fluster.sh: detect codecs

With the patchset to support VP8 and MPEG2 in Iris being around the
corner, add a way to detect the codecs supported by the M2M device
instead of relying on Venus vs Iris driver being a key decision point.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

fluster.sh

@@ -8,17 +8,21 @@ then
 	exit 1
 fi
 
-if [ -d /sys/bus/platform/drivers/qcom-iris ] && [ "$(find /sys/bus/platform/drivers/qcom-iris -name "*.video-codec")" != "" ]
+DEV=$(find /sys/bus/platform/devices/ -name "*.video-codec")
+if [ ! -e "$DEV" ]
 then
-	DRV=iris
-elif [ -d /sys/bus/platform/drivers/qcom-venus ] && [ "$(find /sys/bus/platform/drivers/qcom-venus -name "*.video-codec")" != "" ]
+	echo "$0: can't find videoc-codec device"
+	exit 2
+fi
+
+if [ ! -e "$DEV/driver" ]
 then
-	DRV=venus
-else
 	echo "$0: can't detect video driver, check that the device is bound"
 	exit 2
 fi
 
+DRV=$(basename $(readlink "$DEV/driver") | sed -e 's/qcom-//')
+
 MACHINE="$1"
 
 SKIPFILE="$(dirname $0)/${DRV}-${MACHINE}-skip.txt"
@@ -52,11 +56,42 @@ fi
 # Skip the machine
 shift
 
-if [ "$DRV" = "iris" ]
+if [ "$(which v4l2-ctl)" = "" ]
 then
-	CODECS="VP9 H.264 H.265"
-else
-	CODECS="VP9 H.264 H.265 VP8 MPEG2_VIDEO"
+	echo "$0: v4l2-ctl not found, please install v4l-utils"
+	exit 3
+fi
+
+fourcc_to_codec() {
+	case "$1" in
+	H264)	echo "H.264" ;;
+	HEVC)	echo "H.265" ;;
+	VP80)	echo "VP8" ;;
+	VP90)	echo "VP9" ;;
+	MPG2)	echo "MPEG2_VIDEO" ;;
+	*)	;;
+	esac
+}
+
+CODECS=""
+for vid in "$DEV"/video4linux/video*
+do
+	for fourcc in $(v4l2-ctl -d "/dev/$(basename "$vid")" --list-formats-out 2>/dev/null | \
+		sed -n "s/.*'\(....\)'.*compressed.*/\1/p")
+	do
+		codec=$(fourcc_to_codec "$fourcc")
+		[ -n "$codec" ] || continue
+		case " $CODECS " in
+		*" $codec "*)	;;
+		*)		CODECS="${CODECS:+$CODECS }$codec" ;;
+		esac
+	done
+done
+
+if [ -z "$CODECS" ]
+then
+	echo "$0: no supported compressed formats found for $DEV"
+	exit 2
 fi
 
 DECODERS=""