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

Structure representing the state of an incoming or outgoing video
stream for encoders and decoders.

Decoders and encoders will receive such a state through their
respective @set_format vmethods.

Decoders and encoders can set the downstream state, by using the
@gst_video_decoder_set_output_state() or
@gst_video_encoder_set_output_state() methods.
-}

module GI.GstVideo.Structs.VideoCodecState
    ( 

-- * Exported types
    VideoCodecState(..)                     ,
    newZeroVideoCodecState                  ,
    noVideoCodecState                       ,


 -- * Methods
-- ** videoCodecStateRef
    VideoCodecStateRefMethodInfo            ,
    videoCodecStateRef                      ,


-- ** videoCodecStateUnref
    VideoCodecStateUnrefMethodInfo          ,
    videoCodecStateUnref                    ,




 -- * Properties
-- ** Caps
    videoCodecStateReadCaps                 ,


-- ** CodecData
    videoCodecStateReadCodecData            ,


-- ** Info
    videoCodecStateReadInfo                 ,




    ) 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 VideoCodecState = VideoCodecState (ForeignPtr VideoCodecState)
foreign import ccall "gst_video_codec_state_get_type" c_gst_video_codec_state_get_type :: 
    IO GType

instance BoxedObject VideoCodecState where
    boxedType _ = c_gst_video_codec_state_get_type

-- | Construct a `VideoCodecState` struct initialized to zero.
newZeroVideoCodecState :: MonadIO m => m VideoCodecState
newZeroVideoCodecState = liftIO $ callocBoxedBytes 304 >>= wrapBoxed VideoCodecState

noVideoCodecState :: Maybe VideoCodecState
noVideoCodecState = Nothing

videoCodecStateReadInfo :: VideoCodecState -> IO VideoInfo
videoCodecStateReadInfo s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 8) :: IO (Ptr VideoInfo)
    val' <- (newBoxed VideoInfo) val
    return val'

videoCodecStateReadCaps :: VideoCodecState -> IO Gst.Caps
videoCodecStateReadCaps s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 128) :: IO (Ptr Gst.Caps)
    val' <- (newBoxed Gst.Caps) val
    return val'

videoCodecStateReadCodecData :: VideoCodecState -> IO Gst.Buffer
videoCodecStateReadCodecData s = withManagedPtr s $ \ptr -> do
    val <- peek (ptr `plusPtr` 136) :: IO (Ptr Gst.Buffer)
    val' <- (newBoxed Gst.Buffer) val
    return val'

-- method VideoCodecState::ref
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "_obj", argType = TInterface "GstVideo" "VideoCodecState", direction = DirectionIn, mayBeNull = False, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : TInterface "GstVideo" "VideoCodecState"
-- throws : False
-- Skip return : False

foreign import ccall "gst_video_codec_state_ref" gst_video_codec_state_ref :: 
    Ptr VideoCodecState ->                  -- _obj : TInterface "GstVideo" "VideoCodecState"
    IO (Ptr VideoCodecState)


videoCodecStateRef ::
    (MonadIO m) =>
    VideoCodecState                         -- _obj
    -> m VideoCodecState                    -- result
videoCodecStateRef _obj = liftIO $ do
    let _obj' = unsafeManagedPtrGetPtr _obj
    result <- gst_video_codec_state_ref _obj'
    checkUnexpectedReturnNULL "gst_video_codec_state_ref" result
    result' <- (wrapBoxed VideoCodecState) result
    touchManagedPtr _obj
    return result'

data VideoCodecStateRefMethodInfo
instance (signature ~ (m VideoCodecState), MonadIO m) => MethodInfo VideoCodecStateRefMethodInfo VideoCodecState signature where
    overloadedMethod _ = videoCodecStateRef

-- method VideoCodecState::unref
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "_obj", argType = TInterface "GstVideo" "VideoCodecState", direction = DirectionIn, mayBeNull = False, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : TBasicType TVoid
-- throws : False
-- Skip return : False

foreign import ccall "gst_video_codec_state_unref" gst_video_codec_state_unref :: 
    Ptr VideoCodecState ->                  -- _obj : TInterface "GstVideo" "VideoCodecState"
    IO ()


videoCodecStateUnref ::
    (MonadIO m) =>
    VideoCodecState                         -- _obj
    -> m ()                                 -- result
videoCodecStateUnref _obj = liftIO $ do
    let _obj' = unsafeManagedPtrGetPtr _obj
    gst_video_codec_state_unref _obj'
    touchManagedPtr _obj
    return ()

data VideoCodecStateUnrefMethodInfo
instance (signature ~ (m ()), MonadIO m) => MethodInfo VideoCodecStateUnrefMethodInfo VideoCodecState signature where
    overloadedMethod _ = videoCodecStateUnref

type family ResolveVideoCodecStateMethod (t :: Symbol) (o :: *) :: * where
    ResolveVideoCodecStateMethod "ref" o = VideoCodecStateRefMethodInfo
    ResolveVideoCodecStateMethod "unref" o = VideoCodecStateUnrefMethodInfo
    ResolveVideoCodecStateMethod l o = MethodResolutionFailed l o

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

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