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author | Max Horn | 2003-05-04 21:17:42 +0000 |
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committer | Max Horn | 2003-05-04 21:17:42 +0000 |
commit | 325c9b321c8f8b63f777c96833e2f27c7695cabf (patch) | |
tree | 2d8ab75b5d9c1f751d6f326b3dfc1154c826558e /sound | |
parent | 9659a4b4ed705a0a82b2b52245e7c096536b78a1 (diff) | |
download | scummvm-rg350-325c9b321c8f8b63f777c96833e2f27c7695cabf.tar.gz scummvm-rg350-325c9b321c8f8b63f777c96833e2f27c7695cabf.tar.bz2 scummvm-rg350-325c9b321c8f8b63f777c96833e2f27c7695cabf.zip |
new fmopl (from adplug, which has it from mame; we can use it under the LGPL should we ever have to)
svn-id: r7328
Diffstat (limited to 'sound')
-rw-r--r-- | sound/fmopl.cpp | 2921 | ||||
-rw-r--r-- | sound/fmopl.h | 229 |
2 files changed, 2224 insertions, 926 deletions
diff --git a/sound/fmopl.cpp b/sound/fmopl.cpp index ef25721767..c10a6b6a32 100644 --- a/sound/fmopl.cpp +++ b/sound/fmopl.cpp @@ -1,101 +1,288 @@ -/* ScummVM - Scumm Interpreter - * Copyright (C) 1999-2000 Tatsuyuki Satoh - * Copyright (C) 2001-2003 The ScummVM project - * - * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * $Header$ - * - * LGPL licensed version of MAMEs fmopl (V0.37a modified) by - * Tatsuyuki Satoh. Included from LGPL'ed AdPlug. - */ - -#include "stdafx.h" +/* +** +** File: fmopl.c - software implementation of FM sound generator +** types OPL and OPL2 +** +** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmulator development +** Copyright (C) 2002 Jarek Burczynski +** +** Version 0.60 +** + +Revision History: + +04-28-2002 Jarek Burczynski: + - binary exact Envelope Generator (verified on real YM3812); + compared to YM2151: the EG clock is equal to internal_clock, + rates are 2 times slower and volume resolution is one bit less + - modified interface functions (they no longer return pointer - + that's internal to the emulator now): + - new wrapper functions for OPLCreate: YM3526Init(), YM3812Init() and Y8950Init() + - corrected 'off by one' error in feedback calculations (when feedback is off) + - enabled waveform usage (credit goes to Vlad Romascanu and zazzal22) + - speeded up noise generator calculations (Nicola Salmoria) + +03-24-2002 Jarek Burczynski (thanks to Dox for the YM3812 chip) + Complete rewrite (all verified on real YM3812): + - corrected sin_tab and tl_tab data + - corrected operator output calculations + - corrected waveform_select_enable register; + simply: ignore all writes to waveform_select register when + waveform_select_enable == 0 and do not change the waveform previously selected. + - corrected KSR handling + - corrected Envelope Generator: attack shape, Sustain mode and + Percussive/Non-percussive modes handling + - Envelope Generator rates are two times slower now + - LFO amplitude (tremolo) and phase modulation (vibrato) + - rhythm sounds phase generation + - white noise generator (big thanks to Olivier Galibert for mentioning Berlekamp-Massey algorithm) + - corrected key on/off handling (the 'key' signal is ORed from three sources: FM, rhythm and CSM) + - funky details (like ignoring output of operator 1 in BD rhythm sound when connect == 1) + +12-28-2001 Acho A. Tang + - reflected Delta-T EOS status on Y8950 status port. + - fixed subscription range of attack/decay tables + + + To do: + add delay before key off in CSM mode (see CSMKeyControll) + verify volume of the FM part on the Y8950 +*/ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdarg.h> #include <math.h> - #include "fmopl.h" -#include "common/engine.h" // for warning/error/debug - #ifndef PI #define PI 3.14159265358979323846 #endif -/* -------------------- preliminary define section --------------------- */ -/* attack/decay rate time rate */ -#define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ -#define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ - -#define FREQ_BITS 24 /* frequency turn */ +#ifdef _MSC_VER +# define INLINE __inline +#elif defined(__GNUC__) +# define INLINE inline +#else +# define INLINE +#endif -/* counter bits = 20 , octerve 7 */ -#define FREQ_RATE (1<<(FREQ_BITS-20)) -#define TL_BITS (FREQ_BITS+2) +/* output final shift */ +#if (OPL_SAMPLE_BITS==16) + #define FINAL_SH (0) + #define MAXOUT (+32767) + #define MINOUT (-32768) +#else + #define FINAL_SH (8) + #define MAXOUT (+127) + #define MINOUT (-128) +#endif -/* final output shift , limit minimum and maximum */ -#define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ -#define OPL_MAXOUT (0x7fff<<OPL_OUTSB) -#define OPL_MINOUT (-0x8000<<OPL_OUTSB) -/* -------------------- quality selection --------------------- */ +#define FREQ_SH 16 /* 16.16 fixed point (frequency calculations) */ +#define EG_SH 16 /* 16.16 fixed point (EG timing) */ +#define LFO_SH 24 /* 8.24 fixed point (LFO calculations) */ +#define TIMER_SH 16 /* 16.16 fixed point (timers calculations) */ -/* sinwave entries */ -/* used static memory = SIN_ENT * 4 (byte) */ -#define SIN_ENT 2048 +#define FREQ_MASK ((1<<FREQ_SH)-1) -/* output level entries (envelope,sinwave) */ -/* envelope counter lower bits */ -int ENV_BITS; /* envelope output entries */ -int EG_ENT; +#define ENV_BITS 10 +#define ENV_LEN (1<<ENV_BITS) +#define ENV_STEP (128.0/ENV_LEN) -/* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ -/* used static memory = EG_ENT*4 (byte) */ -int EG_OFF; /* OFF */ -int EG_DED; -int EG_DST; /* DECAY START */ -int EG_AED; -#define EG_AST 0 /* ATTACK START */ +#define MAX_ATT_INDEX ((1<<(ENV_BITS-1))-1) /*511*/ +#define MIN_ATT_INDEX (0) -#define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ +/* sinwave entries */ +#define SIN_BITS 10 +#define SIN_LEN (1<<SIN_BITS) +#define SIN_MASK (SIN_LEN-1) -/* LFO table entries */ -#define VIB_ENT 512 -#define VIB_SHIFT (32-9) -#define AMS_ENT 512 -#define AMS_SHIFT (32-9) +#define TL_RES_LEN (256) /* 8 bits addressing (real chip) */ -#define VIB_RATE 256 -/* -------------------- local defines , macros --------------------- */ /* register number to channel number , slot offset */ #define SLOT1 0 #define SLOT2 1 -/* envelope phase */ -#define ENV_MOD_RR 0x00 -#define ENV_MOD_DR 0x01 -#define ENV_MOD_AR 0x02 +/* Envelope Generator phases */ + +#define EG_ATT 4 +#define EG_DEC 3 +#define EG_SUS 2 +#define EG_REL 1 +#define EG_OFF 0 + + +/* save output as raw 16-bit sample */ + +/*#define SAVE_SAMPLE*/ + +#ifdef SAVE_SAMPLE +static FILE *sample[1]; + #if 1 /*save to MONO file */ + #define SAVE_ALL_CHANNELS \ + { signed int pom = lt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #else /*save to STEREO file */ + #define SAVE_ALL_CHANNELS \ + { signed int pom = lt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + pom = rt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #endif +#endif + +/* #define LOG_CYM_FILE */ +#ifdef LOG_CYM_FILE + FILE * cymfile = NULL; +#endif + + + +#define OPL_TYPE_WAVESEL 0x01 /* waveform select */ +#define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */ +#define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */ +#define OPL_TYPE_IO 0x08 /* I/O port */ + +/* ---------- Generic interface section ---------- */ +#define OPL_TYPE_YM3526 (0) +#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) +#define OPL_TYPE_Y8950 (OPL_TYPE_ADPCM|OPL_TYPE_KEYBOARD|OPL_TYPE_IO) + + + +/* Saving is necessary for member of the 'R' mark for suspend/resume */ + +typedef struct{ + UINT32 ar; /* attack rate: AR<<2 */ + UINT32 dr; /* decay rate: DR<<2 */ + UINT32 rr; /* release rate:RR<<2 */ + UINT8 KSR; /* key scale rate */ + UINT8 ksl; /* keyscale level */ + UINT8 ksr; /* key scale rate: kcode>>KSR */ + UINT8 mul; /* multiple: mul_tab[ML] */ + + /* Phase Generator */ + UINT32 Cnt; /* frequency counter */ + UINT32 Incr; /* frequency counter step */ + UINT8 FB; /* feedback shift value */ + INT32 *connect1; /* slot1 output pointer */ + INT32 op1_out[2]; /* slot1 output for feedback */ + UINT8 CON; /* connection (algorithm) type */ + + /* Envelope Generator */ + UINT8 eg_type; /* percussive/non-percussive mode */ + UINT8 state; /* phase type */ + UINT32 TL; /* total level: TL << 2 */ + INT32 TLL; /* adjusted now TL */ + INT32 volume; /* envelope counter */ + UINT32 sl; /* sustain level: sl_tab[SL] */ + + UINT8 eg_sh_ar; /* (attack state) */ + UINT8 eg_sel_ar; /* (attack state) */ + UINT8 eg_sh_dr; /* (decay state) */ + UINT8 eg_sel_dr; /* (decay state) */ + UINT8 eg_sh_rr; /* (release state) */ + UINT8 eg_sel_rr; /* (release state) */ + + UINT32 key; /* 0 = KEY OFF, >0 = KEY ON */ + + /* LFO */ + UINT32 AMmask; /* LFO Amplitude Modulation enable mask */ + UINT8 vib; /* LFO Phase Modulation enable flag (active high)*/ + + /* waveform select */ + unsigned int wavetable; +} OPL_SLOT; + +typedef struct{ + OPL_SLOT SLOT[2]; + /* phase generator state */ + UINT32 block_fnum; /* block+fnum */ + UINT32 fc; /* Freq. Increment base */ + UINT32 ksl_base; /* KeyScaleLevel Base step */ + UINT8 kcode; /* key code (for key scaling) */ +} OPL_CH; + +/* OPL state */ +typedef struct fm_opl_f { + /* FM channel slots */ + OPL_CH P_CH[9]; /* OPL/OPL2 chips have 9 channels*/ + + UINT32 eg_cnt; /* global envelope generator counter */ + UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/72 */ + UINT32 eg_timer_add; /* step of eg_timer */ + UINT32 eg_timer_overflow; /* envelope generator timer overlfows every 1 sample (on real chip) */ + + UINT8 rhythm; /* Rhythm mode */ + + UINT32 fn_tab[1024]; /* fnumber->increment counter */ + + /* LFO */ + UINT8 lfo_am_depth; + UINT8 lfo_pm_depth_range; + UINT32 lfo_am_cnt; + UINT32 lfo_am_inc; + UINT32 lfo_pm_cnt; + UINT32 lfo_pm_inc; + + UINT32 noise_rng; /* 23 bit noise shift register */ + UINT32 noise_p; /* current noise 'phase' */ + UINT32 noise_f; /* current noise period */ + + UINT8 wavesel; /* waveform select enable flag */ + + int T[2]; /* timer counters */ + UINT8 st[2]; /* timer enable */ + +#if BUILD_Y8950 + /* Delta-T ADPCM unit (Y8950) */ + + YM_DELTAT *deltat; + + /* Keyboard / I/O interface unit*/ + UINT8 portDirection; + UINT8 portLatch; + OPL_PORTHANDLER_R porthandler_r; + OPL_PORTHANDLER_W porthandler_w; + int port_param; + OPL_PORTHANDLER_R keyboardhandler_r; + OPL_PORTHANDLER_W keyboardhandler_w; + int keyboard_param; +#endif + + /* external event callback handlers */ + OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ + int TimerParam; /* TIMER parameter */ + OPL_IRQHANDLER IRQHandler; /* IRQ handler */ + int IRQParam; /* IRQ parameter */ + OPL_UPDATEHANDLER UpdateHandler;/* stream update handler */ + int UpdateParam; /* stream update parameter */ + + UINT8 type; /* chip type */ + UINT8 address; /* address register */ + UINT8 status; /* status flag */ + UINT8 statusmask; /* status mask */ + UINT8 mode; /* Reg.08 : CSM,notesel,etc. */ -/* -------------------- tables --------------------- */ + int clock; /* master clock (Hz) */ + int rate; /* sampling rate (Hz) */ + double freqbase; /* frequency base */ + double TimerBase; /* Timer base time (==sampling time)*/ +} FM_OPL; + + + +/* mapping of register number (offset) to slot number used by the emulator */ static const int slot_array[32]= { 0, 2, 4, 1, 3, 5,-1,-1, @@ -104,142 +291,325 @@ static const int slot_array[32]= -1,-1,-1,-1,-1,-1,-1,-1 }; -static uint KSL_TABLE[8 * 16]; - -static const double KSL_TABLE_SEED[8 * 16] = { +/* key scale level */ +/* table is 3dB/octave , DV converts this into 6dB/octave */ +/* 0.1875 is bit 0 weight of the envelope counter (volume) expressed in the 'decibel' scale */ +#define DV (0.1875/2.0) +#define KSL(x) (UINT32)(x/DV) +static const UINT32 ksl_tab[8*16]= +{ /* OCT 0 */ - 0.000, 0.000, 0.000, 0.000, - 0.000, 0.000, 0.000, 0.000, - 0.000, 0.000, 0.000, 0.000, - 0.000, 0.000, 0.000, 0.000, + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), /* OCT 