lc-compliance: Add a libcamera compliance tool

Add a compliance tool to ease testing of cameras. In contrast to the
unit-tests under test/ that aims to test the internal components of
libcamera the compliance tool aims to test application use-cases and to
some extent the public API.

This change adds the boilerplate code of a simple framework for the
creation of tests. The tests aim both to demonstrate the tool and to
catch real problems. The tests added are:

 - Test that if one queues exactly N requests to a camera exactly N
   requests are eventually completed.

 - Test that a configured camera can be started and stopped multiple
   times in an attempt to exercise cleanup code paths otherwise not
   often tested with 'cam' for example.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/lc-compliance/simple_capture.h b/src/lc-compliance/simple_capture.h
new file mode 100644
index 00000000..3a6afc53
--- /dev/null
+++ b/src/lc-compliance/simple_capture.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * simple_capture.h - Simple capture helper
+ */
+#ifndef __LC_COMPLIANCE_SIMPLE_CAPTURE_H__
+#define __LC_COMPLIANCE_SIMPLE_CAPTURE_H__
+
+#include <memory>
+
+#include <libcamera/libcamera.h>
+
+#include "../cam/event_loop.h"
+#include "results.h"
+
+class SimpleCapture
+{
+public:
+	Results::Result configure(libcamera::StreamRole role);
+
+protected:
+	SimpleCapture(std::shared_ptr<libcamera::Camera> camera);
+	virtual ~SimpleCapture();
+
+	Results::Result start();
+	Results::Result stop();
+
+	virtual void requestComplete(libcamera::Request *request) = 0;
+
+	EventLoop *loop_;
+
+	std::shared_ptr<libcamera::Camera> camera_;
+	std::unique_ptr<libcamera::FrameBufferAllocator> allocator_;
+	std::unique_ptr<libcamera::CameraConfiguration> config_;
+};
+
+class SimpleCaptureBalanced : public SimpleCapture
+{
+public:
+	SimpleCaptureBalanced(std::shared_ptr<libcamera::Camera> camera);
+
+	Results::Result capture(unsigned int numRequests);
+
+private:
+	int queueRequest(libcamera::Request *request);
+	void requestComplete(libcamera::Request *request) override;
+
+	unsigned int queueCount_;
+	unsigned int captureCount_;
+	unsigned int captureLimit_;
+};
+
+#endif /* __LC_COMPLIANCE_SIMPLE_CAPTURE_H__ */