Merge pull request #368 from huynhsontung/playlist-parse-timeout

fix: better handle sub media parsing

Screenbox.Core/Helpers/VlcMediaExtensions.cs

@@ -0,0 +1,41 @@
+using LibVLCSharp.Shared;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Screenbox.Core.Helpers;
+internal static class VlcMediaExtensions
+{
+    public static async Task ParseAsync(this Media media, TimeSpan timeout, CancellationToken cancellationToken = default)
+    {
+        // Check if media is already parsed
+        if (media.IsParsed && media.ParsedStatus is MediaParsedStatus.Done or MediaParsedStatus.Failed)
+            return;
+
+        await media.Parse(MediaParseOptions.ParseNetwork, (int)timeout.TotalMilliseconds, cancellationToken);
+        cancellationToken.ThrowIfCancellationRequested();
+
+        // Media may not be parsed even after calling Parse()
+        // This can happen if the media is being open at the same time.
+        if (media.IsParsed && media.ParsedStatus != MediaParsedStatus.Skipped)
+            return;
+
+        // Wait for the ParsedStatus to change again.
+        TaskCompletionSource<MediaParsedStatus> tsc = new();
+        Task task = tsc.Task;
+
+        media.ParsedChanged += MediaOnParsedChanged;
+
+        if (await Task.WhenAny(tsc.Task, Task.Delay(timeout, cancellationToken)) != task)
+        {
+            tsc.SetCanceled();
+        }
+
+        return;
+
+        void MediaOnParsedChanged(object sender, MediaParsedChangedEventArgs e)
+        {
+            tsc.TrySetResult(e.ParsedStatus);
+        }
+    }
+}

Screenbox.Core/Screenbox.Core.csproj

@@ -151,6 +151,7 @@
     <Compile Include="Helpers\MediaGroupingHelpers.cs" />
     <Compile Include="Helpers\MessengerExtensions.cs" />
     <Compile Include="Helpers\SystemInformation.cs" />
+    <Compile Include="Helpers\VlcMediaExtensions.cs" />
     <Compile Include="Messages\ChangeAspectRatioMessage.cs" />
     <Compile Include="Messages\ChangeTimeRequestMessage.cs" />
     <Compile Include="Messages\ChangeVolumeRequestMessage.cs" />