Re: sound support more info - kde2 porting status -- still looking for a volunteer

["Trevor Forbes" <trevorforbes at ozemail dot com dot au>]

Just a quick note to say I am still working on it.  The buffer was easy,
however, it uncovered other flaws which I am still working on....

Trevor


----- Original Message -----
From: "Trevor Forbes" <trevorforbes@ozemail.com.au>
To: <cygwin-developers@cygwin.com>; <cygwin-xfree@cygwin.com>
Sent: Wednesday, November 14, 2001 5:15 PM
Subject: Re: sound support more info - kde2 porting status -- still looking
for a volunteer


> Yea, I will give it a go......
>
> Trevor
>
> ----- Original Message -----
> From: "Christopher Faylor" <cgf@redhat.com>
> To: <cygwin-xfree@cygwin.com>; <cygwin-developers@cygwin.com>
> Sent: Wednesday, November 14, 2001 2:00 PM
> Subject: Re: sound support more info - kde2 porting status -- still
looking
> for a volunteer
>
>
> > This would be trivial to implement.
> >
> > I'd appreciate it if someone would take a stab at implementing it.
> >
> > cgf
> >
> > On Sat, Oct 20, 2001 at 11:50:14PM -0400, Christopher Faylor wrote:
> > >On Sat, Oct 20, 2001 at 08:47:37PM +0200, Ralf Habacker wrote:
> > >><snip>
> > >>>
> > >>> >6. the sound support of cygwin isn't ready. Especially setting
> > >>> >   of audio buffer size from an application is a problem.
> > >>> >   Look in the thread about the rocksndiamond game started with
> > >>> >   http://sources.redhat.com/ml/cygwin-xfree/2001-q4/msg00171.html.
> > >>>
> > >>> I didn't see anything which actually set the blocksize in the code
> > >>> fragment that you sent to cygwin-apps.  I just saw code which read
the
> > >>> block size and said "this should return 512".  But, cygwin uses a
> larger
> > >>> buffer than that.  I don't actually see an ioctl for setting the
block
> > >>> size under linux, but maybe I missed something.
> > >
> > >Duh.  You even mentioned this in your email.  Sorry for missing it.
> > >
> > >This looks like more than a simple fix to the fhandler_dsp.cc code but
it
> > >should be pretty easy if anyone wants to tackle it?
> > >
> > >Anyone interested in implementing SNDCTL_DSP_SETFRAGMENT?
> > >
> > >cgf
> > >>
> > >>It's called the fragment size and uses the SNDCTL_DSP_SETFRAGMENT
ioctl
> call.
> > >>It seems that the lower word contains the log2 of the buffer size and
in
> the
> > >>higher word the number of buffers are set. Currently Cygwin ignores
this
> call.
> > >>
> > >>   /* Example for fragment specification:
> > >>      - 2 buffers / 512 bytes (giving 1/16 second resolution for 8
kHz)
> > >>      - (with stereo the effective buffer size will shrink to 256)
> > >>      => fragment_size = 0x00020009 */
> > >>
> > >> if (ioctl(audio.device_fd,SNDCTL_DSP_SETFRAGMENT,&fragment_spec) < 0)
> > >>     Error(ERR_EXIT_SOUND_SERVER,
> > >>   "cannot set fragment size of /dev/dsp - no sounds");
> > >>
> > >>Ralf
> > >
> > >--
> > >cgf@cygnus.com                        Red Hat, Inc.
> > >http://sources.redhat.com/            http://www.redhat.com/
> >
> > --
> > cgf@redhat.com                        Red Hat, Inc.
> > http://sources.redhat.com/            http://www.redhat.com/
>