vc1: make P-frame deblock filter bit-exact.

libavcodec/vc1.h

@@ -236,7 +236,7 @@ typedef struct VC1Context{
     //@}
     int ttfrm;            ///< Transform type info present at frame level
     uint8_t ttmbf;        ///< Transform type flag
-    uint8_t ttblk4x4;     ///< Value of ttblk which indicates a 4x4 transform
+    int *ttblk_base, *ttblk; ///< Transform type at the block level
     int codingset;        ///< index of current table set from 11.8 to use for luma block decoding
     int codingset2;       ///< index of current table set from 11.8 to use for chroma block decoding
     int pqindex;          ///< raw pqindex used in coding set selection
@@ -311,6 +311,8 @@ typedef struct VC1Context{
     int x8_type;
 
     uint32_t *cbp_base, *cbp;
+    uint8_t *is_intra_base, *is_intra;
+    int16_t (*luma_mv_base)[2], (*luma_mv)[2];
     uint8_t bfraction_lut_index;///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[])
     uint8_t broken_link;        ///< Broken link flag (BROKEN_LINK syntax element)
     uint8_t closed_entry;       ///< Closed entry point flag (CLOSED_ENTRY syntax element)

tests/ref/fate/vc1

@@ -2,14 +2,14 @@
 0, 3600, 38016, 0xf4715db5
 0, 7200, 38016, 0xf4715db5
 0, 10800, 38016, 0xf46af0e1
-0, 14400, 38016, 0x96992cf1
-0, 18000, 38016, 0xbaadd874
-0, 21600, 38016, 0x751f4328
-0, 25200, 38016, 0x751f4328
-0, 28800, 38016, 0xf7294772
-0, 32400, 38016, 0xf7294772
-0, 36000, 38016, 0xf1d12133
-0, 39600, 38016, 0xf1d12133
-0, 43200, 38016, 0xf1d12133
-0, 46800, 38016, 0xf1d12133
-0, 50400, 38016, 0xf1d12133
+0, 14400, 38016, 0x9c1c2cf1
+0, 18000, 38016, 0xff12d87f
+0, 21600, 38016, 0x7408432b
+0, 25200, 38016, 0x7408432b
+0, 28800, 38016, 0x8d11479a
+0, 32400, 38016, 0x8d11479a
+0, 36000, 38016, 0xc4a121ab
+0, 39600, 38016, 0xc4a121ab
+0, 43200, 38016, 0xc4a121ab
+0, 46800, 38016, 0xc4a121ab
+0, 50400, 38016, 0xc4a121ab