[PATCH 3/5] utils: libtuning: modules: Add skeletal CCM module

[Paul Elder]

Add a skeletal CCM module just so that we can have some CCM tuning
values that we can use to test during development of CCM in the IPAs. As
rkisp1 is the main target, we only add support for rkisp1 for now.

The parameters are mostly copied from the hardcoded values in ctt,
except for the metering modes.

As CCM is called CTK (for crosstalk) in rkisp1, that is the name that
will be used for rkisp1.

Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---
 .../tuning/libtuning/modules/ccm/__init__.py  |  6 ++
 utils/tuning/libtuning/modules/ccm/ccm.py     | 22 ++++++
 utils/tuning/libtuning/modules/ccm/rkisp1.py  | 75 +++++++++++++++++++
 3 files changed, 103 insertions(+)
 create mode 100644 utils/tuning/libtuning/modules/ccm/__init__.py
 create mode 100644 utils/tuning/libtuning/modules/ccm/ccm.py
 create mode 100644 utils/tuning/libtuning/modules/ccm/rkisp1.py

diff --git a/utils/tuning/libtuning/modules/ccm/__init__.py b/utils/tuning/libtuning/modules/ccm/__init__.py
new file mode 100644
index 00000000..a06c356c
--- /dev/null
+++ b/utils/tuning/libtuning/modules/ccm/__init__.py
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (C) 2024, Paul Elder <paul.elder at ideasonboard.com>
+
+from libtuning.modules.ccm.ccm import CCM
+from libtuning.modules.ccm.rkisp1 import CTKRkISP1
diff --git a/utils/tuning/libtuning/modules/ccm/ccm.py b/utils/tuning/libtuning/modules/ccm/ccm.py
new file mode 100644
index 00000000..7ddf0a8c
--- /dev/null
+++ b/utils/tuning/libtuning/modules/ccm/ccm.py
@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (C) 2019, Raspberry Pi Ltd
+# Copyright (C) 2024, Paul Elder <paul.elder at ideasonboard.com>
+
+from ..module import Module
+
+import libtuning as lt
+import libtuning.utils as utils
+
+import numpy as np
+
+class CCM(Module):
+    type = 'ccm'
+    hr_name = 'CCM (Base)'
+    out_name = 'GenericCCM'
+
+    def __init__(self, *,
+                 debug: list):
+        super().__init__()
+
+        self.debug = debug
diff --git a/utils/tuning/libtuning/modules/ccm/rkisp1.py b/utils/tuning/libtuning/modules/ccm/rkisp1.py
new file mode 100644
index 00000000..5a6caea8
--- /dev/null
+++ b/utils/tuning/libtuning/modules/ccm/rkisp1.py
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (C) 2019, Raspberry Pi Ltd
+# Copyright (C) 2024, Paul Elder <paul.elder at ideasonboard.com>
+#
+# rkisp1.py - Ctk module for tuning rkisp1
+
+from .ccm import CCM
+
+import libtuning as lt
+import libtuning.utils as utils
+
+from numbers import Number
+import numpy as np
+
+class CTKRkISP1(CCM):
+    hr_name = 'Crosstalk Correction (RkISP1)'
+    out_name = 'Ctk'
+    # \todo Not sure if this is useful. Probably will remove later.
+    compatible = ['rkisp1']
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    # We don't actually need anything from the config file
+    def validate_config(self, config: dict) -> bool:
+        return True
+
+    def _float_to_fixed_4_7(self, d):
+        mask = 0xf
+        whole = int(d) & mask
+
+        fractional = d % 1
+        frac = 0
+        for i in range(0, 7):
+            fractional *= 2
+            frac <<= 1
+            frac |= int(fractional) & 0x1
+
+        return (whole << 7) | frac
+
+    def _generate_ctms(self) -> dict:
+        ctms = {
+                '2860': [ 2.12089, -0.52461, -0.59629,
+                         -0.85342,  2.80445, -0.95103,
+                         -0.26897, -1.14788,  2.41685 ],
+                '2960': [ 2.26962, -0.54174, -0.72789,
+                         -0.77008,  2.60271, -0.83262,
+                         -0.26036, -1.51254,  2.77289 ],
+                '3603': [ 2.18644, -0.66148, -0.52496,
+                         -0.77828,  2.69474, -0.91645,
+                         -0.25239, -0.83059,  2.08298 ],
+                '4650': [ 2.18174, -0.70887, -0.47287,
+                         -0.70196,  2.76426, -1.06231,
+                         -0.25157, -0.71978,  1.97135 ],
+                '5858': [ 2.32392, -0.88421, -0.43971,
+                         -0.63821,  2.58348, -0.94527,
+                         -0.28541, -0.54112,  1.82653 ],
+                '7580': [ 2.21175, -0.53242, -0.67933,
+                         -0.57875,  3.07922, -1.50047,
+                         -0.27709, -0.73338,  2.01048 ],
+                }
+
+        ret = {}
+        for ct in ctms:
+            ret[ct] = [self._float_to_fixed_4_7(weight) for weight in ctms[ct]]
+        return ret
+
+    def process(self, config: dict, images: list, outputs: dict) -> dict:
+        output = {}
+
+        output['ctms'] = self._generate_ctms()
+        # \todo Debug functionality
+
+        return output
-- 
2.39.2