1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2019 Pengutronix, Michael Tretter <kernel@pengutronix.de> 4 * 5 * Convert NAL units between raw byte sequence payloads (RBSP) and C structs. 6 */ 7 8 #ifndef __NAL_H264_H__ 9 #define __NAL_H264_H__ 10 11 #include <linux/kernel.h> 12 #include <linux/types.h> 13 14 /* 15 * struct nal_h264_hrd_parameters - HRD parameters 16 * 17 * C struct representation of the sequence parameter set NAL unit as defined by 18 * Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax. 19 */ 20 struct nal_h264_hrd_parameters { 21 unsigned int cpb_cnt_minus1; 22 unsigned int bit_rate_scale; 23 unsigned int cpb_size_scale; 24 struct { 25 int bit_rate_value_minus1[16]; 26 int cpb_size_value_minus1[16]; 27 unsigned int cbr_flag[16]; 28 }; 29 unsigned int initial_cpb_removal_delay_length_minus1; 30 unsigned int cpb_removal_delay_length_minus1; 31 unsigned int dpb_output_delay_length_minus1; 32 unsigned int time_offset_length; 33 }; 34 35 /* 36 * struct nal_h264_vui_parameters - VUI parameters 37 * 38 * C struct representation of the VUI parameters as defined by Rec. ITU-T 39 * H.264 (04/2017) E.1.1 VUI parameters syntax. 40 */ 41 struct nal_h264_vui_parameters { 42 unsigned int aspect_ratio_info_present_flag; 43 struct { 44 unsigned int aspect_ratio_idc; 45 unsigned int sar_width; 46 unsigned int sar_height; 47 }; 48 unsigned int overscan_info_present_flag; 49 unsigned int overscan_appropriate_flag; 50 unsigned int video_signal_type_present_flag; 51 struct { 52 unsigned int video_format; 53 unsigned int video_full_range_flag; 54 unsigned int colour_description_present_flag; 55 struct { 56 unsigned int colour_primaries; 57 unsigned int transfer_characteristics; 58 unsigned int matrix_coefficients; 59 }; 60 }; 61 unsigned int chroma_loc_info_present_flag; 62 struct { 63 unsigned int chroma_sample_loc_type_top_field; 64 unsigned int chroma_sample_loc_type_bottom_field; 65 }; 66 unsigned int timing_info_present_flag; 67 struct { 68 unsigned int num_units_in_tick; 69 unsigned int time_scale; 70 unsigned int fixed_frame_rate_flag; 71 }; 72 unsigned int nal_hrd_parameters_present_flag; 73 struct nal_h264_hrd_parameters nal_hrd_parameters; 74 unsigned int vcl_hrd_parameters_present_flag; 75 struct nal_h264_hrd_parameters vcl_hrd_parameters; 76 unsigned int low_delay_hrd_flag; 77 unsigned int pic_struct_present_flag; 78 unsigned int bitstream_restriction_flag; 79 struct { 80 unsigned int motion_vectors_over_pic_boundaries_flag; 81 unsigned int max_bytes_per_pic_denom; 82 unsigned int max_bits_per_mb_denom; 83 unsigned int log2_max_mv_length_horizontal; 84 unsigned int log21_max_mv_length_vertical; 85 unsigned int max_num_reorder_frames; 86 unsigned int max_dec_frame_buffering; 87 }; 88 }; 89 90 /* 91 * struct nal_h264_sps - Sequence parameter set 92 * 93 * C struct representation of the sequence parameter set NAL unit as defined by 94 * Rec. ITU-T H.264 (04/2017) 7.3.2.1.1 Sequence parameter set data syntax. 95 */ 96 struct nal_h264_sps { 97 unsigned int profile_idc; 98 unsigned int constraint_set0_flag; 99 unsigned int constraint_set1_flag; 100 unsigned int constraint_set2_flag; 101 unsigned int constraint_set3_flag; 102 unsigned int constraint_set4_flag; 103 unsigned int constraint_set5_flag; 104 unsigned int reserved_zero_2bits; 105 unsigned int level_idc; 106 unsigned int seq_parameter_set_id; 107 struct { 108 unsigned int chroma_format_idc; 109 unsigned int separate_colour_plane_flag; 110 unsigned int bit_depth_luma_minus8; 111 