/*
 * Copyright (C) 2018 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 androidx.media3.exoplayer.hls.playlist;

import androidx.annotation.Nullable;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.exoplayer.upstream.ParsingLoadable;

/** Factory for {@link HlsPlaylist} parsers. */
@UnstableApi
public interface HlsPlaylistParserFactory {

  /**
   * Returns a stand-alone playlist parser. Playlists parsed by the returned parser do not inherit
   * any attributes from other playlists.
   */
  ParsingLoadable.Parser<HlsPlaylist> createPlaylistParser();

  /**
   * Returns a playlist parser for playlists that were referenced by the given {@link
   * HlsMultivariantPlaylist}. Returned {@link HlsMediaPlaylist} instances may inherit attributes
   * from {@code multivariantPlaylist}.
   *
   * @param multivariantPlaylist The multivariant playlist that referenced any parsed media
   *     playlists.
   * @param previousMediaPlaylist The previous media playlist or null if there is no previous media
   *     playlist.
   * @return A parser for HLS playlists.
   */
  ParsingLoadable.Parser<HlsPlaylist> createPlaylistParser(
      HlsMultivariantPlaylist multivariantPlaylist,
      @Nullable HlsMediaPlaylist previousMediaPlaylist);
}