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impulsetracker/SoundDrivers/WAV.MIX

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Added sound drivers to repository
2014-12-24 20:01:52 -08:00
;
; WAV output mix functions....
; Uses Cubic Spline Interpolation
;
ALIGN 4
WAVMixingTable Label
; 8 bit, 16 bit
; No sound, stereo, surround
; No loop, forwards loop, ping pong loop
DW Offset UpdateNoLoop, 0, 0, 0, 0
DW Offset UpdateForwardsLoop, 0, 0, 0, 0
DW Offset UpdatePingPongLoop, 0, 0, 0, 0
DW Offset MixNoLoop, PreM32SMix8Bit, MFS8Bit, MBS8Bit, Mix32Stereo8Bit
DW Offset MixForwardsLoop, PreM32SMix8Bit, MFS8Bit, MBS8Bit, Mix32Stereo8Bit
DW Offset MixPingPongLoop, PreM32SMix8Bit, MFS8Bit, MBS8Bit, Mix32Stereo8Bit
DW Offset MixNoLoop, PreM32UMix8Bit, MFS8Bit, MBS8Bit, Mix32Surround8Bit
DW Offset MixForwardsLoop, PreM32UMix8Bit, MFS8Bit, MBS8Bit, Mix32Surround8Bit
DW Offset MixPingPongLoop, PreM32UMix8Bit, MFS8Bit, MBS8Bit, Mix32Surround8Bit
DW Offset UpdateNoLoop, 0, 0, 0, 0
DW Offset UpdateForwardsLoop, 0, 0, 0, 0
DW Offset UpdatePingPongLoop, 0, 0, 0, 0
DW Offset MixNoLoop, PreM32SMix16Bit, MFS16Bit, MBS16Bit, Mix32Stereo16Bit
DW Offset MixForwardsLoop, PreM32SMix16Bit, MFS16Bit, MBS16Bit, Mix32Stereo16Bit
DW Offset MixPingPongLoop, PreM32SMix16Bit, MFS16Bit, MBS16Bit, Mix32Stereo16Bit
DW Offset MixNoLoop, PreM32UMix16Bit, MFS16Bit, MBS16Bit, Mix32Surround16Bit
DW Offset MixForwardsLoop, PreM32UMix16Bit, MFS16Bit, MBS16Bit, Mix32Surround16Bit
DW Offset MixPingPongLoop, PreM32UMix16Bit, MFS16Bit, MBS16Bit, Mix32Surround16Bit
LastLeftValue DD 0
LastRightValue DD 0
Sample1 DD 0
Sample2 DD 0
Sample3 DD 0
Sample4 DD 0
SampleValue DD 0
InterpolationOffset DD 0
Const3 DD 3.0
Const1On65536 DD 37800000h
Const256On6 DD 422AAAAAh
Const1On6 DD 3E2AAAAAh
;Const65536 DD 65536.0
Const32768 DD 32768.0
Const1On32768 DD 38000000h
;ConstLimiter DD 3F000000h
Const22713_0 DD 22713.0
MAXFILTERVALUE EQU 47000000h
FILTERCLIPPINGTYPENONE EQU 0
FILTERCLIPPINGTYPECOMPRESSOR EQU 1
FILTERCLIPPINGTYPELIMIT EQU 0
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Get8BitWaveform Macro ; Puts waveform value in EBX, range -32k->+32k
Local X
IF CUBICINTERPOLATION
Mov BX, DI
Push EDX
Push DS
Push CS
Pop DS
Assume DS:Driver
Sub BX, 1
Mov InterpolationOffset, ECX
AdC BX, 0
FILD InterpolationOffset
FMul Const1On65536
MovSX EAX, Byte Ptr [ES:BX]
MovSX EBX, Byte Ptr [ES:DI]
Mov Sample1, EAX
Mov Sample2, EBX
FILD Sample1
FILD Sample2
FMul Const3
MovSX EAX, Byte Ptr [ES:DI+1]
MovSX EBX, Byte Ptr [ES:DI+2]
Mov Sample3, EAX
Mov Sample4, EBX
FILD Sample3
FMul Const3
FILD Sample4 ; x, 3w, 3v, u, Interp
; a = x+3v-3w-u
; b = 3w+3u-6v
; c = 6w-2u-x-3v
; d = 6v
; Assignments:
; F = x+3v
; -> a = F-3w-u
; -> b = 3w+3u-6v
; -> c = 6w-2u-F
; -> d = 6v
IF INTELOPTIMISED
FAdd ST, ST(2) ; x+3v[3], 3w, 3v, u, Interp
FLd ST(1) ; 3w, x+3v[3], 3w, 3v, u, Interp
FAdd ST, ST(4) ; 3w+u[3], x+3v[2], 3w, 3v, u, Interp
FXCh ST(4) ; u, x+3v[2], 3w, 3v, 3w+u[3], Interp
FAdd ST, ST ; 2u[3], x+3v[1], 3w, 3v, 3w+u[2], Interp
FXCh ST(3) ; 3v, x+3v[1], 3w, 2u[3], 3w+u[2], Interp
FLd ST(1) ; x+3v, 3v, x+3v, 3w, 2u[3], 3w+u[1], Interp
FSub ST, ST(5) ; a[3], 3v, x+3v, 3w, 2u[2], 3w+u, Interp
FXCh ; 3v, a[3], x+3v, 3w, 2u[2], 3w+u, Interp
FAdd ST, ST ; 6v[3], a[2], x+3v, 3w, 2u[1], 3w+u, Interp
FXCh ST(5) ; 3w+u, a[2], x+3v, 3w, 2u[1], 6v[3], Interp
FAdd ST, ST(4) ; 3w+3u[3], a[1], x+3v, 3w, 2u, 6v[2], Interp
FXCh ; a[1], 3w+3u[3], x+3v, 3w, 2u, 6v[2], Interp
FMul ST, ST(6) ; ax[3], 3w+3u[2], x+3v, 3w, 2u, 6v[1], Interp
FXCh ST(2) ; x+3v, 3w+3u[2], ax[3], 3w, 2u, 6v[1], Interp
