(8.D.2.3) Debounce
Overview
Debounces signals
Discussion
Debouncer module which limits how often a signal can change. After a signal changes, the module holds the current block for .waitTime milliseconds before allowing it to change again. If a signal is constantly changing then it will only change every .waitTime milliseconds.
The module supports any data type but only 1 channel of data with any blockSize of samples. When a change is detected, the .count variable counts down from .waitCount down to zero before allowing another change.
At the start of processing, the module samples and holds the first input block. It holds this block for .waitTime until finally resampling the input.
Type Definition
typedef struct _ModuleDebounce
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
FLOAT32 waitTime; // Waiting time before switching
INT32 count; // Counts down to zero
INT32 waitCount; // waitTime as a number of blocks
INT32 firstTime; // Indicates first block processed
INT32* previousBlock; // Held block
} ModuleDebounceClass;
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
waitTime | float | parameter | 0 | 100 | 0:5000 | msec |
count | int | state | 0 | 0 | Unrestricted | Â |
waitCount | int | derived | 1 | 149 | Unrestricted | Â |
firstTime | int | state | 1 | 1 | Unrestricted | Â |
previousBlock | float* | state | 1 | [32 x 1] | Unrestricted | Â |
Pins
Input Pins
Name: in
Description: audio input
Data type: {float, int, fract32}
Channel range: 1
Block size range: Unrestricted
Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: audio output
Data type: {float, int, fract32}
MATLAB Usage
File Name: debounce_module.m
M = debounce_module(NAME)
Audio Weaver module which debounces a signal (reduces the frequency
of changes). Arguments:
NAME - name of the module.
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