Michael Wright | a3dab23 | 2019-02-22 16:54:21 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.display; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.annotation.Nullable; |
| 21 | import android.content.ContentResolver; |
| 22 | import android.content.Context; |
| 23 | import android.database.ContentObserver; |
| 24 | import android.hardware.display.DisplayManager; |
| 25 | import android.net.Uri; |
| 26 | import android.os.Handler; |
| 27 | import android.os.Looper; |
| 28 | import android.os.Message; |
| 29 | import android.os.UserHandle; |
| 30 | import android.provider.Settings; |
| 31 | import android.util.Slog; |
| 32 | import android.util.SparseArray; |
| 33 | import android.view.Display; |
| 34 | import android.view.DisplayInfo; |
| 35 | |
| 36 | import com.android.internal.R; |
| 37 | |
| 38 | import java.io.PrintWriter; |
| 39 | import java.util.ArrayList; |
| 40 | import java.util.Arrays; |
| 41 | import java.util.Objects; |
| 42 | |
| 43 | /** |
| 44 | * The DisplayModeDirector is responsible for determining what modes are allowed to be |
| 45 | * automatically picked by the system based on system-wide and display-specific configuration. |
| 46 | */ |
| 47 | public class DisplayModeDirector { |
| 48 | private static final String TAG = "DisplayModeDirector"; |
| 49 | private static final boolean DEBUG = false; |
| 50 | |
| 51 | private static final int MSG_ALLOWED_MODES_CHANGED = 1; |
| 52 | |
| 53 | // Special ID used to indicate that given vote is to be applied globally, rather than to a |
| 54 | // specific display. |
| 55 | private static final int GLOBAL_ID = -1; |
| 56 | |
| 57 | // What we consider to be the system's "default" refresh rate. |
| 58 | private static final float DEFAULT_REFRESH_RATE = 60f; |
| 59 | |
| 60 | // The tolerance within which we consider something approximately equals. |
| 61 | private static final float EPSILON = 0.001f; |
| 62 | |
| 63 | private final Object mLock = new Object(); |
| 64 | private final Context mContext; |
| 65 | |
| 66 | private final DisplayModeDirectorHandler mHandler; |
| 67 | |
| 68 | // A map from the display ID to the collection of votes and their priority. The latter takes |
| 69 | // the form of another map from the priority to the vote itself so that each priority is |
| 70 | // guaranteed to have exactly one vote, which is also easily and efficiently replaceable. |
| 71 | private final SparseArray<SparseArray<Vote>> mVotesByDisplay; |
| 72 | // A map from the display ID to the supported modes on that display. |
| 73 | private final SparseArray<Display.Mode[]> mSupportedModesByDisplay; |
| 74 | // A map from the display ID to the default mode of that display. |
| 75 | private final SparseArray<Display.Mode> mDefaultModeByDisplay; |
| 76 | |
| 77 | private final AppRequestObserver mAppRequestObserver; |
| 78 | private final SettingsObserver mSettingsObserver; |
| 79 | private final DisplayObserver mDisplayObserver; |
| 80 | |
| 81 | |
| 82 | private Listener mListener; |
| 83 | |
| 84 | public DisplayModeDirector(@NonNull Context context, @NonNull Handler handler) { |
| 85 | mContext = context; |
| 86 | mHandler = new DisplayModeDirectorHandler(handler.getLooper()); |
| 87 | mVotesByDisplay = new SparseArray<>(); |
| 88 | mSupportedModesByDisplay = new SparseArray<>(); |
| 89 | mDefaultModeByDisplay = new SparseArray<>(); |
| 90 | mAppRequestObserver = new AppRequestObserver(); |
