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import qualified Sound.ALSA.Sequencer.Client as Client
import qualified Sound.ALSA.Sequencer.Port as Port
import qualified Sound.ALSA.Sequencer.Event as Event
import qualified Sound.ALSA.Sequencer as SndSeq
import qualified Sound.ALSA.Exception as AlsaExc
import Control.Monad (forever, )
import qualified Sound.ALSA.Sequencer.Client.Info as ClientInfo
import qualified Sound.ALSA.Sequencer.Port.Info as PortInfo
import qualified Sound.ALSA.Sequencer.Port as Port
import qualified Data.EnumSet as EnumSet
import Text.Printf (printf, )
import Control.Monad (liftM5, liftM2, join, when, filterM, forM_)
import Sound.ALSA.Sequencer.Connect as AlsaConn
import qualified Sound.ALSA.Sequencer.Address as Addr
listPorts :: IO ()
listPorts = do
putStrLn " Port Client name Port name Caps"
SndSeq.withDefault SndSeq.Block $ \h ->
ClientInfo.queryLoop_ (h :: SndSeq.T SndSeq.OutputMode) $ \cinfo -> do
client <- ClientInfo.getClient cinfo
PortInfo.queryLoop_ h client $ \pinfo -> do
join $ liftM5 (\a b c d e -> when (c == "AXIS-49 2A") $ printf "%3d:%-3d %-32.32s %-24.24s %s\n" a b c d e)
(fmap (\(Client.Cons p) -> p) $ PortInfo.getClient pinfo)
(fmap (\(Port.Cons p) -> p) $ PortInfo.getPort pinfo)
(ClientInfo.getName cinfo)
(PortInfo.getName pinfo)
(do
caps <- PortInfo.getCapability pinfo
let disp (cap, char) =
if EnumSet.disjoint caps cap then ' ' else char
return $ map disp $
(Port.capRead, 'r') :
(Port.capSubsRead, 'R') :
(Port.capWrite, 'w') :
(Port.capSubsWrite, 'W') :
[])
findPort wantName f = do
SndSeq.withDefault SndSeq.Block $ \h ->
ClientInfo.queryLoop_ (h :: SndSeq.T SndSeq.OutputMode) $ \cinfo -> do
name <- (ClientInfo.getName cinfo)
when (name == wantName) $ do
client <- ClientInfo.getClient cinfo
PortInfo.queryLoop_ h client $ \pinfo -> do
port <- (fmap (\(Client.Cons p) -> p) $ PortInfo.getClient pinfo)
f $ show port
main :: IO ()
main = (do
--outport <- findPort "AXIS-49 2A" return -- nope
--outport <- findPort "AXIS-49 2A" (\p -> return p) -- nope
putStrLn "Starting."
SndSeq.withDefault SndSeq.Nonblock $ \h -> do
Client.setName (h :: SndSeq.T SndSeq.InputMode) "Axis-of-Eval"
putStrLn "Created sequencer."
Port.withSimple h "primary"
(Port.caps [Port.capWrite, Port.capSubsWrite]) Port.typeMidiGeneric $ \ _p1 -> do
Port.withSimple h "secondary"
(Port.caps [Port.capWrite, Port.capSubsWrite]) Port.typeMidiGeneric $ \ _p2 -> do
putStrLn "Created ports."
clientID <- Client.getId h
findPort "AXIS-49 2A" (connectAxis h clientID _p1)
forever $ do
putStrLn "waiting for an event:"
print =<< Event.input h)
`AlsaExc.catch` \e ->
putStrLn $ "alsa_exception: " ++ AlsaExc.show e
connectAxis h myID myPort axisID = do
myID_int <- (\(Client.Cons p) -> return p) myID
printf "Found my ID: %d.\nFound Axis ID: %s.\n" myID_int axisID
AlsaConn.createFrom h myPort =<< Addr.parse h (axisID ++ ":0")
return ()
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