root/trunk/libs/hydrogen/src/action.cpp @ 580

/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * 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.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <QObject>

#include <hydrogen/audio_engine.h>
#include <hydrogen/event_queue.h>
#include <hydrogen/hydrogen.h>
#include <gui/src/HydrogenApp.h>

#include <hydrogen/instrument.h>
#include <hydrogen/Song.h>


#include <hydrogen/Preferences.h>
#include <hydrogen/action.h>
#include <map>

ActionManager* ActionManager::instance = NULL;

using namespace H2Core;

/* Class Action */

QString Action::getType(){
        return type;
}



void Action::setParameter1( QString text ){
        parameter1 = text;
}

void Action::setParameter2( QString text ){
        parameter2 = text;
}

QString Action::getParameter1(){
        return parameter1;
}

QString Action::getParameter2(){
        return parameter2;
}

Action::Action( QString s ) : Object( "Action" ) {
        type = s;
        QString parameter1 = "0";
        QString parameter2 = "0" ;
}


/* Class ActionManager */


ActionManager::ActionManager() : Object( "ActionManager" ) {
        INFOLOG( "ActionManager Init" );
        
        actionList <<""
        << "PLAY" 
        << "PLAY_TOGGLE"
        << "STOP"
        << "PAUSE"
        << "MUTE"
        << "UNMUTE"
        << "MUTE_TOGGLE"
        << ">>_NEXT_BAR"
        << "<<_PREVIOUS_BAR"
        << "BPM_INCR"
        << "BPM_DECR"
        << "BPM_CC_RELATIVE"
        << "MASTER_VOLUME_RELATIVE"
        << "MASTER_VOLUME_ABSOLUTE"
        << "STRIP_VOLUME_RELATIVE"
        << "STRIP_VOLUME_ABSOLUTE"
        << "EFFECT1_LEVEL_RELATIVE"
        << "EFFECT2_LEVEL_RELATIVE"
        << "EFFECT3_LEVEL_RELATIVE"
        << "EFFECT4_LEVEL_RELATIVE"
        << "EFFECT1_LEVEL_ABSOLUTE"
        << "EFFECT2_LEVEL_ABSOLUTE"
        << "EFFECT3_LEVEL_ABSOLUTE"
        << "EFFECT4_LEVEL_ABSOLUTE"
        << "PAN_RELATIVE"
        << "PAN_ABSOULTE"
        << "BEATCOUNTER"
        << "TAP_TEMPO";

        eventList << ""
        << "MMC_PLAY"
        << "MMC_DEFERRED_PLAY"
        << "MMC_STOP"
        << "MMC_FAST_FORWARD"
        << "MMC_REWIND"
        << "MMC_RECORD_STROBE"
        << "MMC_RECORD_EXIT"
        << "MMC_PAUSE"
        << "NOTE"
        << "CC";
}


ActionManager::~ActionManager(){
        INFOLOG( "ActionManager delete" );
        instance = NULL;
}


/// Return an instance of ActionManager
ActionManager* ActionManager::getInstance()
{
        if ( instance == NULL ) {
                instance = new ActionManager();
        }
        
        return instance;
}

QStringList ActionManager::getActionList(){
        return actionList;
}

QStringList ActionManager::getEventList(){
        return eventList;
}



bool setAbsoluteFXLevel( int nLine, int fx_channel , int fx_param)
{
        //helper function to set fx levels
                        
        Hydrogen::get_instance()->setSelectedInstrumentNumber( nLine );

        Hydrogen *engine = Hydrogen::get_instance();
        Song *song = engine->getSong();
        InstrumentList *instrList = song->get_instrument_list();
        Instrument *instr = instrList->get( nLine );
        if ( instr == NULL) return false;

        if( fx_param != 0 ){
                        instr->set_fx_level(  ( (float) (fx_param / 127.0 ) ), fx_channel );
        } else {
                        instr->set_fx_level( 0 , fx_channel );
        }
                
        Hydrogen::get_instance()->setSelectedInstrumentNumber(nLine);
        
        return true;

}

bool ActionManager::handleAction( Action * pAction ){

        Hydrogen *pEngine = Hydrogen::get_instance();

        /* 
                return false if action is null 
                (for example if no Action exists for an event)
        */
        if( pAction == NULL )   return false;

        QString sActionString = pAction->getType();

        
        if( sActionString == "PLAY" )
        {
                int nState = pEngine->getState();
                if ( nState == STATE_READY ){
                        pEngine->sequencer_play();
                }
                return true;
        }

        if( sActionString == "PLAY_TOGGLE" )
        {
                int nState = pEngine->getState();
                switch ( nState ) 
                {
                        case STATE_READY:
                                pEngine->sequencer_play();
                                break;

                        case STATE_PLAYING:
                                pEngine->sequencer_stop();
                                break;

