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AlloSphere-Research-Group / AlloSystem

AlloSystem is a cross-platform suite of C++ components for building interactive multimedia tools and applications.
http://mat.ucsb.edu/allosphere/software.php
BSD 3-Clause "New" or "Revised" License
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AudioIO: cannot create virtual channels #54

Closed LancePutnam closed 9 years ago

LancePutnam commented 9 years ago

In the latest devel, one can no longer create virtual channels with AudioIO. The code has changed to only create the min of the requested channels and max device channels. I updated the AudioIO unit test to illustrate the problem:

https://github.com/AlloSphere-Research-Group/AlloSystem/commit/dc5ec79a3f2175553812f0000d9a54a96618a365

mantaraya36 commented 9 years ago

Test now passes. Can you explain what this feature could be used for?

grrrwaaa commented 9 years ago

One example we used it for was the ambisonic domain signals. Kind of like a multi-pass render: the encoders sum into the virtual channels, the decoders read from these and multiplex into the real output channels. Respective channel counts can be quite different.

Another is to test code for > 2 channels when running about with just a laptop.

Graham

Graham Wakefield Assistant Professor, Canada Research Chair (Tier II), Digital Media, Visual Art & Art History, York University, 303C, Goldfarb Center for Fine Arts, 4700 Keele Street, Toronto ON, Canada 1 416 400 7421 www.grahamwakefield.net www.artificialnature.net

On Aug 17, 2015, at 7:39 PM, Andres Cabrera notifications@github.com wrote:

Test now passes. Can you explain what this feature could be used for?

� Reply to this email directly or view it on GitHub.

LancePutnam commented 9 years ago

Yes, good examples Graham. The initial reason I implemented them was the latter---running Allosphere code on a laptop without all kinds of channel count checks and separate code paths. You can still check the number of device channels opened if you want to do all that stuff...

mantaraya36 commented 9 years ago

Thanks for the ideas. It makes perfect sense.

On Thu, Aug 20, 2015 at 3:09 AM, Lance Putnam notifications@github.com wrote:

Yes, good examples Graham. The initial reason I implemented them was the latter---running Allosphere code on a laptop without all kinds of channel count checks and separate code paths. You can still check the number of device channels opened if you want to do all that stuff...

— Reply to this email directly or view it on GitHub https://github.com/AlloSphere-Research-Group/AlloSystem/issues/54#issuecomment-132926883 .