5d91b678bb
Also avoid ReadBytes calls that allocate a buffer by either updating the stream position (if not interested in the bytes), by reusing an input buffer (if interested in the bytes), or using a stackalloc buffer to avoid the allocation (for small reads).
120 lines
2.8 KiB
C#
120 lines
2.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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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, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.IO;
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using System.Linq;
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using OpenRA.FileFormats;
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namespace OpenRA.Network
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{
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public sealed class ReplayRecorder
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{
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// Arbitrary value.
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const int CreateReplayFileMaxRetryCount = 128;
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public ReplayMetadata Metadata;
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BinaryWriter writer;
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readonly Func<string> chooseFilename;
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MemoryStream preStartBuffer = new();
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static bool IsGameStart(byte[] data)
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{
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if (!OrderIO.TryParseOrderPacket(data, out var orders))
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return false;
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return orders.Frame == 0 && orders.Orders.GetOrders(null).Any(o => o.OrderString == "StartGame");
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}
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public ReplayRecorder(Func<string> chooseFilename)
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{
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this.chooseFilename = chooseFilename;
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writer = new BinaryWriter(preStartBuffer);
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}
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void StartSavingReplay(byte[] initialContent)
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{
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var filename = chooseFilename();
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var mod = Game.ModData.Manifest;
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var dir = Path.Combine(Platform.SupportDir, "Replays", mod.Id, mod.Metadata.Version);
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if (!Directory.Exists(dir))
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Directory.CreateDirectory(dir);
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FileStream file = null;
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var id = -1;
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while (file == null)
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{
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var fullFilename = Path.Combine(dir, id < 0 ? $"{filename}.orarep" : $"{filename}-{id}.orarep");
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id++;
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try
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{
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file = File.Create(fullFilename);
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}
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catch (IOException ex)
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{
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if (id > CreateReplayFileMaxRetryCount)
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throw new ArgumentException($"Error creating replay file \"{filename}.orarep\"", ex);
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}
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}
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file.Write(initialContent);
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writer = new BinaryWriter(file);
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}
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public void Receive(int clientID, byte[] data)
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{
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if (disposed) // TODO: This can be removed once NetworkConnection is fixed to dispose properly.
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return;
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if (preStartBuffer != null && IsGameStart(data))
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{
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writer.Flush();
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var preStartData = preStartBuffer.ToArray();
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preStartBuffer = null;
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StartSavingReplay(preStartData);
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}
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writer.Write(clientID);
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writer.Write(data.Length);
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writer.Write(data);
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}
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public void ReceiveFrame(int clientID, int frame, byte[] data)
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{
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var ms = new MemoryStream(4 + data.Length);
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ms.Write(frame);
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ms.Write(data);
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Receive(clientID, ms.GetBuffer());
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}
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bool disposed;
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public void Dispose()
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{
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if (disposed)
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return;
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disposed = true;
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if (Metadata != null)
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{
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if (Metadata.GameInfo != null)
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Metadata.GameInfo.EndTimeUtc = DateTime.UtcNow;
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Metadata.Write(writer);
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}
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preStartBuffer?.Dispose();
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writer.Close();
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}
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}
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}
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