gtk2_ardour/lv2_plugin_ui.cc

   1 /*
   2     Copyright (C) 2008 Paul Davis
   3     Author: Dave 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/processor.h"
  22 #include "ardour/lv2_plugin.h"
  23
  24 #include "ardour_ui.h"
  25 #include "gui_thread.h"
  26 #include "lv2_plugin_ui.h"
  27
  28 using namespace Gtk;
  29 using namespace ARDOUR;
  30 using namespace PBD;
  31
  32 void
  33 LV2PluginUI::lv2_ui_write(
  34                 LV2UI_Controller controller,
  35                 uint32_t         port_index,
  36                 uint32_t         /*buffer_size*/,
  37                 uint32_t         /*format*/,
  38                 const void*      buffer)
  39 {
  40         //cout << "lv2_ui_write" << endl;
  41         LV2PluginUI* me = (LV2PluginUI*)controller;
  42         if (*(float*)buffer != me->_values[port_index]) {
  43                 //cout << "set_parameter " << port_index << ":"  << *(float*)buffer << endl;
  44                 me->_lv2->set_parameter(port_index, *(float*)buffer);
  45   }
  46 }
  47
  48 void LV2PluginUI::on_external_ui_closed(LV2UI_Controller controller)
  49 {
  50         LV2PluginUI* me = (LV2PluginUI*)controller;
  51         me->_screen_update_connection.disconnect();
  52         me->_external_ui_ptr = NULL;
  53 }
  54
  55 void
  56 LV2PluginUI::parameter_changed (uint32_t port_index, float val)
  57 {
  58         PlugUIBase::parameter_changed (port_index, val);
  59
  60         if (val != _values[port_index]) {
  61                 parameter_update(port_index, val);
  62         }
  63 }
  64
  65 void
  66 LV2PluginUI::parameter_update (uint32_t port_index, float val)
  67 {
  68         if (!_inst) {
  69                 return;
  70         }
  71
  72         const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
  73         LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
  74         if (ui_desc->port_event)
  75                 ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
  76         _values[port_index] = val;
  77 }
  78
  79 bool
  80 LV2PluginUI::start_updating(GdkEventAny*)
  81 {
  82         if (!_output_ports.empty()) {
  83                 _screen_update_connection.disconnect();
  84                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
  85                         (sigc::mem_fun(*this, &LV2PluginUI::output_update));
  86         }
  87         return false;
  88 }
  89
  90 bool
  91 LV2PluginUI::stop_updating(GdkEventAny*)
  92 {
  93         //cout << "stop_updating" << endl;
  94
  95         if (//!_external_ui_ptr &&
  96                         !_output_ports.empty()) {
  97                 _screen_update_connection.disconnect();
  98         }
  99         return false;
 100 }
 101
 102 void
 103 LV2PluginUI::output_update()
 104 {
 105         //cout << "output_update" << endl;
 106         if (_external_ui_ptr) {
 107                 LV2_EXTERNAL_UI_RUN(_external_ui_ptr);
 108         }
 109
 110         /* FIXME only works with control output ports (which is all we support now anyway) */
 111         uint32_t nports = _output_ports.size();
 112         for (uint32_t i = 0; i < nports; ++i) {
 113                 uint32_t index = _output_ports[i];
 114                 parameter_changed(index, _lv2->get_parameter(index));
 115         }
 116
 117 }
 118
 119 LV2PluginUI::LV2PluginUI (boost::shared_ptr<PluginInsert> pi, boost::shared_ptr<LV2Plugin> lv2p)
 120         : PlugUIBase (pi)
 121         , _lv2(lv2p)
 122         , _inst(NULL)
 123         , _values(NULL)
 124         , _external_ui_ptr(NULL)
 125 {
 126         if (!_lv2->is_external_ui()) {
 127                 lv2ui_instantiate("gtk2gui");
 128         }
 129 }
 130
 131 void
 132 LV2PluginUI::lv2ui_instantiate(const std::string& title)
 133 {
 134         LV2_Feature** features;
 135         LV2_Feature** features_src;
 136         LV2_Feature** features_dst;
 137         size_t features_count;
 138         bool is_external_ui;
 139
 140         is_external_ui = _lv2->is_external_ui();
 141
 142         if (is_external_ui) {
 143                 _external_ui_host.ui_closed = LV2PluginUI::on_external_ui_closed;
 144                 _external_ui_host.plugin_human_id = strdup(title.c_str());
 145
 146                 _external_ui_feature.URI = LV2_EXTERNAL_UI_URI;
 147                 _external_ui_feature.data = &_external_ui_host;
 148
 149                 features_src = features = (LV2_Feature**)_lv2->features();
 150                 features_count = 2;
 151                 while (*features++) {
 152                         features_count++;
 153                 }
 154
 155                 features_dst = features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * features_count);
 156                 features_dst[--features_count] = NULL;
 157                 features_dst[--features_count] = &_external_ui_feature;
 158                 while (features_count--) {
 159                         *features++ = *features_src++;
 160                 }
 161         } else {
 162                 features_dst = (LV2_Feature**)_lv2->features();
 163         }
 164
 165         _inst = slv2_ui_instantiate(
 166                         _lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