FAddP ST(4), ST ; 3w+3u[1], ax[2], 3w, 2u+F[3], 6v, Interp
FSub ST, ST(4) ; 3w+3u-6v[3], ax[1], 3w, 2u+F[2], 6v, Interp
FXCh ST(2) ; 3w, ax[1], b[3], 2u+F[1], 6v, Interp
FAdd ST, ST ; 6w[3], ax, b[2], 2u+F, 6v, Interp
FXCh ; ax, 6w[3], b[2], 2u+F, 6v, Interp
FAddP ST(2), ST ; 6w[1], ax+b[3], 2u+f, d, Interp
FSubRP ST(2), ST ; ax+b, c[3], d, Interp
FMul ST, ST(3) ; ax^2+bx[3], c[2], d, Interp
FXCh ST(3) ; Interp, c[2], d, ax^2+bx[3]
FMul Const256On6 ; sInterp[3], c, d, ax^2+bx[1]
FXCh ; c, sInterp[3], d, ax^2+bx[1]
FAddP ST(3), ST ; sInterp[2], d, ax^2+bx+c[3]
FXCh ; d, sInterp[2], ax^2+bx+c[3]
FMul Const256On6 ; sd[3], sInterp[1], ax^2+bx+c[2]
FXCh ; sInterp[1], sd[3], ax^2+bx+c[2]
FMulP ST(2), ST
Pop DS
Assume DS:Nothing
Mov EDX, [DS:0]
FAdd ; SampleValue (16 bit value)
FLd DWord Ptr [DS:0] ; x(k-1), x(k)
FMul DWord Ptr [DS:14h] ; b.x(k-1), x(k)
FLd DWord Ptr [DS:4] ; x(k-2), b.x(k-1), x(k)
FMul DWord Ptr [DS:18h] ; c.x(k-2), b.x(k-1), x(k)
FXCh ST(2) ; x(k), b.x(k-1), c.x(k-2)
FMul DWord Ptr [DS:10h] ; a.x(k), b.x(k-1), c.x(k-2)
FXCh ST(2) ; c.x(k-2), b.x(k-1), a.x(k)
FAdd
Mov EDX, [DS:0]
FAdd
Mov [DS:4], EDX
FSt DWord Ptr [DS:0]
FIStP CS:SampleValue
ELSE
FAdd ST, ST(2) ; x+3v, 3w, 3v, u, Interp
FLd ST(1) ; 3w, x+3v, 3w, 3v, u, Interp
FSub ST, ST(4) ; 3w-u, x+3v, 3w, 3v, u, Interp
FAdd ST, ST ; 6w-2u, x+3v, 3w, 3v, u, Interp
FSub ST, ST(1) ; "c", x+3v, 3w, 3v, u, Interp
FXCh ; x+3v, "c", 3w, 3v, u, Interp
FSub ST, ST(2) ; x+3v-3w, "c", 3w, 3v, u, Interp
FSub ST, ST(4) ; "a", "c", 3w, 3v, u, Interp
FMul ST, ST(5) ; "ax", "c", 3w, 3v, u, Interp
FXCh ST(3) ; 3v, "c", 3w, "ax", u, Interp
FAdd ST, ST ; 6v, "c", 3w, "ax", u, Interp
FXCh ST(4) ; u, "c", 3w, "ax", 6v, Interp
FMul Const3 ; 3u, "c", 3w, "ax", 6v, Interp
FSub ST, ST(4) ; 3u-6v, "c", 3w, "ax", 6v, Interp
FAdd ST, ST(2) ; "b", "c", 3w, "ax", 6v, Interp
FAdd ST, ST(3) ; "ax+b", "c", 3w, "ax", 6v, Interp
FMul ST, ST(5) ; "ax^2+bx", "c", 3w, "ax", 6v, Interp
FAdd ; ax^2+bx+c, 3w, "ax", 6v, Interp
FMulP ST(4), ST ; 3w, "ax", 6v, ax^3+bx^2+cx
FComPP ; 6v, ax^3+bx^2+cx
FAdd ; SampleValue
FMul Const256On6 ; x(k)
Pop DS
Assume DS:Nothing
FMul DWord Ptr [DS:10h]
FLd DWord Ptr [DS:0] ; x(k-1), x(k)
FMul DWord Ptr [DS:14h] ; b.x(k-1), x(k)
FLd DWord Ptr [DS:4] ; x(k-2), b.x(k-1), x(k)
FMul DWord Ptr [DS:18h] ; c.x(k-2), b.x(k-1), x(k)
FAdd
Mov EDX, [DS:0]
FAdd
Mov [DS:4], EDX
FSt DWord Ptr [DS:0]
FIStP SampleValue
ENDIF
Pop EDX
IF FILTERCLIPPINGTYPENONE
ELSE
Mov EAX, [DS:0]
And EAX, 7FFFFFFFh
Cmp EAX, MAXFILTERVALUE
JBE X
IF FILTERCLIPPINGTYPECOMPRESSOR
Mov EBX, [DS:0]
FLd CS:Const22713_0
FLd DWord Ptr [DS:0]
FAbs
FMul CS:Const1On32768
FYL2X ; ST = ln(x/65536) / ln(2) * 65536 * ln(2)
FAdd CS:Const32768
SAR EBX, 31
FIStP SampleValue
Xor SampleValue, EBX
Sub SampleValue, EBX
Comment ~
Mov EBX, [DS:0]
FLd DWord Ptr [DS:0]
FAbs
FSub [CS:Const65536]
FMul [CS:ConstLimiter]
FAdd [CS:Const65536]
SAR EBX, 31
FIStP SampleValue
Xor SampleValue, EBX
Sub SampleValue, EBX
; FILD SampleValue
; FStP DWord Ptr [DS:0]
~
ENDIF
IF FILTERCLIPPINGTYPELIMIT
Mov EBX, [DS:0]
Mov EAX, MAXFILTERVALUE
And EBX, 80000000h
Or EAX, EBX
Mov [DS:0], EAX
ENDIF
X:
ENDIF
Mov EBX, SampleValue
ENDIF
IF QUADRATICINTERPOLATION
Push EDX
Push EBP
MovSX EDX, Byte Ptr [ES:DI+2] ; v
MovSX EBX, Byte Ptr [ES:DI] ; t
MovSX EAX, Byte Ptr [ES:DI+1] ; u
LEA EBP, [EBX+EDX] ; v+t
SAR EBP, 1
Sub EBP, EAX ; (v+t)/2 - u
IMul EBP, ECX ; ax in 8.16 format
SAR EBP, 10 ; ax in 8.6 format
ShL EAX, 7 ; EBX = 2u<<6
Add EDX, EBX ; EDX = v+t
Add EBX, EBX ; EAX = 2t
Add EBP, EAX ; EBP = ax+2u
Add EDX, EBX ; 3t+v
ShL EDX, 5 ; (3t+v)/2 << 6
Sub EBP, EDX ; ax+b
ShL EBX, 7
IMul EBP, ECX ; ax^2+bx in 8.22 form
SAR EBP, 14 ; ax^2+bx in 8.8 form
Add EBX, EBP ; ax^2+bx+c
Pop EBP
Pop EDX
ENDIF
IF LINEARINTERPOLATION
MovSX EBX, Byte Ptr [ES:DI+1]
MovSX EAX, Byte Ptr [ES:DI]
Sub EBX, EAX
IMul EBX, ECX
SAR EBX, 8
ShL EAX, 8
Add EBX, EAX
ENDIF
IF POINTSAMPLED
MovSX EBX, Byte Ptr [ES:DI]
ShL EBX, 8
ENDIF
EndM
Get16BitWaveform Macro ; Puts waveform value in EBX, range -32k->+32k
Local X
IF CUBICINTERPOLATION
Mov EBX, EDI
Push EDX
Push DS
Push CS
Pop DS
Assume DS:Driver
Sub BX, 1
Mov InterpolationOffset, ECX
AdC BX, 0
FILD InterpolationOffset
FMul Const1On65536
MovSX EAX, Word Ptr [ES:EBX+EBX]
MovSX EBX, Word Ptr [ES:EDI+EDI]
Mov Sample1, EAX
Mov Sample2, EBX
FILD Sample1
FILD Sample2
FMul Const3
MovSX EAX, Word Ptr [ES:EDI+EDI+2]
MovSX EBX, Word Ptr [ES:EDI+EDI+4]
Mov Sample3, EAX
Mov Sample4, EBX
FILD Sample3
FMul Const3
FILD Sample4 ; x, 3w, 3v, u, Interp
; a = x+3v-3w-u
; b = 3w+3u-6v
; c = 6w-2u-x-3v
; d = 6v
; Assignments:
; F = x+3v
; -> a = F-3w-u
; -> b = 3w+3u-6v
; -> c = 6w-2u-F
; -> d = 6v
IF INTELOPTIMISED
FAdd ST, ST(2) ; x+3v[3], 3w, 3v, u, Interp
FLd ST(1) ; 3w, x+3v[3], 3w, 3v, u, Interp
FAdd ST, ST(4) ; 3w+u[3], x+3v[2], 3w, 3v, u, Interp
FXCh ST(4) ; u, x+3v[2], 3w, 3v, 3w+u[3], Interp
FAdd ST, ST ; 2u[3], x+3v[1], 3w, 3v, 3w+u[2], Interp
FXCh ST(3) ; 3v, x+3v[1], 3w, 2u[3], 3w+u[2], Interp
FLd ST(1) ; x+3v, 3v, x+3v, 3w, 2u[3], 3w+u[1], Interp
FSub ST, ST(5) ; a[3], 3v, x+3v, 3w, 2u[2], 3w+u, Interp
FXCh ; 3v, a[3], x+3v, 3w, 2u[2], 3w+u, Interp
FAdd ST, ST ; 6v[3], a[2], x+3v, 3w, 2u[1], 3w+u, Interp
FXCh ST(5) ; 3w+u, a[2], x+3v, 3w, 2u[1], 6v[3], Interp
FAdd ST, ST(4) ; 3w+3u[3], a[1], x+3v, 3w, 2u, 6v[2], Interp
FXCh ; a[1], 3w+3u[3], x+3v, 3w, 2u, 6v[2], Interp
FMul ST, ST(6) ; ax[3], 3w+3u[2], x+3v, 3w, 2u, 6v[1], Interp
FXCh ST(2) ; x+3v, 3w+3u[2], ax[3], 3w, 2u, 6v[1], Interp
FAddP ST(4), ST ; 3w+3u[1], ax[2], 3w, 2u+F[3], 6v, Interp
FSub ST, ST(4) ; 3w+3u-6v[3], ax[1], 3w, 2u+F[2], 6v, Interp
FXCh ST(2) ; 3w, ax[1], b[3], 2u+F[1], 6v, Interp
FAdd ST, ST ; 6w[3], ax, b[2], 2u+F, 6v, Interp
FXCh ; ax, 6w[3], b[2], 2u+F, 6v, Interp
FAddP ST(2), ST ; 6w[1], ax+b[3], 2u+f, d, Interp
FSubRP ST(2), ST ; ax+b, c[3], d, Interp
FMul ST, ST(3)
FXCh ST(3) ; Interp, c[2], d, ax^2+bx[3]
FMul Const1On6 ; sInterp[3], c, d, ax^2+bx[1]
FXCh ; c, sInterp[3], d, ax^2+bx[1]
FAddP ST(3), ST ; sInterp[2], d, ax^2+bx+c[3]
FXCh ; d, sInterp[2], ax^2+bx+c[3]
FMul Const1On6 ; sd[3], sInterp[1], ax^2+bx+c[2]
FXCh ; sInterp[1], sd[3], ax^2+bx+c[2]
FMulP ST(2), ST
Pop DS
Assume DS:Nothing
Mov EDX, [DS:0]
FAdd ; SampleValue (16 bit value)
FLd DWord Ptr [DS:0] ; x(k-1), x(k)
FMul DWord Ptr [DS:14h] ; b.x(k-1), x(k)
FLd DWord Ptr [DS:4] ; x(k-2), b.x(k-1), x(k)
FMul DWord Ptr [DS:18h] ; c.x(k-2), b.x(k-1), x(k)
FXCh ST(2) ; x(k), b.x(k-1), c.x(k-2)
FMul DWord Ptr [DS:10h] ; a.x(k), b.x(k-1), c.x(k-2)
FXCh ST(2) ; c.x(k-2), b.x(k-1), a.x(k)
FAdd
Mov EDX, [DS:0]
FAdd
Mov [DS:4], EDX
FSt DWord Ptr [DS:0]
FIStP CS:SampleValue
ELSE
FAdd ST, ST(2) ; x+3v, 3w, 3v, u, Interp
FLd ST(1) ; 3w, x+3v, 3w, 3v, u, Interp
FSub ST, ST(4) ; 3w-u, x+3v, 3w, 3v, u, Interp
FAdd ST, ST ; 6w-2u, x+3v, 3w, 3v, u, Interp
FSub ST, ST(1) ; "c", x+3v, 3w, 3v, u, Interp
FXCh ; x+3v, "c", 3w, 3v, u, Interp
FSub ST, ST(2) ; x+3v-3w, "c", 3w, 3v, u, Interp
FSub ST, ST(4) ; "a", "c", 3w, 3v, u, Interp
FMul ST, ST(5) ; "ax", "c", 3w, 3v, u, Interp
FXCh ST(3) ; 3v, "c", 3w, "ax", u, Interp
FAdd ST, ST ; 6v, "c", 3w, "ax", u, Interp
FXCh ST(4) ; u, "c", 3w, "ax", 6v, Interp
