]> git.sesse.net Git - nageru/blob - mainwindow.cpp
Fix leaking of streams in HTTPD.
[nageru] / mainwindow.cpp
1 #include "mainwindow.h"
2
3 #include <math.h>
4 #include <stdio.h>
5 #include <signal.h>
6 #include <algorithm>
7 #include <string>
8 #include <vector>
9 #include <QBoxLayout>
10 #include <QKeySequence>
11 #include <QLabel>
12 #include <QMetaType>
13 #include <QPushButton>
14 #include <QResizeEvent>
15 #include <QShortcut>
16 #include <QSize>
17 #include <QString>
18
19 #include "aboutdialog.h"
20 #include "glwidget.h"
21 #include "lrameter.h"
22 #include "mixer.h"
23 #include "post_to_main_thread.h"
24 #include "ui_display.h"
25 #include "ui_mainwindow.h"
26 #include "vumeter.h"
27
28 class QResizeEvent;
29
30 using namespace std;
31 using namespace std::placeholders;
32
33 Q_DECLARE_METATYPE(std::string);
34 Q_DECLARE_METATYPE(std::vector<std::string>);
35
36 MainWindow *global_mainwindow = nullptr;
37
38 namespace {
39
40 void schedule_cut_signal(int ignored)
41 {
42         global_mixer->schedule_cut();
43 }
44
45 void quit_signal(int ignored)
46 {
47         global_mainwindow->close();
48 }
49
50 }  // namespace
51
52 MainWindow::MainWindow()
53         : ui(new Ui::MainWindow)
54 {
55         global_mainwindow = this;
56         ui->setupUi(this);
57
58         ui->me_live->set_output(Mixer::OUTPUT_LIVE);
59         ui->me_preview->set_output(Mixer::OUTPUT_PREVIEW);
60
61         // The menus.
62         connect(ui->cut_action, &QAction::triggered, this, &MainWindow::cut_triggered);
63         connect(ui->exit_action, &QAction::triggered, this, &MainWindow::exit_triggered);
64         connect(ui->about_action, &QAction::triggered, this, &MainWindow::about_triggered),
65
66         // Hook up the transition buttons. (Keyboard shortcuts are set in set_transition_names().)
67         // TODO: Make them dynamic.
68         connect(ui->transition_btn1, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 0));
69         connect(ui->transition_btn2, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 1));
70         connect(ui->transition_btn3, &QPushButton::clicked, bind(&MainWindow::transition_clicked, this, 2));
71
72         // Aiee...
73         transition_btn1 = ui->transition_btn1;
74         transition_btn2 = ui->transition_btn2;
75         transition_btn3 = ui->transition_btn3;
76         qRegisterMetaType<string>("std::string");
77         qRegisterMetaType<vector<string>>("std::vector<std::string>");
78         connect(ui->me_preview, &GLWidget::transition_names_updated, this, &MainWindow::set_transition_names);
79         qRegisterMetaType<Mixer::Output>("Mixer::Output");
80 }
81
82 void MainWindow::resizeEvent(QResizeEvent* event)
83 {
84         QMainWindow::resizeEvent(event);
85
86         // Ask for a relayout, but only after the event loop is done doing relayout
87         // on everything else.
88         QMetaObject::invokeMethod(this, "relayout", Qt::QueuedConnection);
89 }
90
91 void MainWindow::mixer_created(Mixer *mixer)
92 {
93         // Make the previews.
94         unsigned num_previews = mixer->get_num_channels();
95
96         for (unsigned i = 0; i < num_previews; ++i) {
97                 Mixer::Output output = Mixer::Output(Mixer::OUTPUT_INPUT0 + i);
98
99                 QWidget *preview = new QWidget(this);
100                 Ui::Display *ui_display = new Ui::Display;
101                 ui_display->setupUi(preview);
102                 ui_display->label->setText(mixer->get_channel_name(output).c_str());
103                 ui_display->display->set_output(output);
104                 ui->preview_displays->insertWidget(previews.size(), preview, 1);
105                 previews.push_back(ui_display);
106
107                 // Hook up the click.
108                 connect(ui_display->display, &GLWidget::clicked, bind(&MainWindow::channel_clicked, this, i));
109
110                 // Let the theme update the text whenever the resolution or color changed.
111                 connect(ui_display->display, &GLWidget::name_updated, this, &MainWindow::update_channel_name);
112                 connect(ui_display->display, &GLWidget::color_updated, this, &MainWindow::update_channel_color);
113
114                 // Hook up the keyboard key.
115                 QShortcut *shortcut = new QShortcut(QKeySequence(Qt::Key_1 + i), this);
116                 connect(shortcut, &QShortcut::activated, bind(&MainWindow::channel_clicked, this, i));
117
118                 // Hook up the white balance button (irrelevant if invisible).
