Hi, Can you include or point me to the source for lispbuilder-sdl-glue.dll? I can't seem to find it anywhere.
Thanks. On Sat, Jan 17, 2009 at 11:06 PM, Luke Crook <[email protected]> wrote: > The SDL library creates a new thread to process audio data. It is this > thread that performs callbacks into the Lisp process to request audio > data. Because the audio thead is unknown to the Lisp process, a hang or a > crash results. Lispworks supports callbacks from foreign unknown threads > so this is not an issue, but SBCL, ECL & CLISP do not. I'm not sure what > the situation is under Linux & OS X. > > One alternative is a wrapper that handles the callback, then copies the > audio data to a global variable and sleeps until the buffer is filled by > lispbuilder-sdl. lispbuilder-sdl reads a variable each game loop to > determine if the audio buffer is empty, fills the buffer if necessary and > then wakes up the glue library which then copies audio data from the > global variable into the callback. A disadvantage is that audio will break > up if the frame rate is too low and the audio buffer too small. 15 fps and > above seems to work fine, but 10 fps is too slow. > > I have written a glue library to do this (glue-lispbuilder-sdl.dll). It is > Windows only at the momemnt. If someone can run MIXER-TEST & SQUASHED in > OS X & Linux and let me know if these crash then I'll create the necessary > makefile for the glue library. > > This is now in SVN. The glue DLL is available from > code.google.com/p/lispbuilder/downloads/list in the windows binary > archive, win32-lispbuilder-sdl-binaries-1.2.12.tgz. > > - Luke > _______________________________________________ > application-builder mailing list > [email protected] > http://www.lispniks.com/mailman/listinfo/application-builder > -- Elliott Slaughter "Any road followed precisely to its end leads precisely nowhere." - Frank Herbert
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