diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2017-04-10 10:54:30 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-04-10 20:58:06 +0300 |
| commit | 4aed35ca73f6d9cfd5f7089ba5d04f5fb8623080 (patch) | |
| tree | d3bd2500617c8e9f534a65ad0c5f4ac613636649 /drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | |
| parent | 86c7eb411b2450dafee3b0ec5c4c191f83e6511f (diff) | |
| download | linux-4aed35ca73f6d9cfd5f7089ba5d04f5fb8623080.tar.xz | |
[media] v4l2-tpg: don't clamp XV601/709 to lim range
The XV601/709 encodings are special: they signal limited range, but use the full range
to encode a larger gamut with R', G' and B' values outside the [0-1] range.
So don't clamp to limited range for these two encodings.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/common/v4l2-tpg/v4l2-tpg-core.c')
| -rw-r--r-- | drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c index e47b46e2d26c..3dd22da7e17d 100644 --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c @@ -927,7 +927,14 @@ static void precalculate_color(struct tpg_data *tpg, int k) y >>= 4; cb >>= 4; cr >>= 4; - if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) { + /* + * XV601/709 use the header/footer margins to encode R', G' + * and B' values outside the range [0-1]. So do not clamp + * XV601/709 values. + */ + if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE && + tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV601 && + tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV709) { y = clamp(y, 16, 235); cb = clamp(cb, 16, 240); cr = clamp(cr, 16, 240); |