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import os
import soundfile as sf
import torch
from librosa.core import load
from tests import get_tests_input_path, get_tests_output_path, get_tests_path
from TTS.vocoder.layers.pqmf import PQMF
TESTS_PATH = get_tests_path()
WAV_FILE = os.path.join(get_tests_input_path(), "example_1.wav")
def test_pqmf():
w, sr = load(WAV_FILE)
layer = PQMF(N=4, taps=62, cutoff=0.15, beta=9.0)
w, sr = load(WAV_FILE)
w2 = torch.from_numpy(w[None, None, :])
b2 = layer.analysis(w2)
w2_ = layer.synthesis(b2)
print(w2_.max())
print(w2_.min())
print(w2_.mean())
sf.write(os.path.join(get_tests_output_path(), "pqmf_output.wav"), w2_.flatten().detach(), sr)