o Siv @s^ddlZddlZddlmZmZmZmZddlmZddl m Z ddl m Z GdddZ dS)N)LiteralOptionalTupleUnion)CutSet) resolve_seed)Decibelsc@seZdZdZ      ddedeeeeeeffd e d e d e d ee e d e jfde ddfddZdedefddZddZdS)CutMixz A transform for batches of cuts (CutSet's) that stochastically performs noise augmentation with a constant or varying SNR.  ?TF*cutssnrppad_to_longest preserve_idseed)trng randomizedrandom_mix_offsetreturnNcCsL||_t|jdkrtd||_||_||_||_||_d|_ ||_ dS)a CutMix's constructor. :param cuts: a ``CutSet`` containing augmentation data, e.g. noise, music, babble. :param snr: either a float, a pair (range) of floats, or ``None``. It determines the SNR of the speech signal vs the noise signal that's mixed into it. When a range is specified, we will uniformly sample SNR in that range. When it's ``None``, the noise will be mixed as-is -- i.e. without any level adjustment. Note that it's different from ``snr=0``, which will adjust the noise level so that the SNR is 0. :param pad_to_longest: when `True`, each processed :class:`CutSet` will be padded with noise to match the duration of the longest Cut in a batch. :param preserve_id: When ``True``, preserves the IDs the cuts had before augmentation. Otherwise, new random IDs are generated for the augmented cuts (default). :param seed: an optional int or "trng". Random seed for choosing the cuts to mix and the SNR. If "trng" is provided, we'll use the ``secrets`` module for non-deterministic results on each iteration. You can also directly pass a ``random.Random`` instance here. :param random_mix_offset: an optional bool. When ``True`` and the duration of the to be mixed in cut in longer than the original cut, select a random sub-region from the to be mixed in cut. rzEEmpty CutSet in CutMix transform: it'll act as an identity transform.N) rlenwarningswarnrrrrrrngr)selfrrrrrrrrU/home/ubuntu/.local/lib/python3.10/site-packages/lhotse/dataset/cut_transforms/mix.py__init__s zCutMix.__init__c Csft|jdkr |S||jrtdd|Dnd}|j|j||j|j|jr)dnd|j |j d S)Nrcss|]}|jVqdSN)duration).0crrr Dsz"CutMix.__call__..left)rr"rmix_probrrr) rr_lazy_rng_initrmaxmixrrrrrto_eager)rrmaybe_max_durationrrr__call__;s  zCutMix.__call__cCs>|jdurdSt|jtjr|j|_dStt|j|_dSr!)r isinstancerrandomRandomr)rrrrr(Ps  zCutMix._lazy_rng_init)r r TFrF)__name__ __module__ __qualname____doc__rrrrrfloatboolintrr/r0r r-r(rrrrr s6 + r )r/rtypingrrrrlhotserlhotse.dataset.dataloadingr lhotse.utilsrr rrrrs