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151 lines
5.4 KiB
Diff
151 lines
5.4 KiB
Diff
From 70b5a28786215c996503210abd3e44c200771640 Mon Sep 17 00:00:00 2001
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From: Jernej Skrabec <jernej.skrabec@siol.net>
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Date: Fri, 13 Dec 2019 17:04:25 +0100
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Subject: [PATCH] media: uapi: hevc: Add scaling matrix control
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Taken from https://patchwork.linuxtv.org/patch/60728/
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Changes (mainly documentation) have been requested.
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HEVC has a scaling matrix concept. Add support for it.
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Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
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---
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.../media/uapi/v4l/ext-ctrls-codec.rst | 41 +++++++++++++++++++
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.../media/uapi/v4l/pixfmt-compressed.rst | 1 +
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drivers/media/v4l2-core/v4l2-ctrls.c | 10 +++++
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include/media/hevc-ctrls.h | 11 +++++
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4 files changed, 63 insertions(+)
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--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
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+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
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@@ -4174,6 +4174,47 @@ enum v4l2_mpeg_video_hevc_size_of_length
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- ``padding[6]``
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- Applications and drivers must set this to zero.
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+``V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX (struct)``
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+ Specifies the scaling matrix (as extracted from the bitstream) for
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+ the associated HEVC slice data. The bitstream parameters are
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+ defined according to :ref:`hevc`, section 7.4.5 "Scaling list
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+ data semantics". For further documentation, refer to the above
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+ specification, unless there is an explicit comment stating
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+ otherwise.
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+
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+ .. note::
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+
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+ This compound control is not yet part of the public kernel API and
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+ it is expected to change.
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+
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+.. c:type:: v4l2_ctrl_hevc_scaling_matrix
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+
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+.. cssclass:: longtable
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+
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+.. flat-table:: struct v4l2_ctrl_hevc_scaling_matrix
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+ :header-rows: 0
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+ :stub-columns: 0
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+ :widths: 1 1 2
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+
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+ * - __u8
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+ - ``scaling_list_4x4[6][16]``
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+ -
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+ * - __u8
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+ - ``scaling_list_8x8[6][64]``
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+ -
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+ * - __u8
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+ - ``scaling_list_16x16[6][64]``
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+ -
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+ * - __u8
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+ - ``scaling_list_32x32[2][64]``
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+ -
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+ * - __u8
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+ - ``scaling_list_dc_coef_16x16[6]``
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+ -
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+ * - __u8
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+ - ``scaling_list_dc_coef_32x32[2]``
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+ -
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+
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``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)``
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Specifies the decoding mode to use. Currently exposes slice-based and
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frame-based decoding but new modes might be added later on.
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--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
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+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
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@@ -203,6 +203,7 @@ Compressed Formats
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* ``V4L2_CID_MPEG_VIDEO_HEVC_SPS``
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* ``V4L2_CID_MPEG_VIDEO_HEVC_PPS``
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* ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS``
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+ * ``V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX``
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See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`.
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Buffers associated with this pixel format must contain the appropriate
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number of macroblocks to decode a full corresponding frame.
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--- a/drivers/media/v4l2-core/v4l2-ctrls.c
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+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
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@@ -974,6 +974,7 @@ const char *v4l2_ctrl_get_name(u32 id)
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case V4L2_CID_MPEG_VIDEO_HEVC_SPS: return "HEVC Sequence Parameter Set";
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case V4L2_CID_MPEG_VIDEO_HEVC_PPS: return "HEVC Picture Parameter Set";
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case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters";
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+ case V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX: return "HEVC Scaling Matrix";
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case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode";
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case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code";
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@@ -1406,6 +1407,9 @@ void v4l2_ctrl_fill(u32 id, const char *
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case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
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*type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
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break;
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+ case V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX:
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+ *type = V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX;
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+ break;
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case V4L2_CID_UNIT_CELL_SIZE:
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*type = V4L2_CTRL_TYPE_AREA;
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*flags |= V4L2_CTRL_FLAG_READ_ONLY;
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@@ -1852,6 +1856,9 @@ static int std_validate_compound(const s
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zero_padding(*p_hevc_slice_params);
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break;
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+ case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
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+ break;
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+
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case V4L2_CTRL_TYPE_AREA:
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area = p;
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if (!area->width || !area->height)
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@@ -2540,6 +2547,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(s
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case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
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elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
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break;
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+ case V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX:
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+ elem_size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix);
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+ break;
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case V4L2_CTRL_TYPE_AREA:
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elem_size = sizeof(struct v4l2_area);
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break;
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--- a/include/media/hevc-ctrls.h
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+++ b/include/media/hevc-ctrls.h
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@@ -19,6 +19,7 @@
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#define V4L2_CID_MPEG_VIDEO_HEVC_SPS (V4L2_CID_MPEG_BASE + 1008)
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#define V4L2_CID_MPEG_VIDEO_HEVC_PPS (V4L2_CID_MPEG_BASE + 1009)
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#define V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (V4L2_CID_MPEG_BASE + 1010)
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+#define V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX (V4L2_CID_MPEG_BASE + 1011)
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#define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (V4L2_CID_MPEG_BASE + 1015)
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#define V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (V4L2_CID_MPEG_BASE + 1016)
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@@ -26,6 +27,7 @@
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#define V4L2_CTRL_TYPE_HEVC_SPS 0x0120
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#define V4L2_CTRL_TYPE_HEVC_PPS 0x0121
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#define V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS 0x0122
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+#define V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX 0x0123
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enum v4l2_mpeg_video_hevc_decode_mode {
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V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED,
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@@ -209,4 +211,13 @@ struct v4l2_ctrl_hevc_slice_params {
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__u64 flags;
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};
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+struct v4l2_ctrl_hevc_scaling_matrix {
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+ __u8 scaling_list_4x4[6][16];
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+ __u8 scaling_list_8x8[6][64];
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+ __u8 scaling_list_16x16[6][64];
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+ __u8 scaling_list_32x32[2][64];
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+ __u8 scaling_list_dc_coef_16x16[6];
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+ __u8 scaling_list_dc_coef_32x32[2];
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+};
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+
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#endif
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