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 "disk_space_estimator.h"
  23 #include "flags.h"
  24 #include "glwidget.h"
  25 #include "lrameter.h"
  26 #include "mixer.h"
  27 #include "post_to_main_thread.h"
  28 #include "ui_display.h"
  29 #include "ui_mainwindow.h"
  30 #include "vumeter.h"
  31
  32 class QResizeEvent;
  33
  34 using namespace std;
  35 using namespace std::chrono;
  36 using namespace std::placeholders;
  37
  38 Q_DECLARE_METATYPE(std::string);
  39 Q_DECLARE_METATYPE(std::vector<std::string>);
  40
  41 MainWindow *global_mainwindow = nullptr;
  42
  43 namespace {
  44
  45 void schedule_cut_signal(int ignored)
  46 {
  47         global_mixer->schedule_cut();
  48 }
  49
  50 void quit_signal(int ignored)
  51 {
  52         global_mainwindow->close();
  53 }
  54
  55 constexpr unsigned DB_NO_FLAGS = 0x0;
  56 constexpr unsigned DB_WITH_SIGN = 0x1;
  57 constexpr unsigned DB_BARE = 0x2;
  58
  59 string format_db(double db, unsigned flags)
  60 {
  61         string text;
  62         if (flags & DB_WITH_SIGN) {
  63                 if (isfinite(db)) {
  64                         char buf[256];
  65                         snprintf(buf, sizeof(buf), "%+.1f", db);
  66                         text = buf;
  67                 } else if (db < 0.0) {
  68                         text = "-∞";
  69                 } else {
  70                         // Should never happen, really.
  71                         text = "+∞";
  72                 }
  73         } else {
  74                 if (isfinite(db)) {
  75                         char buf[256];
  76                         snprintf(buf, sizeof(buf), "%.1f", db);
  77                         text = buf;
  78                 } else if (db < 0.0) {
  79                         text = "-∞";
  80                 } else {
  81                         // Should never happen, really.
  82                         text = "∞";
  83                 }
  84         }
  85         if (!(flags & DB_BARE)) {
  86                 text += " dB";
  87         }
  88         return text;
  89 }
  90
  91 }  // namespace
  92
  93 MainWindow::MainWindow()
  94         : ui(new Ui::MainWindow)
  95 {
  96         global_mainwindow = this;
  97         ui->setupUi(this);
  98
  99         global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
 100         disk_free_label = new QLabel(this);
 101         disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
 102         ui->menuBar->setCornerWidget(disk_free_label);
 103
 104         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 105         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 106
 107         // The menus.
 108         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
 109         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
 110         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
 111
 112         if (global_flags.x264_video_to_http) {
 113                 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
 114         } else {
 115                 ui->x264_bitrate_action->setEnabled(false);
 116         }
 117
 118         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 119         // TODO: Make them dynamic.
 120         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
 121         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
 122         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 123
 124         // Aiee...
 125         transition_btn1 = ui->transition_btn1;
 126         transition_btn2 = ui->transition_btn2;
 127         transition_btn3 = ui->transition_btn3;
 128         qRegisterMetaType<string>("std::string");
 129         qRegisterMetaType<vector<string>>("std::vector<std::string>");
 130         connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
 131         qRegisterMetaType<Mixer::Output>("Mixer::Output");
 132
 133         last_audio_level_callback = steady_clock::now() - seconds(1);
 134 }
 135
 136 void MainWindow::resizeEvent(QResizeEvent* event)
 137 {
 138         QMainWindow::resizeEvent(event);
 139
 140         // Ask for a relayout, but only after the event loop is done doing relayout
 141         // on everything else.
 142         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
 143 }
 144
 145 void MainWindow::mixer_created(Mixer *mixer)
 146 {
 147         // Make the previews.
 148         unsigned num_previews = mixer->get_num_channels();
 149
 150         for (unsigned i = 0; i < num_previews; ++i) {
 151                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
 152
 153                 QWidget *preview = new QWidget(this);
 154                 Ui::Display *ui_display = new Ui::Display;
 155                 ui_display->setupUi(preview);
 156                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
 157                 ui_display->display->set_output(output);
 158                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
 159                 previews.push_back(ui_display);
 160
 161                 // Hook up the click.
 162                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
 163
 164                 // Let the theme update the text whenever the resolution or color changed.
 165                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
 166                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 167
 168                 // Hook up the keyboard key.
 169                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
 170                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 171
 172                 // Hook up the white balance button (irrelevant if invisible).
 173                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 174                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 175         }
 176
 177         // TODO: Fetch all of the values these for completeness,
 178         // not just the enable knobs implied by flags.
