1 files changed, 130 insertions, 0 deletions
diff --git a/utils/raspberrypi/ctt/ctt_pretty_print_json.py b/utils/raspberrypi/ctt/ctt_pretty_print_json.py
new file mode 100755
index 00000000..a4cae62d
--- /dev/null
+++ b/utils/raspberrypi/ctt/ctt_pretty_print_json.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright 2022 Raspberry Pi Ltd
+#
+# Script to pretty print a Raspberry Pi tuning config JSON structure in
+# version 2.0 and later formats.
+
+import argparse
+import json
+import textwrap
+
+
+class Encoder(json.JSONEncoder):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.indentation_level = 0
+        self.hard_break = 120
+        self.custom_elems = {
+            'weights': 15,
+            'table': 16,
+            'luminance_lut': 16,
+            'ct_curve': 3,
+            'ccm': 3,
+            'lut_rx': 9,
+            'lut_bx': 9,
+            'lut_by': 9,
+            'lut_ry': 9,
+            'gamma_curve': 2,
+            'y_target': 2,
+            'prior': 2,
+            'tonemap': 2
+        }
+
+    def encode(self, o, node_key=None):
+        if isinstance(o, (list, tuple)):
+            # Check if we are a flat list of numbers.
+            if not any(isinstance(el, (list, tuple, dict)) for el in o):
+                s = ', '.join(json.dumps(el) for el in o)
+                if node_key in self.custom_elems.keys():
+                    # Special case handling to specify number of elements in a row for tables, ccm, etc.
+                    self.indentation_level += 1
+                    sl = s.split(', ')
+                    num = self.custom_elems[node_key]
+                    chunk = [self.indent_str + ', '.join(sl[x:x + num]) for x in range(0, len(sl), num)]
+                    t = ',\n'.join(chunk)
+                    self.indentation_level -= 1
+                    output = f'\n{self.indent_str}[\n{t}\n{self.indent_str}]'
+                elif len(s) > self.hard_break - len(self.indent_str):
+                    # Break a long list with wraps.
+                    self.indentation_level += 1
+                    t = textwrap.fill(s, self.hard_break, break_long_words=False,
+                                      initial_indent=self.indent_str, subsequent_indent=self.indent_str)
+                    self.indentation_level -= 1
+                    output = f'\n{self.indent_str}[\n{t}\n{self.indent_str}]'
+                else:
+                    # Smaller lists can remain on a single line.
+                    output = f' [ {s} ]'
+                return output
+            else:
+                # Sub-structures in the list case.
+                self.indentation_level += 1
+                output = [self.indent_str + self.encode(el) for el in o]
+                self.indentation_level -= 1
+                output = ',\n'.join(output)
+                return f' [\n{output}\n{self.indent_str}]'
+
+        elif isinstance(o, dict):
+            self.indentation_level += 1
+            output = []
+            for k, v in o.items():
+                if isinstance(v, dict) and len(v) == 0:
+                    # Empty config block special case.
+                    output.append(self.indent_str + f'{json.dumps(k)}: {{ }}')
+                else:
+                    # Only linebreak if the next node is a config block.
+                    sep = f'\n{self.indent_str}' if isinstance(v, dict) else ''
+                    output.append(self.indent_str + f'{json.dumps(k)}:{sep}{self.encode(v, k)}')
+            output = ',\n'.join(output)
+            self.indentation_level -= 1
+            return f'{{\n{output}\n{self.indent_str}}}'
+
+        else:
+            return ' ' + json.dumps(o)
+
+    @property
+    def indent_str(self) -> str:
+        return ' ' * self.indentation_level * self.indent
+
+    def iterencode(self, o, **kwargs):
+        return self.encode(o)
+
+
+def pretty_print(in_json: dict, custom_elems={}) -> str:
+
+    if 'version' not in in_json or \
+       'target' not in in_json or \
+       'algorithms' not in in_json or \
+       in_json['version'] < 2.0:
+        raise RuntimeError('Incompatible JSON dictionary has been provided')
+
+    encoder = Encoder(indent=4, sort_keys=False)
+    encoder.custom_elems |= custom_elems
+    return encoder.encode(in_json) #json.dumps(in_json, cls=Encoder, indent=4, sort_keys=False)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter, description=
+                    'Prettify a version 2.0 camera tuning config JSON file.')
+    parser.add_argument('-t', '--target', type=str, help='Target platform', choices=['pisp', 'vc4'], default='vc4')
+    parser.add_argument('input', type=str, help='Input tuning file.')
+    parser.add_argument('output', type=str, nargs='?',
+                        help='Output converted tuning file. If not provided, the input file will be updated in-place.',
+                        default=None)
+    args = parser.parse_args()
+
+    with open(args.input, 'r') as f:
+        in_json = json.load(f)
+
+    if args.target == 'pisp':
+        from ctt_pisp import grid_size
+    elif args.target == 'vc4':
+        from ctt_vc4 import grid_size
+
+    out_json = pretty_print(in_json, custom_elems={'table': grid_size[0], 'luminance_lut': grid_size[0]})
+
+    with open(args.output if args.output is not None else args.input, 'w') as f:
+        f.write(out_json)