405 lines · c
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 parameters19 *20 * C struct representation of the sequence parameter set NAL unit as defined by21 * Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax.22 */23struct 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 parameters40 *41 * C struct representation of the VUI parameters as defined by Rec. ITU-T42 * H.264 (04/2017) E.1.1 VUI parameters syntax.43 */44struct 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 set95 *96 * C struct representation of the sequence parameter set NAL unit as defined by97 * Rec. ITU-T H.264 (04/2017) 7.3.2.1.1 Sequence parameter set data syntax.98 */99struct 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 set150 *151 * C struct representation of the picture parameter set NAL unit as defined by152 * Rec. ITU-T H.264 (04/2017) 7.3.2.2 Picture parameter set RBSP syntax.153 */154struct 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 profile195 * @profile: the profile as &enum v4l2_mpeg_video_h264_profile196 *197 * Convert the &enum v4l2_mpeg_video_h264_profile to profile_idc as specified198 * in Rec. ITU-T H.264 (04/2017) A.2.199 *200 * Return: the profile_idc for the passed level201 */202static 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 level220 * @level: the level as &enum v4l2_mpeg_video_h264_level221 *222 * Convert the &enum v4l2_mpeg_video_h264_level to level_idc as specified in223 * Rec. ITU-T H.264 (04/2017) A.3.2.224 *225 * Return: the level_idc for the passed level226 */227static 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 quantization269 * @quantization: the quantization type as &enum v4l2_quantization270 *271 * Convert the &enum v4l2_quantization to video_full_range_flag as specified in272 * Rec. ITU-T H.264 (04/2017) E.2.1.273 *274 * Return: the video_full_range_flag value for the passed quantization275 */276static 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 colorspace292 * @colorspace: the color space as &enum v4l2_colorspace293 *294 * Convert the &enum v4l2_colorspace to color_primaries as specified in295 * Rec. ITU-T H.264 (04/2017) E.2.1.296 *297 * Return: the color_primaries value for the passed colorspace298 */299static 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_func327 * @colorspace: the color space as &enum v4l2_colorspace328 * @xfer_func: the transfer function as &enum v4l2_xfer_func329 *330 * Convert the &enum v4l2_xfer_func to transfer_characteristics as specified in331 * Rec. ITU-T H.264 (04/2017) E.2.1.332 *333 * Return: the transfer_characteristics value for the passed transfer function334 */335static 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_encoding358 * @colorspace: the color space as &enum v4l2_colorspace359 * @ycbcr_encoding: the ycbcr encoding as &enum v4l2_ycbcr_encoding360 *361 * Convert the &enum v4l2_ycbcr_encoding to matrix_coefficients as specified in362 * Rec. ITU-T H.264 (04/2017) E.2.1.363 *364 * Return: the matrix_coefficients value for the passed encoding365 */366static 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 389ssize_t nal_h264_write_sps(const struct device *dev,390 void *dest, size_t n, struct nal_h264_sps *sps);391ssize_t nal_h264_read_sps(const struct device *dev,392 struct nal_h264_sps *sps, void *src, size_t n);393void nal_h264_print_sps(const struct device *dev, struct nal_h264_sps *sps);394 395ssize_t nal_h264_write_pps(const struct device *dev,396 void *dest, size_t n, struct nal_h264_pps *pps);397ssize_t nal_h264_read_pps(const struct device *dev,398 struct nal_h264_pps *pps, void *src, size_t n);399void nal_h264_print_pps(const struct device *dev, struct nal_h264_pps *pps);400 401ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n);402ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n);403 404#endif /* __NAL_H264_H__ */405