LadspaWrapper.cxx

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#ifdef USE_LADSPA

#include "LadspaWrapper.hxx"
#include "OSDefines.hxx"
#include "CLAM_Math.hxx"
#include "Factory.hxx"
#include "AudioInPort.hxx"
#include "AudioOutPort.hxx"
#include "InControl.hxx"
#include "OutControl.hxx"
#include <ctime>
#include <cstdlib>

namespace CLAM
{


LadspaWrapper::LadspaWrapper( const Config & cfg)
        : _instance(0)
        , _descriptor(0)
        , _sharedObject(0)
        , _libraryFileName("")
        , _bufferSize(0)
{
        Configure(cfg);
}

LadspaWrapper::LadspaWrapper( const std::string& libraryFileName, unsigned index, const std::string& key )
        : _instance(0)
        , _descriptor(0)
        , _sharedObject(0)
        , _libraryFileName("")
        , _bufferSize(0)
{
        //std::cout<<"LadspaWrapper()"<<std::endl;
        Config cfg;
        LoadLibraryFunction( libraryFileName, index, key);
        Configure(cfg);
}

LadspaWrapper::~LadspaWrapper()
{
        //std::cout<<"~LadspaWrapper()"<<std::endl;
        if (_instance)
        {
                if (_descriptor->cleanup) _descriptor->cleanup(_instance);
                //std::cout<<"_descriptor->cleanup called"<<std::endl;
        }
        RemovePortsAndControls();
        // if a library function was used, a handle is opened: close it
        if (_sharedObject && (_libraryFileName!=""))
        {
                if (RunTimeLibraryLoader::ReleaseLibraryHandler(_sharedObject,_libraryFileName))
                {
                                std::cout<<"[LADSPA] error unloading library handle of: "<<_libraryFileName<<std::endl;
                                std::cout<<RunTimeLibraryLoader::LibraryLoadError()<<std::endl;
                }
        }
}

bool LadspaWrapper::ConcreteStart()
{
        if (_descriptor->activate)
                _descriptor->activate(_instance);
        return true;
}
bool LadspaWrapper::ConcreteStop()
{
        if (_descriptor->deactivate)
                _descriptor->deactivate(_instance);
        return true;
}

bool LadspaWrapper::Do()
{
        DoUpdatePortsPointers();

        _descriptor->run(_instance, _bufferSize );

        for(unsigned int i=0;i<_outputControlValues.size();i++)
                SendFloatToOutControl(*this, i, _outputControlValues[i]);

        for(unsigned int i=0;i<_inputPorts.size();i++)
                 _inputPorts[i]->Consume();
        for(unsigned int i=0;i<_outputPorts.size();i++)
                _outputPorts[i]->Produce();
        return true;
}
bool LadspaWrapper::LoadLibraryFunction(const std::string& libraryFileName, unsigned index, const std::string& factoryKey)
{
        //std::cout<<"LadspaWrapper::LoadLibraryFunction("<<libraryFileName<<")"<<std::endl;
        _sharedObject = RunTimeLibraryLoader::LazyLoadLibrary(libraryFileName);
        LADSPA_Descriptor_Function function = (LADSPA_Descriptor_Function)RunTimeLibraryLoader::GetSymbol(_sharedObject, "ladspa_descriptor");
        if(!function)
        {
                std::string error = "[LADSPA] can't open library: " + libraryFileName;
                throw ErrFactory(error.c_str());
        }
        _descriptor = function(index);
        _instance = _descriptor->instantiate(_descriptor, 44100);
        _factoryKey = factoryKey;
        _libraryFileName=libraryFileName;
        return true;
}
bool LadspaWrapper::ConcreteConfigure(const ProcessingConfig&)
{
        _bufferSize = BackendBufferSize();
        ConfigurePortsAndControls();
        ConfigureControlsPointers();
        return true;
}
void LadspaWrapper::RemovePortsAndControls()
{
        std::vector< AudioInPort* >::iterator itInPort;
        for(itInPort=_inputPorts.begin(); itInPort!=_inputPorts.end(); itInPort++)
                delete *itInPort;
        _inputPorts.clear();

        std::vector< AudioOutPort* >::iterator itOutPort;
        for(itOutPort=_outputPorts.begin(); itOutPort!=_outputPorts.end(); itOutPort++)
                delete *itOutPort;
        _outputPorts.clear();

        std::vector< FloatInControl* >::iterator itInControl;
        for(itInControl=_inputControls.begin(); itInControl!=_inputControls.end(); itInControl++)
                delete *itInControl;
        _inputControls.clear();

        std::vector< FloatOutControl* >::iterator itOutControl;
        for(itOutControl=_outputControls.begin(); itOutControl!=_outputControls.end(); itOutControl++)
                delete *itOutControl;
        _outputControls.clear();

