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linux/drivers/media/platform/allegro-dvt/nal-hevc.h
Ricardo Ribalda 669d51f8f4 media: allegro: nal-hevc: Replace array[1] with array[N] 
Structures that have a single element array as the last field can be
mistaken as a "flex array".

We could replace all the single element arrays in the structure with
single element fields, but this driver prefers to follow the ITU-T H.265
specification, which defines it as an array.

If we introduce a new define N_HRD_PARAMS, we make clear our
intentions.

This fixes this cocci warning:
drivers/media/platform/allegro-dvt/nal-hevc.h:102:14-22: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: fix typo in subject and commit log]
2024-05-31 13:51:16 +02:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Pengutronix, Michael Tretter <kernel@pengutronix.de>
*
* Convert NAL units between raw byte sequence payloads (RBSP) and C structs.
*/
#ifndef __NAL_HEVC_H__
#define __NAL_HEVC_H__
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/v4l2-controls.h>
#include <linux/videodev2.h>
struct nal_hevc_profile_tier_level {
unsigned int general_profile_space;
unsigned int general_tier_flag;
unsigned int general_profile_idc;
unsigned int general_profile_compatibility_flag[32];
unsigned int general_progressive_source_flag;
unsigned int general_interlaced_source_flag;
unsigned int general_non_packed_constraint_flag;
unsigned int general_frame_only_constraint_flag;
union {
struct {
unsigned int general_max_12bit_constraint_flag;
unsigned int general_max_10bit_constraint_flag;
unsigned int general_max_8bit_constraint_flag;
unsigned int general_max_422chroma_constraint_flag;
unsigned int general_max_420chroma_constraint_flag;
unsigned int general_max_monochrome_constraint_flag;
unsigned int general_intra_constraint_flag;
unsigned int general_one_picture_only_constraint_flag;
unsigned int general_lower_bit_rate_constraint_flag;
union {
struct {
unsigned int general_max_14bit_constraint_flag;
unsigned int general_reserved_zero_33bits;
};
unsigned int general_reserved_zero_34bits;
};
};
struct {
unsigned int general_reserved_zero_7bits;
/* unsigned int general_one_picture_only_constraint_flag; */
unsigned int general_reserved_zero_35bits;
};
unsigned int general_reserved_zero_43bits;
};
union {
unsigned int general_inbld_flag;
unsigned int general_reserved_zero_bit;
};
unsigned int general_level_idc;
};
/*
* struct nal_hevc_vps - Video parameter set
*
* C struct representation of the video parameter set NAL unit as defined by
* Rec. ITU-T H.265 (02/2018) 7.3.2.1 Video parameter set RBSP syntax
*/
struct nal_hevc_vps {
unsigned int video_parameter_set_id;
unsigned int base_layer_internal_flag;
unsigned int base_layer_available_flag;
unsigned int max_layers_minus1;
unsigned int max_sub_layers_minus1;
unsigned int temporal_id_nesting_flag;
struct nal_hevc_profile_tier_level profile_tier_level;
unsigned int sub_layer_ordering_info_present_flag;
struct {
unsigned int max_dec_pic_buffering_minus1[7];
unsigned int max_num_reorder_pics[7];
unsigned int max_latency_increase_plus1[7];
};
unsigned int max_layer_id;
unsigned int num_layer_sets_minus1;
unsigned int layer_id_included_flag[1024][64];
unsigned int timing_info_present_flag;
struct {
unsigned int num_units_in_tick;
unsigned int time_scale;
unsigned int poc_proportional_to_timing_flag;
unsigned int num_ticks_poc_diff_one_minus1;
unsigned int num_hrd_parameters;
struct {
unsigned int hrd_layer_set_idx[0];
unsigned int cprms_present_flag[0];
};
/* hrd_parameters( cprms_present_flag[ i ], max_sub_layers_minus1 ) */
};
unsigned int extension_flag;
unsigned int extension_data_flag;
};
#define N_HRD_PARAMS 1
struct nal_hevc_sub_layer_hrd_parameters {
unsigned int bit_rate_value_minus1[N_HRD_PARAMS];
unsigned int cpb_size_value_minus1[N_HRD_PARAMS];
unsigned int cbr_flag[N_HRD_PARAMS];
};
struct nal_hevc_hrd_parameters {
unsigned int nal_hrd_parameters_present_flag;
unsigned int vcl_hrd_parameters_present_flag;
struct {
unsigned int sub_pic_hrd_params_present_flag;
struct {
unsigned int tick_divisor_minus2;
unsigned int du_cpb_removal_delay_increment_length_minus1;
unsigned int sub_pic_cpb_params_in_pic_timing_sei_flag;
unsigned int dpb_output_delay_du_length_minus1;
};
unsigned int bit_rate_scale;
unsigned int cpb_size_scale;
unsigned int cpb_size_du_scale;
unsigned int initial_cpb_removal_delay_length_minus1;
unsigned int au_cpb_removal_delay_length_minus1;
unsigned int dpb_output_delay_length_minus1;
};
struct {
unsigned int fixed_pic_rate_general_flag[1];
unsigned int fixed_pic_rate_within_cvs_flag[1];
unsigned int elemental_duration_in_tc_minus1[1];
unsigned int low_delay_hrd_flag[1];
unsigned int cpb_cnt_minus1[1];
struct nal_hevc_sub_layer_hrd_parameters nal_hrd[1];
struct nal_hevc_sub_layer_hrd_parameters vcl_hrd[1];
};
};
/*
* struct nal_hevc_vui_parameters - VUI parameters
*
* C struct representation of the VUI parameters as defined by Rec. ITU-T
* H.265 (02/2018) E.2.1 VUI parameters syntax.
