From: Hans Verkuil <hans.verk...@cisco.com>
In order to be consistent with the other Y'CbCr encodings add
support for full range V4L2_YCBCR_ENC_SMPTE240M.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/platform/vivid/vivid-tpg.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/vivid/vivid-tpg.c
b/drivers/media/platform/vivid/vivid-tpg.c
index 69cd8fb..59bdbae 100644
--- a/drivers/media/platform/vivid/vivid-tpg.c
+++ b/drivers/media/platform/vivid/vivid-tpg.c
@@ -479,6 +479,11 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r,
int g, int b,
{ COEFF(-0.116, 224), COEFF(-0.384, 224), COEFF(0.5, 224) },
{ COEFF(0.5, 224), COEFF(-0.445, 224), COEFF(-0.055, 224) },
};
+ static const int smpte240m_full[3][3] = {
+ { COEFF(0.212, 255), COEFF(0.701, 255), COEFF(0.087, 255) },
+ { COEFF(-0.116, 255), COEFF(-0.384, 255), COEFF(0.5, 255) },
+ { COEFF(0.5, 255), COEFF(-0.445, 255), COEFF(-0.055, 255) },
+ };
static const int bt2020[3][3] = {
{ COEFF(0.2627, 219), COEFF(0.6780, 219), COEFF(0.0593, 219)
},
{ COEFF(-0.1396, 224), COEFF(-0.3604, 224), COEFF(0.5, 224)
},
@@ -513,7 +518,7 @@ static void color_to_ycbcr(struct tpg_data *tpg, int r, int
g, int b,
*cr = (((r - yc) * COEFF(1.0 / 0.9936, 224)) >> 16) +
(128 << 4);
break;
case V4L2_YCBCR_ENC_SMPTE240M:
- rgb2ycbcr(smpte240m, r, g, b, 16, y, cb, cr);
+ rgb2ycbcr(full ? smpte240m_full : smpte240m, r, g, b, y_offset,
y, cb, cr);
break;
case V4L2_YCBCR_ENC_709:
case V4L2_YCBCR_ENC_XV709:
@@ -567,6 +572,11 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y,
int cb, int cr,
{ COEFF(1, 219), COEFF(-0.2253, 224), COEFF(-0.4767, 224) },
{ COEFF(1, 219), COEFF(1.8270, 224), COEFF(0, 224) },
};
+ static const int smpte240m_full[3][3] = {
+ { COEFF(1, 255), COEFF(0, 255), COEFF(1.5756, 255) },
+ { COEFF(1, 255), COEFF(-0.2253, 255), COEFF(-0.4767, 255) },
+ { COEFF(1, 255), COEFF(1.8270, 255), COEFF(0, 255) },
+ };
static const int bt2020[3][3] = {
{ COEFF(1, 219), COEFF(0, 224), COEFF(1.4746, 224) },
{ COEFF(1, 219), COEFF(-0.1646, 224), COEFF(-0.5714, 224) },
@@ -610,7 +620,7 @@ static void ycbcr_to_color(struct tpg_data *tpg, int y, int
cb, int cr,
*g = linear_to_rec709(lin_g >> 12);
break;
case V4L2_YCBCR_ENC_SMPTE240M:
- ycbcr2rgb(smpte240m, y, cb, cr, 16, r, g, b);
+ ycbcr2rgb(full ? smpte240m_full : smpte240m, y, cb, cr,
y_offset, r, g, b);
break;
case V4L2_YCBCR_ENC_709:
case V4L2_YCBCR_ENC_XV709:
--
2.1.4
--
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