X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mainwindow.cpp;h=e0db1b6ac8e16b8f3bc5b90269820a0bdc784430;hb=8db504e0abc3d6b5d64f2fc790c4f751c5e0e778;hp=0e96a8a4cdd95c57dd2ac0e037559fc5455a2d00;hpb=98ad355aa5775199aa75089b3fb29ccf552c529e;p=nageru

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 0e96a8a..e0db1b6 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -2,10 +2,13 @@
 
 #include <math.h>
 #include <stdio.h>
+#include <signal.h>
 #include <algorithm>
+#include <chrono>
 #include <string>
 #include <vector>
 #include <QBoxLayout>
+#include <QInputDialog>
 #include <QKeySequence>
 #include <QLabel>
 #include <QMetaType>
@@ -15,9 +18,15 @@
 #include <QSize>
 #include <QString>
 
+#include "aboutdialog.h"
+#include "disk_space_estimator.h"
+#include "flags.h"
 #include "glwidget.h"
+#include "input_mapping_dialog.h"
 #include "lrameter.h"
 #include "mixer.h"
+#include "post_to_main_thread.h"
+#include "ui_audio_miniview.h"
 #include "ui_display.h"
 #include "ui_mainwindow.h"
 #include "vumeter.h"
@@ -25,32 +34,112 @@
 class QResizeEvent;
 
 using namespace std;
+using namespace std::chrono;
+using namespace std::placeholders;
 
+Q_DECLARE_METATYPE(std::string);
 Q_DECLARE_METATYPE(std::vector<std::string>);
 
 MainWindow *global_mainwindow = nullptr;
 
+namespace {
+
+void schedule_cut_signal(int ignored)
+{
+	global_mixer->schedule_cut();
+}
+
+void quit_signal(int ignored)
+{
+	global_mainwindow->close();
+}
+
+constexpr unsigned DB_NO_FLAGS = 0x0;
+constexpr unsigned DB_WITH_SIGN = 0x1;
+constexpr unsigned DB_BARE = 0x2;
+
+string format_db(double db, unsigned flags)
+{
+	string text;
+	if (flags & DB_WITH_SIGN) {
+		if (isfinite(db)) {
+			char buf[256];
+			snprintf(buf, sizeof(buf), "%+.1f", db);
+			text = buf;
+		} else if (db < 0.0) {
+			text = "-∞";
+		} else {
+			// Should never happen, really.
+			text = "+∞";
+		}
+	} else {
+		if (isfinite(db)) {
+			char buf[256];
+			snprintf(buf, sizeof(buf), "%.1f", db);
+			text = buf;
+		} else if (db < 0.0) {
+			text = "-∞";
+		} else {
+			// Should never happen, really.
+			text = "∞";
+		}
+	}
+	if (!(flags & DB_BARE)) {
+		text += " dB";
+	}
+	return text;
+}
+
+}  // namespace
+
 MainWindow::MainWindow()
 	: ui(new Ui::MainWindow)
 {
 	global_mainwindow = this;
 	ui->setupUi(this);
 
+	global_disk_space_estimator = new DiskSpaceEstimator(bind(&MainWindow::report_disk_space, this, _1, _2));
+	disk_free_label = new QLabel(this);
+	disk_free_label->setStyleSheet("QLabel {padding-right: 5px;}");
+	ui->menuBar->setCornerWidget(disk_free_label);
+
 	ui->me_live->set_output(Mixer::OUTPUT_LIVE);
 	ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
 
-	// Hook up the transition buttons.
+	// The menus.
+	connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
+	connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
+	connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered);
+	connect(ui->input_mapping_action, &QAction::triggered, this, &MainWindow::input_mapping_triggered);
+
+	if (global_flags.x264_video_to_http) {
+		connect(ui->x264_bitrate_action, &QAction::triggered, this, &MainWindow::x264_bitrate_triggered);
+	} else {
+		ui->x264_bitrate_action->setEnabled(false);
+	}
+
+	// Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
 	// TODO: Make them dynamic.
-	connect(ui->transition_btn1, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 0));
-	connect(ui->transition_btn2, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 1));
-	connect(ui->transition_btn3, &QPushButton::clicked, std::bind(&MainWindow::transition_clicked, this, 2));
+	connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
+	connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
+	connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
 
