Test-case: Add to check-alsabat.sh additional audio test

This patch adds run of check_wav_file_snr.m script for the
alsabat capture file to analyze with STFT spectra the audio
quality.

A drop in signal-to-noise ratio in a single FFT indicates presence
of glitch. A low SNR result triggers run of additional glitch
periodicity finder.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

test-case/check-alsabat.sh

@@ -19,7 +19,8 @@
 rm -f /tmp/bat.wav.*
 
 # shellcheck source=case-lib/lib.sh
-source "$(dirname "${BASH_SOURCE[0]}")"/../case-lib/lib.sh
+TESTDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+source "$TESTDIR/case-lib/lib.sh"
 
 OPT_NAME['p']='pcm_p'     	OPT_DESC['p']='pcm for playback. Example: hw:0,0'
 OPT_HAS_ARG['p']=1          	OPT_VAL['p']=''
@@ -95,6 +96,20 @@ function __upload_wav_file
     done
 }
 
+function check_wav_file_snr
+{
+    for file in /tmp/bat.wav.*
+    do
+	if test -s "$file"; then
+	    dlogi "Checking wav file $file"
+	    cd "$TESTDIR"/tools
+	    octave --silent --no-gui --eval "check_wav_file_snr('$file', $frequency, '$LOG_ROOT/')" || {
+		die "Error: Script check_wav_file_snr.m found issues in $file"
+	    }
+	fi
+    done
+}
+
 # check the PCMs before alsabat test
 dlogi "check the PCMs before alsabat test"
 aplay   -Dplug$pcm_p -d 1 /dev/zero -q || die "Failed to play on PCM: $pcm_p"
@@ -119,4 +134,6 @@ alsabat -C$pcm_c -c $channel_c -r $rate -f $format -F $frequency -k $sigmak || {
         exit 1
 }
 
+check_wav_file_snr
+
 wait $playPID