2743 lines
69 KiB
C
2743 lines
69 KiB
C
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/*
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**
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** File: fmopl.c - software implementation of FM sound generator
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** types OPL and OPL2
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**
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** Copyright Jarek Burczynski (bujar at mame dot net)
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** Copyright Tatsuyuki Satoh , MultiArcadeMachineEmulator development
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**
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** Version 0.72
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**
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Revision History:
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04-08-2003 Jarek Burczynski:
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- removed BFRDY hack. BFRDY is busy flag, and it should be 0 only when the chip
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handles memory read/write or during the adpcm synthesis when the chip
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requests another byte of ADPCM data.
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24-07-2003 Jarek Burczynski:
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- added a small hack for Y8950 status BFRDY flag (bit 3 should be set after
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some (unknown) delay). Right now it's always set.
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14-06-2003 Jarek Burczynski:
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- implemented all of the status register flags in Y8950 emulation
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- renamed y8950_set_delta_t_memory() parameters from _rom_ to _mem_ since
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they can be either RAM or ROM
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08-10-2002 Jarek Burczynski (thanks to Dox for the YM3526 chip)
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- corrected ym3526_read() to always set bit 2 and bit 1
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to HIGH state - identical to ym3812_read (verified on real YM3526)
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04-28-2002 Jarek Burczynski:
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- binary exact Envelope Generator (verified on real YM3812);
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compared to YM2151: the EG clock is equal to internal_clock,
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rates are 2 times slower and volume resolution is one bit less
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- modified interface functions (they no longer return pointer -
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that's internal to the emulator now):
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- new wrapper functions for OPLCreate: ym3526_init(), ym3812_init() and y8950_init()
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- corrected 'off by one' error in feedback calculations (when feedback is off)
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- enabled waveform usage (credit goes to Vlad Romascanu and zazzal22)
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- speeded up noise generator calculations (Nicola Salmoria)
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03-24-2002 Jarek Burczynski (thanks to Dox for the YM3812 chip)
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Complete rewrite (all verified on real YM3812):
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- corrected sin_tab and tl_tab data
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- corrected operator output calculations
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- corrected waveform_select_enable register;
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simply: ignore all writes to waveform_select register when
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waveform_select_enable == 0 and do not change the waveform previously selected.
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- corrected KSR handling
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- corrected Envelope Generator: attack shape, Sustain mode and
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Percussive/Non-percussive modes handling
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- Envelope Generator rates are two times slower now
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- LFO amplitude (tremolo) and phase modulation (vibrato)
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- rhythm sounds phase generation
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- white noise generator (big thanks to Olivier Galibert for mentioning Berlekamp-Massey algorithm)
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- corrected key on/off handling (the 'key' signal is ORed from three sources: FM, rhythm and CSM)
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- funky details (like ignoring output of operator 1 in BD rhythm sound when connect == 1)
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12-28-2001 Acho A. Tang
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- reflected Delta-T EOS status on Y8950 status port.
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- fixed subscription range of attack/decay tables
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To do:
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add delay before key off in CSM mode (see CSMKeyControll)
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verify volume of the FM part on the Y8950
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*/
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#include <math.h>
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#include "mamedef.h"
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#ifdef _DEBUG
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#include <stdio.h>
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#endif
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#include <stdlib.h>
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#include <memory.h>
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//#include "sndintrf.h"
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#include "fmopl.h"
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#if BUILD_Y8950
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#include "ymdeltat.h"
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#endif
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#define NULL ((void *)0)
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/* output final shift */
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#if (OPL_SAMPLE_BITS==16)
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#define FINAL_SH (0)
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#define MAXOUT (+32767)
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#define MINOUT (-32768)
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#else
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#define FINAL_SH (8)
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#define MAXOUT (+127)
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#define MINOUT (-128)
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#endif
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#define FREQ_SH 16 /* 16.16 fixed point (frequency calculations) */
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#define EG_SH 16 /* 16.16 fixed point (EG timing) */
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#define LFO_SH 24 /* 8.24 fixed point (LFO calculations) */
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#define TIMER_SH 16 /* 16.16 fixed point (timers calculations) */
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#define FREQ_MASK ((1<<FREQ_SH)-1)
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/* envelope output entries */
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#define ENV_BITS 10
