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_live, &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         // TODO: Fetch all of the values these for completeness,
 124         // not just the enable knobs implied by --flat-audio.
 125         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 126         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 127         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 128         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 129
 130         char buf[256];
 131         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 132         ui->limiter_threshold_db_display->setText(buf);
 133         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 134         ui->compressor_threshold_db_display->setText(buf);
 135
 136         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 137         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 138         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 139                 global_mixer->set_locut_enabled(state == Qt::Checked);
 140         });
 141
 142         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 143         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 144                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 145         });
 146         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 147         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 148                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 149         });
 150
 151         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 152         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 153         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 154                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 155         });
 156         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 157                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 158         });
 159         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 160         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 161
 162         struct sigaction act;
 163         memset(&act, 0, sizeof(act));
 164         act.sa_handler = schedule_cut_signal;
 165         act.sa_flags = SA_RESTART;
 166         sigaction(SIGHUP, &act, nullptr);
 167
 168         // Mostly for debugging. Don't override SIGINT, that's so evil if
 169         // shutdown isn't instant.
 170         memset(&act, 0, sizeof(act));
 171         act.sa_handler = quit_signal;
 172         act.sa_flags = SA_RESTART;
 173         sigaction(SIGUSR1, &act, nullptr);
 174 }
 175
 176 void MainWindow::mixer_shutting_down()
 177 {
 178         ui->me_live->clean_context();
 179         ui->me_preview->clean_context();
 180         for (Ui::Display *display : previews) {
 181                 display->display->clean_context();
 182         }
 183 }
 184
 185 void MainWindow::cut_triggered()
 186 {
 187         global_mixer->schedule_cut();
 188 }
 189
 190 void MainWindow::exit_triggered()
 191 {
 192         close();
 193 }
 194
 195 void MainWindow::about_triggered()
 196 {
 197         AboutDialog().exec();
 198 }
 199
 200 void MainWindow::gain_staging_knob_changed(int value)
 201 {
 202         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 203
 204         float gain_db = value * 0.1f;
 205         global_mixer->set_gain_staging_db(gain_db);
 206
 207         // The label will be updated by the audio level callback.
 208 }
 209
 210 void MainWindow::final_makeup_gain_knob_changed(int value)
 211 {
 212         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 213
 214         float gain_db = value * 0.1f;
 215         global_mixer->set_final_makeup_gain_db(gain_db);
 216
 217         // The label will be updated by the audio level callback.
 218 }
 219
 220 void MainWindow::cutoff_knob_changed(int value)
 221 {
 222         float octaves = value * 0.1f;
 223         float cutoff_hz = 20.0 * pow(2.0, octaves);
 224         global_mixer->set_locut_cutoff(cutoff_hz);
 225
 226         char buf[256];
 227         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 228         ui->locut_cutoff_display->setText(buf);
 229 }
 230
 231 void MainWindow::limiter_threshold_knob_changed(int value)
 232 {
 233         float threshold_dbfs = value * 0.1f;
 234         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 235
 236         char buf[256];
 237         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 238         ui->limiter_threshold_db_display->setText(buf);
 239 }
 240
 241 void MainWindow::compressor_threshold_knob_changed(int value)
 242 {
 243         float threshold_dbfs = value * 0.1f;
 244         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 245
 246         char buf[256];
 247         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 248         ui->compressor_threshold_db_display->setText(buf);
 249 }
 250
 251 void MainWindow::reset_meters_button_clicked()
 252 {
 253         global_mixer->reset_meters();
 254         ui->peak_display->setText("-inf");
 255         ui->peak_display->setStyleSheet("");
 256 }
 257
 258 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 259                                       float range_low_lufs, float range_high_lufs,
 260                                       float gain_staging_db, float final_makeup_gain_db,
 261                                       float correlation)
 262 {
 263         timeval now;
 264         gettimeofday(&now, nullptr);
 265
 266         // The meters are somewhat inefficient to update. Only update them
 267         // every 100 ms or so (we get updates every 5–20 ms).
