diff options
Diffstat (limited to 'sound/softsynth/fmtowns_pc98/towns_euphony.cpp')
-rw-r--r-- | sound/softsynth/fmtowns_pc98/towns_euphony.cpp | 886 |
1 files changed, 886 insertions, 0 deletions
diff --git a/sound/softsynth/fmtowns_pc98/towns_euphony.cpp b/sound/softsynth/fmtowns_pc98/towns_euphony.cpp new file mode 100644 index 0000000000..54b5d5b1d6 --- /dev/null +++ b/sound/softsynth/fmtowns_pc98/towns_euphony.cpp @@ -0,0 +1,886 @@ +/* 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 "sound/softsynth/fmtowns_pc98/towns_euphony.h" +#include "common/endian.h" + +TownsEuphonyDriver::TownsEuphonyDriver(Audio::Mixer *mixer) : _activeChannels(0), _sustainChannels(0), + _assignedChannels(0), _paraCount(0), _command(0), _tEnable(0), _tMode(0), _tOrdr(0), _tLevel(0), + _tTranspose(0), _musicPos(0), _musicStart(0), _playing(false), _eventBuffer(0), _bufferedEventsCount(0), + _tempoControlMode(0) { + _para[0] = _para[1] = 0; + _intf = new TownsAudioInterface(mixer, this); + resetTempo(); +} + +TownsEuphonyDriver::~TownsEuphonyDriver() { + delete[] _activeChannels; + delete[] _sustainChannels; + delete[] _assignedChannels; + + delete[] _tEnable; + delete[] _tMode; + delete[] _tOrdr; + delete[] _tLevel; + delete[] _tTranspose; + + delete _intf; +} + +bool TownsEuphonyDriver::init() { + if (!_intf->init()) + return false; + + _activeChannels = new int8[16]; + _sustainChannels = new int8[16]; + _assignedChannels = new ActiveChannel[128]; + _eventBuffer = new DlEvent[64]; + + _tEnable = new uint8[32]; + _tMode = new uint8[32]; + _tOrdr = new uint8[32]; + _tLevel = new int8[32]; + _tTranspose = new int8[32]; + + reset(); + + cdaSetVolume(1, 118, 118); + + return true; +} + +void TownsEuphonyDriver::reset() { + _intf->callback(0); + + _intf->callback(74); + _intf->callback(70); + _intf->callback(75, 3); + + setTimerA(true, 1); + setTimerA(false, 1); + setTimerB(true, 221); + + _paraCount = _command = _para[0] = _para[1] = 0; + memset(_sustainChannels, 0, 16); + memset(_activeChannels, -1, 16); + for (int i = 0; i < 128; i++) { + _assignedChannels[i].chan = _assignedChannels[i].next = -1; + _assignedChannels[i].note = _assignedChannels[i].sub = 0; + } + + int e = 0; + for (int i = 0; i < 6; i++) + assignChannel(i, e++); + for (int i = 0x40; i < 0x48; i++) + assignChannel(i, e++); + + resetTables(); + + memset(_eventBuffer, 0, 64 * sizeof(DlEvent)); + _bufferedEventsCount = 0; + + _playing = _endOfTrack = _suspendParsing = _loop = false; + _elapsedEvents = 0; + _tempoDiff = 0; + + resetTempo(); + + if (_tempoControlMode == 1) { + //if (///) + // return; + setTempoIntern(_defaultTempo); + } else { + setTempoIntern(_defaultTempo); + } + + resetControl(); +} + +void TownsEuphonyDriver::loadInstrument(int chanType, int id, const uint8 *data) { + _intf->callback(5, chanType, id, data); +} + +void TownsEuphonyDriver::loadWaveTable(const uint8 *data) { + _intf->callback(34, data); +} + +void TownsEuphonyDriver::unloadWaveTable(int id) { + _intf->callback(35, id); +} + +void TownsEuphonyDriver::reserveSfxChannels(int num) { + _intf->callback(33, num); +} + +int TownsEuphonyDriver::setMusicTempo(int tempo) { + if (tempo > 250) + return 3; + _defaultTempo = tempo; + _trackTempo = tempo; + setTempoIntern(tempo); + return 0; +} + +int TownsEuphonyDriver::startMusicTrack(const uint8 *data, int trackSize, int startTick) { + if (_playing) + return 2; + + _musicPos = _musicStart = data; + _defaultBaseTickLen = _baseTickLen = startTick; + _musicTrackSize = trackSize; + _timeStampBase = _timeStampDest = 0; + _tickCounter = 0; + _playing = true; + + return 0; +} + +void TownsEuphonyDriver::setMusicLoop(bool loop) { + _loop = loop; +} + +void TownsEuphonyDriver::stopParser() { + if (_playing) { + _playing = false; + _pulseCount = 0; + _endOfTrack = false; + flushEventBuffer(); + resetControl(); + } +} + +void TownsEuphonyDriver::playSoundEffect(int chan, int note, int velo, const uint8 *data) { + _intf->callback(37, chan, note, velo, data); +} + +void TownsEuphonyDriver::stopSoundEffect(int chan) { + _intf->callback(39, chan); +} + +bool TownsEuphonyDriver::soundEffectIsPlaying(int chan) { + return _intf->callback(40, chan) ? true : false; +} + +void TownsEuphonyDriver::chanStereo(int chan, int mode) { + _intf->callback(3, chan, mode); +} + +void TownsEuphonyDriver::chanPitch(int chan, int pitch) { + _intf->callback(7, chan, pitch); +} + +void TownsEuphonyDriver::chanVolume(int chan, int vol) { + _intf->callback(8, chan, vol); +} + +void TownsEuphonyDriver::cdaSetVolume(int a, int vol1, int vol2) { + _intf->callback(67, a, vol1, vol2); +} + +int TownsEuphonyDriver::chanEnable(int tableEntry, int val) { + if (tableEntry > 31) + return 3; + _tEnable[tableEntry] = val; + return 0; +} + +int TownsEuphonyDriver::chanMode(int tableEntry, int val) { + if (tableEntry > 31) + return 3; + _tMode[tableEntry] = val; + return 0; +} + +int TownsEuphonyDriver::chanOrdr(int tableEntry, int val) { + if (tableEntry > 31) + return 3; + if (val < 16) + _tOrdr[tableEntry] = val; + return 0; +} + +int TownsEuphonyDriver::chanLevel(int tableEntry, int val) { + if (tableEntry > 31) + return 3; + if (val <= 40) + _tLevel[tableEntry] = (int8) (val & 0xff); + return 0; +} + +int TownsEuphonyDriver::chanTranspose(int tableEntry, int val) { + if (tableEntry > 31) + return 3; + if (val <= 40) + _tTranspose[tableEntry] = (int8) (val & 0xff); + return 0; +} + +int TownsEuphonyDriver::assignChannel(int chan, int tableEntry) { + if (tableEntry > 15 || chan > 127 || chan < 0) + return 3; + + ActiveChannel *a = &_assignedChannels[chan]; + if (a->chan == tableEntry) + return 0; + + if (a->chan != -1) { + int8 *b = &_activeChannels[a->chan]; + while(*b != chan) { + b = &_assignedChannels[*b].next; + if (*b == -1 && *b != chan) + return 3; + } + + *b = a->next; + + if (a->note) + _intf->callback(2, chan); + + a->chan = a->next = -1; + a->note = 0; + } + + a->next = _activeChannels[tableEntry]; + _activeChannels[tableEntry] = chan; + a->chan = tableEntry; + a->note = a->sub = 0; + + return 0; +} + +void TownsEuphonyDriver::timerCallback(int timerId) { + switch (timerId) { + case 0: + updatePulseCount(); + while (_pulseCount > 0) { + --_pulseCount; + updateTimeStampBase(); + if (!