You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
stmdsp/gui/templates/1_convolve_simple.cpp

30 lines
863 B
C++

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