tomwalters@46: // Copyright 2006-2010, Thomas Walters
tomwalters@46: //
tomwalters@46: // AIM-C: A C++ implementation of the Auditory Image Model
tomwalters@46: // http://www.acousticscale.org/AIMC
tomwalters@46: //
tomwalters@46: // Licensed under the Apache License, Version 2.0 (the "License");
tomwalters@46: // you may not use this file except in compliance with the License.
tomwalters@46: // You may obtain a copy of the License at
tomwalters@46: //
tomwalters@46: //     http://www.apache.org/licenses/LICENSE-2.0
tomwalters@46: //
tomwalters@46: // Unless required by applicable law or agreed to in writing, software
tomwalters@46: // distributed under the License is distributed on an "AS IS" BASIS,
tomwalters@46: // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tomwalters@46: // See the License for the specific language governing permissions and
tomwalters@46: // limitations under the License.
tomwalters@46: 
tomwalters@46: /*!
tomwalters@46:  * \file
tomwalters@46:  * \brief File output in the HTK format.
tomwalters@46:  *
tomwalters@46:  * \author Tom Walters <tom@acousticscale.org>
tomwalters@46:  * \author Willem van Engen <cnbh@willem.engen.nl>
tomwalters@46:  * \date created 2007/01/26
tomwalters@46:  * \version \$Id: $
tomwalters@46:  */
tomwalters@46: 
tomwalters@46: #ifdef _WINDOWS
tomwalters@46: #  include <direct.h>  // for _mkdir & _rmdir
tomwalters@46: #else
tomwalters@46: #  include <sys/types.h>
tomwalters@46: #  include <dirent.h>  // for opendir & friends
tomwalters@46: #endif
tomwalters@46: 
tomwalters@46: #include <stdint.h>
tomwalters@46: #include <stdio.h>
tomwalters@46: #include <string.h>
tomwalters@46: #include <cmath>
tomwalters@46: 
tomwalters@46: #include "Modules/Output/FileOutputAIMC.h"
tomwalters@46: 
tomwalters@46: namespace aimc {
tomwalters@46: FileOutputAIMC::FileOutputAIMC(Parameters *params) : Module(params) {
tomwalters@46:   module_description_ = "File output in AIMC format";
tomwalters@46:   module_identifier_ = "htk_out";
tomwalters@46:   module_type_ = "output";
tomwalters@46:   module_version_ = "$Id: FileOutputAIMC.cc 51 2010-03-30 22:06:24Z tomwalters $";
tomwalters@46: 
tomwalters@46:   file_handle_ = NULL;
tomwalters@46:   header_written_ = false;
tomwalters@46:   frame_period_ms_ = 0.0f;
tomwalters@46: }
tomwalters@46: 
tomwalters@46: FileOutputAIMC::~FileOutputAIMC() {
tomwalters@46:   if (file_handle_ != NULL)
tomwalters@46:     CloseFile();
tomwalters@46: }
tomwalters@46: 
tomwalters@46: bool FileOutputAIMC::OpenFile(const char* filename, float frame_period_ms) {
tomwalters@46:   if (file_handle_ != NULL) {
tomwalters@46:     LOG_ERROR(_T("Couldn't open output file. A file is already open."));
tomwalters@46:     return false;
tomwalters@46:   }
tomwalters@46: 
tomwalters@46:   // Check that the output file exists and is writeable
tomwalters@46:   if ((file_handle_ = fopen(filename, "wb")) == NULL) {
tomwalters@46:     LOG_ERROR(_T("Couldn't open output file '%s' for writing."), filename);
tomwalters@46:     return false;
tomwalters@46:   }
tomwalters@46:   sample_count_ = 0;
tomwalters@46:   frame_period_ms_ = frame_period_ms;
tomwalters@46:   header_written_ = false;
tomwalters@46:   if (initialized_) {
tomwalters@46:     WriteHeader();
tomwalters@46:   }
tomwalters@46:   return true;
tomwalters@46: }
tomwalters@46: 
tomwalters@46: bool FileOutputAIMC::InitializeInternal(const SignalBank &input) {
tomwalters@46:   if (file_handle_ == NULL) {
tomwalters@46:     LOG_ERROR(_T("Couldn't initialize file output. "
tomwalters@46:                  "Please call FileOutputAIMC::OpenFile first"));
tomwalters@46:     return false;
tomwalters@46:   }
tomwalters@46:   if (header_written_) {
tomwalters@46:     LOG_ERROR(_T("A header has already been written on the output file. "
tomwalters@46:                  "Please call FileOutputAIMC::CloseFile to close that file, "
tomwalters@46:                  "and FileOutputAIMC::OpenFile to open an new one before "