                        default:
                                ERRORLOG( "[Hydrogen::ActionManager(PLAY): Unhandled case" );
                }

                return true;
        }

        if( sActionString == "PAUSE" )
        {       
                pEngine->sequencer_stop();
                return true;
        }

        if( sActionString == "STOP" )
        {       
                pEngine->sequencer_stop();
                pEngine->setPatternPos( 0 );
                return true;
        }

        if( sActionString == "MUTE" ){
                //mutes the master, not a single strip
                pEngine->getSong()->__is_muted = true;
                return true;
        }

        if( sActionString == "UNMUTE" ){
                pEngine->getSong()->__is_muted = false;
                return true;
        }

        if( sActionString == "MUTE_TOGGLE" ){
                pEngine->getSong()->__is_muted = !Hydrogen::get_instance()->getSong()->__is_muted;
                return true;
        }

        if( sActionString == "BEATCOUNTER" ){
                pEngine->handleBeatCounter();
                return true;
        }

        if( sActionString == "TAP_TEMPO" ){
                pEngine->onTapTempoAccelEvent();
                return true;
        }



        
        if( sActionString == "EFFECT1_LEVEL_ABSOLUTE" ){
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int fx_param = pAction->getParameter2().toInt(&ok,10);
                setAbsoluteFXLevel( nLine, 0 , fx_param );
        }

        if( sActionString == "EFFECT2_LEVEL_ABSOLUTE" ){
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int fx_param = pAction->getParameter2().toInt(&ok,10);
                setAbsoluteFXLevel( nLine, 1 , fx_param );
        }

        if( sActionString == "EFFECT3_LEVEL_ABSOLUTE" ){
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int fx_param = pAction->getParameter2().toInt(&ok,10);
                setAbsoluteFXLevel( nLine, 2 , fx_param );
        }

        if( sActionString == "EFFECT4_LEVEL_ABSOLUTE" ){
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int fx_param = pAction->getParameter2().toInt(&ok,10);
                setAbsoluteFXLevel( nLine, 3 , fx_param );
        }
        

        
        

        if( sActionString == "MASTER_VOLUME_RELATIVE" ){
                //increments/decrements the volume of the whole song    
                
                bool ok;
                int vol_param = pAction->getParameter2().toInt(&ok,10);
                        
                Hydrogen *engine = Hydrogen::get_instance();
                Song *song = engine->getSong();



                if( vol_param != 0 ){
                                if ( vol_param == 1 && song->get_volume() < 1.5 ){
                                        song->set_volume( song->get_volume() + 0.05 );  
                                }  else  {
                                        if( song->get_volume() >= 0.0 ){
                                                song->set_volume( song->get_volume() - 0.05 );
                                        }
                                }
                } else {
                        song->set_volume( 0 );
                }

        }

        

        if( sActionString == "MASTER_VOLUME_ABSOLUTE" ){
                //sets the volume of a mixer strip to a given level (percentage)

                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int vol_param = pAction->getParameter2().toInt(&ok,10);
                        

                Hydrogen *engine = Hydrogen::get_instance();
                Song *song = engine->getSong();


                if( vol_param != 0 ){
                                song->set_volume( 1.5* ( (float) (vol_param / 127.0 ) ));
                } else {
                                song->set_volume( 0 );
                }

        }

        

        if( sActionString == "STRIP_VOLUME_RELATIVE" ){
                //increments/decrements the volume of one mixer strip   
                
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int vol_param = pAction->getParameter2().toInt(&ok,10);
                        
                Hydrogen::get_instance()->setSelectedInstrumentNumber( nLine );

                Hydrogen *engine = Hydrogen::get_instance();
                Song *song = engine->getSong();
                InstrumentList *instrList = song->get_instrument_list();

                Instrument *instr = instrList->get( nLine );

                if ( instr == NULL) return 0;

                if( vol_param != 0 ){
                                if ( vol_param == 1 && instr->get_volume() < 1.5 ){
                                        instr->set_volume( instr->get_volume() + 0.1 );  
                                }  else  {
                                        if( instr->get_volume() >= 0.0 ){
                                                instr->set_volume( instr->get_volume() - 0.1 );
                                        }
                                }
                } else {
                        instr->set_volume( 0 );
                }

                Hydrogen::get_instance()->setSelectedInstrumentNumber(nLine);
        }

        if( sActionString == "STRIP_VOLUME_ABSOLUTE" ){
                //sets the volume of a mixer strip to a given level (percentage)

                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int vol_param = pAction->getParameter2().toInt(&ok,10);
                        
                Hydrogen::get_instance()->setSelectedInstrumentNumber( nLine );

                Hydrogen *engine = Hydrogen::get_instance();
                Song *song = engine->getSong();
                InstrumentList *instrList = song->get_instrument_list();

                Instrument *instr = instrList->get( nLine );

                if ( instr == NULL) return 0;

                if( vol_param != 0 ){
                                instr->set_volume( 1.5* ( (float) (vol_param / 127.0 ) ));
                } else {
                                instr->set_volume( 0 );
                }

                Hydrogen::get_instance()->setSelectedInstrumentNumber(nLine);
        }

        
        if( sActionString == "PAN_ABSOULTE" ){
                
                 // sets the absolute panning of a given mixer channel
                
                
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int pan_param = pAction->getParameter2().toInt(&ok,10);

                
                float pan_L;
                float pan_R;

