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linux-next/include/media/hevc-ctrls.h
Paul Kocialkowski 256fa39208 media: v4l: Add definitions for HEVC stateless decoding 
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.

They are not exported to the public V4L2 API since reworking this API
will likely be needed for covering various use-cases and new hardware.

Multi-slice decoding is exposed as a valid decoding mode to match current
H.264 support but it is not yet implemented.

The 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>
[hverkuil-cisco@xs4all.nl: use 1ULL in flags defines in hevc-ctrls.h]
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-10-24 18:09:18 -03:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* These are the HEVC state controls for use with stateless HEVC
* codec drivers.
*
* It turns out that these structs are not stable yet and will undergo
* more changes. So keep them private until they are stable and ready to
* become part of the official public API.
*/
#ifndef _HEVC_CTRLS_H_
#define _HEVC_CTRLS_H_
#include <linux/videodev2.h>
/* The pixel format isn't stable at the moment and will likely be renamed. */
#define V4L2_PIX_FMT_HEVC_SLICE v4l2_fourcc('S', '2', '6', '5') /* HEVC parsed slices */
#define V4L2_CID_MPEG_VIDEO_HEVC_SPS (V4L2_CID_MPEG_BASE + 1008)
#define V4L2_CID_MPEG_VIDEO_HEVC_PPS (V4L2_CID_MPEG_BASE + 1009)
#define V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (V4L2_CID_MPEG_BASE + 1010)
#define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (V4L2_CID_MPEG_BASE + 1015)
#define V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (V4L2_CID_MPEG_BASE + 1016)
/* enum v4l2_ctrl_type type values */
#define V4L2_CTRL_TYPE_HEVC_SPS 0x0120
#define V4L2_CTRL_TYPE_HEVC_PPS 0x0121
#define V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS 0x0122
enum v4l2_mpeg_video_hevc_decode_mode {
V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED,
V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED,
};
enum v4l2_mpeg_video_hevc_start_code {
V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE,
V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B,
};
#define V4L2_HEVC_SLICE_TYPE_B 0
#define V4L2_HEVC_SLICE_TYPE_P 1
#define V4L2_HEVC_SLICE_TYPE_I 2
#define V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE (1ULL << 0)
#define V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED (1ULL << 1)
#define V4L2_HEVC_SPS_FLAG_AMP_ENABLED (1ULL << 2)
#define V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET (1ULL << 3)
#define V4L2_HEVC_SPS_FLAG_PCM_ENABLED (1ULL << 4)
#define V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED (1ULL << 5)
#define V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT (1ULL << 6)
#define V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED (1ULL << 7)
#define V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED (1ULL << 8)
/* The controls are not stable at the moment and will likely be reworked. */
struct v4l2_ctrl_hevc_sps {
/* ISO/IEC 23008-2, ITU-T Rec. H.265: Sequence parameter set */
__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 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 num_short_term_ref_pic_sets;
__u8 num_long_term_ref_pics_sps;
__u8 chroma_format_idc;
__u8 padding;
__u64 flags;
};
#define V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT (1ULL << 0)
#define V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT (1ULL << 1)
#define V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED (1ULL << 2)
#define V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT (1ULL << 3)
#define V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED (1ULL << 4)
#define V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED (1ULL << 5)
#define V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED (1ULL << 6)
#define V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT (1ULL << 7)
#define V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED (1ULL << 8)
#define V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED (1ULL << 9)
#define V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED (1ULL << 10)
#define V4L2_HEVC_PPS_FLAG_TILES_ENABLED (1ULL << 11)
#define V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED (1ULL << 12)
#define V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED (1ULL << 13)
#define V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED (1ULL << 14)
#define V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED (1ULL << 15)
#define V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER (1ULL << 16)
#define V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT (1ULL << 17)
#define V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT (1ULL << 18)
struct v4l2_ctrl_hevc_pps {
/* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture parameter set */
__u8 num_extra_slice_header_bits;
__s8 init_qp_minus26;
__u8 diff_cu_qp_delta_depth;
__s8 pps_cb_qp_offset;
__s8 pps_cr_qp_offset;
__u8 num_tile_columns_minus1;
__u8 num_tile_rows_minus1;
__u8 column_width_minus1[20];
__u8 row_height_minus1[22];
__s8 pps_beta_offset_div2;
__s8 pps_tc_offset_div2;
__u8 log2_parallel_merge_level_minus2;
__u8 padding[4];
__u64 flags;
};
#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 {
__u64 timestamp;
__u8 rps;
__u8 field_pic;
__u16 pic_order_cnt[2];
__u8 padding[2];
};
struct v4l2_hevc_pred_weight_table {
__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];
__u8 padding[6];
__u8 luma_log2_weight_denom;
__s8 delta_chroma_log2_weight_denom;
};
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA (1ULL << 0)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA (1ULL << 1)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED (1ULL << 2)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO (1ULL << 3)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT (1ULL << 4)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0 (1ULL << 5)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV (1ULL << 6)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED (1ULL << 7)
#define V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED (1ULL << 8)
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 num_ref_idx_l0_active_minus1;
__u8 num_ref_idx_l1_active_minus1;
__u8 collocated_ref_idx;
__u8 five_minus_max_num_merge_cand;
__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;
__s8 slice_beta_offset_div2;
__s8 slice_tc_offset_div2;
/* 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 */
__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;
__u8 padding;
/* 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];
/* ISO/IEC 23008-2, ITU-T Rec. H.265: Weighted prediction parameter */
struct v4l2_hevc_pred_weight_table pred_weight_table;
__u64 flags;
};
#endif
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