Enum ffmpeg_sys_next::AVDevToAppMessageType

#[repr(u32)]
pub enum AVDevToAppMessageType {
    AV_DEV_TO_APP_NONE,
    AV_DEV_TO_APP_CREATE_WINDOW_BUFFER,
    AV_DEV_TO_APP_PREPARE_WINDOW_BUFFER,
    AV_DEV_TO_APP_DISPLAY_WINDOW_BUFFER,
    AV_DEV_TO_APP_DESTROY_WINDOW_BUFFER,
    AV_DEV_TO_APP_BUFFER_OVERFLOW,
    AV_DEV_TO_APP_BUFFER_UNDERFLOW,
    AV_DEV_TO_APP_BUFFER_READABLE,
    AV_DEV_TO_APP_BUFFER_WRITABLE,
    AV_DEV_TO_APP_MUTE_STATE_CHANGED,
    AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED,
}

Message types used by avdevice_dev_to_app_control_message().

Variants

AV_DEV_TO_APP_NONE

Dummy message.

AV_DEV_TO_APP_CREATE_WINDOW_BUFFER

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

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

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

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

Buffer fullness status messages.

Device signals buffer overflow/underflow.

data: NULL.

AV_DEV_TO_APP_BUFFER_UNDERFLOW

Buffer fullness status messages.

Device signals buffer overflow/underflow.

data: NULL.

AV_DEV_TO_APP_BUFFER_READABLE

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

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

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

Volume level change message.

Device informs that volume level has changed.

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

Trait Implementations

impl Clone for AVDevToAppMessageType

fn clone(&self) -> AVDevToAppMessageType

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AVDevToAppMessageType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for AVDevToAppMessageType

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl PartialEq<AVDevToAppMessageType> for AVDevToAppMessageType

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

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for AVDevToAppMessageType

impl Eq for AVDevToAppMessageType

impl StructuralEq for AVDevToAppMessageType

impl StructuralPartialEq for AVDevToAppMessageType