[wdmaudiodev] Re: Problem in AVStream Capture and renderer filter synchronisation
- From: swapnil kamble <swap.kamble@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Mon, 16 Feb 2009 13:21:25 +0530
Finally, I got it working, along with buffering mechanism. Thank you Tim and
Waldemar for your help.
On Sat, Feb 14, 2009 at 12:28 AM, <timr@xxxxxxxxx> wrote:
> On Thu, Feb 12, 2009 at 04:32:38PM +0530, swapnil kamble wrote:
> >
> > I have 2 separate filters, each having their own DispatchProcess
> > routines. As my current driver is based on "avssamp" sample. Currently my
> > both filter are having one single unique dataformat of 44100 , 16bit , 2
> > channels.
> > ...
> >
> > Render Process :-
> >
> > In case of render process where same file is rendered with same
> format
> > 44100,16,2 ProcessPin->BytesAvailable is 1764. I checked with data it is
> > getting received correctly but just in less bytes and which is different
> > from captures request(8192), the slower rate, may be causing problems .
>
> You can't control this. The capture and render filters are entirely
> separate, as are their buffers and timing. If you need to communicate
> between the two ends, then it is up to you to include buffer management
> to handle the mismatch.
>
> > To me this looked more dark when checked file of 11sec is
> > taking 40sec to render at this rate(333667) on render filter by
> graphedit.
> > So I tried with lower different values could make it tentatively 11-12
> sec,
> > but I am sure this will not be accurate. Do you know what standard values
> to
> > provide in AVStream in Timer for DPC ? Do I need different timer values
> for
> > capture and render ?
>
> It's not up to you. The system will hand you data to be rendered at
> whatever rate it is being sent from the application. You have to handle
> it at that rate.
>
> > So Can I increase the size of reception of data in RenderProcess ? Or Is
> > there any other way of getting both of them working in correct way ?
>
> Yes -- add some buffering. It's not easy.
>
> --
> Tim Roberts, timr@xxxxxxxxx
> Providenza & Boeklheide, Inc.
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--
...Swapnil
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