[wdmaudiodev] Re: Need help in wave test failure.
- From: Gaurav Khuntale <gauravkhuntale@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 14 Feb 2014 10:46:33 +0530
Hi Tim,
When i update Play Offset exact equal to total data that came to CopyTo,
then i saw that my driver is getting more than 1600 bytes of data ( but
less than 3200 bytes ) even though test is sending 1600 bytes only. Also
from the failure message " FAIL: Position (1600) is less than the amount of
data streamed (3200).", it seems that total data streamed is 3200 and i
think that extra data may be coming because of that separate thread which
is getting created in-between.
About data format, test is using different formats every time it tests the
case. For the logs which i provided in my original question, test used
8KHz, 1 channel and 8 bit data format.
Can you guess what could be the reason behind failure ?
Thanks.
On Thu, Feb 13, 2014 at 11:24 PM, Tim Roberts <timr@xxxxxxxxx> wrote:
> Gaurav Khuntale wrote:
> >
> > I am working on audio driver based on WaveCyclic port driver. I am
> > getting following failure in wave test,
>
> I'm not sure you're interpreting the error message correctly, although I
> also could be wrong. Consider:
>
>
> > Standard Streaming\Rendering Pin Tests\Streaming buffer from different
> > threads
> > Successfully instantiated KSPIN_DATAFLOW_IN pin
> > Submitting 1600 bytes to the pin
> > ...
> > pin position pos2.playoffset = 1440 , pos1.playOffset = 1600
> > FAIL: Position (1600) is less than the amount of data streamed
> (3200).
> >
> > While investigating about above failure, i got to know that my driver
> > is not getting total data ( 3200 bytes in above case ) that test sends.
>
> Note that the log says "Submitting 1600 bytes to the pin". It makes me
> wonder if the error is trying to say that someone is reporting that 3200
> bytes were streamed, when in fact only 1600 were sent.
>
> What's the data format? Is it 16kHz? Stereo? 16-bit? I'm wondering
> if, somewhere, you have a confusion between bytes and samples.
>
> I'm merely speculating, however.
>
>
> > Also when exactly CopyTo and GetPosition method gets called ?
>
> CopyTo is called when there is new data to transfer. GetPosition is
> polled quite often so the audio subsystem can monitor the real-time
> state of the stream.
>
> --
> Tim Roberts, timr@xxxxxxxxx
> Providenza & Boekelheide, Inc.
>
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