Remove the notion of "active track" from mixer

This is a first step towards making the mixer more object-oriented.

Change-Id: Ifd445d0e471023a7f5c82e934736ffc95ba1b05b
3 files changed
tree: 417c958c4fd243f4edb7bc765f4dc1e709456ddc
  1. camera/
  2. cmds/
  3. drm/
  4. include/
  5. media/
  6. services/