| /* |
| * Copyright 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/LICENSE-2.0 |
| * |
| * 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.display; |
| |
| import android.annotation.Nullable; |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManager; |
| import android.app.ActivityTaskManager; |
| import android.content.BroadcastReceiver; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.ParceledListSlice; |
| import android.database.ContentObserver; |
| import android.graphics.PixelFormat; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.hardware.display.AmbientBrightnessDayStats; |
| import android.hardware.display.BrightnessChangeEvent; |
| import android.hardware.display.BrightnessConfiguration; |
| import android.hardware.display.ColorDisplayManager; |
| import android.hardware.display.DisplayManager; |
| import android.hardware.display.DisplayManagerInternal; |
| import android.hardware.display.DisplayedContentSample; |
| import android.hardware.display.DisplayedContentSamplingAttributes; |
| import android.net.Uri; |
| import android.os.BatteryManager; |
| import android.os.Environment; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.PowerManager; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| import android.util.AtomicFile; |
| import android.util.Slog; |
| import android.util.Xml; |
| import android.view.Display; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.os.BackgroundThread; |
| import com.android.internal.util.FastXmlSerializer; |
| import com.android.internal.util.RingBuffer; |
| import com.android.server.LocalServices; |
| |
| import libcore.io.IoUtils; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| import org.xmlpull.v1.XmlSerializer; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| import java.nio.charset.StandardCharsets; |
| import java.text.SimpleDateFormat; |
| import java.util.ArrayDeque; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.Deque; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Class that tracks recent brightness settings changes and stores |
| * associated information such as light sensor readings. |
| */ |
| public class BrightnessTracker { |
| |
| static final String TAG = "BrightnessTracker"; |
| static final boolean DEBUG = false; |
| |
| private static final String EVENTS_FILE = "brightness_events.xml"; |
| private static final String AMBIENT_BRIGHTNESS_STATS_FILE = "ambient_brightness_stats.xml"; |
| private static final int MAX_EVENTS = 100; |
| // Discard events when reading or writing that are older than this. |
| private static final long MAX_EVENT_AGE = TimeUnit.DAYS.toMillis(30); |
| // Time over which we keep lux sensor readings. |
| private static final long LUX_EVENT_HORIZON = TimeUnit.SECONDS.toNanos(10); |
| |
| private static final String TAG_EVENTS = "events"; |
| private static final String TAG_EVENT = "event"; |
| private static final String ATTR_NITS = "nits"; |
| private static final String ATTR_TIMESTAMP = "timestamp"; |
| private static final String ATTR_PACKAGE_NAME = "packageName"; |
| private static final String ATTR_USER = "user"; |
| private static final String ATTR_LUX = "lux"; |
| private static final String ATTR_LUX_TIMESTAMPS = "luxTimestamps"; |
| private static final String ATTR_BATTERY_LEVEL = "batteryLevel"; |
| private static final String ATTR_NIGHT_MODE = "nightMode"; |
| private static final String ATTR_COLOR_TEMPERATURE = "colorTemperature"; |
| private static final String ATTR_LAST_NITS = "lastNits"; |
| private static final String ATTR_DEFAULT_CONFIG = "defaultConfig"; |
| private static final String ATTR_POWER_SAVE = "powerSaveFactor"; |
| private static final String ATTR_USER_POINT = "userPoint"; |
| private static final String ATTR_COLOR_SAMPLE_DURATION = "colorSampleDuration"; |
| private static final String ATTR_COLOR_VALUE_BUCKETS = "colorValueBuckets"; |
| |
| private static final int MSG_BACKGROUND_START = 0; |
| private static final int MSG_BRIGHTNESS_CHANGED = 1; |
| private static final int MSG_STOP_SENSOR_LISTENER = 2; |
| private static final int MSG_START_SENSOR_LISTENER = 3; |
| private static final int MSG_BRIGHTNESS_CONFIG_CHANGED = 4; |
| |
| private static final SimpleDateFormat FORMAT = new SimpleDateFormat("MM-dd HH:mm:ss.SSS"); |
| |
| private static final long COLOR_SAMPLE_DURATION = TimeUnit.SECONDS.toSeconds(10); |
| // Sample chanel 2 of HSV which is the Value component. |
| private static final int COLOR_SAMPLE_COMPONENT_MASK = 0x1 << 2; |
| |
| // Lock held while accessing mEvents, is held while writing events to flash. |
| private final Object mEventsLock = new Object(); |
| @GuardedBy("mEventsLock") |
| private RingBuffer<BrightnessChangeEvent> mEvents |
| = new RingBuffer<>(BrightnessChangeEvent.class, MAX_EVENTS); |
| @GuardedBy("mEventsLock") |
| private boolean mEventsDirty; |
| |
| private volatile boolean mWriteBrightnessTrackerStateScheduled; |
| |
| private AmbientBrightnessStatsTracker mAmbientBrightnessStatsTracker; |
| |
| private final UserManager mUserManager; |
| private final Context mContext; |
| private final ContentResolver mContentResolver; |
| private final Handler mBgHandler; |
| |
