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#!/usr/bin/env python3
# Fluster - testing framework for decoders conformance
# Copyright (C) 2020-2025, Fluendo, S.A.
# Author: Ruben Sanchez Sanchez <rsanchez@fluendo.com>, Fluendo, S.A.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation, either version 3
# of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <https://www.gnu.org/licenses/>.
import argparse
import multiprocessing
import os
import sys
import urllib
from html.parser import HTMLParser
from typing import Dict, List, Optional, Tuple
from urllib.parse import urljoin
sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
from fluster import utils
from fluster.codec import Codec, OutputFormat
from fluster.test_suite import TestSuite
from fluster.test_vector import TestVector
BASE_URL = "https://standards.iso.org/"
URL_MPEG2 = BASE_URL + "ittf/PubliclyAvailableStandards/ISO_IEC_13818-4_2004_Conformance_Testing/Video/bitstreams/"
GZ_EXT = "gz"
GZ_EXCLUDES = [".trace.gz", ".log.gz", "ps.gz", ".TRACE.gz", ".rtf.gz", ".decoded.gz", "mpeg_target_practice.mpg.gz"]
BITSTREAM_EXTS = [
".bits",
".m2v",
".bit",
".mpeg",
".bs",
".new",
".stream16v2",
".long",
".4f",
".mpg",
".bin",
"gi_stream",
"bit_stream",
".BITS",
]
class HREFParser(HTMLParser):
def __init__(self) -> None:
super().__init__()
self.links: List[str] = []
def error(self, message: str) -> None:
print(message)
def handle_starttag(self, tag: str, attrs: List[Tuple[str, Optional[str]]]) -> None:
if tag == "a":
for name, value in attrs:
if name == "href" and value:
if not value.startswith("javascript") and not value.startswith("mailto"):
full_url = urljoin(BASE_URL, value)
self.links.append(full_url)
class MPEG2VIDEOGenerator:
"""Generates a test suite from the conformance bitstreams"""
def __init__(
self, name: str, suite_name: str, codec: Codec, description: str, site: str, use_ffprobe: bool = False
):
self.name = name
self.suite_name = suite_name
self.codec = codec
self.description = description
self.site = site
self.use_ffprobe = use_ffprobe
def generate(self, download: bool, jobs: int) -> None:
"""Generates the test suite and downloads bitstreams"""
absolute_dest_dir = os.path.dirname(os.path.abspath(__file__))
absolute_resources_dir = os.path.join(absolute_dest_dir, "resources", self.name)
output_filepath = os.path.join(self.suite_name + ".json")
test_suite = TestSuite(
output_filepath,
absolute_resources_dir,
self.suite_name,
self.codec,
self.description,
{},
)
print(f"Download list of bitstreams from {self.site + self.name}")
main_links = self.get_files_in_directory(self.site + self.name)
for main_link in main_links:
sub_directory_links = self.get_gz_files_in_directory(main_link)
for file_url in sub_directory_links:
file_url_basename = os.path.basename(file_url)
name = os.path.splitext(file_url_basename)[0]
file_input = f"{name}.bin"
name = os.path.splitext(name)[0]
if "bit_stream" in name or "conf4" in name:
parent_dir = os.path.basename(os.path.dirname(file_url))
name = f"{parent_dir}_{name}"
test_vector = TestVector(name, file_url, "__skip__", file_input, OutputFormat.UNKNOWN, "")
test_suite.test_vectors[name] = test_vector
if download:
test_suite.download(
jobs=jobs,
out_dir=test_suite.resources_dir,
verify=False,
extract_all=True,
keep_file=True,
)
for test_vector in test_suite.test_vectors.values():
dest_dir = os.path.join(test_suite.resources_dir, test_suite.name, test_vector.name)
dest_path = os.path.join(dest_dir, os.path.basename(test_vector.source))
test_vector.input_file = str(utils.find_by_ext(dest_dir, BITSTREAM_EXTS))
absolute_input_path = test_vector.input_file
test_vector.input_file = test_vector.input_file.replace(
os.path.join(test_suite.resources_dir, test_suite.name, test_vector.name) + os.sep,
"",
)
if not test_vector.input_file:
raise Exception(f"Bitstream file not found in {dest_dir}")
test_vector.source_checksum = utils.file_checksum(dest_path)
if self.use_ffprobe:
ffprobe = utils.normalize_binary_cmd("ffprobe")
command = [
ffprobe,
"-v",
"error",
"-select_streams",
"v:0",
"-show_entries",
"stream=pix_fmt",
"-of",
"default=nokey=1:noprint_wrappers=1",
absolute_input_path,
]
result = utils.run_command_with_output(command).splitlines()
pix_fmt = result[0]
try:
test_vector.output_format = OutputFormat[pix_fmt.upper()]
except KeyError as key_err:
exceptions: Dict[str, OutputFormat] = {}
if test_vector.name in exceptions.keys():
test_vector.output_format = exceptions[test_vector.name]
else:
raise key_err
absolute_output_filepath = os.path.join(absolute_dest_dir, output_filepath)
test_suite.to_json_file(absolute_output_filepath)
print("Generate new test suite: " + test_suite.name + ".json")
@staticmethod
def get_files_in_directory(directory_url: str) -> List[str]:
"""Find main directories"""
hparser = HREFParser()
with urllib.request.urlopen(directory_url) as resp:
data = str(resp.read())
hparser.feed(data)
links: List[str] = []
for link in hparser.links:
if not link.endswith("/") and directory_url in link:
links.append(link)
return links
@staticmethod
def get_gz_files_in_directory(directory_url: str) -> List[str]:
"""Recursively fetches .gz files from subdirectories"""
gz_links: List[str] = []
links: List[str] = []
hparser = HREFParser()
with urllib.request.urlopen(directory_url) as resp:
data = str(resp.read())
hparser.feed(data)
for link in hparser.links:
if not link.endswith("/") and directory_url in link:
links.append(link)
for sub_link in links:
full_url = urljoin(BASE_URL, sub_link)
try:
with urllib.request.urlopen(full_url) as resp:
sub_data = str(resp.read())
sub_hparser = HREFParser()
sub_hparser.feed(sub_data)
for link in sub_hparser.links:
if link.endswith(GZ_EXT) and not any(link.endswith(ext) for ext in GZ_EXCLUDES):
gz_links.append(link)
except Exception as e:
print(f"Error accessing {full_url}: {e}")
return gz_links
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument(
"--skip-download",
help="skip extracting tarball",
action="store_true",
default=False,
)
parser.add_argument(
"-j",
"--jobs",
help="number of parallel jobs to use. 2x logical cores by default",
type=int,
default=2 * multiprocessing.cpu_count(),
)
args = parser.parse_args()
generator = MPEG2VIDEOGenerator(
"422-profile",
"MPEG2_VIDEO-422",
Codec.MPEG2_VIDEO,
"ISO IEC 13818-4 MPEG2 video 422 profile test suite",
URL_MPEG2,
True,
)
generator.generate(not args.skip_download, args.jobs)
generator = MPEG2VIDEOGenerator(
"main-profile",
"MPEG2_VIDEO-MAIN",
Codec.MPEG2_VIDEO,
"ISO IEC 13818-4 MPEG2 video main profile test suite",
URL_MPEG2,
True,
)
generator.generate(not args.skip_download, args.jobs)
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