On Thu, 16 Dec 2004 18:20:52 +0000, Keean Schupke <[EMAIL PROTECTED]> wrote: > In which case I would assume the whole sample is copied to the sound > cards buffer > before the play call returns, so you don't have to worry and just let it > be garbage collected. >
What do you mean? Yes the sample is copied to memory when loaded, but I still have to "worry" because if it's garbage colleced (ie, a "free" call is called on it) then the sound can not be played anymore (because the data is gone). /S > Keean > > Sebastian Sylvan wrote: > > >On Thu, 16 Dec 2004 12:35:55 +0000, Keean Schupke > ><[EMAIL PROTECTED]> wrote: > > > > > >>Okay, you want to poll to see if the sound is still playing... This is > >>not very > >>easy to do... > >> > >>You really want to use the low-buffer callback from the soundcard > >>driver to load the next sample into the buffer using DMA. (IE you > >>can pass a function to the driver to call when you sample has been > >>copied completely to the sound-cards memory). This is the way to > >>do it... > >> > >> play_then_free = do > >> set_callback (free_sample my_sample) > >> play_sample my_sample > >> > >>You can see that this provides the interface you want to the user (IE > >>samples are freed once they are finished with)... > >> > >> Keean. > >> > >> > > > > > >This is exactly how I do it for the Stream sound type, since this type > >of sound supplies a callback for when it reaches the end. The sound > >sample does not, though. > >(stream is streamed from disk, sound sample is loaded into memory). > > > >/S > > > > > > > > > > -- Sebastian Sylvan +46(0)736-818655 UIN: 44640862 _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
