audio policy: make input device selection more consistent

Move logic forcing capture device selection when in call
to engine so that the selection made when opening a capture stream
is consistent with the selection made when starting the stream.

Bug: 73148976
Test: manual with Oboe tester
Change-Id: Iee91ffff7d06fc98fdb2c6b54ff1528e7a82596d
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index 08bcf4d..83aec3b 100644
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -613,6 +613,23 @@
 
     uint32_t device = AUDIO_DEVICE_NONE;
 
+    // when a call is active, force device selection to match source VOICE_COMMUNICATION
+    // for most other input sources to avoid rerouting call TX audio
+    if (isInCall()) {
+        switch (inputSource) {
+        case AUDIO_SOURCE_DEFAULT:
+        case AUDIO_SOURCE_MIC:
+        case AUDIO_SOURCE_VOICE_RECOGNITION:
+        case AUDIO_SOURCE_UNPROCESSED:
+        case AUDIO_SOURCE_HOTWORD:
+        case AUDIO_SOURCE_CAMCORDER:
+            inputSource = AUDIO_SOURCE_VOICE_COMMUNICATION;
+            break;
+        default:
+            break;
+        }
+    }
+
     switch (inputSource) {
     case AUDIO_SOURCE_VOICE_UPLINK:
       if (availableDeviceTypes & AUDIO_DEVICE_IN_VOICE_CALL) {
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 29ec961..947529e 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -4530,10 +4530,13 @@
         }
     }
 
+    // If we are not in call and no client is active on this input, this methods returns
+    // AUDIO_DEVICE_NONE, causing the patch on the input stream to be released.
     audio_source_t source = inputDesc->getHighestPrioritySource(true /*activeOnly*/);
-    if (isInCall()) {
-        device = getDeviceAndMixForInputSource(AUDIO_SOURCE_VOICE_COMMUNICATION);
-    } else if (source != AUDIO_SOURCE_DEFAULT) {
+    if (source == AUDIO_SOURCE_DEFAULT && isInCall()) {
+        source = AUDIO_SOURCE_VOICE_COMMUNICATION;
+    }
+    if (source != AUDIO_SOURCE_DEFAULT) {
         device = getDeviceAndMixForInputSource(source);
     }