Struct H264SliceHeader 

pub struct H264SliceHeader {
    pub first_mb_in_slice: u32,
    pub slice_type: H264SliceType,
    pub pic_parameter_set_id: u8,
    pub is_idr: bool,
    pub frame_num: u32,
    pub field_pic_flag: bool,
    pub bottom_field_flag: bool,
    pub colour_plane_id: Option<u8>,
    pub idr_pic_id: Option<u32>,
    pub pic_order_cnt_lsb: Option<u32>,
    pub delta_pic_order_cnt_bottom: Option<i32>,
    pub delta_pic_order_cnt: [Option<i32>; 2],
}

Parsed H.264 slice header — just the fields the Vulkan Video decoder + our DPB manager need. See ITU-T H.264 §7.3.3. Full slice header has ref_pic_list_modification, weighted_prediction tables, dec_ref_pic_marking, etc., which we don’t consume (the driver re-derives them from the PPS + StdVideoDecodeH264PictureInfo flags).

Fields

first_mb_in_slice: u32

slice_type: H264SliceType

pic_parameter_set_id: u8

is_idr: bool

From the NAL header: nal_unit_type == 5 — set by the caller when it picks the NAL to parse. Affects whether idr_pic_id is carried.

frame_num: u32

field_pic_flag: bool

True when the slice encodes a single field of an interlaced frame (spec: !frame_mbs_only_flag && field_pic_flag). False for progressive frames or MBAFF pairs.

bottom_field_flag: bool

colour_plane_id: Option<u8>

idr_pic_id: Option<u32>

Set when is_idr; otherwise None.

pic_order_cnt_lsb: Option<u32>

Set when SPS pic_order_cnt_type == 0.

delta_pic_order_cnt_bottom: Option<i32>

delta_pic_order_cnt: [Option<i32>; 2]

Set when SPS pic_order_cnt_type == 1 and !delta_pic_order_always_zero_flag. [0] always present in that branch, [1] present only when the PPS carried bottom_field_pic_order_in_frame_present_flag and we’re in a frame (not field) slice.

Trait Implementations

impl Clone for H264SliceHeader

fn clone(&self) -> H264SliceHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for H264SliceHeader

impl Debug for H264SliceHeader

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

Formats the value using the given formatter.

impl Eq for H264SliceHeader

impl PartialEq for H264SliceHeader

fn eq(&self, other: &H264SliceHeader) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for H264SliceHeader