_playing) + continue; + updateEventBuffer(); + updateParser(); + updateCheckEot(); + } + break; + default: + break; + } +} + +void TownsEuphonyDriver::resetTables() { + memset(_tEnable, 0xff, 32); + memset(_tMode, 0xff, 16); + memset(_tMode + 16, 0, 16); + for (int i = 0; i < 32; i++) + _tOrdr[i] = i & 0x0f; + memset(_tLevel, 0, 32); + memset(_tTranspose, 0, 32); +} + +void TownsEuphonyDriver::resetTempo() { + _defaultBaseTickLen = _baseTickLen = 0x33; + _pulseCount = 0; + _extraTimingControlRemainder = 0; + _extraTimingControl = 16; + _tempoModifier = 0; + _timeStampDest = 0; + _deltaTicks = 0; + _tickCounter = 0; + _defaultTempo = 90; + _trackTempo = 90; +} + +void TownsEuphonyDriver::setTempoIntern(int tempo) { + tempo = CLIP(tempo + _tempoModifier, 0, 500); + if (_tempoControlMode == 0) { + _timerSetting = 34750 / (tempo + 30); + _extraTimingControl = 16; + + while (_timerSetting < 126) { + _timerSetting <<= 1; + _extraTimingControl <<= 1; + } + + while (_timerSetting > 383) { + _timerSetting >>= 1; + _extraTimingControl >>= 1; + } + + setTimerA(true, -(_timerSetting - 2)); + + } else if (_tempoControlMode == 1) { + _timerSetting = 312500 / (tempo + 30); + _extraTimingControl = 16; + while (_timerSetting < 1105) { + _timerSetting <<= 1; + _extraTimingControl <<= 1; + } + + } else if (_tempoControlMode == 2) { + _timerSetting = 625000 / (tempo + 30); + _extraTimingControlRemainder = 0; + } +} + +void TownsEuphonyDriver::setTimerA(bool enable, int tempo) { + _intf->callback(21, enable ? 255 : 0, tempo); +} + +void TownsEuphonyDriver::setTimerB(bool enable, int tempo) { + _intf->callback(22, enable ? 255 : 0, tempo); +} + +void TownsEuphonyDriver::updatePulseCount() { + int tc = _extraTimingControl + _extraTimingControlRemainder; + _extraTimingControlRemainder = tc & 0x0f; + tc >>= 4; + _tempoDiff -= tc; + + while (_tempoDiff < 0) { + _elapsedEvents++; + _tempoDiff += 4; + } + + if (_playing && !_suspendParsing) + _pulseCount += tc; +} + +void TownsEuphonyDriver::updateTimeStampBase() { + static const uint16 table[] = { 0x180, 0xC0, 0x80, 0x60, 0x40, 0x30, 0x20, 0x18 }; + if ((uint32)(table[_baseTickLen >> 4] * ((_baseTickLen & 0x0f) + 1)) > ++_tickCounter) + return; + ++_timeStampDest; + _tickCounter = 0; + _deltaTicks = 0; +} + +void TownsEuphonyDriver::updateParser() { + for (bool loop = true; loop; ) { + uint8 cmd = _musicPos[0]; + + if (cmd == 0xff || cmd == 0xf7) { + jumpNextLoop(); + + } else if (cmd < 0x90) { + _endOfTrack = true; + flushEventBuffer(); + loop = false; + + } else if (_timeStampBase > _timeStampDest) { + loop = false; + + } else { + if (_timeStampBase == _timeStampDest) { + uint16 timeStamp = READ_LE_UINT16(&_musicPos[2]); + uint8 l = (timeStamp & 0xff) + (timeStamp & 0xff); + timeStamp = ((timeStamp & 0xff00) | l) >> 1; + if (timeStamp > _tickCounter) + loop = false; + } + + if (loop) { + if (parseNext()) + loop = false; + } + } + } +} + +void TownsEuphonyDriver::updateCheckEot() { + if (!_endOfTrack || _bufferedEventsCount) + return; + stopParser(); +} + +bool TownsEuphonyDriver::parseNext() { +#define OPC(x) &TownsEuphonyDriver::evt##x + static const EuphonyOpcode opcodes[] = { + OPC(NotImpl), + OPC(SetupNote), + OPC(PolyphonicAftertouch), + OPC(ControlPitch), + OPC(InstrumentChanAftertouch), + OPC(InstrumentChanAftertouch), + OPC(ControlPitch) + }; +#undef OPC + + uint cmd = _musicPos[0]; + if (cmd != 0xfe && cmd != 0xfd) { + if (cmd >= 0xf0 ) { + cmd &= 0x0f; + if (cmd == 0) + evtLoadInstrument(); + else if (cmd == 2) + evtAdvanceTimestampOffset(); + else if (cmd == 8) + evtTempo(); + else if (cmd == 12) + evtModeOrdrChange(); + jumpNextLoop(); + return false; + + } else if (!