SCI: add sound driver for KQ5 FM-Towns

2 files changed, 638 insertions, 0 deletions

diff --git a/engines/sci/sound/drivers/fmtowns.cpp b/engines/sci/sound/drivers/fmtowns.cpp
new file mode 100644
index 0000000000..afa0691d77
--- /dev/null
+++ b/engines/sci/sound/drivers/fmtowns.cpp
@@ -0,0 +1,637 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "sci/sci.h"
+
+#include "common/file.h"
+#include "common/system.h"
+#include "common/textconsole.h"
+
+#include "audio/softsynth/fmtowns_pc98/towns_audio.h"
+
+#include "sci/resource.h"
+#include "sci/sound/drivers/mididriver.h"
+
+namespace Sci {
+
+class MidiDriver_FMTowns;
+
+class TownsChannel {
+public:
+	TownsChannel(MidiDriver_FMTowns *driver, uint8 id);
+	~TownsChannel() {}
+
+	void noteOff();
+	void noteOn(uint8 note, uint8 velo);
+	void pitchBend(int16 val);
+	void updateVolume();
+	void updateDuration();
+
+	uint8 _assign;
+	uint8 _note;
+	uint8 _sustain;
+	uint16 _duration;
+
+private:
+	uint8 _id;	
+	uint8 _velo;	
+	uint8 _program;
+
+	MidiDriver_FMTowns *_drv;
+};
+
+class TownsMidiPart {
+friend class MidiDriver_FMTowns;
+public:
+	TownsMidiPart(MidiDriver_FMTowns *driver, uint8 id);
+	~TownsMidiPart() {}
+
+	void noteOff(uint8 note);
+	void noteOn(uint8 note, uint8 velo);
+	void controlChangeVolume(uint8 vol);
+	void controlChangeSustain(uint8 sus);
+	void controlChangePolyphony(uint8 numChan);
+	void controlChangeAllNotesOff();
+	void programChange(uint8 prg);
+	void pitchBend(int16 val);
+
+	void addChannels(int num);
+	void dropChannels(int num);
+	
+	uint8 currentProgram() const;
+
+private:
+	int allocateChannel();
+
+	uint8 _id;
+	uint8 _program;
+	uint8 _volume;
+	uint8 _sustain;
+	uint8 _chanMissing;
+	int16 _pitchBend;
+	uint8 _outChan;
+
+	MidiDriver_FMTowns *_drv;
+};
+
+class MidiDriver_FMTowns : public MidiDriver, public TownsAudioInterfacePluginDriver {
+friend class TownsChannel;
+friend class TownsMidiPart;
+public:
+	MidiDriver_FMTowns(Audio::Mixer *mixer);
+	~MidiDriver_FMTowns();
+
+	int open();
+	void loadInstruments(const uint8 *data);
+	bool isOpen() const { return _isOpen; }
+	void close();
+
+	void send(uint32 b);
+
+	uint32 property(int prop, uint32 param);
+	void setTimerCallback(void *timer_param, Common::TimerManager::TimerProc timer_proc);
+
+	void setSoundOn(bool toggle);
+
+	uint32 getBaseTempo();
+	MidiChannel *allocateChannel() { return 0; }
+	MidiChannel *getPercussionChannel() { return 0; }
+
+	uint8 currentProgram();
+
+	void timerCallback(int timerId);
+
+private:
+	int getChannelVolume(uint8 midiPart);
+	void addMissingChannels();
+
+	void updateParser();
+	void updateChannels();
+
+	Common::TimerManager::TimerProc _timerProc;
+	void *_timerProcPara;
+
+	TownsMidiPart **_parts;
+	TownsChannel **_out;
+	
+	uint8 _masterVolume;
+
+	bool _soundOn;
+
+	bool _isOpen;
+	bool _ready;
+
+	const uint16 _baseTempo;
+
+	TownsAudioInterface *_intf;
+};
+
+class MidiPlayer_FMTowns : public MidiPlayer {
+public:
+	MidiPlayer_FMTowns(SciVersion version);
+	~MidiPlayer_FMTowns();
+
+	int open(ResourceManager *resMan);
+
+	bool hasRhythmChannel() const;
+	byte getPlayId() const;
+	int getPolyphony() const;
+	void playSwitch(bool play);
+
+private:
+	MidiDriver_FMTowns *_townsDriver;
+};
+
+TownsChannel::TownsChannel(MidiDriver_FMTowns *driver, uint8 id) : _drv(driver), _id(id), _assign(0xff), _note(0xff), _velo(0), _sustain(0), _duration(0), _program(0xff) {
+}
+
+void TownsChannel::noteOn(uint8 note, uint8 velo) {
+	_duration = 0;
+
