[Plib-users] Patch for plib and alsa oss emulation

[Felix <fx...@gm...>]

Hi,

I had trouble using plib with alsa oss emulation using the intel8x0 alsa
driver on a SiS7012 onboard sound device. Tuxkart and Flightgear both
gave me error messages about the sound device being temporarily
unavailable. At the same time the sound was scrambled and the programmes
seemed to be hanging otherwise.

The cause turned out to be that plib writes more data to the
(non-blocking) sound device with the default safety_margin than it can
take. The attached patch fixes this problem for linux, both Tuxkart and
Flightgear work fine :) and it doesn't break Torcs which was ok before.

However, it introduces a new function slDSP::fragmentsRemaining which
would have to be implemented (as dummy?) for other platforms.

Regards,
    Felix Kühling

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