o Si8 @sddlZddlmZmZddlmZmZmZddlZ ddl Z ddl m Z ddl mZmZmZeGddde Z dd e jd ed ed e jfd dZdS)N)asdict dataclass)OptionalTupleUnion)AudioTransform)EPSILONSecondsis_module_availablec @sheZdZUdZeed<deeje j fde dejfddZ de d ee de dee ee ffd d Zd S) LoudnessNormalizationz` Loudness normalization based on pyloudnorm: https://github.com/csteinmetz1/pyloudnorm. targetsamples sampling_ratereturncCs*t|r |}t||j|d}|S)N)r r)torch is_tensorcpunumpynormalize_loudnessr )selfr r augmentedrP/home/ubuntu/.local/lib/python3.10/site-packages/lhotse/augmentation/loudness.py__call__s  zLoudnessNormalization.__call__offsetdurationcCs||fS)Nr)rrrrrrrreverse_timestampssz(LoudnessNormalization.reverse_timestampsN)__name__ __module__ __qualname____doc__float__annotations__rnpndarrayrTensorintrr rrrrrrrr s&   r >audior rrcCstdstdddl}|jdksJd|j|jd|}|j|td|td }||j }t t d |j |j ||}Wd|j S1sQwY|j S) a Applies pyloudnorm based loudness normalization to the input audio. The input audio can have up to 5 channels, with the following order: [left, right, center, left_surround, right_surround] :param audio: the input audio, expected to be 2D with shape (channels, samples). :param target: the target loudness in LUFS. :param sampling_rate: the sampling rate of the audio. :return: the loudness normalized audio. pyloudnormz>Please install pyloudnorm first using 'pip install pyloudnorm'rNzExpected 2D audio shape, got: g?) block_sizeignore)r ImportErrorr)ndimshapeMeterminrintegrated_loudnessTwarningscatch_warnings simplefilter normalizeloudness)r(r rpylnrmeterr9loudness_normalized_audiorrrr$s$    r)r')r5 dataclassesrrtypingrrrrr#rlhotse.augmentation.transformr lhotse.utilsrr r r r$r!r&rrrrrs&