Struct cros_codecs::decoder::stateless::StatelessDecoder

pub struct StatelessDecoder<C, B>where
    C: StatelessCodec,
    B: StatelessDecoderBackend<C::FormatInfo>,{ /* private fields */ }

A struct that serves as a basis to implement a stateless decoder.

A stateless decoder is defined by three generic parameters:

• A codec, represented by a type that implements StatelessCodec. This type defines the codec-specific decoder state and other codec properties.
• A backend, i.e. an interface to talk to the hardware that accelerates decoding. An example is the VAAPI backend that uses VAAPI for acceleration. The backend will typically itself be typed against a memory decriptor, defining how memory is provided for decoded frames.

So for instance, a decoder for the H264 codec, using VAAPI for acceleration with self-managed memory, will have the following type:

let decoder: StatelessDecoder<H264, VaapiBackend<()>>;

This struct just manages the high-level decoder state as well as the queue of decoded frames. All the rest is left to codec-specific code.

Implementations

impl<M: SurfaceMemoryDescriptor + 'static> StatelessDecoder<H264, VaapiBackend<(), M>>

pub fn new_vaapi<S>(display: Rc<Display>, blocking_mode: BlockingMode) -> Selfwhere M: From<S>, S: From<M>,

impl<M: SurfaceMemoryDescriptor + 'static> StatelessDecoder<H265, VaapiBackend<BackendData, M>>

pub fn new_vaapi<S>(display: Rc<Display>, blocking_mode: BlockingMode) -> Selfwhere M: From<S>, S: From<M>,

impl<M: SurfaceMemoryDescriptor + 'static> StatelessDecoder<Vp8, VaapiBackend<(), M>>

pub fn new_vaapi<S>(display: Rc<Display>, blocking_mode: BlockingMode) -> Selfwhere M: From<S>, S: From<M>,

impl<M: SurfaceMemoryDescriptor + 'static> StatelessDecoder<Vp9, VaapiBackend<(), M>>

pub fn new_vaapi<S>(display: Rc<Display>, blocking_mode: BlockingMode) -> Selfwhere M: From<S>, S: From<M>,

impl<C, B> StatelessDecoder<C, B>where C: StatelessCodec, B: StatelessDecoderBackend<C::FormatInfo>, C::DecoderState<B>: Default,

pub fn new(backend: B, blocking_mode: BlockingMode) -> Self

Trait Implementations

impl<B> StatelessVideoDecoder<<<B as StatelessDecoderBackend<Header>>::Handle as DecodedHandle>::Descriptor> for StatelessDecoder<Vp8, B>where B: StatelessVp8DecoderBackend, B::Handle: Clone + 'static,

fn decode( &mut self, timestamp: u64, bitstream: &[u8] ) -> Result<usize, DecodeError>

Try to decode the bitstream represented by timestamp.

fn flush(&mut self) -> Result<(), DecodeError>

Flush the decoder i.e. finish processing all pending decode requests and make sure the resulting frames are ready to be retrieved via next_event.

fn next_event( &mut self ) -> Option<DecoderEvent<'_, <B::Handle as DecodedHandle>::Descriptor>>

Returns the next event, if there is any pending.

fn surface_pool( &mut self ) -> &mut dyn SurfacePool<<B::Handle as DecodedHandle>::Descriptor>

Returns the surface pool in use with the decoder. Useful to add new frames as decode. targets.

fn stream_info(&self) -> Option<&StreamInfo>

impl<B> StatelessVideoDecoder<<<B as StatelessDecoderBackend<Header>>::Handle as DecodedHandle>::Descriptor> for StatelessDecoder<Vp9, B>where B: StatelessVp9DecoderBackend, B::Handle: Clone + 'static,

fn decode( &mut self, timestamp: u64, bitstream: &[u8] ) -> Result<usize, DecodeError>

Try to decode the bitstream represented by timestamp.

fn flush(&mut self) -> Result<(), DecodeError>

Flush the decoder i.e. finish processing all pending decode requests and make sure the resulting frames are ready to be retrieved via next_event.

fn next_event( &mut self ) -> Option<DecoderEvent<'_, <B::Handle as DecodedHandle>::Descriptor>>

Returns the next event, if there is any pending.

fn surface_pool( &mut self ) -> &mut dyn SurfacePool<<B::Handle as DecodedHandle>::Descriptor>

Returns the surface pool in use with the decoder. Useful to add new frames as decode. targets.

fn stream_info(&self) -> Option<&StreamInfo>

impl<B> StatelessVideoDecoder<<<B as StatelessDecoderBackend<Sps>>::Handle as DecodedHandle>::Descriptor> for StatelessDecoder<H264, B>where B: StatelessH264DecoderBackend, B::Handle: Clone + 'static,

fn decode( &mut self, timestamp: u64, bitstream: &[u8] ) -> Result<usize, DecodeError>

Try to decode the bitstream represented by timestamp.

fn flush(&mut self) -> Result<(), DecodeError>

Flush the decoder i.e. finish processing all pending decode requests and make sure the resulting frames are ready to be retrieved via next_event.

fn next_event( &mut self ) -> Option<DecoderEvent<'_, <B::Handle as DecodedHandle>::Descriptor>>

Returns the next event, if there is any pending.

fn surface_pool( &mut self ) -> &mut dyn SurfacePool<<B::Handle as DecodedHandle>::Descriptor>

Returns the surface pool in use with the decoder. Useful to add new frames as decode. targets.

fn stream_info(&self) -> Option<&StreamInfo>

impl<B> StatelessVideoDecoder<<<B as StatelessDecoderBackend<Sps>>::Handle as DecodedHandle>::Descriptor> for StatelessDecoder<H265, B>where B: StatelessH265DecoderBackend, B::Handle: Clone + 'static,

fn decode( &mut self, timestamp: u64, bitstream: &[u8] ) -> Result<usize, DecodeError>

Try to decode the bitstream represented by timestamp.

fn flush(&mut self) -> Result<(), DecodeError>

Flush the decoder i.e. finish processing all pending decode requests and make sure the resulting frames are ready to be retrieved via next_event.

fn next_event( &mut self ) -> Option<DecoderEvent<'_, <B::Handle as DecodedHandle>::Descriptor>>

Returns the next event, if there is any pending.

fn surface_pool( &mut self ) -> &mut dyn SurfacePool<<B::Handle as DecodedHandle>::Descriptor>

Returns the surface pool in use with the decoder. Useful to add new frames as decode. targets.

fn stream_info(&self) -> Option<&StreamInfo>