From 6e5dd8c32a95e28dbad9a104f10e62fb69c20f05 Mon Sep 17 00:00:00 2001
From: edgeeffect <edgeeffect>
Date: Sat, 15 Feb 2003 10:30:04 +0000
Subject: [PATCH] mixer - now has between 2 and 16 inputs not just 4

---
 SpiralSound/Plugins/MixerPlugin/MixerPlugin.C | 136 +++++++++++-------
 SpiralSound/Plugins/MixerPlugin/MixerPlugin.h |  61 ++++----
 .../Plugins/MixerPlugin/MixerPluginGUI.C      | 136 ++++++++++++------
 .../Plugins/MixerPlugin/MixerPluginGUI.h      |  43 +++---
 4 files changed, 226 insertions(+), 150 deletions(-)

diff --git a/SpiralSound/Plugins/MixerPlugin/MixerPlugin.C b/SpiralSound/Plugins/MixerPlugin/MixerPlugin.C
index 5ca8dd9..d158e08 100644
--- a/SpiralSound/Plugins/MixerPlugin/MixerPlugin.C
+++ b/SpiralSound/Plugins/MixerPlugin/MixerPlugin.C
@@ -14,7 +14,9 @@
  *  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 <stdio.h>
 #include "MixerPlugin.h"
 #include "MixerPluginGUI.h"
 #include <FL/Fl_Button.h>
@@ -44,26 +46,17 @@ string GetGroupName()
 
 ///////////////////////////////////////////////////////
 
-MixerPlugin::MixerPlugin()
+MixerPlugin::MixerPlugin() :
+m_NumChannels(0)
 {
-	m_PluginInfo.Name="Mixer";
-	m_PluginInfo.Width=100;
-	m_PluginInfo.Height=125;
-	m_PluginInfo.NumInputs=4;
-	m_PluginInfo.NumOutputs=1;
-	m_PluginInfo.PortTips.push_back("Input one");	
-	m_PluginInfo.PortTips.push_back("Input two");	
-	m_PluginInfo.PortTips.push_back("Input three");	
-	m_PluginInfo.PortTips.push_back("Input four");	
-	m_PluginInfo.PortTips.push_back("Output");
-	
-	for (int n=0; n<NUM_CHANNELS; n++)
-	{
-		m_ChannelVal[n]=1.0f;		
-	}
-	
-	m_AudioCH->Register("Value",&m_GUIArgs.Value);
-	m_AudioCH->Register("Num",&m_GUIArgs.Num);
+        m_Version = 2;
+        m_PluginInfo.Name="Mixer";
+	m_PluginInfo.Width=80;
+	m_PluginInfo.Height=145;
+        CreatePorts ();
+	for (int n=0; n<MAX_CHANNELS; n++) m_ChannelVal[n]=1.0f;
+	m_AudioCH->Register("Value", &m_GUIArgs.Value);
+	m_AudioCH->Register("Num", &m_GUIArgs.Num);
 }
 
 MixerPlugin::~MixerPlugin()
@@ -71,7 +64,7 @@ MixerPlugin::~MixerPlugin()
 }
 
 PluginInfo &MixerPlugin::Initialise(const HostInfo *Host)
-{	
+{
 	return SpiralPlugin::Initialise(Host);
 }
 
@@ -82,44 +75,77 @@ SpiralGUIType *MixerPlugin::CreateGUI()
 										this,m_AudioCH,m_HostInfo);
 }
 
-void MixerPlugin::Execute()
-{
-	// Mix the inputs
-	for (int n=0; n<m_HostInfo->BUFSIZE; n++)
-	{
-		SetOutput(0,n,(GetInput(0,n)*m_ChannelVal[0])+
-					  (GetInput(1,n)*m_ChannelVal[1])+
-					  (GetInput(2,n)*m_ChannelVal[2])+
-					  (GetInput(3,n)*m_ChannelVal[3]));
-	}
+void MixerPlugin::Execute () {
+     // Mix the inputs
+     for (int n=0; n<m_HostInfo->BUFSIZE; n++) {
+         float out = 0.0;
+         for (int c=0; c<m_NumChannels; c++) out += (GetInput (c, n) * m_ChannelVal[c]);
+         SetOutput (0, n, out);
+     }
 }
 
