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From:   Jernej =?utf-8?B?xaBrcmFiZWM=?= <jernej.skrabec@gmail.com>
To:     linux-sunxi@googlegroups.com, paul.kocialkowski@bootlin.com
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        devel@driverdev.osuosl.org, linux-arm-kernel@lists.infradead.org,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Randy Li <ayaka@soulik.info>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Ezequiel Garcia <ezequiel@collabora.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Alexandre Courbot <acourbot@chromium.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [linux-sunxi] [PATCH v2 1/2] media: v4l: Add definitions for the HEVC slice format and controls
Date:   Wed, 05 Dec 2018 21:59:38 +0100
Message-ID: <5515174.7lFZcYkk85@jernej-laptop>
In-Reply-To: <20181123130209.11696-2-paul.kocialkowski@bootlin.com>
References: <20181123130209.11696-1-paul.kocialkowski@bootlin.com> <20181123130209.11696-2-paul.kocialkowski@bootlin.com>
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Hi!

Dne petek, 23. november 2018 ob 14:02:08 CET je Paul Kocialkowski napisal(a):
> This introduces the required definitions for HEVC decoding support with
> stateless VPUs. The controls associated to the HEVC slice format provide
> the required meta-data for decoding slices extracted from the bitstream.
> 
> This interface comes with the following limitations:
> * No custom quantization matrices (scaling lists);
> * Support for a single temporal layer only;
> * No slice entry point offsets support;
> * No conformance window support;
> * No VUI parameters support;
> * No support for SPS extensions: range, multilayer, 3d, scc, 4 bits;
> * No support for PPS extensions: range, multilayer, 3d, scc, 4 bits.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> ---

