Re: Streaming output?

On 11/14/2012 09:45 AM, [email protected] wrote:
> Hullo...
>
> I've got a few questions about setting OpenAL up for streaming audio output.
>
> I'm using OpenAL (via JOAL) in a system to replicate the sound of trains
> for a model railroad.  So far I've gotten the part about having multiple
> sources (trains) playing to a single, stationary listener, over the
> hardware audio output from the computer.
>
> What I'd like to do is redirect the audio output to a network stream so
> that the listener can pick it up over WiFi and listen to the sound through
> his smart-phone's headphones.
>
> Then I'd like to expand that to multiple listeners, each with his own
> context, with each context being streamed independently to a different
> user's phone.
>
> The key part I'm missing is how to create a context(?) that sends the
> output audio to a file (or other "soft" path) instead of to the hardware
> sound card.
>
> I seem to recall a fairly recent change/addition to OpenAL to create a
> "loopback" device or something similar that would do just that, but for
> the life of me I can't find the documentation to try it out.
>
> Forgive me if I'm mangling the terminology a bit.  I hope my question is
> clearer than I fear it is.  If not, I'll try to explain further.
>
> Any help would be much appreciated!


Hi, Mark,

Here's the spec for the OpenAL-Soft loopback extension:

http://kcat.strangesoft.net/openal-extensions/SOFT_loopback.txt


This lets you read back rendered audio into a buffer, rather than having 
the rendered audio sent to an audio device.  This should get you what 
you need.

--"J"

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