view plugin/LADSPAPluginInstance.h @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2006 Chris Cannam and Richard Bown.
*/

#ifndef _LADSPAPLUGININSTANCE_H_
#define _LADSPAPLUGININSTANCE_H_

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

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

// LADSPA plugin instance.  LADSPA is a variable block size API, but
// for one reason and another it's more convenient to use a fixed
// block size in this wrapper.
//
class LADSPAPluginInstance : public RealTimePluginInstance
{
public:
    virtual ~LADSPAPluginInstance();

    virtual bool isOK() const { return m_instanceHandles.size() != 0; }

    int getClientId() const { return m_client; }
    virtual QString getPluginIdentifier() const { return m_identifier; }
    int getPosition() const { return m_position; }

    virtual std::string getIdentifier() const;
    virtual std::string getName() const;
    virtual std::string getDescription() const;
    virtual std::string getMaker() const;
    virtual int getPluginVersion() const;
    virtual std::string getCopyright() const;

    virtual void run(const Vamp::RealTime &rt, size_t count = 0);

    virtual unsigned int getParameterCount() const;
    virtual void setParameterValue(unsigned int parameter, float value);
    virtual float getParameterValue(unsigned int parameter) const;
    virtual float getParameterDefault(unsigned int parameter) const;
    virtual int getParameterDisplayHint(unsigned int parameter) const;
    
    virtual ParameterList getParameterDescriptors() const;
    virtual float getParameter(std::string) const;
    virtual void setParameter(std::string, float);

    virtual size_t getBufferSize() const { return m_blockSize; }
    virtual size_t getAudioInputCount() const { return m_instanceCount * m_audioPortsIn.size(); }
    virtual size_t getAudioOutputCount() const { return m_instanceCount * m_audioPortsOut.size(); }
    virtual sample_t **getAudioInputBuffers() { return m_inputBuffers; }
    virtual sample_t **getAudioOutputBuffers() { return m_outputBuffers; }

    virtual size_t getControlOutputCount() const { return m_controlPortsOut.size(); }
    virtual float getControlOutputValue(size_t n) const;

    virtual bool isBypassed() const { return m_bypassed; }
    virtual void setBypassed(bool bypassed) { m_bypassed = bypassed; }

    virtual size_t getLatency();

    virtual void silence();
    virtual void setIdealChannelCount(size_t channels); // may re-instantiate

    virtual std::string getType() const { return "LADSPA Real-Time Plugin"; }

protected:
    // To be constructed only by LADSPAPluginFactory
    friend class LADSPAPluginFactory;

    // Constructor that creates the buffers internally
    // 
    LADSPAPluginInstance(RealTimePluginFactory *factory,
			 int client,
			 QString identifier,
                         int position,
			 unsigned long sampleRate,
			 size_t blockSize,
			 int idealChannelCount,
                         const LADSPA_Descriptor* descriptor);

    void init(int idealChannelCount = 0);
    void instantiate(unsigned long sampleRate);
    void cleanup();
    void activate();
    void deactivate();

    // Connection of data (and behind the scenes control) ports
    //
    void connectPorts();
    
    int                        m_client;
    int                        m_position;
    std::vector<LADSPA_Handle> m_instanceHandles;
    size_t                     m_instanceCount;
    const LADSPA_Descriptor   *m_descriptor;

    std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsIn;
    std::vector<std::pair<unsigned long, LADSPA_Data*> > m_controlPortsOut;

    std::vector<int>          m_audioPortsIn;
    std::vector<int>          m_audioPortsOut;

    size_t                    m_blockSize;
    sample_t                **m_inputBuffers;
    sample_t                **m_outputBuffers;
    bool                      m_ownBuffers;
    size_t                    m_sampleRate;
    float                    *m_latencyPort;
    bool                      m_run;
    
    bool                      m_bypassed;
};

#endif // _LADSPAPLUGININSTANCE_H_