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non/mixer/src/LADSPAInfo.C

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//
// LADSPAInfo.C - Class for indexing information on LADSPA Plugins
//
// Copyleft (C) 2002 Mike Rawes <myk@waxfrenzy.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 <config.h>
#include <vector>
#include <string>
#include <list>
#include <map>
#include <iostream>
#include <sstream>
#include <algorithm>
#include <stdio.h>
#include <cstring>
#include <cstdlib>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <dlfcn.h>
#include <ladspa.h>
#define HAVE_LIBLRDF 1
#ifdef HAVE_LIBLRDF
#include <lrdf.h>
#endif
#include "LADSPAInfo.h"
using namespace std;
LADSPAInfo::LADSPAInfo(bool override,
const char *path_list)
{
if (strlen(path_list) > 0) {
m_ExtraPaths = strdup(path_list);
} else {
m_ExtraPaths = NULL;
}
m_LADSPAPathOverride = override;
RescanPlugins();
}
LADSPAInfo::~LADSPAInfo()
{
CleanUp();
}
void
LADSPAInfo::RescanPlugins(void)
{
// Clear out what we've got
CleanUp();
if (!m_LADSPAPathOverride) {
// Get $LADPSA_PATH, if available
char *ladspa_path = getenv("LADSPA_PATH");
if (ladspa_path) {
ScanPathList(ladspa_path, &LADSPAInfo::ExaminePluginLibrary);
} else {
cerr << "WARNING: LADSPA_PATH environment variable not set" << endl;
cerr << " Assuming /usr/lib/ladspa:/usr/local/lib/ladspa" << endl;
ScanPathList("/usr/lib/ladspa:/usr/local/lib/ladspa", &LADSPAInfo::ExaminePluginLibrary);
}
}
// Check any supplied extra paths
if (m_ExtraPaths) {
ScanPathList(m_ExtraPaths, &LADSPAInfo::ExaminePluginLibrary);
}
// Do we have any plugins now?
if (m_Plugins.size() == 0) {
cerr << "WARNING: No plugins found" << endl;
} else {
cerr << m_Plugins.size() << " plugins found in " << m_Libraries.size() << " libraries" << endl;
#ifdef HAVE_LIBLRDF
// Got some plugins. Now search for RDF data
lrdf_init();
char *rdf_path = getenv("LADSPA_RDF_PATH");
if (rdf_path) {
// Examine rdf info
ScanPathList(rdf_path, &LADSPAInfo::ExamineRDFFile);
} else {
cerr << "WARNING: LADSPA_RDF_PATH environment variable not set" << endl;
cerr << " Assuming /usr/share/ladspa/rdf:/usr/local/share/ladspa/rdf" << endl;
// Examine rdf info
ScanPathList("/usr/share/ladspa/rdf:/usr/local/share/ladspa/rdf", &LADSPAInfo::ExamineRDFFile);
}
MetadataRDFDescend(LADSPA_BASE "Plugin", 0);
// See which plugins were not added to an rdf group, and add them
// all into the top level 'LADSPA' one
list<unsigned long> rdf_p;
// Get indices of plugins added to groups
for (vector<RDFURIInfo>::iterator ri = m_RDFURIs.begin(); ri != m_RDFURIs.end(); ri++) {
rdf_p.insert(rdf_p.begin(), ri->Plugins.begin(), ri->Plugins.end());
}
// Add all uncategorized plugins to top level group, subclassed by their
// library's basename.
