o soi (@s<ddlZddlZddlmZddlmZGdddeZdS)N)util) IIRfilterc@sLeZdZdZdddZddZd d Zd d Zed dZ e j ddZ dS)Metera Meter object which defines how the meter operates Defaults to the algorithm defined in ITU-R BS.1770-4. Parameters ---------- rate : float Sampling rate in Hz. filter_class : str Class of weighting filter used. - 'K-weighting' - 'Fenton/Lee 1' - 'Fenton/Lee 2' - 'Dash et al.' - 'DeMan' block_size : float Gating block size in seconds. K-weighting皙??cCs"||_||_||_||_g|_dSN)rate filter_class block_sizeoverlapblockwise_loudness)selfr r r r rD/home/ubuntu/.local/lib/python3.10/site-packages/pyloudnorm/meter.py__init__s  zMeter.__init__c s,|}t||j|j|jdkrt||jddf}|jd|jd}|j D]\}}t D]}| |dd|f|dd|f<q4q,gd|j}d|j }d|} ||j} tt| ||| d} td| } tj| fdt D]8} | D]3}t||| |j}t||| d|j}d||jtt|||| f| |f<qqttjdtd fd d | D}Wdn1swY||_fd d t|Dttjdtd fd d t DWdn 1swYddttfdd t Ddfdd t|Dt!tjdtd ttfdd t DWdn 1sawYtjddddttfdd t D}Wd|S1swY|S)a Measure the integrated gated loudness of a signal. Uses the weighting filters and block size defined by the meter the integrated loudness is measured based upon the gating algorithm defined in the ITU-R BS.1770-4 specification. Input data must have shape (samples, ch) or (samples,) for mono audio. Supports up to 5 channels and follows the channel ordering: [Left, Right, Center, Left surround, Right surround] Params ------- data : ndarray Input multichannel audio data. Returns ------- LUFS : float Integrated gated loudness of the input measured in dB LUFS. rrN)?rr(\?rgQr)shapeignore)categoryc s:g|]ddttfddtDqS)&1$@cs g|] }||fqSrr.0i)Gjzrr Ys 8Meter.integrated_loudness...)nplog10sumranger)r numChannelsr)rrr Ys:z-Meter.integrated_loudness..csg|] \}}|kr|qSrrrrl_j)Gamma_arrr ]c&g|]tfddDqS)cg|]}|fqSrrrrrrrrr br!r"meanr&J_grrrr b&rrcg|] }||qSrrrr z_avg_gatedrrr dr+cs$g|]\}}|kr|kr|qSrrr()r*Gamma_rrrr gs$cr,)cr-rrr.r/rrr kr0r!r1r&r3r5rr kr6)dividecr7rrrr8rrr or+)copyr valid_audior r ndimr"reshaper_filtersitemsr% apply_filterr introundarangezerosr$squarewarningscatch_warnings simplefilterRuntimeWarningr enumerater# nan_to_numarrayerrstate)rdata input_data numSamplesr filter_stagechT_gr stepT numBlocksj_rangerrluLUFSr)rr*r:r4r'rr9rintegrated_loudness!s^    $   4  0 &. zMeter.integrated_loudnessc s,|j}|j}zd|_d|_|j|dd}|||js tdddd}d }fd d |jD}t|d krBtjW||_||_St|}t t dt |d|}dt |fd d |D} t| d krvtjW||_||_St | |} t | |} | | } | W||_||_S||_||_w)a Measure the loudness range of a signal. An implementation based on the MATLAB example of TECH 3342 - LOUDNESS RANGE: A MEASURE TO SUPPLEMENT EBU R 128 LOUDNESS NORMALIZATION Input data must have shape (samples, ch) or (samples,) for mono audio. Supports up to 5 channels and follows the channel ordering: [Left, Right, Center, Left surround, Right surround] Params ------- data : ndarray Input multichannel audio data. Returns ------- LRA : float Loudness Range measure in LU. Returns NaN if the signal is too quiet to compute LRA. g@g ףp= ?g?)silence_duration_seczNo blockwise loudness foundii _csg|]}|kr|qSrrrx) ABS_THRESrrr r0z(Meter.loudness_range..rcsg|] }|kr|qSrrra) REL_THRESstl_integratedrrr r+)r r _append_silencer]r ValueErrorlenr"nanr$powerr;r# percentile) rrPoriginal_block_sizeoriginal_overlapPRC_LOWPRC_HIGHstl_absgated_vecn stl_powerstl_relgated_vec stl_perc_low stl_perc_highLRAr)rcrdrerloudness_rangessD     zMeter.loudness_rangecCs|t||j}t|}t|jdkrt||f}|St|jdkr:|jd}t||f}tj||fdd}|Std)Nrr)axiszInvalid shape for audio data)rCr r"rFrhr concatenaterg)rrPr^num_silence_samplessilencenew_audio_data num_channelsrrrrfs  zMeter._append_silencecCs|jSr ) _filter_class)rrrrr szMeter.filter_classcCsi|_||_|jdkr*tddtdd|jd|jd<tddd |jd |jd <dS|jd kr_td dtdd|jd|jd<tddd |jd |jd <tddtdd|jd|jd<dS|jdkrtddtdd|jd|jd<tddd |jd |jd <dS|jdkrtddd|jd |jd <tddd|jd|jd<dS|jdkrtddd|jd|jd<tddd|jd|jd<dS|jd krdStd!|j)"Nrg@rrxgp@ high_shelfgg?gC@ high_passz Fenton/Lee 1g@g@`@g@@peakingz Fenton/Lee 2 high_selfz Dash et al.g?gb@gݡsgrˢ E?g@@DeMangCo"@giwh-?gCxG@high_shelf_DeMangح?g^JWC@high_pass_DeMancustomzInvalid filter class:)r@rrr"sqrtr rg)rvaluerrrr s* " "& "    N)rrr) __name__ __module__ __qualname____doc__rr]rwrfpropertyr setterrrrrrs RD r) rHnumpyr"r iirfilterrobjectrrrrrs