git.sesse.net Git - nageru/blob - mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <signal.h>
   6 #include <algorithm>
   7 #include <string>
   8 #include <vector>
   9 #include <QBoxLayout>
  10 #include <QKeySequence>
  11 #include <QLabel>
  12 #include <QMetaType>
  13 #include <QPushButton>
  14 #include <QResizeEvent>
  15 #include <QShortcut>
  16 #include <QSize>
  17 #include <QString>
  18
  19 #include "aboutdialog.h"
  20 #include "glwidget.h"
  21 #include "lrameter.h"
  22 #include "mixer.h"
  23 #include "post_to_main_thread.h"
  24 #include "ui_display.h"
  25 #include "ui_mainwindow.h"
  26 #include "vumeter.h"
  27
  28 class QResizeEvent;
  29
  30 using namespace std;
  31 using namespace std::placeholders;
  32
  33 Q_DECLARE_METATYPE(std::vector<std::string>);
  34
  35 namespace {
  36
  37 void schedule_cut_signal(int ignored)
  38 {
  39         global_mixer->schedule_cut();
  40 }
  41
  42 }  // namespace
  43
  44 MainWindow *global_mainwindow = nullptr;
  45
  46 MainWindow::MainWindow()
  47         : ui(new Ui::MainWindow)
  48 {
  49         global_mainwindow = this;
  50         ui->setupUi(this);
  51
  52         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  53         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  54
  55         // The menus.
  56         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
  57         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  58         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered),
  59
  60         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
  61         // TODO: Make them dynamic.
  62         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
  63         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
  64         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
  65
  66         // Aiee...
  67         transition_btn1 = ui->transition_btn1;
  68         transition_btn2 = ui->transition_btn2;
  69         transition_btn3 = ui->transition_btn3;
  70         qRegisterMetaType<vector<string>>("std::vector<std::string>");
  71         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  72         qRegisterMetaType<Mixer::Output>("Mixer::Output");
  73 }
  74
  75 void MainWindow::resizeEvent(QResizeEvent* event)
  76 {
  77         QMainWindow::resizeEvent(event);
  78
  79         // Ask for a relayout, but only after the event loop is done doing relayout
  80         // on everything else.
  81         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  82 }
  83
  84 void MainWindow::mixer_created(Mixer *mixer)
  85 {
  86         // Make the previews.
  87         unsigned num_previews = mixer->get_num_channels();
  88
  89         for (unsigned i = 0; i < num_previews; ++i) {
  90                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  91
  92                 QWidget *preview = new QWidget(this);
  93                 Ui::Display *ui_display = new Ui::Display;
  94                 ui_display->setupUi(preview);
  95                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
  96                 ui_display->display->set_output(output);
  97                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
  98                 previews.push_back(ui_display);
  99
 100                 // Hook up the click.
 101                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 102
 103                 // Let the theme update the text whenever the resolution or color changed.
 104                 connect(ui_display->display, &GLWidget::resolution_updated, this, &MainWindow::update_channel_name);
 105                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 106
 107                 // Hook up the keyboard key.
 108                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 109                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 110
 111                 // Hook up the white balance button (irrelevant if invisible).
 112                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 113                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 114         }
 115
 116         char buf[256];
 117         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 118         ui->limiter_threshold_db_display->setText(buf);
 119         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 120         ui->compressor_threshold_db_display->setText(buf);
 121
 122         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 123         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 124         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 125                 global_mixer->set_locut_enabled(state == Qt::Checked);
 126         });
 127
 128         // Not QDial::valueChanged, as we call setValue() all the time.
