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swscale: fix bt709 yuv2rgb coefficients.

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They were derived from incorrect values cr=0.2125 (should be cr=0.2126)
and cb=0.0721 (should be cb=0.0722).
This commit is contained in:
Ronald S. Bultje 2016-03-31 16:00:58 -04:00
parent 0de1c1ab86
commit 98038e2ee0
1 changed files with 2 additions and 2 deletions
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4
libswscale/yuv2rgb.c
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@ -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) */
{ 104597, 132201, 25675, 53279 }, /* unspecified */
{ 104597, 132201, 25675, 53279 }, /* reserved */
{ 104448, 132798, 24759, 53109 }, /* FCC */