+	if (_program != _drv->_parts[_assign]->currentProgram() && _drv->_soundOn) {
+		_program = _drv->_parts[_assign]->currentProgram();
+		_drv->_intf->callback(4, _id, _program);
+	}
+
+	_note = note;
+	_velo = velo;
+	_drv->_intf->callback(1, _id, _note, _velo);
+}
+
+void TownsChannel::noteOff() {
+	if (_sustain)
+		return;
+
+	_drv->_intf->callback(2, _id);
+	_note = 0xff;
+	_duration = 0;
+}
+
+void TownsChannel::pitchBend(int16 val) {
+	_drv->_intf->callback(7, _id, val);
+}
+
+void TownsChannel::updateVolume() {
+	if (_assign > 15)
+		return;
+	_drv->_intf->callback(8, _id, _drv->getChannelVolume(_assign));
+}
+
+void TownsChannel::updateDuration() {
+	if (_note != 0xff)
+		_duration++;
+}
+
+TownsMidiPart::TownsMidiPart(MidiDriver_FMTowns *driver, uint8 id) : _drv(driver), _id(id), _program(0), _volume(0x3f), _sustain(0), _chanMissing(0), _pitchBend(0x2000), _outChan(0) {
+}
+
+void TownsMidiPart::noteOff(uint8 note) {
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign != _id || _drv->_out[i]->_note != note)
+			continue;
+		if (_sustain)
+			_drv->_out[i]->_sustain = 1;
+		else
+			_drv->_out[i]->noteOff();
+		return;
+	}
+}
+
+void TownsMidiPart::noteOn(uint8 note, uint8 velo) {
+	if (note < 12 || note > 107)
+		return;
+
+	if (velo == 0) {
+		noteOff(note);
+		return;
+	}
+
+	velo >>= 1;
+
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign != _id || _drv->_out[i]->_note != note)
+			continue;
+		_drv->_out[i]->_sustain = 0;
+		_drv->_out[i]->noteOff();
+		_drv->_out[i]->noteOn(note, velo);
+		return;
+	}
+
+	int chan = allocateChannel();
+	if (chan != -1)
+		_drv->_out[chan]->noteOn(note, velo);
+}
+
+void TownsMidiPart::controlChangeVolume(uint8 vol) {
+	_volume = vol >> 1;
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign == _id)
+			_drv->_out[i]->updateVolume();
+	}
+}
+
+void TownsMidiPart::controlChangeSustain(uint8 sus) {
+	_sustain = sus;
+	if (_sustain)
+		return;
+
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign == _id && _drv->_out[i]->_sustain) {
+			_drv->_out[i]->_sustain = 0;
+			_drv->_out[i]->noteOff();
+		}
+	}
+}
+
+void TownsMidiPart::controlChangePolyphony(uint8 numChan) {
+	uint8 numAssigned = 0;
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign == _id)
+			numAssigned++;
+	}
+
+	numAssigned += _chanMissing;
+	if (numAssigned < numChan) {
+		addChannels(numChan - numAssigned);
+	} else if (numAssigned > numChan) {
+		dropChannels(numAssigned - numChan);
+		_drv->addMissingChannels();
+	}
+}
+
+void TownsMidiPart::controlChangeAllNotesOff() {
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign == _id && _drv->_out[i]->_note != 0xff)
+			_drv->_out[i]->noteOff();
+	}
+}
+
+void TownsMidiPart::programChange(uint8 prg) {
+	_program = prg;
+}
+
+void TownsMidiPart::pitchBend(int16 val) {
+	_pitchBend = val;
+	val -= 0x2000;
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign == _id)
+			_drv->_out[i]->pitchBend(val);
+	}
+}
+
+void TownsMidiPart::addChannels(int num) {
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign != 0xff)
+			continue;
+
+		_drv->_out[i]->_assign = _id;
+		_drv->_out[i]->updateVolume();
+
+		if (_drv->_out[i]->_note != 0xff)
+			_drv->_out[i]->noteOff();
+
+		if (!--num)
+			break;
+	}
+
+	_chanMissing += num;
+	programChange(_program);
+}
+
+void TownsMidiPart::dropChannels(int num) {
+	if (_chanMissing == num) {
+		_chanMissing = 0;
+		return;
+	} else if (_chanMissing > num) {
+		_chanMissing -= num;
+		return;
+	}
+
+	num -= _chanMissing;
+	_chanMissing = 0;
+
