avcodec/mpegvideodsp: Constify src pointers

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

libavcodec/mpegvideodsp.c

@@ -21,7 +21,7 @@
 #include "libavutil/common.h"
 #include "mpegvideodsp.h"
 
-static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
+static void gmc1_c(uint8_t *dst, const uint8_t *src, int stride, int h,
                    int x16, int y16, int rounder)
 {
     const int A = (16 - x16) * (16 - y16);
@@ -44,7 +44,7 @@ static void gmc1_c(uint8_t *dst, uint8_t *src, int stride, int h,
     }
 }
 
-void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
+void ff_gmc_c(uint8_t *dst, const uint8_t *src, int stride, int h, int ox, int oy,
               int dxx, int dxy, int dyx, int dyy, int shift, int r,
               int width, int height)
 {

libavcodec/mpegvideodsp.h

@@ -21,7 +21,7 @@
 
 #include <stdint.h>
 
-void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
+void ff_gmc_c(uint8_t *dst, const uint8_t *src, int stride, int h, int ox, int oy,
               int dxx, int dxy, int dyx, int dyy, int shift, int r,
               int width, int height);
 
@@ -29,12 +29,12 @@ typedef struct MpegVideoDSPContext {
     /**
      * translational global motion compensation.
      */
-    void (*gmc1)(uint8_t *dst /* align 8 */, uint8_t *src /* align 1 */,
+    void (*gmc1)(uint8_t *dst /* align 8 */, const uint8_t *src /* align 1 */,
                  int srcStride, int h, int x16, int y16, int rounder);
     /**
      * global motion compensation.
      */
-    void (*gmc)(uint8_t *dst /* align 8 */, uint8_t *src /* align 1 */,
+    void (*gmc)(uint8_t *dst /* align 8 */, const uint8_t *src /* align 1 */,
                 int stride, int h, int ox, int oy,
                 int dxx, int dxy, int dyx, int dyy,
                 int shift, int r, int width, int height);

libavcodec/ppc/mpegvideodsp.c

@@ -31,7 +31,7 @@
 #if HAVE_ALTIVEC
 /* AltiVec-enhanced gmc1. ATM this code assumes stride is a multiple of 8
  * to preserve proper dst alignment. */
-static void gmc1_altivec(uint8_t *dst /* align 8 */, uint8_t *src /* align1 */,
+static void gmc1_altivec(uint8_t *dst /* align 8 */, const uint8_t *src /* align1 */,
                          int stride, int h, int x16, int y16, int rounder)
 {
     int i;

libavcodec/x86/mpegvideodsp.c

@@ -25,7 +25,7 @@
 
 #if HAVE_INLINE_ASM
 
-static void gmc_mmx(uint8_t *dst, uint8_t *src,
+static void gmc_mmx(uint8_t *dst, const uint8_t *src,
                     int stride, int h, int ox, int oy,
                     int dxx, int dxy, int dyx, int dyy,
                     int shift, int r, int width, int height)