From 880fd3cfcb1c394b06bdb4cd3433e23379b4fbe7 Mon Sep 17 00:00:00 2001
From: Mary <mary@mary.zone>
Date: Sat, 13 May 2023 09:15:16 +0200
Subject: audio: sdl2: Do not report 5.1 if the device doesn't support it
 (#4908)

* amadeus: adjust VirtualDevice channel configuration reporting with HardwareDevice

* audio: sdl2: Do not report 5.1 if device doesn't support it

SDL2 5.1 to Stereo conversion is terrible and make everything sound
quiet.

Let's not expose 5.1 if not truly supported by the device.
---
 .../SDL2HardwareDeviceDriver.cs                    | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src/Ryujinx.Audio.Backends.SDL2')

diff --git a/src/Ryujinx.Audio.Backends.SDL2/SDL2HardwareDeviceDriver.cs b/src/Ryujinx.Audio.Backends.SDL2/SDL2HardwareDeviceDriver.cs
index b190b4c8..d3a73cfc 100644
--- a/src/Ryujinx.Audio.Backends.SDL2/SDL2HardwareDeviceDriver.cs
+++ b/src/Ryujinx.Audio.Backends.SDL2/SDL2HardwareDeviceDriver.cs
@@ -5,6 +5,7 @@ using Ryujinx.Memory;
 using Ryujinx.SDL2.Common;
 using System;
 using System.Collections.Concurrent;
+using System.Runtime.InteropServices;
 using System.Threading;
 
 using static Ryujinx.Audio.Integration.IHardwareDeviceDriver;
@@ -18,6 +19,13 @@ namespace Ryujinx.Audio.Backends.SDL2
         private readonly ManualResetEvent _pauseEvent;
         private readonly ConcurrentDictionary<SDL2HardwareDeviceSession, byte> _sessions;
 
+        private bool _supportSurroundConfiguration;
+
+        // TODO: Add this to SDL2-CS
+        // NOTE: We use a DllImport here because of marshaling issue for spec.
+        [DllImport("SDL2")]
+        private static extern int SDL_GetDefaultAudioInfo(IntPtr name, out SDL_AudioSpec spec, int isCapture);
+
         public SDL2HardwareDeviceDriver()
         {
             _updateRequiredEvent = new ManualResetEvent(false);
@@ -25,6 +33,20 @@ namespace Ryujinx.Audio.Backends.SDL2
             _sessions = new ConcurrentDictionary<SDL2HardwareDeviceSession, byte>();
 
             SDL2Driver.Instance.Initialize();
+
+            int res = SDL_GetDefaultAudioInfo(IntPtr.Zero, out var spec, 0);
+
+            if (res != 0)
+            {
+                Logger.Error?.Print(LogClass.Application,
+                    $"SDL_GetDefaultAudioInfo failed with error \"{SDL_GetError()}\"");
+
+                _supportSurroundConfiguration = true;
+            }
+            else
+            {
+                _supportSurroundConfiguration = spec.channels == 6;
+            }
         }
 
         public static bool IsSupported => IsSupportedInternal();
@@ -164,6 +186,11 @@ namespace Ryujinx.Audio.Backends.SDL2
 
         public bool SupportsChannelCount(uint channelCount)
         {
+            if (channelCount == 6)
+            {
+                return _supportSurroundConfiguration;
+            }
+
             return true;
         }
 
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