| 91 | mSettingsObserver = new SettingsObserver(context, handler); |
| 92 | mDisplayObserver = new DisplayObserver(context, handler); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Tells the DisplayModeDirector to update allowed votes and begin observing relevant system |
| 97 | * state. |
| 98 | * |
| 99 | * This has to be deferred because the object may be constructed before the rest of the system |
| 100 | * is ready. |
| 101 | */ |
| 102 | public void start() { |
| 103 | mSettingsObserver.observe(); |
| 104 | mDisplayObserver.observe(); |
| 105 | mSettingsObserver.observe(); |
| 106 | synchronized (mLock) { |
| 107 | // We may have a listener already registered before the call to start, so go ahead and |
| 108 | // notify them to pick up our newly initialized state. |
| 109 | notifyAllowedModesChangedLocked(); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Calculates the modes the system is allowed to freely switch between based on global and |
| 115 | * display-specific constraints. |
| 116 | * |
| 117 | * @param displayId The display to query for. |
| 118 | * @return The IDs of the modes the system is allowed to freely switch between. |
| 119 | */ |
| 120 | @NonNull |
| 121 | public int[] getAllowedModes(int displayId) { |
| 122 | synchronized (mLock) { |
| 123 | SparseArray<Vote> votes = getVotesLocked(displayId); |
| 124 | Display.Mode[] modes = mSupportedModesByDisplay.get(displayId); |
| 125 | Display.Mode defaultMode = mDefaultModeByDisplay.get(displayId); |
| 126 | if (modes == null || defaultMode == null) { |
| 127 | Slog.e(TAG, "Asked about unknown display, returning empty allowed set! (id=" |
| 128 | + displayId + ")"); |
| 129 | return new int[0]; |
| 130 | } |
| 131 | return getAllowedModesLocked(votes, modes, defaultMode); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | @NonNull |
| 136 | private SparseArray<Vote> getVotesLocked(int displayId) { |
| 137 | SparseArray<Vote> displayVotes = mVotesByDisplay.get(displayId); |
| 138 | final SparseArray<Vote> votes; |
| 139 | if (displayVotes != null) { |
| 140 | votes = displayVotes.clone(); |
| 141 | } else { |
| 142 | votes = new SparseArray<>(); |
| 143 | } |
| 144 | |
| 145 | SparseArray<Vote> globalVotes = mVotesByDisplay.get(GLOBAL_ID); |
| 146 | if (globalVotes != null) { |
| 147 | for (int i = 0; i < globalVotes.size(); i++) { |
| 148 | int priority = globalVotes.keyAt(i); |
| 149 | if (votes.indexOfKey(priority) < 0) { |
| 150 | votes.put(priority, globalVotes.valueAt(i)); |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | return votes; |
| 155 | } |
| 156 | |
| 157 | @NonNull |
| 158 | private int[] getAllowedModesLocked(@NonNull SparseArray<Vote> votes, |
| 159 | @NonNull Display.Mode[] modes, @NonNull Display.Mode defaultMode) { |
| 160 | int lowestConsideredPriority = Vote.MIN_PRIORITY; |
| 161 | while (lowestConsideredPriority <= Vote.MAX_PRIORITY) { |
| 162 | float minRefreshRate = 0f; |
| 163 | float maxRefreshRate = Float.POSITIVE_INFINITY; |
| 164 | int height = Vote.INVALID_SIZE; |
| 165 | int width = Vote.INVALID_SIZE; |
| 166 | |
| 167 | for (int priority = Vote.MAX_PRIORITY; |
| 168 | priority >= lowestConsideredPriority; |
| 169 | priority--) { |
| 170 | Vote vote = votes.get(priority); |
| 171 | if (vote == null) { |
| 172 | continue; |
| 173 | } |
| 174 | // For refresh rates, just use the tightest bounds of all the votes |
