Add gapk testsuit

This testsuite takes a PCM auidio file and encodes from it every
supported format, and compares that output with a known sample (from an
earlier, trusted version of gakp, shipped as part of this project).

I then re-decodes this file to PCM and also compares that with a shipped
reference re-decode.

test/common.sh

@@ -0,0 +1,13 @@
+# directory containing the reference files for comparing against
+REFDIR=./ref-files
+
+if [ -f ../src/gapk ]; then
+	GAPK=../src/gapk
+elif [ -f `which gapk` ]; then
+	GAPK=`whiich gapk`
+else
+	exit 1
+fi
+echo Using gapk found at $GAPK
+
+FORMATS="amr-efr gsm racal-hr racal-fr racal-efr ti-hr ti-fr ti-efr rtp-efr rtp-hr-etsi rtp-hr-ietf"

test/play_all_formats.sh

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+#!/bin/sh
+OUTDIR=/tmp
+INFILE=$1
+
+. ./common.sh
+
+for f in $FORMATS; do
+	BASE=`basename $INFILE`
+	PLAYFILE=$OUTDIR/$BASE.$f
+	echo
+	echo Format $f: Playing back $PLAYFILE
+	echo $GAPK -f $f -i $PLAYFILE -g rawpcm-s16le -A default
+	$GAPK -f $f -i $PLAYFILE -g rawpcm-s16le -A default
+done

test/test_all_formats.sh

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+#!/bin/sh
+
+
+# This script generates test data for all formats by doing the
+# following:
+#  * encode the user-specified PCM file into each format
+#  * re-decode that format back to PCM
+#
+# Use this to generate test files that are to be shipped together with
+# gapk.   Always use the 
+
+
+# directory in which the temporary output is stored
+OUTDIR=/tmp
+
+# name of the input s16le file to use for encoding and re-decoding
+INFILE=$1
+
+# source some common parameters
+. ./common.sh
+
+RETVAL=0
+
+for f in $FORMATS; do
+	BASE=`basename $INFILE`
+	OUTFILE=$OUTDIR/$BASE.$f
+	echo Format $f: Encoding $INFILE to $OUTFILE
+	$GAPK -f rawpcm-s16le -i $INFILE -g $f -o $OUTFILE
+
+	# compare with reference
+	diff $OUTFILE $REFDIR/`basename $OUTFILE`
+	if [ $? -ne 0 ]; then
+		echo "===> FAIL"
+		RETVAL=1
+	else
+		echo "===> PASS"
+	fi
+	echo
+
+	DECFILE=$OUTFILE.s16
+	echo Format $f: Decoding $OUTFILE to $DECFILE
+	$GAPK -f $f -i $OUTFILE -g rawpcm-s16le -o $DECFILE
+
+	# compare with reference
+	diff $DECFILE $REFDIR/`basename $DECFILE`
+	if [ $? -ne 0 ]; then
+		echo "===> FAIL"
+		RETVAL=1
+	else
+		echo "===> PASS"
+	fi
+	echo
+done
+
+echo -n "Overall Verdict: "
+if [ $RETVAL -ne 0 ]; then
+	echo "FAIL"
+else
+	echo "PASS"
+fi
+
+exit $RETVAL

test/update_ref_files.sh

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+#!/bin/sh
+
+# This script re-generates the reference data shipped together with
+# gapk. To be used by gapk maintainers only.
+
+. ./common.sh
+
+INFILE=$1
+OUTDIR=$REFDIR
+
+
+for f in $FORMATS; do
+	BASE=`basename $INFILE`
+	OUTFILE=$OUTDIR/$BASE.$f
+	echo
+	echo Format $f: Encoding $INFILE to $OUTFILE
+	$GAPK -f rawpcm-s16le -i $INFILE -g $f -o $OUTFILE
+
+	DECFILE=$OUTFILE.s16
+	echo Format $f: Decoding $OUTFILE to $DECFILE
+	$GAPK -f $f -i $OUTFILE -g rawpcm-s16le -o $DECFILE
+done