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|
-- 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.Parse (
parseLaunch,
parseLaunchFromArgs,
parseBinFromDescription
) where
{#import Media.Streaming.GStreamer.Core.Types#}
import System.Glib.GError
import System.Glib.UTFString
import System.Glib.FFI
{# context lib = "gstreamer" prefix = "gst" #}
parseLaunch :: String
-> IO (Maybe Element, Maybe GError)
parseLaunch pipelineDescription =
withUTFString pipelineDescription $ \cPipelineDescription ->
alloca $ \gErrorPtr ->
do element <- {# call parse_launch #} cPipelineDescription (castPtr gErrorPtr) >>=
maybePeek takeObject
gError <- peek gErrorPtr >>= maybePeek peek
return (element, gError)
parseLaunchFromArgs :: [String]
-> IO (Maybe Element, Maybe GError)
parseLaunchFromArgs args =
withUTFStringArray0 args $ \cArgs ->
alloca $ \gErrorPtr ->
do element <- {# call parse_launchv #} (castPtr cArgs) (castPtr gErrorPtr) >>=
maybePeek takeObject
gError <- peek gErrorPtr >>= maybePeek peek
return (element, gError)
parseBinFromDescription :: String
-> Bool
-> IO (Maybe Element, Maybe GError)
parseBinFromDescription binDescription ghostUnconnectedPads =
withUTFString binDescription $ \cBinDescription ->
alloca $ \gErrorPtr ->
do element <- {# call parse_bin_from_description #} cBinDescription
(fromBool ghostUnconnectedPads)
(castPtr gErrorPtr) >>=
maybePeek takeObject
gError <- peek gErrorPtr >>= maybePeek peek
return (element, gError)
|