| 175 | minRefreshRate = Math.max(minRefreshRate, vote.minRefreshRate); |
| 176 | maxRefreshRate = Math.min(maxRefreshRate, vote.maxRefreshRate); |
| 177 | // For display size, use only the first vote we come across (i.e. the highest |
| 178 | // priority vote that includes the width / height). |
| 179 | if (height == Vote.INVALID_SIZE && width == Vote.INVALID_SIZE |
| 180 | && vote.height > 0 && vote.width > 0) { |
| 181 | width = vote.width; |
| 182 | height = vote.height; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | // If we don't have anything specifying the width / height of the display, just use the |
| 187 | // default width and height. We don't want these switching out from underneath us since |
| 188 | // it's a pretty disruptive behavior. |
| 189 | if (height == Vote.INVALID_SIZE || width == Vote.INVALID_SIZE) { |
| 190 | width = defaultMode.getPhysicalWidth(); |
| 191 | height = defaultMode.getPhysicalHeight(); |
| 192 | } |
| 193 | |
| 194 | int[] availableModes = |
| 195 | filterModes(modes, width, height, minRefreshRate, maxRefreshRate); |
| 196 | if (availableModes.length > 0) { |
| 197 | if (DEBUG) { |
| 198 | Slog.w(TAG, "Found available modes=" + Arrays.toString(availableModes) |
| 199 | + " with lowest priority considered " |
| 200 | + Vote.priorityToString(lowestConsideredPriority) |
| 201 | + " and constraints: " |
| 202 | + "width=" + width |
| 203 | + ", height=" + height |
| 204 | + ", minRefreshRate=" + minRefreshRate |
| 205 | + ", maxRefreshRate=" + maxRefreshRate); |
| 206 | } |
| 207 | return availableModes; |
| 208 | } |
| 209 | |
| 210 | if (DEBUG) { |
| 211 | Slog.w(TAG, "Couldn't find available modes with lowest priority set to " |
| 212 | + Vote.priorityToString(lowestConsideredPriority) |
| 213 | + " and with the following constraints: " |
| 214 | + "width=" + width |
| 215 | + ", height=" + height |
| 216 | + ", minRefreshRate=" + minRefreshRate |
| 217 | + ", maxRefreshRate=" + maxRefreshRate); |
| 218 | } |
| 219 | // If we haven't found anything with the current set of votes, drop the current lowest |
| 220 | // priority vote. |
| 221 | lowestConsideredPriority++; |
| 222 | } |
| 223 | |
| 224 | // If we still haven't found anything that matches our current set of votes, just fall back |
| 225 | // to the default mode. |
| 226 | return new int[] { defaultMode.getModeId() }; |
| 227 | } |
| 228 | |
| 229 | private int[] filterModes(Display.Mode[] supportedModes, |
| 230 | int width, int height, float minRefreshRate, float maxRefreshRate) { |
| 231 | ArrayList<Display.Mode> availableModes = new ArrayList<>(); |
| 232 | for (Display.Mode mode : supportedModes) { |
| 233 | if (mode.getPhysicalWidth() != width || mode.getPhysicalHeight() != height) { |
| 234 | if (DEBUG) { |
| 235 | Slog.w(TAG, "Discarding mode " + mode.getModeId() + ", wrong size" |
| 236 | + ": desiredWidth=" + width |
| 237 | + ": desiredHeight=" + height |
| 238 | + ": actualWidth=" + mode.getPhysicalWidth() |
| 239 | + ": actualHeight=" + mode.getPhysicalHeight()); |
| 240 | } |
| 241 | continue; |
| 242 | } |
| 243 | final float refreshRate = mode.getRefreshRate(); |
| 244 | // Some refresh rates are calculated based on frame timings, so they aren't *exactly* |
| 245 | // equal to expected refresh rate. Given that, we apply a bit of tolerance to this |
| 246 | // comparison. |
| 247 | if (refreshRate < (minRefreshRate - EPSILON) |
