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adlib.cpp
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adlib.cpp
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/* 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 "common/debug.h"
#include "common/system.h"
#include "audio/fmopl.h"
#include "audio/mpu401.h"
#include "audio/softsynth/emumidi.h"
namespace Parallaction {
const uint kNumVoices = 9;
// adlib FM voices 0-5
const uint kNumMelodic = 6;
// adlib FM voice 6 and 7-8
const uint kNumPercussion = 5;
// mask for maximum volume level
#define LEVEL_MASK 0x7f
struct OPLOperator {
uint8 characteristic; // amplitude modulation, vibrato, envelope, keyboard scaling, modulator frequency
uint8 levels;
uint8 attackDecay;
uint8 sustainRelease;
uint8 waveform;
};
struct MelodicProgram {
OPLOperator op[2];
uint8 feedbackAlgo;
};
struct PercussionNote {
OPLOperator op[2];
uint8 feedbackAlgo;
uint8 percussion;
uint8 valid;
uint16 frequency;
uint8 octave;
};
static const MelodicProgram melodicPrograms[128] = {
{{{ 0x1, 0x51, 0xf2, 0xb2, 0x0 }, { 0x11, 0x0, 0xf2, 0xa2, 0x0 }}, 0x0 },
{{{ 0xc2, 0x4b, 0xf1, 0x53, 0x0 }, { 0xd2, 0x0, 0xf2, 0x74, 0x0 }}, 0x4 },
{{{ 0x81, 0x9d, 0xf2, 0x74, 0x0 }, { 0x13, 0x0, 0xf2, 0xf1, 0x0 }}, 0x6 },
{{{ 0x3, 0x4f, 0xf1, 0x53, 0x0 }, { 0x17, 0x3, 0xf2, 0x74, 0x0 }}, 0x6 },
{{{ 0xd1, 0x81, 0x81, 0x73, 0x2 }, { 0xd4, 0x0, 0xe1, 0x34, 0x0 }}, 0x3 },
{{{ 0x1, 0x0, 0x94, 0xa6, 0x0 }, { 0x2, 0x0, 0x83, 0x26, 0x0 }}, 0x1 },
{{{ 0xf3, 0x84, 0x81, 0x2, 0x1 }, { 0x55, 0x80, 0xdd, 0x3, 0x0 }}, 0x4 },
{{{ 0x5, 0x8a, 0xf2, 0x26, 0x0 }, { 0x1, 0x80, 0xf3, 0x48, 0x0 }}, 0x0 },
{{{ 0x32, 0x0, 0xb1, 0x14, 0x0 }, { 0x12, 0x0, 0xfd, 0x36, 0x0 }}, 0x3 },
{{{ 0x1, 0x0, 0x82, 0xa, 0x2 }, { 0x2, 0x0, 0x85, 0x15, 0x0 }}, 0x3 },
{{{ 0xd1, 0x1, 0x97, 0xaa, 0x0 }, { 0x4, 0xd, 0xf3, 0xa5, 0x1 }}, 0x9 },
{{{ 0x17, 0x0, 0xf2, 0x62, 0x0 }, { 0x12, 0x0, 0xf2, 0x72, 0x0 }}, 0x8 },
{{{ 0x6, 0x0, 0xff, 0xf4, 0x0 }, { 0xc4, 0x0, 0xf8, 0xb5, 0x0 }}, 0xe },
{{{ 0xc0, 0x81, 0xf2, 0x13, 0x2 }, { 0xc0, 0xc1, 0xf3, 0x14, 0x2 }}, 0xb },
{{{ 0x44, 0x53, 0xf5, 0x31, 0x0 }, { 0x60, 0x80, 0xfd, 0x22, 0x0 }}, 0x6 },
{{{ 0xe0, 0x80, 0xf4, 0xf2, 0x0 }, { 0x61, 0x0, 0xf2, 0x6, 0x0 }}, 0x8 },
{{{ 0xc1, 0x6, 0x83, 0x23, 0x0 }, { 0xc1, 0x4, 0xf0, 0x26, 0x0 }}, 0x1 },
{{{ 0x26, 0x0, 0xf4, 0xb6, 0x0 }, { 0x21, 0x0, 0x81, 0x4b, 0x0 }}, 0x1 },
{{{ 0x24, 0x80, 0xff, 0xf, 0x0 }, { 0x21, 0x80, 0xff, 0xf, 0x0 }}, 0x1 },
{{{ 0x24, 0x4f, 0xf2, 0xb, 0x0 }, { 0x31, 0x0, 0x52, 0xb, 0x0 }}, 0xb },
{{{ 0x31, 0x8, 0x81, 0xb, 0x0 }, { 0xa1, 0x80, 0x92, 0x3b, 0x0 }}, 0x0 },
{{{ 0x70, 0xc5, 0x52, 0x11, 0x1 }, { 0x71, 0x80, 0x31, 0xfe, 0x1 }}, 0x0 },
{{{ 0x51, 0x88, 0x10, 0xf0, 0x0 }, { 0x42, 0x83, 0x40, 0xfc, 0x0 }}, 0x8 },
{{{ 0xf0, 0xd9, 0x81, 0x3, 0x0 }, { 0xb1, 0x80, 0xf1, 0x5, 0x0 }}, 0xa },
{{{ 0x21, 0x4f, 0xf1, 0x31, 0x0 }, { 0x2, 0x80, 0xc3, 0x45, 0x0 }}, 0x0 },
{{{ 0x7, 0x8f, 0x9c, 0x33, 0x1 }, { 0x1, 0x80, 0x8a, 0x13, 0x0 }}, 0x0 },
{{{ 0x21, 0x40, 0xf1, 0x31, 0x0 }, { 0x6, 0x80, 0xf4, 0x44, 0x0 }}, 0x0 },
