[RFC 1/6] media: uapi: Add VP8 stateless encoder controls

From: Hugues Fruchet
Date: Wed Oct 04 2023 - 06:38:00 EST

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From: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>

Add uAPI for stateless VP8 encoders.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxxxx>
---
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

Next message: Hugues Fruchet: "[RFC 3/6] media: hantro: add h1 vp8 encode support"
Previous message: Hugues Fruchet: "[RFC 0/6] VP8 H1 stateless encoding"
In reply to: Hugues Fruchet: "[RFC 4/6] media: hantro: add VP8 encode support for STM32MP25 VENC"
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