{-# LANGUAGE ScopedTypeVariables #-} module Sound.Tidal.EspGrid (tidalEspGridLink,cpsEsp) where import Control.Concurrent.MVar import Control.Concurrent (forkIO,threadDelay) import Control.Monad (forever) import Sound.OSC.FD import Sound.Tidal.Tempo parseEspTempo :: [Datum] -> Maybe (Tempo -> Tempo) parseEspTempo d = do on :: Integer <- datum_integral (d!!0) bpm <- datum_floating (d!!1) t1 :: Integer <- datum_integral (d!!2) t2 <- datum_integral (d!!3) n :: Integer <- datum_integral (d!!4) let nanos = (t1*1000000000) + t2 return $ \t -> t { atTime = ((realToFrac nanos)/1000000000), atCycle = fromIntegral n, cps = bpm/60, paused = on == 0 } changeTempo :: MVar Tempo -> Packet -> IO () changeTempo t (Packet_Message msg) = do case parseEspTempo (messageDatum msg) of Just f -> takeMVar t >>= (\x -> putMVar t (f x)) Nothing -> putStrLn "Warning: Unable to parse message (likely from EspGrid) as Tempo" changeTempo _ _ = putStrLn "Serious error: Can only process Packet_Message" tidalEspGridLink :: MVar Tempo -> IO () tidalEspGridLink t = do socket <- openUDP "127.0.0.1" 5510 _ <- forkIO $ forever $ do _ <- sendMessage socket $ Message "/esp/tempo/q" [] response <- waitAddress socket "/esp/tempo/r" changeTempo t response threadDelay 200000 return () cpsEsp :: Real t => t -> IO () cpsEsp t = do socket <- openUDP "127.0.0.1" 5510 sendMessage socket $ Message "/esp/beat/tempo" [float (t*60)]