utils: tuning: libtuning: Implement extensible components of libtuning

Implement the extensible components of libtuning. This includes:
- Parsers, for supporting different types of input config file formats
- Generators, for supporting different types of output tuning file
  formats
- Modules, for supporting different tuning modules for different
  algorithms and platforms

No parsers, generators, or modules are actually implemented. Only the
base classes are implemented.

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

utils/tuning/libtuning/parsers/parser.py

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (C) 2022, Paul Elder <paul.elder@ideasonboard.com>
+#
+# parser.py - Base class for a parser for a specific format of config file
+
+class Parser(object):
+    def __init__(self):
+        pass
+
+    # @brief Parse a config file into a config dict
+    # @details The config dict shall have one key 'general' with a dict value
+    #          for general configuration options, and all other entries shall
+    #          have the module as the key with its configuration options (as a
+    #          dict) as the value. The config dict shall prune entries that are
+    #          for modules that are not in @a modules.
+    # @param config (str) Path to config file
+    # @param modules (list) List of modules
+    # @return (dict, list) Configuration and list of modules to disable
+    def parse(self, config_file: str, modules: list) -> (dict, list):
+        raise NotImplementedError