206 lines
6.6 KiB
Python
206 lines
6.6 KiB
Python
import os
|
|
import sys
|
|
import tempfile
|
|
from io import BytesIO
|
|
|
|
import numpy as np
|
|
from numpy.testing import (assert_equal, assert_, assert_array_equal,
|
|
suppress_warnings)
|
|
from pytest import raises, warns
|
|
|
|
from scipy.io import wavfile
|
|
|
|
|
|
def datafile(fn):
|
|
return os.path.join(os.path.dirname(__file__), 'data', fn)
|
|
|
|
|
|
def test_read_1():
|
|
# 32-bit PCM (which uses extensible format)
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-le-1ch-4bytes.wav'
|
|
rate, data = wavfile.read(datafile(filename), mmap=mmap)
|
|
|
|
assert_equal(rate, 44100)
|
|
assert_(np.issubdtype(data.dtype, np.int32))
|
|
assert_equal(data.shape, (4410,))
|
|
|
|
del data
|
|
|
|
|
|
def test_read_2():
|
|
# 8-bit unsigned PCM
|
|
for mmap in [False, True]:
|
|
filename = 'test-8000Hz-le-2ch-1byteu.wav'
|
|
rate, data = wavfile.read(datafile(filename), 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():
|
|
# Little-endian float
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-2ch-32bit-float-le.wav'
|
|
rate, data = wavfile.read(datafile(filename), 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():
|
|
# Contains unsupported 'PEAK' chunk
|
|
for mmap in [False, True]:
|
|
with suppress_warnings() as sup:
|
|
sup.filter(wavfile.WavFileWarning,
|
|
"Chunk .non-data. not understood, skipping it")
|
|
filename = 'test-48000Hz-2ch-64bit-float-le-wavex.wav'
|
|
rate, data = wavfile.read(datafile(filename), 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():
|
|
# Big-endian float
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-2ch-32bit-float-be.wav'
|
|
rate, data = wavfile.read(datafile(filename), 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_unknown_filetype_fail():
|
|
# Not an RIFF
|
|
for mmap in [False, True]:
|
|
filename = 'example_1.nc'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with raises(ValueError, match="CDF.*'RIFF' and 'RIFX' supported"):
|
|
wavfile.read(fp, mmap=mmap)
|
|
|
|
|
|
def test_read_unknown_riff_form_type():
|
|
# RIFF, but not WAVE form
|
|
for mmap in [False, True]:
|
|
filename = 'Transparent Busy.ani'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with raises(ValueError, match='Not a WAV file.*ACON'):
|
|
wavfile.read(fp, mmap=mmap)
|
|
|
|
|
|
def test_read_unknown_wave_format():
|
|
# RIFF and WAVE, but not supported format
|
|
for mmap in [False, True]:
|
|
filename = 'test-8000Hz-le-1ch-1byte-ulaw.wav'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with raises(ValueError, match='Unknown wave file format.*MULAW.*'
|
|
'Supported formats'):
|
|
wavfile.read(fp, mmap=mmap)
|
|
|
|
|
|
def test_read_early_eof_with_data():
|
|
# File ends inside 'data' chunk, but we keep incomplete data
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-le-1ch-4bytes-early-eof.wav'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with warns(wavfile.WavFileWarning, match='Reached EOF'):
|
|
rate, data = wavfile.read(fp, mmap=mmap)
|
|
|
|
assert_(data.size > 0)
|
|
assert_equal(rate, 44100)
|
|
|
|
del data
|
|
|
|
|
|
def test_read_early_eof():
|
|
# File ends after 'fact' chunk at boundary, no data read
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-le-1ch-4bytes-early-eof-no-data.wav'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with raises(ValueError, match="Unexpected end of file."):
|
|
wavfile.read(fp, mmap=mmap)
|
|
|
|
|
|
def test_read_incomplete_chunk():
|
|
# File ends inside 'fmt ' chunk ID, no data read
|
|
for mmap in [False, True]:
|
|
filename = 'test-44100Hz-le-1ch-4bytes-incomplete-chunk.wav'
|
|
with open(datafile(filename), 'rb') as fp:
|
|
with raises(ValueError, match="Incomplete chunk ID.*b'f'"):
|
|
wavfile.read(fp, mmap=mmap)
|
|
|
|
|
|
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)
|