Added NSF decoder plugin. Fixes 151192.

Original commit message from CVS:
Based on patches by: Johan Dahlin <johan at gnome dot org>
Ronald Bultje <rbultje at ronald dot bitfreak dot net>
* configure.ac:
* gst/nsf/Makefile.am:
* gst/nsf/dis6502.h:
* gst/nsf/fds_snd.c:
* gst/nsf/fds_snd.h:
* gst/nsf/fmopl.c:
* gst/nsf/fmopl.h:
* gst/nsf/gstnsf.c:
* gst/nsf/gstnsf.h:
* gst/nsf/log.c:
* gst/nsf/log.h:
* gst/nsf/memguard.c:
* gst/nsf/memguard.h:
* gst/nsf/mmc5_snd.c:
* gst/nsf/mmc5_snd.h:
* gst/nsf/nes6502.c:
* gst/nsf/nes6502.h:
* gst/nsf/nes_apu.c:
* gst/nsf/nes_apu.h:
* gst/nsf/nsf.c:
* gst/nsf/nsf.h:
* gst/nsf/osd.h:
* gst/nsf/types.h:
* gst/nsf/vrc7_snd.c:
* gst/nsf/vrc7_snd.h:
* gst/nsf/vrcvisnd.c:
* gst/nsf/vrcvisnd.h:
Added NSF decoder plugin. Fixes 151192.

1 files changed, 1392 insertions, 0 deletions

diff --git a/gst/nsf/fmopl.c b/gst/nsf/fmopl.c
new file mode 100644
index 00000000..c1e321f3
--- /dev/null
+++ b/gst/nsf/fmopl.c
@@ -0,0 +1,1392 @@
+/*
+**
+** File: fmopl.c -- software implementation of FM sound generator
+**
+** Copyright (C) 1999 Tatsuyuki Satoh , MultiArcadeMachineEmurator development
+**
+** Version 0.36f
+**
+*/
+
+/*
+	preliminary :
+	Problem :
+	note:
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <math.h>
+                                        /* #include "driver.h" *//* use M.A.M.E. */
+#include "fmopl.h"
+
+/* MPC - hacks */
+#include "types.h"
+#include "log.h"
+
+#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 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 */
+#define ML(x) ((UINT32)((x)*0.1875*2/EG_STEP))
+static const UINT32 KSL_TABLE[8 * 16] = {
+  /* OCT 0 */
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  /* OCT 1 */
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (0.750), ML (1.125), ML (1.500),
+  ML (1.875), ML (2.250), ML (2.625), ML (3.000),
+  /* OCT 2 */
+  ML (0.000), ML (0.000), ML (0.000), ML (0.000),
+  ML (0.000), ML (1.125), ML (1.875), ML (2.625),
+  ML (3.000), ML (3.750), ML (4.125), ML (4.500),
+  ML (4.875), ML (5.250), ML (5.625), ML (6.000),
+  /* OCT 3 */
+  ML (0.000), ML (0.000), ML (0.000), ML (1.875),
+  ML (3.000), ML (4.125), ML (4.875), ML (5.625),
+  ML (6.000), ML (6.750), ML (7.125), ML (7.500),
+  ML (7.875), ML (8.250), ML (8.625), ML (9.000),
+  /* OCT 4 */
+  ML (0.000), ML (0.000), ML (3.000), ML (4.875),
+  ML (6.000), ML (7.125), ML (7.875), ML (8.625),
+  ML (9.000), ML (9.750), ML (10.125), ML (10.500),
+  ML (10.875), ML (11.250), ML (11.625), ML (12.000),
+  /* OCT 5 */
+  ML (0.000), ML (3.000), ML (6.000), ML (7.875),
+  ML (9.000), ML (10.125), ML (10.875), ML (11.625),
+  ML (12.000), ML (12.750), ML (13.125), ML (13.500),
+  ML (13.875), ML (14.250), ML (14.625), ML (15.000),
+  /* OCT 6 */
+  ML (0.000), ML (6.000), ML (9.000), ML (10.875),
+  ML (12.000), ML (13.125), ML (13.875), ML (14.625),
+  ML (15.000), ML (15.750), ML (16.125), ML (16.500),
+  ML (16.875), ML (17.250), ML (17.625), ML (18.000),
+  /* OCT 7 */
+  ML (0.000), ML (9.000), ML (12.000), ML (13.875),
+  ML (15.000), ML (16.125), ML (16.875), ML (17.625),
+  ML (18.000), ML (18.750), ML (19.125), ML (19.500),
+  ML (19.875), ML (20.250), ML (20.625), ML (21.000)
+};
+
+#undef ML
+
+/* 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) ((INT32) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST)
+static const INT32 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 union
+{
+  INT32 *TABLE;
+  void *TABLE_PTR;
+} TL;
+
+/* pointers to TL.TABLE with sinwave output offset */
