gtk2_ardour/lv2_plugin_ui.cc

   1 /*
   2     Copyright (C) 2008-2011 Paul Davis
   3     Author: David Robillard
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include "ardour/lv2_plugin.h"
  22 #include "ardour/plugin_manager.h"
  23 #include "ardour/processor.h"
  24
  25 #include "ardour_ui.h"
  26 #include "gui_thread.h"
  27 #include "lv2_plugin_ui.h"
  28
  29 using namespace Gtk;
  30 using namespace ARDOUR;
  31 using namespace PBD;
  32
  33 #ifdef HAVE_NEW_SLV2
  34 SLV2UIHost LV2PluginUI::ui_host = NULL;
  35 #endif
  36
  37 void
  38 LV2PluginUI::lv2_ui_write(LV2UI_Controller controller,
  39                           uint32_t         port_index,
  40                           uint32_t         /*buffer_size*/,
  41                           uint32_t         /*format*/,
  42                           const void*      buffer)
  43 {
  44         LV2PluginUI* me = (LV2PluginUI*)controller;
  45         me->_controllables[port_index]->set_value(*(float*)buffer);
  46 }
  47
  48 void
  49 LV2PluginUI::on_external_ui_closed(LV2UI_Controller controller)
  50 {
  51         LV2PluginUI* me = (LV2PluginUI*)controller;
  52         me->_screen_update_connection.disconnect();
  53         me->_external_ui_ptr = NULL;
  54 }
  55
  56 void
  57 LV2PluginUI::parameter_changed(uint32_t port_index, float val)
  58 {
  59         PlugUIBase::parameter_changed(port_index, val);
  60
  61         if (val != _values[port_index]) {
  62                 parameter_update(port_index, val);
  63         }
  64 }
  65
  66 void
  67 LV2PluginUI::parameter_update(uint32_t port_index, float val)
  68 {
  69         if (!_inst) {
  70                 return;
  71         }
  72
  73 #ifdef HAVE_NEW_SLV2
  74         slv2_ui_instance_port_event(_inst, port_index, 4, 0, &val);
  75 #else
  76         const LV2UI_Descriptor* ui_desc   = slv2_ui_instance_get_descriptor(_inst);
  77         LV2UI_Handle            ui_handle = slv2_ui_instance_get_handle(_inst);
  78         if (ui_desc->port_event) {
  79                 ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
  80         }
  81 #endif
  82         _values[port_index] = val;
  83 }
  84
  85 bool
  86 LV2PluginUI::start_updating(GdkEventAny*)
  87 {
  88         if (!_output_ports.empty()) {
  89                 _screen_update_connection.disconnect();
  90                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
  91                         (sigc::mem_fun(*this, &LV2PluginUI::output_update));
  92         }
  93         return false;
  94 }
  95
  96 bool
  97 LV2PluginUI::stop_updating(GdkEventAny*)
  98 {
  99         //cout << "stop_updating" << endl;
 100
 101         if ( //!_external_ui_ptr &&
 102             !_output_ports.empty()) {
 103                 _screen_update_connection.disconnect();
 104         }
 105         return false;
 106 }
 107
 108 void
 109 LV2PluginUI::output_update()
 110 {
 111         //cout << "output_update" << endl;
 112         if (_external_ui_ptr) {
 113                 LV2_EXTERNAL_UI_RUN(_external_ui_ptr);
 114         }
 115
 116         /* FIXME only works with control output ports (which is all we support now anyway) */
 117         uint32_t nports = _output_ports.size();
 118         for (uint32_t i = 0; i < nports; ++i) {
 119                 uint32_t index = _output_ports[i];
 120                 parameter_changed(index, _lv2->get_parameter(index));
 121         }
 122
 123 }
 124
 125 LV2PluginUI::LV2PluginUI(boost::shared_ptr<PluginInsert> pi,
 126                          boost::shared_ptr<LV2Plugin>    lv2p)
 127         : PlugUIBase(pi)
 128         , _lv2(lv2p)
 129         , _inst(NULL)
 130         , _values(NULL)
 131         , _external_ui_ptr(NULL)
 132 {
 133         if (!_lv2->is_external_ui()) {
 134                 lv2ui_instantiate("gtk2gui");
 135         }
 136 }
 137
 138 void
 139 LV2PluginUI::lv2ui_instantiate(const std::string& title)
