| /* |
| * Copyright (C) 2012 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 com.android.internal.app.IBatteryStats; |
| import com.android.server.LocalServices; |
| import com.android.server.am.BatteryStatsService; |
| |
| import android.animation.Animator; |
| import android.animation.ObjectAnimator; |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.hardware.display.DisplayManagerInternal.DisplayPowerCallbacks; |
| import android.hardware.display.DisplayManagerInternal.DisplayPowerRequest; |
| 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.Trace; |
| import android.util.MathUtils; |
| import android.util.Slog; |
| import android.util.Spline; |
| import android.util.TimeUtils; |
| import android.view.Display; |
| import android.view.WindowManagerPolicy; |
| |
| import java.io.PrintWriter; |
| |
| /** |
| * Controls the power state of the display. |
| * |
| * Handles the proximity sensor, light sensor, and animations between states |
| * including the screen off animation. |
| * |
| * This component acts independently of the rest of the power manager service. |
| * In particular, it does not share any state and it only communicates |
| * via asynchronous callbacks to inform the power manager that something has |
| * changed. |
| * |
| * Everything this class does internally is serialized on its handler although |
| * it may be accessed by other threads from the outside. |
| * |
| * Note that the power manager service guarantees that it will hold a suspend |
| * blocker as long as the display is not ready. So most of the work done here |
| * does not need to worry about holding a suspend blocker unless it happens |
| * independently of the display ready signal. |
| * |
| * For debugging, you can make the color fade and brightness animations run |
| * slower by changing the "animator duration scale" option in Development Settings. |
| */ |
| final class DisplayPowerController implements AutomaticBrightnessController.Callbacks { |
| private static final String TAG = "DisplayPowerController"; |
| private static final String SCREEN_ON_BLOCKED_TRACE_NAME = "Screen on blocked"; |
| |
| private static boolean DEBUG = false; |
| private static final boolean DEBUG_PRETEND_PROXIMITY_SENSOR_ABSENT = false; |
| |
| // If true, uses the color fade on animation. |
| // We might want to turn this off if we cannot get a guarantee that the screen |
| // actually turns on and starts showing new content after the call to set the |
| // screen state returns. Playing the animation can also be somewhat slow. |
| private static final boolean USE_COLOR_FADE_ON_ANIMATION = false; |
| |
| // The minimum reduction in brightness when dimmed. |
| private static final int SCREEN_DIM_MINIMUM_REDUCTION = 10; |
| |
| private static final int COLOR_FADE_ON_ANIMATION_DURATION_MILLIS = 250; |
| private static final int COLOR_FADE_OFF_ANIMATION_DURATION_MILLIS = 400; |
| |
| private static final int MSG_UPDATE_POWER_STATE = 1; |
| private static final int MSG_PROXIMITY_SENSOR_DEBOUNCED = 2; |
| private static final int MSG_SCREEN_ON_UNBLOCKED = 3; |
| |
| private static final int PROXIMITY_UNKNOWN = -1; |
| private static final int PROXIMITY_NEGATIVE = 0; |
| private static final int PROXIMITY_POSITIVE = 1; |
| |
| // Proximity sensor debounce delay in milliseconds for positive or negative transitions. |
| private static final int PROXIMITY_SENSOR_POSITIVE_DEBOUNCE_DELAY = 0; |
| private static final int PROXIMITY_SENSOR_NEGATIVE_DEBOUNCE_DELAY = 250; |
| |
| // Trigger proximity if distance is less than 5 cm. |
| private static final float TYPICAL_PROXIMITY_THRESHOLD = 5.0f; |
| |
| // Brightness animation ramp rate in brightness units per second. |
| private static final int BRIGHTNESS_RAMP_RATE_SLOW = 40; |
| |
| private static final int REPORTED_TO_POLICY_SCREEN_OFF = 0; |
| private static final int REPORTED_TO_POLICY_SCREEN_TURNING_ON = 1; |
| private static final int REPORTED_TO_POLICY_SCREEN_ON = 2; |
| |
| private final Object mLock = new Object(); |
| |
| private final Context mContext; |
| |
| // Our handler. |
| private final DisplayControllerHandler mHandler; |
| |
| // Asynchronous callbacks into the power manager service. |
| // Only invoked from the handler thread while no locks are held. |
| private final DisplayPowerCallbacks mCallbacks; |
| |
| // Battery stats. |
| private final IBatteryStats mBatteryStats; |
| |
| // The sensor manager. |
| private final SensorManager mSensorManager; |
| |
| // The window manager policy. |
| private final WindowManagerPolicy mWindowManagerPolicy; |
| |
| // The display blanker. |
| private final DisplayBlanker mBlanker; |
| |
| // The proximity sensor, or null if not available or needed. |
| private Sensor mProximitySensor; |
| |
| // The doze screen brightness. |
| private final int mScreenBrightnessDozeConfig; |
| |
| // The dim screen brightness. |
| private final int mScreenBrightnessDimConfig; |
| |
| // The minimum screen brightness to use in a very dark room. |
| private final int mScreenBrightnessDarkConfig; |
| |
| // The minimum allowed brightness. |
| private final int mScreenBrightnessRangeMinimum; |
| |
| // The maximum allowed brightness. |
| private final int mScreenBrightnessRangeMaximum; |
| |
| // True if auto-brightness should be used. |
| private boolean mUseSoftwareAutoBrightnessConfig; |
| |
| // True if should use light sensor to automatically determine doze screen brightness. |
| private final boolean mAllowAutoBrightnessWhileDozingConfig; |
| |
| // True if we should fade the screen while turning it off, false if we should play |
| // a stylish color fade animation instead. |
| private boolean mColorFadeFadesConfig; |
| |
| // The pending power request. |
| // Initially null until the first call to requestPowerState. |
| // Guarded by mLock. |
