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 SV_MODEL_TRANSFORMER_FACTORY_H
#define SV_MODEL_TRANSFORMER_FACTORY_H

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

#include "ModelTransformer.h"

#include <vamp-hostsdk/PluginBase.h>

#include <QMap>
#include <QMutex>
#include <map>
#include <set>
#include <vector>
#include <memory>

class AudioPlaySource;

class ModelTransformerFactory : public QObject
{
    Q_OBJECT

public:
    virtual ~ModelTransformerFactory();

    static ModelTransformerFactory *getInstance();

    class UserConfigurator {
    public:
        virtual bool configure(ModelTransformer::Input &input,
                               Transform &transform,
                               std::shared_ptr<Vamp::PluginBase> plugin,
                               ModelId &inputModel,
                               AudioPlaySource *source,
                               sv_frame_t startFrame,
                               sv_frame_t duration,
                               const QMap<QString, ModelId> &modelMap,
                               QStringList candidateModelNames,
                               QString defaultModelName) = 0;
    };

    ModelTransformer::Input
    getConfigurationForTransform(Transform &transform,
                                 std::vector<ModelId> candidateInputModels,
                                 ModelId defaultInputModel,
                                 AudioPlaySource *source = 0,
                                 sv_frame_t startFrame = 0,
                                 sv_frame_t duration = 0,
                                 UserConfigurator *configurator = 0);

    class AdditionalModelHandler {
    public:
        virtual ~AdditionalModelHandler() { }

        // Exactly one of these functions will be called
        virtual void moreModelsAvailable(std::vector<ModelId> models) = 0;
        virtual void noMoreModelsAvailable() = 0;
    };
    
    ModelId transform(const Transform &transform,
                      const ModelTransformer::Input &input,
                      QString &message,
                      AdditionalModelHandler *handler = 0);

    std::vector<ModelId> transformMultiple(const Transforms &transform,
                                           const ModelTransformer::Input &input,
                                           QString &message,
                                           AdditionalModelHandler *handler = 0);

    bool haveRunningTransformers() const;
    
signals:
    void transformFailed(QString transformName, QString message);
                                                                               
protected slots:
    void transformerFinished();

protected:
    ModelTransformer *createTransformer(const Transforms &transforms,
                                        const ModelTransformer::Input &input);

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

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

    typedef std::map<ModelTransformer *, AdditionalModelHandler *> HandlerMap;
    HandlerMap m_handlers;

    static ModelTransformerFactory *m_instance;
};


#endif