Date: Thu, 15 Jul 1999 21:04:37 +0200 (MET) From: Martin Kraft <kraft@hpcs14.dv.fal.de> To: freebsd-multimedia@freebsd.org Cc: cdoherty@nttmcl.com Subject: RE: SB Vibra16: more joy and rapture Message-ID: <199907151904.VAA05492@hpcs14.dv.fal.de>
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Chris,
your problem (posted on july 7) was:
> int format = AFMT_S16_LE;
> Ioctl( fd, SNDCTL_DSP_SETFMT, &format );
>
> at which point format == 0. disturbed, I then did
>
> Ioctl( fd, AFMT_QUERY, &format );
>
> thinking I might get the current format; and ioctl() failed!
>
> is this a characteristic of SB cards? can I safely assume if
> ioctl() returns ok from SNDCTL_DSP_SETFMT, that the
> format has been set?
I had the same situation, and this was, what I found today in an
earlier posting by runge <runge@rostock.zgdv.de> on january 3 in
mailing.freebsd.bugs (found it via www.deja.com):
> Subject: i386/9283: ioctl(SNDCTL_DSP_SETFMT) on /dev/audio (pcm)
> returns wrong value when sampling
[..]
> Environment:
> FreeBSD fietje 3.0-RELEASE FreeBSD 3.0-RELEASE #15: Sat Jan 2 17:28:59
> CET 1999
>
> >Description:
> if you configure the audio device (luigis pcm driver) for sampling and
> set the format via SNDCTL_DSP_SETFMT, the
> driver returns the wrong format, even if it's set to the right value.
> This bug even can be found in -current, guessing, it's in all previous
> versions as well.
> >How-To-Repeat:
> open device read-only and try changing the sample format. Check the
> return value and compare to input.
> >Fix:
> in /usr/src/sys/i386/isa/snd/sound.c change this:
>
> if (ask_init(d))
> *(int *)arg = d->play_fmt ;
>
> in line 992 (source of 3.0 RELEASE)
>
> to:
> if (ask_init(d))
> {
> if (d->play_fmt)
> *(int *)arg = d->play_fmt ;
> if (d->rec_fmt)
> *(int *)arg = d->rec_fmt ;
> }
I did this change, recompiled my kernel, and it works (using DAP).
Hope this also helps for you.
Martin (martin.kraft@fal.de)
P.S.: I don't follow freebsd-multimedia@freebsd.org; I just found
your question in www.deja.com. Please cc any comment to my personal
email address. Thanks.
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