FMul Const3 ; 3u, "c", 3w, "ax", 6v, Interp
FSub ST, ST(4) ; 3u-6v, "c", 3w, "ax", 6v, Interp
FAdd ST, ST(2) ; "b", "c", 3w, "ax", 6v, Interp
FAdd ST, ST(3) ; "ax+b", "c", 3w, "ax", 6v, Interp
FMul ST, ST(5) ; "ax^2+bx", "c", 3w, "ax", 6v, Interp
FAdd ; ax^2+bx+c, 3w, "ax", 6v, Interp
FMulP ST(4), ST ; 3w, "ax", 6v, ax^3+bx^2+cx
FComPP ; 6v, ax^3+bx^2+cx
FAdd ; SampleValue
FMul Const1On6
Pop DS
Assume DS:Nothing
FMul DWord Ptr [DS:10h]
FLd DWord Ptr [DS:0] ; x(k-1), x(k)
FMul DWord Ptr [DS:14h] ; b.x(k-1), x(k)
FLd DWord Ptr [DS:4] ; x(k-2), b.x(k-1), x(k)
FMul DWord Ptr [DS:18h] ; c.x(k-2), b.x(k-1), x(k)
FAdd
Mov EDX, [DS:0]
FAdd
Mov [DS:4], EDX
FSt DWord Ptr [DS:0]
FIStP SampleValue
ENDIF
Pop EDX
IF FILTERCLIPPINGTYPENONE
ELSE
Mov EAX, [DS:0]
And EAX, 7FFFFFFFh
Cmp EAX, MAXFILTERVALUE
JBE X
IF FILTERCLIPPINGTYPECOMPRESSOR
Mov EBX, [DS:0]
FLd CS:Const22713_0
FLd DWord Ptr [DS:0]
FAbs
FMul CS:Const1On32768
FYL2X ; ST = ln(x/65536) / ln(2) * 65536 * ln(2)
FAdd CS:Const32768
SAR EBX, 31
FIStP SampleValue
Xor SampleValue, EBX
Sub SampleValue, EBX
Comment ~
Mov EBX, [DS:0]
FLd DWord Ptr [DS:0]
FAbs
FSub [CS:Const65536]
FMul [CS:ConstLimiter]
FAdd [CS:Const65536]
SAR EBX, 31
FIStP SampleValue
XOr SampleValue, EBX
Sub SampleValue, EBX
; FILD SampleValue
; FStP DWord Ptr [DS:0]
~
ENDIF
IF FILTERCLIPPINGTYPELIMIT
Mov EBX, [DS:0]
Mov EAX, MAXFILTERVALUE
And EBX, 80000000h
Or EAX, EBX
Mov [DS:0], EAX
ENDIF
X:
ENDIF
Mov EBX, SampleValue
ENDIF
IF QUADRATICINTERPOLATION
Push ECX
Push EDX
Push EBP
MovSX EDX, Word Ptr [ES:EDI+EDI+4] ; v
MovSX EBX, Word Ptr [ES:EDI+EDI] ; t
MovSX EAX, Word Ptr [ES:EDI+EDI+2] ; u
ShR ECX, 3 ; 0.13
LEA EBP, [EBX+EDX]
SAR EBP, 1
Sub EBP, EAX ; (v+t)/2 - u
IMul EBP, ECX ; 16.13
SAR EBP, 14 ; 15.0
Add EDX, EBX ; EDX = v+t
Add EBP, EAX ; EBP = ax+2u
LEA EDX, [EDX+EBX*2]
SAR EDX, 2 ; EDX = (3t+v)/2
Sub EBP, EDX ; ax + b, 15 form
IMul EBP, ECX ; ax^2+bx in 15.13 form
SAR EBP, 12 ; ax^2+bx in 16.0 form
Add EBX, EBP
Pop EBP
Pop EDX
Pop ECX
ENDIF
IF LINEARINTERPOLATION
MovSX EBX, Word Ptr [ES:EDI+EDI+2]
MovSX EAX, Word Ptr [ES:EDI+EDI]
Sub EBX, EAX
SAR EBX, 1
IMul EBX, ECX
SAR EBX, 15
Add EBX, EAX
ENDIF
IF POINTSAMPLED
MovSX EBX, Word Ptr [ES:EDI+EDI]
ENDIF
EndM
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Proc Mix32Stereo8Bit ; Given DS:SI = buffer
; Given ES:DI = sample
; AX = bytes to mix
; CX = error
; DX = delta offset
; BP = delta error
ShL AX, 3
Add AX, SI
Mov Word Ptr [CS:M32S8BEND], AX
Mix32Stereo8Bit1:
Get8BitWaveForm
M32S8BLVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI], EAX
Mov CS:LastLeftValue, EAX
M32S8BRVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI+4], EAX
Mov CS:LastRightValue, EAX
Add CX, BP
AdC DI, DX
Add SI, 8
M32S8BLVSet EQU $+2
Mov EAX, 12345678h ; Destination volume left
M32S8BRVSet EQU $+2
Mov EBX, 12345678h ; Destination volume right
Sub EAX, DWord Ptr [CS:M32S8BLVC] ; Delta
Sub EBX, DWord Ptr [CS:M32S8BRVC]
SAR EAX, RAMPSPEED
SAR EBX, RAMPSPEED
Add DWord Ptr [CS:M32S8BLVC], EAX
Add DWord Ptr [CS:M32S8BRVC], EBX
M32S8BNoRightRamp:
M32S8BEND EQU $+2
Cmp SI, 1234h
JNE Mix32Stereo8Bit1
Ret
EndP Mix32Stereo8Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc PreM32SMix8Bit
IF VOLUMERAMP
PushAD
Xor EAX, EAX
Xor EBX, EBX
Xor EDX, EDX
Xor EBP, EBP
Xor EDI, EDI
Mov AX, Word Ptr [SI+0Ch] ; New right volume
Mov BX, Word Ptr [SI+0Eh] ; New left volume
Mov DX, Word Ptr [SI+1Ch] ; Old right volume
Mov BP, Word Ptr [SI+1Eh] ; Old left volume
Mov DWord Ptr [CS:M32S8BRVC], EDX
Mov DWord Ptr [CS:M32S8BLVC], EBP
; Compensate for upwards ramp.
