Re: making aoss able to wrap fopen() calls

[Peter Kirk <pwk.linuxfan@gmx.de>]

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Am Montag, 9. Februar 2004 15:07 schrieb Jaroslav Kysela:
> On Fri, 6 Feb 2004, Peter Kirk wrote:
> > Am Donnerstag, 5. Februar 2004 17:49 schrieb Jaroslav Kysela:
> > > > Could you point me to a good idea of implementing this ? On irc I was
> > > > discussing doing a libc wrapper that replaces the fopen calls with
> > > > some substitute (that aoss can handle), but I'm not sure if its the
> > > > way to go.
> > > >
> > > > Please tell me how it can be achieved.
> > >
> > > The whole libaoss is based on glibc wrappers (open, close, ioctl,
> > > write, read, mmap) so follow this rule ;-)
> >
> > Right,
> >
> > I have done some looking at source code, and have found the places I
> > needed to find (in alsa-oss.c).
> > Two questions:
> > (1) Is my assumtion right, that I will have to write substitute functions
> > for fopen(), fclose(), fread() and fwrite() ?
> >
> > (2) My current approach is to "translate" the f* calls into calls that
> > can be handled already. Is this a good idea ?
>
> I'm more digging to this problem now and it seems that it's completely
> broken idea. Basically the FILE structure is not public outside the glibc,
> so mangling is very hard and very difficult to maintain.
>
> The sox has already support for ALSA, but because it use f* calls, it's
> limited to "hw:X,Y" devices only. So I suggest to use pipes (and stdin or
> stdout in sox) rather than doing something very ugly.
>
> I also don't like very much the situation with the OSS->ALSA wrapper.
> Right now, I'm working on a very small library which will reroute the
> native OSS calls to any dynamic library. So ALSA, arts, esd and other
> audio subsystems can use modified OSS programs directly. The modification
> of one application requires only a few minutes for a middle skilled
> programmer. Now, I need persuade audio developers to use this library
> rather than direct calls.


Ok,

that propably explains why my patch causes some weird results...will not spend  
anymore time with it. Hopefuly I will see the day where I can use teamspeak 
with multiple input streams.

Thanks for the update, saves me from the headaches

Peter
- -- 
The husband who doesn't tell his wife everything probably reasons that
what she doesn't know won't hurt him.
		-- Leo J. Burke
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