{{{ 0x21, 0x40, 0xf1, 0x31, 0x3 }, { 0x81, 0x0, 0xf4, 0x44, 0x2 }}, 0x2 },
{{{ 0x11, 0x8d, 0xfd, 0x11, 0x0 }, { 0x11, 0x80, 0xfd, 0x11, 0x0 }}, 0x8 },
{{{ 0xf0, 0x1, 0x97, 0x17, 0x0 }, { 0x21, 0xd, 0xf1, 0x18, 0x0 }}, 0x8 },
{{{ 0xf1, 0x1, 0x97, 0x17, 0x0 }, { 0x21, 0xd, 0xf1, 0x18, 0x0 }}, 0x8 },
{{{ 0xcd, 0x9e, 0x55, 0xd1, 0x0 }, { 0xd1, 0x0, 0xf2, 0x71, 0x0 }}, 0xe },
{{{ 0x1, 0x0, 0xf2, 0x88, 0x0 }, { 0x1, 0x0, 0xf5, 0x88, 0x0 }}, 0x1 },
{{{ 0x30, 0xd, 0xf2, 0xef, 0x0 }, { 0x21, 0x0, 0xf5, 0x78, 0x0 }}, 0x6 },
{{{ 0x0, 0x10, 0xf4, 0xd9, 0x0 }, { 0x0, 0x0, 0xf5, 0xd7, 0x0 }}, 0x4 },
{{{ 0x1, 0x4c, 0xf2, 0x50, 0x0 }, { 0x1, 0x40, 0xd2, 0x59, 0x0 }}, 0x8 },
{{{ 0x20, 0x11, 0xe2, 0x8a, 0x0 }, { 0x20, 0x0, 0xe4, 0xa8, 0x0 }}, 0xa },
{{{ 0x21, 0x40, 0x7b, 0x4, 0x1 }, { 0x21, 0x0, 0x75, 0x72, 0x0 }}, 0x2 },
{{{ 0x31, 0xd, 0xf2, 0xef, 0x0 }, { 0x21, 0x0, 0xf5, 0x78, 0x0 }}, 0xa },
{{{ 0x1, 0xc, 0xf5, 0x2f, 0x1 }, { 0x0, 0x80, 0xf5, 0x5c, 0x0 }}, 0x0 },
{{{ 0xb0, 0x1c, 0x81, 0x3, 0x2 }, { 0x20, 0x0, 0x54, 0x67, 0x2 }}, 0xe },
{{{ 0x1, 0x0, 0xf1, 0x65, 0x0 }, { 0x1, 0x80, 0xa3, 0xa8, 0x2 }}, 0x1 },
{{{ 0xe1, 0x4f, 0xc1, 0xd3, 0x2 }, { 0x21, 0x0, 0x32, 0x74, 0x1 }}, 0x0 },
{{{ 0x2, 0x0, 0xf6, 0x16, 0x0 }, { 0x12, 0x0, 0xf2, 0xf8, 0x0 }}, 0x1 },
{{{ 0xe0, 0x63, 0xf8, 0xf3, 0x0 }, { 0x70, 0x80, 0xf7, 0xf3, 0x0 }}, 0x4 },
{{{ 0x1, 0x6, 0xf3, 0xff, 0x0 }, { 0x8, 0x0, 0xf7, 0xff, 0x0 }}, 0x4 },
{{{ 0x21, 0x16, 0xb0, 0x81, 0x1 }, { 0x22, 0x0, 0xb3, 0x13, 0x1 }}, 0xc },
{{{ 0x1, 0x4f, 0xf0, 0xff, 0x0 }, { 0x30, 0x0, 0x90, 0xf, 0x0 }}, 0x6 },
{{{ 0x0, 0x10, 0xf1, 0xf2, 0x2 }, { 0x1, 0x0, 0xf1, 0xf2, 0x3 }}, 0x0 },
{{{ 0x1, 0x4f, 0xf1, 0x50, 0x0 }, { 0x21, 0x80, 0xa3, 0x5, 0x3 }}, 0x6 },
{{{ 0xb1, 0x3, 0x55, 0x3, 0x0 }, { 0xb1, 0x3, 0x8, 0xa, 0x0 }}, 0x9 },
{{{ 0x22, 0x0, 0xa9, 0x34, 0x1 }, { 0x1, 0x0, 0xa2, 0x42, 0x2 }}, 0x2 },
{{{ 0xa0, 0xdc, 0x81, 0x31, 0x3 }, { 0xb1, 0x80, 0xf1, 0x1, 0x3 }}, 0x0 },
{{{ 0x1, 0x4f, 0xf1, 0x50, 0x0 }, { 0x21, 0x80, 0xa3, 0x5, 0x3 }}, 0x6 },
{{{ 0xf1, 0x80, 0xa0, 0x72, 0x0 }, { 0x74, 0x0, 0x90, 0x22, 0x0 }}, 0x9 },
{{{ 0xe1, 0x13, 0x71, 0xae, 0x0 }, { 0xe1, 0x0, 0xf0, 0xfc, 0x1 }}, 0xa },
{{{ 0x31, 0x1c, 0x41, 0xb, 0x0 }, { 0xa1, 0x80, 0x92, 0x3b, 0x0 }}, 0xe },
{{{ 0x71, 0x1c, 0x41, 0x1f, 0x0 }, { 0xa1, 0x80, 0x92, 0x3b, 0x0 }}, 0xe },
{{{ 0x21, 0x1c, 0x53, 0x1d, 0x0 }, { 0xa1, 0x80, 0x52, 0x3b, 0x0 }}, 0xc },
{{{ 0x21, 0x1d, 0xa4, 0xae, 0x1 }, { 0x21, 0x0, 0xb1, 0x9e, 0x0 }}, 0xc },
{{{ 0xe1, 0x16, 0x71, 0xae, 0x0 }, { 0xe1, 0x0, 0x81, 0x9e, 0x0 }}, 0xa },
{{{ 0xe1, 0x15, 0x71, 0xae, 0x0 }, { 0xe2, 0x0, 0x81, 0x9e, 0x0 }}, 0xe },
{{{ 0x21, 0x16, 0x71, 0xae, 0x0 }, { 0x21, 0x0, 0x81, 0x9e, 0x0 }}, 0xe },
{{{ 0x71, 0x1c, 0x41, 0x1f, 0x0 }, { 0xa1, 0x80, 0x92, 0x3b, 0x0 }}, 0xe },
{{{ 0x21, 0x4f, 0x81, 0x53, 0x0 }, { 0x32, 0x0, 0x22, 0x2c, 0x0 }}, 0xa },
{{{ 0x22, 0x4f, 0x81, 0x53, 0x0 }, { 0x32, 0x0, 0x22, 0x2c, 0x0 }}, 0xa },
{{{ 0x23, 0x4f, 0x81, 0x53, 0x0 }, { 0x34, 0x0, 0x22, 0x2c, 0x0 }}, 0xa },
{{{ 0xe1, 0x16, 0x71, 0xae, 0x0 }, { 0xe1, 0x0, 0x81, 0x9e, 0x0 }}, 0xa },
{{{ 0x71, 0xc5, 0x6e, 0x17, 0x0 }, { 0x22, 0x5, 0x8b, 0xe, 0x0 }}, 0x2 },
