Overview
16-bit version of Sparse FIR filter which works together with the DelayStateWriter16 module
Discussion
This module implements a 16-bit version of sparse FIR filter which is also known as a tapped delay line. This module stores only the coefficients and delay times and works in conjunction with an upstram delay_state_writer16_module.m. The delay_state_writer16_module.m holds the state variables and can be shared by multiple FIRSpareReaderModules.
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The module only outputs a mono channel of data.
Type Definition
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typedef struct _ModuleFIRSparseReaderFract16
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
INT32 numTaps; // Number of non-zero coefficients (taps) in the filter
INT32 postShift; // Number of bits to shift
INT32 dswObjectID; // Object ID of the upstream DelayStateWriter module
INT32* tapDelay; // Current delay per tap
INT32* tapDelayTarget; // Current delay per tap
FLOAT32* tapCoeffs; // Coefficient applied to each tap output
fract32* tapCoeffsFract16; // Fract16 coefficient applied to each tap output
void * dswObjectPtr; // Points to the upstream DelayStateWriter module
} ModuleFIRSparseReaderFract16Class; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
numTaps | int | const | 0 | 20 | Unrestricted | |
postShift | int | derived | 1 | 1 | Unrestricted | |
dswObjectID | int | state | 1 | -1 | Unrestricted | |
tapDelay | int* | parameter | 0 | [20 x 1] | Unrestricted | samples |
tapDelayTarget | int* | state | 0 | [21 x 1] | Unrestricted | samples |
tapCoeffs | float* | parameter | 0 | [20 x 1] | Unrestricted | |
tapCoeffsFract16 | fract32* | derived | 0 | [20 x 1] | Unrestricted | |
dswObjectPtr | void * | state | 1 | Unrestricted |
Pins
Input Pins
Name: ptr
Description: Pointer to the DelayStateWriter16 instance structure
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Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: audio output
Data type: fract32
MATLAB Usage
File Name: fir_sparse_reader_fract16_module.m
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