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 string format_db_with_sign(double db)
  53 {
  54         if (isfinite(db)) {
  55                 char buf[256];
  56                 snprintf(buf, sizeof(buf), "%+.1f dB", db);
  57                 return buf;
  58         } else if (db < 0.0) {
  59                 return "-∞ dB";
  60         } else {
  61                 // Should never happen, really.
  62                 return "+∞ dB";
  63         }
  64 }
  65
  66 string format_db(double db)
  67 {
  68         if (isfinite(db)) {
  69                 char buf[256];
  70                 snprintf(buf, sizeof(buf), "%.1f dB", db);
  71                 return buf;
  72         } else if (db < 0.0) {
  73                 return "-∞ dB";
  74         } else {
  75                 // Should never happen, really.
  76                 return "+∞ dB";
  77         }
  78 }
  79
  80 }  // namespace
  81
  82 MainWindow::MainWindow()
  83         : ui(new Ui::MainWindow)
  84 {
  85         global_mainwindow = this;
  86         ui->setupUi(this);
  87
  88         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  89         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  90
  91         // The menus.
  92         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
  93         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  94         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
  95
  96         if (global_flags.x264_video_to_http) {
  97                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
  98         } else {
  99                 ui->x264_bitrate_action->setEnabled(false);
 100         }
 101
 102         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 103         // TODO: Make them dynamic.
 104         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 105         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 106         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 107
 108         // Aiee...
 109         transition_btn1 = ui->transition_btn1;
 110         transition_btn2 = ui->transition_btn2;
 111         transition_btn3 = ui->transition_btn3;
 112         qRegisterMetaType<string>("std::string");
 113         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 114         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 115         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 116 }
 117
 118 void MainWindow::resizeEvent(QResizeEvent* event)
 119 {
 120         QMainWindow::resizeEvent(event);
 121
 122         // Ask for a relayout, but only after the event loop is done doing relayout
 123         // on everything else.
 124         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 125 }
 126
 127 void MainWindow::mixer_created(Mixer *mixer)
 128 {
 129         // Make the previews.
 130         unsigned num_previews = mixer->get_num_channels();
 131
 132         for (unsigned i = 0; i < num_previews; ++i) {
 133                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 134
 135                 QWidget *preview = new QWidget(this);
 136                 Ui::Display *ui_display = new Ui::Display;
 137                 ui_display->setupUi(preview);
 138                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 139                 ui_display->display->set_output(output);
 140                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 141                 previews.push_back(ui_display);
 142
 143                 // Hook up the click.
 144                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 145
 146                 // Let the theme update the text whenever the resolution or color changed.
 147                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 148                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 149
 150                 // Hook up the keyboard key.
 151                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 152                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 153
 154                 // Hook up the white balance button (irrelevant if invisible).
 155                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 156                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 157         }
 158
 159         // TODO: Fetch all of the values these for completeness,
 160         // not just the enable knobs implied by flags.
 161         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 162         ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
 163         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 164         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 165         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 166         ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
 167
 168         ui->limiter_threshold_db_display->setText(
 169                 QString::fromStdString(format_db(mixer->get_limiter_threshold_dbfs())));
 170         ui->compressor_threshold_db_display->setText(
 171                 QString::fromStdString(format_db(mixer->get_compressor_threshold_dbfs())));
 172
 173         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 174         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 175         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 176                 global_mixer->set_locut_enabled(state == Qt::Checked);
 177         });
 178
 179         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 180         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 181                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 182         });
 183         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 184         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 185                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 186         });
 187
 188         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 189         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 190         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 191                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 192         });
 193         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 194                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 195         });
 196         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 197         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 198
 199         struct sigaction act;
 200         memset(&act, 0, sizeof(act));
 201         act.sa_handler = schedule_cut_signal;
 202         act.sa_flags = SA_RESTART;
 203         sigaction(SIGHUP, &act, nullptr);
 204
 205         // Mostly for debugging. Don't override SIGINT, that's so evil if
 206         // shutdown isn't instant.