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#define ENV_LEN (1<<ENV_BITS)
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#define ENV_STEP (128.0/ENV_LEN)
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#define MAX_ATT_INDEX ((1<<(ENV_BITS-1))-1) /*511*/
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#define MIN_ATT_INDEX (0)
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/* sinwave entries */
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#define SIN_BITS 10
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#define SIN_LEN (1<<SIN_BITS)
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#define SIN_MASK (SIN_LEN-1)
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#define TL_RES_LEN (256) /* 8 bits addressing (real chip) */
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/* register number to channel number , slot offset */
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#define SLOT1 0
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#define SLOT2 1
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/* Envelope Generator phases */
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#define EG_ATT 4
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#define EG_DEC 3
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#define EG_SUS 2
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#define EG_REL 1
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#define EG_OFF 0
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/* save output as raw 16-bit sample */
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/*#define SAVE_SAMPLE*/
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#ifdef SAVE_SAMPLE
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INLINE signed int acc_calc(signed int value)
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{
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if (value>=0)
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{
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if (value < 0x0200)
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return (value & ~0);
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if (value < 0x0400)
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return (value & ~1);
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if (value < 0x0800)
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return (value & ~3);
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if (value < 0x1000)
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return (value & ~7);
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if (value < 0x2000)
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return (value & ~15);
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if (value < 0x4000)
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return (value & ~31);
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return (value & ~63);
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}
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/*else value < 0*/
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if (value > -0x0200)
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return (~abs(value) & ~0);
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if (value > -0x0400)
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return (~abs(value) & ~1);
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if (value > -0x0800)
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return (~abs(value) & ~3);
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if (value > -0x1000)
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return (~abs(value) & ~7);
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if (value > -0x2000)
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return (~abs(value) & ~15);
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if (value > -0x4000)
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return (~abs(value) & ~31);
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return (~abs(value) & ~63);
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}
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static FILE *sample[1];
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#if 1 /*save to MONO file */
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#define SAVE_ALL_CHANNELS \
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{ signed int pom = acc_calc(lt); \
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fputc((unsigned short)pom&0xff,sample[0]); \
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fputc(((unsigned short)pom>>8)&0xff,sample[0]); \
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}
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#else /*save to STEREO file */
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#define SAVE_ALL_CHANNELS \
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{ signed int pom = lt; \
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fputc((unsigned short)pom&0xff,sample[0]); \
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fputc(((unsigned short)pom>>8)&0xff,sample[0]); \
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pom = rt; \
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fputc((unsigned short)pom&0xff,sample[0]); \
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fputc(((unsigned short)pom>>8)&0xff,sample[0]); \
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}
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#endif
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#endif
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//#define LOG_CYM_FILE 0
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//static FILE * cymfile = NULL;
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#define OPL_TYPE_WAVESEL 0x01 /* waveform select */
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#define OPL_TYPE_ADPCM 0x02 /* DELTA-T ADPCM unit */
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#define OPL_TYPE_KEYBOARD 0x04 /* keyboard interface */
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#define OPL_TYPE_IO 0x08 /* I/O port */
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/* ---------- Generic interface section ---------- */
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#define OPL_TYPE_YM3526 (0)
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#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL)
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#define OPL_TYPE_Y8950 (OPL_TYPE_ADPCM|OPL_TYPE_KEYBOARD|OPL_TYPE_IO)
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typedef struct
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{
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UINT32 ar; /* attack rate: AR<<2 */
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UINT32 dr; /* decay rate: DR<<2 */
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UINT32 rr; /* release rate:RR<<2 */
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UINT8 KSR; /* key scale rate */
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UINT8 ksl; /* keyscale level */
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UINT8 ksr; /* key scale rate: kcode>>KSR */
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UINT8 mul; /* multiple: mul_tab[ML] */
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/* Phase Generator */
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UINT32 Cnt; /* frequency counter */
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UINT32 Incr; /* frequency counter step */
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UINT8 FB; /* feedback shift value */
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INT32 *connect1; /* slot1 output pointer */
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INT32 op1_out[2]; /* slot1 output for feedback */
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UINT8 CON; /* connection (algorithm) type */
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/* Envelope Generator */
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UINT8 eg_type; /* percussive/non-percussive mode */
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UINT8 state; /* phase type */
