Add TextureOverlay.configure() to configure overlay before frame processing

This change allows an overlay to be sized with respect to the video dimensions.

PiperOrigin-RevId: 497337734

library/effect/src/androidTest/java/com/google/android/exoplayer2/effect/OverlayTextureProcessorPixelTest.java

@@ -150,14 +150,33 @@ public class OverlayTextureProcessorPixelTest {
   }
 
   @Test
-  public void drawFrame_scaledBitmapOverlay_blendsBitmapIntoFrame() throws Exception {
+  public void drawFrame_scaledBitmapOverlay_letterboxStretchesOverlay() throws Exception {
     String testId = "drawFrame_scaledBitmapOverlay";
     Bitmap overlayBitmap = readBitmap(OVERLAY_PNG_ASSET_PATH);
     float[] scaleMatrix = GlUtil.create4x4IdentityMatrix();
-    Matrix.scaleM(scaleMatrix, /* mOffset= */ 0, /* x= */ 3, /* y= */ 3, /* z= */ 1);
     OverlaySettings overlaySettings = new OverlaySettings.Builder().setMatrix(scaleMatrix).build();
     BitmapOverlay staticBitmapOverlay =
-        BitmapOverlay.createStaticBitmapOverlay(overlayBitmap, overlaySettings);
+        new BitmapOverlay() {
+          @Override
+          public Bitmap getBitmap(long presentationTimeUs) {
+            return overlayBitmap;
+          }
+
+          @Override
+          public void configure(Size videoSize) {
+            Matrix.scaleM(
+                scaleMatrix,
+                /* mOffset= */ 0,
+                /* x= */ videoSize.getWidth() / (float) overlayBitmap.getWidth(),
+                /* y= */ 1,
+                /* z= */ 1);
+          }
+
+          @Override
+          public OverlaySettings getOverlaySettings(long presentationTimeUs) {
+            return overlaySettings;
+          }
+        };
     overlayTextureProcessor =
         new OverlayEffect(ImmutableList.of(staticBitmapOverlay))
             .toGlTextureProcessor(context, /* useHdr= */ false);

library/effect/src/main/java/com/google/android/exoplayer2/effect/OverlayTextureProcessor.java

@@ -83,7 +83,11 @@ import com.google.common.collect.ImmutableList;
   public Size configure(int inputWidth, int inputHeight) {
     videoWidth = inputWidth;
     videoHeight = inputHeight;
-    return new Size(inputWidth, inputHeight);
+    Size videoSize = new Size(inputWidth, inputHeight);
+    for (TextureOverlay overlay : overlays) {
+      overlay.configure(videoSize);
+    }
+    return videoSize;
   }
 
   @Override

library/effect/src/main/java/com/google/android/exoplayer2/effect/TextureOverlay.java

@@ -40,6 +40,16 @@ public abstract class TextureOverlay {
   public abstract Size getTextureSize(long presentationTimeUs);
 
   /**
+   * Set up resources for the overlay given the input video’s dimensions.
+   *
+   * <p>This method will be called before drawing the first frame and before drawing subsequent
+   * frames with different input dimensions.
+   *
+   * @param videoSize The width and height of the input video, in pixels.
+   */
+  public void configure(Size videoSize) {}
+
+  /**
    * Returns the {@link OverlaySettings} controlling how the overlay is displayed at the specified
    * timestamp.
    *