[wdmaudiodev] Re: wdmaudiodev Digest V3 #116
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 4 Aug 2006 10:25:34 -0700
Hi Mike,
We recently fixed this behavior, however, you should be able to get
things working by returning S_FALSE and returning a suggested format of
32-bit float, 48k, and channel-count unchanged.
As of Winmain 5490.0.060731-1930, the SysFX APOs (GFX and LFX) will not
be passed IO format pairs which require SRC or int<->float conversion,
so it will be much easier for you to return S_OK or S_FALSE and specify
the channelcount you desire.
Let us know if you have further questions.
-Jeff
-----Original Message-----
From: FreeLists Mailing List Manager [mailto:ecartis@xxxxxxxxxxxxx]
Sent: Tuesday, August 01, 2006 11:04 PM
To: wdmaudiodev digest users
Subject: wdmaudiodev Digest V3 #116
wdmaudiodev Digest Tue, 01 Aug 2006 Volume: 03 Issue: 116
In This Issue:
[wdmaudiodev] Windows Vista APO channel conversion
question
----------------------------------------------------------------------
Date: Tue, 01 Aug 2006 19:26:48 -0700
From: "Michael R. Preston" <mike@xxxxxxxxxxxxxxxxxxx>
Subject: [wdmaudiodev] Windows Vista APO channel conversion question
Hi, all. I'm developing an APO for Windows Vista that will do some
channel conversion in the LFX. For example, if you're playing a stereo
MP3 or WMA file in Windows Media Player, and the system is in 8-channel
speaker mode, I want the LFX to be in control of how the channel
conversion happens. However, using Vista Beta 2, I'm having trouble
setting the input format the way I want. I'm playing a 44.1 kHz MP3 or
WMA file in Windows Media Player, and I'm on a system where the audio
hardware is locked to 48 kHz. In IsInputFormatSupported(), I can see
how Windows is trying to open the LFX. Since the system is in 8-channel
mode, the output format is always 8 channels at 48 kHz to match the
hardware. However, looking at the input format, Windows either wants me
to sample-rate-convert the audio from 44.1 kHz to 48 kHz while allowing
me to do the channel conversion, or Windows does the
sample-rate-conversion and channel conversion for me before getting to
my LFX. Why isn't there a 3rd option - let Windows do the
sample-rate-conversion, and let my LFX do the channel conversion?
Anyone have any info on this?
Thanks,
Mike Preston
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Mike Preston | Home/Office: (360)756-1655 |
| E-mail: mike@xxxxxxxxxxxxxxxxxxx | Cell: (360)303-9331 |
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
| The man who follows the crowd will usually get no |
| further than the crowd. The man who walks alone is |
| likely to find himself in places no one has ever been. |
| -- Alan Ashley-Pitt |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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End of wdmaudiodev Digest V3 #116
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