ref: e25368ca6b377eb8dd72134f85bdc42c066ac547
parent: 5e162ed7e3bb7cc35446eb17aee247890b2c9909
author: nukeykt <alexeytf2@icloud.com>
date: Thu Feb 11 15:49:48 EST 2016
opl:Nuked OPL emulator
--- a/opl/Makefile.am
+++ b/opl/Makefile.am
@@ -15,5 +15,6 @@
opl_timer.c opl_timer.h \
opl_win32.c \
ioperm_sys.c ioperm_sys.h \
- dbopl.c dbopl.h
+ dbopl.c dbopl.h \
+ opl3.c opl3.h
--- a/opl/dbopl.h
+++ b/opl/dbopl.h
@@ -13,6 +13,7 @@
*/
#include <inttypes.h>
+#include "opl.h"
//Use 8 handlers based on a small logatirmic wavetabe and an exponential table for volume
#define WAVE_HANDLER 10
@@ -27,15 +28,6 @@
typedef struct _Chip Chip;
typedef struct _Operator Operator;
typedef struct _Channel Channel;
-
-typedef uintptr_t Bitu;
-typedef intptr_t Bits;
-typedef uint32_t Bit32u;
-typedef int32_t Bit32s;
-typedef uint16_t Bit16u;
-typedef int16_t Bit16s;
-typedef uint8_t Bit8u;
-typedef int8_t Bit8s;
#if (DBOPL_WAVE == WAVE_HANDLER)
typedef Bits ( DB_FASTCALL *WaveHandler) ( Bitu i, Bitu volume );
--- a/opl/opl.c
+++ b/opl/opl.c
@@ -57,6 +57,7 @@
static int init_stage_reg_writes = 1;
unsigned int opl_sample_rate = 22050;
+opl_core_t opl_emu = OPL_CORE_NUKED;
//
// Init/shutdown code.
@@ -179,9 +180,10 @@
// Set the sample rate used for software OPL emulation.
-void OPL_SetSampleRate(unsigned int rate)
+void OPL_SetSampleRateAndCore(unsigned int rate, opl_core_t core)
{opl_sample_rate = rate;
+ opl_emu = core;
}
void OPL_WritePort(opl_port_t port, unsigned int value)
--- a/opl/opl.h
+++ b/opl/opl.h
@@ -21,6 +21,15 @@
#include <inttypes.h>
+typedef uintptr_t Bitu;
+typedef intptr_t Bits;
+typedef uint32_t Bit32u;
+typedef int32_t Bit32s;
+typedef uint16_t Bit16u;
+typedef int16_t Bit16s;
+typedef uint8_t Bit8u;
+typedef int8_t Bit8s;
+
typedef void (*opl_callback_t)(void *data);
// Result from OPL_Init(), indicating what type of OPL chip was detected,
@@ -39,6 +48,12 @@
OPL_REGISTER_PORT_OPL3 = 2
} opl_port_t;
+typedef enum
+{+ OPL_CORE_NUKED,
+ OPL_CORE_DBOPL
+} opl_core_t;
+
#define OPL_NUM_OPERATORS 21
#define OPL_NUM_VOICES 9
@@ -81,9 +96,9 @@
void OPL_Shutdown(void);
-// Set the sample rate used for software emulation.
+// Set the sample rate and the core used for software emulation.
-void OPL_SetSampleRate(unsigned int rate);
+void OPL_SetSampleRateAndCore(unsigned int rate, opl_core_t core);
// Write to one of the OPL I/O ports:
--- /dev/null
+++ b/opl/opl3.c
@@ -1,0 +1,1152 @@
+//
+// Copyright (C) 2013-2016 Alexey Khokholov (Nuke.YKT)
+//
+// 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.
+//
+//
+// Nuked OPL3 emulator.
+// Thanks:
+// MAME Development Team(Jarek Burczynski, Tatsuyuki Satoh):
+// Feedback and Rhythm part calculation information.
+// forums.submarine.org.uk(carbon14, opl3):
+// Tremolo and phase generator calculation information.
+// OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
+// OPL2 ROMs.
+//
+// version: 1.6.2
+//
+// Changelog:
+//
+// v1.1:
+// Vibrato's sign fix.
+// v1.2:
+// Operator key fix.
+// Corrected 4-operator mode.
+// Corrected rhythm mode.
+// Some small fixes.
+// v1.2.1:
+// Small envelope generator fix.
+// Removed EX_Get function(not used)
+// v1.3:
+// Complete rewrite.
+// v1.4:
+// New envelope and waveform generator.
+// Some small fixes.
+// v1.4.1:
+// Envelope generator rate calculation fix.
+// v1.4.2:
+// Version for ZDoom.
+// v1.5:
+// Optimizations.
+// v1.6:
+// Improved emulation output.
+// v1.6.1:
+// Simple YMF289(OPL3-L) emulation.
+// v1.6.2:
+// Version for Chocolate Doom.
+//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "opl3.h"
+
+#define RSM_FRAC 10
+
+// Channel types
+
+enum {+ ch_2op = 0,
+ ch_4op = 1,
+ ch_4op2 = 2,
+ ch_drum = 3
+};
+
+// Envelope key types
+
+enum {+ egk_norm = 0x01,
+ egk_drum = 0x02
+};
+
+
+//
+// logsin table
+//
+
+static const Bit16u logsinrom[256] = {+ 0x859, 0x6c3, 0x607, 0x58b, 0x52e, 0x4e4, 0x4a6, 0x471, 0x443, 0x41a, 0x3f5, 0x3d3, 0x3b5, 0x398, 0x37e, 0x365,
+ 0x34e, 0x339, 0x324, 0x311, 0x2ff, 0x2ed, 0x2dc, 0x2cd, 0x2bd, 0x2af, 0x2a0, 0x293, 0x286, 0x279, 0x26d, 0x261,
+ 0x256, 0x24b, 0x240, 0x236, 0x22c, 0x222, 0x218, 0x20f, 0x206, 0x1fd, 0x1f5, 0x1ec, 0x1e4, 0x1dc, 0x1d4, 0x1cd,
+ 0x1c5, 0x1be, 0x1b7, 0x1b0, 0x1a9, 0x1a2, 0x19b, 0x195, 0x18f, 0x188, 0x182, 0x17c, 0x177, 0x171, 0x16b, 0x166,
+ 0x160, 0x15b, 0x155, 0x150, 0x14b, 0x146, 0x141, 0x13c, 0x137, 0x133, 0x12e, 0x129, 0x125, 0x121, 0x11c, 0x118,
+ 0x114, 0x10f, 0x10b, 0x107, 0x103, 0x0ff, 0x0fb, 0x0f8, 0x0f4, 0x0f0, 0x0ec, 0x0e9, 0x0e5, 0x0e2, 0x0de, 0x0db,
+ 0x0d7, 0x0d4, 0x0d1, 0x0cd, 0x0ca, 0x0c7, 0x0c4, 0x0c1, 0x0be, 0x0bb, 0x0b8, 0x0b5, 0x0b2, 0x0af, 0x0ac, 0x0a9,
+ 0x0a7, 0x0a4, 0x0a1, 0x09f, 0x09c, 0x099, 0x097, 0x094, 0x092, 0x08f, 0x08d, 0x08a, 0x088, 0x086, 0x083, 0x081,
+ 0x07f, 0x07d, 0x07a, 0x078, 0x076, 0x074, 0x072, 0x070, 0x06e, 0x06c, 0x06a, 0x068, 0x066, 0x064, 0x062, 0x060,
+ 0x05e, 0x05c, 0x05b, 0x059, 0x057, 0x055, 0x053, 0x052, 0x050, 0x04e, 0x04d, 0x04b, 0x04a, 0x048, 0x046, 0x045,
+ 0x043, 0x042, 0x040, 0x03f, 0x03e, 0x03c, 0x03b, 0x039, 0x038, 0x037, 0x035, 0x034, 0x033, 0x031, 0x030, 0x02f,
+ 0x02e, 0x02d, 0x02b, 0x02a, 0x029, 0x028, 0x027, 0x026, 0x025, 0x024, 0x023, 0x022, 0x021, 0x020, 0x01f, 0x01e,
+ 0x01d, 0x01c, 0x01b, 0x01a, 0x019, 0x018, 0x017, 0x017, 0x016, 0x015, 0x014, 0x014, 0x013, 0x012, 0x011, 0x011,
