void ReadDirectory::execute(DataProvider& provider)
{
if (m_files.size() == 0)
throw OperatorError(*this, "Directory is empty.");
Data* data = 0;
std::size_t index = m_currentIndex;
do
{
boost::filesystem::path file(m_files[index]);
index = (index + 1) % m_files.size();
std::string ext = file.extension().string();
std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
if (ext == ".png" || ext == ".jpg" || ext == ".jpeg")
{
data = new cvsupport::Image(file.string());
}
}
while (data == 0 && index != m_currentIndex);
m_currentIndex = index;
if (data == 0)
throw OperatorError(*this, "Found no usable file in selected directory.");
DataContainer container(data);
Id2DataPair outputDataMapper(OUTPUT, container);
provider.sendOutputData(outputDataMapper);
}
void ConstData::execute(DataProvider& provider)
{
if (! valuePtr())
throw InternalError("Value has not been set");
DataContainer data;
if (m_allocateData)
{
data = DataContainer(valuePtr()->clone());
}
else
{
Data* dataPtr = 0;
if (m_recycleAccess.empty())
{
// if this is the first time the operator executes the value must
// be cloned
dataPtr = valuePtr()->clone();
}
else
{
// otherwise the value in the recycler can be reused
dataPtr = m_recycleAccess.get();
}
if (dataPtr != valuePtr())
{
// if the value was changed by the user since the last execution
// update it
delete dataPtr;
dataPtr = valuePtr()->clone();
}
// send and remember for the next execution
data = DataContainer(dataPtr);
m_recycleAccess.add(data);
}
Id2DataPair outputDataMapper(OUTPUT, data);
provider.sendOutputData( outputDataMapper);
}
void Flicker::execute(DataProvider& provider)
{
Id2DataPair inputDataMapper(INPUT);
provider.receiveInputData(inputDataMapper);
DataContainer container = inputDataMapper.data();
WriteAccess access(container);
runtime::Image& image = access.get<runtime::Image>();
switch(image.depth())
{
case 1:
applyFlicker<uint8_t>(m_amount, image);
break;
case 2:
applyFlicker<uint16_t>(m_amount, image);
break;
default:
throw WrongInputType(INPUT, *this);
}
Id2DataPair outputDataMapper(OUTPUT, container);
provider.sendOutputData( outputDataMapper);
}
