[SPTK-CVS] SPTK4/src decimate.cc,NONE,1.1

[Takenori Y. <tak...@us...>]

Update of /cvsroot/sp-tk/SPTK4/src
In directory sfp-cvs-1.v30.ch3.sourceforge.com:/tmp/cvs-serv14231

Added Files:
	decimate.cc 
Log Message:
add decimate command

--- NEW FILE: decimate.cc ---
// ----------------------------------------------------------------- //
//             The Speech Signal Processing Toolkit (SPTK)           //
//             developed by SPTK Working Group                       //
//             http://sp-tk.sourceforge.net/                         //
// ----------------------------------------------------------------- //
//                                                                   //
//  Copyright (c) 1984-2007  Tokyo Institute of Technology           //
//                           Interdisciplinary Graduate School of    //
//                           Science and Engineering                 //
//                                                                   //
//                1996-2017  Nagoya Institute of Technology          //
//                           Department of Computer Science          //
//                                                                   //
// All rights reserved.                                              //
//                                                                   //
// Redistribution and use in source and binary forms, with or        //
// without modification, are permitted provided that the following   //
// conditions are met:                                               //
//                                                                   //
// - Redistributions of source code must retain the above copyright  //
//   notice, this list of conditions and the following disclaimer.   //
// - Redistributions in binary form must reproduce the above         //
//   copyright notice, this list of conditions and the following     //
//   disclaimer in the documentation and/or other materials provided //
//   with the distribution.                                          //
// - Neither the name of the SPTK working group nor the names of its //
//   contributors may be used to endorse or promote products derived //
//   from this software without specific prior written permission.   //
//                                                                   //
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND            //
// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,       //
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF          //
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE          //
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS //
// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,          //
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED   //
// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     //
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON //
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,   //
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY    //
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE           //
// POSSIBILITY OF SUCH DAMAGE.                                       //
// ----------------------------------------------------------------- //

#include <getopt.h>
#include <fstream>
#include <iostream>
#include <sstream>
#include <vector>

#include "sptk_utils.h"

namespace {

const int kDefaultStartIndex(0);
const int kDefaultVectorLength(1);
const int kDefaultDecimationPeriod(10);

void PrintUsage(std::ostream* stream) {
  // clang-format off
  *stream << std::endl;
  *stream << " decimate - data decimation" << std::endl;
  *stream << std::endl;
  *stream << "  usage:" << std::endl;
  *stream << "       decimate [ options ] [ infile ] > stdout" << std::endl;
  *stream << "  options:" << std::endl;
  *stream << "       -s s  : start index        [" << kDefaultStartIndex << "]" << std::endl;  // NOLINT
  *stream << "       -l l  : length of vector   [" << kDefaultVectorLength << "]" << std::endl;  // NOLINT
  *stream << "       -p p  : decimation period  [" << kDefaultDecimationPeriod << "]" << std::endl;  // NOLINT
  *stream << "       -h    : print this message" << std::endl;
  *stream << "  infile:" << std::endl;
  *stream << "       data sequence              [stdin]" << std::endl;
  *stream << "  stdout:" << std::endl;
  *stream << "       decimated data sequence" << std::endl;
  *stream << std::endl;
  *stream << " SPTK: version " << sptk::kVersion << std::endl;
  *stream << std::endl;
  // clang-format on
}

}  // namespace

int main(int argc, char* argv[]) {
  int start_index(kDefaultStartIndex);
  int vector_length(kDefaultVectorLength);
  int decimation_period(kDefaultDecimationPeriod);

  for (;;) {
    const int option_char(getopt_long(argc, argv, "s:l:p:h", NULL, NULL));
    if (-1 == option_char) break;

    switch (option_char) {
      case 's': {
        if (!sptk::ConvertStringToInteger(optarg, &start_index) ||
            start_index < 0) {
          std::ostringstream error_message;
          error_message << "The argument for the -s option must be a "
                        << "non-negative integer";
          sptk::PrintErrorMessage("decimate", error_message);
          return 1;
        }
        break;
      }
      case 'l': {
        if (!sptk::ConvertStringToInteger(optarg, &vector_length) ||
            vector_length <= 0) {
          std::ostringstream error_message;
          error_message
              << "The argument for the -l option must be a positive integer";
          sptk::PrintErrorMessage("decimate", error_message);
          return 1;
        }
        break;
      }
      case 'p': {
        if (!sptk::ConvertStringToInteger(optarg, &decimation_period) ||
            decimation_period <= 0) {
          std::ostringstream error_message;
          error_message
              << "The argument for the -p option must be a positive integer";
          sptk::PrintErrorMessage("decimate", error_message);
          return 1;
        }
        break;
      }
      case 'h': {
        PrintUsage(&std::cout);
        return 0;
      }
      default: {
        PrintUsage(&std::cerr);
        return 1;
      }
    }
  }

  // get input file
  const char* input_file((optind < argc) ? argv[argc - 1] : NULL);

  // open stream
  std::ifstream ifs;
  ifs.open(input_file, std::ios::in | std::ios::binary);
  if (ifs.fail() && NULL != input_file) {
    std::ostringstream error_message;
    error_message << "Cannot open file " << input_file;
    sptk::PrintErrorMessage("decimate", error_message);
    return 1;
  }
  std::istream& input_stream(ifs.fail() ? std::cin : ifs);

  std::vector<double> input_data(vector_length);

  // skip data
  for (int frame_index(0); frame_index < start_index; ++frame_index) {
    if (!sptk::ReadStream(false, 0, 0, vector_length, &input_data,
                          &input_stream)) {
      std::ostringstream error_message;
      error_message << "Start index exceeds data length";
      sptk::PrintErrorMessage("decimate", error_message);
      return 1;
    }
  }

  for (int frame_index(0);
       sptk::ReadStream(false, 0, 0, vector_length, &input_data, &input_stream);
       ++frame_index) {
    if (0 == frame_index % decimation_period) {
      if (!sptk::WriteStream(0, vector_length, input_data, &std::cout)) {
        std::ostringstream error_message;
        error_message << "Failed to write decimated data sequence";
        sptk::PrintErrorMessage("decimate", error_message);
        return 1;
      }
      frame_index = 0;
    }
  }

  return 0;
}