From 182ad45eae0db5e469f2e61e238eedad30dfa248 Mon Sep 17 00:00:00 2001
From: Miro Kropacek <miro.kropacek@gmail.com>
Date: Wed, 22 Apr 2026 00:44:03 +1000
Subject: [PATCH] AUDIO: Introduce DISABLE_MAME_OPL

Similar to DISABLE_DOSBOX_OPL and DISABLE_NUKED_OPL. Now with the null
driver available, weaker backends can be completely OPL emulation free.
---
 audio/fmopl.cpp              | 4 ++++
 audio/softsynth/opl/mame.cpp | 4 ++++
 audio/softsynth/opl/mame.h   | 4 ++++
 base/commandLine.cpp         | 8 +++++++-
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/audio/fmopl.cpp b/audio/fmopl.cpp
index e24cfff6642..8eba28c3cea 100644
--- a/audio/fmopl.cpp
+++ b/audio/fmopl.cpp
@@ -81,7 +81,9 @@ OPL::OPL() {
 const Config::EmulatorDescription Config::_drivers[] = {
 	{ "auto", "<default>", kAuto, kFlagOpl2 | kFlagDualOpl2 | kFlagOpl3 },
 	{ "null", _s("None"), kNull, kFlagOpl2 | kFlagDualOpl2 | kFlagOpl3 },
+#ifndef DISABLE_MAME_OPL
 	{ "mame", _s("MAME OPL emulator"), kMame, kFlagOpl2 },
+#endif
 #ifndef DISABLE_DOSBOX_OPL
 	{ "db", _s("DOSBox OPL emulator"), kDOSBox, kFlagOpl2 | kFlagDualOpl2 | kFlagOpl3 },
 #endif
@@ -201,12 +203,14 @@ OPL *Config::create(DriverId driver, OplType type) {
 	}
 
 	switch (driver) {
+#ifndef DISABLE_MAME_OPL
 	case kMame:
 		if (type == kOpl2)
 			return new MAME::OPL();
 		else
 			warning("MAME OPL emulator only supports OPL2 emulation");
 		return nullptr;
+#endif
 
 #ifndef DISABLE_DOSBOX_OPL
 	case kDOSBox:
diff --git a/audio/softsynth/opl/mame.cpp b/audio/softsynth/opl/mame.cpp
index e2ac8891b4b..59a5dde5fd5 100644
--- a/audio/softsynth/opl/mame.cpp
+++ b/audio/softsynth/opl/mame.cpp
@@ -22,6 +22,8 @@
  *
  */
 
+#ifndef DISABLE_MAME_OPL
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -1253,3 +1255,5 @@ FM_OPL *makeAdLibOPL(int rate) {
 
 } // End of namespace MAME
 } // End of namespace OPL
+
+#endif // !DISABLE_MAME_OPL
diff --git a/audio/softsynth/opl/mame.h b/audio/softsynth/opl/mame.h
index b0968f965ad..c313564a732 100644
--- a/audio/softsynth/opl/mame.h
+++ b/audio/softsynth/opl/mame.h
@@ -26,6 +26,8 @@
 #ifndef AUDIO_SOFTSYNTH_OPL_MAME_H
 #define AUDIO_SOFTSYNTH_OPL_MAME_H
 
+#ifndef DISABLE_MAME_OPL
+
 #include "common/scummsys.h"
 #include "common/random.h"
 
@@ -196,4 +198,6 @@ protected:
 } // End of namespace MAME
 } // End of namespace OPL
 
+#endif // !DISABLE_MAME_OPL
+
 #endif
diff --git a/base/commandLine.cpp b/base/commandLine.cpp
index c6255f22648..1f5ae0583c6 100644
--- a/base/commandLine.cpp
+++ b/base/commandLine.cpp
@@ -180,7 +180,13 @@ static const char HELP_STRING4[] =
 	"  --enable-gs              Enable Roland GS mode for MIDI playback\n"
 	"  --output-channels=CHANNELS Select output channel count (e.g. 2 for stereo)\n"
 	"  --output-rate=RATE       Select output sample rate in Hz (e.g. 22050)\n"
-	"  --opl-driver=DRIVER      Select AdLib (OPL) emulator (db, mame"
+	"  --opl-driver=DRIVER      Select AdLib (OPL) emulator ("
+#ifndef DISABLE_MAME_OPL
+																	 "mame"
+#endif
+#ifndef DISABLE_DOSBOX_OPL
+																	 ", db"
+#endif
 #ifndef DISABLE_NUKED_OPL
 																	 ", nuked"
 #endif