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Improve documentation of SharpYuvConversionMatrix.

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Change-Id: I39898bf53db759b68c86c9005c11ded20de4eb3e
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Maryla
2024-10-03 10:35:58 +02:00
parent 169dfbf931
commit 0c3cd9cc2c
3 changed files with 23 additions and 9 deletions
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10
sharpyuv/sharpyuv_csp.c
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@ -59,31 +59,31 @@ void SharpYuvComputeConversionMatrix(const SharpYuvColorSpace* yuv_color_space,
}
// Matrices are in YUV_FIX fixed point precision.
// WebP's matrix, similar but not identical to kRec601LimitedMatrix.
// WebP's matrix, similar but not identical to kRec601LimitedMatrix
static const SharpYuvConversionMatrix kWebpMatrix = {
{16839, 33059, 6420, 16 << 16},
{-9719, -19081, 28800, 128 << 16},
{28800, -24116, -4684, 128 << 16},
};
// Kr=0.2990f Kb=0.1140f bits=8 range=kSharpYuvRangeLimited
// Kr=0.2990f Kb=0.1140f bit_depth=8 range=kSharpYuvRangeLimited
static const SharpYuvConversionMatrix kRec601LimitedMatrix = {
{16829, 33039, 6416, 16 << 16},
{-9714, -19071, 28784, 128 << 16},
{28784, -24103, -4681, 128 << 16},
};
// Kr=0.2990f Kb=0.1140f bits=8 range=kSharpYuvRangeFull
// Kr=0.2990f Kb=0.1140f bit_depth=8 range=kSharpYuvRangeFull
static const SharpYuvConversionMatrix kRec601FullMatrix = {
{19595, 38470, 7471, 0},
{-11058, -21710, 32768, 128 << 16},
{32768, -27439, -5329, 128 << 16},
};
// Kr=0.2126f Kb=0.0722f bits=8 range=kSharpYuvRangeLimited
// Kr=0.2126f Kb=0.0722f bit_depth=8 range=kSharpYuvRangeLimited
static const SharpYuvConversionMatrix kRec709LimitedMatrix = {
{11966, 40254, 4064, 16 << 16},
{-6596, -22189, 28784, 128 << 16},
{28784, -26145, -2639, 128 << 16},
};
// Kr=0.2126f Kb=0.0722f bits=8 range=kSharpYuvRangeFull
// Kr=0.2126f Kb=0.0722f bit_depth=8 range=kSharpYuvRangeFull
static const SharpYuvConversionMatrix kRec709FullMatrix = {
{13933, 46871, 4732, 0},
{-7509, -25259, 32768, 128 << 16},