tree 9dc5dcdccac3993d0604b69ec08ad2ce75015664
parent 5d3d12bf58da5b48b1edb7c20b5d1edec0773f75
author Jean-Michel Trivi <jmtrivi@google.com> 1337122276 -0700
committer Jean-Michel Trivi <jmtrivi@google.com> 1337196525 -0700

Stereo downmixer supports generic configurations. Fix 7.1 downmix

Added a generic downmixer to stereo function to handle the
  multichannel configurations not supported by the dedicated
  downmix functions.
  It first verifies the mask is supported, and then derives
  channel indices for the downmix.
Added support for forcing the generic downmixer to be always
  used instead of the format-specific functions (define
  DOWNMIX_ALWAYS_USE_GENERIC_DOWNMIXER to force it).

Fixed 7.1 downmix function where handling of accumulate vs
  overwrite was inversed.

Bug 4280902

Change-Id: I8259b32c4e90f76ef4dcd803592fc71df4ae90c5