mirror of
https://github.com/BililiveRecorder/BililiveRecorder.git
synced 2024-12-26 20:26:00 +08:00
317 lines
16 KiB
C#
317 lines
16 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Xml;
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using System.Xml.Linq;
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namespace BililiveRecorder.ToolBox.Tool.DanmakuMerger
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{
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public class DanmakuMergerHandler : ICommandHandler<DanmakuMergerRequest, DanmakuMergerResponse>
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{
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private static readonly string[] DanmakuElementNames = new[] { "d", "gift", "sc", "guard" };
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public string Name => "Merge Danmaku";
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#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
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public async Task<CommandResponse<DanmakuMergerResponse>> Handle(DanmakuMergerRequest request, CancellationToken cancellationToken, ProgressCallback? progress)
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#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
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{
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var inputLength = request.Inputs.Length;
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if (inputLength < 2)
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return new CommandResponse<DanmakuMergerResponse>
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{
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Status = ResponseStatus.Error,
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ErrorMessage = "At least 2 input files required"
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};
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if (request.Offsets is not null)
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{
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if (request.Offsets.Length != inputLength)
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{
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return new CommandResponse<DanmakuMergerResponse>
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{
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Status = ResponseStatus.Error,
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ErrorMessage = "The number of offsets should match the number of input files."
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};
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}
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}
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var files = new FileStream[inputLength];
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var readers = new XmlReader?[inputLength];
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FileStream? outputFile = null;
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XmlWriter? writer = null;
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XElement recordInfo;
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TimeSpan[] timeDiff;
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try // finally
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{
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// 读取文件开头并计算时间差
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try
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{
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DateTimeOffset baseTime;
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// 打开输入文件
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for (var i = 0; i < inputLength; i++)
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{
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var file = File.Open(request.Inputs[i], FileMode.Open, FileAccess.Read, FileShare.Read);
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files[i] = file;
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readers[i] = XmlReader.Create(file, null);
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}
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// 读取XML文件开头
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var startTimes = new (DateTimeOffset time, XElement element)[inputLength];
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for (var i = 0; i < inputLength; i++)
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{
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var r = readers[i]!;
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r.ReadStartElement("i");
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while (r.Name != "i")
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{
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if (r.Name == "BililiveRecorderRecordInfo")
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{
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var el = (XNode.ReadFrom(r) as XElement)!;
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var time = (DateTimeOffset)el.Attribute("start_time");
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startTimes[i] = (time, el);
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break;
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}
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else
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{
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r.Skip();
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}
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}
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}
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if (request.Offsets is not null)
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{
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// 使用传递进来的参数作为时间差
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timeDiff = request.Offsets.Select(x => TimeSpan.FromSeconds(x)).ToArray();
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var (time, element) = startTimes[Array.IndexOf(timeDiff, timeDiff.Min())];
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recordInfo = element;
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baseTime = time;
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}
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else
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{
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// 使用文件内的开始时间作为时间差
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var (time, element) = startTimes.OrderBy(x => x.time).First();
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recordInfo = element;
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baseTime = time;
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timeDiff = startTimes.Select(x => x.time - baseTime).ToArray();
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}
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}
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catch (Exception ex)
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{
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return new CommandResponse<DanmakuMergerResponse>
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{
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Status = ResponseStatus.InputIOError,
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Exception = ex,
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ErrorMessage = ex.Message
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};
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}
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try
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{
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// 打开输出文件
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outputFile = File.Open(request.Output, FileMode.Create, FileAccess.ReadWrite, FileShare.None);
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writer = XmlWriter.Create(outputFile, new XmlWriterSettings
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{
