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_HEVC_H__
9 #define __NAL_HEVC_H__
10 
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <media/v4l2-ctrls.h>
14 
15 struct nal_hevc_profile_tier_level {
16 	unsigned int general_profile_space;
17 	unsigned int general_tier_flag;
18 	unsigned int general_profile_idc;
19 	unsigned int general_profile_compatibility_flag[32];
20 	unsigned int general_progressive_source_flag;
21 	unsigned int general_interlaced_source_flag;
22 	unsigned int general_non_packed_constraint_flag;
23 	unsigned int general_frame_only_constraint_flag;
24 	union {
25 		struct {
26 			unsigned int general_max_12bit_constraint_flag;
27 			unsigned int general_max_10bit_constraint_flag;
28 			unsigned int general_max_8bit_constraint_flag;
29 			unsigned int general_max_422chroma_constraint_flag;
30 			unsigned int general_max_420chroma_constraint_flag;
31 			unsigned int general_max_monochrome_constraint_flag;
32 			unsigned int general_intra_constraint_flag;
33 			unsigned int general_one_picture_only_constraint_flag;
34 			unsigned int general_lower_bit_rate_constraint_flag;
35 			union {
36 				struct {
37 					unsigned int general_max_14bit_constraint_flag;
38 					unsigned int general_reserved_zero_33bits;
39 				};
40 				unsigned int general_reserved_zero_34bits;
41 			};
42 		};
43 		struct {
44 			unsigned int general_reserved_zero_7bits;
45 			/* unsigned int general_one_picture_only_constraint_flag; */
46 			unsigned int general_reserved_zero_35bits;
47 		};
48 		unsigned int general_reserved_zero_43bits;
49 	};
50 	union {
51 		unsigned int general_inbld_flag;
52 		unsigned int general_reserved_zero_bit;
53 	};
54 	unsigned int general_level_idc;
55 };
56 
57 /*
58  * struct nal_hevc_vps - Video parameter set
59  *
60  * C struct representation of the video parameter set NAL unit as defined by
61  * Rec. ITU-T H.265 (02/2018) 7.3.2.1 Video parameter set RBSP syntax
62  */
63 struct nal_hevc_vps {
64 	unsigned int video_parameter_set_id;
65 	unsigned int base_layer_internal_flag;
66 	unsigned int base_layer_available_flag;
67 	unsigned int max_layers_minus1;
68 	unsigned int max_sub_layers_minus1;
69 	unsigned int temporal_id_nesting_flag;
70 	struct nal_hevc_profile_tier_level profile_tier_level;
71 	unsigned int sub_layer_ordering_info_present_flag;
72 	struct {
73 		unsigned int max_dec_pic_buffering_minus1[7];
74 		unsigned int max_num_reorder_pics[7];
75 		unsigned int max_latency_increase_plus1[7];
76 	};
77 	unsigned int max_layer_id;
78 	unsigned int num_layer_sets_minus1;
79 	unsigned int layer_id_included_flag[1024][64];
80 	unsigned int timing_info_present_flag;
81 	struct {
82 		unsigned int num_units_in_tick;
83 		unsigned int time_scale;
84 		unsigned int poc_proportional_to_timing_flag;
85 		unsigned int num_ticks_poc_diff_one_minus1;
86 		unsigned int num_hrd_parameters;
87 		struct {
88 			unsigned int hrd_layer_set_idx[0];
89 			unsigned int cprms_present_flag[0];
90 		};
91 		/* hrd_parameters( cprms_present_flag[ i ], max_sub_layers_minus1 ) */
92 	};
93 	unsigned int extension_flag;
94 	unsigned int extension_data_flag;
95 };
96 
97 struct nal_hevc_sub_layer_hrd_parameters {
98 	unsigned int bit_rate_value_minus1[1];
99 	unsigned int cpb_size_value_minus1[1];
