view plugin/DSSIPluginFactory.cpp @ 1376:d9511f9e04d7 dev/refactor-piper-related

Introduce some POD structs for describing an external server application and the desired libraries to load from it, and disambiguating between empty list request and invalid list request. This allows for overriding PiperVampPluginFactory behaviour for using a PluginScan to populate the list request.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2006 Chris Cannam.
*/

#include "DSSIPluginFactory.h"
#include <iostream>

#include <QString>

#include "DSSIPluginInstance.h"
#include "PluginIdentifier.h"

#include <cstdlib>

#include "base/Profiler.h"

//!!!
#include "plugin/plugins/SamplePlayer.h"

#include "system/System.h"

#ifdef HAVE_LRDF
#include "lrdf.h"
#endif // HAVE_LRDF


DSSIPluginFactory::DSSIPluginFactory() :
    LADSPAPluginFactory()
{
    m_hostDescriptor.DSSI_API_Version = 2;
    m_hostDescriptor.request_transport_information = NULL;
    m_hostDescriptor.request_midi_send = DSSIPluginInstance::requestMidiSend;
    m_hostDescriptor.request_non_rt_thread = DSSIPluginInstance::requestNonRTThread;
    m_hostDescriptor.midi_send = DSSIPluginInstance::midiSend;
}

DSSIPluginFactory::~DSSIPluginFactory()
{
    // nothing else to do here either
}

void
DSSIPluginFactory::enumeratePlugins(std::vector<QString> &list)
{
    Profiler profiler("DSSIPluginFactory::enumeratePlugins");

    for (std::vector<QString>::iterator i = m_identifiers.begin();
	 i != m_identifiers.end(); ++i) {

	const DSSI_Descriptor *ddesc = getDSSIDescriptor(*i);
	if (!ddesc) continue;

	const LADSPA_Descriptor *descriptor = ddesc->LADSPA_Plugin;
	if (!descriptor) continue;
	
//	SVDEBUG << "DSSIPluginFactory::enumeratePlugins: Name " << (descriptor->Name ? descriptor->Name : "NONE" ) << endl;

	list.push_back(*i);
	list.push_back(descriptor->Name);
	list.push_back(QString("%1").arg(descriptor->UniqueID));
	list.push_back(descriptor->Label);
	list.push_back(descriptor->Maker);
	list.push_back(descriptor->Copyright);
	list.push_back((ddesc->run_synth || ddesc->run_multiple_synths) ? "true" : "false");
	list.push_back(ddesc->run_multiple_synths ? "true" : "false");
	list.push_back(m_taxonomy[*i]);
	list.push_back(QString("%1").arg(descriptor->PortCount));

	for (int p = 0; p < (int)descriptor->PortCount; ++p) {

	    int type = 0;
	    if (LADSPA_IS_PORT_CONTROL(descriptor->PortDescriptors[p])) {
		type |= PortType::Control;
	    } else {
		type |= PortType::Audio;
	    }
	    if (LADSPA_IS_PORT_INPUT(descriptor->PortDescriptors[p])) {
		type |= PortType::Input;
	    } else {
		type |= PortType::Output;
	    }

	    list.push_back(QString("%1").arg(p));
	    list.push_back(descriptor->PortNames[p]);
	    list.push_back(QString("%1").arg(type));
	    list.push_back(QString("%1").arg(getPortDisplayHint(descriptor, p)));
	    list.push_back(QString("%1").arg(getPortMinimum(descriptor, p)));
	    list.push_back(QString("%1").arg(getPortMaximum(descriptor, p)));
	    list.push_back(QString("%1").arg(getPortDefault(descriptor, p)));
	}
    }

    unloadUnusedLibraries();
}
	
RealTimePluginInstance *
DSSIPluginFactory::instantiatePlugin(QString identifier,
				     int instrument,
				     int position,
				     sv_samplerate_t sampleRate,
				     int blockSize,
				     int channels)
{
    Profiler profiler("DSSIPluginFactory::instantiatePlugin");

    const DSSI_Descriptor *descriptor = getDSSIDescriptor(identifier);

    if (descriptor) {

	DSSIPluginInstance *instance =
	    new DSSIPluginInstance
	    (this, instrument, identifier, position, sampleRate, blockSize, channels,
	     descriptor);

	m_instances.insert(instance);

	return instance;
    }

    return 0;
}

const DSSI_Descriptor *
DSSIPluginFactory::getDSSIDescriptor(QString identifier)
{
    QString type, soname, label;
    PluginIdentifier::parseIdentifier(identifier, type, soname, label);

    if (soname == PluginIdentifier::BUILTIN_PLUGIN_SONAME) {
	if (label == "sample_player") {
	    const DSSI_Descriptor *descriptor = SamplePlayer::getDescriptor(0);
	    if (descriptor) {
		descriptor->receive_host_descriptor(&m_hostDescriptor);
	    }
	    return descriptor;
	} else {
	    return 0;
	}
    }
    
    bool firstInLibrary = false;

    if (m_libraryHandles.find(soname) == m_libraryHandles.end()) {
	loadLibrary(soname);
	if (m_libraryHandles.find(soname) == m_libraryHandles.end()) {
	    cerr << "WARNING: DSSIPluginFactory::getDSSIDescriptor: loadLibrary failed for " << soname << endl;
	    return 0;
	}
	firstInLibrary = true;
    }

    void *libraryHandle = m_libraryHandles[soname];