 179         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 180         ui->gainstaging_knob->setValue(global_mixer->get_gain_staging_db());
 181         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 182         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 183         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 184         ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_final_makeup_gain_auto());
 185
 186         ui->limiter_threshold_db_display->setText(
 187                 QString::fromStdString(format_db(mixer->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
 188         ui->compressor_threshold_db_display->setText(
 189                 QString::fromStdString(format_db(mixer->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
 190
 191         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 192         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 193         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 194                 global_mixer->set_locut_enabled(state == Qt::Checked);
 195         });
 196
 197         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 198         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 199                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 200         });
 201         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 202         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 203                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 204         });
 205
 206         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 207         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 208         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 209                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 210         });
 211         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 212                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 213         });
 214         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 215         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 216
 217         struct sigaction act;
 218         memset(&act, 0, sizeof(act));
 219         act.sa_handler = schedule_cut_signal;
 220         act.sa_flags = SA_RESTART;
 221         sigaction(SIGHUP, &act, nullptr);
 222
 223         // Mostly for debugging. Don't override SIGINT, that's so evil if
 224         // shutdown isn't instant.
 225         memset(&act, 0, sizeof(act));
 226         act.sa_handler = quit_signal;
 227         act.sa_flags = SA_RESTART;
 228         sigaction(SIGUSR1, &act, nullptr);
 229 }
 230
 231 void MainWindow::mixer_shutting_down()
 232 {
 233         ui->me_live->clean_context();
 234         ui->me_preview->clean_context();
 235         for (Ui::Display *display : previews) {
 236                 display->display->clean_context();
 237         }
 238 }
 239
 240 void MainWindow::cut_triggered()
 241 {
 242         global_mixer->schedule_cut();
 243 }
 244
 245 void MainWindow::x264_bitrate_triggered()
 246 {
 247         bool ok;
 248         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);
 249         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 250                 global_flags.x264_bitrate = new_bitrate;
 251                 global_mixer->change_x264_bitrate(new_bitrate);
 252         }
 253 }
 254
 255 void MainWindow::exit_triggered()
 256 {
 257         close();
 258 }
 259
 260 void MainWindow::about_triggered()
 261 {
 262         AboutDialog().exec();
 263 }
 264
 265 void MainWindow::gain_staging_knob_changed(int value)
 266 {
 267         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 268
 269         float gain_db = value * 0.1f;
 270         global_mixer->set_gain_staging_db(gain_db);
 271
 272         // The label will be updated by the audio level callback.
 273 }
 274
 275 void MainWindow::final_makeup_gain_knob_changed(int value)
 276 {
 277         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 278
 279         float gain_db = value * 0.1f;
 280         global_mixer->set_final_makeup_gain_db(gain_db);
 281
 282         // The label will be updated by the audio level callback.
 283 }
 284
 285 void MainWindow::cutoff_knob_changed(int value)
 286 {
 287         float octaves = value * 0.1f;
 288         float cutoff_hz = 20.0 * pow(2.0, octaves);
 289         global_mixer->set_locut_cutoff(cutoff_hz);
 290
 291         char buf[256];
 292         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 293         ui->locut_cutoff_display->setText(buf);
 294 }
 295
 296 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
 297 {
 298         char time_str[256];
 299         if (estimated_seconds_left < 60.0) {
 300                 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
 301         } else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
 302                 int s = lrintf(estimated_seconds_left);
 303                 int m = s / 60;
 304                 s %= 60;
 305                 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
 306         } else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
 307                 int m = lrintf(estimated_seconds_left / 60.0);
 308                 snprintf(time_str, sizeof(time_str), "%dm", m);
 309         } else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
 310                 int m = lrintf(estimated_seconds_left / 60.0);
 311                 int h = m / 60;
 312                 m %= 60;
 313                 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
 314         } else {  // More than ten hours: Xh.
 315                 int h = lrintf(estimated_seconds_left / 3600.0);
 316                 snprintf(time_str, sizeof(time_str), "%dh", h);
 317         }
 318         char buf[256];
 319         snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
 320
 321         std::string label = buf;
 322
 323         post_to_main_thread([this, label]{
 324                 disk_free_label->setText(QString::fromStdString(label));
 325                 ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
 326         });
 327 }
 328
 329 void MainWindow::limiter_threshold_knob_changed(int value)
 330 {
 331         float threshold_dbfs = value * 0.1f;
 332         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 333         ui->limiter_threshold_db_display->setText(
 334                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 335 }
 336
 337 void MainWindow::compressor_threshold_knob_changed(int value)
 338 {
 339         float threshold_dbfs = value * 0.1f;
 340         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 341         ui->compressor_threshold_db_display->setText(
 342                 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
 343 }
 344
 345 void MainWindow::reset_meters_button_clicked()
 346 {
 347         global_mixer->reset_meters();
 348         ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
 349         ui->peak_display->setStyleSheet("");
 350 }
 351
 352 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 353                                       float range_low_lufs, float range_high_lufs,
 354                                       float gain_staging_db, float final_makeup_gain_db,
 355                                       float correlation)
 356 {
 357         steady_clock::time_point now = steady_clock::now();
 358
 359         // The meters are somewhat inefficient to update. Only update them
 360         // every 100 ms or so (we get updates every 5–20 ms).
 361         double last_update_age = duration<double>(now - last_audio_level_callback).count();
 362         if (last_update_age < 0.100) {
 363                 return;
 364         }
 365         last_audio_level_callback = now;
 366
 367         post_to_main_thread([=]() {
 368                 ui->vu_meter->set_level(level_lufs);
 369                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 370                 ui->correlation_meter->set_correlation(correlation);
 371
 372                 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 373                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 374                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 375                 } else {
 376                         ui->peak_display->setStyleSheet("");
 377                 }
 378
 379                 ui->gainstaging_knob->blockSignals(true);
 380                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 381                 ui->gainstaging_knob->blockSignals(false);
 382                 ui->gainstaging_db_display->setText(
 383                         QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
 384
 385                 ui->makeup_gain_knob->blockSignals(true);
 386                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 387                 ui->makeup_gain_knob->blockSignals(false);
 388                 ui->makeup_gain_db_display->setText(
 389                         QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 390         });
 391 }
 392
 393 void MainWindow::relayout()
 394 {
 395         int height = ui->vertical_layout->geometry().height();
 396
 397         double remaining_height = height;
 398
 399         // Allocate the height; the most important part is to keep the main displays
 400         // at 16:9 if at all possible.
 401         double me_width = ui->me_preview->width();
 402         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 403
 404         // TODO: Scale the widths when we need to do this.
 405         if (me_height / double(height) > 0.8) {
 406                 me_height = height * 0.8;
 407         }
 408         remaining_height -= me_height + ui->vertical_layout->spacing();
 409
 410         double audiostrip_height = ui->audiostrip->geometry().height();
 411         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 412
 413         // The previews will be constrained by the remaining height, and the width.
 414         double preview_label_height = previews[0]->title_bar->geometry().height() +
 415                 previews[0]->main_vertical_layout->spacing();
 416         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 417         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 418         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 419
 420         ui->vertical_layout->setStretch(0, lrintf(me_height));
 421         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 422         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 423         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 424
 425         // Set the widths for the previews.
 426         double preview_width = preview_height * 16.0 / 9.0;
 427         for (unsigned i = 0; i < previews.size(); ++i) {
 428                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 429         }
 430
 431         // The preview horizontal spacer.
 432         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 433         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 434 }
 435
 436 void MainWindow::set_transition_names(vector<string> transition_names)
 437 {
 438         if (transition_names.size() < 1 || transition_names[0].empty()) {
 439                 transition_btn1->setText(QString(""));
 440         } else {
 441                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 442                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 443         }
 444         if (transition_names.size() < 2 || transition_names[1].empty()) {
 445                 transition_btn2->setText(QString(""));
 446         } else {
 447                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 448                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 449         }
 450         if (transition_names.size() < 3 || transition_names[2].empty()) {
 451                 transition_btn3->setText(QString(""));
 452         } else {
 453                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 454                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 455         }
 456 }
 457
 458 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 459 {
 460         if (output >= Mixer::OUTPUT_INPUT0) {
 461                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 462                 previews[channel]->label->setText(name.c_str());
 463         }
 464 }
 465
 466 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 467 {
 468         if (output >= Mixer::OUTPUT_INPUT0) {
 469                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 470                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 471         }
 472 }
 473
 474 void MainWindow::transition_clicked(int transition_number)
 475 {
 476         global_mixer->transition_clicked(transition_number);
 477 }
 478
 479 void MainWindow::channel_clicked(int channel_number)
 480 {
 481         if (current_wb_pick_display == channel_number) {
 482                 // The picking was already done from eventFilter(), since we don't get
 483                 // the mouse pointer here.
 484         } else {
 485                 global_mixer->channel_clicked(channel_number);
 486         }
 487 }
 488
 489 void MainWindow::wb_button_clicked(int channel_number)
 490 {
 491         current_wb_pick_display = channel_number;
 492         QApplication::setOverrideCursor(Qt::CrossCursor);
 493 }
 494
 495 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 496 {
 497         if (current_wb_pick_display != -1 &&
 498             event->type() == QEvent::MouseButtonRelease &&
 499             watched->isWidgetType()) {
 500                 QApplication::restoreOverrideCursor();
 501                 if (watched == previews[current_wb_pick_display]->display) {
 502                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 503                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 504                 } else {
 505                         // The user clicked on something else, give up.
 506                         // (The click goes through, which might not be ideal, but, yes.)
 507                         current_wb_pick_display = -1;
 508                 }
 509         }
 510         return false;
 511 }
 512
 513 namespace {
 514
 515 double srgb_to_linear(double x)
 516 {
 517         if (x < 0.04045) {
 518                 return x / 12.92;
 519         } else {
 520                 return pow((x + 0.055) / 1.055, 2.4);
 521         }
 522 }
 523
 524 }  // namespace
 525
 526 void MainWindow::set_white_balance(int channel_number, int x, int y)
 527 {
 528         // Set the white balance to neutral for the grab. It's probably going to
 529         // flicker a bit, but hopefully this display is not live anyway.
 530         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 531         previews[channel_number]->display->updateGL();
 532         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 533
 534         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 535         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 536         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 537         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 538         previews[channel_number]->display->updateGL();
 539 }