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 <chrono>
   8 #include <string>
   9 #include <vector>
  10 #include <QBoxLayout>
  11 #include <QInputDialog>
  12 #include <QKeySequence>
  13 #include <QLabel>
  14 #include <QMetaType>
  15 #include <QPushButton>
  16 #include <QResizeEvent>
  17 #include <QShortcut>
  18 #include <QSize>
  19 #include <QString>
  20
  21 #include "aboutdialog.h"
  22 #include "flags.h"
  23 #include "glwidget.h"
  24 #include "lrameter.h"
  25 #include "mixer.h"
  26 #include "post_to_main_thread.h"
  27 #include "ui_display.h"
  28 #include "ui_mainwindow.h"
  29 #include "vumeter.h"
  30
  31 class QResizeEvent;
  32
  33 using namespace std;
  34 using namespace std::chrono;
  35 using namespace std::placeholders;
  36
  37 Q_DECLARE_METATYPE(std::string);
  38 Q_DECLARE_METATYPE(std::vector<std::string>);
  39
  40 MainWindow *global_mainwindow = nullptr;
  41
  42 namespace {
  43
  44 void schedule_cut_signal(int ignored)
  45 {
  46         global_mixer->schedule_cut();
  47 }
  48
  49 void quit_signal(int ignored)
  50 {
  51         global_mainwindow->close();
  52 }
  53
  54 constexpr unsigned DB_NO_FLAGS = 0x0;
  55 constexpr unsigned DB_WITH_SIGN = 0x1;
  56 constexpr unsigned DB_BARE = 0x2;
  57
  58 string format_db(double db, unsigned flags)
  59 {
  60         string text;
  61         if (flags & DB_WITH_SIGN) {
  62                 if (isfinite(db)) {
  63                         char buf[256];
  64                         snprintf(buf, sizeof(buf), "%+.1f", db);
  65                         text = buf;
  66                 } else if (db < 0.0) {
  67                         text = "-∞";
  68                 } else {
  69                         // Should never happen, really.
  70                         text = "+∞";
  71                 }
  72         } else {
  73                 if (isfinite(db)) {
  74                         char buf[256];
  75                         snprintf(buf, sizeof(buf), "%.1f", db);
  76                         text = buf;
  77                 } else if (db < 0.0) {
  78                         text = "-∞";
  79                 } else {
  80                         // Should never happen, really.
  81                         text = "∞";
  82                 }
  83         }
  84         if (!(flags & DB_BARE)) {
  85                 text += " dB";
  86         }
  87         return text;
  88 }
  89
  90 }  // namespace
  91
  92 MainWindow::MainWindow()
  93         : ui(new Ui::MainWindow)
  94 {
  95         global_mainwindow = this;
  96         ui->setupUi(this);
  97
  98         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  99         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 100
 101         // The menus.
 102         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 103         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 104         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 105
 106         if (global_flags.x264_video_to_http) {
 107                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 108         } else {
 109                 ui->x264_bitrate_action->setEnabled(false);
 110         }
 111
 112         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 113         // TODO: Make them dynamic.
 114         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 115         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 116         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 117
 118         // Aiee...
 119         transition_btn1 = ui->transition_btn1;
 120         transition_btn2 = ui->transition_btn2;
 121         transition_btn3 = ui->transition_btn3;
 122         qRegisterMetaType<string>("std::string");
 123         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 124         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 125         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 126
 127         last_audio_level_callback = steady_clock::now() - seconds(1);
 128 }
 129
 130 void MainWindow::resizeEvent(QResizeEvent* event)
 131 {
 132         QMainWindow::resizeEvent(event);
 133
 134         // Ask for a relayout, but only after the event loop is done doing relayout
 135         // on everything else.
 136         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 137 }
 138
 139 void MainWindow::mixer_created(Mixer *mixer)
 140 {
 141         // Make the previews.
 142         unsigned num_previews = mixer->get_num_channels();
 143
 144         for (unsigned i = 0; i < num_previews; ++i) {
 145                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 146
 147                 QWidget *preview = new QWidget(this);
 148                 Ui::Display *ui_display = new Ui::Display;
 149                 ui_display->setupUi(preview);
 150                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 151                 ui_display->display->set_output(output);
 152                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 153                 previews.push_back(ui_display);
 154
 155                 // Hook up the click.
 156                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 157
 158                 // Let the theme update the text whenever the resolution or color changed.
 159                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 160                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 161
 162                 // Hook up the keyboard key.
 163                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 164                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 165
 166                 // Hook up the white balance button (irrelevant if invisible).
 167                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 168                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 169         }
 170
 171         // TODO: Fetch all of the values these for completeness,
 172         // not just the enable knobs implied by flags.
