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 "ui_display.h"
  22 #include "ui_mainwindow.h"
  23 #include "vumeter.h"
  24
  25 class QResizeEvent;
  26
  27 using namespace std;
  28
  29 Q_DECLARE_METATYPE(std::vector<std::string>);
  30
  31 MainWindow *global_mainwindow = nullptr;
  32
  33 MainWindow::MainWindow()
  34         : ui(new Ui::MainWindow)
  35 {
  36         global_mainwindow = this;
  37         ui->setupUi(this);
  38
  39         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  40         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  41
  42         // Hook up the transition buttons.
  43         // TODO: Make them dynamic.
  44         connect(ui->transition_btn1, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 0));
  45         connect(ui->transition_btn2, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 1));
  46         connect(ui->transition_btn3, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 2));
  47
  48         // Aiee...
  49         transition_btn1 = ui->transition_btn1;
  50         transition_btn2 = ui->transition_btn2;
  51         transition_btn3 = ui->transition_btn3;
  52         qRegisterMetaType<std::vector<std::string>>("std::vector<std::string>");
  53         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  54 }
  55
  56 void MainWindow::resizeEvent(QResizeEvent* event)
  57 {
  58         QMainWindow::resizeEvent(event);
  59
  60         // Ask for a relayout, but only after the event loop is done doing relayout
  61         // on everything else.
  62         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  63 }
  64
  65 void MainWindow::mixer_created(Mixer *mixer)
  66 {
  67         // Make the previews.
  68         unsigned num_previews = mixer->get_num_channels();
  69
  70         for (unsigned i = 0; i < num_previews; ++i) {
  71                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  72
  73                 QWidget *preview = new QWidget(this);
  74                 Ui::Display *ui_display = new Ui::Display;
  75                 ui_display->setupUi(preview);
  76                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
  77                 ui_display->display->set_output(output);
  78                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
  79                 previews.push_back(ui_display);
  80
  81                 // Hook up the click.
  82                 connect(ui_display->display, &GLWidget::clicked, std::bind(&MainWindow::channel_clicked, this, i));
  83
  84                 // Hook up the keyboard key.
  85                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
  86                 connect(shortcut, &QShortcut::activated, std::bind(&MainWindow::channel_clicked, this, i));
  87
  88                 // Hook up the white balance button (irrelevant if invisible).
  89                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
  90                 connect(ui_display->wb_button, &QPushButton::clicked, std::bind(&MainWindow::wb_button_clicked, this, i));
  91         }
  92
  93         mixer->set_audio_level_callback([this](float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs){
  94                 ui->vu_meter->set_level(level_lufs);
  95                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
  96
  97                 char buf[256];
  98                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
  99                 ui->peak_display->setText(buf);
 100                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 101                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 102                 } else {
 103                         ui->peak_display->setStyleSheet("");
 104                 }
 105         });
 106 }
 107
 108 void MainWindow::relayout()
 109 {
 110         int width = size().width();
 111         int height = size().height();
 112
 113         // Allocate the height; the most important part is to keep the main displays
 114         // at 16:9 if at all possible.
 115         double me_width = ui->me_preview->width();
 116         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height();
 117
 118         // TODO: Scale the widths when we need to do this.
 119         if (me_height / double(height) > 0.8) {
 120                 me_height = height * 0.8;
 121         }
 122
 123         // The previews will be constrained by the remaining height, and the width.
 124         // FIXME: spacing?
 125         double preview_label_height = previews[0]->label->height();
 126         double preview_height = std::min(height - me_height - preview_label_height, (width / double(previews.size())) * 9.0 / 16.0);
 127
 128         ui->vertical_layout->setStretch(0, lrintf(me_height));
 129         ui->vertical_layout->setStretch(1, std::max<int>(1, lrintf(height - me_height - preview_height)));
 130         ui->vertical_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 131
 132         // Set the widths for the previews.
 133         double preview_width = preview_height * 16.0 / 9.0;  // FIXME: spacing?
 134
 135         for (unsigned i = 0; i < previews.size(); ++i) {
 136                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 137         }
 138
 139         // The spacer.
 140         ui->preview_displays->setStretch(previews.size(), lrintf(width - previews.size() * preview_width));
 141 }
 142
 143 void MainWindow::set_transition_names(vector<string> transition_names)
 144 {
 145         if (transition_names.size() < 1) {
 146                 transition_btn1->setText(QString(""));
 147         } else {
 148                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 149         }
 150         if (transition_names.size() < 2) {
 151                 transition_btn2->setText(QString(""));
 152         } else {
 153                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 154         }
 155         if (transition_names.size() < 3) {
 156                 transition_btn3->setText(QString(""));
 157         } else {
 158                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 159         }
 160 }
 161
 162 void MainWindow::transition_clicked(int transition_number)
 163 {
 164         global_mixer->transition_clicked(transition_number);
 165 }
 166
 167 void MainWindow::channel_clicked(int channel_number)
 168 {
 169         if (current_wb_pick_display == channel_number) {
 170                 // The picking was already done from eventFilter(), since we don't get
 171                 // the mouse pointer here.
 172         } else {
 173                 global_mixer->channel_clicked(channel_number);
 174         }
 175 }
 176
 177 void MainWindow::wb_button_clicked(int channel_number)
 178 {
 179         current_wb_pick_display = channel_number;
 180         QApplication::setOverrideCursor(Qt::CrossCursor);
 181 }
 182
 183 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 184 {
 185         if (current_wb_pick_display != -1 &&
 186             event->type() == QEvent::MouseButtonRelease &&
 187             watched->isWidgetType()) {
 188                 QApplication::restoreOverrideCursor();
 189                 if (watched == previews[current_wb_pick_display]->display) {
 190                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 191                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 192                 } else {
 193                         // The user clicked on something else, give up.
 194                         // (The click goes through, which might not be ideal, but, yes.)
 195                         current_wb_pick_display = -1;
 196                 }
 197         }
 198         return false;
 199 }
 200
 201 namespace {
 202
 203 double srgb_to_linear(double x)
 204 {
 205         if (x < 0.04045) {
 206                 return x / 12.92;
 207         } else {
 208                 return pow((x + 0.055) / 1.055, 2.4);
 209         }
 210 }
 211
 212 }  // namespace
 213
 214 void MainWindow::set_white_balance(int channel_number, int x, int y)
 215 {
 216         // Set the white balance to neutral for the grab. It's probably going to
 217         // flicker a bit, but hopefully this display is not live anyway.
 218         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 219         previews[channel_number]->display->updateGL();
 220         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 221
 222         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 223         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 224         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 225         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 226         previews[channel_number]->display->updateGL();
 227 }