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/errno.h>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/v4l2-controls.h>
15 #include <linux/videodev2.h>
16
17 struct nal_hevc_profile_tier_level {
18 unsigned int general_profile_space;
19 unsigned int general_tier_flag;
20 unsigned int general_profile_idc;
21 unsigned int general_profile_compatibility_flag[32];
22 unsigned int general_progressive_source_flag;
23 unsigned int general_interlaced_source_flag;
24 unsigned int general_non_packed_constraint_flag;
25 unsigned int general_frame_only_constraint_flag;
26 union {
27 struct {
28 unsigned int general_max_12bit_constraint_flag;
29 unsigned int general_max_10bit_constraint_flag;
30 unsigned int general_max_8bit_constraint_flag;
31 unsigned int general_max_422chroma_constraint_flag;
32 unsigned int general_max_420chroma_constraint_flag;
33 unsigned int general_max_monochrome_constraint_flag;
34 unsigned int general_intra_constraint_flag;
35 unsigned int general_one_picture_only_constraint_flag;
36 unsigned int general_lower_bit_rate_constraint_flag;
37 union {
38 struct {
39 unsigned int general_max_14bit_constraint_flag;
40 unsigned int general_reserved_zero_33bits;
41 };
42 unsigned int general_reserved_zero_34bits;
43 };
44 };
45 struct {
46 unsigned int general_reserved_zero_7bits;
47 /* unsigned int general_one_picture_only_constraint_flag; */
48 unsigned int general_reserved_zero_35bits;
49 };
50 unsigned int general_reserved_zero_43bits;
51 };
52 union {
53 unsigned int general_inbld_flag;
54 unsigned int general_reserved_zero_bit;
55 };
56 unsigned int general_level_idc;
57 };
58
59 /*
60 * struct nal_hevc_vps - Video parameter set
61 *
62 * C struct representation of the video parameter set NAL unit as defined by
63 * Rec. ITU-T H.265 (02/2018) 7.3.2.1 Video parameter set RBSP syntax
64 */
65 struct nal_hevc_vps {
66 unsigned int video_parameter_set_id;
67 unsigned int base_layer_internal_flag;
68 unsigned int base_layer_available_flag;
69 unsigned int max_layers_minus1;
70 unsigned int max_sub_layers_minus1;
71 unsigned int temporal_id_nesting_flag;
72 struct nal_hevc_profile_tier_level profile_tier_level;
73 unsigned int sub_layer_ordering_info_present_flag;
74 struct {
75 unsigned int max_dec_pic_buffering_minus1[7];
76 unsigned int max_num_reorder_pics[7];
77 unsigned int max_latency_increase_plus1[7];
78 };
79 unsigned int max_layer_id;
80 unsigned int num_layer_sets_minus1;
81 unsigned int layer_id_included_flag[1024][64];
82 unsigned int timing_info_present_flag;
83 struct {
84 unsigned int num_units_in_tick;
85 unsigned int time_scale;
86 unsigned int poc_proportional_to_timing_flag;
87 unsigned int num_ticks_poc_diff_one_minus1;
88 unsigned int num_hrd_parameters;
89 struct {
90 unsigned int hrd_layer_set_idx[0];
91 unsigned int cprms_present_flag[0];
92 };
93 /* hrd_parameters( cprms_present_flag[ i ], max_sub_layers_minus1 ) */
94 };
95 unsigned int extension_flag;
96 unsigned int extension_data_flag;
97 };
98
99 struct nal_hevc_sub_layer_hrd_parameters {
100 unsigned int bit_rate_value_minus1[1];
101 unsigned int cpb_size_value_minus1[1];
102 unsigned int cbr_flag[1];
103 };
104
105 struct nal_hevc_hrd_parameters {
106 unsigned int nal_hrd_parameters_present_flag;
107 unsigned int vcl_hrd_parameters_present_flag;
108 struct {
109 unsigned int sub_pic_hrd_params_present_flag;
110 struct {
111 unsigned int tick_divisor_minus2;
112 unsigned int du_cpb_removal_delay_increment_length_minus1;
113 unsigned int sub_pic_cpb_params_in_pic_timing_sei_flag;
114 unsigned int dpb_output_delay_du_length_minus1;
115 };
116 unsigned int bit_rate_scale;
117 unsigned int cpb_size_scale;
118 unsigned int cpb_size_du_scale;
119 unsigned int initial_cpb_removal_delay_length_minus1;
120 unsigned int au_cpb_removal_delay_length_minus1;
121 unsigned int dpb_output_delay_length_minus1;
122 };
123 struct {
124 unsigned int fixed_pic_rate_general_flag[1];
125 unsigned int fixed_pic_rate_within_cvs_flag[1];
126 unsigned int elemental_duration_in_tc_minus1[1];
127 unsigned int low_delay_hrd_flag[1];
128 unsigned int cpb_cnt_minus1[1];
129 struct nal_hevc_sub_layer_hrd_parameters nal_hrd[1];
130 struct nal_hevc_sub_layer_hrd_parameters vcl_hrd[1];
131 };
132 };
133
134 /*
135 * struct nal_hevc_vui_parameters - VUI parameters
136 *
137 * C struct representation of the VUI parameters as defined by Rec. ITU-T
138 * H.265 (02/2018) E.2.1 VUI parameters syntax.