 173         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 174         ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
 175         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 176         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 177         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 178         ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
 179
 180         ui->limiter_threshold_db_display->setText(
 181                 QString::fromStdString(format_db(mixer->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 182         ui->compressor_threshold_db_display->setText(
 183                 QString::fromStdString(format_db(mixer->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
 184
 185         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 186         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 187         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 188                 global_mixer->set_locut_enabled(state == Qt::Checked);
 189         });
 190
 191         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 192         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 193                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 194         });
 195         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 196         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 197                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 198         });
 199
 200         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 201         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 202         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 203                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 204         });
 205         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 206                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 207         });
 208         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 209         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 210
 211         struct sigaction act;
 212         memset(&act, 0, sizeof(act));
 213         act.sa_handler = schedule_cut_signal;
 214         act.sa_flags = SA_RESTART;
 215         sigaction(SIGHUP, &act, nullptr);
 216
 217         // Mostly for debugging. Don't override SIGINT, that's so evil if
 218         // shutdown isn't instant.
 219         memset(&act, 0, sizeof(act));
 220         act.sa_handler = quit_signal;
 221         act.sa_flags = SA_RESTART;
 222         sigaction(SIGUSR1, &act, nullptr);
 223 }
 224
 225 void MainWindow::mixer_shutting_down()
 226 {
 227         ui->me_live->clean_context();
 228         ui->me_preview->clean_context();
 229         for (Ui::Display *display : previews) {
 230                 display->display->clean_context();
 231         }
 232 }
 233
 234 void MainWindow::cut_triggered()
 235 {
 236         global_mixer->schedule_cut();
 237 }
 238
 239 void MainWindow::x264_bitrate_triggered()
 240 {
 241         bool ok;
 242         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);
 243         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 244                 global_flags.x264_bitrate = new_bitrate;
 245                 global_mixer->change_x264_bitrate(new_bitrate);
 246         }
 247 }
 248
 249 void MainWindow::exit_triggered()
 250 {
 251         close();
 252 }
 253
 254 void MainWindow::about_triggered()
 255 {
 256         AboutDialog().exec();
 257 }
 258
 259 void MainWindow::gain_staging_knob_changed(int value)
 260 {
 261         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 262
 263         float gain_db = value * 0.1f;
 264         global_mixer->set_gain_staging_db(gain_db);
 265
 266         // The label will be updated by the audio level callback.
 267 }
 268
 269 void MainWindow::final_makeup_gain_knob_changed(int value)
 270 {
 271         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 272
 273         float gain_db = value * 0.1f;
 274         global_mixer->set_final_makeup_gain_db(gain_db);
 275
 276         // The label will be updated by the audio level callback.
 277 }
 278
 279 void MainWindow::cutoff_knob_changed(int value)
 280 {
 281         float octaves = value * 0.1f;
 282         float cutoff_hz = 20.0 * pow(2.0, octaves);
 283         global_mixer->set_locut_cutoff(cutoff_hz);
 284
 285         char buf[256];
 286         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 287         ui->locut_cutoff_display->setText(buf);
 288 }
 289
 290 void MainWindow::limiter_threshold_knob_changed(int value)
 291 {
 292         float threshold_dbfs = value * 0.1f;
 293         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 294         ui->limiter_threshold_db_display->setText(
 295                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 296 }
 297
 298 void MainWindow::compressor_threshold_knob_changed(int value)
 299 {
 300         float threshold_dbfs = value * 0.1f;
 301         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 302         ui->compressor_threshold_db_display->setText(
 303                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 304 }
 305
 306 void MainWindow::reset_meters_button_clicked()
 307 {
 308         global_mixer->reset_meters();
 309         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 310         ui->peak_display->setStyleSheet("");
 311 }
 312
 313 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 314                                       float range_low_lufs, float range_high_lufs,
 315                                       float gain_staging_db, float final_makeup_gain_db,
 316                                       float correlation)
 317 {
 318         steady_clock::time_point now = steady_clock::now();
 319
 320         // The meters are somewhat inefficient to update. Only update them
 321         // every 100 ms or so (we get updates every 5–20 ms).
