结构体 AVChannelLayout 

#[repr(C)]
pub struct AVChannelLayout {
    pub order: AVChannelOrder,
    pub nb_channels: c_int,
    pub u: AVChannelLayout__bindgen_ty_1,
    pub opaque: *mut c_void,
}

An AVChannelLayout holds information about the channel layout of audio data.

A channel layout here is defined as a set of channels ordered in a specific way (unless the channel order is AV_CHANNEL_ORDER_UNSPEC, in which case an AVChannelLayout carries only the channel count). All orders may be treated as if they were AV_CHANNEL_ORDER_UNSPEC by ignoring everything but the channel count, as long as av_channel_layout_check() considers they are valid.

Unlike most structures in FFmpeg, sizeof(AVChannelLayout) is a part of the public ABI and may be used by the caller. E.g. it may be allocated on stack or embedded in caller-defined structs.

AVChannelLayout can be initialized as follows:

• default initialization with {0}, followed by setting all used fields correctly;
• by assigning one of the predefined AV_CHANNEL_LAYOUT_* initializers;
• with a constructor function, such as av_channel_layout_default(), av_channel_layout_from_mask() or av_channel_layout_from_string().

The channel layout must be uninitialized with av_channel_layout_uninit()

Copying an AVChannelLayout via assigning is forbidden, av_channel_layout_copy() must be used instead (and its return value should be checked)

No new fields may be added to it without a major version bump, except for new elements of the union fitting in sizeof(uint64_t).

Fields

order: AVChannelOrder

Channel order used in this layout. This is a mandatory field.

nb_channels: c_int

Number of channels in this layout. Mandatory field.

u: AVChannelLayout__bindgen_ty_1

opaque: *mut c_void

For some private data of the user.

trait 实现

impl Clone for AVChannelLayout

fn clone(&self) -> AVChannelLayout

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 Copy for AVChannelLayout