1 */ - 0.000, 0.000, 0.000, 0.000, - 0.000, 0.000, 0.000, 0.000, - 0.000, 0.750, 1.125, 1.500, - 1.875, 2.250, 2.625, 3.000, + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(0.750), KSL(1.125), KSL(1.500), + KSL(1.875), KSL(2.250), KSL(2.625), KSL(3.000), /* OCT 2 */ - 0.000, 0.000, 0.000, 0.000, - 0.000, 1.125, 1.875, 2.625, - 3.000, 3.750, 4.125, 4.500, - 4.875, 5.250, 5.625, 6.000, + KSL(0.000), KSL(0.000), KSL(0.000), KSL(0.000), + KSL(0.000), KSL(1.125), KSL(1.875), KSL(2.625), + KSL(3.000), KSL(3.750), KSL(4.125), KSL(4.500), + KSL(4.875), KSL(5.250), KSL(5.625), KSL(6.000), /* OCT 3 */ - 0.000, 0.000, 0.000, 1.875, - 3.000, 4.125, 4.875, 5.625, - 6.000, 6.750, 7.125, 7.500, - 7.875, 8.250, 8.625, 9.000, + KSL(0.000), KSL(0.000), KSL(0.000), KSL(1.875), + KSL(3.000), KSL(4.125), KSL(4.875), KSL(5.625), + KSL(6.000), KSL(6.750), KSL(7.125), KSL(7.500), + KSL(7.875), KSL(8.250), KSL(8.625), KSL(9.000), /* OCT 4 */ - 0.000, 0.000, 3.000, 4.875, - 6.000, 7.125, 7.875, 8.625, - 9.000, 9.750, 10.125, 10.500, - 10.875, 11.250, 11.625, 12.000, + KSL(0.000), KSL(0.000), KSL(3.000), KSL(4.875), + KSL(6.000), KSL(7.125), KSL(7.875), KSL(8.625), + KSL(9.000), KSL(9.750),KSL(10.125),KSL(10.500), + KSL(10.875),KSL(11.250),KSL(11.625),KSL(12.000), /* OCT 5 */ - 0.000, 3.000, 6.000, 7.875, - 9.000, 10.125, 10.875, 11.625, - 12.000, 12.750, 13.125, 13.500, - 13.875, 14.250, 14.625, 15.000, + KSL(0.000), KSL(3.000), KSL(6.000), KSL(7.875), + KSL(9.000),KSL(10.125),KSL(10.875),KSL(11.625), + KSL(12.000),KSL(12.750),KSL(13.125),KSL(13.500), + KSL(13.875),KSL(14.250),KSL(14.625),KSL(15.000), /* OCT 6 */ - 0.000, 6.000, 9.000, 10.875, - 12.000, 13.125, 13.875, 14.625, - 15.000, 15.750, 16.125, 16.500, - 16.875, 17.250, 17.625, 18.000, + KSL(0.000), KSL(6.000), KSL(9.000),KSL(10.875), + KSL(12.000),KSL(13.125),KSL(13.875),KSL(14.625), + KSL(15.000),KSL(15.750),KSL(16.125),KSL(16.500), + KSL(16.875),KSL(17.250),KSL(17.625),KSL(18.000), /* OCT 7 */ - 0.000, 9.000, 12.000, 13.875, - 15.000, 16.125, 16.875, 17.625, - 18.000, 18.750, 19.125, 19.500, - 19.875, 20.250, 20.625, 21.000 + KSL(0.000), KSL(9.000),KSL(12.000),KSL(13.875), + KSL(15.000),KSL(16.125),KSL(16.875),KSL(17.625), + KSL(18.000),KSL(18.750),KSL(19.125),KSL(19.500), + KSL(19.875),KSL(20.250),KSL(20.625),KSL(21.000) }; +#undef DV +#undef KSL -/* sustain lebel table (3db per step) */ +/* sustain level table (3dB per step) */ /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ +#define SC(db) (UINT32) ( db * (2.0/ENV_STEP) ) +static const UINT32 sl_tab[16]={ + SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), + SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) +}; +#undef SC -static int SL_TABLE[16]; -static const uint SL_TABLE_SEED[16] = { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 31 +#define RATE_STEPS (8) +static const unsigned char eg_inc[15*RATE_STEPS]={ + +/*cycle:0 1 2 3 4 5 6 7*/ + +/* 0 */ 0,1, 0,1, 0,1, 0,1, /* rates 00..12 0 (increment by 0 or 1) */ +/* 1 */ 0,1, 0,1, 1,1, 0,1, /* rates 00..12 1 */ +/* 2 */ 0,1, 1,1, 0,1, 1,1, /* rates 00..12 2 */ +/* 3 */ 0,1, 1,1, 1,1, 1,1, /* rates 00..12 3 */ + +/* 4 */ 1,1, 1,1, 1,1, 1,1, /* rate 13 0 (increment by 1) */ +/* 5 */ 1,1, 1,2, 1,1, 1,2, /* rate 13 1 */ +/* 6 */ 1,2, 1,2, 1,2, 1,2, /* rate 13 2 */ +/* 7 */ 1,2, 2,2, 1,2, 2,2, /* rate 13 3 */ + +/* 8 */ 2,2, 2,2, 2,2, 2,2, /* rate 14 0 (increment by 2) */ +/* 9 */ 2,2, 2,4, 2,2, 2,4, /* rate 14 1 */ +/*10 */ 2,4, 2,4, 2,4, 2,4, /* rate 14 2 */ +/*11 */ 2,4, 4,4, 2,4, 4,4, /* rate 14 3 */ + +/*12 */ 4,4, 4,4, 4,4, 4,4, /* rates 15 0, 15 1, 15 2, 15 3 (increment by 4) */ +/*13 */ 8,8, 8,8, 8,8, 8,8, /* rates 15 2, 15 3 for attack */ +/*14 */ 0,0, 0,0, 0,0, 0,0, /* infinity rates for attack and decay(s) */ }; -#define TL_MAX (EG_ENT * 2) /* limit(tl + ksr + envelope) + sinwave */ -/* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ -/* TL_TABLE[ 0 to TL_MAX ] : plus section */ -/* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ -static int *TL_TABLE; -/* pointers to TL_TABLE with sinwave output offset */ -static int **SIN_TABLE; +#define O(a) (a*RATE_STEPS) + +/*note that there is no O(13) in this table - it's directly in the code */ +static const unsigned char eg_rate_select[16+64+16]={ /* Envelope Generator rates (16 + 64 rates + 16 RKS) */ +/* 16 dummy (infinite time) rates */ +O(14),O(14),O(14),O(14),O(14),O(14),O(14),O(14), +O(14),O(14),O(14),O(14),O(14),O(14),O(14),O(14), -/* LFO table */ -static int *AMS_TABLE; -static int *VIB_TABLE; +/* rates 00-12 */ +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), + +/* rate 13 */ +O( 4),O( 5),O( 6),O( 7), + +/* rate 14 */ +O( 8),O( 9),O(10),O(11), + +/* rate 15 */ +O(12),O(12),O(12),O(12), + +/* 16 dummy rates (same as 15 3) */ +O(12),O(12),O(12),O(12),O(12),O(12),O(12),O(12), +O(12),O(12),O(12),O(12),O(12),O(12),O(12),O(12), + +}; +#undef O + +//rate 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 +//shift 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0 +//mask 4095, 2047, 1023, 511, 255, 127, 63, 31, 15, 7, 3, 1, 0, 0, 0, 0 + +#define O(a) (a*1) +static const unsigned char eg_rate_shift[16+64+16]={ /* Envelope Generator counter shifts (16 + 64 rates + 16 RKS) */ +/* 16 infinite time rates */ +O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), +O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), + +/* rates 00-12 */ +O(12),O(12),O(12),O(12), +O(11),O(11),O(11),O(11), +O(10),O(10),O(10),O(10), +O( 9),O( 9),O( 9),O( 9), +O( 8),O( 8),O( 8),O( 8), +O( 7),O( 7),O( 7),O( 7), +O( 6),O( 6),O( 6),O( 6), +O( 5),O( 5),O( 5),O( 5), +O( 4),O( 4),O( 4),O( 4), +O( 3),O( 3),O( 3),O( 3), +O( 2),O( 2),O( 2),O( 2), +O( 1),O( 1),O( 1),O( 1), +O( 0),O( 0),O( 0),O( 0), + +/* rate 13 */ +O( 0),O( 0),O( 0),O( 0), + +/* rate 14 */ +O( 0),O( 0),O( 0),O( 0), + +/* rate 15 */ +O( 0),O( 0),O( 0),O( 0), + +/* 16 dummy rates (same as 15 3) */ +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0), +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0), + +}; +#undef O -/* envelope output curve table */ -/* attack + decay + OFF */ -//static int ENV_CURVE[2*EG_ENT+1]; -static int ENV_CURVE[2 * 4096 + 1]; // to keep it static ... /* multiple table */ -#define ML(a) (int)(a * 2) -static const uint MUL_TABLE[16]= { -/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ - ML(0.50), ML(1.00), ML(2.00), ML(3.00), ML(4.00), ML(5.00), ML(6.00), ML(7.00), - ML(8.00), ML(9.00), ML(10.00), ML(10.00),ML(12.00),ML(12.00),ML(15.00),ML(15.00) +#define ML(x) (UINT8)(x*2) +static const UINT8 mul_tab[16]= { +/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,10,12,12,15,15 */ + ML(0.50), ML(1.00), ML(2.00), ML(3.00), ML(4.00), ML(5.00), ML(6.00), ML(7.00), + ML(8.00), ML(9.00),ML(10.00),ML(10.00),ML(12.00),ML(12.00),ML(15.00),ML(15.00) }; #undef ML -/* dummy attack / decay rate ( when rate == 0 ) */ -static int RATE_0[16]= -{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; +/* TL_TAB_LEN is calculated as: +* 12 - sinus amplitude bits (Y axis) +* 2 - sinus sign bit (Y axis) +* TL_RES_LEN - sinus resolution (X axis) +*/ +#define TL_TAB_LEN (12*2*TL_RES_LEN) +static signed int tl_tab[TL_TAB_LEN]; + +#define ENV_QUIET (TL_TAB_LEN>>4) + +/* sin waveform table in 'decibel' scale */ +/* four waveforms on OPL2 type chips */ +static unsigned int sin_tab[SIN_LEN * 4]; + + +/* LFO Amplitude Modulation table (verified on real YM3812) + 27 output levels (triangle waveform); 1 level takes one of: 192, 256 or 448 samples + + Length: 210 elements. + + Each of the elements has to be repeated + exactly 64 times (on 64 consecutive samples). + The whole table takes: 64 * 210 = 13440 samples. + + When AM = 1 data is used directly + When AM = 0 data is divided by 4 before being used (loosing precision is important) +*/ + +#define LFO_AM_TAB_ELEMENTS 210 + +static const UINT8 lfo_am_table[LFO_AM_TAB_ELEMENTS] = { +0,0,0,0,0,0,0, +1,1,1,1, +2,2,2,2, +3,3,3,3, +4,4,4,4, +5,5,5,5, +6,6,6,6, +7,7,7,7, +8,8,8,8, +9,9,9,9, +10,10,10,10, +11,11,11,11, +12,12,12,12, +13,13,13,13, +14,14,14,14, +15,15,15,15, +16,16,16,16, +17,17,17,17, +18,18,18,18, +19,19,19,19, +20,20,20,20, +21,21,21,21, +22,22,22,22, +23,23,23,23, +24,24,24,24, +25,25,25,25, +26,26,26, +25,25,25,25, +24,24,24,24, +23,23,23,23, +22,22,22,22, +21,21,21,21, +20,20,20,20, +19,19,19,19, +18,18,18,18, +17,17,17,17, +16,16,16,16, +15,15,15,15, +14,14,14,14, +13,13,13,13, +12,12,12,12, +11,11,11,11, +10,10,10,10, +9,9,9,9, +8,8,8,8, +7,7,7,7, +6,6,6,6, +5,5,5,5, +4,4,4,4, +3,3,3,3, +2,2,2,2, +1,1,1,1 +}; + +/* LFO Phase Modulation table (verified on real YM3812) */ +static const INT8 lfo_pm_table[8*8*2] = { + +/* FNUM2/FNUM = 00 0xxxxxxx (0x0000) */ +0, 0, 0, 0, 0, 0, 0, 0, /*LFO PM depth = 0*/ +0, 0, 0, 0, 0, 0, 0, 0, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 00 1xxxxxxx (0x0080) */ +0, 0, 0, 0, 0, 0, 0, 0, /*LFO PM depth = 0*/ +1, 0, 0, 0,-1, 0, 0, 0, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 01 0xxxxxxx (0x0100) */ +1, 0, 0, 0,-1, 0, 0, 0, /*LFO PM depth = 0*/ +2, 1, 0,-1,-2,-1, 0, 1, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 01 1xxxxxxx (0x0180) */ +1, 0, 0, 0,-1, 0, 0, 0, /*LFO PM depth = 0*/ +3, 1, 0,-1,-3,-1, 0, 1, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 10 0xxxxxxx (0x0200) */ +2, 1, 0,-1,-2,-1, 0, 1, /*LFO PM depth = 0*/ +4, 2, 0,-2,-4,-2, 0, 2, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 10 1xxxxxxx (0x0280) */ +2, 1, 0,-1,-2,-1, 0, 1, /*LFO PM depth = 0*/ +5, 2, 0,-2,-5,-2, 0, 2, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 11 0xxxxxxx (0x0300) */ +3, 1, 0,-1,-3,-1, 0, 1, /*LFO PM depth = 0*/ +6, 3, 0,-3,-6,-3, 0, 3, /*LFO PM depth = 1*/ + +/* FNUM2/FNUM = 11 1xxxxxxx (0x0380) */ +3, 1, 0,-1,-3,-1, 0, 1, /*LFO PM depth = 0*/ +7, 3, 0,-3,-7,-3, 0, 3 /*LFO PM depth = 1*/ +}; -/* -------------------- static state --------------------- */ /* lock level of common table */ static int num_lock = 0; /* work table */ static void *cur_chip = NULL; /* current chip point */ -/* currenct chip state */ -/* static OPLSAMPLE *bufL,*bufR; */ -static OPL_CH *S_CH; -static OPL_CH *E_CH; -OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2; - -static int outd[1]; -static int ams; -static int vib; -int *ams_table; -int *vib_table; -static int amsIncr; -static int vibIncr; -static int feedback2; /* connect for SLOT 2 */ - -/* --------------------- rebuild tables ------------------- */ - -#define SC_KSL(mydb) ((uint) (mydb / (EG_STEP / 2))) -#define SC_SL(db) (int)(db * ((3 / EG_STEP) * (1 << ENV_BITS))) + EG_DST - -void OPLBuildTables(int ENV_BITS_PARAM, int EG_ENT_PARAM) { - int i; +OPL_SLOT *SLOT7_1,*SLOT7_2,*SLOT8_1,*SLOT8_2; - ENV_BITS = ENV_BITS_PARAM; - EG_ENT = EG_ENT_PARAM; - EG_OFF = ((2 * EG_ENT)<<ENV_BITS); /* OFF */ - EG_DED = EG_OFF; - EG_DST = (EG_ENT << ENV_BITS); /* DECAY START */ - EG_AED = EG_DST; - //EG_STEP = (96.0/EG_ENT); +static signed int phase_modulation; /* phase modulation input (SLOT 2) */ +static signed int output[1]; - for (i = 0; i < (int)(sizeof(KSL_TABLE_SEED) / sizeof(double)); i++) - KSL_TABLE[i] = SC_KSL(KSL_TABLE_SEED[i]); +#if BUILD_Y8950 +static INT32 output_deltat[4]; /* for Y8950 DELTA-T */ +#endif - for (i = 0; i < (int)(sizeof(SL_TABLE_SEED) / sizeof(uint)); i++) - SL_TABLE[i] = SC_SL(SL_TABLE_SEED[i]); -} +static UINT32 LFO_AM; +static INT32 LFO_PM; -#undef SC_KSL -#undef SC_SL -/* --------------------- subroutines --------------------- */ -inline int Limit(int val, int max, int min) { +INLINE int limit( int val, int max, int min ) { if ( val > max ) val = max; else if ( val < min ) @@ -248,26 +618,32 @@ inline int Limit(int val, int max, int min) { return val; } + /* status set and IRQ handling */ -inline void OPL_STATUS_SET(FM_OPL *OPL, int flag) { +INLINE void OPL_STATUS_SET(FM_OPL *OPL,int flag) +{ /* set status flag */ OPL->status |= flag; - if(!