Commit 0b0393d5 authored by Jonas Karlman's avatar Jonas Karlman Committed by Mauro Carvalho Chehab

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: default avatarJonas Karlman <jonas@kwiboo.se>
Reviewed-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 1fd50a2c
......@@ -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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