Add support to compress repository with zstd.

Directory.Packages.props

@@ -45,6 +45,6 @@
     <PackageVersion Include="System.IO.Compression" Version="4.3.0"/>
     <PackageVersion Include="SharpCompress" Version="0.38.0"/>
     <PackageVersion Include="System.Text.Encoding.CodePages" Version="8.0.0"/>
-    <PackageVersion Include="ZstdSharp.Port" Version="0.8.1"/>
+    <PackageVersion Include="ZstdSharp.Port" Version="0.8.6"/>
   </ItemGroup>
 </Project>

RomRepoMgr.Core/Filesystem/Vfs.cs

@@ -12,6 +12,7 @@ using RomRepoMgr.Database;
 using RomRepoMgr.Database.Models;
 using SharpCompress.Compressors;
 using SharpCompress.Compressors.LZMA;
+using ZstdSharp;
 
 namespace RomRepoMgr.Core.Filesystem;
 
@@ -365,9 +366,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
     internal long Open(string sha384, long fileSize)
     {
-        var sha384Bytes = new byte[48];
+        byte[] sha384Bytes = new byte[48];
 
-        for(var i = 0; i < 48; i++)
+        for(int i = 0; i < 48; i++)
         {
             if(sha384[i * 2] >= 0x30 && sha384[i * 2] <= 0x39)
                 sha384Bytes[i] = (byte)((sha384[i * 2] - 0x30) * 0x10);
@@ -386,19 +387,47 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         string sha384B32 = Base32.ToBase32String(sha384Bytes);
 
-        string repoPath = Path.Combine(Settings.Settings.Current.RepositoryPath,
-                                       "files",
-                                       sha384B32[0].ToString(),
-                                       sha384B32[1].ToString(),
-                                       sha384B32[2].ToString(),
-                                       sha384B32[3].ToString(),
-                                       sha384B32[4].ToString(),
-                                       sha384B32 + ".lz");
 
-        if(!File.Exists(repoPath)) return -1;
+        string repoPath;
+
+        repoPath = Path.Combine(Settings.Settings.Current.RepositoryPath,
+                                "files",
+                                sha384B32[0].ToString(),
+                                sha384B32[1].ToString(),
+                                sha384B32[2].ToString(),
+                                sha384B32[3].ToString(),
+                                sha384B32[4].ToString(),
+                                sha384B32 + ".lz");
+
+        long handle;
+
+        if(!File.Exists(repoPath))
+        {
+            repoPath = Path.Combine(Settings.Settings.Current.RepositoryPath,
+                                    "files",
+                                    sha384B32[0].ToString(),
+                                    sha384B32[1].ToString(),
+                                    sha384B32[2].ToString(),
+                                    sha384B32[3].ToString(),
+                                    sha384B32[4].ToString(),
+                                    sha384B32 + ".zst");
+
+            if(!File.Exists(repoPath)) return -1;
+
+            _lastHandle++;
+            handle = _lastHandle;
+
+            _streamsCache[handle] =
+                Stream.Synchronized(new ForcedSeekStream<DecompressionStream>(fileSize,
+                                                                              new FileStream(repoPath,
+                                                                                  FileMode.Open,
+                                                                                  FileAccess.Read)));
+
+            return handle;
+        }
 
         _lastHandle++;
-        long handle = _lastHandle;
+        handle = _lastHandle;
 
         _streamsCache[handle] =
             Stream.Synchronized(new ForcedSeekStream<LZipStream>(fileSize,
@@ -457,9 +486,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         if(sha1 != null)
         {
-            var sha1Bytes = new byte[20];
+            byte[] sha1Bytes = new byte[20];
 
-            for(var i = 0; i < 20; i++)
+            for(int i = 0; i < 20; i++)
             {
                 if(sha1[i * 2] >= 0x30 && sha1[i * 2] <= 0x39)
                     sha1Bytes[i] = (byte)((sha1[i * 2] - 0x30) * 0x10);
@@ -490,9 +519,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         if(md5 != null)
         {
-            var md5Bytes = new byte[16];
+            byte[] md5Bytes = new byte[16];
 
-            for(var i = 0; i < 16; i++)
+            for(int i = 0; i < 16; i++)
             {
                 if(md5[i * 2] >= 0x30 && md5[i * 2] <= 0x39)
                     md5Bytes[i] = (byte)((md5[i * 2] - 0x30) * 0x10);
@@ -545,9 +574,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         if(sha256 != null)
         {
-            var sha256Bytes = new byte[32];
+            byte[] sha256Bytes = new byte[32];
 
