枚举 AVChannelOrder 

#[repr(i32)]
pub enum AVChannelOrder {
    AV_CHANNEL_ORDER_UNSPEC = 0,
    AV_CHANNEL_ORDER_NATIVE = 1,
    AV_CHANNEL_ORDER_CUSTOM = 2,
    AV_CHANNEL_ORDER_AMBISONIC = 3,
    FF_CHANNEL_ORDER_NB = 4,
}

Variants

AV_CHANNEL_ORDER_UNSPEC = 0

Only the channel count is specified, without any further information about the channel order.

AV_CHANNEL_ORDER_NATIVE = 1

The native channel order, i.e. the channels are in the same order in which they are defined in the AVChannel enum. This supports up to 63 different channels.

AV_CHANNEL_ORDER_CUSTOM = 2

The channel order does not correspond to any other predefined order and is stored as an explicit map. For example, this could be used to support layouts with 64 or more channels, or with empty/skipped (AV_CHAN_UNUSED) channels at arbitrary positions.

AV_CHANNEL_ORDER_AMBISONIC = 3

The audio is represented as the decomposition of the sound field into spherical harmonics. Each channel corresponds to a single expansion component. Channels are ordered according to ACN (Ambisonic Channel Number).

The channel with the index n in the stream contains the spherical harmonic of degree l and order m given by @code{.unparsed} l = floor(sqrt(n)), m = n - l * (l + 1). @endcode

Conversely given a spherical harmonic of degree l and order m, the corresponding channel index n is given by @code{.unparsed} n = l * (l + 1) + m. @endcode

Normalization is assumed to be SN3D (Schmidt Semi-Normalization) as defined in AmbiX format $ 2.1.

FF_CHANNEL_ORDER_NB = 4

Number of channel orders, not part of ABI/API

trait 实现

impl Clone for AVChannelOrder

fn clone(&self) -> AVChannelOrder

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 AVChannelOrder

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 AVChannelOrder

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 AVChannelOrder

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

impl Eq for AVChannelOrder

impl StructuralPartialEq for AVChannelOrder