<snip>

> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c
> b/drivers/media/v4l2-core/v4l2-ctrls.c index e96c453208e8..9af17815ecc3
> 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -913,6 +913,9 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD:	return "HEVC Size of
> Length Field"; case V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES:	return
> "Reference Frames for a P-Frame"; case
> V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR:		return "Prepend SPS and PPS 
to
> IDR"; +	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";
> 
>  	/* CAMERA controls */
>  	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
> @@ -1320,6 +1323,15 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum
> v4l2_ctrl_type *type, case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:
>  		*type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
>  		break;
> +	case V4L2_CID_MPEG_VIDEO_HEVC_SPS:
> +		*type = V4L2_CTRL_TYPE_HEVC_SPS;
> +		break;
> +	case V4L2_CID_MPEG_VIDEO_HEVC_PPS:
> +		*type = V4L2_CTRL_TYPE_HEVC_PPS;
> +		break;
> +	case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
> +		*type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
> +		break;
>  	default:
>  		*type = V4L2_CTRL_TYPE_INTEGER;
>  		break;
> @@ -1692,6 +1704,11 @@ static int std_validate(const struct v4l2_ctrl *ctrl,
> u32 idx, case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
>  		return 0;
> 
> +	case V4L2_CTRL_TYPE_HEVC_SPS:
> +	case V4L2_CTRL_TYPE_HEVC_PPS:
> +	case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
> +		return 0;
> +
>  	default:
>  		return -EINVAL;
>  	}
> @@ -2287,6 +2304,15 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
> v4l2_ctrl_handler *hdl, case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
>  		elem_size = sizeof(struct v4l2_ctrl_h264_decode_param);
>  		break;
> +	case V4L2_CTRL_TYPE_HEVC_SPS:
> +		elem_size = sizeof(struct v4l2_ctrl_hevc_sps);
> +		break;
> +	case V4L2_CTRL_TYPE_HEVC_PPS:
> +		elem_size = sizeof(struct v4l2_ctrl_hevc_pps);
> +		break;
> +	case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
> +		elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
> +		break;
>  	default:
>  		if (type < V4L2_CTRL_COMPOUND_TYPES)
>  			elem_size = sizeof(s32);
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c
> b/drivers/media/v4l2-core/v4l2-ioctl.c index aa63f1794272..7bec91c6effe
> 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1321,6 +1321,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
>  		case V4L2_PIX_FMT_VP9:		descr = "VP9"; break;
>  		case V4L2_PIX_FMT_HEVC:		descr = "HEVC"; break; /* aka H.265 */
> +		case V4L2_PIX_FMT_HEVC_SLICE:	descr = "HEVC Parsed Slice Data"; break;
>  		case V4L2_PIX_FMT_FWHT:		descr = "FWHT"; break; /* used in vicodec */
>  		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
>  		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> index b4ca95710d2d..11664c5c3706 100644
> --- a/include/media/v4l2-ctrls.h
> +++ b/include/media/v4l2-ctrls.h
> @@ -48,6 +48,9 @@ struct poll_table_struct;
>   * @p_h264_scal_mtrx:		Pointer to a struct 
v4l2_ctrl_h264_scaling_matrix.
>   * @p_h264_slice_param:		Pointer to a struct v4l2_ctrl_h264_slice_param.
>   * @p_h264_decode_param:	Pointer to a struct v4l2_ctrl_h264_decode_param.
> + * @p_hevc_sps:			Pointer to an HEVC sequence parameter set structure.
> + * @p_hevc_pps:			Pointer to an HEVC picture parameter set structure.
> + * @p_hevc_slice_params		Pointer to an HEVC slice parameters structure.
>   * @p:				Pointer to a compound value.
>   */
>  union v4l2_ctrl_ptr {
> @@ -64,6 +67,9 @@ union v4l2_ctrl_ptr {
>  	struct v4l2_ctrl_h264_scaling_matrix *p_h264_scal_mtrx;
>  	struct v4l2_ctrl_h264_slice_param *p_h264_slice_param;
>  	struct v4l2_ctrl_h264_decode_param *p_h264_decode_param;
> +	struct v4l2_ctrl_hevc_sps *p_hevc_sps;
> +	struct v4l2_ctrl_hevc_pps *p_hevc_pps;
> +	struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
>  	void *p;
>  };
> 
> diff --git a/include/uapi/linux/v4l2-controls.h
> b/include/uapi/linux/v4l2-controls.h index 628c0cdb51d9..5bbf63b2dad1
> 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -709,6 +709,9 @@ enum v4l2_cid_mpeg_video_hevc_size_of_length_field {
>  #define V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR	(V4L2_CID_MPEG_BASE +
> 642) #define V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES	(V4L2_CID_MPEG_BASE
> + 643) #define
> V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR	(V4L2_CID_MPEG_BASE + 644)
> +#define V4L2_CID_MPEG_VIDEO_HEVC_SPS			(V4L2_CID_MPEG_BASE + 645) 
+#define
> V4L2_CID_MPEG_VIDEO_HEVC_PPS			(V4L2_CID_MPEG_BASE + 646) +#define
> V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS		(V4L2_CID_MPEG_BASE + 647)
> 
>  /*  MPEG-class control IDs specific to the CX2341x driver as defined by
> V4L2 */ #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG |
> 0x1000) @@ -1324,4 +1327,156 @@ struct v4l2_ctrl_h264_decode_param {
>  	struct v4l2_h264_dpb_entry dpb[16];
>  };
> 
> +#define V4L2_HEVC_SLICE_TYPE_B	0
> +#define V4L2_HEVC_SLICE_TYPE_P	1
> +#define V4L2_HEVC_SLICE_TYPE_I	2
> +
> +struct v4l2_ctrl_hevc_sps {
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Sequence parameter set */
> +	__u8	chroma_format_idc;
> +	__u8	separate_colour_plane_flag;
> +	__u16	pic_width_in_luma_samples;
> +	__u16	pic_height_in_luma_samples;
> +	__u8	bit_depth_luma_minus8;
> +	__u8	bit_depth_chroma_minus8;
> +	__u8	log2_max_pic_order_cnt_lsb_minus4;
> +	__u8	sps_max_dec_pic_buffering_minus1;
> +	__u8	sps_max_num_reorder_pics;
> +	__u8	sps_max_latency_increase_plus1;
> +	__u8	log2_min_luma_coding_block_size_minus3;
> +	__u8	log2_diff_max_min_luma_coding_block_size;
> +	__u8	log2_min_luma_transform_block_size_minus2;
> +	__u8	log2_diff_max_min_luma_transform_block_size;
> +	__u8	max_transform_hierarchy_depth_inter;
> +	__u8	max_transform_hierarchy_depth_intra;
> +	__u8	scaling_list_enabled_flag;
> +	__u8	amp_enabled_flag;
> +	__u8	sample_adaptive_offset_enabled_flag;
> +	__u8	pcm_enabled_flag;
> +	__u8	pcm_sample_bit_depth_luma_minus1;
> +	__u8	pcm_sample_bit_depth_chroma_minus1;
> +	__u8	log2_min_pcm_luma_coding_block_size_minus3;
> +	__u8	log2_diff_max_min_pcm_luma_coding_block_size;
> +	__u8	pcm_loop_filter_disabled_flag;
> +	__u8	num_short_term_ref_pic_sets;
> +	__u8	long_term_ref_pics_present_flag;
> +	__u8	num_long_term_ref_pics_sps;
> +	__u8	sps_temporal_mvp_enabled_flag;
> +	__u8	strong_intra_smoothing_enabled_flag;
> +};
> +
> +struct v4l2_ctrl_hevc_pps {
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture parameter set */
> +	__u8	dependent_slice_segment_flag;
> +	__u8	output_flag_present_flag;
> +	__u8	num_extra_slice_header_bits;
> +	__u8	sign_data_hiding_enabled_flag;
> +	__u8	cabac_init_present_flag;
> +	__s8	init_qp_minus26;
> +	__u8	constrained_intra_pred_flag;
> +	__u8	transform_skip_enabled_flag;
> +	__u8	cu_qp_delta_enabled_flag;
> +	__u8	diff_cu_qp_delta_depth;
> +	__s8	pps_cb_qp_offset;
> +	__s8	pps_cr_qp_offset;
> +	__u8	pps_slice_chroma_qp_offsets_present_flag;
> +	__u8	weighted_pred_flag;
> +	__u8	weighted_bipred_flag;
> +	__u8	transquant_bypass_enabled_flag;
> +	__u8	tiles_enabled_flag;
> +	__u8	entropy_coding_sync_enabled_flag;
> +	__u8	num_tile_columns_minus1;
> +	__u8	num_tile_rows_minus1;
> +	__u8	column_width_minus1[20];
> +	__u8	row_height_minus1[22];
> +	__u8	loop_filter_across_tiles_enabled_flag;
> +	__u8	pps_loop_filter_across_slices_enabled_flag;
> +	__u8	deblocking_filter_override_enabled_flag;
> +	__u8	pps_disable_deblocking_filter_flag;
> +	__s8	pps_beta_offset_div2;
> +	__s8	pps_tc_offset_div2;
> +	__u8	lists_modification_present_flag;
> +	__u8	log2_parallel_merge_level_minus2;
> +	__u8	slice_segment_header_extension_present_flag;
> +};

