diff options
| -rw-r--r-- | wcap/vpxenc.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/wcap/vpxenc.c b/wcap/vpxenc.c index 793b73f7..5e9e34d9 100644 --- a/wcap/vpxenc.c +++ b/wcap/vpxenc.c @@ -335,27 +335,29 @@ static inline int rgb_to_yuv(uint32_t format, uint32_t p, int *u, int *v) break; } - y = 0.299 * r + 0.587 * g + 0.114 * b; + y = (19595 * r + 38469 * g + 7472 * b) >> 16; if (y > 255) y = 255; - *u += 0.713 * (r - y); - *v += 0.564 * (b - y); + *u += 46727 * (r - y); + *v += 36962 * (b - y); return y; } static inline int clamp_uv(int u) { - if (u < -512) + int clamp = (u >> 18) + 128; + + if (clamp < 0) return 0; - else if (u > 511) + else if (clamp > 255) return 255; else - return u / 4 + 128; + return clamp; } -static void convert_to_yv12(struct wcap_decoder *wcap, vpx_image_t *img) +void convert_to_yv12(struct wcap_decoder *wcap, vpx_image_t *img) { unsigned char *y1, *y2, *u, *v; uint32_t *p1, *p2, *end; |