codecparsers: vp9statefulparser: Fix the gst_vp9_get_qindex clamp issue.

The alternate quantizer is a delta value and should be int type.
We mark it wrongly as uint, that will make CLAMP (data, 0, 255)
always choose 255 rather than 0 if the data < 0.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2369>

diff --git a/gst-libs/gst/codecs/gstvp9statefulparser.c b/gst-libs/gst/codecs/gstvp9statefulparser.c
index 2c25419..134e104 100644 (file)
--- a/gst-libs/gst/codecs/gstvp9statefulparser.c
+++ b/gst-libs/gst/codecs/gstvp9statefulparser.c
@@ -1137,7 +1137,7 @@ gst_vp9_get_qindex (const GstVp9SegmentationParams * segmentation_params,
 
   if (gst_vp9_seg_feature_active (segmentation_params, segment_id,
           GST_VP9_SEG_LVL_ALT_Q)) {
-    guint data =
+    gint data =
         segmentation_params->feature_data[segment_id][GST_VP9_SEG_LVL_ALT_Q];
 
     if (!segmentation_params->segmentation_abs_or_delta_update)