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::string);
  34 Q_DECLARE_METATYPE(std::vector<std::string>);
  35
  36 MainWindow *global_mainwindow = nullptr;
  37
  38 namespace {
  39
  40 void schedule_cut_signal(int ignored)
  41 {
  42         global_mixer->schedule_cut();
  43 }
  44
  45 void quit_signal(int ignored)
  46 {
  47         global_mainwindow->close();
  48 }
  49
  50 }  // namespace
  51
  52 MainWindow::MainWindow()
  53         : ui(new Ui::MainWindow)
  54 {
  55         global_mainwindow = this;
  56         ui->setupUi(this);
  57
  58         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  59         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  60
  61         // The menus.
  62         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
  63         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  64         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered),
  65
  66         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
  67         // TODO: Make them dynamic.
  68         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
  69         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
  70         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
  71
  72         // Aiee...
  73         transition_btn1 = ui->transition_btn1;
  74         transition_btn2 = ui->transition_btn2;
  75         transition_btn3 = ui->transition_btn3;
  76         qRegisterMetaType<string>("std::string");
  77         qRegisterMetaType<vector<string>>("std::vector<std::string>");
  78         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  79         qRegisterMetaType<Mixer::Output>("Mixer::Output");
  80 }
  81
  82 void MainWindow::resizeEvent(QResizeEvent* event)
  83 {
  84         QMainWindow::resizeEvent(event);
  85
  86         // Ask for a relayout, but only after the event loop is done doing relayout
  87         // on everything else.
  88         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  89 }
  90
  91 void MainWindow::mixer_created(Mixer *mixer)
  92 {
  93         // Make the previews.
  94         unsigned num_previews = mixer->get_num_channels();
  95
  96         for (unsigned i = 0; i < num_previews; ++i) {
  97                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  98
  99                 QWidget *preview = new QWidget(this);
 100                 Ui::Display *ui_display = new Ui::Display;
 101                 ui_display->setupUi(preview);
 102                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 103                 ui_display->display->set_output(output);
 104                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 105                 previews.push_back(ui_display);
 106
 107                 // Hook up the click.
 108                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 109
 110                 // Let the theme update the text whenever the resolution or color changed.
 111                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 112                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 113
 114                 // Hook up the keyboard key.
 115                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 116                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 117
 118                 // Hook up the white balance button (irrelevant if invisible).
 119                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 120                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 121         }
 122
 123         char buf[256];
 124         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 125         ui->limiter_threshold_db_display->setText(buf);
 126         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 127         ui->compressor_threshold_db_display->setText(buf);
 128
 129         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 130         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 131         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 132                 global_mixer->set_locut_enabled(state == Qt::Checked);
 133         });
 134
 135         // Not QDial::valueChanged, as we call setValue() all the time.
 136         connect(ui->gainstaging_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::gain_staging_knob_changed);
 137         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 138                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 139         });
 140         connect(ui->makeup_gain_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::final_makeup_gain_knob_changed);
 141         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 142                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 143         });
 144
 145         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 146         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 147         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 148                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 149         });
 150         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 151                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 152         });
 153         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 154         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 155
 156         struct sigaction act;
 157         act.sa_handler = schedule_cut_signal;
 158         act.sa_flags = SA_RESTART;
 159         sigaction(SIGHUP, &act, nullptr);
 160
 161         // Mostly for debugging. Don't override SIGINT, that's so evil if
 162         // shutdown isn't instant.
 163         act.sa_handler = quit_signal;
 164         act.sa_flags = SA_RESTART;
 165         sigaction(SIGUSR1, &act, nullptr);
 166 }
 167
 168 void MainWindow::mixer_shutting_down()
 169 {
 170         ui->me_live->clean_context();
 171         ui->me_preview->clean_context();
 172         for (Ui::Display *display : previews) {
 173                 display->display->clean_context();
 174         }
 175 }
 176
 177 void MainWindow::cut_triggered()
 178 {
 179         global_mixer->schedule_cut();
 180 }
 181
 182 void MainWindow::exit_triggered()
 183 {
 184         close();
 185 }
 186
 187 void MainWindow::about_triggered()
 188 {
 189         AboutDialog().exec();
 190 }
 191
 192 void MainWindow::gain_staging_knob_changed(int value)
 193 {
 194         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 195
 196         float gain_db = value * 0.1f;
 197         global_mixer->set_gain_staging_db(gain_db);
 198
 199         // The label will be updated by the audio level callback.
 200 }
 201
 202 void MainWindow::final_makeup_gain_knob_changed(int value)
 203 {
 204         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 205
 206         float gain_db = value * 0.1f;
 207         global_mixer->set_final_makeup_gain_db(gain_db);
 208
 209         // The label will be updated by the audio level callback.
 210 }
 211
 212 void MainWindow::cutoff_knob_changed(int value)
 213 {
 214         float octaves = value * 0.1f;
 215         float cutoff_hz = 20.0 * pow(2.0, octaves);
 216         global_mixer->set_locut_cutoff(cutoff_hz);
 217
 218         char buf[256];
 219         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 220         ui->locut_cutoff_display->setText(buf);
 221 }
 222
 223 void MainWindow::limiter_threshold_knob_changed(int value)
 224 {
 225         float threshold_dbfs = value * 0.1f;
 226         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 227
 228         char buf[256];
 229         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 230         ui->limiter_threshold_db_display->setText(buf);
 231 }
 232
 233 void MainWindow::compressor_threshold_knob_changed(int value)
 234 {
 235         float threshold_dbfs = value * 0.1f;
 236         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 237
 238         char buf[256];
 239         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 240         ui->compressor_threshold_db_display->setText(buf);
 241 }
 242
 243 void MainWindow::reset_meters_button_clicked()
 244 {
 245         global_mixer->reset_meters();
 246         ui->peak_display->setText("-inf");
 247         ui->peak_display->setStyleSheet("");
 248 }
 249
 250 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 251                                       float range_low_lufs, float range_high_lufs,
 252                                       float gain_staging_db, float final_makeup_gain_db,
 253                                       float correlation)
 254 {
 255         timeval now;
 256         gettimeofday(&now, nullptr);
 257
 258         // The meters are somewhat inefficient to update. Only update them
 259         // every 100 ms or so (we get updates every 5–20 ms).
