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