Cmp AX, DX
JB PreM32Mix8BitNoRightCompensate
Add AX, RAMPCOMPENSATE
PreM32Mix8BitNoRightCompensate:
Cmp BX, BP
JB PreM32Mix8BitNoLeftCompensate
Add BX, RAMPCOMPENSATE
PreM32Mix8BitNoLeftCompensate:
Mov DWord Ptr [CS:M32S8BRVSet], EAX
Mov DWord Ptr [CS:M32S8BLVSet], EBX
; Now to figure out exact final volumes
Push SI
Mov CX, CS:RealBytesToMix
PreM32Mix8Bit1:
Mov ESI, EAX ; Set values
Mov EDI, EBX
Sub ESI, EDX ; Current values
Sub EDI, EBP
SAR ESI, RAMPSPEED
SAR EDI, RAMPSPEED
Add EDX, ESI
Add EBP, EDI
Loop PreM32Mix8Bit1
Pop SI
Mov Word Ptr [SI+1Ch], DX
Mov Word Ptr [SI+1Eh], BP
PopAD
Ret
ELSE
Xor EAX, EAX
Xor EBX, EBX
Mov AX, Word Ptr [SI+0Ch]
Mov BX, Word Ptr [SI+0Eh]
Mov DWord Ptr [CS:M32S8BRVC], EAX
Mov DWord Ptr [CS:M32S8BLVC], EBX
Mov DWord Ptr [CS:M32S8BRVSet], EAX
Mov DWord Ptr [CS:M32S8BLVSet], EBX
Mov [SI+1Ch], AX
Mov [SI+1Eh], BX
Ret
ENDIF
EndP PreM32SMix8Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc Mix32Surround8Bit ; Given DS:SI = buffer
; Given ES:DI = sample
; AX = bytes to mix
; CX = error
; DX = delta offset
; BP = delta error
ShL AX, 3
Add AX, SI
Mov Word Ptr [CS:M32U8BEND], AX
Mix32Surround8Bit1:
Get8BitWaveForm
M32U8BLVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI], EAX
Mov CS:LastLeftValue, EAX
Neg EAX
M32U8BLVSet EQU $+2
Mov EBX, 12345678h
Sub [SI+4], EAX
Sub EBX, DWord Ptr [CS:M32U8BLVC]
SAR EBX, RAMPSPEED
Add SI, 8
Add CX, BP
AdC DI, DX
Add DWord Ptr [CS:M32U8BLVC], EBX
M32U8BEND EQU $+2
Cmp SI, 1234h
JNE Mix32Surround8Bit1
Mov EAX, CS:LastLeftValue
Neg EAX
Mov CS:LastRightValue, EAX
Ret
EndP Mix32Surround8Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc PreM32UMix8Bit
IF VOLUMERAMP
Xor EAX, EAX
Xor EBX, EBX
Mov AX, Word Ptr [SI+1Eh] ; Old
Mov BX, Word Ptr [SI+0Eh] ; New
Mov DWord Ptr [CS:M32U8BLVC], EAX
; Compensate for upwards ramp.
Cmp BX, AX
JB PreM32MixU8Bit2
Add BX, RAMPCOMPENSATE
PreM32MixU8Bit2:
Mov DWord Ptr [CS:M32U8BLVSet], EBX
Mov CX, CS:RealBytesToMix
PreM32UMix8Bit1:
Mov EDX, EBX
Sub EDX, EAX
SAR EDX, RAMPSPEED
Add EAX, EDX
Loop PreM32UMix8Bit1
Mov [SI+1Eh], AX
Ret
ELSE
Xor EAX, EAX
Mov AX, Word Ptr [SI+0Eh]
Mov DWord Ptr [CS:M32U8BLVC], EAX
Mov DWord Ptr [CS:M32U8BLVSet], EAX
Mov [SI+1Eh], AX
Ret
ENDIF
EndP PreM32UMix8Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc Mix32Stereo16Bit
ShL AX, 3
Add AX, SI
Mov Word Ptr [CS:M32S16BEND], AX
Mix32Stereo16Bit1:
Get16BitWaveform
M32S16BLVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI], EAX
Mov CS:LastLeftValue, EAX
M32S16BRVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI+4], EAX
Mov CS:LastRightValue, EAX
Add CX, BP
AdC DI, DX
M32S16BLVSet EQU $+2
Mov EAX, 12345678h ; Destination volume left
M32S16BRVSet EQU $+2
Mov EBX, 12345678h ; Destination volume right
Sub EAX, DWord Ptr [CS:M32S16BLVC] ; Delta
Sub EBX, DWord Ptr [CS:M32S16BRVC]
SAR EAX, RAMPSPEED
SAR EBX, RAMPSPEED
Add DWord Ptr [CS:M32S16BLVC], EAX
Add DWord Ptr [CS:M32S16BRVC], EBX
Add SI, 8
M32S16BEND EQU $+2
Cmp SI, 1234h
JNE Mix32Stereo16Bit1
Ret
EndP Mix32Stereo16Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc PreM32SMix16Bit
IF VOLUMERAMP
PushAD
Xor EAX, EAX
Xor EBX, EBX
Xor EDX, EDX
Xor EBP, EBP
Xor EDI, EDI
Mov AX, Word Ptr [SI+0Ch] ; New right volume
Mov BX, Word Ptr [SI+0Eh] ; New left volume
Mov DX, Word Ptr [SI+1Ch] ; Old right volume
Mov BP, Word Ptr [SI+1Eh] ; Old left volume
Mov DWord Ptr [CS:M32S16BRVC], EDX
Mov DWord Ptr [CS:M32S16BLVC], EBP
; Compensate for upwards ramp.
Cmp AX, DX
JB PreM32Mix16BitNoRightCompensate
Add AX, RAMPCOMPENSATE
PreM32Mix16BitNoRightCompensate:
Cmp BX, BP
JB PreM32Mix16BitNoLeftCompensate
Add BX, RAMPCOMPENSATE
PreM32Mix16BitNoLeftCompensate:
Mov DWord Ptr [CS:M32S16BRVSet], EAX
Mov DWord Ptr [CS:M32S16BLVSet], EBX
; Now to figure out exact final volumes
Push SI
Mov CX, CS:RealBytesToMix
PreM32Mix16Bit1:
Mov ESI, EAX ; Set values
Mov EDI, EBX
Sub ESI, EDX ; Current values
Sub EDI, EBP
SAR ESI, RAMPSPEED
SAR EDI, RAMPSPEED
Add EDX, ESI
Add EBP, EDI
Loop PreM32Mix16Bit1
Pop SI
Mov Word Ptr [SI+1Ch], DX
Mov Word Ptr [SI+1Eh], BP
PopAD
Ret
ELSE
Xor EAX, EAX
Xor EBX, EBX
Mov AX, Word Ptr [SI+0Ch]
Mov BX, Word Ptr [SI+0Eh]
Mov DWord Ptr [CS:M32S16BRVC], EAX
Mov DWord Ptr [CS:M32S16BLVC], EBX
Mov DWord Ptr [CS:M32S16BRVSet], EAX
Mov DWord Ptr [CS:M32S16BLVSet], EBX
Mov [SI+1Ch], AX
Mov [SI+1Eh], BX
Ret
ENDIF
EndP PreM32SMix16Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc Mix32Surround16Bit ; Given DS:SI = buffer
; Given ES:DI = sample
; AX = bytes to mix
; CX = error
; DX = delta offset
; BP = delta error
ShL AX, 3
Add AX, SI
Mov Word Ptr [CS:M32U16BEND], AX
Mix32Surround16Bit1:
Get16BitWaveForm
M32U16BLVC EQU $+3
IMul EAX, EBX, 12345678h
Sub [SI], EAX
M32U16BLVSet EQU $+2
Mov EBX, 12345678h
Neg EAX
Sub EBX, DWord Ptr [CS:M32U16BLVC]
Sub [SI+4], EAX
SAR EBX, RAMPSPEED
Add SI, 8
Add CX, BP
AdC DI, DX
Add DWord Ptr [CS:M32U16BLVC], EBX
M32U16BEND EQU $+2
Cmp SI, 1234h
JNE Mix32Surround16Bit1
Mov CS:LastRightValue, EAX
Neg EAX
Mov CS:LastLeftValue, EAX
Ret
EndP Mix32Surround16Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc PreM32UMix16Bit
IF VOLUMERAMP
Xor EAX, EAX
Xor EBX, EBX
Mov AX, Word Ptr [SI+1Eh]
Mov BX, Word Ptr [SI+0Eh]
Mov DWord Ptr [CS:M32U16BLVC], EAX
; Compensate for upwards ramp.
