import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
/***
 * 是否TYPE_SOURCE 异常
 *
 * @param e 异常
 * @return boolean boolean
 */
public static boolean isBehindLiveWindow(@NonNull ExoPlaybackException e) {
    if (e.type != ExoPlaybackException.TYPE_SOURCE) {
        return false;
    }
    Throwable cause = e.getSourceException();
    while (cause != null) {
        if (cause instanceof BehindLiveWindowException) {
            return true;
        }
        cause = cause.getCause();
    }
    return false;
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
private static boolean isBehindLiveWindow(ExoPlaybackException e) {
    if (e.type != ExoPlaybackException.TYPE_SOURCE) {
        return false;
    }
    Throwable cause = e.getSourceException();
    while (cause != null) {
        if (cause instanceof BehindLiveWindowException) {
            return true;
        }
        cause = cause.getCause();
    }
    return false;
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
@Override
public void updateManifest(DashManifest newManifest, int newPeriodIndex) {
  try {
    manifest = newManifest;
    periodIndex = newPeriodIndex;
    long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
    List<Representation> representations = getAdaptationSet().representations;
    for (int i = 0; i < representationHolders.length; i++) {
      Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
      representationHolders[i].updateRepresentation(periodDurationUs, representation);
    }
  } catch (BehindLiveWindowException e) {
    fatalError = e;
  }
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
@Override
public void updateManifest(DashManifest newManifest, int newPeriodIndex) {
  try {
    manifest = newManifest;
    periodIndex = newPeriodIndex;
    long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
    List<Representation> representations = getRepresentations();
    for (int i = 0; i < representationHolders.length; i++) {
      Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
      representationHolders[i].updateRepresentation(periodDurationUs, representation);
    }
  } catch (BehindLiveWindowException e) {
    fatalError = e;
  }
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
public void updateRepresentation(long newPeriodDurationUs, Representation newRepresentation)
    throws BehindLiveWindowException{
  DashSegmentIndex oldIndex = representation.getIndex();
  DashSegmentIndex newIndex = newRepresentation.getIndex();

  periodDurationUs = newPeriodDurationUs;
  representation = newRepresentation;
  if (oldIndex == null) {
    // Segment numbers cannot shift if the index isn't defined by the manifest.
    return;
  }

  segmentIndex = newIndex;
  if (!oldIndex.isExplicit()) {
    // Segment numbers cannot shift if the index isn't explicit.
    return;
  }

  int oldIndexLastSegmentNum = oldIndex.getLastSegmentNum(periodDurationUs);
  long oldIndexEndTimeUs = oldIndex.getTimeUs(oldIndexLastSegmentNum)
      + oldIndex.getDurationUs(oldIndexLastSegmentNum, periodDurationUs);
  int newIndexFirstSegmentNum = newIndex.getFirstSegmentNum();
  long newIndexStartTimeUs = newIndex.getTimeUs(newIndexFirstSegmentNum);
  if (oldIndexEndTimeUs == newIndexStartTimeUs) {
    // The new index continues where the old one ended, with no overlap.
    segmentNumShift += oldIndex.getLastSegmentNum(periodDurationUs) + 1
        - newIndexFirstSegmentNum;
  } else if (oldIndexEndTimeUs < newIndexStartTimeUs) {
    // There's a gap between the old index and the new one which means we've slipped behind the
    // live window and can't proceed.
    throw new BehindLiveWindowException();
  } else {
    // The new index overlaps with the old one.
    segmentNumShift += oldIndex.getSegmentNum(newIndexStartTimeUs, periodDurationUs)
        - newIndexFirstSegmentNum;
  }
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
private static boolean isBehindLiveWindow(ExoPlaybackException e) {
  if (e.type != ExoPlaybackException.TYPE_SOURCE) {
    return false;
  }
  Throwable cause = e.getSourceException();
  while (cause != null) {
    if (cause instanceof BehindLiveWindowException) {
      return true;
    }
    cause = cause.getCause();
  }
  return false;
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
public void updateRepresentation(long newPeriodDurationUs, Representation newRepresentation)
    throws BehindLiveWindowException{
  DashSegmentIndex oldIndex = representation.getIndex();
  DashSegmentIndex newIndex = newRepresentation.getIndex();