-            for(var i = 0; i < 32; i++)
+            for(int i = 0; i < 32; i++)
             {
                 if(sha256[i * 2] >= 0x30 && sha256[i * 2] <= 0x39)
                     sha256Bytes[i] = (byte)((sha256[i * 2] - 0x30) * 0x10);
@@ -579,9 +608,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         if(sha1 != null)
         {
-            var sha1Bytes = new byte[20];
+            byte[] sha1Bytes = new byte[20];
 
-            for(var i = 0; i < 20; i++)
+            for(int i = 0; i < 20; i++)
             {
                 if(sha1[i * 2] >= 0x30 && sha1[i * 2] <= 0x39)
                     sha1Bytes[i] = (byte)((sha1[i * 2] - 0x30) * 0x10);
@@ -612,9 +641,9 @@ public class Vfs(ILoggerFactory loggerFactory) : IDisposable
 
         if(md5 != null)
         {
-            var md5Bytes = new byte[16];
+            byte[] md5Bytes = new byte[16];
 
-            for(var i = 0; i < 16; i++)
+            for(int i = 0; i < 16; i++)
             {
                 if(md5[i * 2] >= 0x30 && md5[i * 2] <= 0x39)
                     md5Bytes[i] = (byte)((md5[i * 2] - 0x30) * 0x10);

RomRepoMgr.Core/RomRepoMgr.Core.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <ItemGroup>
-    <PackageReference Include="Aaru.Checksums.Native" />
+    <PackageReference Include="Aaru.Checksums.Native"/>
     <PackageReference Include="DotNetZip"/>
     <PackageReference Include="EFCore.BulkExtensions"/>
     <PackageReference Include="Mono.Fuse.NETStandard"/>
@@ -19,6 +19,7 @@
     <PackageReference Include="Roslynator.Formatting.Analyzers"/>
     <PackageReference Include="SmartAnalyzers.MultithreadingAnalyzer"/>
     <PackageReference Include="Text.Analyzers"/>
+    <PackageReference Include="ZstdSharp.Port"/>
   </ItemGroup>
 
   <ItemGroup>

RomRepoMgr.Core/Workers/Compression.cs

@@ -28,8 +28,11 @@ using System.Diagnostics;
 using System.IO;
 using RomRepoMgr.Core.EventArgs;
 using RomRepoMgr.Core.Resources;
+using RomRepoMgr.Settings;
 using SharpCompress.Compressors;
 using SharpCompress.Compressors.LZMA;
+using ZstdSharp;
+using ZstdSharp.Unsafe;
 using ErrorEventArgs = RomRepoMgr.Core.EventArgs.ErrorEventArgs;
 
 namespace RomRepoMgr.Core.Workers;
@@ -45,11 +48,21 @@ public sealed class Compression
 
     public void CompressFile(string source, string destination)
     {
-        var    inFs    = new FileStream(source,      FileMode.Open,      FileAccess.Read);
+        var inFs  = new FileStream(source,      FileMode.Open,      FileAccess.Read);
-        var    outFs   = new FileStream(destination, FileMode.CreateNew, FileAccess.Write);
+        var outFs = new FileStream(destination, FileMode.CreateNew, FileAccess.Write);
-        Stream zStream = new LZipStream(outFs, CompressionMode.Compress);
 
-        var buffer = new byte[BUFFER_SIZE];
+        Stream zStream;
+
+        if(Settings.Settings.Current.Compression == CompressionType.Zstd)
+        {
+            var zstdStream = new CompressionStream(outFs, 15);
+            zstdStream.SetParameter(ZSTD_cParameter.ZSTD_c_nbWorkers, Environment.ProcessorCount);
+            zStream = zstdStream;
+        }
+        else
+            zStream = new LZipStream(outFs, CompressionMode.Compress);
+
+        byte[] buffer = new byte[BUFFER_SIZE];
 
         SetProgressBounds?.Invoke(this,
                                   new ProgressBoundsEventArgs
@@ -89,9 +102,17 @@ public sealed class Compression
 
     public void DecompressFile(string source, string destination)
     {
-        var    inFs    = new FileStream(source,      FileMode.Open,   FileAccess.Read);
+        var    inFs  = new FileStream(source,      FileMode.Open,   FileAccess.Read);
-        var    outFs   = new FileStream(destination, FileMode.Create, FileAccess.Write);
+        var    outFs = new FileStream(destination, FileMode.Create, FileAccess.Write);
-        Stream zStream = new LZipStream(inFs, CompressionMode.Decompress);
+        Stream zStream;
+
+        if(Path.GetExtension(source) == ".zst")
+            zStream = new DecompressionStream(inFs);
+        else if(Path.GetExtension(source) == ".lz")
+            zStream = new LZipStream(inFs, CompressionMode.Decompress);
+        else
+            throw new ArgumentException($"Invalid compression extension {Path.GetExtension(source)}");
+
 
         zStream.CopyTo(outFs);
 

RomRepoMgr.Core/Workers/FileExporter.cs

@@ -12,6 +12,7 @@ using RomRepoMgr.Core.Resources;
 using RomRepoMgr.Database;
 using RomRepoMgr.Database.Models;
 using SharpCompress.Compressors.LZMA;
+using ZstdSharp;
 using CompressionMode = SharpCompress.Compressors.CompressionMode;
 
 namespace RomRepoMgr.Core.Workers;
@@ -155,10 +156,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
 
                 if(media.Sha256 != null)
                 {
-                    var    sha256Bytes = new byte[32];
+                    byte[] sha256Bytes = new byte[32];
                     string sha256      = media.Sha256;
 
-                    for(var i = 0; i < 32; i++)
+                    for(int i = 0; i < 32; i++)
                     {
                         if(sha256[i * 2] >= 0x30 && sha256[i * 2] <= 0x39)
                             sha256Bytes[i] = (byte)((sha256[i * 2] - 0x30) * 0x10);
@@ -190,10 +191,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
 
                 if(media.Sha1 != null)
                 {
-                    var    sha1Bytes = new byte[20];
+                    byte[] sha1Bytes = new byte[20];
                     string sha1      = media.Sha1;
 
-                    for(var i = 0; i < 20; i++)
+                    for(int i = 0; i < 20; i++)
                     {
                         if(sha1[i * 2] >= 0x30 && sha1[i * 2] <= 0x39)
                             sha1Bytes[i] = (byte)((sha1[i * 2] - 0x30) * 0x10);
@@ -225,10 +226,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
 
                 if(media.Md5 != null)
                 {
-                    var    md5Bytes = new byte[16];
+                    byte[] md5Bytes = new byte[16];
                     string md5      = media.Md5;
 
-                    for(var i = 0; i < 16; i++)
+                    for(int i = 0; i < 16; i++)
                     {
                         if(md5[i * 2] >= 0x30 && md5[i * 2] <= 0x39)
                             md5Bytes[i] = (byte)((md5[i * 2] - 0x30) * 0x10);
@@ -286,7 +287,7 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
                                                Maximum = inFs.Length
                                            });
 
-                var buffer = new byte[BUFFER_SIZE];
+                byte[] buffer = new byte[BUFFER_SIZE];
 
                 while(inFs.Position + BUFFER_SIZE <= inFs.Length)
                 {
@@ -359,10 +360,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
 
                 if(disk.Sha1 != null)
                 {
-                    var    sha1Bytes = new byte[20];
+                    byte[] sha1Bytes = new byte[20];
                     string sha1      = disk.Sha1;
 
-                    for(var i = 0; i < 20; i++)
+                    for(int i = 0; i < 20; i++)
                     {
                         if(sha1[i * 2] >= 0x30 && sha1[i * 2] <= 0x39)
                             sha1Bytes[i] = (byte)((sha1[i * 2] - 0x30) * 0x10);
@@ -394,10 +395,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
 
                 if(disk.Md5 != null)
                 {
-                    var    md5Bytes = new byte[16];
+                    byte[] md5Bytes = new byte[16];
                     string md5      = disk.Md5;
 
-                    for(var i = 0; i < 16; i++)
+                    for(int i = 0; i < 16; i++)
                     {
                         if(md5[i * 2] >= 0x30 && md5[i * 2] <= 0x39)
                             md5Bytes[i] = (byte)((md5[i * 2] - 0x30) * 0x10);
@@ -453,7 +454,7 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
                                                Maximum = inFs.Length
                                            });
 
-                var buffer = new byte[BUFFER_SIZE];
+                byte[] buffer = new byte[BUFFER_SIZE];
 
                 while(inFs.Position + BUFFER_SIZE <= inFs.Length)
                 {
@@ -558,10 +559,10 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
         // Special case for empty file, as it seems to crash when SharpCompress tries to unLZMA it.
         if(file.Size == 0) return new MemoryStream();
 