| 248 | || refreshRate > (maxRefreshRate + EPSILON)) { |
| 249 | if (DEBUG) { |
| 250 | Slog.w(TAG, "Discarding mode " + mode.getModeId() |
| 251 | + ", outside refresh rate bounds" |
| 252 | + ": minRefreshRate=" + minRefreshRate |
| 253 | + ", maxRefreshRate=" + maxRefreshRate |
| 254 | + ", modeRefreshRate=" + refreshRate); |
| 255 | } |
| 256 | continue; |
| 257 | } |
| 258 | availableModes.add(mode); |
| 259 | } |
| 260 | final int size = availableModes.size(); |
| 261 | int[] availableModeIds = new int[size]; |
| 262 | for (int i = 0; i < size; i++) { |
| 263 | availableModeIds[i] = availableModes.get(i).getModeId(); |
| 264 | } |
| 265 | return availableModeIds; |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Gets the observer responsible for application display mode requests. |
| 270 | */ |
| 271 | @NonNull |
| 272 | public AppRequestObserver getAppRequestObserver() { |
| 273 | // We don't need to lock here because mAppRequestObserver is a final field, which is |
| 274 | // guaranteed to be visible on all threads after construction. |
| 275 | return mAppRequestObserver; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Sets the listener for changes to allowed display modes. |
| 280 | */ |
| 281 | public void setListener(@Nullable Listener listener) { |
| 282 | synchronized (mLock) { |
| 283 | mListener = listener; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Print the object's state and debug information into the given stream. |
| 289 | * |
| 290 | * @param pw The stream to dump information to. |
| 291 | */ |
| 292 | public void dump(PrintWriter pw) { |
| 293 | pw.println("DisplayModeDirector"); |
| 294 | synchronized (mLock) { |
| 295 | pw.println(" mSupportedModesByDisplay:"); |
| 296 | for (int i = 0; i < mSupportedModesByDisplay.size(); i++) { |
| 297 | final int id = mSupportedModesByDisplay.keyAt(i); |
| 298 | final Display.Mode[] modes = mSupportedModesByDisplay.valueAt(i); |
| 299 | pw.println(" " + id + " -> " + Arrays.toString(modes)); |
| 300 | } |
| 301 | pw.println(" mDefaultModeByDisplay:"); |
| 302 | for (int i = 0; i < mDefaultModeByDisplay.size(); i++) { |
| 303 | final int id = mDefaultModeByDisplay.keyAt(i); |
| 304 | final Display.Mode mode = mDefaultModeByDisplay.valueAt(i); |
| 305 | pw.println(" " + id + " -> " + mode); |
| 306 | } |
| 307 | pw.println(" mVotesByDisplay:"); |
| 308 | for (int i = 0; i < mVotesByDisplay.size(); i++) { |
| 309 | pw.println(" " + mVotesByDisplay.keyAt(i) + ":"); |
| 310 | SparseArray<Vote> votes = mVotesByDisplay.valueAt(i); |
| 311 | for (int p = Vote.MAX_PRIORITY; p >= Vote.MIN_PRIORITY; p--) { |
| 312 | Vote vote = votes.get(p); |
| 313 | if (vote == null) { |
| 314 | continue; |
| 315 | } |
| 316 | pw.println(" " + Vote.priorityToString(p) + " -> " + vote); |
| 317 | } |
| 318 | } |
| 319 | mSettingsObserver.dumpLocked(pw); |
| 320 | mAppRequestObserver.dumpLocked(pw); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | private void updateVoteLocked(int priority, Vote vote) { |
| 325 | updateVoteLocked(GLOBAL_ID, priority, vote); |
| 326 | } |
| 327 | |
| 328 | private void updateVoteLocked(int displayId, int priority, Vote vote) { |
| 329 | if (DEBUG) { |
| 330 | Slog.i(TAG, "updateVoteLocked(displayId=" + displayId |
| 331 | + ", priority=" + Vote.priorityToString(priority) |
| 332 | + ", vote=" + vote + ")"); |
| 333 | } |
| 334 | if (priority < Vote.MIN_PRIORITY || priority > Vote.MAX_PRIORITY) { |