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Indent = true,
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IndentChars = " ",
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Encoding = Encoding.UTF8,
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CloseOutput = true,
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WriteEndDocumentOnClose = true,
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});
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// 写入文件开头
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writer.WriteStartDocument();
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writer.WriteProcessingInstruction("xml-stylesheet", "type=\"text/xsl\" href=\"#s\"");
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writer.WriteStartElement("i");
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writer.WriteComment("\nB站录播姬 " + GitVersionInformation.InformationalVersion + " 使用工具箱合并\nhttps://rec.danmuji.org/user/danmaku/\n本文件的弹幕信息兼容B站主站视频弹幕XML格式\n本XML自带样式可以在浏览器里打开（推荐使用Chrome）\n\nsc 为SuperChat\ngift为礼物\nguard为上船\n\nattribute \"raw\" 为原始数据\n");
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writer.WriteElementString("chatserver", "chat.bilibili.com");
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writer.WriteElementString("chatid", "0");
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writer.WriteElementString("mission", "0");
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writer.WriteElementString("maxlimit", "1000");
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writer.WriteElementString("state", "0");
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writer.WriteElementString("real_name", "0");
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writer.WriteElementString("source", "0");
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writer.WriteStartElement("BililiveRecorder");
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writer.WriteAttributeString("version", GitVersionInformation.FullSemVer);
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writer.WriteAttributeString("merged", "by toolbox");
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writer.WriteEndElement();
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// 写入直播间信息
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recordInfo.WriteTo(writer);
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// see BililiveRecorder.Core\Danmaku\BasicDanmakuWriter.cs
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const string style = @"<z:stylesheet version=""1.0"" id=""s"" xml:id=""s"" xmlns:z=""http://www.w3.org/1999/XSL/Transform""><z:output method=""html""/><z:template match=""/""><html><meta name=""viewport"" content=""width=device-width""/><title>B站录播姬弹幕文件 - <z:value-of select=""/i/BililiveRecorderRecordInfo/@name""/></title><style>body{margin:0}h1,h2,p,table{margin-left:5px}table{border-spacing:0}td,th{border:1px solid grey;padding:1px}th{position:sticky;top:0;background:#4098de}tr:hover{background:#d9f4ff}div{overflow:auto;max-height:80vh;max-width:100vw;width:fit-content}</style><h1><a href=""https://rec.danmuji.org"">B站录播姬</a>弹幕XML文件</h1><p>本文件不支持在 IE 浏览器里预览，请使用 Chrome Firefox Edge 等浏览器。</p><p>文件用法参考文档 <a href=""https://rec.danmuji.org/user/danmaku/"">https://rec.danmuji.org/user/danmaku/</a></p><table><tr><td>录播姬版本</td><td><z:value-of select=""/i/BililiveRecorder/@version""/></td></tr><tr><td>房间号</td><td><z:value-of select=""/i/BililiveRecorderRecordInfo/@roomid""/></td></tr><tr><td>主播名</td><td><z:value-of select=""/i/BililiveRecorderRecordInfo/@name""/></td></tr><tr><td>录制开始时间</td><td><z:value-of select=""/i/BililiveRecorderRecordInfo/@start_time""/></td></tr><tr><td><a href=""#d"">弹幕</a></td><td>共<z:value-of select=""count(/i/d)""/>条记录</td></tr><tr><td><a href=""#guard"">上船</a></td><td>共<z:value-of select=""count(/i/guard)""/>条记录</td></tr><tr><td><a href=""#sc"">SC</a></td><td>共<z:value-of select=""count(/i/sc)""/>条记录</td></tr><tr><td><a href=""#gift"">礼物</a></td><td>共<z:value-of select=""count(/i/gift)""/>条记录</td></tr></table><h2 id=""d"">弹幕</h2><div id=""dm""><table><tr><th>用户名</th><th>出现时间</th><th>弹幕</th><th>参数</th></tr><z:for-each select=""/i/d""><tr><td><z:value-of select=""@user""/></td><td></td><td><z:value-of select="".""/></td><td><z:value-of select=""@p""/></td></tr></z:for-each></table></div><script>Array.from(document.querySelectorAll('#dm tr')).slice(1).map(t=>t.querySelectorAll('td')).forEach(t=>{let a=t[3].textContent.split(',')[0];t[1].textContent=`${(Math.floor(a/60/60)+'').padStart(2,0)}:${(Math.floor(a/60%60)+'').padStart(2,0)}:${(a%60).toFixed(3).padStart(6,0)}`})</script><h2 id=""guard"">舰长购买</h2><div><table><tr><th>用户名</th><th>用户ID</th><th>舰长等级</th><th>购买数量</th><th>出现时间</th></tr><z:for-each select=""/i/guard""><tr><td><z:value-of select=""@user""/></td><td><z:value-of select=""@uid""/></td><td><z:value-of select=""@level""/></td><td><z:value-of select=""@count""/></td><td><z:value-of select=""@ts""/></td></tr></z:for-each></table></div><h2 id=""sc"">SuperChat 醒目留言</h2><div><table><tr><th>用户名</th><th>用户ID</th><th>内容</th><th>显示时长</th><th>价格</th><th>出现时间</th></tr><z:for-each select=""/i/sc""><tr><td><z:value-of select=""@user""/></td><td><z:value-of select="".""/></td><td><z:value-of select=""@time""/></td><td><z:value-of select=""@price""/></td><td><z:value-of select=""@ts""/></td></tr></z:for-each></table></div><h2 id=""gift"">礼物</h2><div><table><tr><th>用户名</th><th>用户ID</th><th>礼物名</th><th>礼物数量</th><th>出现时间</th></tr><z:for-each select=""/i/gift""><tr><td><z:value-of select=""@user""/></td><td><z:value-of select=""@uid""/></td><td><z:value-of select=""@giftname""/></td><td><z:value-of select=""@giftcount""/></td><td><z:value-of select=""@ts""/></td></tr></z:for-each></table></div></html></z:template></z:stylesheet>";
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writer.WriteStartElement("BililiveRecorderXmlStyle");
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writer.WriteRaw(style);
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writer.WriteEndElement();
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}
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catch (Exception ex)
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{
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return new CommandResponse<DanmakuMergerResponse>
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{
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Status = ResponseStatus.OutputIOError,
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Exception = ex,
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ErrorMessage = ex.Message
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};
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}
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try
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{
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var els = new List<(TimeSpan time, XElement el, int reader)>();
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// 取出所有文件里第一条数据
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for (var i = 0; i < inputLength; i++)
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{
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var r = readers[i]!;
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var el = ReadDanmakuElement(r);
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if (el is null)
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{
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readers[i] = null;
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continue;
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}
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var time = UpdateTimestamp(el, timeDiff[i]);
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els.Add((time, el, i));
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}
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// 排序
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els.Sort((a, b) => a.time.CompareTo(b.time));
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while (true)
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{
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// 写入时间最小的数据
