From ff10fdf9294eb33a21c03db658a2e910e07c2d60 Mon Sep 17 00:00:00 2001
From: terminx <terminx@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Sat, 19 Oct 2019 23:48:40 +0000
Subject: [PATCH] Add mus_adlibstereo cvar to enable and disable AdLib stereo
 mode

git-svn-id: https://svn.eduke32.com/eduke32@8223 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/audiolib/src/driver_adlib.cpp | 4 ++--
 source/audiolib/src/driver_adlib.h   | 2 ++
 source/audiolib/src/fx_man.cpp       | 1 +
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/source/audiolib/src/driver_adlib.cpp b/source/audiolib/src/driver_adlib.cpp
index b5f1b508c..7b35095f4 100644
--- a/source/audiolib/src/driver_adlib.cpp
+++ b/source/audiolib/src/driver_adlib.cpp
@@ -197,7 +197,7 @@ static AdLibChannel Channel[NUMADLIBCHANNELS];
 
 static int AL_LeftPort  = ADLIB_PORT;
 static int AL_RightPort = ADLIB_PORT;
-static int AL_Stereo;
+int AL_Stereo;
 static int AL_SendStereo;
 static int AL_MaxMidiChannel = 16;
 
@@ -863,7 +863,7 @@ static int AL_Init(int rate)
 {
     OPL3_Reset(&chip, rate);
 
-    AL_Stereo    = FALSE;
+    AL_Stereo    = TRUE;
     AL_LeftPort  = ADLIB_PORT;
     AL_RightPort = ADLIB_PORT + 2;
 
diff --git a/source/audiolib/src/driver_adlib.h b/source/audiolib/src/driver_adlib.h
index 362b0210c..1ddd90544 100644
--- a/source/audiolib/src/driver_adlib.h
+++ b/source/audiolib/src/driver_adlib.h
@@ -22,6 +22,8 @@
 #include "midifuncs.h"
 #include "opl3.h"
 
+extern int AL_Stereo;
+
 int         AdLibDrv_GetError(void);
 const char *AdLibDrv_ErrorString(int ErrorNumber);
 
diff --git a/source/audiolib/src/fx_man.cpp b/source/audiolib/src/fx_man.cpp
index 25dbca26b..c9bc1cf22 100644
--- a/source/audiolib/src/fx_man.cpp
+++ b/source/audiolib/src/fx_man.cpp
@@ -73,6 +73,7 @@ int FX_Init(int numvoices, int numchannels, unsigned mixrate, void *initdata)
 
         static osdcvardata_t cvars_audiolib[] = {
             { "mus_emidicard", "force a specific EMIDI instrument set", (void *)&ASS_EMIDICard, CVAR_INT | CVAR_FUNCPTR, 0, 10 },
+            { "mus_adlibstereo", "enable/disable OPL3 stereo mode", (void *)&AL_Stereo, CVAR_BOOL | CVAR_FUNCPTR, 0, 10 },
         };
 
         if (!init++)