AUHAL for input - format change?
AUHAL for input - format change?
- Subject: AUHAL for input - format change?
- From: "Tim Dorcey" <email@hidden>
- Date: Sat, 23 Apr 2005 22:38:34 -0700
- Importance: Normal
I had been using an AudioDevice ioProc to capture audio from the default
input device. I just got a report that captured audio (from iSight camera)
is garbled on Tiger. Not sure yet that problem is specific to my app, but
decided it was probably time to upgrade to using AUHAL for input, as
recommended in TN2091.
My old code installs a deviceListenerProc to listen for changes in the
captured stream format, and reconfigure my AudioConverter accordingly. I do
not see mention of how this is handled by AUHAL? TN2091 suggests querying
the input stream format once at initialization, but it also says that AUHAL
can only do "simple" conversions itself.
How do I know that AudioUnitRender is not going to start giving me different
format audio midstream?
Tim
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