Commit 6bde70da authored Jan 04, 2021 by Dikshita Agarwal Committed by Mauro Carvalho Chehab Jan 14, 2021

media: v4l2-ctrl: Add base layer priority id control.



This control indicates the priority id to be applied
to base layer.

[hverkuil: renumbered V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID]

Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

parent 74c89597

Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst

+9 −0

Original line number	Diff line number	Diff line
		@@ -3637,3 +3637,12 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
		- Selecting this value specifies that HEVC slices are expected
		to be prefixed by Annex B start codes. According to :ref:`hevc`
		valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.

		``V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (integer)``
		Specifies a priority identifier for the NAL unit, which will be applied to
		the base layer. By default this value is set to 0 for the base layer,
		and the next layer will have the priority ID assigned as 1, 2, 3 and so on.
		The video encoder can't decide the priority id to be applied to a layer,
		so this has to come from client.
		This is applicable to H264 and valid Range is from 0 to 63.
		Source Rec. ITU-T H.264 (06/2019); G.7.4.1.1, G.8.8.1.

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

+1 −0

Original line number	Diff line number	Diff line
		@@ -950,6 +950,7 @@ const char *v4l2_ctrl_get_name(u32 id)
		case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
		case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
		case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
		case V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID: return "Base Layer Priority ID";
		case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
		case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION: return "MPEG-2 Quantization Matrices";
		case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";

include/uapi/linux/v4l2-controls.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -427,6 +427,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
		#define V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (V4L2_CID_CODEC_BASE+227)
		#define V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (V4L2_CID_CODEC_BASE+228)
		#define V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (V4L2_CID_CODEC_BASE+229)
		#define V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (V4L2_CID_CODEC_BASE+230)

		/* CIDs for the MPEG-2 Part 2 (H.262) codec */
		#define V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL (V4L2_CID_CODEC_BASE+270)