alsa-midi-0.3.1: Bindings for the ALSA sequencer API (MIDI stuff) Contents Index

Sound.ALSA.Sequencer

Synopsis

isNoteOn :: Event -> Bool isNoteOff :: Event -> Bool createClient :: OpenMode -> String -> IO Client deleteClient :: Client -> IO () createInputPort :: Client -> String -> IO Port createOutputPort :: Client -> String -> IO Port withMIDIEvents :: String -> String -> ([Event] -> IO a) -> IO a receiveMIDIEvent :: Client -> IO (Maybe Event) sendPlainEvent :: Client -> Event -> IO () drainOutput :: Client -> IO () initQueueTempo :: Client -> Queue -> Int -> Int -> IO () withNamedQueue :: Client -> String -> (Queue -> IO a) -> IO a portAddress :: Client -> Port -> Address numAddress :: Integer -> Integer -> Address numAddressEither :: Integer -> Integer -> Either String Address data Client newtype Port = Port CUInt eventFromMIDIEvent :: Queue -> Event -> (EventType, EventDataUnion)

Documentation

isNoteOn :: Event -> Bool

isNoteOff :: Event -> Bool

createClient :: OpenMode -> String -> IO Client

deleteClient :: Client -> IO ()

createInputPort :: Client -> String -> IO Port

createOutputPort :: Client -> String -> IO Port

withMIDIEvents :: String -> String -> ([Event] -> IO a) -> IO a

Process MIDI events from ALSA in a lazy manner. The processing function must be strict, in order to let the cleanup take place after abandoning the process.

receiveMIDIEvent :: Client -> IO (Maybe Event)

sendPlainEvent :: Client -> Event -> IO ()

drainOutput :: Client -> IO ()

Strangly ALSA returns error code 2 (No such file or directory) if the destination port does not exist.

initQueueTempo :: Client -> Queue -> Int -> Int -> IO ()

withNamedQueue :: Client -> String -> (Queue -> IO a) -> IO a

portAddress :: Client -> Port -> Address

numAddress :: Integer -> Integer -> Address

numAddressEither :: Integer -> Integer -> Either String Address

data Client

newtype Port

Constructors Port CUInt Instances Enum Port Eq Port Show Port Storable Port

eventFromMIDIEvent :: Queue -> Event -> (EventType, EventDataUnion)

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