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