import com.google.android.exoplayer.upstream.Allocation; //导入依赖的package包/类
/**
 * Reads data from the front of the rolling buffer.
 *
 * @param absolutePosition The absolute position from which data should be read.
 * @param target The buffer into which data should be written.
 * @param length The number of bytes to read.
 */
private void readData(long absolutePosition, ByteBuffer target, int length,String mimeType) {
  int remaining = length;
  while (remaining > 0) {
    dropDownstreamTo(absolutePosition);
    int positionInAllocation = (int) (absolutePosition - totalBytesDropped);
    int toCopy = Math.min(remaining, allocationLength - positionInAllocation);
    Allocation allocation = dataQueue.peek();
    if (mimeType.contains("video")){
      target.put(allocation.data, allocation.translateOffset(positionInAllocation), toCopy);
    }else {
      target.put(allocation.data, allocation.translateOffset(positionInAllocation), toCopy);
    }
    absolutePosition += toCopy;
    remaining -= toCopy;
  }
}
 

import com.google.android.exoplayer.upstream.Allocation; //导入依赖的package包/类
/**
 * Reads data from the front of the rolling buffer.
 *
 * @param absolutePosition The absolute position from which data should be read.
 * @param target The buffer into which data should be written.
 * @param length The number of bytes to read.
 */
private void readData(long absolutePosition, ByteBuffer target, int length) {
  int remaining = length;
  while (remaining > 0) {
    dropDownstreamTo(absolutePosition);
    int positionInAllocation = (int) (absolutePosition - totalBytesDropped);
    int toCopy = Math.min(remaining, allocationLength - positionInAllocation);
    Allocation allocation = dataQueue.peek();
    target.put(allocation.data, allocation.translateOffset(positionInAllocation), toCopy);
    absolutePosition += toCopy;
    remaining -= toCopy;
  }
}