 140 {
 141         LV2_Feature** features;
 142         LV2_Feature** features_src;
 143         LV2_Feature** features_dst;
 144         size_t        features_count;
 145         bool          is_external_ui;
 146
 147         is_external_ui = _lv2->is_external_ui();
 148
 149         if (is_external_ui) {
 150                 _external_ui_host.ui_closed       = LV2PluginUI::on_external_ui_closed;
 151                 _external_ui_host.plugin_human_id = strdup(title.c_str());
 152
 153                 _external_ui_feature.URI  = LV2_EXTERNAL_UI_URI;
 154                 _external_ui_feature.data = &_external_ui_host;
 155
 156                 features_src = features = (LV2_Feature**)_lv2->features();
 157                 features_count = 2;
 158                 while (*features++) {
 159                         features_count++;
 160                 }
 161                 features_dst = features = (LV2_Feature**)malloc(
 162                         sizeof(LV2_Feature*) * features_count);
 163                 features_dst[--features_count] = NULL;
 164                 features_dst[--features_count] = &_external_ui_feature;
 165                 while (features_count--) {
 166                         *features++ = *features_src++;
 167                 }
 168         } else {
 169                 features_dst = (LV2_Feature**)_lv2->features();
 170         }
 171
 172 #ifdef HAVE_NEW_SLV2
 173         if (!LV2PluginUI::ui_host) {
 174                 LV2PluginUI::ui_host = slv2_ui_host_new(
 175                 LV2PluginUI::lv2_ui_write, NULL, NULL, NULL);
 176         }
 177         SLV2Value gtk_ui = slv2_value_new_uri(
 178                 ARDOUR::PluginManager::the_manager()->lv2_world()->world,
 179                 "http://lv2plug.in/ns/extensions/ui#GtkUI");
 180         _inst = slv2_ui_instance_new(
 181                 _lv2->slv2_plugin(), _lv2->slv2_ui(), gtk_ui, ui_host, this, features_dst);
 182         slv2_value_free(gtk_ui);
 183         slv2_ui_host_free(ui_host);
 184 #else
 185         _inst = slv2_ui_instantiate(
 186                 _lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
 187                 features_dst);
 188 #endif
 189
 190         if (is_external_ui) {
 191                 free(features_dst);
 192         }
 193
 194         uint32_t num_ports = slv2_plugin_get_num_ports(_lv2->slv2_plugin());
 195         for (uint32_t i = 0; i < num_ports; ++i) {
 196                 if (_lv2->parameter_is_output(i)
 197                     && _lv2->parameter_is_control(i)
 198                     && is_update_wanted(i)) {
 199                         _output_ports.push_back(i);
 200                 }
 201         }
 202
 203         _external_ui_ptr = NULL;
 204         if (_inst) {
 205                 if (!is_external_ui) {
 206                         GtkWidget* c_widget = (GtkWidget*)slv2_ui_instance_get_widget(_inst);
 207                         _gui_widget = Glib::wrap(c_widget);
 208                         _gui_widget->show_all();
 209                         pack_start(*_gui_widget, true, true);
 210                 } else {
 211                         _external_ui_ptr = (struct lv2_external_ui*)slv2_ui_instance_get_widget(_inst);
 212                 }
 213         }
 214
 215         _values = new float[num_ports];
 216         _controllables.resize(num_ports);
 217         for (uint32_t i = 0; i < num_ports; ++i) {
 218                 bool     ok;
 219                 uint32_t port = _lv2->nth_parameter(i, ok);
 220                 if (ok) {
 221                         _values[port]        = _lv2->get_parameter(port);
 222                         _controllables[port] = boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (
 223                                 insert->control(Evoral::Parameter(PluginAutomation, 0, port)));
 224
 225                         if (_lv2->parameter_is_control(port) && _lv2->parameter_is_input(port)) {
