1 #include "mainwindow.h"
11 #include <QInputDialog>
12 #include <QKeySequence>
15 #include <QPushButton>
16 #include <QResizeEvent>
21 #include "aboutdialog.h"
22 #include "disk_space_estimator.h"
25 #include "input_mapping_dialog.h"
28 #include "post_to_main_thread.h"
29 #include "ui_audio_miniview.h"
30 #include "ui_display.h"
31 #include "ui_mainwindow.h"
37 using namespace std::chrono;
38 using namespace std::placeholders;
40 Q_DECLARE_METATYPE(std::string);
41 Q_DECLARE_METATYPE(std::vector<std::string>);
43 MainWindow *global_mainwindow = nullptr;
47 void schedule_cut_signal(int ignored)
49 global_mixer->schedule_cut();
52 void quit_signal(int ignored)
54 global_mainwindow->close();
57 void slave_knob(QDial *master, QDial *slave)
59 QWidget::connect(master, &QDial::valueChanged, [slave](int value){
60 slave->blockSignals(true);
61 slave->setValue(value);
62 slave->blockSignals(false);
64 QWidget::connect(slave, &QDial::valueChanged, [master](int value){
65 master->setValue(value);
69 void slave_checkbox(QCheckBox *master, QCheckBox *slave)
71 QWidget::connect(master, &QCheckBox::stateChanged, [slave](int state){
72 slave->blockSignals(true);
73 slave->setCheckState(Qt::CheckState(state));
74 slave->blockSignals(false);
76 QWidget::connect(slave, &QCheckBox::stateChanged, [master](int state){
77 master->setCheckState(Qt::CheckState(state));
81 constexpr unsigned DB_NO_FLAGS = 0x0;
82 constexpr unsigned DB_WITH_SIGN = 0x1;
83 constexpr unsigned DB_BARE = 0x2;
85 string format_db(double db, unsigned flags)
88 if (flags & DB_WITH_SIGN) {
91 snprintf(buf, sizeof(buf), "%+.1f", db);
93 } else if (db < 0.0) {
96 // Should never happen, really.
102 snprintf(buf, sizeof(buf), "%.1f", db);
104 } else if (db < 0.0) {
107 // Should never happen, really.
111 if (!(flags & DB_BARE)) {
119 MainWindow::MainWindow()
120 : ui(new Ui::MainWindow)
122 global_mainwindow = this;
125 global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
126 disk_free_label = new QLabel(this);
127 disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
128 ui->menuBar->setCornerWidget(disk_free_label);
130 ui->me_live->set_output(Mixer::OUTPUT_LIVE);
131 ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
134 connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
135 connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
136 connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
137 connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
139 if (global_flags.x264_video_to_http) {
140 connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
142 ui->x264_bitrate_action->setEnabled(false);
145 // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
146 // TODO: Make them dynamic.
147 connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
148 connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
149 connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
152 transition_btn1 = ui->transition_btn1;
153 transition_btn2 = ui->transition_btn2;
154 transition_btn3 = ui->transition_btn3;
155 qRegisterMetaType<string>("std::string");
156 qRegisterMetaType<vector<string>>("std::vector<std::string>");
157 connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
158 qRegisterMetaType<Mixer::Output>("Mixer::Output");
160 // Hook up the prev/next buttons on the audio views.
161 connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
162 connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
163 connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
164 connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
166 last_audio_level_callback = steady_clock::now() - seconds(1);
169 void MainWindow::resizeEvent(QResizeEvent* event)
171 QMainWindow::resizeEvent(event);
173 // Ask for a relayout, but only after the event loop is done doing relayout
174 // on everything else.
175 QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
178 void MainWindow::mixer_created(Mixer *mixer)
180 // Make the previews.
181 unsigned num_previews = mixer->get_num_channels();
183 for (unsigned i = 0; i < num_previews; ++i) {
184 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
186 QWidget *preview = new QWidget(this);
187 Ui::Display *ui_display = new Ui::Display;
188 ui_display->setupUi(preview);
189 ui_display->label->setText(mixer->get_channel_name(output).c_str());
190 ui_display->display->set_output(output);
191 ui->preview_displays->insertWidget(previews.size(), preview, 1);
192 previews.push_back(ui_display);
194 // Hook up the click.
195 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
197 // Let the theme update the text whenever the resolution or color changed.
198 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
199 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
201 // Hook up the keyboard key.
202 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
203 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
205 // Hook up the white balance button (irrelevant if invisible).
