From 4aed35ca73f6d9cfd5f7089ba5d04f5fb8623080 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 10 Apr 2017 04:54:30 -0300 Subject: [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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/media/common/v4l2-tpg/v4l2-tpg-core.c') 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); -- cgit