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| import shutil | |
| import wave | |
| import pysilk | |
| from pydub import AudioSegment | |
| sil_supports=[8000, 12000, 16000, 24000, 32000, 44100, 48000] # slk转wav时，支持的采样率 | |
| def find_closest_sil_supports(sample_rate): | |
| """ | |
| 找到最接近的支持的采样率 | |
| """ | |
| if sample_rate in sil_supports: | |
| return sample_rate | |
| closest = 0 | |
| mindiff = 9999999 | |
| for rate in sil_supports: | |
| diff = abs(rate - sample_rate) | |
| if diff < mindiff: | |
| closest = rate | |
| mindiff = diff | |
| return closest | |
| def get_pcm_from_wav(wav_path): | |
| """ | |
| 从 wav 文件中读取 pcm | |
| :param wav_path: wav 文件路径 | |
| :returns: pcm 数据 | |
| """ | |
| wav = wave.open(wav_path, "rb") | |
| return wav.readframes(wav.getnframes()) | |
| def any_to_wav(any_path, wav_path): | |
| """ | |
| 把任意格式转成wav文件 | |
| """ | |
| if any_path.endswith('.wav'): | |
| shutil.copy2(any_path, wav_path) | |
| return | |
| if any_path.endswith('.sil') or any_path.endswith('.silk') or any_path.endswith('.slk'): | |
| return sil_to_wav(any_path, wav_path) | |
| audio = AudioSegment.from_file(any_path) | |
| audio.export(wav_path, format="wav") | |
| def any_to_sil(any_path, sil_path): | |
| """ | |
| 把任意格式转成sil文件 | |
| """ | |
| if any_path.endswith('.sil') or any_path.endswith('.silk') or any_path.endswith('.slk'): | |
| shutil.copy2(any_path, sil_path) | |
| return 10000 | |
| if any_path.endswith('.wav'): | |
| return pcm_to_sil(any_path, sil_path) | |
| if any_path.endswith('.mp3'): | |
| return mp3_to_sil(any_path, sil_path) | |
| raise NotImplementedError("Not support file type: {}".format(any_path)) | |
| def mp3_to_wav(mp3_path, wav_path): | |
| """ | |
| 把mp3格式转成pcm文件 | |
| """ | |
| audio = AudioSegment.from_mp3(mp3_path) | |
| audio.export(wav_path, format="wav") | |
| def pcm_to_sil(pcm_path, silk_path): | |
| """ | |
| wav 文件转成 silk | |
| return 声音长度，毫秒 | |
| """ | |
| audio = AudioSegment.from_wav(pcm_path) | |
| rate = find_closest_sil_supports(audio.frame_rate) | |
| # Convert to PCM_s16 | |
| pcm_s16 = audio.set_sample_width(2) | |
| pcm_s16 = pcm_s16.set_frame_rate(rate) | |
| wav_data = pcm_s16.raw_data | |
| silk_data = pysilk.encode( | |
| wav_data, data_rate=rate, sample_rate=rate) | |
| with open(silk_path, "wb") as f: | |
| f.write(silk_data) | |
| return audio.duration_seconds * 1000 | |
| def mp3_to_sil(mp3_path, silk_path): | |
| """ | |
| mp3 文件转成 silk | |
| return 声音长度，毫秒 | |
| """ | |
| audio = AudioSegment.from_mp3(mp3_path) | |
| rate = find_closest_sil_supports(audio.frame_rate) | |
| # Convert to PCM_s16 | |
| pcm_s16 = audio.set_sample_width(2) | |
| pcm_s16 = pcm_s16.set_frame_rate(rate) | |
| wav_data = pcm_s16.raw_data | |
| silk_data = pysilk.encode(wav_data, data_rate=rate, sample_rate=rate) | |
| # Save the silk file | |
| with open(silk_path, "wb") as f: | |
| f.write(silk_data) | |
| return audio.duration_seconds * 1000 | |
| def sil_to_wav(silk_path, wav_path, rate: int = 24000): | |
| """ | |
| silk 文件转 wav | |
| """ | |
| wav_data = pysilk.decode_file(silk_path, to_wav=True, sample_rate=rate) | |
| with open(wav_path, "wb") as f: | |
| f.write(wav_data) | |