| /* |
| * Copyright (C) 2013 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.content.Context; |
| import android.hardware.display.DisplayManager; |
| import android.hardware.display.IVirtualDisplayCallback; |
| import android.media.projection.IMediaProjection; |
| import android.media.projection.IMediaProjectionCallback; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.SystemProperties; |
| import android.os.IBinder.DeathRecipient; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.util.ArrayMap; |
| import android.util.Slog; |
| import android.view.Display; |
| import android.view.Surface; |
| import android.view.SurfaceControl; |
| |
| import java.io.PrintWriter; |
| import java.util.Iterator; |
| |
| /** |
| * A display adapter that provides virtual displays on behalf of applications. |
| * <p> |
| * Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock. |
| * </p> |
| */ |
| final class VirtualDisplayAdapter extends DisplayAdapter { |
| static final String TAG = "VirtualDisplayAdapter"; |
| static final boolean DEBUG = false; |
| |
| // Unique id prefix for virtual displays |
| private static final String UNIQUE_ID_PREFIX = "virtual:"; |
| |
| private final ArrayMap<IBinder, VirtualDisplayDevice> mVirtualDisplayDevices = |
| new ArrayMap<IBinder, VirtualDisplayDevice>(); |
| private Handler mHandler; |
| |
| // Called with SyncRoot lock held. |
| public VirtualDisplayAdapter(DisplayManagerService.SyncRoot syncRoot, |
| Context context, Handler handler, Listener listener) { |
| super(syncRoot, context, handler, listener, TAG); |
| mHandler = handler; |
| } |
| |
| public DisplayDevice createVirtualDisplayLocked(IVirtualDisplayCallback callback, |
| IMediaProjection projection, int ownerUid, String ownerPackageName, |
| String name, int width, int height, int densityDpi, Surface surface, int flags) { |
| boolean secure = (flags & DisplayManager.VIRTUAL_DISPLAY_FLAG_SECURE) != 0; |
| IBinder appToken = callback.asBinder(); |
| IBinder displayToken = SurfaceControl.createDisplay(name, secure); |
| final String baseUniqueId = |
| UNIQUE_ID_PREFIX + ownerPackageName + "," + ownerUid + "," + name + ","; |
| final int uniqueIndex = getNextUniqueIndex(baseUniqueId); |
| VirtualDisplayDevice device = new VirtualDisplayDevice(displayToken, appToken, |
| ownerUid, ownerPackageName, name, width, height, densityDpi, surface, flags, |
| new Callback(callback, mHandler), baseUniqueId + uniqueIndex, uniqueIndex); |
| |
| mVirtualDisplayDevices.put(appToken, device); |
| |
| try { |
| if (projection != null) { |
| projection.registerCallback(new MediaProjectionCallback(appToken)); |
| } |
| appToken.linkToDeath(device, 0); |
| } catch (RemoteException ex) { |
| mVirtualDisplayDevices.remove(appToken); |
| device.destroyLocked(false); |
| return null; |
| } |
| |
| // Return the display device without actually sending the event indicating |
| // that it was added. The caller will handle it. |
| return device; |
| } |
| |
| public void resizeVirtualDisplayLocked(IBinder appToken, |
| int width, int height, int densityDpi) { |
| VirtualDisplayDevice device = mVirtualDisplayDevices.get(appToken); |
| if (device != null) { |
| device.resizeLocked(width, height, densityDpi); |
| } |
| } |
| |
| |
| public void setVirtualDisplaySurfaceLocked(IBinder appToken, Surface surface) { |
| VirtualDisplayDevice device = mVirtualDisplayDevices.get(appToken); |
| if (device != null) { |
| device.setSurfaceLocked(surface); |
| } |
| } |
| |
| public DisplayDevice releaseVirtualDisplayLocked(IBinder appToken) { |
| VirtualDisplayDevice device = mVirtualDisplayDevices.remove(appToken); |
| if (device != null) { |
| device.destroyLocked(true); |
| appToken.unlinkToDeath(device, 0); |
| } |
| |
| // Return the display device that was removed without actually sending the |
| // event indicating that it was removed. The caller will handle it. |
| return device; |
| } |
| |
| /** |
| * Returns the next unique index for the uniqueIdPrefix |
| */ |
| private int getNextUniqueIndex(String uniqueIdPrefix) { |
| if (mVirtualDisplayDevices.isEmpty()) { |
| return 0; |
| } |
| |
| int nextUniqueIndex = 0; |
