Overview

Simulates loading of fir fract32 filter

Discussion

This module is used for CPU load testing purposes and implements a large number of fixed point FIR filter taps. At instantiation time, you specify MAXNUMTAPS - the maximum number of filter taps that you would like to simulate. Then at run-time you can vary the number of filter taps running from 1 to MAXNUMTAPS. This makes the CPU work harder since more filter taps are running. Internally, the module uses a fract32 FIR module to implement the filtering.

Note that if the filter is connected to a multichannel input, then the module implements numChannels * numTaps filters. That is, the number of filters is scaled by the number of channels processed.

Type Definition

typedef struct _ModuleFIRLoadingFract32
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    INT32 maxTaps;                                // Maximum FIR filter taps that can be run
    INT32 numTaps;                                // Number of FIR filter taps currently running
    awe_modFIRFract32Instance *filt; // FIR fract32 filter
} ModuleFIRLoadingFract32Class;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
maxTaps	int	const	0	1000	1:1000
numTaps	int	parameter	0	1	1:1000

Pins

Input Pins

Name: in

Description: Audio Input

Data type: fract32

Channel range: Unrestricted

Block size range: Unrestricted

Sample rate range: Unrestricted

Complex support: Real

Output Pins

Name: out

Description: Audio output

Data type: fract32

MATLAB Usage

File Name: fir_loading_fract32_module.m

 M = fir_loading_fract32_module(NAME, MAXNUMTAPS)
 Module which simulates the loading of MAXNUMTAPS fir fract32 module.  The
 module is used for profiling and demonstrations of the computational
 capabilities of processors.  Arguments:
    NAME - name of the module.
    MAXNUMTAPS - maximum taps that will be tried (this is used for
        memory allocation and is set to 10000 by default).