139 */
140 struct nal_hevc_vui_parameters {
141 unsigned int aspect_ratio_info_present_flag;
142 struct {
143 unsigned int aspect_ratio_idc;
144 unsigned int sar_width;
145 unsigned int sar_height;
146 };
147 unsigned int overscan_info_present_flag;
148 unsigned int overscan_appropriate_flag;
149 unsigned int video_signal_type_present_flag;
150 struct {
151 unsigned int video_format;
152 unsigned int video_full_range_flag;
153 unsigned int colour_description_present_flag;
154 struct {
155 unsigned int colour_primaries;
156 unsigned int transfer_characteristics;
157 unsigned int matrix_coeffs;
158 };
159 };
160 unsigned int chroma_loc_info_present_flag;
161 struct {
162 unsigned int chroma_sample_loc_type_top_field;
163 unsigned int chroma_sample_loc_type_bottom_field;
164 };
165 unsigned int neutral_chroma_indication_flag;
166 unsigned int field_seq_flag;
167 unsigned int frame_field_info_present_flag;
168 unsigned int default_display_window_flag;
169 struct {
170 unsigned int def_disp_win_left_offset;
171 unsigned int def_disp_win_right_offset;
172 unsigned int def_disp_win_top_offset;
173 unsigned int def_disp_win_bottom_offset;
174 };
175 unsigned int vui_timing_info_present_flag;
176 struct {
177 unsigned int vui_num_units_in_tick;
178 unsigned int vui_time_scale;
179 unsigned int vui_poc_proportional_to_timing_flag;
180 unsigned int vui_num_ticks_poc_diff_one_minus1;
181 unsigned int vui_hrd_parameters_present_flag;
182 struct nal_hevc_hrd_parameters nal_hrd_parameters;
183 };
184 unsigned int bitstream_restriction_flag;
185 struct {
186 unsigned int tiles_fixed_structure_flag;
187 unsigned int motion_vectors_over_pic_boundaries_flag;
188 unsigned int restricted_ref_pic_lists_flag;
189 unsigned int min_spatial_segmentation_idc;
190 unsigned int max_bytes_per_pic_denom;
191 unsigned int max_bits_per_min_cu_denom;
192 unsigned int log2_max_mv_length_horizontal;
193 unsigned int log2_max_mv_length_vertical;
194 };
195 };
196
197 /*
198 * struct nal_hevc_sps - Sequence parameter set
199 *
200 * C struct representation of the video parameter set NAL unit as defined by
201 * Rec. ITU-T H.265 (02/2018) 7.3.2.2 Sequence parameter set RBSP syntax
202 */
203 struct nal_hevc_sps {
204 unsigned int video_parameter_set_id;
205 unsigned int max_sub_layers_minus1;
206 unsigned int temporal_id_nesting_flag;
207 struct nal_hevc_profile_tier_level profile_tier_level;
208 unsigned int seq_parameter_set_id;
209 unsigned int chroma_format_idc;
210 unsigned int separate_colour_plane_flag;
211 unsigned int pic_width_in_luma_samples;
212 unsigned int pic_height_in_luma_samples;
213 unsigned int conformance_window_flag;
214 struct {
215 unsigned int conf_win_left_offset;
216 unsigned int conf_win_right_offset;
217 unsigned int conf_win_top_offset;
218 unsigned int conf_win_bottom_offset;
219 };
220
221 unsigned int bit_depth_luma_minus8;
222 unsigned int bit_depth_chroma_minus8;
223 unsigned int log2_max_pic_order_cnt_lsb_minus4;
224 unsigned int sub_layer_ordering_info_present_flag;
225 struct {
226 unsigned int max_dec_pic_buffering_minus1[7];
227 unsigned int max_num_reorder_pics[7];
228 unsigned int max_latency_increase_plus1[7];
229 };
230 unsigned int log2_min_luma_coding_block_size_minus3;
231 unsigned int log2_diff_max_min_luma_coding_block_size;
232 unsigned int log2_min_luma_transform_block_size_minus2;
233 unsigned int log2_diff_max_min_luma_transform_block_size;
234 unsigned int max_transform_hierarchy_depth_inter;
