[wdmaudiodev] Re: audio device not showing up (except when manually loaded)
- From: Tim Newsham <tim.newsham@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 16 Sep 2009 20:00:18 -1000
After much trial and error and frustration I got it working. The bug
appears to be caused by me not giving a name to the PDO the bus driver
created with IoCreateDevice. I gave it a name and now it is showing up in
graphedt and windows media player.
On Wed, Sep 16, 2009 at 7:17 AM, Tim Newsham <tim.newsham@xxxxxxxxx> wrote:
> This is with two separate drivers loaded from two separate .inf files.
> Each has their own dispatch table so there is no need for me to manually
> handle dispatch. One .inf file describes the bus driver which I load
> manually with devcon (its now using a custom class, thank you for the tips),
> and the other describes a msvad-like virtual audio device which is
> dynamically attached to the bus driver during operation of the master device
> (which is the bus driver itself). The PNP subsystem sees the new device and
> interactively asks for a device driver. I point it to the inf file and it
> loads and I see my audio device initialize. However, when I go into windows
> media player and try to switch speaker devices, it doesn't create a new
> stream like it does when I manually load the virtual audio device separately
> from the bus device (for testing purposes).
>
>
> On Wed, Sep 16, 2009 at 6:51 AM, Tim Roberts <timr@xxxxxxxxx> wrote:
>
>> Tim Newsham wrote:
>> > This one has me baffled. I have an audio driver loosely based on
>> > msvad. If I load it from devcon manually I can select it as a
>> > "speaker" in windows media player. Recently I wrote a bus driver to
>> > control its loading and unloading and it is loading the driver.
>> > However after loading, it doesnt show up in the speaker selection in
>> > windows media player. The device properties in dev manager look
>> > almost identical to the manual-load. Devnode Flags says it is loaded
>> > and started. The biggest difference I notice is that Power State
>> > Mappings has s1 through s5 mapped to unspecified rather than to D3 (I
>> > think).
>> >
>> > Any idea what I could be doing wrong here?
>>
>> Is this with your "one driver" solution? Are you forwarding the
>> dispatches on to port class?
>>
>> --
>> Tim Roberts, timr@xxxxxxxxx
>> Providenza & Boekelheide, Inc.
>>
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>
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