mpeg2: fix reference surfaces construction (IVB).

Avoid an assert() since we were assigning a reference surface even
if it did not have any backing store.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
(cherry picked from commit 18212d42c5dfee047094ae67914c2b2b630ad99e)

diff --git a/src/gen7_mfd.c b/src/gen7_mfd.c
index 625fea3..26c109b 100644 (file)
--- a/src/gen7_mfd.c
+++ b/src/gen7_mfd.c
@@ -1084,7 +1084,7 @@ gen7_mfd_mpeg2_decode_init(VADriverContextP ctx,
     if (obj_surface && obj_surface->bo)
         gen7_mfd_context->reference_surface[1].surface_id = pic_param->backward_reference_picture;
     else
-        gen7_mfd_context->reference_surface[1].surface_id = pic_param->forward_reference_picture;
+        gen7_mfd_context->reference_surface[1].surface_id = gen7_mfd_context->reference_surface[0].surface_id;
 
     /* must do so !!! */
     for (i = 2; i < ARRAY_ELEMS(gen7_mfd_context->reference_surface); i++)