From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
In order to be consistent with the other Y'CbCr encodings add
support for full range V4L2_YCBCR_ENC_BT2020.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/platform/vivid/vivid-tpg.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/vivid/vivid-tpg.c b/drivers/media/platform/vivid/vivid-tpg.c
index 59bdbae..a7ead15 100644
--- a/drivers/media/platform/vivid/vivid-tpg.c
+++ b/drivers/media/platform/vivid/vivid-tpg.c
@@ -489,6 +489,12 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
{ COEFF(-0.1396, 224), COEFF(-0.3604, 224), COEFF(0.5, 224) },
{ COEFF(0.5, 224), COEFF(-0.4598, 224), COEFF(-0.0402, 224) },
};
+ static const int bt2020_full[3][3] = {
+ { COEFF(0.2627, 255), COEFF(0.6780, 255), COEFF(0.0593, 255) },
+ { COEFF(-0.1396, 255), COEFF(-0.3604, 255), COEFF(0.5, 255) },
+ { COEFF(0.5, 255), COEFF(-0.4698, 255), COEFF(-0.0402, 255) },
+ };
+
bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
unsigned y_offset = full ? 0 : 16;
int lin_y, yc;
@@ -500,7 +506,7 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
rgb2ycbcr(full ? bt601_full : bt601, r, g, b, y_offset, y, cb, cr);
break;
case V4L2_YCBCR_ENC_BT2020:
- rgb2ycbcr(bt2020, r, g, b, 16, y, cb, cr);
+ rgb2ycbcr(full ? bt2020_full : bt2020, r, g, b, y_offset, y, cb, cr);
break;
case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
lin_y = (COEFF(0.2627, 255) * rec709_to_linear(r) +
@@ -582,6 +588,11 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
{ COEFF(1, 219), COEFF(-0.1646, 224), COEFF(-0.5714, 224) },
{ COEFF(1, 219), COEFF(1.8814, 224), COEFF(0, 224) },
};
+ static const int bt2020_full[3][3] = {
+ { COEFF(1, 255), COEFF(0, 255), COEFF(1.4746, 255) },
+ { COEFF(1, 255), COEFF(-0.1646, 255), COEFF(-0.5714, 255) },
+ { COEFF(1, 255), COEFF(1.8814, 255), COEFF(0, 255) },
+ };
bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
unsigned y_offset = full ? 0 : 16;
int lin_r, lin_g, lin_b, lin_y;
@@ -593,7 +604,7 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, y_offset, r, g, b);
break;
case V4L2_YCBCR_ENC_BT2020:
- ycbcr2rgb(bt2020, y, cb, cr, 16, r, g, b);
+ ycbcr2rgb(full ? bt2020_full : bt2020, y, cb, cr, y_offset, r, g, b);
break;
case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
y -= 16 << 4;
--
2.1.4
--
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