Move test applications to src/apps/

The cam and qcam test application share code, currently through a crude
hack that references the cam source files directly from the qcam
meson.build file. To prepare for the introduction of hosting that code
in a static library, move all applications to src/apps/.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/apps/qcam/main.cpp

@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * main.cpp - qcam - The libcamera GUI test application
+ */
+
+#include <signal.h>
+#include <string.h>
+
+#include <QApplication>
+#include <QtDebug>
+
+#include <libcamera/camera_manager.h>
+
+#include "../cam/options.h"
+#include "../cam/stream_options.h"
+#include "main_window.h"
+#include "message_handler.h"
+
+using namespace libcamera;
+
+void signalHandler([[maybe_unused]] int signal)
+{
+	qInfo() << "Exiting";
+	qApp->quit();
+}
+
+OptionsParser::Options parseOptions(int argc, char *argv[])
+{
+	StreamKeyValueParser streamKeyValue;
+
+	OptionsParser parser;
+	parser.addOption(OptCamera, OptionString,
+			 "Specify which camera to operate on", "camera",
+			 ArgumentRequired, "camera");
+	parser.addOption(OptHelp, OptionNone, "Display this help message",
+			 "help");
+	parser.addOption(OptRenderer, OptionString,
+			 "Choose the renderer type {qt,gles} (default: qt)",
+			 "renderer", ArgumentRequired, "renderer");
+	parser.addOption(OptStream, &streamKeyValue,
+			 "Set configuration of a camera stream", "stream", true);
+	parser.addOption(OptVerbose, OptionNone,
+			 "Print verbose log messages", "verbose");
+
+	OptionsParser::Options options = parser.parse(argc, argv);
+	if (options.isSet(OptHelp))
+		parser.usage();
+
+	return options;
+}
+
+int main(int argc, char **argv)
+{
+	QApplication app(argc, argv);
+	int ret;
+
+	OptionsParser::Options options = parseOptions(argc, argv);
+	if (!options.valid())
+		return EXIT_FAILURE;
+	if (options.isSet(OptHelp))
+		return 0;
+
+	MessageHandler msgHandler(options.isSet(OptVerbose));
+
+	struct sigaction sa = {};
+	sa.sa_handler = &signalHandler;
+	sigaction(SIGINT, &sa, nullptr);
+
+	CameraManager *cm = new libcamera::CameraManager();
+
+	ret = cm->start();
+	if (ret) {
+		qInfo() << "Failed to start camera manager:"
+			<< strerror(-ret);
+		return EXIT_FAILURE;
+	}
+
+	MainWindow *mainWindow = new MainWindow(cm, options);
+	mainWindow->show();
+	ret = app.exec();
+	delete mainWindow;
+
+	cm->stop();
+	delete cm;
+
+	return ret;
+}