qcam: Add Qt-based GUI application

qcam is a sample camera GUI application based on Qt. It demonstrates
integration of the Qt event loop with libcamera.

The application lets the user select a camera through the GUI, and then
captures a single stream from the camera and displays it in a window.
Only streams in YUYV formats are supported for now.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
new file mode 100644
index 00000000..5e27a8fd
--- /dev/null
+++ b/src/qcam/main_window.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * main_window.h - qcam - Main application window
+ */
+#ifndef __QCAM_MAIN_WINDOW_H__
+#define __QCAM_MAIN_WINDOW_H__
+
+#include <map>
+
+#include <QMainWindow>
+
+#include <libcamera/camera.h>
+#include <libcamera/stream.h>
+
+#include "../cam/options.h"
+
+using namespace libcamera;
+
+class ViewFinder;
+
+enum {
+	OptCamera = 'c',
+	OptHelp = 'h',
+};
+
+class MainWindow : public QMainWindow
+{
+public:
+	MainWindow(const OptionsParser::Options &options);
+	~MainWindow();
+
+private:
+	int openCamera();
+
+	int startCapture();
+	int configureStreams(Camera *camera, std::set<Stream *> &streams);
+	void stopCapture();
+
+	void requestComplete(Request *request,
+			     const std::map<Stream *, Buffer *> &buffers);
+	int display(Buffer *buffer);
+
+	const OptionsParser::Options &options_;
+
+	std::shared_ptr<Camera> camera_;
+	bool isCapturing_;
+	std::map<Stream *, StreamConfiguration> config_;
+
+	ViewFinder *viewfinder_;
+};
+
+#endif /* __QCAM_MAIN_WINDOW__ */