120 lines
3.2 KiB
C#
Executable File
120 lines
3.2 KiB
C#
Executable File
#region Copyright & License Information
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/*
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* Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.IO;
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using OpenRA.FileFormats;
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using OpenRA.Primitives;
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namespace OpenRA.Network
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{
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public sealed class ReplayConnection : IConnection
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{
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class Chunk
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{
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public int Frame;
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public List<Pair<int, byte[]>> Packets = new List<Pair<int, byte[]>>();
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}
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Queue<Chunk> chunks = new Queue<Chunk>();
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List<byte[]> sync = new List<byte[]>();
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int ordersFrame;
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public int LocalClientId { get { return 0; } }
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public ConnectionState ConnectionState { get { return ConnectionState.Connected; } }
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public readonly int TickCount;
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public readonly bool IsValid;
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public readonly Session LobbyInfo;
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public readonly string Filename;
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public ReplayConnection(string replayFilename)
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{
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Filename = replayFilename;
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// Parse replay data into a struct that can be fed to the game in chunks
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// to avoid issues with all immediate orders being resolved on the first tick.
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using (var rs = File.OpenRead(replayFilename))
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{
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var chunk = new Chunk();
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while (rs.Position < rs.Length)
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{
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var client = rs.ReadInt32();
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if (client == ReplayMetadata.MetaStartMarker)
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break;
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var packetLen = rs.ReadInt32();
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var packet = rs.ReadBytes(packetLen);
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var frame = BitConverter.ToInt32(packet, 0);
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chunk.Packets.Add(Pair.New(client, packet));
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if (packet.Length == 5 && packet[4] == 0xBF)
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continue; // disconnect
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else if (packet.Length >= 5 && packet[4] == 0x65)
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continue; // sync
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else if (frame == 0)
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{
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// Parse replay metadata from orders stream
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var orders = packet.ToOrderList(null);
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foreach (var o in orders)
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{
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if (o.OrderString == "StartGame")
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IsValid = true;
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else if (o.OrderString == "SyncInfo" && !IsValid)
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LobbyInfo = Session.Deserialize(o.TargetString);
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}
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}
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else
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{
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// Regular order - finalize the chunk
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chunk.Frame = frame;
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chunks.Enqueue(chunk);
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chunk = new Chunk();
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TickCount = Math.Max(TickCount, frame);
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}
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}
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}
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ordersFrame = LobbyInfo.GlobalSettings.OrderLatency;
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}
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// Do nothing: ignore locally generated orders
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public void Send(int frame, List<byte[]> orders) { }
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public void SendImmediate(List<byte[]> orders) { }
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public void SendSync(int frame, byte[] syncData)
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{
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var ms = new MemoryStream();
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ms.Write(BitConverter.GetBytes(frame));
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ms.Write(syncData);
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sync.Add(ms.ToArray());
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// Store the current frame so Receive() can return the next chunk of orders.
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ordersFrame = frame + LobbyInfo.GlobalSettings.OrderLatency;
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}
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public void Receive(Action<int, byte[]> packetFn)
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{
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while (sync.Count != 0)
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{
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packetFn(LocalClientId, sync[0]);
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sync.RemoveAt(0);
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}
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while (chunks.Count != 0 && chunks.Peek().Frame <= ordersFrame)
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foreach (var o in chunks.Dequeue().Packets)
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packetFn(o.First, o.Second);
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}
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public void Dispose() { }
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}
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}
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