GI.Gst.Objects.SystemClock

The GStreamer core provides a GstSystemClock based on the system time. Asynchronous callbacks are scheduled from an internal thread.

Clock implementors are encouraged to subclass this systemclock as it implements the async notification.

Subclasses can however override all of the important methods for sync and async notifications to implement their own callback methods or blocking wait operations.

Exported types

newtype SystemClock

Memory-managed wrapper type.

Constructors

SystemClock (ManagedPtr SystemClock)

Instances

GObject SystemClock

Defined in GI.Gst.Objects.SystemClock

Methods

gobjectType :: IO GType

HasParentTypes SystemClock

Defined in GI.Gst.Objects.SystemClock

type ParentTypes SystemClock

Defined in GI.Gst.Objects.SystemClock

type ParentTypes SystemClock = Clock ': (Object ': (Object ': ([] :: [Type])))

class (GObject o, IsDescendantOf SystemClock o) => IsSystemClock o

Type class for types which can be safely cast to SystemClock, for instance with toSystemClock.

Instances

(GObject o, IsDescendantOf SystemClock o) => IsSystemClock o

Defined in GI.Gst.Objects.SystemClock

toSystemClock :: (MonadIO m, IsSystemClock o) => o -> m SystemClock

Cast to SystemClock, for types for which this is known to be safe. For general casts, use castTo.

noSystemClock :: Maybe SystemClock

A convenience alias for Nothing :: Maybe SystemClock.

Methods

obtain

systemClockObtain

Arguments

:: (HasCallStack, MonadIO m)

=> m Clock

Returns: the default clock.

MT safe.

Get a handle to the default system clock. The refcount of the clock will be increased so you need to unref the clock after usage.

setDefault

systemClockSetDefault

Arguments

:: (HasCallStack, MonadIO m, IsClock a)

=> Maybe a

newClock: a Clock

-> m ()

Sets the default system clock that can be obtained with systemClockObtain.

This is mostly used for testing and debugging purposes when you want to have control over the time reported by the default system clock.

MT safe.

Since: 1.4

Properties

clockType

No description available in the introspection data.

constructSystemClockClockType :: IsSystemClock o => ClockType -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “clock-type” property. This is rarely needed directly, but it is used by new.

getSystemClockClockType :: (MonadIO m, IsSystemClock o) => o -> m ClockType

Get the value of the “clock-type” property. When overloading is enabled, this is equivalent to

get systemClock #clockType

setSystemClockClockType :: (MonadIO m, IsSystemClock o) => o -> ClockType -> m ()

Set the value of the “clock-type” property. When overloading is enabled, this is equivalent to

set systemClock [ #clockType := value ]