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         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
  96         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
  97 }
  98
  99 void MainWindow::cutoff_knob_changed(int value)
 100 {
 101         float octaves = value * 0.1f;
 102         float cutoff_hz = 20.0 * pow(2.0, octaves);
 103         global_mixer->set_locut_cutoff(cutoff_hz);
 104
 105         char buf[256];
 106         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 107         ui->locut_cutoff_display->setText(buf);
 108 }
 109
 110 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)
 111 {
 112         post_to_main_thread([=]() {
 113                 ui->vu_meter->set_level(level_lufs);
 114                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 115
 116                 char buf[256];
 117                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 118                 ui->peak_display->setText(buf);
 119                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 120                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 121                 } else {
 122                         ui->peak_display->setStyleSheet("");
 123                 }
 124
 125                 ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 126                 snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 127                 ui->gainstaging_db_display->setText(buf);
 128         });
 129 }
 130
 131 void MainWindow::relayout()
 132 {
 133         int height = ui->vertical_layout->geometry().height();
 134
 135         double remaining_height = height;
 136
 137         // Allocate the height; the most important part is to keep the main displays
 138         // at 16:9 if at all possible.
 139         double me_width = ui->me_preview->width();
 140         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 141
 142         // TODO: Scale the widths when we need to do this.
 143         if (me_height / double(height) > 0.8) {
 144                 me_height = height * 0.8;
 145         }
 146         remaining_height -= me_height + ui->vertical_layout->spacing();
 147
 148         double audiostrip_height = ui->audiostrip->geometry().height();
 149         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 150
 151         // The previews will be constrained by the remaining height, and the width.
 152         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 153         int preview_total_width = ui->preview_displays->geometry().width();
 154         double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 155         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 156
 157         ui->vertical_layout->setStretch(0, lrintf(me_height));
 158         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 159         ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
 160         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 161
 162         // Set the widths for the previews.
 163         double preview_width = preview_height * 16.0 / 9.0;
 164         double remaining_preview_width = preview_total_width;
 165
 166         for (unsigned i = 0; i < previews.size(); ++i) {
 167                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 168                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 169         }
 170
 171         // The preview horizontal spacer.
 172         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 173 }
 174
 175 void MainWindow::set_transition_names(vector<string> transition_names)
 176 {
 177         if (transition_names.size() < 1) {
 178                 transition_btn1->setText(QString(""));
 179         } else {
 180                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 181         }
 182         if (transition_names.size() < 2) {
 183                 transition_btn2->setText(QString(""));
 184         } else {
 185                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 186         }
 187         if (transition_names.size() < 3) {
 188                 transition_btn3->setText(QString(""));
 189         } else {
 190                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 191         }
 192 }
 193
 194 void MainWindow::transition_clicked(int transition_number)
 195 {
 196         global_mixer->transition_clicked(transition_number);
 197 }
 198
 199 void MainWindow::channel_clicked(int channel_number)
 200 {
 201         if (current_wb_pick_display == channel_number) {
 202                 // The picking was already done from eventFilter(), since we don't get
 203                 // the mouse pointer here.
 204         } else {
 205                 global_mixer->channel_clicked(channel_number);
 206         }
 207 }
 208
 209 void MainWindow::wb_button_clicked(int channel_number)
 210 {
 211         current_wb_pick_display = channel_number;
 212         QApplication::setOverrideCursor(Qt::CrossCursor);
 213 }
 214
 215 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 216 {
 217         if (current_wb_pick_display != -1 &&
 218             event->type() == QEvent::MouseButtonRelease &&
 219             watched->isWidgetType()) {
 220                 QApplication::restoreOverrideCursor();
 221                 if (watched == previews[current_wb_pick_display]->display) {
 222                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 223                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 224                 } else {
 225                         // The user clicked on something else, give up.
 226                         // (The click goes through, which might not be ideal, but, yes.)
 227                         current_wb_pick_display = -1;
 228                 }
 229         }
 230         return false;
 231 }
 232
 233 namespace {
 234
 235 double srgb_to_linear(double x)
 236 {
 237         if (x < 0.04045) {
 238                 return x / 12.92;
 239         } else {
 240                 return pow((x + 0.055) / 1.055, 2.4);
 241         }
 242 }
 243
 244 }  // namespace
 245
 246 void MainWindow::set_white_balance(int channel_number, int x, int y)
 247 {
 248         // Set the white balance to neutral for the grab. It's probably going to
 249         // flicker a bit, but hopefully this display is not live anyway.
 250         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 251         previews[channel_number]->display->updateGL();
 252         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 253
 254         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 255         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 256         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 257         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 258         previews[channel_number]->display->updateGL();
 259 }