dsputil: convert remaining op_pixels_func

Convert to diffptr_t the line_size parameters still int.

Remove all the warnings in dsputil.c

libavcodec/dsputil.h

@@ -114,7 +114,7 @@ DEF_OLD_QPEL(qpel8_mc13_old_c)
 DEF_OLD_QPEL(qpel8_mc33_old_c)
 
 #define CALL_2X_PIXELS(a, b, n)\
-static void a(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
+static void a(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
     b(block  , pixels  , line_size, h);\
     b(block+n, pixels+n, line_size, h);\
 }

libavcodec/dsputil_template.c

@@ -361,7 +361,7 @@ static inline void FUNCC(OPNAME ## _pixels4_xy2)(uint8_t *block, const uint8_t *
         }\
 }\
 \
-static inline void FUNCC(OPNAME ## _pixels8_xy2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)\
+static inline void FUNCC(OPNAME ## _pixels8_xy2)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)\
 {\
     /* FIXME HIGH BIT DEPTH */\
     int j;\

libavcodec/hpel_template.c

@@ -20,7 +20,7 @@
  */
 
 #define DEF_HPEL(OPNAME, OP) \
-static inline void FUNCC(OPNAME ## _pixels2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
+static inline void FUNCC(OPNAME ## _pixels2)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
     int i;\
     for(i=0; i<h; i++){\
         OP(*((pixel2*)(block  )), AV_RN2P(pixels  ));\
@@ -28,7 +28,7 @@ static inline void FUNCC(OPNAME ## _pixels2)(uint8_t *block, const uint8_t *pixe
         block +=line_size;\
     }\
 }\
-static inline void FUNCC(OPNAME ## _pixels4)(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
+static inline void FUNCC(OPNAME ## _pixels4)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
     int i;\
     for(i=0; i<h; i++){\
         OP(*((pixel4*)(block  )), AV_RN4P(pixels  ));\
@@ -36,7 +36,7 @@ static inline void FUNCC(OPNAME ## _pixels4)(uint8_t *block, const uint8_t *pixe
         block +=line_size;\
     }\
 }\
-static inline void FUNCC(OPNAME ## _pixels8)(uint8_t *block, const uint8_t *pixels, int line_size, int h){\
+static inline void FUNCC(OPNAME ## _pixels8)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h){\
     int i;\
     for(i=0; i<h; i++){\
         OP(*((pixel4*)(block                )), AV_RN4P(pixels                ));\