{{{ 0xe6, 0x27, 0x70, 0xf, 0x1 }, { 0xe3, 0x0, 0x60, 0x9f, 0x0 }}, 0xa },
{{{ 0x30, 0xc8, 0xd5, 0x19, 0x0 }, { 0xb1, 0x80, 0x61, 0x1b, 0x0 }}, 0xc },
{{{ 0x32, 0x9a, 0x51, 0x1b, 0x0 }, { 0xa1, 0x82, 0xa2, 0x3b, 0x0 }}, 0xc },
{{{ 0xad, 0x3, 0x74, 0x29, 0x0 }, { 0xa2, 0x82, 0x73, 0x29, 0x0 }}, 0x7 },
{{{ 0x21, 0x83, 0x74, 0x17, 0x0 }, { 0x62, 0x8d, 0x65, 0x17, 0x0 }}, 0x7 },
{{{ 0x94, 0xb, 0x85, 0xff, 0x1 }, { 0x13, 0x0, 0x74, 0xff, 0x0 }}, 0xc },
{{{ 0x74, 0x87, 0xa4, 0x2, 0x0 }, { 0xd6, 0x80, 0x45, 0x42, 0x0 }}, 0x2 },
{{{ 0xb3, 0x85, 0x76, 0x21, 0x1 }, { 0x20, 0x0, 0x3d, 0xc1, 0x0 }}, 0x6 },
{{{ 0x17, 0x4f, 0xf2, 0x61, 0x0 }, { 0x12, 0x8, 0xf1, 0xb4, 0x0 }}, 0x8 },
{{{ 0x4f, 0x86, 0x65, 0x1, 0x0 }, { 0x1f, 0x0, 0x32, 0x74, 0x0 }}, 0x4 },
{{{ 0xe1, 0x23, 0x71, 0xae, 0x0 }, { 0xe4, 0x0, 0x82, 0x9e, 0x0 }}, 0xa },
{{{ 0x11, 0x86, 0xf2, 0xbd, 0x0 }, { 0x4, 0x80, 0xa0, 0x9b, 0x1 }}, 0x8 },
{{{ 0x20, 0x90, 0xf5, 0x9e, 0x2 }, { 0x11, 0x0, 0xf4, 0x5b, 0x3 }}, 0xc },
{{{ 0xf0, 0x80, 0x34, 0xe4, 0x0 }, { 0x7e, 0x0, 0xa2, 0x6, 0x0 }}, 0x8 },
{{{ 0x90, 0xf, 0xff, 0x1, 0x3 }, { 0x0, 0x0, 0x1f, 0x1, 0x0 }}, 0xe },
{{{ 0x1, 0x4f, 0xf0, 0xff, 0x0 }, { 0x33, 0x0, 0x90, 0xf, 0x0 }}, 0x6 },
{{{ 0x1e, 0x0, 0x1f, 0xf, 0x0 }, { 0x10, 0x0, 0x1f, 0x7f, 0x0 }}, 0x0 },
{{{ 0xbe, 0x0, 0xf1, 0x1, 0x3 }, { 0x31, 0x0, 0xf1, 0x1, 0x0 }}, 0x4 },
{{{ 0xbe, 0x0, 0xf1, 0x1, 0x3 }, { 0x31, 0x0, 0xf1, 0x1, 0x0 }}, 0x4 },
{{{ 0x93, 0x6, 0xc1, 0x4, 0x1 }, { 0x82, 0x0, 0x51, 0x9, 0x0 }}, 0x6 },
{{{ 0xa0, 0x0, 0x96, 0x33, 0x0 }, { 0x20, 0x0, 0x55, 0x2b, 0x0 }}, 0x6 },
{{{ 0x0, 0xc0, 0xff, 0x5, 0x0 }, { 0x0, 0x0, 0xff, 0x5, 0x3 }}, 0x0 },
{{{ 0x4, 0x8, 0xf8, 0x7, 0x0 }, { 0x1, 0x0, 0x82, 0x74, 0x0 }}, 0x8 },
{{{ 0x0, 0x0, 0x2f, 0x5, 0x0 }, { 0x20, 0x0, 0xff, 0x5, 0x3 }}, 0xa },
{{{ 0x93, 0x0, 0xf7, 0x7, 0x2 }, { 0x0, 0x0, 0xf7, 0x7, 0x0 }}, 0xa },
{{{ 0x0, 0x40, 0x80, 0x7a, 0x0 }, { 0xc4, 0x0, 0xc0, 0x7e, 0x0 }}, 0x8 },
{{{ 0x90, 0x80, 0x55, 0xf5, 0x0 }, { 0x0, 0x0, 0x55, 0xf5, 0x0 }}, 0x8 },
{{{ 0xe1, 0x80, 0x34, 0xe4, 0x0 }, { 0x69, 0x0, 0xf2, 0x6, 0x0 }}, 0x8 },
{{{ 0x3, 0x2, 0xf0, 0xff, 0x3 }, { 0x11, 0x80, 0xf0, 0xff, 0x2 }}, 0x2 },
{{{ 0x1e, 0x0, 0x1f, 0xf, 0x0 }, { 0x10, 0x0, 0x1f, 0x7f, 0x0 }}, 0x0 },
{{{ 0x0, 0x0, 0x2f, 0x1, 0x0 }, { 0x0, 0x0, 0xff, 0x1, 0x0 }}, 0x4 },
{{{ 0xbe, 0x0, 0xf1, 0x1, 0x3 }, { 0x31, 0x0, 0xf1, 0x1, 0x0 }}, 0x4 },
{{{ 0x93, 0x85, 0x3f, 0x6, 0x1 }, { 0x0, 0x0, 0x5f, 0x7, 0x0 }}, 0x6 },
{{{ 0x6, 0x0, 0xa0, 0xf0, 0x0 }, { 0x44, 0x0, 0xc5, 0x75, 0x0 }}, 0xe },
{{{ 0x60, 0x0, 0x10, 0x81, 0x0 }, { 0x20, 0x8c, 0x12, 0x91, 0x0 }}, 0xe },
{{{ 0x1, 0x40, 0xf1, 0x53, 0x0 }, { 0x8, 0x40, 0xf1, 0x53, 0x0 }}, 0x0 },
{{{ 0x31, 0x0, 0x56, 0x31, 0x0 }, { 0x16, 0x0, 0x7d, 0x41, 0x0 }}, 0x0 },
{{{ 0x0, 0x10, 0xf2, 0x72, 0x0 }, { 0x13, 0x0, 0xf2, 0x72, 0x0 }}, 0xc },
{{{ 0x10, 0x0, 0x75, 0x93, 0x1 }, { 0x1, 0x0, 0xf5, 0x82, 0x1 }}, 0x0 },
{{{ 0x0, 0x0, 0xf6, 0xff, 0x2 }, { 0x0, 0x0, 0xf6, 0xff, 0x0 }}, 0x8 },
{{{ 0x30, 0x0, 0xff, 0xa0, 0x3 }, { 0x63, 0x0, 0x65, 0xb, 0x2 }}, 0x0 },
{{{ 0x2a, 0x0, 0xf6, 0x87, 0x0 }, { 0x2b, 0x0, 0x76, 0x25, 0x0 }}, 0x0 },