rdf_p.unique();
rdf_p.sort();
unsigned long last_p = 0;
for (list<unsigned long>::iterator p = rdf_p.begin(); p != rdf_p.end(); p++) {
if ((*p - last_p) > 1) {
for (unsigned long i = last_p + 1; i < *p; i++) {
// URI 0 is top-level "LADSPA" group
m_RDFURIs[0].Plugins.push_back(i);
}
}
last_p = *p;
}
while (++last_p < m_Plugins.size()) {
// URI 0 is top-level "LADSPA" group
m_RDFURIs[0].Plugins.push_back(last_p);
}
lrdf_cleanup();
#else
// No RDF. Add all plugins to top-level group
RDFURIInfo ri;
ri.URI = "";
ri.Label = "LADSPA";
m_RDFURIs.push_back(ri);
m_RDFLabelLookup["LADSPA"] = 0;
for (unsigned long i = 0; i < m_Plugins.size(); i++) {
// Add plugin index
m_RDFURIs[0].Plugins.push_back(i);
}
#endif
}
}
void
LADSPAInfo::UnloadAllLibraries(void)
{
// Blank descriptors
for (vector<PluginInfo>::iterator i = m_Plugins.begin();
i != m_Plugins.end(); i++) {
if (i->Descriptor) i->Descriptor = NULL;
}
// Unload DLLs,
for (vector<LibraryInfo>::iterator i = m_Libraries.begin();
i != m_Libraries.end(); i++) {
if (i->Handle) {
dlclose(i->Handle);
i->Handle = NULL;
}
i->RefCount = 0;
}
}
const LADSPA_Descriptor *
LADSPAInfo::GetDescriptorByID(unsigned long unique_id)
{
if (m_IDLookup.find(unique_id) == m_IDLookup.end()) {
cerr << "LADSPA Plugin ID " << unique_id << " not found!" << endl;
return NULL;
}
// Got plugin index
unsigned long plugin_index = m_IDLookup[unique_id];
PluginInfo *pi = &(m_Plugins[plugin_index]);
LibraryInfo *li = &(m_Libraries[pi->LibraryIndex]);
if (!(pi->Descriptor)) {
LADSPA_Descriptor_Function desc_func = GetDescriptorFunctionForLibrary(pi->LibraryIndex);
if (desc_func) pi->Descriptor = desc_func(pi->Index);
}
if (pi->Descriptor) {
// Success, so increment ref counter for library
li->RefCount++;
}
return pi->Descriptor;
}
void
LADSPAInfo::DiscardDescriptorByID(unsigned long unique_id)
{
if (m_IDLookup.find(unique_id) == m_IDLookup.end()) {
cerr << "LADSPA Plugin ID " << unique_id << " not found!" << endl;
} else {
// Get plugin index
unsigned long plugin_index = m_IDLookup[unique_id];
PluginInfo *pi = &(m_Plugins[plugin_index]);
LibraryInfo *li = &(m_Libraries[pi->LibraryIndex]);
pi->Descriptor = NULL;
// Decrement reference counter for library, and unload if last
if (li->RefCount > 0) {
li->RefCount--;
if (li->RefCount == 0) {
// Unload library
dlclose(li->Handle);
li->Handle = NULL;
}
}
}
}
// ****************************************************************************
// ** SSM Specific Functions **
// ****************************************************************************
unsigned long
LADSPAInfo::GetIDFromFilenameAndLabel(std::string filename,
std::string label)
{
bool library_loaded = false;
if (m_FilenameLookup.find(filename) == m_FilenameLookup.end()) {
cerr << "LADSPA Library " << filename << " not found!" << endl;
return 0;
}
unsigned long library_index = m_FilenameLookup[filename];
if (!(m_Libraries[library_index].Handle)) library_loaded = true;
LADSPA_Descriptor_Function desc_func = GetDescriptorFunctionForLibrary(library_index);
if (!desc_func) {
return 0;
}
// Search for label in library
const LADSPA_Descriptor *desc;
for (unsigned long i = 0; (desc = desc_func(i)) != NULL; i++) {
string l = desc->Label;
if (l == label) {
// If we had to load the library, unload it
unsigned long id = desc->UniqueID;
if (library_loaded) {
dlclose(m_Libraries[library_index].Handle);
m_Libraries[library_index].Handle = NULL;
}
return id;
}
}
cerr << "Plugin " << label << " not found in library " << filename << endl;
return 0;
}
const vector<LADSPAInfo::PluginEntry>
LADSPAInfo::GetMenuList(void)
{
m_SSMMenuList.clear();
DescendGroup("", "LADSPA", 1);
return m_SSMMenuList;
}
unsigned long
LADSPAInfo::GetPluginListEntryByID(unsigned long unique_id)
{
unsigned long j = 0;
for (vector<PluginEntry>::iterator i = m_SSMMenuList.begin();
i != m_SSMMenuList.end(); i++, j++) {
if (i->UniqueID == unique_id) return j;
}
return m_SSMMenuList.size();
}
// ****************************************************************************
// ** Private Member Functions **
// ****************************************************************************
// Build a list of plugins by group, suitable for SSM LADSPA Plugin drop-down
// The top-level "LADSPA" group is not included
void
LADSPAInfo::DescendGroup(string prefix,
const string group,
unsigned int depth)
{
list<string> groups = GetSubGroups(group);
if (prefix.length() > 0) {
// Add an explicit '/' as we're creating sub-menus from groups
