VideoOverlayCompositionMeta.hs


{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

Extra buffer metadata describing image overlay data.
-}

module GI.GstVideo.Structs.VideoOverlayCompositionMeta
    ( 

-- * Exported types
    VideoOverlayCompositionMeta(..)         ,
    newZeroVideoOverlayCompositionMeta      ,
    noVideoOverlayCompositionMeta           ,


 -- * Methods
-- ** videoOverlayCompositionMetaGetInfo
    videoOverlayCompositionMetaGetInfo      ,




 -- * Properties
-- ** Meta
    videoOverlayCompositionMetaReadMeta     ,


-- ** Overlay
    videoOverlayCompositionMetaReadOverlay  ,




    ) where

import Prelude ()
import Data.GI.Base.ShortPrelude

import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map

import GI.GstVideo.Types
import GI.GstVideo.Callbacks
import qualified GI.Gst as Gst

newtype VideoOverlayCompositionMeta = VideoOverlayCompositionMeta (ForeignPtr VideoOverlayCompositionMeta)
-- | Construct a `VideoOverlayCompositionMeta` struct initialized to zero.
newZeroVideoOverlayCompositionMeta :: MonadIO m => m VideoOverlayCompositionMeta
newZeroVideoOverlayCompositionMeta = liftIO $ callocBytes 24 >>= wrapPtr VideoOverlayCompositionMeta

noVideoOverlayCompositionMeta :: Maybe VideoOverlayCompositionMeta
noVideoOverlayCompositionMeta = Nothing

videoOverlayCompositionMetaReadMeta :: VideoOverlayCompositionMeta -> IO Gst.Meta
videoOverlayCompositionMetaReadMeta s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 0) :: IO (Ptr Gst.Meta)
    val' <- (newPtr 16 Gst.Meta) val
    return val'

videoOverlayCompositionMetaReadOverlay :: VideoOverlayCompositionMeta -> IO VideoOverlayComposition
videoOverlayCompositionMetaReadOverlay s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO (Ptr VideoOverlayComposition)
    val' <- (newBoxed VideoOverlayComposition) val
    return val'

-- method VideoOverlayCompositionMeta::get_info
-- method type : MemberFunction
-- Args : []
-- Lengths : []
-- returnType : TInterface "Gst" "MetaInfo"
-- throws : False
-- Skip return : False

foreign import ccall "gst_video_overlay_composition_meta_get_info" gst_video_overlay_composition_meta_get_info :: 
    IO (Ptr Gst.MetaInfo)


videoOverlayCompositionMetaGetInfo ::
    (MonadIO m) =>
    m Gst.MetaInfo                          -- result
videoOverlayCompositionMetaGetInfo  = liftIO $ do
    result <- gst_video_overlay_composition_meta_get_info
    checkUnexpectedReturnNULL "gst_video_overlay_composition_meta_get_info" result
    result' <- (newPtr 80 Gst.MetaInfo) result
    return result'

type family ResolveVideoOverlayCompositionMetaMethod (t :: Symbol) (o :: *) :: * where
    ResolveVideoOverlayCompositionMetaMethod l o = MethodResolutionFailed l o

instance (info ~ ResolveVideoOverlayCompositionMetaMethod t VideoOverlayCompositionMeta, MethodInfo info VideoOverlayCompositionMeta p) => IsLabelProxy t (VideoOverlayCompositionMeta -> p) where
    fromLabelProxy _ = overloadedMethod (MethodProxy :: MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveVideoOverlayCompositionMetaMethod t VideoOverlayCompositionMeta, MethodInfo info VideoOverlayCompositionMeta p) => IsLabel t (VideoOverlayCompositionMeta -> p) where
    fromLabel _ = overloadedMethod (MethodProxy :: MethodProxy info)
#endif