CaptureFactory.h

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/*
 * This file is part of ALVAR, A Library for Virtual and Augmented Reality.
 *
 * Copyright 2007-2012 VTT Technical Research Centre of Finland
 *
 * Contact: VTT Augmented Reality Team <alvar.info@vtt.fi>
 *          <http://www.vtt.fi/multimedia/alvar.html>
 *
 * ALVAR is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with ALVAR; if not, see
 * <http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html>.
 */

#ifndef CAPTUREFACTORY_H
#define CAPTUREFACTORY_H

#include "Alvar.h"
#include "Capture.h"
#include "CaptureDevice.h"
#include "Platform.h"
#include "Util.h"

namespace alvar {

class CaptureFactoryPrivate;

class ALVAR_EXPORT CaptureFactory
{
public:
    static CaptureFactory *instance();

    typedef std::vector<std::string> CapturePluginVector;

    CapturePluginVector enumeratePlugins();

    typedef std::vector<CaptureDevice> CaptureDeviceVector;

    CaptureDeviceVector enumerateDevices(const std::string &captureType = "");

    Capture *createCapture(const CaptureDevice captureDevice);

protected:
    ~CaptureFactory();

private:
    class CaptureFactoryDestroyer
    {
    public:
        CaptureFactoryDestroyer(CaptureFactory *instance = NULL) : mInstance(instance) {}
        ~CaptureFactoryDestroyer() {delete mInstance;}
        void set(CaptureFactory *instance) {mInstance = instance;}
    private:
        CaptureFactory *mInstance;
    };

    // private constructors and assignment operator for singleton implementation
    CaptureFactory();
    CaptureFactory(const CaptureFactory&);
    CaptureFactory &operator=(const CaptureFactory&);

    // static members for singleton implementation
    static CaptureFactory *mInstance;
    static Mutex mMutex;
    static CaptureFactoryDestroyer mDestroyer;

    // members
    CaptureFactoryPrivate *d;
};

} // namespace alvar

#endif