media: uapi: h264: clarify num_ref_idx_l[01]_(default_)active fields

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Since the uapi does not contain the num_ref_idx_active_override_flag,
drivers for decoders that do not parse slices themselves don't know
how to choose between the num_ref_idx_l[01]_default_active and the
num_ref_idx_l[01]_active override fields.

Instead, userspace must set the override fields to the default values
if the slice does not have the num_ref_idx_active_override flag set.
The drivers will then always enable the override internally and ignore
the default fields completely.

Clarify this requirement in the API documentation.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

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Philipp Zabel 2019-09-10 07:22:39 -03:00 • committed by Mauro Carvalho Chehab

parent 8255b4d219

commit 187ef7c5c7

1 changed files with 4 additions and 2 deletions

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6

Documentation/media/uapi/v4l/ext-ctrls-codec.rst

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