2023-03-09 21:35:56 -08:00
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FourierBufferStart DW 0
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FourierBufferInputStart DW 0
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FourierBufferInputFractional DW 0
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FourierBufferStepOffset DW 1
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FourierBufferStepFractional DW 0
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;<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>
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Proc UpdateFourierBuffer
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PushAD
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Push DS
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Push ES
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Push CS
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Pop DS
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Assume DS:Driver
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Xor EBX, EBX
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Xor ESI, ESI
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Mov BX, MixTransferOffset
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Mov DI, FourierBufferStart
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ShR BX, 3
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Mov CX, BytesToMix
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Mov SI, FourierBufferInputStart
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Add SI, BX
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Add CX, BX
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Mov BP, FourierBufferInputFractional
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Mov DX, FourierBufferStepOffset
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Mov BX, FourierBufferStepFractional
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Mov ES, FourierSegment
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Mov DS, MixSegment
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Assume DS:Nothing
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UpdateFourierBuffer1:
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Mov EAX, [ESI*8]
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Add EAX, [ESI*8+4]
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SAR EAX, 13
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Cmp EAX, 7FFFh
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JG UpdateFourierBuffer3
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Cmp EAX, -8000h
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JL UpdateFourierBuffer4
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UpdateFourierBuffer2:
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StosW
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Add BP, BX
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AdC SI, DX
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And DI, (FOURIERBUFFERLENGTH*2)-1
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; Cmp past end of buffer?
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Cmp SI, CX
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JB UpdateFourierBuffer1
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Sub SI, CX
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Mov FourierBufferStart, DI
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Mov FourierBufferInputFractional, BP
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Mov FourierBufferInputStart, SI
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Pop ES
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Pop DS
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PopAD
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Ret
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UpdateFourierBuffer3:
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Mov AX, 7FFFh
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Jmp UpdateFourierBuffer2
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UpdateFourierBuffer4:
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Mov AX, 8000h
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Jmp UpdateFourierBuffer2
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EndP UpdateFourierBuffer
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;<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>
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