content: /*
   * Copyright 2022 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.google.android.exoplayer2.util;
  
  import android.view.SurfaceView;
  import androidx.annotation.Nullable;
  
  /** Provider for views to show diagnostic information during a transformation, for debugging. */
  public interface DebugViewProvider {
  
    /** Debug view provider that doesn't show any debug info. */
    DebugViewProvider NONE = (int width, int height) -> null;
  
    /**
     * Returns a new surface view to show a preview of transformer output with the given width/height
     * in pixels, or {@code null} if no debug information should be shown.
     *
     * <p>This method may be called on an arbitrary thread.
     */
    @Nullable
    SurfaceView getDebugPreviewSurfaceView(int width, int height);
  }
  