--  GIMP Toolkit (GTK) Binding for Haskell: binding to gstreamer -*-haskell-*-
--
--  Author : Peter Gavin
--  Created: 1-Apr-2007
--
--  Copyright (c) 2007 Peter Gavin
--
--  This library is free software: you can redistribute it and/or
--  modify it under the terms of the GNU Lesser General Public License
--  as published by the Free Software Foundation, either version 3 of
--  the License, or (at your option) any later version.
--  
--  This library is distributed in the hope that it will be useful,
--  but WITHOUT ANY WARRANTY; without even the implied warranty of
--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
--  Lesser General Public License for more details.
--  
--  You should have received a copy of the GNU Lesser General Public
--  License along with this program.  If not, see
--  <http://www.gnu.org/licenses/>.
--  
--  GStreamer, the C library which this Haskell library depends on, is
--  available under LGPL Version 2. The documentation included with
--  this library is based on the original GStreamer documentation.
--  
-- | Maintainer  : gtk2hs-devel@lists.sourceforge.net
--   Stability   : alpha
--   Portability : portable (depends on GHC)
module Media.Streaming.GStreamer.Core.PluginFeature (
  
  PluginFeature,
  PluginFeatureClass,
  castToPluginFeature,
  gTypePluginFeature,

  pluginFeatureLoad,
  pluginFeatureCheckVersion
  
  ) where

import Control.Monad (liftM)
{#import Media.Streaming.GStreamer.Core.Types#}
import System.Glib.FFI
import System.Glib.GObject

{# context lib = "gstreamer" prefix = "gst" #}

pluginFeatureLoad :: PluginFeatureClass pluginFeature
                  => pluginFeature
                  -> IO pluginFeature
pluginFeatureLoad pluginFeature =
    liftM (unsafeCastGObject . toGObject) $
        {# call plugin_feature_load #} (toPluginFeature pluginFeature) >>=
            takeObject

pluginFeatureCheckVersion :: PluginFeatureClass pluginFeature
                          => pluginFeature
                          -> Word
                          -> Word
                          -> Word
                          -> IO Bool
pluginFeatureCheckVersion pluginFeature minMajor minMinor minMicro =
    liftM toBool $
        {# call plugin_feature_check_version #} (toPluginFeature pluginFeature)
                                                (fromIntegral minMajor)
                                                (fromIntegral minMinor)
                                                (fromIntegral minMicro)