#include "rle.h"
#include "libavutil/common.h"
-/**
- * Count up to 127 consecutive pixels which are either all the same or
- * all differ from the previous and next pixels.
- * @param start Pointer to the first pixel
- * @param len Maximum number of pixels
- * @param bpp Bytes per pixel
- * @param same 1 if searching for identical pixel values. 0 for differing
- * @return Number of matching consecutive pixels found
- */
-static int count_pixels(const uint8_t *start, int len, int bpp, int same)
+int ff_rle_count_pixels(const uint8_t *start, int len, int bpp, int same)
{
const uint8_t *pos;
int count = 1;
for(x = 0; x < w; x += count) {
/* see if we can encode the next set of pixels with RLE */
- if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
+ if ((count = ff_rle_count_pixels(ptr, w - x, bpp, 1)) > 1) {
if(out + bpp + 1 > outbuf + out_size) return -1;
*out++ = (count ^ xor_rep) + add_rep;
memcpy(out, ptr, bpp);
out += bpp;
} else {
/* fall back on uncompressed */
- count = count_pixels(ptr, w-x, bpp, 0);
+ count = ff_rle_count_pixels(ptr, w - x, bpp, 0);
if(out + bpp*count >= outbuf + out_size) return -1;
*out++ = (count ^ xor_raw) + add_raw;