-        var    sha384Bytes = new byte[48];
+        byte[] sha384Bytes = new byte[48];
         string sha384      = file.Sha384;
 
-        for(var i = 0; i < 48; i++)
+        for(int i = 0; i < 48; i++)
         {
             if(sha384[i * 2] >= 0x30 && sha384[i * 2] <= 0x39)
                 sha384Bytes[i] = (byte)((sha384[i * 2] - 0x30) * 0x10);
@@ -589,10 +590,29 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
                                        sha384B32[4].ToString(),
                                        sha384B32 + ".lz");
 
-        if(!File.Exists(repoPath))
+        FileStream inFs;
-            throw new ArgumentException(string.Format(Localization.CannotFindHashInRepository, file.Sha256));
 
-        var inFs = new FileStream(repoPath, FileMode.Open, FileAccess.Read);
+        // Try ZSTD
+        if(!File.Exists(repoPath))
+        {
+            repoPath = Path.Combine(Settings.Settings.Current.RepositoryPath,
+                                    "files",
+                                    sha384B32[0].ToString(),
+                                    sha384B32[1].ToString(),
+                                    sha384B32[2].ToString(),
+                                    sha384B32[3].ToString(),
+                                    sha384B32[4].ToString(),
+                                    sha384B32 + ".zst");
+
+            if(!File.Exists(repoPath))
+                throw new ArgumentException(string.Format(Localization.CannotFindHashInRepository, file.Sha256));
+
+            inFs = new FileStream(repoPath, FileMode.Open, FileAccess.Read);
+
+            return new StreamWithLength(new DecompressionStream(inFs), (long)file.Size);
+        }
+
+        inFs = new FileStream(repoPath, FileMode.Open, FileAccess.Read);
 
         return new StreamWithLength(new LZipStream(inFs, CompressionMode.Decompress), (long)file.Size);
     }
@@ -612,11 +632,9 @@ public class FileExporter(long romSetId, string outPath, ILoggerFactory loggerFa
                                      Value = _filePosition
                                  });
 
-            if(!_filesByMachine.TryGetValue(e.CurrentEntry.FileName, out FileByMachine fileByMachine))
+            if(!_filesByMachine.TryGetValue(e.CurrentEntry.FileName, out FileByMachine fileByMachine) &&
-            {
+               !_filesByMachine.TryGetValue(e.CurrentEntry.FileName.Replace('/', '\\'), out fileByMachine))
-                if(!_filesByMachine.TryGetValue(e.CurrentEntry.FileName.Replace('/', '\\'), out fileByMachine))
+                throw new ArgumentException(Localization.CannotFindZipEntryInDictionary);
-                    throw new ArgumentException(Localization.CannotFindZipEntryInDictionary);
-            }
 
             DbFile currentFile = fileByMachine.File;
 

RomRepoMgr.Core/Workers/FileImporter.cs

@@ -15,9 +15,12 @@ using RomRepoMgr.Core.Models;
 using RomRepoMgr.Core.Resources;
 using RomRepoMgr.Database;
 using RomRepoMgr.Database.Models;
+using RomRepoMgr.Settings;
 using SabreTools.FileTypes.Aaru;
 using SabreTools.FileTypes.CHD;
 using SharpCompress.Compressors.LZMA;
+using ZstdSharp;
+using ZstdSharp.Unsafe;
 using CompressionMode = SharpCompress.Compressors.CompressionMode;
 
 namespace RomRepoMgr.Core.Workers;
@@ -551,7 +554,9 @@ public sealed class FileImporter
 
             if(!Directory.Exists(repoPath)) Directory.CreateDirectory(repoPath);
 
-            repoPath = Path.Combine(repoPath, sha384B32 + ".lz");
+            repoPath = Settings.Settings.Current.Compression == CompressionType.Zstd
+                           ? Path.Combine(repoPath, sha384B32 + ".zst")
+                           : Path.Combine(repoPath, sha384B32 + ".lz");
 
             if(dbFile.Crc32 == null)
             {
@@ -605,8 +610,18 @@ public sealed class FileImporter
 
             inFs.Position = 0;
 
