枚举 AVOptionType 

#[repr(i32)]
pub enum AVOptionType {
    AV_OPT_TYPE_FLAGS = 1,
    AV_OPT_TYPE_INT = 2,
    AV_OPT_TYPE_INT64 = 3,
    AV_OPT_TYPE_DOUBLE = 4,
    AV_OPT_TYPE_FLOAT = 5,
    AV_OPT_TYPE_STRING = 6,
    AV_OPT_TYPE_RATIONAL = 7,
    AV_OPT_TYPE_BINARY = 8,
    AV_OPT_TYPE_DICT = 9,
    AV_OPT_TYPE_UINT64 = 10,
    AV_OPT_TYPE_CONST = 11,
    AV_OPT_TYPE_IMAGE_SIZE = 12,
    AV_OPT_TYPE_PIXEL_FMT = 13,
    AV_OPT_TYPE_SAMPLE_FMT = 14,
    AV_OPT_TYPE_VIDEO_RATE = 15,
    AV_OPT_TYPE_DURATION = 16,
    AV_OPT_TYPE_COLOR = 17,
    AV_OPT_TYPE_BOOL = 18,
    AV_OPT_TYPE_CHLAYOUT = 19,
    AV_OPT_TYPE_UINT = 20,
    AV_OPT_TYPE_FLAG_ARRAY = 65_536,
}

An option type determines:

• for native access, the underlying C type of the field that an AVOption refers to;
• for foreign access, the semantics of accessing the option through this API, e.g. which av_opt_get_() and av_opt_set_() functions can be called, or what format will av_opt_get()/av_opt_set() expect/produce.

Variants

AV_OPT_TYPE_FLAGS = 1

Underlying C type is unsigned int.

AV_OPT_TYPE_INT = 2

Underlying C type is int.

AV_OPT_TYPE_INT64 = 3

Underlying C type is int64_t.

AV_OPT_TYPE_DOUBLE = 4

Underlying C type is double.

AV_OPT_TYPE_FLOAT = 5

Underlying C type is float.

AV_OPT_TYPE_STRING = 6

Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_malloc() family of functions.

AV_OPT_TYPE_RATIONAL = 7

Underlying C type is AVRational.

AV_OPT_TYPE_BINARY = 8

Underlying C type is a uint8_t* that is either NULL or points to an array allocated with the av_malloc() family of functions. The pointer is immediately followed by an int containing the array length in bytes.

AV_OPT_TYPE_DICT = 9

Underlying C type is AVDictionary*.

AV_OPT_TYPE_UINT64 = 10

Underlying C type is uint64_t.

AV_OPT_TYPE_CONST = 11

Special option type for declaring named constants. Does not correspond to an actual field in the object, offset must be 0.

AV_OPT_TYPE_IMAGE_SIZE = 12

Underlying C type is two consecutive integers.

AV_OPT_TYPE_PIXEL_FMT = 13

Underlying C type is enum AVPixelFormat.

AV_OPT_TYPE_SAMPLE_FMT = 14

Underlying C type is enum AVSampleFormat.

AV_OPT_TYPE_VIDEO_RATE = 15

Underlying C type is AVRational.

AV_OPT_TYPE_DURATION = 16

Underlying C type is int64_t.

AV_OPT_TYPE_COLOR = 17

Underlying C type is uint8_t[4].

AV_OPT_TYPE_BOOL = 18

Underlying C type is int.

AV_OPT_TYPE_CHLAYOUT = 19

Underlying C type is AVChannelLayout.

AV_OPT_TYPE_UINT = 20

Underlying C type is unsigned int.

AV_OPT_TYPE_FLAG_ARRAY = 65_536

May be combined with another regular option type to declare an array option.

For array options, @ref AVOption.offset should refer to a pointer corresponding to the option type. The pointer should be immediately followed by an unsigned int that will store the number of elements in the array.

trait 实现

impl Clone for AVOptionType

fn clone(&self) -> AVOptionType

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 AVOptionType

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 AVOptionType

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 AVOptionType

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

impl Eq for AVOptionType

impl StructuralPartialEq for AVOptionType