You've already forked torvalds-GuitarPedal
mirror of
https://github.com/torvalds/GuitarPedal.git
synced 2026-06-20 05:31:55 +00:00
6dcfb9d44d
These scripts generate a few of the constant arrays for my hacky math functions. I could use the math functions from the pico-sdk, and they are certainly going to have higher precision, and might even be faster. But I wanted to see what all the generated code looks like, and at one point I was chasing down some inconsistent timing, so I just decided fairly early on that I will control both the horizontal and the vertical, and the math libraries were part of that. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
26 lines
691 B
Python
Executable File
26 lines
691 B
Python
Executable File
#!/usr/bin/env python3
|
|
import math
|
|
import sys
|
|
from pathlib import Path
|
|
|
|
def generate_eq_w0(output_path, samples_per_sec):
|
|
Path(output_path).parent.mkdir(parents=True, exist_ok=True)
|
|
|
|
with open(output_path, 'w') as f:
|
|
freq = 31.25
|
|
f.write(f"// Precomputed EQ table for {samples_per_sec/1000:.3f}kHz sample rate\n")
|
|
f.write(f"static const struct sincos EQ_W0[] = {{\n")
|
|
for i in range(10):
|
|
phase = freq / samples_per_sec
|
|
angle = phase * math.pi * 2
|
|
sin = math.sin(angle)
|
|
cos = math.cos(angle)
|
|
|
|
f.write(f"\t{{ {sin:.8e}, {cos:.8e} }},\t// {freq}Hz\n")
|
|
|
|
freq = freq * 2
|
|
f.write(f"}};\n")
|
|
|
|
if __name__ == "__main__":
|
|
generate_eq_w0(sys.argv[1], float(sys.argv[2]))
|