avcodec/hevc_refs: Constify ff_hevc_get_ref_list()

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/hevc_filter.c

@@ -645,8 +645,8 @@ static void deblocking_filter_CTB(HEVCContext *s, int x0, int y0)
     }
 }
 
-static int boundary_strength(HEVCContext *s, MvField *curr, MvField *neigh,
-                             RefPicList *neigh_refPicList)
+static int boundary_strength(const HEVCContext *s, const MvField *curr, const MvField *neigh,
+                             const RefPicList *neigh_refPicList)
 {
     if (curr->pred_flag == PF_BI &&  neigh->pred_flag == PF_BI) {
         // same L0 and L1
@@ -734,9 +734,9 @@ void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0,
         boundary_upper = 0;
 
     if (boundary_upper) {
-        RefPicList *rpl_top = (lc->boundary_flags & BOUNDARY_UPPER_SLICE) ?
-                              ff_hevc_get_ref_list(s, s->ref, x0, y0 - 1) :
-                              s->ref->refPicList;
+        const RefPicList *rpl_top = (lc->boundary_flags & BOUNDARY_UPPER_SLICE) ?
+                                    ff_hevc_get_ref_list(s, s->ref, x0, y0 - 1) :
+                                    s->ref->refPicList;
         int yp_pu = (y0 - 1) >> log2_min_pu_size;
         int yq_pu =  y0      >> log2_min_pu_size;
         int yp_tu = (y0 - 1) >> log2_min_tu_size;
@@ -772,9 +772,9 @@ void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0,
         boundary_left = 0;
 
     if (boundary_left) {
-        RefPicList *rpl_left = (lc->boundary_flags & BOUNDARY_LEFT_SLICE) ?
-                               ff_hevc_get_ref_list(s, s->ref, x0 - 1, y0) :
-                               s->ref->refPicList;
+        const RefPicList *rpl_left = (lc->boundary_flags & BOUNDARY_LEFT_SLICE) ?
+                                     ff_hevc_get_ref_list(s, s->ref, x0 - 1, y0) :
+                                     s->ref->refPicList;
         int xp_pu = (x0 - 1) >> log2_min_pu_size;
         int xq_pu =  x0      >> log2_min_pu_size;
         int xp_tu = (x0 - 1) >> log2_min_tu_size;

libavcodec/hevc_mvs.c

@@ -113,7 +113,7 @@ static av_always_inline int compare_mv_ref_idx(struct MvField A, struct MvField
     return 0;
 }
 
-static av_always_inline void mv_scale(Mv *dst, Mv *src, int td, int tb)
+static av_always_inline void mv_scale(Mv *dst, const Mv *src, int td, int tb)
 {
     int tx, scale_factor;
 
@@ -127,10 +127,10 @@ static av_always_inline void mv_scale(Mv *dst, Mv *src, int td, int tb)
                            (scale_factor * src->y < 0)) >> 8);
 }
 
-static int check_mvset(Mv *mvLXCol, Mv *mvCol,
+static int check_mvset(Mv *mvLXCol, const Mv *mvCol,
                        int colPic, int poc,
-                       RefPicList *refPicList, int X, int refIdxLx,
-                       RefPicList *refPicList_col, int listCol, int refidxCol)
+                       const RefPicList *refPicList, int X, int refIdxLx,
+                       const RefPicList *refPicList_col, int listCol, int refidxCol)
 {
     int cur_lt = refPicList[X].isLongTerm[refIdxLx];
     int col_lt = refPicList_col[listCol].isLongTerm[refidxCol];
@@ -163,7 +163,7 @@ static int check_mvset(Mv *mvLXCol, Mv *mvCol,
 // derive the motion vectors section 8.5.3.1.8
 static int derive_temporal_colocated_mvs(HEVCContext *s, MvField temp_col,
                                          int refIdxLx, Mv *mvLXCol, int X,
-                                         int colPic, RefPicList *refPicList_col)
+                                         int colPic, const RefPicList *refPicList_col)
 {
     RefPicList *refPicList = s->ref->refPicList;
 

libavcodec/hevc_refs.c

@@ -55,13 +55,14 @@ void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
     }
 }
 
-RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
+const RefPicList *ff_hevc_get_ref_list(const HEVCContext *s,
+                                       const HEVCFrame *ref, int x0, int y0)
 {
     int x_cb         = x0 >> s->ps.sps->log2_ctb_size;
     int y_cb         = y0 >> s->ps.sps->log2_ctb_size;
     int pic_width_cb = s->ps.sps->ctb_width;
     int ctb_addr_ts  = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
-    return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
+    return &ref->rpl_tab[ctb_addr_ts]->refPicList[0];
 }
 
 void ff_hevc_clear_refs(HEVCContext *s)

libavcodec/hevcdec.h

@@ -584,8 +584,8 @@ void ff_hevc_clear_refs(HEVCContext *s);
  */
 void ff_hevc_flush_dpb(HEVCContext *s);
 
-RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *frame,
-                                 int x0, int y0);
+const RefPicList *ff_hevc_get_ref_list(const HEVCContext *s, const HEVCFrame *frame,
+                                       int x0, int y0);
 
 /**
  * Construct the reference picture sets for the current frame.