| // These members should only be accessed on the mBgHandler thread. |
| private BroadcastReceiver mBroadcastReceiver; |
| private SensorListener mSensorListener; |
| private SettingsObserver mSettingsObserver; |
| private DisplayListener mDisplayListener; |
| private boolean mSensorRegistered; |
| private boolean mColorSamplingEnabled; |
| private int mNoFramesToSample; |
| private float mFrameRate; |
| private BrightnessConfiguration mBrightnessConfiguration; |
| // End of block of members that should only be accessed on the mBgHandler thread. |
| |
| private @UserIdInt int mCurrentUserId = UserHandle.USER_NULL; |
| |
| // Lock held while collecting data related to brightness changes. |
| private final Object mDataCollectionLock = new Object(); |
| @GuardedBy("mDataCollectionLock") |
| private Deque<LightData> mLastSensorReadings = new ArrayDeque<>(); |
| @GuardedBy("mDataCollectionLock") |
| private float mLastBatteryLevel = Float.NaN; |
| @GuardedBy("mDataCollectionLock") |
| private float mLastBrightness = -1; |
| @GuardedBy("mDataCollectionLock") |
| private boolean mStarted; |
| |
| private final Injector mInjector; |
| |
| public BrightnessTracker(Context context, @Nullable Injector injector) { |
| // Note this will be called very early in boot, other system |
| // services may not be present. |
| mContext = context; |
| mContentResolver = context.getContentResolver(); |
| if (injector != null) { |
| mInjector = injector; |
| } else { |
| mInjector = new Injector(); |
| } |
| mBgHandler = new TrackerHandler(mInjector.getBackgroundHandler().getLooper()); |
| mUserManager = mContext.getSystemService(UserManager.class); |
| } |
| |
| /** |
| * Start listening for brightness slider events |
| * |
| * @param initialBrightness the initial screen brightness |
| */ |
| public void start(float initialBrightness) { |
| if (DEBUG) { |
| Slog.d(TAG, "Start"); |
| } |
| mCurrentUserId = ActivityManager.getCurrentUser(); |
| mBgHandler.obtainMessage(MSG_BACKGROUND_START, (Float) initialBrightness).sendToTarget(); |
| } |
| |
| /** |
| * Update tracker with new brightness configuration. |
| */ |
| public void setBrightnessConfiguration(BrightnessConfiguration brightnessConfiguration) { |
| mBgHandler.obtainMessage(MSG_BRIGHTNESS_CONFIG_CHANGED, |
| brightnessConfiguration).sendToTarget(); |
| } |
| |
| private void backgroundStart(float initialBrightness) { |
| readEvents(); |
| readAmbientBrightnessStats(); |
| |
| mSensorListener = new SensorListener(); |
| |
| mSettingsObserver = new SettingsObserver(mBgHandler); |
| mInjector.registerBrightnessModeObserver(mContentResolver, mSettingsObserver); |
| startSensorListener(); |
| |
| final IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(Intent.ACTION_SHUTDOWN); |
| intentFilter.addAction(Intent.ACTION_BATTERY_CHANGED); |
| intentFilter.addAction(Intent.ACTION_SCREEN_ON); |
| intentFilter.addAction(Intent.ACTION_SCREEN_OFF); |
| mBroadcastReceiver = new Receiver(); |
| mInjector.registerReceiver(mContext, mBroadcastReceiver, intentFilter); |
| |
| mInjector.scheduleIdleJob(mContext); |
| synchronized (mDataCollectionLock) { |
| mLastBrightness = initialBrightness; |
| mStarted = true; |
| } |
| enableColorSampling(); |
| } |
| |
| /** Stop listening for events */ |
| @VisibleForTesting |
| void stop() { |
| if (DEBUG) { |
| Slog.d(TAG, "Stop"); |
| } |
| mBgHandler.removeMessages(MSG_BACKGROUND_START); |
| stopSensorListener(); |
| mInjector.unregisterSensorListener(mContext, mSensorListener); |
| mInjector.unregisterBrightnessModeObserver(mContext, mSettingsObserver); |
| mInjector.unregisterReceiver(mContext, mBroadcastReceiver); |
| mInjector.cancelIdleJob(mContext); |
| |
| synchronized (mDataCollectionLock) { |
| mStarted = false; |
| } |
| disableColorSampling(); |
| } |
| |
| public void onSwitchUser(@UserIdInt int newUserId) { |
| if (DEBUG) { |
| Slog.d(TAG, "Used id updated from " + mCurrentUserId + " to " + newUserId); |
| } |
| mCurrentUserId = newUserId; |
| } |
| |
| /** |
| * @param userId userId to fetch data for. |
| * @param includePackage if false we will null out BrightnessChangeEvent.packageName |
| * @return List of recent {@link BrightnessChangeEvent}s |
| */ |
| public ParceledListSlice<BrightnessChangeEvent> getEvents(int userId, boolean includePackage) { |
| BrightnessChangeEvent[] events; |
| synchronized (mEventsLock) { |
| events = mEvents.toArray(); |
| } |
| int[] profiles = mInjector.getProfileIds(mUserManager, userId); |
| Map<Integer, Boolean> toRedact = new HashMap<>(); |
| for (int i = 0; i < profiles.length; ++i) { |
| int profileId = profiles[i]; |
| // Include slider interactions when a managed profile app is in the |
| // foreground but always redact the package name. |
| boolean redact = (!includePackage) || profileId != userId; |
| toRedact.put(profiles[i], redact); |
| } |
| ArrayList<BrightnessChangeEvent> out = new ArrayList<>(events.length); |
| for (int i = 0; i < events.length; ++i) { |
| Boolean redact = toRedact.get(events[i].userId); |
| if (redact != null) { |
| if (!redact) { |
| out.add(events[i]); |
| } else { |
| BrightnessChangeEvent event = new BrightnessChangeEvent((events[i]), |
| /* redactPackage */ true); |
