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Message-ID: <CAC-pXoMERLQuOKNtM81PM2uJszgXCrR22EDjMKFEQ72u9t8++Q@mail.gmail.com>
Date: Mon, 20 Nov 2023 10:09:38 -0800
From: Steve Cho <stevecho@...omium.org>
To: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
Cc: Hugues Fruchet <hugues.fruchet@...s.st.com>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Philipp Zabel <p.zabel@...gutronix.de>,
Nicolas Dufresne <nicolas.dufresne@...labora.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Daniel Almeida <daniel.almeida@...labora.com>,
Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
Heiko Stuebner <heiko@...ech.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Hans Verkuil <hverkuil@...all.nl>, linux-media@...r.kernel.org,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
linux-stm32@...md-mailman.stormreply.com,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
Marco Felsch <m.felsch@...gutronix.de>,
Adam Ford <aford173@...il.com>
Subject: Re: [RFC 1/6] media: uapi: Add VP8 stateless encoder controls
Thank you Andrzej for the follow up!
On Mon, Nov 20, 2023 at 8:43 AM Andrzej Pietrasiewicz
<andrzej.p@...labora.com> wrote:
>
> Hi Steve,
>
> Thanks for looking into it,
>
> W dniu 14.11.2023 o 23:19, Steve Cho pisze:
> > Few comments.
> >
> >> + if (p_vp8_encode_params->loop_filter_level > 63)
> >> + return -EINVAL;
> >> +
> >> + if (p_vp8_encode_params->sharpness_level > 7)
> >> + return -EINVAL;
> >
> > Can we define these magic numbers 63, 7?
>
> ok
>
> >
> >
> >> + case V4L2_CID_STATELESS_VP8_ENCODE_QP: return "VP8 Encode QP";
> >
> > Can we add more details about this CID? Or let me know if I missed it
> > somewhere in the series.
>
> The documenation was missing indeed, which was mentioned in the cover letter.
>
> >
> >
> >> +#define V4L2_CID_STATELESS_VP8_ENCODE_PARAMS (V4L2_CID_CODEC_STATELESS_BASE + 601)
> >
> > Can we put 2 CIDs in the same place? I think it is more readable that
> > way. I also see that was the case for HEVC.
> > https://git.linuxtv.org/media_tree.git/tree/include/uapi/linux/v4l2-controls.h?h=master&id=c91fd7b7a8ae17ab8be0b6e765e4a38783749330#n2062
>
> If there's "prior art" for that, I see no objections.
>
> >
> >
> >> + * @loop_filter_level: sets the strength of the applied loop filter.
> >> + * Set to a value from the rage 0..63.
> >
> > typo s/rage/range/
>
> Thanks for spotting it, this rage should be stopped ;)
>
> >
> >
> >> + * @copy_buffer_to_alternate: specifies the atlref frame refresh strategy.
> >> + * Set to one of V4L2_VP8_FRAME_FLAG_ALTREF_{}.
> >
> > nit: typo s/atlref/altref/
>
> Thanks!
>
> Regards,
>
> Andrzej
>
> >
> > On Wed, Oct 4, 2023 at 3:37 AM Hugues Fruchet
> > <hugues.fruchet@...s.st.com> wrote:
> >>
> >> From: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
> >>
> >> Add uAPI for stateless VP8 encoders.
