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/insert.h>
  22 #include <ardour/lv2_plugin.h>
  23
  24 #include "ardour_ui.h"
  25 #include "lv2_plugin_ui.h"
  26
  27 using namespace Gtk;
  28 using namespace ARDOUR;
  29 using namespace PBD;
  30
  31 void
  32 LV2PluginUI::lv2_ui_write(LV2UI_Controller controller,
  33              uint32_t         port_index,
  34              uint32_t         buffer_size,
  35              uint32_t         format,
  36              const void*      buffer)
  37 {
  38         //cout << "lv2_ui_write" << endl;
  39         LV2PluginUI* me = (LV2PluginUI*)controller;
  40         if (*(float*)buffer != me->_values[port_index]) {
  41                 //cout << "set_parameter " << port_index << ":"  << *(float*)buffer << endl;
  42                 me->_lv2->set_parameter(port_index, *(float*)buffer);
  43   }
  44 }
  45
  46 void LV2PluginUI::on_external_ui_closed(LV2UI_Controller controller)
  47 {
  48         LV2PluginUI* me = (LV2PluginUI*)controller;
  49         me->_screen_update_connection.disconnect();
  50         me->_external_ui_ptr = NULL;
  51 }
  52
  53 void
  54 LV2PluginUI::parameter_changed (uint32_t port_index, float val)
  55 {
  56         //cout << "parameter_changed" << endl;
  57         if (val != _values[port_index]) {
  58                 parameter_update(port_index, val);
  59         }
  60 }
  61
  62 void
  63 LV2PluginUI::parameter_update (uint32_t port_index, float val)
  64 {
  65         if (!_inst) {
  66                 return;
  67         }
  68
  69         const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
  70         LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
  71         if (ui_desc->port_event) {
  72                 //cout << "port_event " << port_index << ":" << val << endl;
  73                 ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
  74   }
  75         _values[port_index] = val;
  76 }
  77
  78 bool
  79 LV2PluginUI::start_updating(GdkEventAny* event)
  80 {
  81         //cout << "start_updating" << endl;
  82
  83         if (!_output_ports.empty()) {
  84                 _screen_update_connection.disconnect();
  85                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
  86                         (mem_fun(*this, &LV2PluginUI::output_update));
  87         }
  88         return false;
  89 }
  90
  91 bool
  92 LV2PluginUI::stop_updating(GdkEventAny* event)
  93 {
  94         //cout << "stop_updating" << endl;
  95
  96         if (//!_external_ui_ptr &&
  97                         !_output_ports.empty()) {
  98                 _screen_update_connection.disconnect();
  99         }
 100         return false;
 101 }
 102
 103 void
 104 LV2PluginUI::output_update()
 105 {
 106         //cout << "output_update" << endl;
 107         if (_external_ui_ptr) {
 108                 LV2_EXTERNAL_UI_RUN(_external_ui_ptr);
 109         }
 110
 111         /* FIXME only works with control output ports (which is all we support now anyway) */
 112         uint32_t nports = _output_ports.size();
 113         for (uint32_t i = 0; i < nports; ++i) {
 114                 uint32_t index = _output_ports[i];
 115                 parameter_changed(index, _lv2->get_parameter(index));
 116         }
 117
 118 }
 119
 120 LV2PluginUI::LV2PluginUI (boost::shared_ptr<PluginInsert> pi, boost::shared_ptr<LV2Plugin> lv2p)
 121         : PlugUIBase (pi)
 122         , _lv2(lv2p)
 123         , _inst(NULL)
 124         , _values(NULL)
 125         , _external_ui_ptr(NULL)
 126 {
 127         if (!_lv2->is_external_ui()) {
 128                 lv2ui_instantiate("gtk2gui");
 129         }
 130 }
 131
 132 void
 133 LV2PluginUI::lv2ui_instantiate(const Glib::ustring& title)
 134 {
 135         LV2_Feature** features;
 136         LV2_Feature** features_src;
 137         LV2_Feature** features_dst;
 138         size_t features_count;
 139         bool is_external_ui;
 140
 141         is_external_ui = _lv2->is_external_ui();
 142
 143         if (is_external_ui) {
 144                 _external_ui_host.ui_closed = LV2PluginUI::on_external_ui_closed;
 145                 _external_ui_host.plugin_human_id = strdup(title.c_str());
 146
 147                 _external_ui_feature.URI = LV2_EXTERNAL_UI_URI;
 148                 _external_ui_feature.data = &_external_ui_host;
 149
 150                 features_src = features = (LV2_Feature**)_lv2->features();
 151                 features_count = 2;
 152                 while (*features++) {
 153                         features_count++;
 154                 }
 155
 156                 features_dst = features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * features_count);
 157                 features_dst[--features_count] = NULL;
 158                 features_dst[--features_count] = &_external_ui_feature;
 159                 while (features_count--) {
 160                         *features++ = *features_src++;
 161                 }
 162         } else {
 163                 features_dst = (LV2_Feature**)_lv2->features();
 164         }
 165
 166         _inst = slv2_ui_instantiate(
 167                         _lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
