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qemu/hw/audio/fmopl.c
Philippe Mathieu-Daudé 2eea51bd01 hw/audio/fmopl: Move ENV_CURVE to .heap to save 32KiB of .bss 
This buffer is only used by the adlib audio device. Move it to
the .heap to release 32KiB of .bss (size reported on x86_64 host).

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-16 23:02:24 +01:00

1212 lines
30 KiB
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/*
**
** File: fmopl.c -- software implementation of FM sound generator
**
** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development
**
** Version 0.37a
**
*/
/*
preliminary :
Problem :
note:
*/
/* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include <math.h>
//#include "driver.h" /* use M.A.M.E. */
#include "fmopl.h"
#ifndef PI
#define PI 3.14159265358979323846
#endif
/* -------------------- for debug --------------------- */
/* #define OPL_OUTPUT_LOG */
#ifdef OPL_OUTPUT_LOG
static FILE *opl_dbg_fp = NULL;
static FM_OPL *opl_dbg_opl[16];
static int opl_dbg_maxchip,opl_dbg_chip;
#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 DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */
#define FREQ_BITS 24 /* frequency turn */
/* counter bits = 20 , octerve 7 */
#define FREQ_RATE (1<<(FREQ_BITS-20))
#define TL_BITS (FREQ_BITS+2)
/* 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 --------------------- */
/* sinwave entries */
/* used static memory = SIN_ENT * 4 (byte) */
#define SIN_ENT 2048
/* output level entries (envelope,sinwave) */
/* envelope counter lower bits */
#define ENV_BITS 16
/* envelope output entries */
#define EG_ENT 4096
/* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
/* used static memory = EG_ENT*4 (byte) */
#define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */
#define EG_DED EG_OFF
#define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */
#define EG_AED EG_DST
#define EG_AST 0 /* ATTACK START */
#define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */
/* LFO table entries */
#define VIB_ENT 512
#define VIB_SHIFT (32-9)
#define AMS_ENT 512
#define AMS_SHIFT (32-9)
#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
/* -------------------- tables --------------------- */
static const int slot_array[32]=
{
0, 2, 4, 1, 3, 5,-1,-1,
6, 8,10, 7, 9,11,-1,-1,
12,14,16,13,15,17,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1
};
/* key scale level */
/* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
#define DV (EG_STEP/2)
static const uint32_t KSL_TABLE[8*16]=
{
/* OCT 0 */
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
/* OCT 1 */
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV,
1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
/* OCT 2 */
0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
/* OCT 3 */
0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
/* OCT 4 */
0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
10.875/DV,11.250/DV,11.625/DV,12.000/DV,
/* OCT 5 */
0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
9.000/DV,10.125/DV,10.875/DV,11.625/DV,
12.000/DV,12.750/DV,13.125/DV,13.500/DV,
13.875/DV,14.250/DV,14.625/DV,15.000/DV,
/* OCT 6 */
0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
12.000/DV,13.125/DV,13.875/DV,14.625/DV,
15.000/DV,15.750/DV,16.125/DV,16.500/DV,
16.875/DV,17.250/DV,17.625/DV,18.000/DV,
/* OCT 7 */
0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
15.000/DV,16.125/DV,16.875/DV,17.625/DV,
18.000/DV,18.750/DV,19.125/DV,19.500/DV,
19.875/DV,20.250/DV,20.625/DV,21.000/DV
};
#undef DV
/* sustain lebel 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) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST
static const int32_t SL_TABLE[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
#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 int32_t *TL_TABLE;
/* pointers to TL_TABLE with sinwave output offset */
static int32_t **SIN_TABLE;
/* LFO table */
static int32_t *AMS_TABLE;
static int32_t *VIB_TABLE;
/* envelope output curve table */
/* attack + decay + OFF */
static int32_t *ENV_CURVE;
/* multiple table */
#define ML 2
static const uint32_t MUL_TABLE[16]= {
/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
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*ML
};
#undef ML
/* dummy attack / decay rate ( when rate == 0 ) */
