msdk: allocator: libva: check if it's already using dmabuf when mapping

As long as we negotiate the "DMABuf" capsfeatures for now, map can't be
working. So we need to confirm not to do it if using DMABuf memory.

https://bugzilla.gnome.org/show_bug.cgi?id=793707

diff --git a/sys/msdk/gstmsdkallocator_libva.c b/sys/msdk/gstmsdkallocator_libva.c
index 275e01b..63d81b2 100644 (file)
--- a/sys/msdk/gstmsdkallocator_libva.c
+++ b/sys/msdk/gstmsdkallocator_libva.c
@@ -239,6 +239,11 @@ gst_msdk_frame_lock (mfxHDL pthis, mfxMemId mid, mfxFrameData * data)
   va_surface = mem_id->surface;
   dpy = gst_msdk_context_get_handle (context);
 
+  if (mem_id->info.mem_type == VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME) {
+    GST_WARNING ("Couldn't map the buffer since dmabuf is already in use");
+    return MFX_ERR_LOCK_MEMORY;
+  }
+
   if (mem_id->fourcc != MFX_FOURCC_P8) {
     va_status = vaDeriveImage (dpy, *va_surface, &mem_id->image);
     status = gst_msdk_get_mfx_status_from_va_status (va_status);