tree a4afc4b8873879841bb1c703cc6b4eb9b2d86645
parent 908df1ab8c01c6d7a47760a0aea383cdf939905a
author Dhananjay Kumar <dhakumar@codeaurora.org> 1443686917 +0530
committer Dhananjay Kumar <dhakumar@codeaurora.org> 1444238546 +0530

hal: audio_extn: fix pop noise when FM is interrupted by voice call

Minor pop is observed when FM playback is stopped, this is due to
derouting of loopback devices while they still have audible data.
This is causing pops even when FM is stopped after playback, but
this pop is more perceivable in case of interruption by voice call.
Fix the issue by draining unmuted data before derouting FM playback.

Change-Id: If92e43f3a15f0a9cfdf2819827c7f7a0ba852e3d