 207         memset(&act, 0, sizeof(act));
 208         act.sa_handler = quit_signal;
 209         act.sa_flags = SA_RESTART;
 210         sigaction(SIGUSR1, &act, nullptr);
 211 }
 212
 213 void MainWindow::mixer_shutting_down()
 214 {
 215         ui->me_live->clean_context();
 216         ui->me_preview->clean_context();
 217         for (Ui::Display *display : previews) {
 218                 display->display->clean_context();
 219         }
 220 }
 221
 222 void MainWindow::cut_triggered()
 223 {
 224         global_mixer->schedule_cut();
 225 }
 226
 227 void MainWindow::x264_bitrate_triggered()
 228 {
 229         bool ok;
 230         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);
 231         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 232                 global_flags.x264_bitrate = new_bitrate;
 233                 global_mixer->change_x264_bitrate(new_bitrate);
 234         }
 235 }
 236
 237 void MainWindow::exit_triggered()
 238 {
 239         close();
 240 }
 241
 242 void MainWindow::about_triggered()
 243 {
 244         AboutDialog().exec();
 245 }
 246
 247 void MainWindow::gain_staging_knob_changed(int value)
 248 {
 249         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 250
 251         float gain_db = value * 0.1f;
 252         global_mixer->set_gain_staging_db(gain_db);
 253
 254         // The label will be updated by the audio level callback.
 255 }
 256
 257 void MainWindow::final_makeup_gain_knob_changed(int value)
 258 {
 259         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 260
 261         float gain_db = value * 0.1f;
 262         global_mixer->set_final_makeup_gain_db(gain_db);
 263
 264         // The label will be updated by the audio level callback.
 265 }
 266
 267 void MainWindow::cutoff_knob_changed(int value)
 268 {
 269         float octaves = value * 0.1f;
 270         float cutoff_hz = 20.0 * pow(2.0, octaves);
 271         global_mixer->set_locut_cutoff(cutoff_hz);
 272
 273         char buf[256];
 274         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 275         ui->locut_cutoff_display->setText(buf);
 276 }
 277
 278 void MainWindow::limiter_threshold_knob_changed(int value)
 279 {
 280         float threshold_dbfs = value * 0.1f;
 281         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 282         ui->limiter_threshold_db_display->setText(
 283                 QString::fromStdString(format_db(threshold_dbfs)));
 284 }
 285
 286 void MainWindow::compressor_threshold_knob_changed(int value)
 287 {
 288         float threshold_dbfs = value * 0.1f;
 289         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 290         ui->compressor_threshold_db_display->setText(
 291                 QString::fromStdString(format_db(threshold_dbfs)));
 292 }
 293
 294 void MainWindow::reset_meters_button_clicked()
 295 {
 296         global_mixer->reset_meters();
 297         ui->peak_display->setText("-inf");
 298         ui->peak_display->setStyleSheet("");
 299 }
 300
 301 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 302                                       float range_low_lufs, float range_high_lufs,
 303                                       float gain_staging_db, float final_makeup_gain_db,
 304                                       float correlation)
 305 {
 306         timeval now;
 307         gettimeofday(&now, nullptr);
 308
 309         // The meters are somewhat inefficient to update. Only update them
 310         // every 100 ms or so (we get updates every 5–20 ms).
 311         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 312                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 313         if (last_update_age < 0.100) {
 314                 return;
 315         }
 316         last_audio_level_callback = now;
 317
 318         post_to_main_thread([=]() {
 319                 ui->vu_meter->set_level(level_lufs);
 320                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 321                 ui->correlation_meter->set_correlation(correlation);
 322
 323                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db)));
 324                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 325                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 326                 } else {
 327                         ui->peak_display->setStyleSheet("");
 328                 }
 329
 330                 ui->gainstaging_knob->blockSignals(true);
 331                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 332                 ui->gainstaging_knob->blockSignals(false);
 333                 ui->gainstaging_db_display->setText(
 334                         QString::fromStdString(format_db_with_sign(gain_staging_db)));
 335
 336                 ui->makeup_gain_knob->blockSignals(true);
 337                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 338                 ui->makeup_gain_knob->blockSignals(false);
 339                 ui->makeup_gain_db_display->setText(
 340                         QString::fromStdString(format_db_with_sign(final_makeup_gain_db)));
 341         });
 342 }
 343
 344 void MainWindow::relayout()
 345 {
 346         int height = ui->vertical_layout->geometry().height();
 347
 348         double remaining_height = height;
 349
 350         // Allocate the height; the most important part is to keep the main displays
 351         // at 16:9 if at all possible.
