spiralsynthmodular/SpiralSound/Plugins/LADSPAPlugin/LADSPAPlugin.C

/*  SpiralSound
 *  Copyleft (C) 2001 David Griffiths <dave@pawfal.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 "LADSPAPlugin.h"
#include "LADSPAPluginGUI.h"
#include <stdio.h>
#include "SpiralIcon.xpm"
#include "utils.h"
 
extern "C" {
SpiralPlugin* CreateInstance()
{
	return new LADSPAPlugin;
}

char** GetIcon()
{
	return SpiralIcon_xpm;
}

int GetID()
{
	return 0x0016;
}
}

///////////////////////////////////////////////////////

LADSPAPlugin::LADSPAPlugin() : 
PlugHandle(0), 
PlugDesc(NULL),
m_Gain(1.0f),
m_Amped(false)
{
	m_Version=3;
	
	m_PluginInfo.Name="LADSPA";
	m_PluginInfo.Width=600;
	m_PluginInfo.Height=300;
	m_PluginInfo.NumInputs=0;
	m_PluginInfo.NumOutputs=1;
	m_PluginInfo.PortTips.push_back("Nuffink yet");	
}

LADSPAPlugin::~LADSPAPlugin()
{
}

PluginInfo &LADSPAPlugin::Initialise(const HostInfo *Host)
{
	PluginInfo& Info = SpiralPlugin::Initialise(Host);
	LADSPA_Data *NewPort = new LADSPA_Data[m_HostInfo->BUFSIZE];
	m_LADSPABufVec.push_back(NewPort);
	return Info; 
}

SpiralGUIType *LADSPAPlugin::CreateGUI()
{
	m_GUI = new LADSPAPluginGUI(m_PluginInfo.Width,
								  	    m_PluginInfo.Height,
										this,m_HostInfo);
	m_GUI->hide();
	return m_GUI;
}

void LADSPAPlugin::Execute()
{
	if (PlugDesc)
	{
		// convert inputs if exist (zero if not)
		for (int n=0; n<m_PluginInfo.NumInputs; n++)
		{
			if (GetInput(n))
			{
				if (m_PortClamp[n]) {
					// scale input to match hinted range
					float Offset=m_PortMin[n];
					float Scale=m_PortMax[n]-m_PortMin[n];

					//cerr<<n<<" ["<<Scale<<"] ["<<Offset<<"]"<<endl;

					for (int i=0; i<m_HostInfo->BUFSIZE; i++)
					{
						m_LADSPABufVec[n][i]=Offset+(GetInput(n,i)*0.5f+0.5f)*Scale;
						//cerr<<Scale<<" "<<Offset<<" "<<m_LADSPABufVec[n][i]<<endl;
					}
				} else {
					// pass input as is
					for (int i=0; i<m_HostInfo->BUFSIZE; i++)
					{
						m_LADSPABufVec[n][i]=GetInput(n,i);
					}
				}
				// Update the GUI outputs with the first value in the buffer
				((LADSPAPluginGUI*)m_GUI)->UpdatePortDisplay(n,m_LADSPABufVec[n][0]);
			}
			else // zero
			{
				for (int i=0; i<m_HostInfo->BUFSIZE; i++) m_LADSPABufVec[n][i]=0;
			}
		}
		
		// run plugin
   		PlugDesc->run(PlugInstHandle,m_HostInfo->BUFSIZE);
		
		// convert outputs
		for (int n=0; n<m_PluginInfo.NumOutputs; n++)
		{
			/*if (m_Amped)
			{
				for (int i=0; i<m_HostInfo->BUFSIZE; i++) 
				{
					SetOutput(n,i,m_LADSPABufVec[n+m_PluginInfo.NumInputs][i]*m_Gain*10);
				}
			}
			else*/
			{
				for (int i=0; i<m_HostInfo->BUFSIZE; i++) 
				{
					SetOutput(n,i,m_LADSPABufVec[n+m_PluginInfo.NumInputs][i]*m_Gain);
				}
			}
		}
	}
}

void LADSPAPlugin::StreamOut(ostream &s)
{
	s<<m_Version<<" ";
	
	switch (m_Version)
	{
		case 3:
		{
			s<<m_Gain<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetFilename()<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetLabel()<<" ";
			s<<m_PortMin.size()<<" ";
			assert(m_PortMin.size()==m_PortMax.size());
			assert(m_PortMin.size()==m_PortClamp.size());
			for (vector<float>::iterator i=m_PortMin.begin();
				 i!=m_PortMin.end(); i++)
			{
				s<<*i<<" ";
			}
			for (vector<float>::iterator i=m_PortMax.begin();
				 i!=m_PortMax.end(); i++)
			{
				s<<*i<<" ";
			}
			for (vector<bool>::iterator i=m_PortClamp.begin();
				 i!=m_PortClamp.end(); i++)
			{
				s<<*i<<" ";
			}
		}
		break;
		case 2:
// Here for consistency - should never actually happen, as
// version is always 3!
		{
			s<<m_Gain<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetFilename()<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetLabel()<<" ";
			s<<m_PortMin.size()<<" ";
			assert(m_PortMin.size()==m_PortMax.size());
			for (vector<float>::iterator i=m_PortMin.begin();
				 i!=m_PortMin.end(); i++)
			{
				s<<*i<<" ";
			}
			for (vector<float>::iterator i=m_PortMax.begin();
				 i!=m_PortMax.end(); i++)
			{
				s<<*i<<" ";
			}
		}
		break;