119                 ui_display->wb_button->setVisible(mixer->get_supports_set_wb(output));
120                 connect(ui_display->wb_button, &QPushButton::clicked, bind(&MainWindow::wb_button_clicked, this, i));
121         }
122
123         char buf[256];
124         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_limiter_threshold_dbfs());
125         ui->limiter_threshold_db_display->setText(buf);
126         snprintf(buf, sizeof(buf), "%.1f dB", mixer->get_compressor_threshold_dbfs());
127         ui->compressor_threshold_db_display->setText(buf);
128
129         connect(ui->locut_cutoff_knob, &QDial::valueChanged, this, &MainWindow::cutoff_knob_changed);
130         cutoff_knob_changed(ui->locut_cutoff_knob->value());
131         connect(ui->locut_enabled, &QCheckBox::stateChanged, [this](int state){
132                 global_mixer->set_locut_enabled(state == Qt::Checked);
133         });
134
135         // Not QDial::valueChanged, as we call setValue() all the time.
136         connect(ui->gainstaging_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::gain_staging_knob_changed);
137         connect(ui->gainstaging_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
138                 global_mixer->set_gain_staging_auto(state == Qt::Checked);
139         });
140         connect(ui->makeup_gain_knob, &QAbstractSlider::sliderMoved, this, &MainWindow::final_makeup_gain_knob_changed);
141         connect(ui->makeup_gain_auto_checkbox, &QCheckBox::stateChanged, [this](int state){
142                 global_mixer->set_final_makeup_gain_auto(state == Qt::Checked);
143         });
144
145         connect(ui->limiter_threshold_knob, &QDial::valueChanged, this, &MainWindow::limiter_threshold_knob_changed);
146         connect(ui->compressor_threshold_knob, &QDial::valueChanged, this, &MainWindow::compressor_threshold_knob_changed);
147         connect(ui->limiter_enabled, &QCheckBox::stateChanged, [this](int state){
148                 global_mixer->set_limiter_enabled(state == Qt::Checked);
149         });
150         connect(ui->compressor_enabled, &QCheckBox::stateChanged, [this](int state){
151                 global_mixer->set_compressor_enabled(state == Qt::Checked);
152         });
153         connect(ui->reset_meters_button, &QPushButton::clicked, this, &MainWindow::reset_meters_button_clicked);
154         mixer->set_audio_level_callback(bind(&MainWindow::audio_level_callback, this, _1, _2, _3, _4, _5, _6, _7, _8));
155
156         struct sigaction act;
157         memset(&act, 0, sizeof(act));
158         act.sa_handler = schedule_cut_signal;
159         act.sa_flags = SA_RESTART;
160         sigaction(SIGHUP, &act, nullptr);
161
162         // Mostly for debugging. Don't override SIGINT, that's so evil if
163         // shutdown isn't instant.
164         memset(&act, 0, sizeof(act));
165         act.sa_handler = quit_signal;
166         act.sa_flags = SA_RESTART;
167         sigaction(SIGUSR1, &act, nullptr);
168 }
169
170 void MainWindow::mixer_shutting_down()
171 {
172         ui->me_live->clean_context();
173         ui->me_preview->clean_context();
174         for (Ui::Display *display : previews) {
175                 display->display->clean_context();
176         }
177 }
178
179 void MainWindow::cut_triggered()
180 {
181         global_mixer->schedule_cut();
182 }
183
184 void MainWindow::exit_triggered()
185 {
186         close();
187 }
188
189 void MainWindow::about_triggered()
190 {
191         AboutDialog().exec();
192 }
193
194 void MainWindow::gain_staging_knob_changed(int value)
195 {
196         ui->gainstaging_auto_checkbox->setCheckState(Qt::Unchecked);
197
198         float gain_db = value * 0.1f;
199         global_mixer->set_gain_staging_db(gain_db);
200
201         // The label will be updated by the audio level callback.
202 }
203
204 void MainWindow::final_makeup_gain_knob_changed(int value)
205 {
206         ui->makeup_gain_auto_checkbox->setCheckState(Qt::Unchecked);
207
208         float gain_db = value * 0.1f;
209         global_mixer->set_final_makeup_gain_db(gain_db);
210
211         // The label will be updated by the audio level callback.
