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

Source file repositories/reference/linux-study-clean/drivers/media/platform/allegro-dvt/nal-h264.h

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/allegro-dvt/nal-h264.h
Extension
.h
Size
11785 bytes
Lines
405
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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;

Annotation

Implementation Notes