Struct cros_codecs::decoders::h264::parser::Sps

source · [−]

pub struct Sps {Show 48 fields
    seq_parameter_set_id: u8,
    profile_idc: u8,
    constraint_set0_flag: bool,
    constraint_set1_flag: bool,
    constraint_set2_flag: bool,
    constraint_set3_flag: bool,
    constraint_set4_flag: bool,
    constraint_set5_flag: bool,
    level_idc: Level,
    chroma_format_idc: u8,
    separate_colour_plane_flag: bool,
    bit_depth_luma_minus8: u8,
    bit_depth_chroma_minus8: u8,
    qpprime_y_zero_transform_bypass_flag: bool,
    seq_scaling_matrix_present_flag: bool,
    scaling_lists_4x4: [[u8; 16]; 6],
    scaling_lists_8x8: [[u8; 64]; 6],
    log2_max_frame_num_minus4: u8,
    pic_order_cnt_type: u8,
    log2_max_pic_order_cnt_lsb_minus4: u8,
    delta_pic_order_always_zero_flag: bool,
    offset_for_non_ref_pic: i32,
    offset_for_top_to_bottom_field: i32,
    num_ref_frames_in_pic_order_cnt_cycle: u8,
    offset_for_ref_frame: [i32; 255],
    max_num_ref_frames: u32,
    gaps_in_frame_num_value_allowed_flag: bool,
    pic_width_in_mbs_minus1: u32,
    pic_height_in_map_units_minus1: u32,
    frame_mbs_only_flag: bool,
    mb_adaptive_frame_field_flag: bool,
    direct_8x8_inference_flag: bool,
    frame_cropping_flag: bool,
    frame_crop_left_offset: u32,
    frame_crop_right_offset: u32,
    frame_crop_top_offset: u32,
    frame_crop_bottom_offset: u32,
    chroma_array_type: u8,
    max_frame_num: u32,
    width: u32,
    height: u32,
    crop_rect_width: u32,
    crop_rect_height: u32,
    crop_rect_x: u32,
    crop_rect_y: u32,
    expected_delta_per_pic_order_cnt_cycle: i32,
    vui_parameters_present_flag: bool,
    vui_parameters: VuiParams,
}

Expand description

A H264 Sequence Parameter Set. A syntax structure containing syntax elements that apply to zero or more entire coded video sequences as determined by the content of a seq_parameter_set_id syntax element found in the picture parameter set referred to by the pic_parameter_set_id syntax element found in each slice header.

Fields

seq_parameter_set_id: u8

Identifies the sequence parameter set that is referred to by the picture parameter set

profile_idc: u8

Profile to which the coded video sequence conforms

constraint_set0_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

constraint_set1_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

constraint_set2_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

constraint_set3_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

constraint_set4_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

constraint_set5_flag: bool

Retains the same meaning as in the specification. See 7.4.2.1.1

level_idc: Level

Level to which the coded video sequence conforms

chroma_format_idc: u8

Specifies the chroma sampling relative to the luma sampling as specified in clause 6.2.

separate_colour_plane_flag: bool

Specifies whether the three colour components of the 4:4:4 chroma format are coded separately.

bit_depth_luma_minus8: u8

Specifies the bit depth of the samples of the luma array and the value of the luma quantization parameter range offset QpBdOffsetY. See 7-3 and 7-4.

bit_depth_chroma_minus8: u8

Specifies the bit depth of the samples of the chroma arrays and the value of the chroma quantization parameter range offset QpBdOffsetC. See 7-5 and 7-6.

qpprime_y_zero_transform_bypass_flag: bool

qpprime_y_zero_transform_bypass_flag equal to 1 specifies that, when QP′Y is equal to 0, a transform bypass operation for the transform coefficient decoding process and picture construction process prior to deblocking filter process as specified in clause 8.5 shall be applied. qpprime_y_zero_transform_bypass_flag equal to 0 specifies that the transform coefficient decoding process and picture construction process prior to deblocking filter process shall not use the transform bypass operation QP′Y is defined in 7-38 as QP′Y = QPY + QpBdOffsetY

seq_scaling_matrix_present_flag: bool

Whether seq_scaling_list_present_flag[i] for i = 0..7 or i = 0..11 is present or whether the sequence level scaling list shall be specified by Flat_4x4_16 for i = 0..5 and flat_8x8_16 for i = 6..11

scaling_lists_4x4: [[u8; 16]; 6]

4x4 Scaling list as read with 7.3.2.1.1.1

scaling_lists_8x8: [[u8; 64]; 6]

