Copyright	(c) Henning Thielemann 2010-2012 (c) Iavor S. Diatchki 2007
License	BSD3
Maintainer	Henning Thielemann
Stability	provisional
Safe Haskell	None
Language	Haskell2010

Sound.ALSA.Sequencer.Queue

Contents

General Queue Functions

Description

This module contains functions for working with sequencer queue. Reference: http://www.alsa-project.org/alsa-doc/alsa-lib/group___seq_queue.html

Synopsis

General Queue Functions

data T Source #

The type of queue identifiers.

Instances

Eq T Source #
Methods (==) :: T -> T -> Bool # (/=) :: T -> T -> Bool #
Ord T Source #
Methods compare :: T -> T -> Ordering # (<) :: T -> T -> Bool # (<=) :: T -> T -> Bool # (>) :: T -> T -> Bool # (>=) :: T -> T -> Bool # max :: T -> T -> T # min :: T -> T -> T #
Show T Source #
Methods showsPrec :: Int -> T -> ShowS # show :: T -> String # showList :: [T] -> ShowS #
Storable T Source #
Methods sizeOf :: T -> Int # alignment :: T -> Int # peekElemOff :: Ptr T -> Int -> IO T # pokeElemOff :: Ptr T -> Int -> T -> IO () # peekByteOff :: Ptr b -> Int -> IO T # pokeByteOff :: Ptr b -> Int -> T -> IO () # peek :: Ptr T -> IO T # poke :: Ptr T -> T -> IO () #

direct :: T Source #

alloc Source #

Arguments

:: T mode
-> IO T	Queue.T identifier.

allocNamed :: T mode -> String -> IO T Source #

free Source #

Arguments

:: T mode	Sequencer handle.
-> T	Queue.T identifier.
-> IO ()

Delete the specified queue.

with :: T mode -> (T -> IO a) -> IO a Source #

withNamed :: T mode -> String -> (T -> IO a) -> IO a Source #

control Source #

Arguments

:: T mode	Sequencer handle.
-> T	target Queue.T.
-> QueueEv
-> Maybe T	prototype event that may provide timestamp, source queue
-> IO ()

startstopcontinue a queue

In the prototype event you can provide additional information. The prototype event does not need to be a queue control event, this part is ignored anyway. In the prototype event you may also specify a queue. This is the queue that the timestamp of the prototype event refers to. This way you can control the target queue using timing from another queue.