Cmp BX, AX
JB PreM32MixU16Bit2
Add BX, RAMPCOMPENSATE
PreM32MixU16Bit2:
Mov DWord Ptr [CS:M32U16BLVSet], EBX
Mov CX, CS:RealBytesToMix
PreM32UMix16Bit1:
Mov EDX, EBX
Sub EDX, EAX
SAR EDX, RAMPSPEED
Add EAX, EDX
Loop PreM32UMix16Bit1
Mov [SI+1Eh], AX
Ret
ELSE
Xor EAX, EAX
Mov AX, Word Ptr [SI+0Eh]
Mov DWord Ptr [CS:M32U16BLVC], EAX
Mov DWord Ptr [CS:M32U16BLVSet], EAX
Mov [SI+1Eh], AX
Ret
ENDIF
EndP PreM32UMix16Bit
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
NUMBEROFFILTERBANDS EQU 4
ALIGN 4
LastClickRemovalLeft DD 0
LastClickRemovalRight DD 0
StartingChannelOffset DW 0
FilterParameters DB 64 Dup (7Fh), 64 Dup (0)
FilterValues DD 4*256 Dup (0)
SampleFilterCopyOffset DW 16*64
FreqMultiplier DD 3A9F7867h ; = 1/(2*PI*110.0*2^0.25)
FreqParameterMultiplier DD 0B92AAAAAh ; = -1/(24*256)
FilterFreqValue DW 0
NewControlWord DW 7Fh
include q.inc
LastFilter DD NUMBEROFFILTERBANDS*2 Dup (0) ; 4 stereo values
FilterCoefficients DD NUMBEROFFILTERBANDS*2 Dup (0)
FilterVolumes DD NUMBEROFFILTERBANDS Dup (0)
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc IsSampleMode ; returns zero flag if sample mode.
Push DS
Mov DS, CS:SongDataArea
Test Byte Ptr [DS:2Ch], 4
Pop DS
Ret
EndP IsSampleMode
Assume DS:Nothing
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
Proc M32MixHandler
; Clear output buffer first...
Mov CS:StartingChannelOffset, SI
Push CX
Mov ES, CS:MixSegment
Mov EAX, CS:BytesToMixFractional
Mov CX, CS:BytesToMix
Add CurrentFractional, EAX
AdC CX, 0
Mov CS:RealBytestoMix, CX
; Add CX, CX ; Stereo = 2 * BytesToMix
; Mov DI, 32
; Xor EAX, EAX
; Rep StosD
Pop CX
PushAD
Mov EDX, CS:LastClickRemovalLeft
Mov EBP, CS:LastClickRemovalRight
; Do left first.
Mov SI, 80
Mov CX, CS:RealBytesToMix
ClickRemoval3:
Comment ~
Mov [ES:SI], EDX
Mov [ES:SI+4], EBP
Inc EDX
JS ClickRemoval4
Sub EDX, 2
JGE ClickRemoval4
Inc EDX
ClickRemoval4:
Inc EBP
JS ClickRemoval5
Sub EBP, 2
JGE ClickRemoval5
Inc EBP
ClickRemoval5:
~
Mov EAX, EDX
Mov EBX, EBP
SAR EAX, 12
SAR EBX, 12
Mov [ES:SI], EDX
Mov [ES:SI+4], EBP
Sub EAX, 1
AdC EAX, 1
Sub EBX, 1
AdC EBX, 1
Sub EDX, EAX
Sub EBP, EBX
Add SI, 8
Loop ClickRemoval3
Mov CS:LastClickRemovalLeft, EDX
Mov CS:LastClickRemovalRight, EBP
PopAD
; Check each channel...
; Prepare mixing stuff
; Work backwards
Mov AX, CX
Dec AX
ShL AX, 7
Add SI, AX
M32MixHandler1:
Test Byte Ptr [SI], 1
JZ M32MixHandlerEnd2
Cmp Byte Ptr [SI+36h], 100
JE M32MixHandlerEnd2
Push CX
Mov BP, SI
Sub BP, [CS:StartingChannelOffset] ; BP = SlaveChannel*128
SHR BP, 3 ; BP = SlaveChannel*16
Mov DI, BP
Add BP, Offset FilterValues
Mov CX, [SI]
Test CH, 2
JZ M32MixHandler13
; Note cut.
And Byte Ptr [SI], Not 1 ; Turn off channel
Mov Word Ptr [SI+4Ah], 0
Or CL, 40h
M32MixHandler13:
Test CL, 20h ; New freq?
JZ M32MixHandler3
Mov AX, [SI+10h]
Mov DX, [SI+12h]
Mov BX, MixSpeed
Cmp DX, BX
JAE M32MixHandlerError
Div BX
ShL EAX, 16
Xor AX, AX
Div BX
Mov STEPVALUE, EAX
M32MixHandler3:
Test CH, 1 ; New note?
JZ M32MixHandler12
Xor EAX, EAX
Mov DWord Ptr [SI+1Ch], EAX
Mov DWord Ptr [CS:BP], EAX
Mov DWord Ptr [CS:BP+4], EAX
Mov DWord Ptr [CS:BP+8], 3F800000h
Mov DWord Ptr [CS:BP+0Ch], EAX
M32MixHandler12:
Test CX, 8440h ; New volume, loop or pan?
