mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 04:34:50 +00:00
98545ad4e5
- some minor changes to detection code - added missing spanish strings to IGOR.TBL - fixed '@' charset index svn-id: r29672
363 lines
10 KiB
C++
363 lines
10 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "igor/igor.h"
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#include "igor/midi.h"
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namespace Igor {
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MidiParser_CTMF::MidiParser_CTMF()
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: _instrumentsCount(0) {
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memset(_instruments, 0, sizeof(_instruments));
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}
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void MidiParser_CTMF::decodeHeader(const uint8 *p) {
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_instrumentsDataOffset = READ_LE_UINT16(p); p += 2;
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_midiDataOffset = READ_LE_UINT16(p); p += 2;
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_ticksPerQuarter = READ_LE_UINT16(p); p += 2;
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_ticksPerSecond = READ_LE_UINT16(p); p += 2;
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p += 22;
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_instrumentsCount = READ_LE_UINT16(p); p += 2;
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_basicTempo = READ_LE_UINT16(p); p += 2;
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}
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void MidiParser_CTMF::decodeAdlibInstrument(struct AdlibInstrument *ins, const uint8 *p) {
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ins->chr[kAdlibCarrier] = p[0];
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ins->chr[kAdlibModulator] = p[1];
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ins->scale[kAdlibCarrier] = p[2];
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ins->scale[kAdlibModulator] = p[3];
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ins->attack[kAdlibCarrier] = p[4];
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ins->attack[kAdlibModulator] = p[5];
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ins->sustain[kAdlibCarrier] = p[6];
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ins->sustain[kAdlibModulator] = p[7];
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ins->waveSel[kAdlibCarrier] = p[8];
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ins->waveSel[kAdlibModulator] = p[9];
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ins->feedback = p[10];
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}
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bool MidiParser_CTMF::loadMusic(byte *data, uint32 size) {
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if (memcmp(data, "CTMF", 4) == 0 && READ_LE_UINT16(data + 4) == 0x101) {
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decodeHeader(data + 6);
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assert(_instrumentsCount <= kMaxInstruments);
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for (int i = 0; i < _instrumentsCount; ++i) {
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decodeAdlibInstrument(&_instruments[i], data + _instrumentsDataOffset + i * 16);
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}
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// reset parser
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_num_tracks = 1;
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_tracks[0] = data + _midiDataOffset;
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_ppqn = _ticksPerQuarter;
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setTempo(500000);
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setTrack(0);
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return true;
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}
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return false;
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}
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void MidiParser_CTMF::parseNextEvent(EventInfo &info) {
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info.start = _position._play_pos;
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info.delta = readVLQ(_position._play_pos);
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if ((_position._play_pos[0] & 0xF0) >= 0x80) {
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info.event = *_position._play_pos++;
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} else {
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info.event = _position._running_status;
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}
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if ((info.event & 0x80) == 0) {
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return;
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}
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_position._running_status = info.event;
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switch (info.command()) {
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case 0x8: // Note Off
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case 0x9: // Note On
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case 0xB: // Control Mode Change
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info.basic.param1 = *_position._play_pos++;
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info.basic.param2 = *_position._play_pos++;
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if (info.command() == 0x9 && info.basic.param2 == 0) {
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info.event = info.channel() | 0x80; // Note Off
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}
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return;
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case 0xC: // Program Change
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info.basic.param1 = *(_position._play_pos++);
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info.basic.param2 = 0;
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return;
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case 0xF:
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switch (info.event & 15) {
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case 0xF:
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info.ext.type = *(_position._play_pos++);
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info.length = readVLQ(_position._play_pos);
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info.ext.data = _position._play_pos;
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_position._play_pos += info.length;
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return;
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}
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}
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warning("MidiParser_CTMF::parseNextEvent: Unhandled event code %x", info.event);
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}
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int AdlibMidiDriver::open() {
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MidiDriver_Emulated::open();
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_opl = makeAdlibOPL(getRate());
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memset(_adlibData, 0, sizeof(_adlibData));
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_adlibRhythmMode = false;
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for (int i = 0; i < kAdlibChannelsCount; ++i) {
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_adlibChannels[i].ch = -1;
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_adlibChannels[i].lt = _adlibChannels[i].note = 0;
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}
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memset(_adlibInstrumentsMappingTable, 0, sizeof(_adlibInstrumentsMappingTable));
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adlibSetupCard();
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_mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_mixerSoundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, false, true);
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return 0;
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}
