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

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