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#ifndef CTC_BEAM_SEARCH_DECODER_H_
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#define CTC_BEAM_SEARCH_DECODER_H_
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#include <vector>
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#include <string>
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#include <utility>
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#include "scorer.h"
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/* CTC Beam Search Decoder, the interface is consistent with the
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* original decoder in Python version.
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* Parameters:
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* probs_seq: 2-D vector that each element is a vector of probabilities
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* over vocabulary of one time step.
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* beam_size: The width of beam search.
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* vocabulary: A vector of vocabulary.
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* blank_id: ID of blank.
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* cutoff_prob: Cutoff probability of pruning
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* ext_scorer: External scorer to evaluate a prefix.
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* nproc: Whether this function used in multiprocessing.
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* Return:
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* A vector that each element is a pair of score and decoding result,
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* in desending order.
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*/
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std::vector<std::pair<double, std::string> >
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ctc_beam_search_decoder(std::vector<std::vector<double> > probs_seq,
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int beam_size,
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std::vector<std::string> vocabulary,
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int blank_id,
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double cutoff_prob=1.0,
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Scorer *ext_scorer=NULL,
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bool nproc=false
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);
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#endif // CTC_BEAM_SEARCH_DECODER_H_
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