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UINT32 TL; /* total level: TL << 2 */
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INT32 TLL; /* adjusted now TL */
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INT32 volume; /* envelope counter */
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UINT32 sl; /* sustain level: sl_tab[SL] */
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UINT8 eg_sh_ar; /* (attack state) */
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UINT8 eg_sel_ar; /* (attack state) */
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UINT8 eg_sh_dr; /* (decay state) */
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UINT8 eg_sel_dr; /* (decay state) */
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UINT8 eg_sh_rr; /* (release state) */
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UINT8 eg_sel_rr; /* (release state) */
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UINT32 key; /* 0 = KEY OFF, >0 = KEY ON */
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/* LFO */
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UINT32 AMmask; /* LFO Amplitude Modulation enable mask */
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UINT8 vib; /* LFO Phase Modulation enable flag (active high)*/
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/* waveform select */
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UINT16 wavetable;
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} OPL_SLOT;
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typedef struct
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{
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OPL_SLOT SLOT[2];
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/* phase generator state */
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UINT32 block_fnum; /* block+fnum */
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UINT32 fc; /* Freq. Increment base */
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UINT32 ksl_base; /* KeyScaleLevel Base step */
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UINT8 kcode; /* key code (for key scaling) */
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UINT8 Muted;
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} OPL_CH;
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/* OPL state */
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typedef struct fm_opl_f
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{
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/* FM channel slots */
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OPL_CH P_CH[9]; /* OPL/OPL2 chips have 9 channels*/
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UINT8 MuteSpc[6]; /* Mute Special: 5 Rhythm + 1 DELTA-T Channel */
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UINT32 eg_cnt; /* global envelope generator counter */
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UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/72 */
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UINT32 eg_timer_add; /* step of eg_timer */
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UINT32 eg_timer_overflow; /* envelope generator timer overlfows every 1 sample (on real chip) */
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UINT8 rhythm; /* Rhythm mode */
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UINT32 fn_tab[1024]; /* fnumber->increment counter */
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/* LFO */
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UINT32 LFO_AM;
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INT32 LFO_PM;
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UINT8 lfo_am_depth;
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UINT8 lfo_pm_depth_range;
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UINT32 lfo_am_cnt;
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UINT32 lfo_am_inc;
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UINT32 lfo_pm_cnt;
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UINT32 lfo_pm_inc;
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UINT32 noise_rng; /* 23 bit noise shift register */
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UINT32 noise_p; /* current noise 'phase' */
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UINT32 noise_f; /* current noise period */
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UINT8 wavesel; /* waveform select enable flag */
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UINT32 T[2]; /* timer counters */
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UINT8 st[2]; /* timer enable */
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#if BUILD_Y8950
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/* Delta-T ADPCM unit (Y8950) */
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YM_DELTAT *deltat;
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/* Keyboard and I/O ports interface */
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UINT8 portDirection;
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UINT8 portLatch;
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OPL_PORTHANDLER_R porthandler_r;
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OPL_PORTHANDLER_W porthandler_w;
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void * port_param;
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OPL_PORTHANDLER_R keyboardhandler_r;
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OPL_PORTHANDLER_W keyboardhandler_w;
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void * keyboard_param;
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#endif
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/* external event callback handlers */
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OPL_TIMERHANDLER timer_handler; /* TIMER handler */
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void *TimerParam; /* TIMER parameter */
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OPL_IRQHANDLER IRQHandler; /* IRQ handler */
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void *IRQParam; /* IRQ parameter */
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OPL_UPDATEHANDLER UpdateHandler;/* stream update handler */
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void *UpdateParam; /* stream update parameter */
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UINT8 type; /* chip type */
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UINT8 address; /* address register */
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UINT8 status; /* status flag */
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UINT8 statusmask; /* status mask */
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UINT8 mode; /* Reg.08 : CSM,notesel,etc. */
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UINT32 clock; /* master clock (Hz) */
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UINT32 rate; /* sampling rate (Hz) */
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double freqbase; /* frequency base */
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//attotime TimerBase; /* Timer base time (==sampling time)*/
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signed int phase_modulation; /* phase modulation input (SLOT 2) */
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signed int output[1];
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#if BUILD_Y8950
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INT32 output_deltat[4]; /* for Y8950 DELTA-T, chip is mono, that 4 here is just for safety */
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#endif
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} FM_OPL;
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/* mapping of register number (offset) to slot number used by the emulator */
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static const int slot_array[32]=
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{
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0, 2, 4, 1, 3, 5,-1,-1,
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6, 8,10, 7, 9,11,-1,-1,
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12,14,16,13,15,17,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1
