FM-TOWNS AUDIO: Some more midi driver code for FM-TOWNS monkey2 and indy4

1 files changed, 239 insertions, 0 deletions

diff --git a/audio/softsynth/fmtowns_pc98/towns_midi.cpp b/audio/softsynth/fmtowns_pc98/towns_midi.cpp
new file mode 100644
index 0000000000..c223d44c11
--- /dev/null
+++ b/audio/softsynth/fmtowns_pc98/towns_midi.cpp
@@ -0,0 +1,239 @@
+/* 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.
+ *
+ * $URL:  $
+ * $Id:  $
+ */
+
+#include "audio/softsynth/fmtowns_pc98/towns_midi.h"
+#include "common/textconsole.h"
+
+class MidiChannel_TOWNS : public MidiChannel {
+public:
+	MidiChannel_TOWNS(MidiDriver_TOWNS *driver);
+	~MidiChannel_TOWNS();
+
+	MidiDriver *device() { return _driver; }
+	byte getNumber() { return 0; }
+	void release();
+
+	void send(uint32 b);
+
+	void noteOff(byte note);
+	void noteOn(byte note, byte velocity);
+	void programChange(byte program);
+	void pitchBend(int16 bend);
+	void controlChange(byte control, byte value);
+	void pitchBendFactor(byte value);
+	void priority(byte value);
+
+	void sysEx_customInstrument(uint32 type, const byte *instr);
+
+private:
+	MidiDriver_TOWNS *_driver;
+};
+
+MidiChannel_TOWNS::MidiChannel_TOWNS(MidiDriver_TOWNS *driver) : MidiChannel(), _driver(driver) {
+
+}
+
+MidiChannel_TOWNS::~MidiChannel_TOWNS() {
+
+}
+
+void MidiChannel_TOWNS::release() {
+
+}
+
+void MidiChannel_TOWNS::send(uint32 b) {
+
+}
+
+void MidiChannel_TOWNS::noteOff(byte note) {
+
+}
+
+void MidiChannel_TOWNS::noteOn(byte note, byte velocity) {
+
+}
+
+void MidiChannel_TOWNS::programChange(byte program) {
+
+}
+
+void MidiChannel_TOWNS::pitchBend(int16 bend) {
+
+}
+
+void MidiChannel_TOWNS::controlChange(byte control, byte value) {
+
+}
+
+void MidiChannel_TOWNS::pitchBendFactor(byte value) {
+
+}
+
+void MidiChannel_TOWNS::priority(byte value) {
+
+}
+
+void MidiChannel_TOWNS::sysEx_customInstrument(uint32 type, const byte *instr) {
+
+}
+
+MidiDriver_TOWNS::MidiDriver_TOWNS(Audio::Mixer *mixer) : _timerBproc(0), _timerBpara(0), _open(false) {
+	_intf = new TownsAudioInterface(mixer, this);
+	_channels = new MidiChannel_TOWNS*[16];
+	for (int i = 0; i < 16; i++)
+		_channels[i] = new MidiChannel_TOWNS(this);
+
+	_tickCounter = 0;
+	_curChan = 0;
+	//unbuffered write:	_intf->callback(17, part, reg, val);
+	//buffered write:	_intf->callback(19, part, reg, val);
+}
+
+MidiDriver_TOWNS::~MidiDriver_TOWNS() {
+	close();
+	delete _intf;
+	setTimerCallback(0, 0);
+
+	for (int i = 0; i < 16; i++)
+		delete _channels[i];
+	delete[] _channels;
+}
+
+int MidiDriver_TOWNS::open() {
+	if (_open)
+		return MERR_ALREADY_OPEN;
+
+	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);
+
+	_open = true;
+
+	return 0;
+}
+
+void MidiDriver_TOWNS::close() {
+	_open = false;
+}
+
+void MidiDriver_TOWNS::send(uint32 b) {
+	byte param2 = (b >> 16) & 0xFF;
+	byte param1 = (b >> 8) & 0xFF;
+	byte cmd = b & 0xF0;
+
+	/*AdLibPart *part;
+	if (chan == 9)
+		part = &_percussion;
+	else**/
+	MidiChannel_TOWNS *c = _channels[b & 0x0F];
+
+	switch (cmd) {
+	case 0x80:
+		//part->noteOff(param1);
+		break;
+	case 0x90:
+		//part->noteOn(param1, param2);
+		if (param2)
+			c->noteOn(param1, param2);
+		else
+			c->noteOff(param1);
+		break;
+	case 0xB0:
+		// supported: 1, 7, 0x40
+		c->controlChange(param1, param2);
+		break;
+	case 0xC0:
+		c->programChange(param1);
+		break;
+	case 0xE0:
+		//part->pitchBend((param1 | (param2 << 7)) - 0x2000);
+		c->pitchBend((param1 | (param2 << 7)) - 0x2000);
+		break;
+	case 0xF0:
+		warning("MidiDriver_ADLIB: Receiving SysEx command on a send() call");
+		break;
+
+	default:
+		break;
+	}
+}
+
+void MidiDriver_TOWNS::setTimerCallback(void *timer_param, Common::TimerManager::TimerProc timer_proc) {
+	_timerBproc = timer_proc;
+	_timerBpara = timer_param;
+}
+
+uint32 MidiDriver_TOWNS::getBaseTempo() {
+	return 0;
+}
+
+MidiChannel *MidiDriver_TOWNS::allocateChannel() {
+	MidiChannel *res = 0;
+
+	for (int i = 0; i < 6; i++) {
+		if (++_curChan == 6)
+			_curChan = 0;
+
+		//if (_channels[i]->   //// )
+		//	return _channels[i];
+
+	}
+
+	//if (res)
+	//	res->noteOff();
+
+	return res;
+}
+
+MidiChannel *MidiDriver_TOWNS::getPercussionChannel() {
+	return 0;
+}
+
+void MidiDriver_TOWNS::timerCallback(int timerId) {
+	if (!_open)
+		return;
+
+	switch (timerId) {
+	case 1:
+		if (_timerBproc) {
+			_timerBproc(_timerBpara);
+			_tickCounter += 10000;
+			while (_tickCounter >= 4167) {
+				_tickCounter -= 4167;
+				//_timerBproc(_timerBpara);
+			}
+		}
+		break;
+	default:
+		break;
+	}
+}