Updated audio image extraction logic. Added caching classes.

Harmonia.Core/Caching/AudioImageMemoryCache.cs

@@ -0,0 +1,36 @@
+using Harmonia.Core.Imaging;
+using Harmonia.Core.Models;
+
+namespace Harmonia.Core.Caching;
+
+public class AudioImageMemoryCache(IAudioImageExtractor audioImageExtractor) : MemoryCache<Song, SongPictureInfo>, IAudioImageCache
+{
+    protected override object? GetKey(Song key)
+    {
+        if (string.IsNullOrWhiteSpace(key.ImageHash) == false)
+        {
+            return key.ImageHash;
+        }
+        else if (string.IsNullOrWhiteSpace(key.ImageName) == false)
+        {
+            return key.ImageName;
+        }
+
+        return null;
+    }
+
+    protected override SongPictureInfo? Fetch(Song key)
+    {
+        return audioImageExtractor.ExtractImage(key.FileName);
+    }
+
+    protected override void AddToCache(object key, SongPictureInfo entry)
+    {
+        base.AddToCache(key, entry);
+    }
+
+    protected override long GetEntrySize(SongPictureInfo entry)
+    {
+        return entry.Size;
+    }
+}

Harmonia.Core/Caching/Cache.cs

@@ -0,0 +1,40 @@
+namespace Harmonia.Core.Caching;
+
+public abstract class Cache<TKey, TValue> : ICache<TKey, TValue> where TKey : notnull
+{
+    protected abstract TValue? TryGetValue(object key);
+    protected abstract TValue? Fetch(TKey key);
+    protected abstract void AddToCache(object key, TValue value);
+
+    public TValue? Get(TKey key)
+    {
+        object? actualKey = GetKey(key);
+
+        if (actualKey == null)
+            return default;
+
+        return TryGetValue(actualKey) ?? Refresh(key);
+    }
+
+    public TValue? Refresh(TKey key)
+    {
+        object? actualKey = GetKey(key);
+
+        if (actualKey == null)
+            return default;
+
+        TValue? value = Fetch(key);
+
+        if (value == null)
+            return default;
+
+        AddToCache(actualKey, value);
+
+        return value;
+    }
+
+    protected virtual object? GetKey(TKey key)
+    {
+        return key;
+    }
+}

Harmonia.Core/Caching/IAudioImageCache.cs

@@ -0,0 +1,9 @@
+using Harmonia.Core.Imaging;
+using Harmonia.Core.Models;
+
+namespace Harmonia.Core.Caching;
+
+public interface IAudioImageCache : ICache<Song, SongPictureInfo>
+{
+
+}

Harmonia.Core/Caching/ICache.cs

@@ -0,0 +1,7 @@
+namespace Harmonia.Core.Caching;
+
+public interface ICache<TKey, TValue>
+{
+    TValue? Get(TKey key);
+    TValue? Refresh(TKey key);
+}

Harmonia.Core/Caching/MemoryCache.cs

@@ -0,0 +1,43 @@
+using Microsoft.Extensions.Caching.Memory;
+
+namespace Harmonia.Core.Caching;
+
+public abstract class MemoryCache<TKey, TValue> : Cache<TKey, TValue> where TKey : notnull
+{
+    private readonly IMemoryCache _memoryCache;
+
+    protected virtual long? SizeLimit => 2000000000;
+    protected virtual double CompactionPercentage => 0.2;
+    protected virtual TimeSpan SlidingExpiration => TimeSpan.FromSeconds(600);
+
+    public MemoryCache()
+    {
+        MemoryCacheOptions memoryCacheOptions = new()
+        {
+            SizeLimit = SizeLimit,
+            CompactionPercentage = CompactionPercentage
+        };
+
+        _memoryCache = new MemoryCache(memoryCacheOptions);
+    }
+
+    protected override TValue? TryGetValue(object key)
+    {
+        _memoryCache.TryGetValue(key, out TValue? value);
+
+        return value;
+    }
+
+    protected override void AddToCache(object key, TValue entry)
+    {
+        long entrySize = GetEntrySize(entry);
+
+        var cacheEntryOptions = new MemoryCacheEntryOptions()
+            .SetSize(entrySize)
+            .SetSlidingExpiration(SlidingExpiration);
+
+        _memoryCache.Set(key, entry, cacheEntryOptions);
+    }
+
+    protected abstract long GetEntrySize(TValue entry);
+}

Harmonia.Core/Extensions/ServiceCollectionExtensions.cs

@@ -0,0 +1,25 @@
+using Harmonia.Core.Engine;
+using Harmonia.Core.Imaging;
+using Harmonia.Core.Player;
+using Harmonia.Core.Playlists;
+using Harmonia.Core.Scanner;
+using Harmonia.Core.Tags;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Harmonia.Core.Extensions;
+
+public static class ServiceCollectionExtensions
+{
+    public static IServiceCollection AddHarmonia(this IServiceCollection services)
+    {
+        services.AddSingleton<IAudioEngine, BassAudioEngine>();
+        services.AddSingleton<IAudioPlayer, AudioPlayer>();
+        services.AddSingleton<ITagResolver, TagLibTagResolver>();
+        services.AddSingleton<IAudioImageExtractor, AudioImageExtractor>();
+        services.AddSingleton<IAudioFileScanner, AudioFileScanner>();
+        services.AddSingleton<IPlaylistRepository, PlaylistRepository>();
+        services.AddSingleton<IPlaylistManager, PlaylistManager>();
+
+        return services;
+    }
+}

Harmonia.Core/Harmonia.Core.csproj

@@ -9,6 +9,9 @@
   <ItemGroup>
     <PackageReference Include="ManagedBass" Version="3.1.1" />
     <PackageReference Include="ManagedBass.Flac" Version="3.1.1" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="9.0.2" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="9.0.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.2" />
     <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
     <PackageReference Include="TagLibSharp" Version="2.3.0" />
   </ItemGroup>

