Squashed commit of the following:

commit c45bfbb97ccd05982008df47181f9c73abaf0497
Author: Andreas Huber <andih@google.com>
Date:   Tue Sep 1 15:58:12 2009 -0700

    This quirk should not be enabled by default in order to make the bug reproducible by the vendor.

commit 21d72e80e795fcae53d9c3bcc8ba6312b081e420
Author: Andreas Huber <andih@google.com>
Date:   Tue Sep 1 15:55:45 2009 -0700

    Undoing the hack to temporarily give up the lock to facilitate reading from the buffer source.

    This simply causes too many issues, there need to be independent threads providing input buffers and dequeuing output buffers.

commit 84d507def8999c146ce124cc8edfe106c9ca70c2
Author: Andreas Huber <andih@google.com>
Date:   Tue Sep 1 15:16:23 2009 -0700

    The AAC components appear to output stereo data even if the input data is mono...