Re: [PATCH v5 05/10] media: uapi: Add VP9 stateless decoder controls

[Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>]

Hi Andrzej, 

On Wed, Sep 22, 2021 at 12:11:41PM +0200, Andrzej Pietrasiewicz wrote:
> Add the VP9 stateless decoder controls plus the documentation that goes
> with it.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
> Co-developed-by: Ezequiel Garcia <ezequiel@collabora.com>
> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
> Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
> Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
> ---
[snip]
> +
> +#define V4L2_VP9_FRAME_FLAG_KEY_FRAME			0x001
> +#define V4L2_VP9_FRAME_FLAG_SHOW_FRAME			0x002
> +#define V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT		0x004
> +#define V4L2_VP9_FRAME_FLAG_INTRA_ONLY			0x008
> +#define V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV		0x010
> +#define V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX		0x020
> +#define V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE		0x040
> +#define V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING		0x080
> +#define V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING		0x100
> +#define V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING	0x200
> +
> +#define V4L2_VP9_SIGN_BIAS_LAST				0x1
> +#define V4L2_VP9_SIGN_BIAS_GOLDEN			0x2
> +#define V4L2_VP9_SIGN_BIAS_ALT				0x4
> +
> +#define V4L2_VP9_RESET_FRAME_CTX_NONE			0
> +#define V4L2_VP9_RESET_FRAME_CTX_SPEC			1
> +#define V4L2_VP9_RESET_FRAME_CTX_ALL			2
> +
> +#define V4L2_VP9_INTERP_FILTER_EIGHTTAP			0
> +#define V4L2_VP9_INTERP_FILTER_EIGHTTAP_SMOOTH		1
> +#define V4L2_VP9_INTERP_FILTER_EIGHTTAP_SHARP		2
> +#define V4L2_VP9_INTERP_FILTER_BILINEAR			3
> +#define V4L2_VP9_INTERP_FILTER_SWITCHABLE		4
> +
> +#define V4L2_VP9_REFERENCE_MODE_SINGLE_REFERENCE	0
> +#define V4L2_VP9_REFERENCE_MODE_COMPOUND_REFERENCE	1
> +#define V4L2_VP9_REFERENCE_MODE_SELECT			2
> +
> +#define V4L2_VP9_PROFILE_MAX				3
> +
> +#define V4L2_CID_STATELESS_VP9_FRAME	(V4L2_CID_CODEC_STATELESS_BASE + 300)
> +/**
> + * struct v4l2_ctrl_vp9_frame - VP9 frame decoding control
> + *
> + * @lf: loop filter parameters. See &v4l2_vp9_loop_filter for more details

Seems these documentation is missing an ending period for many fields.

> + * @quant: quantization parameters. See &v4l2_vp9_quantization for more details
> + * @seg: segmentation parameters. See &v4l2_vp9_segmentation for more details
> + * @flags: combination of V4L2_VP9_FRAME_FLAG_* flags
> + * @compressed_header_size: compressed header size in bytes
> + * @uncompressed_header_size: uncompressed header size in bytes
> + * @frame_width_minus_1: add 1 to it and you'll get the frame width expressed in pixels
> + * @frame_height_minus_1: add 1 to it and you'll get the frame height expressed in pixels
> + * @render_width_minus_1: add 1 to it and you'll get the expected render width expressed in
> + *	pixels. This is not used during the decoding process but might be used by HW scalers
> + *	to prepare a frame that's ready for scanout
> + * @render_height_minus_1: add 1 to it and you'll get the expected render height expressed in
> + *	pixels. This is not used during the decoding process but might be used by HW scalers
> + *	to prepare a frame that's ready for scanout
> + * @last_frame_ts: "last" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @golden_frame_ts: "golden" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @alt_frame_ts: "alt" reference buffer timestamp.
> + * The timestamp refers to the timestamp field in struct v4l2_buffer.
> + * Use v4l2_timeval_to_ns() to convert the struct timeval to a __u64.
> + * @ref_frame_sign_bias: a bitfield specifying whether the sign bias is set for a given
> + *	reference frame. Either of V4L2_VP9_SIGN_BIAS_*.
> + * @reset_frame_context: specifies whether the frame context should be reset to default values.
> + *	Either of V4L2_VP9_RESET_FRAME_CTX_*.
> + * @frame_context_idx: frame context that should be used/updated
> + * @profile: VP9 profile. Can be 0, 1, 2 or 3
> + * @bit_depth: bits per components. Can be 8, 10 or 12. Note that not all profiles support
> + *	10 and/or 12 bits depths
> + * @interpolation_filter: specifies the filter selection used for performing inter prediction.
> + *	Either of V4L2_VP9_INTERP_FILTER_*
> + * @tile_cols_log2: specifies the base 2 logarithm of the width of each tile (where the width
> + *	is measured in units of 8x8 blocks). Shall be less than or equal to 6
> + * @tile_rows_log2: specifies the base 2 logarithm of the height of each tile (where the height
> + *	is measured in units of 8x8 blocks)
> + * @reference_mode: specifies the type of inter prediction to be used. See

See what? :-)

> + *	Either of V4L2_VP9_REFERENCE_MODE_*

Other controls use V4L2_VP9_REFERENCE_MODE_{}, {} instead of *.
The same applies to all the documentation.

> + * @reserved: padding field. Should be zeroed by applications.
> + */
> +struct v4l2_ctrl_vp9_frame {
> +	struct v4l2_vp9_loop_filter lf;
> +	struct v4l2_vp9_quantization quant;
> +	struct v4l2_vp9_segmentation seg;
> +	__u32 flags;
> +	__u16 compressed_header_size;
> +	__u16 uncompressed_header_size;
> +	__u16 frame_width_minus_1;
> +	__u16 frame_height_minus_1;
> +	__u16 render_width_minus_1;
> +	__u16 render_height_minus_1;
> +	__u64 last_frame_ts;
> +	__u64 golden_frame_ts;
> +	__u64 alt_frame_ts;
> +	__u8 ref_frame_sign_bias;
> +	__u8 reset_frame_context;
> +	__u8 frame_context_idx;
> +	__u8 profile;
> +	__u8 bit_depth;
> +	__u8 interpolation_filter;
> +	__u8 tile_cols_log2;
> +	__u8 tile_rows_log2;
> +	__u8 reference_mode;
> +	__u8 reserved[7];
> +};
> +

Also, have you checked html and pdf docs and make sure
it looks as you expect?

Thanks,
Ezequiel

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