1 // Game_Music_Emu $vers. http://www.slack.net/~ant/
2
3 #include "Rf5C68_Emu.h"
4 #include "rf5c68.h"
5
Rf5C68_Emu()6 Rf5C68_Emu::Rf5C68_Emu() { chip = 0; }
7
~Rf5C68_Emu()8 Rf5C68_Emu::~Rf5C68_Emu()
9 {
10 if ( chip ) device_stop_rf5c68( chip );
11 }
12
set_rate()13 int Rf5C68_Emu::set_rate()
14 {
15 if ( chip )
16 {
17 device_stop_rf5c68( chip );
18 chip = 0;
19 }
20
21 chip = device_start_rf5c68();
22 if ( !chip )
23 return 1;
24
25 reset();
26 return 0;
27 }
28
reset()29 void Rf5C68_Emu::reset()
30 {
31 device_reset_rf5c68( chip );
32 rf5c68_set_mute_mask( chip, 0 );
33 }
34
write(int addr,int data)35 void Rf5C68_Emu::write( int addr, int data )
36 {
37 rf5c68_w( chip, addr, data );
38 }
39
write_mem(int addr,int data)40 void Rf5C68_Emu::write_mem( int addr, int data )
41 {
42 rf5c68_mem_w( chip, addr, data );
43 }
44
write_ram(int start,int length,void * data)45 void Rf5C68_Emu::write_ram( int start, int length, void * data )
46 {
47 rf5c68_write_ram( chip, start, length, (const UINT8 *) data );
48 }
49
mute_voices(int mask)50 void Rf5C68_Emu::mute_voices( int mask )
51 {
52 rf5c68_set_mute_mask( chip, mask );
53 }
54
run(int pair_count,sample_t * out)55 void Rf5C68_Emu::run( int pair_count, sample_t* out )
56 {
57 stream_sample_t bufL[ 1024 ];
58 stream_sample_t bufR[ 1024 ];
59 stream_sample_t * buffers[2] = { bufL, bufR };
60
61 while (pair_count > 0)
62 {
63 int todo = pair_count;
64 if (todo > 1024) todo = 1024;
65 rf5c68_update( chip, buffers, todo );
66
67 for (int i = 0; i < todo; i++)
68 {
69 int output_l = bufL [i];
70 int output_r = bufR [i];
71 output_l += out [0];
72 output_r += out [1];
73 if ( (short)output_l != output_l ) output_l = 0x7FFF ^ ( output_l >> 31 );
74 if ( (short)output_r != output_r ) output_r = 0x7FFF ^ ( output_r >> 31 );
75 out [0] = output_l;
76 out [1] = output_r;
77 out += 2;
78 }
79
80 pair_count -= todo;
81 }
82 }
83