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Re: Output Capture
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Re: Output Capture


  • Subject: Re: Output Capture
  • From: David Duncan <email@hidden>
  • Date: Wed, 18 Jul 2007 12:45:34 -0700

On Jul 18, 2007, at 12:29 PM, email@hidden wrote:

The trouble is that I have 2 carbon sound callbacks in my app, one for voice, and one for our game sound fx, and I can't mix those easily (for one thing their sample rates and number of channels are different, and for another, the code is leftover from OS 9 days and pretty complicated to dive into). But I COULD pipe these into core audio in a thread safe way from the 2 callbacks, and get 1 output. I just have no idea how to do this. I've read over the core audio manual pdf, it's just a lot to take in. So while the concepts are fairly simple, I don't feel ready to just start typing code, and was hoping for an example.

Rearrange your code. Cut out the sound manager and setup a graph to mix the two inputs together. You can use converter units to convert from the different sample rates. Pipe the output to a mixer unit and you can get the final mixed output from your audio system to do what you want with it. Core Audio is quite adept at handling the details that your dealing with if you tell it what you want it to do.


Yes, I realize that your old code is "pretty complicated" as you say, but this is what your going to have to do if you want to capture the output of your application for 10.3.9+.
--
David Duncan
Apple DTS Quartz and Printing
email@hidden



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References: 
 >Output Capture (From: email@hidden)
 >Re: Output Capture (From: Jeff Moore <email@hidden>)
 >Re: Output Capture (From: email@hidden)

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