where
import Bindings.EsounD
-import Control.Monad.CatchIO
+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 System.IO.SaferFileHandles
+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
-- ^ An ESD handle for playing a stream.
data Player fr ch (r ∷ * → *)
= Player {
- plRate ∷ Int
- , plHandle ∷ RegionalFileHandle WriteMode r
+ 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 h' ← dup (plHandle pl)
- return pl { plHandle = h' }
+ dup pl = do ch' ← dup (plCloseH pl)
+ return pl { plCloseH = ch' }
-- | Open an ESD handle for playing a stream.
-openPlayer ∷ ( Frame fr
- , Channels ch
- , MonadCatchIO pr
- )
+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
- = return Player {
- plRate = rate
- , plHandle = error "FIXME: not implemented"
- }
+ = 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"