    DSSI_Descriptor_Function fn = (DSSI_Descriptor_Function)
	DLSYM(libraryHandle, "dssi_descriptor");

    if (!fn) {
	cerr << "WARNING: DSSIPluginFactory::getDSSIDescriptor: No descriptor function in library " << soname << endl;
	return 0;
    }

    const DSSI_Descriptor *descriptor = 0;
    
    int index = 0;
    while ((descriptor = fn(index))) {
	if (descriptor->LADSPA_Plugin->Label == label) {
	    if (firstInLibrary && (descriptor->DSSI_API_Version >= 2)) {
		descriptor->receive_host_descriptor(&m_hostDescriptor);
	    }
	    return descriptor;
	}
	++index;
    }

    cerr << "WARNING: DSSIPluginFactory::getDSSIDescriptor: No such plugin as " << label << " in library " << soname << endl;

    return 0;
}

const LADSPA_Descriptor *
DSSIPluginFactory::getLADSPADescriptor(QString identifier)
{
    const DSSI_Descriptor *dssiDescriptor = getDSSIDescriptor(identifier);
    if (dssiDescriptor) return dssiDescriptor->LADSPA_Plugin;
    else return 0;
}


std::vector<QString>
DSSIPluginFactory::getPluginPath()
{
    std::vector<QString> pathList;
    std::string path;

    char *cpath = getenv("DSSI_PATH");
    if (cpath) path = cpath;

    if (path == "") {

        path = DEFAULT_DSSI_PATH;

	char *home = getenv("HOME");
	if (home) {
            std::string::size_type f;
            while ((f = path.find("$HOME")) != std::string::npos &&
                   f < path.length()) {
                path.replace(f, 5, home);
            }
        }

#ifdef _WIN32
        const char *pfiles = getenv("ProgramFiles");
        if (!pfiles) pfiles = "C:\\Program Files";
        {
        std::string::size_type f;
        while ((f = path.find("%ProgramFiles%")) != std::string::npos &&
               f < path.length()) {
            path.replace(f, 14, pfiles);
        }
        }
#endif
    }

    std::string::size_type index = 0, newindex = 0;

    while ((newindex = path.find(PATH_SEPARATOR, index)) < path.size()) {
	pathList.push_back(path.substr(index, newindex - index).c_str());
	index = newindex + 1;
    }
    
    pathList.push_back(path.substr(index).c_str());

    return pathList;
}


std::vector<QString>
DSSIPluginFactory::getLRDFPath(QString &baseUri)
{
    std::vector<QString> lrdfPaths;

#ifdef HAVE_LRDF
    std::vector<QString> pathList = getPluginPath();

    lrdfPaths.push_back("/usr/local/share/dssi/rdf");
    lrdfPaths.push_back("/usr/share/dssi/rdf");

    lrdfPaths.push_back("/usr/local/share/ladspa/rdf");
    lrdfPaths.push_back("/usr/share/ladspa/rdf");

    for (std::vector<QString>::iterator i = pathList.begin();
	 i != pathList.end(); ++i) {
	lrdfPaths.push_back(*i + "/rdf");
    }

#ifdef DSSI_BASE
    baseUri = DSSI_BASE;
#else
    baseUri = "http://dssi.sourceforge.net/ontology#";
#endif
#else
    // avoid unused parameter
    baseUri = "";
#endif

    return lrdfPaths;
}    


void
DSSIPluginFactory::discoverPluginsFrom(QString soname)
{
    Profiler profiler("DSSIPluginFactory::discoverPlugins");

    // Note that soname is expected to be a full path at this point,
    // of a file that is known to exist

    void *libraryHandle = DLOPEN(soname, RTLD_LAZY);

    if (!libraryHandle) {
        cerr << "WARNING: DSSIPluginFactory::discoverPlugins: couldn't load plugin library "
                  << soname << " - " << DLERROR() << endl;
        return;
    }