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign != _id || _drv->_out[i]->_note != 0xff)
+			continue;
+		_drv->_out[i]->_assign = 0xff;
+		if (!--num)
+			return;
+	}
+
+	for (int i = 0; i < 6; i++) {
+		if (_drv->_out[i]->_assign != _id)
+			continue;
+		_drv->_out[i]->_sustain = 0;
+		_drv->_out[i]->noteOff();
+		_drv->_out[i]->_assign = 0xff;
+		if (!--num)
+			return;
+	}
+}
+
+uint8 TownsMidiPart::currentProgram() const {
+	return _program;
+}
+
+int TownsMidiPart::allocateChannel() {
+	int chan = _outChan;
+	int ovrChan = 0;
+	int ld = 0;
+	bool found = false;
+
+	for (bool loop = true; loop; ) {
+		if (++chan == 6)
+			chan = 0;
+
+		if (chan == _outChan)
+			loop = false;
+
+		if (_id == _drv->_out[chan]->_assign) {
+			if (_drv->_out[chan]->_note == 0xff) {
+				found = true;
+				break;
+			}
+
+			if (_drv->_out[chan]->_duration >= ld) {
+				ld = _drv->_out[chan]->_duration;
+				ovrChan = chan;
+			}
+		}
+	}
+
+	if (!found) {
+		if (!ld)
+			return -1;
+		chan = ovrChan;
+		_drv->_out[chan]->_sustain = 0;
+		_drv->_out[chan]->noteOff();
+	}
+
+	_outChan = chan;
+	return chan;
+}
+
+MidiDriver_FMTowns::MidiDriver_FMTowns(Audio::Mixer *mixer) : _timerProc(0), _timerProcPara(0), _baseTempo(10080), _ready(false), _isOpen(false), _masterVolume(0x0f), _soundOn(true) {
+	_intf = new TownsAudioInterface(mixer, this, true);
+	_out = new TownsChannel*[6];
+	for (int i = 0; i < 6; i++)
+		_out[i] = new TownsChannel(this, i);
+	_parts = new TownsMidiPart*[16];
+	for (int i = 0; i < 16; i++)
+		_parts[i] = new TownsMidiPart(this, i);
+}
+
+MidiDriver_FMTowns::~MidiDriver_FMTowns() {
+	delete _intf;
+
+	if (_parts) {
+		for (int i = 0; i < 16; i++) {
+			delete _parts[i];
+			_parts[i] = 0;
+		}
+		delete[] _parts;
+		_parts = 0;
+	}
+
+	if (_out) {
+		for (int i = 0; i < 6; i++) {
+			delete _out[i];
+			_out[i] = 0;
+		}
+		delete[] _out;
+		_out = 0;
+	}
+}
+
+int MidiDriver_FMTowns::open() {
+	if (_isOpen)
+		return MERR_ALREADY_OPEN;
+
+	if (!_ready) {
+		if (!_intf->init())
+			return MERR_CANNOT_CONNECT;
+
+		_intf->callback(0);
+
+		_intf->callback(21, 255, 1);
+		_intf->callback(21, 0, 1);
+		_intf->callback(22, 255, 221);
+
+		_intf->callback(33, 8);
+		_intf->setSoundEffectChanMask(~0x3f);
+
+		_ready = true;
+	}
+
+	_isOpen = true;
+
+	return 0;
+}
+
+void MidiDriver_FMTowns::loadInstruments(const uint8 *data) {
+	if (data) {
+		data += 6;
+		for (int i = 0; i < 128; i++) {
+			_intf->callback(5, 0, i, data);
+			data += 48;
+		}
+	}
+	_intf->callback(70, 3);
+	property(MIDI_PROP_MASTER_VOLUME, _masterVolume);
+}
+
+void MidiDriver_FMTowns::close() {
+	_isOpen = false;
+}
+
+void MidiDriver_FMTowns::send(uint32 b) {
+	if (!_isOpen)
+		return;
+
+	byte para2 = (b >> 16) & 0xFF;
+	byte para1 = (b >> 8) & 0xFF;
+	byte cmd = b & 0xF0;
+
+	TownsMidiPart *chan = _parts[b & 0x0F];
+
+	switch (cmd) {
+	case 0x80:
+		chan->noteOff(para1);
+		break;
+	case 0x90:
+		chan->noteOn(para1, para2);
+		break;
+	case 0xb0:
+		switch (para1) {
+		case 7:
+			chan->controlChangeVolume(para2);
+			break;
+		case 64:
+			chan->controlChangeSustain(para2);
+			break;
+		case SCI_MIDI_SET_POLYPHONY:
+			chan->controlChangePolyphony(para2);
+			break;
+		case SCI_MIDI_CHANNEL_NOTES_OFF:
+			chan->controlChangeAllNotesOff();
+			break;
+		default:
+			break;
+		}
+		break;
+	case 0xc0:
+		chan->programChange(para1);
+		break;
+	case 0xe0:
+		chan->pitchBend(para1 | (para2 << 7));
+		break;
+	default:
+		break;
+	}
+}
+
+uint32 MidiDriver_FMTowns::property(int prop, uint32 param) {