206 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
207 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
210 setup_audio_miniview();
212 slave_knob(ui->locut_cutoff_knob, ui->locut_cutoff_knob_2);
213 slave_knob(ui->limiter_threshold_knob, ui->limiter_threshold_knob_2);
214 slave_knob(ui->makeup_gain_knob, ui->makeup_gain_knob_2);
215 slave_checkbox(ui->makeup_gain_auto_checkbox, ui->makeup_gain_auto_checkbox_2);
216 slave_checkbox(ui->limiter_enabled, ui->limiter_enabled_2);
218 // TODO: Fetch all of the values these for completeness,
219 // not just the enable knobs implied by flags.
220 ui->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled());
221 ui->gainstaging_knob->setValue(global_mixer->get_audio_mixer()->get_gain_staging_db());
222 ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_gain_staging_auto());
223 ui->compressor_enabled->setChecked(global_mixer->get_audio_mixer()->get_compressor_enabled());
224 ui->limiter_enabled->setChecked(global_mixer->get_audio_mixer()->get_limiter_enabled());
225 ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_final_makeup_gain_auto());
227 QString limiter_threshold_label(
228 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
229 ui->limiter_threshold_db_display->setText(limiter_threshold_label);
230 ui->limiter_threshold_db_display_2->setText(limiter_threshold_label);
231 ui->compressor_threshold_db_display->setText(
232 QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
234 connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
235 cutoff_knob_changed(ui->locut_cutoff_knob->value());
236 connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
237 global_mixer->get_audio_mixer()->set_locut_enabled(state == Qt::Checked);
240 connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
241 connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
242 global_mixer->get_audio_mixer()->set_gain_staging_auto(state == Qt::Checked);
244 connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
245 connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
246 global_mixer->get_audio_mixer()->set_final_makeup_gain_auto(state == Qt::Checked);
249 connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
250 connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
251 connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
252 global_mixer->get_audio_mixer()->set_limiter_enabled(state == Qt::Checked);
254 connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
255 global_mixer->get_audio_mixer()->set_compressor_enabled(state == Qt::Checked);
257 connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
258 mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8, _9));
260 struct sigaction act;
261 memset(&act, 0, sizeof(act));
262 act.sa_handler = schedule_cut_signal;
263 act.sa_flags = SA_RESTART;
264 sigaction(SIGHUP, &act, nullptr);
266 // Mostly for debugging. Don't override SIGINT, that's so evil if
267 // shutdown isn't instant.
268 memset(&act, 0, sizeof(act));
269 act.sa_handler = quit_signal;
270 act.sa_flags = SA_RESTART;
271 sigaction(SIGUSR1, &act, nullptr);
274 void MainWindow::setup_audio_miniview()
276 // Remove any existing channels.
277 for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
278 delete item->widget();
281 audio_miniviews.clear();
283 // Set up brand new ones from the input mapping.
284 InputMapping mapping = global_mixer->get_audio_mixer()->get_input_mapping();
285 audio_miniviews.resize(mapping.buses.size());
286 for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
287 QWidget *channel = new QWidget(this);
288 Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
289 ui_audio_miniview->setupUi(channel);
290 ui_audio_miniview->bus_desc_label->setFullText(
291 QString::fromStdString(mapping.buses[bus_index].name));
292 audio_miniviews[bus_index] = ui_audio_miniview;
293 // TODO: Set the fader position.
294 ui->faders->addWidget(channel);
296 connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
297 bind(&MainWindow::mini_fader_changed, this, ui_audio_miniview, bus_index, _1));
301 void MainWindow::mixer_shutting_down()
303 ui->me_live->clean_context();
304 ui->me_preview->clean_context();
305 for (Ui::Display *display : previews) {
306 display->display->clean_context();
310 void MainWindow::cut_triggered()
312 global_mixer->schedule_cut();
315 void MainWindow::x264_bitrate_triggered()
318 int new_bitrate = QInputDialog::getInt(this, "Change x264 bitrate", "Choose new bitrate for x264 HTTP output (from 100–100,000 kbit/sec):", global_flags.x264_bitrate, /*min=*/100, /*max=*/100000, /*step=*/100, &ok);
319 if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
320 global_flags.x264_bitrate = new_bitrate;
321 global_mixer->change_x264_bitrate(new_bitrate);
325 void MainWindow::exit_triggered()
330 void MainWindow::about_triggered()
332 AboutDialog().exec();
335 void MainWindow::input_mapping_triggered()
337 if (InputMappingDialog().exec() == QDialog::Accepted) {
338 setup_audio_miniview();
342 void MainWindow::gain_staging_knob_changed(int value)
344 ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
346 float gain_db = value * 0.1f;
347 global_mixer->get_audio_mixer()->set_gain_staging_db(gain_db);
349 // The label will be updated by the audio level callback.