+ 0x010, 0x00f, 0x00f, 0x00e, 0x00d, 0x00d, 0x00c, 0x00c, 0x00b, 0x00a, 0x00a, 0x009, 0x009, 0x008, 0x008, 0x007,
+ 0x007, 0x007, 0x006, 0x006, 0x005, 0x005, 0x005, 0x004, 0x004, 0x004, 0x003, 0x003, 0x003, 0x002, 0x002, 0x002,
+ 0x002, 0x001, 0x001, 0x001, 0x001, 0x001, 0x001, 0x001, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000
+};
+
+//
+// exp table
+//
+
+static const Bit16u exprom[256] = {+ 0x000, 0x003, 0x006, 0x008, 0x00b, 0x00e, 0x011, 0x014, 0x016, 0x019, 0x01c, 0x01f, 0x022, 0x025, 0x028, 0x02a,
+ 0x02d, 0x030, 0x033, 0x036, 0x039, 0x03c, 0x03f, 0x042, 0x045, 0x048, 0x04b, 0x04e, 0x051, 0x054, 0x057, 0x05a,
+ 0x05d, 0x060, 0x063, 0x066, 0x069, 0x06c, 0x06f, 0x072, 0x075, 0x078, 0x07b, 0x07e, 0x082, 0x085, 0x088, 0x08b,
+ 0x08e, 0x091, 0x094, 0x098, 0x09b, 0x09e, 0x0a1, 0x0a4, 0x0a8, 0x0ab, 0x0ae, 0x0b1, 0x0b5, 0x0b8, 0x0bb, 0x0be,
+ 0x0c2, 0x0c5, 0x0c8, 0x0cc, 0x0cf, 0x0d2, 0x0d6, 0x0d9, 0x0dc, 0x0e0, 0x0e3, 0x0e7, 0x0ea, 0x0ed, 0x0f1, 0x0f4,
+ 0x0f8, 0x0fb, 0x0ff, 0x102, 0x106, 0x109, 0x10c, 0x110, 0x114, 0x117, 0x11b, 0x11e, 0x122, 0x125, 0x129, 0x12c,
+ 0x130, 0x134, 0x137, 0x13b, 0x13e, 0x142, 0x146, 0x149, 0x14d, 0x151, 0x154, 0x158, 0x15c, 0x160, 0x163, 0x167,
+ 0x16b, 0x16f, 0x172, 0x176, 0x17a, 0x17e, 0x181, 0x185, 0x189, 0x18d, 0x191, 0x195, 0x199, 0x19c, 0x1a0, 0x1a4,
+ 0x1a8, 0x1ac, 0x1b0, 0x1b4, 0x1b8, 0x1bc, 0x1c0, 0x1c4, 0x1c8, 0x1cc, 0x1d0, 0x1d4, 0x1d8, 0x1dc, 0x1e0, 0x1e4,
+ 0x1e8, 0x1ec, 0x1f0, 0x1f5, 0x1f9, 0x1fd, 0x201, 0x205, 0x209, 0x20e, 0x212, 0x216, 0x21a, 0x21e, 0x223, 0x227,
+ 0x22b, 0x230, 0x234, 0x238, 0x23c, 0x241, 0x245, 0x249, 0x24e, 0x252, 0x257, 0x25b, 0x25f, 0x264, 0x268, 0x26d,
+ 0x271, 0x276, 0x27a, 0x27f, 0x283, 0x288, 0x28c, 0x291, 0x295, 0x29a, 0x29e, 0x2a3, 0x2a8, 0x2ac, 0x2b1, 0x2b5,
+ 0x2ba, 0x2bf, 0x2c4, 0x2c8, 0x2cd, 0x2d2, 0x2d6, 0x2db, 0x2e0, 0x2e5, 0x2e9, 0x2ee, 0x2f3, 0x2f8, 0x2fd, 0x302,
+ 0x306, 0x30b, 0x310, 0x315, 0x31a, 0x31f, 0x324, 0x329, 0x32e, 0x333, 0x338, 0x33d, 0x342, 0x347, 0x34c, 0x351,
+ 0x356, 0x35b, 0x360, 0x365, 0x36a, 0x370, 0x375, 0x37a, 0x37f, 0x384, 0x38a, 0x38f, 0x394, 0x399, 0x39f, 0x3a4,
+ 0x3a9, 0x3ae, 0x3b4, 0x3b9, 0x3bf, 0x3c4, 0x3c9, 0x3cf, 0x3d4, 0x3da, 0x3df, 0x3e4, 0x3ea, 0x3ef, 0x3f5, 0x3fa
+};
+
+//
+// freq mult table multiplied by 2
+//
+// 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 12, 12, 15, 15
+//
+
+static const Bit8u mt[16] = { 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 20, 24, 24, 30, 30 };+
+//
+// ksl table
+//
+
+static const Bit8u kslrom[16] = { 0, 32, 40, 45, 48, 51, 53, 55, 56, 58, 59, 60, 61, 62, 63, 64 };+
+static const Bit8u kslshift[4] = { 8, 1, 2, 0 };+
+//
+// envelope generator constants
+//
+
+static const Bit8u eg_incstep[3][4][8] = {+ { { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } },+ { { 0, 1, 0, 1, 0, 1, 0, 1 }, { 0, 1, 0, 1, 1, 1, 0, 1 }, { 0, 1, 1, 1, 0, 1, 1, 1 }, { 0, 1, 1, 1, 1, 1, 1, 1 } },+ { { 1, 1, 1, 1, 1, 1, 1, 1 }, { 2, 2, 1, 1, 1, 1, 1, 1 }, { 2, 2, 1, 1, 2, 2, 1, 1 }, { 2, 2, 2, 2, 2, 2, 1, 1 } }+};
+
+static const Bit8u eg_incdesc[16] = {+ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2
+};
+
+static const Bit8s eg_incsh[16] = {+ 0, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, -1, -2
+};
+
+//
+// address decoding
+//
+
+static const Bit8s ad_slot[0x20] = { 0, 1, 2, 3, 4, 5, -1, -1, 6, 7, 8, 9, 10, 11, -1, -1, 12, 13, 14, 15, 16, 17, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };+static const Bit8u ch_slot[18] = { 0, 1, 2, 6, 7, 8, 12, 13, 14, 18, 19, 20, 24, 25, 26, 30, 31, 32 };+
+//
+// Envelope generator
+//
+
+typedef Bit16s(*envelope_sinfunc)(Bit16u phase, Bit16u envelope);
+typedef void(*envelope_genfunc)(opl_slot *slott);
+
+Bit16s envelope_calcexp(Bit32u level) {+ if (level > 0x1fff) {+ level = 0x1fff;
+ }
+ return ((exprom[(level & 0xff) ^ 0xff] | 0x400) << 1) >> (level >> 8);
+}
+
+Bit16s envelope_calcsin0(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ Bit16u neg = 0;
+ phase &= 0x3ff;
+ if (phase & 0x200) {+ neg = ~0;
+ }
+ if (phase & 0x100) {+ out = logsinrom[(phase & 0xff) ^ 0xff];
+ }
+ else {+ out = logsinrom[phase & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3)) ^ neg;
+}
+
+Bit16s envelope_calcsin1(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ phase &= 0x3ff;
+ if (phase & 0x200) {+ out = 0x1000;
+ }
+ else if (phase & 0x100) {+ out = logsinrom[(phase & 0xff) ^ 0xff];
+ }
+ else {+ out = logsinrom[phase & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3));
+}
+
+Bit16s envelope_calcsin2(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ phase &= 0x3ff;
+ if (phase & 0x100) {+ out = logsinrom[(phase & 0xff) ^ 0xff];
+ }
+ else {+ out = logsinrom[phase & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3));
+}
+
+Bit16s envelope_calcsin3(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ phase &= 0x3ff;
+ if (phase & 0x100) {+ out = 0x1000;
+ }
+ else {+ out = logsinrom[phase & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3));
+}
+
+Bit16s envelope_calcsin4(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ Bit16u neg = 0;
+ phase &= 0x3ff;
+ if ((phase & 0x300) == 0x100) {+ neg = ~0;
+ }
+ if (phase & 0x200) {+ out = 0x1000;
+ }
+ else if (phase & 0x80) {+ out = logsinrom[((phase ^ 0xff) << 1) & 0xff];
+ }
+ else {+ out = logsinrom[(phase << 1) & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3)) ^ neg;
