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test_conversions.py
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test_conversions.py
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# coding: utf-8
import numpy as np
import pysptk
from warnings import warn
from nose.tools import raises
def windowed_dummy_data(N):
np.random.seed(98765)
return pysptk.hanning(N) * np.random.randn(N)
def __test_conversion_base(f, src_order, dst_order, *args, **kwargs):
np.random.seed(98765)
src = np.random.rand(src_order + 1)
dst = f(src, dst_order, *args, **kwargs)
assert np.all(np.isfinite(dst))
def __test_transform_base(f, order, *args, **kwargs):
np.random.seed(98765)
src = np.random.rand(order + 1)
dst = f(src, *args, **kwargs)
assert np.all(np.isfinite(dst))
def test_lpc2c():
for src_order in [15, 20, 25, 30]:
for dst_order in [15, 20, 25, 30]:
yield __test_conversion_base, pysptk.lpc2c, src_order, dst_order
def test_lpc2lsp():
for order in [15, 20, 25, 30]:
yield __test_transform_base, pysptk.lpc2lsp, order
def __test_invalid_otype(dummy_lpc, otype):
pysptk.lpc2lsp(dummy_lpc, otype=otype)
np.random.seed(98765)
dummy_lpc = pysptk.lpc(np.random.rand(512), 21)
# invalid otype
yield raises(ValueError)(__test_invalid_otype), dummy_lpc, 2
yield raises(ValueError)(__test_invalid_otype), dummy_lpc, 3
lsp1 = pysptk.lpc2lsp(dummy_lpc, otype=2, fs=16000)
lsp2 = pysptk.lpc2lsp(dummy_lpc, otype=3, fs=16)
assert np.allclose(lsp1, lsp2)
# loggain
lsp3 = pysptk.lpc2lsp(dummy_lpc, otype=3, fs=16, loggain=True)
assert lsp3[0] == np.log(lsp2[0])
def test_lpc2par():
for order in [15, 20, 25, 30]:
yield __test_transform_base, pysptk.lpc2par, order
def test_par2lpc():
for order in [15, 20, 25, 30]:
yield __test_transform_base, pysptk.par2lpc, order
def test_lsp2sp():
for order in [15, 20, 25, 30]:
for fftlen in [256, 512, 1024]:
yield __test_transform_base, pysptk.lsp2sp, order, fftlen
def __test_fftlen(fftlen):
pysptk.lsp2sp(np.ones(20), fftlen)
for fftlen in [257, 513]:
yield raises(ValueError)(__test_fftlen), fftlen
def test_mc2b():
for order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
yield __test_transform_base, pysptk.mc2b, order, alpha
def test_b2mc():
for order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
yield __test_transform_base, pysptk.b2mc, order, alpha
def test_b2c():
for src_order in [15, 20, 25, 30]:
for dst_order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
yield __test_conversion_base, pysptk.b2c, src_order, dst_order, alpha
def test_c2acr():
for src_order in [15, 20, 25, 30]:
for dst_order in [15, 20, 25, 30]:
for fftlen in [256, 512, 1024]:
yield __test_transform_base, pysptk.b2c, src_order, dst_order, fftlen
def __test_fftlen(fftlen):
pysptk.c2acr(np.ones(20), 19, fftlen)
for fftlen in [257, 513]:
yield raises(ValueError)(__test_fftlen), fftlen
def test_c2ir():
for order in [15, 20, 25, 30]:
for length in [256, 512, 1024]:
yield __test_conversion_base, pysptk.c2ir, order, length
def test_ic2ir():
for length in [256, 512, 1024]:
for order in [15, 20, 25, 30]:
yield __test_conversion_base, pysptk.ic2ir, length, order
def test_ic2ir_invertibility():
def __test(order, length):
np.random.seed(98765)
dummy_ceps = np.random.rand(order + 1)
ir = pysptk.c2ir(dummy_ceps, length)
c = pysptk.ic2ir(ir, order)
assert np.allclose(c, dummy_ceps)
for order in [15, 20, 25, 30]:
for length in [256, 512, 1024]:
yield __test, order, length
def test_c2ndps():
for order in [15, 20, 25, 30]:
for fftlen in [256, 512, 1024]:
yield __test_conversion_base, pysptk.c2ndps, order, fftlen
