1 files changed, 19 insertions, 4 deletions

diff --git a/src/Trivmix.hs b/src/Trivmix.hs
index f7ae1eb..a139a15 100644
--- a/src/Trivmix.hs
+++ b/src/Trivmix.hs
@@ -18,6 +18,7 @@ import Control.Concurrent
 import Control.Concurrent.MVar
 
 import qualified Control.Monad.Trans.Class as Trans
+import qualified Control.Monad.Exception.Synchronous as Sync
 
 import Control.Exception
 import System.IO.Error
@@ -28,6 +29,8 @@ data Options = Options
                { input :: String
                , output :: String
                , client :: String
+               , connFrom :: Maybe String
+               , connTo :: Maybe String
                , initialLevel :: Float
                , stateDir :: FilePath
                }
@@ -43,6 +46,12 @@ optionParser = Options <$>
                <*> strOption ( long "client"
                                <> metavar "STRING"
                              )
+               <*> optional (strOption ( long "input-from"
+                                         <> metavar "STRING"
+                                       ))
+               <*> optional (strOption ( long "output-to"
+                                         <> metavar "STRING"
+                                       ))
                <*> (fromMaybe 0 <$> optional (option auto ( long "level"
                                                             <> metavar "FLOAT"
                                                           )
@@ -71,10 +80,16 @@ trivmix Options{..} = do
     Jack.handleExceptions $
       Jack.withClientDefault client $ \client ->
       Jack.withPort client input $ \input' ->
-      Jack.withPort client output $ \output' ->
-      Audio.withProcessMono client input' (mix level) output' $
-      Jack.withActivation client $ Trans.lift $ do
-        Jack.waitForBreak
+      Jack.withPort client output $ \output' -> do
+        case connFrom of
+          Nothing -> return ()
+          Just f -> Jack.connect client input f
+        case connTo of
+          Nothing -> return ()
+          Just t -> Jack.connect client t output
+        Audio.withProcessMono client input' (mix level) output' $
+          Jack.withActivation client $ Trans.lift $ do
+            Jack.waitForBreak
   
 mix :: MVar Float -> CFloat -> IO CFloat
 mix level input = do