WIP: OpenAL audio system.

TestGame/TestGame.cs

@@ -5,6 +5,7 @@ using Voile.Systems.Particles;
 using System.Numerics;
 using System.Diagnostics.CodeAnalysis;
 using Voile.Rendering;
+using Voile.OpenAL;
 
 public class TestGame : Game
 {
@@ -15,7 +16,10 @@ public class TestGame : Game
     {
         InitializeSystemsDefault();
 
+        _audioSystem = new OpenALSystem();
         _particleSystem = new ParticleSystem();
+
+        AddSystemToUpdate(_audioSystem);
         AddSystemToUpdate(_particleSystem);
     }
 
@@ -55,6 +59,7 @@ public class TestGame : Game
         {
             // ResourceManager.Reload();
             // _particleSystem!.RestartEmitter(_emitterId);
+            _audioSystem.PlaySound(_sound.Value, 1.0f);
         }
 
         if (Input.KeyboardKeyJustPressed(KeyboardKey.One))
@@ -104,6 +109,7 @@ public class TestGame : Game
     }
 
     [NotNull] private ParticleSystem _particleSystem;
+    private OpenALSystem _audioSystem;
     private int _emitterId;
     private ResourceRef<ParticleEmitterSettingsResource> _fireEffect;
     private ResourceRef<Font> _font;

TestGame/TestGame.csproj

@@ -11,6 +11,7 @@
 
     <ItemGroup>
         <ProjectReference Include="../Voile/Voile.csproj" />
+        <ProjectReference Include="../Voile.OpenAL/Voile.OpenAL.csproj" />
     </ItemGroup>
 
     <ItemGroup>

Voile.OpenAL/OpenALSystem.cs

@@ -0,0 +1,59 @@
+using Voile.Audio;
+using Silk.NET.OpenAL;
+
+namespace Voile.OpenAL;
+
+public class OpenALSystem : AudioSystem
+{
+    public OpenALSystem()
+    {
+        _al = AL.GetApi();
+        _alc = ALContext.GetApi();
+
+        Init();
+    }
+
+    public override void PlaySound(Sound sound, float volume)
+    {
+        var buffer = CreateAlBuffer(sound.Buffer, sound.SampleRate, sound.Channel);
+        var source = CreateAlSource(buffer);
+        _al.SourcePlay(source);
+    }
+
+    public override void Update(double deltaTime)
+    {
+        throw new NotImplementedException();
+    }
+
+    private unsafe void Init()
+    {
+        _device = _alc.OpenDevice("");
+        _context = _alc.CreateContext(_device, null);
+        _alc.MakeContextCurrent(_context);
+    }
+
+    private uint CreateAlBuffer(ReadOnlyMemory<short> data, int sampleRate, SoundChannel channels)
+    {
+        var buffer = _al.GenBuffer();
+        var format = channels == SoundChannel.Mono ? BufferFormat.Mono16 : BufferFormat.Stereo16;
+
+        unsafe
+        {
+            _al.BufferData(buffer, format, data.Pin().Pointer, data.Length, sampleRate);
+        }
+
+        return buffer;
+    }
+
+    private uint CreateAlSource(uint buffer)
+    {
+        var source = _al.GenSource();
+        _al.SetSourceProperty(source, SourceInteger.Buffer, buffer);
+        return source;
+    }
+
+    private unsafe Device* _device;
+    private ALContext _alc;
+    private unsafe Context* _context;
+    private AL _al;
+}

Voile.OpenAL/Voile.OpenAL.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="../Voile/Voile.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Silk.NET.OpenAL" Version="2.21.0" />
+    </ItemGroup>
+</Project>

Voile.sln

@@ -13,6 +13,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Folder", "Solution
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TestGame", "TestGame\TestGame.csproj", "{DBA85D7B-0A91-405B-9078-5463F49AE47E}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Voile.OpenAL", "Voile.OpenAL\Voile.OpenAL.csproj", "{3ABB7D30-4B64-43AD-A14F-E532B12AFC60}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{DBA85D7B-0A91-405B-9078-5463F49AE47E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DBA85D7B-0A91-405B-9078-5463F49AE47E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{DBA85D7B-0A91-405B-9078-5463F49AE47E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3ABB7D30-4B64-43AD-A14F-E532B12AFC60}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3ABB7D30-4B64-43AD-A14F-E532B12AFC60}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3ABB7D30-4B64-43AD-A14F-E532B12AFC60}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3ABB7D30-4B64-43AD-A14F-E532B12AFC60}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Voile/Source/Audio/AudioSystem.cs

@@ -0,0 +1,7 @@
+namespace Voile.Audio;
+
+public abstract class AudioSystem : IUpdatableSystem
+{
+    public abstract void Update(double deltaTime);
+    public abstract void PlaySound(Sound sound, float volume);
+}

Voile/Source/Game.cs

@@ -116,13 +116,6 @@ namespace Voile
                 Input = new RaylibInputSystem();
             }
 
-            if (AudioSystem is null)
-            {
-                AudioSystem = new StandardAudioSystem();
-            }
-
-            AudioSystem.Start();
-
             Input.Start();
             InitializeRenderer();
         }
@@ -131,7 +124,6 @@ namespace Voile
         {
             Input?.Dispose();
             Renderer?.Dispose();
-            AudioSystem?.Dispose();
             ResourceManager.Dispose();
         }