(this->*opcodes[(cmd - 0x80) >> 4])()) { + jumpNextLoop(); + return false; + } + } + + if (cmd == 0xfd) { + _suspendParsing = true; + return true; + } + + if (!_loop) { + _endOfTrack = true; + return true; + } + + _endOfTrack = false; + _musicPos = _musicStart; + _timeStampBase = _timeStampDest = _tickCounter = 0; + _baseTickLen = _defaultBaseTickLen; + + return false; +} + +void TownsEuphonyDriver::jumpNextLoop() { + _musicPos += 6; + if (_musicPos >= _musicStart + _musicTrackSize) + _musicPos = _musicStart; +} + +void TownsEuphonyDriver::updateEventBuffer() { + DlEvent *e = _eventBuffer; + for (int i = _bufferedEventsCount; i; e++) { + if (e->evt == 0) + continue; + if (--e->len) { + --i; + continue; + } + processBufferNote(e->mode, e->evt, e->note, e->velo); + e->evt = 0; + --i; + --_bufferedEventsCount; + } +} + +void TownsEuphonyDriver::flushEventBuffer() { + DlEvent *e = _eventBuffer; + for (int i = _bufferedEventsCount; i; e++) { + if (e->evt == 0) + continue; + processBufferNote(e->mode, e->evt, e->note, e->velo); + e->evt = 0; + --i; + --_bufferedEventsCount; + } +} + +void TownsEuphonyDriver::processBufferNote(int mode, int evt, int note, int velo) { + if (!velo) + evt &= 0x8f; + sendEvent(mode, evt); + sendEvent(mode, note); + sendEvent(mode, velo); +} + +void TownsEuphonyDriver::resetControl() { + for (int i = 0; i < 32; i++) { + if (_tOrdr[i] > 15) { + for (int ii = 0; ii < 16; ii++) + resetControlIntern(_tMode[i], ii); + } else { + resetControlIntern(_tMode[i], _tOrdr[i]); + } + } +} + +void TownsEuphonyDriver::resetControlIntern(int mode, int chan) { + sendEvent(mode, 0xb0 | chan); + sendEvent(mode, 0x40); + sendEvent(mode, 0); + sendEvent(mode, 0xb0 | chan); + sendEvent(mode, 0x7b); + sendEvent(mode, 0); + sendEvent(mode, 0xb0 | chan); + sendEvent(mode, 0x79); + sendEvent(mode, 0x40); +} + +uint8 TownsEuphonyDriver::appendEvent(uint8 evt, uint8 chan) { + if (evt >= 0x80 && evt < 0xf0 && _tOrdr[chan] < 16) + return (evt & 0xf0) | _tOrdr[chan]; + return evt; +} + +void TownsEuphonyDriver::sendEvent(uint8 mode, uint8 command) { + if (mode == 0) { + warning("TownsEuphonyDriver: Mode 0 not implemented."); + + } else if (mode == 0x10) { + warning("TownsEuphonyDriver: Mode 0x10 not implemented."); + + } else if (mode == 0xff) { + if (command >= 0xf0) { + _paraCount = 1; + _command = 0; + } else if (command >= 0x80) { + _paraCount = 1; + _command = command; + } else if (_command >= 0x80) { + switch ((_command - 0x80) >> 4) { + case 0: + if (_paraCount < 2) { + _paraCount++; + _para[0] = command; + } else { + _paraCount = 1; + _para[1] = command; + sendNoteOff(); + } + break; + + case 1: + if (_paraCount < 2) { + _paraCount++; + _para[0] = command; + } else { + _paraCount = 1; + _para[1] = command; + if (command) + sendNoteOn(); + else + sendNoteOff(); + } + break; + + case 2: + if (_paraCount < 2) { + _paraCount++; + _para[0] = command; + } else { + _paraCount = 1; + } + break; + + case 3: + if (_paraCount < 2) { + _paraCount++; + _para[0] = command; + } else { + _paraCount = 1; + _para[1] = command; + + if (_para[0] == 7) + sendChanVolume(); + else if (_para[0] == 10) + sendPanPosition(); + else if (_para[0] == 64) + sendAllNotesOff(); + } + break; + + case 4: + _paraCount = 1; + _para[0] = command; + sendSetInstrument(); + break; + + case 5: + _paraCount = 1; + _para[0] = command; + break; + + case 6: + if (_paraCount < 2) { + _paraCount++; + _para[0] = command; + } else { + _paraCount = 1; + _para[1] = command; + sendPitch(); + } + break; + } + } + } +} + +bool TownsEuphonyDriver::evtSetupNote() { + if (_musicPos[1] > 31) + return false; + if (!_tEnable[_musicPos[1]]) { + jumpNextLoop(); + return (_musicPos[0] == 0xfe || _musicPos[0] == 0xfd) ? true : false; + } + uint8 evt = appendEvent(_musicPos[0], _musicPos[1]); + uint8 mode = _tMode[_musicPos[1]]; + uint8 note = _musicPos[4]; + uint8 velo = _musicPos[5]; + + sendEvent(mode, evt); + sendEvent(mode, prepTranspose(note)); + sendEvent(mode, prepVelo(velo)); + + jumpNextLoop(); + if (_musicPos[0] == 0xfe || _musicPos[0] == 0xfd) + return true; + + velo = _musicPos[5]; + uint16 len = ((((_musicPos[1] << 4) | (_musicPos[2] << 8)) >> 4) & 0xff) | ((((_musicPos[3] << 4) | (_musicPos[4] << 8)) >> 4) << 8); + + int i = 0; + for (; i < 64; i++) { + if (_eventBuffer[i].evt == 0) + break; + } + + if (i == 64) { + processBufferNote(mode, evt, note, velo); + } else { + _eventBuffer[i].evt = evt; + _eventBuffer[i].mode = mode; + _eventBuffer[i].note = note; + _eventBuffer[i].velo = velo; + _eventBuffer[i].len = len ? len : 1; + _bufferedEventsCount++; + } + + return false; +} + +bool TownsEuphonyDriver::evtPolyphonicAftertouch() { + if (_musicPos[1] > 31) + return false; + if (!_tEnable[_musicPos[1]]) + return false; + + uint8 evt = appendEvent(_musicPos[0], _musicPos[1]); + uint8 mode = _tMode[_musicPos[1]]; + + sendEvent(mode, evt); + sendEvent(mode, prepTranspose(_musicPos[4])); + sendEvent(mode, _musicPos[5]); + + return false; +} + +bool TownsEuphonyDriver::evtControlPitch() { + if (_musicPos[1] > 31) + return false; + if (!_tEnable[_musicPos[1]]) + return false; + + uint8 evt = appendEvent(_musicPos[0], _musicPos[1]); + uint8 mode = _tMode[_musicPos[1]]; + + sendEvent(mode, evt); + sendEvent(mode, _musicPos[4]); + sendEvent(mode, _musicPos[5]); + + return false; +} + +bool TownsEuphonyDriver::evtInstrumentChanAftertouch() { + if (_musicPos[1] > 31) + return false; + if (!_tEnable[_musicPos[1]]) + return false; + + uint8 evt = appendEvent(_musicPos[0], _musicPos[1]); + uint8 mode = _tMode[_musicPos[1]]; + + sendEvent(mode, evt); + sendEvent(mode, _musicPos[4]); + + return false; +} + +bool TownsEuphonyDriver::evtLoadInstrument() { + return false; +} + +bool TownsEuphonyDriver::evtAdvanceTimestampOffset() { + ++_timeStampBase; + _baseTickLen = _musicPos[1]; + return false; +} + +bool TownsEuphonyDriver::evtTempo() { + uint8 l = _musicPos[4] << 1; + _trackTempo = (l | (_musicPos[5] << 8)) >> 1; + setTempoIntern(_trackTempo); + return false; +} + +bool TownsEuphonyDriver::evtModeOrdrChange() { + if (_musicPos[1] > 31) + return false; + if (!