GI.Gst.Structs.ParentBufferMeta

The ParentBufferMeta is a Meta which can be attached to a Buffer to hold a reference to another buffer that is only released when the child Buffer is released.

Typically, ParentBufferMeta is used when the child buffer is directly using the Memory of the parent buffer, and wants to prevent the parent buffer from being returned to a buffer pool until the Memory is available for re-use.

Since: 1.6

Exported types

newtype ParentBufferMeta

Memory-managed wrapper type.

Constructors

ParentBufferMeta (ManagedPtr ParentBufferMeta)

Instances

WrappedPtr ParentBufferMeta

Defined in GI.Gst.Structs.ParentBufferMeta

Methods

wrappedPtrCalloc :: IO (Ptr ParentBufferMeta)

wrappedPtrCopy :: ParentBufferMeta -> IO ParentBufferMeta

wrappedPtrFree :: Maybe (GDestroyNotify ParentBufferMeta)

tag ~ AttrSet => Constructible ParentBufferMeta tag

Defined in GI.Gst.Structs.ParentBufferMeta

Methods

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

newZeroParentBufferMeta :: MonadIO m => m ParentBufferMeta

Construct a ParentBufferMeta struct initialized to zero.

noParentBufferMeta :: Maybe ParentBufferMeta

A convenience alias for Nothing :: Maybe ParentBufferMeta.

Methods

getInfo

parentBufferMetaGetInfo

Arguments

:: (HasCallStack, MonadIO m)

=> m MetaInfo

Returns: The MetaInfo

Get the global MetaInfo describing the ParentBufferMeta meta.

Since: 1.6

Properties

buffer

the Buffer on which a reference is being held.

clearParentBufferMetaBuffer :: MonadIO m => ParentBufferMeta -> m ()

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

clear #buffer

getParentBufferMetaBuffer :: MonadIO m => ParentBufferMeta -> m (Maybe Buffer)

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

get parentBufferMeta #buffer

setParentBufferMetaBuffer :: MonadIO m => ParentBufferMeta -> Ptr Buffer -> m ()

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

set parentBufferMeta [ #buffer := value ]

parent

the parent Meta structure

getParentBufferMetaParent :: MonadIO m => ParentBufferMeta -> m Meta

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

get parentBufferMeta #parent