0001-core-Add-camera-intents-for-camera-state-1-2.patch

From dadcf0e790e60588f799630a2bab5f786f6b641c Mon Sep 17 00:00:00 2001
From: TheScarastic <warabhishek@gmail.com>
Date: Fri, 30 Aug 2019 20:02:35 +0530
Subject: [PATCH] core: Add camera intents for camera state [1/2]

Change-Id: Ib2e87a86d1f9d26c82f7de42c8cbfe526395ed9e
---
 core/res/AndroidManifest.xml                  |  3 ++
 .../server/camera/CameraServiceProxy.java     | 39 ++++++++++++++++++-
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 7d099cbe077..e323677152b 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -643,6 +643,9 @@
     <!-- Used for long press power torch feature - automatic turn off on timeout -->
     <protected-broadcast android:name="com.android.server.policy.PhoneWindowManager.ACTION_TORCH_OFF" />
 
+    <!-- Used to get camera status. -->
+    <protected-broadcast android:name="lineageos.intent.action.CAMERA_STATUS_CHANGED" />
+
     <!-- ====================================================================== -->
     <!--                          RUNTIME PERMISSIONS                           -->
     <!-- ====================================================================== -->
diff --git a/services/core/java/com/android/server/camera/CameraServiceProxy.java b/services/core/java/com/android/server/camera/CameraServiceProxy.java
index 6e22f8dd0de..09c6fe7deca 100644
--- a/services/core/java/com/android/server/camera/CameraServiceProxy.java
+++ b/services/core/java/com/android/server/camera/CameraServiceProxy.java
@@ -32,6 +32,7 @@ import android.os.Process;
 import android.os.RemoteException;
 import android.os.SystemClock;
 import android.os.SystemProperties;
+import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.ArrayMap;
 import android.util.ArraySet;
@@ -73,9 +74,12 @@ public class CameraServiceProxy extends SystemService
 
     // Handler message codes
     private static final int MSG_SWITCH_USER = 1;
+    private static final int MSG_CAMERA_CLOSED = 1001;
+    private static final int MSG_CAMERA_OPEN = 1002;
 
     private static final int RETRY_DELAY_TIME = 20; //ms
     private static final int RETRY_TIMES = 30;
+    private static final int CAMERA_EVENT_DELAY_TIME = 70; //ms
 
     // Maximum entries to keep in usage history before dumping out
     private static final int MAX_USAGE_HISTORY = 100;
@@ -103,6 +107,9 @@ public class CameraServiceProxy extends SystemService
     private final boolean mNotifyNfc;
     private final boolean mAllowMediaUid;
 
+    private long mClosedEvent;
+    private long mOpenEvent;
+
     /**
      * Structure to track camera usage
      */
@@ -195,6 +202,25 @@ public class CameraServiceProxy extends SystemService
                     state + " for client " + clientName + " API Level " + apiLevel);
 
             updateActivityCount(cameraId, newCameraState, facing, clientName, apiLevel);
+
+            if (facing == ICameraServiceProxy.CAMERA_FACING_FRONT) {
+                switch (newCameraState) {
+                   case ICameraServiceProxy.CAMERA_STATE_OPEN : {
+                       mOpenEvent = SystemClock.elapsedRealtime();
+                       if (SystemClock.elapsedRealtime() - mClosedEvent < CAMERA_EVENT_DELAY_TIME) {
+                           mHandler.removeMessages(MSG_CAMERA_CLOSED);
+                       }
+                       mHandler.sendEmptyMessageDelayed(MSG_CAMERA_OPEN, CAMERA_EVENT_DELAY_TIME);
+                   } break;
+                   case ICameraServiceProxy.CAMERA_STATE_CLOSED : {
+                       mClosedEvent = SystemClock.elapsedRealtime();
+                       if (SystemClock.elapsedRealtime() - mOpenEvent < CAMERA_EVENT_DELAY_TIME) {
+                           mHandler.removeMessages(MSG_CAMERA_OPEN);
+                       }
+                       mHandler.sendEmptyMessageDelayed(MSG_CAMERA_CLOSED, CAMERA_EVENT_DELAY_TIME);
+                   } break;
+                }
+            }
         }
     };
 
@@ -217,7 +243,13 @@ public class CameraServiceProxy extends SystemService
             case MSG_SWITCH_USER: {
                 notifySwitchWithRetries(msg.arg1);
             } break;
-            default: {
+            case MSG_CAMERA_CLOSED: {
+                sendCameraStateIntent("0");
+            } break;
+            case MSG_CAMERA_OPEN: {
+                sendCameraStateIntent("1");
+            } break;
+           default: {
                 Slog.e(TAG, "CameraServiceProxy error, invalid message: " + msg.what);
             } break;
         }
@@ -534,4 +566,9 @@ public class CameraServiceProxy extends SystemService
         return "CAMERA_FACING_UNKNOWN";
     }
 
+    private void sendCameraStateIntent(String cameraState) {
+        Intent intent = new Intent(lineageos.content.Intent.ACTION_CAMERA_STATUS_CHANGED);
+        intent.putExtra(lineageos.content.Intent.EXTRA_CAMERA_STATE, cameraState);
+        mContext.sendBroadcastAsUser(intent, UserHandle.SYSTEM);
+    }
 }
-- 
2.17.1