*/
struct nal_hevc_vui_parameters {
unsigned int aspect_ratio_info_present_flag;
struct {
unsigned int aspect_ratio_idc;
unsigned int sar_width;
unsigned int sar_height;
};
unsigned int overscan_info_present_flag;
unsigned int overscan_appropriate_flag;
unsigned int video_signal_type_present_flag;
struct {
unsigned int video_format;
unsigned int video_full_range_flag;
unsigned int colour_description_present_flag;
struct {
unsigned int colour_primaries;
unsigned int transfer_characteristics;
unsigned int matrix_coeffs;
};
};
unsigned int chroma_loc_info_present_flag;
struct {
unsigned int chroma_sample_loc_type_top_field;
unsigned int chroma_sample_loc_type_bottom_field;
};
unsigned int neutral_chroma_indication_flag;
unsigned int field_seq_flag;
unsigned int frame_field_info_present_flag;
unsigned int default_display_window_flag;
struct {
unsigned int def_disp_win_left_offset;
unsigned int def_disp_win_right_offset;
unsigned int def_disp_win_top_offset;
unsigned int def_disp_win_bottom_offset;
};
unsigned int vui_timing_info_present_flag;
struct {
unsigned int vui_num_units_in_tick;
unsigned int vui_time_scale;
unsigned int vui_poc_proportional_to_timing_flag;
unsigned int vui_num_ticks_poc_diff_one_minus1;
unsigned int vui_hrd_parameters_present_flag;
struct nal_hevc_hrd_parameters nal_hrd_parameters;
};
unsigned int bitstream_restriction_flag;
struct {
unsigned int tiles_fixed_structure_flag;
unsigned int motion_vectors_over_pic_boundaries_flag;
unsigned int restricted_ref_pic_lists_flag;
unsigned int min_spatial_segmentation_idc;
unsigned int max_bytes_per_pic_denom;
unsigned int max_bits_per_min_cu_denom;
unsigned int log2_max_mv_length_horizontal;
unsigned int log2_max_mv_length_vertical;
};
};
/*
* struct nal_hevc_sps - Sequence parameter set
*
* C struct representation of the video parameter set NAL unit as defined by
* Rec. ITU-T H.265 (02/2018) 7.3.2.2 Sequence parameter set RBSP syntax
*/
struct nal_hevc_sps {
unsigned int video_parameter_set_id;
unsigned int max_sub_layers_minus1;
unsigned int temporal_id_nesting_flag;
struct nal_hevc_profile_tier_level profile_tier_level;
unsigned int seq_parameter_set_id;
unsigned int chroma_format_idc;
unsigned int separate_colour_plane_flag;
unsigned int pic_width_in_luma_samples;
unsigned int pic_height_in_luma_samples;
unsigned int conformance_window_flag;
struct {
unsigned int conf_win_left_offset;
unsigned int conf_win_right_offset;
unsigned int conf_win_top_offset;
unsigned int conf_win_bottom_offset;
};
unsigned int bit_depth_luma_minus8;
unsigned int bit_depth_chroma_minus8;
unsigned int log2_max_pic_order_cnt_lsb_minus4;
unsigned int sub_layer_ordering_info_present_flag;
struct {
unsigned int max_dec_pic_buffering_minus1[7];
unsigned int max_num_reorder_pics[7];
unsigned int max_latency_increase_plus1[7];
};
unsigned int log2_min_luma_coding_block_size_minus3;
unsigned int log2_diff_max_min_luma_coding_block_size;
unsigned int log2_min_luma_transform_block_size_minus2;
unsigned int log2_diff_max_min_luma_transform_block_size;
unsigned int max_transform_hierarchy_depth_inter;
unsigned int max_transform_hierarchy_depth_intra;
unsigned int scaling_list_enabled_flag;
unsigned int scaling_list_data_present_flag;
unsigned int amp_enabled_flag;
unsigned int sample_adaptive_offset_enabled_flag;
unsigned int pcm_enabled_flag;
struct {
unsigned int pcm_sample_bit_depth_luma_minus1;
unsigned int pcm_sample_bit_depth_chroma_minus1;
unsigned int log2_min_pcm_luma_coding_block_size_minus3;
unsigned int log2_diff_max_min_pcm_luma_coding_block_size;
unsigned int pcm_loop_filter_disabled_flag;
};
unsigned int num_short_term_ref_pic_sets;