 	// Aiee...
 	transition_btn1 = ui->transition_btn1;
 	transition_btn2 = ui->transition_btn2;
 	transition_btn3 = ui->transition_btn3;
-	qRegisterMetaType<std::vector<std::string>>("std::vector<std::string>");
-	connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
+	qRegisterMetaType<string>("std::string");
+	qRegisterMetaType<vector<string>>("std::vector<std::string>");
+	connect(ui->me_live, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
+	qRegisterMetaType<Mixer::Output>("Mixer::Output");
+
+	// Hook up the prev/next buttons on the audio views.
+	connect(ui->compact_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
+	connect(ui->compact_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 1));
+	connect(ui->full_prev_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
+	connect(ui->full_next_page, &QAbstractButton::clicked, bind(&QStackedWidget::setCurrentIndex, ui->audio_views, 0));
+
+	last_audio_level_callback = steady_clock::now() - seconds(1);
 }
 
 void MainWindow::resizeEvent(QResizeEvent* event)
@@ -79,29 +168,290 @@ void MainWindow::mixer_created(Mixer *mixer)
 		previews.push_back(ui_display);
 
 		// Hook up the click.
-		connect(ui_display->display, &GLWidget::clicked, std::bind(&MainWindow::channel_clicked, this, i));
+		connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
+
+		// Let the theme update the text whenever the resolution or color changed.
+		connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
+		connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
 
 		// Hook up the keyboard key.
 		QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
-		connect(shortcut, &QShortcut::activated, std::bind(&MainWindow::channel_clicked, this, i));
+		connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
 
 		// Hook up the white balance button (irrelevant if invisible).
 		ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
-		connect(ui_display->wb_button, &QPushButton::clicked, std::bind(&MainWindow::wb_button_clicked, this, i));
+		connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
+	}
+
+	setup_audio_miniview();
+
+	// TODO: Fetch all of the values these for completeness,
+	// not just the enable knobs implied by flags.
+	ui->locut_enabled->setChecked(global_mixer->get_audio_mixer()->get_locut_enabled());
+	ui->gainstaging_knob->setValue(global_mixer->get_audio_mixer()->get_gain_staging_db());
+	ui->gainstaging_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_gain_staging_auto());
+	ui->compressor_enabled->setChecked(global_mixer->get_audio_mixer()->get_compressor_enabled());
+	ui->limiter_enabled->setChecked(global_mixer->get_audio_mixer()->get_limiter_enabled());
+	ui->makeup_gain_auto_checkbox->setChecked(global_mixer->get_audio_mixer()->get_final_makeup_gain_auto());
+
+	ui->limiter_threshold_db_display->setText(
+		QString::fromStdString(format_db(mixer->get_audio_mixer()->get_limiter_threshold_dbfs(), DB_WITH_SIGN)));
+	ui->compressor_threshold_db_display->setText(
+		QString::fromStdString(format_db(mixer->get_audio_mixer()->get_compressor_threshold_dbfs(), DB_WITH_SIGN)));
+
+	connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
+	cutoff_knob_changed(ui->locut_cutoff_knob->value());
+	connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