+}
+
+Bit16s envelope_calcsin5(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ phase &= 0x3ff;
+ if (phase & 0x200) {+ out = 0x1000;
+ }
+ else if (phase & 0x80) {+ out = logsinrom[((phase ^ 0xff) << 1) & 0xff];
+ }
+ else {+ out = logsinrom[(phase << 1) & 0xff];
+ }
+ return envelope_calcexp(out + (envelope << 3));
+}
+
+Bit16s envelope_calcsin6(Bit16u phase, Bit16u envelope) {+ Bit16u neg = 0;
+ phase &= 0x3ff;
+ if (phase & 0x200) {+ neg = ~0;
+ }
+ return envelope_calcexp(envelope << 3) ^ neg;
+}
+
+Bit16s envelope_calcsin7(Bit16u phase, Bit16u envelope) {+ Bit16u out = 0;
+ Bit16u neg = 0;
+ phase &= 0x3ff;
+ if (phase & 0x200) {+ neg = ~0;
+ phase = (phase & 0x1ff) ^ 0x1ff;
+ }
+ out = phase << 3;
+ return envelope_calcexp(out + (envelope << 3)) ^ neg;
+}
+
+envelope_sinfunc envelope_sin[8] = {+ envelope_calcsin0,
+ envelope_calcsin1,
+ envelope_calcsin2,
+ envelope_calcsin3,
+ envelope_calcsin4,
+ envelope_calcsin5,
+ envelope_calcsin6,
+ envelope_calcsin7
+};
+
+void envelope_gen_off(opl_slot *slott);
+void envelope_gen_attack(opl_slot *slott);
+void envelope_gen_decay(opl_slot *slott);
+void envelope_gen_sustain(opl_slot *slott);
+void envelope_gen_release(opl_slot *slott);
+
+envelope_genfunc envelope_gen[5] = {+ envelope_gen_off,
+ envelope_gen_attack,
+ envelope_gen_decay,
+ envelope_gen_sustain,
+ envelope_gen_release
+};
+
+enum envelope_gen_num {+ envelope_gen_num_off = 0,
+ envelope_gen_num_attack = 1,
+ envelope_gen_num_decay = 2,
+ envelope_gen_num_sustain = 3,
+ envelope_gen_num_release = 4
+};
+
+Bit8u envelope_calc_rate(opl_slot *slot, Bit8u reg_rate) {+ Bit8u rate;
+ if (reg_rate == 0x00) {+ return 0x00;
+ }
+ rate = (reg_rate << 2) + (slot->reg_ksr ? slot->channel->ksv : (slot->channel->ksv >> 2));
+ if (rate > 0x3c) {+ rate = 0x3c;
+ }
+ return rate;
+}
+
+void envelope_update_ksl(opl_slot *slot) {+ Bit16s ksl = (kslrom[slot->channel->f_num >> 6] << 2) - ((0x08 - slot->channel->block) << 5);
+ if (ksl < 0) {+ ksl = 0;
+ }
+ slot->eg_ksl = (Bit8u)ksl;
+}
+
+void envelope_update_rate(opl_slot *slot) {+ switch (slot->eg_gen) {+ case envelope_gen_num_off:
+ slot->eg_rate = 0;
+ break;
+ case envelope_gen_num_attack:
+ slot->eg_rate = envelope_calc_rate(slot, slot->reg_ar);
+ break;
+ case envelope_gen_num_decay:
+ slot->eg_rate = envelope_calc_rate(slot, slot->reg_dr);
+ break;
+ case envelope_gen_num_sustain:
+ case envelope_gen_num_release:
+ slot->eg_rate = envelope_calc_rate(slot, slot->reg_rr);
+ break;
+ }
+}
+
+void envelope_gen_off(opl_slot *slot) {+ slot->eg_rout = 0x1ff;
+}
+
+void envelope_gen_attack(opl_slot *slot) {+ if (slot->eg_rout == 0x00) {+ slot->eg_gen = envelope_gen_num_decay;
+ envelope_update_rate(slot);
+ return;
+ }
+ slot->eg_rout += ((~slot->eg_rout) * slot->eg_inc) >> 3;
+ if (slot->eg_rout < 0x00) {+ slot->eg_rout = 0x00;
+ }
+}
+
+void envelope_gen_decay(opl_slot *slot) {+ if (slot->eg_rout >= slot->reg_sl << 4) {+ slot->eg_gen = envelope_gen_num_sustain;
+ envelope_update_rate(slot);
+ return;
+ }
+ slot->eg_rout += slot->eg_inc;
+}
+
+void envelope_gen_sustain(opl_slot *slot) {+ if (!slot->reg_type) {+ envelope_gen_release(slot);
+ }
+}
+
+void envelope_gen_release(opl_slot *slot) {+ if (slot->eg_rout >= 0x1ff) {+ slot->eg_gen = envelope_gen_num_off;
+ slot->eg_rout = 0x1ff;
+ envelope_update_rate(slot);
+ return;
+ }
+ slot->eg_rout += slot->eg_inc;
+}
+
+void envelope_calc(opl_slot *slot) {+ Bit8u rate_h, rate_l;
+ Bit8u inc = 0;
+ rate_h = slot->eg_rate >> 2;
+ rate_l = slot->eg_rate & 3;
+ if (eg_incsh[rate_h] > 0) {+ if ((slot->chip->timer & ((1 << eg_incsh[rate_h]) - 1)) == 0) {+ inc = eg_incstep[eg_incdesc[rate_h]][rate_l][((slot->chip->timer) >> eg_incsh[rate_h]) & 0x07];
+ }
+ }
+ else {+ inc = eg_incstep[eg_incdesc[rate_h]][rate_l][slot->chip->timer & 0x07] << (-eg_incsh[rate_h]);
+ }
+ slot->eg_inc = inc;
+ slot->eg_out = slot->eg_rout + (slot->reg_tl << 2) + (slot->eg_ksl >> kslshift[slot->reg_ksl]) + *slot->trem;
+ envelope_gen[slot->eg_gen](slot);
+}
+
+void eg_keyon(opl_slot *slot, Bit8u type) {+ if (!slot->key) {+ slot->eg_gen = envelope_gen_num_attack;
+ envelope_update_rate(slot);
+ if ((slot->eg_rate >> 2) == 0x0f) {+ slot->eg_gen = envelope_gen_num_decay;
+ envelope_update_rate(slot);
+ slot->eg_rout = 0x00;
+ }
+ slot->pg_phase = 0x00;
+ }
+ slot->key |= type;
+}
+
+void eg_keyoff(opl_slot *slot, Bit8u type) {+ if (slot->key) {+ slot->key &= (~type);
+ if (!slot->key) {+ slot->eg_gen = envelope_gen_num_release;
+ envelope_update_rate(slot);
+ }
+ }
+}
+
+//
+// Phase Generator
+//
+
+void pg_generate(opl_slot *slot) {+ Bit16u f_num;
+ Bit32u basefreq;
+
+ f_num = slot->channel->f_num;
+ if (slot->reg_vib) {+ Bit8s range;
+ Bit8u vibpos;
+
+ range = (f_num >> 7) & 7;
+ vibpos = slot->chip->vibpos;
+
+ if (!(vibpos & 3)) {+ range = 0;
+ }
+ else if (vibpos & 1) {+ range >>= 1;
+ }
+ range >>= slot->chip->vibshift;
+
+ if (vibpos & 4) {+ range = -range;
+ }
+ f_num += range;
+ }
+ basefreq = (f_num << slot->channel->block) >> 1;
+ slot->pg_phase += (basefreq * mt[slot->reg_mult]) >> 1;
+}
+
+//
+// Noise Generator
+//
+
+void n_generate(opl_chip *chip) {+ if (chip->noise & 0x01) {+ chip->noise ^= 0x800302;
+ }
+ chip->noise >>= 1;
+}
+
+//
+// Slot
+//
+
+void slot_write20(opl_slot *slot, Bit8u data) {+ if ((data >> 7) & 0x01) {+ slot->trem = &slot->chip->tremolo;
