[FFmpeg-cvslog] H.264: merge fill_rectangle into P-SKIP MV prediction, to match B-SKIP

[Jason Garrett-Glaser]

ffmpeg | branch: master | Jason Garrett-Glaser <jason at x264.com> | Wed Jul  6 07:58:50 2011 -0700| [ef0c5948018216aadae18e5626ed0b1b95668f4f] | committer: Jason Garrett-Glaser

H.264: merge fill_rectangle into P-SKIP MV prediction, to match B-SKIP

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ef0c5948018216aadae18e5626ed0b1b95668f4f
---

 libavcodec/h264.h        |    7 ++-----
 libavcodec/h264_mvpred.h |   42 ++++++++++++++++++++++--------------------
 2 files changed, 24 insertions(+), 25 deletions(-)

diff --git a/libavcodec/h264.h b/libavcodec/h264.h
index d34e6db..e88005a 100644
--- a/libavcodec/h264.h
+++ b/libavcodec/h264.h
@@ -770,7 +770,7 @@ static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale){
     return h->pps.chroma_qp_table[t][qscale];
 }
 
-static av_always_inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
+static av_always_inline void pred_pskip_motion(H264Context * const h);
 
 static void fill_decode_neighbors(H264Context *h, int mb_type){
     MpegEncContext * const s = &h->s;
@@ -1327,13 +1327,10 @@ static void av_unused decode_mb_skip(H264Context *h){
     }
     else
     {
-        int mx, my;
         mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
 
         fill_decode_neighbors(h, mb_type);
-        pred_pskip_motion(h, &mx, &my);
-        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
-        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
+        pred_pskip_motion(h);
     }
 
     write_back_motion(h, mb_type);
diff --git a/libavcodec/h264_mvpred.h b/libavcodec/h264_mvpred.h
index 8159f8a..6dceee3 100644
--- a/libavcodec/h264_mvpred.h
+++ b/libavcodec/h264_mvpred.h
@@ -232,16 +232,18 @@ static av_always_inline void pred_8x16_motion(H264Context * const h, int n, int
         }\
     }
 
-static av_always_inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
+static av_always_inline void pred_pskip_motion(H264Context * const h){
     DECLARE_ALIGNED(4, static const int16_t, zeromv)[2] = {0};
     DECLARE_ALIGNED(4, int16_t, mvbuf)[3][2];
     MpegEncContext * const s = &h->s;
     int8_t *ref = s->current_picture.ref_index[0];
     int16_t (*mv)[2] = s->current_picture.motion_val[0];
-    int top_ref, left_ref, diagonal_ref, match_count;
+    int top_ref, left_ref, diagonal_ref, match_count, mx, my;
     const int16_t *A, *B, *C;
     int b_stride = h->b_stride;
 
+    fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
+
     /* To avoid doing an entire fill_decode_caches, we inline the relevant parts here.
      * FIXME: this is a partial duplicate of the logic in fill_decode_caches, but it's
      * faster this way.  Is there a way to avoid this duplication?
@@ -251,15 +253,13 @@ static av_always_inline void pred_pskip_motion(H264Context * const h, int * cons
         A = mv[h->mb2b_xy[h->left_mb_xy[LTOP]] + 3 + b_stride*h->left_block[0]];
         FIX_MV_MBAFF(h->left_type[LTOP], left_ref, A, 0);
         if(!(left_ref | AV_RN32A(A))){
-            *mx = *my = 0;
-            return;
+            goto zeromv;
         }
     }else if(h->left_type[LTOP]){
         left_ref = LIST_NOT_USED;
         A = zeromv;
     }else{
-        *mx = *my = 0;
-        return;
+        goto zeromv;
     }
 
     if(USES_LIST(h->top_type, 0)){
@@ -267,15 +267,13 @@ static av_always_inline void pred_pskip_motion(H264Context * const h, int * cons
         B = mv[h->mb2b_xy[h->top_mb_xy] + 3*b_stride];
         FIX_MV_MBAFF(h->top_type, top_ref, B, 1);
         if(!(top_ref | AV_RN32A(B))){
-            *mx = *my = 0;
-            return;
+            goto zeromv;
         }
     }else if(h->top_type){
         top_ref = LIST_NOT_USED;
         B = zeromv;
     }else{
-        *mx = *my = 0;
-        return;
+        goto zeromv;
     }
 
     tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
@@ -304,24 +302,28 @@ static av_always_inline void pred_pskip_motion(H264Context * const h, int * cons
     match_count= !diagonal_ref + !top_ref + !left_ref;
     tprintf(h->s.avctx, "pred_pskip_motion match_count=%d\n", match_count);
     if(match_count > 1){
-        *mx= mid_pred(A[0], B[0], C[0]);
-        *my= mid_pred(A[1], B[1], C[1]);
+        mx = mid_pred(A[0], B[0], C[0]);
+        my = mid_pred(A[1], B[1], C[1]);
     }else if(match_count==1){
         if(!left_ref){
-            *mx= A[0];
-            *my= A[1];
+            mx = A[0];
+            my = A[1];
         }else if(!top_ref){
-            *mx= B[0];
-            *my= B[1];
+            mx = B[0];
+            my = B[1];
         }else{
-            *mx= C[0];
-            *my= C[1];
+            mx = C[0];
+            my = C[1];
         }
     }else{
-        *mx= mid_pred(A[0], B[0], C[0]);
-        *my= mid_pred(A[1], B[1], C[1]);
+        mx = mid_pred(A[0], B[0], C[0]);
+        my = mid_pred(A[1], B[1], C[1]);
     }
 
+    fill_rectangle( h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
+    return;
+zeromv:
+    fill_rectangle( h->mv_cache[0][scan8[0]], 4, 4, 8, 0, 4);
     return;
 }