Sound.ALSA.Sequencer.Queue

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

General Queue Functions

data T

The type of queue identifiers.

Instances

Eq T

Methods

(==) :: T -> T -> Bool

(/=) :: T -> T -> Bool

Ord T

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

Methods

showsPrec :: Int -> T -> ShowS

show :: T -> String

showList :: [T] -> ShowS

Storable T

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

alloc

Arguments

:: T mode

-> IO T

Queue.T identifier.

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

free

Arguments

:: T mode

Sequencer handle.

-> T

Queue.T identifier.

-> IO ()

Delete the specified queue.

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

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

control

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.