8x8 Scaling list as read with 7.3.2.1.1.1

log2_max_frame_num_minus4: u8

Specifies the value of the variable MaxFrameNum that is used in frame_num related derivations as follows: MaxFrameNum = 2 ^ (log2_max_frame_num_minus4 + 4 )

pic_order_cnt_type: u8

Specifies the method to decode picture order count (as specified in clause 8.2.1)

log2_max_pic_order_cnt_lsb_minus4: u8

Specifies the value of the variable MaxPicOrderCntLsb that is used in the decoding process for picture order count as specified in clause 8.2.1 as follows: MaxPicOrderCntLsb = 2 ^ ( log2_max_pic_order_cnt_lsb_minus4 + 4 ).

delta_pic_order_always_zero_flag: bool

If true, specifies that delta_pic_order_cnt[0] and delta_pic_order_cnt[1] are not present in the slice headers of the sequence and shall be inferred to be equal to 0. If false, specifies that delta_pic_order_cnt[0] is present in the slice headers of the sequence and delta_pic_order_cnt[1] may be present in the slice headers of the sequence.

offset_for_non_ref_pic: i32

Used to calculate the picture order count of a non-reference picture as specified in clause 8.2.1.

offset_for_top_to_bottom_field: i32

Used to calculate the picture order count of a bottom field as specified in clause 8.2.1.

num_ref_frames_in_pic_order_cnt_cycle: u8

Used in the decoding process for picture order count as specified in clause 8.2.1

offset_for_ref_frame: [i32; 255]

An element of a list of num_ref_frames_in_pic_order_cnt_cycle values used in the decoding process for picture order count as specified in clause 8.2.

max_num_ref_frames: u32

Specifies the maximum number of short-term and long-term reference frames, complementary reference field pairs, and non-paired reference fields that may be used by the decoding process for inter prediction of any picture in the coded video sequence. Also determines the size of the sliding window operation as specified in clause 8.2.5.3.

gaps_in_frame_num_value_allowed_flag: bool

Specifies the allowed values of frame_num as specified in clause 7.4.3 and the decoding process in case of an inferred gap between values of frame_num as specified in clause 8.2.5.2

pic_width_in_mbs_minus1: u32

Plus 1 specifies the width of each decoded picture in units of macroblocks.

pic_height_in_map_units_minus1: u32

Plus 1 specifies the height in slice group map units of a decoded frame or field.

frame_mbs_only_flag: bool

If true, specifies that every coded picture of the coded video sequence is a coded frame containing only frame macroblocks, else specifies that coded pictures of the coded video sequence may either be coded fields or coded frames.

mb_adaptive_frame_field_flag: bool

If true, specifies the possible use of switching between frame and field macroblocks within frames, else, specifies no switching between frame and field macroblocks within a picture.

direct_8x8_inference_flag: bool

Specifies the method used in the derivation process for luma motion vectors for B_Skip, B_Direct_16x16 and B_Direct_8x8 as specified in clause 8.4.1.2.

frame_cropping_flag: bool

If true, specifies that the frame cropping offset parameters follow next in the sequence parameter, else specifies that the frame cropping offset parameters are not present

frame_crop_left_offset: u32

Specify the samples of the pictures in the coded video sequence that are output from the decoding process, in terms of a rectangular region specified in frame coordinates for output.

frame_crop_right_offset: u32

Specify the samples of the pictures in the coded video sequence that are output from the decoding process, in terms of a rectangular region specified in frame coordinates for output.

frame_crop_top_offset: u32

Specify the samples of the pictures in the coded video sequence that are output from the decoding process, in terms of a rectangular region specified in frame coordinates for output.

frame_crop_bottom_offset: u32

Specify the samples of the pictures in the coded video sequence that are output from the decoding process, in terms of a rectangular region specified in frame coordinates for output.

chroma_array_type: u8

Same as ChromaArrayType. See the definition in the specification.

max_frame_num: u32

Same as MaxFrameNum. See 7-10 in the specification.

width: u32

See 7-13 through 7-17 in the specification.

height: u32

See 7-13 through 7-17 in the specification.

crop_rect_width: u32

See the documentation for frame_crop_{left|right|top|bottom}_offset in the specification

crop_rect_height: u32

See the documentation for frame_crop_{left|right|top|bottom}_offset in the specification

crop_rect_x: u32

See the documentation for frame_crop_{left|right|top|bottom}_offset in the specification

crop_rect_y: u32

See the documentation for frame_crop_{left|right|top|bottom}_offset in the specification

expected_delta_per_pic_order_cnt_cycle: i32

Same as ExpectedDeltaPerPicOrderCntCycle, see 7-12 in the specification.

