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comparison fmgen/psg.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 __PSG_H__
2 #define __PSG_H__
3
4 #include <stdint.h>
5 #define PSG_SAMPLETYPE int32_t // any of int16_t, int32_t or float will work here.
6
7 // Constants for the shift amounts used in the counters.
8 //
9 enum {
10 toneshift = 24,
11 envshift = 22
12 };
13
14 typedef struct _PSG {
15 uint8_t reg[16];
16
17 const uint32_t *envelop;
18 uint32_t rng;
19 uint32_t olevel[3];
20 uint32_t scount[3], speriod[3];
21 uint32_t ecount, eperiod;
22 uint32_t ncount, nperiod;
23 uint32_t tperiodbase;
24 uint32_t eperiodbase;
25 int volume;
26 int mask;
27 } PSG;
28
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32
33 // Mostly self-explanatory.
34 // Actual descriptions of each function can be found in psg.c
35 // Also, PSGGetReg() is basically useless.
36 // (More info on that can *also* be found in psg.c).
37 void PSGInit(PSG *psg);
38 void PSGReset(PSG *psg);
39 void PSGSetClock(PSG *psg, uint32_t clock, uint32_t rate);
40 void SetVolumePSG(PSG *psg, int volume);
41 void PSGSetChannelMask(PSG *psg, int c);
42 void PSGSetReg(PSG *psg, uint8_t regnum, uint8_t data);
43 void PSGMix(PSG *psg, int32_t *dest, uint32_t nsamples);
44
45 static inline uint32_t PSGGetReg(PSG *psg, uint8_t regnum) {
46 return psg->reg[regnum & 0x0f];
47 }
48
49 #ifdef __cplusplus
50 };
51 #endif
52
53 #endif // PSG_H