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media: extended-controls.rst: update the mpeg2 compound controls

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The layout of the compound controls has changed to fix
32/64 bit alignment issues and the use of timestamps instead of
buffer indices to refer to buffers.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2018-12-05 05:30:55 -05:00 committed by Mauro Carvalho Chehab
parent d998e03e32
commit bb03641f8a
1 changed files with 17 additions and 11 deletions
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28
Documentation/media/uapi/v4l/extended-controls.rst
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@ -1546,17 +1546,23 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
- ``picture``
- Structure with MPEG-2 picture metadata, merging relevant fields from
the picture header and picture coding extension parts of the bitstream.
* - __u8
* - __u64
- ``backward_ref_ts``
- Timestamp of the V4L2 capture buffer to use as backward reference, used
with B-coded and P-coded frames. The timestamp refers to the
``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
:c:func:`v4l2_timeval_to_ns()` function to convert the struct
:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``forward_ref_ts``
- Timestamp for the V4L2 capture buffer to use as forward reference, used
with B-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u32
- ``quantiser_scale_code``
- Code used to determine the quantization scale to use for the IDCT.
* - __u8
- ``backward_ref_index``
- Index for the V4L2 buffer to use as backward reference, used with
B-coded and P-coded frames.
* - __u8
- ``forward_ref_index``
- Index for the V4L2 buffer to use as forward reference, used with
B-coded frames.
.. c:type:: v4l2_mpeg2_sequence
@ -1577,7 +1583,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
- ``vbv_buffer_size``
- Used to calculate the required size of the video buffering verifier,
defined (in bits) as: 16 * 1024 * vbv_buffer_size.
* - __u8
* - __u16
- ``profile_and_level_indication``
- The current profile and level indication as extracted from the
bitstream.
@ -1635,7 +1641,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u8
- ``repeat_first_field``
- This flag affects the decoding process of progressive frames.
* - __u8
* - __u16
- ``progressive_frame``
- Indicates whether the current frame is progressive.