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
 114         // Not QDial::valueChanged, as we call setValue() all the time.
 115         connect(ui->gainstaging_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::gain_staging_knob_changed);
 116         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 117                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 118         });
 119         connect(ui->makeup_gain_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::final_makeup_gain_knob_changed);
 120         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 121                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 122         });
 123
 124         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 125         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 126         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 127                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 128         });
 129         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 130                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 131         });
 132         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 133         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 134 }
 135
 136 void MainWindow::mixer_shutting_down()
 137 {
 138         ui->me_live->clean_context();
 139         ui->me_preview->clean_context();
 140         for (Ui::Display *display : previews) {
 141                 display->display->clean_context();
 142         }
 143 }
 144
 145 void MainWindow::cut_triggered()
 146 {
 147         global_mixer->schedule_cut();
 148 }
 149
 150 void MainWindow::exit_triggered()
 151 {
 152         close();
 153 }
 154
 155 void MainWindow::about_triggered()
 156 {
 157         AboutDialog().exec();
 158 }
 159
 160 void MainWindow::gain_staging_knob_changed(int value)
 161 {
 162         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 163
 164         float gain_db = value * 0.1f;
 165         global_mixer->set_gain_staging_db(gain_db);
 166
 167         // The label will be updated by the audio level callback.
 168 }
 169
 170 void MainWindow::final_makeup_gain_knob_changed(int value)
 171 {
 172         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 173
 174         float gain_db = value * 0.1f;
 175         global_mixer->set_final_makeup_gain_db(gain_db);
 176
 177         // The label will be updated by the audio level callback.
 178 }
 179
 180 void MainWindow::cutoff_knob_changed(int value)
 181 {
 182         float octaves = value * 0.1f;
 183         float cutoff_hz = 20.0 * pow(2.0, octaves);
 184         global_mixer->set_locut_cutoff(cutoff_hz);
 185
 186         char buf[256];
 187         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 188         ui->locut_cutoff_display->setText(buf);
 189 }
 190
 191 void MainWindow::limiter_threshold_knob_changed(int value)
 192 {
 193         float threshold_dbfs = value * 0.1f;
 194         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 195
 196         char buf[256];
 197         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 198         ui->limiter_threshold_db_display->setText(buf);
 199 }
 200
 201 void MainWindow::compressor_threshold_knob_changed(int value)
 202 {
 203         float threshold_dbfs = value * 0.1f;
 204         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 205
 206         char buf[256];
 207         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 208         ui->compressor_threshold_db_display->setText(buf);
 209 }
 210
 211 void MainWindow::reset_meters_button_clicked()
 212 {
 213         global_mixer->reset_meters();
 214         ui->peak_display->setText("-inf");
 215         ui->peak_display->setStyleSheet("");
 216 }
 217
 218 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 219                                       float range_low_lufs, float range_high_lufs,
 220                                       float gain_staging_db, float final_makeup_gain_db,
 221                                       float correlation)
 222 {
 223         timeval now;
 224         gettimeofday(&now, nullptr);
 225
 226         // The meters are somewhat inefficient to update. Only update them
 227         // every 100 ms or so (we get updates every 5–20 ms).
 228         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 229                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 230         if (last_update_age < 0.100) {
 231                 return;
 232         }
 233         last_audio_level_callback = now;
 234
 235         post_to_main_thread([=]() {
 236                 ui->vu_meter->set_level(level_lufs);
 237                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 238                 ui->correlation_meter->set_correlation(correlation);
 239
 240                 char buf[256];
 241                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 242                 ui->peak_display->setText(buf);
 243                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 244                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 245                 } else {
 246                         ui->peak_display->setStyleSheet("");
 247                 }
 248
 249                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 250                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 251                 ui->gainstaging_db_display->setText(buf);
 252
 253                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 254                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 255                 ui->makeup_gain_db_display->setText(buf);
 256         });
 257 }
 258
 259 void MainWindow::relayout()
 260 {
 261         int height = ui->vertical_layout->geometry().height();
 262
 263         double remaining_height = height;
 264
 265         // Allocate the height; the most important part is to keep the main displays
 266         // at 16:9 if at all possible.
