AUD_EnvelopeFactory.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * Copyright 2009-2011 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * Audaspace 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.
 *
 * AudaSpace 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Audaspace; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef AUD_ENVELOPEFACTORY
#define AUD_ENVELOPEFACTORY

#include "AUD_EffectFactory.h"
class AUD_CallbackIIRFilterReader;
struct EnvelopeParameters;

class AUD_EnvelopeFactory : public AUD_EffectFactory
{
private:
    const float m_attack;

    const float m_release;

    const float m_threshold;

    const float m_arthreshold;

    // hide copy constructor and operator=
    AUD_EnvelopeFactory(const AUD_EnvelopeFactory&);
    AUD_EnvelopeFactory& operator=(const AUD_EnvelopeFactory&);

public:
    AUD_EnvelopeFactory(AUD_Reference<AUD_IFactory> factory, float attack, float release,
                        float threshold, float arthreshold);

    virtual AUD_Reference<AUD_IReader> createReader();

    static sample_t envelopeFilter(AUD_CallbackIIRFilterReader* reader, EnvelopeParameters* param);
    static void endEnvelopeFilter(EnvelopeParameters* param);
};

#endif //AUD_ENVELOPEFACTORY