| out.add(event); |
| } |
| } |
| } |
| return new ParceledListSlice<>(out); |
| } |
| |
| public void persistBrightnessTrackerState() { |
| scheduleWriteBrightnessTrackerState(); |
| } |
| |
| /** |
| * Notify the BrightnessTracker that the user has changed the brightness of the display. |
| */ |
| public void notifyBrightnessChanged(float brightness, boolean userInitiated, |
| float powerBrightnessFactor, boolean isUserSetBrightness, |
| boolean isDefaultBrightnessConfig) { |
| if (DEBUG) { |
| Slog.d(TAG, String.format("notifyBrightnessChanged(brightness=%f, userInitiated=%b)", |
| brightness, userInitiated)); |
| } |
| Message m = mBgHandler.obtainMessage(MSG_BRIGHTNESS_CHANGED, |
| userInitiated ? 1 : 0, 0 /*unused*/, new BrightnessChangeValues(brightness, |
| powerBrightnessFactor, isUserSetBrightness, isDefaultBrightnessConfig, |
| mInjector.currentTimeMillis())); |
| m.sendToTarget(); |
| } |
| |
| private void handleBrightnessChanged(float brightness, boolean userInitiated, |
| float powerBrightnessFactor, boolean isUserSetBrightness, |
| boolean isDefaultBrightnessConfig, long timestamp) { |
| BrightnessChangeEvent.Builder builder; |
| |
| synchronized (mDataCollectionLock) { |
| if (!mStarted) { |
| // Not currently gathering brightness change information |
| return; |
| } |
| |
| float previousBrightness = mLastBrightness; |
| mLastBrightness = brightness; |
| |
| if (!userInitiated) { |
| // We want to record what current brightness is so that we know what the user |
| // changed it from, but if it wasn't user initiated then we don't want to record it |
| // as a BrightnessChangeEvent. |
| return; |
| } |
| |
| builder = new BrightnessChangeEvent.Builder(); |
| builder.setBrightness(brightness); |
| builder.setTimeStamp(timestamp); |
| builder.setPowerBrightnessFactor(powerBrightnessFactor); |
| builder.setUserBrightnessPoint(isUserSetBrightness); |
| builder.setIsDefaultBrightnessConfig(isDefaultBrightnessConfig); |
| |
| final int readingCount = mLastSensorReadings.size(); |
| if (readingCount == 0) { |
| // No sensor data so ignore this. |
| return; |
| } |
| |
| float[] luxValues = new float[readingCount]; |
| long[] luxTimestamps = new long[readingCount]; |
| |
| int pos = 0; |
| |
| // Convert sensor timestamp in elapsed time nanos to current time millis. |
| long currentTimeMillis = mInjector.currentTimeMillis(); |
| long elapsedTimeNanos = mInjector.elapsedRealtimeNanos(); |
| for (LightData reading : mLastSensorReadings) { |
| luxValues[pos] = reading.lux; |
| luxTimestamps[pos] = currentTimeMillis - |
| TimeUnit.NANOSECONDS.toMillis(elapsedTimeNanos - reading.timestamp); |
| ++pos; |
| } |
| builder.setLuxValues(luxValues); |
| builder.setLuxTimestamps(luxTimestamps); |
| |
| builder.setBatteryLevel(mLastBatteryLevel); |
| builder.setLastBrightness(previousBrightness); |
| } |
| |
| try { |
| final ActivityManager.StackInfo focusedStack = mInjector.getFocusedStack(); |
| if (focusedStack != null && focusedStack.topActivity != null) { |
| builder.setUserId(focusedStack.userId); |
| builder.setPackageName(focusedStack.topActivity.getPackageName()); |
| } else { |
| // Ignore the event because we can't determine user / package. |
| if (DEBUG) { |
| Slog.d(TAG, "Ignoring event due to null focusedStack."); |
| } |
| return; |
| } |
| } catch (RemoteException e) { |
| // Really shouldn't be possible. |
| return; |
| } |
| |
| builder.setNightMode(mInjector.isNightDisplayActivated(mContext)); |
| builder.setColorTemperature(mInjector.getNightDisplayColorTemperature(mContext)); |
| |
| if (mColorSamplingEnabled) { |
| DisplayedContentSample sample = mInjector.sampleColor(mNoFramesToSample); |
| if (sample != null && sample.getSampleComponent( |
| DisplayedContentSample.ColorComponent.CHANNEL2) != null) { |
| float numMillis = (sample.getNumFrames() / mFrameRate) * 1000.0f; |
| builder.setColorValues( |
| sample.getSampleComponent(DisplayedContentSample.ColorComponent.CHANNEL2), |
| Math.round(numMillis)); |
| } |
| } |
| |
| BrightnessChangeEvent event = builder.build(); |
| if (DEBUG) { |
| Slog.d(TAG, "Event " + event.brightness + " " + event.packageName); |
| } |
| synchronized (mEventsLock) { |
| mEventsDirty = true; |
| mEvents.append(event); |
| } |
| } |
| |
| private void startSensorListener() { |
| if (!mSensorRegistered |
| && mInjector.isInteractive(mContext) |
| && mInjector.isBrightnessModeAutomatic(mContentResolver)) { |
| mAmbientBrightnessStatsTracker.start(); |
| mSensorRegistered = true; |
| mInjector.registerSensorListener(mContext, mSensorListener, |
| mInjector.getBackgroundHandler()); |
| } |
| } |
| |
| private void stopSensorListener() { |
| if (mSensorRegistered) { |
| mAmbientBrightnessStatsTracker.stop(); |
| mInjector.unregisterSensorListener(mContext, mSensorListener); |
| mSensorRegistered = false; |
| } |
| } |
| |
| private void scheduleWriteBrightnessTrackerState() { |
| if (!mWriteBrightnessTrackerStateScheduled) { |
| mBgHandler.post(() -> { |
| mWriteBrightnessTrackerStateScheduled = false; |
| writeEvents(); |
| writeAmbientBrightnessStats(); |
| }); |
| mWriteBrightnessTrackerStateScheduled = true; |
| } |
| } |
| |
| private void writeEvents() { |