 260         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 261                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 262         if (last_update_age < 0.100) {
 263                 return;
 264         }
 265         last_audio_level_callback = now;
 266
 267         post_to_main_thread([=]() {
 268                 ui->vu_meter->set_level(level_lufs);
 269                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 270                 ui->correlation_meter->set_correlation(correlation);
 271
 272                 char buf[256];
 273                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 274                 ui->peak_display->setText(buf);
 275                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 276                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 277                 } else {
 278                         ui->peak_display->setStyleSheet("");
 279                 }
 280
 281                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 282                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 283                 ui->gainstaging_db_display->setText(buf);
 284
 285                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 286                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 287                 ui->makeup_gain_db_display->setText(buf);
 288         });
 289 }
 290
 291 void MainWindow::relayout()
 292 {
 293         int height = ui->vertical_layout->geometry().height();
 294
 295         double remaining_height = height;
 296
 297         // Allocate the height; the most important part is to keep the main displays
 298         // at 16:9 if at all possible.
 299         double me_width = ui->me_preview->width();
 300         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 301
 302         // TODO: Scale the widths when we need to do this.
 303         if (me_height / double(height) > 0.8) {
 304                 me_height = height * 0.8;
 305         }
 306         remaining_height -= me_height + ui->vertical_layout->spacing();
 307
 308         double audiostrip_height = ui->audiostrip->geometry().height();
 309         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 310
 311         // The previews will be constrained by the remaining height, and the width.
 312         double preview_label_height = previews[0]->title_bar->geometry().height() +
 313                 previews[0]->main_vertical_layout->spacing();
 314         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 315         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 316         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 317
 318         ui->vertical_layout->setStretch(0, lrintf(me_height));
 319         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 320         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 321         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 322
 323         // Set the widths for the previews.
 324         double preview_width = preview_height * 16.0 / 9.0;
 325         for (unsigned i = 0; i < previews.size(); ++i) {
 326                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 327         }
 328
 329         // The preview horizontal spacer.
 330         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 331         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 332 }
 333
 334 void MainWindow::set_transition_names(vector<string> transition_names)
 335 {
 336         if (transition_names.size() < 1 || transition_names[0].empty()) {
 337                 transition_btn1->setText(QString(""));
 338         } else {
 339                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 340                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 341         }
 342         if (transition_names.size() < 2 || transition_names[1].empty()) {
 343                 transition_btn2->setText(QString(""));
 344         } else {
 345                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 346                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 347         }
 348         if (transition_names.size() < 3 || transition_names[2].empty()) {
 349                 transition_btn3->setText(QString(""));
 350         } else {
 351                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 352                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 353         }
 354 }
 355
 356 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 357 {
 358         if (output >= Mixer::OUTPUT_INPUT0) {
 359                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 360                 previews[channel]->label->setText(name.c_str());
 361         }
 362 }
 363
 364 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 365 {
 366         if (output >= Mixer::OUTPUT_INPUT0) {
 367                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 368                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 369         }
 370 }
 371
 372 void MainWindow::transition_clicked(int transition_number)
 373 {
 374         global_mixer->transition_clicked(transition_number);
 375 }
 376
 377 void MainWindow::channel_clicked(int channel_number)
 378 {
 379         if (current_wb_pick_display == channel_number) {
 380                 // The picking was already done from eventFilter(), since we don't get
 381                 // the mouse pointer here.
 382         } else {
 383                 global_mixer->channel_clicked(channel_number);
 384         }
 385 }
 386
 387 void MainWindow::wb_button_clicked(int channel_number)
 388 {
 389         current_wb_pick_display = channel_number;
 390         QApplication::setOverrideCursor(Qt::CrossCursor);
 391 }
 392
 393 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 394 {
 395         if (current_wb_pick_display != -1 &&
 396             event->type() == QEvent::MouseButtonRelease &&
 397             watched->isWidgetType()) {
 398                 QApplication::restoreOverrideCursor();
 399                 if (watched == previews[current_wb_pick_display]->display) {
 400                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 401                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 402                 } else {
 403                         // The user clicked on something else, give up.
 404                         // (The click goes through, which might not be ideal, but, yes.)
 405                         current_wb_pick_display = -1;
 406                 }
 407         }
 408         return false;
 409 }
 410
 411 namespace {
 412
 413 double srgb_to_linear(double x)
 414 {
 415         if (x < 0.04045) {
 416                 return x / 12.92;
 417         } else {
 418                 return pow((x + 0.055) / 1.055, 2.4);
 419         }
 420 }
 421
 422 }  // namespace
 423
 424 void MainWindow::set_white_balance(int channel_number, int x, int y)
 425 {
 426         // Set the white balance to neutral for the grab. It's probably going to
 427         // flicker a bit, but hopefully this display is not live anyway.
 428         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 429         previews[channel_number]->display->updateGL();
 430         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 431
 432         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 433         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 434         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 435         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 436         previews[channel_number]->display->updateGL();
 437 }