On Thu, Mar 31, 2016 at 04:01:16PM -0400, Ronald S. Bultje wrote:
> They were derived from incorrect values cr=0.2125 (should be cr=0.2126)
> and cb=0.0721 (should be cb=0.0722).
> ---
> libswscale/yuv2rgb.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/libswscale/yuv2rgb.c b/libswscale/yuv2rgb.c
> index 62abb7d..a0242bf 100644
> --- a/libswscale/yuv2rgb.c
> +++ b/libswscale/yuv2rgb.c
> @@ -47,8 +47,8 @@
> * where Y = cr * R + cg * G + cb * B and cr + cg + cb = 1.
> */
> const int32_t ff_yuv2rgb_coeffs[8][4] = {
> - { 117504, 138453, 13954, 34903 }, /* no sequence_display_extension */
> - { 117504, 138453, 13954, 34903 }, /* ITU-R Rec. 709 (1990) */
> + { 117489, 138438, 13975, 34925 }, /* no sequence_display_extension */
> + { 117489, 138438, 13975, 34925 }, /* ITU-R Rec. 709 (1990) */it seems nothing in fate is using these but if you checked the values and theye where wrong then this should be ok I do remember though that i was finetuning some SIMD yuv-rgb values by +-1 to maximize PSNR for combinations of rgb-yuv and yuv-rgb so keep that in mind if you find errors in them too :) [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Dictatorship naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme liberty. -- Plato
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