| synchronized (mEventsLock) { |
| if (!mEventsDirty) { |
| // Nothing to write |
| return; |
| } |
| |
| final AtomicFile writeTo = mInjector.getFile(EVENTS_FILE); |
| if (writeTo == null) { |
| return; |
| } |
| if (mEvents.isEmpty()) { |
| if (writeTo.exists()) { |
| writeTo.delete(); |
| } |
| mEventsDirty = false; |
| } else { |
| FileOutputStream output = null; |
| try { |
| output = writeTo.startWrite(); |
| writeEventsLocked(output); |
| writeTo.finishWrite(output); |
| mEventsDirty = false; |
| } catch (IOException e) { |
| writeTo.failWrite(output); |
| Slog.e(TAG, "Failed to write change mEvents.", e); |
| } |
| } |
| } |
| } |
| |
| private void writeAmbientBrightnessStats() { |
| final AtomicFile writeTo = mInjector.getFile(AMBIENT_BRIGHTNESS_STATS_FILE); |
| if (writeTo == null) { |
| return; |
| } |
| FileOutputStream output = null; |
| try { |
| output = writeTo.startWrite(); |
| mAmbientBrightnessStatsTracker.writeStats(output); |
| writeTo.finishWrite(output); |
| } catch (IOException e) { |
| writeTo.failWrite(output); |
| Slog.e(TAG, "Failed to write ambient brightness stats.", e); |
| } |
| } |
| |
| private void readEvents() { |
| synchronized (mEventsLock) { |
| // Read might prune events so mark as dirty. |
| mEventsDirty = true; |
| mEvents.clear(); |
| final AtomicFile readFrom = mInjector.getFile(EVENTS_FILE); |
| if (readFrom != null && readFrom.exists()) { |
| FileInputStream input = null; |
| try { |
| input = readFrom.openRead(); |
| readEventsLocked(input); |
| } catch (IOException e) { |
| readFrom.delete(); |
| Slog.e(TAG, "Failed to read change mEvents.", e); |
| } finally { |
| IoUtils.closeQuietly(input); |
| } |
| } |
| } |
| } |
| |
| private void readAmbientBrightnessStats() { |
| mAmbientBrightnessStatsTracker = new AmbientBrightnessStatsTracker(mUserManager, null); |
| final AtomicFile readFrom = mInjector.getFile(AMBIENT_BRIGHTNESS_STATS_FILE); |
| if (readFrom != null && readFrom.exists()) { |
| FileInputStream input = null; |
| try { |
| input = readFrom.openRead(); |
| mAmbientBrightnessStatsTracker.readStats(input); |
| } catch (IOException e) { |
| readFrom.delete(); |
| Slog.e(TAG, "Failed to read ambient brightness stats.", e); |
| } finally { |
| IoUtils.closeQuietly(input); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| @GuardedBy("mEventsLock") |
| void writeEventsLocked(OutputStream stream) throws IOException { |
| XmlSerializer out = new FastXmlSerializer(); |
| out.setOutput(stream, StandardCharsets.UTF_8.name()); |
| out.startDocument(null, true); |
| out.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| |
| out.startTag(null, TAG_EVENTS); |
| BrightnessChangeEvent[] toWrite = mEvents.toArray(); |
| // Clear events, code below will add back the ones that are still within the time window. |
| mEvents.clear(); |
| if (DEBUG) { |
| Slog.d(TAG, "Writing events " + toWrite.length); |
| } |
| final long timeCutOff = mInjector.currentTimeMillis() - MAX_EVENT_AGE; |
| for (int i = 0; i < toWrite.length; ++i) { |
| int userSerialNo = mInjector.getUserSerialNumber(mUserManager, toWrite[i].userId); |
| if (userSerialNo != -1 && toWrite[i].timeStamp > timeCutOff) { |
| mEvents.append(toWrite[i]); |
| out.startTag(null, TAG_EVENT); |
| out.attribute(null, ATTR_NITS, Float.toString(toWrite[i].brightness)); |
| out.attribute(null, ATTR_TIMESTAMP, Long.toString(toWrite[i].timeStamp)); |
| out.attribute(null, ATTR_PACKAGE_NAME, toWrite[i].packageName); |
| out.attribute(null, ATTR_USER, Integer.toString(userSerialNo)); |
| out.attribute(null, ATTR_BATTERY_LEVEL, Float.toString(toWrite[i].batteryLevel)); |
| out.attribute(null, ATTR_NIGHT_MODE, Boolean.toString(toWrite[i].nightMode)); |
| out.attribute(null, ATTR_COLOR_TEMPERATURE, Integer.toString( |
| toWrite[i].colorTemperature)); |
| out.attribute(null, ATTR_LAST_NITS, |
| Float.toString(toWrite[i].lastBrightness)); |
| out.attribute(null, ATTR_DEFAULT_CONFIG, |
| Boolean.toString(toWrite[i].isDefaultBrightnessConfig)); |
| out.attribute(null, ATTR_POWER_SAVE, |
| Float.toString(toWrite[i].powerBrightnessFactor)); |
| out.attribute(null, ATTR_USER_POINT, |
| Boolean.toString(toWrite[i].isUserSetBrightness)); |
| StringBuilder luxValues = new StringBuilder(); |
| StringBuilder luxTimestamps = new StringBuilder(); |
| for (int j = 0; j < toWrite[i].luxValues.length; ++j) { |
| if (j > 0) { |
| luxValues.append(','); |
| luxTimestamps.append(','); |
| } |
| luxValues.append(Float.toString(toWrite[i].luxValues[j])); |
| luxTimestamps.append(Long.toString(toWrite[i].luxTimestamps[j])); |
| } |
| out.attribute(null, ATTR_LUX, luxValues.toString()); |
| out.attribute(null, ATTR_LUX_TIMESTAMPS, luxTimestamps.toString()); |
| if (toWrite[i].colorValueBuckets != null |
| && toWrite[i].colorValueBuckets.length > 0) { |
| out.attribute(null, ATTR_COLOR_SAMPLE_DURATION, |
| Long.toString(toWrite[i].colorSampleDuration)); |
| StringBuilder buckets = new StringBuilder(); |
| for (int j = 0; j < toWrite[i].colorValueBuckets.length; ++j) { |
| if (j > 0) { |
| buckets.append(','); |
| } |
| buckets.append(Long.toString(toWrite[i].colorValueBuckets[j])); |
| } |
| out.attribute(null, ATTR_COLOR_VALUE_BUCKETS, buckets.toString()); |
