Re: VIA823x testing

["Tais M. Hansen" <tais.hansen@osd.dk>]

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On Tuesday 28 January 2003 17:21, Takashi Iwai wrote:
> > > please check the mixer configuration.
> > > there must be any sounds, even though pops/clicks and error messages
> > > might come.
> > No sound at all. I've tried turning everything up to full volume,
> > unmuting everything, tried all three onboard minijacks. Not a peep.
> hmm, then it seems something goes wrong completely.
> at least, i see the "invalid CURR_PTR" error at each call.
> it's weird.  did you see this in the log of ogg123?

Yes. Lots of those. I also noticed something else. Seems like there's some 
kind of overflow in the logging or something. I found a few lines that has 
been truncated like these:

Jan 28 17:30:44 proficio kernel: ALSA ../alsa-kernel/pci/via82xx.c:733: 
invURR_COUNT reg

Jan 28 17:30:46 proficio kernel: ALSA ../alsa-kernel/pcURR_COUNT reg

Jan 28 17:30:46 proficio kernel: ALSA ../alsa-kernel/p3: invalid CURR_COUNT 
reg

I'm guessing that too much output comes too fast, filling some buffer and 
truncating the rest. It's probably syslogd which truncates, but I thought I'd 
mention it anyway.


> > - From what I can see when playing with ogg123, it's speeding through the
> > ogg-file. It took 4.8s to play 10s ogg-file.
> interesting.
> the new patch will put the timestamp at each interrupt, so you can
> measure the period time between interrupts.
> this shoud be (period-size-in-frames * 4 / sample-rate)

I edited the patch. You inited a timeval tval, but referred to tv->sec and 
tv->usec. I'm guessing it should have been tval.tv_sec and tval.tv_usec.

> please compare the measured values.

I'm not sure what you mean with 'period-size-in-frames', so I just wrote up 
the numbers here.

8 'period elapsed' from ogg123 test (44100 Hz, 2 ch):

1043795039.736837 idx 0 ptr 0x0
+0.008531 idx+1 ptr+0x1000
1043795039.745368 idx 1 ptr 0x1000
+0.001152 idx+1 ptr+0x1000
1043795039.746520 idx 2 ptr 0x2000
+0.012034 idx+1 ptr+0x1000
1043795039.758554 idx 3 ptr 0x3000
+0.012041 idx+1 ptr+0x1000
1043795039.770595 idx 4 ptr 0x4000
+0.004189 idx+1 ptr+0x1000
1043795039.774784 idx 5 ptr 0x5000
+0.000696 idx+1 ptr+0x1000
1043795039.775480 idx 6 ptr 0x6000
+0.012130 idx+1 ptr+0x1000
1043795039.787610 idx 7 ptr 0x7000

5 'period elapsed' from aplay test (44100 Hz, 2 ch, Signed 16 bit Little 
Endian) period_size 4410:

1043794327.002204 idx 0 ptr 0x0
+0.012029 idx+5 ptr+0x44e8
1043794327.014233 idx 5 ptr 0x44e8
+0.012031 idx+5 ptr+0x44e8
1043794327.026264 idx 10 ptr 0x89d0
+0.012029 idx+5 ptr+0x44e8
1043794327.038293 idx 15 ptr 0xceb8
+0.012032 idx+6 ptr+0x44e8
1043794327.050325 idx 21 ptr 0x113a0

I'm not sure what to make of this. Sorry.

- -- 
Regards,
Tais M. Hansen
OSD

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