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 --flat-audio.
 133         ui->locut_enabled->setChecked(global_mixer->get_locut_enabled());
 134         ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_gain_staging_auto());
 135         ui->limiter_enabled->setChecked(global_mixer->get_limiter_enabled());
 136         ui->compressor_enabled->setChecked(global_mixer->get_compressor_enabled());
 137
 138         char buf[256];
 139         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 140         ui->limiter_threshold_db_display->setText(buf);
 141         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 142         ui->compressor_threshold_db_display->setText(buf);
 143
 144         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 145         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 146         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
 147                 global_mixer->set_locut_enabled(state == Qt::Checked);
 148         });
 149
 150         connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
 151         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 152                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 153         });
 154         connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
 155         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 156                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
 157         });
 158
 159         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 160         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 161         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 162                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 163         });
 164         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 165                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 166         });
 167         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 168         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
 169
 170         struct sigaction act;
 171         memset(&act, 0, sizeof(act));
 172         act.sa_handler = schedule_cut_signal;
 173         act.sa_flags = SA_RESTART;
 174         sigaction(SIGHUP, &act, nullptr);
 175
 176         // Mostly for debugging. Don't override SIGINT, that's so evil if
 177         // shutdown isn't instant.
 178         memset(&act, 0, sizeof(act));
 179         act.sa_handler = quit_signal;
 180         act.sa_flags = SA_RESTART;
 181         sigaction(SIGUSR1, &act, nullptr);
 182 }
 183
 184 void MainWindow::mixer_shutting_down()
 185 {
 186         ui->me_live->clean_context();
 187         ui->me_preview->clean_context();
 188         for (Ui::Display *display : previews) {
 189                 display->display->clean_context();
 190         }
 191 }
 192
 193 void MainWindow::cut_triggered()
 194 {
 195         global_mixer->schedule_cut();
 196 }
 197
 198 void MainWindow::x264_bitrate_triggered()
 199 {
 200         bool ok;
 201         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);
 202         if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
 203                 global_flags.x264_bitrate = new_bitrate;
 204                 global_mixer->change_x264_bitrate(new_bitrate);
 205         }
 206 }
 207
 208 void MainWindow::exit_triggered()
 209 {
 210         close();
 211 }
 212
 213 void MainWindow::about_triggered()
 214 {
 215         AboutDialog().exec();
 216 }
 217
 218 void MainWindow::gain_staging_knob_changed(int value)
 219 {
 220         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 221
 222         float gain_db = value * 0.1f;
 223         global_mixer->set_gain_staging_db(gain_db);
 224
 225         // The label will be updated by the audio level callback.
 226 }
 227
 228 void MainWindow::final_makeup_gain_knob_changed(int value)
 229 {
 230         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
 231
 232         float gain_db = value * 0.1f;
 233         global_mixer->set_final_makeup_gain_db(gain_db);
 234
 235         // The label will be updated by the audio level callback.
 236 }
 237
 238 void MainWindow::cutoff_knob_changed(int value)
 239 {
 240         float octaves = value * 0.1f;
 241         float cutoff_hz = 20.0 * pow(2.0, octaves);
 242         global_mixer->set_locut_cutoff(cutoff_hz);
 243
 244         char buf[256];
 245         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 246         ui->locut_cutoff_display->setText(buf);
 247 }
 248
 249 void MainWindow::limiter_threshold_knob_changed(int value)
 250 {
 251         float threshold_dbfs = value * 0.1f;
 252         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 253
 254         char buf[256];
 255         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 256         ui->limiter_threshold_db_display->setText(buf);
 257 }
 258
 259 void MainWindow::compressor_threshold_knob_changed(int value)
 260 {
 261         float threshold_dbfs = value * 0.1f;
 262         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 263
 264         char buf[256];
 265         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 266         ui->compressor_threshold_db_display->setText(buf);
 267 }
 268
 269 void MainWindow::reset_meters_button_clicked()
 270 {
 271         global_mixer->reset_meters();
 272         ui->peak_display->setText("-inf");
 273         ui->peak_display->setStyleSheet("");
 274 }
 275
 276 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
 277                                       float range_low_lufs, float range_high_lufs,
 278                                       float gain_staging_db, float final_makeup_gain_db,
 279                                       float correlation)
 280 {
 281         timeval now;
 282         gettimeofday(&now, nullptr);
 283
 284         // The meters are somewhat inefficient to update. Only update them
 285         // every 100 ms or so (we get updates every 5–20 ms).
 286         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 287                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 288         if (last_update_age < 0.100) {
 289                 return;
 290         }
 291         last_audio_level_callback = now;
 292
 293         post_to_main_thread([=]() {
 294                 ui->vu_meter->set_level(level_lufs);
 295                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 296                 ui->correlation_meter->set_correlation(correlation);
 297
 298                 char buf[256];
 299                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 300                 ui->peak_display->setText(buf);
 301                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 302                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 303                 } else {
 304                         ui->peak_display->setStyleSheet("");
 305                 }
 306
 307                 ui->gainstaging_knob->blockSignals(true);
 308                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 309                 ui->gainstaging_knob->blockSignals(false);
 310                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 311                 ui->gainstaging_db_display->setText(buf);
 312
 313                 ui->makeup_gain_knob->blockSignals(true);
 314                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
 315                 ui->makeup_gain_knob->blockSignals(false);
 316                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
 317                 ui->makeup_gain_db_display->setText(buf);
 318         });
 319 }
 320
 321 void MainWindow::relayout()
 322 {
 323         int height = ui->vertical_layout->geometry().height();
 324
 325         double remaining_height = height;
 326
 327         // Allocate the height; the most important part is to keep the main displays
 328         // at 16:9 if at all possible.
 329         double me_width = ui->me_preview->width();
 330         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 331
 332         // TODO: Scale the widths when we need to do this.
 333         if (me_height / double(height) > 0.8) {
 334                 me_height = height * 0.8;
 335         }
 336         remaining_height -= me_height + ui->vertical_layout->spacing();
 337
 338         double audiostrip_height = ui->audiostrip->geometry().height();
 339         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 340
 341         // The previews will be constrained by the remaining height, and the width.
 342         double preview_label_height = previews[0]->title_bar->geometry().height() +
 343                 previews[0]->main_vertical_layout->spacing();
 344         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
 345         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 346         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 347
 348         ui->vertical_layout->setStretch(0, lrintf(me_height));
 349         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 350         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 351         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 352
 353         // Set the widths for the previews.
 354         double preview_width = preview_height * 16.0 / 9.0;
 355         for (unsigned i = 0; i < previews.size(); ++i) {
 356                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 357         }
 358
 359         // The preview horizontal spacer.
 360         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 361         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 362 }
 363
 364 void MainWindow::set_transition_names(vector<string> transition_names)
 365 {
 366         if (transition_names.size() < 1 || transition_names[0].empty()) {
 367                 transition_btn1->setText(QString(""));
 368         } else {
 369                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
 370                 ui->transition_btn1->setShortcut(QKeySequence("J"));
 371         }
 372         if (transition_names.size() < 2 || transition_names[1].empty()) {
 373                 transition_btn2->setText(QString(""));
 374         } else {
 375                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
 376                 ui->transition_btn2->setShortcut(QKeySequence("K"));
 377         }
 378         if (transition_names.size() < 3 || transition_names[2].empty()) {
 379                 transition_btn3->setText(QString(""));
 380         } else {
 381                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
 382                 ui->transition_btn3->setShortcut(QKeySequence("L"));
 383         }
 384 }
 385
 386 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
 387 {
 388         if (output >= Mixer::OUTPUT_INPUT0) {
 389                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 390                 previews[channel]->label->setText(name.c_str());
 391         }
 392 }
 393
 394 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
 395 {
 396         if (output >= Mixer::OUTPUT_INPUT0) {
 397                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 398                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 399         }
 400 }
 401
 402 void MainWindow::transition_clicked(int transition_number)
 403 {
 404         global_mixer->transition_clicked(transition_number);
 405 }
 406
 407 void MainWindow::channel_clicked(int channel_number)
 408 {
 409         if (current_wb_pick_display == channel_number) {
 410                 // The picking was already done from eventFilter(), since we don't get
 411                 // the mouse pointer here.
 412         } else {
 413                 global_mixer->channel_clicked(channel_number);
 414         }
 415 }
 416
 417 void MainWindow::wb_button_clicked(int channel_number)
 418 {
 419         current_wb_pick_display = channel_number;
 420         QApplication::setOverrideCursor(Qt::CrossCursor);
 421 }
 422
 423 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 424 {
 425         if (current_wb_pick_display != -1 &&
 426             event->type() == QEvent::MouseButtonRelease &&
 427             watched->isWidgetType()) {
 428                 QApplication::restoreOverrideCursor();
 429                 if (watched == previews[current_wb_pick_display]->display) {
 430                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 431                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 432                 } else {
 433                         // The user clicked on something else, give up.
 434                         // (The click goes through, which might not be ideal, but, yes.)
 435                         current_wb_pick_display = -1;
 436                 }
 437         }
 438         return false;
 439 }
 440
 441 namespace {
 442
 443 double srgb_to_linear(double x)
 444 {
 445         if (x < 0.04045) {
 446                 return x / 12.92;
 447         } else {
 448                 return pow((x + 0.055) / 1.055, 2.4);
 449         }
 450 }
 451
 452 }  // namespace
 453
 454 void MainWindow::set_white_balance(int channel_number, int x, int y)
 455 {
 456         // Set the white balance to neutral for the grab. It's probably going to
 457         // flicker a bit, but hopefully this display is not live anyway.
 458         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 459         previews[channel_number]->display->updateGL();
 460         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 461
 462         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 463         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 464         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 465         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 466         previews[channel_number]->display->updateGL();
 467 }