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         char buf[256];
  96         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
  97         ui->limiter_threshold_db_display->setText(buf);
  98         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
  99         ui->compressor_threshold_db_display->setText(buf);
 100
 101         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
 102         cutoff_knob_changed(ui->locut_cutoff_knob->value());
 103
 104         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
 105         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
 106         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
 107                 global_mixer->set_limiter_enabled(state == Qt::Checked);
 108         });
 109         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
 110                 global_mixer->set_compressor_enabled(state == Qt::Checked);
 111         });
 112         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
 113         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6));
 114 }
 115
 116 void MainWindow::cutoff_knob_changed(int value)
 117 {
 118         float octaves = value * 0.1f;
 119         float cutoff_hz = 20.0 * pow(2.0, octaves);
 120         global_mixer->set_locut_cutoff(cutoff_hz);
 121
 122         char buf[256];
 123         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
 124         ui->locut_cutoff_display->setText(buf);
 125 }
 126
 127 void MainWindow::limiter_threshold_knob_changed(int value)
 128 {
 129         float threshold_dbfs = value * 0.1f;
 130         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
 131
 132         char buf[256];
 133         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 134         ui->limiter_threshold_db_display->setText(buf);
 135 }
 136
 137 void MainWindow::compressor_threshold_knob_changed(int value)
 138 {
 139         float threshold_dbfs = value * 0.1f;
 140         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
 141
 142         char buf[256];
 143         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
 144         ui->compressor_threshold_db_display->setText(buf);
 145 }
 146
 147 void MainWindow::reset_meters_button_clicked()
 148 {
 149         global_mixer->reset_meters();
 150         ui->peak_display->setText("-inf");
 151         ui->peak_display->setStyleSheet("");
 152 }
 153
 154 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)
 155 {
 156         timeval now;
 157         gettimeofday(&now, nullptr);
 158
 159         // The meters are somewhat inefficient to update. Only update them
 160         // every 100 ms or so (we get updates every 5–20 ms).
 161         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
 162                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
 163         if (last_update_age < 0.100) {
 164                 return;
 165         }
 166         last_audio_level_callback = now;
 167
 168         post_to_main_thread([=]() {
 169                 ui->vu_meter->set_level(level_lufs);
 170                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
 171
 172                 char buf[256];
 173                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
 174                 ui->peak_display->setText(buf);
 175                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 176                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 177                 } else {
 178                         ui->peak_display->setStyleSheet("");
 179                 }
 180
 181                 ui->gainstaging_knob->setValue(lrintf(auto_gain_staging_db * 10.0f));
 182                 snprintf(buf, sizeof(buf), "%+.1f dB", auto_gain_staging_db);
 183                 ui->gainstaging_db_display->setText(buf);
 184         });
 185 }
 186
 187 void MainWindow::relayout()
 188 {
 189         int height = ui->vertical_layout->geometry().height();
 190
 191         double remaining_height = height;
 192
 193         // Allocate the height; the most important part is to keep the main displays
 194         // at 16:9 if at all possible.
 195         double me_width = ui->me_preview->width();
 196         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
 197
 198         // TODO: Scale the widths when we need to do this.
 199         if (me_height / double(height) > 0.8) {
 200                 me_height = height * 0.8;
 201         }
 202         remaining_height -= me_height + ui->vertical_layout->spacing();
 203
 204         double audiostrip_height = ui->audiostrip->geometry().height();
 205         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
 206
 207         // The previews will be constrained by the remaining height, and the width.
 208         double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
 209         int preview_total_width = ui->preview_displays->geometry().width();
 210         double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 211         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 212
 213         ui->vertical_layout->setStretch(0, lrintf(me_height));
 214         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
 215         ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
 216         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
 217
 218         // Set the widths for the previews.
 219         double preview_width = preview_height * 16.0 / 9.0;
 220         double remaining_preview_width = preview_total_width;
 221
 222         for (unsigned i = 0; i < previews.size(); ++i) {
 223                 ui->preview_displays->setStretch(i, lrintf(preview_width));
 224                 remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 225         }
 226
 227         // The preview horizontal spacer.
 228         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 229 }
 230
 231 void MainWindow::set_transition_names(vector<string> transition_names)
 232 {
 233         if (transition_names.size() < 1) {
 234                 transition_btn1->setText(QString(""));
 235         } else {
 236                 transition_btn1->setText(QString::fromStdString(transition_names[0]));
 237         }
 238         if (transition_names.size() < 2) {
 239                 transition_btn2->setText(QString(""));
 240         } else {
 241                 transition_btn2->setText(QString::fromStdString(transition_names[1]));
 242         }
 243         if (transition_names.size() < 3) {
 244                 transition_btn3->setText(QString(""));
 245         } else {
 246                 transition_btn3->setText(QString::fromStdString(transition_names[2]));
 247         }
 248 }
 249
 250 void MainWindow::transition_clicked(int transition_number)
 251 {
 252         global_mixer->transition_clicked(transition_number);
 253 }
 254
 255 void MainWindow::channel_clicked(int channel_number)
 256 {
 257         if (current_wb_pick_display == channel_number) {
 258                 // The picking was already done from eventFilter(), since we don't get
 259                 // the mouse pointer here.
 260         } else {
 261                 global_mixer->channel_clicked(channel_number);
 262         }
 263 }
 264
 265 void MainWindow::wb_button_clicked(int channel_number)
 266 {
 267         current_wb_pick_display = channel_number;
 268         QApplication::setOverrideCursor(Qt::CrossCursor);
 269 }
 270
 271 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
 272 {
 273         if (current_wb_pick_display != -1 &&
 274             event->type() == QEvent::MouseButtonRelease &&
 275             watched->isWidgetType()) {
 276                 QApplication::restoreOverrideCursor();
 277                 if (watched == previews[current_wb_pick_display]->display) {
 278                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
 279                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
 280                 } else {
 281                         // The user clicked on something else, give up.
 282                         // (The click goes through, which might not be ideal, but, yes.)
 283                         current_wb_pick_display = -1;
 284                 }
 285         }
 286         return false;
 287 }
 288
 289 namespace {
 290
 291 double srgb_to_linear(double x)
 292 {
 293         if (x < 0.04045) {
 294                 return x / 12.92;
 295         } else {
 296                 return pow((x + 0.055) / 1.055, 2.4);
 297         }
 298 }
 299
 300 }  // namespace
 301
 302 void MainWindow::set_white_balance(int channel_number, int x, int y)
 303 {
 304         // Set the white balance to neutral for the grab. It's probably going to
 305         // flicker a bit, but hopefully this display is not live anyway.
 306         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
 307         previews[channel_number]->display->updateGL();
 308         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
 309
 310         double r = srgb_to_linear(qRed(reference_color) / 255.0);
 311         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
 312         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
 313         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
 314         previews[channel_number]->display->updateGL();
 315 }