From f7b1ebca279e7eb3eebc11c9becb010638f17396 Mon Sep 17 00:00:00 2001
From: Christopher Snowhill <kode54@gmail.com>
Date: Tue, 24 Jun 2025 03:38:15 -0700
Subject: [PATCH] Output: Halve volume when downmixing to mono

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
---
 Audio/Chain/DSP/Downmix.m                     |  2 +
 .../xcschemes/GME Plugin.xcscheme             | 76 -------------------
 .../{MAD.xcscheme => minimp3.xcscheme}        | 18 ++---
 3 files changed, 11 insertions(+), 85 deletions(-)
 delete mode 100644 Plugins/libvgmPlayer/libvgmPlayer.xcodeproj/xcshareddata/xcschemes/GME Plugin.xcscheme
 rename Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/{MAD.xcscheme => minimp3.xcscheme} (85%)

diff --git a/Audio/Chain/DSP/Downmix.m b/Audio/Chain/DSP/Downmix.m
index 4d91f108f..c48fc72e6 100644
--- a/Audio/Chain/DSP/Downmix.m
+++ b/Audio/Chain/DSP/Downmix.m
@@ -157,6 +157,8 @@ static void downmix_to_mono(const float *inBuffer, int channels, uint32_t config
 	}
 	cblas_scopy((int)count, inBuffer, 2, outBuffer, 1);
 	vDSP_vadd(outBuffer, 1, inBuffer + 1, 2, outBuffer, 1, count);
+	const float scale = 0.5f;
+	vDSP_vsmul(outBuffer, 1, &scale, outBuffer, 1, count);
 }
 
 static void upmix(const float *inBuffer, int inchannels, uint32_t inconfig, float *outBuffer, int outchannels, uint32_t outconfig, size_t count) {
diff --git a/Plugins/libvgmPlayer/libvgmPlayer.xcodeproj/xcshareddata/xcschemes/GME Plugin.xcscheme b/Plugins/libvgmPlayer/libvgmPlayer.xcodeproj/xcshareddata/xcschemes/GME Plugin.xcscheme
deleted file mode 100644
index eb2168b4a..000000000
--- a/Plugins/libvgmPlayer/libvgmPlayer.xcodeproj/xcshareddata/xcschemes/GME Plugin.xcscheme	
+++ /dev/null
@@ -1,76 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "1640"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "8D5B49AC048680CD000E48DA"
-               BuildableName = "GME.bundle"
-               BlueprintName = "GME Plugin"
-               ReferencedContainer = "container:GME.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8D5B49AC048680CD000E48DA"
-            BuildableName = "GME.bundle"
-            BlueprintName = "GME Plugin"
-            ReferencedContainer = "container:GME.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8D5B49AC048680CD000E48DA"
-            BuildableName = "GME.bundle"
-            BlueprintName = "GME Plugin"
-            ReferencedContainer = "container:GME.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/MAD.xcscheme b/Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/minimp3.xcscheme
similarity index 85%
rename from Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/MAD.xcscheme
rename to Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/minimp3.xcscheme
index 4de6f86ba..00b1a7e2c 100644
--- a/Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/MAD.xcscheme
+++ b/Plugins/minimp3/minimp3.xcodeproj/xcshareddata/xcschemes/minimp3.xcscheme
@@ -15,9 +15,9 @@
                   <BuildableReference
                      BuildableIdentifier = "primary"
                      BlueprintIdentifier = "8372C92227C785BD00E250C9"
-                     BuildableName = "MAD.bundle"
-                     BlueprintName = "MAD"
-                     ReferencedContainer = "container:MAD.xcodeproj">
+                     BuildableName = "minimp3.bundle"
+                     BlueprintName = "minimp3"
+                     ReferencedContainer = "container:minimp3.xcodeproj">
                   </BuildableReference>
                </EnvironmentBuildable>
             </ActionContent>
@@ -33,9 +33,9 @@
             <BuildableReference
                BuildableIdentifier = "primary"
                BlueprintIdentifier = "8372C92227C785BD00E250C9"
-               BuildableName = "MAD.bundle"
-               BlueprintName = "MAD"
-               ReferencedContainer = "container:MAD.xcodeproj">
+               BuildableName = "minimp3.bundle"
+               BlueprintName = "minimp3"
+               ReferencedContainer = "container:minimp3.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
       </BuildActionEntries>
@@ -69,9 +69,9 @@
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "8372C92227C785BD00E250C9"
-            BuildableName = "MAD.bundle"
-            BlueprintName = "MAD"
-            ReferencedContainer = "container:MAD.xcodeproj">
+            BuildableName = "minimp3.bundle"
+            BlueprintName = "minimp3"
+            ReferencedContainer = "container:minimp3.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
    </ProfileAction>