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Apple lossless conversion failure
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Apple lossless conversion failure


  • Subject: Apple lossless conversion failure
  • From: Harry Plate <email@hidden>
  • Date: Wed, 04 May 2011 10:21:36 -0700

I am (finally) moving to Core Audio to replace some old Sound Manager code that
would extract/convert audio channels for our application. This conversion to Core Audio has
been pretty painless for the most part; except, I am running into issues w/ compressed audio
formats.

The code that I am using is based on the Core Audio "ConvertFile" example
[UseAC-AF.cpp]. I was able to use alot of that code verbatim.

I am being tripped up on a case w/ a .caf file ['alac', 6ch, 48kHz, 24b]. My
call to AudioConverterFillComplexBuffer() is returning '!dat'. My callback proc
read a single packet successfully.

The same .caf file using ConvertFile also results in a failure, but in the read callback
proc; ie, AudioFileReadPackets() returns 'wht?'

I'm stymied. Any comments/suggestions to get to the bottom of this failure?

-harry _______________________________________________
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