X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=main.cpp;h=dcaf2a6936ce7fb84532457c515f36ddcc7ed2e2;hb=96cb6414f85e0ef4d660b7bd56267303e80fcd05;hp=a0d8f669ca083085deaca67119451303cd7226a4;hpb=7017a3bd997cbf5d7c327187afecfecd610bf24d;p=nageru

diff --git a/main.cpp b/main.cpp
index a0d8f66..dcaf2a6 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4,13 +4,14 @@ extern "C" {
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <epoxy/gl.h>
-
+#include <sys/mman.h>
+#include <epoxy/gl.h>  // IWYU pragma: keep
 #include <QApplication>
 #include <QCoreApplication>
 #include <QGL>
 #include <QSize>
 #include <QSurfaceFormat>
+#include <string>
 
 #include "context.h"
 #include "flags.h"
@@ -27,6 +28,7 @@ int main(int argc, char *argv[])
 		// We normally use EGL for zerocopy, but if we use VA against DRM
 		// instead of against X11, we turn it off, and then don't need EGL.
 		setenv("QT_XCB_GL_INTEGRATION", "xcb_egl", 0);
+		using_egl = true;
 	}
 	setlinebuf(stdout);
 	av_register_all();
@@ -40,18 +42,41 @@ int main(int argc, char *argv[])
 	fmt.setProfile(QSurfaceFormat::CoreProfile);
 	fmt.setMajorVersion(3);
 	fmt.setMinorVersion(1);
+
+	// Turn off vsync, since Qt generally gives us at most frame rate
+	// (display frequency) / (number of QGLWidgets active).
+	fmt.setSwapInterval(0);
+
 	QSurfaceFormat::setDefaultFormat(fmt);
 
 	QGLFormat::setDefaultFormat(QGLFormat::fromSurfaceFormat(fmt));
 
 	global_share_widget = new QGLWidget();
+	if (!global_share_widget->isValid()) {
+		fprintf(stderr, "Failed to initialize OpenGL. Nageru needs at least OpenGL 3.1 to function properly.\n");
+		exit(1);
+	}
 
 	MainWindow mainWindow;
-	mainWindow.resize(QSize(1500, 810));
+	mainWindow.resize(QSize(1500, 850));
 	mainWindow.show();
 
 	app.installEventFilter(&mainWindow);  // For white balance color picking.
 
+	// Even on an otherwise unloaded system, it would seem writing the recording
+	// to disk (potentially terabytes of data as time goes by) causes Nageru
+	// to be pushed out of RAM. If we have the right privileges, simply lock us
+	// into memory for better realtime behavior.
+	if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) {
+		perror("mlockall()");
+		fprintf(stderr, "Failed to lock Nageru into RAM. You probably want to\n");
+		fprintf(stderr, "increase \"memlock\" for your user in limits.conf\n");
+		fprintf(stderr, "for better realtime behavior.\n");
+		uses_mlock = false;
+	} else {
+		uses_mlock = true;
+	}
+
 	int rc = app.exec();
 	global_mixer->quit();
 	mainWindow.mixer_shutting_down();