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[media] vivid: Introduce TPG_COLOR_ENC_LUMA 

Simplifies handling of Gray formats.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Ricardo Ribalda Delgado 2016-07-16 05:58:09 -03:00 committed by Mauro Carvalho Chehab
parent 25e9007349
commit ca2b32da59
3 changed files with 24 additions and 9 deletions
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26
drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
View File

@ -234,10 +234,12 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_ARGB32:
case V4L2_PIX_FMT_ABGR32:
tpg->color_enc = TGP_COLOR_ENC_RGB;
break;
case V4L2_PIX_FMT_GREY:
case V4L2_PIX_FMT_Y16:
case V4L2_PIX_FMT_Y16_BE:
tpg->color_enc = TGP_COLOR_ENC_RGB;
tpg->color_enc = TGP_COLOR_ENC_LUMA;
break;
case V4L2_PIX_FMT_YUV444:
case V4L2_PIX_FMT_YUV555:
@ -823,9 +825,9 @@ static void precalculate_color(struct tpg_data *tpg, int k)
g <<= 4;
b <<= 4;
}
if (tpg->qual == TPG_QUAL_GRAY || tpg->fourcc == V4L2_PIX_FMT_GREY ||
tpg->fourcc == V4L2_PIX_FMT_Y16 ||
tpg->fourcc == V4L2_PIX_FMT_Y16_BE) {
if (tpg->qual == TPG_QUAL_GRAY ||
tpg->color_enc == TGP_COLOR_ENC_LUMA) {
/* Rec. 709 Luma function */
/* (0.2126, 0.7152, 0.0722) * (255 * 256) */
r = g = b = (13879 * r + 46688 * g + 4713 * b) >> 16;
@ -865,8 +867,9 @@ static void precalculate_color(struct tpg_data *tpg, int k)
b = (b - (16 << 4)) * 255 / 219;
}
if (tpg->brightness != 128 || tpg->contrast != 128 ||
tpg->saturation != 128 || tpg->hue) {
if ((tpg->brightness != 128 || tpg->contrast != 128 ||
tpg->saturation != 128 || tpg->hue) &&
tpg->color_enc != TGP_COLOR_ENC_LUMA) {
/* Implement these operations */
int y, cb, cr;
int tmp_cb, tmp_cr;
@ -892,6 +895,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
return;
}
ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
} else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
tpg->color_enc == TGP_COLOR_ENC_LUMA) {
r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
r += (tpg->brightness << 4) - (128 << 4);
}
switch (tpg->color_enc) {
@ -942,6 +949,11 @@ static void precalculate_color(struct tpg_data *tpg, int k)
tpg->colors[k][2] = cr;
break;
}
case TGP_COLOR_ENC_LUMA:
{
tpg->colors[k][0] = r >> 4;
break;
}
case TGP_COLOR_ENC_RGB:
{
if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
@ -1983,6 +1995,8 @@ static const char *tpg_color_enc_str(enum tgp_color_enc
return "HSV";
case TGP_COLOR_ENC_YCBCR:
return "Y'CbCr";
case TGP_COLOR_ENC_LUMA:
return "Luma";
case TGP_COLOR_ENC_RGB:
default:
return "R'G'B";

6
drivers/media/platform/vivid/vivid-vid-common.c
View File

@ -184,7 +184,7 @@ struct vivid_fmt vivid_formats[] = {
.fourcc = V4L2_PIX_FMT_GREY,
.vdownsampling = { 1 },
.bit_depth = { 8 },
.color_enc = TGP_COLOR_ENC_YCBCR,
.color_enc = TGP_COLOR_ENC_LUMA,
.planes = 1,
.buffers = 1,
},
@ -192,7 +192,7 @@ struct vivid_fmt vivid_formats[] = {
.fourcc = V4L2_PIX_FMT_Y16,
.vdownsampling = { 1 },
.bit_depth = { 16 },
.color_enc = TGP_COLOR_ENC_YCBCR,
.color_enc = TGP_COLOR_ENC_LUMA,
.planes = 1,
.buffers = 1,
},
@ -200,7 +200,7 @@ struct vivid_fmt vivid_formats[] = {
.fourcc = V4L2_PIX_FMT_Y16_BE,
.vdownsampling = { 1 },
.bit_depth = { 16 },
.color_enc = TGP_COLOR_ENC_YCBCR,
.color_enc = TGP_COLOR_ENC_LUMA,
.planes = 1,
.buffers = 1,
},

1
include/media/v4l2-tpg.h
View File

@ -91,6 +91,7 @@ enum tgp_color_enc {
TGP_COLOR_ENC_RGB,
TGP_COLOR_ENC_YCBCR,
TGP_COLOR_ENC_HSV,
TGP_COLOR_ENC_LUMA,
};
extern const char * const tpg_aspect_strings[];