Module: libav Branch: release/11 Commit: a9dffdc5cfd73a426ec7f52331636b7cb4a6bcea
Author: Jan Ekström <[email protected]> Committer: Sean McGovern <[email protected]> Date: Sun Apr 24 20:30:06 2016 +0200 colorspace: Add support for BT709 BT.709 coefficients were gathered from the first two parts of BT.709 to BT.2020 conversion guide in ARIB STD-B62 (Pt. 1, Chapter 6.2.2). They were additionally confirmed by manually calculating values. Signed-off-by: Sean McGovern <[email protected]> --- libavutil/colorspace.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/libavutil/colorspace.h b/libavutil/colorspace.h index 8757566..cc27f38 100644 --- a/libavutil/colorspace.h +++ b/libavutil/colorspace.h @@ -41,6 +41,17 @@ b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\ } +#define YUV_TO_RGB1_CCIR_BT709(cb1, cr1) \ + { \ + cb = (cb1) - 128; \ + cr = (cr1) - 128; \ + r_add = ONE_HALF + FIX(1.5747 * 255.0 / 224.0) * cr; \ + g_add = ONE_HALF - FIX(0.1873 * 255.0 / 224.0) * cb - \ + FIX(0.4682 * 255.0 / 224.0) * cr; \ + b_add = ONE_HALF + FIX(1.8556 * 255.0 / 224.0) * cb; \ + } + +// To be used for the BT709 variant as well #define YUV_TO_RGB2_CCIR(r, g, b, y1)\ {\ y = ((y1) - 16) * FIX(255.0/219.0);\ _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