+ }
+ else {+ slot->trem = (Bit8u*)&slot->chip->zeromod;
+ }
+ slot->reg_vib = (data >> 6) & 0x01;
+ slot->reg_type = (data >> 5) & 0x01;
+ slot->reg_ksr = (data >> 4) & 0x01;
+ slot->reg_mult = data & 0x0f;
+ envelope_update_rate(slot);
+}
+
+void slot_write40(opl_slot *slot, Bit8u data) {+ slot->reg_ksl = (data >> 6) & 0x03;
+ slot->reg_tl = data & 0x3f;
+ envelope_update_ksl(slot);
+}
+
+void slot_write60(opl_slot *slot, Bit8u data) {+ slot->reg_ar = (data >> 4) & 0x0f;
+ slot->reg_dr = data & 0x0f;
+ envelope_update_rate(slot);
+}
+
+void slot_write80(opl_slot *slot, Bit8u data) {+ slot->reg_sl = (data >> 4) & 0x0f;
+ if (slot->reg_sl == 0x0f) {+ slot->reg_sl = 0x1f;
+ }
+ slot->reg_rr = data & 0x0f;
+ envelope_update_rate(slot);
+}
+
+void slot_writee0(opl_slot *slot, Bit8u data) {+ slot->reg_wf = data & 0x07;
+ if (slot->chip->newm == 0x00) {+ slot->reg_wf &= 0x03;
+ }
+}
+
+void slot_generatephase(opl_slot *slot, Bit16u phase) {+ slot->out = envelope_sin[slot->reg_wf](phase, slot->eg_out);
+}
+
+void slot_generate(opl_slot *slot) {+ slot_generatephase(slot, (Bit16u)(slot->pg_phase >> 9) + *slot->mod);
+}
+
+void slot_generatezm(opl_slot *slot) {+ slot_generatephase(slot, 0);
+}
+
+void slot_calcfb(opl_slot *slot) {+ if (slot->channel->fb != 0x00) {+ slot->fbmod = (slot->prout + slot->out) >> (0x09 - slot->channel->fb);
+ }
+ else {+ slot->fbmod = 0;
+ }
+ slot->prout = slot->out;
+}
+
+//
+// Channel
+//
+
+void chan_setupalg(opl_channel *channel);
+
+void chan_updaterhythm(opl_chip *chip, Bit8u data) {+ opl_channel *channel6;
+ opl_channel *channel7;
+ opl_channel *channel8;
+ Bit8u chnum;
+
+ chip->rhy = data & 0x3f;
+ if (chip->rhy & 0x20) {+ channel6 = &chip->channel[6];
+ channel7 = &chip->channel[7];
+ channel8 = &chip->channel[8];
+ channel6->out[0] = &channel6->slots[1]->out;
+ channel6->out[1] = &channel6->slots[1]->out;
+ channel6->out[2] = &chip->zeromod;
+ channel6->out[3] = &chip->zeromod;
+ channel7->out[0] = &channel7->slots[0]->out;
+ channel7->out[1] = &channel7->slots[0]->out;
+ channel7->out[2] = &channel7->slots[1]->out;
+ channel7->out[3] = &channel7->slots[1]->out;
+ channel8->out[0] = &channel8->slots[0]->out;
+ channel8->out[1] = &channel8->slots[0]->out;
+ channel8->out[2] = &channel8->slots[1]->out;
+ channel8->out[3] = &channel8->slots[1]->out;
+ for (chnum = 6; chnum < 9; chnum++) {+ chip->channel[chnum].chtype = ch_drum;
+ }
+ chan_setupalg(channel6);
+ //hh
+ if (chip->rhy & 0x01) {+ eg_keyon(channel7->slots[0], egk_drum);
+ }
+ else {+ eg_keyoff(channel7->slots[0], egk_drum);
+ }
+ //tc
+ if (chip->rhy & 0x02) {+ eg_keyon(channel8->slots[1], egk_drum);
+ }
+ else {+ eg_keyoff(channel8->slots[1], egk_drum);
+ }
+ //tom
+ if (chip->rhy & 0x04) {+ eg_keyon(channel8->slots[0], egk_drum);
+ }
+ else {+ eg_keyoff(channel8->slots[0], egk_drum);
+ }
+ //sd
+ if (chip->rhy & 0x08) {+ eg_keyon(channel7->slots[1], egk_drum);
+ }
+ else {+ eg_keyoff(channel7->slots[1], egk_drum);
+ }
+ //bd
+ if (chip->rhy & 0x10) {+ eg_keyon(channel6->slots[0], egk_drum);
+ eg_keyon(channel6->slots[1], egk_drum);
+ }
+ else {+ eg_keyoff(channel6->slots[0], egk_drum);
+ eg_keyoff(channel6->slots[1], egk_drum);
+ }
+ }
+ else {+ for (chnum = 6; chnum < 9; chnum++) {+ chip->channel[chnum].chtype = ch_2op;
+ chan_setupalg(&chip->channel[chnum]);
+ }
+ }
+}
+
+void chan_writea0(opl_channel *channel, Bit8u data) {+ if (channel->chip->newm && channel->chtype == ch_4op2) {+ return;
+ }
+ channel->f_num = (channel->f_num & 0x300) | data;
+ channel->ksv = (channel->block << 1) | ((channel->f_num >> (0x09 - channel->chip->nts)) & 0x01);
+ envelope_update_ksl(channel->slots[0]);
+ envelope_update_ksl(channel->slots[1]);
+ envelope_update_rate(channel->slots[0]);
+ envelope_update_rate(channel->slots[1]);
+ if (channel->chip->newm && channel->chtype == ch_4op) {+ channel->pair->f_num = channel->f_num;
+ channel->pair->ksv = channel->ksv;
+ envelope_update_ksl(channel->pair->slots[0]);
+ envelope_update_ksl(channel->pair->slots[1]);
+ envelope_update_rate(channel->pair->slots[0]);
+ envelope_update_rate(channel->pair->slots[1]);
+ }
+}
+
+void chan_writeb0(opl_channel *channel, Bit8u data) {+ if (channel->chip->newm && channel->chtype == ch_4op2) {+ return;
+ }
+ channel->f_num = (channel->f_num & 0xff) | ((data & 0x03) << 8);
+ channel->block = (data >> 2) & 0x07;
+ channel->ksv = (channel->block << 1) | ((channel->f_num >> (0x09 - channel->chip->nts)) & 0x01);
+ envelope_update_ksl(channel->slots[0]);
+ envelope_update_ksl(channel->slots[1]);
+ envelope_update_rate(channel->slots[0]);
+ envelope_update_rate(channel->slots[1]);
+ if (channel->chip->newm && channel->chtype == ch_4op) {+ channel->pair->f_num = channel->f_num;
+ channel->pair->block = channel->block;
+ channel->pair->ksv = channel->ksv;
+ envelope_update_ksl(channel->pair->slots[0]);
+ envelope_update_ksl(channel->pair->slots[1]);
+ envelope_update_rate(channel->pair->slots[0]);
+ envelope_update_rate(channel->pair->slots[1]);
+ }
+}
+
+void chan_setupalg(opl_channel *channel) {+ if (channel->chtype == ch_drum) {+ switch (channel->alg & 0x01) {+ case 0x00:
+ channel->slots[0]->mod = &channel->slots[0]->fbmod;
+ channel->slots[1]->mod = &channel->slots[0]->out;
+ break;
+ case 0x01:
+ channel->slots[0]->mod = &channel->slots[0]->fbmod;
