Struct cros_codecs::utils::vaapi::VaapiBackend

pub(crate) struct VaapiBackend<StreamData>where
    for<'a> &'a StreamData: StreamInfo,{
    pub(crate) metadata_state: StreamMetadataState,
    pub(crate) negotiation_status: NegotiationStatus<Box<StreamData>>,
    pub(crate) pending_jobs: VecDeque<Rc<RefCell<GenericBackendHandle>>>,
}

Fields

metadata_state: StreamMetadataState

The metadata state. Updated whenever the decoder reads new data from the stream.

negotiation_status: NegotiationStatus<Box<StreamData>>

The negotiation status

pending_jobs: VecDeque<Rc<RefCell<GenericBackendHandle>>>

The FIFO for all pending pictures, in the order they were submitted.

Implementations

impl<StreamData> VaapiBackend<StreamData>where
    for<'a> &'a StreamData: StreamInfo,

pub(crate) fn new(display: Rc<Display>) -> Self

pub(crate) fn process_picture(
    &mut self,
    picture: Picture<PictureNew>,
    block: BlockingMode
) -> StatelessBackendResult<<Self as VideoDecoderBackend>::Handle>

fn build_va_decoded_handle(
    &self,
    picture: Rc<RefCell<GenericBackendHandle>>,
    timestamp: u64
) -> <Self as VideoDecoderBackend>::Handle

Trait Implementations

impl<StreamData> VideoDecoderBackend for VaapiBackend<StreamData>where
    for<'a> &'a StreamData: StreamInfo,

type Handle = DecodedHandle

The type that the backend returns as a result of a decode operation. This will usually be some backend-specific type with a resource and a resource pool so that said buffer can be reused for another decode operation when it goes out of scope.

fn coded_resolution(&self) -> Option<Resolution>

Returns the current coded resolution of the bitstream being processed. This may be None if we have not read the stream parameters yet.

fn display_resolution(&self) -> Option<Resolution>

Returns the current display resolution of the bitstream being processed. This may be None if we have not read the stream parameters yet.

fn num_resources_total(&self) -> usize

Gets the number of output resources allocated by the backend.

fn num_resources_left(&self) -> usize

Gets the number of output resources left in the backend.

fn format(&self) -> Option<DecodedFormat>

Gets the chosen format. This is set to a default after the decoder reads enough stream metadata from the bitstream. Some buffers need to be processed first before the default format can be set.

fn try_format(&mut self, format: DecodedFormat) -> VideoDecoderResult<()>

Try altering the decoded format.

fn poll(
    &mut self,
    blocking_mode: BlockingMode
) -> VideoDecoderResult<VecDeque<Self::Handle>>

Poll for any ready pictures. block dictates whether this call should block on the operation or return immediately.

fn handle_is_ready(&self, handle: &Self::Handle) -> bool

Whether the handle is ready for presentation. The decoder will check this before returning the handle to clients.

fn block_on_handle(
    &mut self,
    handle: &Self::Handle
) -> StatelessBackendResult<()>

Block on handle handle.