public BufferTask(DownloadFile downloadFile, int position) {
this.downloadFile = downloadFile;
this.position = position;
partialFile = downloadFile.getPartialFile();
// Calculate roughly how many bytes BUFFER_LENGTH_SECONDS corresponds to.
int bitRate = downloadFile.getBitRate();
long byteCount = Math.max(100000, bitRate * 1024 / 8 * BUFFER_LENGTH_SECONDS);
// Find out how large the file should grow before resuming playback.
expectedFileSize = partialFile.length() + byteCount;
}
