+
+void GLWidget::show_context_menu(unsigned signal_num, const QPoint &pos)
+{
+ QPoint global_pos = mapToGlobal(pos);
+
+ QMenu menu;
+
+ // Add a submenu for selecting input card, with an action for each card.
+ QMenu card_submenu;
+ QActionGroup card_group(&card_submenu);
+
+ unsigned num_cards = global_mixer->get_num_cards();
+ unsigned current_card = global_mixer->map_signal(signal_num);
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ QString description(QString::fromStdString(global_mixer->get_card_description(card_index)));
+ QAction *action = new QAction(description, &card_group);
+ action->setCheckable(true);
+ if (current_card == card_index) {
+ action->setChecked(true);
+ }
+ action->setData(QList<QVariant>{"card", card_index});
+ card_submenu.addAction(action);
+ }
+
+ card_submenu.setTitle("Input source");
+ menu.addMenu(&card_submenu);
+
+ // --- The choices in the next few options depend a lot on which card is active ---
+
+ // Add a submenu for selecting video input, with an action for each input.
+ QMenu video_input_submenu;
+ QActionGroup video_input_group(&video_input_submenu);
+ std::map<uint32_t, string> video_inputs = global_mixer->get_available_video_inputs(current_card);
+ uint32_t current_video_input = global_mixer->get_current_video_input(current_card);
+ for (const auto &mode : video_inputs) {
+ QString description(QString::fromStdString(mode.second));
+ QAction *action = new QAction(description, &video_input_group);
+ action->setCheckable(true);
+ if (mode.first == current_video_input) {
+ action->setChecked(true);
+ }
+ action->setData(QList<QVariant>{"video_input", mode.first});
+ video_input_submenu.addAction(action);
+ }
+
+ video_input_submenu.setTitle("Video input");
+ menu.addMenu(&video_input_submenu);
+
+ // The same for audio input.
+ QMenu audio_input_submenu;
+ QActionGroup audio_input_group(&audio_input_submenu);
+ std::map<uint32_t, string> audio_inputs = global_mixer->get_available_audio_inputs(current_card);
+ uint32_t current_audio_input = global_mixer->get_current_audio_input(current_card);
+ for (const auto &mode : audio_inputs) {
+ QString description(QString::fromStdString(mode.second));
+ QAction *action = new QAction(description, &audio_input_group);
+ action->setCheckable(true);
+ if (mode.first == current_audio_input) {
+ action->setChecked(true);
+ }
+ action->setData(QList<QVariant>{"audio_input", mode.first});
+ audio_input_submenu.addAction(action);
+ }
+
+ audio_input_submenu.setTitle("Audio input");
+ menu.addMenu(&audio_input_submenu);
+
+ // The same for resolution.
+ QMenu mode_submenu;
+ QActionGroup mode_group(&mode_submenu);
+ std::map<uint32_t, bmusb::VideoMode> video_modes = global_mixer->get_available_video_modes(current_card);
+ uint32_t current_video_mode = global_mixer->get_current_video_mode(current_card);
+ bool has_auto_mode = false;
+ for (const auto &mode : video_modes) {
+ QString description(QString::fromStdString(mode.second.name));
+ QAction *action = new QAction(description, &mode_group);
+ action->setCheckable(true);
+ if (mode.first == current_video_mode) {
+ action->setChecked(true);
+ }
+ action->setData(QList<QVariant>{"video_mode", mode.first});
+ mode_submenu.addAction(action);
+
+ // TODO: Relying on the 0 value here (from bmusb.h) is ugly, it should be a named constant.
+ if (mode.first == 0) {
+ has_auto_mode = true;
+ }
+ }
+
+ // Add a “scan” menu if there's no “auto” mode.
+ if (!has_auto_mode) {
+ QAction *action = new QAction("Scan", &mode_group);
+ action->setData(QList<QVariant>{"video_mode", 0});
+ mode_submenu.addSeparator();
+ mode_submenu.addAction(action);
+ }
+
+ mode_submenu.setTitle("Input mode");
+ menu.addMenu(&mode_submenu);
+
+ // --- End of card-dependent choices ---
+
+ // Add an audio source selector.
+ QAction *audio_source_action = new QAction("Use as audio source", &menu);
+ audio_source_action->setCheckable(true);
+ if (global_mixer->get_audio_source() == signal_num) {
+ audio_source_action->setChecked(true);
+ audio_source_action->setEnabled(false);
+ }
+ menu.addAction(audio_source_action);
+
+ // And a master clock selector.
+ QAction *master_clock_action = new QAction("Use as master clock", &menu);
+ master_clock_action->setCheckable(true);
+ if (global_mixer->get_master_clock() == signal_num) {
+ master_clock_action->setChecked(true);
+ master_clock_action->setEnabled(false);
+ }
+ menu.addAction(master_clock_action);
+
+ // Show the menu and look at the result.
+ QAction *selected_item = menu.exec(global_pos);
+ if (selected_item == audio_source_action) {
+ global_mixer->set_audio_source(signal_num);
+ } else if (selected_item == master_clock_action) {
+ global_mixer->set_master_clock(signal_num);
+ } else if (selected_item != nullptr) {
+ QList<QVariant> selected = selected_item->data().toList();
+ if (selected[0].toString() == "video_mode") {
+ uint32_t mode = selected[1].toUInt(nullptr);
+ if (mode == 0 && !has_auto_mode) {
+ global_mixer->start_mode_scanning(current_card);
+ } else {
+ global_mixer->set_video_mode(current_card, mode);
+ }
+ } else if (selected[0].toString() == "video_input") {
+ uint32_t input = selected[1].toUInt(nullptr);
+ global_mixer->set_video_input(current_card, input);
+ } else if (selected[0].toString() == "audio_input") {
+ uint32_t input = selected[1].toUInt(nullptr);
+ global_mixer->set_audio_input(current_card, input);
+ } else if (selected[0].toString() == "card") {
+ unsigned card_index = selected[1].toUInt(nullptr);
+ global_mixer->set_signal_mapping(signal_num, card_index);
+ } else {
+ assert(false);
+ }
+ }
+}