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         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
 113                 global_mixer->set_gainstaging_auto(state == Qt::Checked);
 114         });
 115
 116         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 117         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 118         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 119                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 120         });
 121         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 122                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 123         });
 124         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 125         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
 126 }
 127
 128 void MainWindow::mixer_shutting_down()
 129 {
 130         ui->me_live->clean_context();
 131         ui->me_preview->clean_context();
 132         for (Ui::Display *display : previews) {
 133                 display->display->clean_context();
 134         }
 135 }
 136
 137 void MainWindow::cut_triggered()
 138 {
 139         global_mixer->schedule_cut();
 140 }
 141
 142 void MainWindow::exit_triggered()
 143 {
 144         close();
 145 }
 146
 147 void MainWindow::cutoff_knob_changed(int value)
 148 {
 149         float octaves = value * 0.1f;
 150         float cutoff_hz = 20.0 * pow(2.0, octaves);
 151         global_mixer->set_locut_cutoff(cutoff_hz);
 152
 153         char buf[256];
 154         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 155         ui->locut_cutoff_display->setText(buf);
 156 }
 157
 158 void MainWindow::limiter_threshold_knob_changed(int value)
 159 {
 160         float threshold_dbfs = value * 0.1f;
 161         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 162
 163         char buf[256];
 164         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 165         ui->limiter_threshold_db_display->setText(buf);
 166 }
 167
 168 void MainWindow::compressor_threshold_knob_changed(int value)
 169 {
 170         float threshold_dbfs = value * 0.1f;
 171         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 172
 173         char buf[256];
 174         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 175         ui->compressor_threshold_db_display->setText(buf);
 176 }
 177
 178 void MainWindow::reset_meters_button_clicked()
 179 {
 180         global_mixer->reset_meters();
 181         ui->peak_display->setText("-inf");
 182         ui->peak_display->setStyleSheet("");
 183 }
 184
 185 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float auto_gain_staging_db)
 186 {
 187         timeval now;
 188         gettimeofday(&now, nullptr);
 189
 190         // The meters are somewhat inefficient to update. Only update them
 191         // every 100 ms or so (we get updates every 5–20 ms).
 192         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 193                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 194         if (last_update_age < 0.100) {
 195                 return;
 196         }
 197         last_audio_level_callback = now;
 198
 199         post_to_main_thread([=]() {
 200                 ui->vu_meter->set_level(level_lufs);
 201                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 202
 203                 char buf[256];
 204                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 205                 ui->peak_display->setText(buf);
 206                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 207                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 208                 } else {
 209                         ui->peak_display->setStyleSheet("");
 210                 }
 211
 212                 ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 213                 snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 214                 ui->gainstaging_db_display->setText(buf);
 215         });
 216 }
 217
 218 void MainWindow::relayout()
 219 {
 220         int height = ui->vertical_layout->geometry().height();
 221
 222         double remaining_height = height;
 223
 224         // Allocate the height; the most important part is to keep the main displays
 225         // at 16:9 if at all possible.
 226         double me_width = ui->me_preview->width();
 227         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 228
 229         // TODO: Scale the widths when we need to do this.
 230         if (me_height / double(height) > 0.8) {
 231                 me_height = height * 0.8;
 232         }
 233         remaining_height -= me_height + ui->vertical_layout->spacing();
 234
 235         double audiostrip_height = ui->audiostrip->geometry().height();
 236         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 237
 238         // The previews will be constrained by the remaining height, and the width.
 239         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 240         int preview_total_width = ui->preview_displays->geometry().width();
 241         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 242         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 243
 244         ui->vertical_layout->setStretch(0, lrintf(me_height));
 245         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 246         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
 247         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 248
 249         // Set the widths for the previews.
 250         double preview_width = preview_height * 16.0 / 9.0;
 251         double remaining_preview_width = preview_total_width;
 252
 253         for (unsigned i = 0; i < previews.size(); ++i) {
 254                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 255                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 256         }
 257
 258         // The preview horizontal spacer.
 259         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 260 }
 261
 262 void MainWindow::set_transition_names(vector<string> transition_names)
 263 {
 264         if (transition_names.size() < 1) {
 265                 transition_btn1->setText(QString(""));
 266         } else {
 267                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 268         }
 269         if (transition_names.size() < 2) {
 270                 transition_btn2->setText(QString(""));
 271         } else {
 272                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 273         }
 274         if (transition_names.size() < 3) {
 275                 transition_btn3->setText(QString(""));
 276         } else {
 277                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 278         }
 279 }
 280
 281 void MainWindow::update_channel_name(Mixer::Output output)
 282 {
 283         if (output >= Mixer::OUTPUT_INPUT0) {
 284                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
 285                 previews[channel]->label->setText(global_mixer->get_channel_name(output).c_str());
 286         }
 287 }
 288
 289 void MainWindow::transition_clicked(int transition_number)
 290 {
 291         global_mixer->transition_clicked(transition_number);
 292 }
 293
 294 void MainWindow::channel_clicked(int channel_number)
 295 {
 296         if (current_wb_pick_display == channel_number) {
 297                 // The picking was already done from eventFilter(), since we don't get
 298                 // the mouse pointer here.
 299         } else {
 300                 global_mixer->channel_clicked(channel_number);
 301         }
 302 }
 303
 304 void MainWindow::wb_button_clicked(int channel_number)
 305 {
 306         current_wb_pick_display = channel_number;
 307         QApplication::setOverrideCursor(Qt::CrossCursor);
 308 }
 309
 310 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 311 {
 312         if (current_wb_pick_display != -1 &&
 313             event->type() == QEvent::MouseButtonRelease &&
 314             watched->isWidgetType()) {
 315                 QApplication::restoreOverrideCursor();
 316                 if (watched == previews[current_wb_pick_display]->display) {
 317                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 318                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 319                 } else {
 320                         // The user clicked on something else, give up.
 321                         // (The click goes through, which might not be ideal, but, yes.)
 322                         current_wb_pick_display = -1;
 323                 }
 324         }
 325         return false;
 326 }
 327
 328 namespace {
 329
 330 double srgb_to_linear(double x)
 331 {
 332         if (x < 0.04045) {
 333                 return x / 12.92;
 334         } else {
 335                 return pow((x + 0.055) / 1.055, 2.4);
 336         }
 337 }
 338
 339 }  // namespace
 340
 341 void MainWindow::set_white_balance(int channel_number, int x, int y)
 342 {
 343         // Set the white balance to neutral for the grab. It's probably going to
 344         // flicker a bit, but hopefully this display is not live anyway.
 345         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 346         previews[channel_number]->display->updateGL();
 347         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 348
 349         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 350         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 351         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 352         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 353         previews[channel_number]->display->updateGL();
 354 }