lattice-add-trans-probs.cc File Reference

#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "fstext/fstext-lib.h"
#include "lat/kaldi-lattice.h"
#include "lat/lattice-functions.h"
#include "hmm/transition-model.h"
#include "hmm/hmm-utils.h"

Include dependency graph for lattice-add-trans-probs.cc:

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Functions
int	main (int argc, char *argv[])

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 29 of file lattice-add-trans-probs.cc.

References kaldi::AddTransitionProbs(), fst::ConvertLattice(), SequentialTableReader< Holder >::Done(), ParseOptions::GetArg(), KALDI_LOG, SequentialTableReader< Holder >::Key(), SequentialTableReader< Holder >::Next(), ParseOptions::NumArgs(), ParseOptions::PrintUsage(), ParseOptions::Read(), kaldi::ReadKaldiObject(), ParseOptions::Register(), SequentialTableReader< Holder >::Value(), and TableWriter< Holder >::Write().

                                 {
  try {
    using namespace kaldi;
    typedef kaldi::int32 int32;
    typedef kaldi::int64 int64;
    using fst::SymbolTable;
    using fst::VectorFst;
    using fst::StdArc;

    const char *usage =
        "Add transition probabilities into graph part of lattice scores,\n"
        "controlled by options --transition-scale and --self-loop-scale, which\n"
        "for compatibility with the original graph, would normally be set to the same\n"
        "values used in graph compilatoin\n"
        "\n"
        "Usage: lattice-add-trans-probs [options] model lattice-rspecifier lattice-wspecifier\n"
        " e.g.: lattice-add-trans-probs --transition-scale=1.0 --self-loop-scale=0.1 1.mdl ark:in.lats ark:out.lats\n";

    ParseOptions po(usage);

    BaseFloat transition_scale = 1.0, self_loop_scale = 1.0;

    po.Register("transition-scale", &transition_scale,
                "Scale for transition probabilities (excluding self-loops)");
    po.Register("self-loop-scale", &self_loop_scale,
                "Probability scale for self-loop vs. non-self-loop "
                "probability mass.");

    po.Read(argc, argv);

    if (po.NumArgs() != 3) {
      po.PrintUsage();
      exit(1);
    }

    std::string
        model_rxfilename = po.GetArg(1),
        lats_rspecifier = po.GetArg(2),
        lats_wspecifier = po.GetArg(3);

    int32 n_done = 0;

    TransitionModel trans_model;

    ReadKaldiObject(model_rxfilename, &trans_model);

    SequentialLatticeReader lattice_reader(lats_rspecifier); // read as
    // regular lattice.
    CompactLatticeWriter clat_writer(lats_wspecifier); // write as compact.
    for (; !lattice_reader.Done(); lattice_reader.Next(), n_done++) {
      Lattice lat(lattice_reader.Value());
      AddTransitionProbs(trans_model, transition_scale, self_loop_scale, &lat);
      CompactLattice clat;
      ConvertLattice(lat, &clat);
      clat_writer.Write(lattice_reader.Key(), clat);
      n_done++;
    }
    KALDI_LOG << "Done adding transition probabilities to " << n_done << " lattices.";
    return (n_done != 0 ? 0 : 1);
  } catch(const std::exception &e) {
    std::cerr << e.what();
    return -1;
  }
}