X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=EsounD.git;a=blobdiff_plain;f=Sound%2FEsounD%2FInternals.hs;h=f75f99a0dc1770777e9aa196505058a1854539f3;hp=987dd1e285262891ba79e69a6e985b0c0e7d0bb0;hb=d2396e7b6183bb033861069aaeb52be53a90bfdf;hpb=951367c7c17ddbc417a998fe9a19d6434f63f386

diff --git a/Sound/EsounD/Internals.hs b/Sound/EsounD/Internals.hs
index 987dd1e..f75f99a 100644
--- a/Sound/EsounD/Internals.hs
+++ b/Sound/EsounD/Internals.hs
@@ -1,11 +1,18 @@
 module Sound.EsounD.Internals
-    ( wrapSocket
+    ( Frame(..)
+
+    , Channels(..)
+    , Mono
+    , Stereo
+
+    , wrapSocket
     , closeSocket
     , withCStrOrNull
     )
     where
 
 import Bindings.EsounD
+import Data.Int
 import Foreign.C.String
 import Foreign.C.Types
 import Foreign.Ptr
@@ -13,6 +20,27 @@ import System.IO
 import System.Posix.IO
 import System.Posix.Types
 
+class Frame fr where
+    frameFmt ∷ fr → C'esd_format_t
+
+instance Frame Int8 where
+    frameFmt _ = c'ESD_BITS8
+
+instance Frame Int16 where
+    frameFmt _ = c'ESD_BITS16
+
+class Channels ch where
+    channelFmt ∷ ch → C'esd_format_t
+
+data Mono
+instance Channels Mono where
+    channelFmt _ = c'ESD_MONO
+
+data Stereo
+instance Channels Stereo where
+    channelFmt _ = c'ESD_STEREO
+
+
 wrapSocket :: String -> CInt → IO Handle
 wrapSocket e (-1) = fail e
 wrapSocket _ fd   = fdToHandle (Fd fd)