枚举 AVRounding 

#[repr(i32)]
pub enum AVRounding {
    AV_ROUND_ZERO = 0,
    AV_ROUND_INF = 1,
    AV_ROUND_DOWN = 2,
    AV_ROUND_UP = 3,
    AV_ROUND_NEAR_INF = 5,
    AV_ROUND_PASS_MINMAX = 8_192,
}

Rounding methods.

Variants

AV_ROUND_ZERO = 0

< Round toward zero.

AV_ROUND_INF = 1

< Round away from zero.

AV_ROUND_DOWN = 2

< Round toward -infinity.

AV_ROUND_UP = 3

< Round toward +infinity.

AV_ROUND_NEAR_INF = 5

< Round to nearest and halfway cases away from zero.

AV_ROUND_PASS_MINMAX = 8_192

Flag telling rescaling functions to pass INT64_MIN/MAX through unchanged, avoiding special cases for #AV_NOPTS_VALUE.

Unlike other values of the enumeration AVRounding, this value is a bitmask that must be used in conjunction with another value of the enumeration through a bitwise OR, in order to set behavior for normal cases.

@code{.c} av_rescale_rnd(3, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX); // Rescaling 3: // Calculating 3 * 1 / 2 // 3 / 2 is rounded up to 2 // => 2

av_rescale_rnd(AV_NOPTS_VALUE, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX); // Rescaling AV_NOPTS_VALUE: // AV_NOPTS_VALUE == INT64_MIN // AV_NOPTS_VALUE is passed through // => AV_NOPTS_VALUE @endcode

trait 实现

impl Clone for AVRounding

fn clone(&self) -> AVRounding

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 AVRounding

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 Hash for AVRounding

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. 阅读更多

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. 阅读更多

impl PartialEq for AVRounding

fn eq(&self, other: &AVRounding) -> 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 AVRounding

impl Eq for AVRounding

impl StructuralPartialEq for AVRounding