(8.D.1.2) PeakFinder
- Catherine Spain
Overview
Find peaks of input data
Discussion
This module finds a number of peaks per audio block as determined by the value of numPeaks. The module outputs the values of the found peaks and has an optional output pin to output at what index the peaks were found. The module will output peaks in descending order, and ignore nearby values as set by minDistanceSpacing. The output pin will have a block size the size of numPeaks with the same number of channels as the input.
Type Definition
typedef struct _ModulePeakFinder
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
INT32 minDistanceSpacing; // Number of samples to ignore around found peak
INT32* histSkip; // Array indicator that indicies should be skipped when peak searching
} ModulePeakFinderClass;Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
minDistanceSpacing | int | parameter | 0 | 1 | 0:32 | Â |
histSkip | int* | state | 1 | [32 x 1] | Unrestricted | Â |
Pins
Input Pins
Name: in
Description: Input Histogram
Data type: float
Channel range: Unrestricted
Block size range: Unrestricted
Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: Peak Values
Data type: float
MATLAB Usage
File Name: peak_finder_module.m
M = peak_finder_module(NAME)
Creates a peak finder module
Arguments:
NAME - name of the module.
NUMPEAKS - number of peaks to detect per audio block
INDEXPIN - boolean flag if you want an output pin to give you the
index of the peaks detected