{{{ 0x85, 0x0, 0xb8, 0x84, 0x0 }, { 0x43, 0x0, 0xe5, 0x8f, 0x0 }}, 0x6 },
{{{ 0x7, 0x4f, 0xf2, 0x60, 0x0 }, { 0x12, 0x0, 0xf2, 0x72, 0x0 }}, 0x8 },
{{{ 0x5, 0x40, 0xb3, 0xd3, 0x0 }, { 0x86, 0x80, 0xf2, 0x24, 0x0 }}, 0x2 },
{{{ 0xd0, 0x0, 0x11, 0xcf, 0x0 }, { 0xd1, 0x0, 0xf4, 0xe8, 0x3 }}, 0x0 },
{{{ 0x5, 0x4e, 0xda, 0x25, 0x2 }, { 0x1, 0x0, 0xf9, 0x15, 0x0 }}, 0xa },
{{{ 0x3, 0x0, 0x8f, 0x7, 0x2 }, { 0x2, 0x0, 0xff, 0x6, 0x0 }}, 0x0 },
{{{ 0x13, 0x0, 0x8f, 0x7, 0x2 }, { 0x2, 0x0, 0xf9, 0x5, 0x0 }}, 0x0 },
{{{ 0xf0, 0x1, 0x97, 0x17, 0x0 }, { 0x21, 0xd, 0xf1, 0x18, 0x0 }}, 0x8 },
{{{ 0xf1, 0x41, 0x11, 0x11, 0x0 }, { 0xf1, 0x41, 0x11, 0x11, 0x0 }}, 0x2 },
{{{ 0x13, 0x0, 0x8f, 0x7, 0x2 }, { 0x2, 0x0, 0xff, 0x6, 0x0 }}, 0x0 },
{{{ 0x1, 0x0, 0x2f, 0x1, 0x0 }, { 0x1, 0x0, 0xaf, 0x1, 0x3 }}, 0xf },
{{{ 0x1, 0x6, 0xf3, 0xff, 0x0 }, { 0x8, 0x0, 0xf7, 0xff, 0x0 }}, 0x4 },
{{{ 0xc0, 0x4f, 0xf1, 0x3, 0x0 }, { 0xbe, 0xc, 0x10, 0x1, 0x0 }}, 0x2 },
{{{ 0x0, 0x2, 0xf0, 0xff, 0x0 }, { 0x11, 0x80, 0xf0, 0xff, 0x0 }}, 0x6 },
{{{ 0x81, 0x47, 0xf1, 0x83, 0x0 }, { 0xa2, 0x4, 0x91, 0x86, 0x0 }}, 0x6 },
{{{ 0xf0, 0xc0, 0xff, 0xff, 0x3 }, { 0xe5, 0x0, 0xfb, 0xf0, 0x0 }}, 0xe },
{{{ 0x0, 0x2, 0xf0, 0xff, 0x0 }, { 0x11, 0x80, 0xf0, 0xff, 0x0 }}, 0x6 }
};
static const PercussionNote percussionNotes[47] = {
{{{ 0x0, 0xb, 0xa8, 0x38, 0x0 }, { 0x0, 0x0, 0xd6, 0x49, 0x0 }}, 0x0, 0x4, 0x1, 0x97, 0x4 },
{{{ 0xc0, 0xc0, 0xf8, 0x3f, 0x2 }, { 0xc0, 0x0, 0xf6, 0x8e, 0x0 }}, 0x0, 0x4, 0x1, 0xf7, 0x4 },
{{{ 0xc0, 0x80, 0xc9, 0xab, 0x0 }, { 0xeb, 0x40, 0xb5, 0xf6, 0x0 }}, 0x1, 0x3, 0x1, 0x6a, 0x6 },
{{{ 0xc, 0x0, 0xd8, 0xa6, 0x0 }, { 0x0, 0x0, 0xd6, 0x4f, 0x0 }}, 0x1, 0x3, 0x1, 0x6c, 0x5 },
{{{ 0x1, 0x0, 0xe2, 0xd2, 0x0 }, { 0x3, 0x41, 0x8f, 0x48, 0x49 }}, 0xc, 0x4, 0x1, 0x2f, 0x5 },
{{{ 0x0, 0x0, 0xc8, 0x58, 0x3 }, { 0x0, 0x0, 0xf6, 0x4f, 0x0 }}, 0x9, 0x3, 0x1, 0x108, 0x4 },
{{{ 0x1, 0x0, 0xff, 0x5, 0x0 }, { 0xf2, 0xff, 0xe0, 0x50, 0x52 }}, 0x5d, 0x2, 0x1, 0x9f, 0x5 },
{{{ 0xe, 0x9, 0xb9, 0x47, 0x0 }, { 0xeb, 0x40, 0xf5, 0xe6, 0x0 }}, 0x0, 0x0, 0x1, 0x82, 0x6 },
{{{ 0x0, 0x0, 0xd6, 0x83, 0x0 }, { 0xd6, 0xd7, 0xe0, 0x41, 0x5e }}, 0x4a, 0x2, 0x1, 0xc7, 0x5 },
{{{ 0x1, 0x9, 0x89, 0x67, 0x0 }, { 0xd6, 0xd7, 0xe0, 0x41, 0x5e }}, 0x4a, 0x0, 0x1, 0x80, 0x6 },
{{{ 0x1, 0x0, 0xd6, 0x96, 0x0 }, { 0xd6, 0xd7, 0xe0, 0x41, 0x5e }}, 0x4a, 0x2, 0x1, 0xed, 0x5 },
{{{ 0x0, 0x9, 0xa9, 0x55, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x1, 0x82, 0x6 },
{{{ 0x2, 0x0, 0xc6, 0x96, 0x0 }, { 0xe0, 0x0, 0xe0, 0x40, 0x0 }}, 0x1, 0x2, 0x1, 0x123, 0x5 },
{{{ 0x5, 0x0, 0xf6, 0x56, 0x0 }, { 0xf7, 0xff, 0xb3, 0x90, 0x4f }}, 0x1, 0x2, 0x1, 0x15b, 0x5 },
{{{ 0x1, 0x0, 0xf7, 0x14, 0x0 }, { 0xf7, 0xff, 0x36, 0x90, 0x79 }}, 0xe7, 0x1, 0x1, 0x1ac, 0x5 },
{{{ 0x0, 0x0, 0xf6, 0x56, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x1, 0x2, 0x1, 0x18b, 0x5 },
{{{ 0x0, 0x83, 0xfb, 0x5, 0x0 }, { 0xf7, 0x41, 0x39, 0x90, 0x79 }}, 0x1, 0x1, 0x1, 0xc8, 0x5 },
{{{ 0x0, 0x0, 0xff, 0x5, 0x0 }, { 0xf7, 0xff, 0x36, 0x90, 0x79 }}, 0xe7, 0x1, 0x1, 0xf9, 0x5 },
