// gmmbin/gmm-global-sum-accs.cc
  // Copyright 2009-2011  Saarland University;  Microsoft Corporation
  
  // See ../../COPYING for clarification regarding multiple authors
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //  http://www.apache.org/licenses/LICENSE-2.0
  //
  // THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
  // WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
  // MERCHANTABLITY OR NON-INFRINGEMENT.
  // See the Apache 2 License for the specific language governing permissions and
  // limitations under the License.
  
  #include "util/common-utils.h"
  #include "gmm/full-gmm.h"
  #include "gmm/mle-full-gmm.h"
  
  
  int main(int argc, char *argv[]) {
    try {
      typedef kaldi::int32 int32;
  
      const char *usage =
          "Sum multiple accumulated stats files for diagonal-covariance GMM "
          "training.
  "
          "Usage: gmm-global-sum-accs [options] stats-out stats-in1 stats-in2 ...
  ";
  
      bool binary = true;
      kaldi::ParseOptions po(usage);
      po.Register("binary", &binary, "Write output in binary mode");
      po.Read(argc, argv);
  
      if (po.NumArgs() < 2) {
        po.PrintUsage();
        exit(1);
      }
  
      std::string stats_out_filename = po.GetArg(1);
      kaldi::AccumDiagGmm gmm_accs;
  
      for (int i = 2, max = po.NumArgs(); i <= max; i++) {
        std::string stats_in_filename = po.GetArg(i);
        bool binary_read;
        kaldi::Input ki(stats_in_filename, &binary_read);
        gmm_accs.Read(ki.Stream(), binary_read, true /*add read values*/);
      }
  
      // Write out the accs
      {
        kaldi::Output ko(stats_out_filename, binary);
        gmm_accs.Write(ko.Stream(), binary);
      }
  
      KALDI_LOG << "Written stats to " << stats_out_filename;
    } catch(const std::exception &e) {
      std::cerr << e.what() << '
  ';
      return -1;
    }
  }