WithinRange

Overview

Checks if the input signal levels are within a specified upper and lower range.

Discussion

This module determines if the input signal falls within a specified range. The range is specified by the instance variables .lower and .upper. An input sample falls within the range if (in[i] >= .lower) && (in[i] <= .upper). The instance variable .withinRange is set to 1 if all of the input samples are within range. If one or more input samples are outside of the allowable range, then .withinRange is set to 0.

Type Definition

CODE

typedef struct _ModuleWithinRange
{
    ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
    FLOAT32 lower;                                // Lower edge of the allowable range.
    FLOAT32 upper;                                // Upper edge of the allowable range.
    INT32 withinRange;                            // Equals 1 if all input samples in the block are within range. Otherwise equals 0.
    INT32 outputValue;                            // Specifies the behavior of the output pin.
} ModuleWithinRangeClass;

Variables

Properties

Name	Type	Usage	isHidden	Default value	Range	Units
lower	float	parameter	0	-0.5	-1:1
upper	float	parameter	0	0.5	-1:1
withinRange	int	state	0	0	Unrestricted
outputValue	int	const	0	1	Unrestricted

Pins

Input Pins

Name: in

Description: audio input

Data type: float

Channel range: Unrestricted

Block size range: Unrestricted

Sample rate range: Unrestricted

Complex support: Real

Output Pins

Name: out

Description: Boolean

Data type: int

MATLAB Usage

File Name: within_range_module.m

CODE

 M=within_range_module(NAME, OUTPUTVALUE)
 This module determines if the input signal falls within a specified
 range [.lower .upper]. The module sets an internal Boolean variable
 .withinRange to 1 if (input >= .lower) and (input <= .upper).
 If the input signal is not within the allowable range, then .withinRange
 is set to 0.  
 
 Arguments:
    NAME - name of the module.
    OUTPUTVALUE - specifies the behavior of the module's output pin, if any. 
         OUTPUTVALUE=0, then the module does not have an output pin.
         OUTPUTVALUE=1, then the output pin has size [1x1] and contains 
              the variable .withinRange. 
         OUTPUTVALUE=2, then the output pin is the same dimension as the
              input pin and contains a sample-by-sample Boolean value.  
              By default, OUTPUTVALUE=0.
 
 The variable .withinRange is set based on whether all samples in the
 input pin are within the allowable range.