352 void MainWindow::final_makeup_gain_knob_changed(int value)
354 ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
356 float gain_db = value * 0.1f;
357 global_mixer->get_audio_mixer()->set_final_makeup_gain_db(gain_db);
359 // The label will be updated by the audio level callback.
362 void MainWindow::cutoff_knob_changed(int value)
364 float octaves = value * 0.1f;
365 float cutoff_hz = 20.0 * pow(2.0, octaves);
366 global_mixer->get_audio_mixer()->set_locut_cutoff(cutoff_hz);
369 snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
370 ui->locut_cutoff_display->setText(buf);
371 ui->locut_cutoff_display_2->setText(buf);
374 void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
377 if (estimated_seconds_left < 60.0) {
378 strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
379 } else if (estimated_seconds_left < 1800.0) { // Less than half an hour: Xm Ys (red).
380 int s = lrintf(estimated_seconds_left);
383 snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
384 } else if (estimated_seconds_left < 3600.0) { // Less than an hour: Xm.
385 int m = lrintf(estimated_seconds_left / 60.0);
386 snprintf(time_str, sizeof(time_str), "%dm", m);
387 } else if (estimated_seconds_left < 36000.0) { // Less than ten hours: Xh Ym.
388 int m = lrintf(estimated_seconds_left / 60.0);
391 snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
392 } else { // More than ten hours: Xh.
393 int h = lrintf(estimated_seconds_left / 3600.0);
394 snprintf(time_str, sizeof(time_str), "%dh", h);
397 snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
399 std::string label = buf;
401 post_to_main_thread([this, label]{
402 disk_free_label->setText(QString::fromStdString(label));
403 ui->menuBar->setCornerWidget(disk_free_label); // Need to set this again for the sizing to get right.
407 void MainWindow::limiter_threshold_knob_changed(int value)
409 float threshold_dbfs = value * 0.1f;
410 global_mixer->get_audio_mixer()->set_limiter_threshold_dbfs(threshold_dbfs);
411 ui->limiter_threshold_db_display->setText(
412 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
413 ui->limiter_threshold_db_display_2->setText(
414 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
417 void MainWindow::compressor_threshold_knob_changed(int value)
419 float threshold_dbfs = value * 0.1f;
420 global_mixer->get_audio_mixer()->set_compressor_threshold_dbfs(threshold_dbfs);
421 ui->compressor_threshold_db_display->setText(
422 QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
425 void MainWindow::mini_fader_changed(Ui::AudioMiniView *ui, int channel, double volume_db)
428 if (isfinite(volume_db)) {
429 snprintf(buf, sizeof(buf), "%+.1f dB", volume_db);
430 ui->fader_label->setText(buf);
432 ui->fader_label->setText("-∞ dB");
435 global_mixer->get_audio_mixer()->set_fader_volume(channel, volume_db);
438 void MainWindow::reset_meters_button_clicked()
440 global_mixer->get_audio_mixer()->reset_meters();
441 ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
442 ui->peak_display->setStyleSheet("");
445 void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<float> bus_level_lufs,
446 float global_level_lufs,
447 float range_low_lufs, float range_high_lufs,
448 float gain_staging_db, float final_makeup_gain_db,
451 steady_clock::time_point now = steady_clock::now();
453 // The meters are somewhat inefficient to update. Only update them
454 // every 100 ms or so (we get updates every 5–20 ms).
455 double last_update_age = duration<double>(now - last_audio_level_callback).count();
456 if (last_update_age < 0.100) {
459 last_audio_level_callback = now;
461 post_to_main_thread([=]() {
462 ui->vu_meter->set_level(level_lufs);
463 for (unsigned bus_index = 0; bus_index < bus_level_lufs.size(); ++bus_index) {
464 if (bus_index < audio_miniviews.size()) {
465 audio_miniviews[bus_index]->vu_meter_meter->set_level(
466 bus_level_lufs[bus_index]);
469 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
470 ui->correlation_meter->set_correlation(correlation);
472 ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
473 if (peak_db > -0.1f) { // -0.1 dBFS is EBU peak limit.
474 ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
476 ui->peak_display->setStyleSheet("");
479 ui->gainstaging_knob->blockSignals(true);
480 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
481 ui->gainstaging_knob->blockSignals(false);
482 ui->gainstaging_db_display->setText(
483 QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
485 ui->makeup_gain_knob->blockSignals(true);
486 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
487 ui->makeup_gain_knob->blockSignals(false);
488 ui->makeup_gain_db_display->setText(
489 QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
490 ui->makeup_gain_db_display_2->setText(
491 QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
495 void MainWindow::relayout()
497 int height = ui->vertical_layout->geometry().height();
499 double remaining_height = height;
501 // Allocate the height; the most important part is to keep the main displays
502 // at 16:9 if at all possible.
