[FFmpeg-cvslog] vc1: simplify *_use_ic initialization

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Dec 22 14:37:30 2013 +0100| [64b98df38910bfb921988a0be89da3038274232e] | committer: Michael Niedermayer

vc1: simplify *_use_ic initialization

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=64b98df38910bfb921988a0be89da3038274232e
---

 libavcodec/vc1.c    |   16 ++++++----------
 libavcodec/vc1.h    |    2 +-
 libavcodec/vc1dec.c |    6 +++---
 3 files changed, 10 insertions(+), 14 deletions(-)

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 5391e85..fb33e6f 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -596,24 +596,20 @@ static void rotate_luts(VC1Context *v)
             C = A;                                            \
         } else {                                              \
             DEF;                                              \
-            memcpy(&tmp, &L  , sizeof(tmp));                  \
-            memcpy(&L  , &N  , sizeof(tmp));                  \
-            memcpy(&N  , &tmp, sizeof(tmp));                  \
+            memcpy(&tmp, L   , sizeof(tmp));                  \
+            memcpy(L   , N   , sizeof(tmp));                  \
+            memcpy(N   , &tmp, sizeof(tmp));                  \
             C = N;                                            \
         }                                                     \
     } while(0)
 
-    ROTATE(int tmp,             v->last_use_ic, v->next_use_ic, v->curr_use_ic, v->aux_use_ic);
+    ROTATE(int *tmp,            &v->last_use_ic, &v->next_use_ic, v->curr_use_ic, &v->aux_use_ic);
     ROTATE(uint8_t tmp[2][256], v->last_luty,   v->next_luty,   v->curr_luty,   v->aux_luty);
     ROTATE(uint8_t tmp[2][256], v->last_lutuv,  v->next_lutuv,  v->curr_lutuv,  v->aux_lutuv);
 
     INIT_LUT(32, 0, v->curr_luty[0], v->curr_lutuv[0], 0);
     INIT_LUT(32, 0, v->curr_luty[1], v->curr_lutuv[1], 0);
-    v->curr_use_ic = 0;
-    if (v->curr_luty == v->next_luty) {
-        // If we just initialized next_lut, clear next_use_ic to match.
-        v->next_use_ic = 0;
-    }
+    *v->curr_use_ic = 0;
 }
 
 int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
@@ -1108,7 +1104,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
                         INIT_LUT(v->lumscale2, v->lumshift2, v->curr_luty[v->cur_field_type^1], v->curr_lutuv[v->cur_field_type^1], 0);
                         INIT_LUT(v->lumscale , v->lumshift , v->last_luty[v->cur_field_type  ], v->last_lutuv[v->cur_field_type  ], 1);
                     }
-                    v->next_use_ic = v->curr_use_ic = 1;
+                    v->next_use_ic = *v->curr_use_ic = 1;
                 } else {
                     INIT_LUT(v->lumscale , v->lumshift , v->last_luty[0], v->last_lutuv[0], 1);
                     INIT_LUT(v->lumscale2, v->lumshift2, v->last_luty[1], v->last_lutuv[1], 1);
diff --git a/libavcodec/vc1.h b/libavcodec/vc1.h
index 0d23b44..662b58b 100644
--- a/libavcodec/vc1.h
+++ b/libavcodec/vc1.h
@@ -315,7 +315,7 @@ typedef struct VC1Context{
     uint8_t  aux_luty[2][256],  aux_lutuv[2][256];  ///< lookup tables used for intensity compensation
     uint8_t next_luty[2][256], next_lutuv[2][256];  ///< lookup tables used for intensity compensation
     uint8_t (*curr_luty)[256]  ,(*curr_lutuv)[256];
-    int last_use_ic, curr_use_ic, next_use_ic, aux_use_ic;
+    int last_use_ic, *curr_use_ic, next_use_ic, aux_use_ic;
     int rnd;                        ///< rounding control
 
     /** Frame decoding info for S/M profiles only */
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 50c7b2d..efcb169 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -377,7 +377,7 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
             srcV = s->current_picture.f.data[2];
             luty  = v->curr_luty;
             lutuv = v->curr_lutuv;
-            use_ic = v->curr_use_ic;
+            use_ic = *v->curr_use_ic;
         } else {
             srcY = s->last_picture.f.data[0];
             srcU = s->last_picture.f.data[1];
@@ -571,7 +571,7 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n, int dir, int avg)
         if (v->field_mode && (v->cur_field_type != v->ref_field_type[dir]) && v->second_field) {
             srcY = s->current_picture.f.data[0];
             luty = v->curr_luty;
-            use_ic = v->curr_use_ic;
+            use_ic = *v->curr_use_ic;
         } else {
             srcY = s->last_picture.f.data[0];
             luty = v->last_luty;
@@ -873,7 +873,7 @@ static void vc1_mc_4mv_chroma(VC1Context *v, int dir)
             srcU = s->current_picture.f.data[1];
             srcV = s->current_picture.f.data[2];
             lutuv = v->curr_lutuv;
-            use_ic = v->curr_use_ic;
+            use_ic = *v->curr_use_ic;
         } else {
             srcU = s->last_picture.f.data[1];
             srcV = s->last_picture.f.data[2];