weight-post.cc File Reference

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

Include dependency graph for weight-post.cc:

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

Function Documentation

main()

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

Definition at line 26 of file weight-post.cc.

References VectorBase< Real >::Dim(), SequentialTableReader< Holder >::Done(), ParseOptions::GetArg(), RandomAccessTableReader< Holder >::HasKey(), rnnlm::i, rnnlm::j, KALDI_LOG, KALDI_WARN, SequentialTableReader< Holder >::Key(), SequentialTableReader< Holder >::Next(), ParseOptions::NumArgs(), ParseOptions::PrintUsage(), ParseOptions::Read(), ParseOptions::Register(), RandomAccessTableReader< Holder >::Value(), SequentialTableReader< Holder >::Value(), and TableWriter< Holder >::Write().

                                 {
  try {
    using namespace kaldi;
    typedef kaldi::int32 int32;

    int32 length_tolerance = 2;

    const char *usage =
        "Takes archives (typically per-utterance) of posteriors and per-frame weights,\n"
        "and weights the posteriors by the per-frame weights\n"
        "\n"
        "Usage: weight-post <post-rspecifier> <weights-rspecifier> <post-wspecifier>\n";

    ParseOptions po(usage);

    po.Register("length-tolerance", &length_tolerance,
                "Tolerate this many frames of length mismatch between "
                "posteriors and weights");

    po.Read(argc, argv);

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

    std::string post_rspecifier = po.GetArg(1),
        weights_rspecifier = po.GetArg(2),
        post_wspecifier = po.GetArg(3);

    SequentialPosteriorReader posterior_reader(post_rspecifier);
    RandomAccessBaseFloatVectorReader weights_reader(weights_rspecifier);
    PosteriorWriter post_writer(post_wspecifier);

    int32 num_done = 0, num_err = 0;

    for (; !posterior_reader.Done(); posterior_reader.Next()) {
      std::string key = posterior_reader.Key();
      Posterior post  = posterior_reader.Value();
      if (!weights_reader.HasKey(key)) {
        KALDI_WARN << "No weights for utterance " << key;
        num_err++;
        continue;
      }
      const Vector<BaseFloat> &weights = weights_reader.Value(key);
      if (std::abs(weights.Dim() - static_cast<int32>(post.size())) > 
          length_tolerance) {
        KALDI_WARN << "Weights for utterance " << key
                   << " have wrong size, " << weights.Dim()
                   << " vs. " << post.size();
        num_err++;
        continue;
      }
      for (size_t i = 0; i < post.size(); i++) {
        if (weights(i) == 0.0) post[i].clear();
        for (size_t j = 0; j < post[i].size(); j++)
          post[i][j].second *= i < weights.Dim() ? weights(i) : 0.0;
      }
      post_writer.Write(key, post);
      num_done++;
    }
    KALDI_LOG << "Scaled " << num_done << " posteriors; errors on " << num_err;
    return (num_done != 0 ? 0 : 1);
  } catch(const std::exception &e) {
    std::cerr << e.what();
    return -1;
  }
}