Re: [Qemu-devel] SB16 support

[Herbert Poetzl]

On Wed, Nov 05, 2003 at 12:46:19AM +0100, Fabrice Bellard wrote:
> malc wrote:
> >On Tue, 4 Nov 2003, Fabrice Bellard wrote:
> >
> >
> >>Thank you for the patch ! This is quite impressive.
> >>
> >>I cannot include as is as it needs some modifications to be more
> >>integrated in QEMU. I would have the following needs:
> >
> >Never thought it would be, since its couple of hours hack.
> >
> >
> >>1) Use SDL for audio rendering.
> >
> >I steered away from using SDL for audio in Minde(and by extension in sb16
> >emu). SDL uses callback mechanism for audio mixing. At least under *NIXes
> >the callback is called either by a thread (do you really want that in
> >QEMU?) or alarm handler (good bye straight forward host_alarm_handler
> >welcome headache)
> >
> >Current `aud.c' requires and expects so little from audio system that it
> >begs the question: what is simpler to retarget it for a bunch of OS/HW
> >specific audio systems or maintain SDL abstraction (which btw does not
> >even provide a way for querying current playing position)
> >
> >
> >>2) The whole patch should add only two files: dma.c for DMA emulation,
> >>sb16.c for sb16 emulation and sdlaudio.c for SDL audio driver.
> >
> >
> >I can try to pull this trick, but again, SDL audio decision needs to be
> >weighted in. Please e-mail me directly if you have some insights on how
> >to organize those files.
> 
> I agree that SDL audio is not flexible enough and that it complicates 
> the emulator. I thought it would be easier to port it to windows or 
> MacOS X, but maybe in thoses cases it would be better to simply rewrite 
> all the GUI stuff to use native menus. I don't have enough knowledge of 
> these OSes to tell what is the best solution. Is there also a solution 
> to play sound with VNC, as I think a VNC display system will be quite 
> useful.

yes, I think this would be really useful ...

keep up the good work!

best,
Herbert

> Currently, keeping the OSS API would suffice. So it gives the following 
> files: dma.c, sb16.c and oss.c.
> 
> Fabrice.
> 
> 
> 
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