prefix += "/";
}
for (list<string>::iterator g = groups.begin(); g != groups.end(); g++) {
string name;
// Escape '/' and '|' characters
unsigned int x = g->find_first_of("/|");
if (x == string::npos) {
name = *g;
} else {
unsigned int last_x = 0;
while (x < string::npos) {
name += g->substr(last_x, x - last_x) + '\\' + (*g)[x];
last_x = x + 1;
x = g->find_first_of("/|", x + 1);
}
name += g->substr(last_x, x - last_x);
}
DescendGroup(prefix + name, *g, depth + 1);
}
if (m_RDFLabelLookup.find(group) != m_RDFLabelLookup.end()) {
unsigned long uri_index = m_RDFLabelLookup[group];
// Create group for unclassified plugins
if (prefix.length() == 0) {
prefix = "Unclassified/";
depth = depth + 1;
}
// Temporary list (for sorting the plugins by name)
list<PluginEntry> plugins;
for (vector<unsigned long>::iterator p = m_RDFURIs[uri_index].Plugins.begin();
p != m_RDFURIs[uri_index].Plugins.end(); p++) {
PluginInfo *pi = &(m_Plugins[*p]);
string name;
// Escape '/' and '|' characters
unsigned int x = pi->Name.find_first_of("/|");
if (x == string::npos) {
name = pi->Name;
} else {
unsigned int last_x = 0;
while (x < string::npos) {
name += pi->Name.substr(last_x, x - last_x) + '\\' + pi->Name[x];
last_x = x + 1;
x = pi->Name.find_first_of("/|", x + 1);
}
name += pi->Name.substr(last_x, x - last_x);
}
PluginEntry pe;
pe.Depth = depth;
pe.UniqueID = pi->UniqueID;
pe.Name = prefix + name;
plugins.push_back(pe);
}
plugins.sort();
// Deal with duplicates by numbering them
for (list<PluginEntry>::iterator i = plugins.begin();
i != plugins.end(); ) {
string name = i->Name;
i++;
unsigned long n = 2;
while ((i != plugins.end()) && (i->Name == name)) {
stringstream s;
s << n;
i->Name = name + " (" + s.str() + ")";
n++;
i++;
}
}
// Add all ordered entries to the Menu List
// This ensures that plugins appear after groups
for (list<PluginEntry>::iterator p = plugins.begin(); p != plugins.end(); p++) {
m_SSMMenuList.push_back(*p);
}
}
}
// Get list of groups that are within given group. The root group is
// always "LADSPA"
list<string>
LADSPAInfo::GetSubGroups(const string group)
{
list<string> groups;
unsigned long uri_index;
if (m_RDFLabelLookup.find(group) == m_RDFLabelLookup.end()) {
return groups;
} else {
uri_index = m_RDFLabelLookup[group];
}
for (vector<unsigned long>::iterator sg = m_RDFURIs[uri_index].Children.begin();
sg != m_RDFURIs[uri_index].Children.end(); sg++) {
groups.push_back(m_RDFURIs[*sg].Label);
}
groups.sort();
return groups;
}
// Unload any loaded DLLs and clear vectors etc
void
LADSPAInfo::CleanUp(void)
{
m_MaxInputPortCount = 0;
m_IDLookup.clear();
m_Plugins.clear();
// Unload loaded dlls
for (vector<LibraryInfo>::iterator i = m_Libraries.begin();
i != m_Libraries.end(); i++) {
if (i->Handle) dlclose(i->Handle);
}
m_Libraries.clear();
m_Paths.clear();
m_RDFURILookup.clear();
m_RDFURIs.clear();
if (m_ExtraPaths) {
free(m_ExtraPaths);
m_ExtraPaths = NULL;
}
}
// Given a colon-separated list of paths, examine the contents of each
// path, examining any regular files using the given member function,
// which currently can be:
//
// ExaminePluginLibrary - add plugin library info from plugins
// ExamineRDFFile - add plugin information from .rdf/.rdfs files
void
LADSPAInfo::ScanPathList(const char *path_list,
void (LADSPAInfo::*ExamineFunc)(const string,
const string))
{
const char *start;
const char *end;
int extra;
char *path;
string basename;
DIR *dp;
struct dirent *ep;
struct stat sb;
// This does the same kind of thing as strtok, but strtok won't
// like the const
start = path_list;
while (*start != '\0') {
while (*start == ':') start++;
end = start;
while (*end != ':' && *end != '\0') end++;
if (end - start > 0) {
extra = (*(end - 1) == '/') ? 0 : 1;
path = (char *)malloc(end - start + 1 + extra);
if (path) {
strncpy(path, start, end - start);
if (extra == 1) path[end - start] = '/';
path[end - start + extra] = '\0';
dp = opendir(path);
if (!dp) {
cerr << "WARNING: Could not open path " << path << endl;
} else {
while ((ep = readdir(dp))) {
// Stat file to get type
basename = ep->d_name;
if (!stat((path + basename).c_str(), &sb)) {
// We only want regular files
if (S_ISREG(sb.st_mode)) (*this.*ExamineFunc)(path, basename);
}
}
closedir(dp);
}
free(path);
}
}
start = end;
}
}
// Check given file is a valid LADSPA Plugin library
//
// If so, add path, library and plugin info
// to the m_Paths, m_Libraries and m_Plugins vectors.
