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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Generate Python bindings controls from YAML
import argparse
import string
import sys
import yaml
def find_common_prefix(strings):
prefix = strings[0]
for string in strings[1:]:
while string[:len(prefix)] != prefix and prefix:
prefix = prefix[:len(prefix) - 1]
if not prefix:
break
return prefix
def generate_py(controls, mode):
out = ''
for ctrl in controls:
name, ctrl = ctrl.popitem()
if ctrl.get('draft'):
ns = 'libcamera::{}::draft::'.format(mode)
container = 'draft'
else:
ns = 'libcamera::{}::'.format(mode)
container = 'controls'
out += f'\t{container}.def_readonly_static("{name}", static_cast<const libcamera::ControlId *>(&{ns}{name}));\n\n'
enum = ctrl.get('enum')
if not enum:
continue
cpp_enum = name + 'Enum'
out += '\tpy::enum_<{}{}>({}, \"{}\")\n'.format(ns, cpp_enum, container, cpp_enum)
if mode == 'controls':
# Adjustments for controls
if name == 'LensShadingMapMode':
prefix = 'LensShadingMapMode'
elif name == 'SceneFlicker':
# If we strip the prefix, we would get '50Hz', which is illegal name
prefix = ''
else:
prefix = find_common_prefix([e['name'] for e in enum])
else:
# Adjustments for properties
prefix = find_common_prefix([e['name'] for e in enum])
for entry in enum:
cpp_enum = entry['name']
py_enum = entry['name'][len(prefix):]
out += '\t\t.value(\"{}\", {}{})\n'.format(py_enum, ns, cpp_enum)
out += '\t;\n\n'
return {'controls': out}
def fill_template(template, data):
template = open(template, 'rb').read()
template = template.decode('utf-8')
template = string.Template(template)
return template.substitute(data)
def main(argv):
# Parse command line arguments
parser = argparse.ArgumentParser()
parser.add_argument('-o', dest='output', metavar='file', type=str,
help='Output file name. Defaults to standard output if not specified.')
parser.add_argument('input', type=str,
help='Input file name.')
parser.add_argument('template', type=str,
help='Template file name.')
parser.add_argument('--mode', type=str, required=True,
help='Mode is either "controls" or "properties"')
args = parser.parse_args(argv[1:])
if args.mode not in ['controls', 'properties']:
print(f'Invalid mode option "{args.mode}"', file=sys.stderr)
return -1
data = open(args.input, 'rb').read()
controls = yaml.safe_load(data)['controls']
data = generate_py(controls, args.mode)
data = fill_template(args.template, data)
if args.output:
output = open(args.output, 'wb')
output.write(data.encode('utf-8'))
output.close()
else:
sys.stdout.write(data)
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
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