| } |
| out.endTag(null, TAG_EVENT); |
| } |
| } |
| out.endTag(null, TAG_EVENTS); |
| out.endDocument(); |
| stream.flush(); |
| } |
| |
| @VisibleForTesting |
| @GuardedBy("mEventsLock") |
| void readEventsLocked(InputStream stream) throws IOException { |
| try { |
| XmlPullParser parser = Xml.newPullParser(); |
| parser.setInput(stream, StandardCharsets.UTF_8.name()); |
| |
| int type; |
| while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
| && type != XmlPullParser.START_TAG) { |
| } |
| String tag = parser.getName(); |
| if (!TAG_EVENTS.equals(tag)) { |
| throw new XmlPullParserException( |
| "Events not found in brightness tracker file " + tag); |
| } |
| |
| final long timeCutOff = mInjector.currentTimeMillis() - MAX_EVENT_AGE; |
| |
| parser.next(); |
| int outerDepth = parser.getDepth(); |
| while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
| && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { |
| if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { |
| continue; |
| } |
| tag = parser.getName(); |
| if (TAG_EVENT.equals(tag)) { |
| BrightnessChangeEvent.Builder builder = new BrightnessChangeEvent.Builder(); |
| |
| String brightness = parser.getAttributeValue(null, ATTR_NITS); |
| builder.setBrightness(Float.parseFloat(brightness)); |
| String timestamp = parser.getAttributeValue(null, ATTR_TIMESTAMP); |
| builder.setTimeStamp(Long.parseLong(timestamp)); |
| builder.setPackageName(parser.getAttributeValue(null, ATTR_PACKAGE_NAME)); |
| String user = parser.getAttributeValue(null, ATTR_USER); |
| builder.setUserId(mInjector.getUserId(mUserManager, Integer.parseInt(user))); |
| String batteryLevel = parser.getAttributeValue(null, ATTR_BATTERY_LEVEL); |
| builder.setBatteryLevel(Float.parseFloat(batteryLevel)); |
| String nightMode = parser.getAttributeValue(null, ATTR_NIGHT_MODE); |
| builder.setNightMode(Boolean.parseBoolean(nightMode)); |
| String colorTemperature = |
| parser.getAttributeValue(null, ATTR_COLOR_TEMPERATURE); |
| builder.setColorTemperature(Integer.parseInt(colorTemperature)); |
| String lastBrightness = parser.getAttributeValue(null, ATTR_LAST_NITS); |
| builder.setLastBrightness(Float.parseFloat(lastBrightness)); |
| |
| String luxValue = parser.getAttributeValue(null, ATTR_LUX); |
| String luxTimestamp = parser.getAttributeValue(null, ATTR_LUX_TIMESTAMPS); |
| |
| String[] luxValuesStrings = luxValue.split(","); |
| String[] luxTimestampsStrings = luxTimestamp.split(","); |
| if (luxValuesStrings.length != luxTimestampsStrings.length) { |
| continue; |
| } |
| float[] luxValues = new float[luxValuesStrings.length]; |
| long[] luxTimestamps = new long[luxValuesStrings.length]; |
| for (int i = 0; i < luxValues.length; ++i) { |
| luxValues[i] = Float.parseFloat(luxValuesStrings[i]); |
| luxTimestamps[i] = Long.parseLong(luxTimestampsStrings[i]); |
| } |
| builder.setLuxValues(luxValues); |
| builder.setLuxTimestamps(luxTimestamps); |
| |
| String defaultConfig = parser.getAttributeValue(null, ATTR_DEFAULT_CONFIG); |
| if (defaultConfig != null) { |
| builder.setIsDefaultBrightnessConfig(Boolean.parseBoolean(defaultConfig)); |
| } |
| String powerSave = parser.getAttributeValue(null, ATTR_POWER_SAVE); |
| if (powerSave != null) { |
| builder.setPowerBrightnessFactor(Float.parseFloat(powerSave)); |
| } else { |
| builder.setPowerBrightnessFactor(1.0f); |
| } |
| String userPoint = parser.getAttributeValue(null, ATTR_USER_POINT); |
| if (userPoint != null) { |
| builder.setUserBrightnessPoint(Boolean.parseBoolean(userPoint)); |
| } |
| |
| String colorSampleDurationString = |
| parser.getAttributeValue(null, ATTR_COLOR_SAMPLE_DURATION); |
| String colorValueBucketsString = |
| parser.getAttributeValue(null, ATTR_COLOR_VALUE_BUCKETS); |
| if (colorSampleDurationString != null && colorValueBucketsString != null) { |
| long colorSampleDuration = Long.parseLong(colorSampleDurationString); |
| String[] buckets = colorValueBucketsString.split(","); |
| long[] bucketValues = new long[buckets.length]; |
| for (int i = 0; i < bucketValues.length; ++i) { |
| bucketValues[i] = Long.parseLong(buckets[i]); |
| } |
| builder.setColorValues(bucketValues, colorSampleDuration); |
| } |
| |
| BrightnessChangeEvent event = builder.build(); |
| if (DEBUG) { |
| Slog.i(TAG, "Read event " + event.brightness |
| + " " + event.packageName); |
| } |
| |
| if (event.userId != -1 && event.timeStamp > timeCutOff |
| && event.luxValues.length > 0) { |
| mEvents.append(event); |
| } |
| } |
| } |
| } catch (NullPointerException | NumberFormatException | XmlPullParserException |
| | IOException e) { |
| // Failed to parse something, just start with an empty event log. |
| mEvents = new RingBuffer<>(BrightnessChangeEvent.class, MAX_EVENTS); |
| Slog.e(TAG, "Failed to parse brightness event", e); |
| // Re-throw so we will delete the bad file. |
| throw new IOException("failed to parse file", e); |
| } |
| } |
| |
| public void dump(final PrintWriter pw) { |
| pw.println("BrightnessTracker state:"); |
| synchronized (mDataCollectionLock) { |
| pw.println(" mStarted=" + mStarted); |
| pw.println(" mLastBatteryLevel=" + mLastBatteryLevel); |
