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