Messages in this thread | | | Subject | Re: [PATCH v2 7/8] media: hevc: Add scaling matrix control | From | Benjamin Gaignard <> | Date | Mon, 14 Jun 2021 09:43:00 +0200 |
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Le 14/06/2021 à 09:27, Hans Verkuil a écrit : > On 10/06/2021 17:44, Benjamin Gaignard wrote: >> 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. > Comparing H264 with HEVC I noticed that the corresponding flag for H264 is > called V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT. > > Should those names be aligned? Also, it is part of PPS for H264 and SPS in HEVC, > is that difference correct?
In ITU specifications ("7.4.3.2.1 General sequence parameter set RBSP semantics") this flag is define like that: scaling_list_enabled_flag equal to 1 specifies that a scaling list is used for the scaling process for transform coefficients. scaling_list_enabled_flag equal to 0 specifies that scaling list is not used for the scaling process for transform coefficients.
So for me the naming is correct.
Regards, Benjamin
> > Regards, > > Hans > >> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> >> --- >> version 2: >> - Fix structure name in ext-ctrls-codec.rst >> >> .../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 8c6e2a11ed95..d4f40bb85263 100644 >> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst >> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst >> @@ -3068,6 +3068,51 @@ 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_scaling_matrix >> + :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 53c0038c792b..0e5c4a2eecff 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 { >> @@ -224,6 +226,15 @@ 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) >> /* >>
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