| pw.println(" mLastBrightness=" + mLastBrightness); |
| pw.println(" mLastSensorReadings.size=" + mLastSensorReadings.size()); |
| if (!mLastSensorReadings.isEmpty()) { |
| pw.println(" mLastSensorReadings time span " |
| + mLastSensorReadings.peekFirst().timestamp + "->" |
| + mLastSensorReadings.peekLast().timestamp); |
| } |
| } |
| synchronized (mEventsLock) { |
| pw.println(" mEventsDirty=" + mEventsDirty); |
| pw.println(" mEvents.size=" + mEvents.size()); |
| BrightnessChangeEvent[] events = mEvents.toArray(); |
| for (int i = 0; i < events.length; ++i) { |
| pw.print(" " + FORMAT.format(new Date(events[i].timeStamp))); |
| pw.print(", userId=" + events[i].userId); |
| pw.print(", " + events[i].lastBrightness + "->" + events[i].brightness); |
| pw.print(", isUserSetBrightness=" + events[i].isUserSetBrightness); |
| pw.print(", powerBrightnessFactor=" + events[i].powerBrightnessFactor); |
| pw.print(", isDefaultBrightnessConfig=" + events[i].isDefaultBrightnessConfig); |
| pw.print(" {"); |
| for (int j = 0; j < events[i].luxValues.length; ++j){ |
| if (j != 0) { |
| pw.print(", "); |
| } |
| pw.print("(" + events[i].luxValues[j] + "," + events[i].luxTimestamps[j] + ")"); |
| } |
| pw.println("}"); |
| } |
| } |
| pw.println(" mWriteBrightnessTrackerStateScheduled=" |
| + mWriteBrightnessTrackerStateScheduled); |
| mBgHandler.runWithScissors(() -> dumpLocal(pw), 1000); |
| if (mAmbientBrightnessStatsTracker != null) { |
| pw.println(); |
| mAmbientBrightnessStatsTracker.dump(pw); |
| } |
| } |
| |
| private void dumpLocal(PrintWriter pw) { |
| pw.println(" mSensorRegistered=" + mSensorRegistered); |
| pw.println(" mColorSamplingEnabled=" + mColorSamplingEnabled); |
| pw.println(" mNoFramesToSample=" + mNoFramesToSample); |
| pw.println(" mFrameRate=" + mFrameRate); |
| } |
| |
| private void enableColorSampling() { |
| if (!mInjector.isBrightnessModeAutomatic(mContentResolver) |
| || !mInjector.isInteractive(mContext) |
| || mColorSamplingEnabled |
| || mBrightnessConfiguration == null |
| || !mBrightnessConfiguration.shouldCollectColorSamples()) { |
| return; |
| } |
| |
| mFrameRate = mInjector.getFrameRate(mContext); |
| if (mFrameRate <= 0) { |
| Slog.wtf(TAG, "Default display has a zero or negative framerate."); |
| return; |
| } |
| mNoFramesToSample = (int) (mFrameRate * COLOR_SAMPLE_DURATION); |
| |
| DisplayedContentSamplingAttributes attributes = mInjector.getSamplingAttributes(); |
| if (DEBUG && attributes != null) { |
| Slog.d(TAG, "Color sampling" |
| + " mask=0x" + Integer.toHexString(attributes.getComponentMask()) |
| + " dataSpace=0x" + Integer.toHexString(attributes.getDataspace()) |
| + " pixelFormat=0x" + Integer.toHexString(attributes.getPixelFormat())); |
| } |
| // Do we support sampling the Value component of HSV |
| if (attributes != null && attributes.getPixelFormat() == PixelFormat.HSV_888 |
| && (attributes.getComponentMask() & COLOR_SAMPLE_COMPONENT_MASK) != 0) { |
| |
| mColorSamplingEnabled = mInjector.enableColorSampling(/* enable= */true, |
| mNoFramesToSample); |
| if (DEBUG) { |
| Slog.i(TAG, "turning on color sampling for " |
| + mNoFramesToSample + " frames, success=" + mColorSamplingEnabled); |
| } |
| } |
| if (mColorSamplingEnabled && mDisplayListener == null) { |
| mDisplayListener = new DisplayListener(); |
| mInjector.registerDisplayListener(mContext, mDisplayListener, mBgHandler); |
| } |
| } |
| |
| private void disableColorSampling() { |
| if (!mColorSamplingEnabled) { |
| return; |
| } |
| mInjector.enableColorSampling(/* enable= */ false, /* noFrames= */ 0); |
| mColorSamplingEnabled = false; |
| if (mDisplayListener != null) { |
| mInjector.unRegisterDisplayListener(mContext, mDisplayListener); |
| mDisplayListener = null; |
| } |
| if (DEBUG) { |
| Slog.i(TAG, "turning off color sampling"); |
| } |
| } |
| |
| private void updateColorSampling() { |
| if (!mColorSamplingEnabled) { |
| return; |
| } |
| float frameRate = mInjector.getFrameRate(mContext); |
| if (frameRate != mFrameRate) { |
| disableColorSampling(); |
| enableColorSampling(); |
| } |
| } |
| |
| public ParceledListSlice<AmbientBrightnessDayStats> getAmbientBrightnessStats(int userId) { |
| if (mAmbientBrightnessStatsTracker != null) { |
| ArrayList<AmbientBrightnessDayStats> stats = |
| mAmbientBrightnessStatsTracker.getUserStats(userId); |
| if (stats != null) { |
| return new ParceledListSlice<>(stats); |
| } |
| } |
| return ParceledListSlice.emptyList(); |
| } |
| |
| // Not allowed to keep the SensorEvent so used to copy the data we care about. |
| private static class LightData { |
| public float lux; |
| // Time in elapsedRealtimeNanos |
| public long timestamp; |
| } |
| |
| private void recordSensorEvent(SensorEvent event) { |
| long horizon = mInjector.elapsedRealtimeNanos() - LUX_EVENT_HORIZON; |
| synchronized (mDataCollectionLock) { |
| if (DEBUG) { |
| Slog.v(TAG, "Sensor event " + event); |
| } |
| if (!mLastSensorReadings.isEmpty() |
| && event.timestamp < mLastSensorReadings.getLast().timestamp) { |
| // Ignore event that came out of order. |
| return; |
| } |
| LightData data = null; |
| while (!mLastSensorReadings.isEmpty() |
| && mLastSensorReadings.getFirst().timestamp < horizon) { |
