avcodec/motion_est: Constify mv-table parameters where possible

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

libavcodec/motion_est.c

@@ -1594,7 +1594,7 @@ void ff_estimate_b_frame_motion(MpegEncContext * s,
 }
 
 /* find best f_code for ME which do unlimited searches */
-int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type)
+int ff_get_best_fcode(MpegEncContext * s, const int16_t (*mv_table)[2], int type)
 {
     if (s->motion_est != FF_ME_ZERO) {
         int score[8];

libavcodec/motion_est.h

@@ -118,14 +118,14 @@ int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s,
 
 int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr,
                           int P[10][2], int src_index, int ref_index,
-                          int16_t (*last_mv)[2], int ref_mv_scale, int size,
-                          int h);
+                          const int16_t (*last_mv)[2], int ref_mv_scale,
+                          int size, int h);
 
 int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index,
                     int ref_index, int size, int h, int add_rate);
 
 int ff_get_best_fcode(struct MpegEncContext *s,
-                      int16_t (*mv_table)[2], int type);
+                      const int16_t (*mv_table)[2], int type);
 
 void ff_fix_long_p_mvs(struct MpegEncContext *s, int type);
 void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table,

libavcodec/motion_est_template.c

@@ -858,7 +858,7 @@ static av_always_inline int diamond_search(MpegEncContext * s, int *best, int dm
    optimal mv.
  */
 static av_always_inline int epzs_motion_search_internal(MpegEncContext * s, int *mx_ptr, int *my_ptr,
-                             int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
+                             int P[10][2], int src_index, int ref_index, const int16_t (*last_mv)[2],
                              int ref_mv_scale, int flags, int size, int h)
 {
     MotionEstContext * const c= &s->me;
@@ -976,7 +976,7 @@ static av_always_inline int epzs_motion_search_internal(MpegEncContext * s, int
 //this function is dedicated to the brain damaged gcc
 int ff_epzs_motion_search(MpegEncContext *s, int *mx_ptr, int *my_ptr,
                           int P[10][2], int src_index, int ref_index,
-                          int16_t (*last_mv)[2], int ref_mv_scale,
+                          const int16_t (*last_mv)[2], int ref_mv_scale,
                           int size, int h)
 {
     MotionEstContext * const c= &s->me;
@@ -992,7 +992,7 @@ int ff_epzs_motion_search(MpegEncContext *s, int *mx_ptr, int *my_ptr,
 
 static int epzs_motion_search2(MpegEncContext * s,
                              int *mx_ptr, int *my_ptr, int P[10][2],
-                             int src_index, int ref_index, int16_t (*last_mv)[2],
+                             int src_index, int ref_index, const int16_t (*last_mv)[2],
                              int ref_mv_scale, const int size)
 {
     MotionEstContext * const c= &s->me;