 168                         features_dst);
 169
 170         if (is_external_ui) {
 171                 free(features_dst);
 172         }
 173
 174         uint32_t num_ports = slv2_plugin_get_num_ports(_lv2->slv2_plugin());
 175         for (uint32_t i = 0; i < num_ports; ++i) {
 176                 if (_lv2->parameter_is_output(i) && _lv2->parameter_is_control(i) && is_update_wanted(i)) {
 177                         _output_ports.push_back(i);
 178                 }
 179         }
 180
 181         _external_ui_ptr = NULL;
 182         if (_inst) {
 183                 if (!is_external_ui) {
 184                         GtkWidget* c_widget = (GtkWidget*)slv2_ui_instance_get_widget(_inst);
 185                         _gui_widget = Glib::wrap(c_widget);
 186                         _gui_widget->show_all();
 187                         pack_start(*_gui_widget, true, true);
 188                 } else {
 189                         _external_ui_ptr = (struct lv2_external_ui *)slv2_ui_instance_get_widget(_inst);
 190                 }
 191         }
 192
 193         _values = new float[num_ports];
 194         for (uint32_t i = 0; i < num_ports; ++i) {
 195                 bool ok;
 196                 uint32_t port = _lv2->nth_parameter(i, ok);
 197                 if (ok) {
 198                         _values[port] = _lv2->get_parameter(port);
 199                         if (_lv2->parameter_is_control(port) && _lv2->parameter_is_input(port)) {
 200                                 parameter_update(port, _values[port]);
 201                         }
 202                 }
 203         }
 204
 205         _lv2->ParameterChanged.connect(mem_fun(*this, &LV2PluginUI::parameter_changed));
 206 }
 207
 208 LV2PluginUI::~LV2PluginUI ()
 209 {
 210         //cout << "LV2PluginUI destructor called" << endl;
 211
 212         if (_values) {
 213                 delete[] _values;
 214         }
 215
 216
 217         const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
 218         LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
 219
 220         /*Call cleanup to tell the plugin to close its GUI and delete it*/
 221
 222         if (ui_desc) {
 223                 ui_desc->cleanup(ui_handle);
 224         }
 225
 226         _screen_update_connection.disconnect();
 227
 228         if (_lv2->is_external_ui()) {
 229                 /*external UI is no longer valid - on_window_hide() will not try to use it if is NULL*/
 230                 _external_ui_ptr = NULL;
 231         }
 232 }
 233
 234 int
 235 LV2PluginUI::get_preferred_height ()
 236 {
 237         Gtk::Requisition r = size_request();
 238         return r.height;
 239 }
 240
 241 int
 242 LV2PluginUI::get_preferred_width ()
 243 {
 244         Gtk::Requisition r = size_request();
 245         return r.width;
 246 }
 247
 248 int
 249 LV2PluginUI::package (Gtk::Window& win)
 250 {
 251         //cout << "package" << endl;
 252         if (_external_ui_ptr) {
 253                 _win_ptr = &win;
 254         } else {
 255                 /* forward configure events to plugin window */
 256                 win.signal_configure_event().connect (mem_fun (*this, &LV2PluginUI::configure_handler));
 257                 win.signal_map_event().connect (mem_fun (*this, &LV2PluginUI::start_updating));
 258                 win.signal_unmap_event().connect (mem_fun (*this, &LV2PluginUI::stop_updating));
 259         }
 260         return 0;
 261 }
 262
 263 bool
 264 LV2PluginUI::configure_handler (GdkEventConfigure* ev)
 265 {
 266         cout << "CONFIGURE" << endl;
 267         return false;
 268 }
 269
 270 bool
 271 LV2PluginUI::is_update_wanted(uint32_t index)
 272 {
 273         /* FIXME this should check the port notification properties, which nobody sets now anyway :) */
 274         return true;
 275 }
 276
 277 bool
 278 LV2PluginUI::on_window_show(const Glib::ustring& title)
 279 {
 280         //cout << "on_window_show - " << title << endl; flush(cout);
 281
 282         if (_lv2->is_external_ui()) {
 283                 if (_external_ui_ptr) {
 284                         LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 285                         return false;
 286                 }
 287                 lv2ui_instantiate(title);
 288                 if (!_external_ui_ptr) {
 289                         return false;
 290                 }
 291
 292                 LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
 293                 _screen_update_connection.disconnect();
 294                 _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
 295                         (mem_fun(*this, &LV2PluginUI::output_update));
 296                 return false;
 297         }
 298
 299         return true;
 300 }
 301
 302 void
 303 LV2PluginUI::on_window_hide()
 304 {
 305         //cout << "on_window_hide" << endl; flush(cout);
 306
 307         if (_external_ui_ptr) {
 308                 LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
 309                 //slv2_ui_instance_get_descriptor(_inst)->cleanup(_inst);
 310                 //_external_ui_ptr = NULL;
 311                 //_screen_update_connection.disconnect();
 312         }
 313 }