| 335 | Slog.w(TAG, "Received a vote with an invalid priority, ignoring:" |
| 336 | + " priority=" + Vote.priorityToString(priority) |
| 337 | + ", vote=" + vote, new Throwable()); |
| 338 | return; |
| 339 | } |
| 340 | final SparseArray<Vote> votes = getOrCreateVotesByDisplay(displayId); |
| 341 | |
| 342 | Vote currentVote = votes.get(priority); |
| 343 | if (vote != null) { |
| 344 | votes.put(priority, vote); |
| 345 | } else { |
| 346 | votes.remove(priority); |
| 347 | } |
| 348 | |
| 349 | if (votes.size() == 0) { |
| 350 | if (DEBUG) { |
| 351 | Slog.i(TAG, "No votes left for display " + displayId + ", removing."); |
| 352 | } |
| 353 | mVotesByDisplay.remove(displayId); |
| 354 | } |
| 355 | |
| 356 | notifyAllowedModesChangedLocked(); |
| 357 | } |
| 358 | |
| 359 | private void notifyAllowedModesChangedLocked() { |
| 360 | if (mListener != null && !mHandler.hasMessages(MSG_ALLOWED_MODES_CHANGED)) { |
| 361 | // We need to post this to a handler to avoid calling out while holding the lock |
| 362 | // since we know there are things that both listen for changes as well as provide |
| 363 | // information. If we did call out while holding the lock, then there's no guaranteed |
| 364 | // lock order and we run the real of risk deadlock. |
| 365 | Message msg = mHandler.obtainMessage(MSG_ALLOWED_MODES_CHANGED, mListener); |
| 366 | msg.sendToTarget(); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | private SparseArray<Vote> getOrCreateVotesByDisplay(int displayId) { |
| 371 | int index = mVotesByDisplay.indexOfKey(displayId); |
| 372 | if (mVotesByDisplay.indexOfKey(displayId) >= 0) { |
| 373 | return mVotesByDisplay.get(displayId); |
| 374 | } else { |
| 375 | SparseArray<Vote> votes = new SparseArray<>(); |
| 376 | mVotesByDisplay.put(displayId, votes); |
| 377 | return votes; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Listens for changes to display mode coordination. |
| 383 | */ |
| 384 | public interface Listener { |
| 385 | /** |
| 386 | * Called when the allowed display modes may have changed. |
| 387 | */ |
| 388 | void onAllowedDisplayModesChanged(); |
| 389 | } |
| 390 | |
| 391 | private static final class DisplayModeDirectorHandler extends Handler { |
| 392 | DisplayModeDirectorHandler(Looper looper) { |
| 393 | super(looper, null, true /*async*/); |
| 394 | } |
| 395 | |
| 396 | @Override |
| 397 | public void handleMessage(Message msg) { |
| 398 | switch (msg.what) { |
| 399 | case MSG_ALLOWED_MODES_CHANGED: |
| 400 | Listener listener = (Listener) msg.obj; |
| 401 | listener.onAllowedDisplayModesChanged(); |
| 402 | break; |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | private static final class Vote { |
| 408 | public static final int PRIORITY_USER_SETTING = 0; |
| 409 | // We split the app request into two priorities in case we can satisfy one desire without |
| 410 | // the other. |
| 411 | public static final int PRIORITY_APP_REQUEST_REFRESH_RATE = 1; |
| 412 | public static final int PRIORITY_APP_REQUEST_SIZE = 2; |
| 413 | public static final int PRIORITY_LOW_POWER_MODE = 3; |
| 414 | |
| 415 | // Whenever a new priority is added, remember to update MIN_PRIORITY and/or MAX_PRIORITY as |
| 416 | // appropriate, as well as priorityToString. |
| 417 | |
| 418 | public static final int MIN_PRIORITY = PRIORITY_USER_SETTING; |
| 419 | public static final int MAX_PRIORITY = PRIORITY_LOW_POWER_MODE; |