unsigned int long_term_ref_pics_present_flag;
unsigned int sps_temporal_mvp_enabled_flag;
unsigned int strong_intra_smoothing_enabled_flag;
unsigned int vui_parameters_present_flag;
struct nal_hevc_vui_parameters vui;
unsigned int extension_present_flag;
struct {
unsigned int sps_range_extension_flag;
unsigned int sps_multilayer_extension_flag;
unsigned int sps_3d_extension_flag;
unsigned int sps_scc_extension_flag;
unsigned int sps_extension_4bits;
};
};
struct nal_hevc_pps {
unsigned int pps_pic_parameter_set_id;
unsigned int pps_seq_parameter_set_id;
unsigned int dependent_slice_segments_enabled_flag;
unsigned int output_flag_present_flag;
unsigned int num_extra_slice_header_bits;
unsigned int sign_data_hiding_enabled_flag;
unsigned int cabac_init_present_flag;
unsigned int num_ref_idx_l0_default_active_minus1;
unsigned int num_ref_idx_l1_default_active_minus1;
int init_qp_minus26;
unsigned int constrained_intra_pred_flag;
unsigned int transform_skip_enabled_flag;
unsigned int cu_qp_delta_enabled_flag;
unsigned int diff_cu_qp_delta_depth;
int pps_cb_qp_offset;
int pps_cr_qp_offset;
unsigned int pps_slice_chroma_qp_offsets_present_flag;
unsigned int weighted_pred_flag;
unsigned int weighted_bipred_flag;
unsigned int transquant_bypass_enabled_flag;
unsigned int tiles_enabled_flag;
unsigned int entropy_coding_sync_enabled_flag;
struct {
unsigned int num_tile_columns_minus1;
unsigned int num_tile_rows_minus1;
unsigned int uniform_spacing_flag;
struct {
unsigned int column_width_minus1[1];
unsigned int row_height_minus1[1];
};
unsigned int loop_filter_across_tiles_enabled_flag;
};
unsigned int pps_loop_filter_across_slices_enabled_flag;
unsigned int deblocking_filter_control_present_flag;
struct {
unsigned int deblocking_filter_override_enabled_flag;
unsigned int pps_deblocking_filter_disabled_flag;
struct {
int pps_beta_offset_div2;
int pps_tc_offset_div2;
};
};
unsigned int pps_scaling_list_data_present_flag;
unsigned int lists_modification_present_flag;
unsigned int log2_parallel_merge_level_minus2;
unsigned int slice_segment_header_extension_present_flag;
unsigned int pps_extension_present_flag;
struct {
unsigned int pps_range_extension_flag;
unsigned int pps_multilayer_extension_flag;
unsigned int pps_3d_extension_flag;
unsigned int pps_scc_extension_flag;
unsigned int pps_extension_4bits;
};
};
/**
* nal_hevc_profile() - Get profile_idc for v4l2 hevc profile
* @profile: the profile as &enum v4l2_mpeg_video_hevc_profile
*
* Convert the &enum v4l2_mpeg_video_hevc_profile to profile_idc as specified
* in Rec. ITU-T H.265 (02/2018) A.3.
*
* Return: the profile_idc for the passed level
*/
static inline int nal_hevc_profile(enum v4l2_mpeg_video_hevc_profile profile)
{
switch (profile) {
case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN:
return 1;
case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10:
return 2;
case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE:
return 3;
default:
return -EINVAL;
}
}
/**
* nal_hevc_tier() - Get tier_flag for v4l2 hevc tier
* @tier: the tier as &enum v4l2_mpeg_video_hevc_tier
*
* Convert the &enum v4l2_mpeg_video_hevc_tier to tier_flag as specified
* in Rec. ITU-T H.265 (02/2018) A.4.1.
*
* Return: the tier_flag for the passed tier
*/
static inline int nal_hevc_tier(enum v4l2_mpeg_video_hevc_tier tier)
{
switch (tier) {
case V4L2_MPEG_VIDEO_HEVC_TIER_MAIN:
return 0;
case V4L2_MPEG_VIDEO_HEVC_TIER_HIGH:
return 1;
default:
return -EINVAL;
}
}
/**
* nal_hevc_level() - Get level_idc for v4l2 hevc level
* @level: the level as &enum v4l2_mpeg_video_hevc_level
*
* Convert the &enum v4l2_mpeg_video_hevc_level to level_idc as specified in
* Rec. ITU-T H.265 (02/2018) A.4.1.