//
void
LADSPAInfo::ExaminePluginLibrary(const string path,
const string basename)
{
void *handle;
LADSPA_Descriptor_Function desc_func;
const LADSPA_Descriptor *desc;
string fullpath = path + basename;
// We're not executing any code, so be lazy about resolving symbols
handle = dlopen(fullpath.c_str(), RTLD_LAZY);
if (!handle) {
cerr << "WARNING: File " << fullpath
<< " could not be examined" << endl;
cerr << "dlerror() output:" << endl;
cerr << dlerror() << endl;
} else {
// It's a DLL, so now see if it's a LADSPA plugin library
desc_func = (LADSPA_Descriptor_Function)dlsym(handle,
"ladspa_descriptor");
if (!desc_func) {
// Is DLL, but not a LADSPA one
cerr << "WARNING: DLL " << fullpath
<< " has no ladspa_descriptor function" << endl;
cerr << "dlerror() output:" << endl;
cerr << dlerror() << endl;
} else {
// Got ladspa_descriptor, so we can now get plugin info
bool library_added = false;
unsigned long i = 0;
desc = desc_func(i);
while (desc) {
// First, check that it's not a dupe
if (m_IDLookup.find(desc->UniqueID) != m_IDLookup.end()) {
unsigned long plugin_index = m_IDLookup[desc->UniqueID];
unsigned long library_index = m_Plugins[plugin_index].LibraryIndex;
unsigned long path_index = m_Libraries[library_index].PathIndex;
cerr << "WARNING: Duplicated Plugin ID ("
<< desc->UniqueID << ") found:" << endl;
cerr << " Plugin " << m_Plugins[plugin_index].Index
<< " in library: " << m_Paths[path_index]
<< m_Libraries[library_index].Basename
<< " [First instance found]" << endl;
cerr << " Plugin " << i << " in library: " << fullpath
<< " [Duplicate not added]" << endl;
} else {
if (CheckPlugin(desc)) {
// Add path if not already added
unsigned long path_index;
vector<string>::iterator p = find(m_Paths.begin(), m_Paths.end(), path);
if (p == m_Paths.end()) {
path_index = m_Paths.size();
m_Paths.push_back(path);
} else {
path_index = p - m_Paths.begin();
}
// Add library info if not already added
if (!library_added) {
LibraryInfo li;
li.PathIndex = path_index;
li.Basename = basename;
li.RefCount = 0;
li.Handle = NULL;
m_Libraries.push_back(li);
library_added = true;
}
// Add plugin info
PluginInfo pi;
pi.LibraryIndex = m_Libraries.size() - 1;
pi.Index = i;
pi.UniqueID = desc->UniqueID;
pi.Label = desc->Label;
pi.Name = desc->Name;
pi.Descriptor = NULL;
m_Plugins.push_back(pi);
// Find number of input ports
unsigned long in_port_count = 0;
for (unsigned long p = 0; p < desc->PortCount; p++) {
if (LADSPA_IS_PORT_INPUT(desc->PortDescriptors[p])) {
in_port_count++;
}
}
if (in_port_count > m_MaxInputPortCount) {
m_MaxInputPortCount = in_port_count;
}
// Add to index
m_IDLookup[desc->UniqueID] = m_Plugins.size() - 1;
} else {
cerr << "WARNING: Plugin " << desc->UniqueID << " not added" << endl;
}
}
desc = desc_func(++i);
}
}
dlclose(handle);
}
}
#ifdef HAVE_LIBLRDF
// Examine given RDF plugin meta-data file
void
LADSPAInfo::ExamineRDFFile(const std::string path,
const std::string basename)
{
string fileuri = "file://" + path + basename;
if (lrdf_read_file(fileuri.c_str())) {
cerr << "WARNING: File " << path + basename << " could not be parsed [Ignored]" << endl;
}
}
// Recursively add rdf information for plugins that have been
// found from scanning LADSPA_PATH
void
LADSPAInfo::MetadataRDFDescend(const char * uri,
unsigned long parent)
{
unsigned long this_uri_index;
// Check URI not already added
if (m_RDFURILookup.find(uri) == m_RDFURILookup.end()) {
