From 0b0393d59eb4a58456d128a782c42f924eedab16 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Tue, 29 Oct 2019 01:00:51 +0100
Subject: [PATCH] media: uapi: h264: clarify expected scaling_list_4x4/8x8
order
Clarify that the expected order of scaling lists should follow the order
they are listed in the H264 standard.
The expected scaling list order,
for 4x4: Intra Y, Intra Cb, Intra Cr, Inter Y, Inter Cb, Inter Cr,
for 8x8: Intra Y, Inter Y, Intra Cb, Inter Cb, Intra Cr, Inter Cr.
Also clarify that the values in a scaling list should be in matrix order,
the same value order that vaapi, vdpau and nvdec use.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
---
Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index a1209f68c5e8c..28313c0f4e7cc 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -1713,10 +1713,14 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u8
- ``scaling_list_4x4[6][16]``
- -
+ - Scaling matrix after applying the inverse scanning process.
+ Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y,
+ Inter Cb, Inter Cr.
* - __u8
- ``scaling_list_8x8[6][64]``
- -
+ - Scaling matrix after applying the inverse scanning process.
+ Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb,
+ Intra Cr, Inter Cr.
``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)``
Specifies the slice parameters (as extracted from the bitstream)
--
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