color_transform_delta 1008 libavcodec/webp.c             p[1] += color_transform_delta(cp[3], p[2]);
color_transform_delta 1009 libavcodec/webp.c             p[3] += color_transform_delta(cp[2], p[2]) +
color_transform_delta 1010 libavcodec/webp.c                     color_transform_delta(cp[1], p[1]);