alsa-midi-0.3.2: Bindings for the ALSA sequencer API (MIDI stuff) Source code Contents Index

Sound.ALSA.Sequencer

Synopsis

data Event = MIDIEvent Channel T | MetaEvent MetaEvent | SysExStart ByteString | SysExCont ByteString 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

data Event Source

Constructors MIDIEvent Channel T MetaEvent MetaEvent SysExStart ByteString SysExCont ByteString Instances Eq Event Ord Event Show Event

isNoteOn :: Event -> Bool Source

isNoteOff :: Event -> Bool Source

createClient :: OpenMode -> String -> IO Client Source

deleteClient :: Client -> IO () Source

createInputPort :: Client -> String -> IO Port Source

createOutputPort :: Client -> String -> IO Port Source

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

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) Source

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

drainOutput :: Client -> IO () Source

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

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

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

portAddress :: Client -> Port -> Address Source

numAddress :: Integer -> Integer -> Address Source

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

data Client Source

newtype Port Source

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

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

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