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