2023-03-09 21:35:56 -08:00
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; Do output filtering
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; First copy old contents across
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; Assumes destination is MixSegment:0
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; data order is lastvalues, coefficients, volumes
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Push CS
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Pop DS
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Assume DS:Driver
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Xor DI, DI
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Mov SI, Offset LastFilter
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Mov EAX, [SI+40h]
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Mov EBX, [SI+44h]
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Mov ECX, [SI+48h]
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Mov EDX, [SI+4Ch]
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Or EAX, EBX
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Or ECX, EDX
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Or EAX, ECX
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JZ NoEqualize
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Mov CX, 80/4
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Mov ES, MixSegment
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Rep MovsD
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; Now do filtering.
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FNInit
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Mov CX, BytesToMix
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Push ES
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Pop DS
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Assume DS:Nothing
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Mov SI, DMABUFFERLENGTH*2+80
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OutputFilter1:
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FILD DWord Ptr [SI] ; Left sample
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FILD DWord Ptr [SI+4] ; R, L
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FLd DWord Ptr [DS:20h] ; LB, R, L
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FMul ST, ST(2) ; L.LB, R, L
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FLd DWord Ptr [DS:20h] ; LB, L.LB, R, L
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FMul ST, ST(2) ; R.LB, L.LB, R, L
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FLd DWord Ptr [DS:0] ; OL, R.LB, L.LB, R, L
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FMul DWord Ptr [DS:24h] ; OL.LB, R.LB, L.LB, R, L
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FLd DWord Ptr [DS:4] ; OR, OL.LB, R.LB, L.LB, R, L
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FMul DWord Ptr [DS:24h] ; OR.LB, OL.LB, R.LB, L.LB, R, L
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FXCh ; OL.LB, OR.LB, R.LB, L.LB, R, L
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FAddP ST(3), ST
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FAdd ; RLB, LLB, R, L
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FLd DWord Ptr [DS:28h] ; MB, RLB, LLB, R, L
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FMul ST, ST(4) ; L.MB, RLB, LLB, R, L
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FLd DWord Ptr [DS:28h] ; MB, L.MB, RLB, LLB, R, L
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FMul ST, ST(4) ; R.MB, L.MB, RLB, LLB, R, L
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FLd DWord Ptr [DS:8] ; OL, R.MB, L.MB, RLB, LLB, R, L
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FMul DWord Ptr [DS:2Ch] ; OL.MB, R.MB, L.MB, RLB, LLB, R, L
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FLd DWord Ptr [DS:0Ch] ; OR, OL.MB, R.MB, L.MB, RLB, LLB, R, L
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FMul DWord Ptr [DS:2Ch] ; OR.MB, OL.MB, R.MB, L.MB, RLB, LLB, R, L
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FXCh ; OL.MB, OR.MB, R.MB, L.MB, RLB, LLB, R, L
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FAddP ST(3), ST
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FAdd ; RMB, LMB, RLB, LLB, R, L
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FXCh ST(3) ; LLB, LMB, RLB, RMB, R, L
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FStP DWord Ptr [DS:0]
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FStP DWord Ptr [DS:8]
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FStP DWord Ptr [DS:4]
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FStP DWord Ptr [DS:0Ch]
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FLd DWord Ptr [DS:30h]
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FMul ST, ST(2)
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FLd DWord Ptr [DS:30h]
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FMul ST, ST(2)
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FLd DWord Ptr [DS:10h]
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FMul DWord Ptr [DS:34h]
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FLd DWord Ptr [DS:14h]
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FMul DWord Ptr [DS:34h]
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FXCh
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FAddP ST(3), ST
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FAdd
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FLd DWord Ptr [DS:38h]
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FMul ST, ST(4)
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FLd DWord Ptr [DS:38h]
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FMul ST, ST(4)
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FLd DWord Ptr [DS:18h]
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FMul DWord Ptr [DS:3Ch]
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FLd DWord Ptr [DS:1Ch]
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FMul DWord Ptr [DS:3Ch]
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FXCh
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FAddP ST(3), ST
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FAdd
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FXCh ST(3)
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FStP DWord Ptr [DS:10h]
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FStP DWord Ptr [DS:18h]
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FStP DWord Ptr [DS:14h]
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FStP DWord Ptr [DS:1Ch] ; R, L
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; For each one, output value += ((band value) - (previous band value)) * Volume
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FLd DWord Ptr [DS:18h]
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FSub DWord Ptr [DS:10h] ; L4, R, L
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FLd DWord Ptr [DS:1Ch]
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FSub DWord Ptr [DS:14h] ; R4, L4, R, L
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FLd DWord Ptr [DS:10h]
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FSub DWord Ptr [DS:8]
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FLd DWord Ptr [DS:14h]
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FSub DWord Ptr [DS:0Ch] ; R3, L3, R4, L4, R, L
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FLd DWord Ptr [DS:8]
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FSub DWord Ptr [DS:0]
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FLd DWord Ptr [DS:0Ch]
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FSub DWord Ptr [DS:4] ; R2, L2, R3, L3, R4, L4, R, L
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FXCh ST(5) ; L4, L2, R3, L3, R4, R2, R, L
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FMul DWord Ptr [DS:4Ch] ; L4V, L2, R3, L3, R4, R2, R, L
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FXCh ST(4) ; R4, L2, R3, L3, L4V, R2, R, L
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FMul DWord Ptr [DS:4Ch] ; R4V, L2, R3, L3, L4V, R2, R, L
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FXCh ST(3) ; L3, L2, R3, R4V, L4V, R2, R, L
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FMul DWord Ptr [DS:48h] ; L3V, L2, R3, R4V, L4V, R2, R, L
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FXCh ST(2) ; R3, L2, L3V, R4V, L4V, R2, R, L
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FMul DWord Ptr [DS:48h] ; R3V, L2, L3V, R4V, L4V, R2, R, L
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FXCh ; L2, R3V, L3V, R4V, L4V, R2, R, L
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FMul DWord Ptr [DS:44h] ; L2V, R3V, L3V, R4V, L4V, R2, R, L
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FXCh ST(5) ; R2, R3V, L3V, R4V, L4V, L2V, R, L
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FMul DWord Ptr [DS:44h] ; R2V, R3V, L3V, R4V, L4V, L2V, R, L
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FXCh ST(4) ; L4V, R3V, L3V, R4V, R2V, L2V, R, L
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FAddP ST(7), ST ; R3V, L3V, R4V, R2V, L2V, R, L
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FAddP ST(5), ST ; L3V, R4V, R2V, L2V, R, L
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FAddP ST(3), ST
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FAdd
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FLd DWord Ptr [DS:0]
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FMul DWord Ptr [DS:40h] ; L1V, RV, LV, R, L
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FLd DWord Ptr [DS:4] ;
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FMul DWord Ptr [DS:40h] ; R1V, L1V, RV, LV, R, L
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FXCh ST(2) ; RV, L1V, R1V, LV, R, L
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FAddP ST(4), ST ; L1V, R1V, LV, R, L
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FAddP ST(4), ST ; R1V, LV, R, L
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FAddP ST(2), ST
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FAddP ST(2), ST
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FIStP DWord Ptr [SI+4]
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FIStP DWord Ptr [SI]
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Add SI, 8
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Dec CX
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JNZ OutputFilter1
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; Transfer contents out
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Push CS
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Pop ES
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Mov DI, Offset LastFilter
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Xor SI, SI
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Mov CX, 32/4
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Rep MovsD
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; Finished output filtering!
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NoEqualize:
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