JZ M32MixHandler4
Mov AL, [SI+3Ah]
Test AL, AL
JNS M32MixHandlerFilter1
Mov BL, [SI+3Fh]
Jmp M32MixHandlerFilter2
M32MixHandlerFilter1:
Mov DI, AX
And DI, 63
Add DI, Offset FilterParameters
Mov AL, [CS:DI]
Mov BL, [CS:DI+64]
Mov [SI+5Bh], AL
Mov [SI+3Fh], BL
M32MixHandlerFilter2:
Mov AL, [SI+3Eh]
Mul Byte Ptr [SI+5Bh]
Mov CS:FilterFreqValue, AX
ShR AX, 8
Mov AH, BL
AdC AX, 0
Cmp AX, 7Fh
JE M32MixHandlerNoFilter
And BX, 0FFh
ShL BX, 2
FNInit
FLdCW [CS:NewControlWord]
FILD [CS:FilterFreqValue] ; 0->127*256
FMul [CS:FreqParameterMultiplier] ; -i/(24*256)
FLd ST
FRndInt
FSub ST(1), ST
FXCh
F2XM1
FLd1
FAdd
FScale ; = 2^(i/24*256)
FMul [CS:FreqMultiplier] ; = r
FLd ST ; r, r
FMul ST(1), ST ; r, r^2
FLd [CS:QualityFactorTable+BX] ; 2d, r, r^2
FMul ST(1), ST ; 2d, 2dr, r^2
FLd1 ; 1, 2d, 2dr, r^2
FSubP ST(1), ST ; 2d-1, 2dr, r^2
FAdd
FLd1 ; 1, d, e
FAdd ST, ST(1)
FAdd ST, ST(2) ; 1+d+e, d, e
FLd1 ; 1, 1+d+e, d, e
FDivRP ST(1), ST ; 1/(1+d+e), d, e
FSt DWord Ptr [CS:BP+8]
FXCh ; d, 1/(1+d+e), e
FAdd ST, ST(2)
FAddP ST(2), ST ; 1/(1+d+e), d+2e
FMul
FStP DWord Ptr [CS:BP+0Ch]
FStP ST
M32MixHandlerNoFilter:
IF REGISTERED
Test CH, 8
JNZ M32MixHandler7
Cmp CS:Stereo, 0
JE M32MixHandler6
Mov AL, [SI+37h] ; Final pan
Cmp AL, 100
JE M32MixHandler6
Mul Byte Ptr MixVolume
Mul Word Ptr [SI+4Ah]
SHRD AX, DX, 14
Mov [SI+0Ch], AX ; Store into right volume
Mov AL, 64 ; Do left volume
Sub AL, [SI+37h] ; AL = 64-FinalPan
Mul Byte Ptr MixVolume
Mul Word Ptr [SI+4Ah] ; Final volume
SHRD AX, DX, 14
Mov [SI+0Eh], AX
; Now to decide on mixing method
Cmp DWord Ptr [SI+0Ch], 0
JNE M32MixHandler5
ELSE
Test CH, 8
JZ M32MixHandler6
ENDIF
M32MixHandler7:
; Zero volume
Xor EAX, EAX
Mov [SI+0Ch], EAX
Cmp [SI+1Ch], EAX ; Last volumes = 0?
JE M32MixHandler8
M32MixHandler5: ; Other.. (ie. panned)
Mov AX, 30
Jmp M32MixHandler8
M32MixHandler6: ; Surround sound
Mov AX, [SI+4Ah]
Mul MixVolume
IF REGISTERED
ShRD AX, DX, 8
Cmp CS:Stereo, 0
JE M32MixHandlerHalfStereoVolume
ShR AX, 1
M32MixHandlerHalfStereoVolume:
ELSE
ShRD AX, DX, 9
ENDIF
Mov [SI+0Ch], AX
Mov [SI+0Eh], AX
Test AX, AX
JNZ M32MixHandlerSurround1
Cmp DWord Ptr [SI+1Ch], 0
JE M32MixHandler7
M32MixHandlerSurround1:
Mov AX, 60
M32MixHandler8:
Mov BL, [SI+0Ah]
Test Byte Ptr [SI+18h], 2
JZ M32MixHandler9
Add AX, 90
M32MixHandler9:
Cmp BL, 8
JB M32MixHandler11 ; No loop
JE M32MixHandler10
Add AX, 10
M32MixHandler10:
Add AX, 10
M32MixHandler11:
Add AX, Offset WAVMixingTable
Mov [SI+8], AX ; Offset...
M32MixHandler4:
; Mixing routine call...
Mov BX, [SI+8] ; BX = offset into
Mov EAX, [CS:BX+2]
Mov DWord Ptr PreMixFunction, EAX
Mov EAX, [CS:BX+6]
Mov DWord Ptr MixFunctionSeparateBackwards, EAX
Mov AX, RealBytesToMix
Mov MixBlockSize, AX
Mov MixBufferOffset, 80
Mov EAX, CURRENTPOSITION
Mov OLDPOSITION, EAX
Cmp CS:StartNoRamp, 0
JE NoStartRamp
Test CH, 1
JZ NoStartRamp
Cmp DWord Ptr [SI+4Ch], 0
JNE NoStartRamp
Mov EAX, [SI+0Ch]
Mov [SI+1Ch], EAX
NoStartRamp:
Mov ES, CS:MixSegment ; Get filter data
Mov EAX, [CS:BP] ; Last sample 1
Mov EDX, [CS:BP+4] ; Last sample 2
Mov [ES:0], EAX
Mov [ES:4], EDX
Mov EAX, [CS:BP+8] ; Filtera
Mov EDX, [CS:BP+0Ch] ; Filterb
Mov [ES:10h], EAX
Mov [ES:14h], EDX
FLd1
FSub DWord Ptr [ES:10h]
FSub DWord Ptr [ES:14h]
FStP DWord Ptr [ES:18h] ; Filterc
Push BP
Call Word Ptr [CS:BX]
Pop BP
Mov ES, CS:MixSegment ; Store filter data
Mov EAX, [ES:0]
Mov EDX, [ES:4]
Mov [CS:BP], EAX
Mov [CS:BP+4], EDX
And Word Ptr [SI], 0111100010001101b
Call IsSampleMode
JNE M32MixHandlerEnd
Mov [CS:BP+16*64], EAX
Mov [CS:BP+16*64+4], EDX
Mov EAX, [CS:BP+8]
Mov EDX, [CS:BP+0Ch]
Mov [CS:BP+16*64+8], EAX
Mov [CS:BP+16*64+0Ch], EDX
Jmp M32MixHandlerEnd
M32MixHandlerError:
Mov Word Ptr [SI], 200h
Test Byte Ptr [SI+3Ah], 80h
JNZ M32MixHandlerEnd
Mov BX, [SI+38h]
And Byte Ptr [BX], Not 4 ; Turn off channel
M32MixHandlerEnd:
Pop CX
M32MixHandlerEnd2:
Sub SI, 128
Dec CX
JNZ M32MixHandler1
Push CS
Pop DS
Assume DS:Driver
Xor DI, DI
Mov SI, Offset LastFilter
Mov CX, 80/4
Mov ES, MixSegment
Rep MovsD
; Now do filtering.
