WIP: video-color: Define color matrix for BT2020 constant luminance system and ICtCp color space
Specifications differentiate const and non-const variant of BT2020 matrix coefficients.
| GstVideoColorMatrix | ISO/IEC 23001-8 (used by HEVC/AVC) | MS MediaFoundation | V4L2 | FFMPEG |
|---|---|---|---|---|
GST_VIDEO_COLOR_MATRIX_BT2020 |
9 | MFVideoTransFunc_2020 |
V4L2_YCBCR_ENC_BT2020 |
AVCOL_SPC_BT2020_NCL |
GST_VIDEO_COLOR_MATRIX_BT2020_CONST (newly added) |
10 | MFVideoTransFunc_2020_const |
V4L2_YCBCR_ENC_BT2020_CONST_LUM |
AVCOL_SPC_BT2020_CL |
Note that the way of MS MediaFoundation looks a bit awkward because const vs. non-const is distinguished via transfer function category, not color-matrix.