+		global_mixer->get_audio_mixer()->set_locut_enabled(state == Qt::Checked);
+	});
+
+	connect(ui->gainstaging_knob, &QAbstractSlider::valueChanged, this, &MainWindow::gain_staging_knob_changed);
+	connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
+		global_mixer->get_audio_mixer()->set_gain_staging_auto(state == Qt::Checked);
+	});
+	connect(ui->makeup_gain_knob, &QAbstractSlider::valueChanged, this, &MainWindow::final_makeup_gain_knob_changed);
+	connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
+		global_mixer->get_audio_mixer()->set_final_makeup_gain_auto(state == Qt::Checked);
+	});
+
+	connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
+	connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
+	connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
+		global_mixer->get_audio_mixer()->set_limiter_enabled(state == Qt::Checked);
+	});
+	connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
+		global_mixer->get_audio_mixer()->set_compressor_enabled(state == Qt::Checked);
+	});
+	connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
+	mixer->get_audio_mixer()->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8, _9));
+
+	struct sigaction act;
+	memset(&act, 0, sizeof(act));
+	act.sa_handler = schedule_cut_signal;
+	act.sa_flags = SA_RESTART;
+	sigaction(SIGHUP, &act, nullptr);
+
+	// Mostly for debugging. Don't override SIGINT, that's so evil if
+	// shutdown isn't instant.
+	memset(&act, 0, sizeof(act));
+	act.sa_handler = quit_signal;
+	act.sa_flags = SA_RESTART;
+	sigaction(SIGUSR1, &act, nullptr);
+}
+
+void MainWindow::setup_audio_miniview()
+{
+	// Remove any existing channels.
+	for (QLayoutItem *item; (item = ui->faders->takeAt(0)) != nullptr; ) {
+		delete item->widget();
+		delete item;
+	}
+	audio_miniviews.clear();
+
+	// Set up brand new ones from the input mapping.
+	InputMapping mapping = global_mixer->get_audio_mixer()->get_input_mapping();
+	audio_miniviews.resize(mapping.buses.size());
+	for (unsigned bus_index = 0; bus_index < mapping.buses.size(); ++bus_index) {
+		QWidget *channel = new QWidget(this);
+		Ui::AudioMiniView *ui_audio_miniview = new Ui::AudioMiniView;
+		ui_audio_miniview->setupUi(channel);
+		ui_audio_miniview->bus_desc_label->setFullText(
+			QString::fromStdString(mapping.buses[bus_index].name));
+		audio_miniviews[bus_index] = ui_audio_miniview;
+		// TODO: Set the fader position.
+		ui->faders->addWidget(channel);
+
+		connect(ui_audio_miniview->fader, &NonLinearFader::dbValueChanged,
+			bind(&MainWindow::mini_fader_changed, this, ui_audio_miniview, bus_index, _1));
+	}
+}
+
+void MainWindow::mixer_shutting_down()
+{
+	ui->me_live->clean_context();
+	ui->me_preview->clean_context();
+	for (Ui::Display *display : previews) {
+		display->display->clean_context();
 	}
+}
+
+void MainWindow::cut_triggered()
+{
+	global_mixer->schedule_cut();
+}
+
+void MainWindow::x264_bitrate_triggered()
+{
+	bool ok;
+	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);
+	if (ok && new_bitrate >= 100 && new_bitrate <= 100000) {
+		global_flags.x264_bitrate = new_bitrate;
+		global_mixer->change_x264_bitrate(new_bitrate);
+	}
+}
+
+void MainWindow::exit_triggered()
+{
+	close();
+}
+
+void MainWindow::about_triggered()
+{
+	AboutDialog().exec();
+}
 