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};
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/* key scale level */
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/* table is 3dB/octave , DV converts this into 6dB/octave */
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/* 0.1875 is bit 0 weight of the envelope counter (volume) expressed in the 'decibel' scale */
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#define DV (0.1875/2.0)
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static const UINT32 ksl_tab[8*16]=
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{
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/* OCT 0 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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/* OCT 1 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV,
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1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
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/* OCT 2 */
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0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
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0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
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3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
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4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
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/* OCT 3 */
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0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
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3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
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6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
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7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
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/* OCT 4 */
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0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
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6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
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9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
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10.875/DV,11.250/DV,11.625/DV,12.000/DV,
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/* OCT 5 */
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0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
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9.000/DV,10.125/DV,10.875/DV,11.625/DV,
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12.000/DV,12.750/DV,13.125/DV,13.500/DV,
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13.875/DV,14.250/DV,14.625/DV,15.000/DV,
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/* OCT 6 */
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0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
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12.000/DV,13.125/DV,13.875/DV,14.625/DV,
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15.000/DV,15.750/DV,16.125/DV,16.500/DV,
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16.875/DV,17.250/DV,17.625/DV,18.000/DV,
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/* OCT 7 */
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0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
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15.000/DV,16.125/DV,16.875/DV,17.625/DV,
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||
|
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
|
||
|
|
||
|
/* 0 / 3.0 / 1.5 / 6.0 dB/OCT */
|
||
|
static const UINT32 ksl_shift[4] = { 31, 1, 2, 0 };
|
||
|
|
||
|
|
||
|
/* 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
|
||
|
|
||
|
|
||
|
#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 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 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),
|
||
|
|
||
|
/* 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
|
||
|
|
||
|
|
||
|
/* multiple table */
|
||
|
#define ML 2
|
||
|
static const UINT8 mul_tab[16]= {
|
||
|
/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,10,12,12,15,15 */
|
||
|
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
|
||
|
|
||
|
/* 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 (losing 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*/
|
||
|
};
|
||
|
|
||
|
|
||
|
/* lock level of common table */
|
||
|
static int num_lock = 0;
|
||
|
|
||
|
|
||
|
#define SLOT7_1 (&OPL->P_CH[7].SLOT[SLOT1])
|
||
|
#define SLOT7_2 (&OPL->P_CH[7].SLOT[SLOT2])
|
||
|
#define SLOT8_1 (&OPL->P_CH[8].SLOT[SLOT1])
|
||
|
#define SLOT8_2 (&OPL->P_CH[8].SLOT[SLOT2])
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
/*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);
|
||
|
}
|
||
|
|
||
|
|
||
|
/* 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)
|
||
|
OPL->LFO_AM = tmp;
|
||
|
else
|
||
|
OPL->LFO_AM = tmp>>2;
|
||
|
|
||
|
OPL->lfo_pm_cnt += OPL->lfo_pm_inc;
|
||
|
OPL->LFO_PM = ((OPL->lfo_pm_cnt>>LFO_SH) & 7) | OPL->lfo_pm_depth_range;
|
||
|
}
|
||
|
|
||
|
INLINE void refresh_eg(FM_OPL* OPL)
|
||
|
{
|
||
|
OPL_CH *CH;
|
||
|
OPL_SLOT *op;
|
||
|
int i;
|
||
|
int new_vol;
|
||
|
|
||
|
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) ) )
|
||
|
{
|
||
|
new_vol = op->volume + ((~op->volume *
|
||
|
(eg_inc[op->eg_sel_ar + ((OPL->eg_cnt>>op->eg_sh_ar)&7)])
|
||
|
) >> 3);
|
||
|
if (new_vol <= MIN_ATT_INDEX)
|
||
|
{
|
||
|
op->volume = MIN_ATT_INDEX;
|
||
|
op->state = EG_DEC;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
/*case EG_DEC: // decay phase
|
||
|
if ( !(OPL->eg_cnt & ((1<<op->eg_sh_dr)-1) ) )
|
||
|
{
|
||
|
new_vol = op->volume + eg_inc[op->eg_sel_dr + ((OPL->eg_cnt>>op->eg_sh_dr)&7)];
|
||
|
|
||
|
if ( new_vol >= op->sl )
|
||
|
op->state = EG_SUS;
|
||
|
}
|
||
|
break;
|
||
|
case EG_SUS: // sustain phase
|
||
|
if ( !op->eg_type) percussive mode
|
||
|
{
|
||
|
new_vol = op->volume + eg_inc[op->eg_sel_rr + ((OPL->eg_cnt>>op->eg_sh_rr)&7)];
|
||
|
|
||
|
if ( !(OPL->eg_cnt & ((1<<op->eg_sh_rr)-1) ) )
|
||
|
{
|
||
|
if ( new_vol >= MAX_ATT_INDEX )
|
||
|
op->volume = MAX_ATT_INDEX;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
case EG_REL: // release phase
|
||
|
if ( !(OPL->eg_cnt & ((1<<op->eg_sh_rr)-1) ) )
|
||
|
{
|
||
|
new_vol = op->volume + eg_inc[op->eg_sel_rr + ((OPL->eg_cnt>>op->eg_sh_rr)&7)];
|
||
|
if ( new_vol >= MAX_ATT_INDEX )
|
||
|
{
|
||
|
op->volume = MAX_ATT_INDEX;
|
||
|
op->state = EG_OFF;
|
||
|
}
|
||
|
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
break;*/
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/* advance to next sample */
|
||
|
INLINE void advance(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 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 >= 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;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for (i=0; i<9*2; i++)
|
||
|
{
|
||
|
CH = &OPL->P_CH[i/2];
|
||
|
op = &CH->SLOT[i&1];
|
||
|
|
||
|
/* Phase Generator */
|
||
|
if(op->vib)
|
||
|
{
|
||
|
UINT8 block;
|
||
|
unsigned int block_fnum = CH->block_fnum;
|
||
|
|
||
|
unsigned int fnum_lfo = (block_fnum&0x0380) >> 7;
|
||
|
|
||
|
signed int lfo_fn_table_index_offset = lfo_pm_table[OPL->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;
|
||
|
}
|
||
|
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)
|
||
|
{
|
||
|
/*
|
||
|
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--;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
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];
|
||
|
}
|
||
|
|
||
|
INLINE signed int op_calc1(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 )) >> FREQ_SH ) & SIN_MASK) ];
|
||
|
|
||
|
if (p >= TL_TAB_LEN)
|
||
|
return 0;
|
||
|
return tl_tab[p];
|
||
|
}
|
||
|
|
||
|
|
||
|
#define volume_calc(OP) ((OP)->TLL + ((UINT32)(OP)->volume) + (OPL->LFO_AM & (OP)->AMmask))
|
||
|
|
||
|
/* calculate output */
|
||
|
INLINE void OPL_CALC_CH( FM_OPL *OPL, OPL_CH *CH )
