ref: 396103a699e2b71d501e282457c2e52faf3d9e95
dir: /python/tests/test_phasevoc.py/
#! /usr/bin/env python
from numpy.testing import TestCase, run_module_suite
from numpy.testing import assert_equal, assert_almost_equal
from aubio import fvec, cvec, pvoc
from numpy import array, shape
class aubio_pvoc_test_case(TestCase):
def test_members(self):
f = pvoc()
assert_equal ([f.win_s, f.hop_s], [1024, 512])
f = pvoc(2048, 128)
assert_equal ([f.win_s, f.hop_s], [2048, 128])
def test_zeros(self):
win_s, hop_s = 1024, 256
f = pvoc (win_s, hop_s)
t = fvec (hop_s)
for time in range( 4 * win_s / hop_s ):
s = f(t)
r = f.rdo(s)
assert_equal ( array(t), 0)
assert_equal ( s.norm, 0)
assert_equal ( s.phas, 0)
assert_equal ( r, 0)
def test_steps_two_channels(self):
""" check the resynthesis of steps is correct """
f = pvoc(1024, 512)
t1 = fvec(512)
t2 = fvec(512)
# positive step in first channel
t1[100:200] = .1
# positive step in second channel
t1[20:50] = -.1
s1 = f(t1)
r1 = f.rdo(s1)
s2 = f(t2)
r2 = f.rdo(s2)
#self.plot_this ( s1.norm.T )
assert_almost_equal ( t1, r2, decimal = 6 )
def test_steps_three_random_channels(self):
from random import random
f = pvoc(64, 16)
t0 = fvec(16)
t1 = fvec(16)
for i in xrange(16):
t1[i] = random() * 2. - 1.
t2 = f.rdo(f(t1))
t2 = f.rdo(f(t0))
t2 = f.rdo(f(t0))
t2 = f.rdo(f(t0))
assert_almost_equal( t1, t2, decimal = 6 )
def plot_this( self, this ):
from pylab import semilogy, show
semilogy ( this )
show ()
if __name__ == '__main__':
from unittest import main
main()