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# Copyright (c) 2023, ETH Zurich and UNC Chapel Hill.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
# its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import re
import argparse
import requests
from lxml.html import soupparser
MAX_REQUEST_TRIALS = 10
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument("--lib_path", required=True)
args = parser.parse_args()
return args
def request_trial(func, *args, **kwargs):
for i in range(MAX_REQUEST_TRIALS):
try:
response = func(*args, **kwargs)
except:
continue
else:
return response
raise SystemError
def main():
args = parse_args()
##########################################################################
# Header file
##########################################################################
with open(args.lib_path + ".h", "w") as f:
f.write("#include <vector>\n")
f.write("#include <string>\n")
f.write("#include <unordered_map>\n\n")
f.write("// { make1 : ({ model1 : sensor-width in mm }, ...), ... }\n")
f.write(
"typedef std::vector<std::pair<std::string, float>> make_specs_t;\n"
)
f.write(
"typedef std::unordered_map<std::string, make_specs_t> camera_specs_t;;\n\n"
)
f.write("camera_specs_t InitializeCameraSpecs();\n\n")
##########################################################################
# Source file
##########################################################################
makes_response = requests.get("http://www.digicamdb.com")
makes_tree = soupparser.fromstring(makes_response.text)
makes_node = makes_tree.find('.//select[@id="select_brand"]')
makes = [b.attrib["value"] for b in makes_node.iter("option")]
with open(args.lib_path + ".cc", "w") as f:
f.write("camera_specs_t InitializeCameraSpecs() {\n")
f.write(" camera_specs_t specs;\n\n")
for make in makes:
f.write(" {\n")
f.write(
' auto& make_specs = specs["%s"];\n'
% make.lower().replace(" ", "")
)
models_response = request_trial(
requests.post,
"http://www.digicamdb.com/inc/ajax.php",
data={"b": make, "role": "header_search"},
)
models_tree = soupparser.fromstring(models_response.text)
models_code = ""
num_models = 0
for model_node in models_tree.iter("option"):
model = model_node.attrib.get("value")
model_name = model_node.text
if model is None:
continue
url = "http://www.digicamdb.com/specs/{0}_{1}".format(
make, model
)
specs_response = request_trial(requests.get, url)
specs_tree = soupparser.fromstring(specs_response.text)
for spec in specs_tree.findall('.//td[@class="info_key"]'):
if spec.text.strip() == "Sensor:":
sensor_text = spec.find("..").find(
'./td[@class="bold"]'
)
sensor_text = sensor_text.text.strip()
m = re.match(".*?([\d.]+) x ([\d.]+).*?", sensor_text)
sensor_width = m.group(1)
data = (
model_name.lower().replace(" ", ""),
float(sensor_width.replace(" ", "")),
)
models_code += (
' make_specs.emplace_back("%s", %.4ff);\n' % data
)
print(make, model_name)
print(" ", sensor_text)
num_models += 1
f.write(" make_specs.reserve(%d);\n" % num_models)
f.write(models_code)
f.write(" }\n\n")
f.write(" return specs;\n")
f.write("}\n")
if __name__ == "__main__":
main()
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