|
||
|
{
|
||
|
OPL_SLOT *SLOT;
|
||
|
unsigned int env;
|
||
|
signed int out;
|
||
|
|
||
|
if (CH->Muted)
|
||
|
return;
|
||
|
|
||
|
OPL->phase_modulation = 0;
|
||
|
|
||
|
/* SLOT 1 */
|
||
|
SLOT = &CH->SLOT[SLOT1];
|
||
|
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++;
|
||
|
env = volume_calc(SLOT);
|
||
|
if( env < ENV_QUIET )
|
||
|
OPL->output[0] += op_calc(SLOT->Cnt, env, OPL->phase_modulation, SLOT->wavetable);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
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( FM_OPL *OPL, OPL_CH *CH, unsigned int noise )
|
||
|
{
|
||
|
OPL_SLOT *SLOT;
|
||
|
signed int out;
|
||
|
unsigned int env;
|
||
|
|
||
|
|
||
|
/* 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
|
||
|
*/
|
||
|
|
||
|
OPL->phase_modulation = 0;
|
||
|
/* SLOT 1 */
|
||
|
SLOT = &CH[6].SLOT[SLOT1];
|
||
|
env = volume_calc(SLOT);
|
||
|
|
||
|
out = SLOT->op1_out[0] + SLOT->op1_out[1];
|
||
|
SLOT->op1_out[0] = SLOT->op1_out[1];
|
||
|
|
||
|
if (!SLOT->CON)
|
||
|
OPL->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++;
|
||
|
env = volume_calc(SLOT);
|
||
|
if( env < ENV_QUIET && ! OPL->MuteSpc[0] )
|
||
|
OPL->output[0] += op_calc(SLOT->Cnt, env, OPL->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 && ! OPL->MuteSpc[4] )
|
||
|
{
|
||
|
|
||
|
/* 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
|
||
|
/* 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;
|
||
|
}
|
||
|
|
||
|
OPL->output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_1->wavetable) * 2;
|
||
|
}
|
||
|
|
||
|
/* Snare Drum (verified on real YM3812) */
|
||
|
env = volume_calc(SLOT7_2);
|
||
|
if( env < ENV_QUIET && ! OPL->MuteSpc[1] )
|
||
|
{
|
||
|
/* 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;
|
||
|
|
||
|
OPL->output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_2->wavetable) * 2;
|
||
|
}
|
||
|
|
||
|
/* Tom Tom (verified on real YM3812) */
|
||
|
env = volume_calc(SLOT8_1);
|
||
|
if( env < ENV_QUIET && ! OPL->MuteSpc[2] )
|
||
|
OPL->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 && ! OPL->MuteSpc[3] )
|
||
|
{
|
||
|
/* 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;
|
||
|
|
||
|
OPL->output[0] += op_calc(phase<<FREQ_SH, env, 0, SLOT8_2->wavetable) * 2;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/* 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
|
||
|
}
|
||
|
/*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) * M_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(2.0); /* convert to 'decibels' */
|
||
|
else
|
||
|
o = 8*log(-1.0/m)/log(2.0); /* 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]] );*/
|
||
|
}
|
||
|
|
||
|
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]] );*/
|
||
|
}
|
||
|
/*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 */
|
||
|
OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / 72.0) / OPL->rate : 0;
|
||
|
#if 0
|
||
|
OPL->rate = (double)OPL->clock / 72.0;
|
||
|
OPL->freqbase = 1.0;
|
||
|
#endif
|
||
|
|
||
|
/*logerror("freqbase=%f\n", OPL->freqbase);*/
|
||
|
|
||
|
/* Timer base time */
|
||
|
//OPL->TimerBase = attotime_mul(ATTOTIME_IN_HZ(OPL->clock), 72);
|
||
|
|
||
|
/* 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
|
||
|
}
|
||
|
|
||
|
#if 0
|
||
|
for( i=0 ; i < 16 ; i++ )
|
||
|
{
|
||
|
logerror("FMOPL.C: sl_tab[%i] = %08x\n",
|
||
|
i, sl_tab[i] );
|
||
|
}
|
||
|
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
|
||
|
|
||
|
for(i = 0; i < 9; i ++)
|
||
|
OPL->P_CH[i].Muted = 0x00;
|
||
|
for(i = 0; i < 6; i ++)
|
||
|
OPL->MuteSpc[i] = 0x00;
|
||
|
|
||
|
|
||
|
/* 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 = (1.0 / 64.0 ) * (1<<LFO_SH) * OPL->freqbase;
|
||
|
|
||
|
/* Vibrato: 8 output levels (triangle waveform); 1 level takes 1024 samples */
|
||
|
OPL->lfo_pm_inc = (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);*/
|
||
|
|
||
|
/* Noise generator: a step takes 1 sample */
|
||
|
OPL->noise_f = (1.0 / 1.0) * (1<<FREQ_SH) * OPL->freqbase;
|
||
|
|
||
|
OPL->eg_timer_add = (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;
|
||
|
}
|
||
|
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;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* 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 ];
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* 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];
|
||
|
|
||
|
SLOT->ksl = ksl_shift[v >> 6];
|
||
|
SLOT->TL = (v&0x3f)<<(ENV_BITS-1-7); /* 7 bits TL (bit 6 = always 0) */
|
||
|
|
||
|
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];
|
||
|
|
||
|
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 ];
|
||
|
}
|
||
|
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 ];
|
||
|
}
|
||
|
|
||
|
/* 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;
|
||
|
int block_fnum;
|
||
|
|
||
|
|
||
|
/* adjust bus to 8 bits */
|
||
|
r &= 0xff;
|
||
|
v &= 0xff;
|
||
|
|
||
|
/*if (LOG_CYM_FILE && (cymfile) && (r!=0) )
|
||
|
{
|
||
|
fputc( (unsigned char)r, cymfile );
|
||
|
fputc( (unsigned char)v, cymfile );
|
||
|
}*/
|
||
|
|
||
|
|
||
|
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 */
|
||
|
}
|
||
|
break;
|
||
|
case 0x02: /* Timer 1 */
|
||
|
OPL->T[0] = (256-v)*4;
|
||
|
break;
|
||
|
case 0x03: /* Timer 2 */
|
||
|
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-0x08); /* don't reset BFRDY flag or we will have to call deltat module to set the flag */
|
||
|
}
|
||
|
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 & (0x78-0x08) );
|
||
|
OPL_STATUSMASK_SET(OPL, (~v) & 0x78 );
|
||
|
|
||
|
/* timer 2 */
|
||
|
if(OPL->st[1] != st2)
|
||
|
{
|
||
|
//attotime period = st2 ? attotime_mul(OPL->TimerBase, OPL->T[1]) : attotime_zero;
|
||
|
OPL->st[1] = st2;
|
||
|
//if (OPL->timer_handler) (OPL->timer_handler)(OPL->TimerParam,1,period);
|
||
|
}
|
||
|
/* timer 1 */
|
||
|
if(OPL->st[0] != st1)
|
||
|
{
|
||
|
//attotime period = st1 ? attotime_mul(OPL->TimerBase, OPL->T[0]) : attotime_zero;
|
||
|
OPL->st[0] = st1;
|
||
|
//if (OPL->timer_handler) (OPL->timer_handler)(OPL->TimerParam,0,period);
|
||
|
}
|
||
|
}
|
||
|
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);
|
||
|
#ifdef _DEBUG
|
||
|
else
|
||
|
logerror("Y8950: write unmapped KEYBOARD port\n");
|
||
|
#endif
|
||
|
}
|
||
|
break;
|
||
|
case 0x07: /* DELTA-T control 1 : 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 control 2 : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */
|
||
|
OPL->mode = v;
|
||
|
#if BUILD_Y8950
|
||
|
if(OPL->type&OPL_TYPE_ADPCM)
|
||
|
YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v&0x0f); /* mask 4 LSBs in register 08 for DELTA-T unit */
|
||
|
#endif
|
||
|
break;
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
case 0x09: /* START ADD */
|
||
|
case 0x0a:
|
||
|
case 0x0b: /* STOP ADD */
|
||
|
case 0x0c:
|
||
|
case 0x0d: /* PRESCALE */
|
||
|
case 0x0e:
|
||
|
case 0x0f: /* ADPCM data write */
|
||
|
case 0x10: /* DELTA-N */
|
||
|
case 0x11: /* DELTA-N */
|
||
|
case 0x12: /* ADPCM volume */
|
||
|
if(OPL->type&OPL_TYPE_ADPCM)
|
||
|
YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
|
||
|
break;
|
||
|
|
||
|
case 0x15: /* DAC data high 8 bits (F7,F6...F2) */
|
||
|
case 0x16: /* DAC data low 2 bits (F1, F0 in bits 7,6) */
|
||
|
case 0x17: /* DAC data shift (S2,S1,S0 in bits 2,1,0) */
|
||
|
#ifdef _DEBUG
|
||
|
logerror("FMOPL.C: DAC data register written, but not implemented reg=%02x val=%02x\n",r,v);
|
||
|
#endif
|
||
|
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;
|
||
|
#endif
|
||
|
default:
|
||
|
#ifdef _DEBUG
|
||
|
logerror("FMOPL.C: write to unknown register: %02x\n",r);
|
||
|
#endif
|
||
|
break;
|
||
|
}
|
||
|
break;
|
||
|
case 0x20: /* am ON, vib ON, ksr, eg_type, mul */
|
||
|
slot = slot_array[r&0x1f];
|
||
|
if(slot < 0) return;
|
||
|
set_mul(OPL,slot,v);
|
||
|
break;
|
||
|
case 0x40:
|
||
|
slot = slot_array[r&0x1f];
|
||
|
if(slot < 0) return;
|
||
|
set_ksl_tl(OPL,slot,v);
|
||
|
break;
|
||
|
case 0x60:
|
||
|
slot = slot_array[r&0x1f];
|
||
|
if(slot < 0) return;
|
||
|
set_ar_dr(OPL,slot,v);
|
||
|
break;
|
||
|
case 0x80:
|
||
|
slot = slot_array[r&0x1f];
|
||
|
if(slot < 0) return;
|
||
|
