Eric, I was hoping to use a packed format like ByteString eventually. Right now, I want to get everything working nicely. As it stands, I end up marshaling a lot of information into/out of arrays which I'd much rather keep as a block of memory.
I'm guessing that some sort of unboxed array would be close to what I want. If you have suggestions, I'm more than open to them. (This is my first attempt at writing a library.) /jve On Sun, Aug 24, 2008 at 1:06 PM, Eric Kidd <[EMAIL PROTECTED]> wrote: > On Sun, Aug 24, 2008 at 12:41 PM, John Van Enk <[EMAIL PROTECTED]> wrote: > > It implements the Haskell bindings to the PortAudio library. This is the > > library behind Audacious. I *have not* implemented the callback model > yet, > > but I plan to do that. > > > > Perhaps this will be something which is useful to you? > > Looks like a great binding! We actually use portaudio in callback mode > at work, with reasonable success (from C++). > > One question: I notice that your writeStream function represents audio > using '[[a]]'. > > writeStream :: (Storable a) => PaStream a -- ^ The output stream > -> [[a]] -- ^ The samples to be played > -> Int -- ^ Number of frames > -> IO (Either String ErrorCode) -- ^ The return status > of the write > > In my experiments, I've been somewhat unsatisfied with the performance > of '[[a]]' as an audio format. Would you be interested in also > supporting an array-based format for audio data? > > I'm currently converting my program to use HCodec's Data.Audio > representation, which looks pretty promising. I don't know how it > performs yet, but I'll let you know. > > Thank you for the pointer to your library! It will make an excellent > addition to the available Haskell sound libraries. > > Cheers, > Eric > -- /jve
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