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Example 3: FilterSignal_FloatOut()

include c:\dsp_1for2\dsp_1for2.inc      ;prototypes,  datatypes and structures definitions
includelib c:\dsp_1for2\dsp_1for2.lib      ;import library

N     equ     256

.data?

SignalIn  SIGNAL  N dup(?) ;Input signal, array of N SIGNAL points

Filter    COMPLEX N/2+1 dup(?) ;filter freq response
SignalOut FSIGNAL N dup (?);Output signal, array of N FSIGNAL points

DspStruct1 DSPSTRUCT <> ;uninitialized DSPSTRUCT structure
.
.

.code
.
.

;The following is in the window procedure:
;----------------------------------------

.if uMsg==WM_CREATE ;initialization

    invoke NewDSP,N,addr dspstruct1,2 ;allocate 2     computation blocks
;here: fill the input signal (SignalIn) with test values
;and fill filter frequency response
.

.elseif uMsg==WM_COMMAND ;menu
   

    mov eax,wParam ;as any other program

    .if ax==IDM_FILTER_SIGNAL ;user chooses to filter the     signal

        invoke FilterSignal_FloatOut,addr SignalIn,addr Filter,addr SignalOut,DspStruct1
     ;Note that here we passed the whole DSPSTRUCT structure
.

.
    .endif ;menu

.elseif uMsg==WM_DESTROY ;clean up

    invoke DeleteDSP,addr dspstruct1

.
.

.endif ;uMsg
 

.
.

end

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