annotate src/Modules/Output/FileOutputJSON.cc @ 611:0fbaf443ec82

Carfac C++ revision 3, indluding more style improvements. The output structs are now classes again, and have separate storage methods for each output structure along with flags in the Run and RunSegment methods to allow for only storing NAPs if desired.

// Copyright 2006-2010, Thomas Walters
//
// AIM-C: A C++ implementation of the Auditory Image Model
// http://www.acousticscale.org/AIMC
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/*!
 * \file
 * \brief File output in the HTK format.
 *
 * \author Tom Walters <[e-mail]>
 * \author Willem van Engen <[e-mail]>
 * \date created 2007/01/26
 * \version \$Id: $
 */


#include <iostream>
#include <fstream>
#include <iomanip>

#include "Modules/Output/FileOutputJSON.h"

#ifdef _WINDOWS
#  include <direct.h>  // for _mkdir & _rmdir
#else
#  include <sys/types.h>
#  include <dirent.h>  // for opendir & friends
#endif

#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <cmath>
#include <string>

namespace aimc {
FileOutputJSON::FileOutputJSON(Parameters *params) : Module(params) {
  module_description_ = "File output in JSON format";
  module_identifier_ = "json_out";
  module_type_ = "output";
  module_version_ = "$Id: FileOutputJSON.cc 51 2010-03-30 22:06:24Z tomwalters $";
  file_suffix_ = parameters_->DefaultString("file_suffix", ".json");

  header_written_ = false;
  frame_period_ms_ = 0.0f;
}

FileOutputJSON::~FileOutputJSON() {
  if (file_handle_)
    CloseFile();
}

bool FileOutputJSON::OpenFile(string &filename) {
  file_handle_.open(filename.c_str());
  
  frame_count_ = 0;
  frame_period_ms_ = 0.0;
  header_written_ = false;

  if (initialized_) {
    WriteHeader();
  }
  
  return true;
}

bool FileOutputJSON::InitializeInternal(const SignalBank &input) {
  channel_count_ = input.channel_count();
  buffer_length_ = input.buffer_length();  
  sample_rate_ = input.sample_rate();
  ResetInternal();
  if (file_handle_ == NULL) {
    LOG_ERROR(_T("Couldn't initialize file output."));
    return false;
  }
  return true;
}

void FileOutputJSON::ResetInternal() {
  if (file_handle_ != NULL && !header_written_) {
    WriteHeader();
  }
  if (file_handle_ != NULL)
    CloseFile();
    
  string out_filename;
  out_filename = global_parameters_->GetString("output_filename_base") + file_suffix_;
  OpenFile(out_filename);
}

void FileOutputJSON::WriteHeader() {
  if (header_written_)
    return;

  uint32_t channels_out = channel_count_;
  uint32_t samples_out = buffer_length_;
  float sample_rate = sample_rate_;

  file_handle_ << std::setprecision(3);
  file_handle_ << "{" << std::endl;
  file_handle_ << "\"channels\" : " << channels_out << "," << std::endl;
  file_handle_ << "\"samples\" : " << sizeof(samples_out) << "," << std::endl;
  file_handle_ << "\"sample_rate\" : " << sizeof(sample_rate) << "," << std::endl;

  header_written_ = true;
}

void FileOutputJSON::Process(const SignalBank &input) {
  if (file_handle_ == NULL) {
    LOG_ERROR(_T("Couldn't process file output. No file is open."
                 "Please call FileOutputJSON::OpenFile first"));
    return;
  }

  if (!header_written_) {
    LOG_ERROR(_T("No header has been written on the output file yet. Please "
                 "call FileOutputJSON::Initialize() before calling "
                 "FileOutputJSON::Process()"));
    return;
  }
  float s;

  for (int ch = 0; ch < input.channel_count(); ch++) {
    file_handle_ << "\"channel\" : [";
    for (int i = 0; i < input.buffer_length(); i++) {
      s = input.sample(ch, i);
      file_handle_ << s;
      if (i < input.buffer_length() - 1) {
        file_handle_ << ",";
      }
    }
    file_handle_ << "]" << std::endl;
    if (ch < input.channel_count() - 1) {
      file_handle_ << ",";
    }
  }

  frame_count_++;

}

bool FileOutputJSON::CloseFile() {
  if (file_handle_ == NULL)
    return false;

  uint32_t frame_count = frame_count_;
  float sample_period_out = frame_period_ms_;

  file_handle_ << "\"frame_count\" : " << sizeof(frame_count) << std::endl;
  file_handle_ << "\"samples\" : " << sizeof(sample_period_out) << std::endl;
  file_handle_ << "}" << std::endl;


  file_handle_.close();
  header_written_ = false;
  return true;
}
}  // namespace aimc