212 }
213
214 void MainWindow::cutoff_knob_changed(int value)
215 {
216         float octaves = value * 0.1f;
217         float cutoff_hz = 20.0 * pow(2.0, octaves);
218         global_mixer->set_locut_cutoff(cutoff_hz);
219
220         char buf[256];
221         snprintf(buf, sizeof(buf), "%ld Hz", lrintf(cutoff_hz));
222         ui->locut_cutoff_display->setText(buf);
223 }
224
225 void MainWindow::limiter_threshold_knob_changed(int value)
226 {
227         float threshold_dbfs = value * 0.1f;
228         global_mixer->set_limiter_threshold_dbfs(threshold_dbfs);
229
230         char buf[256];
231         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
232         ui->limiter_threshold_db_display->setText(buf);
233 }
234
235 void MainWindow::compressor_threshold_knob_changed(int value)
236 {
237         float threshold_dbfs = value * 0.1f;
238         global_mixer->set_compressor_threshold_dbfs(threshold_dbfs);
239
240         char buf[256];
241         snprintf(buf, sizeof(buf), "%.1f dB", threshold_dbfs);
242         ui->compressor_threshold_db_display->setText(buf);
243 }
244
245 void MainWindow::reset_meters_button_clicked()
246 {
247         global_mixer->reset_meters();
248         ui->peak_display->setText("-inf");
249         ui->peak_display->setStyleSheet("");
250 }
251
252 void MainWindow::audio_level_callback(float level_lufs, float peak_db, float global_level_lufs,
253                                       float range_low_lufs, float range_high_lufs,
254                                       float gain_staging_db, float final_makeup_gain_db,
255                                       float correlation)
256 {
257         timeval now;
258         gettimeofday(&now, nullptr);
259
260         // The meters are somewhat inefficient to update. Only update them
261         // every 100 ms or so (we get updates every 5–20 ms).
262         double last_update_age = now.tv_sec - last_audio_level_callback.tv_sec +
263                 1e-6 * (now.tv_usec - last_audio_level_callback.tv_usec);
264         if (last_update_age < 0.100) {
265                 return;
266         }
267         last_audio_level_callback = now;
268
269         post_to_main_thread([=]() {
270                 ui->vu_meter->set_level(level_lufs);
271                 ui->lra_meter->set_levels(global_level_lufs, range_low_lufs, range_high_lufs);
272                 ui->correlation_meter->set_correlation(correlation);
273
274                 char buf[256];
275                 snprintf(buf, sizeof(buf), "%.1f", peak_db);
276                 ui->peak_display->setText(buf);
277                 if (peak_db > -0.1f) {  // -0.1 dBFS is EBU peak limit.
278                         ui->peak_display->setStyleSheet("QLabel { background-color: red; color: white; }");
279                 } else {
280                         ui->peak_display->setStyleSheet("");
281                 }
282
283                 ui->gainstaging_knob->setValue(lrintf(gain_staging_db * 10.0f));
284                 snprintf(buf, sizeof(buf), "%+.1f dB", gain_staging_db);
285                 ui->gainstaging_db_display->setText(buf);
286
287                 ui->makeup_gain_knob->setValue(lrintf(final_makeup_gain_db * 10.0f));
288                 snprintf(buf, sizeof(buf), "%+.1f dB", final_makeup_gain_db);
289                 ui->makeup_gain_db_display->setText(buf);
290         });
291 }
292
293 void MainWindow::relayout()
294 {
295         int height = ui->vertical_layout->geometry().height();
296
297         double remaining_height = height;
298
299         // Allocate the height; the most important part is to keep the main displays
300         // at 16:9 if at all possible.
301         double me_width = ui->me_preview->width();
302         double me_height = me_width * 9.0 / 16.0 + ui->label_preview->height() + ui->preview_vertical_layout->spacing();
303
304         // TODO: Scale the widths when we need to do this.
305         if (me_height / double(height) > 0.8) {
306                 me_height = height * 0.8;
307         }
308         remaining_height -= me_height + ui->vertical_layout->spacing();
309
310         double audiostrip_height = ui->audiostrip->geometry().height();
311         remaining_height -= audiostrip_height + ui->vertical_layout->spacing();
312
313         // The previews will be constrained by the remaining height, and the width.
314         double preview_label_height = previews[0]->title_bar->geometry().height() +
315                 previews[0]->main_vertical_layout->spacing();
316         int preview_total_width = ui->preview_displays->geometry().width() - (previews.size() - 1) * ui->preview_displays->spacing();
317         double preview_height = min(remaining_height - preview_label_height, (preview_total_width / double(previews.size())) * 9.0 / 16.0);
318         remaining_height -= preview_height + preview_label_height + ui->vertical_layout->spacing();
319
320         ui->vertical_layout->setStretch(0, lrintf(me_height));
321         ui->vertical_layout->setStretch(1, 0);  // Don't stretch the audiostrip.
322         ui->vertical_layout->setStretch(2, max<int>(1, remaining_height));  // Spacer.