100 	unsigned int cbr_flag[1];
101 };
102 
103 struct nal_hevc_hrd_parameters {
104 	unsigned int nal_hrd_parameters_present_flag;
105 	unsigned int vcl_hrd_parameters_present_flag;
106 	struct {
107 		unsigned int sub_pic_hrd_params_present_flag;
108 		struct {
109 			unsigned int tick_divisor_minus2;
110 			unsigned int du_cpb_removal_delay_increment_length_minus1;
111 			unsigned int sub_pic_cpb_params_in_pic_timing_sei_flag;
112 			unsigned int dpb_output_delay_du_length_minus1;
113 		};
114 		unsigned int bit_rate_scale;
115 		unsigned int cpb_size_scale;
116 		unsigned int cpb_size_du_scale;
117 		unsigned int initial_cpb_removal_delay_length_minus1;
118 		unsigned int au_cpb_removal_delay_length_minus1;
119 		unsigned int dpb_output_delay_length_minus1;
120 	};
121 	struct {
122 		unsigned int fixed_pic_rate_general_flag[1];
123 		unsigned int fixed_pic_rate_within_cvs_flag[1];
124 		unsigned int elemental_duration_in_tc_minus1[1];
125 		unsigned int low_delay_hrd_flag[1];
126 		unsigned int cpb_cnt_minus1[1];
127 		struct nal_hevc_sub_layer_hrd_parameters nal_hrd[1];
128 		struct nal_hevc_sub_layer_hrd_parameters vcl_hrd[1];
129 	};
130 };
131 
132 /*
133  * struct nal_hevc_vui_parameters - VUI parameters
134  *
135  * C struct representation of the VUI parameters as defined by Rec. ITU-T
136  * H.265 (02/2018) E.2.1 VUI parameters syntax.
137  */
138 struct nal_hevc_vui_parameters {
139 	unsigned int aspect_ratio_info_present_flag;
140 	struct {
141 		unsigned int aspect_ratio_idc;
142 		unsigned int sar_width;
143 		unsigned int sar_height;
144 	};
145 	unsigned int overscan_info_present_flag;
146 	unsigned int overscan_appropriate_flag;
147 	unsigned int video_signal_type_present_flag;
148 	struct {
149 		unsigned int video_format;
150 		unsigned int video_full_range_flag;
151 		unsigned int colour_description_present_flag;
152 		struct {
153 			unsigned int colour_primaries;
154 			unsigned int transfer_characteristics;
155 			unsigned int matrix_coeffs;
156 		};
157 	};
158 	unsigned int chroma_loc_info_present_flag;
159 	struct {
160 		unsigned int chroma_sample_loc_type_top_field;
161 		unsigned int chroma_sample_loc_type_bottom_field;
162 	};
163 	unsigned int neutral_chroma_indication_flag;
164 	unsigned int field_seq_flag;
165 	unsigned int frame_field_info_present_flag;
166 	unsigned int default_display_window_flag;
167 	struct {
168 		unsigned int def_disp_win_left_offset;
169 		unsigned int def_disp_win_right_offset;
170 		unsigned int def_disp_win_top_offset;
171 		unsigned int def_disp_win_bottom_offset;
172 	};
173 	unsigned int vui_timing_info_present_flag;
174 	struct {
175 		unsigned int vui_num_units_in_tick;
176 		unsigned int vui_time_scale;
177 		unsigned int vui_poc_proportional_to_timing_flag;
178 		unsigned int vui_num_ticks_poc_diff_one_minus1;
179 		unsigned int vui_hrd_parameters_present_flag;
180 		struct nal_hevc_hrd_parameters nal_hrd_parameters;
181 	};
182 	unsigned int bitstream_restriction_flag;
183 	struct {
184 		unsigned int tiles_fixed_structure_flag;
185 		unsigned int motion_vectors_over_pic_boundaries_flag;
186 		unsigned int restricted_ref_pic_lists_flag;
187 		unsigned int min_spatial_segmentation_idc;
188 		unsigned int max_bytes_per_pic_denom;
189 		unsigned int max_bits_per_min_cu_denom;
