| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2019 Pengutronix, Michael Tretter <kernel@pengutronix.de> |
| * |
| * Convert NAL units between raw byte sequence payloads (RBSP) and C structs. |
| */ |
| |
| #ifndef __NAL_H264_H__ |
| #define __NAL_H264_H__ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| |
| /* |
| * struct nal_h264_hrd_parameters - HRD parameters |
| * |
| * C struct representation of the sequence parameter set NAL unit as defined by |
| * Rec. ITU-T H.264 (04/2017) E.1.2 HRD parameters syntax. |
| */ |
| struct nal_h264_hrd_parameters { |
| unsigned int cpb_cnt_minus1; |
| unsigned int bit_rate_scale; |
| unsigned int cpb_size_scale; |
| struct { |
| int bit_rate_value_minus1[16]; |
| int cpb_size_value_minus1[16]; |
| unsigned int cbr_flag[16]; |
| }; |
| unsigned int initial_cpb_removal_delay_length_minus1; |
| unsigned int cpb_removal_delay_length_minus1; |
| unsigned int dpb_output_delay_length_minus1; |
| unsigned int time_offset_length; |
| }; |
| |
| /* |
| * struct nal_h264_vui_parameters - VUI parameters |
| * |
| * C struct representation of the VUI parameters as defined by Rec. ITU-T |
| * H.264 (04/2017) E.1.1 VUI parameters syntax. |
| */ |
| struct nal_h264_vui_parameters { |
| unsigned int aspect_ratio_info_present_flag; |
| struct { |
| unsigned int aspect_ratio_idc; |
| unsigned int sar_width; |
| unsigned int sar_height; |
| }; |
| unsigned int overscan_info_present_flag; |
| unsigned int overscan_appropriate_flag; |
| unsigned int video_signal_type_present_flag; |
| struct { |
| unsigned int video_format; |
| unsigned int video_full_range_flag; |
| unsigned int colour_description_present_flag; |
| struct { |
| unsigned int colour_primaries; |
| unsigned int transfer_characteristics; |
| unsigned int matrix_coefficients; |
| }; |
| }; |
| unsigned int chroma_loc_info_present_flag; |
| struct { |
| unsigned int chroma_sample_loc_type_top_field; |
| unsigned int chroma_sample_loc_type_bottom_field; |
| }; |
| unsigned int timing_info_present_flag; |
| struct { |
| unsigned int num_units_in_tick; |
| unsigned int time_scale; |
| unsigned int fixed_frame_rate_flag; |
| }; |
| unsigned int nal_hrd_parameters_present_flag; |
| struct nal_h264_hrd_parameters nal_hrd_parameters; |
| unsigned int vcl_hrd_parameters_present_flag; |
| struct nal_h264_hrd_parameters vcl_hrd_parameters; |
| unsigned int low_delay_hrd_flag; |
| unsigned int pic_struct_present_flag; |
| unsigned int bitstream_restriction_flag; |
| struct { |
| unsigned int motion_vectors_over_pic_boundaries_flag; |
| unsigned int max_bytes_per_pic_denom; |
| unsigned int max_bits_per_mb_denom; |
| unsigned int log2_max_mv_length_horizontal; |
| unsigned int log21_max_mv_length_vertical; |
| unsigned int max_num_reorder_frames; |
| unsigned int max_dec_frame_buffering; |
| }; |
| }; |
| |
| /* |
| * struct nal_h264_sps - Sequence parameter set |
| * |
| * C struct representation of the sequence parameter set NAL unit as defined by |
| * Rec. ITU-T H.264 (04/2017) 7.3.2.1.1 Sequence parameter set data syntax. |
| */ |
| struct nal_h264_sps { |
| unsigned int profile_idc; |
| unsigned int constraint_set0_flag; |
| unsigned int constraint_set1_flag; |
| unsigned int constraint_set2_flag; |
| unsigned int constraint_set3_flag; |
| unsigned int constraint_set4_flag; |
| unsigned int constraint_set5_flag; |
| unsigned int reserved_zero_2bits; |
| unsigned int level_idc; |
| unsigned int seq_parameter_set_id; |
| struct { |
| unsigned int chroma_format_idc; |
| unsigned int separate_colour_plane_flag; |
