1 // Game_Music_Emu $vers. http://www.slack.net/~ant/
2
3 #include "K054539_Emu.h"
4 #include "k054539.h"
5
K054539_Emu()6 K054539_Emu::K054539_Emu() { chip = 0; }
7
~K054539_Emu()8 K054539_Emu::~K054539_Emu()
9 {
10 if ( chip ) device_stop_k054539( chip );
11 }
12
set_rate(int clock_rate,int flags)13 int K054539_Emu::set_rate( int clock_rate, int flags )
14 {
15 if ( chip )
16 {
17 device_stop_k054539( chip );
18 chip = 0;
19 }
20
21 chip = device_start_k054539( clock_rate );
22 if ( !chip )
23 return 1;
24
25 k054539_init_flags( chip, flags );
26
27 reset();
28 return 0;
29 }
30
reset()31 void K054539_Emu::reset()
32 {
33 device_reset_k054539( chip );
34 k054539_set_mute_mask( chip, 0 );
35 }
36
write(int addr,int data)37 void K054539_Emu::write( int addr, int data )
38 {
39 k054539_w( chip, addr, data);
40 }
41
write_rom(int size,int start,int length,void * data)42 void K054539_Emu::write_rom( int size, int start, int length, void * data )
43 {
44 k054539_write_rom( chip, size, start, length, (const UINT8 *) data );
45 }
46
mute_voices(int mask)47 void K054539_Emu::mute_voices( int mask )
48 {
49 k054539_set_mute_mask( chip, mask );
50 }
51
run(int pair_count,sample_t * out)52 void K054539_Emu::run( int pair_count, sample_t* out )
53 {
54 stream_sample_t bufL[ 1024 ];
55 stream_sample_t bufR[ 1024 ];
56 stream_sample_t * buffers[2] = { bufL, bufR };
57
58 while (pair_count > 0)
59 {
60 int todo = pair_count;
61 if (todo > 1024) todo = 1024;
62 k054539_update( chip, buffers, todo );
63
64 for (int i = 0; i < todo; i++)
65 {
66 int output_l = bufL [i];
67 int output_r = bufR [i];
68 output_l += out [0];
69 output_r += out [1];
70 if ( (short)output_l != output_l ) output_l = 0x7FFF ^ ( output_l >> 31 );
71 if ( (short)output_r != output_r ) output_r = 0x7FFF ^ ( output_r >> 31 );
72 out [0] = output_l;
73 out [1] = output_r;
74 out += 2;
75 }
76
77 pair_count -= todo;
78 }
79 }
80