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#ifndef __AUTO_SPEED_CONTROL_H__
#define __AUTO_SPEED_CONTROL_H__
#include "DasherTypes.h"
#include "DasherView.h"
#include "Messages.h"
#include "SettingsStore.h"
#include <deque>
/// \defgroup AutoSpeed Auto speed control
/// @{
namespace Dasher {
class CAutoSpeedControl : private CSettingsUser {
public:
CAutoSpeedControl(CSettingsUser *pCreateFrom, CMessageDisplay *pMsgs);
///
/// AUTO-SPEED-CONTROL
/// This is the main speed control function and drives all of auto speed control.
/// \param iDasherX non-linear Dasher x coord
/// \param iDasherY non-linear Dasher y coord
/// \param dFrameRate The current frame rate
/// \param pView The current Dasher view class
///
void SpeedControl(myint iDasherX, myint iDasherY, CDasherView *pView);
private:
///
/// AUTO-SPEED-CONTROL
/// Calculates the running variance of the angle between the +ve x-axis and the line joining
/// the cross hair to the mouse position.
///
inline double Variance();
///
/// AUTO-SPEED-CONTROL
/// Updates the exclusion radius for auto speed control.
///
inline double UpdateMinRadius();
///
/// AUTO-SPEED-CONTROL
/// Applies changes to the max bit rate depending on the running variance
/// of the angle between the +ve x-axis and the line joining
/// the cross hair to the mouse position.
///
double UpdateBitrate();
///
/// AUTO-SPEED-CONTROL
/// Adapts the number of samples taken so that auto speed control
/// is invariant to clock rate and user ability (!!!).
///
inline int UpdateSampleSize(double dFrameRate);
///
/// AUTO-SPEED-CONTROL
/// Updates the *variances* of the two populations of mixture-of-2-Gaussians
/// distribution of radii. These are used to calculate the exclusion radius.
/// \param r radius
/// \param dFrameRate The current frame rate
///
void UpdateSigmas(double r, double dFrameRate);
double m_dBitrate; // stores max bit rate internally
double m_dSampleScale, m_dSampleOffset; // internal, control sample size
unsigned int m_nSpeedCounter; // keep track of how many samples
unsigned int m_nSpeedSamples; // upper limit on #samples
double m_dSpeedMax, m_dSpeedMin; // bit rate always within this range
double m_dTier1, m_dTier2, m_dTier3, m_dTier4; // variance tolerance tiers
double m_dChange1, m_dChange2, m_dChange3, m_dChange4; // fractional changes to bit rate
double m_dMinRRate; // controls rate at which min. r adapts HIGHER===SLOWER!
double m_dSensitivity; // not used, control sensitivity of auto speed control
typedef std::deque<double> DOUBLE_DEQUE;
DOUBLE_DEQUE m_dequeAngles; // store angles for statistics
//variables for adaptive radius calculations...
double m_dSigma1, m_dSigma2, m_dMinRadius;
CMessageDisplay *m_pMsgs;
};
}
/// @}
#endif
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