diff --git a/libavcodec/bfin/vp3_bfin.c b/libavcodec/bfin/vp3_bfin.c
index ca6702b317..ce8b0336fd 100644
--- a/libavcodec/bfin/vp3_bfin.c
+++ b/libavcodec/bfin/vp3_bfin.c
@@ -30,7 +30,7 @@
 /* Intra iDCT offset 128 */
 static void bfin_vp3_idct_put(uint8_t *dest, int line_size, int16_t *block)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP + 128;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP + 128;
     int i,j;
 
     ff_bfin_vp3_idct (block);
diff --git a/libavcodec/bit_depth_template.c b/libavcodec/bit_depth_template.c
index a757f45382..37d02adaf2 100644
--- a/libavcodec/bit_depth_template.c
+++ b/libavcodec/bit_depth_template.c
@@ -70,7 +70,7 @@
 #   define pixel4 uint32_t
 #   define dctcoef int16_t
 
-#   define INIT_CLIP uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+#   define INIT_CLIP const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 #   define no_rnd_avg_pixel4 no_rnd_avg32
 #   define    rnd_avg_pixel4    rnd_avg32
 #   define AV_RN2P  AV_RN16
diff --git a/libavcodec/cavs.c b/libavcodec/cavs.c
index abd4bacdda..47eaa0b40a 100644
--- a/libavcodec/cavs.c
+++ b/libavcodec/cavs.c
@@ -276,7 +276,7 @@ static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride)
     int x, y, ia;
     int ih = 0;
     int iv = 0;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     for (x = 0; x < 4; x++) {
         ih += (x + 1) * (top [5 + x] - top [3 - x]);
diff --git a/libavcodec/cavsdsp.c b/libavcodec/cavsdsp.c
index e8494ec7db..70c8f35b7f 100644
--- a/libavcodec/cavsdsp.c
+++ b/libavcodec/cavsdsp.c
@@ -186,7 +186,7 @@ static void cavs_filter_ch_c(uint8_t *d, int stride, int alpha, int beta, int tc
 static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) {
     int i;
     int16_t (*src)[8] = (int16_t(*)[8])block;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     src[0][0] += 8;
 
@@ -261,7 +261,7 @@ static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) {
 #define CAVS_SUBPIX(OPNAME, OP, NAME, A, B, C, D, E, F) \
 static void OPNAME ## cavs_filt8_h_ ## NAME(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int h=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<h; i++)\
     {\
@@ -280,7 +280,7 @@ static void OPNAME ## cavs_filt8_h_ ## NAME(uint8_t *dst, uint8_t *src, int dstS
 \
 static void OPNAME ## cavs_filt8_v_  ## NAME(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<w; i++)\
     {\
@@ -334,7 +334,7 @@ static void OPNAME ## cavs_filt8_hv_ ## NAME(uint8_t *dst, uint8_t *src1, uint8_
     int16_t *tmp = temp;\
     const int h=8;\
     const int w=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     src1 -= 2*srcStride;\
     for(i=0; i<h+5; i++)\
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 7b7cdc88d4..35494a3e2f 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -751,7 +751,7 @@ static inline void avg_tpel_pixels_mc22_c(uint8_t *dst, const uint8_t *src, int
 
 #define QPEL_MC(r, OPNAME, RND, OP) \
 static void OPNAME ## mpeg4_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<h; i++)\
     {\
@@ -770,7 +770,7 @@ static void OPNAME ## mpeg4_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstS
 \
 static void OPNAME ## mpeg4_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w=8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i=0; i<w; i++)\
     {\
@@ -797,7 +797,7 @@ static void OPNAME ## mpeg4_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstS
 }\
 \
 static void OPNAME ## mpeg4_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     \
     for(i=0; i<h; i++)\
@@ -824,7 +824,7 @@ static void OPNAME ## mpeg4_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dst
 }\
 \
 static void OPNAME ## mpeg4_qpel16_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     const int w=16;\
     for(i=0; i<w; i++)\
@@ -1289,7 +1289,7 @@ QPEL_MC(0, avg_       , _       , op_avg)
 #define put_no_rnd_qpel16_mc00_c ff_put_pixels16x16_8_c
 
