-- | Type-safe bindings to EsounD with monadic regions.
module Sound.EsounD
- ( Frame
-
- , Channels
- , Mono
- , Stereo
-
- , Player
- , openPlayer
+ ( module Sound.EsounD.Types
+ , module Sound.EsounD.Player
)
where
-import Bindings.EsounD
-import Control.Monad.IO.Class
-import Control.Monad.Trans.Region
-import Control.Monad.Trans.Region.OnExit
-import Control.Monad.Unicode
-import Data.Bits
-import Data.Int
-import Foreign.C.String
-import Network
-import Prelude.Unicode
-import Sound.EsounD.Internals
-import System.IO
-import System.IO.SaferFileHandles.Unsafe
-
-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
-
-
--- ^ An ESD handle for playing a stream.
-data Player fr ch (r ∷ * → *)
- = Player {
- plRate ∷ !Int
- -- THINKME: We really want to use RegionalFileHandle but we
- -- can't, because safer-file-handles currently provides no ways
- -- to wrap ordinary handles.
- , plHandle ∷ !Handle
- , plCloseH ∷ !(CloseHandle r)
- }
-
-instance Dup (Player fr ch) where
- dup pl = do ch' ← dup (plCloseH pl)
- return pl { plCloseH = ch' }
-
--- | Open an ESD handle for playing a stream.
-openPlayer ∷ ∀fr ch s pr.
- ( Frame fr
- , Channels ch
- , MonadIO pr
- )
- ⇒ Int -- ^ sample rate for the stream.
- → HostName -- ^ host to connect to.
- → Maybe String -- ^ name used to identify this stream to
- -- ESD (if any).
- → RegionT s pr (Player fr ch (RegionT s pr))
-openPlayer rate host name
- = do h ← liftIO openSocket
- ch ← onExit $ sanitizeIOError $ closeSocket h
- return Player {
- plRate = rate
- , plHandle = h
- , plCloseH = ch
- }
- where
- fmt :: C'esd_format_t
- fmt = frameFmt ((⊥) ∷ fr) .&.
- channelFmt ((⊥) ∷ ch) .&.
- c'ESD_STREAM .&.
- c'ESD_PLAY
-
- openSocket :: IO Handle
- openSocket = withCString host $ \hostPtr →
- withCStrOrNull name $ \namePtr →
- c'esd_play_stream
- fmt
- (fromIntegral rate)
- hostPtr
- namePtr
- ≫= wrapSocket "esd_play_stream() returned an error"
+import Sound.EsounD.Types
+import Sound.EsounD.Player