content: /*
   * Copyright (C) 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 static com.google.android.exoplayer2.util.Assertions.checkArgument;
  
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.C;
  
  /** Immutable class for describing width and height dimensions in pixels. */
  public final class Size {
  
    /** A static instance to represent an unknown size value. */
    public static final Size UNKNOWN =
        new Size(/* width= */ C.LENGTH_UNSET, /* height= */ C.LENGTH_UNSET);
  
    /* A static instance to represent a size of zero height and width. */
    public static final Size ZERO = new Size(/* width= */ 0, /* height= */ 0);
  
    private final int width;
    private final int height;
  
    /**
     * Creates a new immutable Size instance.
     *
     * @param width The width of the size, in pixels, or {@link C#LENGTH_UNSET} if unknown.
     * @param height The height of the size, in pixels, or {@link C#LENGTH_UNSET} if unknown.
     * @throws IllegalArgumentException if an invalid {@code width} or {@code height} is specified.
     */
    public Size(int width, int height) {
      checkArgument(
          (width == C.LENGTH_UNSET || width >= 0) && (height == C.LENGTH_UNSET || height >= 0));
  
      this.width = width;
      this.height = height;
    }
  
    /** Returns the width of the size (in pixels), or {@link C#LENGTH_UNSET} if unknown. */
    public int getWidth() {
      return width;
    }
  
    /** Returns the height of the size (in pixels), or {@link C#LENGTH_UNSET} if unknown. */
    public int getHeight() {
      return height;
    }
  
    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj == null) {
        return false;
      }
      if (this == obj) {
        return true;
      }
      if (obj instanceof Size) {
        Size other = (Size) obj;
        return width == other.width && height == other.height;
      }
      return false;
    }
  
    @Override
    public String toString() {
      return width + "x" + height;
    }
  
    @Override
    public int hashCode() {
      // assuming most sizes are <2^16, doing a rotate will give us perfect hashing
      return height ^ ((width << (Integer.SIZE / 2)) | (width >>> (Integer.SIZE / 2)));
    }
  }
  