Fill the bitplane for VC1 skip picture decoding

This is a workaround for VC1 skip picture, the corresponding
bit value in bitplane should be 1 for skip picture, but sometimes
application pass down wrong value.

Signed-off-by: Li,Xiaowei <xiaowei.a.li@intel.com>
(cherry picked from commit a76acf6441a414bb5dd601485ed8ed790218bb13)

1 files changed, 8 insertions, 2 deletions

diff --git a/src/gen7_mfd.c b/src/gen7_mfd.c
index da4a2d3..0fb7249 100755
--- a/src/gen7_mfd.c
+++ b/src/gen7_mfd.c
@@ -1338,11 +1338,13 @@ gen7_mfd_vc1_decode_init(VADriverContextP ctx,
     int i;
     dri_bo *bo;
     int width_in_mbs;
-
+    int picture_type;
+ 
     assert(decode_state->pic_param && decode_state->pic_param->buffer);
     pic_param = (VAPictureParameterBufferVC1 *)decode_state->pic_param->buffer;
     width_in_mbs = ALIGN(pic_param->coded_width, 16) / 16;
-
+    picture_type = pic_param->picture_fields.bits.picture_type;
+ 
     /* reference picture */
     obj_surface = SURFACE(pic_param->forward_reference_picture);
 
@@ -1441,6 +1443,10 @@ gen7_mfd_vc1_decode_init(VADriverContextP ctx,
                 src_shift = !((src_h * width_in_mbs + src_w) & 1) * 4;
                 src_value = ((src[src_index] >> src_shift) & 0xf);
 
+                if (picture_type == GEN7_VC1_SKIPPED_PICTURE){
+                    src_value |= 0x2;
+                }
+
                 dst_index = src_w / 2;
                 dst[dst_index] = ((dst[dst_index] >> 4) | (src_value << 4));
             }