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#!/usr/bin/env python3
# SPDX-License-Identifier: Apache-2.0
# -----------------------------------------------------------------------------
# Copyright 2021-2022 Arm Limited
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# -----------------------------------------------------------------------------
"""
The ``astc_quality_test`` utility provides a tool to sweep quality settings.
"""
import numpy as np
import re
import subprocess as sp
import sys
def get_psnr_pattern():
return r"\s*PSNR \(LDR-RGB\):\s*([0-9.]*) dB"
def get_coding_rate_pattern():
return r"\s*Coding rate:\s*([0-9.]*) MT/s"
def parse_output(output):
# Regex pattern for image quality
patternPSNR = re.compile(get_psnr_pattern())
patternCRate = re.compile(get_coding_rate_pattern())
# Extract results from the log
runPSNR = None
runCRate = None
for line in output:
match = patternPSNR.match(line)
if match:
runPSNR = float(match.group(1))
match = patternCRate.match(line)
if match:
runCRate = float(match.group(1))
assert runPSNR is not None, "No coding PSNR found"
assert runCRate is not None, "No coding rate found"
return (runPSNR, runCRate)
def execute(command):
"""
Run a subprocess with the specified command.
Args:
command (list(str)): The list of command line arguments.
Returns:
list(str): The output log (stdout) split into lines.
"""
try:
result = sp.run(command, stdout=sp.PIPE, stderr=sp.PIPE,
check=True, universal_newlines=True)
except (OSError, sp.CalledProcessError):
print("ERROR: Test run failed")
print(" + %s" % " ".join(command))
qcommand = ["\"%s\"" % x for x in command]
print(" + %s" % ", ".join(qcommand))
sys.exit(1)
return result.stdout.splitlines()
def main():
"""
The main function.
Returns:
int: The process return code.
"""
for block in ("4x4", "5x5", "6x6", "8x8", "10x10"):
for quality in range (0, 101, 2):
resultsQ = []
resultsS = []
if (quality < 40):
repeats = 20
elif (quality < 75):
repeats = 10
else:
repeats = 5
for _ in range(0, repeats):
command = [
"./bin/astcenc-avx2",
"-tl",
"./Test/Images/Kodak/LDR-RGB/ldr-rgb-kodak23.png",
"/dev/null",
block,
"%s" % quality,
"-silent"
]
stdout = execute(command)
psnr, mts = parse_output(stdout)
resultsQ.append(psnr)
resultsS.append(mts)
print("%s, %u, %0.3f, %0.3f" % (block, quality, np.mean(resultsS), np.mean(resultsQ)))
return 0
if __name__ == "__main__":
sys.exit(main())
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