diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 4059c302ca5a8..ae115d3e43795 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -3817,6 +3817,11 @@
+
+
+
+
diff --git a/services/core/java/com/android/server/camera/CameraServiceProxy.java b/services/core/java/com/android/server/camera/CameraServiceProxy.java
index 82b25665160f8..4cb7729bf340e 100644
--- a/services/core/java/com/android/server/camera/CameraServiceProxy.java
+++ b/services/core/java/com/android/server/camera/CameraServiceProxy.java
@@ -28,15 +28,20 @@ import android.os.IBinder;
import android.os.Message;
import android.os.Process;
import android.os.RemoteException;
+import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.UserManager;
+import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Slog;
+import com.android.server.LocalServices;
import com.android.server.ServiceThread;
import com.android.server.SystemService;
+import java.util.ArrayList;
import java.util.Collection;
+import java.util.List;
import java.util.Set;
/**
@@ -76,14 +81,52 @@ public class CameraServiceProxy extends SystemService
private ICameraService mCameraServiceRaw;
- private final ArraySet mActiveCameraIds = new ArraySet<>();
+ private final ArrayMap mActiveCameraUsage = new ArrayMap<>();
+ private final List mCameraUsageHistory = new ArrayList<>();
private static final String NFC_NOTIFICATION_PROP = "ro.camera.notify_nfc";
private static final String NFC_SERVICE_BINDER_NAME = "nfc";
private static final IBinder nfcInterfaceToken = new Binder();
private final boolean mNotifyNfc;
- private int mActiveCameraCount = 0;
+
+ /**
+ * Structure to track camera usage
+ */
+ private static class CameraUsageEvent {
+ public final int mCameraFacing;
+ public final String mClientName;
+
+ private boolean mCompleted;
+ private long mDurationOrStartTimeMs; // Either start time, or duration once completed
+
+ public CameraUsageEvent(int facing, String clientName) {
+ mCameraFacing = facing;
+ mClientName = clientName;
+ mDurationOrStartTimeMs = SystemClock.elapsedRealtime();
+ mCompleted = false;
+ }
+
+ public void markCompleted() {
+ if (mCompleted) {
+ return;
+ }
+ mCompleted = true;
+ mDurationOrStartTimeMs = SystemClock.elapsedRealtime() - mDurationOrStartTimeMs;
+ if (CameraServiceProxy.DEBUG) {
+ Slog.v(TAG, "A camera facing " + cameraFacingToString(mCameraFacing) +
+ " was in use by " + mClientName + " for " +
+ mDurationOrStartTimeMs + " ms");
+ }
+ }
+
+ /**
+ * Return duration of camera usage event, or 0 if the event is not done
+ */
+ public long getDuration() {
+ return mCompleted ? mDurationOrStartTimeMs : 0;
+ }
+ }
private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
@@ -120,10 +163,11 @@ public class CameraServiceProxy extends SystemService
public void notifyCameraState(String cameraId, int newCameraState, int facing,
String clientName) {
String state = cameraStateToString(newCameraState);
- if (DEBUG) Slog.v(TAG, "Camera " + cameraId + " facing " + facing + " state now " +
+ String facingStr = cameraFacingToString(facing);
+ if (DEBUG) Slog.v(TAG, "Camera " + cameraId + " facing " + facingStr + " state now " +
state + " for client " + clientName);
- updateActivityCount(cameraId, newCameraState);
+ updateActivityCount(cameraId, newCameraState, facing, clientName);
}
};
@@ -169,6 +213,9 @@ public class CameraServiceProxy extends SystemService
mContext.registerReceiver(mIntentReceiver, filter);
publishBinderService(CAMERA_SERVICE_PROXY_BINDER_NAME, mCameraServiceProxy);
+ publishLocalService(CameraServiceProxy.class, this);
+
+ CameraStatsJobService.schedule(mContext);
}
@Override
@@ -198,8 +245,8 @@ public class CameraServiceProxy extends SystemService
mCameraServiceRaw = null;
// All cameras reset to idle on camera service death
- boolean wasEmpty = mActiveCameraIds.isEmpty();
- mActiveCameraIds.clear();
+ boolean wasEmpty = mActiveCameraUsage.isEmpty();
+ mActiveCameraUsage.clear();
if ( mNotifyNfc && !wasEmpty ) {
notifyNfcService(/*enablePolling*/ true);
@@ -207,6 +254,25 @@ public class CameraServiceProxy extends SystemService
}
}
+ /**
+ * Dump camera usage events to log.
