diff options
Diffstat (limited to 'video/csputils.c')
| -rw-r--r-- | video/csputils.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/video/csputils.c b/video/csputils.c index f42cfb398b..238c4daf4e 100644 --- a/video/csputils.c +++ b/video/csputils.c @@ -671,18 +671,22 @@ void mp_get_yuv2rgb_coeffs(struct mp_csp_params *params, struct mp_cmat *m) abort(); } - rgblev.min = (rgblev.min + params->brightness) * params->contrast; - rgblev.max = (rgblev.max + params->brightness) * params->contrast; - double ymul = (rgblev.max - rgblev.min) / (yuvlev.ymax - yuvlev.ymin); double cmul = (rgblev.max - rgblev.min) / (yuvlev.cmid - yuvlev.cmin) / 2; + + // Contrast scales the output value range (gain) + ymul *= params->contrast; + cmul *= params->contrast; + for (int i = 0; i < 3; i++) { m->m[i][0] *= ymul; m->m[i][1] *= cmul; m->m[i][2] *= cmul; - // Set c so that Y=umin,UV=cmid maps to RGB=min (black to black) + // Set c so that Y=umin,UV=cmid maps to RGB=min (black to black), + // also add brightness offset (black lift) m->c[i] = rgblev.min - m->m[i][0] * yuvlev.ymin - -(m->m[i][1] + m->m[i][2]) * yuvlev.cmid; + - (m->m[i][1] + m->m[i][2]) * yuvlev.cmid + + params->brightness; } int in_bits = FFMAX(params->int_bits_in, 1); |