tomwalters@46:                  "calling FileOutputAIMC::Initialize again."));
tomwalters@46:     return false;
tomwalters@46:   }
tomwalters@46:   channel_count_ = input.channel_count();
tomwalters@46:   buffer_length_ = input.buffer_length();	
tomwalters@46:   sample_rate_ = input.sample_rate();	
tomwalters@46:   WriteHeader();
tomwalters@46:   return true;
tomwalters@46: }
tomwalters@46: 
tomwalters@46: void FileOutputAIMC::ResetInternal() {
tomwalters@46:   if (file_handle_ != NULL && !header_written_) {
tomwalters@46:     WriteHeader();
tomwalters@46:   }
tomwalters@46:   if (file_handle_ != NULL)
tomwalters@46:     CloseFile();
tomwalters@46: }
tomwalters@46: 
tomwalters@46: void FileOutputAIMC::WriteHeader() {
tomwalters@46:   if (header_written_)
tomwalters@46:     return;
tomwalters@46: 
tomwalters@46:   /* File format:
tomwalters@46:    * Header: Number of frames (uint32),
tomwalters@46:    *         Frame period in milliseconds (float32),
tomwalters@46:    *         Number of channels per frame (uint32),
tomwalters@46:    *         Number of samples per channel of each frame (uint32)
tomwalters@46:    *         Sample rate (float32)
tomwalters@46:    *
tomwalters@46:    * Data: Series of floats, by time, then channel, then frame
tomwalters@46:    * f1c1t1,f1c1t2,f1c1t3...
tomwalters@46:    */
tomwalters@46: 
tomwalters@46:   uint32_t sample_count_out = sample_count_;
tomwalters@46:   float sample_period_out = frame_period_ms_;
tomwalters@46:   uint32_t channels_out = channel_count_;
tomwalters@46:   uint32_t samples_out = buffer_length_;
tomwalters@46:   float sample_rate = sample_rate_;
tomwalters@46: 
tomwalters@46:   fwrite(&sample_count_out, sizeof(sample_count_out), 1, file_handle_);
tomwalters@46:   fwrite(&sample_period_out, sizeof(sample_period_out), 1, file_handle_);
tomwalters@46:   fwrite(&channels_out, sizeof(channels_out), 1, file_handle_);
tomwalters@46:   fwrite(&samples_out, sizeof(samples_out), 1, file_handle_);
tomwalters@46:   fwrite(&sample_rate, sizeof(sample_rate), 1, file_handle_);
tomwalters@46:   fflush(file_handle_);
tomwalters@46: 
tomwalters@46:   header_written_ = true;
tomwalters@46: }
tomwalters@46: 
tomwalters@46: void FileOutputAIMC::Process(const SignalBank &input) {
tomwalters@46:   if (file_handle_ == NULL) {
tomwalters@46:     LOG_ERROR(_T("Couldn't process file output. No file is open."
tomwalters@46:                  "Please call FileOutputAIMC::OpenFile first"));
tomwalters@46:     return;
tomwalters@46:   }
tomwalters@46: 
tomwalters@46:   if (!header_written_) {
tomwalters@46:     LOG_ERROR(_T("No header has been written on the output file yet. Please "
tomwalters@46:                  "call FileOutputAIMC::Initialize() before calling "
tomwalters@46:                  "FileOutputAIMC::Process()"));
tomwalters@46:     return;
tomwalters@46:   }
tomwalters@46:   float s;
tomwalters@46: 
tomwalters@46:   for (int ch = 0; ch < input.channel_count(); ch++) {
tomwalters@46:     for (int i = 0; i < input.buffer_length(); i++) {
tomwalters@46:       s = input.sample(ch, i);
tomwalters@46:       fwrite(&s, sizeof(s), 1, file_handle_);
tomwalters@46:     }
tomwalters@46:   }
tomwalters@46:   sample_count_++;
tomwalters@46: }
tomwalters@46: 
tomwalters@46: bool FileOutputAIMC::CloseFile() {
tomwalters@46:   if (file_handle_ == NULL)
tomwalters@46:     return false;
tomwalters@46: 
tomwalters@46:   // Write the first 4 bytes of the file
tomwalters@46:   // with how many samples there are in the file
tomwalters@46:   fflush(file_handle_);
tomwalters@46:   rewind(file_handle_);
tomwalters@46:   fflush(file_handle_);
tomwalters@46:   uint32_t samples = sample_count_;
tomwalters@46:   fwrite(&samples, sizeof(samples), 1, file_handle_);
tomwalters@46: 
tomwalters@46:   // And close the file
tomwalters@46:   fclose(file_handle_);
tomwalters@46:   file_handle_ = NULL;
tomwalters@46:   header_written_ = false;
tomwalters@46:   return true;
tomwalters@46: }
tomwalters@46: }  // namespace aimc
tomwalters@46: