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 <QInputDialog>
  11 #include <QKeySequence>
  12 #include <QLabel>
  13 #include <QMetaType>
  14 #include <QPushButton>
  15 #include <QResizeEvent>
  16 #include <QShortcut>
  17 #include <QSize>
  18 #include <QString>
  19
  20 #include "aboutdialog.h"
  21 #include "flags.h"
  22 #include "glwidget.h"
  23 #include "lrameter.h"
  24 #include "mixer.h"
  25 #include "post_to_main_thread.h"
  26 #include "ui_display.h"
  27 #include "ui_mainwindow.h"
  28 #include "vumeter.h"
  29
  30 class QResizeEvent;
  31
  32 using namespace std;
  33 using namespace std::placeholders;
  34
  35 Q_DECLARE_METATYPE(std::string);
  36 Q_DECLARE_METATYPE(std::vector<std::string>);
  37
  38 MainWindow *global_mainwindow = nullptr;
  39
  40 namespace {
  41
  42 void schedule_cut_signal(int ignored)
  43 {
  44         global_mixer->schedule_cut();
  45 }
  46
  47 void quit_signal(int ignored)
  48 {
  49         global_mainwindow->close();
  50 }
  51
  52 }  // namespace
  53
  54 MainWindow::MainWindow()
  55         : ui(new Ui::MainWindow)
  56 {
  57         global_mainwindow = this;
  58         ui->setupUi(this);
  59
  60         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  61         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  62
  63         // The menus.
  64         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
  65         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  66         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  67
  68         if (global_flags.x264_video_to_http) {
  69                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
  70         } else {
  71                 ui->x264_bitrate_action->setEnabled(false);
  72         }
  73
  74         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
  75         // TODO: Make them dynamic.
  76         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
  77         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
  78         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
  79
  80         // Aiee...
  81         transition_btn1 = ui->transition_btn1;
  82         transition_btn2 = ui->transition_btn2;
  83         transition_btn3 = ui->transition_btn3;
  84         qRegisterMetaType<string>("std::string");
  85         qRegisterMetaType<vector<string>>("std::vector<std::string>");
  86         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  87         qRegisterMetaType<Mixer::Output>("Mixer::Output");
  88 }
  89
  90 void MainWindow::resizeEvent(QResizeEvent* event)
  91 {
  92         QMainWindow::resizeEvent(event);
  93
  94         // Ask for a relayout, but only after the event loop is done doing relayout
  95         // on everything else.
  96         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  97 }
  98
  99 void MainWindow::mixer_created(Mixer *mixer)
 100 {
 101         // Make the previews.
 102         unsigned num_previews = mixer->get_num_channels();
 103
 104         for (unsigned i = 0; i < num_previews; ++i) {
 105                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 106
 107                 QWidget *preview = new QWidget(this);
 108                 Ui::Display *ui_display = new Ui::Display;
 109                 ui_display->setupUi(preview);
 110                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 111                 ui_display->display->set_output(output);
 112                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 113                 previews.push_back(ui_display);
 114
 115                 // Hook up the click.
 116                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 117
 118                 // Let the theme update the text whenever the resolution or color changed.
 119                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 120                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 121
 122                 // Hook up the keyboard key.
 123                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 124                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 125
 126                 // Hook up the white balance button (irrelevant if invisible).
 127                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 128                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 129         }
 130
 131         // TODO: Fetch all of the values these for completeness,
 132         // not just the enable knobs implied by flags.
 133         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 134         ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
 135         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 136         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 137         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 138         ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
 139
 140         char buf[256];
 141         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 142         ui->limiter_threshold_db_display->setText(buf);
 143         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 144         ui->compressor_threshold_db_display->setText(buf);
 145
 146         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 147         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 148         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 149                 global_mixer->set_locut_enabled(state == Qt::Checked);
 150         });
 151
 152         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 153         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 154                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 155         });
 156         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 157         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 158                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 159         });
 160
 161         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 162         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 163         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 164                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 165         });
 166         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 167                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 168         });
 169         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 170         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 171
 172         struct sigaction act;
 173         memset(&act, 0, sizeof(act));
 174         act.sa_handler = schedule_cut_signal;
 175         act.sa_flags = SA_RESTART;
 176         sigaction(SIGHUP, &act, nullptr);
 177
 178         // Mostly for debugging. Don't override SIGINT, that's so evil if
 179         // shutdown isn't instant.
