Don't enforce MT32 defaults on XMI files

This fully depends on bank: different AIL-based games used MT32 or GeneralMIDI depending on their bank and compilation options.

src/opnbank.h

@@ -129,6 +129,7 @@ struct OpnBankSetup
     int lfoEnable;
     int lfoFrequency;
     int chipType;
+    bool mt32defaults;
 };
 
 /**

src/opnmidi_load.cpp

@@ -115,6 +115,8 @@ bool OPNMIDIplay::LoadBank(FileAndMemReader &fr)
     synth.m_insBankSetup.lfoEnable = (wopn->lfo_freq & 8) != 0;
     synth.m_insBankSetup.lfoFrequency = wopn->lfo_freq & 7;
     synth.m_insBankSetup.chipType = wopn->chip_type;
+    // FIXME: Implement the bank-side flag to enable this
+    synth.m_insBankSetup.mt32defaults = false;
     m_setup.VolumeModel = OPNMIDI_VolumeModel_AUTO;
     m_setup.lfoEnable = -1;
     m_setup.lfoFrequency = -1;

src/opnmidi_midiplay.cpp

@@ -206,15 +206,15 @@ void OPNMIDIplay::resetMIDIDefaults(int offset)
     for(size_t c = offset, n = m_midiChannels.size(); c < n; ++c)
     {
         MIDIchannel &ch = m_midiChannels[c];
-        if(synth.m_musicMode == Synth::MODE_XMIDI)
+
+        if(synth.m_musicMode == Synth::MODE_RSXX)
+            ch.def_volume = 127;
+        else if(synth.m_insBankSetup.mt32defaults)
         {
             ch.def_volume = 127;
             ch.def_bendsense_lsb = 0;
             ch.def_bendsense_msb = 12;
         }
-        else
-        if(synth.m_musicMode == Synth::MODE_RSXX)
-            ch.def_volume = 127;
     }
 }
 

src/opnmidi_opn2.cpp

@@ -227,6 +227,7 @@ OPN2::OPN2() :
     m_insBankSetup.lfoEnable = false;
     m_insBankSetup.lfoFrequency = 0;
     m_insBankSetup.chipType = OPNChip_OPN2;
+    m_insBankSetup.mt32defaults = false;
 
     // Initialize blank instruments banks
     m_insBanks.clear();