结构体 SwsContext 

#[repr(C)]
pub struct SwsContext {

    pub av_class: *const AVClass,
    pub opaque: *mut c_void,
    pub flags: c_uint,
    pub scaler_params: [f64; 2],
    pub threads: c_int,
    pub dither: SwsDither,
    pub alpha_blend: SwsAlphaBlend,
    pub gamma_flag: c_int,
    pub src_w: c_int,
    pub src_h: c_int,
    pub dst_w: c_int,
    pub dst_h: c_int,
    pub src_format: c_int,
    pub dst_format: c_int,
    pub src_range: c_int,
    pub dst_range: c_int,
    pub src_v_chr_pos: c_int,
    pub src_h_chr_pos: c_int,
    pub dst_v_chr_pos: c_int,
    pub dst_h_chr_pos: c_int,
    pub intent: c_int,
}

Main external API structure. New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. sizeof(SwsContext) is not part of the ABI.

Fields

av_class: *const AVClass

opaque: *mut c_void

Private data of the user, can be used to carry app specific stuff.

flags: c_uint

Bitmask of SWS_*. See SwsFlags for details.

scaler_params: [f64; 2]

Extra parameters for fine-tuning certain scalers.

threads: c_int

How many threads to use for processing, or 0 for automatic selection.

dither: SwsDither

Dither mode.

alpha_blend: SwsAlphaBlend

Alpha blending mode. See SwsAlphaBlend for details.

gamma_flag: c_int

Use gamma correct scaling.

src_w: c_int

< Width and height of the source frame

src_h: c_int

< Width and height of the source frame

dst_w: c_int

< Width and height of the destination frame

dst_h: c_int

< Width and height of the destination frame

src_format: c_int

< Source pixel format

dst_format: c_int

< Destination pixel format

src_range: c_int

< Source is full range

dst_range: c_int

< Destination is full range

src_v_chr_pos: c_int

< Source vertical chroma position in luma grid / 256

src_h_chr_pos: c_int

< Source horizontal chroma position

dst_v_chr_pos: c_int

< Destination vertical chroma position

dst_h_chr_pos: c_int

< Destination horizontal chroma position

intent: c_int

Desired ICC intent for color space conversions.

trait 实现

impl Clone for SwsContext

fn clone(&self) -> SwsContext

Returns a duplicate of the value. 阅读更多

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

从 source 执行拷贝赋值。 阅读更多

impl Debug for SwsContext

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

使用给定的格式化器格式化该值。 阅读更多

impl PartialEq for SwsContext

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

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

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

测试 !=。默认实现几乎总是足够的，没有充分理由不应被重写。

impl Copy for SwsContext

impl StructuralPartialEq for SwsContext