Struct Sps 

pub struct Sps {

    pub profile_idc: u8,
    pub level_idc: u8,
    pub seq_parameter_set_id: u32,
    pub log2_max_frame_num: u32,
    pub pic_order_cnt_type: u32,
    pub log2_max_pic_order_cnt_lsb: u32,
    pub delta_pic_order_always_zero: bool,
    pub gaps_in_frame_num_allowed: bool,
    pub direct_8x8_inference: bool,
    pub max_num_ref_frames: u32,
    pub pic_width_in_mbs: usize,
    pub pic_height_in_mbs: usize,
    pub frame_crop_left: u32,
    pub frame_crop_right: u32,
    pub frame_crop_top: u32,
    pub frame_crop_bottom: u32,
    pub chroma_format_idc: u32,
    pub scaling_4x4: [[u8; 16]; 6],
    pub scaling_8x8: [[u8; 64]; 2],
    pub has_scaling: bool,
}

Parsed sequence parameter set fields the decoder needs.

Fields

profile_idc: u8

level_idc: u8

seq_parameter_set_id: u32

log2_max_frame_num: u32

pic_order_cnt_type: u32

log2_max_pic_order_cnt_lsb: u32

delta_pic_order_always_zero: bool

delta_pic_order_always_zero_flag (only meaningful for POC type 1).

gaps_in_frame_num_allowed: bool

gaps_in_frame_num_value_allowed_flag: when set, frame_num may skip values and the decoder must synthesize placeholder reference frames.

direct_8x8_inference: bool

direct_8x8_inference_flag: when set, B direct/skip derives one motion per 8×8 from the co-located corner 4×4 (vs per-4×4).

max_num_ref_frames: u32

pic_width_in_mbs: usize

pic_height_in_mbs: usize

frame_crop_left: u32

frame_crop_right: u32

frame_crop_top: u32

frame_crop_bottom: u32

chroma_format_idc: u32

chroma_format_idc (1 = 4:2:0; the only value we decode).

scaling_4x4: [[u8; 16]; 6]

Sequence scaling lists in zig-zag order (six 4×4, two 8×8); 16 everywhere = flat (no weighting). High-profile only.

scaling_8x8: [[u8; 64]; 2]

has_scaling: bool

Whether custom scaling matrices are active (else flat dequant).

Implementations

impl Sps

pub fn coded_width(&self) -> usize

Coded luma width/height in samples (MB grid * 16).

pub fn coded_height(&self) -> usize

pub fn display_width(&self) -> usize

Displayed luma width after cropping (CropUnitX = 2 for 4:2:0).

pub fn display_height(&self) -> usize

Displayed luma height after cropping (CropUnitY = 2 for 4:2:0, frame-only).

pub fn parse(rbsp: &[u8]) -> Result<Self, DecodeError>

Parses an SPS RBSP (emulation bytes already removed). Rejects anything outside Constrained Baseline cleanly; never panics.

Trait Implementations

impl Clone for Sps

fn clone(&self) -> Sps

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Sps

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.