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