> >>
> >> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
> >> ---
> >> drivers/media/v4l2-core/v4l2-ctrls-core.c | 13 ++++
> >> drivers/media/v4l2-core/v4l2-ctrls-defs.c | 5 ++
> >> include/media/v4l2-ctrls.h | 2 +
> >> include/uapi/linux/v4l2-controls.h | 91 +++++++++++++++++++++++
> >> include/uapi/linux/videodev2.h | 3 +
> >> 5 files changed, 114 insertions(+)
> >>
> >> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c
> >> index a662fb60f73f..c7799ceb3d6d 100644
> >> --- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
> >> +++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
> >> @@ -811,6 +811,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
> >> struct v4l2_ctrl_hevc_pps *p_hevc_pps;
> >> struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
> >> struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
> >> + struct v4l2_ctrl_vp8_encode_params *p_vp8_encode_params;
> >> struct v4l2_area *area;
> >> void *p = ptr.p + idx * ctrl->elem_size;
> >> unsigned int i;
> >> @@ -1047,6 +1048,15 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
> >> zero_padding(p_vp8_frame->coder_state);
> >> break;
> >>
> >> + case V4L2_CTRL_TYPE_VP8_ENCODE_PARAMS:
> >> + p_vp8_encode_params = p;
> >> + if (p_vp8_encode_params->loop_filter_level > 63)
> >> + return -EINVAL;
> >> +
> >> + if (p_vp8_encode_params->sharpness_level > 7)
> >> + return -EINVAL;
> >> + break;
> >> +
> >> case V4L2_CTRL_TYPE_HEVC_SPS:
> >> p_hevc_sps = p;
> >>
> >> @@ -1868,6 +1878,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
> >> case V4L2_CTRL_TYPE_AREA:
> >> elem_size = sizeof(struct v4l2_area);
> >> break;
> >> + case V4L2_CTRL_TYPE_VP8_ENCODE_PARAMS:
> >> + elem_size = sizeof(struct v4l2_ctrl_vp8_encode_params);
> >> + break;
> >> default:
> >> if (type < V4L2_CTRL_COMPOUND_TYPES)
> >> elem_size = sizeof(s32);
> >> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> >> index 8696eb1cdd61..bd26f1d89bd5 100644
> >> --- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> >> +++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> >> @@ -1236,6 +1236,8 @@ const char *v4l2_ctrl_get_name(u32 id)
> >> case V4L2_CID_STATELESS_AV1_TILE_GROUP_ENTRY: return "AV1 Tile Group Entry";
> >> case V4L2_CID_STATELESS_AV1_FRAME: return "AV1 Frame Parameters";
> >> case V4L2_CID_STATELESS_AV1_FILM_GRAIN: return "AV1 Film Grain";
> >> + case V4L2_CID_STATELESS_VP8_ENCODE_PARAMS: return "VP8 Encode Parameters";
> >> + case V4L2_CID_STATELESS_VP8_ENCODE_QP: return "VP8 Encode QP";
> >>
> >> /* Colorimetry controls */
> >> /* Keep the order of the 'case's the same as in v4l2-controls.h! */
> >> @@ -1592,6 +1594,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> >> case V4L2_CID_STATELESS_AV1_FILM_GRAIN:
> >> *type = V4L2_CTRL_TYPE_AV1_FILM_GRAIN;
> >> break;
> >> + case V4L2_CID_STATELESS_VP8_ENCODE_PARAMS:
> >> + *type = V4L2_CTRL_TYPE_VP8_ENCODE_PARAMS;
> >> + break;
> >> case V4L2_CID_UNIT_CELL_SIZE:
> >> *type = V4L2_CTRL_TYPE_AREA;
> >> *flags |= V4L2_CTRL_FLAG_READ_ONLY;
> >> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> >> index 59679a42b3e7..a165719e1139 100644
> >> --- a/include/media/v4l2-ctrls.h
> >> +++ b/include/media/v4l2-ctrls.h
> >> @@ -56,6 +56,7 @@ struct video_device;
> >> * @p_av1_tile_group_entry: Pointer to an AV1 tile group entry structure.
> >> * @p_av1_frame: Pointer to an AV1 frame structure.
> >> * @p_av1_film_grain: Pointer to an AV1 film grain structure.
> >> + * @p_vp8_encode_params: Pointer to a VP8 encode parameter structure.
> >> * @p: Pointer to a compound value.
> >> * @p_const: Pointer to a constant compound value.
