linux-kernel - [PATCH 16/18] media: coda: Update default velues of QP for mpeg4 I/P

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Message-Id: <20250314152939.2759573-17-serghox@gmail.com>
Date: Fri, 14 Mar 2025 18:29:37 +0300
From: Sergey Khimich <serghox@...il.com>
To: linux-media@...r.kernel.org
Cc: Philipp Zabel <p.zabel@...gutronix.de>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-kernel@...r.kernel.org,
	Vladimir Yakovlev <vovchkir@...il.com>,
	Maksim Turok <turok.m7@...il.com>
Subject: [PATCH 16/18] media: coda: Update default velues of QP for mpeg4 I/P

From: Vladimir Yakovlev <vovchkir@...il.com>

Use average values of QP range for mpeg4 I/P frames.
In such case we get smaller size of output buffer
and average quality of image.

Co-developed-by: Sergey Khimich <serghox@...il.com>
Signed-off-by: Sergey Khimich <serghox@...il.com>
Signed-off-by: Vladimir Yakovlev <vovchkir@...il.com>
---
 drivers/media/platform/chips-media/coda/coda-common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/chips-media/coda/coda-common.c b/drivers/media/platform/chips-media/coda/coda-common.c
index 9ca459793050..3782219c8a2b 100644
--- a/drivers/media/platform/chips-media/coda/coda-common.c
+++ b/drivers/media/platform/chips-media/coda/coda-common.c
@@ -2379,9 +2379,9 @@ static void coda_encode_ctrls(struct coda_ctx *ctx)
 			V4L2_MPEG_VIDEO_H264_LEVEL_4_0);
 	}
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
-		V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP, 1, 31, 1, 2);
+		V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP, 1, 31, 1, 15);
 	v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
-		V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP, 1, 31, 1, 2);
+		V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP, 1, 31, 1, 15);
 	v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
 		V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE,
 		V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE, 0x0,
-- 
2.30.2