From 6cdade1534cf76d1b6a0d3c6251ea0ea39b1c585 Mon Sep 17 00:00:00 2001
From: SuuperW <SuuperW@gmail.com>
Date: Fri, 18 Oct 2019 10:39:04 -0500
Subject: [PATCH] MelonDS: ISoundProvider

---
 .../BizHawk.Emulation.Cores.csproj            |  1 +
 .../Nintendo/NDS/MelonDS_SoundProvider.cs     | 51 +++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 BizHawk.Emulation.Cores/Consoles/Nintendo/NDS/MelonDS_SoundProvider.cs

diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 65ed94013a..ba9b60e17b 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -988,6 +988,7 @@
     <Compile Include="Consoles\Nintendo\N64\NativeApi\mupen64plusVideoApi.cs" />
     <Compile Include="Consoles\Nintendo\NDS\MelonDS.cs" />
     <Compile Include="Consoles\Nintendo\NDS\MelonDS_InputPollable.cs" />
+    <Compile Include="Consoles\Nintendo\NDS\MelonDS_SoundProvider.cs" />
     <Compile Include="Consoles\Nintendo\NDS\MelonDS_Statable.cs" />
     <Compile Include="Consoles\Nintendo\NDS\MelonDS_VideoProvider.cs" />
     <Compile Include="Consoles\Nintendo\NES\APU.cs" />
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NDS/MelonDS_SoundProvider.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NDS/MelonDS_SoundProvider.cs
new file mode 100644
index 0000000000..5d7e595362
--- /dev/null
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NDS/MelonDS_SoundProvider.cs
@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Runtime.InteropServices;
+
+using BizHawk.Emulation.Common;
+
+namespace BizHawk.Emulation.Cores.Consoles.Nintendo.NDS
+{
+	unsafe partial class MelonDS : ISoundProvider
+	{
+		public bool CanProvideAsync => false;
+
+		public SyncSoundMode SyncMode => SyncSoundMode.Sync;
+
+		public void DiscardSamples()
+		{
+			_DiscardSamples();
+		}
+
+		public void GetSamplesAsync(short[] samples)
+		{
+			throw new InvalidOperationException();
+		}
+
+		public void GetSamplesSync(out short[] samples, out int nsamp)
+		{
+			nsamp = GetSampleCount();
+			samples = new short[nsamp * 2]; //*2 for stereo sound
+			fixed (short* data = samples)
+			{
+				GetSamples(data, nsamp);
+			}
+		}
+
+		public void SetSyncMode(SyncSoundMode mode)
+		{
+			if (mode == SyncSoundMode.Async)
+				throw new InvalidOperationException();
+		}
+
+		[DllImport(dllPath)]
+		private static extern int GetSampleCount();
+		[DllImport(dllPath)]
+		private static extern void GetSamples(short* data, int count);
+		[DllImport(dllPath, EntryPoint = "DiscardSamples")]
+		private static extern void _DiscardSamples();
+	}
+}