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comparison fmgen/opna.h @ 0:c55ea9478c80

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Hello Gensokyo!
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 21 May 2013 10:29:21 +0200
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-1:000000000000 0:c55ea9478c80
1 #ifndef __OPNA_H__
2 #define __OPNA_H__
3
4 #include <stdint.h>
5 #include "op.h"
6 #include "psg.h"
7
8 // YM2608 (OPNA) ------------------------------------------------------
9 typedef struct _OPNA
10 {
11 int fmvolume;
12 uint32_t clock;
13 uint32_t rate;
14 uint32_t psgrate;
15 uint32_t status;
16 Channel4 ch[6];
17 Channel4* csmch;
18
19 int32_t mixdelta;
20 int mpratio;
21 uint8_t interpolation;
22
23 uint8_t timer_status;
24 uint8_t regtc;
25 uint8_t regta[2];
26
27 int32_t timera, timera_count;
28 int32_t timerb, timerb_count;
29 int32_t timer_step;
30 uint8_t prescale;
31 uint8_t devmask;
32
33 PSG psg;
34
35 Rhythm rhythm[6];
36 int8_t rhythmtl;
37 int rhythmtvol;
38 uint8_t rhythmkey;
39
40 int32_t mixl, mixl1;
41 uint8_t pan[6];
42 uint8_t fnum2[9];
43
44 uint8_t reg22;
45 uint32_t reg29;
46 uint32_t statusnext;
47
48 uint32_t lfocount;
49 uint32_t lfodcount;
50
51 uint32_t fnum[6];
52 uint32_t fnum3[3];
53 } OPNA;
54
55 #ifdef __cplusplus
56 extern "C" {
57 #endif
58
59 // ---------------------------------------------------------------------------
60 uint8_t OPNAInit(OPNA *opna, uint c, uint r, uint8_t ipflag);
61 void OPNAReset(OPNA *opna);
62 void SetVolumeFM(OPNA *opna, int db);
63 void SetVolumeRhythmTotal(OPNA *opna, int db);
64 uint8_t OPNASetRate(OPNA *opna, uint r, uint8_t ipflag);
65 void OPNASetChannelMask(OPNA *opna, uint mask);
66 void OPNASetReg(OPNA *opna, uint addr, uint data);
67 uint8_t OPNATimerCount(OPNA *opna, int32_t us);
68 void OPNAMix(OPNA *opna, Sample* buffer, uint32_t nsamples);
69
70 // ---------------------------------------------------------------------------
71 static inline uint32_t ReadStatus(OPNA *opna) { return opna->status & 0x03; }
72 static inline void SetVolumeRhythm(OPNA *opna, int index, int db)
73 {
74 db = Min(db, 20);
75 opna->rhythm[index].volume = -(db * 2 / 3);
76 }
77
78 static inline int32_t OPNAGetNextEvent(OPNA *opna)
79 {
80 uint32_t ta = ((opna->timera_count + 0xffff) >> 16) - 1;
81 uint32_t tb = ((opna->timerb_count + 0xfff) >> 12) - 1;
82 return (ta < tb ? ta : tb) + 1;
83 }
84
85 #ifdef __cplusplus
86 };
87 #endif
88
89 #endif // FM_OPNA_H