(OPL->status & 0x80)) { - if(OPL->status & OPL->statusmask) { /* IRQ on */ + if(!(OPL->status & 0x80)) + { + if(OPL->status & OPL->statusmask) + { /* IRQ on */ OPL->status |= 0x80; /* callback user interrupt handler (IRQ is OFF to ON) */ - if(OPL->IRQHandler) - (OPL->IRQHandler)(OPL->IRQParam,1); + if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); } } } /* status reset and IRQ handling */ -inline void OPL_STATUS_RESET(FM_OPL *OPL, int flag) { +INLINE void OPL_STATUS_RESET(FM_OPL *OPL,int flag) +{ /* reset status flag */ - OPL->status &= ~flag; - if((OPL->status & 0x80)) { - if (!(OPL->status & OPL->statusmask)) { + OPL->status &=~flag; + if((OPL->status & 0x80)) + { + if (!(OPL->status & OPL->statusmask) ) + { OPL->status &= 0x7f; /* callback user interrupt handler (IRQ is ON to OFF) */ if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); @@ -276,771 +652,1182 @@ inline void OPL_STATUS_RESET(FM_OPL *OPL, int flag) { } /* IRQ mask set */ -inline void OPL_STATUSMASK_SET(FM_OPL *OPL, int flag) { +INLINE void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) +{ OPL->statusmask = flag; /* IRQ handling check */ OPL_STATUS_SET(OPL,0); OPL_STATUS_RESET(OPL,0); } -/* ----- key on ----- */ -inline void OPL_KEYON(OPL_SLOT *SLOT) { - /* sin wave restart */ - SLOT->Cnt = 0; - /* set attack */ - SLOT->evm = ENV_MOD_AR; - SLOT->evs = SLOT->evsa; - SLOT->evc = EG_AST; - SLOT->eve = EG_AED; -} -/* ----- key off ----- */ -inline void OPL_KEYOFF(OPL_SLOT *SLOT) { - if( SLOT->evm > ENV_MOD_RR) { - /* set envelope counter from envleope output */ - SLOT->evm = ENV_MOD_RR; - if( !(SLOT->evc & EG_DST) ) - //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; - SLOT->evc = EG_DST; - SLOT->eve = EG_DED; - SLOT->evs = SLOT->evsr; - } + +/* advance LFO to next sample */ +INLINE void advance_lfo(FM_OPL *OPL) +{ + UINT8 tmp; + + /* LFO */ + OPL->lfo_am_cnt += OPL->lfo_am_inc; + if (OPL->lfo_am_cnt >= (UINT32)(LFO_AM_TAB_ELEMENTS<<LFO_SH) ) /* lfo_am_table is 210 elements long */ + OPL->lfo_am_cnt -= (UINT32)(LFO_AM_TAB_ELEMENTS<<LFO_SH); + + tmp = lfo_am_table[ OPL->lfo_am_cnt >> LFO_SH ]; + + if (OPL->lfo_am_depth) + LFO_AM = tmp; + else + LFO_AM = tmp>>2; + + OPL->lfo_pm_cnt += OPL->lfo_pm_inc; + LFO_PM = ((OPL->lfo_pm_cnt>>LFO_SH) & 7) | OPL->lfo_pm_depth_range; } -/* ---------- calcrate Envelope Generator & Phase Generator ---------- */ -/* return : envelope output */ -inline uint OPL_CALC_SLOT(OPL_SLOT *SLOT) { - /* calcrate envelope generator */ - if((SLOT->evc += SLOT->evs) >= SLOT->eve) { - switch( SLOT->evm ){ - case ENV_MOD_AR: /* ATTACK -> DECAY1 */ - /* next DR */ - SLOT->evm = ENV_MOD_DR; - SLOT->evc = EG_DST; - SLOT->eve = SLOT->SL; - SLOT->evs = SLOT->evsd; - break; - case ENV_MOD_DR: /* DECAY -> SL or RR */ - SLOT->evc = SLOT->SL; - SLOT->eve = EG_DED; - if(SLOT->eg_typ) { - SLOT->evs = 0; - } else { - SLOT->evm = ENV_MOD_RR; - SLOT->evs = SLOT->evsr; +/* advance to next sample */ +INLINE void advancex(FM_OPL *OPL) +{ + OPL_CH *CH; + OPL_SLOT *op; + int i; + + OPL->eg_timer += OPL->eg_timer_add; + + while (OPL->eg_timer >= OPL->eg_timer_overflow) + { + OPL->eg_timer -= OPL->eg_timer_overflow; + + OPL->eg_cnt++; + + for (i=0; i<9*2; i++) + { + CH = &OPL->P_CH[i/2]; + op = &CH->SLOT[i&1]; + + /* Envelope Generator */ + switch(op->state) + { + case EG_ATT: /* attack phase */ + { + + if ( !(OPL->eg_cnt & ((1<<op->eg_sh_ar)-1) ) ) + { + op->volume += (~op->volume * + (eg_inc[op->eg_sel_ar + ((OPL->eg_cnt>>op->eg_sh_ar)&7)]) + ) >>3; + + if (op->volume <= MIN_ATT_INDEX) + { + op->volume = MIN_ATT_INDEX; + op->state = EG_DEC; + } + + } + } break; - case ENV_MOD_RR: /* RR -> OFF */ - SLOT->evc = EG_OFF; - SLOT->eve = EG_OFF + 1; - SLOT->evs = 0; + + case EG_DEC: /* decay phase */ + if ( !(OPL->eg_cnt & ((1<<op->eg_sh_dr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_dr + ((OPL->eg_cnt>>op->eg_sh_dr)&7)]; + + if ( op->volume >= (INT32)op->sl ) + op->state = EG_SUS; + + } + break; + + case EG_SUS: /* sustain phase */ + + /* this is important behaviour: + one can change percusive/non-percussive modes on the fly and + the chip will remain in sustain phase - verified on real YM3812 */ + + if(op->eg_type) /* non-percussive mode */ + { + /* do nothing */ + } + else /* percussive mode */ + { + /* during sustain phase chip adds Release Rate (in percussive mode) */ + if ( !(OPL->eg_cnt & ((1<<op->eg_sh_rr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rr + ((OPL->eg_cnt>>op->eg_sh_rr)&7)]; + + if ( op->volume >= MAX_ATT_INDEX ) + op->volume = MAX_ATT_INDEX; + } + /* else do nothing in sustain phase */ + } break; + + case EG_REL: /* release phase */ + if ( !(OPL->eg_cnt & ((1<<op->eg_sh_rr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rr + ((OPL->eg_cnt>>op->eg_sh_rr)&7)]; + + if ( op->volume >= MAX_ATT_INDEX ) + { + op->volume = MAX_ATT_INDEX; + op->state = EG_OFF; + } + + } + break; + + default: + break; + } } } - /* calcrate envelope */ - return SLOT->TLL + ENV_CURVE[SLOT->evc>>ENV_BITS] + (SLOT->ams ? ams : 0); -} -/* set algorythm connection */ -static void set_algorythm(OPL_CH *CH) { - int *carrier = &outd[0]; - CH->connect1 = CH->CON ? carrier : &feedback2; - CH->connect2 = carrier; -} + for (i=0; i<9*2; i++) + { + CH = &OPL->P_CH[i/2]; + op = &CH->SLOT[i&1]; -/* ---------- frequency counter for operater update ---------- */ -inline void CALC_FCSLOT(OPL_CH *CH, OPL_SLOT *SLOT) { - int ksr; + /* Phase Generator */ + if(op->vib) + { + UINT8 block; + UINT32 block_fnum = CH->block_fnum; - /* frequency step counter */ - SLOT->Incr = CH->fc * SLOT->mul; - ksr = CH->kcode >> SLOT->KSR; + unsigned int fnum_lfo = (block_fnum&0x0380) >> 7; - if( SLOT->ksr != ksr ) + signed int lfo_fn_table_index_offset = lfo_pm_table[LFO_PM + 16*fnum_lfo ]; + + if (lfo_fn_table_index_offset) /* LFO phase modulation active */ + { + block_fnum += lfo_fn_table_index_offset; + block = (block_fnum&0x1c00) >> 10; + op->Cnt += (OPL->fn_tab[block_fnum&0x03ff] >> (7-block)) * op->mul;//ok + } + else /* LFO phase modulation = zero */ + { + op->Cnt += op->Incr; + } + } + else /* LFO phase modulation disabled for this operator */ + { + op->Cnt += op->Incr; + } + } + + /* The Noise Generator of the YM3812 is 23-bit shift register. + * Period is equal to 2^23-2 samples. + * Register works at sampling frequency of the chip, so output + * can change on every sample. + * + * Output of the register and input to the bit 22 is: + * bit0 XOR bit14 XOR bit15 XOR bit22 + * + * Simply use bit 22 as the noise output. + */ + + OPL->noise_p += OPL->noise_f; + i = OPL->noise_p >> FREQ_SH; /* number of events (shifts of the shift register) */ + OPL->noise_p &= FREQ_MASK; + while (i) { - SLOT->ksr = ksr; - /* attack , decay rate recalcration */ - SLOT->evsa = SLOT->AR[ksr]; - SLOT->evsd = SLOT->DR[ksr]; - SLOT->evsr = SLOT->RR[ksr]; + /* + UINT32 j; + j = ( (OPL->noise_rng) ^ (OPL->noise_rng>>14) ^ (OPL->noise_rng>>15) ^ (OPL->noise_rng>>22) ) & 1; + OPL->noise_rng = (j<<22) | (OPL->noise_rng>>1); + */ + + /* + Instead of doing all the logic operations above, we + use a trick here (and use bit 0 as the noise output). + The difference is only that the noise bit changes one + step ahead. This doesn't matter since we don't know + what is real state of the noise_rng after the reset. + */ + + if (OPL->noise_rng & 1) OPL->noise_rng ^= 0x800302; + OPL->noise_rng >>= 1; + + i--; } - SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); } -/* set multi,am,vib,EG-TYP,KSR,mul */ -inline void set_mul(FM_OPL *OPL, int slot, int v) { - OPL_CH *CH = &OPL->P_CH[slot / 2]; - OPL_SLOT *SLOT = &CH->SLOT[slot & 1]; - SLOT->mul = MUL_TABLE[v & 0x0f]; - SLOT->KSR = (v & 0x10) ? 0 : 2; - SLOT->eg_typ = (v & 0x20) >> 5; - SLOT->vib = (v & 0x40); - SLOT->ams = (v & 0x80); - CALC_FCSLOT(CH, SLOT); +INLINE signed int op_calc(UINT32 phase, unsigned int env, signed int pm, unsigned int wave_tab) +{ + UINT32 p; + + p = (env<<4) + sin_tab[wave_tab + ((((signed int)((phase & ~FREQ_MASK) + (pm<<16))) >> FREQ_SH ) & SIN_MASK) ]; + + if (p >= TL_TAB_LEN) + return 0; + return tl_tab[p]; } -/* set ksl & tl */ -inline void set_ksl_tl(FM_OPL *OPL, int slot, int v) { - OPL_CH *CH = &OPL->P_CH[slot / 2]; - OPL_SLOT *SLOT = &CH->SLOT[slot & 1]; - int ksl = v >> 6; /* 0 / 1.5 / 3 / 6 db/OCT */ +INLINE signed int op_calc1(UINT32 phase, unsigned int env, signed int pm, unsigned int wave_tab) +{ + UINT32 p; + INT32 i; - SLOT->ksl = ksl ? 3-ksl : 31; - SLOT->TL = (int)((v & 0x3f) * (0.75 / EG_STEP)); /* 0.75db step */ + i = (phase & ~FREQ_MASK) + pm; - if(!(OPL->mode & 0x80)) { /* not CSM latch total level */ - SLOT->TLL = SLOT->TL + (CH->ksl_base >> SLOT->ksl); - } -} +/*logerror("i=%08x (i>>16)&511=%8i phase=%i [pm=%08x] ",i, (i>>16)&511, phase>>FREQ_SH, pm);*/ -/* set attack rate & decay rate */ -inline void set_ar_dr(FM_OPL *OPL, int slot, int v) { - OPL_CH *CH = &OPL->P_CH[slot / 2]; - OPL_SLOT *SLOT = &CH->SLOT[slot & 1]; - int ar = v >> 4; - int dr = v & 0x0f; + p = (env<<4) + sin_tab[ wave_tab + ((i>>FREQ_SH) & SIN_MASK)]; - SLOT->AR = ar ? &OPL->AR_TABLE[ar << 2] : RATE_0; - SLOT->evsa = SLOT->AR[SLOT->ksr]; - if(SLOT->evm == ENV_MOD_AR) - SLOT->evs = SLOT->evsa; +/*logerror("(p&255=%i p>>8=%i) out= %i\n", p&255,p>>8, tl_tab[p&255]>>(p>>8) );*/ - SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; - SLOT->evsd = SLOT->DR[SLOT->ksr]; - if(SLOT->evm == ENV_MOD_DR) - SLOT->evs = SLOT->evsd; + if (p >= TL_TAB_LEN) + return 0; + return tl_tab[p]; } -/* set sustain level & release rate */ -inline void set_sl_rr(FM_OPL *OPL, int slot, int v) { - OPL_CH *CH = &OPL->P_CH[slot / 2]; - OPL_SLOT *SLOT = &CH->SLOT[slot & 1]; - int sl = v >> 4; - int rr = v & 0x0f; - - SLOT->SL = SL_TABLE[sl]; - if(SLOT->evm == ENV_MOD_DR) - SLOT->eve = SLOT->SL; - SLOT->RR = &OPL->DR_TABLE[rr<<2]; - SLOT->evsr = SLOT->RR[SLOT->ksr]; - if(SLOT->evm == ENV_MOD_RR) - SLOT->evs = SLOT->evsr; -} - -/* operator output calcrator */ -#define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt + con) / (0x1000000 / SIN_ENT)) & (SIN_ENT-1)][env] -/* ---------- calcrate one of channel ---------- */ -inline void OPL_CALC_CH(OPL_CH *CH) { - uint env_out; + +#define volume_calc(OP) ((OP)->TLL + ((UINT32)(OP)->volume) + (LFO_AM & (OP)->AMmask)) + +/* calculate output */ +INLINE void OPL_CALC_CH( OPL_CH *CH ) +{ OPL_SLOT *SLOT; + unsigned int env; + signed int out; + + phase_modulation = 0; - feedback2 = 0; /* SLOT 1 */ SLOT = &CH->SLOT[SLOT1]; - env_out=OPL_CALC_SLOT(SLOT); - if(env_out < (uint)(EG_ENT - 1)) { - /* PG */ - if(SLOT->vib) - SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE); - else - SLOT->Cnt += SLOT->Incr; - /* connectoion */ - if(CH->FB) { - int feedback1 = (CH->op1_out[0] + CH->op1_out[1]) >> CH->FB; - CH->op1_out[1] = CH->op1_out[0]; - *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT, env_out, feedback1); - } - else { - *CH->connect1 += OP_OUT(SLOT, env_out, 0); - } - }else { - CH->op1_out[1] = CH->op1_out[0]; - CH->op1_out[0] = 0; + env = volume_calc(SLOT); + out = SLOT->op1_out[0] + SLOT->op1_out[1]; + SLOT->op1_out[0] = SLOT->op1_out[1]; + *SLOT->connect1 += SLOT->op1_out[0]; + SLOT->op1_out[1] = 0; + if( env < ENV_QUIET ) + { + if (!SLOT->FB) + out = 0; + SLOT->op1_out[1] = op_calc1(SLOT->Cnt, env, (out<<SLOT->FB), SLOT->wavetable ); } + /* SLOT 2 */ - SLOT = &CH->SLOT[SLOT2]; - env_out=OPL_CALC_SLOT(SLOT); - if(env_out < (uint)(EG_ENT - 1)) { - /* PG */ - if(SLOT->vib) - SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE); - else - SLOT->Cnt += SLOT->Incr; - /* connectoion */ - outd[0] += OP_OUT(SLOT, env_out, feedback2); - } + SLOT++; + env = volume_calc(SLOT); + if( env < ENV_QUIET ) + output[0] += op_calc(SLOT->Cnt, env, phase_modulation, SLOT->wavetable); } -/* ---------- calcrate rythm block ---------- */ -#define WHITE_NOISE_db 6.0 -inline void OPL_CALC_RH(OPL_CH *CH) { - uint env_tam, env_sd, env_top, env_hh; - int whitenoise = int((rand()&1) * (WHITE_NOISE_db / EG_STEP)); - int tone8; +/* + operators used in the rhythm sounds generation process: + + Envelope Generator: + +channel operator register number Bass High Snare Tom Top +/ slot number TL ARDR SLRR Wave Drum Hat Drum Tom Cymbal + 6 / 0 12 50 70 90 f0 + + 6 / 1 15 53 73 93 f3 + + 7 / 0 13 51 71 91 f1 + + 7 / 1 16 54 74 94 f4 + + 8 / 0 14 52 72 92 f2 + + 8 / 1 17 55 75 95 f5 + + + Phase Generator: + +channel operator register number Bass High Snare Tom Top +/ slot number MULTIPLE Drum Hat Drum Tom Cymbal + 6 / 0 12 30 + + 6 / 1 15 33 + + 7 / 0 13 31 + + + + 7 / 1 16 34 ----- n o t u s e d ----- + 8 / 0 14 32 + + 8 / 1 17 35 + + +channel operator register number Bass High Snare Tom Top +number number BLK/FNUM2 FNUM Drum Hat Drum Tom Cymbal + 6 12,15 B6 A6 + + + 7 13,16 B7 A7 + + + + + 8 14,17 B8 A8 + + + + +*/ + +/* calculate rhythm */ + +INLINE void OPL_CALC_RH( OPL_CH *CH, unsigned int noise ) +{ OPL_SLOT *SLOT; - int env_out; + signed int out; + unsigned int env; - /* BD : same as FM serial mode and output level is large */ - feedback2 = 0; + + /* Bass Drum (verified on real YM3812): + - depends on the channel 6 'connect' register: + when connect = 0 it works the same as in normal (non-rhythm) mode (op1->op2->out) + when connect = 1 _only_ operator 2 is present on output (op2->out), operator 1 is ignored + - output sample always is multiplied by 2 + */ + + phase_modulation = 0; /* SLOT 1 */ SLOT = &CH[6].SLOT[SLOT1]; - env_out = OPL_CALC_SLOT(SLOT); - if(env_out < EG_ENT-1) { - /* PG */ - if(SLOT->vib) - SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE); - else - SLOT->Cnt += SLOT->Incr; - /* connectoion */ - if(CH[6].FB) { - int feedback1 = (CH[6].op1_out[0] + CH[6].op1_out[1]) >> CH[6].FB; - CH[6].op1_out[1] = CH[6].op1_out[0]; - feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT, env_out, feedback1); - } - else { - feedback2 = OP_OUT(SLOT, env_out, 0); - } - }else { - feedback2 = 0; - CH[6].op1_out[1] = CH[6].op1_out[0]; - CH[6].op1_out[0] = 0; + env = volume_calc(SLOT); + + out = SLOT->op1_out[0] + SLOT->op1_out[1]; + SLOT->op1_out[0] = SLOT->op1_out[1]; + + if (!SLOT->CON) + phase_modulation = SLOT->op1_out[0]; + //else ignore output of operator 1 + + SLOT->op1_out[1] = 0; + if( env < ENV_QUIET ) + { + if (!SLOT->FB) + out = 0; + SLOT->op1_out[1] = op_calc1(SLOT->Cnt, env, (out<<SLOT->FB), SLOT->wavetable ); } + /* SLOT 2 */ - SLOT = &CH[6].SLOT[SLOT2]; - env_out = OPL_CALC_SLOT(SLOT); - if(env_out < EG_ENT-1) { - /* PG */ - if(SLOT->vib) - SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE); + SLOT++; + env = volume_calc(SLOT); + if( env < ENV_QUIET ) + output[0] += op_calc(SLOT->Cnt, env, phase_modulation, SLOT->wavetable) * 2; + + + /* Phase generation is based on: */ + // HH (13) channel 7->slot 1 combined with channel 8->slot 2 (same combination as TOP CYMBAL but different output phases) + // SD (16) channel 7->slot 1 + // TOM (14) channel 8->slot 1 + // TOP (17) channel 7->slot 1 combined with channel 8->slot 2 (same combination as HIGH HAT but different output phases) + + /* Envelope generation based on: */ + // HH channel 7->slot1 + // SD channel 7->slot2 + // TOM channel 8->slot1 + // TOP channel 8->slot2 + + + /* The following formulas can be well optimized. + I leave them in direct form for now (in case I've missed something). + */ + + /* High Hat (verified on real YM3812) */ + env = volume_calc(SLOT7_1); + if( env < ENV_QUIET ) + { + + /* high hat phase generation: + phase = d0 or 234 (based on frequency only) + phase = 34 or 2d0 (based on noise) + */ + + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit7 = ((SLOT7_1->Cnt>>FREQ_SH)>>7)&1; + unsigned char bit3 = ((SLOT7_1->Cnt>>FREQ_SH)>>3)&1; + unsigned char bit2 = ((SLOT7_1->Cnt>>FREQ_SH)>>2)&1; + + unsigned char res1 = (bit2 ^ bit7) | bit3; + + /* when res1 = 0 phase = 0x000 | 0xd0; */ + /* when res1 = 1 phase = 0x200 | (0xd0>>2); */ + UINT32 phase = res1 ? (0x200|(0xd0>>2)) : 0xd0; + + /* enable gate based on frequency of operator 2 in channel 8 */ + unsigned char bit5e= ((SLOT8_2->Cnt>>FREQ_SH)>>5)&1; + unsigned char bit3e= ((SLOT8_2->Cnt>>FREQ_SH)>>3)&1; + + unsigned char res2 = (bit3e ^ bit5e); + + /* when res2 = 0 pass the phase from calculation above (res1); */ + /* when res2 = 1 phase = 0x200 | (0xd0>>2); */ + if (res2) + phase = (0x200|(0xd0>>2)); + + + /* when phase & 0x200 is set and noise=1 then phase = 0x200|0xd0 */ + /* when phase & 0x200 is set and noise=0 then phase = 0x200|(0xd0>>2), ie no change */ + if (phase&0x200) + { + if (noise) + phase = 0x200|0xd0; + } else - SLOT->Cnt += SLOT->Incr; - /* connectoion */ - outd[0] += OP_OUT(SLOT, env_out, feedback2) * 2; + /* when phase & 0x200 is clear and noise=1 then phase = 0xd0>>2 */ + /* when phase & 0x200 is clear and noise=0 then phase = 0xd0, ie no change */ + { + if (noise) + phase = 0xd0>>2; + } + + output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_1->wavetable) * 2; } - // SD (17) = mul14[fnum7] + white noise - // TAM (15) = mul15[fnum8] - // TOP (18) = fnum6(mul18[fnum8]+whitenoise) - // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise - env_sd = OPL_CALC_SLOT(SLOT7_2) + whitenoise; - env_tam =OPL_CALC_SLOT(SLOT8_1); - env_top = OPL_CALC_SLOT(SLOT8_2); - env_hh = OPL_CALC_SLOT(SLOT7_1) + whitenoise; - - /* PG */ - if(SLOT7_1->vib) - SLOT7_1->Cnt += (2 * SLOT7_1->Incr * vib / VIB_RATE); - else - SLOT7_1->Cnt += 2 * SLOT7_1->Incr; - if(SLOT7_2->vib) - SLOT7_2->Cnt += ((CH[7].fc * 8) * vib / VIB_RATE); - else - SLOT7_2->Cnt += (CH[7].fc * 8); - if(SLOT8_1->vib) - SLOT8_1->Cnt += (SLOT8_1->Incr * vib / VIB_RATE); - else - SLOT8_1->Cnt += SLOT8_1->Incr; - if(SLOT8_2->vib) - SLOT8_2->Cnt += ((CH[8].fc * 48) * vib / VIB_RATE); - else - SLOT8_2->Cnt += (CH[8].fc * 48); - - tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); - - /* SD */ - if(env_sd < (uint)(EG_ENT - 1)) - outd[0] += OP_OUT(SLOT7_1, env_sd, 0) * 8; - /* TAM */ - if(env_tam < (uint)(EG_ENT - 1)) - outd[0] += OP_OUT(SLOT8_1, env_tam, 0) * 2; - /* TOP-CY */ - if(env_top < (uint)(EG_ENT - 1)) - outd[0] += OP_OUT(SLOT7_2, env_top, tone8) * 2; - /* HH */ - if(env_hh < (uint)(EG_ENT-1)) - outd[0] += OP_OUT(SLOT7_2, env_hh, tone8) * 2; -} - -/* ----------- initialize time tabls ----------- */ -static void init_timetables(FM_OPL *OPL, int ARRATE, int DRRATE) { - int i; - double rate; - - /* make attack rate & decay rate tables */ - for (i = 0; i < 4; i++) - OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; - for (i = 4; i <= 60; i++){ - rate = OPL->freqbase; /* frequency rate */ - if(i < 60) - rate *= 1.0 + (i & 3) * 0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ - rate *= 1 << ((i >> 2) - 1); /* b2-5 : shift bit */ - rate *= (double)(EG_ENT << ENV_BITS); - OPL->AR_TABLE[i] = (int)(rate / ARRATE); - OPL->DR_TABLE[i] = (int)(rate / DRRATE); + /* Snare Drum (verified on real YM3812) */ + env = volume_calc(SLOT7_2); + if( env < ENV_QUIET ) + { + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit8 = ((SLOT7_1->Cnt>>FREQ_SH)>>8)&1; + + /* when bit8 = 0 phase = 0x100; */ + /* when bit8 = 1 phase = 0x200; */ + UINT32 phase = bit8 ? 0x200 : 0x100; + + /* Noise bit XOR'es phase by 0x100 */ + /* when noisebit = 0 pass the phase from calculation above */ + /* when noisebit = 1 phase ^= 0x100; */ + /* in other words: phase ^= (noisebit<<8); */ + if (noise) + phase ^= 0x100; + + output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_1->wavetable) * 2; } - for (i = 60; i < 75; i++) { - OPL->AR_TABLE[i] = EG_AED-1; - OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; + + /* Tom Tom (verified on real YM3812) */ + env = volume_calc(SLOT8_1); + if( env < ENV_QUIET ) + output[0] += op_calc(SLOT8_1->Cnt, env, 0, SLOT8_1->wavetable) * 2; + + /* Top Cymbal (verified on real YM3812) */ + env = volume_calc(SLOT8_2); + if( env < ENV_QUIET ) + { + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit7 = ((SLOT7_1->Cnt>>FREQ_SH)>>7)&1; + unsigned char bit3 = ((SLOT7_1->Cnt>>FREQ_SH)>>3)&1; + unsigned char bit2 = ((SLOT7_1->Cnt>>FREQ_SH)>>2)&1; + + unsigned char res1 = (bit2 ^ bit7) | bit3; + + /* when res1 = 0 phase = 0x000 | 0x100; */ + /* when res1 = 1 phase = 0x200 | 0x100; */ + UINT32 phase = res1 ? 0x300 : 0x100; + + /* enable gate based on frequency of operator 2 in channel 8 */ + unsigned char bit5e= ((SLOT8_2->Cnt>>FREQ_SH)>>5)&1; + unsigned char bit3e= ((SLOT8_2->Cnt>>FREQ_SH)>>3)&1; + + unsigned char res2 = (bit3e ^ bit5e); + /* when res2 = 0 pass the phase from calculation above (res1); */ + /* when res2 = 1 phase = 0x200 | 0x100; */ + if (res2) + phase = 0x300; + + output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT8_2->wavetable) * 2; } + } -/* ---------- generic table initialize ---------- */ -static int OPLOpenTable(void) { - int s,t; - double rate; - int i,j; - double pom; - /* allocate dynamic tables */ - if((TL_TABLE = (int *)malloc(TL_MAX * 2 * sizeof(int))) == NULL) - return 0; - if((SIN_TABLE = (int **)malloc(SIN_ENT * 4 * sizeof(int *))) == NULL) { - free(TL_TABLE); - return 0; - } - if((AMS_TABLE = (int *)malloc(AMS_ENT * 2 * sizeof(int))) == NULL) { - free(TL_TABLE); - free(SIN_TABLE); - return 0; +/* generic table initialize */ +static int init_tables(void) +{ + signed int i,x; + signed int n; + double o,m; + + + for (x=0; x<TL_RES_LEN; x++) + { + m = (1<<16) / pow(2, (x+1) * (ENV_STEP/4.0) / 8.0); + m = floor(m); + + /* we never reach (1<<16) here due to the (x+1) */ + /* result fits within 16 bits at maximum */ + + n = (int)m; /* 16 bits here */ + n >>= 4; /* 12 bits here */ + if (n&1) /* round to nearest */ + n = (n>>1)+1; + else + n = n>>1; + /* 11 bits here (rounded) */ + n <<= 1; /* 12 bits here (as in real chip) */ + tl_tab[ x*2 + 0 ] = n; + tl_tab[ x*2 + 1 ] = -tl_tab[ x*2 + 0 ]; + + for (i=1; i<12; i++) + { + tl_tab[ x*2+0 + i*2*TL_RES_LEN ] = tl_tab[ x*2+0 ]>>i; + tl_tab[ x*2+1 + i*2*TL_RES_LEN ] = -tl_tab[ x*2+0 + i*2*TL_RES_LEN ]; + } + #if 0 + logerror("tl %04i", x*2); + for (i=0; i<12; i++) + logerror(", [%02i] %5i", i*2, tl_tab[ x*2 /*+1*/ + i*2*TL_RES_LEN ] ); + logerror("\n"); + #endif } - if((VIB_TABLE = (int *)malloc(VIB_ENT * 2 * sizeof(int))) == NULL) { - free(TL_TABLE); - free(SIN_TABLE); - free(AMS_TABLE); - return 0; + /*logerror("FMOPL.C: TL_TAB_LEN = %i elements (%i bytes)\n",TL_TAB_LEN, (int)sizeof(tl_tab));*/ + + + for (i=0; i<SIN_LEN; i++) + { + /* non-standard sinus */ + m = sin( ((i*2)+1) * PI / SIN_LEN ); /* checked against the real chip */ + + /* we never reach zero here due to ((i*2)+1) */ + + if (m>0.0) + o = 8*log(1.0/m)/log(2); /* convert to 'decibels' */ + else + o = 8*log(-1.0/m)/log(2); /* convert to 'decibels' */ + + o = o / (ENV_STEP/4); + + n = (int)(2.0*o); + if (n&1) /* round to nearest */ + n = (n>>1)+1; + else + n = n>>1; + + sin_tab[ i ] = n*2 + (m>=0.0? 