-	mixer->set_audio_level_callback([this](float level_lufs, float peak_db, float global_level_lufs, float range_low_lufs, float range_high_lufs){
+void MainWindow::input_mapping_triggered()
+{
+	if (InputMappingDialog().exec() == QDialog::Accepted) {
+		setup_audio_miniview();
+	}
+}
+
+void MainWindow::gain_staging_knob_changed(int value)
+{
+	ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
+
+	float gain_db = value * 0.1f;
+	global_mixer->get_audio_mixer()->set_gain_staging_db(gain_db);
+
+	// The label will be updated by the audio level callback.
+}
+
+void MainWindow::final_makeup_gain_knob_changed(int value)
+{
+	ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
+
+	float gain_db = value * 0.1f;
+	global_mixer->get_audio_mixer()->set_final_makeup_gain_db(gain_db);
+
+	// The label will be updated by the audio level callback.
+}
+
+void MainWindow::cutoff_knob_changed(int value)
+{
+	float octaves = value * 0.1f;
+	float cutoff_hz = 20.0 * pow(2.0, octaves);
+	global_mixer->get_audio_mixer()->set_locut_cutoff(cutoff_hz);
+
+	char buf[256];
+	snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
+	ui->locut_cutoff_display->setText(buf);
+}
+
+void MainWindow::report_disk_space(off_t free_bytes, double estimated_seconds_left)
+{
+	char time_str[256];
+	if (estimated_seconds_left < 60.0) {
+		strcpy(time_str, "<font color=\"red\">Less than a minute</font>");
+	} else if (estimated_seconds_left < 1800.0) {  // Less than half an hour: Xm Ys (red).
+		int s = lrintf(estimated_seconds_left);
+		int m = s / 60;
+		s %= 60;
+		snprintf(time_str, sizeof(time_str), "<font color=\"red\">%dm %ds</font>", m, s);
+	} else if (estimated_seconds_left < 3600.0) {  // Less than an hour: Xm.
+		int m = lrintf(estimated_seconds_left / 60.0);
+		snprintf(time_str, sizeof(time_str), "%dm", m);
+	} else if (estimated_seconds_left < 36000.0) {  // Less than ten hours: Xh Ym.
+		int m = lrintf(estimated_seconds_left / 60.0);
+		int h = m / 60;
+		m %= 60;
+		snprintf(time_str, sizeof(time_str), "%dh %dm", h, m);
+	} else {  // More than ten hours: Xh.
+		int h = lrintf(estimated_seconds_left / 3600.0);
+		snprintf(time_str, sizeof(time_str), "%dh", h);
+	}
+	char buf[256];
+	snprintf(buf, sizeof(buf), "Disk free: %'.0f MB (approx. %s)", free_bytes / 1048576.0, time_str);
+
+	std::string label = buf;
+
+	post_to_main_thread([this, label]{
+		disk_free_label->setText(QString::fromStdString(label));
+		ui->menuBar->setCornerWidget(disk_free_label);  // Need to set this again for the sizing to get right.
+	});
+}
+
+void MainWindow::limiter_threshold_knob_changed(int value)
+{
+	float threshold_dbfs = value * 0.1f;
+	global_mixer->get_audio_mixer()->set_limiter_threshold_dbfs(threshold_dbfs);
+	ui->limiter_threshold_db_display->setText(
+		QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+}
+
+void MainWindow::compressor_threshold_knob_changed(int value)
+{
+	float threshold_dbfs = value * 0.1f;
+	global_mixer->get_audio_mixer()->set_compressor_threshold_dbfs(threshold_dbfs);
+	ui->compressor_threshold_db_display->setText(
+		QString::fromStdString(format_db(threshold_dbfs, DB_WITH_SIGN)));
+}
+
+void MainWindow::mini_fader_changed(Ui::AudioMiniView *ui, int channel, double volume_db)
+{
+	char buf[256];
+	if (isfinite(volume_db)) {
+		snprintf(buf, sizeof(buf), "%+.1f dB", volume_db);
+		ui->fader_label->setText(buf);
+	} else {
+		ui->fader_label->setText("-∞ dB");
+	}
+
+	global_mixer->get_audio_mixer()->set_fader_volume(channel, volume_db);
+}
+
+void MainWindow::reset_meters_button_clicked()
+{
+	global_mixer->get_audio_mixer()->reset_meters();
+	ui->peak_display->setText(QString::fromStdString(format_db(-HUGE_VAL, DB_WITH_SIGN | DB_BARE)));
+	ui->peak_display->setStyleSheet("");
+}
+
+void MainWindow::audio_level_callback(float level_lufs, float peak_db, vector<float> bus_level_lufs,
+                                      float global_level_lufs,
+                                      float range_low_lufs, float range_high_lufs,
+                                      float gain_staging_db, float final_makeup_gain_db,
+                                      float correlation)
+{
+	steady_clock::time_point now = steady_clock::now();
+
+	// The meters are somewhat inefficient to update. Only update them
+	// every 100 ms or so (we get updates every 5–20 ms).
+	double last_update_age = duration<double>(now - last_audio_level_callback).count();
+	if (last_update_age < 0.100) {
+		return;
+	}
+	last_audio_level_callback = now;
+
+	post_to_main_thread([=]() {
 		ui->vu_meter->set_level(level_lufs);
+		for (unsigned bus_index = 0; bus_index < bus_level_lufs.size(); ++bus_index) {
+			if (bus_index < audio_miniviews.size()) {
+				audio_miniviews[bus_index]->vu_meter_meter->set_level(
+					bus_level_lufs[bus_index]);
+			}
+		}
 		ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
+		ui->correlation_meter->set_correlation(correlation);
 