 static void wmv2_mspel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int i;
 
     for(i=0; i<h; i++){
@@ -1326,7 +1326,7 @@ void ff_avg_rv40_qpel8_mc33_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride)
 #endif /* CONFIG_RV40_DECODER */
 
 static void wmv2_mspel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int w){
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int i;
 
     for(i=0; i<w; i++){
diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index ae16f05e4c..cf4524ef92 100644
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -34,7 +34,7 @@ typedef struct DVDSubContext {
 
 static void yuv_a_to_rgba(const uint8_t *ycbcr, const uint8_t *alpha, uint32_t *rgba, int num_values)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     uint8_t r, g, b;
     int i, y, cb, cr;
     int r_add, g_add, b_add;
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index feef3a8682..4834b22baa 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -219,7 +219,7 @@ static void h_block_filter(ERContext *s, uint8_t *dst, int w,
                            int h, int stride, int is_luma)
 {
     int b_x, b_y, mvx_stride, mvy_stride;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     set_mv_strides(s, &mvx_stride, &mvy_stride);
     mvx_stride >>= is_luma;
     mvy_stride *= mvx_stride;
@@ -287,7 +287,7 @@ static void v_block_filter(ERContext *s, uint8_t *dst, int w, int h,
                            int stride, int is_luma)
 {
     int b_x, b_y, mvx_stride, mvy_stride;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     set_mv_strides(s, &mvx_stride, &mvy_stride);
     mvx_stride >>= is_luma;
     mvy_stride *= mvx_stride;
diff --git a/libavcodec/h264pred.c b/libavcodec/h264pred.c
index 15f2112b91..07aa2ae04e 100644
--- a/libavcodec/h264pred.c
+++ b/libavcodec/h264pred.c
@@ -268,7 +268,7 @@ static void pred4x4_horizontal_up_rv40_nodown_c(uint8_t *src,
 static void pred4x4_tm_vp8_c(uint8_t *src, const uint8_t *topright,
                              ptrdiff_t stride)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
     uint8_t *top = src-stride;
     int y;
 
@@ -294,7 +294,7 @@ static void pred16x16_plane_rv40_c(uint8_t *src, ptrdiff_t stride)
 
 static void pred16x16_tm_vp8_c(uint8_t *src, ptrdiff_t stride)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
     uint8_t *top = src-stride;
     int y;
 
@@ -376,7 +376,7 @@ static void pred8x8_dc_rv40_c(uint8_t *src, ptrdiff_t stride)
 
 static void pred8x8_tm_vp8_c(uint8_t *src, ptrdiff_t stride)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP - src[-1-stride];
     uint8_t *top = src-stride;
     int y;
 
diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index d62c9c1dad..646fb85b77 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -358,7 +358,7 @@ static void deinterlace_line_c(uint8_t *dst,
                              const uint8_t *lum,
                              int size)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int sum;
 
     for(;size > 0;size--) {
@@ -381,7 +381,7 @@ static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
                                        uint8_t *lum_m2, uint8_t *lum_m1,
                                        uint8_t *lum, int size)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int sum;
 
     for(;size > 0;size--) {
diff --git a/libavcodec/rv30.c b/libavcodec/rv30.c
index 32f523b431..f1f33c54ec 100644
--- a/libavcodec/rv30.c
+++ b/libavcodec/rv30.c
@@ -119,7 +119,7 @@ static int rv30_decode_mb_info(RV34DecContext *r)
 static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
                                          const int stride, const int lim)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int i, diff;
 
