o æS™i‘ã@sDddlmZddlmZddlZddlmZeGdd„deƒƒZdS)é)Ú dataclass)ÚOptionalN)ÚAudioTransformc@sXeZdZUdZdZeed<dZeed<dZ eed<de j d e d e j fd d „Z d d„ZdS)ÚClippingaO Apply clipping to audio signal. This augmentation simulates the effect of clipping that occurs when audio levels exceed the dynamic range of recording equipment or when audio is amplified beyond its limits. Clips input signal to [-1, 1] range. :param gain_db: The amount of gain in decibels to apply before clipping (and to revert back to original level after). :param hard: If True, apply hard clipping (sharp cutoff); otherwise, apply soft clipping (saturation). :param normalize: If True, normalize the input signal to 0 dBFS before applying clipping. FÚhardgÚgain_dbTÚ normalizeÚsamplesÚ sampling_rateÚreturncCs°t t |¡¡}|dksdt |¡dkr| ¡S|jr ||}t|jƒdkr2d|jd}||}|jr=t |dd¡}nt  |¡}t|jƒdkrM||}|jrT||}| ¡S) Nréi ÿÿÿgš™™™™™¹?é g4@gð¿gð?) ÚnpÚmaxÚabsÚlog10ÚcopyrrrÚclipÚtanh)Úselfr r Úmax_peak_amplitudeÚ gain_linearÚsaturated_samples©rúP/home/ubuntu/.local/lib/python3.10/site-packages/lhotse/augmentation/clipping.pyÚ__call__s  zClipping.__call__cCs||fS)zb Clipping doesn't change the timing of the audio, so timestamps remain unchanged. r)rÚoffsetÚdurationr rrrÚreverse_timestamps?szClipping.reverse_timestampsN)Ú__name__Ú __module__Ú __qualname__Ú__doc__rÚboolÚ__annotations__rÚfloatrrÚndarrayÚintrrrrrrr s   þý ü #r) Ú dataclassesrÚtypingrÚnumpyrÚlhotse.augmentation.transformrrrrrrÚs