| unsigned int bit_depth_luma_minus8; |
| unsigned int bit_depth_chroma_minus8; |
| unsigned int qpprime_y_zero_transform_bypass_flag; |
| unsigned int seq_scaling_matrix_present_flag; |
| }; |
| unsigned int log2_max_frame_num_minus4; |
| unsigned int pic_order_cnt_type; |
| union { |
| unsigned int log2_max_pic_order_cnt_lsb_minus4; |
| struct { |
| unsigned int delta_pic_order_always_zero_flag; |
| int offset_for_non_ref_pic; |
| int offset_for_top_to_bottom_field; |
| unsigned int num_ref_frames_in_pic_order_cnt_cycle; |
| int offset_for_ref_frame[255]; |
| }; |
| }; |
| unsigned int max_num_ref_frames; |
| unsigned int gaps_in_frame_num_value_allowed_flag; |
| unsigned int pic_width_in_mbs_minus1; |
| unsigned int pic_height_in_map_units_minus1; |
| unsigned int frame_mbs_only_flag; |
| unsigned int mb_adaptive_frame_field_flag; |
| unsigned int direct_8x8_inference_flag; |
| unsigned int frame_cropping_flag; |
| struct { |
| unsigned int crop_left; |
| unsigned int crop_right; |
| unsigned int crop_top; |
| unsigned int crop_bottom; |
| }; |
| unsigned int vui_parameters_present_flag; |
| struct nal_h264_vui_parameters vui; |
| }; |
| |
| /* |
| * struct nal_h264_pps - Picture parameter set |
| * |
| * C struct representation of the picture parameter set NAL unit as defined by |
| * Rec. ITU-T H.264 (04/2017) 7.3.2.2 Picture parameter set RBSP syntax. |
| */ |
| struct nal_h264_pps { |
| unsigned int pic_parameter_set_id; |
| unsigned int seq_parameter_set_id; |
| unsigned int entropy_coding_mode_flag; |
| unsigned int bottom_field_pic_order_in_frame_present_flag; |
| unsigned int num_slice_groups_minus1; |
| unsigned int slice_group_map_type; |
| union { |
| unsigned int run_length_minus1[8]; |
| struct { |
| unsigned int top_left[8]; |
| unsigned int bottom_right[8]; |
| }; |
| struct { |
| unsigned int slice_group_change_direction_flag; |
| unsigned int slice_group_change_rate_minus1; |
| }; |
| struct { |
| unsigned int pic_size_in_map_units_minus1; |
| unsigned int slice_group_id[8]; |
| }; |
| }; |
| unsigned int num_ref_idx_l0_default_active_minus1; |
| unsigned int num_ref_idx_l1_default_active_minus1; |
| unsigned int weighted_pred_flag; |
| unsigned int weighted_bipred_idc; |
| int pic_init_qp_minus26; |
| int pic_init_qs_minus26; |
| int chroma_qp_index_offset; |
| unsigned int deblocking_filter_control_present_flag; |
| unsigned int constrained_intra_pred_flag; |
| unsigned int redundant_pic_cnt_present_flag; |
| struct { |
| unsigned int transform_8x8_mode_flag; |
| unsigned int pic_scaling_matrix_present_flag; |
| int second_chroma_qp_index_offset; |
| }; |
| }; |
| |
| int nal_h264_profile_from_v4l2(enum v4l2_mpeg_video_h264_profile profile); |
| int nal_h264_level_from_v4l2(enum v4l2_mpeg_video_h264_level level); |
| |
| ssize_t nal_h264_write_sps(const struct device *dev, |
| void *dest, size_t n, struct nal_h264_sps *sps); |
| ssize_t nal_h264_read_sps(const struct device *dev, |
| struct nal_h264_sps *sps, void *src, size_t n); |
| void nal_h264_print_sps(const struct device *dev, struct nal_h264_sps *sps); |
| |
| ssize_t nal_h264_write_pps(const struct device *dev, |
| void *dest, size_t n, struct nal_h264_pps *pps); |
| ssize_t nal_h264_read_pps(const struct device *dev, |
| struct nal_h264_pps *pps, void *src, size_t n); |
| void nal_h264_print_pps(const struct device *dev, struct nal_h264_pps *pps); |
| |
| ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n); |
| ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n); |
| |
| #endif /* __NAL_H264_H__ */ |
