Initial commit

TechMedia.Backend.Vlc/TechMedia.Backend.Vlc.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\TechMedia.Core\TechMedia.Core.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="LibVLCSharp" Version="3.6.5" />
+      <PackageReference Include="VideoLAN.LibVLC.Windows" Version="3.0.16" />
+    </ItemGroup>
+
+</Project>

TechMedia.Backend.Vlc/VlcAudioBackend.cs

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+using LibVLCSharp.Shared;
+using TechMedia.Core.Backend;
+using TechMedia.Core.Model;
+
+namespace TechMedia.Backend.Vlc;
+
+public class VlcAudioBackend : IAudioBackend
+{
+    private readonly LibVLC _libVlc;
+    private readonly MediaPlayer _player;
+    private readonly Dictionary<IProgress<float>, EventHandler<MediaPlayerPositionChangedEventArgs>> _progressReporters = new();
+
+    public VlcAudioBackend()
+    {
+        LibVLCSharp.Shared.Core.Initialize();
+        _libVlc = new LibVLC();
+        _player = new MediaPlayer(_libVlc);
+    }
+
+    public void JustPlay()
+    {
+        _player.Play();
+    }
+
+    public void PlayFile(string filename)
+    {
+        //_player.Stop();
+        var media = new Media(_libVlc, filename);
+        _player.Media = media;
+        
+        media.Dispose();
+        
+        _player.Play();
+        //_player.Position = 0.97f;
+    }
+
+    public async Task<Track?> GetFileMetadata(string filename)
+    {
+        using var media = new Media(_libVlc, filename);
+        await Task.Run(async () => await media.Parse());
+        if (media.Duration <= 0)
+        {
+            return null;
+        }
+
+        return new Track
+        {
+            Title = media.Meta(MetadataType.Title),
+            Album = media.Meta(MetadataType.Album),
+            AlbumArt = media.Meta(MetadataType.ArtworkURL),
+            Duration = media.Duration,
+            Filename = filename
+        };
+    }
+
+    public void StopPlayback()
+    {
+        _player.Stop();
+    }
+
+    public void RegisterProgressWatcher(IProgress<float> reporter)
+    {
+        void Handler(object? _, MediaPlayerPositionChangedEventArgs args)
+        {
+            reporter.Report(args.Position);
+        }
+
+        _player.PositionChanged += Handler;
+        _progressReporters.Add(reporter, Handler);
+    }
+
+    public void RemoveProgressWatcher(IProgress<float> reporter)
+    {
+        if (_progressReporters.ContainsKey(reporter))
+        {
+            _player.PositionChanged -= _progressReporters[reporter];
+            _progressReporters.Remove(reporter);
+        }
+    }
+
+    public void RegisterTrackEndHandler(EventHandler<EventArgs> onEndReached)
+    {
+        _player.EndReached += onEndReached;
+    }
+}