view transform/ModelTransformerFactory.h @ 848:539740f231fa tonioni_multi_transform

Toward running multiple transforms (from same plugin + params) at once

/* -*- 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 "FeatureExtractionModelTransformer.h"

#include "ModelTransformer.h"

#include <vamp-hostsdk/PluginBase.h>

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

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,
                               Vamp::PluginBase *plugin,
                               Model *&inputModel,
                               AudioPlaySource *source,
                               size_t startFrame,
                               size_t duration,
                               const QMap<QString, Model *> &modelMap,
                               QStringList candidateModelNames,
                               QString defaultModelName) = 0;
    };

    /**
     * Fill out the configuration for the given transform (may include
     * asking the user by calling back on the UserConfigurator).
     * Returns the selected input model and channel if the transform
     * is acceptable, or an input with a null model if the operation
     * should be cancelled.  Audio play source may be used to audition
     * effects plugins, if provided.
     */
    ModelTransformer::Input
    getConfigurationForTransform(Transform &transform,
                                 const std::vector<Model *> &candidateInputModels,
                                 Model *defaultInputModel,
                                 AudioPlaySource *source = 0,
                                 size_t startFrame = 0,
                                 size_t duration = 0,
                                 UserConfigurator *configurator = 0);
    
    /**
     * Return the output model resulting from applying the named
     * transform to the given input model.  The transform may still be
     * working in the background when the model is returned; check the
     * output model's isReady completion status for more details.
     *
     * If the transform is unknown or the input model is not an
     * appropriate type for the given transform, or if some other
     * problem occurs, return 0.  Set message if there is any error or
     * warning to report.
     * 
     * The returned model is owned by the caller and must be deleted
     * when no longer needed.
     */
    Model *transform(const Transform &transform,
                     const ModelTransformer::Input &input,
                     QString &message);

    /**
     * Return the multiple output models resulting from applying the
     * named transforms to the given input model.  The transforms may
     * differ only in output identifier for the plugin: they must all
     * use the same plugin, parameters, and programs. The plugin will
     * be run once only, but more than one output will be harvested
     * (as appropriate). Models will be returned in the same order as
     * the transforms were given. The plugin may still be working in
     * the background when the model is returned; check the output
     * models' isReady completion statuses for more details.
     *
     * If a transform is unknown or the transforms are insufficiently
     * closely related or the input model is not an appropriate type
     * for the given transform, or if some other problem occurs,
     * return 0.  Set message if there is any error or warning to
     * report.
     * 
     * The returned models are owned by the caller and must be deleted
     * when no longer needed.
     */
    std::vector<Model *> transformMultiple(const Transforms &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;

    static ModelTransformerFactory *m_instance;
	/** 
	* allows the  FeatureExtractionModelTransformer output model to be selected externally, 
	* but only in case of the need for NoteModel or FlexiNoteModel 
	*/
	FeatureExtractionModelTransformer::PreferredOutputModel m_preferredOutputModel ;
};


#endif