// Not found
RDFURIInfo ri;
ri.URI = uri;
if (ri.URI == LADSPA_BASE "Plugin") {
// Add top level group as "LADSPA"
// This will always happen, even if there are no .rdf files read by liblrdf
// or if there is no liblrdf support
ri.Label = "LADSPA";
} else {
char * label = lrdf_get_label(uri);
if (label) {
ri.Label = label;
} else {
ri.Label = "(No label)";
}
}
// Add any instances found
lrdf_uris * instances = lrdf_get_instances(uri);
if (instances) {
for (unsigned long j = 0; j < instances->count; j++) {
unsigned long uid = lrdf_get_uid(instances->items[j]);
if (m_IDLookup.find(uid) != m_IDLookup.end()) {
ri.Plugins.push_back(m_IDLookup[uid]);
}
}
}
lrdf_free_uris(instances);
m_RDFURIs.push_back(ri);
this_uri_index = m_RDFURIs.size() - 1;
m_RDFURILookup[ri.URI] = this_uri_index;
m_RDFLabelLookup[ri.Label] = this_uri_index;
} else {
// Already added
this_uri_index = m_RDFURILookup[uri];
}
// Only add parent - child info if this uri is NOT the first (root) uri
if (this_uri_index > 0) {
m_RDFURIs[this_uri_index].Parents.push_back(parent);
m_RDFURIs[parent].Children.push_back(this_uri_index);
}
lrdf_uris * uris = lrdf_get_subclasses(uri);
if (uris) {
for (unsigned long i = 0; i < uris->count; i++) {
MetadataRDFDescend(uris->items[i], this_uri_index);
}
}
lrdf_free_uris(uris);
}
#endif
bool
LADSPAInfo::CheckPlugin(const LADSPA_Descriptor *desc)
{
#define test(t, m) { \
if (!(t)) { \
cerr << m << endl; \
return false; \
} \
}
test(desc->instantiate, "WARNING: Plugin has no instatiate function");
test(desc->connect_port, "WARNING: Warning: Plugin has no connect_port funciton");
test(desc->run, "WARNING: Plugin has no run function");
test(!(desc->run_adding != 0 && desc->set_run_adding_gain == 0),
"WARNING: Plugin has run_adding but no set_run_adding_gain");
test(!(desc->run_adding == 0 && desc->set_run_adding_gain != 0),
"WARNING: Plugin has set_run_adding_gain but no run_adding");
test(desc->cleanup, "WARNING: Plugin has no cleanup function");
test(!LADSPA_IS_INPLACE_BROKEN(desc->Properties),
"WARNING: Plugin cannot use in place processing");
test(desc->PortCount, "WARNING: Plugin has no ports");
return true;
}
LADSPA_Descriptor_Function
LADSPAInfo::GetDescriptorFunctionForLibrary(unsigned long library_index)
{
LibraryInfo *li = &(m_Libraries[library_index]);
if (!(li->Handle)) {
// Need full path
string fullpath = m_Paths[li->PathIndex];
fullpath.append(li->Basename);
// Immediate symbol resolution, as plugin code is likely to be executed
li->Handle = dlopen(fullpath.c_str(), RTLD_NOW);
if (!(li->Handle)) {
// Plugin library changed since last path scan
cerr << "WARNING: Plugin library " << fullpath << " cannot be loaded" << endl;
cerr << "Rescan of plugins recommended" << endl;
cerr << "dlerror() output:" << endl;
cerr << dlerror() << endl;
return NULL;
}
}
// Got handle so now verify that it's a LADSPA plugin library
const LADSPA_Descriptor_Function desc_func = (LADSPA_Descriptor_Function)dlsym(li->Handle,
"ladspa_descriptor");
if (!desc_func) {
// Is DLL, but not a LADSPA one (changed since last path scan?)
cerr << "WARNING: DLL " << m_Paths[li->PathIndex] << li->Basename
<< " has no ladspa_descriptor function" << endl;
cerr << "Rescan of plugins recommended" << endl;
cerr << "dlerror() output:" << endl;
cerr << dlerror() << endl;
// Unload library
dlclose(li->Handle);
return NULL;
}
return desc_func;
}
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