Traverso/cvs/traverso/src/plugins/PluginChain.h

/*
Copyright (C) 2006 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 PLUGIN_CHAIN_H
#define PLUGIN_CHAIN_H

#include <ContextItem.h>
#include <QList>
#include <QDomNode>
#include "Plugin.h"
#include "GainEnvelope.h"

class Sheet;
class AudioBus;

class PluginChain : public ContextItem
{
        Q_OBJECT
        
public:
        PluginChain(ContextItem* parent);
        PluginChain(ContextItem* parent, Sheet* sheet);
        ~PluginChain();
        
        QDomNode get_state(QDomDocument doc);
        int set_state(const QDomNode & node );
        
        Command* add_plugin(Plugin* plugin, bool historable=true);
        Command* remove_plugin(Plugin* plugin, bool historable=true);
        void process_pre_fader(AudioBus* bus, unsigned long nframes);
        int process_post_fader(AudioBus* bus, unsigned long nframes);
//      void process_fader(audio_sample_t* buffer, nframes_t pos, nframes_t nframes) {m_fader->process_gain(buffer, pos, nframes);}
        
        void set_sheet(Sheet* sheet);
        
        QList<Plugin* > get_plugin_list() {return m_pluginList;}
        GainEnvelope* get_fader() const {return m_fader;}
        
private:
        QList<Plugin* > m_pluginList;
        GainEnvelope*   m_fader;
        Sheet*          m_sheet;
        
signals:
        void pluginAdded(Plugin* plugin);
        void pluginRemoved(Plugin* plugin);

private slots:
        void private_add_plugin(Plugin* plugin);
        void private_remove_plugin(Plugin* plugin);


};

inline void PluginChain::process_pre_fader(AudioBus * bus, unsigned long nframes)
{
        return;
        for (int i=0; i<m_pluginList.size(); ++i) {
                Plugin* plugin = m_pluginList.at(i);
                if (plugin == m_fader) return;
                plugin->process(bus, nframes);
        }
}

inline int PluginChain::process_post_fader(AudioBus * bus, unsigned long nframes)
{
        if (!m_pluginList.size()) {
                return 0;
        }
        
        for (int i=0; i<m_pluginList.size(); ++i) {
                Plugin* plugin = m_pluginList.at(i);
//              if (plugin == m_fader) continue;
                plugin->process(bus, nframes);
        }
        
        return 1;
}

#endif

//eof

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