                Hydrogen *engine = Hydrogen::get_instance();
                engine->setSelectedInstrumentNumber( nLine );
                Song *song = engine->getSong();
                InstrumentList *instrList = song->get_instrument_list();

                Instrument *instr = instrList->get( nLine );
                
                if( instr == NULL )
                        return false;
                
                pan_L = instr->get_pan_l();
                pan_R = instr->get_pan_r();

                // pan
                float fPanValue = 0.0;
                if (pan_R == 1.0) {
                        fPanValue = 1.0 - (pan_L / 2.0);
                }
                else {
                        fPanValue = pan_R / 2.0;
                }

                
                fPanValue = 1 * ( ((float) pan_param) / 127.0 );


                if (fPanValue >= 0.5) {
                        pan_L = (1.0 - fPanValue) * 2;
                        pan_R = 1.0;
                }
                else {
                        pan_L = 1.0;
                        pan_R = fPanValue * 2;
                }


                instr->set_pan_l( pan_L );
                instr->set_pan_r( pan_R );

                Hydrogen::get_instance()->setSelectedInstrumentNumber(nLine);

                return true;
        }

        if( sActionString == "PAN_RELATIVE" ){
                
                 // changes the panning of a given mixer channel
                // this is useful if the panning is set by a rotary control knob
                
                
                bool ok;
                int nLine = pAction->getParameter1().toInt(&ok,10);
                int pan_param = pAction->getParameter2().toInt(&ok,10);

                
                float pan_L;
                float pan_R;

                Hydrogen *engine = Hydrogen::get_instance();
                engine->setSelectedInstrumentNumber( nLine );
                Song *song = engine->getSong();
                InstrumentList *instrList = song->get_instrument_list();

                Instrument *instr = instrList->get( nLine );
                
                if( instr == NULL )
                        return false;
                
                pan_L = instr->get_pan_l();
                pan_R = instr->get_pan_r();

                // pan
                float fPanValue = 0.0;
                if (pan_R == 1.0) {
                        fPanValue = 1.0 - (pan_L / 2.0);
                }
                else {
                        fPanValue = pan_R / 2.0;
                }

                if( pan_param == 1 && fPanValue < 1 ){
                        fPanValue += 0.05;
                }

                if( pan_param != 1 && fPanValue > 0 ){
                        fPanValue -= 0.05;
                }

                if (fPanValue >= 0.5) {
                        pan_L = (1.0 - fPanValue) * 2;
                        pan_R = 1.0;
                }
                else {
                        pan_L = 1.0;
                        pan_R = fPanValue * 2;
                }


                instr->set_pan_l( pan_L );
                instr->set_pan_r( pan_R );

                Hydrogen::get_instance()->setSelectedInstrumentNumber(nLine);

                return true;
        }
        

        if( sActionString == "BPM_CC_RELATIVE" ){
                /*
                 * increments/decrements the BPM
                 * this is useful if the bpm is set by a rotary control knob
                */

                AudioEngine::get_instance()->lock( "Action::BPM_CC_RELATIVE" );

                int mult = 1;   

                //second parameter of cc command
                //this value should be 1 to decrement and something other then 1 to increment the bpm
                int cc_param = 1;

                //this Action should be triggered only by CC commands

                bool ok;
                mult = pAction->getParameter1().toInt(&ok,10);
                cc_param = pAction->getParameter2().toInt(&ok,10);
                        


                Song* pSong = pEngine->getSong();


                
                if ( cc_param == 1 && pSong->__bpm  < 300) {
                        pEngine->setBPM( pSong->__bpm + 1*mult );
                }


                if ( cc_param != 1 && pSong->__bpm  > 40 ) {
                        pEngine->setBPM( pSong->__bpm - 1*mult );
                }


                AudioEngine::get_instance()->unlock();

                return true;
        }


        if( sActionString == "BPM_INCR" ){
                AudioEngine::get_instance()->lock( "Action::BPM_INCR" );

                int mult = 1;   

                bool ok;
                mult = pAction->getParameter1().toInt(&ok,10);


                Song* pSong = pEngine->getSong();
                if (pSong->__bpm  < 300) {
                        pEngine->setBPM( pSong->__bpm + 1*mult );
                }
                AudioEngine::get_instance()->unlock();

                return true;
        }



        if( sActionString == "BPM_DECR" ){
                AudioEngine::get_instance()->lock( "Action::BPM_DECR" );

                int mult = 1;   

                bool ok;
                mult = pAction->getParameter1().toInt(&ok,10);

                Song* pSong = pEngine->getSong();
                if (pSong->__bpm  > 40 ) {
                        pEngine->setBPM( pSong->__bpm - 1*mult );
                }
                AudioEngine::get_instance()->unlock();
                
                return true;
        }

        if( sActionString == ">>_NEXT_BAR"){
                pEngine->setPatternPos(pEngine->getPatternPos() +1 );
                return true;
        }

        if( sActionString == "<<_PREVIOUS_BAR"){
                pEngine->setPatternPos(pEngine->getPatternPos() -1 );
                return true;
        }
        
        return false;
}