Add regression test for "sox" format muxer/demuxer.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

tests/lavf-regression.sh

@@ -221,6 +221,10 @@ if [ -n "$do_rso" ] ; then
 do_audio_only rso
 fi
 
+if [ -n "$do_sox" ] ; then
+do_audio_only sox
+fi
+
 # pix_fmt conversions
 
 if [ -n "$do_pixfmt" ] ; then

tests/ref/lavf/sox

@@ -0,0 +1,3 @@
+e6f278256f145b69ed06f35b8d3585c1 *./tests/data/lavf/lavf.sox
+180256 ./tests/data/lavf/lavf.sox
+./tests/data/lavf/lavf.sox CRC=0xf1ae5536