| private DisplayPowerRequest mPendingRequestLocked; |
| |
| // True if a request has been made to wait for the proximity sensor to go negative. |
| // Guarded by mLock. |
| private boolean mPendingWaitForNegativeProximityLocked; |
| |
| // True if the pending power request or wait for negative proximity flag |
| // has been changed since the last update occurred. |
| // Guarded by mLock. |
| private boolean mPendingRequestChangedLocked; |
| |
| // Set to true when the important parts of the pending power request have been applied. |
| // The important parts are mainly the screen state. Brightness changes may occur |
| // concurrently. |
| // Guarded by mLock. |
| private boolean mDisplayReadyLocked; |
| |
| // Set to true if a power state update is required. |
| // Guarded by mLock. |
| private boolean mPendingUpdatePowerStateLocked; |
| |
| /* The following state must only be accessed by the handler thread. */ |
| |
| // The currently requested power state. |
| // The power controller will progressively update its internal state to match |
| // the requested power state. Initially null until the first update. |
| private DisplayPowerRequest mPowerRequest; |
| |
| // The current power state. |
| // Must only be accessed on the handler thread. |
| private DisplayPowerState mPowerState; |
| |
| // True if the device should wait for negative proximity sensor before |
| // waking up the screen. This is set to false as soon as a negative |
| // proximity sensor measurement is observed or when the device is forced to |
| // go to sleep by the user. While true, the screen remains off. |
| private boolean mWaitingForNegativeProximity; |
| |
| // The actual proximity sensor threshold value. |
| private float mProximityThreshold; |
| |
| // Set to true if the proximity sensor listener has been registered |
| // with the sensor manager. |
| private boolean mProximitySensorEnabled; |
| |
| // The debounced proximity sensor state. |
| private int mProximity = PROXIMITY_UNKNOWN; |
| |
| // The raw non-debounced proximity sensor state. |
| private int mPendingProximity = PROXIMITY_UNKNOWN; |
| private long mPendingProximityDebounceTime = -1; // -1 if fully debounced |
| |
| // True if the screen was turned off because of the proximity sensor. |
| // When the screen turns on again, we report user activity to the power manager. |
| private boolean mScreenOffBecauseOfProximity; |
| |
| // The currently active screen on unblocker. This field is non-null whenever |
| // we are waiting for a callback to release it and unblock the screen. |
| private ScreenOnUnblocker mPendingScreenOnUnblocker; |
| |
| // True if we were in the process of turning off the screen. |
| // This allows us to recover more gracefully from situations where we abort |
| // turning off the screen. |
| private boolean mPendingScreenOff; |
| |
| // True if we have unfinished business and are holding a suspend blocker. |
| private boolean mUnfinishedBusiness; |
| |
| // The elapsed real time when the screen on was blocked. |
| private long mScreenOnBlockStartRealTime; |
| |
| // Screen state we reported to policy. Must be one of REPORTED_TO_POLICY_SCREEN_* fields. |
| private int mReportedScreenStateToPolicy; |
| |
| // Remembers whether certain kinds of brightness adjustments |
| // were recently applied so that we can decide how to transition. |
| private boolean mAppliedAutoBrightness; |
| private boolean mAppliedDimming; |
| private boolean mAppliedLowPower; |
| |
| // Brightness ramp rate fast. |
| private final int mBrightnessRampRateFast; |
| |
| // The controller for the automatic brightness level. |
| private AutomaticBrightnessController mAutomaticBrightnessController; |
| |
| // Animators. |
| private ObjectAnimator mColorFadeOnAnimator; |
| private ObjectAnimator mColorFadeOffAnimator; |
| private RampAnimator<DisplayPowerState> mScreenBrightnessRampAnimator; |
| |
| /** |
| * Creates the display power controller. |
| */ |
| public DisplayPowerController(Context context, |
| DisplayPowerCallbacks callbacks, Handler handler, |
| SensorManager sensorManager, DisplayBlanker blanker) { |
| mHandler = new DisplayControllerHandler(handler.getLooper()); |
| mCallbacks = callbacks; |
| |
| mBatteryStats = BatteryStatsService.getService(); |
| mSensorManager = sensorManager; |
| mWindowManagerPolicy = LocalServices.getService(WindowManagerPolicy.class); |
| mBlanker = blanker; |
| mContext = context; |
| |
| final Resources resources = context.getResources(); |
| final int screenBrightnessSettingMinimum = clampAbsoluteBrightness(resources.getInteger( |
| com.android.internal.R.integer.config_screenBrightnessSettingMinimum)); |
| |
| mScreenBrightnessDozeConfig = clampAbsoluteBrightness(resources.getInteger( |
| com.android.internal.R.integer.config_screenBrightnessDoze)); |
| |
| mScreenBrightnessDimConfig = clampAbsoluteBrightness(resources.getInteger( |
| com.android.internal.R.integer.config_screenBrightnessDim)); |
| |
| mScreenBrightnessDarkConfig = clampAbsoluteBrightness(resources.getInteger( |
| com.android.internal.R.integer.config_screenBrightnessDark)); |
| if (mScreenBrightnessDarkConfig > mScreenBrightnessDimConfig) { |
| Slog.w(TAG, "Expected config_screenBrightnessDark (" |
| + mScreenBrightnessDarkConfig + ") to be less than or equal to " |
| + "config_screenBrightnessDim (" + mScreenBrightnessDimConfig + ")."); |
| } |
| if (mScreenBrightnessDarkConfig > mScreenBrightnessDimConfig) { |
| Slog.w(TAG, "Expected config_screenBrightnessDark (" |
| + mScreenBrightnessDarkConfig + ") to be less than or equal to " |
| + "config_screenBrightnessSettingMinimum (" |
| + screenBrightnessSettingMinimum + ")."); |
| } |
| |
| int screenBrightnessRangeMinimum = Math.min(Math.min( |
| screenBrightnessSettingMinimum, mScreenBrightnessDimConfig), |
| mScreenBrightnessDarkConfig); |
| |
