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from re import escape
import numpy as np
import pytest
from av import AudioFrame
from .common import assertNdarraysEqual
def test_null_constructor() -> None:
frame = AudioFrame()
assert frame.format.name == "s16"
assert frame.layout.name == "stereo"
assert len(frame.planes) == 0
assert frame.samples == 0
def test_manual_flt_mono_constructor() -> None:
frame = AudioFrame(format="flt", layout="mono", samples=160)
assert frame.format.name == "flt"
assert frame.layout.name == "mono"
assert len(frame.planes) == 1
assert frame.planes[0].buffer_size == 640
assert frame.samples == 160
def test_manual_flt_stereo_constructor() -> None:
frame = AudioFrame(format="flt", layout="stereo", samples=160)
assert frame.format.name == "flt"
assert frame.layout.name == "stereo"
assert len(frame.planes) == 1
assert frame.planes[0].buffer_size == 1280
assert frame.samples == 160
def test_manual_fltp_stereo_constructor() -> None:
frame = AudioFrame(format="fltp", layout="stereo", samples=160)
assert frame.format.name == "fltp"
assert frame.layout.name == "stereo"
assert len(frame.planes) == 2
assert frame.planes[0].buffer_size == 640
assert frame.planes[1].buffer_size == 640
assert frame.samples == 160
def test_manual_s16_mono_constructor() -> None:
frame = AudioFrame(format="s16", layout="mono", samples=160)
assert frame.format.name == "s16"
assert frame.layout.name == "mono"
assert len(frame.planes) == 1
assert frame.planes[0].buffer_size == 320
assert frame.samples == 160
def test_manual_s16_mono_constructor_align_8() -> None:
frame = AudioFrame(format="s16", layout="mono", samples=159, align=8)
assert frame.format.name == "s16"
assert frame.layout.name == "mono"
assert len(frame.planes) == 1
assert frame.planes[0].buffer_size == 320
assert frame.samples == 159
def test_manual_s16_stereo_constructor() -> None:
frame = AudioFrame(format="s16", layout="stereo", samples=160)
assert frame.format.name == "s16"
assert frame.layout.name == "stereo"
assert len(frame.planes) == 1
assert frame.planes[0].buffer_size == 640
assert frame.samples == 160
def test_manual_s16p_stereo_constructor() -> None:
frame = AudioFrame(format="s16p", layout="stereo", samples=160)
assert frame.format.name == "s16p"
assert frame.layout.name == "stereo"
assert len(frame.planes) == 2
assert frame.planes[0].buffer_size == 320
assert frame.planes[1].buffer_size == 320
assert frame.samples == 160
def test_basic_to_ndarray() -> None:
frame = AudioFrame(format="s16p", layout="stereo", samples=160)
array = frame.to_ndarray()
assert array.dtype == "i2"
assert array.shape == (2, 160)
def test_ndarray_dbl() -> None:
layouts = [
("dbl", "mono", (1, 160)),
("dbl", "stereo", (1, 320)),
("dblp", "mono", (1, 160)),
("dblp", "stereo", (2, 160)),
]
for format, layout, size in layouts:
array = np.zeros(shape=size, dtype="f8")
for i in range(size[0]):
array[i][:] = np.random.rand(size[1])
frame = AudioFrame.from_ndarray(array, format=format, layout=layout)
assert frame.format.name == format
assert frame.layout.name == layout
assert frame.samples == 160
assertNdarraysEqual(frame.to_ndarray(), array)
def test_from_ndarray_value_error() -> None:
# incorrect dtype
array = np.zeros(shape=(1, 160), dtype="f2")
with pytest.raises(
ValueError, match="Expected numpy array with dtype `float32` but got `float16`"
) as cm:
AudioFrame.from_ndarray(array, format="flt", layout="mono")
# incorrect number of dimensions
array2 = np.zeros(shape=(1, 160, 2), dtype="f4")
with pytest.raises(
ValueError, match="Expected numpy array with ndim `2` but got `3`"
) as cm:
AudioFrame.from_ndarray(array2, format="flt", layout="mono")
# incorrect shape
array = np.zeros(shape=(2, 160), dtype="f4")
with pytest.raises(
ValueError,
match=escape("Expected packed `array.shape[0]` to equal `1` but got `2`"),
) as cm:
AudioFrame.from_ndarray(array, format="flt", layout="mono")
def test_ndarray_flt() -> None:
layouts = [
("flt", "mono", (1, 160)),
("flt", "stereo", (1, 320)),
("fltp", "mono", (1, 160)),
("fltp", "stereo", (2, 160)),
]
for format, layout, size in layouts:
array: np.ndarray = np.zeros(shape=size, dtype="f4")
for i in range(size[0]):
array[i][:] = np.random.rand(size[1])
frame = AudioFrame.from_ndarray(array, format=format, layout=layout)
assert frame.format.name == format
assert frame.layout.name == layout
assert frame.samples == 160
assertNdarraysEqual(frame.to_ndarray(), array)
def test_ndarray_s16() -> None:
layouts = [
("s16", "mono", (1, 160)),
("s16", "stereo", (1, 320)),
("s16p", "mono", (1, 160)),
("s16p", "stereo", (2, 160)),
]
for format, layout, size in layouts:
array = np.random.randint(0, 256, size=size, dtype="i2")
frame = AudioFrame.from_ndarray(array, format=format, layout=layout)
assert frame.format.name == format
assert frame.layout.name == layout
assert frame.samples == 160
assertNdarraysEqual(frame.to_ndarray(), array)
def test_ndarray_s16p_align_8() -> None:
frame = AudioFrame(format="s16p", layout="stereo", samples=159, align=8)
array = frame.to_ndarray()
assert array.dtype == "i2"
assert array.shape == (2, 159)
def test_ndarray_s32() -> None:
layouts = [
("s32", "mono", (1, 160)),
("s32", "stereo", (1, 320)),
("s32p", "mono", (1, 160)),
("s32p", "stereo", (2, 160)),
]
for format, layout, size in layouts:
array = np.random.randint(0, 256, size=size, dtype="i4")
frame = AudioFrame.from_ndarray(array, format=format, layout=layout)
assert frame.format.name == format
assert frame.layout.name == layout
assert frame.samples == 160
assertNdarraysEqual(frame.to_ndarray(), array)
def test_ndarray_u8() -> None:
layouts = [
("u8", "mono", (1, 160)),
("u8", "stereo", (1, 320)),
("u8p", "mono", (1, 160)),
("u8p", "stereo", (2, 160)),
]
for format, layout, size in layouts:
array = np.random.randint(0, 256, size=size, dtype="u1")
frame = AudioFrame.from_ndarray(array, format=format, layout=layout)
assert frame.format.name == format
assert frame.layout.name == layout
assert frame.samples == 160
assertNdarraysEqual(frame.to_ndarray(), array)
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