 180         memset(&act, 0, sizeof(act));
 181         act.sa_handler = quit_signal;
 182         act.sa_flags = SA_RESTART;
 183         sigaction(SIGUSR1, &act, nullptr);
 184 }
 185
 186 void MainWindow::mixer_shutting_down()
 187 {
 188         ui->me_live->clean_context();
 189         ui->me_preview->clean_context();
 190         for (Ui::Display *display : previews) {
 191                 display->display->clean_context();
 192         }
 193 }
 194
 195 void MainWindow::cut_triggered()
 196 {
 197         global_mixer->schedule_cut();
 198 }
 199
 200 void MainWindow::x264_bitrate_triggered()
 201 {
 202         bool ok;
 203         int new_bitrate = QInputDialog::getInt(this, "Change x264 bitrate", "Choose new bitrate for x264 HTTP output (from 100–100,000 kbit/sec):", global_flags.x264_bitrate, /*min=*/100, /*max=*/100000, /*step=*/100, &ok);
 204         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 205                 global_flags.x264_bitrate = new_bitrate;
 206                 global_mixer->change_x264_bitrate(new_bitrate);
 207         }
 208 }
 209
 210 void MainWindow::exit_triggered()
 211 {
 212         close();
 213 }
 214
 215 void MainWindow::about_triggered()
 216 {
 217         AboutDialog().exec();
 218 }
 219
 220 void MainWindow::gain_staging_knob_changed(int value)
 221 {
 222         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 223
 224         float gain_db = value * 0.1f;
 225         global_mixer->set_gain_staging_db(gain_db);
 226
 227         // The label will be updated by the audio level callback.
 228 }
 229
 230 void MainWindow::final_makeup_gain_knob_changed(int value)
 231 {
 232         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 233
 234         float gain_db = value * 0.1f;
 235         global_mixer->set_final_makeup_gain_db(gain_db);
 236
 237         // The label will be updated by the audio level callback.
 238 }
 239
 240 void MainWindow::cutoff_knob_changed(int value)
 241 {
 242         float octaves = value * 0.1f;
 243         float cutoff_hz = 20.0 * pow(2.0, octaves);
 244         global_mixer->set_locut_cutoff(cutoff_hz);
 245
 246         char buf[256];
 247         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 248         ui->locut_cutoff_display->setText(buf);
 249 }
 250
 251 void MainWindow::limiter_threshold_knob_changed(int value)
 252 {
 253         float threshold_dbfs = value * 0.1f;
 254         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 255
 256         char buf[256];
 257         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 258         ui->limiter_threshold_db_display->setText(buf);
 259 }
 260
 261 void MainWindow::compressor_threshold_knob_changed(int value)
 262 {
 263         float threshold_dbfs = value * 0.1f;
 264         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 265
 266         char buf[256];
 267         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 268         ui->compressor_threshold_db_display->setText(buf);
 269 }
 270
 271 void MainWindow::reset_meters_button_clicked()
 272 {
 273         global_mixer->reset_meters();
 274         ui->peak_display->setText("-inf");
 275         ui->peak_display->setStyleSheet("");
 276 }
 277
 278 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 279                                       float range_low_lufs, float range_high_lufs,
 280                                       float gain_staging_db, float final_makeup_gain_db,
 281                                       float correlation)
 282 {
 283         timeval now;
 284         gettimeofday(&now, nullptr);
 285
 286         // The meters are somewhat inefficient to update. Only update them
 287         // every 100 ms or so (we get updates every 5–20 ms).
 288         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 289                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 290         if (last_update_age < 0.100) {
 291                 return;
 292         }
 293         last_audio_level_callback = now;
 294
 295         post_to_main_thread([=]() {
 296                 ui->vu_meter->set_level(level_lufs);
 297                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 298                 ui->correlation_meter->set_correlation(correlation);
 299
 300                 char buf[256];
 301                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 302                 ui->peak_display->setText(buf);
 303                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 304                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 305                 } else {
 306                         ui->peak_display->setStyleSheet("");
 307                 }
 308
 309                 ui->gainstaging_knob->blockSignals(true);
 310                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 311                 ui->gainstaging_knob->blockSignals(false);
 312                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 313                 ui->gainstaging_db_display->setText(buf);
 314
 315                 ui->makeup_gain_knob->blockSignals(true);
 316                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 317                 ui->makeup_gain_knob->blockSignals(false);
 318                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 319                 ui->makeup_gain_db_display->setText(buf);
 320         });
 321 }
 322
 323 void MainWindow::relayout()
 324 {
 325         int height = ui->vertical_layout->geometry().height();
 326
 327         double remaining_height = height;
 328
 329         // Allocate the height; the most important part is to keep the main displays
 330         // at 16:9 if at all possible.