set_sl_rr(OPL,slot,v);
|
||
|
break;
|
||
|
case 0xa0:
|
||
|
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)
|
||
|
{
|
||
|
/* BD key on/off */
|
||
|
if(v&0x10)
|
||
|
{
|
||
|
FM_KEYON (&OPL->P_CH[6].SLOT[SLOT1], 2);
|
||
|
FM_KEYON (&OPL->P_CH[6].SLOT[SLOT2], 2);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1],~2);
|
||
|
FM_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2],~2);
|
||
|
}
|
||
|
/* HH key on/off */
|
||
|
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;
|
||
|
}
|
||
|
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)
|
||
|
{
|
||
|
UINT8 block = block_fnum >> 10;
|
||
|
|
||
|
CH->block_fnum = block_fnum;
|
||
|
|
||
|
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]);
|
||
|
}
|
||
|
break;
|
||
|
case 0xc0:
|
||
|
/* FB,C */
|
||
|
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 ? &OPL->output[0] : &OPL->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)
|
||
|
{
|
||
|
slot = slot_array[r&0x1f];
|
||
|
if(slot < 0) return;
|
||
|
CH = &OPL->P_CH[slot/2];
|
||
|
|
||
|
CH->SLOT[slot&1].wavetable = (v&0x03)*SIN_LEN;
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*static TIMER_CALLBACK( cymfile_callback )
|
||
|
{
|
||
|
if (cymfile)
|
||
|
{
|
||
|
fputc( (unsigned char)0, cymfile );
|
||
|
}
|
||
|
}*/
|
||
|
|
||
|
/* lock/unlock for common table */
|
||
|
static int OPL_LockTable(void)
|
||
|
{
|
||
|
num_lock++;
|
||
|
if(num_lock>1) return 0;
|
||
|
|
||
|
/* first time */
|
||
|
|
||
|
/* allocate total level table (128kb space) */
|
||
|
if( !init_tables() )
|
||
|
{
|
||
|
num_lock--;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
/*if (LOG_CYM_FILE)
|
||
|
{
|
||
|
cymfile = fopen("3812_.cym","wb");
|
||
|
if (cymfile)
|
||
|
timer_pulse ( device->machine, ATTOTIME_IN_HZ(110), NULL, 0, cymfile_callback); //110 Hz pulse timer
|
||
|
else
|
||
|
logerror("Could not create file 3812_.cym\n");
|
||
|
}*/
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void OPL_UnLockTable(void)
|
||
|
{
|
||
|
if(num_lock) num_lock--;
|
||
|
if(num_lock) return;
|
||
|
|
||
|
/* last time */
|
||
|
|
||
|
OPLCloseTable();
|
||
|
|
||
|
/*if (cymfile)
|
||
|
fclose (cymfile);
|
||
|
cymfile = NULL;*/
|
||
|
}
|
||
|
|
||
|
static void OPLResetChip(FM_OPL *OPL)
|
||
|
{
|
||
|
int c,s;
|
||
|
int i;
|
||
|
|
||
|
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); /* 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];
|
||
|
for(s = 0 ; s < 2 ; s++ )
|
||
|
{
|
||
|
/* wave table */
|
||
|
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 = &OPL->output_deltat[0];
|
||
|
DELTAT->portshift = 5;
|
||
|
DELTAT->output_range = 1<<23;
|
||
|
YM_DELTAT_ADPCM_Reset(DELTAT,0,YM_DELTAT_EMULATION_MODE_NORMAL);
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
|
||
|
#if 0
|
||
|
//static STATE_POSTLOAD( OPL_postload )
|
||
|
static void OPL_postload(void* param)
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)param;
|
||
|
int slot, ch;
|
||
|
|
||
|
for( ch=0 ; ch < 9 ; ch++ )
|
||
|
{
|
||
|
OPL_CH *CH = &OPL->P_CH[ch];
|
||
|
|
||
|
/* Look up key scale level */
|
||
|
UINT32 block_fnum = CH->block_fnum;
|
||
|
CH->ksl_base = ksl_tab[block_fnum >> 6];
|
||
|
CH->fc = OPL->fn_tab[block_fnum & 0x03ff] >> (7 - (block_fnum >> 10));
|
||
|
|
||
|
for( slot=0 ; slot < 2 ; slot++ )
|
||
|
{
|
||
|
OPL_SLOT *SLOT = &CH->SLOT[slot];
|
||
|
|
||
|
/* Calculate key scale rate */
|
||
|
SLOT->ksr = CH->kcode >> SLOT->KSR;
|
||
|
|
||
|
/* Calculate attack, decay and release 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 ];
|
||
|
|
||
|
/* Calculate phase increment */
|
||
|
SLOT->Incr = CH->fc * SLOT->mul;
|
||
|
|
||
|
/* Total level */
|
||
|
SLOT->TLL = SLOT->TL + (CH->ksl_base >> SLOT->ksl);
|
||
|
|
||
|
/* Connect output */
|
||
|
SLOT->connect1 = SLOT->CON ? &OPL->output[0] : &OPL->phase_modulation;
|
||
|
}
|
||
|
}
|
||
|
#if BUILD_Y8950
|
||
|
if ( (OPL->type & OPL_TYPE_ADPCM) && (OPL->deltat) )
|
||
|
{
|
||
|
// We really should call the postlod function for the YM_DELTAT, but it's hard without registers
|
||
|
// (see the way the YM2610 does it)
|
||
|
//YM_DELTAT_postload(OPL->deltat, REGS);
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
|
||
|
static void OPLsave_state_channel(OPL_CH *CH)
|
||
|
{
|
||
|
int slot, ch;
|
||
|
|
||
|
for( ch=0 ; ch < 9 ; ch++, CH++ )
|
||
|
{
|
||
|
// channel
|
||
|
state_save_register_device_item(device, ch, CH->block_fnum);
|
||
|
state_save_register_device_item(device, ch, CH->kcode);
|
||
|
// slots
|
||
|
for( slot=0 ; slot < 2 ; slot++ )
|
||
|
{
|
||
|
OPL_SLOT *SLOT = &CH->SLOT[slot];
|
||
|
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->ar);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->dr);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->rr);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->KSR);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->ksl);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->mul);
|
||
|
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->Cnt);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->FB);
|
||
|
state_save_register_device_item_array(device, ch * 2 + slot, SLOT->op1_out);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->CON);
|
||
|
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->eg_type);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->state);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->TL);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->volume);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->sl);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->key);
|
||
|
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->AMmask);
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->vib);
|
||
|
|
||
|
state_save_register_device_item(device, ch * 2 + slot, SLOT->wavetable);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
|
||
|
/* Register savestate for a virtual YM3812/YM3526/Y8950 */
|
||
|
|
||
|
/*static void OPL_save_state(FM_OPL *OPL)
|
||
|
{
|
||
|
OPLsave_state_channel(device, OPL->P_CH);
|
||
|
|
||
|
state_save_register_device_item(device, 0, OPL->eg_cnt);
|
||
|
state_save_register_device_item(device, 0, OPL->eg_timer);
|
||
|
|
||
|
state_save_register_device_item(device, 0, OPL->rhythm);
|
||
|
|
||
|
state_save_register_device_item(device, 0, OPL->lfo_am_depth);
|
||
|
state_save_register_device_item(device, 0, OPL->lfo_pm_depth_range);
|
||
|
state_save_register_device_item(device, 0, OPL->lfo_am_cnt);
|
||
|
state_save_register_device_item(device, 0, OPL->lfo_pm_cnt);
|
||
|
|
||
|
state_save_register_device_item(device, 0, OPL->noise_rng);
|
||
|
state_save_register_device_item(device, 0, OPL->noise_p);
|
||
|
|
||
|
if( OPL->type & OPL_TYPE_WAVESEL )
|
||
|
{
|
||
|
state_save_register_device_item(device, 0, OPL->wavesel);
|
||
|
}
|
||
|
|
||
|
state_save_register_device_item_array(device, 0, OPL->T);
|
||
|
state_save_register_device_item_array(device, 0, OPL->st);
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
if ( (OPL->type & OPL_TYPE_ADPCM) && (OPL->deltat) )
|
||
|
{
|
||
|
YM_DELTAT_savestate(device, OPL->deltat);
|
||
|
}
|
||
|
|
||
|
if ( OPL->type & OPL_TYPE_IO )
|
||
|
{
|
||
|
state_save_register_device_item(device, 0, OPL->portDirection);
|
||
|
state_save_register_device_item(device, 0, OPL->portLatch);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
state_save_register_device_item(device, 0, OPL->address);
|
||
|
state_save_register_device_item(device, 0, OPL->status);
|
||
|
state_save_register_device_item(device, 0, OPL->statusmask);
|
||
|
state_save_register_device_item(device, 0, OPL->mode);
|
||
|
|
||
|
state_save_register_postload(device->machine, OPL_postload, OPL);
|
||
|
}*/
|
||
|
|
||
|
|
||
|
/* Create one of virtual YM3812/YM3526/Y8950 */
|
||
|
/* 'clock' is chip clock in Hz */
|
||
|
/* 'rate' is sampling rate */
|
||
|
static FM_OPL *OPLCreate(UINT32 clock, UINT32 rate, int type)
|
||
|
{
|
||
|
char *ptr;
|
||
|
FM_OPL *OPL;
|
||
|
int state_size;
|
||
|
|
||
|
if (OPL_LockTable() == -1) return NULL;
|
||
|
|
||
|
/* calculate OPL state size */
|
||
|
state_size = sizeof(FM_OPL);
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
if (type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT);