+ channel->slots[1]->mod = &channel->chip->zeromod;
+ break;
+ }
+ return;
+ }
+ if (channel->alg & 0x08) {+ return;
+ }
+ if (channel->alg & 0x04) {+ channel->pair->out[0] = &channel->chip->zeromod;
+ channel->pair->out[1] = &channel->chip->zeromod;
+ channel->pair->out[2] = &channel->chip->zeromod;
+ channel->pair->out[3] = &channel->chip->zeromod;
+ switch (channel->alg & 0x03) {+ case 0x00:
+ channel->pair->slots[0]->mod = &channel->pair->slots[0]->fbmod;
+ channel->pair->slots[1]->mod = &channel->pair->slots[0]->out;
+ channel->slots[0]->mod = &channel->pair->slots[1]->out;
+ channel->slots[1]->mod = &channel->slots[0]->out;
+ channel->out[0] = &channel->slots[1]->out;
+ channel->out[1] = &channel->chip->zeromod;
+ channel->out[2] = &channel->chip->zeromod;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ case 0x01:
+ channel->pair->slots[0]->mod = &channel->pair->slots[0]->fbmod;
+ channel->pair->slots[1]->mod = &channel->pair->slots[0]->out;
+ channel->slots[0]->mod = &channel->chip->zeromod;
+ channel->slots[1]->mod = &channel->slots[0]->out;
+ channel->out[0] = &channel->pair->slots[1]->out;
+ channel->out[1] = &channel->slots[1]->out;
+ channel->out[2] = &channel->chip->zeromod;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ case 0x02:
+ channel->pair->slots[0]->mod = &channel->pair->slots[0]->fbmod;
+ channel->pair->slots[1]->mod = &channel->chip->zeromod;
+ channel->slots[0]->mod = &channel->pair->slots[1]->out;
+ channel->slots[1]->mod = &channel->slots[0]->out;
+ channel->out[0] = &channel->pair->slots[0]->out;
+ channel->out[1] = &channel->slots[1]->out;
+ channel->out[2] = &channel->chip->zeromod;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ case 0x03:
+ channel->pair->slots[0]->mod = &channel->pair->slots[0]->fbmod;
+ channel->pair->slots[1]->mod = &channel->chip->zeromod;
+ channel->slots[0]->mod = &channel->pair->slots[1]->out;
+ channel->slots[1]->mod = &channel->chip->zeromod;
+ channel->out[0] = &channel->pair->slots[0]->out;
+ channel->out[1] = &channel->slots[0]->out;
+ channel->out[2] = &channel->slots[1]->out;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ }
+ }
+ else {+ switch (channel->alg & 0x01) {+ case 0x00:
+ channel->slots[0]->mod = &channel->slots[0]->fbmod;
+ channel->slots[1]->mod = &channel->slots[0]->out;
+ channel->out[0] = &channel->slots[1]->out;
+ channel->out[1] = &channel->chip->zeromod;
+ channel->out[2] = &channel->chip->zeromod;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ case 0x01:
+ channel->slots[0]->mod = &channel->slots[0]->fbmod;
+ channel->slots[1]->mod = &channel->chip->zeromod;
+ channel->out[0] = &channel->slots[0]->out;
+ channel->out[1] = &channel->slots[1]->out;
+ channel->out[2] = &channel->chip->zeromod;
+ channel->out[3] = &channel->chip->zeromod;
+ break;
+ }
+ }
+}
+
+void chan_writec0(opl_channel *channel, Bit8u data) {+ channel->fb = (data & 0x0e) >> 1;
+ channel->con = data & 0x01;
+ channel->alg = channel->con;
+ if (channel->chip->newm) {+ if (channel->chtype == ch_4op) {+ channel->pair->alg = 0x04 | (channel->con << 1) | (channel->pair->con);
+ channel->alg = 0x08;
+ chan_setupalg(channel->pair);
+ }
+ else if (channel->chtype == ch_4op2) {+ channel->alg = 0x04 | (channel->pair->con << 1) | (channel->con);
+ channel->pair->alg = 0x08;
+ chan_setupalg(channel);
+ }
+ else {+ chan_setupalg(channel);
+ }
+ }
+ else {+ chan_setupalg(channel);
+ }
+ if (channel->chip->newm) {+ channel->cha = ((data >> 4) & 0x01) ? ~0 : 0;
+ channel->chb = ((data >> 5) & 0x01) ? ~0 : 0;
+ }
+ else {+ channel->cha = channel->chb = ~0;
+ }
+}
+
+void chan_generaterhythm1(opl_chip *chip) {+ opl_channel *channel6;
+ opl_channel *channel7;
+ opl_channel *channel8;
+ Bit16u phase14;
+ Bit16u phase17;
+ Bit16u phase;
+ Bit16u phasebit;
+
+ channel6 = &chip->channel[6];
+ channel7 = &chip->channel[7];
+ channel8 = &chip->channel[8];
+ slot_generate(channel6->slots[0]);
+ phase14 = (channel7->slots[0]->pg_phase >> 9) & 0x3ff;
+ phase17 = (channel8->slots[1]->pg_phase >> 9) & 0x3ff;
+ phase = 0x00;
+ //hh tc phase bit
+ phasebit = ((phase14 & 0x08) | (((phase14 >> 5) ^ phase14) & 0x04) | (((phase17 >> 2) ^ phase17) & 0x08)) ? 0x01 : 0x00;
+ //hh
+ phase = (phasebit << 9) | (0x34 << ((phasebit ^ (chip->noise & 0x01) << 1)));
+ slot_generatephase(channel7->slots[0], phase);
+ //tt
+ slot_generatezm(channel8->slots[0]);
+}
+
+void chan_generaterhythm2(opl_chip *chip) {+ opl_channel *channel6;
+ opl_channel *channel7;
+ opl_channel *channel8;
+ Bit16u phase14;
+ Bit16u phase17;
+ Bit16u phase;
+ Bit16u phasebit;
+
+ channel6 = &chip->channel[6];
+ channel7 = &chip->channel[7];
+ channel8 = &chip->channel[8];
+ slot_generate(channel6->slots[1]);
+ phase14 = (channel7->slots[0]->pg_phase >> 9) & 0x3ff;
+ phase17 = (channel8->slots[1]->pg_phase >> 9) & 0x3ff;
+ phase = 0x00;
+ //hh tc phase bit
+ phasebit = ((phase14 & 0x08) | (((phase14 >> 5) ^ phase14) & 0x04) | (((phase17 >> 2) ^ phase17) & 0x08)) ? 0x01 : 0x00;
+ //sd
+ phase = (0x100 << ((phase14 >> 8) & 0x01)) ^ ((chip->noise & 0x01) << 8);
+ slot_generatephase(channel7->slots[1], phase);
+ //tc
+ phase = 0x100 | (phasebit << 9);
+ slot_generatephase(channel8->slots[1], phase);
+}
+
+void chan_enable(opl_channel *channel) {+ if (channel->chip->newm) {+ if (channel->chtype == ch_4op) {+ eg_keyon(channel->slots[0], egk_norm);
