view trunk/src/Modules/Output/FileOutputAIMC.cc @ 706:f8e90b5d85fd tip

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// 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 "Modules/Output/FileOutputAIMC.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 {
FileOutputAIMC::FileOutputAIMC(Parameters *params) : Module(params) {
  module_description_ = "File output in AIMC format";
  module_identifier_ = "aimc_out";
  module_type_ = "output";
  module_version_ = "$Id: FileOutputAIMC.cc 51 2010-03-30 22:06:24Z tomwalters $";
  file_suffix_ = parameters_->DefaultString("file_suffix", ".aimc");
  dump_strobes_ = parameters_->DefaultBool("dump_strobes", false);
  strobes_file_suffix_ = parameters_->DefaultString("strobes_file_suffix", ".strobes");

  file_handle_ = NULL;
  strobes_file_handle_ = NULL;
  header_written_ = false;
  frame_period_ms_ = 0.0f;
}

FileOutputAIMC::~FileOutputAIMC() {
  if (file_handle_ != NULL)
    CloseFile();
  if (strobes_file_handle_ != NULL)
      CloseStrobesFile();
}

bool FileOutputAIMC::OpenStrobesFile(string &filename) {
  if (strobes_file_handle_ != NULL) {
    LOG_ERROR(_T("Couldn't open strobes output file. A file is already open."));
    return false;
  }
  // Check that the output file exists and is writeable
  if ((strobes_file_handle_ = fopen(filename.c_str(), "wb")) == NULL) {
    LOG_ERROR(_T("Couldn't open output file '%s' for writing."), filename.c_str());
    return false;
  }
  return true;
}

bool FileOutputAIMC::OpenFile(string &filename) {
  if (file_handle_ != NULL) {
    LOG_ERROR(_T("Couldn't open output file. A file is already open."));
    return false;
  }

  // Check that the output file exists and is writeable
  if ((file_handle_ = fopen(filename.c_str(), "wb")) == NULL) {
    LOG_ERROR(_T("Couldn't open output file '%s' for writing."), filename.c_str());
    return false;
  }
  // Write temporary values for the frame count and frame period.
  frame_count_ = 0;
  frame_period_ms_ = 0.0;
  header_written_ = false;
  if (initialized_) {
    WriteHeader();
  }
  
  return true;
}

bool FileOutputAIMC::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 FileOutputAIMC::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);
  if (dump_strobes_) {
    if (strobes_file_handle_ != NULL) {
      CloseStrobesFile();
    }
    string strobes_filename =
      global_parameters_->GetString("output_filename_base")
        + strobes_file_suffix_;
    OpenStrobesFile(strobes_filename);
  }
}

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

  /* File format:
   * Header: Number of frames (uint32),
   *         Frame period in milliseconds (float32),
   *         Number of channels per frame (uint32),
   *         Number of samples per channel of each frame (uint32)
   *         Sample rate (float32)
   *
   * Data: Series of floats, by time, then channel, then frame
   * f1c1t1,f1c1t2,f1c1t3...
   */

  uint32_t frame_count_out = frame_count_;
  float sample_period_out = frame_period_ms_;
  uint32_t channels_out = channel_count_;
  uint32_t samples_out = buffer_length_;
  float sample_rate = sample_rate_;

  fwrite(&frame_count_out, sizeof(frame_count_out), 1, file_handle_);
  fwrite(&sample_period_out, sizeof(sample_period_out), 1, file_handle_);
  fwrite(&channels_out, sizeof(channels_out), 1, file_handle_);
  fwrite(&samples_out, sizeof(samples_out), 1, file_handle_);
  fwrite(&sample_rate, sizeof(sample_rate), 1, file_handle_);
  fflush(file_handle_);

  header_written_ = true;
}

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

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

  for (int ch = 0; ch < input.channel_count(); ch++) {
    for (int i = 0; i < input.buffer_length(); i++) {
      s = input.sample(ch, i);
      fwrite(&s, sizeof(s), 1, file_handle_);
    }
  }
  frame_count_++;
  
  if (dump_strobes_) {
    if (strobes_file_handle_ == NULL) {
      LOG_ERROR(_T("Couldn't process file output for strobes. No srobes file is open."
                   "Please call FileOutputAIMC::OpenStrobesFile first"));
      return;
    }
    int strobe;
    for (int ch = 0; ch < input.channel_count(); ch++) {
      const int kStartOfStrobeRow = -65535;
      strobe = kStartOfStrobeRow;
      fwrite(&strobe, sizeof(strobe), 1, strobes_file_handle_);
      for (int i = 0; i < static_cast<int>(input.get_strobes(ch).size());
           i++) {
        strobe = input.get_strobes(ch)[i];
        fwrite(&strobe, sizeof(strobe), 1, strobes_file_handle_);
      }
    } 
  }
  
}

bool FileOutputAIMC::CloseStrobesFile() {
  if (strobes_file_handle_ == NULL)
    return false;

  // And close the file
  fclose(strobes_file_handle_);
  strobes_file_handle_ = NULL;
  return true;
}

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

  // Write the first 4 bytes of the file
  // with how many samples there are in the file
  fflush(file_handle_);
  rewind(file_handle_);
  fflush(file_handle_);
  uint32_t frame_count = frame_count_;
  float sample_period_out = frame_period_ms_;
  fwrite(&frame_count, sizeof(frame_count), 1, file_handle_);
  fwrite(&sample_period_out, sizeof(sample_period_out), 1, file_handle_);

  // And close the file
  fclose(file_handle_);
  file_handle_ = NULL;
  header_written_ = false;
  return true;
}
}  // namespace aimc