unsigned int bit_depth_chroma_minus8; 112 unsigned int qpprime_y_zero_transform_bypass_flag; 113 unsigned int seq_scaling_matrix_present_flag; 114 }; 115 unsigned int log2_max_frame_num_minus4; 116 unsigned int pic_order_cnt_type; 117 union { 118 unsigned int log2_max_pic_order_cnt_lsb_minus4; 119 struct { 120 unsigned int delta_pic_order_always_zero_flag; 121 int offset_for_non_ref_pic; 122 int offset_for_top_to_bottom_field; 123 unsigned int num_ref_frames_in_pic_order_cnt_cycle; 124 int offset_for_ref_frame[255]; 125 }; 126 }; 127 unsigned int max_num_ref_frames; 128 unsigned int gaps_in_frame_num_value_allowed_flag; 129 unsigned int pic_width_in_mbs_minus1; 130 unsigned int pic_height_in_map_units_minus1; 131 unsigned int frame_mbs_only_flag; 132 unsigned int mb_adaptive_frame_field_flag; 133 unsigned int direct_8x8_inference_flag; 134 unsigned int frame_cropping_flag; 135 struct { 136 unsigned int crop_left; 137 unsigned int crop_right; 138 unsigned int crop_top; 139 unsigned int crop_bottom; 140 }; 141 unsigned int vui_parameters_present_flag; 142 struct nal_h264_vui_parameters vui; 143 }; 144 145 /* 146 * struct nal_h264_pps - Picture parameter set 147 * 148 * C struct representation of the picture parameter set NAL unit as defined by 149 * Rec. ITU-T H.264 (04/2017) 7.3.2.2 Picture parameter set RBSP syntax. 150 */ 151 struct nal_h264_pps { 152 unsigned int pic_parameter_set_id; 153 unsigned int seq_parameter_set_id; 154 unsigned int entropy_coding_mode_flag; 155 unsigned int bottom_field_pic_order_in_frame_present_flag; 156 unsigned int num_slice_groups_minus1; 157 unsigned int slice_group_map_type; 158 union { 159 unsigned int run_length_minus1[8]; 160 struct { 161 unsigned int top_left[8]; 162 unsigned int bottom_right[8]; 163 }; 164 struct { 165 unsigned int slice_group_change_direction_flag; 166 unsigned int slice_group_change_rate_minus1; 167 }; 168 struct { 169 unsigned int pic_size_in_map_units_minus1; 170 unsigned int slice_group_id[8]; 171 }; 172 }; 173 unsigned int num_ref_idx_l0_default_active_minus1; 174 unsigned int num_ref_idx_l1_default_active_minus1; 175 unsigned int weighted_pred_flag; 176 unsigned int weighted_bipred_idc; 177 int pic_init_qp_minus26; 178 int pic_init_qs_minus26; 179 int chroma_qp_index_offset; 180 unsigned int deblocking_filter_control_present_flag; 181 unsigned int constrained_intra_pred_flag; 182 unsigned int redundant_pic_cnt_present_flag; 183 struct { 184 unsigned int transform_8x8_mode_flag; 185 unsigned int pic_scaling_matrix_present_flag; 186 int second_chroma_qp_index_offset; 187 }; 188 }; 189 190 int nal_h264_profile_from_v4l2(enum v4l2_mpeg_video_h264_profile profile); 191 int nal_h264_level_from_v4l2(enum v4l2_mpeg_video_h264_level level); 192 193 ssize_t nal_h264_write_sps(const struct device *dev, 194 void *dest, size_t n, struct nal_h264_sps *sps); 195 ssize_t nal_h264_read_sps(const struct device *dev, 196 struct nal_h264_sps *sps, void *src, size_t n); 197 void nal_h264_print_sps(const struct device *dev, struct nal_h264_sps *sps); 198 199 ssize_t nal_h264_write_pps(const struct device *dev, 200 void *dest, size_t n, struct nal_h264_pps *pps); 201 ssize_t nal_h264_read_pps(const struct device *dev, 202 struct nal_h264_pps *pps, void *src, size_t n); 203 void nal_h264_print_pps(const struct device *dev, struct nal_h264_pps *pps); 204 205 ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n); 206 ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n); 207 208 #endif /* __NAL_H264_H__ */ 209