commit 96d1dda4d0a99d02f595fe73f3c48e252dff50a9
author Eric Laurent <elaurent@google.com> Mon Mar 14 17:14:19 2022 +0100
committer Eric Laurent <elaurent@google.com> Thu Mar 17 16:08:47 2022 +0100
tree 3911b30be39eb21da942d27b1e5bc59c66330e05
parent 7b8bfe7bccc37e425e0485cf11f7bbae508c2df0

audio policy: LE audio broadcast routing policy

Implement routing policy for LE audio broadcast device.
LE audio broadcast device is only used if:
 - No call is active
 - Either MEDIA or SONIFICATION_RESPECTFUL is the highest priority active strategy
 OR the LE audio unicast device is not active

Bug: 213188698
Test: make
Change-Id: I47eb42066fe41c01867c35b1256241037583420b

services/audiopolicy/enginedefault/src/Engine.cpp

diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index dc34a38..cc24381 100644
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -344,6 +344,30 @@
             (getForceUse(AUDIO_POLICY_FORCE_FOR_MEDIA) == AUDIO_POLICY_FORCE_SPEAKER)) {
             devices2 = availableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_SPEAKER);
         }
+
+        // LE audio broadcast device is only used if:
+        // - No call is active
+        // - either MEDIA or SONIFICATION_RESPECTFUL is the highest priority active strategy
+        //   OR the LE audio unicast device is not active
+        if (devices2.isEmpty() && !isInCall()
+                && (strategy == STRATEGY_MEDIA || strategy == STRATEGY_SONIFICATION_RESPECTFUL)) {
+            legacy_strategy topActiveStrategy = STRATEGY_NONE;
+            for (const auto &ps : getOrderedProductStrategies()) {
+                if (outputs.isStrategyActive(ps)) {
+                    topActiveStrategy =  mLegacyStrategyMap.find(ps) != end(mLegacyStrategyMap) ?
+                            mLegacyStrategyMap.at(ps) : STRATEGY_NONE;
+                    break;
+                }
+            }
+
+            if (topActiveStrategy == STRATEGY_NONE || topActiveStrategy == STRATEGY_MEDIA
+                    || topActiveStrategy == STRATEGY_SONIFICATION_RESPECTFUL
+                    || !outputs.isAnyDeviceTypeActive(getAudioDeviceOutLeAudioUnicastSet())) {
+                devices2 =
+                        availableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_BLE_BROADCAST);
+            }
+        }
+
         if (devices2.isEmpty() && (getLastRemovableMediaDevices().size() > 0)) {
             if ((getForceUse(AUDIO_POLICY_FORCE_FOR_MEDIA) != AUDIO_POLICY_FORCE_NO_BT_A2DP)) {
                 // Get the last connected device of wired and bluetooth a2dp