    DSSI_Descriptor_Function fn = (DSSI_Descriptor_Function)
	DLSYM(libraryHandle, "dssi_descriptor");

    if (!fn) {
	cerr << "WARNING: DSSIPluginFactory::discoverPlugins: No descriptor function in " << soname << endl;
	return;
    }

    const DSSI_Descriptor *descriptor = 0;
    
    int index = 0;
    while ((descriptor = fn(index))) {

	const LADSPA_Descriptor *ladspaDescriptor = descriptor->LADSPA_Plugin;
	if (!ladspaDescriptor) {
	    cerr << "WARNING: DSSIPluginFactory::discoverPlugins: No LADSPA descriptor for plugin " << index << " in " << soname << endl;
	    ++index;
	    continue;
	}

        RealTimePluginDescriptor *rtd = new RealTimePluginDescriptor;
        rtd->name = ladspaDescriptor->Name;
        rtd->label = ladspaDescriptor->Label;
        rtd->maker = ladspaDescriptor->Maker;
        rtd->copyright = ladspaDescriptor->Copyright;
        rtd->category = "";
        rtd->isSynth = (descriptor->run_synth ||
                        descriptor->run_multiple_synths);
        rtd->parameterCount = 0;
        rtd->audioInputPortCount = 0;
        rtd->audioOutputPortCount = 0;
        rtd->controlOutputPortCount = 0;

	QString identifier = PluginIdentifier::createIdentifier
	    ("dssi", soname, ladspaDescriptor->Label);

#ifdef HAVE_LRDF
	char *def_uri = 0;
	lrdf_defaults *defs = 0;
		
	QString category = m_taxonomy[identifier];

        if (category == "" && m_lrdfTaxonomy[ladspaDescriptor->UniqueID] != "") {
            m_taxonomy[identifier] = m_lrdfTaxonomy[ladspaDescriptor->UniqueID];
            category = m_taxonomy[identifier];
        }

	if (category == "") {
	    std::string name = rtd->name;
	    if (name.length() > 4 &&
		name.substr(name.length() - 4) == " VST") {
		if (descriptor->run_synth || descriptor->run_multiple_synths) {
		    category = "VST instruments";
		} else {
		    category = "VST effects";
		}
		m_taxonomy[identifier] = category;
	    }
	}

        rtd->category = category.toStdString();
	
//	cerr << "Plugin id is " << ladspaDescriptor->UniqueID
//                  << ", identifier is \"" << identifier
//		  << "\", category is \"" << category
//		  << "\", name is " << ladspaDescriptor->Name
//		  << ", label is " << ladspaDescriptor->Label
//		  << endl;
	
	def_uri = lrdf_get_default_uri(ladspaDescriptor->UniqueID);
	if (def_uri) {
	    defs = lrdf_get_setting_values(def_uri);
	}
	
	unsigned int controlPortNumber = 1;
	
	for (int i = 0; i < (int)ladspaDescriptor->PortCount; i++) {
	    
	    if (LADSPA_IS_PORT_CONTROL(ladspaDescriptor->PortDescriptors[i])) {
		
		if (def_uri && defs) {
		    
		    for (int j = 0; j < (int)defs->count; j++) {
			if (defs->items[j].pid == controlPortNumber) {
//			    cerr << "Default for this port (" << defs->items[j].pid << ", " << defs->items[j].label << ") is " << defs->items[j].value << "; applying this to port number " << i << " with name " << ladspaDescriptor->PortNames[i] << endl;
			    m_portDefaults[ladspaDescriptor->UniqueID][i] =
				defs->items[j].value;
			}
		    }
		}
		
		++controlPortNumber;
	    }
	}
#endif // HAVE_LRDF

	for (unsigned long i = 0; i < ladspaDescriptor->PortCount; i++) {
	    if (LADSPA_IS_PORT_CONTROL(ladspaDescriptor->PortDescriptors[i])) {
                if (LADSPA_IS_PORT_INPUT(ladspaDescriptor->PortDescriptors[i])) {
                    ++rtd->parameterCount;
                } else {
                    if (strcmp(ladspaDescriptor->PortNames[i], "latency") &&
                        strcmp(ladspaDescriptor->PortNames[i], "_latency")) {
                        ++rtd->controlOutputPortCount;
                        rtd->controlOutputPortNames.push_back
                            (ladspaDescriptor->PortNames[i]);
                    }
                }
            } else {
                if (LADSPA_IS_PORT_INPUT(ladspaDescriptor->PortDescriptors[i])) {
                    ++rtd->audioInputPortCount;
                } else if (LADSPA_IS_PORT_OUTPUT(ladspaDescriptor->PortDescriptors[i])) {
                    ++rtd->audioOutputPortCount;
                }
            }
        }

	m_identifiers.push_back(identifier);

        m_rtDescriptors[identifier] = rtd;

	++index;
    }

    if (DLCLOSE(libraryHandle) != 0) {
        cerr << "WARNING: DSSIPluginFactory::discoverPlugins - can't unload " << libraryHandle << endl;
        return;
    }
}