view plugin/LADSPAPluginFactory.h @ 6:44bbf5793d84

* Rework handling of layer properties in file I/O -- we now get the individual
  layers to load and save them rather than doing it via generic property lists
  in the base class, so as to ensure we read and write meaningful values rather
  than generic int values requiring conversion.

/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */

/*
    A waveform viewer and audio annotation editor.
    Chris Cannam, Queen Mary University of London, 2005-2006
    
    This is experimental software.  Not for distribution.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2005 Chris Cannam and Richard Bown.
*/

#ifndef _LADSPA_PLUGIN_FACTORY_H_
#define _LADSPA_PLUGIN_FACTORY_H_

#include "RealTimePluginFactory.h"
#include "api/ladspa.h"

#include <vector>
#include <map>
#include <set>
#include <QString>

class LADSPAPluginInstance;

class LADSPAPluginFactory : public RealTimePluginFactory
{
public:
    virtual ~LADSPAPluginFactory();

    virtual void discoverPlugins();

    virtual const std::vector<QString> &getPluginIdentifiers() const;

    virtual void enumeratePlugins(std::vector<QString> &list);

    virtual RealTimePluginInstance *instantiatePlugin(QString identifier,
						      int clientId,
						      int position,
						      unsigned int sampleRate,
						      unsigned int blockSize,
						      unsigned int channels);

    float getPortMinimum(const LADSPA_Descriptor *, int port);
    float getPortMaximum(const LADSPA_Descriptor *, int port);
    float getPortDefault(const LADSPA_Descriptor *, int port);
    int getPortDisplayHint(const LADSPA_Descriptor *, int port);

protected:
    LADSPAPluginFactory();
    friend class RealTimePluginFactory;

    virtual std::vector<QString> getPluginPath();

#ifdef HAVE_LIBLRDF
    virtual std::vector<QString> getLRDFPath(QString &baseUri);
#endif

    virtual void discoverPlugins(QString soName);
    virtual void generateTaxonomy(QString uri, QString base);
    virtual void generateFallbackCategories();

    virtual void releasePlugin(RealTimePluginInstance *, QString);

    virtual const LADSPA_Descriptor *getLADSPADescriptor(QString identifier);

    void loadLibrary(QString soName);
    void unloadLibrary(QString soName);
    void unloadUnusedLibraries();

    std::vector<QString> m_identifiers;

    std::map<unsigned long, QString> m_taxonomy;
    std::map<QString, QString> m_fallbackCategories;
    std::map<unsigned long, std::map<int, float> > m_portDefaults;

    std::set<RealTimePluginInstance *> m_instances;

    typedef std::map<QString, void *> LibraryHandleMap;
    LibraryHandleMap m_libraryHandles;
};

#endif