+static union
+{
+  INT32 **TABLE;
+  void *TABLE_PTR;
+} SIN;
+
+/* LFO table */
+static union
+{
+  INT32 *TABLE;
+  void *TABLE_PTR;
+} AMS;
+
+static union
+{
+  INT32 *TABLE;
+  void *TABLE_PTR;
+} VIB;
+
+/* envelope output curve table */
+/* attack + decay + OFF */
+static INT32 ENV_CURVE[2 * EG_ENT + 1];
+
+/* multiple table */
+#define ML(x) ((UINT32) (2*(x)))
+static const UINT32 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)
+};
+
+#undef ML
+
+/* dummy attack / decay rate ( when rate == 0 ) */
+static INT32 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 FMSAMPLE  *bufL,*bufR; */
+static OPL_CH *S_CH;
+static OPL_CH *E_CH;
+OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
+
+static INT32 outd[1];
+static INT32 ams;
+static INT32 vib;
+INT32 *ams_table;
+INT32 *vib_table;
+static INT32 amsIncr;
+static INT32 vibIncr;
+static INT32 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(n,x) if( (n)>=LOG_LEVEL ) logerror x */
+#define LOG(n,x) if( (n)>=LOG_LEVEL ) log_printf x
+
+/* --------------------- subroutines  --------------------- */
+
+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 */
+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;
+      /* callback user interrupt handler (IRQ is OFF to ON) */
+      if (OPL->IRQHandler)
+        (OPL->IRQHandler) (OPL->IRQParam, 1);
+    }
+  }
+}
+
+/* status reset and IRQ handling */
+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;
+      /* callback user interrupt handler (IRQ is ON to OFF) */
+      if (OPL->IRQHandler)
+        (OPL->IRQHandler) (OPL->IRQParam, 0);
+    }
+  }
+}
+
+/* IRQ mask set */
+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;
+  }
+}
+
+/* ---------- calcrate Envelope Generator & Phase Generator ---------- */
+/* return : envelope output */
+INLINE UINT32
+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 algorythm connection */
+static void
+set_algorythm (OPL_CH * CH)
+{
+  INT32 *carrier = &outd[0];
+
+  CH->connect1 = CH->CON ? carrier : &feedback2;
+  CH->connect2 = carrier;
+}
+
+/* ---------- frequency counter for operater update ---------- */
+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 */
+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 */
+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 = (INT32) (((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  */
+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 */
+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)
+{
+  UINT32 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 rythm block ---------- */
+#define WHITE_NOISE_db 6.0
+INLINE void
+OPL_CALC_RH (OPL_CH * CH)
+{
+  UINT32 env_tam, env_sd, env_top, env_hh;
+  int whitenoise = (rand () & 1) * ((int) (WHITE_NOISE_db / EG_STEP));
+  INT32 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] = (INT32) (rate / ARRATE);
+    OPL->DR_TABLE[i] = (INT32) (rate / DRRATE);
+  }
+  for (i = 60; i < 76; 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))) == NULL)
+    return 0;
+  if ((SIN.TABLE = malloc (SIN_ENT * 4 * sizeof (INT32 *))) == NULL) {
+    free (TL.TABLE_PTR);
+    return 0;
+  }
+  if ((AMS.TABLE = malloc (AMS_ENT * 2 * sizeof (INT32))) == NULL) {
+    free (TL.TABLE_PTR);
+    free (SIN.TABLE_PTR);
+    return 0;
+  }
+  if ((VIB.TABLE = malloc (VIB_ENT * 2 * sizeof (INT32))) == NULL) {
+    free (TL.TABLE_PTR);
+    free (SIN.TABLE_PTR);
+    free (AMS.TABLE_PTR);
+    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 = (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];
