Re: [PATCH 7/8] media: hevc: Add scaling matrix control

From: Benjamin Gaignard
Date: Mon Jun 07 2021 - 03:23:33 EST


Le 06/06/2021 à 09:49, Jernej Škrabec a écrit :
Hi!

Dne petek, 04. junij 2021 ob 15:06:18 CEST je Benjamin Gaignard napisal(a):
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@xxxxxxxxxxxxx>
---
.../media/v4l/ext-ctrls-codec.rst | 45 +++++++++++++++++++
.../media/v4l/vidioc-queryctrl.rst | 6 +++
drivers/media/v4l2-core/v4l2-ctrls-core.c | 6 +++
drivers/media/v4l2-core/v4l2-ctrls-defs.c | 4 ++
include/media/hevc-ctrls.h | 11 +++++
5 files changed, 72 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 9120c5bcaf90..a4512b7cb520 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -3065,6 +3065,51 @@ 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_slice_params
^ copy paste error? It should be v4l2_ctrl_hevc_scaling_matrix.

Yes I will fix it in the next version.
Thanks

Benjamin


Best regards,
Jernej

+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 2
+
+ * - __u8
+ - ``scaling_list_4x4[6][16]``
+ -
+ * - __u8
+ - ``scaling_list_8x8[6][64]``
+ -
+ * - __u8
+ - ``scaling_list_16x16[6][64]``
+ -
+ * - __u8
+ - ``scaling_list_32x32[2][64]``
+ -
+ * - __u8
+ - ``scaling_list_dc_coef_16x16[6]``
+ -
+ * - __u8
+ - ``scaling_list_dc_coef_32x32[2]``
+ -
+
+.. 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
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-
core/v4l2-ctrls-core.c
index c4b5082849b6..70adfc1b9c81 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
@@ -687,6 +687,9 @@ static int std_validate_compound(const struct v4l2_ctrl
*ctrl, u32 idx,
break;
+ case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
+ break;
+
case V4L2_CTRL_TYPE_AREA:
area = p;
if (!area->width || !area->height)
@@ -1240,6 +1243,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
break;
+ case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
+ elem_size = sizeof(struct
v4l2_ctrl_hevc_scaling_matrix);
+ break;
case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
elem_size = sizeof(struct
v4l2_ctrl_hevc_decode_params);
break;
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-
core/v4l2-ctrls-defs.c
index b6344bbf1e00..cb29c2a7fabe 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
@@ -996,6 +996,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_HEVC_SPS:
return "HEVC Sequence Parameter Set";
case V4L2_CID_MPEG_VIDEO_HEVC_PPS:
return "HEVC Picture Parameter Set";
case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return
"HEVC Slice Parameters";
+ case V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX:
return "HEVC Scaling Matrix";
case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS:
return "HEVC Decode Parameters";
case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC
Decode Mode";
case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return
"HEVC Start Code";
@@ -1488,6 +1489,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum
v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
*type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
break;
+ case V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX:
+ *type = V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX;
+ break;
case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS:
*type = V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS;
break;
diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
index dc964ff7cd29..da6189ef7ab4 100644
--- a/include/media/hevc-ctrls.h
+++ b/include/media/hevc-ctrls.h
@@ -19,6 +19,7 @@
#define V4L2_CID_MPEG_VIDEO_HEVC_SPS (V4L2_CID_CODEC_BASE +
1008)
#define V4L2_CID_MPEG_VIDEO_HEVC_PPS (V4L2_CID_CODEC_BASE +
1009)
#define V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (V4L2_CID_CODEC_BASE +
1010)
+#define V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX (V4L2_CID_CODEC_BASE +
1011)
#define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS (V4L2_CID_CODEC_BASE +
1012)
#define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (V4L2_CID_CODEC_BASE +
1015)
#define V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (V4L2_CID_CODEC_BASE +
1016)
@@ -27,6 +28,7 @@
#define V4L2_CTRL_TYPE_HEVC_SPS 0x0120
#define V4L2_CTRL_TYPE_HEVC_PPS 0x0121
#define V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS 0x0122
+#define V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX 0x0123
#define V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS 0x0124
enum v4l2_mpeg_video_hevc_decode_mode {
@@ -225,6 +227,15 @@ struct v4l2_ctrl_hevc_decode_params {
__u64 flags;
};
+struct v4l2_ctrl_hevc_scaling_matrix {
+ __u8 scaling_list_4x4[6][16];
+ __u8 scaling_list_8x8[6][64];
+ __u8 scaling_list_16x16[6][64];
+ __u8 scaling_list_32x32[2][64];
+ __u8 scaling_list_dc_coef_16x16[6];
+ __u8 scaling_list_dc_coef_32x32[2];
+};
+
/* MPEG-class control IDs specific to the Hantro driver as defined by V4L2
*/
#define V4L2_CID_CODEC_HANTRO_BASE
(V4L2_CTRL_CLASS_CODEC | 0x1200)
/*