FNInit
Mov CX, RealBytesToMix
Push ES
Pop DS
Assume DS:Nothing
Mov SI, 80
OutputFilter1:
FILD DWord Ptr [SI] ; Left sample
FILD DWord Ptr [SI+4] ; R, L
FLd DWord Ptr [DS:20h] ; LB, R, L
FMul ST, ST(2) ; L.LB, R, L
FLd DWord Ptr [DS:20h] ; LB, L.LB, R, L
FMul ST, ST(2) ; R.LB, L.LB, R, L
FLd DWord Ptr [DS:0] ; OL, R.LB, L.LB, R, L
FMul DWord Ptr [DS:24h] ; OL.LB, R.LB, L.LB, R, L
FLd DWord Ptr [DS:4] ; OR, OL.LB, R.LB, L.LB, R, L
FMul DWord Ptr [DS:24h] ; OR.LB, OL.LB, R.LB, L.LB, R, L
FXCh ; OL.LB, OR.LB, R.LB, L.LB, R, L
FAddP ST(3), ST
FAdd ; RLB, LLB, R, L
FLd DWord Ptr [DS:28h] ; MB, RLB, LLB, R, L
FMul ST, ST(4) ; L.MB, RLB, LLB, R, L
FLd DWord Ptr [DS:28h] ; MB, L.MB, RLB, LLB, R, L
FMul ST, ST(4) ; R.MB, L.MB, RLB, LLB, R, L
FLd DWord Ptr [DS:8] ; OL, R.MB, L.MB, RLB, LLB, R, L
FMul DWord Ptr [DS:2Ch] ; OL.MB, R.MB, L.MB, RLB, LLB, R, L
FLd DWord Ptr [DS:0Ch] ; OR, OL.MB, R.MB, L.MB, RLB, LLB, R, L
FMul DWord Ptr [DS:2Ch] ; OR.MB, OL.MB, R.MB, L.MB, RLB, LLB, R, L
FXCh ; OL.MB, OR.MB, R.MB, L.MB, RLB, LLB, R, L
FAddP ST(3), ST
FAdd ; RMB, LMB, RLB, LLB, R, L
FXCh ST(3) ; LLB, LMB, RLB, RMB, R, L
FStP DWord Ptr [DS:0]
FStP DWord Ptr [DS:8]
FStP DWord Ptr [DS:4]
FStP DWord Ptr [DS:0Ch]
FLd DWord Ptr [DS:30h]
FMul ST, ST(2)
FLd DWord Ptr [DS:30h]
FMul ST, ST(2)
FLd DWord Ptr [DS:10h]
FMul DWord Ptr [DS:34h]
FLd DWord Ptr [DS:14h]
FMul DWord Ptr [DS:34h]
FXCh
FAddP ST(3), ST
FAdd
FLd DWord Ptr [DS:38h]
FMul ST, ST(4)
FLd DWord Ptr [DS:38h]
FMul ST, ST(4)
FLd DWord Ptr [DS:18h]
FMul DWord Ptr [DS:3Ch]
FLd DWord Ptr [DS:1Ch]
FMul DWord Ptr [DS:3Ch]
FXCh
FAddP ST(3), ST
FAdd
FXCh ST(3)
FStP DWord Ptr [DS:10h]
FStP DWord Ptr [DS:18h]
FStP DWord Ptr [DS:14h]
FStP DWord Ptr [DS:1Ch] ; R, L
; For each one, output value += ((band value) - (previous band value)) * Volume
FLd DWord Ptr [DS:18h]
FSub DWord Ptr [DS:10h] ; L4, R, L
FLd DWord Ptr [DS:1Ch]
FSub DWord Ptr [DS:14h] ; R4, L4, R, L
FLd DWord Ptr [DS:10h]
FSub DWord Ptr [DS:8]
FLd DWord Ptr [DS:14h]
FSub DWord Ptr [DS:0Ch] ; R3, L3, R4, L4, R, L
FLd DWord Ptr [DS:8]
FSub DWord Ptr [DS:0]
FLd DWord Ptr [DS:0Ch]
FSub DWord Ptr [DS:4] ; R2, L2, R3, L3, R4, L4, R, L
FXCh ST(5) ; L4, L2, R3, L3, R4, R2, R, L
FMul DWord Ptr [DS:4Ch] ; L4V, L2, R3, L3, R4, R2, R, L
FXCh ST(4) ; R4, L2, R3, L3, L4V, R2, R, L
FMul DWord Ptr [DS:4Ch] ; R4V, L2, R3, L3, L4V, R2, R, L
FXCh ST(3) ; L3, L2, R3, R4V, L4V, R2, R, L
FMul DWord Ptr [DS:48h] ; L3V, L2, R3, R4V, L4V, R2, R, L
FXCh ST(2) ; R3, L2, L3V, R4V, L4V, R2, R, L
FMul DWord Ptr [DS:48h] ; R3V, L2, L3V, R4V, L4V, R2, R, L
FXCh ; L2, R3V, L3V, R4V, L4V, R2, R, L
FMul DWord Ptr [DS:44h] ; L2V, R3V, L3V, R4V, L4V, R2, R, L
FXCh ST(5) ; R2, R3V, L3V, R4V, L4V, L2V, R, L
FMul DWord Ptr [DS:44h] ; R2V, R3V, L3V, R4V, L4V, L2V, R, L
FXCh ST(4) ; L4V, R3V, L3V, R4V, R2V, L2V, R, L
FAddP ST(7), ST ; R3V, L3V, R4V, R2V, L2V, R, L
FAddP ST(5), ST ; L3V, R4V, R2V, L2V, R, L
FAddP ST(3), ST
FAdd
FLd DWord Ptr [DS:0]
FMul DWord Ptr [DS:40h] ; L1V, RV, LV, R, L
FLd DWord Ptr [DS:4] ;
FMul DWord Ptr [DS:40h] ; R1V, L1V, RV, LV, R, L
FXCh ST(2) ; RV, L1V, R1V, LV, R, L
FAddP ST(4), ST ; L1V, R1V, LV, R, L
FAddP ST(4), ST ; R1V, LV, R, L
FAddP ST(2), ST
FAddP ST(2), ST
FIStP DWord Ptr [SI+4]
FIStP DWord Ptr [SI]
Add SI, 8
Dec CX
JNZ OutputFilter1
; Transfer contents out
Push CS
Pop ES
Mov DI, Offset LastFilter
Xor SI, SI
Mov CX, 32/4
Rep MovsD
; Finished output filtering!
Ret
EndP M32MixHandler
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