void
ExpressionFilter::Preflight( const SignalProperties& Input,
SignalProperties& Output ) const
{
// Test whether configuration can be loaded.
LCRandomGenerator rg;
Expr startRunExpression( rg, Parameter( "StartRunExpression" ) ),
stopRunExpression( rg, Parameter( "StopRunExpression" ) );
ExpressionMatrix expressions;
LoadExpressions( Parameter( "Expressions" ), expressions, rg );
VariableContainer variables;
// Request output signal properties:
Output = Input;
size_t numRows = expressions.size(),
numCols = numRows ? expressions[0].size() : 0;
if( numCols != 0 )
Output.SetChannels( numRows )
.SetElements( numCols )
.ElementUnit().SetGain( 1.0 ).SetOffset( 0.0 ).SetSymbol( "" );
// Try evaluating expressions.
startRunExpression.Compile( variables );
startRunExpression.Evaluate();
GenericSignal preflightInput( Input ), preflightOutput( Output );
CompileExpressions( expressions, variables );
EvaluateExpressions( expressions, &preflightInput, &preflightOutput );
stopRunExpression.Compile( variables );
stopRunExpression.Evaluate();
}
void
SpatialFilter::Preflight( const SignalProperties& Input,
SignalProperties& Output ) const
{
// Parameter/Input consistency.
if( Input.Channels() != Parameter( "SpatialFilter" )->NumColumns() )
bcierr << "The input signal's number of channels must match "
<< "the number of columns in the SpatialFilter parameter"
<< endl;
// Output signal description.
Output = Input;
Output.SetChannels( 0 ).SetChannels( Parameter( "SpatialFilter" )->NumRows() );
if( !Parameter( "SpatialFilter" )->RowLabels().IsTrivial() )
for( int i = 0; i < Parameter( "SpatialFilter" )->NumRows(); ++i )
Output.ChannelLabels()[ i ] = Parameter( "SpatialFilter" )->RowLabels()[ i ];
}
void
P3TemporalFilter::Preflight( const SignalProperties& Input,
SignalProperties& Output ) const
{
// Required states.
State( "Running" );
State( "StimulusCode" );
State( "StimulusType" );
OptionalState( "StimulusBegin" );
float outputSamples = MeasurementUnits::ReadAsTime( Parameter( "EpochLength" ) );
outputSamples *= Input.Elements();
outputSamples = ::ceil( outputSamples );
// Requested output signal properties.
Output = Input;
Output.SetChannels( Input.Channels() )
.SetElements( outputSamples )
.SetType( SignalType::float32 )
.ElementUnit().SetRawMin( 0 )
.SetRawMax( outputSamples - 1 );
}
void
P3TemporalFilter::Initialize( const SignalProperties& /*Input*/,
const SignalProperties& Output )
{
mEpochs.clear();
mEpochSums.clear();
mOutputProperties = Output;
mEpochsToAverage = Parameter( "EpochsToAverage" );
mVisualize = int( Parameter( "VisualizeP3TemporalFiltering" ) );
if( mVisualize )
{
mTargetERPChannel = Parameter( "TargetERPChannel" );
SignalProperties visProperties = Output;
visProperties.SetChannels( 12 );
mVisSignal = GenericSignal( visProperties );
mVis.Send( CfgID::WindowTitle, "ERP" )
.Send( mVisSignal.Properties() )
.Send( mVisSignal );
}
}
void
BufferedADC::Preflight( const SignalProperties&,
SignalProperties& Output ) const
{
if( Parameter( "SourceBufferSize" ).InSampleBlocks() < 2 )
bcierr << "The SourceBufferSize parameter must be greater or"
<< " equal 2 sample blocks."
<< endl;
State( "SourceTime" );
State( "Running" );
mAcquisitionProperties = Output;
this->OnPreflight( mAcquisitionProperties );
Output = mAcquisitionProperties;
int numStateChannels = 0;
for( int ch = 0; ch < Output.Channels(); ++ch )
{
bool isStateChannel = ( *Output.ChannelLabels()[ch].c_str() == StateMark );
if( numStateChannels && !isStateChannel )
bcierr_ << "State channels must be located at the end of the channel list";
else if( isStateChannel )
++numStateChannels;
}
Output.SetChannels( Output.Channels() - numStateChannels );
}
