uint32_t c;
for (c = 0; c < FF_ARRAY_ELEMS(hqx->rgbtoyuv); c++) {
- const uint32_t r = c >> 16 & 0xff;
- const uint32_t g = c >> 8 & 0xff;
- const uint32_t b = c & 0xff;
- const uint32_t y = (uint32_t)( 0.299*r + 0.587*g + 0.114*b);
- const uint32_t u = (uint32_t)(-0.169*r - 0.331*g + 0.5*b) + 128;
- const uint32_t v = (uint32_t)( 0.5*r - 0.419*g - 0.081*b) + 128;
+ const int r = c >> 16 & 0xff;
+ const int g = c >> 8 & 0xff;
+ const int b = c & 0xff;
+ const uint32_t y = (uint32_t)(( 299*r + 587*g + 114*b)/1000);
+ const uint32_t u = (uint32_t)((-169*r - 331*g + 500*b)/1000) + 128;
+ const uint32_t v = (uint32_t)(( 500*r - 419*g - 81*b)/1000) + 128;
hqx->rgbtoyuv[c] = (y << 16) + (u << 8) + v;
}