def test_requests(self, ext, compression):
sample_rate = 16000
channels_first = True
effects = [['band', '300', '10']]
format_ = ext if ext in ['mp3'] else None
audio_file = f'input.{ext}'
input_path = self.get_temp_path(audio_file)
reference_path = self.get_temp_path('reference.wav')
sox_utils.gen_audio_file(input_path,
sample_rate,
num_channels=2,
compression=compression)
sox_utils.run_sox_effect(input_path,
reference_path,
effects,
output_bitdepth=32)
expected, expected_sr = load_wav(reference_path)
url = self.get_url(audio_file)
with requests.get(url, stream=True) as resp:
found, sr = sox_effects.apply_effects_file(
resp.raw,
effects,
channels_first=channels_first,
format=format_)
save_wav(self.get_temp_path('result.wav'),
found,
sr,
channels_first=channels_first)
assert sr == expected_sr
self.assertEqual(found, expected)
def _make_file(self, format_):
sample_rate = 8000
path = self.get_temp_path(f'test.{format_}')
sox_utils.gen_audio_file(f'{path}', sample_rate, num_channels=2)
self.original = sox_io_backend.load(path)[0]
self.path = os.path.splitext(path)[0]
os.rename(path, self.path)
def assert_amr_nb(self, duration):
"""`sox_io_backend.load` can load amr-nb format.
This test takes the same strategy as mp3 to compare the result
"""
sample_rate = 8000
num_channels = 1
path = self.get_temp_path('1.original.amr-nb')
ref_path = self.get_temp_path('2.reference.wav')
# 1. Generate amr-nb with sox
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
bit_depth=32,
duration=duration)
# 2. Convert to wav with sox
sox_utils.convert_audio_file(path, ref_path)
# 3. Load amr-nb with torchaudio
data, sr = sox_io_backend.load(path)
# 4. Load wav with scipy
data_ref = load_wav(ref_path)[0]
# 5. Compare
assert sr == sample_rate
self.assertEqual(data, data_ref, atol=4e-05, rtol=1.3e-06)
def test_tarfile(self, ext, compression):
"""Applying effects to compressed audio via file-like file works"""
sample_rate = 16000
channels_first = True
effects = [['band', '300', '10']]
format_ = ext if ext in ['mp3'] else None
audio_file = f'input.{ext}'
input_path = self.get_temp_path(audio_file)
reference_path = self.get_temp_path('reference.wav')
archive_path = self.get_temp_path('archive.tar.gz')
sox_utils.gen_audio_file(
input_path, sample_rate, num_channels=2, compression=compression)
sox_utils.run_sox_effect(
input_path, reference_path, effects, output_bitdepth=32)
expected, expected_sr = load_wav(reference_path)
with tarfile.TarFile(archive_path, 'w') as tarobj:
tarobj.add(input_path, arcname=audio_file)
with tarfile.TarFile(archive_path, 'r') as tarobj:
fileobj = tarobj.extractfile(audio_file)
found, sr = sox_effects.apply_effects_file(
fileobj, effects, channels_first=channels_first, format=format_)
save_wav(self.get_temp_path('result.wav'), found, sr, channels_first=channels_first)
assert sr == expected_sr
self.assertEqual(found, expected)
def assert_vorbis(self, sample_rate, num_channels, quality_level,
duration):
"""`sox_io_backend.load` can load vorbis format.
