Commit bb03641f authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab

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

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: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent d998e03e
...@@ -1546,17 +1546,23 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - ...@@ -1546,17 +1546,23 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
- ``picture`` - ``picture``
- Structure with MPEG-2 picture metadata, merging relevant fields from - Structure with MPEG-2 picture metadata, merging relevant fields from
the picture header and picture coding extension parts of the bitstream. 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`` - ``quantiser_scale_code``
- Code used to determine the quantization scale to use for the IDCT. - 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 .. c:type:: v4l2_mpeg2_sequence
...@@ -1577,7 +1583,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - ...@@ -1577,7 +1583,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
- ``vbv_buffer_size`` - ``vbv_buffer_size``
- Used to calculate the required size of the video buffering verifier, - Used to calculate the required size of the video buffering verifier,
defined (in bits) as: 16 * 1024 * vbv_buffer_size. defined (in bits) as: 16 * 1024 * vbv_buffer_size.
* - __u8 * - __u16
- ``profile_and_level_indication`` - ``profile_and_level_indication``
- The current profile and level indication as extracted from the - The current profile and level indication as extracted from the
bitstream. bitstream.
...@@ -1635,7 +1641,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - ...@@ -1635,7 +1641,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
* - __u8 * - __u8
- ``repeat_first_field`` - ``repeat_first_field``
- This flag affects the decoding process of progressive frames. - This flag affects the decoding process of progressive frames.
* - __u8 * - __u16
- ``progressive_frame`` - ``progressive_frame``
- Indicates whether the current frame is progressive. - Indicates whether the current frame is progressive.
......
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