Merge "Fix frame rate idleness and TextureView video play logic" into main
diff --git a/core/java/android/view/TextureView.java b/core/java/android/view/TextureView.java
index 896b3f4..124aece 100644
--- a/core/java/android/view/TextureView.java
+++ b/core/java/android/view/TextureView.java
@@ -16,6 +16,8 @@
 
 package android.view;
 
+import static android.view.Surface.FRAME_RATE_CATEGORY_NORMAL;
+
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.compat.annotation.UnsupportedAppUsage;
@@ -883,6 +885,17 @@
         mListener = listener;
     }
 
+    /**
+     * @hide
+     */
+    @Override
+    protected int calculateFrameRateCategory(float sizePercentage) {
+        if (mMinusTwoFrameIntervalMillis > 15 && mMinusOneFrameIntervalMillis > 15) {
+            return FRAME_RATE_CATEGORY_NORMAL;
+        }
+        return super.calculateFrameRateCategory(sizePercentage);
+    }
+
     @UnsupportedAppUsage
     private final SurfaceTexture.OnFrameAvailableListener mUpdateListener =
             surfaceTexture -> {
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 4df95bf..22d34e6 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -5649,9 +5649,15 @@
 
     private int mInfrequentUpdateCount = 0;
     private long mLastUpdateTimeMillis = 0;
-    private long mMinusOneFrameIntervalMillis = 0;
-    private long mMinusTwoFrameIntervalMillis = 0;
-    private int mLastFrameRateCategory = FRAME_RATE_CATEGORY_HIGH;
+    /**
+     * @hide
+     */
+    protected long mMinusOneFrameIntervalMillis = 0;
+    /**
+     * @hide
+     */
+    protected long mMinusTwoFrameIntervalMillis = 0;
+    private int mLastFrameRateCategory = FRAME_RATE_CATEGORY_NO_PREFERENCE;
 
     @FlaggedApi(FLAG_TOOLKIT_SET_FRAME_RATE_READ_ONLY)
     public static final float REQUESTED_FRAME_RATE_CATEGORY_DEFAULT = Float.NaN;
@@ -33612,7 +33618,12 @@
         return (float) viewSize / screenSize;
     }
 
-    private int calculateFrameRateCategory(float sizePercentage) {
+    /**
+     * Used to calculate the frame rate category of a View.
+     *
+     * @hide
+     */
+    protected int calculateFrameRateCategory(float sizePercentage) {
         if (mMinusTwoFrameIntervalMillis + mMinusOneFrameIntervalMillis
                 < INFREQUENT_UPDATE_INTERVAL_MILLIS) {
             if (sizePercentage <= FRAME_RATE_SIZE_PERCENTAGE_THRESHOLD) {
@@ -33746,7 +33757,10 @@
         mMinusTwoFrameIntervalMillis = mMinusOneFrameIntervalMillis;
         mMinusOneFrameIntervalMillis = timeIntervalMillis;
 
-        mLastUpdateTimeMillis = currentTimeMillis;
+        if (mMinusOneFrameIntervalMillis - mMinusTwoFrameIntervalMillis >= 30
+                && timeIntervalMillis < 2) {
+            return;
+        }
         if (timeIntervalMillis >= INFREQUENT_UPDATE_INTERVAL_MILLIS) {
             mInfrequentUpdateCount = mInfrequentUpdateCount == INFREQUENT_UPDATE_COUNTS
                         ? mInfrequentUpdateCount : mInfrequentUpdateCount + 1;
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index 3c7c82f..b5f3b9a 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -1043,7 +1043,7 @@
     // time for checking idle status periodically.
     private static final int FRAME_RATE_IDLENESS_CHECK_TIME_MILLIS = 500;
     // time for revaluating the idle status before lowering the frame rate.
-    private static final int FRAME_RATE_IDLENESS_REEVALUATE_TIME = 500;
+    private static final int FRAME_RATE_IDLENESS_REEVALUATE_TIME = 1000;
     // time for evaluating the interval between current time and
     // the time when frame rate was set previously.
     private static final int FRAME_RATE_SETTING_REEVALUATE_TIME = 100;
@@ -6540,6 +6540,7 @@
                         mHasInvalidation = false;
                         mHandler.sendEmptyMessageDelayed(MSG_CHECK_INVALIDATION_IDLE,
                                 FRAME_RATE_IDLENESS_REEVALUATE_TIME);
+                        mHasIdledMessage = true;
                     }
                     break;
                 case MSG_REFRESH_POINTER_ICON:
@@ -12368,14 +12369,6 @@
         } finally {
             Trace.traceEnd(Trace.TRACE_TAG_VIEW);
         }
-
-        if (mPreferredFrameRateCategory != FRAME_RATE_CATEGORY_NO_PREFERENCE && !mHasIdledMessage) {
-            // Check where the display is idled periodically.
-            // If so, set the frame rate category to NO_PREFERENCE
-            mHandler.sendEmptyMessageDelayed(MSG_CHECK_INVALIDATION_IDLE,
-                    FRAME_RATE_IDLENESS_CHECK_TIME_MILLIS);
-            mHasIdledMessage = true;
-        }
     }
 