| // Remove data that has fallen out of the window. |
| data = mLastSensorReadings.removeFirst(); |
| } |
| // We put back the last one we removed so we know how long |
| // the first sensor reading was valid for. |
| if (data != null) { |
| mLastSensorReadings.addFirst(data); |
| } |
| |
| data = new LightData(); |
| data.timestamp = event.timestamp; |
| data.lux = event.values[0]; |
| mLastSensorReadings.addLast(data); |
| } |
| } |
| |
| private void recordAmbientBrightnessStats(SensorEvent event) { |
| mAmbientBrightnessStatsTracker.add(mCurrentUserId, event.values[0]); |
| } |
| |
| private void batteryLevelChanged(int level, int scale) { |
| synchronized (mDataCollectionLock) { |
| mLastBatteryLevel = (float) level / (float) scale; |
| } |
| } |
| |
| private final class SensorListener implements SensorEventListener { |
| @Override |
| public void onSensorChanged(SensorEvent event) { |
| recordSensorEvent(event); |
| recordAmbientBrightnessStats(event); |
| } |
| |
| @Override |
| public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| |
| } |
| } |
| |
| private final class DisplayListener implements DisplayManager.DisplayListener { |
| |
| @Override |
| public void onDisplayAdded(int displayId) { |
| // Ignore |
| } |
| |
| @Override |
| public void onDisplayRemoved(int displayId) { |
| // Ignore |
| } |
| |
| @Override |
| public void onDisplayChanged(int displayId) { |
| if (displayId == Display.DEFAULT_DISPLAY) { |
| updateColorSampling(); |
| } |
| } |
| } |
| |
| private final class SettingsObserver extends ContentObserver { |
| public SettingsObserver(Handler handler) { |
| super(handler); |
| } |
| |
| @Override |
| public void onChange(boolean selfChange, Uri uri) { |
| if (DEBUG) { |
| Slog.v(TAG, "settings change " + uri); |
| } |
| if (mInjector.isBrightnessModeAutomatic(mContentResolver)) { |
| mBgHandler.obtainMessage(MSG_START_SENSOR_LISTENER).sendToTarget(); |
| } else { |
| mBgHandler.obtainMessage(MSG_STOP_SENSOR_LISTENER).sendToTarget(); |
| } |
| } |
| } |
| |
| private final class Receiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (DEBUG) { |
| Slog.d(TAG, "Received " + intent.getAction()); |
| } |
| String action = intent.getAction(); |
| if (Intent.ACTION_SHUTDOWN.equals(action)) { |
| stop(); |
| scheduleWriteBrightnessTrackerState(); |
| } else if (Intent.ACTION_BATTERY_CHANGED.equals(action)) { |
| int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); |
| int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 0); |
| if (level != -1 && scale != 0) { |
| batteryLevelChanged(level, scale); |
| } |
| } else if (Intent.ACTION_SCREEN_OFF.equals(action)) { |
| mBgHandler.obtainMessage(MSG_STOP_SENSOR_LISTENER).sendToTarget(); |
| } else if (Intent.ACTION_SCREEN_ON.equals(action)) { |
| mBgHandler.obtainMessage(MSG_START_SENSOR_LISTENER).sendToTarget(); |
| } |
| } |
| } |
| |
| private final class TrackerHandler extends Handler { |
| public TrackerHandler(Looper looper) { |
| super(looper, null, true /*async*/); |
| } |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_BACKGROUND_START: |
| backgroundStart((float)msg.obj /*initial brightness*/); |
| break; |
| case MSG_BRIGHTNESS_CHANGED: |
| BrightnessChangeValues values = (BrightnessChangeValues) msg.obj; |
| boolean userInitiatedChange = (msg.arg1 == 1); |
| handleBrightnessChanged(values.brightness, userInitiatedChange, |
| values.powerBrightnessFactor, values.isUserSetBrightness, |
| values.isDefaultBrightnessConfig, values.timestamp); |
| break; |
| case MSG_START_SENSOR_LISTENER: |
| startSensorListener(); |
| enableColorSampling(); |
| break; |
| case MSG_STOP_SENSOR_LISTENER: |
| stopSensorListener(); |
| disableColorSampling(); |
| break; |
| case MSG_BRIGHTNESS_CONFIG_CHANGED: |
| mBrightnessConfiguration = (BrightnessConfiguration) msg.obj; |
| boolean shouldCollectColorSamples = |
| mBrightnessConfiguration != null |
| && mBrightnessConfiguration.shouldCollectColorSamples(); |
| if (shouldCollectColorSamples && !mColorSamplingEnabled) { |
| enableColorSampling(); |
| } else if (!shouldCollectColorSamples && mColorSamplingEnabled) { |
| disableColorSampling(); |
| } |
| break; |
| |
| } |
| } |
| } |
| |
| private static class BrightnessChangeValues { |
| final float brightness; |
| final float powerBrightnessFactor; |
| final boolean isUserSetBrightness; |
| final boolean isDefaultBrightnessConfig; |
| final long timestamp; |
| |
| BrightnessChangeValues(float brightness, float powerBrightnessFactor, |
| boolean isUserSetBrightness, boolean isDefaultBrightnessConfig, |
| long timestamp) { |
| this.brightness = brightness; |
| this.powerBrightnessFactor = powerBrightnessFactor; |
| this.isUserSetBrightness = isUserSetBrightness; |
| this.isDefaultBrightnessConfig = isDefaultBrightnessConfig; |
| this.timestamp = timestamp; |
| } |
| } |
| |
| @VisibleForTesting |
| static class Injector { |
| public void registerSensorListener(Context context, |
| SensorEventListener sensorListener, Handler handler) { |
| SensorManager sensorManager = context.getSystemService(SensorManager.class); |
| Sensor lightSensor = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT); |