+ eg_keyon(channel->slots[1], egk_norm);
+ eg_keyon(channel->pair->slots[0], egk_norm);
+ eg_keyon(channel->pair->slots[1], egk_norm);
+ }
+ else if (channel->chtype == ch_2op || channel->chtype == ch_drum) {+ eg_keyon(channel->slots[0], egk_norm);
+ eg_keyon(channel->slots[1], egk_norm);
+ }
+ }
+ else {+ eg_keyon(channel->slots[0], egk_norm);
+ eg_keyon(channel->slots[1], egk_norm);
+ }
+}
+
+void chan_disable(opl_channel *channel) {+ if (channel->chip->newm) {+ if (channel->chtype == ch_4op) {+ eg_keyoff(channel->slots[0], egk_norm);
+ eg_keyoff(channel->slots[1], egk_norm);
+ eg_keyoff(channel->pair->slots[0], egk_norm);
+ eg_keyoff(channel->pair->slots[1], egk_norm);
+ }
+ else if (channel->chtype == ch_2op || channel->chtype == ch_drum) {+ eg_keyoff(channel->slots[0], egk_norm);
+ eg_keyoff(channel->slots[1], egk_norm);
+ }
+ }
+ else {+ eg_keyoff(channel->slots[0], egk_norm);
+ eg_keyoff(channel->slots[1], egk_norm);
+ }
+}
+
+void chan_set4op(opl_chip *chip, Bit8u data) {+ Bit8u bit;
+ Bit8u chnum;
+ for (bit = 0; bit < 6; bit++) {+ chnum = bit;
+ if (bit >= 3) {+ chnum += 9 - 3;
+ }
+ if ((data >> bit) & 0x01) {+ chip->channel[chnum].chtype = ch_4op;
+ chip->channel[chnum + 3].chtype = ch_4op2;
+ }
+ else {+ chip->channel[chnum].chtype = ch_2op;
+ chip->channel[chnum + 3].chtype = ch_2op;
+ }
+ }
+}
+
+Bit16s limshort(Bit32s a) {+ if (a > 32767) {+ a = 32767;
+ }
+ else if (a < -32768) {+ a = -32768;
+ }
+ return (Bit16s)a;
+}
+
+void chip_generate(opl_chip *chip, Bit16s *buff) {+ Bit8u ii;
+ Bit8u jj;
+ Bit16s accm;
+
+ buff[1] = limshort(chip->mixbuff[1]);
+
+ for (ii = 0; ii < 12; ii++) {+ slot_calcfb(&chip->slot[ii]);
+ pg_generate(&chip->slot[ii]);
+ envelope_calc(&chip->slot[ii]);
+ slot_generate(&chip->slot[ii]);
+ }
+
+ for (ii = 12; ii < 15; ii++) {+ slot_calcfb(&chip->slot[ii]);
+ pg_generate(&chip->slot[ii]);
+ envelope_calc(&chip->slot[ii]);
+ }
+
+ if (chip->rhy & 0x20) {+ chan_generaterhythm1(chip);
+ }
+ else {+ slot_generate(&chip->slot[12]);
+ slot_generate(&chip->slot[13]);
+ slot_generate(&chip->slot[14]);
+ }
+
+ chip->mixbuff[0] = 0;
+ for (ii = 0; ii < 18; ii++) {+ accm = 0;
+ for (jj = 0; jj < 4; jj++) {+ accm += *chip->channel[ii].out[jj];
+ }
+ chip->mixbuff[0] += (Bit16s)(accm & chip->channel[ii].cha);
+ }
+
+ for (ii = 15; ii < 18; ii++) {+ slot_calcfb(&chip->slot[ii]);
+ pg_generate(&chip->slot[ii]);
+ envelope_calc(&chip->slot[ii]);
+ }
+
+ if (chip->rhy & 0x20) {+ chan_generaterhythm2(chip);
+ }
+ else {+ slot_generate(&chip->slot[15]);
+ slot_generate(&chip->slot[16]);
+ slot_generate(&chip->slot[17]);
+ }
+
+ buff[0] = limshort(chip->mixbuff[0]);
+
+ for (ii = 18; ii < 33; ii++) {+ slot_calcfb(&chip->slot[ii]);
+ pg_generate(&chip->slot[ii]);
+ envelope_calc(&chip->slot[ii]);
+ slot_generate(&chip->slot[ii]);
+ }
+
+ chip->mixbuff[1] = 0;
+ for (ii = 0; ii < 18; ii++) {+ accm = 0;
+ for (jj = 0; jj < 4; jj++) {+ accm += *chip->channel[ii].out[jj];
+ }
+ chip->mixbuff[1] += (Bit16s)(accm & chip->channel[ii].chb);
+ }
+
+ for (ii = 33; ii < 36; ii++) {+ slot_calcfb(&chip->slot[ii]);
+ pg_generate(&chip->slot[ii]);
+ envelope_calc(&chip->slot[ii]);
+ slot_generate(&chip->slot[ii]);
+ }
+
+ n_generate(chip);
+
+ if ((chip->timer & 0x3f) == 0x3f) {+ chip->tremolopos = (chip->tremolopos + 1) % 210;
+ if (chip->tremolopos < 105) {+ chip->tremolo = chip->tremolopos >> (2 + chip->tremoloshift);
+ }
+ else {+ chip->tremolo = (210 - chip->tremolopos) >> (2 + chip->tremoloshift);
+ }
+ }
+
+ if ((chip->timer & 0x3ff) == 0x3ff) {+ chip->vibpos = (chip->vibpos + 1) & 7;
+ }
+
+ chip->timer++;
+}
+
+void chip_generate_opl3l(opl_chip *chip, Bit16s *buffer) {+ while (chip->samplecnt >= chip->rateratio) {+ chip->oldsamples[0] = chip->samples[0];
+ chip->oldsamples[1] = chip->samples[1];
+ chip_generate(chip, chip->samples);
+ chip->samplecnt -= chip->rateratio;
+ }
+ buffer[0] = (Bit16s)((chip->oldsamples[0] * (chip->rateratio - chip->samplecnt) + chip->samples[0] * chip->samplecnt) / chip->rateratio);
+ buffer[1] = (Bit16s)((chip->oldsamples[1] * (chip->rateratio - chip->samplecnt) + chip->samples[1] * chip->samplecnt) / chip->rateratio);
+ chip->samplecnt += 1 << RSM_FRAC;
+}
+
+void chip_reset(opl_chip *chip, Bit32u samplerate) {+ Bit8u slotnum;
+ Bit8u channum;
+
+ memset(chip, 0, sizeof(opl_chip));
+ for (slotnum = 0; slotnum < 36; slotnum++) {+ chip->slot[slotnum].chip = chip;
+ chip->slot[slotnum].mod = &chip->zeromod;
+ chip->slot[slotnum].eg_rout = 0x1ff;
+ chip->slot[slotnum].eg_out = 0x1ff;
+ chip->slot[slotnum].eg_gen = envelope_gen_num_off;
+ chip->slot[slotnum].trem = (Bit8u*)&chip->zeromod;
+ }
+ for (channum = 0; channum < 18; channum++) {+ chip->channel[channum].slots[0] = &chip->slot[ch_slot[channum]];
+ chip->channel[channum].slots[1] = &chip->slot[ch_slot[channum] + 3];
+ chip->slot[ch_slot[channum]].channel = &chip->channel[channum];
+ chip->slot[ch_slot[channum] + 3].channel = &chip->channel[channum];
+ if ((channum % 9) < 3) {+ chip->channel[channum].pair = &chip->channel[channum + 3];
+ }
+ else if ((channum % 9) < 6) {+ chip->channel[channum].pair = &chip->channel[channum - 3];
+ }
+ chip->channel[channum].chip = chip;
+ chip->channel[channum].out[0] = &chip->zeromod;
+ chip->channel[channum].out[1] = &chip->zeromod;
+ chip->channel[channum].out[2] = &chip->zeromod;