vui_parameters_present_flag: boolvui_parameters: VuiParams

Implementations

impl Sps

pub fn seq_parameter_set_id(&self) -> u8

pub fn profile_idc(&self) -> u8

pub fn constraint_set0_flag(&self) -> bool

pub fn constraint_set1_flag(&self) -> bool

pub fn constraint_set2_flag(&self) -> bool

pub fn constraint_set3_flag(&self) -> bool

pub fn constraint_set4_flag(&self) -> bool

pub fn constraint_set5_flag(&self) -> bool

pub fn level_idc(&self) -> Level

pub fn chroma_format_idc(&self) -> u8

pub fn separate_colour_plane_flag(&self) -> bool

pub fn bit_depth_luma_minus8(&self) -> u8

pub fn bit_depth_chroma_minus8(&self) -> u8

pub fn qpprime_y_zero_transform_bypass_flag(&self) -> bool

pub fn seq_scaling_matrix_present_flag(&self) -> bool

pub fn scaling_lists_4x4(&self) -> [[u8 ; 16]; 6]

pub fn scaling_lists_8x8(&self) -> [[u8 ; 64]; 6]

pub fn log2_max_frame_num_minus4(&self) -> u8

pub fn pic_order_cnt_type(&self) -> u8

pub fn log2_max_pic_order_cnt_lsb_minus4(&self) -> u8

pub fn delta_pic_order_always_zero_flag(&self) -> bool

pub fn offset_for_non_ref_pic(&self) -> i32

pub fn offset_for_top_to_bottom_field(&self) -> i32

pub fn num_ref_frames_in_pic_order_cnt_cycle(&self) -> u8

pub fn offset_for_ref_frame(&self) -> [i32 ; 255]

pub fn max_num_ref_frames(&self) -> u32

pub fn gaps_in_frame_num_value_allowed_flag(&self) -> bool

pub fn pic_width_in_mbs_minus1(&self) -> u32

pub fn pic_height_in_map_units_minus1(&self) -> u32

pub fn frame_mbs_only_flag(&self) -> bool

pub fn mb_adaptive_frame_field_flag(&self) -> bool

pub fn direct_8x8_inference_flag(&self) -> bool

pub fn frame_cropping_flag(&self) -> bool

pub fn frame_crop_left_offset(&self) -> u32

pub fn frame_crop_right_offset(&self) -> u32

pub fn frame_crop_top_offset(&self) -> u32

pub fn frame_crop_bottom_offset(&self) -> u32

pub fn chroma_array_type(&self) -> u8

pub fn max_frame_num(&self) -> u32

pub fn width(&self) -> u32

pub fn height(&self) -> u32

pub fn crop_rect_width(&self) -> u32

pub fn crop_rect_height(&self) -> u32

pub fn crop_rect_x(&self) -> u32

pub fn crop_rect_y(&self) -> u32

pub fn expected_delta_per_pic_order_cnt_cycle(&self) -> i32

pub fn vui_parameters_present_flag(&self) -> bool

pub fn vui_parameters(&self) -> &VuiParams

pub fn visible_rectangle(&self) -> Rect<u32>

pub fn max_dpb_frames(&self) -> Result<usize>

Trait Implementations

impl Clone for Sps

fn clone(&self) -> Sps

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for Sps

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

Formats the value using the given formatter. Read more

impl Default for Sps

fn default() -> Self

Returns the “default value” for a type. Read more

impl PartialEq<Sps> for Sps

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

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

impl StreamInfo for &Sps

fn va_profile(&self) -> Result<i32>

Returns the VA profile of the stream.

fn rt_format(&self) -> Result<u32>

Returns the RT format of the stream.

fn min_num_surfaces(&self) -> usize

Returns the minimum number of surfaces required to decode the stream.

fn coded_size(&self) -> (u32, u32)

Returns the coded size of the surfaces required to decode the stream.

fn visible_rect(&self) -> ((u32, u32), (u32, u32))

Returns the visible rectangle within the coded size for the stream.

impl Eq for Sps

impl StructuralEq for Sps

impl StructuralPartialEq for Sps

Auto Trait Implementations

impl RefUnwindSafe for Sps

impl Send for Sps

impl Sync for Sps

impl Unpin for Sps

impl UnwindSafe for Sps

Blanket Implementations

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for Twhere
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.