Migrate to C#12

Util/Audio/Clip/AudioClipResolver.cs

@@ -54,7 +54,7 @@ internal static class AudioClipResolver
         }
 
         if (!clip) return store.GetOrAdd(key, () => null);
-        return store.GetOrAdd(key, () => UnityClipLoader.Load(clip!, store));
+        return store.GetOrAdd(key, () => UnityClipLoader.Load(clip, store));
     }
 
     /// <summary>Opens <paramref name="path"/> with FFmpeg; mono MP3 files are wrapped in <see cref="MP3MonoLayoutReader"/> (game layout).</summary>

Util/Audio/Clip/AudioClipStore.cs

@@ -198,7 +198,7 @@ internal sealed class AudioClipStore : IDisposable
         // same key meanwhile, its entry wins and this source is discarded.
         lock (_sources)
         {
-            if (_disposed || _sources.TryGetValue(key, out var raced))
+            if (_disposed || _sources.TryGetValue(key, out _))
             {
                 source?.DisposeInternal();
                 return _disposed ? null : _sources[key];

Util/Audio/Clip/DecodeStream.cs

@@ -196,6 +196,7 @@ internal sealed class DecodeStream : IDisposable
     }
 
     /// <summary>Greatest common divisor of two positive integers (Euclid).</summary>
+    // ReSharper disable once InconsistentNaming
     private static int GCD(int a, int b)
     {
         while (b != 0) (a, b) = (b, a % b);

Util/Audio/Clip/FFmpegPCMReader.cs

@@ -81,6 +81,7 @@ internal sealed unsafe class FFmpegPCMReader : IPCMReader
     public long Position { get; private set; }
 
     /// <summary>True when the stream is MP3 and is decoded with the game's MP3 timing (see class summary).</summary>
+    // ReSharper disable once InconsistentNaming
     public bool IsMP3 { get; }
 
     /// <summary>Number of demuxer seeks performed (for diagnostics).</summary>

Util/Audio/Clip/MP3HeaderFrame.cs

@@ -1,4 +1,3 @@
-using System;
 using System.IO;
 
 namespace ADOFAIRenderer.Util.Audio.Clip;
@@ -20,6 +19,7 @@ namespace ADOFAIRenderer.Util.Audio.Clip;
 /// - Samples per frame: Layer I 384, Layer II 1152, Layer III 1152 (MPEG-1) or 576 (MPEG-2/2.5).
 /// - ID3v2 tags before the first frame: "ID3", version (2 bytes), flags (bit 0x10 = 10-byte footer), size (4 bytes, 7 bits each).
 /// </summary>
+// ReSharper disable once InconsistentNaming
 internal static class MP3HeaderFrame
 {
     /// <summary>Bytes searched for the first frame sync after the ID3v2 tags.</summary>

Util/Audio/Clip/MP3MonoLayoutReader.cs

@@ -13,6 +13,7 @@ namespace ADOFAIRenderer.Util.Audio.Clip;
 /// Output: 1 channel at the inner reader's sample rate. Frame 2k is inner frame k, frame 2k + 1 is 0.
 /// <see cref="TotalFrames"/> = 2 * inner TotalFrames.
 /// </summary>
+// ReSharper disable once InconsistentNaming
 internal sealed class MP3MonoLayoutReader : IPCMReader
 {
     private readonly IPCMReader _inner;