openjpeg/tests/nonregression/checkmd5refs.cmake

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# Copyright (c) 2014 Mathieu Malaterre <mathieu.malaterre@voxxl.com>
#
# Redistribution and use is allowed according to the terms of the New
# BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
# check md5 refs
#
# This script will be used to make sure we never introduce a regression on any
# of the nonregression file.
#
# The approach is relatively simple, we compute a md5sum for each of the decode
# file. Anytime the md5sum is different from the reference one, we assume
# something went wrong and simply fails. of course if could happen during the
# course of openjpeg development that the internals are changed that impact the
# decoding process that the output would be bitwise different (while PSNR would
# be kept identical).
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# Another more conventional approach is to store the generated output from
# openjpeg however storing the full generated output is generally useless since
# we do not really care about the exact pixel value, we simply need to known
# when a code change impact output generation. furthermore storing the
# complete generated output file, tends to make the svn:/openjpeg-data really
# big.
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# This script expect two inputs
# REFFILE: Path to the md5sum.txt file
# OUTFILENAME: The name of the generated file we want to check The script will
# check whether a PGX or a PNG file was generated in the test suite (computed
# from OUTFILENAME)
get_filename_component(OUTFILENAME_NAME ${OUTFILENAME} NAME)
string(FIND ${OUTFILENAME_NAME} "." SHORTEST_EXT_POS REVERSE)
string(SUBSTRING ${OUTFILENAME_NAME} 0 ${SHORTEST_EXT_POS} OUTFILENAME_NAME_WE)
file(GLOB globfiles "Temporary/${OUTFILENAME_NAME_WE}*.pgx" "Temporary/${OUTFILENAME_NAME_WE}*.png" "Temporary/${OUTFILENAME_NAME_WE}*.tif")
if(NOT globfiles)
message(SEND_ERROR "Could not find output PGX files: ${OUTFILENAME_NAME_WE}")
endif()
# REFFILE follow what `md5sum -c` would expect as input:
file(READ ${REFFILE} variable)
foreach(pgxfullpath ${globfiles})
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file(MD5 ${pgxfullpath} output)
get_filename_component(pgxfile ${pgxfullpath} NAME)
string(REGEX MATCH "[0-9a-f]+ ${pgxfile}" output_var "${variable}")
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set(output "${output} ${pgxfile}")
if("${output_var}" STREQUAL "${output}")
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message(STATUS "equal: [${output_var}] vs [${output}]")
else()
message(SEND_ERROR "not equal: [${output_var}] vs [${output}]")
endif()
endforeach()