-/**
- * 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(uint8_t *start, int len, int bpp, int same)
-{
- uint8_t *pos;
- int count = 1;
-
- for(pos = start + bpp; count < FFMIN(128, len); pos += bpp, count ++) {
- if(same != !memcmp(pos-bpp, pos, bpp)) {
- if(!same) {
- /* if bpp == 1, then 0 1 1 0 is more efficiently encoded as a single
- * raw block of pixels. for larger bpp, RLE is as good or better */
- if(bpp == 1 && count + 1 < FFMIN(128, len) && *pos != *(pos+1))
- continue;
-
- /* if RLE can encode the next block better than as a raw block,
- * back up and leave _all_ the identical pixels for RLE */
- count --;
- }
- break;
- }
- }