-		char buf[256];
-		snprintf(buf, sizeof(buf), "%.1f", peak_db);
-		ui->peak_display->setText(buf);
+		ui->peak_display->setText(QString::fromStdString(format_db(peak_db, DB_BARE)));
 		if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
 			ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
 		} else {
 			ui->peak_display->setStyleSheet("");
 		}
+
+		ui->gainstaging_knob->blockSignals(true);
+		ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
+		ui->gainstaging_knob->blockSignals(false);
+		ui->gainstaging_db_display->setText(
+			QString::fromStdString(format_db(gain_staging_db, DB_WITH_SIGN)));
+
+		ui->makeup_gain_knob->blockSignals(true);
+		ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
+		ui->makeup_gain_knob->blockSignals(false);
+		ui->makeup_gain_db_display->setText(
+			QString::fromStdString(format_db(final_makeup_gain_db, DB_WITH_SIGN)));
 	});
 }
 
@@ -122,49 +472,77 @@ void MainWindow::relayout()
 	}
 	remaining_height -= me_height + ui->vertical_layout->spacing();
 
-	double audiostrip_height = ui->audiostrip->geometry().height();
-	remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
+	// Space between the M/E displays and the audio strip.
+	remaining_height -= ui->vertical_layout->spacing();
+
+	// The label above the audio strip.
+	double compact_label_height = ui->compact_label->geometry().height() +
+		ui->compact_audio_layout->spacing();
+	remaining_height -= compact_label_height;
 
 	// The previews will be constrained by the remaining height, and the width.
-	double preview_label_height = previews[0]->title_bar->geometry().height() + ui->preview_displays->spacing();  // Wrong spacing?
-	int preview_total_width = ui->preview_displays->geometry().width();
-	double preview_height = std::min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
+	double preview_label_height = previews[0]->title_bar->geometry().height() +
+		previews[0]->main_vertical_layout->spacing();
+	int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
+	double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
 	remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
 
 	ui->vertical_layout->setStretch(0, lrintf(me_height));
-	ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
-	ui->vertical_layout->setStretch(2, std::max<int>(1, remaining_height));  // Spacer.
-	ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
+	ui->vertical_layout->setStretch(1,
+		lrintf(compact_label_height) +
+		lrintf(remaining_height) +
+		lrintf(preview_height + preview_label_height));  // Audio strip and previews together.
+
+	ui->compact_audio_layout->setStretch(0, lrintf(compact_label_height));
+	ui->compact_audio_layout->setStretch(1, lrintf(remaining_height));  // Audio strip.
+	ui->compact_audio_layout->setStretch(2, lrintf(preview_height + preview_label_height));
 
 	// Set the widths for the previews.
 	double preview_width = preview_height * 16.0 / 9.0;
-	double remaining_preview_width = preview_total_width;
-
 	for (unsigned i = 0; i < previews.size(); ++i) {
 		ui->preview_displays->setStretch(i, lrintf(preview_width));
-		remaining_preview_width -= preview_width + ui->preview_displays->spacing();
 	}
 
 	// The preview horizontal spacer.
+	double remaining_preview_width = preview_total_width - previews.size() * preview_width;
 	ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
 }
 
 void MainWindow::set_transition_names(vector<string> transition_names)
 {
-	if (transition_names.size() < 1) {
+	if (transition_names.size() < 1 || transition_names[0].empty()) {
 		transition_btn1->setText(QString(""));
 	} else {
-		transition_btn1->setText(QString::fromStdString(transition_names[0]));
+		transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
+		ui->transition_btn1->setShortcut(QKeySequence("J"));
 	}
-	if (transition_names.size() < 2) {
+	if (transition_names.size() < 2 || transition_names[1].empty()) {
 		transition_btn2->setText(QString(""));
 	} else {
-		transition_btn2->setText(QString::fromStdString(transition_names[1]));
+		transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
+		ui->transition_btn2->setShortcut(QKeySequence("K"));
 	}
-	if (transition_names.size() < 3) {
+	if (transition_names.size() < 3 || transition_names[2].empty()) {
 		transition_btn3->setText(QString(""));
 	} else {
-		transition_btn3->setText(QString::fromStdString(transition_names[2]));
+		transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
+		ui->transition_btn3->setShortcut(QKeySequence("L"));
+	}
+}
+
+void MainWindow::update_channel_name(Mixer::Output output, const string &name)
+{
+	if (output >= Mixer::OUTPUT_INPUT0) {
+		unsigned channel = output - Mixer::OUTPUT_INPUT0;
+		previews[channel]->label->setText(name.c_str());
+	}
+}
+
+void MainWindow::update_channel_color(Mixer::Output output, const string &color)
+{
+	if (output >= Mixer::OUTPUT_INPUT0) {
+		unsigned channel = output - Mixer::OUTPUT_INPUT0;
+		previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
 	}
 }