drivers/media/platform/allegro-dvt/nal-h264.h - linux - Git at Google

 /* 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/errno.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/v4l2-controls.h>
 #include <linux/videodev2.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;
 	};
 };

 /**
  * nal_h264_profile() - Get profile_idc for v4l2 h264 profile
  * @profile: the profile as &enum v4l2_mpeg_video_h264_profile
  *
  * Convert the &enum v4l2_mpeg_video_h264_profile to profile_idc as specified
  * in Rec. ITU-T H.264 (04/2017) A.2.
  *
  * Return: the profile_idc for the passed level
  */
 static inline int nal_h264_profile(enum v4l2_mpeg_video_h264_profile profile)
 {
 	switch (profile) {
 	case V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE:
 		return 66;
 	case V4L2_MPEG_VIDEO_H264_PROFILE_MAIN:
 		return 77;
 	case V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED:
 		return 88;
 	case V4L2_MPEG_VIDEO_H264_PROFILE_HIGH:
 		return 100;
 	default:
 		return -EINVAL;
 	}
 }

 /**
  * nal_h264_level() - Get level_idc for v4l2 h264 level
  * @level: the level as &enum v4l2_mpeg_video_h264_level
  *
  * Convert the &enum v4l2_mpeg_video_h264_level to level_idc as specified in
  * Rec. ITU-T H.264 (04/2017) A.3.2.
  *
  * Return: the level_idc for the passed level
  */
 static inline int nal_h264_level(enum v4l2_mpeg_video_h264_level level)
 {
 	switch (level) {
 	case V4L2_MPEG_VIDEO_H264_LEVEL_1_0:
 		return 10;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_1B:
 		return 9;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_1_1:
 		return 11;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_1_2:
 		return 12;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_1_3:
 		return 13;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_2_0:
 		return 20;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_2_1:
 		return 21;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_2_2:
 		return 22;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_3_0:
 		return 30;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_3_1:
 		return 31;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_3_2:
 		return 32;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_4_0:
 		return 40;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_4_1:
 		return 41;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_4_2:
 		return 42;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_5_0:
 		return 50;
 	case V4L2_MPEG_VIDEO_H264_LEVEL_5_1:
 		return 51;
 	default:
 		return -EINVAL;
 	}
 }

 /**
  * nal_h264_full_range() - Get video_full_range_flag for v4l2 quantization
  * @quantization: the quantization type as &enum v4l2_quantization
  *
  * Convert the &enum v4l2_quantization to video_full_range_flag as specified in
  * Rec. ITU-T H.264 (04/2017) E.2.1.
  *
  * Return: the video_full_range_flag value for the passed quantization
  */
 static inline int nal_h264_full_range(enum v4l2_quantization quantization)
 {
 	switch (quantization) {
 	case V4L2_QUANTIZATION_FULL_RANGE:
 		return 1;
 	case V4L2_QUANTIZATION_LIM_RANGE:
 		return 0;
 	default:
 		break;
 	}

 	return 0;
 }

 /**
  * nal_h264_color_primaries() - Get color_primaries for v4l2 colorspace
  * @colorspace: the color space as &enum v4l2_colorspace
  *
  * Convert the &enum v4l2_colorspace to color_primaries as specified in
  * Rec. ITU-T H.264 (04/2017) E.2.1.
  *
  * Return: the color_primaries value for the passed colorspace
  */
 static inline int nal_h264_color_primaries(enum v4l2_colorspace colorspace)
 {
 	switch (colorspace) {
 	case V4L2_COLORSPACE_SMPTE170M:
 		return 6;
 	case V4L2_COLORSPACE_SMPTE240M:
 		return 7;
 	case V4L2_COLORSPACE_REC709:
 		return 1;
 	case V4L2_COLORSPACE_470_SYSTEM_M:
 		return 4;
 	case V4L2_COLORSPACE_JPEG:
 	case V4L2_COLORSPACE_SRGB:
 	case V4L2_COLORSPACE_470_SYSTEM_BG:
 		return 5;
 	case V4L2_COLORSPACE_BT2020:
 		return 9;
 	case V4L2_COLORSPACE_DEFAULT:
 	case V4L2_COLORSPACE_OPRGB:
 	case V4L2_COLORSPACE_RAW:
 	case V4L2_COLORSPACE_DCI_P3:
 	default:
 		return 2;
 	}
 }

 /**
  * nal_h264_transfer_characteristics() - Get transfer_characteristics for v4l2 xfer_func
  * @colorspace: the color space as &enum v4l2_colorspace
  * @xfer_func: the transfer function as &enum v4l2_xfer_func
  *
  * Convert the &enum v4l2_xfer_func to transfer_characteristics as specified in
  * Rec. ITU-T H.264 (04/2017) E.2.1.
  *
  * Return: the transfer_characteristics value for the passed transfer function
  */
 static inline int nal_h264_transfer_characteristics(enum v4l2_colorspace colorspace,
 						    enum v4l2_xfer_func xfer_func)
 {
 	if (xfer_func == V4L2_XFER_FUNC_DEFAULT)
 		xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(colorspace);

 	switch (xfer_func) {
 	case V4L2_XFER_FUNC_709:
 		return 6;
 	case V4L2_XFER_FUNC_SMPTE2084:
 		return 16;
 	case V4L2_XFER_FUNC_SRGB:
 	case V4L2_XFER_FUNC_OPRGB:
 	case V4L2_XFER_FUNC_NONE:
 	case V4L2_XFER_FUNC_DCI_P3:
 	case V4L2_XFER_FUNC_SMPTE240M:
 	default:
 		return 2;
 	}
 }

 /**
  * nal_h264_matrix_coeffs() - Get matrix_coefficients for v4l2 v4l2_ycbcr_encoding
  * @colorspace: the color space as &enum v4l2_colorspace
  * @ycbcr_encoding: the ycbcr encoding as &enum v4l2_ycbcr_encoding
  *
  * Convert the &enum v4l2_ycbcr_encoding to matrix_coefficients as specified in
  * Rec. ITU-T H.264 (04/2017) E.2.1.
  *
  * Return: the matrix_coefficients value for the passed encoding
  */
 static inline int nal_h264_matrix_coeffs(enum v4l2_colorspace colorspace,
 					 enum v4l2_ycbcr_encoding ycbcr_encoding)
 {
 	if (ycbcr_encoding == V4L2_YCBCR_ENC_DEFAULT)
 		ycbcr_encoding = V4L2_MAP_YCBCR_ENC_DEFAULT(colorspace);

 	switch (ycbcr_encoding) {
 	case V4L2_YCBCR_ENC_601:
 	case V4L2_YCBCR_ENC_XV601:
 		return 5;
 	case V4L2_YCBCR_ENC_709:
 	case V4L2_YCBCR_ENC_XV709:
 		return 1;
 	case V4L2_YCBCR_ENC_BT2020:
 		return 9;
 	case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
 		return 10;
 	case V4L2_YCBCR_ENC_SMPTE240M:
 	default:
 		return 2;
 	}
 }

 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__ */
	/* 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/errno.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/v4l2-controls.h>
	#include <linux/videodev2.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;
	};
	};

	/**
	* nal_h264_profile() - Get profile_idc for v4l2 h264 profile
	* @profile: the profile as &enum v4l2_mpeg_video_h264_profile
	*
	* Convert the &enum v4l2_mpeg_video_h264_profile to profile_idc as specified
	* in Rec. ITU-T H.264 (04/2017) A.2.
	*
	* Return: the profile_idc for the passed level
	*/
	static inline int nal_h264_profile(enum v4l2_mpeg_video_h264_profile profile)
	{
	switch (profile) {
	case V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE:
	return 66;
	case V4L2_MPEG_VIDEO_H264_PROFILE_MAIN:
	return 77;
	case V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED:
	return 88;
	case V4L2_MPEG_VIDEO_H264_PROFILE_HIGH:
	return 100;
	default:
	return -EINVAL;
	}
	}

	/**
	* nal_h264_level() - Get level_idc for v4l2 h264 level
	* @level: the level as &enum v4l2_mpeg_video_h264_level
	*
	* Convert the &enum v4l2_mpeg_video_h264_level to level_idc as specified in
	* Rec. ITU-T H.264 (04/2017) A.3.2.
	*
	* Return: the level_idc for the passed level
	*/
	static inline int nal_h264_level(enum v4l2_mpeg_video_h264_level level)
	{
	switch (level) {
	case V4L2_MPEG_VIDEO_H264_LEVEL_1_0:
	return 10;
	case V4L2_MPEG_VIDEO_H264_LEVEL_1B:
	return 9;
	case V4L2_MPEG_VIDEO_H264_LEVEL_1_1:
	return 11;
	case V4L2_MPEG_VIDEO_H264_LEVEL_1_2:
	return 12;
	case V4L2_MPEG_VIDEO_H264_LEVEL_1_3:
	return 13;
	case V4L2_MPEG_VIDEO_H264_LEVEL_2_0:
	return 20;
	case V4L2_MPEG_VIDEO_H264_LEVEL_2_1:
	return 21;
	case V4L2_MPEG_VIDEO_H264_LEVEL_2_2:
	return 22;
	case V4L2_MPEG_VIDEO_H264_LEVEL_3_0:
	return 30;
	case V4L2_MPEG_VIDEO_H264_LEVEL_3_1:
	return 31;
	case V4L2_MPEG_VIDEO_H264_LEVEL_3_2:
	return 32;
	case V4L2_MPEG_VIDEO_H264_LEVEL_4_0:
	return 40;
	case V4L2_MPEG_VIDEO_H264_LEVEL_4_1:
	return 41;
	case V4L2_MPEG_VIDEO_H264_LEVEL_4_2:
	return 42;
	case V4L2_MPEG_VIDEO_H264_LEVEL_5_0:
	return 50;
	case V4L2_MPEG_VIDEO_H264_LEVEL_5_1:
	return 51;
	default:
	return -EINVAL;
	}
	}