This test takes the same strategy as mp3 to compare the result
"""
path = self.get_temp_path('1.original.vorbis')
ref_path = self.get_temp_path('2.reference.wav')
# 1. Generate vorbis with sox
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
compression=quality_level,
bit_depth=16,
duration=duration)
# 2. Convert to wav with sox
sox_utils.convert_audio_file(path, ref_path)
# 3. Load vorbis with torchaudio
data, sr = sox_io_backend.load(path)
# 4. Load wav with scipy
data_ref = load_wav(ref_path)[0]
# 5. Compare
assert sr == sample_rate
self.assertEqual(data, data_ref, atol=4e-05, rtol=1.3e-06)
def test_bytesio(self, ext, compression):
"""Applying effects via BytesIO object works"""
sample_rate = 16000
channels_first = True
effects = [['band', '300', '10']]
format_ = ext if ext in ['mp3'] else None
input_path = self.get_temp_path(f'input.{ext}')
reference_path = self.get_temp_path('reference.wav')
sox_utils.gen_audio_file(input_path,
sample_rate,
num_channels=2,
compression=compression)
sox_utils.run_sox_effect(input_path,
reference_path,
effects,
output_bitdepth=32)
expected, expected_sr = load_wav(reference_path)
with open(input_path, 'rb') as file_:
fileobj = io.BytesIO(file_.read())
found, sr = sox_effects.apply_effects_file(
fileobj, effects, channels_first=channels_first, format=format_)
save_wav(self.get_temp_path('result.wav'),
found,
sr,
channels_first=channels_first)
assert sr == expected_sr
self.assertEqual(found, expected)
def _gen_file(self, ext, dtype, sample_rate, num_channels, num_frames):
path = self.get_temp_path(f'test.{ext}')
bit_depth = sox_utils.get_bit_depth(dtype)
duration = num_frames / sample_rate
sox_utils.gen_audio_file(
path, sample_rate, num_channels=num_channels,
encoding=sox_utils.get_encoding(dtype),
bit_depth=bit_depth,
duration=duration)
return path
def test_sphere(self, sample_rate, num_channels):
"""`sox_io_backend.info` can check sph file correctly"""
duration = 1
path = self.get_temp_path('data.sph')
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
def test_amb(self, dtype, sample_rate, num_channels):
"""`sox_io_backend.info` can check amb file correctly"""
duration = 1
path = self.get_temp_path('data.amb')
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
bit_depth=sox_utils.get_bit_depth(dtype),
duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
def test_sphere(self, sample_rate, num_channels, bits_per_sample):
"""`sox_io_backend.info` can check sph file correctly"""
duration = 1
path = self.get_temp_path('data.sph')
sox_utils.gen_audio_file(
path, sample_rate, num_channels, duration=duration,
bit_depth=bits_per_sample)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == bits_per_sample
assert info.encoding == "PCM_S"
def test_gsm(self):
"""`sox_io_backend.info` can check gsm file correctly"""
duration = 1
num_channels = 1
sample_rate = 8000
path = self.get_temp_path('data.gsm')
sox_utils.gen_audio_file(
path, sample_rate=sample_rate, num_channels=num_channels,
duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_channels == num_channels
assert info.bits_per_sample == 0
assert info.encoding == "GSM"
def test_vorbis(self, sample_rate, num_channels, quality_level):
"""`sox_io_backend.info` can check vorbis file correctly"""
duration = 1
path = self.get_temp_path('data.vorbis')
sox_utils.gen_audio_file(
path, sample_rate, num_channels,
compression=quality_level, duration=duration,
)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == 0 # bit_per_sample is irrelevant for compressed formats
assert info.encoding == "VORBIS"
def test_flac(self, sample_rate, num_channels, compression_level):
"""`sox_io_backend.info` can check flac file correctly"""
duration = 1
path = self.get_temp_path('data.flac')
sox_utils.gen_audio_file(
path, sample_rate, num_channels,
compression=compression_level, duration=duration,
)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == 24 # FLAC standard
assert info.encoding == "FLAC"
def test_vorbis(self, sample_rate, num_channels, quality_level):
"""`sox_io_backend.info` can check vorbis file correctly"""
duration = 1
path = self.get_temp_path('data.vorbis')
sox_utils.gen_audio_file(
path,
sample_rate,
num_channels,
compression=quality_level,
duration=duration,
)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
def test_htk(self):
"""`sox_io_backend.info` can check HTK file correctly"""
duration = 1
num_channels = 1
sample_rate = 8000
path = self.get_temp_path('data.htk')
sox_utils.gen_audio_file(
path, sample_rate=sample_rate, num_channels=num_channels,
bit_depth=16, duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == 16
assert info.encoding == "PCM_S"
def test_mp3(self, sample_rate, num_channels, bit_rate):
"""`sox_io_backend.info` can check mp3 file correctly"""
duration = 1
path = self.get_temp_path('data.mp3')
sox_utils.gen_audio_file(
path, sample_rate, num_channels,
compression=bit_rate, duration=duration,
)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
# mp3 does not preserve the number of samples
# assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == 0 # bit_per_sample is irrelevant for compressed formats
assert info.encoding == "MP3"
def test_amr_nb(self):
"""`sox_io_backend.info` can check amr-nb file correctly"""
duration = 1
num_channels = 1
sample_rate = 8000
path = self.get_temp_path('data.amr-nb')
sox_utils.gen_audio_file(path,
sample_rate=sample_rate,
num_channels=num_channels,
bit_depth=16,
duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
def test_requests(self, ext, compression):
sample_rate = 16000
format_ = ext if ext in ['mp3'] else None
audio_file = f'test.{ext}'
audio_path = self.get_temp_path(audio_file)
sox_utils.gen_audio_file(
audio_path, sample_rate, num_channels=2, compression=compression)
expected, _ = sox_io_backend.load(audio_path)
url = self.get_url(audio_file)
with requests.get(url, stream=True) as resp:
found, sr = sox_io_backend.load(resp.raw, format=format_)
assert sr == sample_rate
self.assertEqual(expected, found)
def test_fileobj(self, ext, compression):
"""Loading audio via file object returns the same result as via file path."""
