int32 lowp; // 0 through 65536, 65536 = max low pass(total attenuation)
// 65536 = no low pass
+static int32 flt_acc=0, flt_acc2=0;
+
static void FilterSound(uint32 *in, int16 *outMono, int count)
{
- static int32 acc=0, acc2=0;
// static int min=0, max=0;
for(;count;count--,in++,outMono++)
{
int32 diff;
- diff = *in - acc;
+ diff = *in - flt_acc;
- acc += (diff*highp)>>16;
- acc2+= (int32) (((int64)((diff-acc2)*lowp))>>16);
+ flt_acc += (diff*highp)>>16;
+ flt_acc2+= (int32) (((int64)((diff-flt_acc2)*lowp))>>16);
*in=0;
- *outMono = acc2*7 >> 2; // * 1.75
+ *outMono = flt_acc2*7 >> 2; // * 1.75
// if (acc2 < min) { printf("min: %i %04x\n", acc2, acc2); min = acc2; }
// if (acc2 > max) { printf("max: %i %04x\n", acc2, acc2); max = acc2; }
}
if(highp>(1<<16)) highp=1<<16;
if(lowp>(1<<16)) lowp=1<<16;
+
+ flt_acc=flt_acc2=0;
}
void FixOldSaveStateSFreq(void)