Factorize ff_generate_sliding_window_mmcos() out.

Originally committed as revision 24056 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.h

@@ -666,6 +666,8 @@ int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
 
 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
 
+void ff_generate_sliding_window_mmcos(H264Context *h);
+
 
 /**
  * Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.

libavcodec/h264_refs.c

@@ -474,6 +474,24 @@ static void print_long_term(H264Context *h) {
     }
 }
 
+void ff_generate_sliding_window_mmcos(H264Context *h) {
+    MpegEncContext * const s = &h->s;
+    assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
+
+    if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
+            !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
+        h->mmco[0].opcode= MMCO_SHORT2UNUSED;
+        h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
+        h->mmco_index= 1;
+        if (FIELD_PICTURE) {
+            h->mmco[0].short_pic_num *= 2;
+            h->mmco[1].opcode= MMCO_SHORT2UNUSED;
+            h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
+            h->mmco_index= 2;
+        }
+    }
+}
+
 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
     MpegEncContext * const s = &h->s;
     int i, av_uninit(j);
@@ -673,20 +691,7 @@ int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
             }
             h->mmco_index= i;
         }else{
-            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
-
-            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
-                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
-                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
-                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
-                h->mmco_index= 1;
-                if (FIELD_PICTURE) {
-                    h->mmco[0].short_pic_num *= 2;
-                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
-                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
-                    h->mmco_index= 2;
-                }
-            }
+            ff_generate_sliding_window_mmcos(h);
         }
     }