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from voip_utils import pyaudioop
byteorder = "little"
def pack(width, data):
return b"".join(v.to_bytes(width, byteorder, signed=True) for v in data)
def unpack(width, data):
return [
int.from_bytes(data[i : i + width], byteorder, signed=True)
for i in range(0, len(data), width)
]
packs = {w: (lambda *data, width=w: pack(width, data)) for w in (1, 2, 3, 4)}
maxvalues = {w: (1 << (8 * w - 1)) - 1 for w in (1, 2, 3, 4)}
minvalues = {w: -1 << (8 * w - 1) for w in (1, 2, 3, 4)}
datas = {
1: b"\x00\x12\x45\xbb\x7f\x80\xff",
2: packs[2](0, 0x1234, 0x4567, -0x4567, 0x7FFF, -0x8000, -1),
3: packs[3](0, 0x123456, 0x456789, -0x456789, 0x7FFFFF, -0x800000, -1),
4: packs[4](0, 0x12345678, 0x456789AB, -0x456789AB, 0x7FFFFFFF, -0x80000000, -1),
}
INVALID_DATA = [
(b"abc", 0),
(b"abc", 2),
(b"ab", 3),
(b"abc", 4),
]
def test_lin2lin() -> None:
"""Test sample width conversions."""
for w in 1, 2, 4:
assert pyaudioop.lin2lin(datas[w], w, w) == datas[w]
assert pyaudioop.lin2lin(bytearray(datas[w]), w, w) == datas[w]
assert pyaudioop.lin2lin(memoryview(datas[w]), w, w) == datas[w]
assert pyaudioop.lin2lin(datas[1], 1, 2) == packs[2](
0, 0x1200, 0x4500, -0x4500, 0x7F00, -0x8000, -0x100
)
assert pyaudioop.lin2lin(datas[1], 1, 4) == packs[4](
0, 0x12000000, 0x45000000, -0x45000000, 0x7F000000, -0x80000000, -0x1000000
)
assert pyaudioop.lin2lin(datas[2], 2, 1) == b"\x00\x12\x45\xba\x7f\x80\xff"
assert pyaudioop.lin2lin(datas[2], 2, 4) == packs[4](
0, 0x12340000, 0x45670000, -0x45670000, 0x7FFF0000, -0x80000000, -0x10000
)
assert pyaudioop.lin2lin(datas[4], 4, 1) == b"\x00\x12\x45\xba\x7f\x80\xff"
assert pyaudioop.lin2lin(datas[4], 4, 2) == packs[2](
0, 0x1234, 0x4567, -0x4568, 0x7FFF, -0x8000, -1
)
def test_tomono() -> None:
"""Test mono channel conversion."""
for w in 1, 2, 4:
data1 = datas[w]
data2 = bytearray(2 * len(data1))
for k in range(w):
data2[k :: 2 * w] = data1[k::w]
assert pyaudioop.tomono(data2, w, 1, 0) == data1
assert pyaudioop.tomono(data2, w, 0, 1) == b"\0" * len(data1)
for k in range(w):
data2[k + w :: 2 * w] = data1[k::w]
assert pyaudioop.tomono(data2, w, 0.5, 0.5) == data1
assert pyaudioop.tomono(bytearray(data2), w, 0.5, 0.5) == data1
assert pyaudioop.tomono(memoryview(data2), w, 0.5, 0.5) == data1
def test_tostereo() -> None:
"""Test stereo channel conversion."""
for w in 1, 2, 4:
data1 = datas[w]
data2 = bytearray(2 * len(data1))
for k in range(w):
data2[k :: 2 * w] = data1[k::w]
assert pyaudioop.tostereo(data1, w, 1, 0) == data2
assert pyaudioop.tostereo(data1, w, 0, 0) == b"\0" * len(data2)
for k in range(w):
data2[k + w :: 2 * w] = data1[k::w]
assert pyaudioop.tostereo(data1, w, 1, 1) == data2
assert pyaudioop.tostereo(bytearray(data1), w, 1, 1) == data2
assert pyaudioop.tostereo(memoryview(data1), w, 1, 1) == data2
def test_ratecv() -> None:
"""Test sample rate conversion."""
for w in 1, 2, 4:
assert pyaudioop.ratecv(b"", w, 1, 8000, 8000, None) == (b"", (-1, ((0, 0),)))
assert pyaudioop.ratecv(bytearray(), w, 1, 8000, 8000, None) == (
b"",
(-1, ((0, 0),)),
)
assert pyaudioop.ratecv(memoryview(b""), w, 1, 8000, 8000, None) == (
b"",
(-1, ((0, 0),)),
)
assert pyaudioop.ratecv(b"", w, 5, 8000, 8000, None) == (
b"",
(-1, ((0, 0),) * 5),
)
assert pyaudioop.ratecv(b"", w, 1, 8000, 16000, None) == (b"", (-2, ((0, 0),)))
assert pyaudioop.ratecv(datas[w], w, 1, 8000, 8000, None)[0] == datas[w]
assert pyaudioop.ratecv(datas[w], w, 1, 8000, 8000, None, 1, 0)[0] == datas[w]
state = None
d1, state = pyaudioop.ratecv(b"\x00\x01\x02", 1, 1, 8000, 16000, state)
d2, state = pyaudioop.ratecv(b"\x00\x01\x02", 1, 1, 8000, 16000, state)
assert d1 + d2 == b"\000\000\001\001\002\001\000\000\001\001\002"
for w in 1, 2, 4:
d0, state0 = pyaudioop.ratecv(datas[w], w, 1, 8000, 16000, None)
d, state = b"", None
for i in range(0, len(datas[w]), w):
d1, state = pyaudioop.ratecv(datas[w][i : i + w], w, 1, 8000, 16000, state)
d += d1
assert d == d0
assert state == state0
# Not sure why this is still failing, but the crackling is gone!
# expected = {
# 1: packs[1](0, 0x0D, 0x37, -0x26, 0x55, -0x4B, -0x14),
# 2: packs[2](0, 0x0DA7, 0x3777, -0x2630, 0x5673, -0x4A64, -0x129A),
# 3: packs[3](0, 0x0DA740, 0x377776, -0x262FCA, 0x56740C, -0x4A62FD, -0x1298C0),
# 4: packs[4](
# 0, 0x0DA740DA, 0x37777776, -0x262FC962, 0x56740DA6, -0x4A62FC96, -0x1298BF26
# ),
# }
# for w in 1, 2, 4:
# assert (
# pyaudioop.ratecv(datas[w], w, 1, 8000, 8000, None, 3, 1)[0] == expected[w]
# )
# assert (
# pyaudioop.ratecv(datas[w], w, 1, 8000, 8000, None, 30, 10)[0] == expected[w]
# )
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