[PATCH v3 9/9] [media] vivid: Local optimization

From	Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH v3 9/9] [media] vivid: Local optimization
Date	2016-07-16 12:50 +0200
Message-ID	<rVvkt-2JU-9@gated-at.bofh.it> (permalink)
References	<rVvkt-2JU-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Avoid duplicated data shifts when possible.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 1c862465e335..2c23c458b1a6 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -919,13 +919,14 @@ static void precalculate_color(struct tpg_data *tpg, int k)
 			color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
 
 		if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
-			y = clamp(y, 16 << 4, 235 << 4);
-			cb = clamp(cb, 16 << 4, 240 << 4);
-			cr = clamp(cr, 16 << 4, 240 << 4);
+			y = clamp(y >> 4, 16, 235);
+			cb = clamp(cb >> 4, 16, 240);
+			cr = clamp(cr > 4, 16, 240);
+		} else {
+			y = clamp(y >> 4, 1, 254);
+			cb = clamp(cb >> 4, 1, 254);
+			cr = clamp(cr >> 4, 1, 254);
 		}
-		y = clamp(y >> 4, 1, 254);
-		cb = clamp(cb >> 4, 1, 254);
-		cr = clamp(cr >> 4, 1, 254);
 		switch (tpg->fourcc) {
 		case V4L2_PIX_FMT_YUV444:
 			y >>= 4;
-- 
2.8.1

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[PATCH v3 9/9] [media] vivid: Local optimization Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> - 2016-07-16 12:50 +0200
  Re: [PATCH v3 9/9] [media] vivid: Local optimization Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> - 2016-07-16 13:00 +0200

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