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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.Segment (
Segment(..),
segmentClip,
segmentSetDuration,
segmentSetLastStop,
segmentSetNewsegment,
segmentSetSeek,
segmentToRunningTime,
segmentToStreamTime
) where
{# context lib = "gstreamer" prefix = "gst" #}
import Control.Monad (liftM)
import System.Glib.FFI
import System.Glib.Flags
{#import Media.Streaming.GStreamer.Core.Types#}
segmentClip :: Segment
-> Format
-> Int64
-> Int64
-> (Segment, Bool, Int64, Int64)
segmentClip segment format start stop =
unsafePerformIO $ alloca $ \clipStartPtr ->
alloca $ \clipStopPtr ->
with segment $ \segmentPtr ->
do result <- liftM toBool $
{# call segment_clip #} (castPtr segmentPtr)
(fromIntegral $ fromFormat format)
(fromIntegral start)
(fromIntegral stop)
clipStartPtr
clipStopPtr
segment' <- peek segmentPtr
clipStart <- liftM fromIntegral $ peek clipStartPtr
clipStop <- liftM fromIntegral $ peek clipStopPtr
return (segment', result, clipStart, clipStop)
segmentSetDuration :: Segment
-> Format
-> Int64
-> Segment
segmentSetDuration segment format duration =
unsafePerformIO $ with segment $ \segmentPtr ->
do {# call segment_set_duration #} (castPtr segmentPtr)
(fromIntegral $ fromFormat format)
(fromIntegral duration)
peek segmentPtr
segmentSetLastStop :: Segment
-> Format
-> Int64
-> Segment
segmentSetLastStop segment format position =
unsafePerformIO $ with segment $ \segmentPtr ->
do {# call segment_set_last_stop #} (castPtr segmentPtr)
(fromIntegral $ fromFormat format)
(fromIntegral position)
peek segmentPtr
segmentSetNewsegment :: Segment
-> Bool
-> Double
-> Format
-> Int64
-> Int64
-> Int64
-> Segment
segmentSetNewsegment segment update rate format start stop time =
unsafePerformIO $ with segment $ \segmentPtr ->
do {# call segment_set_newsegment #} (castPtr segmentPtr)
(fromBool update)
(realToFrac rate)
(fromIntegral $ fromFormat format)
(fromIntegral start)
(fromIntegral stop)
(fromIntegral time)
peek segmentPtr
segmentSetSeek :: Segment
-> Double
-> Format
-> [SeekFlags]
-> SeekType
-> Int64
-> SeekType
-> Int64
-> (Segment, Bool)
segmentSetSeek segment rate format flags startType start stopType stop =
unsafePerformIO $ with segment $ \segmentPtr ->
alloca $ \updatePtr ->
do {# call segment_set_seek #} (castPtr segmentPtr)
(realToFrac rate)
(fromIntegral $ fromFormat format)
(fromIntegral $ fromFlags flags)
(cFromEnum startType)
(fromIntegral start)
(cFromEnum stopType)
(fromIntegral stop)
updatePtr
update <- liftM toBool $ peek updatePtr
segment' <- peek segmentPtr
return (segment', update)
segmentToRunningTime :: Segment
-> Format
-> Int64
-> Int64
segmentToRunningTime segment format position =
fromIntegral $ unsafePerformIO $ with segment $ \segmentPtr ->
{# call segment_to_running_time #} (castPtr segmentPtr)
(fromIntegral $ fromFormat format)
(fromIntegral position)
segmentToStreamTime :: Segment
-> Format
-> Int64
-> Int64
segmentToStreamTime segment format position =
fromIntegral $ unsafePerformIO $ with segment $ \segmentPtr ->
{# call segment_to_stream_time #} (castPtr segmentPtr)
(fromIntegral $ fromFormat format)
(fromIntegral position)
|
