// See www.openfst.org for extensive documentation on this weighted
|
// finite-state transducer library.
|
//
|
// Generates a random FST according to a class-specific transition model.
|
|
#include <cstdlib>
|
#include <cstring>
|
#include <ctime>
|
#include <memory>
|
#include <string>
|
|
#include <fst/flags.h>
|
#include <fst/log.h>
|
#include <fst/extensions/compress/randmod.h>
|
#include <fst/fstlib.h>
|
|
DEFINE_int32(seed, time(0), "Random seed");
|
DEFINE_int32(states, 10, "# of states");
|
DEFINE_int32(labels, 2, "# of labels");
|
DEFINE_int32(classes, 1, "# of probability distributions");
|
DEFINE_bool(transducer, false, "Output a transducer");
|
DEFINE_bool(weights, false, "Output a weighted FST");
|
|
int main(int argc, char **argv) {
|
using fst::StdVectorFst;
|
using fst::StdArc;
|
using fst::TropicalWeight;
|
using fst::WeightGenerate;
|
|
string usage = "Generates a random FST.\n\n Usage: ";
|
usage += argv[0];
|
usage += "[out.fst]\n";
|
|
std::set_new_handler(FailedNewHandler);
|
SET_FLAGS(usage.c_str(), &argc, &argv, true);
|
if (argc > 2) {
|
ShowUsage();
|
return 1;
|
}
|
|
string out_name = (argc > 1 && (strcmp(argv[1], "-") != 0)) ? argv[1] : "";
|
|
srand(FLAGS_seed);
|
|
int num_states = (rand() % FLAGS_states) + 1; // NOLINT
|
int num_classes = (rand() % FLAGS_classes) + 1; // NOLINT
|
int num_labels = (rand() % FLAGS_labels) + 1; // NOLINT
|
|
StdVectorFst fst;
|
using TropicalWeightGenerate = WeightGenerate<TropicalWeight>;
|
std::unique_ptr<TropicalWeightGenerate> generate(FLAGS_weights ?
|
new TropicalWeightGenerate(false) : nullptr);
|
fst::RandMod<StdArc, TropicalWeightGenerate> rand_mod(num_states,
|
num_classes, num_labels, FLAGS_transducer, generate.get());
|
rand_mod.Generate(&fst);
|
fst.Write(out_name);
|
return 0;
|
}
|