+/*		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] = (INT32) ((1.0 / EG_STEP) * pom);     /* 1dB   */
+    AMS.TABLE[AMS_ENT + i] = (INT32) ((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 + (INT32) (pom * 0.07);     /* +- 7cent */
+    VIB.TABLE[VIB_ENT + i] = VIB_RATE + (INT32) (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_PTR);
+  free (SIN.TABLE_PTR);
+  free (AMS.TABLE_PTR);
+  free (VIB.TABLE_PTR);
+}
+
+/* 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;
+
+  /* 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] =
+        (UINT32) (OPL->freqbase * fn * FREQ_RATE * (1 << 7) / 2);
+  }
+  /* LFO freq.table */
+  OPL->amsIncr =
+      (INT32) (OPL->rate ? (double) AMS_ENT * (1 << AMS_SHIFT) / OPL->rate *
+      3.7 * ((double) OPL->clock / 3600000) : 0);
+  OPL->vibIncr =
+      (INT32) (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;
+  unsigned int 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];
+              }
+            }
+          }
+          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 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);
+            /* 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;
+#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
+              LOG (LOG_WAR, ("OPL:write unmapped KEYBOARD port\n"));
+          }
+          return;
+        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);
+          return;
+        case 0x08:             /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */
+          OPL->mode = v;
+          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);
+          return;
+#if 0
+        case 0x15:             /* DAC data    */
+        case 0x16:
+        case 0x17:             /* SHIFT    */
+          return;
+        case 0x18:             /* I/O CTRL (Direction) */
+          if (OPL->type & OPL_TYPE_IO)
+            OPL->portDirection = v & 0x0f;
+          return;
+        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);
+          }
+          return;
+        case 0x1a:             /* PCM data */
+          return;
+#endif
+#endif
+      }
+      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 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) {
+#if 0
+            usrintf_showmessage ("OPL Rythm 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_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) {
+        /* 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 ();
+}
+
+#if (BUILD_YM3812 || BUILD_YM3526)
+/*******************************************************************************/
+/*		YM3812 local section                                                   */
+/*******************************************************************************/
+
+/* ---------- update one of chip ----------- */
+void
+YM3812UpdateOne (FM_OPL * OPL, INT16 * buffer, int length)
+{
+  int i;
+  int data;
+  FMSAMPLE *buf = buffer;
+  UINT32 amsCnt = OPL->amsCnt;
+  UINT32 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;
+  }
+
+  OPL->amsCnt = amsCnt;
+  OPL->vibCnt = vibCnt;
+}
+#endif /* (BUILD_YM3812 || BUILD_YM3526) */
+
+#if BUILD_Y8950
+
+void
+Y8950UpdateOne (FM_OPL * OPL, INT16 * buffer, int length)
+{
+  int i;
+  int data;
+  FMSAMPLE *buf = buffer;
+  UINT32 amsCnt = OPL->amsCnt;
+  UINT32 vibCnt = OPL->vibCnt;
+  UINT8 rythm = OPL->rythm & 0x20;
+  OPL_CH *CH, *R_CH;
+  YM_DELTAT *DELTAT = OPL->deltat;
+