static int32_t RATE_0[16]=
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
/* -------------------- 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;
static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
static int32_t outd[1];
static int32_t ams;
static int32_t vib;
static int32_t *ams_table;
static int32_t *vib_table;
static int32_t amsIncr;
static int32_t vibIncr;
static int32_t feedback2; /* connect for SLOT 2 */
/* log output level */
#define LOG_ERR 3 /* ERROR */
#define LOG_WAR 2 /* WARNING */
#define LOG_INF 1 /* INFORMATION */
//#define LOG_LEVEL LOG_INF
#define LOG_LEVEL LOG_ERR
//#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
#define LOG(n,x)
/* --------------------- subroutines --------------------- */
static inline int Limit( int val, int max, int min ) {
if ( val > max )
val = max;
else if ( val < min )
val = min;
return val;
}
/* status set and IRQ handling */
static 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 */
OPL->status |= 0x80;
}
}
}
/* status reset and IRQ handling */
static 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 &= 0x7f;
}
}
}
/* IRQ mask set */
static 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 ----- */
static 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 ----- */
static 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;
}
}
/* ---------- calcrate Envelope Generator & Phase Generator ---------- */
/* return : envelope output */
static inline uint32_t 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;
}
break;
case ENV_MOD_RR: /* RR -> OFF */
SLOT->evc = EG_OFF;
SLOT->eve = EG_OFF+1;
SLOT->evs = 0;
break;
}
}
/* calcrate envelope */
return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
}
/* set algorithm connection */
static void set_algorithm( OPL_CH *CH)
{
int32_t *carrier = &outd[0];
CH->connect1 = CH->CON ? carrier : &feedback2;
CH->connect2 = carrier;
}
/* ---------- frequency counter for operater update ---------- */
static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
{
int ksr;
/* frequency step counter */
SLOT->Incr = CH->fc * SLOT->mul;
ksr = CH->kcode >> SLOT->KSR;
if( SLOT->ksr != ksr )
{
SLOT->ksr = ksr;
/* attack , decay rate recalcration */
SLOT->evsa = SLOT->AR[ksr];
SLOT->evsd = SLOT->DR[ksr];
SLOT->evsr = SLOT->RR[ksr];
}
SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
}
/* set multi,am,vib,EG-TYP,KSR,mul */
static 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);
}
/* set ksl & tl */
static 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 */
SLOT->ksl = ksl ? 3-ksl : 31;
SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */
if( !(OPL->mode&0x80) )
{ /* not CSM latch total level */
SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
}
}
/* set attack rate & decay rate */
static 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;
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;
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;
}
/* set sustain level & release rate */
static 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 ---------- */
static inline void OPL_CALC_CH( OPL_CH *CH )
{
uint32_t env_out;
OPL_SLOT *SLOT;
feedback2 = 0;
/* SLOT 1 */
SLOT = &CH->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->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;
}
/* SLOT 2 */
SLOT = &CH->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);
else SLOT->Cnt += SLOT->Incr;
/* connectoion */
outd[0] += OP_OUT(SLOT,env_out, feedback2);
}
}
/* ---------- calcrate rhythm block ---------- */
#define WHITE_NOISE_db 6.0
static inline void OPL_CALC_RH( OPL_CH *CH )
{
uint32_t env_tam,env_sd,env_top,env_hh;
int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP);
int32_t tone8;
OPL_SLOT *SLOT;
int env_out;
/* BD : same as FM serial mode and output level is large */
feedback2 = 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;
}
/* 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);
else SLOT->Cnt += SLOT->Incr;
/* connectoion */
outd[0] += OP_OUT(SLOT,env_out, feedback2)*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 < EG_ENT-1 )
outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8;
/* TAM */
if( env_tam < EG_ENT-1 )
outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2;
/* TOP-CY */
if( env_top < EG_ENT-1 )
outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2;
