o °©iRã@s‚dZddlmZddlZddlZddlmZmZmZdej defdd„Z dej d e defd d „Z ddej d ee defd d „Z dS)z( Convert graphs between k2 and OpenFst. é)ÚOptionalN)ÚStdArcÚ StdVectorFstÚ SymbolTableÚfsaÚreturncCsF| d¡}t|jƒdksJdƒ‚d|j ¡}|j d¡}|j d¡}| ¡d}|dd…|dd… ¡}| ¡}t ƒ}|  |¡t |ƒD]}|  ¡} | |ksSJ‚|  |||¡qG|j ¡} t |ƒD]"}| | ¡\} } } }| dkrwd} t| | ||| d}| | |¡qed|_| |dd¡t|d ƒr¡t |j ¡¡|_|S) z²Convert an acceptor in k2 format to a one in OpenFst format. Args: fsa: An acceptor in k2 format. Returns: Return an acceptor in OpenFst format. ÚcpuéúFsaVec is not supportedéÿÿÿÿéNr©ÚilabelÚolabelÚweightÚ nextstateÚ labels_sym)ÚtoÚlenÚshapeÚscoresÚtolistÚarcsÚ row_splitsÚrow_idsÚnumelrÚreserve_statesÚrangeÚ add_stateÚ reserve_arcsÚvaluesrÚadd_arcÚstartÚ set_finalÚhasattrrÚfrom_strrÚto_strÚ input_symbols)rrrrÚ num_statesÚarcs_per_stateÚnum_arcsÚfstÚiÚsrÚsrcÚdstÚlabelÚ_Úarc©r3úO/home/ubuntu/.local/lib/python3.10/site-packages/kaldifst/utils/k2_converter.pyÚ_k2_acceptor_to_openfst s8          ÿ r5ÚolabelscCsàt||ƒsJ‚tt||ƒtjƒrtj||gd}| d¡}t|jƒdks(Jdƒ‚d|j   ¡}|j   d¡}|j   d¡}t||ƒ}t|tjƒsHJ‚|  ¡}| ¡d}|dd…|dd…  ¡}| ¡}tƒ} |  |¡t|ƒD]} |  ¡} | | ks|J‚|  | || ¡qp|j  ¡} t|ƒD]0} | |   ¡\} }}}|| }|dkr®d}|dks¬J|ƒ‚d}t|||| |d }|  | |¡qŽd| _|  |dd¡t|d ƒrØt |j ¡¡| _t||›d ƒrît t||›d ƒ ¡¡| _ | S) a2Convert a transducer in k2 format to an FST in OpenFst format Args: fsa: The input FSA. olabels: It specifies which attribute from `fsa` contains output labels. In most cases, `olabels` is `aux_labels`. Returns: Return a transducer in OpenFst format. )Úragged_attribute_namesrr r r r Nrr rÚ_sym)!r$Ú isinstanceÚgetattrÚk2Ú RaggedTensorÚexpand_ragged_attributesrrrrrrrrÚtorchÚTensorrrrrrrr rr!r"r#rr%rr&r'Úoutput_symbols)rr6rrrÚ output_labelsr(r)r*r+r,r-rr.r/rr1rr2r3r3r4Ú_k2_transducer_to_openfst>sX           ü ÿrBcCs|durt|ƒSt||ƒS)aConvert an FSA in k2 format to an FSA in OpenFst format. Args: fsa: An FSA from k2. Note: Both acceptors and transducers are represented as `k2.Fsa`. olabels: If it is `None`, we assume the input `fsa` is an acceptor. If not `None`, we assume `getattr(fsa, olabel)` contains the output labels of arcs. In general, it is calles `aux_labels` in k2. Return: Return an FST in OpenFst format. TODO: Also attach symbols, if there are any. N)r5rB)rr6r3r3r4Ú k2_to_openfstˆs rC)N)Ú__doc__Útypingrr;r>Ú _kaldifstrrrÚFsar5ÚstrrBrCr3r3r3r4Ús 1"J