Support changing overall playing speed at runtime, using a slider or a MIDI controller.

[nageru] / futatabi / mainwindow.cpp

diff --git a/futatabi/mainwindow.cpp b/futatabi/mainwindow.cpp
index 350b1b2966d5327b20f0980b21e3eda31de401d3..c69f67a17ad0cc43ab209b0b7c07ad4f8d2360c5 100644 (file)
--- a/futatabi/mainwindow.cpp
+++ b/futatabi/mainwindow.cpp
@@ -181,6 +181,8 @@ MainWindow::MainWindow()
        connect(ui->stop_btn, &QPushButton::clicked, this, &MainWindow::stop_clicked);
        ui->stop_btn->setEnabled(false);
 
+       connect(ui->speed_slider, &QAbstractSlider::valueChanged, this, &MainWindow::speed_slider_changed);
+
        connect(ui->playlist_duplicate_btn, &QPushButton::clicked, this, &MainWindow::playlist_duplicate);
 
        connect(ui->playlist_remove_btn, &QPushButton::clicked, this, &MainWindow::playlist_remove);
@@ -624,6 +626,13 @@ void MainWindow::stop_clicked()
        ui->stop_btn->setEnabled(false);
 }
 
+void MainWindow::speed_slider_changed(int percent)
+{
+       float speed = percent / 100.0f;
+       ui->speed_label->setText(QString::fromStdString(to_string(percent) + "%"));
+       live_player->set_master_speed(speed);
+}
+
 void MainWindow::live_player_done()
 {
        playlist_selection_changed();
@@ -1225,6 +1234,21 @@ void MainWindow::switch_camera(unsigned camera_idx)
        });
 }
 
+void MainWindow::set_master_speed(float speed)
+{
+       speed = min(max(speed, 0.1f), 2.0f);
+
+       post_to_main_thread([this, speed] {
+               int percent = lrintf(speed * 100.0f);
+               ui->speed_slider->blockSignals(true);
+               ui->speed_slider->setValue(percent);
+               ui->speed_slider->blockSignals(false);
+               ui->speed_label->setText(QString::fromStdString(to_string(percent) + "%"));
+       });
+
+       live_player->set_master_speed(speed);
+}
+
 void MainWindow::cue_in()
 {
        post_to_main_thread([this] { cue_in_clicked(); });