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