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//
// This file is part of libGDF.
//
// libGDF is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// libGDF is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with libGDF. If not, see <http://www.gnu.org/licenses/>.
//
// Copyright 2010 Martin Billinger
#include "gdfmerger.h"
#include <exception>
#include <boost/filesystem.hpp>
using std::vector;
using std::string;
using std::cerr;
using std::cout;
using std::endl;
namespace fs = boost::filesystem;
//---------------------------------------------------------------------------------------
gdfMerger::gdfMerger(const vector<string>& inputs, const string& output)
: input_files_(inputs), output_file_(output), event_offset_(0)
{
for(unsigned int n = 0; n < inputs.size(); n++)
if(!fs::exists(inputs[n]) )
throw(std::invalid_argument("Error - file not found: " + inputs[n]));
}
//---------------------------------------------------------------------------------------
gdfMerger::~gdfMerger()
{
}
//---------------------------------------------------------------------------------------
void gdfMerger::merge()
{
reader_.open(input_files_[0]);
writer_.getMainHeader( ).copyFrom( reader_.getMainHeader_readonly() );
writer_.getHeaderAccess().setRecordDuration( reader_.getMainHeader_readonly().get_datarecord_duration( 0 ), reader_.getMainHeader_readonly().get_datarecord_duration( 1 ) );
for( size_t m = 0; m < writer_.getMainHeader_readonly().get_num_signals(); m++ )
{
writer_.createSignal( m, true );
writer_.getSignalHeader( m ).copyFrom( reader_.getSignalHeader_readonly( m ) );
//writer_.getSignalHeader( m ).set_samplerate( reader_.getSignalHeader_readonly( m ).get_samplerate() );
}
gdf::EventHeader* ev_header = reader_.getEventHeader();
gdf::float32 fs_events = ev_header->getSamplingRate();
writer_.setEventMode( ev_header->getMode() );
writer_.setEventSamplingRate(fs_events);
reader_.close( );
writer_.setMaxFullRecords( 0 );
writer_.open( output_file_, gdf::writer_ev_memory | gdf::writer_overwrite );
std::cout << "Record Duration : " << writer_.getMainHeader_readonly( ).get_datarecord_duration(0) << " : " << writer_.getMainHeader_readonly( ).get_datarecord_duration(1) << std::endl;
std::cout << "Sampling Rate : " << writer_.getSignalHeader_readonly( 1 ).get_samplerate() << std::endl;
std::cout << "Samples per Record: " << writer_.getSignalHeader_readonly( 1 ).get_samples_per_record() << std::endl;
for(unsigned int n = 0; n < input_files_.size(); n++)
{
reader_.enableCache( false );
reader_.open(input_files_[n]);
cout << " -- merging: " << input_files_[n];
cout << " Warning: No header checks performed yet!" << endl;
size_t num_recs = boost::numeric_cast<size_t>( reader_.getMainHeader_readonly( ).get_num_datarecords( ) );
std::cout << " Number of records: " << num_recs << std::endl;
for( size_t r = 0; r< num_recs; r++ )
//for( size_t r = 0; r< 1; r++ )
{
//std::cout << r << std::endl;
//gdf::Record *rec = reader_.getRecordPtr( r );
//writer_.writeRecordDirect( rec );
gdf::Record *rec = writer_.acquireRecord( );
reader_.readRecord( r, rec );
writer_.addRecord( rec );
/*for( size_t i=0; i< rec->getNumChannels( ); i++ )
{
gdf::Channel *ch = rec->getChannel( i );
std::cout << ch->getSize( ) << " ";
}
std::cout << std::endl;*/
/*for( size_t c = 0; c < reader_.getMainHeader_readonly().get_num_signals(); c++ )
{
for( size_t n = 0; n < reader_.getSignalHeader_readonly(c).get_samples_per_record(); n++ )
{
double v = rec->getChannel(c)->getSamplePhys(n);
writer_.addSamplePhys( c, v );
}
}*/
}
ev_header = reader_.getEventHeader();
unsigned int num_events = ev_header->getNumEvents();
if(ev_header->getSamplingRate() != fs_events)
throw(std::runtime_error("ERROR -- Event sampling rates differ!"));
switch( ev_header->getMode() )
{
default: throw(std::runtime_error("ERROR -- Invalid event mode!"));
case 1: {
gdf::Mode1Event ev;
for(unsigned int m = 0; m < num_events; m++)
{
ev_header->getEvent(m, ev);
ev.position += event_offset_;
writer_.addEvent(ev);
}
} break;
case 3: {
gdf::Mode3Event ev;
for(unsigned int m = 0; m < num_events; m++)
{
ev_header->getEvent(m, ev);
ev.position += event_offset_;
writer_.addEvent(ev);
}
} break;
}
double recdur_num = boost::numeric_cast<double>( reader_.getMainHeader_readonly().get_datarecord_duration( 0 ) );
double recdur_den = boost::numeric_cast<double>( reader_.getMainHeader_readonly().get_datarecord_duration( 1 ) );
double numrec = boost::numeric_cast<double>( reader_.getMainHeader_readonly().get_num_datarecords( ) );
event_offset_ += boost::numeric_cast<gdf::uint32>( numrec * recdur_num * (fs_events / recdur_den) );
reader_.close();
}
writer_.close();
}
//---------------------------------------------------------------------------------------
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