git.sesse.net Git - nageru/blob - mainwindow.cpp

   1 #include "mainwindow.h"
   2
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <algorithm>
   6 #include <string>
   7 #include <vector>
   8 #include <QBoxLayout>
   9 #include <QKeySequence>
  10 #include <QLabel>
  11 #include <QMetaType>
  12 #include <QPushButton>
  13 #include <QResizeEvent>
  14 #include <QShortcut>
  15 #include <QSize>
  16 #include <QString>
  17
  18 #include "glwidget.h"
  19 #include "lrameter.h"
  20 #include "mixer.h"
  21 #include "post_to_main_thread.h"
  22 #include "ui_display.h"
  23 #include "ui_mainwindow.h"
  24 #include "vumeter.h"
  25
  26 class QResizeEvent;
  27
  28 using namespace std;
  29 using namespace std::placeholders;
  30
  31 Q_DECLARE_METATYPE(std::vector<std::string>);
  32
  33 MainWindow *global_mainwindow = nullptr;
  34
  35 MainWindow::MainWindow()
  36         : ui(new Ui::MainWindow)
  37 {
  38         global_mainwindow = this;
  39         ui->setupUi(this);
  40
  41         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  42         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  43
  44         // The menu.
  45         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
  46         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
  47
  48         // Hook up the transition buttons.
  49         // TODO: Make them dynamic.
  50         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
  51         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
  52         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
  53
  54         // Aiee...
  55         transition_btn1 = ui->transition_btn1;
  56         transition_btn2 = ui->transition_btn2;
  57         transition_btn3 = ui->transition_btn3;
  58         qRegisterMetaType<vector<string>>("std::vector<std::string>");
  59         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  60         qRegisterMetaType<Mixer::Output>("Mixer::Output");
  61 }
  62
  63 void MainWindow::resizeEvent(QResizeEvent* event)
  64 {
  65         QMainWindow::resizeEvent(event);
  66
  67         // Ask for a relayout, but only after the event loop is done doing relayout
  68         // on everything else.
  69         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  70 }
  71
  72 void MainWindow::mixer_created(Mixer *mixer)
  73 {
  74         // Make the previews.
  75         unsigned num_previews = mixer->get_num_channels();
  76
  77         for (unsigned i = 0; i < num_previews; ++i) {
  78                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  79
  80                 QWidget *preview = new QWidget(this);
  81                 Ui::Display *ui_display = new Ui::Display;
  82                 ui_display->setupUi(preview);
  83                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
  84                 ui_display->display->set_output(output);
  85                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
  86                 previews.push_back(ui_display);
  87
  88                 // Hook up the click.
  89                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
  90
  91                 // Let the theme update the text whenever the resolution changed.
  92                 connect(ui_display->display, &GLWidget::resolution_updated, this, &MainWindow::update_channel_name);
  93
  94                 // Hook up the keyboard key.
  95                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
  96                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
  97
  98                 // Hook up the white balance button (irrelevant if invisible).
  99                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
 100                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
 101         }
 102
 103         char buf[256];
 104         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
 105         ui->limiter_threshold_db_display->setText(buf);
 106         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
 107         ui->compressor_threshold_db_display->setText(buf);
 108
 109         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 110         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 111
 112         // Not QDial::valueChanged, as we call setValue() all the time.
 113         connect(ui->gainstaging_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::gain_staging_knob_changed);
 114         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 115                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
 116         });
 117
 118         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 119         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 120         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 121                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 122         });
 123         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 124                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 125         });
 126         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 127         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
 128 }
 129
 130 void MainWindow::mixer_shutting_down()
 131 {
 132         ui->me_live->clean_context();
 133         ui->me_preview->clean_context();
 134         for (Ui::Display *display : previews) {
 135                 display->display->clean_context();
 136         }
 137 }
 138
 139 void MainWindow::cut_triggered()
 140 {
 141         global_mixer->schedule_cut();
 142 }
 143
 144 void MainWindow::exit_triggered()
 145 {
 146         close();
 147 }
 148
 149 void MainWindow::gain_staging_knob_changed(int value)
 150 {
 151         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
 152
 153         float gain_db = value * 0.1f;
 154         global_mixer->set_gain_staging_db(gain_db);
 155
 156         // The label will be updated by the audio level callback.
 157 }
 158
 159 void MainWindow::cutoff_knob_changed(int value)
 160 {
 161         float octaves = value * 0.1f;
 162         float cutoff_hz = 20.0 * pow(2.0, octaves);
 163         global_mixer->set_locut_cutoff(cutoff_hz);
 164
 165         char buf[256];
 166         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 167         ui->locut_cutoff_display->setText(buf);
 168 }
 169
 170 void MainWindow::limiter_threshold_knob_changed(int value)
 171 {
 172         float threshold_dbfs = value * 0.1f;
 173         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 174
 175         char buf[256];
 176         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 177         ui->limiter_threshold_db_display->setText(buf);
 178 }
 179
 180 void MainWindow::compressor_threshold_knob_changed(int value)
 181 {
 182         float threshold_dbfs = value * 0.1f;
 183         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 184
 185         char buf[256];
 186         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 187         ui->compressor_threshold_db_display->setText(buf);
 188 }
 189
 190 void MainWindow::reset_meters_button_clicked()
 191 {
 192         global_mixer->reset_meters();
 193         ui->peak_display->setText("-inf");
 194         ui->peak_display->setStyleSheet("");
 195 }
 196
 197 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float gain_staging_db)
 198 {
 199         timeval now;
 200         gettimeofday(&now, nullptr);
 201
 202         // The meters are somewhat inefficient to update. Only update them
 203         // every 100 ms or so (we get updates every 5–20 ms).
 204         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 205                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 206         if (last_update_age < 0.100) {
 207                 return;
 208         }
 209         last_audio_level_callback = now;
 210
 211         post_to_main_thread([=]() {
 212                 ui->vu_meter->set_level(level_lufs);
 213                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 214
 215                 char buf[256];
 216                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 217                 ui->peak_display->setText(buf);
 218                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 219                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 220                 } else {
 221                         ui->peak_display->setStyleSheet("");
 222                 }
 223
 224                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
 225                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
 226                 ui->gainstaging_db_display->setText(buf);
 227         });
 228 }
 229
 230 void MainWindow::relayout()
 231 {
 232         int height = ui->vertical_layout->geometry().height();
 233
 234         double remaining_height = height;
 235
 236         // Allocate the height; the most important part is to keep the main displays
 237         // at 16:9 if at all possible.
 238         double me_width = ui->me_preview->width();
 239         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 240
 241         // TODO: Scale the widths when we need to do this.
 242         if (me_height / double(height) > 0.8) {
 243                 me_height = height * 0.8;
 244         }
 245         remaining_height -= me_height + ui->vertical_layout->spacing();
 246
 247         double audiostrip_height = ui->audiostrip->geometry().height();
 248         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 249
 250         // The previews will be constrained by the remaining height, and the width.
 251         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 252         int preview_total_width = ui->preview_displays->geometry().width();
 253         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 254         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 255
 256         ui->vertical_layout->setStretch(0, lrintf(me_height));
 257         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 258         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 259         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 260
 261         // Set the widths for the previews.
 262         double preview_width = preview_height * 16.0 / 9.0;
 263         double remaining_preview_width = preview_total_width;
 264
 265         for (unsigned i = 0; i < previews.size(); ++i) {
 266                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 267                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 268         }
 269
 270         // The preview horizontal spacer.
 271         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 272 }
 273
 274 void MainWindow::set_transition_names(vector<string> transition_names)
 275 {
 276         if (transition_names.size() < 1) {
 277                 transition_btn1->setText(QString(""));
 278         } else {
 279                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 280         }
 281         if (transition_names.size() < 2) {
 282                 transition_btn2->setText(QString(""));
 283         } else {
 284                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 285         }
 286         if (transition_names.size() < 3) {
 287                 transition_btn3->setText(QString(""));
 288         } else {
 289                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 290         }
 291 }
 292
 293 void MainWindow::update_channel_name(Mixer::Output output)
 294 {
 295         if (output >= Mixer::OUTPUT_INPUT0) {
 296                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 297                 previews[channel]->label->setText(global_mixer->get_channel_name(output).c_str());
 298         }
 299 }
 300
 301 void MainWindow::transition_clicked(int transition_number)
 302 {
 303         global_mixer->transition_clicked(transition_number);
 304 }
 305
 306 void MainWindow::channel_clicked(int channel_number)
 307 {
 308         if (current_wb_pick_display == channel_number) {
 309                 // The picking was already done from eventFilter(), since we don't get
 310                 // the mouse pointer here.
 311         } else {
 312                 global_mixer->channel_clicked(channel_number);
 313         }
 314 }
 315
 316 void MainWindow::wb_button_clicked(int channel_number)
 317 {
 318         current_wb_pick_display = channel_number;
 319         QApplication::setOverrideCursor(Qt::CrossCursor);
 320 }
 321
 322 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 323 {
 324         if (current_wb_pick_display != -1 &&
 325             event->type() == QEvent::MouseButtonRelease &&
 326             watched->isWidgetType()) {
 327                 QApplication::restoreOverrideCursor();
 328                 if (watched == previews[current_wb_pick_display]->display) {
 329                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 330                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 331                 } else {
 332                         // The user clicked on something else, give up.
 333                         // (The click goes through, which might not be ideal, but, yes.)
 334                         current_wb_pick_display = -1;
 335                 }
 336         }
 337         return false;
 338 }
 339
 340 namespace {
 341
 342 double srgb_to_linear(double x)
 343 {
 344         if (x < 0.04045) {
 345                 return x / 12.92;
 346         } else {
 347                 return pow((x + 0.055) / 1.055, 2.4);
 348         }
 349 }
 350
 351 }  // namespace
 352
 353 void MainWindow::set_white_balance(int channel_number, int x, int y)
 354 {
 355         // Set the white balance to neutral for the grab. It's probably going to
 356         // flicker a bit, but hopefully this display is not live anyway.
 357         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 358         previews[channel_number]->display->updateGL();
 359         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 360
 361         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 362         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 363         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 364         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 365         previews[channel_number]->display->updateGL();
 366 }