ipa: libipa: Introduce a Module class template

libipa defines an abstract Algorithm class template that is specialized
by IPA modules. IPA modules then instantiate and manage algorithms
internally, without help from libipa. With ongoing work on tuning data
support for the RkISP1, and future similar work for the IPU3, more code
duplication for algorithms management is expected.

To address this and share code between multiple IPA modules, introduce a
new Module class template that will define and manage top-level concepts
for the IPA module.

The Module class template needs to be specialized with the same types as
the Algorithm class. To avoid manual specialization of both classes,
store the types in the Module class, and replace the template arguments
of the Algorithm class with a single Module argument from which the
other types are retrieved.

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

1 files changed, 30 insertions, 0 deletions

diff --git a/src/ipa/libipa/module.h b/src/ipa/libipa/module.h
new file mode 100644
index 00000000..c4d77812
--- /dev/null
+++ b/src/ipa/libipa/module.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Ideas On Board
+ *
+ * module.h - IPA module
+ */
+
+#pragma once
+
+namespace libcamera {
+
+namespace ipa {
+
+template<typename _Context, typename _FrameContext, typename _Config,
+	 typename _Params, typename _Stats>
+class Module
+{
+public:
+	using Context = _Context;
+	using FrameContext = _FrameContext;
+	using Config = _Config;
+	using Params = _Params;
+	using Stats = _Stats;
+
+	virtual ~Module() {}
+};
+
+} /* namespace ipa */
+
+} /* namespace libcamera */