[Openal] Capture problems under Windows

[Daniel PEACOCK]

Hi Laszlo,

Were you able to confirm if the alcCaptureOpenDevice function on the latest
wrap_oal.dll (version 2.1.8.1) is actually succeeding on the systems where
capture doesn't work?

The source code under the OpenAL-Windows directory contains capture code
very similar to the code used in the private builds of the Creative OpenAL
implementation.  The call sequence you have put below is presumably from
the OpenAL-Sample directory, right?   That codebase is completely different
to the code that builds wrap_oal.dll.

Dan
Creative Labs, Inc.

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             Laszlo Menczel                                                
             <menczel at mailbox.                                             
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                                       Re: [Openal] Capture problems under 
                                       Windows                             
             07/18/2007 12:32                                              
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Hi,

I found the following call sequence in the current version of the code:

alcCaptureOpenDevice -> alCaptureInit_EXT -> alcOpenDevice ->
alcBackendOpen_ -> alcBackendOpenNative_ -> grab_read_native

'grab_read_native' for Win32 is a dummy function, the last call returns
NULL.

When I try to use the current version of the DLL from openal.org, capture
sometimes works, but most of the time it does not. I have four machines at
home (two with WinME, one Win2000 and one WinXP) and my test program and
the
CaptureWin32.exe demo from the SDK work only on one of them (the Win2000).
Since  the capture code is now closed (Dan Peacock said this in a previous
post) there is not much I can do to solve the problem. So much for OpenAL
being open source.

However, I don't really care about it any more. I nearly finished writing
my
own small capture library, and I will use that instead of OpenAL. I just
regret that I have wasted a week trying to sort out the mess. Anyway,
thanks
to all the people who tried to help me.

Laszlo Menczel
Szeged, Hungary

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