/* HH */
if( env_hh < 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] = rate / ARRATE;
OPL->DR_TABLE[i] = rate / DRRATE;
}
for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++)
{
OPL->AR_TABLE[i] = EG_AED-1;
OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
}
#if 0
for (i = 0;i < 64 ;i++){ /* make for overflow area */
LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i,
((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
}
#endif
}
/* ---------- generic table initialize ---------- */
static int OPLOpenTable( void )
{
int s,t;
double rate;
int i,j;
double pom;
/* allocate dynamic tables */
if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL)
return 0;
if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL)
{
free(TL_TABLE);
return 0;
}
if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL)
{
free(TL_TABLE);
free(SIN_TABLE);
return 0;
}
if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL)
{
free(TL_TABLE);
free(SIN_TABLE);
free(AMS_TABLE);
return 0;
}
/* 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];
/* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/
}
/* fill volume off area */
for ( t = EG_ENT-1; t < TL_MAX ;t++){
TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
}
/* 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 = 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];
/* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/
}
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];
}
/* 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;
}
/* 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] = (1.0/EG_STEP)*pom; /* 1dB */
AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */
}
/* 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] = VIB_RATE + (pom*0.07); /* +- 7cent */
VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */
/* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */
}
return 1;
}
static void OPLCloseTable( void )
{
free(TL_TABLE);
free(SIN_TABLE);
free(AMS_TABLE);
free(VIB_TABLE);
}
/* CSM Key Control */
static 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_initialize(FM_OPL *OPL)
{
int fn;
/* 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] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2;
}
/* LFO freq.table */
OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0;
OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0;
}
/* ---------- write a OPL registers ---------- */
static void OPLWriteReg(FM_OPL *OPL, int r, int v)
{
OPL_CH *CH;
int slot;
int block_fnum;
switch(r&0xe0)
{
case 0x00: /* 00-1f:control */
switch(r&0x1f)
{
case 0x01:
/* wave selector enable */
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];
}
}
return;
case 0x02: /* Timer 1 */
OPL->T[0] = (256-v)*4;
break;
case 0x03: /* Timer 2 */
OPL->T[1] = (256-v)*16;
return;
case 0x04: /* IRQ clear / mask and Timer enable */
if(v&0x80)
{ /* IRQ flag clear */
OPL_STATUS_RESET(OPL,0x7f);
}
else
{ /* set IRQ mask ,timer enable*/
uint8_t st1 = v&1;
uint8_t 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);
/* timer 2 */
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);
}
}
/* timer 1 */
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);
}
}
}
return;
}
break;
case 0x20: /* am,vib,ksr,eg type,mul */
slot = slot_array[r&0x1f];
if(slot == -1) return;
set_mul(OPL,slot,v);
return;
case 0x40:
slot = slot_array[r&0x1f];
if(slot == -1) return;
set_ksl_tl(OPL,slot,v);
return;
case 0x60:
slot = slot_array[r&0x1f];
if(slot == -1) return;
set_ar_dr(OPL,slot,v);
return;
case 0x80:
slot = slot_array[r&0x1f];
if(slot == -1) return;
set_sl_rr(OPL,slot,v);
return;
case 0xa0:
switch(r)
{
case 0xbd:
/* amsep,vibdep,r,bd,sd,tom,tc,hh */
{
uint8_t rkey = OPL->rhythm^v;
OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0];
OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0];
OPL->rhythm = v&0x3f;
if(OPL->rhythm&0x20)
{
#if 0
usrintf_showmessage("OPL Rhythm mode select");
#endif
/* 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]);
}
/* 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]);
}
/* 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]);
}
}
}
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;
}
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]);
}
}
}
/* update */
if(CH->block_fnum != block_fnum)