323         ui->vertical_layout->setStretch(3, lrintf(preview_height + preview_label_height));
324
325         // Set the widths for the previews.
326         double preview_width = preview_height * 16.0 / 9.0;
327         for (unsigned i = 0; i < previews.size(); ++i) {
328                 ui->preview_displays->setStretch(i, lrintf(preview_width));
329         }
330
331         // The preview horizontal spacer.
332         double remaining_preview_width = preview_total_width - previews.size() * preview_width;
333         ui->preview_displays->setStretch(previews.size(), lrintf(remaining_preview_width));
334 }
335
336 void MainWindow::set_transition_names(vector<string> transition_names)
337 {
338         if (transition_names.size() < 1 || transition_names[0].empty()) {
339                 transition_btn1->setText(QString(""));
340         } else {
341                 transition_btn1->setText(QString::fromStdString(transition_names[0] + " (J)"));
342                 ui->transition_btn1->setShortcut(QKeySequence("J"));
343         }
344         if (transition_names.size() < 2 || transition_names[1].empty()) {
345                 transition_btn2->setText(QString(""));
346         } else {
347                 transition_btn2->setText(QString::fromStdString(transition_names[1] + " (K)"));
348                 ui->transition_btn2->setShortcut(QKeySequence("K"));
349         }
350         if (transition_names.size() < 3 || transition_names[2].empty()) {
351                 transition_btn3->setText(QString(""));
352         } else {
353                 transition_btn3->setText(QString::fromStdString(transition_names[2] + " (L)"));
354                 ui->transition_btn3->setShortcut(QKeySequence("L"));
355         }
356 }
357
358 void MainWindow::update_channel_name(Mixer::Output output, const string &name)
359 {
360         if (output >= Mixer::OUTPUT_INPUT0) {
361                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
362                 previews[channel]->label->setText(name.c_str());
363         }
364 }
365
366 void MainWindow::update_channel_color(Mixer::Output output, const string &color)
367 {
368         if (output >= Mixer::OUTPUT_INPUT0) {
369                 unsigned channel = output - Mixer::OUTPUT_INPUT0;
370                 previews[channel]->frame->setStyleSheet(QString::fromStdString("background-color:" + color));
371         }
372 }
373
374 void MainWindow::transition_clicked(int transition_number)
375 {
376         global_mixer->transition_clicked(transition_number);
377 }
378
379 void MainWindow::channel_clicked(int channel_number)
380 {
381         if (current_wb_pick_display == channel_number) {
382                 // The picking was already done from eventFilter(), since we don't get
383                 // the mouse pointer here.
384         } else {
385                 global_mixer->channel_clicked(channel_number);
386         }
387 }
388
389 void MainWindow::wb_button_clicked(int channel_number)
390 {
391         current_wb_pick_display = channel_number;
392         QApplication::setOverrideCursor(Qt::CrossCursor);
393 }
394
395 bool MainWindow::eventFilter(QObject *watched, QEvent *event)
396 {
397         if (current_wb_pick_display != -1 &&
398             event->type() == QEvent::MouseButtonRelease &&
399             watched->isWidgetType()) {
400                 QApplication::restoreOverrideCursor();
401                 if (watched == previews[current_wb_pick_display]->display) {
402                         const QMouseEvent *mouse_event = (QMouseEvent *)event;
403                         set_white_balance(current_wb_pick_display, mouse_event->x(), mouse_event->y());
404                 } else {
405                         // The user clicked on something else, give up.
406                         // (The click goes through, which might not be ideal, but, yes.)
407                         current_wb_pick_display = -1;
408                 }
409         }
410         return false;
411 }
412
413 namespace {
414
415 double srgb_to_linear(double x)
416 {
417         if (x < 0.04045) {
418                 return x / 12.92;
419         } else {
420                 return pow((x + 0.055) / 1.055, 2.4);
421         }
422 }
423
424 }  // namespace
425
426 void MainWindow::set_white_balance(int channel_number, int x, int y)
427 {
428         // Set the white balance to neutral for the grab. It's probably going to
429         // flicker a bit, but hopefully this display is not live anyway.
430         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, 0.5, 0.5, 0.5);
431         previews[channel_number]->display->updateGL();
432         QRgb reference_color = previews[channel_number]->display->grabFrameBuffer().pixel(x, y);
433
434         double r = srgb_to_linear(qRed(reference_color) / 255.0);
435         double g = srgb_to_linear(qGreen(reference_color) / 255.0);
436         double b = srgb_to_linear(qBlue(reference_color) / 255.0);
437         global_mixer->set_wb(Mixer::OUTPUT_INPUT0 + channel_number, r, g, b);
438         previews[channel_number]->display->updateGL();
439 }