nnet3-discriminative-merge-egs.cc File Reference

#include "base/kaldi-common.h"
#include "util/common-utils.h"
#include "hmm/transition-model.h"
#include "nnet3/nnet-discriminative-example.h"

Include dependency graph for nnet3-discriminative-merge-egs.cc:

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

Function Documentation

main()

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

Definition at line 27 of file nnet3-discriminative-merge-egs.cc.

References DiscriminativeExampleMerger::AcceptExample(), ExampleMergingConfig::ComputeDerived(), SequentialTableReader< Holder >::Done(), DiscriminativeExampleMerger::ExitStatus(), DiscriminativeExampleMerger::Finish(), ParseOptions::GetArg(), SequentialTableReader< Holder >::Next(), ParseOptions::NumArgs(), ParseOptions::PrintUsage(), ParseOptions::Read(), ExampleMergingConfig::Register(), and SequentialTableReader< Holder >::Value().

                                 {
  try {
    using namespace kaldi;
    using namespace kaldi::nnet3;
    typedef kaldi::int32 int32;
    typedef kaldi::int64 int64;

    const char *usage =
        "This copies nnet3 discriminative training examples from input to output, merging them\n"
        "into composite examples.  The --minibatch-size option controls how many egs\n"
        "are merged into a single output eg.\n"
        "\n"
        "Usage:  nnet3-discriminative-egs [options] <egs-rspecifier> <egs-wspecifier>\n"
        "e.g.\n"
        "nnet3-discriminative-merge-egs --minibatch-size=128 ark:1.degs ark:- | nnet3-discriminative-train ... \n"
        "See also nnet3-discriminative-copy-egs\n";

    ExampleMergingConfig merging_config("64");  // 64 is default minibatch size.

    ParseOptions po(usage);
    merging_config.Register(&po);

    po.Read(argc, argv);

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

    std::string examples_rspecifier = po.GetArg(1),
        examples_wspecifier = po.GetArg(2);

    SequentialNnetDiscriminativeExampleReader example_reader(examples_rspecifier);
    NnetDiscriminativeExampleWriter example_writer(examples_wspecifier);

    merging_config.ComputeDerived();
    DiscriminativeExampleMerger merger(merging_config, &example_writer);
    for (; !example_reader.Done(); example_reader.Next()) {
      const NnetDiscriminativeExample &cur_eg = example_reader.Value();
      merger.AcceptExample(new NnetDiscriminativeExample(cur_eg));
    }
    // the merger itself prints the necessary diagnostics.
    merger.Finish();
    return merger.ExitStatus();
  } catch(const std::exception &e) {
    std::cerr << e.what() << '\n';
    return -1;
  }
}