I would like to route audio from one part of my software (out of a
QuickTime movie) to another part (a non-QT-based audio processing
environment), more or less in real-time. Until now, I have assumed
that I would need to write a special virtual device driver for this,
although the good people at coreaudio-api seem to think otherwise.
From what they say, and what I know so far, this leaves a couple of
options:
- Use the Audio Extraction API (or simple MovieExport Components for
compatibility across several versions of QT) to get the data, and
manually (attempt to) play it back in sync with the movie.
- Same, but by stepping through the media samples to retrieve the data
or, and this is the big hope:
- Create a custom Audio Context to take care of all of that mess
automatically.
However, I can't find any documentation as to how one creates an
Audio Context, beyond the generation of one from a device driver
(which is why I thought I would have to write my own driver). Is
there some way to create a "special" Audio Context which I could use
to simply re-route/process raw samples? Or am I stuck with the first
two options?
Thanks,
jb
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