sample_rate = 16000
format_ = ext if ext in ['mp3'] else None
path = self.get_temp_path(f'test.{ext}')
sox_utils.gen_audio_file(
path, sample_rate, num_channels=2,
compression=compression)
expected, _ = sox_io_backend.load(path)
with open(path, 'rb') as fileobj:
found, sr = sox_io_backend.load(fileobj, format=format_)
assert sr == sample_rate
self.assertEqual(expected, found)
def test_alaw(self):
"""`sox_io_backend.info` can check alaw file correctly"""
duration = 1
num_channels = 1
sample_rate = 8000
path = self.get_temp_path('data.wav')
sox_utils.gen_audio_file(
path, sample_rate=sample_rate, num_channels=num_channels,
bit_depth=8, encoding='a-law',
duration=duration)
info = sox_io_backend.info(path)
assert info.sample_rate == sample_rate
assert info.num_frames == sample_rate * duration
assert info.num_channels == num_channels
assert info.bits_per_sample == 8
assert info.encoding == "ALAW"
def test_vorbis(self, sample_rate, num_channels):
"""`apply_effects_file` works on various vorbis format"""
channels_first = True
effects = [['band', '300', '10']]
input_path = self.get_temp_path('input.vorbis')
reference_path = self.get_temp_path('reference.wav')
sox_utils.gen_audio_file(input_path, sample_rate, num_channels)
sox_utils.run_sox_effect(input_path, reference_path, effects, output_bitdepth=32)
expected, expected_sr = load_wav(reference_path)
found, sr = sox_effects.apply_effects_file(
input_path, effects, channels_first=channels_first)
save_wav(self.get_temp_path('result.wav'), found, sr, channels_first=channels_first)
assert sr == expected_sr
self.assertEqual(found, expected)
def assert_24bit_wav(self, sample_rate, num_channels, normalize, duration):
""" `sox_io_backend.load` can load 24-bit signed PCM wav format. Since torch does not support the ``int24`` dtype,
we implicitly cast the resulting tensor to the ``int32`` dtype.
It is not possible to use #assert_wav method above, as #get_wav_data does not support
the 'int24' dtype. This is because torch does not support the ``int24`` dtype.
Hence, we must use the following workaround.
x
|
| 1. Generate 24-bit wav with Sox.
|
v 2. Convert 24-bit wav to 32-bit wav with Sox.
wav(24-bit) ----------------------> wav(32-bit)
| |
| 3. Load 24-bit wav with torchaudio| 4. Load 32-bit wav with scipy
| |
v v
tensor ----------> x <----------- tensor
5. Compare
# Underlying assumptions are:
# i. Sox properly converts from 24-bit to 32-bit
# ii. Loading 32-bit wav file with scipy is correct.
"""
path = self.get_temp_path('1.original.wav')
ref_path = self.get_temp_path('2.reference.wav')
# 1. Generate 24-bit signed wav with Sox
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
bit_depth=24,
duration=duration)
# 2. Convert from 24-bit wav to 32-bit wav with sox
sox_utils.convert_audio_file(path, ref_path, bit_depth=32)
# 3. Load 24-bit wav with torchaudio
data, sr = sox_io_backend.load(path, normalize=normalize)
# 4. Load 32-bit wav with scipy
data_ref = load_wav(ref_path, normalize=normalize)[0]
# 5. Compare
assert sr == sample_rate
self.assertEqual(data, data_ref, atol=3e-03, rtol=1.3e-06)
def assert_mp3(self, sample_rate, num_channels, bit_rate, duration):
"""`sox_io_backend.load` can load mp3 format.
mp3 encoding introduces delay and boundary effects so
we create reference wav file from mp3
x
|
| 1. Generate mp3 with Sox
|
v 2. Convert to wav with Sox
mp3 ------------------------------> wav
| |
| 3. Load with torchaudio | 4. Load with scipy
| |
v v
tensor ----------> x <----------- tensor
5. Compare
Underlying assumptions are:
i. Conversion of mp3 to wav with Sox preserves data.
ii. Loading wav file with scipy is correct.
