[wdmaudiodev] Re: SRB data block size
- From: "John Brinkman" <john@xxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 26 Feb 2003 11:01:12 -0800
You might look at this property: KSPROPERTY_CONNECTION_ALLOCATORFRAMING
This property is used by a client to retrieve the framing requirements for
the pin.
I don't know if KMixer uses this property so treat this post as a "hint"
My driver does not support this property.
I have noticed that the size of the buffers can varied depending on the
application
that is using my stream class driver.
Regards,
John
----- Original Message -----
From: "BlazeAudio Developer" <developer@xxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Tuesday, February 25, 2003 5:53 PM
Subject: [wdmaudiodev] SRB data block size
>
> Hi,
>
> We have a stream class minidriver (on Windows XP, for a firewire audio
> device) that works fine when the internal buffering is 10ms or below, but
> we run into problems (driver starved of data) when the buffer size is
> increased. The internal buffering indirectly controls how often the driver
> completes the "pending" SRBs.
>
> This is very similar to the problem that Windows 3.1 drivers (and Win95 as
> well as WinNT 4 drivers) experienced when the DMA buffer size was
increased
> beyond a certain point. But that was directly related to how applications
> queued up the buffers.
>
> Does anybody know what determines the amount of data that KMixer (or is it
> Sysaudio) sends to the driver before waiting for the blocks to be
completed?
>
> I tried providing the KSPROPERTY_AUDIO_LATENCY property, but nobody
(KMixer
> or Sysaudio) seem to be interested in it - no get property calls come for
it.
>
> Is there a recommended maximum buffer size that KMixer assumes?
>
> Thanks.
> Devendra.
>
******************
WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
URL to WDMAUDIODEV page:
http://www.wdmaudiodev.de/
Other related posts:
