feat-to-post.cc File Reference

#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "hmm/posterior.h"

Include dependency graph for feat-to-post.cc:

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Functions
int	main (int argc, char *argv[])
	Converts features into posterior format, which is the generic format of NN training targets in 'nnet1'. More...

Function Documentation

main()

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

Converts features into posterior format, which is the generic format of NN training targets in 'nnet1'.

Definition at line 27 of file feat-to-post.cc.

References rnnlm::d, SequentialTableReader< Holder >::Done(), ParseOptions::GetArg(), KALDI_ASSERT, KALDI_LOG, SequentialTableReader< Holder >::Key(), SequentialTableReader< Holder >::Next(), ParseOptions::NumArgs(), MatrixBase< Real >::NumCols(), MatrixBase< Real >::NumRows(), ParseOptions::PrintUsage(), ParseOptions::Read(), SequentialTableReader< Holder >::Value(), and TableWriter< Holder >::Write().

                                 {
  using namespace kaldi;
  typedef kaldi::int32 int32;
  try {
    const char *usage =
      "Convert features into posterior format, which is the generic format \n"
      "of NN training targets in Karel's nnet1 tools.\n"
      "(speed is not an issue for reasonably low NN-output dimensions)\n"
      "Usage:  feat-to-post [options] feat-rspecifier posteriors-wspecifier\n"
      "e.g.:\n"
      " feat-to-post scp:feats.scp ark:feats.post\n";

    ParseOptions po(usage);

    po.Read(argc, argv);

    if (po.NumArgs() != 2) {
      po.PrintUsage();
      exit(1);
    }

    std::string feats_rspecifier = po.GetArg(1);
    std::string posteriors_wspecifier = po.GetArg(2);

    int32 num_done = 0;
    SequentialBaseFloatMatrixReader feats_reader(feats_rspecifier);
    PosteriorWriter posterior_writer(posteriors_wspecifier);

    for (; !feats_reader.Done(); feats_reader.Next()) {
      num_done++;
      const Matrix<BaseFloat> &mat = feats_reader.Value();
      int32 num_frames = mat.NumRows(),
        num_dims = mat.NumCols();
      // Posterior is vector<vector<pair<int32, BaseFloat> > >
      Posterior post(num_frames);
      // Fill posterior with matrix values,
      for (int32 f = 0; f < num_frames; f++) {
        for (int32 d = 0; d < num_dims; d++) {
          post[f].push_back(std::make_pair(d, mat(f, d)));
        }
        KALDI_ASSERT(post[f].size() == num_dims);
      }
      // Store
      posterior_writer.Write(feats_reader.Key(), post);
    }
    KALDI_LOG << "Converted " << num_done << " alignments.";
    return (num_done != 0 ? 0 : 1);
  } catch(const std::exception &e) {
    std::cerr << e.what();
    return -1;
  }
}