 226                                 parameter_update(port, _values[port]);
 227                         }
 228                 }
 229         }
 230 }
 231
 232 LV2PluginUI::~LV2PluginUI ()
 233 {
 234         //cout << "LV2PluginUI destructor called" << endl;
 235
 236         if (_values) {
 237                 delete[] _values;
 238         }
 239
 240         /* Close and delete GUI. */
 241 #ifdef HAVE_NEW_SLV2
 242         slv2_ui_instance_free(_inst);
 243 #else
 244         const LV2UI_Descriptor* ui_desc   = slv2_ui_instance_get_descriptor(_inst);
 245         LV2UI_Handle            ui_handle = slv2_ui_instance_get_handle(_inst);
 246
 247         if (ui_desc) {
 248                 ui_desc->cleanup(ui_handle);
 249         }
 250 #endif
 251
 252         _screen_update_connection.disconnect();
 253
 254         if (_lv2->is_external_ui()) {
 255                 /* External UI is no longer valid.
 256                    on_window_hide() will not try to use it if is NULL.
 257                 */
 258                 _external_ui_ptr = NULL;
 259         }
 260 }
 261
 262 int
 263 LV2PluginUI::get_preferred_height()
 264 {
 265         Gtk::Requisition r = size_request();
 266         return r.height;
 267 }
 268
 269 int
 270 LV2PluginUI::get_preferred_width()
 271 {
 272         Gtk::Requisition r = size_request();
 273         return r.width;
 274 }
 275
 276 int
 277 LV2PluginUI::package(Gtk::Window& win)
 278 {
 279         if (_external_ui_ptr) {
 280                 _win_ptr = &win;
 281         } else {
 282                 /* forward configure events to plugin window */
 283                 win.signal_configure_event().connect(
 284                         sigc::mem_fun(*this, &LV2PluginUI::configure_handler));
 285                 win.signal_map_event().connect(
 286                         sigc::mem_fun(*this, &LV2PluginUI::start_updating));
 287                 win.signal_unmap_event().connect(
 288                         sigc::mem_fun(*this, &LV2PluginUI::stop_updating));
 289         }
 290         return 0;
 291 }
 292
 293 bool
 294 LV2PluginUI::configure_handler(GdkEventConfigure*)
 295 {
 296         std::cout << "CONFIGURE" << std::endl;
 297         return false;
 298 }
 299
 300 bool
 301 LV2PluginUI::is_update_wanted(uint32_t /*index*/)
 302 {
 303         /* FIXME: use port notification properties
 304            and/or new UI extension subscription methods
 305         */
 306         return true;
 307 }
 308
 309 bool
 310 LV2PluginUI::on_window_show(const std::string& title)
 311 {
 312         //cout << "on_window_show - " << title << endl; flush(cout);
 313
 314         if (_lv2->is_external_ui()) {
 315                 if (_external_ui_ptr) {
 316                         LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 317                         return false;
 318                 }
 319                 lv2ui_instantiate(title);
 320                 if (!_external_ui_ptr) {
 321                         return false;
 322                 }
 323
 324                 LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 325                 _screen_update_connection.disconnect();
 326                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
 327                         (sigc::mem_fun(*this, &LV2PluginUI::output_update));
 328                 return false;
 329         }
 330
 331         return true;
 332 }
 333
 334 void
 335 LV2PluginUI::on_window_hide()
 336 {
 337         //cout << "on_window_hide" << endl; flush(cout);
 338
 339         if (_external_ui_ptr) {
 340                 LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
 341                 //slv2_ui_instance_get_descriptor(_inst)->cleanup(_inst);
 342                 //_external_ui_ptr = NULL;
 343                 //_screen_update_connection.disconnect();
 344         }
 345 }