avutil/imgutils: Constify some pointees

This is done immediately without waiting for the next major bump
just as in 9546b3a1cb and
4eaaa38d3d.

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

doc/APIchanges

@@ -2,6 +2,10 @@ The last version increases of all libraries were on 2023-02-09
 
 API changes, most recent first:
 
+2023-09-07 - xxxxxxxxxx - lavu 58.20.100 - imgutils.h
+  Constify some pointees in av_image_copy(), av_image_copy_uc_from() and
+  av_image_fill_black().
+
 2023-09-07 - xxxxxxxxxx - lavf 60.12.100 - avio.h
   Constify the buffer pointees in the write_packet and write_data_type
   callbacks of AVIOContext on the next major bump.

libavutil/imgutils.c

@@ -378,8 +378,8 @@ void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
     image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
 }
 
-static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
-                       const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
+static void image_copy(uint8_t *const dst_data[4], const ptrdiff_t dst_linesizes[4],
+                       const uint8_t *const src_data[4], const ptrdiff_t src_linesizes[4],
                        enum AVPixelFormat pix_fmt, int width, int height,
                        void (*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *,
                                           ptrdiff_t, ptrdiff_t, int))
@@ -419,8 +419,8 @@ static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
     }
 }
 
-void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
-                   const uint8_t *src_data[4], const int src_linesizes[4],
+void av_image_copy(uint8_t *const dst_data[4], const int dst_linesizes[4],
+                   const uint8_t * const src_data[4], const int src_linesizes[4],
                    enum AVPixelFormat pix_fmt, int width, int height)
 {
     ptrdiff_t dst_linesizes1[4], src_linesizes1[4];
@@ -435,8 +435,8 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
                width, height, image_copy_plane);
 }
 
-void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
-                           const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
+void av_image_copy_uc_from(uint8_t * const dst_data[4], const ptrdiff_t dst_linesizes[4],
+                           const uint8_t * const src_data[4], const ptrdiff_t src_linesizes[4],
                            enum AVPixelFormat pix_fmt, int width, int height)
 {
     image_copy(dst_data, dst_linesizes, src_data, src_linesizes, pix_fmt,
@@ -579,7 +579,7 @@ static void memset_bytes(uint8_t *dst, size_t dst_size, uint8_t *clear,
 // if it's a subsampled packed format).
 #define MAX_BLOCK_SIZE 32
 
-int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4],
+int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4],
                         enum AVPixelFormat pix_fmt, enum AVColorRange range,
                         int width, int height)
 {

libavutil/imgutils.h

@@ -170,8 +170,8 @@ void av_image_copy_plane_uc_from(uint8_t       *dst, ptrdiff_t dst_linesize,
  * @param width         width of the image in pixels
  * @param height        height of the image in pixels
  */
-void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
-                   const uint8_t *src_data[4], const int src_linesizes[4],
+void av_image_copy(uint8_t * const dst_data[4], const int dst_linesizes[4],
+                   const uint8_t * const src_data[4], const int src_linesizes[4],
                    enum AVPixelFormat pix_fmt, int width, int height);
 
 /**
@@ -188,8 +188,8 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
  * @note On x86, the linesizes currently need to be aligned to the cacheline
  *       size (i.e. 64) to get improved performance.
  */
-void av_image_copy_uc_from(uint8_t *dst_data[4],       const ptrdiff_t dst_linesizes[4],
-                           const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
+void av_image_copy_uc_from(uint8_t * const dst_data[4],       const ptrdiff_t dst_linesizes[4],
+                           const uint8_t * const src_data[4], const ptrdiff_t src_linesizes[4],
                            enum AVPixelFormat pix_fmt, int width, int height);
 
 /**
@@ -319,7 +319,7 @@ int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar);
  * @param height        the height of the image in pixels
  * @return 0 if the image data was cleared, a negative AVERROR code otherwise
  */
-int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4],
+int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4],
                         enum AVPixelFormat pix_fmt, enum AVColorRange range,
                         int width, int height);
 

libavutil/version.h

@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  58
-#define LIBAVUTIL_VERSION_MINOR  19
+#define LIBAVUTIL_VERSION_MINOR  20
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \