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

Extra buffer metadata describing an image region of interest
-}

module GI.GstVideo.Structs.VideoRegionOfInterestMeta
    ( 

-- * Exported types
    VideoRegionOfInterestMeta(..)           ,
    newZeroVideoRegionOfInterestMeta        ,
    noVideoRegionOfInterestMeta             ,


 -- * Methods
-- ** videoRegionOfInterestMetaGetInfo
    videoRegionOfInterestMetaGetInfo        ,




 -- * Properties
-- ** H
    videoRegionOfInterestMetaReadH          ,


-- ** Id
    videoRegionOfInterestMetaReadId         ,


-- ** Meta
    videoRegionOfInterestMetaReadMeta       ,


-- ** ParentId
    videoRegionOfInterestMetaReadParentId   ,


-- ** RoiType
    videoRegionOfInterestMetaReadRoiType    ,


-- ** W
    videoRegionOfInterestMetaReadW          ,


-- ** X
    videoRegionOfInterestMetaReadX          ,


-- ** Y
    videoRegionOfInterestMetaReadY          ,




    ) 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 VideoRegionOfInterestMeta = VideoRegionOfInterestMeta (ForeignPtr VideoRegionOfInterestMeta)
-- | Construct a `VideoRegionOfInterestMeta` struct initialized to zero.
newZeroVideoRegionOfInterestMeta :: MonadIO m => m VideoRegionOfInterestMeta
newZeroVideoRegionOfInterestMeta = liftIO $ callocBytes 48 >>= wrapPtr VideoRegionOfInterestMeta

noVideoRegionOfInterestMeta :: Maybe VideoRegionOfInterestMeta
noVideoRegionOfInterestMeta = Nothing

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

videoRegionOfInterestMetaReadRoiType :: VideoRegionOfInterestMeta -> IO Word32
videoRegionOfInterestMetaReadRoiType s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 16) :: IO Word32
    return val

videoRegionOfInterestMetaReadId :: VideoRegionOfInterestMeta -> IO Int32
videoRegionOfInterestMetaReadId s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 20) :: IO Int32
    return val

videoRegionOfInterestMetaReadParentId :: VideoRegionOfInterestMeta -> IO Int32
videoRegionOfInterestMetaReadParentId s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 24) :: IO Int32
    return val

videoRegionOfInterestMetaReadX :: VideoRegionOfInterestMeta -> IO Word32
videoRegionOfInterestMetaReadX s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 28) :: IO Word32
    return val

videoRegionOfInterestMetaReadY :: VideoRegionOfInterestMeta -> IO Word32
videoRegionOfInterestMetaReadY s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 32) :: IO Word32
    return val

videoRegionOfInterestMetaReadW :: VideoRegionOfInterestMeta -> IO Word32
videoRegionOfInterestMetaReadW s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 36) :: IO Word32
    return val

videoRegionOfInterestMetaReadH :: VideoRegionOfInterestMeta -> IO Word32
videoRegionOfInterestMetaReadH s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 40) :: IO Word32
    return val

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

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


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

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

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

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