		case 1:
		{
			s<<m_Gain<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetFilename()<<" ";
			s<<((LADSPAPluginGUI*)m_GUI)->GetLabel()<<" ";
		}
		break;
	}
}

void LADSPAPlugin::StreamIn(istream &s)
{
	int version;
	s>>version;

	switch (version)
	{
		case 3:
		{
			s>>m_Gain;

			string Filename,Label;
			s>>Filename>>Label;
			int PortCount;
			s>>PortCount;
			float min,max;
			bool clamp;

			for (int n=0; n<PortCount; n++)
			{
				s>>min;
				m_PortMin.push_back(min);
			}

			for (int n=0; n<PortCount; n++)
			{
				s>>max;
				m_PortMax.push_back(max);
			}
			for (int n=0; n<PortCount; n++)
			{
				s>>clamp;
				m_PortClamp.push_back(clamp);
			}

			if (Filename!="None")
			{
				UpdatePlugin(Filename.c_str(), Label.c_str(), false);
			}

			for (int n=0; n<PortCount; n++)
			{
				((LADSPAPluginGUI*)m_GUI)->SetMinMax(n,m_PortMin[n],m_PortMax[n],m_PortClamp[n]);
			}
		}
		break;

		case 2:
		{
			s>>m_Gain;

			string Filename,Label;
			s>>Filename>>Label;
			int PortCount;
			s>>PortCount;
			float min,max;
			for (int n=0; n<PortCount; n++)
			{
				s>>min;
				m_PortMin.push_back(min);
			}

			for (int n=0; n<PortCount; n++)
			{
				s>>max;
				m_PortMax.push_back(max);
			}

			for (int n=0; n<PortCount; n++)
			{
			// Set PortClamp to true as default
				m_PortClamp.push_back(true);
			}

			if (Filename!="None")
			{
				UpdatePlugin(Filename.c_str(), Label.c_str(), false);
			}

			for (int n=0; n<PortCount; n++)
			{
				((LADSPAPluginGUI*)m_GUI)->SetMinMax(n,m_PortMin[n],m_PortMax[n],m_PortClamp[n]);
			}
		}
		break;

		case 1:
		{
			s>>m_Gain;
	
			string Filename,Label;
			s>>Filename>>Label;
			
			if (Filename!="None")
			{
				UpdatePlugin(Filename.c_str(), Label.c_str());
			}
		}
		break;
	}
}

bool LADSPAPlugin::UpdatePlugin(const char * filename, const char * label, bool PortClampReset)
{
	// first call with same info, to clear the ports
	UpdatePluginInfoWithHost();
	
	if (PlugHandle) {
		if (PlugDesc->deactivate) PlugDesc->deactivate(PlugInstHandle);
		PlugDesc->cleanup(PlugInstHandle);
		unloadLADSPAPluginLibrary(PlugHandle);
		PlugHandle = 0;
	}
	
	if ((PlugHandle = loadLADSPAPluginLibrary(filename))) {
		if (!(PlugDesc = findLADSPAPluginDescriptor(PlugHandle, filename, label))) {
			unloadLADSPAPluginLibrary(PlugHandle);
			PlugHandle = 0;
		} else {
			/* Now we can instantiate the LADSPA Plugin and wire it to the datas bytes */
			if (!(PlugInstHandle = PlugDesc->instantiate(PlugDesc, m_HostInfo->SAMPLERATE))) {
				cerr << "LADSPA Plugin error to instantiate...\n";
				unloadLADSPAPluginLibrary(PlugHandle);
				PlugDesc = 0;
				PlugHandle = 0;
				return 0;
			}
			
			m_PluginInfo.NumInputs=getPortCountByType(PlugDesc, LADSPA_PORT_INPUT);
			m_PluginInfo.NumOutputs=getPortCountByType(PlugDesc, LADSPA_PORT_OUTPUT);
			
