[Openal-devel] tapping into openal output possible?

[Jason Daly]

Johahn Leung wrote:
> G'day,
>
> i am interested in porting our HRTF library with openAL and testing it 
> with the various games out there.
> In the first instance, i'd like to simply tap the output of the sound 
> card and create virtual 5.1 or 7.1 sources with 
> individual HRTFs and headphones.
>
> So my question is, is it possible to take the output of openAL, work 
> out which speaker the source or buffer will be send to?
> then I can add my filtering code there.
>
> I can't seem to find what i need looking at the source or buffer 
> properties, as they don't specify which speaker/channels
> it will be played in.

I don't think you'll be able to do this through the API.  If you look at 
the source for OpenAL-Soft, though, it shouldn't be too hard to figure 
out where to plug in your HRTF code.

In other words, I don't think you can tap the output of the sound card, 
but you should be able to tap the output from OpenAL *before* it's sent 
to the sound card.

Hope this helps,

--"J"