{{{ 0x1, 0x0, 0xa0, 0x5, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x2, 0x1, 0x27a, 0x6 },
{{{ 0x0, 0x5, 0xf3, 0x6, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x2, 0x1, 0x108, 0x7 },
{{{ 0x1, 0x0, 0xf9, 0x34, 0x0 }, { 0xf7, 0xff, 0x36, 0x90, 0x79 }}, 0xe7, 0x1, 0x1, 0x147, 0x4 },
{{{ 0x0, 0x0, 0xf7, 0x16, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x2, 0x1, 0x120, 0x6 },
{{{ 0x1, 0x0, 0xff, 0x5, 0x0 }, { 0xf7, 0xff, 0x36, 0x90, 0x79 }}, 0xe7, 0x1, 0x1, 0x42, 0x6 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x1, 0x0, 0xff, 0x5, 0x0 }, { 0xf7, 0xff, 0x36, 0x90, 0x79 }}, 0xe7, 0x1, 0x1, 0x6d, 0x5 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 },
{{{ 0x0, 0x0, 0x0, 0x0, 0x0 }, { 0x0, 0x0, 0x0, 0x0, 0x0 }}, 0x0, 0x0, 0x0, 0x3fc, 0x4 }
};
const uint16 melodicFrequencies[36] = {
0x55, 0x5a, 0x60, 0x66, 0x6c, 0x72, 0x79, 0x80, 0x88,
0x90, 0x99, 0xa1, 0xab, 0xb5, 0xc0, 0xcc, 0xd8, 0xe5,
0xf2, 0x101, 0x110, 0x120, 0x132, 0x143, 0x156, 0x16b, 0x181,
0x198, 0x1b0, 0x1ca, 0x1e5, 0x202, 0x220, 0x241, 0x263, 0x286
};
class AdLibDriver;
class AdLibChannel : public MidiChannel_MPU401 {
public:
void reset();
uint8 _program;
uint8 _volume;
uint8 _pedal;
};
struct MelodicVoice {
bool _used;
uint8 _channel;
uint8 _program;
uint8 _key;
uint32 _timestamp;
uint16 _frequency;
int8 _octave;
};
class AdLibDriver : public MidiDriver_Emulated {
public:
AdLibDriver(Audio::Mixer *mixer) : MidiDriver_Emulated(mixer) {
for (uint i = 0; i < 16; ++i)
_channels[i].init(this, i);
}
int open();
void close();
void send(uint32 b);
MidiChannel *allocateChannel();
MidiChannel *getPercussionChannel() { return &_channels[9]; }
bool isStereo() const { return false; }
int getRate() const { return _mixer->getOutputRate(); }
void generateSamples(int16 *buf, int len);
protected:
OPL::OPL *_opl;
AdLibChannel _channels[16];
MelodicVoice _voices[kNumMelodic];
uint8 _notesPerPercussion[kNumPercussion];
uint _lastVoice;
uint8 _percussionMask;
void noteOff(uint8 channel, uint8 note);
void noteOn(uint8 channel, uint8 note, uint8 velocity);
void allNotesOff();
void setModulationWheel(uint8 channel, uint8 value);
void setFootController(uint8 channel, uint8 value);
void setVolume(uint8 channel, uint8 value);
void setPitchBend(uint8 channel, int16 value);
void playNote(uint8 voice, uint8 octave, uint16 frequency);
void programOperatorSimple(uint8 offset, const OPLOperator &op);
void programOperator(uint8 offset, const OPLOperator &op);
void setOperatorLevel(uint8 offset, const OPLOperator &op, uint8 velocity, uint8 channel, bool forceVolume);
void setupPercussion(const PercussionNote ¬e);
void playPercussion(uint8 channel, const PercussionNote ¬e, uint8 velocity);
void programMelodicVoice(uint8 voice, uint8 program);
void playMelodicNote(uint8 voice, uint8 channel, uint8 note, uint8 velocity);
void muteMelodicVoice(uint8 voice);
void initVoices();
};
MidiDriver *createAdLibDriver() {
return new AdLibDriver(g_system->getMixer());
}
void AdLibChannel::reset() {
_program = 0;
_volume = 127;
_pedal = 0;
}
/*
bit 7 - Clear: AM depth is 1 dB
