Ticket #8542: agos_adlib.diff

engines/agos/midi.h

@@ -36 +36 @@
 
 namespace AGOS {
 
+enum {
+        PROP_ADLIB
+};
+
 struct MusicInfo {
         MidiParser *parser;
         byte *data;
@@ -61 +65 @@
         MidiDriver *_driver;
         bool _map_mt32_to_gm;
         bool _passThrough;
+        bool _adlib;
 
         MusicInfo _music;
         MusicInfo _sfx;
@@ -78 +83 @@
         byte _queuedTrack;
         bool _loopQueuedTrack;
 
+        byte *_adlibPatches;
+
 protected:
         static void onTimer(void *data);
         void clearConstructs();
         void clearConstructs(MusicInfo &info);
         void resetVolumeTable();
+        void loadAdlibPatches();
+        void unloadAdlibPatches();
 
 public:
         bool _enable_sfx;
@@ -115 +124 @@
         int open();
         void close();
         void send(uint32 b);
+        uint32 property(int prop, uint32 param);
 
         void metaEvent(byte type, byte *data, uint16 length);
         void setPassThrough(bool b)             { _passThrough = b; }

engines/agos/agos.cpp

@@ -560 +560 @@
                         _driver->property(MidiDriver::PROP_CHANNEL_MASK, 0x03FE);
                 }
 
+                if (midiDriver == MD_ADLIB) {
+                        _midi.property(PROP_ADLIB, 1);
+                }
+
                 _midi.mapMT32toGM (getGameType() != GType_SIMON2 && !_nativeMT32);
 
                 _midi.setDriver(_driver);

engines/agos/midi.cpp

@@ -46 +46 @@
         _map_mt32_to_gm = false;
         _passThrough = false;
 
+        _adlib = false;
+        _adlibPatches = NULL;
+
         _enable_sfx = true;
         _current = 0;
 
@@ -92 +95 @@
                 _driver->close();
         _driver = NULL;
         clearConstructs();
+        unloadAdlibPatches();
 //      _system->unlockMutex(_mutex);
 }
 
@@ -114 +118 @@
                 else if (_current == &_music)
                         volume = volume * _musicVolume / 255;
                 b = (b & 0xFF00FFFF) | (volume << 16);
-        } else if ((b & 0xF0) == 0xC0 && _map_mt32_to_gm) {
-                b = (b & 0xFFFF00FF) | (MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8);
+        } else if ((b & 0xF0) == 0xC0) {
+                if (_map_mt32_to_gm && (!_adlib || !_adlibPatches)) {
+                        b = (b & 0xFFFF00FF) | (MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8);
+                }
         } else if ((b & 0xFFF0) == 0x007BB0) {
                 // Only respond to an All Notes Off if this channel
                 // has already been allocated.
@@ -144 +150 @@
                         else if (_current == &_music)
                                 _current->channel[9]->volume(_current->volume[9] * _musicVolume / 255);
                 }
-                _current->channel[channel]->send(b);
+                if ((b & 0xF0) == 0xC0 && _adlib && _adlibPatches) {
+                        // NOTE: In the percussion channel, this function is a
+                        //       no-op. Any percussion instruments you hear may
+                        //       be the stock ones from adlib.cpp.
+                        _driver->sysEx_customInstrument(_current->channel[channel]->getNumber(), 'ADL ', _adlibPatches + 30 * ((b >> 8) & 0xFF));
+                } else {
+                        _current->channel[channel]->send(b);
+                }
                 if ((b & 0xFFF0) == 0x79B0) {
                         // We have received a "Reset All Controllers" message
                         // and passed it on to the MIDI driver. This may or may
@@ -160 +173 @@
         }
 }
 
+uint32 MidiPlayer::property(int prop, uint32 param) {
+        if (prop == PROP_ADLIB) {
+                uint32 ret = _adlib ? 1 : 0;
+                _adlib = (param != 0);
+                if (_adlib)
+                        loadAdlibPatches();
+                else
+                        unloadAdlibPatches();
+                return ret;
+        }
+        return MidiDriver::property(prop, param);
+}
+
 void MidiPlayer::metaEvent(byte type, byte *data, uint16 length) {
         // Only thing we care about is End of Track.
         if (!_current || type != 0x2F) {
@@ -376 +402 @@
         }
 }
 
+void MidiPlayer::loadAdlibPatches() {
+        if (!_adlib)
+                return;
+
+        Common::File ibk;
+
+        if (!ibk.open("mt_fm.ibk"))
+                return;
+
+        if (ibk.readUint32BE() == 0x49424b1a) {
+                _adlibPatches = new byte[128 * 30];
+                byte *ptr = _adlibPatches;
+
+                memset(_adlibPatches, 0, 128 * 30);
+
+                for (int i = 0; i < 128; i++) {
+                        byte instr[16];
+
+                        ibk.read(instr, 16);
+
+                        ptr[0] = instr[0];   // Modulator Sound Characteristics
+                        ptr[1] = instr[2];   // Modulator Scaling/Output Level
+                        ptr[2] = ~instr[4];  // Modulator Attack/Decay
+                        ptr[3] = ~instr[6];  // Modulator Sustain/Release
+                        ptr[4] = instr[8];   // Modulator Wave Select
+                        ptr[5] = instr[1];   // Carrier Sound Characteristics
+                        ptr[6] = instr[3];   // Carrier Scaling/Output Level
+                        ptr[7] = ~instr[5];  // Carrier Attack/Delay
+                        ptr[8] = ~instr[7];  // Carrier Sustain/Release
+                        ptr[9] = instr[9];   // Carrier Wave Select
+                        ptr[10] = instr[10]; // Feedback/Connection
+
+                        // The remaining six bytes are reserved for future use
+
+                        ptr += 30;
+                }
+        }
+}
+
+void MidiPlayer::unloadAdlibPatches() {
+        delete[] _adlibPatches;
+        _adlibPatches = NULL;
+}
+
 static const int simon1_gmf_size[] = {
         8900, 12166, 2848, 3442, 4034, 4508, 7064, 9730, 6014, 4742, 3138,
         6570, 5384, 8909, 6457, 16321, 2742, 8968, 4804, 8442, 7717,