| 420 | |
| 421 | /** |
| 422 | * A value signifying an invalid width or height in a vote. |
| 423 | */ |
| 424 | public static final int INVALID_SIZE = -1; |
| 425 | |
| 426 | /** |
| 427 | * The requested width of the display in pixels, or INVALID_SIZE; |
| 428 | */ |
| 429 | public final int width; |
| 430 | /** |
| 431 | * The requested height of the display in pixels, or INVALID_SIZE; |
| 432 | */ |
| 433 | public final int height; |
| 434 | |
| 435 | /** |
| 436 | * The lowest desired refresh rate. |
| 437 | */ |
| 438 | public final float minRefreshRate; |
| 439 | /** |
| 440 | * The highest desired refresh rate. |
| 441 | */ |
| 442 | public final float maxRefreshRate; |
| 443 | |
| 444 | public static Vote forRefreshRates(float minRefreshRate, float maxRefreshRate) { |
| 445 | return new Vote(INVALID_SIZE, INVALID_SIZE, minRefreshRate, maxRefreshRate); |
| 446 | } |
| 447 | |
| 448 | public static Vote forSize(int width, int height) { |
| 449 | return new Vote(width, height, 0f, Float.POSITIVE_INFINITY); |
| 450 | } |
| 451 | |
| 452 | private Vote(int width, int height, |
| 453 | float minRefreshRate, float maxRefreshRate) { |
| 454 | this.width = width; |
| 455 | this.height = height; |
| 456 | this.minRefreshRate = minRefreshRate; |
| 457 | this.maxRefreshRate = maxRefreshRate; |
| 458 | } |
| 459 | |
| 460 | public static String priorityToString(int priority) { |
| 461 | switch (priority) { |
| 462 | case PRIORITY_USER_SETTING: |
| 463 | return "PRIORITY_USER_SETTING"; |
| 464 | case PRIORITY_APP_REQUEST_REFRESH_RATE: |
| 465 | return "PRIORITY_APP_REQUEST_REFRESH_RATE"; |
| 466 | case PRIORITY_APP_REQUEST_SIZE: |
| 467 | return "PRIORITY_APP_REQUEST_SIZE"; |
| 468 | case PRIORITY_LOW_POWER_MODE: |
| 469 | return "PRIORITY_LOW_POWER_MODE"; |
| 470 | default: |
| 471 | return Integer.toString(priority); |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | @Override |
| 476 | public String toString() { |
| 477 | return "Vote{" |
| 478 | + "width=" + width |
| 479 | + ", height=" + height |
| 480 | + ", minRefreshRate=" + minRefreshRate |
| 481 | + ", maxRefreshRate=" + maxRefreshRate |
| 482 | + "}"; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | private final class SettingsObserver extends ContentObserver { |
| 487 | private final Uri mRefreshRateSetting = |
| 488 | Settings.System.getUriFor(Settings.System.PEAK_REFRESH_RATE); |
| 489 | private final Uri mLowPowerModeSetting = |
| 490 | Settings.Global.getUriFor(Settings.Global.LOW_POWER_MODE); |
| 491 | |
| 492 | private final Context mContext; |
| 493 | private final float mDefaultPeakRefreshRate; |
| 494 | |
| 495 | SettingsObserver(@NonNull Context context, @NonNull Handler handler) { |
| 496 | super(handler); |
| 497 | mContext = context; |
| 498 | mDefaultPeakRefreshRate = (float) context.getResources().getInteger( |
| 499 | R.integer.config_defaultPeakRefreshRate); |
| 500 | } |
| 501 | |
| 502 | public void observe() { |
| 503 | final ContentResolver cr = mContext.getContentResolver(); |
| 504 | cr.registerContentObserver(mRefreshRateSetting, false /*notifyDescendants*/, this, |
| 505 | UserHandle.USER_SYSTEM); |
| 506 | cr.registerContentObserver(mLowPowerModeSetting, false /*notifyDescendants*/, this, |
| 507 | UserHandle.USER_SYSTEM); |
| 508 | synchronized (mLock) { |
| 509 | updateRefreshRateSettingLocked(); |
