Make vp8_adjust_mb_lf_value return the updated value rather than
manipulating it in situ via a pointer.

Change-Id: If4a87a4eccd84f39577c0e91e171245f4954c5cf

vp8/common/loopfilter.c

diff --git a/vp8/common/loopfilter.c b/vp8/common/loopfilter.c
index f9d0823..90e1d9c 100644
--- a/vp8/common/loopfilter.c
+++ b/vp8/common/loopfilter.c
@@ -263,43 +263,44 @@
 }
 
 
-void vp8_adjust_mb_lf_value(MACROBLOCKD *mbd, int *filter_level)
+int vp8_adjust_mb_lf_value(MACROBLOCKD *mbd, int filter_level)
 {
     MB_MODE_INFO *mbmi = &mbd->mode_info_context->mbmi;
 
     if (mbd->mode_ref_lf_delta_enabled)
     {
         /* Apply delta for reference frame */
-        *filter_level += mbd->ref_lf_deltas[mbmi->ref_frame];
+        filter_level += mbd->ref_lf_deltas[mbmi->ref_frame];
 
         /* Apply delta for mode */
         if (mbmi->ref_frame == INTRA_FRAME)
         {
             /* Only the split mode BPRED has a further special case */
             if (mbmi->mode == B_PRED)
-                *filter_level +=  mbd->mode_lf_deltas[0];
+                filter_level +=  mbd->mode_lf_deltas[0];
         }
         else
         {
             /* Zero motion mode */
             if (mbmi->mode == ZEROMV)
-                *filter_level +=  mbd->mode_lf_deltas[1];
+                filter_level +=  mbd->mode_lf_deltas[1];
 
             /* Split MB motion mode */
             else if (mbmi->mode == SPLITMV)
-                *filter_level +=  mbd->mode_lf_deltas[3];
+                filter_level +=  mbd->mode_lf_deltas[3];
 
             /* All other inter motion modes (Nearest, Near, New) */
             else
-                *filter_level +=  mbd->mode_lf_deltas[2];
+                filter_level +=  mbd->mode_lf_deltas[2];
         }
 
         /* Range check */
-        if (*filter_level > MAX_LOOP_FILTER)
-            *filter_level = MAX_LOOP_FILTER;
-        else if (*filter_level < 0)
-            *filter_level = 0;
+        if (filter_level > MAX_LOOP_FILTER)
+            filter_level = MAX_LOOP_FILTER;
+        else if (filter_level < 0)
+            filter_level = 0;
     }
+    return filter_level;
 }
 
 
@@ -373,7 +374,7 @@
              * These specified to 8th pel as they are always compared to values that are in 1/8th pel units
              * Apply any context driven MB level adjustment
              */
-            vp8_adjust_mb_lf_value(mbd, &filter_level);
+            filter_level = vp8_adjust_mb_lf_value(mbd, filter_level);
 
             if (filter_level)
             {
@@ -473,7 +474,7 @@
             filter_level = baseline_filter_level[Segment];
 
             /* Apply any context driven MB level adjustment */
-            vp8_adjust_mb_lf_value(mbd, &filter_level);
+            filter_level = vp8_adjust_mb_lf_value(mbd, filter_level);
 
             if (filter_level)
             {

vp8/common/onyxc_int.h

diff --git a/vp8/common/onyxc_int.h b/vp8/common/onyxc_int.h
index e011ec9..c8c2277 100644
--- a/vp8/common/onyxc_int.h
+++ b/vp8/common/onyxc_int.h
@@ -200,7 +200,7 @@
 } VP8_COMMON;
 
 
-void vp8_adjust_mb_lf_value(MACROBLOCKD *mbd, int *filter_level);
+int vp8_adjust_mb_lf_value(MACROBLOCKD *mbd, int filter_level);
 void vp8_init_loop_filter(VP8_COMMON *cm);
 void vp8_frame_init_loop_filter(loop_filter_info *lfi, int frame_type);
 extern void vp8_loop_filter_frame(VP8_COMMON *cm,    MACROBLOCKD *mbd,  int filt_val);

vp8/decoder/threading.c

diff --git a/vp8/decoder/threading.c b/vp8/decoder/threading.c
index 930d9b9..ec2cb2b 100644
--- a/vp8/decoder/threading.c
+++ b/vp8/decoder/threading.c
@@ -320,7 +320,7 @@
                              * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units
                              * Apply any context driven MB level adjustment
                              */
-                            vp8_adjust_mb_lf_value(xd, &filter_level);
+                            filter_level = vp8_adjust_mb_lf_value(xd, filter_level);
                         }
 
                         /* Distance of Mb to the various image edges.
@@ -863,7 +863,7 @@
                      * These are specified to 8th pel as they are always compared to values that are in 1/8th pel units
                      * Apply any context driven MB level adjustment
                      */
-                    vp8_adjust_mb_lf_value(xd, &filter_level);
+                    filter_level = vp8_adjust_mb_lf_value(xd, filter_level);
                 }
 
                 /* Distance of Mb to the various image edges.