- fixed: Do not pass Sysex messages to Windows's GS Wavetable synth.

This will totally refuse to play a MIDI if that happens.
Duke Nukem's Alienz.mid, which did not play before works after this change.

src/sound/i_musicinterns.h

@@ -82,6 +82,7 @@ public:
 	virtual bool Preprocess(MIDIStreamer *song, bool looping);
 	virtual FString GetStats();
 	virtual int GetDeviceType() const { return MDEV_DEFAULT; }
+	virtual bool CanHandleSysex() const { return true; }
 };
 
 

src/sound/mididevices/music_win_mididevice.cpp

@@ -86,6 +86,12 @@ public:
 	bool Update() override;
 	void PrecacheInstruments(const uint16_t *instruments, int count);
 	DWORD PlayerLoop();
+	bool CanHandleSysex() const override
+	{
+		// No Sysex for GS synth.
+		return VolumeWorks;
+	}
+
 
 //protected:
 	static void CALLBACK CallbackFunc(HMIDIOUT, UINT, DWORD_PTR, DWORD, DWORD);

src/sound/midisources/midisource.h

@@ -25,6 +25,7 @@ class MIDISource
 protected:
 
 	bool isLooping = false;
+	bool skipSysex = false;
 	int Division = 0;
 	int Tempo = 500000;
 	int InitialTempo = 500000;
@@ -55,6 +56,8 @@ public:
 		isLooping = looped;
 	}
 
+	void SkipSysex() { skipSysex = true; }
+	
 	bool isValid() const { return Division > 0; }
 	int getDivision() const { return Division; }
 	int getInitialTempo() const { return InitialTempo; }

src/sound/midisources/midisource_hmi.cpp

@@ -644,7 +644,7 @@ uint32_t *HMISong::SendCommand (uint32_t *events, TrackInfo *track, uint32_t del
 		if (event == MIDI_SYSEX || event == MIDI_SYSEXEND)
 		{
 			len = ReadVarLen(track);
-			if (len >= (MAX_MIDI_EVENTS-1)*3*4)
+			if (len >= (MAX_MIDI_EVENTS-1)*3*4 || skipSysex)
 			{ // This message will never fit. Throw it away.
 				track->TrackP += len;
 			}

src/sound/midisources/midisource_smf.cpp

@@ -585,7 +585,7 @@ uint32_t *MIDISong2::SendCommand (uint32_t *events, TrackInfo *track, uint32_t d
 		if (event == MIDI_SYSEX || event == MIDI_SYSEXEND)
 		{
 			len = track->ReadVarLen();
-			if (len >= (MAX_MIDI_EVENTS-1)*3*4)
+			if (len >= (MAX_MIDI_EVENTS-1)*3*4 || skipSysex)
 			{ // This message will never fit. Throw it away.
 				track->TrackP += len;
 			}

src/sound/midisources/midisource_xmi.cpp

@@ -515,7 +515,7 @@ uint32_t *XMISong::SendCommand (uint32_t *events, EventSource due, uint32_t dela
 		if (event == MIDI_SYSEX || event == MIDI_SYSEXEND)
 		{
 			len = track->ReadVarLen();
-			if (len >= (MAX_MIDI_EVENTS-1)*3*4)
+			if (len >= (MAX_MIDI_EVENTS-1)*3*4 || skipSysex)
 			{ // This message will never fit. Throw it away.
 				track->EventP += len;
 			}

src/sound/musicformats/music_midistream.cpp

@@ -364,6 +364,7 @@ bool MIDIStreamer::InitPlayback()
 	}
 
 	source->CheckCaps(MIDI->GetTechnology());
+	if (!MIDI->CanHandleSysex()) source->SkipSysex();
 
 	if (MIDI->Preprocess(this, m_Looping))
 	{