 167                         features_dst);
 168
 169         if (is_external_ui) {
 170                 free(features_dst);
 171         }
 172
 173         uint32_t num_ports = slv2_plugin_get_num_ports(_lv2->slv2_plugin());
 174         for (uint32_t i = 0; i < num_ports; ++i) {
 175                 if (_lv2->parameter_is_output(i) && _lv2->parameter_is_control(i) && is_update_wanted(i)) {
 176                         _output_ports.push_back(i);
 177                 }
 178         }
 179
 180         _external_ui_ptr = NULL;
 181         if (_inst) {
 182                 if (!is_external_ui) {
 183                         GtkWidget* c_widget = (GtkWidget*)slv2_ui_instance_get_widget(_inst);
 184                         _gui_widget = Glib::wrap(c_widget);
 185                         _gui_widget->show_all();
 186                         pack_start(*_gui_widget, true, true);
 187                 } else {
 188                         _external_ui_ptr = (struct lv2_external_ui *)slv2_ui_instance_get_widget(_inst);
 189                 }
 190         }
 191
 192         _values = new float[num_ports];
 193         for (uint32_t i = 0; i < num_ports; ++i) {
 194                 bool ok;
 195                 uint32_t port = _lv2->nth_parameter(i, ok);
 196                 if (ok) {
 197                         _values[port] = _lv2->get_parameter(port);
 198                         if (_lv2->parameter_is_control(port) && _lv2->parameter_is_input(port)) {
 199                                 parameter_update(port, _values[port]);
 200                         }
 201                 }
 202         }
 203 }
 204
 205 LV2PluginUI::~LV2PluginUI ()
 206 {
 207         //cout << "LV2PluginUI destructor called" << endl;
 208
 209         if (_values) {
 210                 delete[] _values;
 211         }
 212         // plugin destructor destroys the GTK GUI
 213
 214
 215         const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
 216         LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
 217
 218         /*Call cleanup to tell the plugin to close its GUI and delete it*/
 219
 220         if (ui_desc) {
 221                 ui_desc->cleanup(ui_handle);
 222         }
 223
 224         _screen_update_connection.disconnect();
 225
 226         if (_lv2->is_external_ui()) {
 227                 /*external UI is no longer valid - on_window_hide() will not try to use it if is NULL*/
 228                 _external_ui_ptr = NULL;
 229         }
 230 }
 231
 232 int
 233 LV2PluginUI::get_preferred_height ()
 234 {
 235         Gtk::Requisition r = size_request();
 236         return r.height;
 237 }
 238
 239 int
 240 LV2PluginUI::get_preferred_width ()
 241 {
 242         Gtk::Requisition r = size_request();
 243         return r.width;
 244 }
 245
 246 int
 247 LV2PluginUI::package (Gtk::Window& win)
 248 {
 249         //cout << "package" << endl;
 250         if (_external_ui_ptr) {
 251                 _win_ptr = &win;
 252         } else {
 253                 /* forward configure events to plugin window */
 254                 win.signal_configure_event().connect (sigc::mem_fun (*this, &LV2PluginUI::configure_handler));
 255                 win.signal_map_event().connect (sigc::mem_fun (*this, &LV2PluginUI::start_updating));
 256                 win.signal_unmap_event().connect (sigc::mem_fun (*this, &LV2PluginUI::stop_updating));
 257         }
 258         return 0;
 259 }
 260
 261 bool
 262 LV2PluginUI::configure_handler (GdkEventConfigure*)
 263 {
 264         std::cout << "CONFIGURE" << std::endl;
 265         return false;
 266 }
 267
 268 bool
 269 LV2PluginUI::is_update_wanted(uint32_t /*index*/)
 270 {
 271         /* FIXME this should check the port notification properties, which nobody sets now anyway :) */
 272         return true;
 273 }
 274
 275 bool
 276 LV2PluginUI::on_window_show(const std::string& title)
 277 {
 278         //cout << "on_window_show - " << title << endl; flush(cout);
 279
 280         if (_lv2->is_external_ui()) {
 281                 if (_external_ui_ptr) {
 282                         LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 283                         return false;
 284                 }
 285                 lv2ui_instantiate(title);
 286                 if (!_external_ui_ptr) {
 287                         return false;
 288                 }
 289
 290                 LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 291                 _screen_update_connection.disconnect();
 292                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
 293                         (sigc::mem_fun(*this, &LV2PluginUI::output_update));
 294                 return false;
 295         }
 296
 297         return true;
 298 }
 299
 300 void
 301 LV2PluginUI::on_window_hide()
 302 {
 303         //cout << "on_window_hide" << endl; flush(cout);
 304
 305         if (_external_ui_ptr) {
 306                 LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
 307                 //slv2_ui_instance_get_descriptor(_inst)->cleanup(_inst);
 308                 //_external_ui_ptr = NULL;
 309                 //_screen_update_connection.disconnect();
 310         }
 311 }