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Commit d90c8009 authored by Philipp Zabel's avatar Philipp Zabel Committed by Will McVicker
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UPSTREAM: media: v4l2-ctrl: Add control for h.264 chroma qp offset 



Allow to add fixed quantization parameter offset between luma and
chroma quantization parameters. This control directly corresponds
to the chroma_qp_index_offset field of the h.264 picture parameter
set.

Bug: 161414994
Change-Id: Ie07c7719908331cf993c87aca2e9078db0019b34
Signed-off-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+samsung@kernel.org>
(cherry picked from commit d034696cbe5a6e00f76ca4b7869c6cdef66aebd5)
Signed-off-by: default avatarWill McVicker <willmcvicker@google.com>
parent 94379da3

Documentation/media/uapi/v4l/extended-controls.rst

+6 −0
Original line number Diff line number Diff line
@@ -1141,6 +1141,12 @@ enum v4l2_mpeg_video_h264_entropy_mode - 
``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)``

    Enable 8X8 transform for H264. Applicable to the H264 encoder.





``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)``

    Specify the offset that should be added to the luma quantization

    parameter to determine the chroma quantization parameter. Applicable

    to the H264 encoder.



``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)``

    Cyclic intra macroblock refresh. This is the number of continuous

    macroblocks refreshed every frame. Each frame a successive set of

drivers/media/v4l2-core/v4l2-ctrls.c

+1 −0
Original line number Diff line number Diff line
@@ -825,6 +825,7 @@ const char *v4l2_ctrl_get_name(u32 id) 
	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";

	case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:

								return "H264 Set QP Value for HC Layers";

	case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET:	return "H264 Chroma QP Index Offset";

	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";

	case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP:		return "MPEG4 P-Frame QP Value";

	case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP:		return "MPEG4 B-Frame QP Value";

include/uapi/linux/v4l2-controls.h

+1 −0
Original line number Diff line number Diff line
@@ -531,6 +531,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type { 
};

#define V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER	(V4L2_CID_MPEG_BASE+381)

#define V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP	(V4L2_CID_MPEG_BASE+382)

#define V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET		(V4L2_CID_MPEG_BASE+384)

#define V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP	(V4L2_CID_MPEG_BASE+400)

#define V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP	(V4L2_CID_MPEG_BASE+401)

#define V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP	(V4L2_CID_MPEG_BASE+402)