| sensorManager.registerListener(sensorListener, |
| lightSensor, SensorManager.SENSOR_DELAY_NORMAL, handler); |
| } |
| |
| public void unregisterSensorListener(Context context, SensorEventListener sensorListener) { |
| SensorManager sensorManager = context.getSystemService(SensorManager.class); |
| sensorManager.unregisterListener(sensorListener); |
| } |
| |
| public void registerBrightnessModeObserver(ContentResolver resolver, |
| ContentObserver settingsObserver) { |
| resolver.registerContentObserver(Settings.System.getUriFor( |
| Settings.System.SCREEN_BRIGHTNESS_MODE), |
| false, settingsObserver, UserHandle.USER_ALL); |
| } |
| |
| public void unregisterBrightnessModeObserver(Context context, |
| ContentObserver settingsObserver) { |
| context.getContentResolver().unregisterContentObserver(settingsObserver); |
| } |
| |
| public void registerReceiver(Context context, |
| BroadcastReceiver receiver, IntentFilter filter) { |
| context.registerReceiver(receiver, filter); |
| } |
| |
| public void unregisterReceiver(Context context, |
| BroadcastReceiver receiver) { |
| context.unregisterReceiver(receiver); |
| } |
| |
| public Handler getBackgroundHandler() { |
| return BackgroundThread.getHandler(); |
| } |
| |
| public boolean isBrightnessModeAutomatic(ContentResolver resolver) { |
| return Settings.System.getIntForUser(resolver, Settings.System.SCREEN_BRIGHTNESS_MODE, |
| Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL, UserHandle.USER_CURRENT) |
| == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC; |
| } |
| |
| public int getSecureIntForUser(ContentResolver resolver, String setting, int defaultValue, |
| int userId) { |
| return Settings.Secure.getIntForUser(resolver, setting, defaultValue, userId); |
| } |
| |
| public AtomicFile getFile(String filename) { |
| return new AtomicFile(new File(Environment.getDataSystemDeDirectory(), filename)); |
| } |
| |
| public long currentTimeMillis() { |
| return System.currentTimeMillis(); |
| } |
| |
| public long elapsedRealtimeNanos() { |
| return SystemClock.elapsedRealtimeNanos(); |
| } |
| |
| public int getUserSerialNumber(UserManager userManager, int userId) { |
| return userManager.getUserSerialNumber(userId); |
| } |
| |
| public int getUserId(UserManager userManager, int userSerialNumber) { |
| return userManager.getUserHandle(userSerialNumber); |
| } |
| |
| public int[] getProfileIds(UserManager userManager, int userId) { |
| if (userManager != null) { |
| return userManager.getProfileIds(userId, false); |
| } else { |
| return new int[]{userId}; |
| } |
| } |
| |
| public ActivityManager.StackInfo getFocusedStack() throws RemoteException { |
| return ActivityTaskManager.getService().getFocusedStackInfo(); |
| } |
| |
| public void scheduleIdleJob(Context context) { |
| BrightnessIdleJob.scheduleJob(context); |
| } |
| |
| public void cancelIdleJob(Context context) { |
| BrightnessIdleJob.cancelJob(context); |
| } |
| |
| public boolean isInteractive(Context context) { |
| return context.getSystemService(PowerManager.class).isInteractive(); |
| } |
| |
| public int getNightDisplayColorTemperature(Context context) { |
| return context.getSystemService(ColorDisplayManager.class) |
| .getNightDisplayColorTemperature(); |
| } |
| |
| public boolean isNightDisplayActivated(Context context) { |
| return context.getSystemService(ColorDisplayManager.class).isNightDisplayActivated(); |
| } |
| |
| public DisplayedContentSample sampleColor(int noFramesToSample) { |
| final DisplayManagerInternal displayManagerInternal = |
| LocalServices.getService(DisplayManagerInternal.class); |
| return displayManagerInternal.getDisplayedContentSample( |
| Display.DEFAULT_DISPLAY, noFramesToSample, 0); |
| } |
| |
| public float getFrameRate(Context context) { |
| final DisplayManager displayManager = context.getSystemService(DisplayManager.class); |
| Display display = displayManager.getDisplay(Display.DEFAULT_DISPLAY); |
| return display.getRefreshRate(); |
| } |
| |
| public DisplayedContentSamplingAttributes getSamplingAttributes() { |
| final DisplayManagerInternal displayManagerInternal = |
| LocalServices.getService(DisplayManagerInternal.class); |
| return displayManagerInternal.getDisplayedContentSamplingAttributes( |
| Display.DEFAULT_DISPLAY); |
| } |
| |
| public boolean enableColorSampling(boolean enable, int noFrames) { |
| final DisplayManagerInternal displayManagerInternal = |
| LocalServices.getService(DisplayManagerInternal.class); |
| return displayManagerInternal.setDisplayedContentSamplingEnabled( |
| Display.DEFAULT_DISPLAY, enable, COLOR_SAMPLE_COMPONENT_MASK, noFrames); |
| } |
| |
| public void registerDisplayListener(Context context, |
| DisplayManager.DisplayListener listener, Handler handler) { |
| final DisplayManager displayManager = context.getSystemService(DisplayManager.class); |
| displayManager.registerDisplayListener(listener, handler); |
| } |
| |
| public void unRegisterDisplayListener(Context context, |
| DisplayManager.DisplayListener listener) { |
| final DisplayManager displayManager = context.getSystemService(DisplayManager.class); |
| displayManager.unregisterDisplayListener(listener); |
| } |
| } |
| } |
