commit 1d3556d6a068f141ac390a04f6a9d92a70f8d7ed
author Andy Hung <hunga@google.com> Thu Mar 29 16:30:14 2018 -0700
committer Andy Hung <hunga@google.com> Mon Apr 02 14:19:24 2018 -0700
tree e89b4aa887013efbc8227dcf4c56addf4ab284b9
parent 1f03085b596f185d91ccae11b7c0d9f0bc8cd206

AudioTrack: Prevent server from reading client data after stop

Prior to this CL, if an AudioTrack client wrote audio data after
AudioTrack stop(), but before the track was drained by the server,
the newly written client data would be consumed in the drain.

We now limit the server read to the client write position on stop.
This interlocking is essential for rapid asynchronous AudioTrack
command processing.

Test: AudioTrack CTS, SoundPool looping, bug test case
Bug: 75788313
Change-Id: Ib70e3dc46afe047a8c6cf1fb906a618b3c66cc7f