        _outputControlValues.clear();

        GetInPorts().Clear();
        GetOutPorts().Clear();
        GetInControls().Clear();
        GetOutControls().Clear();
}

void LadspaWrapper::ConfigurePortsAndControls()
{
        RemovePortsAndControls();
        for(unsigned int i=0;i<_descriptor->PortCount;i++)
        {
                const LADSPA_PortDescriptor portDescriptor = _descriptor->PortDescriptors[i];
                // in port
                if(LADSPA_IS_PORT_INPUT(portDescriptor) && LADSPA_IS_PORT_AUDIO(portDescriptor))
                {
                        AudioInPort * port = new AudioInPort(_descriptor->PortNames[i],this );
                        port->SetSize( _bufferSize );
                        _inputPorts.push_back(port);
                }
                // out port
                if(LADSPA_IS_PORT_OUTPUT(portDescriptor) && LADSPA_IS_PORT_AUDIO(portDescriptor))
                {
                        AudioOutPort * port = new AudioOutPort(_descriptor->PortNames[i],this );
                        port->SetSize( _bufferSize );
                        _outputPorts.push_back(port);
                }

                // in control
                if(LADSPA_IS_PORT_INPUT(portDescriptor) && LADSPA_IS_PORT_CONTROL(portDescriptor))
                {
                        FloatInControl * control = new FloatInControl(_descriptor->PortNames[i], this);

                        const LADSPA_PortRangeHint & hint = _descriptor->PortRangeHints[i];
                        bool isBounded = (
                                LADSPA_IS_HINT_BOUNDED_ABOVE(hint.HintDescriptor) &&
                                LADSPA_IS_HINT_BOUNDED_BELOW(hint.HintDescriptor)
                                );
                        if (isBounded)
                        {
                                control->SetBounds( hint.LowerBound, hint.UpperBound );
                                control->DoControl( control->DefaultValue() );
                        }
                        _inputControls.push_back(control);
                }
                // out control
                if (LADSPA_IS_PORT_OUTPUT(portDescriptor) && LADSPA_IS_PORT_CONTROL(portDescriptor))
                {
                        FloatOutControl * control = new FloatOutControl(_descriptor->PortNames[i], this);
                        _outputControlValues.push_back(LADSPA_Data());
                        _outputControls.push_back(control);
                }
        }
}

void LadspaWrapper::ConfigureControlsPointers()
{
        int inControlIndex = 0;
        int outControlIndex = 0;
        for(unsigned int i=0;i<_descriptor->PortCount;i++)
        {
                const LADSPA_PortDescriptor portDescriptor = _descriptor->PortDescriptors[i];
                if (LADSPA_IS_PORT_CONTROL(portDescriptor))
                {
                        if (LADSPA_IS_PORT_INPUT(portDescriptor))
                        {
                                LADSPA_Data* inControlValue = const_cast<LADSPA_Data*>( &(_inputControls[inControlIndex]->GetLastValue()) );
                                _descriptor->connect_port(_instance, i, inControlValue);
                                inControlIndex++;
                        }
                        else
                                _descriptor->connect_port(_instance, i, & _outputControlValues[outControlIndex++]);
                }
        }
}

void LadspaWrapper::DoUpdatePortsPointers()
{
        int inPortIndex = 0;
        int outPortIndex = 0;
        for(unsigned int i=0;i<_descriptor->PortCount;i++)
        {
                const LADSPA_PortDescriptor portDescriptor = _descriptor->PortDescriptors[i];
                if (!LADSPA_IS_PORT_CONTROL(portDescriptor)) // is audio port
                {
                        if (LADSPA_IS_PORT_INPUT(portDescriptor))
                                _descriptor->connect_port(_instance, i, _inputPorts[inPortIndex++]->GetAudio().GetBuffer().GetPtr());
                        else
                                _descriptor->connect_port(_instance, i, _outputPorts[outPortIndex++]->GetAudio().GetBuffer().GetPtr());
                }
        }

}

const char * LadspaWrapper::GetClassName() const
{
        return _factoryKey.c_str();
}

} // namespace CLAM

#endif // USE_LADSPA