RATE_SLIDER_LENGTH 100.0
-
void SpeedControlWidget::updateControls( int rate )
{
if( speedSlider->isSliderDown() )
return;
}
- int sliderValue;
- double speed = INPUT_RATE_DEFAULT / (double)rate;
+ double value = 12 * log( (double)INPUT_RATE_DEFAULT / rate ) / log( 2 );
+ int sliderValue = (int) ( ( value > 0 ) ? value + .5 : value - .5 );
- if( rate >= INPUT_RATE_DEFAULT )
+ if( sliderValue < speedSlider->minimum() )
{
- if( speed < RATE_SLIDER_MINIMUM )
- {
- sliderValue = speedSlider->minimum();
- }
- else
- {
- sliderValue = (int)( ( speed - 1.0 ) * RATE_SLIDER_LENGTH
- / ( 1.0 - RATE_SLIDER_MAXIMUM ) );
- }
+ sliderValue = speedSlider->minimum();
}
- else
+ else if( sliderValue > speedSlider->maximum() )
{
- if( speed > RATE_SLIDER_MAXIMUM )
- {
- sliderValue = speedSlider->maximum();
- }
- else
- {
- sliderValue = (int)( ( speed - 1.0 ) * RATE_SLIDER_LENGTH
- / ( RATE_SLIDER_MAXIMUM - 1.0 ) );
- }
+ sliderValue = speedSlider->maximum();
}
//Block signals to avoid feedback loop
void SpeedControlWidget::updateRate( int sliderValue )
{
- int rate;
-
- if( sliderValue < 0.0 )
- {
- rate = (int)(INPUT_RATE_DEFAULT* RATE_SLIDER_LENGTH /
- ( sliderValue * ( 1.0 - RATE_SLIDER_MINIMUM ) + RATE_SLIDER_LENGTH ));
- }
- else
- {
- rate = (int)(INPUT_RATE_DEFAULT* RATE_SLIDER_LENGTH /
- ( sliderValue * ( RATE_SLIDER_MAXIMUM - 1.0 ) + RATE_SLIDER_LENGTH ));
- }
+ double speed = pow( 2, (double)sliderValue / 12 );
+ int rate = INPUT_RATE_DEFAULT / speed;
THEMIM->getIM()->setRate(rate);
}