msdk: return a right pointer for VUYA format

The first channel in memory is V for VUYA format, note
GST_VIDEO_FORMAT_VUYA is mapped to MFX_FOURCC_AYUV in this plugin

diff --git a/sys/msdk/gstmsdksystemmemory.c b/sys/msdk/gstmsdksystemmemory.c
index 336e83f..62f5c8f 100644 (file)
--- a/sys/msdk/gstmsdksystemmemory.c
+++ b/sys/msdk/gstmsdksystemmemory.c
@@ -217,7 +217,11 @@ gst_msdk_system_memory_map_full (GstMemory * base_mem, GstMapInfo * info,
     return NULL;
   }
 
-  return mem->surface->Data.Y;
+  /* The first channel in memory is V for MFX_FOURCC_AYUV (GST_VIDEO_FORMAT_VUYA) format */
+  if (mem->surface->Info.FourCC == MFX_FOURCC_AYUV)
+    return mem->surface->Data.V;
+  else
+    return mem->surface->Data.Y;
 }
 
 static void