def test():
p = wave.record("-", stdout=wave.sp.PIPE)
f = stream.Reader(p.stdout)
result = zip(range(10), f)
p.stop()
j = 0
for i, buf in result:
assert i == j
assert len(buf) == f.SAMPLES
j += 1
try:
for buf in f:
pass
except IOError as e:
assert str(e) == "timeout"
def recv():
out = wave.record('-', stdout=wave.sp.PIPE).stdout
while True:
data = out.read(len(sig_dump))
if len(data) < len(sig_dump):
return
try:
x = common.loads(data)
except common.SaturationError as e:
print('saturation: {}'.format(e))
continue
x = x - np.mean(x)
c = np.abs(np.dot(x, sig)) / (np.sqrt(0.5 * len(x)) * sigproc.norm(x))
z = np.dot(x, sig.conj()) / (0.5 * len(x))
amp = np.abs(z)
phase = np.angle(z)
peak = np.max(np.abs(x))
print('coherence={:.3f} amp={:.3f} phase={:.1f} peak={:.3f}'.format(
c, amp, phase * 180 / np.pi, peak))
