TESTS: check snr in wav pipe test to catch conversion errors

Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>

tests/test-common.sh.in

@@ -44,9 +44,18 @@ audiowmark_cmp()
 
 check_length()
 {
-  local in1=$(audiowmark test-info $1 frames) || die "error detecting length of $1"
-  local in2=$(audiowmark test-info $2 frames) || die "error detecting length of $2"
+  local in1="$($AUDIOWMARK test-info $1 frames)"
+  local in2="$($AUDIOWMARK test-info $2 frames)"
 
   [ "x$in1" != "x" ] || die "length of '$1' could not be detected"
   [ "x$in1" == "x$in2" ] || die "length of '$1' ($in1) and '$2' ($in2) differs"
 }
+
+check_snr()
+{
+  local snr="$($AUDIOWMARK test-snr $1 $2)"
+  echo >&2 "==== snr of $1 and $2 is $snr (expected $3) ===="
+  [ "x$snr" != "x" ] || die "snr of '$1' and '$2' could not be detected"
+  [ "x$3" != "x" ] || die "need snr bound"
+  awk "BEGIN {exit !($snr >= $3)}" || die "snr of '$1' and '$2' is worse than $3"
+}

tests/wav-pipe-test.sh

@@ -13,13 +13,16 @@ do
 
   [ "x$BITS" == "x$(audiowmark test-info $IN_WAV bit_depth)" ] || die "generated input bit depth is not correct"
 
-  cat $IN_WAV   | audiowmark_add --test-key 1 --format wav-pipe - - $TEST_MSG > $OUT1_WAV || die "watermark from pipe failed"
-  cat $OUT1_WAV | audiowmark_add --test-key 2 --format wav-pipe - - $TEST_MSG > $OUT2_WAV || die "watermark from pipe failed"
-  cat $OUT2_WAV | audiowmark_add --test-key 3 --format wav-pipe - - $TEST_MSG > $OUT3_WAV || die "watermark from pipe failed"
+  cat $IN_WAV   | audiowmark_add --test-key 1 --test-no-limiter --format wav-pipe - - $TEST_MSG > $OUT1_WAV || die "watermark from pipe failed"
+  cat $OUT1_WAV | audiowmark_add --test-key 2 --test-no-limiter --format wav-pipe - - $TEST_MSG > $OUT2_WAV || die "watermark from pipe failed"
+  cat $OUT2_WAV | audiowmark_add --test-key 3 --test-no-limiter --format wav-pipe - - $TEST_MSG > $OUT3_WAV || die "watermark from pipe failed"
 
   check_length $IN_WAV $OUT1_WAV
   check_length $IN_WAV $OUT2_WAV
   check_length $IN_WAV $OUT3_WAV
+  check_snr $IN_WAV $OUT1_WAV 32
+  check_snr $IN_WAV $OUT2_WAV 29
+  check_snr $IN_WAV $OUT3_WAV 27
 
   audiowmark_cmp --expect-matches 0 $OUT3_WAV $TEST_MSG
   audiowmark_cmp --expect-matches 5 --test-key 1 $OUT3_WAV $TEST_MSG