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// 所有数据写完就退出循环
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if (els.Count == 0)
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break;
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(var time, var el, var readerIndex) = els[0];
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el.WriteTo(writer);
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els.RemoveAt(0);
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// 读取一个新的数据
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var reader = readers[readerIndex];
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// 检查这个文件是否还有更多数据
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if (reader is not null)
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{
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readNextElementFromSameReader:
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var newEl = ReadDanmakuElement(reader);
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if (newEl is null)
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{
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// 文件已结束
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reader.Dispose();
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readers[readerIndex] = null;
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continue;
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}
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else
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{
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// 计算新的时间
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var newTime = UpdateTimestamp(newEl, timeDiff[readerIndex]);
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if (els.Count < 1 || newTime < els[0].time)
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{
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// 如果这是最后一个文件，或当前数据的时间是所有数据里最小的
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// 直接写入输出文件
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newEl.WriteTo(writer);
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goto readNextElementFromSameReader;
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}
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else
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{
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// 如果其他数据比本数据的时间更小
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// 添加到列表中，后面排序再来
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els.Add((newTime, newEl, readerIndex));
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els.Sort((a, b) => a.time.CompareTo(b.time));
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}
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}
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}
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}
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}
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catch (Exception ex)
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{
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return new CommandResponse<DanmakuMergerResponse>
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{
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Status = ResponseStatus.Error,
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Exception = ex,
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ErrorMessage = ex.Message
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};
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}
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return new CommandResponse<DanmakuMergerResponse> { Status = ResponseStatus.OK, Data = new DanmakuMergerResponse() };
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}
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finally
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{
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try
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{
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writer?.Dispose();
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outputFile?.Dispose();
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}
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catch (Exception) { }
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for (var i = 0; i < inputLength; i++)
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{
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try
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{
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readers[i]?.Dispose();
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files[i]?.Dispose();
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}
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catch (Exception) { }
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}
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}
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}
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private static XElement? ReadDanmakuElement(XmlReader r)
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{
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while (r.Name != "i")
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{
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if (DanmakuElementNames.Contains(r.Name))
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{
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var el = (XNode.ReadFrom(r) as XElement)!;
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return el;
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}
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else
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{
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r.Skip();
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}
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}
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return null;
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}
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private static TimeSpan UpdateTimestamp(XElement element, TimeSpan offset)
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{
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switch (element.Name.LocalName)
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{
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case "d":
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{
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var p = element.Attribute("p");
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var i = p.Value.IndexOf(',');
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var t = TimeSpan.FromSeconds(double.Parse(p.Value.Substring(0, i)));
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t += offset;
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p.Value = t.TotalSeconds.ToString("F3") + p.Value.Substring(i);
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return t;
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}
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case "gift":
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case "sc":
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case "guard":
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{
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var ts = TimeSpan.FromSeconds((double)element.Attribute("ts"));
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ts += offset;
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element.SetAttributeValue("ts", ts.TotalSeconds.ToString("F3"));
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return ts;
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}
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default:
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return default;
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}
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}
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}
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}
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