> >> */
> >> @@ -89,6 +90,7 @@ union v4l2_ctrl_ptr {
> >> struct v4l2_ctrl_av1_tile_group_entry *p_av1_tile_group_entry;
> >> struct v4l2_ctrl_av1_frame *p_av1_frame;
> >> struct v4l2_ctrl_av1_film_grain *p_av1_film_grain;
> >> + struct v4l2_ctrl_vp8_encode_params *p_vp8_encode_params;
> >> void *p;
> >> const void *p_const;
> >> };
> >> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> >> index c3604a0a3e30..fdec5764e09c 100644
> >> --- a/include/uapi/linux/v4l2-controls.h
> >> +++ b/include/uapi/linux/v4l2-controls.h
> >> @@ -3479,6 +3479,97 @@ struct v4l2_ctrl_av1_film_grain {
> >> __u8 reserved[4];
> >> };
> >>
> >> +#define V4L2_CID_STATELESS_VP8_ENCODE_PARAMS (V4L2_CID_CODEC_STATELESS_BASE + 601)
> >> +
> >> +#define V4L2_VP8_FRAME_FLAG_SHOWFRAME 0x1
> >> +#define V4L2_VP8_FRAME_FLAG_GOLDEN_REFRESH 0x2
> >> +#define V4L2_VP8_FRAME_FLAG_ALTREF_REFRESH 0x4
> >> +#define V4L2_VP8_FRAME_FLAG_SEGMENT_ENABLED 0x8
> >> +#define V4L2_VP8_FRAME_FLAG_LOOP_FILTER_ADJ_ENABLED 0x10
> >> +#define V4L2_VP8_FRAME_FLAG_REFRESH_ENTROPY_PROBS 0x20
> >> +
> >> +#define V4L2_VP8_FRAME_TYPE_KEYFRAME 0
> >> +#define V4L2_VP8_FRAME_TYPE_INTER 1
> >> +
> >> +#define V4L2_VP8_FRAME_COLOR_SPACE_YUV 0
> >> +#define V4L2_VP8_FRAME_COLOR_SPACE_RESERVED 1
> >> +
> >> +#define V4L2_VP8_FRAME_CLAMPING_REQUIRED 0
> >> +#define V4L2_VP8_FRAME_CLAMPING_NO 1
> >> +
> >> +#define V4L2_VP8_FRAME_FILTER_TYPE_NORMAL 0
> >> +#define V4L2_VP8_FRAME_FILTER_TYPE_SIMPLE 1
> >> +
> >> +#define V4L2_VP8_FRAME_NBR_DCT_PARTITIONS_1 0
> >> +#define V4L2_VP8_FRAME_NBR_DCT_PARTITIONS_2 1
> >> +#define V4L2_VP8_FRAME_NBR_DCT_PARTITIONS_4 2
> >> +#define V4L2_VP8_FRAME_NBR_DCT_PARTITIONS_8 3
> >> +
> >> +#define V4L2_VP8_FRAME_GOLDEN_KEEP 0
> >> +#define V4L2_VP8_FRAME_GOLDEN_LASTFRAME 1
> >> +#define V4L2_VP8_FRAME_GOLDEN_ALTREF 2
> >> +
> >> +#define V4L2_VP8_FRAME_ALTREF_KEEP 0
> >> +#define V4L2_VP8_FRAME_ALTREF_LASTFRAME 1
> >> +#define V4L2_VP8_FRAME_ALTREF_GOLDEN 2
> >> +
> >> +#define V4L2_VP8_FRAME_REF_LAST 0
> >> +#define V4L2_VP8_FRAME_REF_GOLDEN 1
> >> +#define V4L2_VP8_FRAME_REF_ALT 2
> >> +
> >> +/**
> >> + * struct v4l2_ctrl_vp8_encode_params - VP8 encode parameters
> >> + * @flags: combination of V4L2_VP8_FRAME_FLAG_{} flags.
> >> + * @frame_type: specifies the frame type (key or inter).
> >> + * Set to one of V4L2_VP8_FRAME_TYPE_{}.
> >> + * @color_space: defines the YUV color space of the sequence.
> >> + * V4L2_VP8_FRAME_TYPE_INTER frames shall set this field to zero.
> >> + * Set to one of V4L2_VP8_FRAME_COLOR_SPACE_{}.
> >> + * @clamping_type: defines pixel value clamping type.
> >> + * V4L2_VP8_FRAME_TYPE_INTER frames shall set this field to zero.
> >> + * Set to one of V4L2_VP8_FRAME_CLAMPING_{}.