| 510 | updateLowPowerModeSettingLocked(); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | @Override |
| 515 | public void onChange(boolean selfChange, Uri uri, int userId) { |
| 516 | synchronized (mLock) { |
| 517 | if (mRefreshRateSetting.equals(uri)) { |
| 518 | updateRefreshRateSettingLocked(); |
| 519 | } else if (mLowPowerModeSetting.equals(uri)) { |
| 520 | updateLowPowerModeSettingLocked(); |
| 521 | } |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | private void updateLowPowerModeSettingLocked() { |
| 526 | boolean inLowPowerMode = Settings.Global.getInt(mContext.getContentResolver(), |
| 527 | Settings.Global.LOW_POWER_MODE, 0 /*default*/) != 0; |
| 528 | final Vote vote; |
| 529 | if (inLowPowerMode) { |
| 530 | vote = Vote.forRefreshRates(0f, 60f); |
| 531 | } else { |
| 532 | vote = null; |
| 533 | } |
| 534 | updateVoteLocked(Vote.PRIORITY_LOW_POWER_MODE, vote); |
| 535 | } |
| 536 | |
| 537 | private void updateRefreshRateSettingLocked() { |
| 538 | float peakRefreshRate = Settings.System.getFloat(mContext.getContentResolver(), |
| 539 | Settings.System.PEAK_REFRESH_RATE, DEFAULT_REFRESH_RATE); |
| 540 | Vote vote = Vote.forRefreshRates(0f, peakRefreshRate); |
| 541 | updateVoteLocked(Vote.PRIORITY_USER_SETTING, vote); |
| 542 | } |
| 543 | |
| 544 | public void dumpLocked(PrintWriter pw) { |
| 545 | pw.println(" SettingsObserver"); |
| 546 | pw.println(" mDefaultPeakRefreshRate: " + mDefaultPeakRefreshRate); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | final class AppRequestObserver { |
| 551 | private SparseArray<Display.Mode> mAppRequestedModeByDisplay; |
| 552 | |
| 553 | AppRequestObserver() { |
| 554 | mAppRequestedModeByDisplay = new SparseArray<>(); |
| 555 | } |
| 556 | |
| 557 | public void setAppRequestedMode(int displayId, int modeId) { |
| 558 | synchronized (mLock) { |
| 559 | setAppRequestedModeLocked(displayId, modeId); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | private void setAppRequestedModeLocked(int displayId, int modeId) { |
| 564 | final Display.Mode requestedMode = findModeByIdLocked(displayId, modeId); |
| 565 | if (Objects.equals(requestedMode, mAppRequestedModeByDisplay.get(displayId))) { |
| 566 | return; |
| 567 | } |
| 568 | |
| 569 | final Vote refreshRateVote; |
| 570 | final Vote sizeVote; |
| 571 | if (requestedMode != null) { |
| 572 | mAppRequestedModeByDisplay.put(displayId, requestedMode); |
| 573 | float refreshRate = requestedMode.getRefreshRate(); |
| 574 | refreshRateVote = Vote.forRefreshRates(refreshRate, refreshRate); |
| 575 | sizeVote = Vote.forSize(requestedMode.getPhysicalWidth(), |
| 576 | requestedMode.getPhysicalHeight()); |
| 577 | } else { |
| 578 | mAppRequestedModeByDisplay.remove(displayId); |
| 579 | refreshRateVote = null; |
| 580 | sizeVote = null; |
| 581 | } |
| 582 | updateVoteLocked(displayId, Vote.PRIORITY_APP_REQUEST_REFRESH_RATE, refreshRateVote); |
| 583 | updateVoteLocked(displayId, Vote.PRIORITY_APP_REQUEST_SIZE, sizeVote); |
| 584 | return; |
| 585 | } |
| 586 | |
| 587 | private Display.Mode findModeByIdLocked(int displayId, int modeId) { |
| 588 | Display.Mode[] modes = mSupportedModesByDisplay.get(displayId); |
| 589 | if (modes == null) { |
| 590 | return null; |
| 591 | } |
| 592 | for (Display.Mode mode : modes) { |
| 593 | if (mode.getModeId() == modeId) { |
| 594 | return mode; |
| 595 | } |
| 596 | } |
| 597 | return null; |
| 598 | } |
| 599 | |
| 600 | public void dumpLocked(PrintWriter pw) { |
