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-rw-r--r--Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst22
1 files changed, 21 insertions, 1 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 8c6e2a11ed95..976d34445a24 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -1174,7 +1174,24 @@ enum v4l2_mpeg_video_h264_entropy_mode -
Cyclic intra macroblock refresh. This is the number of continuous
macroblocks refreshed every frame. Each frame a successive set of
macroblocks is refreshed until the cycle completes and starts from
- the top of the frame. Applicable to H264, H263 and MPEG4 encoder.
+ the top of the frame. Setting this control to zero means that
+ macroblocks will not be refreshed. Note that this control will not
+ take effect when ``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD`` control
+ is set to non zero value.
+ Applicable to H264, H263 and MPEG4 encoder.
+
+``V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD (integer)``
+ Intra macroblock refresh period. This sets the period to refresh
+ the whole frame. In other words, this defines the number of frames
+ for which the whole frame will be intra-refreshed. An example:
+ setting period to 1 means that the whole frame will be refreshed,
+ setting period to 2 means that the half of macroblocks will be
+ intra-refreshed on frameX and the other half of macroblocks
+ will be refreshed in frameX + 1 and so on. Setting the period to
+ zero means no period is specified.
+ Note that if the client sets this control to non zero value the
+ ``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB`` control shall be
+ ignored. Applicable to H264 and HEVC encoders.
``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)``
Frame level rate control enable. If this control is disabled then
@@ -3000,6 +3017,9 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
* - __u8
- ``pic_struct``
-
+ * - __u32
+ - ``slice_segment_addr``
+ -
* - __u8
- ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- The list of L0 reference elements as indices in the DPB.