 268         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 269                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 270         if (last_update_age < 0.100) {
 271                 return;
 272         }
 273         last_audio_level_callback = now;
 274
 275         post_to_main_thread([=]() {
 276                 ui->vu_meter->set_level(level_lufs);
 277                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 278                 ui->correlation_meter->set_correlation(correlation);
 279
 280                 char buf[256];
 281                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 282                 ui->peak_display->setText(buf);
 283                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 284                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 285                 } else {
 286                         ui->peak_display->setStyleSheet("");
 287                 }
 288
 289                 ui->gainstaging_knob->blockSignals(true);
 290                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 291                 ui->gainstaging_knob->blockSignals(false);
 292                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 293                 ui->gainstaging_db_display->setText(buf);
 294
 295                 ui->makeup_gain_knob->blockSignals(true);
 296                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 297                 ui->makeup_gain_knob->blockSignals(false);
 298                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 299                 ui->makeup_gain_db_display->setText(buf);
 300         });
 301 }
 302
 303 void MainWindow::relayout()
 304 {
 305         int height = ui->vertical_layout->geometry().height();
 306
 307         double remaining_height = height;
 308
 309         // Allocate the height; the most important part is to keep the main displays
 310         // at 16:9 if at all possible.
 311         double me_width = ui->me_preview->width();
 312         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 313
 314         // TODO: Scale the widths when we need to do this.
 315         if (me_height / double(height) > 0.8) {
 316                 me_height = height * 0.8;
 317         }
 318         remaining_height -= me_height + ui->vertical_layout->spacing();
 319
 320         double audiostrip_height = ui->audiostrip->geometry().height();
 321         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 322
 323         // The previews will be constrained by the remaining height, and the width.
 324         double preview_label_height = previews[0]->title_bar->geometry().height() +
 325                 previews[0]->main_vertical_layout->spacing();
 326         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 327         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 328         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 329
 330         ui->vertical_layout->setStretch(0, lrintf(me_height));
 331         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 332         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 333         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 334
 335         // Set the widths for the previews.
 336         double preview_width = preview_height * 16.0 / 9.0;
 337         for (unsigned i = 0; i < previews.size(); ++i) {
 338                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 339         }
 340
 341         // The preview horizontal spacer.
 342         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 343         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 344 }
 345
 346 void MainWindow::set_transition_names(vector<string> transition_names)
 347 {
 348         if (transition_names.size() < 1 || transition_names[0].empty()) {
 349                 transition_btn1->setText(QString(""));
 350         } else {
 351                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 352                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 353         }
 354         if (transition_names.size() < 2 || transition_names[1].empty()) {
 355                 transition_btn2->setText(QString(""));
 356         } else {
 357                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 358                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 359         }
 360         if (transition_names.size() < 3 || transition_names[2].empty()) {
 361                 transition_btn3->setText(QString(""));
 362         } else {
 363                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 364                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 365         }
 366 }
 367
 368 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 369 {
 370         if (output >= Mixer::OUTPUT_INPUT0) {
 371                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 372                 previews[channel]->label->setText(name.c_str());
 373         }
 374 }
 375
 376 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 377 {
 378         if (output >= Mixer::OUTPUT_INPUT0) {
 379                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 380                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 381         }
 382 }
 383
 384 void MainWindow::transition_clicked(int transition_number)
 385 {
 386         global_mixer->transition_clicked(transition_number);
 387 }
 388
 389 void MainWindow::channel_clicked(int channel_number)
 390 {
 391         if (current_wb_pick_display == channel_number) {
 392                 // The picking was already done from eventFilter(), since we don't get
 393                 // the mouse pointer here.
 394         } else {
 395                 global_mixer->channel_clicked(channel_number);
 396         }
 397 }
 398
 399 void MainWindow::wb_button_clicked(int channel_number)
 400 {
 401         current_wb_pick_display = channel_number;
 402         QApplication::setOverrideCursor(Qt::CrossCursor);
 403 }
 404
 405 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 406 {
 407         if (current_wb_pick_display != -1 &&
 408             event->type() == QEvent::MouseButtonRelease &&
 409             watched->isWidgetType()) {
 410                 QApplication::restoreOverrideCursor();
 411                 if (watched == previews[current_wb_pick_display]->display) {
 412                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 413                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 414                 } else {
 415                         // The user clicked on something else, give up.
 416                         // (The click goes through, which might not be ideal, but, yes.)
 417                         current_wb_pick_display = -1;
 418                 }
 419         }
 420         return false;
 421 }
 422
 423 namespace {
 424
 425 double srgb_to_linear(double x)
 426 {
 427         if (x < 0.04045) {
 428                 return x / 12.92;
 429         } else {
 430                 return pow((x + 0.055) / 1.055, 2.4);
 431         }
 432 }
 433
 434 }  // namespace
 435
 436 void MainWindow::set_white_balance(int channel_number, int x, int y)
 437 {
 438         // Set the white balance to neutral for the grab. It's probably going to
 439         // flicker a bit, but hopefully this display is not live anyway.
 440         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 441         previews[channel_number]->display->updateGL();
 442         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 443
 444         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 445         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 446         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 447         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 448         previews[channel_number]->display->updateGL();
 449 }