On Thu, 31 Jul 2003, Zinx Verituse wrote:
> Appologies if this has been answered before, but I have a dsp
> with no capture device (it's the primary(secondary?) on a
> ens1370), and haven't been able to get quake3 based engines to
> open it..
>
> echo "quake3.x86 0 0 disable" > /proc/asound/card0/pcm1c/oss
>
> The above can't work, because no capture device exists, and
> it seems to try opening with capture enabled if the capture
> device doesn't exist: It returns 'No such device' on the open
> of /dev/adsp, though sox will play to /dev/adsp fine.
>
> I also tried disabling the capture device that does exist
> (via /proc/asound/card0/pcm0c/oss) for the game -- It produced
> no noticable results (i.e., still returns 'No such device')
>
> I attempted hacking the binary to open /dev/adsp as O_WRONLY,
> but as you can imagine this resulted in the mmap failing..
>
> So.. Is there any way to make alsa's OSS emulation realize the
> application isn't going to use the capture when there is _no_
> capture device?
The patch bellow will fix your problem.
Jaroslav
Index: pcm_oss.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/core/oss/pcm_oss.c,v
retrieving revision 1.45
diff -u -r1.45 pcm_oss.c
--- pcm_oss.c 24 Jul 2003 21:02:45 -0000 1.45
+++ pcm_oss.c 31 Jul 2003 12:44:49 -0000
@@ -1614,8 +1614,12 @@
if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
&csubstream)) < 0) {
- snd_pcm_oss_release_file(pcm_oss_file);
- return err;
+ if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
+ snd_pcm_oss_release_file(pcm_oss_file);
+ return err;
+ } else {
+ csubstream = NULL;
+ }
}
pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
}
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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