{
int blockRv = 7-(block_fnum>>10);
int fnum = block_fnum&0x3ff;
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;
CALC_FCSLOT(CH,&CH->SLOT[SLOT1]);
CALC_FCSLOT(CH,&CH->SLOT[SLOT2]);
}
return;
case 0xc0:
/* FB,C */
if( (r&0x0f) > 8) return;
CH = &OPL->P_CH[r&0x0f];
{
int feedback = (v>>1)&7;
CH->FB = feedback ? (8+1) - feedback : 0;
CH->CON = v&1;
set_algorithm(CH);
}
return;
case 0xe0: /* wave type */
slot = slot_array[r&0x1f];
if(slot == -1) return;
CH = &OPL->P_CH[slot/2];
if(OPL->wavesel)
{
/* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */
CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT];
}
return;
}
}
/* lock/unlock for common table */
static int OPL_LockTable(void)
{
num_lock++;
if(num_lock>1) return 0;
/* first time */
cur_chip = NULL;
/* allocate total level table (128kb space) */
if( !OPLOpenTable() )
{
num_lock--;
return -1;
}
return 0;
}
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_t *buffer, int length)
{
int i;
int data;
int16_t *buf = buffer;
uint32_t amsCnt = OPL->amsCnt;
uint32_t vibCnt = OPL->vibCnt;
uint8_t rhythm = OPL->rhythm&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];
/* rhythm 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 = rhythm ? &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(rhythm)
OPL_CALC_RH(S_CH);
/* limit check */
data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
/* store to sound buffer */
buf[i] = data >> OPL_OUTSB;
}
OPL->amsCnt = amsCnt;
OPL->vibCnt = vibCnt;
#ifdef OPL_OUTPUT_LOG
if(opl_dbg_fp)
{
for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256);
}
#endif
}
/* ---------- reset one of chip ---------- */
static void OPLResetChip(FM_OPL *OPL)
{
int c,s;
int i;
/* reset chip */
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 parameter */
for( c = 0 ; c < OPL->max_ch ; c++ )
{
OPL_CH *CH = &OPL->P_CH[c];
/* OPL->P_CH[c].PAN = OPN_CENTER; */
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;
}
}
}
/* ---------- Create one of virtual YM3812 ---------- */
/* 'rate' is sampling rate and 'bufsiz' is the size of the */
FM_OPL *OPLCreate(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 */
state_size = sizeof(FM_OPL);
state_size += sizeof(OPL_CH)*max_ch;
/* allocate memory block */
ptr = 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;
/* set channel state pointer */
OPL->clock = clock;
OPL->rate = rate;
OPL->max_ch = max_ch;
ENV_CURVE = g_new(int32_t, 2 * EG_ENT + 1);
/* init grobal tables */
OPL_initialize(OPL);
/* reset chip */
OPLResetChip(OPL);
#ifdef OPL_OUTPUT_LOG
if(!opl_dbg_fp)
{
opl_dbg_fp = fopen("opllog.opl","wb");
opl_dbg_maxchip = 0;
}
if(opl_dbg_fp)
{
opl_dbg_opl[opl_dbg_maxchip] = OPL;
fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip,
type,
clock&0xff,
(clock/0x100)&0xff,
(clock/0x10000)&0xff,
(clock/0x1000000)&0xff);
opl_dbg_maxchip++;
}
#endif
return OPL;
}
/* ---------- Destroy one of virtual YM3812 ---------- */
void OPLDestroy(FM_OPL *OPL)
{
#ifdef OPL_OUTPUT_LOG
if(opl_dbg_fp)
{
fclose(opl_dbg_fp);
opl_dbg_fp = NULL;
}
#endif
OPL_UnLockTable();
free(OPL);
g_free(ENV_CURVE);
}
/* ---------- Option handlers ---------- */
void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,
void *param)
{
OPL->TimerHandler = TimerHandler;
OPL->TimerParam = param;
}
/* ---------- YM3812 I/O interface ---------- */
int OPLWrite(FM_OPL *OPL,int a,int v)
{
if( !(a&1) )
{ /* address port */
OPL->address = v & 0xff;
}
else
{ /* data port */
#ifdef OPL_OUTPUT_LOG
if(opl_dbg_fp)
{
for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v);
}
#endif
OPLWriteReg(OPL,OPL->address,v);
}
return OPL->status>>7;
}
unsigned char OPLRead(FM_OPL *OPL,int a)
{
if( !(a&1) )
{ /* status port */
return OPL->status & (OPL->statusmask|0x80);
}
/* data port */
switch(OPL->address)
{
case 0x05: /* KeyBoard IN */
return 0;
#if 0
case 0x0f: /* ADPCM-DATA */
return 0;
#endif
case 0x19: /* I/O DATA */
return 0;
case 0x1a: /* PCM-DATA */
return 0;
}
return 0;
}
int OPLTimerOver(FM_OPL *OPL,int c)
{
if( c )
{ /* Timer B */
OPL_STATUS_SET(OPL,0x20);
}
else
{ /* Timer A */
OPL_STATUS_SET(OPL,0x40);
/* CSM mode key,TL control */
if( OPL->mode & 0x80 )
{ /* CSM mode total level latch and auto key on */
int ch;
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;
}
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