Re: [haskell-art] Sox wrapper
On Fri, Apr 24, 2009 at 11:13 AM, Henning Thielemann lemm...@henning-thielemann.de wrote: If playback with DirectSound works, that's fine. But it's not portable, right? Thus, getting something out of PortAudio would be better. Yes, that's right. The plan is to put the DirectSound library together with my CoreAudio code, and maybe in the future some kind of Linux audio system (though to be honest, at the moment I cannot imagine myself writing ALSA code, which seems to be the most widespread low-level Linux audio system, unless I have really good reasons to do it); so it will become in effect a cross-platform audio library written in Haskell. I started writing these because I was not satisfied with the existing solutions (I didn't try PortAudio though). For example I have OpenAL playback code too, and that's cross-platform, but unfortunately it seems that OpenAL is not really well-suited for this task (there is no callback/signaling mechanism, you have to poll continuously, and I don't know why but it is really unstable unless you have like a half second buffer, which is completely unacceptable for a realtime synth). Also, the more working solutions we have, the better it is, or not? Then one can choose the best for the given task. Balazs ___ haskell-art mailing list haskell-art@lurk.org http://lists.lurk.org/mailman/listinfo/haskell-art
Re: [haskell-art] Sox wrapper
I have no problem creating ~80MB files using sox (-0.0.1). Just playback hangs after a while. I also believe it's a windows-sox problem. I agree absolutely that a portable solution would be much better. Currently I am happy that DirectSound works, but I will take a look at PortAudio again for that reason. Henning Thielemann schrieb: On Thu, 23 Apr 2009, Daniel van den Eijkel wrote: Using sox to write files works without problems, so I did not try it with forkIO. But playback still stops after 414917 values. I will take a look at DirectSound now. Can Sox play large files at all? Can it play from a pipe? Maybe the problem is not a Haskell problem, but a Sox problem. If playback with DirectSound works, that's fine. But it's not portable, right? Thus, getting something out of PortAudio would be better. ___ haskell-art mailing list haskell-art@lurk.org http://lists.lurk.org/mailman/listinfo/haskell-art ___ haskell-art mailing list haskell-art@lurk.org http://lists.lurk.org/mailman/listinfo/haskell-art
Re: [haskell-art] Sox wrapper
Daniel van den Eijkel schrieb: Using forkIO makes no difference. I tried the following code (and some variations) but the program still hangs after ca. 40sec at a sampling rate11025 and ca. 10 sec at 44100. Maybe I'm doing something wrong. But now I need a break before the next attempt, can't hear this saw anymore :-) extended write srcOpts dstOpts sampleRate stream = do mvar - newEmptyMVar bracket (Proc.runInteractiveProcess play (Args.decons $ mconcat $ OptPriv.toArguments (mconcat $ srcOpts : Option.numberOfChannels (Frame.withSignal Frame.numberOfChannels stream) : Option.sampleRate sampleRate : Option.format (Frame.withSignal Frame.format stream) : []) : Args.pipe : OptPriv.toArguments dstOpts : []) Nothing Nothing) (\(input,output,err,_proc) - mapM_ IO.hClose [input, output, err]) (\(input,_,_,proc) - do -- hSetBuffering input (BlockBuffering Nothing) -- hSetBinaryMode input True forkIO $ do write input stream xcode - Proc.waitForProcess proc putMVar mvar xcode --putStrLn done return () readMVar mvar) Hm, complicated. Did you try the Write module in the same way? Does it also hang? Did you try to write a file with StorableVector.hPut directly? ___ haskell-art mailing list haskell-art@lurk.org http://lists.lurk.org/mailman/listinfo/haskell-art