Harmonia.Core/Imaging/AudioImageExtractor.cs

@@ -2,16 +2,58 @@
 
 namespace Harmonia.Core.Imaging;
 
-public class AudioImageExtractor(ITagResolver tagResolver) : IAudioImageExtractor
+public class AudioImageExtractor : IAudioImageExtractor
 {
-    public SongPictureInfo ExtractImage(string fileName)
-    {
-        SongTagInfo songTagInfo = tagResolver.GetSongTagInfo(fileName);
+    private readonly ITagResolver _tagResolver;
+    private readonly string[] _searchPatterns;
+    private readonly string[] _imageExtensions;
 
-        return ExtractImage(fileName, songTagInfo);
+    public AudioImageExtractor(ITagResolver tagResolver)
+    {
+        _tagResolver = tagResolver;
+        _searchPatterns = GetSearchPatterns();
+        _imageExtensions = GetImageExtensions();
     }
 
-    public SongPictureInfo ExtractImage(string fileName, SongTagInfo songTagInfo)
+    protected virtual string[] GetSearchPatterns()
+    {
+        return
+        [
+            @"*%filename%*",
+            @"*folder*",
+            @"*front*",
+            @"*cover*",
+            @"Cover\*folder*",
+            @"Cover\*front*",
+            @"Cover\*cover*",
+            @"Cover\*",
+            @"Scans\*folder*",
+            @"Scans\*front*",
+            @"Scans\*cover*",
+            @"Scans\*",
+            @"*"
+        ];
+    }
+    
+
+    protected virtual string[] GetImageExtensions()
+    {
+        return
+        [
+            "jpg",
+            "jpeg",
+            "png"
+        ];
+    }
+
+    public SongPictureInfo? ExtractImage(string path)
+    {
+        SongTagInfo songTagInfo = _tagResolver.GetSongTagInfo(path);
+
+        return ExtractImage(path, songTagInfo);
+    }
+
+    public SongPictureInfo? ExtractImage(string path, SongTagInfo songTagInfo)
     {
         if (songTagInfo.FrontCover != null)
         {
@@ -21,7 +63,47 @@ public class AudioImageExtractor(ITagResolver tagResolver) : IAudioImageExtracto
         }
         else
         {
-            return SongPictureInfo.FromFile(fileName);
+            string? imagePath = GetImagePath(path);
+
+            if (string.IsNullOrWhiteSpace(imagePath))
+                return null;
+
+            return SongPictureInfo.FromFile(path);
+        }
+    }
+
+    private string? GetImagePath(string path)
+    {
+        string[] fileNames;
+        string extension;
+
+        foreach (string searchPattern in _searchPatterns)
+        {
+            fileNames = GetFilesFromDirectory(path, searchPattern);
+
+            foreach (string fileName in fileNames)
+            {
+                extension = Path.GetExtension(fileName)?.Replace(".", "") ?? string.Empty;
+
+                if (_imageExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase) == false)
+                    continue;
+
+                return fileName;
+            }
+        }
+
+        return null;
+    }
+
+    private static string[] GetFilesFromDirectory(string path, string searchPattern)
+    {
+        try
+        {
+            return Directory.GetFiles(path, searchPattern);
+        }
+        catch (DirectoryNotFoundException)
+        {
+            return [];
         }
     }
 }

Harmonia.Core/Imaging/IAudioImageExtractor.cs

@@ -4,6 +4,6 @@ namespace Harmonia.Core.Imaging;
 
 public interface IAudioImageExtractor
 {
-    SongPictureInfo ExtractImage(string fileName);
-    SongPictureInfo ExtractImage(string fileName, SongTagInfo songTagInfo);
+    SongPictureInfo? ExtractImage(string path);
+    SongPictureInfo? ExtractImage(string path, SongTagInfo songTagInfo);
 }

Harmonia.Core/Imaging/SongPictureInfo.cs

@@ -7,7 +7,7 @@ public class SongPictureInfo : IDisposable
     public required Stream Stream { get; init; }
     public string? ImageHash { get; init; }
     public required string ImageName { get; init; }
-    public ulong Size { get; init; }
+    public long Size { get; init; }
 
     private SongPictureInfo()
     {
@@ -45,7 +45,7 @@ public class SongPictureInfo : IDisposable
             Stream = stream,
             ImageHash = imageHash,
             ImageName = imageName,
-            Size = (ulong)stream.Length
+            Size = stream.Length
         };
 
         return songPictureInfo;

Harmonia.Core/Scanner/AudioFileScanner.cs

@@ -30,7 +30,7 @@ public class AudioFileScanner(ITagResolver tagResolver, IAudioImageExtractor aud
     {
         FileInfo fileInfo = new(fileName);
         SongTagInfo songTagInfo = tagResolver.GetSongTagInfo(fileName);
-        using SongPictureInfo songPictureInfo = audioImageExtractor.ExtractImage(fileName, songTagInfo);
+        using SongPictureInfo? songPictureInfo = audioImageExtractor.ExtractImage(fileName, songTagInfo);
 
         Song song = new()
         {
@@ -48,8 +48,8 @@ public class AudioFileScanner(ITagResolver tagResolver, IAudioImageExtractor aud
             Genre = songTagInfo.Genre,
             BitRate = songTagInfo.BitRate,
             SampleRate = songTagInfo.SampleRate,
-            ImageName = songPictureInfo.ImageName,
-            ImageHash = songPictureInfo.ImageHash
+            ImageName = songPictureInfo?.ImageName,
+            ImageHash = songPictureInfo?.ImageHash
         };
 
         return song;