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Is is possible to have an AUGraph output to memory?
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Is is possible to have an AUGraph output to memory?


  • Subject: Is is possible to have an AUGraph output to memory?
  • From: Dave Camp <email@hidden>
  • Date: Thu, 10 May 2012 17:15:30 -0700

I'm working on a test harness for some Mac OS Core Audio codecs and file components we are working on. In a nutshell, I'd like to be able to run my test data through an AUGraph, but instead of outputting to a device, I'd like to save it to a buffer for offline analysis.

Is there a way to do this? I've setup a simple graph with a single format converter set to convert between two flavors of LPCM, set the render callback on the input of the converter, but when I start the graph I get a kAUGraphErr_NodeNotFound, presumably because there is no output node.

Will I need to create my own custom output component (something like the RAW sample file component) to do this? Or is there a way to associate a callback with the output of the converter that will be called with the converted samples?

Thanks,
Dave


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