time-grid.hpp File Reference

To establish a reference scale for quantised time values. More...

Go to the source code of this file.

Description

To establish a reference scale for quantised time values.

Contrary to the continuous Time values (Lumiera internal time scale), quantised time can only take on some discrete values corresponding to blocks or frames, according to the respective timecode format. The act of quantising continuous time values requires the definition of a time grid of such allowed time values. At least, the specification of a time origin and a frame spacing is required, but there might be way more elaborate specifications, e.g. a grid varying over time.

Time grid specifications are integrated into Lumiera's framework for meta assets, automation, configuration and similar metadata.

using time grids

TimeGrid is an interface (ABC), but provides some actual factory functions, which can be used as a convenience shortcut to fabricate the kind of simple time grid used most often.

See also

MetaFactory creating concrete asset::Meta instances

time::Quantiser

Definition in file time-grid.hpp.

#include "steam/asset/meta.hpp"
#include "lib/idi/entry-id.hpp"
#include "lib/time/grid.hpp"
#include "lib/time/timevalue.hpp"
#include "lib/symbol.hpp"

Namespaces
namespace	steam
	Steam-Layer implementation namespace root.
namespace	steam::asset
	The asset subsystem of the Steam-Layer.
namespace	steam::asset::meta

Typedefs
using	PGrid = lib::P< TimeGrid >
using	GridID = lib::idi::EntryID< TimeGrid >

Classes
class	TimeGrid
	Interface: a grid and scale definition for time quantisation. More...
struct	Builder< TimeGrid >