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30 lines
863 B
C++
30 lines
863 B
C++
/**
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* 1_convolve_simple.cpp
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* Written by Clyne Sullivan.
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*
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* Computes a convolution in the simplest way possible. While the code is brief, it lacks many
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* possible optimizations. The convolution's result will not fill the output buffer either, as the
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* transient response is not calculated.
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*/
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adcsample_t *process_data(adcsample_t *samples, unsigned int size)
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{
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// Define our output buffer. SIZE is the largest size of the 'samples' buffer.
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static adcsample_t buffer[SIZE];
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// Define our filter
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constexpr unsigned int filter_size = 3;
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float filter[filter_size] = {
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0.3333, 0.3333, 0.3333
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};
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// Begin convolving:
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for (int n = 0; n < size - (filter_size - 1); n++) {
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buffer[n] = 0;
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for (int k = 0; k < filter_size; k++)
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buffer[n] += samples[n + k] * filter[k];
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}
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return buffer;
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}
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