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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2018-12-05 05:30:55 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-01-07 13:21:50 -0500 |
| commit | bb03641f8a0d7fc7efcdafb02a50aefe8ef1c17d (patch) | |
| tree | adb32f358339a842945d37a6eef1217b81d919c2 /Documentation/media/uapi/v4l/extended-controls.rst | |
| parent | d998e03e322fc497454f584adfc35743713a44c5 (diff) | |
| download | linux-0-day-bb03641f8a0d7fc7efcdafb02a50aefe8ef1c17d.tar.gz linux-0-day-bb03641f8a0d7fc7efcdafb02a50aefe8ef1c17d.tar.xz | |
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: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation/media/uapi/v4l/extended-controls.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/extended-controls.rst | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst index 286a2dd7ec36c..af4273aa5e851 100644 --- a/Documentation/media/uapi/v4l/extended-controls.rst +++ b/Documentation/media/uapi/v4l/extended-controls.rst @@ -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. |