--------------------------------------------------------------------------------
-- |
-- Module    : Sound.ALSA.Sequencer.Queue.Timer
-- Copyright : (c) Henning Thielemann, 2010
--             (c) Iavor S. Diatchki, 2007
-- License   : BSD3
--
-- Maintainer: Henning Thielemann
-- Stability : provisional
--
-- This module contains functions for working with sequencer queue.
-- Reference:
-- <http://www.alsa-project.org/alsa-doc/alsa-lib/group___seq_queue.html>
--------------------------------------------------------------------------------

module Sound.ALSA.Sequencer.Queue.Timer
  ( T
  , get
  , set
  , copy
  , clone

  , getQueue
  , getType
  , getResolution

  , setType
  , setResolution

  , QueueTimer.Type(..)
  ) where

import qualified Sound.ALSA.Sequencer.Marshal.Queue as Queue
import qualified Sound.ALSA.Sequencer.Marshal.QueueTimer as QueueTimer
import qualified Sound.ALSA.Sequencer.Marshal.Sequencer as Seq
import qualified Sound.ALSA.Sequencer.Area as Area
import qualified Sound.ALSA.Exception as Exc

import Foreign.Ptr (Ptr, )
import Foreign.C.Types (CInt, )
import Data.Word (Word, )


type T = Area.QueueTimer
type T_ = Area.QueueTimer_

get :: Seq.T mode -> Queue.T -> IO T
get (Seq.Cons h) q =
  do timer <- Area.queue_timer_malloc
     Exc.checkResult "get_queue_timer" =<< Area.with_queue_timer timer
                                     (snd_seq_get_queue_timer h (Queue.exp q))
     return timer

foreign import ccall "alsa/asoundlib.h snd_seq_get_queue_timer"
  snd_seq_get_queue_timer :: Ptr Seq.Core -> CInt -> Ptr T_ -> IO CInt


set :: Seq.T mode -> Queue.T -> T -> IO ()
set (Seq.Cons h) p timer =
  Exc.checkResult_ "set_queue_timer" =<< Area.with_queue_timer timer (snd_seq_set_queue_timer h (Queue.exp p))

foreign import ccall "alsa/asoundlib.h snd_seq_set_queue_timer"
  snd_seq_set_queue_timer :: Ptr Seq.Core -> CInt -> Ptr T_ -> IO CInt


copy :: T -> T -> IO ()
clone :: T -> IO T
getQueue :: T -> IO Queue.T
getType :: T -> IO QueueTimer.Type
getResolution :: T -> IO Word
setType :: T -> QueueTimer.Type -> IO ()
setResolution :: T -> Word -> IO ()

copy          = Area.queue_timer_copy
clone         = Area.queue_timer_clone
getQueue      = Area.queue_timer_get_queue
getType       = Area.queue_timer_get_type
getResolution = Area.queue_timer_get_resolution
setType       = Area.queue_timer_set_type
setResolution = Area.queue_timer_set_resolution