Commit f20770e5 authored by Erik de Castro Lopo's avatar Erik de Castro Lopo
Browse files

Add patch from Earl Chew <earl_chew@yahoo.com> that adds testing for

the replay gain calculations.
parent 2f8b6a03
......@@ -392,6 +392,93 @@ run_metaflac --remove --block-type=VORBIS_COMMENT --dont-use-padding $flacfile
cmp $flacfile metaflac.flac.ok || die "ERROR, $flacfile and metaflac.flac.ok differ"
echo OK
# Replay gain tests - Test the rates which have specific filter table entries
# and verify that harmonics can be processed correctly.
tonegenerator ()
{
awk -- '
BEGIN {
samplerate = '$1';
tone = 1000;
duration = 1;
bitspersample = 24;
samplemidpoint = lshift(1, (bitspersample-1));
samplerange = samplemidpoint - 1;
pi = 4 * atan2(1,1);
for (ix = 0; ix < duration * samplerate; ++ix) {
sample = sin(2 * pi * tone * ix / samplerate);
sample *= samplerange;
sample += samplemidpoint;
sample = int(sample);
for (bx = 0; bx < bitspersample/8; ++bx) {
byte[bx] = sample % 256;
sample /= 256;
}
while (bx--) {
printf("%c", byte[bx]);
}
}
}' /dev/null |
flac --silent \
--endian=big --channels=1 --bps=24 --sample-rate=$1 --sign=unsigned -
}
REPLAYGAIN_FREQ=
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 8000/-12.73"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 11025/-12.93"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 11025/-12.93"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 12000/-12.98"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 16000/-13.27"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 18900/-13.41"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 22050/-13.77"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 24000/-13.82"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 28000/-14.06"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 32000/-14.08"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 36000/-14.12"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 37800/-14.18"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 44100/-14.17"
REPLAYGAIN_FREQ="$REPLAYGAIN_FREQ 48000/-14.16:1:2:4"
for ACTION in $REPLAYGAIN_FREQ ; do
if [ -n "${ACTION##*:*}" ] ; then
HARMONICS=1
else
HARMONICS="${ACTION#*:}"
fi
FREQ="${ACTION%%/*}"
GAIN="${ACTION#*/}"
GAIN="${GAIN%%:*}"
while [ -n "$HARMONICS" ] ; do
MULTIPLE="${HARMONICS%%:*}"
if [ x"$MULTIPLE" = x"$HARMONICS" ] ; then
HARMONICS=
else
HARMONICS="${HARMONICS#*:}"
fi
RATE=$(($MULTIPLE * FREQ))
[ $MULTIPLE -eq 1 -o -n "${REPLAYGAIN_FREQ##* $RATE/*}" ] || break
echo -n "Testing FLAC replaygain $RATE ($FREQ x $MULTIPLE) ... "
tonegenerator $RATE > $flacfile
run_metaflac --add-replay-gain $flacfile
run_metaflac --list $flacfile | grep REPLAYGAIN.*GAIN= |
while read -r REPLAYGAIN ; do
MEASUREDGAIN="${REPLAYGAIN##*=}"
MEASUREDGAIN="${MEASUREDGAIN%% *}"
if [ x"$MEASUREDGAIN" != x"$GAIN" ] ; then
die "ERROR, Expected $GAIN db instead of $REPLAYGAIN"
fi
done
echo OK
done
done
rm -f $testdir/out.flac $testdir/out.meta
exit 0
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