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livetrax/libs/ardour/lxvst_plugin.cc
Robin Gareus e1095310a8 Rework VST initialization:
Set the AEffect* plugin pointer before calling effOpen.
effOpen may call back into the host (masterCallback) and invoke
actions which depend on _plugin (eg. to call back into the plugin again)
2017-03-07 00:13:56 +01:00

177 lines
4.7 KiB
C++

/*
Copyright (C) 2004 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/fileutils.h>
#include <glibmm/miscutils.h>
#include "ardour/filesystem_paths.h"
#include "ardour/linux_vst_support.h"
#include "ardour/session.h"
#include "ardour/lxvst_plugin.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
LXVSTPlugin::LXVSTPlugin (AudioEngine& e, Session& session, VSTHandle* h, int unique_id)
: VSTPlugin (e, session, h)
{
/* Instantiate the plugin and return a VSTState* */
Session::vst_current_loading_id = unique_id;
if ((_state = vstfx_instantiate (_handle, Session::vst_callback, this)) == 0) {
throw failed_constructor();
}
open_plugin ();
Session::vst_current_loading_id = 0;
init_plugin ();
}
LXVSTPlugin::LXVSTPlugin (const LXVSTPlugin &other)
: VSTPlugin (other)
{
_handle = other._handle;
Session::vst_current_loading_id = PBD::atoi(other.unique_id());
if ((_state = vstfx_instantiate (_handle, Session::vst_callback, this)) == 0) {
throw failed_constructor();
}
open_plugin ();
Session::vst_current_loading_id = 0;
XMLNode* root = new XMLNode (other.state_node_name ());
LocaleGuard lg;
other.add_state (root);
set_state (*root, Stateful::loading_state_version);
delete root;
init_plugin ();
}
LXVSTPlugin::~LXVSTPlugin ()
{
vstfx_close (_state);
}
PluginPtr
LXVSTPluginInfo::load (Session& session)
{
try {
PluginPtr plugin;
if (Config->get_use_lxvst()) {
VSTHandle* handle;
handle = vstfx_load(path.c_str());
if (handle == NULL) {
error << string_compose(_("LXVST: cannot load module from \"%1\""), path) << endmsg;
}
else {
plugin.reset (new LXVSTPlugin (session.engine(), session, handle, PBD::atoi(unique_id)));
}
}
else {
error << _("You asked ardour to not use any LXVST plugins") << endmsg;
return PluginPtr ((Plugin*) 0);
}
plugin->set_info(PluginInfoPtr(new LXVSTPluginInfo(*this)));
return plugin;
}
catch (failed_constructor &err) {
return PluginPtr ((Plugin*) 0);
}
}
std::vector<Plugin::PresetRecord>
LXVSTPluginInfo::get_presets (bool user_only) const
{
std::vector<Plugin::PresetRecord> p;
#ifndef NO_PLUGIN_STATE
if (!Config->get_use_lxvst()) {
return p;
}
if (!user_only) {
// TODO - cache, instantiating the plugin can be heavy
/* Built-in presets */
VSTHandle* handle = vstfx_load(path.c_str());
Session::vst_current_loading_id = atoi (unique_id);
AEffect* plugin = handle->main_entry (Session::vst_callback);
Session::vst_current_loading_id = 0;
plugin->user = NULL;
plugin->dispatcher (plugin, effOpen, 0, 0, 0, 0); // :(
int const vst_version = plugin->dispatcher (plugin, effGetVstVersion, 0, 0, NULL, 0);
for (int i = 0; i < plugin->numPrograms; ++i) {
Plugin::PresetRecord r (string_compose (X_("VST:%1:%2"), unique_id, i), "", false);
if (vst_version >= 2) {
char buf[256];
if (plugin->dispatcher (plugin, 29, i, 0, buf, 0) == 1) {
r.label = buf;
} else {
r.label = string_compose (_("Preset %1"), i);
}
} else {
r.label = string_compose (_("Preset %1"), i);
}
p.push_back (r);
}
plugin->dispatcher (plugin, effMainsChanged, 0, 0, 0, 0);
plugin->dispatcher (plugin, effClose, 0, 0, 0, 0); // :(
if (handle->plugincnt) {
handle->plugincnt--;
}
vstfx_unload (handle);
}
/* user presets */
XMLTree* t = new XMLTree;
std::string pf = Glib::build_filename (ARDOUR::user_config_directory (), "presets", string_compose ("vst-%1", unique_id));
if (Glib::file_test (pf, Glib::FILE_TEST_EXISTS)) {
t->set_filename (pf);
if (t->read ()) { // TODO read names only. skip parsing the actual data
XMLNode* root = t->root ();
for (XMLNodeList::const_iterator i = root->children().begin(); i != root->children().end(); ++i) {
XMLProperty const * uri = (*i)->property (X_("uri"));
XMLProperty const * label = (*i)->property (X_("label"));
p.push_back (Plugin::PresetRecord (uri->value(), label->value(), true));
}
}
}
delete t;
#endif
return p;
}
LXVSTPluginInfo::LXVSTPluginInfo()
{
type = ARDOUR::LXVST;
}