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