hevcdsp: remove compilation-time-fixed parameter from sao_edge_filter

The stride_src parameter is always 2 * MAX_PB_SIZE + FF_INPUT_BUFFER_PADDING_SIZE.
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/hevc_filter.c

@@ -427,9 +427,8 @@ static void sao_filter_CTB(HEVCContext *s, int x, int y)
 
             copy_CTB_to_hv(s, src, stride_src, x0, y0, width, height, c_idx,
                            x_ctb, y_ctb);
-            s->hevcdsp.sao_edge_filter(src, dst, stride_src, stride_dst,
-                                       sao->offset_val[c_idx], sao->eo_class[c_idx],
-                                       width, height);
+            s->hevcdsp.sao_edge_filter(src, dst, stride_src, sao->offset_val[c_idx],
+                                       sao->eo_class[c_idx], width, height);
             s->hevcdsp.sao_edge_restore[restore](src, dst,
                                                 stride_src, stride_dst,
                                                 sao,

libavcodec/hevcdsp.h

@@ -61,9 +61,9 @@ typedef struct HEVCDSPContext {
     void (*sao_band_filter[5])(uint8_t *_dst, uint8_t *_src, ptrdiff_t _stride_dst, ptrdiff_t _stride_src,
                                int16_t *sao_offset_val, int sao_left_class, int width, int height);
 
-    void (*sao_edge_filter)(uint8_t *_dst, uint8_t *_src, ptrdiff_t stride_dst,
-                            ptrdiff_t stride_src, int16_t *sao_offset_val, int sao_eo_class,
-                            int width, int height);
+    /* implicit stride_src parameter has value of 2 * MAX_PB_SIZE + FF_INPUT_BUFFER_PADDING_SIZE */
+    void (*sao_edge_filter)(uint8_t *_dst, uint8_t *_src, ptrdiff_t stride_dst, int16_t *sao_offset_val,
+                            int sao_eo_class, int width, int height);
 
     void (*sao_edge_restore[2])(uint8_t *_dst, uint8_t *_src, ptrdiff_t _stride_dst, ptrdiff_t _stride_src,
                                 struct SAOParams *sao, int *borders, int _width, int _height, int c_idx,

libavcodec/hevcdsp_template.c

@@ -327,8 +327,7 @@ static void FUNC(sao_band_filter_0)(uint8_t *_dst, uint8_t *_src,
 
 #define CMP(a, b) ((a) > (b) ? 1 : ((a) == (b) ? 0 : -1))
 
-static void FUNC(sao_edge_filter)(uint8_t *_dst, uint8_t *_src,
-                                  ptrdiff_t stride_dst, ptrdiff_t stride_src, int16_t *sao_offset_val,
+static void FUNC(sao_edge_filter)(uint8_t *_dst, uint8_t *_src, ptrdiff_t stride_dst, int16_t *sao_offset_val,
                                   int eo, int width, int height) {
 
     static const uint8_t edge_idx[] = { 1, 2, 0, 3, 4 };
@@ -342,7 +341,7 @@ static void FUNC(sao_edge_filter)(uint8_t *_dst, uint8_t *_src,
     pixel *src = (pixel *)_src;
     int a_stride, b_stride;
     int x, y;
-    stride_src /= sizeof(pixel);
+    ptrdiff_t stride_src = (2*MAX_PB_SIZE + FF_INPUT_BUFFER_PADDING_SIZE) / sizeof(pixel);
     stride_dst /= sizeof(pixel);
 
     a_stride = pos[eo][0][0] + pos[eo][0][1] * stride_src;