using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using BililiveRecorder.Flv.Amf;
namespace BililiveRecorder.Flv.Pipeline.Rules
{
///
/// 处理收到 Script Tag 的情况
///
///
/// 本规则为一般规则
///
public class HandleNewScriptRule : ISimpleProcessingRule
{
public Task RunAsync(FlvProcessingContext context, Func next)
{
if (context.OriginalInput is PipelineScriptAction scriptAction)
{
var data = scriptAction.Tag.ScriptData;
if (!(data is null)
&& data.Values.Count == 2
&& data.Values[0] is ScriptDataString name
&& name == "onMetaData")
{
ScriptDataEcmaArray? value = data.Values[1] switch
{
ScriptDataObject obj => obj,
ScriptDataEcmaArray arr => arr,
_ => null
};
if (value is null)
value = new ScriptDataEcmaArray();
context.ClearOutput();
context.AddNewFileAtStart();
context.Output.Add(new PipelineScriptAction(new Tag
{
Type = TagType.Script,
ScriptData = new ScriptTagBody(new List
{
name,
value
})
}));
}
else
{
context.AddComment("收到了非 onMetaData 的 Script Tag");
context.ClearOutput();
}
return Task.CompletedTask;
}
else
return next();
}
}
}