[wdmaudiodev] Re: KSEVENT_PINCAPS_FORMATCHANGE - bug in win8 control panel?
- From: Neetu Sand <neetu.freelist@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Sat, 13 Oct 2012 13:29:30 +0530
Here is some more information on this bug. I compared calls that driver
sees on Windows 7 and Window 8 (Both 64 bit). In following explanation it
is assumed that sample rate is changed from 48 kHz to 44.1 kHz.
Behavior on Windows 7:
- As soon as driver calls GenerateEventList with
KSEVENT_PINCAPS_FORMATCHANGE, OS sends KSPROPERTY_PIN_PROPOSEDATAFORMAT
with SET request on 48 kHz. Driver returns STATUS_NO_MATCH on this query.
- Then OS sends KSPROPERTY_PIN_PROPOSEDATAFORMAT GET request followed by a
SET request with 44.1 kHz.
Behavior on Windows 8:
- As soon as driver calls GenerateEventList with
KSEVENT_PINCAPS_FORMATCHANGE, OS sends KSPROPERTY_PIN_PROPOSEDATAFORMAT
with SET request on 48 kHz. Driver returns STATUS_NO_MATCH on this query.
So here OS does not send GET request upon receiving a failure code.
Moreover if I try to open device properties in Sound and Audio CPL and then
open "Advance" tab, here is what I see:
- OS sends KSPROPERTY_PIN_PROPOSEDATAFORMAT with SET request on 48 kHz.
Driver returns STATUS_NO_MATCH on this query. This happens 4 times.
- Then OS sends KSPROPERTY_PIN_PROPOSEDATAFORMAT with GET request followed
by a NewStream Call with 44.1 kHz (sample rate supported by device)
- Then OS enumerates all formats. Driver returns STATUS_SUCCESS only on
44.1 kHZ otherwise it returns STATUS_NO_MATCH.
- Still OS shows 48 kHz on the list.
So basically driver is working fine with Windows 7 but not with Windows 8.
Is there anything that I am missing here?
cheers,
Neetu
On Mon, Oct 1, 2012 at 5:21 PM, Neetu Sand <neetu.freelist@xxxxxxxxx> wrote:
> Edit: Driver returns STATUS_NO_MATCH for 44.1 formats.
>
>
> On Mon, Oct 1, 2012 at 2:46 PM, Neetu Sand <neetu.freelist@xxxxxxxxx>wrote:
>
>> Yes, I get calls to proposed format handler and driver returns
>> STATUS_NO_MATCH.
>>
>> One more thing is that if I open sound and Audio CPL and change default
>> entry from 44.1 kHz to 96 kHz and restart Sound CPL, the 44.1 kHz entry
>> disappears.
>>
>>
>> On Fri, Sep 28, 2012 at 9:36 PM, Matthew van Eerde <
>> Matthew.van.Eerde@xxxxxxxxxxxxx> wrote:
>>
>>> After you raise the “format change” event, Windows should requery your
>>> format support via the proposed format handler and your data intersection
>>> handler. If you fail all requests for 44.1 formats in your data
>>> intersection handler, then that should not appear in the list of supported
>>> formats in the Sound control panel.****
>>>
>>> ** **
>>>
>>> Can you confirm that you’re seeing calls to your data intersection
>>> handler and proposed format handler shortly after you raise the event?**
>>> **
>>>
>>> ** **
>>>
>>> *From:* wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:
>>> wdmaudiodev-bounce@xxxxxxxxxxxxx] *On Behalf Of *Neetu Sand
>>> *Sent:* Thursday, September 27, 2012 9:42 AM
>>> *To:* wdmaudiodev@xxxxxxxxxxxxx
>>> *Subject:* [wdmaudiodev] Re: KSEVENT_PINCAPS_FORMATCHANGE - bug in win8
>>> control panel?****
>>>
>>> ** **
>>>
>>> Say if I change from 44.1 kHz to 96 kHz then Sound and Audio CPL should
>>> show all formats related to 96 kHz.
>>>
>>> In Windows 8, it shows all formats (different bit depths) related to 96
>>> kHz as well it shows one entry for 44.1 kHz. This entry (44.1 kHz) is
>>> selected as default entry.
>>>
>>> Yes, driver is exposing preferred format in
>>> "PropertyHandlerProposedFormat" GET request.****
>>>
>>> On Thu, Sep 27, 2012 at 9:21 PM, Matthew van Eerde <
>>> Matthew.van.Eerde@xxxxxxxxxxxxx> wrote:****
>>>
>>> What were the old and new lists? What was the previously selected
>>> format?****
>>>
>>> ****
>>>
>>> Do you expose a “preferred” format?****
>>>
>>> ****
>>>
>>> *From:* wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:
>>> wdmaudiodev-bounce@xxxxxxxxxxxxx] *On Behalf Of *Neetu Sand
>>> *Sent:* Thursday, September 27, 2012 4:01 AM
>>> *To:* wdmaudiodev@xxxxxxxxxxxxx
>>> *Subject:* [wdmaudiodev] KSEVENT_PINCAPS_FORMATCHANGE - bug in win8
>>> control panel?****
>>>
>>> ****
>>>
>>> Hi All,
>>>
>>> We have a driver that supports dynamic format changes on windows 7. I
>>> tried same driver on windows 8 and here is what I have observed:
>>>
>>> - When I change sample rate, Sound and audio control panel correctly
>>> updates the sample rate list to reflect the formats related to new sample
>>> rate.
>>> - The default selected sample rate is set to previous/last selected
>>> sample rate.
>>> - When I try to play something in media player after changing sample
>>> rate, Sound and Audio CPL uses old sample rate.
>>>
>>> Is this a bug in Windows 8 or has anything changed on windows 8??
>>>
>>> cheers
>>> Neetu****
>>>
>>> ** **
>>>
>>
>>
>
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