libcamera: ipa_module: add IPA shared library module

Implement a class to wrap around an IPA module shared object.

For now, just load a struct IPAModuleInfo with symbol name
ipaModuleInfo from an IPA module .so shared object.

Also provide a public header file including the struct IPAModuleInfo,
structured such that both C and C++ IPA modules are supported.

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

include/libcamera/ipa/ipa_module_info.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * ipa_module_info.h - Image Processing Algorithm module information
+ */
+#ifndef __LIBCAMERA_IPA_MODULE_INFO_H__
+#define __LIBCAMERA_IPA_MODULE_INFO_H__
+
+#ifdef __cplusplus
+namespace libcamera {
+#endif
+
+struct IPAModuleInfo {
+	char name[256];
+	unsigned int version;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern const struct IPAModuleInfo ipaModuleInfo;
+#ifdef __cplusplus
+};
+#endif
+
+#ifdef __cplusplus
+}; /* namespace libcamera */
+#endif
+
+#endif /* __LIBCAMERA_IPA_MODULE_INFO_H__ */

include/libcamera/meson.build

@@ -5,6 +5,7 @@ libcamera_api = files([
     'event_dispatcher.h',
     'event_notifier.h',
     'geometry.h',
+    'ipa/ipa_module_info.h',
     'libcamera.h',
     'object.h',
     'request.h',