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void AdlibMidiDriver::close() {
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_mixer->stopHandle(_mixerSoundHandle);
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OPLDestroy(_opl);
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}
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void AdlibMidiDriver::send(uint32 b) {
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int channel = b & 15;
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int cmd = (b >> 4) & 7;
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int param1 = (b >> 8) & 255;
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int param2 = (b >> 16) & 255;
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switch (cmd) {
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case 0:
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adlibTurnNoteOff(channel, param1);
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break;
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case 1:
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adlibTurnNoteOn(channel, param1, param2);
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break;
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case 3:
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adlibControlChange(channel, param1, param2);
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break;
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case 4:
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adlibProgramChange(channel, param1);
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break;
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default:
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warning("Unhandled cmd %d channel %d (0x%X)", cmd, channel, b);
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break;
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}
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}
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void AdlibMidiDriver::generateSamples(int16 *data, int len) {
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memset(data, 0, sizeof(int16) * len);
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YM3812UpdateOne(_opl, data, len);
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}
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void AdlibMidiDriver::adlibWrite(int port, int value) {
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OPLWriteReg(_opl, port, value);
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_adlibData[port & 255] = value & 255;
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}
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void AdlibMidiDriver::adlibSetupCard() {
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for (int i = 0; i < 256; ++i) {
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adlibWrite(i, 0);
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}
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adlibWrite(1, 0x20);
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adlibWrite(0xBD, 0xC0);
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}
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void AdlibMidiDriver::adlibTurnNoteOff(int channel, int note) {
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for (int i = 0; i < kAdlibChannelsCount; ++i) {
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if (_adlibChannels[i].ch == channel && _adlibChannels[i].note == note) {
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adlibEndNote(i);
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_adlibChannels[i].ch = -1;
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}
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}
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}
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void AdlibMidiDriver::adlibTurnNoteOn(int channel, int note, int velocity) {
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assert(velocity != 0);
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for (int i = 0; i < kAdlibChannelsCount; ++i) {
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if (_adlibChannels[i].ch != -1) {
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++_adlibChannels[i].lt;
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}
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}
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int ch = -1;
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if (!_adlibRhythmMode || channel < 11) {
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int maxLt = -1;
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int maxCh = -1;
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for (int i = 0; i < (_adlibRhythmMode ? 6 : 9); ++i) {
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if (_adlibChannels[i].ch == -1) {
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ch = i;
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break;
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}
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if (_adlibChannels[i].lt > maxLt) {
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maxLt = _adlibChannels[i].lt;
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maxCh = i;
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}
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}
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if (ch == -1) {
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assert(maxCh != -1);
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ch = maxCh;
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adlibEndNote(ch);
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}
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} else {
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ch = _adlibPercussionsMappingTable[channel - 11];
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}
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const AdlibInstrument &ins = _adlibInstruments[_adlibInstrumentsMappingTable[channel]];
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if (!_adlibRhythmMode || channel < 12) {
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adlibSetupInstrument(ch, ins);
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} else {
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adlibSetupPercussion(channel, ins);
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}
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adlibSetupNote(ch, note - 13, velocity);
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_adlibChannels[ch].ch = channel;
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_adlibChannels[ch].note = note;
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_adlibChannels[ch].lt = 0;
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}
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void AdlibMidiDriver::adlibSetupInstrument(int channel, const AdlibInstrument &ins) {
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adlibWrite(0x20 + _adlibOperatorsTable[channel], ins.chr[kAdlibCarrier]);
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adlibWrite(0x23 + _adlibOperatorsTable[channel], ins.chr[kAdlibModulator]);
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adlibWrite(0x40 + _adlibOperatorsTable[channel], ins.scale[kAdlibCarrier]);
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if ((ins.feedback & 1) == 0) {
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adlibWrite(0x43 + _adlibOperatorsTable[channel], ins.scale[kAdlibModulator]);
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} else {
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adlibWrite(0x43 + _adlibOperatorsTable[channel], 0);
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}
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adlibWrite(0x60 + _adlibOperatorsTable[channel], ins.attack[kAdlibCarrier]);
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adlibWrite(0x63 + _adlibOperatorsTable[channel], ins.attack[kAdlibModulator]);
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adlibWrite(0x80 + _adlibOperatorsTable[channel], ins.sustain[kAdlibCarrier]);
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adlibWrite(0x83 + _adlibOperatorsTable[channel], ins.sustain[kAdlibModulator]);
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adlibWrite(0xE0 + _adlibOperatorsTable[channel], ins.waveSel[kAdlibCarrier]);