bit 6 - Clear: Vibrato depth is 7 cent
bit 5 - Set: Rhythm enabled (6 melodic voices)
bit 4 - Bass drum off
bit 3 - Snare drum off
bit 2 - Tom tom off
bit 1 - Cymbal off
bit 0 - Hi Hat off
*/
const uint8 kDefaultPercussionMask = 0x20;
int AdLibDriver::open() {
if (_isOpen)
return MERR_ALREADY_OPEN;
MidiDriver_Emulated::open();
_opl = OPL::Config::create();
_opl->init(getRate());
_opl->writeReg(0x1, 0x20); // set bit 5 (enable all waveforms)
// Reset the OPL registers.
for (uint i = 0; i < kNumVoices; ++i) {
_opl->writeReg(0xA0 + i, 0); // frequency
_opl->writeReg(0xB0 + i, 0); // key on
_opl->writeReg(0xC0 + i, 0); // feedback
}
_opl->writeReg(0xBD, kDefaultPercussionMask);
initVoices();
_mixer->playStream(Audio::Mixer::kMusicSoundType, &_mixerSoundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true);
return 0;
}
void AdLibDriver::close() {
if (!_isOpen)
return;
_isOpen = false;
_mixer->stopHandle(_mixerSoundHandle);
delete _opl;
}
void AdLibDriver::send(uint32 b) {
uint channel = b & 0xf;
uint cmd = (b >> 4) & 0xf;
uint param1 = (b >> 8) & 0xff;
uint param2 = (b >> 16) & 0xff;
switch (cmd) {
case 8:
noteOff(channel, param1);
break;
case 9:
// TODO: map volume?
noteOn(channel, param1, param2);
break;
case 11:
// controller change
switch (param1) {
case 1:
setModulationWheel(channel, param2);
break;
case 4:
setFootController(channel, param2);
break;
case 7:
setVolume(channel, param2);
break;
case 123:
// all notes off
allNotesOff();
break;
}
break;
case 12:
// program change
_channels[channel]._program = param1;
break;
case 14:
setPitchBend(channel, (param1 | (param2 << 7)) - 0x2000);
break;
}
}
void AdLibDriver::noteOff(uint8 channel, uint8 note) {
if (channel == 9) {
if (note < 35 || note > 81)
return;
_percussionMask &= ~(1 << percussionNotes[note - 35].percussion);
_opl->writeReg(0xBD, _percussionMask);
return;
}
for (int i = kNumMelodic - 1; i >= 0; --i) {
if (_voices[i]._channel != channel)
continue;
if (_voices[i]._key != note)
continue;
muteMelodicVoice(i);
_voices[i]._used = false;
return;
}
//debug(1, "failed to find voice off for channel %d, note %d", channel, note);
}
void AdLibDriver::noteOn(uint8 channel, uint8 note, uint8 velocity) {
if (channel == 9) {
if (note < 35 || note > 81)
return;
const PercussionNote &info = percussionNotes[note - 35];
if (!info.valid)
return;
if (note != _notesPerPercussion[info.percussion]) {
setupPercussion(info);
_notesPerPercussion[info.percussion] = note;
}
playPercussion(channel, info, velocity);
return;
}
if (velocity == 0) {
noteOff(channel, note);
return;
}
// We want to play a note on a melodic (voice) channel.
// First, look for a voice playing the same note with the same program.
for (uint i = 0; i < kNumMelodic; ++i) {
if (_voices[i]._channel != channel || _voices[i]._key != note)
continue;
if (_voices[i]._program != _channels[channel]._program)
continue;
muteMelodicVoice(i);
playMelodicNote(i, channel, note, velocity);
return;
}
// The loops below try to start at _lastVoice and find a voice to use.
// They ignore _lastVoice itself, and update _lastVoice if they succeed.
