diff options
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/auxiliary/vl/vl_csc.c | 55 |
1 files changed, 17 insertions, 38 deletions
diff --git a/src/gallium/auxiliary/vl/vl_csc.c b/src/gallium/auxiliary/vl/vl_csc.c index 1587e6cf1df..d70ab14d323 100644 --- a/src/gallium/auxiliary/vl/vl_csc.c +++ b/src/gallium/auxiliary/vl/vl_csc.c @@ -108,18 +108,6 @@ static const vl_csc_matrix bt_601 = }; /* - * Converts ITU-R BT.601 YCbCr pixels to RGB pixels where: - * Y is in [16,235], Cb and Cr are in [16,240] - * R, G, and B are in [0,255] - */ -static const vl_csc_matrix bt_601_full = -{ - { 1.164f, 0.0f, 1.596f, 0.0f, }, - { 1.164f, -0.391f, -0.813f, 0.0f, }, - { 1.164f, 2.018f, 0.0f, 0.0f, } -}; - -/* * Converts ITU-R BT.709 YCbCr pixels to RGB pixels where: * Y is in [16,235], Cb and Cr are in [16,240] * R, G, and B are in [16,235] @@ -132,29 +120,15 @@ static const vl_csc_matrix bt_709 = }; /* - * Converts ITU-R BT.709 YCbCr pixels to RGB pixels where: + * Converts SMPTE 240M YCbCr pixels to RGB pixels where: * Y is in [16,235], Cb and Cr are in [16,240] - * R, G, and B are in [0,255] + * R, G, and B are in [16,235] */ -static const vl_csc_matrix bt_709_full = -{ - { 1.164f, 0.0f, 1.793f, 0.0f, }, - { 1.164f, -0.213f, -0.534f, 0.0f, }, - { 1.164f, 2.115f, 0.0f, 0.0f, } -}; - static const vl_csc_matrix smpte240m = { - { 1.0f, 0.0f, 1.582f, 0.0f, }, - { 1.0f, -0.228f, -0.478f, 0.0f, }, - { 1.0f, 1.833f, 0.0f, 0.0f, } -}; - -static const vl_csc_matrix smpte240m_full = -{ - { 1.164f, 0.0f, 1.794f, 0.0f, }, - { 1.164f, -0.258f, -0.543f, 0.0f, }, - { 1.164f, 2.079f, 0.0f, 0.0f, } + { 1.0f, 0.0f, 1.541f, 0.0f, }, + { 1.0f, -0.221f, -0.466f, 0.0f, }, + { 1.0f, 1.785f, 0.0f, 0.0f, } }; static const vl_csc_matrix identity = @@ -176,7 +150,6 @@ void vl_csc_get_matrix(enum VL_CSC_COLOR_STANDARD cs, bool full_range, vl_csc_matrix *matrix) { - float ybias = full_range ? -16.0f/255.0f : 0.0f; float cbbias = -128.0f/255.0f; float crbias = -128.0f/255.0f; @@ -188,17 +161,23 @@ void vl_csc_get_matrix(enum VL_CSC_COLOR_STANDARD cs, const vl_csc_matrix *cstd; + if (full_range) { + c *= 1.164f; /* Adjust for the y range */ + b *= 1.164f; /* Adjust for the y range */ + b -= c * 16.0f / 255.0f; /* Adjust for the y bias */ + } + assert(matrix); switch (cs) { case VL_CSC_COLOR_STANDARD_BT_601: - cstd = full_range ? &bt_601_full : &bt_601; + cstd = &bt_601; break; case VL_CSC_COLOR_STANDARD_BT_709: - cstd = full_range ? &bt_709_full : &bt_709; + cstd = &bt_709; break; case VL_CSC_COLOR_STANDARD_SMPTE_240M: - cstd = full_range ? &smpte240m_full : &smpte240m; + cstd = &smpte240m; break; case VL_CSC_COLOR_STANDARD_IDENTITY: default: @@ -210,21 +189,21 @@ void vl_csc_get_matrix(enum VL_CSC_COLOR_STANDARD cs, (*matrix)[0][0] = c * (*cstd)[0][0]; (*matrix)[0][1] = c * (*cstd)[0][1] * s * cosf(h) - c * (*cstd)[0][2] * s * sinf(h); (*matrix)[0][2] = c * (*cstd)[0][2] * s * cosf(h) + c * (*cstd)[0][1] * s * sinf(h); - (*matrix)[0][3] = (*cstd)[0][3] + (*cstd)[0][0] * (b + c * ybias) + + (*matrix)[0][3] = (*cstd)[0][3] + (*cstd)[0][0] * b + (*cstd)[0][1] * (c * cbbias * s * cosf(h) + c * crbias * s * sinf(h)) + (*cstd)[0][2] * (c * crbias * s * cosf(h) - c * cbbias * s * sinf(h)); (*matrix)[1][0] = c * (*cstd)[1][0]; (*matrix)[1][1] = c * (*cstd)[1][1] * s * cosf(h) - c * (*cstd)[1][2] * s * sinf(h); (*matrix)[1][2] = c * (*cstd)[1][2] * s * cosf(h) + c * (*cstd)[1][1] * s * sinf(h); - (*matrix)[1][3] = (*cstd)[1][3] + (*cstd)[1][0] * (b + c * ybias) + + (*matrix)[1][3] = (*cstd)[1][3] + (*cstd)[1][0] * b + (*cstd)[1][1] * (c * cbbias * s * cosf(h) + c * crbias * s * sinf(h)) + (*cstd)[1][2] * (c * crbias * s * cosf(h) - c * cbbias * s * sinf(h)); (*matrix)[2][0] = c * (*cstd)[2][0]; (*matrix)[2][1] = c * (*cstd)[2][1] * s * cosf(h) - c * (*cstd)[2][2] * s * sinf(h); (*matrix)[2][2] = c * (*cstd)[2][2] * s * cosf(h) + c * (*cstd)[2][1] * s * sinf(h); - (*matrix)[2][3] = (*cstd)[2][3] + (*cstd)[2][0] * (b + c * ybias) + + (*matrix)[2][3] = (*cstd)[2][3] + (*cstd)[2][0] * b + (*cstd)[2][1] * (c * cbbias * s * cosf(h) + c * crbias * s * sinf(h)) + (*cstd)[2][2] * (c * crbias * s * cosf(h) - c * cbbias * s * sinf(h)); } |