> >> + * @loop_filter_type: selects the type of loop filter applied.
> >> + * Set to one of V4L2_VP8_FRAME_FILTER_TYPE_{}.
> >> + * @loop_filter_level: sets the strength of the applied loop filter.
> >> + * Set to a value from the rage 0..63.
> >> + * @sharpness_level: sets the sharpness of the applied loop filter.
> >> + * Set to a value from the range 0..7.
> >> + * @log2_nbr_of_dct_partitions: determines the number of separate partitions
> >> + * containing the DCT coefficients of macroblocks.
> >> + * Set to one of V4L2_VP8_FRAME_NBR_DCT_PARTITIONS_{}.
> >> + * @prob_intra: indicates the probability of an intra macroblock.
> >> + * Set to a value from the range 0..255.
> >> + * @prob_last: indicates the probability that the last reference frame is used for inter-prediction.
> >> + * Set to a value from the range 0..255.
> >> + * @prob_gf: indicates the probability that the golden reference frame is used for inter-prediction.
> >> + * Set to a value from the range 0..255.
> >> + * @copy_buffer_to_golden: specifies the golden frame refresh strategy.
> >> + * Set to one of V4L2_VP8_FRAME_FLAG_GOLDEN_{}.
> >> + * @copy_buffer_to_alternate: specifies the atlref frame refresh strategy.
> >> + * Set to one of V4L2_VP8_FRAME_FLAG_ALTREF_{}.
> >> + * @reference_type: specifies what kind of reference to use for current inter frame.
> >> + * V4L2_VP8_FRAME_TYPE_KEYFRAME shall set this field to zero.
> >> + * Set to one of V4L2_VP8_FRAME_REF_{}.
> >> + */
> >> +struct v4l2_ctrl_vp8_encode_params {
> >> + __u32 flags;
> >> + __u8 frame_type;
> >> + __u8 color_space;
> >> + __u8 clamping_type;
> >> + __u8 loop_filter_type;
> >> + __u8 loop_filter_level;
> >> + __u8 sharpness_level;
> >> + __u8 log2_nbr_of_dct_partitions;
> >> + __u8 prob_intra;
> >> + __u8 prob_last;
> >> + __u8 prob_gf;
> >> + __u8 copy_buffer_to_golden;
> >> + __u8 copy_buffer_to_alternate;
> >> + __u8 reference_type;
> >> +};
> >> +
> >> +#define V4L2_CID_STATELESS_VP8_ENCODE_QP (V4L2_CID_CODEC_STATELESS_BASE + 602)
> >> +
> >> /* MPEG-compression definitions kept for backwards compatibility */
> >> #ifndef __KERNEL__
> >> #define V4L2_CTRL_CLASS_MPEG V4L2_CTRL_CLASS_CODEC
> >> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> >> index 78260e5d9985..b3cbdc60b82c 100644
> >> --- a/include/uapi/linux/videodev2.h
> >> +++ b/include/uapi/linux/videodev2.h
> >> @@ -1836,6 +1836,7 @@ struct v4l2_ext_control {
> >> struct v4l2_ctrl_av1_tile_group_entry __user *p_av1_tile_group_entry;
> >> struct v4l2_ctrl_av1_frame __user *p_av1_frame;
> >> struct v4l2_ctrl_av1_film_grain __user *p_av1_film_grain;
> >> + struct v4l2_ctrl_vp8_encode_params __user *p_vp8_encode_params;
> >> void __user *ptr;
> >> };
> >> } __attribute__ ((packed));
> >> @@ -1914,6 +1915,8 @@ enum v4l2_ctrl_type {
> >> V4L2_CTRL_TYPE_AV1_TILE_GROUP_ENTRY = 0x281,
> >> V4L2_CTRL_TYPE_AV1_FRAME = 0x282,
> >> V4L2_CTRL_TYPE_AV1_FILM_GRAIN = 0x283,
> >> +
> >> + V4L2_CTRL_TYPE_VP8_ENCODE_PARAMS = 0x0290,
> >> };
> >>
> >> /* Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
> >> --
> >> 2.25.1
> >>
>
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