diff options
Diffstat (limited to 'drivers/media/platform/allegro-dvt/nal-h264.h')
| -rw-r--r-- | drivers/media/platform/allegro-dvt/nal-h264.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/media/platform/allegro-dvt/nal-h264.h b/drivers/media/platform/allegro-dvt/nal-h264.h new file mode 100644 index 000000000000..2ba7cbced7a5 --- /dev/null +++ b/drivers/media/platform/allegro-dvt/nal-h264.h @@ -0,0 +1,208 @@ +/* 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_hdr_parameters - HDR 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__ */ |