| 601 | pw.println(" AppRequestObserver"); |
| 602 | pw.println(" mAppRequestedModeByDisplay:"); |
| 603 | for (int i = 0; i < mAppRequestedModeByDisplay.size(); i++) { |
| 604 | final int id = mAppRequestedModeByDisplay.keyAt(i); |
| 605 | final Display.Mode mode = mAppRequestedModeByDisplay.valueAt(i); |
| 606 | pw.println(" " + id + " -> " + mode); |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | private final class DisplayObserver implements DisplayManager.DisplayListener { |
| 612 | // Note that we can never call into DisplayManager or any of the non-POD classes it |
| 613 | // returns, while holding mLock since it may call into DMS, which might be simultaneously |
| 614 | // calling into us already holding its own lock. |
| 615 | private final Context mContext; |
| 616 | private final Handler mHandler; |
| 617 | |
| 618 | DisplayObserver(Context context, Handler handler) { |
| 619 | mContext = context; |
| 620 | mHandler = handler; |
| 621 | } |
| 622 | |
| 623 | public void observe() { |
| 624 | DisplayManager dm = mContext.getSystemService(DisplayManager.class); |
| 625 | dm.registerDisplayListener(this, mHandler); |
| 626 | |
| 627 | // Populate existing displays |
| 628 | SparseArray<Display.Mode[]> modes = new SparseArray<>(); |
| 629 | SparseArray<Display.Mode> defaultModes = new SparseArray<>(); |
| 630 | DisplayInfo info = new DisplayInfo(); |
| 631 | Display[] displays = dm.getDisplays(); |
| 632 | for (Display d : displays) { |
| 633 | final int displayId = d.getDisplayId(); |
| 634 | d.getDisplayInfo(info); |
| 635 | modes.put(displayId, info.supportedModes); |
| 636 | defaultModes.put(displayId, info.getDefaultMode()); |
| 637 | } |
| 638 | synchronized (mLock) { |
| 639 | final int size = modes.size(); |
| 640 | for (int i = 0; i < size; i++) { |
| 641 | mSupportedModesByDisplay.put(modes.keyAt(i), modes.valueAt(i)); |
| 642 | mDefaultModeByDisplay.put(defaultModes.keyAt(i), defaultModes.valueAt(i)); |
| 643 | } |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | @Override |
| 648 | public void onDisplayAdded(int displayId) { |
| 649 | updateDisplayModes(displayId); |
| 650 | } |
| 651 | |
| 652 | @Override |
| 653 | public void onDisplayRemoved(int displayId) { |
| 654 | synchronized (mLock) { |
| 655 | mSupportedModesByDisplay.remove(displayId); |
| 656 | mDefaultModeByDisplay.remove(displayId); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | @Override |
| 661 | public void onDisplayChanged(int displayId) { |
| 662 | updateDisplayModes(displayId); |
| 663 | } |
| 664 | |
| 665 | private void updateDisplayModes(int displayId) { |
| 666 | Display d = mContext.getSystemService(DisplayManager.class).getDisplay(displayId); |
| 667 | DisplayInfo info = new DisplayInfo(); |
| 668 | d.getDisplayInfo(info); |
| 669 | boolean changed = false; |
| 670 | synchronized (mLock) { |
| 671 | if (!Arrays.equals(mSupportedModesByDisplay.get(displayId), info.supportedModes)) { |
| 672 | mSupportedModesByDisplay.put(displayId, info.supportedModes); |
| 673 | changed = true; |
| 674 | } |
| 675 | if (!Objects.equals(mDefaultModeByDisplay.get(displayId), info.getDefaultMode())) { |
| 676 | changed = true; |
| 677 | mDefaultModeByDisplay.put(displayId, info.getDefaultMode()); |
| 678 | } |
| 679 | if (changed) { |
| 680 | notifyAllowedModesChangedLocked(); |
| 681 | } |
| 682 | } |
| 683 | } |
| 684 | } |
| 685 | } |