Overview

Simulates loading of biquad fract32 filters

Discussion

This module is used for CPU load testing purposes and implements a large number of cascade Biquad fract32 filters. At instantiation time, you specify MAXSTAGES - the maximum number of filter stages that you would like to simulate. Then at run-time you can vary the number of filters running from 1 to MAXSTAGES. This makes the CPU work harder since more filter stages are running. Internally, the module uses a BiquadCascadeFract32 module to implement the filtering.

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

Type Definition

typedef struct _ModuleBiquadLoadingFract32
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    INT32 maxStages;                              // Maximum Biquad fract32 stages that can be run
    INT32 numStages;                              // Number of Biquad fract32 stages currently running
    awe_modBiquadCascadeFract32Instance *filt; // Cascade of second order Biquad filters
} ModuleBiquadLoadingFract32Class;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
maxStages	int	const	0	100	1:100
numStages	int	parameter	0	1	1:100

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: biquad_loading_fract32_module.m

 M = biquad_loading_fract32_module(NAME, MAXSTAGES)
 Module which simulates the loading of N series biquad fract32 stages.  The
 module is used for profiling and demonstrations of the computational
 capabilities of processors.  Arguments:
    NAME - name of the module.
    MAXSTAGES - maximum stages that will be tried (this is used for
        memory allocation and is set to 100 by default).

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(8.D.2.2 ) BiquadLoadingFract32

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