Synthesizer.ALSA.EventList

Documentation

getTimeSeconds :: C time => IO time

The time type needs high precision, so you will certainly have to instantiate it with Double. Float has definitely not enough bits.

clockTimeToSeconds :: C time => ClockTime -> time

wait :: C time => time -> IO ()

type StampedEvent time = (time, T)

getStampedEvent :: (C time, AllowInput mode) => T mode -> IO (StampedEvent time)

only use it for non-blocking sequencers

We ignore ALSA time stamps and use the time of fetching the event, because I don't know whether the ALSA time stamps are in sync with getClockTime.

getWaitingStampedEvents :: (C time, AllowInput mode) => T mode -> IO [StampedEvent time]

only use it for non-blocking sequencers

realTimeToField :: C a => T -> a

RealTime.toFractional for NumericPrelude.

addStamp :: C time => T -> StampedEvent time

getStampedEventsUntilTime :: (C time, AllowInput mode, AllowOutput mode) => T mode -> T -> T -> time -> IO [StampedEvent time]

only use it for blocking sequencers

getEventsUntilEcho :: AllowInput mode => T -> T mode -> IO [T]

The client id may differ from the receiving sequencer. I do not know, whether there are circumstances, where this is useful.

getEventsUntilTime :: (C time, AllowInput mode, AllowOutput mode) => T mode -> T -> T -> time -> IO [T]

Get events until a certain point in time. It sends itself an Echo event in order to measure time.

getWaitingEvents :: AllowInput mode => T mode -> IO [T]

type StrictTime = Integer

newtype ClientName

Constructors

ClientName String

Instances

Show ClientName

withMIDIEvents :: C time => ClientName -> time -> time -> (T StrictTime [T] -> IO a) -> IO a

withMIDIEventsNonblockWaitGrouped :: C time => ClientName -> time -> time -> (T StrictTime [T] -> IO a) -> IO a

withMIDIEventsNonblockWaitDefer :: C time => ClientName -> time -> time -> (T StrictTime (Maybe T) -> IO a) -> IO a

withMIDIEventsNonblockWaitSkip :: C time => ClientName -> time -> time -> (T StrictTime (Maybe T) -> IO a) -> IO a

withMIDIEventsNonblockWaitMin :: C time => ClientName -> time -> time -> (T StrictTime (Maybe T) -> IO a) -> IO a

withMIDIEventsNonblockConstantPause :: C time => ClientName -> time -> time -> (T StrictTime (Maybe T) -> IO a) -> IO a

withMIDIEventsNonblockSimple :: C time => ClientName -> time -> time -> (T StrictTime T -> IO a) -> IO a

setTimestamping :: T mode -> T -> T -> IO ()

withMIDIEventsBlockEcho :: C time => ClientName -> time -> time -> (T StrictTime [T] -> IO a) -> IO a

withMIDIEventsBlockEchoQuantised :: C time => ClientName -> time -> time -> (T StrictTime [T] -> IO a) -> IO a

This is like withMIDIEventsBlockEcho but collects all events at the beginning of the beats. This way, further processing steps may collapse all controller events within one beat to one event.

withMIDIEventsChunked :: C time => ClientName -> time -> time -> ([IO (T StrictTime [T])] -> IO a) -> IO a

Make sure, that beat is an integer multiple of recip rate. Since we round time within each chunk, we would otherwise accumulate rounding errors over time.

withMIDIEventsChunkedQuantised :: C time => ClientName -> time -> time -> ([IO (T StrictTime [T])] -> IO a) -> IO a

makeEcho :: C time => T -> T -> T -> time -> Custom -> T

withMIDIEventsBlock :: C time => ClientName -> time -> (T StrictTime T -> IO a) -> IO a

withInPort :: ClientName -> BlockMode -> (T DuplexMode -> T -> IO t) -> IO t

discretizeTime :: C time => time -> T time a -> T StrictTime a

We first discretize the absolute time values, then we compute differences, in order to avoid rounding errors in further computations.

ioToLazyList :: IO a -> IO [a]

lazySequence :: [IO a] -> IO [a]