I don't see you mention GetFormatRepresentation(). Did you do that? What's the value of "wFormatTag" and "SubFormat" you're using? If you do those correctly, you should be able to see the name of your custom formats (returned by GetFormatRepresentation() function call) in the Default Format drop down list of the Advanced page of the audio properties panel.
_T
在 2007/2/12 的來信中，"William R. Huttel"
>Thanks for the response. I have
added the IAudioSystemEffectCustomFormats interface to my GFX. I do get
calls to GetFormatCount() and GetFormat() at APO startup. I still get no
calls to IsOutputFormatSupported() with anything other than float32 PCM,
no matter what encoded format I return from GetFormat(). I've tried
returning a PCM format (16 bit, 48K) just to see if I could write
integral PCM samples out to the SPDIF device. I want to implement
asymmetric formats in the GFX: float32 PCM in, and encoded SPDIF formats
out. I thus want to make certain the float32-int16 converter mentioned
in the "Data Formats" section of sysfx.doc is not attached to the
output of the GFX by the graph builder, as it must be bit-exact to the
device. The rest of "Data Formats" goes on to say that the
IsInputFormatSupported() should return a float format which matches the
sample rate and speaker config of the "decoded" format (I'm guessing
the returned format should be a float32 pcm variant of the output side,
which is the "encoded" format to me, but should otherwise match the
output format in sample rate and speaker mask (e.g. 48K and 5.1)). I've
found nothing more on IAudioSystemEffectCustomFormats except what is in
the swap code example, and the documentation in audioenginebaseapo.idl
(in the DDK). If this interface is the key to getting encoded formats
supported as output from the GFX, what more needs to be done other than
returning the supported formats via GetFormat(), and watching for them
on IsOutputFormatSupported()? Cheers, Bill On Feb 11, 2007, at 9:42 PM,
tachunir@xxxxxxxxxxxxxxxx wrote: > I believe you should first
implement the GetFormatCount(), GetFormat() > and
GetFormatRepresentation() functions in GFX. The audio engine will >
use these to determine what custom format your GFX supports, and use
> that in the IsOutputFormatSupported() calls. > > _T > >
$B:_(B 2007/2/11 $BE*PT?.Cf!$(B"William R. Huttel" $BDs5Z!'(B
> > >Hi, I need some help on getting encoded formats (such as
AC3) > supported by a Vista GFX. From the guidelines in sysfx.doc, I
have > removed CBaseAudioProecessingObject as a base from my GFX
class, and > instead added the 3 required interfaces, and implemented
my own > versions of their methods. Under "Data Formats" (in
sysfx.doc) it says > that a GFX may support "encoded" formats,
though it must support > float32 PCM on the audio engine-facing side
of the GFX. Regarding > "IsInputFormatSupported", the doc says that
the GFX should return a > float format that has the sample rate and
speaker configuration of the > "decoded" format (I'm presuming
from context that this is returned on > the IsInputFormatSupported()
call and not the IsOutput...). No matter > what I try I'm unable to
get an IsOutputFormatSupported call which has > anything other than a
float32 PCM data format. I can suggest, AC3, > PCM, etc. to no avail.
I have modified the swap example INF to install > a postmix effect
(GFX) on the SPDIF device, and add a custom UI; the > installation
appears successful. I have noticed that the "configure" > button
(which allows setting the speaker configuration) is inactive > for
the device -- are there presumed speaker configurations for SPDIF? >
is this expected behaviour ("configure" is not allowed on the SPDIF
> device, unlike "Speakers" and "Headphones")? In the swap
example, the > GFX exposes the interface:
"IAudioSystemEffectsCustomFormats". I've > tried exposing this
from my GFX, but the routines it adds are never > called. (There is
an AC3 format in it, so this looked promising.) Are > there any
further sources which would help me in adding an encoded > format as
output for a GFX? While I'm here, though somewhat unrelated, > I've
noticed a couple of things in the samples that might be typos, >
perhaps others have encountered these and can comment: spkrfill >
example (obtained from sysfxreuse.exe): SpkrFillAPO.cpp, line 512: if
> (inFormat.fFramesPerSecond != inFormat.fFramesPerSecond) { MyLog(
"fps > mismatch"); inFormat.fFramesPerSEcond =
inFormat.fFramesPerSecond; > hrInput = S_FALSE; } Is this meant to be
a comparison and set to the > output if not a match? From sysfx.inf
(in the 6000 DDK audio samples), > line 82:
[HdAudModel.PrimaryLineOutTopo.AddReg] should this be >
[HdAudio.SysFx.PrimaryLineOutTopo.AddReg] to be referenced by the >
preceding stanza? Bill ****************** WDMAUDIODEV addresses: Post
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