Trivial: mark source argument const for block copy functions

Author: bangnoise

source/DXTBlocks.c

@@ -28,7 +28,7 @@
 #include "DXTBlocks.h"
 #include <string.h>
 
-void HapCodecDXTReadBlockRGBA(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
+void HapCodecDXTReadBlockRGBA(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
 {
     int i;
     for (i = 0; i < 4; i++) {
@@ -71,7 +71,7 @@ int HapCodecHasSSSE3(void)
     return (hasSSE2 && hasSSE3 && hasSSSE3);
 }
 
-void HapCodecDXTReadBlockBGRAScalar(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
+void HapCodecDXTReadBlockBGRAScalar(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
 {
     int y, x;
     for (y = 0; y < 4; y++)

source/DXTBlocks.h

@@ -31,13 +31,13 @@
 #include "HapPlatform.h"
 #include <stdint.h>
 
-void HapCodecDXTReadBlockRGBA(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
+void HapCodecDXTReadBlockRGBA(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
 
 #if !defined(HAP_SSSE3_ALWAYS_AVAILABLE)
 int HapCodecHasSSSE3(void);
-void HapCodecDXTReadBlockBGRAScalar(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
+void HapCodecDXTReadBlockBGRAScalar(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
 #endif
 
-void HapCodecDXTReadBlockBGRASSSE3(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
+void HapCodecDXTReadBlockBGRASSSE3(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row);
 
 #endif

source/DXTBlocksSSSE3.c

@@ -28,7 +28,7 @@
 #include "DXTBlocks.h"
 #include <tmmintrin.h>
 
-void HapCodecDXTReadBlockBGRASSSE3(uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
+void HapCodecDXTReadBlockBGRASSSE3(const uint8_t *copy_src, uint8_t *copy_dst, unsigned int src_bytes_per_row)
 {
     int y;
     __m128i a;