	/**
	* nal_h264_full_range() - Get video_full_range_flag for v4l2 quantization
	* @quantization: the quantization type as &enum v4l2_quantization
	*
	* Convert the &enum v4l2_quantization to video_full_range_flag as specified in
	* Rec. ITU-T H.264 (04/2017) E.2.1.
	*
	* Return: the video_full_range_flag value for the passed quantization
	*/
	static inline int nal_h264_full_range(enum v4l2_quantization quantization)
	{
	switch (quantization) {
	case V4L2_QUANTIZATION_FULL_RANGE:
	return 1;
	case V4L2_QUANTIZATION_LIM_RANGE:
	return 0;
	default:
	break;
	}

	return 0;
	}

	/**
	* nal_h264_color_primaries() - Get color_primaries for v4l2 colorspace
	* @colorspace: the color space as &enum v4l2_colorspace
	*
	* Convert the &enum v4l2_colorspace to color_primaries as specified in
	* Rec. ITU-T H.264 (04/2017) E.2.1.
	*
	* Return: the color_primaries value for the passed colorspace
	*/
	static inline int nal_h264_color_primaries(enum v4l2_colorspace colorspace)
	{
	switch (colorspace) {
	case V4L2_COLORSPACE_SMPTE170M:
	return 6;
	case V4L2_COLORSPACE_SMPTE240M:
	return 7;
	case V4L2_COLORSPACE_REC709:
	return 1;
	case V4L2_COLORSPACE_470_SYSTEM_M:
	return 4;
	case V4L2_COLORSPACE_JPEG:
	case V4L2_COLORSPACE_SRGB:
	case V4L2_COLORSPACE_470_SYSTEM_BG:
	return 5;
	case V4L2_COLORSPACE_BT2020:
	return 9;
	case V4L2_COLORSPACE_DEFAULT:
	case V4L2_COLORSPACE_OPRGB:
	case V4L2_COLORSPACE_RAW:
	case V4L2_COLORSPACE_DCI_P3:
	default:
	return 2;
	}
	}

	/**
	* nal_h264_transfer_characteristics() - Get transfer_characteristics for v4l2 xfer_func
	* @colorspace: the color space as &enum v4l2_colorspace
	* @xfer_func: the transfer function as &enum v4l2_xfer_func
	*
	* Convert the &enum v4l2_xfer_func to transfer_characteristics as specified in
	* Rec. ITU-T H.264 (04/2017) E.2.1.
	*
	* Return: the transfer_characteristics value for the passed transfer function
	*/
	static inline int nal_h264_transfer_characteristics(enum v4l2_colorspace colorspace,
	enum v4l2_xfer_func xfer_func)
	{
	if (xfer_func == V4L2_XFER_FUNC_DEFAULT)
	xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(colorspace);

	switch (xfer_func) {
	case V4L2_XFER_FUNC_709:
	return 6;
	case V4L2_XFER_FUNC_SMPTE2084:
	return 16;
	case V4L2_XFER_FUNC_SRGB:
	case V4L2_XFER_FUNC_OPRGB:
	case V4L2_XFER_FUNC_NONE:
	case V4L2_XFER_FUNC_DCI_P3:
	case V4L2_XFER_FUNC_SMPTE240M:
	default:
	return 2;
	}
	}

	/**
	* nal_h264_matrix_coeffs() - Get matrix_coefficients for v4l2 v4l2_ycbcr_encoding
	* @colorspace: the color space as &enum v4l2_colorspace
	* @ycbcr_encoding: the ycbcr encoding as &enum v4l2_ycbcr_encoding
	*
	* Convert the &enum v4l2_ycbcr_encoding to matrix_coefficients as specified in
	* Rec. ITU-T H.264 (04/2017) E.2.1.
	*
	* Return: the matrix_coefficients value for the passed encoding
	*/
	static inline int nal_h264_matrix_coeffs(enum v4l2_colorspace colorspace,
	enum v4l2_ycbcr_encoding ycbcr_encoding)
	{
	if (ycbcr_encoding == V4L2_YCBCR_ENC_DEFAULT)
	ycbcr_encoding = V4L2_MAP_YCBCR_ENC_DEFAULT(colorspace);

	switch (ycbcr_encoding) {
	case V4L2_YCBCR_ENC_601:
	case V4L2_YCBCR_ENC_XV601:
	return 5;
	case V4L2_YCBCR_ENC_709:
	case V4L2_YCBCR_ENC_XV709:
	return 1;
	case V4L2_YCBCR_ENC_BT2020:
	return 9;
	case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
	return 10;
	case V4L2_YCBCR_ENC_SMPTE240M:
	default:
	return 2;
	}
	}

	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__ */