Traverso/cvs/traverso/src/plugins/native/GainEnvelope.h

/*
Copyright (C) 2007 Remon Sijrier

This file is part of Traverso

Traverso 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.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

*/


#ifndef GAIN_ENVELOPE_H
#define GAIN_ENVELOPE_H

#include "Plugin.h"
#include "Curve.h"
#include "Mixer.h"

class Sheet;

class GainEnvelope : public Plugin
{
        Q_OBJECT
        
public:
        GainEnvelope(Sheet* sheet);
        ~GainEnvelope(){};

        QDomNode get_state(QDomDocument doc);
        int set_state(const QDomNode & node );
        void process(AudioBus* bus, unsigned long nframes);
        void process_gain(audio_sample_t** buffer, const TimeRef& startlocation, const TimeRef& endlocation, nframes_t nframes, uint channels);
        
        void set_sheet(Sheet* sheet);
        void set_gain(float gain) {m_gain = gain;}
        
        float get_gain() const {return m_gain;}
        Curve* get_curve() const;
        QString get_name();
        
private:
        float m_gain;
};


inline void GainEnvelope::process_gain(audio_sample_t** buffer, const TimeRef& startlocation, const TimeRef& endlocation, nframes_t nframes, uint channels)
{
        PluginControlPort* port = m_controlPorts.at(0);
        
        if (port->use_automation()) {
                port->get_curve()->process(buffer, startlocation, endlocation, nframes, channels, m_gain);
        } else {
                for (uint chan=0; chan<channels; ++chan) {
                        Mixer::apply_gain_to_buffer(buffer[chan], nframes, m_gain);
                }
        }
}


#endif

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