drivers/media/platform/allegro-dvt/nal-h264.h

   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/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 /*
  18  * struct nal_h264_hrd_parameters - HRD parameters
  19  *
  20  * C struct representation of the sequence parameter set NAL unit as defined by
  21  * Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax.
  22  */
  23 struct nal_h264_hrd_parameters {
  24         unsigned int cpb_cnt_minus1;
  25         unsigned int bit_rate_scale;
  26         unsigned int cpb_size_scale;
  27         struct {
  28                 int bit_rate_value_minus1[16];
  29                 int cpb_size_value_minus1[16];
  30                 unsigned int cbr_flag[16];
  31         };
  32         unsigned int initial_cpb_removal_delay_length_minus1;
  33         unsigned int cpb_removal_delay_length_minus1;
  34         unsigned int dpb_output_delay_length_minus1;
  35         unsigned int time_offset_length;
  36 };
  37
  38 /*
  39  * struct nal_h264_vui_parameters - VUI parameters
  40  *
  41  * C struct representation of the VUI parameters as defined by Rec. ITU-T
  42  * H.264 (04/2017) E.1.1 VUI parameters syntax.
  43  */
  44 struct nal_h264_vui_parameters {
  45         unsigned int aspect_ratio_info_present_flag;
  46         struct {
  47                 unsigned int aspect_ratio_idc;
  48                 unsigned int sar_width;
  49                 unsigned int sar_height;
  50         };
  51         unsigned int overscan_info_present_flag;
  52         unsigned int overscan_appropriate_flag;
  53         unsigned int video_signal_type_present_flag;
  54         struct {
  55                 unsigned int video_format;
  56                 unsigned int video_full_range_flag;
  57                 unsigned int colour_description_present_flag;
  58                 struct {
  59                         unsigned int colour_primaries;
  60                         unsigned int transfer_characteristics;
  61                         unsigned int matrix_coefficients;
  62                 };
  63         };
  64         unsigned int chroma_loc_info_present_flag;
  65         struct {
  66                 unsigned int chroma_sample_loc_type_top_field;
  67                 unsigned int chroma_sample_loc_type_bottom_field;
  68         };
  69         unsigned int timing_info_present_flag;
  70         struct {
  71                 unsigned int num_units_in_tick;
  72                 unsigned int time_scale;
  73                 unsigned int fixed_frame_rate_flag;
  74         };
  75         unsigned int nal_hrd_parameters_present_flag;
  76         struct nal_h264_hrd_parameters nal_hrd_parameters;
  77         unsigned int vcl_hrd_parameters_present_flag;
  78         struct nal_h264_hrd_parameters vcl_hrd_parameters;
  79         unsigned int low_delay_hrd_flag;
  80         unsigned int pic_struct_present_flag;
  81         unsigned int bitstream_restriction_flag;
  82         struct {
  83                 unsigned int motion_vectors_over_pic_boundaries_flag;
  84                 unsigned int max_bytes_per_pic_denom;
  85                 unsigned int max_bits_per_mb_denom;
  86                 unsigned int log2_max_mv_length_horizontal;
  87                 unsigned int log21_max_mv_length_vertical;
  88                 unsigned int max_num_reorder_frames;
  89                 unsigned int max_dec_frame_buffering;
  90         };
  91 };
  92
  93 /*
  94  * struct nal_h264_sps - Sequence parameter set
  95  *
  96  * C struct representation of the sequence parameter set NAL unit as defined by
  97  * Rec. ITU-T H.264 (04/2017) 7.3.2.1.1 Sequence parameter set data syntax.
