GI.GstVideo.Interfaces.ColorBalance

This interface is implemented by elements which can perform some color balance operation on video frames they process. For example, modifying the brightness, contrast, hue or saturation.

Example elements are 'xvimagesink' and 'colorbalance'

Exported types

newtype ColorBalance

Constructors

ColorBalance (ManagedPtr ColorBalance)

Instances

GObject ColorBalance

Methods

gobjectType :: ColorBalance -> IO GType

IsObject ColorBalance

IsColorBalance ColorBalance

noColorBalance :: Maybe ColorBalance

class GObject o => IsColorBalance o

Instances

(GObject a, UnknownAncestorError Constraint ColorBalance a) => IsColorBalance a

IsColorBalance ColorBalance

toColorBalance :: (MonadIO m, IsColorBalance o) => o -> m ColorBalance

Methods

getBalanceType

colorBalanceGetBalanceType

Arguments

:: (HasCallStack, MonadIO m, IsColorBalance a)

=> a

balance: The ColorBalance implementation

-> m ColorBalanceType

Returns: A the ColorBalanceType.

Get the ColorBalanceType of this implementation.

getValue

colorBalanceGetValue

Arguments

:: (HasCallStack, MonadIO m, IsColorBalance a, IsColorBalanceChannel b)

=> a

balance: A ColorBalance instance

-> b

channel: A ColorBalanceChannel instance

-> m Int32

Returns: The current value of the channel.

Retrieve the current value of the indicated channel, between min_value and max_value.

See Also: The ColorBalanceChannel.min_value and ColorBalanceChannel.max_value members of the ColorBalanceChannel object.

listChannels

colorBalanceListChannels

Arguments

:: (HasCallStack, MonadIO m, IsColorBalance a)

=> a

balance: A ColorBalance instance

-> m [ColorBalanceChannel]

Returns: A GList containing pointers to ColorBalanceChannel objects. The list is owned by the ColorBalance instance and must not be freed.

Retrieve a list of the available channels.

setValue

colorBalanceSetValue

Arguments

:: (HasCallStack, MonadIO m, IsColorBalance a, IsColorBalanceChannel b)

=> a

balance: A ColorBalance instance

-> b

channel: A ColorBalanceChannel instance

-> Int32

value: The new value for the channel.

-> m ()

Sets the current value of the channel to the passed value, which must be between min_value and max_value.

See Also: The ColorBalanceChannel.min_value and ColorBalanceChannel.max_value members of the ColorBalanceChannel object.

valueChanged

colorBalanceValueChanged

Arguments

:: (HasCallStack, MonadIO m, IsColorBalance a, IsColorBalanceChannel b)

=> a

balance: A ColorBalance instance

-> b

channel: A ColorBalanceChannel whose value has changed

-> Int32

value: The new value of the channel

-> m ()

A helper function called by implementations of the GstColorBalance interface. It fires the ColorBalance::value-changed signal on the instance, and the ColorBalanceChannel::value-changed signal on the channel object.

Signals

valueChanged

type C_ColorBalanceValueChangedCallback = Ptr () -> Ptr ColorBalanceChannel -> Int32 -> Ptr () -> IO ()

type ColorBalanceValueChangedCallback = ColorBalanceChannel -> Int32 -> IO ()

afterColorBalanceValueChanged :: (IsColorBalance a, MonadIO m) => a -> ColorBalanceValueChangedCallback -> m SignalHandlerId

genClosure_ColorBalanceValueChanged :: ColorBalanceValueChangedCallback -> IO Closure

mk_ColorBalanceValueChangedCallback :: C_ColorBalanceValueChangedCallback -> IO (FunPtr C_ColorBalanceValueChangedCallback)

noColorBalanceValueChangedCallback :: Maybe ColorBalanceValueChangedCallback

onColorBalanceValueChanged :: (IsColorBalance a, MonadIO m) => a -> ColorBalanceValueChangedCallback -> m SignalHandlerId

wrap_ColorBalanceValueChangedCallback :: ColorBalanceValueChangedCallback -> Ptr () -> Ptr ColorBalanceChannel -> Int32 -> Ptr () -> IO ()