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.metadata.scte35;
  
  import android.os.Parcel;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.util.ParsableByteArray;
  import com.google.android.exoplayer2.util.TimestampAdjuster;
  
  /**
   * Represents a time signal command as defined in SCTE35, Section 9.3.4.
   */
  public final class TimeSignalCommand extends SpliceCommand {
  
    /**
     * A PTS value, as defined in SCTE35, Section 9.3.4.
     */
    public final long ptsTime;
    /**
     * Equivalent to {@link #ptsTime} but in the playback timebase.
     */
    public final long playbackPositionUs;
  
    private TimeSignalCommand(long ptsTime, long playbackPositionUs) {
      this.ptsTime = ptsTime;
      this.playbackPositionUs = playbackPositionUs;
    }
  
    /* package */ static TimeSignalCommand parseFromSection(ParsableByteArray sectionData,
        long ptsAdjustment, TimestampAdjuster timestampAdjuster) {
      long ptsTime = parseSpliceTime(sectionData, ptsAdjustment);
      long playbackPositionUs = timestampAdjuster.adjustTsTimestamp(ptsTime);
      return new TimeSignalCommand(ptsTime, playbackPositionUs);
    }
  
    /**
     * Parses pts_time from splice_time(), defined in Section 9.4.1. Returns {@link C#TIME_UNSET}, if
     * time_specified_flag is false.
     *
     * @param sectionData The section data from which the pts_time is parsed.
     * @param ptsAdjustment The pts adjustment provided by the splice info section header.
     * @return The pts_time defined by splice_time(), or {@link C#TIME_UNSET}, if time_specified_flag
     *     is false.
     */
    /* package */ static long parseSpliceTime(ParsableByteArray sectionData, long ptsAdjustment) {
      long firstByte = sectionData.readUnsignedByte();
      long ptsTime = C.TIME_UNSET;
      if ((firstByte & 0x80) != 0 /* time_specified_flag */) {
        // See SCTE35 9.2.1 for more information about pts adjustment.
        ptsTime = (firstByte & 0x01) << 32 | sectionData.readUnsignedInt();
        ptsTime += ptsAdjustment;
        ptsTime &= 0x1FFFFFFFFL;
      }
      return ptsTime;
    }
  
    // Parcelable implementation.
  
    @Override
    public void writeToParcel(Parcel dest, int flags) {
      dest.writeLong(ptsTime);
      dest.writeLong(playbackPositionUs);
    }
  
    public static final Creator<TimeSignalCommand> CREATOR =
        new Creator<TimeSignalCommand>() {
  
      @Override
      public TimeSignalCommand createFromParcel(Parcel in) {
        return new TimeSignalCommand(in.readLong(), in.readLong());
      }
  
      @Override
      public TimeSignalCommand[] newArray(int size) {
        return new TimeSignalCommand[size];
      }
  
    };
  
  }
  