_tEnable[_musicPos[1]]) + return false; + + if (_musicPos[4] == 1) + _tMode[_musicPos[1]] = _musicPos[5]; + else if (_musicPos[4] == 2) + _tOrdr[_musicPos[1]] = _musicPos[5]; + + return false; +} + +uint8 TownsEuphonyDriver::prepTranspose(uint8 in) { + int out = _tTranspose[_musicPos[1]]; + if (!out) + return in; + out += (in & 0x7f); + + if (out > 127) + out -= 12; + + if (out < 0) + out += 12; + + return out & 0xff; +} + +uint8 TownsEuphonyDriver::prepVelo(uint8 in) { + int out = _tLevel[_musicPos[1]]; + out += (in & 0x7f); + out = CLIP(out, 1, 127); + + return out & 0xff; +} + +void TownsEuphonyDriver::sendNoteOff() { + int8 *chan = &_activeChannels[_command & 0x0f]; + if (*chan == -1) + return; + + while (_assignedChannels[*chan].note != _para[0]) { + chan = &_assignedChannels[*chan].next; + if (*chan == -1) + return; + } + + if (_sustainChannels[_command & 0x0f]) { + _assignedChannels[*chan].note |= 0x80; + } else { + _assignedChannels[*chan].note = 0; + _intf->callback(2, *chan); + } +} + +void TownsEuphonyDriver::sendNoteOn() { + if (!_para[0]) + return; + int8 *chan = &_activeChannels[_command & 0x0f]; + if (*chan == -1) + return; + + do { + _assignedChannels[*chan].sub++; + chan = &_assignedChannels[*chan].next; + } while (*chan != -1); + + chan = &_activeChannels[_command & 0x0f]; + + int d = 0; + int c = 0; + bool found = false; + + do { + if (!_assignedChannels[*chan].note) { + found = true; + break; + } + if (d <= _assignedChannels[*chan].sub) { + c = *chan; + d = _assignedChannels[*chan].sub; + } + chan = &_assignedChannels[*chan].next; + } while (*chan != -1); + + if (found) + c = *chan; + else + _intf->callback(2, c); + + _assignedChannels[c].note = _para[0]; + _assignedChannels[c].sub = 0; + _intf->callback(1, c, _para[0], _para[1]); +} + +void TownsEuphonyDriver::sendChanVolume() { + int8 *chan = &_activeChannels[_command & 0x0f]; + while (*chan != -1) { + _intf->callback(8, *chan, _para[1] & 0x7f); + chan = &_assignedChannels[*chan].next; + }; +} + +void TownsEuphonyDriver::sendPanPosition() { + int8 *chan = &_activeChannels[_command & 0x0f]; + while (*chan != -1) { + _intf->callback(3, *chan, _para[1] & 0x7f); + chan = &_assignedChannels[*chan].next; + }; +} + +void TownsEuphonyDriver::sendAllNotesOff() { + if (_para[1] > 63) { + _sustainChannels[_command & 0x0f] = -1; + return; + } + + _sustainChannels[_command & 0x0f] = 0; + int8 *chan = &_activeChannels[_command & 0x0f]; + while (*chan != -1) { + if (_assignedChannels[*chan].note & 0x80) { + _assignedChannels[*chan].note = 0; + _intf->callback(2, *chan); + } + chan = &_assignedChannels[*chan].next; + }; +} + +void TownsEuphonyDriver::sendSetInstrument() { + int8 *chan = &_activeChannels[_command & 0x0f]; + while (*chan != -1) { + _intf->callback(4, *chan, _para[0]); + _intf->callback(7, *chan, 0); + chan = &_assignedChannels[*chan].next; + }; +} + +void TownsEuphonyDriver::sendPitch() { + int8 *chan = &_activeChannels[_command & 0x0f]; + while (*chan != -1) { + _para[0] += _para[0]; + int16 pitch = (((READ_LE_UINT16(_para)) >> 1) & 0x3fff) - 0x2000; + _intf->callback(7, *chan, pitch); + chan = &_assignedChannels[*chan].next; + }; +} |