+ chip->channel[channum].out[3] = &chip->zeromod;
+ chip->channel[channum].chtype = ch_2op;
+ chip->channel[channum].cha = ~0;
+ chip->channel[channum].chb = ~0;
+ chan_setupalg(&chip->channel[channum]);
+ }
+ chip->noise = 0x306600;
+ chip->rateratio = (samplerate << RSM_FRAC) / 49716;
+}
+
+void chip_write(opl_chip *chip, Bit16u reg, Bit8u v) {+ Bit8u high = (reg >> 8) & 0x01;
+ Bit8u regm = reg & 0xff;
+ switch (regm & 0xf0) {+ case 0x00:
+ if (high) {+ switch (regm & 0x0f) {+ case 0x04:
+ chan_set4op(chip, v);
+ break;
+ case 0x05:
+ chip->newm = v & 0x01;
+ break;
+ }
+ }
+ else {+ switch (regm & 0x0f) {+ case 0x08:
+ chip->nts = (v >> 6) & 0x01;
+ break;
+ }
+ }
+ break;
+ case 0x20:
+ case 0x30:
+ if (ad_slot[regm & 0x1f] >= 0) {+ slot_write20(&chip->slot[18 * high + ad_slot[regm & 0x1f]], v);
+ }
+ break;
+ case 0x40:
+ case 0x50:
+ if (ad_slot[regm & 0x1f] >= 0) {+ slot_write40(&chip->slot[18 * high + ad_slot[regm & 0x1f]], v);
+ }
+ break;
+ case 0x60:
+ case 0x70:
+ if (ad_slot[regm & 0x1f] >= 0) {+ slot_write60(&chip->slot[18 * high + ad_slot[regm & 0x1f]], v);
+ }
+ break;
+ case 0x80:
+ case 0x90:
+ if (ad_slot[regm & 0x1f] >= 0) {+ slot_write80(&chip->slot[18 * high + ad_slot[regm & 0x1f]], v);;
+ }
+ break;
+ case 0xe0:
+ case 0xf0:
+ if (ad_slot[regm & 0x1f] >= 0) {+ slot_writee0(&chip->slot[18 * high + ad_slot[regm & 0x1f]], v);
+ }
+ break;
+ case 0xa0:
+ if ((regm & 0x0f) < 9) {+ chan_writea0(&chip->channel[9 * high + (regm & 0x0f)], v);
+ }
+ break;
+ case 0xb0:
+ if (regm == 0xbd && !high) {+ chip->tremoloshift = ((v >> 7) ^ 1) << 1;
+ chip->vibshift = ((v >> 6) & 0x01) ^ 1;
+ chan_updaterhythm(chip, v);
+ }
+ else if ((regm & 0x0f) < 9) {+ chan_writeb0(&chip->channel[9 * high + (regm & 0x0f)], v);
+ if (v & 0x20) {+ chan_enable(&chip->channel[9 * high + (regm & 0x0f)]);
+ }
+ else {+ chan_disable(&chip->channel[9 * high + (regm & 0x0f)]);
+ }
+ }
+ break;
+ case 0xc0:
+ if ((regm & 0x0f) < 9) {+ chan_writec0(&chip->channel[9 * high + (regm & 0x0f)], v);
+ }
+ break;
+ }
+}
+
+
+void chip_update(opl_chip *chip, Bit16s* sndptr, Bit32u numsamples) {+ Bit32u i;
+
+ for(i = 0; i < numsamples; i++) {+ chip_generate_opl3l(chip, sndptr);
+ sndptr += 2;
+ }
+}
--- /dev/null
+++ b/opl/opl3.h
@@ -1,0 +1,107 @@
+//
+// Copyright (C) 2013-2016 Alexey Khokholov (Nuke.YKT)
+//
+// 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.
+//
+//
+// Nuked OPL3 emulator.
+// Thanks:
+// MAME Development Team(Jarek Burczynski, Tatsuyuki Satoh):
+// Feedback and Rhythm part calculation information.
+// forums.submarine.org.uk(carbon14, opl3):
+// Tremolo and phase generator calculation information.
+// OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
+// OPL2 ROMs.
+//
+// version: 1.6.2
+//
+
+#ifndef OPL_OPL3_H
+#define OPL_OPL3_H
+
+#include "opl.h"
+
+typedef struct _opl_slot opl_slot;
+typedef struct _opl_channel opl_channel;
+typedef struct _opl_chip opl_chip;
+
+struct _opl_slot {+ opl_channel *channel;
+ opl_chip *chip;
+ Bit16s out;
+ Bit16s fbmod;
+ Bit16s *mod;
+ Bit16s prout;
+ Bit16s eg_rout;
+ Bit16s eg_out;
+ Bit8u eg_inc;
+ Bit8u eg_gen;
+ Bit8u eg_rate;
+ Bit8u eg_ksl;
+ Bit8u *trem;
+ Bit8u reg_vib;
+ Bit8u reg_type;
+ Bit8u reg_ksr;
+ Bit8u reg_mult;
+ Bit8u reg_ksl;
+ Bit8u reg_tl;
+ Bit8u reg_ar;
+ Bit8u reg_dr;
+ Bit8u reg_sl;
+ Bit8u reg_rr;
+ Bit8u reg_wf;
+ Bit8u key;
+ Bit32u pg_phase;
+ Bit32u timer;
+};
+
+struct _opl_channel {+ opl_slot *slots[2];
+ opl_channel *pair;
+ opl_chip *chip;
+ Bit16s *out[4];
+ Bit8u chtype;
+ Bit16u f_num;
+ Bit8u block;
+ Bit8u fb;
+ Bit8u con;
+ Bit8u alg;
+ Bit8u ksv;
+ Bit16u cha, chb;
+};
+
+struct _opl_chip {+ opl_channel channel[18];
+ opl_slot slot[36];
+ Bit16u timer;
+ Bit8u newm;
+ Bit8u nts;
+ Bit8u rhy;
+ Bit8u vibpos;
+ Bit8u vibshift;
+ Bit8u tremolo;
+ Bit8u tremolopos;
+ Bit8u tremoloshift;
+ Bit32u noise;
+ Bit16s zeromod;
+ Bit32s mixbuff[2];
+ //OPL3L
+ Bit32s rateratio;
+ Bit32s samplecnt;
+ Bit16s oldsamples[2];
+ Bit16s samples[2];
+};
+
+
+void chip_reset(opl_chip *chip, Bit32u samplerate);
+void chip_write(opl_chip *chip, Bit16u reg, Bit8u v);
+void chip_update(opl_chip *chip, Bit16s* sndptr, Bit32u numsamples);
+#endif
--- a/opl/opl_internal.h
+++ b/opl/opl_internal.h
@@ -50,9 +50,21 @@
opl_adjust_callbacks_func adjust_callbacks_func;
} opl_driver_t;
+typedef void (*opl_core_init_func)(unsigned int rate);
+typedef void (*opl_core_write_func)(unsigned int reg, unsigned int data);
+typedef void (*opl_core_fill_buffer_func)(int16_t *buffer, unsigned int nsamples);
+
+typedef struct
+{+ opl_core_init_func init_func;
+ opl_core_write_func write_func;
+ opl_core_fill_buffer_func fill_buffer_func;
+} opl_sdl_core_t;
+
// Sample rate to use when doing software emulation.
extern unsigned int opl_sample_rate;
+extern opl_core_t opl_emu;
#endif /* #ifndef OPL_INTERNAL_H */
--- a/opl/opl_sdl.c
+++ b/opl/opl_sdl.c
@@ -26,6 +26,7 @@
#include "SDL_mixer.h"
#include "dbopl.h"
+#include "opl3.h"
#include "opl.h"
#include "opl_internal.h"
@@ -70,7 +71,8 @@
// OPL software emulator structure.
-static Chip opl_chip;
+static Chip opl_dbopl_chip;
+static opl_chip opl_nuked_chip;
static int opl_opl3mode;
// Temporary mixing buffer used by the mixing callback.
@@ -92,6 +94,88 @@
static int mixing_freq, mixing_channels;
static Uint16 mixing_format;
+// OPL cores.