-void MixerPlugin::ExecuteCommands()
-{
-	if (m_AudioCH->IsCommandWaiting())
-	{
-		switch (m_AudioCH->GetCommand())
-		{
-			case (SETCH) : SetChannel(m_GUIArgs.Num,m_GUIArgs.Value); break;
-		}
-	}
+void MixerPlugin::ExecuteCommands() {
+     if (m_AudioCH->IsCommandWaiting()) {
+        switch (m_AudioCH->GetCommand()) {
+          case SETCH:
+               SetChannel (m_GUIArgs.Num, m_GUIArgs.Value);
+               break;
+          case SETNUM:
+               SetChannels (m_GUIArgs.Num);
+               break;
+        }
+      }
 }
 
-void MixerPlugin::StreamOut(ostream &s)
-{
-	s<<m_Version<<" ";
-	for (int n=0; n<NUM_CHANNELS; n++)
-	{
-		s<<m_ChannelVal[n]<<" ";
-	}
+void MixerPlugin::SetChannels (int n) {
+     // once to clear the connections with the current info
+     // do we need this????
+     UpdatePluginInfoWithHost();
+     // Things can get a bit confused deleting and adding inputs
+     // so we just chuck away all the ports...
+     RemoveAllInputs ();
+     RemoveAllOutputs ();
+     m_PluginInfo.NumInputs = 0;
+     m_PluginInfo.NumOutputs = 0;
+     m_PluginInfo.PortTips.clear ();
+     // ... and then create some new ones
+     CreatePorts (n, true);
+     // do the actual update
+     UpdatePluginInfoWithHost ();
+}
+
+void MixerPlugin::CreatePorts (int n, bool AddPorts) {
+     int c;
+     m_PluginInfo.NumInputs = n;
+     m_NumChannels = n;
+     char t[256];
+     for (c=1; c<=n; c++) {
+         sprintf (t, "Input %d", c);
+         m_PluginInfo.PortTips.push_back (t);
+     }
+     m_PluginInfo.NumOutputs = 1;
+     m_PluginInfo.PortTips.push_back ("Output");
+     if (AddPorts) {
+        for (c=0; c<m_PluginInfo.NumInputs; c++) AddInput();
+        for (c=0; c<m_PluginInfo.NumOutputs; c++) AddOutput();
+     }
+}
+
+void MixerPlugin::StreamOut (ostream &s) {
+     s << m_Version << " ";
+     s << m_NumChannels << " ";
+     for (int n=0; n<m_NumChannels; n++) s << m_ChannelVal[n] << " ";
 }
 
-void MixerPlugin::StreamIn(istream &s)
-{	
-	int version;
-	s>>version;
-	for (int n=0; n<NUM_CHANNELS; n++)
-	{
-		s>>m_ChannelVal[n];
-	}
+void MixerPlugin::StreamIn (istream &s) {
+     int version, chans;
+     s >> version;
+     switch (version) {
+       case 1: SetChannels (4);
+               break;
+       case 2: s >> chans;
+               SetChannels (chans);
+               break;
+     }
+     for (int n=0; n<m_NumChannels; n++) s >> m_ChannelVal[n];
 }
diff --git a/SpiralSound/Plugins/MixerPlugin/MixerPlugin.h b/SpiralSound/Plugins/MixerPlugin/MixerPlugin.h
index b60e972..78bb605 100644
--- a/SpiralSound/Plugins/MixerPlugin/MixerPlugin.h
+++ b/SpiralSound/Plugins/MixerPlugin/MixerPlugin.h
@@ -14,7 +14,7 @@
  *  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 "../SpiralPlugin.h"
 #include <FL/Fl_Pixmap.H>
@@ -22,39 +22,34 @@
 #ifndef MixerPLUGIN
 #define MixerPLUGIN
 
