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// -*- c-basic-offset: 4 -*-
/*
Rosegarden
A sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <bownie@bownie.com>
The moral right of the authors to claim authorship of this work
has been asserted.
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.
*/
#ifndef _PLUGIN_FACTORY_H_
#define _PLUGIN_FACTORY_H_
#include <qstring.h>
#include <vector>
#include "MappedCommon.h"
namespace Rosegarden
{
class RunnablePluginInstance;
class MappedPluginSlot;
class PluginFactory
{
public:
static PluginFactory *instance(QString pluginType);
static PluginFactory *instanceFor(QString identifier);
static void enumerateAllPlugins(MappedObjectPropertyList &);
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(MappedObjectPropertyList &list) = 0;
/**
* Populate the given plugin slot with information about its
* plugin. This is called from the plugin slot's set method
* when it's been asked to set its plugin identifier. This
* method should also destroy and recreate the plugin slot's
* port child objects.
*/
virtual void populatePluginSlot(QString identifier,
MappedPluginSlot &slot) = 0;
/**
* Instantiate a plugin.
*/
virtual RunnablePluginInstance *instantiatePlugin(QString identifier,
int instrumentId,
int position,
unsigned int sampleRate,
unsigned int blockSize,
unsigned int channels) = 0;
protected:
PluginFactory() { }
// for call by RunnablePluginInstance dtor
virtual void releasePlugin(RunnablePluginInstance *, QString identifier) = 0;
friend class RunnablePluginInstance;
static int m_sampleRate;
};
}
#endif
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