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import audioop
import unittest
from test.support import run_unittest
def gendata1():
return b'\0\1\2'
def gendata2():
if audioop.getsample(b'\0\1', 2, 0) == 1:
return b'\0\0\0\1\0\2'
else:
return b'\0\0\1\0\2\0'
def gendata4():
if audioop.getsample(b'\0\0\0\1', 4, 0) == 1:
return b'\0\0\0\0\0\0\0\1\0\0\0\2'
else:
return b'\0\0\0\0\1\0\0\0\2\0\0\0'
data = [gendata1(), gendata2(), gendata4()]
class TestAudioop(unittest.TestCase):
def test_max(self):
self.assertEqual(audioop.max(data[0], 1), 2)
self.assertEqual(audioop.max(data[1], 2), 2)
self.assertEqual(audioop.max(data[2], 4), 2)
def test_minmax(self):
self.assertEqual(audioop.minmax(data[0], 1), (0, 2))
self.assertEqual(audioop.minmax(data[1], 2), (0, 2))
self.assertEqual(audioop.minmax(data[2], 4), (0, 2))
def test_maxpp(self):
self.assertEqual(audioop.maxpp(data[0], 1), 0)
self.assertEqual(audioop.maxpp(data[1], 2), 0)
self.assertEqual(audioop.maxpp(data[2], 4), 0)
def test_avg(self):
self.assertEqual(audioop.avg(data[0], 1), 1)
self.assertEqual(audioop.avg(data[1], 2), 1)
self.assertEqual(audioop.avg(data[2], 4), 1)
def test_avgpp(self):
self.assertEqual(audioop.avgpp(data[0], 1), 0)
self.assertEqual(audioop.avgpp(data[1], 2), 0)
self.assertEqual(audioop.avgpp(data[2], 4), 0)
def test_rms(self):
self.assertEqual(audioop.rms(data[0], 1), 1)
self.assertEqual(audioop.rms(data[1], 2), 1)
self.assertEqual(audioop.rms(data[2], 4), 1)
def test_cross(self):
self.assertEqual(audioop.cross(data[0], 1), 0)
self.assertEqual(audioop.cross(data[1], 2), 0)
self.assertEqual(audioop.cross(data[2], 4), 0)
def test_add(self):
data2 = []
for d in data:
str = bytearray(len(d))
for i,b in enumerate(d):
str[i] = 2*b
data2.append(str)
self.assertEqual(audioop.add(data[0], data[0], 1), data2[0])
self.assertEqual(audioop.add(data[1], data[1], 2), data2[1])
self.assertEqual(audioop.add(data[2], data[2], 4), data2[2])
def test_bias(self):
# Note: this test assumes that avg() works
d1 = audioop.bias(data[0], 1, 100)
d2 = audioop.bias(data[1], 2, 100)
d4 = audioop.bias(data[2], 4, 100)
self.assertEqual(audioop.avg(d1, 1), 101)
self.assertEqual(audioop.avg(d2, 2), 101)
self.assertEqual(audioop.avg(d4, 4), 101)
def test_lin2lin(self):
# too simple: we test only the size
for d1 in data:
for d2 in data:
got = len(d1)//3
wtd = len(d2)//3
self.assertEqual(len(audioop.lin2lin(d1, got, wtd)), len(d2))
def test_adpcm2lin(self):
# Very cursory test
self.assertEqual(audioop.adpcm2lin(b'\0\0', 1, None), (b'\0\0\0\0', (0,0)))
def test_lin2adpcm(self):
# Very cursory test
self.assertEqual(audioop.lin2adpcm(b'\0\0\0\0', 1, None), (b'\0\0', (0,0)))
def test_lin2alaw(self):
self.assertEqual(audioop.lin2alaw(data[0], 1), b'\xd5\xc5\xf5')
self.assertEqual(audioop.lin2alaw(data[1], 2), b'\xd5\xd5\xd5')
self.assertEqual(audioop.lin2alaw(data[2], 4), b'\xd5\xd5\xd5')
def test_alaw2lin(self):
# Cursory
d = audioop.lin2alaw(data[0], 1)
self.assertEqual(audioop.alaw2lin(d, 1), data[0])
def test_lin2ulaw(self):
self.assertEqual(audioop.lin2ulaw(data[0], 1), b'\xff\xe7\xdb')
self.assertEqual(audioop.lin2ulaw(data[1], 2), b'\xff\xff\xff')
self.assertEqual(audioop.lin2ulaw(data[2], 4), b'\xff\xff\xff')
def test_ulaw2lin(self):
# Cursory
d = audioop.lin2ulaw(data[0], 1)
self.assertEqual(audioop.ulaw2lin(d, 1), data[0])
def test_mul(self):
data2 = []
for d in data:
str = bytearray(len(d))
for i,b in enumerate(d):
str[i] = 2*b
data2.append(str)
self.assertEqual(audioop.mul(data[0], 1, 2), data2[0])
self.assertEqual(audioop.mul(data[1],2, 2), data2[1])
self.assertEqual(audioop.mul(data[2], 4, 2), data2[2])
def test_ratecv(self):
state = None
d1, state = audioop.ratecv(data[0], 1, 1, 8000, 16000, state)
d2, state = audioop.ratecv(data[0], 1, 1, 8000, 16000, state)
self.assertEqual(d1 + d2, b'\000\000\001\001\002\001\000\000\001\001\002')
def test_reverse(self):
self.assertEqual(audioop.reverse(data[0], 1), b'\2\1\0')
def test_tomono(self):
data2 = bytearray()
for d in data[0]:
data2.append(d)
data2.append(d)
self.assertEqual(audioop.tomono(data2, 1, 0.5, 0.5), data[0])
def test_tostereo(self):
data2 = bytearray()
for d in data[0]:
data2.append(d)
data2.append(d)
self.assertEqual(audioop.tostereo(data[0], 1, 1, 1), data2)
def test_findfactor(self):
self.assertEqual(audioop.findfactor(data[1], data[1]), 1.0)
def test_findfit(self):
self.assertEqual(audioop.findfit(data[1], data[1]), (0, 1.0))
def test_findmax(self):
self.assertEqual(audioop.findmax(data[1], 1), 2)
def test_getsample(self):
for i in range(3):
self.assertEqual(audioop.getsample(data[0], 1, i), i)
self.assertEqual(audioop.getsample(data[1], 2, i), i)
self.assertEqual(audioop.getsample(data[2], 4, i), i)
def test_negativelen(self):
# from issue 3306, previously it segfaulted
self.assertRaises(audioop.error,
audioop.findmax, ''.join(chr(x) for x in range(256)), -2392392)
def test_main():
run_unittest(TestAudioop)
if __name__ == '__main__':
test_main()
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