cros: Support the new cros camera API with set_up and tear_down

Implement and expose the symbol and functions that the new cros camera
API requires. Since we don't actually need them, leave them empty.
Update meson accordingly.

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

src/android/cros/camera3_hal.cpp

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * camera3_hal.cpp - cros-specific components of Android Camera HALv3 module
+ */
+
+#include <cros-camera/cros_camera_hal.h>
+
+static void set_up(cros::CameraMojoChannelManagerToken *token)
+{
+}
+
+static void tear_down()
+{
+}
+
+cros::cros_camera_hal_t CROS_CAMERA_EXPORT CROS_CAMERA_HAL_INFO_SYM = {
+	.set_up = set_up,
+	.tear_down = tear_down
+};

src/android/cros/meson.build

@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: CC0-1.0
+
+if get_option('android_platform') != 'cros'
+   subdir_done()
+endif
+
+cros_hal_info_sources = files([
+    'camera3_hal.cpp',
+])
+
+cros_hal_info = static_library('cros_hal_info',
+                               cros_hal_info_sources,
+                               dependencies : dependency('libcros_camera'),
+                               c_args : '-Wno-shadow',
+                               include_directories : android_includes)
+
+libcamera_objects += cros_hal_info.extract_objects('camera3_hal.cpp')

src/android/meson.build

@@ -37,6 +37,8 @@ if android_enabled
     android_deps += [libyuv_dep]
 endif
 
+subdir('cros')
+
 android_hal_sources = files([
     'camera3_hal.cpp',
     'camera_hal_manager.cpp',

src/libcamera/meson.build

@@ -149,6 +149,7 @@ libcamera = shared_library('camera',
                            install : true,
                            link_with : libcamera_link_with,
                            include_directories : includes,
+                           objects : libcamera_objects,
                            build_rpath : '/',
                            dependencies : libcamera_deps)
 

src/meson.build

@@ -11,6 +11,8 @@ else
     ipa_sign_module = false
 endif
 
+libcamera_objects = []
+
 # The 'android' subdir must be processed first, and the build targets
 # are included directly into the libcamera library when this is enabled.
 subdir('android')