blob: 60ea16312fb16e65d2857cb58ca8677de77c417f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// Konami VRC7 sound chip emulator
#ifndef NES_VRC7_APU_H
#define NES_VRC7_APU_H
#include "blargg_common.h"
#include "Blip_Buffer.h"
struct vrc7_snapshot_t;
class Nes_Vrc7_Apu {
public:
blargg_err_t init();
// See Nes_Apu.h for reference
void reset();
void volume( double );
void treble_eq( blip_eq_t const& );
void set_output( Blip_Buffer* );
enum { osc_count = 6 };
void set_output( int index, Blip_Buffer* );
void end_frame( blip_time_t );
void save_snapshot( vrc7_snapshot_t* ) const;
void load_snapshot( vrc7_snapshot_t const& );
void write_reg( int reg );
void write_data( blip_time_t, int data );
public:
Nes_Vrc7_Apu();
~Nes_Vrc7_Apu();
BLARGG_DISABLE_NOTHROW
private:
// noncopyable
Nes_Vrc7_Apu( const Nes_Vrc7_Apu& );
Nes_Vrc7_Apu& operator = ( const Nes_Vrc7_Apu& );
struct Vrc7_Osc
{
BOOST::uint8_t regs [3];
Blip_Buffer* output;
int last_amp;
};
Vrc7_Osc oscs [osc_count];
void* opll;
int addr;
blip_time_t next_time;
struct {
Blip_Buffer* output;
int last_amp;
} mono;
Blip_Synth_Fast synth;
void run_until( blip_time_t );
void output_changed();
};
struct vrc7_snapshot_t
{
BOOST::uint8_t latch;
BOOST::uint8_t inst [8];
BOOST::uint8_t regs [6] [3];
BOOST::uint8_t delay;
};
inline void Nes_Vrc7_Apu::set_output( int i, Blip_Buffer* buf )
{
assert( (unsigned) i < osc_count );
oscs [i].output = buf;
output_changed();
}
// DB2LIN_AMP_BITS == 11, * 2
inline void Nes_Vrc7_Apu::volume( double v ) { synth.volume( 1.0 / 3 / 4096 * v ); }
inline void Nes_Vrc7_Apu::treble_eq( blip_eq_t const& eq ) { synth.treble_eq( eq ); }
#endif
|
