Improvements to preview scaling on IMS video calls.

This is a partial rollback of previous attempts to fix preview scaling in cl/161444534 and cl/157891853.

The scaling issue was partially due to issues beneath the application, see b/63518188.

By rolling back the previous attempts, this CL improves preview scaling across all devices and OS's (assuming O builds after Aug 3).

There are still some very slight and intermittent scaling issues which we believe to be caused by the system but this CL is strictly a huge improvement. See b/63518188 for details.

Bug: 63518188
Test: manual
PiperOrigin-RevId: 165045984
Change-Id: I8e53870077e2ae86b10cd934f9f3b4508eb60ac3

2 files changed, 31 insertions, 27 deletions

diff --git a/java/com/android/incallui/video/impl/VideoCallFragment.java b/java/com/android/incallui/video/impl/VideoCallFragment.java
index 84e01bd31..b0beb77c1 100644
--- a/java/com/android/incallui/video/impl/VideoCallFragment.java
+++ b/java/com/android/incallui/video/impl/VideoCallFragment.java
@@ -21,7 +21,6 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
-import android.graphics.Matrix;
 import android.graphics.Outline;
 import android.graphics.Point;
 import android.graphics.drawable.Animatable;
@@ -284,7 +283,7 @@ public class VideoCallFragment extends Fragment
               int oldRight,
               int oldBottom) {
             LogUtil.i("VideoCallFragment.onLayoutChange", "previewTextureView layout changed");
-            fixPreviewRotation();
+            updatePreviewVideoScaling();
             updatePreviewOffView();
           }
         });
@@ -689,11 +688,13 @@ public class VideoCallFragment extends Fragment
   @Override
   public void onLocalVideoDimensionsChanged() {
     LogUtil.i("VideoCallFragment.onLocalVideoDimensionsChanged", null);
+    updatePreviewVideoScaling();
   }
 
   @Override
   public void onLocalVideoOrientationChanged() {
     LogUtil.i("VideoCallFragment.onLocalVideoOrientationChanged", null);
+    updatePreviewVideoScaling();
   }
 
   /** Called when the remote video's dimensions change. */
@@ -961,15 +962,31 @@ public class VideoCallFragment extends Fragment
     // Do nothing
   }
 
-  private void fixPreviewRotation() {
-    int rotationDegrees = getRotationDegrees();
-    if (rotationDegrees == 90 || rotationDegrees == 270) {
-      int viewWidth = previewTextureView.getWidth();
-      int viewHeight = previewTextureView.getHeight();
-      Matrix transform = new Matrix();
-      // Multiplying by -1 prevents the image from being upside down in landscape mode.
-      transform.postRotate(rotationDegrees * -1.0f, viewWidth / 2.0f, viewHeight / 2.0f);
-      previewTextureView.setTransform(transform);
+  private void updatePreviewVideoScaling() {
+    if (previewTextureView.getWidth() == 0 || previewTextureView.getHeight() == 0) {
+      LogUtil.i("VideoCallFragment.updatePreviewVideoScaling", "view layout hasn't finished yet");
+      return;
+    }
+    VideoSurfaceTexture localVideoSurfaceTexture =
+        videoCallScreenDelegate.getLocalVideoSurfaceTexture();
+    Point cameraDimensions = localVideoSurfaceTexture.getSurfaceDimensions();
+    if (cameraDimensions == null) {
+      LogUtil.i(
+          "VideoCallFragment.updatePreviewVideoScaling", "camera dimensions haven't been set");
+      return;
+    }
+    if (isLandscape()) {
+      VideoSurfaceBindings.scaleVideoAndFillView(
+          previewTextureView,
+          cameraDimensions.x,
+          cameraDimensions.y,
+          videoCallScreenDelegate.getDeviceOrientation());
+    } else {
+      VideoSurfaceBindings.scaleVideoAndFillView(
+          previewTextureView,
+          cameraDimensions.y,
+          cameraDimensions.x,
+          videoCallScreenDelegate.getDeviceOrientation());
     }
   }
 
@@ -1006,22 +1023,6 @@ public class VideoCallFragment extends Fragment
     return rotation == Surface.ROTATION_90 || rotation == Surface.ROTATION_270;
   }
 
-  private int getRotationDegrees() {
-    int rotation = getActivity().getWindowManager().getDefaultDisplay().getRotation();
-    switch (rotation) {
-      case Surface.ROTATION_0:
-        return 0;
-      case Surface.ROTATION_90:
-        return 90;
-      case Surface.ROTATION_180:
-        return 180;
-      case Surface.ROTATION_270:
-        return 270;
-      default:
-        throw Assert.createAssertionFailException("unsupported rotation: " + rotation);
-    }
-  }
-
   private void enterGreenScreenMode() {
     LogUtil.i("VideoCallFragment.enterGreenScreenMode", null);
     RelativeLayout.LayoutParams params =
diff --git a/java/com/android/incallui/videosurface/impl/VideoSurfaceTextureImpl.java b/java/com/android/incallui/videosurface/impl/VideoSurfaceTextureImpl.java
index 1af7dff4f..8cac40229 100644
--- a/java/com/android/incallui/videosurface/impl/VideoSurfaceTextureImpl.java
+++ b/java/com/android/incallui/videosurface/impl/VideoSurfaceTextureImpl.java
@@ -67,6 +67,9 @@ public class VideoSurfaceTextureImpl implements VideoSurfaceTexture {
         "VideoSurfaceTextureImpl.setSurfaceDimensions",
         "surfaceDimensions: " + surfaceDimensions + " " + toString());
     this.surfaceDimensions = surfaceDimensions;
+    if (surfaceDimensions != null && savedSurfaceTexture != null) {
+      savedSurfaceTexture.setDefaultBufferSize(surfaceDimensions.x, surfaceDimensions.y);
+    }
   }
 
   @Override