Track maximum amplitude and fix getMaxAmplitude()

- only start to track the max amplitude after the first call to getMaxAmplitude()

Change-Id: I64d3d9ca0542202a8535a211425e8bccceca50fc
4 files changed
tree: 596bf02fa9495c743c1069ecb99b5f134afac850
  1. camera/
  2. cmds/
  3. include/
  4. media/