env LD_PRELOAD=/usr/lib/libaoss.so ....

env LD_PRELOAD=/usr/lib/libaoss.so ....

[Günther Montag]

hello friends
when I start my ham program with this preload
it says
***
hfkernel_user will be started by /usr/local/bin/hfkernel start
hfkernel[235]: hfkernel 0.4.1 starting...
ALSA lib pcm.c:1809:(snd_pcm_open_noupdate) Unknown PCM dsp0
hfkernel[235]: error: open: No such file or directory
***
although I called the soundcard right with /dev/dsp0,
the device is there (cat file > /dev/dsp0 gives a sound),
the same with /dev/adsp
somewhere (where?) on the way it seems to eat the /dev!

Another question:
I looked into the file alsa-lib-0.9.7/src/pcm/pcm.c, where this#
function snd_pcm_open_noupdate is,
thanjs Jaroslav for the very interesting documentation,
You made my day,
but if You have time tell me: it looks like html,
how  can I read it as html?

tnaks a lot
Günther
Safari.Doktor@addcom.de


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Re: env LD_PRELOAD=/usr/lib/libaoss.so ....

[Takashi Iwai]

At Thu, 16 Oct 2003 14:13:28 +0200,
G╴nther Montag wrote:
> 
> hello friends
> when I start my ham program with this preload
> it says
> ***
> hfkernel_user will be started by /usr/local/bin/hfkernel start
> hfkernel[235]: hfkernel 0.4.1 starting...
> ALSA lib pcm.c:1809:(snd_pcm_open_noupdate) Unknown PCM dsp0
> hfkernel[235]: error: open: No such file or directory
> ***
> although I called the soundcard right with /dev/dsp0,
> the device is there (cat file > /dev/dsp0 gives a sound),
> the same with /dev/adsp
> somewhere (where?) on the way it seems to eat the /dev!

when you use OSS-wrapper library, the access to /dev/dsp* or
/dev/adsp* will be coverted to the ALSA API.  that is, these files are
never accessed in practice.

the message above shows that you don't have the definition of dsp0 in
~/.asoundrc.  simply add

	pcm.dsp0 pcm.default

to ~/.asoundrc.

btw, it won't be a problem on cvs version, i fixed yesterday use the
default pcm as fallback.

> 
> Another question:
> I looked into the file alsa-lib-0.9.7/src/pcm/pcm.c, where this#
> function snd_pcm_open_noupdate is,
> thanjs Jaroslav for the very interesting documentation,
> You made my day,
> but if You have time tell me: it looks like html,
> how  can I read it as html?

you can generate the document via doxygen.
the already formatted html is found at
	http://www.alsa-project.org/alsa-doc/alsa-lib


Takashi


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Re: env LD_PRELOAD=/usr/lib/libaoss.so ....

[Dr. med. Günther Montag]

Hallo Takashi!
> ~/.asoundrc.  simply add
>
> 	pcm.dsp0 pcm.default
>
Thanks! It helped one step more!
Now:
***
hfkernel[1488]: hfkernel 0.4.2 starting...
hfkernel[1488]: Your soundcard is full duplex capable.
Good; the reference time will be
derived from the sample clock, which should be accurate within +-20ppm.
So I hope your soundcard uses 'real' crystals instead of cheap ceramic
resonators. Adjust the clock with the soundcard correction factor.
ALSA lib pcm_plug.c:727:(snd_pcm_plug_hw_refine_schange) Unable to find an 
usable access for 'dsp0'
hfkernel[1488]: error: probe_oss: mmap: ibuf: PROT_READ: Invalid argument

***
without success I  tried the things in the oss-emulatiuon.txt with echoing 
direct or block or non-block into /proc/asound/card0/pcm0c/oss etc.
in all variations.
Any more ideas?

> you can generate the document via doxygen.
> the already formatted html is found at
> 	http://www.alsa-project.org/alsa-doc/alsa-lib
>
Thanks, I found it, the doc is great, i must & will dig into it...
Günther

Safari.Doktor@addcom.de


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Re: env LD_PRELOAD=/usr/lib/libaoss.so ....