0: 1 ); + + /*logerror("FMOPL.C: sin [%4i (hex=%03x)]= %4i (tl_tab value=%5i)\n", i, i, sin_tab[i], tl_tab[sin_tab[i]] );*/ } - /* make total level table */ - for (t = 0; t < EG_ENT - 1 ; t++){ - rate = ((1 << TL_BITS) - 1) / pow(10, EG_STEP * t / 20); /* dB -> voltage */ - TL_TABLE[ t] = (int)rate; - TL_TABLE[TL_MAX + t] = -TL_TABLE[t]; + + for (i=0; i<SIN_LEN; i++) + { + /* waveform 1: __ __ */ + /* / \____/ \____*/ + /* output only first half of the sinus waveform (positive one) */ + + if (i & (1<<(SIN_BITS-1)) ) + sin_tab[1*SIN_LEN+i] = TL_TAB_LEN; + else + sin_tab[1*SIN_LEN+i] = sin_tab[i]; + + /* waveform 2: __ __ __ __ */ + /* / \/ \/ \/ \*/ + /* abs(sin) */ + + sin_tab[2*SIN_LEN+i] = sin_tab[i & (SIN_MASK>>1) ]; + + /* waveform 3: _ _ _ _ */ + /* / |_/ |_/ |_/ |_*/ + /* abs(output only first quarter of the sinus waveform) */ + + if (i & (1<<(SIN_BITS-2)) ) + sin_tab[3*SIN_LEN+i] = TL_TAB_LEN; + else + sin_tab[3*SIN_LEN+i] = sin_tab[i & (SIN_MASK>>2)]; + + /*logerror("FMOPL.C: sin1[%4i]= %4i (tl_tab value=%5i)\n", i, sin_tab[1*SIN_LEN+i], tl_tab[sin_tab[1*SIN_LEN+i]] ); + logerror("FMOPL.C: sin2[%4i]= %4i (tl_tab value=%5i)\n", i, sin_tab[2*SIN_LEN+i], tl_tab[sin_tab[2*SIN_LEN+i]] ); + logerror("FMOPL.C: sin3[%4i]= %4i (tl_tab value=%5i)\n", i, sin_tab[3*SIN_LEN+i], tl_tab[sin_tab[3*SIN_LEN+i]] );*/ } - /* fill volume off area */ - for (t = EG_ENT - 1; t < TL_MAX; t++){ - TL_TABLE[t] = TL_TABLE[TL_MAX + t] = 0; + /*logerror("FMOPL.C: ENV_QUIET= %08x (dec*8=%i)\n", ENV_QUIET, ENV_QUIET*8 );*/ + + +#ifdef SAVE_SAMPLE + sample[0]=fopen("sampsum.pcm","wb"); +#endif + + return 1; +} + +static void OPLCloseTable( void ) +{ +#ifdef SAVE_SAMPLE + fclose(sample[0]); +#endif +} + + + +static void OPL_initalize(FM_OPL *OPL) +{ + int i; + + /* frequency base */ +#if 1 + OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / 72.0) / OPL->rate : 0; +#else + OPL->rate = (double)OPL->clock / 72.0; + OPL->freqbase = 1.0; +#endif + + /* Timer base time */ + OPL->TimerBase = 1.0 / ((double)OPL->clock / 72.0 ); + + /* make fnumber -> increment counter table */ + for( i=0 ; i < 1024 ; i++ ) + { + /* opn phase increment counter = 20bit */ + OPL->fn_tab[i] = (UINT32)( (double)i * 64 * OPL->freqbase * (1<<(FREQ_SH-10)) ); /* -10 because chip works with 10.10 fixed point, while we use 16.16 */ +#if 0 + logerror("FMOPL.C: fn_tab[%4i] = %08x (dec=%8i)\n", + i, OPL->fn_tab[i]>>6, OPL->fn_tab[i]>>6 ); +#endif } - /* make sinwave table (total level offet) */ - /* degree 0 = degree 180 = off */ - SIN_TABLE[0] = SIN_TABLE[SIN_ENT /2 ] = &TL_TABLE[EG_ENT - 1]; - for (s = 1;s <= SIN_ENT / 4; s++){ - pom = sin(2 * PI * s / SIN_ENT); /* sin */ - pom = 20 * log10(1 / pom); /* decibel */ - j = int(pom / EG_STEP); /* TL_TABLE steps */ - - /* degree 0 - 90 , degree 180 - 90 : plus section */ - SIN_TABLE[ s] = SIN_TABLE[SIN_ENT / 2 - s] = &TL_TABLE[j]; - /* degree 180 - 270 , degree 360 - 270 : minus section */ - SIN_TABLE[SIN_ENT / 2 + s] = SIN_TABLE[SIN_ENT - s] = &TL_TABLE[TL_MAX + j]; +#if 0 + for( i=0 ; i < 16 ; i++ ) + { + logerror("FMOPL.C: sl_tab[%i] = %08x\n", + i, sl_tab[i] ); } - for (s = 0;s < SIN_ENT; s++) { - SIN_TABLE[SIN_ENT * 1 + s] = s < (SIN_ENT / 2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; - SIN_TABLE[SIN_ENT * 2 + s] = SIN_TABLE[s % (SIN_ENT / 2)]; - SIN_TABLE[SIN_ENT * 3 + s] = (s / (SIN_ENT / 4)) & 1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT * 2 + s]; + for( i=0 ; i < 8 ; i++ ) + { + int j; + logerror("FMOPL.C: ksl_tab[oct=%2i] =",i); + for (j=0; j<16; j++) + { + logerror("%08x ", ksl_tab[i*16+j] ); + } + logerror("\n"); } +#endif + + + /* Amplitude modulation: 27 output levels (triangle waveform); 1 level takes one of: 192, 256 or 448 samples */ + /* One entry from LFO_AM_TABLE lasts for 64 samples */ + OPL->lfo_am_inc = (UINT32)((1.0 / 64.0 ) * (1<<LFO_SH) * OPL->freqbase); + + /* Vibrato: 8 output levels (triangle waveform); 1 level takes 1024 samples */ + OPL->lfo_pm_inc = (UINT32)((1.0 / 1024.0) * (1<<LFO_SH) * OPL->freqbase); + + /*logerror ("OPL->lfo_am_inc = %8x ; OPL->lfo_pm_inc = %8x\n", OPL->lfo_am_inc, OPL->lfo_pm_inc);*/ - /* envelope counter -> envelope output table */ - for (i=0; i < EG_ENT; i++) { - /* ATTACK curve */ - pom = pow(((double)(EG_ENT - 1 - i) / EG_ENT), 8) * EG_ENT; - /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ - ENV_CURVE[i] = (int)pom; - /* DECAY ,RELEASE curve */ - ENV_CURVE[(EG_DST >> ENV_BITS) + i]= i; + /* Noise generator: a step takes 1 sample */ + OPL->noise_f = (UINT32)((1.0 / 1.0) * (1<<FREQ_SH) * OPL->freqbase); + + OPL->eg_timer_add = (UINT32)((1<<EG_SH) * OPL->freqbase); + OPL->eg_timer_overflow = ( 1 ) * (1<<EG_SH); + /*logerror("OPLinit eg_timer_add=%8x eg_timer_overflow=%8x\n", OPL->eg_timer_add, OPL->eg_timer_overflow);*/ + +} + +INLINE void FM_KEYON(OPL_SLOT *SLOT, UINT32 key_set) +{ + if( !SLOT->key ) + { + /* restart Phase Generator */ + SLOT->Cnt = 0; + /* phase -> Attack */ + SLOT->state = EG_ATT; } - /* off */ - ENV_CURVE[EG_OFF >> ENV_BITS]= EG_ENT - 1; - /* make LFO ams table */ - for (i=0; i < AMS_ENT; i++) { - pom = (1.0 + sin(2 * PI * i / AMS_ENT)) / 2; /* sin */ - AMS_TABLE[i] = (int)((1.0 / EG_STEP) * pom); /* 1dB */ - AMS_TABLE[AMS_ENT + i] = (int)((4.8 / EG_STEP) * pom); /* 4.8dB */ + SLOT->key |= key_set; +} + +INLINE void FM_KEYOFF(OPL_SLOT *SLOT, UINT32 key_clr) +{ + if( SLOT->key ) + { + SLOT->key &= key_clr; + + if( !SLOT->key ) + { + /* phase -> Release */ + if (SLOT->state>EG_REL) + SLOT->state = EG_REL; + } } - /* make LFO vibrate table */ - for (i=0; i < VIB_ENT; i++) { - /* 100cent = 1seminote = 6% ?? */ - pom = (double)VIB_RATE * 0.06 * sin(2 * PI * i / VIB_ENT); /* +-100sect step */ - VIB_TABLE[i] = (int)(VIB_RATE + (pom * 0.07)); /* +- 7cent */ - VIB_TABLE[VIB_ENT + i] = (int)(VIB_RATE + (pom * 0.14)); /* +-14cent */ +} + +/* update phase increment counter of operator (also update the EG rates if necessary) */ +INLINE void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) +{ + int ksr; + + /* (frequency) phase increment counter */ + SLOT->Incr = CH->fc * SLOT->mul; + ksr = CH->kcode >> SLOT->KSR; + + if( SLOT->ksr != ksr ) + { + SLOT->ksr = ksr; + + /* calculate envelope generator rates */ + if ((SLOT->ar + SLOT->ksr) < 16+62) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select[SLOT->ar + SLOT->ksr ]; + } + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 13*RATE_STEPS; + } + SLOT->eg_sh_dr = eg_rate_shift [SLOT->dr + SLOT->ksr ]; + SLOT->eg_sel_dr = eg_rate_select[SLOT->dr + SLOT->ksr ]; + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr ]; + SLOT->eg_sel_rr = eg_rate_select[SLOT->rr + SLOT->ksr ]; } - return 1; } -static void OPLCloseTable(void) { - free(TL_TABLE); - free(SIN_TABLE); - free(AMS_TABLE); - free(VIB_TABLE); +/* set multi,am,vib,EG-TYP,KSR,mul */ +INLINE void set_mul(FM_OPL *OPL,int slot,int v) +{ + OPL_CH *CH = &OPL->P_CH[slot/2]; + OPL_SLOT *SLOT = &CH->SLOT[slot&1]; + + SLOT->mul = mul_tab[v&0x0f]; + SLOT->KSR = (v&0x10) ? 0 : 2; + SLOT->eg_type = (v&0x20); + SLOT->vib = (v&0x40); + SLOT->AMmask = (v&0x80) ? ~0 : 0; + CALC_FCSLOT(CH,SLOT); +} + +/* set ksl & tl */ +INLINE void set_ksl_tl(FM_OPL *OPL,int slot,int v) +{ + OPL_CH *CH = &OPL->P_CH[slot/2]; + OPL_SLOT *SLOT = &CH->SLOT[slot&1]; + int ksl = v>>6; /* 0 / 1.5 / 3.0 / 6.0 dB/OCT */ + + SLOT->ksl = ksl ? 3-ksl : 31; + SLOT->TL = (v&0x3f)<<(ENV_BITS-1-7); /* 7 bits TL (bit 6 = always 0) */ + + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); } -/* CSM Key Controll */ -inline void CSMKeyControll(OPL_CH *CH) { - OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; - OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; - /* all key off */ - OPL_KEYOFF(slot1); - OPL_KEYOFF(slot2); - /* total level latch */ - slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); - slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); - /* key on */ - CH->op1_out[0] = CH->op1_out[1] = 0; - OPL_KEYON(slot1); - OPL_KEYON(slot2); -} - -/* ---------- opl initialize ---------- */ -static void OPL_initalize(FM_OPL *OPL) { - int fn; +/* set attack rate & decay rate */ +INLINE void set_ar_dr(FM_OPL *OPL,int slot,int v) +{ + OPL_CH *CH = &OPL->P_CH[slot/2]; + OPL_SLOT *SLOT = &CH->SLOT[slot&1]; - /* frequency base */ - OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; - /* Timer base time */ - OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); - /* make time tables */ - init_timetables(OPL, OPL_ARRATE, OPL_DRRATE); - /* make fnumber -> increment counter table */ - for( fn=0; fn < 1024; fn++) { - OPL->FN_TABLE[fn] = (uint)(OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2); + SLOT->ar = (v>>4) ? 16 + ((v>>4) <<2) : 0; + + if ((SLOT->ar + SLOT->ksr) < 16+62) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select[SLOT->ar + SLOT->ksr ]; } - /* LFO freq.table */ - OPL->amsIncr = (int)(OPL->rate ? (double)AMS_ENT * (1 << AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0); - OPL->vibIncr = (int)(OPL->rate ? (double)VIB_ENT * (1 << VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0); + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 13*RATE_STEPS; + } + + SLOT->dr = (v&0x0f)? 16 + ((v&0x0f)<<2) : 0; + SLOT->eg_sh_dr = eg_rate_shift [SLOT->dr + SLOT->ksr ]; + SLOT->eg_sel_dr = eg_rate_select[SLOT->dr + SLOT->ksr ]; } -/* ---------- write a OPL registers ---------- */ -void OPLWriteReg(FM_OPL *OPL, int r, int v) { +/* set sustain level & release rate */ +INLINE void set_sl_rr(FM_OPL *OPL,int slot,int v) +{ + OPL_CH *CH = &OPL->P_CH[slot/2]; + OPL_SLOT *SLOT = &CH->SLOT[slot&1]; + + SLOT->sl = sl_tab[ v>>4 ]; + + SLOT->rr = (v&0x0f)? 16 + ((v&0x0f)<<2) : 0; + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr ]; + SLOT->eg_sel_rr = eg_rate_select[SLOT->rr + SLOT->ksr ]; +} + + +/* write a value v to register r on OPL chip */ +static void OPLWriteReg(FM_OPL *OPL, int r, int v) +{ OPL_CH *CH; int slot; - uint block_fnum; - - switch(r & 0xe0) { - case 0x00: /* 00-1f:controll */ - switch(r & 0x1f) { - case 0x01: - /* wave selector enable */ - if(OPL->type&OPL_TYPE_WAVESEL) { - OPL->wavesel = v & 0x20; - if(!OPL->wavesel) { - /* preset compatible mode */ - int c; - for(c=0; c<OPL->max_ch; c++) { - OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; - OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; - } - } + UINT32 block_fnum; + + + /* adjust bus to 8 bits */ + r &= 0xff; + v &= 0xff; + +#ifdef LOG_CYM_FILE + if ((cymfile) && (r!=0) ) + { + fputc( (unsigned char)r, cymfile ); + fputc( (unsigned char)v, cymfile ); + } +#endif + + + switch(r&0xe0) + { + case 0x00: /* 00-1f:control */ + switch(r&0x1f) + { + case 0x01: /* waveform select enable */ + if(OPL->type&OPL_TYPE_WAVESEL) + { + OPL->wavesel = v&0x20; + /* do not change the waveform previously selected */ } - return; + break; case 0x02: /* Timer 1 */ - OPL->T[0] = (256-v) * 4; + OPL->T[0] = (256-v)*4; break; case 0x03: /* Timer 2 */ - OPL->T[1] = (256-v) * 16; - return; + OPL->T[1] = (256-v)*16; + break; case 0x04: /* IRQ clear / mask and Timer enable */ - if(v & 0x80) { /* IRQ flag clear */ - OPL_STATUS_RESET(OPL, 0x7f); + if(v&0x80) + { /* IRQ flag clear */ + OPL_STATUS_RESET(OPL,0x7f); } - else { /* set IRQ mask ,timer enable*/ - uint8 st1 = v & 1; - uint8 st2 = (v >> 1) & 1; + else + { /* set IRQ mask ,timer enable*/ + UINT8 st1 = v&1; + UINT8 st2 = (v>>1)&1; /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ - OPL_STATUS_RESET(OPL, v & 0x78); - OPL_STATUSMASK_SET(OPL,((~v) & 0x78) | 0x01); + OPL_STATUS_RESET(OPL,v&0x78); + OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); /* timer 2 */ - if(OPL->st[1] != st2) { - double interval = st2 ? (double)OPL->T[1] * OPL->TimerBase : 0.0; + if(OPL->st[1] != st2) + { + double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; OPL->st[1] = st2; - if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam + 1, interval); + if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); } /* timer 1 */ - if(OPL->st[0] != st1) { - double interval = st1 ? (double)OPL->T[0] * OPL->TimerBase : 0.0; + if(OPL->st[0] != st1) + { + double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; OPL->st[0] = st1; - if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam + 0, interval); + if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); } } - return; + break; +#if BUILD_Y8950 + case 0x06: /* Key Board OUT */ + if(OPL->type&OPL_TYPE_KEYBOARD) + { + if(OPL->keyboardhandler_w) + OPL->keyboardhandler_w(OPL->keyboard_param,v); + else + logerror("OPL:write unmapped KEYBOARD port\n"); + } + break; + case 0x07: /* DELTA-T controll : START,REC,MEMDATA,REPT,SPOFF,x,x,RST */ + if(OPL->type&OPL_TYPE_ADPCM) + YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v); + break; +#endif + case 0x08: /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */ + OPL->mode = v; +#if !