 267         double me_width = ui->me_preview->width();
 268         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 269
 270         // TODO: Scale the widths when we need to do this.
 271         if (me_height / double(height) > 0.8) {
 272                 me_height = height * 0.8;
 273         }
 274         remaining_height -= me_height + ui->vertical_layout->spacing();
 275
 276         double audiostrip_height = ui->audiostrip->geometry().height();
 277         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 278
 279         // The previews will be constrained by the remaining height, and the width.
 280         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 281         int preview_total_width = ui->preview_displays->geometry().width();
 282         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 283         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 284
 285         ui->vertical_layout->setStretch(0, lrintf(me_height));
 286         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 287         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 288         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 289
 290         // Set the widths for the previews.
 291         double preview_width = preview_height * 16.0 / 9.0;
 292         double remaining_preview_width = preview_total_width;
 293
 294         for (unsigned i = 0; i < previews.size(); ++i) {
 295                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 296                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 297         }
 298
 299         // The preview horizontal spacer.
 300         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 301 }
 302
 303 void MainWindow::set_transition_names(vector<string> transition_names)
 304 {
 305         if (transition_names.size() < 1) {
 306                 transition_btn1->setText(QString(""));
 307         } else {
 308                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 309         }
 310         if (transition_names.size() < 2) {
 311                 transition_btn2->setText(QString(""));
 312         } else {
 313                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 314         }
 315         if (transition_names.size() < 3) {
 316                 transition_btn3->setText(QString(""));
 317         } else {
 318                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 319         }
 320 }
 321
 322 void MainWindow::update_channel_name(Mixer::Output output)
 323 {
 324         if (output >= Mixer::OUTPUT_INPUT0) {
 325                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 326                 previews[channel]->label->setText(global_mixer->get_channel_name(output).c_str());
 327         }
 328 }
 329
 330 void MainWindow::transition_clicked(int transition_number)
 331 {
 332         global_mixer->transition_clicked(transition_number);
 333 }
 334
 335 void MainWindow::channel_clicked(int channel_number)
 336 {
 337         if (current_wb_pick_display == channel_number) {
 338                 // The picking was already done from eventFilter(), since we don't get
 339                 // the mouse pointer here.
 340         } else {
 341                 global_mixer->channel_clicked(channel_number);
 342         }
 343 }
 344
 345 void MainWindow::wb_button_clicked(int channel_number)
 346 {
 347         current_wb_pick_display = channel_number;
 348         QApplication::setOverrideCursor(Qt::CrossCursor);
 349 }
 350
 351 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 352 {
 353         if (current_wb_pick_display != -1 &&
 354             event->type() == QEvent::MouseButtonRelease &&
 355             watched->isWidgetType()) {
 356                 QApplication::restoreOverrideCursor();
 357                 if (watched == previews[current_wb_pick_display]->display) {
 358                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 359                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 360                 } else {
 361                         // The user clicked on something else, give up.
 362                         // (The click goes through, which might not be ideal, but, yes.)
 363                         current_wb_pick_display = -1;
 364                 }
 365         }
 366         return false;
 367 }
 368
 369 namespace {
 370
 371 double srgb_to_linear(double x)
 372 {
 373         if (x < 0.04045) {
 374                 return x / 12.92;
 375         } else {
 376                 return pow((x + 0.055) / 1.055, 2.4);
 377         }
 378 }
 379
 380 }  // namespace
 381
 382 void MainWindow::set_white_balance(int channel_number, int x, int y)
 383 {
 384         // Set the white balance to neutral for the grab. It's probably going to
 385         // flicker a bit, but hopefully this display is not live anyway.
 386         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 387         previews[channel_number]->display->updateGL();
 388         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 389
 390         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 391         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 392         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 393         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 394         previews[channel_number]->display->updateGL();
 395 }