Overview
Windows the signal and accumlates to an internal buffer
Discussion
This module implements windowing and overlapping. The module has an array of window coefficients equal to the input blockSize. The module multiples the window by the input block and accumulates this to an internal state buffer. The state buffer acts as a FIFO. After the accumulation, the last OUTBLOCKSIZE samples are copied to the output wire and the whole state buffer is then shifted and the first OUTBLOCKSIZE samples set to zero.
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The module operates on any number of channels. The module requires that the output blockSize be equal or smaller in length to the input blockSize.
Type Definition
| Code Block |
|---|
typedef struct _ModuleWindowOverlap
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
FLOAT32* window; // Window coefficients
FLOAT32* state; // State variable array
} ModuleWindowOverlapClass; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
window | float* | parameter | 0 | [32 x 1] | Unrestricted | |
state | float* | state | 1 | [32 x 1] | Unrestricted |
Pins
Input Pins
Name: in
Description: audio input
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Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: audio output
Data type: float
MATLAB Usage
File Name: window_overlap_module.m
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