     for(i = 0; i < 4; i++){
diff --git a/libavcodec/rv30dsp.c b/libavcodec/rv30dsp.c
index 9446df92dc..d4b122ea3a 100644
--- a/libavcodec/rv30dsp.c
+++ b/libavcodec/rv30dsp.c
@@ -32,7 +32,7 @@
 #define RV30_LOWPASS(OPNAME, OP) \
 static av_unused void OPNAME ## rv30_tpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, const int C1, const int C2){\
     const int h = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i = 0; i < h; i++)\
     {\
@@ -51,7 +51,7 @@ static av_unused void OPNAME ## rv30_tpel8_h_lowpass(uint8_t *dst, uint8_t *src,
 \
 static void OPNAME ## rv30_tpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, const int C1, const int C2){\
     const int w = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i = 0; i < w; i++)\
     {\
@@ -82,7 +82,7 @@ static void OPNAME ## rv30_tpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstSt
 static void OPNAME ## rv30_tpel8_hv_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w = 8;\
     const int h = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i, j;\
     for(j = 0; j < h; j++){\
         for(i = 0; i < w; i++){\
@@ -101,7 +101,7 @@ static void OPNAME ## rv30_tpel8_hv_lowpass(uint8_t *dst, uint8_t *src, int dstS
 static void OPNAME ## rv30_tpel8_hhv_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w = 8;\
     const int h = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i, j;\
     for(j = 0; j < h; j++){\
         for(i = 0; i < w; i++){\
@@ -120,7 +120,7 @@ static void OPNAME ## rv30_tpel8_hhv_lowpass(uint8_t *dst, uint8_t *src, int dst
 static void OPNAME ## rv30_tpel8_hvv_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w = 8;\
     const int h = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i, j;\
     for(j = 0; j < h; j++){\
         for(i = 0; i < w; i++){\
@@ -139,7 +139,7 @@ static void OPNAME ## rv30_tpel8_hvv_lowpass(uint8_t *dst, uint8_t *src, int dst
 static void OPNAME ## rv30_tpel8_hhvv_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
     const int w = 8;\
     const int h = 8;\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i, j;\
     for(j = 0; j < h; j++){\
         for(i = 0; i < w; i++){\
diff --git a/libavcodec/rv40dsp.c b/libavcodec/rv40dsp.c
index 20f075d034..b63d238662 100644
--- a/libavcodec/rv40dsp.c
+++ b/libavcodec/rv40dsp.c
@@ -32,7 +32,7 @@
 #define RV40_LOWPASS(OPNAME, OP) \
 static av_unused void OPNAME ## rv40_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                                      const int h, const int C1, const int C2, const int SHIFT){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i = 0; i < h; i++)\
     {\
@@ -51,7 +51,7 @@ static av_unused void OPNAME ## rv40_qpel8_h_lowpass(uint8_t *dst, uint8_t *src,
 \
 static void OPNAME ## rv40_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride,\
                                            const int w, const int C1, const int C2, const int SHIFT){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int i;\
     for(i = 0; i < w; i++)\
     {\
@@ -350,7 +350,7 @@ static av_always_inline void rv40_weak_loop_filter(uint8_t *src,
                                                    const int lim_q1,
                                                    const int lim_p1)
 {
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
     int i, t, u, diff;
 
     for (i = 0; i < 4; i++, src += stride) {
diff --git a/libavcodec/sh4/dsputil_sh4.c b/libavcodec/sh4/dsputil_sh4.c
index bd2b182ecc..2538945791 100644
--- a/libavcodec/sh4/dsputil_sh4.c
+++ b/libavcodec/sh4/dsputil_sh4.c
@@ -56,7 +56,7 @@ static void clear_blocks_sh4(int16_t *blocks)
 static void idct_put(uint8_t *dest, int line_size, int16_t *block)
 {
         int i;
-        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+        const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
         ff_idct_sh4(block);
         for(i=0;i<8;i++) {
                 dest[0] = cm[block[0]];
@@ -74,7 +74,7 @@ static void idct_put(uint8_t *dest, int line_size, int16_t *block)
 static void idct_add(uint8_t *dest, int line_size, int16_t *block)
 {
         int i;
-        uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+        const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
         ff_idct_sh4(block);
         for(i=0;i<8;i++) {
                 dest[0] = cm[dest[0]+block[0]];
diff --git a/libavcodec/sh4/qpel.c b/libavcodec/sh4/qpel.c
index 5fa4141538..d3de484510 100644
--- a/libavcodec/sh4/qpel.c
+++ b/libavcodec/sh4/qpel.c
@@ -363,7 +363,7 @@ static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h, int x16, int y
 