190 		unsigned int log2_max_mv_length_horizontal;
191 		unsigned int log2_max_mv_length_vertical;
192 	};
193 };
194 
195 /*
196  * struct nal_hevc_sps - Sequence parameter set
197  *
198  * C struct representation of the video parameter set NAL unit as defined by
199  * Rec. ITU-T H.265 (02/2018) 7.3.2.2 Sequence parameter set RBSP syntax
200  */
201 struct nal_hevc_sps {
202 	unsigned int video_parameter_set_id;
203 	unsigned int max_sub_layers_minus1;
204 	unsigned int temporal_id_nesting_flag;
205 	struct nal_hevc_profile_tier_level profile_tier_level;
206 	unsigned int seq_parameter_set_id;
207 	unsigned int chroma_format_idc;
208 	unsigned int separate_colour_plane_flag;
209 	unsigned int pic_width_in_luma_samples;
210 	unsigned int pic_height_in_luma_samples;
211 	unsigned int conformance_window_flag;
212 	struct {
213 		unsigned int conf_win_left_offset;
214 		unsigned int conf_win_right_offset;
215 		unsigned int conf_win_top_offset;
216 		unsigned int conf_win_bottom_offset;
217 	};
218 
219 	unsigned int bit_depth_luma_minus8;
220 	unsigned int bit_depth_chroma_minus8;
221 	unsigned int log2_max_pic_order_cnt_lsb_minus4;
222 	unsigned int sub_layer_ordering_info_present_flag;
223 	struct {
224 		unsigned int max_dec_pic_buffering_minus1[7];
225 		unsigned int max_num_reorder_pics[7];
226 		unsigned int max_latency_increase_plus1[7];
227 	};
228 	unsigned int log2_min_luma_coding_block_size_minus3;
229 	unsigned int log2_diff_max_min_luma_coding_block_size;
230 	unsigned int log2_min_luma_transform_block_size_minus2;
231 	unsigned int log2_diff_max_min_luma_transform_block_size;
232 	unsigned int max_transform_hierarchy_depth_inter;
233 	unsigned int max_transform_hierarchy_depth_intra;
234 
235 	unsigned int scaling_list_enabled_flag;
236 	unsigned int scaling_list_data_present_flag;
237 	unsigned int amp_enabled_flag;
238 	unsigned int sample_adaptive_offset_enabled_flag;
239 	unsigned int pcm_enabled_flag;
240 	struct {
241 		unsigned int pcm_sample_bit_depth_luma_minus1;
242 		unsigned int pcm_sample_bit_depth_chroma_minus1;
243 		unsigned int log2_min_pcm_luma_coding_block_size_minus3;
244 		unsigned int log2_diff_max_min_pcm_luma_coding_block_size;
245 		unsigned int pcm_loop_filter_disabled_flag;
246 	};
247 
248 	unsigned int num_short_term_ref_pic_sets;
249 	unsigned int long_term_ref_pics_present_flag;
250 	unsigned int sps_temporal_mvp_enabled_flag;
251 	unsigned int strong_intra_smoothing_enabled_flag;
252 	unsigned int vui_parameters_present_flag;
253 	struct nal_hevc_vui_parameters vui;
254 	unsigned int extension_present_flag;
255 	struct {
256 		unsigned int sps_range_extension_flag;
257 		unsigned int sps_multilayer_extension_flag;
258 		unsigned int sps_3d_extension_flag;
259 		unsigned int sps_scc_extension_flag;
260 		unsigned int sps_extension_4bits;
261 	};
262 };
263 
264 struct nal_hevc_pps {
265 	unsigned int pps_pic_parameter_set_id;
266 	unsigned int pps_seq_parameter_set_id;
267 	unsigned int dependent_slice_segments_enabled_flag;
268 	unsigned int output_flag_present_flag;
269 	unsigned int num_extra_slice_header_bits;
270 	unsigned int sign_data_hiding_enabled_flag;
271 	unsigned int cabac_init_present_flag;
272 	unsigned int num_ref_idx_l0_default_active_minus1;