| Iterator<VirtualDisplayDevice> it = mVirtualDisplayDevices.values().iterator(); |
| while (it.hasNext()) { |
| VirtualDisplayDevice device = it.next(); |
| if (device.getUniqueId().startsWith(uniqueIdPrefix) |
| && device.mUniqueIndex >= nextUniqueIndex) { |
| // Increment the next unique index to be greater than ones we have already ran |
| // across for displays that have the same unique Id prefix. |
| nextUniqueIndex = device.mUniqueIndex + 1; |
| } |
| } |
| |
| return nextUniqueIndex; |
| } |
| |
| private void handleBinderDiedLocked(IBinder appToken) { |
| VirtualDisplayDevice device = mVirtualDisplayDevices.remove(appToken); |
| if (device != null) { |
| Slog.i(TAG, "Virtual display device released because application token died: " |
| + device.mOwnerPackageName); |
| device.destroyLocked(false); |
| sendDisplayDeviceEventLocked(device, DISPLAY_DEVICE_EVENT_REMOVED); |
| } |
| } |
| |
| private void handleMediaProjectionStoppedLocked(IBinder appToken) { |
| VirtualDisplayDevice device = mVirtualDisplayDevices.remove(appToken); |
| if (device != null) { |
| Slog.i(TAG, "Virtual display device released because media projection stopped: " |
| + device.mName); |
| device.stopLocked(); |
| } |
| } |
| |
| private final class VirtualDisplayDevice extends DisplayDevice implements DeathRecipient { |
| private static final int PENDING_SURFACE_CHANGE = 0x01; |
| private static final int PENDING_RESIZE = 0x02; |
| |
| private static final float REFRESH_RATE = 60.0f; |
| |
| private final IBinder mAppToken; |
| private final int mOwnerUid; |
| final String mOwnerPackageName; |
| final String mName; |
| private final int mFlags; |
| private final Callback mCallback; |
| |
| private int mWidth; |
| private int mHeight; |
| private int mDensityDpi; |
| private Surface mSurface; |
| private DisplayDeviceInfo mInfo; |
| private int mDisplayState; |
| private boolean mStopped; |
| private int mPendingChanges; |
| private int mUniqueIndex; |
| private Display.Mode mMode; |
| |
| public VirtualDisplayDevice(IBinder displayToken, IBinder appToken, |
| int ownerUid, String ownerPackageName, |
| String name, int width, int height, int densityDpi, Surface surface, int flags, |
| Callback callback, String uniqueId, int uniqueIndex) { |
| super(VirtualDisplayAdapter.this, displayToken, uniqueId); |
| mAppToken = appToken; |
| mOwnerUid = ownerUid; |
| mOwnerPackageName = ownerPackageName; |
| mName = name; |
| mWidth = width; |
| mHeight = height; |
| mMode = createMode(width, height, REFRESH_RATE); |
| mDensityDpi = densityDpi; |
| mSurface = surface; |
| mFlags = flags; |
| mCallback = callback; |
| mDisplayState = Display.STATE_UNKNOWN; |
| mPendingChanges |= PENDING_SURFACE_CHANGE; |
| mUniqueIndex = uniqueIndex; |
| } |
| |
| @Override |
| public void binderDied() { |
| synchronized (getSyncRoot()) { |
| handleBinderDiedLocked(mAppToken); |
| } |
| } |
| |
| public void destroyLocked(boolean binderAlive) { |
| if (mSurface != null) { |
| mSurface.release(); |
| mSurface = null; |
| } |
| SurfaceControl.destroyDisplay(getDisplayTokenLocked()); |
| if (binderAlive) { |
| mCallback.dispatchDisplayStopped(); |
| } |
| } |
| |
| @Override |
| public Runnable requestDisplayStateLocked(int state, int brightness) { |
| if (state != mDisplayState) { |
| mDisplayState = state; |
| if (state == Display.STATE_OFF) { |
| mCallback.dispatchDisplayPaused(); |
| } else { |
| mCallback.dispatchDisplayResumed(); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void performTraversalInTransactionLocked() { |
| if ((mPendingChanges & PENDING_RESIZE) != 0) { |
| SurfaceControl.setDisplaySize(getDisplayTokenLocked(), mWidth, mHeight); |
| } |
| if ((mPendingChanges & PENDING_SURFACE_CHANGE) != 0) { |
| setSurfaceInTransactionLocked(mSurface); |
| } |
| mPendingChanges = 0; |
| } |
| |
| public void setSurfaceLocked(Surface surface) { |
| if (!mStopped && mSurface != surface) { |
| if ((mSurface != null) != (surface != null)) { |
| sendDisplayDeviceEventLocked(this, DISPLAY_DEVICE_EVENT_CHANGED); |
| } |
| sendTraversalRequestLocked(); |
| mSurface = surface; |
| mInfo = null; |
| mPendingChanges |= PENDING_SURFACE_CHANGE; |
| } |
| } |
| |
