Ability to save mixer sends to disk with the mmp

LMMS can load projects with the old mixer and new projects with
the new mixer. By "new mixer", I simply mean not hardcoded to 64
channels.

src/core/FxMixer.cpp

@@ -442,13 +442,16 @@ void FxMixer::masterMix( sampleFrame * _buf )
 
 void FxMixer::clear()
 {
-	for( int i = 0; i < m_fxChannels.size(); ++i )
+	while( m_fxChannels.size() > 1 )
 	{
-		clearChannel(i);
+		deleteChannel(1);
 	}
+
+	clearChannel(0);
 }
 
 
+
 void FxMixer::clearChannel(fx_ch_t index)
 {
 	FxChannel * ch = m_fxChannels[index];
@@ -483,38 +486,94 @@ void FxMixer::saveSettings( QDomDocument & _doc, QDomElement & _this )
 {
 	for( int i = 0; i < m_fxChannels.size(); ++i )
 	{
+		FxChannel * ch = m_fxChannels[i];
+
 		QDomElement fxch = _doc.createElement( QString( "fxchannel" ) );
 		_this.appendChild( fxch );
-		m_fxChannels[i]->m_fxChain.saveState( _doc, fxch );
-		m_fxChannels[i]->m_volumeModel.saveSettings( _doc, fxch,
-								"volume" );
-		m_fxChannels[i]->m_muteModel.saveSettings( _doc, fxch,
-								"muted" );
+
+		ch->m_fxChain.saveState( _doc, fxch );
+		ch->m_volumeModel.saveSettings( _doc, fxch, "volume" );
+		ch->m_muteModel.saveSettings( _doc, fxch, "muted" );
 		fxch.setAttribute( "num", i );
-		fxch.setAttribute( "name", m_fxChannels[i]->m_name );
+		fxch.setAttribute( "name", ch->m_name );
+
+		// add the channel sends
+		for( int si = 0; si < ch->m_sends.size(); ++si )
+		{
+			QDomElement sendsDom = _doc.createElement( QString( "send" ) );
+			fxch.appendChild( sendsDom );
+
+			sendsDom.setAttribute( "channel", ch->m_sends[si] );
+			ch->m_sendAmount[si]->saveSettings( _doc, sendsDom, "amount");
+		}
 	}
 }
 
 
+void FxMixer::allocateChannelsTo(int num)
+{
+	while( num > m_fxChannels.size() - 1 )
+	{
+		createChannel();
+
+		// delete the default send to master
+		deleteChannelSend(m_fxChannels.size()-1, 0);
+	}
+}
 
 
 void FxMixer::loadSettings( const QDomElement & _this )
 {
 	clear();
 	QDomNode node = _this.firstChild();
-	for( int i = 0; i <= 64; ++i ) // TODO make this work
+	bool thereIsASend = false;
+
+	while( ! node.isNull() )
 	{
 		QDomElement fxch = node.toElement();
+
+		// index of the channel we are about to load
 		int num = fxch.attribute( "num" ).toInt();
-		m_fxChannels[num]->m_fxChain.restoreState(
-			fxch.firstChildElement(
-				m_fxChannels[num]->m_fxChain.nodeName() ) );
+
+		// allocate enough channels
+		allocateChannelsTo( num );
+
 		m_fxChannels[num]->m_volumeModel.loadSettings( fxch, "volume" );
 		m_fxChannels[num]->m_muteModel.loadSettings( fxch, "muted" );
 		m_fxChannels[num]->m_name = fxch.attribute( "name" );
+
+		m_fxChannels[num]->m_fxChain.restoreState( fxch.firstChildElement(
+			m_fxChannels[num]->m_fxChain.nodeName() ) );
+
+		// mixer sends
+		QDomNodeList chData = fxch.childNodes();
+		for( unsigned int i=0; i<chData.length(); ++i )
+		{
+			QDomElement chDataItem = chData.at(i).toElement();
+			if( chDataItem.nodeName() == QString( "send" ) )
+			{
+				thereIsASend = true;
+				int sendTo = chDataItem.attribute( "channel" ).toInt();
+				allocateChannelsTo( sendTo) ;
+				float amount = chDataItem.attribute( "amount" ).toFloat();
+				createChannelSend( num, sendTo, amount );
+			}
+		}
+
+
+
 		node = node.nextSibling();
 	}
 