  98  */
  99 struct nal_h264_sps {
 100         unsigned int profile_idc;
 101         unsigned int constraint_set0_flag;
 102         unsigned int constraint_set1_flag;
 103         unsigned int constraint_set2_flag;
 104         unsigned int constraint_set3_flag;
 105         unsigned int constraint_set4_flag;
 106         unsigned int constraint_set5_flag;
 107         unsigned int reserved_zero_2bits;
 108         unsigned int level_idc;
 109         unsigned int seq_parameter_set_id;
 110         struct {
 111                 unsigned int chroma_format_idc;
 112                 unsigned int separate_colour_plane_flag;
 113                 unsigned int bit_depth_luma_minus8;
 114                 unsigned int bit_depth_chroma_minus8;
 115                 unsigned int qpprime_y_zero_transform_bypass_flag;
 116                 unsigned int seq_scaling_matrix_present_flag;
 117         };
 118         unsigned int log2_max_frame_num_minus4;
 119         unsigned int pic_order_cnt_type;
 120         union {
 121                 unsigned int log2_max_pic_order_cnt_lsb_minus4;
 122                 struct {
 123                         unsigned int delta_pic_order_always_zero_flag;
 124                         int offset_for_non_ref_pic;
 125                         int offset_for_top_to_bottom_field;
 126                         unsigned int num_ref_frames_in_pic_order_cnt_cycle;
 127                         int offset_for_ref_frame[255];
 128                 };
 129         };
 130         unsigned int max_num_ref_frames;
 131         unsigned int gaps_in_frame_num_value_allowed_flag;
 132         unsigned int pic_width_in_mbs_minus1;
 133         unsigned int pic_height_in_map_units_minus1;
 134         unsigned int frame_mbs_only_flag;
 135         unsigned int mb_adaptive_frame_field_flag;
 136         unsigned int direct_8x8_inference_flag;
 137         unsigned int frame_cropping_flag;
 138         struct {
 139                 unsigned int crop_left;
 140                 unsigned int crop_right;
 141                 unsigned int crop_top;
 142                 unsigned int crop_bottom;
 143         };
 144         unsigned int vui_parameters_present_flag;
 145         struct nal_h264_vui_parameters vui;
 146 };
 147
 148 /*
 149  * struct nal_h264_pps - Picture parameter set
 150  *
 151  * C struct representation of the picture parameter set NAL unit as defined by
 152  * Rec. ITU-T H.264 (04/2017) 7.3.2.2 Picture parameter set RBSP syntax.
 153  */
 154 struct nal_h264_pps {
 155         unsigned int pic_parameter_set_id;
 156         unsigned int seq_parameter_set_id;
 157         unsigned int entropy_coding_mode_flag;
 158         unsigned int bottom_field_pic_order_in_frame_present_flag;
 159         unsigned int num_slice_groups_minus1;
 160         unsigned int slice_group_map_type;
 161         union {
 162                 unsigned int run_length_minus1[8];
 163                 struct {
 164                         unsigned int top_left[8];
 165                         unsigned int bottom_right[8];
 166                 };
 167                 struct {
 168                         unsigned int slice_group_change_direction_flag;
 169                         unsigned int slice_group_change_rate_minus1;
 170                 };
 171                 struct {
 172                         unsigned int pic_size_in_map_units_minus1;
 173                         unsigned int slice_group_id[8];
 174                 };
 175         };
 176         unsigned int num_ref_idx_l0_default_active_minus1;
 177         unsigned int num_ref_idx_l1_default_active_minus1;
 178         unsigned int weighted_pred_flag;
 179         unsigned int weighted_bipred_idc;
 180         int pic_init_qp_minus26;
 181         int pic_init_qs_minus26;
 182         int chroma_qp_index_offset;
 183         unsigned int deblocking_filter_control_present_flag;
 184         unsigned int constrained_intra_pred_flag;
 185         unsigned int redundant_pic_cnt_present_flag;
 186         struct {
 187                 unsigned int transform_8x8_mode_flag;
 188                 unsigned int pic_scaling_matrix_present_flag;
 189                 int second_chroma_qp_index_offset;
 190         };
 191 };
 192
 193 /**
 194  * nal_h264_profile() - Get profile_idc for v4l2 h264 profile
 195  * @profile: the profile as &enum v4l2_mpeg_video_h264_profile
 196  *
 197  * Convert the &enum v4l2_mpeg_video_h264_profile to profile_idc as specified
 198  * in Rec. ITU-T H.264 (04/2017) A.2.
 199  *
 200  * Return: the profile_idc for the passed level
 201  */
 202 static inline int nal_h264_profile(enum v4l2_mpeg_video_h264_profile profile)
 203 {
 204         switch (profile) {
 205         case V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE:
 206                 return 66;
 207         case V4L2_MPEG_VIDEO_H264_PROFILE_MAIN:
 208                 return 77;
 209         case V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED:
 210                 return 88;
 211         case V4L2_MPEG_VIDEO_H264_PROFILE_HIGH:
 212                 return 100;
 213         default:
 214                 return -EINVAL;
 215         }
 216 }
 217
 218 /**
 219  * nal_h264_level() - Get level_idc for v4l2 h264 level
 220  * @level: the level as &enum v4l2_mpeg_video_h264_level
 221  *
 222  * Convert the &enum v4l2_mpeg_video_h264_level to level_idc as specified in
 223  * Rec. ITU-T H.264 (04/2017) A.3.2.