     private void setPreferredFrameRate(float preferredFrameRate) {
@@ -12389,7 +12382,8 @@
                 if (Trace.isTagEnabled(Trace.TRACE_TAG_VIEW)) {
                     Trace.traceBegin(
                             Trace.TRACE_TAG_VIEW, "ViewRootImpl#setFrameRate "
-                                + preferredFrameRate);
+                                + preferredFrameRate + " compatibility "
+                                + mFrameRateCompatibility);
                 }
                 mFrameRateTransaction.setFrameRate(mSurfaceControl, preferredFrameRate,
                     mFrameRateCompatibility).applyAsyncUnsafe();
@@ -12415,7 +12409,7 @@
 
     private boolean shouldSetFrameRate() {
         // use toolkitSetFrameRate flag to gate the change
-        return mSurface.isValid() && mPreferredFrameRate > 0
+        return mSurface.isValid() && mPreferredFrameRate >= 0
                 && shouldEnableDvrr() && !mIsFrameRateConflicted;
     }
 
@@ -12456,6 +12450,7 @@
             mPreferredFrameRateCategory = FRAME_RATE_CATEGORY_LOW;
         }
         mHasInvalidation = true;
+        checkIdleness();
     }
 
     /**
@@ -12498,6 +12493,7 @@
             mHandler.sendEmptyMessageDelayed(MSG_FRAME_RATE_SETTING,
                     FRAME_RATE_SETTING_REEVALUATE_TIME);
         }
+        checkIdleness();
     }
 
     /**
@@ -12603,4 +12599,14 @@
     private boolean shouldEnableDvrr() {
         return sToolkitSetFrameRateReadOnlyFlagValue && mIsFrameRatePowerSavingsBalanced;
     }
+
+    private void checkIdleness() {
+        if (!mHasIdledMessage) {
+            // Check where the display is idled periodically.
+            // If so, set the frame rate category to NO_PREFERENCE
+            mHandler.sendEmptyMessageDelayed(MSG_CHECK_INVALIDATION_IDLE,
+                    FRAME_RATE_IDLENESS_CHECK_TIME_MILLIS);
+            mHasIdledMessage = true;
+        }
+    }
 }
diff --git a/core/tests/coretests/src/android/view/ViewRootImplTest.java b/core/tests/coretests/src/android/view/ViewRootImplTest.java
index 64cbe7f..7c58de6 100644
--- a/core/tests/coretests/src/android/view/ViewRootImplTest.java
+++ b/core/tests/coretests/src/android/view/ViewRootImplTest.java
@@ -1017,6 +1017,60 @@
         assertEquals(viewRootImpl.isFrameRatePowerSavingsBalanced(), true);
     }
 
+    /**
+     * Test the TextureView heuristic:
+     * 1. Store the last 3 invalidates time - FT1, FT2, FT3.
+     * 2. If FT2-FT1 > 15ms && FT3-FT2 > 15ms -> vote for NORMAL category
+     */
+    @Test
+    @RequiresFlagsEnabled(FLAG_TOOLKIT_SET_FRAME_RATE_READ_ONLY)
+    public void votePreferredFrameRate_applyTextureViewHeuristic() throws InterruptedException {
+        final long delay = 30L;
+
+        TextureView view = new TextureView(sContext);
+        WindowManager.LayoutParams wmlp = new WindowManager.LayoutParams(TYPE_APPLICATION_OVERLAY);
+        wmlp.token = new Binder(); // Set a fake token to bypass 'is your activity running' check
+
+        sInstrumentation.runOnMainSync(() -> {
+            WindowManager wm = sContext.getSystemService(WindowManager.class);
+            Display display = wm.getDefaultDisplay();
+            DisplayMetrics metrics = new DisplayMetrics();
+            display.getMetrics(metrics);
+            wmlp.width = (int) (metrics.widthPixels * 0.9);
+            wmlp.height = (int) (metrics.heightPixels * 0.9);
+            wm.addView(view, wmlp);
+        });
+        sInstrumentation.waitForIdleSync();
+
+        ViewRootImpl viewRootImpl = view.getViewRootImpl();
+
+        sInstrumentation.runOnMainSync(() -> {
+            assertEquals(viewRootImpl.getPreferredFrameRateCategory(),
+                    FRAME_RATE_CATEGORY_NO_PREFERENCE);
+            view.invalidate();
+            assertEquals(viewRootImpl.getPreferredFrameRateCategory(),
+                    FRAME_RATE_CATEGORY_HIGH);
+        });
+
+         // reset the frame rate category counts
+        for (int i = 0; i < 5; i++) {
+            Thread.sleep(delay);
+            sInstrumentation.runOnMainSync(() -> {
+                view.setRequestedFrameRate(view.REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE);
+                view.invalidate();
+            });
+            sInstrumentation.waitForIdleSync();
+        }
+
+        Thread.sleep(delay);
+        sInstrumentation.runOnMainSync(() -> {
+            view.setRequestedFrameRate(view.REQUESTED_FRAME_RATE_CATEGORY_DEFAULT);
+            view.invalidate();
+            assertEquals(viewRootImpl.getPreferredFrameRateCategory(),
+                    FRAME_RATE_CATEGORY_NORMAL);
+        });
+    }
+
     @Test
     public void forceInvertOffDarkThemeOff_forceDarkModeDisabled() {
         mSetFlagsRule.enableFlags(FLAG_FORCE_INVERT_COLOR);