-static const int NUM_CHANNELS = 4;
+static const int MAX_CHANNELS = 16;
 
-class MixerPlugin : public SpiralPlugin
-{
-public:
- 	MixerPlugin();
-	virtual ~MixerPlugin();
-	
-	virtual PluginInfo &Initialise(const HostInfo *Host);
-	virtual SpiralGUIType *CreateGUI();
-	virtual void Execute();
-	virtual void ExecuteCommands();
-	virtual void StreamOut(ostream &s);
-	virtual void StreamIn(istream &s);
-	
-	// has to be defined in the plugin	
-	virtual void UpdateGUI() { Fl::check(); }
-	
-	enum GUICommands{NONE,SETCH};
-	struct GUIArgs
-	{
-		int Num;
-		float Value;
-	};
-	
-	float GetChannel(int n) { return m_ChannelVal[n]; }
-			
-private:
-
-	GUIArgs m_GUIArgs;
-
-	void  SetChannel(int n, float s) { m_ChannelVal[n]=s; }	
-	float m_ChannelVal[NUM_CHANNELS];
+class MixerPlugin : public SpiralPlugin {
+  public:
+      MixerPlugin();
+      virtual ~MixerPlugin();
+      virtual PluginInfo &Initialise(const HostInfo *Host);
+      virtual SpiralGUIType *CreateGUI();
+      virtual void Execute();
+      virtual void ExecuteCommands();
+      virtual void StreamOut(ostream &s);
+      virtual void StreamIn(istream &s);
+      // has to be defined in the plugin
+      virtual void UpdateGUI() { Fl::check(); }
+      enum GUICommands { NONE, SETCH, SETNUM };
+      struct GUIArgs {
+	     int Num;
+	     float Value;
+      };
+      float GetChannel (int n) { return m_ChannelVal[n]; }
+      int GetChannels (void) { return m_NumChannels; }
+  private:
+      void CreatePorts (int n = 4, bool AddPorts = false);
+      GUIArgs m_GUIArgs;
+      int m_NumChannels;
+      void SetChannel (int n, float s) { m_ChannelVal[n]=s; }
+      void SetChannels (int n);
+      float m_ChannelVal[MAX_CHANNELS];
 };
 
 #endif
diff --git a/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.C b/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.C
index bf12943..b2d6f3c 100644
--- a/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.C
+++ b/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.C
@@ -14,7 +14,7 @@
  *  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 "MixerPluginGUI.h"
 #include <FL/fl_draw.h>
@@ -28,51 +28,105 @@ static const int GUIBG2_COLOUR = 145;
 
 MixerPluginGUI::MixerPluginGUI(int w, int h,MixerPlugin *o,ChannelHandler *ch,const HostInfo *Info) :
 SpiralPluginGUI(w,h,o,ch)
-{	
-	int Width=20;
-	int Height=100;
-	
-	for (int n=0; n<NUM_CHANNELS; n++)
-	{
-		Numbers[n]=n;
-		
-		m_Chan[n] = new Fl_Slider(10+(2+Width)*n, 22, Width, Height, "");
-		m_Chan[n]->type(4);
-		m_Chan[n]->selection_color(GUI_COLOUR);
-    	m_Chan[n]->labelsize(10);
-		m_Chan[n]->maximum(2);
-    	m_Chan[n]->step(0.01);
-    	m_Chan[n]->value(1.0);
-    	m_Chan[n]->callback((Fl_Callback*)cb_Chan,(void*)&Numbers[n]);
-		add(m_Chan[n]);		
-	}
-	
-	end();
+{
+        for (int n=0; n<MAX_CHANNELS; n++) Numbers[n]=n;
+	m_MainPack = new Fl_Pack(0, 20, w, 100);
+	m_MainPack->type (FL_HORIZONTAL);
+        add (m_MainPack);
+
+        // start with four...
+	AddChan(); AddChan(); AddChan(); AddChan();
+
+        m_Buttons = new Fl_Pack (0, 122, 45, 20);
+        m_Buttons->type (FL_HORIZONTAL);
+        add (m_Buttons);
+        m_Delete = new Fl_Button (2, 0, 20, 20, "-");
+	m_Delete->callback ((Fl_Callback*)cb_Delete);
+	m_Buttons->add (m_Delete);
+        m_Add = new Fl_Button (24, 0, 20, 20, "+");
+	m_Add->callback ((Fl_Callback*)cb_Add);
+	m_Buttons->add (m_Add);
 }
 
