Chris@320: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@320: 
Chris@320: /*
Chris@320:     Sonic Visualiser
Chris@320:     An audio file viewer and annotation editor.
Chris@320:     Centre for Digital Music, Queen Mary, University of London.
Chris@320:     This file copyright 2006 Chris Cannam and QMUL.
Chris@320:    
Chris@320:     This program is free software; you can redistribute it and/or
Chris@320:     modify it under the terms of the GNU General Public License as
Chris@320:     published by the Free Software Foundation; either version 2 of the
Chris@320:     License, or (at your option) any later version.  See the file
Chris@320:     COPYING included with this distribution for more information.
Chris@320: */
Chris@320: 
Chris@331: #ifndef _MODEL_TRANSFORMER_FACTORY_H_
Chris@331: #define _MODEL_TRANSFORMER_FACTORY_H_
Chris@320: 
Chris@331: #include "Transform.h"
Chris@329: #include "TransformDescription.h"
Chris@329: 
Chris@331: #include "ModelTransformer.h"
Chris@331: 
Chris@320: #include <map>
Chris@320: #include <set>
Chris@320: 
Chris@320: namespace Vamp { class PluginBase; }
Chris@320: 
Chris@320: class AudioCallbackPlaySource;
Chris@320: 
Chris@331: class ModelTransformerFactory : public QObject
Chris@320: {
Chris@320:     Q_OBJECT
Chris@320: 
Chris@320: public:
Chris@331:     virtual ~ModelTransformerFactory();
Chris@320: 
Chris@331:     static ModelTransformerFactory *getInstance();
Chris@320: 
Chris@320:     /**
Chris@383:      * Fill out the configuration for the given transform (by asking
Chris@383:      * the user, most likely).  Returns the selected input model and
Chris@383:      * channel if the transform is acceptable, or an input with a null
Chris@383:      * model if the operation should be cancelled.  Audio callback
Chris@383:      * play source may be used to audition effects plugins, if
Chris@383:      * provided.
Chris@320:      */
Chris@383:     ModelTransformer::Input
Chris@383:     getConfigurationForTransform(Transform &transform,
Chris@383:                                  const std::vector<Model *> &candidateInputModels,
Chris@383:                                  Model *defaultInputModel,
Chris@383:                                  AudioCallbackPlaySource *source = 0,
Chris@383:                                  size_t startFrame = 0,
Chris@383:                                  size_t duration = 0);
Chris@383:     
Chris@320:     /**
Chris@320:      * Return the output model resulting from applying the named
Chris@320:      * transform to the given input model.  The transform may still be
Chris@320:      * working in the background when the model is returned; check the
Chris@320:      * output model's isReady completion status for more details.
Chris@320:      *
Chris@320:      * If the transform is unknown or the input model is not an
Chris@320:      * appropriate type for the given transform, or if some other
Chris@383:      * problem occurs, return 0.  Set message if there is any error or
Chris@383:      * warning to report.
Chris@320:      * 
Chris@320:      * The returned model is owned by the caller and must be deleted
Chris@320:      * when no longer needed.
Chris@320:      */
Chris@383:     Model *transform(const Transform &transform,
Chris@383:                      const ModelTransformer::Input &input,
Chris@383:                      QString &message);
Chris@320: 
Chris@320: protected slots:
Chris@331:     void transformerFinished();
Chris@320: 
Chris@320:     void modelAboutToBeDeleted(Model *);
Chris@320: 
Chris@320: protected:
Chris@383:     ModelTransformer *createTransformer(const Transform &transform,
Chris@383:                                         const ModelTransformer::Input &input);
Chris@320: 
Chris@329:     typedef std::map<TransformId, QString> TransformerConfigurationMap;
Chris@328:     TransformerConfigurationMap m_lastConfigurations;
Chris@320: 
Chris@331:     typedef std::set<ModelTransformer *> TransformerSet;
Chris@328:     TransformerSet m_runningTransformers;
Chris@320: 
Chris@329:     bool getChannelRange(TransformId identifier,
Chris@320:                          Vamp::PluginBase *plugin, int &min, int &max);
Chris@320: 
Chris@331:     static ModelTransformerFactory *m_instance;
Chris@320: };
Chris@320: 
Chris@320: 
Chris@320: #endif