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| author | Benjamin Gaignard <benjamin.gaignard@collabora.com> | 2021-07-15 18:12:22 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-09-30 11:07:38 +0300 |
| commit | 7ba59fb6c3b473dc0c76e87cd493388480c6dd27 (patch) | |
| tree | c4e57289d564f5d81e83c68537d15b7b57ac0be9 /Documentation/userspace-api | |
| parent | d2e86540366e1701baf852ee0301323ff113459c (diff) | |
| download | linux-7ba59fb6c3b473dc0c76e87cd493388480c6dd27.tar.xz | |
media: hevc: Add scaling matrix control
HEVC scaling lists are used for the scaling process for transform
coefficients.
V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED has to set when they are
encoded in the bitstream.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'Documentation/userspace-api')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 57 | ||||
| -rw-r--r-- | Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst | 6 |
2 files changed, 63 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst index 976d34445a24..e141f0e4eec9 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst @@ -3088,6 +3088,63 @@ enum v4l2_mpeg_video_hevc_size_of_length_field - \normalsize +``V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX (struct)`` + Specifies the HEVC scaling matrix parameters used for the scaling process + for transform coefficients. + These matrix and parameters are defined according to :ref:`hevc`. + They are described in section 7.4.5 "Scaling list data semantics" of + the specification. + +.. c:type:: v4l2_ctrl_hevc_scaling_matrix + +.. raw:: latex + + \scriptsize + +.. tabularcolumns:: |p{5.4cm}|p{6.8cm}|p{5.1cm}| + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_ctrl_hevc_scaling_matrix + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u8 + - ``scaling_list_4x4[6][16]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + * - __u8 + - ``scaling_list_8x8[6][64]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + * - __u8 + - ``scaling_list_16x16[6][64]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + * - __u8 + - ``scaling_list_32x32[2][64]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + * - __u8 + - ``scaling_list_dc_coef_16x16[6]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + * - __u8 + - ``scaling_list_dc_coef_32x32[2]`` + - Scaling list is used for the scaling process for transform + coefficients. The values on each scaling list are expected + in raster scan order. + +.. raw:: latex + + \normalsize + .. c:type:: v4l2_hevc_dpb_entry .. raw:: latex diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst index f9ecf6276129..2f491c17dd5d 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst @@ -495,6 +495,12 @@ See also the examples in :ref:`control`. - n/a - A struct :c:type:`v4l2_ctrl_hevc_slice_params`, containing HEVC slice parameters for stateless video decoders. + * - ``V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX`` + - n/a + - n/a + - n/a + - A struct :c:type:`v4l2_ctrl_hevc_scaling_matrix`, containing HEVC + scaling matrix for stateless video decoders. * - ``V4L2_CTRL_TYPE_VP8_FRAME`` - n/a - n/a |