AllocCxIIRFilterStatePtr
Advanced Analysis Library Only
CxIIRFilterStatePtr AllocCxIIRFilterStatePtr (int type, int order);
Purpose
Allocates and initializes the filterState structure. AllocCxIIRFilterStatePtr returns a pointer to the internal filter state for use with the complex IIR cascade filter coefficient design calls.
You input the type of the filter, such as lowpass, highpass, bandpass, or bandstop, and the order. AllocCxIIRFilterStatePtr allocates the internal filter state array.
Parameters
| Input | ||
| Name | Type | Description |
| type | int | Controls the filter type of IIR filter coefficients.
|
| order | int | The order of the IIR filter. The default value is 3. |
Return Value
| Name | Type | Description |
| filterInformation | CxIIRFilterStatePtr | Pointer to the complex filter state structure that contains the internal filter information. Call this function to allocate filterInformation before you call one of the complex cascade IIR filter design functions. When an error occurs, filterInformation is zero. The definition of the filter structure is as follows: typedef struct { int numStates; /* number of internal states */ |
Additional Information
Library: Advanced Analysis Library
Include file: analysis.h
LabWindows/CVI compatibility: LabWindows/CVI 2012 and later