diff options
Diffstat (limited to 'src/py/libcamera/gen-py-controls.py')
-rwxr-xr-x | src/py/libcamera/gen-py-controls.py | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/py/libcamera/gen-py-controls.py b/src/py/libcamera/gen-py-controls.py new file mode 100755 index 00000000..4c072e60 --- /dev/null +++ b/src/py/libcamera/gen-py-controls.py @@ -0,0 +1,102 @@ +#!/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): + out = '' + + for ctrl in controls: + name, ctrl = ctrl.popitem() + + if ctrl.get('draft'): + ns = 'libcamera::controls::draft::' + container = 'draft' + else: + ns = 'libcamera::controls::' + 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 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]) + + 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.') + args = parser.parse_args(argv[1:]) + + data = open(args.input, 'rb').read() + controls = yaml.safe_load(data)['controls'] + + data = generate_py(controls) + + 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)) |