c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 1999,2000 Tatsuyuki Satoh |
5 | * Copyright (C) 2001,2002 Ben Parnell |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation; either version 2 of the License, or |
10 | * (at your option) any later version. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * GNU General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program; if not, write to the Free Software |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
20 | */ |
21 | /* This file has been heavily modified from the original(mostly unused |
22 | code was removed). If you want to use it for anything other than |
23 | VRC7 sound emulation, you should get the original from the AdPlug |
24 | source distribution or the MAME(version 0.37b16) source distribution |
25 | (but be careful about the different licenses). |
26 | - Xodnizel |
27 | */ |
28 | |
29 | #ifndef __FMOPL_H_ |
30 | #define __FMOPL_H_ |
31 | |
32 | /* --- system optimize --- */ |
33 | /* select bit size of output : 8 or 16 */ |
34 | #define OPL_OUTPUT_BIT 16 |
35 | |
36 | /* compiler dependence */ |
37 | #ifndef OSD_CPU_H |
38 | #define OSD_CPU_H |
39 | |
40 | typedef unsigned char UINT8; /* unsigned 8bit */ |
41 | typedef unsigned short UINT16; /* unsigned 16bit */ |
42 | typedef unsigned long UINT32; /* unsigned 32bit */ |
43 | typedef signed char INT8; /* signed 8bit */ |
44 | typedef signed short INT16; /* signed 16bit */ |
45 | typedef signed long INT32; /* signed 32bit */ |
46 | #endif |
47 | |
48 | #if (OPL_OUTPUT_BIT==16) |
49 | typedef INT16 OPLSAMPLE; |
50 | #endif |
51 | #if (OPL_OUTPUT_BIT==8) |
52 | typedef unsigned char OPLSAMPLE; |
53 | #endif |
54 | |
55 | |
56 | /* !!!!! here is private section , do not access there member direct !!!!! */ |
57 | |
58 | #define OPL_TYPE_WAVESEL 0x01 /* waveform select */ |
59 | |
60 | /* Saving is necessary for member of the 'R' mark for suspend/resume */ |
61 | /* ---------- OPL one of slot ---------- */ |
62 | typedef struct fm_opl_slot { |
63 | INT32 TL; /* total level :TL << 8 */ |
64 | INT32 TLL; /* adjusted now TL */ |
65 | UINT8 KSR; /* key scale rate :(shift down bit) */ |
66 | INT32 *AR; /* attack rate :&AR_TABLE[AR<<2] */ |
67 | INT32 *DR; /* decay rate :&DR_TALBE[DR<<2] */ |
68 | INT32 SL; /* sustin level :SL_TALBE[SL] */ |
69 | INT32 *RR; /* release rate :&DR_TABLE[RR<<2] */ |
70 | UINT8 ksl; /* keyscale level :(shift down bits) */ |
71 | UINT8 ksr; /* key scale rate :kcode>>KSR */ |
72 | UINT32 mul; /* multiple :ML_TABLE[ML] */ |
73 | UINT32 Cnt; /* frequency count : */ |
74 | UINT32 Incr; /* frequency step : */ |
75 | /* envelope generator state */ |
76 | UINT8 eg_typ; /* envelope type flag */ |
77 | UINT8 evm; /* envelope phase */ |
78 | INT32 evc; /* envelope counter */ |
79 | INT32 eve; /* envelope counter end point */ |
80 | INT32 evs; /* envelope counter step */ |
81 | INT32 evsa; /* envelope step for AR :AR[ksr] */ |
82 | INT32 evsd; /* envelope step for DR :DR[ksr] */ |
83 | INT32 evsr; /* envelope step for RR :RR[ksr] */ |
84 | /* LFO */ |
85 | UINT8 ams; /* ams flag */ |
86 | UINT8 vib; /* vibrate flag */ |
87 | /* wave selector */ |
88 | INT32 **wavetable; |
89 | }OPL_SLOT; |
90 | |
91 | /* ---------- OPL one of channel ---------- */ |
92 | typedef struct fm_opl_channel { |
93 | OPL_SLOT SLOT[2]; |
94 | UINT8 CON; /* connection type */ |
95 | UINT8 FB; /* feed back :(shift down bit) */ |
96 | INT32 *connect1; /* slot1 output pointer */ |
97 | INT32 *connect2; /* slot2 output pointer */ |
98 | INT32 op1_out[2]; /* slot1 output for selfeedback */ |
99 | /* phase generator state */ |
100 | UINT32 block_fnum; /* block+fnum : */ |
101 | UINT8 kcode; /* key code : KeyScaleCode */ |
102 | UINT32 fc; /* Freq. Increment base */ |
103 | UINT32 ksl_base; /* KeyScaleLevel Base step */ |
104 | UINT8 keyon; /* key on/off flag */ |
105 | } OPL_CH; |
106 | |
107 | /* OPL state */ |
108 | typedef struct fm_opl_f { |
109 | UINT8 type; /* chip type */ |
110 | int clock; /* master clock (Hz) */ |
111 | int rate; /* sampling rate (Hz) */ |
112 | double freqbase; /* frequency base */ |
113 | double TimerBase; /* Timer base time (==sampling time) */ |
114 | UINT8 address; /* address register */ |
115 | UINT32 mode; /* Reg.08 : CSM , notesel,etc. */ |
116 | |
117 | /* FM channel slots */ |
118 | OPL_CH *P_CH; /* pointer of CH */ |
119 | int max_ch; /* maximum channel */ |
120 | |
121 | /* time tables */ |
122 | INT32 AR_TABLE[75]; /* atttack rate tables */ |
123 | INT32 DR_TABLE[75]; /* decay rate tables */ |
124 | UINT32 FN_TABLE[1024]; /* fnumber -> increment counter */ |
125 | /* LFO */ |
126 | INT32 *ams_table; |
127 | INT32 *vib_table; |
128 | INT32 amsCnt; |
129 | INT32 amsIncr; |
130 | INT32 vibCnt; |
131 | INT32 vibIncr; |
132 | /* wave selector enable flag */ |
133 | UINT8 wavesel; |
134 | |
135 | } FM_OPL; |
136 | |
137 | /* ---------- Generic interface section ---------- */ |
138 | #define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL) |
139 | |
140 | FM_OPL *OPLCreate(int type, int clock, int rate); |
141 | void OPLDestroy(FM_OPL *OPL); |
142 | |
143 | void OPLResetChip(FM_OPL *OPL); |
144 | void OPLWrite(FM_OPL *OPL,UINT8 a,UINT8 v); |
145 | |
146 | /* YM3626/YM3812 local section */ |
147 | void YM3812UpdateOne(FM_OPL *OPL, UINT32 *buffer, int length); |
148 | |
149 | #endif |