 #define QPEL_MC(r, OPNAME, RND, OP) \
 static void OPNAME ## mpeg4_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     do {\
         uint8_t *s = src; \
         int src0,src1,src2,src3,src4,src5,src6,src7,src8;\
@@ -390,7 +390,7 @@ static void OPNAME ## mpeg4_qpel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstS
 }\
 \
 static void OPNAME ## mpeg4_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int w=8;\
     do{\
         uint8_t *s = src, *d=dst;\
@@ -418,7 +418,7 @@ static void OPNAME ## mpeg4_qpel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstS
 }\
 \
 static void OPNAME ## mpeg4_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     do {\
         uint8_t *s = src;\
         int src0,src1,src2,src3,src4,src5,src6,src7,src8;\
@@ -462,7 +462,7 @@ static void OPNAME ## mpeg4_qpel16_h_lowpass(uint8_t *dst, uint8_t *src, int dst
 }\
 \
 static void OPNAME ## mpeg4_qpel16_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride){\
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;\
     int w=16;\
     do {\
         uint8_t *s = src, *d=dst;\
@@ -754,7 +754,7 @@ QPEL_MC(0, avg_       , _       , op_avg)
 #undef op_put_no_rnd
 
 static void wmv2_mspel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int h){
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     do{
         int src_1,src0,src1,src2,src3,src4,src5,src6,src7,src8,src9;
@@ -784,7 +784,7 @@ static void wmv2_mspel8_h_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int
 }
 
 static void wmv2_mspel8_v_lowpass(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int w){
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     do{
         int src_1,src0,src1,src2,src3,src4,src5,src6,src7,src8,src9;
diff --git a/libavcodec/vp8dsp.c b/libavcodec/vp8dsp.c
index 4b7782fd9b..78c9b123b6 100644
--- a/libavcodec/vp8dsp.c
+++ b/libavcodec/vp8dsp.c
@@ -160,7 +160,7 @@ static av_always_inline void filter_common(uint8_t *p, ptrdiff_t stride, int is4
 {
     LOAD_PIXELS
     int a, f1, f2;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     a = 3*(q0 - p0);
 
@@ -215,7 +215,7 @@ static av_always_inline int hev(uint8_t *p, ptrdiff_t stride, int thresh)
 static av_always_inline void filter_mbedge(uint8_t *p, ptrdiff_t stride)
 {
     int a0, a1, a2, w;
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
 
     LOAD_PIXELS
 
@@ -337,7 +337,7 @@ PUT_PIXELS(4)
 static void put_vp8_epel ## SIZE ## _h ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
 { \
     const uint8_t *filter = subpel_filters[mx-1]; \
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
     int x, y; \
 \
     for (y = 0; y < h; y++) { \
@@ -351,7 +351,7 @@ static void put_vp8_epel ## SIZE ## _h ## TAPS ## _c(uint8_t *dst, ptrdiff_t dst
 static void put_vp8_epel ## SIZE ## _v ## TAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
 { \
     const uint8_t *filter = subpel_filters[my-1]; \
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
     int x, y; \
 \
     for (y = 0; y < h; y++) { \
@@ -365,7 +365,7 @@ static void put_vp8_epel ## SIZE ## _v ## TAPS ## _c(uint8_t *dst, ptrdiff_t dst
 static void put_vp8_epel ## SIZE ## _h ## HTAPS ## v ## VTAPS ## _c(uint8_t *dst, ptrdiff_t dststride, uint8_t *src, ptrdiff_t srcstride, int h, int mx, int my) \
 { \
     const uint8_t *filter = subpel_filters[mx-1]; \
-    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
+    const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; \
     int x, y; \
     uint8_t tmp_array[(2*SIZE+VTAPS-1)*SIZE]; \
     uint8_t *tmp = tmp_array; \