def join(self, inputWavfile: wave.Wave_read, start, end):
length = end - start
if start < 0 or end < 0 or length < 0:
raise ValueError("Invalid start value was given")
params = inputWavfile.getparams()
if not self.__compareParams(params):
raise ValueError("File can not be joined due to inappropriate parameters")
else:
inputWavfile.setpos(int(start * self.frameRate))
data = inputWavfile.readframes(int(length * self.frameRate))
self.__output.writeframes(data)
def read(file: wave.Wave_read):
"""
Reads file and produces an audiodata from its data
Returns that audiodata
"""
params = file.getparams()
frames_number = file.getnframes()
frames = file.readframes(frames_number)
characters_per_frame = len(frames) // frames_number
framesdata = split_frames_into_sounds(frames, characters_per_frame)
return AudioData(params, framesdata)
def trim(sound_file: wave.Wave_read, ratio, new_file_path):
"""
Creates a new trimmed file out of the given one
:param sound_file: Source file
:param ratio: The ratio by which the function trims
:param new_file_path: Path to the output file
"""
frame_count = sound_file.getnframes()
target_frame_count = int(frame_count * ratio)
new_frames = sound_file.readframes(target_frame_count)
new_file = wave.open(new_file_path, 'w')
new_file.setparams(sound_file.getparams())
new_file.writeframes(new_frames)
new_file.close()