# invalid fftlen
for fftlen in [255, 257]:
yield raises(ValueError)(__test_conversion_base), pysptk.c2ndps, 20, fftlen
def test_ndps2c():
for fftlen in [256, 512, 1024]:
for order in [15, 20, 25, 30]:
yield __test_conversion_base, pysptk.ndps2c, (fftlen >> 1), order
def __test(length):
pysptk.ndps2c(np.ones(length), 20)
# invalid fftlen
for fftlen in [255, 257]:
yield raises(ValueError)(__test), (fftlen >> 1)
def test_gc2gc():
def __test(src_order, src_gamma, dst_order, dst_gamma):
np.random.seed(98765)
src = np.random.rand(src_order + 1)
dst = pysptk.gc2gc(src, src_gamma, dst_order, dst_gamma)
assert np.all(np.isfinite(dst))
for src_order in [15, 20, 25, 30]:
for src_gamma in [-1.0, -0.5, 0.0]:
for dst_order in [15, 20, 25, 30]:
for dst_gamma in [-1.0, -0.5, 0.0]:
yield __test, src_order, src_gamma, dst_order, dst_gamma
# invalid gamma
yield raises(ValueError)(__test), 20, 0.0, 20, 0.1
yield raises(ValueError)(__test), 20, 0.1, 20, 0.0
def test_gnorm():
for order in [15, 20, 25, 30]:
for gamma in [-1.0, -0.5, 0.0]:
yield __test_transform_base, pysptk.gnorm, order, gamma
# invalid gamma
yield raises(ValueError)(__test_transform_base), pysptk.gnorm, 20, 0.1
def test_ignorm():
for order in [15, 20, 25, 30]:
for gamma in [-1.0, -0.5, 0.0]:
yield __test_transform_base, pysptk.ignorm, order, gamma
# invalid gamma
yield raises(ValueError)(__test_transform_base), pysptk.ignorm, 20, 0.1
def test_freqt():
for src_order in [15, 20, 25, 30]:
for dst_order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
yield __test_conversion_base, pysptk.freqt, src_order, dst_order, alpha
yield __test_conversion_base, pysptk.frqtr, src_order, dst_order, alpha
def test_mgc2mgc():
def __test(src_order, src_alpha, src_gamma, dst_order, dst_alpha, dst_gamma):
np.random.seed(98765)
src = np.random.rand(src_order + 1)
dst = pysptk.mgc2mgc(src, src_alpha, src_gamma,
dst_order, dst_alpha, dst_gamma)
assert np.all(np.isfinite(dst))
for src_order in [15, 20, 25, 30]:
for src_alpha in [0.35, 0.41, 0.5]:
for src_gamma in [-1.0, -0.5, 0.0]:
for dst_order in [15, 20, 25, 30]:
for dst_alpha in [0.35, 0.41, 0.5]:
for dst_gamma in [-1.0, -0.5, 0.0]:
yield __test, src_order, src_alpha, src_gamma, dst_order, dst_alpha, dst_gamma
# invalid gamma
yield raises(ValueError)(__test), 20, 0.0, 0.1, 20, 0.0, 0.0
yield raises(ValueError)(__test), 20, 0.0, 0.0, 20, 0.0, 0.1
def test_mgc2sp():
def __test(order, alpha, gamma, fftlen):
np.random.seed(98765)
src = np.random.rand(order + 1)
dst = pysptk.mgc2sp(src, alpha, gamma, fftlen)
assert len(dst) == (fftlen >> 1) + 1
assert np.all(np.isfinite(dst))
for order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
for gamma in [-1.0, -0.5, 0.0]:
for fftlen in [256, 512, 1024]:
yield __test, order, alpha, gamma, fftlen
def test_mgclsp2sp():
def __test(order, alpha, gamma, fftlen):
np.random.seed(98765)
src = np.random.rand(order + 1)
dst = pysptk.mgclsp2sp(src, alpha, gamma, fftlen)
assert len(dst) == (fftlen >> 1) + 1
assert np.all(np.isfinite(dst))
# TODO
warn("Inf/-Inf wiil happens when gamma = 0.0")
for order in [15, 20, 25, 30]:
for alpha in [0.35, 0.41, 0.5]:
for gamma in [-1.0, -0.5]:
for fftlen in [256, 512, 1024]:
yield __test, order, alpha, gamma, fftlen
# invalid gamma
yield raises(ValueError)(__test), 20, 0.0, 0.1, 256
# invalid fftlen
yield raises(ValueError)(__test), 20, 0.0, -0.1, 255
yield raises(ValueError)(__test), 20, 0.0, -0.1, 257
def test_mgc2b():
for order in [15, 20, 25, 30]:
for alpha in [0.0, 0.35, 0.41]:
for gamma in [-1.0, -0.5, 0.0]:
yield __test_transform_base, pysptk.mgc2b, order, alpha, gamma