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(8.D.1.2) BiquadLoadingFract32

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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