-void MixerPluginGUI::UpdateValues(SpiralPlugin *o)
-{
-	MixerPlugin *Plugin = (MixerPlugin *)o;
-	
-	for (int n=0; n<NUM_CHANNELS; n++)
-	{
-		m_Chan[n]->value(2.0f-Plugin->GetChannel(n));
-	}
+void MixerPluginGUI::AddChan (bool SendData = false, bool ResizeIt = false) {
+     Fl_Slider *NewSlide = new Fl_Slider (0, 0, 20, 100, "");
+     NewSlide->type (4);
+     NewSlide->selection_color (GUI_COLOUR);
+     NewSlide->labelsize (10);
+     NewSlide->maximum (2);
+     NewSlide->step (0.01);
+     NewSlide->value (1.0);
+     int num = (int)m_SlidVec.size();
+     NewSlide->callback ((Fl_Callback*)cb_Chan, (void*)&Numbers[num]);
+     m_MainPack->add (NewSlide);
+     m_SlidVec.push_back (NewSlide);
+     if (ResizeIt) resize (x(), y(), w()+20, h());
+     if (SendData) {
+        if (ResizeIt) redraw ();
+        m_GUICH->Set ("Num", ++num);
+        m_GUICH->SetCommand (MixerPlugin::SETNUM);
+        m_GUICH->Wait ();
+        m_GUICH->Set ("Num", num);
+        m_GUICH->Set ("Value", (float)(2.0f - NewSlide->value ()));
+        m_GUICH->SetCommand(MixerPlugin::SETCH);
+     }
+}
+
+void MixerPluginGUI::DeleteChan (bool SendData = true, bool DrawIt = true) {
+     vector<Fl_Slider*>::iterator i = m_SlidVec.end ();
+     i--;
+     m_MainPack->remove (*i);
+     delete *i;
+     m_SlidVec.erase (i);
+     if (SendData) {
+        m_GUICH->Set ("Num", (int)m_SlidVec.size());
+        m_GUICH->SetCommand (MixerPlugin::SETNUM);
+     }
+     resize (x(), y(), w()-20, h());
+     if (DrawIt) redraw();
+}
+
+void MixerPluginGUI::UpdateValues(SpiralPlugin *o) {
+     MixerPlugin *Plugin = (MixerPlugin *)o;
+     unsigned int chans = Plugin->GetChannels();
+     while (chans < m_SlidVec.size()) DeleteChan (false, false);
+     while (chans > m_SlidVec.size()) AddChan (false, true);
+     for (unsigned int n=0; n<chans; n++)
+         m_SlidVec[n]->value (2.0f - Plugin->GetChannel (n));
+     redraw();
+}
+
+inline void MixerPluginGUI::cb_Add_i(Fl_Button* o, void* v) {
+       if ((int)m_SlidVec.size() < MAX_CHANNELS) AddChan (true, true);
 }
-	
-inline void MixerPluginGUI::cb_Chan_i(Fl_Slider* o, void* v) 
-{ 
-	m_GUICH->Set("Num",(*(int*)(v)));
-	m_GUICH->Set("Value",(float)(2.0f-o->value()));
-	m_GUICH->SetCommand(MixerPlugin::SETCH);
+
+void MixerPluginGUI::cb_Add(Fl_Button* o, void* v) {
+     ((MixerPluginGUI*)(o->parent()->parent()))->cb_Add_i(o,v);
 }
 
