枚举 AVDevToAppMessageType 

#[repr(i32)]
pub enum AVDevToAppMessageType {
    AV_DEV_TO_APP_NONE = 1_313_820_229,
    AV_DEV_TO_APP_CREATE_WINDOW_BUFFER = 1_111_708_229,
    AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER = 1_112_560_197,
    AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER = 1_111_771_475,
    AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER = 1_111_770_451,
    AV_DEV_TO_APP_BUFFER_OVERFLOW = 1_112_491_596,
    AV_DEV_TO_APP_BUFFER_UNDERFLOW = 1_112_884_812,
    AV_DEV_TO_APP_BUFFER_READABLE = 1_112_687_648,
    AV_DEV_TO_APP_BUFFER_WRITABLE = 1_113_018_912,
    AV_DEV_TO_APP_MUTE_STATE_CHANGED = 1_129_141_588,
    AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED = 1_129_729_868,
}

Message types used by avdevice_dev_to_app_control_message().

Variants

AV_DEV_TO_APP_NONE = 1_313_820_229

Dummy message.

AV_DEV_TO_APP_CREATE_WINDOW_BUFFER = 1_111_708_229

Create window buffer message.

Device requests to create a window buffer. Exact meaning is device- and application-dependent. Message is sent before rendering first frame and all one-shot initializations should be done here. Application is allowed to ignore preferred window buffer size.

@note: Application is obligated to inform about window buffer size with AV_APP_TO_DEV_WINDOW_SIZE message.

data: AVDeviceRect: preferred size of the window buffer. NULL: no preferred size of the window buffer.

AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER = 1_112_560_197

Prepare window buffer message.

Device requests to prepare a window buffer for rendering. Exact meaning is device- and application-dependent. Message is sent before rendering of each frame.

data: NULL.

AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER = 1_111_771_475

Display window buffer message.

Device requests to display a window buffer. Message is sent when new frame is ready to be displayed. Usually buffers need to be swapped in handler of this message.

data: NULL.

AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER = 1_111_770_451

Destroy window buffer message.

Device requests to destroy a window buffer. Message is sent when device is about to be destroyed and window buffer is not required anymore.

data: NULL.

AV_DEV_TO_APP_BUFFER_OVERFLOW = 1_112_491_596

Buffer fullness status messages.

Device signals buffer overflow/underflow.

data: NULL.

AV_DEV_TO_APP_BUFFER_UNDERFLOW = 1_112_884_812

Buffer fullness status messages.

Device signals buffer overflow/underflow.

data: NULL.

AV_DEV_TO_APP_BUFFER_READABLE = 1_112_687_648

Buffer readable/writable.

Device informs that buffer is readable/writable. When possible, device informs how many bytes can be read/write.

@warning Device may not inform when number of bytes than can be read/write changes.

data: int64_t: amount of bytes available to read/write. NULL: amount of bytes available to read/write is not known.

AV_DEV_TO_APP_BUFFER_WRITABLE = 1_113_018_912

Buffer readable/writable.

Device informs that buffer is readable/writable. When possible, device informs how many bytes can be read/write.

@warning Device may not inform when number of bytes than can be read/write changes.

data: int64_t: amount of bytes available to read/write. NULL: amount of bytes available to read/write is not known.

AV_DEV_TO_APP_MUTE_STATE_CHANGED = 1_129_141_588

Mute state change message.

Device informs that mute state has changed.

data: int: 0 for not muted state, non-zero for muted state.

AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED = 1_129_729_868

Volume level change message.

Device informs that volume level has changed.

data: double: new volume with range of 0.0 - 1.0.

trait 实现

impl Clone for AVDevToAppMessageType

fn clone(&self) -> AVDevToAppMessageType

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 AVDevToAppMessageType

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 AVDevToAppMessageType

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 AVDevToAppMessageType

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

impl Eq for AVDevToAppMessageType

impl StructuralPartialEq for AVDevToAppMessageType