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authorPaul Elder <paul.elder@ideasonboard.com>2020-06-19 21:53:39 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2020-07-10 16:11:53 +0900
commite37e72c61c1021c1a19e031066c11569f948d9d2 (patch)
treedb10d317c265f7ca3f3c2993e92b9ffbc7b6c53e /test/v4l2_compat/v4l2_compat_test.py
parent323a53c2329fe70a063b2d479b19385d10e0a559 (diff)
tests: v4l2_compat: Add test for v4l2_compat
Test the V4L2 compatibility layer by running v4l2-compliance -s on every /dev/video* device. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'test/v4l2_compat/v4l2_compat_test.py')
-rwxr-xr-xtest/v4l2_compat/v4l2_compat_test.py152
1 files changed, 152 insertions, 0 deletions
diff --git a/test/v4l2_compat/v4l2_compat_test.py b/test/v4l2_compat/v4l2_compat_test.py
new file mode 100755
index 00000000..99b3d5a3
--- /dev/null
+++ b/test/v4l2_compat/v4l2_compat_test.py
@@ -0,0 +1,152 @@
+#!/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
+import re
+import shutil
+import signal
+import subprocess
+import sys
+
+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 print_output_arr(output_arr):
+ print('\n'.join(output_arr))
+
+
+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:
+ print_output_arr(output)
+ print(f'Test for {device} terminated due to signal {signal.Signals(-ret).name}')
+ return TestFail
+
+ result = extract_result(output[-2])
+ if result['failed'] == 0:
+ return TestPass
+
+ # 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:
+ print_output_arr(output)
+ return TestFail
+ return TestPass
+
+ print_output_arr(output)
+ return TestFail
+
+
+def main(argv):
+ parser = argparse.ArgumentParser()
+ parser.add_argument('-a', '--all', action='store_true',
+ help='Test all available cameras')
+ 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
+
+ v4l2_ctl = shutil.which('v4l2-ctl')
+ if v4l2_ctl is None:
+ print('v4l2-ctl is not available')
+ 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
+
+ if not args.all and driver in drivers_tested:
+ continue
+
+ print(f'Testing {device} with {driver} driver... ', end='')
+ ret = test_v4l2_compliance(v4l2_compliance, v4l2_compat, device, driver)
+ if ret == TestFail:
+ failed.append(device)
+ print('failed')
+ else:
+ print('success')
+ drivers_tested[driver] = True
+
+ 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))