You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
160 lines
5.0 KiB
Python
160 lines
5.0 KiB
Python
from __future__ import division, print_function, absolute_import
|
|
|
|
import os
|
|
import sys
|
|
import tempfile
|
|
from io import BytesIO
|
|
|
|
import numpy as np
|
|
from numpy.testing import assert_equal, assert_, assert_array_equal
|
|
from pytest import raises as assert_raises
|
|
from scipy._lib._numpy_compat import suppress_warnings
|
|
|
|
from scipy.io import wavfile
|
|
|
|
|
|
def datafile(fn):
|
|
return os.path.join(os.path.dirname(__file__), 'data', fn)
|
|
|
|
|
|
def test_read_1():
|
|
for mmap in [False, True]:
|
|
rate, data = wavfile.read(datafile('test-44100Hz-le-1ch-4bytes.wav'),
|
|
mmap=mmap)
|
|
|
|
assert_equal(rate, 44100)
|
|
assert_(np.issubdtype(data.dtype, np.int32))
|
|
assert_equal(data.shape, (4410,))
|
|
|
|
del data
|
|
|
|
|
|
def test_read_2():
|
|
for mmap in [False, True]:
|
|
rate, data = wavfile.read(datafile('test-8000Hz-le-2ch-1byteu.wav'),
|
|
mmap=mmap)
|
|
assert_equal(rate, 8000)
|
|
assert_(np.issubdtype(data.dtype, np.uint8))
|
|
assert_equal(data.shape, (800, 2))
|
|
|
|
del data
|
|
|
|
def test_read_3():
|
|
for mmap in [False, True]:
|
|
rate, data = wavfile.read(datafile('test-44100Hz-2ch-32bit-float-le.wav'),
|
|
mmap=mmap)
|
|
assert_equal(rate, 44100)
|
|
assert_(np.issubdtype(data.dtype, np.float32))
|
|
assert_equal(data.shape, (441, 2))
|
|
|
|
del data
|
|
|
|
def test_read_4():
|
|
for mmap in [False, True]:
|
|
with suppress_warnings() as sup:
|
|
sup.filter(wavfile.WavFileWarning,
|
|
"Chunk .non-data. not understood, skipping it")
|
|
rate, data = wavfile.read(datafile('test-48000Hz-2ch-64bit-float-le-wavex.wav'),
|
|
mmap=mmap)
|
|
|
|
assert_equal(rate, 48000)
|
|
assert_(np.issubdtype(data.dtype, np.float64))
|
|
assert_equal(data.shape, (480, 2))
|
|
|
|
del data
|
|
|
|
|
|
def test_read_5():
|
|
for mmap in [False, True]:
|
|
rate, data = wavfile.read(datafile('test-44100Hz-2ch-32bit-float-be.wav'),
|
|
mmap=mmap)
|
|
assert_equal(rate, 44100)
|
|
assert_(np.issubdtype(data.dtype, np.float32))
|
|
assert_(data.dtype.byteorder == '>' or (sys.byteorder == 'big' and
|
|
data.dtype.byteorder == '='))
|
|
assert_equal(data.shape, (441, 2))
|
|
|
|
del data
|
|
|
|
|
|
def test_read_fail():
|
|
for mmap in [False, True]:
|
|
fp = open(datafile('example_1.nc'), 'rb')
|
|
assert_raises(ValueError, wavfile.read, fp, mmap=mmap)
|
|
fp.close()
|
|
|
|
|
|
def test_read_early_eof():
|
|
for mmap in [False, True]:
|
|
fp = open(datafile('test-44100Hz-le-1ch-4bytes-early-eof.wav'), 'rb')
|
|
assert_raises(ValueError, wavfile.read, fp, mmap=mmap)
|
|
fp.close()
|
|
|
|
|
|
def test_read_incomplete_chunk():
|
|
for mmap in [False, True]:
|
|
fp = open(datafile('test-44100Hz-le-1ch-4bytes-incomplete-chunk.wav'), 'rb')
|
|
assert_raises(ValueError, wavfile.read, fp, mmap=mmap)
|
|
fp.close()
|
|
|
|
|
|
def _check_roundtrip(realfile, rate, dtype, channels):
|
|
if realfile:
|
|
fd, tmpfile = tempfile.mkstemp(suffix='.wav')
|
|
os.close(fd)
|
|
else:
|
|
tmpfile = BytesIO()
|
|
try:
|
|
data = np.random.rand(100, channels)
|
|
if channels == 1:
|
|
data = data[:,0]
|
|
if dtype.kind == 'f':
|
|
# The range of the float type should be in [-1, 1]
|
|
data = data.astype(dtype)
|
|
else:
|
|
data = (data*128).astype(dtype)
|
|
|
|
wavfile.write(tmpfile, rate, data)
|
|
|
|
for mmap in [False, True]:
|
|
rate2, data2 = wavfile.read(tmpfile, mmap=mmap)
|
|
|
|
assert_equal(rate, rate2)
|
|
assert_(data2.dtype.byteorder in ('<', '=', '|'), msg=data2.dtype)
|
|
assert_array_equal(data, data2)
|
|
|
|
del data2
|
|
finally:
|
|
if realfile:
|
|
os.unlink(tmpfile)
|
|
|
|
|
|
def test_write_roundtrip():
|
|
for realfile in (False, True):
|
|
for dtypechar in ('i', 'u', 'f', 'g', 'q'):
|
|
for size in (1, 2, 4, 8):
|
|
if size == 1 and dtypechar == 'i':
|
|
# signed 8-bit integer PCM is not allowed
|
|
continue
|
|
if size > 1 and dtypechar == 'u':
|
|
# unsigned > 8-bit integer PCM is not allowed
|
|
continue
|
|
if (size == 1 or size == 2) and dtypechar == 'f':
|
|
# 8- or 16-bit float PCM is not expected
|
|
continue
|
|
if dtypechar in 'gq':
|
|
# no size allowed for these types
|
|
if size == 1:
|
|
size = ''
|
|
else:
|
|
continue
|
|
|
|
for endianness in ('>', '<'):
|
|
if size == 1 and endianness == '<':
|
|
continue
|
|
for rate in (8000, 32000):
|
|
for channels in (1, 2, 5):
|
|
dt = np.dtype('%s%s%s' % (endianness, dtypechar, size))
|
|
_check_roundtrip(realfile, rate, dt, channels)
|
|
|