content: /*
   * Copyright (C) 2016 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.decoder;
  
  import com.google.android.exoplayer2.C;
  
  /**
   * Base class for buffers with flags.
   */
  public abstract class Buffer {
  
    @C.BufferFlags
    private int flags;
  
    /**
     * Clears the buffer.
     */
    public void clear() {
      flags = 0;
    }
  
    /**
     * Returns whether the {@link C#BUFFER_FLAG_DECODE_ONLY} flag is set.
     */
    public final boolean isDecodeOnly() {
      return getFlag(C.BUFFER_FLAG_DECODE_ONLY);
    }
  
    /**
     * Returns whether the {@link C#BUFFER_FLAG_END_OF_STREAM} flag is set.
     */
    public final boolean isEndOfStream() {
      return getFlag(C.BUFFER_FLAG_END_OF_STREAM);
    }
  
    /**
     * Returns whether the {@link C#BUFFER_FLAG_KEY_FRAME} flag is set.
     */
    public final boolean isKeyFrame() {
      return getFlag(C.BUFFER_FLAG_KEY_FRAME);
    }
  
    /**
     * Replaces this buffer's flags with {@code flags}.
     *
     * @param flags The flags to set, which should be a combination of the {@code C.BUFFER_FLAG_*}
     *     constants.
     */
    public final void setFlags(@C.BufferFlags int flags) {
      this.flags = flags;
    }
  
    /**
     * Adds the {@code flag} to this buffer's flags.
     *
     * @param flag The flag to add to this buffer's flags, which should be one of the
     *     {@code C.BUFFER_FLAG_*} constants.
     */
    public final void addFlag(@C.BufferFlags int flag) {
      flags |= flag;
    }
  
    /**
     * Removes the {@code flag} from this buffer's flags, if it is set.
     *
     * @param flag The flag to remove.
     */
    public final void clearFlag(@C.BufferFlags int flag) {
      flags &= ~flag;
    }
  
    /**
     * Returns whether the specified flag has been set on this buffer.
     *
     * @param flag The flag to check.
     * @return Whether the flag is set.
     */
    protected final boolean getFlag(@C.BufferFlags int flag) {
      return (flags & flag) == flag;
    }
  
  }
  