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