By combining i & ii, step 2. and 4. allows to load reference mp3 data
without using torchaudio
"""
path = self.get_temp_path('1.original.mp3')
ref_path = self.get_temp_path('2.reference.wav')
# 1. Generate mp3 with sox
sox_utils.gen_audio_file(path,
sample_rate,
num_channels,
compression=bit_rate,
duration=duration)
# 2. Convert to wav with sox
sox_utils.convert_audio_file(path, ref_path)
# 3. Load mp3 with torchaudio
data, sr = sox_io_backend.load(path)
# 4. Load wav with scipy
data_ref = load_wav(ref_path)[0]
# 5. Compare
assert sr == sample_rate
self.assertEqual(data, data_ref, atol=3e-03, rtol=1.3e-06)
def test_bytesio_clogged(self, ext, compression):
"""Loading audio via clogged file object returns the same result as via file path.
This test case validates the case where fileobject returns shorter bytes than requeted.
"""
sample_rate = 16000
format_ = ext if ext in ['mp3'] else None
path = self.get_temp_path(f'test.{ext}')
sox_utils.gen_audio_file(
path, sample_rate, num_channels=2,
compression=compression)
expected, _ = sox_io_backend.load(path)
with open(path, 'rb') as file_:
fileobj = CloggedFileObj(io.BytesIO(file_.read()))
found, sr = sox_io_backend.load(fileobj, format=format_)
assert sr == sample_rate
self.assertEqual(expected, found)
def test_tarfile(self, ext, compression):
"""Loading compressed audio via file-like object returns the same result as via file path."""
sample_rate = 16000
format_ = ext if ext in ['mp3'] else None
audio_file = f'test.{ext}'
audio_path = self.get_temp_path(audio_file)
archive_path = self.get_temp_path('archive.tar.gz')
sox_utils.gen_audio_file(
audio_path, sample_rate, num_channels=2,
compression=compression)
expected, _ = sox_io_backend.load(audio_path)
with tarfile.TarFile(archive_path, 'w') as tarobj:
tarobj.add(audio_path, arcname=audio_file)
with tarfile.TarFile(archive_path, 'r') as tarobj:
fileobj = tarobj.extractfile(audio_file)
found, sr = sox_io_backend.load(fileobj, format=format_)
assert sr == sample_rate
self.assertEqual(expected, found)
def _gen_file(self,
ext,
dtype,
sample_rate,
num_channels,
num_frames,
*,
comments=None):
path = self.get_temp_path(f'test.{ext}')
bit_depth = sox_utils.get_bit_depth(dtype)
duration = num_frames / sample_rate
comment_file = self._gen_comment_file(comments) if comments else None
sox_utils.gen_audio_file(
path,
sample_rate,
num_channels=num_channels,
encoding=sox_utils.get_encoding(dtype),
bit_depth=bit_depth,
duration=duration,
comment_file=comment_file,
)
return path
def assert_format(
self,
format: str,
sample_rate: float,
num_channels: int,
compression: float = None,
bit_depth: int = None,
duration: float = 1,
normalize: bool = True,
encoding: str = None,
atol: float = 4e-05,
rtol: float = 1.3e-06,
):
"""`sox_io_backend.load` can load given format correctly.
file encodings introduce delay and boundary effects so
we create a reference wav file from the original file format
x
|
| 1. Generate given format with Sox
|
v 2. Convert to wav with Sox
given format ----------------------> wav
| |
| 3. Load with torchaudio | 4. Load with scipy
| |
v v
tensor ----------> x <----------- tensor
5. Compare
Underlying assumptions are;
i. Conversion of given format to wav with Sox preserves data.
ii. Loading wav file with scipy is correct.
By combining i & ii, step 2. and 4. allows to load reference given format
data without using torchaudio
"""
path = self.get_temp_path(f'1.original.{format}')
ref_path = self.get_temp_path('2.reference.wav')
# 1. Generate the given format with sox
sox_utils.gen_audio_file(
path,
sample_rate,
num_channels,
encoding=encoding,
compression=compression,
bit_depth=bit_depth,
duration=duration,
)
# 2. Convert to wav with sox
wav_bit_depth = 32 if bit_depth == 24 else None # for 24-bit wav
sox_utils.convert_audio_file(path, ref_path, bit_depth=wav_bit_depth)
# 3. Load the given format with torchaudio
data, sr = sox_io_backend.load(path, normalize=normalize)
# 4. Load wav with scipy
data_ref = load_wav(ref_path, normalize=normalize)[0]
# 5. Compare
assert sr == sample_rate
self.assertEqual(data, data_ref, atol=atol, rtol=rtol)