| mScreenBrightnessRangeMaximum = PowerManager.BRIGHTNESS_ON; |
| |
| mUseSoftwareAutoBrightnessConfig = resources.getBoolean( |
| com.android.internal.R.bool.config_automatic_brightness_available); |
| |
| mAllowAutoBrightnessWhileDozingConfig = resources.getBoolean( |
| com.android.internal.R.bool.config_allowAutoBrightnessWhileDozing); |
| |
| mBrightnessRampRateFast = resources.getInteger( |
| com.android.internal.R.integer.config_brightness_ramp_rate_fast); |
| |
| int lightSensorRate = resources.getInteger( |
| com.android.internal.R.integer.config_autoBrightnessLightSensorRate); |
| long brighteningLightDebounce = resources.getInteger( |
| com.android.internal.R.integer.config_autoBrightnessBrighteningLightDebounce); |
| long darkeningLightDebounce = resources.getInteger( |
| com.android.internal.R.integer.config_autoBrightnessDarkeningLightDebounce); |
| boolean autoBrightnessResetAmbientLuxAfterWarmUp = resources.getBoolean( |
| com.android.internal.R.bool.config_autoBrightnessResetAmbientLuxAfterWarmUp); |
| int ambientLightHorizon = resources.getInteger( |
| com.android.internal.R.integer.config_autoBrightnessAmbientLightHorizon); |
| float autoBrightnessAdjustmentMaxGamma = resources.getFraction( |
| com.android.internal.R.fraction.config_autoBrightnessAdjustmentMaxGamma, |
| 1, 1); |
| |
| if (mUseSoftwareAutoBrightnessConfig) { |
| int[] lux = resources.getIntArray( |
| com.android.internal.R.array.config_autoBrightnessLevels); |
| int[] screenBrightness = resources.getIntArray( |
| com.android.internal.R.array.config_autoBrightnessLcdBacklightValues); |
| int lightSensorWarmUpTimeConfig = resources.getInteger( |
| com.android.internal.R.integer.config_lightSensorWarmupTime); |
| final float dozeScaleFactor = resources.getFraction( |
| com.android.internal.R.fraction.config_screenAutoBrightnessDozeScaleFactor, |
| 1, 1); |
| |
| Spline screenAutoBrightnessSpline = createAutoBrightnessSpline(lux, screenBrightness); |
| if (screenAutoBrightnessSpline == null) { |
| Slog.e(TAG, "Error in config.xml. config_autoBrightnessLcdBacklightValues " |
| + "(size " + screenBrightness.length + ") " |
| + "must be monotic and have exactly one more entry than " |
| + "config_autoBrightnessLevels (size " + lux.length + ") " |
| + "which must be strictly increasing. " |
| + "Auto-brightness will be disabled."); |
| mUseSoftwareAutoBrightnessConfig = false; |
| } else { |
| int bottom = clampAbsoluteBrightness(screenBrightness[0]); |
| if (mScreenBrightnessDarkConfig > bottom) { |
| Slog.w(TAG, "config_screenBrightnessDark (" + mScreenBrightnessDarkConfig |
| + ") should be less than or equal to the first value of " |
| + "config_autoBrightnessLcdBacklightValues (" |
| + bottom + ")."); |
| } |
| if (bottom < screenBrightnessRangeMinimum) { |
| screenBrightnessRangeMinimum = bottom; |
| } |
| mAutomaticBrightnessController = new AutomaticBrightnessController(this, |
| handler.getLooper(), sensorManager, screenAutoBrightnessSpline, |
| lightSensorWarmUpTimeConfig, screenBrightnessRangeMinimum, |
| mScreenBrightnessRangeMaximum, dozeScaleFactor, lightSensorRate, |
| brighteningLightDebounce, darkeningLightDebounce, |
| autoBrightnessResetAmbientLuxAfterWarmUp, |
| ambientLightHorizon, autoBrightnessAdjustmentMaxGamma); |
| } |
| } |
| |
| mScreenBrightnessRangeMinimum = screenBrightnessRangeMinimum; |
| |
| mColorFadeFadesConfig = resources.getBoolean( |
| com.android.internal.R.bool.config_animateScreenLights); |
| |
| if (!DEBUG_PRETEND_PROXIMITY_SENSOR_ABSENT) { |
| mProximitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY); |
| if (mProximitySensor != null) { |
| mProximityThreshold = Math.min(mProximitySensor.getMaximumRange(), |
| TYPICAL_PROXIMITY_THRESHOLD); |
| } |
| } |
| |
| } |
| |
| /** |
| * Returns true if the proximity sensor screen-off function is available. |
| */ |
| public boolean isProximitySensorAvailable() { |
| return mProximitySensor != null; |
| } |
| |
| /** |
| * Requests a new power state. |
| * The controller makes a copy of the provided object and then |
| * begins adjusting the power state to match what was requested. |
| * |
| * @param request The requested power state. |
| * @param waitForNegativeProximity If true, issues a request to wait for |
| * negative proximity before turning the screen back on, assuming the screen |
| * was turned off by the proximity sensor. |
| * @return True if display is ready, false if there are important changes that must |
| * be made asynchronously (such as turning the screen on), in which case the caller |
| * should grab a wake lock, watch for {@link DisplayPowerCallbacks#onStateChanged()} |
| * then try the request again later until the state converges. |
| */ |
| public boolean requestPowerState(DisplayPowerRequest request, |
| boolean waitForNegativeProximity) { |
| if (DEBUG) { |
| Slog.d(TAG, "requestPowerState: " |
| + request + ", waitForNegativeProximity=" + waitForNegativeProximity); |
| } |
| |
| synchronized (mLock) { |
| boolean changed = false; |
| |
| if (waitForNegativeProximity |
| && !mPendingWaitForNegativeProximityLocked) { |
| mPendingWaitForNegativeProximityLocked = true; |
| changed = true; |
| } |
| |
| if (mPendingRequestLocked == null) { |
| mPendingRequestLocked = new DisplayPowerRequest(request); |
| changed = true; |
| } else if (!mPendingRequestLocked.equals(request)) { |
| mPendingRequestLocked.copyFrom(request); |
| changed = true; |
| } |
| |
| if (changed) { |
| mDisplayReadyLocked = false; |
| } |
| |
| if (changed && !mPendingRequestChangedLocked) { |
| mPendingRequestChangedLocked = true; |
| sendUpdatePowerStateLocked(); |
| } |
| |
| return mDisplayReadyLocked; |
| } |
| } |
| |
| private void sendUpdatePowerState() { |
| synchronized (mLock) { |
| sendUpdatePowerStateLocked(); |
| } |
| } |
| |
| private void sendUpdatePowerStateLocked() { |