 331         double me_width = ui->me_preview->width();
 332         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 333
 334         // TODO: Scale the widths when we need to do this.
 335         if (me_height / double(height) > 0.8) {
 336                 me_height = height * 0.8;
 337         }
 338         remaining_height -= me_height + ui->vertical_layout->spacing();
 339
 340         double audiostrip_height = ui->audiostrip->geometry().height();
 341         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 342
 343         // The previews will be constrained by the remaining height, and the width.
 344         double preview_label_height = previews[0]->title_bar->geometry().height() +
 345                 previews[0]->main_vertical_layout->spacing();
 346         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 347         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 348         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 349
 350         ui->vertical_layout->setStretch(0, lrintf(me_height));
 351         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 352         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 353         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 354
 355         // Set the widths for the previews.
 356         double preview_width = preview_height * 16.0 / 9.0;
 357         for (unsigned i = 0; i < previews.size(); ++i) {
 358                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 359         }
 360
 361         // The preview horizontal spacer.
 362         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 363         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 364 }
 365
 366 void MainWindow::set_transition_names(vector<string> transition_names)
 367 {
 368         if (transition_names.size() < 1 || transition_names[0].empty()) {
 369                 transition_btn1->setText(QString(""));
 370         } else {
 371                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 372                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 373         }
 374         if (transition_names.size() < 2 || transition_names[1].empty()) {
 375                 transition_btn2->setText(QString(""));
 376         } else {
 377                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 378                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 379         }
 380         if (transition_names.size() < 3 || transition_names[2].empty()) {
 381                 transition_btn3->setText(QString(""));
 382         } else {
 383                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 384                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 385         }
 386 }
 387
 388 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 389 {
 390         if (output >= Mixer::OUTPUT_INPUT0) {
 391                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 392                 previews[channel]->label->setText(name.c_str());
 393         }
 394 }
 395
 396 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 397 {
 398         if (output >= Mixer::OUTPUT_INPUT0) {
 399                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 400                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 401         }
 402 }
 403
 404 void MainWindow::transition_clicked(int transition_number)
 405 {
 406         global_mixer->transition_clicked(transition_number);
 407 }
 408
 409 void MainWindow::channel_clicked(int channel_number)
 410 {
 411         if (current_wb_pick_display == channel_number) {
 412                 // The picking was already done from eventFilter(), since we don't get
 413                 // the mouse pointer here.
 414         } else {
 415                 global_mixer->channel_clicked(channel_number);
 416         }
 417 }
 418
 419 void MainWindow::wb_button_clicked(int channel_number)
 420 {
 421         current_wb_pick_display = channel_number;
 422         QApplication::setOverrideCursor(Qt::CrossCursor);
 423 }
 424
 425 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 426 {
 427         if (current_wb_pick_display != -1 &&
 428             event->type() == QEvent::MouseButtonRelease &&
 429             watched->isWidgetType()) {
 430                 QApplication::restoreOverrideCursor();
 431                 if (watched == previews[current_wb_pick_display]->display) {
 432                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 433                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 434                 } else {
 435                         // The user clicked on something else, give up.
 436                         // (The click goes through, which might not be ideal, but, yes.)
 437                         current_wb_pick_display = -1;
 438                 }
 439         }
 440         return false;
 441 }
 442
 443 namespace {
 444
 445 double srgb_to_linear(double x)
 446 {
 447         if (x < 0.04045) {
 448                 return x / 12.92;
 449         } else {
 450                 return pow((x + 0.055) / 1.055, 2.4);
 451         }
 452 }
 453
 454 }  // namespace
 455
 456 void MainWindow::set_white_balance(int channel_number, int x, int y)
 457 {
 458         // Set the white balance to neutral for the grab. It's probably going to
 459         // flicker a bit, but hopefully this display is not live anyway.
 460         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 461         previews[channel_number]->display->updateGL();
 462         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 463
 464         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 465         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 466         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 467         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 468         previews[channel_number]->display->updateGL();
 469 }