Functions
FSecs	_FSecs (TimeValue const &timeVal)

double	approx (Rat r)

bool	isMicroGridAligned (FSecs duration)

TimeVar	operator+ (Time const &tval, TimeVar const &tvar)

TimeVar	operator- (Time const &tval, TimeVar const &tvar)

int	toxicDegree (Rat poison, const int64_t THRESHOLD=HAZARD_DEGREE)

Variables
const FSecs	DEFAULT_CANVAS {23}

const Rat	DEFAULT_METRIC {25}

const int64_t	HAZARD_DEGREE {util::ilog2(LIM_HAZARD)}

const int64_t	LIM_HAZARD {int64_t{1} << 40 }
	Maximum quantiser to be handled in fractional arithmetics without hazard. More...

const uint	MAX_PX_WIDTH {100000}

const FSecs	MAX_TIMESPAN {_FSecs(Duration::MAX)}

const int64_t	MAXDIM {util::ilog2 (std::numeric_limits<int64_t>::max())}

const FSecs	MICRO_TICK {1_r/Time::SCALE}

Function Documentation

◆ _FSecs()

FSecs stage::model::anonymous_namespace{zoom-window.hpp}::_FSecs ( TimeValue const & timeVal )

inline

preliminary helper to enter into fractional integer calculations

FSecs (maybe better called RSec) should be a light-weight wrapper on top of util::Rat = boost::rational<int64_t>
a conversion function like in TimeVar should be in the base type
however, cross conversion from raw int64_t should be prohibited to avoid ill-guided automatic conversions from µ-tick to seconds

Definition at line 135 of file zoom-window.hpp.

Here is the caller graph for this function:

bool stage::model::anonymous_namespace{zoom-window.hpp}::isMicroGridAligned ( FSecs duration )

inline

Returns: true if the given duration can be represented cleanly as µ-ticks.

Remarks: decision can be broken down to the remainder term: n/d = i + r/d; when expanding with *u/u, result is clean if u/d is non-fractional.

Definition at line 147 of file zoom-window.hpp.

TimeVar stage::model::anonymous_namespace{zoom-window.hpp}::operator+	(	Time const &	tval,
		TimeVar const &	tvar
	)

inline

Todo:: we need these only because the blurry distinction between lib::time::TimeValue and lib::time::Time, which in turn is caused by a lack of clarity in the fundamental conception (see #1261)

Definition at line 164 of file zoom-window.hpp.

const int64_t LIM_HAZARD {int64_t{1} << 40 }

Maximum quantiser to be handled in fractional arithmetics without hazard.

Remarks: due to the common divisor normalisation, and the typical time computations, DENOMINATOR * Time::Scale has to stay below INT_MAX, with some safety margin

Definition at line 190 of file zoom-window.hpp.