This control indicates the priority id to be applied
to base layer.
Signed-off-by: Dikshita Agarwal <dikshita@xxxxxxxxxxxxxx>
---
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 9 +++++++++
drivers/media/v4l2-core/v4l2-ctrls.c | 1 +
include/uapi/linux/v4l2-controls.h | 1 +
3 files changed, 11 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 1675bcf..24df818 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -3655,3 +3655,12 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
This provides a bitmask which consists of bits [0, LTR_COUNT-1].
This is applicable to H264 and HEVC encoder and can be applied using
Request Api.
+
+``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
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 2ad6b5a..9bd795f 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -953,6 +953,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_LTR_COUNT: return "LTR Count";
case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX: return "frame LTR index";
case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES: return "Use LTR Frames";
+ 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";
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index c0bb87b..404e69c 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -425,6 +425,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
#define V4L2_CID_MPEG_VIDEO_LTR_COUNT (V4L2_CID_CODEC_BASE+230)
#define V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX (V4L2_CID_CODEC_BASE+231)
#define V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES (V4L2_CID_CODEC_BASE+232)
+#define V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (V4L2_CID_CODEC_BASE+233)
/* CIDs for the MPEG-2 Part 2 (H.262) codec */
#define V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL (V4L2_CID_CODEC_BASE+270)
--
2.7.4