 129         connect(ui->gainstaging_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::gain_staging_knob_changed);
 130         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 131                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 132         });
 133         connect(ui->makeup_gain_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::final_makeup_gain_knob_changed);
 134         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 135                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 136         });
 137
 138         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 139         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 140         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 141                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 142         });
 143         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 144                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 145         });
 146         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 147         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 148
 149         struct sigaction act;
 150         act.sa_handler = schedule_cut_signal;
 151         act.sa_flags = SA_RESTART;
 152         sigaction(SIGHUP, &act, nullptr);
 153 }
 154
 155 void MainWindow::mixer_shutting_down()
 156 {
 157         ui->me_live->clean_context();
 158         ui->me_preview->clean_context();
 159         for (Ui::Display *display : previews) {
 160                 display->display->clean_context();
 161         }
 162 }
 163
 164 void MainWindow::cut_triggered()
 165 {
 166         global_mixer->schedule_cut();
 167 }
 168
 169 void MainWindow::exit_triggered()
 170 {
 171         close();
 172 }
 173
 174 void MainWindow::about_triggered()
 175 {
 176         AboutDialog().exec();
 177 }
 178
 179 void MainWindow::gain_staging_knob_changed(int value)
 180 {
 181         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 182
 183         float gain_db = value * 0.1f;
 184         global_mixer->set_gain_staging_db(gain_db);
 185
 186         // The label will be updated by the audio level callback.
 187 }
 188
 189 void MainWindow::final_makeup_gain_knob_changed(int value)
 190 {
 191         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 192
 193         float gain_db = value * 0.1f;
 194         global_mixer->set_final_makeup_gain_db(gain_db);
 195
 196         // The label will be updated by the audio level callback.
 197 }
 198
 199 void MainWindow::cutoff_knob_changed(int value)
 200 {
 201         float octaves = value * 0.1f;
 202         float cutoff_hz = 20.0 * pow(2.0, octaves);
 203         global_mixer->set_locut_cutoff(cutoff_hz);
 204
 205         char buf[256];
 206         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 207         ui->locut_cutoff_display->setText(buf);
 208 }
 209
 210 void MainWindow::limiter_threshold_knob_changed(int value)
 211 {
 212         float threshold_dbfs = value * 0.1f;
 213         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 214
 215         char buf[256];
 216         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 217         ui->limiter_threshold_db_display->setText(buf);
 218 }
 219
 220 void MainWindow::compressor_threshold_knob_changed(int value)
 221 {
 222         float threshold_dbfs = value * 0.1f;
 223         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 224
 225         char buf[256];
 226         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 227         ui->compressor_threshold_db_display->setText(buf);
 228 }
 229
 230 void MainWindow::reset_meters_button_clicked()
 231 {
 232         global_mixer->reset_meters();
 233         ui->peak_display->setText("-inf");
 234         ui->peak_display->setStyleSheet("");
 235 }
 236
 237 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 238                                       float range_low_lufs, float range_high_lufs,
 239                                       float gain_staging_db, float final_makeup_gain_db,
 240                                       float correlation)
 241 {
 242         timeval now;
 243         gettimeofday(&now, nullptr);
 244
 245         // The meters are somewhat inefficient to update. Only update them
 246         // every 100 ms or so (we get updates every 5–20 ms).
 247         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 248                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 249         if (last_update_age < 0.100) {
 250                 return;
 251         }
 252         last_audio_level_callback = now;
 253
 254         post_to_main_thread([=]() {
 255                 ui->vu_meter->set_level(level_lufs);
 256                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 257                 ui->correlation_meter->set_correlation(correlation);
 258
 259                 char buf[256];
 260                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 261                 ui->peak_display->setText(buf);
 262                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 263                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 264                 } else {
 265                         ui->peak_display->setStyleSheet("");
 266                 }
 267
 268                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 269                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 270                 ui->gainstaging_db_display->setText(buf);
 271
 272                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 273                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 274                 ui->makeup_gain_db_display->setText(buf);
 275         });
 276 }
 277
 278 void MainWindow::relayout()
 279 {
 280         int height = ui->vertical_layout->geometry().height();
 281
 282         double remaining_height = height;
 283
 284         // Allocate the height; the most important part is to keep the main displays
 285         // at 16:9 if at all possible.
 286         double me_width = ui->me_preview->width();
 287         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 288
 289         // TODO: Scale the widths when we need to do this.