[Takashi Iwai]

At Thu, 16 Oct 2003 17:56:10 +0200,
Dr. med. G╴nther Montag wrote:
> 
> Hallo Takashi!
> > ~/.asoundrc.  simply add
> >
> > 	pcm.dsp0 pcm.default
> >
> Thanks! It helped one step more!
> Now:
> ***
> hfkernel[1488]: hfkernel 0.4.2 starting...
> hfkernel[1488]: Your soundcard is full duplex capable.
> Good; the reference time will be
> derived from the sample clock, which should be accurate within +-20ppm.
> So I hope your soundcard uses 'real' crystals instead of cheap ceramic
> resonators. Adjust the clock with the soundcard correction factor.
> ALSA lib pcm_plug.c:727:(snd_pcm_plug_hw_refine_schange) Unable to find an 
> usable access for 'dsp0'
> hfkernel[1488]: error: probe_oss: mmap: ibuf: PROT_READ: Invalid argument

hmm, how about the following?

	pcm.dsp0 {
		type hw
		card 0
	}


> ***
> without success I  tried the things in the oss-emulatiuon.txt with echoing 
> direct or block or non-block into /proc/asound/card0/pcm0c/oss etc.
> in all variations.

this proc file is for kernel OSS-emulation.
you were doing the user-space OSS-emulation via alsa-oss library.
they are different mechanisms.

if you start the oss application without libaoss wrapper, the kernel
OSS-emulation is used.  in this case, you need to set up the correct
modules and device permissions, etc.


Takashi


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Re: [Hfterm-hackers] Re: env LD_PRELOAD=/usr/lib/libaoss.so ....

[Günther Montag]

Hallo Takashi!
> >
> > > ~/.asoundrc.  simply add
> > >
> > > 	pcm.dsp0 pcm.default
> >
> > Thanks! It helped one step more!
> > Now:
> > ***
> > hfkernel[1488]: hfkernel 0.4.2 starting...
> > hfkernel[1488]: Your soundcard is full duplex capable.
> > Good; the reference time will be
> > derived from the sample clock, which should be accurate within +-20ppm.
> > So I hope your soundcard uses 'real' crystals instead of cheap ceramic
> > resonators. Adjust the clock with the soundcard correction factor.
> > ALSA lib pcm_plug.c:727:(snd_pcm_plug_hw_refine_schange) Unable to find
> > an usable access for 'dsp0'
> > hfkernel[1488]: error: probe_oss: mmap: ibuf: PROT_READ: Invalid argument
>
> hmm, how about the following?
>
> 	pcm.dsp0 {
> 		type hw
> 		card 0
> 	}
>
Oh, one step on! 
Now no error any more from the ALSA lib,
but still it says.
hfkernel[1488]: error: probe_oss: mmap: ibuf: PROT_READ: Invalid argument

this comes from last line of following snip:
***
 /*
         * set fragment sizes
         */
        apar = 0xffff0007U;
        if (ioctl(fd_audio, SNDCTL_DSP_SETFRAGMENT, &apar) == -1)
                errstr(SEV_FATAL, "ioctl: SNDCTL_DSP_SETFRAGMENT");
	if (ioctl(fd_audio, SNDCTL_DSP_GETOSPACE, &oinfo) == -1)
		errstr(SEV_FATAL, "ioctl: SNDCTL_DSP_GETOSPACE");
	osize = oinfo.fragstotal * oinfo.fragsize;
	if (ioctl(fd_audio, SNDCTL_DSP_GETISPACE, &iinfo) == -1)
		errstr(SEV_FATAL, "ioctl: SNDCTL_DSP_GETISPACE");
	isize = iinfo.fragstotal * iinfo.fragsize;
	if (EXCESS_FRAGS * iinfo.fragsize > pagesize)
		errprintf(SEV_FATAL, "OSS: input: fragment size %d times excess frags > page 
size %d\n",
			  iinfo.fragsize, pagesize);
	/*
         * mmap buffers
         *
	 * BSD people attention: you may need to uncomment the PROT_READ
	 * feedback welcome: sailer@ife.ee.ethz.ch
	 */
	if ((ibuf.v = mmap(NULL, isize, PROT_READ | PROT_WRITE, 
			   MAP_ANON | MAP_PRIVATE, -1, 0)) == MAP_FAILED)
		errstr(SEV_FATAL, "mmap: MAP_ANONYMOUS");
	ibuf_ext = ibuf.v + isize;
	if (munmap(ibuf.v, isize))
		errstr(SEV_FATAL, "munmap: MAP_ANONYMOUS");
	if ((ibuf.v = mmap(ibuf.v, isize, PROT_READ, MAP_FILE 
			  | MAP_SHARED | MAP_FIXED, 
			  fd_audio, 0)) == MAP_FAILED)

***
so i suppose something wrong with "isize"
only with ESS1938, it works with other cards.
Not-linear physical buffer in the card?
Do You know some hint, some trick out of ALSA API, how to "wrap" mmap? 
günther




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