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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).
# 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.
# 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")
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})
get_filename_component(pgxfile ${pgxfullpath} NAME)
execute_process(
COMMAND ${CMAKE_COMMAND} -E md5sum ${pgxfile}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Temporary
RESULT_VARIABLE res
OUTPUT_VARIABLE output
ERROR_VARIABLE error_output
OUTPUT_STRIP_TRAILING_WHITESPACE # important
)
# Pass the output back to ctest
if(res)
message(SEND_ERROR "md5 could not be computed, it failed with value ${res}. Output was: ${error_output}")
endif()
string(REGEX MATCH "[0-9a-f]+ ${pgxfile}" output_var "${variable}")
if("${output_var}" STREQUAL "${output}")
message(STATUS "equal: [${output_var}] vs [${output}]")
else()
message(SEND_ERROR "not equal: [${output_var}] vs [${output}]")
endif()
endforeach()
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