[wdmaudiodev] Re: What is different from w2k to XP in the WaveOut/In API?
- From: Uwe Kirst <u.kirst@xxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Mon, 04 Aug 2003 20:21:14 +0200
Hi,
I just observed a WODM_GETDEVCAPS message with WAVEOUTCAPS2 structure.
The dwparam2 (size) is 132 in that case.
It seems that the system gets confused if I turn on the power of my
audio device. If I start an audio application or the control panel
before the power is turned on it shows the 14 audio devices included in
my .dll, because I use constant values for the devicecaps of these
devices (the directKS part is not active at the moment). If I turn on
the power my dll gets DRVM_INIT / WIDM_INIT / WODM_INIT messages. I
reply MMSYSERR_NOTSUPPORTED.
Afterwards applications shows much more devices (> 200). The enumeration
process slows down the system. The names of the devices do not make
sense, because I do not copy the devicecaps structure, including the
name, if dwparam2 is > sizeof(WAVOUTDEVCAPS2). The question is where do
all these devices come form? WODM_GETNUMDEVS always returns 14;
I checked w2k again to be sure that it is still working with the current
.dll version.
Uwe
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