diff options
Diffstat (limited to 'video/csputils.c')
| -rw-r--r-- | video/csputils.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/video/csputils.c b/video/csputils.c index 8ed3b289b1..ea55d4ddbe 100644 --- a/video/csputils.c +++ b/video/csputils.c @@ -545,7 +545,7 @@ static void mp_apply_chromatic_adaptation(struct mp_csp_col_xy src, mp_mul_matrix3x3(m, tmp); } -// get the coefficients of the source -> bt2020 cms matrix +// get the coefficients of the source -> dest cms matrix void mp_get_cms_matrix(struct mp_csp_primaries src, struct mp_csp_primaries dest, enum mp_render_intent intent, float m[3][3]) { @@ -721,6 +721,10 @@ void mp_get_csp_matrix(struct mp_csp_params *params, struct mp_cmat *m) // The values below are written in 0-255 scale - thus bring s into range. double s = mp_get_csp_mul(colorspace, params->input_bits, params->texture_bits) / 255; + // NOTE: The yuvfull ranges as presented here are arguably ambiguous, + // and conflict with at least the full-range YCbCr/ICtCp values as defined + // by ITU-R BT.2100. If somebody ever complains about full-range YUV looking + // different from their reference display, this comment is probably why. struct yuvlevels { double ymin, ymax, cmin, cmid; } yuvlim = { 16*s, 235*s, 16*s, 128*s }, yuvfull = { 0*s, 255*s, 1*s, 128*s }, // '1' for symmetry around 128 |