// Then, try finding a melodic voice with the same program.
for (uint i = (_lastVoice + 1) % kNumMelodic; i != _lastVoice; i = (i + 1) % kNumMelodic) {
if (_voices[i]._used)
continue;
if (_voices[i]._program != _channels[channel]._program)
continue;
playMelodicNote(i, channel, note, velocity);
_lastVoice = i;
return;
}
// Then, try finding a free melodic voice of any kind.
for (uint i = (_lastVoice + 1) % kNumMelodic; i != _lastVoice; i = (i + 1) % kNumMelodic) {
if (_voices[i]._used)
continue;
programMelodicVoice(i, _channels[channel]._program);
playMelodicNote(i, channel, note, velocity);
_lastVoice = i;
return;
}
// Then just try finding a melodic voice with the same program,
// and steal it.
for (uint i = (_lastVoice + 1) % kNumMelodic; i != _lastVoice; i = (i + 1) % kNumMelodic) {
if (_voices[i]._program != _channels[channel]._program)
continue;
muteMelodicVoice(i);
playMelodicNote(i, channel, note, velocity);
_lastVoice = i;
return;
}
// Finally, just take control of the channel used least recently.
uint voiceId = 0;
uint32 bestTimestamp = 0xffffffff;
for (uint i = 0; i < kNumMelodic; ++i)
if (bestTimestamp > _voices[i]._timestamp) {
voiceId = i;
bestTimestamp = _voices[i]._timestamp;
}
//debug(1, "ran out of voices for channel %d, note %d, program %d: reused voice %d", channel, note, _channels[channel]._program, voiceId);
programMelodicVoice(voiceId, _channels[channel]._program);
playMelodicNote(voiceId, channel, note, velocity);
_lastVoice = voiceId;
}
// TODO: this doesn't match original
void AdLibDriver::allNotesOff() {
for (uint i = 0; i < kNumMelodic; ++i) {
muteMelodicVoice(i);
_voices[i]._used = false;
}
_percussionMask = kDefaultPercussionMask;
_opl->writeReg(0xBD, kDefaultPercussionMask);
}
void AdLibDriver::setModulationWheel(uint8 channel, uint8 value) {
if (value >= 64)
_percussionMask |= 0x80;
else
_percussionMask &= 0x7f;
_opl->writeReg(0xBD, _percussionMask);
}
void AdLibDriver::setFootController(uint8 channel, uint8 value) {
_channels[channel]._pedal = (value >= 64);
}
void AdLibDriver::setVolume(uint8 channel, uint8 value) {
_channels[channel]._volume = value;
}
void AdLibDriver::setPitchBend(uint8 channel, int16 value) {
for (uint i = 0; i < kNumMelodic; ++i) {
if (_voices[i]._channel != channel || !_voices[i]._used)
continue;
// index into frequency table
uint f = 12 + (_voices[i]._key % 12);
int16 bendAmount = value;
if (bendAmount > 0) {
// bend up two semitones
bendAmount *= (melodicFrequencies[f + 2] - melodicFrequencies[f]);
} else {
// bend down two semitones
bendAmount *= (melodicFrequencies[f] - melodicFrequencies[f - 2]);
}
bendAmount /= 0x2000;
bendAmount += melodicFrequencies[f]; // add the base frequency
playNote(i, _voices[i]._octave, bendAmount);
_voices[i]._timestamp = g_system->getMillis();
}
}
void AdLibDriver::playNote(uint8 voice, uint8 octave, uint16 frequency) {
/* Percussions are always fed keyOn = 0 even to set the note, as they are activated using the
BD register instead. I wonder if they can just be fed the same value as melodic voice and
be done with it. */
uint8 keyOn = (voice < kNumMelodic) ? 0x20 : 0;
// key on, octave, high 2 bits of frequency
_opl->writeReg(0xB0 + voice, keyOn | ((octave & 7) << 2) | ((frequency >> 8) & 3));
// low 8 bits of frequency
_opl->writeReg(0xA0 + voice, frequency & 0xff);
}
void AdLibDriver::programOperatorSimple(uint8 offset, const OPLOperator &op) {
_opl->writeReg(0x40 + offset, op.levels & LEVEL_MASK);
_opl->writeReg(0x60 + offset, op.attackDecay);
_opl->writeReg(0x80 + offset, op.sustainRelease);
}
void AdLibDriver::programOperator(uint8 offset, const OPLOperator &op) {
_opl->writeReg(0x20 + offset, op.characteristic);
_opl->writeReg(0x60 + offset, op.attackDecay);
_opl->writeReg(0x80 + offset, op.sustainRelease);
_opl->writeReg(0xE0 + offset, op.waveform);
_opl->writeReg(0x40 + offset, op.levels);
}
const uint16 adlibLogVolume[] = {
0, 37, 58, 73, 85, 95, 103, 110, 116, 121, 127, 131, 135, 139, 143, 146,
149, 153, 155, 158, 161, 163, 165, 168, 170, 172, 174, 176, 178, 179, 181, 183,
184, 186, 188, 189, 191, 192, 193, 195, 196, 197, 198, 200, 201, 202, 203, 204,
205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 219,
220, 221, 222, 223, 223, 224, 225, 226, 226, 227, 228, 228, 229, 230, 231, 231,
232, 233, 233, 234, 234, 235, 236, 236, 237, 237, 238, 239, 239, 240, 240, 241,
241, 242, 242, 243, 244, 244, 245, 245, 246, 246, 247, 247, 248, 248, 248, 249,
249, 250, 250, 251, 251, 252, 252, 253, 253, 253, 254, 254, 255, 255, 256, 256,
256
};
void AdLibDriver::setOperatorLevel(uint8 offset, const OPLOperator &op, uint8 velocity, uint8 channel, bool forceVolume) {
uint8 programLevel = LEVEL_MASK;
if (!forceVolume)
programLevel -= (op.levels & LEVEL_MASK);
uint32 noteLevel = adlibLogVolume[velocity];
uint32 channelLevel = adlibLogVolume[_channels[channel]._volume];