+ * Package-private
+ */
+ void dumpUsageEvents() {
+ synchronized(mLock) {
+ for (CameraUsageEvent e : mCameraUsageHistory) {
+ if (DEBUG) {
+ Slog.v(TAG, "Camera: " + e.mClientName + " used a camera facing " +
+ cameraFacingToString(e.mCameraFacing) + " for " +
+ e.getDuration() + " ms");
+ }
+ // TODO: Add event logging here
+ }
+ mCameraUsageHistory.clear();
+ }
+ CameraStatsJobService.schedule(mContext);
+ }
+
private void switchUserLocked(int userHandle) {
Set currentUserHandles = getEnabledUserHandles(userHandle);
mLastUser = userHandle;
@@ -274,21 +340,32 @@ public class CameraServiceProxy extends SystemService
return true;
}
- private void updateActivityCount(String cameraId, int newCameraState) {
+ private void updateActivityCount(String cameraId, int newCameraState, int facing, String clientName) {
synchronized(mLock) {
- boolean wasEmpty = mActiveCameraIds.isEmpty();
+ // Update active camera list and notify NFC if necessary
+ boolean wasEmpty = mActiveCameraUsage.isEmpty();
switch (newCameraState) {
case ICameraServiceProxy.CAMERA_STATE_OPEN:
break;
case ICameraServiceProxy.CAMERA_STATE_ACTIVE:
- mActiveCameraIds.add(cameraId);
+ CameraUsageEvent newEvent = new CameraUsageEvent(facing, clientName);
+ CameraUsageEvent oldEvent = mActiveCameraUsage.put(cameraId, newEvent);
+ if (oldEvent != null) {
+ Slog.w(TAG, "Camera " + cameraId + " was already marked as active");
+ oldEvent.markCompleted();
+ mCameraUsageHistory.add(oldEvent);
+ }
break;
case ICameraServiceProxy.CAMERA_STATE_IDLE:
case ICameraServiceProxy.CAMERA_STATE_CLOSED:
- mActiveCameraIds.remove(cameraId);
+ CameraUsageEvent doneEvent = mActiveCameraUsage.remove(cameraId);
+ if (doneEvent != null) {
+ doneEvent.markCompleted();
+ mCameraUsageHistory.add(doneEvent);
+ }
break;
}
- boolean isEmpty = mActiveCameraIds.isEmpty();
+ boolean isEmpty = mActiveCameraUsage.isEmpty();
if ( mNotifyNfc && (wasEmpty != isEmpty) ) {
notifyNfcService(isEmpty);
}
@@ -332,4 +409,15 @@ public class CameraServiceProxy extends SystemService
}
return "CAMERA_STATE_UNKNOWN";
}
+
+ private static String cameraFacingToString(int cameraFacing) {
+ switch (cameraFacing) {
+ case ICameraServiceProxy.CAMERA_FACING_BACK: return "CAMERA_FACING_BACK";
+ case ICameraServiceProxy.CAMERA_FACING_FRONT: return "CAMERA_FACING_FRONT";
+ case ICameraServiceProxy.CAMERA_FACING_EXTERNAL: return "CAMERA_FACING_EXTERNAL";
+ default: break;
+ }
+ return "CAMERA_FACING_UNKNOWN";
+ }
+
}
diff --git a/services/core/java/com/android/server/camera/CameraStatsJobService.java b/services/core/java/com/android/server/camera/CameraStatsJobService.java
new file mode 100644
index 0000000000000..b8a6846ced76d
--- /dev/null
+++ b/services/core/java/com/android/server/camera/CameraStatsJobService.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.android.server.camera;
+
+import android.app.job.JobInfo;
+import android.app.job.JobParameters;
+import android.app.job.JobScheduler;
+import android.app.job.JobService;
+import android.content.ComponentName;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.util.Slog;
+
+import java.util.concurrent.TimeUnit;
+
+import com.android.server.LocalServices;
+
+/**
+ * A JobService to periodically collect camera usage stats.
+ */
+public class CameraStatsJobService extends JobService {
+ private static final String TAG = "CameraStatsJobService";
+
+ // Must be unique within UID (system service)
+ private static final int CAMERA_REPORTING_JOB_ID = 0xCA3E7A;
+
+ private static ComponentName sCameraStatsJobServiceName = new ComponentName(
+ "android",
+ CameraStatsJobService.class.getName());
+
+ @Override
+ public boolean onStartJob(JobParameters params) {
+ CameraServiceProxy serviceProxy = LocalServices.getService(CameraServiceProxy.class);
+ if (serviceProxy == null) {
+ Slog.w(TAG, "Can't collect camera usage stats - no camera service proxy found");
+ return false;
+ }
+
+ serviceProxy.dumpUsageEvents();
+ return false;
+ }
+
+ @Override
+ public boolean onStopJob(JobParameters params) {
+ // All work is done in onStartJob, so nothing to stop here
+ return false;
+ }
+
+ public static void schedule(Context context) {
+
+ JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
+ if (js == null) {
+ Slog.e(TAG, "Can't collect camera usage stats - no Job Scheduler");
+ return;
+ }
+ js.schedule(new JobInfo.Builder(CAMERA_REPORTING_JOB_ID, sCameraStatsJobServiceName)
+ .setMinimumLatency(TimeUnit.DAYS.toMillis(1))
+ .setRequiresDeviceIdle(true)
+ .build());
+
+ }
+
+}
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index eca285a1a27be..c9be3a2c41ccf 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -775,13 +775,6 @@ public final class SystemServer {
mContentResolver = context.getContentResolver();
- if (!disableCameraService) {
- Slog.i(TAG, "Camera Service Proxy");
- traceBeginAndSlog("StartCameraServiceProxy");
- mSystemServiceManager.startService(CameraServiceProxy.class);
- traceEnd();
- }
-
// The AccountManager must come before the ContentService
traceBeginAndSlog("StartAccountManagerService");
mSystemServiceManager.startService(ACCOUNT_SERVICE_CLASS);
@@ -1531,6 +1524,12 @@ public final class SystemServer {
}
}
+ if (!disableCameraService) {
+ traceBeginAndSlog("StartCameraServiceProxy");
+ mSystemServiceManager.startService(CameraServiceProxy.class);
+ traceEnd();
+ }
+
// Before things start rolling, be sure we have decided whether
// we are in safe mode.
final boolean safeMode = wm.detectSafeMode();