/// <summary>
/// Determines was all the segments from range been downloaded
/// </summary>
/// <param name="startPos">File position from wich bytes should be read</param>
/// <param name="count"></param>
/// <param name="makeRequest">If true the not-finished segments will be marked as High-Priority segments</param>
/// <returns></returns>
protected bool CanRead(long startPos, int count, bool makeRequest = true)
{
if (!StorageContainer.Available)
{
return(false);
}
var startIndex = GetSegmentIndex(startPos, SegmentLength);
var endIndex = GetSegmentIndex(startPos + count - 1, SegmentLength);
lock (SyncRoot)
{
for (int i = startIndex; i <= endIndex; i++)
{
if (!StorageContainer.CanReadSegment(i) || !_downloadedSegments[i])
{
if (makeRequest)
{
if (!HighPrioritySegments.Contains(i))
{
Logger.Info("Add high priority segment {0}", i);
HighPrioritySegments.Add(i);
}
}
return(false);
}
}
return(true);
}
}
public void FinishSegment(int index, Source src)
{
if (index < 0 || index >= _totalSegmentsCount)
{
throw new InvalidOperationException();
}
bool downloadFinished;
lock (_syncRoot)
{
if (!_activeSegments[index] || _downloadedSegments[index])
{
return;
}
_activeSegmentsCount--;
_activeSegments[index] = false;
_doneSegmentsCount++;
_downloadedSegments[index] = true;
downloadFinished = _doneSegmentsCount == _totalSegmentsCount;
ActiveSources.Remove(src);
HighPrioritySegments.Remove(index);
}
OnSegmentFinished(new SegmentEventArgs
{
SegmentInfo = new SegmentInfo {
Index = index
},
DownloadItem = this,
Source = src
});
if (downloadFinished)
{
OnDownloadFinished();
}
}
