To explain why num_ref_idx_active_override_flag is not part of the API,
describe how the num_ref_idx_l[01]_active_minus1 fields and the
num_ref_idx_l[01]_default_active_minus1 fields are used, depending on
whether the decoder parses slice headers itself or not.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index bc5dd8e76567..b9834625a939 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -1630,10 +1630,10 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
-
* - __u8
- ``num_ref_idx_l0_default_active_minus1``
- -
+ - This field is only used by decoders that parse slices themselves.
* - __u8
- ``num_ref_idx_l1_default_active_minus1``
- -
+ - This field is only used by decoders that parse slices themselves.
* - __u8
- ``weighted_bipred_idc``
-
@@ -1820,10 +1820,14 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
-
* - __u8
- ``num_ref_idx_l0_active_minus1``
- -
+ - This field is used by decoders that do not parse slices themselves.
+ If num_ref_idx_active_override_flag is not set, this field must be
+ set to the value of num_ref_idx_l0_default_active_minus1.
* - __u8
- ``num_ref_idx_l1_active_minus1``
- -
+ - This field is used by decoders that do not parse slices themselves.
+ If num_ref_idx_active_override_flag is not set, this field must be
+ set to the value of num_ref_idx_l1_default_active_minus1.
* - __u32
- ``slice_group_change_cycle``
-
--
2.20.1