  periodDurationUs = newPeriodDurationUs;
  representation = newRepresentation;
  if (oldIndex == null) {
    // Segment numbers cannot shift if the index isn't defined by the manifest.
    return;
  }

  segmentIndex = newIndex;
  if (!oldIndex.isExplicit()) {
    // Segment numbers cannot shift if the index isn't explicit.
    return;
  }

  int oldIndexSegmentCount = oldIndex.getSegmentCount(periodDurationUs);
  if (oldIndexSegmentCount == 0) {
    // Segment numbers cannot shift if the old index was empty.
    return;
  }

  int oldIndexLastSegmentNum = oldIndex.getFirstSegmentNum() + oldIndexSegmentCount - 1;
  long oldIndexEndTimeUs = oldIndex.getTimeUs(oldIndexLastSegmentNum)
      + oldIndex.getDurationUs(oldIndexLastSegmentNum, periodDurationUs);
  int newIndexFirstSegmentNum = newIndex.getFirstSegmentNum();
  long newIndexStartTimeUs = newIndex.getTimeUs(newIndexFirstSegmentNum);
  if (oldIndexEndTimeUs == newIndexStartTimeUs) {
    // The new index continues where the old one ended, with no overlap.
    segmentNumShift += oldIndexLastSegmentNum + 1 - newIndexFirstSegmentNum;
  } else if (oldIndexEndTimeUs < newIndexStartTimeUs) {
    // There's a gap between the old index and the new one which means we've slipped behind the
    // live window and can't proceed.
    throw new BehindLiveWindowException();
  } else {
    // The new index overlaps with the old one.
    segmentNumShift += oldIndex.getSegmentNum(newIndexStartTimeUs, periodDurationUs)
        - newIndexFirstSegmentNum;
  }
}
 

import com.google.android.exoplayer2.source.BehindLiveWindowException; //导入依赖的package包/类
void updateRepresentation(long newPeriodDurationUs,
    Representation newRepresentation) throws BehindLiveWindowException {
  DashSegmentIndex oldIndex = representation.getIndex();
  DashSegmentIndex newIndex = newRepresentation.getIndex();

  periodDurationUs = newPeriodDurationUs;
  representation = newRepresentation;
  if (oldIndex == null) {
    // Segment numbers cannot shift if the index isn't defined by the manifest.
    return;
  }

  segmentIndex = newIndex;
  if (!oldIndex.isExplicit()) {
    // Segment numbers cannot shift if the index isn't explicit.
    return;
  }

  int oldIndexSegmentCount = oldIndex.getSegmentCount(periodDurationUs);
  if (oldIndexSegmentCount == 0) {
    // Segment numbers cannot shift if the old index was empty.
    return;
  }

  int oldIndexLastSegmentNum = oldIndex.getFirstSegmentNum() + oldIndexSegmentCount - 1;
  long oldIndexEndTimeUs = oldIndex.getTimeUs(oldIndexLastSegmentNum)
      + oldIndex.getDurationUs(oldIndexLastSegmentNum, periodDurationUs);
  int newIndexFirstSegmentNum = newIndex.getFirstSegmentNum();
  long newIndexStartTimeUs = newIndex.getTimeUs(newIndexFirstSegmentNum);
  if (oldIndexEndTimeUs == newIndexStartTimeUs) {
    // The new index continues where the old one ended, with no overlap.
    segmentNumShift += oldIndexLastSegmentNum + 1 - newIndexFirstSegmentNum;
  } else if (oldIndexEndTimeUs < newIndexStartTimeUs) {
    // There's a gap between the old index and the new one which means we've slipped behind the
    // live window and can't proceed.
    throw new BehindLiveWindowException();
  } else {
    // The new index overlaps with the old one.
    segmentNumShift += oldIndex.getSegmentNum(newIndexStartTimeUs, periodDurationUs)
        - newIndexFirstSegmentNum;
  }
}