o 7wih@sJddlmZddlmZddlmZddlmZmZm Z m Z ddl m Z ddl mZmZmZmZddlZddlZddlmZddlmZdd lmZdd lmZd#d d Zd dfdedeedeefddZde defddZ!dede fddZ"  d$dej#dee efdedeedeedeed eej#dej#fd!d"Z$dS)%)CounterFractionreduce)chaincountislicerepeat)log2)CallableListOptionalUnionN)version)primespadc #s|r tt|\}dd}t|}tt|t||}t||kr(dS tfdd|DVttt ||tt |t|D] \}}|||krSnqGdS||d}tt |||t|||dD]\}}|||<qmq))NcSsttt||SN)r from_iterablemapr )icrS/home/ubuntu/sommelier/.venv/lib/python3.10/site-packages/torch_pitch_shift/main.pysz2_combinations_without_repetition..Tc3s|]}|VqdSrr).0rvaluesrr sz3_combinations_without_repetition..) zipritemslenlistr rtuplereversedrange) riterablercountsfnindicesrjrrr _combinations_without_repetitions& ,  * r/cCs|dko |dko |dkS)Ng?r r)xrrrr(sr sample_rate conditionreturncCst}t|}g}tdt|dD]}|ddt||dDq|D]}|D]}t||}||r:||q*q&t |S)a Search for pitch-shift targets that can be computed quickly for a given sample rate. Parameters ---------- sample_rate: int The sample rate of an audio clip. condition: Callable [optional] A function to validate fast shift ratios. Default is `lambda x: x >= 0.5 and x <= 2 and x != 1` (between -1 and +1 octaves). Returns ------- output: List[Fraction] A list of fast pitch-shift target ratios r cSsg|] }tdd|qS)cSs||Srr)r1yrrrr@sz,get_fast_shifts...r)rr1rrr ?s z#get_fast_shifts..)r)) setrfactorsr'r#extendr/raddr$)r2r3 fast_shiftsr8productsrr.r+rrrget_fast_shifts&s"    r= semitonescCstd|dS)z Convert semitonal shifts into ratios. Parameters ---------- semitones: float The number of semitones for a desired shift. Returns ------- output: Fraction A Fraction indicating a pitch shift ratio @(@r)r>rrrsemitones_to_ratioLrAratiocCstdt|S)z Convert rational shifts to semitones. Parameters ---------- ratio: Fraction The ratio for a desired shift. Returns ------- output: float The magnitude of a pitch shift in semitones r@)floatr )rCrrrratio_to_semitones]rBrE inputshiftbins_per_octaven_fft hop_lengthwindowcCsp|s|d}|s |d}|durt|}||j}|j\}}} t|ts.dt||}t |t |||j} |} | ||| } t tjt dk} tj| ||| |dd} tjtd|| jd |d |j} | | } tj| d |||d } | | } ~ ~ | jd|jd kr| ddd|jd f} nt| d |jd | jdd d fd } | ||| } | S)a Shift the pitch of a batch of waveforms by a given amount. Parameters ---------- input: torch.Tensor [shape=(batch_size, channels, samples)] Input audio clips of shape (batch_size, channels, samples) shift: float OR Fraction `float`: Amount to pitch-shift in # of bins. (1 bin == 1 semitone if `bins_per_octave` == 12) `Fraction`: A `fractions.Fraction` object indicating the shift ratio. Usually an element in `get_fast_shifts()`. sample_rate: int The sample rate of the input audio clips. bins_per_octave: int [optional] Number of bins per octave. Default is 12. n_fft: int [optional] Size of FFT. Default is `sample_rate // 64`. hop_length: int [optional] Size of hop length. Default is `n_fft // 32`. window: torch.Tensor [optional] A window tensor for the STFT. Default is a tensor of ones. Returns ------- output: torch.Tensor [shape=(batch_size, channels, samples)] The pitch-shifted batch of audio clips @ Nr?z0.11.0)return_complexrL)N.r r0) fixed_raten_freqrKr)rLr)torchonestodeviceshape isinstancerrDTResampleintreshaperparse torchaudio __version__stft TimeStretchistftr)rGrHr2rIrJrKrL batch_sizechannelssamples resampleroutputv011 stretcherrrr pitch_shiftns>$    $ri)NNN)rFrrN)% collectionsr fractionsr functoolsr itertoolsrrr r mathr typingr r rrrRr]torchaudio.transforms transformsrX packagingrprimePyrtorch.nn.functionalrr/rZr=rDrArETensorrirrrrsX         &