commit 97ac871cd4f075b3d4b47557a81e9e05ad7762ec
author Eric Laurent <elaurent@google.com> Fri Jul 27 18:59:02 2018 -0700
committer Eric Laurent <elaurent@google.com> Mon Sep 10 14:07:45 2018 -0700
tree a6a547e02e4d736e45f275b4c93c2576ef30e675
parent dd6f1835aa352c167d04f4280289988faed7f590

audio policy: refactor preferred route implementation

Remove SessionRoute class and replace by use of
preferredDevice and active state in ClientDescriptor

Also fix the behavior for other clients using same strategy as
client with preferred route: the preferred route is only used if
no other clients using the same strategy are active without a preferred
route.
If all clients have a preferred route, the route of the last active
client is used.

Also fixed getOutputForAttr() to return correct selected device ID when
dynamic policies are used.

Test: CTS RoutingTest, AudioPlayRoutingNative, AudioRecordRoutingNative
Test: Manual: AudioExplicitRouting, UplinkMusicSampleApp

Change-Id: Id342c2241ace3e1a359ea74f4a539a395f793b86

services/audiopolicy/common/include/RoutingStrategy.h

diff --git a/services/audiopolicy/common/include/RoutingStrategy.h b/services/audiopolicy/common/include/RoutingStrategy.h
index d38967e..f8a1cd6 100644
--- a/services/audiopolicy/common/include/RoutingStrategy.h
+++ b/services/audiopolicy/common/include/RoutingStrategy.h
@@ -23,6 +23,7 @@
 #define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000
 
 enum routing_strategy {
+    STRATEGY_NONE = -1,
     STRATEGY_MEDIA,
     STRATEGY_PHONE,
     STRATEGY_SONIFICATION,