Codechange: Use common source for well-known SysEx messages in Windows music drivers

src/music/midi.h

@@ -141,4 +141,19 @@ enum MidiController {
 	MIDICT_MODE_POLY         = 127,
 };
 
+
+/** Well-known MIDI system exclusive message values for use with the MidiGetStandardSysexMessage function. */
+enum class MidiSysexMessage {
+	/** Reset device to General MIDI defaults */
+	ResetGM,
+	/** Reset device to (Roland) General Standard defaults */
+	ResetGS,
+	/** Reset device to (Yamaha) XG defaults */
+	ResetXG,
+	/** Set up Roland SoundCanvas reverb room as TTD does */
+	RolandSetReverb,
+};
+
+const byte *MidiGetStandardSysexMessage(MidiSysexMessage msg, size_t &length);
+
 #endif /* MUSIC_MIDI_H */