ModelTransformer.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.
   
    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 _TRANSFORMER_H_
#define _TRANSFORMER_H_

#include "base/Thread.h"

#include "data/model/Model.h"

#include "Transform.h"

class ModelTransformer : public Thread
{
public:
    virtual ~ModelTransformer();

    typedef std::vector<Model *> Models;

    class Input {
    public:
        Input(Model *m) : m_model(m), m_channel(-1) { }
        Input(Model *m, int c) : m_model(m), m_channel(c) { }

        Model *getModel() const { return m_model; }
        void setModel(Model *m) { m_model = m; }

        int getChannel() const { return m_channel; }
        void setChannel(int c) { m_channel = c; }

    protected:
        Model *m_model;
        int m_channel;
    };

    void abandon() { m_abandoned = true; }

    Model *getInputModel()  { return m_input.getModel(); }

    int getInputChannel() { return m_input.getChannel(); }

    Models getOutputModels() { return m_outputs; }

    Models detachOutputModels() { 
        m_detached = true; 
        return getOutputModels(); 
    }

    virtual Models getAdditionalOutputModels() { return Models(); }

    virtual bool willHaveAdditionalOutputModels() { return false; }

    virtual Models detachAdditionalOutputModels() { 
        m_detachedAdd = true;
        return getAdditionalOutputModels();
    }

    QString getMessage() const { return m_message; }

protected:
    ModelTransformer(Input input, const Transform &transform);
    ModelTransformer(Input input, const Transforms &transforms);

    Transforms m_transforms;
    Input m_input; // I don't own the model in this
    Models m_outputs; // I own this, unless...
    bool m_detached; // ... this is true.
    bool m_detachedAdd;
    bool m_abandoned;
    QString m_message;
};

#endif