*
* Return: the level_idc for the passed level
*/
static inline int nal_hevc_level(enum v4l2_mpeg_video_hevc_level level)
{
/*
* T-Rec-H.265 p. 280: general_level_idc and sub_layer_level_idc[ i ]
* shall be set equal to a value of 30 times the level number
* specified in Table A.6.
*/
int factor = 30 / 10;
switch (level) {
case V4L2_MPEG_VIDEO_HEVC_LEVEL_1:
return factor * 10;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_2:
return factor * 20;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1:
return factor * 21;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_3:
return factor * 30;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1:
return factor * 31;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_4:
return factor * 40;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1:
return factor * 41;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_5:
return factor * 50;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1:
return factor * 51;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2:
return factor * 52;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_6:
return factor * 60;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1:
return factor * 61;
case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2:
return factor * 62;
default:
return -EINVAL;
}
}
static inline int nal_hevc_full_range(enum v4l2_quantization quantization)
{
switch (quantization) {
case V4L2_QUANTIZATION_FULL_RANGE:
return 1;
case V4L2_QUANTIZATION_LIM_RANGE:
return 0;
default:
break;
}
return 0;
}
static inline int nal_hevc_color_primaries(enum v4l2_colorspace colorspace)
{
switch (colorspace) {
case V4L2_COLORSPACE_SMPTE170M:
return 6;
case V4L2_COLORSPACE_SMPTE240M:
return 7;
case V4L2_COLORSPACE_REC709:
return 1;
case V4L2_COLORSPACE_470_SYSTEM_M:
return 4;
case V4L2_COLORSPACE_JPEG:
case V4L2_COLORSPACE_SRGB:
case V4L2_COLORSPACE_470_SYSTEM_BG:
return 5;
case V4L2_COLORSPACE_BT2020:
return 9;
case V4L2_COLORSPACE_DEFAULT:
case V4L2_COLORSPACE_OPRGB:
case V4L2_COLORSPACE_RAW:
case V4L2_COLORSPACE_DCI_P3:
default:
return 2;
}
}
static inline int nal_hevc_transfer_characteristics(enum v4l2_colorspace colorspace,
enum v4l2_xfer_func xfer_func)
{
if (xfer_func == V4L2_XFER_FUNC_DEFAULT)
xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(colorspace);
switch (xfer_func) {
case V4L2_XFER_FUNC_709:
return 6;
case V4L2_XFER_FUNC_SMPTE2084:
return 16;
case V4L2_XFER_FUNC_SRGB:
case V4L2_XFER_FUNC_OPRGB:
case V4L2_XFER_FUNC_NONE:
case V4L2_XFER_FUNC_DCI_P3:
case V4L2_XFER_FUNC_SMPTE240M:
default:
return 2;
}
}
static inline int nal_hevc_matrix_coeffs(enum v4l2_colorspace colorspace,
enum v4l2_ycbcr_encoding ycbcr_encoding)
{
if (ycbcr_encoding == V4L2_YCBCR_ENC_DEFAULT)
ycbcr_encoding = V4L2_MAP_YCBCR_ENC_DEFAULT(colorspace);
switch (ycbcr_encoding) {
case V4L2_YCBCR_ENC_601:
case V4L2_YCBCR_ENC_XV601:
return 5;
case V4L2_YCBCR_ENC_709:
case V4L2_YCBCR_ENC_XV709:
return 1;
case V4L2_YCBCR_ENC_BT2020:
return 9;
case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
return 10;
case V4L2_YCBCR_ENC_SMPTE240M:
default:
return 2;
}
}
ssize_t nal_hevc_write_vps(const struct device *dev,
void *dest, size_t n, struct nal_hevc_vps *vps);
ssize_t nal_hevc_read_vps(const struct device *dev,
struct nal_hevc_vps *vps, void *src, size_t n);
ssize_t nal_hevc_write_sps(const struct device *dev,
void *dest, size_t n, struct nal_hevc_sps *sps);
ssize_t nal_hevc_read_sps(const struct device *dev,
struct nal_hevc_sps *sps, void *src, size_t n);
ssize_t nal_hevc_write_pps(const struct device *dev,
void *dest, size_t n, struct nal_hevc_pps *pps);
ssize_t nal_hevc_read_pps(const struct device *dev,
struct nal_hevc_pps *pps, void *src, size_t n);
ssize_t nal_hevc_write_filler(const struct device *dev, void *dest, size_t n);
ssize_t nal_hevc_read_filler(const struct device *dev, void *src, size_t n);
#endif /* __NAL_HEVC_H__ */
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