diff options
Diffstat (limited to 'lib/rbcodec/codecs/libgme/ym2413_emu.c')
-rw-r--r-- | lib/rbcodec/codecs/libgme/ym2413_emu.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libgme/ym2413_emu.c b/lib/rbcodec/codecs/libgme/ym2413_emu.c new file mode 100644 index 0000000000..d9ada431ca --- /dev/null +++ b/lib/rbcodec/codecs/libgme/ym2413_emu.c | |||
@@ -0,0 +1,45 @@ | |||
1 | // Game_Music_Emu 0.5.5. http://www.slack.net/~ant/ | ||
2 | |||
3 | #include "ym2413_emu.h" | ||
4 | |||
5 | void Ym2413_init( struct Ym2413_Emu* this ) | ||
6 | { | ||
7 | this->last_time = disabled_time; this->out = 0; | ||
8 | } | ||
9 | |||
10 | int Ym2413_set_rate( struct Ym2413_Emu* this, int sample_rate, int clock_rate ) | ||
11 | { | ||
12 | OPLL_new ( &this->opll, clock_rate, sample_rate ); | ||
13 | OPLL_reset_patch( &this->opll, OPLL_2413_TONE ); | ||
14 | |||
15 | Ym2413_reset( this ); | ||
16 | return 0; | ||
17 | } | ||
18 | |||
19 | void Ym2413_reset( struct Ym2413_Emu* this ) | ||
20 | { | ||
21 | OPLL_reset( &this->opll ); | ||
22 | OPLL_setMask( &this->opll, 0 ); | ||
23 | } | ||
24 | |||
25 | void Ym2413_write( struct Ym2413_Emu* this, int addr, int data ) | ||
26 | { | ||
27 | OPLL_writeIO( &this->opll, 0, addr ); | ||
28 | OPLL_writeIO( &this->opll, 1, data ); | ||
29 | } | ||
30 | |||
31 | void Ym2413_mute_voices( struct Ym2413_Emu* this, int mask ) | ||
32 | { | ||
33 | OPLL_setMask( &this->opll, mask ); | ||
34 | } | ||
35 | |||
36 | void Ym2413_run( struct Ym2413_Emu* this, int pair_count, short* out ) | ||
37 | { | ||
38 | while ( pair_count-- ) | ||
39 | { | ||
40 | int s = OPLL_calc( &this->opll ) << 1; | ||
41 | out [0] = s; | ||
42 | out [1] = s; | ||
43 | out += 2; | ||
44 | } | ||
45 | } | ||