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Diffstat (limited to 'src/emu/sound/scsplfo.c')
-rw-r--r--src/emu/sound/scsplfo.c48
1 files changed, 24 insertions, 24 deletions
diff --git a/src/emu/sound/scsplfo.c b/src/emu/sound/scsplfo.c
index 3b493a87800..20216ce7d62 100644
--- a/src/emu/sound/scsplfo.c
+++ b/src/emu/sound/scsplfo.c
@@ -8,20 +8,20 @@
MAME/M1 conversion and cleanup by R. Belmont
*/
-#define LFO_SHIFT 8
+#define LFO_SHIFT 8
struct LFO_t
{
- unsigned short phase;
- UINT32 phase_step;
- int *table;
- int *scale;
+ unsigned short phase;
+ UINT32 phase_step;
+ int *table;
+ int *scale;
};
-#define LFIX(v) ((unsigned int) ((float) (1<<LFO_SHIFT)*(v)))
+#define LFIX(v) ((unsigned int) ((float) (1<<LFO_SHIFT)*(v)))
//Convert DB to multiply amplitude
-#define DB(v) LFIX(pow(10.0,v/20.0))
+#define DB(v) LFIX(pow(10.0,v/20.0))
//Convert cents to step increment
#define CENTS(v) LFIX(pow(2.0,v/1200.0))
@@ -40,9 +40,9 @@ static int ASCALES[8][256];
static void LFO_Init(running_machine &machine)
{
- int i,s;
- for(i=0;i<256;++i)
- {
+ int i,s;
+ for(i=0;i<256;++i)
+ {
int a,p;
// float TL;
//Saw
@@ -90,7 +90,7 @@ static void LFO_Init(running_machine &machine)
p=128-a;
ALFO_NOI[i]=a;
PLFO_NOI[i]=p;
- }
+ }
for(s=0;s<8;++s)
{
@@ -110,11 +110,11 @@ static void LFO_Init(running_machine &machine)
INLINE signed int PLFO_Step(LFO_t *LFO)
{
int p;
- LFO->phase+=LFO->phase_step;
+ LFO->phase+=LFO->phase_step;
#if LFO_SHIFT!=8
- LFO->phase&=(1<<(LFO_SHIFT+8))-1;
+ LFO->phase&=(1<<(LFO_SHIFT+8))-1;
#endif
- p=LFO->table[LFO->phase>>LFO_SHIFT];
+ p=LFO->table[LFO->phase>>LFO_SHIFT];
p=LFO->scale[p+128];
return p<<(SHIFT-LFO_SHIFT);
}
@@ -122,21 +122,21 @@ INLINE signed int PLFO_Step(LFO_t *LFO)
INLINE signed int ALFO_Step(LFO_t *LFO)
{
int p;
- LFO->phase+=LFO->phase_step;
+ LFO->phase+=LFO->phase_step;
#if LFO_SHIFT!=8
- LFO->phase&=(1<<(LFO_SHIFT+8))-1;
+ LFO->phase&=(1<<(LFO_SHIFT+8))-1;
#endif
- p=LFO->table[LFO->phase>>LFO_SHIFT];
+ p=LFO->table[LFO->phase>>LFO_SHIFT];
p=LFO->scale[p];
return p<<(SHIFT-LFO_SHIFT);
}
static void LFO_ComputeStep(LFO_t *LFO,UINT32 LFOF,UINT32 LFOWS,UINT32 LFOS,int ALFO)
{
- float step=(float) LFOFreq[LFOF]*256.0/(float)44100;
- LFO->phase_step=(unsigned int) ((float) (1<<LFO_SHIFT)*step);
- if(ALFO)
- {
+ float step=(float) LFOFreq[LFOF]*256.0/(float)44100;
+ LFO->phase_step=(unsigned int) ((float) (1<<LFO_SHIFT)*step);
+ if(ALFO)
+ {
switch(LFOWS)
{
case 0: LFO->table=ALFO_SAW; break;
@@ -150,10 +150,10 @@ static void LFO_ComputeStep(LFO_t *LFO,UINT32 LFOF,UINT32 LFOWS,UINT32 LFOS,int
{
switch(LFOWS)
{
- case 0: LFO->table=PLFO_SAW; break;
- case 1: LFO->table=PLFO_SQR; break;
+ case 0: LFO->table=PLFO_SAW; break;
+ case 1: LFO->table=PLFO_SQR; break;
case 2: LFO->table=PLFO_TRI; break;
- case 3: LFO->table=PLFO_NOI; break;
+ case 3: LFO->table=PLFO_NOI; break;
}
LFO->scale=PSCALES[LFOS];
}