503 double me_width = ui->me_preview->width();
504 double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
506 // TODO: Scale the widths when we need to do this.
507 if (me_height / double(height) > 0.8) {
508 me_height = height * 0.8;
510 remaining_height -= me_height + ui->vertical_layout->spacing();
512 // Space between the M/E displays and the audio strip.
513 remaining_height -= ui->vertical_layout->spacing();
515 // The label above the audio strip.
516 double compact_label_height = ui->compact_label->geometry().height() +
517 ui->compact_audio_layout->spacing();
518 remaining_height -= compact_label_height;
520 // The previews will be constrained by the remaining height, and the width.
521 double preview_label_height = previews[0]->title_bar->geometry().height() +
522 previews[0]->main_vertical_layout->spacing();
523 int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
524 double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
525 remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
527 ui->vertical_layout->setStretch(0, lrintf(me_height));
528 ui->vertical_layout->setStretch(1,
529 lrintf(compact_label_height) +
530 lrintf(remaining_height) +
531 lrintf(preview_height + preview_label_height)); // Audio strip and previews together.
533 ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
534 ui->compact_audio_layout->setStretch(1, lrintf(remaining_height)); // Audio strip.
535 ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
537 // Set the widths for the previews.
538 double preview_width = preview_height * 16.0 / 9.0;
539 for (unsigned i = 0; i < previews.size(); ++i) {
540 ui->preview_displays->setStretch(i, lrintf(preview_width));
543 // The preview horizontal spacer.
544 double remaining_preview_width = preview_total_width - previews.size() * preview_width;
545 ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
548 void MainWindow::set_transition_names(vector<string> transition_names)
550 if (transition_names.size() < 1 || transition_names[0].empty()) {
551 transition_btn1->setText(QString(""));
553 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
554 ui->transition_btn1->setShortcut(QKeySequence("J"));
556 if (transition_names.size() < 2 || transition_names[1].empty()) {
557 transition_btn2->setText(QString(""));
559 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
560 ui->transition_btn2->setShortcut(QKeySequence("K"));
562 if (transition_names.size() < 3 || transition_names[2].empty()) {
563 transition_btn3->setText(QString(""));
565 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
566 ui->transition_btn3->setShortcut(QKeySequence("L"));
570 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
572 if (output >= Mixer::OUTPUT_INPUT0) {
573 unsigned channel = output - Mixer::OUTPUT_INPUT0;
574 previews[channel]->label->setText(name.c_str());
578 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
580 if (output >= Mixer::OUTPUT_INPUT0) {
581 unsigned channel = output - Mixer::OUTPUT_INPUT0;
582 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
586 void MainWindow::transition_clicked(int transition_number)
588 global_mixer->transition_clicked(transition_number);
591 void MainWindow::channel_clicked(int channel_number)
593 if (current_wb_pick_display == channel_number) {
594 // The picking was already done from eventFilter(), since we don't get
595 // the mouse pointer here.
597 global_mixer->channel_clicked(channel_number);
601 void MainWindow::wb_button_clicked(int channel_number)
603 current_wb_pick_display = channel_number;
604 QApplication::setOverrideCursor(Qt::CrossCursor);
607 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
609 if (current_wb_pick_display != -1 &&
610 event->type() == QEvent::MouseButtonRelease &&
611 watched->isWidgetType()) {
612 QApplication::restoreOverrideCursor();
613 if (watched == previews[current_wb_pick_display]->display) {
614 const QMouseEvent *mouse_event = (QMouseEvent *)event;
615 set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
617 // The user clicked on something else, give up.
618 // (The click goes through, which might not be ideal, but, yes.)
619 current_wb_pick_display = -1;
627 double srgb_to_linear(double x)
632 return pow((x + 0.055) / 1.055, 2.4);
638 void MainWindow::set_white_balance(int channel_number, int x, int y)
640 // Set the white balance to neutral for the grab. It's probably going to
641 // flicker a bit, but hopefully this display is not live anyway.
642 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
643 previews[channel_number]->display->updateGL();
644 QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
646 double r = srgb_to_linear(qRed(reference_color) / 255.0);
647 double g = srgb_to_linear(qGreen(reference_color) / 255.0);
648 double b = srgb_to_linear(qBlue(reference_color) / 255.0);
649 global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
650 previews[channel_number]->display->updateGL();