+	// check for old format. 65 fx channels and no explicit sends.
+	if( ! thereIsASend && m_fxChannels.size() == 65 ) {
+		// create a send from every channel into master
+		for( int i=1; i<m_fxChannels.size(); ++i )
+		{
+			createChannelSend(i, 0);
+		}
+	}
+
 	emit dataChanged();
 }
 

src/core/song.cpp

@@ -904,6 +904,23 @@ void song::loadProject( const QString & _file_name )
 						firstChildElement( "track" ) );
 	}
 	QDomNode node = mmp.content().firstChild();
+
+	// walk through and fix up the mixer
+	while( !node.isNull() )
+	{
+		if( node.nodeName() == engine::fxMixer()->nodeName() )
+		{
+			engine::fxMixer()->restoreState( node.toElement() );
+
+			// refresh FxMixerView
+			engine::fxMixerView()->refreshDisplay();
+		}
+
+		node = node.nextSibling();
+	}
+
+	node = mmp.content().firstChild();
+
 	while( !node.isNull() )
 	{
 		if( node.isElement() )
@@ -917,10 +934,6 @@ void song::loadProject( const QString & _file_name )
 			{
 				restoreControllerStates( node.toElement() );
 			}
-			else if( node.nodeName() == engine::fxMixer()->nodeName() )
-			{
-				engine::fxMixer()->restoreState( node.toElement() );
-			}
 			else if( engine::hasGUI() )
 			{
 				if( node.nodeName() ==
@@ -973,7 +986,6 @@ void song::loadProject( const QString & _file_name )
 	// resolve all IDs so that autoModels are automated
 	automationPattern::resolveAllIDs();
 
-
 	engine::getMixer()->unlock();
 
 	configManager::inst()->addRecentlyOpenedProject( _file_name );

src/gui/FxLine.cpp

@@ -9,7 +9,6 @@
 #include "FxMixerView.h"
 #include "embed.h"
 #include "engine.h"
-#include "lcd_spinbox.h"
 #include "SendButtonIndicator.h"
 
 FxLine::FxLine( QWidget * _parent, FxMixerView * _mv, int _channelIndex) :
@@ -32,11 +31,27 @@ FxLine::FxLine( QWidget * _parent, FxMixerView * _mv, int _channelIndex) :
 	m_sendBtn->move(4,4);
 
 	// channel number
-	lcdSpinBox * l = new lcdSpinBox( 2, this );
-	l->model()->setRange( m_channelIndex, m_channelIndex );
-	l->model()->setValue( m_channelIndex );
-	l->move( 2, 58 );
-	l->setMarginWidth( 1 );
+	m_lcd = new lcdSpinBox( 2, this );
+	m_lcd->model()->setRange( m_channelIndex, m_channelIndex );
+	m_lcd->model()->setValue( m_channelIndex );
+	m_lcd->move( 2, 58 );
+	m_lcd->setMarginWidth( 1 );
+}
+
+FxLine::~FxLine()
+{
+	delete m_sendKnob;
+	delete m_sendBtn;
+	delete m_lcd;
+}
+
+
+void FxLine::setChannelIndex(int index) {
+	m_channelIndex = index;
+
+	m_lcd->model()->setRange( m_channelIndex, m_channelIndex );
+	m_lcd->model()->setValue( m_channelIndex );
+	m_lcd->update();
 }
 
 

src/gui/FxMixerView.cpp

@@ -91,8 +91,8 @@ FxMixerView::FxMixerView() :
 		m_fxChannelViews[i] = new FxChannelView(m_channelAreaWidget, this, i);
 		chLayout->addWidget(m_fxChannelViews[i]->m_fxLine);
 	}
-	// add the scrolling section to the main layout
 
+	// add the scrolling section to the main layout
 	// class solely for scroll area to pass key presses down
 	class ChannelArea : public QScrollArea
 	{
@@ -175,6 +175,32 @@ void FxMixerView::addNewChannel()
 }
 
 
+void FxMixerView::refreshDisplay()
+{
+	// delete all views and re-add them
+	for( int i = 1; i<m_fxChannelViews.size(); ++i )
+	{
+		chLayout->removeWidget(m_fxChannelViews[i]->m_fxLine);
+		delete m_fxChannelViews[i]->m_fader;
+		delete m_fxChannelViews[i]->m_muteBtn;
+		delete m_fxChannelViews[i]->m_fxLine;
+		delete m_fxChannelViews[i];
+	}
+	m_channelAreaWidget->adjustSize();
+
+	// re-add the views
+	m_fxChannelViews.resize(engine::fxMixer()->numChannels());
+	for( int i = 1; i < m_fxChannelViews.size(); ++i )
+	{
+		m_fxChannelViews[i] = new FxChannelView(m_channelAreaWidget, this, i);
+		chLayout->addWidget(m_fxChannelViews[i]->m_fxLine);
+	}
+
+	// fix master
+//TODO
+}
+
+
 void FxMixerView::updateMaxChannelSelector()
 {
 	// update the and max. channel number for every instrument
@@ -190,8 +216,8 @@ void FxMixerView::updateMaxChannelSelector()
 			if( trackList[i]->type() == track::InstrumentTrack )
 			{
 				InstrumentTrack * inst = (InstrumentTrack *) trackList[i];
-				inst->effectChannelModel()->setMaxValue(
-						m_fxChannelViews.size()-1);
+				inst->effectChannelModel()->setRange(0,
+					m_fxChannelViews.size()-1,1);
 			}
 		}
 	}