FFmpeg/tests/refcmp-metadata.awk
Tobias Rapp bee01ee2ba fate: add tests for psnr and ssim filter
Metadata filter output is passed through an Awk script comparing floats
against reference values with specified "fuzz" tolerance to account for
architectural differences (e.g. x86-32 vs. x86-64).

Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
2017-09-27 15:58:49 +02:00

65 lines
1.8 KiB
Awk

# Compare metadata filter output containing float value strings to reference
# output data. Returns the whole reference data if delta of each value is below
# threshold, else returns the whole input data.
function abs(val) {
return ((val < 0.0) ? -val : val);
}
function max(val1, val2) {
return ((val1 >= val2) ? val1 : val2);
}
function is_numeric_str(str) {
return (str ~ /^[+-]?[0-9]*\.?[0-9]+$/);
}
BEGIN {
FS = "=";
# check for "fuzz" (threshold) program parameter, else use default
if (fuzz <= 0.0) {
fuzz = 0.1;
}
# check for "ref" (reference file) program parameter
if (ref) {
ref_nr = 0;
while ((getline line < ref) > 0) {
ref_nr++;
ref_lines[ref_nr] = line;
if (split(line, fields) == 2 && is_numeric_str(fields[2])) {
ref_keys[ref_nr] = fields[1];
ref_vals[ref_nr] = fields[2] + 0; # convert to number
}
}
close(ref);
}
delta_max = 0;
result = (ref ? 1 : 0);
}
{
cmp_lines[NR] = $0;
if (NF == 2 && is_numeric_str($2) && ref_vals[NR]) {
val = $2 + 0; # convert to number
delta = abs((val / ref_vals[NR]) - 1);
delta_max = max(delta_max, delta);
result = result && ($1 == ref_keys[NR]) && (delta <= fuzz);
} else {
result = result && ($0 == ref_lines[NR]);
}
}
END {
if (result) {
for (i = 1; i <= ref_nr; i++)
print ref_lines[i];
} else {
for (i = 1; i <= NR; i++)
print cmp_lines[i];
if (NR != ref_nr)
print "[refcmp] lines: " NR " != " ref_nr > "/dev/stderr";
if (delta_max >= fuzz)
print "[refcmp] delta_max: " delta_max " >= " fuzz > "/dev/stderr";
}
}