 352         double me_width = ui->me_preview->width();
 353         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 354
 355         // TODO: Scale the widths when we need to do this.
 356         if (me_height / double(height) > 0.8) {
 357                 me_height = height * 0.8;
 358         }
 359         remaining_height -= me_height + ui->vertical_layout->spacing();
 360
 361         double audiostrip_height = ui->audiostrip->geometry().height();
 362         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 363
 364         // The previews will be constrained by the remaining height, and the width.
 365         double preview_label_height = previews[0]->title_bar->geometry().height() +
 366                 previews[0]->main_vertical_layout->spacing();
 367         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 368         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 369         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 370
 371         ui->vertical_layout->setStretch(0, lrintf(me_height));
 372         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 373         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 374         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 375
 376         // Set the widths for the previews.
 377         double preview_width = preview_height * 16.0 / 9.0;
 378         for (unsigned i = 0; i < previews.size(); ++i) {
 379                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 380         }
 381
 382         // The preview horizontal spacer.
 383         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 384         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 385 }
 386
 387 void MainWindow::set_transition_names(vector<string> transition_names)
 388 {
 389         if (transition_names.size() < 1 || transition_names[0].empty()) {
 390                 transition_btn1->setText(QString(""));
 391         } else {
 392                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 393                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 394         }
 395         if (transition_names.size() < 2 || transition_names[1].empty()) {
 396                 transition_btn2->setText(QString(""));
 397         } else {
 398                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 399                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 400         }
 401         if (transition_names.size() < 3 || transition_names[2].empty()) {
 402                 transition_btn3->setText(QString(""));
 403         } else {
 404                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 405                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 406         }
 407 }
 408
 409 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 410 {
 411         if (output >= Mixer::OUTPUT_INPUT0) {
 412                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 413                 previews[channel]->label->setText(name.c_str());
 414         }
 415 }
 416
 417 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 418 {
 419         if (output >= Mixer::OUTPUT_INPUT0) {
 420                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 421                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 422         }
 423 }
 424
 425 void MainWindow::transition_clicked(int transition_number)
 426 {
 427         global_mixer->transition_clicked(transition_number);
 428 }
 429
 430 void MainWindow::channel_clicked(int channel_number)
 431 {
 432         if (current_wb_pick_display == channel_number) {
 433                 // The picking was already done from eventFilter(), since we don't get
 434                 // the mouse pointer here.
 435         } else {
 436                 global_mixer->channel_clicked(channel_number);
 437         }
 438 }
 439
 440 void MainWindow::wb_button_clicked(int channel_number)
 441 {
 442         current_wb_pick_display = channel_number;
 443         QApplication::setOverrideCursor(Qt::CrossCursor);
 444 }
 445
 446 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 447 {
 448         if (current_wb_pick_display != -1 &&
 449             event->type() == QEvent::MouseButtonRelease &&
 450             watched->isWidgetType()) {
 451                 QApplication::restoreOverrideCursor();
 452                 if (watched == previews[current_wb_pick_display]->display) {
 453                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 454                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 455                 } else {
 456                         // The user clicked on something else, give up.
 457                         // (The click goes through, which might not be ideal, but, yes.)
 458                         current_wb_pick_display = -1;
 459                 }
 460         }
 461         return false;
 462 }
 463
 464 namespace {
 465
 466 double srgb_to_linear(double x)
 467 {
 468         if (x < 0.04045) {
 469                 return x / 12.92;
 470         } else {
 471                 return pow((x + 0.055) / 1.055, 2.4);
 472         }
 473 }
 474
 475 }  // namespace
 476
 477 void MainWindow::set_white_balance(int channel_number, int x, int y)
 478 {
 479         // Set the white balance to neutral for the grab. It's probably going to
 480         // flicker a bit, but hopefully this display is not live anyway.
 481         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 482         previews[channel_number]->display->updateGL();
 483         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 484
 485         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 486         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 487         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 488         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 489         previews[channel_number]->display->updateGL();
 490 }