libcamera: Introduce CameraDevice and USBDevice

Introduce a CameraDevice base class from which the MediaDevice and
USBDevice derive from.

This allows to generalize the PipelineHandler base class implementation
to use a generic 'CameraDevice' type in the later patches.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

3 files changed, 24 insertions, 1 deletions

diff --git a/src/libcamera/camera_device.cpp b/src/libcamera/camera_device.cpp
new file mode 100644
index 00000000..a0ceba0d
--- /dev/null
+++ b/src/libcamera/camera_device.cpp
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2023, Ideas On Board Oy
+ *
+ * camera_device.cpp - Base class for camera devices
+ */
+
+#include "libcamera/internal/camera_device.h"
+
+/**
+ * \file camera_device.h
+ * \brief Base class for camera devices
+ */
+
+namespace libcamera {
+
+/**
+ * \class CameraDevice
+ * \brief Base class for camera devices
+ */
+
+} /* namespace libcamera */
diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
index 2949816b..f9c2dbf2 100644
--- a/src/libcamera/media_device.cpp
+++ b/src/libcamera/media_device.cpp
@@ -63,7 +63,7 @@ LOG_DEFINE_CATEGORY(MediaDevice)
  * populate() before the media graph can be queried.
  */
 MediaDevice::MediaDevice(const std::string &deviceNode)
-	: deviceNode_(deviceNode), valid_(false), acquired_(false)
+	: CameraDevice(), deviceNode_(deviceNode), valid_(false)
 {
 }
 
diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index d5562afc..3a70946a 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -5,6 +5,7 @@ libcamera_sources = files([
     'byte_stream_buffer.cpp',
     'camera.cpp',
     'camera_controls.cpp',
+    'camera_device.cpp',
     'camera_lens.cpp',
     'camera_manager.cpp',
     'camera_sensor.cpp',