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         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
  97         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
  98         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
  99                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 100         });
 101         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 102                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 103         });
 104         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 105         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
 106 }
 107
 108 void MainWindow::cutoff_knob_changed(int value)
 109 {
 110         float octaves = value * 0.1f;
 111         float cutoff_hz = 20.0 * pow(2.0, octaves);
 112         global_mixer->set_locut_cutoff(cutoff_hz);
 113
 114         char buf[256];
 115         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 116         ui->locut_cutoff_display->setText(buf);
 117 }
 118
 119 void MainWindow::limiter_threshold_knob_changed(int value)
 120 {
 121         float threshold_dbfs = value * 0.1f;
 122         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 123
 124         char buf[256];
 125         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 126         ui->limiter_threshold_db_display->setText(buf);
 127 }
 128
 129 void MainWindow::compressor_threshold_knob_changed(int value)
 130 {
 131         float threshold_dbfs = value * 0.1f;
 132         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 133
 134         char buf[256];
 135         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 136         ui->compressor_threshold_db_display->setText(buf);
 137 }
 138
 139 void MainWindow::reset_meters_button_clicked()
 140 {
 141         global_mixer->reset_meters();
 142         ui->peak_display->setText("-inf");
 143         ui->peak_display->setStyleSheet("");
 144 }
 145
 146 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)
 147 {
 148         post_to_main_thread([=]() {
 149                 ui->vu_meter->set_level(level_lufs);
 150                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 151
 152                 char buf[256];
 153                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 154                 ui->peak_display->setText(buf);
 155                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 156                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 157                 } else {
 158                         ui->peak_display->setStyleSheet("");
 159                 }
 160
 161                 ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 162                 snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 163                 ui->gainstaging_db_display->setText(buf);
 164         });
 165 }
 166
 167 void MainWindow::relayout()
 168 {
 169         int height = ui->vertical_layout->geometry().height();
 170
 171         double remaining_height = height;
 172
 173         // Allocate the height; the most important part is to keep the main displays
 174         // at 16:9 if at all possible.
 175         double me_width = ui->me_preview->width();
 176         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 177
 178         // TODO: Scale the widths when we need to do this.
 179         if (me_height / double(height) > 0.8) {
 180                 me_height = height * 0.8;
 181         }
 182         remaining_height -= me_height + ui->vertical_layout->spacing();
 183
 184         double audiostrip_height = ui->audiostrip->geometry().height();
 185         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 186
 187         // The previews will be constrained by the remaining height, and the width.
 188         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 189         int preview_total_width = ui->preview_displays->geometry().width();
 190         double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 191         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 192
 193         ui->vertical_layout->setStretch(0, lrintf(me_height));
 194         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 195         ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
 196         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 197
 198         // Set the widths for the previews.
 199         double preview_width = preview_height * 16.0 / 9.0;
 200         double remaining_preview_width = preview_total_width;
 201
 202         for (unsigned i = 0; i < previews.size(); ++i) {
 203                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 204                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 205         }
 206
 207         // The preview horizontal spacer.
 208         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 209 }
 210
 211 void MainWindow::set_transition_names(vector<string> transition_names)
 212 {
 213         if (transition_names.size() < 1) {
 214                 transition_btn1->setText(QString(""));
 215         } else {
 216                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 217         }
 218         if (transition_names.size() < 2) {
 219                 transition_btn2->setText(QString(""));
 220         } else {
 221                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 222         }
 223         if (transition_names.size() < 3) {
 224                 transition_btn3->setText(QString(""));
 225         } else {
 226                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 227         }
 228 }
 229
 230 void MainWindow::transition_clicked(int transition_number)
 231 {
 232         global_mixer->transition_clicked(transition_number);
 233 }
 234
 235 void MainWindow::channel_clicked(int channel_number)
 236 {
 237         if (current_wb_pick_display == channel_number) {
 238                 // The picking was already done from eventFilter(), since we don't get
 239                 // the mouse pointer here.
 240         } else {
 241                 global_mixer->channel_clicked(channel_number);
 242         }
 243 }
 244
 245 void MainWindow::wb_button_clicked(int channel_number)
 246 {
 247         current_wb_pick_display = channel_number;
 248         QApplication::setOverrideCursor(Qt::CrossCursor);
 249 }
 250
 251 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 252 {
 253         if (current_wb_pick_display != -1 &&
 254             event->type() == QEvent::MouseButtonRelease &&
 255             watched->isWidgetType()) {
 256                 QApplication::restoreOverrideCursor();
 257                 if (watched == previews[current_wb_pick_display]->display) {
 258                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 259                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 260                 } else {
 261                         // The user clicked on something else, give up.
 262                         // (The click goes through, which might not be ideal, but, yes.)
 263                         current_wb_pick_display = -1;
 264                 }
 265         }
 266         return false;
 267 }
 268
 269 namespace {
 270
 271 double srgb_to_linear(double x)
 272 {
 273         if (x < 0.04045) {
 274                 return x / 12.92;
 275         } else {
 276                 return pow((x + 0.055) / 1.055, 2.4);
 277         }
 278 }
 279
 280 }  // namespace
 281
 282 void MainWindow::set_white_balance(int channel_number, int x, int y)
 283 {
 284         // Set the white balance to neutral for the grab. It's probably going to
 285         // flicker a bit, but hopefully this display is not live anyway.
 286         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 287         previews[channel_number]->display->updateGL();
 288         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 289
 290         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 291         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 292         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 293         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 294         previews[channel_number]->display->updateGL();
 295 }