Move check_intra4x4_pred_mode() back from h264.h to h264.c, the function is just

called once per MB in worst case and doesnt seem to benefit from static inline.
Actually the code might be a hair faster now (0.1% according to my benchmark but
this could be random noise)

Originally committed as revision 21173 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 41 insertions, 2 deletions

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index f1d7726f25..9883d65ef6 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -544,6 +544,45 @@ void ff_h264_write_back_intra_pred_mode(H264Context *h){
 /**
  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
  */
+int ff_h264_check_intra4x4_pred_mode(H264Context *h){
+    MpegEncContext * const s = &h->s;
+    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
+    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
+    int i;
+
+    if(!(h->top_samples_available&0x8000)){
+        for(i=0; i<4; i++){
+            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
+            if(status<0){
+                av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
+                return -1;
+            } else if(status){
+                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
+            }
+        }
+    }
+
+    if((h->left_samples_available&0x8888)!=0x8888){
+        static const int mask[4]={0x8000,0x2000,0x80,0x20};
+        for(i=0; i<4; i++){
+            if(!(h->left_samples_available&mask[i])){
+                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
+                if(status<0){
+                    av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
+                    return -1;
+                } else if(status){
+                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
+                }
+            }
+        }
+    }
+
+    return 0;
+} //FIXME cleanup like ff_h264_check_intra_pred_mode
+
+/**
+ * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
+ */
 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
     MpegEncContext * const s = &h->s;
     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
@@ -3277,7 +3316,7 @@ decode_intra_mb:
                     h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
             }
             ff_h264_write_back_intra_pred_mode(h);
-            if( check_intra4x4_pred_mode(h) < 0)
+            if( ff_h264_check_intra4x4_pred_mode(h) < 0)
                 return -1;
         }else{
             h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode);
@@ -4378,7 +4417,7 @@ decode_intra_mb:
                 }
             }
             ff_h264_write_back_intra_pred_mode(h);
-            if( check_intra4x4_pred_mode(h) < 0 ) return -1;
+            if( ff_h264_check_intra4x4_pred_mode(h) < 0 ) return -1;
         } else {
             h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode( h, h->intra16x16_pred_mode );
             if( h->intra16x16_pred_mode < 0 ) return -1;