annotate plugin/RealTimePluginFactory.h @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- 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 file copyright 2006 Chris Cannam.
    
    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.
*/

#ifndef _REALTIME_PLUGIN_FACTORY_H_
#define _REALTIME_PLUGIN_FACTORY_H_

#include <QString>
#include <vector>

#include "base/Debug.h"

class RealTimePluginInstance;

class RealTimePluginDescriptor
{
public:
    std::string name;
    std::string label;
    std::string maker;
    std::string copyright;
    std::string category;
    bool isSynth;
    unsigned int parameterCount;
    unsigned int audioInputPortCount;
    unsigned int audioOutputPortCount;
    unsigned int controlOutputPortCount;
    std::vector<std::string> controlOutputPortNames;
};

class RealTimePluginFactory
{
public:
    virtual ~RealTimePluginFactory();

    static RealTimePluginFactory *instance(QString pluginType);
    static RealTimePluginFactory *instanceFor(QString identifier);
    static std::vector<QString> getAllPluginIdentifiers();
    static void enumerateAllPlugins(std::vector<QString> &);

    static void setSampleRate(int sampleRate) { m_sampleRate = sampleRate; }

    /**
     * Look up the plugin path and find the plugins in it.  Called 
     * automatically after construction of a factory.
     */
    virtual void discoverPlugins() = 0;

    /**
     * Return a reference to a list of all plugin identifiers that can
     * be created by this factory.
     */
    virtual const std::vector<QString> &getPluginIdentifiers() const = 0;

    /**
     * Append to the given list descriptions of all the available
     * plugins and their ports.  This is in a standard format, see
     * the LADSPA implementation for details.
     */
    virtual void enumeratePlugins(std::vector<QString> &list) = 0;

    /**
     * Get some basic information about a plugin (rapidly).
     */
    virtual const RealTimePluginDescriptor *getPluginDescriptor(QString identifier) const = 0;

    /**
     * Instantiate a plugin.
     */
    virtual RealTimePluginInstance *instantiatePlugin(QString identifier,
						      int clientId,
						      int position,
						      unsigned int sampleRate,
						      unsigned int blockSize,
						      unsigned int channels) = 0;

    /**
     * Get category metadata about a plugin (without instantiating it).
     */
    virtual QString getPluginCategory(QString identifier) = 0;

protected:
    RealTimePluginFactory() { }

    // for call by RealTimePluginInstance dtor
    virtual void releasePlugin(RealTimePluginInstance *, QString identifier) = 0;
    friend class RealTimePluginInstance;

    static int m_sampleRate;
};

#endif