view plugin/LADSPAPluginInstance.h @ 1394:9ef1cc26024c

Add Range01 normalisation method to ColumnOp. This is the normalisation that is actually used in the Colour 3D Plot layer historically when column normalisation is enabled (not Max1 after all).

/* -*- 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"
#include "base/BaseTypes.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 RealTime &rt, int count = 0);

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

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

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

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

    virtual sv_frame_t getLatency();

    virtual void silence();
    virtual void setIdealChannelCount(int 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,
			 sv_samplerate_t sampleRate,
			 int blockSize,
			 int idealChannelCount,
                         const LADSPA_Descriptor* descriptor);

    void init(int idealChannelCount = 0);
    void instantiate(sv_samplerate_t 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;
    int                        m_instanceCount;
    const LADSPA_Descriptor   *m_descriptor;

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

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

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

#endif // _LADSPAPLUGININSTANCE_H_