| if (!mPendingUpdatePowerStateLocked) { |
| mPendingUpdatePowerStateLocked = true; |
| Message msg = mHandler.obtainMessage(MSG_UPDATE_POWER_STATE); |
| msg.setAsynchronous(true); |
| mHandler.sendMessage(msg); |
| } |
| } |
| |
| private void initialize() { |
| // Initialize the power state object for the default display. |
| // In the future, we might manage multiple displays independently. |
| mPowerState = new DisplayPowerState(mBlanker, |
| new ColorFade(Display.DEFAULT_DISPLAY)); |
| |
| mColorFadeOnAnimator = ObjectAnimator.ofFloat( |
| mPowerState, DisplayPowerState.COLOR_FADE_LEVEL, 0.0f, 1.0f); |
| mColorFadeOnAnimator.setDuration(COLOR_FADE_ON_ANIMATION_DURATION_MILLIS); |
| mColorFadeOnAnimator.addListener(mAnimatorListener); |
| |
| mColorFadeOffAnimator = ObjectAnimator.ofFloat( |
| mPowerState, DisplayPowerState.COLOR_FADE_LEVEL, 1.0f, 0.0f); |
| mColorFadeOffAnimator.setDuration(COLOR_FADE_OFF_ANIMATION_DURATION_MILLIS); |
| mColorFadeOffAnimator.addListener(mAnimatorListener); |
| |
| mScreenBrightnessRampAnimator = new RampAnimator<DisplayPowerState>( |
| mPowerState, DisplayPowerState.SCREEN_BRIGHTNESS); |
| mScreenBrightnessRampAnimator.setListener(mRampAnimatorListener); |
| |
| // Initialize screen state for battery stats. |
| try { |
| mBatteryStats.noteScreenState(mPowerState.getScreenState()); |
| mBatteryStats.noteScreenBrightness(mPowerState.getScreenBrightness()); |
| } catch (RemoteException ex) { |
| // same process |
| } |
| } |
| |
| private final Animator.AnimatorListener mAnimatorListener = new Animator.AnimatorListener() { |
| @Override |
| public void onAnimationStart(Animator animation) { |
| } |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| sendUpdatePowerState(); |
| } |
| @Override |
| public void onAnimationRepeat(Animator animation) { |
| } |
| @Override |
| public void onAnimationCancel(Animator animation) { |
| } |
| }; |
| |
| private final RampAnimator.Listener mRampAnimatorListener = new RampAnimator.Listener() { |
| @Override |
| public void onAnimationEnd() { |
| sendUpdatePowerState(); |
| } |
| }; |
| |
| private void updatePowerState() { |
| // Update the power state request. |
| final boolean mustNotify; |
| boolean mustInitialize = false; |
| boolean autoBrightnessAdjustmentChanged = false; |
| |
| synchronized (mLock) { |
| mPendingUpdatePowerStateLocked = false; |
| if (mPendingRequestLocked == null) { |
| return; // wait until first actual power request |
| } |
| |
| if (mPowerRequest == null) { |
| mPowerRequest = new DisplayPowerRequest(mPendingRequestLocked); |
| mWaitingForNegativeProximity = mPendingWaitForNegativeProximityLocked; |
| mPendingWaitForNegativeProximityLocked = false; |
| mPendingRequestChangedLocked = false; |
| mustInitialize = true; |
| } else if (mPendingRequestChangedLocked) { |
| autoBrightnessAdjustmentChanged = (mPowerRequest.screenAutoBrightnessAdjustment |
| != mPendingRequestLocked.screenAutoBrightnessAdjustment); |
| mPowerRequest.copyFrom(mPendingRequestLocked); |
| mWaitingForNegativeProximity |= mPendingWaitForNegativeProximityLocked; |
| mPendingWaitForNegativeProximityLocked = false; |
| mPendingRequestChangedLocked = false; |
| mDisplayReadyLocked = false; |
| } |
| |
| mustNotify = !mDisplayReadyLocked; |
| } |
| |
| // Initialize things the first time the power state is changed. |
| if (mustInitialize) { |
| initialize(); |
| } |
| |
| // Compute the basic display state using the policy. |
| // We might override this below based on other factors. |
| int state; |
| int brightness = PowerManager.BRIGHTNESS_DEFAULT; |
| boolean performScreenOffTransition = false; |
| switch (mPowerRequest.policy) { |
| case DisplayPowerRequest.POLICY_OFF: |
| state = Display.STATE_OFF; |
| performScreenOffTransition = true; |
| break; |
| case DisplayPowerRequest.POLICY_DOZE: |
| if (mPowerRequest.dozeScreenState != Display.STATE_UNKNOWN) { |
| state = mPowerRequest.dozeScreenState; |
| } else { |
| state = Display.STATE_DOZE; |
| } |
| if (!mAllowAutoBrightnessWhileDozingConfig) { |
| brightness = mPowerRequest.dozeScreenBrightness; |
| } |
| break; |
| case DisplayPowerRequest.POLICY_DIM: |
| case DisplayPowerRequest.POLICY_BRIGHT: |
| default: |
| state = Display.STATE_ON; |
| break; |
| } |
| assert(state != Display.STATE_UNKNOWN); |
| |
| // Apply the proximity sensor. |
| if (mProximitySensor != null) { |
| if (mPowerRequest.useProximitySensor && state != Display.STATE_OFF) { |
| setProximitySensorEnabled(true); |
| if (!mScreenOffBecauseOfProximity |
| && mProximity == PROXIMITY_POSITIVE) { |
| mScreenOffBecauseOfProximity = true; |
| sendOnProximityPositiveWithWakelock(); |
| } |
| } else if (mWaitingForNegativeProximity |
| && mScreenOffBecauseOfProximity |
| && mProximity == PROXIMITY_POSITIVE |
| && state != Display.STATE_OFF) { |
| setProximitySensorEnabled(true); |
| } else { |
| setProximitySensorEnabled(false); |
| mWaitingForNegativeProximity = false; |
| } |
| if (mScreenOffBecauseOfProximity |
| && mProximity != PROXIMITY_POSITIVE) { |
| mScreenOffBecauseOfProximity = false; |
| sendOnProximityNegativeWithWakelock(); |
| } |
| } else { |
| mWaitingForNegativeProximity = false; |
| } |
| if (mScreenOffBecauseOfProximity) { |
| state = Display.STATE_OFF; |
| } |
| |
| // Animate the screen state change unless already animating. |
| // The transition may be deferred, so after this point we will use the |
| // actual state instead of the desired one. |
| animateScreenStateChange(state, performScreenOffTransition); |
| state = mPowerState.getScreenState(); |
| |
| // Use zero brightness when screen is off. |
| if (state == Display.STATE_OFF) { |
| brightness = PowerManager.BRIGHTNESS_OFF; |
| } |
| |
| // Configure auto-brightness. |
| boolean autoBrightnessEnabled = false; |
| if (mAutomaticBrightnessController != null) { |
| final boolean autoBrightnessEnabledInDoze = mAllowAutoBrightnessWhileDozingConfig |
| && (state == Display.STATE_DOZE || state == Display.STATE_DOZE_SUSPEND); |
| autoBrightnessEnabled = mPowerRequest.useAutoBrightness |
| && (state == Display.STATE_ON || autoBrightnessEnabledInDoze) |
| && brightness < 0; |
| final boolean userInitiatedChange = autoBrightnessAdjustmentChanged |
| && mPowerRequest.brightnessSetByUser; |
| mAutomaticBrightnessController.configure(autoBrightnessEnabled, |
| mPowerRequest.screenAutoBrightnessAdjustment, state != Display.STATE_ON, |
| userInitiatedChange, mPowerRequest.useTwilight); |
| } |
| |
| // Apply brightness boost. |
| // We do this here after configuring auto-brightness so that we don't |
| // disable the light sensor during this temporary state. That way when |
| // boost ends we will be able to resume normal auto-brightness behavior |
| // without any delay. |
| if (mPowerRequest.boostScreenBrightness |
| && brightness != PowerManager.BRIGHTNESS_OFF) { |
| brightness = PowerManager.BRIGHTNESS_ON; |
| } |
| |
| // Apply auto-brightness. |
| boolean slowChange = false; |
| if (brightness < 0) { |
| if (autoBrightnessEnabled) { |
| brightness = mAutomaticBrightnessController.getAutomaticScreenBrightness(); |
| } |
| if (brightness >= 0) { |
| // Use current auto-brightness value and slowly adjust to changes. |
| brightness = clampScreenBrightness(brightness); |
| if (mAppliedAutoBrightness && !autoBrightnessAdjustmentChanged) { |
| slowChange = true; // slowly adapt to auto-brightness |
| } |
| mAppliedAutoBrightness = true; |
| } else { |
| mAppliedAutoBrightness = false; |
| } |
| } else { |
| mAppliedAutoBrightness = false; |
| } |
| |
| // Use default brightness when dozing unless overridden. |
| if (brightness < 0 && (state == Display.STATE_DOZE |
| || state == Display.STATE_DOZE_SUSPEND)) { |
| brightness = mScreenBrightnessDozeConfig; |
| } |
| |
| // Apply manual brightness. |
| // Use the current brightness setting from the request, which is expected |
| // provide a nominal default value for the case where auto-brightness |
| // is not ready yet. |
| if (brightness < 0) { |
| brightness = clampScreenBrightness(mPowerRequest.screenBrightness); |
| } |
| |
| // Apply dimming by at least some minimum amount when user activity |
| // timeout is about to expire. |
| if (mPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) { |
| if (brightness > mScreenBrightnessRangeMinimum) { |
| brightness = Math.max(Math.min(brightness - SCREEN_DIM_MINIMUM_REDUCTION, |
| mScreenBrightnessDimConfig), mScreenBrightnessRangeMinimum); |
| } |
| if (!mAppliedDimming) { |
| slowChange = false; |
| } |
| mAppliedDimming = true; |
| } else if (mAppliedDimming) { |
| slowChange = false; |
| mAppliedDimming = false; |
| } |
| |
| // If low power mode is enabled, cut the brightness level by half |
| // as long as it is above the minimum threshold. |
| if (mPowerRequest.lowPowerMode) { |
| if (brightness > mScreenBrightnessRangeMinimum) { |
| brightness = Math.max(brightness / 2, mScreenBrightnessRangeMinimum); |
| } |
| if (!mAppliedLowPower) { |
| slowChange = false; |
| } |
| mAppliedLowPower = true; |
| } else if (mAppliedLowPower) { |
| slowChange = false; |
| mAppliedLowPower = false; |
| } |
| |
| // Animate the screen brightness when the screen is on or dozing. |
| // Skip the animation when the screen is off or suspended. |
| if (!mPendingScreenOff) { |
| if (state == Display.STATE_ON || state == Display.STATE_DOZE) { |
| animateScreenBrightness(brightness, |
| slowChange ? BRIGHTNESS_RAMP_RATE_SLOW : mBrightnessRampRateFast); |
| } else { |
| animateScreenBrightness(brightness, 0); |
| } |
| } |
| |
| // Determine whether the display is ready for use in the newly requested state. |
| // Note that we do not wait for the brightness ramp animation to complete before |
| // reporting the display is ready because we only need to ensure the screen is in the |
| // right power state even as it continues to converge on the desired brightness. |
| final boolean ready = mPendingScreenOnUnblocker == null |
| && !mColorFadeOnAnimator.isStarted() |
| && !mColorFadeOffAnimator.isStarted() |
| && mPowerState.waitUntilClean(mCleanListener); |
| final boolean finished = ready |
| && !mScreenBrightnessRampAnimator.isAnimating(); |
| |
| // Notify policy about screen turned on. |
| if (ready && state != Display.STATE_OFF |
| && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_TURNING_ON) { |
| mReportedScreenStateToPolicy = REPORTED_TO_POLICY_SCREEN_ON; |
| mWindowManagerPolicy.screenTurnedOn(); |
| } |
| |
| // Grab a wake lock if we have unfinished business. |
| if (!finished && !mUnfinishedBusiness) { |
| if (DEBUG) { |
| Slog.d(TAG, "Unfinished business..."); |
| } |
| mCallbacks.acquireSuspendBlocker(); |
| mUnfinishedBusiness = true; |
| } |
| |
| // Notify the power manager when ready. |
| if (ready && mustNotify) { |
| // Send state change. |
| synchronized (mLock) { |
| if (!mPendingRequestChangedLocked) { |
| mDisplayReadyLocked = true; |
| |
| if (DEBUG) { |
| Slog.d(TAG, "Display ready!"); |
| } |
| } |
| } |
| sendOnStateChangedWithWakelock(); |
| } |
| |
| // Release the wake lock when we have no unfinished business. |
| if (finished && mUnfinishedBusiness) { |
| if (DEBUG) { |
| Slog.d(TAG, "Finished business..."); |
| } |
| mUnfinishedBusiness = false; |
| mCallbacks.releaseSuspendBlocker(); |
| } |
| } |
| |
| @Override |
| public void updateBrightness() { |
| sendUpdatePowerState(); |
| } |
| |
| private void blockScreenOn() { |
| if (mPendingScreenOnUnblocker == null) { |
| Trace.asyncTraceBegin(Trace.TRACE_TAG_POWER, SCREEN_ON_BLOCKED_TRACE_NAME, 0); |
| mPendingScreenOnUnblocker = new ScreenOnUnblocker(); |
| mScreenOnBlockStartRealTime = SystemClock.elapsedRealtime(); |
