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| author | Dikshita Agarwal <dikshita@codeaurora.org> | 2021-01-04 08:41:53 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-14 15:54:00 +0300 |
| commit | 6bde70da98f6b5f5dbd61d2fa9c1e7efe83b0402 (patch) | |
| tree | 28adc5f2cd5f1ca162ad7e7180a48756e3d81616 /Documentation/userspace-api | |
| parent | 74c895974fd3566806ea3ce42f9bb660eb54b696 (diff) | |
| download | linux-6bde70da98f6b5f5dbd61d2fa9c1e7efe83b0402.tar.xz | |
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>
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst index 400774ceffaa..00944e97d638 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst @@ -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. |