#!/usr/bin/env python3 # SPDX-License-Identifier: GPL-2.0-or-later # Copyright (C) 2020, Google Inc. # # Author: Paul Elder <paul.elder@ideasonboard.com> # # v4l2_compat_test.py - Test the V4L2 compatibility layer import argparse import glob import os from packaging import version import re import shutil import signal import subprocess import sys MIN_V4L_UTILS_VERSION = version.parse("1.21.0") TestPass = 0 TestFail = -1 TestSkip = 77 supported_pipelines = [ 'bcm2835-isp', 'uvcvideo', 'vimc', ] def grep(exp, arr): return [s for s in arr if re.search(exp, s)] def run_with_stdout(*args, env={}): try: with open(os.devnull, 'w') as devnull: output = subprocess.check_output(args, env=env, stderr=devnull) ret = 0 except subprocess.CalledProcessError as err: output = err.output ret = err.returncode return ret, output.decode('utf-8').split('\n') def extract_result(result): res = result.split(', ') ret = {} ret['total'] = int(res[0].split(': ')[-1]) ret['succeeded'] = int(res[1].split(': ')[-1]) ret['failed'] = int(res[2].split(': ')[-1]) ret['warnings'] = int(res[3].split(': ')[-1]) ret['device'] = res[0].split()[4].strip(':') ret['driver'] = res[0].split()[2] return ret def test_v4l2_compliance(v4l2_compliance, v4l2_compat, device, base_driver): ret, output = run_with_stdout(v4l2_compliance, '-s', '-d', device, env={'LD_PRELOAD': v4l2_compat}) if ret < 0: output.append(f'Test for {device} terminated due to signal {signal.Signals(-ret).name}') return TestFail, output result = extract_result(output[-2]) if result['failed'] == 0: return TestPass, output # vimc will fail s_fmt because it only supports framesizes that are # multiples of 3 if base_driver == 'vimc' and result['failed'] == 1: failures = grep('fail', output) if re.search('S_FMT cannot handle an invalid format', failures[0]) is None: return TestFail, output return TestPass, output return TestFail, output def main(argv): parser = argparse.ArgumentParser() parser.add_argument('-a', '--all', action='store_true', help='Test all available cameras') parser.add_argument('-v', '--verbose', action='store_true', help='Make the output verbose') parser.add_argument('v4l2_compat', type=str, help='Path to v4l2-compat.so') args = parser.parse_args(argv[1:]) v4l2_compat = args.v4l2_compat v4l2_compliance = shutil.which('v4l2-compliance') if v4l2_compliance is None: print('v4l2-compliance is not available') return TestSkip ret, out = run_with_stdout(v4l2_compliance, '--version') if ret != 0 or version.parse(out[0].split()[1].replace(',', '')) < MIN_V4L_UTILS_VERSION: print('v4l2-compliance version >= 1.21.0 required') return TestSkip v4l2_ctl = shutil.which('v4l2-ctl') if v4l2_ctl is None: print('v4l2-ctl is not available') return TestSkip ret, out = run_with_stdout(v4l2_ctl, '--version') if ret != 0 or version.parse(out[0].split()[-1]) < MIN_V4L_UTILS_VERSION: print('v4l2-ctl version >= 1.21.0 required') return TestSkip dev_nodes = glob.glob('/dev/video*') if len(dev_nodes) == 0: print('no video nodes available to test with') return TestSkip failed = [] drivers_tested = {} for device in dev_nodes: ret, out = run_with_stdout(v4l2_ctl, '-D', '-d', device, env={'LD_PRELOAD': v4l2_compat}) if ret < 0: failed.append(device) print(f'v4l2-ctl failed on {device} with v4l2-compat') continue driver = grep('Driver name', out)[0].split(':')[-1].strip() if driver != "libcamera": continue ret, out = run_with_stdout(v4l2_ctl, '-D', '-d', device) if ret < 0: failed.append(device) print(f'v4l2-ctl failed on {device} without v4l2-compat') continue driver = grep('Driver name', out)[0].split(':')[-1].strip() if driver not in supported_pipelines: continue # TODO: Add kernel version check when vimc supports scaling if driver == "vimc": continue if not args.all and driver in drivers_tested: continue print(f'Testing {device} with {driver} driver... ', end='') ret, msg = test_v4l2_compliance(v4l2_compliance, v4l2_compat, device, driver) if ret == TestFail: failed.append(device) print('failed') else: print('success') if ret == TestFail or args.verbose: print('\n'.join(msg)) drivers_tested[driver] = True if len(drivers_tested) == 0: print(f'No compatible drivers found') return TestSkip if len(failed) > 0: print(f'Failed {len(failed)} tests:') for device in failed: print(f'- {device}') return TestPass if not failed else TestFail if __name__ == '__main__': sys.exit(main(sys.argv))