IList <BlockInfo> PriorityPick(IPeer peer, BitField available, IReadOnlyList <IPeer> otherPeers, int count, int startIndex, int endIndex)
{
BlockInfo? request;
IList <BlockInfo> bundle;
if (HighPriorityPieceIndex >= startIndex && HighPriorityPieceIndex <= endIndex)
{
var start = HighPriorityPieceIndex;
var end = Math.Min(endIndex, HighPriorityPieceIndex + HighPriorityCount - 1);
for (int prioritised = start; prioritised <= start + 1 && prioritised <= end; prioritised++)
{
if (available[prioritised])
{
if ((bundle = HighPriorityPicker.PickPiece(peer, available, otherPeers, count, prioritised, prioritised)) != null)
{
return(bundle);
}
if ((request = HighPriorityPicker.ContinueAnyExistingRequest(peer, prioritised, prioritised, 3)) != null)
{
return new[] { request.Value }
}
;
}
}
if ((bundle = HighPriorityPicker.PickPiece(peer, available, otherPeers, count, start, end)) != null)
{
return(bundle);
}
}
if (endIndex < HighPriorityPieceIndex)
{
return(null);
}
var lowPriorityEndIndex = Math.Min(HighPriorityPieceIndex + LowPriorityCount, endIndex);
if ((bundle = LowPriorityPicker.PickPiece(peer, available, otherPeers, count, HighPriorityPieceIndex, lowPriorityEndIndex)) != null)
{
return(bundle);
}
// If we're downloading from the 'not important at all' section, queue up at most 2.
if (peer.AmRequestingPiecesCount > 2)
{
return(null);
}
return(LowPriorityPicker.PickPiece(peer, available, otherPeers, count, HighPriorityPieceIndex, endIndex));
}
public void Initialise(ITorrentData torrentData, IReadOnlyList <BitField> ignoringBitfields)
{
TorrentData = torrentData;
var standardPicker = new StandardPicker();
HighPriorityPicker = IgnoringPicker.Wrap(new PriorityPicker(standardPicker), ignoringBitfields);
LowPriorityPicker = new RandomisedPicker(standardPicker);
LowPriorityPicker = new RarestFirstPicker(LowPriorityPicker);
LowPriorityPicker = new PriorityPicker(LowPriorityPicker);
LowPriorityPicker = IgnoringPicker.Wrap(LowPriorityPicker, ignoringBitfields);
LowPriorityPicker.Initialise(torrentData);
HighPriorityPicker.Initialise(torrentData);
}
int PriorityPick(IPeer peer, BitField available, IReadOnlyList <IPeer> otherPeers, int startIndex, int endIndex, Span <BlockInfo> requests)
{
BlockInfo?request;
int requestCount;
if (HighPriorityPieceIndex >= startIndex && HighPriorityPieceIndex <= endIndex)
{
var start = HighPriorityPieceIndex;
var end = Math.Min(endIndex, HighPriorityPieceIndex + HighPriorityCount - 1);
for (int prioritised = start; prioritised <= start + 1 && prioritised <= end; prioritised++)
{
if (available[prioritised])
{
if ((requestCount = HighPriorityPicker.PickPiece(peer, available, otherPeers, prioritised, prioritised, requests)) > 0)
{
return(requestCount);
}
if ((request = HighPriorityPicker.ContinueAnyExistingRequest(peer, prioritised, prioritised, 3)) != null)
{
requests[0] = request.Value;
return(1);
}
}
}
if ((requestCount = HighPriorityPicker.PickPiece(peer, available, otherPeers, start, end, requests)) > 0)
{
return(requestCount);
}
}
var lowPriorityEndIndex = Math.Min(HighPriorityPieceIndex + LowPriorityCount, endIndex);
if ((requestCount = LowPriorityPicker.PickPiece(peer, available, otherPeers, HighPriorityPieceIndex, lowPriorityEndIndex, requests)) > 0)
{
return(requestCount);
}
// If we're downloading from the 'not important at all' section, queue up at most 2.
if (peer.AmRequestingPiecesCount < 2)
{
return(LowPriorityPicker.PickPiece(peer, available, otherPeers, startIndex, endIndex, requests));
}
return(0);
}
public void Initialise(ITorrentManagerInfo torrentData, IReadOnlyList <ReadOnlyBitField> ignoringBitfields)
{
TorrentData = torrentData.TorrentInfo !;
IgnoringBitfields = ignoringBitfields;
Temp = new BitField(TorrentData.PieceCount());
var standardPicker = new StandardPicker();
HighPriorityPicker = IgnoringPicker.Wrap(new PriorityPicker(standardPicker), ignoringBitfields);
LowPriorityPicker = new RandomisedPicker(standardPicker);
LowPriorityPicker = new RarestFirstPicker(LowPriorityPicker);
LowPriorityPicker = new PriorityPicker(LowPriorityPicker);
LowPriorityPicker = IgnoringPicker.Wrap(LowPriorityPicker, ignoringBitfields);
LowPriorityPicker.Initialise(torrentData);
HighPriorityPicker.Initialise(torrentData);
}