235 unsigned int max_transform_hierarchy_depth_intra;
236
237 unsigned int scaling_list_enabled_flag;
238 unsigned int scaling_list_data_present_flag;
239 unsigned int amp_enabled_flag;
240 unsigned int sample_adaptive_offset_enabled_flag;
241 unsigned int pcm_enabled_flag;
242 struct {
243 unsigned int pcm_sample_bit_depth_luma_minus1;
244 unsigned int pcm_sample_bit_depth_chroma_minus1;
245 unsigned int log2_min_pcm_luma_coding_block_size_minus3;
246 unsigned int log2_diff_max_min_pcm_luma_coding_block_size;
247 unsigned int pcm_loop_filter_disabled_flag;
248 };
249
250 unsigned int num_short_term_ref_pic_sets;
251 unsigned int long_term_ref_pics_present_flag;
252 unsigned int sps_temporal_mvp_enabled_flag;
253 unsigned int strong_intra_smoothing_enabled_flag;
254 unsigned int vui_parameters_present_flag;
255 struct nal_hevc_vui_parameters vui;
256 unsigned int extension_present_flag;
257 struct {
258 unsigned int sps_range_extension_flag;
259 unsigned int sps_multilayer_extension_flag;
260 unsigned int sps_3d_extension_flag;
261 unsigned int sps_scc_extension_flag;
262 unsigned int sps_extension_4bits;
263 };
264 };
265
266 struct nal_hevc_pps {
267 unsigned int pps_pic_parameter_set_id;
268 unsigned int pps_seq_parameter_set_id;
269 unsigned int dependent_slice_segments_enabled_flag;
270 unsigned int output_flag_present_flag;
271 unsigned int num_extra_slice_header_bits;
272 unsigned int sign_data_hiding_enabled_flag;
273 unsigned int cabac_init_present_flag;
274 unsigned int num_ref_idx_l0_default_active_minus1;
275 unsigned int num_ref_idx_l1_default_active_minus1;
276 int init_qp_minus26;
277 unsigned int constrained_intra_pred_flag;
278 unsigned int transform_skip_enabled_flag;
279 unsigned int cu_qp_delta_enabled_flag;
280 unsigned int diff_cu_qp_delta_depth;
281 int pps_cb_qp_offset;
282 int pps_cr_qp_offset;
283 unsigned int pps_slice_chroma_qp_offsets_present_flag;
284 unsigned int weighted_pred_flag;
285 unsigned int weighted_bipred_flag;
286 unsigned int transquant_bypass_enabled_flag;
287 unsigned int tiles_enabled_flag;
288 unsigned int entropy_coding_sync_enabled_flag;
289 struct {
290 unsigned int num_tile_columns_minus1;
291 unsigned int num_tile_rows_minus1;
292 unsigned int uniform_spacing_flag;
293 struct {
294 unsigned int column_width_minus1[1];
295 unsigned int row_height_minus1[1];
296 };
297 unsigned int loop_filter_across_tiles_enabled_flag;
298 };
299 unsigned int pps_loop_filter_across_slices_enabled_flag;
300 unsigned int deblocking_filter_control_present_flag;
301 struct {
302 unsigned int deblocking_filter_override_enabled_flag;
303 unsigned int pps_deblocking_filter_disabled_flag;
304 struct {
305 int pps_beta_offset_div2;
306 int pps_tc_offset_div2;
307 };
308 };
309 unsigned int pps_scaling_list_data_present_flag;
310 unsigned int lists_modification_present_flag;
311 unsigned int log2_parallel_merge_level_minus2;
312 unsigned int slice_segment_header_extension_present_flag;
313 unsigned int pps_extension_present_flag;
314 struct {
315 unsigned int pps_range_extension_flag;
316 unsigned int pps_multilayer_extension_flag;
317 unsigned int pps_3d_extension_flag;
318 unsigned int pps_scc_extension_flag;
319 unsigned int pps_extension_4bits;
320 };
321 };
322
323 /**
324 * nal_hevc_profile() - Get profile_idc for v4l2 hevc profile
325 * @profile: the profile as &enum v4l2_mpeg_video_hevc_profile
326 *
327 * Convert the &enum v4l2_mpeg_video_hevc_profile to profile_idc as specified
328 * in Rec. ITU-T H.265 (02/2018) A.3.