-            var    outFs   = new FileStream(repoPath, FileMode.CreateNew, FileAccess.Write);
+            var outFs = new FileStream(repoPath, FileMode.CreateNew, FileAccess.Write);
-            Stream zStream = new LZipStream(outFs, CompressionMode.Compress);
+
+            Stream zStream;
+
+            if(Settings.Settings.Current.Compression == CompressionType.Zstd)
+            {
+                var zstdStream = new CompressionStream(outFs, 15);
+                zstdStream.SetParameter(ZSTD_cParameter.ZSTD_c_nbWorkers, Environment.ProcessorCount);
+                zStream = zstdStream;
+            }
+            else
+                zStream = new LZipStream(outFs, CompressionMode.Compress);
 
             SetProgressBounds2?.Invoke(this,
                                        new ProgressBoundsEventArgs

RomRepoMgr.Settings/Settings.cs

@@ -33,12 +33,19 @@ using PlatformID = Aaru.CommonTypes.Interop.PlatformID;
 
 namespace RomRepoMgr.Settings;
 
+public enum CompressionType
+{
+    Lzip = 0,
+    Zstd
+}
+
 public sealed class SetSettings
 {
-    public string DatabasePath    { get; set; }
+    public string          DatabasePath    { get; set; }
-    public string RepositoryPath  { get; set; }
+    public string          RepositoryPath  { get; set; }
-    public string TemporaryFolder { get; set; }
+    public string          TemporaryFolder { get; set; }
-    public string UnArchiverPath  { get; set; }
+    public string          UnArchiverPath  { get; set; }
+    public CompressionType Compression     { get; set; }
 }
 
 /// <summary>Manages statistics</summary>
@@ -105,6 +112,11 @@ public static class Settings
                                                      ? ((NSString)obj).ToString()
                                                      : null;
 
+                        Current.Compression = parsedPreferences.TryGetValue("Compression", out obj)
+                                                  ? (CompressionType)Enum.Parse(typeof(CompressionType),
+                                                                                    ((NSNumber)obj).ToString())
+                                                  : CompressionType.Lzip;
+
                         prefsFs.Close();
                     }
                     else
@@ -150,6 +162,11 @@ public static class Settings
                     Current.RepositoryPath  = key.GetValue("RepositoryPath") as string;
                     Current.TemporaryFolder = key.GetValue("TemporaryFolder") as string;
                     Current.UnArchiverPath  = key.GetValue("UnArchiverPath") as string;
+
+                    if(key.GetValue("Compression") is int compression)
+                        Current.Compression = (CompressionType)compression;
+                    else
+                        Current.Compression = CompressionType.Lzip;
                 }
 
                     break;
@@ -222,6 +239,9 @@ public static class Settings
                         },
                         {
                             "UnArchiverPath", Current.UnArchiverPath
+                        },
+                        {
+                            "Compression", (NSNumber)(int)Current.Compression
                         }
                     };
 
@@ -256,6 +276,7 @@ public static class Settings
                     key?.SetValue("RepositoryPath",  Current.RepositoryPath);
                     key?.SetValue("TemporaryFolder", Current.TemporaryFolder);
                     key?.SetValue("UnArchiverPath",  Current.UnArchiverPath);
+                    key?.SetValue("Compression",     (int)Current.Compression);
                 }
 
                     break;
@@ -309,7 +330,8 @@ public static class Settings
         {
             DatabasePath    = Path.Combine(dataPath, "romrepo.db"),
             RepositoryPath  = Path.Combine(dataPath, "repo"),
-            TemporaryFolder = Path.GetTempPath()
+            TemporaryFolder = Path.GetTempPath(),
+            Compression     = CompressionType.Lzip
         };
     }
 }

RomRepoMgr/Resources/Localization.Designer.cs

@@ -770,5 +770,11 @@ namespace RomRepoMgr.Resources {
                 return ResourceManager.GetString("ProgressLabel", resourceCulture);
             }
         }
+        
+        public static string CompressionType {
+            get {
+                return ResourceManager.GetString("CompressionType", resourceCulture);
+            }
+        }
     }
 }

RomRepoMgr/Resources/Localization.es.resx

@@ -381,4 +381,7 @@ Tardará mucho tiempo...</value>
     <data name="ProgressLabel" xml:space="preserve">
         <value>Progreso</value>
     </data>
+    <data name="CompressionType" xml:space="preserve">
+        <value>Compresión</value>
+    </data>
 </root>

RomRepoMgr/Resources/Localization.resx

@@ -389,4 +389,7 @@ This will take a long time...</value>
     <data name="ProgressLabel" xml:space="preserve">
         <value>Progress</value>
     </data>
+    <data name="CompressionType" xml:space="preserve">
+        <value>Compression</value>
+    </data>
 </root>

