Merge "Use MediaPlayer in a background thread." into tm-dev am: a7358c9d83

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18723155

Change-Id: Idc5126896fb308bb8ad8bd2e8ca92780069cda39
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotController.java

@@ -83,6 +83,8 @@ import android.view.accessibility.AccessibilityManager;
 import android.widget.Toast;
 import android.window.WindowContext;
 
+import androidx.concurrent.futures.CallbackToFutureAdapter;
+
 import com.android.internal.app.ChooserActivity;
 import com.android.internal.logging.UiEventLogger;
 import com.android.internal.policy.PhoneWindow;
@@ -254,7 +256,7 @@ public class ScreenshotController {
     private final WindowManager mWindowManager;
     private final WindowManager.LayoutParams mWindowLayoutParams;
     private final AccessibilityManager mAccessibilityManager;
-    private final MediaPlayer mCameraSound;
+    private final ListenableFuture<MediaPlayer> mCameraSound;
     private final ScrollCaptureClient mScrollCaptureClient;
     private final PhoneWindow mWindow;
     private final DisplayManager mDisplayManager;
@@ -338,13 +340,7 @@ public class ScreenshotController {
         reloadAssets();
 
         // Setup the Camera shutter sound
-        mCameraSound = MediaPlayer.create(mContext,
-                Uri.fromFile(new File(mContext.getResources().getString(
-                        com.android.internal.R.string.config_cameraShutterSound))), null,
-                new AudioAttributes.Builder()
-                        .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
-                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
-                        .build(), AudioSystem.newAudioSessionId());
+        mCameraSound = loadCameraSound();
 
         mCopyBroadcastReceiver = new BroadcastReceiver() {
             @Override
@@ -442,16 +438,32 @@ public class ScreenshotController {
         return mScreenshotView.isPendingSharedTransition();
     }
 
+    // Any cleanup needed when the service is being destroyed.
+    void onDestroy() {
+        removeWindow();
+        releaseMediaPlayer();
+        releaseContext();
+        mBgExecutor.shutdownNow();
+    }
+
     /**
      * Release the constructed window context.
      */
-    void releaseContext() {
+    private void releaseContext() {
         mContext.unregisterReceiver(mCopyBroadcastReceiver);
         mContext.release();
-        if (mCameraSound != null) {
-            mCameraSound.release();
+    }
+
+    private void releaseMediaPlayer() {
+        // Note that this may block if the sound is still being loaded (very unlikely) but we can't
+        // reliably release in the background because the service is being destroyed.
+        try {
+            MediaPlayer player = mCameraSound.get();
+            if (player != null) {
+                player.release();
+            }
+        } catch (InterruptedException | ExecutionException e) {
         }
-        mBgExecutor.shutdownNow();
     }
 
     /**
@@ -822,15 +834,42 @@ public class ScreenshotController {
         }
     }
 
+    private ListenableFuture<MediaPlayer> loadCameraSound() {
+        // The media player creation is slow and needs on the background thread.
+        return CallbackToFutureAdapter.getFuture((completer) -> {
+            mBgExecutor.execute(() -> {
+                MediaPlayer player = MediaPlayer.create(mContext,
+                        Uri.fromFile(new File(mContext.getResources().getString(
+                                com.android.internal.R.string.config_cameraShutterSound))), null,
+                        new AudioAttributes.Builder()
+                                .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
+                                .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
+                                .build(), AudioSystem.newAudioSessionId());
+                completer.set(player);
+            });
+            return "ScreenshotController#loadCameraSound";
+        });
+    }
+
+    private void playCameraSound() {
+        mCameraSound.addListener(() -> {
+            try {
+                MediaPlayer player = mCameraSound.get();
+                if (player != null) {
+                    player.start();
+                }
+            } catch (InterruptedException | ExecutionException e) {
+            }
+        }, mBgExecutor);
+    }
+
     /**
      * Save the bitmap but don't show the normal screenshot UI.. just a toast (or notification on
      * failure).
      */
     private void saveScreenshotAndToast(Consumer<Uri> finisher) {
         // Play the shutter sound to notify that we've taken a screenshot
-        if (mCameraSound != null) {
-            mCameraSound.start();
-        }
+        playCameraSound();
 
         saveScreenshotInWorkerThread(
                 /* onComplete */ finisher,
@@ -864,9 +903,7 @@ public class ScreenshotController {
                 mScreenshotView.createScreenshotDropInAnimation(screenRect, showFlash);
 
         // Play the shutter sound to notify that we've taken a screenshot
-        if (mCameraSound != null) {
-            mCameraSound.start();
-        }
+        playCameraSound();
 
         if (DEBUG_ANIM) {
             Log.d(TAG, "starting post-screenshot animation");

packages/SystemUI/src/com/android/systemui/screenshot/TakeScreenshotService.java

@@ -153,8 +153,7 @@ public class TakeScreenshotService extends Service {
     public void onDestroy() {
         super.onDestroy();
         if (mScreenshot != null) {
-            mScreenshot.removeWindow();
-            mScreenshot.releaseContext();
+            mScreenshot.onDestroy();
             mScreenshot = null;
         }
         if (DEBUG_SERVICE) {