 290         if (me_height / double(height) > 0.8) {
 291                 me_height = height * 0.8;
 292         }
 293         remaining_height -= me_height + ui->vertical_layout->spacing();
 294
 295         double audiostrip_height = ui->audiostrip->geometry().height();
 296         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 297
 298         // The previews will be constrained by the remaining height, and the width.
 299         double preview_label_height = previews[0]->title_bar->geometry().height() +
 300                 previews[0]->main_vertical_layout->spacing();
 301         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 302         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 303         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 304
 305         ui->vertical_layout->setStretch(0, lrintf(me_height));
 306         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 307         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 308         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 309
 310         // Set the widths for the previews.
 311         double preview_width = preview_height * 16.0 / 9.0;
 312         for (unsigned i = 0; i < previews.size(); ++i) {
 313                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 314         }
 315
 316         // The preview horizontal spacer.
 317         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 318         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 319 }
 320
 321 void MainWindow::set_transition_names(vector<string> transition_names)
 322 {
 323         if (transition_names.size() < 1 || transition_names[0].empty()) {
 324                 transition_btn1->setText(QString(""));
 325         } else {
 326                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 327                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 328         }
 329         if (transition_names.size() < 2 || transition_names[1].empty()) {
 330                 transition_btn2->setText(QString(""));
 331         } else {
 332                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 333                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 334         }
 335         if (transition_names.size() < 3 || transition_names[2].empty()) {
 336                 transition_btn3->setText(QString(""));
 337         } else {
 338                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 339                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 340         }
 341 }
 342
 343 void MainWindow::update_channel_name(Mixer::Output output)
 344 {
 345         if (output >= Mixer::OUTPUT_INPUT0) {
 346                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 347                 previews[channel]->label->setText(global_mixer->get_channel_name(output).c_str());
 348         }
 349 }
 350
 351 void MainWindow::update_channel_color(Mixer::Output output)
 352 {
 353         if (output >= Mixer::OUTPUT_INPUT0) {
 354                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 355                 string color = global_mixer->get_channel_color(output);
 356                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 357         }
 358 }
 359
 360 void MainWindow::transition_clicked(int transition_number)
 361 {
 362         global_mixer->transition_clicked(transition_number);
 363 }
 364
 365 void MainWindow::channel_clicked(int channel_number)
 366 {
 367         if (current_wb_pick_display == channel_number) {
 368                 // The picking was already done from eventFilter(), since we don't get
 369                 // the mouse pointer here.
 370         } else {
 371                 global_mixer->channel_clicked(channel_number);
 372         }
 373 }
 374
 375 void MainWindow::wb_button_clicked(int channel_number)
 376 {
 377         current_wb_pick_display = channel_number;
 378         QApplication::setOverrideCursor(Qt::CrossCursor);
 379 }
 380
 381 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 382 {
 383         if (current_wb_pick_display != -1 &&
 384             event->type() == QEvent::MouseButtonRelease &&
 385             watched->isWidgetType()) {
 386                 QApplication::restoreOverrideCursor();
 387                 if (watched == previews[current_wb_pick_display]->display) {
 388                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 389                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 390                 } else {
 391                         // The user clicked on something else, give up.
 392                         // (The click goes through, which might not be ideal, but, yes.)
 393                         current_wb_pick_display = -1;
 394                 }
 395         }
 396         return false;
 397 }
 398
 399 namespace {
 400
 401 double srgb_to_linear(double x)
 402 {
 403         if (x < 0.04045) {
 404                 return x / 12.92;
 405         } else {
 406                 return pow((x + 0.055) / 1.055, 2.4);
 407         }
 408 }
 409
 410 }  // namespace
 411
 412 void MainWindow::set_white_balance(int channel_number, int x, int y)
 413 {
 414         // Set the white balance to neutral for the grab. It's probably going to
 415         // flicker a bit, but hopefully this display is not live anyway.
 416         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 417         previews[channel_number]->display->updateGL();
 418         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 419
 420         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 421         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 422         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 423         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 424         previews[channel_number]->display->updateGL();
 425 }