| Slog.i(TAG, "Blocking screen on until initial contents have been drawn."); |
| } |
| } |
| |
| private void unblockScreenOn() { |
| if (mPendingScreenOnUnblocker != null) { |
| mPendingScreenOnUnblocker = null; |
| long delay = SystemClock.elapsedRealtime() - mScreenOnBlockStartRealTime; |
| Slog.i(TAG, "Unblocked screen on after " + delay + " ms"); |
| Trace.asyncTraceEnd(Trace.TRACE_TAG_POWER, SCREEN_ON_BLOCKED_TRACE_NAME, 0); |
| } |
| } |
| |
| private boolean setScreenState(int state) { |
| if (mPowerState.getScreenState() != state) { |
| final boolean wasOn = (mPowerState.getScreenState() != Display.STATE_OFF); |
| mPowerState.setScreenState(state); |
| |
| // Tell battery stats about the transition. |
| try { |
| mBatteryStats.noteScreenState(state); |
| } catch (RemoteException ex) { |
| // same process |
| } |
| } |
| |
| // Tell the window manager policy when the screen is turned off or on unless it's due |
| // to the proximity sensor. We temporarily block turning the screen on until the |
| // window manager is ready by leaving a black surface covering the screen. |
| // This surface is essentially the final state of the color fade animation and |
| // it is only removed once the window manager tells us that the activity has |
| // finished drawing underneath. |
| final boolean isOff = (state == Display.STATE_OFF); |
| if (isOff && mReportedScreenStateToPolicy != REPORTED_TO_POLICY_SCREEN_OFF |
| && !mScreenOffBecauseOfProximity) { |
| mReportedScreenStateToPolicy = REPORTED_TO_POLICY_SCREEN_OFF; |
| unblockScreenOn(); |
| mWindowManagerPolicy.screenTurnedOff(); |
| } else if (!isOff && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_OFF) { |
| mReportedScreenStateToPolicy = REPORTED_TO_POLICY_SCREEN_TURNING_ON; |
| if (mPowerState.getColorFadeLevel() == 0.0f) { |
| blockScreenOn(); |
| } else { |
| unblockScreenOn(); |
| } |
| mWindowManagerPolicy.screenTurningOn(mPendingScreenOnUnblocker); |
| } |
| |
| // Return true if the screen isn't blocked. |
| return mPendingScreenOnUnblocker == null; |
| } |
| |
| private int clampScreenBrightness(int value) { |
| return MathUtils.constrain( |
| value, mScreenBrightnessRangeMinimum, mScreenBrightnessRangeMaximum); |
| } |
| |
| private void animateScreenBrightness(int target, int rate) { |
| if (DEBUG) { |
| Slog.d(TAG, "Animating brightness: target=" + target +", rate=" + rate); |
| } |
| if (mScreenBrightnessRampAnimator.animateTo(target, rate)) { |
| try { |
| mBatteryStats.noteScreenBrightness(target); |
| } catch (RemoteException ex) { |
| // same process |
| } |
| } |
| } |
| |
| private void animateScreenStateChange(int target, boolean performScreenOffTransition) { |
| // If there is already an animation in progress, don't interfere with it. |
| if (mColorFadeOnAnimator.isStarted() |
| || mColorFadeOffAnimator.isStarted()) { |
| if (target != Display.STATE_ON) { |
| return; |
| } |
| // If display state changed to on, proceed and stop the color fade and turn screen on. |
| mPendingScreenOff = false; |
| } |
| |
| // If we were in the process of turning off the screen but didn't quite |
| // finish. Then finish up now to prevent a jarring transition back |
| // to screen on if we skipped blocking screen on as usual. |
| if (mPendingScreenOff && target != Display.STATE_OFF) { |
| setScreenState(Display.STATE_OFF); |
| mPendingScreenOff = false; |
| mPowerState.dismissColorFadeResources(); |
| } |
| |
| if (target == Display.STATE_ON) { |
| // Want screen on. The contents of the screen may not yet |
| // be visible if the color fade has not been dismissed because |
| // its last frame of animation is solid black. |
| if (!setScreenState(Display.STATE_ON)) { |
| return; // screen on blocked |
| } |
| if (USE_COLOR_FADE_ON_ANIMATION && mPowerRequest.isBrightOrDim()) { |
| // Perform screen on animation. |
| if (mPowerState.getColorFadeLevel() == 1.0f) { |
| mPowerState.dismissColorFade(); |
| } else if (mPowerState.prepareColorFade(mContext, |
| mColorFadeFadesConfig ? |
| ColorFade.MODE_FADE : |
| ColorFade.MODE_WARM_UP)) { |
| mColorFadeOnAnimator.start(); |
| } else { |
| mColorFadeOnAnimator.end(); |
| } |
| } else { |
| // Skip screen on animation. |
| mPowerState.setColorFadeLevel(1.0f); |
| mPowerState.dismissColorFade(); |
| } |
| } else if (target == Display.STATE_DOZE) { |
| // Want screen dozing. |
| // Wait for brightness animation to complete beforehand when entering doze |
| // from screen on to prevent a perceptible jump because brightness may operate |
| // differently when the display is configured for dozing. |
| if (mScreenBrightnessRampAnimator.isAnimating() |
| && mPowerState.getScreenState() == Display.STATE_ON) { |
| return; |
| } |
| |
| // Set screen state. |
| if (!setScreenState(Display.STATE_DOZE)) { |
| return; // screen on blocked |
| } |
| |
| // Dismiss the black surface without fanfare. |
| mPowerState.setColorFadeLevel(1.0f); |
| mPowerState.dismissColorFade(); |
| } else if (target == Display.STATE_DOZE_SUSPEND) { |
| // Want screen dozing and suspended. |
| // Wait for brightness animation to complete beforehand unless already |
| // suspended because we may not be able to change it after suspension. |
| if (mScreenBrightnessRampAnimator.isAnimating() |
| && mPowerState.getScreenState() != Display.STATE_DOZE_SUSPEND) { |
| return; |
| } |
| |
| // If not already suspending, temporarily set the state to doze until the |
| // screen on is unblocked, then suspend. |
| if (mPowerState.getScreenState() != Display.STATE_DOZE_SUSPEND) { |
| if (!setScreenState(Display.STATE_DOZE)) { |
| return; // screen on blocked |
| } |
| setScreenState(Display.STATE_DOZE_SUSPEND); // already on so can't block |
| } |
| |
| // Dismiss the black surface without fanfare. |
| mPowerState.setColorFadeLevel(1.0f); |
| mPowerState.dismissColorFade(); |
| } else { |
