view plugin/DSSIPluginFactory.cpp @ 1196:c7b9c902642f spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release.
There is a new protocol for this. Formerly the threshold parameter had a
range from -50dB to 0 with the default at -50, and -50 treated internally
as "no threshold". However, there was a hardcoded, hidden internal threshold
for spectrogram colour mapping at -80dB with anything below this being rounded
to zero. Now the threshold parameter has range -81 to -1 with the default
at -80, -81 is treated internally as "no threshold", and there is no hidden
internal threshold. So the default behaviour is the same as before, an
effective -80dB threshold, but it is now possible to change this in both
directions. Sessions reloaded from prior versions may look slightly different
because, if the session says there should be no threshold, there will now
actually be no threshold instead of having the hidden internal one.

Still need to do something in the UI to make it apparent that the -81dB
setting removes the threshold entirely. This is at least no worse than the
previous, also obscured, magic -50dB setting.

/* -*- 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
        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;
    }
}