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, 34 insertions, 0 deletions

diff --git a/src/qcam/viewfinder.h b/src/qcam/viewfinder.h
new file mode 100644
index 00000000..df490169
--- /dev/null
+++ b/src/qcam/viewfinder.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * viewfinder.h - qcam - Viewfinder
+ */
+#ifndef __QCAM_VIEWFINDER_H__
+#define __QCAM_VIEWFINDER_H__
+
+#include <QLabel>
+
+#include "format_converter.h"
+
+class QImage;
+
+class ViewFinder : public QLabel
+{
+public:
+	ViewFinder(QWidget *parent);
+
+	int setFormat(unsigned int format, unsigned int width,
+		      unsigned int height);
+	void display(const unsigned char *rgb);
+
+private:
+	unsigned int format_;
+	unsigned int width_;
+	unsigned int height_;
+
+	FormatConverter converter_;
+	QImage *image_;
+};
+
+#endif /* __QCAM_VIEWFINDER__ */