| // Want screen off. |
| mPendingScreenOff = true; |
| if (mPowerState.getColorFadeLevel() == 0.0f) { |
| // Turn the screen off. |
| // A black surface is already hiding the contents of the screen. |
| setScreenState(Display.STATE_OFF); |
| mPendingScreenOff = false; |
| mPowerState.dismissColorFadeResources(); |
| } else if (performScreenOffTransition |
| && mPowerState.prepareColorFade(mContext, |
| mColorFadeFadesConfig ? |
| ColorFade.MODE_FADE : ColorFade.MODE_COOL_DOWN) |
| && mPowerState.getScreenState() != Display.STATE_OFF) { |
| // Perform the screen off animation. |
| mColorFadeOffAnimator.start(); |
| } else { |
| // Skip the screen off animation and add a black surface to hide the |
| // contents of the screen. |
| mColorFadeOffAnimator.end(); |
| } |
| } |
| } |
| |
| private final Runnable mCleanListener = new Runnable() { |
| @Override |
| public void run() { |
| sendUpdatePowerState(); |
| } |
| }; |
| |
| private void setProximitySensorEnabled(boolean enable) { |
| if (enable) { |
| if (!mProximitySensorEnabled) { |
| // Register the listener. |
| // Proximity sensor state already cleared initially. |
| mProximitySensorEnabled = true; |
| mSensorManager.registerListener(mProximitySensorListener, mProximitySensor, |
| SensorManager.SENSOR_DELAY_NORMAL, mHandler); |
| } |
| } else { |
| if (mProximitySensorEnabled) { |
| // Unregister the listener. |
| // Clear the proximity sensor state for next time. |
| mProximitySensorEnabled = false; |
| mProximity = PROXIMITY_UNKNOWN; |
| mPendingProximity = PROXIMITY_UNKNOWN; |
| mHandler.removeMessages(MSG_PROXIMITY_SENSOR_DEBOUNCED); |
| mSensorManager.unregisterListener(mProximitySensorListener); |
| clearPendingProximityDebounceTime(); // release wake lock (must be last) |
| } |
| } |
| } |
| |
| private void handleProximitySensorEvent(long time, boolean positive) { |
| if (mProximitySensorEnabled) { |
| if (mPendingProximity == PROXIMITY_NEGATIVE && !positive) { |
| return; // no change |
| } |
| if (mPendingProximity == PROXIMITY_POSITIVE && positive) { |
| return; // no change |
| } |
| |
| // Only accept a proximity sensor reading if it remains |
| // stable for the entire debounce delay. We hold a wake lock while |
| // debouncing the sensor. |
| mHandler.removeMessages(MSG_PROXIMITY_SENSOR_DEBOUNCED); |
| if (positive) { |
| mPendingProximity = PROXIMITY_POSITIVE; |
| setPendingProximityDebounceTime( |
| time + PROXIMITY_SENSOR_POSITIVE_DEBOUNCE_DELAY); // acquire wake lock |
| } else { |
| mPendingProximity = PROXIMITY_NEGATIVE; |
| setPendingProximityDebounceTime( |
| time + PROXIMITY_SENSOR_NEGATIVE_DEBOUNCE_DELAY); // acquire wake lock |
| } |
| |
| // Debounce the new sensor reading. |
| debounceProximitySensor(); |
| } |
| } |
| |
| private void debounceProximitySensor() { |
| if (mProximitySensorEnabled |
| && mPendingProximity != PROXIMITY_UNKNOWN |
| && mPendingProximityDebounceTime >= 0) { |
| final long now = SystemClock.uptimeMillis(); |
| if (mPendingProximityDebounceTime <= now) { |
| // Sensor reading accepted. Apply the change then release the wake lock. |
| mProximity = mPendingProximity; |
| updatePowerState(); |
| clearPendingProximityDebounceTime(); // release wake lock (must be last) |
| } else { |
| // Need to wait a little longer. |
| // Debounce again later. We continue holding a wake lock while waiting. |
| Message msg = mHandler.obtainMessage(MSG_PROXIMITY_SENSOR_DEBOUNCED); |
| msg.setAsynchronous(true); |
| mHandler.sendMessageAtTime(msg, mPendingProximityDebounceTime); |
| } |
| } |
| } |
| |
| private void clearPendingProximityDebounceTime() { |
| if (mPendingProximityDebounceTime >= 0) { |
| mPendingProximityDebounceTime = -1; |
| mCallbacks.releaseSuspendBlocker(); // release wake lock |
| } |
| } |
| |
| private void setPendingProximityDebounceTime(long debounceTime) { |
| if (mPendingProximityDebounceTime < 0) { |
| mCallbacks.acquireSuspendBlocker(); // acquire wake lock |
| } |
| mPendingProximityDebounceTime = debounceTime; |
| } |
| |
| private void sendOnStateChangedWithWakelock() { |
| mCallbacks.acquireSuspendBlocker(); |
| mHandler.post(mOnStateChangedRunnable); |
| } |
| |
| private final Runnable mOnStateChangedRunnable = new Runnable() { |
| @Override |
| public void run() { |
| mCallbacks.onStateChanged(); |
| mCallbacks.releaseSuspendBlocker(); |
| } |
| }; |
| |
| private void sendOnProximityPositiveWithWakelock() { |
| mCallbacks.acquireSuspendBlocker(); |
| mHandler.post(mOnProximityPositiveRunnable); |
| } |
| |
| private final Runnable mOnProximityPositiveRunnable = new Runnable() { |
| @Override |
| public void run() { |
| mCallbacks.onProximityPositive(); |
| mCallbacks.releaseSuspendBlocker(); |
| } |
| }; |
| |
| private void sendOnProximityNegativeWithWakelock() { |
| mCallbacks.acquireSuspendBlocker(); |
| mHandler.post(mOnProximityNegativeRunnable); |
| } |
| |
| private final Runnable mOnProximityNegativeRunnable = new Runnable() { |
| @Override |
| public void run() { |
| mCallbacks.onProximityNegative(); |
| mCallbacks.releaseSuspendBlocker(); |
| } |
| }; |
| |
| public void dump(final PrintWriter pw) { |
| synchronized (mLock) { |
| pw.println(); |
| pw.println("Display Power Controller Locked State:"); |
| pw.println(" mDisplayReadyLocked=" + mDisplayReadyLocked); |
| pw.println(" mPendingRequestLocked=" + mPendingRequestLocked); |
| pw.println(" mPendingRequestChangedLocked=" + mPendingRequestChangedLocked); |
| pw.println(" mPendingWaitForNegativeProximityLocked=" |
| + mPendingWaitForNegativeProximityLocked); |
| pw.println(" mPendingUpdatePowerStateLocked=" + mPendingUpdatePowerStateLocked); |
| } |
| |
| pw.println(); |
| pw.println("Display Power Controller Configuration:"); |
| pw.println(" mScreenBrightnessDozeConfig=" + mScreenBrightnessDozeConfig); |