| public void resizeLocked(int width, int height, int densityDpi) { |
| if (mWidth != width || mHeight != height || mDensityDpi != densityDpi) { |
| sendDisplayDeviceEventLocked(this, DISPLAY_DEVICE_EVENT_CHANGED); |
| sendTraversalRequestLocked(); |
| mWidth = width; |
| mHeight = height; |
| mMode = createMode(width, height, REFRESH_RATE); |
| mDensityDpi = densityDpi; |
| mInfo = null; |
| mPendingChanges |= PENDING_RESIZE; |
| } |
| } |
| |
| public void stopLocked() { |
| setSurfaceLocked(null); |
| mStopped = true; |
| } |
| |
| @Override |
| public void dumpLocked(PrintWriter pw) { |
| super.dumpLocked(pw); |
| pw.println("mFlags=" + mFlags); |
| pw.println("mDisplayState=" + Display.stateToString(mDisplayState)); |
| pw.println("mStopped=" + mStopped); |
| } |
| |
| |
| @Override |
| public DisplayDeviceInfo getDisplayDeviceInfoLocked() { |
| if (mInfo == null) { |
| mInfo = new DisplayDeviceInfo(); |
| mInfo.name = mName; |
| mInfo.uniqueId = getUniqueId(); |
| mInfo.width = mWidth; |
| mInfo.height = mHeight; |
| mInfo.modeId = mMode.getModeId(); |
| mInfo.defaultModeId = mMode.getModeId(); |
| mInfo.supportedModes = new Display.Mode[] { mMode }; |
| mInfo.densityDpi = mDensityDpi; |
| mInfo.xDpi = mDensityDpi; |
| mInfo.yDpi = mDensityDpi; |
| mInfo.presentationDeadlineNanos = 1000000000L / (int) REFRESH_RATE; // 1 frame |
| mInfo.flags = 0; |
| if ((mFlags & DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC) == 0) { |
| mInfo.flags |= DisplayDeviceInfo.FLAG_PRIVATE |
| | DisplayDeviceInfo.FLAG_NEVER_BLANK; |
| } |
| if ((mFlags & DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR) != 0) { |
| mInfo.flags &= ~DisplayDeviceInfo.FLAG_NEVER_BLANK; |
| } else { |
| mInfo.flags |= DisplayDeviceInfo.FLAG_OWN_CONTENT_ONLY; |
| } |
| |
| if ((mFlags & DisplayManager.VIRTUAL_DISPLAY_FLAG_SECURE) != 0) { |
| mInfo.flags |= DisplayDeviceInfo.FLAG_SECURE; |
| } |
| if ((mFlags & DisplayManager.VIRTUAL_DISPLAY_FLAG_PRESENTATION) != 0) { |
| mInfo.flags |= DisplayDeviceInfo.FLAG_PRESENTATION; |
| |
| if ((mFlags & DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC) != 0) { |
| // For demonstration purposes, allow rotation of the external display. |
| // In the future we might allow the user to configure this directly. |
| if ("portrait".equals(SystemProperties.get( |
| "persist.demo.remoterotation"))) { |
| mInfo.rotation = Surface.ROTATION_270; |
| } |
| } |
| } |
| mInfo.type = Display.TYPE_VIRTUAL; |
| mInfo.touch = DisplayDeviceInfo.TOUCH_NONE; |
| mInfo.state = mSurface != null ? Display.STATE_ON : Display.STATE_OFF; |
| mInfo.ownerUid = mOwnerUid; |
| mInfo.ownerPackageName = mOwnerPackageName; |
| } |
| return mInfo; |
| } |
| } |
| |
| private static class Callback extends Handler { |
| private static final int MSG_ON_DISPLAY_PAUSED = 0; |
| private static final int MSG_ON_DISPLAY_RESUMED = 1; |
| private static final int MSG_ON_DISPLAY_STOPPED = 2; |
| |
| private final IVirtualDisplayCallback mCallback; |
| |
| public Callback(IVirtualDisplayCallback callback, Handler handler) { |
| super(handler.getLooper()); |
| mCallback = callback; |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| try { |
| switch (msg.what) { |
| case MSG_ON_DISPLAY_PAUSED: |
| mCallback.onPaused(); |
| break; |
| case MSG_ON_DISPLAY_RESUMED: |
| mCallback.onResumed(); |
| break; |
| case MSG_ON_DISPLAY_STOPPED: |
| mCallback.onStopped(); |
| break; |
| } |
| } catch (RemoteException e) { |
| Slog.w(TAG, "Failed to notify listener of virtual display event.", e); |
| } |
| } |
| |
| public void dispatchDisplayPaused() { |
| sendEmptyMessage(MSG_ON_DISPLAY_PAUSED); |
| } |
| |
| public void dispatchDisplayResumed() { |
| sendEmptyMessage(MSG_ON_DISPLAY_RESUMED); |
| } |
| |
| public void dispatchDisplayStopped() { |
| sendEmptyMessage(MSG_ON_DISPLAY_STOPPED); |
| } |
| } |
| |
| private final class MediaProjectionCallback extends IMediaProjectionCallback.Stub { |
| private IBinder mAppToken; |
| public MediaProjectionCallback(IBinder appToken) { |
| mAppToken = appToken; |
| } |
| |
| @Override |
| public void onStop() { |
| synchronized (getSyncRoot()) { |
| handleMediaProjectionStoppedLocked(mAppToken); |
| } |
| } |
| } |
| } |