(BUILD_Y8950) + break; +#endif + +#if BUILD_Y8950 + v&=0x1f; /* for DELTA-T unit */ + case 0x09: /* START ADD */ + case 0x0a: + case 0x0b: /* STOP ADD */ + case 0x0c: + case 0x0d: /* PRESCALE */ + case 0x0e: + case 0x0f: /* ADPCM data */ + case 0x10: /* DELTA-N */ + case 0x11: /* DELTA-N */ + case 0x12: /* EG-CTRL */ + if(OPL->type&OPL_TYPE_ADPCM) + YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v); + break; +#if 0 + case 0x15: /* DAC data */ + case 0x16: + case 0x17: /* SHIFT */ + break; + case 0x18: /* I/O CTRL (Direction) */ + if(OPL->type&OPL_TYPE_IO) + OPL->portDirection = v&0x0f; + break; + case 0x19: /* I/O DATA */ + if(OPL->type&OPL_TYPE_IO) + { + OPL->portLatch = v; + if(OPL->porthandler_w) + OPL->porthandler_w(OPL->port_param,v&OPL->portDirection); + } + break; + case 0x1a: /* PCM data */ + break; +#endif +#endif } break; - case 0x20: /* am,vib,ksr,eg type,mul */ + case 0x20: /* am ON, vib ON, ksr, eg_type, mul */ slot = slot_array[r&0x1f]; - if(slot == -1) - return; + if(slot < 0) return; set_mul(OPL,slot,v); - return; + break; case 0x40: slot = slot_array[r&0x1f]; - if(slot == -1) - return; + if(slot < 0) return; set_ksl_tl(OPL,slot,v); - return; + break; case 0x60: slot = slot_array[r&0x1f]; - if(slot == -1) - return; + if(slot < 0) return; set_ar_dr(OPL,slot,v); - return; + break; case 0x80: slot = slot_array[r&0x1f]; - if(slot == -1) - return; + if(slot < 0) return; set_sl_rr(OPL,slot,v); - return; + break; case 0xa0: - switch(r) { - case 0xbd: - /* amsep,vibdep,r,bd,sd,tom,tc,hh */ + if (r == 0xbd) /* am depth, vibrato depth, r,bd,sd,tom,tc,hh */ + { + OPL->lfo_am_depth = v & 0x80; + OPL->lfo_pm_depth_range = (v&0x40) ? 8 : 0; + + OPL->rhythm = v&0x3f; + + if(OPL->rhythm&0x20) { - uint8 rkey = OPL->rythm ^ v; - OPL->ams_table = &AMS_TABLE[v & 0x80 ? AMS_ENT : 0]; - OPL->vib_table = &VIB_TABLE[v & 0x40 ? VIB_ENT : 0]; - OPL->rythm = v & 0x3f; - if(OPL->rythm & 0x20) { /* BD key on/off */ - if(rkey & 0x10) { - if(v & 0x10) { - OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; - OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); - OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); - } - else { - OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); - OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); - } - } - /* SD key on/off */ - if(rkey & 0x08) { - if(v & 0x08) - OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); - else - OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); - }/* TAM key on/off */ - if(rkey & 0x04) { - if(v & 0x04) - OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); - else - OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); + if(v&0x10) + { + FM_KEYON (&OPL->P_CH[6].SLOT[SLOT1], 2); + FM_KEYON (&OPL->P_CH[6].SLOT[SLOT2], 2); } - /* TOP-CY key on/off */ - if(rkey & 0x02) { - if(v & 0x02) - OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); - else - OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); + else + { + FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1],~2); + FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2],~2); } /* HH key on/off */ - if(rkey & 0x01) { - if(v & 0x01) - OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); - else - OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); - } + if(v&0x01) FM_KEYON (&OPL->P_CH[7].SLOT[SLOT1], 2); + else FM_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1],~2); + /* SD key on/off */ + if(v&0x08) FM_KEYON (&OPL->P_CH[7].SLOT[SLOT2], 2); + else FM_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2],~2); + /* TOM key on/off */ + if(v&0x04) FM_KEYON (&OPL->P_CH[8].SLOT[SLOT1], 2); + else FM_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1],~2); + /* TOP-CY key on/off */ + if(v&0x02) FM_KEYON (&OPL->P_CH[8].SLOT[SLOT2], 2); + else FM_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2],~2); } + else + { + /* BD key off */ + FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1],~2); + FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2],~2); + /* HH key off */ + FM_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1],~2); + /* SD key off */ + FM_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2],~2); + /* TOM key off */ + FM_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1],~2); + /* TOP-CY off */ + FM_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2],~2); } return; } /* keyon,block,fnum */ - if((r & 0x0f) > 8) - return; - CH = &OPL->P_CH[r & 0x0f]; - if(!(r&0x10)) { /* a0-a8 */ - block_fnum = (CH->block_fnum & 0x1f00) | v; + if( (r&0x0f) > 8) return; + CH = &OPL->P_CH[r&0x0f]; + if(!(r&0x10)) + { /* a0-a8 */ + block_fnum = (CH->block_fnum&0x1f00) | v; } - else { /* b0-b8 */ - int keyon = (v >> 5) & 1; - block_fnum = ((v & 0x1f) << 8) | (CH->block_fnum & 0xff); - if(CH->keyon != keyon) { - if((CH->keyon=keyon)) { - CH->op1_out[0] = CH->op1_out[1] = 0; - OPL_KEYON(&CH->SLOT[SLOT1]); - OPL_KEYON(&CH->SLOT[SLOT2]); - } - else { - OPL_KEYOFF(&CH->SLOT[SLOT1]); - OPL_KEYOFF(&CH->SLOT[SLOT2]); - } + else + { /* b0-b8 */ + block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); + + if(v&0x20) + { + FM_KEYON (&CH->SLOT[SLOT1], 1); + FM_KEYON (&CH->SLOT[SLOT2], 1); + } + else + { + FM_KEYOFF(&CH->SLOT[SLOT1],~1); + FM_KEYOFF(&CH->SLOT[SLOT2],~1); } } /* update */ - if(CH->block_fnum != block_fnum) { - int blockRv = 7 - (block_fnum >> 10); - int fnum = block_fnum & 0x3ff; + if(CH->block_fnum != block_fnum) + { + UINT8 block = block_fnum >> 10; + CH->block_fnum = block_fnum; - CH->ksl_base = KSL_TABLE[block_fnum >> 6]; - CH->fc = OPL->FN_TABLE[fnum] >> blockRv; - CH->kcode = CH->block_fnum >> 9; - if((OPL->mode & 0x40) && CH->block_fnum & 0x100) - CH->kcode |=1; + + CH->ksl_base = ksl_tab[block_fnum>>6]; + CH->fc = OPL->fn_tab[block_fnum&0x03ff] >> (7-block); + + /* BLK 2,1,0 bits -> bits 3,2,1 of kcode */ + CH->kcode = (CH->block_fnum&0x1c00)>>9; + + /* the info below is actually opposite to what is stated in the Manuals (verifed on real YM3812) */ + /* if notesel == 0 -> lsb of kcode is bit 10 (MSB) of fnum */ + /* if notesel == 1 -> lsb of kcode is bit 9 (MSB-1) of fnum */ + if (OPL->mode&0x40) + CH->kcode |= (CH->block_fnum&0x100)>>8; /* notesel == 1 */ + else + CH->kcode |= (CH->block_fnum&0x200)>>9; /* notesel == 0 */ + + /* refresh Total Level in both SLOTs of this channel */ + CH->SLOT[SLOT1].TLL = CH->SLOT[SLOT1].TL + (CH->ksl_base>>CH->SLOT[SLOT1].ksl); + CH->SLOT[SLOT2].TLL = CH->SLOT[SLOT2].TL + (CH->ksl_base>>CH->SLOT[SLOT2].ksl); + + /* refresh frequency counter in both SLOTs of this channel */ CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); } - return; + break; case 0xc0: /* FB,C */ - if((r & 0x0f) > 8) - return; + if( (r&0x0f) > 8) return; CH = &OPL->P_CH[r&0x0f]; + CH->SLOT[SLOT1].FB = (v>>1)&7 ? ((v>>1)&7) + 7 : 0; + CH->SLOT[SLOT1].CON = v&1; + CH->SLOT[SLOT1].connect1 = CH->SLOT[SLOT1].CON ? &output[0] : &phase_modulation; + break; + case 0xe0: /* waveform select */ + /* simply ignore write to the waveform select register if selecting not enabled in test register */ + if(OPL->wavesel) { - int feedback = (v >> 1) & 7; - CH->FB = feedback ? (8 + 1) - feedback : 0; - CH->CON = v & 1; - set_algorythm(CH); - } - return; - case 0xe0: /* wave type */ - slot = slot_array[r & 0x1f]; - if(slot == -1) - return; - CH = &OPL->P_CH[slot / 2]; - if(OPL->wavesel) { - CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v & 0x03) * SIN_ENT]; + slot = slot_array[r&0x1f]; + if(slot < 0) return; + CH = &OPL->P_CH[slot/2]; + + CH->SLOT[slot&1].wavetable = (v&0x03)*SIN_LEN; } - return; + break; } } +#ifdef LOG_CYM_FILE +static void cymfile_callback (int n) +{ + if (cymfile) + { + fputc( (unsigned char)0, cymfile ); + } +} +#endif + /* lock/unlock for common table */ static int OPL_LockTable(void) { num_lock++; - if(num_lock>1) - return 0; + if(num_lock>1) return 0; + /* first time */ + cur_chip = NULL; /* allocate total level table (128kb space) */ - if(!OPLOpenTable()) { + if( !init_tables() ) + { num_lock--; return -1; } + +#ifdef LOG_CYM_FILE + cymfile = fopen("3812_.cym","wb"); + if (cymfile) + timer_pulse ( TIME_IN_HZ(110), 0, cymfile_callback); /*110 Hz pulse timer*/ + else + logerror("Could not create file 3812_.cym\n"); +#endif + return 0; } -static void OPL_UnLockTable(void) { - if(num_lock) - num_lock--; - if(num_lock) - return; +static void OPL_UnLockTable(void) +{ + if(num_lock) num_lock--; + if(num_lock) return; + /* last time */ + cur_chip = NULL; OPLCloseTable(); -} -/*******************************************************************************/ -/* YM3812 local section */ -/*******************************************************************************/ - -/* ---------- update one of chip ----------- */ -void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length) { - int i; - int data; - int16 *buf = buffer; - uint amsCnt = OPL->amsCnt; - uint vibCnt = OPL->vibCnt; - uint8 rythm = OPL->rythm & 0x20; - OPL_CH *CH, *R_CH; - - if((void *)OPL != cur_chip){ - cur_chip = (void *)OPL; - /* channel pointers */ - S_CH = OPL->P_CH; - E_CH = &S_CH[9]; - /* rythm slot */ - SLOT7_1 = &S_CH[7].SLOT[SLOT1]; - SLOT7_2 = &S_CH[7].SLOT[SLOT2]; - SLOT8_1 = &S_CH[8].SLOT[SLOT1]; - SLOT8_2 = &S_CH[8].SLOT[SLOT2]; - /* LFO state */ - amsIncr = OPL->amsIncr; - vibIncr = OPL->vibIncr; - ams_table = OPL->ams_table; - vib_table = OPL->vib_table; - } - R_CH = rythm ? &S_CH[6] : E_CH; - for(i = 0; i < length; i++) { - /* channel A channel B channel C */ - /* LFO */ - ams = ams_table[(amsCnt += amsIncr) >> AMS_SHIFT]; - vib = vib_table[(vibCnt += vibIncr) >> VIB_SHIFT]; - outd[0] = 0; - /* FM part */ - for(CH=S_CH; CH < R_CH; CH++) - OPL_CALC_CH(CH); - /* Rythn part */ - if(rythm) - OPL_CALC_RH(S_CH); - /* limit check */ - data = Limit(outd[0], OPL_MAXOUT, OPL_MINOUT); - /* store to sound buffer */ - buf[i] = data >> OPL_OUTSB; - } +#ifdef LOG_CYM_FILE + fclose (cymfile); + cymfile = NULL; +#endif - OPL->amsCnt = amsCnt; - OPL->vibCnt = vibCnt; } -/* ---------- reset a chip ---------- */ -void OPLResetChip(FM_OPL *OPL) { +static void OPLResetChip(FM_OPL *OPL) +{ int c,s; int i; - /* reset chip */ - OPL->mode = 0; /* normal mode */ - OPL_STATUS_RESET(OPL, 0x7f); + OPL->eg_timer = 0; + OPL->eg_cnt = 0; + + OPL->noise_rng = 1; /* noise shift register */ + OPL->mode = 0; /* normal mode */ + OPL_STATUS_RESET(OPL,0x7f); + /* reset with register write */ - OPLWriteReg(OPL, 0x01,0); /* wabesel disable */ - OPLWriteReg(OPL, 0x02,0); /* Timer1 */ - OPLWriteReg(OPL, 0x03,0); /* Timer2 */ - OPLWriteReg(OPL, 0x04,0); /* IRQ mask clear */ - for(i = 0xff; i >= 0x20; i--) - OPLWriteReg(OPL,i,0); - /* reset OPerator paramater */ - for(c = 0; c < OPL->max_ch ;c++ ) { + OPLWriteReg(OPL,0x01,0); /* wavesel disable */ + OPLWriteReg(OPL,0x02,0); /* Timer1 */ + OPLWriteReg(OPL,0x03,0); /* Timer2 */ + OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ + for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); + + /* reset operator parameters */ + for( c = 0 ; c < 9 ; c++ ) + { OPL_CH *CH = &OPL->P_CH[c]; - /* OPL->P_CH[c].PAN = OPN_CENTER; */ - for(s = 0; s < 2; s++ ) { + for(s = 0 ; s < 2 ; s++ ) + { /* wave table */ - CH->SLOT[s].wavetable = &SIN_TABLE[0]; - /* CH->SLOT[s].evm = ENV_MOD_RR; */ - CH->SLOT[s].evc = EG_OFF; - CH->SLOT[s].eve = EG_OFF + 1; - CH->SLOT[s].evs = 0; + CH->SLOT[s].wavetable = 0; + CH->SLOT[s].state = EG_OFF; + CH->SLOT[s].volume = MAX_ATT_INDEX; } } +#if BUILD_Y8950 + if(OPL->type&OPL_TYPE_ADPCM) + { + YM_DELTAT *DELTAT = OPL->deltat; + + DELTAT->freqbase = OPL->freqbase; + DELTAT->output_pointer = &output_deltat[0]; + DELTAT->portshift = 5; + DELTAT->output_range = 1<<23; + YM_DELTAT_ADPCM_Reset(DELTAT,0); + } +#endif } -/* ---------- Create a virtual YM3812 ---------- */ -/* 'rate' is sampling rate and 'bufsiz' is the size of the */ -FM_OPL *OPLCreate(int type, int clock, int rate) { +/* Create one of virtual YM3812 */ +/* 'clock' is chip clock in Hz */ +/* 'rate' is sampling rate */ +static FM_OPL *OPLCreate(int type, int clock, int rate) +{ char *ptr; FM_OPL *OPL; int state_size; - int max_ch = 9; /* normaly 9 channels */ - if( OPL_LockTable() == -1) - return NULL; - /* allocate OPL state space */ + if (OPL_LockTable() ==-1) return NULL; + + /* calculate OPL state size */ state_size = sizeof(FM_OPL); - state_size += sizeof(OPL_CH) * max_ch; + +#if BUILD_Y8950 + if (type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT); +#endif /* allocate memory block */ - ptr = (char *)calloc(state_size, 1); - if(ptr == NULL) + ptr = (char *)malloc(state_size); + + if (ptr==NULL) return NULL; /* clear */ - memset(ptr, 0, state_size); - OPL = (FM_OPL *)ptr; ptr += sizeof(FM_OPL); - OPL->P_CH = (OPL_CH *)ptr; ptr += sizeof(OPL_CH) * max_ch; + memset(ptr,0,state_size); + + OPL = (FM_OPL *)ptr; + + ptr += sizeof(FM_OPL); + +#if BUILD_Y8950 + if (type&OPL_TYPE_ADPCM) + OPL->deltat = (YM_DELTAT *)ptr; + ptr += sizeof(YM_DELTAT); +#endif - /* set channel state pointer */ OPL->type = type; OPL->clock = clock; OPL->rate = rate; - OPL->max_ch = max_ch; - /* init grobal tables */ + /* init global tables */ OPL_initalize(OPL); /* reset chip */ @@ -1048,76 +1835,602 @@ FM_OPL *OPLCreate(int type, int clock, int rate) { return OPL; } -/* ---------- Destroy one of vietual YM3812 ---------- */ -void OPLDestroy(FM_OPL *OPL) { +/* Destroy one of virtual YM3812 */ +static void OPLDestroy(FM_OPL *OPL) +{ OPL_UnLockTable(); free(OPL); } -/* ---------- Option handlers ---------- */ +/* Option handlers */ -void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,int channelOffset) { +static void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) +{ OPL->TimerHandler = TimerHandler; OPL->TimerParam = channelOffset; } - -void OPLSetIRQHandler(FM_OPL *OPL, OPL_IRQHANDLER IRQHandler, int param) { +static void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param) +{ OPL->IRQHandler = IRQHandler; OPL->IRQParam = param; } -void OPLSetUpdateHandler(FM_OPL *OPL, OPL_UPDATEHANDLER UpdateHandler,int param) { +static void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) +{ OPL->UpdateHandler = UpdateHandler; OPL->UpdateParam = param; } -/* ---------- YM3812 I/O interface ---------- */ -int OPLWrite(FM_OPL *OPL,int a,int v) { - if(!(a & 1)) { /* address port */ +/* YM3812 I/O interface */ +static int OPLWrite(FM_OPL *OPL,int a,int v) +{ + if( !(a&1) ) + { /* address port */ OPL->address = v & 0xff; } - else { /* data port */ - if(OPL->UpdateHandler) - OPL->UpdateHandler(OPL->UpdateParam,0); - OPLWriteReg(OPL, OPL->address,v); + else + { /* data port */ + if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); + OPLWriteReg(OPL,OPL->address,v); } - return OPL->status >> 7; + return OPL->status>>7; } -unsigned char OPLRead(FM_OPL *OPL,int a) { - if(!(a & 1)) { /* status port */ - return OPL->status & (OPL->statusmask | 0x80); +static unsigned char OPLRead(FM_OPL *OPL,int a) +{ + if( !(a&1) ) + { + /* status port */ + return OPL->status & (OPL->statusmask|0x80); } + +#if BUILD_Y8950 /* data port */ - switch(OPL->address) { + switch(OPL->address) + { case 0x05: /* KeyBoard IN */ - warning("OPL:read unmapped KEYBOARD port\n"); + if(OPL->type&OPL_TYPE_KEYBOARD) + { + if(OPL->keyboardhandler_r) + return OPL->keyboardhandler_r(OPL->keyboard_param); + else + logerror("OPL:read unmapped KEYBOARD port\n"); + } + return 0; +#if 0 + case 0x0f: /* ADPCM-DATA */ return 0; +#endif case 0x19: /* I/O DATA */ - warning("OPL:read unmapped I/O port\n"); + if(OPL->type&OPL_TYPE_IO) + { + if(OPL->porthandler_r) + return OPL->porthandler_r(OPL->port_param); + else + logerror("OPL:read unmapped I/O port\n"); + } return 0; case 0x1a: /* PCM-DATA */ return 0; } - return 0; +#endif + + return 0xff; } -int OPLTimerOver(FM_OPL *OPL, int c) { - if(c) { /* Timer B */ - OPL_STATUS_SET(OPL, 0x20); +/* CSM Key Controll */ +INLINE void CSMKeyControll(OPL_CH *CH) +{ + FM_KEYON (&CH->SLOT[SLOT1], 4); + FM_KEYON (&CH->SLOT[SLOT2], 4); + + /* The key off should happen exactly one sample later - not implemented correctly yet */ + + FM_KEYOFF(&CH->SLOT[SLOT1], ~4); + FM_KEYOFF(&CH->SLOT[SLOT2], ~4); +} + + +static int OPLTimerOver(FM_OPL *OPL,int c) +{ + if( c ) + { /* Timer B */ + OPL_STATUS_SET(OPL,0x20); } - else { /* Timer A */ - OPL_STATUS_SET(OPL, 0x40); + else + { /* Timer A */ + OPL_STATUS_SET(OPL,0x40); /* CSM mode key,TL controll */ - if(OPL->mode & 0x80) { /* CSM mode total level latch and auto key on */ + if( OPL->mode & 0x80 ) + { /* CSM mode total level latch and auto key on */ int ch; - if(OPL->UpdateHandler) - OPL->UpdateHandler(OPL->UpdateParam,0); - for(ch = 0; ch < 9; ch++) - CSMKeyControll(&OPL->P_CH[ch]); + if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); + for(ch=0; ch<9; ch++) + CSMKeyControll( &OPL->P_CH[ch] ); } } /* reload timer */ - if (OPL->TimerHandler) - (OPL->TimerHandler)(OPL->TimerParam + c, (double)OPL->T[c] * OPL->TimerBase); - return OPL->status >> 7; + if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); + return OPL->status>>7; } + + +#define MAX_OPL_CHIPS 2 + + +#if (BUILD_YM3812) + +static FM_OPL *OPL_YM3812[MAX_OPL_CHIPS]; /* array of pointers to the YM3812's */ +static int YM3812NumChips = 0; /* number of chips */ + +int YM3812Init(int num, int clock, int rate) +{ + int i; + + if (YM3812NumChips) + return -1; /* duplicate init. */ + + YM3812NumChips = num; + + for (i = 0;i < YM3812NumChips; i++) + { + /* emulator create */ + OPL_YM3812[i] = OPLCreate(OPL_TYPE_YM3812,clock,rate); + if(OPL_YM3812[i] == NULL) + { + /* it's really bad - we run out of memeory */ + YM3812NumChips = 0; + return -1; + } + } + + return 0; +} + +void YM3812Shutdown(void) +{ + int i; + + for (i = 0;i < YM3812NumChips; i++) + { + /* emulator shutdown */ + OPLDestroy(OPL_YM3812[i]); + OPL_YM3812[i] = NULL; + } + YM3812NumChips = 0; +} +void YM3812ResetChip(int which) +{ + OPLResetChip(OPL_YM3812[which]); +} + +int YM3812Write(int which, int a, int v) +{ + return OPLWrite(OPL_YM3812[which], a, v); +} + +unsigned char YM3812Read(int which, int a) +{ + /* YM3812 always returns bit2 and bit1 in HIGH state */ + return OPLRead(OPL_YM3812[which], a) | 0x06 ; +} +int YM3812TimerOver(int which, int c) +{ + return OPLTimerOver(OPL_YM3812[which], c); +} + +void YM3812SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset) +{ + OPLSetTimerHandler(OPL_YM3812[which], TimerHandler, channelOffset); +} +void YM3812SetIRQHandler(int which,OPL_IRQHANDLER IRQHandler,int param) +{ + OPLSetIRQHandler(OPL_YM3812[which], IRQHandler, param); +} +void YM3812SetUpdateHandler(int which,OPL_UPDATEHANDLER UpdateHandler,int param) +{ + OPLSetUpdateHandler(OPL_YM3812[which], UpdateHandler, param); +} + + +/* +** Generate samples for one of the YM3812's +** +** 'which' is the virtual YM3812 number +** '*buffer' is the output buffer pointer +** 'length' is the number of samples that should be generated +*/ +void YM3812UpdateOne(int which, INT16 *buffer, int length) +{ + FM_OPL *OPL = OPL_YM3812[which]; + UINT8 rhythm = OPL->rhythm&0x20; + OPLSAMPLE *buf = buffer; + int i; + + if( (void *)OPL != cur_chip ){ + cur_chip = (void *)OPL; + /* rhythm slots */ + SLOT7_1 = &OPL->P_CH[7].SLOT[SLOT1]; + SLOT7_2 = &OPL->P_CH[7].SLOT[SLOT2]; + SLOT8_1 = &OPL->P_CH[8].SLOT[SLOT1]; + SLOT8_2 = &OPL->P_CH[8].SLOT[SLOT2]; + } + for( i=0; i < length ; i++ ) + { + int lt; + + output[0] = 0; + + advance_lfo(OPL); + + /* FM part */ + OPL_CALC_CH(&OPL->P_CH[0]); + OPL_CALC_CH(&OPL->P_CH[1]); + OPL_CALC_CH(&OPL->P_CH[2]); + OPL_CALC_CH(&OPL->P_CH[3]); + OPL_CALC_CH(&OPL->P_CH[4]); + OPL_CALC_CH(&OPL->P_CH[5]); + + if(!rhythm) + { + OPL_CALC_CH(&OPL->P_CH[6]); + OPL_CALC_CH(&OPL->P_CH[7]); + OPL_CALC_CH(&OPL->P_CH[8]); + } + else /* Rhythm part */ + { + OPL_CALC_RH(&OPL->P_CH[0], (OPL->noise_rng>>0)&1 ); + } + + lt = output[0]; + + lt >>= FINAL_SH; + + /* limit check */ + lt = limit( lt , MAXOUT, MINOUT ); + + #ifdef SAVE_SAMPLE + SAVE_ALL_CHANNELS + #endif + + /* store to sound buffer */ + buf[i] = lt; + + advancex(OPL); + } + +} +#endif /* BUILD_YM3812 */ + + + +#if (BUILD_YM3526) + +static FM_OPL *OPL_YM3526[MAX_OPL_CHIPS]; /* array of pointers to the YM3526's */ +static int YM3526NumChips = 0; /* number of chips */ + +int YM3526Init(int num, int clock, int rate) +{ + int i; + + if (YM3526NumChips) + return -1; /* duplicate init. */ + + YM3526NumChips = num; + + for (i = 0;i < YM3526NumChips; i++) + { + /* emulator create */ + OPL_YM3526[i] = OPLCreate(OPL_TYPE_YM3526,clock,rate); + if(OPL_YM3526[i] == NULL) + { + /* it's really bad - we run out of memeory */ + YM3526NumChips = 0; + return -1; + } + } + + return 0; +} + +void YM3526Shutdown(void) +{ + int i; + + for (i = 0;i < YM3526NumChips; i++) + { + /* emulator shutdown */ + OPLDestroy(OPL_YM3526[i]); + OPL_YM3526[i] = NULL; + } + YM3526NumChips = 0; +} +void YM3526ResetChip(int which) +{ + OPLResetChip(OPL_YM3526[which]); +} + +int YM3526Write(int which, int a, int v) +{ + return OPLWrite(OPL_YM3526[which], a, v); +} + +unsigned char YM3526Read(int which, int a) +{ + return OPLRead(OPL_YM3526[which], a); +} +int YM3526TimerOver(int which, int c) +{ + return OPLTimerOver(OPL_YM3526[which], c); +} + +void YM3526SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset) +{ + OPLSetTimerHandler(OPL_YM3526[which], TimerHandler, channelOffset); +} +void YM3526SetIRQHandler(int which,OPL_IRQHANDLER IRQHandler,int param) +{ + OPLSetIRQHandler(OPL_YM3526[which], IRQHandler, param); +} +void YM3526SetUpdateHandler(int which,OPL_UPDATEHANDLER UpdateHandler,int param) +{ + OPLSetUpdateHandler(OPL_YM3526[which], UpdateHandler, param); +} + + +/* +** Generate samples for one of the YM3526's +** +** 'which' is the virtual YM3526 number +** '*buffer' is the output buffer pointer +** 'length' is the number of samples that should be generated +*/ +void YM3526UpdateOne(int which, INT16 *buffer, int length) +{ + FM_OPL *OPL = OPL_YM3526[which]; + UINT8 rhythm = OPL->rhythm&0x20; + OPLSAMPLE *buf = buffer; + int i; + + if( (void *)OPL != cur_chip ){ + cur_chip = (void *)OPL; + /* rhythm slots */ + SLOT7_1 = &OPL->P_CH[7].SLOT[SLOT1]; + SLOT7_2 = &OPL->P_CH[7].SLOT[SLOT2]; + SLOT8_1 = &OPL->P_CH[8].SLOT[SLOT1]; + SLOT8_2 = &OPL->P_CH[8].SLOT[SLOT2]; + } + for( i=0; i < length ; i++ ) + { + int lt; + + output[0] = 0; + + advance_lfo(OPL); + + /* FM part */ + OPL_CALC_CH(&OPL->P_CH[0]); + OPL_CALC_CH(&OPL->P_CH[1]); + OPL_CALC_CH(&OPL->P_CH[2]); + OPL_CALC_CH(&OPL->P_CH[3]); + OPL_CALC_CH(&OPL->P_CH[4]); + OPL_CALC_CH(&OPL->P_CH[5]); + + if(!rhythm) + { + OPL_CALC_CH(&OPL->P_CH[6]); + OPL_CALC_CH(&OPL->P_CH[7]); + OPL_CALC_CH(&OPL->P_CH[8]); + } + else /* Rhythm part */ + { + OPL_CALC_RH(&OPL->P_CH[0], (OPL->noise_rng>>0)&1 ); + } + + lt = output[0]; + + lt >>= FINAL_SH; + + /* limit check */ + lt = limit( lt , MAXOUT, MINOUT ); + + #ifdef SAVE_SAMPLE + SAVE_ALL_CHANNELS + #endif + + /* store to sound buffer */ + buf[i] = lt; + + advance(OPL); + } + +} +#endif /* BUILD_YM3526 */ + + + + +#if BUILD_Y8950 + +static FM_OPL *OPL_Y8950[MAX_OPL_CHIPS]; /* array of pointers to the Y8950's */ +static int Y8950NumChips = 0; /* number of chips */ + +int Y8950Init(int num, int clock, int rate) +{ + int i; + + if (Y8950NumChips) + return -1; /* duplicate init. */ + + Y8950NumChips = num; + + for (i = 0;i < Y8950NumChips; i++) + { + /* emulator create */ + OPL_Y8950[i] = OPLCreate(OPL_TYPE_Y8950,clock,rate); + if(OPL_Y8950[i] == NULL) + { + /* it's really bad - we run out of memeory */ + Y8950NumChips = 0; + return -1; + } + } + + return 0; +} + +void Y8950Shutdown(void) +{ + int i; + + for (i = 0;i < Y8950NumChips; i++) + { + /* emulator shutdown */ + OPLDestroy(OPL_Y8950[i]); + OPL_Y8950[i] = NULL; + } + Y8950NumChips = 0; +} +void Y8950ResetChip(int which) +{ + OPLResetChip(OPL_Y8950[which]); +} + +int Y8950Write(int which, int a, int v) +{ + return OPLWrite(OPL_Y8950[which], a, v); +} + +unsigned char Y8950Read(int which, int a) +{ + return OPLRead(OPL_Y8950[which], a); +} +int Y8950TimerOver(int which, int c) +{ + return OPLTimerOver(OPL_Y8950[which], c); +} + +void Y8950SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset) +{ + OPLSetTimerHandler(OPL_Y8950[which], TimerHandler, channelOffset); +} +void Y8950SetIRQHandler(int which,OPL_IRQHANDLER IRQHandler,int param) +{ + OPLSetIRQHandler(OPL_Y8950[which], IRQHandler, param); +} +void Y8950SetUpdateHandler(int which,OPL_UPDATEHANDLER UpdateHandler,int param) +{ + OPLSetUpdateHandler(OPL_Y8950[which], UpdateHandler, param); +} + +void Y8950SetDeltaTMemory(int which, void * deltat_rom, int deltat_rom_size ) +{ + FM_OPL *OPL = OPL_Y8950[which]; + OPL->deltat->memory = (UINT8 *)(deltat_rom); + OPL->deltat->memory_size = deltat_rom_size; +} + +/* +** Generate samples for one of the Y8950's +** +** 'which' is the virtual Y8950 number +** '*buffer' is the output buffer pointer +** 'length' is the number of samples that should be generated +*/ +void Y8950UpdateOne(int which, INT16 *buffer, int length) +{ + int i; + FM_OPL *OPL = OPL_Y8950[which]; + UINT8 rhythm = OPL->rhythm&0x20; + YM_DELTAT *DELTAT = OPL->deltat; + OPLSAMPLE *buf = buffer; + + /* setup DELTA-T unit */ + YM_DELTAT_DECODE_PRESET(DELTAT); + + if( (void *)OPL != cur_chip ){ + cur_chip = (void *)OPL; + /* rhythm slots */ + SLOT7_1 = &OPL->P_CH[7].SLOT[SLOT1]; + SLOT7_2 = &OPL->P_CH[7].SLOT[SLOT2]; + SLOT8_1 = &OPL->P_CH[8].SLOT[SLOT1]; + SLOT8_2 = &OPL->P_CH[8].SLOT[SLOT2]; + + } + for( i=0; i < length ; i++ ) + { + int lt; + + output[0] = 0; + output_deltat[0] = 0; + + advance_lfo(OPL); + + /* deltaT ADPCM */ + if( DELTAT->portstate ) + YM_DELTAT_ADPCM_CALC(DELTAT); + + /* FM part */ + OPL_CALC_CH(&OPL->P_CH[0]); + OPL_CALC_CH(&OPL->P_CH[1]); + OPL_CALC_CH(&OPL->P_CH[2]); + OPL_CALC_CH(&OPL->P_CH[3]); + OPL_CALC_CH(&OPL->P_CH[4]); + OPL_CALC_CH(&OPL->P_CH[5]); + + if(!rhythm) + { + OPL_CALC_CH(&OPL->P_CH[6]); + OPL_CALC_CH(&OPL->P_CH[7]); + OPL_CALC_CH(&OPL->P_CH[8]); + } + else /* Rhythm part */ + { + OPL_CALC_RH(&OPL->P_CH[0], (OPL->noise_rng>>0)&1 ); + } + + lt = output[0] + (output_deltat[0]>>11); + + lt >>= FINAL_SH; + + /* limit check */ + lt = limit( lt , MAXOUT, MINOUT ); + + #ifdef SAVE_SAMPLE + SAVE_ALL_CHANNELS + #endif + + /* store to sound buffer */ + buf[i] = lt; + + advance(OPL); + } + + /* deltaT START flag */ + if( !DELTAT->portstate ) + OPL->status &= 0xfe; + + if( DELTAT->eos ) //AT: set bit 4 of OPL status register on EOS + { + DELTAT->eos = 0; + OPL->status |= 0x10; + } +} + +void Y8950SetPortHandler(int which,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param) +{ + FM_OPL *OPL = OPL_Y8950[which]; + OPL->porthandler_w = PortHandler_w; + OPL->porthandler_r = PortHandler_r; + OPL->port_param = param; +} + +void Y8950SetKeyboardHandler(int which,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param) +{ + FM_OPL *OPL = OPL_Y8950[which]; + OPL->keyboardhandler_w = KeyboardHandler_w; + OPL->keyboardhandler_r = KeyboardHandler_r; + OPL->keyboard_param = param; +} + +#endif + diff --git a/sound/fmopl.h b/sound/fmopl.h index 8fbeb175e3..ac83e6ba58 100644 --- a/sound/fmopl.h +++ b/sound/fmopl.h @@ -18,135 +18,120 @@ * * $Header$ * - * LGPL licensed version of MAMEs fmopl (V0.37a modified) by - * Tatsuyuki Satoh. Included from LGPL'ed AdPlug. + * LGPL licensed version of MAMEs fmopl (V0.60a modified) by + * Tatsuyuki Satoh and Jarek Burczynski. Included from LGPL'ed AdPlug. */ - #ifndef __FMOPL_H_ #define __FMOPL_H_ -#include "scummsys.h" + +#define HAS_YM3812 1 + +/* --- select emulation chips --- */ +#define BUILD_YM3812 (HAS_YM3812) +#define BUILD_YM3526 (HAS_YM3526) +#define BUILD_Y8950 (HAS_Y8950) + +/* select output bits size of output : 8 or 16 */ +#define OPL_SAMPLE_BITS 16 + +/* compiler dependence */ +#ifndef OSD_CPU_H +#define OSD_CPU_H +typedef unsigned char UINT8; /* unsigned 8bit */ +typedef unsigned short UINT16; /* unsigned 16bit */ +typedef unsigned int UINT32; /* unsigned 32bit */ +typedef signed char INT8; /* signed 8bit */ +typedef signed short INT16; /* signed 16bit */ +typedef signed int INT32; /* signed 32bit */ +#endif + +#if (OPL_SAMPLE_BITS==16) +typedef INT16 OPLSAMPLE; +#endif +#if (OPL_SAMPLE_BITS==8) +typedef INT8 OPLSAMPLE; +#endif + typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec); typedef void (*OPL_IRQHANDLER)(int param,int irq); typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us); +typedef void (*OPL_PORTHANDLER_W)(int param,unsigned char data); +typedef unsigned char (*OPL_PORTHANDLER_R)(int param); + + +#if BUILD_YM3812 + +int YM3812Init(int num, int clock, int rate); +void YM3812Shutdown(void); +void YM3812ResetChip(int which); +int YM3812Write(int which, int a, int v); +unsigned char YM3812Read(int which, int a); +int YM3812TimerOver(int which, int c); +void YM3812UpdateOne(int which, INT16 *buffer, int length); + +void YM3812SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset); +void YM3812SetIRQHandler(int which, OPL_IRQHANDLER IRQHandler, int param); +void YM3812SetUpdateHandler(int which, OPL_UPDATEHANDLER UpdateHandler, int param); + +#endif + + +#if BUILD_YM3526 + +/* +** Initialize YM3526 emulator(s). +** +** 'num' is the number of virtual YM3526's to allocate +** 'clock' is the chip clock in Hz +** 'rate' is sampling rate +*/ +int YM3526Init(int num, int clock, int rate); +/* shutdown the YM3526 emulators*/ +void YM3526Shutdown(void); +void YM3526ResetChip(int which); +int YM3526Write(int which, int a, int v); +unsigned char YM3526Read(int which, int a); +int YM3526TimerOver(int which, int c); +/* +** Generate samples for one of the YM3526's +** +** 'which' is the virtual YM3526 number +** '*buffer' is the output buffer pointer +** 'length' is the number of samples that should be generated +*/ +void YM3526UpdateOne(int which, INT16 *buffer, int length); + +void YM3526SetTimerHandler(int which, OPL_TIMERHANDLER TimerHandler, int channelOffset); +void YM3526SetIRQHandler(int which, OPL_IRQHANDLER IRQHandler, int param); +void YM3526SetUpdateHandler(int which, OPL_UPDATEHANDLER UpdateHandler, int param); + +#endif + + +#if BUILD_Y8950 + +#include "ymdeltat.h" + +/* Y8950 port handlers */ +void Y8950SetPortHandler(int which, OPL_PORTHANDLER_W PortHandler_w, OPL_PORTHANDLER_R PortHandler_r, int param); +void Y8950SetKeyboardHandler(int which, OPL_PORTHANDLER_W KeyboardHandler_w, OPL_PORTHANDLER_R KeyboardHandler_r, int param); +void Y8950SetDeltaTMemory(int which, void * deltat_rom, int deltat_rom_size ); + +int Y8950Init (int num, int clock, int rate); +void Y8950Shutdown (void); +void Y8950ResetChip (int which); +int Y8950Write (int which, int a, int v); +unsigned char Y8950Read (int which, int a); +int Y8950TimerOver (int which, int c); +void Y8950UpdateOne (int which, INT16 *buffer, int length); + +void Y8950SetTimerHandler (int which, OPL_TIMERHANDLER TimerHandler, int channelOffset); +void Y8950SetIRQHandler (int which, OPL_IRQHANDLER IRQHandler, int param); +void Y8950SetUpdateHandler (int which, OPL_UPDATEHANDLER UpdateHandler, int param); + +#endif + -#define OPL_TYPE_WAVESEL 0x01 /* waveform select */ - -/* Saving is necessary for member of the 'R' mark for suspend/resume */ -/* ---------- OPL one of slot ---------- */ -typedef struct fm_opl_slot { - int TL; /* total level :TL << 8 */ - int TLL; /* adjusted now TL */ - uint8 KSR; /* key scale rate :(shift down bit) */ - int *AR; /* attack rate :&AR_TABLE[AR<<2] */ - int *DR; /* decay rate :&DR_TABLE[DR<<2] */ - int SL; /* sustain level :SL_TABLE[SL] */ - int *RR; /* release rate :&DR_TABLE[RR<<2] */ - uint8 ksl; /* keyscale level :(shift down bits) */ - uint8 ksr; /* key scale rate :kcode>>KSR */ - uint mul; /* multiple :ML_TABLE[ML] */ - uint Cnt; /* frequency count */ - uint Incr; /* frequency step */ - - /* envelope generator state */ - uint8 eg_typ;/* envelope type flag */ - uint8 evm; /* envelope phase */ - int evc; /* envelope counter */ - int eve; /* envelope counter end point */ - int evs; /* envelope counter step */ - int evsa; /* envelope step for AR :AR[ksr] */ - int evsd; /* envelope step for DR :DR[ksr] */ - int evsr; /* envelope step for RR :RR[ksr] */ - - /* LFO */ - uint8 ams; /* ams flag */ - uint8 vib; /* vibrate flag */ - /* wave selector */ - int **wavetable; -} OPL_SLOT; - -/* ---------- OPL one of channel ---------- */ -typedef struct fm_opl_channel { - OPL_SLOT SLOT[2]; - uint8 CON; /* connection type */ - uint8 FB; /* feed back :(shift down bit)*/ - int *connect1; /* slot1 output pointer */ - int *connect2; /* slot2 output pointer */ - int op1_out[2]; /* slot1 output for selfeedback */ - - /* phase generator state */ - uint block_fnum; /* block+fnum */ - uint8 kcode; /* key code : KeyScaleCode */ - uint fc; /* Freq. Increment base */ - uint ksl_base; /* KeyScaleLevel Base step */ - uint8 keyon; /* key on/off flag */ -} OPL_CH; - -/* OPL state */ -typedef struct fm_opl_f { - uint8 type; /* chip type */ - int clock; /* master clock (Hz) */ - int rate; /* sampling rate (Hz) */ - double freqbase; /* frequency base */ - double TimerBase; /* Timer base time (==sampling time) */ - uint8 address; /* address register */ - uint8 status; /* status flag */ - uint8 statusmask; /* status mask */ - uint mode; /* Reg.08 : CSM , notesel,etc. */ - - /* Timer */ - int T[2]; /* timer counter */ - uint8 st[2]; /* timer enable */ - - /* FM channel slots */ - OPL_CH *P_CH; /* pointer of CH */ - int max_ch; /* maximum channel */ - - /* Rythm sention */ - uint8 rythm; /* Rythm mode , key flag */ - - /* time tables */ - int AR_TABLE[75]; /* atttack rate tables */ - int DR_TABLE[75]; /* decay rate tables */ - uint FN_TABLE[1024];/* fnumber -> increment counter */ - - /* LFO */ - int *ams_table; - int *vib_table; - int amsCnt; - int amsIncr; - int vibCnt; - int vibIncr; - - /* wave selector enable flag */ - uint8 wavesel; - - /* external event callback handler */ - OPL_TIMERHANDLER TimerHandler; /* TIMER handler */ - int TimerParam; /* TIMER parameter */ - OPL_IRQHANDLER IRQHandler; /* IRQ handler */ - int IRQParam; /* IRQ parameter */ - OPL_UPDATEHANDLER UpdateHandler; /* stream update handler */ - int UpdateParam; /* stream update parameter */ -} FM_OPL; - -/* ---------- Generic interface section ---------- */ -#define OPL_TYPE_YM3526 (0) -#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) - -void OPLBuildTables(int ENV_BITS_PARAM, int EG_ENT_PARAM); - -FM_OPL *OPLCreate(int type, int clock, int rate); -void OPLDestroy(FM_OPL *OPL); -void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler, int channelOffset); -void OPLSetIRQHandler(FM_OPL *OPL, OPL_IRQHANDLER IRQHandler, int param); -void OPLSetUpdateHandler(FM_OPL *OPL, OPL_UPDATEHANDLER UpdateHandler, int param); - -void OPLResetChip(FM_OPL *OPL); -int OPLWrite(FM_OPL *OPL, int a, int v); -unsigned char OPLRead(FM_OPL *OPL, int a); -int OPLTimerOver(FM_OPL *OPL, int c); -void OPLWriteReg(FM_OPL *OPL, int r, int v); -void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length); #endif |