def load_wav_file(file_path: str) -> Sample:
"""Loads a wav file and returns the corresponding Sample data object.
:param file_path: path to the wav file
:raise ValueError: on bad file rate (!= CD_QUALITY_RATE)
:returns: the associated RawSample data object
"""
# Read the .wav file
rate, data = wavfile.read(file_path)
# cut the number of data points to the chosen power of 2
data = np.array(data[:N])
if rate != CD_QUALITY_RATE:
raise ValueError(f'Invalid file rate, found {rate} Hz but '
f'expected {CD_QUALITY_RATE} Hz')
# Extract file meta data
file_name = Path(file_path).name
raw_phoneme = file_name.split('_')[0]
try:
phoneme = Phoneme(raw_phoneme.lower())
except ValueError:
raise ValueError(f'Invalid phoneme "{raw_phoneme.lower()}"')
# Instantiate the associated data object
return Sample(phoneme, file_name, data)
def __init__(self, mp4_file):
self.input_file = mp4_file
stem = Path(mp4_file).stem
self.album, self.artist, self.title = stem.split(' ')
parent = Path(mp4_file).parent
self.output_file = str(parent.joinpath(
'%s %s.m4a' % (self.artist, self.title)))
self.artwork_file = None
for ext in ('.jpg', '.png'):
imgfile = parent.joinpath(stem + ext)
if imgfile.exists():
self.artwork_file = str(imgfile)
break
if not self.artwork_file:
self.tempdir = tempfile.mkdtemp()
self.artwork_file = op.join(self.tempdir, 'artwork.jpg')
