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#include <dlfcn.h>
#include <pbd/compose.h>
#include <pbd/error.h>
#include <pbd/pathscanner.h>
#include <ardour/control_protocol.h>
#include <ardour/control_protocol_manager.h>
using namespace ARDOUR;
using namespace PBD;
using namespace std;
#include "i18n.h"
ControlProtocolManager* ControlProtocolManager::_instance = 0;
ControlProtocolManager::ControlProtocolManager ()
{
if (_instance == 0) {
_instance = this;
}
}
ControlProtocolManager::~ControlProtocolManager()
{
LockMonitor lm (protocols_lock, __LINE__, __FILE__);
for (list<ControlProtocol*>::iterator i = control_protocols.begin(); i != control_protocols.end(); ++i) {
delete (*i);
}
control_protocols.clear ();
}
void
ControlProtocolManager::startup (Session& s)
{
list<ControlProtocolInfo *>::iterator i;
for (i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
ControlProtocolInfo* cpi = (*i);
if (cpi->name == "Tranzport") {
cpi->descriptor = get_descriptor ((*i)->path);
if (cpi->descriptor == 0) {
error << string_compose (_("control protocol name \"%1\" has no descriptor"), cpi->name) << endmsg;
continue;
}
if ((cpi->protocol = cpi->descriptor->initialize (cpi->descriptor, &s)) == 0) {
error << string_compose (_("control protocol name \"%1\" could not be initialized"), cpi->name) << endmsg;
continue;
}
{
LockMonitor lm (protocols_lock, __LINE__, __FILE__);
control_protocols.push_back (cpi->protocol);
}
cpi->protocol->init ();
cpi->protocol->set_active (true);
}
}
}
ControlProtocol*
ControlProtocolManager::instantiate (Session& session, string name)
{
list<ControlProtocolInfo *>::iterator i;
for (i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
if ((*i)->name == name) {
break;
}
}
if (i == control_protocol_info.end()) {
error << string_compose (_("control protocol name \"%1\" is unknown"), name) << endmsg;
return 0;
}
ControlProtocolInfo* cpi = (*i);
cpi->descriptor = get_descriptor ((*i)->path);
if (cpi->descriptor == 0) {
error << string_compose (_("control protocol name \"%1\" has no descriptor"), name) << endmsg;
return 0;
}
if ((cpi->protocol = cpi->descriptor->initialize (cpi->descriptor, &session)) == 0) {
error << string_compose (_("control protocol name \"%1\" could not be initialized"), name) << endmsg;
return 0;
}
LockMonitor lm (protocols_lock, __LINE__, __FILE__);
control_protocols.push_back (cpi->protocol);
return cpi->protocol;
}
int
ControlProtocolManager::teardown (string name)
{
for (list<ControlProtocolInfo*>::iterator i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
ControlProtocolInfo* cpi = *i;
if (cpi->name == name && cpi->descriptor && cpi->protocol) {
cpi->descriptor->destroy (cpi->descriptor, cpi->protocol);
{
LockMonitor lm (protocols_lock, __LINE__, __FILE__);
list<ControlProtocol*>::iterator p = find (control_protocols.begin(), control_protocols.end(), cpi->protocol);
if (p != control_protocols.end()) {
control_protocols.erase (p);
}
}
cpi->protocol = 0;
return 0;
}
}
return -1;
}
static bool protocol_filter (const string& str, void *arg)
{
/* Not a dotfile, has a prefix before a period, suffix is "so" */
return str[0] != '.' && (str.length() > 3 && str.find (".so") == (str.length() - 3));
}
void
ControlProtocolManager::discover_control_protocols (string path)
{
vector<string *> *found;
PathScanner scanner;
cerr << "CP Manager looking for surfaces\n";
found = scanner (path, protocol_filter, 0, false, true);
for (vector<string*>::iterator i = found->begin(); i != found->end(); ++i) {
cerr << "CP Manager looking at " << **i << endl;
control_protocol_discover (**i);
delete *i;
}
delete found;
}
int
ControlProtocolManager::control_protocol_discover (string path)
{
ControlProtocolDescriptor* descriptor;
if ((descriptor = get_descriptor (path)) != 0) {
ControlProtocolInfo* info = new ControlProtocolInfo ();
info->descriptor = descriptor;
info->name = descriptor->name;
info->path = path;
control_protocol_info.push_back (info);
cerr << "Found \"" << info->name << "\"\n";
dlclose (descriptor->module);
} else {
cerr << "no descriptor\n";
}
return 0;
}
ControlProtocolDescriptor*
ControlProtocolManager::get_descriptor (string path)
{
void *module;
ControlProtocolDescriptor *descriptor = 0;
ControlProtocolDescriptor* (*dfunc)(void);
const char *errstr;
if ((module = dlopen (path.c_str(), RTLD_NOW)) == 0) {
error << string_compose(_("ControlProtocolManager: cannot load module \"%1\" (%2)"), path, dlerror()) << endmsg;
return 0;
}
dfunc = (ControlProtocolDescriptor* (*)(void)) dlsym (module, "protocol_descriptor");
if ((errstr = dlerror()) != 0) {
error << string_compose(_("ControlProtocolManager: module \"%1\" has no descriptor function."), path) << endmsg;
error << errstr << endmsg;
dlclose (module);
return 0;
}
descriptor = dfunc();
if (descriptor) {
descriptor->module = module;
} else {
dlclose (module);
}
return descriptor;
}
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