Although scaling lists are not supported yet, I still think you should include 
"scaling_list_data_present_flag" here for the sake of completeness and you 
already included "scaling_list_enable_flag" in SPS.

I didn't do any thorough review though, just noticed this bit.

Best regards,
Jernej

> +
> +#define V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE	0x01
> +#define V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER	0x02
> +#define V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR		0x03
> +
> +#define V4L2_HEVC_DPB_ENTRIES_NUM_MAX		16
> +
> +struct v4l2_hevc_dpb_entry {
> +	__u32	buffer_tag;
> +	__u8	rps;
> +	__u8	field_pic;
> +	__u16	pic_order_cnt[2];
> +};
> +
> +struct v4l2_hevc_pred_weight_table {
> +	__u8	luma_log2_weight_denom;
> +	__s8	delta_chroma_log2_weight_denom;
> +
> +	__s8	delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__s8	luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__s8	delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2];
> +	__s8	chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2];
> +
> +	__s8	delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__s8	luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__s8	delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2];
> +	__s8	chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2];
> +};
> +
> +struct v4l2_ctrl_hevc_slice_params {
> +	__u32	bit_size;
> +	__u32	data_bit_offset;
> +
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
> +	__u8	nal_unit_type;
> +	__u8	nuh_temporal_id_plus1;
> +
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
> +	__u8	slice_type;
> +	__u8	colour_plane_id;
> +	__u16	slice_pic_order_cnt;
> +	__u8	slice_sao_luma_flag;
> +	__u8	slice_sao_chroma_flag;
> +	__u8	slice_temporal_mvp_enabled_flag;
> +	__u8	num_ref_idx_l0_active_minus1;
> +	__u8	num_ref_idx_l1_active_minus1;
> +	__u8	mvd_l1_zero_flag;
> +	__u8	cabac_init_flag;
> +	__u8	collocated_from_l0_flag;
> +	__u8	collocated_ref_idx;
> +	__u8	five_minus_max_num_merge_cand;
> +	__u8	use_integer_mv_flag;
> +	__s8	slice_qp_delta;
> +	__s8	slice_cb_qp_offset;
> +	__s8	slice_cr_qp_offset;
> +	__s8	slice_act_y_qp_offset;
> +	__s8	slice_act_cb_qp_offset;
> +	__s8	slice_act_cr_qp_offset;
> +	__u8	slice_deblocking_filter_disabled_flag;
> +	__s8	slice_beta_offset_div2;
> +	__s8	slice_tc_offset_div2;
> +	__u8	slice_loop_filter_across_slices_enabled_flag;
> +
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture timing SEI message */
> +	__u8	pic_struct;
> +
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
> +	struct v4l2_hevc_dpb_entry dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__u8	num_active_dpb_entries;
> +	__u8	ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +	__u8	ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> +
> +	__u8	num_rps_poc_st_curr_before;
> +	__u8	num_rps_poc_st_curr_after;
> +	__u8	num_rps_poc_lt_curr;
> +
> +	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Weighted prediction parameter */
> +	struct v4l2_hevc_pred_weight_table pred_weight_table;
> +};
> +
>  #endif