RomRepoMgr/ViewModels/SettingsViewModel.cs

@@ -26,6 +26,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using System.Windows.Input;
 using Avalonia.Platform.Storage;
@@ -39,6 +40,7 @@ using RomRepoMgr.Core.EventArgs;
 using RomRepoMgr.Core.Workers;
 using RomRepoMgr.Database;
 using RomRepoMgr.Resources;
+using RomRepoMgr.Settings;
 using RomRepoMgr.Views;
 using Serilog;
 using Serilog.Extensions.Logging;
@@ -49,13 +51,16 @@ namespace RomRepoMgr.ViewModels;
 public sealed partial class SettingsViewModel : ViewModelBase
 {
     readonly SettingsDialog _view;
-    bool                    _databaseChanged;
+
-    string                  _databasePath;
+    CompressionType _compression;
-    bool                    _repositoryChanged;
+    bool            _compressionChanged;
-    string                  _repositoryPath;
+    bool            _databaseChanged;
-    bool                    _temporaryChanged;
+    string          _databasePath;
-    string                  _temporaryPath;
+    bool            _repositoryChanged;
-    bool                    _unArChanged;
+    string          _repositoryPath;
+    bool            _temporaryChanged;
+    string          _temporaryPath;
+    bool            _unArChanged;
     [ObservableProperty]
     string _unArPath;
     [ObservableProperty]
@@ -83,10 +88,14 @@ public sealed partial class SettingsViewModel : ViewModelBase
         RepositoryPath = Settings.Settings.Current.RepositoryPath;
         TemporaryPath  = Settings.Settings.Current.TemporaryFolder;
         UnArPath       = Settings.Settings.Current.UnArchiverPath;
+        Compression    = Settings.Settings.Current.Compression;
 
         if(!string.IsNullOrWhiteSpace(UnArPath)) CheckUnAr();
     }
 
+    public List<CompressionType> CompressionTypes { get; } =
+        Enum.GetValues(typeof(CompressionType)).Cast<CompressionType>().ToList();
+
     public ICommand UnArCommand       { get; }
     public ICommand TemporaryCommand  { get; }
     public ICommand RepositoryCommand { get; }
@@ -126,6 +135,16 @@ public sealed partial class SettingsViewModel : ViewModelBase
         }
     }
 
+    public CompressionType Compression
+    {
+        get => _compression;
+        set
+        {
+            SetProperty(ref _compression, value);
+            _compressionChanged = true;
+        }
+    }
+
     void CheckUnAr()
     {
         var worker = new Compression();
@@ -331,7 +350,9 @@ public sealed partial class SettingsViewModel : ViewModelBase
             Settings.Settings.UnArUsable             = true;
         }
 
-        if(_databaseChanged || _repositoryChanged || _temporaryChanged || _unArChanged)
+        if(_compressionChanged) Settings.Settings.Current.Compression = Compression;
+
+        if(_databaseChanged || _repositoryChanged || _temporaryChanged || _unArChanged || _compressionChanged)
             Settings.Settings.SaveSettings();
 
         _view.Close();

RomRepoMgr/Views/SettingsDialog.axaml

@@ -41,7 +41,7 @@
         <vm:SettingsViewModel />
     </Design.DataContext>
     <Border Padding="15">
-        <Grid RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto">
+        <Grid RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto">
             <Grid Grid.Row="0"
                   ColumnDefinitions="*,250,Auto">
                 <TextBlock Grid.Column="0"
@@ -135,7 +135,21 @@
                        VerticalAlignment="Center"
                        Text="{Binding UnArVersion, Mode=OneWay}"
                        FontWeight="Bold" />
-            <StackPanel Grid.Row="5"
+            <Grid Grid.Row="5"
+                  ColumnDefinitions="Auto, *">
+                <TextBlock Grid.Column="0"
+                           VerticalAlignment="Center"
+                           Text="{x:Static resources:Localization.CompressionType}"
+                           FontWeight="Bold"
+                           Padding="5" />
+                <ComboBox Grid.Column="1"
+                          HorizontalAlignment="Stretch"
+                          VerticalAlignment="Center"
+                          SelectedItem="{Binding Compression, Mode=TwoWay}"
+                          ItemsSource="{Binding CompressionTypes, Mode=OneWay}"
+                          Padding="5" />
+            </Grid>
+            <StackPanel Grid.Row="6"
                         Orientation="Horizontal"
                         HorizontalAlignment="Right">
                 <Button HorizontalAlignment="Right"