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adlibWrite(0xE3 + _adlibOperatorsTable[channel], ins.waveSel[kAdlibModulator]);
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adlibWrite(0xC0 + channel, ins.feedback);
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}
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void AdlibMidiDriver::adlibSetupPercussion(int channel, const AdlibInstrument &ins) {
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channel = _adlibChannelsMappingTable[channel - 12];
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adlibWrite(0x20 + channel, ins.chr[kAdlibCarrier]);
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adlibWrite(0x40 + channel, ins.scale[kAdlibCarrier]);
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adlibWrite(0x60 + channel, ins.attack[kAdlibCarrier]);
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adlibWrite(0x80 + channel, ins.sustain[kAdlibCarrier]);
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adlibWrite(0xE0 + channel, ins.waveSel[kAdlibCarrier]);
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adlibWrite(0xC0 + channel, ins.feedback);
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}
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void AdlibMidiDriver::adlibSetupNote(int channel, int note, int velocity) {
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adlibSetVolume(channel, velocity);
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int f = _adlibNoteFreqTable[note % 12];
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adlibWrite(0xA0 + channel, f);
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int oct = note / 12;
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int c = ((f & 0x300) >> 8) + (oct << 2);
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if (!_adlibRhythmMode || channel < 6) {
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c |= 0x20;
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}
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adlibWrite(0xB0 + channel, c);
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}
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void AdlibMidiDriver::adlibEndNote(int channel) {
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adlibWrite(0xB0 + channel, _adlibData[0xB0 + channel] & ~0x20);
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}
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void AdlibMidiDriver::adlibSetVolume(int channel, int volume) {
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volume = 63 - (volume >> 1);
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if ((_adlibData[0xC0 + channel] & 1) == 1) {
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adlibWrite(0x40 + _adlibOperatorsTable[channel], volume | (_adlibData[0x40 + _adlibOperatorsTable[channel]] & 0xC0));
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}
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adlibWrite(0x43 + _adlibOperatorsTable[channel], volume | (_adlibData[0x43 + _adlibOperatorsTable[channel]] & 0xC0));
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}
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void AdlibMidiDriver::adlibControlChange(int channel, int control, int param) {
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switch (control) {
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case 0x67:
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_adlibRhythmMode = param != 0;
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if (_adlibRhythmMode) {
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adlibWrite(0xBD, _adlibData[0xBD] | 0x20);
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} else {
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adlibWrite(0xBD, _adlibData[0xBD] & ~0x20);
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}
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break;
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case 0x7B:
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adlibTurnNoteOff(channel, -1);
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break;
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default:
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warning("Unhandled adlibControlChange 0x%X %d", control, param);
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break;
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}
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}
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void AdlibMidiDriver::adlibProgramChange(int channel, int num) {
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_adlibInstrumentsMappingTable[channel] = num;
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}
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const uint8 AdlibMidiDriver::_adlibOperatorsTable[] = { 0, 1, 2, 8, 9, 10, 16, 17, 18 };
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const uint8 AdlibMidiDriver::_adlibChannelsMappingTable[] = { 20, 18, 21, 17 };
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const int16 AdlibMidiDriver::_adlibNoteFreqTable[] = { 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 686 };
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const uint8 AdlibMidiDriver::_adlibPercussionsMappingTable[] = { 6, 7, 8, 8, 7 };
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MidiPlayer::MidiPlayer(IgorEngine *vm) : _isPlaying(false) {
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_driver = new AdlibMidiDriver(vm->_mixer);
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_driver->open();
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_parser = new MidiParser_CTMF;
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_parser->setMidiDriver(_driver);
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_parser->setTimerRate(_driver->getBaseTempo());
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_driver->setTimerCallback(this, &MidiPlayer::updateTimerCallback);
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}
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MidiPlayer::~MidiPlayer() {
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stopMusic();
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_driver->setTimerCallback(0, 0);
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_driver->close();
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delete _parser;
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delete _driver;
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}
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void MidiPlayer::playMusic(uint8 *data, uint32 size) {
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stopMusic();
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_mutex.lock();
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_isPlaying = true;
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_parser->loadMusic(data, size);
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_parser->setTrack(0);
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_driver->setInstruments(&_parser->_instruments[0]);
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_mutex.unlock();
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}
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void MidiPlayer::stopMusic() {
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_mutex.lock();
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if (_isPlaying) {
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_isPlaying = false;
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_parser->unloadMusic();
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}
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_mutex.unlock();
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}
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void MidiPlayer::updateTimer() {
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_mutex.lock();
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if (_isPlaying) {
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_parser->onTimer();
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}
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_mutex.unlock();
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}
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} // namespace Igor
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