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.source.dash;
  
  import android.os.SystemClock;
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.analytics.PlayerId;
  import com.google.android.exoplayer2.source.chunk.ChunkSource;
  import com.google.android.exoplayer2.source.dash.PlayerEmsgHandler.PlayerTrackEmsgHandler;
  import com.google.android.exoplayer2.source.dash.manifest.DashManifest;
  import com.google.android.exoplayer2.trackselection.ExoTrackSelection;
  import com.google.android.exoplayer2.upstream.LoaderErrorThrower;
  import com.google.android.exoplayer2.upstream.TransferListener;
  import java.util.List;
  
  /** A {@link ChunkSource} for DASH streams. */
  public interface DashChunkSource extends ChunkSource {
  
    /** Factory for {@link DashChunkSource}s. */
    interface Factory {
  
      /**
       * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
       * @param manifest The initial manifest.
       * @param baseUrlExclusionList The base URL exclusion list.
       * @param periodIndex The index of the corresponding period in the manifest.
       * @param adaptationSetIndices The indices of the corresponding adaptation sets in the period.
       * @param trackSelection The track selection.
       * @param trackType The {@link C.TrackType track type}.
       * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
       *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds,
       *     specified as the server's unix time minus the local elapsed time. Or {@link C#TIME_UNSET}
       *     if unknown.
       * @param enableEventMessageTrack Whether to output an event message track.
       * @param closedCaptionFormats The {@link Format Formats} of closed caption tracks to be output.
       * @param playerEmsgHandler The track output to write emsg messages to, or null if emsgs
       *     shouldn't be written.
       * @param transferListener The transfer listener which should be informed of any data transfers.
       *     May be null if no listener is available.
       * @param playerId The {@link PlayerId} of the player using this chunk source.
       * @return The created {@link DashChunkSource}.
       */
      DashChunkSource createDashChunkSource(
          LoaderErrorThrower manifestLoaderErrorThrower,
          DashManifest manifest,
          BaseUrlExclusionList baseUrlExclusionList,
          int periodIndex,
          int[] adaptationSetIndices,
          ExoTrackSelection trackSelection,
          @C.TrackType int trackType,
          long elapsedRealtimeOffsetMs,
          boolean enableEventMessageTrack,
          List<Format> closedCaptionFormats,
          @Nullable PlayerTrackEmsgHandler playerEmsgHandler,
          @Nullable TransferListener transferListener,
          PlayerId playerId);
    }
  
    /**
     * Updates the manifest.
     *
     * @param newManifest The new manifest.
     * @param newPeriodIndex The index of the period covered by {@code newManifest}.
     */
    void updateManifest(DashManifest newManifest, int newPeriodIndex);
  
    /**
     * Updates the track selection.
     *
     * @param trackSelection The new track selection instance. Must be equivalent to the previous one.
     */
    void updateTrackSelection(ExoTrackSelection trackSelection);
  }
  