// programLevel comes from the static data and is probably already in the correct logarithmic scale
uint32 finalLevel = LEVEL_MASK - ((noteLevel * channelLevel * programLevel) >> 16);
// high 2 bits are scaling level, the rest is (inversed) volume
_opl->writeReg(0x40 + offset, (op.levels & 0xc0) | (finalLevel & 0x3f));
}
const uint8 operatorOffsetsForPercussion[] = {
0x11, // hi-hat
0x15, // cymbal
0x12, // tom tom
0x14 // snare drum
};
void AdLibDriver::setupPercussion(const PercussionNote ¬e) {
if (note.percussion < 4) {
// simple percussion (1 operator)
// turn off relevant percussion
_percussionMask &= ~(1 << note.percussion);
_opl->writeReg(0xBD, _percussionMask);
programOperatorSimple(operatorOffsetsForPercussion[note.percussion], note.op[0]);
return;
}
// bass drum (2 operators)
// turn off bass drum
_percussionMask &= ~(0x10);
_opl->writeReg(0xBD, _percussionMask);
programOperator(0x10, note.op[0]);
programOperator(0x13, note.op[1]);
_opl->writeReg(0xC0 + 6, note.feedbackAlgo);
}
void AdLibDriver::playPercussion(uint8 channel, const PercussionNote ¬e, uint8 velocity) {
if (note.percussion < 4) {
// simple percussion (1 operator)
// turn off relevant percussion
_percussionMask &= ~(1 << note.percussion);
_opl->writeReg(0xBD, _percussionMask);
setOperatorLevel(operatorOffsetsForPercussion[note.percussion], note.op[0], velocity, channel, true);
if (note.percussion == 2) {
// tom tom
playNote(8, note.octave, note.frequency);
} else if (note.percussion == 3) {
// snare drum
playNote(7, note.octave, note.frequency);
}
// turn on relevant percussion
_percussionMask |= (1 << note.percussion);
_opl->writeReg(0xBD, _percussionMask);
return;
}
// turn off bass drum
_percussionMask &= ~(0x10);
_opl->writeReg(0xBD, _percussionMask);
if (note.feedbackAlgo & 1) {
// operators 1 and 2 in additive synthesis
setOperatorLevel(0x10, note.op[0], velocity, channel, true);
setOperatorLevel(0x13, note.op[1], velocity, channel, true);
} else {
// operator 2 is modulating operator 1
setOperatorLevel(0x13, note.op[1], velocity, channel, true);
}
playNote(6, note.octave, note.frequency);
// turn on bass drum
_percussionMask |= 0x10;
_opl->writeReg(0xBD, _percussionMask);
}
const uint8 offset1ForMelodic[kNumVoices] = { 0x0, 0x1, 0x2, 0x8, 0x9, 0xa, 0x10, 0x11, 0x12 };
const uint8 offset2ForMelodic[kNumVoices] = { 0x3, 0x4, 0x5, 0xb, 0xc, 0xd, 0x13, 0x14, 0x15 };
void AdLibDriver::programMelodicVoice(uint8 voice, uint8 program) {
assert(program < 128);
assert(voice < kNumMelodic);
const MelodicProgram &info = melodicPrograms[program];
uint8 offset1 = offset1ForMelodic[voice];
uint8 offset2 = offset2ForMelodic[voice];
// Start at lowest volume.
_opl->writeReg(0x40 + offset1, LEVEL_MASK);
_opl->writeReg(0x40 + offset2, LEVEL_MASK);
muteMelodicVoice(voice);
programOperator(offset1, info.op[0]);
programOperator(offset2, info.op[1]);
_opl->writeReg(0xC0 + voice, info.feedbackAlgo);
}
void AdLibDriver::playMelodicNote(uint8 voice, uint8 channel, uint8 note, uint8 velocity) {
assert(voice < kNumMelodic);
uint8 octave = note / 12;
uint8 f = 12 + (note % 12);
if (octave > 7)
octave = 7;
const MelodicProgram &info = melodicPrograms[_channels[channel]._program];
uint8 offset1 = offset1ForMelodic[voice];
uint8 offset2 = offset2ForMelodic[voice];
if (info.feedbackAlgo & 1) {
setOperatorLevel(offset1, info.op[0], velocity, channel, false);
setOperatorLevel(offset2, info.op[1], velocity, channel, false);
} else {
setOperatorLevel(offset2, info.op[1], velocity, channel, true);
}
playNote(voice, octave, melodicFrequencies[f]);
_voices[voice]._program = _channels[channel]._program;
_voices[voice]._key = note;
_voices[voice]._channel = channel;
_voices[voice]._timestamp = g_system->getMillis();
_voices[voice]._frequency = melodicFrequencies[f];
_voices[voice]._octave = octave;
_voices[voice]._used = true;
}
void AdLibDriver::muteMelodicVoice(uint8 voice) {
_opl->writeReg(0xB0 + voice, 0 | ((_voices[voice]._octave & 7) << 2) | ((_voices[voice]._frequency >> 8) & 3));
}
MidiChannel *AdLibDriver::allocateChannel() {
for (uint i = 0; i < 16; ++i) {
if (i == 9)
continue;
if (_channels[i].allocate())
return &_channels[i];
}
return NULL;
}
void AdLibDriver::generateSamples(int16 *buf, int len) {
memset(buf, 0, sizeof(int16) * len);
_opl->readBuffer(buf, len);
}
void AdLibDriver::initVoices() {
_percussionMask = kDefaultPercussionMask;
_opl->writeReg(0xBD, _percussionMask);
for (uint i = 0; i < 16; ++i)
_channels[i].reset();
for (uint i = 0; i < kNumMelodic; ++i) {
_voices[i]._key = 0xff;
_voices[i]._program = 0xff;
_voices[i]._channel = 0xff;
_voices[i]._timestamp = 0;
_voices[i]._frequency = 0;
_voices[i]._octave = 0;
_voices[i]._used = false;
}
for (uint i = 0; i < kNumPercussion; ++i)
_notesPerPercussion[i] = 0xff;
_lastVoice = 0;
}
} // namespace Parallaction