Merge cherrypicks of [5532243, 5532244, 5532245, 5532246, 5532247, 5532826, 5530552, 5532902, 5530553, 5531520, 5532903, 5530554, 5529581, 5529582, 5531521, 5532979, 5532999, 5532248, 5531522, 5531523, 5531524, 5531525, 5531526, 5529583, 5529584, 5529585, 5529586, 5531351, 5529632, 5530506, 5530507, 5532980, 5533000] into pi-qpr1-release

Change-Id: I54e55b47d6cf9be58ff9507b521f615fb7b4a573

services/core/java/com/android/server/camera/CameraServiceProxy.java

diff --git a/services/core/java/com/android/server/camera/CameraServiceProxy.java b/services/core/java/com/android/server/camera/CameraServiceProxy.java
index 0ee55ed..527539d 100644
--- a/services/core/java/com/android/server/camera/CameraServiceProxy.java
+++ b/services/core/java/com/android/server/camera/CameraServiceProxy.java
@@ -21,6 +21,7 @@
 import android.content.IntentFilter;
 import android.hardware.ICameraService;
 import android.hardware.ICameraServiceProxy;
+import android.media.AudioManager;
 import android.metrics.LogMaker;
 import android.nfc.INfcAdapter;
 import android.os.Binder;
@@ -393,6 +394,19 @@
             boolean wasEmpty = mActiveCameraUsage.isEmpty();
             switch (newCameraState) {
                 case ICameraServiceProxy.CAMERA_STATE_OPEN:
+                    // Notify the audio subsystem about the facing of the most-recently opened
+                    // camera This can be used to select the best audio tuning in case video
+                    // recording with that camera will happen.  Since only open events are used, if
+                    // multiple cameras are opened at once, the one opened last will be used to
+                    // select audio tuning.
+                    AudioManager audioManager = getContext().getSystemService(AudioManager.class);
+                    if (audioManager != null) {
+                        // Map external to front for audio tuning purposes
+                        String facingStr = (facing == ICameraServiceProxy.CAMERA_FACING_BACK) ?
+                                "back" : "front";
+                        String facingParameter = "cameraFacing=" + facingStr;
+                        audioManager.setParameters(facingParameter);
+                    }
                     break;
                 case ICameraServiceProxy.CAMERA_STATE_ACTIVE:
                     CameraUsageEvent newEvent = new CameraUsageEvent(facing, clientName, apiLevel);