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T4
File size: 2,345 Bytes
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import os
import soundfile
import librosa
import resampy
def is_wav_file(filename):
# 获取文件扩展名
file_extension = os.path.splitext(filename)[1]
# 判断文件扩展名是否为'.wav'或'.WAV'
return file_extension.lower() == ".wav"
import numpy as np
def read_as_single_channel_16k(audio_file, def_sr, verbose=False, aim_second=None):
assert os.path.exists(audio_file), "音频文件不存在"
file_extension = os.path.splitext(audio_file)[1].lower()
if file_extension == ".mp3":
data, origin_sr = librosa.load(audio_file, sr=None)
elif file_extension in [".wav", ".flac"]:
data, origin_sr = soundfile.read(audio_file)
else:
raise Exception("不支持的文件类型:" + file_extension)
# 通道数
if len(data.shape) == 2:
left_channel = data[:, 0]
if verbose:
print("双通道文件,变为单通道")
data = left_channel
# 采样率
if origin_sr != def_sr:
data = resampy.resample(data, origin_sr, def_sr)
if verbose:
print("原始音频采样率不是16kHZ,可能会对水印性能造成影响")
sr = def_sr
audio_length_second = 1.0 * len(data) / sr
if verbose:
print("输入音频长度:%d秒" % audio_length_second)
# 判断通道数
if len(data.shape) == 2:
data = data[:, 0]
print("选取第一个通道")
if aim_second is not None:
signal = data
assert len(signal) > 0
current_second = len(signal) / sr
if current_second < aim_second:
repeat_count = int(aim_second / current_second) + 1
signal = np.repeat(signal, repeat_count)
data = signal[0:sr * aim_second]
return data, sr, audio_length_second
def read_as_single_channel(file, aim_sr):
if file.endswith(".mp3"):
data, sr = librosa.load(file, sr=aim_sr) # 这里默认就是会转换为输入的sr
else:
data, sr = soundfile.read(file)
if len(data.shape) == 2: # 双声道
data = data[:, 0] # 只要第一个声道
# 然后再切换sr,因为soundfile可能读取出一个双通道的东西
if sr != aim_sr:
data = resampy.resample(data, sr, aim_sr)
return data
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