273 	unsigned int num_ref_idx_l1_default_active_minus1;
274 	int init_qp_minus26;
275 	unsigned int constrained_intra_pred_flag;
276 	unsigned int transform_skip_enabled_flag;
277 	unsigned int cu_qp_delta_enabled_flag;
278 	unsigned int diff_cu_qp_delta_depth;
279 	int pps_cb_qp_offset;
280 	int pps_cr_qp_offset;
281 	unsigned int pps_slice_chroma_qp_offsets_present_flag;
282 	unsigned int weighted_pred_flag;
283 	unsigned int weighted_bipred_flag;
284 	unsigned int transquant_bypass_enabled_flag;
285 	unsigned int tiles_enabled_flag;
286 	unsigned int entropy_coding_sync_enabled_flag;
287 	struct {
288 		unsigned int num_tile_columns_minus1;
289 		unsigned int num_tile_rows_minus1;
290 		unsigned int uniform_spacing_flag;
291 		struct {
292 			unsigned int column_width_minus1[1];
293 			unsigned int row_height_minus1[1];
294 		};
295 		unsigned int loop_filter_across_tiles_enabled_flag;
296 	};
297 	unsigned int pps_loop_filter_across_slices_enabled_flag;
298 	unsigned int deblocking_filter_control_present_flag;
299 	struct {
300 		unsigned int deblocking_filter_override_enabled_flag;
301 		unsigned int pps_deblocking_filter_disabled_flag;
302 		struct {
303 			int pps_beta_offset_div2;
304 			int pps_tc_offset_div2;
305 		};
306 	};
307 	unsigned int pps_scaling_list_data_present_flag;
308 	unsigned int lists_modification_present_flag;
309 	unsigned int log2_parallel_merge_level_minus2;
310 	unsigned int slice_segment_header_extension_present_flag;
311 	unsigned int pps_extension_present_flag;
312 	struct {
313 		unsigned int pps_range_extension_flag;
314 		unsigned int pps_multilayer_extension_flag;
315 		unsigned int pps_3d_extension_flag;
316 		unsigned int pps_scc_extension_flag;
317 		unsigned int pps_extension_4bits;
318 	};
319 };
320 
321 int nal_hevc_profile_from_v4l2(enum v4l2_mpeg_video_hevc_profile profile);
322 int nal_hevc_tier_from_v4l2(enum v4l2_mpeg_video_hevc_tier tier);
323 int nal_hevc_level_from_v4l2(enum v4l2_mpeg_video_hevc_level level);
324 
325 int nal_range_from_v4l2(enum v4l2_quantization quantization);
326 int nal_color_primaries_from_v4l2(enum v4l2_colorspace colorspace);
327 int nal_transfer_characteristics_from_v4l2(enum v4l2_colorspace colorspace,
328 					   enum v4l2_xfer_func xfer_func);
329 int nal_matrix_coeffs_from_v4l2(enum v4l2_colorspace colorspace,
330 				enum v4l2_ycbcr_encoding ycbcr_encoding);
331 
332 ssize_t nal_hevc_write_vps(const struct device *dev,
333 			   void *dest, size_t n, struct nal_hevc_vps *vps);
334 ssize_t nal_hevc_read_vps(const struct device *dev,
335 			  struct nal_hevc_vps *vps, void *src, size_t n);
336 
337 ssize_t nal_hevc_write_sps(const struct device *dev,
338 			   void *dest, size_t n, struct nal_hevc_sps *sps);
339 ssize_t nal_hevc_read_sps(const struct device *dev,
340 			  struct nal_hevc_sps *sps, void *src, size_t n);
341 
342 ssize_t nal_hevc_write_pps(const struct device *dev,
343 			   void *dest, size_t n, struct nal_hevc_pps *pps);
344 ssize_t nal_hevc_read_pps(const struct device *dev,
345 			  struct nal_hevc_pps *pps, void *src, size_t n);
346 
347 ssize_t nal_hevc_write_filler(const struct device *dev, void *dest, size_t n);
348 ssize_t nal_hevc_read_filler(const struct device *dev, void *src, size_t n);
349 
350 #endif /* __NAL_HEVC_H__ */
351