 322         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 323         if (last_update_age < 0.100) {
 324                 return;
 325         }
 326         last_audio_level_callback = now;
 327
 328         post_to_main_thread([=]() {
 329                 ui->vu_meter->set_level(level_lufs);
 330                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 331                 ui->correlation_meter->set_correlation(correlation);
 332
 333                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 334                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 335                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 336                 } else {
 337                         ui->peak_display->setStyleSheet("");
 338                 }
 339
 340                 ui->gainstaging_knob->blockSignals(true);
 341                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 342                 ui->gainstaging_knob->blockSignals(false);
 343                 ui->gainstaging_db_display->setText(
 344                         QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
 345
 346                 ui->makeup_gain_knob->blockSignals(true);
 347                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 348                 ui->makeup_gain_knob->blockSignals(false);
 349                 ui->makeup_gain_db_display->setText(
 350                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 351         });
 352 }
 353
 354 void MainWindow::relayout()
 355 {
 356         int height = ui->vertical_layout->geometry().height();
 357
 358         double remaining_height = height;
 359
 360         // Allocate the height; the most important part is to keep the main displays
 361         // at 16:9 if at all possible.
 362         double me_width = ui->me_preview->width();
 363         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 364
 365         // TODO: Scale the widths when we need to do this.
 366         if (me_height / double(height) > 0.8) {
 367                 me_height = height * 0.8;
 368         }
 369         remaining_height -= me_height + ui->vertical_layout->spacing();
 370
 371         double audiostrip_height = ui->audiostrip->geometry().height();
 372         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 373
 374         // The previews will be constrained by the remaining height, and the width.
 375         double preview_label_height = previews[0]->title_bar->geometry().height() +
 376                 previews[0]->main_vertical_layout->spacing();
 377         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 378         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 379         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 380
 381         ui->vertical_layout->setStretch(0, lrintf(me_height));
 382         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 383         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 384         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 385
 386         // Set the widths for the previews.
 387         double preview_width = preview_height * 16.0 / 9.0;
 388         for (unsigned i = 0; i < previews.size(); ++i) {
 389                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 390         }
 391
 392         // The preview horizontal spacer.
 393         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 394         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 395 }
 396
 397 void MainWindow::set_transition_names(vector<string> transition_names)
 398 {
 399         if (transition_names.size() < 1 || transition_names[0].empty()) {
 400                 transition_btn1->setText(QString(""));
 401         } else {
 402                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 403                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 404         }
 405         if (transition_names.size() < 2 || transition_names[1].empty()) {
 406                 transition_btn2->setText(QString(""));
 407         } else {
 408                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 409                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 410         }
 411         if (transition_names.size() < 3 || transition_names[2].empty()) {
 412                 transition_btn3->setText(QString(""));
 413         } else {
 414                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 415                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 416         }
 417 }
 418
 419 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 420 {
 421         if (output >= Mixer::OUTPUT_INPUT0) {
 422                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 423                 previews[channel]->label->setText(name.c_str());
 424         }
 425 }
 426
 427 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 428 {
 429         if (output >= Mixer::OUTPUT_INPUT0) {
 430                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 431                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 432         }
 433 }
 434
 435 void MainWindow::transition_clicked(int transition_number)
 436 {
 437         global_mixer->transition_clicked(transition_number);
 438 }
 439
 440 void MainWindow::channel_clicked(int channel_number)
 441 {
 442         if (current_wb_pick_display == channel_number) {
 443                 // The picking was already done from eventFilter(), since we don't get
 444                 // the mouse pointer here.
 445         } else {
 446                 global_mixer->channel_clicked(channel_number);
 447         }
 448 }
 449
 450 void MainWindow::wb_button_clicked(int channel_number)
 451 {
 452         current_wb_pick_display = channel_number;
 453         QApplication::setOverrideCursor(Qt::CrossCursor);
 454 }
 455
 456 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 457 {
 458         if (current_wb_pick_display != -1 &&
 459             event->type() == QEvent::MouseButtonRelease &&
 460             watched->isWidgetType()) {
 461                 QApplication::restoreOverrideCursor();
 462                 if (watched == previews[current_wb_pick_display]->display) {
 463                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 464                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 465                 } else {
 466                         // The user clicked on something else, give up.
 467                         // (The click goes through, which might not be ideal, but, yes.)
 468                         current_wb_pick_display = -1;
 469                 }
 470         }
 471         return false;
 472 }
 473
 474 namespace {
 475
 476 double srgb_to_linear(double x)
 477 {
 478         if (x < 0.04045) {
 479                 return x / 12.92;
 480         } else {
 481                 return pow((x + 0.055) / 1.055, 2.4);
 482         }
 483 }
 484
 485 }  // namespace
 486
 487 void MainWindow::set_white_balance(int channel_number, int x, int y)
 488 {
 489         // Set the white balance to neutral for the grab. It's probably going to
 490         // flicker a bit, but hopefully this display is not live anyway.
 491         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 492         previews[channel_number]->display->updateGL();
 493         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 494
 495         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 496         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 497         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 498         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 499         previews[channel_number]->display->updateGL();
 500 }