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

["Günther Montag" <Safari.Doktor@addcom.de>]

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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