Re: [linux-sunxi] [PATCH v2 1/2] media: v4l: Add definitions for the HEVC slice format and controls

From: Jernej Åkrabec
Date: Wed Dec 05 2018 - 15:59:47 EST

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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@xxxxxxxxxxx>
> ---

<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

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