content: /*
   * Copyright (C) 2019 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.metadata.flac;
  
  import static com.google.android.exoplayer2.util.Util.castNonNull;
  
  import android.os.Parcel;
  import android.os.Parcelable;
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.MediaMetadata;
  import com.google.android.exoplayer2.metadata.Metadata;
  import com.google.android.exoplayer2.util.ParsableByteArray;
  import com.google.common.base.Charsets;
  import java.util.Arrays;
  
  /** A picture parsed from a Vorbis Comment or a FLAC picture block. */
  public final class PictureFrame implements Metadata.Entry {
  
    /** The type of the picture. */
    public final int pictureType;
    /** The mime type of the picture. */
    public final String mimeType;
    /** A description of the picture. */
    public final String description;
    /** The width of the picture in pixels. */
    public final int width;
    /** The height of the picture in pixels. */
    public final int height;
    /** The color depth of the picture in bits-per-pixel. */
    public final int depth;
    /** For indexed-color pictures (e.g. GIF), the number of colors used. 0 otherwise. */
    public final int colors;
    /** The encoded picture data. */
    public final byte[] pictureData;
  
    public PictureFrame(
        int pictureType,
        String mimeType,
        String description,
        int width,
        int height,
        int depth,
        int colors,
        byte[] pictureData) {
      this.pictureType = pictureType;
      this.mimeType = mimeType;
      this.description = description;
      this.width = width;
      this.height = height;
      this.depth = depth;
      this.colors = colors;
      this.pictureData = pictureData;
    }
  
    /* package */ PictureFrame(Parcel in) {
      this.pictureType = in.readInt();
      this.mimeType = castNonNull(in.readString());
      this.description = castNonNull(in.readString());
      this.width = in.readInt();
      this.height = in.readInt();
      this.depth = in.readInt();
      this.colors = in.readInt();
      this.pictureData = castNonNull(in.createByteArray());
    }
  
    @Override
    public void populateMediaMetadata(MediaMetadata.Builder builder) {
      builder.maybeSetArtworkData(pictureData, pictureType);
    }
  
    @Override
    public String toString() {
      return "Picture: mimeType=" + mimeType + ", description=" + description;
    }
  
    @Override
    public boolean equals(@Nullable Object obj) {
      if (this == obj) {
        return true;
      }
      if (obj == null || getClass() != obj.getClass()) {
        return false;
      }
      PictureFrame other = (PictureFrame) obj;
      return (pictureType == other.pictureType)
          && mimeType.equals(other.mimeType)
          && description.equals(other.description)
          && (width == other.width)
          && (height == other.height)
          && (depth == other.depth)
          && (colors == other.colors)
          && Arrays.equals(pictureData, other.pictureData);
    }
  
    @Override
    public int hashCode() {
      int result = 17;
      result = 31 * result + pictureType;
      result = 31 * result + mimeType.hashCode();
      result = 31 * result + description.hashCode();
      result = 31 * result + width;
      result = 31 * result + height;
      result = 31 * result + depth;
      result = 31 * result + colors;
      result = 31 * result + Arrays.hashCode(pictureData);
      return result;
    }
  
    @Override
    public void writeToParcel(Parcel dest, int flags) {
      dest.writeInt(pictureType);
      dest.writeString(mimeType);
      dest.writeString(description);
      dest.writeInt(width);
      dest.writeInt(height);
      dest.writeInt(depth);
      dest.writeInt(colors);
      dest.writeByteArray(pictureData);
    }
  
    @Override
    public int describeContents() {
      return 0;
    }
  
    /**
     * Parses a {@code METADATA_BLOCK_PICTURE} into a {@code PictureFrame} instance.
     *
     * <p>{@code pictureBlock} may be read directly from a <a
     * href="https://xiph.org/flac/format.html#metadata_block_picture">FLAC file</a>, or decoded from
     * the base64 content of a <a
     * href="https://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE">Vorbis Comment</a>.
     *
     * @param pictureBlock The data of the {@code METADATA_BLOCK_PICTURE}, not including any headers.
     * @return A {@code PictureFrame} parsed from {@code pictureBlock}.
     */
    public static PictureFrame fromPictureBlock(ParsableByteArray pictureBlock) {
      int pictureType = pictureBlock.readInt();
      int mimeTypeLength = pictureBlock.readInt();
      String mimeType = pictureBlock.readString(mimeTypeLength, Charsets.US_ASCII);
      int descriptionLength = pictureBlock.readInt();
      String description = pictureBlock.readString(descriptionLength);
      int width = pictureBlock.readInt();
      int height = pictureBlock.readInt();
      int depth = pictureBlock.readInt();
      int colors = pictureBlock.readInt();
      int pictureDataLength = pictureBlock.readInt();
      byte[] pictureData = new byte[pictureDataLength];
      pictureBlock.readBytes(pictureData, 0, pictureDataLength);
  
      return new PictureFrame(
          pictureType, mimeType, description, width, height, depth, colors, pictureData);
    }
  
    public static final Parcelable.Creator<PictureFrame> CREATOR =
        new Parcelable.Creator<PictureFrame>() {
  
          @Override
          public PictureFrame createFromParcel(Parcel in) {
            return new PictureFrame(in);
          }
  
          @Override
          public PictureFrame[] newArray(int size) {
            return new PictureFrame[size];
          }
        };
  }
  