+
+opl_sdl_core_t *opl_sdl_core = NULL;
+
+static void OPL_Nuked_Init(unsigned int rate)
+{+ chip_reset(&opl_nuked_chip, rate);
+}
+
+static void OPL_Nuked_Write(unsigned int reg, unsigned int data)
+{+ chip_write(&opl_nuked_chip, reg, data);
+}
+
+static void OPL_Nuked_Fill_Buffer(int16_t *buffer, unsigned int nsamples)
+{+ chip_update(&opl_nuked_chip, (Bit16s*)buffer, nsamples);
+}
+
+opl_sdl_core_t opl_nuked_core =
+{+ OPL_Nuked_Init,
+ OPL_Nuked_Write,
+ OPL_Nuked_Fill_Buffer
+};
+
+static void OPL_DBOPL_Init(unsigned int rate)
+{+ DBOPL_InitTables();
+ Chip__Chip(&opl_dbopl_chip);
+ Chip__Setup(&opl_dbopl_chip, mixing_freq);
+}
+
+static void OPL_DBOPL_Write(unsigned int reg, unsigned int data)
+{+ Chip__WriteReg(&opl_dbopl_chip, reg, data);
+}
+
+static void OPL_DBOPL_Fill_Buffer(int16_t *buffer, unsigned int nsamples)
+{+ unsigned int i;
+
+ // This seems like a reasonable assumption. mix_buffer is
+ // 1 second long, which should always be much longer than the
+ // SDL mix buffer.
+
+ assert(nsamples < mixing_freq);
+
+ if (opl_opl3mode)
+ {+ Chip__GenerateBlock3(&opl_dbopl_chip, nsamples, mix_buffer);
+
+ // Mix into the destination buffer, doubling up into stereo.
+
+ for (i=0; i<nsamples; ++i)
+ {+ buffer[i * 2] = (int16_t) mix_buffer[i * 2];
+ buffer[i * 2 + 1] = (int16_t) mix_buffer[i * 2 + 1];
+ }
+ }
+ else
+ {+ Chip__GenerateBlock2(&opl_dbopl_chip, nsamples, mix_buffer);
+
+ // Mix into the destination buffer, doubling up into stereo.
+
+ for (i=0; i<nsamples; ++i)
+ {+ buffer[i * 2] = (int16_t) mix_buffer[i];
+ buffer[i * 2 + 1] = (int16_t) mix_buffer[i];
+ }
+ }
+}
+
+opl_sdl_core_t opl_dbopl_core =
+{+ OPL_DBOPL_Init,
+ OPL_DBOPL_Write,
+ OPL_DBOPL_Fill_Buffer
+};
+
+
static int SDLIsInitialized(void)
{int freq, channels;
@@ -153,44 +237,6 @@
SDL_UnlockMutex(callback_queue_mutex);
}
-// Call the OPL emulator code to fill the specified buffer.
-
-static void FillBuffer(int16_t *buffer, unsigned int nsamples)
-{- unsigned int i;
-
- // This seems like a reasonable assumption. mix_buffer is
- // 1 second long, which should always be much longer than the
- // SDL mix buffer.
-
- assert(nsamples < mixing_freq);
-
- if (opl_opl3mode)
- {- Chip__GenerateBlock3(&opl_chip, nsamples, mix_buffer);
-
- // Mix into the destination buffer, doubling up into stereo.
-
- for (i=0; i<nsamples; ++i)
- {- buffer[i * 2] = (int16_t) mix_buffer[i * 2];
- buffer[i * 2 + 1] = (int16_t) mix_buffer[i * 2 + 1];
- }
- }
- else
- {- Chip__GenerateBlock2(&opl_chip, nsamples, mix_buffer);
-
- // Mix into the destination buffer, doubling up into stereo.
-
- for (i=0; i<nsamples; ++i)
- {- buffer[i * 2] = (int16_t) mix_buffer[i];
- buffer[i * 2 + 1] = (int16_t) mix_buffer[i];
- }
- }
-}
-
// Callback function to fill a new sound buffer:
static void OPL_Mix_Callback(void *udata,
@@ -241,7 +287,7 @@
// Add emulator output to buffer.
- FillBuffer(buffer + filled * 2, nsamples);
+ opl_sdl_core->fill_buffer_func(buffer + filled * 2, nsamples);
filled += nsamples;
// Invoke callbacks for this point in time.
@@ -371,9 +417,18 @@
// Create the emulator structure:
- DBOPL_InitTables();
- Chip__Chip(&opl_chip);
- Chip__Setup(&opl_chip, mixing_freq);
+ switch (opl_emu)
+ {+ case OPL_CORE_NUKED:
+ default:
+ opl_sdl_core = &opl_nuked_core;
+ break;
+ case OPL_CORE_DBOPL:
+ opl_sdl_core = &opl_dbopl_core;
+ break;
+ }
+
+ opl_sdl_core->init_func(mixing_freq);
opl_opl3mode = 0;
callback_mutex = SDL_CreateMutex();
@@ -465,7 +520,7 @@
opl_opl3mode = value & 0x01;
default:
- Chip__WriteReg(&opl_chip, reg_num, value);
+ opl_sdl_core->write_func(reg_num, value);
break;
}
}
--- a/src/i_oplmusic.c
+++ b/src/i_oplmusic.c
@@ -353,6 +353,7 @@
char *snd_dmxoption = "";
int opl_io_port = 0x388;
+int opl_core = OPL_CORE_NUKED;
// If true, OPL sound channels are reversed to their correct arrangement
// (as intended by the MIDI standard) rather than the backwards one
@@ -1760,7 +1761,7 @@
char *dmxoption;
opl_init_result_t chip_type;
- OPL_SetSampleRate(snd_samplerate);
+ OPL_SetSampleRateAndCore(snd_samplerate, (opl_core_t)opl_core);
chip_type = OPL_Init(opl_io_port);
if (chip_type == OPL_INIT_NONE)
--- a/src/i_sound.c
+++ b/src/i_sound.c
@@ -73,6 +73,7 @@
extern opl_driver_ver_t opl_drv_ver;
extern int opl_io_port;
+extern int opl_core;
// For native music module:
@@ -453,6 +454,7 @@
M_BindIntVariable("snd_samplerate", &snd_samplerate); M_BindIntVariable("snd_cachesize", &snd_cachesize); M_BindIntVariable("opl_io_port", &opl_io_port);+ M_BindIntVariable("opl_core", &opl_core); M_BindIntVariable("snd_pitchshift", &snd_pitchshift); M_BindStringVariable("timidity_cfg_path", &timidity_cfg_path);--- a/src/m_config.c
+++ b/src/m_config.c
@@ -839,6 +839,13 @@
CONFIG_VARIABLE_INT_HEX(opl_io_port),
//!
+ // OPL emulator. A value of zero enables Nuked OPL core. A value of 1
+ // enables DOSBox DBOPL core.
+ //
+
+ CONFIG_VARIABLE_INT(opl_core),
+
+ //!
// @game doom heretic strife
//
// If non-zero, the ENDOOM text screen is displayed when exiting the
--- a/src/setup/sound.c
+++ b/src/setup/sound.c
@@ -74,6 +74,19 @@
"OPL3"
};
+typedef enum
+{+ OPLCORE_NUKED,
+ OPLMODE_DBOPL,
+ NUM_OPLCORES,
+} oplcore_t;
+
+static char *oplcore_strings[] =
+{+ "Nuked OPL",
+ "DOSBox DBOPL"
+};
+
static char *cfg_extension[] = { "cfg", NULL };// Config file variables:
@@ -114,6 +127,7 @@
static int snd_sfxmode;
static int snd_musicmode;
static int snd_oplmode;
+static int opl_core = OPLCORE_NUKED;
static void UpdateSndDevices(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(data))
{@@ -195,6 +209,8 @@
TXT_AddWidgets(extra_table,
TXT_NewLabel("OPL type"),OPLTypeSelector(),
+ TXT_NewLabel("OPL emulator"),+ TXT_NewDropdownList(&opl_core, oplcore_strings, 2),
NULL);
break;
@@ -384,6 +400,7 @@
M_BindIntVariable("snd_cachesize", &snd_cachesize); M_BindIntVariable("opl_io_port", &opl_io_port);+ M_BindIntVariable("opl_core", &opl_core); M_BindIntVariable("snd_pitchshift", &snd_pitchshift);