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dsp-paw/gui/examples/1_convolve_simple.cpp

31 lines
820 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.
*/
Sample* process_data(Samples samples)
{
// Define our output buffer.
static Samples buffer;
// Define our filter
constexpr unsigned int filter_size = 3;
float filter[filter_size] = {
0.3333, 0.3333, 0.3333
};
// Begin convolving:
// SIZE is the size of the sample buffer.
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;
}