android: Introduce CameraBuffer interface

In order to provide support for different memory backends,
move the MappedCamera3Buffer class definition outside of the
CameraDevice class to its own file and rename it in CameraBuffer.

The interface defined in camera_buffer.h will be implemented by
different backends that will be placed in the src/android/mm
subdirectory.

Provide a first implementation for the 'generic android' backend
which matches the existing one.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/android/camera_buffer.h b/src/android/camera_buffer.h
new file mode 100644
index 00000000..00b06150
--- /dev/null
+++ b/src/android/camera_buffer.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * camera_buffer.h - Frame buffer handling interface definition
+ */
+#ifndef __ANDROID_CAMERA_BUFFER_H__
+#define __ANDROID_CAMERA_BUFFER_H__
+
+#include <hardware/camera3.h>
+
+#include <libcamera/internal/buffer.h>
+
+class CameraBuffer : public libcamera::MappedBuffer
+{
+public:
+	CameraBuffer(const buffer_handle_t camera3buffer, int flags);
+	~CameraBuffer();
+};
+
+#endif /* __ANDROID_CAMERA_BUFFER_H__ */