ModelTransformerFactory.h

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/* -*- 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 and QMUL.
   
    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 _MODEL_TRANSFORMER_FACTORY_H_
#define _MODEL_TRANSFORMER_FACTORY_H_

#include "Transform.h"
#include "TransformDescription.h"

#include "ModelTransformer.h"

#include <map>
#include <set>

namespace Vamp { class PluginBase; }

class AudioCallbackPlaySource;

class ModelTransformerFactory : public QObject
{
    Q_OBJECT

public:
    virtual ~ModelTransformerFactory();

    static ModelTransformerFactory *getInstance();

    ModelTransformer::Input
    getConfigurationForTransform(Transform &transform,
                                 const std::vector<Model *> &candidateInputModels,
                                 Model *defaultInputModel,
                                 AudioCallbackPlaySource *source = 0,
                                 size_t startFrame = 0,
                                 size_t duration = 0);
    
    Model *transform(const Transform &transform,
                     const ModelTransformer::Input &input,
                     QString &message);

protected slots:
    void transformerFinished();

    void modelAboutToBeDeleted(Model *);

protected:
    ModelTransformer *createTransformer(const Transform &transform,
                                        const ModelTransformer::Input &input);

    typedef std::map<TransformId, QString> TransformerConfigurationMap;
    TransformerConfigurationMap m_lastConfigurations;

    typedef std::set<ModelTransformer *> TransformerSet;
    TransformerSet m_runningTransformers;

    bool getChannelRange(TransformId identifier,
                         Vamp::PluginBase *plugin, int &min, int &max);

    static ModelTransformerFactory *m_instance;
};


#endif

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