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{-
PlayFile.hs (adapted from playfile.c in freealut)
Copyright (c) Sven Panne 2005-2009 <sven.panne@aedion.de>
This file is part of the ALUT package & distributed under a BSD-style license
See the file libraries/ALUT/LICENSE
-}
import Control.Monad ( when, unless )
import Data.List ( intersperse )
import Sound.ALUT
import System.Exit ( exitFailure )
import System.IO ( hPutStrLn, stderr )
-- This program loads and plays a variety of files.
playFile :: FilePath -> IO ()
playFile fileName = do
-- Create an AL buffer from the given sound file.
buf <- createBuffer (File fileName)
-- Generate a single source, attach the buffer to it and start playing.
[source] <- genObjectNames 1
buffer source $= Just buf
play [source]
-- Normally nothing should go wrong above, but one never knows...
errs <- get alErrors
unless (null errs) $ do
hPutStrLn stderr (concat (intersperse "," [ d | ALError _ d <- errs ]))
exitFailure
-- Check every 0.1 seconds if the sound is still playing.
let waitWhilePlaying = do
sleep 0.1
state <- get (sourceState source)
when (state == Playing) $
waitWhilePlaying
waitWhilePlaying
main :: IO ()
main = do
-- Initialise ALUT and eat any ALUT-specific commandline flags.
withProgNameAndArgs runALUT $ \progName args -> do
-- Check for correct usage.
unless (length args == 1) $ do
hPutStrLn stderr ("usage: " ++ progName ++ " <fileName>")
exitFailure
-- If everything is OK, play the sound file and exit when finished.
playFile (head args)
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