|
||
|
#endif
|
||
|
|
||
|
/* allocate memory block */
|
||
|
ptr = (char *)malloc(state_size);
|
||
|
|
||
|
if (ptr==NULL)
|
||
|
return NULL;
|
||
|
|
||
|
/* clear */
|
||
|
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
|
||
|
|
||
|
OPL->type = type;
|
||
|
OPL->clock = clock;
|
||
|
OPL->rate = rate;
|
||
|
|
||
|
/* init global tables */
|
||
|
OPL_initalize(OPL);
|
||
|
|
||
|
return OPL;
|
||
|
}
|
||
|
|
||
|
/* Destroy one of virtual YM3812 */
|
||
|
static void OPLDestroy(FM_OPL *OPL)
|
||
|
{
|
||
|
OPL_UnLockTable();
|
||
|
free(OPL);
|
||
|
}
|
||
|
|
||
|
/* Optional handlers */
|
||
|
|
||
|
static void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER timer_handler,void *param)
|
||
|
{
|
||
|
OPL->timer_handler = timer_handler;
|
||
|
OPL->TimerParam = param;
|
||
|
}
|
||
|
static void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,void *param)
|
||
|
{
|
||
|
OPL->IRQHandler = IRQHandler;
|
||
|
OPL->IRQParam = param;
|
||
|
}
|
||
|
static void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,void *param)
|
||
|
{
|
||
|
OPL->UpdateHandler = UpdateHandler;
|
||
|
OPL->UpdateParam = param;
|
||
|
}
|
||
|
|
||
|
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);
|
||
|
}
|
||
|
return OPL->status>>7;
|
||
|
}
|
||
|
|
||
|
static unsigned char OPLRead(FM_OPL *OPL,int a)
|
||
|
{
|
||
|
if( !(a&1) )
|
||
|
{
|
||
|
/* status port */
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
|
||
|
if(OPL->type&OPL_TYPE_ADPCM) /* Y8950 */
|
||
|
{
|
||
|
return (OPL->status & (OPL->statusmask|0x80)) | (OPL->deltat->PCM_BSY&1);
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
|
||
|
/* OPL and OPL2 */
|
||
|
return OPL->status & (OPL->statusmask|0x80);
|
||
|
}
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
/* 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);
|
||
|
#ifdef _DEBUG
|
||
|
else
|
||
|
logerror("Y8950: read unmapped KEYBOARD port\n");
|
||
|
#endif
|
||
|
}
|
||
|
return 0;
|
||
|
|
||
|
case 0x0f: /* ADPCM-DATA */
|
||
|
if(OPL->type&OPL_TYPE_ADPCM)
|
||
|
{
|
||
|
UINT8 val;
|
||
|
|
||
|
val = YM_DELTAT_ADPCM_Read(OPL->deltat);
|
||
|
/*logerror("Y8950: read ADPCM value read=%02x\n",val);*/
|
||
|
return val;
|
||
|
}
|
||
|
return 0;
|
||
|
|
||
|
case 0x19: /* I/O DATA */
|
||
|
if(OPL->type&OPL_TYPE_IO)
|
||
|
{
|
||
|
if(OPL->porthandler_r)
|
||
|
return OPL->porthandler_r(OPL->port_param);
|
||
|
#ifdef _DEBUG
|
||
|
else
|
||
|
logerror("Y8950:read unmapped I/O port\n");
|
||
|
#endif
|
||
|
}
|
||
|
return 0;
|
||
|
case 0x1a: /* PCM-DATA */
|
||
|
if(OPL->type&OPL_TYPE_ADPCM)
|
||
|
{
|
||
|
#ifdef _DEBUG
|
||
|
logerror("Y8950 A/D convertion is accessed but not implemented !\n");
|
||
|
#endif
|
||
|
return 0x80; /* 2's complement PCM data - result from A/D convertion */
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
return 0xff;
|
||
|
}
|
||
|
|
||
|
/* 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);
|
||
|
/* 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->timer_handler) (OPL->timer_handler)(OPL->TimerParam,c,attotime_mul(OPL->TimerBase, OPL->T[c]));
|
||
|
return OPL->status>>7;
|
||
|
}
|
||
|
|
||
|
|
||
|
#define MAX_OPL_CHIPS 2
|
||
|
|
||
|
|
||
|
#if (BUILD_YM3812)
|
||
|
|
||
|
void * ym3812_init(UINT32 clock, UINT32 rate)
|
||
|
{
|
||
|
/* emulator create */
|
||
|
FM_OPL *YM3812 = OPLCreate(clock,rate,OPL_TYPE_YM3812);
|
||
|
if (YM3812)
|
||
|
{
|
||
|
//OPL_save_state(YM3812);
|
||
|
ym3812_reset_chip(YM3812);
|
||
|
}
|
||
|
return YM3812;
|
||
|
}
|
||
|
|
||
|
void ym3812_shutdown(void *chip)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
/* emulator shutdown */
|
||
|
OPLDestroy(YM3812);
|
||
|
}
|
||
|
void ym3812_reset_chip(void *chip)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
OPLResetChip(YM3812);
|
||
|
}
|
||
|
|
||
|
int ym3812_write(void *chip, int a, int v)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
return OPLWrite(YM3812, a, v);
|
||
|
}
|
||
|
|
||
|
unsigned char ym3812_read(void *chip, int a)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
/* YM3812 always returns bit2 and bit1 in HIGH state */
|
||
|
return OPLRead(YM3812, a) | 0x06 ;
|
||
|
}
|
||
|
int ym3812_timer_over(void *chip, int c)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
return OPLTimerOver(YM3812, c);
|
||
|
}
|
||
|
|
||
|
void ym3812_set_timer_handler(void *chip, OPL_TIMERHANDLER timer_handler, void *param)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
OPLSetTimerHandler(YM3812, timer_handler, param);
|
||
|
}
|
||
|
void ym3812_set_irq_handler(void *chip,OPL_IRQHANDLER IRQHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
OPLSetIRQHandler(YM3812, IRQHandler, param);
|
||
|
}
|
||
|
void ym3812_set_update_handler(void *chip,OPL_UPDATEHANDLER UpdateHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *YM3812 = (FM_OPL *)chip;
|
||
|
OPLSetUpdateHandler(YM3812, 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 ym3812_update_one(void *chip, OPLSAMPLE **buffer, int length)
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
UINT8 rhythm = OPL->rhythm&0x20;
|
||
|
OPLSAMPLE *bufL = buffer[0];
|
||
|
OPLSAMPLE *bufR = buffer[1];
|
||
|
int i;
|
||
|
|
||
|
if (! length)
|
||
|
{
|
||
|
refresh_eg(OPL);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
for( i=0; i < length ; i++ )
|
||
|
{
|
||
|
int lt;
|
||
|
|
||
|
OPL->output[0] = 0;
|
||
|
|
||
|
advance_lfo(OPL);
|
||
|
|
||
|
/* FM part */
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[0]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[1]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[2]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[3]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[4]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[5]);
|
||
|
|
||
|
if(!rhythm)
|
||
|
{
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[6]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[7]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[8]);
|
||
|
}
|
||
|
else /* Rhythm part */
|
||
|
{
|
||
|
OPL_CALC_RH(OPL, &OPL->P_CH[0], (OPL->noise_rng>>0)&1 );
|
||
|
}
|
||
|
|
||
|
lt = OPL->output[0];
|
||
|
|
||
|
lt >>= FINAL_SH;
|
||
|
|
||
|
/* limit check */
|
||
|
//lt = limit( lt , MAXOUT, MINOUT );
|
||
|
|
||
|
#ifdef SAVE_SAMPLE
|
||
|
if (which==0)
|
||
|
{
|
||
|
SAVE_ALL_CHANNELS
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* store to sound buffer */
|
||
|
bufL[i] = lt;
|
||
|
bufR[i] = lt;
|
||
|
|
||
|
advance(OPL);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
#endif /* BUILD_YM3812 */
|
||
|
|
||
|
|
||
|
|
||
|
#if (BUILD_YM3526)
|
||
|
|
||
|
void *ym3526_init(UINT32 clock, UINT32 rate)
|
||
|
{
|
||
|
/* emulator create */
|
||
|
FM_OPL *YM3526 = OPLCreate(clock,rate,OPL_TYPE_YM3526);
|
||
|
if (YM3526)
|
||
|
{
|
||
|
//OPL_save_state(YM3526);
|
||
|
ym3526_reset_chip(YM3526);
|
||
|
}
|
||
|
return YM3526;
|
||
|
}
|
||
|
|
||
|
void ym3526_shutdown(void *chip)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
/* emulator shutdown */
|
||
|
OPLDestroy(YM3526);
|
||
|
}
|
||
|
void ym3526_reset_chip(void *chip)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
OPLResetChip(YM3526);
|
||
|
}
|
||
|
|
||
|
int ym3526_write(void *chip, int a, int v)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
return OPLWrite(YM3526, a, v);
|
||
|
}
|
||
|
|
||
|
unsigned char ym3526_read(void *chip, int a)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
/* YM3526 always returns bit2 and bit1 in HIGH state */
|
||
|
return OPLRead(YM3526, a) | 0x06 ;
|
||
|
}
|
||
|
int ym3526_timer_over(void *chip, int c)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
return OPLTimerOver(YM3526, c);
|
||
|
}
|
||
|
|
||
|
void ym3526_set_timer_handler(void *chip, OPL_TIMERHANDLER timer_handler, void *param)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
OPLSetTimerHandler(YM3526, timer_handler, param);
|
||
|
}
|
||
|
void ym3526_set_irq_handler(void *chip,OPL_IRQHANDLER IRQHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
OPLSetIRQHandler(YM3526, IRQHandler, param);
|
||
|
}
|
||
|
void ym3526_set_update_handler(void *chip,OPL_UPDATEHANDLER UpdateHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *YM3526 = (FM_OPL *)chip;
