android: hal: Add Camera3 HAL

Add libcamera Android Camera HALv3 implementation.

The initial camera HAL implementation supports the LIMITED hardware
level and uses statically defined metadata and camera characteristics.

Add a build option named 'android' and adjust the build system to
selectively compile the Android camera HAL and link it against the
required Android libraries.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/src/android/camera_proxy.h b/src/android/camera_proxy.h
new file mode 100644
index 00000000..da63bfa7
--- /dev/null
+++ b/src/android/camera_proxy.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * camera_proxy.h - Proxy to camera devices
+ */
+#ifndef __ANDROID_CAMERA_PROXY_H__
+#define __ANDROID_CAMERA_PROXY_H__
+
+#include <memory>
+
+#include <hardware/camera3.h>
+
+#include <libcamera/camera.h>
+
+class CameraDevice;
+class ThreadRpc;
+
+class CameraProxy
+{
+public:
+	CameraProxy(unsigned int id, std::shared_ptr<libcamera::Camera> camera);
+	~CameraProxy();
+
+	int open(const hw_module_t *hardwareModule);
+	void close();
+
+	void initialize(const camera3_callback_ops_t *callbacks);
+	const camera_metadata_t *getStaticMetadata();
+	const camera_metadata_t *constructDefaultRequestSettings(int type);
+	int configureStreams(camera3_stream_configuration_t *stream_list);
+	int processCaptureRequest(camera3_capture_request_t *request);
+
+	unsigned int id() const { return id_; }
+	camera3_device_t *camera3Device() { return &camera3Device_; }
+
+private:
+	void threadRpcCall(ThreadRpc &rpcRequest);
+
+	unsigned int id_;
+	CameraDevice *cameraDevice_;
+	camera3_device_t camera3Device_;
+};
+
+#endif /* __ANDROID_CAMERA_PROXY_H__ */