+  /* setup DELTA-T unit */
+  YM_DELTAT_DECODE_PRESET (DELTAT);
+
+  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;
+    /* deltaT ADPCM */
+    if (DELTAT->flag)
+      YM_DELTAT_ADPCM_CALC (DELTAT);
+    /* 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;
+  }
+  OPL->amsCnt = amsCnt;
+  OPL->vibCnt = vibCnt;
+  /* deltaT START flag */
+  if (!DELTAT->flag)
+    OPL->status &= 0xfe;
+}
+#endif
+
+/* ---------- reset one of chip ---------- */
+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 paramater */
+  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;
+    }
+  }
+#if BUILD_Y8950
+  if (OPL->type & OPL_TYPE_ADPCM) {
+    YM_DELTAT *DELTAT = OPL->deltat;
+
+    DELTAT->freqbase = OPL->freqbase;
+    DELTAT->output_pointer = outd;
+    DELTAT->portshift = 5;
+    DELTAT->output_range = DELTAT_MIXING_LEVEL << TL_BITS;
+    YM_DELTAT_ADPCM_Reset (DELTAT, 0);
+  }
+#endif
+}
+
+/* ----------  Create one of vietual YM3812 ----------       */
+/* 'rate'  is sampling rate and 'bufsiz' is the size of the  */
+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 */
+  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 = 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;
+#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 */
+  OPL_initalize (OPL);
+  /* reset chip */
+  OPLResetChip (OPL);
+  return OPL;
+}
+
+/* ----------  Destroy one of vietual YM3812 ----------       */
+void
+OPLDestroy (FM_OPL * OPL)
+{
+  void *t = OPL;
+
+  OPL_UnLockTable ();
+  free (t);
+}
+
+/* ----------  Option handlers ----------       */
+
+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)
+{
+  OPL->IRQHandler = IRQHandler;
+  OPL->IRQParam = param;
+}
+
+void
+OPLSetUpdateHandler (FM_OPL * OPL, OPL_UPDATEHANDLER UpdateHandler, int param)
+{
+  OPL->UpdateHandler = UpdateHandler;
+  OPL->UpdateParam = param;
+}
+
+#if BUILD_Y8950
+void
+OPLSetPortHandler (FM_OPL * OPL, OPL_PORTHANDLER_W PortHandler_w,
+    OPL_PORTHANDLER_R PortHandler_r, int param)
+{
+  OPL->porthandler_w = PortHandler_w;
+  OPL->porthandler_r = PortHandler_r;
+  OPL->port_param = param;
+}
+
+void
+OPLSetKeyboardHandler (FM_OPL * OPL, OPL_PORTHANDLER_W KeyboardHandler_w,
+    OPL_PORTHANDLER_R KeyboardHandler_r, int param)
+{
+  OPL->keyboardhandler_w = KeyboardHandler_w;
+  OPL->keyboardhandler_r = KeyboardHandler_r;
+  OPL->keyboard_param = param;
+}
+#endif
+/* ---------- 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 */
+    if (OPL->UpdateHandler)
+      OPL->UpdateHandler (OPL->UpdateParam, 0);
+    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 */
+      if (OPL->type & OPL_TYPE_KEYBOARD) {
+        if (OPL->keyboardhandler_r)
+          return OPL->keyboardhandler_r (OPL->keyboard_param);
+        else
+          LOG (LOG_WAR, ("OPL:read unmapped KEYBOARD port\n"));
+      }
+      return 0;
+#if 0
+    case 0x0f:                 /* ADPCM-DATA  */
+      return 0;
+#endif
+    case 0x19:                 /* I/O DATA    */
+      if (OPL->type & OPL_TYPE_IO) {
+        if (OPL->porthandler_r)
+          return OPL->porthandler_r (OPL->port_param);
+        else
+          LOG (LOG_WAR, ("OPL:read unmapped I/O port\n"));
+      }
+      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 controll */
+    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]);
+    }
+  }
+  /* reload timer */
+  if (OPL->TimerHandler)
+    (OPL->TimerHandler) (OPL->TimerParam + c,
+        (double) OPL->T[c] * OPL->TimerBase);
+  return OPL->status >> 7;
+}