|
||
|
OPLSetUpdateHandler(YM3526, 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 ym3526_update_one(void *chip, OPLSAMPLE **buffer, int length)
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
UINT8 rhythm = OPL->rhythm&0x20;
|
||
|
OPLSAMPLE *bufL = buffer[0];
|
||
|
OPLSAMPLE *bufR = buffer[1];
|
||
|
int i;
|
||
|
|
||
|
for( i=0; i < length ; i++ )
|
||
|
{
|
||
|
int lt;
|
||
|
|
||
|
OPL->output[0] = 0;
|
||
|
|
||
|
advance_lfo(OPL);
|
||
|
|
||
|
/* FM part */
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[0]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[1]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[2]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[3]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[4]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[5]);
|
||
|
|
||
|
if(!rhythm)
|
||
|
{
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[6]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[7]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[8]);
|
||
|
}
|
||
|
else /* Rhythm part */
|
||
|
{
|
||
|
OPL_CALC_RH(OPL, &OPL->P_CH[0], (OPL->noise_rng>>0)&1 );
|
||
|
}
|
||
|
|
||
|
lt = OPL->output[0];
|
||
|
|
||
|
lt >>= FINAL_SH;
|
||
|
|
||
|
/* limit check */
|
||
|
//lt = limit( lt , MAXOUT, MINOUT );
|
||
|
|
||
|
#ifdef SAVE_SAMPLE
|
||
|
if (which==0)
|
||
|
{
|
||
|
SAVE_ALL_CHANNELS
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* store to sound buffer */
|
||
|
bufL[i] = lt;
|
||
|
bufR[i] = lt;
|
||
|
|
||
|
advance(OPL);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
#endif /* BUILD_YM3526 */
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
#if BUILD_Y8950
|
||
|
|
||
|
static void Y8950_deltat_status_set(void *chip, UINT8 changebits)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPL_STATUS_SET(Y8950, changebits);
|
||
|
}
|
||
|
static void Y8950_deltat_status_reset(void *chip, UINT8 changebits)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPL_STATUS_RESET(Y8950, changebits);
|
||
|
}
|
||
|
|
||
|
void *y8950_init(UINT32 clock, UINT32 rate)
|
||
|
{
|
||
|
/* emulator create */
|
||
|
FM_OPL *Y8950 = OPLCreate(clock,rate,OPL_TYPE_Y8950);
|
||
|
if (Y8950)
|
||
|
{
|
||
|
Y8950->deltat->status_set_handler = Y8950_deltat_status_set;
|
||
|
Y8950->deltat->status_reset_handler = Y8950_deltat_status_reset;
|
||
|
Y8950->deltat->status_change_which_chip = Y8950;
|
||
|
Y8950->deltat->status_change_EOS_bit = 0x10; /* status flag: set bit4 on End Of Sample */
|
||
|
Y8950->deltat->status_change_BRDY_bit = 0x08; /* status flag: set bit3 on BRDY (End Of: ADPCM analysis/synthesis, memory reading/writing) */
|
||
|
|
||
|
/*Y8950->deltat->write_time = 10.0 / clock;*/ /* a single byte write takes 10 cycles of main clock */
|
||
|
/*Y8950->deltat->read_time = 8.0 / clock;*/ /* a single byte read takes 8 cycles of main clock */
|
||
|
/* reset */
|
||
|
//OPL_save_state(Y8950);
|
||
|
y8950_reset_chip(Y8950);
|
||
|
}
|
||
|
|
||
|
return Y8950;
|
||
|
}
|
||
|
|
||
|
void y8950_shutdown(void *chip)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
|
||
|
free(Y8950->deltat->memory); Y8950->deltat->memory = NULL;
|
||
|
|
||
|
/* emulator shutdown */
|
||
|
OPLDestroy(Y8950);
|
||
|
}
|
||
|
void y8950_reset_chip(void *chip)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPLResetChip(Y8950);
|
||
|
}
|
||
|
|
||
|
int y8950_write(void *chip, int a, int v)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
return OPLWrite(Y8950, a, v);
|
||
|
}
|
||
|
|
||
|
unsigned char y8950_read(void *chip, int a)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
return OPLRead(Y8950, a);
|
||
|
}
|
||
|
int y8950_timer_over(void *chip, int c)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
return OPLTimerOver(Y8950, c);
|
||
|
}
|
||
|
|
||
|
void y8950_set_timer_handler(void *chip, OPL_TIMERHANDLER timer_handler, void *param)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPLSetTimerHandler(Y8950, timer_handler, param);
|
||
|
}
|
||
|
void y8950_set_irq_handler(void *chip,OPL_IRQHANDLER IRQHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPLSetIRQHandler(Y8950, IRQHandler, param);
|
||
|
}
|
||
|
void y8950_set_update_handler(void *chip,OPL_UPDATEHANDLER UpdateHandler,void *param)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
OPLSetUpdateHandler(Y8950, UpdateHandler, param);
|
||
|
}
|
||
|
|
||
|
void y8950_set_delta_t_memory(void *chip, void * deltat_mem_ptr, int deltat_mem_size )
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
OPL->deltat->memory = (UINT8 *)(deltat_mem_ptr);
|
||
|
OPL->deltat->memory_size = deltat_mem_size;
|
||
|
}
|
||
|
|
||
|
void y8950_write_pcmrom(void *chip, offs_t ROMSize, offs_t DataStart,
|
||
|
offs_t DataLength, const UINT8* ROMData)
|
||
|
{
|
||
|
FM_OPL *Y8950 = (FM_OPL *)chip;
|
||
|
|
||
|
if (Y8950->deltat->memory_size != ROMSize)
|
||
|
{
|
||
|
Y8950->deltat->memory = (UINT8*)realloc(Y8950->deltat->memory, ROMSize);
|
||
|
Y8950->deltat->memory_size = ROMSize;
|
||
|
memset(Y8950->deltat->memory, 0xFF, ROMSize);
|
||
|
YM_DELTAT_calc_mem_mask(Y8950->deltat);
|
||
|
}
|
||
|
if (DataStart > ROMSize)
|
||
|
return;
|
||
|
if (DataStart + DataLength > ROMSize)
|
||
|
DataLength = ROMSize - DataStart;
|
||
|
|
||
|
memcpy(Y8950->deltat->memory + DataStart, ROMData, DataLength);
|
||
|
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
** 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 y8950_update_one(void *chip, OPLSAMPLE **buffer, int length)
|
||
|
{
|
||
|
int i;
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
UINT8 rhythm = OPL->rhythm&0x20;
|
||
|
YM_DELTAT *DELTAT = OPL->deltat;
|
||
|
OPLSAMPLE *bufL = buffer[0];
|
||
|
OPLSAMPLE *bufR = buffer[1];
|
||
|
|
||
|
for( i=0; i < length ; i++ )
|
||
|
{
|
||
|
int lt;
|
||
|
|
||
|
OPL->output[0] = 0;
|
||
|
OPL->output_deltat[0] = 0;
|
||
|
|
||
|
advance_lfo(OPL);
|
||
|
|
||
|
/* deltaT ADPCM */
|
||
|
if( DELTAT->portstate&0x80 && ! OPL->MuteSpc[5] )
|
||
|
YM_DELTAT_ADPCM_CALC(DELTAT);
|
||
|
|
||
|
/* FM part */
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[0]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[1]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[2]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[3]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[4]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[5]);
|
||
|
|
||
|
if(!rhythm)
|
||
|
{
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[6]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[7]);
|
||
|
OPL_CALC_CH(OPL, &OPL->P_CH[8]);
|
||
|
}
|
||
|
else /* Rhythm part */
|
||
|
{
|
||
|
OPL_CALC_RH(OPL, &OPL->P_CH[0], (OPL->noise_rng>>0)&1 );
|
||
|
}
|
||
|
|
||
|
lt = OPL->output[0] + (OPL->output_deltat[0]>>11);
|
||
|
|
||
|
lt >>= FINAL_SH;
|
||
|
|
||
|
/* limit check */
|
||
|
//lt = limit( lt , MAXOUT, MINOUT );
|
||
|
|
||
|
#ifdef SAVE_SAMPLE
|
||
|
if (which==0)
|
||
|
{
|
||
|
SAVE_ALL_CHANNELS
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/* store to sound buffer */
|
||
|
bufL[i] = lt;
|
||
|
bufR[i] = lt;
|
||
|
|
||
|
advance(OPL);
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
void y8950_set_port_handler(void *chip,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,void * param)
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
OPL->porthandler_w = PortHandler_w;
|
||
|
OPL->porthandler_r = PortHandler_r;
|
||
|
OPL->port_param = param;
|
||
|
}
|
||
|
|
||
|
void y8950_set_keyboard_handler(void *chip,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,void * param)
|
||
|
{
|
||
|
FM_OPL *OPL = (FM_OPL *)chip;
|
||
|
OPL->keyboardhandler_w = KeyboardHandler_w;
|
||
|
OPL->keyboardhandler_r = KeyboardHandler_r;
|
||
|
OPL->keyboard_param = param;
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
|
||
|
void opl_set_mute_mask(void *chip, UINT32 MuteMask)
|
||
|
{
|
||
|
FM_OPL *opl = (FM_OPL *)chip;
|
||
|
UINT8 CurChn;
|
||
|
|
||
|
for (CurChn = 0; CurChn < 9; CurChn ++)
|
||
|
opl->P_CH[CurChn].Muted = (MuteMask >> CurChn) & 0x01;
|
||
|
for (CurChn = 0; CurChn < 6; CurChn ++)
|
||
|
opl->MuteSpc[CurChn] = (MuteMask >> (9 + CurChn)) & 0x01;
|
||
|
|
||
|
return;
|
||
|
}
|