| pw.println(" mScreenBrightnessDimConfig=" + mScreenBrightnessDimConfig); |
| pw.println(" mScreenBrightnessDarkConfig=" + mScreenBrightnessDarkConfig); |
| pw.println(" mScreenBrightnessRangeMinimum=" + mScreenBrightnessRangeMinimum); |
| pw.println(" mScreenBrightnessRangeMaximum=" + mScreenBrightnessRangeMaximum); |
| pw.println(" mUseSoftwareAutoBrightnessConfig=" + mUseSoftwareAutoBrightnessConfig); |
| pw.println(" mAllowAutoBrightnessWhileDozingConfig=" + |
| mAllowAutoBrightnessWhileDozingConfig); |
| pw.println(" mColorFadeFadesConfig=" + mColorFadeFadesConfig); |
| |
| mHandler.runWithScissors(new Runnable() { |
| @Override |
| public void run() { |
| dumpLocal(pw); |
| } |
| }, 1000); |
| } |
| |
| private void dumpLocal(PrintWriter pw) { |
| pw.println(); |
| pw.println("Display Power Controller Thread State:"); |
| pw.println(" mPowerRequest=" + mPowerRequest); |
| pw.println(" mWaitingForNegativeProximity=" + mWaitingForNegativeProximity); |
| |
| pw.println(" mProximitySensor=" + mProximitySensor); |
| pw.println(" mProximitySensorEnabled=" + mProximitySensorEnabled); |
| pw.println(" mProximityThreshold=" + mProximityThreshold); |
| pw.println(" mProximity=" + proximityToString(mProximity)); |
| pw.println(" mPendingProximity=" + proximityToString(mPendingProximity)); |
| pw.println(" mPendingProximityDebounceTime=" |
| + TimeUtils.formatUptime(mPendingProximityDebounceTime)); |
| pw.println(" mScreenOffBecauseOfProximity=" + mScreenOffBecauseOfProximity); |
| pw.println(" mAppliedAutoBrightness=" + mAppliedAutoBrightness); |
| pw.println(" mAppliedDimming=" + mAppliedDimming); |
| pw.println(" mAppliedLowPower=" + mAppliedLowPower); |
| pw.println(" mPendingScreenOnUnblocker=" + mPendingScreenOnUnblocker); |
| pw.println(" mPendingScreenOff=" + mPendingScreenOff); |
| pw.println(" mReportedToPolicy=" + reportedToPolicyToString(mReportedScreenStateToPolicy)); |
| |
| pw.println(" mScreenBrightnessRampAnimator.isAnimating()=" + |
| mScreenBrightnessRampAnimator.isAnimating()); |
| |
| if (mColorFadeOnAnimator != null) { |
| pw.println(" mColorFadeOnAnimator.isStarted()=" + |
| mColorFadeOnAnimator.isStarted()); |
| } |
| if (mColorFadeOffAnimator != null) { |
| pw.println(" mColorFadeOffAnimator.isStarted()=" + |
| mColorFadeOffAnimator.isStarted()); |
| } |
| |
| if (mPowerState != null) { |
| mPowerState.dump(pw); |
| } |
| |
| if (mAutomaticBrightnessController != null) { |
| mAutomaticBrightnessController.dump(pw); |
| } |
| |
| } |
| |
| private static String proximityToString(int state) { |
| switch (state) { |
| case PROXIMITY_UNKNOWN: |
| return "Unknown"; |
| case PROXIMITY_NEGATIVE: |
| return "Negative"; |
| case PROXIMITY_POSITIVE: |
| return "Positive"; |
| default: |
| return Integer.toString(state); |
| } |
| } |
| |
| private static String reportedToPolicyToString(int state) { |
| switch (state) { |
| case REPORTED_TO_POLICY_SCREEN_OFF: |
| return "REPORTED_TO_POLICY_SCREEN_OFF"; |
| case REPORTED_TO_POLICY_SCREEN_TURNING_ON: |
| return "REPORTED_TO_POLICY_SCREEN_TURNING_ON"; |
| case REPORTED_TO_POLICY_SCREEN_ON: |
| return "REPORTED_TO_POLICY_SCREEN_ON"; |
| default: |
| return Integer.toString(state); |
| } |
| } |
| |
| private static Spline createAutoBrightnessSpline(int[] lux, int[] brightness) { |
| if (lux == null || lux.length == 0 || brightness == null || brightness.length == 0) { |
| Slog.e(TAG, "Could not create auto-brightness spline."); |
| return null; |
| } |
| try { |
| final int n = brightness.length; |
| float[] x = new float[n]; |
| float[] y = new float[n]; |
| y[0] = normalizeAbsoluteBrightness(brightness[0]); |
| for (int i = 1; i < n; i++) { |
| x[i] = lux[i - 1]; |
| y[i] = normalizeAbsoluteBrightness(brightness[i]); |
| } |
| |
| Spline spline = Spline.createSpline(x, y); |
| if (DEBUG) { |
| Slog.d(TAG, "Auto-brightness spline: " + spline); |
| for (float v = 1f; v < lux[lux.length - 1] * 1.25f; v *= 1.25f) { |
| Slog.d(TAG, String.format(" %7.1f: %7.1f", v, spline.interpolate(v))); |
| } |
| } |
| return spline; |
| } catch (IllegalArgumentException ex) { |
| Slog.e(TAG, "Could not create auto-brightness spline.", ex); |
| return null; |
| } |
| } |
| |
| private static float normalizeAbsoluteBrightness(int value) { |
| return (float)clampAbsoluteBrightness(value) / PowerManager.BRIGHTNESS_ON; |
| } |
| |
| private static int clampAbsoluteBrightness(int value) { |
| return MathUtils.constrain(value, PowerManager.BRIGHTNESS_OFF, PowerManager.BRIGHTNESS_ON); |
| } |
| |
| private final class DisplayControllerHandler extends Handler { |
| public DisplayControllerHandler(Looper looper) { |
| super(looper, null, true /*async*/); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_UPDATE_POWER_STATE: |
| updatePowerState(); |
| break; |
| |
| case MSG_PROXIMITY_SENSOR_DEBOUNCED: |
| debounceProximitySensor(); |
| break; |
| |
| case MSG_SCREEN_ON_UNBLOCKED: |
| if (mPendingScreenOnUnblocker == msg.obj) { |
| unblockScreenOn(); |
| updatePowerState(); |
| } |
| break; |
| } |
| } |
| } |
| |
| private final SensorEventListener mProximitySensorListener = new SensorEventListener() { |
| @Override |
| public void onSensorChanged(SensorEvent event) { |
| if (mProximitySensorEnabled) { |
| final long time = SystemClock.uptimeMillis(); |
| final float distance = event.values[0]; |
| boolean positive = distance >= 0.0f && distance < mProximityThreshold; |
| handleProximitySensorEvent(time, positive); |
| } |
| } |
| |
| @Override |
| public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| // Not used. |
| } |
| }; |
| |
| private final class ScreenOnUnblocker implements WindowManagerPolicy.ScreenOnListener { |
| @Override |
| public void onScreenOn() { |
| Message msg = mHandler.obtainMessage(MSG_SCREEN_ON_UNBLOCKED, this); |
| msg.setAsynchronous(true); |
| mHandler.sendMessage(msg); |
| } |
| } |
| } |