+	switch(prop) {
+	case MIDI_PROP_MASTER_VOLUME:
+		if (param != 0xffff) {
+			_masterVolume = param;
+			for (int i = 0; i < 6; i++)
+				_out[i]->updateVolume();
+		}
+		return _masterVolume;
+	default:
+		break;
+	}
+	return 0;
+}
+
+void MidiDriver_FMTowns::setTimerCallback(void *timer_param, Common::TimerManager::TimerProc timer_proc) {
+	_timerProc = timer_proc;
+	_timerProcPara = timer_param;
+}
+
+void MidiDriver_FMTowns::setSoundOn(bool toggle) {
+	_soundOn = toggle;
+}
+
+uint32 MidiDriver_FMTowns::getBaseTempo() {
+	return _baseTempo;
+}
+
+void MidiDriver_FMTowns::timerCallback(int timerId) {
+	if (!_isOpen)
+		return;
+
+	switch (timerId) {
+	case 1:
+		updateParser();
+		updateChannels();
+		break;
+	default:
+		break;
+	}
+}
+
+int MidiDriver_FMTowns::getChannelVolume(uint8 midiPart) {
+	static const uint8 volumeTable[] = { 0x00, 0x0D, 0x1B, 0x28, 0x36, 0x43, 0x51, 0x5F, 0x63, 0x67, 0x6B, 0x6F, 0x73, 0x77, 0x7B, 0x7F };
+	int tableIndex = (_parts[midiPart]->_volume * (_masterVolume + 1)) >> 6;
+	assert(tableIndex < 16);
+	return volumeTable[tableIndex];;
+}
+
+void MidiDriver_FMTowns::addMissingChannels() {
+	uint8 avlChan = 0;
+	for (int i = 0; i < 6; i++) {
+		if (_out[i]->_assign == 0xff)
+			avlChan++;
+	}
+
+	if (!avlChan)
+		return;
+
+	for (int i = 0; i < 16; i++) {
+		if (!_parts[i]->_chanMissing)
+			continue;
+
+		if (_parts[i]->_chanMissing < avlChan) {
+			avlChan -= _parts[i]->_chanMissing;
+			uint8 m = _parts[i]->_chanMissing;
+			_parts[i]->_chanMissing = 0;
+			_parts[i]->addChannels(m);			
+		} else {
+			_parts[i]->_chanMissing -= avlChan;
+			_parts[i]->addChannels(avlChan);
+			return;
+		}
+	}
+}
+
+void MidiDriver_FMTowns::updateParser() {
+	if (_timerProc)
+		_timerProc(_timerProcPara);		
+}
+
+void MidiDriver_FMTowns::updateChannels() {
+	for (int i = 0; i < 6; i++)
+		_out[i]->updateDuration();
+}
+
+MidiPlayer_FMTowns::MidiPlayer_FMTowns(SciVersion version) : MidiPlayer(version) {
+	_driver = _townsDriver = new MidiDriver_FMTowns(g_system->getMixer());
+}
+
+MidiPlayer_FMTowns::~MidiPlayer_FMTowns() {
+	delete _driver;
+}
+
+int MidiPlayer_FMTowns::open(ResourceManager *resMan) {
+	int result = MidiDriver::MERR_DEVICE_NOT_AVAILABLE;
+	if (_townsDriver) {
+		result = _townsDriver->open();
+		if (!result)			
+			_townsDriver->loadInstruments((resMan->findResource(ResourceId(kResourceTypePatch, 8), true))->data);
+	}
+	return result;
+}
+
+bool MidiPlayer_FMTowns::hasRhythmChannel() const {
+	return false;
+}
+
+byte MidiPlayer_FMTowns::getPlayId() const {
+	return 0x16;
+}
+
+int MidiPlayer_FMTowns::getPolyphony() const {
+	return 6;
+}
+
+void MidiPlayer_FMTowns::playSwitch(bool play) {
+	if (_townsDriver)
+		_townsDriver->setSoundOn(play);
+}
+
+MidiPlayer *MidiPlayer_FMTowns_create(SciVersion _soundVersion) {
+	return new MidiPlayer_FMTowns(_soundVersion);
+}
+
+} // End of namespace Sci
\ No newline at end of file
diff --git a/engines/sci/sound/drivers/mididriver.h b/engines/sci/sound/drivers/mididriver.h
index ec66984bd4..8938eef62f 100644
--- a/engines/sci/sound/drivers/mididriver.h
+++ b/engines/sci/sound/drivers/mididriver.h
@@ -130,6 +130,7 @@ extern MidiPlayer *MidiPlayer_PCSpeaker_create(SciVersion version);
 extern MidiPlayer *MidiPlayer_CMS_create(SciVersion version);
 extern MidiPlayer *MidiPlayer_Midi_create(SciVersion version);
 extern MidiPlayer *MidiPlayer_Fb01_create(SciVersion version);
+extern MidiPlayer *MidiPlayer_FMTowns_create(SciVersion version);
 
 } // End of namespace Sci