GI.GstVideo.Structs.VideoMetaTransform

Extra data passed to a video transform MetaTransformFunction such as: "gst-video-scale".

Exported types

newtype VideoMetaTransform

Memory-managed wrapper type.

Constructors

VideoMetaTransform (ManagedPtr VideoMetaTransform)

Instances

WrappedPtr VideoMetaTransform

Methods

wrappedPtrCalloc :: IO (Ptr VideoMetaTransform)

wrappedPtrCopy :: VideoMetaTransform -> IO VideoMetaTransform

wrappedPtrFree :: Maybe (FunPtr (Ptr VideoMetaTransform -> IO ()))

(~) AttrOpTag tag AttrSet => Constructible VideoMetaTransform tag

Methods

new :: MonadIO m => (ManagedPtr VideoMetaTransform -> VideoMetaTransform) -> [AttrOp VideoMetaTransform tag] -> m VideoMetaTransform

newZeroVideoMetaTransform :: MonadIO m => m VideoMetaTransform

Construct a VideoMetaTransform struct initialized to zero.

noVideoMetaTransform :: Maybe VideoMetaTransform

A convenience alias for Nothing :: Maybe VideoMetaTransform.

Methods

scaleGetQuark

videoMetaTransformScaleGetQuark

Arguments

:: (HasCallStack, MonadIO m)

=> m Word32

Returns: a GQuark

Get the GQuark for the "gst-video-scale" metadata transform operation.

Properties

inInfo

the input VideoInfo

clearVideoMetaTransformInInfo :: MonadIO m => VideoMetaTransform -> m ()

Set the value of the “in_info” field to Nothing. When overloading is enabled, this is equivalent to

clear #inInfo

getVideoMetaTransformInInfo :: MonadIO m => VideoMetaTransform -> m (Maybe VideoInfo)

Get the value of the “in_info” field. When overloading is enabled, this is equivalent to

get videoMetaTransform #inInfo

setVideoMetaTransformInInfo :: MonadIO m => VideoMetaTransform -> Ptr VideoInfo -> m ()

Set the value of the “in_info” field. When overloading is enabled, this is equivalent to

set videoMetaTransform [ #inInfo := value ]

outInfo

the output VideoInfo

clearVideoMetaTransformOutInfo :: MonadIO m => VideoMetaTransform -> m ()

Set the value of the “out_info” field to Nothing. When overloading is enabled, this is equivalent to

clear #outInfo

getVideoMetaTransformOutInfo :: MonadIO m => VideoMetaTransform -> m (Maybe VideoInfo)

Get the value of the “out_info” field. When overloading is enabled, this is equivalent to

get videoMetaTransform #outInfo

setVideoMetaTransformOutInfo :: MonadIO m => VideoMetaTransform -> Ptr VideoInfo -> m ()

Set the value of the “out_info” field. When overloading is enabled, this is equivalent to

set videoMetaTransform [ #outInfo := value ]