/////////////////////////////////
// LADSPA Buffers

			for(vector<LADSPA_Data*>::iterator i=m_LADSPABufVec.begin();
				i!=m_LADSPABufVec.end(); i++)
			{
				if (*i) delete[] (*i);
			}
			m_LADSPABufVec.clear();						
			
			unsigned long c=0;			
			for (unsigned int n=0; n<PlugDesc->PortCount; n++)
			{
				if (LADSPA_IS_PORT_INPUT(PlugDesc->PortDescriptors[n]))
				{
					LADSPA_Data *NewPort = new LADSPA_Data[m_HostInfo->BUFSIZE];
					m_LADSPABufVec.push_back(NewPort);
					PlugDesc->connect_port(PlugInstHandle, n, m_LADSPABufVec[c]);
					m_PortID.push_back(n);															
					c++;
				}					
			}			
					
			for (unsigned int n=0; n<PlugDesc->PortCount; n++)
			{
				if (LADSPA_IS_PORT_OUTPUT(PlugDesc->PortDescriptors[n]))
				{
					LADSPA_Data *NewPort = new LADSPA_Data[m_HostInfo->BUFSIZE];
					m_LADSPABufVec.push_back(NewPort);
					PlugDesc->connect_port(PlugInstHandle, n, m_LADSPABufVec[c]);
					m_PortID.push_back(n);
					c++;
				}					
			}		
			
			// activate the plugin now
			if (PlugDesc->activate)
				PlugDesc->activate(PlugInstHandle);

/////////////////////////////////
// SSM Buffers

			// Clear i/o buffers
			RemoveAllInputs();
			RemoveAllOutputs();

			// Reallocate the i/o buffers required
			for (int n=0; n<m_PluginInfo.NumInputs; n++) AddInput();			
			for (int n=0; n<m_PluginInfo.NumOutputs; n++) AddOutput();
			
//////////////////////////////
// Update the GUI stuff

			((LADSPAPluginGUI*)m_GUI)->SetName(PlugDesc->Name);
			((LADSPAPluginGUI*)m_GUI)->SetMaker(PlugDesc->Maker);
			
			m_PluginInfo.PortTips.clear();
			((LADSPAPluginGUI*)m_GUI)->ClearPortInfo();
			
			string desc;
			c=0;
			for (unsigned int i = 0; i < PlugDesc->PortCount; i++) 
			{
				if (LADSPA_IS_PORT_INPUT(PlugDesc->PortDescriptors[i])) 
				{
					desc = string(PlugDesc->PortNames[i]) +
					       (LADSPA_IS_PORT_CONTROL(PlugDesc->PortDescriptors[i]) ? " (CV)" : " (AU)");
					m_PluginInfo.PortTips.push_back(desc.c_str());
					((LADSPAPluginGUI*)m_GUI)->AddPortInfo(m_PluginInfo.PortTips[c].c_str());					
					c++;
				}
			}
			
			for (unsigned int i = 0; i < PlugDesc->PortCount; i++) 
			{	
				if (LADSPA_IS_PORT_OUTPUT(PlugDesc->PortDescriptors[i])) {

					desc = string(PlugDesc->PortNames[i]) +
					       (LADSPA_IS_PORT_CONTROL(PlugDesc->PortDescriptors[i]) ? " (CV)" : " (AU)");
						   
					m_PluginInfo.PortTips.push_back(desc.c_str());
				}
			}
			
			((LADSPAPluginGUI*)m_GUI)->SetFilename(filename);
			((LADSPAPluginGUI*)m_GUI)->SetLabel(label);
			
			UpdatePluginInfoWithHost();

			if (PortClampReset)
			{
				m_PortMin.clear();
				m_PortMax.clear();			
				m_PortClamp.clear();

				for (int n=0; n<m_PluginInfo.NumInputs; n++)
				{
					float Max=1.0f, Min=-1.0f;
					int Port=m_PortID[n];
						
					// Get the bounding hints for the port
					LADSPA_PortRangeHintDescriptor HintDesc=PlugDesc->PortRangeHints[Port].HintDescriptor;
					if (LADSPA_IS_HINT_BOUNDED_BELOW(HintDesc))					
					{
						Min=PlugDesc->PortRangeHints[Port].LowerBound;
						if (LADSPA_IS_HINT_SAMPLE_RATE(HintDesc))
						{
							Min*=m_HostInfo->SAMPLERATE;
						}
					}
					if (LADSPA_IS_HINT_BOUNDED_ABOVE(HintDesc))					
					{
							Max=PlugDesc->PortRangeHints[Port].UpperBound;
						if (LADSPA_IS_HINT_SAMPLE_RATE(HintDesc))
						{
							Max*=m_HostInfo->SAMPLERATE;
						}
					}
								
					m_PortMin.push_back(Min);
					m_PortMax.push_back(Max);
// PortClamp defaults to true
					m_PortClamp.push_back(true);
								
					((LADSPAPluginGUI*)m_GUI)->SetMinMax(n, Min, Max, true);
				}
			}								
			return true;
		}
	}
	
	cerr << "Error loading LADSPA Plugin.\n";
	
	return false;
}