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
  30 Q_DECLARE_METATYPE(std::vector<std::string>);
  31
  32 MainWindow *global_mainwindow = nullptr;
  33
  34 MainWindow::MainWindow()
  35         : ui(new Ui::MainWindow)
  36 {
  37         global_mainwindow = this;
  38         ui->setupUi(this);
  39
  40         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
  41         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
  42
  43         // Hook up the transition buttons.
  44         // TODO: Make them dynamic.
  45         connect(ui->transition_btn1, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 0));
  46         connect(ui->transition_btn2, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 1));
  47         connect(ui->transition_btn3, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 2));
  48
  49         // Aiee...
  50         transition_btn1 = ui->transition_btn1;
  51         transition_btn2 = ui->transition_btn2;
  52         transition_btn3 = ui->transition_btn3;
  53         qRegisterMetaType<std::vector<std::string>>("std::vector<std::string>");
  54         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
  55 }
  56
  57 void MainWindow::resizeEvent(QResizeEvent* event)
  58 {
  59         QMainWindow::resizeEvent(event);
  60
  61         // Ask for a relayout, but only after the event loop is done doing relayout
  62         // on everything else.
  63         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
  64 }
  65
  66 void MainWindow::mixer_created(Mixer *mixer)
  67 {
  68         // Make the previews.
  69         unsigned num_previews = mixer->get_num_channels();
  70
  71         for (unsigned i = 0; i < num_previews; ++i) {
  72                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
  73
  74                 QWidget *preview = new QWidget(this);
  75                 Ui::Display *ui_display = new Ui::Display;
  76                 ui_display->setupUi(preview);
  77                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
  78                 ui_display->display->set_output(output);
  79                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
  80                 previews.push_back(ui_display);
  81
  82                 // Hook up the click.
  83                 connect(ui_display->display, &GLWidget::clicked, std::bind(&MainWindow::channel_clicked, this, i));
  84
  85                 // Hook up the keyboard key.
  86                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
  87                 connect(shortcut, &QShortcut::activated, std::bind(&MainWindow::channel_clicked, this, i));
  88
  89                 // Hook up the white balance button (irrelevant if invisible).
  90                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
  91                 connect(ui_display->wb_button, &QPushButton::clicked, std::bind(&MainWindow::wb_button_clicked, this, i));
  92         }
  93
  94         mixer->set_audio_level_callback([this](float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs, float auto_gain_staging_db){
  95                 post_to_main_thread([=]() {
  96                         ui->vu_meter->set_level(level_lufs);
  97                         ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
  98
  99                         char buf[256];
 100                         snprintf(buf, sizeof(buf), "%.1f", peak_db);
 101                         ui->peak_display->setText(buf);
 102                         if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 103                                 ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 104                         } else {
 105                                 ui->peak_display->setStyleSheet("");
 106                         }
 107
 108                         ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 109                         snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 110                         ui->gainstaging_db_display->setText(buf);
 111                 });
 112         });
 113 }
 114
 115 void MainWindow::relayout()
 116 {
 117         int height = ui->vertical_layout->geometry().height();
 118
 119         double remaining_height = height;
 120
 121         // Allocate the height; the most important part is to keep the main displays
 122         // at 16:9 if at all possible.
 123         double me_width = ui->me_preview->width();
 124         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 125
 126         // TODO: Scale the widths when we need to do this.
 127         if (me_height / double(height) > 0.8) {
 128                 me_height = height * 0.8;
 129         }
 130         remaining_height -= me_height + ui->vertical_layout->spacing();
 131
 132         double audiostrip_height = ui->audiostrip->geometry().height();
 133         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 134
 135         // The previews will be constrained by the remaining height, and the width.
 136         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 137         int preview_total_width = ui->preview_displays->geometry().width();
 138         double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 139         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 140
 141         ui->vertical_layout->setStretch(0, lrintf(me_height));
 142         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 143         ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
 144         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 145
 146         // Set the widths for the previews.
 147         double preview_width = preview_height * 16.0 / 9.0;
 148         double remaining_preview_width = preview_total_width;
 149
 150         for (unsigned i = 0; i < previews.size(); ++i) {
 151                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 152                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 153         }
 154
 155         // The preview horizontal spacer.
 156         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 157 }
 158
 159 void MainWindow::set_transition_names(vector<string> transition_names)
 160 {
 161         if (transition_names.size() < 1) {
 162                 transition_btn1->setText(QString(""));
 163         } else {
 164                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 165         }
 166         if (transition_names.size() < 2) {
 167                 transition_btn2->setText(QString(""));
 168         } else {
 169                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 170         }
 171         if (transition_names.size() < 3) {
 172                 transition_btn3->setText(QString(""));
 173         } else {
 174                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 175         }
 176 }
 177
 178 void MainWindow::transition_clicked(int transition_number)
 179 {
 180         global_mixer->transition_clicked(transition_number);
 181 }
 182
 183 void MainWindow::channel_clicked(int channel_number)
 184 {
 185         if (current_wb_pick_display == channel_number) {
 186                 // The picking was already done from eventFilter(), since we don't get
 187                 // the mouse pointer here.
 188         } else {
 189                 global_mixer->channel_clicked(channel_number);
 190         }
 191 }
 192
 193 void MainWindow::wb_button_clicked(int channel_number)
 194 {
 195         current_wb_pick_display = channel_number;
 196         QApplication::setOverrideCursor(Qt::CrossCursor);
 197 }
 198
 199 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 200 {
 201         if (current_wb_pick_display != -1 &&
 202             event->type() == QEvent::MouseButtonRelease &&
 203             watched->isWidgetType()) {
 204                 QApplication::restoreOverrideCursor();
 205                 if (watched == previews[current_wb_pick_display]->display) {
 206                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 207                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 208                 } else {
 209                         // The user clicked on something else, give up.
 210                         // (The click goes through, which might not be ideal, but, yes.)
 211                         current_wb_pick_display = -1;
 212                 }
 213         }
 214         return false;
 215 }
 216
 217 namespace {
 218
 219 double srgb_to_linear(double x)
 220 {
 221         if (x < 0.04045) {
 222                 return x / 12.92;
 223         } else {
 224                 return pow((x + 0.055) / 1.055, 2.4);
 225         }
 226 }
 227
 228 }  // namespace
 229
 230 void MainWindow::set_white_balance(int channel_number, int x, int y)
 231 {
 232         // Set the white balance to neutral for the grab. It's probably going to
 233         // flicker a bit, but hopefully this display is not live anyway.
 234         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 235         previews[channel_number]->display->updateGL();
 236         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 237
 238         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 239         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 240         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 241         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 242         previews[channel_number]->display->updateGL();
 243 }