Struct QuantizationParams

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pub struct QuantizationParams {
    pub base_q_idx: u8,
    pub delta_q_y_dc: i8,
    pub delta_q_u_dc: i8,
    pub delta_q_u_ac: i8,
    pub delta_q_v_dc: i8,
    pub delta_q_v_ac: i8,
    pub using_qmatrix: bool,
    pub qm_y: u8,
    pub qm_u: u8,
    pub qm_v: u8,
    pub delta_q_present: bool,
    pub delta_q_res: u8,
}

Expand description

Quantization parameters as parsed from the frame header.

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§base_q_idx: u8

Base quantizer index (0-255).

§delta_q_y_dc: i8

Delta Q for Y DC coefficients.

§delta_q_u_dc: i8

Delta Q for U DC coefficients.

§delta_q_u_ac: i8

Delta Q for U AC coefficients.

§delta_q_v_dc: i8

Delta Q for V DC coefficients.

§delta_q_v_ac: i8

Delta Q for V AC coefficients.

§using_qmatrix: bool

Use quantization matrices.

§qm_y: u8

QM level for Y plane.

§qm_u: u8

QM level for U plane.

§qm_v: u8

QM level for V plane.

§delta_q_present: bool

Delta Q present in block level.

§delta_q_res: u8

Delta Q resolution (log2).

Implementations§

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impl QuantizationParams

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pub fn new() -> Self

Create new quantization parameters with default values.

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pub fn parse( reader: &mut BitReader<'_>, seq: &SequenceHeader, ) -> CodecResult<Self>

Parse quantization parameters from the bitstream.

§Errors

Returns error if the bitstream is malformed.

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pub fn y_dc_qindex(&self) -> u8

Get the effective Q index for Y DC.

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pub const fn y_ac_qindex(&self) -> u8

Get the effective Q index for Y AC (same as base).

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pub fn u_dc_qindex(&self) -> u8

Get the effective Q index for U DC.

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pub fn u_ac_qindex(&self) -> u8

Get the effective Q index for U AC.

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pub fn v_dc_qindex(&self) -> u8

Get the effective Q index for V DC.

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pub fn v_ac_qindex(&self) -> u8

Get the effective Q index for V AC.

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pub fn get_y_dc_dequant(&self, bit_depth: u8) -> i16

Get the DC dequantizer for Y plane.

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pub fn get_y_ac_dequant(&self, bit_depth: u8) -> i16

Get the AC dequantizer for Y plane.

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pub fn get_u_dc_dequant(&self, bit_depth: u8) -> i16

Get the DC dequantizer for U plane.

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pub fn get_u_ac_dequant(&self, bit_depth: u8) -> i16

Get the AC dequantizer for U plane.

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pub fn get_v_dc_dequant(&self, bit_depth: u8) -> i16

Get the DC dequantizer for V plane.

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pub fn get_v_ac_dequant(&self, bit_depth: u8) -> i16

Get the AC dequantizer for V plane.

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pub fn is_lossless(&self) -> bool

Check if lossless mode is enabled.

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pub fn has_uv_delta(&self) -> bool

Check if any UV delta is non-zero.

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pub const fn get_qm_level(&self, plane: usize) -> u8

Get the QM level for a plane.

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pub fn get_dc_quant(&self, plane: usize, bit_depth: u8) -> i16

Get DC quantizer for a plane (generic method).

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pub fn get_ac_quant(&self, plane: usize, bit_depth: u8) -> i16

Get AC quantizer for a plane (generic method).

Trait Implementations§

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impl Clone for QuantizationParams

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fn clone(&self) -> QuantizationParams

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for QuantizationParams

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

Formats the value using the given formatter. Read more

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impl Default for QuantizationParams

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fn default() -> QuantizationParams

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

Auto Trait Implementations§

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impl UnwindSafe for QuantizationParams

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.

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type Init = T

The type for initializers.

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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

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

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

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

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

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type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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type Error = >::Error

The type returned in the event of a conversion error.

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

Performs the conversion.

Struct QuantizationParams Copy item path

Fields§

Implementations§

impl QuantizationParams

pub fn new() -> Self

pub fn parse( reader: &mut BitReader<'_>, seq: &SequenceHeader, ) -> CodecResult<Self>

§Errors

pub fn y_dc_qindex(&self) -> u8

pub const fn y_ac_qindex(&self) -> u8

pub fn u_dc_qindex(&self) -> u8

pub fn u_ac_qindex(&self) -> u8

pub fn v_dc_qindex(&self) -> u8

pub fn v_ac_qindex(&self) -> u8

pub fn get_y_dc_dequant(&self, bit_depth: u8) -> i16

pub fn get_y_ac_dequant(&self, bit_depth: u8) -> i16

pub fn get_u_dc_dequant(&self, bit_depth: u8) -> i16

pub fn get_u_ac_dequant(&self, bit_depth: u8) -> i16

pub fn get_v_dc_dequant(&self, bit_depth: u8) -> i16

pub fn get_v_ac_dequant(&self, bit_depth: u8) -> i16

pub fn is_lossless(&self) -> bool

pub fn has_uv_delta(&self) -> bool

pub const fn get_qm_level(&self, plane: usize) -> u8

pub fn get_dc_quant(&self, plane: usize, bit_depth: u8) -> i16

pub fn get_ac_quant(&self, plane: usize, bit_depth: u8) -> i16

Trait Implementations§

impl Clone for QuantizationParams

fn clone(&self) -> QuantizationParams

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

impl Debug for QuantizationParams

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

impl Default for QuantizationParams

fn default() -> QuantizationParams

Auto Trait Implementations§

impl Freeze for QuantizationParams

impl RefUnwindSafe for QuantizationParams

impl Send for QuantizationParams

impl Sync for QuantizationParams

impl Unpin for QuantizationParams

impl UnsafeUnpin for QuantizationParams

impl UnwindSafe for QuantizationParams

Blanket Implementations§

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> CloneToUninit for Twhere T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

impl<T> Pointable for T

const ALIGN: usize

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

Struct QuantizationParams

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

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

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

impl<T> CloneToUninit for T
where T: Clone,

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

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

impl<T> ToOwned for T
where T: Clone,

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

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