-void MixerPluginGUI::cb_Chan(Fl_Slider* o, void* v) 
-{ ((MixerPluginGUI*)(o->parent()))->cb_Chan_i(o,v);}
+inline void MixerPluginGUI::cb_Delete_i(Fl_Button* o, void* v) {
+       if (m_SlidVec.size() > 2) DeleteChan ();
+}
+
+void MixerPluginGUI::cb_Delete(Fl_Button* o, void* v) {
+     ((MixerPluginGUI*)(o->parent()->parent()))->cb_Delete_i(o,v);
+}
+
+inline void MixerPluginGUI::cb_Chan_i(Fl_Slider* o, void* v) {
+       m_GUICH->Set("Num", (*(int*)(v)));
+       m_GUICH->Set("Value", (float)(2.0f-o->value()));
+       m_GUICH->SetCommand (MixerPlugin::SETCH);
+}
+
+void MixerPluginGUI::cb_Chan(Fl_Slider* o, void* v) {
+     ((MixerPluginGUI*)(o->parent()->parent()))->cb_Chan_i(o,v);
+}
 
 const string MixerPluginGUI::GetHelpText(const string &loc){
-    return string("")
-    + "A general purpose 4 channel mixer, not much else to say\n"
-    + "really. Useful for mixing CV values as well as mono audio\n"
-    + "signals.    \n";
+      return string("")
+      + "A general purpose mixer, not much else to say really.\n"
+      + "Useful for mixing CV values as well as mono audio\n"
+      + "signals.\n"
+      + "Add up to 16 channels using the '+' button.\n"
+      + "Use the '-' button to remove unwanted channels.\n";
 }
diff --git a/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.h b/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.h
index cbbbd27..dde5127 100644
--- a/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.h
+++ b/SpiralSound/Plugins/MixerPlugin/MixerPluginGUI.h
@@ -14,11 +14,12 @@
  *  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 <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Group.H>
+#include <FL/Fl_Pack.H>
 #include <FL/Fl_Slider.H>
 
 #include "MixerPlugin.h"
@@ -27,27 +28,27 @@
 #ifndef MixerGUI
 #define MixerGUI
 
+static int Numbers[MAX_CHANNELS];
 
-class MixerPluginGUI : public SpiralPluginGUI
-{
-public:
-	MixerPluginGUI(int w, int h, MixerPlugin *o,ChannelHandler *ch,const HostInfo *Info);
-	
-	virtual void UpdateValues(SpiralPlugin *o);
-
-protected:
-    const string GetHelpText(const string &loc);	
-	
-private:
-	
-	int Numbers[NUM_CHANNELS];
-	
-	Fl_Slider* m_Chan[NUM_CHANNELS];
-	
-	//// Callbacks ////
-	inline void cb_Chan_i(Fl_Slider* o, void* v);
-	static void cb_Chan(Fl_Slider* o, void* v); 
-	
+class MixerPluginGUI : public SpiralPluginGUI {
+   public:
+      MixerPluginGUI(int w, int h, MixerPlugin *o,ChannelHandler *ch,const HostInfo *Info);
+      virtual void UpdateValues(SpiralPlugin *o);
+   protected:
+      const string GetHelpText(const string &loc);
+   private:
+      void AddChan (bool SendData = false, bool ResizeIt = false);
+      void DeleteChan (bool SendData = true, bool DrawIt = true);
+      vector<Fl_Slider*> m_SlidVec;
+      Fl_Pack *m_MainPack, *m_Buttons;
+      Fl_Button *m_Add, *m_Delete;
+      //// Callbacks ////
+      inline void cb_Chan_i (Fl_Slider* o, void* v);
+      static void cb_Chan (Fl_Slider* o, void* v);
+      inline void cb_Add_i (Fl_Button* o, void* v);
+      static void cb_Add (Fl_Button* o, void* v);
+      inline void cb_Delete_i (Fl_Button* o, void* v);
+      static void cb_Delete (Fl_Button* o, void* v);
 };
 
 #endif