 224  *
 225  * Return: the level_idc for the passed level
 226  */
 227 static inline int nal_h264_level(enum v4l2_mpeg_video_h264_level level)
 228 {
 229         switch (level) {
 230         case V4L2_MPEG_VIDEO_H264_LEVEL_1_0:
 231                 return 10;
 232         case V4L2_MPEG_VIDEO_H264_LEVEL_1B:
 233                 return 9;
 234         case V4L2_MPEG_VIDEO_H264_LEVEL_1_1:
 235                 return 11;
 236         case V4L2_MPEG_VIDEO_H264_LEVEL_1_2:
 237                 return 12;
 238         case V4L2_MPEG_VIDEO_H264_LEVEL_1_3:
 239                 return 13;
 240         case V4L2_MPEG_VIDEO_H264_LEVEL_2_0:
 241                 return 20;
 242         case V4L2_MPEG_VIDEO_H264_LEVEL_2_1:
 243                 return 21;
 244         case V4L2_MPEG_VIDEO_H264_LEVEL_2_2:
 245                 return 22;
 246         case V4L2_MPEG_VIDEO_H264_LEVEL_3_0:
 247                 return 30;
 248         case V4L2_MPEG_VIDEO_H264_LEVEL_3_1:
 249                 return 31;
 250         case V4L2_MPEG_VIDEO_H264_LEVEL_3_2:
 251                 return 32;
 252         case V4L2_MPEG_VIDEO_H264_LEVEL_4_0:
 253                 return 40;
 254         case V4L2_MPEG_VIDEO_H264_LEVEL_4_1:
 255                 return 41;
 256         case V4L2_MPEG_VIDEO_H264_LEVEL_4_2:
 257                 return 42;
 258         case V4L2_MPEG_VIDEO_H264_LEVEL_5_0:
 259                 return 50;
 260         case V4L2_MPEG_VIDEO_H264_LEVEL_5_1:
 261                 return 51;
 262         default:
 263                 return -EINVAL;
 264         }
 265 }
 266
 267 /**
 268  * nal_h264_full_range() - Get video_full_range_flag for v4l2 quantization
 269  * @quantization: the quantization type as &enum v4l2_quantization
 270  *
 271  * Convert the &enum v4l2_quantization to video_full_range_flag as specified in
 272  * Rec. ITU-T H.264 (04/2017) E.2.1.
 273  *
 274  * Return: the video_full_range_flag value for the passed quantization
 275  */
 276 static inline int nal_h264_full_range(enum v4l2_quantization quantization)
 277 {
 278         switch (quantization) {
 279         case V4L2_QUANTIZATION_FULL_RANGE:
 280                 return 1;
 281         case V4L2_QUANTIZATION_LIM_RANGE:
 282                 return 0;
 283         default:
 284                 break;
 285         }
 286
 287         return 0;
 288 }
 289
 290 /**
 291  * nal_h264_color_primaries() - Get color_primaries for v4l2 colorspace
 292  * @colorspace: the color space as &enum v4l2_colorspace
 293  *
 294  * Convert the &enum v4l2_colorspace to color_primaries as specified in
 295  * Rec. ITU-T H.264 (04/2017) E.2.1.
 296  *
 297  * Return: the color_primaries value for the passed colorspace
 298  */
 299 static inline int nal_h264_color_primaries(enum v4l2_colorspace colorspace)
 300 {
 301         switch (colorspace) {
 302         case V4L2_COLORSPACE_SMPTE170M:
 303                 return 6;
 304         case V4L2_COLORSPACE_SMPTE240M:
 305                 return 7;
 306         case V4L2_COLORSPACE_REC709:
 307                 return 1;
 308         case V4L2_COLORSPACE_470_SYSTEM_M:
 309                 return 4;
 310         case V4L2_COLORSPACE_JPEG:
 311         case V4L2_COLORSPACE_SRGB:
 312         case V4L2_COLORSPACE_470_SYSTEM_BG:
 313                 return 5;
 314         case V4L2_COLORSPACE_BT2020:
 315                 return 9;
 316         case V4L2_COLORSPACE_DEFAULT:
 317         case V4L2_COLORSPACE_OPRGB:
 318         case V4L2_COLORSPACE_RAW:
 319         case V4L2_COLORSPACE_DCI_P3:
 320         default:
 321                 return 2;
 322         }
 323 }
 324
 325 /**
 326  * nal_h264_transfer_characteristics() - Get transfer_characteristics for v4l2 xfer_func
 327  * @colorspace: the color space as &enum v4l2_colorspace
 328  * @xfer_func: the transfer function as &enum v4l2_xfer_func
 329  *
 330  * Convert the &enum v4l2_xfer_func to transfer_characteristics as specified in
 331  * Rec. ITU-T H.264 (04/2017) E.2.1.
 332  *
 333  * Return: the transfer_characteristics value for the passed transfer function
 334  */
 335 static inline int nal_h264_transfer_characteristics(enum v4l2_colorspace colorspace,
 336                                                     enum v4l2_xfer_func xfer_func)
 337 {
 338         if (xfer_func == V4L2_XFER_FUNC_DEFAULT)
 339                 xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(colorspace);
 340
 341         switch (xfer_func) {
 342         case V4L2_XFER_FUNC_709:
 343                 return 6;
 344         case V4L2_XFER_FUNC_SMPTE2084:
 345                 return 16;
 346         case V4L2_XFER_FUNC_SRGB:
 347         case V4L2_XFER_FUNC_OPRGB:
 348         case V4L2_XFER_FUNC_NONE:
 349         case V4L2_XFER_FUNC_DCI_P3:
 350         case V4L2_XFER_FUNC_SMPTE240M:
 351         default:
 352                 return 2;
 353         }
 354 }
 355
 356 /**
 357  * nal_h264_matrix_coeffs() - Get matrix_coefficients for v4l2 v4l2_ycbcr_encoding
 358  * @colorspace: the color space as &enum v4l2_colorspace
 359  * @ycbcr_encoding: the ycbcr encoding as &enum v4l2_ycbcr_encoding
 360  *
 361  * Convert the &enum v4l2_ycbcr_encoding to matrix_coefficients as specified in
 362  * Rec. ITU-T H.264 (04/2017) E.2.1.
 363  *
 364  * Return: the matrix_coefficients value for the passed encoding
 365  */
 366 static inline int nal_h264_matrix_coeffs(enum v4l2_colorspace colorspace,
 367                                          enum v4l2_ycbcr_encoding ycbcr_encoding)
 368 {
 369         if (ycbcr_encoding == V4L2_YCBCR_ENC_DEFAULT)
 370                 ycbcr_encoding = V4L2_MAP_YCBCR_ENC_DEFAULT(colorspace);
 371
 372         switch (ycbcr_encoding) {
 373         case V4L2_YCBCR_ENC_601:
 374         case V4L2_YCBCR_ENC_XV601:
 375                 return 5;
 376         case V4L2_YCBCR_ENC_709:
 377         case V4L2_YCBCR_ENC_XV709:
 378                 return 1;
 379         case V4L2_YCBCR_ENC_BT2020:
 380                 return 9;
 381         case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
 382                 return 10;
 383         case V4L2_YCBCR_ENC_SMPTE240M:
 384         default:
 385                 return 2;
 386         }
 387 }
 388
 389 ssize_t nal_h264_write_sps(const struct device *dev,
 390                            void *dest, size_t n, struct nal_h264_sps *sps);
 391 ssize_t nal_h264_read_sps(const struct device *dev,
 392                           struct nal_h264_sps *sps, void *src, size_t n);
 393 void nal_h264_print_sps(const struct device *dev, struct nal_h264_sps *sps);
 394
 395 ssize_t nal_h264_write_pps(const struct device *dev,
 396                            void *dest, size_t n, struct nal_h264_pps *pps);
 397 ssize_t nal_h264_read_pps(const struct device *dev,
 398                           struct nal_h264_pps *pps, void *src, size_t n);
 399 void nal_h264_print_pps(const struct device *dev, struct nal_h264_pps *pps);
 400
 401 ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n);
 402 ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n);
 403
 404 #endif /* __NAL_H264_H__ */