111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
# Copyright 2024-2025 XMOS LIMITED.
|
|
# This Software is subject to the terms of the XMOS Public Licence: Version 1.
|
|
|
|
import numpy as np
|
|
import soundfile as sf
|
|
from pathlib import Path
|
|
import shutil
|
|
import subprocess
|
|
import audio_dsp.dsp.fir as fir
|
|
from audio_dsp.dsp.generic import Q_SIG
|
|
import audio_dsp.dsp.signal_gen as gen
|
|
import pytest
|
|
import os
|
|
from test.test_utils import xdist_safe_bin_write, float_to_qxx, qxx_to_float, q_convert_flt
|
|
|
|
|
|
bin_dir = Path(__file__).parent / "bin"
|
|
gen_dir = Path(__file__).parent / "autogen"
|
|
|
|
fs = 48000
|
|
|
|
|
|
def get_sig(len=0.05):
|
|
|
|
sig_fl = gen.log_chirp(fs, len, 0.5)
|
|
sig_fl = q_convert_flt(sig_fl, 23, Q_SIG)
|
|
sig_int = float_to_qxx(sig_fl)
|
|
|
|
name = "sig_48k"
|
|
sig_path = bin_dir / str(name + ".bin")
|
|
|
|
xdist_safe_bin_write(sig_int, sig_path)
|
|
|
|
# wav file does not need to be locked as it is only used for debugging outside pytest
|
|
wav_path = gen_dir / str(name + ".wav")
|
|
sf.write(wav_path, sig_fl, int(fs), "PCM_24")
|
|
|
|
return sig_fl
|
|
|
|
|
|
def get_c_wav(dir_name, sim = True):
|
|
app = "xsim" if sim else "xrun --io"
|
|
run_cmd = app + " " + str(bin_dir / "fir_direct_test.xe")
|
|
stdout = subprocess.check_output(run_cmd, cwd = dir_name, shell = True)
|
|
#print("run msg:\n", stdout)
|
|
|
|
sig_bin = dir_name / "sig_out.bin"
|
|
assert sig_bin.is_file(), f"Could not find output bin {sig_bin}"
|
|
sig_int = np.fromfile(sig_bin, dtype=np.int32)
|
|
|
|
sig_fl = qxx_to_float(sig_int)
|
|
sf.write(gen_dir / "sig_c.wav", sig_fl, fs, "PCM_24")
|
|
return sig_fl
|
|
|
|
|
|
def run_py(filt: fir.fir_direct, sig_fl):
|
|
out_int = np.zeros(sig_fl.size)
|
|
|
|
for n in range(sig_fl.size):
|
|
out_int[n] = filt.process_xcore(sig_fl[n])
|
|
|
|
# sf.write(gen_dir / "sig_py_int.wav", out_int, fs, "PCM_24")
|
|
|
|
return out_int
|
|
|
|
|
|
def single_test(filt, tname, sig_fl):
|
|
test_dir = bin_dir / tname
|
|
test_dir.mkdir(exist_ok = True, parents = True)
|
|
coeffs_arr = np.array(filt.coeffs_int, dtype=np.int32,ndmin=1)
|
|
taps_arr = np.array(filt.n_taps, dtype=np.int32, ndmin=1)
|
|
shift_arr = np.array(filt.shift, dtype=np.int32, ndmin=1)
|
|
filt_info = np.concatenate((shift_arr, taps_arr, coeffs_arr))
|
|
filt_info.tofile(test_dir / "coeffs.bin")
|
|
|
|
out_py_int = run_py(filt, sig_fl)
|
|
out_c = get_c_wav(test_dir)
|
|
shutil.rmtree(test_dir)
|
|
|
|
overflow_samples = (np.abs(out_py_int) >= (2**(31-filt.Q_sig) - 1))
|
|
np.testing.assert_allclose(out_c[~overflow_samples], out_py_int[~overflow_samples], rtol=0, atol=0)
|
|
|
|
|
|
@pytest.fixture(scope="module")
|
|
def in_signal():
|
|
bin_dir.mkdir(exist_ok=True, parents=True)
|
|
gen_dir.mkdir(exist_ok=True, parents=True)
|
|
return get_sig()
|
|
|
|
|
|
# Note the filter coeffs files are defined in test/fir/conftest.py
|
|
@pytest.mark.parametrize("coeff_path", ["passthrough_filter.txt",
|
|
"descending_coeffs.txt",
|
|
"simple_low_pass.txt",
|
|
"aggressive_high_pass.txt",
|
|
"comb.txt",
|
|
"tilt.txt"])
|
|
def test_fir_direct_c(in_signal, coeff_path):
|
|
# this test compares the Python process_xcore fir implementation
|
|
# against the lib_xcore_math version and checks for bit exactness
|
|
|
|
filt = fir.fir_direct(fs, 1, Path(gen_dir, coeff_path))
|
|
filter_name = f"fir_direct_{os.path.splitext(coeff_path)[0]}"
|
|
single_test(filt, filter_name, in_signal)
|
|
|
|
if __name__ =="__main__":
|
|
bin_dir.mkdir(exist_ok=True, parents=True)
|
|
gen_dir.mkdir(exist_ok=True, parents=True)
|
|
sig_fl = get_sig()
|
|
test_fir_direct_c(sig_fl, "descending_coeffs.txt")
|