329 *
330 * Return: the profile_idc for the passed level
331 */
nal_hevc_profile(enum v4l2_mpeg_video_hevc_profile profile)332 static inline int nal_hevc_profile(enum v4l2_mpeg_video_hevc_profile profile)
333 {
334 switch (profile) {
335 case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN:
336 return 1;
337 case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10:
338 return 2;
339 case V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE:
340 return 3;
341 default:
342 return -EINVAL;
343 }
344 }
345
346 /**
347 * nal_hevc_tier() - Get tier_flag for v4l2 hevc tier
348 * @tier: the tier as &enum v4l2_mpeg_video_hevc_tier
349 *
350 * Convert the &enum v4l2_mpeg_video_hevc_tier to tier_flag as specified
351 * in Rec. ITU-T H.265 (02/2018) A.4.1.
352 *
353 * Return: the tier_flag for the passed tier
354 */
nal_hevc_tier(enum v4l2_mpeg_video_hevc_tier tier)355 static inline int nal_hevc_tier(enum v4l2_mpeg_video_hevc_tier tier)
356 {
357 switch (tier) {
358 case V4L2_MPEG_VIDEO_HEVC_TIER_MAIN:
359 return 0;
360 case V4L2_MPEG_VIDEO_HEVC_TIER_HIGH:
361 return 1;
362 default:
363 return -EINVAL;
364 }
365 }
366
367 /**
368 * nal_hevc_level() - Get level_idc for v4l2 hevc level
369 * @level: the level as &enum v4l2_mpeg_video_hevc_level
370 *
371 * Convert the &enum v4l2_mpeg_video_hevc_level to level_idc as specified in
372 * Rec. ITU-T H.265 (02/2018) A.4.1.
373 *
374 * Return: the level_idc for the passed level
375 */
nal_hevc_level(enum v4l2_mpeg_video_hevc_level level)376 static inline int nal_hevc_level(enum v4l2_mpeg_video_hevc_level level)
377 {
378 /*
379 * T-Rec-H.265 p. 280: general_level_idc and sub_layer_level_idc[ i ]
380 * shall be set equal to a value of 30 times the level number
381 * specified in Table A.6.
382 */
383 int factor = 30 / 10;
384
385 switch (level) {
386 case V4L2_MPEG_VIDEO_HEVC_LEVEL_1:
387 return factor * 10;
388 case V4L2_MPEG_VIDEO_HEVC_LEVEL_2:
389 return factor * 20;
390 case V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1:
391 return factor * 21;
392 case V4L2_MPEG_VIDEO_HEVC_LEVEL_3:
393 return factor * 30;
394 case V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1:
395 return factor * 31;
396 case V4L2_MPEG_VIDEO_HEVC_LEVEL_4:
397 return factor * 40;
398 case V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1:
399 return factor * 41;
400 case V4L2_MPEG_VIDEO_HEVC_LEVEL_5:
401 return factor * 50;
402 case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1:
403 return factor * 51;
404 case V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2:
405 return factor * 52;
406 case V4L2_MPEG_VIDEO_HEVC_LEVEL_6:
407 return factor * 60;
408 case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1:
409 return factor * 61;
410 case V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2:
411 return factor * 62;
412 default:
413 return -EINVAL;
414 }
415 }
416
nal_hevc_full_range(enum v4l2_quantization quantization)417 static inline int nal_hevc_full_range(enum v4l2_quantization quantization)
418 {
419 switch (quantization) {
420 case V4L2_QUANTIZATION_FULL_RANGE:
421 return 1;
422 case V4L2_QUANTIZATION_LIM_RANGE:
423 return 0;
424 default:
425 break;
426 }
427
428 return 0;
429 }
430
nal_hevc_color_primaries(enum v4l2_colorspace colorspace)431 static inline int nal_hevc_color_primaries(enum v4l2_colorspace colorspace)
432 {
433 switch (colorspace) {
434 case V4L2_COLORSPACE_SMPTE170M:
435 return 6;
436 case V4L2_COLORSPACE_SMPTE240M:
437 return 7;
438 case V4L2_COLORSPACE_REC709:
439 return 1;
440 case V4L2_COLORSPACE_470_SYSTEM_M:
441 return 4;
442 case V4L2_COLORSPACE_JPEG:
443 case V4L2_COLORSPACE_SRGB:
444 case V4L2_COLORSPACE_470_SYSTEM_BG:
445 return 5;
446 case V4L2_COLORSPACE_BT2020:
447 return 9;
448 case V4L2_COLORSPACE_DEFAULT:
449 case V4L2_COLORSPACE_OPRGB:
450 case V4L2_COLORSPACE_RAW:
451 case V4L2_COLORSPACE_DCI_P3:
452 default:
453 return 2;
454 }
455 }
456
nal_hevc_transfer_characteristics(enum v4l2_colorspace colorspace,enum v4l2_xfer_func xfer_func)457 static inline int nal_hevc_transfer_characteristics(enum v4l2_colorspace colorspace,
458 enum v4l2_xfer_func xfer_func)
459 {
460 if (xfer_func == V4L2_XFER_FUNC_DEFAULT)
461 xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(colorspace);
462
463 switch (xfer_func) {
464 case V4L2_XFER_FUNC_709:
465 return 6;
466 case V4L2_XFER_FUNC_SMPTE2084:
467 return 16;
468 case V4L2_XFER_FUNC_SRGB:
469 case V4L2_XFER_FUNC_OPRGB:
470 case V4L2_XFER_FUNC_NONE:
471 case V4L2_XFER_FUNC_DCI_P3:
472 case V4L2_XFER_FUNC_SMPTE240M:
473 default:
474 return 2;
475 }
476 }
477
nal_hevc_matrix_coeffs(enum v4l2_colorspace colorspace,enum v4l2_ycbcr_encoding ycbcr_encoding)478 static inline int nal_hevc_matrix_coeffs(enum v4l2_colorspace colorspace,
479 enum v4l2_ycbcr_encoding ycbcr_encoding)
480 {
481 if (ycbcr_encoding == V4L2_YCBCR_ENC_DEFAULT)
482 ycbcr_encoding = V4L2_MAP_YCBCR_ENC_DEFAULT(colorspace);
483
484 switch (ycbcr_encoding) {
485 case V4L2_YCBCR_ENC_601:
486 case V4L2_YCBCR_ENC_XV601:
487 return 5;
488 case V4L2_YCBCR_ENC_709:
489 case V4L2_YCBCR_ENC_XV709:
490 return 1;
491 case V4L2_YCBCR_ENC_BT2020:
492 return 9;
493 case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
494 return 10;
495 case V4L2_YCBCR_ENC_SMPTE240M:
496 default:
497 return 2;
498 }
499 }
500
501 ssize_t nal_hevc_write_vps(const struct device *dev,
502 void *dest, size_t n, struct nal_hevc_vps *vps);
503 ssize_t nal_hevc_read_vps(const struct device *dev,
504 struct nal_hevc_vps *vps, void *src, size_t n);
505
506 ssize_t nal_hevc_write_sps(const struct device *dev,
507 void *dest, size_t n, struct nal_hevc_sps *sps);
508 ssize_t nal_hevc_read_sps(const struct device *dev,
509 struct nal_hevc_sps *sps, void *src, size_t n);
510
511 ssize_t nal_hevc_write_pps(const struct device *dev,
512 void *dest, size_t n, struct nal_hevc_pps *pps);
513 ssize_t nal_hevc_read_pps(const struct device *dev,
514 struct nal_hevc_pps *pps, void *src, size_t n);
515
516 ssize_t nal_hevc_write_filler(const struct device *dev, void *dest, size_t n);
517 ssize_t nal_hevc_read_filler(const struct device *dev, void *src, size_t n);
518
519 #endif /* __NAL_HEVC_H__ */
520