// See www.openfst.org for extensive documentation on this weighted
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// finite-state transducer library.
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#ifndef FST_SCRIPT_DETERMINIZE_H_
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#define FST_SCRIPT_DETERMINIZE_H_
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#include <tuple>
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#include <fst/determinize.h>
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#include <fst/script/fst-class.h>
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#include <fst/script/weight-class.h>
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namespace fst {
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namespace script {
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struct DeterminizeOptions {
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const float delta;
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const WeightClass &weight_threshold;
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const int64 state_threshold;
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const int64 subsequential_label;
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const DeterminizeType det_type;
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const bool increment_subsequential_label;
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DeterminizeOptions(float delta, const WeightClass &weight_threshold,
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int64 state_threshold = kNoStateId,
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int64 subsequential_label = 0,
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DeterminizeType det_type = DETERMINIZE_FUNCTIONAL,
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bool increment_subsequential_label = false)
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: delta(delta),
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weight_threshold(weight_threshold),
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state_threshold(state_threshold),
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subsequential_label(subsequential_label),
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det_type(det_type),
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increment_subsequential_label(increment_subsequential_label) {}
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};
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using DeterminizeArgs = std::tuple<const FstClass &, MutableFstClass *,
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const DeterminizeOptions &>;
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template <class Arc>
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void Determinize(DeterminizeArgs *args) {
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using Weight = typename Arc::Weight;
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const Fst<Arc> &ifst = *(std::get<0>(*args).GetFst<Arc>());
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MutableFst<Arc> *ofst = std::get<1>(*args)->GetMutableFst<Arc>();
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const auto &opts = std::get<2>(*args);
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const auto weight_threshold = *(opts.weight_threshold.GetWeight<Weight>());
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const fst::DeterminizeOptions<Arc> detargs(opts.delta, weight_threshold,
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opts.state_threshold, opts.subsequential_label, opts.det_type,
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opts.increment_subsequential_label);
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Determinize(ifst, ofst, detargs);
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}
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void Determinize(const FstClass &ifst, MutableFstClass *ofst,
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const DeterminizeOptions &opts);
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} // namespace script
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} // namespace fst
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#endif // FST_SCRIPT_DETERMINIZE_H_
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